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/*
* IS-IS Rout(e)ing protocol - isis_constants.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef ISIS_CONSTANTS_H
#define ISIS_CONSTANTS_H
/*
* Architectural constant values from p. 35 of ISO/IEC 10589
*/
#define MAX_LINK_METRIC 63
#define MAX_PATH_METRIC 1023
#define ISO_SAP 0xFE
#define INTRADOMAIN_ROUTEING_SELECTOR 0
#define SEQUENCE_MODULUS 4294967296
#define RECEIVE_LSP_BUFFER_SIZE 1492
/*
* implementation specific jitter values
*/
#define IIH_JITTER 25 /* % */
#define MAX_AGE_JITTER 5 /* % */
#define MAX_LSP_GEN_JITTER 5 /* % */
#define CSNP_JITTER 10 /* % */
#define PSNP_JITTER 10 /* % */
#define RANDOM_SPREAD 100000.0
/*
* Default values
* ISO - 10589
* Section 7.3.21 - Parameters
*/
#define MAX_AGE 1200
#define ZERO_AGE_LIFETIME 60
#define MAX_LSP_GEN_INTERVAL 900
#define MIN_LSP_GEN_INTERVAL 30
#define MIN_LSP_TRANS_INTERVAL 5
#define ISIS_MIN_LSP_LIFETIME 380
#define CSNP_INTERVAL 10
#define PSNP_INTERVAL 2
#define ISIS_MAX_PATH_SPLITS 3
#define ISIS_LEVELS 2
#define ISIS_LEVEL1 1
#define ISIS_LEVEL2 2
#define HELLO_INTERVAL 1
#define HELLO_MINIMAL HELLO_INTERVAL
#define HELLO_MULTIPLIER 3
#define DEFAULT_PRIORITY 64
/* different vendors implement different values 5-10 on average */
#define LSP_GEN_INTERVAL_DEFAULT 10
#define LSP_INTERVAL 33 /* msecs */
#define DEFAULT_CIRCUIT_METRICS 10
#define METRICS_UNSUPPORTED 0x80
#define PERIODIC_SPF_INTERVAL 60 /* at the top of my head */
#define MINIMUM_SPF_INTERVAL 5 /* .. same here */
/*
* NLPID values
*/
#define NLPID_IP 204
#define NLPID_IPV6 142
/*
* Return values for functions
*/
#define ISIS_OK 0
#define ISIS_WARNING 1
#define ISIS_ERROR 2
#define ISIS_CRITICAL 3
/*
* IS-IS Circuit Types
*/
#define IS_LEVEL_1 1
#define IS_LEVEL_2 2
#define IS_LEVEL_1_AND_2 3
#define SNPA_ADDRSTRLEN 18
#define ISIS_SYS_ID_LEN 6
#define SYSID_STRLEN 24
/*
* LSP bit masks
*/
#define LSPBIT_P 0x80
#define LSPBIT_ATT 0x78
#define LSPBIT_OL 0x04
#define LSPBIT_IST 0x03
/*
* LSP bit masking macros
* taken from tcpdumps
* print-isoclns.c
*/
#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
#define ISIS_MASK_LSP_IS_L1_BIT(x) ((x)&0x1)
#define ISIS_MASK_LSP_IS_L2_BIT(x) ((x)&0x2)
#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
#define LLC_LEN 3
/* we need to be aware of the fact we are using ISO sized
* packets, using isomtu = mtu - LLC_LEN
*/
#define ISO_MTU(C) \
(C->circ_type==CIRCUIT_T_BROADCAST) ? \
(C->interface->mtu - LLC_LEN) : (C->interface->mtu)
#ifndef ETH_ALEN
#define ETH_ALEN 6
#endif
#endif /* ISIS_CONSTANTS_H */
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