sys/netinet/udp.h

   1 /*      $NetBSD: udp.h,v 1.16 2012/06/22 14:54:35 christos 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  */
  42 struct 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 } __packed;
  48
  49 /* socket options for UDP */
  50 #define UDP_ENCAP       100
  51
  52 /* Encapsulation types */
  53 #define UDP_ENCAP_ESPINUDP_NON_IKE      1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
  54 #define UDP_ENCAP_ESPINUDP              2 /* draft-ietf-ipsec-udp-encaps-06 */
  55
  56 /* Default encapsulation port */
  57 #define UDP_ENCAP_ESPINUDP_PORT         500
  58
  59 /* Maximum UDP fragment size for ESP over UDP */
  60 #define UDP_ENCAP_ESPINUDP_MAXFRAGLEN   552
  61
  62 #endif /* !_NETINET_UDP_H_ */