if_gre.h revision 284066
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: stable/10/sys/net/if_gre.h 284066 2015-06-06 12:44:42Z ae $ 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 */ 39struct 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 50struct greip { 51 struct ip gi_ip; 52 struct grehdr gi_gre; 53} __packed; 54#endif 55 56#ifdef INET6 57struct greip6 { 58 struct ip6_hdr gi6_ip6; 59 struct grehdr gi6_gre; 60} __packed; 61#endif 62 63struct 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 uint32_t gre_mtu; 73 u_int gre_fibnum; 74 u_int gre_hlen; /* header size */ 75 union { 76 void *hdr; 77#ifdef INET 78 struct greip *gihdr; 79#endif 80#ifdef INET6 81 struct greip6 *gi6hdr; 82#endif 83 } gre_uhdr; 84 const struct encaptab *gre_ecookie; 85}; 86#define GRE2IFP(sc) ((sc)->gre_ifp) 87#define GRE_LOCK_INIT(sc) rm_init(&(sc)->gre_lock, "gre softc") 88#define GRE_LOCK_DESTROY(sc) rm_destroy(&(sc)->gre_lock) 89#define GRE_RLOCK_TRACKER struct rm_priotracker gre_tracker 90#define GRE_RLOCK(sc) rm_rlock(&(sc)->gre_lock, &gre_tracker) 91#define GRE_RUNLOCK(sc) rm_runlock(&(sc)->gre_lock, &gre_tracker) 92#define GRE_RLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_RLOCKED) 93#define GRE_WLOCK(sc) rm_wlock(&(sc)->gre_lock) 94#define GRE_WUNLOCK(sc) rm_wunlock(&(sc)->gre_lock) 95#define GRE_WLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_WLOCKED) 96 97#define gre_hdr gre_uhdr.hdr 98#define gre_gihdr gre_uhdr.gihdr 99#define gre_gi6hdr gre_uhdr.gi6hdr 100#define gre_oip gre_gihdr->gi_ip 101#define gre_oip6 gre_gi6hdr->gi6_ip6 102 103/* 104 * CISCO uses special type for GRE tunnel created as part of WCCP 105 * connection, while in fact those packets are just IPv4 encapsulated 106 * into GRE. 107 */ 108#define ETHERTYPE_WCCP 0x883E 109#endif /* _KERNEL */ 110 111#define GRESADDRS _IOW('i', 101, struct ifreq) 112#define GRESADDRD _IOW('i', 102, struct ifreq) 113#define GREGADDRS _IOWR('i', 103, struct ifreq) 114#define GREGADDRD _IOWR('i', 104, struct ifreq) 115#define GRESPROTO _IOW('i' , 105, struct ifreq) 116#define GREGPROTO _IOWR('i', 106, struct ifreq) 117 118#define GREGKEY _IOWR('i', 107, struct ifreq) 119#define GRESKEY _IOW('i', 108, struct ifreq) 120#define GREGOPTS _IOWR('i', 109, struct ifreq) 121#define GRESOPTS _IOW('i', 110, struct ifreq) 122 123#define GRE_ENABLE_CSUM 0x0001 124#define GRE_ENABLE_SEQ 0x0002 125#define GRE_OPTMASK (GRE_ENABLE_CSUM|GRE_ENABLE_SEQ) 126 127#endif /* _NET_IF_GRE_H_ */ 128