Use new TransportController implementation in PeerConnection.

The TransportController will be replaced by the JsepTransportController
and JsepTransport will be replace be JsepTransport2.

The JsepTransportController will take the entire SessionDescription
and handle the RtcpMux, Sdes and BUNDLE internally.

The ownership model is also changed. The P2P layer transports are not
ref-counted and will be owned by the JsepTransport2.

In ORTC aspect, RtpTransportAdapter is now a wrapper over RtpTransport
or SrtpTransport and it implements the public and internal interface
by calling the transport underneath.

Bug: webrtc:8587
Change-Id: Ia7fa61288a566f211f8560072ea0eecaf19e48df
Reviewed-on: https://webrtc-review.googlesource.com/59586
Commit-Queue: Zhi Huang <zhihuang@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22693}
diff --git a/pc/jseptransportcontroller_unittest.cc b/pc/jseptransportcontroller_unittest.cc
index 78f4986..73af35d 100644
--- a/pc/jseptransportcontroller_unittest.cc
+++ b/pc/jseptransportcontroller_unittest.cc
@@ -123,6 +123,8 @@
                        rtc::scoped_refptr<rtc::RTCCertificate> cert) {
     std::unique_ptr<cricket::AudioContentDescription> audio(
         new cricket::AudioContentDescription());
+    // Set RTCP-mux to be true because the default policy is "mux required".
+    audio->set_rtcp_mux(true);
     description->AddContent(mid, cricket::MediaProtocolType::kRtp,
                             /*rejected=*/false, audio.release());
     AddTransportInfo(description, mid, ufrag, pwd, ice_mode, conn_role, cert);
@@ -137,6 +139,8 @@
                        rtc::scoped_refptr<rtc::RTCCertificate> cert) {
     std::unique_ptr<cricket::VideoContentDescription> video(
         new cricket::VideoContentDescription());
+    // Set RTCP-mux to be true because the default policy is "mux required".
+    video->set_rtcp_mux(true);
     description->AddContent(mid, cricket::MediaProtocolType::kRtp,
                             /*rejected=*/false, video.release());
     AddTransportInfo(description, mid, ufrag, pwd, ice_mode, conn_role, cert);
@@ -152,6 +156,7 @@
                       rtc::scoped_refptr<rtc::RTCCertificate> cert) {
     std::unique_ptr<cricket::DataContentDescription> data(
         new cricket::DataContentDescription());
+    data->set_rtcp_mux(true);
     description->AddContent(mid, protocol_type,
                             /*rejected=*/false, data.release());
     AddTransportInfo(description, mid, ufrag, pwd, ice_mode, conn_role, cert);
@@ -325,6 +330,20 @@
   EXPECT_EQ(nullptr, transport_controller_->GetRtcpDtlsTransport(kVideoMid2));
 }
 
+TEST_F(JsepTransportControllerTest, GetDtlsTransportWithRtcpMux) {
+  JsepTransportController::Config config;
+  config.rtcp_mux_policy = PeerConnectionInterface::kRtcpMuxPolicyRequire;
+  CreateJsepTransportController(config);
+  auto description = CreateSessionDescriptionWithoutBundle();
+  EXPECT_TRUE(transport_controller_
+                  ->SetLocalDescription(SdpType::kOffer, description.get())
+                  .ok());
+  EXPECT_NE(nullptr, transport_controller_->GetDtlsTransport(kAudioMid1));
+  EXPECT_EQ(nullptr, transport_controller_->GetRtcpDtlsTransport(kAudioMid1));
+  EXPECT_NE(nullptr, transport_controller_->GetDtlsTransport(kVideoMid1));
+  EXPECT_EQ(nullptr, transport_controller_->GetRtcpDtlsTransport(kVideoMid1));
+}
+
 TEST_F(JsepTransportControllerTest, SetIceConfig) {
   CreateJsepTransportController(JsepTransportController::Config());
   auto description = CreateSessionDescriptionWithoutBundle();
@@ -1207,5 +1226,103 @@
                    ->SetRemoteDescription(SdpType::kAnswer, remote_answer.get())
                    .ok());
 }
+// Test that rejecting only the first m= section of a BUNDLE group is treated as
+// an error, but rejecting all of them works as expected.
+TEST_F(JsepTransportControllerTest, RejectFirstContentInBundleGroup) {
+  CreateJsepTransportController(JsepTransportController::Config());
+  cricket::ContentGroup bundle_group(cricket::GROUP_TYPE_BUNDLE);
+  bundle_group.AddContentName(kAudioMid1);
+  bundle_group.AddContentName(kVideoMid1);
+  bundle_group.AddContentName(kDataMid1);
+
+  auto local_offer = rtc::MakeUnique<cricket::SessionDescription>();
+  AddAudioSection(local_offer.get(), kAudioMid1, kIceUfrag1, kIcePwd1,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_ACTPASS,
+                  nullptr);
+  AddVideoSection(local_offer.get(), kVideoMid1, kIceUfrag2, kIcePwd2,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_ACTPASS,
+                  nullptr);
+  AddDataSection(local_offer.get(), kDataMid1,
+                 cricket::MediaProtocolType::kSctp, kIceUfrag3, kIcePwd3,
+                 cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_ACTPASS,
+                 nullptr);
+
+  auto remote_answer = rtc::MakeUnique<cricket::SessionDescription>();
+  AddAudioSection(remote_answer.get(), kAudioMid1, kIceUfrag1, kIcePwd1,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_PASSIVE,
+                  nullptr);
+  AddVideoSection(remote_answer.get(), kVideoMid1, kIceUfrag2, kIcePwd2,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_PASSIVE,
+                  nullptr);
+  AddDataSection(remote_answer.get(), kDataMid1,
+                 cricket::MediaProtocolType::kSctp, kIceUfrag3, kIcePwd3,
+                 cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_PASSIVE,
+                 nullptr);
+  // Reject audio content in answer.
+  remote_answer->contents()[0].rejected = true;
+
+  local_offer->AddGroup(bundle_group);
+  remote_answer->AddGroup(bundle_group);
+
+  EXPECT_TRUE(transport_controller_
+                  ->SetLocalDescription(SdpType::kOffer, local_offer.get())
+                  .ok());
+  EXPECT_FALSE(transport_controller_
+                   ->SetRemoteDescription(SdpType::kAnswer, remote_answer.get())
+                   .ok());
+
+  // Reject all the contents.
+  remote_answer->contents()[1].rejected = true;
+  remote_answer->contents()[2].rejected = true;
+  EXPECT_TRUE(transport_controller_
+                  ->SetRemoteDescription(SdpType::kAnswer, remote_answer.get())
+                  .ok());
+  EXPECT_EQ(nullptr, transport_controller_->GetRtpTransport(kAudioMid1));
+  EXPECT_EQ(nullptr, transport_controller_->GetRtpTransport(kVideoMid1));
+  EXPECT_EQ(nullptr, transport_controller_->GetDtlsTransport(kDataMid1));
+}
+
+// Tests that applying non-RTCP-mux offer would fail when kRtcpMuxPolicyRequire
+// is used.
+TEST_F(JsepTransportControllerTest, ApplyNonRtcpMuxOfferWhenMuxingRequired) {
+  JsepTransportController::Config config;
+  config.rtcp_mux_policy = PeerConnectionInterface::kRtcpMuxPolicyRequire;
+  CreateJsepTransportController(config);
+  auto local_offer = rtc::MakeUnique<cricket::SessionDescription>();
+  AddAudioSection(local_offer.get(), kAudioMid1, kIceUfrag1, kIcePwd1,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_ACTPASS,
+                  nullptr);
+
+  local_offer->contents()[0].media_description()->set_rtcp_mux(false);
+  // Applying a non-RTCP-mux offer is expected to fail.
+  EXPECT_FALSE(transport_controller_
+                   ->SetLocalDescription(SdpType::kOffer, local_offer.get())
+                   .ok());
+}
+
+// Tests that applying non-RTCP-mux answer would fail when kRtcpMuxPolicyRequire
+// is used.
+TEST_F(JsepTransportControllerTest, ApplyNonRtcpMuxAnswerWhenMuxingRequired) {
+  JsepTransportController::Config config;
+  config.rtcp_mux_policy = PeerConnectionInterface::kRtcpMuxPolicyRequire;
+  CreateJsepTransportController(config);
+  auto local_offer = rtc::MakeUnique<cricket::SessionDescription>();
+  AddAudioSection(local_offer.get(), kAudioMid1, kIceUfrag1, kIcePwd1,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_ACTPASS,
+                  nullptr);
+  EXPECT_TRUE(transport_controller_
+                  ->SetLocalDescription(SdpType::kOffer, local_offer.get())
+                  .ok());
+
+  auto remote_answer = rtc::MakeUnique<cricket::SessionDescription>();
+  AddAudioSection(remote_answer.get(), kAudioMid1, kIceUfrag1, kIcePwd1,
+                  cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_PASSIVE,
+                  nullptr);
+  // Applying a non-RTCP-mux answer is expected to fail.
+  remote_answer->contents()[0].media_description()->set_rtcp_mux(false);
+  EXPECT_FALSE(transport_controller_
+                   ->SetRemoteDescription(SdpType::kAnswer, remote_answer.get())
+                   .ok());
+}
 
 }  // namespace webrtc