Use 1 socket per interface for DHCPv6
[project/odhcpd.git] / src / dhcpv6.h
1 /**
2 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
3 *
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.
7 *
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.
12 *
13 */
14 #pragma once
15
16 #define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
17 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
18
19 #define ALL_DHCPV6_SERVERS {{{0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
20 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03}}}
21
22 #define DHCPV6_CLIENT_PORT 546
23 #define DHCPV6_SERVER_PORT 547
24
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
38
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_INTERFACE_ID 18
48 #define DHCPV6_OPT_RECONF_MSG 19
49 #define DHCPV6_OPT_RECONF_ACCEPT 20
50 #define DHCPV6_OPT_DNS_SERVERS 23
51 #define DHCPV6_OPT_DNS_DOMAIN 24
52 #define DHCPV6_OPT_IA_PD 25
53 #define DHCPV6_OPT_IA_PREFIX 26
54 #define DHCPV6_OPT_INFO_REFRESH 32
55 #define DHCPV6_OPT_FQDN 39
56
57 #ifdef EXT_PREFIX_CLASS
58 /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
59 #define DHCPV6_OPT_PREFIX_CLASS EXT_PREFIX_CLASS
60 #endif
61
62 #define DHCPV6_DUID_VENDOR 2
63
64 #define DHCPV6_STATUS_OK 0
65 #define DHCPV6_STATUS_NOADDRSAVAIL 2
66 #define DHCPV6_STATUS_NOBINDING 3
67 #define DHCPV6_STATUS_NOTONLINK 4
68 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
69
70 // I just remembered I have an old one lying around...
71 #define DHCPV6_ENT_NO 30462
72 #define DHCPV6_ENT_TYPE 1
73
74
75 #define DHCPV6_HOP_COUNT_LIMIT 32
76
77 struct dhcpv6_client_header {
78 uint8_t msg_type;
79 uint8_t transaction_id[3];
80 } __attribute__((packed));
81
82 struct dhcpv6_relay_header {
83 uint8_t msg_type;
84 uint8_t hop_count;
85 struct in6_addr link_address;
86 struct in6_addr peer_address;
87 uint8_t options[];
88 } __attribute__((packed));
89
90 struct dhcpv6_relay_forward_envelope {
91 uint8_t msg_type;
92 uint8_t hop_count;
93 struct in6_addr link_address;
94 struct in6_addr peer_address;
95 uint16_t interface_id_type;
96 uint16_t interface_id_len;
97 uint32_t interface_id_data;
98 uint16_t relay_message_type;
99 uint16_t relay_message_len;
100 } __attribute__((packed));
101
102 struct dhcpv6_auth_reconfigure {
103 uint16_t type;
104 uint16_t len;
105 uint8_t protocol;
106 uint8_t algorithm;
107 uint8_t rdm;
108 uint32_t replay[2];
109 uint8_t reconf_type;
110 uint8_t key[16];
111 } _packed;
112
113 struct dhcpv6_ia_hdr {
114 uint16_t type;
115 uint16_t len;
116 uint32_t iaid;
117 uint32_t t1;
118 uint32_t t2;
119 } _packed;
120
121 struct dhcpv6_ia_prefix {
122 uint16_t type;
123 uint16_t len;
124 uint32_t preferred;
125 uint32_t valid;
126 uint8_t prefix;
127 struct in6_addr addr;
128 } _packed;
129
130 struct dhcpv6_ia_addr {
131 uint16_t type;
132 uint16_t len;
133 struct in6_addr addr;
134 uint32_t preferred;
135 uint32_t valid;
136 } _packed;
137
138 struct dhcpv6_assignment {
139 struct list_head head;
140 struct sockaddr_in6 peer;
141 time_t valid_until;
142 time_t reconf_sent;
143 bool all_class;
144 uint8_t classes_cnt;
145 uint16_t *classes;
146 int reconf_cnt;
147 char *hostname;
148 uint8_t key[16];
149 uint32_t assigned;
150 uint32_t iaid;
151 uint8_t mac[6];
152 uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
153 bool accept_reconf;
154 uint8_t clid_len;
155 uint8_t clid_data[];
156 };
157
158
159
160 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
161 for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
162 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
163 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
164 _o += 4 + (_o[2] << 8 | _o[3]))
165
166 int dhcpv6_init_ia(struct interface *iface, int socket);
167 size_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
168 const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
169 int dhcpv6_ia_init(void);
170 int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
171 void dhcpv6_write_statefile(void);