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

     /*      $OpenBSD: ip_gre.h,v 1.18 2022/08/27 20:28:01 mvs Exp $ */
     /*      $NetBSD: ip_gre.h,v 1.3 1998/10/07 23:33:02 thorpej Exp $ */
     
     /*
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Heiko W.Rupp <hwr@pilhuhn.de>
     *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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_IP_GRE_H_
    #define _NETINET_IP_GRE_H_
    
    /* Protocol number for Cisco's WCCP
     * The Internet Draft is:
     *   draft-forster-wrec-wccp-v1-00.txt
     */
    #define GREPROTO_WCCP   0x883e
    
    /*
     * Names for GRE sysctl objects
     */
    #define GRECTL_ALLOW    1               /* accept incoming GRE packets */
    #define GRECTL_WCCP     2               /* accept WCCPv1-style GRE packets */
    #define GRECTL_MAXID    3
    
    #define GRECTL_NAMES { \
            { 0, 0 }, \
            { "allow", CTLTYPE_INT }, \
            { "wccp", CTLTYPE_INT }, \
    }
    
    #ifdef _KERNEL
    
    extern const struct pr_usrreqs gre_usrreqs;
    
    int     gre_usrreq(struct socket *, int, struct mbuf *, struct mbuf *,
                struct mbuf *, struct proc *);
    int     gre_send(struct socket *, struct mbuf *, struct mbuf *,
                struct mbuf *);
    #endif /* _KERNEL */
    #endif /* _NETINET_IP_GRE_H_ */

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