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_LINK_METRIC               63
  31 #define MAX_PATH_METRIC               1023
  32 #define ISO_SAP                       0xFE
  33 #define INTRADOMAIN_ROUTEING_SELECTOR 0
  34 #define SEQUENCE_MODULUS              4294967296
  35 #define RECEIVE_LSP_BUFFER_SIZE       1492
  36
  37 /*
  38  * implementation specific jitter values
  39  */
  40
  41 #define IIH_JITTER                    25        /* % */
  42 #define MAX_AGE_JITTER                 5        /* % */
  43 #define MAX_LSP_GEN_JITTER             5        /* % */
  44 #define CSNP_JITTER                   10        /* % */
  45 #define PSNP_JITTER                   10        /* % */
  46
  47 #define RANDOM_SPREAD           100000.0
  48
  49 /*
  50  * Default values
  51  * ISO - 10589
  52  * Section 7.3.21 - Parameters
  53  */
  54 #define MAX_AGE                       1200
  55 #define ZERO_AGE_LIFETIME             60
  56 #define MAX_LSP_GEN_INTERVAL          900
  57 #define MIN_LSP_GEN_INTERVAL          30
  58 #define MIN_LSP_TRANS_INTERVAL        5
  59 #define ISIS_MIN_LSP_LIFETIME         380
  60 #define CSNP_INTERVAL                 10
  61 #define PSNP_INTERVAL                 2
  62 #define ISIS_MAX_PATH_SPLITS          3
  63
  64 #define ISIS_LEVELS                   2
  65 #define ISIS_LEVEL1                   1
  66 #define ISIS_LEVEL2                   2
  67
  68 #define HELLO_INTERVAL                10
  69 #define HELLO_MINIMAL HELLO_INTERVAL
  70 #define HELLO_MULTIPLIER              3
  71 #define DEFAULT_PRIORITY              64
  72 /* different vendors implement different values 5-10 on average */
  73 #define LSP_GEN_INTERVAL_DEFAULT      10
  74 #define LSP_INTERVAL                  33        /* msecs */
  75 #define DEFAULT_CIRCUIT_METRICS 10
  76 #define METRICS_UNSUPPORTED 0x80
  77 #define PERIODIC_SPF_INTERVAL         60        /* at the top of my head */
  78 #define MINIMUM_SPF_INTERVAL           5        /* .. same here          */
  79
  80 /*
  81  * NLPID values
  82  */
  83 #define NLPID_IP   204
  84 #define NLPID_IPV6 142
  85 #define NLPID_SNAP 128
  86 #define NLPID_CLNP 129
  87 #define NLPID_ESIS 130
  88
  89 /*
  90  * Return values for functions
  91  */
  92 #define ISIS_OK       0
  93 #define ISIS_WARNING  1
  94 #define ISIS_ERROR    2
  95 #define ISIS_CRITICAL 3
  96
  97 /*
  98  * IS-IS Circuit Types
  99  */
 100
 101 #define IS_LEVEL_1       1
 102 #define IS_LEVEL_2       2
 103 #define IS_LEVEL_1_AND_2 3
 104
 105 #define SNPA_ADDRSTRLEN 18
 106 #define ISIS_SYS_ID_LEN  6
 107 #define SYSID_STRLEN    24
 108
 109 /*
 110  * LSP bit masks
 111  */
 112 #define LSPBIT_P   0x80
 113 #define LSPBIT_ATT 0x78
 114 #define LSPBIT_OL  0x04
 115 #define LSPBIT_IST 0x03
 116
 117 /*
 118  * LSP bit masking macros
 119  * taken from tcpdumps
 120  * print-isoclns.c
 121  */
 122
 123 #define ISIS_MASK_LSP_OL_BIT(x)            ((x)&0x4)
 124 #define ISIS_MASK_LSP_IS_L1_BIT(x)         ((x)&0x1)
 125 #define ISIS_MASK_LSP_IS_L2_BIT(x)         ((x)&0x2)
 126 #define ISIS_MASK_LSP_PARTITION_BIT(x)     ((x)&0x80)
 127 #define ISIS_MASK_LSP_ATT_BITS(x)          ((x)&0x78)
 128 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x)     ((x)&0x40)
 129 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x)   ((x)&0x20)
 130 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x)     ((x)&0x10)
 131 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x)   ((x)&0x8)
 132
 133 #define LLC_LEN 3
 134
 135 /* we need to be aware of the fact we are using ISO sized
 136  * packets, using isomtu = mtu - LLC_LEN
 137  */
 138 #define ISO_MTU(C) \
 139           (C->circ_type==CIRCUIT_T_BROADCAST) ? \
 140           (C->interface->mtu - LLC_LEN) : (C->interface->mtu)
 141
 142 #ifndef ETH_ALEN
 143 #define ETH_ALEN 6
 144 #endif
 145
 146 #endif /* ISIS_CONSTANTS_H */