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
  25 #include "offeranswer.h"
  26
  27 static void text_received(Sal *sal, eXosip_event_t *ev);
  28
  29 void _osip_list_set_empty(osip_list_t *l, void (*freefunc)(void*)){
  30         void *data;
  31         while((data=osip_list_get(l,0))!=NULL){
  32                 osip_list_remove(l,0);
  33                 freefunc(data);
  34         }
  35 }
  36
  37 void sal_get_default_local_ip(Sal *sal, int address_family,char *ip, size_t iplen){
  38         if (eXosip_guess_localip(address_family,ip,iplen)<0){
  39                 /*default to something */
  40                 strncpy(ip,address_family==AF_INET6 ? "::1" : "127.0.0.1",iplen);
  41                 ms_error("Could not find default routable ip address !");
  42         }
  43 }
  44
  45
  46 static SalOp * sal_find_call(Sal *sal, int cid){
  47         const MSList *elem;
  48         SalOp *op;
  49         for(elem=sal->calls;elem!=NULL;elem=elem->next){
  50                 op=(SalOp*)elem->data;
  51                 if (op->cid==cid) return op;
  52         }
  53         return NULL;
  54 }
  55
  56 static void sal_add_call(Sal *sal, SalOp *op){
  57         sal->calls=ms_list_append(sal->calls,op);
  58 }
  59
  60 static void sal_remove_call(Sal *sal, SalOp *op){
  61         sal->calls=ms_list_remove(sal->calls, op);
  62 }
  63
  64 static SalOp * sal_find_register(Sal *sal, int rid){
  65         const MSList *elem;
  66         SalOp *op;
  67         for(elem=sal->registers;elem!=NULL;elem=elem->next){
  68                 op=(SalOp*)elem->data;
  69                 if (op->rid==rid) return op;
  70         }
  71         return NULL;
  72 }
  73
  74 static void sal_add_register(Sal *sal, SalOp *op){
  75         sal->registers=ms_list_append(sal->registers,op);
  76 }
  77
  78 static void sal_remove_register(Sal *sal, int rid){
  79         MSList *elem;
  80         SalOp *op;
  81         for(elem=sal->registers;elem!=NULL;elem=elem->next){
  82                 op=(SalOp*)elem->data;
  83                 if (op->rid==rid) {
  84                         sal->registers=ms_list_remove_link(sal->registers,elem);
  85                         return;
  86                 }
  87         }
  88 }
  89
  90 static SalOp * sal_find_other(Sal *sal, osip_message_t *response){
  91         const MSList *elem;
  92         SalOp *op;
  93         osip_call_id_t *callid=osip_message_get_call_id(response);
  94         if (callid==NULL) {
  95                 ms_error("There is no call-id in this response !");
  96                 return NULL;
  97         }
  98         for(elem=sal->other_transactions;elem!=NULL;elem=elem->next){
  99                 op=(SalOp*)elem->data;
 100                 if (osip_call_id_match(callid,op->call_id)==0) return op;
 101         }
 102         return NULL;
 103 }
 104
 105 void sal_add_other(Sal *sal, SalOp *op, osip_message_t *request){
 106         osip_call_id_t *callid=osip_message_get_call_id(request);
 107         if (callid==NULL) {
 108                 ms_error("There is no call id in the request !");
 109                 return;
 110         }
 111         osip_call_id_clone(callid,&op->call_id);
 112         sal->other_transactions=ms_list_append(sal->other_transactions,op);
 113 }
 114
 115 static void sal_remove_other(Sal *sal, SalOp *op){
 116         sal->other_transactions=ms_list_remove(sal->other_transactions,op);
 117 }
 118
 119
 120 static void sal_add_pending_auth(Sal *sal, SalOp *op){
 121         sal->pending_auths=ms_list_append(sal->pending_auths,op);
 122 }
 123
 124
 125 static void sal_remove_pending_auth(Sal *sal, SalOp *op){
 126         sal->pending_auths=ms_list_remove(sal->pending_auths,op);
 127 }
 128
 129 void sal_exosip_fix_route(SalOp *op){
 130         if (sal_op_get_route(op)!=NULL){
 131                 osip_route_t *rt=NULL;
 132                 osip_uri_param_t *lr_param=NULL;
 133
 134                 osip_route_init(&rt);
 135                 if (osip_route_parse(rt,sal_op_get_route(op))<0){
 136                         ms_warning("Bad route  %s!",sal_op_get_route(op));
 137                         sal_op_set_route(op,NULL);
 138                 }else{
 139                         /* check if the lr parameter is set , if not add it */
 140                         osip_uri_uparam_get_byname(rt->url, "lr", &lr_param);
 141                         if (lr_param==NULL){
 142                                 char *tmproute;
 143                                 osip_uri_uparam_add(rt->url,osip_strdup("lr"),NULL);
 144                                 osip_route_to_str(rt,&tmproute);
 145                                 sal_op_set_route(op,tmproute);
 146                                 osip_free(tmproute);
 147                         }
 148                 }
 149                 osip_route_free(rt);
 150         }
 151 }
 152
 153 SalOp * sal_op_new(Sal *sal){
 154         SalOp *op=ms_new(SalOp,1);
 155         __sal_op_init(op,sal);
 156         op->cid=op->did=op->tid=op->rid=op->nid=op->sid=-1;
 157         op->result=NULL;
 158         op->supports_session_timers=FALSE;
 159         op->sdp_offering=TRUE;
 160         op->pending_auth=NULL;
 161         op->sdp_answer=NULL;
 162         op->reinvite=FALSE;
 163         op->call_id=NULL;
 164         op->replaces=NULL;
 165         op->referred_by=NULL;
 166         op->masquerade_via=FALSE;
 167         op->auto_answer_asked=FALSE;
 168         return op;
 169 }
 170
 171 bool_t sal_call_autoanswer_asked(SalOp *op)
 172 {
 173         return op->auto_answer_asked;
 174 }
 175
 176 void sal_op_release(SalOp *op){
 177         if (op->sdp_answer)
 178                 sdp_message_free(op->sdp_answer);
 179         if (op->pending_auth)
 180                 eXosip_event_free(op->pending_auth);
 181         if (op->rid!=-1){
 182                 sal_remove_register(op->base.root,op->rid);
 183         }
 184         if (op->cid!=-1){
 185                 ms_message("Cleaning cid %i",op->cid);
 186                 sal_remove_call(op->base.root,op);
 187         }
 188         if (op->sid!=-1){
 189                 sal_remove_out_subscribe(op->base.root,op);
 190         }
 191         if (op->nid!=-1){
 192                 sal_remove_in_subscribe(op->base.root,op);
 193                 if (op->call_id)
 194                         osip_call_id_free(op->call_id);
 195                 op->call_id=NULL;
 196         }
 197         if (op->pending_auth){
 198                 sal_remove_pending_auth(op->base.root,op);
 199         }
 200         if (op->result)
 201                 sal_media_description_unref(op->result);
 202         if (op->call_id){
 203                 sal_remove_other(op->base.root,op);
 204                 osip_call_id_free(op->call_id);
 205         }
 206         if (op->replaces){
 207                 ms_free(op->replaces);
 208         }
 209         if (op->referred_by){
 210                 ms_free(op->referred_by);
 211         }
 212         __sal_op_free(op);
 213 }
 214
 215 static void _osip_trace_func(char *fi, int li, osip_trace_level_t level, char *chfr, va_list ap){
 216         int ortp_level=ORTP_DEBUG;
 217         switch(level){
 218                 case OSIP_INFO1:
 219                 case OSIP_INFO2:
 220                 case OSIP_INFO3:
 221                 case OSIP_INFO4:
 222                         ortp_level=ORTP_MESSAGE;
 223                         break;
 224                 case OSIP_WARNING:
 225                         ortp_level=ORTP_WARNING;
 226                         break;
 227                 case OSIP_ERROR:
 228                 case OSIP_BUG:
 229                         ortp_level=ORTP_ERROR;
 230                         break;
 231                 case OSIP_FATAL:
 232                         ortp_level=ORTP_FATAL;
 233                         break;
 234                 case END_TRACE_LEVEL:
 235                         break;
 236         }
 237         if (ortp_log_level_enabled(level)){
 238                 int len=strlen(chfr);
 239                 char *chfrdup=ortp_strdup(chfr);
 240                 /*need to remove endline*/
 241                 if (len>1){
 242                         if (chfrdup[len-1]=='\n')
 243                                 chfrdup[len-1]='\0';
 244                         if (chfrdup[len-2]=='\r')
 245                                 chfrdup[len-2]='\0';
 246                 }
 247                 ortp_logv(ortp_level,chfrdup,ap);
 248                 ortp_free(chfrdup);
 249         }
 250 }
 251
 252
 253 Sal * sal_init(){
 254         static bool_t firsttime=TRUE;
 255         Sal *sal;
 256         if (firsttime){
 257                 osip_trace_initialize_func (OSIP_INFO4,&_osip_trace_func);
 258                 firsttime=FALSE;
 259         }
 260         eXosip_init();
 261         sal=ms_new0(Sal,1);
 262         sal->keepalive_period=30;
 263         return sal;
 264 }
 265
 266 void sal_uninit(Sal* sal){
 267         eXosip_quit();
 268         ms_free(sal);
 269 }
 270
 271 void sal_set_user_pointer(Sal *sal, void *user_data){
 272         sal->up=user_data;
 273 }
 274
 275 void *sal_get_user_pointer(const Sal *sal){
 276         return sal->up;
 277 }
 278
 279 static void unimplemented_stub(){
 280         ms_warning("Unimplemented SAL callback");
 281 }
 282
 283 void sal_set_callbacks(Sal *ctx, const SalCallbacks *cbs){
 284         memcpy(&ctx->callbacks,cbs,sizeof(*cbs));
 285         if (ctx->callbacks.call_received==NULL)
 286                 ctx->callbacks.call_received=(SalOnCallReceived)unimplemented_stub;
 287         if (ctx->callbacks.call_ringing==NULL)
 288                 ctx->callbacks.call_ringing=(SalOnCallRinging)unimplemented_stub;
 289         if (ctx->callbacks.call_accepted==NULL)
 290                 ctx->callbacks.call_accepted=(SalOnCallAccepted)unimplemented_stub;
 291         if (ctx->callbacks.call_failure==NULL)
 292                 ctx->callbacks.call_failure=(SalOnCallFailure)unimplemented_stub;
 293         if (ctx->callbacks.call_terminated==NULL)
 294                 ctx->callbacks.call_terminated=(SalOnCallTerminated)unimplemented_stub;
 295         if (ctx->callbacks.call_updating==NULL)
 296                 ctx->callbacks.call_updating=(SalOnCallUpdating)unimplemented_stub;
 297         if (ctx->callbacks.auth_requested==NULL)
 298                 ctx->callbacks.auth_requested=(SalOnAuthRequested)unimplemented_stub;
 299         if (ctx->callbacks.auth_success==NULL)
 300                 ctx->callbacks.auth_success=(SalOnAuthSuccess)unimplemented_stub;
 301         if (ctx->callbacks.register_success==NULL)
 302                 ctx->callbacks.register_success=(SalOnRegisterSuccess)unimplemented_stub;
 303         if (ctx->callbacks.register_failure==NULL)
 304                 ctx->callbacks.register_failure=(SalOnRegisterFailure)unimplemented_stub;
 305         if (ctx->callbacks.dtmf_received==NULL)
 306                 ctx->callbacks.dtmf_received=(SalOnDtmfReceived)unimplemented_stub;
 307         if (ctx->callbacks.notify==NULL)
 308                 ctx->callbacks.notify=(SalOnNotify)unimplemented_stub;
 309         if (ctx->callbacks.notify_presence==NULL)
 310                 ctx->callbacks.notify_presence=(SalOnNotifyPresence)unimplemented_stub;
 311         if (ctx->callbacks.subscribe_received==NULL)
 312                 ctx->callbacks.subscribe_received=(SalOnSubscribeReceived)unimplemented_stub;
 313         if (ctx->callbacks.text_received==NULL)
 314                 ctx->callbacks.text_received=(SalOnTextReceived)unimplemented_stub;
 315         if (ctx->callbacks.internal_message==NULL)
 316                 ctx->callbacks.internal_message=(SalOnInternalMsg)unimplemented_stub;
 317         if (ctx->callbacks.ping_reply==NULL)
 318                 ctx->callbacks.ping_reply=(SalOnPingReply)unimplemented_stub;
 319 }
 320
 321 int sal_unlisten_ports(Sal *ctx){
 322         if (ctx->running){
 323                 eXosip_quit();
 324                 eXosip_init();
 325         }
 326         return 0;
 327 }
 328
 329 int sal_listen_port(Sal *ctx, const char *addr, int port, SalTransport tr, int is_secure){
 330         int err;
 331         bool_t ipv6;
 332         int proto=IPPROTO_UDP;
 333
 334         switch (tr) {
 335         case SalTransportDatagram:
 336                 proto=IPPROTO_UDP;
 337                 break;
 338         case SalTransportStream:
 339                 proto= IPPROTO_TCP;
 340                 break;
 341         default:
 342                 ms_warning("unexpected proto, using datagram");
 343         }
 344
 345         err=0;
 346         eXosip_set_option(13,&err); /*13=EXOSIP_OPT_SRV_WITH_NAPTR, as it is an enum value, we can't use it unless we are sure of the
 347                                         version of eXosip, which is not the case*/
 348         /*see if it looks like an IPv6 address*/
 349         ipv6=strchr(addr,':')!=NULL;
 350         eXosip_enable_ipv6(ipv6);
 351
 352         if (is_secure){
 353                 ms_fatal("SIP over TLS or DTLS is not supported yet.");
 354                 return -1;
 355         }
 356         err=eXosip_listen_addr(proto, addr, port, ipv6 ?  PF_INET6 : PF_INET, 0);
 357 #ifdef HAVE_EXOSIP_GET_SOCKET
 358         ms_message("Exosip has socket number %i",eXosip_get_socket(proto));
 359 #endif
 360         eXosip_set_option (EXOSIP_OPT_UDP_KEEP_ALIVE, &ctx->keepalive_period);
 361         ctx->running=TRUE;
 362         return err;
 363 }
 364
 365 ortp_socket_t sal_get_socket(Sal *ctx){
 366 #ifdef HAVE_EXOSIP_GET_SOCKET
 367         return eXosip_get_socket(IPPROTO_UDP);
 368 #else
 369         ms_warning("Sorry, eXosip does not have eXosip_get_socket() method");
 370         return -1;
 371 #endif
 372 }
 373
 374 void sal_set_user_agent(Sal *ctx, const char *user_agent){
 375         eXosip_set_user_agent(user_agent);
 376 }
 377
 378 void sal_use_session_timers(Sal *ctx, int expires){
 379         ctx->session_expires=expires;
 380 }
 381
 382 MSList *sal_get_pending_auths(Sal *sal){
 383         return ms_list_copy(sal->pending_auths);
 384 }
 385
 386 static int extract_received_rport(osip_message_t *msg, const char **received, int *rportval){
 387         osip_via_t *via=NULL;
 388         osip_generic_param_t *param=NULL;
 389         const char *rport=NULL;
 390
 391         *rportval=5060;
 392         *received=NULL;
 393         osip_message_get_via(msg,0,&via);
 394         if (!via) return -1;
 395
 396         /* it is useless to do that with tcp since client socket might have a different port
 397                 than the server socket.
 398         */
 399         if (strcasecmp(via->protocol,"tcp")==0) return -1;
 400
 401         if (via->port && via->port[0]!='\0')
 402                 *rportval=atoi(via->port);
 403
 404         osip_via_param_get_byname(via,"rport",&param);
 405         if (param) {
 406                 rport=param->gvalue;
 407                 if (rport && rport[0]!='\0') *rportval=atoi(rport);
 408                 else *rportval=5060;
 409                 *received=via->host;
 410         }
 411         param=NULL;
 412         osip_via_param_get_byname(via,"received",&param);
 413         if (param) *received=param->gvalue;
 414
 415         if (rport==NULL && *received==NULL) return -1;
 416         return 0;
 417 }
 418
 419 static void set_sdp(osip_message_t *sip,sdp_message_t *msg){
 420         int sdplen;
 421         char clen[10];
 422         char *sdp=NULL;
 423         sdp_message_to_str(msg,&sdp);
 424         sdplen=strlen(sdp);
 425         snprintf(clen,sizeof(clen),"%i",sdplen);
 426         osip_message_set_body(sip,sdp,sdplen);
 427         osip_message_set_content_type(sip,"application/sdp");
 428         osip_message_set_content_length(sip,clen);
 429         osip_free(sdp);
 430 }
 431
 432 static void set_sdp_from_desc(osip_message_t *sip, const SalMediaDescription *desc){
 433         sdp_message_t *msg=media_description_to_sdp(desc);
 434         if (msg==NULL) {
 435                 ms_error("Fail to print sdp message !");
 436                 return;
 437         }
 438         set_sdp(sip,msg);
 439         sdp_message_free(msg);
 440 }
 441
 442 static void sdp_process(SalOp *h){
 443         ms_message("Doing SDP offer/answer process");
 444         if (h->result){
 445                 sal_media_description_unref(h->result);
 446         }
 447         h->result=sal_media_description_new();
 448         if (h->sdp_offering){
 449                 offer_answer_initiate_outgoing(h->base.local_media,h->base.remote_media,h->result);
 450         }else{
 451                 int i;
 452                 offer_answer_initiate_incoming(h->base.local_media,h->base.remote_media,h->result);
 453                 h->sdp_answer=media_description_to_sdp(h->result);
 454                 strcpy(h->result->addr,h->base.remote_media->addr);
 455                 h->result->bandwidth=h->base.remote_media->bandwidth;
 456                 for(i=0;i<h->result->nstreams;++i){
 457                         if (h->result->streams[i].port>0){
 458                                 strcpy(h->result->streams[i].addr,h->base.remote_media->streams[i].addr);
 459                                 h->result->streams[i].ptime=h->base.remote_media->streams[i].ptime;
 460                                 h->result->streams[i].bandwidth=h->base.remote_media->streams[i].bandwidth;
 461                                 h->result->streams[i].port=h->base.remote_media->streams[i].port;
 462                         }
 463                 }
 464         }
 465
 466 }
 467
 468 int sal_call_set_local_media_description(SalOp *h, SalMediaDescription *desc){
 469         if (desc)
 470                 sal_media_description_ref(desc);
 471         if (h->base.local_media)
 472                 sal_media_description_unref(h->base.local_media);
 473         h->base.local_media=desc;
 474         return 0;
 475 }
 476
 477 int sal_call(SalOp *h, const char *from, const char *to){
 478         int err;
 479         osip_message_t *invite=NULL;
 480         sal_op_set_from(h,from);
 481         sal_op_set_to(h,to);
 482         sal_exosip_fix_route(h);
 483         err=eXosip_call_build_initial_invite(&invite,to,from,sal_op_get_route(h),"Phone call");
 484         if (err!=0){
 485                 ms_error("Could not create call.");
 486                 return -1;
 487         }
 488         osip_message_set_allow(invite, "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO");
 489         if (h->base.contact){
 490                 _osip_list_set_empty(&invite->contacts,(void (*)(void*))osip_contact_free);
 491                 osip_message_set_contact(invite,h->base.contact);
 492         }
 493         if (h->base.root->session_expires!=0){
 494                 osip_message_set_header(invite, "Session-expires", "200");
 495                 osip_message_set_supported(invite, "timer");
 496         }
 497         if (h->base.local_media){
 498                 h->sdp_offering=TRUE;
 499                 set_sdp_from_desc(invite,h->base.local_media);
 500         }else h->sdp_offering=FALSE;
 501         if (h->replaces){
 502                 osip_message_set_header(invite,"Replaces",h->replaces);
 503                 if (h->referred_by)
 504                         osip_message_set_header(invite,"Referred-By",h->referred_by);
 505         }
 506
 507         eXosip_lock();
 508         err=eXosip_call_send_initial_invite(invite);
 509         eXosip_unlock();
 510         h->cid=err;
 511         if (err<0){
 512                 ms_error("Fail to send invite !");
 513                 return -1;
 514         }else{
 515                 sal_add_call(h->base.root,h);
 516         }
 517         return 0;
 518 }
 519
 520 int sal_call_notify_ringing(SalOp *h, bool_t early_media){
 521         osip_message_t *msg;
 522         int err;
 523
 524         /*if early media send also 180 and 183 */
 525         if (early_media && h->sdp_answer){
 526                 msg=NULL;
 527                 eXosip_lock();
 528                 err=eXosip_call_build_answer(h->tid,180,&msg);
 529                 if (msg){
 530                         set_sdp(msg,h->sdp_answer);
 531                         eXosip_call_send_answer(h->tid,180,msg);
 532                 }
 533                 msg=NULL;
 534                 err=eXosip_call_build_answer(h->tid,183,&msg);
 535                 if (msg){
 536                         set_sdp(msg,h->sdp_answer);
 537                         eXosip_call_send_answer(h->tid,183,msg);
 538                 }
 539                 eXosip_unlock();
 540         }else{
 541                 eXosip_lock();
 542                 eXosip_call_send_answer(h->tid,180,NULL);
 543                 eXosip_unlock();
 544         }
 545         return 0;
 546 }
 547
 548 int sal_call_accept(SalOp * h){
 549         osip_message_t *msg;
 550         const char *contact=sal_op_get_contact(h);
 551         /* sends a 200 OK */
 552         int err=eXosip_call_build_answer(h->tid,200,&msg);
 553         if (err<0 || msg==NULL){
 554                 ms_error("Fail to build answer for call: err=%i",err);
 555                 return -1;
 556         }
 557         if (h->base.root->session_expires!=0){
 558                 if (h->supports_session_timers) osip_message_set_supported(msg, "timer");
 559         }
 560
 561         if (contact) {
 562                 _osip_list_set_empty(&msg->contacts,(void (*)(void*))osip_contact_free);
 563                 osip_message_set_contact(msg,contact);
 564         }
 565
 566         if (h->base.local_media){
 567                 /*this is the case where we received an invite without SDP*/
 568                 if (h->sdp_offering) {
 569                         set_sdp_from_desc(msg,h->base.local_media);
 570                 }else{
 571                         if (h->sdp_answer){
 572                                 set_sdp(msg,h->sdp_answer);
 573                                 sdp_message_free(h->sdp_answer);
 574                                 h->sdp_answer=NULL;
 575                         }
 576                 }
 577         }else{
 578                 ms_error("You are accepting a call but not defined any media capabilities !");
 579         }
 580         eXosip_call_send_answer(h->tid,200,msg);
 581         return 0;
 582 }
 583
 584 int sal_call_decline(SalOp *h, SalReason reason, const char *redirect){
 585         if (reason==SalReasonBusy){
 586                 eXosip_lock();
 587                 eXosip_call_send_answer(h->tid,486,NULL);
 588                 eXosip_unlock();
 589         }
 590         else if (reason==SalReasonTemporarilyUnavailable){
 591                 eXosip_lock();
 592                 eXosip_call_send_answer(h->tid,480,NULL);
 593                 eXosip_unlock();
 594         }else if (reason==SalReasonDoNotDisturb){
 595                 eXosip_lock();
 596                 eXosip_call_send_answer(h->tid,600,NULL);
 597                 eXosip_unlock();
 598         }else if (reason==SalReasonMedia){
 599                 eXosip_lock();
 600                 eXosip_call_send_answer(h->tid,415,NULL);
 601                 eXosip_unlock();
 602         }else if (redirect!=NULL && reason==SalReasonRedirect){
 603                 osip_message_t *msg;
 604                 int code;
 605                 if (strstr(redirect,"sip:")!=0) code=302;
 606                 else code=380;
 607                 eXosip_lock();
 608                 eXosip_call_build_answer(h->tid,code,&msg);
 609                 osip_message_set_contact(msg,redirect);
 610                 eXosip_call_send_answer(h->tid,code,msg);
 611                 eXosip_unlock();
 612         }else sal_call_terminate(h);
 613         return 0;
 614 }
 615
 616 SalMediaDescription * sal_call_get_final_media_description(SalOp *h){
 617         if (h->base.local_media && h->base.remote_media && !h->result){
 618                 sdp_process(h);
 619         }
 620         return h->result;
 621 }
 622
 623 int sal_call_set_referer(SalOp *h, SalOp *refered_call){
 624         if (refered_call->replaces)
 625                 h->replaces=ms_strdup(refered_call->replaces);
 626         if (refered_call->referred_by)
 627                 h->referred_by=ms_strdup(refered_call->referred_by);
 628         return 0;
 629 }
 630
 631 int sal_ping(SalOp *op, const char *from, const char *to){
 632         osip_message_t *options=NULL;
 633
 634         sal_op_set_from(op,from);
 635         sal_op_set_to(op,to);
 636         eXosip_options_build_request (&options, sal_op_get_to(op),
 637                         sal_op_get_from(op),sal_op_get_route(op));
 638         if (options){
 639                 if (op->base.root->session_expires!=0){
 640                         osip_message_set_header(options, "Session-expires", "200");
 641                         osip_message_set_supported(options, "timer");
 642                 }
 643                 sal_add_other(sal_op_get_sal(op),op,options);
 644                 return eXosip_options_send_request(options);
 645         }
 646         return -1;
 647 }
 648
 649 int sal_call_accept_refer(SalOp *op){
 650         osip_message_t *msg=NULL;
 651         int err=0;
 652         eXosip_lock();
 653         err = eXosip_call_build_notify(op->did,EXOSIP_SUBCRSTATE_ACTIVE,&msg);
 654         if(msg != NULL)
 655         {
 656                 osip_message_set_header(msg,(const char *)"event","refer");
 657                 osip_message_set_content_type(msg,"message/sipfrag");
 658                 osip_message_set_body(msg,"SIP/2.0 100 Trying",sizeof("SIP/2.0 100 Trying"));
 659                 eXosip_call_send_request(op->did,msg);
 660         }
 661         else
 662         {
 663                 ms_error("could not get a notify built\n");
 664         }
 665         eXosip_unlock();
 666         return err;
 667 }
 668
 669 int sal_call_refer(SalOp *h, const char *refer_to){
 670         osip_message_t *msg=NULL;
 671         int err=0;
 672         eXosip_lock();
 673         eXosip_call_build_refer(h->did,refer_to, &msg);
 674         if (msg) err=eXosip_call_send_request(h->did, msg);
 675         else err=-1;
 676         eXosip_unlock();
 677         return err;
 678 }
 679
 680 int sal_call_refer_with_replaces(SalOp *h, SalOp *other_call_h){
 681         osip_message_t *msg=NULL;
 682         char referto[256]={0};
 683         int err=0;
 684         eXosip_lock();
 685         if (eXosip_call_get_referto(other_call_h->did,referto,sizeof(referto)-1)!=0){
 686                 ms_error("eXosip_call_get_referto() failed for did=%i",other_call_h->did);
 687                 eXosip_unlock();
 688                 return -1;
 689         }
 690         eXosip_call_build_refer(h->did,referto, &msg);
 691         osip_message_set_header(msg,"Referred-By",h->base.from);
 692         if (msg) err=eXosip_call_send_request(h->did, msg);
 693         else err=-1;
 694         eXosip_unlock();
 695         return err;
 696 }
 697
 698 SalOp *sal_call_get_replaces(SalOp *h){
 699         if (h->replaces!=NULL){
 700                 int cid;
 701                 eXosip_lock();
 702                 cid=eXosip_call_find_by_replaces(h->replaces);
 703                 eXosip_unlock();
 704                 if (cid>0){
 705                         SalOp *ret=sal_find_call(h->base.root,cid);
 706                         return ret;
 707                 }
 708         }
 709         return NULL;
 710 }
 711
 712 int sal_call_send_dtmf(SalOp *h, char dtmf){
 713         osip_message_t *msg=NULL;
 714         char dtmf_body[128];
 715         char clen[10];
 716
 717         eXosip_lock();
 718         eXosip_call_build_info(h->did,&msg);
 719         if (msg){
 720                 snprintf(dtmf_body, sizeof(dtmf_body), "Signal=%c\r\nDuration=250\r\n", dtmf);
 721                 osip_message_set_body(msg,dtmf_body,strlen(dtmf_body));
 722                 osip_message_set_content_type(msg,"application/dtmf-relay");
 723                 snprintf(clen,sizeof(clen),"%lu",(unsigned long)strlen(dtmf_body));
 724                 osip_message_set_content_length(msg,clen);
 725                 eXosip_call_send_request(h->did,msg);
 726         }
 727         eXosip_unlock();
 728         return 0;
 729 }
 730
 731 int sal_call_terminate(SalOp *h){
 732         int err;
 733         eXosip_lock();
 734         err=eXosip_call_terminate(h->cid,h->did);
 735         eXosip_unlock();
 736         if (err!=0){
 737                 ms_warning("Exosip could not terminate the call: cid=%i did=%i", h->cid,h->did);
 738         }
 739         sal_remove_call(h->base.root,h);
 740         h->cid=-1;
 741         return 0;
 742 }
 743
 744 void sal_op_authenticate(SalOp *h, const SalAuthInfo *info){
 745         if (h->pending_auth){
 746                 const char *userid;
 747                 if (info->userid==NULL || info->userid[0]=='\0') userid=info->username;
 748                 else userid=info->userid;
 749                 ms_message("Authentication info for %s %s added to eXosip", info->username,info->realm);
 750                 eXosip_add_authentication_info (info->username,userid,
 751                                       info->password, NULL,info->realm);
 752                 eXosip_lock();
 753                 eXosip_default_action(h->pending_auth);
 754                 eXosip_unlock();
 755                 ms_message("eXosip_default_action() done");
 756                 eXosip_clear_authentication_info();
 757                 eXosip_event_free(h->pending_auth);
 758                 sal_remove_pending_auth(sal_op_get_sal(h),h);
 759                 h->pending_auth=NULL;
 760         }
 761 }
 762
 763 static void set_network_origin(SalOp *op, osip_message_t *req){
 764         const char *received=NULL;
 765         int rport=5060;
 766         char origin[64];
 767         if (extract_received_rport(req,&received,&rport)!=0){
 768                 osip_via_t *via=NULL;
 769                 char *tmp;
 770                 osip_message_get_via(req,0,&via);
 771                 received=osip_via_get_host(via);
 772                 tmp=osip_via_get_port(via);
 773                 if (tmp) rport=atoi(tmp);
 774         }
 775         snprintf(origin,sizeof(origin)-1,"sip:%s:%i",received,rport);
 776         __sal_op_set_network_origin(op,origin);
 777 }
 778
 779 static void set_remote_ua(SalOp* op, osip_message_t *req){
 780         if (op->base.remote_ua==NULL){
 781                 osip_header_t *h=NULL;
 782                 osip_message_get_user_agent(req,0,&h);
 783                 if (h){
 784                         op->base.remote_ua=ms_strdup(h->hvalue);
 785                 }
 786         }
 787 }
 788
 789 static void set_replaces(SalOp *op, osip_message_t *req){
 790         osip_header_t *h=NULL;
 791
 792         if (op->replaces){
 793                 ms_free(op->replaces);
 794                 op->replaces=NULL;
 795         }
 796         osip_message_header_get_byname(req,"replaces",0,&h);
 797         if (h){
 798                 if (h->hvalue && h->hvalue[0]!='\0'){
 799                         op->replaces=ms_strdup(h->hvalue);
 800                 }
 801         }
 802 }
 803
 804 static SalOp *find_op(Sal *sal, eXosip_event_t *ev){
 805         if (ev->cid>0){
 806                 return sal_find_call(sal,ev->cid);
 807         }
 808         if (ev->rid>0){
 809                 return sal_find_register(sal,ev->rid);
 810         }
 811         if (ev->sid>0){
 812                 return sal_find_out_subscribe(sal,ev->sid);
 813         }
 814         if (ev->response) return sal_find_other(sal,ev->response);
 815         return NULL;
 816 }
 817
 818 static void inc_new_call(Sal *sal, eXosip_event_t *ev){
 819         SalOp *op=sal_op_new(sal);
 820         osip_from_t *from,*to;
 821         osip_call_info_t *call_info;
 822         char *tmp;
 823         sdp_message_t *sdp=eXosip_get_sdp_info(ev->request);
 824
 825         set_network_origin(op,ev->request);
 826         set_remote_ua(op,ev->request);
 827         set_replaces(op,ev->request);
 828
 829         if (sdp){
 830                 op->sdp_offering=FALSE;
 831                 op->base.remote_media=sal_media_description_new();
 832                 sdp_to_media_description(sdp,op->base.remote_media);
 833                 sdp_message_free(sdp);
 834         }else op->sdp_offering=TRUE;
 835
 836         from=osip_message_get_from(ev->request);
 837         to=osip_message_get_to(ev->request);
 838         osip_from_to_str(from,&tmp);
 839         sal_op_set_from(op,tmp);
 840         osip_free(tmp);
 841         osip_from_to_str(to,&tmp);
 842         sal_op_set_to(op,tmp);
 843         osip_free(tmp);
 844
 845         osip_message_get_call_info(ev->request,0,&call_info);
 846         if(call_info)
 847         {
 848                 osip_call_info_to_str(call_info,&tmp);
 849                 if( strstr(tmp,"answer-after=") != NULL)
 850                 {
 851                         op->auto_answer_asked=TRUE;
 852                         ms_message("The caller asked to automatically answer the call(Emergency?)\n");
 853                 }
 854                 osip_free(tmp);
 855         }
 856
 857         op->tid=ev->tid;
 858         op->cid=ev->cid;
 859         op->did=ev->did;
 860
 861         sal_add_call(op->base.root,op);
 862         sal->callbacks.call_received(op);
 863 }
 864
 865 static void handle_reinvite(Sal *sal,  eXosip_event_t *ev){
 866         SalOp *op=find_op(sal,ev);
 867         sdp_message_t *sdp;
 868         osip_message_t *msg=NULL;
 869
 870         if (op==NULL) {
 871                 ms_warning("Reinvite for non-existing operation !");
 872                 return;
 873         }
 874         op->reinvite=TRUE;
 875         op->tid=ev->tid;
 876         sdp=eXosip_get_sdp_info(ev->request);
 877         if (op->base.remote_media){
 878                 sal_media_description_unref(op->base.remote_media);
 879                 op->base.remote_media=NULL;
 880         }
 881         if (op->result){
 882                 sal_media_description_unref(op->result);
 883                 op->result=NULL;
 884         }
 885         if (sdp){
 886                 op->sdp_offering=FALSE;
 887                 op->base.remote_media=sal_media_description_new();
 888                 sdp_to_media_description(sdp,op->base.remote_media);
 889                 sdp_message_free(sdp);
 890                 sal->callbacks.call_updating(op);
 891         }else {
 892                 op->sdp_offering=TRUE;
 893                 eXosip_lock();
 894                 eXosip_call_build_answer(ev->tid,200,&msg);
 895                 if (msg!=NULL){
 896                         set_sdp_from_desc(msg,op->base.local_media);
 897                         eXosip_call_send_answer(ev->tid,200,msg);
 898                 }
 899                 eXosip_unlock();
 900         }
 901
 902 }
 903
 904 static void handle_ack(Sal *sal,  eXosip_event_t *ev){
 905         SalOp *op=find_op(sal,ev);
 906         sdp_message_t *sdp;
 907
 908         if (op==NULL) {
 909                 ms_warning("ack for non-existing call !");
 910                 return;
 911         }
 912         sdp=eXosip_get_sdp_info(ev->ack);
 913         if (sdp){
 914                 op->base.remote_media=sal_media_description_new();
 915                 sdp_to_media_description(sdp,op->base.remote_media);
 916                 sdp_process(op);
 917                 sdp_message_free(sdp);
 918         }
 919         if (op->reinvite){
 920                 if (sdp) sal->callbacks.call_updating(op);
 921                 op->reinvite=FALSE;
 922         }else{
 923                 sal->callbacks.call_ack(op);
 924         }
 925 }
 926
 927 static void update_contact_from_response(SalOp *op, osip_message_t *response){
 928         const char *received;
 929         int rport;
 930         if (extract_received_rport(response,&received,&rport)==0){
 931                 const char *contact=sal_op_get_contact(op);
 932                 if (!contact){
 933                         /*no contact given yet, use from instead*/
 934                         contact=sal_op_get_from(op);
 935                 }
 936                 if (contact){
 937                         SalAddress *addr=sal_address_new(contact);
 938                         char *tmp;
 939                         sal_address_set_domain(addr,received);
 940                         sal_address_set_port_int(addr,rport);
 941                         tmp=sal_address_as_string(addr);
 942                         ms_message("Contact address updated to %s for this dialog",tmp);
 943                         sal_op_set_contact(op,tmp);
 944                         ms_free(tmp);
 945                 }
 946         }
 947 }
 948
 949 static int call_proceeding(Sal *sal, eXosip_event_t *ev){
 950         SalOp *op=find_op(sal,ev);
 951
 952         if (op==NULL) {
 953                 ms_warning("This call has been canceled.");
 954                 eXosip_lock();
 955                 eXosip_call_terminate(ev->cid,ev->did);
 956                 eXosip_unlock();
 957                 return -1;
 958         }
 959         if (ev->did>0)
 960                 op->did=ev->did;
 961         op->tid=ev->tid;
 962
 963         /* update contact if received and rport are set by the server
 964          note: will only be used by remote for next INVITE, if any...*/
 965         update_contact_from_response(op,ev->response);
 966         return 0;
 967 }
 968
 969 static void call_ringing(Sal *sal, eXosip_event_t *ev){
 970         sdp_message_t *sdp;
 971         SalOp *op=find_op(sal,ev);
 972         if (call_proceeding(sal, ev)==-1) return;
 973
 974         set_remote_ua(op,ev->response);
 975         sdp=eXosip_get_sdp_info(ev->response);
 976         if (sdp){
 977                 op->base.remote_media=sal_media_description_new();
 978                 sdp_to_media_description(sdp,op->base.remote_media);
 979                 sdp_message_free(sdp);
 980                 if (op->base.local_media) sdp_process(op);
 981         }
 982         sal->callbacks.call_ringing(op);
 983 }
 984
 985 static void call_accepted(Sal *sal, eXosip_event_t *ev){
 986         sdp_message_t *sdp;
 987         osip_message_t *msg=NULL;
 988         SalOp *op=find_op(sal,ev);
 989         const char *contact;
 990
 991         if (op==NULL){
 992                 ms_error("A closed call is accepted ?");
 993                 return;
 994         }
 995
 996         op->did=ev->did;
 997         set_remote_ua(op,ev->response);
 998
 999         sdp=eXosip_get_sdp_info(ev->response);
1000         if (sdp){
1001                 op->base.remote_media=sal_media_description_new();
1002                 sdp_to_media_description(sdp,op->base.remote_media);
1003                 sdp_message_free(sdp);
1004                 if (op->base.local_media) sdp_process(op);
1005         }
1006         eXosip_call_build_ack(ev->did,&msg);
1007         contact=sal_op_get_contact(op);
1008         if (contact) {
1009                 _osip_list_set_empty(&msg->contacts,(void (*)(void*))osip_contact_free);
1010                 osip_message_set_contact(msg,contact);
1011         }
1012         if (op->sdp_answer){
1013                 set_sdp(msg,op->sdp_answer);
1014                 sdp_message_free(op->sdp_answer);
1015                 op->sdp_answer=NULL;
1016         }
1017         eXosip_call_send_ack(ev->did,msg);
1018         sal->callbacks.call_accepted(op);
1019 }
1020
1021 static void call_terminated(Sal *sal, eXosip_event_t *ev){
1022         char *from=NULL;
1023         SalOp *op=find_op(sal,ev);
1024         if (op==NULL){
1025                 ms_warning("Call terminated for already closed call ?");
1026                 return;
1027         }
1028         if (ev->request){
1029                 osip_from_to_str(ev->request->from,&from);
1030         }
1031         sal_remove_call(sal,op);
1032         op->cid=-1;
1033         sal->callbacks.call_terminated(op,from!=NULL ? from : sal_op_get_from(op));
1034         if (from) osip_free(from);
1035 }
1036
1037 static void call_released(Sal *sal, eXosip_event_t *ev){
1038         SalOp *op=find_op(sal,ev);
1039         if (op==NULL){
1040                 ms_warning("No op associated to this call_released()");
1041                 return;
1042         }
1043         op->cid=-1;
1044         if (op->did==-1)
1045                 sal->callbacks.call_failure(op,SalErrorNoResponse,SalReasonUnknown,NULL, 487);
1046 }
1047
1048 static int get_auth_data_from_response(osip_message_t *resp, const char **realm, const char **username){
1049         const char *prx_realm=NULL,*www_realm=NULL;
1050         osip_proxy_authenticate_t *prx_auth;
1051         osip_www_authenticate_t *www_auth;
1052
1053         *username=osip_uri_get_username(resp->from->url);
1054         prx_auth=(osip_proxy_authenticate_t*)osip_list_get(&resp->proxy_authenticates,0);
1055         www_auth=(osip_proxy_authenticate_t*)osip_list_get(&resp->www_authenticates,0);
1056         if (prx_auth!=NULL)
1057                 prx_realm=osip_proxy_authenticate_get_realm(prx_auth);
1058         if (www_auth!=NULL)
1059                 www_realm=osip_www_authenticate_get_realm(www_auth);
1060
1061         if (prx_realm){
1062                 *realm=prx_realm;
1063         }else if (www_realm){
1064                 *realm=www_realm;
1065         }else{
1066                 return -1;
1067         }
1068         return 0;
1069 }
1070
1071 static int get_auth_data_from_request(osip_message_t *msg, const char **realm, const char **username){
1072         osip_authorization_t *auth=NULL;
1073         osip_proxy_authorization_t *prx_auth=NULL;
1074
1075         *username=osip_uri_get_username(msg->from->url);
1076         osip_message_get_authorization(msg, 0, &auth);
1077         if (auth){
1078                 *realm=osip_authorization_get_realm(auth);
1079                 return 0;
1080         }
1081         osip_message_get_proxy_authorization(msg,0,&prx_auth);
1082         if (prx_auth){
1083                 *realm=osip_proxy_authorization_get_realm(prx_auth);
1084                 return 0;
1085         }
1086         return -1;
1087 }
1088
1089 static int get_auth_data(eXosip_event_t *ev, const char **realm, const char **username){
1090         if (ev->response && get_auth_data_from_response(ev->response,realm,username)==0) return 0;
1091         if (ev->request && get_auth_data_from_request(ev->request,realm,username)==0) return 0;
1092         return -1;
1093 }
1094
1095 int sal_op_get_auth_requested(SalOp *op, const char **realm, const char **username){
1096         if (op->pending_auth){
1097                 return get_auth_data(op->pending_auth,realm,username);
1098         }
1099         return -1;
1100 }
1101
1102 static bool_t process_authentication(Sal *sal, eXosip_event_t *ev){
1103         SalOp *op;
1104         const char *username,*realm;
1105         op=find_op(sal,ev);
1106         if (op==NULL){
1107                 ms_warning("No operation associated with this authentication !");
1108                 return TRUE;
1109         }
1110         if (get_auth_data(ev,&realm,&username)==0){
1111                 if (op->pending_auth!=NULL)
1112                         eXosip_event_free(op->pending_auth);
1113                 op->pending_auth=ev;
1114                 sal_add_pending_auth (sal,op);
1115                 sal->callbacks.auth_requested(op,realm,username);
1116                 return FALSE;
1117         }
1118         return TRUE;
1119 }
1120
1121 static void authentication_ok(Sal *sal, eXosip_event_t *ev){
1122         SalOp *op;
1123         const char *username,*realm;
1124         op=find_op(sal,ev);
1125         if (op==NULL){
1126                 ms_warning("No operation associated with this authentication_ok!");
1127                 return ;
1128         }
1129         if (get_auth_data(ev,&realm,&username)==0){
1130                 sal->callbacks.auth_success(op,realm,username);
1131         }
1132 }
1133
1134 static bool_t call_failure(Sal *sal, eXosip_event_t *ev){
1135         SalOp *op;
1136         int code=0;
1137         char* computedReason=NULL;
1138         const char *reason=NULL;
1139         SalError error=SalErrorUnknown;
1140         SalReason sr=SalReasonUnknown;
1141
1142
1143         op=(SalOp*)find_op(sal,ev);
1144
1145         if (op==NULL) {
1146                 ms_warning("Call failure reported for a closed call, ignored.");
1147                 return TRUE;
1148         }
1149
1150         if (ev->response){
1151                 code=osip_message_get_status_code(ev->response);
1152                 reason=osip_message_get_reason_phrase(ev->response);
1153                 osip_header_t *h=NULL;
1154                 if (!osip_message_header_get_byname(    ev->response
1155                                                                                         ,"Reason"
1156                                                                                         ,0
1157                                                                                         ,&h)) {
1158                         computedReason = ms_strdup_printf("%s %s",reason,osip_header_get_value(h));
1159                         reason = computedReason;
1160
1161                 }
1162         }
1163         switch(code)
1164         {
1165                 case 401:
1166                 case 407:
1167                         return process_authentication(sal,ev);
1168                         break;
1169                 case 400:
1170                         error=SalErrorUnknown;
1171                 break;
1172                 case 404:
1173                         error=SalErrorFailure;
1174                         sr=SalReasonNotFound;
1175                 break;
1176                 case 415:
1177                         error=SalErrorFailure;
1178                         sr=SalReasonMedia;
1179                 break;
1180                 case 422:
1181                         eXosip_default_action(ev);
1182                         return TRUE;
1183                 break;
1184                 case 480:
1185                         error=SalErrorFailure;
1186                         sr=SalReasonTemporarilyUnavailable;
1187                 case 486:
1188                         error=SalErrorFailure;
1189                         sr=SalReasonBusy;
1190                 break;
1191                 case 487:
1192                 break;
1193                 case 600:
1194                         error=SalErrorFailure;
1195                         sr=SalReasonDoNotDisturb;
1196                 break;
1197                 case 603:
1198                         error=SalErrorFailure;
1199                         sr=SalReasonDeclined;
1200                 break;
1201                 default:
1202                         if (code>0){
1203                                 error=SalErrorFailure;
1204                                 sr=SalReasonUnknown;
1205                         }else error=SalErrorNoResponse;
1206         }
1207         sal->callbacks.call_failure(op,error,sr,reason,code);
1208         if (computedReason != NULL){
1209                 ms_free(computedReason);
1210         }
1211         return TRUE;
1212 }
1213
1214
1215 static void process_media_control_xml(Sal *sal, eXosip_event_t *ev){
1216         SalOp *op=find_op(sal,ev);
1217         osip_body_t *body=NULL;
1218
1219         if (op==NULL){
1220                 ms_warning("media control xml received without operation context!");
1221                 return ;
1222         }
1223
1224         osip_message_get_body(ev->request,0,&body);
1225         if (body && body->body!=NULL &&
1226                 strstr(body->body,"picture_fast_update")){
1227                 osip_message_t *ans=NULL;
1228                 ms_message("Receiving VFU request !");
1229                 if (sal->callbacks.vfu_request){
1230                         sal->callbacks.vfu_request(op);
1231                         eXosip_call_build_answer(ev->tid,200,&ans);
1232                         if (ans)
1233                                 eXosip_call_send_answer(ev->tid,200,ans);
1234                         return;
1235                 }
1236         }
1237         /*in all other cases we must say it is not implemented.*/
1238         {
1239                 osip_message_t *ans=NULL;
1240                 eXosip_lock();
1241                 eXosip_call_build_answer(ev->tid,501,&ans);
1242                 if (ans)
1243                         eXosip_call_send_answer(ev->tid,501,ans);
1244                 eXosip_unlock();
1245         }
1246 }
1247
1248 static void process_dtmf_relay(Sal *sal, eXosip_event_t *ev){
1249         SalOp *op=find_op(sal,ev);
1250         osip_body_t *body=NULL;
1251
1252         if (op==NULL){
1253                 ms_warning("media dtmf relay received without operation context!");
1254                 return ;
1255         }
1256
1257         osip_message_get_body(ev->request,0,&body);
1258         if (body && body->body!=NULL){
1259                 osip_message_t *ans=NULL;
1260                 const char *name=strstr(body->body,"Signal");
1261                 if (name==NULL) name=strstr(body->body,"signal");
1262                 if (name==NULL) {
1263                         ms_warning("Could not extract the dtmf name from the SIP INFO.");
1264                 }else{
1265                         char tmp[2];
1266                         name+=strlen("signal");
1267                         if (sscanf(name," = %1s",tmp)==1){
1268                                 ms_message("Receiving dtmf %s via SIP INFO.",tmp);
1269                                 if (sal->callbacks.dtmf_received != NULL)
1270                                         sal->callbacks.dtmf_received(op, tmp[0]);
1271                         }
1272                 }
1273                 eXosip_call_build_answer(ev->tid,200,&ans);
1274                 if (ans)
1275                         eXosip_call_send_answer(ev->tid,200,ans);
1276         }
1277 }
1278
1279 static void fill_options_answer(osip_message_t *options){
1280         osip_message_set_allow(options,"INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, SUBSCRIBE, NOTIFY, INFO");
1281         osip_message_set_accept(options,"application/sdp");
1282 }
1283
1284 static void process_refer(Sal *sal, SalOp *op, eXosip_event_t *ev){
1285         osip_header_t *h=NULL;
1286         osip_message_t *ans=NULL;
1287         ms_message("Receiving REFER request !");
1288         osip_message_header_get_byname(ev->request,"Refer-To",0,&h);
1289
1290         if (h){
1291                 osip_from_t *from=NULL;
1292                 char *tmp;
1293                 osip_from_init(&from);
1294
1295                 if (osip_from_parse(from,h->hvalue)==0){
1296                         if (op ){
1297                                 osip_uri_header_t *uh=NULL;
1298                                 osip_header_t *referred_by=NULL;
1299                                 osip_uri_header_get_byname(&from->url->url_headers,(char*)"Replaces",&uh);
1300                                 if (uh!=NULL && uh->gvalue && uh->gvalue[0]!='\0'){
1301                                         ms_message("Found replaces in Refer-To");
1302                                         if (op->replaces){
1303                                                 ms_free(op->replaces);
1304                                         }
1305                                         op->replaces=ms_strdup(uh->gvalue);
1306                                 }
1307                                 osip_message_header_get_byname(ev->request,"Referred-By",0,&referred_by);
1308                                 if (referred_by && referred_by->hvalue && referred_by->hvalue[0]!='\0'){
1309                                         if (op->referred_by)
1310                                                 ms_free(op->referred_by);
1311                                         op->referred_by=ms_strdup(referred_by->hvalue);
1312                                 }
1313                         }
1314                         osip_uri_header_freelist(&from->url->url_headers);
1315                         osip_from_to_str(from,&tmp);
1316                         sal->callbacks.refer_received(sal,op,tmp);
1317                         osip_free(tmp);
1318                         osip_from_free(from);
1319                 }
1320                 eXosip_lock();
1321                 eXosip_call_build_answer(ev->tid,202,&ans);
1322                 if (ans)
1323                         eXosip_call_send_answer(ev->tid,202,ans);
1324                 eXosip_unlock();
1325         }
1326         else
1327         {
1328                 ms_warning("cannot do anything with the refer without destination\n");
1329         }
1330 }
1331
1332 static void call_message_new(Sal *sal, eXosip_event_t *ev){
1333         osip_message_t *ans=NULL;
1334         if (ev->request){
1335                 if (MSG_IS_INFO(ev->request)){
1336                         osip_content_type_t *ct;
1337                         ct=osip_message_get_content_type(ev->request);
1338                         if (ct && ct->subtype){
1339                                 if (strcmp(ct->subtype,"media_control+xml")==0)
1340                                         process_media_control_xml(sal,ev);
1341                                 else if (strcmp(ct->subtype,"dtmf-relay")==0)
1342                                         process_dtmf_relay(sal,ev);
1343                                 else {
1344                                         ms_message("Unhandled SIP INFO.");
1345                                         /*send an "Not implemented" answer*/
1346                                         eXosip_lock();
1347                                         eXosip_call_build_answer(ev->tid,501,&ans);
1348                                         if (ans)
1349                                                 eXosip_call_send_answer(ev->tid,501,ans);
1350                                         eXosip_unlock();
1351                                 }
1352                         }else{
1353                                 /*empty SIP INFO, probably to test we are alive. Send an empty answer*/
1354                                 eXosip_lock();
1355                                 eXosip_call_build_answer(ev->tid,200,&ans);
1356                                 if (ans)
1357                                         eXosip_call_send_answer(ev->tid,200,ans);
1358                                 eXosip_unlock();
1359                         }
1360                 }else if(MSG_IS_MESSAGE(ev->request)){
1361                         /* SIP messages could be received into call */
1362                         text_received(sal, ev);
1363                         eXosip_lock();
1364                         eXosip_call_build_answer(ev->tid,200,&ans);
1365                         if (ans)
1366                                 eXosip_call_send_answer(ev->tid,200,ans);
1367                         eXosip_unlock();
1368                 }else if(MSG_IS_REFER(ev->request)){
1369                         SalOp *op=find_op(sal,ev);
1370
1371                         ms_message("Receiving REFER request !");
1372                         process_refer(sal,op,ev);
1373                 }else if(MSG_IS_NOTIFY(ev->request)){
1374                         osip_header_t *h=NULL;
1375                         char *from=NULL;
1376                         SalOp *op=find_op(sal,ev);
1377
1378                         ms_message("Receiving NOTIFY request !");
1379                         osip_from_to_str(ev->request->from,&from);
1380                         osip_message_header_get_byname(ev->request,"Event",0,&h);
1381                         if(h)
1382                                 sal->callbacks.notify(op,from,h->hvalue);
1383                         /*answer that we received the notify*/
1384                         eXosip_lock();
1385                         eXosip_call_build_answer(ev->tid,200,&ans);
1386                         if (ans)
1387                                 eXosip_call_send_answer(ev->tid,200,ans);
1388                         eXosip_unlock();
1389                         osip_free(from);
1390                 }else if (MSG_IS_OPTIONS(ev->request)){
1391                         eXosip_lock();
1392                         eXosip_call_build_answer(ev->tid,200,&ans);
1393                         if (ans){
1394                                 fill_options_answer(ans);
1395                                 eXosip_call_send_answer(ev->tid,200,ans);
1396                         }
1397                         eXosip_unlock();
1398                 }
1399         }else ms_warning("call_message_new: No request ?");
1400 }
1401
1402 static void inc_update(Sal *sal, eXosip_event_t *ev){
1403         osip_message_t *msg=NULL;
1404         ms_message("Processing incoming UPDATE");
1405         eXosip_lock();
1406         eXosip_message_build_answer(ev->tid,200,&msg);
1407         if (msg!=NULL)
1408                 eXosip_message_send_answer(ev->tid,200,msg);
1409         eXosip_unlock();
1410 }
1411
1412 static bool_t comes_from_local_if(osip_message_t *msg){
1413         osip_via_t *via=NULL;
1414         osip_message_get_via(msg,0,&via);
1415         if (via){
1416                 const char *host;
1417                 host=osip_via_get_host(via);
1418                 if (strcmp(host,"127.0.0.1")==0 || strcmp(host,"::1")==0){
1419                         osip_generic_param_t *param=NULL;
1420                         osip_via_param_get_byname(via,"received",&param);
1421                         if (param==NULL) return TRUE;
1422                         if (param->gvalue &&
1423                                 (strcmp(param->gvalue,"127.0.0.1")==0 || strcmp(param->gvalue,"::1")==0)){
1424                                 return TRUE;
1425                         }
1426                 }
1427         }
1428         return FALSE;
1429 }
1430
1431 static void text_received(Sal *sal, eXosip_event_t *ev){
1432         osip_body_t *body=NULL;
1433         char *from=NULL,*msg;
1434
1435         osip_message_get_body(ev->request,0,&body);
1436         if (body==NULL){
1437                 ms_error("Could not get text message from SIP body");
1438                 return;
1439         }
1440         msg=body->body;
1441         osip_from_to_str(ev->request->from,&from);
1442         sal->callbacks.text_received(sal,from,msg);
1443         osip_free(from);
1444 }
1445
1446
1447
1448 static void other_request(Sal *sal, eXosip_event_t *ev){
1449         ms_message("in other_request");
1450         if (ev->request==NULL) return;
1451         if (strcmp(ev->request->sip_method,"MESSAGE")==0){
1452                 text_received(sal,ev);
1453                 eXosip_message_send_answer(ev->tid,200,NULL);
1454         }else if (strcmp(ev->request->sip_method,"OPTIONS")==0){
1455                 osip_message_t *options=NULL;
1456                 eXosip_options_build_answer(ev->tid,200,&options);
1457                 fill_options_answer(options);
1458                 eXosip_options_send_answer(ev->tid,200,options);
1459         }else if (strcmp(ev->request->sip_method,"WAKEUP")==0
1460                 && comes_from_local_if(ev->request)) {
1461                 eXosip_message_send_answer(ev->tid,200,NULL);
1462                 ms_message("Receiving WAKEUP request !");
1463                 sal->callbacks.internal_message(sal,"WAKEUP");
1464         }else if (strncmp(ev->request->sip_method, "REFER", 5) == 0){
1465                 ms_message("Receiving REFER request !");
1466                 if (comes_from_local_if(ev->request)) {
1467                         process_refer(sal,NULL,ev);
1468                 }else ms_warning("Ignored REFER not coming from this local loopback interface.");
1469         }else if (strncmp(ev->request->sip_method, "UPDATE", 6) == 0){
1470                 inc_update(sal,ev);
1471     }else {
1472                 char *tmp=NULL;
1473                 size_t msglen=0;
1474                 osip_message_to_str(ev->request,&tmp,&msglen);
1475                 if (tmp){
1476                         ms_message("Unsupported request received:\n%s",tmp);
1477                         osip_free(tmp);
1478                 }
1479                 /*answer with a 501 Not implemented*/
1480                 eXosip_message_send_answer(ev->tid,501,NULL);
1481         }
1482 }
1483
1484 static void masquerade_via(osip_message_t *msg, const char *ip, const char *port){
1485         osip_via_t *via=NULL;
1486         osip_message_get_via(msg,0,&via);
1487         if (via){
1488                 osip_free(via->port);
1489                 via->port=osip_strdup(port);
1490                 osip_free(via->host);
1491                 via->host=osip_strdup(ip);
1492         }
1493 }
1494
1495 static bool_t register_again_with_updated_contact(SalOp *op, osip_message_t *orig_request, osip_message_t *last_answer){
1496         osip_message_t *msg;
1497         const char *received;
1498         int rport;
1499         osip_contact_t *ctt=NULL;
1500         char *tmp;
1501         char port[20];
1502         SalAddress *addr;
1503
1504         if (extract_received_rport(last_answer,&received,&rport)==-1) return FALSE;
1505         osip_message_get_contact(orig_request,0,&ctt);
1506         if (strcmp(ctt->url->host,received)==0){
1507                 /*ip address matches, check ports*/
1508                 const char *contact_port=ctt->url->port;
1509                 if (contact_port==NULL || contact_port[0]=='\0')
1510                         contact_port="5060";
1511                 if (atoi(contact_port)==rport){
1512                         ms_message("Register has up to date contact, doing nothing.");
1513                         return FALSE;
1514                 }else ms_message("ports do not match, need to update the register (%s <> %i)", contact_port,rport);
1515         }
1516         eXosip_lock();
1517         msg=NULL;
1518         eXosip_register_build_register(op->rid,op->expires,&msg);
1519         if (msg==NULL){
1520                 eXosip_unlock();
1521                 ms_warning("Fail to create a contact updated register.");
1522                 return FALSE;
1523         }
1524         osip_message_get_contact(msg,0,&ctt);
1525         if (ctt->url->host!=NULL){
1526                 osip_free(ctt->url->host);
1527         }
1528         ctt->url->host=osip_strdup(received);
1529         if (ctt->url->port!=NULL){
1530                 osip_free(ctt->url->port);
1531         }
1532         snprintf(port,sizeof(port),"%i",rport);
1533         ctt->url->port=osip_strdup(port);
1534         if (op->masquerade_via) masquerade_via(msg,received,port);
1535         eXosip_register_send_register(op->rid,msg);
1536         eXosip_unlock();
1537         osip_contact_to_str(ctt,&tmp);
1538         addr=sal_address_new(tmp);
1539         osip_free(tmp);
1540         sal_address_clean(addr);
1541         tmp=sal_address_as_string(addr);
1542         sal_op_set_contact(op,tmp);
1543         sal_address_destroy(addr);
1544         ms_message("Resending new register with updated contact %s",tmp);
1545         ms_free(tmp);
1546         return TRUE;
1547 }
1548
1549 static void registration_success(Sal *sal, eXosip_event_t *ev){
1550         SalOp *op=sal_find_register(sal,ev->rid);
1551         osip_header_t *h=NULL;
1552         bool_t registered;
1553         if (op==NULL){
1554                 ms_error("Receiving register response for unknown operation");
1555                 return;
1556         }
1557         osip_message_get_expires(ev->request,0,&h);
1558         if (h!=NULL && atoi(h->hvalue)!=0){
1559                 registered=TRUE;
1560                 if (!register_again_with_updated_contact(op,ev->request,ev->response)){
1561                         sal->callbacks.register_success(op,registered);
1562                 }
1563         }else {
1564                 sal->callbacks.register_success(op,FALSE);
1565         }
1566 }
1567
1568 static bool_t registration_failure(Sal *sal, eXosip_event_t *ev){
1569         int status_code=0;
1570         const char *reason=NULL;
1571         SalOp *op=sal_find_register(sal,ev->rid);
1572         SalReason sr=SalReasonUnknown;
1573         SalError se=SalErrorUnknown;
1574
1575         if (op==NULL){
1576                 ms_error("Receiving register failure for unknown operation");
1577                 return TRUE;
1578         }
1579         if (ev->response){
1580                 status_code=osip_message_get_status_code(ev->response);
1581                 reason=osip_message_get_reason_phrase(ev->response);
1582         }
1583         switch(status_code){
1584                 case 401:
1585                 case 407:
1586                         return process_authentication(sal,ev);
1587                         break;
1588                 case 606: /*Not acceptable, workaround for proxies that don't like private addresses
1589                                  in vias, such as ekiga.net
1590                                  On the opposite, freephonie.net bugs when via are masqueraded.
1591                                  */
1592                         op->masquerade_via=TRUE;
1593                 default:
1594                         /* if contact is up to date, process the failure, otherwise resend a new register with
1595                                 updated contact first, just in case the faillure is due to incorrect contact */
1596                         if (ev->response && register_again_with_updated_contact(op,ev->request,ev->response))
1597                                 return TRUE; /*we are retrying with an updated contact*/
1598                         if (status_code==403){
1599                                 se=SalErrorFailure;
1600                                 sr=SalReasonForbidden;
1601                         }else if (status_code==0){
1602                                 se=SalErrorNoResponse;
1603                         }
1604                         sal->callbacks.register_failure(op,se,sr,reason);
1605         }
1606         return TRUE;
1607 }
1608
1609 static void other_request_reply(Sal *sal,eXosip_event_t *ev){
1610         SalOp *op=find_op(sal,ev);
1611
1612         if (op==NULL){
1613                 ms_warning("other_request_reply(): Receiving response to unknown request.");
1614                 return;
1615         }
1616         if (ev->response){
1617                 update_contact_from_response(op,ev->response);
1618                 if (ev->request && strcmp(osip_message_get_method(ev->request),"OPTIONS")==0)
1619                         sal->callbacks.ping_reply(op);
1620         }
1621 }
1622
1623 static bool_t process_event(Sal *sal, eXosip_event_t *ev){
1624         ms_message("linphone process event get a message %d\n",ev->type);
1625         switch(ev->type){
1626                 case EXOSIP_CALL_ANSWERED:
1627                         ms_message("CALL_ANSWERED\n");
1628                         call_accepted(sal,ev);
1629                         authentication_ok(sal,ev);
1630                         break;
1631                 case EXOSIP_CALL_CLOSED:
1632                 case EXOSIP_CALL_CANCELLED:
1633                         ms_message("CALL_CLOSED or CANCELLED\n");
1634                         call_terminated(sal,ev);
1635                         break;
1636                 case EXOSIP_CALL_TIMEOUT:
1637                 case EXOSIP_CALL_NOANSWER:
1638                         ms_message("CALL_TIMEOUT or NOANSWER\n");
1639                         return call_failure(sal,ev);
1640                         break;
1641                 case EXOSIP_CALL_REQUESTFAILURE:
1642                 case EXOSIP_CALL_GLOBALFAILURE:
1643                 case EXOSIP_CALL_SERVERFAILURE:
1644                         ms_message("CALL_REQUESTFAILURE or GLOBALFAILURE or SERVERFAILURE\n");
1645                         return call_failure(sal,ev);
1646                         break;
1647                 case EXOSIP_CALL_RELEASED:
1648                         ms_message("CALL_RELEASED\n");
1649                         call_released(sal, ev);
1650                         break;
1651                 case EXOSIP_CALL_INVITE:
1652                         ms_message("CALL_NEW\n");
1653                         inc_new_call(sal,ev);
1654                         break;
1655                 case EXOSIP_CALL_REINVITE:
1656                         handle_reinvite(sal,ev);
1657                         break;
1658                 case EXOSIP_CALL_ACK:
1659                         ms_message("CALL_ACK");
1660                         handle_ack(sal,ev);
1661                         break;
1662                 case EXOSIP_CALL_REDIRECTED:
1663                         ms_message("CALL_REDIRECTED");
1664                         eXosip_default_action(ev);
1665                         break;
1666                 case EXOSIP_CALL_PROCEEDING:
1667                         ms_message("CALL_PROCEEDING");
1668                         call_proceeding(sal,ev);
1669                         break;
1670                 case EXOSIP_CALL_RINGING:
1671                         ms_message("CALL_RINGING");
1672                         call_ringing(sal,ev);
1673                         break;
1674                 case EXOSIP_CALL_MESSAGE_NEW:
1675                         ms_message("EXOSIP_CALL_MESSAGE_NEW");
1676                         call_message_new(sal,ev);
1677                         break;
1678                 case EXOSIP_CALL_MESSAGE_REQUESTFAILURE:
1679                         if (ev->did<0 && ev->response &&
1680                                 (ev->response->status_code==407 || ev->response->status_code==401)){
1681                                  return process_authentication(sal,ev);
1682                         }
1683                         break;
1684                 case EXOSIP_IN_SUBSCRIPTION_NEW:
1685                         ms_message("CALL_IN_SUBSCRIPTION_NEW ");
1686                         sal_exosip_subscription_recv(sal,ev);
1687                         break;
1688                 case EXOSIP_IN_SUBSCRIPTION_RELEASED:
1689                         ms_message("CALL_SUBSCRIPTION_NEW ");
1690                         sal_exosip_in_subscription_closed(sal,ev);
1691                         break;
1692                 case EXOSIP_SUBSCRIPTION_UPDATE:
1693                         ms_message("CALL_SUBSCRIPTION_UPDATE");
1694                         break;
1695                 case EXOSIP_SUBSCRIPTION_NOTIFY:
1696                         ms_message("CALL_SUBSCRIPTION_NOTIFY");
1697                         sal_exosip_notify_recv(sal,ev);
1698                         break;
1699                 case EXOSIP_SUBSCRIPTION_ANSWERED:
1700                         ms_message("EXOSIP_SUBSCRIPTION_ANSWERED, ev->sid=%i, ev->did=%i\n",ev->sid,ev->did);
1701                         sal_exosip_subscription_answered(sal,ev);
1702                         break;
1703                 case EXOSIP_SUBSCRIPTION_CLOSED:
1704                         ms_message("EXOSIP_SUBSCRIPTION_CLOSED\n");
1705                         sal_exosip_subscription_closed(sal,ev);
1706                         break;
1707                 case EXOSIP_SUBSCRIPTION_REQUESTFAILURE:   /**< announce a request failure      */
1708                         if (ev->response && (ev->response->status_code == 407 || ev->response->status_code == 401)){
1709                                 return process_authentication(sal,ev);
1710                         }
1711         case EXOSIP_SUBSCRIPTION_SERVERFAILURE:
1712                 case EXOSIP_SUBSCRIPTION_GLOBALFAILURE:
1713                         sal_exosip_subscription_closed(sal,ev);
1714                         break;
1715                 case EXOSIP_REGISTRATION_FAILURE:
1716                         ms_message("REGISTRATION_FAILURE\n");
1717                         return registration_failure(sal,ev);
1718                         break;
1719                 case EXOSIP_REGISTRATION_SUCCESS:
1720                         authentication_ok(sal,ev);
1721                         registration_success(sal,ev);
1722                         break;
1723                 case EXOSIP_MESSAGE_NEW:
1724                         other_request(sal,ev);
1725                         break;
1726                 case EXOSIP_MESSAGE_PROCEEDING:
1727                 case EXOSIP_MESSAGE_ANSWERED:
1728                 case EXOSIP_MESSAGE_REDIRECTED:
1729                 case EXOSIP_MESSAGE_SERVERFAILURE:
1730                 case EXOSIP_MESSAGE_GLOBALFAILURE:
1731                         other_request_reply(sal,ev);
1732                         break;
1733                 case EXOSIP_MESSAGE_REQUESTFAILURE:
1734                         if (ev->response && (ev->response->status_code == 407 || ev->response->status_code == 401)){
1735                                 return process_authentication(sal,ev);
1736                         }
1737                         other_request_reply(sal,ev);
1738                         break;
1739                 default:
1740                         ms_message("Unhandled exosip event ! %i",ev->type);
1741                         break;
1742         }
1743         return TRUE;
1744 }
1745
1746 int sal_iterate(Sal *sal){
1747         eXosip_event_t *ev;
1748         while((ev=eXosip_event_wait(0,0))!=NULL){
1749                 if (process_event(sal,ev))
1750                         eXosip_event_free(ev);
1751         }
1752         eXosip_lock();
1753         eXosip_automatic_refresh();
1754         eXosip_unlock();
1755         return 0;
1756 }
1757
1758 int sal_register(SalOp *h, const char *proxy, const char *from, int expires){
1759         osip_message_t *msg;
1760         sal_op_set_route(h,proxy);
1761         if (h->rid==-1){
1762                 eXosip_lock();
1763                 h->rid=eXosip_register_build_initial_register(from,proxy,sal_op_get_contact(h),expires,&msg);
1764                 sal_add_register(h->base.root,h);
1765         }else{
1766                 eXosip_lock();
1767                 eXosip_register_build_register(h->rid,expires,&msg);
1768         }
1769         eXosip_register_send_register(h->rid,msg);
1770         eXosip_unlock();
1771         h->expires=expires;
1772         return 0;
1773 }
1774
1775 int sal_unregister(SalOp *h){
1776         osip_message_t *msg=NULL;
1777         eXosip_lock();
1778         eXosip_register_build_register(h->rid,0,&msg);
1779         if (msg) eXosip_register_send_register(h->rid,msg);
1780         else ms_warning("Could not build unREGISTER !");
1781         eXosip_unlock();
1782         return 0;
1783 }
1784
1785 SalAddress * sal_address_new(const char *uri){
1786         osip_from_t *from;
1787         osip_from_init(&from);
1788         if (osip_from_parse(from,uri)!=0){
1789                 osip_from_free(from);
1790                 return NULL;
1791         }
1792         if (from->displayname!=NULL && from->displayname[0]=='"'){
1793                 char *unquoted=osip_strdup_without_quote(from->displayname);
1794                 osip_free(from->displayname);
1795                 from->displayname=unquoted;
1796         }
1797         return (SalAddress*)from;
1798 }
1799
1800 SalAddress * sal_address_clone(const SalAddress *addr){
1801         osip_from_t *ret=NULL;
1802         osip_from_clone((osip_from_t*)addr,&ret);
1803         return (SalAddress*)ret;
1804 }
1805
1806 #define null_if_empty(s) (((s)!=NULL && (s)[0]!='\0') ? (s) : NULL )
1807
1808 const char *sal_address_get_scheme(const SalAddress *addr){
1809         const osip_from_t *u=(const osip_from_t*)addr;
1810         return null_if_empty(u->url->scheme);
1811 }
1812
1813 const char *sal_address_get_display_name(const SalAddress* addr){
1814         const osip_from_t *u=(const osip_from_t*)addr;
1815         return null_if_empty(u->displayname);
1816 }
1817
1818 const char *sal_address_get_username(const SalAddress *addr){
1819         const osip_from_t *u=(const osip_from_t*)addr;
1820         return null_if_empty(u->url->username);
1821 }
1822
1823 const char *sal_address_get_domain(const SalAddress *addr){
1824         const osip_from_t *u=(const osip_from_t*)addr;
1825         return null_if_empty(u->url->host);
1826 }
1827
1828 void sal_address_set_display_name(SalAddress *addr, const char *display_name){
1829         osip_from_t *u=(osip_from_t*)addr;
1830         if (u->displayname!=NULL){
1831                 osip_free(u->displayname);
1832                 u->displayname=NULL;
1833         }
1834         if (display_name!=NULL && display_name[0]!='\0'){
1835                 u->displayname=osip_strdup(display_name);
1836         }
1837 }
1838
1839 void sal_address_set_username(SalAddress *addr, const char *username){
1840         osip_from_t *uri=(osip_from_t*)addr;
1841         if (uri->url->username!=NULL){
1842                 osip_free(uri->url->username);
1843                 uri->url->username=NULL;
1844         }
1845         if (username)
1846                 uri->url->username=osip_strdup(username);
1847 }
1848
1849 void sal_address_set_domain(SalAddress *addr, const char *host){
1850         osip_from_t *uri=(osip_from_t*)addr;
1851         if (uri->url->host!=NULL){
1852                 osip_free(uri->url->host);
1853                 uri->url->host=NULL;
1854         }
1855         if (host)
1856                 uri->url->host=osip_strdup(host);
1857 }
1858
1859 void sal_address_set_port(SalAddress *addr, const char *port){
1860         osip_from_t *uri=(osip_from_t*)addr;
1861         if (uri->url->port!=NULL){
1862                 osip_free(uri->url->port);
1863                 uri->url->port=NULL;
1864         }
1865         if (port)
1866                 uri->url->port=osip_strdup(port);
1867 }
1868
1869 void sal_address_set_port_int(SalAddress *uri, int port){
1870         char tmp[12];
1871         if (port==5060){
1872                 /*this is the default, special case to leave the port field blank*/
1873                 sal_address_set_port(uri,NULL);
1874                 return;
1875         }
1876         snprintf(tmp,sizeof(tmp),"%i",port);
1877         sal_address_set_port(uri,tmp);
1878 }
1879
1880 void sal_address_clean(SalAddress *addr){
1881         osip_generic_param_freelist(& ((osip_from_t*)addr)->gen_params);
1882         osip_uri_param_freelist(& ((osip_from_t*)addr)->url->url_params);
1883 }
1884
1885 char *sal_address_as_string(const SalAddress *u){
1886         char *tmp,*ret;
1887         osip_from_t *from=(osip_from_t *)u;
1888         char *old_displayname=NULL;
1889         /* hack to force use of quotes around the displayname*/
1890         if (from->displayname!=NULL
1891             && from->displayname[0]!='"'){
1892                 old_displayname=from->displayname;
1893                 from->displayname=osip_enquote(from->displayname);
1894         }
1895         osip_from_to_str(from,&tmp);
1896         if (old_displayname!=NULL){
1897                 ms_free(from->displayname);
1898                 from->displayname=old_displayname;
1899         }
1900         ret=ms_strdup(tmp);
1901         osip_free(tmp);
1902         return ret;
1903 }
1904
1905 char *sal_address_as_string_uri_only(const SalAddress *u){
1906         char *tmp=NULL,*ret;
1907         osip_uri_to_str(((osip_from_t*)u)->url,&tmp);
1908         ret=ms_strdup(tmp);
1909         osip_free(tmp);
1910         return ret;
1911 }
1912 void sal_address_add_param(SalAddress *u,const char* name,const char* value) {
1913         osip_uri_uparam_add     (((osip_from_t*)u)->url,ms_strdup(name),ms_strdup(value));
1914 }
1915
1916 void sal_address_destroy(SalAddress *u){
1917         osip_from_free((osip_from_t*)u);
1918 }
1919
1920 void sal_set_keepalive_period(Sal *ctx,unsigned int value) {
1921         ctx->keepalive_period=value;
1922         eXosip_set_option (EXOSIP_OPT_UDP_KEEP_ALIVE, &value);
1923 }
1924
1925 const char * sal_address_get_port(const SalAddress *addr) {
1926         const osip_from_t *u=(const osip_from_t*)addr;
1927         return null_if_empty(u->url->port);
1928 }
1929
1930 int sal_address_get_port_int(const SalAddress *uri) {
1931         const char* port = sal_address_get_port(uri);
1932         if (port != NULL) {
1933                 return atoi(port);
1934         } else {
1935                 return 5060;
1936         }
1937 }
1938
1939 /*
1940  * Send a re-Invite used to hold the current call
1941 */
1942 int sal_call_hold(SalOp *h, bool_t holdon)
1943 {
1944         int err=0;
1945
1946         osip_message_t *reinvite=NULL;
1947         if(eXosip_call_build_request(h->did,"INVITE",&reinvite) != OSIP_SUCCESS || reinvite==NULL)
1948                 return -1;
1949         osip_message_set_subject(reinvite,osip_strdup("Phone Call Hold"));
1950         osip_message_set_allow(reinvite, "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO");
1951         if (h->base.root->session_expires!=0){
1952                 osip_message_set_header(reinvite, "Session-expires", "200");
1953                 osip_message_set_supported(reinvite, "timer");
1954         }
1955         //add something to say that the distant sip phone will be in sendonly/sendrecv mode
1956         if (h->base.local_media){
1957                 h->sdp_offering=TRUE;
1958                 sal_media_description_set_dir(h->base.local_media, holdon ? SalStreamSendOnly : SalStreamSendRecv);
1959                 set_sdp_from_desc(reinvite,h->base.local_media);
1960         }else h->sdp_offering=FALSE;
1961         eXosip_lock();
1962         err = eXosip_call_send_request(h->did, reinvite);
1963         eXosip_unlock();
1964
1965         return err;
1966 }
1967
1968 /* sends a reinvite. Local media description may have changed by application since call establishment*/
1969 int sal_call_update(SalOp *h){
1970         int err=0;
1971         osip_message_t *reinvite=NULL;
1972
1973         eXosip_lock();
1974         if(eXosip_call_build_request(h->did,"INVITE",&reinvite) != OSIP_SUCCESS || reinvite==NULL){
1975                 eXosip_unlock();
1976                 return -1;
1977         }
1978         eXosip_unlock();
1979         osip_message_set_subject(reinvite,osip_strdup("Phone call parameters updated"));
1980         osip_message_set_allow(reinvite, "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO");
1981         if (h->base.root->session_expires!=0){
1982                 osip_message_set_header(reinvite, "Session-expires", "200");
1983                 osip_message_set_supported(reinvite, "timer");
1984         }
1985         if (h->base.local_media){
1986                 h->sdp_offering=TRUE;
1987                 set_sdp_from_desc(reinvite,h->base.local_media);
1988         }else h->sdp_offering=FALSE;
1989         eXosip_lock();
1990         err = eXosip_call_send_request(h->did, reinvite);
1991         eXosip_unlock();
1992         return err;
1993 }