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/*
* 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 <vector>
#include "media/base/fakertp.h"
#include "media/base/rtputils.h"
#include "rtc_base/asyncpacketsocket.h"
#include "rtc_base/gunit.h"
namespace cricket {
static const uint8_t kRtpPacketWithMarker[] = {
0x80, 0x80, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
// 3 CSRCs (0x01020304, 0x12345678, 0xAABBCCDD)
// Extension (0xBEDE, 0x1122334455667788)
static const uint8_t kRtpPacketWithMarkerAndCsrcAndExtension[] = {
0x93, 0x80, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x01, 0x02, 0x03, 0x04, 0x12, 0x34, 0x56, 0x78, 0xAA, 0xBB, 0xCC, 0xDD,
0xBE, 0xDE, 0x00, 0x02, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88};
static const uint8_t kInvalidPacket[] = {0x80, 0x00};
static const uint8_t kInvalidPacketWithCsrc[] = {
0x83, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x01, 0x02, 0x03, 0x04, 0x12, 0x34, 0x56, 0x78, 0xAA, 0xBB, 0xCC};
static const uint8_t kInvalidPacketWithCsrcAndExtension1[] = {
0x93, 0x80, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x01, 0x02, 0x03, 0x04, 0x12, 0x34,
0x56, 0x78, 0xAA, 0xBB, 0xCC, 0xDD, 0xBE, 0xDE, 0x00};
static const uint8_t kInvalidPacketWithCsrcAndExtension2[] = {
0x93, 0x80, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x01, 0x02, 0x03, 0x04, 0x12, 0x34, 0x56, 0x78, 0xAA, 0xBB, 0xCC, 0xDD,
0xBE, 0xDE, 0x00, 0x02, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
// 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 single byte extension header of length 4 bytes.
// Extension id = 3 and length = 3
static uint8_t kRtpMsgWithAbsSendTimeExtension[] = {
0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xBE, 0xDE, 0x00, 0x02, 0x22, 0x00, 0x02, 0x1c, 0x32, 0xaa, 0xbb, 0xcc,
};
// Index of AbsSendTimeExtn data in message |kRtpMsgWithAbsSendTimeExtension|.
static const int kAstIndexInRtpMsg = 21;
TEST(RtpUtilsTest, GetRtp) {
EXPECT_TRUE(IsRtpPacket(kPcmuFrame, sizeof(kPcmuFrame)));
int pt;
EXPECT_TRUE(GetRtpPayloadType(kPcmuFrame, sizeof(kPcmuFrame), &pt));
EXPECT_EQ(0, pt);
EXPECT_TRUE(GetRtpPayloadType(kRtpPacketWithMarker,
sizeof(kRtpPacketWithMarker), &pt));
EXPECT_EQ(0, pt);
int seq_num;
EXPECT_TRUE(GetRtpSeqNum(kPcmuFrame, sizeof(kPcmuFrame), &seq_num));
EXPECT_EQ(1, seq_num);
uint32_t ts;
EXPECT_TRUE(GetRtpTimestamp(kPcmuFrame, sizeof(kPcmuFrame), &ts));
EXPECT_EQ(0u, ts);
uint32_t ssrc;
EXPECT_TRUE(GetRtpSsrc(kPcmuFrame, sizeof(kPcmuFrame), &ssrc));
EXPECT_EQ(1u, ssrc);
RtpHeader header;
EXPECT_TRUE(GetRtpHeader(kPcmuFrame, sizeof(kPcmuFrame), &header));
EXPECT_EQ(0, header.payload_type);
EXPECT_EQ(1, header.seq_num);
EXPECT_EQ(0u, header.timestamp);
EXPECT_EQ(1u, header.ssrc);
EXPECT_FALSE(GetRtpPayloadType(kInvalidPacket, sizeof(kInvalidPacket), &pt));
EXPECT_FALSE(GetRtpSeqNum(kInvalidPacket, sizeof(kInvalidPacket), &seq_num));
EXPECT_FALSE(GetRtpTimestamp(kInvalidPacket, sizeof(kInvalidPacket), &ts));
EXPECT_FALSE(GetRtpSsrc(kInvalidPacket, sizeof(kInvalidPacket), &ssrc));
}
TEST(RtpUtilsTest, SetRtpHeader) {
uint8_t packet[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
RtpHeader header = {9, 1111, 2222u, 3333u};
EXPECT_TRUE(SetRtpHeader(packet, sizeof(packet), header));
// Bits: 10 0 0 0000
EXPECT_EQ(128u, packet[0]);
size_t len;
EXPECT_TRUE(GetRtpHeaderLen(packet, sizeof(packet), &len));
EXPECT_EQ(12U, len);
EXPECT_TRUE(GetRtpHeader(packet, sizeof(packet), &header));
EXPECT_EQ(9, header.payload_type);
EXPECT_EQ(1111, header.seq_num);
EXPECT_EQ(2222u, header.timestamp);
EXPECT_EQ(3333u, header.ssrc);
}
TEST(RtpUtilsTest, GetRtpHeaderLen) {
size_t len;
EXPECT_TRUE(GetRtpHeaderLen(kPcmuFrame, sizeof(kPcmuFrame), &len));
EXPECT_EQ(12U, len);
EXPECT_TRUE(GetRtpHeaderLen(kRtpPacketWithMarkerAndCsrcAndExtension,
sizeof(kRtpPacketWithMarkerAndCsrcAndExtension),
&len));
EXPECT_EQ(sizeof(kRtpPacketWithMarkerAndCsrcAndExtension), len);
EXPECT_FALSE(GetRtpHeaderLen(kInvalidPacket, sizeof(kInvalidPacket), &len));
EXPECT_FALSE(GetRtpHeaderLen(kInvalidPacketWithCsrc,
sizeof(kInvalidPacketWithCsrc), &len));
EXPECT_FALSE(GetRtpHeaderLen(kInvalidPacketWithCsrcAndExtension1,
sizeof(kInvalidPacketWithCsrcAndExtension1),
&len));
EXPECT_FALSE(GetRtpHeaderLen(kInvalidPacketWithCsrcAndExtension2,
sizeof(kInvalidPacketWithCsrcAndExtension2),
&len));
}
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, ValidRtpPacketWithAbsSendTimeExtension) {
EXPECT_TRUE(ValidateRtpHeader(kRtpMsgWithAbsSendTimeExtension,
sizeof(kRtpMsgWithAbsSendTimeExtension),
nullptr));
}
// Verify handling of a 2 byte extension header RTP messsage. Currently these
// messages are not supported.
TEST(RtpUtilsTest, UpdateAbsSendTimeExtensionIn2ByteHeaderExtn) {
std::vector<uint8_t> data(
kRtpMsgWith2ByteExtnHeader,
kRtpMsgWith2ByteExtnHeader + sizeof(kRtpMsgWith2ByteExtnHeader));
EXPECT_FALSE(UpdateRtpAbsSendTimeExtension(&data[0], data.size(), 3, 0));
}
// 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<uint8_t> rtp_packet(kRtpMsgWithAbsSendTimeExtension,
kRtpMsgWithAbsSendTimeExtension +
sizeof(kRtpMsgWithAbsSendTimeExtension));
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(kRtpMsgWithAbsSendTimeExtension)],
kFakeTag, 4));
// Verify AbsouluteSendTime extension field wasn't modified.
EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInRtpMsg], 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<uint8_t> rtp_packet(kRtpMsgWithAbsSendTimeExtension,
kRtpMsgWithAbsSendTimeExtension +
sizeof(kRtpMsgWithAbsSendTimeExtension));
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(kRtpMsgWithAbsSendTimeExtension)],
kExpectedTag, sizeof(kExpectedTag)));
// Verify AbsouluteSendTime extension field is not modified.
EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInRtpMsg], kTestAstValue,
sizeof(kTestAstValue)));
}
// Verify finding an extension ID in a raw rtp message.
TEST(RtpUtilsTest, UpdateAbsSendTimeExtensionInRtpPacket) {
std::vector<uint8_t> rtp_packet(kRtpMsgWithAbsSendTimeExtension,
kRtpMsgWithAbsSendTimeExtension +
sizeof(kRtpMsgWithAbsSendTimeExtension));
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[kAstIndexInRtpMsg], 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<uint8_t> rtp_packet(kRtpMsgWithAbsSendTimeExtension,
kRtpMsgWithAbsSendTimeExtension +
sizeof(kRtpMsgWithAbsSendTimeExtension));
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(kRtpMsgWithAbsSendTimeExtension)],
kExpectedTag, sizeof(kExpectedTag)));
// Verify that the timestamp was updated.
const uint8_t kExpectedTimestamp[3] = {0xcc, 0xbb, 0xaa};
EXPECT_EQ(0, memcmp(&rtp_packet[kAstIndexInRtpMsg], kExpectedTimestamp,
sizeof(kExpectedTimestamp)));
}
} // namespace cricket