dbe5926046
version field sent via gif(4)+if_bridge(4). The EtherIP
implementation found on FreeBSD 6.1, 6.2, 6.3, 7.0, 7.1, and 7.2 had
an interoperability issue because it sent the incorrect EtherIP
packets and discarded the correct ones.
This change introduces the following two flags to gif(4):
accept_rev_ethip_ver: accepts both correct EtherIP packets and ones
with reversed version field, if enabled. If disabled, the gif
accepts the correct packets only. This flag is enabled by
default.
send_rev_ethip_ver: sends EtherIP packets with reversed version field
intentionally, if enabled. If disabled, the gif sends the correct
packets only. This flag is disabled by default.
These flags are stored in struct gif_softc and can be set by
ifconfig(8) on per-interface basis.
Note that this is an incompatible change of EtherIP with the older
FreeBSD releases. If you need to interoperate older FreeBSD boxes and
new versions after this commit, setting "send_rev_ethip_ver" is
needed.
Reviewed by: thompsa and rwatson
Spotted by: Shunsuke SHINOMIYA
PR: kern/125003
MFC after: 2 weeks
161 lines
5.0 KiB
C
161 lines
5.0 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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/*
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* if_gif.h
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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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/* xxx sigh, why route have struct route instead of pointer? */
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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 mtx gif_mtx;
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struct sockaddr *gif_psrc; /* Physical src addr */
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struct sockaddr *gif_pdst; /* Physical dst addr */
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union {
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struct route gifscr_ro; /* xxx */
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#ifdef INET6
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struct route_in6 gifscr_ro6; /* xxx */
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#endif
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} gifsc_gifscr;
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int gif_flags;
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u_int gif_fibnum;
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const struct encaptab *encap_cookie4;
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const struct encaptab *encap_cookie6;
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void *gif_netgraph; /* ng_gif(4) netgraph node info */
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u_int gif_options;
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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) mtx_init(&(sc)->gif_mtx, "gif softc", \
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NULL, MTX_DEF)
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#define GIF_LOCK_DESTROY(sc) mtx_destroy(&(sc)->gif_mtx)
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#define GIF_LOCK(sc) mtx_lock(&(sc)->gif_mtx)
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#define GIF_UNLOCK(sc) mtx_unlock(&(sc)->gif_mtx)
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#define GIF_LOCK_ASSERT(sc) mtx_assert(&(sc)->gif_mtx, MA_OWNED)
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#define gif_ro gifsc_gifscr.gifscr_ro
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#ifdef INET6
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#define gif_ro6 gifsc_gifscr.gifscr_ro6
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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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#define MTAG_GIF 1080679712
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#define MTAG_GIF_CALLED 0
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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 *, int, struct ifnet *);
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int gif_output(struct ifnet *, struct mbuf *, struct sockaddr *,
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struct route *);
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int gif_ioctl(struct ifnet *, u_long, caddr_t);
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int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *);
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void gif_delete_tunnel(struct ifnet *);
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int gif_encapcheck(const struct mbuf *, int, int, void *);
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/*
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* Virtualization support
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*/
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struct vnet_gif {
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LIST_HEAD(, gif_softc) _gif_softc_list;
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int _max_gif_nesting;
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int _parallel_tunnels;
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int _ip_gif_ttl;
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int _ip6_gif_hlim;
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};
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#ifndef VIMAGE
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#ifndef VIMAGE_GLOBALS
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extern struct vnet_gif vnet_gif_0;
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#endif
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#endif
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#define INIT_VNET_GIF(vnet) \
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INIT_FROM_VNET(vnet, VNET_MOD_GIF, struct vnet_gif, vnet_gif)
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#define VNET_GIF(sym) VSYM(vnet_gif, sym)
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#define V_gif_softc_list VNET_GIF(gif_softc_list)
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#define V_max_gif_nesting VNET_GIF(max_gif_nesting)
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#define V_parallel_tunnels VNET_GIF(parallel_tunnels)
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#define V_ip_gif_ttl VNET_GIF(ip_gif_ttl)
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#define V_ip6_gif_hlim VNET_GIF(ip6_gif_hlim)
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#endif /* _KERNEL */
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#define GIFGOPTS _IOR('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_SEND_REVETHIP 0x0010
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#define GIF_FULLOPTS (GIF_ACCEPT_REVETHIP|GIF_SEND_REVETHIP)
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#endif /* _NET_IF_GIF_H_ */
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