1 /*- 2 * Copyright (c) 1998 The NetBSD Foundation, Inc. 3 * Copyright (c) 2014 Andrey V. Elsukov <ae@FreeBSD.org> 4 * All rights reserved 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Heiko W.Rupp <hwr@pilhuhn.de> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $NetBSD: if_gre.h,v 1.13 2003/11/10 08:51:52 wiz Exp $ 31 * $FreeBSD$ 32 */ 33 34 #ifndef _NET_IF_GRE_H_ 35 #define _NET_IF_GRE_H_ 36 37 #ifdef _KERNEL 38 /* GRE header according to RFC 2784 and RFC 2890 */ 39 struct grehdr { 40 uint16_t gre_flags; /* GRE flags */ 41 #define GRE_FLAGS_CP 0x8000 /* checksum present */ 42 #define GRE_FLAGS_KP 0x2000 /* key present */ 43 #define GRE_FLAGS_SP 0x1000 /* sequence present */ 44 #define GRE_FLAGS_MASK (GRE_FLAGS_CP|GRE_FLAGS_KP|GRE_FLAGS_SP) 45 uint16_t gre_proto; /* protocol type */ 46 uint32_t gre_opts[0]; /* optional fields */ 47 } __packed; 48 49 #ifdef INET 50 struct greip { 51 struct ip gi_ip; 52 struct grehdr gi_gre; 53 } __packed; 54 #endif 55 56 #ifdef INET6 57 struct greip6 { 58 struct ip6_hdr gi6_ip6; 59 struct grehdr gi6_gre; 60 } __packed; 61 #endif 62 63 struct gre_softc { 64 struct ifnet *gre_ifp; 65 LIST_ENTRY(gre_softc) gre_list; 66 struct rmlock gre_lock; 67 int gre_family; /* AF of delivery header */ 68 uint32_t gre_iseq; 69 uint32_t gre_oseq; 70 uint32_t gre_key; 71 uint32_t gre_options; 72 u_int gre_fibnum; 73 u_int gre_hlen; /* header size */ 74 union { 75 void *hdr; 76 #ifdef INET 77 struct greip *gihdr; 78 #endif 79 #ifdef INET6 80 struct greip6 *gi6hdr; 81 #endif 82 } gre_uhdr; 83 const struct encaptab *gre_ecookie; 84 }; 85 #define GRE2IFP(sc) ((sc)->gre_ifp) 86 #define GRE_LOCK_INIT(sc) rm_init(&(sc)->gre_lock, "gre softc") 87 #define GRE_LOCK_DESTROY(sc) rm_destroy(&(sc)->gre_lock) 88 #define GRE_RLOCK_TRACKER struct rm_priotracker gre_tracker 89 #define GRE_RLOCK(sc) rm_rlock(&(sc)->gre_lock, &gre_tracker) 90 #define GRE_RUNLOCK(sc) rm_runlock(&(sc)->gre_lock, &gre_tracker) 91 #define GRE_RLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_RLOCKED) 92 #define GRE_WLOCK(sc) rm_wlock(&(sc)->gre_lock) 93 #define GRE_WUNLOCK(sc) rm_wunlock(&(sc)->gre_lock) 94 #define GRE_WLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_WLOCKED) 95 96 #define gre_hdr gre_uhdr.hdr 97 #define gre_gihdr gre_uhdr.gihdr 98 #define gre_gi6hdr gre_uhdr.gi6hdr 99 #define gre_oip gre_gihdr->gi_ip 100 #define gre_oip6 gre_gi6hdr->gi6_ip6 101 102 int gre_input(struct mbuf **, int *, int); 103 #ifdef INET 104 int in_gre_attach(struct gre_softc *); 105 int in_gre_output(struct mbuf *, int, int); 106 #endif 107 #ifdef INET6 108 int in6_gre_attach(struct gre_softc *); 109 int in6_gre_output(struct mbuf *, int, int); 110 #endif 111 /* 112 * CISCO uses special type for GRE tunnel created as part of WCCP 113 * connection, while in fact those packets are just IPv4 encapsulated 114 * into GRE. 115 */ 116 #define ETHERTYPE_WCCP 0x883E 117 #endif /* _KERNEL */ 118 119 #define GRESADDRS _IOW('i', 101, struct ifreq) 120 #define GRESADDRD _IOW('i', 102, struct ifreq) 121 #define GREGADDRS _IOWR('i', 103, struct ifreq) 122 #define GREGADDRD _IOWR('i', 104, struct ifreq) 123 #define GRESPROTO _IOW('i' , 105, struct ifreq) 124 #define GREGPROTO _IOWR('i', 106, struct ifreq) 125 126 #define GREGKEY _IOWR('i', 107, struct ifreq) 127 #define GRESKEY _IOW('i', 108, struct ifreq) 128 #define GREGOPTS _IOWR('i', 109, struct ifreq) 129 #define GRESOPTS _IOW('i', 110, struct ifreq) 130 131 #define GRE_ENABLE_CSUM 0x0001 132 #define GRE_ENABLE_SEQ 0x0002 133 #define GRE_OPTMASK (GRE_ENABLE_CSUM|GRE_ENABLE_SEQ) 134 135 #endif /* _NET_IF_GRE_H_ */ 136