release/src/router/radvd/defaults.h

   1 /*
   2  *   $Id: defaults.h,v 1.22 2010/01/28 13:34:26 psavola 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            0
  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
  60 /* Each route has an associated: */
  61 #define DFLT_AdvRouteLifetime(iface)    (3 * (iface)->MaxRtrAdvInterval)
  62
  63 #define DFLT_AdvRoutePreference         0 /* medium*/
  64
  65 /* RDNSS */
  66 #define DFLT_AdvRDNSSPreference                         8 /* medium */
  67 #define DFLT_AdvRDNSSOpenFlag                           0
  68 #define DFLT_AdvRDNSSLifetime(iface)                    (iface)->MaxRtrAdvInterval
  69
  70 /* Protocol (RFC4861) constants: */
  71
  72 /* Router constants: */
  73
  74 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
  75 #define MAX_INITIAL_RTR_ADVERTISEMENTS  3
  76 #define MAX_FINAL_RTR_ADVERTISEMENTS    3
  77 #define MIN_DELAY_BETWEEN_RAS           3.0
  78 #define MIN_DELAY_BETWEEN_RAS_MIPv6     (30.0/1000.0)
  79 #define MAX_RA_DELAY_TIME               (1000.0/2.0) /* milliseconds */
  80
  81 /* Host constants: */
  82
  83 #define MAX_RTR_SOLICITATION_DELAY      1
  84 #define RTR_SOLICITATION_INTERVAL       4
  85 #define MAX_RTR_SOLICITATIONS           3
  86
  87 /* Node constants: */
  88
  89 #define MAX_MULTICAST_SOLICIT           3
  90 #define MAX_UNICAST_SOLICIT             3
  91 #define MAX_ANYCAST_DELAY_TIME          1
  92 #define MAX_NEIGHBOR_ADVERTISEMENT      3
  93 #define REACHABLE_TIME                  30000 /* milliseconds */
  94 #define RETRANS_TIMER                   1000 /* milliseconds */
  95 #define DELAY_FIRST_PROBE_TIME          5
  96 #define MIN_RANDOM_FACTOR               (1.0/2.0)
  97 #define MAX_RANDOM_FACTOR               (3.0/2.0)
  98
  99 /* MAX and MIN (RFC4861), Mobile IPv6 extensions will override if in use */
 100
 101 #define MIN_MaxRtrAdvInterval           4
 102 #define MAX_MaxRtrAdvInterval           1800
 103
 104 #define MIN_MinRtrAdvInterval           3
 105 #define MAX_MinRtrAdvInterval(iface)    (0.75 * (iface)->MaxRtrAdvInterval)
 106
 107 #define MIN_AdvDefaultLifetime(iface)   (MAX2(1,(iface)->MaxRtrAdvInterval))
 108 #define MAX_AdvDefaultLifetime          9000
 109
 110 #define MIN_AdvLinkMTU                  1280
 111 #define MAX_AdvLinkMTU                  131072
 112
 113 #define MIN_AdvReachableTime            100
 114 #define MAX_AdvReachableTime            3600000 /* 1 hour in milliseconds */
 115
 116 #define MIN_AdvRetransTimer             10
 117 #define MAX_AdvRetransTimer             3600000
 118
 119 #define MIN_AdvCurHopLimit              2
 120 #define MAX_AdvCurHopLimit              255
 121
 122 #define MAX_PrefixLen                   128
 123
 124 /*
 125  * Mobile IPv6 extensions, off by default
 126  */
 127
 128 #define DFLT_AdvRouterAddr              0
 129 #define DFLT_AdvHomeAgentFlag           0
 130 #define DFLT_AdvIntervalOpt             0
 131 #define DFLT_AdvHomeAgentInfo           0
 132
 133 /* Option types (defined also at least in glibc 2.2's netinet/icmp6.h) */
 134
 135 #ifndef ND_OPT_RTR_ADV_INTERVAL
 136 #define ND_OPT_RTR_ADV_INTERVAL         7
 137 #endif
 138 #ifndef ND_OPT_HOME_AGENT_INFO
 139 #define ND_OPT_HOME_AGENT_INFO          8
 140 #endif
 141
 142 /* de-facto codepoint used by many implementations was '9',
 143    the official IANA assignment is '24' */
 144 #undef ND_OPT_ROUTE_INFORMATION
 145 #define  ND_OPT_ROUTE_INFORMATION       24
 146
 147 /* XXX: some libc's like KAME already had nd_opt_route_info! */
 148 struct nd_opt_route_info_local     /* route information */
 149   {
 150     uint8_t   nd_opt_ri_type;
 151     uint8_t   nd_opt_ri_len;
 152     uint8_t   nd_opt_ri_prefix_len;
 153     uint8_t   nd_opt_ri_flags_reserved;
 154     uint32_t  nd_opt_ri_lifetime;
 155     struct in6_addr  nd_opt_ri_prefix;
 156   };
 157
 158 /* the reserved field is 8 bits and we're interested of the middle two: 000xx000 */
 159 #define ND_OPT_RI_PRF_SHIFT     3
 160 #define ND_OPT_RI_PRF_MASK      (3 << ND_OPT_RI_PRF_SHIFT) /* 00011000 = 0x18 */
 161
 162 #undef ND_OPT_RDNSS_INFORMATION
 163 #define  ND_OPT_RDNSS_INFORMATION       25
 164
 165 /* */
 166 struct nd_opt_rdnss_info_local
 167 {
 168         uint8_t                         nd_opt_rdnssi_type;
 169         uint8_t                         nd_opt_rdnssi_len;
 170         uint16_t                        nd_opt_rdnssi_pref_flag_reserved;
 171         uint32_t                        nd_opt_rdnssi_lifetime;
 172         struct in6_addr         nd_opt_rdnssi_addr1;
 173         struct in6_addr         nd_opt_rdnssi_addr2;
 174         struct in6_addr         nd_opt_rdnssi_addr3;
 175 };
 176 /* pref/flag/reserved field : yyyyx00000000000 (big endian) - 00000000yyyyx000 (little indian); where yyyy = pref, x = flag */
 177 #if BYTE_ORDER == BIG_ENDIAN
 178 #define ND_OPT_RDNSSI_PREF_SHIFT        12
 179 #else
 180 #define ND_OPT_RDNSSI_PREF_SHIFT        4
 181 #endif
 182 #define ND_OPT_RDNSSI_PREF_MASK         (0xf << ND_OPT_RDNSSI_PREF_SHIFT)
 183
 184 /* Flags */
 185
 186 #ifndef ND_RA_FLAG_HOME_AGENT
 187 #define ND_RA_FLAG_HOME_AGENT           0x20
 188 #endif
 189 #ifndef ND_OPT_PI_FLAG_RADDR
 190 #define ND_OPT_PI_FLAG_RADDR            0x20
 191 #endif
 192 #ifndef ND_OPT_RDNSSI_FLAG_S
 193 #if BYTE_ORDER == BIG_ENDIAN
 194 #define ND_OPT_RDNSSI_FLAG_S         0x0800
 195 #else
 196 #define ND_OPT_RDNSSI_FLAG_S         0x0008
 197 #endif
 198 #endif
 199
 200 /* Configurable values */
 201
 202 #define DFLT_HomeAgentPreference        0
 203 #define DFLT_HomeAgentLifetime(iface)   ((iface)->AdvDefaultLifetime)
 204
 205 /* Other */
 206
 207 #define MIN_MinRtrAdvInterval_MIPv6     (3.0/100.0)
 208 #define MIN_MaxRtrAdvInterval_MIPv6     (7.0/100.0)
 209 #define RTR_SOLICITATION_INTERVAL_MIPv6 1 /* Recommended value by MIPv6 */
 210
 211 #define Cautious_MaxRtrAdvInterval      (2.0/10.0)
 212 #define Cautious_MaxRtrAdvInterval_Leeway      (2.0/100.0)
 213
 214 #define MIN_HomeAgentLifetime           1 /* 0 must NOT be used */
 215 #define MAX_HomeAgentLifetime           65520 /* 18.2 hours in secs */
 216
 217 /* #define MAX_RTR_SOLICITATIONS This MAY be ignored by MIPv6 */
 218
 219 /* NEMO extensions, off by default */
 220 #define DFLT_AdvMobRtrSupportFlag       0
 221
 222 /* Flags */
 223
 224 #ifndef ND_OPT_HAI_FLAG_SUPPORT_MR
 225 #if BYTE_ORDER == BIG_ENDIAN
 226 #define ND_OPT_HAI_FLAG_SUPPORT_MR      0x8000
 227 #else /* BYTE_ORDER == LITTLE_ENDIAN */
 228 #define ND_OPT_HAI_FLAG_SUPPORT_MR      0x0080
 229 #endif
 230 #endif
 231
 232 #endif