mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-10-06 12:13:49 +08:00
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT 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 "WebRtcSession.h"
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#include "Util/util.h"
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WebRtcSession::WebRtcSession(const Socket::Ptr &sock) : UdpSession(sock) {
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socklen_t addr_len = sizeof(_peer_addr);
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getpeername(sock->rawFD(), &_peer_addr, &addr_len);
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InfoP(this);
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}
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WebRtcSession::~WebRtcSession() {
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InfoP(this);
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}
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static string getUserName(const Buffer::Ptr &buffer) {
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auto buf = buffer->data();
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auto len = buffer->size();
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if (!RTC::StunPacket::IsStun((const uint8_t *) buf, len)) {
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return "";
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}
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std::unique_ptr<RTC::StunPacket> packet(RTC::StunPacket::Parse((const uint8_t *) buf, len));
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if (!packet) {
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return "";
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}
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if (packet->GetClass() != RTC::StunPacket::Class::REQUEST ||
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packet->GetMethod() != RTC::StunPacket::Method::BINDING) {
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return "";
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}
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//收到binding request请求
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auto vec = split(packet->GetUsername(), ":");
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return vec[0];
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}
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EventPoller::Ptr WebRtcSession::getPoller(const Buffer::Ptr &buffer) {
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auto user_name = getUserName(buffer);
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if (user_name.empty()) {
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return nullptr;
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}
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auto ret = WebRtcTransportImp::getRtcTransport(user_name, false);
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return ret ? ret->getPoller() : nullptr;
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}
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void WebRtcSession::onRecv(const Buffer::Ptr &buffer) {
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try {
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onRecv_l(buffer);
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} catch (std::exception &ex) {
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shutdown(SockException(Err_shutdown, ex.what()));
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}
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}
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void WebRtcSession::onRecv_l(const Buffer::Ptr &buffer) {
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if (_find_transport) {
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//只允许寻找一次transport
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_find_transport = false;
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_transport = WebRtcTransportImp::getRtcTransport(getUserName(buffer), true);
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CHECK(_transport && _transport->getPoller()->isCurrentThread());
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_transport->setSession(shared_from_this());
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}
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_ticker.resetTime();
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CHECK(_transport);
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//先增加引用技术，防止使用transport时，触发onError事件导致对象释放
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auto transport = _transport;
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transport->inputSockData(buffer->data(), buffer->size(), &_peer_addr);
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}
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void WebRtcSession::onError(const SockException &err) {
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//udp链接超时，但是rtc链接不一定超时，因为可能存在udp链接迁移的情况
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//在udp链接迁移时，新的WebRtcSession对象将接管WebRtcTransport对象的生命周期
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//本WebRtcSession对象将在超时后自动销毁
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WarnP(this) << err.what();
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//取消循环引用
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_transport = nullptr;
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}
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void WebRtcSession::onManager() {
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GET_CONFIG(float, timeoutSec, RTC::kTimeOutSec);
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if (!_transport && _ticker.createdTime() > timeoutSec * 1000) {
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shutdown(SockException(Err_timeout, "illegal webrtc connection"));
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return;
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}
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if (_ticker.elapsedTime() > timeoutSec * 1000) {
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shutdown(SockException(Err_timeout, "webrtc connection timeout"));
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return;
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}
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}
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