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整理代码

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This commit is contained in:
ziyue
2021-04-02 17:08:11 +08:00
parent 33d2e71368
commit 7110dc75ae
4 changed files with 142 additions and 107 deletions
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132
webrtc/WebRtcTransport.cpp
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@@ -3,19 +3,19 @@
#include "Rtcp/Rtcp.h"
WebRtcTransport::WebRtcTransport(const EventPoller::Ptr &poller) {
dtls_transport_ = std::make_shared<RTC::DtlsTransport>(poller, this);
ice_server_ = std::make_shared<RTC::IceServer>(this, makeRandStr(4), makeRandStr(24));
_dtls_transport = std::make_shared<RTC::DtlsTransport>(poller, this);
_ice_server = std::make_shared<RTC::IceServer>(this, makeRandStr(4), makeRandStr(24));
}
void WebRtcTransport::onDestory(){
dtls_transport_ = nullptr;
ice_server_ = nullptr;
_dtls_transport = nullptr;
_ice_server = nullptr;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void WebRtcTransport::OnIceServerSendStunPacket(const RTC::IceServer *iceServer, const RTC::StunPacket *packet, RTC::TransportTuple *tuple) {
onWrite((char *)packet->GetData(), packet->GetSize(), (struct sockaddr_in *)tuple);
onSendSockData((char *) packet->GetData(), packet->GetSize(), (struct sockaddr_in *) tuple);
}
void WebRtcTransport::OnIceServerSelectedTuple(const RTC::IceServer *iceServer, RTC::TransportTuple *tuple) {
@@ -29,9 +29,9 @@ void WebRtcTransport::OnIceServerConnected(const RTC::IceServer *iceServer) {
void WebRtcTransport::OnIceServerCompleted(const RTC::IceServer *iceServer) {
InfoL;
if (_answer_sdp->media[0].role == DtlsRole::passive) {
dtls_transport_->Run(RTC::DtlsTransport::Role::SERVER);
_dtls_transport->Run(RTC::DtlsTransport::Role::SERVER);
} else {
dtls_transport_->Run(RTC::DtlsTransport::Role::CLIENT);
_dtls_transport->Run(RTC::DtlsTransport::Role::CLIENT);
}
}
@@ -50,21 +50,21 @@ void WebRtcTransport::OnDtlsTransportConnected(
size_t srtpRemoteKeyLen,
std::string &remoteCert) {
InfoL;
srtp_session_ = std::make_shared<RTC::SrtpSession>(RTC::SrtpSession::Type::OUTBOUND, srtpCryptoSuite, srtpLocalKey, srtpLocalKeyLen);
srtp_session_recv_ = std::make_shared<RTC::SrtpSession>(RTC::SrtpSession::Type::OUTBOUND, srtpCryptoSuite, srtpRemoteKey, srtpRemoteKeyLen);
onDtlsConnected();
_srtp_session_send = std::make_shared<RTC::SrtpSession>(RTC::SrtpSession::Type::OUTBOUND, srtpCryptoSuite, srtpLocalKey, srtpLocalKeyLen);
_srtp_session_recv = std::make_shared<RTC::SrtpSession>(RTC::SrtpSession::Type::OUTBOUND, srtpCryptoSuite, srtpRemoteKey, srtpRemoteKeyLen);
onStartWebRTC();
}
void WebRtcTransport::OnDtlsTransportSendData(const RTC::DtlsTransport *dtlsTransport, const uint8_t *data, size_t len) {
onWrite((char *)data, len);
onSendSockData((char *)data, len);
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void WebRtcTransport::onWrite(const char *buf, size_t len){
auto tuple = ice_server_->GetSelectedTuple();
void WebRtcTransport::onSendSockData(const char *buf, size_t len){
auto tuple = _ice_server->GetSelectedTuple();
assert(tuple);
onWrite(buf, len, (struct sockaddr_in *)tuple);
onSendSockData(buf, len, (struct sockaddr_in *) tuple);
}
string getFingerprint(const string &algorithm_str, const std::shared_ptr<RTC::DtlsTransport> &transport){
@@ -77,46 +77,47 @@ string getFingerprint(const string &algorithm_str, const std::shared_ptr<RTC::Dt
throw std::invalid_argument(StrPrinter << "不支持的加密算法:" << algorithm_str);
}
std::string WebRtcTransport::getAnswerSdp(const string &offer){
// InfoL << offer;
_offer_sdp = std::make_shared<RtcSession>();
_offer_sdp->loadFrom(offer);
SdpAttrFingerprint fingerprint;
fingerprint.algorithm = _offer_sdp->media[0].fingerprint.algorithm;
fingerprint.hash = getFingerprint(fingerprint.algorithm, dtls_transport_);
RtcConfigure configure;
configure.setDefaultSetting(ice_server_->GetUsernameFragment(), ice_server_->GetPassword(), RtpDirection::recvonly, fingerprint);
SdpAttrCandidate candidate;
candidate.foundation = "udpcandidate";
candidate.component = 1;
candidate.transport = "udp";
candidate.priority = getSSRC();
candidate.address = getIP();
candidate.port = getPort();
candidate.type = "host";
configure.addCandidate(candidate);
_answer_sdp = configure.createAnswer(*_offer_sdp);
void WebRtcTransport::setRemoteDtlsFingerprint(const RtcSession &remote){
//设置远端dtls签名
RTC::DtlsTransport::Fingerprint remote_fingerprint;
remote_fingerprint.algorithm = RTC::DtlsTransport::GetFingerprintAlgorithm(_offer_sdp->media[0].fingerprint.algorithm);
remote_fingerprint.value = _offer_sdp->media[0].fingerprint.hash;
dtls_transport_->SetRemoteFingerprint(remote_fingerprint);
_dtls_transport->SetRemoteFingerprint(remote_fingerprint);
}
if (!_offer_sdp->group.mids.empty()) {
for (auto &m : _answer_sdp->media) {
_answer_sdp->group.mids.emplace_back(m.mid);
void WebRtcTransport::onCheckSdp(SdpType type, const RtcSession &sdp) const{
for (auto &m : sdp.media) {
if (m.type != TrackApplication && !m.rtcp_mux) {
throw std::invalid_argument("只支持rtcp-mux模式");
}
} else {
throw std::invalid_argument("支持group BUNDLE模式");
}
if (sdp.group.mids.empty()) {
throw std::invalid_argument("只支持group BUNDLE模式");
}
}
std::string WebRtcTransport::getAnswerSdp(const string &offer){
//// 解析offer sdp ////
_offer_sdp = std::make_shared<RtcSession>();
_offer_sdp->loadFrom(offer);
onCheckSdp(SdpType::offer, *_offer_sdp);
setRemoteDtlsFingerprint(*_offer_sdp);
//// sdp 配置 ////
SdpAttrFingerprint fingerprint;
fingerprint.algorithm = _offer_sdp->media[0].fingerprint.algorithm;
fingerprint.hash = getFingerprint(fingerprint.algorithm, _dtls_transport);
RtcConfigure configure;
configure.setDefaultSetting(_ice_server->GetUsernameFragment(), _ice_server->GetPassword(), RtpDirection::recvonly, fingerprint);
configure.addCandidate(*getIceCandidate());
onRtcConfigure(configure);
//// 生成answer sdp ////
_answer_sdp = configure.createAnswer(*_offer_sdp);
onCheckSdp(SdpType::answer, *_answer_sdp);
auto str = _answer_sdp->toString();
InfoL << "\r\n" << str;
TraceL << "\r\n" << str;
return str;
}
@@ -134,18 +135,18 @@ bool is_rtcp(char *buf) {
return ((header->pt >= 64) && (header->pt < 96));
}
void WebRtcTransport::OnInputDataPacket(char *buf, size_t len, RTC::TransportTuple *tuple) {
void WebRtcTransport::inputSockData(char *buf, size_t len, RTC::TransportTuple *tuple) {
if (RTC::StunPacket::IsStun((const uint8_t *) buf, len)) {
RTC::StunPacket *packet = RTC::StunPacket::Parse((const uint8_t *) buf, len);
if (packet == nullptr) {
WarnL << "parse stun error" << std::endl;
return;
}
ice_server_->ProcessStunPacket(packet, tuple);
_ice_server->ProcessStunPacket(packet, tuple);
return;
}
if (is_dtls(buf)) {
dtls_transport_->ProcessDtlsData((uint8_t *) buf, len);
_dtls_transport->ProcessDtlsData((uint8_t *) buf, len);
return;
}
if (is_rtp(buf)) {
@@ -158,14 +159,14 @@ void WebRtcTransport::OnInputDataPacket(char *buf, size_t len, RTC::TransportTup
}
}
void WebRtcTransport::WritRtpPacket(char *buf, size_t len) {
void WebRtcTransport::sendRtpPacket(char *buf, size_t len) {
const uint8_t *p = (uint8_t *) buf;
bool ret = false;
if (srtp_session_) {
ret = srtp_session_->EncryptRtp(&p, &len);
if (_srtp_session_send) {
ret = _srtp_session_send->EncryptRtp(&p, &len);
}
if (ret) {
onWrite((char *) p, len);
onSendSockData((char *) p, len);
}
}
@@ -183,7 +184,7 @@ WebRtcTransportImp::WebRtcTransportImp(const EventPoller::Ptr &poller) : WebRtcT
//随机端口，绑定全部网卡
_socket->bindUdpSock(0);
_socket->setOnRead([this](const Buffer::Ptr &buf, struct sockaddr *addr, int addr_len) mutable {
OnInputDataPacket(buf->data(), buf->size(), addr);
inputSockData(buf->data(), buf->size(), addr);
});
}
@@ -196,7 +197,7 @@ void WebRtcTransportImp::attach(const RtspMediaSource::Ptr &src) {
_src = src;
}
void WebRtcTransportImp::onDtlsConnected() {
void WebRtcTransportImp::onStartWebRTC() {
_reader = _src->getRing()->attach(_socket->getPoller(), true);
weak_ptr<WebRtcTransportImp> weak_self = shared_from_this();
_reader->setReadCB([weak_self](const RtspMediaSource::RingDataType &pkt){
@@ -207,14 +208,14 @@ void WebRtcTransportImp::onDtlsConnected() {
pkt->for_each([&](const RtpPacket::Ptr &rtp) {
if(rtp->type == TrackVideo) {
//目前只支持视频
strongSelf->WritRtpPacket(rtp->data() + RtpPacket::kRtpTcpHeaderSize,
strongSelf->sendRtpPacket(rtp->data() + RtpPacket::kRtpTcpHeaderSize,
rtp->size() - RtpPacket::kRtpTcpHeaderSize);
}
});
});
}
void WebRtcTransportImp::onWrite(const char *buf, size_t len, struct sockaddr_in *dst) {
void WebRtcTransportImp::onSendSockData(const char *buf, size_t len, struct sockaddr_in *dst) {
auto ptr = BufferRaw::create();
ptr->assign(buf, len);
_socket->send(ptr, (struct sockaddr *)(dst), sizeof(struct sockaddr));
@@ -224,13 +225,6 @@ uint32_t WebRtcTransportImp::getSSRC() const {
return _src->getSsrc(TrackVideo);
}
int WebRtcTransportImp::getPayloadType() const{
auto sdp = SdpParser(_src->getSdp());
auto track = sdp.getTrack(TrackVideo);
assert(track);
return track ? track->_pt : 0;
}
uint16_t WebRtcTransportImp::getPort() const {
//todo udp端口号应该与外网映射端口相同
return _socket->get_local_port();
@@ -241,6 +235,18 @@ std::string WebRtcTransportImp::getIP() const {
return SockUtil::get_local_ip();
}
SdpAttrCandidate::Ptr WebRtcTransportImp::getIceCandidate() const{
auto candidate = std::make_shared<SdpAttrCandidate>();
candidate->foundation = "udpcandidate";
candidate->component = 1;
candidate->transport = "udp";
candidate->priority = 100;
candidate->address = getIP();
candidate->port = getPort();
candidate->type = "host";
return candidate;
}
///////////////////////////////////////////////////////////////////