The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/udp.h

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    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: releng/8.2/sys/netinet/udp.h 199583 2009-11-20 15:27:52Z jhb $
   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                       0x01
   52 
   53 
   54 /*
   55  * UDP Encapsulation of IPsec Packets options.
   56  */
   57 /* Encapsulation types. */
   58 #define UDP_ENCAP_ESPINUDP_NON_IKE      1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
   59 #define UDP_ENCAP_ESPINUDP              2 /* draft-ietf-ipsec-udp-encaps-02+ */
   60 
   61 /* Default ESP in UDP encapsulation port. */
   62 #define UDP_ENCAP_ESPINUDP_PORT         500
   63 
   64 /* Maximum UDP fragment size for ESP over UDP. */
   65 #define UDP_ENCAP_ESPINUDP_MAXFRAGLEN   552
   66 
   67 #endif

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