FAQ

Abstract	FAQ
Authors	Walter Fan
Status	WIP
Updated	2024-08-21

How to disable SRTP?

以 WebRTC 所带的 peerconnection_client 例程

webrtc::PeerConnectionFactoryInterface::Options options;
options.disable_encryption = this->disable_srtp_;
peer_connection_factory_->SetOptions(options);

step 1

change C:webrtc-checkoutsrcexamplespeerconnectionclientflag_defs.h

ABSL_FLAG(bool, disable_srtp, false, "disable srtp or not: false-enable srtp, true-disable srtp");

step 2

change C:webrtc-checkoutsrcexamplespeerconnectionclientconductor.h

class Conductor : public webrtc::PeerConnectionObserver,
                public webrtc::CreateSessionDescriptionObserver,
                public PeerConnectionClientObserver,
                public MainWndCallback {
public:
void DisableSrtp(bool flag);

bool disable_srtp_;
};


void Conductor::DisableSrtp(bool flag) {
this->disable_srtp_ = flag;
}

step 3

change C:webrtc-checkoutsrcexamplespeerconnectionclientconductor.cc

bool Conductor::InitializePeerConnection() {
RTC_DCHECK(!peer_connection_factory_);
RTC_DCHECK(!peer_connection_);

if (!signaling_thread_.get()) {
    signaling_thread_ = rtc::Thread::CreateWithSocketServer();
    signaling_thread_->Start();
}
peer_connection_factory_ = webrtc::CreatePeerConnectionFactory(
    nullptr /* network_thread */, nullptr /* worker_thread */,
    signaling_thread_.get(), nullptr /* default_adm */,
    webrtc::CreateBuiltinAudioEncoderFactory(),
    webrtc::CreateBuiltinAudioDecoderFactory(),
    webrtc::CreateBuiltinVideoEncoderFactory(),
    webrtc::CreateBuiltinVideoDecoderFactory(), nullptr /* audio_mixer */,
    nullptr /* audio_processing */);

if (!peer_connection_factory_) {
    main_wnd_->MessageBox("Error", "Failed to initialize PeerConnectionFactory",
                        true);
    DeletePeerConnection();
    return false;
}

webrtc::PeerConnectionFactoryInterface::Options options;
options.disable_encryption = this->disable_srtp_;
peer_connection_factory_->SetOptions(options);

if (!CreatePeerConnection()) {
    main_wnd_->MessageBox("Error", "CreatePeerConnection failed", true);
    DeletePeerConnection();
}

if (videoSourceType_ != VideoSourceType::NOSEND) {
    AddTracks();
} else {
    main_wnd_->SwitchToStreamingUI();
}

return peer_connection_ != nullptr;
}

Step 4

change C:webrtc-checkoutsrcexamplespeerconnectionclientmain.cc

bool disable_srtp = absl::GetFlag(FLAGS_disable_srtp);
conductor->DisableSrtp(disable_srtp);