if_gif.h revision 193664
1/* $FreeBSD: head/sys/net/if_gif.h 193664 2009-06-07 23:00:40Z hrs $ */ 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/* 34 * if_gif.h 35 */ 36 37#ifndef _NET_IF_GIF_H_ 38#define _NET_IF_GIF_H_ 39 40 41#ifdef _KERNEL 42#include "opt_inet.h" 43#include "opt_inet6.h" 44 45#include <netinet/in.h> 46/* xxx sigh, why route have struct route instead of pointer? */ 47 48struct encaptab; 49 50extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, 51 int af); 52extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, 53 int af); 54extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp); 55extern void (*ng_gif_attach_p)(struct ifnet *ifp); 56extern void (*ng_gif_detach_p)(struct ifnet *ifp); 57 58struct gif_softc { 59 struct ifnet *gif_ifp; 60 struct mtx gif_mtx; 61 struct sockaddr *gif_psrc; /* Physical src addr */ 62 struct sockaddr *gif_pdst; /* Physical dst addr */ 63 union { 64 struct route gifscr_ro; /* xxx */ 65#ifdef INET6 66 struct route_in6 gifscr_ro6; /* xxx */ 67#endif 68 } gifsc_gifscr; 69 int gif_flags; 70 u_int gif_fibnum; 71 const struct encaptab *encap_cookie4; 72 const struct encaptab *encap_cookie6; 73 void *gif_netgraph; /* ng_gif(4) netgraph node info */ 74 u_int gif_options; 75 LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */ 76}; 77#define GIF2IFP(sc) ((sc)->gif_ifp) 78#define GIF_LOCK_INIT(sc) mtx_init(&(sc)->gif_mtx, "gif softc", \ 79 NULL, MTX_DEF) 80#define GIF_LOCK_DESTROY(sc) mtx_destroy(&(sc)->gif_mtx) 81#define GIF_LOCK(sc) mtx_lock(&(sc)->gif_mtx) 82#define GIF_UNLOCK(sc) mtx_unlock(&(sc)->gif_mtx) 83#define GIF_LOCK_ASSERT(sc) mtx_assert(&(sc)->gif_mtx, MA_OWNED) 84 85#define gif_ro gifsc_gifscr.gifscr_ro 86#ifdef INET6 87#define gif_ro6 gifsc_gifscr.gifscr_ro6 88#endif 89 90#define GIF_MTU (1280) /* Default MTU */ 91#define GIF_MTU_MIN (1280) /* Minimum MTU */ 92#define GIF_MTU_MAX (8192) /* Maximum MTU */ 93 94#define MTAG_GIF 1080679712 95#define MTAG_GIF_CALLED 0 96 97struct etherip_header { 98#if BYTE_ORDER == LITTLE_ENDIAN 99 u_int eip_resvl:4, /* reserved */ 100 eip_ver:4; /* version */ 101#endif 102#if BYTE_ORDER == BIG_ENDIAN 103 u_int eip_ver:4, /* version */ 104 eip_resvl:4; /* reserved */ 105#endif 106 u_int8_t eip_resvh; /* reserved */ 107} __packed; 108 109#define ETHERIP_VERSION 0x3 110/* mbuf adjust factor to force 32-bit alignment of IP header */ 111#define ETHERIP_ALIGN 2 112 113/* Prototypes */ 114void gif_input(struct mbuf *, int, struct ifnet *); 115int gif_output(struct ifnet *, struct mbuf *, struct sockaddr *, 116 struct route *); 117int gif_ioctl(struct ifnet *, u_long, caddr_t); 118int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *); 119void gif_delete_tunnel(struct ifnet *); 120int gif_encapcheck(const struct mbuf *, int, int, void *); 121 122/* 123 * Virtualization support 124 */ 125 126struct vnet_gif { 127 LIST_HEAD(, gif_softc) _gif_softc_list; 128 int _max_gif_nesting; 129 int _parallel_tunnels; 130 int _ip_gif_ttl; 131 int _ip6_gif_hlim; 132}; 133 134#ifndef VIMAGE 135#ifndef VIMAGE_GLOBALS 136extern struct vnet_gif vnet_gif_0; 137#endif 138#endif 139 140#define INIT_VNET_GIF(vnet) \ 141 INIT_FROM_VNET(vnet, VNET_MOD_GIF, struct vnet_gif, vnet_gif) 142 143#define VNET_GIF(sym) VSYM(vnet_gif, sym) 144 145#define V_gif_softc_list VNET_GIF(gif_softc_list) 146#define V_max_gif_nesting VNET_GIF(max_gif_nesting) 147#define V_parallel_tunnels VNET_GIF(parallel_tunnels) 148#define V_ip_gif_ttl VNET_GIF(ip_gif_ttl) 149#define V_ip6_gif_hlim VNET_GIF(ip6_gif_hlim) 150 151#endif /* _KERNEL */ 152 153#define GIFGOPTS _IOR('i', 150, struct ifreq) 154#define GIFSOPTS _IOW('i', 151, struct ifreq) 155 156#define GIF_ACCEPT_REVETHIP 0x0001 157#define GIF_SEND_REVETHIP 0x0010 158#define GIF_FULLOPTS (GIF_ACCEPT_REVETHIP|GIF_SEND_REVETHIP) 159 160#endif /* _NET_IF_GIF_H_ */ 161