release/src/router/radvd/defaults.h

   1 /*
   2  *   $Id: defaults.h,v 1.31 2011/05/04 18:03:57 reubenhwk Exp $
   3  *
   4  *   Authors:
   5  *    Lars Fenneberg            <lf@elemental.net>
   6  *
   7  *   This software is Copyright 1996,1997 by the above mentioned author(s),
   8  *   All Rights Reserved.
   9  *
  10  *   The license which is distributed with this software in the file COPYRIGHT
  11  *   applies to this software. If your distribution is missing this file, you
  12  *   may request it from <pekkas@netcore.fi>.
  13  *
  14  */
  15
  16 #ifndef DEFAULTS_H
  17 #define DEFAULTS_H
  18
  19 #include "config.h"
  20 #include "includes.h"
  21 #include "radvd.h"
  22
  23 /* maximum message size for incoming and outgoing RSs and RAs */
  24 #define MSG_SIZE_RECV                   1500
  25 #define MSG_SIZE_SEND                   1452
  26
  27 #define MAX2(X,Y) ( (( X ) >=  ( Y )) ? ( X ) : ( Y ))
  28
  29
  30 /* Router Configuration Variables: */
  31
  32 /* For each multicast interface: */
  33
  34 #define DFLT_IgnoreIfMissing            1
  35 #define DFLT_AdvSendAdv                 0
  36 #define DFLT_MaxRtrAdvInterval          600
  37 #define DFLT_MinRtrAdvInterval(iface)   (0.33 * (iface)->MaxRtrAdvInterval)
  38 #define DFLT_AdvManagedFlag             0
  39 #define DFLT_AdvOtherConfigFlag         0
  40 #define DFLT_AdvLinkMTU                 0
  41 #define DFLT_AdvReachableTime           0
  42 #define DFLT_AdvRetransTimer            0
  43 #define DFLT_AdvCurHopLimit             64      /* as per RFC 1700 or the
  44                                                    next incarnation of it :) */
  45 #define DFLT_AdvDefaultLifetime(iface)  MAX2(1, (int)(3.0 * (iface)->MaxRtrAdvInterval))
  46 #define DFLT_MinDelayBetweenRAs         MIN_DELAY_BETWEEN_RAS
  47 #define DFLT_AdvDefaultPreference       0
  48
  49 /* Options sent with RA */
  50
  51 #define DFLT_AdvSourceLLAddress         1
  52
  53 /* Each prefix has an associated: */
  54
  55 #define DFLT_AdvValidLifetime           86400 /* seconds */
  56 #define DFLT_AdvOnLinkFlag              1
  57 #define DFLT_AdvPreferredLifetime       14400 /* seconds */
  58 #define DFLT_AdvAutonomousFlag          1
  59 #define DFLT_DeprecatePrefixFlag        0
  60 #define DFLT_DecrementLifetimesFlag     0
  61
  62 /* Each route has an associated: */
  63 #define DFLT_AdvRouteLifetime(iface)    (3 * (iface)->MaxRtrAdvInterval)
  64
  65 #define DFLT_AdvRoutePreference         0 /* medium*/
  66 #define DFLT_RemoveRouteFlag            1
  67
  68 /* RDNSS */
  69 #define DFLT_AdvRDNSSLifetime(iface)                    (iface)->MaxRtrAdvInterval
  70 #define DFLT_FlushRDNSSFlag             1
  71
  72 /* DNSSL */
  73 #define DFLT_AdvDNSSLLifetime(iface)                    (iface)->MaxRtrAdvInterval
  74 #define DFLT_FlushDNSSLFlag             1
  75
  76 /* Protocol (RFC4861) constants: */
  77
  78 /* Router constants: */
  79
  80 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
  81 #define MAX_INITIAL_RTR_ADVERTISEMENTS  3
  82 #define MAX_FINAL_RTR_ADVERTISEMENTS    3
  83 #define MIN_DELAY_BETWEEN_RAS           3.0
  84 #define MIN_DELAY_BETWEEN_RAS_MIPv6     (30.0/1000.0)
  85 #define MAX_RA_DELAY_TIME               (1000.0/2.0) /* milliseconds */
  86
  87 /* Host constants: */
  88
  89 #define MAX_RTR_SOLICITATION_DELAY      1
  90 #define RTR_SOLICITATION_INTERVAL       4
  91 #define MAX_RTR_SOLICITATIONS           3
  92
  93 /* Node constants: */
  94
  95 #define MAX_MULTICAST_SOLICIT           3
  96 #define MAX_UNICAST_SOLICIT             3
  97 #define MAX_ANYCAST_DELAY_TIME          1
  98 #define MAX_NEIGHBOR_ADVERTISEMENT      3
  99 #define REACHABLE_TIME                  30000 /* milliseconds */
 100 #define RETRANS_TIMER                   1000 /* milliseconds */
 101 #define DELAY_FIRST_PROBE_TIME          5
 102 #define MIN_RANDOM_FACTOR               (1.0/2.0)
 103 #define MAX_RANDOM_FACTOR               (3.0/2.0)
 104
 105 /* MAX and MIN (RFC4861), Mobile IPv6 extensions will override if in use */
 106
 107 #define MIN_MaxRtrAdvInterval           4
 108 #define MAX_MaxRtrAdvInterval           1800
 109
 110 #define MIN_MinRtrAdvInterval           3
 111 #define MAX_MinRtrAdvInterval(iface)    (0.75 * (iface)->MaxRtrAdvInterval)
 112
 113 #define MIN_AdvDefaultLifetime(iface)   (MAX2(1,(iface)->MaxRtrAdvInterval))
 114 #define MAX_AdvDefaultLifetime          9000
 115
 116 #define MIN_AdvLinkMTU                  1280
 117 #define MAX_AdvLinkMTU                  131072
 118
 119 #define MIN_AdvReachableTime            100
 120 #define MAX_AdvReachableTime            3600000 /* 1 hour in milliseconds */
 121
 122 #define MIN_AdvRetransTimer             10
 123 #define MAX_AdvRetransTimer             3600000
 124
 125 #define MIN_AdvCurHopLimit              2
 126 #define MAX_AdvCurHopLimit              255
 127
 128 #define MAX_PrefixLen                   128
 129
 130 /* SLAAC (RFC4862) Constants and Derived Values */
 131 #define MIN_AdvValidLifetime            7203    /* slight >2 hours in secs */
 132
 133 /*
 134  * Mobile IPv6 extensions, off by default
 135  */
 136
 137 #define DFLT_AdvRouterAddr              0
 138 #define DFLT_AdvHomeAgentFlag           0
 139 #define DFLT_AdvIntervalOpt             0
 140 #define DFLT_AdvHomeAgentInfo           0
 141
 142 /* Option types (defined also at least in glibc 2.2's netinet/icmp6.h) */
 143
 144 #ifndef ND_OPT_RTR_ADV_INTERVAL
 145 #define ND_OPT_RTR_ADV_INTERVAL         7
 146 #endif
 147 #ifndef ND_OPT_HOME_AGENT_INFO
 148 #define ND_OPT_HOME_AGENT_INFO          8
 149 #endif
 150
 151 /* de-facto codepoint used by many implementations was '9',
 152    the official IANA assignment is '24' */
 153 #undef ND_OPT_ROUTE_INFORMATION
 154 #define  ND_OPT_ROUTE_INFORMATION       24
 155
 156 /* XXX: some libc's like KAME already had nd_opt_route_info! */
 157 struct nd_opt_route_info_local     /* route information */
 158   {
 159     uint8_t   nd_opt_ri_type;
 160     uint8_t   nd_opt_ri_len;
 161     uint8_t   nd_opt_ri_prefix_len;
 162     uint8_t   nd_opt_ri_flags_reserved;
 163     uint32_t  nd_opt_ri_lifetime;
 164     struct in6_addr  nd_opt_ri_prefix;
 165   };
 166
 167 /* the reserved field is 8 bits and we're interested of the middle two: 000xx000 */
 168 #define ND_OPT_RI_PRF_SHIFT     3
 169 #define ND_OPT_RI_PRF_MASK      (3 << ND_OPT_RI_PRF_SHIFT) /* 00011000 = 0x18 */
 170
 171 #undef ND_OPT_RDNSS_INFORMATION
 172 #define  ND_OPT_RDNSS_INFORMATION       25
 173
 174 /* */
 175 struct nd_opt_rdnss_info_local
 176 {
 177         uint8_t                         nd_opt_rdnssi_type;
 178         uint8_t                         nd_opt_rdnssi_len;
 179         uint16_t                        nd_opt_rdnssi_pref_flag_reserved;
 180         uint32_t                        nd_opt_rdnssi_lifetime;
 181         struct in6_addr         nd_opt_rdnssi_addr1;
 182         struct in6_addr         nd_opt_rdnssi_addr2;
 183         struct in6_addr         nd_opt_rdnssi_addr3;
 184 };
 185 /* pref/flag/reserved field : yyyyx00000000000 (big endian) - 00000000yyyyx000 (little indian); where yyyy = pref, x = flag */
 186 #if BYTE_ORDER == BIG_ENDIAN
 187 #define ND_OPT_RDNSSI_PREF_SHIFT        12
 188 #else
 189 #define ND_OPT_RDNSSI_PREF_SHIFT        4
 190 #endif
 191 #define ND_OPT_RDNSSI_PREF_MASK         (0xf << ND_OPT_RDNSSI_PREF_SHIFT)
 192
 193 #undef ND_OPT_DNSSL_INFORMATION
 194 #define  ND_OPT_DNSSL_INFORMATION       31
 195
 196 /* */
 197 struct nd_opt_dnssl_info_local
 198 {
 199         uint8_t                         nd_opt_dnssli_type;
 200         uint8_t                         nd_opt_dnssli_len;
 201         uint16_t                        nd_opt_dnssli_reserved;
 202         uint32_t                        nd_opt_dnssli_lifetime;
 203         char                            nd_opt_dnssli_suffixes[];
 204 };
 205
 206 /* Flags */
 207
 208 #ifndef ND_RA_FLAG_HOME_AGENT
 209 #define ND_RA_FLAG_HOME_AGENT           0x20
 210 #endif
 211 #ifndef ND_OPT_PI_FLAG_RADDR
 212 #define ND_OPT_PI_FLAG_RADDR            0x20
 213 #endif
 214 #ifndef ND_OPT_RDNSSI_FLAG_S
 215 #if BYTE_ORDER == BIG_ENDIAN
 216 #define ND_OPT_RDNSSI_FLAG_S         0x0800
 217 #else
 218 #define ND_OPT_RDNSSI_FLAG_S         0x0008
 219 #endif
 220 #endif
 221
 222 /* Configurable values */
 223
 224 #define DFLT_HomeAgentPreference        0
 225 #define DFLT_HomeAgentLifetime(iface)   ((iface)->AdvDefaultLifetime)
 226
 227 /* Other */
 228
 229 #define MIN_MinRtrAdvInterval_MIPv6     (3.0/100.0)
 230 #define MIN_MaxRtrAdvInterval_MIPv6     (7.0/100.0)
 231 #define RTR_SOLICITATION_INTERVAL_MIPv6 1 /* Recommended value by MIPv6 */
 232
 233 #define Cautious_MaxRtrAdvInterval      (2.0/10.0)
 234 #define Cautious_MaxRtrAdvInterval_Leeway      (2.0/100.0)
 235
 236 #define MIN_HomeAgentLifetime           1 /* 0 must NOT be used */
 237 #define MAX_HomeAgentLifetime           65520 /* 18.2 hours in secs */
 238
 239 /* #define MAX_RTR_SOLICITATIONS This MAY be ignored by MIPv6 */
 240
 241 /* NEMO extensions, off by default */
 242 #define DFLT_AdvMobRtrSupportFlag       0
 243
 244 /* Flags */
 245
 246 #ifndef ND_OPT_HAI_FLAG_SUPPORT_MR
 247 #if BYTE_ORDER == BIG_ENDIAN
 248 #define ND_OPT_HAI_FLAG_SUPPORT_MR      0x8000
 249 #else /* BYTE_ORDER == LITTLE_ENDIAN */
 250 #define ND_OPT_HAI_FLAG_SUPPORT_MR      0x0080
 251 #endif
 252 #endif
 253
 254 #endif