FreeBSD/Linux Kernel Cross Reference
sys/net/if_gif.h
1 /* $FreeBSD: src/sys/net/if_gif.h,v 1.21 2008/10/02 15:37:58 zec Exp $ */
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
48 struct encaptab;
49
50 extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
51 int af);
52 extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
53 int af);
54 extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
55 extern void (*ng_gif_attach_p)(struct ifnet *ifp);
56 extern void (*ng_gif_detach_p)(struct ifnet *ifp);
57
58 struct 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 LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */
75 };
76 #define GIF2IFP(sc) ((sc)->gif_ifp)
77 #define GIF_LOCK_INIT(sc) mtx_init(&(sc)->gif_mtx, "gif softc", \
78 NULL, MTX_DEF)
79 #define GIF_LOCK_DESTROY(sc) mtx_destroy(&(sc)->gif_mtx)
80 #define GIF_LOCK(sc) mtx_lock(&(sc)->gif_mtx)
81 #define GIF_UNLOCK(sc) mtx_unlock(&(sc)->gif_mtx)
82 #define GIF_LOCK_ASSERT(sc) mtx_assert(&(sc)->gif_mtx, MA_OWNED)
83
84 #define gif_ro gifsc_gifscr.gifscr_ro
85 #ifdef INET6
86 #define gif_ro6 gifsc_gifscr.gifscr_ro6
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 #define MTAG_GIF 1080679712
94 #define MTAG_GIF_CALLED 0
95
96 struct etherip_header {
97 u_int8_t eip_ver; /* version/reserved */
98 u_int8_t eip_pad; /* required padding byte */
99 };
100 #define ETHERIP_VER_VERS_MASK 0x0f
101 #define ETHERIP_VER_RSVD_MASK 0xf0
102 #define ETHERIP_VERSION 0x03
103
104 /* Prototypes */
105 void gif_input(struct mbuf *, int, struct ifnet *);
106 int gif_output(struct ifnet *, struct mbuf *, struct sockaddr *,
107 struct rtentry *);
108 int gif_ioctl(struct ifnet *, u_long, caddr_t);
109 int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *);
110 void gif_delete_tunnel(struct ifnet *);
111 int gif_encapcheck(const struct mbuf *, int, int, void *);
112
113 /*
114 * Virtualization support
115 */
116 #ifdef VIMAGE
117 struct vnet_gif {
118 LIST_HEAD(, gif_softc) _gif_softc_list;
119 int _max_gif_nesting;
120 int _parallel_tunnels;
121 int _ip_gif_ttl;
122 int _ip6_gif_hlim;
123 };
124 #endif
125
126 #define INIT_VNET_GIF(vnet) \
127 INIT_FROM_VNET(vnet, VNET_MOD_GIF, struct vnet_gif, vnet_gif)
128
129 #define VNET_GIF(sym) VSYM(vnet_gif, sym)
130
131 #define V_gif_softc_list VNET_GIF(gif_softc_list)
132 #define V_max_gif_nesting VNET_GIF(max_gif_nesting)
133 #define V_parallel_tunnels VNET_GIF(parallel_tunnels)
134 #define V_ip_gif_ttl VNET_GIF(ip_gif_ttl)
135 #define V_ip6_gif_hlim VNET_GIF(ip6_gif_hlim)
136
137 #endif /* _KERNEL */
138
139 #endif /* _NET_IF_GIF_H_ */
140
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