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/ip_options.h

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    1 /*
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1986, 1993
    5  *      The Regents of the University of California.
    6  * Copyright (c) 2005 Andre Oppermann, Internet Business Solutions AG.
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  * $FreeBSD$
   34  */
   35 
   36 #ifndef _NETINET_IP_OPTIONS_H_
   37 #define _NETINET_IP_OPTIONS_H_
   38 
   39 struct ipoptrt {
   40         struct  in_addr dst;                    /* final destination */
   41         char    nop;                            /* one NOP to align */
   42         char    srcopt[IPOPT_OFFSET + 1];       /* OPTVAL, OLEN and OFFSET */
   43         struct  in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
   44 };
   45 
   46 struct ipopt_tag {
   47         struct  m_tag tag;                      /* m_tag */
   48         int     ip_nhops;
   49         struct  ipoptrt ip_srcrt;
   50 };
   51 
   52 VNET_DECLARE(int, ip_doopts);           /* process or ignore IP options */
   53 #define V_ip_doopts     VNET(ip_doopts)
   54 
   55 int              ip_checkrouteralert(struct mbuf *);
   56 int              ip_dooptions(struct mbuf *, int);
   57 struct mbuf     *ip_insertoptions(struct mbuf *, struct mbuf *, int *);
   58 int              ip_optcopy(struct ip *, struct ip *);
   59 int              ip_pcbopts(struct inpcb *, int, struct mbuf *);
   60 void             ip_stripoptions(struct mbuf *);
   61 struct mbuf     *ip_srcroute(struct mbuf *);
   62 
   63 #endif /* !_NETINET_IP_OPTIONS_H_ */

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