Sat Nov 1 06:28:53 2008

Asterisk developer's documentation

channels

chan_h323.c File Reference

This file is part of the chan_h323 driver for Asterisk. More...

#include "asterisk.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <unistd.h>
#include <stdlib.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "asterisk/lock.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/musiconhold.h"
#include "asterisk/pbx.h"
#include "asterisk/options.h"
#include "asterisk/utils.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/cli.h"
#include "asterisk/dsp.h"
#include "asterisk/causes.h"
#include "asterisk/stringfields.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/astobj.h"
#include "h323/chan_h323.h"

Include dependency graph for chan_h323.c:

Go to the source code of this file.

Data Structures

struct  ast_alias_list
struct  ast_peer_list
 The peer list: Peers and Friends. More...
struct  ast_user_list
 The user list: Users and friends. More...
struct  oh323_pvt
struct  rtpPayloadType
 Structure representing a RTP session.The value of each payload format mapping:. More...

Defines

#define DEPRECATED(_v, _new_opt)   ast_log(LOG_WARNING, "Option %s found at line %d has beed deprecated. Use %s instead.\n", (_v)->name, (_v)->lineno, (_new_opt))
#define GLOBAL_CAPABILITY   (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_H261)

Functions

static void __oh323_destroy (struct oh323_pvt *pvt)
static struct ast_channel * __oh323_new (struct oh323_pvt *pvt, int state, const char *host)
static int __oh323_rtp_create (struct oh323_pvt *pvt)
static void __oh323_update_info (struct ast_channel *c, struct oh323_pvt *pvt)
static int answer_call (unsigned call_reference, const char *token)
 AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT,"The NuFone Network's OpenH323 Channel Driver",.load=load_module,.unload=unload_module,.reload=reload,)
 AST_MUTEX_DEFINE_STATIC (h323_reload_lock)
 AST_MUTEX_DEFINE_STATIC (caplock)
 AST_MUTEX_DEFINE_STATIC (monlock)
 AST_MUTEX_DEFINE_STATIC (iflock)
static struct oh323_alias * build_alias (const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
static struct oh323_peer * build_peer (const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
static struct oh323_user * build_user (char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
static void chan_ringing (unsigned call_reference, const char *token)
static void cleanup_call_details (call_details_t *cd)
static void cleanup_connection (unsigned call_reference, const char *call_token)
static void connection_made (unsigned call_reference, const char *token)
static char * convertcap (int cap)
static int create_addr (struct oh323_pvt *pvt, char *opeer)
static void delete_aliases (void)
static void delete_users (void)
static void * do_monitor (void *data)
static struct rtp_info * external_rtp_create (unsigned call_reference, const char *token)
static struct oh323_alias * find_alias (const char *source_aliases, int realtime)
static struct oh323_pvt * find_call_locked (int call_reference, const char *token)
static struct oh323_peer * find_peer (const char *peer, struct sockaddr_in *sin, int realtime)
static struct oh323_user * find_user (const call_details_t *cd, int realtime)
static int h323_do_debug (int fd, int argc, char *argv[])
static int h323_do_reload (void)
static int h323_do_trace (int fd, int argc, char *argv[])
static int h323_ep_hangup (int fd, int argc, char *argv[])
static int h323_gk_cycle (int fd, int argc, char *argv[])
static int h323_no_debug (int fd, int argc, char *argv[])
static int h323_no_trace (int fd, int argc, char *argv[])
static int h323_reload (int fd, int argc, char *argv[])
static int h323_tokens_show (int fd, int argc, char *argv[])
static void hangup_connection (unsigned int call_reference, const char *token, int cause)
static enum ast_module_load_result load_module (void)
static int oh323_addrcmp (struct sockaddr_in addr, struct sockaddr_in *sin)
static int oh323_addrcmp_str (struct in_addr inaddr, char *addr)
static struct oh323_pvt * oh323_alloc (int callid)
static int oh323_answer (struct ast_channel *c)
static int oh323_call (struct ast_channel *c, char *dest, int timeout)
static void oh323_destroy (struct oh323_pvt *pvt)
static void oh323_destroy_alias (struct oh323_alias *alias)
static void oh323_destroy_peer (struct oh323_peer *peer)
static void oh323_destroy_user (struct oh323_user *user)
static int oh323_digit_begin (struct ast_channel *c, char digit)
static int oh323_digit_end (struct ast_channel *c, char digit, unsigned int duration)
static int oh323_fixup (struct ast_channel *oldchan, struct ast_channel *newchan)
static enum ast_rtp_get_result oh323_get_rtp_peer (struct ast_channel *chan, struct ast_rtp **rtp)
static enum ast_rtp_get_result oh323_get_vrtp_peer (struct ast_channel *chan, struct ast_rtp **rtp)
static int oh323_hangup (struct ast_channel *c)
static int oh323_indicate (struct ast_channel *c, int condition, const void *data, size_t datalen)
static struct ast_frame * oh323_read (struct ast_channel *c)
static struct ast_channel * oh323_request (const char *type, int format, void *data, int *cause)
static struct ast_frame * oh323_rtp_read (struct oh323_pvt *pvt)
static int oh323_set_rtp_peer (struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
static int oh323_simulate_dtmf_end (const void *data)
static void oh323_update_info (struct ast_channel *c)
static int oh323_write (struct ast_channel *c, struct ast_frame *frame)
static int progress (unsigned call_reference, const char *token, int inband)
static void prune_peers (void)
static struct oh323_alias * realtime_alias (const char *alias)
static struct oh323_peer * realtime_peer (const char *peername, struct sockaddr_in *sin)
static struct oh323_user * realtime_user (const call_details_t *cd)
static int receive_digit (unsigned call_reference, char digit, const char *token, int duration)
static const char * redirectingreason2str (int redirectingreason)
static int reload (void)
static int reload_config (int is_reload)
static int restart_monitor (void)
static void set_dtmf_payload (unsigned call_reference, const char *token, int payload)
static void set_local_capabilities (unsigned call_reference, const char *token)
static void set_peer_capabilities (unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
static call_options_t * setup_incoming_call (call_details_t *cd)
static int setup_outgoing_call (call_details_t *cd)
static void setup_rtp_connection (unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
static int unload_module (void)
static int update_common_options (struct ast_variable *v, struct call_options *options)
static int update_state (struct oh323_pvt *pvt, int state, int signal)

Variables

static int acceptAnonymous = 1
static struct ast_alias_list aliasl
static struct sockaddr_in bindaddr
static struct ast_cli_entry cli_h323 []
static struct ast_cli_entry cli_h323_debug_deprecated
static struct ast_cli_entry cli_h323_gk_cycle_deprecated
static struct ast_cli_entry cli_h323_no_debug_deprecated
static struct ast_cli_entry cli_h323_no_trace_deprecated
static struct ast_cli_entry cli_h323_reload
static struct ast_cli_entry cli_h323_trace_deprecated
static const char config [] = "h323.conf"
static char debug_usage []
static char default_context [AST_MAX_CONTEXT] = "default"
static struct ast_jb_conf default_jbconf
static char gatekeeper [100]
static int gatekeeper_disable = 1
static int gatekeeper_discover = 0
static int gkroute = 0
static struct ast_jb_conf global_jbconf
static call_options_t global_options
static char h323_reload_usage []
static int h323_reloading = 0
static int h323_signalling_port = 1720
int h323debug
oh323_pvt * iflist
static struct io_context * io
static pthread_t monitor_thread = AST_PTHREADT_NULL
static char no_debug_usage []
static char no_trace_usage []
static struct ast_rtp_protocol oh323_rtp
static struct ast_channel_tech oh323_tech
answer_call_cb on_answer_call
chan_ringing_cb on_chan_ringing
clear_con_cb on_connection_cleared
con_established_cb on_connection_established
on_rtp_cb on_external_rtp_create
hangup_cb on_hangup
setup_incoming_cb on_incoming_call
setup_outbound_cb on_outgoing_call
progress_cb on_progress
receive_digit_cb on_receive_digit
rfc2833_cb on_set_rfc2833_payload
setcapabilities_cb on_setcapabilities
setpeercapabilities_cb on_setpeercapabilities
start_rtp_cb on_start_rtp_channel
static struct ast_peer_list peerl
static struct sched_context * sched
static char secret [50]
static char show_cycle_usage []
static char show_hangup_usage []
static char show_tokens_usage []
static const char tdesc [] = "The NuFone Network's Open H.323 Channel Driver"
static int tos = 0
static char trace_usage []
static unsigned int unique = 0
static int userbyalias = 1
static struct ast_user_list userl

Detailed Description

This file is part of the chan_h323 driver for Asterisk.

Author:
Jeremy McNamara
See also

Definition in file chan_h323.c.

Define Documentation

#define DEPRECATED ( _v,
_new_opt   )     ast_log(LOG_WARNING, "Option %s found at line %d has beed deprecated. Use %s instead.\n", (_v)->name, (_v)->lineno, (_new_opt))

Definition at line 1250 of file chan_h323.c.

Referenced by update_common_options().

#define GLOBAL_CAPABILITY   (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_H261)

Definition at line 141 of file chan_h323.c.

Referenced by reload_config().

Function Documentation

static void __oh323_destroy ( struct oh323_pvt *  pvt  )  [static]

Definition at line 450 of file chan_h323.c.

References ast_channel_lock, ast_channel_unlock, ast_dsp_free(), ast_log(), ast_mutex_destroy(), ast_mutex_unlock(), ast_rtp_destroy(), AST_SCHED_DEL, oh323_pvt::cd, cleanup_call_details(), oh323_pvt::DTMFsched, free, iflist, oh323_pvt::lock, LOG_DEBUG, LOG_WARNING, oh323_pvt::next, oh323_pvt::owner, oh323_pvt::rtp, sched, ast_channel::tech_pvt, and oh323_pvt::vad.

Referenced by do_monitor(), and oh323_destroy().

00451 {
00452    struct oh323_pvt *cur, *prev = NULL;
00453 
00454    AST_SCHED_DEL(sched, pvt->DTMFsched);
00455 
00456    if (pvt->rtp) {
00457       ast_rtp_destroy(pvt->rtp);
00458    }
00459 
00460    /* Free dsp used for in-band DTMF detection */
00461    if (pvt->vad) {
00462       ast_dsp_free(pvt->vad);
00463    }
00464    cleanup_call_details(&pvt->cd);
00465 
00466    /* Unlink us from the owner if we have one */
00467    if (pvt->owner) {
00468       ast_channel_lock(pvt->owner);
00469       if (h323debug)
00470          ast_log(LOG_DEBUG, "Detaching from %s\n", pvt->owner->name);
00471       pvt->owner->tech_pvt = NULL;
00472       ast_channel_unlock(pvt->owner);
00473    }
00474    cur = iflist;
00475    while(cur) {
00476       if (cur == pvt) {
00477          if (prev)
00478             prev->next = cur->next;
00479          else
00480             iflist = cur->next;
00481          break;
00482       }
00483       prev = cur;
00484       cur = cur->next;
00485    }
00486    if (!cur) {
00487       ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
00488    } else {
00489       ast_mutex_unlock(&pvt->lock);
00490       ast_mutex_destroy(&pvt->lock);
00491       free(pvt);
00492    }
00493 }

static struct ast_channel* __oh323_new ( struct oh323_pvt *  pvt,
int  state,
const char *  host 
) [static]

Definition at line 999 of file chan_h323.c.

References accountcode, oh323_pvt::accountcode, ast_channel::amaflags, oh323_pvt::amaflags, ast_best_codec(), ast_channel_alloc(), ast_codec_choose(), ast_dsp_new(), ast_dsp_set_features(), ast_hangup(), ast_log(), ast_module_ref(), ast_mutex_lock(), ast_mutex_unlock(), ast_pbx_start(), ast_rtcp_fd(), ast_rtp_fd(), AST_STATE_DOWN, AST_STATE_RING, ast_strdup, ast_string_field_set, ast_strlen_zero(), ast_udptl_fd(), oh323_pvt::cd, ast_channel::cid, ast_callerid::cid_ani, ast_callerid::cid_dnid, cid_name, cid_num, ast_callerid::cid_pres, ast_callerid::cid_rdnis, ast_callerid::cid_ton, ast_channel::context, oh323_pvt::context, DSP_FEATURE_DTMF_DETECT, ast_channel::exten, oh323_pvt::exten, ast_channel::fds, fmt, oh323_pvt::jointcapability, oh323_pvt::lock, LOG_WARNING, oh323_pvt::nativeformats, ast_channel::nativeformats, oh323_tech, oh323_pvt::options, oh323_pvt::owner, pbx_builtin_setvar_helper(), ast_channel::priority, ast_channel::rawreadformat, ast_channel::rawwriteformat, ast_channel::readformat, redirectingreason2str(), ast_channel::rings, oh323_pvt::rtp, strdup, ast_channel::tech, ast_channel::tech_pvt, ast_channel::transfercapability, oh323_pvt::vad, and ast_channel::writeformat.

Referenced by answer_call(), and oh323_request().

01000 {
01001    struct ast_channel *ch;
01002    char *cid_num, *cid_name;
01003    int fmt;
01004 
01005    if (!ast_strlen_zero(pvt->options.cid_num))
01006       cid_num = pvt->options.cid_num;
01007    else
01008       cid_num = pvt->cd.call_source_e164;
01009 
01010    if (!ast_strlen_zero(pvt->options.cid_name))
01011       cid_name = pvt->options.cid_name;
01012    else
01013       cid_name = pvt->cd.call_source_name;
01014    
01015    /* Don't hold a oh323_pvt lock while we allocate a chanel */
01016    ast_mutex_unlock(&pvt->lock);
01017    ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, pvt->amaflags, "H323/%s", host);
01018    /* Update usage counter */
01019    ast_module_ref(ast_module_info->self);
01020    ast_mutex_lock(&pvt->lock);
01021    if (ch) {
01022       ch->tech = &oh323_tech;
01023       if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
01024          fmt = global_options.capability;
01025       ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
01026       pvt->nativeformats = ch->nativeformats;
01027       fmt = ast_best_codec(ch->nativeformats);
01028       ch->writeformat = fmt;
01029       ch->rawwriteformat = fmt;
01030       ch->readformat = fmt;
01031       ch->rawreadformat = fmt;
01032 #if 0
01033       ch->fds[0] = ast_rtp_fd(pvt->rtp);
01034       ch->fds[1] = ast_rtcp_fd(pvt->rtp);
01035 #endif
01036 #ifdef VIDEO_SUPPORT
01037       if (pvt->vrtp) {
01038          ch->fds[2] = ast_rtp_fd(pvt->vrtp);
01039          ch->fds[3] = ast_rtcp_fd(pvt->vrtp);
01040       }
01041 #endif
01042 #ifdef T38_SUPPORT
01043       if (pvt->udptl) {
01044          ch->fds[4] = ast_udptl_fd(pvt->udptl);
01045       }
01046 #endif
01047       if (state == AST_STATE_RING) {
01048          ch->rings = 1;
01049       }
01050       /* Allocate dsp for in-band DTMF support */
01051       if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
01052          pvt->vad = ast_dsp_new();
01053          ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
01054       }
01055       /* Register channel functions. */
01056       ch->tech_pvt = pvt;
01057       /* Set the owner of this channel */
01058       pvt->owner = ch;
01059 
01060       ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
01061       ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
01062       ch->priority = 1;
01063       if (!ast_strlen_zero(pvt->accountcode)) {
01064          ast_string_field_set(ch, accountcode, pvt->accountcode);
01065       }
01066       if (pvt->amaflags) {
01067          ch->amaflags = pvt->amaflags;
01068       }
01069 
01070       /* Don't use ast_set_callerid() here because it will
01071        * generate a needless NewCallerID event */
01072       ch->cid.cid_ani = ast_strdup(cid_num);
01073 
01074       if (pvt->cd.redirect_reason >= 0) {
01075          ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number);
01076          pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
01077       }
01078       ch->cid.cid_pres = pvt->cd.presentation;
01079       ch->cid.cid_ton = pvt->cd.type_of_number;
01080 
01081       if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
01082          ch->cid.cid_dnid = strdup(pvt->exten);
01083       }
01084       if (pvt->cd.transfer_capability >= 0)
01085          ch->transfercapability = pvt->cd.transfer_capability;
01086       if (state != AST_STATE_DOWN) {
01087          if (ast_pbx_start(ch)) {
01088             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
01089             ast_hangup(ch);
01090             ch = NULL;
01091          }
01092       }
01093    } else {
01094       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
01095    }
01096    return ch;
01097 }

static int __oh323_rtp_create ( struct oh323_pvt *  pvt  )  [static]

Definition at line 953 of file chan_h323.c.

References ast_channel_trylock, ast_channel_unlock, ast_find_ourip(), ast_jb_configure(), ast_log(), ast_mutex_unlock(), ast_null_frame, ast_queue_frame(), ast_rtcp_fd(), ast_rtp_codec_setpref(), ast_rtp_fd(), ast_rtp_new_with_bindaddr(), ast_rtp_set_rtpmap_type(), ast_rtp_setnat(), ast_rtp_settos(), oh323_pvt::dtmf_pt, errno, ast_channel::fds, global_jbconf, io, oh323_pvt::lock, LOG_DEBUG, LOG_ERROR, LOG_WARNING, oh323_pvt::options, oh323_pvt::owner, oh323_pvt::peer_prefs, oh323_pvt::peercapability, oh323_pvt::rtp, sched, and oh323_pvt::update_rtp_info.

Referenced by external_rtp_create(), and setup_rtp_connection().

00954 {
00955    struct in_addr our_addr;
00956 
00957    if (pvt->rtp)
00958       return 0;
00959 
00960    if (ast_find_ourip(&our_addr, bindaddr)) {
00961       ast_mutex_unlock(&pvt->lock);
00962       ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
00963       return -1;
00964    }
00965    pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr);
00966    if (!pvt->rtp) {
00967       ast_mutex_unlock(&pvt->lock);
00968       ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
00969       return -1;
00970    }
00971    if (h323debug)
00972       ast_log(LOG_DEBUG, "Created RTP channel\n");
00973 
00974    ast_rtp_settos(pvt->rtp, tos);
00975 
00976    if (h323debug)
00977       ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->options.nat);
00978    ast_rtp_setnat(pvt->rtp, pvt->options.nat);
00979 
00980    if (pvt->dtmf_pt > 0)
00981       ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt, "audio", "telephone-event", 0);
00982 
00983    if (pvt->peercapability)
00984       ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
00985 
00986    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
00987       ast_jb_configure(pvt->owner, &global_jbconf);
00988       pvt->owner->fds[0] = ast_rtp_fd(pvt->rtp);
00989       pvt->owner->fds[1] = ast_rtcp_fd(pvt->rtp);
00990       ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00991       ast_channel_unlock(pvt->owner);
00992    } else
00993       pvt->update_rtp_info = 1;
00994 
00995    return 0;
00996 }

static void __oh323_update_info ( struct ast_channel *  c,
struct oh323_pvt *  pvt 
) [static]

Definition at line 339 of file chan_h323.c.

References ast_channel::_softhangup, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, ast_jb_configure(), ast_log(), ast_null_frame, ast_queue_control(), ast_queue_frame(), ast_queue_hangup(), ast_rtcp_fd(), ast_rtp_fd(), ast_sched_add(), AST_SCHED_DEL, ast_set_read_format(), ast_set_write_format(), ast_setstate(), AST_SOFTHANGUP_DEV, oh323_pvt::curDTMF, oh323_pvt::DTMFsched, f, ast_channel::fds, global_jbconf, oh323_pvt::hangupcause, ast_channel::hangupcause, LOG_DEBUG, LOG_DTMF, oh323_pvt::nativeformats, ast_channel::nativeformats, oh323_pvt::needhangup, oh323_pvt::newcontrol, oh323_pvt::newdigit, oh323_pvt::newduration, oh323_pvt::newstate, oh323_simulate_dtmf_end(), oh323_pvt::owner, ast_channel::readformat, oh323_pvt::rtp, sched, oh323_pvt::update_rtp_info, and ast_channel::writeformat.

Referenced by oh323_read(), oh323_update_info(), and oh323_write().

00340 {
00341    if (c->nativeformats != pvt->nativeformats) {
00342       if (h323debug)
00343          ast_log(LOG_DEBUG, "Preparing %s for new native format\n", c->name);
00344       c->nativeformats = pvt->nativeformats;
00345       ast_set_read_format(c, c->readformat);
00346       ast_set_write_format(c, c->writeformat);
00347    }
00348    if (pvt->needhangup) {
00349       if (h323debug)
00350          ast_log(LOG_DEBUG, "Process pending hangup for %s\n", c->name);
00351       c->_softhangup |= AST_SOFTHANGUP_DEV;
00352       c->hangupcause = pvt->hangupcause;
00353       ast_queue_hangup(c);
00354       pvt->needhangup = 0;
00355       pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
00356    }
00357    if (pvt->newstate >= 0) {
00358       ast_setstate(c, pvt->newstate);
00359       pvt->newstate = -1;
00360    }
00361    if (pvt->newcontrol >= 0) {
00362       ast_queue_control(c, pvt->newcontrol);
00363       pvt->newcontrol = -1;
00364    }
00365    if (pvt->newdigit >= 0) {
00366       struct ast_frame f = {
00367          .frametype = AST_FRAME_DTMF_END,
00368          .subclass = pvt->newdigit,
00369          .samples = pvt->newduration * 8,
00370          .len = pvt->newduration,
00371          .src = "UPDATE_INFO",
00372       };
00373       if (pvt->newdigit == ' ') {      /* signalUpdate message */
00374          f.subclass = pvt->curDTMF;
00375          if (pvt->DTMFsched >= 0) {
00376             AST_SCHED_DEL(sched, pvt->DTMFsched);
00377          }
00378       } else {                /* Regular input or signal message */
00379          if (pvt->newduration) {    /* This is a signal, signalUpdate follows */
00380             f.frametype = AST_FRAME_DTMF_BEGIN;
00381             AST_SCHED_DEL(sched, pvt->DTMFsched);
00382             pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
00383             if (h323debug)
00384                ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
00385          }
00386          pvt->curDTMF = pvt->newdigit;
00387       }
00388       ast_queue_frame(c, &f);
00389       pvt->newdigit = -1;
00390    }
00391    if (pvt->update_rtp_info > 0) {
00392       if (pvt->rtp) {
00393          ast_jb_configure(c, &global_jbconf);
00394          c->fds[0] = ast_rtp_fd(pvt->rtp);
00395          c->fds[1] = ast_rtcp_fd(pvt->rtp);
00396          ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00397       }
00398       pvt->update_rtp_info = -1;
00399    }
00400 }

static int answer_call ( unsigned  call_reference,
const char *  token 
) [static]

Call-back function to start PBX when OpenH323 ready to serve incoming call

Returns 1 on success

Definition at line 2173 of file chan_h323.c.

References __oh323_new(), AST_CAUSE_UNALLOCATED, ast_exists_extension(), ast_log(), ast_mutex_unlock(), AST_STATE_RINGING, oh323_pvt::cd, oh323_pvt::context, oh323_pvt::exten, find_call_locked(), h323debug, oh323_pvt::lock, LOG_DEBUG, LOG_ERROR, and LOG_NOTICE.

Referenced by load_module().

02174 {
02175    struct oh323_pvt *pvt;
02176    struct ast_channel *c = NULL;
02177    enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
02178    char tmp_exten[sizeof(pvt->exten)];
02179 
02180    if (h323debug)
02181       ast_log(LOG_DEBUG, "Preparing Asterisk to answer for %s\n", token);
02182 
02183    /* Find the call or allocate a private structure if call not found */
02184    pvt = find_call_locked(call_reference, token);
02185    if (!pvt) {
02186       ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
02187       return 0;
02188    }
02189    /* Check if requested extension@context pair exists in the dialplan */
02190    ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
02191 
02192    /* Try to find best extension in specified context */
02193    if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
02194       if (tmp_exten[0] == 's')
02195          try_exten = ext_s;
02196       else if (tmp_exten[0] == 'i')
02197          try_exten = ext_i;
02198       else
02199          try_exten = ext_original;
02200    } else
02201       try_exten = ext_original;
02202    do {
02203       if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
02204          break;
02205       switch (try_exten) {
02206       case ext_original:
02207          tmp_exten[0] = 's';
02208          tmp_exten[1] = '\0';
02209          try_exten = ext_s;
02210          break;
02211       case ext_s:
02212          tmp_exten[0] = 'i';
02213          try_exten = ext_i;
02214          break;
02215       case ext_i:
02216          try_exten = ext_notexists;
02217          break;
02218       default:
02219          break;
02220       }
02221    } while (try_exten != ext_notexists);
02222 
02223    /* Drop the call if we don't have <exten>, s and i extensions */
02224    if (try_exten == ext_notexists) {
02225       ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
02226       ast_mutex_unlock(&pvt->lock);
02227       h323_clear_call(token, AST_CAUSE_UNALLOCATED);
02228       return 0;
02229    } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
02230       if (h323debug)
02231          ast_log(LOG_DEBUG, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
02232       ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
02233    }
02234 
02235    /* allocate a channel and tell asterisk about it */
02236    c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
02237 
02238    /* And release when done */
02239    ast_mutex_unlock(&pvt->lock);
02240    if (!c) {
02241       ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
02242       return 0;
02243    }
02244    return 1;
02245 }

AST_MODULE_INFO ( ASTERISK_GPL_KEY  ,
AST_MODFLAG_DEFAULT  ,
"The NuFone Network's OpenH323 Channel Driver"  ,
.  load = load_module,
.  unload = unload_module,
.  reload = reload 
)

AST_MUTEX_DEFINE_STATIC ( h323_reload_lock   ) 

AST_MUTEX_DEFINE_STATIC ( caplock   ) 

AST_MUTEX_DEFINE_STATIC ( monlock   ) 

AST_MUTEX_DEFINE_STATIC ( iflock   ) 

Protect the interface list (oh323_pvt)

static struct oh323_alias* build_alias ( const char *  name,
struct ast_variable *  v,
struct ast_variable *  alt,
int  realtime 
) [static]

Definition at line 1190 of file chan_h323.c.

References aliasl, ast_log(), ASTOBJ_CONTAINER_FIND_UNLINK_FULL, ASTOBJ_INIT, ASTOBJ_UNMARK, calloc, LOG_WARNING, ast_variable::name, ast_variable::next, and ast_variable::value.

01191 {
01192    struct oh323_alias *alias;
01193    int found = 0;
01194 
01195    alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
01196 
01197    if (alias)
01198       found++;
01199    else {
01200       if (!(alias = (struct oh323_alias *)calloc(1, sizeof(*alias))))
01201          return NULL;
01202       ASTOBJ_INIT(alias);
01203    }
01204    if (!found && name)
01205       ast_copy_string(alias->name, name, sizeof(alias->name));
01206    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01207       if (!strcasecmp(v->name, "e164")) {
01208          ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
01209       } else if (!strcasecmp(v->name, "prefix")) {
01210          ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
01211       } else if (!strcasecmp(v->name, "context")) {
01212          ast_copy_string(alias->context, v->value, sizeof(alias->context));
01213       } else if (!strcasecmp(v->name, "secret")) {
01214          ast_copy_string(alias->secret, v->