1 /* $FreeBSD$ */ 2 /* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */ 3 4 /*- 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _NET_IF_GIF_H_ 34 #define _NET_IF_GIF_H_ 35 36 #ifdef _KERNEL 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 40 #include <netinet/in.h> 41 42 struct ip; 43 struct ip6_hdr; 44 struct encaptab; 45 46 extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, 47 int af); 48 extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, 49 int af); 50 extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp); 51 extern void (*ng_gif_attach_p)(struct ifnet *ifp); 52 extern void (*ng_gif_detach_p)(struct ifnet *ifp); 53 54 struct gif_softc { 55 struct ifnet *gif_ifp; 56 struct rmlock gif_lock; 57 const struct encaptab *gif_ecookie; 58 int gif_family; 59 int gif_flags; 60 u_int gif_fibnum; 61 u_int gif_options; 62 void *gif_netgraph; /* netgraph node info */ 63 union { 64 void *hdr; 65 struct ip *iphdr; 66 #ifdef INET6 67 struct ip6_hdr *ip6hdr; 68 #endif 69 } gif_uhdr; 70 LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */ 71 }; 72 #define GIF2IFP(sc) ((sc)->gif_ifp) 73 #define GIF_LOCK_INIT(sc) rm_init(&(sc)->gif_lock, "gif softc") 74 #define GIF_LOCK_DESTROY(sc) rm_destroy(&(sc)->gif_lock) 75 #define GIF_RLOCK_TRACKER struct rm_priotracker gif_tracker 76 #define GIF_RLOCK(sc) rm_rlock(&(sc)->gif_lock, &gif_tracker) 77 #define GIF_RUNLOCK(sc) rm_runlock(&(sc)->gif_lock, &gif_tracker) 78 #define GIF_RLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_RLOCKED) 79 #define GIF_WLOCK(sc) rm_wlock(&(sc)->gif_lock) 80 #define GIF_WUNLOCK(sc) rm_wunlock(&(sc)->gif_lock) 81 #define GIF_WLOCK_ASSERT(sc) rm_assert(&(sc)->gif_lock, RA_WLOCKED) 82 83 #define gif_iphdr gif_uhdr.iphdr 84 #define gif_hdr gif_uhdr.hdr 85 #ifdef INET6 86 #define gif_ip6hdr gif_uhdr.ip6hdr 87 #endif 88 89 #define GIF_MTU (1280) /* Default MTU */ 90 #define GIF_MTU_MIN (1280) /* Minimum MTU */ 91 #define GIF_MTU_MAX (8192) /* Maximum MTU */ 92 93 struct etherip_header { 94 #if BYTE_ORDER == LITTLE_ENDIAN 95 u_int eip_resvl:4, /* reserved */ 96 eip_ver:4; /* version */ 97 #endif 98 #if BYTE_ORDER == BIG_ENDIAN 99 u_int eip_ver:4, /* version */ 100 eip_resvl:4; /* reserved */ 101 #endif 102 u_int8_t eip_resvh; /* reserved */ 103 } __packed; 104 105 #define ETHERIP_VERSION 0x3 106 /* mbuf adjust factor to force 32-bit alignment of IP header */ 107 #define ETHERIP_ALIGN 2 108 109 /* Prototypes */ 110 void gif_input(struct mbuf *, struct ifnet *, int, uint8_t); 111 int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 112 struct route *); 113 int gif_encapcheck(const struct mbuf *, int, int, void *); 114 #ifdef INET 115 int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 116 int in_gif_encapcheck(const struct mbuf *, int, int, void *); 117 int in_gif_attach(struct gif_softc *); 118 #endif 119 #ifdef INET6 120 int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 121 int in6_gif_encapcheck(const struct mbuf *, int, int, void *); 122 int in6_gif_attach(struct gif_softc *); 123 #endif 124 #endif /* _KERNEL */ 125 126 #define GIFGOPTS _IOWR('i', 150, struct ifreq) 127 #define GIFSOPTS _IOW('i', 151, struct ifreq) 128 129 #define GIF_ACCEPT_REVETHIP 0x0001 130 #define GIF_IGNORE_SOURCE 0x0002 131 #define GIF_SEND_REVETHIP 0x0010 132 #define GIF_OPTMASK (GIF_ACCEPT_REVETHIP|GIF_SEND_REVETHIP| \ 133 GIF_IGNORE_SOURCE) 134 135 #endif /* _NET_IF_GIF_H_ */ 136