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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 <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/unix_domain_socket_test_util.h"
#include "test/util/socket_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
TEST_P(AllSocketPairTest, Bind) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
}
TEST_P(AllSocketPairTest, BindTooLong) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
// first_addr is a sockaddr_storage being used as a sockaddr_un. Use the full
// length which is longer than expected for a Unix socket.
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sizeof(sockaddr_storage)),
SyscallFailsWithErrno(EINVAL));
}
TEST_P(AllSocketPairTest, DoubleBindSocket) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
EXPECT_THAT(
bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
// Linux 4.09 returns EINVAL here, but some time before 4.19 it switched
// to EADDRINUSE.
AnyOf(SyscallFailsWithErrno(EADDRINUSE), SyscallFailsWithErrno(EINVAL)));
}
TEST_P(AllSocketPairTest, GetLocalAddr) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
socklen_t addressLength = sockets->first_addr_size();
struct sockaddr_storage address = {};
ASSERT_THAT(getsockname(sockets->first_fd(), (struct sockaddr*)(&address),
&addressLength),
SyscallSucceeds());
EXPECT_EQ(
0, memcmp(&address, sockets->first_addr(), sockets->first_addr_size()));
}
TEST_P(AllSocketPairTest, GetLocalAddrWithoutBind) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
socklen_t addressLength = sockets->first_addr_size();
struct sockaddr_storage received_address = {};
ASSERT_THAT(
getsockname(sockets->first_fd(), (struct sockaddr*)(&received_address),
&addressLength),
SyscallSucceeds());
struct sockaddr_storage want_address = {};
want_address.ss_family = sockets->first_addr()->sa_family;
EXPECT_EQ(0, memcmp(&received_address, &want_address, addressLength));
}
TEST_P(AllSocketPairTest, GetRemoteAddressWithoutConnect) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
socklen_t addressLength = sockets->first_addr_size();
struct sockaddr_storage address = {};
ASSERT_THAT(getpeername(sockets->second_fd(), (struct sockaddr*)(&address),
&addressLength),
SyscallFailsWithErrno(ENOTCONN));
}
TEST_P(AllSocketPairTest, DoubleBindAddress) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
EXPECT_THAT(bind(sockets->second_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallFailsWithErrno(EADDRINUSE));
}
TEST_P(AllSocketPairTest, Unbind) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
// Filesystem Unix sockets do not release their address when closed.
if (sockets->first_addr()->sa_data[0] != 0) {
ASSERT_THAT(bind(sockets->second_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallFailsWithErrno(EADDRINUSE));
return;
}
ASSERT_THAT(bind(sockets->second_fd(), sockets->first_addr(),
sockets->first_addr_size()),
SyscallSucceeds());
ASSERT_THAT(close(sockets->release_second_fd()), SyscallSucceeds());
}
INSTANTIATE_TEST_SUITE_P(
AllUnixDomainSockets, AllSocketPairTest,
::testing::ValuesIn(VecCat<SocketPairKind>(
ApplyVec<SocketPairKind>(
FilesystemUnboundUnixDomainSocketPair,
AllBitwiseCombinations(List<int>{SOCK_STREAM, SOCK_DGRAM,
SOCK_SEQPACKET},
List<int>{0, SOCK_NONBLOCK})),
ApplyVec<SocketPairKind>(
AbstractUnboundUnixDomainSocketPair,
AllBitwiseCombinations(List<int>{SOCK_STREAM, SOCK_DGRAM,
SOCK_SEQPACKET},
List<int>{0, SOCK_NONBLOCK})))));
} // namespace
} // namespace testing
} // namespace gvisor
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