isisd/isis_constants.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_constants.h
   3  *
   4  * Copyright (C) 2001,2002   Sampo Saaristo
   5  *                           Tampere University of Technology
   6  *                           Institute of Communications Engineering
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public Licenseas published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21  */
  22
  23 #ifndef ISIS_CONSTANTS_H
  24 #define ISIS_CONSTANTS_H
  25
  26 /*
  27  * Architectural constant values from p. 35 of ISO/IEC 10589
  28  */
  29
  30 #define MAX_NARROW_LINK_METRIC        63
  31 #define MAX_NARROW_PATH_METRIC        1023
  32 #define MAX_WIDE_LINK_METRIC          0x00FFFFFF  /* RFC4444 */
  33 #define MAX_WIDE_PATH_METRIC          0xFE000000  /* RFC3787 */
  34 #define ISO_SAP                       0xFE
  35 #define INTRADOMAIN_ROUTEING_SELECTOR 0
  36 #define SEQUENCE_MODULUS              4294967296
  37
  38 /*
  39  * implementation specific jitter values
  40  */
  41
  42 #define IIH_JITTER                    10        /* % */
  43 #define MAX_AGE_JITTER                 5        /* % */
  44 #define MAX_LSP_GEN_JITTER             5        /* % */
  45 #define CSNP_JITTER                   10        /* % */
  46 #define PSNP_JITTER                   10        /* % */
  47
  48 #define RANDOM_SPREAD           100000.0
  49
  50 #define ISIS_LEVELS                   2
  51 #define ISIS_LEVEL1                   1
  52 #define ISIS_LEVEL2                   2
  53
  54 /*
  55  * Default values
  56  * ISO - 10589 Section 7.3.21 - Parameters
  57  * RFC 4444
  58  */
  59 #define MAX_AGE                       1200
  60 #define ZERO_AGE_LIFETIME             60
  61 #define MIN_LSP_LIFETIME              350
  62 #define MAX_LSP_LIFETIME              65535
  63 #define DEFAULT_LSP_LIFETIME          1200
  64
  65 #define MIN_MAX_LSP_GEN_INTERVAL      1
  66 #define MAX_MAX_LSP_GEN_INTERVAL      65235
  67 #define DEFAULT_MAX_LSP_GEN_INTERVAL  900
  68
  69 #define MIN_MIN_LSP_GEN_INTERVAL      1
  70 #define MAX_MIN_LSP_GEN_INTERVAL      120  /* RFC 4444 says 65535 */
  71 #define DEFAULT_MIN_LSP_GEN_INTERVAL  30
  72
  73 #define MIN_LSP_TRANS_INTERVAL        5
  74
  75 #define MIN_CSNP_INTERVAL             1
  76 #define MAX_CSNP_INTERVAL             600
  77 #define DEFAULT_CSNP_INTERVAL         10
  78
  79 #define MIN_PSNP_INTERVAL             1
  80 #define MAX_PSNP_INTERVAL             120
  81 #define DEFAULT_PSNP_INTERVAL         2
  82
  83 #define MIN_HELLO_INTERVAL            1
  84 #define MAX_HELLO_INTERVAL            600
  85 #define DEFAULT_HELLO_INTERVAL        3
  86
  87 #define MIN_HELLO_MULTIPLIER          2
  88 #define MAX_HELLO_MULTIPLIER          100
  89 #define DEFAULT_HELLO_MULTIPLIER      10
  90
  91 #define MIN_PRIORITY                  0
  92 #define MAX_PRIORITY                  127
  93 #define DEFAULT_PRIORITY              64
  94
  95 /* min and max metric varies by new vs old metric types */
  96 #define DEFAULT_CIRCUIT_METRIC        10
  97
  98 #define METRICS_UNSUPPORTED           0x80
  99
 100 #define MINIMUM_SPF_INTERVAL          1
 101
 102 #define ISIS_MAX_PATH_SPLITS          64
 103
 104 /*
 105  * NLPID values
 106  */
 107 #define NLPID_IP   204
 108 #define NLPID_IPV6 142
 109 #define NLPID_SNAP 128
 110 #define NLPID_CLNP 129
 111 #define NLPID_ESIS 130
 112
 113 /*
 114  * Return values for functions
 115  */
 116 #define ISIS_OK       0
 117 #define ISIS_WARNING  1
 118 #define ISIS_ERROR    2
 119 #define ISIS_CRITICAL 3
 120
 121 /*
 122  * IS-IS Circuit Types
 123  */
 124
 125 #define IS_LEVEL_1       1
 126 #define IS_LEVEL_2       2
 127 #define IS_LEVEL_1_AND_2 3
 128
 129 #define SNPA_ADDRSTRLEN 18
 130 #define ISIS_SYS_ID_LEN  6
 131 #define ISIS_NSEL_LEN    1
 132 #define SYSID_STRLEN    24
 133
 134 /*
 135  * LSP bit masks
 136  */
 137 #define LSPBIT_P   0x80
 138 #define LSPBIT_ATT 0x78
 139 #define LSPBIT_OL  0x04
 140 #define LSPBIT_IST 0x03
 141
 142 /*
 143  * LSP bit masking macros
 144  * taken from tcpdumps
 145  * print-isoclns.c
 146  */
 147
 148 #define ISIS_MASK_LSP_OL_BIT(x)            ((x)&0x4)
 149 #define ISIS_MASK_LSP_IS_L1_BIT(x)         ((x)&0x1)
 150 #define ISIS_MASK_LSP_IS_L2_BIT(x)         ((x)&0x2)
 151 #define ISIS_MASK_LSP_PARTITION_BIT(x)     ((x)&0x80)
 152 #define ISIS_MASK_LSP_ATT_BITS(x)          ((x)&0x78)
 153 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x)     ((x)&0x40)
 154 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x)   ((x)&0x20)
 155 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x)     ((x)&0x10)
 156 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x)   ((x)&0x8)
 157
 158 #define LLC_LEN 3
 159
 160 /* we need to be aware of the fact we are using ISO sized
 161  * packets, using isomtu = mtu - LLC_LEN
 162  */
 163 #define ISO_MTU(C) \
 164           ((if_is_broadcast ((C)->interface)) ? \
 165            (C->interface->mtu - LLC_LEN) : (C->interface->mtu))
 166
 167 #ifndef ETH_ALEN
 168 #define ETH_ALEN 6
 169 #endif
 170
 171 #endif /* ISIS_CONSTANTS_H */