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         if (ip == NULL) {
 111                 ip = "";
 112                 ms_warning("Adding tunnel server with empty ip, it will not work!");
 113         }
 114         mServerAddrs.push_back(ServerAddr(ip,port));
 115         if (mTunnelClient) mTunnelClient->addServer(ip,port);
 116 }
 117
 118 void TunnelManager::cleanServers() {
 119         mServerAddrs.clear();
 120
 121         UdpMirrorClientList::iterator it;
 122         mAutoDetectStarted=false;
 123         for (it = mUdpMirrorClients.begin(); it != mUdpMirrorClients.end();) {
 124                 UdpMirrorClient& s=*it++;
 125                 s.stop();
 126         }
 127         mUdpMirrorClients.clear();
 128         if (mTunnelClient) mTunnelClient->cleanServers();
 129 }
 130
 131 void TunnelManager::reconnect(){
 132         if (mTunnelClient)
 133                 mTunnelClient->reconnect();
 134 }
 135
 136 void TunnelManager::setCallback(StateCallback cb, void *userdata) {
 137         mCallback=cb;
 138         mCallbackData=userdata;
 139 }
 140
 141 static void sCloseRtpTransport(RtpTransport *t, void *userData){
 142         TunnelSocket *s=(TunnelSocket*)userData;
 143         TunnelManager *manager=(TunnelManager*)s->getUserPointer();
 144         manager->closeRtpTransport(t, s);
 145 }
 146 void TunnelManager::closeRtpTransport(RtpTransport *t, TunnelSocket *s){
 147         mTunnelClient->closeSocket(s);
 148         ms_free(t);
 149 }
 150
 151 static RtpTransport *sCreateRtpTransport(void* userData, int port){
 152         return ((TunnelManager *) userData)->createRtpTransport(port);
 153 }
 154
 155 RtpTransport *TunnelManager::createRtpTransport(int port){
 156         TunnelSocket *socket=mTunnelClient->createSocket(port);
 157         socket->setUserPointer(this);
 158         RtpTransport *t=ms_new0(RtpTransport,1);
 159         t->t_getsocket=NULL;
 160         t->t_recvfrom=customRecvfrom;
 161         t->t_sendto=customSendto;
 162         t->t_close=sCloseRtpTransport;
 163         t->data=socket;
 164         return t;
 165 }
 166
 167 void TunnelManager::start() {
 168         if (!mTunnelClient) {
 169                 mTunnelClient = new TunnelClient();
 170                 mTunnelClient->setCallback((StateCallback)tunnelCallback,this);
 171                 list<ServerAddr>::iterator it;
 172                 for(it=mServerAddrs.begin();it!=mServerAddrs.end();++it){
 173                         const ServerAddr &addr=*it;
 174                         mTunnelClient->addServer(addr.mAddr.c_str(), addr.mPort);
 175                 }
 176                 mTunnelClient->setHttpProxy(mHttpProxyHost.c_str(), mHttpProxyPort, mHttpUserName.c_str(), mHttpPasswd.c_str());
 177         }
 178         mTunnelClient->start();
 179
 180         if (mSipSocket == NULL) mSipSocket =mTunnelClient->createSocket(5060);
 181 }
 182
 183 bool TunnelManager::isStarted() {
 184         return mTunnelClient != 0 && mTunnelClient->isStarted();
 185 }
 186
 187 bool TunnelManager::isReady() const {
 188         return mTunnelClient && mTunnelClient->isReady();
 189 }
 190
 191 int TunnelManager::customSendto(struct _RtpTransport *t, mblk_t *msg , int flags, const struct sockaddr *to, socklen_t tolen){
 192         int size;
 193         msgpullup(msg,-1);
 194         size=msgdsize(msg);
 195         ((TunnelSocket*)t->data)->sendto(msg->b_rptr,size,to,tolen);
 196         return size;
 197 }
 198
 199 int TunnelManager::customRecvfrom(struct _RtpTransport *t, mblk_t *msg, int flags, struct sockaddr *from, socklen_t *fromlen){
 200         int err=((TunnelSocket*)t->data)->recvfrom(msg->b_wptr,msg->b_datap->db_lim-msg->b_datap->db_base,from,*fromlen);
 201         if (err>0) return err;
 202         return 0;
 203 }
 204
 205
 206 TunnelManager::TunnelManager(LinphoneCore* lc) :TunnelClientController()
 207 ,mCore(lc)
 208 ,mSipSocket(NULL)
 209 ,mCallback(NULL)
 210 ,mEnabled(false)
 211 ,mTunnelClient(NULL)
 212 ,mAutoDetectStarted(false)
 213 ,mHttpProxyPort(0){
 214
 215         mExosipTransport.data=this;
 216         mExosipTransport.recvfrom=eXosipRecvfrom;
 217         mExosipTransport.sendto=eXosipSendto;
 218         mExosipTransport.select=eXosipSelect;
 219         linphone_core_add_iterate_hook(mCore,(LinphoneCoreIterateHook)sOnIterate,this);
 220         mTransportFactories.audio_rtcp_func=sCreateRtpTransport;
 221         mTransportFactories.audio_rtcp_func_data=this;
 222         mTransportFactories.audio_rtp_func=sCreateRtpTransport;
 223         mTransportFactories.audio_rtp_func_data=this;
 224         mTransportFactories.video_rtcp_func=sCreateRtpTransport;
 225         mTransportFactories.video_rtcp_func_data=this;
 226         mTransportFactories.video_rtp_func=sCreateRtpTransport;
 227         mTransportFactories.video_rtp_func_data=this;
 228 }
 229
 230 TunnelManager::~TunnelManager(){
 231         stopClient();
 232 }
 233
 234 void TunnelManager::stopClient(){
 235         eXosip_transport_hook_register(NULL);
 236         if (mSipSocket != NULL){
 237                 sMutex.lock();
 238                 mTunnelClient->closeSocket(mSipSocket);
 239                 mSipSocket = NULL;
 240                 sMutex.unlock();
 241         }
 242         if (mTunnelClient){
 243                 delete mTunnelClient;
 244                 mTunnelClient=NULL;
 245         }
 246 }
 247
 248 void TunnelManager::processTunnelEvent(const Event &ev){
 249         LinphoneProxyConfig* lProxy;
 250         linphone_core_get_default_proxy(mCore, &lProxy);
 251
 252         if (mEnabled && mTunnelClient->isReady()){
 253                 ms_message("Tunnel is up, registering now");
 254                 linphone_core_set_firewall_policy(mCore,LinphonePolicyNoFirewall);
 255                 linphone_core_set_rtp_transport_factories(mCore,&mTransportFactories);
 256                 eXosip_transport_hook_register(&mExosipTransport);
 257                 //force transport to udp
 258                 LCSipTransports lTransport;
 259
 260                 lTransport.udp_port=15060;
 261                 lTransport.tcp_port=0;
 262                 lTransport.tls_port=0;
 263                 lTransport.dtls_port=0;
 264
 265                 linphone_core_set_sip_transports(mCore, &lTransport);
 266                 //register
 267                 if (lProxy) {
 268                         linphone_proxy_config_done(lProxy);
 269                 }
 270         }else if (mEnabled && !mTunnelClient->isReady()){
 271                 /* we got disconnected from the tunnel */
 272                 if (lProxy && linphone_proxy_config_is_registered(lProxy)) {
 273                         /*forces de-registration so that we register again when the tunnel is up*/
 274                         linphone_proxy_config_edit(lProxy);
 275                         linphone_core_iterate(mCore);
 276                 }
 277         }
 278 }
 279
 280 void TunnelManager::waitUnRegistration(){
 281         LinphoneProxyConfig* lProxy;
 282         linphone_core_get_default_proxy(mCore, &lProxy);
 283         if (lProxy && linphone_proxy_config_get_state(lProxy)==LinphoneRegistrationOk) {
 284                 int i=0;
 285                 linphone_proxy_config_edit(lProxy);
 286                 //make sure unregister is sent and authenticated
 287                 do{
 288                         linphone_core_iterate(mCore);
 289                         ms_usleep(20000);
 290                         if (i>100){
 291                                 ms_message("tunnel: timeout for unregistration expired, giving up");
 292                                 break;
 293                         }
 294                         i++;
 295                 }while(linphone_proxy_config_get_state(lProxy)!=LinphoneRegistrationCleared);
 296         }
 297 }
 298
 299 void TunnelManager::enable(bool isEnable) {
 300         ms_message("Turning tunnel [%s]",(isEnable?"on":"off"));
 301         if (isEnable && !mEnabled){
 302                 mEnabled=true;
 303                 //1 save transport and firewall policy
 304                 linphone_core_get_sip_transports(mCore, &mRegularTransport);
 305                 mPreviousFirewallPolicy=linphone_core_get_firewall_policy(mCore);
 306                 //2 unregister
 307                 waitUnRegistration();
 308                 //3 insert tunnel
 309                 start();
 310         }else if (!isEnable && mEnabled){
 311                 //1 unregister
 312                 waitUnRegistration();
 313
 314                 mEnabled=false;
 315                 stopClient();
 316
 317                 linphone_core_set_rtp_transport_factories(mCore,NULL);
 318
 319                 eXosip_transport_hook_register(NULL);
 320                 //Restore transport and firewall policy
 321                 linphone_core_set_sip_transports(mCore, &mRegularTransport);
 322                 linphone_core_set_firewall_policy(mCore, mPreviousFirewallPolicy);
 323                 //register
 324                 LinphoneProxyConfig* lProxy;
 325                 linphone_core_get_default_proxy(mCore, &lProxy);
 326                 if (lProxy) {
 327                         linphone_proxy_config_done(lProxy);
 328                 }
 329
 330         }
 331 }
 332
 333 void TunnelManager::tunnelCallback(bool connected, TunnelManager *zis){
 334         Event ev;
 335         ev.mType=TunnelEvent;
 336         ev.mData.mConnected=connected;
 337         zis->postEvent(ev);
 338 }
 339
 340 void TunnelManager::onIterate(){
 341         mMutex.lock();
 342         while(!mEvq.empty()){
 343                 Event ev=mEvq.front();
 344                 mEvq.pop();
 345                 mMutex.unlock();
 346                 if (ev.mType==TunnelEvent)
 347                         processTunnelEvent(ev);
 348                 else if (ev.mType==UdpMirrorClientEvent){
 349                         processUdpMirrorEvent(ev);
 350                 }
 351                 mMutex.lock();
 352         }
 353         mMutex.unlock();
 354 }
 355
 356 /*invoked from linphone_core_iterate() */
 357 void TunnelManager::sOnIterate(TunnelManager *zis){
 358         zis->onIterate();
 359 }
 360
 361 #ifdef ANDROID
 362 extern void linphone_android_log_handler(int prio, const char *fmt, va_list args);
 363 static void linphone_android_tunnel_log_handler(int lev, const char *fmt, va_list args) {
 364         int prio;
 365         switch(lev){
 366         case TUNNEL_DEBUG:      prio = ANDROID_LOG_DEBUG;       break;
 367         case TUNNEL_INFO:       prio = ANDROID_LOG_INFO;        break;
 368         case TUNNEL_NOTICE:     prio = ANDROID_LOG_INFO;        break;
 369         case TUNNEL_WARN:       prio = ANDROID_LOG_WARN;        break;
 370         case TUNNEL_ERROR:      prio = ANDROID_LOG_ERROR;       break;
 371         default:                prio = ANDROID_LOG_DEFAULT;     break;
 372         }
 373         linphone_android_log_handler(prio, fmt, args);
 374 }
 375 #endif /*ANDROID*/
 376
 377 void TunnelManager::enableLogs(bool value) {
 378         enableLogs(value,NULL);
 379 }
 380
 381 void TunnelManager::enableLogs(bool isEnabled,LogHandler logHandler) {
 382         if (logHandler != NULL) SetLogHandler(logHandler);
 383 #ifdef ANDROID
 384         else SetLogHandler(linphone_android_tunnel_log_handler);
 385 #else
 386         else SetLogHandler(default_log_handler);
 387 #endif
 388
 389         if (isEnabled) {
 390                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN|TUNNEL_INFO);
 391         } else {
 392                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN);
 393         }
 394 }
 395
 396
 397 bool TunnelManager::isEnabled() {
 398         return mEnabled;
 399 }
 400
 401 void TunnelManager::processUdpMirrorEvent(const Event &ev){
 402         if (ev.mData.mHaveUdp) {
 403                 LOGI("Tunnel is not required, disabling");
 404                 enable(false);
 405                 mAutoDetectStarted = false;
 406         } else {
 407                 mCurrentUdpMirrorClient++;
 408                 if (mCurrentUdpMirrorClient !=mUdpMirrorClients.end()) {
 409                         // enable tunnel but also try backup server
 410                         LOGI("Tunnel is required, enabling; Trying backup udp mirror");
 411
 412                         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 413                         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 414                 } else {
 415                         LOGI("Tunnel is required, enabling; no backup udp mirror available");
 416                         mAutoDetectStarted = false;
 417                 }
 418                 enable(true);
 419         }
 420 }
 421
 422 void TunnelManager::postEvent(const Event &ev){
 423         mMutex.lock();
 424         mEvq.push(ev);
 425         mMutex.unlock();
 426 }
 427
 428 void TunnelManager::sUdpMirrorClientCallback(bool isUdpAvailable, void* data) {
 429         TunnelManager* thiz = (TunnelManager*)data;
 430         Event ev;
 431         ev.mType=UdpMirrorClientEvent;
 432         ev.mData.mHaveUdp=isUdpAvailable;
 433         thiz->postEvent(ev);
 434 }
 435
 436 void TunnelManager::autoDetect() {
 437         // first check if udp mirrors was provisionned
 438         if (mUdpMirrorClients.empty()) {
 439                 LOGE("No UDP mirror server configured aborting auto detection");
 440                 return;
 441         }
 442         if (mAutoDetectStarted) {
 443                 LOGE("auto detection already in progress, restarting");
 444                 (*mCurrentUdpMirrorClient).stop();
 445         }
 446         mAutoDetectStarted=true;
 447         mCurrentUdpMirrorClient =mUdpMirrorClients.begin();
 448         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 449         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 450
 451 }
 452
 453 void TunnelManager::setHttpProxyAuthInfo(const char* username,const char* passwd) {
 454         mHttpUserName=username?username:"";
 455         mHttpPasswd=passwd?passwd:"";
 456         if (mTunnelClient) mTunnelClient->setHttpProxyAuthInfo(username,passwd);
 457 }
 458
 459 void TunnelManager::setHttpProxy(const char *host,int port, const char *username, const char *passwd){
 460         mHttpUserName=username?username:"";
 461         mHttpPasswd=passwd?passwd:"";
 462         mHttpProxyPort=(port>0) ? port : 0;
 463         mHttpProxyHost=host ? host : "";
 464         if (mTunnelClient) mTunnelClient->setHttpProxy(host, port, username, passwd);
 465 }
 466
 467 LinphoneCore *TunnelManager::getLinphoneCore(){
 468         return mCore;
 469 }