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
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
35 DHCPV6_OPT_CLIENTID
= 1,
36 DHCPV6_OPT_SERVERID
= 2,
38 DHCPV6_OPT_IA_ADDR
= 5,
41 DHCPV6_OPT_ELAPSED
= 8,
42 DHCPV6_OPT_RELAY_MSG
= 9,
44 DHCPV6_OPT_STATUS
= 13,
45 DHCPV6_OPT_RAPID_COMMIT
= 14,
46 DHCPV6_OPT_RECONF_MESSAGE
= 19,
47 DHCPV6_OPT_RECONF_ACCEPT
= 20,
48 DHCPV6_OPT_DNS_SERVERS
= 23,
49 DHCPV6_OPT_DNS_DOMAIN
= 24,
50 DHCPV6_OPT_IA_PD
= 25,
51 DHCPV6_OPT_IA_PREFIX
= 26,
52 DHCPV6_OPT_INFO_REFRESH
= 32,
54 DHCPV6_OPT_NTP_SERVER
= 56,
55 DHCPV6_OPT_SIP_SERVER_D
= 21,
56 DHCPV6_OPT_SIP_SERVER_A
= 22,
57 DHCPV6_OPT_AFTR_NAME
= 64,
58 DHCPV6_OPT_PD_EXCLUDE
= 67,
59 DHCPV6_OPT_SOL_MAX_RT
= 82,
60 DHCPV6_OPT_INF_MAX_RT
= 83,
61 #ifdef EXT_PREFIX_CLASS
62 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
63 DHCPV6_OPT_PREFIX_CLASS
= EXT_PREFIX_CLASS
,
74 DHCPV6_MSG_UNKNOWN
= 0,
75 DHCPV6_MSG_SOLICIT
= 1,
76 DHCPV6_MSG_ADVERT
= 2,
77 DHCPV6_MSG_REQUEST
= 3,
79 DHCPV6_MSG_REBIND
= 6,
81 DHCPV6_MSG_RELEASE
= 8,
82 DHCPV6_MSG_DECLINE
= 9,
83 DHCPV6_MSG_RECONF
= 10,
84 DHCPV6_MSG_INFO_REQ
= 11,
90 DHCPV6_UnspecFail
= 1,
91 DHCPV6_NoAddrsAvail
= 2,
94 DHCPV6_UseMulticast
= 5,
95 DHCPV6_NoPrefixAvail
= 6,
99 typedef int(reply_handler
)(enum dhcpv6_msg orig
, const int rc
,
100 const void *opt
, const void *end
);
102 // retransmission strategy
109 reply_handler
*handler_reply
;
110 int(*handler_finish
)(void);
113 // DHCPv6 Protocol Headers
114 struct dhcpv6_header
{
117 } __attribute__((packed
));
119 struct dhcpv6_ia_hdr
{
127 struct dhcpv6_ia_addr
{
130 struct in6_addr addr
;
135 struct dhcpv6_ia_prefix
{
141 struct in6_addr addr
;
151 struct dhcpv6_auth_reconfigure
{
163 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
164 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
165 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
166 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
167 _o += 4 + (_o[2] << 8 | _o[3]))
170 struct dhcpv6_server_cand
{
171 bool has_noaddravail
;
172 bool wants_reconfigure
;
220 enum odhcp6c_ia_mode
{
227 struct odhcp6c_entry
{
228 struct in6_addr router
;
231 struct in6_addr target
;
240 int init_dhcpv6(const char *ifname
, int request_pd
, int sol_timeout
);
241 void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na
, enum odhcp6c_ia_mode pd
);
242 int dhcpv6_request(enum dhcpv6_msg type
);
243 int dhcpv6_poll_reconfigure(void);
244 int dhcpv6_promote_server_cand(void);
246 int init_rtnetlink(void);
247 int set_rtnetlink_addr(int ifindex
, const struct in6_addr
*addr
,
248 uint32_t pref
, uint32_t valid
);
250 int script_init(const char *path
, const char *ifname
);
251 ssize_t
script_unhexlify(uint8_t *dst
, size_t len
, const char *src
);
252 void script_call(const char *status
);
253 void script_delay_call(const char *status
, int timeout
);
255 bool odhcp6c_signal_process(void);
256 uint64_t odhcp6c_get_milli_time(void);
257 void odhcp6c_random(void *buf
, size_t len
);
258 bool odhcp6c_is_bound(void);
260 // State manipulation
261 void odhcp6c_clear_state(enum odhcp6c_state state
);
262 void odhcp6c_add_state(enum odhcp6c_state state
, const void *data
, size_t len
);
263 void odhcp6c_insert_state(enum odhcp6c_state state
, size_t offset
, const void *data
, size_t len
);
264 size_t odhcp6c_remove_state(enum odhcp6c_state state
, size_t offset
, size_t len
);
265 void* odhcp6c_move_state(enum odhcp6c_state state
, size_t *len
);
266 void* odhcp6c_get_state(enum odhcp6c_state state
, size_t *len
);
268 // Entry manipulation
269 struct odhcp6c_entry
* odhcp6c_find_entry(enum odhcp6c_state state
, const struct odhcp6c_entry
*new);
270 bool odhcp6c_update_entry(enum odhcp6c_state state
, struct odhcp6c_entry
*new);
271 bool odhcp6c_update_entry_safe(enum odhcp6c_state state
, struct odhcp6c_entry
*new, uint32_t safe
);
273 void odhcp6c_expire(void);
274 uint32_t odhcp6c_elapsed(void);