121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include <cstdlib>
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#include "RtspSplitter.h"
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#include "Util/util.h"
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#include "Util/logger.h"
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#include "Common/macros.h"
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#include "Rtsp/RtpReceiver.h"
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using namespace std;
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using namespace toolkit;
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namespace mediakit{
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const char *RtspSplitter::onSearchPacketTail(const char *data, size_t len) {
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auto ret = onSearchPacketTail_l(data, len);
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if(ret){
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return ret;
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}
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if (len > 256 * 1024) {
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// rtp大于256KB [AUTO-TRANSLATED:d8d8a481]
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// rtp is greater than 256KB
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ret = (char *) memchr(data, '$', len);
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if (!ret) {
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WarnL << "rtp缓存溢出:" << hexdump(data, 1024);
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reset();
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}
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}
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return ret;
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}
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const char *RtspSplitter::onSearchPacketTail_l(const char *data, size_t len) {
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if(!_enableRecvRtp || data[0] != '$'){
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// 这是rtsp包 [AUTO-TRANSLATED:cdc2211d]
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// This is an rtsp packet
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_isRtpPacket = false;
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return HttpRequestSplitter::onSearchPacketTail(data, len);
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}
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// 这是rtp包 [AUTO-TRANSLATED:627d4881]
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// This is an rtp packet
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if(len < 4){
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// 数据不够 [AUTO-TRANSLATED:72802244]
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// Not enough data
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return nullptr;
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}
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uint16_t length = (((uint8_t *)data)[2] << 8) | ((uint8_t *)data)[3];
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if(len < (size_t)(length + 4)){
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// 数据不够 [AUTO-TRANSLATED:72802244]
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// Not enough data
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return nullptr;
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}
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// 返回rtp包末尾 [AUTO-TRANSLATED:2546d5ce]
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// Return the end of the rtp packet
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_isRtpPacket = true;
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return data + 4 + length;
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}
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ssize_t RtspSplitter::onRecvHeader(const char *data, size_t len) {
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if (_isRtpPacket) {
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try {
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onRtpPacket(data, len);
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} catch (RtpTrack::BadRtpException &ex) {
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WarnL << ex.what();
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}
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return 0;
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}
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if (len == 4 && !memcmp(data, "\r\n\r\n", 4)) {
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return 0;
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}
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try {
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_parser.parse(data, len);
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} catch (toolkit::AssertFailedException &ex){
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if (!_enableRecvRtp) {
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// 还在握手中，直接中断握手 [AUTO-TRANSLATED:19dfdf7a]
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// Still in handshake, interrupt handshake directly
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throw;
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}
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// 握手已经结束，如果rtsp server存在发送缓存溢出的bug，那么rtsp信令可能跟rtp混在一起 [AUTO-TRANSLATED:56c28270]
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// Handshake has ended, if rtsp server has a send buffer overflow bug, then rtsp signaling may be mixed with rtp
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// 这种情况下，rtsp信令解析异常不中断链接，只丢弃这个包 [AUTO-TRANSLATED:93cd60b4]
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// In this case, rtsp signaling parsing exception does not interrupt the connection, just discard this packet
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WarnL << ex.what();
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return 0;
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}
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auto ret = getContentLength(_parser);
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if (ret == 0) {
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onWholeRtspPacket(_parser);
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_parser.clear();
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}
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return ret;
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}
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void RtspSplitter::onRecvContent(const char *data, size_t len) {
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_parser.setContent(string(data,len));
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onWholeRtspPacket(_parser);
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_parser.clear();
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}
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void RtspSplitter::enableRecvRtp(bool enable) {
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_enableRecvRtp = enable;
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}
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ssize_t RtspSplitter::getContentLength(Parser &parser) {
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return atoi(parser["Content-Length"].data());
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}
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}//namespace mediakit
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