1/* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef _NET_IF_GIF_H_
36#define _NET_IF_GIF_H_
37
38#ifdef _KERNEL
39
40struct ip;
41struct ip6_hdr;
42
43extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
44 int af);
45extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
46 int af);
47extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
48extern void (*ng_gif_attach_p)(struct ifnet *ifp);
49extern void (*ng_gif_detach_p)(struct ifnet *ifp);
50
51struct gif_softc {
52 struct ifnet *gif_ifp;
53 int gif_family;
54 int gif_flags;
55 u_int gif_fibnum;
56 u_int gif_options;
57 void *gif_netgraph; /* netgraph node info */
58 union {
59 void *hdr;
60 struct ip *iphdr;
61 struct ip6_hdr *ip6hdr;
62 } gif_uhdr;
63
64 CK_LIST_ENTRY(gif_softc) chain;
65 CK_LIST_ENTRY(gif_softc) srchash;
66};
67CK_LIST_HEAD(gif_list, gif_softc);
68MALLOC_DECLARE(M_GIF);
69
70#ifndef GIF_HASH_SIZE
71#define GIF_HASH_SIZE (1 << 4)
72#endif
73
74#define GIF2IFP(sc) ((sc)->gif_ifp)
75#define gif_iphdr gif_uhdr.iphdr
76#define gif_hdr gif_uhdr.hdr
77#define gif_ip6hdr gif_uhdr.ip6hdr
78
79#define GIF_MTU (1280) /* Default MTU */
80#define GIF_MTU_MIN (1280) /* Minimum MTU */
81#define GIF_MTU_MAX (8192) /* Maximum MTU */
82
83struct etherip_header {
84#if BYTE_ORDER == LITTLE_ENDIAN
85 u_int eip_resvl:4, /* reserved */
86 eip_ver:4; /* version */
87#endif
88#if BYTE_ORDER == BIG_ENDIAN
89 u_int eip_ver:4, /* version */
90 eip_resvl:4; /* reserved */
91#endif
92 u_int8_t eip_resvh; /* reserved */
93} __packed;
94
95#define ETHERIP_VERSION 0x3
96
97#define GIF_WAIT() epoch_wait_preempt(net_epoch_preempt)
98
99/* Prototypes */
100struct gif_list *gif_hashinit(void);
101void gif_hashdestroy(struct gif_list *);
102
103void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
104int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
105 struct route *);
106
107void in_gif_init(void);
108void in_gif_uninit(void);
109int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
110int in_gif_ioctl(struct gif_softc *, u_long, caddr_t);
111int in_gif_setopts(struct gif_softc *, u_int);
112
113void in6_gif_init(void);
114void in6_gif_uninit(void);
115int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
116int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t);
117int in6_gif_setopts(struct gif_softc *, u_int);
118#endif /* _KERNEL */
119
120#define GIFGOPTS _IOWR('i', 150, struct ifreq)
121#define GIFSOPTS _IOW('i', 151, struct ifreq)
122
123#define GIF_NOCLAMP 0x0001
124#define GIF_IGNORE_SOURCE 0x0002
125#define GIF_OPTMASK (GIF_NOCLAMP|GIF_IGNORE_SOURCE)
126
127#endif /* _NET_IF_GIF_H_ */