Example #1
0
  ///\brief Debugging tool for RTMP data.
  ///
  ///Expects RTMP data of one side of the conversation through stdin, outputs human-readable information to stderr.
  ///
  ///Will output FLV file to stdout, if available.
  ///
  ///Automatically skips the handshake data.
  ///\param conf The configuration parsed from the commandline.
  ///\return The return code of the analyser.
  int analyseRTMP(Util::Config conf){
    int Detail = conf.getInteger("detail");
    if (Detail > 0){
      fprintf(stderr, "Detail level set:\n");
      if (Detail & DETAIL_RECONSTRUCT){
        fprintf(stderr, " - Will reconstuct FLV file to stdout\n");
        std::cout.write(FLV::Header, 13);
      }
      if (Detail & DETAIL_EXPLICIT){
        fprintf(stderr, " - Will list explicit video/audio data information\n");
      }
      if (Detail & DETAIL_VERBOSE){
        fprintf(stderr, " - Will list verbose chunk information\n");
      }
    }

    std::string inbuffer;
    inbuffer.reserve(3073);
    while (std::cin.good() && inbuffer.size() < 3073){
      inbuffer += std::cin.get();
    } //read all of std::cin to temp
    inbuffer.erase(0, 3073); //strip the handshake part
    RTMPStream::Chunk next;
    FLV::Tag F; //FLV holder
    AMF::Object amfdata("empty", AMF::AMF0_DDV_CONTAINER);
    AMF::Object3 amf3data("empty", AMF::AMF3_DDV_CONTAINER);

    while (std::cin.good() || inbuffer.size()){
      if (next.Parse(inbuffer)){
        if (Detail & DETAIL_VERBOSE){
          fprintf(stderr, "Chunk info: [%#2X] CS ID %u, timestamp %u, len %u, type ID %u, Stream ID %u\n", next.headertype, next.cs_id, next.timestamp,
              next.len, next.msg_type_id, next.msg_stream_id);
        }
        switch (next.msg_type_id){
          case 0: //does not exist
            fprintf(stderr, "Error chunk - %i, %i, %i, %i, %i\n", next.cs_id, next.timestamp, next.real_len, next.len_left, next.msg_stream_id);
            //return 0;
            break; //happens when connection breaks unexpectedly
          case 1: //set chunk size
            RTMPStream::chunk_rec_max = ntohl(*(int*)next.data.c_str());
            fprintf(stderr, "CTRL: Set chunk size: %i\n", RTMPStream::chunk_rec_max);
            break;
          case 2: //abort message - we ignore this one
            fprintf(stderr, "CTRL: Abort message: %i\n", ntohl(*(int*)next.data.c_str()));
            //4 bytes of stream id to drop
            break;
          case 3: //ack
            RTMPStream::snd_window_at = ntohl(*(int*)next.data.c_str());
            fprintf(stderr, "CTRL: Acknowledgement: %i\n", RTMPStream::snd_window_at);
            break;
          case 4: {
            short int ucmtype = ntohs(*(short int*)next.data.c_str());
            switch (ucmtype){
              case 0:
                fprintf(stderr, "CTRL: User control message: stream begin %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 1:
                fprintf(stderr, "CTRL: User control message: stream EOF %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 2:
                fprintf(stderr, "CTRL: User control message: stream dry %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 3:
                fprintf(stderr, "CTRL: User control message: setbufferlen %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 4:
                fprintf(stderr, "CTRL: User control message: streamisrecorded %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 6:
                fprintf(stderr, "CTRL: User control message: pingrequest %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              case 7:
                fprintf(stderr, "CTRL: User control message: pingresponse %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
              default:
                fprintf(stderr, "CTRL: User control message: UNKNOWN %hu - %u\n", ucmtype, ntohl(*(unsigned int*)(next.data.c_str()+2)));
                break;
            }
          }
            break;
          case 5: //window size of other end
            RTMPStream::rec_window_size = ntohl(*(int*)next.data.c_str());
            RTMPStream::rec_window_at = RTMPStream::rec_cnt;
            fprintf(stderr, "CTRL: Window size: %i\n", RTMPStream::rec_window_size);
            break;
          case 6:
            RTMPStream::snd_window_size = ntohl(*(int*)next.data.c_str());
            //4 bytes window size, 1 byte limit type (ignored)
            fprintf(stderr, "CTRL: Set peer bandwidth: %i\n", RTMPStream::snd_window_size);
            break;
          case 8:
            if (Detail & (DETAIL_EXPLICIT | DETAIL_RECONSTRUCT)){
              F.ChunkLoader(next);
              if (Detail & DETAIL_EXPLICIT){
                fprintf(stderr, "Received %i bytes audio data\n", next.len);
                std::cerr << "Got a " << F.len << " bytes " << F.tagType() << " FLV tag of time " << F.tagTime() << "." << std::endl;
              }
              if (Detail & DETAIL_RECONSTRUCT){
                std::cout.write(F.data, F.len);
              }
            }
            break;
          case 9:
            if (Detail & (DETAIL_EXPLICIT | DETAIL_RECONSTRUCT)){
              F.ChunkLoader(next);
              if (Detail & DETAIL_EXPLICIT){
                fprintf(stderr, "Received %i bytes video data\n", next.len);
                std::cerr << "Got a " << F.len << " bytes " << F.tagType() << " FLV tag of time " << F.tagTime() << "." << std::endl;
              }
              if (Detail & DETAIL_RECONSTRUCT){
                std::cout.write(F.data, F.len);
              }
            }
            break;
          case 15:
            fprintf(stderr, "Received AFM3 data message\n");
            break;
          case 16:
            fprintf(stderr, "Received AFM3 shared object\n");
            break;
          case 17: {
            fprintf(stderr, "Received AFM3 command message:\n");
            char soort = next.data[0];
            next.data = next.data.substr(1);
            if (soort == 0){
              amfdata = AMF::parse(next.data);
              std::cerr << amfdata.Print() << std::endl;
            }else{
              amf3data = AMF::parse3(next.data);
              amf3data.Print();
            }
          }
            break;
          case 18: {
            fprintf(stderr, "Received AFM0 data message (metadata):\n");
            amfdata = AMF::parse(next.data);
            amfdata.Print();
            if (Detail & DETAIL_RECONSTRUCT){
              F.ChunkLoader(next);
              std::cout.write(F.data, F.len);
            }
          }
            break;
          case 19:
            fprintf(stderr, "Received AFM0 shared object\n");
            break;
          case 20: { //AMF0 command message
            fprintf(stderr, "Received AFM0 command message:\n");
            amfdata = AMF::parse(next.data);
            std::cerr << amfdata.Print() << std::endl;
          }
            break;
          case 22:
            fprintf(stderr, "Received aggregate message\n");
            break;
          default:
            fprintf(stderr, "Unknown chunk received! Probably protocol corruption, stopping parsing of incoming data.\n");
            return 1;
            break;
        } //switch for type of chunk
      }else{ //if chunk parsed
        if (std::cin.good()){
          inbuffer += std::cin.get();
        }else{
          inbuffer.clear();
        }
      }
    }//while std::cin.good()
    fprintf(stderr, "No more readable data\n");
    return 0;
  }
Example #2
0
/// Tries to get and parse one RTMP chunk at a time.
void Connector_RTMP::parseChunk(Socket::Buffer & inbuffer){
  //for DTSC conversion
  static JSON::Value meta_out;
  static std::stringstream prebuffer; // Temporary buffer before sending real data
  static bool sending = false;
  static unsigned int counter = 0;
  //for chunk parsing
  static RTMPStream::Chunk next;
  FLV::Tag F;
  static AMF::Object amfdata("empty", AMF::AMF0_DDV_CONTAINER);
  static AMF::Object amfelem("empty", AMF::AMF0_DDV_CONTAINER);
  static AMF::Object3 amf3data("empty", AMF::AMF3_DDV_CONTAINER);
  static AMF::Object3 amf3elem("empty", AMF::AMF3_DDV_CONTAINER);

  while (next.Parse(inbuffer)){

    //send ACK if we received a whole window
    if ((RTMPStream::rec_cnt - RTMPStream::rec_window_at > RTMPStream::rec_window_size)){
      RTMPStream::rec_window_at = RTMPStream::rec_cnt;
      Socket.Send(RTMPStream::SendCTL(3, RTMPStream::rec_cnt));//send ack (msg 3)
    }

    switch (next.msg_type_id){
      case 0://does not exist
        #if DEBUG >= 2
        fprintf(stderr, "UNKN: Received a zero-type message. This is an error.\n");
        #endif
        break;//happens when connection breaks unexpectedly
      case 1://set chunk size
        RTMPStream::chunk_rec_max = ntohl(*(int*)next.data.c_str());
        #if DEBUG >= 4
        fprintf(stderr, "CTRL: Set chunk size: %i\n", RTMPStream::chunk_rec_max);
        #endif
        break;
      case 2://abort message - we ignore this one
        #if DEBUG >= 4
        fprintf(stderr, "CTRL: Abort message\n");
        #endif
        //4 bytes of stream id to drop
        break;
      case 3://ack
        #if DEBUG >= 4
        fprintf(stderr, "CTRL: Acknowledgement\n");
        #endif
        RTMPStream::snd_window_at = ntohl(*(int*)next.data.c_str());
        RTMPStream::snd_window_at = RTMPStream::snd_cnt;
        break;
      case 4:{
        //2 bytes event type, rest = event data
        //types:
        //0 = stream begin, 4 bytes ID
        //1 = stream EOF, 4 bytes ID
        //2 = stream dry, 4 bytes ID
        //3 = setbufferlen, 4 bytes ID, 4 bytes length
        //4 = streamisrecorded, 4 bytes ID
        //6 = pingrequest, 4 bytes data
        //7 = pingresponse, 4 bytes data
        //we don't need to process this
        #if DEBUG >= 4
        short int ucmtype = ntohs(*(short int*)next.data.c_str());
        switch (ucmtype){
          case 0: fprintf(stderr, "CTRL: UCM StreamBegin %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          case 1: fprintf(stderr, "CTRL: UCM StreamEOF %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          case 2: fprintf(stderr, "CTRL: UCM StreamDry %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          case 3: fprintf(stderr, "CTRL: UCM SetBufferLength %i %i\n", ntohl(*((int*)(next.data.c_str()+2))), ntohl(*((int*)(next.data.c_str()+6)))); break;
          case 4: fprintf(stderr, "CTRL: UCM StreamIsRecorded %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          case 6: fprintf(stderr, "CTRL: UCM PingRequest %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          case 7: fprintf(stderr, "CTRL: UCM PingResponse %i\n", ntohl(*((int*)(next.data.c_str()+2)))); break;
          default: fprintf(stderr, "CTRL: UCM Unknown (%hi)\n", ucmtype); break;
        }
        #endif
      } break;
      case 5://window size of other end
        #if DEBUG >= 4
        fprintf(stderr, "CTRL: Window size\n");
        #endif
        RTMPStream::rec_window_size = ntohl(*(int*)next.data.c_str());
        RTMPStream::rec_window_at = RTMPStream::rec_cnt;
        Socket.Send(RTMPStream::SendCTL(3, RTMPStream::rec_cnt));//send ack (msg 3)
        break;
      case 6:
        #if DEBUG >= 4
        fprintf(stderr, "CTRL: Set peer bandwidth\n");
        #endif
        //4 bytes window size, 1 byte limit type (ignored)
        RTMPStream::snd_window_size = ntohl(*(int*)next.data.c_str());
        Socket.Send(RTMPStream::SendCTL(5, RTMPStream::snd_window_size));//send window acknowledgement size (msg 5)
        break;
      case 8://audio data
      case 9://video data
      case 18://meta data
        if (SS.connected()){
          F.ChunkLoader(next);
          JSON::Value pack_out = F.toJSON(meta_out);
          if (!pack_out.isNull()){
            if (!sending){
              counter++;
              if (counter > 8){
                sending = true;
                SS.SendNow(meta_out.toNetPacked());
                SS.SendNow(prebuffer.str().c_str());//write buffer
                prebuffer.str("");//clear buffer
                SS.Send(pack_out.toNetPacked());
              }else{
                prebuffer << pack_out.toNetPacked();
              }
            }else{
              SS.SendNow(pack_out.toNetPacked());
            }
          }
        }else{
          #if DEBUG >= 4
          fprintf(stderr, "Received useless media data\n");
          #endif
          Socket.close();
        }
        break;
      case 15:
        #if DEBUG >= 4
        fprintf(stderr, "Received AFM3 data message\n");
        #endif
        break;
      case 16:
        #if DEBUG >= 4
        fprintf(stderr, "Received AFM3 shared object\n");
        #endif
        break;
      case 17:{
        #if DEBUG >= 4
        fprintf(stderr, "Received AFM3 command message\n");
        #endif
        if (next.data[0] != 0){
          next.data = next.data.substr(1);
          amf3data = AMF::parse3(next.data);
          #if DEBUG >= 4
          amf3data.Print();
          #endif
        }else{
          #if DEBUG >= 4
          fprintf(stderr, "Received AFM3-0 command message\n");
          #endif
          next.data = next.data.substr(1);
          amfdata = AMF::parse(next.data);
          parseAMFCommand(amfdata, 17, next.msg_stream_id);
        }//parsing AMF0-style
        } break;
      case 19:
        #if DEBUG >= 4
        fprintf(stderr, "Received AFM0 shared object\n");
        #endif
        break;
      case 20:{//AMF0 command message
        amfdata = AMF::parse(next.data);
        parseAMFCommand(amfdata, 20, next.msg_stream_id);
      } break;
      case 22:
        #if DEBUG >= 4
        fprintf(stderr, "Received aggregate message\n");
        #endif
        break;
      default:
        #if DEBUG >= 1
        fprintf(stderr, "Unknown chunk received! Probably protocol corruption, stopping parsing of incoming data.\n");
        #endif
        Connector_RTMP::stopparsing = true;
        break;
    }
  }
}//parseChunk