Tue Apr 6 15:45:28 2010

Asterisk developer's documentation


chan_h323.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005
00005  *
00006  * OpenH323 Channel Driver for ASTERISK PBX.
00007  *       By Jeremy McNamara
00008  *                      For The NuFone Network
00009  *
00010  * chan_h323 has been derived from code created by
00011  *               Michael Manousos and Mark Spencer
00012  *
00013  * See http://www.asterisk.org for more information about
00014  * the Asterisk project. Please do not directly contact
00015  * any of the maintainers of this project for assistance;
00016  * the project provides a web site, mailing lists and IRC
00017  * channels for your use.
00018  *
00019  * This program is free software, distributed under the terms of
00020  * the GNU General Public License Version 2. See the LICENSE file
00021  * at the top of the source tree.
00022  */
00023 
00024 /*! \file
00025  *
00026  * \brief This file is part of the chan_h323 driver for Asterisk
00027  *
00028  * \author Jeremy McNamara
00029  *
00030  * \par See also
00031  * \arg Config_h323
00032  *
00033  * \ingroup channel_drivers
00034  */
00035 
00036 /*** MODULEINFO
00037    <depend>openh323</depend>
00038    <defaultenabled>yes</defaultenabled>
00039  ***/
00040 
00041 #ifdef __cplusplus
00042 extern "C" {
00043 #endif
00044 
00045 #include "asterisk.h"
00046 
00047 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 211528 $")
00048 
00049 #ifdef __cplusplus
00050 }
00051 #endif
00052 
00053 #include <sys/types.h>
00054 #include <sys/socket.h>
00055 #include <sys/signal.h>
00056 #include <sys/param.h>
00057 #if defined(BSD) || defined(SOLARIS)
00058 #ifndef IPTOS_MINCOST
00059 #define IPTOS_MINCOST 0x02
00060 #endif
00061 #endif
00062 #include <arpa/inet.h>
00063 #include <net/if.h>
00064 #include <netinet/in.h>
00065 #include <netinet/in_systm.h>
00066 #include <netinet/ip.h>
00067 #include <unistd.h>
00068 #include <stdlib.h>
00069 #include <netdb.h>
00070 #include <stdio.h>
00071 #include <string.h>
00072 #include <errno.h>
00073 #include <fcntl.h>
00074 
00075 #ifdef __cplusplus
00076 extern "C" {
00077 #endif
00078 
00079 #include "asterisk/lock.h"
00080 #include "asterisk/logger.h"
00081 #include "asterisk/channel.h"
00082 #include "asterisk/config.h"
00083 #include "asterisk/module.h"
00084 #include "asterisk/musiconhold.h"
00085 #include "asterisk/pbx.h"
00086 #include "asterisk/options.h"
00087 #include "asterisk/utils.h"
00088 #include "asterisk/lock.h"
00089 #include "asterisk/sched.h"
00090 #include "asterisk/io.h"
00091 #include "asterisk/rtp.h"
00092 #include "asterisk/acl.h"
00093 #include "asterisk/callerid.h"
00094 #include "asterisk/cli.h"
00095 #include "asterisk/dsp.h"
00096 #include "asterisk/causes.h"
00097 #include "asterisk/stringfields.h"
00098 #include "asterisk/abstract_jb.h"
00099 #include "asterisk/astobj.h"
00100 
00101 #ifdef __cplusplus
00102 }
00103 #endif
00104 
00105 #undef open
00106 #undef close
00107 #include "h323/chan_h323.h"
00108 
00109 receive_digit_cb on_receive_digit;
00110 on_rtp_cb on_external_rtp_create;
00111 start_rtp_cb on_start_rtp_channel;
00112 setup_incoming_cb on_incoming_call;
00113 setup_outbound_cb on_outgoing_call;
00114 chan_ringing_cb   on_chan_ringing;
00115 con_established_cb on_connection_established;
00116 clear_con_cb on_connection_cleared;
00117 answer_call_cb on_answer_call;
00118 progress_cb on_progress;
00119 rfc2833_cb on_set_rfc2833_payload;
00120 hangup_cb on_hangup;
00121 setcapabilities_cb on_setcapabilities;
00122 setpeercapabilities_cb on_setpeercapabilities;
00123 
00124 /* global debug flag */
00125 int h323debug;
00126 
00127 /*! Global jitterbuffer configuration - by default, jb is disabled */
00128 static struct ast_jb_conf default_jbconf =
00129 {
00130    .flags = 0,
00131    .max_size = -1,
00132    .resync_threshold = -1,
00133    .impl = ""
00134 };
00135 static struct ast_jb_conf global_jbconf;
00136 
00137 /** Variables required by Asterisk */
00138 static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver";
00139 static const char config[] = "h323.conf";
00140 static char default_context[AST_MAX_CONTEXT] = "default";
00141 static struct sockaddr_in bindaddr;
00142 
00143 #define GLOBAL_CAPABILITY (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_H261)
00144 
00145 /** H.323 configuration values */
00146 static int h323_signalling_port = 1720;
00147 static char gatekeeper[100];
00148 static int gatekeeper_disable = 1;
00149 static int gatekeeper_discover = 0;
00150 static int gkroute = 0;
00151 /* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
00152 static int userbyalias = 1;
00153 static int acceptAnonymous = 1;
00154 static int tos = 0;
00155 static char secret[50];
00156 static unsigned int unique = 0;
00157 
00158 static call_options_t global_options;
00159 
00160 /** Private structure of a OpenH323 channel */
00161 struct oh323_pvt {
00162    ast_mutex_t lock;             /* Channel private lock */
00163    call_options_t options;          /* Options to be used during call setup */
00164    int alreadygone;              /* Whether or not we've already been destroyed by our peer */
00165    int needdestroy;              /* if we need to be destroyed */
00166    call_details_t cd;               /* Call details */
00167    struct ast_channel *owner;       /* Who owns us */
00168    struct sockaddr_in sa;           /* Our peer */
00169    struct sockaddr_in redirip;         /* Where our RTP should be going if not to us */
00170    int nonCodecCapability;          /* non-audio capability */
00171    int outgoing;                 /* Outgoing or incoming call? */
00172    char exten[AST_MAX_EXTENSION];      /* Requested extension */
00173    char context[AST_MAX_CONTEXT];      /* Context where to start */
00174    char accountcode[256];           /* Account code */
00175    char rdnis[80];                  /* Referring DNIS, if available */
00176    int amaflags;                 /* AMA Flags */
00177    struct ast_rtp *rtp;          /* RTP Session */
00178    struct ast_dsp *vad;          /* Used for in-band DTMF detection */
00179    int nativeformats;               /* Codec formats supported by a channel */
00180    int needhangup;                  /* Send hangup when Asterisk is ready */
00181    int hangupcause;              /* Hangup cause from OpenH323 layer */
00182    int newstate;                 /* Pending state change */
00183    int newcontrol;                  /* Pending control to send */
00184    int newdigit;                 /* Pending DTMF digit to send */
00185    int newduration;              /* Pending DTMF digit duration to send */
00186    int pref_codec;                  /* Preferred codec */
00187    int peercapability;              /* Capabilities learned from peer */
00188    int jointcapability;          /* Common capabilities for local and remote side */
00189    struct ast_codec_pref peer_prefs;   /* Preferenced list of codecs which remote side supports */
00190    int dtmf_pt;                  /* Payload code used for RFC2833 messages */
00191    int curDTMF;                  /* DTMF tone being generated to Asterisk side */
00192    int DTMFsched;                /* Scheduler descriptor for DTMF */
00193    int update_rtp_info;          /* Configuration of fd's array is pending */
00194    int recvonly;                 /* Peer isn't wish to receive our voice stream */
00195    int txDtmfDigit;              /* DTMF digit being to send to H.323 side */
00196    int noInbandDtmf;             /* Inband DTMF processing by DSP isn't available */
00197    int connection_established;         /* Call got CONNECT message */
00198    int got_progress;             /* Call got PROGRESS message, pass inband audio */
00199    struct oh323_pvt *next;          /* Next channel in list */
00200 } *iflist = NULL;
00201 
00202 static struct ast_user_list {
00203    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user);
00204 } userl;
00205 
00206 static struct ast_peer_list {
00207    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer);
00208 } peerl;
00209 
00210 static struct ast_alias_list {
00211    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias);
00212 } aliasl;
00213 
00214 /** Asterisk RTP stuff */
00215 static struct sched_context *sched;
00216 static struct io_context *io;
00217 
00218 /** Protect the interface list (oh323_pvt) */
00219 AST_MUTEX_DEFINE_STATIC(iflock);
00220 
00221 /* Protect the monitoring thread, so only one process can kill or start it, and not
00222    when it's doing something critical. */
00223 AST_MUTEX_DEFINE_STATIC(monlock);
00224 
00225 /* Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
00226 AST_MUTEX_DEFINE_STATIC(caplock);
00227 
00228 /* Protect the reload process */
00229 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
00230 static int h323_reloading = 0;
00231 
00232 /* This is the thread for the monitor which checks for input on the channels
00233    which are not currently in use. */
00234 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00235 static int restart_monitor(void);
00236 static int h323_do_reload(void);
00237 
00238 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause);
00239 static int oh323_digit_begin(struct ast_channel *c, char digit);
00240 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration);
00241 static int oh323_call(struct ast_channel *c, char *dest, int timeout);
00242 static int oh323_hangup(struct ast_channel *c);
00243 static int oh323_answer(struct ast_channel *c);
00244 static struct ast_frame *oh323_read(struct ast_channel *c);
00245 static int oh323_write(struct ast_channel *c, struct ast_frame *frame);
00246 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen);
00247 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00248 
00249 static const struct ast_channel_tech oh323_tech = {
00250    .type = "H323",
00251    .description = tdesc,
00252    .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
00253    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
00254    .requester = oh323_request,
00255    .send_digit_begin = oh323_digit_begin,
00256    .send_digit_end = oh323_digit_end,
00257    .call = oh323_call,
00258    .hangup = oh323_hangup,
00259    .answer = oh323_answer,
00260    .read = oh323_read,
00261    .write = oh323_write,
00262    .indicate = oh323_indicate,
00263    .fixup = oh323_fixup,
00264    /* disable, for now */
00265 #if 0
00266    .bridge = ast_rtp_bridge,
00267 #endif
00268 };
00269 
00270 static const char* redirectingreason2str(int redirectingreason)
00271 {
00272    switch (redirectingreason) {
00273    case 0:
00274       return "UNKNOWN";
00275    case 1:
00276       return "BUSY";
00277    case 2:
00278       return "NO_REPLY";
00279    case 0xF:
00280       return "UNCONDITIONAL";
00281    default:
00282       return "NOREDIRECT";
00283    }
00284 }
00285 
00286 static void oh323_destroy_alias(struct oh323_alias *alias)
00287 {
00288    if (h323debug)
00289       ast_log(LOG_DEBUG, "Destroying alias '%s'\n", alias->name);
00290    free(alias);
00291 }
00292 
00293 static void oh323_destroy_user(struct oh323_user *user)
00294 {
00295    if (h323debug)
00296       ast_log(LOG_DEBUG, "Destroying user '%s'\n", user->name);
00297    ast_free_ha(user->ha);
00298    free(user);
00299 }
00300 
00301 static void oh323_destroy_peer(struct oh323_peer *peer)
00302 {
00303    if (h323debug)
00304       ast_log(LOG_DEBUG, "Destroying peer '%s'\n", peer->name);
00305    ast_free_ha(peer->ha);
00306    free(peer);
00307 }
00308 
00309 static int oh323_simulate_dtmf_end(const void *data)
00310 {
00311    struct oh323_pvt *pvt = (struct oh323_pvt *)data;
00312 
00313    if (pvt) {
00314       ast_mutex_lock(&pvt->lock);
00315       /* Don't hold pvt lock while trying to lock the channel */
00316       while(pvt->owner && ast_channel_trylock(pvt->owner)) {
00317          ast_mutex_unlock(&pvt->lock);
00318          usleep(1);
00319          ast_mutex_lock(&pvt->lock);
00320       }
00321 
00322       if (pvt->owner) {
00323          struct ast_frame f = {
00324             .frametype = AST_FRAME_DTMF_END,
00325             .subclass = pvt->curDTMF,
00326             .samples = 0,
00327             .src = "SIMULATE_DTMF_END",
00328          };
00329          ast_queue_frame(pvt->owner, &f);
00330          ast_channel_unlock(pvt->owner);
00331       }
00332 
00333       pvt->DTMFsched = -1;
00334       ast_mutex_unlock(&pvt->lock);
00335    }
00336 
00337    return 0;
00338 }
00339 
00340 /* Channel and private structures should be already locked */
00341 static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt)
00342 {
00343    if (c->nativeformats != pvt->nativeformats) {
00344       if (h323debug)
00345          ast_log(LOG_DEBUG, "Preparing %s for new native format\n", c->name);
00346       c->nativeformats = pvt->nativeformats;
00347       ast_set_read_format(c, c->readformat);
00348       ast_set_write_format(c, c->writeformat);
00349    }
00350    if (pvt->needhangup) {
00351       if (h323debug)
00352          ast_log(LOG_DEBUG, "Process pending hangup for %s\n", c->name);
00353       c->_softhangup |= AST_SOFTHANGUP_DEV;
00354       c->hangupcause = pvt->hangupcause;
00355       ast_queue_hangup(c);
00356       pvt->needhangup = 0;
00357       pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
00358    }
00359    if (pvt->newstate >= 0) {
00360       ast_setstate(c, pvt->newstate);
00361       pvt->newstate = -1;
00362    }
00363    if (pvt->newcontrol >= 0) {
00364       ast_queue_control(c, pvt->newcontrol);
00365       pvt->newcontrol = -1;
00366    }
00367    if (pvt->newdigit >= 0) {
00368       struct ast_frame f = {
00369          .frametype = AST_FRAME_DTMF_END,
00370          .subclass = pvt->newdigit,
00371          .samples = pvt->newduration * 8,
00372          .len = pvt->newduration,
00373          .src = "UPDATE_INFO",
00374       };
00375       if (pvt->newdigit == ' ') {      /* signalUpdate message */
00376          f.subclass = pvt->curDTMF;
00377          if (pvt->DTMFsched >= 0) {
00378             AST_SCHED_DEL(sched, pvt->DTMFsched);
00379          }
00380       } else {                /* Regular input or signal message */
00381          if (pvt->newduration) {    /* This is a signal, signalUpdate follows */
00382             f.frametype = AST_FRAME_DTMF_BEGIN;
00383             AST_SCHED_DEL(sched, pvt->DTMFsched);
00384             pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
00385             if (h323debug)
00386                ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
00387          }
00388          pvt->curDTMF = pvt->newdigit;
00389       }
00390       ast_queue_frame(c, &f);
00391       pvt->newdigit = -1;
00392    }
00393    if (pvt->update_rtp_info > 0) {
00394       if (pvt->rtp) {
00395          ast_jb_configure(c, &global_jbconf);
00396          c->fds[0] = ast_rtp_fd(pvt->rtp);
00397          c->fds[1] = ast_rtcp_fd(pvt->rtp);
00398          ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00399       }
00400       pvt->update_rtp_info = -1;
00401    }
00402 }
00403 
00404 /* Only channel structure should be locked */
00405 static void oh323_update_info(struct ast_channel *c)
00406 {
00407    struct oh323_pvt *pvt = c->tech_pvt;
00408 
00409    if (pvt) {
00410       ast_mutex_lock(&pvt->lock);
00411       __oh323_update_info(c, pvt);
00412       ast_mutex_unlock(&pvt->lock);
00413    }
00414 }
00415 
00416 static void cleanup_call_details(call_details_t *cd)
00417 {
00418    if (cd->call_token) {
00419       free(cd->call_token);
00420       cd->call_token = NULL;
00421    }
00422    if (cd->call_source_aliases) {
00423       free(cd->call_source_aliases);
00424       cd->call_source_aliases = NULL;
00425    }
00426    if (cd->call_dest_alias) {
00427       free(cd->call_dest_alias);
00428       cd->call_dest_alias = NULL;
00429    }
00430    if (cd->call_source_name) {
00431       free(cd->call_source_name);
00432       cd->call_source_name = NULL;
00433    }
00434    if (cd->call_source_e164) {
00435       free(cd->call_source_e164);
00436       cd->call_source_e164 = NULL;
00437    }
00438    if (cd->call_dest_e164) {
00439       free(cd->call_dest_e164);
00440       cd->call_dest_e164 = NULL;
00441    }
00442    if (cd->sourceIp) {
00443       free(cd->sourceIp);
00444       cd->sourceIp = NULL;
00445    }
00446    if (cd->redirect_number) {
00447       free(cd->redirect_number);
00448       cd->redirect_number = NULL;
00449    }
00450 }
00451 
00452 static void __oh323_destroy(struct oh323_pvt *pvt)
00453 {
00454    struct oh323_pvt *cur, *prev = NULL;
00455 
00456    AST_SCHED_DEL(sched, pvt->DTMFsched);
00457 
00458    if (pvt->rtp) {
00459       ast_rtp_destroy(pvt->rtp);
00460    }
00461 
00462    /* Free dsp used for in-band DTMF detection */
00463    if (pvt->vad) {
00464       ast_dsp_free(pvt->vad);
00465    }
00466    cleanup_call_details(&pvt->cd);
00467 
00468    /* Unlink us from the owner if we have one */
00469    if (pvt->owner) {
00470       ast_channel_lock(pvt->owner);
00471       if (h323debug)
00472          ast_log(LOG_DEBUG, "Detaching from %s\n", pvt->owner->name);
00473       pvt->owner->tech_pvt = NULL;
00474       ast_channel_unlock(pvt->owner);
00475    }
00476    cur = iflist;
00477    while(cur) {
00478       if (cur == pvt) {
00479          if (prev)
00480             prev->next = cur->next;
00481          else
00482             iflist = cur->next;
00483          break;
00484       }
00485       prev = cur;
00486       cur = cur->next;
00487    }
00488    if (!cur) {
00489       ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
00490    } else {
00491       ast_mutex_unlock(&pvt->lock);
00492       ast_mutex_destroy(&pvt->lock);
00493       free(pvt);
00494    }
00495 }
00496 
00497 static void oh323_destroy(struct oh323_pvt *pvt)
00498 {
00499    if (h323debug) {
00500       ast_log(LOG_DEBUG, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>"));
00501    }
00502    ast_mutex_lock(&iflock);
00503    ast_mutex_lock(&pvt->lock);
00504    __oh323_destroy(pvt);
00505    ast_mutex_unlock(&iflock);
00506 }
00507 
00508 static int oh323_digit_begin(struct ast_channel *c, char digit)
00509 {
00510    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00511    char *token;
00512 
00513    if (!pvt) {
00514       ast_log(LOG_ERROR, "No private structure?! This is bad\n");
00515       return -1;
00516    }
00517    ast_mutex_lock(&pvt->lock);
00518    if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && (pvt->dtmf_pt > 0)) {
00519       /* out-of-band DTMF */
00520       if (h323debug) {
00521          ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name);
00522       }
00523       ast_rtp_senddigit_begin(pvt->rtp, digit);
00524       ast_mutex_unlock(&pvt->lock);
00525    } else if (pvt->txDtmfDigit != digit) {
00526       /* in-band DTMF */
00527       if (h323debug) {
00528          ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name);
00529       }
00530       pvt->txDtmfDigit = digit;
00531       token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00532       ast_mutex_unlock(&pvt->lock);
00533       h323_send_tone(token, digit);
00534       if (token) {
00535          free(token);
00536       }
00537    } else
00538       ast_mutex_unlock(&pvt->lock);
00539    oh323_update_info(c);
00540    return 0;
00541 }
00542 
00543 /**
00544  * Send (play) the specified digit to the channel.
00545  *
00546  */
00547 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration)
00548 {
00549    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00550    char *token;
00551 
00552    if (!pvt) {
00553       ast_log(LOG_ERROR, "No private structure?! This is bad\n");
00554       return -1;
00555    }
00556    ast_mutex_lock(&pvt->lock);
00557    if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && (pvt->dtmf_pt > 0)) {
00558       /* out-of-band DTMF */
00559       if (h323debug) {
00560          ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s, duration %d\n", digit, c->name, duration);
00561       }
00562       ast_rtp_senddigit_end(pvt->rtp, digit);
00563       ast_mutex_unlock(&pvt->lock);
00564    } else {
00565       /* in-band DTMF */
00566       if (h323debug) {
00567          ast_log(LOG_DTMF, "End sending inband digit %c on %s, duration %d\n", digit, c->name, duration);
00568       }
00569       pvt->txDtmfDigit = ' ';
00570       token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00571       ast_mutex_unlock(&pvt->lock);
00572       h323_send_tone(token, ' ');
00573       if (token) {
00574          free(token);
00575       }
00576    }
00577    oh323_update_info(c);
00578    return 0;
00579 }
00580 
00581 /**
00582  * Make a call over the specified channel to the specified
00583  * destination.
00584  * Returns -1 on error, 0 on success.
00585  */
00586 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
00587 {
00588    int res = 0;
00589    struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
00590    const char *addr;
00591    char called_addr[1024];
00592 
00593    if (h323debug) {
00594       ast_log(LOG_DEBUG, "Calling to %s on %s\n", dest, c->name);
00595    }
00596    if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
00597       ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
00598       return -1;
00599    }
00600    ast_mutex_lock(&pvt->lock);
00601    if (!gatekeeper_disable) {
00602       if (ast_strlen_zero(pvt->exten)) {
00603          ast_copy_string(called_addr, dest, sizeof(called_addr));
00604       } else {
00605          snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest);
00606       }
00607    } else {
00608       res = htons(pvt->sa.sin_port);
00609       addr = ast_inet_ntoa(pvt->sa.sin_addr);
00610       if (ast_strlen_zero(pvt->exten)) {
00611          snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res);
00612       } else {
00613          snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res);
00614       }
00615    }
00616    /* make sure null terminated */
00617    called_addr[sizeof(called_addr) - 1] = '\0';
00618 
00619    if (c->cid.cid_num)
00620       ast_copy_string(pvt->options.cid_num, c->cid.cid_num, sizeof(pvt->options.cid_num));
00621 
00622    if (c->cid.cid_name)
00623       ast_copy_string(pvt->options.cid_name, c->cid.cid_name, sizeof(pvt->options.cid_name));
00624 
00625    if (c->cid.cid_rdnis) {
00626       ast_copy_string(pvt->options.cid_rdnis, c->cid.cid_rdnis, sizeof(pvt->options.cid_rdnis));
00627    }
00628 
00629    pvt->options.presentation = c->cid.cid_pres;
00630    pvt->options.type_of_number = c->cid.cid_ton;
00631 
00632    if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) {
00633       if (!strcasecmp(addr, "UNKNOWN"))
00634          pvt->options.redirect_reason = 0;
00635       else if (!strcasecmp(addr, "BUSY"))
00636          pvt->options.redirect_reason = 1;
00637       else if (!strcasecmp(addr, "NO_REPLY"))
00638          pvt->options.redirect_reason = 2;
00639       else if (!strcasecmp(addr, "UNCONDITIONAL"))
00640          pvt->options.redirect_reason = 15;
00641       else
00642          pvt->options.redirect_reason = -1;
00643    } else
00644       pvt->options.redirect_reason = -1;
00645 
00646    pvt->options.transfer_capability = c->transfercapability;
00647 
00648    /* indicate that this is an outgoing call */
00649    pvt->outgoing = 1;
00650 
00651    if (option_verbose > 2)
00652       ast_verbose(VERBOSE_PREFIX_3 "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability));
00653    if (h323debug)
00654       ast_log(LOG_DEBUG, "Placing outgoing call to %s, %d\n", called_addr, pvt->options.dtmfcodec);
00655    ast_mutex_unlock(&pvt->lock);
00656    res = h323_make_call(called_addr, &(pvt->cd), &pvt->options);
00657    if (res) {
00658       ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
00659       return -1;
00660    }
00661    oh323_update_info(c);
00662    return 0;
00663 }
00664 
00665 static int oh323_answer(struct ast_channel *c)
00666 {
00667    int res;
00668    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00669    char *token;
00670 
00671    if (h323debug)
00672       ast_log(LOG_DEBUG, "Answering on %s\n", c->name);
00673 
00674    ast_mutex_lock(&pvt->lock);
00675    token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00676    ast_mutex_unlock(&pvt->lock);
00677    res = h323_answering_call(token, 0);
00678    if (token)
00679       free(token);
00680 
00681    oh323_update_info(c);
00682    if (c->_state != AST_STATE_UP) {
00683       ast_setstate(c, AST_STATE_UP);
00684    }
00685    return res;
00686 }
00687 
00688 static int oh323_hangup(struct ast_channel *c)
00689 {
00690    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00691    int q931cause = AST_CAUSE_NORMAL_CLEARING;
00692    char *call_token;
00693 
00694 
00695    if (h323debug)
00696       ast_log(LOG_DEBUG, "Hanging up and scheduling destroy of call %s\n", c->name);
00697 
00698    if (!c->tech_pvt) {
00699       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00700       return 0;
00701    }
00702    ast_mutex_lock(&pvt->lock);
00703    /* Determine how to disconnect */
00704    if (pvt->owner != c) {
00705       ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
00706       ast_mutex_unlock(&pvt->lock);
00707       return 0;
00708    }
00709 
00710    pvt->owner = NULL;
00711    c->tech_pvt = NULL;
00712 
00713    if (c->hangupcause) {
00714       q931cause = c->hangupcause;
00715    } else {
00716       const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS");
00717       if (cause) {
00718          if (!strcmp(cause, "CONGESTION")) {
00719             q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION;
00720          } else if (!strcmp(cause, "BUSY")) {
00721             q931cause = AST_CAUSE_USER_BUSY;
00722          } else if (!strcmp(cause, "CHANISUNVAIL")) {
00723             q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
00724          } else if (!strcmp(cause, "NOANSWER")) {
00725             q931cause = AST_CAUSE_NO_ANSWER;
00726          } else if (!strcmp(cause, "CANCEL")) {
00727             q931cause = AST_CAUSE_CALL_REJECTED;
00728          }
00729       }
00730    }
00731 
00732    /* Start the process if it's not already started */
00733    if (!pvt->alreadygone && !pvt->hangupcause) {
00734       call_token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00735       if (call_token) {
00736          /* Release lock to eliminate deadlock */
00737          ast_mutex_unlock(&pvt->lock);
00738          if (h323_clear_call(call_token, q931cause)) {
00739             ast_log(LOG_WARNING, "ClearCall failed.\n");
00740          }
00741          free(call_token);
00742          ast_mutex_lock(&pvt->lock);
00743       }
00744    }
00745    pvt->needdestroy = 1;
00746    ast_mutex_unlock(&pvt->lock);
00747 
00748    /* Update usage counter */
00749    ast_module_unref(ast_module_info->self);
00750 
00751    return 0;
00752 }
00753 
00754 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
00755 {
00756    /* Retrieve audio/etc from channel. Assumes pvt->lock is already held. */
00757    struct ast_frame *f;
00758 
00759    /* Only apply it for the first packet, we just need the correct ip/port */
00760    if (pvt->options.nat) {
00761       ast_rtp_setnat(pvt->rtp, pvt->options.nat);
00762       pvt->options.nat = 0;
00763    }
00764 
00765    f = ast_rtp_read(pvt->rtp);
00766    /* Don't send RFC2833 if we're not supposed to */
00767    if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->options.dtmfmode & H323_DTMF_RFC2833)) {
00768       return &ast_null_frame;
00769    }
00770    if (pvt->owner) {
00771       /* We already hold the channel lock */
00772       if (f->frametype == AST_FRAME_VOICE) {
00773          if (f->subclass != pvt->owner->nativeformats) {
00774             /* Try to avoid deadlock */
00775             if (ast_channel_trylock(pvt->owner)) {
00776                ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n");
00777                return &ast_null_frame;
00778             }
00779             if (h323debug)
00780                ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
00781             pvt->owner->nativeformats = f->subclass;
00782             pvt->nativeformats = f->subclass;
00783             ast_set_read_format(pvt->owner, pvt->owner->readformat);
00784             ast_set_write_format(pvt->owner, pvt->owner->writeformat);
00785             ast_channel_unlock(pvt->owner);
00786          }
00787          /* Do in-band DTMF detection */
00788          if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) {
00789             if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) {
00790                if (!ast_channel_trylock(pvt->owner)) {
00791                   f = ast_dsp_process(pvt->owner, pvt->vad, f);
00792                   ast_channel_unlock(pvt->owner);
00793                }
00794                else
00795                   ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n");
00796             } else if (pvt->nativeformats && !pvt->noInbandDtmf) {
00797                ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(f->subclass));
00798                pvt->noInbandDtmf = 1;
00799             }
00800             if (f &&(f->frametype == AST_FRAME_DTMF)) {
00801                if (h323debug)
00802                   ast_log(LOG_DTMF, "Received in-band digit %c.\n", f->subclass);
00803             }
00804          }
00805       }
00806    }
00807    return f;
00808 }
00809 
00810 static struct ast_frame *oh323_read(struct ast_channel *c)
00811 {
00812    struct ast_frame *fr;
00813    struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
00814    ast_mutex_lock(&pvt->lock);
00815    __oh323_update_info(c, pvt);
00816    switch(c->fdno) {
00817    case 0:
00818       fr = oh323_rtp_read(pvt);
00819       break;
00820    case 1:
00821       if (pvt->rtp)
00822          fr = ast_rtcp_read(pvt->rtp);
00823       else
00824          fr = &ast_null_frame;
00825       break;
00826    default:
00827       ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name);
00828       fr = &ast_null_frame;
00829       break;
00830    }
00831    ast_mutex_unlock(&pvt->lock);
00832    return fr;
00833 }
00834 
00835 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
00836 {
00837    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00838    int res = 0;
00839    if (frame->frametype != AST_FRAME_VOICE) {
00840       if (frame->frametype == AST_FRAME_IMAGE) {
00841          return 0;
00842       } else {
00843          ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
00844          return 0;
00845       }
00846    } else {
00847       if (!(frame->subclass & c->nativeformats)) {
00848          ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
00849             frame->subclass, c->nativeformats, c->readformat, c->writeformat);
00850          return 0;
00851       }
00852    }
00853    if (pvt) {
00854       ast_mutex_lock(&pvt->lock);
00855       if (pvt->rtp && !pvt->recvonly)
00856          res = ast_rtp_write(pvt->rtp, frame);
00857       __oh323_update_info(c, pvt);
00858       ast_mutex_unlock(&pvt->lock);
00859    }
00860    return res;
00861 }
00862 
00863 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen)
00864 {
00865 
00866    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00867    char *token = (char *)NULL;
00868    int res = -1;
00869    int got_progress;
00870 
00871    ast_mutex_lock(&pvt->lock);
00872    token = (pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL);
00873    got_progress = pvt->got_progress;
00874    if (condition == AST_CONTROL_PROGRESS)
00875       pvt->got_progress = 1;
00876    else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION))
00877       pvt->alreadygone = 1;
00878    ast_mutex_unlock(&pvt->lock);
00879 
00880    if (h323debug)
00881       ast_log(LOG_DEBUG, "OH323: Indicating %d on %s\n", condition, token);
00882 
00883    switch(condition) {
00884    case AST_CONTROL_RINGING:
00885       if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
00886          h323_send_alerting(token);
00887          res = (got_progress ? 0 : -1);   /* Do not simulate any audio tones if we got PROGRESS message */
00888       }
00889       break;
00890    case AST_CONTROL_PROGRESS:
00891       if (c->_state != AST_STATE_UP) {
00892          /* Do not send PROGRESS message more than once */
00893          if (!got_progress)
00894             h323_send_progress(token);
00895          res = 0;
00896       }
00897       break;
00898    case AST_CONTROL_BUSY:
00899       if (c->_state != AST_STATE_UP) {
00900          h323_answering_call(token, 1);
00901          ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
00902          res = 0;
00903       }
00904       break;
00905    case AST_CONTROL_CONGESTION:
00906       if (c->_state != AST_STATE_UP) {
00907          h323_answering_call(token, 1);
00908          ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
00909          res = 0;
00910       }
00911       break;
00912    case AST_CONTROL_HOLD:
00913       ast_moh_start(c, data, NULL);
00914       res = 0;
00915       break;
00916    case AST_CONTROL_UNHOLD:
00917       ast_moh_stop(c);
00918       res = 0;
00919       break;
00920    case AST_CONTROL_SRCUPDATE:
00921       ast_rtp_new_source(pvt->rtp);
00922       res = 0;
00923       break;
00924    case AST_CONTROL_PROCEEDING:
00925    case -1:
00926       break;
00927    default:
00928       ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token);
00929       break;
00930    }
00931 
00932    if (h323debug)
00933       ast_log(LOG_DEBUG, "OH323: Indicated %d on %s, res=%d\n", condition, token, res);
00934    if (token)
00935       free(token);
00936    oh323_update_info(c);
00937 
00938    return res;
00939 }
00940 
00941 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
00942 {
00943    struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_pvt;
00944 
00945    ast_mutex_lock(&pvt->lock);
00946    if (pvt->owner != oldchan) {
00947       ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
00948       return -1;
00949    }
00950    pvt->owner = newchan;
00951    ast_mutex_unlock(&pvt->lock);
00952    return 0;
00953 }
00954 
00955 static int __oh323_rtp_create(struct oh323_pvt *pvt)
00956 {
00957    struct in_addr our_addr;
00958 
00959    if (pvt->rtp)
00960       return 0;
00961 
00962    if (ast_find_ourip(&our_addr, bindaddr)) {
00963       ast_mutex_unlock(&pvt->lock);
00964       ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
00965       return -1;
00966    }
00967    pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr);
00968    if (!pvt->rtp) {
00969       ast_mutex_unlock(&pvt->lock);
00970       ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
00971       return -1;
00972    }
00973    if (h323debug)
00974       ast_log(LOG_DEBUG, "Created RTP channel\n");
00975 
00976    ast_rtp_settos(pvt->rtp, tos);
00977 
00978    if (h323debug)
00979       ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->options.nat);
00980    ast_rtp_setnat(pvt->rtp, pvt->options.nat);
00981 
00982    if (pvt->dtmf_pt > 0)
00983       ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt, "audio", "telephone-event", 0);
00984 
00985    if (pvt->peercapability)
00986       ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
00987 
00988    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
00989       ast_jb_configure(pvt->owner, &global_jbconf);
00990       pvt->owner->fds[0] = ast_rtp_fd(pvt->rtp);
00991       pvt->owner->fds[1] = ast_rtcp_fd(pvt->rtp);
00992       ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00993       ast_channel_unlock(pvt->owner);
00994    } else
00995       pvt->update_rtp_info = 1;
00996 
00997    return 0;
00998 }
00999 
01000 /* Private structure should be locked on a call */
01001 static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host)
01002 {
01003    struct ast_channel *ch;
01004    char *cid_num, *cid_name;
01005    int fmt;
01006 
01007    if (!ast_strlen_zero(pvt->options.cid_num))
01008       cid_num = pvt->options.cid_num;
01009    else
01010       cid_num = pvt->cd.call_source_e164;
01011 
01012    if (!ast_strlen_zero(pvt->options.cid_name))
01013       cid_name = pvt->options.cid_name;
01014    else
01015       cid_name = pvt->cd.call_source_name;
01016    
01017    /* Don't hold a oh323_pvt lock while we allocate a chanel */
01018    ast_mutex_unlock(&pvt->lock);
01019    ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, pvt->amaflags, "H323/%s", host);
01020    /* Update usage counter */
01021    ast_module_ref(ast_module_info->self);
01022    ast_mutex_lock(&pvt->lock);
01023    if (ch) {
01024       ch->tech = &oh323_tech;
01025       if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
01026          fmt = global_options.capability;
01027       ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
01028       pvt->nativeformats = ch->nativeformats;
01029       fmt = ast_best_codec(ch->nativeformats);
01030       ch->writeformat = fmt;
01031       ch->rawwriteformat = fmt;
01032       ch->readformat = fmt;
01033       ch->rawreadformat = fmt;
01034 #if 0
01035       ch->fds[0] = ast_rtp_fd(pvt->rtp);
01036       ch->fds[1] = ast_rtcp_fd(pvt->rtp);
01037 #endif
01038 #ifdef VIDEO_SUPPORT
01039       if (pvt->vrtp) {
01040          ch->fds[2] = ast_rtp_fd(pvt->vrtp);
01041          ch->fds[3] = ast_rtcp_fd(pvt->vrtp);
01042       }
01043 #endif
01044 #ifdef T38_SUPPORT
01045       if (pvt->udptl) {
01046          ch->fds[4] = ast_udptl_fd(pvt->udptl);
01047       }
01048 #endif
01049       if (state == AST_STATE_RING) {
01050          ch->rings = 1;
01051       }
01052       /* Allocate dsp for in-band DTMF support */
01053       if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
01054          pvt->vad = ast_dsp_new();
01055          ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
01056       }
01057       /* Register channel functions. */
01058       ch->tech_pvt = pvt;
01059       /* Set the owner of this channel */
01060       pvt->owner = ch;
01061 
01062       ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
01063       ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
01064       ch->priority = 1;
01065       if (!ast_strlen_zero(pvt->accountcode)) {
01066          ast_string_field_set(ch, accountcode, pvt->accountcode);
01067       }
01068       if (pvt->amaflags) {
01069          ch->amaflags = pvt->amaflags;
01070       }
01071 
01072       /* Don't use ast_set_callerid() here because it will
01073        * generate a needless NewCallerID event */
01074       ch->cid.cid_ani = ast_strdup(cid_num);
01075 
01076       if (pvt->cd.redirect_reason >= 0) {
01077          ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number);
01078          pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
01079       }
01080       ch->cid.cid_pres = pvt->cd.presentation;
01081       ch->cid.cid_ton = pvt->cd.type_of_number;
01082 
01083       if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
01084          ch->cid.cid_dnid = strdup(pvt->exten);
01085       }
01086       if (pvt->cd.transfer_capability >= 0)
01087          ch->transfercapability = pvt->cd.transfer_capability;
01088       if (state != AST_STATE_DOWN) {
01089          if (ast_pbx_start(ch)) {
01090             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
01091             ast_hangup(ch);
01092             ch = NULL;
01093          }
01094       }
01095    } else {
01096       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
01097    }
01098    return ch;
01099 }
01100 
01101 static struct oh323_pvt *oh323_alloc(int callid)
01102 {
01103    struct oh323_pvt *pvt;
01104 
01105    pvt = (struct oh323_pvt *) malloc(sizeof(struct oh323_pvt));
01106    if (!pvt) {
01107       ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
01108       return NULL;
01109    }
01110    memset(pvt, 0, sizeof(struct oh323_pvt));
01111    pvt->cd.redirect_reason = -1;
01112    pvt->cd.transfer_capability = -1;
01113    /* Ensure the call token is allocated for outgoing call */
01114    if (!callid) {
01115       if ((pvt->cd).call_token == NULL) {
01116          (pvt->cd).call_token = (char *)malloc(128);
01117       }
01118       if (!pvt->cd.call_token) {
01119          ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
01120          ast_rtp_destroy(pvt->rtp);
01121          free(pvt);
01122          return NULL;
01123       }
01124       memset((char *)(pvt->cd).call_token, 0, 128);
01125       pvt->cd.call_reference = callid;
01126    }
01127    memcpy(&pvt->options, &global_options, sizeof(pvt->options));
01128    pvt->jointcapability = pvt->options.capability;
01129    if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01130       pvt->nonCodecCapability |= AST_RTP_DTMF;
01131    } else {
01132       pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01133    }
01134    ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
01135    pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1;
01136    ast_mutex_init(&pvt->lock);
01137    /* Add to interface list */
01138    ast_mutex_lock(&iflock);
01139    pvt->next = iflist;
01140    iflist = pvt;
01141    ast_mutex_unlock(&iflock);
01142    return pvt;
01143 }
01144 
01145 static struct oh323_pvt *find_call_locked(int call_reference, const char *token)
01146 {
01147    struct oh323_pvt *pvt;
01148 
01149    ast_mutex_lock(&iflock);
01150    pvt = iflist;
01151    while(pvt) {
01152       if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) {
01153          /* Found the call */
01154          if ((token != NULL) && (pvt->cd.call_token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
01155             ast_mutex_lock(&pvt->lock);
01156             ast_mutex_unlock(&iflock);
01157             return pvt;
01158          } else if (token == NULL) {
01159             ast_log(LOG_WARNING, "Call Token is NULL\n");
01160             ast_mutex_lock(&pvt->lock);
01161             ast_mutex_unlock(&iflock);
01162             return pvt;
01163          }
01164       }
01165       pvt = pvt->next;
01166    }
01167    ast_mutex_unlock(&iflock);
01168    return NULL;
01169 }
01170 
01171 static int update_state(struct oh323_pvt *pvt, int state, int signal)
01172 {
01173    if (!pvt)
01174       return 0;
01175    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01176       if (state >= 0)
01177          ast_setstate(pvt->owner, state);
01178       if (signal >= 0)
01179          ast_queue_control(pvt->owner, signal);
01180       ast_channel_unlock(pvt->owner);
01181       return 1;
01182    }
01183    else {
01184       if (state >= 0)
01185          pvt->newstate = state;
01186       if (signal >= 0)
01187          pvt->newcontrol = signal;
01188       return 0;
01189    }
01190 }
01191 
01192 static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01193 {
01194    struct oh323_alias *alias;
01195    int found = 0;
01196 
01197    alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
01198 
01199    if (alias)
01200       found++;
01201    else {
01202       if (!(alias = (struct oh323_alias *)calloc(1, sizeof(*alias))))
01203          return NULL;
01204       ASTOBJ_INIT(alias);
01205    }
01206    if (!found && name)
01207       ast_copy_string(alias->name, name, sizeof(alias->name));
01208    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01209       if (!strcasecmp(v->name, "e164")) {
01210          ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
01211       } else if (!strcasecmp(v->name, "prefix")) {
01212          ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
01213       } else if (!strcasecmp(v->name, "context")) {
01214          ast_copy_string(alias->context, v->value, sizeof(alias->context));
01215       } else if (!strcasecmp(v->name, "secret")) {
01216          ast_copy_string(alias->secret, v->value, sizeof(alias->secret));
01217       } else {
01218          if (strcasecmp(v->value, "h323")) {
01219             ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name);
01220          }
01221       }
01222    }
01223    ASTOBJ_UNMARK(alias);
01224    return alias;
01225 }
01226 
01227 static struct oh323_alias *realtime_alias(const char *alias)
01228 {
01229    struct ast_variable *var, *tmp;
01230    struct oh323_alias *a;
01231 
01232    var = ast_load_realtime("h323", "name", alias, NULL);
01233 
01234    if (!var)
01235       return NULL;
01236 
01237    for (tmp = var; tmp; tmp = tmp->next) {
01238       if (!strcasecmp(tmp->name, "type") &&
01239       !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) {
01240          ast_variables_destroy(var);
01241          return NULL;
01242       }
01243    }
01244 
01245    a = build_alias(alias, var, NULL, 1);
01246 
01247    ast_variables_destroy(var);
01248 
01249    return a;
01250 }
01251 
01252 #define DEPRECATED(_v, _new_opt) \
01253    ast_log(LOG_WARNING, "Option %s found at line %d has beed deprecated. Use %s instead.\n", (_v)->name, (_v)->lineno, (_new_opt))
01254 
01255 static int update_common_options(struct ast_variable *v, struct call_options *options)
01256 {
01257    int tmp;
01258 
01259    if (!strcasecmp(v->name, "allow")) {
01260       ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
01261    } else if (!strcasecmp(v->name, "autoframing")) {
01262       options->autoframing = ast_true(v->value);
01263    } else if (!strcasecmp(v->name, "disallow")) {
01264       ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
01265    } else if (!strcasecmp(v->name, "dtmfmode")) {
01266       if (!strcasecmp(v->value, "inband")) {
01267          options->dtmfmode = H323_DTMF_INBAND;
01268       } else if (!strcasecmp(v->value, "rfc2833")) {
01269          options->dtmfmode = H323_DTMF_RFC2833;
01270       } else {
01271          ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
01272          options->dtmfmode = H323_DTMF_RFC2833;
01273       }
01274    } else if (!strcasecmp(v->name, "dtmfcodec")) {
01275       tmp = atoi(v->value);
01276       if (tmp < 96)
01277          ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno);
01278       else
01279          options->dtmfcodec = tmp;
01280    } else if (!strcasecmp(v->name, "bridge")) {
01281       options->bridge = ast_true(v->value);
01282    } else if (!strcasecmp(v->name, "nat")) {
01283       options->nat = ast_true(v->value);
01284    } else if (!strcasecmp(v->name, "noFastStart")) {
01285       DEPRECATED(v, "fastStart");
01286       options->fastStart = !ast_true(v->value);
01287    } else if (!strcasecmp(v->name, "fastStart")) {
01288       options->fastStart = ast_true(v->value);
01289    } else if (!strcasecmp(v->name, "noH245Tunneling")) {
01290       DEPRECATED(v, "h245Tunneling");
01291       options->h245Tunneling = !ast_true(v->value);
01292    } else if (!strcasecmp(v->name, "h245Tunneling")) {
01293       options->h245Tunneling = ast_true(v->value);
01294    } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
01295       DEPRECATED(v, "silenceSuppression");
01296       options->silenceSuppression = !ast_true(v->value);
01297    } else if (!strcasecmp(v->name, "silenceSuppression")) {
01298       options->silenceSuppression = ast_true(v->value);
01299    } else if (!strcasecmp(v->name, "progress_setup")) {
01300       tmp = atoi(v->value);
01301       if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) {
01302          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
01303          tmp = 0;
01304       }
01305       options->progress_setup = tmp;
01306    } else if (!strcasecmp(v->name, "progress_alert")) {
01307       tmp = atoi(v->value);
01308       if ((tmp != 0) && (tmp != 1) && (tmp != 8)) {
01309          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
01310          tmp = 0;
01311       }
01312       options->progress_alert = tmp;
01313    } else if (!strcasecmp(v->name, "progress_audio")) {
01314       options->progress_audio = ast_true(v->value);
01315    } else if (!strcasecmp(v->name, "callerid")) {
01316       ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num));
01317    } else if (!strcasecmp(v->name, "fullname")) {
01318       ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name));
01319    } else if (!strcasecmp(v->name, "cid_number")) {
01320       ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num));
01321    } else if (!strcasecmp(v->name, "tunneling")) {
01322       if (!strcasecmp(v->value, "none"))
01323          options->tunnelOptions = 0;
01324       else if (!strcasecmp(v->value, "cisco"))
01325          options->tunnelOptions |= H323_TUNNEL_CISCO;
01326       else if (!strcasecmp(v->value, "qsig"))
01327          options->tunnelOptions |= H323_TUNNEL_QSIG;
01328       else
01329          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
01330    } else
01331       return 1;
01332 
01333    return 0;
01334 }
01335 #undef DEPRECATED
01336 
01337 static struct oh323_user *build_user(char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01338 {
01339    struct oh323_user *user;
01340    struct ast_ha *oldha;
01341    int found = 0;
01342    int format;
01343 
01344    user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp);
01345 
01346    if (user)
01347       found++;
01348    else {
01349       if (!(user = (struct oh323_user *)calloc(1, sizeof(*user))))
01350          return NULL;
01351       ASTOBJ_INIT(user);
01352    }
01353    oldha = user->ha;
01354    user->ha = (struct ast_ha *)NULL;
01355    memcpy(&user->options, &global_options, sizeof(user->options));
01356    /* Set default context */
01357    ast_copy_string(user->context, default_context, sizeof(user->context));
01358    if (user && !found)
01359       ast_copy_string(user->name, name, sizeof(user->name));
01360 
01361 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
01362    if (user->chanvars) {
01363       ast_variables_destroy(user->chanvars);
01364       user->chanvars = NULL;
01365    }
01366 #endif
01367 
01368    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01369       if (!update_common_options(v, &user->options))
01370          continue;
01371       if (!strcasecmp(v->name, "context")) {
01372          ast_copy_string(user->context, v->value, sizeof(user->context));
01373       } else if (!strcasecmp(v->name, "secret")) {
01374          ast_copy_string(user->secret, v->value, sizeof(user->secret));
01375       } else if (!strcasecmp(v->name, "accountcode")) {
01376          ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode));
01377       } else if (!strcasecmp(v->name, "host")) {
01378          if (!strcasecmp(v->value, "dynamic")) {
01379             ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
01380             ASTOBJ_UNREF(user, oh323_destroy_user);
01381             return NULL;
01382          } else if (ast_get_ip(&user->addr, v->value)) {
01383             ASTOBJ_UNREF(user, oh323_destroy_user);
01384             return NULL;
01385          }
01386          /* Let us know we need to use ip authentication */
01387          user->host = 1;
01388       } else if (!strcasecmp(v->name, "amaflags")) {
01389          format = ast_cdr_amaflags2int(v->value);
01390          if (format < 0) {
01391             ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
01392          } else {
01393             user->amaflags = format;
01394          }
01395       } else if (!strcasecmp(v->name, "permit") ||
01396                !strcasecmp(v->name, "deny")) {
01397          user->ha = ast_append_ha(v->name, v->value, user->ha);
01398       }
01399    }
01400    ASTOBJ_UNMARK(user);
01401    ast_free_ha(oldha);
01402    return user;
01403 }
01404 
01405 static struct oh323_user *realtime_user(const call_details_t *cd)
01406 {
01407    struct ast_variable *var, *tmp;
01408    struct oh323_user *user;
01409    char *username;
01410 
01411    if (userbyalias)
01412       var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, NULL);
01413    else {
01414       username = (char *)NULL;
01415       var = ast_load_realtime("h323", "host", cd->sourceIp, NULL);
01416    }
01417 
01418    if (!var)
01419       return NULL;
01420 
01421    for (tmp = var; tmp; tmp = tmp->next) {
01422       if (!strcasecmp(tmp->name, "type") &&
01423       !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) {
01424          ast_variables_destroy(var);
01425          return NULL;
01426       } else if (!username && !strcasecmp(tmp->name, "name"))
01427          username = tmp->value;
01428    }
01429 
01430    if (!username) {
01431       ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp);
01432       ast_variables_destroy(var);
01433       return NULL;
01434    }
01435 
01436    user = build_user(username, var, NULL, 1);
01437 
01438    ast_variables_destroy(var);
01439 
01440    return user;
01441 }
01442 
01443 static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01444 {
01445    struct oh323_peer *peer;
01446    struct ast_ha *oldha;
01447    int found = 0;
01448 
01449    peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp);
01450 
01451    if (peer)
01452       found++;
01453    else {
01454       if (!(peer = (struct oh323_peer*)calloc(1, sizeof(*peer))))
01455          return NULL;
01456       ASTOBJ_INIT(peer);
01457    }
01458    oldha = peer->ha;
01459    peer->ha = NULL;
01460    memcpy(&peer->options, &global_options, sizeof(peer->options));
01461    peer->addr.sin_port = htons(h323_signalling_port);
01462    peer->addr.sin_family = AF_INET;
01463    if (!found && name)
01464       ast_copy_string(peer->name, name, sizeof(peer->name));
01465 
01466 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
01467    if (peer->chanvars) {
01468       ast_variables_destroy(peer->chanvars);
01469       peer->chanvars = NULL;
01470    }
01471 #endif
01472    /* Default settings for mailbox */
01473    peer->mailbox[0] = '\0';
01474 
01475    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01476       if (!update_common_options(v, &peer->options))
01477          continue;
01478       if (!strcasecmp(v->name, "host")) {
01479          if (!strcasecmp(v->value, "dynamic")) {
01480             ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
01481             ASTOBJ_UNREF(peer, oh323_destroy_peer);
01482             return NULL;
01483          }
01484          if (ast_get_ip(&peer->addr, v->value)) {
01485             ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
01486             ASTOBJ_UNREF(peer, oh323_destroy_peer);
01487             return NULL;
01488          }
01489       } else if (!strcasecmp(v->name, "port")) {
01490          peer->addr.sin_port = htons(atoi(v->value));
01491       } else if (!strcasecmp(v->name, "permit") ||
01492                !strcasecmp(v->name, "deny")) {
01493          peer->ha = ast_append_ha(v->name, v->value, peer->ha);
01494       } else if (!strcasecmp(v->name, "mailbox")) {
01495          ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox));
01496       } else if (!strcasecmp(v->name, "hasvoicemail")) {
01497          if (ast_true(v->value) && ast_strlen_zero(peer->mailbox)) {
01498             ast_copy_string(peer->mailbox, name, sizeof(peer->mailbox));
01499          }
01500       }
01501    }
01502    ASTOBJ_UNMARK(peer);
01503    ast_free_ha(oldha);
01504    return peer;
01505 }
01506 
01507 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
01508 {
01509    struct oh323_peer *peer;
01510    struct ast_variable *var;
01511    struct ast_variable *tmp;
01512    const char *addr;
01513 
01514    /* First check on peer name */
01515    if (peername)
01516       var = ast_load_realtime("h323", "name", peername, addr = NULL);
01517    else if (sin) /* Then check on IP address for dynamic peers */
01518       var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL);
01519    else
01520       return NULL;
01521 
01522    if (!var)
01523       return NULL;
01524 
01525    for (tmp = var; tmp; tmp = tmp->next) {
01526       /* If this is type=user, then skip this object. */
01527       if (!strcasecmp(tmp->name, "type") &&
01528             !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
01529          ast_variables_destroy(var);
01530          return NULL;
01531       } else if (!peername && !strcasecmp(tmp->name, "name")) {
01532          peername = tmp->value;
01533       }
01534    }
01535 
01536    if (!peername) {  /* Did not find peer in realtime */
01537       ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
01538       ast_variables_destroy(var);
01539       return NULL;
01540    }
01541 
01542    /* Peer found in realtime, now build it in memory */
01543    peer = build_peer(peername, var, NULL, 1);
01544 
01545    ast_variables_destroy(var);
01546 
01547    return peer;
01548 }
01549 
01550 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
01551 {
01552    return strcmp(ast_inet_ntoa(inaddr), addr);
01553 }
01554 
01555 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
01556 {
01557    struct oh323_user *u;
01558 
01559    if (userbyalias)
01560       u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
01561    else
01562       u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
01563 
01564    if (!u && realtime)
01565       u = realtime_user(cd);
01566 
01567    if (!u && h323debug)
01568       ast_log(LOG_DEBUG, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
01569 
01570    return u;
01571 }
01572 
01573 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
01574 {
01575    int res;
01576 
01577    if (!sin)
01578       res = -1;
01579    else
01580       res = inaddrcmp(&addr , sin);
01581 
01582    return res;
01583 }
01584 
01585 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
01586 {
01587    struct oh323_peer *p;
01588 
01589    if (peer)
01590       p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
01591    else
01592       p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
01593 
01594    if (!p && realtime)
01595       p = realtime_peer(peer, sin);
01596 
01597    if (!p && h323debug)
01598       ast_log(LOG_DEBUG, "Could not find peer by name %s or address %s\n", (peer ? peer : "<NONE>"), (sin ? ast_inet_ntoa(sin->sin_addr) : "<NONE>"));
01599 
01600    return p;
01601 }
01602 
01603 static int create_addr(struct oh323_pvt *pvt, char *opeer)
01604 {
01605    struct hostent *hp;
01606    struct ast_hostent ahp;
01607    struct oh323_peer *p;
01608    int portno;
01609    int found = 0;
01610    char *port;
01611    char *hostn;
01612    char peer[256] = "";
01613 
01614    ast_copy_string(peer, opeer, sizeof(peer));
01615    port = strchr(peer, ':');
01616    if (port) {
01617       *port = '\0';
01618       port++;
01619    }
01620    pvt->sa.sin_family = AF_INET;
01621    p = find_peer(peer, NULL, 1);
01622    if (p) {
01623       found++;
01624       memcpy(&pvt->options, &p->options, sizeof(pvt->options));
01625       pvt->jointcapability = pvt->options.capability;
01626       if (pvt->options.dtmfmode) {
01627          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01628             pvt->nonCodecCapability |= AST_RTP_DTMF;
01629          } else {
01630             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01631          }
01632       }
01633       if (p->addr.sin_addr.s_addr) {
01634          pvt->sa.sin_addr = p->addr.sin_addr;
01635          pvt->sa.sin_port = p->addr.sin_port;
01636       }
01637       ASTOBJ_UNREF(p, oh323_destroy_peer);
01638    }
01639    if (!p && !found) {
01640       hostn = peer;
01641       if (port) {
01642          portno = atoi(port);
01643       } else {
01644          portno = h323_signalling_port;
01645       }
01646       hp = ast_gethostbyname(hostn, &ahp);
01647       if (hp) {
01648          memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
01649          pvt->sa.sin_port = htons(portno);
01650          /* Look peer by address */
01651          p = find_peer(NULL, &pvt->sa, 1);
01652          memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
01653          pvt->jointcapability = pvt->options.capability;
01654          if (p) {
01655             ASTOBJ_UNREF(p, oh323_destroy_peer);
01656          }
01657          if (pvt->options.dtmfmode) {
01658             if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01659                pvt->nonCodecCapability |= AST_RTP_DTMF;
01660             } else {
01661                pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01662             }
01663          }
01664          return 0;
01665       } else {
01666          ast_log(LOG_WARNING, "No such host: %s\n", peer);
01667          return -1;
01668       }
01669    } else if (!found) {
01670       return -1;
01671    } else {
01672       return 0;
01673    }
01674 }
01675 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause)
01676 {
01677    int oldformat;
01678    struct oh323_pvt *pvt;
01679    struct ast_channel *tmpc = NULL;
01680    char *dest = (char *)data;
01681    char *ext, *host;
01682    char *h323id = NULL;
01683    char tmp[256], tmp1[256];
01684 
01685    if (h323debug)
01686       ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
01687 
01688    pvt = oh323_alloc(0);
01689    if (!pvt) {
01690       ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
01691       return NULL;
01692    }
01693    oldformat = format;
01694    format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
01695    if (!format) {
01696       ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
01697       oh323_destroy(pvt);
01698       if (cause)
01699          *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
01700       return NULL;
01701    }
01702    ast_copy_string(tmp, dest, sizeof(tmp));
01703    host = strchr(tmp, '@');
01704    if (host) {
01705       *host = '\0';
01706       host++;
01707       ext = tmp;
01708    } else {
01709       ext = strrchr(tmp, '/');
01710       if (ext)
01711          *ext++ = '\0';
01712       host = tmp;
01713    }
01714    strtok_r(host, "/", &(h323id));
01715    if (!ast_strlen_zero(h323id)) {
01716       h323_set_id(h323id);
01717    }
01718    if (ext) {
01719       ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
01720    }
01721    if (h323debug)
01722       ast_log(LOG_DEBUG, "Extension: %s Host: %s\n", pvt->exten, host);
01723 
01724    if (gatekeeper_disable) {
01725       if (create_addr(pvt, host)) {
01726          oh323_destroy(pvt);
01727          if (cause)
01728             *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
01729          return NULL;
01730       }
01731    }
01732    else {
01733       memcpy(&pvt->options, &global_options, sizeof(pvt->options));
01734       pvt->jointcapability = pvt->options.capability;
01735       if (pvt->options.dtmfmode) {
01736          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01737             pvt->nonCodecCapability |= AST_RTP_DTMF;
01738          } else {
01739             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01740          }
01741       }
01742    }
01743 
01744    ast_mutex_lock(&caplock);
01745    /* Generate unique channel identifier */
01746    snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
01747    tmp1[sizeof(tmp1)-1] = '\0';
01748    ast_mutex_unlock(&caplock);
01749 
01750    ast_mutex_lock(&pvt->lock);
01751    tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1);
01752    ast_mutex_unlock(&pvt->lock);
01753    if (!tmpc) {
01754       oh323_destroy(pvt);
01755       if (cause)
01756          *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
01757    }
01758    ast_update_use_count();
01759    restart_monitor();
01760    return tmpc;
01761 }
01762 
01763 /** Find a call by alias */
01764 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
01765 {
01766    struct oh323_alias *a;
01767 
01768    a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
01769 
01770    if (!a && realtime)
01771       a = realtime_alias(source_aliases);
01772 
01773    return a;
01774 }
01775 
01776 /**
01777   * Callback for sending digits from H.323 up to asterisk
01778   *
01779   */
01780 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
01781 {
01782    struct oh323_pvt *pvt;
01783    int res;
01784 
01785    pvt = find_call_locked(call_reference, token);
01786    if (!pvt) {
01787       ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
01788       return -1;
01789    }
01790    if (h323debug)
01791       ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
01792 
01793    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01794       if (digit == '!')
01795          res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
01796       else {
01797          struct ast_frame f = {
01798             .frametype = AST_FRAME_DTMF_END,
01799             .subclass = digit,
01800             .samples = duration * 8,
01801             .len = duration,
01802             .src = "SEND_DIGIT",
01803          };
01804          if (digit == ' ') {     /* signalUpdate message */
01805             f.subclass = pvt->curDTMF;
01806             AST_SCHED_DEL(sched, pvt->DTMFsched);
01807          } else {          /* Regular input or signal message */
01808             if (pvt->DTMFsched >= 0) {
01809                /* We still don't send DTMF END from previous event, send it now */
01810                AST_SCHED_DEL(sched, pvt->DTMFsched);
01811                f.subclass = pvt->curDTMF;
01812                f.samples = f.len = 0;
01813                ast_queue_frame(pvt->owner, &f);
01814                /* Restore values */
01815                f.subclass = digit;
01816                f.samples = duration * 8;
01817                f.len = duration;
01818             }
01819             if (duration) {      /* This is a signal, signalUpdate follows */
01820                f.frametype = AST_FRAME_DTMF_BEGIN;
01821                pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
01822                if (h323debug)
01823                   ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
01824             }
01825             pvt->curDTMF = digit;
01826          }
01827          res = ast_queue_frame(pvt->owner, &f);
01828       }
01829       ast_channel_unlock(pvt->owner);
01830    } else {
01831       if (digit == '!')
01832          pvt->newcontrol = AST_CONTROL_FLASH;
01833       else {
01834          pvt->newduration = duration;
01835          pvt->newdigit = digit;
01836       }
01837       res = 0;
01838    }
01839    ast_mutex_unlock(&pvt->lock);
01840    return res;
01841 }
01842 
01843 /**
01844   * Callback function used to inform the H.323 stack of the local rtp ip/port details
01845   *
01846   * Returns the local RTP information
01847   */
01848 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
01849 {
01850    struct oh323_pvt *pvt;
01851    struct sockaddr_in us;
01852    struct rtp_info *info;
01853 
01854    info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
01855    if (!info) {
01856       ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
01857       return NULL;
01858    }
01859    pvt = find_call_locked(call_reference, token);
01860    if (!pvt) {
01861       free(info);
01862       ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
01863       return NULL;
01864    }
01865    if (!pvt->rtp)
01866       __oh323_rtp_create(pvt);
01867    if (!pvt->rtp) {
01868       ast_mutex_unlock(&pvt->lock);
01869       free(info);
01870       ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
01871       return NULL;
01872    }
01873    /* figure out our local RTP port and tell the H.323 stack about it */
01874    ast_rtp_get_us(pvt->rtp, &us);
01875    ast_mutex_unlock(&pvt->lock);
01876 
01877    ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
01878    info->port = ntohs(us.sin_port);
01879    if (h323debug)
01880       ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
01881    return info;
01882 }
01883 
01884 /**
01885  * Definition taken from rtp.c for rtpPayloadType because we need it here.
01886  */
01887 struct rtpPayloadType {
01888    int isAstFormat;  /* whether the following code is an AST_FORMAT */
01889    int code;
01890 };
01891 
01892 /**
01893   * Call-back function passing remote ip/port information from H.323 to asterisk
01894   *
01895   * Returns nothing
01896   */
01897 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
01898 {
01899    struct oh323_pvt *pvt;
01900    struct sockaddr_in them;
01901    struct rtpPayloadType rtptype;
01902    int nativeformats_changed;
01903    enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
01904 
01905    if (h323debug)
01906       ast_log(LOG_DEBUG, "Setting up RTP connection for %s\n", token);
01907 
01908    /* Find the call or allocate a private structure if call not found */
01909    pvt = find_call_locked(call_reference, token);
01910    if (!pvt) {
01911       ast_log(LOG_ERROR, "Something is wrong: rtp\n");
01912       return;
01913    }
01914    if (pvt->alreadygone) {
01915       ast_mutex_unlock(&pvt->lock);
01916       return;
01917    }
01918 
01919    if (!pvt->rtp)
01920       __oh323_rtp_create(pvt);
01921 
01922    them.sin_family = AF_INET;
01923    /* only works for IPv4 */
01924    them.sin_addr.s_addr = inet_addr(remoteIp);
01925    them.sin_port = htons(remotePort);
01926 
01927    if (them.sin_addr.s_addr) {
01928       ast_rtp_set_peer(pvt->rtp, &them);
01929       if (pvt->recvonly) {
01930          pvt->recvonly = 0;
01931          rtp_change = NEED_UNHOLD;
01932       }
01933    } else {
01934       ast_rtp_stop(pvt->rtp);
01935       if (!pvt->recvonly) {
01936          pvt->recvonly = 1;
01937          rtp_change = NEED_HOLD;
01938       }
01939    }
01940 
01941    /* Change native format to reflect information taken from OLC/OLCAck */
01942    nativeformats_changed = 0;
01943    if (pt != 128 && pvt->rtp) {  /* Payload type is invalid, so try to use previously decided */
01944       rtptype = ast_rtp_lookup_pt(pvt->rtp, pt);
01945       if (h323debug)
01946          ast_log(LOG_DEBUG, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt);
01947       if (pvt->nativeformats != rtptype.code) {
01948          pvt->nativeformats = rtptype.code;
01949          nativeformats_changed = 1;
01950       }
01951    } else if (h323debug)
01952       ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
01953 
01954    /* Don't try to lock the channel if nothing changed */
01955    if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
01956       if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01957          /* Re-build translation path only if native format(s) has been changed */
01958          if (pvt->owner->nativeformats != pvt->nativeformats) {
01959             if (h323debug)
01960                ast_log(LOG_DEBUG, "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);
01961             pvt->owner->nativeformats = pvt->nativeformats;
01962             ast_set_read_format(pvt->owner, pvt->owner->readformat);
01963             ast_set_write_format(pvt->owner, pvt->owner->writeformat);
01964          }
01965          if (pvt->options.progress_audio)
01966             ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
01967          switch (rtp_change) {
01968          case NEED_HOLD:
01969             ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
01970             break;
01971          case NEED_UNHOLD:
01972             ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
01973             break;
01974          default:
01975             break;
01976          }
01977          ast_channel_unlock(pvt->owner);
01978       }
01979       else {
01980          if (pvt->options.progress_audio)
01981             pvt->newcontrol = AST_CONTROL_PROGRESS;
01982          else if (rtp_change == NEED_HOLD)
01983             pvt->newcontrol = AST_CONTROL_HOLD;
01984          else if (rtp_change == NEED_UNHOLD)
01985             pvt->newcontrol = AST_CONTROL_UNHOLD;
01986          if (h323debug)
01987             ast_log(LOG_DEBUG, "RTP connection preparation for %s is pending...\n", token);
01988       }
01989    }
01990    ast_mutex_unlock(&pvt->lock);
01991 
01992    if (h323debug)
01993       ast_log(LOG_DEBUG, "RTP connection prepared for %s\n", token);
01994 
01995    return;
01996 }
01997 
01998 /**
01999   *   Call-back function to signal asterisk that the channel has been answered
02000   * Returns nothing
02001   */
02002 static void connection_made(unsigned call_reference, const char *token)
02003 {
02004    struct oh323_pvt *pvt;
02005 
02006    if (h323debug)
02007       ast_log(LOG_DEBUG, "Call %s answered\n", token);
02008 
02009    pvt = find_call_locked(call_reference, token);
02010    if (!pvt) {
02011       ast_log(LOG_ERROR, "Something is wrong: connection\n");
02012       return;
02013    }
02014 
02015    /* Inform asterisk about remote party connected only on outgoing calls */
02016    if (!pvt->outgoing) {
02017       ast_mutex_unlock(&pvt->lock);
02018       return;
02019    }
02020    /* Do not send ANSWER message more than once */
02021    if (!pvt->connection_established) {
02022       pvt->connection_established = 1;
02023       update_state(pvt, -1, AST_CONTROL_ANSWER);
02024    }
02025    ast_mutex_unlock(&pvt->lock);
02026    return;
02027 }
02028 
02029 static int progress(unsigned call_reference, const char *token, int inband)
02030 {
02031    struct oh323_pvt *pvt;
02032 
02033    if (h323debug)
02034       ast_log(LOG_DEBUG, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
02035 
02036    pvt = find_call_locked(call_reference, token);
02037    if (!pvt) {
02038       ast_log(LOG_ERROR, "Private structure not found in progress.\n");
02039       return -1;
02040    }
02041    if (!pvt->owner) {
02042       ast_mutex_unlock(&pvt->lock);
02043       ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
02044       return -1;
02045    }
02046    update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
02047    ast_mutex_unlock(&pvt->lock);
02048 
02049    return 0;
02050 }
02051 
02052 /**
02053  *  Call-back function for incoming calls
02054  *
02055  *  Returns 1 on success
02056  */
02057 static call_options_t *setup_incoming_call(call_details_t *cd)
02058 {
02059    struct oh323_pvt *pvt;
02060    struct oh323_user *user = NULL;
02061    struct oh323_alias *alias = NULL;
02062 
02063    if (h323debug)
02064       ast_log(LOG_DEBUG, "Setting up incoming call for %s\n", cd->call_token);
02065 
02066    /* allocate the call*/
02067    pvt = oh323_alloc(cd->call_reference);
02068 
02069    if (!pvt) {
02070       ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
02071       cleanup_call_details(cd);
02072       return NULL;
02073    }
02074 
02075    /* Populate the call details in the private structure */
02076    memcpy(&pvt->cd, cd, sizeof(pvt->cd));
02077    memcpy(&pvt->options, &global_options, sizeof(pvt->options));
02078    pvt->jointcapability = pvt->options.capability;
02079 
02080    if (h323debug) {
02081       ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
02082       ast_verbose(VERBOSE_PREFIX_3 " \tCall token:  [%s]\n", pvt->cd.call_token);
02083       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
02084       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
02085       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
02086       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
02087       if (pvt->cd.redirect_reason >= 0)
02088          ast_verbose(VERBOSE_PREFIX_3 " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
02089       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
02090    }
02091 
02092    /* Decide if we are allowing Gatekeeper routed calls*/
02093    if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
02094       if (!ast_strlen_zero(cd->call_dest_e164)) {
02095          ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02096          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02097       } else {
02098          alias = find_alias(cd->call_dest_alias, 1);
02099          if (!alias) {
02100             ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
02101             oh323_destroy(pvt);
02102             return NULL;
02103          }
02104          ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
02105          ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
02106       }
02107    } else {
02108       /* Either this call is not from the Gatekeeper
02109          or we are not allowing gk routed calls */
02110       user = find_user(cd, 1);
02111       if (!user) {
02112          if (!acceptAnonymous) {
02113             ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02114             oh323_destroy(pvt);
02115             return NULL;
02116          }
02117          if (ast_strlen_zero(default_context)) {
02118             ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02119             oh323_destroy(pvt);
02120             return NULL;
02121          }
02122          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02123          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02124             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02125          } else {
02126             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02127          }
02128          if (h323debug)
02129             ast_log(LOG_DEBUG, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
02130       } else {
02131          if (user->host) {
02132             if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
02133                if (ast_strlen_zero(user->context)) {
02134                   if (ast_strlen_zero(default_context)) {
02135                      ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
02136                      oh323_destroy(pvt);
02137                      ASTOBJ_UNREF(user, oh323_destroy_user);
02138                      return NULL;
02139                   }
02140                   ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02141                } else {
02142                   ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02143                }
02144                pvt->exten[0] = 'i';
02145                pvt->exten[1] = '\0';
02146                ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
02147                oh323_destroy(pvt);
02148                ASTOBJ_UNREF(user, oh323_destroy_user);
02149                return NULL;   /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
02150             }
02151          }
02152          ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02153          memcpy(&pvt->options, &user->options, sizeof(pvt->options));
02154          pvt->jointcapability = pvt->options.capability;
02155          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02156             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02157          } else {
02158             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02159          }
02160          if (!ast_strlen_zero(user->accountcode)) {
02161             ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
02162          }
02163          if (user->amaflags) {
02164             pvt->amaflags = user->amaflags;
02165          }
02166          ASTOBJ_UNREF(user, oh323_destroy_user);
02167       }
02168    }
02169    return &pvt->options;
02170 }
02171 
02172 /**
02173  * Call-back function to start PBX when OpenH323 ready to serve incoming call
02174  *
02175  * Returns 1 on success
02176  */
02177 static int answer_call(unsigned call_reference, const char *token)
02178 {
02179    struct oh323_pvt *pvt;
02180    struct ast_channel *c = NULL;
02181    enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
02182    char tmp_exten[sizeof(pvt->exten)];
02183 
02184    if (h323debug)
02185       ast_log(LOG_DEBUG, "Preparing Asterisk to answer for %s\n", token);
02186 
02187    /* Find the call or allocate a private structure if call not found */
02188    pvt = find_call_locked(call_reference, token);
02189    if (!pvt) {
02190       ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
02191       return 0;
02192    }
02193    /* Check if requested extension@context pair exists in the dialplan */
02194    ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
02195 
02196    /* Try to find best extension in specified context */
02197    if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
02198       if (tmp_exten[0] == 's')
02199          try_exten = ext_s;
02200       else if (tmp_exten[0] == 'i')
02201          try_exten = ext_i;
02202       else
02203          try_exten = ext_original;
02204    } else
02205       try_exten = ext_original;
02206    do {
02207       if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
02208          break;
02209       switch (try_exten) {
02210       case ext_original:
02211          tmp_exten[0] = 's';
02212          tmp_exten[1] = '\0';
02213          try_exten = ext_s;
02214          break;
02215       case ext_s:
02216          tmp_exten[0] = 'i';
02217          try_exten = ext_i;
02218          break;
02219       case ext_i:
02220          try_exten = ext_notexists;
02221          break;
02222       default:
02223          break;
02224       }
02225    } while (try_exten != ext_notexists);
02226 
02227    /* Drop the call if we don't have <exten>, s and i extensions */
02228    if (try_exten == ext_notexists) {
02229       ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
02230       ast_mutex_unlock(&pvt->lock);
02231       h323_clear_call(token, AST_CAUSE_UNALLOCATED);
02232       return 0;
02233    } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
02234       if (h323debug)
02235          ast_log(LOG_DEBUG, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
02236       ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
02237    }
02238 
02239    /* allocate a channel and tell asterisk about it */
02240    c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
02241 
02242    /* And release when done */
02243    ast_mutex_unlock(&pvt->lock);
02244    if (!c) {
02245       ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
02246       return 0;
02247    }
02248    return 1;
02249 }
02250 
02251 /**
02252  * Call-back function to establish an outgoing H.323 call
02253  *
02254  * Returns 1 on success
02255  */
02256 static int setup_outgoing_call(call_details_t *cd)
02257 {
02258    /* Use argument here or free it immediately */
02259    cleanup_call_details(cd);
02260 
02261    return 1;
02262 }
02263 
02264 /**
02265   *  Call-back function to signal asterisk that the channel is ringing
02266   *  Returns nothing
02267   */
02268 static void chan_ringing(unsigned call_reference, const char *token)
02269 {
02270    struct oh323_pvt *pvt;
02271 
02272    if (h323debug)
02273       ast_log(LOG_DEBUG, "Ringing on %s\n", token);
02274 
02275    pvt = find_call_locked(call_reference, token);
02276    if (!pvt) {
02277       ast_log(LOG_ERROR, "Something is wrong: ringing\n");
02278       return;
02279    }
02280    if (!pvt->owner) {
02281       ast_mutex_unlock(&pvt->lock);
02282       ast_log(LOG_ERROR, "Channel has no owner\n");
02283       return;
02284    }
02285    update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
02286    ast_mutex_unlock(&pvt->lock);
02287    return;
02288 }
02289 
02290 /**
02291   * Call-back function to cleanup communication
02292   * Returns nothing,
02293   */
02294 static void cleanup_connection(unsigned call_reference, const char *call_token)
02295 {
02296    struct oh323_pvt *pvt;
02297 
02298    if (h323debug)
02299       ast_log(LOG_DEBUG, "Cleaning connection to %s\n", call_token);
02300 
02301    while (1) {
02302       pvt = find_call_locked(call_reference, call_token);
02303       if (!pvt) {
02304          if (h323debug)
02305             ast_log(LOG_DEBUG, "No connection for %s\n", call_token);
02306          return;
02307       }
02308       if (!pvt->owner || !ast_channel_trylock(pvt->owner))
02309          break;
02310 #if 1
02311 #ifdef DEBUG_THREADS
02312       ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s, locked at %ld/%d by %s (%s:%d)\n", call_token, pvt->owner->lock.thread[0], pvt->owner->lock.reentrancy, pvt->owner->lock.func[0], pvt->owner->lock.file[0], pvt->owner->lock.lineno[0]);
02313 #else
02314       ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
02315 #endif
02316 #endif
02317       ast_mutex_unlock(&pvt->lock);
02318       usleep(1);
02319    }
02320    if (pvt->rtp) {
02321       /* Immediately stop RTP */
02322       ast_rtp_destroy(pvt->rtp);
02323       pvt->rtp = NULL;
02324    }
02325    /* Free dsp used for in-band DTMF detection */
02326    if (pvt->vad) {
02327       ast_dsp_free(pvt->vad);
02328       pvt->vad = NULL;
02329    }
02330    cleanup_call_details(&pvt->cd);
02331    pvt->alreadygone = 1;
02332    /* Send hangup */
02333    if (pvt->owner) {
02334       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02335       ast_queue_hangup(pvt->owner);
02336       ast_channel_unlock(pvt->owner);
02337    }
02338    ast_mutex_unlock(&pvt->lock);
02339    if (h323debug)
02340       ast_log(LOG_DEBUG, "Connection to %s cleaned\n", call_token);
02341    return;
02342 }
02343 
02344 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
02345 {
02346    struct oh323_pvt *pvt;
02347 
02348    if (h323debug) {
02349       ast_log(LOG_DEBUG, "Hanging up connection to %s with cause %d\n", token, cause);
02350    }
02351 
02352    pvt = find_call_locked(call_reference, token);
02353    if (!pvt) {
02354       if (h323debug) {
02355          ast_log(LOG_DEBUG, "Connection to %s already cleared\n", token);
02356       }
02357       return;
02358    }
02359    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
02360       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02361       pvt->owner->hangupcause = pvt->hangupcause = cause;
02362       ast_queue_hangup(pvt->owner);
02363       ast_channel_unlock(pvt->owner);
02364    }
02365    else {
02366       pvt->needhangup = 1;
02367       pvt->hangupcause = cause;
02368       if (h323debug)
02369          ast_log(LOG_DEBUG, "Hangup for %s is pending\n", token);
02370    }
02371    ast_mutex_unlock(&pvt->lock);
02372 }
02373 
02374 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload)
02375 {
02376    struct oh323_pvt *pvt;
02377 
02378    if (h323debug)
02379       ast_log(LOG_DEBUG, "Setting DTMF payload to %d on %s\n", payload, token);
02380 
02381    pvt = find_call_locked(call_reference, token);
02382    if (!pvt) {
02383       return;
02384    }
02385    if (pvt->rtp) {
02386       ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", "telephone-event", 0);
02387    }
02388    pvt->dtmf_pt = payload;
02389    ast_mutex_unlock(&pvt->lock);
02390    if (h323debug)
02391       ast_log(LOG_DEBUG, "DTMF payload on %s set to %d\n", token, payload);
02392 }
02393 
02394 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
02395 {
02396    struct oh323_pvt *pvt;
02397 
02398    if (h323debug)
02399       ast_log(LOG_DEBUG, "Got remote capabilities from connection %s\n", token);
02400 
02401    pvt = find_call_locked(call_reference, token);
02402    if (!pvt)
02403       return;
02404    pvt->peercapability = capabilities;
02405    pvt->jointcapability = pvt->options.capability & capabilities;
02406    if (prefs) {
02407       memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
02408       if (h323debug) {
02409          int i;
02410          for (i = 0; i < 32; ++i) {
02411             if (!prefs->order[i])
02412                break;
02413             ast_log(LOG_DEBUG, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
02414          }
02415       }
02416       if (pvt->rtp) {
02417          if (pvt->options.autoframing) {
02418             ast_log(LOG_DEBUG, "Autoframing option set, using peer's packetization settings\n");
02419             ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
02420          } else {
02421             ast_log(LOG_DEBUG, "Autoframing option not set, using ignoring peer's packetization settings\n");
02422             ast_rtp_codec_setpref(pvt->rtp, &pvt->options.prefs);
02423          }
02424       }
02425    }
02426    ast_mutex_unlock(&pvt->lock);
02427 }
02428 
02429 static void set_local_capabilities(unsigned call_reference, const char *token)
02430 {
02431    struct oh323_pvt *pvt;
02432    int capability, dtmfmode, pref_codec;
02433    struct ast_codec_pref prefs;
02434 
02435    if (h323debug)
02436       ast_log(LOG_DEBUG, "Setting capabilities for connection %s\n", token);
02437 
02438    pvt = find_call_locked(call_reference, token);
02439    if (!pvt)
02440       return;
02441    capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
02442    dtmfmode = pvt->options.dtmfmode;
02443    prefs = pvt->options.prefs;
02444    pref_codec = pvt->pref_codec;
02445    ast_mutex_unlock(&pvt->lock);
02446    h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
02447 
02448    if (h323debug) {
02449       int i;
02450       for (i = 0; i < 32; i++) {
02451          if (!prefs.order[i])
02452             break;
02453          ast_log(LOG_DEBUG, "local prefs[%d]=%s:%d\n", i, (prefs.order[i] ? ast_getformatname(1 << (prefs.order[i]-1)) : "<none>"), prefs.framing[i]);
02454       }
02455       ast_log(LOG_DEBUG, "Capabilities for connection %s is set\n", token);
02456    }
02457 }
02458 
02459 static void *do_monitor(void *data)
02460 {
02461    int res;
02462    int reloading;
02463    struct oh323_pvt *oh323 = NULL;
02464 
02465    for(;;) {
02466       /* Check for a reload request */
02467       ast_mutex_lock(&h323_reload_lock);
02468       reloading = h323_reloading;
02469       h323_reloading = 0;
02470       ast_mutex_unlock(&h323_reload_lock);
02471       if (reloading) {
02472          if (option_verbose > 0) {
02473             ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
02474          }
02475          h323_do_reload();
02476       }
02477       /* Check for interfaces needing to be killed */
02478       if (!ast_mutex_trylock(&iflock)) {
02479 #if 1
02480          do {
02481             for (oh323 = iflist; oh323; oh323 = oh323->next) {
02482                if (!ast_mutex_trylock(&oh323->lock)) {
02483                   if (oh323->needdestroy) {
02484                      __oh323_destroy(oh323);
02485                      break;
02486                   }
02487                   ast_mutex_unlock(&oh323->lock);
02488                }
02489             }
02490          } while (/*oh323*/ 0);
02491 #else
02492 restartsearch:
02493          oh323 = iflist;
02494          while(oh323) {
02495             if (!ast_mutex_trylock(&oh323->lock)) {
02496                if (oh323->needdestroy) {
02497                   __oh323_destroy(oh323);
02498                   goto restartsearch;
02499                }
02500                ast_mutex_unlock(&oh323->lock);
02501                oh323 = oh323->next;
02502             }
02503          }
02504 #endif
02505          ast_mutex_unlock(&iflock);
02506       } else
02507          oh323 = (struct oh323_pvt *)1;   /* Force fast loop */
02508       pthread_testcancel();
02509       /* Wait for sched or io */
02510       res = ast_sched_wait(sched);
02511       if ((res < 0) || (res > 1000)) {
02512          res = 1000;
02513       }
02514       /* Do not wait if some channel(s) is destroyed, probably, more available too */
02515       if (oh323)
02516          res = 1;
02517       res = ast_io_wait(io, res);
02518       pthread_testcancel();
02519       ast_mutex_lock(&monlock);
02520       if (res >= 0) {
02521          ast_sched_runq(sched);
02522       }
02523       ast_mutex_unlock(&monlock);
02524    }
02525    /* Never reached */
02526    return NULL;
02527 }
02528 
02529 static int restart_monitor(void)
02530 {
02531    /* If we're supposed to be stopped -- stay stopped */
02532    if (ast_mutex_lock(&monlock)) {
02533       ast_log(LOG_WARNING, "Unable to lock monitor\n");
02534       return -1;
02535    }
02536    if (monitor_thread == AST_PTHREADT_STOP) {
02537       ast_mutex_unlock(&monlock);
02538       return 0;
02539    }
02540    if (monitor_thread == pthread_self()) {
02541       ast_mutex_unlock(&monlock);
02542       ast_log(LOG_WARNING, "Cannot kill myself\n");
02543       return -1;
02544    }
02545    if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
02546       /* Wake up the thread */
02547       pthread_kill(monitor_thread, SIGURG);
02548    } else {
02549       /* Start a new monitor */
02550       if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
02551          monitor_thread = AST_PTHREADT_NULL;
02552          ast_mutex_unlock(&monlock);
02553          ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
02554          return -1;
02555       }
02556    }
02557    ast_mutex_unlock(&monlock);
02558    return 0;
02559 }
02560 
02561 static int h323_do_trace(int fd, int argc, char *argv[])
02562 {
02563    if (argc != 4) {
02564       return RESULT_SHOWUSAGE;
02565    }
02566    h323_debug(1, atoi(argv[3]));
02567    ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
02568    return RESULT_SUCCESS;
02569 }
02570 
02571 static int h323_no_trace(int fd, int argc, char *argv[])
02572 {
02573    if (argc < 3 || argc > 4) {
02574       return RESULT_SHOWUSAGE;
02575    }
02576    h323_debug(0,0);
02577    ast_cli(fd, "H.323 trace disabled\n");
02578    return RESULT_SUCCESS;
02579 }
02580 
02581 static int h323_do_debug(int fd, int argc, char *argv[])
02582 {
02583    if (argc < 2 || argc > 3) {
02584       return RESULT_SHOWUSAGE;
02585    }
02586    h323debug = 1;
02587    ast_cli(fd, "H.323 debug enabled\n");
02588    return RESULT_SUCCESS;
02589 }
02590 
02591 static int h323_no_debug(int fd, int argc, char *argv[])
02592 {
02593    if (argc < 3 || argc > 4) {
02594       return RESULT_SHOWUSAGE;
02595    }
02596    h323debug = 0;
02597    ast_cli(fd, "H.323 debug disabled\n");
02598    return RESULT_SUCCESS;
02599 }
02600 
02601 static int h323_gk_cycle(int fd, int argc, char *argv[])
02602 {
02603    if (argc != 3) {
02604       return RESULT_SHOWUSAGE;
02605    }
02606    h323_gk_urq();
02607 
02608    /* Possibly register with a GK */
02609    if (!gatekeeper_disable) {
02610       if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
02611          ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
02612       }
02613    }
02614    return RESULT_SUCCESS;
02615 }
02616 
02617 static int h323_ep_hangup(int fd, int argc, char *argv[])
02618 {
02619    if (argc != 3) {
02620       return RESULT_SHOWUSAGE;
02621    }
02622    if (h323_soft_hangup(argv[2])) {
02623       ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
02624    } else {
02625       ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
02626    }
02627    return RESULT_SUCCESS;
02628 }
02629 
02630 static int h323_tokens_show(int fd, int argc, char *argv[])
02631 {
02632    if (argc != 3) {
02633       return RESULT_SHOWUSAGE;
02634    }
02635    h323_show_tokens();
02636    return RESULT_SUCCESS;
02637 }
02638 
02639 static int h323_version_show(int fd, int argc, char *argv[])
02640 {
02641    if (argc != 3) {
02642       return RESULT_SHOWUSAGE;
02643    }
02644    h323_show_version();
02645    return RESULT_SUCCESS;
02646 }
02647 
02648 static char trace_usage[] =
02649 "Usage: h.323 trace <level num>\n"
02650 "       Enables H.323 stack tracing for debugging purposes\n";
02651 
02652 static char no_trace_usage[] =
02653 "Usage: h.323 trace off\n"
02654 "       Disables H.323 stack tracing for debugging purposes\n";
02655 
02656 static char debug_usage[] =
02657 "Usage: h.323 debug\n"
02658 "       Enables H.323 debug output\n";
02659 
02660 static char no_debug_usage[] =
02661 "Usage: h.323 debug off\n"
02662 "       Disables H.323 debug output\n";
02663 
02664 static char show_cycle_usage[] =
02665 "Usage: h.323 gk cycle\n"
02666 "       Manually re-register with the Gatekeper (Currently Disabled)\n";
02667 
02668 static char show_hangup_usage[] =
02669 "Usage: h.323 hangup <token>\n"
02670 "       Manually try to hang up call identified by <token>\n";
02671 
02672 static char show_tokens_usage[] =
02673 "Usage: h.323 show tokens\n"
02674 "       Print out all active call tokens\n";
02675 
02676 static char show_version_usage[] =
02677 "Usage: h.323 show version\n"
02678 "     Print the version of the H.323 library in use\n";
02679 
02680 static char h323_reload_usage[] =
02681 "Usage: h323 reload\n"
02682 "       Reloads H.323 configuration from h323.conf\n";
02683 
02684 static struct ast_cli_entry cli_h323_no_trace_deprecated = {
02685    { "h.323", "no", "trace", NULL },
02686    h323_no_trace, "Disable H.323 Stack Tracing",
02687    no_trace_usage };
02688 
02689 static struct ast_cli_entry cli_h323_no_debug_deprecated = {
02690    { "h.323", "no", "debug", NULL },
02691    h323_no_debug, "Disable H.323 debug",
02692    no_debug_usage };
02693 
02694 static struct ast_cli_entry cli_h323_debug_deprecated = {
02695    { "h.323", "debug", NULL },
02696    h323_do_debug, "Enable H.323 debug",
02697    debug_usage };
02698 
02699 static struct ast_cli_entry cli_h323_trace_deprecated = {
02700    { "h.323", "trace", NULL },
02701    h323_do_trace, "Enable H.323 Stack Tracing",
02702    trace_usage };
02703 
02704 static struct ast_cli_entry cli_h323_gk_cycle_deprecated = {
02705    { "h.323", "gk", "cycle", NULL },
02706    h323_gk_cycle, "Manually re-register with the Gatekeper",
02707    show_cycle_usage };
02708 
02709 static struct ast_cli_entry cli_h323[] = {
02710    { { "h323", "set", "trace", NULL },
02711    h323_do_trace, "Enable H.323 Stack Tracing",
02712    trace_usage, NULL, &cli_h323_trace_deprecated },
02713 
02714    { { "h323", "set", "trace", "off", NULL },
02715    h323_no_trace, "Disable H.323 Stack Tracing",
02716    no_trace_usage, NULL, &cli_h323_no_trace_deprecated },
02717 
02718    { { "h323", "set", "debug", NULL },
02719    h323_do_debug, "Enable H.323 debug",
02720    debug_usage, NULL, &cli_h323_debug_deprecated },
02721 
02722    { { "h323", "set", "debug", "off", NULL },
02723    h323_no_debug, "Disable H.323 debug",
02724    no_debug_usage, NULL, &cli_h323_no_debug_deprecated },
02725 
02726    { { "h323", "cycle", "gk", NULL },
02727    h323_gk_cycle, "Manually re-register with the Gatekeper",
02728    show_cycle_usage, NULL, &cli_h323_gk_cycle_deprecated },
02729 
02730    { { "h323", "hangup", NULL },
02731    h323_ep_hangup, "Manually try to hang up a call",
02732    show_hangup_usage },
02733 
02734    { { "h323", "show", "tokens", NULL },
02735    h323_tokens_show, "Show all active call tokens",
02736    show_tokens_usage },
02737 
02738    { { "h323", "show", "version", NULL },
02739    h323_version_show, "Show the version of the H.323 library in use",
02740    show_version_usage },
02741 };
02742 
02743 static void delete_users(void)
02744 {
02745    int pruned = 0;
02746 
02747    /* Delete all users */
02748    ASTOBJ_CONTAINER_WRLOCK(&userl);
02749    ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
02750       ASTOBJ_RDLOCK(iterator);
02751       ASTOBJ_MARK(iterator);
02752       ++pruned;
02753       ASTOBJ_UNLOCK(iterator);
02754    } while (0) );
02755    if (pruned) {
02756       ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
02757    }
02758    ASTOBJ_CONTAINER_UNLOCK(&userl);
02759 
02760    ASTOBJ_CONTAINER_WRLOCK(&peerl);
02761    ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
02762       ASTOBJ_RDLOCK(iterator);
02763       ASTOBJ_MARK(iterator);
02764       ASTOBJ_UNLOCK(iterator);
02765    } while (0) );
02766    ASTOBJ_CONTAINER_UNLOCK(&peerl);
02767 }
02768 
02769 static void delete_aliases(void)
02770 {
02771    int pruned = 0;
02772 
02773    /* Delete all aliases */
02774    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02775    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02776       ASTOBJ_RDLOCK(iterator);
02777       ASTOBJ_MARK(iterator);
02778       ++pruned;
02779       ASTOBJ_UNLOCK(iterator);
02780    } while (0) );
02781    if (pruned) {
02782       ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
02783    }
02784    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02785 }
02786 
02787 static void prune_peers(void)
02788 {
02789    /* Prune peers who still are supposed to be deleted */
02790    ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
02791 }
02792 
02793 static int reload_config(int is_reload)
02794 {
02795    int format;
02796    struct ast_config *cfg, *ucfg;
02797    struct ast_variable *v;
02798    struct oh323_peer *peer = NULL;
02799    struct oh323_user *user = NULL;
02800    struct oh323_alias *alias = NULL;
02801    struct ast_hostent ahp; struct hostent *hp;
02802    char *cat;
02803    const char *utype;
02804    int is_user, is_peer, is_alias;
02805    char _gatekeeper[100];
02806    int gk_discover, gk_disable, gk_changed;
02807 
02808    cfg = ast_config_load(config);
02809 
02810    /* We *must* have a config file otherwise stop immediately */
02811    if (!cfg) {
02812       ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
02813       return 1;
02814    }
02815 
02816    if (is_reload) {
02817       delete_users();
02818       delete_aliases();
02819       prune_peers();
02820    }
02821 
02822    /* fire up the H.323 Endpoint */
02823    if (!h323_end_point_exist()) {
02824       h323_end_point_create();
02825    }
02826    ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
02827    gk_discover = gatekeeper_discover;
02828    gk_disable = gatekeeper_disable;
02829    memset(&bindaddr, 0, sizeof(bindaddr));
02830    memset(&global_options, 0, sizeof(global_options));
02831    global_options.fastStart = 1;
02832    global_options.h245Tunneling = 1;
02833    global_options.dtmfcodec = 101;
02834    global_options.dtmfmode = H323_DTMF_RFC2833;
02835    global_options.capability = GLOBAL_CAPABILITY;
02836    global_options.bridge = 1;    /* Do native bridging by default */
02837    global_options.autoframing = 0;
02838    strcpy(default_context, "default");
02839    h323_signalling_port = 1720;
02840    gatekeeper_disable = 1;
02841    gatekeeper_discover = 0;
02842    gkroute = 0;
02843    userbyalias = 1;
02844    acceptAnonymous = 1;
02845    tos = 0;
02846 
02847    /* Copy the default jb config over global_jbconf */
02848    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
02849 
02850    /* Load configuration from users.conf */
02851    ucfg = ast_config_load("users.conf");
02852    if (ucfg) {
02853       struct ast_variable *gen;
02854       int genhas_h323;
02855       const char *has_h323;
02856 
02857       genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
02858       gen = ast_variable_browse(ucfg, "general");
02859       for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
02860          if (strcasecmp(cat, "general")) {
02861             has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
02862             if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
02863                user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
02864                if (user) {
02865                   ASTOBJ_CONTAINER_LINK(&userl, user);
02866                   ASTOBJ_UNREF(user, oh323_destroy_user);
02867                }
02868                peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0);
02869                if (peer) {
02870                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02871                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02872                }
02873             }
02874          }
02875       }
02876       ast_config_destroy(ucfg);
02877    }
02878 
02879    for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
02880       /* handle jb conf */
02881       if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
02882          continue;
02883       /* Create the interface list */
02884       if (!strcasecmp(v->name, "port")) {
02885          h323_signalling_port = (int)strtol(v->value, NULL, 10);
02886       } else if (!strcasecmp(v->name, "bindaddr")) {
02887          if (!(hp = ast_gethostbyname(v->value, &ahp))) {
02888             ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
02889          } else {
02890             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
02891          }
02892       } else if (!strcasecmp(v->name, "tos")) {
02893          if (sscanf(v->value, "%30d", &format)) {
02894             tos = format & 0xff;
02895          } else if (!strcasecmp(v->value, "lowdelay")) {
02896             tos = IPTOS_LOWDELAY;
02897          } else if (!strcasecmp(v->value, "throughput")) {
02898             tos = IPTOS_THROUGHPUT;
02899          } else if (!strcasecmp(v->value, "reliability")) {
02900             tos = IPTOS_RELIABILITY;
02901          } else if (!strcasecmp(v->value, "mincost")) {
02902             tos = IPTOS_MINCOST;
02903          } else if (!strcasecmp(v->value, "none")) {
02904             tos = 0;
02905          } else {
02906             ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
02907          }
02908       } else if (!strcasecmp(v->name, "gatekeeper")) {
02909          if (!strcasecmp(v->value, "DISABLE")) {
02910             gatekeeper_disable = 1;
02911          } else if (!strcasecmp(v->value, "DISCOVER")) {
02912             gatekeeper_disable = 0;
02913             gatekeeper_discover = 1;
02914          } else {
02915             gatekeeper_disable = 0;
02916             ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper));
02917          }
02918       } else if (!strcasecmp(v->name, "secret")) {
02919          ast_copy_string(secret, v->value, sizeof(secret));
02920       } else if (!strcasecmp(v->name, "AllowGKRouted")) {
02921          gkroute = ast_true(v->value);
02922       } else if (!strcasecmp(v->name, "context")) {
02923          ast_copy_string(default_context, v->value, sizeof(default_context));
02924          ast_verbose(VERBOSE_PREFIX_2 "Setting default context to %s\n", default_context);
02925       } else if (!strcasecmp(v->name, "UserByAlias")) {
02926          userbyalias = ast_true(v->value);
02927       } else if (!strcasecmp(v->name, "AcceptAnonymous")) {
02928          acceptAnonymous = ast_true(v->value);
02929       } else if (!update_common_options(v, &global_options)) {
02930          /* dummy */
02931       }
02932    }
02933 
02934    for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
02935       if (strcasecmp(cat, "general")) {
02936          utype = ast_variable_retrieve(cfg, cat, "type");
02937          if (utype) {
02938             is_user = is_peer = is_alias = 0;
02939             if (!strcasecmp(utype, "user"))
02940                is_user = 1;
02941             else if (!strcasecmp(utype, "peer"))
02942                is_peer = 1;
02943             else if (!strcasecmp(utype, "friend"))
02944                is_user = is_peer = 1;
02945             else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias"))
02946                is_alias = 1;
02947             else {
02948                ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
02949                continue;
02950             }
02951             if (is_user) {
02952                user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0);
02953                if (user) {
02954                   ASTOBJ_CONTAINER_LINK(&userl, user);
02955                   ASTOBJ_UNREF(user, oh323_destroy_user);
02956                }
02957             }
02958             if (is_peer) {
02959                peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0);
02960                if (peer) {
02961                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02962                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02963                }
02964             }
02965             if (is_alias) {
02966                alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0);
02967                if (alias) {
02968                   ASTOBJ_CONTAINER_LINK(&aliasl, alias);
02969                   ASTOBJ_UNREF(alias, oh323_destroy_alias);
02970                }
02971             }
02972          } else {
02973             ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
02974          }
02975       }
02976    }
02977    ast_config_destroy(cfg);
02978 
02979    /* Register our H.323 aliases if any*/
02980    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02981    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02982       ASTOBJ_RDLOCK(iterator);
02983       if (h323_set_alias(iterator)) {
02984          ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
02985          ASTOBJ_UNLOCK(iterator);
02986          continue;
02987       }
02988       ASTOBJ_UNLOCK(iterator);
02989    } while (0) );
02990    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02991 
02992    /* Don't touch GK if nothing changed because URQ will drop all existing calls */
02993    gk_changed = 0;
02994    if (gatekeeper_disable != gk_disable)
02995       gk_changed = is_reload;
02996    else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover))
02997       gk_changed = is_reload;
02998    else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0))
02999       gk_changed = is_reload;
03000    if (gk_changed) {
03001       if(!gk_disable)
03002          h323_gk_urq();
03003       if (!gatekeeper_disable) {
03004          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
03005             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
03006             gatekeeper_disable = 1;
03007          }
03008       }
03009    }
03010    return 0;
03011 }
03012 
03013 static int h323_reload(int fd, int argc, char *argv[])
03014 {
03015    ast_mutex_lock(&h323_reload_lock);
03016    if (h323_reloading) {
03017       ast_verbose("Previous H.323 reload not yet done\n");
03018    } else {
03019       h323_reloading = 1;
03020    }
03021    ast_mutex_unlock(&h323_reload_lock);
03022    restart_monitor();
03023    return 0;
03024 }
03025 
03026 static int h323_do_reload(void)
03027 {
03028    reload_config(1);
03029    return 0;
03030 }
03031 
03032 static int reload(void)
03033 {
03034    if (!sched || !io) {
03035       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03036       return 0;
03037    }
03038    return h323_reload(0, 0, NULL);
03039 }
03040 
03041 static struct ast_cli_entry cli_h323_reload =
03042    { { "h.323", "reload", NULL },
03043    h323_reload, "Reload H.323 configuration",
03044    h323_reload_usage
03045 };
03046 
03047 static enum ast_rtp_get_result oh323_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03048 {
03049    struct oh323_pvt *pvt;
03050    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
03051 
03052    if (!(pvt = (struct oh323_pvt *)chan->tech_pvt))
03053       return res;
03054 
03055    ast_mutex_lock(&pvt->lock);
03056    if (pvt->rtp && pvt->options.bridge) {
03057       *rtp = pvt->rtp;
03058       res = AST_RTP_TRY_NATIVE;
03059    }
03060    ast_mutex_unlock(&pvt->lock);
03061 
03062    return res;
03063 }
03064 
03065 static enum ast_rtp_get_result oh323_get_vrtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03066 {
03067    return AST_RTP_GET_FAILED;
03068 }
03069 
03070 static char *convertcap(int cap)
03071 {
03072    switch (cap) {
03073    case AST_FORMAT_G723_1:
03074       return "G.723";
03075    case AST_FORMAT_GSM:
03076       return "GSM";
03077    case AST_FORMAT_ULAW:
03078       return "ULAW";
03079    case AST_FORMAT_ALAW:
03080       return "ALAW";
03081    case AST_FORMAT_G722:
03082       return "G.722";
03083    case AST_FORMAT_ADPCM:
03084       return "G.728";
03085    case AST_FORMAT_G729A:
03086       return "G.729";
03087    case AST_FORMAT_SPEEX:
03088       return "SPEEX";
03089    case AST_FORMAT_ILBC:
03090       return "ILBC";
03091    default:
03092       ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
03093       return NULL;
03094    }
03095 }
03096 
03097 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
03098 {
03099    /* XXX Deal with Video */
03100    struct oh323_pvt *pvt;
03101    struct sockaddr_in them;
03102    struct sockaddr_in us;
03103    char *mode;
03104 
03105    if (!rtp) {
03106       return 0;
03107    }
03108 
03109    mode = convertcap(chan->writeformat);
03110    pvt = (struct oh323_pvt *) chan->tech_pvt;
03111    if (!pvt) {
03112       ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
03113       return -1;
03114    }
03115    ast_rtp_get_peer(rtp, &them);
03116    ast_rtp_get_us(rtp, &us);
03117 #if 0 /* Native bridge still isn't ready */
03118    h323_native_bridge(pvt->cd.call_token, ast_inet_ntoa(them.sin_addr), mode);
03119 #endif
03120    return 0;
03121 }
03122 
03123 static struct ast_rtp_protocol oh323_rtp = {
03124    .type = "H323",
03125    .get_rtp_info = oh323_get_rtp_peer,
03126    .get_vrtp_info = oh323_get_vrtp_peer,
03127    .set_rtp_peer = oh323_set_rtp_peer,
03128 };
03129 
03130 static enum ast_module_load_result load_module(void)
03131 {
03132    int res;
03133 
03134    h323debug = 0;
03135    sched = sched_context_create();
03136    if (!sched) {
03137       ast_log(LOG_WARNING, "Unable to create schedule context\n");
03138       return AST_MODULE_LOAD_FAILURE;
03139    }
03140    io = io_context_create();
03141    if (!io) {
03142       ast_log(LOG_WARNING, "Unable to create I/O context\n");
03143       return AST_MODULE_LOAD_FAILURE;
03144    }
03145    ast_cli_register(&cli_h323_reload);
03146    ASTOBJ_CONTAINER_INIT(&userl);
03147    ASTOBJ_CONTAINER_INIT(&peerl);
03148    ASTOBJ_CONTAINER_INIT(&aliasl);
03149    res = reload_config(0);
03150    if (res) {
03151       /* No config entry */
03152       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03153       ast_cli_unregister(&cli_h323_reload);
03154       io_context_destroy(io);
03155       io = NULL;
03156       sched_context_destroy(sched);
03157       sched = NULL;
03158       ASTOBJ_CONTAINER_DESTROY(&userl);
03159       ASTOBJ_CONTAINER_DESTROY(&peerl);
03160       ASTOBJ_CONTAINER_DESTROY(&aliasl);
03161       return AST_MODULE_LOAD_DECLINE;
03162    } else {
03163       /* Make sure we can register our channel type */
03164       if (ast_channel_register(&oh323_tech)) {
03165          ast_log(LOG_ERROR, "Unable to register channel class 'H323'\n");
03166          ast_cli_unregister(&cli_h323_reload);
03167          h323_end_process();
03168          io_context_destroy(io);
03169          sched_context_destroy(sched);
03170 
03171          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03172          ASTOBJ_CONTAINER_DESTROY(&userl);
03173          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03174          ASTOBJ_CONTAINER_DESTROY(&peerl);
03175          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03176          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03177 
03178          return AST_MODULE_LOAD_FAILURE;
03179       }
03180       ast_cli_register_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03181 
03182       ast_rtp_proto_register(&oh323_rtp);
03183 
03184       /* Register our callback functions */
03185       h323_callback_register(setup_incoming_call,
03186                   setup_outgoing_call,
03187                   external_rtp_create,
03188                   setup_rtp_connection,
03189                   cleanup_connection,
03190                   chan_ringing,
03191                   connection_made,
03192                   receive_digit,
03193                   answer_call,
03194                   progress,
03195                   set_dtmf_payload,
03196                   hangup_connection,
03197                   set_local_capabilities,
03198                   set_peer_capabilities);
03199       /* start the h.323 listener */
03200       if (h323_start_listener(h323_signalling_port, bindaddr)) {
03201          ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
03202          ast_rtp_proto_unregister(&oh323_rtp);
03203          ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03204          ast_cli_unregister(&cli_h323_reload);
03205          h323_end_process();
03206          io_context_destroy(io);
03207          sched_context_destroy(sched);
03208 
03209          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03210          ASTOBJ_CONTAINER_DESTROY(&userl);
03211          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03212          ASTOBJ_CONTAINER_DESTROY(&peerl);
03213          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03214          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03215 
03216          return AST_MODULE_LOAD_FAILURE;
03217       }
03218       /* Possibly register with a GK */
03219       if (!gatekeeper_disable) {
03220          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
03221             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
03222             gatekeeper_disable = 1;
03223             res = AST_MODULE_LOAD_SUCCESS;
03224          }
03225       }
03226       /* And start the monitor for the first time */
03227       restart_monitor();
03228    }
03229    return res;
03230 }
03231 
03232 static int unload_module(void)
03233 {
03234    struct oh323_pvt *p, *pl;
03235 
03236    /* unregister commands */
03237    ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03238    ast_cli_unregister(&cli_h323_reload);
03239 
03240    ast_channel_unregister(&oh323_tech);
03241    ast_rtp_proto_unregister(&oh323_rtp);
03242 
03243    if (!ast_mutex_lock(&iflock)) {
03244       /* hangup all interfaces if they have an owner */
03245       p = iflist;
03246       while(p) {
03247          if (p->owner) {
03248             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
03249          }
03250          p = p->next;
03251       }
03252       iflist = NULL;
03253       ast_mutex_unlock(&iflock);
03254    } else {
03255       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03256       return -1;
03257    }
03258    if (!ast_mutex_lock(&monlock)) {
03259       if ((monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
03260          if (monitor_thread != pthread_self()) {
03261             pthread_cancel(monitor_thread);
03262          }
03263          pthread_kill(monitor_thread, SIGURG);
03264          pthread_join(monitor_thread, NULL);
03265       }
03266       monitor_thread = AST_PTHREADT_STOP;
03267       ast_mutex_unlock(&monlock);
03268    } else {
03269       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
03270       return -1;
03271    }
03272    if (!ast_mutex_lock(&iflock)) {
03273       /* destroy all the interfaces and free their memory */
03274       p = iflist;
03275       while(p) {
03276          pl = p;
03277          p = p->next;
03278          /* free associated memory */
03279          ast_mutex_destroy(&pl->lock);
03280          free(pl);
03281       }
03282       iflist = NULL;
03283       ast_mutex_unlock(&iflock);
03284    } else {
03285       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03286       return -1;
03287    }
03288    if (!gatekeeper_disable)
03289       h323_gk_urq();
03290    h323_end_process();
03291    if (io)
03292       io_context_destroy(io);
03293    if (sched)
03294       sched_context_destroy(sched);
03295 
03296    ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03297    ASTOBJ_CONTAINER_DESTROY(&userl);
03298    ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03299    ASTOBJ_CONTAINER_DESTROY(&peerl);
03300    ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03301    ASTOBJ_CONTAINER_DESTROY(&aliasl);
03302 
03303    return 0;
03304 }
03305 
03306 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "The NuFone Network's OpenH323 Channel Driver",
03307       .load = load_module,
03308       .unload = unload_module,
03309       .reload = reload,
03310 );

Generated on Tue Apr 6 15:45:28 2010 for Asterisk - the Open Source PBX by  doxygen 1.4.7