]>
git.proxmox.com Git - mirror_frr.git/blob - isisd/isis_constants.h
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * IS-IS Rout(e)ing protocol - isis_constants.h
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
10 #ifndef ISIS_CONSTANTS_H
11 #define ISIS_CONSTANTS_H
14 * Architectural constant values from p. 35 of ISO/IEC 10589
17 #define MAX_NARROW_LINK_METRIC 63
18 #define MAX_NARROW_PATH_METRIC 1023
19 #define MAX_WIDE_LINK_METRIC 0x00FFFFFF /* RFC4444 */
20 #define MAX_WIDE_PATH_METRIC 0xFE000000 /* RFC3787 */
22 #define INTRADOMAIN_ROUTEING_SELECTOR 0
23 #define SEQUENCE_MODULUS 4294967296
25 #define ISO9542_ESIS 0x82
26 #define ISO10589_ISIS 0x83
29 * implementation specific jitter values
32 #define IIH_JITTER 10 /* % */
33 #define MAX_AGE_JITTER 5 /* % */
34 #define MAX_LSP_GEN_JITTER 5 /* % */
35 #define CSNP_JITTER 10 /* % */
36 #define PSNP_JITTER 10 /* % */
38 #define RANDOM_SPREAD 100000.0
46 * ISO - 10589 Section 7.3.21 - Parameters
50 #define ZERO_AGE_LIFETIME 60
51 #define MIN_LSP_LIFETIME 350
52 #define MAX_LSP_LIFETIME 65535
53 #define DEFAULT_LSP_LIFETIME 1200
55 #define MIN_MAX_LSP_GEN_INTERVAL 1
56 #define MAX_MAX_LSP_GEN_INTERVAL 65235
57 #define DEFAULT_MAX_LSP_GEN_INTERVAL 900
59 #define MIN_MIN_LSP_GEN_INTERVAL 1
60 #define MAX_MIN_LSP_GEN_INTERVAL 120 /* RFC 4444 says 65535 */
61 #define DEFAULT_MIN_LSP_GEN_INTERVAL 30
63 #define MIN_LSP_RETRANS_INTERVAL 5 /* Seconds */
65 #define TRIGGERED_IIH_DELAY 50 /* msec */
67 #define MIN_CSNP_INTERVAL 1
68 #define MAX_CSNP_INTERVAL 600
69 #define DEFAULT_CSNP_INTERVAL 10
71 #define MIN_PSNP_INTERVAL 1
72 #define MAX_PSNP_INTERVAL 120
73 #define DEFAULT_PSNP_INTERVAL 2
75 #define MIN_HELLO_INTERVAL 1
76 #define MAX_HELLO_INTERVAL 600
77 #define DEFAULT_HELLO_INTERVAL 3
79 #define MIN_HELLO_MULTIPLIER 2
80 #define MAX_HELLO_MULTIPLIER 100
81 #define DEFAULT_HELLO_MULTIPLIER 10
83 #define MIN_PRIORITY 0
84 #define MAX_PRIORITY 127
85 #define DEFAULT_PRIORITY 64
87 /* min and max metric varies by new vs old metric types */
88 #define DEFAULT_CIRCUIT_METRIC 10
90 #define METRICS_UNSUPPORTED 0x80
92 #define MINIMUM_SPF_INTERVAL 1
94 #define ISIS_MAX_PATH_SPLITS 64
100 #define NLPID_IPV6 142
101 #define NLPID_SNAP 128
102 #define NLPID_CLNP 129
103 #define NLPID_ESIS 130
106 * Return values for functions
109 #define ISIS_WARNING 1
111 #define ISIS_CRITICAL 3
114 * IS-IS Circuit Types
119 #define IS_LEVEL_1_AND_2 3
121 #define SNPA_ADDRSTRLEN 18
122 #define ISIS_SYS_ID_LEN 6
123 #define ISIS_NSEL_LEN 1
124 #define SYSID_STRLEN 24
129 #define LSPBIT_P 0x80
130 #define LSPBIT_ATT 0x08 /* only use the Default ATT bit */
131 #define LSPBIT_OL 0x04
132 #define LSPBIT_IST 0x03
135 * LSP bit masking macros
136 * taken from tcpdumps
140 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
141 #define ISIS_MASK_LSP_IS_L1_BIT(x) ((x)&0x1)
142 #define ISIS_MASK_LSP_IS_L2_BIT(x) ((x)&0x2)
143 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
144 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
145 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
146 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
147 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
151 /* we need to be aware of the fact we are using ISO sized
152 * packets, using isomtu = mtu - LLC_LEN
155 ((if_is_broadcast((C)->interface)) ? (C->interface->mtu - LLC_LEN) \
156 : (C->interface->mtu))
158 #define MAX_LLC_LEN 0x5ff
159 #define ETHERTYPE_EXT_LLC 0x8870
161 static inline uint16_t isis_ethertype(size_t len
)
163 if (len
> MAX_LLC_LEN
)
164 return ETHERTYPE_EXT_LLC
;
168 #endif /* ISIS_CONSTANTS_H */