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