FreeBSD/Linux Kernel Cross Reference
sys/netinet6/nd6.h
1 /* $OpenBSD: nd6.h,v 1.95 2023/01/06 14:35:34 kn Exp $ */
2 /* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun 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 _NETINET6_ND6_H_
34 #define _NETINET6_ND6_H_
35
36 #include <sys/task.h>
37
38 #define ND6_LLINFO_PURGE -3
39 #define ND6_LLINFO_NOSTATE -2
40 #define ND6_LLINFO_INCOMPLETE 0
41 #define ND6_LLINFO_REACHABLE 1
42 #define ND6_LLINFO_STALE 2
43 #define ND6_LLINFO_DELAY 3
44 #define ND6_LLINFO_PROBE 4
45
46 /*
47 * Locks used to protect struct members in this file:
48 * N net lock
49 */
50
51 struct nd_ifinfo {
52 u_int32_t reachable; /* [N] Reachable Time */
53 int recalctm; /* [N] BaseReachable recalc timer */
54 };
55
56 struct in6_nbrinfo {
57 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
58 struct in6_addr addr; /* IPv6 address of the neighbor */
59 time_t expire; /* lifetime for NDP state transition */
60 long asked; /* number of queries already sent for addr */
61 int isrouter; /* if it acts as a router */
62 int state; /* reachability state */
63 };
64
65 struct in6_ndireq {
66 char ifname[IFNAMSIZ];
67 struct nd_ifinfo ndi;
68 };
69
70 /* protocol constants */
71 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/
72 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/
73 #define MAX_RTR_SOLICITATIONS 3
74
75 #define ND6_INFINITE_LIFETIME 0xffffffff
76
77 #ifdef _KERNEL
78
79 #include <sys/queue.h>
80
81 struct llinfo_nd6 {
82 TAILQ_ENTRY(llinfo_nd6) ln_list;
83 struct rtentry *ln_rt;
84 struct mbuf *ln_hold; /* last packet until resolved/timeout */
85 long ln_asked; /* number of queries already sent for addr */
86 int ln_byhint; /* # of times we made it reachable by UL hint */
87 short ln_state; /* reachability state */
88 short ln_router; /* 2^0: ND6 router bit */
89 };
90
91 #define ND6_LLINFO_PERMANENT(n) ((n)->ln_rt->rt_expire == 0)
92
93 /* node constants */
94 #define REACHABLE_TIME 30000 /* msec */
95 #define RETRANS_TIMER 1000 /* msec */
96 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
97 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
98 #define ND_COMPUTE_RTIME(x) \
99 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
100 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
101
102 extern int nd6_delay;
103 extern int nd6_umaxtries;
104 extern int nd6_mmaxtries;
105 extern int nd6_maxnudhint;
106 extern int nd6_gctimer;
107 extern int nd6_debug;
108
109 #define nd6log(x) do { if (nd6_debug) log x; } while (0)
110
111 struct nd_opts {
112 struct nd_opt_hdr *nd_opts_src_lladdr;
113 struct nd_opt_hdr *nd_opts_tgt_lladdr;
114 };
115
116 void nd6_init(void);
117 void nd6_ifattach(struct ifnet *);
118 void nd6_ifdetach(struct ifnet *);
119 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
120 int nd6_options(void *, int, struct nd_opts *);
121 struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *,
122 u_int);
123 void nd6_llinfo_settimer(const struct llinfo_nd6 *, unsigned int);
124 void nd6_purge(struct ifnet *);
125 void nd6_nud_hint(struct rtentry *);
126 void nd6_rtrequest(struct ifnet *, int, struct rtentry *);
127 int nd6_ioctl(u_long, caddr_t, struct ifnet *);
128 void nd6_cache_lladdr(struct ifnet *, const struct in6_addr *, char *,
129 int, int, int);
130 int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
131 struct sockaddr *, u_char *);
132 int nd6_need_cache(struct ifnet *);
133
134 void nd6_na_input(struct mbuf *, int, int);
135 void nd6_na_output(struct ifnet *, const struct in6_addr *,
136 const struct in6_addr *, u_long, int, struct sockaddr *);
137 void nd6_ns_input(struct mbuf *, int, int);
138 void nd6_ns_output(struct ifnet *, const struct in6_addr *,
139 const struct in6_addr *, const struct llinfo_nd6 *, int);
140 caddr_t nd6_ifptomac(struct ifnet *);
141 void nd6_dad_start(struct ifaddr *);
142 void nd6_dad_stop(struct ifaddr *);
143
144 void nd6_rtr_cache(struct mbuf *, int, int, int);
145
146 int rt6_flush(struct in6_addr *, struct ifnet *);
147
148 void nd6_expire_timer_update(struct in6_ifaddr *);
149 #endif /* _KERNEL */
150
151 #endif /* _NETINET6_ND6_H_ */
Cache object: 440fa6c09268ccd3c578fcd043e390cb
|