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 version 2
6 * as published by 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 version 2 for more details.
16 #include <libubox/ustream.h>
19 #define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
20 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
22 #define ALL_DHCPV6_SERVERS {{{0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
23 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03}}}
25 #define DHCPV6_CLIENT_PORT 546
26 #define DHCPV6_SERVER_PORT 547
28 #define DHCPV6_MSG_SOLICIT 1
29 #define DHCPV6_MSG_ADVERTISE 2
30 #define DHCPV6_MSG_REQUEST 3
31 #define DHCPV6_MSG_CONFIRM 4
32 #define DHCPV6_MSG_RENEW 5
33 #define DHCPV6_MSG_REBIND 6
34 #define DHCPV6_MSG_REPLY 7
35 #define DHCPV6_MSG_RELEASE 8
36 #define DHCPV6_MSG_DECLINE 9
37 #define DHCPV6_MSG_RECONFIGURE 10
38 #define DHCPV6_MSG_INFORMATION_REQUEST 11
39 #define DHCPV6_MSG_RELAY_FORW 12
40 #define DHCPV6_MSG_RELAY_REPL 13
42 #define DHCPV6_OPT_CLIENTID 1
43 #define DHCPV6_OPT_SERVERID 2
44 #define DHCPV6_OPT_IA_NA 3
45 #define DHCPV6_OPT_IA_ADDR 5
46 #define DHCPV6_OPT_ORO 6
47 #define DHCPV6_OPT_STATUS 13
48 #define DHCPV6_OPT_RELAY_MSG 9
49 #define DHCPV6_OPT_AUTH 11
50 #define DHCPV6_OPT_USER_CLASS 15
51 #define DHCPV6_OPT_INTERFACE_ID 18
52 #define DHCPV6_OPT_RECONF_MSG 19
53 #define DHCPV6_OPT_RECONF_ACCEPT 20
54 #define DHCPV6_OPT_DNS_SERVERS 23
55 #define DHCPV6_OPT_DNS_DOMAIN 24
56 #define DHCPV6_OPT_IA_PD 25
57 #define DHCPV6_OPT_IA_PREFIX 26
58 #define DHCPV6_OPT_INFO_REFRESH 32
59 #define DHCPV6_OPT_FQDN 39
60 #define DHCPV6_OPT_SOL_MAX_RT 82
61 #define DHCPV6_OPT_INF_MAX_RT 83
63 #define DHCPV6_DUID_VENDOR 2
65 #define DHCPV6_STATUS_OK 0
66 #define DHCPV6_STATUS_NOADDRSAVAIL 2
67 #define DHCPV6_STATUS_NOBINDING 3
68 #define DHCPV6_STATUS_NOTONLINK 4
69 #define DHCPV6_STATUS_USEMULTICAST 5
70 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
72 // I just remembered I have an old one lying around...
73 #define DHCPV6_ENT_NO 30462
74 #define DHCPV6_ENT_TYPE 1
77 #define DHCPV6_HOP_COUNT_LIMIT 32
79 struct dhcpv6_client_header {
81 uint8_t transaction_id[3];
82 } __attribute__((packed));
84 struct dhcpv6_relay_header {
87 struct in6_addr link_address;
88 struct in6_addr peer_address;
90 } __attribute__((packed));
92 struct dhcpv6_relay_forward_envelope {
95 struct in6_addr link_address;
96 struct in6_addr peer_address;
97 uint16_t interface_id_type;
98 uint16_t interface_id_len;
99 uint32_t interface_id_data;
100 uint16_t relay_message_type;
101 uint16_t relay_message_len;
102 } __attribute__((packed));
104 struct dhcpv6_auth_reconfigure {
115 struct dhcpv6_ia_hdr {
123 struct dhcpv6_ia_prefix {
129 struct in6_addr addr;
132 struct dhcpv6_ia_addr {
135 struct in6_addr addr;
140 struct dhcpv6_assignment {
141 struct list_head head;
142 struct sockaddr_in6 peer;
151 uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
154 struct odhcpd_ipaddr *managed;
155 ssize_t managed_size;
156 struct ustream_fd managed_sock;
162 struct dhcpv6_cer_id {
168 struct in6_addr addr;
173 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
174 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
175 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
176 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
177 _o += 4 + (_o[2] << 8 | _o[3]))
179 int dhcpv6_init_ia(struct interface *iface, int socket);
180 ssize_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
181 const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
182 int dhcpv6_ia_init(void);
183 int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
184 void dhcpv6_write_statefile(void);
185 void dhcpv6_ia_preupdate(struct interface *iface);
186 void dhcpv6_ia_postupdate(struct interface *iface, time_t now);