Fri Apr 24 16:25:52 2009

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: 154263 $")
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 #include "h323/chan_h323.h"
00106 
00107 receive_digit_cb on_receive_digit;
00108 on_rtp_cb on_external_rtp_create;
00109 start_rtp_cb on_start_rtp_channel;
00110 setup_incoming_cb on_incoming_call;
00111 setup_outbound_cb on_outgoing_call;
00112 chan_ringing_cb   on_chan_ringing;
00113 con_established_cb on_connection_established;
00114 clear_con_cb on_connection_cleared;
00115 answer_call_cb on_answer_call;
00116 progress_cb on_progress;
00117 rfc2833_cb on_set_rfc2833_payload;
00118 hangup_cb on_hangup;
00119 setcapabilities_cb on_setcapabilities;
00120 setpeercapabilities_cb on_setpeercapabilities;
00121 
00122 /* global debug flag */
00123 int h323debug;
00124 
00125 /*! Global jitterbuffer configuration - by default, jb is disabled */
00126 static struct ast_jb_conf default_jbconf =
00127 {
00128    .flags = 0,
00129    .max_size = -1,
00130    .resync_threshold = -1,
00131    .impl = ""
00132 };
00133 static struct ast_jb_conf global_jbconf;
00134 
00135 /** Variables required by Asterisk */
00136 static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver";
00137 static const char config[] = "h323.conf";
00138 static char default_context[AST_MAX_CONTEXT] = "default";
00139 static struct sockaddr_in bindaddr;
00140 
00141 #define GLOBAL_CAPABILITY (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_H261)
00142 
00143 /** H.323 configuration values */
00144 static int h323_signalling_port = 1720;
00145 static char gatekeeper[100];
00146 static int gatekeeper_disable = 1;
00147 static int gatekeeper_discover = 0;
00148 static int gkroute = 0;
00149 /* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
00150 static int userbyalias = 1;
00151 static int acceptAnonymous = 1;
00152 static int tos = 0;
00153 static char secret[50];
00154 static unsigned int unique = 0;
00155 
00156 static call_options_t global_options;
00157 
00158 /** Private structure of a OpenH323 channel */
00159 struct oh323_pvt {
00160    ast_mutex_t lock;             /* Channel private lock */
00161    call_options_t options;          /* Options to be used during call setup */
00162    int alreadygone;              /* Whether or not we've already been destroyed by our peer */
00163    int needdestroy;              /* if we need to be destroyed */
00164    call_details_t cd;               /* Call details */
00165    struct ast_channel *owner;       /* Who owns us */
00166    struct sockaddr_in sa;           /* Our peer */
00167    struct sockaddr_in redirip;         /* Where our RTP should be going if not to us */
00168    int nonCodecCapability;          /* non-audio capability */
00169    int outgoing;                 /* Outgoing or incoming call? */
00170    char exten[AST_MAX_EXTENSION];      /* Requested extension */
00171    char context[AST_MAX_CONTEXT];      /* Context where to start */
00172    char accountcode[256];           /* Account code */
00173    char rdnis[80];                  /* Referring DNIS, if available */
00174    int amaflags;                 /* AMA Flags */
00175    struct ast_rtp *rtp;          /* RTP Session */
00176    struct ast_dsp *vad;          /* Used for in-band DTMF detection */
00177    int nativeformats;               /* Codec formats supported by a channel */
00178    int needhangup;                  /* Send hangup when Asterisk is ready */
00179    int hangupcause;              /* Hangup cause from OpenH323 layer */
00180    int newstate;                 /* Pending state change */
00181    int newcontrol;                  /* Pending control to send */
00182    int newdigit;                 /* Pending DTMF digit to send */
00183    int newduration;              /* Pending DTMF digit duration to send */
00184    int pref_codec;                  /* Preferred codec */
00185    int peercapability;              /* Capabilities learned from peer */
00186    int jointcapability;          /* Common capabilities for local and remote side */
00187    struct ast_codec_pref peer_prefs;   /* Preferenced list of codecs which remote side supports */
00188    int dtmf_pt;                  /* Payload code used for RFC2833 messages */
00189    int curDTMF;                  /* DTMF tone being generated to Asterisk side */
00190    int DTMFsched;                /* Scheduler descriptor for DTMF */
00191    int update_rtp_info;          /* Configuration of fd's array is pending */
00192    int recvonly;                 /* Peer isn't wish to receive our voice stream */
00193    int txDtmfDigit;              /* DTMF digit being to send to H.323 side */
00194    int noInbandDtmf;             /* Inband DTMF processing by DSP isn't available */
00195    int connection_established;         /* Call got CONNECT message */
00196    int got_progress;             /* Call got PROGRESS message, pass inband audio */
00197    struct oh323_pvt *next;          /* Next channel in list */
00198 } *iflist = NULL;
00199 
00200 static struct ast_user_list {
00201    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user);
00202 } userl;
00203 
00204 static struct ast_peer_list {
00205    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer);
00206 } peerl;
00207 
00208 static struct ast_alias_list {
00209    ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias);
00210 } aliasl;
00211 
00212 /** Asterisk RTP stuff */
00213 static struct sched_context *sched;
00214 static struct io_context *io;
00215 
00216 /** Protect the interface list (oh323_pvt) */
00217 AST_MUTEX_DEFINE_STATIC(iflock);
00218 
00219 /* Protect the monitoring thread, so only one process can kill or start it, and not
00220    when it's doing something critical. */
00221 AST_MUTEX_DEFINE_STATIC(monlock);
00222 
00223 /* Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
00224 AST_MUTEX_DEFINE_STATIC(caplock);
00225 
00226 /* Protect the reload process */
00227 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
00228 static int h323_reloading = 0;
00229 
00230 /* This is the thread for the monitor which checks for input on the channels
00231    which are not currently in use. */
00232 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00233 static int restart_monitor(void);
00234 static int h323_do_reload(void);
00235 
00236 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause);
00237 static int oh323_digit_begin(struct ast_channel *c, char digit);
00238 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration);
00239 static int oh323_call(struct ast_channel *c, char *dest, int timeout);
00240 static int oh323_hangup(struct ast_channel *c);
00241 static int oh323_answer(struct ast_channel *c);
00242 static struct ast_frame *oh323_read(struct ast_channel *c);
00243 static int oh323_write(struct ast_channel *c, struct ast_frame *frame);
00244 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen);
00245 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00246 
00247 static const struct ast_channel_tech oh323_tech = {
00248    .type = "H323",
00249    .description = tdesc,
00250    .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
00251    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
00252    .requester = oh323_request,
00253    .send_digit_begin = oh323_digit_begin,
00254    .send_digit_end = oh323_digit_end,
00255    .call = oh323_call,
00256    .hangup = oh323_hangup,
00257    .answer = oh323_answer,
00258    .read = oh323_read,
00259    .write = oh323_write,
00260    .indicate = oh323_indicate,
00261    .fixup = oh323_fixup,
00262    /* disable, for now */
00263 #if 0
00264    .bridge = ast_rtp_bridge,
00265 #endif
00266 };
00267 
00268 static const char* redirectingreason2str(int redirectingreason)
00269 {
00270    switch (redirectingreason) {
00271    case 0:
00272       return "UNKNOWN";
00273    case 1:
00274       return "BUSY";
00275    case 2:
00276       return "NO_REPLY";
00277    case 0xF:
00278       return "UNCONDITIONAL";
00279    default:
00280       return "NOREDIRECT";
00281    }
00282 }
00283 
00284 static void oh323_destroy_alias(struct oh323_alias *alias)
00285 {
00286    if (h323debug)
00287       ast_log(LOG_DEBUG, "Destroying alias '%s'\n", alias->name);
00288    free(alias);
00289 }
00290 
00291 static void oh323_destroy_user(struct oh323_user *user)
00292 {
00293    if (h323debug)
00294       ast_log(LOG_DEBUG, "Destroying user '%s'\n", user->name);
00295    ast_free_ha(user->ha);
00296    free(user);
00297 }
00298 
00299 static void oh323_destroy_peer(struct oh323_peer *peer)
00300 {
00301    if (h323debug)
00302       ast_log(LOG_DEBUG, "Destroying peer '%s'\n", peer->name);
00303    ast_free_ha(peer->ha);
00304    free(peer);
00305 }
00306 
00307 static int oh323_simulate_dtmf_end(const void *data)
00308 {
00309    struct oh323_pvt *pvt = (struct oh323_pvt *)data;
00310 
00311    if (pvt) {
00312       ast_mutex_lock(&pvt->lock);
00313       /* Don't hold pvt lock while trying to lock the channel */
00314       while(pvt->owner && ast_channel_trylock(pvt->owner)) {
00315          ast_mutex_unlock(&pvt->lock);
00316          usleep(1);
00317          ast_mutex_lock(&pvt->lock);
00318       }
00319 
00320       if (pvt->owner) {
00321          struct ast_frame f = {
00322             .frametype = AST_FRAME_DTMF_END,
00323             .subclass = pvt->curDTMF,
00324             .samples = 0,
00325             .src = "SIMULATE_DTMF_END",
00326          };
00327          ast_queue_frame(pvt->owner, &f);
00328          ast_channel_unlock(pvt->owner);
00329       }
00330 
00331       pvt->DTMFsched = -1;
00332       ast_mutex_unlock(&pvt->lock);
00333    }
00334 
00335    return 0;
00336 }
00337 
00338 /* Channel and private structures should be already locked */
00339 static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt)
00340 {
00341    if (c->nativeformats != pvt->nativeformats) {
00342       if (h323debug)
00343          ast_log(LOG_DEBUG, "Preparing %s for new native format\n", c->name);
00344       c->nativeformats = pvt->nativeformats;
00345       ast_set_read_format(c, c->readformat);
00346       ast_set_write_format(c, c->writeformat);
00347    }
00348    if (pvt->needhangup) {
00349       if (h323debug)
00350          ast_log(LOG_DEBUG, "Process pending hangup for %s\n", c->name);
00351       c->_softhangup |= AST_SOFTHANGUP_DEV;
00352       c->hangupcause = pvt->hangupcause;
00353       ast_queue_hangup(c);
00354       pvt->needhangup = 0;
00355       pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
00356    }
00357    if (pvt->newstate >= 0) {
00358       ast_setstate(c, pvt->newstate);
00359       pvt->newstate = -1;
00360    }
00361    if (pvt->newcontrol >= 0) {
00362       ast_queue_control(c, pvt->newcontrol);
00363       pvt->newcontrol = -1;
00364    }
00365    if (pvt->newdigit >= 0) {
00366       struct ast_frame f = {
00367          .frametype = AST_FRAME_DTMF_END,
00368          .subclass = pvt->newdigit,
00369          .samples = pvt->newduration * 8,
00370          .len = pvt->newduration,
00371          .src = "UPDATE_INFO",
00372       };
00373       if (pvt->newdigit == ' ') {      /* signalUpdate message */
00374          f.subclass = pvt->curDTMF;
00375          if (pvt->DTMFsched >= 0) {
00376             AST_SCHED_DEL(sched, pvt->DTMFsched);
00377          }
00378       } else {                /* Regular input or signal message */
00379          if (pvt->newduration) {    /* This is a signal, signalUpdate follows */
00380             f.frametype = AST_FRAME_DTMF_BEGIN;
00381             AST_SCHED_DEL(sched, pvt->DTMFsched);
00382             pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
00383             if (h323debug)
00384                ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
00385          }
00386          pvt->curDTMF = pvt->newdigit;
00387       }
00388       ast_queue_frame(c, &f);
00389       pvt->newdigit = -1;
00390    }
00391    if (pvt->update_rtp_info > 0) {
00392       if (pvt->rtp) {
00393          ast_jb_configure(c, &global_jbconf);
00394          c->fds[0] = ast_rtp_fd(pvt->rtp);
00395          c->fds[1] = ast_rtcp_fd(pvt->rtp);
00396          ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00397       }
00398       pvt->update_rtp_info = -1;
00399    }
00400 }
00401 
00402 /* Only channel structure should be locked */
00403 static void oh323_update_info(struct ast_channel *c)
00404 {
00405    struct oh323_pvt *pvt = c->tech_pvt;
00406 
00407    if (pvt) {
00408       ast_mutex_lock(&pvt->lock);
00409       __oh323_update_info(c, pvt);
00410       ast_mutex_unlock(&pvt->lock);
00411    }
00412 }
00413 
00414 static void cleanup_call_details(call_details_t *cd)
00415 {
00416    if (cd->call_token) {
00417       free(cd->call_token);
00418       cd->call_token = NULL;
00419    }
00420    if (cd->call_source_aliases) {
00421       free(cd->call_source_aliases);
00422       cd->call_source_aliases = NULL;
00423    }
00424    if (cd->call_dest_alias) {
00425       free(cd->call_dest_alias);
00426       cd->call_dest_alias = NULL;
00427    }
00428    if (cd->call_source_name) {
00429       free(cd->call_source_name);
00430       cd->call_source_name = NULL;
00431    }
00432    if (cd->call_source_e164) {
00433       free(cd->call_source_e164);
00434       cd->call_source_e164 = NULL;
00435    }
00436    if (cd->call_dest_e164) {
00437       free(cd->call_dest_e164);
00438       cd->call_dest_e164 = NULL;
00439    }
00440    if (cd->sourceIp) {
00441       free(cd->sourceIp);
00442       cd->sourceIp = NULL;
00443    }
00444    if (cd->redirect_number) {
00445       free(cd->redirect_number);
00446       cd->redirect_number = NULL;
00447    }
00448 }
00449 
00450 static void __oh323_destroy(struct oh323_pvt *pvt)
00451 {
00452    struct oh323_pvt *cur, *prev = NULL;
00453 
00454    AST_SCHED_DEL(sched, pvt->DTMFsched);
00455 
00456    if (pvt->rtp) {
00457       ast_rtp_destroy(pvt->rtp);
00458    }
00459 
00460    /* Free dsp used for in-band DTMF detection */
00461    if (pvt->vad) {
00462       ast_dsp_free(pvt->vad);
00463    }
00464    cleanup_call_details(&pvt->cd);
00465 
00466    /* Unlink us from the owner if we have one */
00467    if (pvt->owner) {
00468       ast_channel_lock(pvt->owner);
00469       if (h323debug)
00470          ast_log(LOG_DEBUG, "Detaching from %s\n", pvt->owner->name);
00471       pvt->owner->tech_pvt = NULL;
00472       ast_channel_unlock(pvt->owner);
00473    }
00474    cur = iflist;
00475    while(cur) {
00476       if (cur == pvt) {
00477          if (prev)
00478             prev->next = cur->next;
00479          else
00480             iflist = cur->next;
00481          break;
00482       }
00483       prev = cur;
00484       cur = cur->next;
00485    }
00486    if (!cur) {
00487       ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
00488    } else {
00489       ast_mutex_unlock(&pvt->lock);
00490       ast_mutex_destroy(&pvt->lock);
00491       free(pvt);
00492    }
00493 }
00494 
00495 static void oh323_destroy(struct oh323_pvt *pvt)
00496 {
00497    if (h323debug) {
00498       ast_log(LOG_DEBUG, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>"));
00499    }
00500    ast_mutex_lock(&iflock);
00501    ast_mutex_lock(&pvt->lock);
00502    __oh323_destroy(pvt);
00503    ast_mutex_unlock(&iflock);
00504 }
00505 
00506 static int oh323_digit_begin(struct ast_channel *c, char digit)
00507 {
00508    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00509    char *token;
00510 
00511    if (!pvt) {
00512       ast_log(LOG_ERROR, "No private structure?! This is bad\n");
00513       return -1;
00514    }
00515    ast_mutex_lock(&pvt->lock);
00516    if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && (pvt->dtmf_pt > 0)) {
00517       /* out-of-band DTMF */
00518       if (h323debug) {
00519          ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name);
00520       }
00521       ast_rtp_senddigit_begin(pvt->rtp, digit);
00522       ast_mutex_unlock(&pvt->lock);
00523    } else if (pvt->txDtmfDigit != digit) {
00524       /* in-band DTMF */
00525       if (h323debug) {
00526          ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name);
00527       }
00528       pvt->txDtmfDigit = digit;
00529       token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00530       ast_mutex_unlock(&pvt->lock);
00531       h323_send_tone(token, digit);
00532       if (token) {
00533          free(token);
00534       }
00535    } else
00536       ast_mutex_unlock(&pvt->lock);
00537    oh323_update_info(c);
00538    return 0;
00539 }
00540 
00541 /**
00542  * Send (play) the specified digit to the channel.
00543  *
00544  */
00545 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration)
00546 {
00547    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00548    char *token;
00549 
00550    if (!pvt) {
00551       ast_log(LOG_ERROR, "No private structure?! This is bad\n");
00552       return -1;
00553    }
00554    ast_mutex_lock(&pvt->lock);
00555    if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && (pvt->dtmf_pt > 0)) {
00556       /* out-of-band DTMF */
00557       if (h323debug) {
00558          ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s, duration %d\n", digit, c->name, duration);
00559       }
00560       ast_rtp_senddigit_end(pvt->rtp, digit);
00561       ast_mutex_unlock(&pvt->lock);
00562    } else {
00563       /* in-band DTMF */
00564       if (h323debug) {
00565          ast_log(LOG_DTMF, "End sending inband digit %c on %s, duration %d\n", digit, c->name, duration);
00566       }
00567       pvt->txDtmfDigit = ' ';
00568       token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00569       ast_mutex_unlock(&pvt->lock);
00570       h323_send_tone(token, ' ');
00571       if (token) {
00572          free(token);
00573       }
00574    }
00575    oh323_update_info(c);
00576    return 0;
00577 }
00578 
00579 /**
00580  * Make a call over the specified channel to the specified
00581  * destination.
00582  * Returns -1 on error, 0 on success.
00583  */
00584 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
00585 {
00586    int res = 0;
00587    struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
00588    const char *addr;
00589    char called_addr[1024];
00590 
00591    if (h323debug) {
00592       ast_log(LOG_DEBUG, "Calling to %s on %s\n", dest, c->name);
00593    }
00594    if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
00595       ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
00596       return -1;
00597    }
00598    ast_mutex_lock(&pvt->lock);
00599    if (!gatekeeper_disable) {
00600       if (ast_strlen_zero(pvt->exten)) {
00601          ast_copy_string(called_addr, dest, sizeof(called_addr));
00602       } else {
00603          snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest);
00604       }
00605    } else {
00606       res = htons(pvt->sa.sin_port);
00607       addr = ast_inet_ntoa(pvt->sa.sin_addr);
00608       if (ast_strlen_zero(pvt->exten)) {
00609          snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res);
00610       } else {
00611          snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res);
00612       }
00613    }
00614    /* make sure null terminated */
00615    called_addr[sizeof(called_addr) - 1] = '\0';
00616 
00617    if (c->cid.cid_num)
00618       ast_copy_string(pvt->options.cid_num, c->cid.cid_num, sizeof(pvt->options.cid_num));
00619 
00620    if (c->cid.cid_name)
00621       ast_copy_string(pvt->options.cid_name, c->cid.cid_name, sizeof(pvt->options.cid_name));
00622 
00623    if (c->cid.cid_rdnis) {
00624       ast_copy_string(pvt->options.cid_rdnis, c->cid.cid_rdnis, sizeof(pvt->options.cid_rdnis));
00625    }
00626 
00627    pvt->options.presentation = c->cid.cid_pres;
00628    pvt->options.type_of_number = c->cid.cid_ton;
00629 
00630    if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) {
00631       if (!strcasecmp(addr, "UNKNOWN"))
00632          pvt->options.redirect_reason = 0;
00633       else if (!strcasecmp(addr, "BUSY"))
00634          pvt->options.redirect_reason = 1;
00635       else if (!strcasecmp(addr, "NO_REPLY"))
00636          pvt->options.redirect_reason = 2;
00637       else if (!strcasecmp(addr, "UNCONDITIONAL"))
00638          pvt->options.redirect_reason = 15;
00639       else
00640          pvt->options.redirect_reason = -1;
00641    } else
00642       pvt->options.redirect_reason = -1;
00643 
00644    pvt->options.transfer_capability = c->transfercapability;
00645 
00646    /* indicate that this is an outgoing call */
00647    pvt->outgoing = 1;
00648 
00649    if (option_verbose > 2)
00650       ast_verbose(VERBOSE_PREFIX_3 "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability));
00651    if (h323debug)
00652       ast_log(LOG_DEBUG, "Placing outgoing call to %s, %d\n", called_addr, pvt->options.dtmfcodec);
00653    ast_mutex_unlock(&pvt->lock);
00654    res = h323_make_call(called_addr, &(pvt->cd), &pvt->options);
00655    if (res) {
00656       ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
00657       return -1;
00658    }
00659    oh323_update_info(c);
00660    return 0;
00661 }
00662 
00663 static int oh323_answer(struct ast_channel *c)
00664 {
00665    int res;
00666    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00667    char *token;
00668 
00669    if (h323debug)
00670       ast_log(LOG_DEBUG, "Answering on %s\n", c->name);
00671 
00672    ast_mutex_lock(&pvt->lock);
00673    token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00674    ast_mutex_unlock(&pvt->lock);
00675    res = h323_answering_call(token, 0);
00676    if (token)
00677       free(token);
00678 
00679    oh323_update_info(c);
00680    if (c->_state != AST_STATE_UP) {
00681       ast_setstate(c, AST_STATE_UP);
00682    }
00683    return res;
00684 }
00685 
00686 static int oh323_hangup(struct ast_channel *c)
00687 {
00688    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00689    int q931cause = AST_CAUSE_NORMAL_CLEARING;
00690    char *call_token;
00691 
00692 
00693    if (h323debug)
00694       ast_log(LOG_DEBUG, "Hanging up and scheduling destroy of call %s\n", c->name);
00695 
00696    if (!c->tech_pvt) {
00697       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00698       return 0;
00699    }
00700    ast_mutex_lock(&pvt->lock);
00701    /* Determine how to disconnect */
00702    if (pvt->owner != c) {
00703       ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
00704       ast_mutex_unlock(&pvt->lock);
00705       return 0;
00706    }
00707 
00708    pvt->owner = NULL;
00709    c->tech_pvt = NULL;
00710 
00711    if (c->hangupcause) {
00712       q931cause = c->hangupcause;
00713    } else {
00714       const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS");
00715       if (cause) {
00716          if (!strcmp(cause, "CONGESTION")) {
00717             q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION;
00718          } else if (!strcmp(cause, "BUSY")) {
00719             q931cause = AST_CAUSE_USER_BUSY;
00720          } else if (!strcmp(cause, "CHANISUNVAIL")) {
00721             q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
00722          } else if (!strcmp(cause, "NOANSWER")) {
00723             q931cause = AST_CAUSE_NO_ANSWER;
00724          } else if (!strcmp(cause, "CANCEL")) {
00725             q931cause = AST_CAUSE_CALL_REJECTED;
00726          }
00727       }
00728    }
00729 
00730    /* Start the process if it's not already started */
00731    if (!pvt->alreadygone && !pvt->hangupcause) {
00732       call_token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
00733       if (call_token) {
00734          /* Release lock to eliminate deadlock */
00735          ast_mutex_unlock(&pvt->lock);
00736          if (h323_clear_call(call_token, q931cause)) {
00737             ast_log(LOG_WARNING, "ClearCall failed.\n");
00738          }
00739          free(call_token);
00740          ast_mutex_lock(&pvt->lock);
00741       }
00742    }
00743    pvt->needdestroy = 1;
00744    ast_mutex_unlock(&pvt->lock);
00745 
00746    /* Update usage counter */
00747    ast_module_unref(ast_module_info->self);
00748 
00749    return 0;
00750 }
00751 
00752 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
00753 {
00754    /* Retrieve audio/etc from channel. Assumes pvt->lock is already held. */
00755    struct ast_frame *f;
00756 
00757    /* Only apply it for the first packet, we just need the correct ip/port */
00758    if (pvt->options.nat) {
00759       ast_rtp_setnat(pvt->rtp, pvt->options.nat);
00760       pvt->options.nat = 0;
00761    }
00762 
00763    f = ast_rtp_read(pvt->rtp);
00764    /* Don't send RFC2833 if we're not supposed to */
00765    if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->options.dtmfmode & H323_DTMF_RFC2833)) {
00766       return &ast_null_frame;
00767    }
00768    if (pvt->owner) {
00769       /* We already hold the channel lock */
00770       if (f->frametype == AST_FRAME_VOICE) {
00771          if (f->subclass != pvt->owner->nativeformats) {
00772             /* Try to avoid deadlock */
00773             if (ast_channel_trylock(pvt->owner)) {
00774                ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n");
00775                return &ast_null_frame;
00776             }
00777             if (h323debug)
00778                ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
00779             pvt->owner->nativeformats = f->subclass;
00780             pvt->nativeformats = f->subclass;
00781             ast_set_read_format(pvt->owner, pvt->owner->readformat);
00782             ast_set_write_format(pvt->owner, pvt->owner->writeformat);
00783             ast_channel_unlock(pvt->owner);
00784          }
00785          /* Do in-band DTMF detection */
00786          if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) {
00787             if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) {
00788                if (!ast_channel_trylock(pvt->owner)) {
00789                   f = ast_dsp_process(pvt->owner, pvt->vad, f);
00790                   ast_channel_unlock(pvt->owner);
00791                }
00792                else
00793                   ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n");
00794             } else if (pvt->nativeformats && !pvt->noInbandDtmf) {
00795                ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(f->subclass));
00796                pvt->noInbandDtmf = 1;
00797             }
00798             if (f &&(f->frametype == AST_FRAME_DTMF)) {
00799                if (h323debug)
00800                   ast_log(LOG_DTMF, "Received in-band digit %c.\n", f->subclass);
00801             }
00802          }
00803       }
00804    }
00805    return f;
00806 }
00807 
00808 static struct ast_frame *oh323_read(struct ast_channel *c)
00809 {
00810    struct ast_frame *fr;
00811    struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
00812    ast_mutex_lock(&pvt->lock);
00813    __oh323_update_info(c, pvt);
00814    switch(c->fdno) {
00815    case 0:
00816       fr = oh323_rtp_read(pvt);
00817       break;
00818    case 1:
00819       if (pvt->rtp)
00820          fr = ast_rtcp_read(pvt->rtp);
00821       else
00822          fr = &ast_null_frame;
00823       break;
00824    default:
00825       ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name);
00826       fr = &ast_null_frame;
00827       break;
00828    }
00829    ast_mutex_unlock(&pvt->lock);
00830    return fr;
00831 }
00832 
00833 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
00834 {
00835    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00836    int res = 0;
00837    if (frame->frametype != AST_FRAME_VOICE) {
00838       if (frame->frametype == AST_FRAME_IMAGE) {
00839          return 0;
00840       } else {
00841          ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
00842          return 0;
00843       }
00844    } else {
00845       if (!(frame->subclass & c->nativeformats)) {
00846          ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
00847             frame->subclass, c->nativeformats, c->readformat, c->writeformat);
00848          return 0;
00849       }
00850    }
00851    if (pvt) {
00852       ast_mutex_lock(&pvt->lock);
00853       if (pvt->rtp && !pvt->recvonly)
00854          res = ast_rtp_write(pvt->rtp, frame);
00855       __oh323_update_info(c, pvt);
00856       ast_mutex_unlock(&pvt->lock);
00857    }
00858    return res;
00859 }
00860 
00861 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen)
00862 {
00863 
00864    struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
00865    char *token = (char *)NULL;
00866    int res = -1;
00867    int got_progress;
00868 
00869    ast_mutex_lock(&pvt->lock);
00870    token = (pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL);
00871    got_progress = pvt->got_progress;
00872    if (condition == AST_CONTROL_PROGRESS)
00873       pvt->got_progress = 1;
00874    else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION))
00875       pvt->alreadygone = 1;
00876    ast_mutex_unlock(&pvt->lock);
00877 
00878    if (h323debug)
00879       ast_log(LOG_DEBUG, "OH323: Indicating %d on %s\n", condition, token);
00880 
00881    switch(condition) {
00882    case AST_CONTROL_RINGING:
00883       if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
00884          h323_send_alerting(token);
00885          res = (got_progress ? 0 : -1);   /* Do not simulate any audio tones if we got PROGRESS message */
00886       }
00887       break;
00888    case AST_CONTROL_PROGRESS:
00889       if (c->_state != AST_STATE_UP) {
00890          /* Do not send PROGRESS message more than once */
00891          if (!got_progress)
00892             h323_send_progress(token);
00893          res = 0;
00894       }
00895       break;
00896    case AST_CONTROL_BUSY:
00897       if (c->_state != AST_STATE_UP) {
00898          h323_answering_call(token, 1);
00899          ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
00900          res = 0;
00901       }
00902       break;
00903    case AST_CONTROL_CONGESTION:
00904       if (c->_state != AST_STATE_UP) {
00905          h323_answering_call(token, 1);
00906          ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
00907          res = 0;
00908       }
00909       break;
00910    case AST_CONTROL_HOLD:
00911       ast_moh_start(c, data, NULL);
00912       res = 0;
00913       break;
00914    case AST_CONTROL_UNHOLD:
00915       ast_moh_stop(c);
00916       res = 0;
00917       break;
00918    case AST_CONTROL_SRCUPDATE:
00919       ast_rtp_new_source(pvt->rtp);
00920       res = 0;
00921       break;
00922    case AST_CONTROL_PROCEEDING:
00923    case -1:
00924       break;
00925    default:
00926       ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token);
00927       break;
00928    }
00929 
00930    if (h323debug)
00931       ast_log(LOG_DEBUG, "OH323: Indicated %d on %s, res=%d\n", condition, token, res);
00932    if (token)
00933       free(token);
00934    oh323_update_info(c);
00935 
00936    return res;
00937 }
00938 
00939 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
00940 {
00941    struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_pvt;
00942 
00943    ast_mutex_lock(&pvt->lock);
00944    if (pvt->owner != oldchan) {
00945       ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
00946       return -1;
00947    }
00948    pvt->owner = newchan;
00949    ast_mutex_unlock(&pvt->lock);
00950    return 0;
00951 }
00952 
00953 static int __oh323_rtp_create(struct oh323_pvt *pvt)
00954 {
00955    struct in_addr our_addr;
00956 
00957    if (pvt->rtp)
00958       return 0;
00959 
00960    if (ast_find_ourip(&our_addr, bindaddr)) {
00961       ast_mutex_unlock(&pvt->lock);
00962       ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
00963       return -1;
00964    }
00965    pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr);
00966    if (!pvt->rtp) {
00967       ast_mutex_unlock(&pvt->lock);
00968       ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
00969       return -1;
00970    }
00971    if (h323debug)
00972       ast_log(LOG_DEBUG, "Created RTP channel\n");
00973 
00974    ast_rtp_settos(pvt->rtp, tos);
00975 
00976    if (h323debug)
00977       ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->options.nat);
00978    ast_rtp_setnat(pvt->rtp, pvt->options.nat);
00979 
00980    if (pvt->dtmf_pt > 0)
00981       ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt, "audio", "telephone-event", 0);
00982 
00983    if (pvt->peercapability)
00984       ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
00985 
00986    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
00987       ast_jb_configure(pvt->owner, &global_jbconf);
00988       pvt->owner->fds[0] = ast_rtp_fd(pvt->rtp);
00989       pvt->owner->fds[1] = ast_rtcp_fd(pvt->rtp);
00990       ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
00991       ast_channel_unlock(pvt->owner);
00992    } else
00993       pvt->update_rtp_info = 1;
00994 
00995    return 0;
00996 }
00997 
00998 /* Private structure should be locked on a call */
00999 static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host)
01000 {
01001    struct ast_channel *ch;
01002    char *cid_num, *cid_name;
01003    int fmt;
01004 
01005    if (!ast_strlen_zero(pvt->options.cid_num))
01006       cid_num = pvt->options.cid_num;
01007    else
01008       cid_num = pvt->cd.call_source_e164;
01009 
01010    if (!ast_strlen_zero(pvt->options.cid_name))
01011       cid_name = pvt->options.cid_name;
01012    else
01013       cid_name = pvt->cd.call_source_name;
01014    
01015    /* Don't hold a oh323_pvt lock while we allocate a chanel */
01016    ast_mutex_unlock(&pvt->lock);
01017    ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, pvt->amaflags, "H323/%s", host);
01018    /* Update usage counter */
01019    ast_module_ref(ast_module_info->self);
01020    ast_mutex_lock(&pvt->lock);
01021    if (ch) {
01022       ch->tech = &oh323_tech;
01023       if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
01024          fmt = global_options.capability;
01025       ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
01026       pvt->nativeformats = ch->nativeformats;
01027       fmt = ast_best_codec(ch->nativeformats);
01028       ch->writeformat = fmt;
01029       ch->rawwriteformat = fmt;
01030       ch->readformat = fmt;
01031       ch->rawreadformat = fmt;
01032 #if 0
01033       ch->fds[0] = ast_rtp_fd(pvt->rtp);
01034       ch->fds[1] = ast_rtcp_fd(pvt->rtp);
01035 #endif
01036 #ifdef VIDEO_SUPPORT
01037       if (pvt->vrtp) {
01038          ch->fds[2] = ast_rtp_fd(pvt->vrtp);
01039          ch->fds[3] = ast_rtcp_fd(pvt->vrtp);
01040       }
01041 #endif
01042 #ifdef T38_SUPPORT
01043       if (pvt->udptl) {
01044          ch->fds[4] = ast_udptl_fd(pvt->udptl);
01045       }
01046 #endif
01047       if (state == AST_STATE_RING) {
01048          ch->rings = 1;
01049       }
01050       /* Allocate dsp for in-band DTMF support */
01051       if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
01052          pvt->vad = ast_dsp_new();
01053          ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
01054       }
01055       /* Register channel functions. */
01056       ch->tech_pvt = pvt;
01057       /* Set the owner of this channel */
01058       pvt->owner = ch;
01059 
01060       ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
01061       ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
01062       ch->priority = 1;
01063       if (!ast_strlen_zero(pvt->accountcode)) {
01064          ast_string_field_set(ch, accountcode, pvt->accountcode);
01065       }
01066       if (pvt->amaflags) {
01067          ch->amaflags = pvt->amaflags;
01068       }
01069 
01070       /* Don't use ast_set_callerid() here because it will
01071        * generate a needless NewCallerID event */
01072       ch->cid.cid_ani = ast_strdup(cid_num);
01073 
01074       if (pvt->cd.redirect_reason >= 0) {
01075          ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number);
01076          pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
01077       }
01078       ch->cid.cid_pres = pvt->cd.presentation;
01079       ch->cid.cid_ton = pvt->cd.type_of_number;
01080 
01081       if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
01082          ch->cid.cid_dnid = strdup(pvt->exten);
01083       }
01084       if (pvt->cd.transfer_capability >= 0)
01085          ch->transfercapability = pvt->cd.transfer_capability;
01086       if (state != AST_STATE_DOWN) {
01087          if (ast_pbx_start(ch)) {
01088             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
01089             ast_hangup(ch);
01090             ch = NULL;
01091          }
01092       }
01093    } else {
01094       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
01095    }
01096    return ch;
01097 }
01098 
01099 static struct oh323_pvt *oh323_alloc(int callid)
01100 {
01101    struct oh323_pvt *pvt;
01102 
01103    pvt = (struct oh323_pvt *) malloc(sizeof(struct oh323_pvt));
01104    if (!pvt) {
01105       ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
01106       return NULL;
01107    }
01108    memset(pvt, 0, sizeof(struct oh323_pvt));
01109    pvt->cd.redirect_reason = -1;
01110    pvt->cd.transfer_capability = -1;
01111    /* Ensure the call token is allocated for outgoing call */
01112    if (!callid) {
01113       if ((pvt->cd).call_token == NULL) {
01114          (pvt->cd).call_token = (char *)malloc(128);
01115       }
01116       if (!pvt->cd.call_token) {
01117          ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
01118          ast_rtp_destroy(pvt->rtp);
01119          free(pvt);
01120          return NULL;
01121       }
01122       memset((char *)(pvt->cd).call_token, 0, 128);
01123       pvt->cd.call_reference = callid;
01124    }
01125    memcpy(&pvt->options, &global_options, sizeof(pvt->options));
01126    pvt->jointcapability = pvt->options.capability;
01127    if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01128       pvt->nonCodecCapability |= AST_RTP_DTMF;
01129    } else {
01130       pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01131    }
01132    ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
01133    pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1;
01134    ast_mutex_init(&pvt->lock);
01135    /* Add to interface list */
01136    ast_mutex_lock(&iflock);
01137    pvt->next = iflist;
01138    iflist = pvt;
01139    ast_mutex_unlock(&iflock);
01140    return pvt;
01141 }
01142 
01143 static struct oh323_pvt *find_call_locked(int call_reference, const char *token)
01144 {
01145    struct oh323_pvt *pvt;
01146 
01147    ast_mutex_lock(&iflock);
01148    pvt = iflist;
01149    while(pvt) {
01150       if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) {
01151          /* Found the call */
01152          if ((token != NULL) && (pvt->cd.call_token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
01153             ast_mutex_lock(&pvt->lock);
01154             ast_mutex_unlock(&iflock);
01155             return pvt;
01156          } else if (token == NULL) {
01157             ast_log(LOG_WARNING, "Call Token is NULL\n");
01158             ast_mutex_lock(&pvt->lock);
01159             ast_mutex_unlock(&iflock);
01160             return pvt;
01161          }
01162       }
01163       pvt = pvt->next;
01164    }
01165    ast_mutex_unlock(&iflock);
01166    return NULL;
01167 }
01168 
01169 static int update_state(struct oh323_pvt *pvt, int state, int signal)
01170 {
01171    if (!pvt)
01172       return 0;
01173    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01174       if (state >= 0)
01175          ast_setstate(pvt->owner, state);
01176       if (signal >= 0)
01177          ast_queue_control(pvt->owner, signal);
01178       ast_channel_unlock(pvt->owner);
01179       return 1;
01180    }
01181    else {
01182       if (state >= 0)
01183          pvt->newstate = state;
01184       if (signal >= 0)
01185          pvt->newcontrol = signal;
01186       return 0;
01187    }
01188 }
01189 
01190 static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01191 {
01192    struct oh323_alias *alias;
01193    int found = 0;
01194 
01195    alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
01196 
01197    if (alias)
01198       found++;
01199    else {
01200       if (!(alias = (struct oh323_alias *)calloc(1, sizeof(*alias))))
01201          return NULL;
01202       ASTOBJ_INIT(alias);
01203    }
01204    if (!found && name)
01205       ast_copy_string(alias->name, name, sizeof(alias->name));
01206    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01207       if (!strcasecmp(v->name, "e164")) {
01208          ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
01209       } else if (!strcasecmp(v->name, "prefix")) {
01210          ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
01211       } else if (!strcasecmp(v->name, "context")) {
01212          ast_copy_string(alias->context, v->value, sizeof(alias->context));
01213       } else if (!strcasecmp(v->name, "secret")) {
01214          ast_copy_string(alias->secret, v->value, sizeof(alias->secret));
01215       } else {
01216          if (strcasecmp(v->value, "h323")) {
01217             ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name);
01218          }
01219       }
01220    }
01221    ASTOBJ_UNMARK(alias);
01222    return alias;
01223 }
01224 
01225 static struct oh323_alias *realtime_alias(const char *alias)
01226 {
01227    struct ast_variable *var, *tmp;
01228    struct oh323_alias *a;
01229 
01230    var = ast_load_realtime("h323", "name", alias, NULL);
01231 
01232    if (!var)
01233       return NULL;
01234 
01235    for (tmp = var; tmp; tmp = tmp->next) {
01236       if (!strcasecmp(tmp->name, "type") &&
01237       !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) {
01238          ast_variables_destroy(var);
01239          return NULL;
01240       }
01241    }
01242 
01243    a = build_alias(alias, var, NULL, 1);
01244 
01245    ast_variables_destroy(var);
01246 
01247    return a;
01248 }
01249 
01250 #define DEPRECATED(_v, _new_opt) \
01251    ast_log(LOG_WARNING, "Option %s found at line %d has beed deprecated. Use %s instead.\n", (_v)->name, (_v)->lineno, (_new_opt))
01252 
01253 static int update_common_options(struct ast_variable *v, struct call_options *options)
01254 {
01255    int tmp;
01256 
01257    if (!strcasecmp(v->name, "allow")) {
01258       ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
01259    } else if (!strcasecmp(v->name, "disallow")) {
01260       ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
01261    } else if (!strcasecmp(v->name, "dtmfmode")) {
01262       if (!strcasecmp(v->value, "inband")) {
01263          options->dtmfmode = H323_DTMF_INBAND;
01264       } else if (!strcasecmp(v->value, "rfc2833")) {
01265          options->dtmfmode = H323_DTMF_RFC2833;
01266       } else {
01267          ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
01268          options->dtmfmode = H323_DTMF_RFC2833;
01269       }
01270    } else if (!strcasecmp(v->name, "dtmfcodec")) {
01271       tmp = atoi(v->value);
01272       if (tmp < 96)
01273          ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno);
01274       else
01275          options->dtmfcodec = tmp;
01276    } else if (!strcasecmp(v->name, "bridge")) {
01277       options->bridge = ast_true(v->value);
01278    } else if (!strcasecmp(v->name, "nat")) {
01279       options->nat = ast_true(v->value);
01280    } else if (!strcasecmp(v->name, "noFastStart")) {
01281       DEPRECATED(v, "fastStart");
01282       options->fastStart = !ast_true(v->value);
01283    } else if (!strcasecmp(v->name, "fastStart")) {
01284       options->fastStart = ast_true(v->value);
01285    } else if (!strcasecmp(v->name, "noH245Tunneling")) {
01286       DEPRECATED(v, "h245Tunneling");
01287       options->h245Tunneling = !ast_true(v->value);
01288    } else if (!strcasecmp(v->name, "h245Tunneling")) {
01289       options->h245Tunneling = ast_true(v->value);
01290    } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
01291       DEPRECATED(v, "silenceSuppression");
01292       options->silenceSuppression = !ast_true(v->value);
01293    } else if (!strcasecmp(v->name, "silenceSuppression")) {
01294       options->silenceSuppression = ast_true(v->value);
01295    } else if (!strcasecmp(v->name, "progress_setup")) {
01296       tmp = atoi(v->value);
01297       if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) {
01298          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
01299          tmp = 0;
01300       }
01301       options->progress_setup = tmp;
01302    } else if (!strcasecmp(v->name, "progress_alert")) {
01303       tmp = atoi(v->value);
01304       if ((tmp != 0) && (tmp != 1) && (tmp != 8)) {
01305          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
01306          tmp = 0;
01307       }
01308       options->progress_alert = tmp;
01309    } else if (!strcasecmp(v->name, "progress_audio")) {
01310       options->progress_audio = ast_true(v->value);
01311    } else if (!strcasecmp(v->name, "callerid")) {
01312       ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num));
01313    } else if (!strcasecmp(v->name, "fullname")) {
01314       ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name));
01315    } else if (!strcasecmp(v->name, "cid_number")) {
01316       ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num));
01317    } else if (!strcasecmp(v->name, "tunneling")) {
01318       if (!strcasecmp(v->value, "none"))
01319          options->tunnelOptions = 0;
01320       else if (!strcasecmp(v->value, "cisco"))
01321          options->tunnelOptions |= H323_TUNNEL_CISCO;
01322       else if (!strcasecmp(v->value, "qsig"))
01323          options->tunnelOptions |= H323_TUNNEL_QSIG;
01324       else
01325          ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
01326    } else
01327       return 1;
01328 
01329    return 0;
01330 }
01331 #undef DEPRECATED
01332 
01333 static struct oh323_user *build_user(char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01334 {
01335    struct oh323_user *user;
01336    struct ast_ha *oldha;
01337    int found = 0;
01338    int format;
01339 
01340    user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp);
01341 
01342    if (user)
01343       found++;
01344    else {
01345       if (!(user = (struct oh323_user *)calloc(1, sizeof(*user))))
01346          return NULL;
01347       ASTOBJ_INIT(user);
01348    }
01349    oldha = user->ha;
01350    user->ha = (struct ast_ha *)NULL;
01351    memcpy(&user->options, &global_options, sizeof(user->options));
01352    /* Set default context */
01353    ast_copy_string(user->context, default_context, sizeof(user->context));
01354    if (user && !found)
01355       ast_copy_string(user->name, name, sizeof(user->name));
01356 
01357 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
01358    if (user->chanvars) {
01359       ast_variables_destroy(user->chanvars);
01360       user->chanvars = NULL;
01361    }
01362 #endif
01363 
01364    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01365       if (!update_common_options(v, &user->options))
01366          continue;
01367       if (!strcasecmp(v->name, "context")) {
01368          ast_copy_string(user->context, v->value, sizeof(user->context));
01369       } else if (!strcasecmp(v->name, "secret")) {
01370          ast_copy_string(user->secret, v->value, sizeof(user->secret));
01371       } else if (!strcasecmp(v->name, "accountcode")) {
01372          ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode));
01373       } else if (!strcasecmp(v->name, "host")) {
01374          if (!strcasecmp(v->value, "dynamic")) {
01375             ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
01376             ASTOBJ_UNREF(user, oh323_destroy_user);
01377             return NULL;
01378          } else if (ast_get_ip(&user->addr, v->value)) {
01379             ASTOBJ_UNREF(user, oh323_destroy_user);
01380             return NULL;
01381          }
01382          /* Let us know we need to use ip authentication */
01383          user->host = 1;
01384       } else if (!strcasecmp(v->name, "amaflags")) {
01385          format = ast_cdr_amaflags2int(v->value);
01386          if (format < 0) {
01387             ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
01388          } else {
01389             user->amaflags = format;
01390          }
01391       } else if (!strcasecmp(v->name, "permit") ||
01392                !strcasecmp(v->name, "deny")) {
01393          user->ha = ast_append_ha(v->name, v->value, user->ha);
01394       }
01395    }
01396    ASTOBJ_UNMARK(user);
01397    ast_free_ha(oldha);
01398    return user;
01399 }
01400 
01401 static struct oh323_user *realtime_user(const call_details_t *cd)
01402 {
01403    struct ast_variable *var, *tmp;
01404    struct oh323_user *user;
01405    char *username;
01406 
01407    if (userbyalias)
01408       var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, NULL);
01409    else {
01410       username = (char *)NULL;
01411       var = ast_load_realtime("h323", "host", cd->sourceIp, NULL);
01412    }
01413 
01414    if (!var)
01415       return NULL;
01416 
01417    for (tmp = var; tmp; tmp = tmp->next) {
01418       if (!strcasecmp(tmp->name, "type") &&
01419       !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) {
01420          ast_variables_destroy(var);
01421          return NULL;
01422       } else if (!username && !strcasecmp(tmp->name, "name"))
01423          username = tmp->value;
01424    }
01425 
01426    if (!username) {
01427       ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp);
01428       ast_variables_destroy(var);
01429       return NULL;
01430    }
01431 
01432    user = build_user(username, var, NULL, 1);
01433 
01434    ast_variables_destroy(var);
01435 
01436    return user;
01437 }
01438 
01439 static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
01440 {
01441    struct oh323_peer *peer;
01442    struct ast_ha *oldha;
01443    int found = 0;
01444 
01445    peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp);
01446 
01447    if (peer)
01448       found++;
01449    else {
01450       if (!(peer = (struct oh323_peer*)calloc(1, sizeof(*peer))))
01451          return NULL;
01452       ASTOBJ_INIT(peer);
01453    }
01454    oldha = peer->ha;
01455    peer->ha = NULL;
01456    memcpy(&peer->options, &global_options, sizeof(peer->options));
01457    peer->addr.sin_port = htons(h323_signalling_port);
01458    peer->addr.sin_family = AF_INET;
01459    if (!found && name)
01460       ast_copy_string(peer->name, name, sizeof(peer->name));
01461 
01462 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
01463    if (peer->chanvars) {
01464       ast_variables_destroy(peer->chanvars);
01465       peer->chanvars = NULL;
01466    }
01467 #endif
01468    /* Default settings for mailbox */
01469    peer->mailbox[0] = '\0';
01470 
01471    for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
01472       if (!update_common_options(v, &peer->options))
01473          continue;
01474       if (!strcasecmp(v->name, "host")) {
01475          if (!strcasecmp(v->value, "dynamic")) {
01476             ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
01477             ASTOBJ_UNREF(peer, oh323_destroy_peer);
01478             return NULL;
01479          }
01480          if (ast_get_ip(&peer->addr, v->value)) {
01481             ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
01482             ASTOBJ_UNREF(peer, oh323_destroy_peer);
01483             return NULL;
01484          }
01485       } else if (!strcasecmp(v->name, "port")) {
01486          peer->addr.sin_port = htons(atoi(v->value));
01487       } else if (!strcasecmp(v->name, "permit") ||
01488                !strcasecmp(v->name, "deny")) {
01489          peer->ha = ast_append_ha(v->name, v->value, peer->ha);
01490       } else if (!strcasecmp(v->name, "mailbox")) {
01491          ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox));
01492       } else if (!strcasecmp(v->name, "hasvoicemail")) {
01493          if (ast_true(v->value) && ast_strlen_zero(peer->mailbox)) {
01494             ast_copy_string(peer->mailbox, name, sizeof(peer->mailbox));
01495          }
01496       }
01497    }
01498    ASTOBJ_UNMARK(peer);
01499    ast_free_ha(oldha);
01500    return peer;
01501 }
01502 
01503 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
01504 {
01505    struct oh323_peer *peer;
01506    struct ast_variable *var;
01507    struct ast_variable *tmp;
01508    const char *addr;
01509 
01510    /* First check on peer name */
01511    if (peername)
01512       var = ast_load_realtime("h323", "name", peername, addr = NULL);
01513    else if (sin) /* Then check on IP address for dynamic peers */
01514       var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL);
01515    else
01516       return NULL;
01517 
01518    if (!var)
01519       return NULL;
01520 
01521    for (tmp = var; tmp; tmp = tmp->next) {
01522       /* If this is type=user, then skip this object. */
01523       if (!strcasecmp(tmp->name, "type") &&
01524             !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
01525          ast_variables_destroy(var);
01526          return NULL;
01527       } else if (!peername && !strcasecmp(tmp->name, "name")) {
01528          peername = tmp->value;
01529       }
01530    }
01531 
01532    if (!peername) {  /* Did not find peer in realtime */
01533       ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
01534       ast_variables_destroy(var);
01535       return NULL;
01536    }
01537 
01538    /* Peer found in realtime, now build it in memory */
01539    peer = build_peer(peername, var, NULL, 1);
01540 
01541    ast_variables_destroy(var);
01542 
01543    return peer;
01544 }
01545 
01546 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
01547 {
01548    return strcmp(ast_inet_ntoa(inaddr), addr);
01549 }
01550 
01551 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
01552 {
01553    struct oh323_user *u;
01554 
01555    if (userbyalias)
01556       u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
01557    else
01558       u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
01559 
01560    if (!u && realtime)
01561       u = realtime_user(cd);
01562 
01563    if (!u && h323debug)
01564       ast_log(LOG_DEBUG, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
01565 
01566    return u;
01567 }
01568 
01569 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
01570 {
01571    int res;
01572 
01573    if (!sin)
01574       res = -1;
01575    else
01576       res = inaddrcmp(&addr , sin);
01577 
01578    return res;
01579 }
01580 
01581 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
01582 {
01583    struct oh323_peer *p;
01584 
01585    if (peer)
01586       p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
01587    else
01588       p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
01589 
01590    if (!p && realtime)
01591       p = realtime_peer(peer, sin);
01592 
01593    if (!p && h323debug)
01594       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>"));
01595 
01596    return p;
01597 }
01598 
01599 static int create_addr(struct oh323_pvt *pvt, char *opeer)
01600 {
01601    struct hostent *hp;
01602    struct ast_hostent ahp;
01603    struct oh323_peer *p;
01604    int portno;
01605    int found = 0;
01606    char *port;
01607    char *hostn;
01608    char peer[256] = "";
01609 
01610    ast_copy_string(peer, opeer, sizeof(peer));
01611    port = strchr(peer, ':');
01612    if (port) {
01613       *port = '\0';
01614       port++;
01615    }
01616    pvt->sa.sin_family = AF_INET;
01617    p = find_peer(peer, NULL, 1);
01618    if (p) {
01619       found++;
01620       memcpy(&pvt->options, &p->options, sizeof(pvt->options));
01621       pvt->jointcapability = pvt->options.capability;
01622       if (pvt->options.dtmfmode) {
01623          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01624             pvt->nonCodecCapability |= AST_RTP_DTMF;
01625          } else {
01626             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01627          }
01628       }
01629       if (p->addr.sin_addr.s_addr) {
01630          pvt->sa.sin_addr = p->addr.sin_addr;
01631          pvt->sa.sin_port = p->addr.sin_port;
01632       }
01633       ASTOBJ_UNREF(p, oh323_destroy_peer);
01634    }
01635    if (!p && !found) {
01636       hostn = peer;
01637       if (port) {
01638          portno = atoi(port);
01639       } else {
01640          portno = h323_signalling_port;
01641       }
01642       hp = ast_gethostbyname(hostn, &ahp);
01643       if (hp) {
01644          memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
01645          pvt->sa.sin_port = htons(portno);
01646          /* Look peer by address */
01647          p = find_peer(NULL, &pvt->sa, 1);
01648          memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
01649          pvt->jointcapability = pvt->options.capability;
01650          if (p) {
01651             ASTOBJ_UNREF(p, oh323_destroy_peer);
01652          }
01653          if (pvt->options.dtmfmode) {
01654             if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01655                pvt->nonCodecCapability |= AST_RTP_DTMF;
01656             } else {
01657                pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01658             }
01659          }
01660          return 0;
01661       } else {
01662          ast_log(LOG_WARNING, "No such host: %s\n", peer);
01663          return -1;
01664       }
01665    } else if (!found) {
01666       return -1;
01667    } else {
01668       return 0;
01669    }
01670 }
01671 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause)
01672 {
01673    int oldformat;
01674    struct oh323_pvt *pvt;
01675    struct ast_channel *tmpc = NULL;
01676    char *dest = (char *)data;
01677    char *ext, *host;
01678    char *h323id = NULL;
01679    char tmp[256], tmp1[256];
01680 
01681    if (h323debug)
01682       ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
01683 
01684    pvt = oh323_alloc(0);
01685    if (!pvt) {
01686       ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
01687       return NULL;
01688    }
01689    oldformat = format;
01690    format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
01691    if (!format) {
01692       ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
01693       oh323_destroy(pvt);
01694       if (cause)
01695          *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
01696       return NULL;
01697    }
01698    ast_copy_string(tmp, dest, sizeof(tmp));
01699    host = strchr(tmp, '@');
01700    if (host) {
01701       *host = '\0';
01702       host++;
01703       ext = tmp;
01704    } else {
01705       ext = strrchr(tmp, '/');
01706       if (ext)
01707          *ext++ = '\0';
01708       host = tmp;
01709    }
01710    strtok_r(host, "/", &(h323id));
01711    if (!ast_strlen_zero(h323id)) {
01712       h323_set_id(h323id);
01713    }
01714    if (ext) {
01715       ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
01716    }
01717    if (h323debug)
01718       ast_log(LOG_DEBUG, "Extension: %s Host: %s\n", pvt->exten, host);
01719 
01720    if (gatekeeper_disable) {
01721       if (create_addr(pvt, host)) {
01722          oh323_destroy(pvt);
01723          if (cause)
01724             *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
01725          return NULL;
01726       }
01727    }
01728    else {
01729       memcpy(&pvt->options, &global_options, sizeof(pvt->options));
01730       pvt->jointcapability = pvt->options.capability;
01731       if (pvt->options.dtmfmode) {
01732          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01733             pvt->nonCodecCapability |= AST_RTP_DTMF;
01734          } else {
01735             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01736          }
01737       }
01738    }
01739 
01740    ast_mutex_lock(&caplock);
01741    /* Generate unique channel identifier */
01742    snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
01743    tmp1[sizeof(tmp1)-1] = '\0';
01744    ast_mutex_unlock(&caplock);
01745 
01746    ast_mutex_lock(&pvt->lock);
01747    tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1);
01748    ast_mutex_unlock(&pvt->lock);
01749    if (!tmpc) {
01750       oh323_destroy(pvt);
01751       if (cause)
01752          *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
01753    }
01754    ast_update_use_count();
01755    restart_monitor();
01756    return tmpc;
01757 }
01758 
01759 /** Find a call by alias */
01760 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
01761 {
01762    struct oh323_alias *a;
01763 
01764    a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
01765 
01766    if (!a && realtime)
01767       a = realtime_alias(source_aliases);
01768 
01769    return a;
01770 }
01771 
01772 /**
01773   * Callback for sending digits from H.323 up to asterisk
01774   *
01775   */
01776 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
01777 {
01778    struct oh323_pvt *pvt;
01779    int res;
01780 
01781    pvt = find_call_locked(call_reference, token);
01782    if (!pvt) {
01783       ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
01784       return -1;
01785    }
01786    if (h323debug)
01787       ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
01788 
01789    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01790       if (digit == '!')
01791          res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
01792       else {
01793          struct ast_frame f = {
01794             .frametype = AST_FRAME_DTMF_END,
01795             .subclass = digit,
01796             .samples = duration * 8,
01797             .len = duration,
01798             .src = "SEND_DIGIT",
01799          };
01800          if (digit == ' ') {     /* signalUpdate message */
01801             f.subclass = pvt->curDTMF;
01802             AST_SCHED_DEL(sched, pvt->DTMFsched);
01803          } else {          /* Regular input or signal message */
01804             if (pvt->DTMFsched >= 0) {
01805                /* We still don't send DTMF END from previous event, send it now */
01806                AST_SCHED_DEL(sched, pvt->DTMFsched);
01807                f.subclass = pvt->curDTMF;
01808                f.samples = f.len = 0;
01809                ast_queue_frame(pvt->owner, &f);
01810                /* Restore values */
01811                f.subclass = digit;
01812                f.samples = duration * 8;
01813                f.len = duration;
01814             }
01815             if (duration) {      /* This is a signal, signalUpdate follows */
01816                f.frametype = AST_FRAME_DTMF_BEGIN;
01817                pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
01818                if (h323debug)
01819                   ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
01820             }
01821             pvt->curDTMF = digit;
01822          }
01823          res = ast_queue_frame(pvt->owner, &f);
01824       }
01825       ast_channel_unlock(pvt->owner);
01826    } else {
01827       if (digit == '!')
01828          pvt->newcontrol = AST_CONTROL_FLASH;
01829       else {
01830          pvt->newduration = duration;
01831          pvt->newdigit = digit;
01832       }
01833       res = 0;
01834    }
01835    ast_mutex_unlock(&pvt->lock);
01836    return res;
01837 }
01838 
01839 /**
01840   * Callback function used to inform the H.323 stack of the local rtp ip/port details
01841   *
01842   * Returns the local RTP information
01843   */
01844 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
01845 {
01846    struct oh323_pvt *pvt;
01847    struct sockaddr_in us;
01848    struct rtp_info *info;
01849 
01850    info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
01851    if (!info) {
01852       ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
01853       return NULL;
01854    }
01855    pvt = find_call_locked(call_reference, token);
01856    if (!pvt) {
01857       free(info);
01858       ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
01859       return NULL;
01860    }
01861    if (!pvt->rtp)
01862       __oh323_rtp_create(pvt);
01863    if (!pvt->rtp) {
01864       ast_mutex_unlock(&pvt->lock);
01865       free(info);
01866       ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
01867       return NULL;
01868    }
01869    /* figure out our local RTP port and tell the H.323 stack about it */
01870    ast_rtp_get_us(pvt->rtp, &us);
01871    ast_mutex_unlock(&pvt->lock);
01872 
01873    ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
01874    info->port = ntohs(us.sin_port);
01875    if (h323debug)
01876       ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
01877    return info;
01878 }
01879 
01880 /**
01881  * Definition taken from rtp.c for rtpPayloadType because we need it here.
01882  */
01883 struct rtpPayloadType {
01884    int isAstFormat;  /* whether the following code is an AST_FORMAT */
01885    int code;
01886 };
01887 
01888 /**
01889   * Call-back function passing remote ip/port information from H.323 to asterisk
01890   *
01891   * Returns nothing
01892   */
01893 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
01894 {
01895    struct oh323_pvt *pvt;
01896    struct sockaddr_in them;
01897    struct rtpPayloadType rtptype;
01898    int nativeformats_changed;
01899    enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
01900 
01901    if (h323debug)
01902       ast_log(LOG_DEBUG, "Setting up RTP connection for %s\n", token);
01903 
01904    /* Find the call or allocate a private structure if call not found */
01905    pvt = find_call_locked(call_reference, token);
01906    if (!pvt) {
01907       ast_log(LOG_ERROR, "Something is wrong: rtp\n");
01908       return;
01909    }
01910    if (pvt->alreadygone) {
01911       ast_mutex_unlock(&pvt->lock);
01912       return;
01913    }
01914 
01915    if (!pvt->rtp)
01916       __oh323_rtp_create(pvt);
01917 
01918    them.sin_family = AF_INET;
01919    /* only works for IPv4 */
01920    them.sin_addr.s_addr = inet_addr(remoteIp);
01921    them.sin_port = htons(remotePort);
01922 
01923    if (them.sin_addr.s_addr) {
01924       ast_rtp_set_peer(pvt->rtp, &them);
01925       if (pvt->recvonly) {
01926          pvt->recvonly = 0;
01927          rtp_change = NEED_UNHOLD;
01928       }
01929    } else {
01930       ast_rtp_stop(pvt->rtp);
01931       if (!pvt->recvonly) {
01932          pvt->recvonly = 1;
01933          rtp_change = NEED_HOLD;
01934       }
01935    }
01936 
01937    /* Change native format to reflect information taken from OLC/OLCAck */
01938    nativeformats_changed = 0;
01939    if (pt != 128 && pvt->rtp) {  /* Payload type is invalid, so try to use previously decided */
01940       rtptype = ast_rtp_lookup_pt(pvt->rtp, pt);
01941       if (h323debug)
01942          ast_log(LOG_DEBUG, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt);
01943       if (pvt->nativeformats != rtptype.code) {
01944          pvt->nativeformats = rtptype.code;
01945          nativeformats_changed = 1;
01946       }
01947    } else if (h323debug)
01948       ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
01949 
01950    /* Don't try to lock the channel if nothing changed */
01951    if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
01952       if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01953          /* Re-build translation path only if native format(s) has been changed */
01954          if (pvt->owner->nativeformats != pvt->nativeformats) {
01955             if (h323debug)
01956                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);
01957             pvt->owner->nativeformats = pvt->nativeformats;
01958             ast_set_read_format(pvt->owner, pvt->owner->readformat);
01959             ast_set_write_format(pvt->owner, pvt->owner->writeformat);
01960          }
01961          if (pvt->options.progress_audio)
01962             ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
01963          switch (rtp_change) {
01964          case NEED_HOLD:
01965             ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
01966             break;
01967          case NEED_UNHOLD:
01968             ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
01969             break;
01970          default:
01971             break;
01972          }
01973          ast_channel_unlock(pvt->owner);
01974       }
01975       else {
01976          if (pvt->options.progress_audio)
01977             pvt->newcontrol = AST_CONTROL_PROGRESS;
01978          else if (rtp_change == NEED_HOLD)
01979             pvt->newcontrol = AST_CONTROL_HOLD;
01980          else if (rtp_change == NEED_UNHOLD)
01981             pvt->newcontrol = AST_CONTROL_UNHOLD;
01982          if (h323debug)
01983             ast_log(LOG_DEBUG, "RTP connection preparation for %s is pending...\n", token);
01984       }
01985    }
01986    ast_mutex_unlock(&pvt->lock);
01987 
01988    if (h323debug)
01989       ast_log(LOG_DEBUG, "RTP connection prepared for %s\n", token);
01990 
01991    return;
01992 }
01993 
01994 /**
01995   *   Call-back function to signal asterisk that the channel has been answered
01996   * Returns nothing
01997   */
01998 static void connection_made(unsigned call_reference, const char *token)
01999 {
02000    struct oh323_pvt *pvt;
02001 
02002    if (h323debug)
02003       ast_log(LOG_DEBUG, "Call %s answered\n", token);
02004 
02005    pvt = find_call_locked(call_reference, token);
02006    if (!pvt) {
02007       ast_log(LOG_ERROR, "Something is wrong: connection\n");
02008       return;
02009    }
02010 
02011    /* Inform asterisk about remote party connected only on outgoing calls */
02012    if (!pvt->outgoing) {
02013       ast_mutex_unlock(&pvt->lock);
02014       return;
02015    }
02016    /* Do not send ANSWER message more than once */
02017    if (!pvt->connection_established) {
02018       pvt->connection_established = 1;
02019       update_state(pvt, -1, AST_CONTROL_ANSWER);
02020    }
02021    ast_mutex_unlock(&pvt->lock);
02022    return;
02023 }
02024 
02025 static int progress(unsigned call_reference, const char *token, int inband)
02026 {
02027    struct oh323_pvt *pvt;
02028 
02029    if (h323debug)
02030       ast_log(LOG_DEBUG, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
02031 
02032    pvt = find_call_locked(call_reference, token);
02033    if (!pvt) {
02034       ast_log(LOG_ERROR, "Private structure not found in progress.\n");
02035       return -1;
02036    }
02037    if (!pvt->owner) {
02038       ast_mutex_unlock(&pvt->lock);
02039       ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
02040       return -1;
02041    }
02042    update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
02043    ast_mutex_unlock(&pvt->lock);
02044 
02045    return 0;
02046 }
02047 
02048 /**
02049  *  Call-back function for incoming calls
02050  *
02051  *  Returns 1 on success
02052  */
02053 static call_options_t *setup_incoming_call(call_details_t *cd)
02054 {
02055    struct oh323_pvt *pvt;
02056    struct oh323_user *user = NULL;
02057    struct oh323_alias *alias = NULL;
02058 
02059    if (h323debug)
02060       ast_log(LOG_DEBUG, "Setting up incoming call for %s\n", cd->call_token);
02061 
02062    /* allocate the call*/
02063    pvt = oh323_alloc(cd->call_reference);
02064 
02065    if (!pvt) {
02066       ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
02067       cleanup_call_details(cd);
02068       return NULL;
02069    }
02070 
02071    /* Populate the call details in the private structure */
02072    memcpy(&pvt->cd, cd, sizeof(pvt->cd));
02073    memcpy(&pvt->options, &global_options, sizeof(pvt->options));
02074    pvt->jointcapability = pvt->options.capability;
02075 
02076    if (h323debug) {
02077       ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
02078       ast_verbose(VERBOSE_PREFIX_3 " \tCall token:  [%s]\n", pvt->cd.call_token);
02079       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
02080       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
02081       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
02082       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
02083       if (pvt->cd.redirect_reason >= 0)
02084          ast_verbose(VERBOSE_PREFIX_3 " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
02085       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
02086    }
02087 
02088    /* Decide if we are allowing Gatekeeper routed calls*/
02089    if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
02090       if (!ast_strlen_zero(cd->call_dest_e164)) {
02091          ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02092          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02093       } else {
02094          alias = find_alias(cd->call_dest_alias, 1);
02095          if (!alias) {
02096             ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
02097             oh323_destroy(pvt);
02098             return NULL;
02099          }
02100          ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
02101          ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
02102       }
02103    } else {
02104       /* Either this call is not from the Gatekeeper
02105          or we are not allowing gk routed calls */
02106       user = find_user(cd, 1);
02107       if (!user) {
02108          if (!acceptAnonymous) {
02109             ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02110             oh323_destroy(pvt);
02111             return NULL;
02112          }
02113          if (ast_strlen_zero(default_context)) {
02114             ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02115             oh323_destroy(pvt);
02116             return NULL;
02117          }
02118          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02119          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02120             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02121          } else {
02122             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02123          }
02124          if (h323debug)
02125             ast_log(LOG_DEBUG, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
02126       } else {
02127          if (user->host) {
02128             if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
02129                if (ast_strlen_zero(user->context)) {
02130                   if (ast_strlen_zero(default_context)) {
02131                      ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
02132                      oh323_destroy(pvt);
02133                      ASTOBJ_UNREF(user, oh323_destroy_user);
02134                      return NULL;
02135                   }
02136                   ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02137                } else {
02138                   ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02139                }
02140                pvt->exten[0] = 'i';
02141                pvt->exten[1] = '\0';
02142                ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
02143                oh323_destroy(pvt);
02144                ASTOBJ_UNREF(user, oh323_destroy_user);
02145                return NULL;   /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
02146             }
02147          }
02148          ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02149          memcpy(&pvt->options, &user->options, sizeof(pvt->options));
02150          pvt->jointcapability = pvt->options.capability;
02151          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02152             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02153          } else {
02154             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02155          }
02156          if (!ast_strlen_zero(user->accountcode)) {
02157             ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
02158          }
02159          if (user->amaflags) {
02160             pvt->amaflags = user->amaflags;
02161          }
02162          ASTOBJ_UNREF(user, oh323_destroy_user);
02163       }
02164    }
02165    return &pvt->options;
02166 }
02167 
02168 /**
02169  * Call-back function to start PBX when OpenH323 ready to serve incoming call
02170  *
02171  * Returns 1 on success
02172  */
02173 static int answer_call(unsigned call_reference, const char *token)
02174 {
02175    struct oh323_pvt *pvt;
02176    struct ast_channel *c = NULL;
02177    enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
02178    char tmp_exten[sizeof(pvt->exten)];
02179 
02180    if (h323debug)
02181       ast_log(LOG_DEBUG, "Preparing Asterisk to answer for %s\n", token);
02182 
02183    /* Find the call or allocate a private structure if call not found */
02184    pvt = find_call_locked(call_reference, token);
02185    if (!pvt) {
02186       ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
02187       return 0;
02188    }
02189    /* Check if requested extension@context pair exists in the dialplan */
02190    ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
02191 
02192    /* Try to find best extension in specified context */
02193    if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
02194       if (tmp_exten[0] == 's')
02195          try_exten = ext_s;
02196       else if (tmp_exten[0] == 'i')
02197          try_exten = ext_i;
02198       else
02199          try_exten = ext_original;
02200    } else
02201       try_exten = ext_original;
02202    do {
02203       if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
02204          break;
02205       switch (try_exten) {
02206       case ext_original:
02207          tmp_exten[0] = 's';
02208          tmp_exten[1] = '\0';
02209          try_exten = ext_s;
02210          break;
02211       case ext_s:
02212          tmp_exten[0] = 'i';
02213          try_exten = ext_i;
02214          break;
02215       case ext_i:
02216          try_exten = ext_notexists;
02217          break;
02218       default:
02219          break;
02220       }
02221    } while (try_exten != ext_notexists);
02222 
02223    /* Drop the call if we don't have <exten>, s and i extensions */
02224    if (try_exten == ext_notexists) {
02225       ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
02226       ast_mutex_unlock(&pvt->lock);
02227       h323_clear_call(token, AST_CAUSE_UNALLOCATED);
02228       return 0;
02229    } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
02230       if (h323debug)
02231          ast_log(LOG_DEBUG, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
02232       ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
02233    }
02234 
02235    /* allocate a channel and tell asterisk about it */
02236    c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
02237 
02238    /* And release when done */
02239    ast_mutex_unlock(&pvt->lock);
02240    if (!c) {
02241       ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
02242       return 0;
02243    }
02244    return 1;
02245 }
02246 
02247 /**
02248  * Call-back function to establish an outgoing H.323 call
02249  *
02250  * Returns 1 on success
02251  */
02252 static int setup_outgoing_call(call_details_t *cd)
02253 {
02254    /* Use argument here or free it immediately */
02255    cleanup_call_details(cd);
02256 
02257    return 1;
02258 }
02259 
02260 /**
02261   *  Call-back function to signal asterisk that the channel is ringing
02262   *  Returns nothing
02263   */
02264 static void chan_ringing(unsigned call_reference, const char *token)
02265 {
02266    struct oh323_pvt *pvt;
02267 
02268    if (h323debug)
02269       ast_log(LOG_DEBUG, "Ringing on %s\n", token);
02270 
02271    pvt = find_call_locked(call_reference, token);
02272    if (!pvt) {
02273       ast_log(LOG_ERROR, "Something is wrong: ringing\n");
02274       return;
02275    }
02276    if (!pvt->owner) {
02277       ast_mutex_unlock(&pvt->lock);
02278       ast_log(LOG_ERROR, "Channel has no owner\n");
02279       return;
02280    }
02281    update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
02282    ast_mutex_unlock(&pvt->lock);
02283    return;
02284 }
02285 
02286 /**
02287   * Call-back function to cleanup communication
02288   * Returns nothing,
02289   */
02290 static void cleanup_connection(unsigned call_reference, const char *call_token)
02291 {
02292    struct oh323_pvt *pvt;
02293 
02294    if (h323debug)
02295       ast_log(LOG_DEBUG, "Cleaning connection to %s\n", call_token);
02296 
02297    while (1) {
02298       pvt = find_call_locked(call_reference, call_token);
02299       if (!pvt) {
02300          if (h323debug)
02301             ast_log(LOG_DEBUG, "No connection for %s\n", call_token);
02302          return;
02303       }
02304       if (!pvt->owner || !ast_channel_trylock(pvt->owner))
02305          break;
02306 #if 1
02307 #ifdef DEBUG_THREADS
02308       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]);
02309 #else
02310       ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
02311 #endif
02312 #endif
02313       ast_mutex_unlock(&pvt->lock);
02314       usleep(1);
02315    }
02316    if (pvt->rtp) {
02317       /* Immediately stop RTP */
02318       ast_rtp_destroy(pvt->rtp);
02319       pvt->rtp = NULL;
02320    }
02321    /* Free dsp used for in-band DTMF detection */
02322    if (pvt->vad) {
02323       ast_dsp_free(pvt->vad);
02324       pvt->vad = NULL;
02325    }
02326    cleanup_call_details(&pvt->cd);
02327    pvt->alreadygone = 1;
02328    /* Send hangup */
02329    if (pvt->owner) {
02330       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02331       ast_queue_hangup(pvt->owner);
02332       ast_channel_unlock(pvt->owner);
02333    }
02334    ast_mutex_unlock(&pvt->lock);
02335    if (h323debug)
02336       ast_log(LOG_DEBUG, "Connection to %s cleaned\n", call_token);
02337    return;
02338 }
02339 
02340 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
02341 {
02342    struct oh323_pvt *pvt;
02343 
02344    if (h323debug) {
02345       ast_log(LOG_DEBUG, "Hanging up connection to %s with cause %d\n", token, cause);
02346    }
02347 
02348    pvt = find_call_locked(call_reference, token);
02349    if (!pvt) {
02350       if (h323debug) {
02351          ast_log(LOG_DEBUG, "Connection to %s already cleared\n", token);
02352       }
02353       return;
02354    }
02355    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
02356       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02357       pvt->owner->hangupcause = pvt->hangupcause = cause;
02358       ast_queue_hangup(pvt->owner);
02359       ast_channel_unlock(pvt->owner);
02360    }
02361    else {
02362       pvt->needhangup = 1;
02363       pvt->hangupcause = cause;
02364       if (h323debug)
02365          ast_log(LOG_DEBUG, "Hangup for %s is pending\n", token);
02366    }
02367    ast_mutex_unlock(&pvt->lock);
02368 }
02369 
02370 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload)
02371 {
02372    struct oh323_pvt *pvt;
02373 
02374    if (h323debug)
02375       ast_log(LOG_DEBUG, "Setting DTMF payload to %d on %s\n", payload, token);
02376 
02377    pvt = find_call_locked(call_reference, token);
02378    if (!pvt) {
02379       return;
02380    }
02381    if (pvt->rtp) {
02382       ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", "telephone-event", 0);
02383    }
02384    pvt->dtmf_pt = payload;
02385    ast_mutex_unlock(&pvt->lock);
02386    if (h323debug)
02387       ast_log(LOG_DEBUG, "DTMF payload on %s set to %d\n", token, payload);
02388 }
02389 
02390 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
02391 {
02392    struct oh323_pvt *pvt;
02393 
02394    if (h323debug)
02395       ast_log(LOG_DEBUG, "Got remote capabilities from connection %s\n", token);
02396 
02397    pvt = find_call_locked(call_reference, token);
02398    if (!pvt)
02399       return;
02400    pvt->peercapability = capabilities;
02401    pvt->jointcapability = pvt->options.capability & capabilities;
02402    if (prefs) {
02403       memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
02404       if (h323debug) {
02405          int i;
02406          for (i = 0; i < 32; ++i) {
02407             if (!prefs->order[i])
02408                break;
02409             ast_log(LOG_DEBUG, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
02410          }
02411       }
02412       if (pvt->rtp)
02413          ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
02414    }
02415    ast_mutex_unlock(&pvt->lock);
02416 }
02417 
02418 static void set_local_capabilities(unsigned call_reference, const char *token)
02419 {
02420    struct oh323_pvt *pvt;
02421    int capability, dtmfmode, pref_codec;
02422    struct ast_codec_pref prefs;
02423 
02424    if (h323debug)
02425       ast_log(LOG_DEBUG, "Setting capabilities for connection %s\n", token);
02426 
02427    pvt = find_call_locked(call_reference, token);
02428    if (!pvt)
02429       return;
02430    capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
02431    dtmfmode = pvt->options.dtmfmode;
02432    prefs = pvt->options.prefs;
02433    pref_codec = pvt->pref_codec;
02434    ast_mutex_unlock(&pvt->lock);
02435    h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
02436 
02437    if (h323debug)
02438       ast_log(LOG_DEBUG, "Capabilities for connection %s is set\n", token);
02439 }
02440 
02441 static void *do_monitor(void *data)
02442 {
02443    int res;
02444    int reloading;
02445    struct oh323_pvt *oh323 = NULL;
02446 
02447    for(;;) {
02448       /* Check for a reload request */
02449       ast_mutex_lock(&h323_reload_lock);
02450       reloading = h323_reloading;
02451       h323_reloading = 0;
02452       ast_mutex_unlock(&h323_reload_lock);
02453       if (reloading) {
02454          if (option_verbose > 0) {
02455             ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
02456          }
02457          h323_do_reload();
02458       }
02459       /* Check for interfaces needing to be killed */
02460       if (!ast_mutex_trylock(&iflock)) {
02461 #if 1
02462          do {
02463             for (oh323 = iflist; oh323; oh323 = oh323->next) {
02464                if (!ast_mutex_trylock(&oh323->lock)) {
02465                   if (oh323->needdestroy) {
02466                      __oh323_destroy(oh323);
02467                      break;
02468                   }
02469                   ast_mutex_unlock(&oh323->lock);
02470                }
02471             }
02472          } while (/*oh323*/ 0);
02473 #else
02474 restartsearch:
02475          oh323 = iflist;
02476          while(oh323) {
02477             if (!ast_mutex_trylock(&oh323->lock)) {
02478                if (oh323->needdestroy) {
02479                   __oh323_destroy(oh323);
02480                   goto restartsearch;
02481                }
02482                ast_mutex_unlock(&oh323->lock);
02483                oh323 = oh323->next;
02484             }
02485          }
02486 #endif
02487          ast_mutex_unlock(&iflock);
02488       } else
02489          oh323 = (struct oh323_pvt *)1;   /* Force fast loop */
02490       pthread_testcancel();
02491       /* Wait for sched or io */
02492       res = ast_sched_wait(sched);
02493       if ((res < 0) || (res > 1000)) {
02494          res = 1000;
02495       }
02496       /* Do not wait if some channel(s) is destroyed, probably, more available too */
02497       if (oh323)
02498          res = 1;
02499       res = ast_io_wait(io, res);
02500       pthread_testcancel();
02501       ast_mutex_lock(&monlock);
02502       if (res >= 0) {
02503          ast_sched_runq(sched);
02504       }
02505       ast_mutex_unlock(&monlock);
02506    }
02507    /* Never reached */
02508    return NULL;
02509 }
02510 
02511 static int restart_monitor(void)
02512 {
02513    /* If we're supposed to be stopped -- stay stopped */
02514    if (ast_mutex_lock(&monlock)) {
02515       ast_log(LOG_WARNING, "Unable to lock monitor\n");
02516       return -1;
02517    }
02518    if (monitor_thread == AST_PTHREADT_STOP) {
02519       ast_mutex_unlock(&monlock);
02520       return 0;
02521    }
02522    if (monitor_thread == pthread_self()) {
02523       ast_mutex_unlock(&monlock);
02524       ast_log(LOG_WARNING, "Cannot kill myself\n");
02525       return -1;
02526    }
02527    if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
02528       /* Wake up the thread */
02529       pthread_kill(monitor_thread, SIGURG);
02530    } else {
02531       /* Start a new monitor */
02532       if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
02533          monitor_thread = AST_PTHREADT_NULL;
02534          ast_mutex_unlock(&monlock);
02535          ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
02536          return -1;
02537       }
02538    }
02539    ast_mutex_unlock(&monlock);
02540    return 0;
02541 }
02542 
02543 static int h323_do_trace(int fd, int argc, char *argv[])
02544 {
02545    if (argc != 4) {
02546       return RESULT_SHOWUSAGE;
02547    }
02548    h323_debug(1, atoi(argv[3]));
02549    ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
02550    return RESULT_SUCCESS;
02551 }
02552 
02553 static int h323_no_trace(int fd, int argc, char *argv[])
02554 {
02555    if (argc < 3 || argc > 4) {
02556       return RESULT_SHOWUSAGE;
02557    }
02558    h323_debug(0,0);
02559    ast_cli(fd, "H.323 trace disabled\n");
02560    return RESULT_SUCCESS;
02561 }
02562 
02563 static int h323_do_debug(int fd, int argc, char *argv[])
02564 {
02565    if (argc < 2 || argc > 3) {
02566       return RESULT_SHOWUSAGE;
02567    }
02568    h323debug = 1;
02569    ast_cli(fd, "H.323 debug enabled\n");
02570    return RESULT_SUCCESS;
02571 }
02572 
02573 static int h323_no_debug(int fd, int argc, char *argv[])
02574 {
02575    if (argc < 3 || argc > 4) {
02576       return RESULT_SHOWUSAGE;
02577    }
02578    h323debug = 0;
02579    ast_cli(fd, "H.323 debug disabled\n");
02580    return RESULT_SUCCESS;
02581 }
02582 
02583 static int h323_gk_cycle(int fd, int argc, char *argv[])
02584 {
02585    if (argc != 3) {
02586       return RESULT_SHOWUSAGE;
02587    }
02588    h323_gk_urq();
02589 
02590    /* Possibly register with a GK */
02591    if (!gatekeeper_disable) {
02592       if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
02593          ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
02594       }
02595    }
02596    return RESULT_SUCCESS;
02597 }
02598 
02599 static int h323_ep_hangup(int fd, int argc, char *argv[])
02600 {
02601    if (argc != 3) {
02602       return RESULT_SHOWUSAGE;
02603    }
02604    if (h323_soft_hangup(argv[2])) {
02605       ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
02606    } else {
02607       ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
02608    }
02609    return RESULT_SUCCESS;
02610 }
02611 
02612 static int h323_tokens_show(int fd, int argc, char *argv[])
02613 {
02614    if (argc != 3) {
02615       return RESULT_SHOWUSAGE;
02616    }
02617    h323_show_tokens();
02618    return RESULT_SUCCESS;
02619 }
02620 
02621 static char trace_usage[] =
02622 "Usage: h.323 trace <level num>\n"
02623 "       Enables H.323 stack tracing for debugging purposes\n";
02624 
02625 static char no_trace_usage[] =
02626 "Usage: h.323 trace off\n"
02627 "       Disables H.323 stack tracing for debugging purposes\n";
02628 
02629 static char debug_usage[] =
02630 "Usage: h.323 debug\n"
02631 "       Enables H.323 debug output\n";
02632 
02633 static char no_debug_usage[] =
02634 "Usage: h.323 debug off\n"
02635 "       Disables H.323 debug output\n";
02636 
02637 static char show_cycle_usage[] =
02638 "Usage: h.323 gk cycle\n"
02639 "       Manually re-register with the Gatekeper (Currently Disabled)\n";
02640 
02641 static char show_hangup_usage[] =
02642 "Usage: h.323 hangup <token>\n"
02643 "       Manually try to hang up call identified by <token>\n";
02644 
02645 static char show_tokens_usage[] =
02646 "Usage: h.323 show tokens\n"
02647 "       Print out all active call tokens\n";
02648 
02649 static char h323_reload_usage[] =
02650 "Usage: h323 reload\n"
02651 "       Reloads H.323 configuration from h323.conf\n";
02652 
02653 static struct ast_cli_entry cli_h323_no_trace_deprecated = {
02654    { "h.323", "no", "trace", NULL },
02655    h323_no_trace, "Disable H.323 Stack Tracing",
02656    no_trace_usage };
02657 
02658 static struct ast_cli_entry cli_h323_no_debug_deprecated = {
02659    { "h.323", "no", "debug", NULL },
02660    h323_no_debug, "Disable H.323 debug",
02661    no_debug_usage };
02662 
02663 static struct ast_cli_entry cli_h323_debug_deprecated = {
02664    { "h.323", "debug", NULL },
02665    h323_do_debug, "Enable H.323 debug",
02666    debug_usage };
02667 
02668 static struct ast_cli_entry cli_h323_trace_deprecated = {
02669    { "h.323", "trace", NULL },
02670    h323_do_trace, "Enable H.323 Stack Tracing",
02671    trace_usage };
02672 
02673 static struct ast_cli_entry cli_h323_gk_cycle_deprecated = {
02674    { "h.323", "gk", "cycle", NULL },
02675    h323_gk_cycle, "Manually re-register with the Gatekeper",
02676    show_cycle_usage };
02677 
02678 static struct ast_cli_entry cli_h323[] = {
02679    { { "h323", "set", "trace", NULL },
02680    h323_do_trace, "Enable H.323 Stack Tracing",
02681    trace_usage, NULL, &cli_h323_trace_deprecated },
02682 
02683    { { "h323", "set", "trace", "off", NULL },
02684    h323_no_trace, "Disable H.323 Stack Tracing",
02685    no_trace_usage, NULL, &cli_h323_no_trace_deprecated },
02686 
02687    { { "h323", "set", "debug", NULL },
02688    h323_do_debug, "Enable H.323 debug",
02689    debug_usage, NULL, &cli_h323_debug_deprecated },
02690 
02691    { { "h323", "set", "debug", "off", NULL },
02692    h323_no_debug, "Disable H.323 debug",
02693    no_debug_usage, NULL, &cli_h323_no_debug_deprecated },
02694 
02695    { { "h323", "cycle", "gk", NULL },
02696    h323_gk_cycle, "Manually re-register with the Gatekeper",
02697    show_cycle_usage, NULL, &cli_h323_gk_cycle_deprecated },
02698 
02699    { { "h323", "hangup", NULL },
02700    h323_ep_hangup, "Manually try to hang up a call",
02701    show_hangup_usage },
02702 
02703    { { "h323", "show", "tokens", NULL },
02704    h323_tokens_show, "Show all active call tokens",
02705    show_tokens_usage },
02706 };
02707 
02708 static void delete_users(void)
02709 {
02710    int pruned = 0;
02711 
02712    /* Delete all users */
02713    ASTOBJ_CONTAINER_WRLOCK(&userl);
02714    ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
02715       ASTOBJ_RDLOCK(iterator);
02716       ASTOBJ_MARK(iterator);
02717       ++pruned;
02718       ASTOBJ_UNLOCK(iterator);
02719    } while (0) );
02720    if (pruned) {
02721       ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
02722    }
02723    ASTOBJ_CONTAINER_UNLOCK(&userl);
02724 
02725    ASTOBJ_CONTAINER_WRLOCK(&peerl);
02726    ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
02727       ASTOBJ_RDLOCK(iterator);
02728       ASTOBJ_MARK(iterator);
02729       ASTOBJ_UNLOCK(iterator);
02730    } while (0) );
02731    ASTOBJ_CONTAINER_UNLOCK(&peerl);
02732 }
02733 
02734 static void delete_aliases(void)
02735 {
02736    int pruned = 0;
02737 
02738    /* Delete all aliases */
02739    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02740    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02741       ASTOBJ_RDLOCK(iterator);
02742       ASTOBJ_MARK(iterator);
02743       ++pruned;
02744       ASTOBJ_UNLOCK(iterator);
02745    } while (0) );
02746    if (pruned) {
02747       ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
02748    }
02749    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02750 }
02751 
02752 static void prune_peers(void)
02753 {
02754    /* Prune peers who still are supposed to be deleted */
02755    ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
02756 }
02757 
02758 static int reload_config(int is_reload)
02759 {
02760    int format;
02761    struct ast_config *cfg, *ucfg;
02762    struct ast_variable *v;
02763    struct oh323_peer *peer = NULL;
02764    struct oh323_user *user = NULL;
02765    struct oh323_alias *alias = NULL;
02766    struct ast_hostent ahp; struct hostent *hp;
02767    char *cat;
02768    const char *utype;
02769    int is_user, is_peer, is_alias;
02770    char _gatekeeper[100];
02771    int gk_discover, gk_disable, gk_changed;
02772 
02773    cfg = ast_config_load(config);
02774 
02775    /* We *must* have a config file otherwise stop immediately */
02776    if (!cfg) {
02777       ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
02778       return 1;
02779    }
02780 
02781    if (is_reload) {
02782       delete_users();
02783       delete_aliases();
02784       prune_peers();
02785    }
02786 
02787    /* fire up the H.323 Endpoint */
02788    if (!h323_end_point_exist()) {
02789       h323_end_point_create();
02790    }
02791    ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
02792    gk_discover = gatekeeper_discover;
02793    gk_disable = gatekeeper_disable;
02794    memset(&bindaddr, 0, sizeof(bindaddr));
02795    memset(&global_options, 0, sizeof(global_options));
02796    global_options.fastStart = 1;
02797    global_options.h245Tunneling = 1;
02798    global_options.dtmfcodec = 101;
02799    global_options.dtmfmode = H323_DTMF_RFC2833;
02800    global_options.capability = GLOBAL_CAPABILITY;
02801    global_options.bridge = 1;    /* Do native bridging by default */
02802    strcpy(default_context, "default");
02803    h323_signalling_port = 1720;
02804    gatekeeper_disable = 1;
02805    gatekeeper_discover = 0;
02806    gkroute = 0;
02807    userbyalias = 1;
02808    acceptAnonymous = 1;
02809    tos = 0;
02810 
02811    /* Copy the default jb config over global_jbconf */
02812    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
02813 
02814    /* Load configuration from users.conf */
02815    ucfg = ast_config_load("users.conf");
02816    if (ucfg) {
02817       struct ast_variable *gen;
02818       int genhas_h323;
02819       const char *has_h323;
02820 
02821       genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
02822       gen = ast_variable_browse(ucfg, "general");
02823       for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
02824          if (strcasecmp(cat, "general")) {
02825             has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
02826             if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
02827                user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
02828                if (user) {
02829                   ASTOBJ_CONTAINER_LINK(&userl, user);
02830                   ASTOBJ_UNREF(user, oh323_destroy_user);
02831                }
02832                peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0);
02833                if (peer) {
02834                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02835                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02836                }
02837             }
02838          }
02839       }
02840       ast_config_destroy(ucfg);
02841    }
02842 
02843    for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
02844       /* handle jb conf */
02845       if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
02846          continue;
02847       /* Create the interface list */
02848       if (!strcasecmp(v->name, "port")) {
02849          h323_signalling_port = (int)strtol(v->value, NULL, 10);
02850       } else if (!strcasecmp(v->name, "bindaddr")) {
02851          if (!(hp = ast_gethostbyname(v->value, &ahp))) {
02852             ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
02853          } else {
02854             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
02855          }
02856       } else if (!strcasecmp(v->name, "tos")) {
02857          if (sscanf(v->value, "%d", &format)) {
02858             tos = format & 0xff;
02859          } else if (!strcasecmp(v->value, "lowdelay")) {
02860             tos = IPTOS_LOWDELAY;
02861          } else if (!strcasecmp(v->value, "throughput")) {
02862             tos = IPTOS_THROUGHPUT;
02863          } else if (!strcasecmp(v->value, "reliability")) {
02864             tos = IPTOS_RELIABILITY;
02865          } else if (!strcasecmp(v->value, "mincost")) {
02866             tos = IPTOS_MINCOST;
02867          } else if (!strcasecmp(v->value, "none")) {
02868             tos = 0;
02869          } else {
02870             ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
02871          }
02872       } else if (!strcasecmp(v->name, "gatekeeper")) {
02873          if (!strcasecmp(v->value, "DISABLE")) {
02874             gatekeeper_disable = 1;
02875          } else if (!strcasecmp(v->value, "DISCOVER")) {
02876             gatekeeper_disable = 0;
02877             gatekeeper_discover = 1;
02878          } else {
02879             gatekeeper_disable = 0;
02880             ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper));
02881          }
02882       } else if (!strcasecmp(v->name, "secret")) {
02883          ast_copy_string(secret, v->value, sizeof(secret));
02884       } else if (!strcasecmp(v->name, "AllowGKRouted")) {
02885          gkroute = ast_true(v->value);
02886       } else if (!strcasecmp(v->name, "context")) {
02887          ast_copy_string(default_context, v->value, sizeof(default_context));
02888          ast_verbose(VERBOSE_PREFIX_2 "Setting default context to %s\n", default_context);
02889       } else if (!strcasecmp(v->name, "UserByAlias")) {
02890          userbyalias = ast_true(v->value);
02891       } else if (!strcasecmp(v->name, "AcceptAnonymous")) {
02892          acceptAnonymous = ast_true(v->value);
02893       } else if (!update_common_options(v, &global_options)) {
02894          /* dummy */
02895       }
02896    }
02897 
02898    for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
02899       if (strcasecmp(cat, "general")) {
02900          utype = ast_variable_retrieve(cfg, cat, "type");
02901          if (utype) {
02902             is_user = is_peer = is_alias = 0;
02903             if (!strcasecmp(utype, "user"))
02904                is_user = 1;
02905             else if (!strcasecmp(utype, "peer"))
02906                is_peer = 1;
02907             else if (!strcasecmp(utype, "friend"))
02908                is_user = is_peer = 1;
02909             else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias"))
02910                is_alias = 1;
02911             else {
02912                ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
02913                continue;
02914             }
02915             if (is_user) {
02916                user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0);
02917                if (user) {
02918                   ASTOBJ_CONTAINER_LINK(&userl, user);
02919                   ASTOBJ_UNREF(user, oh323_destroy_user);
02920                }
02921             }
02922             if (is_peer) {
02923                peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0);
02924                if (peer) {
02925                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02926                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02927                }
02928             }
02929             if (is_alias) {
02930                alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0);
02931                if (alias) {
02932                   ASTOBJ_CONTAINER_LINK(&aliasl, alias);
02933                   ASTOBJ_UNREF(alias, oh323_destroy_alias);
02934                }
02935             }
02936          } else {
02937             ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
02938          }
02939       }
02940    }
02941    ast_config_destroy(cfg);
02942 
02943    /* Register our H.323 aliases if any*/
02944    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02945    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02946       ASTOBJ_RDLOCK(iterator);
02947       if (h323_set_alias(iterator)) {
02948          ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
02949          ASTOBJ_UNLOCK(iterator);
02950          continue;
02951       }
02952       ASTOBJ_UNLOCK(iterator);
02953    } while (0) );
02954    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02955 
02956    /* Don't touch GK if nothing changed because URQ will drop all existing calls */
02957    gk_changed = 0;
02958    if (gatekeeper_disable != gk_disable)
02959       gk_changed = is_reload;
02960    else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover))
02961       gk_changed = is_reload;
02962    else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0))
02963       gk_changed = is_reload;
02964    if (gk_changed) {
02965       if(!gk_disable)
02966          h323_gk_urq();
02967       if (!gatekeeper_disable) {
02968          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
02969             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
02970             gatekeeper_disable = 1;
02971          }
02972       }
02973    }
02974    return 0;
02975 }
02976 
02977 static int h323_reload(int fd, int argc, char *argv[])
02978 {
02979    ast_mutex_lock(&h323_reload_lock);
02980    if (h323_reloading) {
02981       ast_verbose("Previous H.323 reload not yet done\n");
02982    } else {
02983       h323_reloading = 1;
02984    }
02985    ast_mutex_unlock(&h323_reload_lock);
02986    restart_monitor();
02987    return 0;
02988 }
02989 
02990 static int h323_do_reload(void)
02991 {
02992    reload_config(1);
02993    return 0;
02994 }
02995 
02996 static int reload(void)
02997 {
02998    if (!sched || !io) {
02999       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03000       return 0;
03001    }
03002    return h323_reload(0, 0, NULL);
03003 }
03004 
03005 static struct ast_cli_entry cli_h323_reload =
03006    { { "h.323", "reload", NULL },
03007    h323_reload, "Reload H.323 configuration",
03008    h323_reload_usage
03009 };
03010 
03011 static enum ast_rtp_get_result oh323_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03012 {
03013    struct oh323_pvt *pvt;
03014    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
03015 
03016    if (!(pvt = (struct oh323_pvt *)chan->tech_pvt))
03017       return res;
03018 
03019    ast_mutex_lock(&pvt->lock);
03020    if (pvt->rtp && pvt->options.bridge) {
03021       *rtp = pvt->rtp;
03022       res = AST_RTP_TRY_NATIVE;
03023    }
03024    ast_mutex_unlock(&pvt->lock);
03025 
03026    return res;
03027 }
03028 
03029 static enum ast_rtp_get_result oh323_get_vrtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03030 {
03031    return AST_RTP_GET_FAILED;
03032 }
03033 
03034 static char *convertcap(int cap)
03035 {
03036    switch (cap) {
03037    case AST_FORMAT_G723_1:
03038       return "G.723";
03039    case AST_FORMAT_GSM:
03040       return "GSM";
03041    case AST_FORMAT_ULAW:
03042       return "ULAW";
03043    case AST_FORMAT_ALAW:
03044       return "ALAW";
03045    case AST_FORMAT_G722:
03046       return "G.722";
03047    case AST_FORMAT_ADPCM:
03048       return "G.728";
03049    case AST_FORMAT_G729A:
03050       return "G.729";
03051    case AST_FORMAT_SPEEX:
03052       return "SPEEX";
03053    case AST_FORMAT_ILBC:
03054       return "ILBC";
03055    default:
03056       ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
03057       return NULL;
03058    }
03059 }
03060 
03061 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
03062 {
03063    /* XXX Deal with Video */
03064    struct oh323_pvt *pvt;
03065    struct sockaddr_in them;
03066    struct sockaddr_in us;
03067    char *mode;
03068 
03069    if (!rtp) {
03070       return 0;
03071    }
03072 
03073    mode = convertcap(chan->writeformat);
03074    pvt = (struct oh323_pvt *) chan->tech_pvt;
03075    if (!pvt) {
03076       ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
03077       return -1;
03078    }
03079    ast_rtp_get_peer(rtp, &them);
03080    ast_rtp_get_us(rtp, &us);
03081 #if 0 /* Native bridge still isn't ready */
03082    h323_native_bridge(pvt->cd.call_token, ast_inet_ntoa(them.sin_addr), mode);
03083 #endif
03084    return 0;
03085 }
03086 
03087 static struct ast_rtp_protocol oh323_rtp = {
03088    .type = "H323",
03089    .get_rtp_info = oh323_get_rtp_peer,
03090    .get_vrtp_info = oh323_get_vrtp_peer,
03091    .set_rtp_peer = oh323_set_rtp_peer,
03092 };
03093 
03094 static enum ast_module_load_result load_module(void)
03095 {
03096    int res;
03097 
03098    h323debug = 0;
03099    sched = sched_context_create();
03100    if (!sched) {
03101       ast_log(LOG_WARNING, "Unable to create schedule context\n");
03102       return AST_MODULE_LOAD_FAILURE;
03103    }
03104    io = io_context_create();
03105    if (!io) {
03106       ast_log(LOG_WARNING, "Unable to create I/O context\n");
03107       return AST_MODULE_LOAD_FAILURE;
03108    }
03109    ast_cli_register(&cli_h323_reload);
03110    ASTOBJ_CONTAINER_INIT(&userl);
03111    ASTOBJ_CONTAINER_INIT(&peerl);
03112    ASTOBJ_CONTAINER_INIT(&aliasl);
03113    res = reload_config(0);
03114    if (res) {
03115       /* No config entry */
03116       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03117       ast_cli_unregister(&cli_h323_reload);
03118       io_context_destroy(io);
03119       io = NULL;
03120       sched_context_destroy(sched);
03121       sched = NULL;
03122       ASTOBJ_CONTAINER_DESTROY(&userl);
03123       ASTOBJ_CONTAINER_DESTROY(&peerl);
03124       ASTOBJ_CONTAINER_DESTROY(&aliasl);
03125       return AST_MODULE_LOAD_DECLINE;
03126    } else {
03127       /* Make sure we can register our channel type */
03128       if (ast_channel_register(&oh323_tech)) {
03129          ast_log(LOG_ERROR, "Unable to register channel class 'H323'\n");
03130          ast_cli_unregister(&cli_h323_reload);
03131          h323_end_process();
03132          io_context_destroy(io);
03133          sched_context_destroy(sched);
03134 
03135          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03136          ASTOBJ_CONTAINER_DESTROY(&userl);
03137          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03138          ASTOBJ_CONTAINER_DESTROY(&peerl);
03139          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03140          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03141 
03142          return AST_MODULE_LOAD_FAILURE;
03143       }
03144       ast_cli_register_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03145 
03146       ast_rtp_proto_register(&oh323_rtp);
03147 
03148       /* Register our callback functions */
03149       h323_callback_register(setup_incoming_call,
03150                   setup_outgoing_call,
03151                   external_rtp_create,
03152                   setup_rtp_connection,
03153                   cleanup_connection,
03154                   chan_ringing,
03155                   connection_made,
03156                   receive_digit,
03157                   answer_call,
03158                   progress,
03159                   set_dtmf_payload,
03160                   hangup_connection,
03161                   set_local_capabilities,
03162                   set_peer_capabilities);
03163       /* start the h.323 listener */
03164       if (h323_start_listener(h323_signalling_port, bindaddr)) {
03165          ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
03166          ast_rtp_proto_unregister(&oh323_rtp);
03167          ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03168          ast_cli_unregister(&cli_h323_reload);
03169          h323_end_process();
03170          io_context_destroy(io);
03171          sched_context_destroy(sched);
03172 
03173          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03174          ASTOBJ_CONTAINER_DESTROY(&userl);
03175          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03176          ASTOBJ_CONTAINER_DESTROY(&peerl);
03177          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03178          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03179 
03180          return AST_MODULE_LOAD_FAILURE;
03181       }
03182       /* Possibly register with a GK */
03183       if (!gatekeeper_disable) {
03184          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
03185             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
03186             gatekeeper_disable = 1;
03187             res = AST_MODULE_LOAD_SUCCESS;
03188          }
03189       }
03190       /* And start the monitor for the first time */
03191       restart_monitor();
03192    }
03193    return res;
03194 }
03195 
03196 static int unload_module(void)
03197 {
03198    struct oh323_pvt *p, *pl;
03199 
03200    /* unregister commands */
03201    ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03202    ast_cli_unregister(&cli_h323_reload);
03203 
03204    ast_channel_unregister(&oh323_tech);
03205    ast_rtp_proto_unregister(&oh323_rtp);
03206 
03207    if (!ast_mutex_lock(&iflock)) {
03208       /* hangup all interfaces if they have an owner */
03209       p = iflist;
03210       while(p) {
03211          if (p->owner) {
03212             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
03213          }
03214          p = p->next;
03215       }
03216       iflist = NULL;
03217       ast_mutex_unlock(&iflock);
03218    } else {
03219       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03220       return -1;
03221    }
03222    if (!ast_mutex_lock(&monlock)) {
03223       if ((monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
03224          if (monitor_thread != pthread_self()) {
03225             pthread_cancel(monitor_thread);
03226          }
03227          pthread_kill(monitor_thread, SIGURG);
03228          pthread_join(monitor_thread, NULL);
03229       }
03230       monitor_thread = AST_PTHREADT_STOP;
03231       ast_mutex_unlock(&monlock);
03232    } else {
03233       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
03234       return -1;
03235    }
03236    if (!ast_mutex_lock(&iflock)) {
03237       /* destroy all the interfaces and free their memory */
03238       p = iflist;
03239       while(p) {
03240          pl = p;
03241          p = p->next;
03242          /* free associated memory */
03243          ast_mutex_destroy(&pl->lock);
03244          free(pl);
03245       }
03246       iflist = NULL;
03247       ast_mutex_unlock(&iflock);
03248    } else {
03249       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03250       return -1;
03251    }
03252    if (!gatekeeper_disable)
03253       h323_gk_urq();
03254    h323_end_process();
03255    if (io)
03256       io_context_destroy(io);
03257    if (sched)
03258       sched_context_destroy(sched);
03259 
03260    ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03261    ASTOBJ_CONTAINER_DESTROY(&userl);
03262    ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03263    ASTOBJ_CONTAINER_DESTROY(&peerl);
03264    ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03265    ASTOBJ_CONTAINER_DESTROY(&aliasl);
03266 
03267    return 0;
03268 }
03269 
03270 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "The NuFone Network's OpenH323 Channel Driver",
03271       .load = load_module,
03272       .unload = unload_module,
03273       .reload = reload,
03274 );

Generated on Fri Apr 24 16:25:52 2009 for Asterisk - the Open Source PBX by  doxygen 1.4.7