1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* $OpenBSD: nd6.h,v 1.76 2020/03/28 16:15:45 florian Exp $ */
/* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NETINET6_ND6_H_
#define _NETINET6_ND6_H_
#include <sys/task.h>
#define ND6_LLINFO_PURGE -3
#define ND6_LLINFO_NOSTATE -2
#define ND6_LLINFO_INCOMPLETE 0
#define ND6_LLINFO_REACHABLE 1
#define ND6_LLINFO_STALE 2
#define ND6_LLINFO_DELAY 3
#define ND6_LLINFO_PROBE 4
struct nd_ifinfo {
u_int32_t basereachable; /* BaseReachableTime */
u_int32_t reachable; /* Reachable Time */
u_int32_t retrans; /* Retrans Timer */
int recalctm; /* BaseReacable re-calculation timer */
u_int8_t initialized; /* Flag to see the entry is initialized */
};
struct in6_nbrinfo {
char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
struct in6_addr addr; /* IPv6 address of the neighbor */
time_t expire; /* lifetime for NDP state transition */
long asked; /* number of queries already sent for addr */
int isrouter; /* if it acts as a router */
int state; /* reachability state */
};
struct prf_ra {
u_int onlink : 1;
u_int autonomous : 1;
u_int router : 1;
u_int reserved : 5;
};
struct in6_ndireq {
char ifname[IFNAMSIZ];
struct nd_ifinfo ndi;
};
struct in6_ndifreq {
char ifname[IFNAMSIZ];
u_long ifindex;
};
/* Prefix status */
#define NDPRF_ONLINK 0x1
#define NDPRF_DETACHED 0x2
#define NDPRF_HOME 0x4
/* protocol constants */
#define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/
#define RTR_SOLICITATION_INTERVAL 4 /*4sec*/
#define MAX_RTR_SOLICITATIONS 3
#define ND6_INFINITE_LIFETIME 0xffffffff
#ifdef _KERNEL
#include <sys/queue.h>
#define ND_IFINFO(ifp) \
(((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
#define RS_LHCOOKIE(ifp) \
((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->rs_lhcookie
struct llinfo_nd6 {
TAILQ_ENTRY(llinfo_nd6) ln_list;
struct rtentry *ln_rt;
struct mbuf *ln_hold; /* last packet until resolved/timeout */
long ln_asked; /* number of queries already sent for addr */
int ln_byhint; /* # of times we made it reachable by UL hint */
short ln_state; /* reachability state */
short ln_router; /* 2^0: ND6 router bit */
};
#define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
#define ND6_LLINFO_PERMANENT(n) ((n)->ln_rt->rt_expire == 0)
/* node constants */
#define MAX_REACHABLE_TIME 3600000 /* msec */
#define REACHABLE_TIME 30000 /* msec */
#define RETRANS_TIMER 1000 /* msec */
#define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
#define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
#define ND_COMPUTE_RTIME(x) \
(((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
extern int nd6_delay;
extern int nd6_umaxtries;
extern int nd6_mmaxtries;
extern int nd6_maxnudhint;
extern int nd6_gctimer;
extern int nd6_debug;
#define nd6log(x) do { if (nd6_debug) log x; } while (0)
union nd_opts {
struct nd_opt_hdr *nd_opt_array[9];
struct {
struct nd_opt_hdr *zero;
struct nd_opt_hdr *src_lladdr;
struct nd_opt_hdr *tgt_lladdr;
struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
struct nd_opt_rd_hdr *rh;
struct nd_opt_mtu *mtu;
struct nd_opt_hdr *search; /* multiple opts */
struct nd_opt_hdr *last; /* multiple opts */
int done;
struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
} nd_opt_each;
};
#define nd_opts_src_lladdr nd_opt_each.src_lladdr
#define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
#define nd_opts_pi nd_opt_each.pi_beg
#define nd_opts_pi_end nd_opt_each.pi_end
#define nd_opts_rh nd_opt_each.rh
#define nd_opts_mtu nd_opt_each.mtu
#define nd_opts_search nd_opt_each.search
#define nd_opts_last nd_opt_each.last
#define nd_opts_done nd_opt_each.done
void nd6_init(void);
struct nd_ifinfo *nd6_ifattach(struct ifnet *);
void nd6_ifdetach(struct nd_ifinfo *);
int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *);
void nd6_option_init(void *, int, union nd_opts *);
struct nd_opt_hdr *nd6_option(union nd_opts *);
int nd6_options(union nd_opts *);
struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, u_int);
void nd6_setmtu(struct ifnet *);
void nd6_llinfo_settimer(struct llinfo_nd6 *, unsigned int);
void nd6_purge(struct ifnet *);
void nd6_nud_hint(struct rtentry *);
void nd6_rtrequest(struct ifnet *, int, struct rtentry *);
int nd6_ioctl(u_long, caddr_t, struct ifnet *);
void nd6_cache_lladdr(struct ifnet *, struct in6_addr *, char *, int, int, int);
int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
struct sockaddr *, u_char *);
int nd6_need_cache(struct ifnet *);
void nd6_na_input(struct mbuf *, int, int);
void nd6_na_output(struct ifnet *, struct in6_addr *,
struct in6_addr *, u_long, int, struct sockaddr *);
void nd6_ns_input(struct mbuf *, int, int);
void nd6_ns_output(struct ifnet *, struct in6_addr *,
struct in6_addr *, struct llinfo_nd6 *, int);
caddr_t nd6_ifptomac(struct ifnet *);
void nd6_dad_start(struct ifaddr *);
void nd6_dad_stop(struct ifaddr *);
void nd6_rtr_cache(struct mbuf *, int, int, int);
int in6_ifdel(struct ifnet *, struct in6_addr *);
int rt6_flush(struct in6_addr *, struct ifnet *);
void nd6_expire_timer_update(struct in6_ifaddr *);
#endif /* _KERNEL */
#endif /* _NETINET6_ND6_H_ */
|
