1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2015 Roy Marples <roy (at) 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 #include <time.h> 32 33 #include "config.h" 34 #include "dhcpcd.h" 35 #include "ipv6.h" 36 37 struct ra_opt { 38 TAILQ_ENTRY(ra_opt) next; 39 uint16_t type; 40 struct timespec expire; 41 char *option; 42 }; 43 44 struct ra { 45 TAILQ_ENTRY(ra) next; 46 struct interface *iface; 47 struct in6_addr from; 48 char sfrom[INET6_ADDRSTRLEN]; 49 unsigned char *data; 50 size_t data_len; 51 struct timespec received; 52 unsigned char flags; 53 uint32_t lifetime; 54 uint32_t reachable; 55 uint32_t retrans; 56 uint32_t mtu; 57 struct ipv6_addrhead addrs; 58 TAILQ_HEAD(, ra_opt) options; 59 uint8_t expired; 60 uint8_t no_public_warned; 61 }; 62 63 TAILQ_HEAD(ra_head, ra); 64 65 struct rs_state { 66 unsigned char *rs; 67 size_t rslen; 68 int rsprobes; 69 }; 70 71 #define RS_STATE(a) ((struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND]) 72 #define RS_STATE_RUNNING(a) (ipv6nd_hasra((a)) && ipv6nd_dadcompleted((a))) 73 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 79 /* On carrier up, expire known routers after RTR_CARRIER_EXPIRE seconds. */ 80 #define RTR_CARRIER_EXPIRE \ 81 (MAX_RTR_SOLICITATION_DELAY + \ 82 (MAX_RTR_SOLICITATIONS + 1) * \ 83 RTR_SOLICITATION_INTERVAL) 84 85 #define MAX_REACHABLE_TIME 3600000 /* milliseconds */ 86 #define REACHABLE_TIME 30000 /* milliseconds */ 87 #define RETRANS_TIMER 1000 /* milliseconds */ 88 #define DELAY_FIRST_PROBE_TIME 5 /* seconds */ 89 90 #define IPV6ND_REACHABLE (1 << 0) 91 #define IPV6ND_ROUTER (1 << 1) 92 93 #ifdef INET6 94 void ipv6nd_startrs(struct interface *); 95 ssize_t ipv6nd_env(char **, const char *, const struct interface *); 96 struct ipv6_addr *ipv6nd_findaddr(struct dhcpcd_ctx *, 97 const struct in6_addr *, short); 98 void ipv6nd_freedrop_ra(struct ra *, int); 99 #define ipv6nd_free_ra(ra) ipv6nd_freedrop_ra((ra), 0) 100 #define ipv6nd_drop_ra(ra) ipv6nd_freedrop_ra((ra), 1) 101 ssize_t ipv6nd_free(struct interface *); 102 void ipv6nd_expirera(void *arg); 103 int ipv6nd_hasra(const struct interface *); 104 int ipv6nd_hasradhcp(const struct interface *); 105 void ipv6nd_runignoredra(struct interface *); 106 void ipv6nd_handleifa(struct dhcpcd_ctx *, int, 107 const char *, const struct in6_addr *, int); 108 int ipv6nd_dadcompleted(const struct interface *); 109 void ipv6nd_expire(struct interface *, uint32_t); 110 void ipv6nd_drop(struct interface *); 111 void ipv6nd_neighbour(struct dhcpcd_ctx *, struct in6_addr *, int); 112 #else 113 #define ipv6nd_startrs(a) {} 114 #define ipv6nd_findaddr(a, b, c) (0) 115 #define ipv6nd_free(a) {} 116 #define ipv6nd_hasra(a) (0) 117 #define ipv6nd_dadcompleted(a) (0) 118 #define ipv6nd_drop(a) {} 119 #endif 120 121 #endif 122
