/* * Copyright (c) 2004 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 "media/base/rtp_utils.h" #include #include #include #include "media/base/fake_rtp.h" #include "rtc_base/async_packet_socket.h" #include "test/gtest.h" namespace cricket { static const uint8_t kInvalidPacket[] = {0x80, 0x00}; // PT = 206, FMT = 1, Sender SSRC = 0x1111, Media SSRC = 0x1111 // No FCI information is needed for PLI. static const uint8_t kNonCompoundRtcpPliFeedbackPacket[] = { 0x81, 0xCE, 0x00, 0x0C, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00, 0x11, 0x11}; // Packet has only mandatory fixed RTCP header // PT = 204, SSRC = 0x1111 static const uint8_t kNonCompoundRtcpAppPacket[] = {0x81, 0xCC, 0x00, 0x0C, 0x00, 0x00, 0x11, 0x11}; // PT = 202, Source count = 0 static const uint8_t kNonCompoundRtcpSDESPacket[] = {0x80, 0xCA, 0x00, 0x00}; static uint8_t kFakeTag[4] = {0xba, 0xdd, 0xba, 0xdd}; static uint8_t kTestKey[] = "12345678901234567890"; static uint8_t kTestAstValue[3] = {0xaa, 0xbb, 0xcc}; // Valid rtp Message with 2 byte header extension. static uint8_t kRtpMsgWith2ByteExtnHeader[] = { // clang-format off // clang formatting doesn't respect inline comments. 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xAA, 0xBB, 0xCC, 0XDD, // SSRC 0x10, 0x00, 0x00, 0x01, // 2 Byte header extension 0x01, 0x00, 0x00, 0x00 // clang-format on }; // RTP packet with two one-byte header extensions. The last 4 bytes consist of // abs-send-time with extension id = 3 and length = 3. static uint8_t kRtpMsgWithOneByteAbsSendTimeExtension[] = { 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xBE, 0xDE, 0x00, 0x02, 0x22, 0x00, 0x02, 0x1c, 0x32, 0xaa, 0xbb, 0xcc, }; // RTP packet with two two-byte header extensions. The last 5 bytes consist of // abs-send-time with extension id = 3 and length = 3. static uint8_t kRtpMsgWithTwoByteAbsSendTimeExtension[] = { 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02, 0x02, 0x01, 0x02, 0x03, 0x03, 0xaa, 0xbb, 0xcc, }; // Index of AbsSendTimeExtn data in message // `kRtpMsgWithOneByteAbsSendTimeExtension`. static const int kAstIndexInOneByteRtpMsg = 21; // and in message `kRtpMsgWithTwoByteAbsSendTimeExtension`. static const int kAstIndexInTwoByteRtpMsg = 21; static const rtc::ArrayView kPcmuFrameArrayView = rtc::MakeArrayView(reinterpret_cast(kPcmuFrame), sizeof(kPcmuFrame)); static const rtc::ArrayView kRtcpReportArrayView = rtc::MakeArrayView(reinterpret_cast(kRtcpReport), sizeof(kRtcpReport)); static const rtc::ArrayView kInvalidPacketArrayView = rtc::MakeArrayView(reinterpret_cast(kInvalidPacket), sizeof(kInvalidPacket)); TEST(RtpUtilsTest, GetRtcp) { int pt; EXPECT_TRUE(GetRtcpType(kRtcpReport, sizeof(kRtcpReport), &pt)); EXPECT_EQ(0xc9, pt); EXPECT_FALSE(GetRtcpType(kInvalidPacket, sizeof(kInvalidPacket), &pt)); uint32_t ssrc; EXPECT_TRUE(GetRtcpSsrc(kNonCompoundRtcpPliFeedbackPacket, sizeof(kNonCompoundRtcpPliFeedbackPacket), &ssrc)); EXPECT_TRUE(GetRtcpSsrc(kNonCompoundRtcpAppPacket, sizeof(kNonCompoundRtcpAppPacket), &ssrc)); EXPECT_FALSE(GetRtcpSsrc(kNonCompoundRtcpSDESPacket, sizeof(kNonCompoundRtcpSDESPacket), &ssrc)); } // Invalid RTP packets. TEST(RtpUtilsTest, InvalidRtpHeader) { // Rtp message with invalid length. const uint8_t kRtpMsgWithInvalidLength[] = { // clang-format off // clang formatting doesn't respect inline comments. 0x94, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xAA, 0xBB, 0xCC, 0XDD, // SSRC 0xDD, 0xCC, 0xBB, 0xAA, // Only 1 CSRC, but CC count is 4. // clang-format on }; EXPECT_FALSE(ValidateRtpHeader(kRtpMsgWithInvalidLength, sizeof(kRtpMsgWithInvalidLength), nullptr)); // Rtp message with single byte header extension, invalid extension length. const uint8_t kRtpMsgWithInvalidExtnLength[] = { 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xBE, 0xDE, 0x0A, 0x00, // Extn length - 0x0A00 }; EXPECT_FALSE(ValidateRtpHeader(kRtpMsgWithInvalidExtnLength, sizeof(kRtpMsgWithInvalidExtnLength), nullptr)); } // Valid RTP packet with a 2byte header extension. TEST(RtpUtilsTest, Valid2ByteExtnHdrRtpMessage) { EXPECT_TRUE(ValidateRtpHeader(kRtpMsgWith2ByteExtnHeader, sizeof(kRtpMsgWith2ByteExtnHeader), nullptr)); } // Valid RTP packet which has 1 byte header AbsSendTime extension in it. TEST(RtpUtilsTest, ValidRtpPacketWithOneByteAbsSendTimeExtension) { EXPECT_TRUE(ValidateRtpHeader(kRtpMsgWithOneByteAbsSendTimeExtension, sizeof(kRtpMsgWithOneByteAbsSendTimeExtension), nullptr)); } // Valid RTP packet which has 2 byte header AbsSendTime extension in it. TEST(RtpUtilsTest, ValidRtpPacketWithTwoByteAbsSendTimeExtension) { EXPECT_TRUE(ValidateRtpHeader(kRtpMsgWithTwoByteAbsSendTimeExtension, sizeof(kRtpMsgWithTwoByteAbsSendTimeExtension), nullptr)); } // Verify finding an extension ID in the TURN send indication message. TEST(RtpUtilsTest, UpdateAbsSendTimeExtensionInTurnSendIndication) { // A valid STUN indication message with a valid RTP header in data attribute // payload field and no extension bit set. uint8_t message_without_extension[] = { // clang-format off // clang formatting doesn't respect inline comments. 0x00, 0x16, 0x00, 0x18, // length of 0x21, 0x12, 0xA4, 0x42, // magic cookie '0', '1', '2', '3', // transaction id '4', '5', '6', '7', '8', '9', 'a', 'b', 0x00, 0x20, 0x00, 0x04, // Mapped address. 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0x0C, // Data attribute. 0x80, 0x00, 0x00, 0x00, // RTP packet. 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // clang-format on }; EXPECT_TRUE(UpdateRtpAbsSendTimeExtension( message_without_extension, sizeof(message_without_extension), 3, 0)); // A valid STUN indication message with a valid RTP header and a extension // header. uint8_t message[] = { // clang-format off // clang formatting doesn't respect inline comments. 0x00, 0x16, 0x00, 0x24, // length of 0x21, 0x12, 0xA4, 0x42, // magic cookie '0', '1', '2', '3', // transaction id '4', '5', '6', '7', '8', '9', 'a', 'b', 0x00, 0x20, 0x00, 0x04, // Mapped address. 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0x18, // Data attribute. 0x90, 0x00, 0x00, 0x00, // RTP packet. 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xBE, 0xDE, 0x00, 0x02, 0x22, 0xaa, 0xbb, 0xcc, 0x32, 0xaa, 0xbb, 0xcc, // clang-format on }; EXPECT_TRUE(UpdateRtpAbsSendTimeExtension(message, sizeof(message), 3, 0)); } // Test without any packet options variables set. This method should return // without HMAC value in the packet. TEST(RtpUtilsTest, ApplyPacketOptionsWithDefaultValues) { rtc::PacketTimeUpdateParams packet_time_params; std::vector rtp_packet( kRtpMsgWithOneByteAbsSendTimeExtension, kRtpMsgWithOneByteAbsSendTimeExtension + sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)); rtp_packet.insert(rtp_packet.end(), kFakeTag, kFakeTag + sizeof(kFakeTag)); EXPECT_TRUE(ApplyPacketOptions(&rtp_packet[0], rtp_packet.size(), packet_time_params, 0)); // Making sure HMAC wasn't updated.. EXPECT_EQ(0, memcmp(&rtp_packet[sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)], kFakeTag, 4)); // Verify AbsouluteSendTime extension field wasn't modified. EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInOneByteRtpMsg], kTestAstValue, sizeof(kTestAstValue))); } // Veirfy HMAC is updated when packet option parameters are set. TEST(RtpUtilsTest, ApplyPacketOptionsWithAuthParams) { rtc::PacketTimeUpdateParams packet_time_params; packet_time_params.srtp_auth_key.assign(kTestKey, kTestKey + sizeof(kTestKey)); packet_time_params.srtp_auth_tag_len = 4; std::vector rtp_packet( kRtpMsgWithOneByteAbsSendTimeExtension, kRtpMsgWithOneByteAbsSendTimeExtension + sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)); rtp_packet.insert(rtp_packet.end(), kFakeTag, kFakeTag + sizeof(kFakeTag)); EXPECT_TRUE(ApplyPacketOptions(&rtp_packet[0], rtp_packet.size(), packet_time_params, 0)); uint8_t kExpectedTag[] = {0xc1, 0x7a, 0x8c, 0xa0}; EXPECT_EQ(0, memcmp(&rtp_packet[sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)], kExpectedTag, sizeof(kExpectedTag))); // Verify AbsouluteSendTime extension field is not modified. EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInOneByteRtpMsg], kTestAstValue, sizeof(kTestAstValue))); } // Verify finding an extension ID in a raw rtp message. TEST(RtpUtilsTest, UpdateOneByteAbsSendTimeExtensionInRtpPacket) { std::vector rtp_packet( kRtpMsgWithOneByteAbsSendTimeExtension, kRtpMsgWithOneByteAbsSendTimeExtension + sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)); EXPECT_TRUE(UpdateRtpAbsSendTimeExtension(&rtp_packet[0], rtp_packet.size(), 3, 51183266)); // Verify that the timestamp was updated. const uint8_t kExpectedTimestamp[3] = {0xcc, 0xbb, 0xaa}; EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInOneByteRtpMsg], kExpectedTimestamp, sizeof(kExpectedTimestamp))); } // Verify finding an extension ID in a raw rtp message. TEST(RtpUtilsTest, UpdateTwoByteAbsSendTimeExtensionInRtpPacket) { std::vector rtp_packet( kRtpMsgWithTwoByteAbsSendTimeExtension, kRtpMsgWithTwoByteAbsSendTimeExtension + sizeof(kRtpMsgWithTwoByteAbsSendTimeExtension)); EXPECT_TRUE(UpdateRtpAbsSendTimeExtension(&rtp_packet[0], rtp_packet.size(), 3, 51183266)); // Verify that the timestamp was updated. const uint8_t kExpectedTimestamp[3] = {0xcc, 0xbb, 0xaa}; EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInTwoByteRtpMsg], kExpectedTimestamp, sizeof(kExpectedTimestamp))); } // Verify we update both AbsSendTime extension header and HMAC. TEST(RtpUtilsTest, ApplyPacketOptionsWithAuthParamsAndAbsSendTime) { rtc::PacketTimeUpdateParams packet_time_params; packet_time_params.srtp_auth_key.assign(kTestKey, kTestKey + sizeof(kTestKey)); packet_time_params.srtp_auth_tag_len = 4; packet_time_params.rtp_sendtime_extension_id = 3; // 3 is also present in the test message. std::vector rtp_packet( kRtpMsgWithOneByteAbsSendTimeExtension, kRtpMsgWithOneByteAbsSendTimeExtension + sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)); rtp_packet.insert(rtp_packet.end(), kFakeTag, kFakeTag + sizeof(kFakeTag)); EXPECT_TRUE(ApplyPacketOptions(&rtp_packet[0], rtp_packet.size(), packet_time_params, 51183266)); const uint8_t kExpectedTag[] = {0x81, 0xd1, 0x2c, 0x0e}; EXPECT_EQ(0, memcmp(&rtp_packet[sizeof(kRtpMsgWithOneByteAbsSendTimeExtension)], kExpectedTag, sizeof(kExpectedTag))); // Verify that the timestamp was updated. const uint8_t kExpectedTimestamp[3] = {0xcc, 0xbb, 0xaa}; EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInOneByteRtpMsg], kExpectedTimestamp, sizeof(kExpectedTimestamp))); } TEST(RtpUtilsTest, InferRtpPacketType) { EXPECT_EQ(RtpPacketType::kRtp, InferRtpPacketType(kPcmuFrameArrayView)); EXPECT_EQ(RtpPacketType::kRtcp, InferRtpPacketType(kRtcpReportArrayView)); EXPECT_EQ(RtpPacketType::kUnknown, InferRtpPacketType(kInvalidPacketArrayView)); } } // namespace cricket