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// Copyright (c) 2012 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 "net/tools/quic/quic_epoll_connection_helper.h"
#include "net/quic/crypto/crypto_protocol.h"
#include "net/quic/crypto/quic_decrypter.h"
#include "net/quic/crypto/quic_encrypter.h"
#include "net/quic/crypto/quic_random.h"
#include "net/quic/quic_framer.h"
#include "net/quic/test_tools/quic_connection_peer.h"
#include "net/quic/test_tools/quic_test_utils.h"
#include "net/tools/quic/test_tools/mock_epoll_server.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using net::test::GetMinStreamFrameSize;
using net::test::FramerVisitorCapturingFrames;
using net::test::MockSendAlgorithm;
using net::test::QuicConnectionPeer;
using net::test::MockConnectionVisitor;
using net::tools::test::MockEpollServer;
using testing::_;
using testing::Return;
namespace net {
namespace tools {
namespace test {
namespace {
const char data1[] = "foo";
const bool kFromPeer = true;
class TestConnectionHelper : public QuicEpollConnectionHelper {
public:
TestConnectionHelper(int fd, EpollServer* eps)
: QuicEpollConnectionHelper(fd, eps) {
}
virtual int WritePacketToWire(const QuicEncryptedPacket& packet,
int* error) OVERRIDE {
QuicFramer framer(QuicVersionMax(), QuicTime::Zero(), true);
FramerVisitorCapturingFrames visitor;
framer.set_visitor(&visitor);
EXPECT_TRUE(framer.ProcessPacket(packet));
header_ = *visitor.header();
*error = 0;
return packet.length();
}
QuicPacketHeader* header() { return &header_; }
private:
QuicPacketHeader header_;
};
class TestConnection : public QuicConnection {
public:
TestConnection(QuicGuid guid,
IPEndPoint address,
TestConnectionHelper* helper)
: QuicConnection(guid, address, helper, false, QuicVersionMax()) {
}
void SendAck() {
QuicConnectionPeer::SendAck(this);
}
void SetSendAlgorithm(SendAlgorithmInterface* send_algorithm) {
QuicConnectionPeer::SetSendAlgorithm(this, send_algorithm);
}
using QuicConnection::SendOrQueuePacket;
};
class QuicEpollConnectionHelperTest : public ::testing::Test {
protected:
QuicEpollConnectionHelperTest()
: guid_(42),
framer_(QuicVersionMax(), QuicTime::Zero(), false),
send_algorithm_(new testing::StrictMock<MockSendAlgorithm>),
helper_(new TestConnectionHelper(0, &epoll_server_)),
connection_(guid_, IPEndPoint(), helper_),
frame1_(1, false, 0, data1) {
connection_.set_visitor(&visitor_);
connection_.SetSendAlgorithm(send_algorithm_);
epoll_server_.set_timeout_in_us(-1);
EXPECT_CALL(*send_algorithm_, TimeUntilSend(_, _, _, _)).
WillRepeatedly(Return(QuicTime::Delta::Zero()));
}
QuicPacket* ConstructDataPacket(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group) {
header_.public_header.version_flag = false;
header_.public_header.reset_flag = false;
header_.fec_flag = false;
header_.entropy_flag = false;
header_.packet_sequence_number = number;
header_.is_in_fec_group = fec_group == 0 ? NOT_IN_FEC_GROUP : IN_FEC_GROUP;
header_.fec_group = fec_group;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
return framer_.BuildUnsizedDataPacket(header_, frames).packet;
}
QuicGuid guid_;
QuicFramer framer_;
MockEpollServer epoll_server_;
testing::StrictMock<MockSendAlgorithm>* send_algorithm_;
TestConnectionHelper* helper_;
TestConnection connection_;
testing::StrictMock<MockConnectionVisitor> visitor_;
QuicPacketHeader header_;
QuicStreamFrame frame1_;
};
TEST_F(QuicEpollConnectionHelperTest, DISABLED_TestRetransmission) {
//FLAGS_fake_packet_loss_percentage = 100;
EXPECT_CALL(*send_algorithm_, RetransmissionDelay()).WillRepeatedly(
Return(QuicTime::Delta::Zero()));
const int64 kDefaultRetransmissionTimeMs = 500;
const char buffer[] = "foo";
const size_t packet_size =
GetPacketHeaderSize(PACKET_8BYTE_GUID, kIncludeVersion,
PACKET_6BYTE_SEQUENCE_NUMBER, NOT_IN_FEC_GROUP) +
GetMinStreamFrameSize(framer_.version()) + arraysize(buffer) - 1;
EXPECT_CALL(*send_algorithm_,
SentPacket(_, 1, packet_size, NOT_RETRANSMISSION));
EXPECT_CALL(*send_algorithm_, AbandoningPacket(1, packet_size));
connection_.SendStreamData(1, buffer, 0, false);
EXPECT_EQ(1u, helper_->header()->packet_sequence_number);
EXPECT_CALL(*send_algorithm_,
SentPacket(_, 2, packet_size, IS_RETRANSMISSION));
epoll_server_.AdvanceByAndCallCallbacks(kDefaultRetransmissionTimeMs * 1000);
EXPECT_EQ(2u, helper_->header()->packet_sequence_number);
}
TEST_F(QuicEpollConnectionHelperTest, InitialTimeout) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SentPacket(_, 1, _, NOT_RETRANSMISSION));
EXPECT_CALL(visitor_, ConnectionClose(QUIC_CONNECTION_TIMED_OUT, !kFromPeer));
epoll_server_.WaitForEventsAndExecuteCallbacks();
EXPECT_FALSE(connection_.connected());
EXPECT_EQ(kDefaultInitialTimeoutSecs * 1000000, epoll_server_.NowInUsec());
}
TEST_F(QuicEpollConnectionHelperTest, TimeoutAfterSend) {
EXPECT_TRUE(connection_.connected());
EXPECT_EQ(0, epoll_server_.NowInUsec());
// When we send a packet, the timeout will change to 5000 +
// kDefaultInitialTimeoutSecs.
epoll_server_.AdvanceBy(5000);
EXPECT_EQ(5000, epoll_server_.NowInUsec());
// Send an ack so we don't set the retransmission alarm.
EXPECT_CALL(*send_algorithm_, SentPacket(_, 1, _, NOT_RETRANSMISSION));
connection_.SendAck();
// The original alarm will fire. We should not time out because we had a
// network event at t=5000. The alarm will reregister.
epoll_server_.WaitForEventsAndExecuteCallbacks();
EXPECT_EQ(kDefaultInitialTimeoutSecs * 1000000, epoll_server_.NowInUsec());
// This time, we should time out.
EXPECT_CALL(visitor_, ConnectionClose(QUIC_CONNECTION_TIMED_OUT, !kFromPeer));
EXPECT_CALL(*send_algorithm_, SentPacket(_, 2, _, NOT_RETRANSMISSION));
epoll_server_.WaitForEventsAndExecuteCallbacks();
EXPECT_EQ(kDefaultInitialTimeoutSecs * 1000000 + 5000,
epoll_server_.NowInUsec());
EXPECT_FALSE(connection_.connected());
}
TEST_F(QuicEpollConnectionHelperTest, SendSchedulerDelayThenSend) {
// Test that if we send a packet with a delay, it ends up queued.
EXPECT_CALL(*send_algorithm_, RetransmissionDelay()).WillRepeatedly(
Return(QuicTime::Delta::Zero()));
QuicPacket* packet = ConstructDataPacket(1, 0);
EXPECT_CALL(
*send_algorithm_, TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
connection_.SendOrQueuePacket(ENCRYPTION_NONE, 1, packet, 0,
HAS_RETRANSMITTABLE_DATA);
EXPECT_CALL(*send_algorithm_, SentPacket(_, 1, _, NOT_RETRANSMISSION));
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Advance the clock to fire the alarm, and configure the scheduler
// to permit the packet to be sent.
EXPECT_CALL(*send_algorithm_, TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).
WillRepeatedly(testing::Return(QuicTime::Delta::Zero()));
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(testing::Return(true));
epoll_server_.AdvanceByAndCallCallbacks(1);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
} // namespace
} // namespace test
} // namespace tools
} // namespace net
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