1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - IPv6 ND handling
4 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 struct interface *iface;
44 char sfrom[INET6_ADDRSTRLEN];
47 struct timespec acquired;
54 struct ipv6_addrhead addrs;
60 TAILQ_HEAD(ra_head, ra);
63 struct nd_router_solicit *rs;
72 #define RS_STATE(a) ((struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
73 #define RS_CSTATE(a) ((const struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
74 #define RS_STATE_RUNNING(a) (ipv6nd_hasra((a)) && ipv6nd_dadcompleted((a)))
76 #ifndef MAX_RTR_SOLICITATION_DELAY
77 #define MAX_RTR_SOLICITATION_DELAY 1 /* seconds */
78 #define MAX_UNICAST_SOLICIT 3 /* 3 transmissions */
79 #define RTR_SOLICITATION_INTERVAL 4 /* seconds */
80 #define MAX_RTR_SOLICITATIONS 3 /* times */
81 #define MAX_NEIGHBOR_ADVERTISEMENT 3 /* 3 transmissions */
84 #define IPV6_DEFHLIM 64
88 /* On carrier up, expire known routers after RTR_CARRIER_EXPIRE seconds. */
89 #define RTR_CARRIER_EXPIRE \
90 (MAX_RTR_SOLICITATION_DELAY + \
91 (MAX_RTR_SOLICITATIONS + 1) * \
92 RTR_SOLICITATION_INTERVAL)
94 #define MAX_REACHABLE_TIME 3600000 /* milliseconds */
95 #define REACHABLE_TIME 30000 /* milliseconds */
96 #define RETRANS_TIMER 1000 /* milliseconds */
97 #define DELAY_FIRST_PROBE_TIME 5 /* seconds */
99 void ipv6nd_printoptions(const struct dhcpcd_ctx *,
100 const struct dhcp_opt *, size_t);
101 void ipv6nd_startrs(struct interface *);
102 ssize_t ipv6nd_env(FILE *, const struct interface *);
103 const struct ipv6_addr *ipv6nd_iffindaddr(const struct interface *ifp,
104 const struct in6_addr *addr, unsigned int flags);
105 struct ipv6_addr *ipv6nd_findaddr(struct dhcpcd_ctx *,
106 const struct in6_addr *, unsigned int);
107 ssize_t ipv6nd_free(struct interface *);
108 void ipv6nd_expirera(void *arg);
109 bool ipv6nd_hasralifetime(const struct interface *, bool);
110 #define ipv6nd_hasra(i) ipv6nd_hasralifetime((i), false)
111 bool ipv6nd_hasradhcp(const struct interface *);
112 void ipv6nd_handleifa(int, struct ipv6_addr *, pid_t);
113 int ipv6nd_dadcompleted(const struct interface *);
114 void ipv6nd_advertise(struct ipv6_addr *);
115 void ipv6nd_startexpire(struct interface *);
116 void ipv6nd_drop(struct interface *);
117 void ipv6nd_neighbour(struct dhcpcd_ctx *, struct in6_addr *, bool);
120 #endif /* IPV6ND_H */