1 /* $FreeBSD$ */ 2 /* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the project nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _NET_IF_GIF_H_ 36 #define _NET_IF_GIF_H_ 37 38 #ifdef _KERNEL 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 42 #include <netinet/in.h> 43 44 struct ip; 45 struct ip6_hdr; 46 struct encaptab; 47 48 extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, 49 int af); 50 extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, 51 int af); 52 extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp); 53 extern void (*ng_gif_attach_p)(struct ifnet *ifp); 54 extern void (*ng_gif_detach_p)(struct ifnet *ifp); 55 56 struct gif_softc { 57 struct ifnet *gif_ifp; 58 struct rmlock gif_lock; 59 const struct encaptab *gif_ecookie; 60 int gif_family; 61 int gif_flags; 62 u_int gif_fibnum; 63 u_int gif_options; 64 void *gif_netgraph; /* netgraph node info */ 65 union { 66 void *hdr; 67 struct ip *iphdr; 68 #ifdef INET6 69 struct ip6_hdr *ip6hdr; 70 #endif 71 } gif_uhdr; 72 LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */ 73 }; 74 #define GIF2IFP(sc) ((sc)->gif_ifp) 75 #define GIF_LOCK_INIT(sc) rm_init(&(sc)->gif_lock, "gif softc") 76 #define GIF_LOCK_DESTROY(sc) rm_destroy(&(sc)->gif_lock) 77 #define GIF_RLOCK_TRACKER struct rm_priotracker gif_tracker 78 #define GIF_RLOCK(sc) rm_rlock(&(sc)->gif_lock, &gif_tracker) 79 #define GIF_RUNLOCK(sc) rm_runlock(&(sc)->gif_lock, &gif_tracker) 80 #define GIF_RLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_RLOCKED) 81 #define GIF_WLOCK(sc) rm_wlock(&(sc)->gif_lock) 82 #define GIF_WUNLOCK(sc) rm_wunlock(&(sc)->gif_lock) 83 #define GIF_WLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_WLOCKED) 84 85 #define gif_iphdr gif_uhdr.iphdr 86 #define gif_hdr gif_uhdr.hdr 87 #ifdef INET6 88 #define gif_ip6hdr gif_uhdr.ip6hdr 89 #endif 90 91 #define GIF_MTU (1280) /* Default MTU */ 92 #define GIF_MTU_MIN (1280) /* Minimum MTU */ 93 #define GIF_MTU_MAX (8192) /* Maximum MTU */ 94 95 struct etherip_header { 96 #if BYTE_ORDER == LITTLE_ENDIAN 97 u_int eip_resvl:4, /* reserved */ 98 eip_ver:4; /* version */ 99 #endif 100 #if BYTE_ORDER == BIG_ENDIAN 101 u_int eip_ver:4, /* version */ 102 eip_resvl:4; /* reserved */ 103 #endif 104 u_int8_t eip_resvh; /* reserved */ 105 } __packed; 106 107 #define ETHERIP_VERSION 0x3 108 /* mbuf adjust factor to force 32-bit alignment of IP header */ 109 #define ETHERIP_ALIGN 2 110 111 /* Prototypes */ 112 void gif_input(struct mbuf *, struct ifnet *, int, uint8_t); 113 int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 114 struct route *); 115 int gif_encapcheck(const struct mbuf *, int, int, void *); 116 #ifdef INET 117 int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 118 int in_gif_encapcheck(const struct mbuf *, int, int, void *); 119 int in_gif_attach(struct gif_softc *); 120 #endif 121 #ifdef INET6 122 int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 123 int in6_gif_encapcheck(const struct mbuf *, int, int, void *); 124 int in6_gif_attach(struct gif_softc *); 125 #endif 126 #endif /* _KERNEL */ 127 128 #define GIFGOPTS _IOWR('i', 150, struct ifreq) 129 #define GIFSOPTS _IOW('i', 151, struct ifreq) 130 131 #define GIF_IGNORE_SOURCE 0x0002 132 #define GIF_OPTMASK (GIF_IGNORE_SOURCE) 133 134 #endif /* _NET_IF_GIF_H_ */ 135