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         if (ip == NULL) {
 106                 ip = "";
 107                 ms_warning("Adding tunnel server with empty ip, it will not work!");
 108         }
 109         addServer(ip,port);
 110         mUdpMirrorClients.push_back(UdpMirrorClient(ServerAddr(ip,udpMirrorPort),delay));
 111 }
 112
 113 void TunnelManager::addServer(const char *ip, int port) {
 114         if (ip == NULL) {
 115                 ip = "";
 116                 ms_warning("Adding tunnel server with empty ip, it will not work!");
 117         }
 118         mServerAddrs.push_back(ServerAddr(ip,port));
 119         if (mTunnelClient) mTunnelClient->addServer(ip,port);
 120 }
 121
 122 void TunnelManager::cleanServers() {
 123         mServerAddrs.clear();
 124
 125         UdpMirrorClientList::iterator it;
 126         mAutoDetectStarted=false;
 127         for (it = mUdpMirrorClients.begin(); it != mUdpMirrorClients.end();) {
 128                 UdpMirrorClient& s=*it++;
 129                 s.stop();
 130         }
 131         mUdpMirrorClients.clear();
 132         if (mTunnelClient) mTunnelClient->cleanServers();
 133 }
 134
 135 void TunnelManager::reconnect(){
 136         if (mTunnelClient)
 137                 mTunnelClient->reconnect();
 138 }
 139
 140 void TunnelManager::setCallback(StateCallback cb, void *userdata) {
 141         mCallback=cb;
 142         mCallbackData=userdata;
 143 }
 144
 145 static void sCloseRtpTransport(RtpTransport *t, void *userData){
 146         TunnelSocket *s=(TunnelSocket*)userData;
 147         TunnelManager *manager=(TunnelManager*)s->getUserPointer();
 148         manager->closeRtpTransport(t, s);
 149 }
 150 void TunnelManager::closeRtpTransport(RtpTransport *t, TunnelSocket *s){
 151         mTunnelClient->closeSocket(s);
 152         ms_free(t);
 153 }
 154
 155 static RtpTransport *sCreateRtpTransport(void* userData, int port){
 156         return ((TunnelManager *) userData)->createRtpTransport(port);
 157 }
 158
 159 RtpTransport *TunnelManager::createRtpTransport(int port){
 160         TunnelSocket *socket=mTunnelClient->createSocket(port);
 161         socket->setUserPointer(this);
 162         RtpTransport *t=ms_new0(RtpTransport,1);
 163         t->t_getsocket=NULL;
 164         t->t_recvfrom=customRecvfrom;
 165         t->t_sendto=customSendto;
 166         t->t_close=sCloseRtpTransport;
 167         t->data=socket;
 168         return t;
 169 }
 170
 171 void TunnelManager::start() {
 172         if (!mTunnelClient) {
 173                 mTunnelClient = new TunnelClient();
 174                 mTunnelClient->setCallback((StateCallback)tunnelCallback,this);
 175                 list<ServerAddr>::iterator it;
 176                 for(it=mServerAddrs.begin();it!=mServerAddrs.end();++it){
 177                         const ServerAddr &addr=*it;
 178                         mTunnelClient->addServer(addr.mAddr.c_str(), addr.mPort);
 179                 }
 180                 mTunnelClient->setHttpProxy(mHttpProxyHost.c_str(), mHttpProxyPort, mHttpUserName.c_str(), mHttpPasswd.c_str());
 181         }
 182         mTunnelClient->start();
 183
 184         if (mSipSocket == NULL) mSipSocket =mTunnelClient->createSocket(5060);
 185 }
 186
 187 bool TunnelManager::isStarted() {
 188         return mTunnelClient != 0 && mTunnelClient->isStarted();
 189 }
 190
 191 bool TunnelManager::isReady() const {
 192         return mTunnelClient && mTunnelClient->isReady();
 193 }
 194
 195 int TunnelManager::customSendto(struct _RtpTransport *t, mblk_t *msg , int flags, const struct sockaddr *to, socklen_t tolen){
 196         int size;
 197         msgpullup(msg,-1);
 198         size=msgdsize(msg);
 199         ((TunnelSocket*)t->data)->sendto(msg->b_rptr,size,to,tolen);
 200         return size;
 201 }
 202
 203 int TunnelManager::customRecvfrom(struct _RtpTransport *t, mblk_t *msg, int flags, struct sockaddr *from, socklen_t *fromlen){
 204         int err=((TunnelSocket*)t->data)->recvfrom(msg->b_wptr,msg->b_datap->db_lim-msg->b_datap->db_base,from,*fromlen);
 205         if (err>0) return err;
 206         return 0;
 207 }
 208
 209
 210 TunnelManager::TunnelManager(LinphoneCore* lc) :TunnelClientController()
 211 ,mCore(lc)
 212 ,mSipSocket(NULL)
 213 ,mCallback(NULL)
 214 ,mEnabled(false)
 215 ,mTunnelClient(NULL)
 216 ,mAutoDetectStarted(false)
 217 ,mHttpProxyPort(0){
 218
 219         mExosipTransport.data=this;
 220         mExosipTransport.recvfrom=eXosipRecvfrom;
 221         mExosipTransport.sendto=eXosipSendto;
 222         mExosipTransport.select=eXosipSelect;
 223         linphone_core_add_iterate_hook(mCore,(LinphoneCoreIterateHook)sOnIterate,this);
 224         mTransportFactories.audio_rtcp_func=sCreateRtpTransport;
 225         mTransportFactories.audio_rtcp_func_data=this;
 226         mTransportFactories.audio_rtp_func=sCreateRtpTransport;
 227         mTransportFactories.audio_rtp_func_data=this;
 228         mTransportFactories.video_rtcp_func=sCreateRtpTransport;
 229         mTransportFactories.video_rtcp_func_data=this;
 230         mTransportFactories.video_rtp_func=sCreateRtpTransport;
 231         mTransportFactories.video_rtp_func_data=this;
 232 }
 233
 234 TunnelManager::~TunnelManager(){
 235         stopClient();
 236 }
 237
 238 void TunnelManager::stopClient(){
 239         eXosip_transport_hook_register(NULL);
 240         if (mSipSocket != NULL){
 241                 sMutex.lock();
 242                 mTunnelClient->closeSocket(mSipSocket);
 243                 mSipSocket = NULL;
 244                 sMutex.unlock();
 245         }
 246         if (mTunnelClient){
 247                 delete mTunnelClient;
 248                 mTunnelClient=NULL;
 249         }
 250 }
 251
 252 void TunnelManager::processTunnelEvent(const Event &ev){
 253         LinphoneProxyConfig* lProxy;
 254         linphone_core_get_default_proxy(mCore, &lProxy);
 255
 256         if (mEnabled && mTunnelClient->isReady()){
 257                 ms_message("Tunnel is up, registering now");
 258                 linphone_core_set_firewall_policy(mCore,LinphonePolicyNoFirewall);
 259                 linphone_core_set_rtp_transport_factories(mCore,&mTransportFactories);
 260                 eXosip_transport_hook_register(&mExosipTransport);
 261                 //force transport to udp
 262                 LCSipTransports lTransport;
 263
 264                 lTransport.udp_port=(0xDFFF&random())+1024;
 265                 lTransport.tcp_port=0;
 266                 lTransport.tls_port=0;
 267                 lTransport.dtls_port=0;
 268
 269                 linphone_core_set_sip_transports(mCore, &lTransport);
 270                 //register
 271                 if (lProxy) {
 272                         linphone_proxy_config_done(lProxy);
 273                 }
 274         }else if (mEnabled && !mTunnelClient->isReady()){
 275                 /* we got disconnected from the tunnel */
 276                 if (lProxy && linphone_proxy_config_is_registered(lProxy)) {
 277                         /*forces de-registration so that we register again when the tunnel is up*/
 278                         linphone_proxy_config_edit(lProxy);
 279                         linphone_core_iterate(mCore);
 280                 }
 281         }
 282 }
 283
 284 void TunnelManager::waitUnRegistration(){
 285         LinphoneProxyConfig* lProxy;
 286         linphone_core_get_default_proxy(mCore, &lProxy);
 287         if (lProxy && linphone_proxy_config_get_state(lProxy)==LinphoneRegistrationOk) {
 288                 int i=0;
 289                 linphone_proxy_config_edit(lProxy);
 290                 //make sure unregister is sent and authenticated
 291                 do{
 292                         linphone_core_iterate(mCore);
 293                         ms_usleep(20000);
 294                         if (i>100){
 295                                 ms_message("tunnel: timeout for unregistration expired, giving up");
 296                                 break;
 297                         }
 298                         i++;
 299                 }while(linphone_proxy_config_get_state(lProxy)!=LinphoneRegistrationCleared);
 300         }
 301 }
 302
 303 void TunnelManager::enable(bool isEnable) {
 304         ms_message("Turning tunnel [%s]",(isEnable?"on":"off"));
 305         if (isEnable && !mEnabled){
 306                 mEnabled=true;
 307                 //1 save transport and firewall policy
 308                 linphone_core_get_sip_transports(mCore, &mRegularTransport);
 309                 mPreviousFirewallPolicy=linphone_core_get_firewall_policy(mCore);
 310                 //2 unregister
 311                 waitUnRegistration();
 312                 //3 insert tunnel
 313                 start();
 314         }else if (!isEnable && mEnabled){
 315                 //1 unregister
 316                 waitUnRegistration();
 317
 318                 mEnabled=false;
 319                 stopClient();
 320
 321                 linphone_core_set_rtp_transport_factories(mCore,NULL);
 322
 323                 eXosip_transport_hook_register(NULL);
 324                 //Restore transport and firewall policy
 325                 linphone_core_set_sip_transports(mCore, &mRegularTransport);
 326                 linphone_core_set_firewall_policy(mCore, mPreviousFirewallPolicy);
 327                 //register
 328                 LinphoneProxyConfig* lProxy;
 329                 linphone_core_get_default_proxy(mCore, &lProxy);
 330                 if (lProxy) {
 331                         linphone_proxy_config_done(lProxy);
 332                 }
 333
 334         }
 335 }
 336
 337 void TunnelManager::tunnelCallback(bool connected, TunnelManager *zis){
 338         Event ev;
 339         ev.mType=TunnelEvent;
 340         ev.mData.mConnected=connected;
 341         zis->postEvent(ev);
 342 }
 343
 344 void TunnelManager::onIterate(){
 345         mMutex.lock();
 346         while(!mEvq.empty()){
 347                 Event ev=mEvq.front();
 348                 mEvq.pop();
 349                 mMutex.unlock();
 350                 if (ev.mType==TunnelEvent)
 351                         processTunnelEvent(ev);
 352                 else if (ev.mType==UdpMirrorClientEvent){
 353                         processUdpMirrorEvent(ev);
 354                 }
 355                 mMutex.lock();
 356         }
 357         mMutex.unlock();
 358 }
 359
 360 /*invoked from linphone_core_iterate() */
 361 void TunnelManager::sOnIterate(TunnelManager *zis){
 362         zis->onIterate();
 363 }
 364
 365 #ifdef ANDROID
 366 extern void linphone_android_log_handler(int prio, const char *fmt, va_list args);
 367 static void linphone_android_tunnel_log_handler(int lev, const char *fmt, va_list args) {
 368         int prio;
 369         switch(lev){
 370         case TUNNEL_DEBUG:      prio = ANDROID_LOG_DEBUG;       break;
 371         case TUNNEL_INFO:       prio = ANDROID_LOG_INFO;        break;
 372         case TUNNEL_NOTICE:     prio = ANDROID_LOG_INFO;        break;
 373         case TUNNEL_WARN:       prio = ANDROID_LOG_WARN;        break;
 374         case TUNNEL_ERROR:      prio = ANDROID_LOG_ERROR;       break;
 375         default:                prio = ANDROID_LOG_DEFAULT;     break;
 376         }
 377         linphone_android_log_handler(prio, fmt, args);
 378 }
 379 #endif /*ANDROID*/
 380
 381 void TunnelManager::enableLogs(bool value) {
 382         enableLogs(value,NULL);
 383 }
 384
 385 void TunnelManager::enableLogs(bool isEnabled,LogHandler logHandler) {
 386         if (logHandler != NULL) SetLogHandler(logHandler);
 387 #ifdef ANDROID
 388         else SetLogHandler(linphone_android_tunnel_log_handler);
 389 #else
 390         else SetLogHandler(default_log_handler);
 391 #endif
 392
 393         if (isEnabled) {
 394                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN|TUNNEL_INFO);
 395         } else {
 396                 SetLogLevel(TUNNEL_ERROR|TUNNEL_WARN);
 397         }
 398 }
 399
 400
 401 bool TunnelManager::isEnabled() {
 402         return mEnabled;
 403 }
 404
 405 void TunnelManager::processUdpMirrorEvent(const Event &ev){
 406         if (ev.mData.mHaveUdp) {
 407                 LOGI("Tunnel is not required, disabling");
 408                 enable(false);
 409                 mAutoDetectStarted = false;
 410         } else {
 411                 mCurrentUdpMirrorClient++;
 412                 if (mCurrentUdpMirrorClient !=mUdpMirrorClients.end()) {
 413                         // enable tunnel but also try backup server
 414                         LOGI("Tunnel is required, enabling; Trying backup udp mirror");
 415
 416                         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 417                         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 418                 } else {
 419                         LOGI("Tunnel is required, enabling; no backup udp mirror available");
 420                         mAutoDetectStarted = false;
 421                 }
 422                 enable(true);
 423         }
 424 }
 425
 426 void TunnelManager::postEvent(const Event &ev){
 427         mMutex.lock();
 428         mEvq.push(ev);
 429         mMutex.unlock();
 430 }
 431
 432 void TunnelManager::sUdpMirrorClientCallback(bool isUdpAvailable, void* data) {
 433         TunnelManager* thiz = (TunnelManager*)data;
 434         Event ev;
 435         ev.mType=UdpMirrorClientEvent;
 436         ev.mData.mHaveUdp=isUdpAvailable;
 437         thiz->postEvent(ev);
 438 }
 439
 440 void TunnelManager::autoDetect() {
 441         // first check if udp mirrors was provisionned
 442         if (mUdpMirrorClients.empty()) {
 443                 LOGE("No UDP mirror server configured aborting auto detection");
 444                 return;
 445         }
 446         if (mAutoDetectStarted) {
 447                 LOGE("auto detection already in progress, restarting");
 448                 (*mCurrentUdpMirrorClient).stop();
 449         }
 450         mAutoDetectStarted=true;
 451         mCurrentUdpMirrorClient =mUdpMirrorClients.begin();
 452         UdpMirrorClient &lUdpMirrorClient=*mCurrentUdpMirrorClient;
 453         lUdpMirrorClient.start(TunnelManager::sUdpMirrorClientCallback,(void*)this);
 454
 455 }
 456
 457 void TunnelManager::setHttpProxyAuthInfo(const char* username,const char* passwd) {
 458         mHttpUserName=username?username:"";
 459         mHttpPasswd=passwd?passwd:"";
 460         if (mTunnelClient) mTunnelClient->setHttpProxyAuthInfo(username,passwd);
 461 }
 462
 463 void TunnelManager::setHttpProxy(const char *host,int port, const char *username, const char *passwd){
 464         mHttpUserName=username?username:"";
 465         mHttpPasswd=passwd?passwd:"";
 466         mHttpProxyPort=(port>0) ? port : 0;
 467         mHttpProxyHost=host ? host : "";
 468         if (mTunnelClient) mTunnelClient->setHttpProxy(host, port, username, passwd);
 469 }
 470
 471 LinphoneCore *TunnelManager::getLinphoneCore(){
 472         return mCore;
 473 }