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asterisk/channels/chan_h323.c
Jeremy McNamara ddd6a40a44 stop seg on reload if no h323.conf file and hopefully not break the monitor thread 
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4013 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2004-10-15 07:07:50 +00:00

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/*
* chan_h323.c
*
* OpenH323 Channel Driver for ASTERISK PBX.
* By Jeremy McNamara
* For The NuFone Network
*
* chan_h323 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 <sys/socket.h>
#include <sys/signal.h>
#include <sys/param.h>
#if defined(BSD)
#ifndef IPTOS_MINCOST
#define IPTOS_MINCOST 0x02
#endif
#endif
#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>
#ifdef __cplusplus
extern "C" {
#endif
#include <asterisk/lock.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/channel_pvt.h>
#include <asterisk/config.h>
#include <asterisk/module.h>
#include <asterisk/pbx.h>
#include <asterisk/options.h>
#include <asterisk/utils.h>
#include <asterisk/lock.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>
#ifdef __cplusplus
}
#endif
#include "h323/chan_h323.h"
send_digit_cb on_send_digit;
on_rtp_cb on_external_rtp_create;
start_rtp_cb on_start_rtp_channel;
setup_incoming_cb on_incoming_call;
setup_outbound_cb on_outgoing_call;
chan_ringing_cb on_chan_ringing;
con_established_cb on_connection_established;
clear_con_cb on_connection_cleared;
answer_call_cb on_answer_call;
/* global debug flag */
int h323debug;
/** 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] = "default";
/** H.323 configuration values */
static int h323_signalling_port = 1720;
static char gatekeeper[100];
static int gatekeeper_disable = 1;
static int gatekeeper_discover = 0;
static int usingGk = 0;
static int gkroute = 0;
static int noFastStart = 0;
static int noH245Tunneling = 0;
static int noSilenceSuppression = 0;
/* Assume we can native bridge by default */
static int bridging = 1;
/* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
static int userbyalias = 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 options; /* 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 */
struct sockaddr_in sa; /* Our peer */
struct sockaddr_in redirip; /* Where our RTP should be going if not to 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;
static struct ast_peer_list {
struct oh323_peer *peers;
ast_mutex_t lock;
} peerl;
static struct ast_alias_list {
struct oh323_alias *aliases;
ast_mutex_t lock;
} aliasl;
/** Asterisk RTP stuff */
static struct sched_context *sched;
static struct io_context *io;
/** Protect the interface list (oh323_pvt) */
AST_MUTEX_DEFINE_STATIC(iflock);
/** Usage counter and associated lock */
static int usecnt =0;
AST_MUTEX_DEFINE_STATIC(usecnt_lock);
/* Protect the monitoring thread, so only one process can kill or start it, and not
when it's doing something critical. */
AST_MUTEX_DEFINE_STATIC(monlock);
/* Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
AST_MUTEX_DEFINE_STATIC(caplock);
/* Protect the reload process */
AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
static int h323_reloading = 0;
/* 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 int h323_do_reload(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 {
ast_mutex_destroy(&p->lock);
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;
/* set the native brigding default */
user->bridge = bridging;
strncpy(user->context, default_context, sizeof(user->context) - 1);
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, "A dynamic host on a type=user does not make any sense\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;
struct ast_ha *oldha = NULL;
int found=0;
int format;
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 = (struct oh323_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);
peer->addr.sin_port = htons(h323_signalling_port);
peer->addr.sin_family = AF_INET;
}
oldha = peer->ha;
peer->ha = NULL;
peer->addr.sin_family = AF_INET;
peer->capability = capability;
while(v) {
if (!strcasecmp(v->name, "bridge")) {
peer->bridge = ast_true(v->value);
} else if (!strcasecmp(v->name, "nat")) {
peer->nat = 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, "dtmfmode")) {
if (!strcasecmp(v->value, "inband")) {
peer->dtmfmode = H323_DTMF_INBAND;
} else if (!strcasecmp(v->value, "rfc2833")) {
peer->dtmfmode = H323_DTMF_RFC2833;
} else {
ast_log(LOG_WARNING, "Unknown DTMF Mode %s, using RFC2833\n", v->value);
peer->dtmfmode = H323_DTMF_RFC2833;
}
} 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 {
peer->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 {
peer->capability |= ~format;
}
} 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.\n");
free(peer);
return NULL;
}
if (ast_get_ip(&peer->addr, v->value)) {
ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
free(peer);
return NULL;
}
} else if (!strcasecmp(v->name, "port")) {
peer->addr.sin_port = htons(atoi(v->value));
}
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 = (struct oh323_pvt *) 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.
* Returns -1 on error, 0 on success.
*/
static int oh323_call(struct ast_channel *c, char *dest, int timeout)
{
int res = 0;
struct oh323_pvt *pvt = (struct oh323_pvt *)c->pvt->pvt;
char called_addr[INET_ADDRSTRLEN];
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;
}
/* Clear and then set the address to call */
memset(called_addr, 0, sizeof(called_addr));
if (usingGk) {
memcpy(called_addr, dest, strlen(called_addr));
pvt->options.noFastStart = noFastStart;
pvt->options.noH245Tunneling = noH245Tunneling;
pvt->options.noSilenceSuppression = noSilenceSuppression;
pvt->options.port = h323_signalling_port;
} else {
ast_inet_ntoa(called_addr, sizeof(called_addr), pvt->sa.sin_addr);
pvt->options.port = htons(pvt->sa.sin_port);
}
/* indicate that this is an outgoing call */
pvt->outgoing = 1;
ast_log(LOG_DEBUG, "Outgoing call to %s:%d\n", called_addr, pvt->options.port);
res = h323_make_call(called_addr, &(pvt->cd), pvt->options);
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 *pvt = (struct oh323_pvt *) c->pvt->pvt;
res = h323_answering_call(pvt->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 *pvt = (struct oh323_pvt *) 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(&pvt->lock);
/* Determine how to disconnect */
if (pvt->owner != c) {
ast_log(LOG_WARNING, "Huh? We aren't the owner?\n");
ast_mutex_unlock(&pvt->lock);
return 0;
}
if (!c || (c->_state != AST_STATE_UP))
needcancel = 1;
/* Disconnect */
pvt = (struct oh323_pvt *) c->pvt->pvt;
/* Free dsp used for in-band DTMF detection */
if (pvt->vad) {
ast_dsp_free(pvt->vad);
}
pvt->owner = NULL;
c->pvt->pvt = NULL;
/* Start the process if it's not already started */
if (!pvt->alreadygone) {
if (h323_clear_call((pvt->cd).call_token)) {
ast_log(LOG_DEBUG, "ClearCall failed.\n");
}
pvt->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(&pvt->lock);
return 0;
}
static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
{
/* Retrieve audio/etc from channel. Assumes pvt->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(pvt->nat)
{
ast_rtp_setnat(pvt->rtp,pvt->nat);
pvt->nat = 0;
}
f = ast_rtp_read(pvt->rtp);
/* Don't send RFC2833 if we're not supposed to */
if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->dtmfmode & H323_DTMF_RFC2833))
return &null_frame;
if (pvt->owner) {
/* We already hold the channel lock */
if (f->frametype == AST_FRAME_VOICE) {
if (f->subclass != pvt->owner->nativeformats) {
ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
pvt->owner->nativeformats = f->subclass;
ast_set_read_format(pvt->owner, pvt->owner->readformat);
ast_set_write_format(pvt->owner, pvt->owner->writeformat);
}
/* Do in-band DTMF detection */
if (pvt->dtmfmode & H323_DTMF_INBAND) {
f = ast_dsp_process(pvt->owner,pvt->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 *pvt = (struct oh323_pvt *) c->pvt->pvt;
ast_mutex_lock(&pvt->lock);
fr = oh323_rtp_read(pvt);
ast_mutex_unlock(&pvt->lock);
return fr;
}
static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
{
struct oh323_pvt *pvt = (struct oh323_pvt *) 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 (pvt) {
ast_mutex_lock(&pvt->lock);
if (pvt->rtp) {
res = ast_rtp_write(pvt->rtp, frame);
}
ast_mutex_unlock(&pvt->lock);
}
return res;
}
static int oh323_indicate(struct ast_channel *c, int condition)
{
struct oh323_pvt *pvt = (struct oh323_pvt *) c->pvt->pvt;
switch(condition) {
case AST_CONTROL_RINGING:
if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
h323_send_alerting(pvt->cd.call_token);
break;
}
return -1;
case AST_CONTROL_PROGRESS:
if (c->_state != AST_STATE_UP) {
h323_send_progress(pvt->cd.call_token);
break;
}
return -1;
case AST_CONTROL_BUSY:
if (c->_state != AST_STATE_UP) {
h323_answering_call(pvt->cd.call_token, 1);
pvt->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(pvt->cd.call_token, 1);
pvt->alreadygone = 1;
ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
break;
}
return -1;
case AST_CONTROL_PROCEEDING:
case -1:
return -1;
default:
ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
return -1;
}
return 0;
}
static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->pvt->pvt;
ast_mutex_lock(&pvt->lock);
if (pvt->owner != oldchan) {
ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
return -1;
}
pvt->owner = newchan;
ast_mutex_unlock(&pvt->lock);
return 0;
}
static struct ast_channel *oh323_new(struct oh323_pvt *pvt, int state, const char *host)
{
struct ast_channel *ch;
int fmt;
ch = ast_channel_alloc(1);
if (ch) {
snprintf(ch->name, sizeof(ch->name), "H323/%s", host);
ch->nativeformats = pvt->capability;
if (!ch->nativeformats)
ch->nativeformats = capability;
fmt = ast_best_codec(ch->nativeformats);
ch->type = type;
ch->fds[0] = ast_rtp_fd(pvt->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 (pvt->dtmfmode & H323_DTMF_INBAND) {
pvt->vad = ast_dsp_new();
ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
}
/* Register the OpenH323 channel's functions. */
ch->pvt->pvt = pvt;
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 */
pvt->owner = ch;
ast_mutex_lock(&usecnt_lock);
usecnt++;
ast_mutex_unlock(&usecnt_lock);
ast_update_use_count();
strncpy(ch->context, pvt->context, sizeof(ch->context) - 1);
strncpy(ch->exten, pvt->exten, sizeof(ch->exten) - 1);
ch->priority = 1;
if (!ast_strlen_zero(pvt->accountcode))
strncpy(ch->accountcode, pvt->accountcode, sizeof(ch->accountcode) - 1);
if (pvt->amaflags)
ch->amaflags = pvt->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 *pvt;
pvt = (struct oh323_pvt *) malloc(sizeof(struct oh323_pvt));
if (!pvt) {
ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
return NULL;
}
/* Keep track of stuff */
memset(pvt, 0, sizeof(struct oh323_pvt));
pvt->rtp = ast_rtp_new(sched, io, 1, 0);
if (!pvt->rtp) {
ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
free(pvt);
return NULL;
}
ast_rtp_settos(pvt->rtp, tos);
ast_mutex_init(&pvt->lock);
/* Ensure the call token is allocated */
if ((pvt->cd).call_token == NULL) {
(pvt->cd).call_token = (char *)malloc(128);
}
memset((char *)(pvt->cd).call_token, 0, 128);
if (!pvt->cd.call_token) {
ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
return NULL;
}
pvt->cd.call_reference = callid;
pvt->bridge = bridging;
pvt->dtmfmode = dtmfmode;
if (pvt->dtmfmode & H323_DTMF_RFC2833) {
pvt->nonCodecCapability |= AST_RTP_DTMF;
}
strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
/* Add to interface list */
ast_mutex_lock(&iflock);
pvt->next = iflist;
iflist = pvt;
ast_mutex_unlock(&iflock);
return pvt;
}
static struct oh323_pvt *find_call(int call_reference, const char *token)
{
struct oh323_pvt *pvt;
ast_mutex_lock(&iflock);
pvt = iflist;
while(pvt) {
if ((signed int)pvt->cd.call_reference == call_reference) {
/* Found the call */
if ((token != NULL) && (strcmp(pvt->cd.call_token, token) == 0)) {
ast_mutex_unlock(&iflock);
return pvt;
} else if(token == NULL) {
ast_log(LOG_DEBUG, "token is NULL, skipping comparition\n");
ast_mutex_unlock(&iflock);
return pvt;
}
}
pvt = pvt->next;
}
ast_mutex_unlock(&iflock);
return NULL;
}
struct oh323_user *find_user(const call_details_t cd)
{
struct oh323_user *u;
char iabuf[INET_ADDRSTRLEN];
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, ast_inet_ntoa(iabuf, sizeof(iabuf), u->addr.sin_addr))) {
break;
}
u = u->next;
}
}
return u;
}
struct oh323_peer *find_peer(char *peer, struct sockaddr_in *sin)
{
struct oh323_peer *p = NULL;
static char iabuf[INET_ADDRSTRLEN];
p = peerl.peers;
if (peer) {
while(p) {
if (!strcasecmp(p->name, peer)) {
ast_log(LOG_DEBUG, "Found peer %s by name\n", peer);
break;
}
p = p->next;
}
} else {
/* find by sin */
if (sin) {
while (p) {
if ((!inaddrcmp(&p->addr, sin)) ||
(p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)) {
ast_log(LOG_DEBUG, "Found peer %s/%s by addr\n", peer, ast_inet_ntoa(iabuf, sizeof(iabuf), p->addr.sin_addr));
break;
}
p = p->next;
}
}
}
if (!p) {
ast_log(LOG_DEBUG, "Could not find peer %s by name or address\n", peer);
}
return p;
}
static int create_addr(struct oh323_pvt *pvt, char *opeer)
{
struct hostent *hp;
struct ast_hostent ahp;
struct oh323_peer *p;
int portno;
int found = 0;
char *port;
char *hostn;
char peer[256] = "";
strncpy(peer, opeer, sizeof(peer) - 1);
port = strchr(peer, ':');
if (port) {
*port = '\0';
port++;
}
pvt->sa.sin_family = AF_INET;
ast_mutex_lock(&peerl.lock);
p = find_peer(peer, NULL);
if (p) {
found++;
pvt->capability = p->capability;
pvt->nat = p->nat;
if (pvt->rtp) {
ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->nat);
ast_rtp_setnat(pvt->rtp, pvt->nat);
}
pvt->options.noFastStart = p->noFastStart;
pvt->options.noH245Tunneling = p->noH245Tunneling;
pvt->options.noSilenceSuppression = p->noSilenceSuppression;
if (pvt->dtmfmode) {
pvt->dtmfmode = p->dtmfmode;
if (pvt->dtmfmode & H323_DTMF_RFC2833) {
pvt->nonCodecCapability |= AST_RTP_DTMF;
} else {
pvt->nonCodecCapability &= ~AST_RTP_DTMF;
}
}
if (p->addr.sin_addr.s_addr) {
pvt->sa.sin_addr = p->addr.sin_addr;
pvt->sa.sin_port = p->addr.sin_port;
}
}
ast_mutex_unlock(&peerl.lock);
if (!p && !found) {
hostn = peer;
if (port) {
portno = atoi(port);
} else {
portno = h323_signalling_port;
}
hp = ast_gethostbyname(hostn, &ahp);
if (hp) {
memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
pvt->sa.sin_port = htons(portno);
return 0;
} else {
ast_log(LOG_WARNING, "No such host: %s\n", peer);
return -1;
}
} else if (!p) {
return -1;
} else {
return 0;
}
}
static struct ast_channel *oh323_request(const char *type, int format, void *data)
{
int oldformat;
struct oh323_pvt *pvt;
struct ast_channel *tmpc = NULL;
char *dest = (char *)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);
pvt = oh323_alloc(0);
if (!pvt) {
ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
return NULL;
}
oldformat = format;
format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
if (!format) {
ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
return NULL;
}
/* Assign default capabilities */
pvt->capability = capability;
pvt->dtmfmode = H323_DTMF_RFC2833;
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 && !ast_strlen_zero(h323id)) {
h323_set_id(h323id);
}
if (ext) {
strncpy(pvt->username, ext, sizeof(pvt->username) - 1);
}
ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, pvt->username);
if (!usingGk) {
if (create_addr(pvt, host)) {
oh323_destroy(pvt);
return NULL;
}
}
/* pass on our capabilites to the H.323 stack */
ast_mutex_lock(&caplock);
h323_set_capability(pvt->capability, pvt->dtmfmode);
ast_mutex_unlock(&caplock);
ast_mutex_lock(&pvt->lock);
tmpc = oh323_new(pvt, AST_STATE_DOWN, host);
ast_mutex_unlock(&pvt->lock);
if (!tmpc) {
oh323_destroy(pvt);
}
ast_update_use_count();
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;
}
/**
* Callback for sending digits from H.323 up to asterisk
*
*/
int send_digit(unsigned call_reference, char digit, const char *token)
{
struct oh323_pvt *pvt;
struct ast_frame f;
ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
pvt = find_call(call_reference, token);
if (!pvt) {
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(pvt->owner, &f);
}
/**
* Callback function used to inform the H.323 stack of the local rtp ip/port details
*
* Returns the local RTP information
*/
struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
{
struct oh323_pvt *pvt;
struct sockaddr_in us;
struct rtp_info *info;
static char iabuf[INET_ADDRSTRLEN];
info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
if (!info) {
ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
return NULL;
}
pvt = find_call(call_reference, token);
if (!pvt) {
ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
return NULL;
}
/* figure out our local RTP port and tell the H.323 stack about it */
ast_rtp_get_us(pvt->rtp, &us);
/* evil hack, until I (someone?) figures out a better way */
info->addr = ast_inet_ntoa(iabuf, sizeof(iabuf), bindaddr.sin_addr);
info->port = ntohs(us.sin_port);
ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
return info;
}
/**
* Call-back function passing remote ip/port information from H.323 to asterisk
*
* Returns nothing
*/
void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token)
{
struct oh323_pvt *pvt = NULL;
struct sockaddr_in them;
/* Find the call or allocate a private structure if call not found */
pvt = find_call(call_reference, token);
if (!pvt) {
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(pvt->rtp, &them);
return;
}
/**
* Call-back function to signal asterisk that the channel has been answered
* Returns nothing
*/
void connection_made(unsigned call_reference, const char *token)
{
struct ast_channel *c = NULL;
struct oh323_pvt *pvt = NULL;
pvt = find_call(call_reference, token);
if (!pvt) {
ast_log(LOG_ERROR, "Something is wrong: connection\n");
return;
}
if (!pvt->owner) {
ast_log(LOG_ERROR, "Channel has no owner\n");
return;
}
c = pvt->owner;
ast_setstate(c, AST_STATE_UP);
ast_queue_control(c, AST_CONTROL_ANSWER);
return;
}
/**
* Call-back function for incoming calls
*
* Returns 1 on success
*/
int setup_incoming_call(call_details_t cd)
{
struct oh323_pvt *pvt = NULL;
struct oh323_user *user = NULL;
struct oh323_alias *alias = NULL;
char iabuf[INET_ADDRSTRLEN];
/* allocate the call*/
pvt = oh323_alloc(cd.call_reference);
if (!pvt) {
ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
return 0;
}
/* Populate the call details in the private structure */
pvt->cd.call_token = strdup(cd.call_token);
pvt->cd.call_source_aliases = strdup(cd.call_source_aliases);
pvt->cd.call_dest_alias = strdup(cd.call_dest_alias);
pvt->cd.call_source_name = strdup(cd.call_source_name);
pvt->cd.call_source_e164 = strdup(cd.call_source_e164);
pvt->cd.call_dest_e164 = strdup(cd.call_dest_e164);
if (h323debug) {
ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
ast_verbose(VERBOSE_PREFIX_3 " Call token: [%s]\n", pvt->cd.call_token);
ast_verbose(VERBOSE_PREFIX_3 " Calling party name: [%s]\n", pvt->cd.call_source_name);
ast_verbose(VERBOSE_PREFIX_3 " Calling party number: [%s]\n", pvt->cd.call_source_e164);
ast_verbose(VERBOSE_PREFIX_3 " Called party name: [%s]\n", pvt->cd.call_dest_alias);
ast_verbose(VERBOSE_PREFIX_3 " Called party number: [%s]\n", pvt->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(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
strncpy(pvt->context, default_context, sizeof(pvt->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(pvt->exten, alias->name, sizeof(pvt->exten) - 1);
strncpy(pvt->context, alias->context, sizeof(pvt->context) - 1);
}
snprintf(pvt->callerid, sizeof(pvt->callerid), "%s <%s>", pvt->cd.call_source_name, pvt->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) {
snprintf(pvt->callerid, sizeof(pvt->callerid), "%s <%s>", pvt->cd.call_source_name, pvt->cd.call_source_e164);
if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
strncpy(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
} else {
strncpy(pvt->exten, cd.call_dest_alias, sizeof(pvt->exten) - 1);
}
if (ast_strlen_zero(default_context)) {
ast_log(LOG_ERROR, "Call from '%s' rejected due to no default context\n", pvt->cd.call_source_aliases);
return 0;
}
strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, pvt->context);
} else {
if (user->host) {
if (strcasecmp(cd.sourceIp, ast_inet_ntoa(iabuf, sizeof(iabuf), 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(pvt->context, default_context, sizeof(pvt->context) - 1);
} else {
strncpy(pvt->context, user->context, sizeof(pvt->context) - 1);
}
pvt->exten[0] = 'i';
pvt->exten[1] = '\0';
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(pvt->context, user->context, sizeof(pvt->context) - 1);
pvt->bridge = user->bridge;
pvt->nat = user->nat;
if (!ast_strlen_zero(user->callerid)) {
strncpy(pvt->callerid, user->callerid, sizeof(pvt->callerid) - 1);
} else {
snprintf(pvt->callerid, sizeof(pvt->callerid), "%s <%s>", pvt->cd.call_source_name, pvt->cd.call_source_e164);
}
if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
strncpy(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
} else {
strncpy(pvt->exten, cd.call_dest_alias, sizeof(pvt->exten) - 1);
}
if (!ast_strlen_zero(user->accountcode)) {
strncpy(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode) - 1);
}
/* Increment the usage counter */
user->inUse++;
}
}
exit:
return 1;
}
/**
* Call-back function to start PBX when OpenH323 ready to serve incoming call
*
* Returns 1 on success
*/
static int answer_call(unsigned call_reference, const char *token)
{
struct oh323_pvt *pvt = NULL;
struct ast_channel *c = NULL;
/* Find the call or allocate a private structure if call not found */
pvt = find_call(call_reference, token);
if (!pvt) {
ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
return 0;
}
/* allocate a channel and tell asterisk about it */
c = oh323_new(pvt, AST_STATE_RINGING, pvt->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;
}
/**
* Call-back function to signal asterisk that the channel is ringing
* Returns nothing
*/
void chan_ringing(unsigned call_reference, const char *token)
{
struct ast_channel *c = NULL;
struct oh323_pvt *pvt = NULL;
pvt = find_call(call_reference, token);
if (!pvt) {
ast_log(LOG_ERROR, "Something is wrong: ringing\n");
}
if (!pvt->owner) {
ast_log(LOG_ERROR, "Channel has no owner\n");
return;
}
c = pvt->owner;
ast_setstate(c, AST_STATE_RINGING);
ast_queue_control(c, AST_CONTROL_RINGING);
return;
}
void cleanup_call_details(call_details_t cd)
{
if (cd.call_token) {
free(cd.call_token);
}
if (cd.call_source_aliases) {
free(cd.call_source_aliases);
}
if (cd.call_dest_alias) {
free(cd.call_dest_alias);
}
if (cd.call_source_name) {
free(cd.call_source_name);
}
if (cd.call_source_e164) {
free(cd.call_source_e164);
}
if (cd.call_dest_e164) {
free(cd.call_dest_e164);
}
if (cd.sourceIp) {
free(cd.sourceIp);
}
}
/**
* Call-back function to cleanup communication
* Returns nothing,
*/
void cleanup_connection(call_details_t cd)
{
struct oh323_pvt *pvt = NULL;
struct ast_rtp *rtp = NULL;
pvt = find_call(cd.call_reference, cd.call_token);
if (!pvt) {
return;
}
ast_mutex_lock(&pvt->lock);
if (pvt->rtp) {
rtp = pvt->rtp;
pvt->rtp = NULL;
/* Immediately stop RTP */
ast_rtp_destroy(rtp);
}
cleanup_call_details(pvt->cd);
pvt->alreadygone = 1;
/* Send hangup */
if (pvt->owner) {
ast_queue_hangup(pvt->owner);
}
ast_mutex_unlock(&pvt->lock);
return;
}
static void *do_monitor(void *data)
{
int res;
int reloading;
struct oh323_pvt *oh323 = NULL;
for(;;) {
/* Check for a reload request */
ast_mutex_lock(&h323_reload_lock);
reloading = h323_reloading;
h323_reloading = 0;
ast_mutex_unlock(&h323_reload_lock);
if (reloading) {
if (option_verbose > 0) {
ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
}
h323_do_reload();
}
/* 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);
pthread_testcancel();
/* Wait for sched or io */
res = ast_sched_wait(sched);
if ((res < 0) || (res > 1000)) {
res = 1000;
}
res = ast_io_wait(io, res);
ast_mutex_lock(&monlock);
if (res >= 0) {
ast_sched_runq(sched);
}
ast_mutex_unlock(&monlock);
}
/* Never reached */
return NULL;
}
static int restart_monitor(void)
{
pthread_attr_t attr;
/* 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 {
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
/* Start a new monitor */
if (ast_pthread_create(&monitor_thread, &attr, 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 <level num>\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 <token>\n"
" Manually try to hang up call identified by <token>\n";
static char show_tokens_usage[] =
"Usage: h.323 show tokens\n"
" Print out all active call tokens\n";
static char h323_reload_usage[] =
"Usage: h323 reload\n"
" Reloads H.323 configuration from sip.conf\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")) {
h323_signalling_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")) {
bridging = ast_true(v->value);
} else if (!strcasecmp(v->name, "noFastStart")) {
noFastStart = ast_true(v->value);
} else if (!strcasecmp(v->name, "noH245Tunneling")) {
noH245Tunneling = 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);
}
ast_destroy(cfg);
/* 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 */
ast_mutex_lock(&caplock);
if(h323_set_capability(capability, dtmfmode)) {
ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
ast_mutex_unlock(&caplock);
return -1;
}
ast_mutex_unlock(&caplock);
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);
}
static int h323_reload(int fd, int argc, char *argv[])
{
ast_mutex_lock(&h323_reload_lock);
if (h323_reloading) {
ast_verbose("Previous H.323 reload not yet done\n");
} else {
h323_reloading = 1;
}
ast_mutex_unlock(&h323_reload_lock);
restart_monitor();
return 0;
}
static int h323_do_reload(void)
{
delete_users();
delete_aliases();
prune_peers();
reload_config();
restart_monitor();
return 0;
}
int reload(void)
{
return h323_reload(0, 0, NULL);
}
static struct ast_cli_entry cli_h323_reload =
{ { "h.323", "reload", NULL }, h323_reload, "Reload H.323 configuration", h323_reload_usage };
static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
{
struct oh323_pvt *p;
p = (struct oh323_pvt *) 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;
char iabuf[INET_ADDRSTRLEN];
mode = convertcap(chan->writeformat);
if (!rtp) {
return 0;
}
p = (struct oh323_pvt *) 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, ast_inet_ntoa(iabuf, sizeof(iabuf), 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;
ast_mutex_init(&userl.lock);
ast_mutex_init(&peerl.lock);
ast_mutex_init(&aliasl.lock);
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");
}
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);
ast_cli_register(&cli_h323_reload);
oh323_rtp.type = type;
ast_rtp_proto_register(&oh323_rtp);
/* Register our callback functions */
h323_callback_register(setup_incoming_call,
setup_outgoing_call,
external_rtp_create,
setup_rtp_connection,
cleanup_connection,
chan_ringing,
connection_made,
send_digit,
answer_call);
/* start the h.323 listener */
if (h323_start_listener(h323_signalling_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 */
ast_mutex_destroy(&pl->lock);
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);
ast_cli_unregister(&cli_h323_reload);
/* 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;
}
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