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