FreeBSD/Linux Kernel Cross Reference
sys/net/if_gif.h
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_IGNORE_SOURCE 0x0002
130 #define GIF_OPTMASK (GIF_IGNORE_SOURCE)
131
132 #endif /* _NET_IF_GIF_H_ */
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