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 #define DHCPV6_MSG_DHCPV4_QUERY 20
  39 #define DHCPV6_MSG_DHCPV4_RESPONSE 21
  40
  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_RAPID_COMMIT 14
  50 #define DHCPV6_OPT_USER_CLASS 15
  51 #define DHCPV6_OPT_INTERFACE_ID 18
  52 #define DHCPV6_OPT_RECONF_MSG 19
  53 #define DHCPV6_OPT_RECONF_ACCEPT 20
  54 #define DHCPV6_OPT_DNS_SERVERS 23
  55 #define DHCPV6_OPT_DNS_DOMAIN 24
  56 #define DHCPV6_OPT_IA_PD 25
  57 #define DHCPV6_OPT_IA_PREFIX 26
  58 #define DHCPV6_OPT_INFO_REFRESH 32
  59 #define DHCPV6_OPT_FQDN 39
  60 #define DHCPV6_OPT_SOL_MAX_RT 82
  61 #define DHCPV6_OPT_INF_MAX_RT 83
  62 #define DHCPV6_OPT_DHCPV4_MSG 87
  63 #define DHCPV6_OPT_4O6_SERVER 88
  64
  65 #define DHCPV6_DUID_VENDOR 2
  66
  67 #define DHCPV6_STATUS_OK 0
  68 #define DHCPV6_STATUS_NOADDRSAVAIL 2
  69 #define DHCPV6_STATUS_NOBINDING 3
  70 #define DHCPV6_STATUS_NOTONLINK 4
  71 #define DHCPV6_STATUS_USEMULTICAST 5
  72 #define DHCPV6_STATUS_NOPREFIXAVAIL 6
  73
  74 // I just remembered I have an old one lying around...
  75 #define DHCPV6_ENT_NO  30462
  76 #define DHCPV6_ENT_TYPE 1
  77
  78
  79 #define DHCPV6_HOP_COUNT_LIMIT 32
  80
  81 #define DHCPV6_REC_TIMEOUT      2000 /* msec */
  82 #define DHCPV6_REC_MAX_RC       8
  83
  84 struct dhcpv6_client_header {
  85         uint8_t msg_type;
  86         uint8_t transaction_id[3];
  87 } __attribute__((packed));
  88
  89 struct dhcpv6_relay_header {
  90         uint8_t msg_type;
  91         uint8_t hop_count;
  92         struct in6_addr link_address;
  93         struct in6_addr peer_address;
  94         uint8_t options[];
  95 } __attribute__((packed));
  96
  97 struct dhcpv6_relay_forward_envelope {
  98         uint8_t msg_type;
  99         uint8_t hop_count;
 100         struct in6_addr link_address;
 101         struct in6_addr peer_address;
 102         uint16_t interface_id_type;
 103         uint16_t interface_id_len;
 104         uint32_t interface_id_data;
 105         uint16_t relay_message_type;
 106         uint16_t relay_message_len;
 107 } __attribute__((packed));
 108
 109 struct dhcpv6_auth_reconfigure {
 110         uint16_t type;
 111         uint16_t len;
 112         uint8_t protocol;
 113         uint8_t algorithm;
 114         uint8_t rdm;
 115         uint32_t replay[2];
 116         uint8_t reconf_type;
 117         uint8_t key[16];
 118 } _packed;
 119
 120 struct dhcpv6_ia_hdr {
 121         uint16_t type;
 122         uint16_t len;
 123         uint32_t iaid;
 124         uint32_t t1;
 125         uint32_t t2;
 126 } _packed;
 127
 128 struct dhcpv6_ia_prefix {
 129         uint16_t type;
 130         uint16_t len;
 131         uint32_t preferred;
 132         uint32_t valid;
 133         uint8_t prefix;
 134         struct in6_addr addr;
 135 } _packed;
 136
 137 struct dhcpv6_ia_addr {
 138         uint16_t type;
 139         uint16_t len;
 140         struct in6_addr addr;
 141         uint32_t preferred;
 142         uint32_t valid;
 143 } _packed;
 144
 145 struct dhcpv6_cer_id {
 146         uint16_t type;
 147         uint16_t len;
 148         uint16_t reserved;
 149         uint16_t auth_type;
 150         uint8_t auth[16];
 151         struct in6_addr addr;
 152 };
 153
 154 #define dhcpv6_for_each_option(start, end, otype, olen, odata)\
 155         for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
 156                 ((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
 157                 ((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
 158                 _o += 4 + (_o[2] << 8 | _o[3]))