| // Copyright (c) 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "quiche/quic/core/batch_writer/quic_gso_batch_writer.h" |
| |
| #include <sys/socket.h> |
| |
| #include <cstdint> |
| #include <limits> |
| #include <memory> |
| #include <utility> |
| |
| #include "quiche/quic/platform/api/quic_ip_address.h" |
| #include "quiche/quic/platform/api/quic_test.h" |
| #include "quiche/quic/test_tools/quic_mock_syscall_wrapper.h" |
| |
| using testing::_; |
| using testing::Invoke; |
| using testing::StrictMock; |
| |
| namespace quic { |
| namespace test { |
| namespace { |
| |
| size_t PacketLength(const msghdr* msg) { |
| size_t length = 0; |
| for (size_t i = 0; i < msg->msg_iovlen; ++i) { |
| length += msg->msg_iov[i].iov_len; |
| } |
| return length; |
| } |
| |
| uint64_t MillisToNanos(uint64_t milliseconds) { return milliseconds * 1000000; } |
| |
| class QUICHE_EXPORT TestQuicGsoBatchWriter : public QuicGsoBatchWriter { |
| public: |
| using QuicGsoBatchWriter::batch_buffer; |
| using QuicGsoBatchWriter::buffered_writes; |
| using QuicGsoBatchWriter::CanBatch; |
| using QuicGsoBatchWriter::CanBatchResult; |
| using QuicGsoBatchWriter::GetReleaseTime; |
| using QuicGsoBatchWriter::MaxSegments; |
| using QuicGsoBatchWriter::QuicGsoBatchWriter; |
| using QuicGsoBatchWriter::ReleaseTime; |
| |
| static std::unique_ptr<TestQuicGsoBatchWriter> |
| NewInstanceWithReleaseTimeSupport() { |
| return std::unique_ptr<TestQuicGsoBatchWriter>(new TestQuicGsoBatchWriter( |
| std::make_unique<QuicBatchWriterBuffer>(), |
| /*fd=*/-1, CLOCK_MONOTONIC, ReleaseTimeForceEnabler())); |
| } |
| |
| uint64_t NowInNanosForReleaseTime() const override { |
| return MillisToNanos(forced_release_time_ms_); |
| } |
| |
| void ForceReleaseTimeMs(uint64_t forced_release_time_ms) { |
| forced_release_time_ms_ = forced_release_time_ms; |
| } |
| |
| private: |
| uint64_t forced_release_time_ms_ = 1; |
| }; |
| |
| // TestBufferedWrite is a copy-constructible BufferedWrite. |
| struct QUICHE_EXPORT TestBufferedWrite : public BufferedWrite { |
| using BufferedWrite::BufferedWrite; |
| TestBufferedWrite(const TestBufferedWrite& other) |
| : BufferedWrite(other.buffer, other.buf_len, other.self_address, |
| other.peer_address, |
| other.options ? other.options->Clone() |
| : std::unique_ptr<PerPacketOptions>(), |
| QuicPacketWriterParams(), other.release_time) {} |
| }; |
| |
| // Pointed to by all instances of |BatchCriteriaTestData|. Content not used. |
| static char unused_packet_buffer[kMaxOutgoingPacketSize]; |
| |
| struct QUICHE_EXPORT BatchCriteriaTestData { |
| BatchCriteriaTestData(size_t buf_len, const QuicIpAddress& self_address, |
| const QuicSocketAddress& peer_address, |
| uint64_t release_time, bool can_batch, bool must_flush) |
| : buffered_write(unused_packet_buffer, buf_len, self_address, |
| peer_address, std::unique_ptr<PerPacketOptions>(), |
| QuicPacketWriterParams(), release_time), |
| can_batch(can_batch), |
| must_flush(must_flush) {} |
| |
| TestBufferedWrite buffered_write; |
| // Expected value of CanBatchResult.can_batch when batching |buffered_write|. |
| bool can_batch; |
| // Expected value of CanBatchResult.must_flush when batching |buffered_write|. |
| bool must_flush; |
| }; |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_SizeDecrease() { |
| const QuicIpAddress self_addr; |
| const QuicSocketAddress peer_addr; |
| std::vector<BatchCriteriaTestData> test_data_table = { |
| // clang-format off |
| // buf_len self_addr peer_addr t_rel can_batch must_flush |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {39, self_addr, peer_addr, 0, true, true}, |
| {39, self_addr, peer_addr, 0, false, true}, |
| {1350, self_addr, peer_addr, 0, false, true}, |
| // clang-format on |
| }; |
| return test_data_table; |
| } |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_SizeIncrease() { |
| const QuicIpAddress self_addr; |
| const QuicSocketAddress peer_addr; |
| std::vector<BatchCriteriaTestData> test_data_table = { |
| // clang-format off |
| // buf_len self_addr peer_addr t_rel can_batch must_flush |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1351, self_addr, peer_addr, 0, false, true}, |
| // clang-format on |
| }; |
| return test_data_table; |
| } |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_AddressChange() { |
| const QuicIpAddress self_addr1 = QuicIpAddress::Loopback4(); |
| const QuicIpAddress self_addr2 = QuicIpAddress::Loopback6(); |
| const QuicSocketAddress peer_addr1(self_addr1, 666); |
| const QuicSocketAddress peer_addr2(self_addr1, 777); |
| const QuicSocketAddress peer_addr3(self_addr2, 666); |
| const QuicSocketAddress peer_addr4(self_addr2, 777); |
| std::vector<BatchCriteriaTestData> test_data_table = { |
| // clang-format off |
| // buf_len self_addr peer_addr t_rel can_batch must_flush |
| {1350, self_addr1, peer_addr1, 0, true, false}, |
| {1350, self_addr1, peer_addr1, 0, true, false}, |
| {1350, self_addr1, peer_addr1, 0, true, false}, |
| {1350, self_addr2, peer_addr1, 0, false, true}, |
| {1350, self_addr1, peer_addr2, 0, false, true}, |
| {1350, self_addr1, peer_addr3, 0, false, true}, |
| {1350, self_addr1, peer_addr4, 0, false, true}, |
| {1350, self_addr1, peer_addr4, 0, false, true}, |
| // clang-format on |
| }; |
| return test_data_table; |
| } |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_ReleaseTime1() { |
| const QuicIpAddress self_addr; |
| const QuicSocketAddress peer_addr; |
| std::vector<BatchCriteriaTestData> test_data_table = { |
| // clang-format off |
| // buf_len self_addr peer_addr t_rel can_batch must_flush |
| {1350, self_addr, peer_addr, 5, true, false}, |
| {1350, self_addr, peer_addr, 5, true, false}, |
| {1350, self_addr, peer_addr, 5, true, false}, |
| {1350, self_addr, peer_addr, 9, false, true}, |
| // clang-format on |
| }; |
| return test_data_table; |
| } |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_ReleaseTime2() { |
| const QuicIpAddress self_addr; |
| const QuicSocketAddress peer_addr; |
| std::vector<BatchCriteriaTestData> test_data_table = { |
| // clang-format off |
| // buf_len self_addr peer_addr t_rel can_batch must_flush |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 0, true, false}, |
| {1350, self_addr, peer_addr, 9, false, true}, |
| // clang-format on |
| }; |
| return test_data_table; |
| } |
| |
| std::vector<BatchCriteriaTestData> BatchCriteriaTestData_MaxSegments( |
| size_t gso_size) { |
| const QuicIpAddress self_addr; |
| const QuicSocketAddress peer_addr; |
| std::vector<BatchCriteriaTestData> test_data_table; |
| size_t max_segments = TestQuicGsoBatchWriter::MaxSegments(gso_size); |
| for (size_t i = 0; i < max_segments; ++i) { |
| bool is_last_in_batch = (i + 1 == max_segments); |
| test_data_table.push_back({gso_size, self_addr, peer_addr, |
| /*release_time=*/0, true, is_last_in_batch}); |
| } |
| test_data_table.push_back( |
| {gso_size, self_addr, peer_addr, /*release_time=*/0, false, true}); |
| return test_data_table; |
| } |
| |
| class QuicGsoBatchWriterTest : public QuicTest { |
| protected: |
| WriteResult WritePacket(QuicGsoBatchWriter* writer, size_t packet_size) { |
| return writer->WritePacket(&packet_buffer_[0], packet_size, self_address_, |
| peer_address_, nullptr, |
| QuicPacketWriterParams()); |
| } |
| |
| WriteResult WritePacketWithParams(QuicGsoBatchWriter* writer, |
| QuicPacketWriterParams& params) { |
| return writer->WritePacket(&packet_buffer_[0], 1350, self_address_, |
| peer_address_, nullptr, params); |
| } |
| |
| QuicIpAddress self_address_ = QuicIpAddress::Any4(); |
| QuicSocketAddress peer_address_{QuicIpAddress::Any4(), 443}; |
| char packet_buffer_[1500]; |
| StrictMock<MockQuicSyscallWrapper> mock_syscalls_; |
| ScopedGlobalSyscallWrapperOverride syscall_override_{&mock_syscalls_}; |
| }; |
| |
| TEST_F(QuicGsoBatchWriterTest, BatchCriteria) { |
| std::unique_ptr<TestQuicGsoBatchWriter> writer; |
| |
| std::vector<std::vector<BatchCriteriaTestData>> test_data_tables; |
| test_data_tables.emplace_back(BatchCriteriaTestData_SizeDecrease()); |
| test_data_tables.emplace_back(BatchCriteriaTestData_SizeIncrease()); |
| test_data_tables.emplace_back(BatchCriteriaTestData_AddressChange()); |
| test_data_tables.emplace_back(BatchCriteriaTestData_ReleaseTime1()); |
| test_data_tables.emplace_back(BatchCriteriaTestData_ReleaseTime2()); |
| test_data_tables.emplace_back(BatchCriteriaTestData_MaxSegments(1)); |
| test_data_tables.emplace_back(BatchCriteriaTestData_MaxSegments(2)); |
| test_data_tables.emplace_back(BatchCriteriaTestData_MaxSegments(1350)); |
| |
| for (size_t i = 0; i < test_data_tables.size(); ++i) { |
| writer = TestQuicGsoBatchWriter::NewInstanceWithReleaseTimeSupport(); |
| |
| const auto& test_data_table = test_data_tables[i]; |
| for (size_t j = 0; j < test_data_table.size(); ++j) { |
| const BatchCriteriaTestData& test_data = test_data_table[j]; |
| SCOPED_TRACE(testing::Message() << "i=" << i << ", j=" << j); |
| QuicPacketWriterParams params; |
| params.release_time_delay = QuicTime::Delta::FromMicroseconds( |
| test_data.buffered_write.release_time); |
| TestQuicGsoBatchWriter::CanBatchResult result = writer->CanBatch( |
| test_data.buffered_write.buffer, test_data.buffered_write.buf_len, |
| test_data.buffered_write.self_address, |
| test_data.buffered_write.peer_address, nullptr, params, |
| test_data.buffered_write.release_time); |
| |
| ASSERT_EQ(test_data.can_batch, result.can_batch); |
| ASSERT_EQ(test_data.must_flush, result.must_flush); |
| |
| if (result.can_batch) { |
| ASSERT_TRUE(writer->batch_buffer() |
| .PushBufferedWrite( |
| test_data.buffered_write.buffer, |
| test_data.buffered_write.buf_len, |
| test_data.buffered_write.self_address, |
| test_data.buffered_write.peer_address, nullptr, |
| params, test_data.buffered_write.release_time) |
| .succeeded); |
| } |
| } |
| } |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, WriteSuccess) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 1000)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(1100u, PacketLength(msg)); |
| return 1100; |
| })); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 1100), WritePacket(&writer, 100)); |
| ASSERT_EQ(0u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(0u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, WriteBlockDataNotBuffered) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(200u, PacketLength(msg)); |
| errno = EWOULDBLOCK; |
| return -1; |
| })); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_BLOCKED, EWOULDBLOCK), |
| WritePacket(&writer, 150)); |
| ASSERT_EQ(200u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(2u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, WriteBlockDataBuffered) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(250u, PacketLength(msg)); |
| errno = EWOULDBLOCK; |
| return -1; |
| })); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_BLOCKED_DATA_BUFFERED, EWOULDBLOCK), |
| WritePacket(&writer, 50)); |
| |
| EXPECT_TRUE(writer.IsWriteBlocked()); |
| |
| ASSERT_EQ(250u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(3u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, WriteErrorWithoutDataBuffered) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(200u, PacketLength(msg)); |
| errno = EPERM; |
| return -1; |
| })); |
| WriteResult error_result = WritePacket(&writer, 150); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_ERROR, EPERM), error_result); |
| |
| ASSERT_EQ(3u, error_result.dropped_packets); |
| ASSERT_EQ(0u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(0u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, WriteErrorAfterDataBuffered) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(250u, PacketLength(msg)); |
| errno = EPERM; |
| return -1; |
| })); |
| WriteResult error_result = WritePacket(&writer, 50); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_ERROR, EPERM), error_result); |
| |
| ASSERT_EQ(3u, error_result.dropped_packets); |
| ASSERT_EQ(0u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(0u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, FlushError) { |
| TestQuicGsoBatchWriter writer(/*fd=*/-1); |
| |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 0), WritePacket(&writer, 100)); |
| |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(200u, PacketLength(msg)); |
| errno = EINVAL; |
| return -1; |
| })); |
| WriteResult error_result = writer.Flush(); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_ERROR, EINVAL), error_result); |
| |
| ASSERT_EQ(2u, error_result.dropped_packets); |
| ASSERT_EQ(0u, writer.batch_buffer().SizeInUse()); |
| ASSERT_EQ(0u, writer.buffered_writes().size()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, ReleaseTime) { |
| const WriteResult write_buffered(WRITE_STATUS_OK, 0); |
| |
| auto writer = TestQuicGsoBatchWriter::NewInstanceWithReleaseTimeSupport(); |
| |
| QuicPacketWriterParams params; |
| EXPECT_TRUE(params.release_time_delay.IsZero()); |
| EXPECT_FALSE(params.allow_burst); |
| EXPECT_EQ(MillisToNanos(1), |
| writer->GetReleaseTime(params).actual_release_time); |
| |
| // The 1st packet has no delay. |
| WriteResult result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(1), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| |
| // The 2nd packet has some delay, but allows burst. |
| params.release_time_delay = QuicTime::Delta::FromMilliseconds(3); |
| params.allow_burst = true; |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(1), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::FromMilliseconds(-3)); |
| |
| // The 3rd packet has more delay and does not allow burst. |
| // The first 2 packets are flushed due to different release time. |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(2700u, PacketLength(msg)); |
| errno = 0; |
| return 0; |
| })); |
| params.release_time_delay = QuicTime::Delta::FromMilliseconds(5); |
| params.allow_burst = false; |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 2700), result); |
| EXPECT_EQ(MillisToNanos(6), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| |
| // The 4th packet has same delay, but allows burst. |
| params.allow_burst = true; |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(6), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| |
| // The 5th packet has same delay, allows burst, but is shorter. |
| // Packets 3,4 and 5 are flushed. |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| EXPECT_EQ(3000u, PacketLength(msg)); |
| errno = 0; |
| return 0; |
| })); |
| params.allow_burst = true; |
| EXPECT_EQ(MillisToNanos(6), |
| writer->GetReleaseTime(params).actual_release_time); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 3000), |
| writer->WritePacket(&packet_buffer_[0], 300, self_address_, |
| peer_address_, nullptr, params)); |
| EXPECT_TRUE(writer->buffered_writes().empty()); |
| |
| // Pretend 1ms has elapsed and the 6th packet has 1ms less delay. In other |
| // words, the release time should still be the same as packets 3-5. |
| writer->ForceReleaseTimeMs(2); |
| params.release_time_delay = QuicTime::Delta::FromMilliseconds(4); |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(6), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, EcnCodepoint) { |
| const WriteResult write_buffered(WRITE_STATUS_OK, 0); |
| |
| auto writer = TestQuicGsoBatchWriter::NewInstanceWithReleaseTimeSupport(); |
| |
| QuicPacketWriterParams params; |
| EXPECT_TRUE(params.release_time_delay.IsZero()); |
| EXPECT_FALSE(params.allow_burst); |
| params.ecn_codepoint = ECN_ECT0; |
| |
| // The 1st packet has no delay. |
| WriteResult result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(1), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| |
| // The 2nd packet should be buffered. |
| params.allow_burst = true; |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| |
| // The 3rd packet changes the ECN codepoint. |
| // The first 2 packets are flushed due to different codepoint. |
| params.ecn_codepoint = ECN_ECT1; |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| const int kEct0 = 0x02; |
| EXPECT_EQ(2700u, PacketLength(msg)); |
| msghdr mutable_msg; |
| memcpy(&mutable_msg, msg, sizeof(*msg)); |
| for (struct cmsghdr* cmsg = CMSG_FIRSTHDR(&mutable_msg); cmsg != NULL; |
| cmsg = CMSG_NXTHDR(&mutable_msg, cmsg)) { |
| if (cmsg->cmsg_level == IPPROTO_IP && cmsg->cmsg_type == IP_TOS) { |
| EXPECT_EQ(*reinterpret_cast<int*> CMSG_DATA(cmsg), kEct0); |
| break; |
| } |
| } |
| errno = 0; |
| return 0; |
| })); |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 2700), result); |
| } |
| |
| TEST_F(QuicGsoBatchWriterTest, EcnCodepointIPv6) { |
| const WriteResult write_buffered(WRITE_STATUS_OK, 0); |
| |
| self_address_ = QuicIpAddress::Any6(); |
| peer_address_ = QuicSocketAddress(QuicIpAddress::Any6(), 443); |
| auto writer = TestQuicGsoBatchWriter::NewInstanceWithReleaseTimeSupport(); |
| |
| QuicPacketWriterParams params; |
| EXPECT_TRUE(params.release_time_delay.IsZero()); |
| EXPECT_FALSE(params.allow_burst); |
| params.ecn_codepoint = ECN_ECT0; |
| |
| // The 1st packet has no delay. |
| WriteResult result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| EXPECT_EQ(MillisToNanos(1), writer->buffered_writes().back().release_time); |
| EXPECT_EQ(result.send_time_offset, QuicTime::Delta::Zero()); |
| |
| // The 2nd packet should be buffered. |
| params.allow_burst = true; |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(write_buffered, result); |
| |
| // The 3rd packet changes the ECN codepoint. |
| // The first 2 packets are flushed due to different codepoint. |
| params.ecn_codepoint = ECN_ECT1; |
| EXPECT_CALL(mock_syscalls_, Sendmsg(_, _, _)) |
| .WillOnce(Invoke([](int /*sockfd*/, const msghdr* msg, int /*flags*/) { |
| const int kEct0 = 0x02; |
| EXPECT_EQ(2700u, PacketLength(msg)); |
| msghdr mutable_msg; |
| memcpy(&mutable_msg, msg, sizeof(*msg)); |
| for (struct cmsghdr* cmsg = CMSG_FIRSTHDR(&mutable_msg); cmsg != NULL; |
| cmsg = CMSG_NXTHDR(&mutable_msg, cmsg)) { |
| if (cmsg->cmsg_level == IPPROTO_IPV6 && |
| cmsg->cmsg_type == IPV6_TCLASS) { |
| EXPECT_EQ(*reinterpret_cast<int*> CMSG_DATA(cmsg), kEct0); |
| break; |
| } |
| } |
| errno = 0; |
| return 0; |
| })); |
| result = WritePacketWithParams(writer.get(), params); |
| ASSERT_EQ(WriteResult(WRITE_STATUS_OK, 2700), result); |
| } |
| |
| } // namespace |
| } // namespace test |
| } // namespace quic |
