sjero.net Git - linphone/blob - coreapi/TunnelManager.cc

   1 /*
   2  *  C Implementation: tunnel
   3  *
   4  * Description:
   5  *
   6  *
   7  * Author: Simon Morlat <simon.morlat@linphone.org>, (C) 2009
   8  *
   9  * Copyright (C) 2010  Belledonne Comunications, Grenoble, France
  10  *
  11  */
  12
  13
  14 #include "TunnelManager.hh"
  15
  16 #include "ortp/rtpsession.h"
  17 #include "linphonecore.h"
  18 #include "linphonecore_utils.h"
  19 #include "eXosip2/eXosip_transport_hook.h"
  20 #include "tunnel/udp_mirror.hh"
  21
  22 #ifdef ANDROID
  23 #include <android/log.h>
  24 #endif
  25
  26
  27 using namespace belledonnecomm;
  28 using namespace ::std;
  29
  30 Mutex TunnelManager::sMutex;
  31
  32 int TunnelManager::eXosipSendto(int fd,const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen,void* userdata){
  33         TunnelManager* lTunnelMgr=(TunnelManager*)userdata;
  34
  35         sMutex.lock();
  36         if (lTunnelMgr->mSipSocket==NULL){
  37                 sMutex.unlock();
  38                 return len;
  39         }
  40         lTunnelMgr->mSipSocket->sendto(buf,len,to,tolen);
  41         sMutex.unlock();
  42         //ignore the error in all cases, retransmissions might be successful.
  43         return len;
  44 }
  45
  46 int TunnelManager::eXosipRecvfrom(int fd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen,void* userdata){
  47         TunnelManager* lTunnelMgr=(TunnelManager*)userdata;
  48         int err;
  49         sMutex.lock();
  50         if (lTunnelMgr->mSipSocket==NULL){
  51                 sMutex.unlock();
  52                 return 0;//let ignore the error
  53         }
  54         err=lTunnelMgr->mSipSocket->recvfrom(buf,len,from,*fromlen);
  55         sMutex.unlock();
  56         return err;
  57 }
  58
  59 int TunnelManager::eXosipSelect(int max_fds, fd_set *s1, fd_set *s2, fd_set *s3, struct timeval *tv,void* userdata){
  60         struct timeval begin,cur;
  61         TunnelManager* lTunnelMgr=(TunnelManager*)userdata;
  62         if (s1 && tv!=0 && tv->tv_sec){
  63                 /*this is the select from udp.c, the one that is interesting to us*/
  64                 NativeSocket udp_fd=(NativeSocket)eXosip_get_udp_socket();
  65                 NativeSocket controlfd=(NativeSocket)eXosip_get_control_fd();
  66
  67                 FD_ZERO(s1);
  68                 gettimeofday(&begin,NULL);
  69                 do{
  70                         struct timeval abit;
  71
  72                         abit.tv_sec=0;
  73                         abit.tv_usec=20000;
  74                         sMutex.lock();
  75                         if (lTunnelMgr->mSipSocket!=NULL){
  76                                 if (lTunnelMgr->mSipSocket->hasData()) {
  77                                         sMutex.unlock();
  78                                         /* we make exosip believe that it has udp data to read*/
  79                                         FD_SET(udp_fd,s1);
  80                                         return 1;
  81                                 }
  82                         }
  83                         sMutex.unlock();
  84                         gettimeofday(&cur,NULL);
  85                         if (cur.tv_sec-begin.tv_sec>tv->tv_sec) {
  86                                 FD_SET(controlfd,s1);
  87                                 FD_SET(udp_fd,s1);
  88                                 return 0;
  89                         }
  90                         FD_ZERO(s1);
  91                         FD_SET(controlfd,s1);
  92                         if (select(max_fds,s1,s2,s3,&abit)==1) {
  93                                 return 1;
  94                         }
  95                 }while(1);
  96
  97         }else{
  98                 /*select called from other places, only the control fd is present */
  99                 return select(max_fds,s1,s2,s3,tv);
 100         }
 101 }
 102
 103
 104 void TunnelManager::addServer(const char *ip, int port,unsigned int udpMirrorPort,unsigned int delay) {
 105         addServer(ip,port);
 106         mUdpMirrorClients.push_back(UdpMirrorClient(ServerAddr(ip,udpMirrorPort),delay));
 107 }
 108
 109 void TunnelManager::addServer(const char *ip, int port) {
 110         mServerAddrs.push_back(ServerAddr(ip,port));
 111         if (mTunnelClient) mTunnelClient->addServer(ip,port);
 112 }
 113
 114 void TunnelManager::cleanServers() {
 115         mServerAddrs.clear();
 116
 117         UdpMirrorClientList::iterator it;
 118         mAutoDetectStarted=false;
 119         for (it = mUdpMirrorClients.begin(); it != mUdpMirrorClients.end();) {
 120                 UdpMirrorClient& s=*it++;
 121                 s.stop();
 122         }
 123         mUdpMirrorClients.clear();
 124         if (mTunnelClient) mTunnelClient->cleanServers();
 125 }
 126
 127 void TunnelManager::reconnect(){
 128         if (mTunnelClient)
 129                 mTunnelClient->reconnect();
 130 }
 131
 132 void TunnelManager::setCallback(StateCallback cb, void *userdata) {
 133         mCallback=cb;
 134         mCallbackData=userdata;
 135 }
 136
 137 static void sCloseRtpTransport(RtpTransport *t, void *userData){
 138         TunnelSocket *s=(TunnelSocket*)userData;
 139         TunnelManager *manager=(TunnelManager*)s->getUserPointer();
 140         manager->closeRtpTransport(t, s);
 141 }
 142 void TunnelManager::closeRtpTransport(RtpTransport *t, TunnelSocket *s){
 143         mTunnelClient->closeSocket(s);
 144         ms_free(t);
 145 }
 146
 147 static RtpTransport *sCreateRtpTransport(void* userData, int port){
 148         return ((TunnelManager *) userData)->createRtpTransport(port);
 149 }
 150
 151 RtpTransport *TunnelManager::createRtpTransport(int port){
 152         TunnelSocket *socket=mTunnelClient->createSocket(port);
 153         socket->setUserPointer(this);
 154         RtpTransport *t=ms_new0(RtpTransport,1);
 155         t->t_getsocket=NULL;
 156         t->t_recvfrom=customRecvfrom;
 157         t->t_sendto=customSendto;
 158         t->t_close=sCloseRtpTransport;
 159         t->data=socket;
 160         return t;
 161 }
 162
 163 void TunnelManager::start() {
 164         if (!mTunnelClient) {
 165                 mTunnelClient = new TunnelClient();
 166                 mTunnelClient->setCallback((StateCallback)tunnelCallback,this);
 167                 list<ServerAddr>::iterator it;
 168                 for(it=mServerAddrs.begin();it!=mServerAddrs.end();++it){
 169                         const ServerAddr &addr=*it;
 170                         mTunnelClient->addServer(addr.mAddr.c_str(), addr.mPort);
 171                 }
 172                 mTunnelClient->setHttpProxy(mHttpProxyHost.c_str(), mHttpProxyPort, mHttpUserName.c_str(), mHttpPasswd.c_str());
 173         }
 174         mTunnelClient->start();
 175
 176         if (mSipSocket == NULL) mSipSocket =mTunnelClient->createSocket(5060);
 177 }
 178
 179 bool TunnelManager::isStarted() {
 180         return mTunnelClient != 0 && mTunnelClient->isStarted();
 181 }
 182
 183 bool TunnelManager::isReady() const {
 184         return mTunnelClient && mTunnelClient->isReady();
 185 }
 186
 187 int TunnelManager::customSendto(struct _RtpTransport *t, mblk_t *msg , int flags, const struct sockaddr *to, socklen_t tolen){
 188         int size;
 189         msgpullup(msg,-1);
 190         size=msgdsize(msg);
 191         ((TunnelSocket*)t->data)->sendto(msg->b_rptr,size,to,tolen);
 192         return size;
 193 }
 194
 195 int TunnelManager::customRecvfrom(struct _RtpTransport *t, mblk_t *msg, int flags, struct sockaddr *from, socklen_t *fromlen){
 196         int err=((TunnelSocket*)t->data)->recvfrom(msg->b_wptr,msg->b_datap->db_lim-msg->b_datap->db_base,from,*fromlen);
 197         if (err>0) return err;
 198         return 0;
 199 }
 200
 201
 202 TunnelManager::TunnelManager(LinphoneCore* lc) :TunnelClientController()
 203 ,mCore(lc)
 204 ,mSipSocket(NULL)
 205 ,mCallback(NULL)
 206 ,mEnabled(false)
 207 ,mTunnelClient(NULL)
 208 ,mAutoDetectStarted(false)
 209 ,mHttpProxyPort(0){
 210
 211         mExosipTransport.data=this;
 212         mExosipTransport.recvfrom=eXosipRecvfrom;
 213         mExosipTransport.sendto=eXosipSendto;
 214         mExosipTransport.select=eXosipSelect;
 215         linphone_core_add_iterate_hook(mCore,(LinphoneCoreIterateHook)sOnIterate,this);
 216         mTransportFactories.audio_rtcp_func=sCreateRtpTransport;
 217         mTransportFactories.audio_rtcp_func_data=this;
 218         mTransportFactories.audio_rtp_func=sCreateRtpTransport;
 219         mTransportFactories.audio_rtp_func_data=this;
 220         mTransportFactories.video_rtcp_func=sCreateRtpTransport;
 221         mTransportFactories.video_rtcp_func_data=this;
 222         mTransportFactories.video_rtp_func=sCreateRtpTransport;
 223         mTransportFactories.video_rtp_func_data=this;
 224 }
 225
 226 TunnelManager::~TunnelManager(){
 227         stopClient();
 228 }
 229
 230 void TunnelManager::stopClient(){
 231         eXosip_transport_hook_register(NULL);
 232         if (mSipSocket != NULL){
 233                 sMutex.lock();
 234                 mTunnelClient->closeSocket(mSipSocket);
 235                 mSipSocket = NULL;
 236                 sMutex.unlock();
 237         }
 238         if (mTunnelClient){
 239                 delete mTunnelClient;
 240                 mTunnelClient=NULL;
 241         }
 242 }
 243
 244 void TunnelManager::processTunnelEvent(const Event &ev){
 245         LinphoneProxyConfig* lProxy;
 246         linphone_core_get_default_proxy(mCore, &lProxy);
 247
 248         if (mEnabled && mTunnelClient->isReady()){
 249                 ms_message("Tunnel is up, registering now");
 250                 linphone_core_set_firewall_policy(mCore,LinphonePolicyNoFirewall);
 251                 linphone_core_set_rtp_transport_factories(mCore,&mTransportFactories);
 252                 eXosip_transport_hook_register(&mExosipTransport);
 253                 //force transport to udp
 254                 LCSipTransports lTransport;
 255
 256                 lTransport.udp_port=15060;
 257                 lTransport.tcp_port=0;
 258                 lTransport.tls_port=0;
 259                 lTransport.dtls_port=0;
 260
 261                 linphone_core_set_sip_transports(mCore, &lTransport);
 262                 //register
 263                 if (lProxy) {
 264                         linphone_proxy_config_done(lProxy);
 265                 }
 266         }else if (mEnabled && !mTunnelClient->isReady()){
 267                 /* we got disconnected from the tunnel */
 268                 if (lProxy && linphone_proxy_config_is_registered(lProxy)) {
 269                         /*forces de-registration so that we register again when the tunnel is up*/
 270                         linphone_proxy_config_edit(lProxy);
 271                         linphone_core_iterate(mCore);
 272                 }
 273         }
 274 }
 275
 276 void TunnelManager::waitUnRegistration(){
 277         LinphoneProxyConfig* lProxy;
 278         linphone_core_get_default_proxy(mCore, &lProxy);
 279         if (lProxy && linphone_proxy_config_get_state(lProxy)==LinphoneRegistrationOk) {
 280                 int i=0;
 281                 linphone_proxy_config_edit(lProxy);
 282                 //make sure unregister is sent and authenticated
 283                 do{
 284                         linphone_core_iterate(mCore);
 285                         ms_usleep(20000);
 286                         if (i>100){
 287                                 ms_message("tunnel: timeout for unregistration expired, giving up");
 288                                 break;
 289                         }
 290                         i++;
 291                 }while(linphone_proxy_config_get_state(lProxy)!=LinphoneRegistrationCleared);
 292         }
 293 }
 294
 295 void TunnelManager::enable(bool isEnable) {
 296         ms_message("Turning tunnel [%s]",(isEnable?"on":"off"));
 297         if (isEnable && !mEnabled){
 298                 mEnabled=true;
 299                 //1 save transport and firewall policy
 300                 linphone_core_get_sip_transports(mCore, &mRegularTransport);
 301                 mPreviousFirewallPolicy=linphone_core_get_firewall_policy(mCore);
 302                 //2 unregister
 303                 waitUnRegistration();
 304                 //3 insert tunnel
 305                 start();
 306         }else if (!isEnable && mEnabled){
 307                 //1 unregister
 308                 waitUnRegistration();
 309
 310                 mEnabled=false;
 311                 stopClient();
 312
 313                 linphone_core_set_rtp_transport_factories(mCore,NULL);
 314
 315                 eXosip_transport_hook_register(NULL);
 316                 //Restore transport and firewall policy
 317                 linphone_core_set_sip_transports(mCore, &mRegularTransport);
 318                 linphone_core_set_firewall_policy(mCore, mPreviousFirewallPolicy);
 319                 //register
 320                 LinphoneProxyConfig* lProxy;
 321                 linphone_core_get_default_proxy(mCore, &lProxy);
 322                 if (lProxy) {
 323                         linphone_proxy_config_done(lProxy);
 324                 }
 325
 326         }
 327 }
 328
 329 void TunnelManager::tunnelCallback(bool connected, TunnelManager *zis){
 330         Event ev;
 331         ev.mType=TunnelEvent;
 332         ev.mData.mConnected=connected;
 333         zis->postEvent(ev);
 334 }
 335
 336 void TunnelManager::onIterate(){
 337         mMutex.lock();
 338         while(!mEvq.empty()){
 339                 Event ev=mEvq.front();
 340                 mEvq.pop();
 341                 mMutex.unlock();
 342                 if (ev.mType==TunnelEvent)
 343                         processTunnelEvent(ev);
 344                 else if (ev.mType==UdpMirrorClientEvent){
 345                         processUdpMirrorEvent(ev);
 346                 }
 347                 mMutex.lock();
 348         }
 349         mMutex.unlock();
 350 }
 351
 352 /*invoked from linphone_core_iterate() */
 353 void TunnelManager::sOnIterate(TunnelManager *zis){
 354         zis->onIterate();
 355 }
 356
 357 #ifdef ANDROID
 358 extern void linphone_android_log_handler(int prio, const char *fmt, va_list args);
 359 static void linphone_android_tunnel_log_handler(int lev, const char *fmt, va_list args) {
 360         int prio;
 361         switch(lev){
 362         case TUNNEL_DEBUG:      prio = ANDROID_LOG_DEBUG;       break;
 363         case TUNNEL_INFO:       prio = ANDROID_LOG_INFO;        break;
 364         case TUNNEL_NOTICE:     prio = ANDROID_LOG_INFO;        break;
 365         case TUNNEL_WARN:       prio = ANDROID_LOG_WARN;        break;
 366         case TUNNEL_ERROR:      prio = ANDROID_LOG_ERROR;       break;
 367         default:                prio = ANDROID_LOG_DEFAULT;     break;
 368         }
 369         linphone_android_log_handler(prio, fmt, args);
 370 }
 371 #endif /*ANDROID*/
 372
 373 void TunnelManager::enableLogs(bool value) {
 374         enableLogs(value,NULL);
 375 }
 376
 377 void TunnelManager::enableLogs(bool isEnabled,LogHandler logHandler) {
 378         if (logHandler != NULL) SetLogHandler(logHandler);
 379 #ifdef ANDROID
 380         else SetLogHandler(linphone_android_tunnel_log_handler);
 381 #else
 382         else SetLogHandler(default_log_handler);
 383 #endif
 384
 385         if (isEnabled) {
 386                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN|TUNNEL_INFO);
 387         } else {
 388                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN);
 389         }
 390 }
 391
 392
 393 bool TunnelManager::isEnabled() {
 394         return mEnabled;
 395 }
 396
 397 void TunnelManager::processUdpMirrorEvent(const Event &ev){
 398         if (ev.mData.mHaveUdp) {
 399                 LOGI("Tunnel is not required, disabling");
 400                 enable(false);
 401                 mAutoDetectStarted = false;
 402         } else {
 403                 mCurrentUdpMirrorClient++;
 404                 if (mCurrentUdpMirrorClient !=mUdpMirrorClients.end()) {
 405                         // enable tunnel but also try backup server
 406                         LOGI("Tunnel is required, enabling; Trying backup udp mirror");
 407
 408                         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 409                         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 410                 } else {
 411                         LOGI("Tunnel is required, enabling; no backup udp mirror available");
 412                         mAutoDetectStarted = false;
 413                 }
 414                 enable(true);
 415         }
 416 }
 417
 418 void TunnelManager::postEvent(const Event &ev){
 419         mMutex.lock();
 420         mEvq.push(ev);
 421         mMutex.unlock();
 422 }
 423
 424 void TunnelManager::sUdpMirrorClientCallback(bool isUdpAvailable, void* data) {
 425         TunnelManager* thiz = (TunnelManager*)data;
 426         Event ev;
 427         ev.mType=UdpMirrorClientEvent;
 428         ev.mData.mHaveUdp=isUdpAvailable;
 429         thiz->postEvent(ev);
 430 }
 431
 432 void TunnelManager::autoDetect() {
 433         // first check if udp mirrors was provisionned
 434         if (mUdpMirrorClients.empty()) {
 435                 LOGE("No UDP mirror server configured aborting auto detection");
 436                 return;
 437         }
 438         if (mAutoDetectStarted) {
 439                 LOGE("auto detection already in progress, restarting");
 440                 (*mCurrentUdpMirrorClient).stop();
 441         }
 442         mAutoDetectStarted=true;
 443         mCurrentUdpMirrorClient =mUdpMirrorClients.begin();
 444         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 445         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 446
 447 }
 448
 449 void TunnelManager::setHttpProxyAuthInfo(const char* username,const char* passwd) {
 450         mHttpUserName=username?username:"";
 451         mHttpPasswd=passwd?passwd:"";
 452         if (mTunnelClient) mTunnelClient->setHttpProxyAuthInfo(username,passwd);
 453 }
 454
 455 void TunnelManager::setHttpProxy(const char *host,int port, const char *username, const char *passwd){
 456         mHttpUserName=username?username:"";
 457         mHttpPasswd=passwd?passwd:"";
 458         mHttpProxyPort=(port>0) ? port : 0;
 459         mHttpProxyHost=host ? host : "";
 460         if (mTunnelClient) mTunnelClient->setHttpProxy(host, port, username, passwd);
 461 }
 462
 463 LinphoneCore *TunnelManager::getLinphoneCore(){
 464         return mCore;
 465 }