2 * Copyright (c) 1998 The NetBSD Foundation, Inc.
3 * Copyright (c) 2014 Andrey V. Elsukov <ae@FreeBSD.org>
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Heiko W.Rupp <hwr@pilhuhn.de>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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.
30 * $NetBSD: if_gre.h,v 1.13 2003/11/10 08:51:52 wiz Exp $
34 #ifndef _NET_IF_GRE_H_
35 #define _NET_IF_GRE_H_
38 /* GRE header according to RFC 2784 and RFC 2890 */
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 */
58 struct ip6_hdr gi6_ip6;
59 struct grehdr gi6_gre;
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 */
73 u_int gre_hlen; /* header size */
80 struct greip6 *gi6hdr;
83 const struct encaptab *gre_ecookie;
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)
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
102 int gre_input(struct mbuf **, int *, int);
104 int in_gre_attach(struct gre_softc *);
105 int in_gre_output(struct mbuf *, int, int);
108 int in6_gre_attach(struct gre_softc *);
109 int in6_gre_output(struct mbuf *, int, int);
112 * CISCO uses special type for GRE tunnel created as part of WCCP
113 * connection, while in fact those packets are just IPv4 encapsulated
116 #define ETHERTYPE_WCCP 0x883E
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)
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)
131 #define GRE_ENABLE_CSUM 0x0001
132 #define GRE_ENABLE_SEQ 0x0002
133 #define GRE_OPTMASK (GRE_ENABLE_CSUM|GRE_ENABLE_SEQ)
135 #endif /* _NET_IF_GRE_H_ */