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?? Editing: udp.h

/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 * Copyright (C) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef __NETINET_UDP_H
#define __NETINET_UDP_H    1

#include <sys/types.h>
#include <stdint.h>

/* UDP header as specified by RFC 768, August 1980. */

struct udphdr
{
  __extension__ union
  {
    struct
    {
      uint16_t uh_sport;	/* source port */
      uint16_t uh_dport;	/* destination port */
      uint16_t uh_ulen;		/* udp length */
      uint16_t uh_sum;		/* udp checksum */
    };
    struct
    {
      uint16_t source;
      uint16_t dest;
      uint16_t len;
      uint16_t check;
    };
  };
};

/* UDP socket options */
#define UDP_CORK	1	/* Never send partially complete segments.  */
#define UDP_ENCAP	100	/* Set the socket to accept
				   encapsulated packets.  */
#define UDP_NO_CHECK6_TX 101	/* Disable sending checksum for UDP
				   over IPv6.  */
#define UDP_NO_CHECK6_RX 102	/* Disable accepting checksum for UDP
				   over IPv6.  */

/* UDP encapsulation types */
#define UDP_ENCAP_ESPINUDP_NON_IKE 1	/* draft-ietf-ipsec-nat-t-ike-00/01 */
#define UDP_ENCAP_ESPINUDP	2	/* draft-ietf-ipsec-udp-encaps-06 */
#define UDP_ENCAP_L2TPINUDP	3	/* rfc2661 */
#define UDP_ENCAP_GTP0		4	/* GSM TS 09.60 */
#define UDP_ENCAP_GTP1U		5	/* 3GPP TS 29.060 */

#define SOL_UDP            17      /* sockopt level for UDP */

#endif /* netinet/udp.h */

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?? Editing: udp.h

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