Sat Nov 1 06:29:00 2008

Asterisk developer's documentation


channel.h File Reference

General Asterisk PBX channel definitions. More...

#include "asterisk/abstract_jb.h"
#include <unistd.h>
#include <sys/poll.h>
#include "asterisk/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/compiler.h"

Include dependency graph for channel.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  ast_bridge_config
struct  ast_callerid
 Structure for all kinds of caller ID identifications. More...
struct  ast_channel
 Main Channel structure associated with a channel. This is the side of it mostly used by the pbx and call management. More...
struct  ast_channel_tech
 Structure to describe a channel "technology", ie a channel driver See for examples:. More...
struct  ast_datastore
 Structure for a channel data store. More...
struct  ast_datastore_info
 Structure for a data store type. More...
struct  ast_generator
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_CHANNEL_NAME   80
#define AST_GENERATOR_FD   (AST_MAX_FDS-4)
#define AST_MAX_CONTEXT   80
#define AST_MAX_EXTENSION   80
#define AST_MAX_FDS   8
#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 LOAD_OH(oh)
#define MAX_LANGUAGE   20
#define MAX_MUSICCLASS   80

Typedefs

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_WHISPER = (1 << 11), AST_FLAG_IN_DTMF = (1 << 12),
  AST_FLAG_EMULATE_DTMF = (1 << 13), AST_FLAG_END_DTMF_ONLY = (1 << 14), AST_FLAG_MASQ_NOSTREAM = (1 << 15), AST_FLAG_BRIDGE_HANGUP_RUN = (1 << 16)
}
 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_NO_H_EXTEN = (1 << 6)
}
 ast_bridge_config flags More...
enum  { AST_CDR_TRANSFER = (1 << 0), AST_CDR_FORWARD = (1 << 1), AST_CDR_CALLWAIT = (1 << 2), AST_CDR_CONFERENCE = (1 << 3) }
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)
}
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_channel_state {
  AST_STATE_DOWN, AST_STATE_RESERVED, AST_STATE_OFFHOOK, AST_STATE_DIALING,
  AST_STATE_RING, AST_STATE_RINGING, AST_STATE_UP, AST_STATE_BUSY,
  AST_STATE_DIALING_OFFHOOK, AST_STATE_PRERING, AST_STATE_MUTE = (1 << 16)
}
 ast_channel states 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

ast_channel__ast_request_and_dial (const char *type, int format, void *data, int timeout, int *reason, const char *cidnum, const char *cidname, struct outgoing_helper *oh)
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 ringing call.
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)
 Initiate system shutdown.
int ast_best_codec (int fmts)
 Pick the best audio codec.
ast_channelast_bridged_channel (struct ast_channel *chan)
 Find bridged channel.
int ast_call (struct ast_channel *chan, char *addr, int timeout)
 Make a call.
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 hangup cause.
void ast_change_name (struct ast_channel *chan, char *newname)
 Change channel name.
ast_channelast_channel_alloc (int needqueue, int state, const char *cid_num, const char *cid_name, const char *acctcode, const char *exten, const char *context, const int amaflag, const char *name_fmt,...)
 Create a channel structure.
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.
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_datastore_add (struct ast_channel *chan, struct ast_datastore *datastore)
 Add a datastore to a channel.
ast_datastoreast_channel_datastore_alloc (const struct ast_datastore_info *info, char *uid)
 Create a channel datastore structure.
ast_datastoreast_channel_datastore_find (struct ast_channel *chan, const struct ast_datastore_info *info, char *uid)
 Find a datastore on a channel.
int ast_channel_datastore_free (struct ast_datastore *datastore)
 Free a channel datastore structure.
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)
 Set defer DTMF flag on channel.
void ast_channel_free (struct ast_channel *)
 Free a channel structure.
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.
ast_frameast_channel_queryoption (struct ast_channel *channel, int option, void *data, int *datalen, int block)
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_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.
int ast_channel_sendhtml (struct ast_channel *channel, int subclass, const char *data, int datalen)
int ast_channel_sendurl (struct ast_channel *channel, const char *url)
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.
ast_silence_generatorast_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)
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.
ast_channelast_channel_walk_locked (const struct ast_channel *prev)
 Browse channels in use Browse the channels currently in use.
int ast_channel_whisper_feed (struct ast_channel *chan, struct ast_frame *f)
 Feed an audio frame into the whisper buffer on a channel.
int ast_channel_whisper_start (struct ast_channel *chan)
 Begin 'whispering' onto a channel.
void ast_channel_whisper_stop (struct ast_channel *chan)
 Stop 'whispering' onto a channel.
ast_variableast_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.
void ast_deactivate_generator (struct ast_channel *chan)
int ast_do_masquerade (struct ast_channel *chan)
 Start masquerading a channel XXX This is a seriously wacked 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.
static int ast_fdisset (struct pollfd *pfds, int fd, int max, int *start)
 Helper function for migrating select to poll.
ast_channelast_get_channel_by_exten_locked (const char *exten, const char *context)
 Get channel by exten (and optionally context) and lock it.
ast_channelast_get_channel_by_name_locked (const char *chan)
 Get channel by name (locks channel).
ast_channelast_get_channel_by_name_prefix_locked (const char *name, const int namelen)
 Get channel by name prefix (locks channel).
ast_channel_techast_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.
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 an outgoing frame.
int ast_queue_hangup (struct ast_channel *chan)
 Queue a hangup frame.
ast_frameast_read (struct ast_channel *chan)
 Reads a frame.
ast_frameast_read_noaudio (struct ast_channel *chan)
 Reads a frame, returning AST_FRAME_NULL frame if audio. Read a frame.
int ast_readstring (struct ast_channel *c, char *s, int len, int timeout, int rtimeout, char *enders)
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.
ast_channelast_request (const char *type, int format, void *data, int *status)
 Requests a channel.
ast_channelast_request_and_dial (const char *type, int format, void *data, int timeout, int *reason, const char *cidnum, const char *cidname)
 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 specied 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 specied amount of time, looking for hangups and a condition argument.
char * ast_safe_string_alloc (const char *fmt,...)
 printf the string into a correctly sized mallocd buffer, and return the buffer
static int ast_select (int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tvp)
 Waits for activity on a group of channels.
int ast_senddigit (struct ast_channel *chan, char digit)
 Send a DTMF digit to a channel Send a DTMF digit to a channel.
int ast_senddigit_begin (struct ast_channel *chan, char digit)
int ast_senddigit_end (struct ast_channel *chan, char digit, unsigned int duration)
int ast_sendtext (struct ast_channel *chan, const char *text)
 Sends text to a channel Write text to a display on a channel.
void ast_set_callerid (struct ast_channel *chan, const char *cidnum, const char *cidname, const char *ani)
int ast_set_read_format (struct ast_channel *chan, int 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, int format)
 Sets write format on channel chan Set write format for channel to whichever compoent of "format" is best.
int ast_setstate (struct ast_channel *chan, enum ast_channel_state)
 Change the state of a channel.
int ast_settimeout (struct ast_channel *c, int samples, int(*func)(const void *data), void *data)
int ast_shutting_down (void)
 Returns non-zero if Asterisk is being shut down.
int ast_softhangup (struct ast_channel *chan, int cause)
 Softly hangup up a channel.
int ast_softhangup_nolock (struct ast_channel *chan, int cause)
 Softly hangup up a channel (no channel lock).
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 a symbolic hangup cause to 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). Returns -1 on error, 0 if not supported and 1 if supported and requested.
char * ast_transfercapability2str (int transfercapability) attribute_const
 Gives the string form of a given transfer capability.
int ast_waitfor (struct ast_channel *chan, int ms)
 Wait for input on a channel.
ast_channelast_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 This version works on fd's only. Be careful with it.
ast_channelast_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.
ast_channelast_walk_channel_by_exten_locked (const struct ast_channel *chan, const char *exten, const char *context)
 Get next channel by exten (and optionally context) and lock it.
ast_channelast_walk_channel_by_name_prefix_locked (const struct ast_channel *chan, const char *name, const int namelen)
 Get channel by name prefix (locks channel).
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_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.


Detailed Description

General Asterisk PBX channel definitions.

See also:

Definition in file channel.h.


Define Documentation

#define AST_AGENT_FD   (AST_MAX_FDS-3)

used by agents for pass through

Definition at line 130 of file channel.h.

Referenced by agent_read().

#define AST_ALERT_FD   (AST_MAX_FDS-1)

used for alertpipe

Definition at line 128 of file channel.h.

Referenced by ast_channel_alloc(), and restore_channel().

#define AST_BRIDGE_DTMF_CHANNEL_0   (1 << 0)

Report DTMF on channel 0.

Definition at line 1000 of file channel.h.

Referenced by ast_generic_bridge(), bridge_native_loop(), dahdi_bridge(), iax2_bridge(), misdn_bridge(), and set_config_flags().

#define AST_BRIDGE_DTMF_CHANNEL_1   (1 << 1)

Report DTMF on channel 1.

Definition at line 1002 of file channel.h.

Referenced by ast_generic_bridge(), bridge_native_loop(), dahdi_bridge(), iax2_bridge(), misdn_bridge(), and set_config_flags().

#define AST_BRIDGE_IGNORE_SIGS   (1 << 4)

Ignore all signal frames except NULL.

Definition at line 1008 of file channel.h.

Referenced by bridge_native_loop().

#define AST_BRIDGE_REC_CHANNEL_0   (1 << 2)

Return all voice frames on channel 0.

Definition at line 1004 of file channel.h.

#define AST_BRIDGE_REC_CHANNEL_1   (1 << 3)

Return all voice frames on channel 1.

Definition at line 1006 of file channel.h.

#define AST_CHANNEL_NAME   80

Max length of an ast_channel name

Definition at line 105 of file channel.h.

Referenced by agent_devicestate_cb(), ast_channel_free(), ast_parse_device_state(), ast_setstate(), create_jb(), fast_originate(), next_channel(), page_exec(), park_call_full(), and softhangup_exec().

#define AST_GENERATOR_FD   (AST_MAX_FDS-4)

used by generator

Definition at line 131 of file channel.h.

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

#define AST_MAX_CONTEXT   80

Max length of a context

Definition at line 104 of file channel.h.

Referenced by _macro_exec(), cleanup_stale_contexts(), conf_run(), gtalk_load_config(), reload_config(), and try_calling().

#define AST_MAX_EXTENSION   80

Max length of an extension

Definition at line 103 of file channel.h.

Referenced by add_extensions(), advanced_options(), ast_bridge_call(), ast_device_state_changed(), ast_extension_state2(), ast_hint_state_changed(), ast_ivr_menu_run_internal(), begin_dial(), conf_run(), destroy_station(), disa_exec(), do_parking_thread(), dundi_lookup_local(), forward_message(), function_enum(), get_destination(), gosub_exec(), load_config(), log_exec(), mgcp_ss(), park_add_hints(), park_call_exec(), phone_check_exception(), realtime_switch_common(), show_dialplan_helper(), skinny_answer(), skinny_indicate(), skinny_ss(), speech_background(), ss_thread(), transmit_state_notify(), try_calling(), vm_authenticate(), vmauthenticate(), and wait_for_answer().

#define AST_MAX_FDS   8

Definition at line 123 of file channel.h.

Referenced by ast_channel_alloc(), ast_do_masquerade(), ast_waitfor_nandfds(), do_parking_thread(), and update_features().

#define AST_TIMING_FD   (AST_MAX_FDS-2)

used for timingfd

Definition at line 129 of file channel.h.

Referenced by __ast_read(), agent_read(), ast_channel_alloc(), ast_do_masquerade(), and restore_channel().

#define CHECK_BLOCKING (  ) 

Definition at line 1349 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 121 of file channel.h.

Referenced by ast_channel_datastore_inherit(), and try_calling().

#define DEBUGCHAN_FLAG   0x80000000

Definition at line 297 of file channel.h.

Referenced by __ast_read(), ast_write(), handle_core_set_debug_channel(), handle_debugchan_deprecated(), handle_nodebugchan_deprecated(), handle_showchan(), handle_showchan_deprecated(), and serialize_showchan().

#define FRAMECOUNT_INC (  )     ( ((x) & DEBUGCHAN_FLAG) | (((x)+1) & ~DEBUGCHAN_FLAG) )

Definition at line 298 of file channel.h.

Referenced by __ast_read(), and ast_write().

#define LOAD_OH ( oh   ) 

Definition at line 548 of file channel.h.

Referenced by ast_pbx_outgoing_exten().

#define MAX_LANGUAGE   20

Max length of the language setting

Definition at line 106 of file channel.h.

#define MAX_MUSICCLASS   80

Max length of the music class setting

Definition at line 107 of file channel.h.


Typedef Documentation

typedef unsigned long long ast_group_t

Definition at line 140 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 467 of file channel.h.

00467      {
00468    /*! \brief Channels have this property if they can accept input with jitter; 
00469     *         i.e. most VoIP channels */
00470    AST_CHAN_TP_WANTSJITTER = (1 << 0),
00471    /*! \brief Channels have this property if they can create jitter; 
00472     *         i.e. most VoIP channels */
00473    AST_CHAN_TP_CREATESJITTER = (1 << 1),
00474 };

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_WHISPER  This channel is being whispered on
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_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

Definition at line 477 of file channel.h.

00477      {
00478    /*! Queue incoming dtmf, to be released when this flag is turned off */
00479    AST_FLAG_DEFER_DTMF =    (1 << 1),
00480    /*! write should be interrupt generator */
00481    AST_FLAG_WRITE_INT =     (1 << 2),
00482    /*! a thread is blocking on this channel */
00483    AST_FLAG_BLOCKING =      (1 << 3),
00484    /*! This is a zombie channel */
00485    AST_FLAG_ZOMBIE =        (1 << 4),
00486    /*! There is an exception pending */
00487    AST_FLAG_EXCEPTION =     (1 << 5),
00488    /*! Listening to moh XXX anthm promises me this will disappear XXX */
00489    AST_FLAG_MOH =           (1 << 6),
00490    /*! This channel is spying on another channel */
00491    AST_FLAG_SPYING =        (1 << 7),
00492    /*! This channel is in a native bridge */
00493    AST_FLAG_NBRIDGE =       (1 << 8),
00494    /*! the channel is in an auto-incrementing dialplan processor,
00495     *  so when ->priority is set, it will get incremented before
00496     *  finding the next priority to run */
00497    AST_FLAG_IN_AUTOLOOP =   (1 << 9),
00498    /*! This is an outgoing call */
00499    AST_FLAG_OUTGOING =      (1 << 10),
00500    /*! This channel is being whispered on */
00501    AST_FLAG_WHISPER =       (1 << 11),
00502    /*! A DTMF_BEGIN frame has been read from this channel, but not yet an END */
00503    AST_FLAG_IN_DTMF =       (1 << 12),
00504    /*! A DTMF_END was received when not IN_DTMF, so the length of the digit is 
00505     *  currently being emulated */
00506    AST_FLAG_EMULATE_DTMF =  (1 << 13),
00507    /*! This is set to tell the channel not to generate DTMF begin frames, and
00508     *  to instead only generate END frames. */
00509    AST_FLAG_END_DTMF_ONLY