2 * Copyright (C) 2012 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]))
25 #define SOL_NETLINK 270
28 #define ND_OPT_RECURSIVE_DNS 25
29 #define ND_OPT_DNSSL 31
32 DHCPV6_OPT_CLIENTID = 1,
33 DHCPV6_OPT_SERVERID = 2,
35 DHCPV6_OPT_IA_ADDR = 5,
38 DHCPV6_OPT_ELAPSED = 8,
39 DHCPV6_OPT_RELAY_MSG = 9,
41 DHCPV6_OPT_STATUS = 13,
42 DHCPV6_OPT_RAPID_COMMIT = 14,
43 DHCPV6_OPT_RECONF_MESSAGE = 19,
44 DHCPV6_OPT_RECONF_ACCEPT = 20,
45 DHCPV6_OPT_DNS_SERVERS = 23,
46 DHCPV6_OPT_DNS_DOMAIN = 24,
47 DHCPV6_OPT_IA_PD = 25,
48 DHCPV6_OPT_IA_PREFIX = 26,
49 DHCPV6_OPT_INFO_REFRESH = 32,
51 DHCPV6_OPT_NTP_SERVER = 56,
61 DHCPV6_MSG_UNKNOWN = 0,
62 DHCPV6_MSG_SOLICIT = 1,
63 DHCPV6_MSG_ADVERT = 2,
64 DHCPV6_MSG_REQUEST = 3,
66 DHCPV6_MSG_REBIND = 6,
68 DHCPV6_MSG_RELEASE = 8,
69 DHCPV6_MSG_DECLINE = 9,
70 DHCPV6_MSG_RECONF = 10,
71 DHCPV6_MSG_INFO_REQ = 11,
76 DHCPV6_NoAddrsAvail = 2,
77 DHCPV6_NoPrefixAvail = 6,
80 typedef int(reply_handler)(enum dhcpv6_msg orig,
81 const void *opt, const void *end, uint32_t elapsed);
83 // retransmission strategy
89 reply_handler *handler_reply;
90 int(*handler_finish)(uint32_t elapsed);
94 // DHCPv6 Protocol Headers
95 struct dhcpv6_header {
98 } __attribute__((packed));
100 struct dhcpv6_ia_hdr {
108 struct dhcpv6_ia_addr {
111 struct in6_addr addr;
116 struct dhcpv6_ia_prefix {
122 struct in6_addr addr;
133 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
134 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
135 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
136 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
137 _o += 4 + (_o[2] << 8 | _o[3]))
140 struct dhcpv6_server_cand {
141 bool has_noaddravail;
142 bool wants_reconfigure;
180 enum odhcp6c_ia_mode {
187 int init_dhcpv6(const char *ifname, int request_pd);
188 void dhcpv6_set_ia_na_mode(enum odhcp6c_ia_mode mode);
189 int dhcpv6_request(enum dhcpv6_msg type);
190 int dhcpv6_poll_reconfigure(void);
191 void dhcpv6_remove_addrs(void);
193 int init_rtnetlink(void);
194 int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
195 time_t pref, time_t valid);
197 int script_init(const char *path, const char *ifname);
198 ssize_t script_unhexlify(uint8_t *dst, size_t len, const char *src);
199 void script_call(const char *status);
202 // State manipulation
203 bool odhcp6c_signal_is_pending(void);
204 uint64_t odhcp6c_get_milli_time(void);
205 void odhcp6c_clear_state(enum odhcp6c_state state);
206 void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
207 size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
208 bool odhcp6c_commit_state(enum odhcp6c_state state, size_t old_len);
209 void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);