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// Copyright (c) 2014 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_client.h"
#include <dirent.h>
#include <stdio.h>
#include <memory>
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "net/quic/platform/api/quic_test.h"
#include "net/quic/platform/api/quic_test_loopback.h"
#include "net/quic/platform/api/quic_text_utils.h"
#include "net/quic/test_tools/crypto_test_utils.h"
#include "net/quic/test_tools/quic_test_utils.h"
#include "net/tools/epoll_server/epoll_server.h"
#include "net/tools/quic/test_tools/quic_client_peer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace test {
namespace {
const char* kPathToFds = "/proc/self/fd";
// Counts the number of open sockets for the current process.
size_t NumOpenSocketFDs() {
base::FileEnumerator fd_entries(
base::FilePath(kPathToFds), false,
base::FileEnumerator::FILES | base::FileEnumerator::SHOW_SYM_LINKS);
size_t socket_count = 0;
for (base::FilePath entry = fd_entries.Next(); !entry.empty();
entry = fd_entries.Next()) {
base::FilePath fd_path;
if (!base::ReadSymbolicLink(entry, &fd_path)) {
continue;
}
if (QuicTextUtils::StartsWith(fd_path.value(), "socket:")) {
socket_count++;
}
}
return socket_count;
}
// Creates a new QuicClient and Initializes it. Caller is responsible for
// deletion.
QuicClient* CreateAndInitializeQuicClient(EpollServer* eps, uint16_t port) {
QuicSocketAddress server_address(QuicSocketAddress(TestLoopback(), port));
QuicServerId server_id("hostname", server_address.port(),
PRIVACY_MODE_DISABLED);
QuicVersionVector versions = AllSupportedVersions();
QuicClient* client =
new QuicClient(server_address, server_id, versions, eps,
crypto_test_utils::ProofVerifierForTesting());
EXPECT_TRUE(client->Initialize());
return client;
}
class QuicClientTest : public QuicTest {};
TEST_F(QuicClientTest, DoNotLeakSocketFDs) {
// Make sure that the QuicClient doesn't leak socket FDs. Doing so could cause
// port exhaustion in long running processes which repeatedly create clients.
// Create a ProofVerifier before counting the number of open FDs to work
// around some ASAN weirdness.
crypto_test_utils::ProofVerifierForTesting().reset();
// Record initial number of FDs, after creation of EpollServer.
EpollServer eps;
size_t number_of_open_fds = NumOpenSocketFDs();
// Create a number of clients, initialize them, and verify this has resulted
// in additional FDs being opened.
const int kNumClients = 50;
for (int i = 0; i < kNumClients; ++i) {
std::unique_ptr<QuicClient> client(
CreateAndInitializeQuicClient(&eps, net::test::kTestPort + i));
// Initializing the client will create a new FD.
EXPECT_LT(number_of_open_fds, NumOpenSocketFDs());
}
// The FDs created by the QuicClients should now be closed.
EXPECT_EQ(number_of_open_fds, NumOpenSocketFDs());
}
TEST_F(QuicClientTest, CreateAndCleanUpUDPSockets) {
// Create a ProofVerifier before counting the number of open FDs to work
// around some ASAN weirdness.
crypto_test_utils::ProofVerifierForTesting().reset();
EpollServer eps;
size_t number_of_open_fds = NumOpenSocketFDs();
std::unique_ptr<QuicClient> client(
CreateAndInitializeQuicClient(&eps, net::test::kTestPort));
EXPECT_EQ(number_of_open_fds + 1, NumOpenSocketFDs());
// Create more UDP sockets.
EXPECT_TRUE(QuicClientPeer::CreateUDPSocketAndBind(client.get()));
EXPECT_EQ(number_of_open_fds + 2, NumOpenSocketFDs());
EXPECT_TRUE(QuicClientPeer::CreateUDPSocketAndBind(client.get()));
EXPECT_EQ(number_of_open_fds + 3, NumOpenSocketFDs());
// Clean up UDP sockets.
QuicClientPeer::CleanUpUDPSocket(client.get(), client->GetLatestFD());
EXPECT_EQ(number_of_open_fds + 2, NumOpenSocketFDs());
QuicClientPeer::CleanUpUDPSocket(client.get(), client->GetLatestFD());
EXPECT_EQ(number_of_open_fds + 1, NumOpenSocketFDs());
}
} // namespace
} // namespace test
} // namespace net
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