Created the DtlsSrtpTransport.

pc/dtlssrtptransport_unittest.cc

+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "pc/dtlssrtptransport.h"
+
+#include <memory>
+#include <utility>
+
+#include "p2p/base/dtlstransportinternal.h"
+#include "p2p/base/fakedtlstransport.h"
+#include "p2p/base/fakepackettransport.h"
+#include "pc/rtptransport.h"
+#include "pc/rtptransporttestutil.h"
+#include "rtc_base/asyncpacketsocket.h"
+#include "rtc_base/gunit.h"
+#include "rtc_base/ptr_util.h"
+#include "rtc_base/sslstreamadapter.h"
+
+using cricket::FakeDtlsTransport;
+using cricket::FakeIceTransport;
+using webrtc::DtlsSrtpTransport;
+using webrtc::SrtpTransport;
+using webrtc::RtpTransport;
+
+class DtlsSrtpTransportTest : public testing::Test,
+                              public sigslot::has_slots<> {
+ protected:
+  DtlsSrtpTransportTest() {
+    bool rtcp_mux_enabled = true;
+    // Setup RtpTransport.
+    auto rtp_transport1 = rtc::MakeUnique<RtpTransport>(rtcp_mux_enabled);
+    auto rtp_transport2 = rtc::MakeUnique<RtpTransport>(rtcp_mux_enabled);
+    fake_ice_transport1_ =
+        rtc::MakeUnique<FakeIceTransport>("fake_ice_transport1", 1);
+    fake_ice_transport2_ =
+        rtc::MakeUnique<FakeIceTransport>("fake_ice_transport2", 1);
+
+    fake_dtls_transport1_ =
+        rtc::MakeUnique<FakeDtlsTransport>(fake_ice_transport1_.get());
+    fake_dtls_transport2_ =
+        rtc::MakeUnique<FakeDtlsTransport>(fake_ice_transport2_.get());
+    rtp_transport1->SetRtpPacketTransport(fake_dtls_transport1_.get());
+    rtp_transport2->SetRtpPacketTransport(fake_dtls_transport2_.get());
+    // Add payload type for RTP packet and RTCP packet.
+    rtp_transport1->AddHandledPayloadType(0x00);
+    rtp_transport2->AddHandledPayloadType(0x00);
+    rtp_transport1->AddHandledPayloadType(0xc9);
+    rtp_transport2->AddHandledPayloadType(0xc9);
+
+    // Setup the SrtpTransport wrapping an RtpTransport.
+    auto srtp_transport1 =
+        rtc::MakeUnique<SrtpTransport>(std::move(rtp_transport1), "content");
+    auto srtp_transport2 =
+        rtc::MakeUnique<SrtpTransport>(std::move(rtp_transport2), "content");
+
+    // Setup the DtlsSrtpTransport wrapping an SrtpTransport.
+    dtls_srtp_transport1_ =
+        rtc::MakeUnique<DtlsSrtpTransport>(std::move(srtp_transport1));
+    dtls_srtp_transport2_ =
+        rtc::MakeUnique<DtlsSrtpTransport>(std::move(srtp_transport2));
+    // Using RtcpMux.
+    dtls_srtp_transport1_->SetRtcpDtlsTransport(fake_dtls_transport1_.get());
+    dtls_srtp_transport1_->SetRtpDtlsTransport(fake_dtls_transport1_.get());
+    dtls_srtp_transport2_->SetRtcpDtlsTransport(fake_dtls_transport2_.get());
+    dtls_srtp_transport2_->SetRtpDtlsTransport(fake_dtls_transport2_.get());
+  }
+
+  std::unique_ptr<DtlsSrtpTransport> dtls_srtp_transport1_;
+  std::unique_ptr<DtlsSrtpTransport> dtls_srtp_transport2_;
+  std::unique_ptr<FakeDtlsTransport> fake_dtls_transport1_;
+  std::unique_ptr<FakeDtlsTransport> fake_dtls_transport2_;
+  std::unique_ptr<FakeIceTransport> fake_ice_transport1_;
+  std::unique_ptr<FakeIceTransport> fake_ice_transport2_;
+};
+
+TEST_F(DtlsSrtpTransportTest, SetupDtlsSrtp) {
+  // Setting certifications for DtlsTransport.
+  auto cert1 = rtc::RTCCertificate::Create(std::unique_ptr<rtc::SSLIdentity>(
+      rtc::SSLIdentity::Generate("session1", rtc::KT_DEFAULT)));
+  fake_dtls_transport1_->SetLocalCertificate(cert1);
+  auto cert2 = rtc::RTCCertificate::Create(std::unique_ptr<rtc::SSLIdentity>(
+      rtc::SSLIdentity::Generate("session1", rtc::KT_DEFAULT)));
+  fake_dtls_transport2_->SetLocalCertificate(cert2);
+  fake_dtls_transport1_->SetDestination(fake_dtls_transport2_.get());
+  bool rtcp = true;
+  EXPECT_TRUE(dtls_srtp_transport1_->SetupDtlsSrtp(rtcp));
+  EXPECT_TRUE(dtls_srtp_transport2_->SetupDtlsSrtp(rtcp));
+  EXPECT_TRUE(dtls_srtp_transport1_->SetupDtlsSrtp(!rtcp));
+  EXPECT_TRUE(dtls_srtp_transport2_->SetupDtlsSrtp(!rtcp));
+  EXPECT_TRUE(dtls_srtp_transport1_->IsActive());
+  EXPECT_TRUE(dtls_srtp_transport2_->IsActive());
+}

[Taylor Brandstetter, 2017/09/27 23:54:48]

Should also test sending some packets; this doesn't actually verify that the
keying material was extracted correctly, just that both sides *think* they're
working.