Mon Mar 31 07:37:57 2008

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__, "$Revision$")
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) && (!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       }
01493    }
01494    ASTOBJ_UNMARK(peer);
01495    ast_free_ha(oldha);
01496    return peer;
01497 }
01498 
01499 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
01500 {
01501    struct oh323_peer *peer;
01502    struct ast_variable *var;
01503    struct ast_variable *tmp;
01504    const char *addr;
01505 
01506    /* First check on peer name */
01507    if (peername)
01508       var = ast_load_realtime("h323", "name", peername, addr = NULL);
01509    else if (sin) /* Then check on IP address for dynamic peers */
01510       var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL);
01511    else
01512       return NULL;
01513 
01514    if (!var)
01515       return NULL;
01516 
01517    for (tmp = var; tmp; tmp = tmp->next) {
01518       /* If this is type=user, then skip this object. */
01519       if (!strcasecmp(tmp->name, "type") &&
01520             !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
01521          ast_variables_destroy(var);
01522          return NULL;
01523       } else if (!peername && !strcasecmp(tmp->name, "name")) {
01524          peername = tmp->value;
01525       }
01526    }
01527 
01528    if (!peername) {  /* Did not find peer in realtime */
01529       ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
01530       ast_variables_destroy(var);
01531       return NULL;
01532    }
01533 
01534    /* Peer found in realtime, now build it in memory */
01535    peer = build_peer(peername, var, NULL, 1);
01536 
01537    ast_variables_destroy(var);
01538 
01539    return peer;
01540 }
01541 
01542 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
01543 {
01544    return strcmp(ast_inet_ntoa(inaddr), addr);
01545 }
01546 
01547 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
01548 {
01549    struct oh323_user *u;
01550 
01551    if (userbyalias)
01552       u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
01553    else
01554       u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
01555 
01556    if (!u && realtime)
01557       u = realtime_user(cd);
01558 
01559    if (!u && h323debug)
01560       ast_log(LOG_DEBUG, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
01561 
01562    return u;
01563 }
01564 
01565 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
01566 {
01567    int res;
01568 
01569    if (!sin)
01570       res = -1;
01571    else
01572       res = inaddrcmp(&addr , sin);
01573 
01574    return res;
01575 }
01576 
01577 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
01578 {
01579    struct oh323_peer *p;
01580 
01581    if (peer)
01582       p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
01583    else
01584       p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
01585 
01586    if (!p && realtime)
01587       p = realtime_peer(peer, sin);
01588 
01589    if (!p && h323debug)
01590       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>"));
01591 
01592    return p;
01593 }
01594 
01595 static int create_addr(struct oh323_pvt *pvt, char *opeer)
01596 {
01597    struct hostent *hp;
01598    struct ast_hostent ahp;
01599    struct oh323_peer *p;
01600    int portno;
01601    int found = 0;
01602    char *port;
01603    char *hostn;
01604    char peer[256] = "";
01605 
01606    ast_copy_string(peer, opeer, sizeof(peer));
01607    port = strchr(peer, ':');
01608    if (port) {
01609       *port = '\0';
01610       port++;
01611    }
01612    pvt->sa.sin_family = AF_INET;
01613    p = find_peer(peer, NULL, 1);
01614    if (p) {
01615       found++;
01616       memcpy(&pvt->options, &p->options, sizeof(pvt->options));
01617       pvt->jointcapability = pvt->options.capability;
01618       if (pvt->options.dtmfmode) {
01619          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01620             pvt->nonCodecCapability |= AST_RTP_DTMF;
01621          } else {
01622             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01623          }
01624       }
01625       if (p->addr.sin_addr.s_addr) {
01626          pvt->sa.sin_addr = p->addr.sin_addr;
01627          pvt->sa.sin_port = p->addr.sin_port;
01628       }
01629       ASTOBJ_UNREF(p, oh323_destroy_peer);
01630    }
01631    if (!p && !found) {
01632       hostn = peer;
01633       if (port) {
01634          portno = atoi(port);
01635       } else {
01636          portno = h323_signalling_port;
01637       }
01638       hp = ast_gethostbyname(hostn, &ahp);
01639       if (hp) {
01640          memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
01641          pvt->sa.sin_port = htons(portno);
01642          /* Look peer by address */
01643          p = find_peer(NULL, &pvt->sa, 1);
01644          memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
01645          pvt->jointcapability = pvt->options.capability;
01646          if (p) {
01647             ASTOBJ_UNREF(p, oh323_destroy_peer);
01648          }
01649          if (pvt->options.dtmfmode) {
01650             if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01651                pvt->nonCodecCapability |= AST_RTP_DTMF;
01652             } else {
01653                pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01654             }
01655          }
01656          return 0;
01657       } else {
01658          ast_log(LOG_WARNING, "No such host: %s\n", peer);
01659          return -1;
01660       }
01661    } else if (!found) {
01662       return -1;
01663    } else {
01664       return 0;
01665    }
01666 }
01667 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause)
01668 {
01669    int oldformat;
01670    struct oh323_pvt *pvt;
01671    struct ast_channel *tmpc = NULL;
01672    char *dest = (char *)data;
01673    char *ext, *host;
01674    char *h323id = NULL;
01675    char tmp[256], tmp1[256];
01676 
01677    if (h323debug)
01678       ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
01679 
01680    pvt = oh323_alloc(0);
01681    if (!pvt) {
01682       ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
01683       return NULL;
01684    }
01685    oldformat = format;
01686    format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
01687    if (!format) {
01688       ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
01689       oh323_destroy(pvt);
01690       if (cause)
01691          *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
01692       return NULL;
01693    }
01694    ast_copy_string(tmp, dest, sizeof(tmp));
01695    host = strchr(tmp, '@');
01696    if (host) {
01697       *host = '\0';
01698       host++;
01699       ext = tmp;
01700    } else {
01701       ext = strrchr(tmp, '/');
01702       if (ext)
01703          *ext++ = '\0';
01704       host = tmp;
01705    }
01706    strtok_r(host, "/", &(h323id));
01707    if (!ast_strlen_zero(h323id)) {
01708       h323_set_id(h323id);
01709    }
01710    if (ext) {
01711       ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
01712    }
01713    if (h323debug)
01714       ast_log(LOG_DEBUG, "Extension: %s Host: %s\n", pvt->exten, host);
01715 
01716    if (gatekeeper_disable) {
01717       if (create_addr(pvt, host)) {
01718          oh323_destroy(pvt);
01719          if (cause)
01720             *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
01721          return NULL;
01722       }
01723    }
01724    else {
01725       memcpy(&pvt->options, &global_options, sizeof(pvt->options));
01726       pvt->jointcapability = pvt->options.capability;
01727       if (pvt->options.dtmfmode) {
01728          if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
01729             pvt->nonCodecCapability |= AST_RTP_DTMF;
01730          } else {
01731             pvt->nonCodecCapability &= ~AST_RTP_DTMF;
01732          }
01733       }
01734    }
01735 
01736    ast_mutex_lock(&caplock);
01737    /* Generate unique channel identifier */
01738    snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
01739    tmp1[sizeof(tmp1)-1] = '\0';
01740    ast_mutex_unlock(&caplock);
01741 
01742    ast_mutex_lock(&pvt->lock);
01743    tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1);
01744    ast_mutex_unlock(&pvt->lock);
01745    if (!tmpc) {
01746       oh323_destroy(pvt);
01747       if (cause)
01748          *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
01749    }
01750    ast_update_use_count();
01751    restart_monitor();
01752    return tmpc;
01753 }
01754 
01755 /** Find a call by alias */
01756 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
01757 {
01758    struct oh323_alias *a;
01759 
01760    a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
01761 
01762    if (!a && realtime)
01763       a = realtime_alias(source_aliases);
01764 
01765    return a;
01766 }
01767 
01768 /**
01769   * Callback for sending digits from H.323 up to asterisk
01770   *
01771   */
01772 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
01773 {
01774    struct oh323_pvt *pvt;
01775    int res;
01776 
01777    pvt = find_call_locked(call_reference, token);
01778    if (!pvt) {
01779       ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
01780       return -1;
01781    }
01782    if (h323debug)
01783       ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
01784 
01785    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01786       if (digit == '!')
01787          res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
01788       else {
01789          struct ast_frame f = {
01790             .frametype = AST_FRAME_DTMF_END,
01791             .subclass = digit,
01792             .samples = duration * 8,
01793             .len = duration,
01794             .src = "SEND_DIGIT",
01795          };
01796          if (digit == ' ') {     /* signalUpdate message */
01797             f.subclass = pvt->curDTMF;
01798             AST_SCHED_DEL(sched, pvt->DTMFsched);
01799          } else {          /* Regular input or signal message */
01800             if (pvt->DTMFsched >= 0) {
01801                /* We still don't send DTMF END from previous event, send it now */
01802                AST_SCHED_DEL(sched, pvt->DTMFsched);
01803                f.subclass = pvt->curDTMF;
01804                f.samples = f.len = 0;
01805                ast_queue_frame(pvt->owner, &f);
01806                /* Restore values */
01807                f.subclass = digit;
01808                f.samples = duration * 8;
01809                f.len = duration;
01810             }
01811             if (duration) {      /* This is a signal, signalUpdate follows */
01812                f.frametype = AST_FRAME_DTMF_BEGIN;
01813                pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
01814                if (h323debug)
01815                   ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
01816             }
01817             pvt->curDTMF = digit;
01818          }
01819          res = ast_queue_frame(pvt->owner, &f);
01820       }
01821       ast_channel_unlock(pvt->owner);
01822    } else {
01823       if (digit == '!')
01824          pvt->newcontrol = AST_CONTROL_FLASH;
01825       else {
01826          pvt->newduration = duration;
01827          pvt->newdigit = digit;
01828       }
01829       res = 0;
01830    }
01831    ast_mutex_unlock(&pvt->lock);
01832    return res;
01833 }
01834 
01835 /**
01836   * Callback function used to inform the H.323 stack of the local rtp ip/port details
01837   *
01838   * Returns the local RTP information
01839   */
01840 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
01841 {
01842    struct oh323_pvt *pvt;
01843    struct sockaddr_in us;
01844    struct rtp_info *info;
01845 
01846    info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
01847    if (!info) {
01848       ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
01849       return NULL;
01850    }
01851    pvt = find_call_locked(call_reference, token);
01852    if (!pvt) {
01853       free(info);
01854       ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
01855       return NULL;
01856    }
01857    if (!pvt->rtp)
01858       __oh323_rtp_create(pvt);
01859    if (!pvt->rtp) {
01860       ast_mutex_unlock(&pvt->lock);
01861       free(info);
01862       ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
01863       return NULL;
01864    }
01865    /* figure out our local RTP port and tell the H.323 stack about it */
01866    ast_rtp_get_us(pvt->rtp, &us);
01867    ast_mutex_unlock(&pvt->lock);
01868 
01869    ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
01870    info->port = ntohs(us.sin_port);
01871    if (h323debug)
01872       ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
01873    return info;
01874 }
01875 
01876 /**
01877  * Definition taken from rtp.c for rtpPayloadType because we need it here.
01878  */
01879 struct rtpPayloadType {
01880    int isAstFormat;  /* whether the following code is an AST_FORMAT */
01881    int code;
01882 };
01883 
01884 /**
01885   * Call-back function passing remote ip/port information from H.323 to asterisk
01886   *
01887   * Returns nothing
01888   */
01889 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
01890 {
01891    struct oh323_pvt *pvt;
01892    struct sockaddr_in them;
01893    struct rtpPayloadType rtptype;
01894    int nativeformats_changed;
01895    enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
01896 
01897    if (h323debug)
01898       ast_log(LOG_DEBUG, "Setting up RTP connection for %s\n", token);
01899 
01900    /* Find the call or allocate a private structure if call not found */
01901    pvt = find_call_locked(call_reference, token);
01902    if (!pvt) {
01903       ast_log(LOG_ERROR, "Something is wrong: rtp\n");
01904       return;
01905    }
01906    if (pvt->alreadygone) {
01907       ast_mutex_unlock(&pvt->lock);
01908       return;
01909    }
01910 
01911    if (!pvt->rtp)
01912       __oh323_rtp_create(pvt);
01913 
01914    them.sin_family = AF_INET;
01915    /* only works for IPv4 */
01916    them.sin_addr.s_addr = inet_addr(remoteIp);
01917    them.sin_port = htons(remotePort);
01918 
01919    if (them.sin_addr.s_addr) {
01920       ast_rtp_set_peer(pvt->rtp, &them);
01921       if (pvt->recvonly) {
01922          pvt->recvonly = 0;
01923          rtp_change = NEED_UNHOLD;
01924       }
01925    } else {
01926       ast_rtp_stop(pvt->rtp);
01927       if (!pvt->recvonly) {
01928          pvt->recvonly = 1;
01929          rtp_change = NEED_HOLD;
01930       }
01931    }
01932 
01933    /* Change native format to reflect information taken from OLC/OLCAck */
01934    nativeformats_changed = 0;
01935    if (pt != 128 && pvt->rtp) {  /* Payload type is invalid, so try to use previously decided */
01936       rtptype = ast_rtp_lookup_pt(pvt->rtp, pt);
01937       if (h323debug)
01938          ast_log(LOG_DEBUG, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt);
01939       if (pvt->nativeformats != rtptype.code) {
01940          pvt->nativeformats = rtptype.code;
01941          nativeformats_changed = 1;
01942       }
01943    } else if (h323debug)
01944       ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
01945 
01946    /* Don't try to lock the channel if nothing changed */
01947    if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
01948       if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
01949          /* Re-build translation path only if native format(s) has been changed */
01950          if (pvt->owner->nativeformats != pvt->nativeformats) {
01951             if (h323debug)
01952                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);
01953             pvt->owner->nativeformats = pvt->nativeformats;
01954             ast_set_read_format(pvt->owner, pvt->owner->readformat);
01955             ast_set_write_format(pvt->owner, pvt->owner->writeformat);
01956          }
01957          if (pvt->options.progress_audio)
01958             ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
01959          switch (rtp_change) {
01960          case NEED_HOLD:
01961             ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
01962             break;
01963          case NEED_UNHOLD:
01964             ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
01965             break;
01966          default:
01967             break;
01968          }
01969          ast_channel_unlock(pvt->owner);
01970       }
01971       else {
01972          if (pvt->options.progress_audio)
01973             pvt->newcontrol = AST_CONTROL_PROGRESS;
01974          else if (rtp_change == NEED_HOLD)
01975             pvt->newcontrol = AST_CONTROL_HOLD;
01976          else if (rtp_change == NEED_UNHOLD)
01977             pvt->newcontrol = AST_CONTROL_UNHOLD;
01978          if (h323debug)
01979             ast_log(LOG_DEBUG, "RTP connection preparation for %s is pending...\n", token);
01980       }
01981    }
01982    ast_mutex_unlock(&pvt->lock);
01983 
01984    if (h323debug)
01985       ast_log(LOG_DEBUG, "RTP connection prepared for %s\n", token);
01986 
01987    return;
01988 }
01989 
01990 /**
01991   *   Call-back function to signal asterisk that the channel has been answered
01992   * Returns nothing
01993   */
01994 static void connection_made(unsigned call_reference, const char *token)
01995 {
01996    struct oh323_pvt *pvt;
01997 
01998    if (h323debug)
01999       ast_log(LOG_DEBUG, "Call %s answered\n", token);
02000 
02001    pvt = find_call_locked(call_reference, token);
02002    if (!pvt) {
02003       ast_log(LOG_ERROR, "Something is wrong: connection\n");
02004       return;
02005    }
02006 
02007    /* Inform asterisk about remote party connected only on outgoing calls */
02008    if (!pvt->outgoing) {
02009       ast_mutex_unlock(&pvt->lock);
02010       return;
02011    }
02012    /* Do not send ANSWER message more than once */
02013    if (!pvt->connection_established) {
02014       pvt->connection_established = 1;
02015       update_state(pvt, -1, AST_CONTROL_ANSWER);
02016    }
02017    ast_mutex_unlock(&pvt->lock);
02018    return;
02019 }
02020 
02021 static int progress(unsigned call_reference, const char *token, int inband)
02022 {
02023    struct oh323_pvt *pvt;
02024 
02025    if (h323debug)
02026       ast_log(LOG_DEBUG, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
02027 
02028    pvt = find_call_locked(call_reference, token);
02029    if (!pvt) {
02030       ast_log(LOG_ERROR, "Private structure not found in progress.\n");
02031       return -1;
02032    }
02033    if (!pvt->owner) {
02034       ast_mutex_unlock(&pvt->lock);
02035       ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
02036       return -1;
02037    }
02038    update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
02039    ast_mutex_unlock(&pvt->lock);
02040 
02041    return 0;
02042 }
02043 
02044 /**
02045  *  Call-back function for incoming calls
02046  *
02047  *  Returns 1 on success
02048  */
02049 static call_options_t *setup_incoming_call(call_details_t *cd)
02050 {
02051    struct oh323_pvt *pvt;
02052    struct oh323_user *user = NULL;
02053    struct oh323_alias *alias = NULL;
02054 
02055    if (h323debug)
02056       ast_log(LOG_DEBUG, "Setting up incoming call for %s\n", cd->call_token);
02057 
02058    /* allocate the call*/
02059    pvt = oh323_alloc(cd->call_reference);
02060 
02061    if (!pvt) {
02062       ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
02063       cleanup_call_details(cd);
02064       return NULL;
02065    }
02066 
02067    /* Populate the call details in the private structure */
02068    memcpy(&pvt->cd, cd, sizeof(pvt->cd));
02069    memcpy(&pvt->options, &global_options, sizeof(pvt->options));
02070    pvt->jointcapability = pvt->options.capability;
02071 
02072    if (h323debug) {
02073       ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
02074       ast_verbose(VERBOSE_PREFIX_3 " \tCall token:  [%s]\n", pvt->cd.call_token);
02075       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
02076       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
02077       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
02078       ast_verbose(VERBOSE_PREFIX_3 " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
02079       if (pvt->cd.redirect_reason >= 0)
02080          ast_verbose(VERBOSE_PREFIX_3 " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
02081       ast_verbose(VERBOSE_PREFIX_3 " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
02082    }
02083 
02084    /* Decide if we are allowing Gatekeeper routed calls*/
02085    if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
02086       if (!ast_strlen_zero(cd->call_dest_e164)) {
02087          ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02088          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02089       } else {
02090          alias = find_alias(cd->call_dest_alias, 1);
02091          if (!alias) {
02092             ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
02093             oh323_destroy(pvt);
02094             return NULL;
02095          }
02096          ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
02097          ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
02098       }
02099    } else {
02100       /* Either this call is not from the Gatekeeper
02101          or we are not allowing gk routed calls */
02102       user = find_user(cd, 1);
02103       if (!user) {
02104          if (!acceptAnonymous) {
02105             ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02106             oh323_destroy(pvt);
02107             return NULL;
02108          }
02109          if (ast_strlen_zero(default_context)) {
02110             ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
02111             oh323_destroy(pvt);
02112             return NULL;
02113          }
02114          ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02115          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02116             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02117          } else {
02118             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02119          }
02120          if (h323debug)
02121             ast_log(LOG_DEBUG, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
02122       } else {
02123          if (user->host) {
02124             if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
02125                if (ast_strlen_zero(user->context)) {
02126                   if (ast_strlen_zero(default_context)) {
02127                      ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
02128                      oh323_destroy(pvt);
02129                      ASTOBJ_UNREF(user, oh323_destroy_user);
02130                      return NULL;
02131                   }
02132                   ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
02133                } else {
02134                   ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02135                }
02136                pvt->exten[0] = 'i';
02137                pvt->exten[1] = '\0';
02138                ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
02139                oh323_destroy(pvt);
02140                ASTOBJ_UNREF(user, oh323_destroy_user);
02141                return NULL;   /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
02142             }
02143          }
02144          ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
02145          memcpy(&pvt->options, &user->options, sizeof(pvt->options));
02146          pvt->jointcapability = pvt->options.capability;
02147          if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
02148             ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
02149          } else {
02150             ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
02151          }
02152          if (!ast_strlen_zero(user->accountcode)) {
02153             ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
02154          }
02155          if (user->amaflags) {
02156             pvt->amaflags = user->amaflags;
02157          }
02158          ASTOBJ_UNREF(user, oh323_destroy_user);
02159       }
02160    }
02161    return &pvt->options;
02162 }
02163 
02164 /**
02165  * Call-back function to start PBX when OpenH323 ready to serve incoming call
02166  *
02167  * Returns 1 on success
02168  */
02169 static int answer_call(unsigned call_reference, const char *token)
02170 {
02171    struct oh323_pvt *pvt;
02172    struct ast_channel *c = NULL;
02173    enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
02174    char tmp_exten[sizeof(pvt->exten)];
02175 
02176    if (h323debug)
02177       ast_log(LOG_DEBUG, "Preparing Asterisk to answer for %s\n", token);
02178 
02179    /* Find the call or allocate a private structure if call not found */
02180    pvt = find_call_locked(call_reference, token);
02181    if (!pvt) {
02182       ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
02183       return 0;
02184    }
02185    /* Check if requested extension@context pair exists in the dialplan */
02186    ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
02187 
02188    /* Try to find best extension in specified context */
02189    if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
02190       if (tmp_exten[0] == 's')
02191          try_exten = ext_s;
02192       else if (tmp_exten[0] == 'i')
02193          try_exten = ext_i;
02194       else
02195          try_exten = ext_original;
02196    } else
02197       try_exten = ext_original;
02198    do {
02199       if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
02200          break;
02201       switch (try_exten) {
02202       case ext_original:
02203          tmp_exten[0] = 's';
02204          tmp_exten[1] = '\0';
02205          try_exten = ext_s;
02206          break;
02207       case ext_s:
02208          tmp_exten[0] = 'i';
02209          try_exten = ext_i;
02210          break;
02211       case ext_i:
02212          try_exten = ext_notexists;
02213          break;
02214       default:
02215          break;
02216       }
02217    } while (try_exten != ext_notexists);
02218 
02219    /* Drop the call if we don't have <exten>, s and i extensions */
02220    if (try_exten == ext_notexists) {
02221       ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
02222       ast_mutex_unlock(&pvt->lock);
02223       h323_clear_call(token, AST_CAUSE_UNALLOCATED);
02224       return 0;
02225    } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
02226       if (h323debug)
02227          ast_log(LOG_DEBUG, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
02228       ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
02229    }
02230 
02231    /* allocate a channel and tell asterisk about it */
02232    c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
02233 
02234    /* And release when done */
02235    ast_mutex_unlock(&pvt->lock);
02236    if (!c) {
02237       ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
02238       return 0;
02239    }
02240    return 1;
02241 }
02242 
02243 /**
02244  * Call-back function to establish an outgoing H.323 call
02245  *
02246  * Returns 1 on success
02247  */
02248 static int setup_outgoing_call(call_details_t *cd)
02249 {
02250    /* Use argument here or free it immediately */
02251    cleanup_call_details(cd);
02252 
02253    return 1;
02254 }
02255 
02256 /**
02257   *  Call-back function to signal asterisk that the channel is ringing
02258   *  Returns nothing
02259   */
02260 static void chan_ringing(unsigned call_reference, const char *token)
02261 {
02262    struct oh323_pvt *pvt;
02263 
02264    if (h323debug)
02265       ast_log(LOG_DEBUG, "Ringing on %s\n", token);
02266 
02267    pvt = find_call_locked(call_reference, token);
02268    if (!pvt) {
02269       ast_log(LOG_ERROR, "Something is wrong: ringing\n");
02270       return;
02271    }
02272    if (!pvt->owner) {
02273       ast_mutex_unlock(&pvt->lock);
02274       ast_log(LOG_ERROR, "Channel has no owner\n");
02275       return;
02276    }
02277    update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
02278    ast_mutex_unlock(&pvt->lock);
02279    return;
02280 }
02281 
02282 /**
02283   * Call-back function to cleanup communication
02284   * Returns nothing,
02285   */
02286 static void cleanup_connection(unsigned call_reference, const char *call_token)
02287 {
02288    struct oh323_pvt *pvt;
02289 
02290    if (h323debug)
02291       ast_log(LOG_DEBUG, "Cleaning connection to %s\n", call_token);
02292 
02293    while (1) {
02294       pvt = find_call_locked(call_reference, call_token);
02295       if (!pvt) {
02296          if (h323debug)
02297             ast_log(LOG_DEBUG, "No connection for %s\n", call_token);
02298          return;
02299       }
02300       if (!pvt->owner || !ast_channel_trylock(pvt->owner))
02301          break;
02302 #if 1
02303 #ifdef DEBUG_THREADS
02304       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]);
02305 #else
02306       ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
02307 #endif
02308 #endif
02309       ast_mutex_unlock(&pvt->lock);
02310       usleep(1);
02311    }
02312    if (pvt->rtp) {
02313       /* Immediately stop RTP */
02314       ast_rtp_destroy(pvt->rtp);
02315       pvt->rtp = NULL;
02316    }
02317    /* Free dsp used for in-band DTMF detection */
02318    if (pvt->vad) {
02319       ast_dsp_free(pvt->vad);
02320       pvt->vad = NULL;
02321    }
02322    cleanup_call_details(&pvt->cd);
02323    pvt->alreadygone = 1;
02324    /* Send hangup */
02325    if (pvt->owner) {
02326       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02327       ast_queue_hangup(pvt->owner);
02328       ast_channel_unlock(pvt->owner);
02329    }
02330    ast_mutex_unlock(&pvt->lock);
02331    if (h323debug)
02332       ast_log(LOG_DEBUG, "Connection to %s cleaned\n", call_token);
02333    return;
02334 }
02335 
02336 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
02337 {
02338    struct oh323_pvt *pvt;
02339 
02340    if (h323debug) {
02341       ast_log(LOG_DEBUG, "Hanging up connection to %s with cause %d\n", token, cause);
02342    }
02343 
02344    pvt = find_call_locked(call_reference, token);
02345    if (!pvt) {
02346       if (h323debug) {
02347          ast_log(LOG_DEBUG, "Connection to %s already cleared\n", token);
02348       }
02349       return;
02350    }
02351    if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
02352       pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
02353       pvt->owner->hangupcause = pvt->hangupcause = cause;
02354       ast_queue_hangup(pvt->owner);
02355       ast_channel_unlock(pvt->owner);
02356    }
02357    else {
02358       pvt->needhangup = 1;
02359       pvt->hangupcause = cause;
02360       if (h323debug)
02361          ast_log(LOG_DEBUG, "Hangup for %s is pending\n", token);
02362    }
02363    ast_mutex_unlock(&pvt->lock);
02364 }
02365 
02366 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload)
02367 {
02368    struct oh323_pvt *pvt;
02369 
02370    if (h323debug)
02371       ast_log(LOG_DEBUG, "Setting DTMF payload to %d on %s\n", payload, token);
02372 
02373    pvt = find_call_locked(call_reference, token);
02374    if (!pvt) {
02375       return;
02376    }
02377    if (pvt->rtp) {
02378       ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", "telephone-event", 0);
02379    }
02380    pvt->dtmf_pt = payload;
02381    ast_mutex_unlock(&pvt->lock);
02382    if (h323debug)
02383       ast_log(LOG_DEBUG, "DTMF payload on %s set to %d\n", token, payload);
02384 }
02385 
02386 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
02387 {
02388    struct oh323_pvt *pvt;
02389 
02390    if (h323debug)
02391       ast_log(LOG_DEBUG, "Got remote capabilities from connection %s\n", token);
02392 
02393    pvt = find_call_locked(call_reference, token);
02394    if (!pvt)
02395       return;
02396    pvt->peercapability = capabilities;
02397    pvt->jointcapability = pvt->options.capability & capabilities;
02398    if (prefs) {
02399       memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
02400       if (h323debug) {
02401          int i;
02402          for (i = 0; i < 32; ++i) {
02403             if (!prefs->order[i])
02404                break;
02405             ast_log(LOG_DEBUG, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
02406          }
02407       }
02408       if (pvt->rtp)
02409          ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
02410    }
02411    ast_mutex_unlock(&pvt->lock);
02412 }
02413 
02414 static void set_local_capabilities(unsigned call_reference, const char *token)
02415 {
02416    struct oh323_pvt *pvt;
02417    int capability, dtmfmode, pref_codec;
02418    struct ast_codec_pref prefs;
02419 
02420    if (h323debug)
02421       ast_log(LOG_DEBUG, "Setting capabilities for connection %s\n", token);
02422 
02423    pvt = find_call_locked(call_reference, token);
02424    if (!pvt)
02425       return;
02426    capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
02427    dtmfmode = pvt->options.dtmfmode;
02428    prefs = pvt->options.prefs;
02429    pref_codec = pvt->pref_codec;
02430    ast_mutex_unlock(&pvt->lock);
02431    h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
02432 
02433    if (h323debug)
02434       ast_log(LOG_DEBUG, "Capabilities for connection %s is set\n", token);
02435 }
02436 
02437 static void *do_monitor(void *data)
02438 {
02439    int res;
02440    int reloading;
02441    struct oh323_pvt *oh323 = NULL;
02442 
02443    for(;;) {
02444       /* Check for a reload request */
02445       ast_mutex_lock(&h323_reload_lock);
02446       reloading = h323_reloading;
02447       h323_reloading = 0;
02448       ast_mutex_unlock(&h323_reload_lock);
02449       if (reloading) {
02450          if (option_verbose > 0) {
02451             ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
02452          }
02453          h323_do_reload();
02454       }
02455       /* Check for interfaces needing to be killed */
02456       if (!ast_mutex_trylock(&iflock)) {
02457 #if 1
02458          do {
02459             for (oh323 = iflist; oh323; oh323 = oh323->next) {
02460                if (!ast_mutex_trylock(&oh323->lock)) {
02461                   if (oh323->needdestroy) {
02462                      __oh323_destroy(oh323);
02463                      break;
02464                   }
02465                   ast_mutex_unlock(&oh323->lock);
02466                }
02467             }
02468          } while (/*oh323*/ 0);
02469 #else
02470 restartsearch:
02471          oh323 = iflist;
02472          while(oh323) {
02473             if (!ast_mutex_trylock(&oh323->lock)) {
02474                if (oh323->needdestroy) {
02475                   __oh323_destroy(oh323);
02476                   goto restartsearch;
02477                }
02478                ast_mutex_unlock(&oh323->lock);
02479                oh323 = oh323->next;
02480             }
02481          }
02482 #endif
02483          ast_mutex_unlock(&iflock);
02484       } else
02485          oh323 = (struct oh323_pvt *)1;   /* Force fast loop */
02486       pthread_testcancel();
02487       /* Wait for sched or io */
02488       res = ast_sched_wait(sched);
02489       if ((res < 0) || (res > 1000)) {
02490          res = 1000;
02491       }
02492       /* Do not wait if some channel(s) is destroyed, probably, more available too */
02493       if (oh323)
02494          res = 1;
02495       res = ast_io_wait(io, res);
02496       pthread_testcancel();
02497       ast_mutex_lock(&monlock);
02498       if (res >= 0) {
02499          ast_sched_runq(sched);
02500       }
02501       ast_mutex_unlock(&monlock);
02502    }
02503    /* Never reached */
02504    return NULL;
02505 }
02506 
02507 static int restart_monitor(void)
02508 {
02509    pthread_attr_t attr;
02510    /* If we're supposed to be stopped -- stay stopped */
02511    if (ast_mutex_lock(&monlock)) {
02512       ast_log(LOG_WARNING, "Unable to lock monitor\n");
02513       return -1;
02514    }
02515    if (monitor_thread == AST_PTHREADT_STOP) {
02516       ast_mutex_unlock(&monlock);
02517       return 0;
02518    }
02519    if (monitor_thread == pthread_self()) {
02520       ast_mutex_unlock(&monlock);
02521       ast_log(LOG_WARNING, "Cannot kill myself\n");
02522       return -1;
02523    }
02524    if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
02525       /* Wake up the thread */
02526       pthread_kill(monitor_thread, SIGURG);
02527    } else {
02528       pthread_attr_init(&attr);
02529       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
02530       /* Start a new monitor */
02531       if (ast_pthread_create_background(&monitor_thread, &attr, do_monitor, NULL) < 0) {
02532          monitor_thread = AST_PTHREADT_NULL;
02533          ast_mutex_unlock(&monlock);
02534          ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
02535          pthread_attr_destroy(&attr);
02536          return -1;
02537       }
02538       pthread_attr_destroy(&attr);
02539    }
02540    ast_mutex_unlock(&monlock);
02541    return 0;
02542 }
02543 
02544 static int h323_do_trace(int fd, int argc, char *argv[])
02545 {
02546    if (argc != 4) {
02547       return RESULT_SHOWUSAGE;
02548    }
02549    h323_debug(1, atoi(argv[3]));
02550    ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
02551    return RESULT_SUCCESS;
02552 }
02553 
02554 static int h323_no_trace(int fd, int argc, char *argv[])
02555 {
02556    if (argc < 3 || argc > 4) {
02557       return RESULT_SHOWUSAGE;
02558    }
02559    h323_debug(0,0);
02560    ast_cli(fd, "H.323 trace disabled\n");
02561    return RESULT_SUCCESS;
02562 }
02563 
02564 static int h323_do_debug(int fd, int argc, char *argv[])
02565 {
02566    if (argc < 2 || argc > 3) {
02567       return RESULT_SHOWUSAGE;
02568    }
02569    h323debug = 1;
02570    ast_cli(fd, "H.323 debug enabled\n");
02571    return RESULT_SUCCESS;
02572 }
02573 
02574 static int h323_no_debug(int fd, int argc, char *argv[])
02575 {
02576    if (argc < 3 || argc > 4) {
02577       return RESULT_SHOWUSAGE;
02578    }
02579    h323debug = 0;
02580    ast_cli(fd, "H.323 debug disabled\n");
02581    return RESULT_SUCCESS;
02582 }
02583 
02584 static int h323_gk_cycle(int fd, int argc, char *argv[])
02585 {
02586    if (argc != 3) {
02587       return RESULT_SHOWUSAGE;
02588    }
02589    h323_gk_urq();
02590 
02591    /* Possibly register with a GK */
02592    if (!gatekeeper_disable) {
02593       if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
02594          ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
02595       }
02596    }
02597    return RESULT_SUCCESS;
02598 }
02599 
02600 static int h323_ep_hangup(int fd, int argc, char *argv[])
02601 {
02602    if (argc != 3) {
02603       return RESULT_SHOWUSAGE;
02604    }
02605    if (h323_soft_hangup(argv[2])) {
02606       ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
02607    } else {
02608       ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
02609    }
02610    return RESULT_SUCCESS;
02611 }
02612 
02613 static int h323_tokens_show(int fd, int argc, char *argv[])
02614 {
02615    if (argc != 3) {
02616       return RESULT_SHOWUSAGE;
02617    }
02618    h323_show_tokens();
02619    return RESULT_SUCCESS;
02620 }
02621 
02622 static char trace_usage[] =
02623 "Usage: h.323 trace <level num>\n"
02624 "       Enables H.323 stack tracing for debugging purposes\n";
02625 
02626 static char no_trace_usage[] =
02627 "Usage: h.323 trace off\n"
02628 "       Disables H.323 stack tracing for debugging purposes\n";
02629 
02630 static char debug_usage[] =
02631 "Usage: h.323 debug\n"
02632 "       Enables H.323 debug output\n";
02633 
02634 static char no_debug_usage[] =
02635 "Usage: h.323 debug off\n"
02636 "       Disables H.323 debug output\n";
02637 
02638 static char show_cycle_usage[] =
02639 "Usage: h.323 gk cycle\n"
02640 "       Manually re-register with the Gatekeper (Currently Disabled)\n";
02641 
02642 static char show_hangup_usage[] =
02643 "Usage: h.323 hangup <token>\n"
02644 "       Manually try to hang up call identified by <token>\n";
02645 
02646 static char show_tokens_usage[] =
02647 "Usage: h.323 show tokens\n"
02648 "       Print out all active call tokens\n";
02649 
02650 static char h323_reload_usage[] =
02651 "Usage: h323 reload\n"
02652 "       Reloads H.323 configuration from h323.conf\n";
02653 
02654 static struct ast_cli_entry cli_h323_no_trace_deprecated = {
02655    { "h.323", "no", "trace", NULL },
02656    h323_no_trace, "Disable H.323 Stack Tracing",
02657    no_trace_usage };
02658 
02659 static struct ast_cli_entry cli_h323_no_debug_deprecated = {
02660    { "h.323", "no", "debug", NULL },
02661    h323_no_debug, "Disable H.323 debug",
02662    no_debug_usage };
02663 
02664 static struct ast_cli_entry cli_h323_debug_deprecated = {
02665    { "h.323", "debug", NULL },
02666    h323_do_debug, "Enable H.323 debug",
02667    debug_usage };
02668 
02669 static struct ast_cli_entry cli_h323_trace_deprecated = {
02670    { "h.323", "trace", NULL },
02671    h323_do_trace, "Enable H.323 Stack Tracing",
02672    trace_usage };
02673 
02674 static struct ast_cli_entry cli_h323_gk_cycle_deprecated = {
02675    { "h.323", "gk", "cycle", NULL },
02676    h323_gk_cycle, "Manually re-register with the Gatekeper",
02677    show_cycle_usage };
02678 
02679 static struct ast_cli_entry cli_h323[] = {
02680    { { "h323", "set", "trace", NULL },
02681    h323_do_trace, "Enable H.323 Stack Tracing",
02682    trace_usage, NULL, &cli_h323_trace_deprecated },
02683 
02684    { { "h323", "set", "trace", "off", NULL },
02685    h323_no_trace, "Disable H.323 Stack Tracing",
02686    no_trace_usage, NULL, &cli_h323_no_trace_deprecated },
02687 
02688    { { "h323", "set", "debug", NULL },
02689    h323_do_debug, "Enable H.323 debug",
02690    debug_usage, NULL, &cli_h323_debug_deprecated },
02691 
02692    { { "h323", "set", "debug", "off", NULL },
02693    h323_no_debug, "Disable H.323 debug",
02694    no_debug_usage, NULL, &cli_h323_no_debug_deprecated },
02695 
02696    { { "h323", "cycle", "gk", NULL },
02697    h323_gk_cycle, "Manually re-register with the Gatekeper",
02698    show_cycle_usage, NULL, &cli_h323_gk_cycle_deprecated },
02699 
02700    { { "h323", "hangup", NULL },
02701    h323_ep_hangup, "Manually try to hang up a call",
02702    show_hangup_usage },
02703 
02704    { { "h323", "show", "tokens", NULL },
02705    h323_tokens_show, "Show all active call tokens",
02706    show_tokens_usage },
02707 };
02708 
02709 static void delete_users(void)
02710 {
02711    int pruned = 0;
02712 
02713    /* Delete all users */
02714    ASTOBJ_CONTAINER_WRLOCK(&userl);
02715    ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
02716       ASTOBJ_RDLOCK(iterator);
02717       ASTOBJ_MARK(iterator);
02718       ++pruned;
02719       ASTOBJ_UNLOCK(iterator);
02720    } while (0) );
02721    if (pruned) {
02722       ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
02723    }
02724    ASTOBJ_CONTAINER_UNLOCK(&userl);
02725 
02726    ASTOBJ_CONTAINER_WRLOCK(&peerl);
02727    ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
02728       ASTOBJ_RDLOCK(iterator);
02729       ASTOBJ_MARK(iterator);
02730       ASTOBJ_UNLOCK(iterator);
02731    } while (0) );
02732    ASTOBJ_CONTAINER_UNLOCK(&peerl);
02733 }
02734 
02735 static void delete_aliases(void)
02736 {
02737    int pruned = 0;
02738 
02739    /* Delete all aliases */
02740    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02741    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02742       ASTOBJ_RDLOCK(iterator);
02743       ASTOBJ_MARK(iterator);
02744       ++pruned;
02745       ASTOBJ_UNLOCK(iterator);
02746    } while (0) );
02747    if (pruned) {
02748       ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
02749    }
02750    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02751 }
02752 
02753 static void prune_peers(void)
02754 {
02755    /* Prune peers who still are supposed to be deleted */
02756    ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
02757 }
02758 
02759 static int reload_config(int is_reload)
02760 {
02761    int format;
02762    struct ast_config *cfg, *ucfg;
02763    struct ast_variable *v;
02764    struct oh323_peer *peer = NULL;
02765    struct oh323_user *user = NULL;
02766    struct oh323_alias *alias = NULL;
02767    struct ast_hostent ahp; struct hostent *hp;
02768    char *cat;
02769    const char *utype;
02770    int is_user, is_peer, is_alias;
02771    char _gatekeeper[100];
02772    int gk_discover, gk_disable, gk_changed;
02773 
02774    cfg = ast_config_load(config);
02775 
02776    /* We *must* have a config file otherwise stop immediately */
02777    if (!cfg) {
02778       ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
02779       return 1;
02780    }
02781 
02782    if (is_reload) {
02783       delete_users();
02784       delete_aliases();
02785       prune_peers();
02786    }
02787 
02788    /* fire up the H.323 Endpoint */
02789    if (!h323_end_point_exist()) {
02790       h323_end_point_create();
02791    }
02792    ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
02793    gk_discover = gatekeeper_discover;
02794    gk_disable = gatekeeper_disable;
02795    memset(&bindaddr, 0, sizeof(bindaddr));
02796    memset(&global_options, 0, sizeof(global_options));
02797    global_options.fastStart = 1;
02798    global_options.h245Tunneling = 1;
02799    global_options.dtmfcodec = 101;
02800    global_options.dtmfmode = H323_DTMF_RFC2833;
02801    global_options.capability = GLOBAL_CAPABILITY;
02802    global_options.bridge = 1;    /* Do native bridging by default */
02803    strcpy(default_context, "default");
02804    h323_signalling_port = 1720;
02805    gatekeeper_disable = 1;
02806    gatekeeper_discover = 0;
02807    gkroute = 0;
02808    userbyalias = 1;
02809    acceptAnonymous = 1;
02810    tos = 0;
02811 
02812    /* Copy the default jb config over global_jbconf */
02813    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
02814 
02815    /* Load configuration from users.conf */
02816    ucfg = ast_config_load("users.conf");
02817    if (ucfg) {
02818       struct ast_variable *gen;
02819       int genhas_h323;
02820       const char *has_h323;
02821 
02822       genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
02823       gen = ast_variable_browse(ucfg, "general");
02824       for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
02825          if (strcasecmp(cat, "general")) {
02826             has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
02827             if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
02828                user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
02829                if (user) {
02830                   ASTOBJ_CONTAINER_LINK(&userl, user);
02831                   ASTOBJ_UNREF(user, oh323_destroy_user);
02832                }
02833                peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0);
02834                if (peer) {
02835                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02836                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02837                }
02838             }
02839          }
02840       }
02841       ast_config_destroy(ucfg);
02842    }
02843 
02844    for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
02845       /* handle jb conf */
02846       if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
02847          continue;
02848       /* Create the interface list */
02849       if (!strcasecmp(v->name, "port")) {
02850          h323_signalling_port = (int)strtol(v->value, NULL, 10);
02851       } else if (!strcasecmp(v->name, "bindaddr")) {
02852          if (!(hp = ast_gethostbyname(v->value, &ahp))) {
02853             ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
02854          } else {
02855             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
02856          }
02857       } else if (!strcasecmp(v->name, "tos")) {
02858          if (sscanf(v->value, "%d", &format)) {
02859             tos = format & 0xff;
02860          } else if (!strcasecmp(v->value, "lowdelay")) {
02861             tos = IPTOS_LOWDELAY;
02862          } else if (!strcasecmp(v->value, "throughput")) {
02863             tos = IPTOS_THROUGHPUT;
02864          } else if (!strcasecmp(v->value, "reliability")) {
02865             tos = IPTOS_RELIABILITY;
02866          } else if (!strcasecmp(v->value, "mincost")) {
02867             tos = IPTOS_MINCOST;
02868          } else if (!strcasecmp(v->value, "none")) {
02869             tos = 0;
02870          } else {
02871             ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
02872          }
02873       } else if (!strcasecmp(v->name, "gatekeeper")) {
02874          if (!strcasecmp(v->value, "DISABLE")) {
02875             gatekeeper_disable = 1;
02876          } else if (!strcasecmp(v->value, "DISCOVER")) {
02877             gatekeeper_disable = 0;
02878             gatekeeper_discover = 1;
02879          } else {
02880             gatekeeper_disable = 0;
02881             ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper));
02882          }
02883       } else if (!strcasecmp(v->name, "secret")) {
02884          ast_copy_string(secret, v->value, sizeof(secret));
02885       } else if (!strcasecmp(v->name, "AllowGKRouted")) {
02886          gkroute = ast_true(v->value);
02887       } else if (!strcasecmp(v->name, "context")) {
02888          ast_copy_string(default_context, v->value, sizeof(default_context));
02889          ast_verbose(VERBOSE_PREFIX_2 "Setting default context to %s\n", default_context);
02890       } else if (!strcasecmp(v->name, "UserByAlias")) {
02891          userbyalias = ast_true(v->value);
02892       } else if (!strcasecmp(v->name, "AcceptAnonymous")) {
02893          acceptAnonymous = ast_true(v->value);
02894       } else if (!update_common_options(v, &global_options)) {
02895          /* dummy */
02896       }
02897    }
02898 
02899    for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
02900       if (strcasecmp(cat, "general")) {
02901          utype = ast_variable_retrieve(cfg, cat, "type");
02902          if (utype) {
02903             is_user = is_peer = is_alias = 0;
02904             if (!strcasecmp(utype, "user"))
02905                is_user = 1;
02906             else if (!strcasecmp(utype, "peer"))
02907                is_peer = 1;
02908             else if (!strcasecmp(utype, "friend"))
02909                is_user = is_peer = 1;
02910             else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias"))
02911                is_alias = 1;
02912             else {
02913                ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
02914                continue;
02915             }
02916             if (is_user) {
02917                user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0);
02918                if (user) {
02919                   ASTOBJ_CONTAINER_LINK(&userl, user);
02920                   ASTOBJ_UNREF(user, oh323_destroy_user);
02921                }
02922             }
02923             if (is_peer) {
02924                peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0);
02925                if (peer) {
02926                   ASTOBJ_CONTAINER_LINK(&peerl, peer);
02927                   ASTOBJ_UNREF(peer, oh323_destroy_peer);
02928                }
02929             }
02930             if (is_alias) {
02931                alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0);
02932                if (alias) {
02933                   ASTOBJ_CONTAINER_LINK(&aliasl, alias);
02934                   ASTOBJ_UNREF(alias, oh323_destroy_alias);
02935                }
02936             }
02937          } else {
02938             ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
02939          }
02940       }
02941    }
02942    ast_config_destroy(cfg);
02943 
02944    /* Register our H.323 aliases if any*/
02945    ASTOBJ_CONTAINER_WRLOCK(&aliasl);
02946    ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
02947       ASTOBJ_RDLOCK(iterator);
02948       if (h323_set_alias(iterator)) {
02949          ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
02950          ASTOBJ_UNLOCK(iterator);
02951          continue;
02952       }
02953       ASTOBJ_UNLOCK(iterator);
02954    } while (0) );
02955    ASTOBJ_CONTAINER_UNLOCK(&aliasl);
02956 
02957    /* Don't touch GK if nothing changed because URQ will drop all existing calls */
02958    gk_changed = 0;
02959    if (gatekeeper_disable != gk_disable)
02960       gk_changed = is_reload;
02961    else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover))
02962       gk_changed = is_reload;
02963    else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0))
02964       gk_changed = is_reload;
02965    if (gk_changed) {
02966       if(!gk_disable)
02967          h323_gk_urq();
02968       if (!gatekeeper_disable) {
02969          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
02970             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
02971             gatekeeper_disable = 1;
02972          }
02973       }
02974    }
02975    return 0;
02976 }
02977 
02978 static int h323_reload(int fd, int argc, char *argv[])
02979 {
02980    ast_mutex_lock(&h323_reload_lock);
02981    if (h323_reloading) {
02982       ast_verbose("Previous H.323 reload not yet done\n");
02983    } else {
02984       h323_reloading = 1;
02985    }
02986    ast_mutex_unlock(&h323_reload_lock);
02987    restart_monitor();
02988    return 0;
02989 }
02990 
02991 static int h323_do_reload(void)
02992 {
02993    reload_config(1);
02994    return 0;
02995 }
02996 
02997 static int reload(void)
02998 {
02999    if (!sched || !io) {
03000       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03001       return 0;
03002    }
03003    return h323_reload(0, 0, NULL);
03004 }
03005 
03006 static struct ast_cli_entry cli_h323_reload =
03007    { { "h.323", "reload", NULL },
03008    h323_reload, "Reload H.323 configuration",
03009    h323_reload_usage
03010 };
03011 
03012 static enum ast_rtp_get_result oh323_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03013 {
03014    struct oh323_pvt *pvt;
03015    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
03016 
03017    if (!(pvt = (struct oh323_pvt *)chan->tech_pvt))
03018       return res;
03019 
03020    ast_mutex_lock(&pvt->lock);
03021    if (pvt->rtp && pvt->options.bridge) {
03022       *rtp = pvt->rtp;
03023       res = AST_RTP_TRY_NATIVE;
03024    }
03025    ast_mutex_unlock(&pvt->lock);
03026 
03027    return res;
03028 }
03029 
03030 static enum ast_rtp_get_result oh323_get_vrtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
03031 {
03032    return AST_RTP_GET_FAILED;
03033 }
03034 
03035 static char *convertcap(int cap)
03036 {
03037    switch (cap) {
03038    case AST_FORMAT_G723_1:
03039       return "G.723";
03040    case AST_FORMAT_GSM:
03041       return "GSM";
03042    case AST_FORMAT_ULAW:
03043       return "ULAW";
03044    case AST_FORMAT_ALAW:
03045       return "ALAW";
03046    case AST_FORMAT_G722:
03047       return "G.722";
03048    case AST_FORMAT_ADPCM:
03049       return "G.728";
03050    case AST_FORMAT_G729A:
03051       return "G.729";
03052    case AST_FORMAT_SPEEX:
03053       return "SPEEX";
03054    case AST_FORMAT_ILBC:
03055       return "ILBC";
03056    default:
03057       ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
03058       return NULL;
03059    }
03060 }
03061 
03062 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
03063 {
03064    /* XXX Deal with Video */
03065    struct oh323_pvt *pvt;
03066    struct sockaddr_in them;
03067    struct sockaddr_in us;
03068    char *mode;
03069 
03070    if (!rtp) {
03071       return 0;
03072    }
03073 
03074    mode = convertcap(chan->writeformat);
03075    pvt = (struct oh323_pvt *) chan->tech_pvt;
03076    if (!pvt) {
03077       ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
03078       return -1;
03079    }
03080    ast_rtp_get_peer(rtp, &them);
03081    ast_rtp_get_us(rtp, &us);
03082 #if 0 /* Native bridge still isn't ready */
03083    h323_native_bridge(pvt->cd.call_token, ast_inet_ntoa(them.sin_addr), mode);
03084 #endif
03085    return 0;
03086 }
03087 
03088 static struct ast_rtp_protocol oh323_rtp = {
03089    .type = "H323",
03090    .get_rtp_info = oh323_get_rtp_peer,
03091    .get_vrtp_info = oh323_get_vrtp_peer,
03092    .set_rtp_peer = oh323_set_rtp_peer,
03093 };
03094 
03095 static enum ast_module_load_result load_module(void)
03096 {
03097    int res;
03098 
03099    h323debug = 0;
03100    sched = sched_context_create();
03101    if (!sched) {
03102       ast_log(LOG_WARNING, "Unable to create schedule context\n");
03103       return AST_MODULE_LOAD_FAILURE;
03104    }
03105    io = io_context_create();
03106    if (!io) {
03107       ast_log(LOG_WARNING, "Unable to create I/O context\n");
03108       return AST_MODULE_LOAD_FAILURE;
03109    }
03110    ast_cli_register(&cli_h323_reload);
03111    ASTOBJ_CONTAINER_INIT(&userl);
03112    ASTOBJ_CONTAINER_INIT(&peerl);
03113    ASTOBJ_CONTAINER_INIT(&aliasl);
03114    res = reload_config(0);
03115    if (res) {
03116       /* No config entry */
03117       ast_log(LOG_NOTICE, "Unload and load chan_h323.so again in order to receive configuration changes.\n");
03118       ast_cli_unregister(&cli_h323_reload);
03119       io_context_destroy(io);
03120       io = NULL;
03121       sched_context_destroy(sched);
03122       sched = NULL;
03123       ASTOBJ_CONTAINER_DESTROY(&userl);
03124       ASTOBJ_CONTAINER_DESTROY(&peerl);
03125       ASTOBJ_CONTAINER_DESTROY(&aliasl);
03126       return AST_MODULE_LOAD_DECLINE;
03127    } else {
03128       /* Make sure we can register our channel type */
03129       if (ast_channel_register(&oh323_tech)) {
03130          ast_log(LOG_ERROR, "Unable to register channel class 'H323'\n");
03131          ast_cli_unregister(&cli_h323_reload);
03132          h323_end_process();
03133          io_context_destroy(io);
03134          sched_context_destroy(sched);
03135 
03136          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03137          ASTOBJ_CONTAINER_DESTROY(&userl);
03138          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03139          ASTOBJ_CONTAINER_DESTROY(&peerl);
03140          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03141          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03142 
03143          return AST_MODULE_LOAD_FAILURE;
03144       }
03145       ast_cli_register_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03146 
03147       ast_rtp_proto_register(&oh323_rtp);
03148 
03149       /* Register our callback functions */
03150       h323_callback_register(setup_incoming_call,
03151                   setup_outgoing_call,
03152                   external_rtp_create,
03153                   setup_rtp_connection,
03154                   cleanup_connection,
03155                   chan_ringing,
03156                   connection_made,
03157                   receive_digit,
03158                   answer_call,
03159                   progress,
03160                   set_dtmf_payload,
03161                   hangup_connection,
03162                   set_local_capabilities,
03163                   set_peer_capabilities);
03164       /* start the h.323 listener */
03165       if (h323_start_listener(h323_signalling_port, bindaddr)) {
03166          ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
03167          ast_rtp_proto_unregister(&oh323_rtp);
03168          ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03169          ast_cli_unregister(&cli_h323_reload);
03170          h323_end_process();
03171          io_context_destroy(io);
03172          sched_context_destroy(sched);
03173 
03174          ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03175          ASTOBJ_CONTAINER_DESTROY(&userl);
03176          ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03177          ASTOBJ_CONTAINER_DESTROY(&peerl);
03178          ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03179          ASTOBJ_CONTAINER_DESTROY(&aliasl);
03180 
03181          return AST_MODULE_LOAD_FAILURE;
03182       }
03183       /* Possibly register with a GK */
03184       if (!gatekeeper_disable) {
03185          if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
03186             ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
03187             gatekeeper_disable = 1;
03188             res = AST_MODULE_LOAD_SUCCESS;
03189          }
03190       }
03191       /* And start the monitor for the first time */
03192       restart_monitor();
03193    }
03194    return res;
03195 }
03196 
03197 static int unload_module(void)
03198 {
03199    struct oh323_pvt *p, *pl;
03200 
03201    /* unregister commands */
03202    ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
03203    ast_cli_unregister(&cli_h323_reload);
03204 
03205    ast_channel_unregister(&oh323_tech);
03206    ast_rtp_proto_unregister(&oh323_rtp);
03207 
03208    if (!ast_mutex_lock(&iflock)) {
03209       /* hangup all interfaces if they have an owner */
03210       p = iflist;
03211       while(p) {
03212          if (p->owner) {
03213             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
03214          }
03215          p = p->next;
03216       }
03217       iflist = NULL;
03218       ast_mutex_unlock(&iflock);
03219    } else {
03220       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03221       return -1;
03222    }
03223    if (!ast_mutex_lock(&monlock)) {
03224       if ((monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
03225          /* this causes a seg, anyone know why? */
03226          if (monitor_thread != pthread_self())
03227             pthread_cancel(monitor_thread);
03228          pthread_kill(monitor_thread, SIGURG);
03229          pthread_join(monitor_thread, NULL);
03230       }
03231       monitor_thread = AST_PTHREADT_STOP;
03232       ast_mutex_unlock(&monlock);
03233    } else {
03234       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
03235       return -1;
03236    }
03237    if (!ast_mutex_lock(&iflock)) {
03238       /* destroy all the interfaces and free their memory */
03239       p = iflist;
03240       while(p) {
03241          pl = p;
03242          p = p->next;
03243          /* free associated memory */
03244          ast_mutex_destroy(&pl->lock);
03245          free(pl);
03246       }
03247       iflist = NULL;
03248       ast_mutex_unlock(&iflock);
03249    } else {
03250       ast_log(LOG_WARNING, "Unable to lock the interface list\n");
03251       return -1;
03252    }
03253    if (!gatekeeper_disable)
03254       h323_gk_urq();
03255    h323_end_process();
03256    if (io)
03257       io_context_destroy(io);
03258    if (sched)
03259       sched_context_destroy(sched);
03260 
03261    ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
03262    ASTOBJ_CONTAINER_DESTROY(&userl);
03263    ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
03264    ASTOBJ_CONTAINER_DESTROY(&peerl);
03265    ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
03266    ASTOBJ_CONTAINER_DESTROY(&aliasl);
03267 
03268    return 0;
03269 }
03270 
03271 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "The NuFone Network's OpenH323 Channel Driver",
03272       .load = load_module,
03273       .unload = unload_module,
03274       .reload = reload,
03275 );

Generated on Mon Mar 31 07:37:57 2008 for Asterisk - the Open Source PBX by  doxygen 1.5.1