mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-25 20:27:34 +08:00
Merge branch 'feature/srt' of github.com:ZLMediaKit/ZLMediaKit
This commit is contained in:
xiongziliang
commit
fd11c53a78
@ -106,6 +106,7 @@ option(ENABLE_FFMPEG "Enable FFmpeg" true)
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option(ENABLE_MSVC_MT "Enable MSVC Mt/Mtd lib" true)
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option(ENABLE_API_STATIC_LIB "Enable mk_api static lib" false)
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option(USE_SOLUTION_FOLDERS "Enable solution dir supported" ON)
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option(ENABLE_SRT "Enable SRT" true)
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# ----------------------------------------------------------------------------
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# Solution folders:
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# ----------------------------------------------------------------------------
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@ -486,6 +487,15 @@ if (ENABLE_WEBRTC)
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endif ()
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endif ()
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if (ENABLE_SRT)
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add_definitions(-DENABLE_SRT)
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include_directories(./srt)
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file(GLOB SRC_SRT_LIST ./srt/*.cpp ./srt/*.h ./srt/*.hpp)
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add_library(srt ${SRC_SRT_LIST})
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list(APPEND LINK_LIB_LIST srt)
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message(STATUS "srt 功能已开启")
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endif()
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#添加c库
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if (ENABLE_API)
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add_subdirectory(api)
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@ -107,7 +107,7 @@
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- 支持rtp扩展解析
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- 支持GOP缓冲，webrtc播放秒开
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- 支持datachannel
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- [SRT支持](./srt/srt.md)
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- 其他
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- 支持丰富的restful api以及web hook事件
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- 支持简单的telnet调试
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@ -61,7 +61,7 @@
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- Support simulcast
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- Support rtx/nack
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- Support transport-cc rtcp/rtp ext
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- [SRT support](./srt/srt_en.md)
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- Others
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- Support stream proxy by ffmpeg.
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- RESTful http api and http hook event api.
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@ -284,6 +284,17 @@ preferredCodecA=PCMU,PCMA,opus,mpeg4-generic
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#以下范例为所有支持的视频codec
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preferredCodecV=H264,H265,AV1X,VP9,VP8
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[srt]
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#srt播放推流、播放超时时间,单位秒
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timeoutSec=5
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#srt udp服务器监听端口号，所有srt客户端将通过该端口传输srt数据，
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#该端口是多线程的，同时支持客户端网络切换导致的连接迁移
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port=9000
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#srt 协议中延迟缓存的估算参数，在握手阶段估算rtt ,然后latencyMul*rtt 为最大缓存时长，此参数越大，表示等待重传的时长就越大
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latencyMul=4
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[rtsp]
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#rtsp专有鉴权方式是采用base64还是md5方式
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authBasic=0
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@ -32,6 +32,11 @@
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#include "../webrtc/WebRtcSession.h"
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#endif
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#if defined(ENABLE_SRT)
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#include "../srt/SrtSession.hpp"
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#include "../srt/SrtTransport.hpp"
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#endif
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#if defined(ENABLE_VERSION)
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#include "version.h"
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#endif
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@ -284,6 +289,24 @@ int start_main(int argc,char *argv[]) {
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uint16_t rtcPort = mINI::Instance()[RTC::kPort];
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#endif//defined(ENABLE_WEBRTC)
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#if defined(ENABLE_SRT)
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auto srtSrv = std::make_shared<UdpServer>();
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srtSrv->setOnCreateSocket([](const EventPoller::Ptr &poller, const Buffer::Ptr &buf, struct sockaddr *, int) {
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if (!buf) {
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return Socket::createSocket(poller, false);
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}
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auto new_poller = SRT::SrtSession::queryPoller(buf);
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if (!new_poller) {
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//握手第一阶段
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return Socket::createSocket(poller, false);
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}
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return Socket::createSocket(new_poller, false);
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});
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uint16_t srtPort = mINI::Instance()[SRT::kPort];
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#endif //defined(ENABLE_SRT)
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try {
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//rtsp服务器，端口默认554
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if (rtspPort) { rtspSrv->start<RtspSession>(rtspPort); }
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@ -313,6 +336,14 @@ int start_main(int argc,char *argv[]) {
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if (rtcPort) { rtcSrv->start<WebRtcSession>(rtcPort); }
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#endif//defined(ENABLE_WEBRTC)
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#if defined(ENABLE_SRT)
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// srt udp服务器
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if(srtPort){
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srtSrv->start<SRT::SrtSession>(srtPort);
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}
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#endif//defined(ENABLE_SRT)
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} catch (std::exception &ex) {
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WarnL << "端口占用或无权限:" << ex.what() << endl;
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ErrorL << "程序启动失败，请修改配置文件中端口号后重试!" << endl;
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@ -38,6 +38,7 @@ string getOriginTypeString(MediaOriginType type){
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SWITCH_CASE(mp4_vod);
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SWITCH_CASE(device_chn);
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SWITCH_CASE(rtc_push);
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SWITCH_CASE(srt_push);
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default : return "unknown";
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}
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}
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@ -45,6 +45,7 @@ enum class MediaOriginType : uint8_t {
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mp4_vod,
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device_chn,
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rtc_push,
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srt_push
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};
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std::string getOriginTypeString(MediaOriginType type);
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85
srt/Ack.cpp
Normal file
85
srt/Ack.cpp
Normal file
@ -0,0 +1,85 @@
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#include "Ack.hpp"
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#include "Common.hpp"
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namespace SRT {
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bool ACKPacket::loadFromData(uint8_t *buf, size_t len) {
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if (len < ACK_CIF_SIZE + ControlPacket::HEADER_SIZE) {
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return false;
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}
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_data = BufferRaw::create();
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_data->assign((char *)(buf), len);
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ControlPacket::loadHeader();
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ack_number = loadUint32(type_specific_info);
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uint8_t *ptr = (uint8_t *)_data->data() + ControlPacket::HEADER_SIZE;
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last_ack_pkt_seq_number = loadUint32(ptr);
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ptr += 4;
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rtt = loadUint32(ptr);
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ptr += 4;
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rtt_variance = loadUint32(ptr);
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ptr += 4;
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available_buf_size = loadUint32(ptr);
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ptr += 4;
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pkt_recv_rate = loadUint32(ptr);
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ptr += 4;
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estimated_link_capacity = loadUint32(ptr);
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ptr += 4;
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recv_rate = loadUint32(ptr);
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ptr += 4;
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return true;
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}
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bool ACKPacket::storeToData() {
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_data = BufferRaw::create();
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_data->setCapacity(HEADER_SIZE + ACK_CIF_SIZE);
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_data->setSize(HEADER_SIZE + ACK_CIF_SIZE);
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control_type = ControlPacket::ACK;
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sub_type = 0;
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storeUint32(type_specific_info, ack_number);
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storeToHeader();
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uint8_t *ptr = (uint8_t *)_data->data() + ControlPacket::HEADER_SIZE;
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storeUint32(ptr, last_ack_pkt_seq_number);
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ptr += 4;
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storeUint32(ptr, rtt);
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ptr += 4;
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storeUint32(ptr, rtt_variance);
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ptr += 4;
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storeUint32(ptr, pkt_recv_rate);
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ptr += 4;
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storeUint32(ptr, available_buf_size);
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ptr += 4;
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storeUint32(ptr, estimated_link_capacity);
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ptr += 4;
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storeUint32(ptr, recv_rate);
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ptr += 4;
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return true;
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}
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std::string ACKPacket::dump() {
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_StrPrinter printer;
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printer << "last_ack_pkt_seq_number=" << last_ack_pkt_seq_number << " rtt=" << rtt
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<< " rtt_variance=" << rtt_variance << " pkt_recv_rate=" << pkt_recv_rate
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<< " available_buf_size=" << available_buf_size << " estimated_link_capacity=" << estimated_link_capacity
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<< " recv_rate=" << recv_rate;
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return std::move(printer);
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}
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} // namespace SRT
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90
srt/Ack.hpp
Normal file
90
srt/Ack.hpp
Normal file
@ -0,0 +1,90 @@
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#ifndef ZLMEDIAKIT_SRT_ACK_H
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#define ZLMEDIAKIT_SRT_ACK_H
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#include "Packet.hpp"
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namespace SRT {
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/*
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
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|1| Control Type | Reserved |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Acknowledgement Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Timestamp |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Destination Socket ID |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- CIF -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Last Acknowledged Packet Sequence Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| RTT |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| RTT Variance |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Available Buffer Size |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Packets Receiving Rate |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Estimated Link Capacity |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Receiving Rate |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Figure 13: ACK control packet
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https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-ack-acknowledgment
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*/
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class ACKPacket : public ControlPacket {
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public:
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using Ptr = std::shared_ptr<ACKPacket>;
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ACKPacket() = default;
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~ACKPacket() = default;
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enum { ACK_CIF_SIZE = 7 * 4 };
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std::string dump();
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///////ControlPacket override///////
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bool loadFromData(uint8_t *buf, size_t len) override;
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bool storeToData() override;
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uint32_t ack_number;
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uint32_t last_ack_pkt_seq_number;
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uint32_t rtt;
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uint32_t rtt_variance;
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uint32_t available_buf_size;
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uint32_t pkt_recv_rate;
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uint32_t estimated_link_capacity;
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uint32_t recv_rate;
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};
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class ACKACKPacket : public ControlPacket {
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public:
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using Ptr = std::shared_ptr<ACKACKPacket>;
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ACKACKPacket() = default;
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~ACKACKPacket() = default;
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///////ControlPacket override///////
|
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bool loadFromData(uint8_t *buf, size_t len) override {
|
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if (len < ControlPacket::HEADER_SIZE) {
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return false;
|
||||
}
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_data = BufferRaw::create();
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_data->assign((char *)(buf), len);
|
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ControlPacket::loadHeader();
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ack_number = loadUint32(type_specific_info);
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return true;
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}
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bool storeToData() override {
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_data = BufferRaw::create();
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_data->setCapacity(HEADER_SIZE);
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_data->setSize(HEADER_SIZE);
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control_type = ControlPacket::ACKACK;
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sub_type = 0;
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|
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storeUint32(type_specific_info, ack_number);
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storeToHeader();
|
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return true;
|
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}
|
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|
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uint32_t ack_number;
|
||||
};
|
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|
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} // namespace SRT
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||||
#endif // ZLMEDIAKIT_SRT_ACK_H
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||||
96
srt/Common.hpp
Normal file
96
srt/Common.hpp
Normal file
@ -0,0 +1,96 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_COMMON_H
|
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#define ZLMEDIAKIT_SRT_COMMON_H
|
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#if defined(_WIN32)
|
||||
#include <winsock2.h>
|
||||
#include <ws2tcpip.h>
|
||||
|
||||
#include <Iphlpapi.h>
|
||||
#pragma comment(lib, "Ws2_32.lib")
|
||||
#pragma comment(lib, "Iphlpapi.lib")
|
||||
#else
|
||||
#include <netdb.h>
|
||||
#include <sys/socket.h>
|
||||
#endif // defined(_WIN32)
|
||||
|
||||
#include <chrono>
|
||||
#define MAX_SEQ 0x7fffffff
|
||||
#define MAX_TS 0xffffffff
|
||||
|
||||
namespace SRT {
|
||||
using SteadyClock = std::chrono::steady_clock;
|
||||
using TimePoint = std::chrono::time_point<SteadyClock>;
|
||||
|
||||
using Microseconds = std::chrono::microseconds;
|
||||
using Milliseconds = std::chrono::milliseconds;
|
||||
|
||||
static inline int64_t DurationCountMicroseconds(SteadyClock::duration dur) {
|
||||
return std::chrono::duration_cast<std::chrono::microseconds>(dur).count();
|
||||
}
|
||||
|
||||
static inline uint32_t loadUint32(uint8_t *ptr) {
|
||||
return ptr[0] << 24 | ptr[1] << 16 | ptr[2] << 8 | ptr[3];
|
||||
}
|
||||
|
||||
static inline uint16_t loadUint16(uint8_t *ptr) {
|
||||
return ptr[0] << 8 | ptr[1];
|
||||
}
|
||||
|
||||
static inline void storeUint32(uint8_t *buf, uint32_t val) {
|
||||
buf[0] = val >> 24;
|
||||
buf[1] = (val >> 16) & 0xff;
|
||||
buf[2] = (val >> 8) & 0xff;
|
||||
buf[3] = val & 0xff;
|
||||
}
|
||||
|
||||
static inline void storeUint16(uint8_t *buf, uint16_t val) {
|
||||
buf[0] = (val >> 8) & 0xff;
|
||||
buf[1] = val & 0xff;
|
||||
}
|
||||
|
||||
static inline void storeUint32LE(uint8_t *buf, uint32_t val) {
|
||||
buf[0] = val & 0xff;
|
||||
buf[1] = (val >> 8) & 0xff;
|
||||
buf[2] = (val >> 16) & 0xff;
|
||||
buf[3] = (val >> 24) & 0xff;
|
||||
}
|
||||
|
||||
static inline void storeUint16LE(uint8_t *buf, uint16_t val) {
|
||||
buf[0] = val & 0xff;
|
||||
buf[1] = (val >> 8) & 0xff;
|
||||
}
|
||||
|
||||
static inline uint32_t srtVersion(int major, int minor, int patch) {
|
||||
return patch + minor * 0x100 + major * 0x10000;
|
||||
}
|
||||
static inline uint32_t genExpectedSeq(uint32_t seq) {
|
||||
return MAX_SEQ & seq;
|
||||
}
|
||||
|
||||
class UTicker {
|
||||
public:
|
||||
UTicker() { _created = _begin = SteadyClock::now(); }
|
||||
~UTicker() = default;
|
||||
|
||||
/**
|
||||
* 获取创建时间，单位微妙
|
||||
*/
|
||||
int64_t elapsedTime(TimePoint now) const { return DurationCountMicroseconds(now - _begin); }
|
||||
|
||||
/**
|
||||
* 获取上次resetTime后至今的时间，单位毫秒
|
||||
*/
|
||||
int64_t createdTime(TimePoint now) const { return DurationCountMicroseconds(now - _created); }
|
||||
|
||||
/**
|
||||
* 重置计时器
|
||||
*/
|
||||
void resetTime(TimePoint now) { _begin = now; }
|
||||
|
||||
private:
|
||||
TimePoint _begin;
|
||||
TimePoint _created;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_COMMON_H
|
||||
134
srt/HSExt.cpp
Normal file
134
srt/HSExt.cpp
Normal file
@ -0,0 +1,134 @@
|
||||
#include "HSExt.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
bool HSExtMessage::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (buf == NULL || len != HSEXT_MSG_SIZE) {
|
||||
return false;
|
||||
}
|
||||
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
extension_length = 3;
|
||||
HSExt::loadHeader();
|
||||
|
||||
assert(extension_type == SRT_CMD_HSREQ || extension_type == SRT_CMD_HSRSP);
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + 4;
|
||||
srt_version = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
srt_flag = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
recv_tsbpd_delay = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
|
||||
send_tsbpd_delay = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
std::string HSExtMessage::dump() {
|
||||
_StrPrinter printer;
|
||||
printer << "srt version : " << std::hex << srt_version << " srt flag : " << std::hex << srt_flag
|
||||
<< " recv_tsbpd_delay=" << recv_tsbpd_delay << " send_tsbpd_delay = " << send_tsbpd_delay;
|
||||
return std::move(printer);
|
||||
}
|
||||
|
||||
bool HSExtMessage::storeToData() {
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(HSEXT_MSG_SIZE);
|
||||
_data->setSize(HSEXT_MSG_SIZE);
|
||||
extension_length = 3;
|
||||
HSExt::storeHeader();
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + 4;
|
||||
|
||||
storeUint32(ptr, srt_version);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, srt_flag);
|
||||
ptr += 4;
|
||||
|
||||
storeUint16(ptr, recv_tsbpd_delay);
|
||||
ptr += 2;
|
||||
|
||||
storeUint16(ptr, send_tsbpd_delay);
|
||||
ptr += 2;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool HSExtStreamID::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (buf == NULL || len < 4) {
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
|
||||
HSExt::loadHeader();
|
||||
|
||||
size_t content_size = extension_length * 4;
|
||||
if (len < content_size + 4) {
|
||||
return false;
|
||||
}
|
||||
streamid.clear();
|
||||
char *ptr = _data->data() + 4;
|
||||
|
||||
for (size_t i = 0; i < extension_length; ++i) {
|
||||
streamid.push_back(*(ptr + 3));
|
||||
streamid.push_back(*(ptr + 2));
|
||||
streamid.push_back(*(ptr + 1));
|
||||
streamid.push_back(*(ptr));
|
||||
ptr += 4;
|
||||
}
|
||||
char zero = 0x00;
|
||||
if (streamid.back() == zero) {
|
||||
streamid.erase(streamid.find_first_of(zero), streamid.size());
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool HSExtStreamID::storeToData() {
|
||||
size_t content_size = ((streamid.length() + 4) + 3) / 4 * 4;
|
||||
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(content_size);
|
||||
_data->setSize(content_size);
|
||||
extension_length = (content_size - 4) / 4;
|
||||
extension_type = SRT_CMD_SID;
|
||||
HSExt::storeHeader();
|
||||
auto ptr = _data->data() + 4;
|
||||
memset(ptr, 0, extension_length * 4);
|
||||
const char *src = streamid.c_str();
|
||||
for (size_t i = 0; i < streamid.length() / 4; ++i) {
|
||||
*ptr = *(src + 3 + i * 4);
|
||||
ptr++;
|
||||
|
||||
*ptr = *(src + 2 + i * 4);
|
||||
ptr++;
|
||||
|
||||
*ptr = *(src + 1 + i * 4);
|
||||
ptr++;
|
||||
|
||||
*ptr = *(src + 0 + i * 4);
|
||||
ptr++;
|
||||
}
|
||||
|
||||
ptr += 3;
|
||||
size_t offset = streamid.length() / 4 * 4;
|
||||
for (size_t i = 0; i < streamid.length() % 4; ++i) {
|
||||
*ptr = *(src + offset + i);
|
||||
ptr -= 1;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
std::string HSExtStreamID::dump() {
|
||||
_StrPrinter printer;
|
||||
printer << " streamid : " << streamid;
|
||||
return std::move(printer);
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
129
srt/HSExt.hpp
Normal file
129
srt/HSExt.hpp
Normal file
@ -0,0 +1,129 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_HS_EXT_H
|
||||
#define ZLMEDIAKIT_SRT_HS_EXT_H
|
||||
|
||||
#include "Network/Buffer.h"
|
||||
|
||||
#include "Common.hpp"
|
||||
|
||||
namespace SRT {
|
||||
using namespace toolkit;
|
||||
class HSExt : public Buffer {
|
||||
public:
|
||||
HSExt() = default;
|
||||
virtual ~HSExt() = default;
|
||||
|
||||
enum {
|
||||
SRT_CMD_REJECT = 0,
|
||||
SRT_CMD_HSREQ = 1,
|
||||
SRT_CMD_HSRSP = 2,
|
||||
SRT_CMD_KMREQ = 3,
|
||||
SRT_CMD_KMRSP = 4,
|
||||
SRT_CMD_SID = 5,
|
||||
SRT_CMD_CONGESTION = 6,
|
||||
SRT_CMD_FILTER = 7,
|
||||
SRT_CMD_GROUP = 8,
|
||||
SRT_CMD_NONE = -1
|
||||
};
|
||||
|
||||
using Ptr = std::shared_ptr<HSExt>;
|
||||
uint16_t extension_type;
|
||||
uint16_t extension_length;
|
||||
virtual bool loadFromData(uint8_t *buf, size_t len) = 0;
|
||||
virtual bool storeToData() = 0;
|
||||
virtual std::string dump() = 0;
|
||||
///////Buffer override///////
|
||||
char *data() const override {
|
||||
if (_data) {
|
||||
return _data->data();
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
size_t size() const override {
|
||||
if (_data) {
|
||||
return _data->size();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
protected:
|
||||
void loadHeader() {
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
extension_type = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
extension_length = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
}
|
||||
void storeHeader() {
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
SRT::storeUint16(ptr, extension_type);
|
||||
ptr += 2;
|
||||
storeUint16(ptr, extension_length);
|
||||
}
|
||||
|
||||
protected:
|
||||
BufferRaw::Ptr _data;
|
||||
};
|
||||
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| SRT Version |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| SRT Flags |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Receiver TSBPD Delay | Sender TSBPD Delay |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 6: Handshake Extension Message structure
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-handshake-extension-message
|
||||
|
||||
*/
|
||||
class HSExtMessage : public HSExt {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<HSExtMessage>;
|
||||
enum {
|
||||
HS_EXT_MSG_TSBPDSND = 0x00000001,
|
||||
HS_EXT_MSG_TSBPDRCV = 0x00000002,
|
||||
HS_EXT_MSG_CRYPT = 0x00000004,
|
||||
HS_EXT_MSG_TLPKTDROP = 0x00000008,
|
||||
HS_EXT_MSG_PERIODICNAK = 0x00000010,
|
||||
HS_EXT_MSG_REXMITFLG = 0x00000020,
|
||||
HS_EXT_MSG_STREAM = 0x00000040,
|
||||
HS_EXT_MSG_PACKET_FILTER = 0x00000080
|
||||
};
|
||||
enum { HSEXT_MSG_SIZE = 16 };
|
||||
HSExtMessage() = default;
|
||||
~HSExtMessage() = default;
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
std::string dump() override;
|
||||
uint32_t srt_version;
|
||||
uint32_t srt_flag;
|
||||
uint16_t recv_tsbpd_delay;
|
||||
uint16_t send_tsbpd_delay;
|
||||
};
|
||||
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| |
|
||||
| Stream ID |
|
||||
...
|
||||
| |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 7: Stream ID Extension Message
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-stream-id-extension-message
|
||||
*/
|
||||
class HSExtStreamID : public HSExt {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<HSExtStreamID>;
|
||||
HSExtStreamID() = default;
|
||||
~HSExtStreamID() = default;
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
std::string dump() override;
|
||||
std::string streamid;
|
||||
};
|
||||
} // namespace SRT
|
||||
#endif // ZLMEDIAKIT_SRT_HS_EXT_H
|
||||
108
srt/NackContext.cpp
Normal file
108
srt/NackContext.cpp
Normal file
@ -0,0 +1,108 @@
|
||||
#include "NackContext.hpp"
|
||||
|
||||
namespace SRT {
|
||||
void NackContext::update(TimePoint now, std::list<PacketQueue::LostPair> &lostlist) {
|
||||
for (auto item : lostlist) {
|
||||
mergeItem(now, item);
|
||||
}
|
||||
}
|
||||
void NackContext::getLostList(
|
||||
TimePoint now, uint32_t rtt, uint32_t rtt_variance, std::list<PacketQueue::LostPair> &lostlist) {
|
||||
lostlist.clear();
|
||||
std::list<uint32_t> tmp_list;
|
||||
|
||||
for (auto it = _nack_map.begin(); it != _nack_map.end(); ++it) {
|
||||
if (!it->second._is_nack) {
|
||||
tmp_list.push_back(it->first);
|
||||
it->second._ts = now;
|
||||
it->second._is_nack = true;
|
||||
} else {
|
||||
if (DurationCountMicroseconds(now - it->second._ts) > rtt) {
|
||||
tmp_list.push_back(it->first);
|
||||
it->second._ts = now;
|
||||
}
|
||||
}
|
||||
}
|
||||
tmp_list.sort();
|
||||
|
||||
if (tmp_list.empty()) {
|
||||
return;
|
||||
}
|
||||
|
||||
uint32_t min = *tmp_list.begin();
|
||||
uint32_t max = *tmp_list.rbegin();
|
||||
|
||||
if ((max - min) >= (MAX_SEQ >> 1)) {
|
||||
while ((max - tmp_list.front()) > (MAX_SEQ >> 1)) {
|
||||
tmp_list.push_back(tmp_list.front());
|
||||
tmp_list.pop_front();
|
||||
}
|
||||
}
|
||||
|
||||
PacketQueue::LostPair lost;
|
||||
bool finish = true;
|
||||
for (auto cur = tmp_list.begin(); cur != tmp_list.end(); ++cur) {
|
||||
if (finish) {
|
||||
lost.first = *cur;
|
||||
lost.second = genExpectedSeq(*cur + 1);
|
||||
finish = false;
|
||||
} else {
|
||||
if (lost.second == *cur) {
|
||||
lost.second = genExpectedSeq(*cur + 1);
|
||||
} else {
|
||||
finish = true;
|
||||
lostlist.push_back(lost);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
void NackContext::drop(uint32_t seq) {
|
||||
if (_nack_map.empty())
|
||||
return;
|
||||
uint32_t min = _nack_map.begin()->first;
|
||||
uint32_t max = _nack_map.rbegin()->first;
|
||||
bool is_cycle = false;
|
||||
if ((max - min) >= (MAX_SEQ >> 1)) {
|
||||
is_cycle = true;
|
||||
}
|
||||
|
||||
for (auto it = _nack_map.begin(); it != _nack_map.end();) {
|
||||
if (!is_cycle) {
|
||||
// 不回环
|
||||
if (it->first <= seq) {
|
||||
it = _nack_map.erase(it);
|
||||
} else {
|
||||
it++;
|
||||
}
|
||||
} else {
|
||||
if (it->first <= seq) {
|
||||
if ((seq - it->first) >= (MAX_SEQ >> 1)) {
|
||||
WarnL << "cycle seq " << seq << " " << it->first;
|
||||
it++;
|
||||
} else {
|
||||
it = _nack_map.erase(it);
|
||||
}
|
||||
} else {
|
||||
if ((it->first - seq) >= (MAX_SEQ >> 1)) {
|
||||
it = _nack_map.erase(it);
|
||||
WarnL << "cycle seq " << seq << " " << it->first;
|
||||
} else {
|
||||
it++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void NackContext::mergeItem(TimePoint now, PacketQueue::LostPair &item) {
|
||||
for (uint32_t i = item.first; i < item.second; ++i) {
|
||||
auto it = _nack_map.find(i);
|
||||
if (it != _nack_map.end()) {
|
||||
} else {
|
||||
NackItem tmp;
|
||||
tmp._is_nack = false;
|
||||
_nack_map.emplace(i, tmp);
|
||||
}
|
||||
}
|
||||
}
|
||||
} // namespace SRT
|
||||
30
srt/NackContext.hpp
Normal file
30
srt/NackContext.hpp
Normal file
@ -0,0 +1,30 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_NACK_CONTEXT_H
|
||||
#define ZLMEDIAKIT_SRT_NACK_CONTEXT_H
|
||||
#include "Common.hpp"
|
||||
#include "PacketQueue.hpp"
|
||||
#include <list>
|
||||
|
||||
namespace SRT {
|
||||
class NackContext {
|
||||
public:
|
||||
NackContext() = default;
|
||||
~NackContext() = default;
|
||||
void update(TimePoint now, std::list<PacketQueue::LostPair> &lostlist);
|
||||
void getLostList(TimePoint now, uint32_t rtt, uint32_t rtt_variance, std::list<PacketQueue::LostPair> &lostlist);
|
||||
void drop(uint32_t seq);
|
||||
|
||||
private:
|
||||
void mergeItem(TimePoint now, PacketQueue::LostPair &item);
|
||||
|
||||
private:
|
||||
class NackItem {
|
||||
public:
|
||||
bool _is_nack = false;
|
||||
TimePoint _ts; // send nak time
|
||||
};
|
||||
|
||||
std::map<uint32_t, NackItem> _nack_map;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
#endif // ZLMEDIAKIT_SRT_NACK_CONTEXT_H
|
||||
603
srt/Packet.cpp
Normal file
603
srt/Packet.cpp
Normal file
@ -0,0 +1,603 @@
|
||||
#include "Util/MD5.h"
|
||||
#include "Util/logger.h"
|
||||
#include <atomic>
|
||||
|
||||
#include "Packet.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
const size_t DataPacket::HEADER_SIZE;
|
||||
const size_t ControlPacket::HEADER_SIZE;
|
||||
const size_t HandshakePacket::HS_CONTENT_MIN_SIZE;
|
||||
|
||||
bool DataPacket::isDataPacket(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
if (!(buf[0] & 0x80)) {
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
uint32_t DataPacket::getSocketID(uint8_t *buf, size_t len) {
|
||||
uint8_t *ptr = buf;
|
||||
ptr += 12;
|
||||
return loadUint32(ptr);
|
||||
}
|
||||
|
||||
bool DataPacket::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
uint8_t *ptr = buf;
|
||||
f = ptr[0] >> 7;
|
||||
packet_seq_number = loadUint32(ptr) & 0x7fffffff;
|
||||
ptr += 4;
|
||||
|
||||
PP = ptr[0] >> 6;
|
||||
O = (ptr[0] & 0x20) >> 5;
|
||||
KK = (ptr[0] & 0x18) >> 3;
|
||||
R = (ptr[0] & 0x04) >> 2;
|
||||
msg_number = (ptr[0] & 0x03) << 24 | ptr[1] << 12 | ptr[2] << 8 | ptr[3];
|
||||
ptr += 4;
|
||||
|
||||
timestamp = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
dst_socket_id = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)(buf), len);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool DataPacket::storeToHeader() {
|
||||
if (!_data || _data->size() < HEADER_SIZE) {
|
||||
WarnL << "data size less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
|
||||
ptr[0] = packet_seq_number >> 24;
|
||||
ptr[1] = (packet_seq_number >> 16) & 0xff;
|
||||
ptr[2] = (packet_seq_number >> 8) & 0xff;
|
||||
ptr[3] = packet_seq_number & 0xff;
|
||||
ptr += 4;
|
||||
|
||||
ptr[0] = PP << 6;
|
||||
ptr[0] |= O << 5;
|
||||
ptr[0] |= KK << 3;
|
||||
ptr[0] |= R << 2;
|
||||
ptr[0] |= (msg_number & 0xff000000) >> 24;
|
||||
ptr[1] = (msg_number & 0xff0000) >> 16;
|
||||
ptr[2] = (msg_number & 0xff00) >> 8;
|
||||
ptr[3] = msg_number & 0xff;
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, timestamp);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, dst_socket_id);
|
||||
ptr += 4;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool DataPacket::storeToData(uint8_t *buf, size_t len) {
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(len + HEADER_SIZE);
|
||||
_data->setSize(len + HEADER_SIZE);
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
|
||||
ptr[0] = packet_seq_number >> 24;
|
||||
ptr[1] = (packet_seq_number >> 16) & 0xff;
|
||||
ptr[2] = (packet_seq_number >> 8) & 0xff;
|
||||
ptr[3] = packet_seq_number & 0xff;
|
||||
ptr += 4;
|
||||
|
||||
ptr[0] = PP << 6;
|
||||
ptr[0] |= O << 5;
|
||||
ptr[0] |= KK << 3;
|
||||
ptr[0] |= R << 2;
|
||||
ptr[0] |= (msg_number & 0xff000000) >> 24;
|
||||
ptr[1] = (msg_number & 0xff0000) >> 16;
|
||||
ptr[2] = (msg_number & 0xff00) >> 8;
|
||||
ptr[3] = msg_number & 0xff;
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, timestamp);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, dst_socket_id);
|
||||
ptr += 4;
|
||||
|
||||
memcpy(ptr, buf, len);
|
||||
return true;
|
||||
}
|
||||
|
||||
char *DataPacket::data() const {
|
||||
if (!_data)
|
||||
return nullptr;
|
||||
return _data->data();
|
||||
}
|
||||
|
||||
size_t DataPacket::size() const {
|
||||
if (!_data) {
|
||||
return 0;
|
||||
}
|
||||
return _data->size();
|
||||
}
|
||||
|
||||
char *DataPacket::payloadData() {
|
||||
if (!_data)
|
||||
return nullptr;
|
||||
return _data->data() + HEADER_SIZE;
|
||||
}
|
||||
|
||||
size_t DataPacket::payloadSize() {
|
||||
if (!_data) {
|
||||
return 0;
|
||||
}
|
||||
return _data->size() - HEADER_SIZE;
|
||||
}
|
||||
|
||||
bool ControlPacket::isControlPacket(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
if (buf[0] & 0x80) {
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
uint16_t ControlPacket::getControlType(uint8_t *buf, size_t len) {
|
||||
uint8_t *ptr = buf;
|
||||
uint16_t control_type = (ptr[0] & 0x7f) << 8 | ptr[1];
|
||||
return control_type;
|
||||
}
|
||||
|
||||
bool ControlPacket::loadHeader() {
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
f = ptr[0] >> 7;
|
||||
control_type = (ptr[0] & 0x7f) << 8 | ptr[1];
|
||||
ptr += 2;
|
||||
|
||||
sub_type = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
|
||||
type_specific_info[0] = ptr[0];
|
||||
type_specific_info[1] = ptr[1];
|
||||
type_specific_info[2] = ptr[2];
|
||||
type_specific_info[3] = ptr[3];
|
||||
ptr += 4;
|
||||
|
||||
timestamp = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
dst_socket_id = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ControlPacket::storeToHeader() {
|
||||
uint8_t *ptr = (uint8_t *)_data->data();
|
||||
ptr[0] = 0x80;
|
||||
ptr[0] |= control_type >> 8;
|
||||
ptr[1] = control_type & 0xff;
|
||||
ptr += 2;
|
||||
|
||||
storeUint16(ptr, sub_type);
|
||||
ptr += 2;
|
||||
|
||||
ptr[0] = type_specific_info[0];
|
||||
ptr[1] = type_specific_info[1];
|
||||
ptr[2] = type_specific_info[2];
|
||||
ptr[3] = type_specific_info[3];
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, timestamp);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, dst_socket_id);
|
||||
ptr += 4;
|
||||
return true;
|
||||
}
|
||||
|
||||
char *ControlPacket::data() const {
|
||||
if (!_data)
|
||||
return nullptr;
|
||||
return _data->data();
|
||||
}
|
||||
|
||||
size_t ControlPacket::size() const {
|
||||
if (!_data) {
|
||||
return 0;
|
||||
}
|
||||
return _data->size();
|
||||
}
|
||||
|
||||
uint32_t ControlPacket::getSocketID(uint8_t *buf, size_t len) {
|
||||
return loadUint32(buf + 12);
|
||||
}
|
||||
|
||||
bool HandshakePacket::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (HEADER_SIZE + HS_CONTENT_MIN_SIZE > len) {
|
||||
ErrorL << "size too smalle " << encryption_field;
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)(buf), len);
|
||||
ControlPacket::loadHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
// parse CIF
|
||||
version = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
encryption_field = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
|
||||
extension_field = loadUint16(ptr);
|
||||
ptr += 2;
|
||||
|
||||
initial_packet_sequence_number = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
mtu = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
max_flow_window_size = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
handshake_type = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
srt_socket_id = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
syn_cookie = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
memcpy(peer_ip_addr, ptr, sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]));
|
||||
ptr += sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]);
|
||||
|
||||
if (encryption_field != NO_ENCRYPTION) {
|
||||
ErrorL << "not support encryption " << encryption_field;
|
||||
}
|
||||
|
||||
if (extension_field == 0) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (len == HEADER_SIZE + HS_CONTENT_MIN_SIZE) {
|
||||
// ErrorL << "extension filed not exist " << extension_field;
|
||||
return true;
|
||||
}
|
||||
|
||||
return loadExtMessage(ptr, len - HS_CONTENT_MIN_SIZE - HEADER_SIZE);
|
||||
}
|
||||
|
||||
bool HandshakePacket::loadExtMessage(uint8_t *buf, size_t len) {
|
||||
uint8_t *ptr = buf;
|
||||
ext_list.clear();
|
||||
uint16_t type;
|
||||
uint16_t length;
|
||||
HSExt::Ptr ext;
|
||||
while (ptr < buf + len) {
|
||||
type = loadUint16(ptr);
|
||||
length = loadUint16(ptr + 2);
|
||||
switch (type) {
|
||||
case HSExt::SRT_CMD_HSREQ:
|
||||
case HSExt::SRT_CMD_HSRSP:
|
||||
ext = std::make_shared<HSExtMessage>();
|
||||
break;
|
||||
case HSExt::SRT_CMD_SID:
|
||||
ext = std::make_shared<HSExtStreamID>();
|
||||
break;
|
||||
default:
|
||||
WarnL << "not support ext " << type;
|
||||
break;
|
||||
}
|
||||
if (ext) {
|
||||
if (ext->loadFromData(ptr, length * 4 + 4)) {
|
||||
ext_list.push_back(std::move(ext));
|
||||
} else {
|
||||
WarnL << "parse HS EXT failed type=" << type << " len=" << length;
|
||||
}
|
||||
ext = nullptr;
|
||||
}
|
||||
|
||||
ptr += length * 4 + 4;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool HandshakePacket::storeExtMessage() {
|
||||
uint8_t *buf = (uint8_t *)_data->data() + HEADER_SIZE + 48;
|
||||
size_t len = _data->size() - HEADER_SIZE - 48;
|
||||
for (auto ex : ext_list) {
|
||||
memcpy(buf, ex->data(), ex->size());
|
||||
buf += ex->size();
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
size_t HandshakePacket::getExtSize() {
|
||||
size_t size = 0;
|
||||
for (auto it : ext_list) {
|
||||
size += it->size();
|
||||
}
|
||||
return size;
|
||||
}
|
||||
bool HandshakePacket::storeToData() {
|
||||
_data = BufferRaw::create();
|
||||
for (auto ex : ext_list) {
|
||||
ex->storeToData();
|
||||
}
|
||||
auto ext_size = getExtSize();
|
||||
_data->setCapacity(HEADER_SIZE + 48 + ext_size);
|
||||
_data->setSize(HEADER_SIZE + 48 + ext_size);
|
||||
|
||||
control_type = ControlPacket::HANDSHAKE;
|
||||
sub_type = 0;
|
||||
|
||||
ControlPacket::storeToHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
|
||||
storeUint32(ptr, version);
|
||||
ptr += 4;
|
||||
|
||||
storeUint16(ptr, encryption_field);
|
||||
ptr += 2;
|
||||
|
||||
storeUint16(ptr, extension_field);
|
||||
ptr += 2;
|
||||
|
||||
storeUint32(ptr, initial_packet_sequence_number);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, mtu);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, max_flow_window_size);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, handshake_type);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, srt_socket_id);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, syn_cookie);
|
||||
ptr += 4;
|
||||
|
||||
memcpy(ptr, peer_ip_addr, sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]));
|
||||
ptr += sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]);
|
||||
|
||||
if (encryption_field != NO_ENCRYPTION) {
|
||||
ErrorL << "not support encryption " << encryption_field;
|
||||
}
|
||||
|
||||
assert(encryption_field == NO_ENCRYPTION);
|
||||
|
||||
return storeExtMessage();
|
||||
}
|
||||
|
||||
bool HandshakePacket::isHandshakePacket(uint8_t *buf, size_t len) {
|
||||
if (!ControlPacket::isControlPacket(buf, len)) {
|
||||
return false;
|
||||
}
|
||||
if (len < HEADER_SIZE + 48) {
|
||||
return false;
|
||||
}
|
||||
return ControlPacket::getControlType(buf, len) == HANDSHAKE;
|
||||
}
|
||||
|
||||
uint32_t HandshakePacket::getHandshakeType(uint8_t *buf, size_t len) {
|
||||
uint8_t *ptr = buf + HEADER_SIZE + 5 * 4;
|
||||
return loadUint32(ptr);
|
||||
}
|
||||
|
||||
uint32_t HandshakePacket::getSynCookie(uint8_t *buf, size_t len) {
|
||||
uint8_t *ptr = buf + HEADER_SIZE + 7 * 4;
|
||||
return loadUint32(ptr);
|
||||
}
|
||||
|
||||
void HandshakePacket::assignPeerIP(struct sockaddr_storage *addr) {
|
||||
memset(peer_ip_addr, 0, sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]));
|
||||
if (addr->ss_family == AF_INET) {
|
||||
struct sockaddr_in *ipv4 = (struct sockaddr_in *)addr;
|
||||
// 抓包 奇怪好像是小头端？？？
|
||||
storeUint32LE(peer_ip_addr, ipv4->sin_addr.s_addr);
|
||||
} else if (addr->ss_family == AF_INET6) {
|
||||
if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr)) {
|
||||
struct in_addr addr4;
|
||||
memcpy(&addr4, 12 + (char *)&(((struct sockaddr_in6 *)addr)->sin6_addr), 4);
|
||||
storeUint32LE(peer_ip_addr, addr4.s_addr);
|
||||
} else {
|
||||
const sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)addr;
|
||||
memcpy(peer_ip_addr, ipv6->sin6_addr.s6_addr, sizeof(peer_ip_addr) * sizeof(peer_ip_addr[0]));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
uint32_t HandshakePacket::generateSynCookie(
|
||||
struct sockaddr_storage *addr, TimePoint ts, uint32_t current_cookie, int correction) {
|
||||
static std::atomic<uint32_t> distractor { 0 };
|
||||
uint32_t rollover = distractor.load() + 10;
|
||||
|
||||
while (true) {
|
||||
// SYN cookie
|
||||
char clienthost[NI_MAXHOST];
|
||||
char clientport[NI_MAXSERV];
|
||||
getnameinfo(
|
||||
(struct sockaddr *)addr, sizeof(struct sockaddr_storage), clienthost, sizeof(clienthost), clientport,
|
||||
sizeof(clientport), NI_NUMERICHOST | NI_NUMERICSERV);
|
||||
int64_t timestamp = (DurationCountMicroseconds(SteadyClock::now() - ts) / 60000000) + distractor.load()
|
||||
+ correction; // secret changes every one minute
|
||||
std::stringstream cookiestr;
|
||||
cookiestr << clienthost << ":" << clientport << ":" << timestamp;
|
||||
union {
|
||||
unsigned char cookie[16];
|
||||
uint32_t cookie_val;
|
||||
};
|
||||
MD5 md5(cookiestr.str());
|
||||
memcpy(cookie, md5.rawdigest().c_str(), 16);
|
||||
|
||||
if (cookie_val != current_cookie) {
|
||||
return cookie_val;
|
||||
}
|
||||
|
||||
++distractor;
|
||||
|
||||
// This is just to make the loop formally breakable,
|
||||
// but this is virtually impossible to happen.
|
||||
if (distractor == rollover) {
|
||||
return cookie_val;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool KeepLivePacket::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
|
||||
return loadHeader();
|
||||
}
|
||||
bool KeepLivePacket::storeToData() {
|
||||
control_type = ControlPacket::KEEPALIVE;
|
||||
sub_type = 0;
|
||||
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(HEADER_SIZE);
|
||||
_data->setSize(HEADER_SIZE);
|
||||
return storeToHeader();
|
||||
}
|
||||
|
||||
bool NAKPacket::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
loadHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
uint8_t *end = (uint8_t *)_data->data() + _data->size();
|
||||
LostPair lost;
|
||||
while (ptr < end) {
|
||||
if ((*ptr) & 0x80) {
|
||||
lost.first = loadUint32(ptr) & 0x7fffffff;
|
||||
lost.second = loadUint32(ptr + 4) & 0x7fffffff;
|
||||
lost.second += 1;
|
||||
ptr += 8;
|
||||
} else {
|
||||
lost.first = loadUint32(ptr);
|
||||
lost.second = lost.first + 1;
|
||||
ptr += 4;
|
||||
}
|
||||
lost_list.push_back(lost);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
bool NAKPacket::storeToData() {
|
||||
control_type = NAK;
|
||||
sub_type = 0;
|
||||
size_t cif_size = getCIFSize();
|
||||
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(HEADER_SIZE + cif_size);
|
||||
_data->setSize(HEADER_SIZE + cif_size);
|
||||
|
||||
storeToHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
|
||||
for (auto it : lost_list) {
|
||||
if (it.first + 1 == it.second) {
|
||||
storeUint32(ptr, it.first);
|
||||
ptr[0] = ptr[0] & 0x7f;
|
||||
ptr += 4;
|
||||
} else {
|
||||
storeUint32(ptr, it.first);
|
||||
ptr[0] |= 0x80;
|
||||
|
||||
storeUint32(ptr + 4, it.second - 1);
|
||||
// ptr[4] = ptr[4]&0x7f;
|
||||
|
||||
ptr += 8;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
size_t NAKPacket::getCIFSize() {
|
||||
size_t size = 0;
|
||||
for (auto it : lost_list) {
|
||||
if (it.first + 1 == it.second) {
|
||||
size += 4;
|
||||
} else {
|
||||
size += 8;
|
||||
}
|
||||
}
|
||||
return size;
|
||||
}
|
||||
|
||||
std::string NAKPacket::dump() {
|
||||
_StrPrinter printer;
|
||||
for (auto it : lost_list) {
|
||||
printer << "[ " << it.first << " , " << it.second - 1 << " ]";
|
||||
}
|
||||
return std::move(printer);
|
||||
}
|
||||
|
||||
bool MsgDropReqPacket::loadFromData(uint8_t *buf, size_t len) {
|
||||
if (len < HEADER_SIZE + 8) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
loadHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
|
||||
first_pkt_seq_num = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
|
||||
last_pkt_seq_num = loadUint32(ptr);
|
||||
ptr += 4;
|
||||
return true;
|
||||
}
|
||||
bool MsgDropReqPacket::storeToData() {
|
||||
control_type = DROPREQ;
|
||||
sub_type = 0;
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(HEADER_SIZE + 8);
|
||||
_data->setSize(HEADER_SIZE + 8);
|
||||
|
||||
storeToHeader();
|
||||
|
||||
uint8_t *ptr = (uint8_t *)_data->data() + HEADER_SIZE;
|
||||
|
||||
storeUint32(ptr, first_pkt_seq_num);
|
||||
ptr += 4;
|
||||
|
||||
storeUint32(ptr, last_pkt_seq_num);
|
||||
ptr += 4;
|
||||
return true;
|
||||
}
|
||||
} // namespace SRT
|
||||
360
srt/Packet.hpp
Normal file
360
srt/Packet.hpp
Normal file
@ -0,0 +1,360 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_PACKET_H
|
||||
#define ZLMEDIAKIT_SRT_PACKET_H
|
||||
|
||||
#include <stdint.h>
|
||||
#include <vector>
|
||||
|
||||
#include "Network/Buffer.h"
|
||||
#include "Network/sockutil.h"
|
||||
#include "Util/logger.h"
|
||||
|
||||
#include "Common.hpp"
|
||||
#include "HSExt.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
using namespace toolkit;
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|0| Packet Sequence Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|P P|O|K K|R| Message Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| |
|
||||
+ Data +
|
||||
| |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 3: Data packet structure
|
||||
reference https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-packet-structure
|
||||
*/
|
||||
class DataPacket : public Buffer {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<DataPacket>;
|
||||
DataPacket() = default;
|
||||
~DataPacket() = default;
|
||||
|
||||
static const size_t HEADER_SIZE = 16;
|
||||
static bool isDataPacket(uint8_t *buf, size_t len);
|
||||
static uint32_t getSocketID(uint8_t *buf, size_t len);
|
||||
bool loadFromData(uint8_t *buf, size_t len);
|
||||
bool storeToData(uint8_t *buf, size_t len);
|
||||
bool storeToHeader();
|
||||
|
||||
///////Buffer override///////
|
||||
char *data() const override;
|
||||
size_t size() const override;
|
||||
|
||||
char *payloadData();
|
||||
size_t payloadSize();
|
||||
|
||||
uint8_t f;
|
||||
uint32_t packet_seq_number;
|
||||
uint8_t PP;
|
||||
uint8_t O;
|
||||
uint8_t KK;
|
||||
uint8_t R;
|
||||
uint32_t msg_number;
|
||||
uint32_t timestamp;
|
||||
uint32_t dst_socket_id;
|
||||
|
||||
private:
|
||||
BufferRaw::Ptr _data;
|
||||
};
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Control Type | Subtype |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Type-specific Information |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- CIF -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| |
|
||||
+ Control Information Field +
|
||||
| |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 4: Control packet structure
|
||||
reference https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-control-packets
|
||||
*/
|
||||
class ControlPacket : public Buffer {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<ControlPacket>;
|
||||
static const size_t HEADER_SIZE = 16;
|
||||
static bool isControlPacket(uint8_t *buf, size_t len);
|
||||
static uint16_t getControlType(uint8_t *buf, size_t len);
|
||||
static uint32_t getSocketID(uint8_t *buf, size_t len);
|
||||
|
||||
ControlPacket() = default;
|
||||
virtual ~ControlPacket() = default;
|
||||
virtual bool loadFromData(uint8_t *buf, size_t len) = 0;
|
||||
virtual bool storeToData() = 0;
|
||||
|
||||
bool loadHeader();
|
||||
bool storeToHeader();
|
||||
|
||||
///////Buffer override///////
|
||||
char *data() const override;
|
||||
size_t size() const override;
|
||||
|
||||
enum {
|
||||
HANDSHAKE = 0x0000,
|
||||
KEEPALIVE = 0x0001,
|
||||
ACK = 0x0002,
|
||||
NAK = 0x0003,
|
||||
CONGESTIONWARNING = 0x0004,
|
||||
SHUTDOWN = 0x0005,
|
||||
ACKACK = 0x0006,
|
||||
DROPREQ = 0x0007,
|
||||
PEERERROR = 0x0008,
|
||||
USERDEFINEDTYPE = 0x7FFF
|
||||
};
|
||||
|
||||
uint32_t sub_type : 16;
|
||||
uint32_t control_type : 15;
|
||||
uint32_t f : 1;
|
||||
uint8_t type_specific_info[4];
|
||||
uint32_t timestamp;
|
||||
uint32_t dst_socket_id;
|
||||
|
||||
protected:
|
||||
BufferRaw::Ptr _data;
|
||||
};
|
||||
|
||||
/**
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Version |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Encryption Field | Extension Field |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Initial Packet Sequence Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Maximum Transmission Unit Size |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Maximum Flow Window Size |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Handshake Type |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| SRT Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| SYN Cookie |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| |
|
||||
+ +
|
||||
| |
|
||||
+ Peer IP Address +
|
||||
| |
|
||||
+ +
|
||||
| |
|
||||
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
|
||||
| Extension Type | Extension Length |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| |
|
||||
+ Extension Contents +
|
||||
| |
|
||||
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
|
||||
Figure 5: Handshake packet structure
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-handshake
|
||||
*/
|
||||
class HandshakePacket : public ControlPacket {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<HandshakePacket>;
|
||||
enum { NO_ENCRYPTION = 0, AES_128 = 1, AES_196 = 2, AES_256 = 3 };
|
||||
static const size_t HS_CONTENT_MIN_SIZE = 48;
|
||||
enum {
|
||||
HS_TYPE_DONE = 0xFFFFFFFD,
|
||||
HS_TYPE_AGREEMENT = 0xFFFFFFFE,
|
||||
HS_TYPE_CONCLUSION = 0xFFFFFFFF,
|
||||
HS_TYPE_WAVEHAND = 0x00000000,
|
||||
HS_TYPE_INDUCTION = 0x00000001
|
||||
};
|
||||
|
||||
enum { HS_EXT_FILED_HSREQ = 0x00000001, HS_EXT_FILED_KMREQ = 0x00000002, HS_EXT_FILED_CONFIG = 0x00000004 };
|
||||
|
||||
HandshakePacket() = default;
|
||||
~HandshakePacket() = default;
|
||||
|
||||
static bool isHandshakePacket(uint8_t *buf, size_t len);
|
||||
static uint32_t getHandshakeType(uint8_t *buf, size_t len);
|
||||
static uint32_t getSynCookie(uint8_t *buf, size_t len);
|
||||
static uint32_t
|
||||
generateSynCookie(struct sockaddr_storage *addr, TimePoint ts, uint32_t current_cookie = 0, int correction = 0);
|
||||
|
||||
void assignPeerIP(struct sockaddr_storage *addr);
|
||||
///////ControlPacket override///////
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
|
||||
uint32_t version;
|
||||
uint16_t encryption_field;
|
||||
uint16_t extension_field;
|
||||
uint32_t initial_packet_sequence_number;
|
||||
uint32_t mtu;
|
||||
uint32_t max_flow_window_size;
|
||||
uint32_t handshake_type;
|
||||
uint32_t srt_socket_id;
|
||||
uint32_t syn_cookie;
|
||||
uint8_t peer_ip_addr[16];
|
||||
|
||||
std::vector<HSExt::Ptr> ext_list;
|
||||
|
||||
private:
|
||||
bool loadExtMessage(uint8_t *buf, size_t len);
|
||||
bool storeExtMessage();
|
||||
size_t getExtSize();
|
||||
};
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Control Type | Reserved |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Type-specific Information |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 12: Keep-Alive control packet
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-keep-alive
|
||||
*/
|
||||
class KeepLivePacket : public ControlPacket {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<KeepLivePacket>;
|
||||
KeepLivePacket() = default;
|
||||
~KeepLivePacket() = default;
|
||||
///////ControlPacket override///////
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
};
|
||||
|
||||
/*
|
||||
An SRT NAK packet is formatted as follows:
|
||||
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Control Type | Reserved |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Type-specific Information |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+- CIF (Loss List) -+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|0| Lost packet sequence number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Range of lost packets from sequence number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|0| Up to sequence number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|0| Lost packet sequence number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 14: NAK control packet
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-nak-control-packet
|
||||
*/
|
||||
class NAKPacket : public ControlPacket {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<NAKPacket>;
|
||||
using LostPair = std::pair<uint32_t, uint32_t>;
|
||||
NAKPacket() = default;
|
||||
~NAKPacket() = default;
|
||||
std::string dump();
|
||||
///////ControlPacket override///////
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
|
||||
std::list<LostPair> lost_list;
|
||||
|
||||
private:
|
||||
size_t getCIFSize();
|
||||
};
|
||||
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Control Type = 7 | Reserved = 0 |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Message Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| First Packet Sequence Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Last Packet Sequence Number |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 18: Drop Request control packet
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-message-drop-request
|
||||
*/
|
||||
class MsgDropReqPacket : public ControlPacket {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<MsgDropReqPacket>;
|
||||
MsgDropReqPacket() = default;
|
||||
~MsgDropReqPacket() = default;
|
||||
///////ControlPacket override///////
|
||||
bool loadFromData(uint8_t *buf, size_t len) override;
|
||||
bool storeToData() override;
|
||||
|
||||
uint32_t first_pkt_seq_num;
|
||||
uint32_t last_pkt_seq_num;
|
||||
};
|
||||
|
||||
/*
|
||||
0 1 2 3
|
||||
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+- SRT Header +-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
|1| Control Type | Reserved |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Type-specific Information |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Timestamp |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Destination Socket ID |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
Figure 16: Shutdown control packet
|
||||
https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html#name-shutdown
|
||||
|
||||
*/
|
||||
class ShutDownPacket : public ControlPacket {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<ShutDownPacket>;
|
||||
ShutDownPacket() = default;
|
||||
~ShutDownPacket() = default;
|
||||
|
||||
///////ControlPacket override///////
|
||||
bool loadFromData(uint8_t *buf, size_t len) override {
|
||||
if (len < HEADER_SIZE) {
|
||||
WarnL << "data size" << len << " less " << HEADER_SIZE;
|
||||
return false;
|
||||
}
|
||||
_data = BufferRaw::create();
|
||||
_data->assign((char *)buf, len);
|
||||
|
||||
return loadHeader();
|
||||
}
|
||||
bool storeToData() override {
|
||||
control_type = ControlPacket::SHUTDOWN;
|
||||
sub_type = 0;
|
||||
_data = BufferRaw::create();
|
||||
_data->setCapacity(HEADER_SIZE);
|
||||
_data->setSize(HEADER_SIZE);
|
||||
return storeToHeader();
|
||||
}
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_PACKET_H
|
||||
223
srt/PacketQueue.cpp
Normal file
223
srt/PacketQueue.cpp
Normal file
@ -0,0 +1,223 @@
|
||||
#include "PacketQueue.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
static inline bool isSeqEdge(uint32_t seq, uint32_t cap) {
|
||||
if (seq > (MAX_SEQ - cap)) {
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline bool isTSCycle(uint32_t first, uint32_t second) {
|
||||
uint32_t diff;
|
||||
if (first > second) {
|
||||
diff = first - second;
|
||||
} else {
|
||||
diff = second - first;
|
||||
}
|
||||
|
||||
if (diff > (MAX_TS >> 1)) {
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
PacketQueue::PacketQueue(uint32_t max_size, uint32_t init_seq, uint32_t latency)
|
||||
: _pkt_cap(max_size)
|
||||
, _pkt_latency(latency)
|
||||
, _pkt_expected_seq(init_seq) {}
|
||||
|
||||
void PacketQueue::tryInsertPkt(DataPacket::Ptr pkt) {
|
||||
if (_pkt_expected_seq <= pkt->packet_seq_number) {
|
||||
auto diff = pkt->packet_seq_number - _pkt_expected_seq;
|
||||
if (diff >= (MAX_SEQ >> 1)) {
|
||||
TraceL << "drop packet too later for cycle "
|
||||
<< "expected seq=" << _pkt_expected_seq << " pkt seq=" << pkt->packet_seq_number;
|
||||
return;
|
||||
} else {
|
||||
_pkt_map.emplace(pkt->packet_seq_number, pkt);
|
||||
}
|
||||
} else {
|
||||
auto diff = _pkt_expected_seq - pkt->packet_seq_number;
|
||||
if (diff >= (MAX_SEQ >> 1)) {
|
||||
_pkt_map.emplace(pkt->packet_seq_number, pkt);
|
||||
TraceL << " cycle packet "
|
||||
<< "expected seq=" << _pkt_expected_seq << " pkt seq=" << pkt->packet_seq_number;
|
||||
} else {
|
||||
// TraceL << "drop packet too later "<< "expected seq=" << _pkt_expected_seq << " pkt seq=" <<
|
||||
// pkt->packet_seq_number;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool PacketQueue::inputPacket(DataPacket::Ptr pkt, std::list<DataPacket::Ptr> &out) {
|
||||
tryInsertPkt(pkt);
|
||||
auto it = _pkt_map.find(_pkt_expected_seq);
|
||||
while (it != _pkt_map.end()) {
|
||||
out.push_back(it->second);
|
||||
_pkt_map.erase(it);
|
||||
_pkt_expected_seq = genExpectedSeq(_pkt_expected_seq + 1);
|
||||
it = _pkt_map.find(_pkt_expected_seq);
|
||||
}
|
||||
|
||||
while (_pkt_map.size() > _pkt_cap) {
|
||||
// 防止回环
|
||||
it = _pkt_map.find(_pkt_expected_seq);
|
||||
if (it != _pkt_map.end()) {
|
||||
out.push_back(it->second);
|
||||
_pkt_map.erase(it);
|
||||
}
|
||||
_pkt_expected_seq = genExpectedSeq(_pkt_expected_seq + 1);
|
||||
}
|
||||
|
||||
while (timeLatency() > _pkt_latency) {
|
||||
it = _pkt_map.find(_pkt_expected_seq);
|
||||
if (it != _pkt_map.end()) {
|
||||
out.push_back(it->second);
|
||||
_pkt_map.erase(it);
|
||||
}
|
||||
_pkt_expected_seq = genExpectedSeq(_pkt_expected_seq + 1);
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool PacketQueue::drop(uint32_t first, uint32_t last, std::list<DataPacket::Ptr> &out) {
|
||||
uint32_t end = genExpectedSeq(last + 1);
|
||||
decltype(_pkt_map.end()) it;
|
||||
for (uint32_t i = _pkt_expected_seq; i < end;) {
|
||||
it = _pkt_map.find(i);
|
||||
if (it != _pkt_map.end()) {
|
||||
out.push_back(it->second);
|
||||
_pkt_map.erase(it);
|
||||
}
|
||||
i = genExpectedSeq(i + 1);
|
||||
}
|
||||
_pkt_expected_seq = end;
|
||||
return true;
|
||||
}
|
||||
|
||||
uint32_t PacketQueue::timeLatency() {
|
||||
if (_pkt_map.empty()) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
auto first = _pkt_map.begin()->second->timestamp;
|
||||
auto last = _pkt_map.rbegin()->second->timestamp;
|
||||
uint32_t dur;
|
||||
if (last > first) {
|
||||
dur = last - first;
|
||||
} else {
|
||||
dur = first - last;
|
||||
}
|
||||
|
||||
if (dur > 0x80000000) {
|
||||
dur = MAX_TS - dur;
|
||||
WarnL << "cycle dur " << dur;
|
||||
}
|
||||
|
||||
return dur;
|
||||
}
|
||||
|
||||
std::list<PacketQueue::LostPair> PacketQueue::getLostSeq() {
|
||||
std::list<PacketQueue::LostPair> re;
|
||||
if (_pkt_map.empty()) {
|
||||
return re;
|
||||
}
|
||||
|
||||
if (getExpectedSize() == getSize()) {
|
||||
return re;
|
||||
}
|
||||
|
||||
uint32_t end = 0;
|
||||
uint32_t first, last;
|
||||
|
||||
first = _pkt_map.begin()->second->packet_seq_number;
|
||||
last = _pkt_map.rbegin()->second->packet_seq_number;
|
||||
if ((last - first) > (MAX_SEQ >> 1)) {
|
||||
TraceL << " cycle seq first " << first << " last " << last << " size " << _pkt_map.size();
|
||||
end = first;
|
||||
} else {
|
||||
end = last;
|
||||
}
|
||||
PacketQueue::LostPair lost;
|
||||
lost.first = 0;
|
||||
lost.second = 0;
|
||||
|
||||
uint32_t i = _pkt_expected_seq;
|
||||
bool finish = true;
|
||||
for (i = _pkt_expected_seq; i <= end;) {
|
||||
if (_pkt_map.find(i) == _pkt_map.end()) {
|
||||
if (finish) {
|
||||
finish = false;
|
||||
lost.first = i;
|
||||
lost.second = genExpectedSeq(i + 1);
|
||||
} else {
|
||||
lost.second = genExpectedSeq(i + 1);
|
||||
}
|
||||
} else {
|
||||
if (!finish) {
|
||||
finish = true;
|
||||
re.push_back(lost);
|
||||
}
|
||||
}
|
||||
i = genExpectedSeq(i + 1);
|
||||
}
|
||||
|
||||
return re;
|
||||
}
|
||||
|
||||
size_t PacketQueue::getSize() {
|
||||
return _pkt_map.size();
|
||||
}
|
||||
|
||||
size_t PacketQueue::getExpectedSize() {
|
||||
if (_pkt_map.empty()) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
uint32_t max = _pkt_map.rbegin()->first;
|
||||
uint32_t min = _pkt_map.begin()->first;
|
||||
if ((max - min) >= (MAX_SEQ >> 1)) {
|
||||
TraceL << "cycle "
|
||||
<< "expected seq " << _pkt_expected_seq << " min " << min << " max " << max << " size "
|
||||
<< _pkt_map.size();
|
||||
return MAX_SEQ - _pkt_expected_seq + min + 1;
|
||||
} else {
|
||||
return max - _pkt_expected_seq + 1;
|
||||
}
|
||||
}
|
||||
|
||||
size_t PacketQueue::getAvailableBufferSize() {
|
||||
auto size = getExpectedSize();
|
||||
if (_pkt_cap > size) {
|
||||
return _pkt_cap - size;
|
||||
}
|
||||
|
||||
if (_pkt_cap > _pkt_map.size()) {
|
||||
return _pkt_cap - _pkt_map.size();
|
||||
}
|
||||
WarnL << " cap " << _pkt_cap << " expected size " << size << " map size " << _pkt_map.size();
|
||||
return _pkt_cap;
|
||||
}
|
||||
|
||||
uint32_t PacketQueue::getExpectedSeq() {
|
||||
return _pkt_expected_seq;
|
||||
}
|
||||
|
||||
std::string PacketQueue::dump() {
|
||||
_StrPrinter printer;
|
||||
if (_pkt_map.empty()) {
|
||||
printer << " expected seq :" << _pkt_expected_seq;
|
||||
} else {
|
||||
printer << " expected seq :" << _pkt_expected_seq << " size:" << _pkt_map.size()
|
||||
<< " first:" << _pkt_map.begin()->second->packet_seq_number;
|
||||
printer << " last:" << _pkt_map.rbegin()->second->packet_seq_number;
|
||||
printer << " latency:" << timeLatency() / 1e3;
|
||||
}
|
||||
return std::move(printer);
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
46
srt/PacketQueue.hpp
Normal file
46
srt/PacketQueue.hpp
Normal file
@ -0,0 +1,46 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_PACKET_QUEUE_H
|
||||
#define ZLMEDIAKIT_SRT_PACKET_QUEUE_H
|
||||
#include "Packet.hpp"
|
||||
#include <algorithm>
|
||||
#include <list>
|
||||
#include <map>
|
||||
#include <memory>
|
||||
#include <tuple>
|
||||
#include <utility>
|
||||
|
||||
namespace SRT {
|
||||
|
||||
// for recv
|
||||
class PacketQueue {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<PacketQueue>;
|
||||
using LostPair = std::pair<uint32_t, uint32_t>;
|
||||
|
||||
PacketQueue(uint32_t max_size, uint32_t init_seq, uint32_t latency);
|
||||
~PacketQueue() = default;
|
||||
bool inputPacket(DataPacket::Ptr pkt, std::list<DataPacket::Ptr> &out);
|
||||
|
||||
uint32_t timeLatency();
|
||||
std::list<LostPair> getLostSeq();
|
||||
|
||||
size_t getSize();
|
||||
size_t getExpectedSize();
|
||||
size_t getAvailableBufferSize();
|
||||
uint32_t getExpectedSeq();
|
||||
|
||||
std::string dump();
|
||||
bool drop(uint32_t first, uint32_t last, std::list<DataPacket::Ptr> &out);
|
||||
|
||||
private:
|
||||
void tryInsertPkt(DataPacket::Ptr pkt);
|
||||
|
||||
private:
|
||||
uint32_t _pkt_cap;
|
||||
uint32_t _pkt_latency;
|
||||
uint32_t _pkt_expected_seq = 0;
|
||||
std::map<uint32_t, DataPacket::Ptr> _pkt_map;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_PACKET_QUEUE_H
|
||||
79
srt/PacketSendQueue.cpp
Normal file
79
srt/PacketSendQueue.cpp
Normal file
@ -0,0 +1,79 @@
|
||||
#include "PacketSendQueue.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
PacketSendQueue::PacketSendQueue(uint32_t max_size, uint32_t latency)
|
||||
: _pkt_cap(max_size)
|
||||
, _pkt_latency(latency) {}
|
||||
|
||||
bool PacketSendQueue::drop(uint32_t num) {
|
||||
decltype(_pkt_cache.begin()) it;
|
||||
for (it = _pkt_cache.begin(); it != _pkt_cache.end(); ++it) {
|
||||
if ((*it)->packet_seq_number == num) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (it != _pkt_cache.end()) {
|
||||
_pkt_cache.erase(_pkt_cache.begin(), it);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool PacketSendQueue::inputPacket(DataPacket::Ptr pkt) {
|
||||
_pkt_cache.push_back(pkt);
|
||||
while (_pkt_cache.size() > _pkt_cap) {
|
||||
_pkt_cache.pop_front();
|
||||
}
|
||||
while (timeLatency() > _pkt_latency) {
|
||||
_pkt_cache.pop_front();
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
std::list<DataPacket::Ptr> PacketSendQueue::findPacketBySeq(uint32_t start, uint32_t end) {
|
||||
std::list<DataPacket::Ptr> re;
|
||||
decltype(_pkt_cache.begin()) it;
|
||||
for (it = _pkt_cache.begin(); it != _pkt_cache.end(); ++it) {
|
||||
if ((*it)->packet_seq_number == start) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (start == end) {
|
||||
if (it != _pkt_cache.end()) {
|
||||
re.push_back(*it);
|
||||
}
|
||||
return re;
|
||||
}
|
||||
|
||||
for (; it != _pkt_cache.end(); ++it) {
|
||||
re.push_back(*it);
|
||||
if ((*it)->packet_seq_number == end) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
return re;
|
||||
}
|
||||
|
||||
uint32_t PacketSendQueue::timeLatency() {
|
||||
if (_pkt_cache.empty()) {
|
||||
return 0;
|
||||
}
|
||||
auto first = _pkt_cache.front()->timestamp;
|
||||
auto last = _pkt_cache.back()->timestamp;
|
||||
uint32_t dur;
|
||||
|
||||
if (last > first) {
|
||||
dur = last - first;
|
||||
} else {
|
||||
dur = first - last;
|
||||
}
|
||||
if (dur > ((uint32_t)0x01 << 31)) {
|
||||
TraceL << "cycle timeLatency " << dur;
|
||||
dur = 0xffffffff - dur;
|
||||
}
|
||||
|
||||
return dur;
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
36
srt/PacketSendQueue.hpp
Normal file
36
srt/PacketSendQueue.hpp
Normal file
@ -0,0 +1,36 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_PACKET_SEND_QUEUE_H
|
||||
#define ZLMEDIAKIT_SRT_PACKET_SEND_QUEUE_H
|
||||
|
||||
#include "Packet.hpp"
|
||||
#include <algorithm>
|
||||
#include <list>
|
||||
#include <memory>
|
||||
#include <set>
|
||||
#include <tuple>
|
||||
#include <utility>
|
||||
|
||||
namespace SRT {
|
||||
|
||||
class PacketSendQueue {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<PacketSendQueue>;
|
||||
using LostPair = std::pair<uint32_t, uint32_t>;
|
||||
|
||||
PacketSendQueue(uint32_t max_size, uint32_t latency);
|
||||
~PacketSendQueue() = default;
|
||||
|
||||
bool drop(uint32_t num);
|
||||
bool inputPacket(DataPacket::Ptr pkt);
|
||||
std::list<DataPacket::Ptr> findPacketBySeq(uint32_t start, uint32_t end);
|
||||
|
||||
private:
|
||||
uint32_t timeLatency();
|
||||
private:
|
||||
uint32_t _pkt_cap;
|
||||
uint32_t _pkt_latency;
|
||||
std::list<DataPacket::Ptr> _pkt_cache;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_PACKET_SEND_QUEUE_H
|
||||
146
srt/SrtSession.cpp
Normal file
146
srt/SrtSession.cpp
Normal file
@ -0,0 +1,146 @@
|
||||
#include "SrtSession.hpp"
|
||||
#include "Packet.hpp"
|
||||
#include "SrtTransportImp.hpp"
|
||||
|
||||
#include "Common/config.h"
|
||||
|
||||
namespace SRT {
|
||||
using namespace mediakit;
|
||||
|
||||
SrtSession::SrtSession(const Socket::Ptr &sock)
|
||||
: UdpSession(sock) {
|
||||
socklen_t addr_len = sizeof(_peer_addr);
|
||||
memset(&_peer_addr, 0, addr_len);
|
||||
// TraceL<<"before addr len "<<addr_len;
|
||||
getpeername(sock->rawFD(), (struct sockaddr *)&_peer_addr, &addr_len);
|
||||
// TraceL<<"after addr len "<<addr_len<<" family "<<_peer_addr.ss_family;
|
||||
}
|
||||
|
||||
SrtSession::~SrtSession() {
|
||||
InfoP(this);
|
||||
}
|
||||
|
||||
EventPoller::Ptr SrtSession::queryPoller(const Buffer::Ptr &buffer) {
|
||||
uint8_t *data = (uint8_t *)buffer->data();
|
||||
size_t size = buffer->size();
|
||||
|
||||
if (DataPacket::isDataPacket(data, size)) {
|
||||
uint32_t socket_id = DataPacket::getSocketID(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getItem(std::to_string(socket_id));
|
||||
return trans ? trans->getPoller() : nullptr;
|
||||
}
|
||||
|
||||
if (HandshakePacket::isHandshakePacket(data, size)) {
|
||||
auto type = HandshakePacket::getHandshakeType(data, size);
|
||||
if (type == HandshakePacket::HS_TYPE_INDUCTION) {
|
||||
// 握手第一阶段
|
||||
return nullptr;
|
||||
} else if (type == HandshakePacket::HS_TYPE_CONCLUSION) {
|
||||
// 握手第二阶段
|
||||
uint32_t sync_cookie = HandshakePacket::getSynCookie(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getHandshakeItem(std::to_string(sync_cookie));
|
||||
return trans ? trans->getPoller() : nullptr;
|
||||
} else {
|
||||
WarnL << " not reach there";
|
||||
}
|
||||
} else {
|
||||
uint32_t socket_id = ControlPacket::getSocketID(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getItem(std::to_string(socket_id));
|
||||
return trans ? trans->getPoller() : nullptr;
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
void SrtSession::attachServer(const toolkit::Server &server) {
|
||||
SockUtil::setRecvBuf(getSock()->rawFD(), 1024 * 1024);
|
||||
}
|
||||
|
||||
void SrtSession::onRecv(const Buffer::Ptr &buffer) {
|
||||
uint8_t *data = (uint8_t *)buffer->data();
|
||||
size_t size = buffer->size();
|
||||
|
||||
if (_find_transport) {
|
||||
//只允许寻找一次transport
|
||||
_find_transport = false;
|
||||
|
||||
if (DataPacket::isDataPacket(data, size)) {
|
||||
uint32_t socket_id = DataPacket::getSocketID(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getItem(std::to_string(socket_id));
|
||||
if (trans) {
|
||||
_transport = std::move(trans);
|
||||
} else {
|
||||
WarnL << " data packet not find transport ";
|
||||
}
|
||||
}
|
||||
|
||||
if (HandshakePacket::isHandshakePacket(data, size)) {
|
||||
auto type = HandshakePacket::getHandshakeType(data, size);
|
||||
if (type == HandshakePacket::HS_TYPE_INDUCTION) {
|
||||
// 握手第一阶段
|
||||
_transport = std::make_shared<SrtTransportImp>(getPoller());
|
||||
|
||||
} else if (type == HandshakePacket::HS_TYPE_CONCLUSION) {
|
||||
// 握手第二阶段
|
||||
uint32_t sync_cookie = HandshakePacket::getSynCookie(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getHandshakeItem(std::to_string(sync_cookie));
|
||||
if (trans) {
|
||||
_transport = std::move(trans);
|
||||
} else {
|
||||
WarnL << " hanshake packet not find transport ";
|
||||
}
|
||||
} else {
|
||||
WarnL << " not reach there";
|
||||
}
|
||||
} else {
|
||||
uint32_t socket_id = ControlPacket::getSocketID(data, size);
|
||||
auto trans = SrtTransportManager::Instance().getItem(std::to_string(socket_id));
|
||||
if (trans) {
|
||||
_transport = std::move(trans);
|
||||
} else {
|
||||
WarnL << " not find transport";
|
||||
}
|
||||
}
|
||||
|
||||
if (_transport) {
|
||||
_transport->setSession(shared_from_this());
|
||||
}
|
||||
InfoP(this);
|
||||
}
|
||||
_ticker.resetTime();
|
||||
|
||||
if (_transport) {
|
||||
_transport->inputSockData(data, size, &_peer_addr);
|
||||
} else {
|
||||
// WarnL<< "ingore data";
|
||||
}
|
||||
}
|
||||
|
||||
void SrtSession::onError(const SockException &err) {
|
||||
// udp链接超时，但是srt链接不一定超时，因为可能存在udp链接迁移的情况
|
||||
//在udp链接迁移时，新的SrtSession对象将接管SrtSession对象的生命周期
|
||||
//本SrtSession对象将在超时后自动销毁
|
||||
WarnP(this) << err.what();
|
||||
|
||||
if (!_transport) {
|
||||
return;
|
||||
}
|
||||
|
||||
// 防止互相引用导致不释放
|
||||
auto transport = std::move(_transport);
|
||||
getPoller()->async(
|
||||
[transport, err] {
|
||||
//延时减引用，防止使用transport对象时，销毁对象
|
||||
transport->onShutdown(err);
|
||||
},
|
||||
false);
|
||||
}
|
||||
|
||||
void SrtSession::onManager() {
|
||||
GET_CONFIG(float, timeoutSec, kTimeOutSec);
|
||||
if (_ticker.elapsedTime() > timeoutSec * 1000) {
|
||||
shutdown(SockException(Err_timeout, "srt connection timeout"));
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
30
srt/SrtSession.hpp
Normal file
30
srt/SrtSession.hpp
Normal file
@ -0,0 +1,30 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_SESSION_H
|
||||
#define ZLMEDIAKIT_SRT_SESSION_H
|
||||
|
||||
#include "Network/Session.h"
|
||||
#include "SrtTransport.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
using namespace toolkit;
|
||||
|
||||
class SrtSession : public UdpSession {
|
||||
public:
|
||||
SrtSession(const Socket::Ptr &sock);
|
||||
~SrtSession() override;
|
||||
|
||||
void onRecv(const Buffer::Ptr &) override;
|
||||
void onError(const SockException &err) override;
|
||||
void onManager() override;
|
||||
void attachServer(const toolkit::Server &server) override;
|
||||
static EventPoller::Ptr queryPoller(const Buffer::Ptr &buffer);
|
||||
|
||||
private:
|
||||
bool _find_transport = true;
|
||||
Ticker _ticker;
|
||||
struct sockaddr_storage _peer_addr;
|
||||
SrtTransport::Ptr _transport;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
#endif // ZLMEDIAKIT_SRT_SESSION_H
|
||||
673
srt/SrtTransport.cpp
Normal file
673
srt/SrtTransport.cpp
Normal file
@ -0,0 +1,673 @@
|
||||
#include "Util/onceToken.h"
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "Ack.hpp"
|
||||
#include "Packet.hpp"
|
||||
#include "SrtTransport.hpp"
|
||||
|
||||
namespace SRT {
|
||||
#define SRT_FIELD "srt."
|
||||
// srt 超时时间
|
||||
const std::string kTimeOutSec = SRT_FIELD "timeoutSec";
|
||||
// srt 单端口udp服务器
|
||||
const std::string kPort = SRT_FIELD "port";
|
||||
const std::string kLatencyMul = SRT_FIELD "latencyMul";
|
||||
|
||||
static std::atomic<uint32_t> s_srt_socket_id_generate { 125 };
|
||||
//////////// SrtTransport //////////////////////////
|
||||
SrtTransport::SrtTransport(const EventPoller::Ptr &poller)
|
||||
: _poller(poller) {
|
||||
_start_timestamp = SteadyClock::now();
|
||||
_socket_id = s_srt_socket_id_generate.fetch_add(1);
|
||||
_pkt_recv_rate_context = std::make_shared<PacketRecvRateContext>(_start_timestamp);
|
||||
_recv_rate_context = std::make_shared<RecvRateContext>(_start_timestamp);
|
||||
_estimated_link_capacity_context = std::make_shared<EstimatedLinkCapacityContext>(_start_timestamp);
|
||||
}
|
||||
|
||||
SrtTransport::~SrtTransport() {
|
||||
TraceL << " ";
|
||||
}
|
||||
|
||||
const EventPoller::Ptr &SrtTransport::getPoller() const {
|
||||
return _poller;
|
||||
}
|
||||
|
||||
void SrtTransport::setSession(Session::Ptr session) {
|
||||
_history_sessions.emplace(session.get(), session);
|
||||
if (_selected_session) {
|
||||
InfoL << "srt network changed: " << _selected_session->get_peer_ip() << ":"
|
||||
<< _selected_session->get_peer_port() << " -> " << session->get_peer_ip() << ":"
|
||||
<< session->get_peer_port() << ", id:" << _selected_session->getIdentifier();
|
||||
}
|
||||
_selected_session = session;
|
||||
}
|
||||
|
||||
const Session::Ptr &SrtTransport::getSession() const {
|
||||
return _selected_session;
|
||||
}
|
||||
|
||||
void SrtTransport::switchToOtherTransport(uint8_t *buf, int len, uint32_t socketid, struct sockaddr_storage *addr) {
|
||||
BufferRaw::Ptr tmp = BufferRaw::create();
|
||||
struct sockaddr_storage tmp_addr = *addr;
|
||||
tmp->assign((char *)buf, len);
|
||||
auto trans = SrtTransportManager::Instance().getItem(std::to_string(socketid));
|
||||
if (trans) {
|
||||
trans->getPoller()->async([tmp, tmp_addr, trans] {
|
||||
trans->inputSockData((uint8_t *)tmp->data(), tmp->size(), (struct sockaddr_storage *)&tmp_addr);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransport::inputSockData(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
using srt_control_handler = void (SrtTransport::*)(uint8_t * buf, int len, struct sockaddr_storage *addr);
|
||||
static std::unordered_map<uint16_t, srt_control_handler> s_control_functions;
|
||||
static onceToken token([]() {
|
||||
s_control_functions.emplace(ControlPacket::HANDSHAKE, &SrtTransport::handleHandshake);
|
||||
s_control_functions.emplace(ControlPacket::KEEPALIVE, &SrtTransport::handleKeeplive);
|
||||
s_control_functions.emplace(ControlPacket::ACK, &SrtTransport::handleACK);
|
||||
s_control_functions.emplace(ControlPacket::NAK, &SrtTransport::handleNAK);
|
||||
s_control_functions.emplace(ControlPacket::CONGESTIONWARNING, &SrtTransport::handleCongestionWarning);
|
||||
s_control_functions.emplace(ControlPacket::SHUTDOWN, &SrtTransport::handleShutDown);
|
||||
s_control_functions.emplace(ControlPacket::ACKACK, &SrtTransport::handleACKACK);
|
||||
s_control_functions.emplace(ControlPacket::DROPREQ, &SrtTransport::handleDropReq);
|
||||
s_control_functions.emplace(ControlPacket::PEERERROR, &SrtTransport::handlePeerError);
|
||||
s_control_functions.emplace(ControlPacket::USERDEFINEDTYPE, &SrtTransport::handleUserDefinedType);
|
||||
});
|
||||
_now = SteadyClock::now();
|
||||
// 处理srt数据
|
||||
if (DataPacket::isDataPacket(buf, len)) {
|
||||
uint32_t socketId = DataPacket::getSocketID(buf, len);
|
||||
if (socketId == _socket_id) {
|
||||
_pkt_recv_rate_context->inputPacket(_now);
|
||||
_estimated_link_capacity_context->inputPacket(_now);
|
||||
_recv_rate_context->inputPacket(_now, len);
|
||||
|
||||
handleDataPacket(buf, len, addr);
|
||||
} else {
|
||||
switchToOtherTransport(buf, len, socketId, addr);
|
||||
}
|
||||
} else {
|
||||
if (ControlPacket::isControlPacket(buf, len)) {
|
||||
uint32_t socketId = ControlPacket::getSocketID(buf, len);
|
||||
uint16_t type = ControlPacket::getControlType(buf, len);
|
||||
if (type != ControlPacket::HANDSHAKE && socketId != _socket_id && _socket_id != 0) {
|
||||
// socket id not same
|
||||
switchToOtherTransport(buf, len, socketId, addr);
|
||||
return;
|
||||
}
|
||||
_pkt_recv_rate_context->inputPacket(_now);
|
||||
_estimated_link_capacity_context->inputPacket(_now);
|
||||
_recv_rate_context->inputPacket(_now, len);
|
||||
|
||||
auto it = s_control_functions.find(type);
|
||||
if (it == s_control_functions.end()) {
|
||||
WarnL << " not support type ignore" << ControlPacket::getControlType(buf, len);
|
||||
return;
|
||||
} else {
|
||||
(this->*(it->second))(buf, len, addr);
|
||||
}
|
||||
} else {
|
||||
// not reach
|
||||
WarnL << "not reach this";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransport::handleHandshakeInduction(HandshakePacket &pkt, struct sockaddr_storage *addr) {
|
||||
// Induction Phase
|
||||
TraceL << getIdentifier() << " Induction Phase ";
|
||||
if (_handleshake_res) {
|
||||
TraceL << getIdentifier() << " Induction handle repeate ";
|
||||
sendControlPacket(_handleshake_res, true);
|
||||
return;
|
||||
}
|
||||
_induction_ts = _now;
|
||||
_start_timestamp = _now;
|
||||
_init_seq_number = pkt.initial_packet_sequence_number;
|
||||
_max_window_size = pkt.max_flow_window_size;
|
||||
_mtu = pkt.mtu;
|
||||
|
||||
_last_pkt_seq = _init_seq_number - 1;
|
||||
|
||||
_peer_socket_id = pkt.srt_socket_id;
|
||||
HandshakePacket::Ptr res = std::make_shared<HandshakePacket>();
|
||||
res->dst_socket_id = _peer_socket_id;
|
||||
res->timestamp = DurationCountMicroseconds(_start_timestamp.time_since_epoch());
|
||||
res->mtu = _mtu;
|
||||
res->max_flow_window_size = _max_window_size;
|
||||
res->initial_packet_sequence_number = _init_seq_number;
|
||||
res->version = 5;
|
||||
res->encryption_field = HandshakePacket::NO_ENCRYPTION;
|
||||
res->extension_field = 0x4A17;
|
||||
res->handshake_type = HandshakePacket::HS_TYPE_INDUCTION;
|
||||
res->srt_socket_id = _peer_socket_id;
|
||||
res->syn_cookie = HandshakePacket::generateSynCookie(addr, _start_timestamp);
|
||||
_sync_cookie = res->syn_cookie;
|
||||
memcpy(res->peer_ip_addr, pkt.peer_ip_addr, sizeof(pkt.peer_ip_addr) * sizeof(pkt.peer_ip_addr[0]));
|
||||
_handleshake_res = res;
|
||||
res->storeToData();
|
||||
|
||||
registerSelfHandshake();
|
||||
sendControlPacket(res, true);
|
||||
}
|
||||
|
||||
void SrtTransport::handleHandshakeConclusion(HandshakePacket &pkt, struct sockaddr_storage *addr) {
|
||||
if (!_handleshake_res) {
|
||||
ErrorL << "must Induction Phase for handleshake ";
|
||||
return;
|
||||
}
|
||||
|
||||
if (_handleshake_res->handshake_type == HandshakePacket::HS_TYPE_INDUCTION) {
|
||||
// first
|
||||
HSExtMessage::Ptr req;
|
||||
HSExtStreamID::Ptr sid;
|
||||
uint32_t srt_flag = 0xbf;
|
||||
uint16_t delay = DurationCountMicroseconds(_now - _induction_ts) * getLatencyMul() / 1000;
|
||||
|
||||
for (auto ext : pkt.ext_list) {
|
||||
// TraceL << getIdentifier() << " ext " << ext->dump();
|
||||
if (!req) {
|
||||
req = std::dynamic_pointer_cast<HSExtMessage>(ext);
|
||||
}
|
||||
if (!sid) {
|
||||
sid = std::dynamic_pointer_cast<HSExtStreamID>(ext);
|
||||
}
|
||||
}
|
||||
if (sid) {
|
||||
_stream_id = sid->streamid;
|
||||
}
|
||||
if (req) {
|
||||
srt_flag = req->srt_flag;
|
||||
delay = delay <= req->recv_tsbpd_delay ? req->recv_tsbpd_delay : delay;
|
||||
}
|
||||
TraceL << getIdentifier() << " CONCLUSION Phase ";
|
||||
HandshakePacket::Ptr res = std::make_shared<HandshakePacket>();
|
||||
res->dst_socket_id = _peer_socket_id;
|
||||
res->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
res->mtu = _mtu;
|
||||
res->max_flow_window_size = _max_window_size;
|
||||
res->initial_packet_sequence_number = _init_seq_number;
|
||||
res->version = 5;
|
||||
res->encryption_field = HandshakePacket::NO_ENCRYPTION;
|
||||
res->extension_field = HandshakePacket::HS_EXT_FILED_HSREQ;
|
||||
res->handshake_type = HandshakePacket::HS_TYPE_CONCLUSION;
|
||||
res->srt_socket_id = _socket_id;
|
||||
res->syn_cookie = 0;
|
||||
res->assignPeerIP(addr);
|
||||
HSExtMessage::Ptr ext = std::make_shared<HSExtMessage>();
|
||||
ext->extension_type = HSExt::SRT_CMD_HSRSP;
|
||||
ext->srt_version = srtVersion(1, 5, 0);
|
||||
ext->srt_flag = srt_flag;
|
||||
ext->recv_tsbpd_delay = ext->send_tsbpd_delay = delay;
|
||||
res->ext_list.push_back(std::move(ext));
|
||||
res->storeToData();
|
||||
_handleshake_res = res;
|
||||
unregisterSelfHandshake();
|
||||
registerSelf();
|
||||
sendControlPacket(res, true);
|
||||
TraceL << " buf size = " << res->max_flow_window_size << " init seq =" << _init_seq_number
|
||||
<< " latency=" << delay;
|
||||
_recv_buf = std::make_shared<PacketQueue>(res->max_flow_window_size, _init_seq_number, delay * 1e3);
|
||||
_send_buf = std::make_shared<PacketSendQueue>(res->max_flow_window_size, delay * 1e3);
|
||||
_send_packet_seq_number = _init_seq_number;
|
||||
_buf_delay = delay;
|
||||
onHandShakeFinished(_stream_id, addr);
|
||||
} else {
|
||||
TraceL << getIdentifier() << " CONCLUSION handle repeate ";
|
||||
sendControlPacket(_handleshake_res, true);
|
||||
}
|
||||
_last_ack_pkt_seq_num = _init_seq_number;
|
||||
}
|
||||
|
||||
void SrtTransport::handleHandshake(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
HandshakePacket pkt;
|
||||
assert(pkt.loadFromData(buf, len));
|
||||
|
||||
if (pkt.handshake_type == HandshakePacket::HS_TYPE_INDUCTION) {
|
||||
handleHandshakeInduction(pkt, addr);
|
||||
} else if (pkt.handshake_type == HandshakePacket::HS_TYPE_CONCLUSION) {
|
||||
handleHandshakeConclusion(pkt, addr);
|
||||
} else {
|
||||
WarnL << " not support handshake type = " << pkt.handshake_type;
|
||||
}
|
||||
_ack_ticker.resetTime(_now);
|
||||
_nak_ticker.resetTime(_now);
|
||||
}
|
||||
|
||||
void SrtTransport::handleKeeplive(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
// TraceL;
|
||||
sendKeepLivePacket();
|
||||
}
|
||||
|
||||
void SrtTransport::sendKeepLivePacket() {
|
||||
KeepLivePacket::Ptr pkt = std::make_shared<KeepLivePacket>();
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->storeToData();
|
||||
sendControlPacket(pkt, true);
|
||||
}
|
||||
|
||||
void SrtTransport::handleACK(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
// TraceL;
|
||||
ACKPacket ack;
|
||||
if (!ack.loadFromData(buf, len)) {
|
||||
return;
|
||||
}
|
||||
|
||||
ACKACKPacket::Ptr pkt = std::make_shared<ACKACKPacket>();
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->ack_number = ack.ack_number;
|
||||
pkt->storeToData();
|
||||
_send_buf->drop(ack.last_ack_pkt_seq_number);
|
||||
sendControlPacket(pkt, true);
|
||||
// TraceL<<"ack number "<<ack.ack_number;
|
||||
}
|
||||
|
||||
void SrtTransport::sendMsgDropReq(uint32_t first, uint32_t last) {
|
||||
MsgDropReqPacket::Ptr pkt = std::make_shared<MsgDropReqPacket>();
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->first_pkt_seq_num = first;
|
||||
pkt->last_pkt_seq_num = last;
|
||||
pkt->storeToData();
|
||||
sendControlPacket(pkt, true);
|
||||
}
|
||||
|
||||
void SrtTransport::handleNAK(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
// TraceL;
|
||||
NAKPacket pkt;
|
||||
pkt.loadFromData(buf, len);
|
||||
bool empty = false;
|
||||
bool flush = false;
|
||||
|
||||
for (auto it : pkt.lost_list) {
|
||||
if (pkt.lost_list.back() == it) {
|
||||
flush = true;
|
||||
}
|
||||
empty = true;
|
||||
auto re_list = _send_buf->findPacketBySeq(it.first, it.second - 1);
|
||||
for (auto pkt : re_list) {
|
||||
pkt->R = 1;
|
||||
pkt->storeToHeader();
|
||||
sendPacket(pkt, flush);
|
||||
empty = false;
|
||||
}
|
||||
if (empty) {
|
||||
sendMsgDropReq(it.first, it.second - 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransport::handleCongestionWarning(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
TraceL;
|
||||
}
|
||||
|
||||
void SrtTransport::handleShutDown(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
TraceL;
|
||||
onShutdown(SockException(Err_shutdown, "peer close connection"));
|
||||
}
|
||||
|
||||
void SrtTransport::handleDropReq(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
MsgDropReqPacket pkt;
|
||||
pkt.loadFromData(buf, len);
|
||||
std::list<DataPacket::Ptr> list;
|
||||
// TraceL<<"drop "<<pkt.first_pkt_seq_num<<" last "<<pkt.last_pkt_seq_num;
|
||||
_recv_buf->drop(pkt.first_pkt_seq_num, pkt.last_pkt_seq_num, list);
|
||||
if (list.empty()) {
|
||||
return;
|
||||
}
|
||||
uint32_t max_seq = 0;
|
||||
for (auto data : list) {
|
||||
max_seq = data->packet_seq_number;
|
||||
if (_last_pkt_seq + 1 != data->packet_seq_number) {
|
||||
TraceL << "pkt lost " << _last_pkt_seq + 1 << "->" << data->packet_seq_number;
|
||||
}
|
||||
_last_pkt_seq = data->packet_seq_number;
|
||||
onSRTData(std::move(data));
|
||||
}
|
||||
_recv_nack.drop(max_seq);
|
||||
|
||||
auto lost = _recv_buf->getLostSeq();
|
||||
_recv_nack.update(_now, lost);
|
||||
lost.clear();
|
||||
_recv_nack.getLostList(_now, _rtt, _rtt_variance, lost);
|
||||
if (!lost.empty()) {
|
||||
sendNAKPacket(lost);
|
||||
// TraceL << "check lost send nack";
|
||||
}
|
||||
|
||||
auto nak_interval = (_rtt + _rtt_variance * 4) / 2;
|
||||
if (nak_interval <= 20 * 1000) {
|
||||
nak_interval = 20 * 1000;
|
||||
}
|
||||
if (_nak_ticker.elapsedTime(_now) > nak_interval) {
|
||||
auto lost = _recv_buf->getLostSeq();
|
||||
if (!lost.empty()) {
|
||||
sendNAKPacket(lost);
|
||||
}
|
||||
_nak_ticker.resetTime(_now);
|
||||
}
|
||||
|
||||
if (_ack_ticker.elapsedTime(_now) > 10 * 1000) {
|
||||
_light_ack_pkt_count = 0;
|
||||
_ack_ticker.resetTime(_now);
|
||||
// send a ack per 10 ms for receiver
|
||||
sendACKPacket();
|
||||
} else {
|
||||
if (_light_ack_pkt_count >= 64) {
|
||||
// for high bitrate stream send light ack
|
||||
// TODO
|
||||
sendLightACKPacket();
|
||||
TraceL << "send light ack";
|
||||
}
|
||||
_light_ack_pkt_count = 0;
|
||||
}
|
||||
_light_ack_pkt_count++;
|
||||
}
|
||||
|
||||
void SrtTransport::handleUserDefinedType(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
TraceL;
|
||||
}
|
||||
|
||||
void SrtTransport::handleACKACK(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
// TraceL;
|
||||
ACKACKPacket::Ptr pkt = std::make_shared<ACKACKPacket>();
|
||||
pkt->loadFromData(buf, len);
|
||||
|
||||
uint32_t rtt = DurationCountMicroseconds(_now - _ack_send_timestamp[pkt->ack_number]);
|
||||
_rtt_variance = (3 * _rtt_variance + abs((long)_rtt - (long)rtt)) / 4;
|
||||
_rtt = (7 * rtt + _rtt) / 8;
|
||||
|
||||
// TraceL<<" rtt:"<<_rtt<<" rtt variance:"<<_rtt_variance;
|
||||
_ack_send_timestamp.erase(pkt->ack_number);
|
||||
}
|
||||
|
||||
void SrtTransport::handlePeerError(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
TraceL;
|
||||
}
|
||||
|
||||
void SrtTransport::sendACKPacket() {
|
||||
ACKPacket::Ptr pkt = std::make_shared<ACKPacket>();
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->ack_number = ++_ack_number_count;
|
||||
pkt->last_ack_pkt_seq_number = _recv_buf->getExpectedSeq();
|
||||
pkt->rtt = _rtt;
|
||||
pkt->rtt_variance = _rtt_variance;
|
||||
pkt->available_buf_size = _recv_buf->getAvailableBufferSize();
|
||||
pkt->pkt_recv_rate = _pkt_recv_rate_context->getPacketRecvRate();
|
||||
pkt->estimated_link_capacity = _estimated_link_capacity_context->getEstimatedLinkCapacity();
|
||||
pkt->recv_rate = _recv_rate_context->getRecvRate();
|
||||
pkt->storeToData();
|
||||
_ack_send_timestamp[pkt->ack_number] = _now;
|
||||
_last_ack_pkt_seq_num = pkt->last_ack_pkt_seq_number;
|
||||
sendControlPacket(pkt, true);
|
||||
// TraceL<<"send ack "<<pkt->dump();
|
||||
}
|
||||
|
||||
void SrtTransport::sendLightACKPacket() {
|
||||
ACKPacket::Ptr pkt = std::make_shared<ACKPacket>();
|
||||
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->ack_number = 0;
|
||||
pkt->last_ack_pkt_seq_number = _recv_buf->getExpectedSeq();
|
||||
pkt->rtt = 0;
|
||||
pkt->rtt_variance = 0;
|
||||
pkt->available_buf_size = 0;
|
||||
pkt->pkt_recv_rate = 0;
|
||||
pkt->estimated_link_capacity = 0;
|
||||
pkt->recv_rate = 0;
|
||||
pkt->storeToData();
|
||||
_last_ack_pkt_seq_num = pkt->last_ack_pkt_seq_number;
|
||||
sendControlPacket(pkt, true);
|
||||
TraceL << "send ack " << pkt->dump();
|
||||
}
|
||||
|
||||
void SrtTransport::sendNAKPacket(std::list<PacketQueue::LostPair> &lost_list) {
|
||||
NAKPacket::Ptr pkt = std::make_shared<NAKPacket>();
|
||||
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->lost_list = lost_list;
|
||||
|
||||
pkt->storeToData();
|
||||
|
||||
// TraceL<<"send NAK "<<pkt->dump();
|
||||
sendControlPacket(pkt, true);
|
||||
}
|
||||
|
||||
void SrtTransport::sendShutDown() {
|
||||
ShutDownPacket::Ptr pkt = std::make_shared<ShutDownPacket>();
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(_now - _start_timestamp);
|
||||
pkt->storeToData();
|
||||
sendControlPacket(pkt, true);
|
||||
}
|
||||
|
||||
void SrtTransport::handleDataPacket(uint8_t *buf, int len, struct sockaddr_storage *addr) {
|
||||
DataPacket::Ptr pkt = std::make_shared<DataPacket>();
|
||||
pkt->loadFromData(buf, len);
|
||||
|
||||
std::list<DataPacket::Ptr> list;
|
||||
//TraceL<<" seq="<< pkt->packet_seq_number<<" ts="<<pkt->timestamp<<" size="<<pkt->payloadSize()<<\
|
||||
//" PP="<<(int)pkt->PP<<" O="<<(int)pkt->O<<" kK="<<(int)pkt->KK<<" R="<<(int)pkt->R;
|
||||
_recv_buf->inputPacket(pkt, list);
|
||||
if (list.empty()) {
|
||||
// when no data ok send nack to sender immediately
|
||||
} else {
|
||||
uint32_t last_seq;
|
||||
for (auto data : list) {
|
||||
last_seq = data->packet_seq_number;
|
||||
if (_last_pkt_seq + 1 != data->packet_seq_number) {
|
||||
TraceL << "pkt lost " << _last_pkt_seq + 1 << "->" << data->packet_seq_number;
|
||||
}
|
||||
_last_pkt_seq = data->packet_seq_number;
|
||||
onSRTData(std::move(data));
|
||||
}
|
||||
_recv_nack.drop(last_seq);
|
||||
}
|
||||
|
||||
auto lost = _recv_buf->getLostSeq();
|
||||
_recv_nack.update(_now, lost);
|
||||
lost.clear();
|
||||
_recv_nack.getLostList(_now, _rtt, _rtt_variance, lost);
|
||||
if (!lost.empty()) {
|
||||
// TraceL << "check lost send nack immediately";
|
||||
sendNAKPacket(lost);
|
||||
}
|
||||
|
||||
auto nak_interval = (_rtt + _rtt_variance * 4) / 2;
|
||||
if (nak_interval <= 20 * 1000) {
|
||||
nak_interval = 20 * 1000;
|
||||
}
|
||||
|
||||
if (_nak_ticker.elapsedTime(_now) > nak_interval) {
|
||||
// Periodic NAK reports
|
||||
auto lost = _recv_buf->getLostSeq();
|
||||
if (!lost.empty()) {
|
||||
sendNAKPacket(lost);
|
||||
// TraceL<<"send NAK";
|
||||
} else {
|
||||
// TraceL<<"lost is empty";
|
||||
}
|
||||
_nak_ticker.resetTime(_now);
|
||||
}
|
||||
|
||||
if (_ack_ticker.elapsedTime(_now) > 10 * 1000) {
|
||||
_light_ack_pkt_count = 0;
|
||||
_ack_ticker.resetTime(_now);
|
||||
// send a ack per 10 ms for receiver
|
||||
sendACKPacket();
|
||||
} else {
|
||||
if (_light_ack_pkt_count >= 64) {
|
||||
// for high bitrate stream send light ack
|
||||
// TODO
|
||||
sendLightACKPacket();
|
||||
TraceL << "send light ack";
|
||||
}
|
||||
_light_ack_pkt_count = 0;
|
||||
}
|
||||
_light_ack_pkt_count++;
|
||||
// bufCheckInterval();
|
||||
}
|
||||
|
||||
void SrtTransport::sendDataPacket(DataPacket::Ptr pkt, char *buf, int len, bool flush) {
|
||||
pkt->storeToData((uint8_t *)buf, len);
|
||||
sendPacket(pkt, flush);
|
||||
_send_buf->inputPacket(pkt);
|
||||
}
|
||||
|
||||
void SrtTransport::sendControlPacket(ControlPacket::Ptr pkt, bool flush) {
|
||||
sendPacket(pkt, flush);
|
||||
}
|
||||
|
||||
void SrtTransport::sendPacket(Buffer::Ptr pkt, bool flush) {
|
||||
if (_selected_session) {
|
||||
auto tmp = _packet_pool.obtain2();
|
||||
tmp->assign(pkt->data(), pkt->size());
|
||||
_selected_session->setSendFlushFlag(flush);
|
||||
_selected_session->send(std::move(tmp));
|
||||
} else {
|
||||
WarnL << "not reach this";
|
||||
}
|
||||
}
|
||||
|
||||
std::string SrtTransport::getIdentifier() {
|
||||
return _selected_session ? _selected_session->getIdentifier() : "";
|
||||
}
|
||||
|
||||
void SrtTransport::registerSelfHandshake() {
|
||||
SrtTransportManager::Instance().addHandshakeItem(std::to_string(_sync_cookie), shared_from_this());
|
||||
}
|
||||
|
||||
void SrtTransport::unregisterSelfHandshake() {
|
||||
if (_sync_cookie == 0) {
|
||||
return;
|
||||
}
|
||||
SrtTransportManager::Instance().removeHandshakeItem(std::to_string(_sync_cookie));
|
||||
}
|
||||
|
||||
void SrtTransport::registerSelf() {
|
||||
if (_socket_id == 0) {
|
||||
return;
|
||||
}
|
||||
SrtTransportManager::Instance().addItem(std::to_string(_socket_id), shared_from_this());
|
||||
}
|
||||
|
||||
void SrtTransport::unregisterSelf() {
|
||||
SrtTransportManager::Instance().removeItem(std::to_string(_socket_id));
|
||||
}
|
||||
|
||||
void SrtTransport::onShutdown(const SockException &ex) {
|
||||
sendShutDown();
|
||||
WarnL << ex.what();
|
||||
unregisterSelfHandshake();
|
||||
unregisterSelf();
|
||||
for (auto &pr : _history_sessions) {
|
||||
auto session = pr.second.lock();
|
||||
if (session) {
|
||||
session->shutdown(ex);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
size_t SrtTransport::getPayloadSize() {
|
||||
size_t ret = (_mtu - 28 - 16) / 188 * 188;
|
||||
return ret;
|
||||
}
|
||||
|
||||
void SrtTransport::onSendTSData(const Buffer::Ptr &buffer, bool flush) {
|
||||
// TraceL;
|
||||
DataPacket::Ptr pkt;
|
||||
size_t payloadSize = getPayloadSize();
|
||||
size_t size = buffer->size();
|
||||
char *ptr = buffer->data();
|
||||
char *end = buffer->data() + size;
|
||||
|
||||
while (ptr < end && size >= payloadSize) {
|
||||
pkt = std::make_shared<DataPacket>();
|
||||
pkt->f = 0;
|
||||
pkt->packet_seq_number = _send_packet_seq_number & 0x7fffffff;
|
||||
_send_packet_seq_number = (_send_packet_seq_number + 1) & 0x7fffffff;
|
||||
pkt->PP = 3;
|
||||
pkt->O = 0;
|
||||
pkt->KK = 0;
|
||||
pkt->R = 0;
|
||||
pkt->msg_number = _send_msg_number++;
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(SteadyClock::now() - _start_timestamp);
|
||||
sendDataPacket(pkt, ptr, (int)payloadSize, flush);
|
||||
ptr += payloadSize;
|
||||
size -= payloadSize;
|
||||
}
|
||||
|
||||
if (size > 0 && ptr < end) {
|
||||
pkt = std::make_shared<DataPacket>();
|
||||
pkt->f = 0;
|
||||
pkt->packet_seq_number = _send_packet_seq_number & 0x7fffffff;
|
||||
_send_packet_seq_number = (_send_packet_seq_number + 1) & 0x7fffffff;
|
||||
pkt->PP = 3;
|
||||
pkt->O = 0;
|
||||
pkt->KK = 0;
|
||||
pkt->R = 0;
|
||||
pkt->msg_number = _send_msg_number++;
|
||||
pkt->dst_socket_id = _peer_socket_id;
|
||||
pkt->timestamp = DurationCountMicroseconds(SteadyClock::now() - _start_timestamp);
|
||||
sendDataPacket(pkt, ptr, (int)size, flush);
|
||||
}
|
||||
}
|
||||
|
||||
//////////// SrtTransportManager //////////////////////////
|
||||
|
||||
SrtTransportManager &SrtTransportManager::Instance() {
|
||||
static SrtTransportManager s_instance;
|
||||
return s_instance;
|
||||
}
|
||||
|
||||
void SrtTransportManager::addItem(const std::string &key, const SrtTransport::Ptr &ptr) {
|
||||
std::lock_guard<std::mutex> lck(_mtx);
|
||||
_map[key] = ptr;
|
||||
}
|
||||
|
||||
SrtTransport::Ptr SrtTransportManager::getItem(const std::string &key) {
|
||||
if (key.empty()) {
|
||||
return nullptr;
|
||||
}
|
||||
std::lock_guard<std::mutex> lck(_mtx);
|
||||
auto it = _map.find(key);
|
||||
if (it == _map.end()) {
|
||||
return nullptr;
|
||||
}
|
||||
return it->second.lock();
|
||||
}
|
||||
|
||||
void SrtTransportManager::removeItem(const std::string &key) {
|
||||
std::lock_guard<std::mutex> lck(_mtx);
|
||||
_map.erase(key);
|
||||
}
|
||||
|
||||
void SrtTransportManager::addHandshakeItem(const std::string &key, const SrtTransport::Ptr &ptr) {
|
||||
std::lock_guard<std::mutex> lck(_handshake_mtx);
|
||||
_handshake_map[key] = ptr;
|
||||
}
|
||||
|
||||
void SrtTransportManager::removeHandshakeItem(const std::string &key) {
|
||||
std::lock_guard<std::mutex> lck(_handshake_mtx);
|
||||
_handshake_map.erase(key);
|
||||
}
|
||||
|
||||
SrtTransport::Ptr SrtTransportManager::getHandshakeItem(const std::string &key) {
|
||||
if (key.empty()) {
|
||||
return nullptr;
|
||||
}
|
||||
std::lock_guard<std::mutex> lck(_handshake_mtx);
|
||||
auto it = _handshake_map.find(key);
|
||||
if (it == _handshake_map.end()) {
|
||||
return nullptr;
|
||||
}
|
||||
return it->second.lock();
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
169
srt/SrtTransport.hpp
Normal file
169
srt/SrtTransport.hpp
Normal file
@ -0,0 +1,169 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_TRANSPORT_H
|
||||
#define ZLMEDIAKIT_SRT_TRANSPORT_H
|
||||
|
||||
#include <atomic>
|
||||
#include <chrono>
|
||||
#include <memory>
|
||||
#include <mutex>
|
||||
|
||||
#include "Network/Session.h"
|
||||
#include "Poller/EventPoller.h"
|
||||
#include "Poller/Timer.h"
|
||||
|
||||
#include "Common.hpp"
|
||||
#include "NackContext.hpp"
|
||||
#include "Packet.hpp"
|
||||
#include "PacketQueue.hpp"
|
||||
#include "PacketSendQueue.hpp"
|
||||
#include "Statistic.hpp"
|
||||
namespace SRT {
|
||||
|
||||
using namespace toolkit;
|
||||
|
||||
extern const std::string kPort;
|
||||
extern const std::string kTimeOutSec;
|
||||
extern const std::string kLatencyMul;
|
||||
|
||||
class SrtTransport : public std::enable_shared_from_this<SrtTransport> {
|
||||
public:
|
||||
friend class SrtSession;
|
||||
using Ptr = std::shared_ptr<SrtTransport>;
|
||||
|
||||
SrtTransport(const EventPoller::Ptr &poller);
|
||||
virtual ~SrtTransport();
|
||||
const EventPoller::Ptr &getPoller() const;
|
||||
void setSession(Session::Ptr session);
|
||||
const Session::Ptr &getSession() const;
|
||||
|
||||
/**
|
||||
* socket收到udp数据
|
||||
* @param buf 数据指针
|
||||
* @param len 数据长度
|
||||
* @param addr 数据来源地址
|
||||
*/
|
||||
virtual void inputSockData(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
virtual void onSendTSData(const Buffer::Ptr &buffer, bool flush);
|
||||
|
||||
std::string getIdentifier();
|
||||
void unregisterSelf();
|
||||
void unregisterSelfHandshake();
|
||||
|
||||
protected:
|
||||
virtual bool isPusher() { return true; };
|
||||
virtual void onSRTData(DataPacket::Ptr pkt) {};
|
||||
virtual void onShutdown(const SockException &ex);
|
||||
virtual void onHandShakeFinished(std::string &streamid, struct sockaddr_storage *addr) {};
|
||||
virtual void sendPacket(Buffer::Ptr pkt, bool flush = true);
|
||||
virtual int getLatencyMul() { return 4; };
|
||||
|
||||
private:
|
||||
void registerSelf();
|
||||
void registerSelfHandshake();
|
||||
|
||||
void switchToOtherTransport(uint8_t *buf, int len, uint32_t socketid, struct sockaddr_storage *addr);
|
||||
|
||||
void handleHandshake(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleHandshakeInduction(HandshakePacket &pkt, struct sockaddr_storage *addr);
|
||||
void handleHandshakeConclusion(HandshakePacket &pkt, struct sockaddr_storage *addr);
|
||||
|
||||
void handleKeeplive(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleACK(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleACKACK(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleNAK(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleCongestionWarning(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleShutDown(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleDropReq(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleUserDefinedType(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handlePeerError(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
void handleDataPacket(uint8_t *buf, int len, struct sockaddr_storage *addr);
|
||||
|
||||
void sendNAKPacket(std::list<PacketQueue::LostPair> &lost_list);
|
||||
void sendACKPacket();
|
||||
void sendLightACKPacket();
|
||||
void sendKeepLivePacket();
|
||||
void sendShutDown();
|
||||
void sendMsgDropReq(uint32_t first, uint32_t last);
|
||||
|
||||
size_t getPayloadSize();
|
||||
|
||||
protected:
|
||||
void sendDataPacket(DataPacket::Ptr pkt, char *buf, int len, bool flush = false);
|
||||
void sendControlPacket(ControlPacket::Ptr pkt, bool flush = true);
|
||||
|
||||
private:
|
||||
// 当前选中的udp链接
|
||||
Session::Ptr _selected_session;
|
||||
// 链接迁移前后使用过的udp链接
|
||||
std::unordered_map<Session *, std::weak_ptr<Session>> _history_sessions;
|
||||
|
||||
EventPoller::Ptr _poller;
|
||||
|
||||
uint32_t _peer_socket_id;
|
||||
uint32_t _socket_id = 0;
|
||||
|
||||
TimePoint _now;
|
||||
TimePoint _start_timestamp;
|
||||
|
||||
// for calculate rtt for delay
|
||||
TimePoint _induction_ts;
|
||||
|
||||
uint32_t _mtu = 1500;
|
||||
uint32_t _max_window_size = 8192;
|
||||
uint32_t _init_seq_number = 0;
|
||||
|
||||
std::string _stream_id;
|
||||
uint32_t _sync_cookie = 0;
|
||||
uint32_t _send_packet_seq_number = 0;
|
||||
uint32_t _send_msg_number = 1;
|
||||
|
||||
PacketSendQueue::Ptr _send_buf;
|
||||
uint32_t _buf_delay = 120;
|
||||
PacketQueue::Ptr _recv_buf;
|
||||
NackContext _recv_nack;
|
||||
uint32_t _rtt = 100 * 1000;
|
||||
uint32_t _rtt_variance = 50 * 1000;
|
||||
uint32_t _light_ack_pkt_count = 0;
|
||||
uint32_t _ack_number_count = 0;
|
||||
uint32_t _last_ack_pkt_seq_num = 0;
|
||||
|
||||
uint32_t _last_pkt_seq = 0;
|
||||
UTicker _ack_ticker;
|
||||
std::map<uint32_t, TimePoint> _ack_send_timestamp;
|
||||
|
||||
std::shared_ptr<PacketRecvRateContext> _pkt_recv_rate_context;
|
||||
std::shared_ptr<EstimatedLinkCapacityContext> _estimated_link_capacity_context;
|
||||
std::shared_ptr<RecvRateContext> _recv_rate_context;
|
||||
|
||||
UTicker _nak_ticker;
|
||||
|
||||
// 保持发送的握手消息，防止丢失重发
|
||||
HandshakePacket::Ptr _handleshake_res;
|
||||
|
||||
ResourcePool<BufferRaw> _packet_pool;
|
||||
};
|
||||
|
||||
class SrtTransportManager {
|
||||
public:
|
||||
static SrtTransportManager &Instance();
|
||||
SrtTransport::Ptr getItem(const std::string &key);
|
||||
void addItem(const std::string &key, const SrtTransport::Ptr &ptr);
|
||||
void removeItem(const std::string &key);
|
||||
|
||||
void addHandshakeItem(const std::string &key, const SrtTransport::Ptr &ptr);
|
||||
void removeHandshakeItem(const std::string &key);
|
||||
SrtTransport::Ptr getHandshakeItem(const std::string &key);
|
||||
|
||||
private:
|
||||
SrtTransportManager() = default;
|
||||
|
||||
private:
|
||||
std::mutex _mtx;
|
||||
std::unordered_map<std::string, std::weak_ptr<SrtTransport>> _map;
|
||||
|
||||
std::mutex _handshake_mtx;
|
||||
std::unordered_map<std::string, std::weak_ptr<SrtTransport>> _handshake_map;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_TRANSPORT_H
|
||||
282
srt/SrtTransportImp.cpp
Normal file
282
srt/SrtTransportImp.cpp
Normal file
@ -0,0 +1,282 @@
|
||||
#include <memory>
|
||||
#include "Util/util.h"
|
||||
|
||||
#include "SrtTransportImp.hpp"
|
||||
|
||||
namespace SRT {
|
||||
SrtTransportImp::SrtTransportImp(const EventPoller::Ptr &poller) : SrtTransport(poller) {}
|
||||
|
||||
SrtTransportImp::~SrtTransportImp() {
|
||||
InfoP(this);
|
||||
uint64_t duration = _alive_ticker.createdTime() / 1000;
|
||||
WarnP(this) << (_is_pusher ? "srt 推流器(" : "srt 播放器(") << _media_info._vhost << "/" << _media_info._app << "/"
|
||||
<< _media_info._streamid << ")断开,耗时(s):" << duration;
|
||||
|
||||
//流量统计事件广播
|
||||
GET_CONFIG(uint32_t, iFlowThreshold, General::kFlowThreshold);
|
||||
if (_total_bytes >= iFlowThreshold * 1024) {
|
||||
NoticeCenter::Instance().emitEvent(
|
||||
Broadcast::kBroadcastFlowReport, _media_info, _total_bytes, duration, false,
|
||||
static_cast<SockInfo &>(*this));
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::onHandShakeFinished(std::string &streamid, struct sockaddr_storage *addr) {
|
||||
// TODO parse stream id like this zlmediakit.com/live/test?token=1213444&type=push
|
||||
if (!_addr) {
|
||||
_addr.reset(new sockaddr_storage(*((sockaddr_storage *)addr)));
|
||||
}
|
||||
_is_pusher = false;
|
||||
TraceL << " stream id " << streamid;
|
||||
if (streamid.empty()) {
|
||||
onShutdown(SockException(Err_shutdown, "stream id not empty"));
|
||||
return;
|
||||
}
|
||||
|
||||
_media_info.parse("srt://" + streamid);
|
||||
|
||||
auto params = Parser::parseArgs(_media_info._param_strs);
|
||||
if (params["type"] == "push") {
|
||||
_is_pusher = true;
|
||||
_decoder = DecoderImp::createDecoder(DecoderImp::decoder_ts, this);
|
||||
emitOnPublish();
|
||||
} else {
|
||||
_is_pusher = false;
|
||||
emitOnPlay();
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::onSRTData(DataPacket::Ptr pkt) {
|
||||
if (!_is_pusher) {
|
||||
WarnP(this) << "this is a player data ignore";
|
||||
return;
|
||||
}
|
||||
if (_decoder) {
|
||||
_decoder->input(reinterpret_cast<const uint8_t *>(pkt->payloadData()), pkt->payloadSize());
|
||||
} else {
|
||||
WarnP(this) << " not reach this";
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::onShutdown(const SockException &ex) {
|
||||
SrtTransport::onShutdown(ex);
|
||||
}
|
||||
|
||||
bool SrtTransportImp::close(mediakit::MediaSource &sender, bool force) {
|
||||
if (!force && totalReaderCount(sender)) {
|
||||
return false;
|
||||
}
|
||||
std::string err = StrPrinter << "close media:" << sender.getSchema() << "/"
|
||||
<< sender.getVhost() << "/"
|
||||
<< sender.getApp() << "/"
|
||||
<< sender.getId() << " " << force;
|
||||
weak_ptr<SrtTransportImp> weak_self = static_pointer_cast<SrtTransportImp>(shared_from_this());
|
||||
getPoller()->async([weak_self, err]() {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (strong_self) {
|
||||
strong_self->onShutdown(SockException(Err_shutdown, err));
|
||||
//主动关闭推流，那么不延时注销
|
||||
strong_self->_muxer = nullptr;
|
||||
}
|
||||
});
|
||||
return true;
|
||||
}
|
||||
|
||||
// 播放总人数
|
||||
int SrtTransportImp::totalReaderCount(mediakit::MediaSource &sender) {
|
||||
return _muxer ? _muxer->totalReaderCount() : sender.readerCount();
|
||||
}
|
||||
|
||||
// 获取媒体源类型
|
||||
mediakit::MediaOriginType SrtTransportImp::getOriginType(mediakit::MediaSource &sender) const {
|
||||
return MediaOriginType::srt_push;
|
||||
}
|
||||
|
||||
// 获取媒体源url或者文件路径
|
||||
std::string SrtTransportImp::getOriginUrl(mediakit::MediaSource &sender) const {
|
||||
return _media_info._full_url;
|
||||
}
|
||||
|
||||
// 获取媒体源客户端相关信息
|
||||
std::shared_ptr<SockInfo> SrtTransportImp::getOriginSock(mediakit::MediaSource &sender) const {
|
||||
return static_pointer_cast<SockInfo>(getSession());
|
||||
}
|
||||
|
||||
void SrtTransportImp::emitOnPublish() {
|
||||
std::weak_ptr<SrtTransportImp> weak_self = static_pointer_cast<SrtTransportImp>(shared_from_this());
|
||||
Broadcast::PublishAuthInvoker invoker = [weak_self](const std::string &err, const ProtocolOption &option) {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (!strong_self) {
|
||||
return;
|
||||
}
|
||||
if (err.empty()) {
|
||||
strong_self->_muxer = std::make_shared<MultiMediaSourceMuxer>(
|
||||
strong_self->_media_info._vhost, strong_self->_media_info._app, strong_self->_media_info._streamid,
|
||||
0.0f, option);
|
||||
strong_self->_muxer->setMediaListener(strong_self);
|
||||
strong_self->doCachedFunc();
|
||||
InfoP(strong_self) << "允许 srt 推流";
|
||||
} else {
|
||||
WarnP(strong_self) << "禁止 srt 推流:" << err;
|
||||
strong_self->onShutdown(SockException(Err_refused, err));
|
||||
}
|
||||
};
|
||||
|
||||
//触发推流鉴权事件
|
||||
auto flag = NoticeCenter::Instance().emitEvent(
|
||||
Broadcast::kBroadcastMediaPublish, MediaOriginType::srt_push, _media_info, invoker,
|
||||
static_cast<SockInfo &>(*this));
|
||||
if (!flag) {
|
||||
//该事件无人监听,默认不鉴权
|
||||
invoker("", ProtocolOption());
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::emitOnPlay() {
|
||||
std::weak_ptr<SrtTransportImp> weak_self = static_pointer_cast<SrtTransportImp>(shared_from_this());
|
||||
Broadcast::AuthInvoker invoker = [weak_self](const string &err) {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (!strong_self) {
|
||||
return;
|
||||
}
|
||||
strong_self->getPoller()->async([strong_self, err] {
|
||||
if (err != "") {
|
||||
strong_self->onShutdown(SockException(Err_refused, err));
|
||||
} else {
|
||||
strong_self->doPlay();
|
||||
}
|
||||
});
|
||||
};
|
||||
|
||||
auto flag = NoticeCenter::Instance().emitEvent(
|
||||
Broadcast::kBroadcastMediaPlayed, _media_info, invoker, static_cast<SockInfo &>(*this));
|
||||
if (!flag) {
|
||||
doPlay();
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::doPlay() {
|
||||
//异步查找直播流
|
||||
MediaInfo info = _media_info;
|
||||
info._schema = TS_SCHEMA;
|
||||
std::weak_ptr<SrtTransportImp> weak_self = static_pointer_cast<SrtTransportImp>(shared_from_this());
|
||||
MediaSource::findAsync(info, getSession(), [weak_self](const MediaSource::Ptr &src) {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (!strong_self) {
|
||||
//本对象已经销毁
|
||||
TraceL << "本对象已经销毁";
|
||||
return;
|
||||
}
|
||||
if (!src) {
|
||||
//未找到该流
|
||||
TraceL << "未找到该流";
|
||||
strong_self->onShutdown(SockException(Err_shutdown));
|
||||
} else {
|
||||
TraceL << "找到该流";
|
||||
auto ts_src = dynamic_pointer_cast<TSMediaSource>(src);
|
||||
assert(ts_src);
|
||||
ts_src->pause(false);
|
||||
strong_self->_ts_reader = ts_src->getRing()->attach(strong_self->getPoller());
|
||||
strong_self->_ts_reader->setDetachCB([weak_self]() {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (!strong_self) {
|
||||
//本对象已经销毁
|
||||
return;
|
||||
}
|
||||
strong_self->onShutdown(SockException(Err_shutdown));
|
||||
});
|
||||
strong_self->_ts_reader->setReadCB([weak_self](const TSMediaSource::RingDataType &ts_list) {
|
||||
auto strong_self = weak_self.lock();
|
||||
if (!strong_self) {
|
||||
//本对象已经销毁
|
||||
return;
|
||||
}
|
||||
size_t i = 0;
|
||||
auto size = ts_list->size();
|
||||
ts_list->for_each([&](const TSPacket::Ptr &ts) { strong_self->onSendTSData(ts, ++i == size); });
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
std::string SrtTransportImp::get_peer_ip() {
|
||||
if (!_addr) {
|
||||
return "::";
|
||||
}
|
||||
return SockUtil::inet_ntoa((sockaddr *)_addr.get());
|
||||
}
|
||||
|
||||
uint16_t SrtTransportImp::get_peer_port() {
|
||||
if (!_addr) {
|
||||
return 0;
|
||||
}
|
||||
return SockUtil::inet_port((sockaddr *)_addr.get());
|
||||
}
|
||||
|
||||
std::string SrtTransportImp::get_local_ip() {
|
||||
auto s = getSession();
|
||||
if (s) {
|
||||
return s->get_local_ip();
|
||||
}
|
||||
return "::";
|
||||
}
|
||||
|
||||
uint16_t SrtTransportImp::get_local_port() {
|
||||
auto s = getSession();
|
||||
if (s) {
|
||||
return s->get_local_port();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
std::string SrtTransportImp::getIdentifier() const {
|
||||
return _media_info._streamid;
|
||||
}
|
||||
|
||||
bool SrtTransportImp::inputFrame(const Frame::Ptr &frame) {
|
||||
if (_muxer) {
|
||||
return _muxer->inputFrame(frame);
|
||||
}
|
||||
if (_cached_func.size() > 200) {
|
||||
WarnL << "cached frame of track(" << frame->getCodecName() << ") is too much, now dropped";
|
||||
return false;
|
||||
}
|
||||
auto frame_cached = Frame::getCacheAbleFrame(frame);
|
||||
lock_guard<recursive_mutex> lck(_func_mtx);
|
||||
_cached_func.emplace_back([this, frame_cached]() { _muxer->inputFrame(frame_cached); });
|
||||
return true;
|
||||
}
|
||||
|
||||
bool SrtTransportImp::addTrack(const Track::Ptr &track) {
|
||||
if (_muxer) {
|
||||
return _muxer->addTrack(track);
|
||||
}
|
||||
|
||||
lock_guard<recursive_mutex> lck(_func_mtx);
|
||||
_cached_func.emplace_back([this, track]() { _muxer->addTrack(track); });
|
||||
return true;
|
||||
}
|
||||
|
||||
void SrtTransportImp::addTrackCompleted() {
|
||||
if (_muxer) {
|
||||
_muxer->addTrackCompleted();
|
||||
} else {
|
||||
lock_guard<recursive_mutex> lck(_func_mtx);
|
||||
_cached_func.emplace_back([this]() { _muxer->addTrackCompleted(); });
|
||||
}
|
||||
}
|
||||
|
||||
void SrtTransportImp::doCachedFunc() {
|
||||
lock_guard<recursive_mutex> lck(_func_mtx);
|
||||
for (auto &func : _cached_func) {
|
||||
func();
|
||||
}
|
||||
_cached_func.clear();
|
||||
}
|
||||
|
||||
int SrtTransportImp::getLatencyMul() {
|
||||
GET_CONFIG(int, latencyMul, kLatencyMul);
|
||||
return latencyMul;
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
92
srt/SrtTransportImp.hpp
Normal file
92
srt/SrtTransportImp.hpp
Normal file
@ -0,0 +1,92 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_TRANSPORT_IMP_H
|
||||
#define ZLMEDIAKIT_SRT_TRANSPORT_IMP_H
|
||||
|
||||
#include <mutex>
|
||||
#include "Rtp/Decoder.h"
|
||||
#include "SrtTransport.hpp"
|
||||
#include "TS/TSMediaSource.h"
|
||||
#include "Common/MultiMediaSourceMuxer.h"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
using namespace std;
|
||||
using namespace toolkit;
|
||||
using namespace mediakit;
|
||||
class SrtTransportImp
|
||||
: public SrtTransport
|
||||
, public toolkit::SockInfo
|
||||
, public MediaSinkInterface
|
||||
, public mediakit::MediaSourceEvent {
|
||||
public:
|
||||
SrtTransportImp(const EventPoller::Ptr &poller);
|
||||
~SrtTransportImp();
|
||||
|
||||
void inputSockData(uint8_t *buf, int len, struct sockaddr_storage *addr) override {
|
||||
SrtTransport::inputSockData(buf, len, addr);
|
||||
_total_bytes += len;
|
||||
}
|
||||
void onSendTSData(const Buffer::Ptr &buffer, bool flush) override { SrtTransport::onSendTSData(buffer, flush); }
|
||||
/// SockInfo override
|
||||
std::string get_local_ip() override;
|
||||
uint16_t get_local_port() override;
|
||||
std::string get_peer_ip() override;
|
||||
uint16_t get_peer_port() override;
|
||||
std::string getIdentifier() const override;
|
||||
|
||||
protected:
|
||||
///////SrtTransport override///////
|
||||
int getLatencyMul() override;
|
||||
void onSRTData(DataPacket::Ptr pkt) override;
|
||||
void onShutdown(const SockException &ex) override;
|
||||
void onHandShakeFinished(std::string &streamid, struct sockaddr_storage *addr) override;
|
||||
|
||||
void sendPacket(Buffer::Ptr pkt, bool flush = true) override {
|
||||
_total_bytes += pkt->size();
|
||||
SrtTransport::sendPacket(pkt, flush);
|
||||
}
|
||||
|
||||
bool isPusher() override { return _is_pusher; }
|
||||
|
||||
///////MediaSourceEvent override///////
|
||||
// 关闭
|
||||
bool close(mediakit::MediaSource &sender, bool force) override;
|
||||
// 播放总人数
|
||||
int totalReaderCount(mediakit::MediaSource &sender) override;
|
||||
// 获取媒体源类型
|
||||
mediakit::MediaOriginType getOriginType(mediakit::MediaSource &sender) const override;
|
||||
// 获取媒体源url或者文件路径
|
||||
std::string getOriginUrl(mediakit::MediaSource &sender) const override;
|
||||
// 获取媒体源客户端相关信息
|
||||
std::shared_ptr<SockInfo> getOriginSock(mediakit::MediaSource &sender) const override;
|
||||
|
||||
///////MediaSinkInterface override///////
|
||||
void resetTracks() override {};
|
||||
void addTrackCompleted() override;
|
||||
bool addTrack(const Track::Ptr &track) override;
|
||||
bool inputFrame(const Frame::Ptr &frame) override;
|
||||
|
||||
private:
|
||||
void emitOnPublish();
|
||||
void emitOnPlay();
|
||||
|
||||
void doPlay();
|
||||
void doCachedFunc();
|
||||
|
||||
private:
|
||||
bool _is_pusher = true;
|
||||
MediaInfo _media_info;
|
||||
uint64_t _total_bytes = 0;
|
||||
Ticker _alive_ticker;
|
||||
std::unique_ptr<sockaddr_storage> _addr;
|
||||
// for player
|
||||
TSMediaSource::RingType::RingReader::Ptr _ts_reader;
|
||||
// for pusher
|
||||
MultiMediaSourceMuxer::Ptr _muxer;
|
||||
DecoderImp::Ptr _decoder;
|
||||
std::recursive_mutex _func_mtx;
|
||||
std::deque<std::function<void()>> _cached_func;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
|
||||
#endif // ZLMEDIAKIT_SRT_TRANSPORT_IMP_H
|
||||
98
srt/Statistic.cpp
Normal file
98
srt/Statistic.cpp
Normal file
@ -0,0 +1,98 @@
|
||||
#include <algorithm>
|
||||
|
||||
#include "Statistic.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
void PacketRecvRateContext::inputPacket(TimePoint &ts) {
|
||||
if (_pkt_map.size() > 100) {
|
||||
_pkt_map.erase(_pkt_map.begin());
|
||||
}
|
||||
auto tmp = DurationCountMicroseconds(ts - _start);
|
||||
_pkt_map.emplace(tmp, tmp);
|
||||
}
|
||||
|
||||
uint32_t PacketRecvRateContext::getPacketRecvRate() {
|
||||
if (_pkt_map.size() < 2) {
|
||||
return 50000;
|
||||
}
|
||||
int64_t dur = 1000;
|
||||
for (auto it = _pkt_map.begin(); it != _pkt_map.end(); ++it) {
|
||||
auto next = it;
|
||||
++next;
|
||||
if (next == _pkt_map.end()) {
|
||||
break;
|
||||
}
|
||||
|
||||
if ((next->first - it->first) < dur) {
|
||||
dur = next->first - it->first;
|
||||
}
|
||||
}
|
||||
|
||||
double rate = 1e6 / (double)dur;
|
||||
if (rate <= 1000) {
|
||||
return 50000;
|
||||
}
|
||||
return rate;
|
||||
}
|
||||
|
||||
void EstimatedLinkCapacityContext::inputPacket(TimePoint &ts) {
|
||||
if (_pkt_map.size() > 16) {
|
||||
_pkt_map.erase(_pkt_map.begin());
|
||||
}
|
||||
auto tmp = DurationCountMicroseconds(ts - _start);
|
||||
_pkt_map.emplace(tmp, tmp);
|
||||
}
|
||||
|
||||
uint32_t EstimatedLinkCapacityContext::getEstimatedLinkCapacity() {
|
||||
decltype(_pkt_map.begin()) next;
|
||||
std::vector<int64_t> tmp;
|
||||
|
||||
for (auto it = _pkt_map.begin(); it != _pkt_map.end(); ++it) {
|
||||
next = it;
|
||||
++next;
|
||||
if (next != _pkt_map.end()) {
|
||||
tmp.push_back(next->first - it->first);
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
std::sort(tmp.begin(), tmp.end());
|
||||
if (tmp.empty()) {
|
||||
return 1000;
|
||||
}
|
||||
|
||||
if (tmp.size() < 16) {
|
||||
return 1000;
|
||||
}
|
||||
|
||||
double dur = tmp[0] / 1e6;
|
||||
return (uint32_t)(1.0 / dur);
|
||||
}
|
||||
|
||||
void RecvRateContext::inputPacket(TimePoint &ts, size_t size) {
|
||||
if (_pkt_map.size() > 100) {
|
||||
_pkt_map.erase(_pkt_map.begin());
|
||||
}
|
||||
auto tmp = DurationCountMicroseconds(ts - _start);
|
||||
_pkt_map.emplace(tmp, tmp);
|
||||
}
|
||||
|
||||
uint32_t RecvRateContext::getRecvRate() {
|
||||
if (_pkt_map.size() < 2) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
auto first = _pkt_map.begin();
|
||||
auto last = _pkt_map.rbegin();
|
||||
double dur = (last->first - first->first) / 1000000.0;
|
||||
|
||||
size_t bytes = 0;
|
||||
for (auto it : _pkt_map) {
|
||||
bytes += it.second;
|
||||
}
|
||||
double rate = (double)bytes / dur;
|
||||
return (uint32_t)rate;
|
||||
}
|
||||
|
||||
} // namespace SRT
|
||||
49
srt/Statistic.hpp
Normal file
49
srt/Statistic.hpp
Normal file
@ -0,0 +1,49 @@
|
||||
#ifndef ZLMEDIAKIT_SRT_STATISTIC_H
|
||||
#define ZLMEDIAKIT_SRT_STATISTIC_H
|
||||
#include <map>
|
||||
|
||||
#include "Common.hpp"
|
||||
#include "Packet.hpp"
|
||||
|
||||
namespace SRT {
|
||||
|
||||
class PacketRecvRateContext {
|
||||
public:
|
||||
PacketRecvRateContext(TimePoint start)
|
||||
: _start(start) {};
|
||||
~PacketRecvRateContext() = default;
|
||||
void inputPacket(TimePoint &ts);
|
||||
uint32_t getPacketRecvRate();
|
||||
|
||||
private:
|
||||
TimePoint _start;
|
||||
std::map<int64_t, int64_t> _pkt_map;
|
||||
};
|
||||
|
||||
class EstimatedLinkCapacityContext {
|
||||
public:
|
||||
EstimatedLinkCapacityContext(TimePoint start) : _start(start) {};
|
||||
~EstimatedLinkCapacityContext() = default;
|
||||
void inputPacket(TimePoint &ts);
|
||||
uint32_t getEstimatedLinkCapacity();
|
||||
|
||||
private:
|
||||
TimePoint _start;
|
||||
std::map<int64_t, int64_t> _pkt_map;
|
||||
};
|
||||
|
||||
class RecvRateContext {
|
||||
public:
|
||||
RecvRateContext(TimePoint start)
|
||||
: _start(start) {};
|
||||
~RecvRateContext() = default;
|
||||
void inputPacket(TimePoint &ts, size_t size);
|
||||
uint32_t getRecvRate();
|
||||
|
||||
private:
|
||||
TimePoint _start;
|
||||
std::map<int64_t, size_t> _pkt_map;
|
||||
};
|
||||
|
||||
} // namespace SRT
|
||||
#endif // ZLMEDIAKIT_SRT_STATISTIC_H
|
||||
25
srt/srt.md
Normal file
25
srt/srt.md
Normal file
@ -0,0 +1,25 @@
|
||||
## 特性
|
||||
- NACK(重传)
|
||||
- listener 支持
|
||||
- 推流只支持ts推流
|
||||
- 拉流只支持ts拉流
|
||||
- 协议实现 [参考](https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html)
|
||||
- 版本支持(>=1.3.0)
|
||||
- fec与加密没有实现
|
||||
|
||||
## 使用
|
||||
|
||||
zlm中的srt更加streamid 来确定是推流还是拉流，来确定vhost,app,streamid(ZLM中的)
|
||||
srt中的streamid 为 `<vhost>/<app>/<streamid>?type=<push|play>& <other>=<other>`
|
||||
|
||||
- OBS 推流地址
|
||||
|
||||
`srt://192.168.1.105:9000?streamid=__defaultVhost__/live/test?type=push`
|
||||
- ffmpeg 推流
|
||||
|
||||
`ffmpeg -re -stream_loop -1 -i test.ts -c:v copy -c:a copy -f mpegts srt://192.168.1.105:9000?streamid="__defaultVhost__/live/test?type=push"`
|
||||
- ffplay 拉流
|
||||
|
||||
`ffplay -i srt://192.168.1.105:9000?streamid=__defaultVhost__/live/test`
|
||||
|
||||
- vlc 不支持,因为无法指定streamid[参考](https://github.com/Haivision/srt/issues/1015)
|
||||
24
srt/srt_en.md
Normal file
24
srt/srt_en.md
Normal file
@ -0,0 +1,24 @@
|
||||
## feature
|
||||
- NACK support
|
||||
- listener support
|
||||
- push stream payload must ts
|
||||
- pull stream payload is ts
|
||||
- protocol impliment [reference](https://haivision.github.io/srt-rfc/draft-sharabayko-srt.html)
|
||||
- version support (>=1.3.0)
|
||||
- fec and encriyped not support
|
||||
|
||||
## usage
|
||||
|
||||
zlm get vhost,app,streamid and push or play by streamid of srt like this `<vhost>/<app>/<streamid>?type=<push|play>& <other>=<other>`
|
||||
|
||||
- OBS push stream url
|
||||
|
||||
`srt://192.168.1.105:9000?streamid=__defaultVhost__/live/test?type=push`
|
||||
- ffmpeg push
|
||||
|
||||
`ffmpeg -re -stream_loop -1 -i test.ts -c:v copy -c:a copy -f mpegts srt://192.168.1.105:9000?streamid="__defaultVhost__/live/test?type=push"`
|
||||
- ffplay pull
|
||||
|
||||
`ffplay -i srt://192.168.1.105:9000?streamid=__defaultVhost__/live/test`
|
||||
|
||||
- vlc not support ,because can't set stream id [reference](https://github.com/Haivision/srt/issues/1015)
|
||||
Loading…
Reference in New Issue
Block a user