2 * Copyright (C) 2012-2013 Steven Barth <steven@midlink.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
17 #include <netinet/in.h>
19 #define _unused __attribute__((unused))
20 #define _packed __attribute__((packed))
22 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
24 #define ND_OPT_RECURSIVE_DNS 25
25 #define ND_OPT_DNSSL 31
28 DHCPV6_OPT_CLIENTID = 1,
29 DHCPV6_OPT_SERVERID = 2,
31 DHCPV6_OPT_IA_ADDR = 5,
34 DHCPV6_OPT_ELAPSED = 8,
35 DHCPV6_OPT_RELAY_MSG = 9,
37 DHCPV6_OPT_UNICAST = 12,
38 DHCPV6_OPT_STATUS = 13,
39 DHCPV6_OPT_RAPID_COMMIT = 14,
40 DHCPV6_OPT_RECONF_MESSAGE = 19,
41 DHCPV6_OPT_RECONF_ACCEPT = 20,
42 DHCPV6_OPT_DNS_SERVERS = 23,
43 DHCPV6_OPT_DNS_DOMAIN = 24,
44 DHCPV6_OPT_IA_PD = 25,
45 DHCPV6_OPT_IA_PREFIX = 26,
46 DHCPV6_OPT_INFO_REFRESH = 32,
48 DHCPV6_OPT_NTP_SERVER = 56,
49 DHCPV6_OPT_SIP_SERVER_D = 21,
50 DHCPV6_OPT_SIP_SERVER_A = 22,
51 DHCPV6_OPT_AFTR_NAME = 64,
52 DHCPV6_OPT_PD_EXCLUDE = 67,
53 #ifdef EXT_PREFIX_CLASS
54 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
55 DHCPV6_OPT_PREFIX_CLASS = EXT_PREFIX_CLASS,
66 DHCPV6_MSG_UNKNOWN = 0,
67 DHCPV6_MSG_SOLICIT = 1,
68 DHCPV6_MSG_ADVERT = 2,
69 DHCPV6_MSG_REQUEST = 3,
71 DHCPV6_MSG_REBIND = 6,
73 DHCPV6_MSG_RELEASE = 8,
74 DHCPV6_MSG_DECLINE = 9,
75 DHCPV6_MSG_RECONF = 10,
76 DHCPV6_MSG_INFO_REQ = 11,
82 DHCPV6_UnspecFail = 1,
83 DHCPV6_NoAddrsAvail = 2,
86 DHCPV6_UseMulticast = 5,
87 DHCPV6_NoPrefixAvail = 6,
91 typedef int(reply_handler)(enum dhcpv6_msg orig, const int rc,
92 const void *opt, const void *end);
94 // retransmission strategy
101 reply_handler *handler_reply;
102 int(*handler_finish)(void);
105 // DHCPv6 Protocol Headers
106 struct dhcpv6_header {
109 } __attribute__((packed));
111 struct dhcpv6_ia_hdr {
119 struct dhcpv6_ia_addr {
122 struct in6_addr addr;
127 struct dhcpv6_ia_prefix {
133 struct in6_addr addr;
143 struct dhcpv6_auth_reconfigure {
155 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
156 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
157 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
158 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
159 _o += 4 + (_o[2] << 8 | _o[3]))
162 struct dhcpv6_server_cand {
163 bool has_noaddravail;
164 bool wants_reconfigure;
168 struct in6_addr server_addr;
212 enum odhcp6c_ia_mode {
219 struct odhcp6c_entry {
220 struct in6_addr router;
223 struct in6_addr target;
232 int init_dhcpv6(const char *ifname, int request_pd, int sol_timeout);
233 void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na, enum odhcp6c_ia_mode pd);
234 int dhcpv6_request(enum dhcpv6_msg type);
235 int dhcpv6_poll_reconfigure(void);
237 int init_rtnetlink(void);
238 int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
239 uint32_t pref, uint32_t valid);
241 int script_init(const char *path, const char *ifname);
242 ssize_t script_unhexlify(uint8_t *dst, size_t len, const char *src);
243 void script_call(const char *status);
244 void script_delay_call(const char *status, int timeout);
246 bool odhcp6c_signal_process(void);
247 uint64_t odhcp6c_get_milli_time(void);
248 void odhcp6c_random(void *buf, size_t len);
249 bool odhcp6c_is_bound(void);
250 bool odhcp6c_addr_in_scope(const struct in6_addr *addr);
252 // State manipulation
253 void odhcp6c_clear_state(enum odhcp6c_state state);
254 void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
255 size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
256 void* odhcp6c_move_state(enum odhcp6c_state state, size_t *len);
257 void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);
259 // Entry manipulation
260 struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new);
261 bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new);
262 bool odhcp6c_update_entry_safe(enum odhcp6c_state state, struct odhcp6c_entry *new, uint32_t safe);
264 void odhcp6c_expire(void);
265 uint32_t odhcp6c_elapsed(void);