sjero.net Git - linphone/blob - coreapi/sal_eXosip2.c

   1 /*
   2 linphone
   3 Copyright (C) 2010  Simon MORLAT (simon.morlat@free.fr)
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18 */
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "sal_eXosip2.h"
  24 #include "private.h"
  25 #include "offeranswer.h"
  26
  27 #ifdef ANDROID
  28 // Necessary to make it linked
  29 static void for_linker() { eXosip_transport_hook_register(NULL); }
  30 #endif
  31 static bool_t call_failure(Sal *sal, eXosip_event_t *ev);
  32
  33 static void text_received(Sal *sal, eXosip_event_t *ev);
  34
  35 static void masquerade_via(osip_message_t *msg, const char *ip, const char *port);
  36 static bool_t fix_message_contact(SalOp *op, osip_message_t *request,osip_message_t *last_answer, bool_t expire_last_contact);
  37 static void update_contact_from_response(SalOp *op, osip_message_t *response);
  38
  39 void _osip_list_set_empty(osip_list_t *l, void (*freefunc)(void*)){
  40         void *data;
  41         while(!osip_list_eol(l,0)) {
  42                 data=osip_list_get(l,0);
  43                 osip_list_remove(l,0);
  44                 if (data) freefunc(data);
  45         }
  46 }
  47
  48 void sal_get_default_local_ip(Sal *sal, int address_family,char *ip, size_t iplen){
  49         if (eXosip_guess_localip(address_family,ip,iplen)<0){
  50                 /*default to something */
  51                 strncpy(ip,address_family==AF_INET6 ? "::1" : "127.0.0.1",iplen);
  52                 ms_error("Could not find default routable ip address !");
  53         }
  54 }
  55
  56
  57 static SalOp * sal_find_call(Sal *sal, int cid){
  58         const MSList *elem;
  59         SalOp *op;
  60         for(elem=sal->calls;elem!=NULL;elem=elem->next){
  61                 op=(SalOp*)elem->data;
  62                 if (op->cid==cid) return op;
  63         }
  64         return NULL;
  65 }
  66
  67 static void sal_add_call(Sal *sal, SalOp *op){
  68         sal->calls=ms_list_append(sal->calls,op);
  69 }
  70
  71 static void sal_remove_call(Sal *sal, SalOp *op){
  72         sal->calls=ms_list_remove(sal->calls, op);
  73 }
  74
  75 static SalOp * sal_find_register(Sal *sal, int rid){
  76         const MSList *elem;
  77         SalOp *op;
  78         for(elem=sal->registers;elem!=NULL;elem=elem->next){
  79                 op=(SalOp*)elem->data;
  80                 if (op->rid==rid) return op;
  81         }
  82         return NULL;
  83 }
  84
  85 static void sal_add_register(Sal *sal, SalOp *op){
  86         sal->registers=ms_list_append(sal->registers,op);
  87 }
  88
  89 static void sal_remove_register(Sal *sal, int rid){
  90         MSList *elem;
  91         SalOp *op;
  92         for(elem=sal->registers;elem!=NULL;elem=elem->next){
  93                 op=(SalOp*)elem->data;
  94                 if (op->rid==rid) {
  95                         sal->registers=ms_list_remove_link(sal->registers,elem);
  96                         return;
  97                 }
  98         }
  99 }
 100
 101 static SalOp * sal_find_other(Sal *sal, osip_message_t *response){
 102         const MSList *elem;
 103         SalOp *op;
 104         osip_call_id_t *callid=osip_message_get_call_id(response);
 105         if (callid==NULL) {
 106                 ms_error("There is no call-id in this response !");
 107                 return NULL;
 108         }
 109         for(elem=sal->other_transactions;elem!=NULL;elem=elem->next){
 110                 op=(SalOp*)elem->data;
 111                 if (osip_call_id_match(callid,op->call_id)==0) return op;
 112         }
 113         return NULL;
 114 }
 115
 116 void sal_add_other(Sal *sal, SalOp *op, osip_message_t *request){
 117         osip_call_id_t *callid=osip_message_get_call_id(request);
 118         if (callid==NULL) {
 119                 ms_error("There is no call id in the request !");
 120                 return;
 121         }
 122         osip_call_id_clone(callid,&op->call_id);
 123         sal->other_transactions=ms_list_append(sal->other_transactions,op);
 124 }
 125
 126 static void sal_remove_other(Sal *sal, SalOp *op){
 127         sal->other_transactions=ms_list_remove(sal->other_transactions,op);
 128 }
 129
 130
 131 static void sal_add_pending_auth(Sal *sal, SalOp *op){
 132         sal->pending_auths=ms_list_append(sal->pending_auths,op);
 133 }
 134
 135
 136 static void sal_remove_pending_auth(Sal *sal, SalOp *op){
 137         sal->pending_auths=ms_list_remove(sal->pending_auths,op);
 138 }
 139
 140 void sal_exosip_fix_route(SalOp *op){
 141         if (sal_op_get_route(op)!=NULL){
 142                 osip_route_t *rt=NULL;
 143                 osip_uri_param_t *lr_param=NULL;
 144
 145                 osip_route_init(&rt);
 146                 if (osip_route_parse(rt,sal_op_get_route(op))<0){
 147                         ms_warning("Bad route  %s!",sal_op_get_route(op));
 148                         sal_op_set_route(op,NULL);
 149                 }else{
 150                         /* check if the lr parameter is set , if not add it */
 151                         osip_uri_uparam_get_byname(rt->url, "lr", &lr_param);
 152                         if (lr_param==NULL){
 153                                 char *tmproute;
 154                                 osip_uri_uparam_add(rt->url,osip_strdup("lr"),NULL);
 155                                 osip_route_to_str(rt,&tmproute);
 156                                 sal_op_set_route(op,tmproute);
 157                                 osip_free(tmproute);
 158                         }
 159                 }
 160                 osip_route_free(rt);
 161         }
 162 }
 163
 164 SalOp * sal_op_new(Sal *sal){
 165         SalOp *op=ms_new0(SalOp,1);
 166         __sal_op_init(op,sal);
 167         op->cid=op->did=op->tid=op->rid=op->nid=op->sid=-1;
 168         op->result=NULL;
 169         op->supports_session_timers=FALSE;
 170         op->sdp_offering=TRUE;
 171         op->pending_auth=NULL;
 172         op->sdp_answer=NULL;
 173         op->reinvite=FALSE;
 174         op->call_id=NULL;
 175         op->replaces=NULL;
 176         op->referred_by=NULL;
 177         op->masquerade_via=FALSE;
 178         op->auto_answer_asked=FALSE;
 179         op->auth_info=NULL;
 180         op->terminated=FALSE;
 181         return op;
 182 }
 183
 184 bool_t sal_call_autoanswer_asked(SalOp *op)
 185 {
 186         return op->auto_answer_asked;
 187 }
 188
 189 void sal_op_release(SalOp *op){
 190         if (op->sdp_answer)
 191                 sdp_message_free(op->sdp_answer);
 192         if (op->pending_auth)
 193                 eXosip_event_free(op->pending_auth);
 194         if (op->rid!=-1){
 195                 sal_remove_register(op->base.root,op->rid);
 196                 eXosip_register_remove(op->rid);
 197         }
 198         if (op->cid!=-1){
 199                 ms_message("Cleaning cid %i",op->cid);
 200                 sal_remove_call(op->base.root,op);
 201         }
 202         if (op->sid!=-1){
 203                 sal_remove_out_subscribe(op->base.root,op);
 204         }
 205         if (op->nid!=-1){
 206                 sal_remove_in_subscribe(op->base.root,op);
 207                 if (op->call_id)
 208                         osip_call_id_free(op->call_id);
 209                 op->call_id=NULL;
 210         }
 211         if (op->pending_auth){
 212                 sal_remove_pending_auth(op->base.root,op);
 213         }
 214         if (op->result)
 215                 sal_media_description_unref(op->result);
 216         if (op->call_id){
 217                 sal_remove_other(op->base.root,op);
 218                 osip_call_id_free(op->call_id);
 219         }
 220         if (op->replaces){
 221                 ms_free(op->replaces);
 222         }
 223         if (op->referred_by){
 224                 ms_free(op->referred_by);
 225         }
 226         if (op->auth_info) {
 227                 sal_auth_info_delete(op->auth_info);
 228         }
 229         __sal_op_free(op);
 230 }
 231
 232 static void _osip_trace_func(char *fi, int li, osip_trace_level_t level, char *chfr, va_list ap){
 233         int ortp_level=ORTP_DEBUG;
 234         switch(level){
 235                 case OSIP_INFO1:
 236                 case OSIP_INFO2:
 237                 case OSIP_INFO3:
 238                 case OSIP_INFO4:
 239                         ortp_level=ORTP_MESSAGE;
 240                         break;
 241                 case OSIP_WARNING:
 242                         ortp_level=ORTP_WARNING;
 243                         break;
 244                 case OSIP_ERROR:
 245                 case OSIP_BUG:
 246                         ortp_level=ORTP_ERROR;
 247                         break;
 248                 case OSIP_FATAL:
 249                         ortp_level=ORTP_FATAL;
 250                         break;
 251                 case END_TRACE_LEVEL:
 252                         break;
 253         }
 254         if (ortp_log_level_enabled(level)){
 255                 int len=strlen(chfr);
 256                 char *chfrdup=ortp_strdup(chfr);
 257                 /*need to remove endline*/
 258                 if (len>1){
 259                         if (chfrdup[len-1]=='\n')
 260                                 chfrdup[len-1]='\0';
 261                         if (chfrdup[len-2]=='\r')
 262                                 chfrdup[len-2]='\0';
 263                 }
 264                 ortp_logv(ortp_level,chfrdup,ap);
 265                 ortp_free(chfrdup);
 266         }
 267 }
 268
 269
 270 Sal * sal_init(){
 271         static bool_t firsttime=TRUE;
 272         Sal *sal;
 273         if (firsttime){
 274                 osip_trace_initialize_func (OSIP_INFO4,&_osip_trace_func);
 275                 firsttime=FALSE;
 276         }
 277         eXosip_init();
 278         sal=ms_new0(Sal,1);
 279         sal->keepalive_period=30;
 280         sal->double_reg=TRUE;
 281         sal->use_rports=TRUE;
 282         sal->use_101=TRUE;
 283         sal->reuse_authorization=FALSE;
 284         sal->rootCa = 0;
 285         sal->verify_server_certs=TRUE;
 286         sal->expire_old_contact=FALSE;
 287         return sal;
 288 }
 289
 290 void sal_uninit(Sal* sal){
 291         eXosip_quit();
 292         if (sal->rootCa)
 293                 ms_free(sal->rootCa);
 294         ms_free(sal);
 295 }
 296
 297 void sal_set_user_pointer(Sal *sal, void *user_data){
 298         sal->up=user_data;
 299 }
 300
 301 void *sal_get_user_pointer(const Sal *sal){
 302         return sal->up;
 303 }
 304
 305 static void unimplemented_stub(){
 306         ms_warning("Unimplemented SAL callback");
 307 }
 308
 309 void sal_set_callbacks(Sal *ctx, const SalCallbacks *cbs){
 310         memcpy(&ctx->callbacks,cbs,sizeof(*cbs));
 311         if (ctx->callbacks.call_received==NULL)
 312                 ctx->callbacks.call_received=(SalOnCallReceived)unimplemented_stub;
 313         if (ctx->callbacks.call_ringing==NULL)
 314                 ctx->callbacks.call_ringing=(SalOnCallRinging)unimplemented_stub;
 315         if (ctx->callbacks.call_accepted==NULL)
 316                 ctx->callbacks.call_accepted=(SalOnCallAccepted)unimplemented_stub;
 317         if (ctx->callbacks.call_failure==NULL)
 318                 ctx->callbacks.call_failure=(SalOnCallFailure)unimplemented_stub;
 319         if (ctx->callbacks.call_terminated==NULL)
 320                 ctx->callbacks.call_terminated=(SalOnCallTerminated)unimplemented_stub;
 321         if (ctx->callbacks.call_released==NULL)
 322                 ctx->callbacks.call_released=(SalOnCallReleased)unimplemented_stub;
 323         if (ctx->callbacks.call_updating==NULL)
 324                 ctx->callbacks.call_updating=(SalOnCallUpdating)unimplemented_stub;
 325         if (ctx->callbacks.auth_requested==NULL)
 326                 ctx->callbacks.auth_requested=(SalOnAuthRequested)unimplemented_stub;
 327         if (ctx->callbacks.auth_success==NULL)
 328                 ctx->callbacks.auth_success=(SalOnAuthSuccess)unimplemented_stub;
 329         if (ctx->callbacks.register_success==NULL)
 330                 ctx->callbacks.register_success=(SalOnRegisterSuccess)unimplemented_stub;
 331         if (ctx->callbacks.register_failure==NULL)
 332                 ctx->callbacks.register_failure=(SalOnRegisterFailure)unimplemented_stub;
 333         if (ctx->callbacks.dtmf_received==NULL)
 334                 ctx->callbacks.dtmf_received=(SalOnDtmfReceived)unimplemented_stub;
 335         if (ctx->callbacks.notify==NULL)
 336                 ctx->callbacks.notify=(SalOnNotify)unimplemented_stub;
 337         if (ctx->callbacks.notify_presence==NULL)
 338                 ctx->callbacks.notify_presence=(SalOnNotifyPresence)unimplemented_stub;
 339         if (ctx->callbacks.subscribe_received==NULL)
 340                 ctx->callbacks.subscribe_received=(SalOnSubscribeReceived)unimplemented_stub;
 341         if (ctx->callbacks.text_received==NULL)
 342                 ctx->callbacks.text_received=(SalOnTextReceived)unimplemented_stub;
 343         if (ctx->callbacks.ping_reply==NULL)
 344                 ctx->callbacks.ping_reply=(SalOnPingReply)unimplemented_stub;
 345 }
 346
 347 int sal_unlisten_ports(Sal *ctx){
 348         if (ctx->running){
 349                 eXosip_quit();
 350                 eXosip_init();
 351                 ctx->running=FALSE;
 352         }
 353         return 0;
 354 }
 355
 356 int sal_reset_transports(Sal *ctx){
 357 #ifdef HAVE_EXOSIP_RESET_TRANSPORTS
 358         if (ctx->running){
 359                 ms_message("Exosip transports reset.");
 360                 eXosip_reset_transports();
 361         }
 362         return 0;
 363 #else
 364         ms_warning("sal_reset_transports() not implemented in this version.");
 365         return -1;
 366 #endif
 367 }
 368
 369
 370 static void set_tls_options(Sal *ctx){
 371         if (ctx->rootCa) {
 372                 eXosip_tls_ctx_t tlsCtx;
 373                 memset(&tlsCtx, 0, sizeof(tlsCtx));
 374                 snprintf(tlsCtx.root_ca_cert, sizeof(tlsCtx.client.cert), "%s", ctx->rootCa);
 375                 eXosip_set_tls_ctx(&tlsCtx);
 376         }
 377 #ifdef HAVE_EXOSIP_TLS_VERIFY_CERTIFICATE
 378         eXosip_tls_verify_certificate(ctx->verify_server_certs);
 379 #endif
 380 }
 381
 382 int sal_listen_port(Sal *ctx, const char *addr, int port, SalTransport tr, int is_secure){
 383         int err;
 384         bool_t ipv6;
 385         int proto=IPPROTO_UDP;
 386         int keepalive = ctx->keepalive_period;
 387
 388         switch (tr) {
 389         case SalTransportUDP:
 390                 proto=IPPROTO_UDP;
 391                 eXosip_set_option (EXOSIP_OPT_UDP_KEEP_ALIVE, &keepalive);
 392                 break;
 393         case SalTransportTCP:
 394         case SalTransportTLS:
 395                 proto= IPPROTO_TCP;
 396                         keepalive=-1;
 397                 eXosip_set_option (EXOSIP_OPT_UDP_KEEP_ALIVE,&keepalive);
 398                 set_tls_options(ctx);
 399                 break;
 400         default:
 401                 ms_warning("unexpected proto, using datagram");
 402         }
 403         /*see if it looks like an IPv6 address*/
 404         int use_rports = ctx->use_rports; // Copy char to int to avoid bad alignment
 405         eXosip_set_option(EXOSIP_OPT_USE_RPORT,&use_rports);
 406         int dont_use_101 = !ctx->use_101; // Copy char to int to avoid bad alignment
 407         eXosip_set_option(EXOSIP_OPT_DONT_SEND_101,&dont_use_101);
 408
 409         ipv6=strchr(addr,':')!=NULL;
 410         eXosip_enable_ipv6(ipv6);
 411
 412         if (is_secure && tr == SalTransportUDP){
 413                 ms_fatal("SIP over DTLS is not supported yet.");
 414                 return -1;
 415         }
 416         err=eXosip_listen_addr(proto, addr, port, ipv6 ?  PF_INET6 : PF_INET, is_secure);
 417         ctx->running=TRUE;
 418         return err;
 419 }
 420
 421 ortp_socket_t sal_get_socket(Sal *ctx){
 422 #ifdef HAVE_EXOSIP_GET_SOCKET
 423         return eXosip_get_socket(IPPROTO_UDP);
 424 #else
 425         ms_warning("Sorry, eXosip does not have eXosip_get_socket() method");
 426         return -1;
 427 #endif
 428 }
 429
 430 void sal_set_user_agent(Sal *ctx, const char *user_agent){
 431         eXosip_set_user_agent(user_agent);
 432 }
 433
 434 void sal_use_session_timers(Sal *ctx, int expires){
 435         ctx->session_expires=expires;
 436 }
 437
 438 void sal_use_one_matching_codec_policy(Sal *ctx, bool_t one_matching_codec){
 439         ctx->one_matching_codec=one_matching_codec;
 440 }
 441
 442 MSList *sal_get_pending_auths(Sal *sal){
 443         return ms_list_copy(sal->pending_auths);
 444 }
 445
 446 void sal_use_double_registrations(Sal *ctx, bool_t enabled){
 447         ctx->double_reg=enabled;
 448 }
 449
 450 void sal_expire_old_registration_contacts(Sal *ctx, bool_t enabled){
 451         ctx->expire_old_contact=enabled;
 452 }
 453
 454 void sal_use_rport(Sal *ctx, bool_t use_rports){
 455         ctx->use_rports=use_rports;
 456 }
 457 void sal_use_101(Sal *ctx, bool_t use_101){
 458         ctx->use_101=use_101;
 459 }
 460
 461 void sal_set_root_ca(Sal* ctx, const char* rootCa) {
 462         if (ctx->rootCa)
 463                 ms_free(ctx->rootCa);
 464         ctx->rootCa = ms_strdup(rootCa);
 465         set_tls_options(ctx);
 466 }
 467
 468 void sal_verify_server_certificates(Sal *ctx, bool_t verify){
 469         ctx->verify_server_certs=verify;
 470 #ifdef HAVE_EXOSIP_TLS_VERIFY_CERTIFICATE
 471         eXosip_tls_verify_certificate(verify);
 472 #endif
 473 }
 474
 475 static int extract_received_rport(osip_message_t *msg, const char **received, int *rportval,SalTransport* transport){
 476         osip_via_t *via=NULL;
 477         osip_generic_param_t *param=NULL;
 478         const char *rport=NULL;
 479
 480         *rportval=5060;
 481         *received=NULL;
 482         osip_message_get_via(msg,0,&via);
 483         if (!via) {
 484                 ms_warning("extract_received_rport(): no via.");
 485                 return -1;
 486         }
 487
 488         *transport = sal_transport_parse(via->protocol);
 489
 490         if (via->port && via->port[0]!='\0')
 491                 *rportval=atoi(via->port);
 492
 493         osip_via_param_get_byname(via,"rport",&param);
 494         if (param) {
 495                 rport=param->gvalue;
 496                 if (rport && rport[0]!='\0') *rportval=atoi(rport);
 497                 *received=via->host;
 498         }
 499         param=NULL;
 500         osip_via_param_get_byname(via,"received",&param);
 501         if (param) *received=param->gvalue;
 502
 503         if (rport==NULL && *received==NULL){
 504                 ms_warning("extract_received_rport(): no rport and no received parameters.");
 505                 return -1;
 506         }
 507         return 0;
 508 }
 509
 510 static void set_sdp(osip_message_t *sip,sdp_message_t *msg){
 511         int sdplen;
 512         char clen[10];
 513         char *sdp=NULL;
 514         sdp_message_to_str(msg,&sdp);
 515         sdplen=strlen(sdp);
 516         snprintf(clen,sizeof(clen),"%i",sdplen);
 517         osip_message_set_body(sip,sdp,sdplen);
 518         osip_message_set_content_type(sip,"application/sdp");
 519         osip_message_set_content_length(sip,clen);
 520         osip_free(sdp);
 521 }
 522
 523 static void set_sdp_from_desc(osip_message_t *sip, const SalMediaDescription *desc){
 524         sdp_message_t *msg=media_description_to_sdp(desc);
 525         if (msg==NULL) {
 526                 ms_error("Fail to print sdp message !");
 527                 return;
 528         }
 529         set_sdp(sip,msg);
 530         sdp_message_free(msg);
 531 }
 532
 533 static void sdp_process(SalOp *h){
 534         ms_message("Doing SDP offer/answer process of type %s",h->sdp_offering ? "outgoing" : "incoming");
 535         if (h->result){
 536                 sal_media_description_unref(h->result);
 537         }
 538         h->result=sal_media_description_new();
 539         if (h->sdp_offering){
 540                 offer_answer_initiate_outgoing(h->base.local_media,h->base.remote_media,h->result);
 541         }else{
 542                 int i;
 543                 if (h->sdp_answer){
 544                         sdp_message_free(h->sdp_answer);
 545                 }
 546                 offer_answer_initiate_incoming(h->base.local_media,h->base.remote_media,h->result,h->base.root->one_matching_codec);
 547                 h->sdp_answer=media_description_to_sdp(h->result);
 548                 /*once we have generated the SDP answer, we modify the result description for processing by the upper layer.
 549                  It should contains media parameters constraint from the remote offer, not our response*/
 550                 strcpy(h->result->addr,h->base.remote_media->addr);
 551                 h->result->bandwidth=h->base.remote_media->bandwidth;
 552
 553                 for(i=0;i<h->result->nstreams;++i){
 554                         if (h->result->streams[i].rtp_port>0){
 555                                 strcpy(h->result->streams[i].rtp_addr,h->base.remote_media->streams[i].rtp_addr);
 556                                 strcpy(h->result->streams[i].rtcp_addr,h->base.remote_media->streams[i].rtcp_addr);
 557                                 h->result->streams[i].ptime=h->base.remote_media->streams[i].ptime;
 558                                 h->result->streams[i].bandwidth=h->base.remote_media->streams[i].bandwidth;
 559                                 h->result->streams[i].rtp_port=h->base.remote_media->streams[i].rtp_port;
 560                                 h->result->streams[i].rtcp_port=h->base.remote_media->streams[i].rtcp_port;
 561
 562                                 if (h->result->streams[i].proto == SalProtoRtpSavp) {
 563                                         h->result->streams[i].crypto[0] = h->base.remote_media->streams[i].crypto[0];
 564                                 }
 565                         }
 566                 }
 567         }
 568
 569 }
 570
 571 int sal_call_is_offerer(const SalOp *h){
 572         return h->sdp_offering;
 573 }
 574
 575 int sal_call_set_local_media_description(SalOp *h, SalMediaDescription *desc){
 576         if (desc)
 577                 sal_media_description_ref(desc);
 578         if (h->base.local_media)
 579                 sal_media_description_unref(h->base.local_media);
 580         h->base.local_media=desc;
 581         if (h->base.remote_media){
 582                 /*case of an incoming call where we modify the local capabilities between the time
 583                  * the call is ringing and it is accepted (for example if you want to accept without video*/
 584                 /*reset the sdp answer so that it is computed again*/
 585                 if (h->sdp_answer){
 586                         sdp_message_free(h->sdp_answer);
 587                         h->sdp_answer=NULL;
 588                 }
 589         }
 590         return 0;
 591 }
 592
 593 int sal_call(SalOp *h, const char *from, const char *to){
 594         int err;
 595         const char *route;
 596         osip_message_t *invite=NULL;
 597         sal_op_set_from(h,from);
 598         sal_op_set_to(h,to);
 599         sal_exosip_fix_route(h);
 600
 601         h->terminated = FALSE;
 602
 603         route = sal_op_get_route(h);
 604         err=eXosip_call_build_initial_invite(&invite,to,from,route,"Phone call");
 605         if (err!=0){
 606                 ms_error("Could not create call. Error %d (from=%s to=%s route=%s)",
 607                                 err, from, to, route);
 608                 return -1;
 609         }
 610         osip_message_set_allow(invite, "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO");
 611         if (h->base.contact){
 612                 _osip_list_set_empty(&invite->contacts,(void (*)(void*))osip_contact_free);
 613                 osip_message_set_contact(invite,h->base.contact);
 614         }
 615         if (h->base.root->session_expires!=0){
 616                 osip_message_set_header(invite, "Session-expires", "200");
 617                 osip_message_set_supported(invite, "timer");
 618         }
 619         if (h->base.local_media){
 620                 h->sdp_offering=TRUE;
 621                 set_sdp_from_desc(invite,h->base.local_media);
 622         }else h->sdp_offering=FALSE;
 623         if (h->replaces){
 624                 osip_message_set_header(invite,"Replaces",h->replaces);
 625                 if (h->referred_by)
 626                         osip_message_set_header(invite,"Referred-By",h->referred_by);
 627         }
 628
 629         eXosip_lock();
 630         err=eXosip_call_send_initial_invite(invite);
 631         eXosip_unlock();
 632         h->cid=err;
 633         if (err<0){
 634                 ms_error("Fail to send invite ! Error code %d", err);
 635                 return -1;
 636         }else{
 637                 sal_add_call(h->base.root,h);
 638         }
 639         return 0;
 640 }
 641
 642 int sal_call_notify_ringing(SalOp *h, bool_t early_media){
 643         osip_message_t *msg;
 644
 645         /*if early media send also 180 and 183 */
 646         if (early_media){
 647                 msg=NULL;
 648                 eXosip_lock();
 649                 eXosip_call_build_answer(h->tid,183,&msg);
 650                 if (msg){
 651                         sdp_process(h);
 652                         if (h->sdp_answer){
 653                                 set_sdp(msg,h->sdp_answer);
 654                                 sdp_message_free(h->sdp_answer);
 655                                 h->sdp_answer=NULL;
 656                         }
 657                         eXosip_call_send_answer(h->tid,183,msg);
 658                 }
 659                 eXosip_unlock();
 660         }else{
 661                 eXosip_lock();
 662                 eXosip_call_send_answer(h->tid,180,NULL);
 663                 eXosip_unlock();
 664         }
 665         return 0;
 666 }
 667
 668 int sal_call_accept(SalOp * h){
 669         osip_message_t *msg;
 670         const char *contact=sal_op_get_contact(h);
 671         /* sends a 200 OK */
 672         int err=eXosip_call_build_answer(h->tid,200,&msg);
 673         if (err<0 || msg==NULL){
 674                 ms_error("Fail to build answer for call: err=%i",err);
 675                 return -1;
 676         }
 677         if (h->base.root->session_expires!=0){
 678                 if (h->supports_session_timers) osip_message_set_supported(msg, "timer");
 679         }
 680
 681         if (contact) {
 682                 _osip_list_set_empty(&msg->contacts,(void (*)(void*))osip_contact_free);
 683                 osip_message_set_contact(msg,contact);
 684         }
 685
 686         if (h->base.local_media){
 687                 /*this is the case where we received an invite without SDP*/
 688                 if (h->sdp_offering) {
 689                         set_sdp_from_desc(msg,h->base.local_media);
 690                 }else{
 691                         if (h->sdp_answer==NULL) sdp_process(h);
 692                         if (h->sdp_answer){
 693                                 set_sdp(msg,h->sdp_answer);
 694                                 sdp_message_free(h->sdp_answer);
 695                                 h->sdp_answer=NULL;
 696                         }
 697                 }
 698         }else{
 699                 ms_error("You are accepting a call but not defined any media capabilities !");
 700         }
 701         eXosip_call_send_answer(h->tid,200,msg);
 702         return 0;
 703 }
 704
 705 int sal_call_decline(SalOp *h, SalReason reason, const char *redirect){
 706         if (reason==SalReasonBusy){
 707                 eXosip_lock();
 708                 eXosip_call_send_answer(h->tid,486,NULL);
 709                 eXosip_unlock();
 710         }
 711         else if (reason==SalReasonTemporarilyUnavailable){
 712                 eXosip_lock();
 713                 eXosip_call_send_answer(h->tid,480,NULL);
 714                 eXosip_unlock();
 715         }else if (reason==SalReasonDoNotDisturb){
 716                 eXosip_lock();
 717                 eXosip_call_send_answer(h->tid,600,NULL);
 718                 eXosip_unlock();
 719         }else if (reason==SalReasonMedia){
 720                 eXosip_lock();
 721                 eXosip_call_send_answer(h->tid,415,NULL);
 722                 eXosip_unlock();
 723         }else if (redirect!=NULL && reason==SalReasonRedirect){
 724                 osip_message_t *msg;
 725                 int code;
 726                 if (strstr(redirect,"sip:")!=0) code=302;
 727                 else code=380;
 728                 eXosip_lock();
 729                 eXosip_call_build_answer(h->tid,code,&msg);
 730                 osip_message_set_contact(msg,redirect);
 731                 eXosip_call_send_answer(h->tid,code,msg);
 732                 eXosip_unlock();
 733         }else sal_call_terminate(h);
 734         return 0;
 735 }
 736
 737 SalMediaDescription * sal_call_get_remote_media_description(SalOp *h){
 738         return h->base.remote_media;
 739 }
 740
 741 SalMediaDescription * sal_call_get_final_media_description(SalOp *h){
 742         if (h->base.local_media && h->base.remote_media && !h->result){
 743                 sdp_process(h);
 744         }
 745         return h->result;
 746 }
 747
 748 int sal_call_set_referer(SalOp *h, SalOp *refered_call){
 749         if (refered_call->replaces)
 750                 h->replaces=ms_strdup(refered_call->replaces);
 751         if (refered_call->referred_by)
 752                 h->referred_by=ms_strdup(refered_call->referred_by);
 753         return 0;
 754 }
 755
 756 static int send_notify_for_refer(int did, const char *sipfrag){
 757         osip_message_t *msg;
 758         eXosip_lock();
 759         eXosip_call_build_notify(did,EXOSIP_SUBCRSTATE_ACTIVE,&msg);
 760         if (msg==NULL){
 761                 eXosip_unlock();
 762                 ms_warning("Could not build NOTIFY for refer.");
 763                 return -1;
 764         }
 765         osip_message_set_content_type(msg,"message/sipfrag");
 766         osip_message_set_header(msg,"Event","refer");
 767         osip_message_set_body(msg,sipfrag,strlen(sipfrag));
 768         eXosip_call_send_request(did,msg);
 769         eXosip_unlock();
 770         return 0;
 771 }
 772
 773 /* currently only support to notify trying and 200Ok*/
 774 int sal_call_notify_refer_state(SalOp *h, SalOp *newcall){
 775         if (newcall==NULL){
 776                 /* in progress*/
 777                 send_notify_for_refer(h->did,"SIP/2.0 100 Trying\r\n");
 778         }
 779         else if (newcall->cid!=-1){
 780                 if (newcall->did==-1){
 781                         /* not yet established*/
 782                         if (!newcall->terminated){
 783                                 /* in progress*/
 784                                 send_notify_for_refer(h->did,"SIP/2.0 100 Trying\r\n");
 785                         }
 786                 }else{
 787                         if (!newcall->terminated){
 788                                 if (send_notify_for_refer(h->did,"SIP/2.0 200 Ok\r\n")==-1){
 789                                         /* we need previous notify transaction to complete, so buffer the request for later*/
 790                                         h->sipfrag_pending="SIP/2.0 200 Ok\r\n";
 791                                 }
 792                         }
 793                 }
 794         }
 795         return 0;
 796 }
 797
 798 int sal_ping(SalOp *op, const char *from, const char *to){
 799         osip_message_t *options=NULL;
 800
 801         sal_op_set_from(op,from);
 802         sal_op_set_to(op,to);
 803         sal_exosip_fix_route(op);
 804
 805         eXosip_options_build_request (&options, sal_op_get_to(op),
 806                         sal_op_get_from(op),sal_op_get_route(op));
 807         if (options){
 808                 if (op->base.root->session_expires!=0){
 809                         osip_message_set_header(options, "Session-expires", "200");
 810                         osip_message_set_supported(options, "timer");
 811                 }
 812                 sal_add_other(sal_op_get_sal(op),op,options);
 813                 return eXosip_options_send_request(options);
 814         }
 815         return -1;
 816 }
 817
 818 int sal_call_refer(SalOp *h, const char *refer_to){
 819         osip_message_t *msg=NULL;
 820         int err=0;
 821         eXosip_lock();
 822         eXosip_call_build_refer(h->did,refer_to, &msg);
 823         if (msg) err=eXosip_call_send_request(h->did, msg);
 824         else err=-1;
 825         eXosip_unlock();
 826         return err;
 827 }
 828
 829 int sal_call_refer_with_replaces(SalOp *h, SalOp *other_call_h){
 830         osip_message_t *msg=NULL;
 831         char referto[256]={0};
 832         int err=0;
 833         eXosip_lock();
 834         if (eXosip_call_get_referto(other_call_h->did,referto,sizeof(referto)-1)!=0){
 835                 ms_error("eXosip_call_get_referto() failed for did=%i",other_call_h->did);
 836                 eXosip_unlock();
 837                 return -1;
 838         }
 839         eXosip_call_build_refer(h->did,referto, &msg);
 840         osip_message_set_header(msg,"Referred-By",h->base.from);
 841         if (msg) err=eXosip_call_send_request(h->did, msg);
 842         else err=-1;
 843         eXosip_unlock();
 844         return err;
 845 }
 846
 847 SalOp *sal_call_get_replaces(SalOp *h){
 848         if (h!=NULL && h->replaces!=NULL){
 849                 int cid;
 850                 eXosip_lock();
 851                 cid=eXosip_call_find_by_replaces(h->replaces);
 852                 eXosip_unlock();
 853                 if (cid>0){
 854                         SalOp *ret=sal_find_call(h->base.root,cid);
 855                         return ret;
 856                 }
 857         }
 858         return NULL;
 859 }
 860
 861 int sal_call_send_dtmf(SalOp *h, char dtmf){
 862         osip_message_t *msg=NULL;
 863         char dtmf_body[128];
 864         char clen[10];
 865
 866         eXosip_lock();
 867         eXosip_call_build_info(h->did,&msg);
 868         if (msg){
 869                 snprintf(dtmf_body, sizeof(dtmf_body), "Signal=%c\r\nDuration=250\r\n", dtmf);
 870                 osip_message_set_body(msg,dtmf_body,strlen(dtmf_body));
 871                 osip_message_set_content_type(msg,"application/dtmf-relay");
 872                 snprintf(clen,sizeof(clen),"%lu",(unsigned long)strlen(dtmf_body));
 873                 osip_message_set_content_length(msg,clen);
 874                 eXosip_call_send_request(h->did,msg);
 875         }
 876         eXosip_unlock();
 877         return 0;
 878 }
 879
 880 static void push_auth_to_exosip(const SalAuthInfo *info){
 881         const char *userid;
 882         if (info->userid==NULL || info->userid[0]=='\0') userid=info->username;
 883         else userid=info->userid;
 884         ms_message("Authentication info for username [%s], id[%s], realm [%s] added to eXosip", info->username,userid, info->realm);
 885         eXosip_add_authentication_info (info->username,userid,
 886                                   info->password, NULL,info->realm);
 887 }
 888 /*
 889  * Just for symmetry ;-)
 890  */
 891 static void pop_auth_from_exosip() {
 892         eXosip_clear_authentication_info();
 893 }
 894
 895 int sal_call_terminate(SalOp *h){
 896         int err;
 897         if (h == NULL) return -1;
 898         if (h->auth_info) push_auth_to_exosip(h->auth_info);
 899         eXosip_lock();
 900         err=eXosip_call_terminate(h->cid,h->did);
 901         eXosip_unlock();
 902         if (!h->base.root->reuse_authorization) pop_auth_from_exosip();
 903         if (err!=0){
 904                 ms_warning("Exosip could not terminate the call: cid=%i did=%i", h->cid,h->did);
 905         }
 906         h->terminated=TRUE;
 907         return 0;
 908 }
 909
 910 void sal_op_authenticate(SalOp *h, const SalAuthInfo *info){
 911         if (h->terminated) return;
 912     if (h->pending_auth){
 913                 push_auth_to_exosip(info);
 914
 915         /*FIXME exosip does not take into account this update register message*/
 916         /*
 917         if (fix_message_contact(h, h->pending_auth->request,h->pending_auth->response)) {
 918
 919         };
 920         */
 921                 update_contact_from_response(h,h->pending_auth->response);
 922                 eXosip_lock();
 923                 eXosip_default_action(h->pending_auth);
 924                 eXosip_unlock();
 925                 ms_message("eXosip_default_action() done");
 926                 if (!h->base.root->reuse_authorization) pop_auth_from_exosip();
 927
 928                 if (h->auth_info) sal_auth_info_delete(h->auth_info); /*if already exist*/
 929                 h->auth_info=sal_auth_info_clone(info); /*store auth info for subsequent request*/
 930         }
 931 }
 932 void sal_op_cancel_authentication(SalOp *h) {
 933         if (h->rid >0) {
 934                 sal_op_get_sal(h)->callbacks.register_failure(h,SalErrorFailure, SalReasonForbidden,_("Authentication failure"));
 935         } else if (h->cid >0) {
 936                 sal_op_get_sal(h)->callbacks.call_failure(h,SalErrorFailure, SalReasonForbidden,_("Authentication failure"),0);
 937         } else {
 938                 ms_warning("Auth failure not handled");
 939         }
 940
 941 }
 942 static void set_network_origin(SalOp *op, osip_message_t *req){
 943         const char *received=NULL;
 944         int rport=5060;
 945         char origin[64]={0};
 946     SalTransport transport;
 947         if (extract_received_rport(req,&received,&rport,&transport)!=0){
 948                 osip_via_t *via=NULL;
 949                 char *tmp;
 950                 osip_message_get_via(req,0,&via);
 951                 received=osip_via_get_host(via);
 952                 tmp=osip_via_get_port(via);
 953                 if (tmp) rport=atoi(tmp);
 954         }
 955     if (transport != SalTransportUDP) {
 956         snprintf(origin,sizeof(origin)-1,"sip:%s:%i",received,rport);
 957     } else {
 958        snprintf(origin,sizeof(origin)-1,"sip:%s:%i;transport=%s",received,rport,sal_transport_to_string(transport));
 959     }
 960         __sal_op_set_network_origin(op,origin);
 961 }
 962
 963 static void set_remote_ua(SalOp* op, osip_message_t *req){
 964         if (op->base.remote_ua==NULL){
 965                 osip_header_t *h=NULL;
 966                 osip_message_get_user_agent(req,0,&h);
 967                 if (h){
 968                         op->base.remote_ua=ms_strdup(h->hvalue);
 969                 }
 970         }
 971 }
 972
 973 static void set_replaces(SalOp *op, osip_message_t *req){
 974         osip_header_t *h=NULL;
 975
 976         if (op->replaces){
 977                 ms_free(op->replaces);
 978                 op->replaces=NULL;
 979         }
 980         osip_message_header_get_byname(req,"replaces",0,&h);
 981         if (h){
 982                 if (h->hvalue && h->hvalue[0]!='\0'){
 983                         op->replaces=ms_strdup(h->hvalue);
 984                 }
 985         }
 986 }
 987
 988 static SalOp *find_op(Sal *sal, eXosip_event_t *ev){
 989         if (ev->cid>0){
 990                 return sal_find_call(sal,ev->cid);
 991         }
 992         if (ev->rid>0){
 993                 return sal_find_register(sal,ev->rid);
 994         }
 995         if (ev->sid>0){
 996                 return sal_find_out_subscribe(sal,ev->sid);
 997         }
 998         if (ev->nid>0){
 999                 return sal_find_in_subscribe(sal,ev->nid);
1000         }
1001         if (ev->response) return sal_find_other(sal,ev->response);
1002         return NULL;
1003 }
1004
1005 static void inc_new_call(Sal *sal, eXosip_event_t *ev){
1006         SalOp *op=sal_op_new(sal);
1007         osip_from_t *from,*to;
1008         osip_call_info_t *call_info;
1009         char *tmp;
1010         sdp_message_t *sdp=eXosip_get_sdp_info(ev->request);
1011
1012         set_network_origin(op,ev->request);
1013         set_remote_ua(op,ev->request);
1014         set_replaces(op,ev->request);
1015
1016         if (sdp){
1017                 op->sdp_offering=FALSE;
1018                 op->base.remote_media=sal_media_description_new();
1019                 sdp_to_media_description(sdp,op->base.remote_media);
1020                 sdp_message_free(sdp);
1021         }else op->sdp_offering=TRUE;
1022
1023         from=osip_message_get_from(ev->request);
1024         to=osip_message_get_to(ev->request);
1025         osip_from_to_str(from,&tmp);
1026         sal_op_set_from(op,tmp);
1027         osip_free(tmp);
1028         osip_from_to_str(to,&tmp);
1029         sal_op_set_to(op,tmp);
1030         osip_free(tmp);
1031
1032         osip_message_get_call_info(ev->request,0,&call_info);
1033         if(call_info)
1034         {
1035                 osip_call_info_to_str(call_info,&tmp);
1036                 if( strstr(tmp,"answer-after=") != NULL)
1037                 {
1038                         op->auto_answer_asked=TRUE;
1039                         ms_message("The caller asked to automatically answer the call(Emergency?)\n");
1040                 }
1041                 osip_free(tmp);
1042         }
1043
1044         op->tid=ev->tid;
1045         op->cid=ev->cid;
1046         op->did=ev->did;
1047
1048         sal_add_call(op->base.root,op);
1049         sal->callbacks.call_received(op);
1050 }
1051
1052 static void handle_reinvite(Sal *sal,  eXosip_event_t *ev){
1053         SalOp *op=find_op(sal,ev);
1054         sdp_message_t *sdp;
1055
1056         if (op==NULL) {
1057                 ms_warning("Reinvite for non-existing operation !");
1058                 return;
1059         }
1060         op->reinvite=TRUE;
1061         op->tid=ev->tid;
1062         sdp=eXosip_get_sdp_info(ev->request);
1063         if (op->base.remote_media){
1064                 sal_media_description_unref(op->base.remote_media);
1065                 op->base.remote_media=NULL;
1066         }
1067         if (op->result){
1068                 sal_media_description_unref(op->result);
1069                 op->result=NULL;
1070         }
1071         if (sdp){
1072                 op->sdp_offering=FALSE;
1073                 op->base.remote_media=sal_media_description_new();
1074                 sdp_to_media_description(sdp,op->base.remote_media);
1075                 sdp_message_free(sdp);
1076
1077         }else {
1078                 op->sdp_offering=TRUE;
1079         }
1080         sal->callbacks.call_updating(op);
1081 }
1082
1083 static void handle_ack(Sal *sal,  eXosip_event_t *ev){
1084         SalOp *op=find_op(sal,ev);
1085         sdp_message_t *sdp;
1086
1087         if (op==NULL) {
1088                 ms_warning("ack for non-existing call !");
1089                 return;
1090         }
1091         if (op->terminated) {
1092                 ms_warning("ack for terminated call, ignoring");
1093                 return;
1094         }
1095
1096         if (op->sdp_offering){
1097                 sdp=eXosip_get_sdp_info(ev->ack);
1098                 if (sdp){
1099                         if (op->base.remote_media)
1100                                 sal_media_description_unref(op->base.remote_media);
1101                         op->base.remote_media=sal_media_description_new();
1102                         sdp_to_media_description(sdp,op->base.remote_media);
1103                         sdp_process(op);
1104                         sdp_message_free(sdp);
1105                 }
1106         }
1107         if (op->reinvite){
1108                 op->reinvite=FALSE;
1109         }
1110         sal->callbacks.call_ack(op);
1111 }
1112
1113 static void update_contact_from_response(SalOp *op, osip_message_t *response){
1114         const char *received;
1115         int rport;
1116         SalTransport transport;
1117         if (extract_received_rport(response,&received,&rport,&transport)==0){
1118                 const char *contact=sal_op_get_contact(op);
1119                 if (!contact){
1120                         /*no contact given yet, use from instead*/
1121                         contact=sal_op_get_from(op);
1122                 }
1123                 if (contact){
1124                         SalAddress *addr=sal_address_new(contact);
1125                         char *tmp;
1126                         sal_address_set_domain(addr,received);
1127                         sal_address_set_port_int(addr,rport);
1128                         if (transport!=SalTransportUDP)
1129                                 sal_address_set_transport(addr,transport);
1130                         tmp=sal_address_as_string(addr);
1131                         ms_message("Contact address updated to %s",tmp);
1132                         sal_op_set_contact(op,tmp);
1133                         sal_address_destroy(addr);
1134                         ms_free(tmp);
1135                 }
1136         }
1137 }
1138
1139 static int call_proceeding(Sal *sal, eXosip_event_t *ev){
1140         SalOp *op=find_op(sal,ev);
1141
1142         if (op==NULL || op->terminated==TRUE) {
1143                 ms_warning("This call has been canceled.");
1144                 eXosip_lock();
1145                 eXosip_call_terminate(ev->cid,ev->did);
1146                 eXosip_unlock();
1147                 return -1;
1148         }
1149         if (ev->did>0)
1150                 op->did=ev->did;
1151         op->tid=ev->tid;
1152
1153         /* update contact if received and rport are set by the server
1154          note: will only be used by remote for next INVITE, if any...*/
1155         update_contact_from_response(op,ev->response);
1156         return 0;
1157 }
1158
1159 static void call_ringing(Sal *sal, eXosip_event_t *ev){
1160         sdp_message_t *sdp;
1161         SalOp *op=find_op(sal,ev);
1162         if (call_proceeding(sal, ev)==-1) return;
1163
1164         set_remote_ua(op,ev->response);
1165         sdp=eXosip_get_sdp_info(ev->response);
1166         if (sdp){
1167                 op->base.remote_media=sal_media_description_new();
1168                 sdp_to_media_description(sdp,op->base.remote_media);
1169                 sdp_message_free(sdp);
1170                 if (op->base.local_media) sdp_process(op);
1171         }
1172         sal->callbacks.call_ringing(op);
1173 }
1174
1175 static void call_accepted(Sal *sal, eXosip_event_t *ev){
1176         sdp_message_t *sdp;
1177         osip_message_t *msg=NULL;
1178         SalOp *op=find_op(sal,ev);
1179         const char *contact;
1180
1181         if (op==NULL || op->terminated==TRUE) {
1182                 ms_warning("This call has been already terminated.");
1183                 eXosip_lock();
1184                 eXosip_call_terminate(ev->cid,ev->did);
1185                 eXosip_unlock();
1186                 return ;
1187         }
1188
1189         op->did=ev->did;
1190         set_remote_ua(op,ev->response);
1191
1192         sdp=eXosip_get_sdp_info(ev->response);
1193         if (sdp){
1194                 op->base.remote_media=sal_media_description_new();
1195                 sdp_to_media_description(sdp,op->base.remote_media);
1196                 sdp_message_free(sdp);
1197                 if (op->base.local_media) sdp_process(op);
1198         }
1199         eXosip_call_build_ack(ev->did,&msg);
1200         if (msg==NULL) {
1201                 ms_warning("This call has been already terminated.");
1202                 eXosip_lock();
1203                 eXosip_call_terminate(ev->cid,ev->did);
1204                 eXosip_unlock();
1205                 return ;
1206         }
1207         contact=sal_op_get_contact(op);
1208         if (contact) {
1209                 _osip_list_set_empty(&msg->contacts,(void (*)(void*))osip_contact_free);
1210                 osip_message_set_contact(msg,contact);
1211         }
1212         if (op->sdp_answer){
1213                 set_sdp(msg,op->sdp_answer);
1214                 sdp_message_free(op->sdp_answer);
1215                 op->sdp_answer=NULL;
1216         }
1217         eXosip_call_send_ack(ev->did,msg);
1218         sal->callbacks.call_accepted(op);
1219 }
1220
1221 static void call_terminated(Sal *sal, eXosip_event_t *ev){
1222         char *from=NULL;
1223         SalOp *op=find_op(sal,ev);
1224         if (op==NULL){
1225                 ms_warning("Call terminated for already closed call ?");
1226                 return;
1227         }
1228         if (ev->request){
1229                 osip_from_to_str(ev->request->from,&from);
1230         }
1231         sal->callbacks.call_terminated(op,from!=NULL ? from : sal_op_get_from(op));
1232         if (from) osip_free(from);
1233         op->terminated=TRUE;
1234 }
1235
1236 static void call_released(Sal *sal, eXosip_event_t *ev){
1237         SalOp *op=find_op(sal,ev);
1238         if (op==NULL){
1239                 ms_warning("No op associated to this call_released()");
1240                 return;
1241         }
1242         if (!op->terminated){
1243                 /* no response received so far */
1244                 call_failure(sal,ev);
1245         }
1246         sal->callbacks.call_released(op);
1247 }
1248
1249 static int get_auth_data_from_response(osip_message_t *resp, const char **realm, const char **username){
1250         const char *prx_realm=NULL,*www_realm=NULL;
1251         osip_proxy_authenticate_t *prx_auth;
1252         osip_www_authenticate_t *www_auth;
1253
1254         *username=osip_uri_get_username(resp->from->url);
1255         prx_auth=(osip_proxy_authenticate_t*)osip_list_get(&resp->proxy_authenticates,0);
1256         www_auth=(osip_proxy_authenticate_t*)osip_list_get(&resp->www_authenticates,0);
1257         if (prx_auth!=NULL)
1258                 prx_realm=osip_proxy_authenticate_get_realm(prx_auth);
1259         if (www_auth!=NULL)
1260                 www_realm=osip_www_authenticate_get_realm(www_auth);
1261
1262         if (prx_realm){
1263                 *realm=prx_realm;
1264         }else if (www_realm){
1265                 *realm=www_realm;
1266         }else{
1267                 return -1;
1268         }
1269         return 0;
1270 }
1271
1272 static int get_auth_data_from_request(osip_message_t *msg, const char **realm, const char **username){
1273         osip_authorization_t *auth=NULL;
1274         osip_proxy_authorization_t *prx_auth=NULL;
1275
1276         *username=osip_uri_get_username(msg->from->url);
1277         osip_message_get_authorization(msg, 0, &auth);
1278         if (auth){
1279                 *realm=osip_authorization_get_realm(auth);
1280                 return 0;
1281         }
1282         osip_message_get_proxy_authorization(msg,0,&prx_auth);
1283         if (prx_auth){
1284                 *realm=osip_proxy_authorization_get_realm(prx_auth);
1285                 return 0;
1286         }
1287         return -1;
1288 }
1289
1290 static int get_auth_data(eXosip_event_t *ev, const char **realm, const char **username){
1291         if (ev->response && get_auth_data_from_response(ev->response,realm,username)==0) return 0;
1292         if (ev->request && get_auth_data_from_request(ev->request,realm,username)==0) return 0;
1293         return -1;
1294 }
1295
1296 int sal_op_get_auth_requested(SalOp *op, const char **realm, const char **username){
1297         if (op->pending_auth){
1298                 return get_auth_data(op->pending_auth,realm,username);
1299         }
1300         return -1;
1301 }
1302
1303 static bool_t process_authentication(Sal *sal, eXosip_event_t *ev){
1304         SalOp *op;
1305         const char *username,*realm;
1306         op=find_op(sal,ev);
1307         if (op==NULL){
1308                 ms_warning("No operation associated with this authentication !");
1309                 return TRUE;
1310         }
1311         if (get_auth_data(ev,&realm,&username)==0){
1312                 if (op->pending_auth!=NULL){
1313                         eXosip_event_free(op->pending_auth);
1314                         op->pending_auth=ev;
1315                 }else{
1316                         op->pending_auth=ev;
1317                         sal_add_pending_auth(sal,op);
1318                 }
1319
1320                 sal->callbacks.auth_requested(op,realm,username);
1321                 return FALSE;
1322         }
1323         return TRUE;
1324 }
1325
1326 static void authentication_ok(Sal *sal, eXosip_event_t *ev){
1327         SalOp *op;
1328         const char *username,*realm;
1329         op=find_op(sal,ev);
1330         if (op==NULL){
1331                 ms_warning("No operation associated with this authentication_ok!");
1332                 return ;
1333         }
1334         if (op->pending_auth){
1335                 eXosip_event_free(op->pending_auth);
1336                 sal_remove_pending_auth(sal,op);
1337                 op->pending_auth=NULL;
1338         }
1339         if (get_auth_data(ev,&realm,&username)==0){
1340                 sal->callbacks.auth_success(op,realm,username);
1341         }
1342 }
1343
1344 static bool_t call_failure(Sal *sal, eXosip_event_t *ev){
1345         SalOp *op;
1346         int code=0;
1347         char* computedReason=NULL;
1348         const char *reason=NULL;
1349         SalError error=SalErrorUnknown;
1350         SalReason sr=SalReasonUnknown;
1351
1352
1353         op=(SalOp*)find_op(sal,ev);
1354
1355         if (op==NULL) {
1356                 ms_warning("Call failure reported for a closed call, ignored.");
1357                 return TRUE;
1358         }
1359
1360         if (ev->response){
1361                 code=osip_message_get_status_code(ev->response);
1362                 reason=osip_message_get_reason_phrase(ev->response);
1363                 osip_header_t *h=NULL;
1364                 if (!osip_message_header_get_byname(    ev->response
1365                                                                                         ,"Reason"
1366                                                                                         ,0
1367                                                                                         ,&h)) {
1368                         computedReason = ms_strdup_printf("%s %s",reason,osip_header_get_value(h));
1369                         reason = computedReason;
1370
1371                 }
1372         }
1373         switch(code)
1374         {
1375                 case 401:
1376                 case 407:
1377                         return process_authentication(sal,ev);
1378                         break;
1379                 case 400:
1380                         error=SalErrorUnknown;
1381                 break;
1382                 case 404:
1383                         error=SalErrorFailure;
1384                         sr=SalReasonNotFound;
1385                 break;
1386                 case 415:
1387                         error=SalErrorFailure;
1388                         sr=SalReasonMedia;
1389                 break;
1390                 case 422:
1391                         eXosip_default_action(ev);
1392                         return TRUE;
1393                 break;
1394                 case 480:
1395                         error=SalErrorFailure;
1396                         sr=SalReasonTemporarilyUnavailable;
1397                 case 486:
1398                         error=SalErrorFailure;
1399                         sr=SalReasonBusy;
1400                 break;
1401                 case 487:
1402                 break;
1403                 case 600:
1404                         error=SalErrorFailure;
1405                         sr=SalReasonDoNotDisturb;
1406                 break;
1407                 case 603:
1408                         error=SalErrorFailure;
1409                         sr=SalReasonDeclined;
1410                 break;
1411                 default:
1412                         if (code>0){
1413                                 error=SalErrorFailure;
1414                                 sr=SalReasonUnknown;
1415                         }else error=SalErrorNoResponse;
1416         }
1417         op->terminated=TRUE;
1418         sal->callbacks.call_failure(op,error,sr,reason,code);
1419         if (computedReason != NULL){
1420                 ms_free(computedReason);
1421         }
1422         return TRUE;
1423 }
1424
1425 /* Request remote side to send us VFU */
1426 void sal_call_send_vfu_request(SalOp *h){
1427         osip_message_t *msg=NULL;
1428         char info_body[] =
1429                         "<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
1430                          "<media_control>"
1431                          "  <vc_primitive>"
1432                          "    <to_encoder>"
1433                          "      <picture_fast_update></picture_fast_update>"
1434                          "    </to_encoder>"
1435                          "  </vc_primitive>"
1436                          "</media_control>";
1437
1438         char clen[10];
1439
1440         eXosip_lock();
1441         eXosip_call_build_info(h->did,&msg);
1442         if (msg){
1443                 osip_message_set_body(msg,info_body,strlen(info_body));
1444                 osip_message_set_content_type(msg,"application/media_control+xml");
1445                 snprintf(clen,sizeof(clen),"%lu",(unsigned long)strlen(info_body));
1446                 osip_message_set_content_length(msg,clen);
1447                 eXosip_call_send_request(h->did,msg);
1448                 ms_message("Sending VFU request !");
1449         }
1450         eXosip_unlock();
1451 }
1452
1453 static void process_media_control_xml(Sal *sal, eXosip_event_t *ev){
1454         SalOp *op=find_op(sal,ev);
1455         osip_body_t *body=NULL;
1456
1457         if (op==NULL){
1458                 ms_warning("media control xml received without operation context!");
1459                 return ;
1460         }
1461
1462         osip_message_get_body(ev->request,0,&body);
1463         if (body && body->body!=NULL &&
1464                 strstr(body->body,"picture_fast_update")){
1465                 osip_message_t *ans=NULL;
1466                 ms_message("Receiving VFU request !");
1467                 if (sal->callbacks.vfu_request){
1468                         sal->callbacks.vfu_request(op);
1469                         eXosip_call_build_answer(ev->tid,200,&ans);
1470                         if (ans)
1471                                 eXosip_call_send_answer(ev->tid,200,ans);
1472                         return;
1473                 }
1474         }
1475         /*in all other cases we must say it is not implemented.*/
1476         {
1477                 osip_message_t *ans=NULL;
1478                 eXosip_lock();
1479                 eXosip_call_build_answer(ev->tid,501,&ans);
1480                 if (ans)
1481                         eXosip_call_send_answer(ev->tid,501,ans);
1482                 eXosip_unlock();
1483         }
1484 }
1485
1486 static void process_dtmf_relay(Sal *sal, eXosip_event_t *ev){
1487         SalOp *op=find_op(sal,ev);
1488         osip_body_t *body=NULL;
1489
1490         if (op==NULL){
1491                 ms_warning("media dtmf relay received without operation context!");
1492                 return ;
1493         }
1494
1495         osip_message_get_body(ev->request,0,&body);
1496         if (body && body->body!=NULL){
1497                 osip_message_t *ans=NULL;
1498                 const char *name=strstr(body->body,"Signal");
1499                 if (name==NULL) name=strstr(body->body,"signal");
1500                 if (name==NULL) {
1501                         ms_warning("Could not extract the dtmf name from the SIP INFO.");
1502                 }else{
1503                         char tmp[2];
1504                         name+=strlen("signal");
1505                         if (sscanf(name," = %1s",tmp)==1){
1506                                 ms_message("Receiving dtmf %s via SIP INFO.",tmp);
1507                                 if (sal->callbacks.dtmf_received != NULL)
1508                                         sal->callbacks.dtmf_received(op, tmp[0]);
1509                         }
1510                 }
1511                 eXosip_lock();
1512                 eXosip_call_build_answer(ev->tid,200,&ans);
1513                 if (ans)
1514                         eXosip_call_send_answer(ev->tid,200,ans);
1515                 eXosip_unlock();
1516         }
1517 }
1518
1519 static void fill_options_answer(osip_message_t *options){
1520         osip_message_set_allow(options,"INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, SUBSCRIBE, NOTIFY, INFO");
1521         osip_message_set_accept(options,"application/sdp");
1522 }
1523
1524 static void process_refer(Sal *sal, SalOp *op, eXosip_event_t *ev){
1525         osip_header_t *h=NULL;
1526         osip_message_t *ans=NULL;
1527         ms_message("Receiving REFER request !");
1528         osip_message_header_get_byname(ev->request,"Refer-To",0,&h);
1529
1530         if (h){
1531                 osip_from_t *from=NULL;
1532                 char *tmp;
1533                 osip_from_init(&from);
1534
1535                 if (osip_from_parse(from,h->hvalue)==0){
1536                         if (op ){
1537                                 osip_uri_header_t *uh=NULL;
1538                                 osip_header_t *referred_by=NULL;
1539                                 osip_uri_header_get_byname(&from->url->url_headers,(char*)"Replaces",&uh);
1540                                 if (uh!=NULL && uh->gvalue && uh->gvalue[0]!='\0'){
1541                                         ms_message("Found replaces in Refer-To");
1542                                         if (op->replaces){
1543                                                 ms_free(op->replaces);
1544                                         }
1545                                         op->replaces=ms_strdup(uh->gvalue);
1546                                 }
1547                                 osip_message_header_get_byname(ev->request,"Referred-By",0,&referred_by);
1548                                 if (referred_by && referred_by->hvalue && referred_by->hvalue[0]!='\0'){
1549                                         if (op->referred_by)
1550                                                 ms_free(op->referred_by);
1551                                         op->referred_by=ms_strdup(referred_by->hvalue);
1552                                 }
1553                         }
1554                         osip_uri_header_freelist(&from->url->url_headers);
1555                         osip_from_to_str(from,&tmp);
1556                         sal->callbacks.refer_received(sal,op,tmp);
1557                         osip_free(tmp);
1558                         osip_from_free(from);
1559                 }
1560                 eXosip_lock();
1561                 eXosip_call_build_answer(ev->tid,202,&ans);
1562                 if (ans)
1563                         eXosip_call_send_answer(ev->tid,202,ans);
1564                 eXosip_unlock();
1565         }
1566         else
1567         {
1568                 ms_warning("cannot do anything with the refer without destination\n");
1569         }
1570 }
1571
1572 static void process_notify(Sal *sal, eXosip_event_t *ev){
1573         osip_header_t *h=NULL;
1574         char *from=NULL;
1575         SalOp *op=find_op(sal,ev);
1576         osip_message_t *ans=NULL;
1577
1578         ms_message("Receiving NOTIFY request !");
1579         osip_from_to_str(ev->request->from,&from);
1580         osip_message_header_get_byname(ev->request,"Event",0,&h);
1581         if(h){
1582                 osip_body_t *body=NULL;
1583                 //osip_content_type_t *ct=NULL;
1584                 osip_message_get_body(ev->request,0,&body);
1585                 //ct=osip_message_get_content_type(ev->request);
1586                 if (h->hvalue && strcasecmp(h->hvalue,"refer")==0){
1587                         /*special handling of refer events*/
1588                         if (body && body->body){
1589                                 osip_message_t *msg;
1590                                 osip_message_init(&msg);
1591                                 if (osip_message_parse_sipfrag(msg,body->body,strlen(body->body))==0){
1592                                         int code=osip_message_get_status_code(msg);
1593                                         if (code==100){
1594                                                 sal->callbacks.notify_refer(op,SalReferTrying);
1595                                         }else if (code==200){
1596                                                 sal->callbacks.notify_refer(op,SalReferSuccess);
1597                                         }else if (code>=400){
1598                                                 sal->callbacks.notify_refer(op,SalReferFailed);
1599                                         }
1600                                 }
1601                                 osip_message_free(msg);
1602                         }
1603                 }else{
1604                         /*generic handling*/
1605                         sal->callbacks.notify(op,from,h->hvalue);
1606                 }
1607         }
1608         /*answer that we received the notify*/
1609         eXosip_lock();
1610         eXosip_call_build_answer(ev->tid,200,&ans);
1611         if (ans)
1612                 eXosip_call_send_answer(ev->tid,200,ans);
1613         eXosip_unlock();
1614         osip_free(from);
1615 }
1616
1617 static void call_message_new(Sal *sal, eXosip_event_t *ev){
1618         osip_message_t *ans=NULL;
1619         if (ev->request){
1620                 if (MSG_IS_INFO(ev->request)){
1621                         osip_content_type_t *ct;
1622                         ct=osip_message_get_content_type(ev->request);
1623                         if (ct && ct->subtype){
1624                                 if (strcmp(ct->subtype,"media_control+xml")==0)
1625                                         process_media_control_xml(sal,ev);
1626                                 else if (strcmp(ct->subtype,"dtmf-relay")==0)
1627                                         process_dtmf_relay(sal,ev);
1628                                 else {
1629                                         ms_message("Unhandled SIP INFO.");
1630                                         /*send an "Not implemented" answer*/
1631                                         eXosip_lock();
1632                                         eXosip_call_build_answer(ev->tid,501,&ans);
1633                                         if (ans)
1634                                                 eXosip_call_send_answer(ev->tid,501,ans);
1635                                         eXosip_unlock();
1636                                 }
1637                         }else{
1638                                 /*empty SIP INFO, probably to test we are alive. Send an empty answer*/
1639                                 eXosip_lock();
1640                                 eXosip_call_build_answer(ev->tid,200,&ans);
1641                                 if (ans)
1642                                         eXosip_call_send_answer(ev->tid,200,ans);
1643                                 eXosip_unlock();
1644                         }
1645                 }else if(MSG_IS_MESSAGE(ev->request)){
1646                         /* SIP messages could be received into call */
1647                         text_received(sal, ev);
1648                         eXosip_lock();
1649                         eXosip_call_build_answer(ev->tid,200,&ans);
1650                         if (ans)
1651                                 eXosip_call_send_answer(ev->tid,200,ans);
1652                         eXosip_unlock();
1653                 }else if(MSG_IS_REFER(ev->request)){
1654                         SalOp *op=find_op(sal,ev);
1655
1656                         ms_message("Receiving REFER request !");
1657                         process_refer(sal,op,ev);
1658                 }else if(MSG_IS_NOTIFY(ev->request)){
1659                         process_notify(sal,ev);
1660                 }else if (MSG_IS_OPTIONS(ev->request)){
1661                         eXosip_lock();
1662                         eXosip_call_build_answer(ev->tid,200,&ans);
1663                         if (ans){
1664                                 fill_options_answer(ans);
1665                                 eXosip_call_send_answer(ev->tid,200,ans);
1666                         }
1667                         eXosip_unlock();
1668                 }
1669         }else ms_warning("call_message_new: No request ?");
1670 }
1671
1672 static void inc_update(Sal *sal, eXosip_event_t *ev){
1673         osip_message_t *msg=NULL;
1674         ms_message("Processing incoming UPDATE");
1675         eXosip_lock();
1676         eXosip_message_build_answer(ev->tid,200,&msg);
1677         if (msg!=NULL)
1678                 eXosip_message_send_answer(ev->tid,200,msg);
1679         eXosip_unlock();
1680 }
1681
1682 static bool_t comes_from_local_if(osip_message_t *msg){
1683         osip_via_t *via=NULL;
1684         osip_message_get_via(msg,0,&via);
1685         if (via){
1686                 const char *host;
1687                 host=osip_via_get_host(via);
1688                 if (strcmp(host,"127.0.0.1")==0 || strcmp(host,"::1")==0){
1689                         osip_generic_param_t *param=NULL;
1690                         osip_via_param_get_byname(via,"received",&param);
1691                         if (param==NULL) return TRUE;
1692                         if (param->gvalue &&
1693                                 (strcmp(param->gvalue,"127.0.0.1")==0 || strcmp(param->gvalue,"::1")==0)){
1694                                 return TRUE;
1695                         }
1696                 }
1697         }
1698         return FALSE;
1699 }
1700
1701 static void text_received(Sal *sal, eXosip_event_t *ev){
1702         osip_body_t *body=NULL;
1703         char *from=NULL,*msg;
1704
1705         osip_message_get_body(ev->request,0,&body);
1706         if (body==NULL){
1707                 ms_error("Could not get text message from SIP body");
1708                 return;
1709         }
1710         msg=body->body;
1711         osip_from_to_str(ev->request->from,&from);
1712         sal->callbacks.text_received(sal,from,msg);
1713         osip_free(from);
1714 }
1715
1716
1717
1718 static void other_request(Sal *sal, eXosip_event_t *ev){
1719         ms_message("in other_request");
1720         if (ev->request==NULL) return;
1721         if (strcmp(ev->request->sip_method,"MESSAGE")==0){
1722                 text_received(sal,ev);
1723                 eXosip_message_send_answer(ev->tid,200,NULL);
1724         }else if (strcmp(ev->request->sip_method,"OPTIONS")==0){
1725                 osip_message_t *options=NULL;
1726                 eXosip_options_build_answer(ev->tid,200,&options);
1727                 fill_options_answer(options);
1728                 eXosip_options_send_answer(ev->tid,200,options);
1729         }else if (strncmp(ev->request->sip_method, "REFER", 5) == 0){
1730                 ms_message("Receiving REFER request !");
1731                 if (comes_from_local_if(ev->request)) {
1732                         process_refer(sal,NULL,ev);
1733                 }else ms_warning("Ignored REFER not coming from this local loopback interface.");
1734         }else if (strncmp(ev->request->sip_method, "UPDATE", 6) == 0){
1735                 inc_update(sal,ev);
1736     }else {
1737                 char *tmp=NULL;
1738                 size_t msglen=0;
1739                 osip_message_to_str(ev->request,&tmp,&msglen);
1740                 if (tmp){
1741                         ms_message("Unsupported request received:\n%s",tmp);
1742                         osip_free(tmp);
1743                 }
1744                 /*answer with a 501 Not implemented*/
1745                 eXosip_message_send_answer(ev->tid,501,NULL);
1746         }
1747 }
1748
1749 static void masquerade_via(osip_message_t *msg, const char *ip, const char *port){
1750         osip_via_t *via=NULL;
1751         osip_message_get_via(msg,0,&via);
1752         if (via){
1753                 osip_free(via->port);
1754                 via->port=osip_strdup(port);
1755                 osip_free(via->host);
1756                 via->host=osip_strdup(ip);
1757         }
1758 }
1759
1760
1761 static bool_t fix_message_contact(SalOp *op, osip_message_t *request,osip_message_t *last_answer, bool_t expire_last_contact) {
1762         osip_contact_t *ctt=NULL;
1763         const char *received;
1764         int rport;
1765         SalTransport transport;
1766         char port[20];
1767
1768         if (extract_received_rport(last_answer,&received,&rport,&transport)==-1) return FALSE;
1769         osip_message_get_contact(request,0,&ctt);
1770         if (ctt == NULL) {
1771                 ms_warning("fix_message_contact(): no contact to update");
1772                 return FALSE;
1773         }
1774         if (expire_last_contact){
1775                 osip_contact_t *oldct=NULL,*prevct;
1776                 osip_generic_param_t *param=NULL;
1777                 osip_contact_clone(ctt,&oldct);
1778                 while ((prevct=(osip_contact_t*)osip_list_get(&request->contacts,1))!=NULL){
1779                         osip_contact_free(prevct);
1780                         osip_list_remove(&request->contacts,1);
1781                 }
1782                 osip_list_add(&request->contacts,oldct,1);
1783                 osip_contact_param_get_byname(oldct,"expires",&param);
1784                 if (param){
1785                         if (param->gvalue) osip_free(param->gvalue);
1786                         param->gvalue=osip_strdup("0");
1787                 }else{
1788                         osip_contact_param_add(oldct,osip_strdup("expires"),osip_strdup("0"));
1789                 }
1790         }
1791         if (ctt->url->host!=NULL){
1792                 osip_free(ctt->url->host);
1793         }
1794         ctt->url->host=osip_strdup(received);
1795         if (ctt->url->port!=NULL){
1796                 osip_free(ctt->url->port);
1797         }
1798         snprintf(port,sizeof(port),"%i",rport);
1799         ctt->url->port=osip_strdup(port);
1800         if (op->masquerade_via) masquerade_via(request,received,port);
1801
1802         if (transport != SalTransportUDP) {
1803                 sal_address_set_param((SalAddress *)ctt, "transport", sal_transport_to_string(transport));
1804         }
1805         return TRUE;
1806 }
1807
1808 static bool_t register_again_with_updated_contact(SalOp *op, osip_message_t *orig_request, osip_message_t *last_answer){
1809         osip_contact_t *ctt=NULL;
1810         SalAddress* ori_contact_address=NULL;
1811         const char *received;
1812         int rport;
1813         SalTransport transport;
1814         char* tmp;
1815         osip_message_t *msg=NULL;
1816         Sal* sal=op->base.root;
1817         int i=0;
1818         bool_t found_valid_contact=FALSE;
1819         bool_t from_request=FALSE;
1820
1821         if (sal->double_reg==FALSE ) return FALSE;
1822
1823         if (extract_received_rport(last_answer,&received,&rport,&transport)==-1) return FALSE;
1824         do{
1825                 ctt=NULL;
1826                 osip_message_get_contact(last_answer,i,&ctt);
1827                 if (!from_request && ctt==NULL) {
1828                         osip_message_get_contact(orig_request,0,&ctt);
1829                         from_request=TRUE;
1830                 }
1831                 if (ctt){
1832                         osip_contact_to_str(ctt,&tmp);
1833                         ori_contact_address = sal_address_new(tmp);
1834
1835                         /*check if contact is up to date*/
1836                         if (strcmp(sal_address_get_domain(ori_contact_address),received) ==0
1837                                 && sal_address_get_port_int(ori_contact_address) == rport
1838                         && sal_address_get_transport(ori_contact_address) == transport) {
1839                                 if (!from_request){
1840                                         ms_message("Register response has up to date contact, doing nothing.");
1841                                 }else {
1842                                         ms_warning("Register response does not have up to date contact, but last request had."
1843                                                 "Stupid registrar detected, giving up.");
1844                                 }
1845                                 found_valid_contact=TRUE;
1846                         }
1847                         osip_free(tmp);
1848                         sal_address_destroy(ori_contact_address);
1849                 }else break;
1850                 i++;
1851         }while(!found_valid_contact);
1852         if (!found_valid_contact)
1853                 ms_message("Contact do not match, resending register.");
1854         else return FALSE;
1855
1856         eXosip_lock();
1857         eXosip_register_build_register(op->rid,op->expires,&msg);
1858         if (msg==NULL){
1859             eXosip_unlock();
1860             ms_warning("Fail to create a contact updated register.");
1861             return FALSE;
1862         }
1863         if (fix_message_contact(op,msg,last_answer,op->base.root->expire_old_contact)) {
1864                 eXosip_register_send_register(op->rid,msg);
1865                 eXosip_unlock();
1866                 ms_message("Resending new register with updated contact");
1867                 update_contact_from_response(op,last_answer);
1868                 return TRUE;
1869         } else {
1870             ms_warning("Fail to send updated register.");
1871             eXosip_unlock();
1872             return FALSE;
1873         }
1874         eXosip_unlock();
1875         return FALSE;
1876 }
1877
1878 static void registration_success(Sal *sal, eXosip_event_t *ev){
1879         SalOp *op=sal_find_register(sal,ev->rid);
1880         osip_header_t *h=NULL;
1881         bool_t registered;
1882         if (op==NULL){
1883                 ms_error("Receiving register response for unknown operation");
1884                 return;
1885         }
1886         osip_message_get_expires(ev->request,0,&h);
1887         if (h!=NULL && atoi(h->hvalue)!=0){
1888                 registered=TRUE;
1889                 if (!register_again_with_updated_contact(op,ev->request,ev->response)){
1890                         sal->callbacks.register_success(op,registered);
1891                 }
1892         }else {
1893                 sal->callbacks.register_success(op,FALSE);
1894         }
1895 }
1896
1897 static bool_t registration_failure(Sal *sal, eXosip_event_t *ev){
1898         int status_code=0;
1899         const char *reason=NULL;
1900         SalOp *op=sal_find_register(sal,ev->rid);
1901         SalReason sr=SalReasonUnknown;
1902         SalError se=SalErrorUnknown;
1903
1904         if (op==NULL){
1905                 ms_error("Receiving register failure for unknown operation");
1906                 return TRUE;
1907         }
1908         if (ev->response){
1909                 status_code=osip_message_get_status_code(ev->response);
1910                 reason=osip_message_get_reason_phrase(ev->response);
1911         }
1912         switch(status_code){
1913                 case 401:
1914                 case 407:
1915                         return process_authentication(sal,ev);
1916                         break;
1917                 case 423: /*interval too brief*/
1918                         {/*retry with greater interval */
1919                                 osip_header_t *h=NULL;
1920                                 osip_message_t *msg=NULL;
1921                                 osip_message_header_get_byname(ev->response,"min-expires",0,&h);
1922                                 if (h && h->hvalue && h->hvalue[0]!='\0'){
1923                                         int val=atoi(h->hvalue);
1924                                         if (val>op->expires)
1925                                                 op->expires=val;
1926                                 }else op->expires*=2;
1927                                 eXosip_lock();
1928                                 eXosip_register_build_register(op->rid,op->expires,&msg);
1929                                 eXosip_register_send_register(op->rid,msg);
1930                                 eXosip_unlock();
1931                         }
1932                 break;
1933                 case 606: /*Not acceptable, workaround for proxies that don't like private addresses
1934                                  in vias, such as ekiga.net
1935                                  On the opposite, freephonie.net bugs when via are masqueraded.
1936                                  */
1937                         op->masquerade_via=TRUE;
1938                 default:
1939                         /* if contact is up to date, process the failure, otherwise resend a new register with
1940                                 updated contact first, just in case the faillure is due to incorrect contact */
1941                         if (ev->response && register_again_with_updated_contact(op,ev->request,ev->response))
1942                                 return TRUE; /*we are retrying with an updated contact*/
1943                         if (status_code==403){
1944                                 se=SalErrorFailure;
1945                                 sr=SalReasonForbidden;
1946                         }else if (status_code==0){
1947                                 se=SalErrorNoResponse;
1948                         }
1949                         sal->callbacks.register_failure(op,se,sr,reason);
1950         }
1951         return TRUE;
1952 }
1953
1954 static void other_request_reply(Sal *sal,eXosip_event_t *ev){
1955         SalOp *op=find_op(sal,ev);
1956         LinphoneChatMessage* chat_msg;
1957         if (op==NULL){
1958                 ms_warning("other_request_reply(): Receiving response to unknown request.");
1959                 return;
1960         }
1961         if (ev->response){
1962                 ms_message("Processing reponse status [%i] for method [%s]",ev->response->status_code,osip_message_get_method(ev->request));
1963                 update_contact_from_response(op,ev->response);
1964                 if (ev->request && strcmp(osip_message_get_method(ev->request),"OPTIONS")==0)
1965                         sal->callbacks.ping_reply(op);
1966                 else if (ev->request && strcmp(osip_message_get_method(ev->request),"MESSAGE")==0) {
1967                         /*out of call message acknolegment*/
1968                         chat_msg=(LinphoneChatMessage* )op->base.user_pointer;
1969                         if (chat_msg->cb) {
1970                                 chat_msg->cb(chat_msg
1971                                                          ,(ev->response->status_code==200?LinphoneChatMessageStateDelivered:LinphoneChatMessageStateNotDelivered)
1972                                                          ,chat_msg->cb_ud);
1973                         }
1974                         linphone_chat_message_destroy(chat_msg);
1975                 }
1976         }
1977 }
1978
1979 static void process_in_call_reply(Sal *sal, eXosip_event_t *ev){
1980         SalOp *op=find_op(sal,ev);
1981         if (ev->response){
1982                 if (ev->request && strcmp(osip_message_get_method(ev->request),"NOTIFY")==0){
1983                         if (op->sipfrag_pending){
1984                                 send_notify_for_refer(op->did,op->sipfrag_pending);
1985                                 op->sipfrag_pending=NULL;
1986                         }
1987                 }
1988         }
1989 }
1990
1991 static bool_t process_event(Sal *sal, eXosip_event_t *ev){
1992         ms_message("linphone process event get a message %d\n",ev->type);
1993         switch(ev->type){
1994                 case EXOSIP_CALL_ANSWERED:
1995                         ms_message("CALL_ANSWERED\n");
1996                         call_accepted(sal,ev);
1997                         authentication_ok(sal,ev);
1998                         break;
1999                 case EXOSIP_CALL_CLOSED:
2000                 case EXOSIP_CALL_CANCELLED:
2001                         ms_message("CALL_CLOSED or CANCELLED\n");
2002                         call_terminated(sal,ev);
2003                         break;
2004                 case EXOSIP_CALL_TIMEOUT:
2005                 case EXOSIP_CALL_NOANSWER:
2006                         ms_message("CALL_TIMEOUT or NOANSWER\n");
2007                         return call_failure(sal,ev);
2008                         break;
2009                 case EXOSIP_CALL_REQUESTFAILURE:
2010                 case EXOSIP_CALL_GLOBALFAILURE:
2011                 case EXOSIP_CALL_SERVERFAILURE:
2012                         ms_message("CALL_REQUESTFAILURE or GLOBALFAILURE or SERVERFAILURE\n");
2013                         return call_failure(sal,ev);
2014                         break;
2015                 case EXOSIP_CALL_RELEASED:
2016                         ms_message("CALL_RELEASED\n");
2017                         call_released(sal, ev);
2018                         break;
2019                 case EXOSIP_CALL_INVITE:
2020                         ms_message("CALL_NEW\n");
2021                         inc_new_call(sal,ev);
2022                         break;
2023                 case EXOSIP_CALL_REINVITE:
2024                         handle_reinvite(sal,ev);
2025                         break;
2026                 case EXOSIP_CALL_ACK:
2027                         ms_message("CALL_ACK");
2028                         handle_ack(sal,ev);
2029                         break;
2030                 case EXOSIP_CALL_REDIRECTED:
2031                         ms_message("CALL_REDIRECTED");
2032                         eXosip_default_action(ev);
2033                         break;
2034                 case EXOSIP_CALL_PROCEEDING:
2035                         ms_message("CALL_PROCEEDING");
2036                         call_proceeding(sal,ev);
2037                         break;
2038                 case EXOSIP_CALL_RINGING:
2039                         ms_message("CALL_RINGING");
2040                         call_ringing(sal,ev);
2041                         authentication_ok(sal,ev);
2042                         break;
2043                 case EXOSIP_CALL_MESSAGE_NEW:
2044                         ms_message("EXOSIP_CALL_MESSAGE_NEW");
2045                         call_message_new(sal,ev);
2046                         break;
2047                 case EXOSIP_CALL_MESSAGE_REQUESTFAILURE:
2048                         if (ev->response &&
2049                                 (ev->response->status_code==407 || ev->response->status_code==401)){
2050                                  return process_authentication(sal,ev);
2051                         }
2052                         break;
2053                 case EXOSIP_CALL_MESSAGE_ANSWERED:
2054                         ms_message("EXOSIP_CALL_MESSAGE_ANSWERED ");
2055                         process_in_call_reply(sal,ev);
2056                 break;
2057                 case EXOSIP_IN_SUBSCRIPTION_NEW:
2058                         ms_message("CALL_IN_SUBSCRIPTION_NEW ");
2059                         sal_exosip_subscription_recv(sal,ev);
2060                         break;
2061                 case EXOSIP_IN_SUBSCRIPTION_RELEASED:
2062                         ms_message("CALL_SUBSCRIPTION_NEW ");
2063                         sal_exosip_in_subscription_closed(sal,ev);
2064                         break;
2065                 case EXOSIP_SUBSCRIPTION_UPDATE:
2066                         ms_message("CALL_SUBSCRIPTION_UPDATE");
2067                         break;
2068                 case EXOSIP_SUBSCRIPTION_NOTIFY:
2069                         ms_message("CALL_SUBSCRIPTION_NOTIFY");
2070                         sal_exosip_notify_recv(sal,ev);
2071                         break;
2072                 case EXOSIP_SUBSCRIPTION_ANSWERED:
2073                         ms_message("EXOSIP_SUBSCRIPTION_ANSWERED, ev->sid=%i, ev->did=%i\n",ev->sid,ev->did);
2074                         sal_exosip_subscription_answered(sal,ev);
2075                         break;
2076                 case EXOSIP_SUBSCRIPTION_CLOSED:
2077                         ms_message("EXOSIP_SUBSCRIPTION_CLOSED\n");
2078                         sal_exosip_subscription_closed(sal,ev);
2079                         break;
2080                 case EXOSIP_SUBSCRIPTION_REQUESTFAILURE:   /**< announce a request failure      */
2081                         if (ev->response && (ev->response->status_code == 407 || ev->response->status_code == 401)){
2082                                 return process_authentication(sal,ev);
2083                         }
2084         case EXOSIP_SUBSCRIPTION_SERVERFAILURE:
2085                 case EXOSIP_SUBSCRIPTION_GLOBALFAILURE:
2086                         sal_exosip_subscription_closed(sal,ev);
2087                         break;
2088                 case EXOSIP_REGISTRATION_FAILURE:
2089                         ms_message("REGISTRATION_FAILURE\n");
2090                         return registration_failure(sal,ev);
2091                         break;
2092                 case EXOSIP_REGISTRATION_SUCCESS:
2093                         authentication_ok(sal,ev);
2094                         registration_success(sal,ev);
2095                         break;
2096                 case EXOSIP_MESSAGE_NEW:
2097                         other_request(sal,ev);
2098                         break;
2099                 case EXOSIP_MESSAGE_PROCEEDING:
2100                 case EXOSIP_MESSAGE_ANSWERED:
2101                 case EXOSIP_MESSAGE_REDIRECTED:
2102                 case EXOSIP_MESSAGE_SERVERFAILURE:
2103                 case EXOSIP_MESSAGE_GLOBALFAILURE:
2104                         other_request_reply(sal,ev);
2105                         break;
2106                 case EXOSIP_MESSAGE_REQUESTFAILURE:
2107                 case EXOSIP_NOTIFICATION_REQUESTFAILURE:
2108                         if (ev->response) {
2109                                 switch (ev->response->status_code) {
2110                                         case 407:
2111                                         case 401:
2112                                                 return process_authentication(sal,ev);
2113                                         case 412: {
2114                                                 eXosip_automatic_action ();
2115                                                 return 1;
2116                                         }
2117                                 }
2118                         }
2119                         other_request_reply(sal,ev);
2120                         break;
2121                 default:
2122                         ms_message("Unhandled exosip event ! %i",ev->type);
2123                         break;
2124         }
2125         return TRUE;
2126 }
2127
2128 int sal_iterate(Sal *sal){
2129         eXosip_event_t *ev;
2130         while((ev=eXosip_event_wait(0,0))!=NULL){
2131                 if (process_event(sal,ev))
2132                         eXosip_event_free(ev);
2133         }
2134 #ifdef HAVE_EXOSIP_TRYLOCK
2135         if (eXosip_trylock()==0){
2136                 eXosip_automatic_refresh();
2137                 eXosip_unlock();
2138         }else{
2139                 ms_warning("eXosip_trylock busy.");
2140         }
2141 #else
2142         eXosip_lock();
2143         eXosip_automatic_refresh();
2144         eXosip_unlock();
2145 #endif
2146         return 0;
2147 }
2148
2149 static void register_set_contact(osip_message_t *msg, const char *contact){
2150         osip_uri_param_t *param = NULL;
2151         osip_contact_t *ct=NULL;
2152         char *line=NULL;
2153         /*we get the line parameter choosed by exosip, and add it to our own contact*/
2154         osip_message_get_contact(msg,0,&ct);
2155         if (ct!=NULL){
2156                 osip_uri_uparam_get_byname(ct->url, "line", &param);
2157                 if (param && param->gvalue)
2158                         line=osip_strdup(param->gvalue);
2159         }
2160         _osip_list_set_empty(&msg->contacts,(void (*)(void*))osip_contact_free);
2161         osip_message_set_contact(msg,contact);
2162         osip_message_get_contact(msg,0,&ct);
2163         osip_uri_uparam_add(ct->url,osip_strdup("line"),line);
2164 }
2165
2166 static void sal_register_add_route(osip_message_t *msg, const char *proxy){
2167         char tmp[256]={0};
2168         snprintf(tmp,sizeof(tmp)-1,"<%s;lr>",proxy);
2169
2170         osip_list_special_free(&msg->routes,(void (*)(void*))osip_route_free);
2171         osip_message_set_route(msg,tmp);
2172 }
2173
2174 int sal_register(SalOp *h, const char *proxy, const char *from, int expires){
2175         osip_message_t *msg;
2176         const char *contact=sal_op_get_contact(h);
2177
2178         sal_op_set_route(h,proxy);
2179         if (h->rid==-1){
2180                 SalAddress *from_parsed=sal_address_new(from);
2181                 char domain[256];
2182                 char *uri, *domain_ptr = NULL;
2183                 if (from_parsed==NULL) {
2184                         ms_warning("sal_register() bad from %s",from);
2185                         return -1;
2186                 }
2187                 /* Get domain using sal_address_as_string_uri_only() and stripping the username part instead of
2188                    using sal_address_get_domain() because to have a properly formatted domain with IPv6 proxy addresses. */
2189                 uri = sal_address_as_string_uri_only(from_parsed);
2190                 if (uri) domain_ptr = strchr(uri, '@');
2191                 if (domain_ptr) {
2192                         snprintf(domain,sizeof(domain),"sip:%s",domain_ptr+1);
2193                 } else {
2194                         snprintf(domain,sizeof(domain),"sip:%s",sal_address_get_domain(from_parsed));
2195                 }
2196                 if (uri) ms_free(uri);
2197                 sal_address_destroy(from_parsed);
2198                 eXosip_lock();
2199                 h->rid=eXosip_register_build_initial_register(from,domain,NULL,expires,&msg);
2200                 if (msg){
2201                         if (contact) register_set_contact(msg,contact);
2202                         sal_register_add_route(msg,proxy);
2203                         sal_add_register(h->base.root,h);
2204                 }else{
2205                         ms_error("Could not build initial register.");
2206                         eXosip_unlock();
2207                         return -1;
2208                 }
2209         }else{
2210                 eXosip_lock();
2211                 eXosip_register_build_register(h->rid,expires,&msg);
2212                 sal_register_add_route(msg,proxy);
2213         }
2214         if (msg)
2215                 eXosip_register_send_register(h->rid,msg);
2216         eXosip_unlock();
2217         h->expires=expires;
2218         return (msg != NULL) ? 0 : -1;
2219 }
2220
2221 int sal_register_refresh(SalOp *op, int expires){
2222         osip_message_t *msg=NULL;
2223         const char *contact=sal_op_get_contact(op);
2224
2225         if (op->rid==-1){
2226                 ms_error("Unexistant registration context, not possible to refresh.");
2227                 return -1;
2228         }
2229         eXosip_lock();
2230         eXosip_register_build_register(op->rid,expires,&msg);
2231         if (msg!=NULL){
2232                 if (contact) register_set_contact(msg,contact);
2233                 sal_register_add_route(msg,sal_op_get_route(op));
2234                 eXosip_register_send_register(op->rid,msg);
2235         }else ms_error("Could not build REGISTER refresh message.");
2236         eXosip_unlock();
2237         return (msg != NULL) ? 0 : -1;
2238 }
2239
2240
2241 int sal_unregister(SalOp *h){
2242         osip_message_t *msg=NULL;
2243         eXosip_lock();
2244         eXosip_register_build_register(h->rid,0,&msg);
2245         if (msg) eXosip_register_send_register(h->rid,msg);
2246         else ms_warning("Could not build unREGISTER !");
2247         eXosip_unlock();
2248         return 0;
2249 }
2250
2251 SalAddress * sal_address_new(const char *uri){
2252         osip_from_t *from;
2253         osip_from_init(&from);
2254
2255         // Remove front spaces
2256         while (uri[0]==' ') {
2257                 uri++;
2258         }
2259
2260         if (osip_from_parse(from,uri)!=0){
2261                 osip_from_free(from);
2262                 return NULL;
2263         }
2264         if (from->displayname!=NULL && from->displayname[0]=='"'){
2265                 char *unquoted=osip_strdup_without_quote(from->displayname);
2266                 osip_free(from->displayname);
2267                 from->displayname=unquoted;
2268         }
2269         return (SalAddress*)from;
2270 }
2271
2272 SalAddress * sal_address_clone(const SalAddress *addr){
2273         osip_from_t *ret=NULL;
2274         osip_from_clone((osip_from_t*)addr,&ret);
2275         return (SalAddress*)ret;
2276 }
2277
2278 #define null_if_empty(s) (((s)!=NULL && (s)[0]!='\0') ? (s) : NULL )
2279
2280 const char *sal_address_get_scheme(const SalAddress *addr){
2281         const osip_from_t *u=(const osip_from_t*)addr;
2282         return null_if_empty(u->url->scheme);
2283 }
2284
2285 const char *sal_address_get_display_name(const SalAddress* addr){
2286         const osip_from_t *u=(const osip_from_t*)addr;
2287         return null_if_empty(u->displayname);
2288 }
2289
2290 const char *sal_address_get_username(const SalAddress *addr){
2291         const osip_from_t *u=(const osip_from_t*)addr;
2292         return null_if_empty(u->url->username);
2293 }
2294
2295 const char *sal_address_get_domain(const SalAddress *addr){
2296         const osip_from_t *u=(const osip_from_t*)addr;
2297         return null_if_empty(u->url->host);
2298 }
2299
2300 void sal_address_set_display_name(SalAddress *addr, const char *display_name){
2301         osip_from_t *u=(osip_from_t*)addr;
2302         if (u->displayname!=NULL){
2303                 osip_free(u->displayname);
2304                 u->displayname=NULL;
2305         }
2306         if (display_name!=NULL && display_name[0]!='\0'){
2307                 u->displayname=osip_strdup(display_name);
2308         }
2309 }
2310
2311 void sal_address_set_username(SalAddress *addr, const char *username){
2312         osip_from_t *uri=(osip_from_t*)addr;
2313         if (uri->url->username!=NULL){
2314                 osip_free(uri->url->username);
2315                 uri->url->username=NULL;
2316         }
2317         if (username)
2318                 uri->url->username=osip_strdup(username);
2319 }
2320
2321 void sal_address_set_domain(SalAddress *addr, const char *host){
2322         osip_from_t *uri=(osip_from_t*)addr;
2323         if (uri->url->host!=NULL){
2324                 osip_free(uri->url->host);
2325                 uri->url->host=NULL;
2326         }
2327         if (host)
2328                 uri->url->host=osip_strdup(host);
2329 }
2330
2331 void sal_address_set_port(SalAddress *addr, const char *port){
2332         osip_from_t *uri=(osip_from_t*)addr;
2333         if (uri->url->port!=NULL){
2334                 osip_free(uri->url->port);
2335                 uri->url->port=NULL;
2336         }
2337         if (port)
2338                 uri->url->port=osip_strdup(port);
2339 }
2340
2341 void sal_address_set_port_int(SalAddress *uri, int port){
2342         char tmp[12];
2343         if (port==5060){
2344                 /*this is the default, special case to leave the port field blank*/
2345                 sal_address_set_port(uri,NULL);
2346                 return;
2347         }
2348         snprintf(tmp,sizeof(tmp),"%i",port);
2349         sal_address_set_port(uri,tmp);
2350 }
2351
2352 void sal_address_clean(SalAddress *addr){
2353         osip_generic_param_freelist(& ((osip_from_t*)addr)->gen_params);
2354         osip_uri_param_freelist(& ((osip_from_t*)addr)->url->url_params);
2355 }
2356
2357 char *sal_address_as_string(const SalAddress *u){
2358         char *tmp,*ret;
2359         osip_from_t *from=(osip_from_t *)u;
2360         char *old_displayname=NULL;
2361         /* hack to force use of quotes around the displayname*/
2362         if (from->displayname!=NULL
2363             && from->displayname[0]!='"'){
2364                 old_displayname=from->displayname;
2365                 from->displayname=osip_enquote(from->displayname);
2366         }
2367         osip_from_to_str(from,&tmp);
2368         if (old_displayname!=NULL){
2369                 ms_free(from->displayname);
2370                 from->displayname=old_displayname;
2371         }
2372         ret=ms_strdup(tmp);
2373         osip_free(tmp);
2374         return ret;
2375 }
2376
2377 char *sal_address_as_string_uri_only(const SalAddress *u){
2378         char *tmp=NULL,*ret;
2379         osip_uri_to_str(((osip_from_t*)u)->url,&tmp);
2380         ret=ms_strdup(tmp);
2381         osip_free(tmp);
2382         return ret;
2383 }
2384 void sal_address_set_param(SalAddress *u,const char* name,const char* value) {
2385         osip_uri_param_t *param=NULL;
2386     osip_uri_uparam_get_byname(((osip_from_t*)u)->url,(char*)name,&param);
2387     if (param == NULL){
2388         osip_uri_uparam_add     (((osip_from_t*)u)->url,ms_strdup(name),value ? ms_strdup(value) : NULL);
2389     } else {
2390         osip_free(param->gvalue);
2391         param->gvalue=value ? osip_strdup(value) : NULL;
2392     }
2393
2394 }
2395
2396 void sal_address_destroy(SalAddress *u){
2397         osip_from_free((osip_from_t*)u);
2398 }
2399
2400 void sal_set_keepalive_period(Sal *ctx,unsigned int value) {
2401         ctx->keepalive_period=value;
2402         eXosip_set_option (EXOSIP_OPT_UDP_KEEP_ALIVE, &value);
2403 }
2404 unsigned int sal_get_keepalive_period(Sal *ctx) {
2405         return ctx->keepalive_period;
2406 }
2407
2408 const char * sal_address_get_port(const SalAddress *addr) {
2409         const osip_from_t *u=(const osip_from_t*)addr;
2410         return null_if_empty(u->url->port);
2411 }
2412
2413 int sal_address_get_port_int(const SalAddress *uri) {
2414         const char* port = sal_address_get_port(uri);
2415         if (port != NULL) {
2416                 return atoi(port);
2417         } else {
2418                 return 5060;
2419         }
2420 }
2421 SalTransport sal_address_get_transport(const SalAddress* addr) {
2422     const osip_from_t *u=(const osip_from_t*)addr;
2423     osip_uri_param_t *transport_param=NULL;
2424     osip_uri_uparam_get_byname(u->url,"transport",&transport_param);
2425     if (transport_param == NULL){
2426         return SalTransportUDP;
2427     }  else {
2428         return sal_transport_parse(transport_param->gvalue);
2429     }
2430 }
2431 void sal_address_set_transport(SalAddress* addr,SalTransport transport) {
2432     sal_address_set_param(addr, "transport", sal_transport_to_string(transport));
2433 }
2434
2435 /* sends a reinvite. Local media description may have changed by application since call establishment*/
2436 int sal_call_update(SalOp *h, const char *subject){
2437         int err=0;
2438         osip_message_t *reinvite=NULL;
2439
2440         eXosip_lock();
2441         if(eXosip_call_build_request(h->did,"INVITE",&reinvite) != 0 || reinvite==NULL){
2442                 eXosip_unlock();
2443                 return -1;
2444         }
2445         eXosip_unlock();
2446         osip_message_set_subject(reinvite,subject);
2447         osip_message_set_allow(reinvite, "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO");
2448         if (h->base.contact){
2449                 _osip_list_set_empty(&reinvite->contacts,(void (*)(void*))osip_contact_free);
2450                 osip_message_set_contact(reinvite,h->base.contact);
2451         }
2452         if (h->base.root->session_expires!=0){
2453                 osip_message_set_header(reinvite, "Session-expires", "200");
2454                 osip_message_set_supported(reinvite, "timer");
2455         }
2456         if (h->base.local_media){
2457                 h->sdp_offering=TRUE;
2458                 set_sdp_from_desc(reinvite,h->base.local_media);
2459         }else h->sdp_offering=FALSE;
2460         eXosip_lock();
2461         err = eXosip_call_send_request(h->did, reinvite);
2462         eXosip_unlock();
2463         return err;
2464 }
2465 void sal_reuse_authorization(Sal *ctx, bool_t value) {
2466         ctx->reuse_authorization=value;
2467 }