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Annotation of embedaddon/quagga/isisd/isis_constants.h, revision 1.1.1.1

1.1       misho       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 */