2 * Copyright (C) 2012-2014 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
27 #define DHCPV6_SOL_MAX_RT 3600
28 #define DHCPV6_REQ_MAX_RT 30
29 #define DHCPV6_CNF_MAX_RT 4
30 #define DHCPV6_REN_MAX_RT 600
31 #define DHCPV6_REB_MAX_RT 600
32 #define DHCPV6_INF_MAX_RT 3600
34 #define DEFAULT_MIN_UPDATE_INTERVAL 30
37 DHCPV6_OPT_CLIENTID
= 1,
38 DHCPV6_OPT_SERVERID
= 2,
40 DHCPV6_OPT_IA_ADDR
= 5,
43 DHCPV6_OPT_ELAPSED
= 8,
44 DHCPV6_OPT_RELAY_MSG
= 9,
46 DHCPV6_OPT_STATUS
= 13,
47 DHCPV6_OPT_RAPID_COMMIT
= 14,
48 DHCPV6_OPT_USER_CLASS
= 15,
49 DHCPV6_OPT_VENDOR_CLASS
= 16,
50 DHCPV6_OPT_RECONF_MESSAGE
= 19,
51 DHCPV6_OPT_RECONF_ACCEPT
= 20,
52 DHCPV6_OPT_DNS_SERVERS
= 23,
53 DHCPV6_OPT_DNS_DOMAIN
= 24,
54 DHCPV6_OPT_IA_PD
= 25,
55 DHCPV6_OPT_IA_PREFIX
= 26,
56 DHCPV6_OPT_SNTP_SERVERS
= 31,
57 DHCPV6_OPT_INFO_REFRESH
= 32,
59 DHCPV6_OPT_NTP_SERVER
= 56,
60 DHCPV6_OPT_SIP_SERVER_D
= 21,
61 DHCPV6_OPT_SIP_SERVER_A
= 22,
62 DHCPV6_OPT_AFTR_NAME
= 64,
63 DHCPV6_OPT_PD_EXCLUDE
= 67,
64 DHCPV6_OPT_SOL_MAX_RT
= 82,
65 DHCPV6_OPT_INF_MAX_RT
= 83,
66 #ifdef EXT_PREFIX_CLASS
67 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
68 DHCPV6_OPT_PREFIX_CLASS
= EXT_PREFIX_CLASS
,
79 DHCPV6_MSG_UNKNOWN
= 0,
80 DHCPV6_MSG_SOLICIT
= 1,
81 DHCPV6_MSG_ADVERT
= 2,
82 DHCPV6_MSG_REQUEST
= 3,
84 DHCPV6_MSG_REBIND
= 6,
86 DHCPV6_MSG_RELEASE
= 8,
87 DHCPV6_MSG_DECLINE
= 9,
88 DHCPV6_MSG_RECONF
= 10,
89 DHCPV6_MSG_INFO_REQ
= 11,
95 DHCPV6_UnspecFail
= 1,
96 DHCPV6_NoAddrsAvail
= 2,
99 DHCPV6_UseMulticast
= 5,
100 DHCPV6_NoPrefixAvail
= 6,
105 DHCPV6_STRICT_OPTIONS
= 1,
106 DHCPV6_CLIENT_FQDN
= 2,
107 DHCPV6_ACCEPT_RECONFIGURE
= 4,
110 typedef int(reply_handler
)(enum dhcpv6_msg orig
, const int rc
,
111 const void *opt
, const void *end
);
113 // retransmission strategy
120 reply_handler
*handler_reply
;
121 int(*handler_finish
)(void);
124 // DHCPv6 Protocol Headers
125 struct dhcpv6_header
{
128 } __attribute__((packed
));
130 struct dhcpv6_ia_hdr
{
138 struct dhcpv6_ia_addr
{
141 struct in6_addr addr
;
146 struct dhcpv6_ia_prefix
{
152 struct in6_addr addr
;
162 struct dhcpv6_auth_reconfigure
{
174 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
175 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
176 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
177 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
178 _o += 4 + (_o[2] << 8 | _o[3]))
181 struct dhcpv6_server_cand
{
182 bool has_noaddravail
;
183 bool wants_reconfigure
;
235 enum odhcp6c_ia_mode
{
242 struct odhcp6c_entry
{
243 struct in6_addr router
;
246 struct in6_addr target
;
255 struct odhcp6c_request_prefix
{
260 int init_dhcpv6(const char *ifname
, unsigned int client_options
, int sol_timeout
);
261 void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na
, enum odhcp6c_ia_mode pd
);
262 int dhcpv6_request(enum dhcpv6_msg type
);
263 int dhcpv6_poll_reconfigure(void);
264 int dhcpv6_promote_server_cand(void);
266 int init_rtnetlink(void);
267 int set_rtnetlink_addr(int ifindex
, const struct in6_addr
*addr
,
268 uint32_t pref
, uint32_t valid
);
270 int script_init(const char *path
, const char *ifname
);
271 ssize_t
script_unhexlify(uint8_t *dst
, size_t len
, const char *src
);
272 void script_call(const char *status
);
273 void script_delay_call(const char *status
, int timeout
);
275 bool odhcp6c_signal_process(void);
276 uint64_t odhcp6c_get_milli_time(void);
277 void odhcp6c_random(void *buf
, size_t len
);
278 bool odhcp6c_is_bound(void);
280 // State manipulation
281 void odhcp6c_clear_state(enum odhcp6c_state state
);
282 void odhcp6c_add_state(enum odhcp6c_state state
, const void *data
, size_t len
);
283 void odhcp6c_append_state(enum odhcp6c_state state
, const void *data
, size_t len
);
284 void odhcp6c_insert_state(enum odhcp6c_state state
, size_t offset
, const void *data
, size_t len
);
285 size_t odhcp6c_remove_state(enum odhcp6c_state state
, size_t offset
, size_t len
);
286 void* odhcp6c_move_state(enum odhcp6c_state state
, size_t *len
);
287 void* odhcp6c_get_state(enum odhcp6c_state state
, size_t *len
);
289 // Entry manipulation
290 struct odhcp6c_entry
* odhcp6c_find_entry(enum odhcp6c_state state
, const struct odhcp6c_entry
*new);
291 bool odhcp6c_update_entry(enum odhcp6c_state state
, struct odhcp6c_entry
*new);
292 bool odhcp6c_update_entry_safe(enum odhcp6c_state state
, struct odhcp6c_entry
*new, uint32_t safe
);
294 void odhcp6c_expire(void);
295 uint32_t odhcp6c_elapsed(void);