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