1/*	$NetBSD: udp.h,v 1.19 2021/02/03 18:13:13 roy Exp $	*/
 2
 3/*
 4 * Copyright (c) 1982, 1986, 1993
 5 *	The Regents of the University of California.  All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)udp.h	8.1 (Berkeley) 6/10/93
32 */
33
34#ifndef _NETINET_UDP_H_
35#define _NETINET_UDP_H_
36
37#include <sys/types.h>
38/*
39 * Udp protocol header.
40 * Per RFC 768, September, 1981.
41 */
42struct udphdr {
43	uint16_t uh_sport;		/* source port */
44	uint16_t uh_dport;		/* destination port */
45	uint16_t uh_ulen;		/* udp length */
46	uint16_t uh_sum;		/* udp checksum */
47};
48#ifdef __CTASSERT
49__CTASSERT(sizeof(struct udphdr) == 8);
50#endif
51
52/* socket options for UDP */
53#define	UDP_ENCAP	100
54
55/* Encapsulation types */
56#define UDP_ENCAP_ESPINUDP_NON_IKE 	1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
57#define UDP_ENCAP_ESPINUDP		2 /* draft-ietf-ipsec-udp-encaps-06 */
58
59/* Default encapsulation port */
60#define UDP_ENCAP_ESPINUDP_PORT		500
61
62/* Maximum UDP fragment size for ESP over UDP */
63#define UDP_ENCAP_ESPINUDP_MAXFRAGLEN	552
64
65#endif /* !_NETINET_UDP_H_ */