release/src/router/radvd/defaults.h

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