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Diffstat (limited to 'trunk/channels/chan_h323.c')
| -rw-r--r-- | trunk/channels/chan_h323.c | 3346 |
1 files changed, 3346 insertions, 0 deletions
diff --git a/trunk/channels/chan_h323.c b/trunk/channels/chan_h323.c new file mode 100644 index 000000000..bba205e91 --- /dev/null +++ b/trunk/channels/chan_h323.c @@ -0,0 +1,3346 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005 + * + * 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 + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief This file is part of the chan_h323 driver for Asterisk + * + * \author Jeremy McNamara + * + * \par See also + * \arg Config_h323 + * \extref OpenH323 http://www.voxgratia.org/ + * + * \ingroup channel_drivers + */ + +/*** MODULEINFO + <depend>openh323</depend> + <defaultenabled>yes</defaultenabled> + ***/ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#ifdef __cplusplus +} +#endif + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/signal.h> +#include <sys/param.h> +#include <arpa/inet.h> +#include <net/if.h> +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netdb.h> +#include <fcntl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#include "asterisk/lock.h" +#include "asterisk/channel.h" +#include "asterisk/config.h" +#include "asterisk/module.h" +#include "asterisk/musiconhold.h" +#include "asterisk/pbx.h" +#include "asterisk/utils.h" +#include "asterisk/sched.h" +#include "asterisk/io.h" +#include "asterisk/rtp.h" +#include "asterisk/acl.h" +#include "asterisk/callerid.h" +#include "asterisk/cli.h" +#include "asterisk/dsp.h" +#include "asterisk/causes.h" +#include "asterisk/stringfields.h" +#include "asterisk/abstract_jb.h" +#include "asterisk/astobj.h" + +#ifdef __cplusplus +} +#endif + +#include "h323/chan_h323.h" + +receive_digit_cb on_receive_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; +progress_cb on_progress; +rfc2833_cb on_set_rfc2833_payload; +hangup_cb on_hangup; +setcapabilities_cb on_setcapabilities; +setpeercapabilities_cb on_setpeercapabilities; +onhold_cb on_hold; + +int h323debug; /*!< global debug flag */ + +/*! \brief Global jitterbuffer configuration - by default, jb is disabled */ +static struct ast_jb_conf default_jbconf = +{ + .flags = 0, + .max_size = -1, + .resync_threshold = -1, + .impl = "" +}; +static struct ast_jb_conf global_jbconf; + +/** Variables required by Asterisk */ +static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver"; +static const char config[] = "h323.conf"; +static char default_context[AST_MAX_CONTEXT] = "default"; +static struct sockaddr_in bindaddr; + +#define GLOBAL_CAPABILITY (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_G726_AAL2 | AST_FORMAT_H261) + +/** 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 gkroute = 0; +/* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/ +static int userbyalias = 1; +static int acceptAnonymous = 1; +static unsigned int tos = 0; +static unsigned int cos = 0; +static char secret[50]; +static unsigned int unique = 0; + +static call_options_t global_options; + +/*! \brief 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 nonCodecCapability; /*!< non-audio capability */ + int outgoing; /*!< Outgoing or incoming call? */ + char exten[AST_MAX_EXTENSION]; /*!< Requested extension */ + char context[AST_MAX_CONTEXT]; /*!< Context where to start */ + char accountcode[256]; /*!< Account code */ + char rdnis[80]; /*!< Referring DNIS, if available */ + int amaflags; /*!< AMA Flags */ + struct ast_rtp *rtp; /*!< RTP Session */ + struct ast_dsp *vad; /*!< Used for in-band DTMF detection */ + int nativeformats; /*!< Codec formats supported by a channel */ + int needhangup; /*!< Send hangup when Asterisk is ready */ + int hangupcause; /*!< Hangup cause from OpenH323 layer */ + int newstate; /*!< Pending state change */ + int newcontrol; /*!< Pending control to send */ + int newdigit; /*!< Pending DTMF digit to send */ + int newduration; /*!< Pending DTMF digit duration to send */ + int pref_codec; /*!< Preferred codec */ + int peercapability; /*!< Capabilities learned from peer */ + int jointcapability; /*!< Common capabilities for local and remote side */ + struct ast_codec_pref peer_prefs; /*!< Preferenced list of codecs which remote side supports */ + int dtmf_pt[2]; /*!< Payload code used for RFC2833/CISCO messages */ + int curDTMF; /*!< DTMF tone being generated to Asterisk side */ + int DTMFsched; /*!< Scheduler descriptor for DTMF */ + int update_rtp_info; /*!< Configuration of fd's array is pending */ + int recvonly; /*!< Peer isn't wish to receive our voice stream */ + int txDtmfDigit; /*!< DTMF digit being to send to H.323 side */ + int noInbandDtmf; /*!< Inband DTMF processing by DSP isn't available */ + int connection_established; /*!< Call got CONNECT message */ + int got_progress; /*!< Call got PROGRESS message, pass inband audio */ + struct oh323_pvt *next; /*!< Next channel in list */ +} *iflist = NULL; + +/*! \brief H323 User list */ +static struct h323_user_list { + ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user); +} userl; + +/*! \brief H323 peer list */ +static struct h323_peer_list { + ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer); +} peerl; + +/*! \brief H323 alias list */ +static struct h323_alias_list { + ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias); +} aliasl; + +/* Asterisk RTP stuff */ +static struct sched_context *sched; +static struct io_context *io; + +AST_MUTEX_DEFINE_STATIC(iflock); /*!< Protect the interface list (oh323_pvt) */ + +/*! \brief Protect the H.323 monitoring thread, so only one process can kill or start it, and not + when it's doing something critical. */ +AST_MUTEX_DEFINE_STATIC(monlock); + +/*! \brief 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); + +/*! \brief Protect the reload process */ +AST_MUTEX_DEFINE_STATIC(h323_reload_lock); +static int h323_reloading = 0; + +/*! \brief 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 delete_users(void); +static void delete_aliases(void); +static void prune_peers(void); + +static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause); +static int oh323_digit_begin(struct ast_channel *c, char digit); +static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration); +static int oh323_call(struct ast_channel *c, char *dest, int timeout); +static int oh323_hangup(struct ast_channel *c); +static int oh323_answer(struct ast_channel *c); +static struct ast_frame *oh323_read(struct ast_channel *c); +static int oh323_write(struct ast_channel *c, struct ast_frame *frame); +static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen); +static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan); + +static const struct ast_channel_tech oh323_tech = { + .type = "H323", + .description = tdesc, + .capabilities = AST_FORMAT_AUDIO_MASK, + .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER, + .requester = oh323_request, + .send_digit_begin = oh323_digit_begin, + .send_digit_end = oh323_digit_end, + .call = oh323_call, + .hangup = oh323_hangup, + .answer = oh323_answer, + .read = oh323_read, + .write = oh323_write, + .indicate = oh323_indicate, + .fixup = oh323_fixup, + /* disable, for now */ +#if 0 + .bridge = ast_rtp_bridge, +#endif +}; + +static const char* redirectingreason2str(int redirectingreason) +{ + switch (redirectingreason) { + case 0: + return "UNKNOWN"; + case 1: + return "BUSY"; + case 2: + return "NO_REPLY"; + case 0xF: + return "UNCONDITIONAL"; + default: + return "NOREDIRECT"; + } +} + +static void oh323_destroy_alias(struct oh323_alias *alias) +{ + if (h323debug) + ast_debug(1, "Destroying alias '%s'\n", alias->name); + ast_free(alias); +} + +static void oh323_destroy_user(struct oh323_user *user) +{ + if (h323debug) + ast_debug(1, "Destroying user '%s'\n", user->name); + ast_free_ha(user->ha); + ast_free(user); +} + +static void oh323_destroy_peer(struct oh323_peer *peer) +{ + if (h323debug) + ast_debug(1, "Destroying peer '%s'\n", peer->name); + ast_free_ha(peer->ha); + ast_free(peer); +} + +static int oh323_simulate_dtmf_end(const void *data) +{ + struct oh323_pvt *pvt = (struct oh323_pvt *)data; + + if (pvt) { + ast_mutex_lock(&pvt->lock); + /* Don't hold pvt lock while trying to lock the channel */ + while(pvt->owner && ast_channel_trylock(pvt->owner)) { + ast_mutex_unlock(&pvt->lock); + usleep(1); + ast_mutex_lock(&pvt->lock); + } + + if (pvt->owner) { + struct ast_frame f = { + .frametype = AST_FRAME_DTMF_END, + .subclass = pvt->curDTMF, + .samples = 0, + .src = "SIMULATE_DTMF_END", + }; + ast_queue_frame(pvt->owner, &f); + ast_channel_unlock(pvt->owner); + } + + pvt->DTMFsched = -1; + ast_mutex_unlock(&pvt->lock); + } + + return 0; +} + +/*! \brief Channel and private structures should be already locked */ +static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt) +{ + if (c->nativeformats != pvt->nativeformats) { + if (h323debug) + ast_debug(1, "Preparing %s for new native format\n", c->name); + c->nativeformats = pvt->nativeformats; + ast_set_read_format(c, c->readformat); + ast_set_write_format(c, c->writeformat); + } + if (pvt->needhangup) { + if (h323debug) + ast_debug(1, "Process pending hangup for %s\n", c->name); + c->_softhangup |= AST_SOFTHANGUP_DEV; + c->hangupcause = pvt->hangupcause; + ast_queue_hangup(c); + pvt->needhangup = 0; + pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1; + } + if (pvt->newstate >= 0) { + ast_setstate(c, pvt->newstate); + pvt->newstate = -1; + } + if (pvt->newcontrol >= 0) { + ast_queue_control(c, pvt->newcontrol); + pvt->newcontrol = -1; + } + if (pvt->newdigit >= 0) { + struct ast_frame f = { + .frametype = AST_FRAME_DTMF_END, + .subclass = pvt->newdigit, + .samples = pvt->newduration * 8, + .len = pvt->newduration, + .src = "UPDATE_INFO", + }; + if (pvt->newdigit == ' ') { /* signalUpdate message */ + f.subclass = pvt->curDTMF; + if (pvt->DTMFsched >= 0) { + AST_SCHED_DEL(sched, pvt->DTMFsched); + } + } else { /* Regular input or signal message */ + if (pvt->newduration) { /* This is a signal, signalUpdate follows */ + f.frametype = AST_FRAME_DTMF_BEGIN; + AST_SCHED_DEL(sched, pvt->DTMFsched); + pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt); + if (h323debug) + ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched); + } + pvt->curDTMF = pvt->newdigit; + } + ast_queue_frame(c, &f); + pvt->newdigit = -1; + } + if (pvt->update_rtp_info > 0) { + if (pvt->rtp) { + ast_jb_configure(c, &global_jbconf); + ast_channel_set_fd(c, 0, ast_rtp_fd(pvt->rtp)); + ast_channel_set_fd(c, 1, ast_rtcp_fd(pvt->rtp)); + ast_queue_frame(pvt->owner, &ast_null_frame); /* Tell Asterisk to apply changes */ + } + pvt->update_rtp_info = -1; + } +} + +/*! \brief Only channel structure should be locked */ +static void oh323_update_info(struct ast_channel *c) +{ + struct oh323_pvt *pvt = c->tech_pvt; + + if (pvt) { + ast_mutex_lock(&pvt->lock); + __oh323_update_info(c, pvt); + ast_mutex_unlock(&pvt->lock); + } +} + +static void cleanup_call_details(call_details_t *cd) +{ + if (cd->call_token) { + ast_free(cd->call_token); + cd->call_token = NULL; + } + if (cd->call_source_aliases) { + ast_free(cd->call_source_aliases); + cd->call_source_aliases = NULL; + } + if (cd->call_dest_alias) { + ast_free(cd->call_dest_alias); + cd->call_dest_alias = NULL; + } + if (cd->call_source_name) { + ast_free(cd->call_source_name); + cd->call_source_name = NULL; + } + if (cd->call_source_e164) { + ast_free(cd->call_source_e164); + cd->call_source_e164 = NULL; + } + if (cd->call_dest_e164) { + ast_free(cd->call_dest_e164); + cd->call_dest_e164 = NULL; + } + if (cd->sourceIp) { + ast_free(cd->sourceIp); + cd->sourceIp = NULL; + } + if (cd->redirect_number) { + ast_free(cd->redirect_number); + cd->redirect_number = NULL; + } +} + +static void __oh323_destroy(struct oh323_pvt *pvt) +{ + struct oh323_pvt *cur, *prev = NULL; + + AST_SCHED_DEL(sched, pvt->DTMFsched); + + if (pvt->rtp) { + ast_rtp_destroy(pvt->rtp); + } + + /* Free dsp used for in-band DTMF detection */ + if (pvt->vad) { + ast_dsp_free(pvt->vad); + } + cleanup_call_details(&pvt->cd); + + /* Unlink us from the owner if we have one */ + if (pvt->owner) { + ast_channel_lock(pvt->owner); + if (h323debug) + ast_debug(1, "Detaching from %s\n", pvt->owner->name); + pvt->owner->tech_pvt = NULL; + ast_channel_unlock(pvt->owner); + } + cur = iflist; + while(cur) { + if (cur == pvt) { + 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_unlock(&pvt->lock); + ast_mutex_destroy(&pvt->lock); + ast_free(pvt); + } +} + +static void oh323_destroy(struct oh323_pvt *pvt) +{ + if (h323debug) { + ast_debug(1, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>")); + } + ast_mutex_lock(&iflock); + ast_mutex_lock(&pvt->lock); + __oh323_destroy(pvt); + ast_mutex_unlock(&iflock); +} + +static int oh323_digit_begin(struct ast_channel *c, char digit) +{ + struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt; + char *token; + + if (!pvt) { + ast_log(LOG_ERROR, "No private structure?! This is bad\n"); + return -1; + } + ast_mutex_lock(&pvt->lock); + if (pvt->rtp && + (((pvt->options.dtmfmode & H323_DTMF_RFC2833) && pvt->dtmf_pt[0]) + /*|| ((pvt->options.dtmfmode & H323_DTMF_CISCO) && pvt->dtmf_pt[1]))*/)) { + /* out-of-band DTMF */ + if (h323debug) { + ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name); + } + ast_rtp_senddigit_begin(pvt->rtp, digit); + ast_mutex_unlock(&pvt->lock); + } else if (pvt->txDtmfDigit != digit) { + /* in-band DTMF */ + if (h323debug) { + ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name); + } + pvt->txDtmfDigit = digit; + token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL; + ast_mutex_unlock(&pvt->lock); + h323_send_tone(token, digit); + if (token) { + ast_free(token); + } + } else + ast_mutex_unlock(&pvt->lock); + oh323_update_info(c); + return 0; +} + +/*! \brief + * Send (play) the specified digit to the channel. + * + */ +static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration) +{ + struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt; + char *token; + + if (!pvt) { + ast_log(LOG_ERROR, "No private structure?! This is bad\n"); + return -1; + } + ast_mutex_lock(&pvt->lock); + if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && ((pvt->dtmf_pt[0] > 0) || (pvt->dtmf_pt[0] > 0))) { + /* out-of-band DTMF */ + if (h323debug) { + ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s, duration %d\n", digit, c->name, duration); + } + ast_rtp_senddigit_end(pvt->rtp, digit); + ast_mutex_unlock(&pvt->lock); + } else { + /* in-band DTMF */ + if (h323debug) { + ast_log(LOG_DTMF, "End sending inband digit %c on %s, duration %d\n", digit, c->name, duration); + } + pvt->txDtmfDigit = ' '; + token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL; + ast_mutex_unlock(&pvt->lock); + h323_send_tone(token, ' '); + if (token) { + ast_free(token); + } + } + oh323_update_info(c); + return 0; +} + +/*! \brief + * 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->tech_pvt; + const char *addr; + char called_addr[1024]; + + if (h323debug) { + ast_debug(1, "Calling to %s on %s\n", dest, c->name); + } + 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; + } + ast_mutex_lock(&pvt->lock); + if (!gatekeeper_disable) { + if (ast_strlen_zero(pvt->exten)) { + ast_copy_string(called_addr, dest, sizeof(called_addr)); + } else { + snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest); + } + } else { + res = htons(pvt->sa.sin_port); + addr = ast_inet_ntoa(pvt->sa.sin_addr); + if (ast_strlen_zero(pvt->exten)) { + snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res); + } else { + snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res); + } + } + /* make sure null terminated */ + called_addr[sizeof(called_addr) - 1] = '\0'; + + if (c->cid.cid_num) + ast_copy_string(pvt->options.cid_num, c->cid.cid_num, sizeof(pvt->options.cid_num)); + + if (c->cid.cid_name) + ast_copy_string(pvt->options.cid_name, c->cid.cid_name, sizeof(pvt->options.cid_name)); + + if (c->cid.cid_rdnis) { + ast_copy_string(pvt->options.cid_rdnis, c->cid.cid_rdnis, sizeof(pvt->options.cid_rdnis)); + } + + pvt->options.presentation = c->cid.cid_pres; + pvt->options.type_of_number = c->cid.cid_ton; + + if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) { + if (!strcasecmp(addr, "UNKNOWN")) + pvt->options.redirect_reason = 0; + else if (!strcasecmp(addr, "BUSY")) + pvt->options.redirect_reason = 1; + else if (!strcasecmp(addr, "NO_REPLY")) + pvt->options.redirect_reason = 2; + else if (!strcasecmp(addr, "UNCONDITIONAL")) + pvt->options.redirect_reason = 15; + else + pvt->options.redirect_reason = -1; + } else + pvt->options.redirect_reason = -1; + + pvt->options.transfer_capability = c->transfercapability; + + /* indicate that this is an outgoing call */ + pvt->outgoing = 1; + + ast_verb(3, "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability)); + if (h323debug) + ast_debug(1, "Placing outgoing call to %s, %d/%d\n", called_addr, pvt->options.dtmfcodec[0], pvt->options.dtmfcodec[1]); + ast_mutex_unlock(&pvt->lock); + 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; + } + oh323_update_info(c); + return 0; +} + +static int oh323_answer(struct ast_channel *c) +{ + int res; + struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt; + char *token; + + if (h323debug) + ast_debug(1, "Answering on %s\n", c->name); + + ast_mutex_lock(&pvt->lock); + token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL; + ast_mutex_unlock(&pvt->lock); + res = h323_answering_call(token, 0); + if (token) + ast_free(token); + + oh323_update_info(c); + 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->tech_pvt; + int q931cause = AST_CAUSE_NORMAL_CLEARING; + char *call_token; + + + if (h323debug) + ast_debug(1, "Hanging up and scheduling destroy of call %s\n", c->name); + + if (!c->tech_pvt) { + ast_log(LOG_WARNING, "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; + } + + pvt->owner = NULL; + c->tech_pvt = NULL; + + if (c->hangupcause) { + q931cause = c->hangupcause; + } else { + const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS"); + if (cause) { + if (!strcmp(cause, "CONGESTION")) { + q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION; + } else if (!strcmp(cause, "BUSY")) { + q931cause = AST_CAUSE_USER_BUSY; + } else if (!strcmp(cause, "CHANISUNVAIL")) { + q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL; + } else if (!strcmp(cause, "NOANSWER")) { + q931cause = AST_CAUSE_NO_ANSWER; + } else if (!strcmp(cause, "CANCEL")) { + q931cause = AST_CAUSE_CALL_REJECTED; + } + } + } + + /* Start the process if it's not already started */ + if (!pvt->alreadygone && !pvt->hangupcause) { + call_token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL; + if (call_token) { + /* Release lock to eliminate deadlock */ + ast_mutex_unlock(&pvt->lock); + if (h323_clear_call(call_token, q931cause)) { + ast_log(LOG_WARNING, "ClearCall failed.\n"); + } + ast_free(call_token); + ast_mutex_lock(&pvt->lock); + } + } + pvt->needdestroy = 1; + ast_mutex_unlock(&pvt->lock); + + /* Update usage counter */ + ast_module_unref(ast_module_info->self); + + return 0; +} + +/*! \brief Retrieve audio/etc from channel. Assumes pvt->lock is already held. */ +static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt) +{ + struct ast_frame *f; + + /* Only apply it for the first packet, we just need the correct ip/port */ + if (pvt->options.nat) { + ast_rtp_setnat(pvt->rtp, pvt->options.nat); + pvt->options.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->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO))) { + return &ast_null_frame; + } + if (pvt->owner) { + /* We already hold the channel lock */ + if (f->frametype == AST_FRAME_VOICE) { + if (f->subclass != pvt->owner->nativeformats) { + /* Try to avoid deadlock */ + if (ast_channel_trylock(pvt->owner)) { + ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n"); + return &ast_null_frame; + } + if (h323debug) + ast_debug(1, "Oooh, format changed to %d\n", f->subclass); + pvt->owner->nativeformats = f->subclass; + pvt->nativeformats = f->subclass; + ast_set_read_format(pvt->owner, pvt->owner->readformat); + ast_set_write_format(pvt->owner, pvt->owner->writeformat); + ast_channel_unlock(pvt->owner); + } + /* Do in-band DTMF detection */ + if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) { + if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) { + if (!ast_channel_trylock(pvt->owner)) { + f = ast_dsp_process(pvt->owner, pvt->vad, f); + ast_channel_unlock(pvt->owner); + } + else + ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n"); + } else if (pvt->nativeformats && !pvt->noInbandDtmf) { + ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(f->subclass)); + pvt->noInbandDtmf = 1; + } + if (f &&(f->frametype == AST_FRAME_DTMF)) { + if (h323debug) + ast_log(LOG_DTMF, "Received 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->tech_pvt; + ast_mutex_lock(&pvt->lock); + __oh323_update_info(c, pvt); + switch(c->fdno) { + case 0: + fr = oh323_rtp_read(pvt); + break; + case 1: + if (pvt->rtp) + fr = ast_rtcp_read(pvt->rtp); + else + fr = &ast_null_frame; + break; + default: + ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name); + fr = &ast_null_frame; + break; + } + 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->tech_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 0; + } + } + if (pvt) { + ast_mutex_lock(&pvt->lock); + if (pvt->rtp && !pvt->recvonly) + res = ast_rtp_write(pvt->rtp, frame); + __oh323_update_info(c, pvt); + ast_mutex_unlock(&pvt->lock); + } + return res; +} + +static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen) +{ + + struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt; + char *token = (char *)NULL; + int res = -1; + int got_progress; + + ast_mutex_lock(&pvt->lock); + token = (pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL); + got_progress = pvt->got_progress; + if (condition == AST_CONTROL_PROGRESS) + pvt->got_progress = 1; + else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION)) + pvt->alreadygone = 1; + ast_mutex_unlock(&pvt->lock); + + if (h323debug) + ast_debug(1, "OH323: Indicating %d on %s (%s)\n", condition, token, c->name); + + switch(condition) { + case AST_CONTROL_RINGING: + if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) { + h323_send_alerting(token); + res = (got_progress ? 0 : -1); /* Do not simulate any audio tones if we got PROGRESS message */ + } + break; + case AST_CONTROL_PROGRESS: + if (c->_state != AST_STATE_UP) { + /* Do not send PROGRESS message more than once */ + if (!got_progress) + h323_send_progress(token); + res = 0; + } + break; + case AST_CONTROL_BUSY: + if (c->_state != AST_STATE_UP) { + h323_answering_call(token, 1); + ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV); + res = 0; + } + break; + case AST_CONTROL_CONGESTION: + if (c->_state != AST_STATE_UP) { + h323_answering_call(token, 1); + ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV); + res = 0; + } + break; + case AST_CONTROL_HOLD: + h323_hold_call(token, 1); + /* We should start MOH only if remote party isn't provide audio for us */ + ast_moh_start(c, data, NULL); + res = 0; + break; + case AST_CONTROL_UNHOLD: + h323_hold_call(token, 0); + ast_moh_stop(c); + res = 0; + break; + case AST_CONTROL_PROCEEDING: + case -1: + break; + default: + ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token); + break; + } + + if (h323debug) + ast_debug(1, "OH323: Indicated %d on %s, res=%d\n", condition, token, res); + if (token) + ast_free(token); + oh323_update_info(c); + + return res; +} + +static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan) +{ + struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_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 int __oh323_rtp_create(struct oh323_pvt *pvt) +{ + struct in_addr our_addr; + + if (pvt->rtp) + return 0; + + if (ast_find_ourip(&our_addr, bindaddr)) { + ast_mutex_unlock(&pvt->lock); + ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n"); + return -1; + } + pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr); + if (!pvt->rtp) { + ast_mutex_unlock(&pvt->lock); + ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno)); + return -1; + } + if (h323debug) + ast_debug(1, "Created RTP channel\n"); + + ast_rtp_setqos(pvt->rtp, tos, cos, "H323 RTP"); + + if (h323debug) + ast_debug(1, "Setting NAT on RTP to %d\n", pvt->options.nat); + ast_rtp_setnat(pvt->rtp, pvt->options.nat); + + if (pvt->dtmf_pt[0] > 0) + ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[0], "audio", "telephone-event", 0); + if (pvt->dtmf_pt[1] > 0) + ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[1], "audio", "cisco-telephone-event", 0); + + if (pvt->peercapability) + ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs); + + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + ast_jb_configure(pvt->owner, &global_jbconf); + ast_channel_set_fd(pvt->owner, 0, ast_rtp_fd(pvt->rtp)); + ast_channel_set_fd(pvt->owner, 1, ast_rtcp_fd(pvt->rtp)); + ast_queue_frame(pvt->owner, &ast_null_frame); /* Tell Asterisk to apply changes */ + ast_channel_unlock(pvt->owner); + } else + pvt->update_rtp_info = 1; + + return 0; +} + +/*! \brief Private structure should be locked on a call */ +static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host) +{ + struct ast_channel *ch; + char *cid_num, *cid_name; + int fmt; + + if (!ast_strlen_zero(pvt->options.cid_num)) + cid_num = pvt->options.cid_num; + else + cid_num = pvt->cd.call_source_e164; + + if (!ast_strlen_zero(pvt->options.cid_name)) + cid_name = pvt->options.cid_name; + else + cid_name = pvt->cd.call_source_name; + + /* Don't hold a oh323_pvt lock while we allocate a chanel */ + ast_mutex_unlock(&pvt->lock); + ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, pvt->amaflags, "H323/%s", host); + /* Update usage counter */ + ast_module_ref(ast_module_info->self); + ast_mutex_lock(&pvt->lock); + if (ch) { + ch->tech = &oh323_tech; + if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability)) + fmt = global_options.capability; + ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/; + pvt->nativeformats = ch->nativeformats; + fmt = ast_best_codec(ch->nativeformats); + ch->writeformat = fmt; + ch->rawwriteformat = fmt; + ch->readformat = fmt; + ch->rawreadformat = fmt; + if (!pvt->rtp) + __oh323_rtp_create(pvt); +#if 0 + ast_channel_set_fd(ch, 0, ast_rtp_fd(pvt->rtp)); + ast_channel_set_fd(ch, 1, ast_rtcp_fd(pvt->rtp)); +#endif +#ifdef VIDEO_SUPPORT + if (pvt->vrtp) { + ast_channel_set_fd(ch, 2, ast_rtp_fd(pvt->vrtp)); + ast_channel_set_fd(ch, 3, ast_rtcp_fd(pvt->vrtp)); + } +#endif +#ifdef T38_SUPPORT + if (pvt->udptl) { + ast_channel_set_fd(ch, 4, ast_udptl_fd(pvt->udptl)); + } +#endif + if (state == AST_STATE_RING) { + ch->rings = 1; + } + /* Allocate dsp for in-band DTMF support */ + if (pvt->options.dtmfmode & H323_DTMF_INBAND) { + pvt->vad = ast_dsp_new(); + ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT); + } + /* Register channel functions. */ + ch->tech_pvt = pvt; + /* Set the owner of this channel */ + pvt->owner = ch; + + ast_copy_string(ch->context, pvt->context, sizeof(ch->context)); + ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten)); + ch->priority = 1; + if (!ast_strlen_zero(pvt->accountcode)) { + ast_string_field_set(ch, accountcode, pvt->accountcode); + } + if (pvt->amaflags) { + ch->amaflags = pvt->amaflags; + } + + /* Don't use ast_set_callerid() here because it will + * generate a needless NewCallerID event */ + ch->cid.cid_ani = ast_strdup(cid_num); + + if (pvt->cd.redirect_reason >= 0) { + ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number); + pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason)); + } + ch->cid.cid_pres = pvt->cd.presentation; + ch->cid.cid_ton = pvt->cd.type_of_number; + + if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) { + ch->cid.cid_dnid = ast_strdup(pvt->exten); + } + if (pvt->cd.transfer_capability >= 0) + ch->transfercapability = pvt->cd.transfer_capability; + 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 = ast_calloc(1, sizeof(*pvt)); + if (!pvt) { + ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n"); + return NULL; + } + pvt->cd.redirect_reason = -1; + pvt->cd.transfer_capability = -1; + /* Ensure the call token is allocated for outgoing call */ + if (!callid) { + if ((pvt->cd).call_token == NULL) { + (pvt->cd).call_token = ast_calloc(1, 128); + } + if (!pvt->cd.call_token) { + ast_log(LOG_ERROR, "Not enough memory to alocate call token\n"); + ast_rtp_destroy(pvt->rtp); + ast_free(pvt); + return NULL; + } + memset((char *)(pvt->cd).call_token, 0, 128); + pvt->cd.call_reference = callid; + } + memcpy(&pvt->options, &global_options, sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + if (pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO)) { + pvt->nonCodecCapability |= AST_RTP_DTMF; + } else { + pvt->nonCodecCapability &= ~AST_RTP_DTMF; + } + ast_copy_string(pvt->context, default_context, sizeof(pvt->context)); + pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1; + ast_mutex_init(&pvt->lock); + /* 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_locked(int call_reference, const char *token) +{ + struct oh323_pvt *pvt; + + ast_mutex_lock(&iflock); + pvt = iflist; + while(pvt) { + if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) { + /* Found the call */ + if ((token != NULL) && (!strcmp(pvt->cd.call_token, token))) { + ast_mutex_lock(&pvt->lock); + ast_mutex_unlock(&iflock); + return pvt; + } else if (token == NULL) { + ast_log(LOG_WARNING, "Call Token is NULL\n"); + ast_mutex_lock(&pvt->lock); + ast_mutex_unlock(&iflock); + return pvt; + } + } + pvt = pvt->next; + } + ast_mutex_unlock(&iflock); + return NULL; +} + +static int update_state(struct oh323_pvt *pvt, int state, int signal) +{ + if (!pvt) + return 0; + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + if (state >= 0) + ast_setstate(pvt->owner, state); + if (signal >= 0) + ast_queue_control(pvt->owner, signal); + ast_channel_unlock(pvt->owner); + return 1; + } + else { + if (state >= 0) + pvt->newstate = state; + if (signal >= 0) + pvt->newcontrol = signal; + return 0; + } +} + +static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime) +{ + struct oh323_alias *alias; + int found = 0; + + alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp); + + if (alias) + found++; + else { + if (!(alias = ast_calloc(1, sizeof(*alias)))) + return NULL; + ASTOBJ_INIT(alias); + } + if (!found && name) + ast_copy_string(alias->name, name, sizeof(alias->name)); + for (; v || ((v = alt) && !(alt = NULL)); v = v->next) { + if (!strcasecmp(v->name, "e164")) { + ast_copy_string(alias->e164, v->value, sizeof(alias->e164)); + } else if (!strcasecmp(v->name, "prefix")) { + ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix)); + } else if (!strcasecmp(v->name, "context")) { + ast_copy_string(alias->context, v->value, sizeof(alias->context)); + } else if (!strcasecmp(v->name, "secret")) { + ast_copy_string(alias->secret, v->value, sizeof(alias->secret)); + } else { + if (strcasecmp(v->value, "h323")) { + ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name); + } + } + } + ASTOBJ_UNMARK(alias); + return alias; +} + +static struct oh323_alias *realtime_alias(const char *alias) +{ + struct ast_variable *var, *tmp; + struct oh323_alias *a; + + var = ast_load_realtime("h323", "name", alias, NULL); + + if (!var) + return NULL; + + for (tmp = var; tmp; tmp = tmp->next) { + if (!strcasecmp(tmp->name, "type") && + !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) { + ast_variables_destroy(var); + return NULL; + } + } + + a = build_alias(alias, var, NULL, 1); + + ast_variables_destroy(var); + + return a; +} + +static int update_common_options(struct ast_variable *v, struct call_options *options) +{ + int tmp; + char *val, *opt; + + if (!strcasecmp(v->name, "allow")) { + ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1); + } else if (!strcasecmp(v->name, "disallow")) { + ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0); + } else if (!strcasecmp(v->name, "dtmfmode")) { + val = ast_strdupa(v->value); + if ((opt = strchr(val, ':')) != (char *)NULL) { + *opt++ = '\0'; + tmp = atoi(opt); + } + if (!strcasecmp(v->value, "inband")) { + options->dtmfmode |= H323_DTMF_INBAND; + } else if (!strcasecmp(val, "rfc2833")) { + options->dtmfmode |= H323_DTMF_RFC2833; + if (!opt) { + options->dtmfcodec[0] = H323_DTMF_RFC2833_PT; + } else if ((tmp >= 96) && (tmp < 128)) { + options->dtmfcodec[0] = tmp; + } else { + options->dtmfcodec[0] = H323_DTMF_RFC2833_PT; + ast_log(LOG_WARNING, "Unknown rfc2833 payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[0]); + } + } else if (!strcasecmp(val, "cisco")) { + options->dtmfmode |= H323_DTMF_CISCO; + if (!opt) { + options->dtmfcodec[1] = H323_DTMF_CISCO_PT; + } else if ((tmp >= 96) && (tmp < 128)) { + options->dtmfcodec[1] = tmp; + } else { + options->dtmfcodec[1] = H323_DTMF_CISCO_PT; + ast_log(LOG_WARNING, "Unknown Cisco DTMF payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[1]); + } + } else if (!strcasecmp(v->value, "h245-signal")) { + options->dtmfmode |= H323_DTMF_SIGNAL; + } else { + ast_log(LOG_WARNING, "Unknown dtmf mode '%s' at line %d\n", v->value, v->lineno); + } + } else if (!strcasecmp(v->name, "dtmfcodec")) { + ast_log(LOG_NOTICE, "Option %s at line %d is deprecated. Use dtmfmode=rfc2833[:<payload>] instead.\n", v->name, v->lineno); + tmp = atoi(v->value); + if (tmp < 96) + ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno); + else + options->dtmfcodec[0] = tmp; + } else if (!strcasecmp(v->name, "bridge")) { + options->bridge = ast_true(v->value); + } else if (!strcasecmp(v->name, "nat")) { + options->nat = ast_true(v->value); + } else if (!strcasecmp(v->name, "fastStart")) { + options->fastStart = ast_true(v->value); + } else if (!strcasecmp(v->name, "h245Tunneling")) { + options->h245Tunneling = ast_true(v->value); + } else if (!strcasecmp(v->name, "silenceSuppression")) { + options->silenceSuppression = ast_true(v->value); + } else if (!strcasecmp(v->name, "progress_setup")) { + tmp = atoi(v->value); + if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) { + ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno); + tmp = 0; + } + options->progress_setup = tmp; + } else if (!strcasecmp(v->name, "progress_alert")) { + tmp = atoi(v->value); + if ((tmp != 0) && (tmp != 1) && (tmp != 8)) { + ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno); + tmp = 0; + } + options->progress_alert = tmp; + } else if (!strcasecmp(v->name, "progress_audio")) { + options->progress_audio = ast_true(v->value); + } else if (!strcasecmp(v->name, "callerid")) { + ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num)); + } else if (!strcasecmp(v->name, "fullname")) { + ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name)); + } else if (!strcasecmp(v->name, "cid_number")) { + ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num)); + } else if (!strcasecmp(v->name, "tunneling")) { + if (!strcasecmp(v->value, "none")) + options->tunnelOptions = 0; + else if (!strcasecmp(v->value, "cisco")) + options->tunnelOptions |= H323_TUNNEL_CISCO; + else if (!strcasecmp(v->value, "qsig")) + options->tunnelOptions |= H323_TUNNEL_QSIG; + else + ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno); + } else if (!strcasecmp(v->name, "hold")) { + if (!strcasecmp(v->value, "none")) + options->holdHandling = ~0; + else if (!strcasecmp(v->value, "notify")) + options->holdHandling |= H323_HOLD_NOTIFY; + else if (!strcasecmp(v->value, "q931only")) + options->holdHandling |= H323_HOLD_NOTIFY | H323_HOLD_Q931ONLY; + else if (!strcasecmp(v->value, "h450")) + options->holdHandling |= H323_HOLD_H450; + else + ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno); + } else + return 1; + + return 0; +} + +static struct oh323_user *build_user(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime) +{ + struct oh323_user *user; + struct ast_ha *oldha; + int found = 0; + int format; + + user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp); + + if (user) + found++; + else { + if (!(user = ast_calloc(1, sizeof(*user)))) + return NULL; + ASTOBJ_INIT(user); + } + oldha = user->ha; + user->ha = (struct ast_ha *)NULL; + memcpy(&user->options, &global_options, sizeof(user->options)); + user->options.dtmfmode = 0; + user->options.holdHandling = 0; + /* Set default context */ + ast_copy_string(user->context, default_context, sizeof(user->context)); + if (user && !found) + ast_copy_string(user->name, name, sizeof(user->name)); + +#if 0 /* XXX Port channel variables functionality from chan_sip XXX */ + if (user->chanvars) { + ast_variables_destroy(user->chanvars); + user->chanvars = NULL; + } +#endif + + for (; v || ((v = alt) && !(alt = NULL)); v = v->next) { + if (!update_common_options(v, &user->options)) + continue; + if (!strcasecmp(v->name, "context")) { + ast_copy_string(user->context, v->value, sizeof(user->context)); + } else if (!strcasecmp(v->name, "secret")) { + ast_copy_string(user->secret, v->value, sizeof(user->secret)); + } else if (!strcasecmp(v->name, "accountcode")) { + ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode)); + } 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"); + ASTOBJ_UNREF(user, oh323_destroy_user); + return NULL; + } else if (ast_get_ip(&user->addr, v->value)) { + ASTOBJ_UNREF(user, oh323_destroy_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; + } + } else if (!strcasecmp(v->name, "permit") || + !strcasecmp(v->name, "deny")) { + int ha_error = 0; + + user->ha = ast_append_ha(v->name, v->value, user->ha, &ha_error); + if (ha_error) + ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value); + } + } + if (!user->options.dtmfmode) + user->options.dtmfmode = global_options.dtmfmode; + if (user->options.holdHandling == ~0) + user->options.holdHandling = 0; + else if (!user->options.holdHandling) + user->options.holdHandling = global_options.holdHandling; + ASTOBJ_UNMARK(user); + ast_free_ha(oldha); + return user; +} + +static struct oh323_user *realtime_user(const call_details_t *cd) +{ + struct ast_variable *var, *tmp; + struct oh323_user *user; + const char *username; + + if (userbyalias) + var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, NULL); + else { + username = (char *)NULL; + var = ast_load_realtime("h323", "host", cd->sourceIp, NULL); + } + + if (!var) + return NULL; + + for (tmp = var; tmp; tmp = tmp->next) { + if (!strcasecmp(tmp->name, "type") && + !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) { + ast_variables_destroy(var); + return NULL; + } else if (!username && !strcasecmp(tmp->name, "name")) + username = tmp->value; + } + + if (!username) { + ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp); + ast_variables_destroy(var); + return NULL; + } + + user = build_user(username, var, NULL, 1); + + ast_variables_destroy(var); + + return user; +} + +static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime) +{ + struct oh323_peer *peer; + struct ast_ha *oldha; + int found = 0; + + peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp); + + if (peer) + found++; + else { + if (!(peer = ast_calloc(1, sizeof(*peer)))) + return NULL; + ASTOBJ_INIT(peer); + } + oldha = peer->ha; + peer->ha = NULL; + memcpy(&peer->options, &global_options, sizeof(peer->options)); + peer->options.dtmfmode = 0; + peer->options.holdHandling = 0; + peer->addr.sin_port = htons(h323_signalling_port); + peer->addr.sin_family = AF_INET; + if (!found && name) + ast_copy_string(peer->name, name, sizeof(peer->name)); + +#if 0 /* XXX Port channel variables functionality from chan_sip XXX */ + if (peer->chanvars) { + ast_variables_destroy(peer->chanvars); + peer->chanvars = NULL; + } +#endif + /* Default settings for mailbox */ + peer->mailbox[0] = '\0'; + + for (; v || ((v = alt) && !(alt = NULL)); v = v->next) { + if (!update_common_options(v, &peer->options)) + continue; + if (!strcasecmp(v->name, "host")) { + if (!strcasecmp(v->value, "dynamic")) { + ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n"); + ASTOBJ_UNREF(peer, oh323_destroy_peer); + return NULL; + } + if (ast_get_ip(&peer->addr, v->value)) { + ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value); + ASTOBJ_UNREF(peer, oh323_destroy_peer); + return NULL; + } + } else if (!strcasecmp(v->name, "port")) { + peer->addr.sin_port = htons(atoi(v->value)); + } else if (!strcasecmp(v->name, "permit") || + !strcasecmp(v->name, "deny")) { + int ha_error = 0; + + peer->ha = ast_append_ha(v->name, v->value, peer->ha, &ha_error); + if (ha_error) + ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value); + } else if (!strcasecmp(v->name, "mailbox")) { + ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox)); + } + } + if (!peer->options.dtmfmode) + peer->options.dtmfmode = global_options.dtmfmode; + if (peer->options.holdHandling == ~0) + peer->options.holdHandling = 0; + else if (!peer->options.holdHandling) + peer->options.holdHandling = global_options.holdHandling; + ASTOBJ_UNMARK(peer); + ast_free_ha(oldha); + return peer; +} + +static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin) +{ + struct oh323_peer *peer; + struct ast_variable *var; + struct ast_variable *tmp; + const char *addr; + + /* First check on peer name */ + if (peername) + var = ast_load_realtime("h323", "name", peername, addr = NULL); + else if (sin) /* Then check on IP address for dynamic peers */ + var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL); + else + return NULL; + + if (!var) + return NULL; + + for (tmp = var; tmp; tmp = tmp->next) { + /* If this is type=user, then skip this object. */ + if (!strcasecmp(tmp->name, "type") && + !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) { + ast_variables_destroy(var); + return NULL; + } else if (!peername && !strcasecmp(tmp->name, "name")) { + peername = tmp->value; + } + } + + if (!peername) { /* Did not find peer in realtime */ + ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr); + ast_variables_destroy(var); + return NULL; + } + + /* Peer found in realtime, now build it in memory */ + peer = build_peer(peername, var, NULL, 1); + + ast_variables_destroy(var); + + return peer; +} + +static int oh323_addrcmp_str(struct in_addr inaddr, char *addr) +{ + return strcmp(ast_inet_ntoa(inaddr), addr); +} + +static struct oh323_user *find_user(const call_details_t *cd, int realtime) +{ + struct oh323_user *u; + + if (userbyalias) + u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases); + else + u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str); + + if (!u && realtime) + u = realtime_user(cd); + + if (!u && h323debug) + ast_debug(1, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp); + + return u; +} + +static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin) +{ + int res; + + if (!sin) + res = -1; + else + res = inaddrcmp(&addr , sin); + + return res; +} + +static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime) +{ + struct oh323_peer *p; + + if (peer) + p = ASTOBJ_CONTAINER_FIND(&peerl, peer); + else + p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp); + + if (!p && realtime) + p = realtime_peer(peer, sin); + + if (!p && h323debug) + ast_debug(1, "Could not find peer by name %s or address %s\n", (peer ? peer : "<NONE>"), (sin ? ast_inet_ntoa(sin->sin_addr) : "<NONE>")); + + 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] = ""; + + ast_copy_string(peer, opeer, sizeof(peer)); + port = strchr(peer, ':'); + if (port) { + *port = '\0'; + port++; + } + pvt->sa.sin_family = AF_INET; + p = find_peer(peer, NULL, 1); + if (p) { + found++; + memcpy(&pvt->options, &p->options, sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + if (pvt->options.dtmfmode) { + if (pvt->options.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; + } + ASTOBJ_UNREF(p, oh323_destroy_peer); + } + 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); + /* Look peer by address */ + p = find_peer(NULL, &pvt->sa, 1); + memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + if (p) { + ASTOBJ_UNREF(p, oh323_destroy_peer); + } + if (pvt->options.dtmfmode) { + if (pvt->options.dtmfmode & H323_DTMF_RFC2833) { + pvt->nonCodecCapability |= AST_RTP_DTMF; + } else { + pvt->nonCodecCapability &= ~AST_RTP_DTMF; + } + } + return 0; + } else { + ast_log(LOG_WARNING, "No such host: %s\n", peer); + return -1; + } + } else if (!found) { + return -1; + } else { + return 0; + } +} +static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause) +{ + int oldformat; + struct oh323_pvt *pvt; + struct ast_channel *tmpc = NULL; + char *dest = (char *)data; + char *ext, *host; + char *h323id = NULL; + char tmp[256], tmp1[256]; + + if (h323debug) + ast_debug(1, "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_AUDIO_MASK; + if (!format) { + ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format); + oh323_destroy(pvt); + if (cause) + *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION; + return NULL; + } + ast_copy_string(tmp, dest, sizeof(tmp)); + host = strchr(tmp, '@'); + if (host) { + *host = '\0'; + host++; + ext = tmp; + } else { + ext = strrchr(tmp, '/'); + if (ext) + *ext++ = '\0'; + host = tmp; + } + strtok_r(host, "/", &(h323id)); + if (!ast_strlen_zero(h323id)) { + h323_set_id(h323id); + } + if (ext) { + ast_copy_string(pvt->exten, ext, sizeof(pvt->exten)); + } + if (h323debug) + ast_debug(1, "Extension: %s Host: %s\n", pvt->exten, host); + + if (gatekeeper_disable) { + if (create_addr(pvt, host)) { + oh323_destroy(pvt); + if (cause) + *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER; + return NULL; + } + } + else { + memcpy(&pvt->options, &global_options, sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + if (pvt->options.dtmfmode) { + if (pvt->options.dtmfmode & H323_DTMF_RFC2833) { + pvt->nonCodecCapability |= AST_RTP_DTMF; + } else { + pvt->nonCodecCapability &= ~AST_RTP_DTMF; + } + } + } + + ast_mutex_lock(&caplock); + /* Generate unique channel identifier */ + snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique); + tmp1[sizeof(tmp1)-1] = '\0'; + ast_mutex_unlock(&caplock); + + ast_mutex_lock(&pvt->lock); + tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1); + ast_mutex_unlock(&pvt->lock); + if (!tmpc) { + oh323_destroy(pvt); + if (cause) + *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE; + } + ast_update_use_count(); + restart_monitor(); + return tmpc; +} + +/*! \brief Find a call by alias */ +static struct oh323_alias *find_alias(const char *source_aliases, int realtime) +{ + struct oh323_alias *a; + + a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases); + + if (!a && realtime) + a = realtime_alias(source_aliases); + + return a; +} + +/*! \brief + * Callback for sending digits from H.323 up to asterisk + * + */ +static int receive_digit(unsigned call_reference, char digit, const char *token, int duration) +{ + struct oh323_pvt *pvt; + int res; + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token); + return -1; + } + if (h323debug) + ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token); + + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + if (digit == '!') + res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH); + else { + struct ast_frame f = { + .frametype = AST_FRAME_DTMF_END, + .subclass = digit, + .samples = duration * 8, + .len = duration, + .src = "SEND_DIGIT", + }; + if (digit == ' ') { /* signalUpdate message */ + f.subclass = pvt->curDTMF; + AST_SCHED_DEL(sched, pvt->DTMFsched); + } else { /* Regular input or signal message */ + if (pvt->DTMFsched >= 0) { + /* We still don't send DTMF END from previous event, send it now */ + AST_SCHED_DEL(sched, pvt->DTMFsched); + f.subclass = pvt->curDTMF; + f.samples = f.len = 0; + ast_queue_frame(pvt->owner, &f); + /* Restore values */ + f.subclass = digit; + f.samples = duration * 8; + f.len = duration; + } + if (duration) { /* This is a signal, signalUpdate follows */ + f.frametype = AST_FRAME_DTMF_BEGIN; + pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt); + if (h323debug) + ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched); + } + pvt->curDTMF = digit; + } + res = ast_queue_frame(pvt->owner, &f); + } + ast_channel_unlock(pvt->owner); + } else { + if (digit == '!') + pvt->newcontrol = AST_CONTROL_FLASH; + else { + pvt->newduration = duration; + pvt->newdigit = digit; + } + res = 0; + } + ast_mutex_unlock(&pvt->lock); + return res; +} + +/*! \brief + * Callback function used to inform the H.323 stack of the local rtp ip/port details + * + * \return Returns the local RTP information + */ +static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token) +{ + struct oh323_pvt *pvt; + struct sockaddr_in us; + struct rtp_info *info; + + info = ast_calloc(1, sizeof(*info)); + if (!info) { + ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n"); + return NULL; + } + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_free(info); + ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference); + return NULL; + } + if (!pvt->rtp) + __oh323_rtp_create(pvt); + if (!pvt->rtp) { + ast_mutex_unlock(&pvt->lock); + ast_free(info); + ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", 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); + ast_mutex_unlock(&pvt->lock); + + ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr)); + info->port = ntohs(us.sin_port); + if (h323debug) + ast_debug(1, "Sending RTP 'US' %s:%d\n", info->addr, info->port); + return info; +} + +/* + * Definition taken from rtp.c for rtpPayloadType because we need it here. + */ + +struct rtpPayloadType { + int isAstFormat; /* whether the following code is an AST_FORMAT */ + int code; +}; + +/*! \brief + * Call-back function passing remote ip/port information from H.323 to asterisk + * + * Returns nothing + */ +static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt) +{ + struct oh323_pvt *pvt; + struct sockaddr_in them; + struct rtpPayloadType rtptype; + int nativeformats_changed; + enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE; + + if (h323debug) + ast_debug(1, "Setting up RTP connection for %s\n", token); + + /* Find the call or allocate a private structure if call not found */ + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Something is wrong: rtp\n"); + return; + } + if (pvt->alreadygone) { + ast_mutex_unlock(&pvt->lock); + return; + } + + if (!pvt->rtp) + __oh323_rtp_create(pvt); + + if ((pt == 2) && (pvt->jointcapability & AST_FORMAT_G726_AAL2)) { + ast_rtp_set_rtpmap_type(pvt->rtp, pt, "audio", "G726-32", AST_RTP_OPT_G726_NONSTANDARD); + } + + them.sin_family = AF_INET; + /* only works for IPv4 */ + them.sin_addr.s_addr = inet_addr(remoteIp); + them.sin_port = htons(remotePort); + + if (them.sin_addr.s_addr) { + ast_rtp_set_peer(pvt->rtp, &them); + if (pvt->recvonly) { + pvt->recvonly = 0; + rtp_change = NEED_UNHOLD; + } + } else { + ast_rtp_stop(pvt->rtp); + if (!pvt->recvonly) { + pvt->recvonly = 1; + rtp_change = NEED_HOLD; + } + } + + /* Change native format to reflect information taken from OLC/OLCAck */ + nativeformats_changed = 0; + if (pt != 128 && pvt->rtp) { /* Payload type is invalid, so try to use previously decided */ + rtptype = ast_rtp_lookup_pt(pvt->rtp, pt); + if (h323debug) + ast_debug(1, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt); + if (pvt->nativeformats != rtptype.code) { + pvt->nativeformats = rtptype.code; + nativeformats_changed = 1; + } + } else if (h323debug) + ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n"); + + /* Don't try to lock the channel if nothing changed */ + if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) { + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + /* Re-build translation path only if native format(s) has been changed */ + if (pvt->owner->nativeformats != pvt->nativeformats) { + if (h323debug) + ast_debug(1, "Native format changed to %d from %d, read format is %d, write format is %d\n", pvt->nativeformats, pvt->owner->nativeformats, pvt->owner->readformat, pvt->owner->writeformat); + pvt->owner->nativeformats = pvt->nativeformats; + ast_set_read_format(pvt->owner, pvt->owner->readformat); + ast_set_write_format(pvt->owner, pvt->owner->writeformat); + } + if (pvt->options.progress_audio) + ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS); + switch (rtp_change) { + case NEED_HOLD: + ast_queue_control(pvt->owner, AST_CONTROL_HOLD); + break; + case NEED_UNHOLD: + ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD); + break; + default: + break; + } + ast_channel_unlock(pvt->owner); + } + else { + if (pvt->options.progress_audio) + pvt->newcontrol = AST_CONTROL_PROGRESS; + else if (rtp_change == NEED_HOLD) + pvt->newcontrol = AST_CONTROL_HOLD; + else if (rtp_change == NEED_UNHOLD) + pvt->newcontrol = AST_CONTROL_UNHOLD; + if (h323debug) + ast_debug(1, "RTP connection preparation for %s is pending...\n", token); + } + } + ast_mutex_unlock(&pvt->lock); + + if (h323debug) + ast_debug(1, "RTP connection prepared for %s\n", token); + + return; +} + +/*! \brief + * Call-back function to signal asterisk that the channel has been answered + * Returns nothing + */ +static void connection_made(unsigned call_reference, const char *token) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Call %s answered\n", token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Something is wrong: connection\n"); + return; + } + + /* Inform asterisk about remote party connected only on outgoing calls */ + if (!pvt->outgoing) { + ast_mutex_unlock(&pvt->lock); + return; + } + /* Do not send ANSWER message more than once */ + if (!pvt->connection_established) { + pvt->connection_established = 1; + update_state(pvt, -1, AST_CONTROL_ANSWER); + } + ast_mutex_unlock(&pvt->lock); + return; +} + +static int progress(unsigned call_reference, const char *token, int inband) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated")); + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Private structure not found in progress.\n"); + return -1; + } + if (!pvt->owner) { + ast_mutex_unlock(&pvt->lock); + ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n"); + return -1; + } + update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING)); + ast_mutex_unlock(&pvt->lock); + + return 0; +} + +/*! \brief + * Call-back function for incoming calls + * + * Returns 1 on success + */ +static call_options_t *setup_incoming_call(call_details_t *cd) +{ + struct oh323_pvt *pvt; + struct oh323_user *user = NULL; + struct oh323_alias *alias = NULL; + + if (h323debug) + ast_debug(1, "Setting up incoming call for %s\n", cd->call_token); + + /* allocate the call*/ + pvt = oh323_alloc(cd->call_reference); + + if (!pvt) { + ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n"); + cleanup_call_details(cd); + return NULL; + } + + /* Populate the call details in the private structure */ + memcpy(&pvt->cd, cd, sizeof(pvt->cd)); + memcpy(&pvt->options, &global_options, sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + + if (h323debug) { + ast_verb(3, "Setting up Call\n"); + ast_verb(3, " \tCall token: [%s]\n", pvt->cd.call_token); + ast_verb(3, " \tCalling party name: [%s]\n", pvt->cd.call_source_name); + ast_verb(3, " \tCalling party number: [%s]\n", pvt->cd.call_source_e164); + ast_verb(3, " \tCalled party name: [%s]\n", pvt->cd.call_dest_alias); + ast_verb(3, " \tCalled party number: [%s]\n", pvt->cd.call_dest_e164); + if (pvt->cd.redirect_reason >= 0) + ast_verb(3, " \tRedirecting party number: [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason); + ast_verb(3, " \tCalling party IP: [%s]\n", pvt->cd.sourceIp); + } + + /* Decide if we are allowing Gatekeeper routed calls*/ + if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) { + if (!ast_strlen_zero(cd->call_dest_e164)) { + ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten)); + ast_copy_string(pvt->context, default_context, sizeof(pvt->context)); + } else { + alias = find_alias(cd->call_dest_alias, 1); + if (!alias) { + ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias); + oh323_destroy(pvt); + return NULL; + } + ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten)); + ast_copy_string(pvt->context, alias->context, sizeof(pvt->context)); + } + } else { + /* Either this call is not from the Gatekeeper + or we are not allowing gk routed calls */ + user = find_user(cd, 1); + if (!user) { + if (!acceptAnonymous) { + ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp); + oh323_destroy(pvt); + return NULL; + } + if (ast_strlen_zero(default_context)) { + ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp); + oh323_destroy(pvt); + return NULL; + } + ast_copy_string(pvt->context, default_context, sizeof(pvt->context)); + if (!ast_strlen_zero(pvt->cd.call_dest_e164)) { + ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten)); + } else { + ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten)); + } + if (h323debug) + ast_debug(1, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten); + } else { + if (user->host) { + if (strcasecmp(cd->sourceIp, ast_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); + oh323_destroy(pvt); + ASTOBJ_UNREF(user, oh323_destroy_user); + return NULL; + } + ast_copy_string(pvt->context, default_context, sizeof(pvt->context)); + } else { + ast_copy_string(pvt->context, user->context, sizeof(pvt->context)); + } + 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); + oh323_destroy(pvt); + ASTOBJ_UNREF(user, oh323_destroy_user); + return NULL; /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */ + } + } + ast_copy_string(pvt->context, user->context, sizeof(pvt->context)); + memcpy(&pvt->options, &user->options, sizeof(pvt->options)); + pvt->jointcapability = pvt->options.capability; + if (!ast_strlen_zero(pvt->cd.call_dest_e164)) { + ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten)); + } else { + ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten)); + } + if (!ast_strlen_zero(user->accountcode)) { + ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode)); + } + if (user->amaflags) { + pvt->amaflags = user->amaflags; + } + ASTOBJ_UNREF(user, oh323_destroy_user); + } + } + return &pvt->options; +} + +/*! \brief + * 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; + struct ast_channel *c = NULL; + enum {ext_original, ext_s, ext_i, ext_notexists} try_exten; + char tmp_exten[sizeof(pvt->exten)]; + + if (h323debug) + ast_debug(1, "Preparing Asterisk to answer for %s\n", token); + + /* Find the call or allocate a private structure if call not found */ + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Something is wrong: answer_call\n"); + return 0; + } + /* Check if requested extension@context pair exists in the dialplan */ + ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten)); + + /* Try to find best extension in specified context */ + if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) { + if (tmp_exten[0] == 's') + try_exten = ext_s; + else if (tmp_exten[0] == 'i') + try_exten = ext_i; + else + try_exten = ext_original; + } else + try_exten = ext_original; + do { + if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL)) + break; + switch (try_exten) { + case ext_original: + tmp_exten[0] = 's'; + tmp_exten[1] = '\0'; + try_exten = ext_s; + break; + case ext_s: + tmp_exten[0] = 'i'; + try_exten = ext_i; + break; + case ext_i: + try_exten = ext_notexists; + break; + default: + break; + } + } while (try_exten != ext_notexists); + + /* Drop the call if we don't have <exten>, s and i extensions */ + if (try_exten == ext_notexists) { + ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context); + ast_mutex_unlock(&pvt->lock); + h323_clear_call(token, AST_CAUSE_UNALLOCATED); + return 0; + } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) { + if (h323debug) + ast_debug(1, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context); + ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten)); + } + + /* allocate a channel and tell asterisk about it */ + c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token); + + /* And release when done */ + ast_mutex_unlock(&pvt->lock); + if (!c) { + ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n"); + return 0; + } + return 1; +} + +/*! \brief + * Call-back function to establish an outgoing H.323 call + * + * Returns 1 on success + */ +static int setup_outgoing_call(call_details_t *cd) +{ + /* Use argument here or free it immediately */ + cleanup_call_details(cd); + + return 1; +} + +/*! \brief + * Call-back function to signal asterisk that the channel is ringing + * Returns nothing + */ +static void chan_ringing(unsigned call_reference, const char *token) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Ringing on %s\n", token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + ast_log(LOG_ERROR, "Something is wrong: ringing\n"); + return; + } + if (!pvt->owner) { + ast_mutex_unlock(&pvt->lock); + ast_log(LOG_ERROR, "Channel has no owner\n"); + return; + } + update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING); + ast_mutex_unlock(&pvt->lock); + return; +} + +/*! \brief + * Call-back function to cleanup communication + * Returns nothing, + */ +static void cleanup_connection(unsigned call_reference, const char *call_token) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Cleaning connection to %s\n", call_token); + + while (1) { + pvt = find_call_locked(call_reference, call_token); + if (!pvt) { + if (h323debug) + ast_debug(1, "No connection for %s\n", call_token); + return; + } + if (!pvt->owner || !ast_channel_trylock(pvt->owner)) + break; +#if 1 + ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token); +#ifdef DEBUG_THREADS + /* XXX to be completed + * If we want to print more info on who is holding the lock, + * implement the relevant code in lock.h and use the routines + * supplied there. + */ +#endif +#endif + ast_mutex_unlock(&pvt->lock); + usleep(1); + } + if (pvt->rtp) { + /* Immediately stop RTP */ + ast_rtp_destroy(pvt->rtp); + pvt->rtp = NULL; + } + /* Free dsp used for in-band DTMF detection */ + if (pvt->vad) { + ast_dsp_free(pvt->vad); + pvt->vad = NULL; + } + cleanup_call_details(&pvt->cd); + pvt->alreadygone = 1; + /* Send hangup */ + if (pvt->owner) { + pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV; + ast_queue_hangup(pvt->owner); + ast_channel_unlock(pvt->owner); + } + ast_mutex_unlock(&pvt->lock); + if (h323debug) + ast_debug(1, "Connection to %s cleaned\n", call_token); + return; +} + +static void hangup_connection(unsigned int call_reference, const char *token, int cause) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Hanging up connection to %s with cause %d\n", token, cause); + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + if (h323debug) + ast_debug(1, "Connection to %s already cleared\n", token); + return; + } + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV; + pvt->owner->hangupcause = pvt->hangupcause = cause; + ast_queue_hangup(pvt->owner); + ast_channel_unlock(pvt->owner); + } + else { + pvt->needhangup = 1; + pvt->hangupcause = cause; + if (h323debug) + ast_debug(1, "Hangup for %s is pending\n", token); + } + ast_mutex_unlock(&pvt->lock); +} + +static void set_dtmf_payload(unsigned call_reference, const char *token, int payload, int is_cisco) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Setting %s DTMF payload to %d on %s\n", (is_cisco ? "Cisco" : "RFC2833"), payload, token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) { + return; + } + if (pvt->rtp) { + ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", (is_cisco ? "cisco-telephone-event" : "telephone-event"), 0); + } + pvt->dtmf_pt[is_cisco ? 1 : 0] = payload; + ast_mutex_unlock(&pvt->lock); + if (h323debug) + ast_debug(1, "DTMF payload on %s set to %d\n", token, payload); +} + +static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Got remote capabilities from connection %s\n", token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) + return; + pvt->peercapability = capabilities; + pvt->jointcapability = pvt->options.capability & capabilities; + if (prefs) { + memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs)); + if (h323debug) { + int i; + for (i = 0; i < 32; ++i) { + if (!prefs->order[i]) + break; + ast_debug(1, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]); + } + } + if (pvt->rtp) + ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs); + } + ast_mutex_unlock(&pvt->lock); +} + +static void set_local_capabilities(unsigned call_reference, const char *token) +{ + struct oh323_pvt *pvt; + int capability, dtmfmode, pref_codec; + struct ast_codec_pref prefs; + + if (h323debug) + ast_debug(1, "Setting capabilities for connection %s\n", token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) + return; + capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability; + dtmfmode = pvt->options.dtmfmode; + prefs = pvt->options.prefs; + pref_codec = pvt->pref_codec; + ast_mutex_unlock(&pvt->lock); + h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec); + + if (h323debug) + ast_debug(1, "Capabilities for connection %s is set\n", token); +} + +static void remote_hold(unsigned call_reference, const char *token, int is_hold) +{ + struct oh323_pvt *pvt; + + if (h323debug) + ast_debug(1, "Setting %shold status for connection %s\n", (is_hold ? "" : "un"), token); + + pvt = find_call_locked(call_reference, token); + if (!pvt) + return; + if (pvt->owner && !ast_channel_trylock(pvt->owner)) { + if (is_hold) + ast_queue_control(pvt->owner, AST_CONTROL_HOLD); + else + ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD); + ast_channel_unlock(pvt->owner); + } + else { + if (is_hold) + pvt->newcontrol = AST_CONTROL_HOLD; + else + pvt->newcontrol = AST_CONTROL_UNHOLD; + } + ast_mutex_unlock(&pvt->lock); +} + +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) { + ast_verb(1, "Reloading H.323\n"); + h323_do_reload(); + } + /* Check for interfaces needing to be killed */ + if (!ast_mutex_trylock(&iflock)) { +#if 1 + do { + for (oh323 = iflist; oh323; oh323 = oh323->next) { + if (!ast_mutex_trylock(&oh323->lock)) { + if (oh323->needdestroy) { + __oh323_destroy(oh323); + break; + } + ast_mutex_unlock(&oh323->lock); + } + } + } while (/*oh323*/ 0); +#else +restartsearch: + oh323 = iflist; + while(oh323) { + if (!ast_mutex_trylock(&oh323->lock)) { + if (oh323->needdestroy) { + __oh323_destroy(oh323); + goto restartsearch; + } + ast_mutex_unlock(&oh323->lock); + oh323 = oh323->next; + } + } +#endif + ast_mutex_unlock(&iflock); + } else + oh323 = (struct oh323_pvt *)1; /* Force fast loop */ + pthread_testcancel(); + /* Wait for sched or io */ + res = ast_sched_wait(sched); + if ((res < 0) || (res > 1000)) { + res = 1000; + } + /* Do not wait if some channel(s) is destroyed, probably, more available too */ + if (oh323) + res = 1; + 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 (ast_mutex_lock(&monlock)) { + ast_log(LOG_WARNING, "Unable to lock monitor\n"); + return -1; + } + if (monitor_thread == AST_PTHREADT_STOP) { + ast_mutex_unlock(&monlock); + return 0; + } + 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 (ast_pthread_create_detached_background(&monitor_thread, NULL, do_monitor, NULL) < 0) { + monitor_thread = AST_PTHREADT_NULL; + ast_mutex_unlock(&monlock); + ast_log(LOG_ERROR, "Unable to start monitor thread.\n"); + return -1; + } + } + ast_mutex_unlock(&monlock); + return 0; +} + +static char *handle_cli_h323_set_trace(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 set trace [off]"; + e->usage = + "Usage: h323 set trace (off|<trace level>)\n" + " Enable/Disable H.323 stack tracing for debugging purposes\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc != 4) + return CLI_SHOWUSAGE; + if (!strcasecmp(a->argv[3], "off")) { + h323_debug(0, 0); + ast_cli(a->fd, "H.323 Trace Disabled\n"); + } else { + int tracelevel = atoi(a->argv[3]); + h323_debug(1, tracelevel); + ast_cli(a->fd, "H.323 Trace Enabled (Trace Level: %d)\n", tracelevel); + } + return CLI_SUCCESS; +} + +static char *handle_cli_h323_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 set debug [off]"; + e->usage = + "Usage: h323 set debug [off]\n" + " Enable/Disable H.323 debugging output\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc < 3 || a->argc > 4) + return CLI_SHOWUSAGE; + if (a->argc == 4 && strcasecmp(a->argv[3], "off")) + return CLI_SHOWUSAGE; + + h323debug = (a->argc == 3) ? 1 : 0; + ast_cli(a->fd, "H.323 Debugging %s\n", h323debug ? "Enabled" : "Disabled"); + return CLI_SUCCESS; +} + +static char *handle_cli_h323_cycle_gk(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 cycle gk"; + e->usage = + "Usage: h323 cycle gk\n" + " Manually re-register with the Gatekeper (Currently Disabled)\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc != 3) + return CLI_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 CLI_SUCCESS; +} + +static char *handle_cli_h323_hangup(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 hangup"; + e->usage = + "Usage: h323 hangup <token>\n" + " Manually try to hang up the call identified by <token>\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc != 3) + return CLI_SHOWUSAGE; + if (h323_soft_hangup(a->argv[2])) { + ast_verb(3, "Hangup succeeded on %s\n", a->argv[2]); + } else { + ast_verb(3, "Hangup failed for %s\n", a->argv[2]); + } + return CLI_SUCCESS; +} + +static char *handle_cli_h323_show_tokens(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 show tokens"; + e->usage = + "Usage: h323 show tokens\n" + " Print out all active call tokens\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc != 3) + return CLI_SHOWUSAGE; + + h323_show_tokens(); + + return CLI_SUCCESS; +} + +static struct ast_cli_entry cli_h323[] = { + AST_CLI_DEFINE(handle_cli_h323_set_trace, "Enable/Disable H.323 Stack Tracing"), + AST_CLI_DEFINE(handle_cli_h323_set_debug, "Enable/Disable H.323 Debugging"), + AST_CLI_DEFINE(handle_cli_h323_cycle_gk, "Manually re-register with the Gatekeper"), + AST_CLI_DEFINE(handle_cli_h323_hangup, "Manually try to hang up a call"), + AST_CLI_DEFINE(handle_cli_h323_show_tokens, "Show all active call tokens"), +}; + +static void delete_users(void) +{ + int pruned = 0; + + /* Delete all users */ + ASTOBJ_CONTAINER_WRLOCK(&userl); + ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do { + ASTOBJ_RDLOCK(iterator); + ASTOBJ_MARK(iterator); + ++pruned; + ASTOBJ_UNLOCK(iterator); + } while (0) ); + if (pruned) { + ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user); + } + ASTOBJ_CONTAINER_UNLOCK(&userl); + + ASTOBJ_CONTAINER_WRLOCK(&peerl); + ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do { + ASTOBJ_RDLOCK(iterator); + ASTOBJ_MARK(iterator); + ASTOBJ_UNLOCK(iterator); + } while (0) ); + ASTOBJ_CONTAINER_UNLOCK(&peerl); +} + +static void delete_aliases(void) +{ + int pruned = 0; + + /* Delete all aliases */ + ASTOBJ_CONTAINER_WRLOCK(&aliasl); + ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do { + ASTOBJ_RDLOCK(iterator); + ASTOBJ_MARK(iterator); + ++pruned; + ASTOBJ_UNLOCK(iterator); + } while (0) ); + if (pruned) { + ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias); + } + ASTOBJ_CONTAINER_UNLOCK(&aliasl); +} + +static void prune_peers(void) +{ + /* Prune peers who still are supposed to be deleted */ + ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer); +} + +static int reload_config(int is_reload) +{ + struct ast_config *cfg, *ucfg; + 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; + const char *utype; + int is_user, is_peer, is_alias; + char _gatekeeper[100]; + int gk_discover, gk_disable, gk_changed; + struct ast_flags config_flags = { is_reload ? CONFIG_FLAG_FILEUNCHANGED : 0 }; + + cfg = ast_config_load(config, config_flags); + + /* 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; + } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) { + ucfg = ast_config_load("users.conf", config_flags); + if (ucfg == CONFIG_STATUS_FILEUNCHANGED) + return 0; + ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED); + cfg = ast_config_load(config, config_flags); + } else { + ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED); + ucfg = ast_config_load("users.conf", config_flags); + } + + if (is_reload) { + delete_users(); + delete_aliases(); + prune_peers(); + } + + /* fire up the H.323 Endpoint */ + if (!h323_end_point_exist()) { + h323_end_point_create(); + } + ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper)); + gk_discover = gatekeeper_discover; + gk_disable = gatekeeper_disable; + memset(&bindaddr, 0, sizeof(bindaddr)); + memset(&global_options, 0, sizeof(global_options)); + global_options.fastStart = 1; + global_options.h245Tunneling = 1; + global_options.dtmfcodec[0] = H323_DTMF_RFC2833_PT; + global_options.dtmfcodec[1] = H323_DTMF_CISCO_PT; + global_options.dtmfmode = 0; + global_options.holdHandling = 0; + global_options.capability = GLOBAL_CAPABILITY; + global_options.bridge = 1; /* Do native bridging by default */ + strcpy(default_context, "default"); + h323_signalling_port = 1720; + gatekeeper_disable = 1; + gatekeeper_discover = 0; + gkroute = 0; + userbyalias = 1; + acceptAnonymous = 1; + tos = 0; + cos = 0; + + /* Copy the default jb config over global_jbconf */ + memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf)); + + if (ucfg) { + struct ast_variable *gen; + int genhas_h323; + const char *has_h323; + + genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323")); + gen = ast_variable_browse(ucfg, "general"); + for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) { + if (strcasecmp(cat, "general")) { + has_h323 = ast_variable_retrieve(ucfg, cat, "hash323"); + if (ast_true(has_h323) || (!has_h323 && genhas_h323)) { + user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0); + if (user) { + ASTOBJ_CONTAINER_LINK(&userl, user); + ASTOBJ_UNREF(user, oh323_destroy_user); + } + peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0); + if (peer) { + ASTOBJ_CONTAINER_LINK(&peerl, peer); + ASTOBJ_UNREF(peer, oh323_destroy_peer); + } + } + } + } + ast_config_destroy(ucfg); + } + + for (v = ast_variable_browse(cfg, "general"); v; v = v->next) { + /* handle jb conf */ + if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) + continue; + /* 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, "tos")) { /* Needs to be removed in next release */ + ast_log(LOG_WARNING, "The \"tos\" setting is deprecated in this version of Asterisk. Please change to \"tos_audio\".\n"); + if (ast_str2tos(v->value, &tos)) { + ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno); + } + } else if (!strcasecmp(v->name, "tos_audio")) { + if (ast_str2tos(v->value, &tos)) { + ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno); + } + } else if (!strcasecmp(v->name, "cos")) { + ast_log(LOG_WARNING, "The \"cos\" setting is deprecated in this version of Asterisk. Please change to \"cos_audio\".\n"); + if (ast_str2cos(v->value, &cos)) { + ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno); + } + } else if (!strcasecmp(v->name, "cos_audio")) { + if (ast_str2cos(v->value, &cos)) { + ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno); + } + } else if (!strcasecmp(v->name, "gatekeeper")) { + if (!strcasecmp(v->value, "DISABLE")) { + gatekeeper_disable = 1; + } else if (!strcasecmp(v->value, "DISCOVER")) { + gatekeeper_disable = 0; + gatekeeper_discover = 1; + } else { + gatekeeper_disable = 0; + ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper)); + } + } else if (!strcasecmp(v->name, "secret")) { + ast_copy_string(secret, v->value, sizeof(secret)); + } else if (!strcasecmp(v->name, "AllowGKRouted")) { + gkroute = ast_true(v->value); + } else if (!strcasecmp(v->name, "context")) { + ast_copy_string(default_context, v->value, sizeof(default_context)); + ast_verb(2, "Setting default context to %s\n", default_context); + } else if (!strcasecmp(v->name, "UserByAlias")) { + userbyalias = ast_true(v->value); + } else if (!strcasecmp(v->name, "AcceptAnonymous")) { + acceptAnonymous = ast_true(v->value); + } else if (!update_common_options(v, &global_options)) { + /* dummy */ + } + } + if (!global_options.dtmfmode) + global_options.dtmfmode = H323_DTMF_RFC2833; + if (global_options.holdHandling == ~0) + global_options.holdHandling = 0; + else if (!global_options.holdHandling) + global_options.holdHandling = H323_HOLD_H450; + + for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) { + if (strcasecmp(cat, "general")) { + utype = ast_variable_retrieve(cfg, cat, "type"); + if (utype) { + is_user = is_peer = is_alias = 0; + if (!strcasecmp(utype, "user")) + is_user = 1; + else if (!strcasecmp(utype, "peer")) + is_peer = 1; + else if (!strcasecmp(utype, "friend")) + is_user = is_peer = 1; + else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias")) + is_alias = 1; + else { + ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config); + continue; + } + if (is_user) { + user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0); + if (user) { + ASTOBJ_CONTAINER_LINK(&userl, user); + ASTOBJ_UNREF(user, oh323_destroy_user); + } + } + if (is_peer) { + peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0); + if (peer) { + ASTOBJ_CONTAINER_LINK(&peerl, peer); + ASTOBJ_UNREF(peer, oh323_destroy_peer); + } + } + if (is_alias) { + alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0); + if (alias) { + ASTOBJ_CONTAINER_LINK(&aliasl, alias); + ASTOBJ_UNREF(alias, oh323_destroy_alias); + } + } + } else { + ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat); + } + } + } + ast_config_destroy(cfg); + + /* Register our H.323 aliases if any*/ + ASTOBJ_CONTAINER_WRLOCK(&aliasl); + ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do { + ASTOBJ_RDLOCK(iterator); + if (h323_set_alias(iterator)) { + ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name); + ASTOBJ_UNLOCK(iterator); + continue; + } + ASTOBJ_UNLOCK(iterator); + } while (0) ); + ASTOBJ_CONTAINER_UNLOCK(&aliasl); + + /* Don't touch GK if nothing changed because URQ will drop all existing calls */ + gk_changed = 0; + if (gatekeeper_disable != gk_disable) + gk_changed = is_reload; + else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover)) + gk_changed = is_reload; + else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0)) + gk_changed = is_reload; + if (gk_changed) { + if(!gk_disable) + h323_gk_urq(); + if (!gatekeeper_disable) { + if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) { + ast_log(LOG_ERROR, "Gatekeeper registration failed.\n"); + gatekeeper_disable = 1; + } + } + } + return 0; +} + +static int h323_reload(void) +{ + 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 char *handle_cli_h323_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a) +{ + switch (cmd) { + case CLI_INIT: + e->command = "h323 reload"; + e->usage = + "Usage: h323 reload\n" + " Reloads H.323 configuration from h323.conf\n"; + return NULL; + case CLI_GENERATE: + return NULL; + } + + if (a->argc != 2) + return CLI_SHOWUSAGE; + + h323_reload(); + + return CLI_SUCCESS; +} + +static int h323_do_reload(void) +{ + reload_config(1); + return 0; +} + +static int reload(void) +{ + if (!sched || !io) { + ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n"); + return 0; + } + return h323_reload(); +} + +static struct ast_cli_entry cli_h323_reload = + AST_CLI_DEFINE(handle_cli_h323_reload, "Reload H.323 configuration"); + +static enum ast_rtp_get_result oh323_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp) +{ + struct oh323_pvt *pvt; + enum ast_rtp_get_result res = AST_RTP_GET_FAILED; + + if (!(pvt = (struct oh323_pvt *)chan->tech_pvt)) + return res; + + ast_mutex_lock(&pvt->lock); + if (pvt->rtp && pvt->options.bridge) { + *rtp = pvt->rtp; + res = AST_RTP_TRY_NATIVE; + } + ast_mutex_unlock(&pvt->lock); + + return res; +} + +static enum ast_rtp_get_result oh323_get_vrtp_peer(struct ast_channel *chan, struct ast_rtp **rtp) +{ + return AST_RTP_GET_FAILED; +} + +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_G722: + return "G.722"; + 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, struct ast_rtp *trtp, int codecs, int nat_active) +{ + /* XXX Deal with Video */ + struct oh323_pvt *pvt; + struct sockaddr_in them; + struct sockaddr_in us; + char *mode; + + if (!rtp) { + return 0; + } + + mode = convertcap(chan->writeformat); + pvt = (struct oh323_pvt *) chan->tech_pvt; + if (!pvt) { + 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); +#if 0 /* Native bridge still isn't ready */ + h323_native_bridge(pvt->cd.call_token, ast_inet_ntoa(them.sin_addr), mode); +#endif + return 0; +} + +static struct ast_rtp_protocol oh323_rtp = { + .type = "H323", + .get_rtp_info = oh323_get_rtp_peer, + .get_vrtp_info = oh323_get_vrtp_peer, + .set_rtp_peer = oh323_set_rtp_peer, +}; + +static enum ast_module_load_result load_module(void) +{ + int res; + + h323debug = 0; + sched = sched_context_create(); + if (!sched) { + ast_log(LOG_WARNING, "Unable to create schedule context\n"); + return AST_MODULE_LOAD_FAILURE; + } + io = io_context_create(); + if (!io) { + ast_log(LOG_WARNING, "Unable to create I/O context\n"); + return AST_MODULE_LOAD_FAILURE; + } + ast_cli_register(&cli_h323_reload); + ASTOBJ_CONTAINER_INIT(&userl); + ASTOBJ_CONTAINER_INIT(&peerl); + ASTOBJ_CONTAINER_INIT(&aliasl); + res = reload_config(0); + if (res) { + /* No config entry */ + ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n"); + ast_cli_unregister(&cli_h323_reload); + io_context_destroy(io); + io = NULL; + sched_context_destroy(sched); + sched = NULL; + ASTOBJ_CONTAINER_DESTROY(&userl); + ASTOBJ_CONTAINER_DESTROY(&peerl); + ASTOBJ_CONTAINER_DESTROY(&aliasl); + return AST_MODULE_LOAD_DECLINE; + } else { + /* Make sure we can register our channel type */ + if (ast_channel_register(&oh323_tech)) { + ast_log(LOG_ERROR, "Unable to register channel class 'H323'\n"); + ast_cli_unregister(&cli_h323_reload); + h323_end_process(); + io_context_destroy(io); + sched_context_destroy(sched); + + ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user); + ASTOBJ_CONTAINER_DESTROY(&userl); + ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer); + ASTOBJ_CONTAINER_DESTROY(&peerl); + ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias); + ASTOBJ_CONTAINER_DESTROY(&aliasl); + + return AST_MODULE_LOAD_FAILURE; + } + ast_cli_register_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry)); + + 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, + receive_digit, + answer_call, + progress, + set_dtmf_payload, + hangup_connection, + set_local_capabilities, + set_peer_capabilities, + remote_hold); + /* start the h.323 listener */ + if (h323_start_listener(h323_signalling_port, bindaddr)) { + ast_log(LOG_ERROR, "Unable to create H323 listener.\n"); + ast_rtp_proto_unregister(&oh323_rtp); + ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry)); + ast_cli_unregister(&cli_h323_reload); + h323_end_process(); + io_context_destroy(io); + sched_context_destroy(sched); + + ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user); + ASTOBJ_CONTAINER_DESTROY(&userl); + ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer); + ASTOBJ_CONTAINER_DESTROY(&peerl); + ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias); + ASTOBJ_CONTAINER_DESTROY(&aliasl); + + return AST_MODULE_LOAD_FAILURE; + } + /* Possibly register with a GK */ + if (!gatekeeper_disable) { + if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) { + ast_log(LOG_ERROR, "Gatekeeper registration failed.\n"); + gatekeeper_disable = 1; + res = AST_MODULE_LOAD_SUCCESS; + } + } + /* And start the monitor for the first time */ + restart_monitor(); + } + return res; +} + +static int unload_module(void) +{ + struct oh323_pvt *p, *pl; + + /* unregister commands */ + ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry)); + ast_cli_unregister(&cli_h323_reload); + + ast_channel_unregister(&oh323_tech); + ast_rtp_proto_unregister(&oh323_rtp); + + 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 != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) { + /* this causes a seg, anyone know why? */ + if (monitor_thread != pthread_self()) + 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); + ast_free(pl); + } + iflist = NULL; + ast_mutex_unlock(&iflock); + } else { + ast_log(LOG_WARNING, "Unable to lock the interface list\n"); + return -1; + } + if (!gatekeeper_disable) + h323_gk_urq(); + h323_end_process(); + if (io) + io_context_destroy(io); + if (sched) + sched_context_destroy(sched); + + ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user); + ASTOBJ_CONTAINER_DESTROY(&userl); + ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer); + ASTOBJ_CONTAINER_DESTROY(&peerl); + ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias); + ASTOBJ_CONTAINER_DESTROY(&aliasl); + + return 0; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "The NuFone Network's OpenH323 Channel Driver", + .load = load_module, + .unload = unload_module, + .reload = reload, +); |