xref: /illumos-gate/usr/src/boot/include/netinet/udp.h (revision 55fea89d)
1 /*-
2  * Copyright (c) 1982, 1986, 1993
3  *	The Regents of the University of California.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 4. Neither the name of the University nor the names of its contributors
15  *    may be used to endorse or promote products derived from this software
16  *    without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  *	@(#)udp.h	8.1 (Berkeley) 6/10/93
31  * $FreeBSD$
32  */
33 
34 #ifndef _NETINET_UDP_H_
35 #define	_NETINET_UDP_H_
36 
37 /*
38  * UDP protocol header.
39  * Per RFC 768, September, 1981.
40  */
41 struct udphdr {
42 	u_short	uh_sport;		/* source port */
43 	u_short	uh_dport;		/* destination port */
44 	u_short	uh_ulen;		/* udp length */
45 	u_short	uh_sum;			/* udp checksum */
46 };
47 
48 /*
49  * User-settable options (used with setsockopt).
50  */
51 #define	UDP_ENCAP			1
52 
53 /* Start of reserved space for third-party user-settable options. */
54 #define	UDP_VENDOR			SO_VENDOR
55 
56 /*
57  * UDP Encapsulation of IPsec Packets options.
58  */
59 /* Encapsulation types. */
60 #define	UDP_ENCAP_ESPINUDP_NON_IKE	1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
61 #define	UDP_ENCAP_ESPINUDP		2 /* draft-ietf-ipsec-udp-encaps-02+ */
62 
63 /* Default ESP in UDP encapsulation port. */
64 #define	UDP_ENCAP_ESPINUDP_PORT		500
65 
66 /* Maximum UDP fragment size for ESP over UDP. */
67 #define	UDP_ENCAP_ESPINUDP_MAXFRAGLEN	552
68 
69 #endif
70