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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.
// Subset of socket tests that need Linux-specific headers (compared to POSIX
// headers).
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/capability_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
TEST(SocketTest, UnixConnectNeedsWritePerm) {
SKIP_IF(IsRunningWithVFS1());
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());
// Drop capabilites that allow us to override permision checks. Otherwise if
// the test is run as root, the connect below will bypass permission checks
// and succeed unexpectedly.
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
// 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));
ASSERT_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());
}
} // namespace testing
} // namespace gvisor
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