cbc4e577f0
gif(4) interface. Add new option "ignore_source" for gif(4) interface. When it is enabled, gif's encapcheck function requires match only for packet's destination address. Differential Revision: https://reviews.freebsd.org/D2004 Obtained from: Yandex LLC MFC after: 2 weeks Sponsored by: Yandex LLC
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* $FreeBSD$ */
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/* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */
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/*-
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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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* 3. Neither the name of the project 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 PROJECT 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 PROJECT 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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#ifndef _NET_IF_GIF_H_
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#define _NET_IF_GIF_H_
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#ifdef _KERNEL
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <netinet/in.h>
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struct ip;
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struct ip6_hdr;
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struct encaptab;
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extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
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int af);
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extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
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int af);
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extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
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extern void (*ng_gif_attach_p)(struct ifnet *ifp);
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extern void (*ng_gif_detach_p)(struct ifnet *ifp);
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struct gif_softc {
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struct ifnet *gif_ifp;
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struct rmlock gif_lock;
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const struct encaptab *gif_ecookie;
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int gif_family;
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int gif_flags;
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u_int gif_fibnum;
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u_int gif_options;
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void *gif_netgraph; /* netgraph node info */
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union {
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void *hdr;
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struct ip *iphdr;
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#ifdef INET6
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struct ip6_hdr *ip6hdr;
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#endif
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} gif_uhdr;
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LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */
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};
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#define GIF2IFP(sc) ((sc)->gif_ifp)
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#define GIF_LOCK_INIT(sc) rm_init(&(sc)->gif_lock, "gif softc")
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#define GIF_LOCK_DESTROY(sc) rm_destroy(&(sc)->gif_lock)
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#define GIF_RLOCK_TRACKER struct rm_priotracker gif_tracker
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#define GIF_RLOCK(sc) rm_rlock(&(sc)->gif_lock, &gif_tracker)
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#define GIF_RUNLOCK(sc) rm_runlock(&(sc)->gif_lock, &gif_tracker)
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#define GIF_RLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_RLOCKED)
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#define GIF_WLOCK(sc) rm_wlock(&(sc)->gif_lock)
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#define GIF_WUNLOCK(sc) rm_wunlock(&(sc)->gif_lock)
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#define GIF_WLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_WLOCKED)
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#define gif_iphdr gif_uhdr.iphdr
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#define gif_hdr gif_uhdr.hdr
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#ifdef INET6
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#define gif_ip6hdr gif_uhdr.ip6hdr
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#endif
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#define GIF_MTU (1280) /* Default MTU */
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#define GIF_MTU_MIN (1280) /* Minimum MTU */
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#define GIF_MTU_MAX (8192) /* Maximum MTU */
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struct etherip_header {
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#if BYTE_ORDER == LITTLE_ENDIAN
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u_int eip_resvl:4, /* reserved */
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eip_ver:4; /* version */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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u_int eip_ver:4, /* version */
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eip_resvl:4; /* reserved */
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#endif
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u_int8_t eip_resvh; /* reserved */
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} __packed;
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#define ETHERIP_VERSION 0x3
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/* mbuf adjust factor to force 32-bit alignment of IP header */
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#define ETHERIP_ALIGN 2
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/* Prototypes */
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void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
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int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
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struct route *);
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int gif_encapcheck(const struct mbuf *, int, int, void *);
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#ifdef INET
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int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in_gif_encapcheck(const struct mbuf *, int, int, void *);
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int in_gif_attach(struct gif_softc *);
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#endif
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#ifdef INET6
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int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in6_gif_encapcheck(const struct mbuf *, int, int, void *);
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int in6_gif_attach(struct gif_softc *);
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#endif
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#endif /* _KERNEL */
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#define GIFGOPTS _IOWR('i', 150, struct ifreq)
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#define GIFSOPTS _IOW('i', 151, struct ifreq)
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#define GIF_ACCEPT_REVETHIP 0x0001
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#define GIF_IGNORE_SOURCE 0x0002
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#define GIF_SEND_REVETHIP 0x0010
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#define GIF_OPTMASK (GIF_ACCEPT_REVETHIP|GIF_SEND_REVETHIP| \
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GIF_IGNORE_SOURCE)
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#endif /* _NET_IF_GIF_H_ */
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