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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 <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/temp_umask.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
TEST(SocketTest, UnixSocketPairProtocol) {
int socks[2];
ASSERT_THAT(socketpair(AF_UNIX, SOCK_STREAM, PF_UNIX, socks),
SyscallSucceeds());
close(socks[0]);
close(socks[1]);
}
TEST(SocketTest, ProtocolUnix) {
struct {
int domain, type, protocol;
} tests[] = {
{AF_UNIX, SOCK_STREAM, PF_UNIX},
{AF_UNIX, SOCK_SEQPACKET, PF_UNIX},
{AF_UNIX, SOCK_DGRAM, PF_UNIX},
};
for (int i = 0; i < ABSL_ARRAYSIZE(tests); i++) {
ASSERT_NO_ERRNO_AND_VALUE(
Socket(tests[i].domain, tests[i].type, tests[i].protocol));
}
}
TEST(SocketTest, ProtocolInet) {
struct {
int domain, type, protocol;
} tests[] = {
{AF_INET, SOCK_DGRAM, IPPROTO_UDP},
{AF_INET, SOCK_STREAM, IPPROTO_TCP},
};
for (int i = 0; i < ABSL_ARRAYSIZE(tests); i++) {
ASSERT_NO_ERRNO_AND_VALUE(
Socket(tests[i].domain, tests[i].type, tests[i].protocol));
}
}
TEST(SocketTest, UnixSocketStat) {
// TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It
// should pass in VFS2.
SKIP_IF(IsRunningOnGvisor());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
// The permissions of the file created with bind(2) should be defined by the
// permissions of the bound socket and the umask.
mode_t sock_perm = 0765, mask = 0123;
ASSERT_THAT(fchmod(bound.get(), sock_perm), SyscallSucceeds());
TempUmask m(mask);
struct sockaddr_un addr =
ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(/*abstract=*/false, AF_UNIX));
ASSERT_THAT(bind(bound.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
struct stat statbuf = {};
ASSERT_THAT(stat(addr.sun_path, &statbuf), SyscallSucceeds());
// Mode should be S_IFSOCK.
EXPECT_EQ(statbuf.st_mode, S_IFSOCK | sock_perm & ~mask);
// Timestamps should be equal and non-zero.
EXPECT_NE(statbuf.st_atime, 0);
EXPECT_EQ(statbuf.st_atime, statbuf.st_mtime);
EXPECT_EQ(statbuf.st_atime, statbuf.st_ctime);
}
TEST(SocketTest, UnixConnectNeedsWritePerm) {
// TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It
// should succeed in VFS2.
SKIP_IF(IsRunningOnGvisor());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
struct sockaddr_un addr =
ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(/*abstract=*/false, AF_UNIX));
ASSERT_THAT(bind(bound.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
ASSERT_THAT(listen(bound.get(), 1), SyscallSucceeds());
// Connect should fail without write perms.
ASSERT_THAT(chmod(addr.sun_path, 0500), SyscallSucceeds());
FileDescriptor client =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
EXPECT_THAT(connect(client.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallFailsWithErrno(EACCES));
// Connect should succeed with write perms.
ASSERT_THAT(chmod(addr.sun_path, 0200), SyscallSucceeds());
EXPECT_THAT(connect(client.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
}
using SocketOpenTest = ::testing::TestWithParam<int>;
// UDS cannot be opened.
TEST_P(SocketOpenTest, Unix) {
// FIXME(b/142001530): Open incorrectly succeeds on gVisor.
//
// TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It
// should succeed in VFS2.
SKIP_IF(IsRunningOnGvisor());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
struct sockaddr_un addr =
ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(/*abstract=*/false, AF_UNIX));
ASSERT_THAT(bind(bound.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
EXPECT_THAT(open(addr.sun_path, GetParam()), SyscallFailsWithErrno(ENXIO));
}
INSTANTIATE_TEST_SUITE_P(OpenModes, SocketOpenTest,
::testing::Values(O_RDONLY, O_RDWR));
} // namespace testing
} // namespace gvisor
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