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e82d7b2952
The code added inc89c8a1029in order to compensate possible misalignment caused by prepending the IP4/6 header with an EtherIP one got broken at some point by a rewrite of gif(4). For better or worse,8018ac153frelaxed the alignment of struct ip from 32 bit to 16 bit, though. As a result, a 16 bit offset of the IPv4 header induced by the addition of the 16 bit EtherIP one no longer is a problem in the first place. The alignment of struct ip6_hdr currently is even only 8 bit, making it even less problematic with regards to possible misalignment. Thus, remove the code for handling misalignment in in{,6}_gif_output() altogether again. While at it, replace the 3 bcopy(9) calls in gif(4) with memcpy(9) as there's no need to handle overlap here.
128 lines
4.1 KiB
C
128 lines
4.1 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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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
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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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struct ip;
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struct ip6_hdr;
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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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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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struct ip6_hdr *ip6hdr;
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} gif_uhdr;
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CK_LIST_ENTRY(gif_softc) chain;
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CK_LIST_ENTRY(gif_softc) srchash;
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};
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CK_LIST_HEAD(gif_list, gif_softc);
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MALLOC_DECLARE(M_GIF);
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#ifndef GIF_HASH_SIZE
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#define GIF_HASH_SIZE (1 << 4)
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#endif
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#define GIF2IFP(sc) ((sc)->gif_ifp)
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#define gif_iphdr gif_uhdr.iphdr
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#define gif_hdr gif_uhdr.hdr
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#define gif_ip6hdr gif_uhdr.ip6hdr
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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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#define GIF_WAIT() epoch_wait_preempt(net_epoch_preempt)
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/* Prototypes */
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struct gif_list *gif_hashinit(void);
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void gif_hashdestroy(struct gif_list *);
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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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void in_gif_init(void);
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void in_gif_uninit(void);
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int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in_gif_ioctl(struct gif_softc *, u_long, caddr_t);
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int in_gif_setopts(struct gif_softc *, u_int);
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void in6_gif_init(void);
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void in6_gif_uninit(void);
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int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t);
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int in6_gif_setopts(struct gif_softc *, u_int);
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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_IGNORE_SOURCE 0x0002
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#define GIF_OPTMASK (GIF_IGNORE_SOURCE)
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#endif /* _NET_IF_GIF_H_ */
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