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 * 3. 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 /* RFC3948 */ 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