/* * chan_h323.c * * OpenH323 Channel Driver for ASTERISK PBX. * By Jeremy McNamara * For The NuFone Network * * This code has been derived from code created by * Michael Manousos and Mark Spencer * * This file is part of the chan_h323 driver for Asterisk * * chan_h323 is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * chan_h323 is distributed WITHOUT ANY WARRANTY; without even * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Version Info: $Id$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __OpenBSD__ #include #ifndef IPTOS_MINCOST #define IPTOS_MINCOST 0x02 #endif #endif #include #include "h323/chan_h323.h" /** String variables required by ASTERISK */ static char *type = "H323"; static char *desc = "The NuFone Network's Open H.323 Channel Driver"; static char *tdesc = "The NuFone Network's Open H.323 Channel Driver"; static char *config = "h323.conf"; static char default_context[AST_MAX_EXTENSION]; /** H.323 configuration values */ static char gatekeeper[100]; static int gatekeeper_disable = 1; static int gatekeeper_discover = 0; static int usingGk; static int port = 1720; static int gkroute = 0; /* to find user by alias is default, alternative is the incomming call's source IP address*/ static int userbyalias = 1; static int bridge_default = 1; /* Just about everybody seems to support ulaw, so make it a nice default */ static int capability = AST_FORMAT_ULAW; /* TOS flag */ static int tos = 0; static int dtmfmode = H323_DTMF_RFC2833; static char secret[50]; /** Private structure of a OpenH323 channel */ struct oh323_pvt { ast_mutex_t lock; /* Channel private lock */ call_options_t calloptions; /* Options to be used during call setup */ int alreadygone; /* Whether or not we've already been destroyed by our peer */ int needdestroy; /* if we need to be destroyed */ call_details_t cd; /* Call details */ struct ast_channel *owner; /* Who owns us */ int capability; /* audio capability */ int nonCodecCapability; /* non-audio capability */ int outgoing; /* Outgoing or incoming call? */ int nat; /* Are we talking to a NAT EP?*/ int bridge; /* Determine of we should native bridge or not*/ char exten[AST_MAX_EXTENSION]; /* Requested extension */ char context[AST_MAX_EXTENSION]; /* Context where to start */ char username[81]; /* H.323 alias using this channel */ char accountcode[256]; /* Account code */ int amaflags; /* AMA Flags */ char callerid[80]; /* Caller*ID if available */ struct ast_rtp *rtp; /* RTP Session */ int dtmfmode; /* What DTMF Mode is being used */ struct ast_dsp *vad; /* Used for in-band DTMF detection */ struct oh323_pvt *next; /* Next channel in list */ } *iflist = NULL; static struct ast_user_list { struct oh323_user *users; ast_mutex_t lock; } userl = { NULL, AST_MUTEX_INITIALIZER }; static struct ast_peer_list { struct oh323_peer *peers; ast_mutex_t lock; } peerl = { NULL, AST_MUTEX_INITIALIZER }; static struct ast_alias_list { struct oh323_alias *aliases; ast_mutex_t lock; } aliasl = { NULL, AST_MUTEX_INITIALIZER }; /** Asterisk RTP stuff*/ static struct sched_context *sched; static struct io_context *io; /** Protect the interface list (of oh323_pvt's) */ static ast_mutex_t iflock = AST_MUTEX_INITIALIZER; /** Usage counter and associated lock */ static int usecnt =0; static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER; /* Protect the monitoring thread, so only one process can kill or start it, and not when it's doing something critical. */ static ast_mutex_t monlock = AST_MUTEX_INITIALIZER; /* This is the thread for the monitor which checks for input on the channels which are not currently in use. */ static pthread_t monitor_thread = AST_PTHREADT_NULL; static int restart_monitor(void); static void __oh323_destroy(struct oh323_pvt *p) { struct oh323_pvt *cur, *prev = NULL; if (p->rtp) { ast_rtp_destroy(p->rtp); } /* Unlink us from the owner if we have one */ if (p->owner) { ast_mutex_lock(&p->owner->lock); ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name); p->owner->pvt->pvt = NULL; ast_mutex_unlock(&p->owner->lock); } cur = iflist; while(cur) { if (cur == p) { if (prev) prev->next = cur->next; else iflist = cur->next; break; } prev = cur; cur = cur->next; } if (!cur) { ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur); } else free(p); } static void oh323_destroy(struct oh323_pvt *p) { ast_mutex_lock(&iflock); __oh323_destroy(p); ast_mutex_unlock(&iflock); } static struct oh323_alias *build_alias(char *name, struct ast_variable *v) { struct oh323_alias *alias; alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias)); if (alias) { memset(alias, 0, sizeof(struct oh323_alias)); strncpy(alias->name, name, sizeof(alias->name)-1); while (v) { if (!strcasecmp(v->name, "e164")) { strncpy(alias->e164, v->value, sizeof(alias->e164)-1); } else if (!strcasecmp(v->name, "prefix")) { strncpy(alias->prefix, v->value, sizeof(alias->prefix)-1); } else if (!strcasecmp(v->name, "context")) { strncpy(alias->context, v->value, sizeof(alias->context)-1); } else if (!strcasecmp(v->name, "secret")) { strncpy(alias->secret, v->value, sizeof(alias->secret)-1); } else { if (strcasecmp(v->value, "h323")) { ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->value); } } v = v->next; } } return alias; } static struct oh323_user *build_user(char *name, struct ast_variable *v) { struct oh323_user *user; int format; user = (struct oh323_user *)malloc(sizeof(struct oh323_user)); if (user) { memset(user, 0, sizeof(struct oh323_user)); strncpy(user->name, name, sizeof(user->name)-1); /* set the usage flag to a sane starting value*/ user->inUse = 0; /* Assume we can native bridge */ user->bridge = bridge_default; while(v) { if (!strcasecmp(v->name, "context")) { strncpy(user->context, v->value, sizeof(user->context)-1); } else if (!strcasecmp(v->name, "bridge")) { user->bridge = ast_true(v->value); } else if (!strcasecmp(v->name, "nat")) { user->nat = ast_true(v->value); } else if (!strcasecmp(v->name, "noFastStart")) { user->noFastStart = ast_true(v->value); } else if (!strcasecmp(v->name, "noH245Tunneling")) { user->noH245Tunneling = ast_true(v->value); } else if (!strcasecmp(v->name, "noSilenceSuppression")) { user->noSilenceSuppression = ast_true(v->value); } else if (!strcasecmp(v->name, "secret")) { strncpy(user->secret, v->value, sizeof(user->secret)-1); } else if (!strcasecmp(v->name, "callerid")) { strncpy(user->callerid, v->value, sizeof(user->callerid)-1); } else if (!strcasecmp(v->name, "accountcode")) { strncpy(user->accountcode, v->value, sizeof(user->accountcode)-1); } else if (!strcasecmp(v->name, "incominglimit")) { user->incominglimit = atoi(v->value); if (user->incominglimit < 0) user->incominglimit = 0; } else if (!strcasecmp(v->name, "host")) { if (!strcasecmp(v->value, "dynamic")) { ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n"); free(user); return NULL; } else if (ast_get_ip(&user->addr, v->value)) { free(user); return NULL; } /* Let us know we need to use ip authentication */ user->host = 1; } else if (!strcasecmp(v->name, "amaflags")) { format = ast_cdr_amaflags2int(v->value); if (format < 0) { ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno); } else { user->amaflags = format; } } v = v->next; } } return user; } static struct oh323_peer *build_peer(char *name, struct ast_variable *v) { struct oh323_peer *peer; struct oh323_peer *prev; int found=0; prev = NULL; ast_mutex_lock(&peerl.lock); peer = peerl.peers; while(peer) { if (!strcasecmp(peer->name, name)) { break; } prev = peer; peer = peer->next; } if (peer) { found++; /* Already in the list, remove it and it will be added back (or FREE'd) */ if (prev) { prev->next = peer->next; } else { peerl.peers = peer->next; } ast_mutex_unlock(&peerl.lock); } else { ast_mutex_unlock(&peerl.lock); peer = malloc(sizeof(struct oh323_peer)); memset(peer, 0, sizeof(struct oh323_peer)); } if (peer) { if (!found) { strncpy(peer->name, name, sizeof(peer->name)-1); } /* set the usage flag to a sane starting value*/ peer->inUse = 0; while(v) { if (!strcasecmp(v->name, "context")) { strncpy(peer->context, v->value, sizeof(peer->context)-1); } else if (!strcasecmp(v->name, "bridge")) { peer->bridge = ast_true(v->value); } else if (!strcasecmp(v->name, "noFastStart")) { peer->noFastStart = ast_true(v->value); } else if (!strcasecmp(v->name, "noH245Tunneling")) { peer->noH245Tunneling = ast_true(v->value); } else if (!strcasecmp(v->name, "noSilenceSuppression")) { peer->noSilenceSuppression = ast_true(v->value); } else if (!strcasecmp(v->name, "outgoinglimit")) { peer->outgoinglimit = atoi(v->value); if (peer->outgoinglimit > 0) peer->outgoinglimit = 0; } else if (!strcasecmp(v->name, "host")) { if (!strcasecmp(v->value, "dynamic")) { ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n"); free(peer); return NULL; } if (ast_get_ip(&peer->addr, v->value)) { free(peer); return NULL; } } v=v->next; } } return peer; } /** * Send (play) the specified digit to the channel. * */ static int oh323_digit(struct ast_channel *c, char digit) { struct oh323_pvt *p = c->pvt->pvt; if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) { ast_rtp_senddigit(p->rtp, digit); } /* If in-band DTMF is desired, send that */ if (p->dtmfmode & H323_DTMF_INBAND) h323_send_tone(p->cd.call_token, digit); return 0; } /** * Make a call over the specified channel to the specified * destination. This function will parse the destination string * and determine the address-number to call. * Return -1 on error, 0 on success. */ static int oh323_call(struct ast_channel *c, char *dest, int timeout) { int res; struct oh323_pvt *p = c->pvt->pvt; char called_addr[256]; char *tmp, *cid, *cidname, oldcid[256]; strtok_r(dest, "/", &(tmp)); ast_log(LOG_DEBUG, "dest=%s, timeout=%d.\n", dest, timeout); if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) { ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name); return -1; } /* outgoing call */ p->outgoing = 1; /* Clear the call token */ if ((p->cd).call_token == NULL) (p->cd).call_token = (char *)malloc(128); memset((char *)(p->cd).call_token, 0, 128); if (p->cd.call_token == NULL) { ast_log(LOG_ERROR, "Not enough memory.\n"); return -1; } /* Build the address to call */ memset(called_addr, 0, sizeof(dest)); memcpy(called_addr, dest, sizeof(called_addr)); /* Copy callerid, if there is any */ if (c->callerid) { memset(oldcid, 0, sizeof(oldcid)); memcpy(oldcid, c->callerid, strlen(c->callerid)); oldcid[sizeof(oldcid)-1] = '\0'; ast_callerid_parse(oldcid, &cidname, &cid); if (p->calloptions.callerid) { free(p->calloptions.callerid); p->calloptions.callerid = NULL; } if (p->calloptions.callername) { free(p->calloptions.callername); p->calloptions.callername = NULL; } p->calloptions.callerid = (char*)malloc(256); if (p->calloptions.callerid == NULL) { ast_log(LOG_ERROR, "Not enough memory.\n"); return(-1); } memset(p->calloptions.callerid, 0, 256); if ((cid != NULL)&&(strlen(cid) > 0)) strncpy(p->calloptions.callerid, cid, 255); p->calloptions.callername = (char*)malloc(256); if (p->calloptions.callername == NULL) { ast_log(LOG_ERROR, "Not enough memory.\n"); return(-1); } memset(p->calloptions.callername, 0, 256); if ((cidname != NULL)&&(strlen(cidname) > 0)) strncpy(p->calloptions.callername, cidname, 255); } else { if (p->calloptions.callerid) { free(p->calloptions.callerid); p->calloptions.callerid = NULL; } if (p->calloptions.callername) { free(p->calloptions.callername); p->calloptions.callername = NULL; } } res = h323_make_call(called_addr, &(p->cd), p->calloptions); if (res) { ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name); return -1; } return 0; } static int oh323_answer(struct ast_channel *c) { int res; struct oh323_pvt *p = c->pvt->pvt; res = h323_answering_call(p->cd.call_token, 0); if (c->_state != AST_STATE_UP) ast_setstate(c, AST_STATE_UP); return res; } static int oh323_hangup(struct ast_channel *c) { struct oh323_pvt *p = c->pvt->pvt; int needcancel = 0; if (h323debug) ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name); if (!c->pvt->pvt) { ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n"); return 0; } ast_mutex_lock(&p->lock); /* Determine how to disconnect */ if (p->owner != c) { ast_log(LOG_WARNING, "Huh? We aren't the owner?\n"); ast_mutex_unlock(&p->lock); return 0; } if (!c || (c->_state != AST_STATE_UP)) needcancel = 1; /* Disconnect */ p = c->pvt->pvt; /* Free dsp used for in-band DTMF detection */ if (p->vad) { ast_dsp_free(p->vad); } p->owner = NULL; c->pvt->pvt = NULL; /* Start the process if it's not already started */ if (!p->alreadygone) { if (h323_clear_call((p->cd).call_token)) { ast_log(LOG_DEBUG, "ClearCall failed.\n"); } p->needdestroy = 1; } /* Update usage counter */ ast_mutex_lock(&usecnt_lock); usecnt--; if (usecnt < 0) ast_log(LOG_WARNING, "Usecnt < 0\n"); ast_mutex_unlock(&usecnt_lock); ast_update_use_count(); ast_mutex_unlock(&p->lock); return 0; } static struct ast_frame *oh323_rtp_read(struct oh323_pvt *p) { /* Retrieve audio/etc from channel. Assumes p->lock is already held. */ struct ast_frame *f; static struct ast_frame null_frame = { AST_FRAME_NULL, }; /* Only apply it for the first packet, we just need the correct ip/port */ if(p->nat) { ast_rtp_setnat(p->rtp,p->nat); p->nat = 0; } f = ast_rtp_read(p->rtp); /* Don't send RFC2833 if we're not supposed to */ if (f && (f->frametype == AST_FRAME_DTMF) && !(p->dtmfmode & H323_DTMF_RFC2833)) return &null_frame; if (p->owner) { /* We already hold the channel lock */ if (f->frametype == AST_FRAME_VOICE) { if (f->subclass != p->owner->nativeformats) { ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass); p->owner->nativeformats = f->subclass; ast_set_read_format(p->owner, p->owner->readformat); ast_set_write_format(p->owner, p->owner->writeformat); } /* Do in-band DTMF detection */ if (p->dtmfmode & H323_DTMF_INBAND) { f = ast_dsp_process(p->owner,p->vad,f); if (f->frametype == AST_FRAME_DTMF) ast_log(LOG_DEBUG, "Got in-band digit %c.\n", f->subclass); } } } return f; } static struct ast_frame *oh323_read(struct ast_channel *c) { struct ast_frame *fr; struct oh323_pvt *p = c->pvt->pvt; ast_mutex_lock(&p->lock); fr = oh323_rtp_read(p); ast_mutex_unlock(&p->lock); return fr; } static int oh323_write(struct ast_channel *c, struct ast_frame *frame) { struct oh323_pvt *p = c->pvt->pvt; int res = 0; if (frame->frametype != AST_FRAME_VOICE) { if (frame->frametype == AST_FRAME_IMAGE) return 0; else { ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype); return 0; } } else { if (!(frame->subclass & c->nativeformats)) { ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n", frame->subclass, c->nativeformats, c->readformat, c->writeformat); return -1; } } if (p) { ast_mutex_lock(&p->lock); if (p->rtp) { res = ast_rtp_write(p->rtp, frame); } ast_mutex_unlock(&p->lock); } return res; } /** FIXME: Can I acutally use this or does Open H.323 take care of everything? */ static int oh323_indicate(struct ast_channel *c, int condition) { struct oh323_pvt *p = c->pvt->pvt; switch(condition) { case AST_CONTROL_RINGING: if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) { h323_send_alerting(p->cd.call_token); break; } return -1; case AST_CONTROL_PROGRESS: if (c->_state != AST_STATE_UP) { h323_send_progress(p->cd.call_token); break; } return -1; case AST_CONTROL_BUSY: if (c->_state != AST_STATE_UP) { h323_answering_call(p->cd.call_token, 1); p->alreadygone = 1; ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV); break; } return -1; case AST_CONTROL_CONGESTION: if (c->_state != AST_STATE_UP) { h323_answering_call(p->cd.call_token, 1); p->alreadygone = 1; ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV); break; } return -1; case -1: return -1; default: ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition); return -1; } return 0; } // FIXME: WTF is this? Do I need this??? static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan) { struct oh323_pvt *p = newchan->pvt->pvt; ast_mutex_lock(&p->lock); if (p->owner != oldchan) { ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner); return -1; } p->owner = newchan; ast_mutex_unlock(&p->lock); return 0; } static struct ast_channel *oh323_new(struct oh323_pvt *i, int state, const char *host) { struct ast_channel *ch; int fmt; ch = ast_channel_alloc(1); if (ch) { snprintf(ch->name, sizeof(ch->name)-1, "H323/%s", host); ch->nativeformats = i->capability; if (!ch->nativeformats) ch->nativeformats = capability; fmt = ast_best_codec(ch->nativeformats); ch->type = type; ch->fds[0] = ast_rtp_fd(i->rtp); if (state == AST_STATE_RING) ch->rings = 1; ch->writeformat = fmt; ch->pvt->rawwriteformat = fmt; ch->readformat = fmt; ch->pvt->rawreadformat = fmt; /* Allocate dsp for in-band DTMF support */ if (i->dtmfmode & H323_DTMF_INBAND) { i->vad = ast_dsp_new(); ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT); } /* Register the OpenH323 channel's functions. */ ch->pvt->pvt = i; ch->pvt->send_digit = oh323_digit; ch->pvt->call = oh323_call; ch->pvt->hangup = oh323_hangup; ch->pvt->answer = oh323_answer; ch->pvt->read = oh323_read; ch->pvt->write = oh323_write; ch->pvt->indicate = oh323_indicate; ch->pvt->fixup = oh323_fixup; /* ch->pvt->bridge = ast_rtp_bridge; */ /* Set the owner of this channel */ i->owner = ch; ast_mutex_lock(&usecnt_lock); usecnt++; ast_mutex_unlock(&usecnt_lock); ast_update_use_count(); strncpy(ch->context, i->context, sizeof(ch->context)-1); strncpy(ch->exten, i->exten, sizeof(ch->exten)-1); ch->priority = 1; if (!ast_strlen_zero(i->callerid)) ch->callerid = strdup(i->callerid); if (!ast_strlen_zero(i->accountcode)) strncpy(ch->accountcode, i->accountcode, sizeof(ch->accountcode)-1); if (i->amaflags) ch->amaflags = i->amaflags; ast_setstate(ch, state); if (state != AST_STATE_DOWN) { if (ast_pbx_start(ch)) { ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name); ast_hangup(ch); ch = NULL; } } } else ast_log(LOG_WARNING, "Unable to allocate channel structure\n"); return ch; } static struct oh323_pvt *oh323_alloc(int callid) { struct oh323_pvt *p; p = malloc(sizeof(struct oh323_pvt)); if (!p) { ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n"); return NULL; } /* Keep track of stuff */ memset(p, 0, sizeof(struct oh323_pvt)); p->rtp = ast_rtp_new(sched, io, 1, 0); if (!p->rtp) { ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno)); free(p); return NULL; } ast_rtp_settos(p->rtp, tos); ast_mutex_init(&p->lock); p->cd.call_reference = callid; p->bridge = bridge_default; p->dtmfmode = dtmfmode; if (p->dtmfmode & H323_DTMF_RFC2833) p->nonCodecCapability |= AST_RTP_DTMF; /* Add to interface list */ ast_mutex_lock(&iflock); p->next = iflist; iflist = p; ast_mutex_unlock(&iflock); return p; } static struct oh323_pvt *find_call(int call_reference) { struct oh323_pvt *p; ast_mutex_lock(&iflock); p = iflist; while(p) { if (p->cd.call_reference == call_reference) { /* Found the call */ ast_mutex_unlock(&iflock); return p; } p = p->next; } ast_mutex_unlock(&iflock); return NULL; } static struct ast_channel *oh323_request(char *type, int format, void *data) { int oldformat; struct oh323_pvt *p; struct ast_channel *tmpc = NULL; char *dest = data; char *ext, *host; char *h323id = NULL; char tmp[256]; ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data); oldformat = format; format &= capability; if (!format) { ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format); return NULL; } strncpy(tmp, dest, sizeof(tmp) - 1); host = strchr(tmp, '@'); if (host) { *host = '\0'; host++; ext = tmp; } else { host = tmp; ext = NULL; } strtok_r(host, "/", &(h323id)); if (*h323id) { h323_set_id(h323id); } p = oh323_alloc(0); if (!p) { ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data); return NULL; } /* Assign a default capability */ p->capability = capability; if (p->dtmfmode) { if (p->dtmfmode & H323_DTMF_RFC2833) p->nonCodecCapability |= AST_RTP_DTMF; else p->nonCodecCapability &= ~AST_RTP_DTMF; } /* pass on our preferred codec to the H.323 stack */ h323_set_capability(format, dtmfmode); if (ext) { strncpy(p->username, ext, sizeof(p->username) - 1); } ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, p->username); tmpc = oh323_new(p, AST_STATE_DOWN, host); if (!tmpc) oh323_destroy(p); restart_monitor(); return tmpc; } struct oh323_alias *find_alias(const char *source_aliases) { struct oh323_alias *a; a = aliasl.aliases; while(a) { if (!strcasecmp(a->name, source_aliases)) { break; } a = a->next; } return a; } struct oh323_user *find_user(const call_details_t cd) { struct oh323_user *u; u = userl.users; if(userbyalias == 1){ while(u) { if (!strcasecmp(u->name, cd.call_source_aliases)) { break; } u = u->next; } } else { while(u) { if (!strcasecmp(cd.sourceIp, inet_ntoa(u->addr.sin_addr))) { break; } u = u->next; } } return u; } struct oh323_peer *find_peer(char *dest_peer) { struct oh323_peer *p; p = peerl.peers; while(p) { if (!strcasecmp(p->name, dest_peer)) { break; } p = p->next; } return p; } /** * Callback for sending digits from H.323 up to asterisk * */ int send_digit(unsigned call_reference, char digit) { struct oh323_pvt *p; struct ast_frame f; ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit); p = find_call(call_reference); if (!p) { ast_log(LOG_ERROR, "Private structure not found in send_digit.\n"); return -1; } memset(&f, 0, sizeof(f)); f.frametype = AST_FRAME_DTMF; f.subclass = digit; f.datalen = 0; f.samples = 800; f.offset = 0; f.data = NULL; f.mallocd = 0; f.src = "SEND_DIGIT"; return ast_queue_frame(p->owner, &f); } /** * Call-back function that gets called when any H.323 connection is made * * Returns the local RTP information */ struct rtp_info *create_connection(unsigned call_reference) { struct oh323_pvt *p; struct sockaddr_in us; struct sockaddr_in them; struct rtp_info *info; info = malloc(sizeof(struct rtp_info)); p = find_call(call_reference); if (!p) { ast_log(LOG_ERROR, "Unable to allocate private structure, this is very bad.\n"); return NULL; } /* figure out our local RTP port and tell the H.323 stack about it*/ ast_rtp_get_us(p->rtp, &us); ast_rtp_get_peer(p->rtp, &them); info->addr = inet_ntoa(us.sin_addr); info->port = ntohs(us.sin_port); return info; } /** * Call-back function for incoming calls * * Returns 1 on success */ int setup_incoming_call(call_details_t cd) { struct oh323_pvt *p = NULL; struct ast_channel *c = NULL; struct oh323_user *user = NULL; struct oh323_alias *alias = NULL; /* allocate the call*/ p = oh323_alloc(cd.call_reference); if (!p) { ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n"); return 0; } /* Populate the call details in the private structure */ p->cd.call_token = cd.call_token; p->cd.call_source_aliases = cd.call_source_aliases; p->cd.call_dest_alias = cd.call_dest_alias; p->cd.call_source_name = cd.call_source_name; p->cd.call_source_e164 = cd.call_source_e164; p->cd.call_dest_e164 = cd.call_dest_e164; if (h323debug) { ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n"); ast_verbose(VERBOSE_PREFIX_3 " Call token: [%s]\n", p->cd.call_token); ast_verbose(VERBOSE_PREFIX_3 " Calling party name: [%s]\n", p->cd.call_source_name); ast_verbose(VERBOSE_PREFIX_3 " Calling party number: [%s]\n", p->cd.call_source_e164); ast_verbose(VERBOSE_PREFIX_3 " Called party name: [%s]\n", p->cd.call_dest_alias); ast_verbose(VERBOSE_PREFIX_3 " Called party number: [%s]\n", p->cd.call_dest_e164); } /* Decide if we are allowing Gatekeeper routed calls*/ if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk == 1)) { if (!ast_strlen_zero(cd.call_dest_e164)) { strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1); strncpy(p->context, default_context, sizeof(p->context)-1); } else { alias = find_alias(cd.call_dest_alias); if (!alias) { ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias); return 0; } strncpy(p->exten, alias->name, sizeof(p->exten)-1); strncpy(p->context, alias->context, sizeof(p->context)-1); } sprintf(p->callerid, "%s <%s>", p->cd.call_source_name, p->cd.call_source_e164); } else { /* Either this call is not from the Gatekeeper or we are not allowing gk routed calls */ user = find_user(cd); if (!user) { sprintf(p->callerid, "%s <%s>", p->cd.call_source_name, p->cd.call_source_e164); if (!ast_strlen_zero(p->cd.call_dest_e164)) { strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1); } else { strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1); } if (ast_strlen_zero(default_context)) { ast_log(LOG_ERROR, "Call from '%s' rejected due to no default context\n", p->cd.call_source_aliases); return 0; } strncpy(p->context, default_context, sizeof(p->context)-1); ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, p->context); } else { if (user->host) { if (strcasecmp(cd.sourceIp, inet_ntoa(user->addr.sin_addr))){ if (ast_strlen_zero(user->context)) { if (ast_strlen_zero(default_context)) { ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd.sourceIp); return 0; } strncpy(p->context, default_context, sizeof(p->context)-1); } else { strncpy(p->context, user->context, sizeof(p->context)-1); } sprintf(p->exten, "i"); ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd.sourceIp); goto exit; } } if (user->incominglimit > 0) { if (user->inUse >= user->incominglimit) { ast_log(LOG_ERROR, "Call from user '%s' rejected due to usage limit of %d\n", user->name, user->incominglimit); return 0; } } strncpy(p->context, user->context, sizeof(p->context)-1); p->bridge = user->bridge; p->nat = user->nat; if (!ast_strlen_zero(user->callerid)) { strncpy(p->callerid, user->callerid, sizeof(p->callerid) - 1); } else { sprintf(p->callerid, "%s <%s>", p->cd.call_source_name, p->cd.call_source_e164); } if (!ast_strlen_zero(p->cd.call_dest_e164)) { strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1); } else { strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1); } if (!ast_strlen_zero(user->accountcode)) { strncpy(p->accountcode, user->accountcode, sizeof(p->accountcode)-1); } /* Increment the usage counter */ user->inUse++; } } exit: /* allocate a channel and tell asterisk about it */ c = oh323_new(p, AST_STATE_RINGING, cd.call_token); if (!c) { ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n"); return 0; } return 1; } /** * Call-back function to establish an outgoing H.323 call * * Returns 1 on success */ int setup_outgoing_call(call_details_t cd) { return 1; } #if 0 if (p->inUse >= p->outgoinglimit) { ast_log(LOG_ERROR, "Call to %s rejected due to usage limit of %d outgoing channels\n", p->name, p->inUse); return 0; } if (!p) { ast_log(LOG_ERROR, "Rejecting call: peer %s not found\n", dest_peer); return 0; } #endif /** * Call-back function that gets called for each rtp channel opened * * Returns nothing */ void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort) { struct oh323_pvt *p = NULL; struct sockaddr_in them; /* Find the call or allocate a private structure if call not found */ p = find_call(call_reference); if (!p) { ast_log(LOG_ERROR, "Something is wrong: rtp\n"); return; } them.sin_family = AF_INET; them.sin_addr.s_addr = inet_addr(remoteIp); // only works for IPv4 them.sin_port = htons(remotePort); ast_rtp_set_peer(p->rtp, &them); return; } /** * Call-back function to signal asterisk that the channel has been answered * Returns nothing */ void connection_made(unsigned call_reference) { struct ast_channel *c = NULL; struct oh323_pvt *p = NULL; p = find_call(call_reference); if (!p) ast_log(LOG_ERROR, "Something is wrong: connection\n"); if (!p->owner) { ast_log(LOG_ERROR, "Channel has no owner\n"); return; } c = p->owner; ast_setstate(c, AST_STATE_UP); ast_queue_control(c, AST_CONTROL_ANSWER); return; } /** * Call-back function to signal asterisk that the channel is ringing * Returns nothing */ void chan_ringing(unsigned call_reference) { struct ast_channel *c = NULL; struct oh323_pvt *p = NULL; p = find_call(call_reference); if (!p) { ast_log(LOG_ERROR, "Something is wrong: ringing\n"); } if (!p->owner) { ast_log(LOG_ERROR, "Channel has no owner\n"); return; } c = p->owner; ast_setstate(c, AST_STATE_RINGING); ast_queue_control(c, AST_CONTROL_RINGING); return; } /** * Call-back function to cleanup communication * Returns nothing, */ void cleanup_connection(call_details_t cd) { struct oh323_pvt *p = NULL; /* struct oh323_peer *peer = NULL; */ struct oh323_user *user = NULL; struct ast_rtp *rtp = NULL; p = find_call(cd.call_reference); if (!p) { return; } ast_mutex_lock(&p->lock); /* Decrement usage counter */ if (!p->outgoing) { user = find_user(cd); if(user) { user->inUse--; } } #if 0 if (p->outgoing) { peer = find_peer(cd.call_dest_alias); peer->inUse--; } else { user = find_user(cd); user->inUse--; } #endif if (p->rtp) { rtp = p->rtp; p->rtp = NULL; /* Immediately stop RTP */ ast_rtp_destroy(rtp); } p->alreadygone = 1; /* Send hangup */ if (p->owner) { ast_queue_hangup(p->owner); } ast_mutex_unlock(&p->lock); return; } static void *do_monitor(void *data) { int res; struct oh323_pvt *oh323 = NULL; for(;;) { /* Check for interfaces needing to be killed */ ast_mutex_lock(&iflock); restartsearch: oh323 = iflist; while(oh323) { if (oh323->needdestroy) { __oh323_destroy(oh323); goto restartsearch; } oh323 = oh323->next; } ast_mutex_unlock(&iflock); /* Wait for sched or io */ res = ast_sched_wait(sched); if ((res < 0) || (res > 1000)) res = 1000; res = ast_io_wait(io, res); pthread_testcancel(); ast_mutex_lock(&monlock); if (res >= 0) ast_sched_runq(sched); ast_mutex_unlock(&monlock); } /* Never reached */ return NULL; } static int restart_monitor(void) { /* If we're supposed to be stopped -- stay stopped */ if (monitor_thread == AST_PTHREADT_STOP) return 0; if (ast_mutex_lock(&monlock)) { ast_log(LOG_WARNING, "Unable to lock monitor\n"); return -1; } if (monitor_thread == pthread_self()) { ast_mutex_unlock(&monlock); ast_log(LOG_WARNING, "Cannot kill myself\n"); return -1; } if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) { /* Wake up the thread */ pthread_kill(monitor_thread, SIGURG); } else { /* Start a new monitor */ if (pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) { ast_mutex_unlock(&monlock); ast_log(LOG_ERROR, "Unable to start monitor thread.\n"); return -1; } } ast_mutex_unlock(&monlock); return 0; } static int h323_do_trace(int fd, int argc, char *argv[]) { if (argc != 3) { return RESULT_SHOWUSAGE; } h323_debug(1, atoi(argv[2])); ast_cli(fd, "H.323 trace set to level %s\n", argv[2]); return RESULT_SUCCESS; } static int h323_no_trace(int fd, int argc, char *argv[]) { if (argc != 3) { return RESULT_SHOWUSAGE; } h323_debug(0,0); ast_cli(fd, "H.323 trace disabled\n"); return RESULT_SUCCESS; } static int h323_do_debug(int fd, int argc, char *argv[]) { if (argc != 2) { return RESULT_SHOWUSAGE; } h323debug = 1; ast_cli(fd, "H323 debug enabled\n"); return RESULT_SUCCESS; } static int h323_no_debug(int fd, int argc, char *argv[]) { if (argc != 3) { return RESULT_SHOWUSAGE; } h323debug = 0; ast_cli(fd, "H323 Debug disabled\n"); return RESULT_SUCCESS; } static int h323_gk_cycle(int fd, int argc, char *argv[]) { return RESULT_SUCCESS; #if 0 if (argc != 3) { return RESULT_SHOWUSAGE; } h323_gk_urq(); /* Possibly register with a GK */ if (!gatekeeper_disable) { if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) { ast_log(LOG_ERROR, "Gatekeeper registration failed.\n"); } } return RESULT_SUCCESS; #endif } static int h323_ep_hangup(int fd, int argc, char *argv[]) { if (argc != 3) { return RESULT_SHOWUSAGE; } if (h323_soft_hangup(argv[2])) { ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]); } else { ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]); } return RESULT_SUCCESS; } static int h323_tokens_show(int fd, int argc, char *argv[]) { if (argc != 3) { return RESULT_SHOWUSAGE; } h323_show_tokens(); return RESULT_SUCCESS; } static char trace_usage[] = "Usage: h.323 trace \n" " Enables H.323 stack tracing for debugging purposes\n"; static char no_trace_usage[] = "Usage: h.323 no trace\n" " Disables H.323 stack tracing for debugging purposes\n"; static char debug_usage[] = "Usage: h.323 debug\n" " Enables chan_h323 debug output\n"; static char no_debug_usage[] = "Usage: h.323 no debug\n" " Disables chan_h323 debug output\n"; static char show_codec_usage[] = "Usage: h.323 show codec\n" " Shows all enabled codecs\n"; static char show_cycle_usage[] = "Usage: h.323 gk cycle\n" " Manually re-register with the Gatekeper\n"; static char show_hangup_usage[] = "Usage: h.323 hangup \n" " Manually try to hang up call identified by \n"; static char show_tokens_usage[] = "Usage: h.323 show tokens\n" " Print out all active call tokens\n"; static struct ast_cli_entry cli_trace = { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage }; static struct ast_cli_entry cli_no_trace = { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage }; static struct ast_cli_entry cli_debug = { { "h.323", "debug", NULL }, h323_do_debug, "Enable chan_h323 debug", debug_usage }; static struct ast_cli_entry cli_no_debug = { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable chan_h323 debug", no_debug_usage }; static struct ast_cli_entry cli_show_codecs = { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage }; static struct ast_cli_entry cli_gk_cycle = { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage }; static struct ast_cli_entry cli_hangup_call = { { "h.323", "hangup", NULL }, h323_ep_hangup, "Show all active call tokens", show_hangup_usage }; static struct ast_cli_entry cli_show_tokens = { { "h.323", "show", "tokens", NULL }, h323_tokens_show, "Manually try to hang up a call", show_tokens_usage }; int reload_config(void) { int format; struct ast_config *cfg; struct ast_variable *v; struct oh323_peer *peer = NULL; struct oh323_user *user = NULL; struct oh323_alias *alias = NULL; struct ast_hostent ahp; struct hostent *hp; char *cat; char *utype; cfg = ast_load(config); /* We *must* have a config file otherwise stop immediately */ if (!cfg) { ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config); return 1; } /* fire up the H.323 Endpoint */ if (!h323_end_point_exist()) { h323_end_point_create(); } h323debug=0; dtmfmode = H323_DTMF_RFC2833; memset(&bindaddr, 0, sizeof(bindaddr)); v = ast_variable_browse(cfg, "general"); while(v) { /* Create the interface list */ if (!strcasecmp(v->name, "port")) { port = (int)strtol(v->value, NULL, 10); } else if (!strcasecmp(v->name, "bindaddr")) { if (!(hp = ast_gethostbyname(v->value, &ahp))) { ast_log(LOG_WARNING, "Invalid address: %s\n", v->value); } else { memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr)); } } else if (!strcasecmp(v->name, "allow")) { format = ast_getformatbyname(v->value); if (format < 1) ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value); else capability |= format; } else if (!strcasecmp(v->name, "disallow")) { format = ast_getformatbyname(v->value); if (format < 1) ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value); else capability &= ~format; } else if (!strcasecmp(v->name, "tos")) { if (sscanf(v->value, "%i", &format) == 1) tos = format & 0xff; else if (!strcasecmp(v->value, "lowdelay")) tos = IPTOS_LOWDELAY; else if (!strcasecmp(v->value, "throughput")) tos = IPTOS_THROUGHPUT; else if (!strcasecmp(v->value, "reliability")) tos = IPTOS_RELIABILITY; else if (!strcasecmp(v->value, "mincost")) tos = IPTOS_MINCOST; else if (!strcasecmp(v->value, "none")) tos = 0; else ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno); } else if (!strcasecmp(v->name, "gatekeeper")) { if (!strcasecmp(v->value, "DISABLE")) { gatekeeper_disable = 1; usingGk = 0; } else if (!strcasecmp(v->value, "DISCOVER")) { gatekeeper_disable = 0; gatekeeper_discover = 1; usingGk = 1; } else { gatekeeper_disable = 0; usingGk = 1; strncpy(gatekeeper, v->value, sizeof(gatekeeper)-1); } } else if (!strcasecmp(v->name, "secret")) { strncpy(secret, v->value, sizeof(secret)-1); } else if (!strcasecmp(v->name, "AllowGKRouted")) { gkroute = ast_true(v->value); } else if (!strcasecmp(v->name, "context")) { strncpy(default_context, v->value, sizeof(default_context)-1); ast_verbose(VERBOSE_PREFIX_3 " == Setting default context to %s\n", default_context); } else if (!strcasecmp(v->name, "dtmfmode")) { if (!strcasecmp(v->value, "inband")) dtmfmode=H323_DTMF_INBAND; else if (!strcasecmp(v->value, "rfc2833")) dtmfmode = H323_DTMF_RFC2833; else { ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value); dtmfmode = H323_DTMF_RFC2833; } } else if (!strcasecmp(v->name, "UserByAlias")) { userbyalias = ast_true(v->value); } else if (!strcasecmp(v->name, "bridge")) { bridge_default = ast_true(v->value); } v = v->next; } cat = ast_category_browse(cfg, NULL); while(cat) { if (strcasecmp(cat, "general")) { utype = ast_variable_retrieve(cfg, cat, "type"); if (utype) { if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) { user = build_user(cat, ast_variable_browse(cfg, cat)); if (user) { ast_mutex_lock(&userl.lock); user->next = userl.users; userl.users = user; ast_mutex_unlock(&userl.lock); } } else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) { peer = build_peer(cat, ast_variable_browse(cfg, cat)); if (peer) { ast_mutex_lock(&peerl.lock); peer->next = peerl.peers; peerl.peers = peer; ast_mutex_unlock(&peerl.lock); } } else if (!strcasecmp(utype, "h323")) { alias = build_alias(cat, ast_variable_browse(cfg, cat)); if (alias) { ast_mutex_lock(&aliasl.lock); alias->next = aliasl.aliases; aliasl.aliases = alias; ast_mutex_unlock(&aliasl.lock); } } else { ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config); } } else ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat); } cat = ast_category_browse(cfg, cat); } /* Register our H.323 aliases if any*/ while (alias) { if (h323_set_alias(alias)) { ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name); return -1; } alias = alias->next; } /* Add some capabilities */ if(h323_set_capability(capability, dtmfmode)) { ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n"); return -1; } ast_destroy(cfg); return 0; } void delete_users(void) { struct oh323_user *user, *userlast; struct oh323_peer *peer; /* Delete all users */ ast_mutex_lock(&userl.lock); for (user=userl.users;user;) { userlast = user; user=user->next; free(userlast); } userl.users=NULL; ast_mutex_unlock(&userl.lock); ast_mutex_lock(&peerl.lock); for (peer=peerl.peers;peer;) { /* Assume all will be deleted, and we'll find out for sure later */ peer->delme = 1; peer = peer->next; } ast_mutex_unlock(&peerl.lock); } void delete_aliases(void) { struct oh323_alias *alias, *aliaslast; /* Delete all users */ ast_mutex_lock(&aliasl.lock); for (alias=aliasl.aliases;alias;) { aliaslast = alias; alias=alias->next; free(aliaslast); } aliasl.aliases=NULL; ast_mutex_unlock(&aliasl.lock); } void prune_peers(void) { /* Prune peers who still are supposed to be deleted */ struct oh323_peer *peer, *peerlast, *peernext; ast_mutex_lock(&peerl.lock); peerlast = NULL; for (peer=peerl.peers;peer;) { peernext = peer->next; if (peer->delme) { free(peer); if (peerlast) peerlast->next = peernext; else peerl.peers = peernext; } else peerlast = peer; peer=peernext; } ast_mutex_unlock(&peerl.lock); } int reload(void) { delete_users(); delete_aliases(); prune_peers(); #if 0 if (!ast_strlen_zero(gatekeeper)) { h323_gk_urq(); } #endif reload_config(); #if 0 /* Possibly register with a GK */ if (gatekeeper_disable == 0) { if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) { ast_log(LOG_ERROR, "Gatekeeper registration failed.\n"); h323_end_process(); return -1; } } #endif restart_monitor(); return 0; } static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan) { struct oh323_pvt *p; p = chan->pvt->pvt; if (p && p->rtp && p->bridge) { return p->rtp; } return NULL; } static struct ast_rtp *oh323_get_vrtp_peer(struct ast_channel *chan) { return NULL; } static char *convertcap(int cap) { switch (cap) { case AST_FORMAT_G723_1: return "G.723"; case AST_FORMAT_GSM: return "GSM"; case AST_FORMAT_ULAW: return "ULAW"; case AST_FORMAT_ALAW: return "ALAW"; case AST_FORMAT_ADPCM: return "G.728"; case AST_FORMAT_G729A: return "G.729"; case AST_FORMAT_SPEEX: return "SPEEX"; case AST_FORMAT_ILBC: return "ILBC"; default: ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap); return NULL; } } static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs) { /* XXX Deal with Video */ struct oh323_pvt *p; struct sockaddr_in them; struct sockaddr_in us; char *mode; mode = convertcap(chan->writeformat); if (!rtp) { return 0; } p = chan->pvt->pvt; if (!p) { ast_log(LOG_ERROR, "No Private Structure, this is bad\n"); return -1; } ast_rtp_get_peer(rtp, &them); ast_rtp_get_us(rtp, &us); h323_native_bridge(p->cd.call_token, inet_ntoa(them.sin_addr), mode); return 0; } static struct ast_rtp_protocol oh323_rtp = { get_rtp_info: oh323_get_rtp_peer, get_vrtp_info: oh323_get_vrtp_peer, set_rtp_peer: oh323_set_rtp_peer, }; int load_module() { int res; res = reload_config(); if (res) { return 0; } else { /* Make sure we can register our channel type */ if (ast_channel_register(type, tdesc, capability, oh323_request)) { ast_log(LOG_ERROR, "Unable to register channel class %s\n", type); h323_end_process(); return -1; } ast_cli_register(&cli_debug); ast_cli_register(&cli_no_debug); ast_cli_register(&cli_trace); ast_cli_register(&cli_no_trace); ast_cli_register(&cli_show_codecs); ast_cli_register(&cli_gk_cycle); ast_cli_register(&cli_hangup_call); ast_cli_register(&cli_show_tokens); oh323_rtp.type = type; ast_rtp_proto_register(&oh323_rtp); sched = sched_context_create(); if (!sched) { ast_log(LOG_WARNING, "Unable to create schedule context\n"); } io = io_context_create(); if (!io) { ast_log(LOG_WARNING, "Unable to create I/O context\n"); } /* Register our callback functions */ h323_callback_register(setup_incoming_call, setup_outgoing_call, create_connection, setup_rtp_connection, cleanup_connection, chan_ringing, connection_made, send_digit); /* start the h.323 listener */ if (h323_start_listener(port, bindaddr)) { ast_log(LOG_ERROR, "Unable to create H323 listener.\n"); return -1; } /* Possibly register with a GK */ if (gatekeeper_disable == 0) { if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) { ast_log(LOG_ERROR, "Gatekeeper registration failed.\n"); return 0; } } /* And start the monitor for the first time */ restart_monitor(); } return res; } int unload_module() { struct oh323_pvt *p, *pl; if (!ast_mutex_lock(&iflock)) { /* hangup all interfaces if they have an owner */ p = iflist; while(p) { if (p->owner) ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD); p = p->next; } iflist = NULL; ast_mutex_unlock(&iflock); } else { ast_log(LOG_WARNING, "Unable to lock the interface list\n"); return -1; } if (!ast_mutex_lock(&monlock)) { if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) { pthread_cancel(monitor_thread); pthread_kill(monitor_thread, SIGURG); pthread_join(monitor_thread, NULL); } monitor_thread = AST_PTHREADT_STOP; ast_mutex_unlock(&monlock); } else { ast_log(LOG_WARNING, "Unable to lock the monitor\n"); return -1; } if (!ast_mutex_lock(&iflock)) { /* destroy all the interfaces and free their memory */ p = iflist; while(p) { pl = p; p = p->next; /* free associated memory */ free(pl); } iflist = NULL; ast_mutex_unlock(&iflock); } else { ast_log(LOG_WARNING, "Unable to lock the interface list\n"); return -1; } h323_gk_urq(); h323_end_process(); /* unregister rtp */ ast_rtp_proto_unregister(&oh323_rtp); /* unregister commands */ ast_cli_unregister(&cli_debug); ast_cli_unregister(&cli_no_debug); ast_cli_unregister(&cli_trace); ast_cli_unregister(&cli_no_trace); ast_cli_unregister(&cli_show_codecs); ast_cli_unregister(&cli_gk_cycle); ast_cli_unregister(&cli_hangup_call); ast_cli_unregister(&cli_show_tokens); /* unregister channel type */ ast_channel_unregister(type); return 0; } int usecount() { int res; ast_mutex_lock(&usecnt_lock); res = usecnt; ast_mutex_unlock(&usecnt_lock); return res; } char *description() { return desc; } char *key() { return ASTERISK_GPL_KEY; }