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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/tlv_trait.h"
#include <vector>
#include "api/array_view.h"
#include "rtc_base/buffer.h"
#include "rtc_base/checks.h"
#include "rtc_base/gunit.h"
#include "test/gmock.h"
namespace dcsctp {
namespace {
using ::testing::ElementsAre;
using ::testing::SizeIs;
struct OneByteTypeConfig {
static constexpr int kTypeSizeInBytes = 1;
static constexpr int kType = 0x49;
static constexpr size_t kHeaderSize = 12;
static constexpr int kVariableLengthAlignment = 4;
};
class OneByteChunk : public TLVTrait<OneByteTypeConfig> {
public:
static constexpr size_t kVariableSize = 4;
void SerializeTo(std::vector<uint8_t>& out) {
BoundedByteWriter<OneByteTypeConfig::kHeaderSize> writer =
AllocateTLV(out, kVariableSize);
writer.Store32<4>(0x01020304);
writer.Store16<8>(0x0506);
writer.Store16<10>(0x0708);
uint8_t variable_data[kVariableSize] = {0xDE, 0xAD, 0xBE, 0xEF};
writer.CopyToVariableData(rtc::ArrayView<const uint8_t>(variable_data));
}
static absl::optional<BoundedByteReader<OneByteTypeConfig::kHeaderSize>>
Parse(rtc::ArrayView<const uint8_t> data) {
return ParseTLV(data);
}
};
TEST(TlvDataTest, CanWriteOneByteTypeTlvs) {
std::vector<uint8_t> out;
OneByteChunk().SerializeTo(out);
EXPECT_THAT(out, SizeIs(OneByteTypeConfig::kHeaderSize +
OneByteChunk::kVariableSize));
EXPECT_THAT(out, ElementsAre(0x49, 0x00, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF));
}
TEST(TlvDataTest, CanReadOneByteTypeTlvs) {
uint8_t data[] = {0x49, 0x00, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF};
absl::optional<BoundedByteReader<OneByteTypeConfig::kHeaderSize>> reader =
OneByteChunk::Parse(data);
ASSERT_TRUE(reader.has_value());
EXPECT_EQ(reader->Load32<4>(), 0x01020304U);
EXPECT_EQ(reader->Load16<8>(), 0x0506U);
EXPECT_EQ(reader->Load16<10>(), 0x0708U);
EXPECT_THAT(reader->variable_data(), ElementsAre(0xDE, 0xAD, 0xBE, 0xEF));
}
struct TwoByteTypeConfig {
static constexpr int kTypeSizeInBytes = 2;
static constexpr int kType = 31337;
static constexpr size_t kHeaderSize = 8;
static constexpr int kVariableLengthAlignment = 2;
};
class TwoByteChunk : public TLVTrait<TwoByteTypeConfig> {
public:
static constexpr size_t kVariableSize = 8;
void SerializeTo(std::vector<uint8_t>& out) {
BoundedByteWriter<TwoByteTypeConfig::kHeaderSize> writer =
AllocateTLV(out, kVariableSize);
writer.Store32<4>(0x01020304U);
uint8_t variable_data[] = {0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF};
writer.CopyToVariableData(rtc::ArrayView<const uint8_t>(variable_data));
}
static absl::optional<BoundedByteReader<TwoByteTypeConfig::kHeaderSize>>
Parse(rtc::ArrayView<const uint8_t> data) {
return ParseTLV(data);
}
};
TEST(TlvDataTest, CanWriteTwoByteTypeTlvs) {
std::vector<uint8_t> out;
TwoByteChunk().SerializeTo(out);
EXPECT_THAT(out, SizeIs(TwoByteTypeConfig::kHeaderSize +
TwoByteChunk::kVariableSize));
EXPECT_THAT(out, ElementsAre(0x7A, 0x69, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF));
}
TEST(TlvDataTest, CanReadTwoByteTypeTlvs) {
uint8_t data[] = {0x7A, 0x69, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF};
absl::optional<BoundedByteReader<TwoByteTypeConfig::kHeaderSize>> reader =
TwoByteChunk::Parse(data);
EXPECT_TRUE(reader.has_value());
EXPECT_EQ(reader->Load32<4>(), 0x01020304U);
EXPECT_THAT(reader->variable_data(),
ElementsAre(0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF));
}
TEST(TlvDataTest, CanHandleInvalidLengthSmallerThanFixedSize) {
// Has 'length=6', which is below the kHeaderSize of 8.
uint8_t data[] = {0x7A, 0x69, 0x00, 0x06, 0x01, 0x02, 0x03, 0x04};
EXPECT_FALSE(TwoByteChunk::Parse(data).has_value());
}
} // namespace
} // namespace dcsctp
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