libc/test/src/sys/socket/linux/sockatmark_test.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Unittests for sockatmark.
///
//===----------------------------------------------------------------------===//

#include "hdr/sys_socket_macros.h" // For AF_UNIX and SOCK_STREAM
#include "src/__support/CPP/scope.h"
#include "src/sys/socket/send.h"
#include "src/sys/socket/sockatmark.h"
#include "src/sys/socket/socketpair.h"
#include "src/unistd/close.h"
#include "src/unistd/pipe.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/TestLogger.h"

using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
using LlvmLibcSockatmarkTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
using LIBC_NAMESPACE::cpp::scope_exit;

TEST_F(LlvmLibcSockatmarkTest, Socketpair) {
  int sockpair[2] = {-1, -1};
  ASSERT_THAT(LIBC_NAMESPACE::socketpair(AF_UNIX, SOCK_STREAM, 0, sockpair),
              Succeeds(0));
  scope_exit close_sockpair([&] {
    ASSERT_THAT(LIBC_NAMESPACE::close(sockpair[0]), Succeeds(0));
    ASSERT_THAT(LIBC_NAMESPACE::close(sockpair[1]), Succeeds(0));
  });

  if (LIBC_NAMESPACE::send(sockpair[0], ".", 1, MSG_OOB) != 1) {
    ASSERT_ERRNO_EQ(EOPNOTSUPP);
    LIBC_NAMESPACE::testing::tlog << "No kernel support for AF_UNIX OOB\n";
    ASSERT_THAT(LIBC_NAMESPACE::sockatmark(sockpair[0]), Fails(ENOTTY));
    return;
  }

  // sockpair[1] has OOB data because we've sent it above. sockpair[0] does not
  // because it's empty.
  ASSERT_THAT(LIBC_NAMESPACE::sockatmark(sockpair[0]), Succeeds(0));
  ASSERT_THAT(LIBC_NAMESPACE::sockatmark(sockpair[1]), Succeeds(1));
}

TEST_F(LlvmLibcSockatmarkTest, InvalidFdFails) {
  ASSERT_THAT(LIBC_NAMESPACE::sockatmark(-1), Fails(EBADF));
}

TEST_F(LlvmLibcSockatmarkTest, NonSocketFdFails) {
  int pipefd[2] = {-1, -1};
  ASSERT_THAT(LIBC_NAMESPACE::pipe(pipefd), Succeeds(0));
  scope_exit close_pipe([&] {
    ASSERT_THAT(LIBC_NAMESPACE::close(pipefd[0]), Succeeds(0));
    ASSERT_THAT(LIBC_NAMESPACE::close(pipefd[1]), Succeeds(0));
  });

  ASSERT_THAT(LIBC_NAMESPACE::sockatmark(pipefd[0]), Fails(ENOTTY));
}