f0dcb78326
by IGMPv3 to check for the IPv4 Router Alert [RFC2113] option in a pulled-up IP mbuf chain.
61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California.
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* Copyright (c) 2005 Andre Oppermann, Internet Business Solutions AG.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET_IP_OPTIONS_H_
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#define _NETINET_IP_OPTIONS_H_
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struct ipoptrt {
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struct in_addr dst; /* final destination */
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char nop; /* one NOP to align */
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char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
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struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
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};
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struct ipopt_tag {
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struct m_tag tag; /* m_tag */
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int ip_nhops;
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struct ipoptrt ip_srcrt;
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};
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extern int ip_doopts; /* process or ignore IP options */
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int ip_checkrouteralert(struct mbuf *);
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int ip_dooptions(struct mbuf *, int);
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struct mbuf *ip_insertoptions(struct mbuf *, struct mbuf *, int *);
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int ip_optcopy(struct ip *, struct ip *);
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int ip_pcbopts(struct inpcb *, int, struct mbuf *);
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void ip_stripoptions(struct mbuf *, struct mbuf *);
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struct mbuf *ip_srcroute(struct mbuf *);
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#endif /* !_NETINET_IP_OPTIONS_H_ */
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