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// Copyright 2013 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 "quic/tools/quic_server.h"
#include "absl/base/macros.h"
#include "quic/core/crypto/quic_random.h"
#include "quic/core/quic_epoll_alarm_factory.h"
#include "quic/core/quic_epoll_connection_helper.h"
#include "quic/core/quic_utils.h"
#include "quic/platform/api/quic_flags.h"
#include "quic/platform/api/quic_logging.h"
#include "quic/platform/api/quic_port_utils.h"
#include "quic/platform/api/quic_socket_address.h"
#include "quic/platform/api/quic_test.h"
#include "quic/platform/api/quic_test_loopback.h"
#include "quic/test_tools/crypto_test_utils.h"
#include "quic/test_tools/mock_quic_dispatcher.h"
#include "quic/test_tools/quic_server_peer.h"
#include "quic/tools/quic_memory_cache_backend.h"
#include "quic/tools/quic_simple_crypto_server_stream_helper.h"
namespace quic {
namespace test {
using ::testing::_;
namespace {
class MockQuicSimpleDispatcher : public QuicSimpleDispatcher {
public:
MockQuicSimpleDispatcher(
const QuicConfig* config,
const QuicCryptoServerConfig* crypto_config,
QuicVersionManager* version_manager,
std::unique_ptr<QuicConnectionHelperInterface> helper,
std::unique_ptr<QuicCryptoServerStreamBase::Helper> session_helper,
std::unique_ptr<QuicAlarmFactory> alarm_factory,
QuicSimpleServerBackend* quic_simple_server_backend)
: QuicSimpleDispatcher(config,
crypto_config,
version_manager,
std::move(helper),
std::move(session_helper),
std::move(alarm_factory),
quic_simple_server_backend,
kQuicDefaultConnectionIdLength) {}
~MockQuicSimpleDispatcher() override = default;
MOCK_METHOD(void, OnCanWrite, (), (override));
MOCK_METHOD(bool, HasPendingWrites, (), (const, override));
MOCK_METHOD(bool, HasChlosBuffered, (), (const, override));
MOCK_METHOD(void, ProcessBufferedChlos, (size_t), (override));
};
class TestQuicServer : public QuicServer {
public:
TestQuicServer()
: QuicServer(crypto_test_utils::ProofSourceForTesting(),
&quic_simple_server_backend_) {}
~TestQuicServer() override = default;
MockQuicSimpleDispatcher* mock_dispatcher() { return mock_dispatcher_; }
protected:
QuicDispatcher* CreateQuicDispatcher() override {
mock_dispatcher_ = new MockQuicSimpleDispatcher(
&config(), &crypto_config(), version_manager(),
std::unique_ptr<QuicEpollConnectionHelper>(
new QuicEpollConnectionHelper(epoll_server(),
QuicAllocator::BUFFER_POOL)),
std::unique_ptr<QuicCryptoServerStreamBase::Helper>(
new QuicSimpleCryptoServerStreamHelper()),
std::unique_ptr<QuicEpollAlarmFactory>(
new QuicEpollAlarmFactory(epoll_server())),
&quic_simple_server_backend_);
return mock_dispatcher_;
}
MockQuicSimpleDispatcher* mock_dispatcher_ = nullptr;
QuicMemoryCacheBackend quic_simple_server_backend_;
};
class QuicServerEpollInTest : public QuicTest {
public:
QuicServerEpollInTest()
: port_(QuicPickServerPortForTestsOrDie()),
server_address_(TestLoopback(), port_) {}
void StartListening() {
server_.CreateUDPSocketAndListen(server_address_);
server_address_ = QuicSocketAddress(server_address_.host(), server_.port());
ASSERT_TRUE(QuicServerPeer::SetSmallSocket(&server_));
if (!server_.overflow_supported()) {
QUIC_LOG(WARNING) << "Overflow not supported. Not testing.";
return;
}
}
protected:
int port_;
QuicSocketAddress server_address_;
TestQuicServer server_;
};
// Tests that if dispatcher has CHLOs waiting for connection creation, EPOLLIN
// event should try to create connections for them. And set epoll mask with
// EPOLLIN if there are still CHLOs remaining at the end of epoll event.
TEST_F(QuicServerEpollInTest, ProcessBufferedCHLOsOnEpollin) {
// Given an EPOLLIN event, try to create session for buffered CHLOs. In first
// event, dispatcher can't create session for all of CHLOs. So listener should
// register another EPOLLIN event by itself. Even without new packet arrival,
// the rest CHLOs should be process in next epoll event.
StartListening();
bool more_chlos = true;
MockQuicSimpleDispatcher* dispatcher_ = server_.mock_dispatcher();
QUICHE_DCHECK(dispatcher_ != nullptr);
EXPECT_CALL(*dispatcher_, OnCanWrite()).Times(testing::AnyNumber());
EXPECT_CALL(*dispatcher_, ProcessBufferedChlos(_)).Times(2);
EXPECT_CALL(*dispatcher_, HasPendingWrites()).Times(testing::AnyNumber());
// Expect there are still CHLOs buffered after 1st event. But not any more
// after 2nd event.
EXPECT_CALL(*dispatcher_, HasChlosBuffered())
.WillOnce(testing::Return(true))
.WillOnce(
DoAll(testing::Assign(&more_chlos, false), testing::Return(false)));
// Send a packet to trigger epoll event.
int fd = socket(
AddressFamilyUnderTest() == IpAddressFamily::IP_V4 ? AF_INET : AF_INET6,
SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP);
ASSERT_LT(0, fd);
char buf[1024];
memset(buf, 0, ABSL_ARRAYSIZE(buf));
sockaddr_storage storage = server_address_.generic_address();
int rc = sendto(fd, buf, ABSL_ARRAYSIZE(buf), 0,
reinterpret_cast<sockaddr*>(&storage), sizeof(storage));
if (rc < 0) {
QUIC_DLOG(INFO) << errno << " " << strerror(errno);
}
while (more_chlos) {
server_.WaitForEvents();
}
}
class QuicServerDispatchPacketTest : public QuicTest {
public:
QuicServerDispatchPacketTest()
: crypto_config_("blah",
QuicRandom::GetInstance(),
crypto_test_utils::ProofSourceForTesting(),
KeyExchangeSource::Default()),
version_manager_(AllSupportedVersions()),
dispatcher_(
&config_,
&crypto_config_,
&version_manager_,
std::unique_ptr<QuicEpollConnectionHelper>(
new QuicEpollConnectionHelper(&eps_,
QuicAllocator::BUFFER_POOL)),
std::unique_ptr<QuicCryptoServerStreamBase::Helper>(
new QuicSimpleCryptoServerStreamHelper()),
std::unique_ptr<QuicEpollAlarmFactory>(
new QuicEpollAlarmFactory(&eps_)),
&quic_simple_server_backend_) {
dispatcher_.InitializeWithWriter(new QuicDefaultPacketWriter(1234));
}
void DispatchPacket(const QuicReceivedPacket& packet) {
QuicSocketAddress client_addr, server_addr;
dispatcher_.ProcessPacket(server_addr, client_addr, packet);
}
protected:
QuicConfig config_;
QuicCryptoServerConfig crypto_config_;
QuicVersionManager version_manager_;
QuicEpollServer eps_;
QuicMemoryCacheBackend quic_simple_server_backend_;
MockQuicDispatcher dispatcher_;
};
TEST_F(QuicServerDispatchPacketTest, DispatchPacket) {
// clang-format off
unsigned char valid_packet[] = {
// public flags (8 byte connection_id)
0x3C,
// connection_id
0x10, 0x32, 0x54, 0x76,
0x98, 0xBA, 0xDC, 0xFE,
// packet number
0xBC, 0x9A, 0x78, 0x56,
0x34, 0x12,
// private flags
0x00
};
// clang-format on
QuicReceivedPacket encrypted_valid_packet(
reinterpret_cast<char*>(valid_packet), ABSL_ARRAYSIZE(valid_packet),
QuicTime::Zero(), false);
EXPECT_CALL(dispatcher_, ProcessPacket(_, _, _)).Times(1);
DispatchPacket(encrypted_valid_packet);
}
} // namespace
} // namespace test
} // namespace quic
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