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Diffstat (limited to 'isisd/isis_constants.h')
| -rw-r--r-- | isisd/isis_constants.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/isisd/isis_constants.h b/isisd/isis_constants.h new file mode 100644 index 0000000..b2be282 --- /dev/null +++ b/isisd/isis_constants.h @@ -0,0 +1,168 @@ +// 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 */ |