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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <poll.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/ip_socket_test_util.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
// Test fixture for tests that apply to pairs of connected sockets.
using ConnectStressTest = SocketPairTest;
TEST_P(ConnectStressTest, Reset65kTimes) {
// TODO(b/165912341): These are too slow on KVM platform with nested virt.
SKIP_IF(GvisorPlatform() == Platform::kKVM);
for (int i = 0; i < 1 << 16; ++i) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
// Send some data to ensure that the connection gets reset and the port gets
// released immediately. This avoids either end entering TIME-WAIT.
char sent_data[100] = {};
ASSERT_THAT(write(sockets->first_fd(), sent_data, sizeof(sent_data)),
SyscallSucceedsWithValue(sizeof(sent_data)));
// Poll the other FD to make sure that the data is in the receive buffer
// before closing it to ensure a RST is triggered.
const int kTimeout = 10000;
struct pollfd pfd = {
.fd = sockets->second_fd(),
.events = POLL_IN,
};
ASSERT_THAT(poll(&pfd, 1, kTimeout), SyscallSucceedsWithValue(1));
}
}
INSTANTIATE_TEST_SUITE_P(
AllConnectedSockets, ConnectStressTest,
::testing::Values(IPv6UDPBidirectionalBindSocketPair(0),
IPv4UDPBidirectionalBindSocketPair(0),
DualStackUDPBidirectionalBindSocketPair(0),
// Without REUSEADDR, we get port exhaustion on Linux.
SetSockOpt(SOL_SOCKET, SO_REUSEADDR,
&kSockOptOn)(IPv6TCPAcceptBindSocketPair(0)),
SetSockOpt(SOL_SOCKET, SO_REUSEADDR,
&kSockOptOn)(IPv4TCPAcceptBindSocketPair(0)),
SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &kSockOptOn)(
DualStackTCPAcceptBindSocketPair(0))));
// Test fixture for tests that apply to pairs of connected sockets created with
// a persistent listener (if applicable).
using PersistentListenerConnectStressTest = SocketPairTest;
TEST_P(PersistentListenerConnectStressTest, 65kTimesShutdownCloseFirst) {
// TODO(b/165912341): These are too slow on KVM platform with nested virt.
SKIP_IF(GvisorPlatform() == Platform::kKVM);
for (int i = 0; i < 1 << 16; ++i) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(shutdown(sockets->first_fd(), SHUT_RDWR), SyscallSucceeds());
if (GetParam().type == SOCK_STREAM) {
// Poll the other FD to make sure that we see the FIN from the other
// side before closing the second_fd. This ensures that the first_fd
// enters TIME-WAIT and not second_fd.
const int kTimeout = 10000;
struct pollfd pfd = {
.fd = sockets->second_fd(),
.events = POLL_IN,
};
ASSERT_THAT(poll(&pfd, 1, kTimeout), SyscallSucceedsWithValue(1));
}
ASSERT_THAT(shutdown(sockets->second_fd(), SHUT_RDWR), SyscallSucceeds());
}
}
TEST_P(PersistentListenerConnectStressTest, 65kTimesShutdownCloseSecond) {
// TODO(b/165912341): These are too slow on KVM platform with nested virt.
SKIP_IF(GvisorPlatform() == Platform::kKVM);
for (int i = 0; i < 1 << 16; ++i) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(shutdown(sockets->second_fd(), SHUT_RDWR), SyscallSucceeds());
if (GetParam().type == SOCK_STREAM) {
// Poll the other FD to make sure that we see the FIN from the other
// side before closing the first_fd. This ensures that the second_fd
// enters TIME-WAIT and not first_fd.
const int kTimeout = 10000;
struct pollfd pfd = {
.fd = sockets->first_fd(),
.events = POLL_IN,
};
ASSERT_THAT(poll(&pfd, 1, kTimeout), SyscallSucceedsWithValue(1));
}
ASSERT_THAT(shutdown(sockets->first_fd(), SHUT_RDWR), SyscallSucceeds());
}
}
TEST_P(PersistentListenerConnectStressTest, 65kTimesClose) {
// TODO(b/165912341): These are too slow on KVM platform with nested virt.
SKIP_IF(GvisorPlatform() == Platform::kKVM);
for (int i = 0; i < 1 << 16; ++i) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
}
}
INSTANTIATE_TEST_SUITE_P(
AllConnectedSockets, PersistentListenerConnectStressTest,
::testing::Values(
IPv6UDPBidirectionalBindSocketPair(0),
IPv4UDPBidirectionalBindSocketPair(0),
DualStackUDPBidirectionalBindSocketPair(0),
// Without REUSEADDR, we get port exhaustion on Linux.
SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &kSockOptOn)(
IPv6TCPAcceptBindPersistentListenerSocketPair(0)),
SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &kSockOptOn)(
IPv4TCPAcceptBindPersistentListenerSocketPair(0)),
SetSockOpt(SOL_SOCKET, SO_REUSEADDR, &kSockOptOn)(
DualStackTCPAcceptBindPersistentListenerSocketPair(0))));
} // namespace testing
} // namespace gvisor
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