1/*
2 * dhcpcd - IPv6 ND handling
3 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name>
4 * All rights reserved
5
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef IPV6ND_H
29#define IPV6ND_H
30
31#ifdef INET6
32
33#include <time.h>
34
35#include "config.h"
36#include "dhcpcd.h"
37#include "ipv6.h"
38
39struct ra {
40 TAILQ_ENTRY(ra) next;
41 struct interface *iface;
42 struct in6_addr from;
43 char sfrom[INET6_ADDRSTRLEN];
44 uint8_t *data;
45 size_t data_len;
46 struct timespec acquired;
47 unsigned char flags;
48 uint32_t lifetime;
49 uint32_t reachable;
50 uint32_t retrans;
51 uint32_t mtu;
52 struct ipv6_addrhead addrs;
53 uint8_t hasdns;
54 uint8_t expired;
55};
56
57TAILQ_HEAD(ra_head, ra);
58
59struct rs_state {
60 struct nd_router_solicit *rs;
61 size_t rslen;
62 int rsprobes;
63 uint32_t retrans;
64#ifdef __sun
65 int nd_fd;
66#endif
67};
68
69#define RS_STATE(a) ((struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
70#define RS_CSTATE(a) ((const struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
71#define RS_STATE_RUNNING(a) (ipv6nd_hasra((a)) && ipv6nd_dadcompleted((a)))
72
73#ifndef MAX_RTR_SOLICITATION_DELAY
74#define MAX_RTR_SOLICITATION_DELAY 1 /* seconds */
75#define MAX_UNICAST_SOLICIT 3 /* 3 transmissions */
76#define RTR_SOLICITATION_INTERVAL 4 /* seconds */
77#define MAX_RTR_SOLICITATIONS 3 /* times */
78#define MAX_NEIGHBOR_ADVERTISEMENT 3 /* 3 transmissions */
79#endif
80
81/* On carrier up, expire known routers after RTR_CARRIER_EXPIRE seconds. */
82#define RTR_CARRIER_EXPIRE \
83 (MAX_RTR_SOLICITATION_DELAY + \
84 (MAX_RTR_SOLICITATIONS + 1) * \
85 RTR_SOLICITATION_INTERVAL)
86
87#define MAX_REACHABLE_TIME 3600000 /* milliseconds */
88#define REACHABLE_TIME 30000 /* milliseconds */
89#define RETRANS_TIMER 1000 /* milliseconds */
90#define DELAY_FIRST_PROBE_TIME 5 /* seconds */
91
92#define IPV6ND_REACHABLE (1 << 0)
93#define IPV6ND_ROUTER (1 << 1)
94
95void ipv6nd_printoptions(const struct dhcpcd_ctx *,
96 const struct dhcp_opt *, size_t);
97void ipv6nd_startrs(struct interface *);
98ssize_t ipv6nd_env(char **, const char *, const struct interface *);
99const struct ipv6_addr *ipv6nd_iffindaddr(const struct interface *ifp,
100 const struct in6_addr *addr, unsigned int flags);
101struct ipv6_addr *ipv6nd_findaddr(struct dhcpcd_ctx *,
102 const struct in6_addr *, unsigned int);
103ssize_t ipv6nd_free(struct interface *);
104void ipv6nd_expirera(void *arg);
105int ipv6nd_hasra(const struct interface *);
106int ipv6nd_hasradhcp(const struct interface *);
107void ipv6nd_handleifa(int, struct ipv6_addr *, pid_t);
108int ipv6nd_dadcompleted(const struct interface *);
109void ipv6nd_advertise(struct ipv6_addr *);
110void ipv6nd_expire(struct interface *, uint32_t);
111void ipv6nd_drop(struct interface *);
112void ipv6nd_neighbour(struct dhcpcd_ctx *, struct in6_addr *, int);
113#endif /* INET6 */
114
115#endif /* IPV6ND_H */
116