bool WSSession::buildPacket(PacketReader& packet) { if (packet.available()<2) return false; UInt8 type = packet.read8() & 0x0F; UInt8 lengthByte = packet.read8(); UInt32 size=lengthByte&0x7f; if (size==127) { if (packet.available()<8) return false; size = (UInt32)packet.read64(); } else if (size==126) { if (packet.available()<2) return false; size = packet.read16(); } if(lengthByte&0x80) size += 4; if (packet.available()<size) return false; packet.shrink(size); if (lengthByte & 0x80) { shared_ptr<WSUnmasking> pWSUnmasking(new WSUnmasking(invoker, packet.current(),packet.available(), type)); decode<WSUnmasking>(pWSUnmasking); } else { packet.reset(packet.position()-1); *(UInt8*)packet.current() = type; } return true; }
bool RTMFP::Decode(Exception& ex,RTMFPEngine& aesDecrypt,PacketReader& packet) { // Decrypt aesDecrypt.process(packet.current(),(UInt8*)packet.current(),packet.available()); bool result = ReadCRC(packet); if (!result) ex.set(Exception::CRYPTO, "Bad RTMFP CRC sum computing"); return result; }
bool RTMFP::Decode(AESEngine& aesDecrypt,PacketReader& packet) { // Decrypt aesDecrypt.process(packet.current(),packet.current(),packet.available()); // Check the first 2 CRC bytes packet.reset(4); UInt16 sum = packet.read16(); return (sum == CheckSum(packet)); }
void add(PacketReader& fragment) { string::size_type old = _pBuffer->size(); _pBuffer->resize(old + fragment.available(),true); if(_pBuffer->size()>old) memcpy(_pBuffer->data()+old,fragment.current(),fragment.available()); ++(UInt16&)fragments; }
void Listener::pushVideoPacket(UInt32 time,PacketReader& packet) { if(!receiveVideo) { _firstKeyFrame=false; return; } if(!_pVideoWriter) { ERROR("Listener %u must be initialized before to be used",id); return; } // key frame ? if(((*packet.current())&0xF0) == 0x10) _firstKeyFrame=true; if(!_firstKeyFrame) { DEBUG("Video frame dropped for listener %u to wait first key frame",id); ++(UInt32&)_pVideoWriter->qos.droppedFrames; return; } if(_pVideoWriter->reseted) { _pVideoWriter->reseted=false; writeBounds(); } _pVideoWriter->write(computeTime(time),packet,_unbuffered); }
void add(PacketReader& fragment) { string::size_type old = _buffer.size(); _buffer.resize(old + (string::size_type)fragment.available()); if(_buffer.size()>old) memcpy(&_buffer[old],fragment.current(),(size_t)fragment.available()); ++(UInt16&)fragments; }
void ServerConnection::packetHandler(PacketReader& packet) { UInt8 marker = packet.read8(); if(marker!=0x0b) { ERROR("ServerConnection with an unknown %u marker, it should be 0x0b",marker); return; } packet.next(2); UInt8 id = packet.read8(); switch(id) { case 0x71: { packet.next(2); string tag; packet.readString8(tag); map<string,P2PHandshakerAddress>::iterator it = _p2pHandshakers.find(tag); if(it==_p2pHandshakers.end()) { ERROR("Unknown ServerConnection tag %s on P2P handshake",tag.c_str()); break; } (SocketAddress&)_handshake.peer.address = it->second; packet.reset(0); PacketWriter writer(packet.current(),packet.available()+16); // +16 for futur 0xFFFF padding writer.clear(packet.available()); _handshake.send(writer); _p2pHandshakers.erase(it); break; } case 0x40: { if(!_connected) { // Edge hello response _connected=true; return; } // Edge keepalive PacketWriter& packet(writer()); packet.write8(0x41); packet.write16(0); flush(); INFO("Keepalive RTMFP server"); break; } case 0x45: { // Server is death! (bool&)died=true; break; } default: ERROR("Unkown ServerConnection packet id %u",id); } }
void Listener::pushDataPacket(const string& name,PacketReader& packet) { // TODO create _dataWriter ?? if(_unbuffered) { UInt16 offset = name.size()+9; if(packet.position()>=offset) { packet.reset(packet.position()-offset); _writer.writeUnbufferedMessage(packet.current(),packet.available()); return; } WARN("Written unbuffered impossible, it requires %u head bytes available on PacketReader given",offset); } StreamCopier::copyStream(packet.stream(),_writer.writeAMFPacket(name).writer.stream()); }
bool WSWriter::writeMedia(MediaType type,UInt32 time,PacketReader& packet,Parameters& properties) { if(state()==CLOSED) return true; switch(type) { case START: writeInvocation("__publishing").writeString(string((const char*)packet.current(),packet.available())); break; case STOP: writeInvocation("__unpublishing").writeString(string((const char*)packet.current(),packet.available())); break; case DATA: { JSONWriter& writer = newDataWriter(); writer.packet.write8('['); writer.packet.writeRaw(packet.current(),packet.available()); writer.packet.write8(']'); break; } case INIT: break; default: return Writer::writeMedia(type,time,packet,properties); } return true; }
void write(UInt32 time,PacketReader& data,bool unbuffered) { // if(_type==0x08) // time=0; /* if(_type==0x09) TRACE("Video timestamp : %u",_time) else TRACE("Audio timestamp : %u",_time);*/ if(unbuffered) { if(data.position()>=5) { data.reset(data.position()-5); PacketWriter writer(data.current(),5); writer.write8(_type); writer.write32(time); writeUnbufferedMessage(data.current(),data.available(),data.current(),5); return; } WARN("Written unbuffered impossible, it requires 5 head bytes available on PacketReader given"); } BinaryWriter& out = writeRawMessage(true); out.write8(_type); out.write32(time); StreamCopier::copyStream(data.stream(),out.stream()); }
void WSSession::packetHandler(PacketReader& packet) { UInt8 type = 0; Exception ex; if(peer.connected) { type = packet.read8(); switch(type) { case WS::TYPE_BINARY: { RawReader reader(packet); peer.onMessage(ex, "onMessage",reader,WS::TYPE_BINARY); break; } case WS::TYPE_TEXT: { if(!JSONReader::IsValid(packet)) { RawReader reader(packet); peer.onMessage(ex, "onMessage",reader); break; } JSONReader reader(packet); if(reader.followingType()!=JSONReader::STRING) { peer.onMessage(ex, "onMessage",reader); break; } string name; reader.readString(name); if(name=="__publish") { if(reader.followingType()!=JSONReader::STRING) { ex.set(Exception::PROTOCOL, "__publish method takes a stream name in first parameter",WS::CODE_MALFORMED_PAYLOAD); break; } reader.readString(name); if(_pPublication) invoker.unpublish(peer,_pPublication->name()); _pPublication = invoker.publish(ex, peer,name); } else if(name=="__play") { if(reader.followingType()!=JSONReader::STRING) { ex.set(Exception::PROTOCOL, "__play method takes a stream name in first parameter",WS::CODE_MALFORMED_PAYLOAD); break; } reader.readString(name); closeSusbcription(); } else if(name=="__closePublish") { closePublication(); } else if(name=="__closePlay") { closeSusbcription(); } else if (name == "__close") { closePublication(); closeSusbcription(); } else if(_pPublication) { reader.reset(); _pPublication->pushData(reader); } else peer.onMessage(ex, name,reader); break; } case WS::TYPE_CLOSE: _writer.close(packet.available() ? packet.read16() : 0); break; case WS::TYPE_PING: _writer.writePong(packet.current(),packet.available()); break; case WS::TYPE_PONG: peer.setPing(_writer.ping = (UInt16)(_time.elapsed()/1000)); break; default: ex.set(Exception::PROTOCOL, Format<UInt8>("Type %#x unknown", type), WS::CODE_MALFORMED_PAYLOAD); break; } if (ex) { ERROR(ex.error()); _writer.close((ex.code()==Exception::APPLICATION || ex.code() == Exception::SOFTWARE) ? WS::CODE_PROTOCOL_ERROR : ex.code()); } } if(!peer.connected || type==WS::TYPE_CLOSE) kill(); else _writer.flush(); }
void Flow::messageHandler(UInt32 stage,PacketReader& message,UInt8 flags) { if(_completed) return; if(stage<=_stage) { DEBUG("Stage %u on flow %u has already been received",stage,id); return; } _stage = stage; PacketReader* pMessage(NULL); if(flags&MESSAGE_WITH_BEFOREPART){ if(_sizeBuffer==0) { ERROR("A received message tells to have a 'afterpart' and nevertheless partbuffer is empty"); return; } UInt8* pOldBuffer = _pBuffer; _pBuffer = new UInt8[_sizeBuffer + message.available()](); memcpy(_pBuffer,pOldBuffer,_sizeBuffer); memcpy(_pBuffer+_sizeBuffer,message.current(),message.available()); _sizeBuffer += message.available(); delete [] pOldBuffer; if(flags&MESSAGE_WITH_AFTERPART) return; pMessage = new PacketReader(_pBuffer,_sizeBuffer); } else if(flags&MESSAGE_WITH_AFTERPART) { if(_sizeBuffer>0) { ERROR("A received message tells to have not 'beforepart' and nevertheless partbuffer exists"); delete [] _pBuffer; _sizeBuffer=0; } _sizeBuffer = message.available(); _pBuffer = new UInt8[_sizeBuffer](); memcpy(_pBuffer,message.current(),_sizeBuffer); return; } if(!pMessage) pMessage = new PacketReader(message); UInt8 type = unpack(*pMessage); if(type!=EMPTY) { writer._callbackHandle = 0; string name; AMFReader amf(*pMessage); if(type==AMF_WITH_HANDLER || type==AMF) { amf.read(name); if(type==AMF_WITH_HANDLER) { writer._callbackHandle = amf.readNumber(); amf.skipNull(); } } // create code prefix writer._code.assign(_name); if(!name.empty()) { writer._code.append("."); writer._code.push_back(toupper(name[0])); if(name.size()>1) writer._code.append(&name[1]); } switch(type) { case AMF_WITH_HANDLER: case AMF: messageHandler(name,amf); break; case AUDIO: audioHandler(*pMessage); break; case VIDEO: videoHandler(*pMessage); break; default: rawHandler(type,*pMessage); } } delete pMessage; if(flags&MESSAGE_END) complete(); if(_sizeBuffer>0) { delete [] _pBuffer; _sizeBuffer=0; } }
void Middle::targetPacketHandler(PacketReader& packet) { if(_firstResponse) ((Timestamp&)peer.lastReceptionTime).update(); // To emulate a long ping corresponding, otherwise client send multiple times each packet _firstResponse = false; UInt8 marker = packet.read8(); _timeSent = packet.read16(); // time UInt16 timeEcho(0); if((marker|0xF0) == 0xFE) timeEcho = packet.read16(); // time echo PacketWriter& packetOut = writer(); int pos = packetOut.position(); UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; UInt64 idFlow,stage; UInt8 nbPeerSent = 0; while(type!=0xFF) { int posType = packetOut.position(); packetOut.write8(type); UInt16 size = packet.read16(); PacketReader content(packet.current(),size);packetOut.write16(size); if(type==0x10 || type==0x11) { UInt8 flag = content.read8();packetOut.write8(flag); if(type==0x10) { idFlow = content.read7BitLongValue();packetOut.write7BitLongValue(idFlow); stage = content.read7BitLongValue();packetOut.write7BitLongValue(stage); packetOut.write7BitLongValue(content.read7BitLongValue()); } else ++stage; if(!(flag&MESSAGE_WITH_BEFOREPART)) { if(flag&MESSAGE_HEADER) { UInt8 len = content.read8(); packetOut.write8(len); while(len!=0) { packetOut.writeRaw(content.current(),len); content.next(len); len = content.read8(); packetOut.write8(len); } } UInt8 flagType = content.read8(); packetOut.write8(flagType); if(flagType==0x09) { UInt32 time = content.read32(); packetOut.write32(time); TRACE("Timestamp/Flag video : %u/%2x",time,*content.current()); } else if(flagType==0x08) { UInt32 time = content.read32(); packetOut.write32(time); TRACE("Timestamp/Flag audio : %u/%2x",time,*content.current()); } else if(flagType==0x04) { packetOut.write32(content.read32()); UInt16 a = content.read16();packetOut.write16(a); UInt32 b = content.read32(); packetOut.write32(b); if(content.available()>0) { UInt32 c = content.read32(); packetOut.write32(c); if(a!=0x22) { DEBUG("Raw %llu : %.2x %u %u",idFlow,a,b,c) } else { TRACE("Bound %llu : %.2x %u %u",idFlow,a,b,c); } } else DEBUG("Raw %llu : %.2x %u",idFlow,a,b) /* if(a==0x1F) { packetOut.reset(posType); content.next(content.available()); }*/ }
void Middle::packetHandler(PacketReader& packet) { if(!_pMiddleAesEncrypt) manage(); // to wait the target handshake response // Middle to target PacketWriter& request = requester(); UInt8 marker = packet.read8(); request << marker; request << packet.read16(); if((marker|0xF0) == 0xFD) request.write16(packet.read16()); // time echo int pos = request.position(); UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; while(type!=0xFF) { UInt16 size = packet.read16(); PacketReader content(packet.current(),size); PacketWriter out(request.begin()+request.position(),request.available()); // 3 for future type and size out.clear(3); if(type==0x10) { out.write8(content.read8()); UInt64 idFlow = content.read7BitLongValue();out.write7BitLongValue(idFlow); UInt64 stage = content.read7BitLongValue();out.write7BitLongValue(stage); if(idFlow==0x02 && stage==0x01) { if(!_isPeer) { /// Replace NetConnection infos out.writeRaw(content.current(),14);content.next(14); // first string string tmp; content.readString16(tmp);out.writeString16(tmp); AMFWriter writer(out); writer.amf0Preference=true; AMFReader reader(content); writer.writeNumber(reader.readNumber()); // double AMFSimpleObject obj; reader.readSimpleObject(obj); /// Replace tcUrl if(obj.has("tcUrl")) obj.setString("tcUrl",_queryUrl); writer.writeSimpleObject(obj); } else { out.writeRaw(content.current(),3);content.next(3); UInt16 netGroupHeader = content.read16();out.write16(netGroupHeader); if(netGroupHeader==0x4752) { map<string,string>::const_iterator it = peer.properties.find("groupspec"); if(it!=peer.properties.end()) { out.writeRaw(content.current(),71);content.next(71); UInt8 result1[AES_KEY_SIZE]; UInt8 result2[AES_KEY_SIZE]; HMAC(EVP_sha256(),&_sharedSecret[0],_sharedSecret.size(),&_targetNonce[0],_targetNonce.size(),result1,NULL); HMAC(EVP_sha256(),it->second.c_str(),it->second.size(),result1,AES_KEY_SIZE,result2,NULL); out.writeRaw(result2,AES_KEY_SIZE);content.next(AES_KEY_SIZE); out.writeRaw(content.current(),4);content.next(4); out.writeRaw(_target.peerId,ID_SIZE);content.next(ID_SIZE); } else WARN("No groupspec client property indicated to make working the 'man-in-the-middle' mode between peers in a NetGroup case"); } } } } else if(type == 0x4C) { kill(); return; } else if(type == 0x51) { //printf("%s\n",Util::FormatHex(content.current(),content.available()).c_str()); } out.writeRaw(content.current(),content.available()); packet.next(size); if(out.length()>=3) { request<<type; size = out.length()-3; request.write16(size);request.next(size); } type = packet.available()>0 ? packet.read8() : 0xFF; } if(request.length()>pos) sendToTarget(); }
UInt8 Handshake::handshakeHandler(UInt8 id,PacketReader& request,PacketWriter& response) { switch(id){ case 0x30: { request.read8(); // passer un caractere (boite dans boite) UInt8 epdLen = request.read8()-1; UInt8 type = request.read8(); string epd; request.readRaw(epdLen,epd); string tag; request.readRaw(16,tag); response.writeString8(tag); if(type == 0x0f) return _gateway.p2pHandshake(tag,response,peer.address,(const UInt8*)epd.c_str()); if(type == 0x0a){ /// Handshake HelloAttempt& attempt = helloAttempt<HelloAttempt>(tag); // Fill peer infos UInt16 port; string host; Util::UnpackUrl(epd,host,port,(string&)peer.path,(map<string,string>&)peer.properties); set<string> addresses; peer.onHandshake(attempt.count+1,addresses); if(!addresses.empty()) { set<string>::iterator it; for(it=addresses.begin();it!=addresses.end();++it) { try { if((*it)=="again") ((string&)*it).assign(format("%s:%hu",host,port)); SocketAddress address(*it); response.writeAddress(address,it==addresses.begin()); } catch(Exception& ex) { ERROR("Bad redirection address %s in hello attempt, %s",(*it)=="again" ? epd.c_str() : (*it).c_str(),ex.displayText().c_str()); } } return 0x71; } // New Cookie createCookie(response,attempt,tag,epd); // instance id (certificat in the middle) response.writeRaw(_certificat,sizeof(_certificat)); return 0x70; } else ERROR("Unkown handshake first way with '%02x' type",type); break; } case 0x38: { (UInt32&)farId = request.read32(); if(request.read7BitLongValue()!=COOKIE_SIZE) { ERROR("Bad handshake cookie '%s': its size should be 64 bytes",Util::FormatHex(request.current(),COOKIE_SIZE).c_str()); return 0; } map<const UInt8*,Cookie*,CompareCookies>::iterator itCookie = _cookies.find(request.current()); if(itCookie==_cookies.end()) { WARN("Cookie %s unknown, maybe already connected (udpBuffer congested?)",Util::FormatHex(request.current(),COOKIE_SIZE).c_str()); return 0; } Cookie& cookie(*itCookie->second); (SocketAddress&)cookie.peerAddress = peer.address; if(cookie.farId==0) { ((UInt32&)cookie.farId) = farId; request.next(COOKIE_SIZE); size_t size = (size_t)request.read7BitLongValue(); // peerId = SHA256(farPubKey) EVP_Digest(request.current(),size,(UInt8*)cookie.peerId,NULL,EVP_sha256(),NULL); cookie.initiatorKey().resize(request.read7BitValue()-2); request.next(2); // unknown request.readRaw(&cookie.initiatorKey()[0],cookie.initiatorKey().size()); cookie.initiatorNonce().resize(request.read7BitValue()); request.readRaw(&cookie.initiatorNonce()[0],cookie.initiatorNonce().size()); cookie.computeKeys(); } else if(cookie.id>0) { // Repeat cookie reponse! cookie.read(response); return 0x78; } // else Keys are computing (multi-thread) break; } default: ERROR("Unkown handshake packet id %u",id); } return 0; }
void Middle::targetPacketHandler(PacketReader& packet) { if(_firstResponse) _recvTimestamp.update(); // To emulate a long ping corresponding, otherwise client send multiple times each packet _firstResponse = false; UInt8 marker = packet.read8(); UInt16 timestamp = packet.read16(); // time if((marker|0xF0) == 0xFE) _timeSent = packet.read16(); // time echo PacketWriter& packetOut = writer(); int pos = packetOut.position(); UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; UInt32 idFlow,stage; UInt8 nbPeerSent = 0; while(type!=0xFF) { int posType = packetOut.position(); packetOut.write8(type); UInt16 size = packet.read16(); PacketReader content(packet.current(),size);packetOut.write16(size); if(type==0x10 || type==0x11) { UInt8 flag = content.read8();packetOut.write8(flag); if(type==0x10) { idFlow = content.read7BitValue();packetOut.write7BitValue(idFlow); stage = content.read7BitValue();packetOut.write7BitValue(stage); } else ++stage; packetOut.write7BitValue(content.read7BitValue()); if(!(flag&MESSAGE_WITH_BEFOREPART)) { if(flag&MESSAGE_HEADER) { UInt8 len = content.read8(); packetOut.write8(len); while(len!=0) { packetOut.writeRaw(content.current(),len); content.next(len); len = content.read8(); packetOut.write8(len); } } UInt8 flagType = content.read8(); packetOut.write8(flagType); if(flagType==0x09) { UInt32 time = content.read32(); packetOut.write32(time); //TRACE("Timestamp/Flag video : %u/%2x",time,*content.current()); } else if(flagType==0x08) { UInt32 time = content.read32(); packetOut.write32(time); //TRACE("Timestamp/Flag audio : %u/%2x",time,*content.current()); } else if(flagType==0x04) { packetOut.write32(content.read32()); UInt16 a = content.read16(); packetOut.write16(a); UInt32 b = content.read32(); packetOut.write32(b); UInt32 c = content.read32(); packetOut.write32(c); //TRACE("Bound %u : %u %u %u",idFlow,a,b,c); } if(flagType==0x0b && stage==0x01 && ((marker==0x4e && idFlow==0x03) || (marker==0x8e && idFlow==0x05))) { /// Replace "middleId" by "peerId" UInt8 middlePeerIdWanted[ID_SIZE]; content.readRaw(middlePeerIdWanted,ID_SIZE); ++nbPeerSent; Sessions::Iterator it; for(it=_sessions.begin();it!=_sessions.end();++it) { Middle* pMiddle = (Middle*)it->second; if(pMiddle->middlePeer() == middlePeerIdWanted) { memcpy(middlePeerIdWanted,pMiddle->peer.id,ID_SIZE); break; } } packetOut.writeRaw(middlePeerIdWanted,ID_SIZE); } else if(flagType == 0x01) { packetOut.writeRaw(content.current(),68);content.next(68); Entities<Group>::Iterator it; for(it = _invoker.groups.begin();it!=_invoker.groups.end();++it) { Group& group = *it->second; Group::Iterator itP; for(itP=group.begin();itP!=group.end();++itP) { if((**itP)==_target.id) { UInt8 result1[AES_KEY_SIZE]; UInt8 result2[AES_KEY_SIZE]; HMAC(EVP_sha256(),_target.sharedSecret,KEY_SIZE,&_target.initiatorNonce[0],_target.initiatorNonce.size(),result1,NULL); HMAC(EVP_sha256(),group.id,ID_SIZE,result1,AES_KEY_SIZE,result2,NULL); packetOut.writeRaw(result2,AES_KEY_SIZE);content.next(AES_KEY_SIZE); packetOut.writeRaw(content.current(),4);content.next(4); packetOut.writeRaw(peer.id,ID_SIZE);content.next(ID_SIZE); break; } } if(itP!=group.end()) break; } if(it==_invoker.groups.end()) ERROR("Handshake NetGroup packet between peers without corresponding Group"); } } } else if(type == 0x0F) { packetOut.writeRaw(content.current(),3);content.next(3); UInt8 peerId[ID_SIZE]; content.readRaw(peerId,ID_SIZE); if(memcmp(peerId,peer.id,ID_SIZE)!=0 && memcmp(peerId,_middlePeer.id,ID_SIZE)!=0) WARN("The p2pHandshake target packet doesn't match the peerId (or the middlePeerId)"); // Replace by the peer.id packetOut.writeRaw(peer.id,ID_SIZE); } packetOut.writeRaw(content.current(),content.available()); packet.next(size); type = packet.available()>0 ? packet.read8() : 0xFF; } if(nbPeerSent>0) INFO("%02x peers sending",nbPeerSent); if(packetOut.length()>pos) flush(); }
void add(PacketReader& fragment) { _pBuffer->append(fragment.current(),fragment.available()); ++(UInt32&)fragments; }
RTMFPPacket(const PoolBuffers& poolBuffers,PacketReader& fragment) : fragments(1),_pMessage(NULL),_pBuffer(poolBuffers,fragment.available()) { if(_pBuffer->size()>0) memcpy(_pBuffer->data(),fragment.current(),_pBuffer->size()); }
Packet(PacketReader& fragment) : fragments(1),_pMessage(NULL),_buffer((string::size_type)fragment.available()) { if(_buffer.size()>0) memcpy(&_buffer[0],fragment.current(),_buffer.size()); }
void Flow::rawHandler(UInt8 type,PacketReader& data) { ERROR("Raw message %s unknown for flow %llu",Util::FormatHex(data.current(),data.available()).c_str(),id); }
UInt8 Handshake::handshakeHandler(UInt8 id,PacketReader& request,PacketWriter& response) { switch(id){ case 0x30: { request.read8(); // passer un caractere (boite dans boite) UInt8 epdLen = request.read8()-1; UInt8 type = request.read8(); string epd; request.readRaw(epdLen,epd); string tag; request.readRaw(16,tag); response.writeString8(tag); if(type == 0x0f) return _gateway.p2pHandshake(tag,response,peer.address,(const UInt8*)epd.c_str()); if(type == 0x0a){ /// Handshake HelloAttempt& attempt = helloAttempt<HelloAttempt>(tag); if(edges().size()>0 && (_invoker.edgesAttemptsBeforeFallback==0 || attempt.count <_invoker.edgesAttemptsBeforeFallback)) { if(_invoker.edgesAttemptsBeforeFallback>0) { try { URI uri(epd); response.writeAddress(SocketAddress(uri.getHost(),uri.getPort()),false); // TODO check with true! } catch(Exception& ex) { ERROR("Parsing %s URL problem in hello attempt : %s",epd.c_str(),ex.displayText().c_str()); } } map<int,list<Edge*> > edgesSortedByCount; map<string,Edge*>::const_iterator it; for(it=edges().begin();it!=edges().end();++it) edgesSortedByCount[it->second->count].push_back(it->second); UInt8 count=0; map<int,list<Edge*> >::const_iterator it2; for(it2=edgesSortedByCount.begin();it2!=edgesSortedByCount.end();++it2) { list<Edge*>::const_iterator it3; for(it3=it2->second.begin();it3!=it2->second.end();++it3) { response.writeAddress((*it3)->address,false); if((++count)==6) // 6 redirections maximum break; } if(it3!=it2->second.end()) break; } return 0x71; } if(edges().size()>0) WARN("After %u hello attempts, impossible to connect to edges. Edges are busy? or unreachable?",_invoker.edgesAttemptsBeforeFallback); // New Cookie createCookie(response,attempt,tag,epd); // instance id (certificat in the middle) response.writeRaw(_certificat,sizeof(_certificat)); return 0x70; } else ERROR("Unkown handshake first way with '%02x' type",type); break; } case 0x39: case 0x38: { (UInt32&)farId = request.read32(); if(request.read7BitLongValue()!=COOKIE_SIZE) { ERROR("Bad handshake cookie '%s': its size should be 64 bytes",Util::FormatHex(request.current(),COOKIE_SIZE).c_str()); return 0; } map<const UInt8*,Cookie*,CompareCookies>::iterator itCookie = _cookies.find(request.current()); if(itCookie==_cookies.end()) { if(id!=0x39) { ERROR("Handshake cookie '%s' unknown",Util::FormatHex(request.current(),COOKIE_SIZE).c_str()); return 0; } Cookie* pCookie = new Cookie(); UInt32 pos = request.position(); request.readRaw((UInt8*)pCookie->value,COOKIE_SIZE); request >> (string&)pCookie->queryUrl; request.reset(pos); itCookie = _cookies.insert(pair<const UInt8*,Cookie*>(pCookie->value,pCookie)).first; } Cookie& cookie(*itCookie->second); if(cookie.id==0) { UInt8 decryptKey[AES_KEY_SIZE];UInt8* pDecryptKey=&decryptKey[0]; UInt8 encryptKey[AES_KEY_SIZE];UInt8* pEncryptKey=&encryptKey[0]; if(id==0x38) { request.next(COOKIE_SIZE); size_t size = (size_t)request.read7BitLongValue(); // peerId = SHA256(farPubKey) EVP_Digest(request.current(),size,(UInt8*)peer.id,NULL,EVP_sha256(),NULL); vector<UInt8> publicKey(request.read7BitValue()-2); request.next(2); // unknown request.readRaw(&publicKey[0],publicKey.size()); size = request.read7BitValue(); cookie.computeKeys(&publicKey[0],publicKey.size(),request.current(),(UInt16)size,decryptKey,encryptKey); } else { // edge pDecryptKey=NULL; pEncryptKey=NULL; memcpy((UInt8*)peer.id,request.current(),ID_SIZE); request.next(COOKIE_SIZE); request.next(request.read7BitEncoded()); } // Fill peer infos Util::UnpackUrl(cookie.queryUrl,(string&)peer.path,(map<string,string>&)peer.properties); // RESPONSE Session& session = _gateway.createSession(farId,peer,pDecryptKey,pEncryptKey,cookie); (UInt32&)cookie.id = session.id; string address; if(id==0x39) { // Session by edge session.flags |= SESSION_BY_EDGE; Edge* pEdge = _invoker.edges(peer.address); if(!pEdge) ERROR("Edge session creation by an unknown server edge %s",peer.address.toString().c_str()) else pEdge->addSession(session); request >> address; } else // Session direct address = session.peer.address.toString(); session.peer.addresses.clear(); session.peer.addresses.push_back(address); cookie.write(); } else
void Session::packetHandler(PacketReader& packet) { _recvTimestamp.update(); // Read packet UInt8 marker = packet.read8()|0xF0; _timeSent = packet.read16(); // with time echo if(marker == 0xFD) _peer.setPing(RTMFP::Time(_recvTimestamp.epochMicroseconds())-packet.read16()); else if(marker != 0xF9) WARN("Packet marker unknown : %02x",marker); // Variables for request (0x10 and 0x11) UInt8 flags; Flow* pFlow=NULL; UInt32 stage=0; UInt32 deltaNAck=0; UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; bool answer = false; // Can have nested queries while(type!=0xFF) { UInt16 size = packet.read16(); PacketReader message(packet.current(),size); switch(type) { case 0x0c : fail("Session failed on the client side"); break; case 0x4c : /// Session death! kill(); break; /// KeepAlive case 0x01 : writeMessage(0x41,0); case 0x41 : _timesKeepalive=0; break; case 0x5e : { // Flow exception! UInt32 id = message.read7BitValue(); FlowWriter* pFlowWriter = flowWriter(id); if(pFlowWriter) pFlowWriter->fail("receiver has rejected the flow"); else WARN("FlowWriter %u unfound for failed signal",id); break; } case 0x18 : /// This response is sent when we answer with a Acknowledgment negative // It contains the id flow // I don't unsertand the usefulness... //pFlow = &flow(message.read8()); //stage = pFlow->stageSnd(); // For the moment, we considerate it like a exception fail("ack negative from server"); // send fail message immediatly break; case 0x51 : { /// Acknowledgment UInt32 id = message.read7BitValue(); FlowWriter* pFlowWriter = flowWriter(id); if(pFlowWriter) { UInt8 ack = message.read8(); while(ack==0xFF) ack = message.read8(); if(ack>0) pFlowWriter->acknowledgment(message.read7BitValue()); else { // In fact here, we should send a 0x18 message (with id flow), // but it can create a loop... We prefer the following behavior pFlowWriter->fail("ack negative from client"); } } else WARN("FlowWriter %u unfound for acknowledgment",id); break; } /// Request // 0x10 normal request // 0x11 special request, in repeat case (following stage request) case 0x10 : { flags = message.read8(); UInt32 idFlow = message.read7BitValue(); stage = message.read7BitValue()-1; deltaNAck = message.read7BitValue()-1; map<UInt32,Flow*>::const_iterator it = _flows.find(idFlow); pFlow = it==_flows.end() ? NULL : it->second; // Header part if present if(flags & MESSAGE_HEADER) { string signature; message.readString8(signature); if(!pFlow) pFlow = createFlow(idFlow,signature); if(message.read8()>0) { // Fullduplex header part if(message.read8()!=0x0A) WARN("Unknown fullduplex header part for the flow '%u'",idFlow) else message.read7BitValue(); // Fullduplex useless here! Because we are creating a new Flow! // Useless header part UInt8 length=message.read8(); while(length>0 && message.available()) { WARN("Unknown message part on flow '%u'",idFlow); message.next(length); length=message.read8(); } if(length>0) ERROR("Bad header message part, finished before scheduled"); } } if(!pFlow) { WARN("Flow %u unfound",idFlow); ((UInt32&)_pFlowNull->id) = idFlow; pFlow = _pFlowNull; } } case 0x11 : { ++stage; ++deltaNAck; // has Header? if(type==0x11) flags = message.read8(); // Process request pFlow->fragmentHandler(stage,deltaNAck,message,flags); if(!pFlow->error().empty()) fail(pFlow->error()); // send fail message immediatly break; } default : ERROR("Message type '%02x' unknown",type); } // Next packet.next(size); type = packet.available()>0 ? packet.read8() : 0xFF; // Commit Flow if(pFlow && stage>0 && type!= 0x11) { pFlow->commit(); if(pFlow->consumed()) { _flows.erase(pFlow->id); delete pFlow; } pFlow=NULL; } }
void RTMFPSession::packetHandler(PacketReader& packet) { _recvTimestamp.update(); // Read packet UInt8 marker = packet.read8()|0xF0; _timeSent = packet.read16(); // with time echo if(marker == 0xFD) { UInt16 time = RTMFP::TimeNow(); UInt16 timeEcho = packet.read16(); if(timeEcho>time) { if(timeEcho-time<30) time=0; else time += 0xFFFF-timeEcho; timeEcho = 0; } peer.setPing((time-timeEcho)*RTMFP_TIMESTAMP_SCALE); } else if(marker != 0xF9) WARN("RTMFPPacket marker unknown : ", Format<UInt8>("%02x",marker)); // Variables for request (0x10 and 0x11) UInt8 flags; RTMFPFlow* pFlow=NULL; UInt64 stage=0; UInt64 deltaNAck=0; UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; bool answer = false; // Can have nested queries while(type!=0xFF) { UInt16 size = packet.read16(); PacketReader message(packet.current(),size); switch(type) { case 0x0c : fail("failed on client side"); break; case 0x4c : /// Session death! _failed = true; // to avoid the fail signal!! kill(); return; /// KeepAlive case 0x01 : if(!peer.connected) fail("Timeout connection client"); else writeMessage(0x41,0); case 0x41 : _timesKeepalive=0; break; case 0x5e : { // RTMFPFlow exception! UInt64 id = message.read7BitLongValue(); RTMFPWriter* pRTMFPWriter = writer(id); if(pRTMFPWriter) pRTMFPWriter->fail("Writer rejected on session ",name()); else WARN("RTMFPWriter ", id, " unfound for failed signal on session ", name()); break; } case 0x18 : /// This response is sent when we answer with a Acknowledgment negative // It contains the id flow // I don't unsertand the usefulness... //pFlow = &flow(message.read8()); //stage = pFlow->stageSnd(); // For the moment, we considerate it like a exception fail("ack negative from server"); // send fail message immediatly break; case 0x51 : { /// Acknowledgment UInt64 id = message.read7BitLongValue(); RTMFPWriter* pRTMFPWriter = writer(id); if(pRTMFPWriter) pRTMFPWriter->acknowledgment(message); else WARN("RTMFPWriter ",id," unfound for acknowledgment on session ",name()); break; } /// Request // 0x10 normal request // 0x11 special request, in repeat case (following stage request) case 0x10 : { flags = message.read8(); UInt64 idFlow = message.read7BitLongValue(); stage = message.read7BitLongValue()-1; deltaNAck = message.read7BitLongValue()-1; if (_failed) break; map<UInt64,RTMFPFlow*>::const_iterator it = _flows.find(idFlow); pFlow = it==_flows.end() ? NULL : it->second; // Header part if present if(flags & MESSAGE_HEADER) { string signature; message.readString8(signature); if(!pFlow) pFlow = createFlow(idFlow,signature); if(message.read8()>0) { // Fullduplex header part if(message.read8()!=0x0A) WARN("Unknown fullduplex header part for the flow ",idFlow) else message.read7BitLongValue(); // Fullduplex useless here! Because we are creating a new RTMFPFlow! // Useless header part UInt8 length=message.read8(); while(length>0 && message.available()) { WARN("Unknown message part on flow ",idFlow); message.next(length); length=message.read8(); } if(length>0) ERROR("Bad header message part, finished before scheduled"); } } if(!pFlow) { WARN("RTMFPFlow ",idFlow," unfound"); ((UInt64&)_pFlowNull->id) = idFlow; pFlow = _pFlowNull; } } case 0x11 : { ++stage; ++deltaNAck; // has Header? if(type==0x11) flags = message.read8(); // Process request if (pFlow) pFlow->fragmentHandler(stage, deltaNAck, message, flags); break; } default : ERROR("RTMFPMessage type '", Format<UInt8>("%02x", type), "' unknown"); } // Next packet.next(size); type = packet.available()>0 ? packet.read8() : 0xFF; // Commit RTMFPFlow if(pFlow && type!= 0x11) { pFlow->commit(); if(pFlow->consumed()) { _flows.erase(pFlow->id); delete pFlow; } pFlow=NULL; } }
bool RTMFP::Decode(AESEngine& aesDecrypt,PacketReader& packet) { // Decrypt aesDecrypt.process(packet.current(),packet.current(),packet.available()); return ReadCRC(packet); }
void Middle::packetHandler(PacketReader& packet) { if(!_pMiddleAesEncrypt) { DEBUG("500ms sleeping to wait target handshaking"); Thread::sleep(500); // to wait the target handshake response manage(); } // Middle to target PacketWriter& request = requester(); UInt8 marker = packet.read8(); request << marker; request << packet.read16(); if((marker|0xF0) == 0xFD) request.write16(packet.read16()); // time echo int pos = request.position(); UInt8 type = packet.available()>0 ? packet.read8() : 0xFF; while(type!=0xFF) { UInt16 size = packet.read16(); PacketReader content(packet.current(),size); PacketWriter out(request.begin()+request.position(),request.available()); // 3 for future type and size out.clear(3); if(type==0x10) { out.write8(content.read8()); UInt32 idFlow = content.read7BitValue();out.write7BitValue(idFlow); UInt32 stage = content.read7BitValue();out.write7BitValue(stage); if(idFlow==0x02 && stage==0x01) { if(!_isPeer) { /// Replace NetConnection infos out.writeRaw(content.current(),14);content.next(14); // first string string tmp; content.readString16(tmp);out.writeString16(tmp); AMFWriter writer(out); writer.amf0Preference=true; AMFReader reader(content); writer.writeNumber(reader.readNumber()); // double AMFSimpleObject obj; reader.readSimpleObject(obj); /// Replace tcUrl if(obj.has("tcUrl")) obj.setString("tcUrl",_queryUrl); writer.writeSimpleObject(obj); } else { out.writeRaw(content.current(),3);content.next(3); UInt16 netGroupHeader = content.read16();out.write16(netGroupHeader); if(netGroupHeader==0x4752) { out.writeRaw(content.current(),71);content.next(71); Entities<Group>::Iterator it; for(it = _invoker.groups.begin();it!=_invoker.groups.end();++it) { Group& group = *it->second; Group::Iterator itP; for(itP=group.begin();itP!=group.end();++itP) { if((**itP)==_target.id) { UInt8 result1[AES_KEY_SIZE]; UInt8 result2[AES_KEY_SIZE]; HMAC(EVP_sha256(),_sharedSecret,KEY_SIZE,&_targetNonce[0],_targetNonce.size(),result1,NULL); HMAC(EVP_sha256(),group.id,ID_SIZE,result1,AES_KEY_SIZE,result2,NULL); out.writeRaw(result2,AES_KEY_SIZE);content.next(AES_KEY_SIZE); out.writeRaw(content.current(),4);content.next(4); out.writeRaw(_target.peerId,ID_SIZE);content.next(ID_SIZE); break; } } if(itP!=group.end()) break; } if(it==_invoker.groups.end()) ERROR("Handshake NetGroup packet between peers without corresponding Group"); } } } } else if(type == 0x4C) { kill(); } else if(type == 0x51) { //printf("%s\n",Util::FormatHex(content.current(),content.available()).c_str()); } out.writeRaw(content.current(),content.available()); packet.next(size); if(out.length()>=3) { request<<type; size = out.length()-3; request.write16(size);request.next(size); } type = packet.available()>0 ? packet.read8() : 0xFF; } if(request.length()>pos) sendToTarget(); }