channel.h File Reference

General Asterisk PBX channel definitions. More...

#include "asterisk/abstract_jb.h"
#include "asterisk/astobj2.h"
#include "asterisk/poll-compat.h"
#include "asterisk/frame.h"
#include "asterisk/sched.h"
#include "asterisk/chanvars.h"
#include "asterisk/config.h"
#include "asterisk/lock.h"
#include "asterisk/cdr.h"
#include "asterisk/utils.h"
#include "asterisk/linkedlists.h"
#include "asterisk/stringfields.h"
#include "asterisk/datastore.h"
#include "asterisk/data.h"
#include "asterisk/channelstate.h"
#include "asterisk/ccss.h"
#include "asterisk/framehook.h"

Include dependency graph for channel.h:

Go to the source code of this file.

Data Structures
struct	ast_bridge_config
	bridge configuration More...
struct	ast_chan_write_info_t
	Structure to handle passing func_channel_write info to channels via setoption. More...
struct	ast_channel
	Main Channel structure associated with a channel. More...
struct	ast_channel_tech
	Structure to describe a channel "technology", ie a channel driver See for examples:. More...
struct	ast_generator
struct	ast_group_info
	channel group info More...
struct	ast_party_caller
	Caller Party information. More...
struct	ast_party_connected_line
	Connected Line/Party information. More...
struct	ast_party_dialed
	Dialed/Called Party information. More...
struct	ast_party_id
	Information needed to identify an endpoint in a call. More...
struct	ast_party_name
	Information needed to specify a name in a call. More...
struct	ast_party_number
	Information needed to specify a number in a call. More...
struct	ast_party_redirecting
	Redirecting Line information. RDNIS (Redirecting Directory Number Information Service) Where a call diversion or transfer was invoked. More...
struct	ast_party_subaddress
	Information needed to specify a subaddress in a call. More...
struct	ast_set_party_caller
	Indicate what information in ast_party_caller should be set. More...
struct	ast_set_party_connected_line
	Indicate what information in ast_party_connected_line should be set. More...
struct	ast_set_party_id
	Indicate what information in ast_party_id should be set. More...
struct	ast_set_party_redirecting
	Indicate what information in ast_party_redirecting should be set. More...
struct	outgoing_helper
Defines
#define	AST_AGENT_FD   (AST_MAX_FDS-3)
#define	AST_ALERT_FD   (AST_MAX_FDS-1)
#define	AST_BRIDGE_DTMF_CHANNEL_0   (1 << 0)
	Report DTMF on channel 0.
#define	AST_BRIDGE_DTMF_CHANNEL_1   (1 << 1)
	Report DTMF on channel 1.
#define	AST_BRIDGE_IGNORE_SIGS   (1 << 4)
	Ignore all signal frames except NULL.
#define	AST_BRIDGE_REC_CHANNEL_0   (1 << 2)
	Return all voice frames on channel 0.
#define	AST_BRIDGE_REC_CHANNEL_1   (1 << 3)
	Return all voice frames on channel 1.
#define	AST_CHAN_WRITE_INFO_T_VERSION   1
	ast_chan_write_info_t version. Must be incremented if structure is changed
#define	ast_channel_alloc(needqueue, state, cid_num, cid_name, acctcode, exten, context, linkedid, amaflag,...)
	Create a channel structure.
#define	ast_channel_lock(chan)   ao2_lock(chan)
#define	ast_channel_lock_both(chan1, chan2)
	Lock two channels.
#define	AST_CHANNEL_NAME   80
#define	ast_channel_ref(c)   ({ ao2_ref(c, +1); (c); })
	Increase channel reference count.
#define	ast_channel_trylock(chan)   ao2_trylock(chan)
#define	ast_channel_unlock(chan)   ao2_unlock(chan)
#define	ast_channel_unref(c)   ({ ao2_ref(c, -1); (struct ast_channel *) (NULL); })
	Decrease channel reference count.
#define	ast_dummy_channel_alloc()   __ast_dummy_channel_alloc(__FILE__, __LINE__, __PRETTY_FUNCTION__)
	Create a fake channel structure.
#define	AST_GENERATOR_FD   (AST_MAX_FDS-4)
#define	AST_MAX_CONTEXT   80
#define	AST_MAX_EXTENSION   80
#define	AST_MAX_FDS   10
#define	AST_TIMING_FD   (AST_MAX_FDS-2)
#define	CHECK_BLOCKING(c)
#define	DATASTORE_INHERIT_FOREVER   INT_MAX
#define	DEBUGCHAN_FLAG   0x80000000
#define	FRAMECOUNT_INC(x)   ( ((x) & DEBUGCHAN_FLAG) | (((x)+1) & ~DEBUGCHAN_FLAG) )
#define	MAX_LANGUAGE   40
#define	MAX_MUSICCLASS   80
Typedefs
typedef int(*	ast_acf_read2_fn_t )(struct ast_channel *, const char *, char *, struct ast_str **, ssize_t)
	Typedef for a custom read2 function.
typedef int(*	ast_acf_read_fn_t )(struct ast_channel *, const char *, char *, char *, size_t)
	Typedef for a custom read function.
typedef int(*	ast_acf_write_fn_t )(struct ast_channel *, const char *, char *, const char *)
	Typedef for a custom write function.
typedef unsigned long long	ast_group_t
Enumerations
enum	{ AST_CHAN_TP_WANTSJITTER = (1 << 0), AST_CHAN_TP_CREATESJITTER = (1 << 1) }
	ast_channel_tech Properties More...
enum	{   AST_FLAG_DEFER_DTMF = (1 << 1), AST_FLAG_WRITE_INT = (1 << 2), AST_FLAG_BLOCKING = (1 << 3), AST_FLAG_ZOMBIE = (1 << 4),   AST_FLAG_EXCEPTION = (1 << 5), AST_FLAG_MOH = (1 << 6), AST_FLAG_SPYING = (1 << 7), AST_FLAG_NBRIDGE = (1 << 8),   AST_FLAG_IN_AUTOLOOP = (1 << 9), AST_FLAG_OUTGOING = (1 << 10), AST_FLAG_IN_DTMF = (1 << 12), AST_FLAG_EMULATE_DTMF = (1 << 13),   AST_FLAG_END_DTMF_ONLY = (1 << 14), AST_FLAG_ANSWERED_ELSEWHERE = (1 << 15), AST_FLAG_MASQ_NOSTREAM = (1 << 16), AST_FLAG_BRIDGE_HANGUP_RUN = (1 << 17),   AST_FLAG_BRIDGE_HANGUP_DONT = (1 << 18), AST_FLAG_DISABLE_WORKAROUNDS = (1 << 20), AST_FLAG_DISABLE_DEVSTATE_CACHE = (1 << 21), AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT = (1 << 22) }
	ast_channel flags More...
enum	{   AST_FEATURE_PLAY_WARNING = (1 << 0), AST_FEATURE_REDIRECT = (1 << 1), AST_FEATURE_DISCONNECT = (1 << 2), AST_FEATURE_ATXFER = (1 << 3),   AST_FEATURE_AUTOMON = (1 << 4), AST_FEATURE_PARKCALL = (1 << 5), AST_FEATURE_AUTOMIXMON = (1 << 6), AST_FEATURE_NO_H_EXTEN = (1 << 7),   AST_FEATURE_WARNING_ACTIVE = (1 << 8) }
	ast_bridge_config flags More...
enum	{   AST_SOFTHANGUP_DEV = (1 << 0), AST_SOFTHANGUP_ASYNCGOTO = (1 << 1), AST_SOFTHANGUP_SHUTDOWN = (1 << 2), AST_SOFTHANGUP_TIMEOUT = (1 << 3),   AST_SOFTHANGUP_APPUNLOAD = (1 << 4), AST_SOFTHANGUP_EXPLICIT = (1 << 5), AST_SOFTHANGUP_UNBRIDGE = (1 << 6), AST_SOFTHANGUP_ALL = (0xFFFFFFFF) }
enum	ast_bridge_result { AST_BRIDGE_COMPLETE = 0, AST_BRIDGE_FAILED = -1, AST_BRIDGE_FAILED_NOWARN = -2, AST_BRIDGE_RETRY = -3 }
enum	ast_channel_adsicpe { AST_ADSI_UNKNOWN, AST_ADSI_AVAILABLE, AST_ADSI_UNAVAILABLE, AST_ADSI_OFFHOOKONLY }
enum	AST_PARTY_CHAR_SET {   AST_PARTY_CHAR_SET_UNKNOWN = 0, AST_PARTY_CHAR_SET_ISO8859_1 = 1, AST_PARTY_CHAR_SET_WITHDRAWN = 2, AST_PARTY_CHAR_SET_ISO8859_2 = 3,   AST_PARTY_CHAR_SET_ISO8859_3 = 4, AST_PARTY_CHAR_SET_ISO8859_4 = 5, AST_PARTY_CHAR_SET_ISO8859_5 = 6, AST_PARTY_CHAR_SET_ISO8859_7 = 7,   AST_PARTY_CHAR_SET_ISO10646_BMPSTRING = 8, AST_PARTY_CHAR_SET_ISO10646_UTF_8STRING = 9 }
enum	ast_t38_state {   T38_STATE_UNAVAILABLE, T38_STATE_UNKNOWN, T38_STATE_NEGOTIATING, T38_STATE_REJECTED,   T38_STATE_NEGOTIATED }
	Possible T38 states on channels. More...
enum	channelreloadreason { CHANNEL_MODULE_LOAD, CHANNEL_MODULE_RELOAD, CHANNEL_CLI_RELOAD, CHANNEL_MANAGER_RELOAD }
	Channel reload reasons for manager events at load or reload of configuration. More...
Functions
int	__ast_answer (struct ast_channel *chan, unsigned int delay, int cdr_answer)
	Answer a channel, with a selectable delay before returning.
struct ast_channel *attribute_malloc	__ast_channel_alloc (int needqueue, int state, const char *cid_num, const char *cid_name, const char *acctcode, const char *exten, const char *context, const char *linkedid, const int amaflag, const char *file, int line, const char *function, const char *name_fmt,...)
	Create a channel structure.
struct ast_channel *	__ast_dummy_channel_alloc (const char *file, int line, const char *function)
struct ast_channel *	__ast_request_and_dial (const char *type, format_t format, const struct ast_channel *requestor, void *data, int timeout, int *reason, const char *cid_num, const char *cid_name, struct outgoing_helper *oh)
	Request a channel of a given type, with data as optional information used by the low level module and attempt to place a call on it.
int	ast_activate_generator (struct ast_channel *chan, struct ast_generator *gen, void *params)
int	ast_active_channels (void)
	returns number of active/allocated channels
static int	ast_add_fd (struct pollfd *pfd, int fd)
	if fd is a valid descriptor, set *pfd with the descriptor
int	ast_answer (struct ast_channel *chan)
	Answer a channel.
int	ast_autoservice_ignore (struct ast_channel *chan, enum ast_frame_type ftype)
	Ignore certain frame types.
int	ast_autoservice_start (struct ast_channel *chan)
	Automatically service a channel for us...
int	ast_autoservice_stop (struct ast_channel *chan)
	Stop servicing a channel for us...
void	ast_begin_shutdown (int hangup)
format_t	ast_best_codec (format_t fmts)
	Pick the best audio codec.
struct ast_channel *	ast_bridged_channel (struct ast_channel *chan)
	Find bridged channel.
int	ast_call (struct ast_channel *chan, char *addr, int timeout)
	Make a call.
struct ast_channel *	ast_call_forward (struct ast_channel *caller, struct ast_channel *orig, int *timeout, format_t format, struct outgoing_helper *oh, int *outstate)
	Forwards a call to a new channel specified by the original channel's call_forward str. If possible, the new forwarded channel is created and returned while the original one is terminated.
void	ast_cancel_shutdown (void)
	Cancel a shutdown in progress.
const char *	ast_cause2str (int state) attribute_pure
	Gives the string form of a given cause code.
void	ast_change_name (struct ast_channel *chan, const char *newname)
	Change channel name.
int	ast_channel_bridge (struct ast_channel *c0, struct ast_channel *c1, struct ast_bridge_config *config, struct ast_frame **fo, struct ast_channel **rc)
	Bridge two channels together.
struct ast_channel *	ast_channel_callback (ao2_callback_data_fn *cb_fn, void *arg, void *data, int ao2_flags)
	Call a function with every active channel.
int	ast_channel_cc_params_init (struct ast_channel *chan, const struct ast_cc_config_params *base_params)
	Set up datastore with CCSS parameters for a channel.
void	ast_channel_clear_softhangup (struct ast_channel *chan, int flag)
	Clear a set of softhangup flags from a channel.
int	ast_channel_cmpwhentohangup (struct ast_channel *chan, time_t offset)
	Compare a offset with the settings of when to hang a channel up.
int	ast_channel_cmpwhentohangup_tv (struct ast_channel *chan, struct timeval offset)
	Compare a offset with the settings of when to hang a channel up.
int	ast_channel_connected_line_macro (struct ast_channel *autoservice_chan, struct ast_channel *macro_chan, const void *connected_info, int caller, int frame)
	Run a connected line interception macro and update a channel's connected line information.
int	ast_channel_data_add_structure (struct ast_data *tree, struct ast_channel *chan, int add_bridged)
	Insert into an astdata tree, the channel structure.
int	ast_channel_data_cmp_structure (const struct ast_data_search *tree, struct ast_channel *chan, const char *structure_name)
	Compare to channel structures using the data api.
int	ast_channel_datastore_add (struct ast_channel *chan, struct ast_datastore *datastore)
	Add a datastore to a channel.
struct ast_datastore *attribute_malloc	ast_channel_datastore_alloc (const struct ast_datastore_info *info, const char *uid)
	Create a channel data store object.
struct ast_datastore *	ast_channel_datastore_find (struct ast_channel *chan, const struct ast_datastore_info *info, const char *uid)
	Find a datastore on a channel.
int	ast_channel_datastore_free (struct ast_datastore *datastore)
	Free a channel data store object.
int	ast_channel_datastore_inherit (struct ast_channel *from, struct ast_channel *to)
	Inherit datastores from a parent to a child.
int	ast_channel_datastore_remove (struct ast_channel *chan, struct ast_datastore *datastore)
	Remove a datastore from a channel.
int	ast_channel_defer_dtmf (struct ast_channel *chan)
	Defers DTMF so that you only read things like hangups and audio.
int	ast_channel_early_bridge (struct ast_channel *c0, struct ast_channel *c1)
	Bridge two channels together (early).
int	ast_channel_get_cc_agent_type (struct ast_channel *chan, char *agent_type, size_t size)
	Find the appropriate CC agent type to use given a channel.
struct ast_cc_config_params *	ast_channel_get_cc_config_params (struct ast_channel *chan)
	Get the CCSS parameters from a channel.
int	ast_channel_get_device_name (struct ast_channel *chan, char *device_name, size_t name_buffer_length)
	Get a device name given its channel structure.
static enum ast_t38_state	ast_channel_get_t38_state (struct ast_channel *chan)
	Retrieves the current T38 state of a channel.
void	ast_channel_inherit_variables (const struct ast_channel *parent, struct ast_channel *child)
	Inherits channel variable from parent to child channel.
int	ast_channel_make_compatible (struct ast_channel *c0, struct ast_channel *c1)
	Makes two channel formats compatible.
int	ast_channel_masquerade (struct ast_channel *original, struct ast_channel *clone)
	Weird function made for call transfers.
int	ast_channel_queryoption (struct ast_channel *channel, int option, void *data, int *datalen, int block)
	Checks the value of an option.
void	ast_channel_queue_connected_line_update (struct ast_channel *chan, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
	Queue a connected line update frame on a channel.
void	ast_channel_queue_redirecting_update (struct ast_channel *chan, const struct ast_party_redirecting *redirecting, const struct ast_set_party_redirecting *update)
	Queue a redirecting update frame on a channel.
const char *	ast_channel_reason2str (int reason)
	return an english explanation of the code returned thru __ast_request_and_dial's 'outstate' argument
int	ast_channel_redirecting_macro (struct ast_channel *autoservice_chan, struct ast_channel *macro_chan, const void *redirecting_info, int is_caller, int is_frame)
	Run a redirecting interception macro and update a channel's redirecting information.
int	ast_channel_register (const struct ast_channel_tech *tech)
	Register a channel technology (a new channel driver) Called by a channel module to register the kind of channels it supports.
struct ast_channel *	ast_channel_release (struct ast_channel *chan)
	Unlink and release reference to a channel.
int	ast_channel_sendhtml (struct ast_channel *channel, int subclass, const char *data, int datalen)
	Sends HTML on given channel Send HTML or URL on link.
int	ast_channel_sendurl (struct ast_channel *channel, const char *url)
	Sends a URL on a given link Send URL on link.
void	ast_channel_set_caller (struct ast_channel *chan, const struct ast_party_caller *caller, const struct ast_set_party_caller *update)
	Set the caller id information in the Asterisk channel.
void	ast_channel_set_caller_event (struct ast_channel *chan, const struct ast_party_caller *caller, const struct ast_set_party_caller *update)
	Set the caller id information in the Asterisk channel and generate an AMI event if the caller id name or number changed.
void	ast_channel_set_connected_line (struct ast_channel *chan, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
	Set the connected line information in the Asterisk channel.
void	ast_channel_set_fd (struct ast_channel *chan, int which, int fd)
void	ast_channel_set_linkgroup (struct ast_channel *chan, struct ast_channel *peer)
	propagate the linked id between chan and peer
void	ast_channel_set_redirecting (struct ast_channel *chan, const struct ast_party_redirecting *redirecting, const struct ast_set_party_redirecting *update)
	Set the redirecting id information in the Asterisk channel.
int	ast_channel_setoption (struct ast_channel *channel, int option, void *data, int datalen, int block)
	Sets an option on a channel.
void	ast_channel_setwhentohangup (struct ast_channel *chan, time_t offset)
	Set when to hang a channel up.
void	ast_channel_setwhentohangup_tv (struct ast_channel *chan, struct timeval offset)
	Set when to hang a channel up.
struct ast_silence_generator *	ast_channel_start_silence_generator (struct ast_channel *chan)
	Starts a silence generator on the given channel.
void	ast_channel_stop_silence_generator (struct ast_channel *chan, struct ast_silence_generator *state)
	Stops a previously-started silence generator on the given channel.
int	ast_channel_supports_html (struct ast_channel *channel)
	Checks for HTML support on a channel.
int	ast_channel_transfer_masquerade (struct ast_channel *target_chan, const struct ast_party_connected_line *target_id, int target_held, struct ast_channel *transferee_chan, const struct ast_party_connected_line *transferee_id, int transferee_held)
	Setup a masquerade to transfer a call.
void	ast_channel_undefer_dtmf (struct ast_channel *chan)
	Unset defer DTMF flag on channel.
void	ast_channel_unregister (const struct ast_channel_tech *tech)
	Unregister a channel technology.
void	ast_channel_update_connected_line (struct ast_channel *chan, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
	Indicate that the connected line information has changed.
void	ast_channel_update_redirecting (struct ast_channel *chan, const struct ast_party_redirecting *redirecting, const struct ast_set_party_redirecting *update)
	Indicate that the redirecting id has changed.
struct ast_variable *	ast_channeltype_list (void)
	return an ast_variable list of channeltypes
int	ast_check_hangup (struct ast_channel *chan)
	Check to see if a channel is needing hang up.
int	ast_check_hangup_locked (struct ast_channel *chan)
int	ast_connected_line_build_data (unsigned char *data, size_t datalen, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
	Build the connected line information data frame.
void	ast_connected_line_copy_from_caller (struct ast_party_connected_line *dest, const struct ast_party_caller *src)
	Copy the caller information to the connected line information.
void	ast_connected_line_copy_to_caller (struct ast_party_caller *dest, const struct ast_party_connected_line *src)
	Copy the connected line information to the caller information.
int	ast_connected_line_parse_data (const unsigned char *data, size_t datalen, struct ast_party_connected_line *connected)
	Parse connected line indication frame data.
void	ast_deactivate_generator (struct ast_channel *chan)
int	ast_do_masquerade (struct ast_channel *chan)
	Start masquerading a channel.
static int	ast_fdisset (struct pollfd *pfds, int fd, int maximum, int *start)
	Helper function for migrating select to poll.
struct ast_channel_tech *	ast_get_channel_tech (const char *name)
	Get a channel technology structure by name.
ast_group_t	ast_get_group (const char *s)
int	ast_hangup (struct ast_channel *chan)
	Hang up a channel.
int	ast_indicate (struct ast_channel *chan, int condition)
	Indicates condition of channel.
int	ast_indicate_data (struct ast_channel *chan, int condition, const void *data, size_t datalen)
	Indicates condition of channel, with payload.
int	ast_internal_timing_enabled (struct ast_channel *chan)
	Check if the channel can run in internal timing mode.
int	ast_is_deferrable_frame (const struct ast_frame *frame)
	Should we keep this frame for later?
void	ast_party_caller_copy (struct ast_party_caller *dest, const struct ast_party_caller *src)
	Copy the source caller information to the destination caller.
void	ast_party_caller_free (struct ast_party_caller *doomed)
	Destroy the caller party contents.
void	ast_party_caller_init (struct ast_party_caller *init)
	Initialize the given caller structure.
void	ast_party_caller_set (struct ast_party_caller *dest, const struct ast_party_caller *src, const struct ast_set_party_caller *update)
	Set the caller information based on another caller source.
void	ast_party_caller_set_init (struct ast_party_caller *init, const struct ast_party_caller *guide)
	Initialize the given caller structure using the given guide for a set update operation.
void	ast_party_connected_line_collect_caller (struct ast_party_connected_line *connected, struct ast_party_caller *caller)
	Collect the caller party information into a connected line structure.
void	ast_party_connected_line_copy (struct ast_party_connected_line *dest, const struct ast_party_connected_line *src)
	Copy the source connected line information to the destination connected line.
void	ast_party_connected_line_free (struct ast_party_connected_line *doomed)
	Destroy the connected line information contents.
void	ast_party_connected_line_init (struct ast_party_connected_line *init)
	Initialize the given connected line structure.
void	ast_party_connected_line_set (struct ast_party_connected_line *dest, const struct ast_party_connected_line *src, const struct ast_set_party_connected_line *update)
	Set the connected line information based on another connected line source.
void	ast_party_connected_line_set_init (struct ast_party_connected_line *init, const struct ast_party_connected_line *guide)
	Initialize the given connected line structure using the given guide for a set update operation.
void	ast_party_dialed_copy (struct ast_party_dialed *dest, const struct ast_party_dialed *src)
	Copy the source dialed party information to the destination dialed party.
void	ast_party_dialed_free (struct ast_party_dialed *doomed)
	Destroy the dialed party contents.
void	ast_party_dialed_init (struct ast_party_dialed *init)
	Initialize the given dialed structure.
void	ast_party_dialed_set (struct ast_party_dialed *dest, const struct ast_party_dialed *src)
	Set the dialed information based on another dialed source.
void	ast_party_dialed_set_init (struct ast_party_dialed *init, const struct ast_party_dialed *guide)
	Initialize the given dialed structure using the given guide for a set update operation.
void	ast_party_id_copy (struct ast_party_id *dest, const struct ast_party_id *src)
	Copy the source party id information to the destination party id.
void	ast_party_id_free (struct ast_party_id *doomed)
	Destroy the party id contents.
void	ast_party_id_init (struct ast_party_id *init)
	Initialize the given party id structure.
int	ast_party_id_presentation (const struct ast_party_id *id)
	Determine the overall presentation value for the given party.
void	ast_party_id_set (struct ast_party_id *dest, const struct ast_party_id *src, const struct ast_set_party_id *update)
	Set the source party id information into the destination party id.
void	ast_party_id_set_init (struct ast_party_id *init, const struct ast_party_id *guide)
	Initialize the given party id structure using the given guide for a set update operation.
void	ast_party_name_copy (struct ast_party_name *dest, const struct ast_party_name *src)
	Copy the source party name information to the destination party name.
void	ast_party_name_free (struct ast_party_name *doomed)
	Destroy the party name contents.
void	ast_party_name_init (struct ast_party_name *init)
	Initialize the given name structure.
void	ast_party_name_set (struct ast_party_name *dest, const struct ast_party_name *src)
	Set the source party name information into the destination party name.
void	ast_party_name_set_init (struct ast_party_name *init, const struct ast_party_name *guide)
	Initialize the given party name structure using the given guide for a set update operation.
void	ast_party_number_copy (struct ast_party_number *dest, const struct ast_party_number *src)
	Copy the source party number information to the destination party number.
void	ast_party_number_free (struct ast_party_number *doomed)
	Destroy the party number contents.
void	ast_party_number_init (struct ast_party_number *init)
	Initialize the given number structure.
void	ast_party_number_set (struct ast_party_number *dest, const struct ast_party_number *src)
	Set the source party number information into the destination party number.
void	ast_party_number_set_init (struct ast_party_number *init, const struct ast_party_number *guide)
	Initialize the given party number structure using the given guide for a set update operation.
void	ast_party_redirecting_copy (struct ast_party_redirecting *dest, const struct ast_party_redirecting *src)
	Copy the source redirecting information to the destination redirecting.
void	ast_party_redirecting_free (struct ast_party_redirecting *doomed)
	Destroy the redirecting information contents.
void	ast_party_redirecting_init (struct ast_party_redirecting *init)
	Initialize the given redirecting structure.
void	ast_party_redirecting_set (struct ast_party_redirecting *dest, const struct ast_party_redirecting *src, const struct ast_set_party_redirecting *update)
	Set the redirecting information based on another redirecting source.
void	ast_party_redirecting_set_init (struct ast_party_redirecting *init, const struct ast_party_redirecting *guide)
	Initialize the given redirecting id structure using the given guide for a set update operation.
void	ast_party_subaddress_copy (struct ast_party_subaddress *dest, const struct ast_party_subaddress *src)
	Copy the source party subaddress information to the destination party subaddress.
void	ast_party_subaddress_free (struct ast_party_subaddress *doomed)
	Destroy the party subaddress contents.
void	ast_party_subaddress_init (struct ast_party_subaddress *init)
	Initialize the given subaddress structure.
void	ast_party_subaddress_set (struct ast_party_subaddress *dest, const struct ast_party_subaddress *src)
	Set the source party subaddress information into the destination party subaddress.
void	ast_party_subaddress_set_init (struct ast_party_subaddress *init, const struct ast_party_subaddress *guide)
	Initialize the given party subaddress structure using the given guide for a set update operation.
void	ast_poll_channel_add (struct ast_channel *chan0, struct ast_channel *chan1)
void	ast_poll_channel_del (struct ast_channel *chan0, struct ast_channel *chan1)
char *	ast_print_group (char *buf, int buflen, ast_group_t group)
	print call- and pickup groups into buffer
int	ast_prod (struct ast_channel *chan)
	Send empty audio to prime a channel driver.
int	ast_queue_control (struct ast_channel *chan, enum ast_control_frame_type control)
	Queue a control frame with payload.
int	ast_queue_control_data (struct ast_channel *chan, enum ast_control_frame_type control, const void *data, size_t datalen)
	Queue a control frame with payload.
int	ast_queue_frame (struct ast_channel *chan, struct ast_frame *f)
	Queue one or more frames to a channel's frame queue.
int	ast_queue_frame_head (struct ast_channel *chan, struct ast_frame *f)
	Queue one or more frames to the head of a channel's frame queue.
int	ast_queue_hangup (struct ast_channel *chan)
	Queue a hangup frame.
int	ast_queue_hangup_with_cause (struct ast_channel *chan, int cause)
	Queue a hangup frame with hangupcause set.
int	ast_raw_answer (struct ast_channel *chan, int cdr_answer)
	Answer a channel.
struct ast_frame *	ast_read (struct ast_channel *chan)
	Reads a frame.
struct ast_frame *	ast_read_noaudio (struct ast_channel *chan)
	Reads a frame, returning AST_FRAME_NULL frame if audio.
int	ast_readstring (struct ast_channel *c, char *s, int len, int timeout, int rtimeout, char *enders)
	Reads multiple digits.
int	ast_readstring_full (struct ast_channel *c, char *s, int len, int timeout, int rtimeout, char *enders, int audiofd, int ctrlfd)
int	ast_recvchar (struct ast_channel *chan, int timeout)
	Receives a text character from a channel.
char *	ast_recvtext (struct ast_channel *chan, int timeout)
	Receives a text string from a channel Read a string of text from a channel.
int	ast_redirecting_build_data (unsigned char *data, size_t datalen, const struct ast_party_redirecting *redirecting, const struct ast_set_party_redirecting *update)
	Build the redirecting id data frame.
int	ast_redirecting_parse_data (const unsigned char *data, size_t datalen, struct ast_party_redirecting *redirecting)
	Parse redirecting indication frame data.
struct ast_channel *	ast_request (const char *type, format_t format, const struct ast_channel *requestor, void *data, int *status)
	Requests a channel.
struct ast_channel *	ast_request_and_dial (const char *type, format_t format, const struct ast_channel *requestor, void *data, int timeout, int *reason, const char *cid_num, const char *cid_name)
	Request a channel of a given type, with data as optional information used by the low level module and attempt to place a call on it.
int	ast_safe_sleep (struct ast_channel *chan, int ms)
	Wait for a specified amount of time, looking for hangups.
int	ast_safe_sleep_conditional (struct ast_channel *chan, int ms, int(*cond)(void *), void *data)
	Wait for a specified amount of time, looking for hangups and a condition argument.
int	ast_senddigit (struct ast_channel *chan, char digit, unsigned int duration)
	Send a DTMF digit to a channel.
int	ast_senddigit_begin (struct ast_channel *chan, char digit)
	Send a DTMF digit to a channel.
int	ast_senddigit_end (struct ast_channel *chan, char digit, unsigned int duration)
	Send a DTMF digit to a channel.
int	ast_sendtext (struct ast_channel *chan, const char *text)
	Sends text to a channel.
void	ast_set_callerid (struct ast_channel *chan, const char *cid_num, const char *cid_name, const char *cid_ani)
	Set caller ID number, name and ANI and generate AMI event.
void	ast_set_hangupsource (struct ast_channel *chan, const char *source, int force)
	Set the source of the hangup in this channel and it's bridge.
int	ast_set_read_format (struct ast_channel *chan, format_t format)
	Sets read format on channel chan Set read format for channel to whichever component of "format" is best.
void	ast_set_variables (struct ast_channel *chan, struct ast_variable *vars)
	adds a list of channel variables to a channel
int	ast_set_write_format (struct ast_channel *chan, format_t format)
	Sets write format on channel chan Set write format for channel to whichever component of "format" is best.
int	ast_settimeout (struct ast_channel *c, unsigned int rate, int(*func)(const void *data), void *data)
	Enable or disable timer ticks for a channel.
int	ast_shutting_down (void)
	Returns non-zero if Asterisk is being shut down.
int	ast_softhangup (struct ast_channel *chan, int reason)
	Softly hangup up a channel.
int	ast_softhangup_nolock (struct ast_channel *chan, int reason)
	Softly hangup up a channel (no channel lock).
const char *	ast_state2str (enum ast_channel_state)
	Gives the string form of a given channel state.
int	ast_str2cause (const char *name) attribute_pure
	Convert the string form of a cause code to a number.
int	ast_tonepair (struct ast_channel *chan, int freq1, int freq2, int duration, int vol)
int	ast_tonepair_start (struct ast_channel *chan, int freq1, int freq2, int duration, int vol)
void	ast_tonepair_stop (struct ast_channel *chan)
int	ast_transfer (struct ast_channel *chan, char *dest)
	Transfer a channel (if supported).
char *	ast_transfercapability2str (int transfercapability) attribute_const
	Gives the string form of a given transfer capability.
int	ast_undestroyed_channels (void)
int	ast_waitfor (struct ast_channel *chan, int ms)
	Wait for input on a channel.
struct ast_channel *	ast_waitfor_n (struct ast_channel **chan, int n, int *ms)
	Waits for input on a group of channels Wait for input on an array of channels for a given # of milliseconds.
int	ast_waitfor_n_fd (int *fds, int n, int *ms, int *exception)
	Waits for input on an fd.
struct ast_channel *	ast_waitfor_nandfds (struct ast_channel **chan, int n, int *fds, int nfds, int *exception, int *outfd, int *ms)
	Waits for activity on a group of channels.
int	ast_waitfordigit (struct ast_channel *c, int ms)
	Waits for a digit.
int	ast_waitfordigit_full (struct ast_channel *c, int ms, int audiofd, int ctrlfd)
	Wait for a digit Same as ast_waitfordigit() with audio fd for outputting read audio and ctrlfd to monitor for reading.
int	ast_write (struct ast_channel *chan, struct ast_frame *frame)
	Write a frame to a channel This function writes the given frame to the indicated channel.
int	ast_write_text (struct ast_channel *chan, struct ast_frame *frame)
	Write text frame to a channel This function writes the given frame to the indicated channel.
int	ast_write_video (struct ast_channel *chan, struct ast_frame *frame)
	Write video frame to a channel This function writes the given frame to the indicated channel.
const char *	channelreloadreason2txt (enum channelreloadreason reason)
	Convert enum channelreloadreason to text string for manager event.
struct ast_channel *	ast_channel_get_by_exten (const char *exten, const char *context)
	Find a channel by extension and context.
struct ast_channel *	ast_channel_get_by_name (const char *name)
	Find a channel by name.
struct ast_channel *	ast_channel_get_by_name_prefix (const char *name, size_t name_len)
	Find a channel by a name prefix.
struct ast_channel_iterator *	ast_channel_iterator_all_new (void)
	Create a new channel iterator.
struct ast_channel_iterator *	ast_channel_iterator_by_exten_new (const char *exten, const char *context)
	Create a new channel iterator based on extension.
struct ast_channel_iterator *	ast_channel_iterator_by_name_new (const char *name, size_t name_len)
	Create a new channel iterator based on name.
struct ast_channel_iterator *	ast_channel_iterator_destroy (struct ast_channel_iterator *i)
	Destroy a channel iterator.
struct ast_channel *	ast_channel_iterator_next (struct ast_channel_iterator *i)
	Get the next channel for a channel iterator.
Variables
struct ast_channel_tech	ast_kill_tech
unsigned long	global_fin
unsigned long	global_fout

---

Detailed Description

General Asterisk PBX channel definitions.

See also:

• Asterisk Channels
• Module: Asterisk Channel Drivers

Definition in file channel.h.

---

Define Documentation

#define AST_AGENT_FD   (AST_MAX_FDS-3)

used by agents for pass through

Definition at line 165 of file channel.h.

Referenced by agent_read().

#define AST_ALERT_FD   (AST_MAX_FDS-1)

used for alertpipe

Definition at line 163 of file channel.h.

Referenced by __ast_channel_alloc_ap().

#define AST_BRIDGE_DTMF_CHANNEL_0   (1 << 0)

Report DTMF on channel 0.

Definition at line 1928 of file channel.h.

Referenced by ast_generic_bridge(), ast_rtp_instance_bridge(), dahdi_bridge(), iax2_bridge(), local_bridge_loop(), misdn_bridge(), remote_bridge_loop(), and set_config_flags().

#define AST_BRIDGE_DTMF_CHANNEL_1   (1 << 1)

Report DTMF on channel 1.

Definition at line 1930 of file channel.h.

Referenced by ast_generic_bridge(), ast_rtp_instance_bridge(), dahdi_bridge(), iax2_bridge(), local_bridge_loop(), misdn_bridge(), remote_bridge_loop(), and set_config_flags().

#define AST_BRIDGE_IGNORE_SIGS   (1 << 4)

Ignore all signal frames except NULL.

Definition at line 1936 of file channel.h.

Referenced by ast_generic_bridge(), iax2_bridge(), local_bridge_loop(), and remote_bridge_loop().

#define AST_BRIDGE_REC_CHANNEL_0   (1 << 2)

Return all voice frames on channel 0.

Definition at line 1932 of file channel.h.

#define AST_BRIDGE_REC_CHANNEL_1   (1 << 3)

Return all voice frames on channel 1.

Definition at line 1934 of file channel.h.

#define AST_CHAN_WRITE_INFO_T_VERSION   1

ast_chan_write_info_t version. Must be incremented if structure is changed

Definition at line 484 of file channel.h.

Referenced by func_channel_write(), and local_setoption().

#define ast_channel_alloc	(	needqueue,
		state,
		cid_num,
		cid_name,
		acctcode,
		exten,
		context,
		linkedid,
		amaflag,
		...		)

Value:

__ast_channel_alloc(needqueue, state, cid_num, cid_name, acctcode, exten, context, linkedid, amaflag, \
             __FILE__, __LINE__, __FUNCTION__, __VA_ARGS__)

Create a channel structure.

Return values:

	NULL	failure
	non-NULL	successfully allocated channel

Note:

Absolutely _NO_ channel locks should be held before calling this function.

By default, new channels are set to the "s" extension and "default" context.

Definition at line 1150 of file channel.h.

Referenced by __oh323_new(), action_bridge(), agent_new(), alsa_new(), ast_async_goto(), ast_iax2_new(), ast_pbx_outgoing_exten(), bridge_exec(), bridge_request(), builtin_atxfer(), check_goto_on_transfer(), console_new(), dahdi_new(), do_notify(), gtalk_new(), iax_park(), jingle_new(), local_new(), masq_park_call(), mgcp_new(), misdn_new(), multicast_rtp_request(), nbs_new(), oss_new(), phone_new(), sip_new(), sip_park(), skinny_new(), and unistim_new().

#define ast_channel_lock

(

chan

)

ao2_lock(chan)

Definition at line 2461 of file channel.h.

Referenced by __analog_handle_event(), __ast_answer(), __ast_pbx_run(), __ast_queue_frame(), __ast_read(), __ast_request_and_dial(), __dahdi_exception(), __oh323_destroy(), __sip_destroy(), _macro_exec(), _while_exec(), acf_cc_read(), acf_cc_write(), acf_fetch(), acf_odbc_read(), action_add_agi_cmd(), action_coreshowchannels(), action_hangup(), action_redirect(), action_status(), action_timeout(), add_features_datastore(), add_to_agi(), agent_indicate(), agent_lock_owner(), analog_exception(), app_exec(), ast_activate_generator(), ast_async_goto(), ast_audiohook_attach(), ast_audiohook_detach_source(), ast_audiohook_remove(), ast_audiohook_set_mute(), ast_autochan_destroy(), ast_autochan_setup(), ast_autoservice_start(), ast_autoservice_stop(), ast_bridge_call(), ast_bridge_end_dtmf(), ast_bridge_timelimit(), ast_call(), ast_call_forward(), ast_cc_agent_set_interfaces_chanvar(), ast_cc_call_init(), ast_cc_completed(), ast_cc_extension_monitor_add_dialstring(), ast_cc_get_current_core_id(), ast_cc_is_recall(), ast_cc_offer(), ast_cel_report_event(), ast_change_name(), ast_channel_clear_softhangup(), ast_channel_cmp_cb(), ast_channel_connected_line_macro(), ast_channel_destructor(), ast_channel_queryoption(), ast_channel_redirecting_macro(), ast_channel_set_caller(), ast_channel_set_caller_event(), ast_channel_set_connected_line(), ast_channel_set_redirecting(), ast_channel_setoption(), ast_check_hangup_locked(), ast_complete_channels(), ast_deactivate_generator(), ast_dial_join(), ast_do_masquerade(), ast_do_pickup(), ast_eivr_getvariable(), ast_explicit_goto(), ast_handle_cc_control_frame(), ast_hangup(), ast_ignore_cc(), ast_indicate_data(), ast_odbc_retrieve_transaction_obj(), ast_pbx_outgoing_app(), ast_pbx_outgoing_exten(), ast_raw_answer(), ast_read_generator_actions(), ast_rtp_instance_bridge(), ast_rtp_instance_early_bridge(), ast_rtp_instance_early_bridge_make_compatible(), ast_rtp_instance_make_compatible(), ast_safe_sleep_conditional(), ast_senddigit_begin(), ast_senddigit_end(), ast_sendtext(), ast_set_callerid(), ast_set_cc_interfaces_chanvar(), ast_set_hangupsource(), ast_settimeout(), ast_setup_cc_recall_datastore(), ast_softhangup(), ast_stopstream(), ast_str_retrieve_variable(), ast_transfer(), ast_udptl_bridge(), ast_var_channel_bridge(), ast_var_channels_table(), ast_waitfor_nandfds(), ast_write(), auth_exec(), awesome_locking(), bridge_play_sounds(), builtin_atxfer(), builtin_automixmonitor(), builtin_blindtransfer(), calendar_event_read(), calendar_query_exec(), calendar_query_result_exec(), call_forward_inherit(), callerid_read(), callerid_write(), cb_events(), cc_build_payload(), cc_interfaces_datastore_init(), cdr_read(), cdr_write(), channel_set_debug(), channel_spy(), check_bridge(), check_goto_on_transfer(), clear_caller(), clear_dialed_interfaces(), common_exec(), conf_run(), conf_start_moh(), confbridge_exec(), connectedline_read(), connectedline_write(), create_dynamic_parkinglot(), crement_function_read(), dahdi_bridge(), dahdi_handle_dtmf(), dahdi_handle_event(), data_channels_provider_handler(), dial_exec_full(), disable_jack_hook(), do_forward(), do_notify(), dundi_query_read(), dundi_result_read(), enable_jack_hook(), end_bridge_callback(), enum_query_read(), enum_result_read(), exec_odbcfinish(), feature_check(), feature_interpret(), feature_request_and_dial(), find_by_mark(), find_by_part(), find_calling_channel(), find_channel_by_group(), find_conf_realtime(), find_details(), find_or_create_details(), find_transaction(), findmeexec(), frame_trace_helper(), func_channel_read(), func_channel_write_real(), func_channels_read(), func_header_read(), func_inheritance_write(), func_mute_write(), function_agent(), function_sipchaninfo_read(), generator_force(), generic_fax_exec(), get_agi_cmd(), get_cid_name(), gosub_exec(), handle_chanlist(), handle_cli_agi_add_cmd(), handle_cli_mixmonitor(), handle_invite_replaces(), handle_request_bye(), handle_request_refer(), handle_showchan(), handle_softhangup(), import_ch(), import_helper(), init_jack_data(), internal_deactivate_generator(), jack_hook_callback(), leave_voicemail(), listfilter(), local_ast_moh_stop(), local_call(), local_hangup(), local_queryoption(), local_queue_frame(), local_read(), local_setoption(), local_write(), login_exec(), lua_get_state(), manage_parked_call(), manager_mutestream(), mark_transaction_active(), meetme_menu_admin_extended(), minivm_delete_exec(), minivm_notify_exec(), misdn_answer(), misdn_attempt_transfer(), misdn_update_caller_id(), moh_files_generator(), morsecode_exec(), mute_callback(), my_handle_dtmf(), notify_new_message(), park_call_full(), parkandannounce_exec(), parked_call_exec(), pbx_builtin_background(), pbx_builtin_getvar_helper(), pbx_builtin_gotoiftime(), pbx_builtin_pushvar_helper(), pbx_builtin_serialize_variables(), pbx_builtin_setamaflags(), pbx_builtin_setvar_helper(), peek_read(), pickup_by_exten(), pickup_by_name_cb(), pitchshift_helper(), pop_exec(), process_sdp(), queue_exec(), receivefax_exec(), redirecting_read(), redirecting_write(), release_transaction(), report_fax_status(), retrydial_exec(), return_exec(), run_agi(), sendfax_exec(), sendtext_exec(), set_ext_pri(), set_format(), set_security_requirements(), setup_inheritance_datastore(), setup_mixmonitor_ds(), setup_transfer_datastore(), shared_read(), shared_write(), sip_addheader(), sip_dtmfmode(), sip_new(), sip_pvt_lock_full(), sip_read(), sip_removeheader(), sip_set_rtp_peer(), sip_set_udptl_peer(), smdi_msg_read(), smdi_msg_retrieve_read(), softhangup_exec(), speech_background(), speex_read(), speex_write(), srv_datastore_setup(), srv_query_read(), srv_result_read(), stackpeek_read(), start_monitor_action(), start_monitor_exec(), state_notify_build_xml(), stop_mixmonitor_exec(), transmit_invite(), try_calling(), update_bridge_vars(), volume_write(), and wait_for_answer().

#define ast_channel_lock_both	(	chan1,
		chan2		)

Lock two channels.

Definition at line 2468 of file channel.h.

Referenced by __ast_channel_masquerade(), __ast_request_and_dial(), ast_bridge_call(), ast_call_forward(), ast_channel_bridge(), ast_do_masquerade(), ast_generic_bridge(), call_forward_inherit(), dial_transfer(), do_bridge_masquerade(), do_forward(), findmeexec(), ring_entry(), and wait_for_answer().

#define AST_CHANNEL_NAME   80

Max length of an ast_channel name

Definition at line 137 of file channel.h.

Referenced by ast_bridge_call(), ast_cc_call_failed(), ast_cc_is_recall(), ast_channel_destructor(), ast_do_masquerade(), ast_parse_device_state(), ast_queue_cc_frame(), ast_setstate(), cc_core_init_instance(), cc_unique_append(), cccancel_exec(), ccreq_exec(), common_exec(), create_jb(), dahdi_cc_callback(), dahdi_new(), dial_exec_full(), fast_originate(), page_exec(), park_call_full(), sip_call(), sip_handle_cc(), softhangup_exec(), and wait_for_answer().

#define ast_channel_ref

(

c

)

({ ao2_ref(c, +1); (c); })

Increase channel reference count.

Parameters:

c

the channel

Return values:

c

always

Since:

1.8

Definition at line 2486 of file channel.h.

Referenced by agent_hangup(), agent_lock_owner(), ast_autochan_new_channel(), ast_autochan_setup(), ast_cel_report_event(), ast_do_masquerade(), ast_set_hangupsource(), awesome_locking(), check_bridge(), handle_getvariablefull(), handle_incoming(), handle_invite_replaces(), handle_request_refer(), local_attended_transfer(), local_queryoption(), local_queue_frame(), local_setoption(), set_hangup_source_and_cause(), sip_pickup(), sip_pvt_lock_full(), sip_queue_hangup_cause(), and socket_process().

#define ast_channel_trylock

(

chan

)

ao2_trylock(chan)

Definition at line 2463 of file channel.h.

Referenced by __ast_channel_masquerade(), __oh323_rtp_create(), agent_logoff(), agent_read(), analog_lock_sub_owner(), ast_queue_hangup(), ast_queue_hangup_with_cause(), ast_rtp_instance_bridge(), ast_rtp_instance_early_bridge(), ast_rtp_instance_early_bridge_make_compatible(), ast_udptl_bridge(), ast_write(), auto_congest(), awesome_locking(), bridge_queue_hangup(), bridge_write(), check_bridge(), check_rtp_timeout(), cleanup_connection(), dahdi_bridge(), dahdi_handle_event(), dahdi_lock_sub_owner(), dahdi_queue_frame(), dahdi_softhangup_all(), dial_exec_full(), get_sip_pvt_byid_locked(), grab_owner(), handle_request_bye(), hangup_connection(), iax2_destroy(), iax2_lock_owner(), mgcp_queue_frame(), mgcp_queue_hangup(), misdn_attempt_transfer(), oh323_rtp_read(), oh323_simulate_dtmf_end(), proc_session_timer(), receive_digit(), release_chan(), release_chan_early(), remote_hold(), retrans_pkt(), setup_rtp_connection(), sip_hangup(), sip_reinvite_retry(), and update_state().

#define ast_channel_unlock

(

chan

)

ao2_unlock(chan)

Definition at line 2462 of file channel.h.

Referenced by __analog_handle_event(), __ast_answer(), __ast_channel_masquerade(), __ast_pbx_run(), __ast_queue_frame(), __ast_read(), __ast_request_and_dial(), __dahdi_exception(), __oh323_destroy(), __oh323_rtp_create(), __sip_autodestruct(), __sip_destroy(), _macro_exec(), _while_exec(), acf_cc_read(), acf_cc_write(), acf_fetch(), acf_odbc_read(), action_add_agi_cmd(), action_agents(), action_coreshowchannels(), action_hangup(), action_redirect(), action_status(), action_timeout(), add_features_datastore(), add_to_agi(), agent_indicate(), agent_lock_owner(), agent_logoff(), agent_read(), agents_data_provider_get(), agents_show(), agents_show_online(), alsa_call(), analog_attempt_transfer(), analog_exception(), analog_hangup(), app_exec(), ast_activate_generator(), ast_async_goto(), ast_audiohook_attach(), ast_audiohook_detach_source(), ast_audiohook_remove(), ast_audiohook_set_mute(), ast_autochan_destroy(), ast_autochan_setup(), ast_autoservice_start(), ast_autoservice_stop(), ast_bridge_call(), ast_bridge_end_dtmf(), ast_bridge_timelimit(), ast_call(), ast_call_forward(), ast_cc_agent_set_interfaces_chanvar(), ast_cc_call_init(), ast_cc_completed(), ast_cc_extension_monitor_add_dialstring(), ast_cc_get_current_core_id(), ast_cc_is_recall(), ast_cc_offer(), ast_cel_report_event(), ast_change_name(), ast_channel_bridge(), ast_channel_clear_softhangup(), ast_channel_cmp_cb(), ast_channel_connected_line_macro(), ast_channel_destructor(), ast_channel_queryoption(), ast_channel_redirecting_macro(), ast_channel_set_caller(), ast_channel_set_caller_event(), ast_channel_set_connected_line(), ast_channel_set_redirecting(), ast_channel_setoption(), ast_check_hangup_locked(), ast_complete_channels(), ast_deactivate_generator(), ast_dial_join(), ast_do_masquerade(), ast_do_pickup(), ast_eivr_getvariable(), ast_explicit_goto(), ast_generic_bridge(), ast_handle_cc_control_frame(), ast_hangup(), ast_ignore_cc(), ast_indicate_data(), ast_odbc_retrieve_transaction_obj(), ast_pbx_outgoing_app(), ast_pbx_outgoing_exten(), ast_pickup_call(), ast_queue_hangup(), ast_queue_hangup_with_cause(), ast_raw_answer(), ast_read_generator_actions(), ast_rtp_instance_bridge(), ast_rtp_instance_early_bridge(), ast_rtp_instance_early_bridge_make_compatible(), ast_rtp_instance_make_compatible(), ast_safe_sleep_conditional(), ast_senddigit_begin(), ast_senddigit_end(), ast_sendtext(), ast_set_callerid(), ast_set_cc_interfaces_chanvar(), ast_set_hangupsource(), ast_settimeout(), ast_setup_cc_recall_datastore(), ast_softhangup(), ast_stopstream(), ast_str_retrieve_variable(), ast_transfer(), ast_udptl_bridge(), ast_var_channel_bridge(), ast_var_channels_table(), ast_waitfor_nandfds(), ast_write(), attempt_transfer(), auth_exec(), auto_congest(), awesome_locking(), bridge_play_sounds(), bridge_queue_hangup(), bridge_write(), builtin_atxfer(), builtin_automixmonitor(), builtin_blindtransfer(), calendar_event_read(), calendar_query_exec(), calendar_query_result_exec(), call_forward_inherit(), callerid_read(), callerid_write(), cb_events(), cc_build_payload(), cc_interfaces_datastore_init(), cdr_read(), cdr_write(), channel_set_debug(), channel_spy(), check_bridge(), check_goto_on_transfer(), check_rtp_timeout(), cleanup_connection(), clear_caller(), clear_dialed_interfaces(), common_exec(), conf_run(), conf_start_moh(), confbridge_exec(), connectedline_read(), connectedline_write(), console_answer(), console_hangup(), console_sendtext(), create_dynamic_parkinglot(), crement_function_read(), dahdi_bridge(), dahdi_handle_dtmf(), dahdi_handle_event(), dahdi_queue_frame(), dahdi_softhangup_all(), data_channels_provider_handler(), dial_exec_full(), dial_transfer(), dialog_unlink_all(), disable_jack_hook(), do_bridge_masquerade(), do_forward(), do_notify(), dundi_query_read(), dundi_result_read(), enable_jack_hook(), end_bridge_callback(), enum_query_read(), enum_result_read(), exec_odbcfinish(), fast_originate(), feature_check(), feature_interpret(), feature_request_and_dial(), find_by_mark(), find_by_part(), find_calling_channel(), find_channel_by_group(), find_conf_realtime(), find_details(), find_or_create_details(), find_transaction(), findmeexec(), frame_trace_helper(), func_channel_read(), func_channel_write_real(), func_channels_read(), func_header_read(), func_inheritance_write(), func_mute_write(), function_agent(), function_sipchaninfo_read(), generator_force(), generic_fax_exec(), get_agi_cmd(), get_cid_name(), gosub_exec(), handle_chanlist(), handle_cli_agi_add_cmd(), handle_cli_mixmonitor(), handle_incoming(), handle_invite_replaces(), handle_request_bye(), handle_request_do(), handle_request_invite(), handle_request_refer(), handle_showchan(), handle_softhangup(), hangup_connection(), iax2_destroy(), iax2_queue_control_data(), iax2_queue_frame(), iax2_queue_hangup(), import_ch(), import_helper(), init_jack_data(), internal_deactivate_generator(), jack_hook_callback(), leave_voicemail(), listfilter(), local_ast_moh_stop(), local_attended_transfer(), local_bridge_loop(), local_call(), local_hangup(), local_queryoption(), local_queue_frame(), local_read(), local_setoption(), local_write(), login_exec(), lua_get_state(), manage_parked_call(), manager_mutestream(), mark_transaction_active(), meetme_menu_admin_extended(), mgcp_pktcgate_remove(), mgcp_queue_frame(), mgcp_queue_hangup(), minivm_delete_exec(), minivm_notify_exec(), misdn_answer(), misdn_attempt_transfer(), misdn_update_caller_id(), moh_files_generator(), morsecode_exec(), mute_callback(), my_handle_dtmf(), notify_new_message(), oh323_rtp_read(), oh323_simulate_dtmf_end(), park_call_full(), parkandannounce_exec(), parked_call_exec(), pbx_builtin_background(), pbx_builtin_getvar_helper(), pbx_builtin_gotoiftime(), pbx_builtin_pushvar_helper(), pbx_builtin_serialize_variables(), pbx_builtin_setamaflags(), pbx_builtin_setvar_helper(), peek_read(), pickup_by_channel(), pickup_by_exten(), pickup_by_group(), pickup_by_mark(), pickup_by_name_cb(), pickup_by_part(), pitchshift_helper(), pop_exec(), proc_session_timer(), process_sdp(), queue_exec(), receive_digit(), receivefax_exec(), redirecting_read(), redirecting_write(), reinvite_timeout(), release_chan(), release_chan_early(), release_transaction(), remote_bridge_loop(), remote_hold(), report_fax_status(), retrans_pkt(), retrydial_exec(), return_exec(), ring_entry(), run_agi(), schedule_delivery(), send_provisional_keepalive_full(), sendfax_exec(), sendtext_exec(), set_ext_pri(), set_format(), set_hangup_source_and_cause(), set_security_requirements(), setup_inheritance_datastore(), setup_mixmonitor_ds(), setup_rtp_connection(), setup_transfer_datastore(), shared_read(), shared_write(), sip_addheader(), sip_dtmfmode(), sip_hangup(), sip_new(), sip_pvt_lock_full(), sip_queue_hangup_cause(), sip_read(), sip_reinvite_retry(), sip_removeheader(), sip_request_call(), sip_set_rtp_peer(), sip_set_udptl_peer(), smdi_msg_read(), smdi_msg_retrieve_read(), socket_process(), softhangup_exec(), speech_background(), speex_read(), speex_write(), srv_datastore_setup(), srv_query_read(), srv_result_read(), stackpeek_read(), start_monitor_action(), start_monitor_exec(), state_notify_build_xml(), stop_mixmonitor_exec(), transmit_invite(), try_calling(), update_bridge_vars(), update_state(), volume_write(), wait_for_answer(), and wakeup_sub().

#define ast_channel_unref

(

c

)

({ ao2_ref(c, -1); (struct ast_channel *) (NULL); })

Decrease channel reference count.

Parameters:

c

the channel

Return values:

NULL

always

Since:

1.8

Definition at line 2497 of file channel.h.

Referenced by __ast_channel_alloc_ap(), __ast_dummy_channel_alloc(), __sip_autodestruct(), acf_odbc_read(), acf_odbc_write(), action_add_agi_cmd(), action_agents(), action_aocmessage(), action_atxfer(), action_bridge(), action_coreshowchannels(), action_getvar(), action_hangup(), action_redirect(), action_sendtext(), action_setvar(), action_status(), action_timeout(), agent_hangup(), agent_lock_owner(), agent_logoff(), agent_read(), agents_data_provider_get(), agents_show(), agents_show_online(), ast_add_extension2_lockopt(), ast_async_goto_by_name(), ast_autochan_destroy(), ast_autochan_new_channel(), ast_bridge_call(), ast_cel_fabricate_channel_from_event(), ast_cel_report_event(), ast_channel_release(), ast_complete_channels(), ast_do_masquerade(), ast_hangup(), ast_parse_device_state(), ast_pbx_outgoing_cdr_failed(), ast_pickup_call(), ast_set_hangupsource(), ast_str_substitute_variables_full(), ast_var_channel_bridge(), ast_var_channel_types_table(), ast_var_channels_table(), asyncgoto_exec(), awesome_locking(), bridge_exec(), change_monitor_action(), check_bridge(), cli_odbc_read(), cli_odbc_write(), common_exec(), custom_log(), data_channels_provider_handler(), dialog_unlink_all(), do_pause_or_unpause(), func_channels_read(), func_mchan_read(), func_mchan_write(), handle_chanlist(), handle_channelstatus(), handle_cli_agi_add_cmd(), handle_cli_mixmonitor(), handle_core_set_debug_channel(), handle_getvariablefull(), handle_hangup(), handle_incoming(), handle_invite_replaces(), handle_redirect(), handle_request_do(), handle_request_refer(), handle_set_chanvar(), handle_show_chanvar(), handle_showchan(), handle_softhangup(), import_helper(), local_attended_transfer(), local_call(), local_hangup(), local_queryoption(), local_queue_frame(), local_setoption(), make_email_file(), manager_log(), manager_mute_mixmonitor(), manager_mutestream(), manager_optimize_away(), manager_park(), manager_play_dtmf(), next_channel(), park_call_full(), pbx_builtin_importvar(), pbx_substitute_variables_helper_full(), pickup_by_channel(), pickup_by_exten(), pickup_by_group(), pickup_by_mark(), pickup_by_part(), reinvite_timeout(), rotate_file(), send_provisional_keepalive_full(), senddtmf_exec(), sendmail(), sendpage(), set_hangup_source_and_cause(), shared_read(), shared_write(), sip_pickup(), sip_pickup_thread(), sip_pvt_lock_full(), sip_queue_hangup_cause(), socket_process(), softhangup_exec(), start_monitor_action(), state_notify_build_xml(), stop_monitor_action(), syslog_log(), and write_cdr().

 

#define ast_dummy_channel_alloc

(

)

__ast_dummy_channel_alloc(__FILE__, __LINE__, __PRETTY_FUNCTION__)

Create a fake channel structure.

Return values:

	NULL	failure
	non-NULL	successfully allocated channel

Note:

This function should ONLY be used to create a fake channel that can then be populated with data for use in variable substitution when a real channel does not exist.

The created dummy channel should be destroyed by ast_channel_unref(). Using ast_channel_release() needlessly grabs the channel container lock and can cause a deadlock as a result. Also grabbing the channel container lock reduces system performance.

Definition at line 1171 of file channel.h.

Referenced by acf_odbc_read(), acf_odbc_write(), action_getvar(), ast_add_extension2_lockopt(), ast_cel_fabricate_channel_from_event(), ast_pbx_outgoing_cdr_failed(), ast_str_substitute_variables_full(), cli_odbc_read(), cli_odbc_write(), custom_log(), make_email_file(), manager_log(), pbx_substitute_variables_helper_full(), rotate_file(), sendmail(), sendpage(), syslog_log(), and write_cdr().

#define AST_GENERATOR_FD   (AST_MAX_FDS-4)

used by generator

Definition at line 166 of file channel.h.

Referenced by __ast_read(), ast_deactivate_generator(), ast_do_masquerade(), and internal_deactivate_generator().

#define AST_MAX_CONTEXT   80

Max length of a context

Definition at line 136 of file channel.h.

Referenced by _macro_exec(), aji_publish_mwi(), ast_bridge_call(), cleanup_stale_contexts(), common_exec(), conf_run(), config_parse_variables(), dial_transfer(), do_magic_pickup(), gtalk_load_config(), handle_gosub(), handle_request_invite(), handle_statechange(), park_call_full(), parkinglot_activate(), reload_config(), and try_calling().

#define AST_MAX_EXTENSION   80

Max length of an extension

Definition at line 135 of file channel.h.

Referenced by __analog_ss_thread(), __ast_context_destroy(), add_extensions(), advanced_options(), aji_publish_mwi(), analog_ss_thread(), ast_bridge_call(), ast_device_state_changed(), ast_devstate_changed(), ast_ivr_menu_run_internal(), AST_LIST_HEAD_NOLOCK(), begin_dial_channel(), build_device(), cc_extension_monitor_init(), conf_run(), destroy_space(), dial_exec_full(), dial_transfer(), disa_exec(), do_magic_pickup(), dundi_lookup_local(), feature_attended_transfer(), feature_blind_transfer(), find_conf_realtime(), forward_message(), function_enum(), get_destination(), handle_gosub(), handle_request_invite(), handle_statechange(), load_module(), log_exec(), manage_parked_call(), manager_show_dialplan_helper(), mgcp_ss(), park_add_hints(), park_call_exec(), park_call_full(), phone_check_exception(), process_dahdi(), realtime_common(), realtime_switch_common(), show_dialplan_helper(), skinny_extensionstate_cb(), skinny_ss(), sla_build_station(), sla_station_destructor(), speech_background(), state_notify_build_xml(), try_calling(), vm_authenticate(), and vmauthenticate().

#define AST_MAX_FDS   10

Definition at line 158 of file channel.h.

Referenced by ast_channel_destructor(), ast_do_masquerade(), ast_poll_channel_add(), ast_poll_channel_del(), and ast_waitfor_nandfds().

#define AST_TIMING_FD   (AST_MAX_FDS-2)

used for timingfd

Definition at line 164 of file channel.h.

Referenced by __ast_channel_alloc_ap(), __ast_read(), agent_read(), ast_do_masquerade(), and ast_settimeout().

#define CHECK_BLOCKING

(

c

)

Definition at line 2422 of file channel.h.

Referenced by ast_sendtext(), ast_waitfor_nandfds(), ast_write(), dahdi_read(), and phone_read().

#define DATASTORE_INHERIT_FOREVER   INT_MAX

Definition at line 156 of file channel.h.

Referenced by _macro_exec(), acf_iaxvar_write(), add_features_datastore(), ast_channel_datastore_inherit(), ast_iax2_new(), ast_setup_cc_recall_datastore(), authenticate_reply(), calendar_query_exec(), cc_interfaces_datastore_init(), dial_exec_full(), do_notify(), socket_process(), and try_calling().

#define DEBUGCHAN_FLAG   0x80000000

The high bit of the frame count is used as a debug marker, so increments of the counters must be done with care. Please use c->fin = FRAMECOUNT_INC(c->fin) and the same for c->fout.

Definition at line 648 of file channel.h.

Referenced by __ast_read(), ast_write(), channel_set_debug(), handle_core_set_debug_channel(), handle_showchan(), and serialize_showchan().

#define FRAMECOUNT_INC

(

x

)

( ((x) & DEBUGCHAN_FLAG) | (((x)+1) & ~DEBUGCHAN_FLAG) )

Definition at line 651 of file channel.h.

Referenced by __ast_read(), and ast_write().

#define MAX_LANGUAGE   40

Max length of the language setting

Definition at line 138 of file channel.h.

Referenced by ast_readconfig().

#define MAX_MUSICCLASS   80

Max length of the music class setting

Definition at line 139 of file channel.h.

---

Typedef Documentation

typedef int(* ast_acf_read2_fn_t)(struct ast_channel *, const char *, char *, struct ast_str **, ssize_t)

Typedef for a custom read2 function.

Definition at line 476 of file channel.h.

typedef int(* ast_acf_read_fn_t)(struct ast_channel *, const char *, char *, char *, size_t)

Typedef for a custom read function.

Definition at line 473 of file channel.h.

typedef int(* ast_acf_write_fn_t)(struct ast_channel *, const char *, char *, const char *)

Typedef for a custom write function.

Definition at line 479 of file channel.h.

typedef unsigned long long ast_group_t

Definition at line 175 of file channel.h.

---

Enumeration Type Documentation

anonymous enum

ast_channel_tech Properties

Enumerator:

AST_CHAN_TP_WANTSJITTER	Channels have this property if they can accept input with jitter; i.e. most VoIP channels.
AST_CHAN_TP_CREATESJITTER	Channels have this property if they can create jitter; i.e. most VoIP channels.

Definition at line 878 of file channel.h.

     {
   /*!
     * \brief Channels have this property if they can accept input with jitter;
    * i.e. most VoIP channels
    */
   AST_CHAN_TP_WANTSJITTER = (1 << 0),
   /*!
     * \brief Channels have this property if they can create jitter;
    * i.e. most VoIP channels
    */
   AST_CHAN_TP_CREATESJITTER = (1 << 1),
};

anonymous enum

ast_channel flags

Enumerator:

AST_FLAG_DEFER_DTMF	Queue incoming DTMF, to be released when this flag is turned off
AST_FLAG_WRITE_INT	write should be interrupt generator
AST_FLAG_BLOCKING	a thread is blocking on this channel
AST_FLAG_ZOMBIE	This is a zombie channel
AST_FLAG_EXCEPTION	There is an exception pending
AST_FLAG_MOH	Listening to moh XXX anthm promises me this will disappear XXX
AST_FLAG_SPYING	This channel is spying on another channel
AST_FLAG_NBRIDGE	This channel is in a native bridge
AST_FLAG_IN_AUTOLOOP	the channel is in an auto-incrementing dialplan processor, so when ->priority is set, it will get incremented before finding the next priority to run
AST_FLAG_OUTGOING	This is an outgoing call
AST_FLAG_IN_DTMF	A DTMF_BEGIN frame has been read from this channel, but not yet an END
AST_FLAG_EMULATE_DTMF	A DTMF_END was received when not IN_DTMF, so the length of the digit is currently being emulated
AST_FLAG_END_DTMF_ONLY	This is set to tell the channel not to generate DTMF begin frames, and to instead only generate END frames.
AST_FLAG_ANSWERED_ELSEWHERE	Flag to show channels that this call is hangup due to the fact that the call was indeed answered, but in another channel
AST_FLAG_MASQ_NOSTREAM	This flag indicates that on a masquerade, an active stream should not be carried over
AST_FLAG_BRIDGE_HANGUP_RUN	This flag indicates that the hangup exten was run when the bridge terminated, a message aimed at preventing a subsequent hangup exten being run at the pbx_run level
AST_FLAG_BRIDGE_HANGUP_DONT	This flag indicates that the hangup exten should NOT be run when the bridge terminates, this will allow the hangup in the pbx loop to be run instead.
AST_FLAG_DISABLE_WORKAROUNDS	Disable certain workarounds. This reintroduces certain bugs, but allows some non-traditional dialplans (like AGI) to continue to function.
AST_FLAG_DISABLE_DEVSTATE_CACHE	Disable device state event caching. This allows channel drivers to selectively prevent device state events from being cached by certain channels such as anonymous calls which have no persistent represenatation that can be tracked.
AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT	This flag indicates that a dual channel redirect is in progress. The bridge needs to wait until the flag is cleared to continue.

Definition at line 892 of file channel.h.

     {
   /*! Queue incoming DTMF, to be released when this flag is turned off */
   AST_FLAG_DEFER_DTMF =    (1 << 1),
   /*! write should be interrupt generator */
   AST_FLAG_WRITE_INT =     (1 << 2),
   /*! a thread is blocking on this channel */
   AST_FLAG_BLOCKING =      (1 << 3),
   /*! This is a zombie channel */
   AST_FLAG_ZOMBIE =        (1 << 4),
   /*! There is an exception pending */
   AST_FLAG_EXCEPTION =     (1 << 5),
   /*! Listening to moh XXX anthm promises me this will disappear XXX */
   AST_FLAG_MOH =           (1 << 6),
   /*! This channel is spying on another channel */
   AST_FLAG_SPYING =        (1 << 7),
   /*! This channel is in a native bridge */
   AST_FLAG_NBRIDGE =       (1 << 8),
   /*! the channel is in an auto-incrementing dialplan processor,
    *  so when ->priority is set, it will get incremented before
    *  finding the next priority to run */
   AST_FLAG_IN_AUTOLOOP =   (1 << 9),
   /*! This is an outgoing call */
   AST_FLAG_OUTGOING =      (1 << 10),
   /*! A DTMF_BEGIN frame has been read from this channel, but not yet an END */
   AST_FLAG_IN_DTMF =       (1 << 12),
   /*! A DTMF_END was received when not IN_DTMF, so the length of the digit is
    *  currently being emulated */
   AST_FLAG_EMULATE_DTMF =  (1 << 13),
   /*! This is set to tell the channel not to generate DTMF begin frames, and
    *  to instead only generate END frames. */
   AST_FLAG_END_DTMF_ONLY = (1 << 14),
   /*! Flag to show channels that this call is hangup due to the fact that the call
       was indeed answered, but in another channel */
   AST_FLAG_ANSWERED_ELSEWHERE = (1 << 15),
   /*! This flag indicates that on a masquerade, an active stream should not
    *  be carried over */
   AST_FLAG_MASQ_NOSTREAM = (1 << 16),
   /*! This flag indicates that the hangup exten was run when the bridge terminated,
    *  a message aimed at preventing a subsequent hangup exten being run at the pbx_run
    *  level */
   AST_FLAG_BRIDGE_HANGUP_RUN = (1 << 17),
   /*! This flag indicates that the hangup exten should NOT be run when the
    *  bridge terminates, this will allow the hangup in the pbx loop to be run instead.
    *  */
   AST_FLAG_BRIDGE_HANGUP_DONT = (1 << 18),
   /*! Disable certain workarounds.  This reintroduces certain bugs, but allows
    *  some non-traditional dialplans (like AGI) to continue to function.
    */
   AST_FLAG_DISABLE_WORKAROUNDS = (1 << 20),
   /*!
    * Disable device state event caching.  This allows channel
    * drivers to selectively prevent device state events from being
    * cached by certain channels such as anonymous calls which have
    * no persistent represenatation that can be tracked.
    */
   AST_FLAG_DISABLE_DEVSTATE_CACHE = (1 << 21),
   /*!
    * This flag indicates that a dual channel redirect is in
    * progress.  The bridge needs to wait until the flag is cleared
    * to continue.
    */
   AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT = (1 << 22),
};

anonymous enum

ast_bridge_config flags

Enumerator:

AST_FEATURE_PLAY_WARNING
AST_FEATURE_REDIRECT
AST_FEATURE_DISCONNECT
AST_FEATURE_ATXFER
AST_FEATURE_AUTOMON
AST_FEATURE_PARKCALL
AST_FEATURE_AUTOMIXMON
AST_FEATURE_NO_H_EXTEN
AST_FEATURE_WARNING_ACTIVE

Definition at line 957 of file channel.h.

     {
   AST_FEATURE_PLAY_WARNING = (1 << 0),
   AST_FEATURE_REDIRECT =     (1 << 1),
   AST_FEATURE_DISCONNECT =   (1 << 2),
   AST_FEATURE_ATXFER =       (1 << 3),
   AST_FEATURE_AUTOMON =      (1 << 4),
   AST_FEATURE_PARKCALL =     (1 << 5),
   AST_FEATURE_AUTOMIXMON =   (1 << 6),
   AST_FEATURE_NO_H_EXTEN =   (1 << 7),
   AST_FEATURE_WARNING_ACTIVE = (1 << 8),
};

anonymous enum

Enumerator:

AST_SOFTHANGUP_DEV	Soft hangup requested by device or other internal reason. Actual hangup needed.
AST_SOFTHANGUP_ASYNCGOTO	Used to break the normal frame flow so an async goto can be done instead of actually hanging up.
AST_SOFTHANGUP_SHUTDOWN	Soft hangup requested by system shutdown. Actual hangup needed.
AST_SOFTHANGUP_TIMEOUT	Used to break the normal frame flow after a timeout so an implicit async goto can be done to the 'T' exten if it exists instead of actually hanging up. If the exten does not exist then actually hangup.
AST_SOFTHANGUP_APPUNLOAD	Soft hangup requested by application/channel-driver being unloaded. Actual hangup needed.
AST_SOFTHANGUP_EXPLICIT	Soft hangup requested by non-associated party. Actual hangup needed.
AST_SOFTHANGUP_UNBRIDGE	Used to break a bridge so the channel can be spied upon instead of actually hanging up.
AST_SOFTHANGUP_ALL	All softhangup flags. This can be used as an argument to ast_channel_softhangup_clear to clear all softhangup flags from a channel.

Definition at line 1005 of file channel.h.

     {
   /*!
    * Soft hangup requested by device or other internal reason.
    * Actual hangup needed.
    */
   AST_SOFTHANGUP_DEV =       (1 << 0),
   /*!
    * Used to break the normal frame flow so an async goto can be
    * done instead of actually hanging up.
    */
   AST_SOFTHANGUP_ASYNCGOTO = (1 << 1),
   /*!
    * Soft hangup requested by system shutdown.  Actual hangup
    * needed.
    */
   AST_SOFTHANGUP_SHUTDOWN =  (1 << 2),
   /*!
    * Used to break the normal frame flow after a timeout so an
    * implicit async goto can be done to the 'T' exten if it exists
    * instead of actually hanging up.  If the exten does not exist
    * then actually hangup.
    */
   AST_SOFTHANGUP_TIMEOUT =   (1 << 3),
   /*!
    * Soft hangup requested by application/channel-driver being
    * unloaded.  Actual hangup needed.
    */
   AST_SOFTHANGUP_APPUNLOAD = (1 << 4),
   /*!
    * Soft hangup requested by non-associated party.  Actual hangup
    * needed.
    */
   AST_SOFTHANGUP_EXPLICIT =  (1 << 5),
   /*!
    * Used to break a bridge so the channel can be spied upon
    * instead of actually hanging up.
    */
   AST_SOFTHANGUP_UNBRIDGE =  (1 << 6),


   /*!
    * \brief All softhangup flags.
    *
    * This can be used as an argument to ast_channel_softhangup_clear
    * to clear all softhangup flags from a channel.
    */
   AST_SOFTHANGUP_ALL =       (0xFFFFFFFF)
};

enum ast_bridge_result

Enumerator:

AST_BRIDGE_COMPLETE
AST_BRIDGE_FAILED
AST_BRIDGE_FAILED_NOWARN
AST_BRIDGE_RETRY

Definition at line 168 of file channel.h.

                       {
   AST_BRIDGE_COMPLETE = 0,
   AST_BRIDGE_FAILED = -1,
   AST_BRIDGE_FAILED_NOWARN = -2,
   AST_BRIDGE_RETRY = -3,
};

enum ast_channel_adsicpe

Enumerator:

AST_ADSI_UNKNOWN
AST_ADSI_AVAILABLE
AST_ADSI_UNAVAILABLE
AST_ADSI_OFFHOOKONLY

Definition at line 659 of file channel.h.

                         {
   AST_ADSI_UNKNOWN,
   AST_ADSI_AVAILABLE,
   AST_ADSI_UNAVAILABLE,
   AST_ADSI_OFFHOOKONLY,
};

enum AST_PARTY_CHAR_SET

Party name character set enumeration values (values from Q.SIG)

Enumerator:

AST_PARTY_CHAR_SET_UNKNOWN
AST_PARTY_CHAR_SET_ISO8859_1
AST_PARTY_CHAR_SET_WITHDRAWN
AST_PARTY_CHAR_SET_ISO8859_2
AST_PARTY_CHAR_SET_ISO8859_3
AST_PARTY_CHAR_SET_ISO8859_4
AST_PARTY_CHAR_SET_ISO8859_5
AST_PARTY_CHAR_SET_ISO8859_7
AST_PARTY_CHAR_SET_ISO10646_BMPSTRING
AST_PARTY_CHAR_SET_ISO10646_UTF_8STRING

Definition at line 192 of file channel.h.

                        {
   AST_PARTY_CHAR_SET_UNKNOWN = 0,
   AST_PARTY_CHAR_SET_ISO8859_1 = 1,
   AST_PARTY_CHAR_SET_WITHDRAWN = 2,/* ITU withdrew this enum value. */
   AST_PARTY_CHAR_SET_ISO8859_2 = 3,
   AST_PARTY_CHAR_SET_ISO8859_3 = 4,
   AST_PARTY_CHAR_SET_ISO8859_4 = 5,
   AST_PARTY_CHAR_SET_ISO8859_5 = 6,
   AST_PARTY_CHAR_SET_ISO8859_7 = 7,
   AST_PARTY_CHAR_SET_ISO10646_BMPSTRING = 8,
   AST_PARTY_CHAR_SET_ISO10646_UTF_8STRING = 9,
};

enum ast_t38_state

Possible T38 states on channels.

Enumerator:

T38_STATE_UNAVAILABLE	T38 is unavailable on this channel or disabled by configuration
T38_STATE_UNKNOWN	The channel supports T38 but the current status is unknown
T38_STATE_NEGOTIATING	T38 is being negotiated
T38_STATE_REJECTED	Remote side has rejected our offer
T38_STATE_NEGOTIATED	T38 established

Definition at line 669 of file channel.h.

                   {
   T38_STATE_UNAVAILABLE,  /*!< T38 is unavailable on this channel or disabled by configuration */
   T38_STATE_UNKNOWN,   /*!< The channel supports T38 but the current status is unknown */
   T38_STATE_NEGOTIATING,  /*!< T38 is being negotiated */
   T38_STATE_REJECTED,  /*!< Remote side has rejected our offer */
   T38_STATE_NEGOTIATED,   /*!< T38 established */
};

enum channelreloadreason

Channel reload reasons for manager events at load or reload of configuration.

Enumerator:

CHANNEL_MODULE_LOAD
CHANNEL_MODULE_RELOAD
CHANNEL_CLI_RELOAD
CHANNEL_MANAGER_RELOAD

Definition at line 1056 of file channel.h.

                         {
   CHANNEL_MODULE_LOAD,
   CHANNEL_MODULE_RELOAD,
   CHANNEL_CLI_RELOAD,
   CHANNEL_MANAGER_RELOAD,
};

---

Function Documentation

int __ast_answer	(	struct ast_channel *	chan,
		unsigned int	delay,
		int	cdr_answer
	)

Answer a channel, with a selectable delay before returning.

Parameters:

	chan	channel to answer
	delay	maximum amount of time to wait for incoming media
	cdr_answer	flag to control whether any associated CDR should be marked as 'answered'

This function answers a channel and handles all necessary call setup functions.

Note:

The channel passed does not need to be locked, but is locked by the function when needed.

This function will wait up to 'delay' milliseconds for media to arrive on the channel before returning to the caller, so that the caller can properly assume the channel is 'ready' for media flow. If 'delay' is less than 500, the function will wait up to 500 milliseconds.

Return values:

	0	on success
	non-zero	on failure

Definition at line 2982 of file channel.c.

References ast_channel::_state, ast_channel_lock, ast_channel_unlock, AST_CONTROL_HANGUP, ast_debug, AST_FRAME_CNG, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_frfree, ast_frisolate(), AST_LIST_HEAD_INIT_NOLOCK, AST_LIST_HEAD_NOLOCK, AST_LIST_INSERT_HEAD, AST_LIST_REMOVE_HEAD, ast_log(), ast_queue_frame_head(), ast_raw_answer(), ast_read(), ast_remaining_ms(), AST_STATE_RING, AST_STATE_RINGING, ast_tvnow(), ast_waitfor(), errno, frames, ast_frame::frametype, ast_frame_subclass::integer, LOG_WARNING, MAX, and ast_frame::subclass.

Referenced by ast_answer(), pbx_builtin_answer(), and pbx_builtin_incomplete().

{
   int res = 0;
   enum ast_channel_state old_state;

   old_state = chan->_state;
   if ((res = ast_raw_answer(chan, cdr_answer))) {
      return res;
   }

   switch (old_state) {
   case AST_STATE_RINGING:
   case AST_STATE_RING:
      /* wait for media to start flowing, but don't wait any longer
       * than 'delay' or 500 milliseconds, whichever is longer
       */
      do {
         AST_LIST_HEAD_NOLOCK(, ast_frame) frames;
         struct ast_frame *cur, *new;
         int timeout_ms = MAX(delay, 500);
         unsigned int done = 0;
         struct timeval start;

         AST_LIST_HEAD_INIT_NOLOCK(&frames);

         start = ast_tvnow();
         for (;;) {
            int ms = ast_remaining_ms(start, timeout_ms);
            ms = ast_waitfor(chan, ms);
            if (ms < 0) {
               ast_log(LOG_WARNING, "Error condition occurred when polling channel %s for a voice frame: %s\n", chan->name, strerror(errno));
               res = -1;
               break;
            }
            if (ms == 0) {
               ast_debug(2, "Didn't receive a media frame from %s within %d ms of answering. Continuing anyway\n", chan->name, MAX(delay, 500));
               break;
            }
            cur = ast_read(chan);
            if (!cur || ((cur->frametype == AST_FRAME_CONTROL) &&
                    (cur->subclass.integer == AST_CONTROL_HANGUP))) {
               if (cur) {
                  ast_frfree(cur);
               }
               res = -1;
               ast_debug(2, "Hangup of channel %s detected in answer routine\n", chan->name);
               break;
            }

            if ((new = ast_frisolate(cur)) != cur) {
               ast_frfree(cur);
            }

            AST_LIST_INSERT_HEAD(&frames, new, frame_list);

            /* if a specific delay period was requested, continue
             * until that delay has passed. don't stop just because
             * incoming media has arrived.
             */
            if (delay) {
               continue;
            }

            switch (new->frametype) {
               /* all of these frametypes qualify as 'media' */
            case AST_FRAME_VOICE:
            case AST_FRAME_VIDEO:
            case AST_FRAME_TEXT:
            case AST_FRAME_DTMF_BEGIN:
            case AST_FRAME_DTMF_END:
            case AST_FRAME_IMAGE:
            case AST_FRAME_HTML:
            case AST_FRAME_MODEM:
               done = 1;
               break;
            case AST_FRAME_CONTROL:
            case AST_FRAME_IAX:
            case AST_FRAME_NULL:
            case AST_FRAME_CNG:
               break;
            }

            if (done) {
               break;
            }
         }

         if (res == 0) {
            ast_channel_lock(chan);
            while ((cur = AST_LIST_REMOVE_HEAD(&frames, frame_list))) {
               ast_queue_frame_head(chan, cur);
               ast_frfree(cur);
            }
            ast_channel_unlock(chan);
         }
      } while (0);
      break;
   default:
      break;
   }

   return res;
}

struct ast_channel* attribute_malloc __ast_channel_alloc	(	int	needqueue,
		int	state,
		const char *	cid_num,
		const char *	cid_name,
		const char *	acctcode,
		const char *	exten,
		const char *	context,
		const char *	linkedid,
		const int	amaflag,
		const char *	file,
		int	line,
		const char *	function,
		const char *	name_fmt,
			...
	)			[read]

Create a channel structure.

Since:

1.8

Return values:

	NULL	failure
	non-NULL	successfully allocated channel

Note:

Absolutely _NO_ channel locks should be held before calling this function.

By default, new channels are set to the "s" extension and "default" context.

Definition at line 1366 of file channel.c.

References __ast_channel_alloc_ap().

{
   va_list ap1, ap2;
   struct ast_channel *result;

   va_start(ap1, name_fmt);
   va_start(ap2, name_fmt);
   result = __ast_channel_alloc_ap(needqueue, state, cid_num, cid_name, acctcode, exten, context,
               linkedid, amaflag, file, line, function, name_fmt, ap1, ap2);
   va_end(ap1);
   va_end(ap2);

   return result;
}

struct ast_channel* __ast_dummy_channel_alloc	(	const char *	file,
		int	line,
		const char *	function
	)			[read]

Definition at line 1389 of file channel.c.

References __ao2_alloc_debug(), ast_channel::alertpipe, ao2_alloc, ARRAY_LEN, ast_channel_unref, ast_dummy_channel_destructor(), AST_LIST_HEAD_INIT_NOLOCK, ast_string_field_init, ast_channel::fds, ast_channel::timingfd, and ast_channel::varshead.

{
   struct ast_channel *tmp;
   struct varshead *headp;
   int x;

#if defined(REF_DEBUG)
   tmp = __ao2_alloc_debug(sizeof(*tmp), ast_dummy_channel_destructor, "dummy channel",
      file, line, function, 1);
#elif defined(__AST_DEBUG_MALLOC)
   tmp = __ao2_alloc_debug(sizeof(*tmp), ast_dummy_channel_destructor, "dummy channel",
      file, line, function, 0);
#else
   tmp = ao2_alloc(sizeof(*tmp), ast_dummy_channel_destructor);
#endif
   if (!tmp) {
      /* Dummy channel structure allocation failure. */
      return NULL;
   }

   if ((ast_string_field_init(tmp, 128))) {
      return ast_channel_unref(tmp);
   }

   /*
    * Init file descriptors to unopened state just in case
    * autoservice is called on the channel or something tries to
    * read a frame from it.
    */
   tmp->timingfd = -1;
   for (x = 0; x < ARRAY_LEN(tmp->alertpipe); ++x) {
      tmp->alertpipe[x] = -1;
   }
   for (x = 0; x < ARRAY_LEN(tmp->fds); ++x) {
      tmp->fds[x] = -1;
   }
#ifdef HAVE_EPOLL
   tmp->epfd = -1;
#endif

   headp = &tmp->varshead;
   AST_LIST_HEAD_INIT_NOLOCK(headp);

   return tmp;
}

struct ast_channel* __ast_request_and_dial	(	const char *	type,
		format_t	format,
		const struct ast_channel *	requestor,
		void *	data,
		int	timeout,
		int *	reason,
		const char *	cid_num,
		const char *	cid_name,
		struct outgoing_helper *	oh
	)			[read]

Request a channel of a given type, with data as optional information used by the low level module and attempt to place a call on it.

Parameters:

	type	type of channel to request
	format	requested channel format
	requestor	channel requesting data
	data	data to pass to the channel requester
	timeout	maximum amount of time to wait for an answer
	reason	why unsuccessful (if unsuccessful)
	cid_num	Caller-ID Number
	cid_name	Caller-ID Name (ascii)
	oh	Outgoing helper

Returns:

Returns an ast_channel on success or no answer, NULL on failure. Check the value of chan->_state to know if the call was answered or not.

Definition at line 5413 of file channel.c.

References ast_channel::_state, outgoing_helper::account, ast_call(), ast_call_forward(), AST_CAUSE_NO_ANSWER, ast_cdr_alloc(), ast_cdr_answer(), ast_cdr_busy(), ast_cdr_disposition(), ast_cdr_end(), ast_cdr_failed(), AST_CDR_FLAG_ORIGINATED, ast_cdr_init(), ast_cdr_setaccount(), ast_cdr_setapp(), ast_cdr_start(), ast_cdr_update(), ast_channel_datastore_inherit(), ast_channel_inherit_variables(), ast_channel_lock, ast_channel_lock_both, ast_channel_set_connected_line(), ast_channel_unlock, AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CC, AST_CONTROL_CONGESTION, AST_CONTROL_CONNECTED_LINE, AST_CONTROL_HANGUP, AST_CONTROL_HOLD, AST_CONTROL_INCOMPLETE, AST_CONTROL_PROCEEDING, AST_CONTROL_PROGRESS, AST_CONTROL_REDIRECTING, AST_CONTROL_RINGING, AST_CONTROL_SRCCHANGE, AST_CONTROL_SRCUPDATE, AST_CONTROL_UNHOLD, AST_CONTROL_VIDUPDATE, ast_copy_string(), AST_FRAME_CONTROL, ast_frfree, ast_hangup(), ast_log(), ast_party_connected_line_set_init(), AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED, ast_read(), ast_remaining_ms(), ast_request(), ast_set_callerid(), ast_set_flag, ast_set_variables(), AST_STATE_UP, ast_strlen_zero(), ast_tvnow(), ast_waitfor(), ast_channel::cdr, outgoing_helper::cid_name, outgoing_helper::cid_num, ast_channel::connected, ast_channel::context, outgoing_helper::context, ast_channel::exten, outgoing_helper::exten, ast_frame::frametype, handle_cause(), ast_channel::hangupcause, ast_party_connected_line::id, ast_frame_subclass::integer, LOG_NOTICE, ast_party_id::name, ast_party_id::number, outgoing_helper::parent_channel, ast_party_name::presentation, ast_party_number::presentation, ast_channel::priority, outgoing_helper::priority, ast_party_name::str, ast_party_number::str, ast_frame::subclass, ast_party_name::valid, ast_party_number::valid, and outgoing_helper::vars.

Referenced by ast_pbx_outgoing_app(), ast_pbx_outgoing_exten(), ast_request_and_dial(), and parkandannounce_exec().

{
   int dummy_outstate;
   int cause = 0;
   struct ast_channel *chan;
   int res = 0;
   int last_subclass = 0;
   struct ast_party_connected_line connected;
   
   if (outstate)
      *outstate = 0;
   else
      outstate = &dummy_outstate;   /* make outstate always a valid pointer */

   chan = ast_request(type, format, requestor, data, &cause);
   if (!chan) {
      ast_log(LOG_NOTICE, "Unable to request channel %s/%s\n", type, (char *)data);
      handle_cause(cause, outstate);
      return NULL;
   }

   if (oh) {
      if (oh->vars) {
         ast_set_variables(chan, oh->vars);
      }
      if (!ast_strlen_zero(oh->cid_num) && !ast_strlen_zero(oh->cid_name)) {
         /*
          * Use the oh values instead of the function parameters for the
          * outgoing CallerID.
          */
         cid_num = oh->cid_num;
         cid_name = oh->cid_name;
      }
      if (oh->parent_channel) {
         /* Safely inherit variables and datastores from the parent channel. */
         ast_channel_lock_both(oh->parent_channel, chan);
         ast_channel_inherit_variables(oh->parent_channel, chan);
         ast_channel_datastore_inherit(oh->parent_channel, chan);
         ast_channel_unlock(oh->parent_channel);
         ast_channel_unlock(chan);
      }
      if (oh->account) {
         ast_channel_lock(chan);
         ast_cdr_setaccount(chan, oh->account);
         ast_channel_unlock(chan);
      }
   }

   /*
    * I seems strange to set the CallerID on an outgoing call leg
    * to whom we are calling, but this function's callers are doing
    * various Originate methods.  This call leg goes to the local
    * user.  Once the local user answers, the dialplan needs to be
    * able to access the CallerID from the CALLERID function as if
    * the local user had placed this call.
    */
   ast_set_callerid(chan, cid_num, cid_name, cid_num);

   ast_set_flag(chan->cdr, AST_CDR_FLAG_ORIGINATED);
   ast_party_connected_line_set_init(&connected, &chan->connected);
   if (cid_num) {
      connected.id.number.valid = 1;
      connected.id.number.str = (char *) cid_num;
      connected.id.number.presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
   }
   if (cid_name) {
      connected.id.name.valid = 1;
      connected.id.name.str = (char *) cid_name;
      connected.id.name.presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
   }
   ast_channel_set_connected_line(chan, &connected, NULL);

   if (ast_call(chan, data, 0)) {   /* ast_call failed... */
      ast_log(LOG_NOTICE, "Unable to call channel %s/%s\n", type, (char *)data);
   } else {
      struct timeval start = ast_tvnow();
      res = 1; /* mark success in case chan->_state is already AST_STATE_UP */
      while (timeout && chan->_state != AST_STATE_UP) {
         struct ast_frame *f;
         int ms = ast_remaining_ms(start, timeout);

         res = ast_waitfor(chan, ms);
         if (res == 0) { /* timeout, treat it like ringing */
            *outstate = AST_CONTROL_RINGING;
            break;
         }
         if (res < 0) /* error or done */
            break;
         if (!ast_strlen_zero(chan->call_forward)) {
            if (!(chan = ast_call_forward(NULL, chan, NULL, format, oh, outstate))) {
               return NULL;
            }
            continue;
         }

         f = ast_read(chan);
         if (!f) {
            *outstate = AST_CONTROL_HANGUP;
            res = 0;
            break;
         }
         if (f->frametype == AST_FRAME_CONTROL) {
            switch (f->subclass.integer) {
            case AST_CONTROL_RINGING:  /* record but keep going */
               *outstate = f->subclass.integer;
               break;

            case AST_CONTROL_BUSY:
               ast_cdr_busy(chan->cdr);
               *outstate = f->subclass.integer;
               timeout = 0;
               break;

            case AST_CONTROL_INCOMPLETE:
               ast_cdr_failed(chan->cdr);
               *outstate = AST_CONTROL_CONGESTION;
               timeout = 0;
               break;

            case AST_CONTROL_CONGESTION:
               ast_cdr_failed(chan->cdr);
               *outstate = f->subclass.integer;
               timeout = 0;
               break;

            case AST_CONTROL_ANSWER:
               ast_cdr_answer(chan->cdr);
               *outstate = f->subclass.integer;
               timeout = 0;      /* trick to force exit from the while() */
               break;

            /* Ignore these */
            case AST_CONTROL_PROGRESS:
            case AST_CONTROL_PROCEEDING:
            case AST_CONTROL_HOLD:
            case AST_CONTROL_UNHOLD:
            case AST_CONTROL_VIDUPDATE:
            case AST_CONTROL_SRCUPDATE:
            case AST_CONTROL_SRCCHANGE:
            case AST_CONTROL_CONNECTED_LINE:
            case AST_CONTROL_REDIRECTING:
            case AST_CONTROL_CC:
            case -1:       /* Ignore -- just stopping indications */
               break;

            default:
               ast_log(LOG_NOTICE, "Don't know what to do with control frame %d\n", f->subclass.integer);
            }
            last_subclass = f->subclass.integer;
         }
         ast_frfree(f);
      }
   }

   /* Final fixups */
   if (oh) {
      if (!ast_strlen_zero(oh->context))
         ast_copy_string(chan->context, oh->context, sizeof(chan->context));
      if (!ast_strlen_zero(oh->exten))
         ast_copy_string(chan->exten, oh->exten, sizeof(chan->exten));
      if (oh->priority) 
         chan->priority = oh->priority;
   }
   if (chan->_state == AST_STATE_UP)
      *outstate = AST_CONTROL_ANSWER;

   if (res <= 0) {
      ast_channel_lock(chan);
      if (AST_CONTROL_RINGING == last_subclass) {
         chan->hangupcause = AST_CAUSE_NO_ANSWER;
      }
      if (!chan->cdr && (chan->cdr = ast_cdr_alloc())) {
         ast_cdr_init(chan->cdr, chan);
      }
      if (chan->cdr) {
         char tmp[256];

         snprintf(tmp, sizeof(tmp), "%s/%s", type, (char *)data);
         ast_cdr_setapp(chan->cdr, "Dial", tmp);
         ast_cdr_update(chan);
         ast_cdr_start(chan->cdr);
         ast_cdr_end(chan->cdr);
         /* If the cause wasn't handled properly */
         if (ast_cdr_disposition(chan->cdr, chan->hangupcause)) {
            ast_cdr_failed(chan->cdr);
         }
      }
      ast_channel_unlock(chan);
      ast_hangup(chan);
      chan = NULL;
   }
   return chan;
}

int ast_activate_generator	(	struct ast_channel *	chan,
		struct ast_generator *	gen,
		void *	params
	)

Activate a given generator

Definition at line 3140 of file channel.c.

References ast_generator::alloc, ast_channel_lock, ast_channel_unlock, ast_prod(), ast_settimeout(), ast_channel::generator, generator_force(), ast_channel::generatordata, and ast_generator::release.

Referenced by app_exec(), ast_channel_start_silence_generator(), ast_linear_stream(), ast_playtones_start(), ast_tonepair_start(), channel_spy(), eivr_comm(), local_ast_moh_start(), old_milliwatt_exec(), and transmit_audio().

{
   int res = 0;

   ast_channel_lock(chan);
   if (chan->generatordata) {
      if (chan->generator && chan->generator->release)
         chan->generator->release(chan, chan->generatordata);
      chan->generatordata = NULL;
   }
   if (gen->alloc && !(chan->generatordata = gen->alloc(chan, params))) {
      res = -1;
   }
   if (!res) {
      ast_settimeout(chan, 50, generator_force, chan);
      chan->generator = gen;
   }
   ast_channel_unlock(chan);

   ast_prod(chan);

   return res;
}

int ast_active_channels

(

void

)

returns number of active/allocated channels

Returns:

number of channels available for lookup

Definition at line 848 of file channel.c.

References ao2_container_count(), and channels.

Referenced by action_corestatus(), ast_var_channels(), ast_var_channels_table(), dahdi_restart(), handle_chanlist(), handle_show_settings(), and really_quit().

{
   return channels ? ao2_container_count(channels) : 0;
}

static int ast_add_fd	(	struct pollfd *	pfd,
		int	fd
	)			[inline, static]

if fd is a valid descriptor, set *pfd with the descriptor

Returns:

Return 1 (not -1!) if added, 0 otherwise (so we can add the return value to the index into the array)

Definition at line 2385 of file channel.h.

Referenced by ast_waitfor_nandfds().

{
   pfd->fd = fd;
   pfd->events = POLLIN | POLLPRI;
   return fd >= 0;
}

int ast_answer

(

struct ast_channel *

chan

)

Answer a channel.

Parameters:

chan

channel to answer

This function answers a channel and handles all necessary call setup functions.

Note:

The channel passed does not need to be locked, but is locked by the function when needed.

This function will wait up to 500 milliseconds for media to arrive on the channel before returning to the caller, so that the caller can properly assume the channel is 'ready' for media flow.

Return values:

	0	on success
	non-zero	on failure

Definition at line 3086 of file channel.c.

References __ast_answer().

Referenced by action_bridge(), agi_exec_full(), alarmreceiver_exec(), answer_trunk_chan(), app_exec(), ast_control_streamfile(), ast_do_pickup(), ast_pickup_call(), auth_exec(), background_detect_exec(), bridge_exec(), builtin_parkcall(), common_exec(), conf_exec(), count_exec(), dahdiras_exec(), dial_exec_full(), dictate_exec(), directory_exec(), disa_exec(), eivr_comm(), handle_answer(), ices_exec(), login_exec(), minivm_accmess_exec(), minivm_greet_exec(), minivm_record_exec(), old_milliwatt_exec(), park_call_exec(), parked_call_exec(), pbx_builtin_background(), playback_exec(), privacy_exec(), read_exec(), readexten_exec(), receivefax_exec(), record_exec(), sayunixtime_exec(), send_waveform_to_channel(), sendfax_exec(), setup_privacy_args(), skel_exec(), sla_station_exec(), speech_background(), testclient_exec(), testserver_exec(), transmit(), vm_exec(), vm_execmain(), waitfor_exec(), and zapateller_exec().

{
   return __ast_answer(chan, 0, 1);
}

int ast_autoservice_ignore	(	struct ast_channel *	chan,
		enum ast_frame_type	ftype
	)

Ignore certain frame types.

Note:

Normally, we cache DTMF, IMAGE, HTML, TEXT, and CONTROL frames while a channel is in autoservice and queue them up when taken out of autoservice. When this is not desireable, this API may be used to cause the channel to ignore those frametypes after the channel is put into autoservice, but before autoservice is stopped.

Return values:

	0	success
	-1	channel is not in autoservice

Definition at line 306 of file autoservice.c.

References AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, asent::chan, asent::ignore_frame_types, and asent::list.

Referenced by builtin_automixmonitor(), feature_exec_app(), and play_message_on_chan().

{
   struct asent *as;
   int res = -1;

   AST_LIST_LOCK(&aslist);
   AST_LIST_TRAVERSE(&aslist, as, list) {
      if (as->chan == chan) {
         res = 0;
         as->ignore_frame_types |= (1 << ftype);
         break;
      }
   }
   AST_LIST_UNLOCK(&aslist);
   return res;
}

int ast_autoservice_start

(

struct ast_channel *

chan

)

Automatically service a channel for us...

Return values:

	0	success
	-1	failure, or the channel is already being autoserviced

Definition at line 178 of file autoservice.c.

References as_cond, ast_calloc, ast_channel_lock, ast_channel_unlock, ast_cond_signal, AST_FLAG_END_DTMF_ONLY, AST_LIST_EMPTY, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_log(), ast_pthread_create_background, AST_PTHREADT_NULL, ast_set_flag, ast_test_flag, asthread, autoservice_run(), asent::chan, free, asent::list, LOG_WARNING, asent::orig_end_dtmf_flag, and asent::use_count.

Referenced by _macro_exec(), acf_curl_helper(), acf_jabberreceive_read(), acf_odbc_read(), acf_odbc_write(), ast_app_run_macro(), ast_dtmf_stream(), ast_get_enum(), ast_get_srv(), ast_get_txt(), ast_masq_park_call_exten(), ast_park_call_exten(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), builtin_blindtransfer(), conf_play(), confbridge_exec(), dial_exec_full(), exec(), feature_exec_app(), feature_request_and_dial(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), leave_conference_bridge(), lock_read(), lua_autoservice_start(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), originate_exec(), osplookup_exec(), pbx_find_extension(), play_message_on_chan(), realtimefield_read(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), srv_datastore_setup(), system_exec_helper(), try_calling(), and trylock_read().

{
   int res = 0;
   struct asent *as;

   AST_LIST_LOCK(&aslist);
   AST_LIST_TRAVERSE(&aslist, as, list) {
      if (as->chan == chan) {
         as->use_count++;
         break;
      }
   }
   AST_LIST_UNLOCK(&aslist);

   if (as) {
      /* Entry exists, autoservice is already handling this channel */
      return 0;
   }

   if (!(as = ast_calloc(1, sizeof(*as))))
      return -1;
   
   /* New entry created */
   as->chan = chan;
   as->use_count = 1;

   ast_channel_lock(chan);
   as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0;
   if (!as->orig_end_dtmf_flag)
      ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY);
   ast_channel_unlock(chan);

   AST_LIST_LOCK(&aslist);

   if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) {
      ast_cond_signal(&as_cond);
   }

   AST_LIST_INSERT_HEAD(&aslist, as, list);

   if (asthread == AST_PTHREADT_NULL) { /* need start the thread */
      if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) {
         ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
         /* There will only be a single member in the list at this point,
            the one we just added. */
         AST_LIST_REMOVE(&aslist, as, list);
         free(as);
         asthread = AST_PTHREADT_NULL;
         res = -1;
      } else {
         pthread_kill(asthread, SIGURG);
      }
   }

   AST_LIST_UNLOCK(&aslist);

   return res;
}

int ast_autoservice_stop

(

struct ast_channel *

chan

)

Stop servicing a channel for us...

Note:

if chan is locked prior to calling ast_autoservice_stop, it is likely that there will be a deadlock between the thread that calls ast_autoservice_stop and the autoservice thread. It is important that chan is not locked prior to this call

Parameters:

chan

Return values:

	0	success
	-1	error, or the channel has been hungup

Definition at line 237 of file autoservice.c.

References ast_channel::_softhangup, as_chan_list_state, ast_channel_lock, ast_channel_unlock, ast_clear_flag, AST_FLAG_END_DTMF_ONLY, ast_frfree, AST_LIST_LOCK, AST_LIST_REMOVE_CURRENT, AST_LIST_REMOVE_HEAD, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_LIST_UNLOCK, AST_PTHREADT_NULL, ast_queue_frame_head(), asthread, asent::chan, asent::deferred_frames, f, ast_frame::frametype, free, asent::ignore_frame_types, asent::list, asent::orig_end_dtmf_flag, and asent::use_count.

Referenced by _macro_exec(), acf_curl_helper(), acf_jabberreceive_read(), acf_odbc_read(), acf_odbc_write(), array(), ast_app_run_macro(), ast_dtmf_stream(), ast_get_enum(), ast_get_srv(), ast_get_txt(), ast_hangup(), ast_masq_park_call_exten(), ast_park_call_exten(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), conf_play(), confbridge_exec(), dial_exec_full(), exec(), feature_exec_app(), feature_request_and_dial(), finishup(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), leave_conference_bridge(), lock_read(), lua_autoservice_stop(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), originate_exec(), osplookup_exec(), pbx_find_extension(), play_message_on_chan(), realtimefield_read(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), srv_datastore_setup(), system_exec_helper(), try_calling(), and trylock_read().

{
   int res = -1;
   struct asent *as, *removed = NULL;
   struct ast_frame *f;
   int chan_list_state;

   AST_LIST_LOCK(&aslist);

   /* Save the autoservice channel list state.  We _must_ verify that the channel
    * list has been rebuilt before we return.  Because, after we return, the channel
    * could get destroyed and we don't want our poor autoservice thread to step on
    * it after its gone! */
   chan_list_state = as_chan_list_state;

   /* Find the entry, but do not free it because it still can be in the
      autoservice thread array */
   AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) {  
      if (as->chan == chan) {
         as->use_count--;
         if (as->use_count < 1) {
            AST_LIST_REMOVE_CURRENT(list);
            removed = as;
         }
         break;
      }
   }
   AST_LIST_TRAVERSE_SAFE_END;

   if (removed && asthread != AST_PTHREADT_NULL) {
      pthread_kill(asthread, SIGURG);
   }

   AST_LIST_UNLOCK(&aslist);

   if (!removed) {
      return 0;
   }

   /* Wait while autoservice thread rebuilds its list. */
   while (chan_list_state == as_chan_list_state) {
      usleep(1000);
   }

   /* Now autoservice thread should have no references to our entry
      and we can safely destroy it */

   if (!chan->_softhangup) {
      res = 0;
   }

   if (!as->orig_end_dtmf_flag) {
      ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
   }

   ast_channel_lock(chan);
   while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) {
      if (!((1 << f->frametype) & as->ignore_frame_types)) {
         ast_queue_frame_head(chan, f);
      }
      ast_frfree(f);
   }
   ast_channel_unlock(chan);

   free(as);

   return res;
}

void ast_begin_shutdown

(

int

hangup

)

Initiate system shutdown -- prevents new channels from being allocated.

Parameters:

hangup

If "hangup" is non-zero, all existing channels will receive soft hangups

Definition at line 838 of file channel.c.

References ao2_callback, ast_channel_softhangup_cb(), channels, OBJ_MULTIPLE, and OBJ_NODATA.

Referenced by can_safely_quit().

{
   shutting_down = 1;

   if (hangup) {
      ao2_callback(channels, OBJ_NODATA | OBJ_MULTIPLE, ast_channel_softhangup_cb, NULL);
   }
}

format_t ast_best_codec

(

format_t

fmts

)

Pick the best audio codec.

Pick the best codec Choose the best codec... Uhhh... Yah.

Okay, ulaw is used by all telephony equipment, so start with it

Unless of course, you're a silly European, so then prefer ALAW

G.722 is better then all below, but not as common as the above... so give ulaw and alaw priority

Okay, well, signed linear is easy to translate into other stuff

G.726 is standard ADPCM, in RFC3551 packing order

G.726 is standard ADPCM, in AAL2 packing order

ADPCM has great sound quality and is still pretty easy to translate

Okay, we're down to vocoders now, so pick GSM because it's small and easier to translate and sounds pretty good

iLBC is not too bad

Speex is free, but computationally more expensive than GSM

Ick, LPC10 sounds terrible, but at least we have code for it, if you're tacky enough to use it

G.729a is faster than 723 and slightly less expensive

Down to G.723.1 which is proprietary but at least designed for voice

Definition at line 1062 of file channel.c.

References ARRAY_LEN, AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_AUDIO_MASK, AST_FORMAT_G719, AST_FORMAT_G722, AST_FORMAT_G723_1, AST_FORMAT_G726, AST_FORMAT_G726_AAL2, AST_FORMAT_G729A, AST_FORMAT_GSM, AST_FORMAT_ILBC, AST_FORMAT_LPC10, AST_FORMAT_SIREN14, AST_FORMAT_SIREN7, AST_FORMAT_SLINEAR, AST_FORMAT_SLINEAR16, AST_FORMAT_SPEEX, AST_FORMAT_SPEEX16, AST_FORMAT_TESTLAW, AST_FORMAT_ULAW, ast_getformatname_multiple(), ast_log(), LOG_WARNING, and prefs.

Referenced by __oh323_new(), agent_call(), ast_codec_choose(), ast_iax2_new(), ast_speech_new(), bridge_make_compatible(), builtin_atxfer(), echo_exec(), findmeexec(), gtalk_new(), handle_open_receive_channel_ack_message(), iax2_request(), jingle_new(), local_new(), login_exec(), mgcp_new(), multicast_rtp_request(), set_format(), sip_new(), skinny_new(), skinny_set_rtp_peer(), socket_process(), start_rtp(), transmit_connect(), and unistim_new().

{
   /* This just our opinion, expressed in code.  We are asked to choose
      the best codec to use, given no information */
   int x;
   static const format_t prefs[] =
   {
      /*! Okay, ulaw is used by all telephony equipment, so start with it */
      AST_FORMAT_ULAW,
      /*! Unless of course, you're a silly European, so then prefer ALAW */
      AST_FORMAT_ALAW,
      AST_FORMAT_G719,
      AST_FORMAT_SIREN14,
      AST_FORMAT_SIREN7,
      AST_FORMAT_TESTLAW,
      /*! G.722 is better then all below, but not as common as the above... so give ulaw and alaw priority */
      AST_FORMAT_G722,
      /*! Okay, well, signed linear is easy to translate into other stuff */
      AST_FORMAT_SLINEAR16,
      AST_FORMAT_SLINEAR,
      /*! G.726 is standard ADPCM, in RFC3551 packing order */
      AST_FORMAT_G726,
      /*! G.726 is standard ADPCM, in AAL2 packing order */
      AST_FORMAT_G726_AAL2,
      /*! ADPCM has great sound quality and is still pretty easy to translate */
      AST_FORMAT_ADPCM,
      /*! Okay, we're down to vocoders now, so pick GSM because it's small and easier to
          translate and sounds pretty good */
      AST_FORMAT_GSM,
      /*! iLBC is not too bad */
      AST_FORMAT_ILBC,
      /*! Speex is free, but computationally more expensive than GSM */
      AST_FORMAT_SPEEX16,
      AST_FORMAT_SPEEX,
      /*! Ick, LPC10 sounds terrible, but at least we have code for it, if you're tacky enough
          to use it */
      AST_FORMAT_LPC10,
      /*! G.729a is faster than 723 and slightly less expensive */
      AST_FORMAT_G729A,
      /*! Down to G.723.1 which is proprietary but at least designed for voice */
      AST_FORMAT_G723_1,
   };
   char buf[512];

   /* Strip out video */
   fmts &= AST_FORMAT_AUDIO_MASK;
   
   /* Find the first preferred codec in the format given */
   for (x = 0; x < ARRAY_LEN(prefs); x++) {
      if (fmts & prefs[x])
         return prefs[x];
   }

   ast_log(LOG_WARNING, "Don't know any of %s formats\n", ast_getformatname_multiple(buf, sizeof(buf), fmts));

   return 0;
}

struct ast_channel* ast_bridged_channel

(

struct ast_channel *

chan

)

[read]

Find bridged channel.

Note:

This function does _not_ return a reference to the bridged channel. The reason for this is mostly historical. It _should_ return a reference, but it will take a lot of work to make the code base account for that. So, for now, the old rules still apply for how to handle this function. If this function is being used from the channel thread that owns the channel, then a reference is already held, and channel locking is not required to guarantee that the channel will stay around. If this function is used outside of the associated channel thread, the channel parameter 'chan' MUST be locked before calling this function. Also, 'chan' must remain locked for the entire time that the result of this function is being used.

Parameters:

chan

Current channel

Returns:

A pointer to the bridged channel

Definition at line 7103 of file channel.c.

References ast_channel::_bridge, ast_channel_tech::bridged_channel, and ast_channel::tech.

Referenced by __analog_handle_event(), __analog_ss_thread(), __ast_channel_masquerade(), __ast_read(), __dahdi_exception(), _skinny_show_lines(), action_agents(), action_coreshowchannels(), agents_data_provider_get(), agents_show(), agents_show_online(), analog_attempt_transfer(), analog_exception(), analog_hangup(), analog_ss_thread(), ast_bridge_call(), ast_cel_report_event(), ast_channel_data_add_structure(), ast_channel_set_linkgroup(), ast_do_masquerade(), ast_rtp_instance_set_stats_vars(), ast_set_hangupsource(), ast_var_channel_bridge(), ast_var_channels_table(), attempt_transfer(), cb_events(), channel_spy(), check_bridge(), common_exec(), console_transfer(), create_jb(), dahdi_handle_event(), dahdi_hangup(), export_aoc_vars(), func_channel_read(), get_refer_info(), handle_chanlist(), handle_hd_hf(), handle_invite_replaces(), handle_request(), handle_request_bye(), handle_request_info(), handle_request_refer(), handle_showchan(), handle_soft_key_event_message(), handle_stimulus_message(), key_call(), key_dial_page(), local_attended_transfer(), local_queryoption(), mgcp_hangup(), mgcp_ss(), misdn_attempt_transfer(), mixmonitor_thread(), my_get_sigpvt_bridged_channel(), park_call_full(), schedule_delivery(), serialize_showchan(), sip_get_rtp_peer(), sip_get_trtp_peer(), sip_get_udptl_peer(), sip_get_vrtp_peer(), sip_hangup(), sip_set_rtp_peer(), skinny_transfer(), socket_process(), start_spying(), startmon(), TransferCallStep1(), and unistim_hangup().

{
   struct ast_channel *bridged;
   bridged = chan->_bridge;
   if (bridged && bridged->tech->bridged_channel)
      bridged = bridged->tech->bridged_channel(chan, bridged);
   return bridged;
}

int ast_call	(	struct ast_channel *	chan,
		char *	addr,
		int	timeout
	)

Make a call.

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Parameters:

	chan	which channel to make the call on
	addr	destination of the call (Should be treated as const char *)
	timeout	time to wait on for connect

Place a call, take no longer than timeout ms.

Returns:

-1 on failure, 0 on not enough time (does not automatically stop ringing), and the number of seconds the connect took otherwise.

Definition at line 5718 of file channel.c.

References AST_CDR_FLAG_DIALED, ast_channel_lock, ast_channel_unlock, ast_check_hangup(), AST_FLAG_OUTGOING, AST_FLAG_ZOMBIE, ast_set_flag, ast_test_flag, ast_channel_tech::call, ast_channel::cdr, and ast_channel::tech.

Referenced by __ast_request_and_dial(), ast_call_forward(), begin_dial_channel(), dial_exec_full(), dial_transfer(), do_forward(), feature_request_and_dial(), findmeexec(), play_sound_file(), ring_entry(), and wait_for_answer().

{
   /* Place an outgoing call, but don't wait any longer than timeout ms before returning.
      If the remote end does not answer within the timeout, then do NOT hang up, but
      return anyway.  */
   int res = -1;
   /* Stop if we're a zombie or need a soft hangup */
   ast_channel_lock(chan);
   if (!ast_test_flag(chan, AST_FLAG_ZOMBIE) && !ast_check_hangup(chan)) {
      if (chan->cdr) {
         ast_set_flag(chan->cdr, AST_CDR_FLAG_DIALED);
      }
      if (chan->tech->call)
         res = chan->tech->call(chan, addr, timeout);
      ast_set_flag(chan, AST_FLAG_OUTGOING);
   }
   ast_channel_unlock(chan);
   return res;
}

struct ast_channel* ast_call_forward	(	struct ast_channel *	caller,
		struct ast_channel *	orig,
		int *	timeout,
		format_t	format,
		struct outgoing_helper *	oh,
		int *	outstate
	)			[read]

Forwards a call to a new channel specified by the original channel's call_forward str. If possible, the new forwarded channel is created and returned while the original one is terminated.

Parameters:

	caller	in channel that requested orig
	orig	channel being replaced by the call forward channel
	timeout	maximum amount of time to wait for setup of new forward channel
	format	requested channel format
	oh	outgoing helper used with original channel
	outstate	reason why unsuccessful (if uncuccessful)

Returns:

Returns the forwarded call's ast_channel on success or NULL on failure

Definition at line 5343 of file channel.c.

References outgoing_helper::account, accountcode, ast_call(), AST_CDR_FLAG_ORIGINATED, ast_cdr_setaccount(), ast_channel_lock, ast_channel_lock_both, ast_channel_unlock, ast_copy_flags, ast_copy_string(), ast_hangup(), ast_log(), ast_party_connected_line_copy(), ast_party_redirecting_copy(), ast_request(), ast_set_variables(), ast_string_field_set, call_forward_inherit(), ast_channel::cdr, ast_channel::connected, ast_channel::context, handle_cause(), LOG_NOTICE, outgoing_helper::parent_channel, pbx_builtin_getvar_helper(), ast_channel::redirecting, S_OR, type, and outgoing_helper::vars.

Referenced by __ast_request_and_dial(), and feature_request_and_dial().

{
   char tmpchan[256];
   struct ast_channel *new_chan = NULL;
   char *data, *type;
   int cause = 0;
   int res;

   /* gather data and request the new forward channel */
   ast_copy_string(tmpchan, orig->call_forward, sizeof(tmpchan));
   if ((data = strchr(tmpchan, '/'))) {
      *data++ = '\0';
      type = tmpchan;
   } else {
      const char *forward_context;
      ast_channel_lock(orig);
      forward_context = pbx_builtin_getvar_helper(orig, "FORWARD_CONTEXT");
      snprintf(tmpchan, sizeof(tmpchan), "%s@%s", orig->call_forward, S_OR(forward_context, orig->context));
      ast_channel_unlock(orig);
      data = tmpchan;
      type = "Local";
   }
   if (!(new_chan = ast_request(type, format, orig, data, &cause))) {
      ast_log(LOG_NOTICE, "Unable to create channel for call forward to '%s/%s' (cause = %d)\n", type, data, cause);
      handle_cause(cause, outstate);
      ast_hangup(orig);
      return NULL;
   }

   /* Copy/inherit important information into new channel */
   if (oh) {
      if (oh->vars) {
         ast_set_variables(new_chan, oh->vars);
      }
      if (oh->parent_channel) {
         call_forward_inherit(new_chan, oh->parent_channel, orig);
      }
      if (oh->account) {
         ast_channel_lock(new_chan);
         ast_cdr_setaccount(new_chan, oh->account);
         ast_channel_unlock(new_chan);
      }
   } else if (caller) { /* no outgoing helper so use caller if available */
      call_forward_inherit(new_chan, caller, orig);
   }

   ast_channel_lock_both(orig, new_chan);
   ast_copy_flags(new_chan->cdr, orig->cdr, AST_CDR_FLAG_ORIGINATED);
   ast_string_field_set(new_chan, accountcode, orig->accountcode);
   ast_party_connected_line_copy(&new_chan->connected, &orig->connected);
   ast_party_redirecting_copy(&new_chan->redirecting, &orig->redirecting);
   ast_channel_unlock(new_chan);
   ast_channel_unlock(orig);

   /* call new channel */
   res = ast_call(new_chan, data, 0);
   if (timeout) {
      *timeout = res;
   }
   if (res) {
      ast_log(LOG_NOTICE, "Unable to call forward to channel %s/%s\n", type, (char *)data);
      ast_hangup(orig);
      ast_hangup(new_chan);
      return NULL;
   }
   ast_hangup(orig);

   return new_chan;
}

void ast_cancel_shutdown

(

void

)

Cancel a shutdown in progress.

Cancels an existing shutdown and returns to normal operation

Definition at line 859 of file channel.c.

Referenced by handle_abort_shutdown().

{
   shutting_down = 0;
}

const char* ast_cause2str

(

int

cause

)

Gives the string form of a given cause code.

Parameters:

state

cause to get the description of

Returns:

the text form of the binary cause code given

Definition at line 980 of file channel.c.

References ARRAY_LEN, causes, and causes_map::desc.

Referenced by __transmit_response(), ast_channel_data_add_structure(), ast_do_masquerade(), ast_hangup(), dial_exec_full(), findmeexec(), sip_hangup(), and transmit_request_with_auth().

{
   int x;

   for (x = 0; x < ARRAY_LEN(causes); x++) {
      if (causes[x].cause == cause)
         return causes[x].desc;
   }

   return "Unknown";
}

void ast_change_name	(	struct ast_channel *	chan,
		const char *	newname
	)

Change channel name.

Precondition:

Absolutely all channels _MUST_ be unlocked before calling this function.

Parameters:

	chan	the channel to change the name of
	newname	the name to change to

Returns:

nothing

Note:

this function must _NEVER_ be used when any channels are locked regardless if it is the channel who's name is being changed or not because it invalidates our channel container locking order... lock container first, then the individual channels, never the other way around.

Definition at line 6186 of file channel.c.

References __ast_change_name_nolink(), ao2_link, ao2_lock, ao2_unlink, ao2_unlock, ast_channel_lock, ast_channel_unlock, and channels.

Referenced by update_name().

{
   /* We must re-link, as the hash value will change here. */
   ao2_lock(channels);
   ast_channel_lock(chan);
   ao2_unlink(channels, chan);
   __ast_change_name_nolink(chan, newname);
   ao2_link(channels, chan);
   ast_channel_unlock(chan);
   ao2_unlock(channels);
}

int ast_channel_bridge	(	struct ast_channel *	c0,
		struct ast_channel *	c1,
		struct ast_bridge_config *	config,
		struct ast_frame **	fo,
		struct ast_channel **	rc
	)

Bridge two channels together.

Parameters:

	c0	first channel to bridge
	c1	second channel to bridge
	config	config for the channels
	fo	destination frame(?)
	rc	destination channel(?)

Bridge two channels (c0 and c1) together. If an important frame occurs, we return that frame in *rf (remember, it could be NULL) and which channel (0 or 1) in rc

Definition at line 7449 of file channel.c.

References ast_channel::_bridge, ast_channel::_softhangup, AST_BRIDGE_COMPLETE, AST_BRIDGE_FAILED, AST_BRIDGE_FAILED_NOWARN, AST_BRIDGE_RETRY, ast_channel_clear_softhangup(), ast_channel_lock_both, ast_channel_make_compatible(), ast_channel_unlock, ast_check_hangup(), ast_check_hangup_locked(), ast_clear_flag, AST_CONTROL_SRCUPDATE, ast_debug, AST_FEATURE_PLAY_WARNING, AST_FEATURE_WARNING_ACTIVE, AST_FLAG_END_DTMF_ONLY, AST_FLAG_NBRIDGE, AST_FLAG_ZOMBIE, ast_framehook_list_is_empty(), ast_generic_bridge(), ast_indicate(), ast_log(), ast_manager_event_multichan, ast_samp2tv(), ast_set_flag, ast_set_owners_and_peers(), AST_SOFTHANGUP_UNBRIDGE, ast_test_flag, ast_test_suite_event_notify, ast_tvadd(), ast_tvdiff_ms(), ast_tvnow(), ast_tvsub(), ast_tvzero(), ast_verb, ast_channel::audiohooks, ast_channel_tech::bridge, bridge_play_sounds(), bridge_playfile(), ast_channel::caller, ast_bridge_config::end_sound, EVENT_FLAG_CALL, ast_bridge_config::feature_start_time, ast_bridge_config::feature_timer, ast_bridge_config::features_callee, ast_bridge_config::features_caller, ast_bridge_config::flags, ast_channel::framehooks, ast_channel::generator, ast_party_caller::id, LOG_WARNING, manager_bridge_event(), ast_channel::masq, ast_channel::masqr, ast_channel::monitor, ast_channel::nativeformats, ast_bridge_config::nexteventts, ast_party_id::number, ast_bridge_config::play_warning, ast_channel::readformat, S_COR, ast_channel_tech::send_digit_begin, ast_bridge_config::start_sound, ast_bridge_config::start_time, ast_party_number::str, ast_channel::tech, ast_bridge_config::timelimit, update_bridge_vars(), ast_party_number::valid, ast_bridge_config::warning_freq, ast_bridge_config::warning_sound, and ast_channel::writeformat.

Referenced by ast_bridge_call().

{
   struct ast_channel *chans[2] = { c0, c1 };
   enum ast_bridge_result res = AST_BRIDGE_COMPLETE;
   format_t o0nativeformats;
   format_t o1nativeformats;
   long time_left_ms=0;
   char caller_warning = 0;
   char callee_warning = 0;

   *fo = NULL;

   if (c0->_bridge) {
      ast_log(LOG_WARNING, "%s is already in a bridge with %s\n",
         c0->name, c0->_bridge->name);
      return -1;
   }
   if (c1->_bridge) {
      ast_log(LOG_WARNING, "%s is already in a bridge with %s\n",
         c1->name, c1->_bridge->name);
      return -1;
   }
   
   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(c0, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c0) ||
       ast_test_flag(c1, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c1))
      return -1;

   caller_warning = ast_test_flag(&config->features_caller, AST_FEATURE_PLAY_WARNING);
   callee_warning = ast_test_flag(&config->features_callee, AST_FEATURE_PLAY_WARNING);

   if (ast_tvzero(config->start_time)) {
      config->start_time = ast_tvnow();
      if (config->start_sound) {
         if (caller_warning) {
            bridge_playfile(c0, c1, config->start_sound, config->timelimit / 1000);
         }
         if (callee_warning) {
            bridge_playfile(c1, c0, config->start_sound, config->timelimit / 1000);
         }
      }
   }

   /* Keep track of bridge */
   ast_channel_lock_both(c0, c1);
   c0->_bridge = c1;
   c1->_bridge = c0;
   ast_channel_unlock(c0);
   ast_channel_unlock(c1);

   ast_set_owners_and_peers(c0, c1);

   o0nativeformats = c0->nativeformats;
   o1nativeformats = c1->nativeformats;

   if (config->feature_timer && !ast_tvzero(config->nexteventts)) {
      config->nexteventts = ast_tvadd(config->feature_start_time, ast_samp2tv(config->feature_timer, 1000));
   } else if (config->timelimit) {
      time_left_ms = config->timelimit - ast_tvdiff_ms(ast_tvnow(), config->start_time);
      config->nexteventts = ast_tvadd(config->start_time, ast_samp2tv(config->timelimit, 1000));
      if ((caller_warning || callee_warning) && config->play_warning) {
         long next_warn = config->play_warning;
         if (time_left_ms < config->play_warning && config->warning_freq > 0) {
            /* At least one warning was played, which means we are returning after feature */
            long warns_passed = (config->play_warning - time_left_ms) / config->warning_freq;
            /* It is 'warns_passed * warning_freq' NOT '(warns_passed + 1) * warning_freq',
               because nexteventts will be updated once again in the 'if (!to)' block */
            next_warn = config->play_warning - warns_passed * config->warning_freq;
         }
         config->nexteventts = ast_tvsub(config->nexteventts, ast_samp2tv(next_warn, 1000));
      }
   } else {
      config->nexteventts.tv_sec = 0;
      config->nexteventts.tv_usec = 0;
   }

   if (!c0->tech->send_digit_begin)
      ast_set_flag(c1, AST_FLAG_END_DTMF_ONLY);
   if (!c1->tech->send_digit_begin)
      ast_set_flag(c0, AST_FLAG_END_DTMF_ONLY);
   manager_bridge_event(1, 1, c0, c1);

   /* Before we enter in and bridge these two together tell them both the source of audio has changed */
   ast_indicate(c0, AST_CONTROL_SRCUPDATE);
   ast_indicate(c1, AST_CONTROL_SRCUPDATE);

   for (/* ever */;;) {
      struct timeval now = { 0, };
      int to;

      to = -1;

      if (!ast_tvzero(config->nexteventts)) {
         now = ast_tvnow();
         to = ast_tvdiff_ms(config->nexteventts, now);
         if (to <= 0) {
            if (!config->timelimit) {
               res = AST_BRIDGE_COMPLETE;
               break;
            }
            to = 0;
         }
      }

      if (config->timelimit) {
         time_left_ms = config->timelimit - ast_tvdiff_ms(now, config->start_time);
         if (time_left_ms < to)
            to = time_left_ms;

         if (time_left_ms <= 0) {
            if (caller_warning && config->end_sound)
               bridge_playfile(c0, c1, config->end_sound, 0);
            if (callee_warning && config->end_sound)
               bridge_playfile(c1, c0, config->end_sound, 0);
            *fo = NULL;
            res = 0;
            ast_test_suite_event_notify("BRIDGE_TIMELIMIT", "Channel1: %s\r\nChannel2: %s", c0->name, c1->name);
            break;
         }

         if (!to) {
            if (time_left_ms >= 5000 && config->warning_sound && config->play_warning && ast_test_flag(config, AST_FEATURE_WARNING_ACTIVE)) {
               int t = (time_left_ms + 500) / 1000; /* round to nearest second */
               if (caller_warning)
                  bridge_playfile(c0, c1, config->warning_sound, t);
               if (callee_warning)
                  bridge_playfile(c1, c0, config->warning_sound, t);
            }

            if (config->warning_freq && (time_left_ms > (config->warning_freq + 5000))) {
               config->nexteventts = ast_tvadd(config->nexteventts, ast_samp2tv(config->warning_freq, 1000));
            } else {
               config->nexteventts = ast_tvadd(config->start_time, ast_samp2tv(config->timelimit, 1000));
            }
         }
         ast_clear_flag(config, AST_FEATURE_WARNING_ACTIVE);
      }

      if ((c0->_softhangup | c1->_softhangup) & AST_SOFTHANGUP_UNBRIDGE) {/* Bit operators are intentional. */
         if (c0->_softhangup & AST_SOFTHANGUP_UNBRIDGE) {
            ast_channel_clear_softhangup(c0, AST_SOFTHANGUP_UNBRIDGE);
         }
         if (c1->_softhangup & AST_SOFTHANGUP_UNBRIDGE) {
            ast_channel_clear_softhangup(c1, AST_SOFTHANGUP_UNBRIDGE);
         }
         ast_channel_lock_both(c0, c1);
         c0->_bridge = c1;
         c1->_bridge = c0;
         ast_channel_unlock(c0);
         ast_channel_unlock(c1);
         ast_debug(1, "Unbridge signal received. Ending native bridge.\n");
         continue;
      }

      /* Stop if we're a zombie or need a soft hangup */
      if (ast_test_flag(c0, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c0) ||
          ast_test_flag(c1, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c1)) {
         *fo = NULL;
         res = 0;
         ast_debug(1, "Bridge stops because we're zombie or need a soft hangup: c0=%s, c1=%s, flags: %s,%s,%s,%s\n",
            c0->name, c1->name,
            ast_test_flag(c0, AST_FLAG_ZOMBIE) ? "Yes" : "No",
            ast_check_hangup(c0) ? "Yes" : "No",
            ast_test_flag(c1, AST_FLAG_ZOMBIE) ? "Yes" : "No",
            ast_check_hangup(c1) ? "Yes" : "No");
         break;
      }

      update_bridge_vars(c0, c1);

      bridge_play_sounds(c0, c1);

      if (c0->tech->bridge &&
         /* if < 1 ms remains use generic bridging for accurate timing */
         (!config->timelimit || to > 1000 || to == 0) &&
          (c0->tech->bridge == c1->tech->bridge) &&
          !c0->monitor && !c1->monitor &&
          !c0->audiohooks && !c1->audiohooks &&
          ast_framehook_list_is_empty(c0->framehooks) && ast_framehook_list_is_empty(c1->framehooks) &&
          !c0->masq && !c0->masqr && !c1->masq && !c1->masqr) {
         int timeoutms = to - 1000 > 0 ? to - 1000 : to;
         /* Looks like they share a bridge method and nothing else is in the way */
         ast_set_flag(c0, AST_FLAG_NBRIDGE);
         ast_set_flag(c1, AST_FLAG_NBRIDGE);
         if ((res = c0->tech->bridge(c0, c1, config->flags, fo, rc, timeoutms)) == AST_BRIDGE_COMPLETE) {
            ast_manager_event_multichan(EVENT_FLAG_CALL, "Unlink", 2, chans,
               "Channel1: %s\r\n"
               "Channel2: %s\r\n"
               "Uniqueid1: %s\r\n"
               "Uniqueid2: %s\r\n"
               "CallerID1: %s\r\n"
               "CallerID2: %s\r\n",
               c0->name, c1->name,
               c0->uniqueid, c1->uniqueid,
               S_COR(c0->caller.id.number.valid, c0->caller.id.number.str, "<unknown>"),
               S_COR(c1->caller.id.number.valid, c1->caller.id.number.str, "<unknown>"));

            ast_debug(1, "Returning from native bridge, channels: %s, %s\n", c0->name, c1->name);

            ast_clear_flag(c0, AST_FLAG_NBRIDGE);
            ast_clear_flag(c1, AST_FLAG_NBRIDGE);

            if ((c0->_softhangup | c1->_softhangup) & AST_SOFTHANGUP_UNBRIDGE) {/* Bit operators are intentional. */
               continue;
            }

            ast_channel_lock_both(c0, c1);
            c0->_bridge = NULL;
            c1->_bridge = NULL;
            ast_channel_unlock(c0);
            ast_channel_unlock(c1);
            return res;
         } else {
            ast_clear_flag(c0, AST_FLAG_NBRIDGE);
            ast_clear_flag(c1, AST_FLAG_NBRIDGE);
         }
         switch (res) {
         case AST_BRIDGE_RETRY:
            if (config->play_warning) {
               ast_set_flag(config, AST_FEATURE_WARNING_ACTIVE);
            }
            continue;
         default:
            ast_verb(3, "Native bridging %s and %s ended\n", c0->name, c1->name);
            /* fallthrough */
         case AST_BRIDGE_FAILED_NOWARN:
            break;
         }
      }

      if (((c0->writeformat != c1->readformat) || (c0->readformat != c1->writeformat) ||
          (c0->nativeformats != o0nativeformats) || (c1->nativeformats != o1nativeformats)) &&
          !(c0->generator || c1->generator)) {
         if (ast_channel_make_compatible(c0, c1)) {
            ast_log(LOG_WARNING, "Can't make %s and %s compatible\n", c0->name, c1->name);
            manager_bridge_event(0, 1, c0, c1);
            return AST_BRIDGE_FAILED;
         }
         o0nativeformats = c0->nativeformats;
         o1nativeformats = c1->nativeformats;
      }

      update_bridge_vars(c0, c1);

      res = ast_generic_bridge(c0, c1, config, fo, rc);
      if (res != AST_BRIDGE_RETRY) {
         break;
      } else if (config->feature_timer) {
         /* feature timer expired but has not been updated, sending to ast_bridge_call to do so */
         break;
      }
   }

   ast_clear_flag(c0, AST_FLAG_END_DTMF_ONLY);
   ast_clear_flag(c1, AST_FLAG_END_DTMF_ONLY);

   /* Now that we have broken the bridge the source will change yet again */
   ast_indicate(c0, AST_CONTROL_SRCUPDATE);
   ast_indicate(c1, AST_CONTROL_SRCUPDATE);

   ast_channel_lock_both(c0, c1);
   c0->_bridge = NULL;
   c1->_bridge = NULL;
   ast_channel_unlock(c0);
   ast_channel_unlock(c1);

   ast_manager_event_multichan(EVENT_FLAG_CALL, "Unlink", 2, chans,
      "Channel1: %s\r\n"
      "Channel2: %s\r\n"
      "Uniqueid1: %s\r\n"
      "Uniqueid2: %s\r\n"
      "CallerID1: %s\r\n"
      "CallerID2: %s\r\n",
      c0->name, c1->name,
      c0->uniqueid, c1->uniqueid,
      S_COR(c0->caller.id.number.valid, c0->caller.id.number.str, "<unknown>"),
      S_COR(c1->caller.id.number.valid, c1->caller.id.number.str, "<unknown>"));
   ast_debug(1, "Bridge stops bridging channels %s and %s\n", c0->name, c1->name);

   return res;
}

struct ast_channel* ast_channel_callback	(	ao2_callback_data_fn *	cb_fn,
		void *	arg,
		void *	data,
		int	ao2_flags
	)			[read]

Call a function with every active channel.

This function executes a callback one time for each active channel on the system. The channel is provided as an argument to the function.

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Since:

1.8

Definition at line 1634 of file channel.c.

References ao2_callback_data, and channels.

Referenced by ast_pickup_call(), handle_core_set_debug_channel(), my_ast_get_channel_by_name_locked(), pickup_by_group(), pickup_by_mark(), pickup_by_part(), and state_notify_build_xml().

{
   return ao2_callback_data(channels, ao2_flags, cb_fn, arg, data);
}

int ast_channel_cc_params_init	(	struct ast_channel *	chan,
		const struct ast_cc_config_params *	base_params
	)

Set up datastore with CCSS parameters for a channel.

Since:

1.8

Note:

If base_params is NULL, the channel will get the default values for all CCSS parameters.

This function makes use of datastore operations on the channel, so it is important to lock the channel before calling this function.

Parameters:

	chan	The channel to create the datastore on
	base_params	CCSS parameters we wish to copy into the channel

Return values:

	0	Success
	-1	Failure

Definition at line 9674 of file channel.c.

References ast_cc_config_params_destroy(), ast_cc_config_params_init, ast_cc_copy_config_params(), ast_channel_datastore_add(), ast_datastore_alloc, and ast_datastore::data.

Referenced by ast_channel_get_cc_config_params(), dahdi_new(), local_call(), local_request(), and sip_new().

{
   struct ast_cc_config_params *cc_params;
   struct ast_datastore *cc_datastore;

   if (!(cc_params = ast_cc_config_params_init())) {
      return -1;
   }

   if (!(cc_datastore = ast_datastore_alloc(&cc_channel_datastore_info, NULL))) {
      ast_cc_config_params_destroy(cc_params);
      return -1;
   }

   if (base_params) {
      ast_cc_copy_config_params(cc_params, base_params);
   }
   cc_datastore->data = cc_params;
   ast_channel_datastore_add(chan, cc_datastore);
   return 0;
}

void ast_channel_clear_softhangup	(	struct ast_channel *	chan,
		int	flag
	)

Clear a set of softhangup flags from a channel.

Never clear a softhangup flag from a channel directly. Instead, use this function. This ensures that all aspects of the softhangup process are aborted.

Parameters:

	chan	the channel to clear the flag on
	flag	the flag or flags to clear

Returns:

Nothing.

Definition at line 2707 of file channel.c.

References ast_channel::_softhangup, ast_channel_lock, ast_channel_unlock, AST_CONTROL_END_OF_Q, AST_FRAME_CONTROL, ast_frfree, AST_LIST_LAST, AST_LIST_REMOVE, ast_frame::frametype, ast_frame_subclass::integer, and ast_frame::subclass.

Referenced by __ast_pbx_run(), ast_channel_bridge(), ast_generic_bridge(), check_goto_on_transfer(), and collect_digits().

{
   ast_channel_lock(chan);

   chan->_softhangup &= ~flag;

   if (!chan->_softhangup) {
      struct ast_frame *fr;

      /* If we have completely cleared the softhangup flag,
       * then we need to fully abort the hangup process.  This requires
       * pulling the END_OF_Q frame out of the channel frame queue if it
       * still happens to be there. */

      fr = AST_LIST_LAST(&chan->readq);
      if (fr && fr->frametype == AST_FRAME_CONTROL &&
            fr->subclass.integer == AST_CONTROL_END_OF_Q) {
         AST_LIST_REMOVE(&chan->readq, fr, frame_list);
         ast_frfree(fr);
      }
   }

   ast_channel_unlock(chan);
}

int ast_channel_cmpwhentohangup	(	struct ast_channel *	chan,
		time_t	offset
	)

Compare a offset with the settings of when to hang a channel up.

Parameters:

	chan	channel on which to check for hang up
	offset	offset in seconds from current time

Returns:

1, 0, or -1

This function compares a offset from current time with the absolute time out on a channel (when to hang up). If the absolute time out on a channel is earlier than current time plus the offset, it returns 1, if the two time values are equal, it return 0, otherwise, it return -1.

See also:

ast_channel_cmpwhentohangup_tv()

Version:

1.6.1 deprecated function (only had seconds precision)

Definition at line 900 of file channel.c.

References ast_channel_cmpwhentohangup_tv().

{
   struct timeval when = { offset, };
   return ast_channel_cmpwhentohangup_tv(chan, when);
}

int ast_channel_cmpwhentohangup_tv	(	struct ast_channel *	chan,
		struct timeval	offset
	)

Compare a offset with the settings of when to hang a channel up.

Parameters:

	chan	channel on which to check for hangup
	offset	offset in seconds and microseconds from current time

Returns:

1, 0, or -1 This function compares a offset from current time with the absolute time out on a channel (when to hang up). If the absolute time out on a channel is earlier than current time plus the offset, it returns 1, if the two time values are equal, it return 0, otherwise, it return -1.

Since:

1.6.1

Definition at line 885 of file channel.c.

References ast_tvadd(), ast_tvdiff_ms(), ast_tvnow(), ast_tvzero(), and ast_channel::whentohangup.

Referenced by ast_channel_cmpwhentohangup().

{
   struct timeval whentohangup;

   if (ast_tvzero(chan->whentohangup))
      return ast_tvzero(offset) ? 0 : -1;

   if (ast_tvzero(offset))
      return 1;

   whentohangup = ast_tvadd(offset, ast_tvnow());

   return ast_tvdiff_ms(whentohangup, chan->whentohangup);
}

int ast_channel_connected_line_macro	(	struct ast_channel *	autoservice_chan,
		struct ast_channel *	macro_chan,
		const void *	connected_info,
		int	caller,
		int	frame
	)

Run a connected line interception macro and update a channel's connected line information.

Since:

1.8 Whenever we want to update a channel's connected line information, we may need to run a macro so that an administrator can manipulate the information before sending it out. This function both runs the macro and sends the update to the channel.

Parameters:

	autoservice_chan	Channel to place into autoservice while the macro is running. It is perfectly safe for this to be NULL
	macro_chan	The channel to run the macro on. Also the channel from which we determine which macro we need to run.
	connected_info	Either an ast_party_connected_line or ast_frame pointer of type AST_CONTROL_CONNECTED_LINE
	caller	If true, then run CONNECTED_LINE_CALLER_SEND_MACRO, otherwise run CONNECTED_LINE_CALLEE_SEND_MACRO
	frame	If true, then connected_info is an ast_frame pointer, otherwise it is an ast_party_connected_line pointer.

Return values:

	0	Success
	-1	Either the macro does not exist, or there was an error while attempting to run the macro

Todo:

Have multiple return codes based on the MACRO_RESULT

Make constants so that caller and frame can be more expressive than just '1' and '0'

Definition at line 9561 of file channel.c.

References ast_app_run_macro(), ast_channel_lock, ast_channel_unlock, ast_channel_update_connected_line(), ast_connected_line_parse_data(), ast_party_connected_line_copy(), ast_party_connected_line_free(), ast_party_connected_line_init(), ast_strdupa, ast_strlen_zero(), chanlist::connected, ast_channel::connected, ast_frame::data, ast_frame::datalen, pbx_builtin_getvar_helper(), ast_frame::ptr, and S_OR.

Referenced by __ast_read(), app_exec(), ast_bridge_call(), ast_do_pickup(), ast_generic_bridge(), atxfer_fail_cleanup(), builtin_atxfer(), feature_request_and_dial(), handle_frame(), local_bridge_loop(), parked_call_exec(), remote_bridge_loop(), and wait_for_answer().

{
   const char *macro;
   const char *macro_args;
   int retval;

   ast_channel_lock(macro_chan);
   macro = pbx_builtin_getvar_helper(macro_chan, is_caller
      ? "CONNECTED_LINE_CALLER_SEND_MACRO" : "CONNECTED_LINE_CALLEE_SEND_MACRO");
   macro = ast_strdupa(S_OR(macro, ""));
   macro_args = pbx_builtin_getvar_helper(macro_chan, is_caller
      ? "CONNECTED_LINE_CALLER_SEND_MACRO_ARGS" : "CONNECTED_LINE_CALLEE_SEND_MACRO_ARGS");
   macro_args = ast_strdupa(S_OR(macro_args, ""));

   if (ast_strlen_zero(macro)) {
      ast_channel_unlock(macro_chan);
      return -1;
   }

   if (is_frame) {
      const struct ast_frame *frame = connected_info;

      ast_connected_line_parse_data(frame->data.ptr, frame->datalen, &macro_chan->connected);
   } else {
      const struct ast_party_connected_line *connected = connected_info;

      ast_party_connected_line_copy(&macro_chan->connected, connected);
   }
   ast_channel_unlock(macro_chan);

   retval = ast_app_run_macro(autoservice_chan, macro_chan, macro, macro_args);
   if (!retval) {
      struct ast_party_connected_line saved_connected;

      ast_party_connected_line_init(&saved_connected);
      ast_channel_lock(macro_chan);
      ast_party_connected_line_copy(&saved_connected, &macro_chan->connected);
      ast_channel_unlock(macro_chan);
      ast_channel_update_connected_line(macro_chan, &saved_connected, NULL);
      ast_party_connected_line_free(&saved_connected);
   }

   return retval;
}

int ast_channel_data_add_structure	(	struct ast_data *	tree,
		struct ast_channel *	chan,
		int	add_bridged
	)

Insert into an astdata tree, the channel structure.

Parameters:

[in]	tree	The ast data tree.
[in]	chan	The channel structure to add to tree.
[in]	add_bridged	Add the bridged channel to the structure.

Return values:

	<0	on error.
	0	on success.

Definition at line 357 of file channel.c.

References ast_channel::_softhangup, ast_channel::_state, ast_channel::amaflags, ast_bridged_channel(), ast_cause2str(), ast_cdr_data_add_structure(), ast_cdr_flags2str(), ast_channel_data_add_structure(), ast_data_add_bool(), ast_data_add_codecs(), ast_data_add_int(), ast_data_add_node(), ast_data_add_str(), ast_data_add_structure, ast_data_add_uint(), AST_SOFTHANGUP_APPUNLOAD, AST_SOFTHANGUP_ASYNCGOTO, AST_SOFTHANGUP_DEV, AST_SOFTHANGUP_EXPLICIT, AST_SOFTHANGUP_SHUTDOWN, AST_SOFTHANGUP_TIMEOUT, AST_SOFTHANGUP_UNBRIDGE, ast_state2str(), ast_tone_zone_data_add_structure(), ast_transfercapability2str(), ast_channel::cdr, channel_data_add_flags(), ast_channel::hangupcause, ast_channel::nativeformats, ast_channel::oldwriteformat, ast_channel::rawreadformat, ast_channel::rawwriteformat, ast_channel::readformat, ast_channel::transfercapability, ast_channel::whentohangup, ast_channel::writeformat, and ast_channel::zone.

Referenced by agents_data_provider_get(), ast_channel_data_add_structure(), data_channels_provider_handler(), queues_data_provider_get_helper(), and user_add_provider_cb().

{
   struct ast_channel *bc;
   struct ast_data *data_bridged;
   struct ast_data *data_cdr;
   struct ast_data *data_flags;
   struct ast_data *data_zones;
   struct ast_data *enum_node;
   struct ast_data *data_softhangup;
#if 0 /* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
   struct ast_data *data_callerid;
   char value_str[100];
#endif

   if (!tree) {
      return -1;
   }

   ast_data_add_structure(ast_channel, tree, chan);

   if (add_bridged) {
      bc = ast_bridged_channel(chan);
      if (bc) {
         data_bridged = ast_data_add_node(tree, "bridged");
         if (!data_bridged) {
            return -1;
         }
         ast_channel_data_add_structure(data_bridged, bc, 0);
      }
   }

   ast_data_add_codecs(tree, "oldwriteformat", chan->oldwriteformat);
   ast_data_add_codecs(tree, "nativeformats", chan->nativeformats);
   ast_data_add_codecs(tree, "readformat", chan->readformat);
   ast_data_add_codecs(tree, "writeformat", chan->writeformat);
   ast_data_add_codecs(tree, "rawreadformat", chan->rawreadformat);
   ast_data_add_codecs(tree, "rawwriteformat", chan->rawwriteformat);

   /* state */
   enum_node = ast_data_add_node(tree, "state");
   if (!enum_node) {
      return -1;
   }
   ast_data_add_str(enum_node, "text", ast_state2str(chan->_state));
   ast_data_add_int(enum_node, "value", chan->_state);

   /* hangupcause */
   enum_node = ast_data_add_node(tree, "hangupcause");
   if (!enum_node) {
      return -1;
   }
   ast_data_add_str(enum_node, "text", ast_cause2str(chan->hangupcause));
   ast_data_add_int(enum_node, "value", chan->hangupcause);

   /* amaflags */
   enum_node = ast_data_add_node(tree, "amaflags");
   if (!enum_node) {
      return -1;
   }
   ast_data_add_str(enum_node, "text", ast_cdr_flags2str(chan->amaflags));
   ast_data_add_int(enum_node, "value", chan->amaflags);

   /* transfercapability */
   enum_node = ast_data_add_node(tree, "transfercapability");
   if (!enum_node) {
      return -1;
   }
   ast_data_add_str(enum_node, "text", ast_transfercapability2str(chan->transfercapability));
   ast_data_add_int(enum_node, "value", chan->transfercapability);

   /* _softphangup */
   data_softhangup = ast_data_add_node(tree, "softhangup");
   if (!data_softhangup) {
      return -1;
   }
   ast_data_add_bool(data_softhangup, "dev", chan->_softhangup & AST_SOFTHANGUP_DEV);
   ast_data_add_bool(data_softhangup, "asyncgoto", chan->_softhangup & AST_SOFTHANGUP_ASYNCGOTO);
   ast_data_add_bool(data_softhangup, "shutdown", chan->_softhangup & AST_SOFTHANGUP_SHUTDOWN);
   ast_data_add_bool(data_softhangup, "timeout", chan->_softhangup & AST_SOFTHANGUP_TIMEOUT);
   ast_data_add_bool(data_softhangup, "appunload", chan->_softhangup & AST_SOFTHANGUP_APPUNLOAD);
   ast_data_add_bool(data_softhangup, "explicit", chan->_softhangup & AST_SOFTHANGUP_EXPLICIT);
   ast_data_add_bool(data_softhangup, "unbridge", chan->_softhangup & AST_SOFTHANGUP_UNBRIDGE);

   /* channel flags */
   data_flags = ast_data_add_node(tree, "flags");
   if (!data_flags) {
      return -1;
   }
   channel_data_add_flags(data_flags, chan);

   ast_data_add_uint(tree, "timetohangup", chan->whentohangup.tv_sec);

#if 0 /* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
   /* callerid */
   data_callerid = ast_data_add_node(tree, "callerid");
   if (!data_callerid) {
      return -1;
   }
   ast_data_add_structure(ast_callerid, data_callerid, &(chan->cid));
   /* insert the callerid ton */
   enum_node = ast_data_add_node(data_callerid, "cid_ton");
   if (!enum_node) {
      return -1;
   }
   ast_data_add_int(enum_node, "value", chan->cid.cid_ton);
   snprintf(value_str, sizeof(value_str), "TON: %s/Plan: %s",
      party_number_ton2str(chan->cid.cid_ton),
      party_number_plan2str(chan->cid.cid_ton));
   ast_data_add_str(enum_node, "text", value_str);
#endif

   /* tone zone */
   if (chan->zone) {
      data_zones = ast_data_add_node(tree, "zone");
      if (!data_zones) {
         return -1;
      }
      ast_tone_zone_data_add_structure(data_zones, chan->zone);
   }

   /* insert cdr */
   data_cdr = ast_data_add_node(tree, "cdr");
   if (!data_cdr) {
      return -1;
   }

   ast_cdr_data_add_structure(data_cdr, chan->cdr, 1);

   return 0;
}

int ast_channel_data_cmp_structure	(	const struct ast_data_search *	tree,
		struct ast_channel *	chan,
		const char *	structure_name
	)

Compare to channel structures using the data api.

Parameters:

[in]	tree	The search tree generated by the data api.
[in]	chan	The channel to compare.
[in]	structure_name	The name of the node of the channel structure.

Return values:

	0	The structure matches.
	1	The structure doesn't matches.

Definition at line 489 of file channel.c.

References ast_data_search_cmp_structure.

{
   return ast_data_search_cmp_structure(tree, ast_channel, chan, structure_name);
}

int ast_channel_datastore_add	(	struct ast_channel *	chan,
		struct ast_datastore *	datastore
	)

Add a datastore to a channel.

Note:

The channel should be locked before calling this function.

Return values:

	0	success
	non-zero	failure

Definition at line 2590 of file channel.c.

References AST_LIST_INSERT_HEAD.

Referenced by __ast_channel_masquerade(), _macro_exec(), acf_curlopt_write(), acf_iaxvar_write(), acf_odbc_read(), add_features_datastore(), add_to_agi(), apply_plc(), ast_cel_fabricate_channel_from_event(), ast_channel_cc_params_init(), ast_do_pickup(), ast_iax2_new(), ast_setup_cc_recall_datastore(), audiohook_volume_get(), authenticate_reply(), calendar_query_exec(), cc_interfaces_datastore_init(), dial_exec_full(), do_notify(), dundi_query_read(), enable_jack_hook(), enum_query_read(), find_or_create_details(), find_transaction(), frame_trace_helper(), func_channel_write_real(), get_lock(), gosub_exec(), lua_get_state(), mute_add_audiohook(), pitchshift_helper(), raise_exception(), set_chan_app_data(), setup_inheritance_datastore(), setup_mixmonitor_ds(), setup_transfer_datastore(), shared_write(), smdi_msg_retrieve_read(), socket_process(), speech_create(), speex_write(), srv_datastore_setup(), try_calling(), and volume_write().

{
   int res = 0;

   AST_LIST_INSERT_HEAD(&chan->datastores, datastore, entry);

   return res;
}

struct ast_datastore* attribute_malloc ast_channel_datastore_alloc	(	const struct ast_datastore_info *	info,
		const char *	uid
	)			[read]

Create a channel data store object.

Note:

None of the datastore API calls lock the ast_channel they are using. So, the channel should be locked before calling the functions that take a channel argument.

Deprecated:

You should use the ast_datastore_alloc() generic function instead.

Version:

1.6.1 deprecated

Definition at line 2563 of file channel.c.

References ast_datastore_alloc.

{
   return ast_datastore_alloc(info, uid);
}

struct ast_datastore* ast_channel_datastore_find	(	struct ast_channel *	chan,
		const struct ast_datastore_info *	info,
		const char *	uid
	)			[read]

Find a datastore on a channel.

Note:

The channel should be locked before calling this function.

The datastore returned from this function must not be used if the reference to the channel is released.

Return values:

	pointer	to the datastore if found
	NULL	if not found

Definition at line 2604 of file channel.c.

References AST_LIST_TRAVERSE, ast_datastore::info, and ast_datastore::uid.

Referenced by _macro_exec(), acf_curl_helper(), acf_curlopt_helper(), acf_curlopt_write(), acf_exception_read(), acf_fetch(), acf_iaxvar_read(), acf_iaxvar_write(), acf_odbc_read(), add_agi_cmd(), add_features_datastore(), add_to_agi(), apply_plc(), ast_can_pickup(), ast_cc_agent_set_interfaces_chanvar(), ast_cc_call_init(), ast_cc_completed(), ast_cc_extension_monitor_add_dialstring(), ast_cc_get_current_core_id(), ast_cc_is_recall(), ast_cc_offer(), ast_channel_get_cc_config_params(), ast_do_masquerade(), ast_handle_cc_control_frame(), ast_ignore_cc(), ast_odbc_retrieve_transaction_obj(), ast_set_cc_interfaces_chanvar(), attended_transfer_occurred(), audiohook_volume_callback(), audiohook_volume_get(), builtin_atxfer(), calendar_event_read(), calendar_query_exec(), calendar_query_result_exec(), cc_build_payload(), clear_dialed_interfaces(), dial_exec_full(), disable_jack_hook(), dundi_result_read(), enable_jack_hook(), enum_result_read(), exec_odbcfinish(), find_details(), find_speech(), find_transaction(), frame_trace_helper(), func_channel_read(), func_channel_write_real(), func_inheritance_write(), func_mute_write(), get_agi_cmd(), get_lock(), gosub_exec(), handle_gosub(), iax2_call(), jack_hook_callback(), local_read(), local_write(), lock_fixup(), lua_get_state(), manage_parked_call(), manager_mutestream(), mark_transaction_active(), mute_callback(), parked_call_exec(), pitchshift_cb(), pitchshift_helper(), pop_exec(), queue_transfer_fixup(), raise_exception(), release_transaction(), return_exec(), set_security_requirements(), shared_read(), shared_write(), smdi_msg_read(), speech_background(), speech_destroy(), speex_callback(), speex_read(), speex_write(), srv_query_read(), srv_result_read(), stackpeek_read(), stop_mixmonitor_exec(), try_calling(), unlock_read(), volume_callback(), and volume_write().

{
   struct ast_datastore *datastore = NULL;
   
   if (info == NULL)
      return NULL;

   AST_LIST_TRAVERSE(&chan->datastores, datastore, entry) {
      if (datastore->info != info) {
         continue;
      }

      if (uid == NULL) {
         /* matched by type only */
         break;
      }

      if ((datastore->uid != NULL) && !strcasecmp(uid, datastore->uid)) {
         /* Matched by type AND uid */
         break;
      }
   }

   return datastore;
}

int ast_channel_datastore_free

(

struct ast_datastore *

datastore

)

Free a channel data store object.

Deprecated:

You should use the ast_datastore_free() generic function instead.

Version:

1.6.1 deprecated

Definition at line 2568 of file channel.c.

References ast_datastore_free().

{
   return ast_datastore_free(datastore);
}

int ast_channel_datastore_inherit	(	struct ast_channel *	from,
		struct ast_channel *	to
	)

Inherit datastores from a parent to a child.

Definition at line 2573 of file channel.c.

References ast_datastore_alloc, AST_LIST_INSERT_TAIL, AST_LIST_TRAVERSE, ast_datastore::data, DATASTORE_INHERIT_FOREVER, ast_datastore_info::duplicate, ast_datastore::info, ast_datastore::inheritance, and ast_datastore::uid.

Referenced by __ast_request_and_dial(), begin_dial_channel(), call_forward_inherit(), dial_exec_full(), dial_transfer(), do_forward(), findmeexec(), local_call(), ring_entry(), and wait_for_answer().

{
   struct ast_datastore *datastore = NULL, *datastore2;

   AST_LIST_TRAVERSE(&from->datastores, datastore, entry) {
      if (datastore->inheritance > 0) {
         datastore2 = ast_datastore_alloc(datastore->info, datastore->uid);
         if (datastore2) {
            datastore2->data = datastore->info->duplicate ? datastore->info->duplicate(datastore->data) : NULL;
            datastore2->inheritance = datastore->inheritance == DATASTORE_INHERIT_FOREVER ? DATASTORE_INHERIT_FOREVER : datastore->inheritance - 1;
            AST_LIST_INSERT_TAIL(&to->datastores, datastore2, entry);
         }
      }
   }
   return 0;
}

int ast_channel_datastore_remove	(	struct ast_channel *	chan,
		struct ast_datastore *	datastore
	)

Remove a datastore from a channel.

Note:

The channel should be locked before calling this function.

Return values:

	0	success
	non-zero	failure

Definition at line 2599 of file channel.c.

References AST_LIST_REMOVE.

Referenced by acf_fetch(), acf_odbc_read(), adjust_frame_for_plc(), ast_do_masquerade(), ast_do_pickup(), clear_dialed_interfaces(), dial_exec_full(), disable_jack_hook(), exec_odbcfinish(), frame_trace_helper(), lua_get_state(), queue_transfer_fixup(), speech_background(), speech_destroy(), speex_write(), srv_query_read(), stop_mixmonitor_exec(), and try_calling().

{
   return AST_LIST_REMOVE(&chan->datastores, datastore, entry) ? 0 : -1;
}

int ast_channel_defer_dtmf

(

struct ast_channel *

chan

)

Defers DTMF so that you only read things like hangups and audio.

Returns:

non-zero if channel was already DTMF-deferred or 0 if channel is just now being DTMF-deferred

Definition at line 1616 of file channel.c.

References AST_FLAG_DEFER_DTMF, ast_set_flag, and ast_test_flag.

Referenced by __adsi_transmit_messages(), and find_cache().

{
   int pre = 0;

   if (chan) {
      pre = ast_test_flag(chan, AST_FLAG_DEFER_DTMF);
      ast_set_flag(chan, AST_FLAG_DEFER_DTMF);
   }
   return pre;
}

int ast_channel_early_bridge	(	struct ast_channel *	c0,
		struct ast_channel *	c1
	)

Bridge two channels together (early).

Parameters:

	c0	first channel to bridge
	c1	second channel to bridge

Bridge two channels (c0 and c1) together early. This implies either side may not be answered yet.

Returns:

Returns 0 on success and -1 if it could not be done

Definition at line 7349 of file channel.c.

References ast_channel_tech::early_bridge, and ast_channel::tech.

Referenced by dial_exec_full(), and wait_for_answer().

{
   /* Make sure we can early bridge, if not error out */
   if (!c0->tech->early_bridge || (c1 && (!c1->tech->early_bridge || c0->tech->early_bridge != c1->tech->early_bridge)))
      return -1;

   return c0->tech->early_bridge(c0, c1);
}

struct ast_channel* ast_channel_get_by_exten	(	const char *	exten,
		const char *	context
	)			[read]

Find a channel by extension and context.

• exten the extension to search for
• context the context to search for (optional)

Return a channel that is currently at the specified extension and context.

Return values:

	a	channel that is at the specified extension and context
	NULL	if no channel was found

Since:

1.8

Definition at line 1813 of file channel.c.

References ast_channel_get_full().

{
   return ast_channel_get_full(NULL, 0, exten, context);
}

struct ast_channel* ast_channel_get_by_name

(

const char *

name

)

[read]

Find a channel by name.

Channel search functions

• name the name or uniqueid of the channel to search for

Find a channel that has the same name as the provided argument.

Return values:

	a	channel with the name specified by the argument
	NULL	if no channel was found

Since:

1.8

Definition at line 1803 of file channel.c.

References ast_channel_get_full().

Referenced by action_add_agi_cmd(), action_aocmessage(), action_atxfer(), action_getvar(), action_hangup(), action_redirect(), action_sendtext(), action_setvar(), action_status(), action_timeout(), ast_async_goto_by_name(), ast_bridge_call(), asyncgoto_exec(), change_monitor_action(), do_pause_or_unpause(), func_mchan_read(), func_mchan_write(), handle_channelstatus(), handle_cli_agi_add_cmd(), handle_core_set_debug_channel(), handle_getvariablefull(), handle_hangup(), handle_redirect(), handle_set_chanvar(), handle_show_chanvar(), handle_showchan(), handle_softhangup(), import_helper(), manager_mute_mixmonitor(), manager_mutestream(), manager_optimize_away(), manager_park(), manager_play_dtmf(), park_call_full(), pbx_builtin_importvar(), senddtmf_exec(), shared_read(), shared_write(), start_monitor_action(), and stop_monitor_action().

{
   return ast_channel_get_full(name, 0, NULL, NULL);
}

struct ast_channel* ast_channel_get_by_name_prefix	(	const char *	name,
		size_t	name_len
	)			[read]

Find a channel by a name prefix.

• name The channel name or uniqueid prefix to search for
• name_len Only search for up to this many characters from the name

Find a channel that has the same name prefix as specified by the arguments.

Return values:

	a	channel with the name prefix specified by the arguments
	NULL	if no channel was found

Since:

1.8

Definition at line 1808 of file channel.c.

References ast_channel_get_full().

Referenced by action_aocmessage(), action_bridge(), ast_parse_device_state(), bridge_exec(), cc_generic_agent_stop_ringing(), common_exec(), handle_cli_mixmonitor(), shared_read(), and shared_write().

{
   return ast_channel_get_full(name, name_len, NULL, NULL);
}

int ast_channel_get_cc_agent_type	(	struct ast_channel *	chan,
		char *	agent_type,
		size_t	size
	)

Find the appropriate CC agent type to use given a channel.

Since:

1.8

During call completion, we will need to create a call completion agent structure. To figure out the type of agent to construct, we need to ask the channel driver for the appropriate type.

Prior to adding this function, the call completion core attempted to figure this out for itself by stripping the technology off the channel's name. However, in the case of chan_dahdi, there are multiple agent types registered, and so simply searching for an agent type called "DAHDI" is not possible. In a case where multiple agent types are defined, the channel driver must have a queryoption callback defined in its channel_tech, and the queryoption callback must handle AST_OPTION_CC_AGENT_TYPE

If a channel driver does not have a queryoption callback or if the queryoption callback does not handle AST_OPTION_CC_AGENT_TYPE, then the old behavior of using the technology portion of the channel name is used instead. This is perfectly suitable for channel drivers whose channel technologies are a one-to-one match with the agent types defined within.

Note that this function is only called when the agent policy on a given channel is set to "native." Generic agents' type can be determined automatically by the core.

Parameters:

	chan	The channel for which we wish to retrieve the agent type
[out]	agent_type	The type of agent the channel driver wants us to use
	size	The size of the buffer to write to

Definition at line 9736 of file channel.c.

References ast_channel_queryoption(), ast_copy_string(), and AST_OPTION_CC_AGENT_TYPE.

Referenced by find_agent_callbacks().

{
   int len = size;
   char *slash;

   if (!ast_channel_queryoption(chan, AST_OPTION_CC_AGENT_TYPE, agent_type, &len, 0)) {
      return 0;
   }

   ast_copy_string(agent_type, chan->name, size);
   if ((slash = strchr(agent_type, '/'))) {
      *slash = '\0';
   }
   return 0;
}

struct ast_cc_config_params* ast_channel_get_cc_config_params

(

struct ast_channel *

chan

)

[read]

Get the CCSS parameters from a channel.

Since:

1.8

This function makes use of datastore operations on the channel, so it is important to lock the channel before calling this function.

Parameters:

chan

Channel to retrieve parameters from

Return values:

	NULL	Failure
	non-NULL	The parameters desired

Definition at line 9697 of file channel.c.

References ast_assert, ast_channel_cc_params_init(), ast_channel_datastore_find(), and ast_datastore::data.

Referenced by acf_cc_read(), acf_cc_write(), analog_call(), ast_cc_call_failed(), ast_cc_call_init(), ast_queue_cc_frame(), cc_agent_init(), cc_core_init_instance(), find_agent_callbacks(), local_call(), and local_request().

{
   struct ast_datastore *cc_datastore;

   if (!(cc_datastore = ast_channel_datastore_find(chan, &cc_channel_datastore_info, NULL))) {
      /* If we can't find the datastore, it almost definitely means that the channel type being
       * used has not had its driver modified to parse CC config parameters. The best action
       * to take here is to create the parameters on the spot with the defaults set.
       */
      if (ast_channel_cc_params_init(chan, NULL)) {
         return NULL;
      }
      if (!(cc_datastore = ast_channel_datastore_find(chan, &cc_channel_datastore_info, NULL))) {
         /* Should be impossible */
         return NULL;
      }
   }

   ast_assert(cc_datastore->data != NULL);
   return cc_datastore->data;
}

int ast_channel_get_device_name	(	struct ast_channel *	chan,
		char *	device_name,
		size_t	name_buffer_length
	)

Get a device name given its channel structure.

Since:

1.8

A common practice in Asterisk is to determine the device being talked to by dissecting the channel name. For certain channel types, this is not accurate. For instance, an ISDN channel is named based on what B channel is used, not the device being communicated with.

This function interfaces with a channel tech's queryoption callback to retrieve the name of the device being communicated with. If the channel does not implement this specific option, then the traditional method of using the channel name is used instead.

Parameters:

	chan	The channel to retrieve the information from
[out]	device_name	The buffer to place the device's name into
	name_buffer_length	The allocated space for the device_name

Returns:

0 always

Definition at line 9719 of file channel.c.

References ast_channel_queryoption(), ast_copy_string(), and AST_OPTION_DEVICE_NAME.

Referenced by ast_cc_call_failed(), ast_cc_is_recall(), ast_queue_cc_frame(), cc_core_init_instance(), cccancel_exec(), ccreq_exec(), dial_exec_full(), sip_call(), and sip_handle_cc().

{
   int len = name_buffer_length;
   char *dash;
   if (!ast_channel_queryoption(chan, AST_OPTION_DEVICE_NAME, device_name, &len, 0)) {
      return 0;
   }

   /* Dang. Do it the old-fashioned way */
   ast_copy_string(device_name, chan->name, name_buffer_length);
   if ((dash = strrchr(device_name, '-'))) {
      *dash = '\0';
   }

   return 0;
}

static enum ast_t38_state ast_channel_get_t38_state

(

struct ast_channel *

chan

)

[inline, static]

Retrieves the current T38 state of a channel.

Definition at line 2412 of file channel.h.

References ast_channel_queryoption(), AST_OPTION_T38_STATE, and T38_STATE_UNAVAILABLE.

Referenced by generic_fax_exec(), receivefax_exec(), receivefax_t38_init(), sendfax_exec(), sendfax_t38_init(), set_fax_t38_caps(), transmit(), transmit_audio(), and transmit_t38().

{
   enum ast_t38_state state = T38_STATE_UNAVAILABLE;
   int datalen = sizeof(state);

   ast_channel_queryoption(chan, AST_OPTION_T38_STATE, &state, &datalen, 0);

   return state;
}

void ast_channel_inherit_variables	(	const struct ast_channel *	parent,
		struct ast_channel *	child
	)

Inherits channel variable from parent to child channel.

Parameters:

	parent	Parent channel
	child	Child channel

Scans all channel variables in the parent channel, looking for those that should be copied into the child channel. Variables whose names begin with a single '_' are copied into the child channel with the prefix removed. Variables whose names begin with '__' are copied into the child channel with their names unchanged.

Definition at line 6198 of file channel.c.

References ast_debug, AST_LIST_INSERT_TAIL, AST_LIST_TRAVERSE, ast_var_assign(), ast_var_full_name(), ast_var_name(), ast_var_value(), and ast_channel::varshead.

Referenced by __ast_request_and_dial(), begin_dial_channel(), call_forward_inherit(), dial_exec_full(), dial_transfer(), do_forward(), feature_request_and_dial(), findmeexec(), ring_entry(), and wait_for_answer().

{
   struct ast_var_t *current, *newvar;
   const char *varname;

   AST_LIST_TRAVERSE(&parent->varshead, current, entries) {
      int vartype = 0;

      varname = ast_var_full_name(current);
      if (!varname)
         continue;

      if (varname[0] == '_') {
         vartype = 1;
         if (varname[1] == '_')
            vartype = 2;
      }

      switch (vartype) {
      case 1:
         newvar = ast_var_assign(&varname[1], ast_var_value(current));
         if (newvar) {
            AST_LIST_INSERT_TAIL(&child->varshead, newvar, entries);
            ast_debug(1, "Inheriting variable %s from %s to %s.\n",
               ast_var_name(newvar), parent->name, child->name);
         }
         break;
      case 2:
         newvar = ast_var_assign(varname, ast_var_value(current));
         if (newvar) {
            AST_LIST_INSERT_TAIL(&child->varshead, newvar, entries);
            ast_debug(1, "Inheriting variable %s from %s to %s.\n",
               ast_var_name(newvar), parent->name, child->name);
         }
         break;
      default:
         break;
      }
   }
}

struct ast_channel_iterator* ast_channel_iterator_all_new

(

void

)

[read]

Create a new channel iterator.

After creating an iterator using this function, the ast_channel_iterator_next() function can be used to iterate through all channels that exist.

Return values:

	NULL	on failure
	a	new channel iterator

Since:

1.8

Definition at line 1701 of file channel.c.

References ast_channel_iterator::active_iterator, ao2_iterator_init(), ast_calloc, channels, and ast_channel_iterator::simple_iterator.

Referenced by action_coreshowchannels(), action_status(), ast_complete_channels(), ast_var_channel_bridge(), ast_var_channel_types_table(), ast_var_channels_table(), common_exec(), data_channels_provider_handler(), func_channels_read(), handle_chanlist(), and handle_softhangup().

{
   struct ast_channel_iterator *i;

   if (!(i = ast_calloc(1, sizeof(*i)))) {
      return NULL;
   }

   i->simple_iterator = ao2_iterator_init(channels, 0);
   i->active_iterator = &i->simple_iterator;

   return i;
}

struct ast_channel_iterator* ast_channel_iterator_by_exten_new	(	const char *	exten,
		const char *	context
	)			[read]

Create a new channel iterator based on extension.

• exten The extension that channels must be in
• context The context that channels must be in (optional)

After creating an iterator using this function, the ast_channel_iterator_next() function can be used to iterate through all channels that are currently in the specified context and extension.

Return values:

	NULL	on failure
	a	new channel iterator based on the specified parameters

Since:

1.8

Definition at line 1691 of file channel.c.

References channel_iterator_search().

Referenced by common_exec(), and pickup_by_exten().

{
   return channel_iterator_search(NULL, 0, exten, context);
}

struct ast_channel_iterator* ast_channel_iterator_by_name_new	(	const char *	name,
		size_t	name_len
	)			[read]

Create a new channel iterator based on name.

• name channel name or channel uniqueid to match
• name_len number of characters in the channel name to match on. This would be used to match based on name prefix. If matching on the full channel name is desired, then this parameter should be 0.

After creating an iterator using this function, the ast_channel_iterator_next() function can be used to iterate through all channels that exist that have the specified name or name prefix.

Return values:

	NULL	on failure
	a	new channel iterator based on the specified parameters

Since:

1.8

Definition at line 1696 of file channel.c.

References channel_iterator_search().

Referenced by ast_complete_channels(), common_exec(), and softhangup_exec().

{
   return channel_iterator_search(name, name_len, NULL, NULL);
}

struct ast_channel_iterator* ast_channel_iterator_destroy

(

struct ast_channel_iterator *

i

)

[read]

Destroy a channel iterator.

• i the itereator to destroy

This function is used to destroy a channel iterator that was retrieved by using one of the channel_iterator_new() functions.

Returns:

NULL, for convenience to clear out the pointer to the iterator that was just destroyed.

Since:

1.8

Definition at line 1649 of file channel.c.

References ast_channel_iterator::active_iterator, ao2_iterator_destroy(), and ast_free.

Referenced by action_coreshowchannels(), action_status(), ast_complete_channels(), ast_var_channel_bridge(), ast_var_channel_types_table(), ast_var_channels_table(), common_exec(), data_channels_provider_handler(), func_channels_read(), handle_chanlist(), handle_softhangup(), pickup_by_exten(), and softhangup_exec().

{
   ao2_iterator_destroy(i->active_iterator);
   ast_free(i);

   return NULL;
}

struct ast_channel* ast_channel_iterator_next

(

struct ast_channel_iterator *

i

)

[read]

Get the next channel for a channel iterator.

• i the channel iterator that was created using one of the channel_iterator_new() functions.

This function should be used to iterate through all channels that match a specified set of parameters that were provided when the iterator was created.

Return values:

	the	next channel that matches the parameters used when the iterator was created.
	NULL,if	no more channels match the iterator parameters.

Since:

1.8

Definition at line 1715 of file channel.c.

References ast_channel_iterator::active_iterator, and ao2_iterator_next.

Referenced by action_coreshowchannels(), action_status(), ast_complete_channels(), ast_var_channel_bridge(), ast_var_channel_types_table(), ast_var_channels_table(), data_channels_provider_handler(), func_channels_read(), handle_chanlist(), handle_softhangup(), next_channel(), pickup_by_exten(), and softhangup_exec().

{
   return ao2_iterator_next(i->active_iterator);
}

int ast_channel_make_compatible	(	struct ast_channel *	c0,
		struct ast_channel *	c1
	)

Makes two channel formats compatible.

Parameters:

	c0	first channel to make compatible
	c1	other channel to make compatible

Set two channels to compatible formats -- call before ast_channel_bridge in general.

Returns:

Returns 0 on success and -1 if it could not be done

Definition at line 5927 of file channel.c.

References ast_channel_make_compatible_helper().

Referenced by action_bridge(), app_exec(), ast_channel_bridge(), bridge_exec(), check_compat(), dial_exec_full(), do_forward(), multiplexed_bridge_join(), parked_call_exec(), simple_bridge_join(), try_calling(), and wait_for_answer().

{
   /* Some callers do not check return code, and we must try to set all call legs correctly */
   int rc = 0;

   /* Set up translation from the chan to the peer */
   rc = ast_channel_make_compatible_helper(chan, peer);

   if (rc < 0)
      return rc;

   /* Set up translation from the peer to the chan */
   rc = ast_channel_make_compatible_helper(peer, chan);

   return rc;
}

int ast_channel_masquerade	(	struct ast_channel *	original,
		struct ast_channel *	clone
	)

Weird function made for call transfers.

Parameters:

	original	channel to make a copy of
	clone	copy of the original channel

This is a very strange and freaky function used primarily for transfer. Suppose that "original" and "clone" are two channels in random situations. This function takes the guts out of "clone" and puts them into the "original" channel, then alerts the channel driver of the change, asking it to fixup any private information (like the p->owner pointer) that is affected by the change. The physical layer of the original channel is hung up.

Note:

Neither channel passed here should be locked before calling this function. This function performs deadlock avoidance involving these two channels.

Definition at line 6067 of file channel.c.

References __ast_channel_masquerade().

Referenced by ast_async_goto(), ast_do_pickup(), attempt_transfer(), builtin_atxfer(), check_availability(), check_bridge(), check_goto_on_transfer(), do_bridge_masquerade(), handle_invite_replaces(), iax_park(), masq_park_call(), sip_park(), and skinny_transfer().

{
   return __ast_channel_masquerade(original, clone, NULL);
}

int ast_channel_queryoption	(	struct ast_channel *	channel,
		int	option,
		void *	data,
		int *	datalen,
		int	block
	)

Checks the value of an option.

Query the value of an option Works similarly to setoption except only reads the options.

Definition at line 7753 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_log(), errno, LOG_ERROR, ast_channel_tech::queryoption, and ast_channel::tech.

Referenced by ast_channel_get_cc_agent_type(), ast_channel_get_device_name(), ast_channel_get_t38_state(), local_queryoption(), rcvfax_exec(), and sndfax_exec().

{
   int res;

   ast_channel_lock(chan);
   if (!chan->tech->queryoption) {
      errno = ENOSYS;
      ast_channel_unlock(chan);
      return -1;
   }

   if (block)
      ast_log(LOG_ERROR, "XXX Blocking not implemented yet XXX\n");

   res = chan->tech->queryoption(chan, option, data, datalen);
   ast_channel_unlock(chan);

   return res;
}

void ast_channel_queue_connected_line_update	(	struct ast_channel *	chan,
		const struct ast_party_connected_line *	connected,
		const struct ast_set_party_connected_line *	update
	)

Queue a connected line update frame on a channel.

Since:

1.8

Parameters:

	chan	Asterisk channel to indicate connected line information
	connected	Connected line information
	update	What connected line information to update. NULL if all.

Returns:

Nothing

Definition at line 9041 of file channel.c.

References ast_connected_line_build_data(), AST_CONTROL_CONNECTED_LINE, and ast_queue_control_data().

Referenced by ast_do_pickup(), handle_request_invite(), handle_request_update(), handle_response_invite(), local_attended_transfer(), masquerade_colp_transfer(), misdn_queue_connected_line_update(), and sip_call().

{
   unsigned char data[1024];  /* This should be large enough */
   size_t datalen;

   datalen = ast_connected_line_build_data(data, sizeof(data), connected, update);
   if (datalen == (size_t) -1) {
      return;
   }

   ast_queue_control_data(chan, AST_CONTROL_CONNECTED_LINE, data, datalen);
}

void ast_channel_queue_redirecting_update	(	struct ast_channel *	chan,
		const struct ast_party_redirecting *	redirecting,
		const struct ast_set_party_redirecting *	update
	)

Queue a redirecting update frame on a channel.

Since:

1.8

Parameters:

	chan	Asterisk channel to indicate redirecting id information
	redirecting	Redirecting id information
	update	What redirecting information to update. NULL if all.

Returns:

Nothing

Definition at line 9548 of file channel.c.

References AST_CONTROL_REDIRECTING, ast_queue_control_data(), and ast_redirecting_build_data().

Referenced by cb_events(), handle_response_invite(), and misdn_facility_ie_handler().

{
   unsigned char data[1024];  /* This should be large enough */
   size_t datalen;

   datalen = ast_redirecting_build_data(data, sizeof(data), redirecting, update);
   if (datalen == (size_t) -1) {
      return;
   }

   ast_queue_control_data(chan, AST_CONTROL_REDIRECTING, data, datalen);
}

const char* ast_channel_reason2str

(

int

reason

)

return an english explanation of the code returned thru __ast_request_and_dial's 'outstate' argument

Parameters:

reason

The integer argument, usually taken from AST_CONTROL_ macros

Returns:

char pointer explaining the code

Definition at line 5270 of file channel.c.

References AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_HANGUP, AST_CONTROL_RING, and AST_CONTROL_RINGING.

Referenced by attempt_thread().

{
   switch (reason) /* the following appear to be the only ones actually returned by request_and_dial */
   {
   case 0:
      return "Call Failure (not BUSY, and not NO_ANSWER, maybe Circuit busy or down?)";
   case AST_CONTROL_HANGUP:
      return "Hangup";
   case AST_CONTROL_RING:
      return "Local Ring";
   case AST_CONTROL_RINGING:
      return "Remote end Ringing";
   case AST_CONTROL_ANSWER:
      return "Remote end has Answered";
   case AST_CONTROL_BUSY:
      return "Remote end is Busy";
   case AST_CONTROL_CONGESTION:
      return "Congestion (circuits busy)";
   default:
      return "Unknown Reason!!";
   }
}

int ast_channel_redirecting_macro	(	struct ast_channel *	autoservice_chan,
		struct ast_channel *	macro_chan,
		const void *	redirecting_info,
		int	is_caller,
		int	is_frame
	)

Run a redirecting interception macro and update a channel's redirecting information.

Since:

1.8

Whenever we want to update a channel's redirecting information, we may need to run a macro so that an administrator can manipulate the information before sending it out. This function both runs the macro and sends the update to the channel.

Parameters:

	autoservice_chan	Channel to place into autoservice while the macro is running. It is perfectly safe for this to be NULL
	macro_chan	The channel to run the macro on. Also the channel from which we determine which macro we need to run.
	redirecting_info	Either an ast_party_redirecting or ast_frame pointer of type AST_CONTROL_REDIRECTING
	is_caller	If true, then run REDIRECTING_CALLER_SEND_MACRO, otherwise run REDIRECTING_CALLEE_SEND_MACRO
	is_frame	If true, then redirecting_info is an ast_frame pointer, otherwise it is an ast_party_redirecting pointer.

Return values:

	0	Success
	-1	Either the macro does not exist, or there was an error while attempting to run the macro

Todo:

Have multiple return codes based on the MACRO_RESULT

Make constants so that caller and frame can be more expressive than just '1' and '0'

Definition at line 9606 of file channel.c.

References ast_app_run_macro(), ast_channel_lock, ast_channel_unlock, ast_channel_update_redirecting(), ast_party_redirecting_copy(), ast_party_redirecting_free(), ast_party_redirecting_init(), ast_redirecting_parse_data(), ast_strdupa, ast_strlen_zero(), ast_frame::data, ast_frame::datalen, pbx_builtin_getvar_helper(), ast_frame::ptr, ast_channel::redirecting, and S_OR.

Referenced by ast_bridge_call(), ast_generic_bridge(), call_forward_inherit(), do_forward(), feature_request_and_dial(), handle_frame(), local_bridge_loop(), remote_bridge_loop(), and wait_for_answer().

{
   const char *macro;
   const char *macro_args;
   int retval;

   ast_channel_lock(macro_chan);
   macro = pbx_builtin_getvar_helper(macro_chan, is_caller
      ? "REDIRECTING_CALLER_SEND_MACRO" : "REDIRECTING_CALLEE_SEND_MACRO");
   macro = ast_strdupa(S_OR(macro, ""));
   macro_args = pbx_builtin_getvar_helper(macro_chan, is_caller
      ? "REDIRECTING_CALLER_SEND_MACRO_ARGS" : "REDIRECTING_CALLEE_SEND_MACRO_ARGS");
   macro_args = ast_strdupa(S_OR(macro_args, ""));

   if (ast_strlen_zero(macro)) {
      ast_channel_unlock(macro_chan);
      return -1;
   }

   if (is_frame) {
      const struct ast_frame *frame = redirecting_info;

      ast_redirecting_parse_data(frame->data.ptr, frame->datalen, &macro_chan->redirecting);
   } else {
      const struct ast_party_redirecting *redirecting = redirecting_info;

      ast_party_redirecting_copy(&macro_chan->redirecting, redirecting);
   }
   ast_channel_unlock(macro_chan);

   retval = ast_app_run_macro(autoservice_chan, macro_chan, macro, macro_args);
   if (!retval) {
      struct ast_party_redirecting saved_redirecting;

      ast_party_redirecting_init(&saved_redirecting);
      ast_channel_lock(macro_chan);
      ast_party_redirecting_copy(&saved_redirecting, &macro_chan->redirecting);
      ast_channel_unlock(macro_chan);
      ast_channel_update_redirecting(macro_chan, &saved_redirecting, NULL);
      ast_party_redirecting_free(&saved_redirecting);
   }

   return retval;
}

int ast_channel_register

(

const struct ast_channel_tech *

tech

)

Register a channel technology (a new channel driver) Called by a channel module to register the kind of channels it supports.

Parameters:

tech

Structure defining channel technology or "type"

Returns:

Returns 0 on success, -1 on failure.

Definition at line 907 of file channel.c.

References ast_calloc, ast_debug, ast_log(), AST_RWLIST_INSERT_HEAD, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, ast_channel_tech::description, LOG_WARNING, chanlist::tech, and ast_channel_tech::type.

Referenced by load_module(), and unload_module().

{
   struct chanlist *chan;

   AST_RWLIST_WRLOCK(&backends);

   AST_RWLIST_TRAVERSE(&backends, chan, list) {
      if (!strcasecmp(tech->type, chan->tech->type)) {
         ast_log(LOG_WARNING, "Already have a handler for type '%s'\n", tech->type);
         AST_RWLIST_UNLOCK(&backends);
         return -1;
      }
   }
   
   if (!(chan = ast_calloc(1, sizeof(*chan)))) {
      AST_RWLIST_UNLOCK(&backends);
      return -1;
   }
   chan->tech = tech;
   AST_RWLIST_INSERT_HEAD(&backends, chan, list);

   ast_debug(1, "Registered handler for '%s' (%s)\n", chan->tech->type, chan->tech->description);

   ast_verb(2, "Registered channel type '%s' (%s)\n", chan->tech->type, chan->tech->description);

   AST_RWLIST_UNLOCK(&backends);

   return 0;
}

struct ast_channel* ast_channel_release

(

struct ast_channel *

chan

)

[read]

Unlink and release reference to a channel.

This function will unlink the channel from the global channels container if it is still there and also release the current reference to the channel.

Returns:

NULL, convenient for clearing invalid pointers

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Since:

1.8

Definition at line 1921 of file channel.c.

References ao2_unlink, ast_channel_unref, and channels.

Referenced by agent_cleanup(), ast_iax2_new(), ast_request(), bridge_request(), do_notify(), gtalk_newcall(), local_new(), and local_request().

{
   /* Safe, even if already unlinked. */
   ao2_unlink(channels, chan);
   return ast_channel_unref(chan);
}

int ast_channel_sendhtml	(	struct ast_channel *	channel,
		int	subclass,
		const char *	data,
		int	datalen
	)

Sends HTML on given channel Send HTML or URL on link.

Returns:

0 on success or -1 on failure

Definition at line 5864 of file channel.c.

References ast_channel_tech::send_html, and ast_channel::tech.

Referenced by agent_sendhtml(), ast_channel_sendurl(), and wait_for_answer().

{
   if (chan->tech->send_html)
      return chan->tech->send_html(chan, subclass, data, datalen);
   return -1;
}

int ast_channel_sendurl	(	struct ast_channel *	channel,
		const char *	url
	)

Sends a URL on a given link Send URL on link.

Returns:

0 on success or -1 on failure

Definition at line 5871 of file channel.c.

References ast_channel_sendhtml(), and AST_HTML_URL.

Referenced by dial_exec_full(), sendurl_exec(), and try_calling().

{
   return ast_channel_sendhtml(chan, AST_HTML_URL, url, strlen(url) + 1);
}

void ast_channel_set_caller	(	struct ast_channel *	chan,
		const struct ast_party_caller *	caller,
		const struct ast_set_party_caller *	update
	)

Set the caller id information in the Asterisk channel.

Since:

1.8

Parameters:

	chan	Asterisk channel to set caller id information
	caller	Caller id information
	update	What caller information to update. NULL if all.

Returns:

Nothing

Note:

The channel does not need to be locked before calling this function.

Definition at line 7022 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_party_caller_set(), and ast_channel::caller.

{
   if (&chan->caller == caller) {
      /* Don't set to self */
      return;
   }

   ast_channel_lock(chan);
   ast_party_caller_set(&chan->caller, caller, update);
   ast_channel_unlock(chan);
}

void ast_channel_set_caller_event	(	struct ast_channel *	chan,
		const struct ast_party_caller *	caller,
		const struct ast_set_party_caller *	update
	)

Set the caller id information in the Asterisk channel and generate an AMI event if the caller id name or number changed.

Since:

1.8

Parameters:

	chan	Asterisk channel to set caller id information
	caller	Caller id information
	update	What caller information to update. NULL if all.

Returns:

Nothing

Note:

The channel does not need to be locked before calling this function.

Definition at line 7034 of file channel.c.

References ast_cdr_setcid(), ast_channel_lock, ast_channel_unlock, ast_party_caller_set(), ast_channel::caller, ast_channel::cdr, ast_party_caller::id, ast_party_id::name, ast_party_id::number, report_new_callerid(), S_COR, ast_party_name::str, ast_party_number::str, ast_party_name::valid, and ast_party_number::valid.

Referenced by callerid_write(), dial_exec_full(), do_forward(), misdn_update_caller_id(), and ring_entry().

{
   const char *pre_set_number;
   const char *pre_set_name;

   if (&chan->caller == caller) {
      /* Don't set to self */
      return;
   }

   ast_channel_lock(chan);
   pre_set_number =
      S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL);
   pre_set_name = S_COR(chan->caller.id.name.valid, chan->caller.id.name.str, NULL);
   ast_party_caller_set(&chan->caller, caller, update);
   if (S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL)
         != pre_set_number
      || S_COR(chan->caller.id.name.valid, chan->caller.id.name.str, NULL)
         != pre_set_name) {
      /* The caller id name or number changed. */
      report_new_callerid(chan);
   }
   if (chan->cdr) {
      ast_cdr_setcid(chan->cdr, chan);
   }
   ast_channel_unlock(chan);
}

void ast_channel_set_connected_line	(	struct ast_channel *	chan,
		const struct ast_party_connected_line *	connected,
		const struct ast_set_party_connected_line *	update
	)

Set the connected line information in the Asterisk channel.

Since:

1.8

Parameters:

	chan	Asterisk channel to set connected line information
	connected	Connected line information
	update	What connected line information to update. NULL if all.

Returns:

Nothing

Note:

The channel does not need to be locked before calling this function.

Definition at line 8401 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_party_connected_line_set(), and ast_channel::connected.

Referenced by __ast_request_and_dial(), ast_indicate_data(), connectedline_write(), dial_exec_full(), and feature_request_and_dial().

{
   if (&chan->connected == connected) {
      /* Don't set to self */
      return;
   }

   ast_channel_lock(chan);
   ast_party_connected_line_set(&chan->connected, connected, update);
   ast_channel_unlock(chan);
}

void ast_channel_set_fd	(	struct ast_channel *	chan,
		int	which,
		int	fd
	)

Set the file descriptor on the channel

Definition at line 2631 of file channel.c.

References ast_calloc, ast_epoll_data::chan, ast_channel::fds, free, and ast_epoll_data::which.

Referenced by __ast_channel_alloc_ap(), __oh323_new(), __oh323_rtp_create(), __oh323_update_info(), alsa_new(), ast_deactivate_generator(), ast_do_masquerade(), dahdi_new(), gtalk_new(), initialize_udptl(), internal_deactivate_generator(), jingle_new(), mgcp_new(), misdn_new(), my_swap_subchannels(), nbs_new(), oss_new(), phone_new(), process_sdp(), setformat(), sip_new(), sip_set_rtp_peer(), skinny_new(), start_rtp(), and swap_subs().

{
#ifdef HAVE_EPOLL
   struct epoll_event ev;
   struct ast_epoll_data *aed = NULL;

   if (chan->fds[which] > -1) {
      epoll_ctl(chan->epfd, EPOLL_CTL_DEL, chan->fds[which], &ev);
      aed = chan->epfd_data[which];
   }

   /* If this new fd is valid, add it to the epoll */
   if (fd > -1) {
      if (!aed && (!(aed = ast_calloc(1, sizeof(*aed)))))
         return;
      
      chan->epfd_data[which] = aed;
      aed->chan = chan;
      aed->which = which;
      
      ev.events = EPOLLIN | EPOLLPRI | EPOLLERR | EPOLLHUP;
      ev.data.ptr = aed;
      epoll_ctl(chan->epfd, EPOLL_CTL_ADD, fd, &ev);
   } else if (aed) {
      /* We don't have to keep around this epoll data structure now */
      free(aed);
      chan->epfd_data[which] = NULL;
   }
#endif
   chan->fds[which] = fd;
   return;
}

void ast_channel_set_linkgroup	(	struct ast_channel *	chan,
		struct ast_channel *	peer
	)

propagate the linked id between chan and peer

Definition at line 6344 of file channel.c.

References ast_channel::_bridge, ast_bridged_channel(), ast_channel_change_linkedid(), ast_strdupa, and oldest_linkedid().

Referenced by ast_bridge_call(), and ast_do_masquerade().

{
   const char* linkedid=NULL;
   struct ast_channel *bridged;

   linkedid = oldest_linkedid(chan->linkedid, peer->linkedid);
   linkedid = oldest_linkedid(linkedid, chan->uniqueid);
   linkedid = oldest_linkedid(linkedid, peer->uniqueid);
   if (chan->_bridge) {
      bridged = ast_bridged_channel(chan);
      if (bridged && bridged != peer) {
         linkedid = oldest_linkedid(linkedid, bridged->linkedid);
         linkedid = oldest_linkedid(linkedid, bridged->uniqueid);
      }
   }
   if (peer->_bridge) {
      bridged = ast_bridged_channel(peer);
      if (bridged && bridged != chan) {
         linkedid = oldest_linkedid(linkedid, bridged->linkedid);
         linkedid = oldest_linkedid(linkedid, bridged->uniqueid);
      }
   }

   /* just in case setting a stringfield to itself causes problems */
   linkedid = ast_strdupa(linkedid);

   ast_channel_change_linkedid(chan, linkedid);
   ast_channel_change_linkedid(peer, linkedid);
   if (chan->_bridge) {
      bridged = ast_bridged_channel(chan);
      if (bridged && bridged != peer) {
         ast_channel_change_linkedid(bridged, linkedid);
      }
   }
   if (peer->_bridge) {
      bridged = ast_bridged_channel(peer);
      if (bridged && bridged != chan) {
         ast_channel_change_linkedid(bridged, linkedid);
      }
   }
}

void ast_channel_set_redirecting	(	struct ast_channel *	chan,
		const struct ast_party_redirecting *	redirecting,
		const struct ast_set_party_redirecting *	update
	)

Set the redirecting id information in the Asterisk channel.

Since:

1.8

Parameters:

	chan	Asterisk channel to set redirecting id information
	redirecting	Redirecting id information
	update	What redirecting information to update. NULL if all.

Returns:

Nothing

Note:

The channel does not need to be locked before calling this function.

Definition at line 9054 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_party_redirecting_set(), and ast_channel::redirecting.

Referenced by ast_indicate_data(), handle_request_invite(), handle_response(), misdn_copy_redirecting_to_ast(), and redirecting_write().

{
   if (&chan->redirecting == redirecting) {
      /* Don't set to self */
      return;
   }

   ast_channel_lock(chan);
   ast_party_redirecting_set(&chan->redirecting, redirecting, update);
   ast_channel_unlock(chan);
}

int ast_channel_setoption	(	struct ast_channel *	channel,
		int	option,
		void *	data,
		int	datalen,
		int	block
	)

Sets an option on a channel.

Parameters:

	channel	channel to set options on
	option	option to change
	data	data specific to option
	datalen	length of the data
	block	blocking or not

Set an option on a channel (see frame.h), optionally blocking awaiting the reply

Returns:

0 on success and -1 on failure

Definition at line 7733 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_log(), errno, LOG_ERROR, ast_channel_tech::setoption, and ast_channel::tech.

Referenced by analog_hangup(), ast_bridge_call(), ast_channel_make_compatible_helper(), common_exec(), conf_run(), dahdi_hangup(), dial_exec_full(), func_channel_write(), func_channel_write_real(), handle_tddmode(), play_record_review(), rcvfax_exec(), reset_volumes(), set_format(), set_listen_volume(), set_security_requirements(), set_talk_volume(), sndfax_exec(), try_calling(), and vm_forwardoptions().

{
   int res;

   ast_channel_lock(chan);
   if (!chan->tech->setoption) {
      errno = ENOSYS;
      ast_channel_unlock(chan);
      return -1;
   }

   if (block)
      ast_log(LOG_ERROR, "XXX Blocking not implemented yet XXX\n");

   res = chan->tech->setoption(chan, option, data, datalen);
   ast_channel_unlock(chan);

   return res;
}

void ast_channel_setwhentohangup	(	struct ast_channel *	chan,
		time_t	offset
	)

Set when to hang a channel up.

Parameters:

	chan	channel on which to check for hang up
	offset	offset in seconds relative to the current time of when to hang up

This function sets the absolute time out on a channel (when to hang up).

Note:

This function does not require that the channel is locked before calling it.

Returns:

Nothing

See also:

ast_channel_setwhentohangup_tv()

Version:

1.6.1 deprecated function (only had seconds precision)

Definition at line 878 of file channel.c.

References ast_channel_setwhentohangup_tv().

{
   struct timeval when = { offset, };
   ast_channel_setwhentohangup_tv(chan, when);
}

void ast_channel_setwhentohangup_tv	(	struct ast_channel *	chan,
		struct timeval	offset
	)

Set when to hang a channel up.

Parameters:

	chan	channel on which to check for hang up
	offset	offset in seconds and useconds relative to the current time of when to hang up

This function sets the absolute time out on a channel (when to hang up).

Note:

This function does not require that the channel is locked before calling it.

Returns:

Nothing

Since:

1.6.1

Definition at line 871 of file channel.c.

References ast_null_frame, ast_queue_frame(), ast_tvadd(), ast_tvnow(), ast_tvzero(), and ast_channel::whentohangup.

Referenced by action_timeout(), ast_channel_setwhentohangup(), handle_autohangup(), and timeout_write().

{
   chan->whentohangup = ast_tvzero(offset) ? offset : ast_tvadd(offset, ast_tvnow());
   ast_queue_frame(chan, &ast_null_frame);
   return;
}

struct ast_silence_generator* ast_channel_start_silence_generator

(

struct ast_channel *

chan

)

[read]

Starts a silence generator on the given channel.

Parameters:

chan

The channel to generate silence on

Returns:

An ast_silence_generator pointer, or NULL if an error occurs

This function will cause SLINEAR silence to be generated on the supplied channel until it is disabled; if the channel cannot be put into SLINEAR mode then the function will fail.

Note:

The pointer returned by this function must be preserved and passed to ast_channel_stop_silence_generator when you wish to stop the silence generation.

Definition at line 8247 of file channel.c.

References ast_activate_generator(), ast_calloc, ast_debug, AST_FORMAT_SLINEAR, ast_free, ast_log(), ast_set_write_format(), LOG_ERROR, ast_silence_generator::old_write_format, and ast_channel::writeformat.

Referenced by __ast_play_and_record(), ast_bridge_call(), ast_dtmf_stream(), ast_readstring_full(), ast_safe_sleep_conditional(), channel_spy(), record_exec(), TransferCallStep1(), waitfor_exec(), and waitforring_exec().

{
   struct ast_silence_generator *state;

   if (!(state = ast_calloc(1, sizeof(*state)))) {
      return NULL;
   }

   state->old_write_format = chan->writeformat;

   if (ast_set_write_format(chan, AST_FORMAT_SLINEAR) < 0) {
      ast_log(LOG_ERROR, "Could not set write format to SLINEAR\n");
      ast_free(state);
      return NULL;
   }

   ast_activate_generator(chan, &silence_generator, state);

   ast_debug(1, "Started silence generator on '%s'\n", chan->name);

   return state;
}

void ast_channel_stop_silence_generator	(	struct ast_channel *	chan,
		struct ast_silence_generator *	state
	)

Stops a previously-started silence generator on the given channel.

Parameters:

	chan	The channel to operate on
	state	The ast_silence_generator pointer return by a previous call to ast_channel_start_silence_generator.

Returns:

nothing

This function will stop the operating silence generator and return the channel to its previous write format.

Definition at line 8299 of file channel.c.

References ast_debug, ast_free, ast_log(), ast_set_write_format(), internal_deactivate_generator(), LOG_ERROR, and ast_silence_generator::old_write_format.

Referenced by __ast_play_and_record(), ast_bridge_call(), ast_dtmf_stream(), ast_readstring_full(), ast_safe_sleep_conditional(), channel_spy(), HandleCallOutgoing(), key_dial_page(), record_exec(), unistim_hangup(), waitfor_exec(), and waitforring_exec().

{
   if (!state)
      return;

   if (internal_deactivate_generator(chan, &silence_generator)) {
      ast_debug(1, "Stopped silence generator on '%s'\n", chan->name);

      if (ast_set_write_format(chan, state->old_write_format) < 0)
         ast_log(LOG_ERROR, "Could not return write format to its original state\n");
   }
   ast_free(state);
}

int ast_channel_supports_html

(

struct ast_channel *

channel

)

Checks for HTML support on a channel.

Returns:

0 if channel does not support HTML or non-zero if it does

Definition at line 5859 of file channel.c.

References ast_channel_tech::send_html, and ast_channel::tech.

Referenced by dial_exec_full(), sendurl_exec(), and try_calling().

{
   return (chan->tech->send_html) ? 1 : 0;
}

int ast_channel_transfer_masquerade	(	struct ast_channel *	target_chan,
		const struct ast_party_connected_line *	target_id,
		int	target_held,
		struct ast_channel *	transferee_chan,
		const struct ast_party_connected_line *	transferee_id,
		int	transferee_held
	)

Setup a masquerade to transfer a call.

Since:

1.8

Parameters:

	target_chan	Target of the call transfer. (Masquerade original channel)
	target_id	New connected line information for the target channel.
	target_held	TRUE if the target call is on hold.
	transferee_chan	Transferee of the call transfer. (Masquerade clone channel)
	transferee_id	New connected line information for the transferee channel.
	transferee_held	TRUE if the transferee call is on hold.

Party A - Transferee Party B - Transferer Party C - Target of transfer

Party B transfers A to C.

Party A is connected to bridged channel B1. Party B is connected to channels C1 and C2. Party C is connected to bridged channel B2.

Party B -- C1 == B1 -- Party A __/ / Party B -- C2 == B2 -- Party C

Bridged channel B1 is masqueraded into channel C2. Where B1 is the masquerade clone channel and C2 is the masquerade original channel.

See also:

ast_channel_masquerade()

Note:

Has the same locking requirements as ast_channel_masquerade().

Return values:

	0	on success.
	-1	on error.

Definition at line 6141 of file channel.c.

References __ast_channel_masquerade(), ast_calloc, ast_datastore_alloc, ast_datastore_free(), ast_datastore::data, party_connected_line_copy_transfer(), xfer_masquerade_ds::target_held, xfer_masquerade_ds::target_id, xfer_masquerade_ds::transferee_held, and xfer_masquerade_ds::transferee_id.

Referenced by analog_attempt_transfer(), and misdn_attempt_transfer().

{
   struct ast_datastore *xfer_ds;
   struct xfer_masquerade_ds *xfer_colp;
   int res;

   xfer_ds = ast_datastore_alloc(&xfer_ds_info, NULL);
   if (!xfer_ds) {
      return -1;
   }

   xfer_colp = ast_calloc(1, sizeof(*xfer_colp));
   if (!xfer_colp) {
      ast_datastore_free(xfer_ds);
      return -1;
   }
   party_connected_line_copy_transfer(&xfer_colp->target_id, target_id);
   xfer_colp->target_held = target_held;
   party_connected_line_copy_transfer(&xfer_colp->transferee_id, transferee_id);
   xfer_colp->transferee_held = transferee_held;
   xfer_ds->data = xfer_colp;

   res = __ast_channel_masquerade(target_chan, transferee_chan, xfer_ds);
   if (res) {
      ast_datastore_free(xfer_ds);
   }
   return res;
}

void ast_channel_undefer_dtmf

(

struct ast_channel *

chan

)

Unset defer DTMF flag on channel.

Undo defer. ast_read will return any DTMF characters that were queued

Definition at line 1628 of file channel.c.

References ast_clear_flag, and AST_FLAG_DEFER_DTMF.

Referenced by __adsi_transmit_messages(), and find_cache().

{
   if (chan)
      ast_clear_flag(chan, AST_FLAG_DEFER_DTMF);
}

void ast_channel_unregister

(

const struct ast_channel_tech *

tech

)

Unregister a channel technology.

Parameters:

tech

Structure defining channel technology or "type" that was previously registered

Returns:

No return value.

Definition at line 938 of file channel.c.

References ast_debug, ast_free, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_END, AST_RWLIST_TRAVERSE_SAFE_BEGIN, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, chanlist::tech, and ast_channel_tech::type.

Referenced by __unload_module(), load_module(), and unload_module().

{
   struct chanlist *chan;

   ast_debug(1, "Unregistering channel type '%s'\n", tech->type);

   AST_RWLIST_WRLOCK(&backends);

   AST_RWLIST_TRAVERSE_SAFE_BEGIN(&backends, chan, list) {
      if (chan->tech == tech) {
         AST_LIST_REMOVE_CURRENT(list);
         ast_free(chan);
         ast_verb(2, "Unregistered channel type '%s'\n", tech->type);
         break;   
      }
   }
   AST_LIST_TRAVERSE_SAFE_END;

   AST_RWLIST_UNLOCK(&backends);
}

void ast_channel_update_connected_line	(	struct ast_channel *	chan,
		const struct ast_party_connected_line *	connected,
		const struct ast_set_party_connected_line *	update
	)

Indicate that the connected line information has changed.

Since:

1.8

Parameters:

	chan	Asterisk channel to indicate connected line information
	connected	Connected line information
	update	What connected line information to update. NULL if all.

Returns:

Nothing

Definition at line 9028 of file channel.c.

References ast_connected_line_build_data(), AST_CONTROL_CONNECTED_LINE, and ast_indicate_data().

Referenced by app_exec(), ast_channel_connected_line_macro(), ast_do_pickup(), atxfer_fail_cleanup(), builtin_atxfer(), connectedline_write(), parked_call_exec(), and wait_for_answer().

{
   unsigned char data[1024];  /* This should be large enough */
   size_t datalen;

   datalen = ast_connected_line_build_data(data, sizeof(data), connected, update);
   if (datalen == (size_t) -1) {
      return;
   }

   ast_indicate_data(chan, AST_CONTROL_CONNECTED_LINE, data, datalen);
}

void ast_channel_update_redirecting	(	struct ast_channel *	chan,
		const struct ast_party_redirecting *	redirecting,
		const struct ast_set_party_redirecting *	update
	)

Indicate that the redirecting id has changed.

Since:

1.8

Parameters:

	chan	Asterisk channel to indicate redirecting id information
	redirecting	Redirecting id information
	update	What redirecting information to update. NULL if all.

Returns:

Nothing

Definition at line 9535 of file channel.c.

References AST_CONTROL_REDIRECTING, ast_indicate_data(), and ast_redirecting_build_data().

Referenced by ast_channel_redirecting_macro(), call_forward_inherit(), do_forward(), redirecting_write(), and wait_for_answer().

{
   unsigned char data[1024];  /* This should be large enough */
   size_t datalen;

   datalen = ast_redirecting_build_data(data, sizeof(data), redirecting, update);
   if (datalen == (size_t) -1) {
      return;
   }

   ast_indicate_data(chan, AST_CONTROL_REDIRECTING, data, datalen);
}

struct ast_variable* ast_channeltype_list

(

void

)

[read]

return an ast_variable list of channeltypes

Definition at line 261 of file channel.c.

References AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_variable_new(), ast_channel_tech::description, chanlist::tech, ast_channel_tech::type, and var.

Referenced by ast_var_channel_types(), and ast_var_channel_types_table().

{
   struct chanlist *cl;
   struct ast_variable *var = NULL, *prev = NULL;

   AST_RWLIST_RDLOCK(&backends);
   AST_RWLIST_TRAVERSE(&backends, cl, list) {
      if (prev)  {
         if ((prev->next = ast_variable_new(cl->tech->type, cl->tech->description, "")))
            prev = prev->next;
      } else {
         var = ast_variable_new(cl->tech->type, cl->tech->description, "");
         prev = var;
      }
   }
   AST_RWLIST_UNLOCK(&backends);

   return var;
}

int ast_check_hangup

(

struct ast_channel *

chan

)

Check to see if a channel is needing hang up.

Parameters:

chan

channel on which to check for hang up This function determines if the channel is being requested to be hung up.

Returns:

Returns 0 if not, or 1 if hang up is requested (including time-out).

Definition at line 806 of file channel.c.

References ast_channel::_softhangup, ast_debug, AST_SOFTHANGUP_TIMEOUT, ast_test_suite_event_notify, ast_tvdiff_ms(), ast_tvnow(), ast_tvzero(), and ast_channel::whentohangup.

Referenced by __ast_pbx_run(), __ast_read(), _macro_exec(), agent_indicate(), agi_exec(), agi_handle_command(), announce_thread(), ast_bridge_call(), ast_call(), ast_channel_bridge(), ast_check_hangup_locked(), ast_indicate_data(), ast_raw_answer(), ast_readstring_full(), ast_recvtext(), ast_rtp_instance_bridge(), ast_sendtext(), ast_transfer(), ast_udptl_bridge(), ast_waitfordigit_full(), ast_write(), autoservice_run(), bridge_call_thread(), bridge_exec(), builtin_atxfer(), call_forward_inherit(), channel_spy(), check_bridge(), common_exec(), conf_play(), conf_run(), dahdi_sendtext(), dahdi_setoption(), dial_exec_full(), dundi_lookup_internal(), eagi_exec(), eivr_comm(), feature_request_and_dial(), findmeexec(), func_channel_read(), handle_sendimage(), iax2_bridge(), launch_asyncagi(), local_bridge_loop(), local_fixup(), login_exec(), lua_check_hangup(), ospfinished_exec(), pbx_builtin_incomplete(), pbx_builtin_waitexten(), pbx_exec(), read_exec(), readexten_exec(), remote_bridge_loop(), run_agi(), run_ras(), try_calling(), and wait_for_answer().

{
   if (chan->_softhangup)     /* yes if soft hangup flag set */
      return 1;
   if (ast_tvzero(chan->whentohangup)) /* no if no hangup scheduled */
      return 0;
   if (ast_tvdiff_ms(chan->whentohangup, ast_tvnow()) > 0)  /* no if hangup time has not come yet. */
      return 0;
   ast_debug(4, "Hangup time has come: %" PRIi64 "\n", ast_tvdiff_ms(chan->whentohangup, ast_tvnow()));
   ast_test_suite_event_notify("HANGUP_TIME", "Channel: %s", chan->name);
   chan->_softhangup |= AST_SOFTHANGUP_TIMEOUT; /* record event */
   return 1;
}

int ast_check_hangup_locked

(

struct ast_channel *

chan

)

Definition at line 820 of file channel.c.

References ast_channel_lock, ast_channel_unlock, and ast_check_hangup().

Referenced by action_redirect(), and ast_channel_bridge().

{
   int res;
   ast_channel_lock(chan);
   res = ast_check_hangup(chan);
   ast_channel_unlock(chan);
   return res;
}

int ast_connected_line_build_data	(	unsigned char *	data,
		size_t	datalen,
		const struct ast_party_connected_line *	connected,
		const struct ast_set_party_connected_line *	update
	)

Build the connected line information data frame.

Since:

1.8

Parameters:

	data	Buffer to fill with the frame data
	datalen	Size of the buffer to fill
	connected	Connected line information
	update	What connected line information to build. NULL if all.

Return values:

	-1	if error
	Amount	of data buffer used

Definition at line 8768 of file channel.c.

References AST_CONNECTED_LINE_ID_PRESENTATION, AST_CONNECTED_LINE_NAME, AST_CONNECTED_LINE_NAME_CHAR_SET, AST_CONNECTED_LINE_NAME_PRESENTATION, AST_CONNECTED_LINE_NAME_VALID, AST_CONNECTED_LINE_NUMBER, AST_CONNECTED_LINE_NUMBER_PLAN, AST_CONNECTED_LINE_NUMBER_PRESENTATION, AST_CONNECTED_LINE_NUMBER_VALID, AST_CONNECTED_LINE_SOURCE, AST_CONNECTED_LINE_SUBADDRESS, AST_CONNECTED_LINE_SUBADDRESS_ODD_EVEN, AST_CONNECTED_LINE_SUBADDRESS_TYPE, AST_CONNECTED_LINE_SUBADDRESS_VALID, AST_CONNECTED_LINE_TAG, AST_CONNECTED_LINE_VERSION, ast_log(), ast_set_party_connected_line::id, ast_party_connected_line::id, LOG_WARNING, ast_party_id_ies::name, party_id_build_data(), ast_party_connected_line::source, ast_party_name_ies::str, and value.

Referenced by ast_channel_queue_connected_line_update(), ast_channel_update_connected_line(), local_attended_transfer(), local_indicate(), and masquerade_colp_transfer().

{
   int32_t value;
   size_t pos = 0;
   int res;

   static const struct ast_party_id_ies ies = {
      .name.str = AST_CONNECTED_LINE_NAME,
      .name.char_set = AST_CONNECTED_LINE_NAME_CHAR_SET,
      .name.presentation = AST_CONNECTED_LINE_NAME_PRESENTATION,
      .name.valid = AST_CONNECTED_LINE_NAME_VALID,

      .number.str = AST_CONNECTED_LINE_NUMBER,
      .number.plan = AST_CONNECTED_LINE_NUMBER_PLAN,
      .number.presentation = AST_CONNECTED_LINE_NUMBER_PRESENTATION,
      .number.valid = AST_CONNECTED_LINE_NUMBER_VALID,

      .subaddress.str = AST_CONNECTED_LINE_SUBADDRESS,
      .subaddress.type = AST_CONNECTED_LINE_SUBADDRESS_TYPE,
      .subaddress.odd_even_indicator = AST_CONNECTED_LINE_SUBADDRESS_ODD_EVEN,
      .subaddress.valid = AST_CONNECTED_LINE_SUBADDRESS_VALID,

      .tag = AST_CONNECTED_LINE_TAG,
      .combined_presentation = AST_CONNECTED_LINE_ID_PRESENTATION,
   };

   /*
    * The size of integer values must be fixed in case the frame is
    * shipped to another machine.
    */

   /* Connected line frame version */
   if (datalen < pos + (sizeof(data[0]) * 2) + 1) {
      ast_log(LOG_WARNING, "No space left for connected line frame version\n");
      return -1;
   }
   data[pos++] = AST_CONNECTED_LINE_VERSION;
   data[pos++] = 1;
   data[pos++] = 2;/* Version 1 did not have a version ie */

   res = party_id_build_data(data + pos, datalen - pos, &connected->id,
      "connected line", &ies, update ? &update->id : NULL);
   if (res < 0) {
      return -1;
   }
   pos += res;

   /* Connected line source */
   if (datalen < pos + (sizeof(data[0]) * 2) + sizeof(value)) {
      ast_log(LOG_WARNING, "No space left for connected line source\n");
      return -1;
   }
   data[pos++] = AST_CONNECTED_LINE_SOURCE;
   data[pos++] = sizeof(value);
   value = htonl(connected->source);
   memcpy(data + pos, &value, sizeof(value));
   pos += sizeof(value);

   return pos;
}

void ast_connected_line_copy_from_caller	(	struct ast_party_connected_line *	dest,
		const struct ast_party_caller *	src
	)

Copy the caller information to the connected line information.

Since:

1.8

Parameters:

	dest	Destination connected line information
	src	Source caller information

Returns:

Nothing

Note:

Assumes locks are already acquired

Definition at line 8386 of file channel.c.

References ast_party_caller::ani, ast_party_connected_line::ani, ast_party_caller::ani2, ast_party_connected_line::ani2, ast_party_id_copy(), ast_party_caller::id, and ast_party_connected_line::id.

Referenced by app_exec(), ast_do_pickup(), begin_dial_channel(), builtin_atxfer(), dial_exec_full(), dial_transfer(), do_forward(), feature_request_and_dial(), findmeexec(), local_call(), parked_call_exec(), ring_entry(), and wait_for_answer().

{
   ast_party_id_copy(&dest->id, &src->id);
   ast_party_id_copy(&dest->ani, &src->ani);
   dest->ani2 = src->ani2;
}

void ast_connected_line_copy_to_caller	(	struct ast_party_caller *	dest,
		const struct ast_party_connected_line *	src
	)

Copy the connected line information to the caller information.

Since:

1.8

Parameters:

	dest	Destination caller information
	src	Source connected line information

Returns:

Nothing

Note:

Assumes locks are already acquired

Definition at line 8393 of file channel.c.

References ast_party_connected_line::ani, ast_party_caller::ani, ast_party_connected_line::ani2, ast_party_caller::ani2, ast_party_id_copy(), ast_party_connected_line::id, and ast_party_caller::id.

Referenced by local_call(), and local_indicate().

{
   ast_party_id_copy(&dest->id, &src->id);
   ast_party_id_copy(&dest->ani, &src->ani);

   dest->ani2 = src->ani2;
}

int ast_connected_line_parse_data	(	const unsigned char *	data,
		size_t	datalen,
		struct ast_party_connected_line *	connected
	)

Parse connected line indication frame data.

Since:

1.8

Parameters:

	data	Buffer with the frame data to parse
	datalen	Size of the buffer
	connected	Extracted connected line information

Return values:

	0	on success.
	-1	on error.

Note:

The filled in connected line structure needs to be initialized by ast_party_connected_line_set_init() before calling. If defaults are not required use ast_party_connected_line_init().

The filled in connected line structure needs to be destroyed by ast_party_connected_line_free() when it is no longer needed.

Definition at line 8829 of file channel.c.

References AST_CONNECTED_LINE_ID_PRESENTATION, AST_CONNECTED_LINE_NAME, AST_CONNECTED_LINE_NAME_CHAR_SET, AST_CONNECTED_LINE_NAME_PRESENTATION, AST_CONNECTED_LINE_NAME_VALID, AST_CONNECTED_LINE_NUMBER, AST_CONNECTED_LINE_NUMBER_PLAN, AST_CONNECTED_LINE_NUMBER_PRESENTATION, AST_CONNECTED_LINE_NUMBER_VALID, AST_CONNECTED_LINE_SOURCE, AST_CONNECTED_LINE_SUBADDRESS, AST_CONNECTED_LINE_SUBADDRESS_ODD_EVEN, AST_CONNECTED_LINE_SUBADDRESS_TYPE, AST_CONNECTED_LINE_SUBADDRESS_VALID, AST_CONNECTED_LINE_TAG, AST_CONNECTED_LINE_VERSION, ast_free, ast_log(), ast_malloc, AST_PARTY_CHAR_SET_ISO8859_1, ast_party_name::char_set, ast_party_id_ies::combined_presentation, ast_party_connected_line::id, LOG_DEBUG, LOG_WARNING, ast_party_id::name, ast_party_id::number, ast_party_subaddress::odd_even_indicator, ast_party_number::plan, ast_party_number::presentation, ast_party_name::presentation, ast_party_connected_line::source, ast_party_subaddress::str, ast_party_number::str, ast_party_name::str, ast_party_id::subaddress, ast_party_id::tag, ast_party_subaddress::type, ast_party_subaddress::valid, ast_party_number::valid, ast_party_name::valid, and value.

Referenced by __ast_read(), ast_channel_connected_line_macro(), ast_indicate_data(), feature_request_and_dial(), socket_process(), wait_for_answer(), and wait_for_winner().

{
   size_t pos;
   unsigned char ie_len;
   unsigned char ie_id;
   int32_t value;
   int frame_version = 1;
   int combined_presentation = 0;
   int got_combined_presentation = 0;/* TRUE if got a combined name and number presentation value. */

   for (pos = 0; pos < datalen; pos += ie_len) {
      if (datalen < pos + sizeof(ie_id) + sizeof(ie_len)) {
         ast_log(LOG_WARNING, "Invalid connected line update\n");
         return -1;
      }
      ie_id = data[pos++];
      ie_len = data[pos++];
      if (datalen < pos + ie_len) {
         ast_log(LOG_WARNING, "Invalid connected line update\n");
         return -1;
      }

      switch (ie_id) {
/* Connected line party frame version */
      case AST_CONNECTED_LINE_VERSION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line frame version (%u)\n",
               (unsigned) ie_len);
            break;
         }
         frame_version = data[pos];
         break;
/* Connected line party id name */
      case AST_CONNECTED_LINE_NAME:
         ast_free(connected->id.name.str);
         connected->id.name.str = ast_malloc(ie_len + 1);
         if (connected->id.name.str) {
            memcpy(connected->id.name.str, data + pos, ie_len);
            connected->id.name.str[ie_len] = 0;
         }
         break;
      case AST_CONNECTED_LINE_NAME_CHAR_SET:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line name char set (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.name.char_set = data[pos];
         break;
      case AST_CONNECTED_LINE_NAME_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line name presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.name.presentation = data[pos];
         break;
      case AST_CONNECTED_LINE_NAME_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line name valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.name.valid = data[pos];
         break;
/* Connected line party id number */
      case AST_CONNECTED_LINE_NUMBER:
         ast_free(connected->id.number.str);
         connected->id.number.str = ast_malloc(ie_len + 1);
         if (connected->id.number.str) {
            memcpy(connected->id.number.str, data + pos, ie_len);
            connected->id.number.str[ie_len] = 0;
         }
         break;
      case AST_CONNECTED_LINE_NUMBER_PLAN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line numbering plan (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.number.plan = data[pos];
         break;
      case AST_CONNECTED_LINE_NUMBER_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line number presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.number.presentation = data[pos];
         break;
      case AST_CONNECTED_LINE_NUMBER_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line number valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.number.valid = data[pos];
         break;
/* Connected line party id combined presentation */
      case AST_CONNECTED_LINE_ID_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line combined presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         combined_presentation = data[pos];
         got_combined_presentation = 1;
         break;
/* Connected line party id subaddress */
      case AST_CONNECTED_LINE_SUBADDRESS:
         ast_free(connected->id.subaddress.str);
         connected->id.subaddress.str = ast_malloc(ie_len + 1);
         if (connected->id.subaddress.str) {
            memcpy(connected->id.subaddress.str, data + pos, ie_len);
            connected->id.subaddress.str[ie_len] = 0;
         }
         break;
      case AST_CONNECTED_LINE_SUBADDRESS_TYPE:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line type of subaddress (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.subaddress.type = data[pos];
         break;
      case AST_CONNECTED_LINE_SUBADDRESS_ODD_EVEN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING,
               "Invalid connected line subaddress odd-even indicator (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.subaddress.odd_even_indicator = data[pos];
         break;
      case AST_CONNECTED_LINE_SUBADDRESS_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid connected line subaddress valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         connected->id.subaddress.valid = data[pos];
         break;
/* Connected line party tag */
      case AST_CONNECTED_LINE_TAG:
         ast_free(connected->id.tag);
         connected->id.tag = ast_malloc(ie_len + 1);
         if (connected->id.tag) {
            memcpy(connected->id.tag, data + pos, ie_len);
            connected->id.tag[ie_len] = 0;
         }
         break;
/* Connected line party source */
      case AST_CONNECTED_LINE_SOURCE:
         if (ie_len != sizeof(value)) {
            ast_log(LOG_WARNING, "Invalid connected line source (%u)\n",
               (unsigned) ie_len);
            break;
         }
         memcpy(&value, data + pos, sizeof(value));
         connected->source = ntohl(value);
         break;
/* Connected line party unknown element */
      default:
         ast_log(LOG_DEBUG, "Unknown connected line element: %u (%u)\n",
            (unsigned) ie_id, (unsigned) ie_len);
         break;
      }
   }

   switch (frame_version) {
   case 1:
      /*
       * The other end is an earlier version that we need to adjust
       * for compatibility.
       */
      connected->id.name.valid = 1;
      connected->id.name.char_set = AST_PARTY_CHAR_SET_ISO8859_1;
      connected->id.number.valid = 1;
      if (got_combined_presentation) {
         connected->id.name.presentation = combined_presentation;
         connected->id.number.presentation = combined_presentation;
      }
      break;
   case 2:
      /* The other end is at the same level as we are. */
      break;
   default:
      /*
       * The other end is newer than we are.
       * We need to assume that they are compatible with us.
       */
      ast_log(LOG_DEBUG, "Connected line frame has newer version: %u\n",
         (unsigned) frame_version);
      break;
   }

   return 0;
}

void ast_deactivate_generator

(

struct ast_channel *

chan

)

Deactivate an active generator

Definition at line 3091 of file channel.c.

References ast_channel_lock, ast_channel_set_fd(), ast_channel_unlock, ast_clear_flag, AST_FLAG_WRITE_INT, AST_GENERATOR_FD, ast_settimeout(), ast_channel::generator, ast_channel::generatordata, and ast_generator::release.

Referenced by __ast_read(), app_exec(), ast_openstream_full(), ast_playtones_stop(), ast_quiet_chan(), ast_read_generator_actions(), ast_tonepair_stop(), ast_write(), cb_events(), channel_spy(), dial_exec_full(), generator_force(), local_ast_moh_stop(), old_milliwatt_exec(), transmit_audio(), and wait_for_answer().

{
   ast_channel_lock(chan);
   if (chan->generatordata) {
      if (chan->generator && chan->generator->release)
         chan->generator->release(chan, chan->generatordata);
      chan->generatordata = NULL;
      chan->generator = NULL;
      ast_channel_set_fd(chan, AST_GENERATOR_FD, -1);
      ast_clear_flag(chan, AST_FLAG_WRITE_INT);
      ast_settimeout(chan, 0, NULL, NULL);
   }
   ast_channel_unlock(chan);
}

int ast_do_masquerade

(

struct ast_channel *

original

)

Start masquerading a channel.

Note:

absolutely _NO_ channel locks should be held before calling this function.

XXX This is a seriously whacked out operation. We're essentially putting the guts of the clone channel into the original channel. Start by killing off the original channel's backend. I'm not sure we're going to keep this function, because while the features are nice, the cost is very high in terms of pure nastiness. XXX

Parameters:

chan

Channel to masquerade

Start masquerading a channel.

Note:

Assumes _NO_ channels and _NO_ channel pvt's are locked. If a channel is locked while calling this function, it invalidates our channel container locking order. All channels must be unlocked before it is permissible to lock the channels' ao2 container.

< TRUE if the clonechan was a zombie before the masquerade.

Definition at line 6503 of file channel.c.

References __ast_change_name_nolink(), ast_channel::_bridge, ast_channel::_softhangup, ast_channel::_state, accountcode, ast_channel::adsicpe, ast_channel::alertpipe, ao2_link, ao2_lock, ao2_unlink, ao2_unlock, ast_app_group_update(), ast_autochan_new_channel(), ast_bridge_end_dtmf(), ast_bridged_channel(), ast_cause2str(), AST_CEL_BRIDGE_UPDATE, ast_cel_report_event(), ast_channel_datastore_find(), ast_channel_datastore_remove(), ast_channel_lock, ast_channel_lock_both, AST_CHANNEL_NAME, ast_channel_ref, ast_channel_set_fd(), ast_channel_set_linkgroup(), ast_channel_unlock, ast_channel_unref, ast_clear_flag, AST_CONTROL_SRCCHANGE, AST_CONTROL_UNHOLD, ast_copy_string(), ast_datastore_free(), ast_debug, AST_FLAG_BLOCKING, AST_FLAG_DISABLE_DEVSTATE_CACHE, AST_FLAG_EXCEPTION, AST_FLAG_OUTGOING, AST_FLAG_ZOMBIE, AST_GENERATOR_FD, ast_getformatname(), ast_indicate(), ast_kill_tech, AST_LIST_APPEND_LIST, AST_LIST_FIRST, AST_LIST_HEAD_INIT_NOLOCK, AST_LIST_HEAD_NOLOCK, AST_LIST_INSERT_TAIL, AST_LIST_REMOVE_HEAD, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_log(), ast_manager_event, ast_manager_event_multichan, AST_MAX_FDS, ast_null_frame, ast_queue_frame(), ast_set_flag, ast_set_read_format(), ast_set_write_format(), AST_SOFTHANGUP_DEV, ast_state2str(), ast_string_field_set, ast_test_flag, AST_TIMING_FD, ast_channel::blocker, ast_channel::caller, ast_channel::cdr, ast_datastore_info::chan_fixup, channels, clone_variables(), ast_channel::connected, ast_datastore::data, ast_channel::dialed, errno, EVENT_FLAG_CALL, ast_channel::fdno, ast_channel::fds, ast_channel_tech::fixup, free_translation(), ast_channel_tech::hangup, ast_channel::hangupcause, ast_datastore::info, language, LOG_WARNING, ast_channel::masq, ast_channel::masqr, masquerade_colp_transfer(), ast_channel::monitor, musicclass, ast_channel::nativeformats, parkinglot, ast_channel::rawreadformat, ast_channel::rawwriteformat, ast_channel::readformat, ast_channel::redirecting, report_new_callerid(), S_OR, ast_channel::sending_dtmf_digit, ast_channel::sending_dtmf_tv, ast_channel::tech, ast_channel::tech_pvt, ast_channel::timingfd, xfer_masquerade_ds::transferee_held, ast_channel_tech::type, ast_channel::visible_indication, and ast_channel::writeformat.

Referenced by __ast_read(), ast_async_goto(), ast_do_pickup(), ast_hangup(), ast_waitfor_nandfds(), ast_write(), builtin_atxfer(), check_bridge(), check_goto_on_transfer(), do_bridge_masquerade(), handle_invite_replaces(), iax_park(), local_attended_transfer(), masq_park_call(), and sip_park().

{
   int x;
   int i;
   int origstate;
   unsigned int orig_disablestatecache;
   unsigned int clone_disablestatecache;
   int visible_indication;
   int clone_was_zombie = 0;/*!< TRUE if the clonechan was a zombie before the masquerade. */
   struct ast_frame *current;
   const struct ast_channel_tech *t;
   void *t_pvt;
   union {
      struct ast_party_dialed dialed;
      struct ast_party_caller caller;
      struct ast_party_connected_line connected;
      struct ast_party_redirecting redirecting;
   } exchange;
   struct ast_channel *clonechan, *chans[2];
   struct ast_channel *bridged;
   struct ast_cdr *cdr;
   struct ast_datastore *xfer_ds;
   struct xfer_masquerade_ds *xfer_colp;
   format_t rformat;
   format_t wformat;
   format_t tmp_format;
   char newn[AST_CHANNEL_NAME];
   char orig[AST_CHANNEL_NAME];
   char masqn[AST_CHANNEL_NAME];
   char zombn[AST_CHANNEL_NAME];
   char clone_sending_dtmf_digit;
   struct timeval clone_sending_dtmf_tv;

   /* XXX This operation is a bit odd.  We're essentially putting the guts of
    * the clone channel into the original channel.  Start by killing off the
    * original channel's backend.  While the features are nice, which is the
    * reason we're keeping it, it's still awesomely weird. XXX */

   /*
    * The reasoning for the channels ao2_container lock here is
    * complex.
    *
    * There is a race condition that exists for this function.
    * Since all pvt and channel locks must be let go before calling
    * ast_do_masquerade, it is possible that it could be called
    * multiple times for the same channel.  In order to prevent the
    * race condition with competing threads to do the masquerade
    * and new masquerade attempts, the channels container must be
    * locked for the entire masquerade.  The original and clonechan
    * need to be unlocked earlier to avoid potential deadlocks with
    * the chan_local deadlock avoidance method.
    *
    * The container lock blocks competing masquerade attempts from
    * starting as well as being necessary for proper locking order
    * because the channels must to be unlinked to change their
    * names.
    *
    * The original and clonechan locks must be held while the
    * channel contents are shuffled around for the masquerade.
    *
    * The masq and masqr pointers need to be left alone until the
    * masquerade has restabilized the channels to prevent another
    * masquerade request until the AST_FLAG_ZOMBIE can be set on
    * the clonechan.
    */
   ao2_lock(channels);

   /*
    * Lock the original channel to determine if the masquerade is
    * still required.
    */
   ast_channel_lock(original);

   clonechan = original->masq;
   if (!clonechan) {
      /*
       * The masq is already completed by another thread or never
       * needed to be done to begin with.
       */
      ast_channel_unlock(original);
      ao2_unlock(channels);
      return 0;
   }

   /* Bump the refs to ensure that they won't dissapear on us. */
   ast_channel_ref(original);
   ast_channel_ref(clonechan);

   /* unlink from channels container as name (which is the hash value) will change */
   ao2_unlink(channels, original);
   ao2_unlink(channels, clonechan);

   /* Get any transfer masquerade connected line exchange data. */
   xfer_ds = ast_channel_datastore_find(original, &xfer_ds_info, NULL);
   if (xfer_ds) {
      ast_channel_datastore_remove(original, xfer_ds);
      xfer_colp = xfer_ds->data;
   } else {
      xfer_colp = NULL;
   }

   /*
    * Stop any visible indication on the original channel so we can
    * transfer it to the clonechan taking the original's place.
    */
   visible_indication = original->visible_indication;
   ast_channel_unlock(original);
   ast_indicate(original, -1);

   /*
    * Release any hold on the transferee channel before going any
    * further with the masquerade.
    */
   if (xfer_colp && xfer_colp->transferee_held) {
      ast_indicate(clonechan, AST_CONTROL_UNHOLD);
   }

   /* Start the masquerade channel contents rearangement. */
   ast_channel_lock_both(original, clonechan);

   ast_debug(4, "Actually Masquerading %s(%d) into the structure of %s(%d)\n",
      clonechan->name, clonechan->_state, original->name, original->_state);

   chans[0] = clonechan;
   chans[1] = original;
   ast_manager_event_multichan(EVENT_FLAG_CALL, "Masquerade", 2, chans,
      "Clone: %s\r\n"
      "CloneState: %s\r\n"
      "Original: %s\r\n"
      "OriginalState: %s\r\n",
      clonechan->name, ast_state2str(clonechan->_state), original->name, ast_state2str(original->_state));

   /*
    * Remember the original read/write formats.  We turn off any
    * translation on either one
    */
   rformat = original->readformat;
   wformat = original->writeformat;
   free_translation(clonechan);
   free_translation(original);

   /* Save the current DTMF digit being sent if any. */
   clone_sending_dtmf_digit = clonechan->sending_dtmf_digit;
   clone_sending_dtmf_tv = clonechan->sending_dtmf_tv;

   /* Save the original name */
   ast_copy_string(orig, original->name, sizeof(orig));
   /* Save the new name */
   ast_copy_string(newn, clonechan->name, sizeof(newn));
   /* Create the masq name */
   snprintf(masqn, sizeof(masqn), "%s<MASQ>", newn);

   /* Mangle the name of the clone channel */
   __ast_change_name_nolink(clonechan, masqn);

   /* Copy the name from the clone channel */
   __ast_change_name_nolink(original, newn);

   /* share linked id's */
   ast_channel_set_linkgroup(original, clonechan);

   /* Swap the technologies */
   t = original->tech;
   original->tech = clonechan->tech;
   clonechan->tech = t;

   t_pvt = original->tech_pvt;
   original->tech_pvt = clonechan->tech_pvt;
   clonechan->tech_pvt = t_pvt;

   /* Swap the cdrs */
   cdr = original->cdr;
   original->cdr = clonechan->cdr;
   clonechan->cdr = cdr;

   /* Swap the alertpipes */
   for (i = 0; i < 2; i++) {
      x = original->alertpipe[i];
      original->alertpipe[i] = clonechan->alertpipe[i];
      clonechan->alertpipe[i] = x;
   }

   /*
    * Swap the readq's.  The end result should be this:
    *
    *  1) All frames should be on the new (original) channel.
    *  2) Any frames that were already on the new channel before this
    *     masquerade need to be at the end of the readq, after all of the
    *     frames on the old (clone) channel.
    *  3) The alertpipe needs to get poked for every frame that was already
    *     on the new channel, since we are now using the alert pipe from the
    *     old (clone) channel.
    */
   {
      AST_LIST_HEAD_NOLOCK(, ast_frame) tmp_readq;

      AST_LIST_HEAD_INIT_NOLOCK(&tmp_readq);
      AST_LIST_APPEND_LIST(&tmp_readq, &original->readq, frame_list);
      AST_LIST_APPEND_LIST(&original->readq, &clonechan->readq, frame_list);

      while ((current = AST_LIST_REMOVE_HEAD(&tmp_readq, frame_list))) {
         AST_LIST_INSERT_TAIL(&original->readq, current, frame_list);
         if (original->alertpipe[1] > -1) {
            int poke = 0;

            if (write(original->alertpipe[1], &poke, sizeof(poke)) < 0) {
               ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
            }
         }
      }
   }

   /* Swap the raw formats */
   tmp_format = original->rawreadformat;
   original->rawreadformat = clonechan->rawreadformat;
   clonechan->rawreadformat = tmp_format;

   tmp_format = original->rawwriteformat;
   original->rawwriteformat = clonechan->rawwriteformat;
   clonechan->rawwriteformat = tmp_format;

   clonechan->_softhangup = AST_SOFTHANGUP_DEV;

   /* And of course, so does our current state.  Note we need not
      call ast_setstate since the event manager doesn't really consider
      these separate.  We do this early so that the clone has the proper
      state of the original channel. */
   origstate = original->_state;
   original->_state = clonechan->_state;
   clonechan->_state = origstate;

   /* And the swap the cachable state too. Otherwise we'd start caching
    * Local channels and ignoring real ones. */
   orig_disablestatecache = ast_test_flag(original, AST_FLAG_DISABLE_DEVSTATE_CACHE);
   clone_disablestatecache = ast_test_flag(clonechan, AST_FLAG_DISABLE_DEVSTATE_CACHE);
   if (orig_disablestatecache != clone_disablestatecache) {
      if (orig_disablestatecache) {
         ast_clear_flag(original, AST_FLAG_DISABLE_DEVSTATE_CACHE);
         ast_set_flag(clonechan, AST_FLAG_DISABLE_DEVSTATE_CACHE);
      } else {
         ast_set_flag(original, AST_FLAG_DISABLE_DEVSTATE_CACHE);
         ast_clear_flag(clonechan, AST_FLAG_DISABLE_DEVSTATE_CACHE);
      }
   }

   /* Mangle the name of the clone channel */
   snprintf(zombn, sizeof(zombn), "%s<ZOMBIE>", orig); /* quick, hide the brains! */
   __ast_change_name_nolink(clonechan, zombn);

   /* Update the type. */
   t_pvt = original->monitor;
   original->monitor = clonechan->monitor;
   clonechan->monitor = t_pvt;

   /* Keep the same language.  */
   ast_string_field_set(original, language, clonechan->language);

   /* Keep the same parkinglot. */
   ast_string_field_set(original, parkinglot, clonechan->parkinglot);

   /* Copy the FD's other than the generator fd */
   for (x = 0; x < AST_MAX_FDS; x++) {
      if (x != AST_GENERATOR_FD)
         ast_channel_set_fd(original, x, clonechan->fds[x]);
   }

   ast_app_group_update(clonechan, original);

   /* Move data stores over */
   if (AST_LIST_FIRST(&clonechan->datastores)) {
      struct ast_datastore *ds;
      /* We use a safe traversal here because some fixup routines actually
       * remove the datastore from the list and free them.
       */
      AST_LIST_TRAVERSE_SAFE_BEGIN(&clonechan->datastores, ds, entry) {
         if (ds->info->chan_fixup)
            ds->info->chan_fixup(ds->data, clonechan, original);
      }
      AST_LIST_TRAVERSE_SAFE_END;
      AST_LIST_APPEND_LIST(&original->datastores, &clonechan->datastores, entry);
   }

   ast_autochan_new_channel(clonechan, original);

   clone_variables(original, clonechan);
   /* Presense of ADSI capable CPE follows clone */
   original->adsicpe = clonechan->adsicpe;
   /* Bridge remains the same */
   /* CDR fields remain the same */
   /* XXX What about blocking, softhangup, blocker, and lock and blockproc? XXX */
   /* Application and data remain the same */
   /* Clone exception  becomes real one, as with fdno */
   ast_set_flag(original, ast_test_flag(clonechan, AST_FLAG_EXCEPTION | AST_FLAG_OUTGOING));
   original->fdno = clonechan->fdno;
   /* Schedule context remains the same */
   /* Stream stuff stays the same */
   /* Keep the original state.  The fixup code will need to work with it most likely */

   /*
    * Just swap the whole structures, nevermind the allocations,
    * they'll work themselves out.
    */
   exchange.dialed = original->dialed;
   original->dialed = clonechan->dialed;
   clonechan->dialed = exchange.dialed;

   exchange.caller = original->caller;
   original->caller = clonechan->caller;
   clonechan->caller = exchange.caller;

   exchange.connected = original->connected;
   original->connected = clonechan->connected;
   clonechan->connected = exchange.connected;

   exchange.redirecting = original->redirecting;
   original->redirecting = clonechan->redirecting;
   clonechan->redirecting = exchange.redirecting;

   report_new_callerid(original);

   /* Restore original timing file descriptor */
   ast_channel_set_fd(original, AST_TIMING_FD, original->timingfd);

   /* Our native formats are different now */
   original->nativeformats = clonechan->nativeformats;

   /* Context, extension, priority, app data, jump table,  remain the same */
   /* pvt switches.  pbx stays the same, as does next */

   /* Set the write format */
   ast_set_write_format(original, wformat);

   /* Set the read format */
   ast_set_read_format(original, rformat);

   /* Copy the music class */
   ast_string_field_set(original, musicclass, clonechan->musicclass);

   /* copy over accuntcode and set peeraccount across the bridge */
   ast_string_field_set(original, accountcode, S_OR(clonechan->accountcode, ""));
   if (original->_bridge) {
      /* XXX - should we try to lock original->_bridge here? */
      ast_string_field_set(original->_bridge, peeraccount, S_OR(clonechan->accountcode, ""));
      ast_cel_report_event(original, AST_CEL_BRIDGE_UPDATE, NULL, NULL, NULL);
   }

   ast_debug(1, "Putting channel %s in %s/%s formats\n", original->name,
      ast_getformatname(wformat), ast_getformatname(rformat));

   /* Fixup the original clonechan's physical side */
   if (original->tech->fixup && original->tech->fixup(clonechan, original)) {
      ast_log(LOG_WARNING, "Channel type '%s' could not fixup channel %s, strange things may happen. (clonechan)\n",
         original->tech->type, original->name);
   }

   /* Fixup the original original's physical side */
   if (clonechan->tech->fixup && clonechan->tech->fixup(original, clonechan)) {
      ast_log(LOG_WARNING, "Channel type '%s' could not fixup channel %s, strange things may happen. (original)\n",
         clonechan->tech->type, clonechan->name);
   }

   /*
    * Now, at this point, the "clone" channel is totally F'd up.
    * We mark it as a zombie so nothing tries to touch it.  If it's
    * already been marked as a zombie, then we must free it (since
    * it already is considered invalid).
    *
    * This must be done before we unlock clonechan to prevent
    * setting up another masquerade on the clonechan.
    */
   if (ast_test_flag(clonechan, AST_FLAG_ZOMBIE)) {
      clone_was_zombie = 1;
   } else {
      ast_set_flag(clonechan, AST_FLAG_ZOMBIE);
      ast_queue_frame(clonechan, &ast_null_frame);
   }

   /* clear the masquerade channels */
   original->masq = NULL;
   clonechan->masqr = NULL;

   /*
    * When we unlock original here, it can be immediately setup to
    * masquerade again or hungup.  The new masquerade or hangup
    * will not actually happen until we release the channels
    * container lock.
    */
   ast_channel_unlock(original);

   /* Disconnect the original original's physical side */
   if (clonechan->tech->hangup && clonechan->tech->hangup(clonechan)) {
      ast_log(LOG_WARNING, "Hangup failed!  Strange things may happen!\n");
   } else {
      /*
       * We just hung up the original original's physical side of the
       * channel.  Set the new zombie to use the kill channel driver
       * for safety.
       */
      clonechan->tech = &ast_kill_tech;
   }

   ast_channel_unlock(clonechan);

   if (clone_sending_dtmf_digit) {
      /*
       * The clonechan was sending a DTMF digit that was not completed
       * before the masquerade.
       */
      ast_bridge_end_dtmf(original, clone_sending_dtmf_digit, clone_sending_dtmf_tv,
         "masquerade");
   }

   /*
    * If an indication is currently playing, maintain it on the
    * channel that is taking the place of original.
    *
    * This is needed because the masquerade is swapping out the
    * internals of the channel, and the new channel private data
    * needs to be made aware of the current visible indication
    * (RINGING, CONGESTION, etc.)
    */
   if (visible_indication) {
      ast_indicate(original, visible_indication);
   }

   ast_channel_lock(original);

   /* Signal any blocker */
   if (ast_test_flag(original, AST_FLAG_BLOCKING)) {
      pthread_kill(original->blocker, SIGURG);
   }

   ast_debug(1, "Done Masquerading %s (%d)\n", original->name, original->_state);

   if ((bridged = ast_bridged_channel(original))) {
      ast_channel_ref(bridged);
      ast_channel_unlock(original);
      ast_indicate(bridged, AST_CONTROL_SRCCHANGE);
      ast_channel_unref(bridged);
   } else {
      ast_channel_unlock(original);
   }
   ast_indicate(original, AST_CONTROL_SRCCHANGE);

   if (xfer_colp) {
      /*
       * After the masquerade, the original channel pointer actually
       * points to the new transferee channel and the bridged channel
       * is still the intended transfer target party.
       */
      masquerade_colp_transfer(original, xfer_colp);
   }

   if (xfer_ds) {
      ast_datastore_free(xfer_ds);
   }

   if (clone_was_zombie) {
      ast_channel_lock(clonechan);
      ast_debug(1, "Destroying channel clone '%s'\n", clonechan->name);
      ast_manager_event(clonechan, EVENT_FLAG_CALL, "Hangup",
         "Channel: %s\r\n"
         "Uniqueid: %s\r\n"
         "Cause: %d\r\n"
         "Cause-txt: %s\r\n",
         clonechan->name,
         clonechan->uniqueid,
         clonechan->hangupcause,
         ast_cause2str(clonechan->hangupcause)
         );
      ast_channel_unlock(clonechan);

      /*
       * Drop the system reference to destroy the channel since it is
       * already unlinked.
       */
      ast_channel_unref(clonechan);
   } else {
      ao2_link(channels, clonechan);
   }

   ao2_link(channels, original);
   ao2_unlock(channels);

   /* Release our held safety references. */
   ast_channel_unref(original);
   ast_channel_unref(clonechan);

   return 0;
}

static int ast_fdisset	(	struct pollfd *	pfds,
		int	fd,
		int	maximum,
		int *	start
	)			[inline, static]

Helper function for migrating select to poll.

Definition at line 2393 of file channel.h.

References dummy().

Referenced by do_monitor().

{
   int x;
   int dummy = 0;

   if (fd < 0)
      return 0;
   if (!start)
      start = &dummy;
   for (x = *start; x < maximum; x++)
      if (pfds[x].fd == fd) {
         if (x == *start)
            (*start)++;
         return pfds[x].revents;
      }
   return 0;
}

struct ast_channel_tech* ast_get_channel_tech

(

const char *

name

)

[read]

Get a channel technology structure by name.

Parameters:

name

name of technology to find

Returns:

a pointer to the structure, or NULL if no matching technology found

Definition at line 960 of file channel.c.

References AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, chanlist::tech, and ast_channel_tech::type.

Referenced by __ast_channel_alloc_ap(), _ast_device_state(), ast_cc_callback(), and ast_var_channel_types_table().

{
   struct chanlist *chanls;
   const struct ast_channel_tech *ret = NULL;

   AST_RWLIST_RDLOCK(&backends);

   AST_RWLIST_TRAVERSE(&backends, chanls, list) {
      if (!strcasecmp(name, chanls->tech->type)) {
         ret = chanls->tech;
         break;
      }
   }

   AST_RWLIST_UNLOCK(&backends);
   
   return ret;
}

ast_group_t ast_get_group

(

const char *

s

)

Definition at line 7925 of file channel.c.

References ast_log(), ast_strdupa, ast_strlen_zero(), LOG_ERROR, and LOG_WARNING.

Referenced by _parse(), build_device(), build_gateway(), build_peer(), config_parse_variables(), func_channel_write_real(), process_dahdi(), and read_agent_config().

{
   char *piece;
   char *c;
   int start=0, finish=0, x;
   ast_group_t group = 0;

   if (ast_strlen_zero(s))
      return 0;

   c = ast_strdupa(s);
   
   while ((piece = strsep(&c, ","))) {
      if (sscanf(piece, "%30d-%30d", &start, &finish) == 2) {
         /* Range */
      } else if (sscanf(piece, "%30d", &start)) {
         /* Just one */
         finish = start;
      } else {
         ast_log(LOG_ERROR, "Syntax error parsing group configuration '%s' at '%s'. Ignoring.\n", s, piece);
         continue;
      }
      for (x = start; x <= finish; x++) {
         if ((x > 63) || (x < 0)) {
            ast_log(LOG_WARNING, "Ignoring invalid group %d (maximum group is 63)\n", x);
         } else
            group |= ((ast_group_t) 1 << x);
      }
   }
   return group;
}

int ast_hangup

(

struct ast_channel *

chan

)

Hang up a channel.

Note:

Absolutely _NO_ channel locks should be held before calling this function.

This function performs a hard hangup on a channel. Unlike the soft-hangup, this function performs all stream stopping, etc, on the channel that needs to end. chan is no longer valid after this call.

Parameters:

chan

channel to hang up

Returns:

Returns 0 on success, -1 on failure.

Definition at line 2804 of file channel.c.

References ao2_unlink, ast_assert, ast_autoservice_stop(), ast_cause2str(), ast_cc_offer(), ast_cdr_detach(), ast_cdr_end(), AST_CDR_FLAG_BRIDGED, AST_CDR_FLAG_DIALED, AST_CDR_FLAG_POST_DISABLED, AST_CDR_NULL, AST_CEL_HANGUP, ast_cel_report_event(), ast_channel_lock, ast_channel_unlock, ast_channel_unref, ast_closestream(), ast_debug, ast_do_masquerade(), AST_FLAG_BLOCKING, AST_FLAG_ZOMBIE, ast_log(), ast_manager_event, ast_set_flag, ast_test_flag, ast_channel::blocker, ast_channel::blockproc, ast_channel::caller, ast_channel::cdr, channels, ast_channel::connected, destroy_hooks(), ast_cdr::disposition, EVENT_FLAG_CALL, free_translation(), ast_channel::generator, ast_channel::generatordata, ast_channel_tech::hangup, ast_channel::hangupcause, ast_party_connected_line::id, ast_party_caller::id, LOG_WARNING, ast_channel::masq, ast_channel::masqr, ast_party_id::name, ast_party_id::number, pbx_builtin_getvar_helper(), ast_generator::release, S_COR, S_OR, ast_channel::sched, sched_context_destroy(), ast_party_name::str, ast_party_number::str, ast_channel::stream, ast_channel::tech, ast_party_name::valid, ast_party_number::valid, and ast_channel::vstream.

Referenced by __analog_handle_event(), __analog_ss_thread(), __ast_pbx_run(), __ast_request_and_dial(), __oh323_new(), action_bridge(), agent_request(), alsa_new(), analog_handle_init_event(), analog_ss_thread(), answer_exec_run(), app_exec(), ast_async_goto(), ast_call_forward(), ast_dial_destroy(), ast_dial_hangup(), ast_iax2_new(), ast_pbx_outgoing_app(), ast_pbx_outgoing_exten(), ast_pbx_run_app(), async_wait(), begin_dial_channel(), bridge_call_thread(), bridge_call_thread_launch(), bridge_channel_thread(), bridge_exec(), build_conf(), builtin_atxfer(), chanavail_exec(), check_availability(), check_compat(), check_goto_on_transfer(), clear_caller(), conf_free(), conf_run(), console_new(), dahdi_handle_event(), dahdi_new(), destroy_conference_bridge(), dial_exec_full(), dial_transfer(), do_forward(), do_hang(), do_monitor(), feature_attended_transfer(), feature_request_and_dial(), findmeexec(), generic_recall(), gtalk_new(), handle_call_forward(), handle_callforward_button(), handle_enbloc_call_message(), handle_frame(), handle_frame_ownerless(), handle_hd_hf(), handle_init_event(), handle_invite_replaces(), handle_offhook_message(), handle_request_invite(), handle_soft_key_event_message(), handle_stimulus_message(), handle_timeout_trip(), handle_transfer_button(), HandleCallOutgoing(), hangup_chan(), hangupcalls(), hanguptree(), iax2_request(), iax_park(), iax_park_thread(), jingle_new(), local_hangup(), manage_parked_call(), masq_park_call(), meetme_menu_admin_extended(), mgcp_new(), mgcp_ss(), monitor_dial(), mwi_thread(), my_distinctive_ring(), my_handle_notify_message(), nbs_new(), oss_new(), parkandannounce_exec(), parked_call_exec(), phone_new(), play_sound_file(), sip_park(), sip_park_thread(), sip_pickup_thread(), skinny_new(), skinny_ss(), try_calling(), unistim_new(), wait_for_answer(), and wait_for_winner().

{
   char extra_str[64]; /* used for cel logging below */
   int was_zombie;

   ast_autoservice_stop(chan);

   ast_channel_lock(chan);

   /*
    * Do the masquerade if someone is setup to masquerade into us.
    *
    * NOTE: We must hold the channel lock after testing for a
    * pending masquerade and setting the channel as a zombie to
    * prevent __ast_channel_masquerade() from setting up a
    * masquerade with a dead channel.
    */
   while (chan->masq) {
      ast_channel_unlock(chan);
      ast_do_masquerade(chan);
      ast_channel_lock(chan);
   }

   if (chan->masqr) {
      /*
       * This channel is one which will be masqueraded into something.
       * Mark it as a zombie already so ast_do_masquerade() will know
       * to free it later.
       */
      ast_set_flag(chan, AST_FLAG_ZOMBIE);
      destroy_hooks(chan);
      ast_channel_unlock(chan);
      return 0;
   }

   /* Mark as a zombie so a masquerade cannot be setup on this channel. */
   if (!(was_zombie = ast_test_flag(chan, AST_FLAG_ZOMBIE))) {
      ast_set_flag(chan, AST_FLAG_ZOMBIE);
   }

   ast_channel_unlock(chan);
   ao2_unlink(channels, chan);
   ast_channel_lock(chan);

   destroy_hooks(chan);

   free_translation(chan);
   /* Close audio stream */
   if (chan->stream) {
      ast_closestream(chan->stream);
      chan->stream = NULL;
   }
   /* Close video stream */
   if (chan->vstream) {
      ast_closestream(chan->vstream);
      chan->vstream = NULL;
   }
   if (chan->sched) {
      sched_context_destroy(chan->sched);
      chan->sched = NULL;
   }

   if (chan->generatordata) { /* Clear any tone stuff remaining */
      if (chan->generator && chan->generator->release) {
         chan->generator->release(chan, chan->generatordata);
      }
   }
   chan->generatordata = NULL;
   chan->generator = NULL;

   snprintf(extra_str, sizeof(extra_str), "%d,%s,%s", chan->hangupcause, chan->hangupsource, S_OR(pbx_builtin_getvar_helper(chan, "DIALSTATUS"), ""));
   ast_cel_report_event(chan, AST_CEL_HANGUP, NULL, extra_str, NULL);

   if (ast_test_flag(chan, AST_FLAG_BLOCKING)) {
      ast_log(LOG_WARNING, "Hard hangup called by thread %ld on %s, while fd "
         "is blocked by thread %ld in procedure %s!  Expect a failure\n",
         (long) pthread_self(), chan->name, (long)chan->blocker, chan->blockproc);
      ast_assert(ast_test_flag(chan, AST_FLAG_BLOCKING) == 0);
   }
   if (!was_zombie) {
      ast_debug(1, "Hanging up channel '%s'\n", chan->name);

      if (chan->tech->hangup) {
         chan->tech->hangup(chan);
      }
   } else {
      ast_debug(1, "Hanging up zombie '%s'\n", chan->name);
   }

   ast_channel_unlock(chan);

   ast_cc_offer(chan);
   ast_manager_event(chan, EVENT_FLAG_CALL, "Hangup",
      "Channel: %s\r\n"
      "Uniqueid: %s\r\n"
      "CallerIDNum: %s\r\n"
      "CallerIDName: %s\r\n"
      "ConnectedLineNum: %s\r\n"
      "ConnectedLineName: %s\r\n"
      "Cause: %d\r\n"
      "Cause-txt: %s\r\n",
      chan->name,
      chan->uniqueid,
      S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, "<unknown>"),
      S_COR(chan->caller.id.name.valid, chan->caller.id.name.str, "<unknown>"),
      S_COR(chan->connected.id.number.valid, chan->connected.id.number.str, "<unknown>"),
      S_COR(chan->connected.id.name.valid, chan->connected.id.name.str, "<unknown>"),
      chan->hangupcause,
      ast_cause2str(chan->hangupcause)
      );

   if (chan->cdr && !ast_test_flag(chan->cdr, AST_CDR_FLAG_BRIDGED) &&
      !ast_test_flag(chan->cdr, AST_CDR_FLAG_POST_DISABLED) &&
      (chan->cdr->disposition != AST_CDR_NULL || ast_test_flag(chan->cdr, AST_CDR_FLAG_DIALED))) {
      ast_channel_lock(chan);
      ast_cdr_end(chan->cdr);
      ast_cdr_detach(chan->cdr);
      chan->cdr = NULL;
      ast_channel_unlock(chan);
   }

   ast_channel_unref(chan);

   return 0;
}

int ast_indicate	(	struct ast_channel *	chan,
		int	condition
	)

Indicates condition of channel.

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Indicate a condition such as AST_CONTROL_BUSY, AST_CONTROL_RINGING, or AST_CONTROL_CONGESTION on a channel

Parameters:

	chan	channel to change the indication
	condition	which condition to indicate on the channel

Returns:

Returns 0 on success, -1 on failure

Definition at line 4350 of file channel.c.

References ast_indicate_data().

Referenced by __ast_play_and_record(), agent_request(), alsa_call(), answer_trunk_chan(), ast_bridge_call(), ast_channel_bridge(), ast_do_masquerade(), ast_dtmf_stream(), ast_raw_answer(), attempt_transfer(), builtin_atxfer(), builtin_blindtransfer(), cli_console_answer(), conf_run(), console_call(), dial_exec_full(), dial_trunk(), disa_exec(), do_forward(), feature_request_and_dial(), finishup(), handle_callforward_button(), handle_frame(), handle_recordfile(), handle_request_refer(), local_attended_transfer(), manage_parked_call(), mgcp_ss(), monitor_dial(), oss_call(), park_call_full(), parked_call_exec(), pbx_builtin_busy(), pbx_builtin_congestion(), pbx_builtin_incomplete(), pbx_builtin_proceeding(), pbx_builtin_progress(), pbx_builtin_ringing(), pbx_builtin_waitexten(), queue_exec(), record_exec(), rna(), say_periodic_announcement(), say_position(), send_waveform_to_channel(), skinny_ss(), sla_handle_hold_event(), sla_station_exec(), sla_trunk_exec(), try_calling(), and wait_for_answer().

{
   return ast_indicate_data(chan, condition, NULL, 0);
}

int ast_indicate_data	(	struct ast_channel *	chan,
		int	condition,
		const void *	data,
		size_t	datalen
	)

Indicates condition of channel, with payload.

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Indicate a condition such as AST_CONTROL_HOLD with payload being music on hold class

Parameters:

	chan	channel to change the indication
	condition	which condition to indicate on the channel
	data	pointer to payload data
	datalen	size of payload data

Returns:

Returns 0 on success, -1 on failure

Note:

If we compare the enumeration type, which does not have any negative constants, the compiler may optimize this code away. Therefore, we must perform an integer comparison here.

Definition at line 4404 of file channel.c.

References ast_channel::_state, _XXX_AST_CONTROL_T38, ast_channel_lock, ast_channel_set_connected_line(), ast_channel_set_redirecting(), ast_channel_unlock, ast_check_hangup(), ast_connected_line_parse_data(), AST_CONTROL_ANSWER, AST_CONTROL_AOC, AST_CONTROL_BUSY, AST_CONTROL_CC, AST_CONTROL_CONGESTION, AST_CONTROL_CONNECTED_LINE, AST_CONTROL_END_OF_Q, AST_CONTROL_FLASH, AST_CONTROL_HANGUP, AST_CONTROL_HOLD, AST_CONTROL_INCOMPLETE, AST_CONTROL_OFFHOOK, AST_CONTROL_OPTION, AST_CONTROL_PROCEEDING, AST_CONTROL_PROGRESS, AST_CONTROL_RADIO_KEY, AST_CONTROL_RADIO_UNKEY, AST_CONTROL_READ_ACTION, AST_CONTROL_REDIRECTING, AST_CONTROL_RING, AST_CONTROL_RINGING, AST_CONTROL_SRCCHANGE, AST_CONTROL_SRCUPDATE, AST_CONTROL_T38_PARAMETERS, AST_CONTROL_TAKEOFFHOOK, AST_CONTROL_TRANSFER, AST_CONTROL_UNHOLD, AST_CONTROL_UPDATE_RTP_PEER, AST_CONTROL_VIDUPDATE, AST_CONTROL_WINK, ast_debug, AST_FLAG_ZOMBIE, AST_FRAME_CONTROL, ast_framehook_list_is_empty(), ast_framehook_list_write_event(), ast_frdup(), ast_frfree, ast_get_indication_tone(), ast_log(), ast_party_connected_line_free(), ast_party_connected_line_set_init(), ast_party_redirecting_free(), ast_party_redirecting_set_init(), ast_playtones_start(), ast_playtones_stop(), ast_redirecting_parse_data(), AST_STATE_UP, ast_test_flag, ast_tone_zone_sound_unref(), ast_channel::connected, ast_tone_zone_sound::data, ast_frame::data, ast_frame::datalen, ast_channel::framehooks, ast_frame::frametype, ast_channel_tech::indicate, ast_frame_subclass::integer, is_visible_indication(), LOG_WARNING, ast_frame::ptr, ast_channel::redirecting, ast_frame::subclass, ast_channel::tech, ast_channel::visible_indication, and ast_channel::zone.

Referenced by __ast_read(), action_aocmessage(), agent_hangup(), ast_bridge_call(), ast_channel_update_connected_line(), ast_channel_update_redirecting(), ast_generic_bridge(), ast_handle_cc_control_frame(), ast_indicate(), disable_t38(), feature_request_and_dial(), generic_fax_exec(), handle_frame(), local_bridge_loop(), login_exec(), manage_parked_call(), park_call_full(), pbx_builtin_waitexten(), receivefax_t38_init(), remote_bridge_loop(), sendfax_t38_init(), set_fax_t38_caps(), transmit_audio(), transmit_t38(), and wait_for_answer().

{
   /* By using an enum, we'll get compiler warnings for values not handled 
    * in switch statements. */
   enum ast_control_frame_type condition = _condition;
   struct ast_tone_zone_sound *ts = NULL;
   int res;
   /* this frame is used by framehooks. if it is set, we must free it at the end of this function */
   struct ast_frame *awesome_frame = NULL;

   ast_channel_lock(chan);

   /* Don't bother if the channel is about to go away, anyway. */
   if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
      res = -1;
      goto indicate_cleanup;
   }

   if (!ast_framehook_list_is_empty(chan->framehooks)) {
      /* Do framehooks now, do it, go, go now */
      struct ast_frame frame = {
         .frametype = AST_FRAME_CONTROL,
         .subclass.integer = condition,
         .data.ptr = (void *) data, /* this cast from const is only okay because we do the ast_frdup below */
         .datalen = datalen
      };

      /* we have now committed to freeing this frame */
      awesome_frame = ast_frdup(&frame);

      /* who knows what we will get back! the anticipation is killing me. */
      if (!(awesome_frame = ast_framehook_list_write_event(chan->framehooks, awesome_frame))
         || awesome_frame->frametype != AST_FRAME_CONTROL) {

         res = 0;
         goto indicate_cleanup;
      }

      condition = awesome_frame->subclass.integer;
      data = awesome_frame->data.ptr;
      datalen = awesome_frame->datalen;
   }

   switch (condition) {
   case AST_CONTROL_CONNECTED_LINE:
      {
         struct ast_party_connected_line connected;

         ast_party_connected_line_set_init(&connected, &chan->connected);
         res = ast_connected_line_parse_data(data, datalen, &connected);
         if (!res) {
            ast_channel_set_connected_line(chan, &connected, NULL);
         }
         ast_party_connected_line_free(&connected);
      }
      break;

   case AST_CONTROL_REDIRECTING:
      {
         struct ast_party_redirecting redirecting;

         ast_party_redirecting_set_init(&redirecting, &chan->redirecting);
         res = ast_redirecting_parse_data(data, datalen, &redirecting);
         if (!res) {
            ast_channel_set_redirecting(chan, &redirecting, NULL);
         }
         ast_party_redirecting_free(&redirecting);
      }
      break;
   
   default:
      break;
   }

   if (is_visible_indication(condition)) {
      /* A new visible indication is requested. */
      chan->visible_indication = condition;
   } else if (condition == AST_CONTROL_UNHOLD || _condition < 0) {
      /* Visible indication is cleared/stopped. */
      chan->visible_indication = 0;
   }

   if (chan->tech->indicate) {
      /* See if the channel driver can handle this condition. */
      res = chan->tech->indicate(chan, condition, data, datalen);
   } else {
      res = -1;
   }

   if (!res) {
      /* The channel driver successfully handled this indication */
      res = 0;
      goto indicate_cleanup;
   }

   /* The channel driver does not support this indication, let's fake
    * it by doing our own tone generation if applicable. */

   /*!\note If we compare the enumeration type, which does not have any
    * negative constants, the compiler may optimize this code away.
    * Therefore, we must perform an integer comparison here. */
   if (_condition < 0) {
      /* Stop any tones that are playing */
      ast_playtones_stop(chan);
      res = 0;
      goto indicate_cleanup;
   }

   /* Handle conditions that we have tones for. */
   switch (condition) {
   case _XXX_AST_CONTROL_T38:
      /* deprecated T.38 control frame */
      res = -1;
      goto indicate_cleanup;
   case AST_CONTROL_T38_PARAMETERS:
      /* there is no way to provide 'default' behavior for these
       * control frames, so we need to return failure, but there
       * is also no value in the log message below being emitted
       * since failure to handle these frames is not an 'error'
       * so just return right now. in addition, we want to return
       * whatever value the channel driver returned, in case it
       * has some meaning.*/
      goto indicate_cleanup;
   case AST_CONTROL_RINGING:
      ts = ast_get_indication_tone(chan->zone, "ring");
      /* It is common practice for channel drivers to return -1 if trying
       * to indicate ringing on a channel which is up. The idea is to let the
       * core generate the ringing inband. However, we don't want the
       * warning message about not being able to handle the specific indication
       * to print nor do we want ast_indicate_data to return an "error" for this
       * condition
       */
      if (chan->_state == AST_STATE_UP) {
         res = 0;
      }
      break;
   case AST_CONTROL_BUSY:
      ts = ast_get_indication_tone(chan->zone, "busy");
      break;
   case AST_CONTROL_INCOMPLETE:
   case AST_CONTROL_CONGESTION:
      ts = ast_get_indication_tone(chan->zone, "congestion");
      break;
   case AST_CONTROL_PROGRESS:
   case AST_CONTROL_PROCEEDING:
   case AST_CONTROL_VIDUPDATE:
   case AST_CONTROL_SRCUPDATE:
   case AST_CONTROL_SRCCHANGE:
   case AST_CONTROL_RADIO_KEY:
   case AST_CONTROL_RADIO_UNKEY:
   case AST_CONTROL_OPTION:
   case AST_CONTROL_WINK:
   case AST_CONTROL_FLASH:
   case AST_CONTROL_OFFHOOK:
   case AST_CONTROL_TAKEOFFHOOK:
   case AST_CONTROL_ANSWER:
   case AST_CONTROL_HANGUP:
   case AST_CONTROL_RING:
   case AST_CONTROL_HOLD:
   case AST_CONTROL_UNHOLD:
   case AST_CONTROL_TRANSFER:
   case AST_CONTROL_CONNECTED_LINE:
   case AST_CONTROL_REDIRECTING:
   case AST_CONTROL_CC:
   case AST_CONTROL_READ_ACTION:
   case AST_CONTROL_AOC:
   case AST_CONTROL_END_OF_Q:
   case AST_CONTROL_UPDATE_RTP_PEER:
      /* Nothing left to do for these. */
      res = 0;
      break;
   }

   if (ts) {
      /* We have a tone to play, yay. */
      ast_debug(1, "Driver for channel '%s' does not support indication %d, emulating it\n", chan->name, condition);
      res = ast_playtones_start(chan, 0, ts->data, 1);
      ts = ast_tone_zone_sound_unref(ts);
   }

   if (res) {
      /* not handled */
      ast_log(LOG_WARNING, "Unable to handle indication %d for '%s'\n", condition, chan->name);
   }

indicate_cleanup:
   ast_channel_unlock(chan);
   if (awesome_frame) {
      ast_frfree(awesome_frame);
   }

   return res;
}

int ast_internal_timing_enabled

(

struct ast_channel *

chan

)

Check if the channel can run in internal timing mode.

Parameters:

chan

The channel to check

Returns:

boolean

This function will return 1 if internal timing is enabled and the timing device is available.

Definition at line 4335 of file channel.c.

References ast_opt_internal_timing, and ast_channel::timingfd.

Referenced by add_sdp(), and ast_read_generator_actions().

{
   return (ast_opt_internal_timing && chan->timingfd > -1);
}

int ast_is_deferrable_frame

(

const struct ast_frame *

frame

)

Should we keep this frame for later?

There are functions such as ast_safe_sleep which will service a channel to ensure that it does not have a large backlog of queued frames. When this happens, we want to hold on to specific frame types and just drop others. This function will tell if the frame we just read should be held onto.

Parameters:

frame

The frame we just read

Return values:

	1	frame should be kept
	0	frame should be dropped

Definition at line 1818 of file channel.c.

References AST_FRAME_CNG, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, and ast_frame::frametype.

Referenced by ast_safe_sleep_conditional(), autoservice_run(), and feature_request_and_dial().

{
   /* Do not add a default entry in this switch statement.  Each new
    * frame type should be addressed directly as to whether it should
    * be queued up or not.
    */
   switch (frame->frametype) {
   case AST_FRAME_CONTROL:
   case AST_FRAME_TEXT:
   case AST_FRAME_IMAGE:
   case AST_FRAME_HTML:
      return 1;

   case AST_FRAME_DTMF_END:
   case AST_FRAME_DTMF_BEGIN:
   case AST_FRAME_VOICE:
   case AST_FRAME_VIDEO:
   case AST_FRAME_NULL:
   case AST_FRAME_IAX:
   case AST_FRAME_CNG:
   case AST_FRAME_MODEM:
      return 0;
   }
   return 0;
}

void ast_party_caller_copy	(	struct ast_party_caller *	dest,
		const struct ast_party_caller *	src
	)

Copy the source caller information to the destination caller.

Since:

1.8

Parameters:

	dest	Destination caller
	src	Source caller

Returns:

Nothing

Definition at line 2276 of file channel.c.

References ast_party_caller::ani, ast_party_caller::ani2, ast_party_id_copy(), and ast_party_caller::id.

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_party_id_copy(&dest->id, &src->id);
   ast_party_id_copy(&dest->ani, &src->ani);
   dest->ani2 = src->ani2;
}

void ast_party_caller_free

(

struct ast_party_caller *

doomed

)

Destroy the caller party contents.

Since:

1.8

Parameters:

doomed

The caller party to destroy.

Returns:

Nothing

Definition at line 2302 of file channel.c.

References ast_party_caller::ani, ast_party_id_free(), and ast_party_caller::id.

Referenced by ast_channel_destructor(), ast_dummy_channel_destructor(), callerid_write(), dial_trunk(), and sla_ring_station().

{
   ast_party_id_free(&doomed->id);
   ast_party_id_free(&doomed->ani);
}

void ast_party_caller_init

(

struct ast_party_caller *

init

)

Initialize the given caller structure.

Since:

1.8

Parameters:

init

Caller structure to initialize.

Returns:

Nothing

Definition at line 2269 of file channel.c.

References ast_party_caller::ani, ast_party_caller::ani2, ast_party_id_init(), and ast_party_caller::id.

Referenced by __ast_channel_alloc_ap(), dial_trunk(), and sla_ring_station().

{
   ast_party_id_init(&init->id);
   ast_party_id_init(&init->ani);
   init->ani2 = 0;
}

void ast_party_caller_set	(	struct ast_party_caller *	dest,
		const struct ast_party_caller *	src,
		const struct ast_set_party_caller *	update
	)

Set the caller information based on another caller source.

Since:

1.8

This is similar to ast_party_caller_copy, except that NULL values for strings in the src parameter indicate not to update the corresponding dest values.

Parameters:

	dest	The caller one wishes to update
	src	The new caller values to update the dest
	update	What caller information to update. NULL if all.

Returns:

Nada

Definition at line 2295 of file channel.c.

References ast_set_party_caller::ani, ast_party_caller::ani, ast_party_caller::ani2, ast_party_id_set(), ast_set_party_caller::id, and ast_party_caller::id.

Referenced by ast_channel_set_caller(), ast_channel_set_caller_event(), and callerid_write().

{
   ast_party_id_set(&dest->id, &src->id, update ? &update->id : NULL);
   ast_party_id_set(&dest->ani, &src->ani, update ? &update->ani : NULL);
   dest->ani2 = src->ani2;
}

void ast_party_caller_set_init	(	struct ast_party_caller *	init,
		const struct ast_party_caller *	guide
	)

Initialize the given caller structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Caller structure to initialize.
	guide	Source caller to use as a guide in initializing.

Returns:

Nothing

Definition at line 2288 of file channel.c.

References ast_party_caller::ani, ast_party_caller::ani2, ast_party_id_set_init(), and ast_party_caller::id.

Referenced by callerid_write(), dial_exec_full(), do_forward(), misdn_update_caller_id(), and ring_entry().

{
   ast_party_id_set_init(&init->id, &guide->id);
   ast_party_id_set_init(&init->ani, &guide->ani);
   init->ani2 = guide->ani2;
}

void ast_party_connected_line_collect_caller	(	struct ast_party_connected_line *	connected,
		struct ast_party_caller *	caller
	)

Collect the caller party information into a connected line structure.

Since:

1.8

Parameters:

	connected	Collected caller information for the connected line
	caller	Caller information.

Returns:

Nothing

Warning:

This is a shallow copy.

DO NOT call ast_party_connected_line_free() on the filled in connected line structure!

Definition at line 2345 of file channel.c.

References ast_party_caller::ani, ast_party_connected_line::ani, ast_party_caller::ani2, ast_party_connected_line::ani2, AST_CONNECTED_LINE_UPDATE_SOURCE_UNKNOWN, ast_party_caller::id, ast_party_connected_line::id, and ast_party_connected_line::source.

{
   connected->id = caller->id;
   connected->ani = caller->ani;
   connected->ani2 = caller->ani2;
   connected->source = AST_CONNECTED_LINE_UPDATE_SOURCE_UNKNOWN;
}

void ast_party_connected_line_copy	(	struct ast_party_connected_line *	dest,
		const struct ast_party_connected_line *	src
	)

Copy the source connected line information to the destination connected line.

Since:

1.8

Parameters:

	dest	Destination connected line
	src	Source connected line

Returns:

Nothing

Definition at line 2316 of file channel.c.

References ast_party_connected_line::ani, ast_party_connected_line::ani2, ast_party_id_copy(), ast_party_connected_line::id, and ast_party_connected_line::source.

Referenced by __ast_read(), ast_call_forward(), ast_channel_connected_line_macro(), ast_do_pickup(), builtin_atxfer(), dial_exec_full(), do_forward(), local_attended_transfer(), misdn_attempt_transfer(), party_connected_line_copy_transfer(), try_calling(), and wait_for_answer().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_party_id_copy(&dest->id, &src->id);
   ast_party_id_copy(&dest->ani, &src->ani);
   dest->ani2 = src->ani2;
   dest->source = src->source;
}

void ast_party_connected_line_free

(

struct ast_party_connected_line *

doomed

)

Destroy the connected line information contents.

Since:

1.8

Parameters:

doomed

The connected line information to destroy.

Returns:

Nothing

Definition at line 2353 of file channel.c.

References ast_party_connected_line::ani, ast_party_id_free(), and ast_party_connected_line::id.

Referenced by __ast_read(), app_exec(), ast_channel_connected_line_macro(), ast_channel_destructor(), ast_do_pickup(), ast_dummy_channel_destructor(), ast_indicate_data(), atxfer_fail_cleanup(), builtin_atxfer(), callattempt_free(), chanlist_free(), connectedline_write(), destroy_calling_tree(), feature_request_and_dial(), findmeexec(), local_attended_transfer(), misdn_attempt_transfer(), parked_call_exec(), socket_process(), wait_for_answer(), wait_for_winner(), and xfer_ds_destroy().

{
   ast_party_id_free(&doomed->id);
   ast_party_id_free(&doomed->ani);
}

void ast_party_connected_line_init

(

struct ast_party_connected_line *

init

)

Initialize the given connected line structure.

Since:

1.8

Parameters:

init

Connected line structure to initialize.

Returns:

Nothing

Definition at line 2308 of file channel.c.

References ast_party_connected_line::ani, ast_party_connected_line::ani2, AST_CONNECTED_LINE_UPDATE_SOURCE_UNKNOWN, ast_party_id_init(), ast_party_connected_line::id, and ast_party_connected_line::source.

Referenced by __ast_channel_alloc_ap(), __ast_read(), ast_channel_connected_line_macro(), ast_do_pickup(), builtin_atxfer(), do_forward(), handle_request_invite(), handle_request_update(), handle_response_invite(), local_attended_transfer(), misdn_attempt_transfer(), misdn_queue_connected_line_update(), parked_call_exec(), sip_call(), socket_process(), and wait_for_answer().

{
   ast_party_id_init(&init->id);
   ast_party_id_init(&init->ani);
   init->ani2 = 0;
   init->source = AST_CONNECTED_LINE_UPDATE_SOURCE_UNKNOWN;
}

void ast_party_connected_line_set	(	struct ast_party_connected_line *	dest,
		const struct ast_party_connected_line *	src,
		const struct ast_set_party_connected_line *	update
	)

Set the connected line information based on another connected line source.

Since:

1.8 This is similar to ast_party_connected_line_copy, except that NULL values for strings in the src parameter indicate not to update the corresponding dest values.

Parameters:

	dest	The connected line one wishes to update
	src	The new connected line values to update the dest
	update	What connected line information to update. NULL if all.

Returns:

Nothing

Definition at line 2337 of file channel.c.

References ast_set_party_connected_line::ani, ast_party_connected_line::ani, ast_party_connected_line::ani2, ast_party_id_set(), ast_set_party_connected_line::id, ast_party_connected_line::id, and ast_party_connected_line::source.

Referenced by ast_channel_set_connected_line(), wait_for_answer(), and wait_for_winner().

{
   ast_party_id_set(&dest->id, &src->id, update ? &update->id : NULL);
   ast_party_id_set(&dest->ani, &src->ani, update ? &update->ani : NULL);
   dest->ani2 = src->ani2;
   dest->source = src->source;
}

void ast_party_connected_line_set_init	(	struct ast_party_connected_line *	init,
		const struct ast_party_connected_line *	guide
	)

Initialize the given connected line structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Connected line structure to initialize.
	guide	Source connected line to use as a guide in initializing.

Returns:

Nothing

Definition at line 2329 of file channel.c.

References ast_party_connected_line::ani, ast_party_connected_line::ani2, ast_party_id_set_init(), ast_party_connected_line::id, and ast_party_connected_line::source.

Referenced by __ast_request_and_dial(), ast_indicate_data(), connectedline_write(), dial_exec_full(), feature_request_and_dial(), wait_for_answer(), and wait_for_winner().

{
   ast_party_id_set_init(&init->id, &guide->id);
   ast_party_id_set_init(&init->ani, &guide->ani);
   init->ani2 = guide->ani2;
   init->source = guide->source;
}

void ast_party_dialed_copy	(	struct ast_party_dialed *	dest,
		const struct ast_party_dialed *	src
	)

Copy the source dialed party information to the destination dialed party.

Since:

1.8

Parameters:

	dest	Destination dialed party
	src	Source dialed party

Returns:

Nothing

Definition at line 2227 of file channel.c.

References ast_free, ast_party_subaddress_copy(), ast_strdup, ast_party_dialed::number, ast_party_dialed::plan, ast_party_dialed::str, ast_party_dialed::subaddress, and ast_party_dialed::transit_network_select.

Referenced by local_call().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_free(dest->number.str);
   dest->number.str = ast_strdup(src->number.str);
   dest->number.plan = src->number.plan;
   ast_party_subaddress_copy(&dest->subaddress, &src->subaddress);
   dest->transit_network_select = src->transit_network_select;
}

void ast_party_dialed_free

(

struct ast_party_dialed *

doomed

)

Destroy the dialed party contents.

Since:

1.8

Parameters:

doomed

The dialed party to destroy.

Returns:

Nothing

Definition at line 2262 of file channel.c.

References ast_free, ast_party_subaddress_free(), ast_party_dialed::number, ast_party_dialed::str, and ast_party_dialed::subaddress.

Referenced by ast_channel_destructor(), ast_dummy_channel_destructor(), and callerid_write().

{
   ast_free(doomed->number.str);
   doomed->number.str = NULL;
   ast_party_subaddress_free(&doomed->subaddress);
}

void ast_party_dialed_init

(

struct ast_party_dialed *

init

)

Initialize the given dialed structure.

Since:

1.8

Parameters:

init

Dialed structure to initialize.

Returns:

Nothing

Definition at line 2219 of file channel.c.

References ast_party_subaddress_init(), ast_party_dialed::number, ast_party_dialed::plan, ast_party_dialed::str, ast_party_dialed::subaddress, and ast_party_dialed::transit_network_select.

Referenced by __ast_channel_alloc_ap().

{
   init->number.str = NULL;
   init->number.plan = 0;/* Unknown */
   ast_party_subaddress_init(&init->subaddress);
   init->transit_network_select = 0;
}

void ast_party_dialed_set	(	struct ast_party_dialed *	dest,
		const struct ast_party_dialed *	src
	)

Set the dialed information based on another dialed source.

Since:

1.8

This is similar to ast_party_dialed_copy, except that NULL values for strings in the src parameter indicate not to update the corresponding dest values.

Parameters:

	dest	The dialed one wishes to update
	src	The new dialed values to update the dest

Returns:

Nada

Definition at line 2249 of file channel.c.

References ast_free, ast_party_subaddress_set(), ast_strdup, ast_party_dialed::number, ast_party_dialed::plan, ast_party_dialed::str, ast_party_dialed::subaddress, and ast_party_dialed::transit_network_select.

Referenced by callerid_write().

{
   if (src->number.str && src->number.str != dest->number.str) {
      ast_free(dest->number.str);
      dest->number.str = ast_strdup(src->number.str);
   }
   dest->number.plan = src->number.plan;

   ast_party_subaddress_set(&dest->subaddress, &src->subaddress);

   dest->transit_network_select = src->transit_network_select;
}

void ast_party_dialed_set_init	(	struct ast_party_dialed *	init,
		const struct ast_party_dialed *	guide
	)

Initialize the given dialed structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Caller structure to initialize.
	guide	Source dialed to use as a guide in initializing.

Returns:

Nothing

Definition at line 2241 of file channel.c.

References ast_party_subaddress_set_init(), ast_party_dialed::number, ast_party_dialed::plan, ast_party_dialed::str, ast_party_dialed::subaddress, and ast_party_dialed::transit_network_select.

Referenced by callerid_write().

{
   init->number.str = NULL;
   init->number.plan = guide->number.plan;
   ast_party_subaddress_set_init(&init->subaddress, &guide->subaddress);
   init->transit_network_select = guide->transit_network_select;
}

void ast_party_id_copy	(	struct ast_party_id *	dest,
		const struct ast_party_id *	src
	)

Copy the source party id information to the destination party id.

Since:

1.8

Parameters:

	dest	Destination party id
	src	Source party id

Returns:

Nothing

Definition at line 2095 of file channel.c.

References ast_free, ast_party_name_copy(), ast_party_number_copy(), ast_party_subaddress_copy(), ast_strdup, ast_party_id::name, ast_party_id::number, ast_party_id::subaddress, and ast_party_id::tag.

Referenced by ast_connected_line_copy_from_caller(), ast_connected_line_copy_to_caller(), ast_party_caller_copy(), ast_party_connected_line_copy(), ast_party_redirecting_copy(), and parkandannounce_exec().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_party_name_copy(&dest->name, &src->name);
   ast_party_number_copy(&dest->number, &src->number);
   ast_party_subaddress_copy(&dest->subaddress, &src->subaddress);

   ast_free(dest->tag);
   dest->tag = ast_strdup(src->tag);
}

void ast_party_id_free

(

struct ast_party_id *

doomed

)

Destroy the party id contents.

Since:

1.8

Parameters:

doomed

The party id to destroy.

Returns:

Nothing

Definition at line 2141 of file channel.c.

References ast_free, ast_party_name_free(), ast_party_number_free(), ast_party_subaddress_free(), ast_party_id::name, ast_party_id::number, ast_party_id::subaddress, and ast_party_id::tag.

Referenced by ast_party_caller_free(), ast_party_connected_line_free(), ast_party_redirecting_free(), and parkandannounce_exec().

{
   ast_party_name_free(&doomed->name);
   ast_party_number_free(&doomed->number);
   ast_party_subaddress_free(&doomed->subaddress);

   ast_free(doomed->tag);
   doomed->tag = NULL;
}

void ast_party_id_init

(

struct ast_party_id *

init

)

Initialize the given party id structure.

Since:

1.8

Parameters:

init

Party id structure to initialize.

Returns:

Nothing

Definition at line 2087 of file channel.c.

References ast_party_name_init(), ast_party_number_init(), ast_party_subaddress_init(), ast_party_id::name, ast_party_id::number, ast_party_id::subaddress, and ast_party_id::tag.

Referenced by ast_party_caller_init(), ast_party_connected_line_init(), ast_party_redirecting_init(), dial_exec_full(), and parkandannounce_exec().

{
   ast_party_name_init(&init->name);
   ast_party_number_init(&init->number);
   ast_party_subaddress_init(&init->subaddress);
   init->tag = NULL;
}

int ast_party_id_presentation

(

const struct ast_party_id *

id

)

Determine the overall presentation value for the given party.

Since:

1.8

Parameters:

id

Party to determine the overall presentation value.

Returns:

Overall presentation value for the given party.

Definition at line 2151 of file channel.c.

References AST_PRES_ALLOWED, AST_PRES_NUMBER_NOT_AVAILABLE, AST_PRES_NUMBER_TYPE, AST_PRES_RESTRICTED, AST_PRES_RESTRICTION, AST_PRES_UNAVAILABLE, AST_PRES_USER_NUMBER_UNSCREENED, ast_party_id::name, ast_party_id::number, ast_party_number::valid, and ast_party_name::valid.

Referenced by add_rpid(), ast_str_retrieve_variable(), ast_var_channels_table(), callerpres_read(), iax2_call(), initreqprep(), oh323_call(), party_id_build_data(), party_id_read(), redirecting_read(), report_new_callerid(), setup_env(), sip_call(), and socket_process().

{
   int number_priority;
   int number_value;
   int number_screening;
   int name_priority;
   int name_value;

   /* Determine name presentation priority. */
   if (!id->name.valid) {
      name_value = AST_PRES_UNAVAILABLE;
      name_priority = 3;
   } else {
      name_value = id->name.presentation & AST_PRES_RESTRICTION;
      switch (name_value) {
      case AST_PRES_RESTRICTED:
         name_priority = 0;
         break;
      case AST_PRES_ALLOWED:
         name_priority = 1;
         break;
      case AST_PRES_UNAVAILABLE:
         name_priority = 2;
         break;
      default:
         name_value = AST_PRES_UNAVAILABLE;
         name_priority = 3;
         break;
      }
   }

   /* Determine number presentation priority. */
   if (!id->number.valid) {
      number_screening = AST_PRES_USER_NUMBER_UNSCREENED;
      number_value = AST_PRES_UNAVAILABLE;
      number_priority = 3;
   } else {
      number_screening = id->number.presentation & AST_PRES_NUMBER_TYPE;
      number_value = id->number.presentation & AST_PRES_RESTRICTION;
      switch (number_value) {
      case AST_PRES_RESTRICTED:
         number_priority = 0;
         break;
      case AST_PRES_ALLOWED:
         number_priority = 1;
         break;
      case AST_PRES_UNAVAILABLE:
         number_priority = 2;
         break;
      default:
         number_screening = AST_PRES_USER_NUMBER_UNSCREENED;
         number_value = AST_PRES_UNAVAILABLE;
         number_priority = 3;
         break;
      }
   }

   /* Select the wining presentation value. */
   if (name_priority < number_priority) {
      number_value = name_value;
   }
   if (number_value == AST_PRES_UNAVAILABLE) {
      return AST_PRES_NUMBER_NOT_AVAILABLE;
   }

   return number_value | number_screening;
}

void ast_party_id_set	(	struct ast_party_id *	dest,
		const struct ast_party_id *	src,
		const struct ast_set_party_id *	update
	)

Set the source party id information into the destination party id.

Since:

1.8

Parameters:

	dest	The id one wishes to update
	src	The new id values to update the dest
	update	What id information to update. NULL if all.

Returns:

Nothing

Definition at line 2118 of file channel.c.

References ast_free, ast_party_name_set(), ast_party_number_set(), ast_party_subaddress_set(), ast_strdup, ast_party_id::name, ast_set_party_id::name, ast_party_id::number, ast_set_party_id::number, ast_party_id::subaddress, ast_set_party_id::subaddress, and ast_party_id::tag.

Referenced by ast_party_caller_set(), ast_party_connected_line_set(), and ast_party_redirecting_set().

{
   if (dest == src) {
      /* Don't set to self */
      return;
   }

   if (!update || update->name) {
      ast_party_name_set(&dest->name, &src->name);
   }
   if (!update || update->number) {
      ast_party_number_set(&dest->number, &src->number);
   }
   if (!update || update->subaddress) {
      ast_party_subaddress_set(&dest->subaddress, &src->subaddress);
   }

   if (src->tag && src->tag != dest->tag) {
      ast_free(dest->tag);
      dest->tag = ast_strdup(src->tag);
   }
}

void ast_party_id_set_init	(	struct ast_party_id *	init,
		const struct ast_party_id *	guide
	)

Initialize the given party id structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Party id structure to initialize.
	guide	Source party id to use as a guide in initializing.

Returns:

Nothing

Definition at line 2110 of file channel.c.

References ast_party_name_set_init(), ast_party_number_set_init(), ast_party_subaddress_set_init(), ast_party_id::name, ast_party_id::number, ast_party_id::subaddress, and ast_party_id::tag.

Referenced by ast_party_caller_set_init(), ast_party_connected_line_set_init(), ast_party_redirecting_set_init(), and dial_exec_full().

{
   ast_party_name_set_init(&init->name, &guide->name);
   ast_party_number_set_init(&init->number, &guide->number);
   ast_party_subaddress_set_init(&init->subaddress, &guide->subaddress);
   init->tag = NULL;
}

void ast_party_name_copy	(	struct ast_party_name *	dest,
		const struct ast_party_name *	src
	)

Copy the source party name information to the destination party name.

Since:

1.8

Parameters:

	dest	Destination party name
	src	Source party name

Returns:

Nothing

Definition at line 1936 of file channel.c.

References ast_free, ast_strdup, ast_party_name::char_set, ast_party_name::presentation, ast_party_name::str, and ast_party_name::valid.

Referenced by ast_party_id_copy().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_free(dest->str);
   dest->str = ast_strdup(src->str);
   dest->char_set = src->char_set;
   dest->presentation = src->presentation;
   dest->valid = src->valid;
}

void ast_party_name_free

(

struct ast_party_name *

doomed

)

Destroy the party name contents.

Since:

1.8

Parameters:

doomed

The party name to destroy.

Returns:

Nothing

Definition at line 1975 of file channel.c.

References ast_free, and ast_party_name::str.

Referenced by __analog_ss_thread(), analog_ss_thread(), ast_party_id_free(), and skinny_newcall().

{
   ast_free(doomed->str);
   doomed->str = NULL;
}

void ast_party_name_init

(

struct ast_party_name *

init

)

Initialize the given name structure.

Since:

1.8

Parameters:

init

Name structure to initialize.

Returns:

Nothing

Definition at line 1928 of file channel.c.

References AST_PARTY_CHAR_SET_ISO8859_1, AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED, ast_party_name::char_set, ast_party_name::presentation, ast_party_name::str, and ast_party_name::valid.

Referenced by __analog_ss_thread(), analog_ss_thread(), ast_party_id_init(), and skinny_newcall().

{
   init->str = NULL;
   init->char_set = AST_PARTY_CHAR_SET_ISO8859_1;
   init->presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
   init->valid = 0;
}

void ast_party_name_set	(	struct ast_party_name *	dest,
		const struct ast_party_name *	src
	)

Set the source party name information into the destination party name.

Since:

1.8

Parameters:

	dest	The name one wishes to update
	src	The new name values to update the dest

Returns:

Nothing

Definition at line 1958 of file channel.c.

References ast_free, ast_strdup, ast_party_name::char_set, ast_party_name::presentation, ast_party_name::str, and ast_party_name::valid.

Referenced by ast_party_id_set().

{
   if (dest == src) {
      /* Don't set to self */
      return;
   }

   if (src->str && src->str != dest->str) {
      ast_free(dest->str);
      dest->str = ast_strdup(src->str);
   }

   dest->char_set = src->char_set;
   dest->presentation = src->presentation;
   dest->valid = src->valid;
}

void ast_party_name_set_init	(	struct ast_party_name *	init,
		const struct ast_party_name *	guide
	)

Initialize the given party name structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Party name structure to initialize.
	guide	Source party name to use as a guide in initializing.

Returns:

Nothing

Definition at line 1950 of file channel.c.

References ast_party_name::char_set, ast_party_name::presentation, ast_party_name::str, and ast_party_name::valid.

Referenced by ast_party_id_set_init().

{
   init->str = NULL;
   init->char_set = guide->char_set;
   init->presentation = guide->presentation;
   init->valid = guide->valid;
}

void ast_party_number_copy	(	struct ast_party_number *	dest,
		const struct ast_party_number *	src
	)

Copy the source party number information to the destination party number.

Since:

1.8

Parameters:

	dest	Destination party number
	src	Source party number

Returns:

Nothing

Definition at line 1989 of file channel.c.

References ast_free, ast_strdup, ast_party_number::plan, ast_party_number::presentation, ast_party_number::str, and ast_party_number::valid.

Referenced by ast_party_id_copy().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_free(dest->str);
   dest->str = ast_strdup(src->str);
   dest->plan = src->plan;
   dest->presentation = src->presentation;
   dest->valid = src->valid;
}

void ast_party_number_free

(

struct ast_party_number *

doomed

)

Destroy the party number contents.

Since:

1.8

Parameters:

doomed

The party number to destroy.

Returns:

Nothing

Definition at line 2028 of file channel.c.

References ast_free, and ast_party_number::str.

Referenced by __analog_ss_thread(), analog_ss_thread(), ast_party_id_free(), do_forward(), skinny_newcall(), and wait_for_answer().

{
   ast_free(doomed->str);
   doomed->str = NULL;
}

void ast_party_number_init

(

struct ast_party_number *

init

)

Initialize the given number structure.

Since:

1.8

Parameters:

init

Number structure to initialize.

Returns:

Nothing

Definition at line 1981 of file channel.c.

References AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED, ast_party_number::plan, ast_party_number::presentation, ast_party_number::str, and ast_party_number::valid.

Referenced by __analog_ss_thread(), analog_ss_thread(), ast_party_id_init(), do_forward(), skinny_newcall(), and wait_for_answer().

{
   init->str = NULL;
   init->plan = 0;/* Unknown */
   init->presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
   init->valid = 0;
}

void ast_party_number_set	(	struct ast_party_number *	dest,
		const struct ast_party_number *	src
	)

Set the source party number information into the destination party number.

Since:

1.8

Parameters:

	dest	The number one wishes to update
	src	The new number values to update the dest

Returns:

Nothing

Definition at line 2011 of file channel.c.

References ast_free, ast_strdup, ast_party_number::plan, ast_party_number::presentation, ast_party_number::str, and ast_party_number::valid.

Referenced by ast_party_id_set().

{
   if (dest == src) {
      /* Don't set to self */
      return;
   }

   if (src->str && src->str != dest->str) {
      ast_free(dest->str);
      dest->str = ast_strdup(src->str);
   }

   dest->plan = src->plan;
   dest->presentation = src->presentation;
   dest->valid = src->valid;
}

void ast_party_number_set_init	(	struct ast_party_number *	init,
		const struct ast_party_number *	guide
	)

Initialize the given party number structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Party number structure to initialize.
	guide	Source party number to use as a guide in initializing.

Returns:

Nothing

Definition at line 2003 of file channel.c.

References ast_party_number::plan, ast_party_number::presentation, ast_party_number::str, and ast_party_number::valid.

Referenced by ast_party_id_set_init().

{
   init->str = NULL;
   init->plan = guide->plan;
   init->presentation = guide->presentation;
   init->valid = guide->valid;
}

void ast_party_redirecting_copy	(	struct ast_party_redirecting *	dest,
		const struct ast_party_redirecting *	src
	)

Copy the source redirecting information to the destination redirecting.

Since:

1.8

Parameters:

	dest	Destination redirecting
	src	Source redirecting

Returns:

Nothing

Definition at line 2367 of file channel.c.

References ast_party_id_copy(), ast_party_redirecting::count, ast_party_redirecting::from, ast_party_redirecting::reason, and ast_party_redirecting::to.

Referenced by ast_call_forward(), ast_channel_redirecting_macro(), begin_dial_channel(), call_forward_inherit(), dial_exec_full(), do_forward(), local_call(), ring_entry(), and wait_for_answer().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_party_id_copy(&dest->from, &src->from);
   ast_party_id_copy(&dest->to, &src->to);
   dest->count = src->count;
   dest->reason = src->reason;
}

void ast_party_redirecting_free

(

struct ast_party_redirecting *

doomed

)

Destroy the redirecting information contents.

Since:

1.8

Parameters:

doomed

The redirecting information to destroy.

Returns:

Nothing

Definition at line 2396 of file channel.c.

References ast_party_id_free(), ast_party_redirecting::from, and ast_party_redirecting::to.

Referenced by ast_channel_destructor(), ast_channel_redirecting_macro(), ast_dummy_channel_destructor(), ast_indicate_data(), call_forward_inherit(), do_forward(), handle_request_invite(), handle_response(), handle_response_invite(), redirecting_write(), and wait_for_answer().

{
   ast_party_id_free(&doomed->from);
   ast_party_id_free(&doomed->to);
}

void ast_party_redirecting_init

(

struct ast_party_redirecting *

init

)

Initialize the given redirecting structure.

Since:

1.8

Parameters:

init

Redirecting structure to initialize.

Returns:

Nothing

Definition at line 2359 of file channel.c.

References ast_party_id_init(), AST_REDIRECTING_REASON_UNKNOWN, ast_party_redirecting::count, ast_party_redirecting::from, ast_party_redirecting::reason, and ast_party_redirecting::to.

Referenced by __ast_channel_alloc_ap(), ast_channel_redirecting_macro(), call_forward_inherit(), do_forward(), handle_request_invite(), handle_response(), handle_response_invite(), and wait_for_answer().

{
   ast_party_id_init(&init->from);
   ast_party_id_init(&init->to);
   init->count = 0;
   init->reason = AST_REDIRECTING_REASON_UNKNOWN;
}

void ast_party_redirecting_set	(	struct ast_party_redirecting *	dest,
		const struct ast_party_redirecting *	src,
		const struct ast_set_party_redirecting *	update
	)

Set the redirecting information based on another redirecting source.

Since:

1.8

This is similar to ast_party_redirecting_copy, except that NULL values for strings in the src parameter indicate not to update the corresponding dest values.

Parameters:

	dest	The redirecting one wishes to update
	src	The new redirecting values to update the dest
	update	What redirecting information to update. NULL if all.

Returns:

Nothing

Definition at line 2388 of file channel.c.

References ast_party_id_set(), ast_party_redirecting::count, ast_set_party_redirecting::from, ast_party_redirecting::from, ast_party_redirecting::reason, ast_set_party_redirecting::to, and ast_party_redirecting::to.

Referenced by ast_channel_set_redirecting().

{
   ast_party_id_set(&dest->from, &src->from, update ? &update->from : NULL);
   ast_party_id_set(&dest->to, &src->to, update ? &update->to : NULL);
   dest->reason = src->reason;
   dest->count = src->count;
}

void ast_party_redirecting_set_init	(	struct ast_party_redirecting *	init,
		const struct ast_party_redirecting *	guide
	)

Initialize the given redirecting id structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Redirecting id structure to initialize.
	guide	Source redirecting id to use as a guide in initializing.

Returns:

Nothing

Definition at line 2380 of file channel.c.

References ast_party_id_set_init(), ast_party_redirecting::count, ast_party_redirecting::from, ast_party_redirecting::reason, and ast_party_redirecting::to.

Referenced by ast_indicate_data(), misdn_copy_redirecting_to_ast(), and redirecting_write().

{
   ast_party_id_set_init(&init->from, &guide->from);
   ast_party_id_set_init(&init->to, &guide->to);
   init->count = guide->count;
   init->reason = guide->reason;
}

void ast_party_subaddress_copy	(	struct ast_party_subaddress *	dest,
		const struct ast_party_subaddress *	src
	)

Copy the source party subaddress information to the destination party subaddress.

Since:

1.8

Parameters:

	dest	Destination party subaddress
	src	Source party subaddress

Returns:

Nothing

Definition at line 2042 of file channel.c.

References ast_free, ast_strdup, ast_party_subaddress::odd_even_indicator, ast_party_subaddress::str, ast_party_subaddress::type, and ast_party_subaddress::valid.

Referenced by ast_party_dialed_copy(), and ast_party_id_copy().

{
   if (dest == src) {
      /* Don't copy to self */
      return;
   }

   ast_free(dest->str);
   dest->str = ast_strdup(src->str);
   dest->type = src->type;
   dest->odd_even_indicator = src->odd_even_indicator;
   dest->valid = src->valid;
}

void ast_party_subaddress_free

(

struct ast_party_subaddress *

doomed

)

Destroy the party subaddress contents.

Since:

1.8

Parameters:

doomed

The party subaddress to destroy.

Returns:

Nothing

Definition at line 2081 of file channel.c.

References ast_free, and ast_party_subaddress::str.

Referenced by ast_party_dialed_free(), and ast_party_id_free().

{
   ast_free(doomed->str);
   doomed->str = NULL;
}

void ast_party_subaddress_init

(

struct ast_party_subaddress *

init

)

Initialize the given subaddress structure.

Since:

1.8

Parameters:

init

Subaddress structure to initialize.

Returns:

Nothing

Definition at line 2034 of file channel.c.

References ast_party_subaddress::odd_even_indicator, ast_party_subaddress::str, ast_party_subaddress::type, and ast_party_subaddress::valid.

Referenced by ast_party_dialed_init(), and ast_party_id_init().

{
   init->str = NULL;
   init->type = 0;
   init->odd_even_indicator = 0;
   init->valid = 0;
}

void ast_party_subaddress_set	(	struct ast_party_subaddress *	dest,
		const struct ast_party_subaddress *	src
	)

Set the source party subaddress information into the destination party subaddress.

Since:

1.8

Parameters:

	dest	The subaddress one wishes to update
	src	The new subaddress values to update the dest

Returns:

Nothing

Definition at line 2064 of file channel.c.

References ast_free, ast_strdup, ast_party_subaddress::odd_even_indicator, ast_party_subaddress::str, ast_party_subaddress::type, and ast_party_subaddress::valid.

Referenced by ast_party_dialed_set(), and ast_party_id_set().

{
   if (dest == src) {
      /* Don't set to self */
      return;
   }

   if (src->str && src->str != dest->str) {
      ast_free(dest->str);
      dest->str = ast_strdup(src->str);
   }

   dest->type = src->type;
   dest->odd_even_indicator = src->odd_even_indicator;
   dest->valid = src->valid;
}

void ast_party_subaddress_set_init	(	struct ast_party_subaddress *	init,
		const struct ast_party_subaddress *	guide
	)

Initialize the given party subaddress structure using the given guide for a set update operation.

Since:

1.8

The initialization is needed to allow a set operation to know if a value needs to be updated. Simple integers need the guide's original value in case the set operation is not trying to set a new value. String values are simply set to NULL pointers if they are not going to be updated.

Parameters:

	init	Party subaddress structure to initialize.
	guide	Source party subaddress to use as a guide in initializing.

Returns:

Nothing

Definition at line 2056 of file channel.c.

References ast_party_subaddress::odd_even_indicator, ast_party_subaddress::str, ast_party_subaddress::type, and ast_party_subaddress::valid.

Referenced by ast_party_dialed_set_init(), and ast_party_id_set_init().

{
   init->str = NULL;
   init->type = guide->type;
   init->odd_even_indicator = guide->odd_even_indicator;
   init->valid = guide->valid;
}

void ast_poll_channel_add	(	struct ast_channel *	chan0,
		struct ast_channel *	chan1
	)

Add a channel to an optimized waitfor

Definition at line 2665 of file channel.c.

References AST_MAX_FDS, and ast_channel::fds.

Referenced by ast_generic_bridge(), begin_dial_channel(), feature_request_and_dial(), local_bridge_loop(), remote_bridge_loop(), and wait_for_answer().

{
#ifdef HAVE_EPOLL
   struct epoll_event ev;
   int i = 0;

   if (chan0->epfd == -1)
      return;

   /* Iterate through the file descriptors on chan1, adding them to chan0 */
   for (i = 0; i < AST_MAX_FDS; i++) {
      if (chan1->fds[i] == -1)
         continue;
      ev.events = EPOLLIN | EPOLLPRI | EPOLLERR | EPOLLHUP;
      ev.data.ptr = chan1->epfd_data[i];
      epoll_ctl(chan0->epfd, EPOLL_CTL_ADD, chan1->fds[i], &ev);
   }

#endif
   return;
}

void ast_poll_channel_del	(	struct ast_channel *	chan0,
		struct ast_channel *	chan1
	)

Delete a channel from an optimized waitfor

Definition at line 2688 of file channel.c.

References AST_MAX_FDS, and ast_channel::fds.

Referenced by ast_generic_bridge(), feature_request_and_dial(), local_bridge_loop(), monitor_dial(), remote_bridge_loop(), and wait_for_answer().

{
#ifdef HAVE_EPOLL
   struct epoll_event ev;
   int i = 0;

   if (chan0->epfd == -1)
      return;

   for (i = 0; i < AST_MAX_FDS; i++) {
      if (chan1->fds[i] == -1)
         continue;
      epoll_ctl(chan0->epfd, EPOLL_CTL_DEL, chan1->fds[i], &ev);
   }

#endif
   return;
}

char* ast_print_group	(	char *	buf,
		int	buflen,
		ast_group_t	group
	)

print call- and pickup groups into buffer

Definition at line 8174 of file channel.c.

References first.

Referenced by _sip_show_peer(), _skinny_show_line(), func_channel_read(), function_sippeer(), misdn_cfg_get_config_string(), print_group(), read_config(), and serialize_showchan().

{
   unsigned int i;
   int first = 1;
   char num[3];

   buf[0] = '\0';
   
   if (!group) /* Return empty string if no group */
      return buf;

   for (i = 0; i <= 63; i++) {   /* Max group is 63 */
      if (group & ((ast_group_t) 1 << i)) {
            if (!first) {
            strncat(buf, ", ", buflen - strlen(buf) - 1);
         } else {
            first = 0;
         }
         snprintf(num, sizeof(num), "%u", i);
         strncat(buf, num, buflen - strlen(buf) - 1);
      }
   }
   return buf;
}

int ast_prod

(

struct ast_channel *

chan

)

Send empty audio to prime a channel driver.

Definition at line 4741 of file channel.c.

References ast_channel::_state, ast_debug, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), AST_STATE_UP, ast_write(), ast_frame_subclass::codec, ast_frame::data, LOG_WARNING, ast_frame::ptr, ast_channel::rawwriteformat, ast_frame::src, and ast_frame::subclass.

Referenced by ast_activate_generator().

{
   struct ast_frame a = { AST_FRAME_VOICE };
   char nothing[128];

   /* Send an empty audio frame to get things moving */
   if (chan->_state != AST_STATE_UP) {
      ast_debug(1, "Prodding channel '%s'\n", chan->name);
      a.subclass.codec = chan->rawwriteformat;
      a.data.ptr = nothing + AST_FRIENDLY_OFFSET;
      a.src = "ast_prod"; /* this better match check in ast_write */
      if (ast_write(chan, &a))
         ast_log(LOG_WARNING, "Prodding channel '%s' failed\n", chan->name);
   }
   return 0;
}

int ast_queue_control	(	struct ast_channel *	chan,
		enum ast_control_frame_type	control
	)

Queue a control frame with payload.

Parameters:

	chan	channel to queue frame onto
	control	type of control frame

Note:

The channel does not need to be locked before calling this function.

Return values:

	zero	on success
	non-zero	on failure

Definition at line 1601 of file channel.c.

References AST_FRAME_CONTROL, and ast_queue_frame().

Referenced by __analog_handle_event(), __analog_ss_thread(), __ast_read(), __dahdi_exception(), __oh323_update_info(), analog_call(), analog_exception(), analog_hangup(), analog_ss_thread(), ast_do_pickup(), attempt_transfer(), auto_congest(), cb_events(), cli_console_answer(), cli_console_flash(), console_answer(), console_call(), console_sendtext(), dahdi_handle_event(), dahdi_hangup(), gtalk_is_answered(), gtalk_ringing_ack(), handle_hd_hf(), handle_incoming(), handle_offhook_message(), handle_request(), handle_request_bye(), handle_request_info(), handle_request_invite(), handle_request_refer(), handle_response(), handle_response_invite(), handle_response_refer(), handle_soft_key_event_message(), handle_stimulus_message(), HandleCallIncoming(), jingle_is_answered(), jingle_ringing_ack(), masquerade_colp_transfer(), misdn_facility_ie_handler(), multicast_rtp_call(), nbs_call(), phone_call(), process_sdp(), receive_digit(), remote_hold(), send_cause2ast(), setup_rtp_connection(), skinny_call(), skinny_transfer(), skinny_unhold(), unistim_call(), and update_state().

{
   struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = control };
   return ast_queue_frame(chan, &f);
}

int ast_queue_control_data	(	struct ast_channel *	chan,
		enum ast_control_frame_type	control,
		const void *	data,
		size_t	datalen
	)

Queue a control frame with payload.

Parameters:

	chan	channel to queue frame onto
	control	type of control frame
	data	pointer to payload data to be included in frame
	datalen	number of bytes of payload data

Return values:

	0	success
	non-zero	failure

The supplied payload data is copied into the frame, so the caller's copy is not modified nor freed, and the resulting frame will retain a copy of the data even if the caller frees their local copy.

Note:

This method should be treated as a 'network transport'; in other words, your frames may be transferred across an IAX2 channel to another system, which may be a different endianness than yours. Because of this, you should ensure that either your frames will never be expected to work across systems, or that you always put your payload data into 'network byte order' before calling this function.

The channel does not need to be locked before calling this function.

Definition at line 1608 of file channel.c.

References AST_FRAME_CONTROL, and ast_queue_frame().

Referenced by __analog_handle_event(), analog_hangup(), ast_channel_queue_connected_line_update(), ast_channel_queue_redirecting_update(), change_t38_state(), dahdi_handle_event(), dahdi_hangup(), handle_request_notify(), handle_response_refer(), iax2_queue_control_data(), iax2_transfer(), interpret_t38_parameters(), local_attended_transfer(), masquerade_colp_transfer(), process_sdp(), sip_sipredirect(), and skinny_hold().

{
   struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = control, .data.ptr = (void *) data, .datalen = datalen };
   return ast_queue_frame(chan, &f);
}

int ast_queue_frame	(	struct ast_channel *	chan,
		struct ast_frame *	f
	)

Queue one or more frames to a channel's frame queue.

Parameters:

	chan	the channel to queue the frame(s) on
	f	the frame(s) to queue. Note that the frame(s) will be duplicated by this function. It is the responsibility of the caller to handle freeing the memory associated with the frame(s) being passed if necessary.

Return values:

	0	success
	non-zero	failure

Definition at line 1558 of file channel.c.

References __ast_queue_frame().

Referenced by __ast_channel_masquerade(), __ast_read(), __oh323_rtp_create(), __oh323_update_info(), action_atxfer(), agent_request(), alsa_call(), ast_channel_setwhentohangup_tv(), ast_do_masquerade(), ast_dsp_process(), ast_queue_cc_frame(), ast_queue_control(), ast_queue_control_data(), ast_queue_hangup(), ast_queue_hangup_with_cause(), ast_softhangup_nolock(), bridge_write(), cb_events(), cli_console_dial(), cli_console_sendtext(), console_dial(), console_do_answer(), console_flash(), console_sendtext(), dahdi_queue_frame(), dahdi_read(), dictate_exec(), do_immediate_setup(), gtalk_handle_dtmf(), handle_keypad_button_message(), handle_request_info(), handle_request_invite(), handle_response_invite(), iax2_queue_frame(), jingle_handle_dtmf(), local_queue_frame(), mgcp_queue_frame(), oh323_simulate_dtmf_end(), oss_call(), process_sdp(), queue_dtmf_readq(), receive_digit(), receive_message(), stream_monitor(), unistim_do_senddigit(), unistim_senddigit_end(), and wakeup_sub().

{
   return __ast_queue_frame(chan, fin, 0, NULL);
}

int ast_queue_frame_head	(	struct ast_channel *	chan,
		struct ast_frame *	f
	)

Queue one or more frames to the head of a channel's frame queue.

Parameters:

	chan	the channel to queue the frame(s) on
	f	the frame(s) to queue. Note that the frame(s) will be duplicated by this function. It is the responsibility of the caller to handle freeing the memory associated with the frame(s) being passed if necessary.

Return values:

	0	success
	non-zero	failure

Definition at line 1563 of file channel.c.

References __ast_queue_frame().

Referenced by __ast_answer(), __ast_read(), ast_autoservice_stop(), ast_safe_sleep_conditional(), and feature_request_and_dial().

{
   return __ast_queue_frame(chan, fin, 1, NULL);
}

int ast_queue_hangup

(

struct ast_channel *

chan

)

Queue a hangup frame.

Note:

The channel does not need to be locked before calling this function.

Definition at line 1569 of file channel.c.

References ast_channel::_softhangup, ast_channel_trylock, ast_channel_unlock, AST_CONTROL_HANGUP, AST_FRAME_CONTROL, ast_queue_frame(), and AST_SOFTHANGUP_DEV.

Referenced by bridge_queue_hangup(), cleanup_connection(), cli_console_hangup(), close_call(), gtalk_hangup_farend(), gtalk_is_answered(), handle_onhook_message(), handle_request_bye(), handle_soft_key_event_message(), iax2_destroy(), iax2_queue_hangup(), jingle_hangup_farend(), local_fixup(), local_hangup(), mgcp_queue_hangup(), and sip_queue_hangup_cause().

{
   struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = AST_CONTROL_HANGUP };
   /* Yeah, let's not change a lock-critical value without locking */
   if (!ast_channel_trylock(chan)) {
      chan->_softhangup |= AST_SOFTHANGUP_DEV;
      ast_channel_unlock(chan);
   }
   return ast_queue_frame(chan, &f);
}

int ast_queue_hangup_with_cause	(	struct ast_channel *	chan,
		int	cause
	)

Queue a hangup frame with hangupcause set.

Note:

The channel does not need to be locked before calling this function.

Parameters:

[in]	chan	channel to queue frame onto
[in]	cause	the hangup cause

Returns:

0 on success, -1 on error

Since:

1.6.1

Definition at line 1581 of file channel.c.

References ast_channel::_softhangup, ast_channel_trylock, ast_channel_unlock, AST_CONTROL_HANGUP, AST_FRAME_CONTROL, ast_queue_frame(), AST_SOFTHANGUP_DEV, ast_frame::data, ast_channel::hangupcause, and ast_frame::uint32.

Referenced by __analog_handle_event(), __oh323_update_info(), __sip_autodestruct(), close_call(), close_client(), console_hangup(), dahdi_handle_event(), handle_request_bye(), handle_response(), handle_response_invite(), HandleCallOutgoing(), hangup_chan(), hangup_connection(), misdn_answer(), retrans_pkt(), sip_queue_hangup_cause(), and TransferCallStep1().

{
   struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = AST_CONTROL_HANGUP };

   if (cause >= 0)
      f.data.uint32 = cause;

   /* Yeah, let's not change a lock-critical value without locking */
   if (!ast_channel_trylock(chan)) {
      chan->_softhangup |= AST_SOFTHANGUP_DEV;
      if (cause < 0)
         f.data.uint32 = chan->hangupcause;

      ast_channel_unlock(chan);
   }

   return ast_queue_frame(chan, &f);
}

int ast_raw_answer	(	struct ast_channel *	chan,
		int	cdr_answer
	)

Answer a channel.

Parameters:

	chan	channel to answer
	cdr_answer	flag to control whether any associated CDR should be marked as 'answered'

This function answers a channel and handles all necessary call setup functions.

Note:

The channel passed does not need to be locked, but is locked by the function when needed.

Unlike ast_answer(), this function will not wait for media flow to begin. The caller should be careful before sending media to the channel before incoming media arrives, as the outgoing media may be lost.

Return values:

	0	on success
	non-zero	on failure

Definition at line 2930 of file channel.c.

References ast_channel::_state, ast_channel_tech::answer, ast_cdr_answer(), AST_CEL_ANSWER, ast_cel_report_event(), ast_channel_lock, ast_channel_unlock, ast_check_hangup(), AST_FLAG_OUTGOING, AST_FLAG_ZOMBIE, ast_indicate(), ast_setstate(), AST_STATE_RING, AST_STATE_RINGING, AST_STATE_UP, ast_test_flag, ast_channel::cdr, and ast_channel::tech.

Referenced by __ast_answer(), and ast_bridge_call().

{
   int res = 0;

   ast_channel_lock(chan);

   /* You can't answer an outbound call */
   if (ast_test_flag(chan, AST_FLAG_OUTGOING)) {
      ast_channel_unlock(chan);
      return 0;
   }

   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
      ast_channel_unlock(chan);
      return -1;
   }

   ast_channel_unlock(chan);

   switch (chan->_state) {
   case AST_STATE_RINGING:
   case AST_STATE_RING:
      ast_channel_lock(chan);
      if (chan->tech->answer) {
         res = chan->tech->answer(chan);
      }
      ast_setstate(chan, AST_STATE_UP);
      if (cdr_answer) {
         ast_cdr_answer(chan->cdr);
      }
      ast_cel_report_event(chan, AST_CEL_ANSWER, NULL, NULL, NULL);
      ast_channel_unlock(chan);
      break;
   case AST_STATE_UP:
      ast_cel_report_event(chan, AST_CEL_ANSWER, NULL, NULL, NULL);
      /* Calling ast_cdr_answer when it it has previously been called
       * is essentially a no-op, so it is safe.
       */
      if (cdr_answer) {
         ast_cdr_answer(chan->cdr);
      }
      break;
   default:
      break;
   }

   ast_indicate(chan, -1);

   return res;
}

struct ast_frame* ast_read

(

struct ast_channel *

chan

)

[read]

Reads a frame.

Parameters:

chan

channel to read a frame from

Returns:

Returns a frame, or NULL on error. If it returns NULL, you best just stop reading frames and assume the channel has been disconnected.

Definition at line 4340 of file channel.c.

References __ast_read().

Referenced by __adsi_transmit_messages(), __analog_ss_thread(), __ast_answer(), __ast_play_and_record(), __ast_request_and_dial(), adsi_careful_send(), agent_ack_sleep(), agent_read(), analog_ss_thread(), ast_bridge_handle_trip(), ast_generic_bridge(), ast_recvtext(), ast_safe_sleep_conditional(), ast_tonepair(), ast_transfer(), ast_udptl_bridge(), ast_waitfordigit_full(), async_agi_read_frame(), async_wait(), autoservice_run(), background_detect_exec(), channel_spy(), conf_flush(), conf_run(), dahdi_bridge(), dial_exec_full(), dictate_exec(), disa_exec(), disable_t38(), do_waiting(), echo_exec(), eivr_comm(), feature_request_and_dial(), find_cache(), generic_fax_exec(), handle_recordfile(), handle_speechrecognize(), iax2_bridge(), ices_exec(), isAnsweringMachine(), jack_exec(), local_bridge_loop(), manage_parked_call(), measurenoise(), misdn_bridge(), monitor_dial(), mp3_exec(), NBScat_exec(), receive_dtmf_digits(), receivefax_t38_init(), record_exec(), recordthread(), remote_bridge_loop(), run_agi(), send_tone_burst(), send_waveform_to_channel(), sendfax_t38_init(), sendurl_exec(), speech_background(), transmit_audio(), transmit_t38(), wait_for_answer(), wait_for_hangup(), wait_for_winner(), waitforring_exec(), and waitstream_core().

{
   return __ast_read(chan, 0);
}

struct ast_frame* ast_read_noaudio

(

struct ast_channel *

chan

)

[read]

Reads a frame, returning AST_FRAME_NULL frame if audio.

Parameters:

chan

channel to read a frame from

Returns:

Returns a frame, or NULL on error. If it returns NULL, you best just stop reading frames and assume the channel has been disconnected.

Note:

Audio is replaced with AST_FRAME_NULL to avoid transcode when the resulting audio is not necessary.

Definition at line 4345 of file channel.c.

References __ast_read().

Referenced by ast_bridge_handle_trip(), and conf_run().

{
   return __ast_read(chan, 1);
}

int ast_readstring	(	struct ast_channel *	c,
		char *	s,
		int	len,
		int	timeout,
		int	rtimeout,
		char *	enders
	)

Reads multiple digits.

Parameters:

	c	channel to read from
	s	string to read in to. Must be at least the size of your length
	len	how many digits to read (maximum)
	timeout	how long to timeout between digits
	rtimeout	timeout to wait on the first digit
	enders	digits to end the string

Read in a digit string "s", max length "len", maximum timeout between digits "timeout" (-1 for none), terminated by anything in "enders". Give them rtimeout for the first digit.

Returns:

Returns 0 on normal return, or 1 on a timeout. In the case of a timeout, any digits that were read before the timeout will still be available in s. RETURNS 2 in full version when ctrlfd is available, NOT 1

Definition at line 5794 of file channel.c.

References ast_readstring_full().

Referenced by __adsi_transmit_messages(), adsi_begin_download(), adsi_get_cpeinfo(), adsi_load_session(), ast_app_getdata(), dialout(), do_directory(), forward_message(), privacy_exec(), vm_authenticate(), vm_newuser(), and vm_options().

{
   return ast_readstring_full(c, s, len, timeout, ftimeout, enders, -1, -1);
}

int ast_readstring_full	(	struct ast_channel *	c,
		char *	s,
		int	len,
		int	timeout,
		int	rtimeout,
		char *	enders,
		int	audiofd,
		int	ctrlfd
	)

Definition at line 5799 of file channel.c.

References ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), ast_check_hangup(), AST_DIGIT_ANY, AST_FLAG_ZOMBIE, AST_GETDATA_COMPLETE, AST_GETDATA_EMPTY_END_TERMINATED, AST_GETDATA_FAILED, AST_GETDATA_INTERRUPTED, AST_GETDATA_TIMEOUT, ast_opt_transmit_silence, ast_stopstream(), ast_test_flag, ast_waitfordigit_full(), ast_waitstream_full(), and ast_channel::stream.

Referenced by ast_app_getdata_full(), and ast_readstring().

{
   int pos = 0;   /* index in the buffer where we accumulate digits */
   int to = ftimeout;

   struct ast_silence_generator *silgen = NULL;

   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(c, AST_FLAG_ZOMBIE) || ast_check_hangup(c))
      return -1;
   if (!len)
      return -1;
   for (;;) {
      int d;
      if (c->stream) {
         d = ast_waitstream_full(c, AST_DIGIT_ANY, audiofd, ctrlfd);
         ast_stopstream(c);
         if (!silgen && ast_opt_transmit_silence)
            silgen = ast_channel_start_silence_generator(c);
         usleep(1000);
         if (!d)
            d = ast_waitfordigit_full(c, to, audiofd, ctrlfd);
      } else {
         if (!silgen && ast_opt_transmit_silence)
            silgen = ast_channel_start_silence_generator(c);
         d = ast_waitfordigit_full(c, to, audiofd, ctrlfd);
      }
      if (d < 0) {
         ast_channel_stop_silence_generator(c, silgen);
         return AST_GETDATA_FAILED;
      }
      if (d == 0) {
         s[pos] = '\0';
         ast_channel_stop_silence_generator(c, silgen);
         return AST_GETDATA_TIMEOUT;
      }
      if (d == 1) {
         s[pos] = '\0';
         ast_channel_stop_silence_generator(c, silgen);
         return AST_GETDATA_INTERRUPTED;
      }
      if (strchr(enders, d) && (pos == 0)) {
         s[pos] = '\0';
         ast_channel_stop_silence_generator(c, silgen);
         return AST_GETDATA_EMPTY_END_TERMINATED;
      }
      if (!strchr(enders, d)) {
         s[pos++] = d;
      }
      if (strchr(enders, d) || (pos >= len)) {
         s[pos] = '\0';
         ast_channel_stop_silence_generator(c, silgen);
         return AST_GETDATA_COMPLETE;
      }
      to = timeout;
   }
   /* Never reached */
   return 0;
}

int ast_recvchar	(	struct ast_channel *	chan,
		int	timeout
	)

Receives a text character from a channel.

Parameters:

	chan	channel to act upon
	timeout	timeout in milliseconds (0 for infinite wait)

Read a char of text from a channel

Returns:

0 on success, -1 on failure

Definition at line 4599 of file channel.c.

References ast_free, and ast_recvtext().

Referenced by handle_recvchar().

{
   int c;
   char *buf = ast_recvtext(chan, timeout);
   if (buf == NULL)
      return -1;  /* error or timeout */
   c = *(unsigned char *)buf;
   ast_free(buf);
   return c;
}

char* ast_recvtext	(	struct ast_channel *	chan,
		int	timeout
	)

Receives a text string from a channel Read a string of text from a channel.

Parameters:

	chan	channel to act upon
	timeout	timeout in milliseconds (0 for infinite wait)

Returns:

the received text, or NULL to signify failure.

Definition at line 4610 of file channel.c.

References ast_check_hangup(), AST_CONTROL_HANGUP, AST_FRAME_CONTROL, AST_FRAME_TEXT, ast_frfree, ast_read(), ast_remaining_ms(), ast_strndup, ast_tvnow(), ast_waitfor(), ast_frame::data, ast_frame::datalen, ast_frame::frametype, ast_frame_subclass::integer, ast_frame::ptr, and ast_frame::subclass.

Referenced by ast_recvchar(), and handle_recvtext().

{
   int res;
   char *buf = NULL;
   struct timeval start = ast_tvnow();
   int ms;

   while ((ms = ast_remaining_ms(start, timeout))) {
      struct ast_frame *f;

      if (ast_check_hangup(chan)) {
         break;
      }
      res = ast_waitfor(chan, ms);
      if (res <= 0)  {/* timeout or error */
         break;
      }
      f = ast_read(chan);
      if (f == NULL) {
         break; /* no frame */
      }
      if (f->frametype == AST_FRAME_CONTROL && f->subclass.integer == AST_CONTROL_HANGUP) {
         ast_frfree(f);
         break;
      } else if (f->frametype == AST_FRAME_TEXT) {    /* what we want */
         buf = ast_strndup((char *) f->data.ptr, f->datalen);  /* dup and break */
         ast_frfree(f);
         break;
      }
      ast_frfree(f);
   }
   return buf;
}

int ast_redirecting_build_data	(	unsigned char *	data,
		size_t	datalen,
		const struct ast_party_redirecting *	redirecting,
		const struct ast_set_party_redirecting *	update
	)

Build the redirecting id data frame.

Since:

1.8

Parameters:

	data	Buffer to fill with the frame data
	datalen	Size of the buffer to fill
	redirecting	Redirecting id information
	update	What redirecting information to build. NULL if all.

Return values:

	-1	if error
	Amount	of data buffer used

Definition at line 9104 of file channel.c.

References ast_log(), AST_REDIRECTING_COUNT, AST_REDIRECTING_FROM_ID_PRESENTATION, AST_REDIRECTING_FROM_NAME, AST_REDIRECTING_FROM_NAME_CHAR_SET, AST_REDIRECTING_FROM_NAME_PRESENTATION, AST_REDIRECTING_FROM_NAME_VALID, AST_REDIRECTING_FROM_NUMBER, AST_REDIRECTING_FROM_NUMBER_PLAN, AST_REDIRECTING_FROM_NUMBER_PRESENTATION, AST_REDIRECTING_FROM_NUMBER_VALID, AST_REDIRECTING_FROM_SUBADDRESS, AST_REDIRECTING_FROM_SUBADDRESS_ODD_EVEN, AST_REDIRECTING_FROM_SUBADDRESS_TYPE, AST_REDIRECTING_FROM_SUBADDRESS_VALID, AST_REDIRECTING_FROM_TAG, AST_REDIRECTING_TO_ID_PRESENTATION, AST_REDIRECTING_TO_NAME, AST_REDIRECTING_TO_NAME_CHAR_SET, AST_REDIRECTING_TO_NAME_PRESENTATION, AST_REDIRECTING_TO_NAME_VALID, AST_REDIRECTING_TO_NUMBER, AST_REDIRECTING_TO_NUMBER_PLAN, AST_REDIRECTING_TO_NUMBER_PRESENTATION, AST_REDIRECTING_TO_NUMBER_VALID, AST_REDIRECTING_TO_SUBADDRESS, AST_REDIRECTING_TO_SUBADDRESS_ODD_EVEN, AST_REDIRECTING_TO_SUBADDRESS_TYPE, AST_REDIRECTING_TO_SUBADDRESS_VALID, AST_REDIRECTING_TO_TAG, AST_REDIRECTING_VERSION, ast_party_redirecting::count, ast_set_party_redirecting::from, ast_party_redirecting::from, LOG_WARNING, ast_party_id_ies::name, party_id_build_data(), ast_party_redirecting::reason, ast_party_name_ies::str, ast_set_party_redirecting::to, ast_party_redirecting::to, and value.

Referenced by ast_channel_queue_redirecting_update(), ast_channel_update_redirecting(), and local_indicate().

{
   int32_t value;
   size_t pos = 0;
   int res;

   static const struct ast_party_id_ies from_ies = {
      .name.str = AST_REDIRECTING_FROM_NAME,
      .name.char_set = AST_REDIRECTING_FROM_NAME_CHAR_SET,
      .name.presentation = AST_REDIRECTING_FROM_NAME_PRESENTATION,
      .name.valid = AST_REDIRECTING_FROM_NAME_VALID,

      .number.str = AST_REDIRECTING_FROM_NUMBER,
      .number.plan = AST_REDIRECTING_FROM_NUMBER_PLAN,
      .number.presentation = AST_REDIRECTING_FROM_NUMBER_PRESENTATION,
      .number.valid = AST_REDIRECTING_FROM_NUMBER_VALID,

      .subaddress.str = AST_REDIRECTING_FROM_SUBADDRESS,
      .subaddress.type = AST_REDIRECTING_FROM_SUBADDRESS_TYPE,
      .subaddress.odd_even_indicator = AST_REDIRECTING_FROM_SUBADDRESS_ODD_EVEN,
      .subaddress.valid = AST_REDIRECTING_FROM_SUBADDRESS_VALID,

      .tag = AST_REDIRECTING_FROM_TAG,
      .combined_presentation = AST_REDIRECTING_FROM_ID_PRESENTATION,
   };
   static const struct ast_party_id_ies to_ies = {
      .name.str = AST_REDIRECTING_TO_NAME,
      .name.char_set = AST_REDIRECTING_TO_NAME_CHAR_SET,
      .name.presentation = AST_REDIRECTING_TO_NAME_PRESENTATION,
      .name.valid = AST_REDIRECTING_TO_NAME_VALID,

      .number.str = AST_REDIRECTING_TO_NUMBER,
      .number.plan = AST_REDIRECTING_TO_NUMBER_PLAN,
      .number.presentation = AST_REDIRECTING_TO_NUMBER_PRESENTATION,
      .number.valid = AST_REDIRECTING_TO_NUMBER_VALID,

      .subaddress.str = AST_REDIRECTING_TO_SUBADDRESS,
      .subaddress.type = AST_REDIRECTING_TO_SUBADDRESS_TYPE,
      .subaddress.odd_even_indicator = AST_REDIRECTING_TO_SUBADDRESS_ODD_EVEN,
      .subaddress.valid = AST_REDIRECTING_TO_SUBADDRESS_VALID,

      .tag = AST_REDIRECTING_TO_TAG,
      .combined_presentation = AST_REDIRECTING_TO_ID_PRESENTATION,
   };

   /* Redirecting frame version */
   if (datalen < pos + (sizeof(data[0]) * 2) + 1) {
      ast_log(LOG_WARNING, "No space left for redirecting frame version\n");
      return -1;
   }
   data[pos++] = AST_REDIRECTING_VERSION;
   data[pos++] = 1;
   data[pos++] = 2;/* Version 1 did not have a version ie */

   res = party_id_build_data(data + pos, datalen - pos, &redirecting->from,
      "redirecting-from", &from_ies, update ? &update->from : NULL);
   if (res < 0) {
      return -1;
   }
   pos += res;

   res = party_id_build_data(data + pos, datalen - pos, &redirecting->to,
      "redirecting-to", &to_ies, update ? &update->to : NULL);
   if (res < 0) {
      return -1;
   }
   pos += res;

   /* Redirecting reason */
   if (datalen < pos + (sizeof(data[0]) * 2) + sizeof(value)) {
      ast_log(LOG_WARNING, "No space left for redirecting reason\n");
      return -1;
   }
   data[pos++] = AST_REDIRECTING_REASON;
   data[pos++] = sizeof(value);
   value = htonl(redirecting->reason);
   memcpy(data + pos, &value, sizeof(value));
   pos += sizeof(value);

   /* Redirecting count */
   if (datalen < pos + (sizeof(data[0]) * 2) + sizeof(value)) {
      ast_log(LOG_WARNING, "No space left for redirecting count\n");
      return -1;
   }
   data[pos++] = AST_REDIRECTING_COUNT;
   data[pos++] = sizeof(value);
   value = htonl(redirecting->count);
   memcpy(data + pos, &value, sizeof(value));
   pos += sizeof(value);

   return pos;
}

int ast_redirecting_parse_data	(	const unsigned char *	data,
		size_t	datalen,
		struct ast_party_redirecting *	redirecting
	)

Parse redirecting indication frame data.

Since:

1.8

Parameters:

	data	Buffer with the frame data to parse
	datalen	Size of the buffer
	redirecting	Extracted redirecting id information

Return values:

	0	on success.
	-1	on error.

Note:

The filled in id structure needs to be initialized by ast_party_redirecting_set_init() before calling.

The filled in id structure needs to be destroyed by ast_party_redirecting_free() when it is no longer needed.

Definition at line 9197 of file channel.c.

References ast_free, ast_log(), ast_malloc, AST_PARTY_CHAR_SET_ISO8859_1, AST_REDIRECTING_COUNT, AST_REDIRECTING_FROM_ID_PRESENTATION, AST_REDIRECTING_FROM_NAME, AST_REDIRECTING_FROM_NAME_CHAR_SET, AST_REDIRECTING_FROM_NAME_PRESENTATION, AST_REDIRECTING_FROM_NAME_VALID, AST_REDIRECTING_FROM_NUMBER, AST_REDIRECTING_FROM_NUMBER_PLAN, AST_REDIRECTING_FROM_NUMBER_PRESENTATION, AST_REDIRECTING_FROM_NUMBER_VALID, AST_REDIRECTING_FROM_SUBADDRESS, AST_REDIRECTING_FROM_SUBADDRESS_ODD_EVEN, AST_REDIRECTING_FROM_SUBADDRESS_TYPE, AST_REDIRECTING_FROM_SUBADDRESS_VALID, AST_REDIRECTING_FROM_TAG, AST_REDIRECTING_TO_ID_PRESENTATION, AST_REDIRECTING_TO_NAME, AST_REDIRECTING_TO_NAME_CHAR_SET, AST_REDIRECTING_TO_NAME_PRESENTATION, AST_REDIRECTING_TO_NAME_VALID, AST_REDIRECTING_TO_NUMBER, AST_REDIRECTING_TO_NUMBER_PLAN, AST_REDIRECTING_TO_NUMBER_PRESENTATION, AST_REDIRECTING_TO_NUMBER_VALID, AST_REDIRECTING_TO_SUBADDRESS, AST_REDIRECTING_TO_SUBADDRESS_ODD_EVEN, AST_REDIRECTING_TO_SUBADDRESS_TYPE, AST_REDIRECTING_TO_SUBADDRESS_VALID, AST_REDIRECTING_TO_TAG, AST_REDIRECTING_VERSION, ast_party_name::char_set, ast_party_redirecting::count, ast_party_redirecting::from, LOG_DEBUG, LOG_WARNING, ast_party_id::name, ast_party_id::number, ast_party_subaddress::odd_even_indicator, ast_party_number::plan, ast_party_number::presentation, ast_party_name::presentation, ast_party_redirecting::reason, ast_party_subaddress::str, ast_party_number::str, ast_party_name::str, ast_party_id::subaddress, ast_party_id::tag, ast_party_redirecting::to, ast_party_subaddress::type, ast_party_subaddress::valid, ast_party_number::valid, ast_party_name::valid, and value.

Referenced by ast_channel_redirecting_macro(), and ast_indicate_data().

{
   size_t pos;
   unsigned char ie_len;
   unsigned char ie_id;
   int32_t value;
   int frame_version = 1;
   int from_combined_presentation = 0;
   int got_from_combined_presentation = 0;/* TRUE if got a combined name and number presentation value. */
   int to_combined_presentation = 0;
   int got_to_combined_presentation = 0;/* TRUE if got a combined name and number presentation value. */

   for (pos = 0; pos < datalen; pos += ie_len) {
      if (datalen < pos + sizeof(ie_id) + sizeof(ie_len)) {
         ast_log(LOG_WARNING, "Invalid redirecting update\n");
         return -1;
      }
      ie_id = data[pos++];
      ie_len = data[pos++];
      if (datalen < pos + ie_len) {
         ast_log(LOG_WARNING, "Invalid redirecting update\n");
         return -1;
      }

      switch (ie_id) {
/* Redirecting frame version */
      case AST_REDIRECTING_VERSION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting frame version (%u)\n",
               (unsigned) ie_len);
            break;
         }
         frame_version = data[pos];
         break;
/* Redirecting-from party id name */
      case AST_REDIRECTING_FROM_NAME:
         ast_free(redirecting->from.name.str);
         redirecting->from.name.str = ast_malloc(ie_len + 1);
         if (redirecting->from.name.str) {
            memcpy(redirecting->from.name.str, data + pos, ie_len);
            redirecting->from.name.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_FROM_NAME_CHAR_SET:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from name char set (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.name.char_set = data[pos];
         break;
      case AST_REDIRECTING_FROM_NAME_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from name presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.name.presentation = data[pos];
         break;
      case AST_REDIRECTING_FROM_NAME_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from name valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.name.valid = data[pos];
         break;
/* Redirecting-from party id number */
      case AST_REDIRECTING_FROM_NUMBER:
         ast_free(redirecting->from.number.str);
         redirecting->from.number.str = ast_malloc(ie_len + 1);
         if (redirecting->from.number.str) {
            memcpy(redirecting->from.number.str, data + pos, ie_len);
            redirecting->from.number.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_FROM_NUMBER_PLAN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from numbering plan (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.number.plan = data[pos];
         break;
      case AST_REDIRECTING_FROM_NUMBER_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from number presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.number.presentation = data[pos];
         break;
      case AST_REDIRECTING_FROM_NUMBER_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from number valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.number.valid = data[pos];
         break;
/* Redirecting-from party id combined presentation */
      case AST_REDIRECTING_FROM_ID_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from combined presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         from_combined_presentation = data[pos];
         got_from_combined_presentation = 1;
         break;
/* Redirecting-from party id subaddress */
      case AST_REDIRECTING_FROM_SUBADDRESS:
         ast_free(redirecting->from.subaddress.str);
         redirecting->from.subaddress.str = ast_malloc(ie_len + 1);
         if (redirecting->from.subaddress.str) {
            memcpy(redirecting->from.subaddress.str, data + pos, ie_len);
            redirecting->from.subaddress.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_FROM_SUBADDRESS_TYPE:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from type of subaddress (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.subaddress.type = data[pos];
         break;
      case AST_REDIRECTING_FROM_SUBADDRESS_ODD_EVEN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING,
               "Invalid redirecting-from subaddress odd-even indicator (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.subaddress.odd_even_indicator = data[pos];
         break;
      case AST_REDIRECTING_FROM_SUBADDRESS_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-from subaddress valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->from.subaddress.valid = data[pos];
         break;
/* Redirecting-from party id tag */
      case AST_REDIRECTING_FROM_TAG:
         ast_free(redirecting->from.tag);
         redirecting->from.tag = ast_malloc(ie_len + 1);
         if (redirecting->from.tag) {
            memcpy(redirecting->from.tag, data + pos, ie_len);
            redirecting->from.tag[ie_len] = 0;
         }
         break;
/* Redirecting-to party id name */
      case AST_REDIRECTING_TO_NAME:
         ast_free(redirecting->to.name.str);
         redirecting->to.name.str = ast_malloc(ie_len + 1);
         if (redirecting->to.name.str) {
            memcpy(redirecting->to.name.str, data + pos, ie_len);
            redirecting->to.name.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_TO_NAME_CHAR_SET:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to name char set (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.name.char_set = data[pos];
         break;
      case AST_REDIRECTING_TO_NAME_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to name presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.name.presentation = data[pos];
         break;
      case AST_REDIRECTING_TO_NAME_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to name valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.name.valid = data[pos];
         break;
/* Redirecting-to party id number */
      case AST_REDIRECTING_TO_NUMBER:
         ast_free(redirecting->to.number.str);
         redirecting->to.number.str = ast_malloc(ie_len + 1);
         if (redirecting->to.number.str) {
            memcpy(redirecting->to.number.str, data + pos, ie_len);
            redirecting->to.number.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_TO_NUMBER_PLAN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to numbering plan (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.number.plan = data[pos];
         break;
      case AST_REDIRECTING_TO_NUMBER_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to number presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.number.presentation = data[pos];
         break;
      case AST_REDIRECTING_TO_NUMBER_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to number valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.number.valid = data[pos];
         break;
/* Redirecting-to party id combined presentation */
      case AST_REDIRECTING_TO_ID_PRESENTATION:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to combined presentation (%u)\n",
               (unsigned) ie_len);
            break;
         }
         to_combined_presentation = data[pos];
         got_to_combined_presentation = 1;
         break;
/* Redirecting-to party id subaddress */
      case AST_REDIRECTING_TO_SUBADDRESS:
         ast_free(redirecting->to.subaddress.str);
         redirecting->to.subaddress.str = ast_malloc(ie_len + 1);
         if (redirecting->to.subaddress.str) {
            memcpy(redirecting->to.subaddress.str, data + pos, ie_len);
            redirecting->to.subaddress.str[ie_len] = 0;
         }
         break;
      case AST_REDIRECTING_TO_SUBADDRESS_TYPE:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to type of subaddress (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.subaddress.type = data[pos];
         break;
      case AST_REDIRECTING_TO_SUBADDRESS_ODD_EVEN:
         if (ie_len != 1) {
            ast_log(LOG_WARNING,
               "Invalid redirecting-to subaddress odd-even indicator (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.subaddress.odd_even_indicator = data[pos];
         break;
      case AST_REDIRECTING_TO_SUBADDRESS_VALID:
         if (ie_len != 1) {
            ast_log(LOG_WARNING, "Invalid redirecting-to subaddress valid (%u)\n",
               (unsigned) ie_len);
            break;
         }
         redirecting->to.subaddress.valid = data[pos];
         break;
/* Redirecting-to party id tag */
      case AST_REDIRECTING_TO_TAG:
         ast_free(redirecting->to.tag);
         redirecting->to.tag = ast_malloc(ie_len + 1);
         if (redirecting->to.tag) {
            memcpy(redirecting->to.tag, data + pos, ie_len);
            redirecting->to.tag[ie_len] = 0;
         }
         break;
/* Redirecting reason */
      case AST_REDIRECTING_REASON:
         if (ie_len != sizeof(value)) {
            ast_log(LOG_WARNING, "Invalid redirecting reason (%u)\n",
               (unsigned) ie_len);
            break;
         }
         memcpy(&value, data + pos, sizeof(value));
         redirecting->reason = ntohl(value);
         break;
/* Redirecting count */
      case AST_REDIRECTING_COUNT:
         if (ie_len != sizeof(value)) {
            ast_log(LOG_WARNING, "Invalid redirecting count (%u)\n",
               (unsigned) ie_len);
            break;
         }
         memcpy(&value, data + pos, sizeof(value));
         redirecting->count = ntohl(value);
         break;
/* Redirecting unknown element */
      default:
         ast_log(LOG_DEBUG, "Unknown redirecting element: %u (%u)\n",
            (unsigned) ie_id, (unsigned) ie_len);
         break;
      }
   }

   switch (frame_version) {
   case 1:
      /*
       * The other end is an earlier version that we need to adjust
       * for compatibility.
       */
      redirecting->from.name.valid = 1;
      redirecting->from.name.char_set = AST_PARTY_CHAR_SET_ISO8859_1;
      redirecting->from.number.valid = 1;
      if (got_from_combined_presentation) {
         redirecting->from.name.presentation = from_combined_presentation;
         redirecting->from.number.presentation = from_combined_presentation;
      }

      redirecting->to.name.valid = 1;
      redirecting->to.name.char_set = AST_PARTY_CHAR_SET_ISO8859_1;
      redirecting->to.number.valid = 1;
      if (got_to_combined_presentation) {
         redirecting->to.name.presentation = to_combined_presentation;
         redirecting->to.number.presentation = to_combined_presentation;
      }
      break;
   case 2:
      /* The other end is at the same level as we are. */
      break;
   default:
      /*
       * The other end is newer than we are.
       * We need to assume that they are compatible with us.
       */
      ast_log(LOG_DEBUG, "Redirecting frame has newer version: %u\n",
         (unsigned) frame_version);
      break;
   }

   return 0;
}

struct ast_channel* ast_request	(	const char *	type,
		format_t	format,
		const struct ast_channel *	requestor,
		void *	data,
		int *	status
	)			[read]

Requests a channel.

Parameters:

	type	type of channel to request
	format	requested channel format (codec)
	requestor	channel asking for data
	data	data to pass to the channel requester (Should be treated as const char *)
	status	status

Request a channel of a given type, with data as optional information used by the low level module

Return values:

	NULL	failure
	non-NULL	channel on success

Definition at line 5652 of file channel.c.

References AST_CAUSE_BEARERCAPABILITY_NOTAVAIL, AST_CAUSE_NOSUCHDRIVER, AST_CAUSE_NOTDEFINED, ast_channel_release(), AST_FORMAT_AUDIO_MASK, AST_FORMAT_TEXT_MASK, AST_FORMAT_VIDEO_MASK, ast_getformatname_multiple(), ast_log(), AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_translator_best_choice(), ast_channel_tech::capabilities, capabilities, LOG_WARNING, ast_channel_tech::requester, set_security_requirements(), chanlist::tech, and ast_channel_tech::type.

Referenced by __ast_request_and_dial(), ast_call_forward(), begin_dial_channel(), build_conf(), chanavail_exec(), conf_run(), dial_exec_full(), dial_transfer(), do_forward(), feature_request_and_dial(), findmeexec(), meetme_menu_admin_extended(), play_sound_file(), ring_entry(), and wait_for_answer().

{
   struct chanlist *chan;
   struct ast_channel *c;
   format_t capabilities;
   format_t fmt;
   int res;
   int foo;
   format_t videoformat = format & AST_FORMAT_VIDEO_MASK;
   format_t textformat = format & AST_FORMAT_TEXT_MASK;

   if (!cause)
      cause = &foo;
   *cause = AST_CAUSE_NOTDEFINED;

   if (AST_RWLIST_RDLOCK(&backends)) {
      ast_log(LOG_WARNING, "Unable to lock technology backend list\n");
      return NULL;
   }

   AST_RWLIST_TRAVERSE(&backends, chan, list) {
      if (strcasecmp(type, chan->tech->type))
         continue;

      capabilities = chan->tech->capabilities;
      fmt = format & AST_FORMAT_AUDIO_MASK;
      if (fmt) {
         /* We have audio - is it possible to connect the various calls to each other? 
            (Avoid this check for calls without audio, like text+video calls)
         */
         res = ast_translator_best_choice(&fmt, &capabilities);
         if (res < 0) {
            char tmp1[256], tmp2[256];
            ast_log(LOG_WARNING, "No translator path exists for channel type %s (native %s) to %s\n", type,
               ast_getformatname_multiple(tmp1, sizeof(tmp1), chan->tech->capabilities),
               ast_getformatname_multiple(tmp2, sizeof(tmp2), format));
            *cause = AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
            AST_RWLIST_UNLOCK(&backends);
            return NULL;
         }
      }
      AST_RWLIST_UNLOCK(&backends);
      if (!chan->tech->requester)
         return NULL;

      if (!(c = chan->tech->requester(type, capabilities | videoformat | textformat, requestor, data, cause)))
         return NULL;

      if (set_security_requirements(requestor, c)) {
         ast_log(LOG_WARNING, "Setting security requirements failed\n");
         c = ast_channel_release(c);
         *cause = AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
         return NULL;
      }

      /* no need to generate a Newchannel event here; it is done in the channel_alloc call */
      return c;
   }

   ast_log(LOG_WARNING, "No channel type registered for '%s'\n", type);
   *cause = AST_CAUSE_NOSUCHDRIVER;
   AST_RWLIST_UNLOCK(&backends);

   return NULL;
}

struct ast_channel* ast_request_and_dial	(	const char *	type,
		format_t	format,
		const struct ast_channel *	requestor,
		void *	data,
		int	timeout,
		int *	reason,
		const char *	cid_num,
		const char *	cid_name
	)			[read]

Request a channel of a given type, with data as optional information used by the low level module and attempt to place a call on it.

Parameters:

	type	type of channel to request
	format	requested channel format
	requestor	channel asking for data
	data	data to pass to the channel requester
	timeout	maximum amount of time to wait for an answer
	reason	why unsuccessful (if unsuccessful)
	cid_num	Caller-ID Number
	cid_name	Caller-ID Name (ascii)

Returns:

Returns an ast_channel on success or no answer, NULL on failure. Check the value of chan->_state to know if the call was answered or not.

Definition at line 5607 of file channel.c.

References __ast_request_and_dial().

Referenced by ast_pbx_outgoing_exten(), and generic_recall().

{
   return __ast_request_and_dial(type, format, requestor, data, timeout, outstate, cidnum, cidname, NULL);
}

int ast_safe_sleep	(	struct ast_channel *	chan,
		int	ms
	)

Wait for a specified amount of time, looking for hangups.

Parameters:

	chan	channel to wait for
	ms	length of time in milliseconds to sleep. This should never be less than zero.

Waits for a specified amount of time, servicing the channel as required.

Returns:

returns -1 on hangup, otherwise 0.

Definition at line 1916 of file channel.c.

References ast_safe_sleep_conditional().

Referenced by __analog_ss_thread(), adsi_transmit_message_full(), alarmreceiver_exec(), analog_ss_thread(), ast_dtmf_stream(), ast_senddigit(), builtin_atxfer(), builtin_parkcall(), conf_run(), dial_trunk(), dictate_exec(), disa_exec(), flash_exec(), handle_callforward_button(), login_exec(), mgcp_ss(), milliwatt_exec(), misdn_check_l2l1(), old_milliwatt_exec(), park_call_exec(), pbx_builtin_wait(), play_moh_exec(), playtone(), privacy_exec(), receive_ademco_contact_id(), skinny_ss(), testclient_exec(), testserver_exec(), try_calling(), wait_for_hangup(), wait_moh_exec(), waituntil_exec(), and zapateller_exec().

{
   return ast_safe_sleep_conditional(chan, ms, NULL, NULL);
}

int ast_safe_sleep_conditional	(	struct ast_channel *	chan,
		int	timeout_ms,
		int(*)(void *)	cond,
		void *	data
	)

Wait for a specified amount of time, looking for hangups and a condition argument.

Parameters:

	chan	channel to wait for
	ms	length of time in milliseconds to sleep.
	cond	a function pointer for testing continue condition
	data	argument to be passed to the condition test function

Returns:

returns -1 on hangup, otherwise 0.

Waits for a specified amount of time, servicing the channel as required. If cond returns 0, this function returns.

Definition at line 1845 of file channel.c.

References ast_channel_lock, ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), ast_channel_unlock, ast_frfree, ast_frisolate(), ast_is_deferrable_frame(), AST_LIST_HEAD_INIT_NOLOCK, AST_LIST_HEAD_NOLOCK, AST_LIST_INSERT_HEAD, AST_LIST_REMOVE_HEAD, ast_opt_transmit_silence, ast_queue_frame_head(), ast_read(), ast_remaining_ms(), ast_tvnow(), ast_waitfor(), cond, and ast_channel::generatordata.

Referenced by ast_safe_sleep(), and login_exec().

{
   struct ast_frame *f;
   struct ast_silence_generator *silgen = NULL;
   int res = 0;
   struct timeval start;
   int ms;
   AST_LIST_HEAD_NOLOCK(, ast_frame) deferred_frames;

   AST_LIST_HEAD_INIT_NOLOCK(&deferred_frames);

   /* If no other generator is present, start silencegen while waiting */
   if (ast_opt_transmit_silence && !chan->generatordata) {
      silgen = ast_channel_start_silence_generator(chan);
   }

   start = ast_tvnow();
   while ((ms = ast_remaining_ms(start, timeout_ms))) {
      struct ast_frame *dup_f = NULL;

      if (cond && ((*cond)(data) == 0)) {
         break;
      }
      ms = ast_waitfor(chan, ms);
      if (ms < 0) {
         res = -1;
         break;
      }
      if (ms > 0) {
         f = ast_read(chan);
         if (!f) {
            res = -1;
            break;
         }

         if (!ast_is_deferrable_frame(f)) {
            ast_frfree(f);
            continue;
         }
         
         if ((dup_f = ast_frisolate(f))) {
            if (dup_f != f) {
               ast_frfree(f);
            }
            AST_LIST_INSERT_HEAD(&deferred_frames, dup_f, frame_list);
         }
      }
   }

   /* stop silgen if present */
   if (silgen) {
      ast_channel_stop_silence_generator(chan, silgen);
   }

   /* We need to free all the deferred frames, but we only need to
    * queue the deferred frames if there was no error and no
    * hangup was received
    */
   ast_channel_lock(chan);
   while ((f = AST_LIST_REMOVE_HEAD(&deferred_frames, frame_list))) {
      if (!res) {
         ast_queue_frame_head(chan, f);
      }
      ast_frfree(f);
   }
   ast_channel_unlock(chan);

   return res;
}

int ast_senddigit	(	struct ast_channel *	chan,
		char	digit,
		unsigned int	duration
	)

Send a DTMF digit to a channel.

Parameters:

	chan	channel to act upon
	digit	the DTMF digit to send, encoded in ASCII
	duration	the duration of the digit ending in ms

Returns:

0 on success, -1 on failure

Definition at line 4731 of file channel.c.

References AST_DEFAULT_EMULATE_DTMF_DURATION, ast_safe_sleep(), ast_senddigit_begin(), ast_senddigit_end(), ast_channel_tech::send_digit_begin, and ast_channel::tech.

Referenced by ast_dtmf_stream(), dial_exec_full(), and manager_play_dtmf().

{
   if (chan->tech->send_digit_begin) {
      ast_senddigit_begin(chan, digit);
      ast_safe_sleep(chan, (duration >= AST_DEFAULT_EMULATE_DTMF_DURATION ? duration : AST_DEFAULT_EMULATE_DTMF_DURATION));
   }
   
   return ast_senddigit_end(chan, digit, (duration >= AST_DEFAULT_EMULATE_DTMF_DURATION ? duration : AST_DEFAULT_EMULATE_DTMF_DURATION));
}

int ast_senddigit_begin	(	struct ast_channel *	chan,
		char	digit
	)

Send a DTMF digit to a channel.

Parameters:

	chan	channel to act upon
	digit	the DTMF digit to send, encoded in ASCII

Returns:

0 on success, -1 on failure

Definition at line 4662 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_debug, ast_playtones_start(), ast_tvnow(), ast_channel_tech::send_digit_begin, ast_channel::sending_dtmf_digit, ast_channel::sending_dtmf_tv, and ast_channel::tech.

Referenced by agent_digit_begin(), ast_senddigit(), and ast_write().

{
   /* Device does not support DTMF tones, lets fake
    * it by doing our own generation. */
   static const char * const dtmf_tones[] = {
      "941+1336", /* 0 */
      "697+1209", /* 1 */
      "697+1336", /* 2 */
      "697+1477", /* 3 */
      "770+1209", /* 4 */
      "770+1336", /* 5 */
      "770+1477", /* 6 */
      "852+1209", /* 7 */
      "852+1336", /* 8 */
      "852+1477", /* 9 */
      "697+1633", /* A */
      "770+1633", /* B */
      "852+1633", /* C */
      "941+1633", /* D */
      "941+1209", /* * */
      "941+1477"  /* # */
   };

   if (!chan->tech->send_digit_begin)
      return 0;

   ast_channel_lock(chan);
   chan->sending_dtmf_digit = digit;
   chan->sending_dtmf_tv = ast_tvnow();
   ast_channel_unlock(chan);

   if (!chan->tech->send_digit_begin(chan, digit))
      return 0;

   if (digit >= '0' && digit <='9')
      ast_playtones_start(chan, 0, dtmf_tones[digit-'0'], 0);
   else if (digit >= 'A' && digit <= 'D')
      ast_playtones_start(chan, 0, dtmf_tones[digit-'A'+10], 0);
   else if (digit == '*')
      ast_playtones_start(chan, 0, dtmf_tones[14], 0);
   else if (digit == '#')
      ast_playtones_start(chan, 0, dtmf_tones[15], 0);
   else {
      /* not handled */
      ast_debug(1, "Unable to generate DTMF tone '%c' for '%s'\n", digit, chan->name);
   }

   return 0;
}

int ast_senddigit_end	(	struct ast_channel *	chan,
		char	digit,
		unsigned int	duration
	)

Send a DTMF digit to a channel.

Parameters:

	chan	channel to act upon
	digit	the DTMF digit to send, encoded in ASCII
	duration	the duration of the digit ending in ms

Returns:

Returns 0 on success, -1 on failure

Definition at line 4712 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_playtones_stop(), ast_channel::generator, ast_channel_tech::send_digit_end, ast_channel::sending_dtmf_digit, and ast_channel::tech.

Referenced by agent_digit_end(), ast_bridge_end_dtmf(), ast_senddigit(), and ast_write().

{
   int res = -1;

   ast_channel_lock(chan);
   if (chan->sending_dtmf_digit == digit) {
      chan->sending_dtmf_digit = 0;
   }
   ast_channel_unlock(chan);

   if (chan->tech->send_digit_end)
      res = chan->tech->send_digit_end(chan, digit, duration);

   if (res && chan->generator)
      ast_playtones_stop(chan);
   
   return 0;
}

int ast_sendtext	(	struct ast_channel *	chan,
		const char *	text
	)

Sends text to a channel.

Parameters:

	chan	channel to act upon
	text	string of text to send on the channel

Write text to a display on a channel

Note:

The channel does not need to be locked before calling this function.

Return values:

	0	on success
	-1	on failure

Definition at line 4644 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_check_hangup(), ast_clear_flag, AST_FLAG_BLOCKING, AST_FLAG_ZOMBIE, ast_test_flag, CHECK_BLOCKING, ast_channel_tech::send_text, and ast_channel::tech.

Referenced by action_sendtext(), agent_sendtext(), handle_sendtext(), and sendtext_exec().

{
   int res = 0;

   ast_channel_lock(chan);
   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) {
      ast_channel_unlock(chan);
      return -1;
   }
   CHECK_BLOCKING(chan);
   if (chan->tech->send_text)
      res = chan->tech->send_text(chan, text);
   ast_clear_flag(chan, AST_FLAG_BLOCKING);
   ast_channel_unlock(chan);
   return res;
}

void ast_set_callerid	(	struct ast_channel *	chan,
		const char *	cid_num,
		const char *	cid_name,
		const char *	cid_ani
	)

Set caller ID number, name and ANI and generate AMI event.

Note:

Use ast_channel_set_caller() and ast_channel_set_caller_event() instead.

The channel does not need to be locked before calling this function.

Definition at line 6994 of file channel.c.

References ast_party_caller::ani, ast_cdr_setcid(), ast_channel_lock, ast_channel_unlock, ast_free, ast_strdup, ast_channel::caller, ast_channel::cdr, ast_party_caller::id, ast_party_id::name, ast_party_id::number, report_new_callerid(), ast_party_name::str, ast_party_number::str, ast_party_name::valid, and ast_party_number::valid.

Referenced by __analog_ss_thread(), __ast_request_and_dial(), analog_ss_thread(), cb_events(), disa_exec(), get_pai(), get_rpid(), handle_setcallerid(), mgcp_ss(), privacy_exec(), ring_entry(), skinny_newcall(), and socket_process().

{
   ast_channel_lock(chan);

   if (cid_num) {
      chan->caller.id.number.valid = 1;
      ast_free(chan->caller.id.number.str);
      chan->caller.id.number.str = ast_strdup(cid_num);
   }
   if (cid_name) {
      chan->caller.id.name.valid = 1;
      ast_free(chan->caller.id.name.str);
      chan->caller.id.name.str = ast_strdup(cid_name);
   }
   if (cid_ani) {
      chan->caller.ani.number.valid = 1;
      ast_free(chan->caller.ani.number.str);
      chan->caller.ani.number.str = ast_strdup(cid_ani);
   }
   if (chan->cdr) {
      ast_cdr_setcid(chan->cdr, chan);
   }

   report_new_callerid(chan);

   ast_channel_unlock(chan);
}

void ast_set_hangupsource	(	struct ast_channel *	chan,
		const char *	source,
		int	force
	)

Set the source of the hangup in this channel and it's bridge.

Parameters:

	chan	channel to set the field on
	source	a string describing the source of the hangup for this channel
	force

Note:

Absolutely _NO_ channel locks should be held before calling this function.

Since:

1.8

Hangupsource is generally the channel name that caused the bridge to be hung up, but it can also be other things such as "dialplan/agi" This can then be logged in the CDR or CEL

Definition at line 2769 of file channel.c.

References ast_bridged_channel(), ast_channel_lock, ast_channel_ref, ast_channel_unlock, ast_channel_unref, ast_string_field_set, ast_strlen_zero(), and ast_channel::bridge.

Referenced by __dahdi_exception(), analog_exception(), func_channel_write_real(), handle_hangup(), pbx_builtin_hangup(), set_hangup_source_and_cause(), and sip_queue_hangup_cause().

{
   struct ast_channel *bridge;

   ast_channel_lock(chan);
   if (force || ast_strlen_zero(chan->hangupsource)) {
      ast_string_field_set(chan, hangupsource, source);
   }
   bridge = ast_bridged_channel(chan);
   if (bridge) {
      ast_channel_ref(bridge);
   }
   ast_channel_unlock(chan);

   if (bridge) {
      ast_channel_lock(bridge);
      if (force || ast_strlen_zero(bridge->hangupsource)) {
         ast_string_field_set(bridge, hangupsource, source);
      }
      ast_channel_unlock(bridge);
      ast_channel_unref(bridge);
   }
}

int ast_set_read_format	(	struct ast_channel *	chan,
		format_t	format
	)

Sets read format on channel chan Set read format for channel to whichever component of "format" is best.

Parameters:

	chan	channel to change
	format	format to change to

Returns:

Returns 0 on success, -1 on failure

Definition at line 5258 of file channel.c.

References ast_channel::rawreadformat, ast_channel::readformat, ast_channel::readtrans, and set_format().

Referenced by __ast_play_and_record(), __oh323_update_info(), adsi_transmit_message_full(), agent_call(), alarmreceiver_exec(), ast_channel_make_compatible_helper(), ast_do_masquerade(), background_detect_exec(), bridge_channel_join(), bridge_make_compatible(), build_conf(), conf_run(), dictate_exec(), do_waiting(), eagi_exec(), echo_exec(), generic_fax_exec(), gtalk_rtp_read(), handle_recordfile(), handle_speechrecognize(), ices_exec(), isAnsweringMachine(), jack_exec(), jingle_rtp_read(), login_exec(), measurenoise(), meetme_menu_admin_extended(), mgcp_rtp_read(), oh323_rtp_read(), old_milliwatt_exec(), process_sdp(), record_exec(), setup_rtp_connection(), sip_rtp_read(), skinny_rtp_read(), socket_process(), speech_background(), transmit_audio(), and unistim_rtp_read().

{
   return set_format(chan, fmt, &chan->rawreadformat, &chan->readformat,
           &chan->readtrans, 0);
}

void ast_set_variables	(	struct ast_channel *	chan,
		struct ast_variable *	vars
	)

adds a list of channel variables to a channel

Parameters:

	chan	the channel
	vars	a linked list of variables

Variable names can be for a regular channel variable or a dialplan function that has the ability to be written to.

Definition at line 8199 of file channel.c.

References ast_variable::name, ast_variable::next, pbx_builtin_setvar_helper(), and ast_variable::value.

Referenced by __ast_request_and_dial(), ast_call_forward(), ast_pbx_outgoing_app(), and ast_pbx_outgoing_exten().

{
   struct ast_variable *cur;

   for (cur = vars; cur; cur = cur->next)
      pbx_builtin_setvar_helper(chan, cur->name, cur->value);  
}

int ast_set_write_format	(	struct ast_channel *	chan,
		format_t	format
	)

Sets write format on channel chan Set write format for channel to whichever component of "format" is best.

Parameters:

	chan	channel to change
	format	new format for writing

Returns:

Returns 0 on success, -1 on failure

Definition at line 5264 of file channel.c.

References ast_channel::rawwriteformat, set_format(), ast_channel::writeformat, and ast_channel::writetrans.

Referenced by __oh323_update_info(), adsi_transmit_message_full(), agent_call(), alarmreceiver_exec(), ast_channel_make_compatible_helper(), ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), ast_do_masquerade(), ast_openstream_full(), ast_stopstream(), ast_write(), bridge_channel_join(), bridge_make_compatible(), build_conf(), chanspy_exec(), conf_run(), dahdiscan_exec(), echo_exec(), extenspy_exec(), generic_fax_exec(), gtalk_rtp_read(), jack_exec(), jingle_rtp_read(), linear_alloc(), linear_release(), login_exec(), meetme_menu_admin_extended(), mgcp_rtp_read(), moh_alloc(), moh_files_release(), moh_release(), mp3_exec(), NBScat_exec(), oh323_rtp_read(), old_milliwatt_exec(), playtones_alloc(), playtones_release(), process_sdp(), send_waveform_to_channel(), setup_rtp_connection(), sip_rtp_read(), skinny_rtp_read(), socket_process(), tonepair_alloc(), tonepair_release(), transmit_audio(), and unistim_rtp_read().

{
   return set_format(chan, fmt, &chan->rawwriteformat, &chan->writeformat,
           &chan->writetrans, 1);
}

int ast_settimeout	(	struct ast_channel *	c,
		unsigned int	rate,
		int(*)(const void *data)	func,
		void *	data
	)

Enable or disable timer ticks for a channel.

Parameters:

	c	channel
	rate	number of timer ticks per second
	func	callback function
	data

If timers are supported, force a scheduled expiration on the timer fd, at which point we call the callback function / data

Note:

Call this function with a rate of 0 to turn off the timer ticks

Version:

1.6.1 changed samples parameter to rate, accomodates new timing methods

Definition at line 3546 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_debug, ast_timer_get_max_rate(), ast_timer_set_rate(), AST_TIMING_FD, ast_channel::fdno, ast_channel::timer, ast_channel::timingdata, ast_channel::timingfd, and ast_channel::timingfunc.

Referenced by ast_activate_generator(), ast_deactivate_generator(), ast_read_generator_actions(), ast_readaudio_callback(), filestream_close(), and internal_deactivate_generator().

{
   int res;
   unsigned int real_rate = rate, max_rate;

   ast_channel_lock(c);

   if (c->timingfd == -1) {
      ast_channel_unlock(c);
      return -1;
   }

   if (!func) {
      rate = 0;
      data = NULL;
   }

   if (rate && rate > (max_rate = ast_timer_get_max_rate(c->timer))) {
      real_rate = max_rate;
   }

   ast_debug(1, "Scheduling timer at (%u requested / %u actual) timer ticks per second\n", rate, real_rate);

   res = ast_timer_set_rate(c->timer, real_rate);

   c->timingfunc = func;
   c->timingdata = data;

   if (func == NULL && rate == 0 && c->fdno == AST_TIMING_FD) {
      /* Clearing the timing func and setting the rate to 0
       * means that we don't want to be reading from the timingfd
       * any more. Setting c->fdno to -1 means we won't have any
       * errant reads from the timingfd, meaning we won't potentially
       * miss any important frames.
       */
      c->fdno = -1;
   }

   ast_channel_unlock(c);

   return res;
}

int ast_shutting_down

(

void

)

Returns non-zero if Asterisk is being shut down.

Returns:

non-zero if Asterisk is being shut down

Definition at line 865 of file channel.c.

Referenced by handle_request_options().

{
   return shutting_down;
}

int ast_softhangup	(	struct ast_channel *	chan,
		int	cause
	)

Softly hangup up a channel.

Parameters:

	chan	channel to be soft-hung-up
	reason	an AST_SOFTHANGUP_* reason code

Call the protocol layer, but don't destroy the channel structure (use this if you are trying to safely hangup a channel managed by another thread.

Note:

The channel passed to this function does not need to be locked.

Returns:

Returns 0 regardless

Definition at line 2746 of file channel.c.

References ast_channel_lock, ast_channel_unlock, and ast_softhangup_nolock().

Referenced by __analog_handle_event(), __ast_module_user_hangup_all(), __ast_pbx_run(), __unload_module(), agent_hangup(), agent_logoff(), agent_read(), ast_bridge_call(), ast_channel_softhangup_cb(), ast_dial_join(), cc_generic_agent_stop_ringing(), conf_free(), dahdi_handle_event(), handle_hangup(), handle_softhangup(), login_exec(), manager_park(), mgcp_pktcgate_remove(), read_agent_config(), sla_handle_hold_event(), softhangup_exec(), start_spying(), startmon(), and unload_module().

{
   int res;

   ast_channel_lock(chan);
   res = ast_softhangup_nolock(chan, cause);
   ast_channel_unlock(chan);

   return res;
}

int ast_softhangup_nolock	(	struct ast_channel *	chan,
		int	cause
	)

Softly hangup up a channel (no channel lock).

Parameters:

	chan	channel to be soft-hung-up
	reason	an AST_SOFTHANGUP_* reason code

Definition at line 2733 of file channel.c.

References ast_channel::_softhangup, ast_debug, AST_FLAG_BLOCKING, ast_null_frame, ast_queue_frame(), ast_test_flag, and ast_channel::blocker.

Referenced by __analog_handle_event(), action_hangup(), analog_attempt_transfer(), ast_async_goto(), ast_softhangup(), attempt_transfer(), check_pendings(), check_rtp_timeout(), dahdi_softhangup_all(), oh323_indicate(), proc_session_timer(), sip_indicate(), and skinny_indicate().

{
   ast_debug(1, "Soft-Hanging up channel '%s'\n", chan->name);
   /* Inform channel driver that we need to be hung up, if it cares */
   chan->_softhangup |= cause;
   ast_queue_frame(chan, &ast_null_frame);
   /* Interrupt any poll call or such */
   if (ast_test_flag(chan, AST_FLAG_BLOCKING))
      pthread_kill(chan->blocker, SIGURG);
   return 0;
}

const char* ast_state2str

(

enum ast_channel_state

state

)

Gives the string form of a given channel state.

Parameters:

ast_channel_state

state to get the name of

Returns:

the text form of the binary state given

Note:

This function is not reentrant.

Definition at line 1007 of file channel.c.

References AST_STATE_BUSY, AST_STATE_DIALING, AST_STATE_DIALING_OFFHOOK, AST_STATE_DOWN, AST_STATE_OFFHOOK, AST_STATE_PRERING, AST_STATE_RESERVED, AST_STATE_RING, AST_STATE_RINGING, AST_STATE_UP, ast_threadstorage_get(), STATE2STR_BUFSIZE, and state2str_threadbuf.

Referenced by __ast_channel_alloc_ap(), action_coreshowchannels(), action_status(), agent_hangup(), ast_channel_data_add_structure(), ast_do_masquerade(), ast_setstate(), attempt_transfer(), func_channel_read(), handle_chanlist(), handle_showchan(), local_attended_transfer(), mgcp_new(), serialize_showchan(), sip_hangup(), and update_connectedline().

{
   char *buf;

   switch (state) {
   case AST_STATE_DOWN:
      return "Down";
   case AST_STATE_RESERVED:
      return "Rsrvd";
   case AST_STATE_OFFHOOK:
      return "OffHook";
   case AST_STATE_DIALING:
      return "Dialing";
   case AST_STATE_RING:
      return "Ring";
   case AST_STATE_RINGING:
      return "Ringing";
   case AST_STATE_UP:
      return "Up";
   case AST_STATE_BUSY:
      return "Busy";
   case AST_STATE_DIALING_OFFHOOK:
      return "Dialing Offhook";
   case AST_STATE_PRERING:
      return "Pre-ring";
   default:
      if (!(buf = ast_threadstorage_get(&state2str_threadbuf, STATE2STR_BUFSIZE)))
         return "Unknown";
      snprintf(buf, STATE2STR_BUFSIZE, "Unknown (%d)", state);
      return buf;
   }
}

int ast_str2cause

(

const char *

name

)

Convert the string form of a cause code to a number.

Parameters:

name

string form of the cause

Returns:

the cause code

Definition at line 993 of file channel.c.

References ARRAY_LEN, and causes.

Referenced by pbx_builtin_hangup().

{
   int x;

   for (x = 0; x < ARRAY_LEN(causes); x++)
      if (!strncasecmp(causes[x].name, name, strlen(causes[x].name)))
         return causes[x].cause;

   return -1;
}

int ast_tonepair	(	struct ast_channel *	chan,
		int	freq1,
		int	freq2,
		int	duration,
		int	vol
	)

Play a tone pair for a given amount of time

Definition at line 7907 of file channel.c.

References ast_frfree, ast_read(), ast_tonepair_start(), ast_waitfor(), and ast_channel::generatordata.

Referenced by zapateller_exec().

{
   int res;

   if ((res = ast_tonepair_start(chan, freq1, freq2, duration, vol)))
      return res;

   /* Give us some wiggle room */
   while (chan->generatordata && ast_waitfor(chan, 100) >= 0) {
      struct ast_frame *f = ast_read(chan);
      if (f)
         ast_frfree(f);
      else
         return -1;
   }
   return 0;
}

int ast_tonepair_start	(	struct ast_channel *	chan,
		int	freq1,
		int	freq2,
		int	duration,
		int	vol
	)

Start a tone going

Definition at line 7889 of file channel.c.

References ast_activate_generator(), tonepair_def::duration, tonepair_def::freq1, tonepair_def::freq2, and tonepair_def::vol.

Referenced by ast_tonepair(), pbx_builtin_waitexten(), play_dialtone(), and sendnoise().

{
   struct tonepair_def d = { 0, };

   d.freq1 = freq1;
   d.freq2 = freq2;
   d.duration = duration;
   d.vol = (vol < 1) ? 8192 : vol; /* force invalid to 8192 */
   if (ast_activate_generator(chan, &tonepair, &d))
      return -1;
   return 0;
}

void ast_tonepair_stop

(

struct ast_channel *

chan

)

Stop a tone from playing

Definition at line 7902 of file channel.c.

References ast_deactivate_generator().

Referenced by sendnoise().

{
   ast_deactivate_generator(chan);
}

int ast_transfer	(	struct ast_channel *	chan,
		char *	dest
	)

Transfer a channel (if supported).

Return values:

	-1	on error
	0	if not supported
	1	if supported and requested

Parameters:

	chan	current channel
	dest	destination extension for transfer

Transfer a channel (if supported).

Called by:

• app_transfer
• the manager interface

Definition at line 5745 of file channel.c.

References ast_channel_lock, ast_channel_unlock, ast_check_hangup(), AST_CONTROL_TRANSFER, AST_FLAG_ZOMBIE, AST_FRAME_CONTROL, ast_frfree, ast_read(), ast_test_flag, AST_TRANSFER_SUCCESS, ast_waitfor(), ast_frame::data, ast_frame::frametype, ast_frame_subclass::integer, ast_frame::ptr, ast_frame::subclass, ast_channel::tech, and ast_channel_tech::transfer.

Referenced by transfer_exec().

{
   int res = -1;

   /* Stop if we're a zombie or need a soft hangup */
   ast_channel_lock(chan);
   if (!ast_test_flag(chan, AST_FLAG_ZOMBIE) && !ast_check_hangup(chan)) {
      if (chan->tech->transfer) {
         res = chan->tech->transfer(chan, dest);
         if (!res)
            res = 1;
      } else
         res = 0;
   }
   ast_channel_unlock(chan);

   if (res <= 0) {
      return res;
   }

   for (;;) {
      struct ast_frame *fr;

      res = ast_waitfor(chan, -1);

      if (res < 0 || !(fr = ast_read(chan))) {
         res = -1;
         break;
      }

      if (fr->frametype == AST_FRAME_CONTROL && fr->subclass.integer == AST_CONTROL_TRANSFER) {
         enum ast_control_transfer *message = fr->data.ptr;

         if (*message == AST_TRANSFER_SUCCESS) {
            res = 1;
         } else {
            res = -1;
         }

         ast_frfree(fr);
         break;
      }

      ast_frfree(fr);
   }

   return res;
}

char* ast_transfercapability2str

(

int

transfercapability

)

const

Gives the string form of a given transfer capability.

Parameters:

transfercapability

transfer capability to get the name of

Returns:

the text form of the binary transfer capability

Definition at line 1041 of file channel.c.

References AST_TRANS_CAP_3_1K_AUDIO, AST_TRANS_CAP_DIGITAL, AST_TRANS_CAP_DIGITAL_W_TONES, AST_TRANS_CAP_RESTRICTED_DIGITAL, AST_TRANS_CAP_SPEECH, and AST_TRANS_CAP_VIDEO.

Referenced by ast_channel_data_add_structure(), cb_events(), misdn_call(), and oh323_call().

{
   switch (transfercapability) {
   case AST_TRANS_CAP_SPEECH:
      return "SPEECH";
   case AST_TRANS_CAP_DIGITAL:
      return "DIGITAL";
   case AST_TRANS_CAP_RESTRICTED_DIGITAL:
      return "RESTRICTED_DIGITAL";
   case AST_TRANS_CAP_3_1K_AUDIO:
      return "3K1AUDIO";
   case AST_TRANS_CAP_DIGITAL_W_TONES:
      return "DIGITAL_W_TONES";
   case AST_TRANS_CAP_VIDEO:
      return "VIDEO";
   default:
      return "UNKNOWN";
   }
}

int ast_undestroyed_channels

(

void

)

Returns:

the number of channels not yet destroyed

Definition at line 853 of file channel.c.

References ast_atomic_fetchadd_int().

Referenced by can_safely_quit().

{
   return ast_atomic_fetchadd_int(&chancount, 0);
}

int ast_waitfor	(	struct ast_channel *	chan,
		int	ms
	)

Wait for input on a channel.

Parameters:

	chan	channel to wait on
	ms	length of time to wait on the channel

Wait for input on a channel for a given # of milliseconds (<0 for indefinite).

Return values:

	<	0 on failure
	0	if nothing ever arrived
	the	# of ms remaining otherwise

Definition at line 3528 of file channel.c.

References ast_waitfor_nandfds().

Referenced by __adsi_transmit_messages(), __analog_ss_thread(), __ast_answer(), __ast_play_and_record(), __ast_request_and_dial(), adsi_careful_send(), agent_ack_sleep(), analog_ss_thread(), ast_dtmf_stream(), ast_recvtext(), ast_safe_sleep_conditional(), ast_tonepair(), ast_transfer(), async_wait(), background_detect_exec(), channel_spy(), conf_flush(), dictate_exec(), disa_exec(), disable_t38(), do_waiting(), echo_exec(), handle_recordfile(), handle_speechrecognize(), ices_exec(), isAnsweringMachine(), jack_exec(), launch_asyncagi(), measurenoise(), mp3_exec(), NBScat_exec(), receive_dtmf_digits(), receivefax_t38_init(), record_exec(), recordthread(), send_tone_burst(), send_waveform_to_channel(), sendfax_t38_init(), sendurl_exec(), speech_background(), transmit_audio(), transmit_t38(), wait_for_hangup(), waitforring_exec(), and waitstream_core().

{
   if (ms < 0) {
      do {
         ms = 100000;
         ast_waitfor_nandfds(&c, 1, NULL, 0, NULL, NULL, &ms);
      } while (!ms);
   } else {
      ast_waitfor_nandfds(&c, 1, NULL, 0, NULL, NULL, &ms);
   }
   return ms;
}

struct ast_channel* ast_waitfor_n	(	struct ast_channel **	chan,
		int	n,
		int *	ms
	)			[read]

Waits for input on a group of channels Wait for input on an array of channels for a given # of milliseconds.

Returns:

Return channel with activity, or NULL if none has activity.

Parameters:

	chan	an array of pointers to channels
	n	number of channels that are to be waited upon
	ms	time "ms" is modified in-place, if applicable

Definition at line 3523 of file channel.c.

References ast_waitfor_nandfds().

Referenced by ast_generic_bridge(), ast_udptl_bridge(), autoservice_run(), dahdi_bridge(), dial_exec_full(), feature_request_and_dial(), generic_thread_loop(), iax2_bridge(), local_bridge_loop(), misdn_bridge(), monitor_dial(), remote_bridge_loop(), wait_for_answer(), and wait_for_winner().

{
   return ast_waitfor_nandfds(c, n, NULL, 0, NULL, NULL, ms);
}

int ast_waitfor_n_fd	(	int *	fds,
		int	n,
		int *	ms,
		int *	exception
	)

Waits for input on an fd.

Note:

This version works on fd's only. Be careful with it.

Definition at line 3165 of file channel.c.

References ast_waitfor_nandfds().

Referenced by dundi_lookup_internal(), dundi_precache_internal(), and softmix_bridge_thread().

{
   int winner = -1;
   ast_waitfor_nandfds(NULL, 0, fds, n, exception, &winner, ms);
   return winner;
}

struct ast_channel* ast_waitfor_nandfds	(	struct ast_channel **	c,
		int	n,
		int *	fds,
		int	nfds,
		int *	exception,
		int *	outfd,
		int *	ms
	)			[read]

Waits for activity on a group of channels.

Parameters:

	chan	an array of pointers to channels
	n	number of channels that are to be waited upon
	fds	an array of fds to wait upon
	nfds	the number of fds to wait upon
	exception	exception flag
	outfd	fd that had activity on it
	ms	how long the wait was

Big momma function here. Wait for activity on any of the n channels, or any of the nfds file descriptors.

Returns:

Returns the channel with activity, or NULL on error or if an FD came first. If the FD came first, it will be returned in outfd, otherwise, outfd will be -1

Definition at line 3177 of file channel.c.

References ast_channel::_softhangup, ast_add_fd(), ast_alloca, ast_channel_lock, ast_channel_unlock, ast_clear_flag, ast_do_masquerade(), AST_FLAG_BLOCKING, AST_FLAG_EXCEPTION, AST_MAX_FDS, ast_poll, ast_set_flag, AST_SOFTHANGUP_TIMEOUT, ast_test_suite_event_notify, ast_tvcmp(), ast_tvdiff_ms(), ast_tvnow(), ast_tvsub(), ast_tvzero(), CHECK_BLOCKING, errno, ast_channel::fdno, and name.

Referenced by ast_waitfor(), ast_waitfor_n(), ast_waitfor_n_fd(), ast_waitfordigit_full(), bridge_channel_join_multithreaded(), conf_run(), eivr_comm(), find_cache(), generic_fax_exec(), multiplexed_thread_function(), run_agi(), and waitstream_core().

{
   struct timeval start = { 0 , 0 };
   struct pollfd *pfds = NULL;
   int res;
   long rms;
   int x, y, max;
   int sz;
   struct timeval now = { 0, 0 };
   struct timeval whentohangup = { 0, 0 }, diff;
   struct ast_channel *winner = NULL;
   struct fdmap {
      int chan;
      int fdno;
   } *fdmap = NULL;

   if (outfd)
      *outfd = -99999;
   if (exception)
      *exception = 0;
   
   if ((sz = n * AST_MAX_FDS + nfds)) {
      pfds = ast_alloca(sizeof(*pfds) * sz);
      fdmap = ast_alloca(sizeof(*fdmap) * sz);
   } else {
      /* nothing to allocate and no FDs to check */
      return NULL;
   }

   /* Perform any pending masquerades */
   for (x = 0; x < n; x++) {
      while (c[x]->masq) {
         ast_do_masquerade(c[x]);
      }

      ast_channel_lock(c[x]);
      if (!ast_tvzero(c[x]->whentohangup)) {
         if (ast_tvzero(whentohangup))
            now = ast_tvnow();
         diff = ast_tvsub(c[x]->whentohangup, now);
         if (diff.tv_sec < 0 || ast_tvzero(diff)) {
            ast_test_suite_event_notify("HANGUP_TIME", "Channel: %s", c[x]->name);
            /* Should already be hungup */
            c[x]->_softhangup |= AST_SOFTHANGUP_TIMEOUT;
            ast_channel_unlock(c[x]);
            return c[x];
         }
         if (ast_tvzero(whentohangup) || ast_tvcmp(diff, whentohangup) < 0)
            whentohangup = diff;
      }
      ast_channel_unlock(c[x]);
   }
   /* Wait full interval */
   rms = *ms;
   /* INT_MAX, not LONG_MAX, because it matters on 64-bit */
   if (!ast_tvzero(whentohangup) && whentohangup.tv_sec < INT_MAX / 1000) {
      rms = whentohangup.tv_sec * 1000 + whentohangup.tv_usec / 1000;              /* timeout in milliseconds */
      if (*ms >= 0 && *ms < rms) {                                                 /* original *ms still smaller */
         rms =  *ms;
      }
   } else if (!ast_tvzero(whentohangup) && rms < 0) {
      /* Tiny corner case... call would need to last >24 days */
      rms = INT_MAX;
   }
   /*
    * Build the pollfd array, putting the channels' fds first,
    * followed by individual fds. Order is important because
    * individual fd's must have priority over channel fds.
    */
   max = 0;
   for (x = 0; x < n; x++) {
      for (y = 0; y < AST_MAX_FDS; y++) {
         fdmap[max].fdno = y;  /* fd y is linked to this pfds */
         fdmap[max].chan = x;  /* channel x is linked to this pfds */
         max += ast_add_fd(&pfds[max], c[x]->fds[y]);
      }
      CHECK_BLOCKING(c[x]);
   }
   /* Add the individual fds */
   for (x = 0; x < nfds; x++) {
      fdmap[max].chan = -1;
      max += ast_add_fd(&pfds[max], fds[x]);
   }

   if (*ms > 0)
      start = ast_tvnow();
   
   if (sizeof(int) == 4) { /* XXX fix timeout > 600000 on linux x86-32 */
      do {
         int kbrms = rms;
         if (kbrms > 600000)
            kbrms = 600000;
         res = ast_poll(pfds, max, kbrms);
         if (!res)
            rms -= kbrms;
      } while (!res && (rms > 0));
   } else {
      res = ast_poll(pfds, max, rms);
   }
   for (x = 0; x < n; x++)
      ast_clear_flag(c[x], AST_FLAG_BLOCKING);
   if (res < 0) { /* Simulate a timeout if we were interrupted */
      if (errno != EINTR)
         *ms = -1;
      return NULL;
   }
   if (!ast_tvzero(whentohangup)) {   /* if we have a timeout, check who expired */
      now = ast_tvnow();
      for (x = 0; x < n; x++) {
         if (!ast_tvzero(c[x]->whentohangup) && ast_tvcmp(c[x]->whentohangup, now) <= 0) {
            ast_test_suite_event_notify("HANGUP_TIME", "Channel: %s", c[x]->name);
            c[x]->_softhangup |= AST_SOFTHANGUP_TIMEOUT;
            if (winner == NULL)
               winner = c[x];
         }
      }
   }
   if (res == 0) { /* no fd ready, reset timeout and done */
      *ms = 0; /* XXX use 0 since we may not have an exact timeout. */
      return winner;
   }
   /*
    * Then check if any channel or fd has a pending event.
    * Remember to check channels first and fds last, as they
    * must have priority on setting 'winner'
    */
   for (x = 0; x < max; x++) {
      res = pfds[x].revents;
      if (res == 0)
         continue;
      if (fdmap[x].chan >= 0) {  /* this is a channel */
         winner = c[fdmap[x].chan]; /* override previous winners */
         if (res & POLLPRI)
            ast_set_flag(winner, AST_FLAG_EXCEPTION);
         else
            ast_clear_flag(winner, AST_FLAG_EXCEPTION);
         winner->fdno = fdmap[x].fdno;
      } else {       /* this is an fd */
         if (outfd)
            *outfd = pfds[x].fd;
         if (exception)
            *exception = (res & POLLPRI) ? -1 : 0;
         winner = NULL;
      }
   }
   if (*ms > 0) {
      *ms -= ast_tvdiff_ms(ast_tvnow(), start);
      if (*ms < 0)
         *ms = 0;
   }
   return winner;
}

int ast_waitfordigit	(	struct ast_channel *	c,
		int	ms
	)

Waits for a digit.

Parameters:

	c	channel to wait for a digit on
	ms	how many milliseconds to wait (<0 for indefinite).

Returns:

Returns <0 on error, 0 on no entry, and the digit on success.

Definition at line 3541 of file channel.c.

References ast_waitfordigit_full().

Referenced by __analog_ss_thread(), _while_exec(), adsi_get_cpeid(), adsi_get_cpeinfo(), adsi_print(), adsi_read_encoded_dtmf(), adsi_transmit_message_full(), advanced_options(), analog_my_getsigstr(), analog_ss_thread(), ast_app_dtget(), ast_control_streamfile(), ast_record_review(), bridge_channel_feature(), builtin_atxfer(), collect_digits(), common_exec(), cpeid_exec(), dialout(), directory_exec(), forward_message(), get_folder(), ivr_dispatch(), mgcp_ss(), my_getsigstr(), pbx_builtin_waitexten(), play_record_review(), read_exec(), read_newoption(), readexten_exec(), retrydial_exec(), select_item_menu(), select_item_pause(), select_item_seq(), sendnoise(), testclient_exec(), testserver_exec(), vm_execmain(), vm_forwardoptions(), vm_instructions_en(), vm_options(), vm_tempgreeting(), wait_a_bit(), and wait_our_turn().

{
   return ast_waitfordigit_full(c, ms, -1, -1);
}

int ast_waitfordigit_full	(	struct ast_channel *	c,
		int	ms,
		int	audiofd,
		int	ctrlfd
	)

Wait for a digit Same as ast_waitfordigit() with audio fd for outputting read audio and ctrlfd to monitor for reading.

Parameters:

	c	channel to wait for a digit on
	ms	how many milliseconds to wait (<0 for indefinite).
	audiofd	audio file descriptor to write to if audio frames are received
	ctrlfd	control file descriptor to monitor for reading

Returns:

Returns 1 if ctrlfd becomes available

Definition at line 3589 of file channel.c.

References ast_check_hangup(), ast_clear_flag, AST_CONTROL_ANSWER, AST_CONTROL_CONNECTED_LINE, AST_CONTROL_HANGUP, AST_CONTROL_HOLD, AST_CONTROL_REDIRECTING, AST_CONTROL_RINGING, AST_CONTROL_SRCCHANGE, AST_CONTROL_SRCUPDATE, AST_CONTROL_UNHOLD, AST_CONTROL_UPDATE_RTP_PEER, AST_FLAG_END_DTMF_ONLY, AST_FLAG_ZOMBIE, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_VOICE, ast_frfree, ast_log(), ast_read(), ast_remaining_ms(), ast_set_flag, ast_test_flag, ast_tvnow(), ast_waitfor_nandfds(), ast_frame::data, ast_frame::datalen, errno, ast_frame::frametype, ast_frame_subclass::integer, LOG_WARNING, ast_frame::ptr, and ast_frame::subclass.

Referenced by ast_readstring_full(), ast_waitfordigit(), handle_getoption(), and handle_waitfordigit().

{
   struct timeval start = ast_tvnow();
   int ms;

   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(c, AST_FLAG_ZOMBIE) || ast_check_hangup(c))
      return -1;

   /* Only look for the end of DTMF, don't bother with the beginning and don't emulate things */
   ast_set_flag(c, AST_FLAG_END_DTMF_ONLY);

   /* Wait for a digit, no more than timeout_ms milliseconds total.
    * Or, wait indefinitely if timeout_ms is <0.
    */
   while ((ms = ast_remaining_ms(start, timeout_ms))) {
      struct ast_channel *rchan;
      int outfd = -1;

      errno = 0;
      /* While ast_waitfor_nandfds tries to help by reducing the timeout by how much was waited,
       * it is unhelpful if it waited less than a millisecond.
       */
      rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);

      if (!rchan && outfd < 0 && ms) {
         if (errno == 0 || errno == EINTR)
            continue;
         ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
         ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
         return -1;
      } else if (outfd > -1) {
         /* The FD we were watching has something waiting */
         ast_log(LOG_WARNING, "The FD we were waiting for has something waiting. Waitfordigit returning numeric 1\n");
         ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
         return 1;
      } else if (rchan) {
         int res;
         struct ast_frame *f = ast_read(c);
         if (!f)
            return -1;

         switch (f->frametype) {
         case AST_FRAME_DTMF_BEGIN:
            break;
         case AST_FRAME_DTMF_END:
            res = f->subclass.integer;
            ast_frfree(f);
            ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
            return res;
         case AST_FRAME_CONTROL:
            switch (f->subclass.integer) {
            case AST_CONTROL_HANGUP:
               ast_frfree(f);
               ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
               return -1;
            case AST_CONTROL_RINGING:
            case AST_CONTROL_ANSWER:
            case AST_CONTROL_SRCUPDATE:
            case AST_CONTROL_SRCCHANGE:
            case AST_CONTROL_CONNECTED_LINE:
            case AST_CONTROL_REDIRECTING:
            case AST_CONTROL_UPDATE_RTP_PEER:
            case AST_CONTROL_HOLD:
            case AST_CONTROL_UNHOLD:
            case -1:
               /* Unimportant */
               break;
            default:
               ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", f->subclass.integer);
               break;
            }
            break;
         case AST_FRAME_VOICE:
            /* Write audio if appropriate */
            if (audiofd > -1) {
               if (write(audiofd, f->data.ptr, f->datalen) < 0) {
                  ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
               }
            }
         default:
            /* Ignore */
            break;
         }
         ast_frfree(f);
      }
   }

   ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);

   return 0; /* Time is up */
}

int ast_write	(	struct ast_channel *	chan,
		struct ast_frame *	frame
	)

Write a frame to a channel This function writes the given frame to the indicated channel.

Parameters:

	chan	destination channel of the frame
	frame	frame that will be written

Returns:

It returns 0 on success, -1 on failure.

Todo:

XXX should return 0 maybe ?

Definition at line 4873 of file channel.c.

References ast_channel::_softhangup, apply_plc(), ast_audiohook_detach_list(), AST_AUDIOHOOK_DIRECTION_WRITE, ast_audiohook_write_list(), ast_audiohook_write_list_empty(), ast_channel_lock, ast_channel_trylock, ast_channel_unlock, ast_check_hangup(), ast_clear_flag, AST_CONTROL_UNHOLD, ast_deactivate_generator(), ast_debug, ast_do_masquerade(), AST_FLAG_BLOCKING, AST_FLAG_WRITE_INT, AST_FLAG_ZOMBIE, AST_FORMAT_AUDIO_MASK, ast_format_rate(), AST_FORMAT_SLINEAR, AST_FORMAT_T140, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, ast_frame_dump(), AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_framehook_list_write_event(), ast_frfree, ast_frisolate(), ast_getformatname(), ast_getformatname_multiple(), AST_LIST_NEXT, ast_log(), AST_MONITOR_RUNNING, ast_opt_generic_plc, ast_seekstream(), ast_senddigit_begin(), ast_senddigit_end(), ast_set_write_format(), AST_SOFTHANGUP_DEV, ast_test_flag, ast_translate(), ast_writestream(), ast_channel::audiohooks, calc_monitor_jump(), CHECK_BLOCKING, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, DEBUGCHAN_FLAG, ast_filestream::fmt, ast_format::format, ast_channel::fout, FRAMECOUNT_INC, ast_channel::framehooks, ast_frame::frametype, ast_channel::generatordata, ast_channel_tech::indicate, ast_channel::insmpl, ast_frame_subclass::integer, ast_frame::len, LOG_WARNING, ast_channel::masq, ast_channel::masqr, ast_channel::monitor, ast_channel::nativeformats, chanlist::next, ast_channel::outsmpl, ast_frame::ptr, ast_channel::rawwriteformat, ast_channel_monitor::read_stream, ast_frame::samples, SEEK_FORCECUR, send_dtmf_event(), ast_channel_tech::send_html, ast_channel_tech::send_text, ast_frame::src, ast_channel_monitor::state, ast_frame::subclass, ast_channel::tech, ast_channel_tech::write, ast_channel_monitor::write_stream, ast_channel_tech::write_text, ast_channel_tech::write_video, ast_channel::writeformat, and ast_channel::writetrans.

Referenced by adsi_careful_send(), agent_write(), ast_bridge_call(), ast_generic_bridge(), ast_prod(), ast_readaudio_callback(), ast_readvideo_callback(), ast_udptl_bridge(), ast_write_video(), conf_queue_dtmf(), conf_run(), dahdi_bridge(), dictate_exec(), echo_exec(), fax_generator_generate(), feature_request_and_dial(), gen_generate(), generic_fax_exec(), handle_jack_audio(), iax2_bridge(), jb_get_and_deliver(), linear_generator(), local_bridge_loop(), milliwatt_generate(), misdn_bridge(), moh_files_generator(), moh_generate(), mp3_exec(), multiplexed_bridge_write(), NBScat_exec(), playtones_generator(), remote_bridge_loop(), send_tone_burst(), send_waveform_to_channel(), silence_generator_generate(), simple_bridge_write(), sms_generate(), softmix_bridge_poke(), softmix_bridge_write(), spy_generate(), t38_tx_packet_handler(), tonepair_generator(), and wait_for_answer().

{
   int res = -1;
   struct ast_frame *f = NULL;
   int count = 0;

   /*Deadlock avoidance*/
   while(ast_channel_trylock(chan)) {
      /*cannot goto done since the channel is not locked*/
      if(count++ > 10) {
         ast_debug(1, "Deadlock avoided for write to channel '%s'\n", chan->name);
         return 0;
      }
      usleep(1);
   }
   /* Stop if we're a zombie or need a soft hangup */
   if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan))
      goto done;

   /* Handle any pending masquerades */
   while (chan->masq) {
      ast_channel_unlock(chan);
      ast_do_masquerade(chan);
      ast_channel_lock(chan);
   }
   if (chan->masqr) {
      res = 0; /* XXX explain, why 0 ? */
      goto done;
   }

   /* Perform the framehook write event here. After the frame enters the framehook list
    * there is no telling what will happen, how awesome is that!!! */
   if (!(fr = ast_framehook_list_write_event(chan->framehooks, fr))) {
      res = 0;
      goto done;
   }

   if (chan->generatordata && (!fr->src || strcasecmp(fr->src, "ast_prod"))) {
      if (ast_test_flag(chan, AST_FLAG_WRITE_INT)) {
            ast_deactivate_generator(chan);
      } else {
         if (fr->frametype == AST_FRAME_DTMF_END) {
            /* There is a generator running while we're in the middle of a digit.
             * It's probably inband DTMF, so go ahead and pass it so it can
             * stop the generator */
            ast_clear_flag(chan, AST_FLAG_BLOCKING);
            ast_channel_unlock(chan);
            res = ast_senddigit_end(chan, fr->subclass.integer, fr->len);
            ast_channel_lock(chan);
            CHECK_BLOCKING(chan);
         } else if (fr->frametype == AST_FRAME_CONTROL && fr->subclass.integer == AST_CONTROL_UNHOLD) {
            /* This is a side case where Echo is basically being called and the person put themselves on hold and took themselves off hold */
            res = (chan->tech->indicate == NULL) ? 0 :
               chan->tech->indicate(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
         }
         res = 0; /* XXX explain, why 0 ? */
         goto done;
      }
   }
   /* High bit prints debugging */
   if (chan->fout & DEBUGCHAN_FLAG)
      ast_frame_dump(chan->name, fr, ">>");
   CHECK_BLOCKING(chan);
   switch (fr->frametype) {
   case AST_FRAME_CONTROL:
      res = (chan->tech->indicate == NULL) ? 0 :
         chan->tech->indicate(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
      break;
   case AST_FRAME_DTMF_BEGIN:
      if (chan->audiohooks) {
         struct ast_frame *old_frame = fr;
         fr = ast_audiohook_write_list(chan, chan->audiohooks, AST_AUDIOHOOK_DIRECTION_WRITE, fr);
         if (old_frame != fr)
            f = fr;
      }
      send_dtmf_event(chan, "Sent", fr->subclass.integer, "Yes", "No");
      ast_clear_flag(chan, AST_FLAG_BLOCKING);
      ast_channel_unlock(chan);
      res = ast_senddigit_begin(chan, fr->subclass.integer);
      ast_channel_lock(chan);
      CHECK_BLOCKING(chan);
      break;
   case AST_FRAME_DTMF_END:
      if (chan->audiohooks) {
         struct ast_frame *new_frame = fr;

         new_frame = ast_audiohook_write_list(chan, chan->audiohooks, AST_AUDIOHOOK_DIRECTION_WRITE, fr);
         if (new_frame != fr) {
            ast_frfree(new_frame);
         }
      }
      send_dtmf_event(chan, "Sent", fr->subclass.integer, "No", "Yes");
      ast_clear_flag(chan, AST_FLAG_BLOCKING);
      ast_channel_unlock(chan);
      res = ast_senddigit_end(chan, fr->subclass.integer, fr->len);
      ast_channel_lock(chan);
      CHECK_BLOCKING(chan);
      break;
   case AST_FRAME_TEXT:
      if (fr->subclass.integer == AST_FORMAT_T140) {
         res = (chan->tech->write_text == NULL) ? 0 :
            chan->tech->write_text(chan, fr);
      } else {
         res = (chan->tech->send_text == NULL) ? 0 :
            chan->tech->send_text(chan, (char *) fr->data.ptr);
      }
      break;
   case AST_FRAME_HTML:
      res = (chan->tech->send_html == NULL) ? 0 :
         chan->tech->send_html(chan, fr->subclass.integer, (char *) fr->data.ptr, fr->datalen);
      break;
   case AST_FRAME_VIDEO:
      /* XXX Handle translation of video codecs one day XXX */
      res = (chan->tech->write_video == NULL) ? 0 :
         chan->tech->write_video(chan, fr);
      break;
   case AST_FRAME_MODEM:
      res = (chan->tech->write == NULL) ? 0 :
         chan->tech->write(chan, fr);
      break;
   case AST_FRAME_VOICE:
      if (chan->tech->write == NULL)
         break;   /*! \todo XXX should return 0 maybe ? */

      if (ast_opt_generic_plc && fr->subclass.codec == AST_FORMAT_SLINEAR) {
         apply_plc(chan, fr);
      }

      /* If the frame is in the raw write format, then it's easy... just use the frame - otherwise we will have to translate */
      if (fr->subclass.codec == chan->rawwriteformat) {
         f = fr;
      } else {
         if ((!(fr->subclass.codec & chan->nativeformats)) && (chan->writeformat != fr->subclass.codec)) {
            char nf[512];

            /*
             * XXX Something is not right.  We are not compatible with this
             * frame.  Bad things can happen.  Problems range from no audio,
             * one-way audio, to unexplained line hangups.  As a last resort
             * try to adjust the format.  Ideally, we do not want to do this
             * because it indicates a deeper problem.  For now, we log these
             * events to reduce user impact and help identify the problem
             * areas.
             */
            ast_log(LOG_WARNING, "Codec mismatch on channel %s setting write format to %s from %s native formats %s\n",
               chan->name, ast_getformatname(fr->subclass.codec), ast_getformatname(chan->writeformat),
               ast_getformatname_multiple(nf, sizeof(nf), chan->nativeformats & AST_FORMAT_AUDIO_MASK));
            ast_set_write_format(chan, fr->subclass.codec);
         }

         f = (chan->writetrans) ? ast_translate(chan->writetrans, fr, 0) : fr;
      }

      if (!f) {
         res = 0;
         break;
      }

      if (chan->audiohooks) {
         struct ast_frame *prev = NULL, *new_frame, *cur, *dup;
         int freeoldlist = 0;

         if (f != fr) {
            freeoldlist = 1;
         }

         /* Since ast_audiohook_write may return a new frame, and the cur frame is
          * an item in a list of frames, create a new list adding each cur frame back to it
          * regardless if the cur frame changes or not. */
         for (cur = f; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
            new_frame = ast_audiohook_write_list(chan, chan->audiohooks, AST_AUDIOHOOK_DIRECTION_WRITE, cur);

            /* if this frame is different than cur, preserve the end of the list,
             * free the old frames, and set cur to be the new frame */
            if (new_frame != cur) {

               /* doing an ast_frisolate here seems silly, but we are not guaranteed the new_frame
                * isn't part of local storage, meaning if ast_audiohook_write is called multiple
                * times it may override the previous frame we got from it unless we dup it */
               if ((dup = ast_frisolate(new_frame))) {
                  AST_LIST_NEXT(dup, frame_list) = AST_LIST_NEXT(cur, frame_list);
                  if (freeoldlist) {
                     AST_LIST_NEXT(cur, frame_list) = NULL;
                     ast_frfree(cur);
                  }
                  if (new_frame != dup) {
                     ast_frfree(new_frame);
                  }
                  cur = dup;
               }
            }

            /* now, regardless if cur is new or not, add it to the new list,
             * if the new list has not started, cur will become the first item. */
            if (prev) {
               AST_LIST_NEXT(prev, frame_list) = cur;
            } else {
               f = cur; /* set f to be the beginning of our new list */
            }
            prev = cur;
         }
      }
      
      /* If Monitor is running on this channel, then we have to write frames out there too */
      /* the translator on chan->writetrans may have returned multiple frames
         from the single frame we passed in; if so, feed each one of them to the
         monitor */
      if (chan->monitor && chan->monitor->write_stream) {
         struct ast_frame *cur;

         for (cur = f; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
         /* XXX must explain this code */
#ifndef MONITOR_CONSTANT_DELAY
            int jump = chan->insmpl - chan->outsmpl - 4 * cur->samples;
            if (jump >= 0) {
               jump = calc_monitor_jump((chan->insmpl - chan->outsmpl), ast_format_rate(f->subclass.codec), ast_format_rate(chan->monitor->read_stream->fmt->format));
               if (ast_seekstream(chan->monitor->write_stream, jump, SEEK_FORCECUR) == -1)
                  ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
               chan->outsmpl += (chan->insmpl - chan->outsmpl) + cur->samples;
            } else {
               chan->outsmpl += cur->samples;
            }
#else
            int jump = calc_monitor_jump((chan->insmpl - chan->outsmpl), ast_format_rate(f->subclass.codec), ast_format_rate(chan->monitor->read_stream->fmt->format));
            if (jump - MONITOR_DELAY >= 0) {
               if (ast_seekstream(chan->monitor->write_stream, jump - cur->samples, SEEK_FORCECUR) == -1)
                  ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
               chan->outsmpl += chan->insmpl - chan->outsmpl;
            } else {
               chan->outsmpl += cur->samples;
            }
#endif
            if (chan->monitor->state == AST_MONITOR_RUNNING) {
               if (ast_writestream(chan->monitor->write_stream, cur) < 0)
                  ast_log(LOG_WARNING, "Failed to write data to channel monitor write stream\n");
            }
         }
      }

      /* the translator on chan->writetrans may have returned multiple frames
         from the single frame we passed in; if so, feed each one of them to the
         channel, freeing each one after it has been written */
      if ((f != fr) && AST_LIST_NEXT(f, frame_list)) {
         struct ast_frame *cur, *next;
         unsigned int skip = 0;

         for (cur = f, next = AST_LIST_NEXT(cur, frame_list);
              cur;
              cur = next, next = cur ? AST_LIST_NEXT(cur, frame_list) : NULL) {
            if (!skip) {
               if ((res = chan->tech->write(chan, cur)) < 0) {
                  chan->_softhangup |= AST_SOFTHANGUP_DEV;
                  skip = 1;
               } else if (next) {
                  /* don't do this for the last frame in the list,
                     as the code outside the loop will do it once
                  */
                  chan->fout = FRAMECOUNT_INC(chan->fout);
               }
            }
            ast_frfree(cur);
         }

         /* reset f so the code below doesn't attempt to free it */
         f = NULL;
      } else {
         res = chan->tech->write(chan, f);
      }
      break;
   case AST_FRAME_NULL:
   case AST_FRAME_IAX:
      /* Ignore these */
      res = 0;
      break;
   default:
      /* At this point, fr is the incoming frame and f is NULL.  Channels do
       * not expect to get NULL as a frame pointer and will segfault.  Hence,
       * we output the original frame passed in. */
      res = chan->tech->write(chan, fr);
      break;
   }

   if (f && f != fr)
      ast_frfree(f);
   ast_clear_flag(chan, AST_FLAG_BLOCKING);

   /* Consider a write failure to force a soft hangup */
   if (res < 0) {
      chan->_softhangup |= AST_SOFTHANGUP_DEV;
   } else {
      chan->fout = FRAMECOUNT_INC(chan->fout);
   }
done:
   if (chan->audiohooks && ast_audiohook_write_list_empty(chan->audiohooks)) {
      /* The list gets recreated if audiohooks are added again later */
      ast_audiohook_detach_list(chan->audiohooks);
      chan->audiohooks = NULL;
   }
   ast_channel_unlock(chan);
   return res;
}

int ast_write_text	(	struct ast_channel *	chan,
		struct ast_frame *	frame
	)

Write text frame to a channel This function writes the given frame to the indicated channel.

Parameters:

	chan	destination channel of the frame
	frame	frame that will be written

Returns:

It returns 1 on success, 0 if not implemented, and -1 on failure.

int ast_write_video	(	struct ast_channel *	chan,
		struct ast_frame *	frame
	)

Write video frame to a channel This function writes the given frame to the indicated channel.

Parameters:

	chan	destination channel of the frame
	frame	frame that will be written

Returns:

It returns 1 on success, 0 if not implemented, and -1 on failure.

Definition at line 4758 of file channel.c.

References ast_write(), ast_channel::tech, and ast_channel_tech::write_video.

{
   int res;
   if (!chan->tech->write_video)
      return 0;
   res = ast_write(chan, fr);
   if (!res)
      res = 1;
   return res;
}

const char* channelreloadreason2txt

(

enum channelreloadreason

reason

)

Convert enum channelreloadreason to text string for manager event.

Parameters:

reason

The reason for reload (manager, cli, start etc)

\ brief Convert channel reloadreason (ENUM) to text string for manager event

Definition at line 8315 of file channel.c.

References CHANNEL_CLI_RELOAD, CHANNEL_MODULE_LOAD, and CHANNEL_MODULE_RELOAD.

Referenced by reload_config().

{
   switch (reason) {
   case CHANNEL_MODULE_LOAD:
      return "LOAD (Channel module load)";

   case CHANNEL_MODULE_RELOAD:
      return "RELOAD (Channel module reload)";

   case CHANNEL_CLI_RELOAD:
      return "CLIRELOAD (Channel module reload by CLI command)";

   default:
      return "MANAGERRELOAD (Channel module reload by manager)";
   }
};

---

Variable Documentation

struct ast_channel_tech ast_kill_tech

Kill the channel channel driver technology descriptor.

The purpose of this channel technology is to encourage the channel to hangup as quickly as possible.

Note:

Used by DTMF atxfer and zombie channels.

Definition at line 668 of file channel.c.

Referenced by ast_do_masquerade().

unsigned long global_fin

The current value of the debug flags is stored in the two variables global_fin and global_fout (declared in main/channel.c)

Definition at line 104 of file channel.c.

Referenced by handle_core_set_debug_channel().

unsigned long global_fout

Definition at line 104 of file channel.c.

Referenced by handle_core_set_debug_channel().