1/* 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/dlrr.h" 12 13#include "testing/gtest/include/gtest/gtest.h" 14 15#include "webrtc/modules/rtp_rtcp/source/byte_io.h" 16 17using webrtc::rtcp::Dlrr; 18 19namespace webrtc { 20namespace { 21 22const uint32_t kSsrc = 0x12345678; 23const uint32_t kLastRR = 0x23344556; 24const uint32_t kDelay = 0x33343536; 25const uint8_t kBlock[] = {0x05, 0x00, 0x00, 0x03, 0x12, 0x34, 0x56, 0x78, 26 0x23, 0x34, 0x45, 0x56, 0x33, 0x34, 0x35, 0x36}; 27const size_t kBlockSizeBytes = sizeof(kBlock); 28 29TEST(RtcpPacketDlrrTest, Empty) { 30 Dlrr dlrr; 31 32 EXPECT_EQ(0u, dlrr.BlockLength()); 33} 34 35TEST(RtcpPacketDlrrTest, Create) { 36 Dlrr dlrr; 37 EXPECT_TRUE(dlrr.WithDlrrItem(kSsrc, kLastRR, kDelay)); 38 39 ASSERT_EQ(kBlockSizeBytes, dlrr.BlockLength()); 40 uint8_t buffer[kBlockSizeBytes]; 41 42 dlrr.Create(buffer); 43 EXPECT_EQ(0, memcmp(buffer, kBlock, kBlockSizeBytes)); 44} 45 46TEST(RtcpPacketDlrrTest, Parse) { 47 Dlrr dlrr; 48 uint16_t block_length = ByteReader<uint16_t>::ReadBigEndian(&kBlock[2]); 49 EXPECT_TRUE(dlrr.Parse(kBlock, block_length)); 50 51 EXPECT_EQ(1u, dlrr.sub_blocks().size()); 52 const Dlrr::SubBlock& block = dlrr.sub_blocks().front(); 53 EXPECT_EQ(kSsrc, block.ssrc); 54 EXPECT_EQ(kLastRR, block.last_rr); 55 EXPECT_EQ(kDelay, block.delay_since_last_rr); 56} 57 58TEST(RtcpPacketDlrrTest, ParseFailsOnBadSize) { 59 const size_t kBigBufferSize = 0x100; // More than enough. 60 uint8_t buffer[kBigBufferSize]; 61 buffer[0] = Dlrr::kBlockType; 62 buffer[1] = 0; // Reserved. 63 buffer[2] = 0; // Most significant size byte. 64 for (uint8_t size = 3; size < 6; ++size) { 65 buffer[3] = size; 66 Dlrr dlrr; 67 // Parse should be successful only when size is multiple of 3. 68 EXPECT_EQ(size % 3 == 0, dlrr.Parse(buffer, static_cast<uint16_t>(size))); 69 } 70} 71 72TEST(RtcpPacketDlrrTest, FailsOnTooManySubBlocks) { 73 Dlrr dlrr; 74 for (size_t i = 1; i <= Dlrr::kMaxNumberOfDlrrItems; ++i) { 75 EXPECT_TRUE(dlrr.WithDlrrItem(kSsrc + i, kLastRR + i, kDelay + i)); 76 } 77 EXPECT_FALSE(dlrr.WithDlrrItem(kSsrc, kLastRR, kDelay)); 78} 79 80TEST(RtcpPacketDlrrTest, CreateAndParseMaxSubBlocks) { 81 const size_t kBufferSize = 0x1000; // More than enough. 82 uint8_t buffer[kBufferSize]; 83 84 // Create. 85 Dlrr dlrr; 86 for (size_t i = 1; i <= Dlrr::kMaxNumberOfDlrrItems; ++i) { 87 EXPECT_TRUE(dlrr.WithDlrrItem(kSsrc + i, kLastRR + i, kDelay + i)); 88 } 89 size_t used_buffer_size = dlrr.BlockLength(); 90 ASSERT_LE(used_buffer_size, kBufferSize); 91 dlrr.Create(buffer); 92 93 // Parse. 94 Dlrr parsed; 95 uint16_t block_length = ByteReader<uint16_t>::ReadBigEndian(&buffer[2]); 96 EXPECT_EQ(used_buffer_size, (block_length + 1) * 4u); 97 EXPECT_TRUE(parsed.Parse(buffer, block_length)); 98 EXPECT_TRUE(parsed.sub_blocks().size() == Dlrr::kMaxNumberOfDlrrItems); 99} 100 101} // namespace 102} // namespace webrtc 103