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1/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18/*
19 * Copyright (C) 1982, 1986 Regents of the University of California.
20 * All rights reserved.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 4. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 * SUCH DAMAGE.
45 */
46
47#ifndef __NETINET_UDP_H
48#define __NETINET_UDP_H 1
49
50#include <sys/types.h>
51#include <stdint.h>
52
53/* UDP header as specified by RFC 768, August 1980. */
54
55struct udphdr
56{
57 __extension__ union
58 {
59 struct
60 {
61 uint16_t uh_sport; /* source port */
62 uint16_t uh_dport; /* destination port */
63 uint16_t uh_ulen; /* udp length */
64 uint16_t uh_sum; /* udp checksum */
65 };
66 struct
67 {
68 uint16_t source;
69 uint16_t dest;
70 uint16_t len;
71 uint16_t check;
72 };
73 };
74};
75
76/* UDP socket options */
77#define UDP_CORK 1 /* Never send partially complete segments. */
78#define UDP_ENCAP 100 /* Set the socket to accept
79 encapsulated packets. */
80#define UDP_NO_CHECK6_TX 101 /* Disable sending checksum for UDP
81 over IPv6. */
82#define UDP_NO_CHECK6_RX 102 /* Disable accepting checksum for UDP
83 over IPv6. */
84#define UDP_SEGMENT 103 /* Set GSO segmentation size. */
85#define UDP_GRO 104 /* This socket can receive UDP GRO packets. */
86
87/* UDP encapsulation types */
88#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
89#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
90#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
91#define UDP_ENCAP_GTP0 4 /* GSM TS 09.60 */
92#define UDP_ENCAP_GTP1U 5 /* 3GPP TS 29.060 */
93
94#define SOL_UDP 17 /* sockopt level for UDP */
95
96#endif /* netinet/udp.h */