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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* IS-IS Rout(e)ing protocol - isis_constants.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*/
#ifndef ISIS_CONSTANTS_H
#define ISIS_CONSTANTS_H
/*
* Architectural constant values from p. 35 of ISO/IEC 10589
*/
#define MAX_NARROW_LINK_METRIC 63
#define MAX_NARROW_PATH_METRIC 1023
#define MAX_WIDE_LINK_METRIC 0x00FFFFFF /* RFC4444 */
#define MAX_WIDE_PATH_METRIC 0xFE000000 /* RFC3787 */
#define ISO_SAP 0xFE
#define INTRADOMAIN_ROUTEING_SELECTOR 0
#define SEQUENCE_MODULUS 4294967296
#define ISO9542_ESIS 0x82
#define ISO10589_ISIS 0x83
/*
* implementation specific jitter values
*/
#define IIH_JITTER 10 /* % */
#define MAX_AGE_JITTER 5 /* % */
#define MAX_LSP_GEN_JITTER 5 /* % */
#define CSNP_JITTER 10 /* % */
#define PSNP_JITTER 10 /* % */
#define RANDOM_SPREAD 100000.0
#define ISIS_LEVELS 2
#define ISIS_LEVEL1 1
#define ISIS_LEVEL2 2
/*
* Default values
* ISO - 10589 Section 7.3.21 - Parameters
* RFC 4444
*/
#define MAX_AGE 1200
#define ZERO_AGE_LIFETIME 60
#define MIN_LSP_LIFETIME 350
#define MAX_LSP_LIFETIME 65535
#define DEFAULT_LSP_LIFETIME 1200
#define MIN_MAX_LSP_GEN_INTERVAL 1
#define MAX_MAX_LSP_GEN_INTERVAL 65235
#define DEFAULT_MAX_LSP_GEN_INTERVAL 900
#define MIN_MIN_LSP_GEN_INTERVAL 1
#define MAX_MIN_LSP_GEN_INTERVAL 120 /* RFC 4444 says 65535 */
#define DEFAULT_MIN_LSP_GEN_INTERVAL 30
#define MIN_LSP_RETRANS_INTERVAL 5 /* Seconds */
#define TRIGGERED_IIH_DELAY 50 /* msec */
#define MIN_CSNP_INTERVAL 1
#define MAX_CSNP_INTERVAL 600
#define DEFAULT_CSNP_INTERVAL 10
#define MIN_PSNP_INTERVAL 1
#define MAX_PSNP_INTERVAL 120
#define DEFAULT_PSNP_INTERVAL 2
#define MIN_HELLO_INTERVAL 1
#define MAX_HELLO_INTERVAL 600
#define DEFAULT_HELLO_INTERVAL 3
#define MIN_HELLO_MULTIPLIER 2
#define MAX_HELLO_MULTIPLIER 100
#define DEFAULT_HELLO_MULTIPLIER 10
#define MIN_PRIORITY 0
#define MAX_PRIORITY 127
#define DEFAULT_PRIORITY 64
/* min and max metric varies by new vs old metric types */
#define DEFAULT_CIRCUIT_METRIC 10
#define METRICS_UNSUPPORTED 0x80
#define MINIMUM_SPF_INTERVAL 1
#define ISIS_MAX_PATH_SPLITS 64
/*
* NLPID values
*/
#define NLPID_IP 204
#define NLPID_IPV6 142
#define NLPID_SNAP 128
#define NLPID_CLNP 129
#define NLPID_ESIS 130
/*
* 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 ISIS_NSEL_LEN 1
#define SYSID_STRLEN 24
/*
* LSP bit masks
*/
#define LSPBIT_P 0x80
#define LSPBIT_ATT 0x08 /* only use the Default ATT bit */
#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 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) \
((if_is_broadcast((C)->interface)) ? (C->interface->mtu - LLC_LEN) \
: (C->interface->mtu))
#define MAX_LLC_LEN 0x5ff
#define ETHERTYPE_EXT_LLC 0x8870
static inline uint16_t isis_ethertype(size_t len)
{
if (len > MAX_LLC_LEN)
return ETHERTYPE_EXT_LLC;
return len;
}
#endif /* ISIS_CONSTANTS_H */
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