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 #define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
17 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
19 #define ALL_DHCPV6_SERVERS {{{0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
20 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03}}}
22 #define DHCPV6_CLIENT_PORT 546
23 #define DHCPV6_SERVER_PORT 547
25 #define DHCPV6_MSG_SOLICIT 1
26 #define DHCPV6_MSG_ADVERTISE 2
27 #define DHCPV6_MSG_REQUEST 3
28 #define DHCPV6_MSG_CONFIRM 4
29 #define DHCPV6_MSG_RENEW 5
30 #define DHCPV6_MSG_REBIND 6
31 #define DHCPV6_MSG_REPLY 7
32 #define DHCPV6_MSG_RELEASE 8
33 #define DHCPV6_MSG_DECLINE 9
34 #define DHCPV6_MSG_RECONFIGURE 10
35 #define DHCPV6_MSG_INFORMATION_REQUEST 11
36 #define DHCPV6_MSG_RELAY_FORW 12
37 #define DHCPV6_MSG_RELAY_REPL 13
39 #define DHCPV6_OPT_CLIENTID 1
40 #define DHCPV6_OPT_SERVERID 2
41 #define DHCPV6_OPT_IA_NA 3
42 #define DHCPV6_OPT_IA_ADDR 5
43 #define DHCPV6_OPT_STATUS 13
44 #define DHCPV6_OPT_RELAY_MSG 9
45 #define DHCPV6_OPT_AUTH 11
46 #define DHCPV6_OPT_INTERFACE_ID 18
47 #define DHCPV6_OPT_RECONF_MSG 19
48 #define DHCPV6_OPT_RECONF_ACCEPT 20
49 #define DHCPV6_OPT_DNS_SERVERS 23
50 #define DHCPV6_OPT_DNS_DOMAIN 24
51 #define DHCPV6_OPT_IA_PD 25
52 #define DHCPV6_OPT_IA_PREFIX 26
53 #define DHCPV6_OPT_INFO_REFRESH 32
54 #define DHCPV6_OPT_FQDN 39
56 #define DHCPV6_DUID_VENDOR 2
58 #define DHCPV6_STATUS_OK 0
59 #define DHCPV6_STATUS_NOADDRSAVAIL 2
60 #define DHCPV6_STATUS_NOBINDING 3
61 #define DHCPV6_STATUS_NOTONLINK 4
62 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
64 // I just remembered I have an old one lying around...
65 #define DHCPV6_ENT_NO 30462
66 #define DHCPV6_ENT_TYPE 1
69 #define DHCPV6_HOP_COUNT_LIMIT 32
71 struct dhcpv6_client_header {
73 uint8_t transaction_id[3];
74 } __attribute__((packed));
76 struct dhcpv6_relay_header {
79 struct in6_addr link_address;
80 struct in6_addr peer_address;
82 } __attribute__((packed));
84 struct dhcpv6_relay_forward_envelope {
87 struct in6_addr link_address;
88 struct in6_addr peer_address;
89 uint16_t interface_id_type;
90 uint16_t interface_id_len;
91 uint32_t interface_id_data;
92 uint16_t relay_message_type;
93 uint16_t relay_message_len;
94 } __attribute__((packed));
96 struct dhcpv6_auth_reconfigure {
107 struct dhcpv6_ia_hdr {
115 struct dhcpv6_ia_prefix {
121 struct in6_addr addr;
124 struct dhcpv6_ia_addr {
127 struct in6_addr addr;
132 struct dhcpv6_assignment {
133 struct list_head head;
134 struct sockaddr_in6 peer;
143 uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
151 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
152 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
153 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
154 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
155 _o += 4 + (_o[2] << 8 | _o[3]))
157 int dhcpv6_init_ia(struct interface *iface, int socket);
158 size_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
159 const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
160 int dhcpv6_ia_init(int dhcpv6_socket);
161 int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
162 void dhcpv6_write_statefile(void);