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_ORO 6
44 #define DHCPV6_OPT_STATUS 13
45 #define DHCPV6_OPT_RELAY_MSG 9
46 #define DHCPV6_OPT_AUTH 11
47 #define DHCPV6_OPT_USER_CLASS 15
48 #define DHCPV6_OPT_INTERFACE_ID 18
49 #define DHCPV6_OPT_RECONF_MSG 19
50 #define DHCPV6_OPT_RECONF_ACCEPT 20
51 #define DHCPV6_OPT_DNS_SERVERS 23
52 #define DHCPV6_OPT_DNS_DOMAIN 24
53 #define DHCPV6_OPT_IA_PD 25
54 #define DHCPV6_OPT_IA_PREFIX 26
55 #define DHCPV6_OPT_INFO_REFRESH 32
56 #define DHCPV6_OPT_FQDN 39
58 #ifdef EXT_PREFIX_CLASS
59 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
60 #define DHCPV6_OPT_PREFIX_CLASS EXT_PREFIX_CLASS
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_NOPREFIXAVAIL 6
71 // I just remembered I have an old one lying around...
72 #define DHCPV6_ENT_NO 30462
73 #define DHCPV6_ENT_TYPE 1
76 #define DHCPV6_HOP_COUNT_LIMIT 32
78 struct dhcpv6_client_header
{
80 uint8_t transaction_id
[3];
81 } __attribute__((packed
));
83 struct dhcpv6_relay_header
{
86 struct in6_addr link_address
;
87 struct in6_addr peer_address
;
89 } __attribute__((packed
));
91 struct dhcpv6_relay_forward_envelope
{
94 struct in6_addr link_address
;
95 struct in6_addr peer_address
;
96 uint16_t interface_id_type
;
97 uint16_t interface_id_len
;
98 uint32_t interface_id_data
;
99 uint16_t relay_message_type
;
100 uint16_t relay_message_len
;
101 } __attribute__((packed
));
103 struct dhcpv6_auth_reconfigure
{
114 struct dhcpv6_ia_hdr
{
122 struct dhcpv6_ia_prefix
{
128 struct in6_addr addr
;
131 struct dhcpv6_ia_addr
{
134 struct in6_addr addr
;
139 struct dhcpv6_assignment
{
140 struct list_head head
;
141 struct sockaddr_in6 peer
;
153 uint8_t length
; // length == 128 -> IA_NA, length <= 64 -> IA_PD
161 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
162 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
163 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
164 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
165 _o += 4 + (_o[2] << 8 | _o[3]))
167 int dhcpv6_init_ia(struct interface
*iface
, int socket
);
168 size_t dhcpv6_handle_ia(uint8_t *buf
, size_t buflen
, struct interface
*iface
,
169 const struct sockaddr_in6
*addr
, const void *data
, const uint8_t *end
);
170 int dhcpv6_ia_init(void);
171 int setup_dhcpv6_ia_interface(struct interface
*iface
, bool enable
);
172 void dhcpv6_write_statefile(void);