219 lines
8.3 KiB
C++
219 lines
8.3 KiB
C++
/// \file rtmp_analyser.cpp
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/// Debugging tool for RTMP data.
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <cstdlib>
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#include <mist/flv_tag.h>
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#include <mist/amf.h>
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#include <mist/rtmpchunks.h>
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#include <mist/config.h>
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#include <mist/socket.h>
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#define DETAIL_RECONSTRUCT 1
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#define DETAIL_EXPLICIT 2
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#define DETAIL_VERBOSE 4
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///\brief Holds everything unique to the analysers.
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namespace Analysers {
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///\brief Debugging tool for RTMP data.
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///
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///Expects RTMP data of one side of the conversation through stdin, outputs human-readable information to stderr.
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///
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///Will output FLV file to stdout, if available.
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///
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///Automatically skips the handshake data.
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///\param conf The configuration parsed from the commandline.
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///\return The return code of the analyser.
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int analyseRTMP(Util::Config conf){
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int Detail = conf.getInteger("detail");
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if (Detail > 0){
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fprintf(stderr, "Detail level set:\n");
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if (Detail & DETAIL_RECONSTRUCT){
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fprintf(stderr, " - Will reconstuct FLV file to stdout\n");
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std::cout.write(FLV::Header, 13);
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}
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if (Detail & DETAIL_EXPLICIT){
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fprintf(stderr, " - Will list explicit video/audio data information\n");
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}
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if (Detail & DETAIL_VERBOSE){
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fprintf(stderr, " - Will list verbose chunk information\n");
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}
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}
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std::string inbuffer;
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inbuffer.reserve(3073);
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while (std::cin.good() && inbuffer.size() < 3073){
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inbuffer += std::cin.get();
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} //read all of std::cin to temp
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inbuffer.erase(0, 3073); //strip the handshake part
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RTMPStream::rec_cnt += 3073;
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RTMPStream::Chunk next;
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FLV::Tag F; //FLV holder
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AMF::Object amfdata("empty", AMF::AMF0_DDV_CONTAINER);
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AMF::Object3 amf3data("empty", AMF::AMF3_DDV_CONTAINER);
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unsigned int read_in = 0;
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Socket::Buffer strbuf;
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while (std::cin.good() || strbuf.size()){
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if (next.Parse(strbuf)){
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if (Detail & DETAIL_VERBOSE){
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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,
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next.len, next.msg_type_id, next.msg_stream_id);
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}
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switch (next.msg_type_id){
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case 0: //does not exist
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fprintf(stderr, "Error chunk @ %lu - CS%i, T%i, L%i, LL%i, MID%i\n", read_in-inbuffer.size(), next.cs_id, next.timestamp, next.real_len, next.len_left, next.msg_stream_id);
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return 0;
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break; //happens when connection breaks unexpectedly
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case 1: //set chunk size
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RTMPStream::chunk_rec_max = ntohl(*(int*)next.data.c_str());
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fprintf(stderr, "CTRL: Set chunk size: %i\n", RTMPStream::chunk_rec_max);
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break;
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case 2: //abort message - we ignore this one
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fprintf(stderr, "CTRL: Abort message: %i\n", ntohl(*(int*)next.data.c_str()));
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//4 bytes of stream id to drop
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break;
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case 3: //ack
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RTMPStream::snd_window_at = ntohl(*(int*)next.data.c_str());
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fprintf(stderr, "CTRL: Acknowledgement: %i\n", RTMPStream::snd_window_at);
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break;
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case 4: {
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short int ucmtype = ntohs(*(short int*)next.data.c_str());
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switch (ucmtype){
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case 0:
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fprintf(stderr, "CTRL: User control message: stream begin %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 1:
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fprintf(stderr, "CTRL: User control message: stream EOF %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 2:
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fprintf(stderr, "CTRL: User control message: stream dry %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 3:
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fprintf(stderr, "CTRL: User control message: setbufferlen %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 4:
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fprintf(stderr, "CTRL: User control message: streamisrecorded %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 6:
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fprintf(stderr, "CTRL: User control message: pingrequest %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 7:
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fprintf(stderr, "CTRL: User control message: pingresponse %u\n", ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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case 31:
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case 32:
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//don't know, but not interesting anyway
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break;
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default:
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fprintf(stderr, "CTRL: User control message: UNKNOWN %hu - %u\n", ucmtype, ntohl(*(unsigned int*)(next.data.c_str()+2)));
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break;
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}
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}
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break;
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case 5: //window size of other end
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RTMPStream::rec_window_size = ntohl(*(int*)next.data.c_str());
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RTMPStream::rec_window_at = RTMPStream::rec_cnt;
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fprintf(stderr, "CTRL: Window size: %i\n", RTMPStream::rec_window_size);
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break;
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case 6:
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RTMPStream::snd_window_size = ntohl(*(int*)next.data.c_str());
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//4 bytes window size, 1 byte limit type (ignored)
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fprintf(stderr, "CTRL: Set peer bandwidth: %i\n", RTMPStream::snd_window_size);
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break;
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case 8:
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case 9:
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if (Detail & (DETAIL_EXPLICIT | DETAIL_RECONSTRUCT)){
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F.ChunkLoader(next);
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if (Detail & DETAIL_EXPLICIT){
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std::cerr << "[" << F.tagTime() << "+" << F.offset() << "] " << F.tagType() << std::endl;
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}
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if (Detail & DETAIL_RECONSTRUCT){
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std::cout.write(F.data, F.len);
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}
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}
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break;
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case 15:
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fprintf(stderr, "Received AFM3 data message\n");
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break;
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case 16:
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fprintf(stderr, "Received AFM3 shared object\n");
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break;
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case 17: {
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fprintf(stderr, "Received AFM3 command message:\n");
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char soort = next.data[0];
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next.data = next.data.substr(1);
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if (soort == 0){
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amfdata = AMF::parse(next.data);
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std::cerr << amfdata.Print() << std::endl;
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}else{
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amf3data = AMF::parse3(next.data);
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amf3data.Print();
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}
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}
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break;
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case 18: {
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fprintf(stderr, "Received AFM0 data message (metadata):\n");
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amfdata = AMF::parse(next.data);
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amfdata.Print();
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if (Detail & DETAIL_RECONSTRUCT){
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F.ChunkLoader(next);
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std::cout.write(F.data, F.len);
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}
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}
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break;
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case 19:
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fprintf(stderr, "Received AFM0 shared object\n");
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break;
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case 20: { //AMF0 command message
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fprintf(stderr, "Received AFM0 command message:\n");
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amfdata = AMF::parse(next.data);
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std::cerr << amfdata.Print() << std::endl;
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}
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break;
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case 22:
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if (Detail & DETAIL_RECONSTRUCT){
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std::cout << next.data;
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}
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break;
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default:
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fprintf(stderr, "Unknown chunk received! Probably protocol corruption, stopping parsing of incoming data.\n");
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return 1;
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break;
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} //switch for type of chunk
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}else{ //if chunk parsed
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if (std::cin.good()){
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unsigned int charCount = 0;
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std::string tmpbuffer;
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tmpbuffer.reserve(1024);
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while (std::cin.good() && charCount < 1024){
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char newchar = std::cin.get();
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if (std::cin.good()){
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tmpbuffer += newchar;
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++read_in;
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++charCount;
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}
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}
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strbuf.append(tmpbuffer);
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}else{
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strbuf.get().clear();
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}
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}
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}//while std::cin.good()
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fprintf(stderr, "No more readable data\n");
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return 0;
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}
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}
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int main(int argc, char ** argv){
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Util::Config conf = Util::Config(argv[0]);
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conf.addOption("detail",
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JSON::fromString(
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"{\"arg_num\":1, \"arg\":\"integer\", \"default\":0, \"help\":\"Bitmask, 1 = Reconstruct, 2 = Explicit media info, 4 = Verbose chunks\"}"));
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conf.parseArgs(argc, argv);
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return Analysers::analyseRTMP(conf);
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} //main
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