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
61 #ifdef EXT_PREFIX_CLASS
62 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
63 #define DHCPV6_OPT_PREFIX_CLASS EXT_PREFIX_CLASS
66 #define DHCPV6_DUID_VENDOR 2
68 #define DHCPV6_STATUS_OK 0
69 #define DHCPV6_STATUS_NOADDRSAVAIL 2
70 #define DHCPV6_STATUS_NOBINDING 3
71 #define DHCPV6_STATUS_NOTONLINK 4
72 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
74 // I just remembered I have an old one lying around...
75 #define DHCPV6_ENT_NO 30462
76 #define DHCPV6_ENT_TYPE 1
79 #define DHCPV6_HOP_COUNT_LIMIT 32
81 struct dhcpv6_client_header {
83 uint8_t transaction_id[3];
84 } __attribute__((packed));
86 struct dhcpv6_relay_header {
89 struct in6_addr link_address;
90 struct in6_addr peer_address;
92 } __attribute__((packed));
94 struct dhcpv6_relay_forward_envelope {
97 struct in6_addr link_address;
98 struct in6_addr peer_address;
99 uint16_t interface_id_type;
100 uint16_t interface_id_len;
101 uint32_t interface_id_data;
102 uint16_t relay_message_type;
103 uint16_t relay_message_len;
104 } __attribute__((packed));
106 struct dhcpv6_auth_reconfigure {
117 struct dhcpv6_ia_hdr {
125 struct dhcpv6_ia_prefix {
131 struct in6_addr addr;
134 struct dhcpv6_ia_addr {
137 struct in6_addr addr;
142 struct dhcpv6_assignment {
143 struct list_head head;
144 struct sockaddr_in6 peer;
156 uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
159 struct odhcpd_ipaddr *managed;
160 ssize_t managed_size;
161 struct ustream_fd managed_sock;
167 struct dhcpv6_cer_id {
173 struct in6_addr addr;
178 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
179 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
180 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
181 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
182 _o += 4 + (_o[2] << 8 | _o[3]))
184 int dhcpv6_init_ia(struct interface *iface, int socket);
185 ssize_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
186 const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
187 int dhcpv6_ia_init(void);
188 int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
189 void dhcpv6_write_statefile(void);