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>
18 #define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
19 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
21 #define ALL_DHCPV6_SERVERS {{{0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
22 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03}}}
24 #define DHCPV6_CLIENT_PORT 546
25 #define DHCPV6_SERVER_PORT 547
27 #define DHCPV6_MSG_SOLICIT 1
28 #define DHCPV6_MSG_ADVERTISE 2
29 #define DHCPV6_MSG_REQUEST 3
30 #define DHCPV6_MSG_CONFIRM 4
31 #define DHCPV6_MSG_RENEW 5
32 #define DHCPV6_MSG_REBIND 6
33 #define DHCPV6_MSG_REPLY 7
34 #define DHCPV6_MSG_RELEASE 8
35 #define DHCPV6_MSG_DECLINE 9
36 #define DHCPV6_MSG_RECONFIGURE 10
37 #define DHCPV6_MSG_INFORMATION_REQUEST 11
38 #define DHCPV6_MSG_RELAY_FORW 12
39 #define DHCPV6_MSG_RELAY_REPL 13
41 #define DHCPV6_OPT_CLIENTID 1
42 #define DHCPV6_OPT_SERVERID 2
43 #define DHCPV6_OPT_IA_NA 3
44 #define DHCPV6_OPT_IA_ADDR 5
45 #define DHCPV6_OPT_ORO 6
46 #define DHCPV6_OPT_STATUS 13
47 #define DHCPV6_OPT_RELAY_MSG 9
48 #define DHCPV6_OPT_AUTH 11
49 #define DHCPV6_OPT_USER_CLASS 15
50 #define DHCPV6_OPT_INTERFACE_ID 18
51 #define DHCPV6_OPT_RECONF_MSG 19
52 #define DHCPV6_OPT_RECONF_ACCEPT 20
53 #define DHCPV6_OPT_DNS_SERVERS 23
54 #define DHCPV6_OPT_DNS_DOMAIN 24
55 #define DHCPV6_OPT_IA_PD 25
56 #define DHCPV6_OPT_IA_PREFIX 26
57 #define DHCPV6_OPT_INFO_REFRESH 32
58 #define DHCPV6_OPT_FQDN 39
59 #define DHCPV6_OPT_SOL_MAX_RT 82
60 #define DHCPV6_OPT_INF_MAX_RT 83
62 #ifdef EXT_PREFIX_CLASS
63 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
64 #define DHCPV6_OPT_PREFIX_CLASS EXT_PREFIX_CLASS
67 #define DHCPV6_DUID_VENDOR 2
69 #define DHCPV6_STATUS_OK 0
70 #define DHCPV6_STATUS_NOADDRSAVAIL 2
71 #define DHCPV6_STATUS_NOBINDING 3
72 #define DHCPV6_STATUS_NOTONLINK 4
73 #define DHCPV6_STATUS_USEMULTICAST 5
74 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
76 // I just remembered I have an old one lying around...
77 #define DHCPV6_ENT_NO 30462
78 #define DHCPV6_ENT_TYPE 1
81 #define DHCPV6_HOP_COUNT_LIMIT 32
83 struct dhcpv6_client_header {
85 uint8_t transaction_id[3];
86 } __attribute__((packed));
88 struct dhcpv6_relay_header {
91 struct in6_addr link_address;
92 struct in6_addr peer_address;
94 } __attribute__((packed));
96 struct dhcpv6_relay_forward_envelope {
99 struct in6_addr link_address;
100 struct in6_addr peer_address;
101 uint16_t interface_id_type;
102 uint16_t interface_id_len;
103 uint32_t interface_id_data;
104 uint16_t relay_message_type;
105 uint16_t relay_message_len;
106 } __attribute__((packed));
108 struct dhcpv6_auth_reconfigure {
119 struct dhcpv6_ia_hdr {
127 struct dhcpv6_ia_prefix {
133 struct in6_addr addr;
136 struct dhcpv6_ia_addr {
139 struct in6_addr addr;
144 struct dhcpv6_assignment {
145 struct list_head head;
146 struct sockaddr_in6 peer;
158 uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
161 struct odhcpd_ipaddr *managed;
162 ssize_t managed_size;
163 struct ustream_fd managed_sock;
169 struct dhcpv6_cer_id {
175 struct in6_addr addr;
180 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
181 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
182 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
183 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
184 _o += 4 + (_o[2] << 8 | _o[3]))
186 int dhcpv6_init_ia(struct interface *iface, int socket);
187 ssize_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
188 const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
189 int dhcpv6_ia_init(void);
190 int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
191 void dhcpv6_write_statefile(void);