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// Copyright 2018 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/un.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/syscalls/linux/unix_domain_socket_test_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
// Test fixture for tests that apply to pairs of connected stream unix sockets.
using StreamUnixSocketPairTest = SocketPairTest;
TEST_P(StreamUnixSocketPairTest, WriteOneSideClosed) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
constexpr char kStr[] = "abc";
ASSERT_THAT(write(sockets->second_fd(), kStr, 3),
SyscallFailsWithErrno(EPIPE));
}
TEST_P(StreamUnixSocketPairTest, ReadOneSideClosed) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
char data[10] = {};
ASSERT_THAT(read(sockets->second_fd(), data, sizeof(data)),
SyscallSucceedsWithValue(0));
}
TEST_P(StreamUnixSocketPairTest, RecvmsgOneSideClosed) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
// Set timeout so that it will not wait for ever.
struct timeval tv {
.tv_sec = 0, .tv_usec = 10
};
EXPECT_THAT(setsockopt(sockets->second_fd(), SOL_SOCKET, SO_RCVTIMEO, &tv,
sizeof(tv)),
SyscallSucceeds());
ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
char received_data[10] = {};
struct iovec iov;
iov.iov_base = received_data;
iov.iov_len = sizeof(received_data);
struct msghdr msg = {};
msg.msg_flags = -1;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
ASSERT_THAT(recvmsg(sockets->second_fd(), &msg, MSG_WAITALL),
SyscallSucceedsWithValue(0));
}
TEST_P(StreamUnixSocketPairTest, ReadOneSideClosedWithUnreadData) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
char buf[10] = {};
ASSERT_THAT(RetryEINTR(write)(sockets->second_fd(), buf, sizeof(buf)),
SyscallSucceedsWithValue(sizeof(buf)));
ASSERT_THAT(shutdown(sockets->first_fd(), SHUT_RDWR), SyscallSucceeds());
ASSERT_THAT(RetryEINTR(read)(sockets->second_fd(), buf, sizeof(buf)),
SyscallSucceedsWithValue(0));
ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
ASSERT_THAT(RetryEINTR(read)(sockets->second_fd(), buf, sizeof(buf)),
SyscallFailsWithErrno(ECONNRESET));
}
TEST_P(StreamUnixSocketPairTest, Sendto) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
struct sockaddr_un addr = {};
addr.sun_family = AF_UNIX;
constexpr char kPath[] = "\0nonexistent";
memcpy(addr.sun_path, kPath, sizeof(kPath));
constexpr char kStr[] = "abc";
ASSERT_THAT(sendto(sockets->second_fd(), kStr, 3, 0, (struct sockaddr*)&addr,
sizeof(addr)),
SyscallFailsWithErrno(EISCONN));
}
INSTANTIATE_TEST_SUITE_P(
AllUnixDomainSockets, StreamUnixSocketPairTest,
::testing::ValuesIn(IncludeReversals(VecCat<SocketPairKind>(
ApplyVec<SocketPairKind>(UnixDomainSocketPair,
AllBitwiseCombinations(List<int>{SOCK_STREAM},
List<int>{
0, SOCK_NONBLOCK})),
ApplyVec<SocketPairKind>(FilesystemBoundUnixDomainSocketPair,
AllBitwiseCombinations(List<int>{SOCK_STREAM},
List<int>{
0, SOCK_NONBLOCK})),
ApplyVec<SocketPairKind>(
AbstractBoundUnixDomainSocketPair,
AllBitwiseCombinations(List<int>{SOCK_STREAM},
List<int>{0, SOCK_NONBLOCK}))))));
} // namespace
} // namespace testing
} // namespace gvisor
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