1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <sys/types.h>
20
21#include <folly/net/NetworkSocket.h>
22#include <folly/portability/Sockets.h>
23
24#if !defined(FOLLY_ALLOW_TFO)
25#if defined(__linux__) || defined(__APPLE__)
26// only allow for linux right now
27#define FOLLY_ALLOW_TFO 1
28#endif
29#endif
30
31namespace folly {
32namespace detail {
33/**
34 * tfo_sendto has the same semantics as sendmsg, but is used to
35 * send with TFO data.
36 */
37ssize_t tfo_sendmsg(NetworkSocket sockfd, const struct msghdr* msg, int flags);
38
39/**
40 * Enable TFO on a listening socket.
41 */
42int tfo_enable(NetworkSocket sockfd, size_t max_queue_size);
43
44/**
45 * Check if TFO succeeded in being used.
46 */
47bool tfo_succeeded(NetworkSocket sockfd);
48} // namespace detail
49} // namespace folly
50