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 #define RECEIVE_LSP_BUFFER_SIZE       1492
  38
  39 /*
  40  * implementation specific jitter values
  41  */
  42
  43 #define IIH_JITTER                    10        /* % */
  44 #define MAX_AGE_JITTER                 5        /* % */
  45 #define MAX_LSP_GEN_JITTER             5        /* % */
  46 #define CSNP_JITTER                   10        /* % */
  47 #define PSNP_JITTER                   10        /* % */
  48
  49 #define RANDOM_SPREAD           100000.0
  50
  51 #define ISIS_LEVELS                   2
  52 #define ISIS_LEVEL1                   1
  53 #define ISIS_LEVEL2                   2
  54
  55 /*
  56  * Default values
  57  * ISO - 10589 Section 7.3.21 - Parameters
  58  * RFC 4444
  59  */
  60 #define MAX_AGE                       1200
  61 #define ZERO_AGE_LIFETIME             60
  62 #define MIN_LSP_LIFETIME              350
  63 #define MAX_LSP_LIFETIME              65535
  64 #define DEFAULT_LSP_LIFETIME          1200
  65
  66 #define MIN_MAX_LSP_GEN_INTERVAL      1
  67 #define MAX_MAX_LSP_GEN_INTERVAL      65235
  68 #define DEFAULT_MAX_LSP_GEN_INTERVAL  900
  69
  70 #define MIN_MIN_LSP_GEN_INTERVAL      1
  71 #define MAX_MIN_LSP_GEN_INTERVAL      120  /* RFC 4444 says 65535 */
  72 #define DEFAULT_MIN_LSP_GEN_INTERVAL  30
  73
  74 #define MIN_LSP_TRANS_INTERVAL        5
  75
  76 #define MIN_CSNP_INTERVAL             1
  77 #define MAX_CSNP_INTERVAL             600
  78 #define DEFAULT_CSNP_INTERVAL         10
  79
  80 #define MIN_PSNP_INTERVAL             1
  81 #define MAX_PSNP_INTERVAL             120
  82 #define DEFAULT_PSNP_INTERVAL         2
  83
  84 #define MIN_HELLO_INTERVAL            1
  85 #define MAX_HELLO_INTERVAL            600
  86 #define DEFAULT_HELLO_INTERVAL        3
  87
  88 #define MIN_HELLO_MULTIPLIER          2
  89 #define MAX_HELLO_MULTIPLIER          100
  90 #define DEFAULT_HELLO_MULTIPLIER      10
  91
  92 #define MIN_PRIORITY                  0
  93 #define MAX_PRIORITY                  127
  94 #define DEFAULT_PRIORITY              64
  95
  96 /* min and max metric varies by new vs old metric types */
  97 #define DEFAULT_CIRCUIT_METRIC        10
  98
  99 #define METRICS_UNSUPPORTED           0x80
 100
 101 #define MINIMUM_SPF_INTERVAL          1
 102
 103 #define ISIS_MAX_PATH_SPLITS          64
 104
 105 /*
 106  * NLPID values
 107  */
 108 #define NLPID_IP   204
 109 #define NLPID_IPV6 142
 110 #define NLPID_SNAP 128
 111 #define NLPID_CLNP 129
 112 #define NLPID_ESIS 130
 113
 114 /*
 115  * Return values for functions
 116  */
 117 #define ISIS_OK       0
 118 #define ISIS_WARNING  1
 119 #define ISIS_ERROR    2
 120 #define ISIS_CRITICAL 3
 121
 122 /*
 123  * IS-IS Circuit Types
 124  */
 125
 126 #define IS_LEVEL_1       1
 127 #define IS_LEVEL_2       2
 128 #define IS_LEVEL_1_AND_2 3
 129
 130 #define SNPA_ADDRSTRLEN 18
 131 #define ISIS_SYS_ID_LEN  6
 132 #define ISIS_NSEL_LEN    1
 133 #define SYSID_STRLEN    24
 134
 135 /*
 136  * LSP bit masks
 137  */
 138 #define LSPBIT_P   0x80
 139 #define LSPBIT_ATT 0x78
 140 #define LSPBIT_OL  0x04
 141 #define LSPBIT_IST 0x03
 142
 143 /*
 144  * LSP bit masking macros
 145  * taken from tcpdumps
 146  * print-isoclns.c
 147  */
 148
 149 #define ISIS_MASK_LSP_OL_BIT(x)            ((x)&0x4)
 150 #define ISIS_MASK_LSP_IS_L1_BIT(x)         ((x)&0x1)
 151 #define ISIS_MASK_LSP_IS_L2_BIT(x)         ((x)&0x2)
 152 #define ISIS_MASK_LSP_PARTITION_BIT(x)     ((x)&0x80)
 153 #define ISIS_MASK_LSP_ATT_BITS(x)          ((x)&0x78)
 154 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x)     ((x)&0x40)
 155 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x)   ((x)&0x20)
 156 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x)     ((x)&0x10)
 157 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x)   ((x)&0x8)
 158
 159 #define LLC_LEN 3
 160
 161 /* we need to be aware of the fact we are using ISO sized
 162  * packets, using isomtu = mtu - LLC_LEN
 163  */
 164 #define ISO_MTU(C) \
 165           ((if_is_broadcast ((C)->interface)) ? \
 166            (C->interface->mtu - LLC_LEN) : (C->interface->mtu))
 167
 168 #ifndef ETH_ALEN
 169 #define ETH_ALEN 6
 170 #endif
 171
 172 #endif /* ISIS_CONSTANTS_H */