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567 lines
26 KiB
567 lines
26 KiB
4 months ago
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/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "pc/dtls_srtp_transport.h"
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#include <string.h>
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#include <cstdint>
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#include <memory>
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#include <set>
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#include "call/rtp_demuxer.h"
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#include "media/base/fake_rtp.h"
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#include "p2p/base/dtls_transport_internal.h"
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#include "p2p/base/fake_dtls_transport.h"
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#include "p2p/base/fake_ice_transport.h"
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#include "p2p/base/p2p_constants.h"
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#include "pc/rtp_transport.h"
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#include "pc/test/rtp_transport_test_util.h"
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#include "rtc_base/async_packet_socket.h"
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#include "rtc_base/byte_order.h"
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#include "rtc_base/copy_on_write_buffer.h"
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#include "rtc_base/rtc_certificate.h"
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#include "rtc_base/ssl_identity.h"
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#include "test/gtest.h"
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using cricket::FakeDtlsTransport;
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using cricket::FakeIceTransport;
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using webrtc::DtlsSrtpTransport;
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using webrtc::RtpTransport;
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using webrtc::SrtpTransport;
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const int kRtpAuthTagLen = 10;
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class DtlsSrtpTransportTest : public ::testing::Test,
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public sigslot::has_slots<> {
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protected:
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DtlsSrtpTransportTest() {}
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~DtlsSrtpTransportTest() {
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if (dtls_srtp_transport1_) {
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dtls_srtp_transport1_->UnregisterRtpDemuxerSink(&transport_observer1_);
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}
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if (dtls_srtp_transport2_) {
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dtls_srtp_transport2_->UnregisterRtpDemuxerSink(&transport_observer2_);
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}
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}
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std::unique_ptr<DtlsSrtpTransport> MakeDtlsSrtpTransport(
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FakeDtlsTransport* rtp_dtls,
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FakeDtlsTransport* rtcp_dtls,
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bool rtcp_mux_enabled) {
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auto dtls_srtp_transport =
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std::make_unique<DtlsSrtpTransport>(rtcp_mux_enabled);
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dtls_srtp_transport->SetDtlsTransports(rtp_dtls, rtcp_dtls);
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return dtls_srtp_transport;
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}
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void MakeDtlsSrtpTransports(FakeDtlsTransport* rtp_dtls1,
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FakeDtlsTransport* rtcp_dtls1,
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FakeDtlsTransport* rtp_dtls2,
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FakeDtlsTransport* rtcp_dtls2,
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bool rtcp_mux_enabled) {
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dtls_srtp_transport1_ =
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MakeDtlsSrtpTransport(rtp_dtls1, rtcp_dtls1, rtcp_mux_enabled);
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dtls_srtp_transport2_ =
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MakeDtlsSrtpTransport(rtp_dtls2, rtcp_dtls2, rtcp_mux_enabled);
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dtls_srtp_transport1_->SignalRtcpPacketReceived.connect(
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&transport_observer1_,
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&webrtc::TransportObserver::OnRtcpPacketReceived);
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dtls_srtp_transport1_->SignalReadyToSend.connect(
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&transport_observer1_, &webrtc::TransportObserver::OnReadyToSend);
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dtls_srtp_transport2_->SignalRtcpPacketReceived.connect(
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&transport_observer2_,
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&webrtc::TransportObserver::OnRtcpPacketReceived);
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dtls_srtp_transport2_->SignalReadyToSend.connect(
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&transport_observer2_, &webrtc::TransportObserver::OnReadyToSend);
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webrtc::RtpDemuxerCriteria demuxer_criteria;
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// 0x00 is the payload type used in kPcmuFrame.
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demuxer_criteria.payload_types = {0x00};
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dtls_srtp_transport1_->RegisterRtpDemuxerSink(demuxer_criteria,
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&transport_observer1_);
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dtls_srtp_transport2_->RegisterRtpDemuxerSink(demuxer_criteria,
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&transport_observer2_);
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}
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void CompleteDtlsHandshake(FakeDtlsTransport* fake_dtls1,
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FakeDtlsTransport* fake_dtls2) {
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auto cert1 = rtc::RTCCertificate::Create(
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rtc::SSLIdentity::Create("session1", rtc::KT_DEFAULT));
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fake_dtls1->SetLocalCertificate(cert1);
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auto cert2 = rtc::RTCCertificate::Create(
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rtc::SSLIdentity::Create("session1", rtc::KT_DEFAULT));
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fake_dtls2->SetLocalCertificate(cert2);
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fake_dtls1->SetDestination(fake_dtls2);
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}
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void SendRecvRtpPackets() {
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ASSERT_TRUE(dtls_srtp_transport1_);
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ASSERT_TRUE(dtls_srtp_transport2_);
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ASSERT_TRUE(dtls_srtp_transport1_->IsSrtpActive());
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ASSERT_TRUE(dtls_srtp_transport2_->IsSrtpActive());
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size_t rtp_len = sizeof(kPcmuFrame);
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size_t packet_size = rtp_len + kRtpAuthTagLen;
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rtc::Buffer rtp_packet_buffer(packet_size);
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char* rtp_packet_data = rtp_packet_buffer.data<char>();
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memcpy(rtp_packet_data, kPcmuFrame, rtp_len);
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// In order to be able to run this test function multiple times we can not
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// use the same sequence number twice. Increase the sequence number by one.
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rtc::SetBE16(reinterpret_cast<uint8_t*>(rtp_packet_data) + 2,
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++sequence_number_);
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rtc::CopyOnWriteBuffer rtp_packet1to2(rtp_packet_data, rtp_len,
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packet_size);
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rtc::CopyOnWriteBuffer rtp_packet2to1(rtp_packet_data, rtp_len,
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packet_size);
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rtc::PacketOptions options;
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// Send a packet from |srtp_transport1_| to |srtp_transport2_| and verify
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// that the packet can be successfully received and decrypted.
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int prev_received_packets = transport_observer2_.rtp_count();
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ASSERT_TRUE(dtls_srtp_transport1_->SendRtpPacket(&rtp_packet1to2, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer2_.last_recv_rtp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer2_.last_recv_rtp_packet().data(),
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kPcmuFrame, rtp_len));
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EXPECT_EQ(prev_received_packets + 1, transport_observer2_.rtp_count());
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prev_received_packets = transport_observer1_.rtp_count();
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ASSERT_TRUE(dtls_srtp_transport2_->SendRtpPacket(&rtp_packet2to1, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer1_.last_recv_rtp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer1_.last_recv_rtp_packet().data(),
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kPcmuFrame, rtp_len));
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EXPECT_EQ(prev_received_packets + 1, transport_observer1_.rtp_count());
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}
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void SendRecvRtcpPackets() {
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size_t rtcp_len = sizeof(kRtcpReport);
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size_t packet_size = rtcp_len + 4 + kRtpAuthTagLen;
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rtc::Buffer rtcp_packet_buffer(packet_size);
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// TODO(zhihuang): Remove the extra copy when the SendRtpPacket method
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// doesn't take the CopyOnWriteBuffer by pointer.
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rtc::CopyOnWriteBuffer rtcp_packet1to2(kRtcpReport, rtcp_len, packet_size);
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rtc::CopyOnWriteBuffer rtcp_packet2to1(kRtcpReport, rtcp_len, packet_size);
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rtc::PacketOptions options;
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// Send a packet from |srtp_transport1_| to |srtp_transport2_| and verify
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// that the packet can be successfully received and decrypted.
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int prev_received_packets = transport_observer2_.rtcp_count();
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ASSERT_TRUE(dtls_srtp_transport1_->SendRtcpPacket(&rtcp_packet1to2, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer2_.last_recv_rtcp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer2_.last_recv_rtcp_packet().data(),
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kRtcpReport, rtcp_len));
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EXPECT_EQ(prev_received_packets + 1, transport_observer2_.rtcp_count());
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// Do the same thing in the opposite direction;
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prev_received_packets = transport_observer1_.rtcp_count();
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ASSERT_TRUE(dtls_srtp_transport2_->SendRtcpPacket(&rtcp_packet2to1, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer1_.last_recv_rtcp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer1_.last_recv_rtcp_packet().data(),
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kRtcpReport, rtcp_len));
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EXPECT_EQ(prev_received_packets + 1, transport_observer1_.rtcp_count());
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}
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void SendRecvRtpPacketsWithHeaderExtension(
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const std::vector<int>& encrypted_header_ids) {
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ASSERT_TRUE(dtls_srtp_transport1_);
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ASSERT_TRUE(dtls_srtp_transport2_);
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ASSERT_TRUE(dtls_srtp_transport1_->IsSrtpActive());
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ASSERT_TRUE(dtls_srtp_transport2_->IsSrtpActive());
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size_t rtp_len = sizeof(kPcmuFrameWithExtensions);
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size_t packet_size = rtp_len + kRtpAuthTagLen;
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rtc::Buffer rtp_packet_buffer(packet_size);
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char* rtp_packet_data = rtp_packet_buffer.data<char>();
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memcpy(rtp_packet_data, kPcmuFrameWithExtensions, rtp_len);
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// In order to be able to run this test function multiple times we can not
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// use the same sequence number twice. Increase the sequence number by one.
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rtc::SetBE16(reinterpret_cast<uint8_t*>(rtp_packet_data) + 2,
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++sequence_number_);
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rtc::CopyOnWriteBuffer rtp_packet1to2(rtp_packet_data, rtp_len,
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packet_size);
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rtc::CopyOnWriteBuffer rtp_packet2to1(rtp_packet_data, rtp_len,
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packet_size);
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char original_rtp_data[sizeof(kPcmuFrameWithExtensions)];
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memcpy(original_rtp_data, rtp_packet_data, rtp_len);
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rtc::PacketOptions options;
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// Send a packet from |srtp_transport1_| to |srtp_transport2_| and verify
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// that the packet can be successfully received and decrypted.
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ASSERT_TRUE(dtls_srtp_transport1_->SendRtpPacket(&rtp_packet1to2, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer2_.last_recv_rtp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer2_.last_recv_rtp_packet().data(),
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original_rtp_data, rtp_len));
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// Get the encrypted packet from underneath packet transport and verify the
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// data and header extension are actually encrypted.
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auto fake_dtls_transport = static_cast<FakeDtlsTransport*>(
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dtls_srtp_transport1_->rtp_packet_transport());
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auto fake_ice_transport =
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static_cast<FakeIceTransport*>(fake_dtls_transport->ice_transport());
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EXPECT_NE(0, memcmp(fake_ice_transport->last_sent_packet().data(),
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original_rtp_data, rtp_len));
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CompareHeaderExtensions(reinterpret_cast<const char*>(
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fake_ice_transport->last_sent_packet().data()),
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fake_ice_transport->last_sent_packet().size(),
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original_rtp_data, rtp_len, encrypted_header_ids,
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false);
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// Do the same thing in the opposite direction.
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ASSERT_TRUE(dtls_srtp_transport2_->SendRtpPacket(&rtp_packet2to1, options,
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cricket::PF_SRTP_BYPASS));
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ASSERT_TRUE(transport_observer1_.last_recv_rtp_packet().data());
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EXPECT_EQ(0, memcmp(transport_observer1_.last_recv_rtp_packet().data(),
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original_rtp_data, rtp_len));
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// Get the encrypted packet from underneath packet transport and verify the
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// data and header extension are actually encrypted.
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fake_dtls_transport = static_cast<FakeDtlsTransport*>(
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dtls_srtp_transport2_->rtp_packet_transport());
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fake_ice_transport =
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static_cast<FakeIceTransport*>(fake_dtls_transport->ice_transport());
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EXPECT_NE(0, memcmp(fake_ice_transport->last_sent_packet().data(),
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original_rtp_data, rtp_len));
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CompareHeaderExtensions(reinterpret_cast<const char*>(
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fake_ice_transport->last_sent_packet().data()),
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fake_ice_transport->last_sent_packet().size(),
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original_rtp_data, rtp_len, encrypted_header_ids,
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false);
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}
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void SendRecvPackets() {
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SendRecvRtpPackets();
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SendRecvRtcpPackets();
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}
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std::unique_ptr<DtlsSrtpTransport> dtls_srtp_transport1_;
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std::unique_ptr<DtlsSrtpTransport> dtls_srtp_transport2_;
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webrtc::TransportObserver transport_observer1_;
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webrtc::TransportObserver transport_observer2_;
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int sequence_number_ = 0;
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};
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// Tests that if RTCP muxing is enabled and transports are set after RTP
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// transport finished the handshake, SRTP is set up.
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TEST_F(DtlsSrtpTransportTest, SetTransportsAfterHandshakeCompleteWithRtcpMux) {
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auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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MakeDtlsSrtpTransports(rtp_dtls1.get(), nullptr, rtp_dtls2.get(), nullptr,
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/*rtcp_mux_enabled=*/true);
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auto rtp_dtls3 = std::make_unique<FakeDtlsTransport>(
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"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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auto rtp_dtls4 = std::make_unique<FakeDtlsTransport>(
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"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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CompleteDtlsHandshake(rtp_dtls3.get(), rtp_dtls4.get());
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dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls3.get(), nullptr);
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dtls_srtp_transport2_->SetDtlsTransports(rtp_dtls4.get(), nullptr);
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SendRecvPackets();
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}
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// Tests that if RTCP muxing is not enabled and transports are set after both
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// RTP and RTCP transports finished the handshake, SRTP is set up.
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TEST_F(DtlsSrtpTransportTest,
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SetTransportsAfterHandshakeCompleteWithoutRtcpMux) {
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auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
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auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
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"video", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
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MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
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rtcp_dtls2.get(), /*rtcp_mux_enabled=*/false);
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auto rtp_dtls3 = std::make_unique<FakeDtlsTransport>(
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"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
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|
|
auto rtcp_dtls3 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls4 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls4 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
CompleteDtlsHandshake(rtp_dtls3.get(), rtp_dtls4.get());
|
||
|
|
CompleteDtlsHandshake(rtcp_dtls3.get(), rtcp_dtls4.get());
|
||
|
|
|
||
|
|
dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls3.get(), rtcp_dtls3.get());
|
||
|
|
dtls_srtp_transport2_->SetDtlsTransports(rtp_dtls4.get(), rtcp_dtls4.get());
|
||
|
|
|
||
|
|
SendRecvPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests if RTCP muxing is enabled, SRTP is set up as soon as the RTP DTLS
|
||
|
|
// handshake is finished.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, SetTransportsBeforeHandshakeCompleteWithRtcpMux) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(),
|
||
|
|
/*rtcp_mux_enabled=*/false);
|
||
|
|
|
||
|
|
dtls_srtp_transport1_->SetRtcpMuxEnabled(true);
|
||
|
|
dtls_srtp_transport2_->SetRtcpMuxEnabled(true);
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
SendRecvPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests if RTCP muxing is not enabled, SRTP is set up when both the RTP and
|
||
|
|
// RTCP DTLS handshake are finished.
|
||
|
|
TEST_F(DtlsSrtpTransportTest,
|
||
|
|
SetTransportsBeforeHandshakeCompleteWithoutRtcpMux) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(), /*rtcp_mux_enabled=*/false);
|
||
|
|
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport1_->IsSrtpActive());
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport2_->IsSrtpActive());
|
||
|
|
CompleteDtlsHandshake(rtcp_dtls1.get(), rtcp_dtls2.get());
|
||
|
|
SendRecvPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests that if the DtlsTransport underneath is changed, the previous DTLS-SRTP
|
||
|
|
// context will be reset and will be re-setup once the new transports' handshake
|
||
|
|
// complete.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, DtlsSrtpResetAfterDtlsTransportChange) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), nullptr, rtp_dtls2.get(), nullptr,
|
||
|
|
/*rtcp_mux_enabled=*/true);
|
||
|
|
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
EXPECT_TRUE(dtls_srtp_transport1_->IsSrtpActive());
|
||
|
|
EXPECT_TRUE(dtls_srtp_transport2_->IsSrtpActive());
|
||
|
|
|
||
|
|
auto rtp_dtls3 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtp_dtls4 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
|
||
|
|
// The previous context is reset.
|
||
|
|
dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls3.get(), nullptr);
|
||
|
|
dtls_srtp_transport2_->SetDtlsTransports(rtp_dtls4.get(), nullptr);
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport1_->IsSrtpActive());
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport2_->IsSrtpActive());
|
||
|
|
|
||
|
|
// Re-setup.
|
||
|
|
CompleteDtlsHandshake(rtp_dtls3.get(), rtp_dtls4.get());
|
||
|
|
SendRecvPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests if only the RTP DTLS handshake complete, and then RTCP muxing is
|
||
|
|
// enabled, SRTP is set up.
|
||
|
|
TEST_F(DtlsSrtpTransportTest,
|
||
|
|
RtcpMuxEnabledAfterRtpTransportHandshakeComplete) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(), /*rtcp_mux_enabled=*/false);
|
||
|
|
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
// Inactive because the RTCP transport handshake didn't complete.
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport1_->IsSrtpActive());
|
||
|
|
EXPECT_FALSE(dtls_srtp_transport2_->IsSrtpActive());
|
||
|
|
|
||
|
|
dtls_srtp_transport1_->SetRtcpMuxEnabled(true);
|
||
|
|
dtls_srtp_transport2_->SetRtcpMuxEnabled(true);
|
||
|
|
// The transports should be active and be able to send packets when the
|
||
|
|
// RTCP muxing is enabled.
|
||
|
|
SendRecvPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests that when SetSend/RecvEncryptedHeaderExtensionIds is called, the SRTP
|
||
|
|
// sessions are updated with new encryped header extension IDs immediately.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, EncryptedHeaderExtensionIdUpdated) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), nullptr, rtp_dtls2.get(), nullptr,
|
||
|
|
/*rtcp_mux_enabled=*/true);
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
|
||
|
|
std::vector<int> encrypted_headers;
|
||
|
|
encrypted_headers.push_back(kHeaderExtensionIDs[0]);
|
||
|
|
encrypted_headers.push_back(kHeaderExtensionIDs[1]);
|
||
|
|
|
||
|
|
dtls_srtp_transport1_->UpdateSendEncryptedHeaderExtensionIds(
|
||
|
|
encrypted_headers);
|
||
|
|
dtls_srtp_transport1_->UpdateRecvEncryptedHeaderExtensionIds(
|
||
|
|
encrypted_headers);
|
||
|
|
dtls_srtp_transport2_->UpdateSendEncryptedHeaderExtensionIds(
|
||
|
|
encrypted_headers);
|
||
|
|
dtls_srtp_transport2_->UpdateRecvEncryptedHeaderExtensionIds(
|
||
|
|
encrypted_headers);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests if RTCP muxing is enabled. DtlsSrtpTransport is ready to send once the
|
||
|
|
// RTP DtlsTransport is ready.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, SignalReadyToSendFiredWithRtcpMux) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), nullptr, rtp_dtls2.get(), nullptr,
|
||
|
|
/*rtcp_mux_enabled=*/true);
|
||
|
|
|
||
|
|
rtp_dtls1->SetDestination(rtp_dtls2.get());
|
||
|
|
EXPECT_TRUE(transport_observer1_.ready_to_send());
|
||
|
|
EXPECT_TRUE(transport_observer2_.ready_to_send());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests if RTCP muxing is not enabled. DtlsSrtpTransport is ready to send once
|
||
|
|
// both the RTP and RTCP DtlsTransport are ready.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, SignalReadyToSendFiredWithoutRtcpMux) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(), /*rtcp_mux_enabled=*/false);
|
||
|
|
|
||
|
|
rtp_dtls1->SetDestination(rtp_dtls2.get());
|
||
|
|
EXPECT_FALSE(transport_observer1_.ready_to_send());
|
||
|
|
EXPECT_FALSE(transport_observer2_.ready_to_send());
|
||
|
|
|
||
|
|
rtcp_dtls1->SetDestination(rtcp_dtls2.get());
|
||
|
|
EXPECT_TRUE(transport_observer1_.ready_to_send());
|
||
|
|
EXPECT_TRUE(transport_observer2_.ready_to_send());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test that if an endpoint "fully" enables RTCP mux, setting the RTCP
|
||
|
|
// transport to null, it *doesn't* reset its SRTP context. That would cause the
|
||
|
|
// ROC and SRTCP index to be reset, causing replay detection and other errors
|
||
|
|
// when attempting to unprotect packets.
|
||
|
|
// Regression test for bugs.webrtc.org/8996
|
||
|
|
TEST_F(DtlsSrtpTransportTest, SrtpSessionNotResetWhenRtcpTransportRemoved) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(), /*rtcp_mux_enabled=*/true);
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
CompleteDtlsHandshake(rtcp_dtls1.get(), rtcp_dtls2.get());
|
||
|
|
|
||
|
|
// Send some RTCP packets, causing the SRTCP index to be incremented.
|
||
|
|
SendRecvRtcpPackets();
|
||
|
|
|
||
|
|
// Set RTCP transport to null, which previously would trigger this problem.
|
||
|
|
dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls1.get(), nullptr);
|
||
|
|
|
||
|
|
// Attempt to send more RTCP packets. If the issue occurred, one side would
|
||
|
|
// reset its context while the other would not, causing replay detection
|
||
|
|
// errors when a packet with a duplicate SRTCP index is received.
|
||
|
|
SendRecvRtcpPackets();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests that RTCP packets can be sent and received if both sides actively reset
|
||
|
|
// the SRTP parameters with the |active_reset_srtp_params_| flag.
|
||
|
|
TEST_F(DtlsSrtpTransportTest, ActivelyResetSrtpParams) {
|
||
|
|
auto rtp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls1 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
auto rtp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTP);
|
||
|
|
auto rtcp_dtls2 = std::make_unique<FakeDtlsTransport>(
|
||
|
|
"audio", cricket::ICE_CANDIDATE_COMPONENT_RTCP);
|
||
|
|
|
||
|
|
MakeDtlsSrtpTransports(rtp_dtls1.get(), rtcp_dtls1.get(), rtp_dtls2.get(),
|
||
|
|
rtcp_dtls2.get(), /*rtcp_mux_enabled=*/true);
|
||
|
|
CompleteDtlsHandshake(rtp_dtls1.get(), rtp_dtls2.get());
|
||
|
|
CompleteDtlsHandshake(rtcp_dtls1.get(), rtcp_dtls2.get());
|
||
|
|
|
||
|
|
// Send some RTCP packets, causing the SRTCP index to be incremented.
|
||
|
|
SendRecvRtcpPackets();
|
||
|
|
|
||
|
|
// Only set the |active_reset_srtp_params_| flag to be true one side.
|
||
|
|
dtls_srtp_transport1_->SetActiveResetSrtpParams(true);
|
||
|
|
// Set RTCP transport to null to trigger the SRTP parameters update.
|
||
|
|
dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls1.get(), nullptr);
|
||
|
|
dtls_srtp_transport2_->SetDtlsTransports(rtp_dtls2.get(), nullptr);
|
||
|
|
|
||
|
|
// Sending some RTCP packets.
|
||
|
|
size_t rtcp_len = sizeof(kRtcpReport);
|
||
|
|
size_t packet_size = rtcp_len + 4 + kRtpAuthTagLen;
|
||
|
|
rtc::Buffer rtcp_packet_buffer(packet_size);
|
||
|
|
rtc::CopyOnWriteBuffer rtcp_packet(kRtcpReport, rtcp_len, packet_size);
|
||
|
|
int prev_received_packets = transport_observer2_.rtcp_count();
|
||
|
|
ASSERT_TRUE(dtls_srtp_transport1_->SendRtcpPacket(
|
||
|
|
&rtcp_packet, rtc::PacketOptions(), cricket::PF_SRTP_BYPASS));
|
||
|
|
// The RTCP packet is not exepected to be received because the SRTP parameters
|
||
|
|
// are only reset on one side and the SRTCP index is out of sync.
|
||
|
|
EXPECT_EQ(prev_received_packets, transport_observer2_.rtcp_count());
|
||
|
|
|
||
|
|
// Set the flag to be true on the other side.
|
||
|
|
dtls_srtp_transport2_->SetActiveResetSrtpParams(true);
|
||
|
|
// Set RTCP transport to null to trigger the SRTP parameters update.
|
||
|
|
dtls_srtp_transport1_->SetDtlsTransports(rtp_dtls1.get(), nullptr);
|
||
|
|
dtls_srtp_transport2_->SetDtlsTransports(rtp_dtls2.get(), nullptr);
|
||
|
|
|
||
|
|
// RTCP packets flow is expected to work just fine.
|
||
|
|
SendRecvRtcpPackets();
|
||
|
|
}
|