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 #include "odhcpd.h"
  17
  18 #define ALL_DHCPV6_RELAYS "ff02::1:2"
  19
  20 #define ALL_DHCPV6_SERVERS "ff05::1:3"
  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_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
  57 #define DHCPV6_OPT_SOL_MAX_RT 82
  58 #define DHCPV6_OPT_INF_MAX_RT 83
  59
  60 #define DHCPV6_DUID_VENDOR 2
  61
  62 #define DHCPV6_STATUS_OK 0
  63 #define DHCPV6_STATUS_NOADDRSAVAIL 2
  64 #define DHCPV6_STATUS_NOBINDING 3
  65 #define DHCPV6_STATUS_NOTONLINK 4
  66 #define DHCPV6_STATUS_USEMULTICAST 5
  67 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
  68
  69 // I just remembered I have an old one lying around...
  70 #define DHCPV6_ENT_NO  30462
  71 #define DHCPV6_ENT_TYPE 1
  72
  73
  74 #define DHCPV6_HOP_COUNT_LIMIT 32
  75
  76 #define DHCPV6_REC_TIMEOUT      2000 /* msec */
  77 #define DHCPV6_REC_MAX_RC       8
  78
  79 struct dhcpv6_client_header {
  80         uint8_t msg_type;
  81         uint8_t transaction_id[3];
  82 } __attribute__((packed));
  83
  84 struct dhcpv6_relay_header {
  85         uint8_t msg_type;
  86         uint8_t hop_count;
  87         struct in6_addr link_address;
  88         struct in6_addr peer_address;
  89         uint8_t options[];
  90 } __attribute__((packed));
  91
  92 struct dhcpv6_relay_forward_envelope {
  93         uint8_t msg_type;
  94         uint8_t hop_count;
  95         struct in6_addr link_address;
  96         struct in6_addr peer_address;
  97         uint16_t interface_id_type;
  98         uint16_t interface_id_len;
  99         uint32_t interface_id_data;
 100         uint16_t relay_message_type;
 101         uint16_t relay_message_len;
 102 } __attribute__((packed));
 103
 104 struct dhcpv6_auth_reconfigure {
 105         uint16_t type;
 106         uint16_t len;
 107         uint8_t protocol;
 108         uint8_t algorithm;
 109         uint8_t rdm;
 110         uint32_t replay[2];
 111         uint8_t reconf_type;
 112         uint8_t key[16];
 113 } _packed;
 114
 115 struct dhcpv6_ia_hdr {
 116         uint16_t type;
 117         uint16_t len;
 118         uint32_t iaid;
 119         uint32_t t1;
 120         uint32_t t2;
 121 } _packed;
 122
 123 struct dhcpv6_ia_prefix {
 124         uint16_t type;
 125         uint16_t len;
 126         uint32_t preferred;
 127         uint32_t valid;
 128         uint8_t prefix;
 129         struct in6_addr addr;
 130 } _packed;
 131
 132 struct dhcpv6_ia_addr {
 133         uint16_t type;
 134         uint16_t len;
 135         struct in6_addr addr;
 136         uint32_t preferred;
 137         uint32_t valid;
 138 } _packed;
 139
 140 struct dhcpv6_cer_id {
 141         uint16_t type;
 142         uint16_t len;
 143         uint16_t reserved;
 144         uint16_t auth_type;
 145         uint8_t auth[16];
 146         struct in6_addr addr;
 147 };
 148
 149 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
 150         for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
 151                 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
 152                 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
 153                 _o += 4 + (_o[2] << 8 | _o[3]))