85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
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/*
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* Copyright (c) 2021 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 "net/dcsctp/packet/chunk/sack_chunk.h"
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#include <cstdint>
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#include <type_traits>
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#include <vector>
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#include "api/array_view.h"
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#include "net/dcsctp/testing/testing_macros.h"
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#include "rtc_base/gunit.h"
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#include "test/gmock.h"
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namespace dcsctp {
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namespace {
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using ::testing::ElementsAre;
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TEST(SackChunkTest, FromCapture) {
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/*
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SACK chunk (Cumulative TSN: 916312075, a_rwnd: 126323,
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gaps: 2, duplicate TSNs: 1)
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Chunk type: SACK (3)
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Chunk flags: 0x00
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Chunk length: 28
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Cumulative TSN ACK: 916312075
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Advertised receiver window credit (a_rwnd): 126323
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Number of gap acknowledgement blocks: 2
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Number of duplicated TSNs: 1
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Gap Acknowledgement for TSN 916312077 to 916312081
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Gap Acknowledgement for TSN 916312083 to 916312083
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[Number of TSNs in gap acknowledgement blocks: 6]
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Duplicate TSN: 916312081
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*/
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uint8_t data[] = {0x03, 0x00, 0x00, 0x1c, 0x36, 0x9d, 0xd0, 0x0b, 0x00, 0x01,
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0xed, 0x73, 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, 0x00, 0x06,
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0x00, 0x08, 0x00, 0x08, 0x36, 0x9d, 0xd0, 0x11};
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ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk chunk, SackChunk::Parse(data));
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TSN cum_ack_tsn(916312075);
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EXPECT_EQ(chunk.cumulative_tsn_ack(), cum_ack_tsn);
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EXPECT_EQ(chunk.a_rwnd(), 126323u);
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EXPECT_THAT(
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chunk.gap_ack_blocks(),
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ElementsAre(SackChunk::GapAckBlock(
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static_cast<uint16_t>(916312077 - *cum_ack_tsn),
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static_cast<uint16_t>(916312081 - *cum_ack_tsn)),
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SackChunk::GapAckBlock(
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static_cast<uint16_t>(916312083 - *cum_ack_tsn),
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static_cast<uint16_t>(916312083 - *cum_ack_tsn))));
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EXPECT_THAT(chunk.duplicate_tsns(), ElementsAre(TSN(916312081)));
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}
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TEST(SackChunkTest, SerializeAndDeserialize) {
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SackChunk chunk(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(2, 3)},
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{TSN(1), TSN(2), TSN(3)});
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std::vector<uint8_t> serialized;
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chunk.SerializeTo(serialized);
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ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk deserialized,
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SackChunk::Parse(serialized));
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EXPECT_EQ(*deserialized.cumulative_tsn_ack(), 123u);
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EXPECT_EQ(deserialized.a_rwnd(), 456u);
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EXPECT_THAT(deserialized.gap_ack_blocks(),
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ElementsAre(SackChunk::GapAckBlock(2, 3)));
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EXPECT_THAT(deserialized.duplicate_tsns(),
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ElementsAre(TSN(1), TSN(2), TSN(3)));
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EXPECT_EQ(deserialized.ToString(),
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"SACK, cum_ack_tsn=123, a_rwnd=456, gap=125--126, dup_tsns=1,2,3");
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}
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} // namespace
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} // namespace dcsctp
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