sys/netinet/udp.h

   1 /*      $NetBSD: udp.h,v 1.12 2005/12/10 23:36:23 elad 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 /*
  38  * Udp protocol header.
  39  * Per RFC 768, September, 1981.
  40  */
  41 struct udphdr {
  42         u_int16_t uh_sport;             /* source port */
  43         u_int16_t uh_dport;             /* destination port */
  44         u_int16_t uh_ulen;              /* udp length */
  45         u_int16_t uh_sum;               /* udp checksum */
  46 } __packed;
  47
  48 /* socket options for UDP */
  49 #define UDP_ENCAP       100
  50
  51 /* Encapsulation types */
  52 #define UDP_ENCAP_ESPINUDP_NON_IKE      1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
  53 #define UDP_ENCAP_ESPINUDP              2 /* draft-ietf-ipsec-udp-encaps-06 */
  54
  55 /* Default encapsulation port */
  56 #define UDP_ENCAP_ESPINUDP_PORT         500
  57
  58 /* Maximum UDP fragment size for ESP over UDP */
  59 #define UDP_ENCAP_ESPINUDP_MAXFRAGLEN   552
  60
  61 #endif /* !_NETINET_UDP_H_ */