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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
eb5d44eb | 2 | /* |
d62a17ae | 3 | * IS-IS Rout(e)ing protocol - isis_constants.h |
eb5d44eb | 4 | * |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
eb5d44eb | 8 | */ |
9 | ||
10 | #ifndef ISIS_CONSTANTS_H | |
11 | #define ISIS_CONSTANTS_H | |
12 | ||
13 | /* | |
14 | * Architectural constant values from p. 35 of ISO/IEC 10589 | |
f390d2c7 | 15 | */ |
eb5d44eb | 16 | |
3f045a08 JB |
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 */ | |
eb5d44eb | 21 | #define ISO_SAP 0xFE |
22 | #define INTRADOMAIN_ROUTEING_SELECTOR 0 | |
23 | #define SEQUENCE_MODULUS 4294967296 | |
eb5d44eb | 24 | |
3c3877cd DL |
25 | #define ISO9542_ESIS 0x82 |
26 | #define ISO10589_ISIS 0x83 | |
27 | ||
eb5d44eb | 28 | /* |
29 | * implementation specific jitter values | |
30 | */ | |
31 | ||
3f045a08 | 32 | #define IIH_JITTER 10 /* % */ |
f390d2c7 | 33 | #define MAX_AGE_JITTER 5 /* % */ |
34 | #define MAX_LSP_GEN_JITTER 5 /* % */ | |
35 | #define CSNP_JITTER 10 /* % */ | |
36 | #define PSNP_JITTER 10 /* % */ | |
eb5d44eb | 37 | |
38 | #define RANDOM_SPREAD 100000.0 | |
39 | ||
3f045a08 JB |
40 | #define ISIS_LEVELS 2 |
41 | #define ISIS_LEVEL1 1 | |
42 | #define ISIS_LEVEL2 2 | |
43 | ||
eb5d44eb | 44 | /* |
45 | * Default values | |
3f045a08 JB |
46 | * ISO - 10589 Section 7.3.21 - Parameters |
47 | * RFC 4444 | |
eb5d44eb | 48 | */ |
49 | #define MAX_AGE 1200 | |
50 | #define ZERO_AGE_LIFETIME 60 | |
3f045a08 JB |
51 | #define MIN_LSP_LIFETIME 350 |
52 | #define MAX_LSP_LIFETIME 65535 | |
53 | #define DEFAULT_LSP_LIFETIME 1200 | |
54 | ||
55 | #define MIN_MAX_LSP_GEN_INTERVAL 1 | |
56 | #define MAX_MAX_LSP_GEN_INTERVAL 65235 | |
57 | #define DEFAULT_MAX_LSP_GEN_INTERVAL 900 | |
58 | ||
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 | |
62 | ||
e5973ce5 | 63 | #define MIN_LSP_RETRANS_INTERVAL 5 /* Seconds */ |
eb5d44eb | 64 | |
a0a707ee CF |
65 | #define TRIGGERED_IIH_DELAY 50 /* msec */ |
66 | ||
3f045a08 JB |
67 | #define MIN_CSNP_INTERVAL 1 |
68 | #define MAX_CSNP_INTERVAL 600 | |
69 | #define DEFAULT_CSNP_INTERVAL 10 | |
70 | ||
71 | #define MIN_PSNP_INTERVAL 1 | |
72 | #define MAX_PSNP_INTERVAL 120 | |
73 | #define DEFAULT_PSNP_INTERVAL 2 | |
74 | ||
75 | #define MIN_HELLO_INTERVAL 1 | |
76 | #define MAX_HELLO_INTERVAL 600 | |
77 | #define DEFAULT_HELLO_INTERVAL 3 | |
78 | ||
79 | #define MIN_HELLO_MULTIPLIER 2 | |
80 | #define MAX_HELLO_MULTIPLIER 100 | |
81 | #define DEFAULT_HELLO_MULTIPLIER 10 | |
eb5d44eb | 82 | |
3f045a08 JB |
83 | #define MIN_PRIORITY 0 |
84 | #define MAX_PRIORITY 127 | |
eb5d44eb | 85 | #define DEFAULT_PRIORITY 64 |
3f045a08 JB |
86 | |
87 | /* min and max metric varies by new vs old metric types */ | |
88 | #define DEFAULT_CIRCUIT_METRIC 10 | |
89 | ||
90 | #define METRICS_UNSUPPORTED 0x80 | |
91 | ||
92 | #define MINIMUM_SPF_INTERVAL 1 | |
93 | ||
94 | #define ISIS_MAX_PATH_SPLITS 64 | |
eb5d44eb | 95 | |
96 | /* | |
97 | * NLPID values | |
98 | */ | |
99 | #define NLPID_IP 204 | |
100 | #define NLPID_IPV6 142 | |
2097cd8a | 101 | #define NLPID_SNAP 128 |
102 | #define NLPID_CLNP 129 | |
103 | #define NLPID_ESIS 130 | |
eb5d44eb | 104 | |
105 | /* | |
106 | * Return values for functions | |
107 | */ | |
108 | #define ISIS_OK 0 | |
109 | #define ISIS_WARNING 1 | |
110 | #define ISIS_ERROR 2 | |
111 | #define ISIS_CRITICAL 3 | |
112 | ||
113 | /* | |
114 | * IS-IS Circuit Types | |
115 | */ | |
116 | ||
117 | #define IS_LEVEL_1 1 | |
118 | #define IS_LEVEL_2 2 | |
119 | #define IS_LEVEL_1_AND_2 3 | |
120 | ||
121 | #define SNPA_ADDRSTRLEN 18 | |
122 | #define ISIS_SYS_ID_LEN 6 | |
3f045a08 | 123 | #define ISIS_NSEL_LEN 1 |
eb5d44eb | 124 | #define SYSID_STRLEN 24 |
125 | ||
126 | /* | |
127 | * LSP bit masks | |
128 | */ | |
129 | #define LSPBIT_P 0x80 | |
f3abc412 | 130 | #define LSPBIT_ATT 0x08 /* only use the Default ATT bit */ |
eb5d44eb | 131 | #define LSPBIT_OL 0x04 |
132 | #define LSPBIT_IST 0x03 | |
133 | ||
134 | /* | |
135 | * LSP bit masking macros | |
136 | * taken from tcpdumps | |
137 | * print-isoclns.c | |
138 | */ | |
139 | ||
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) | |
eb5d44eb | 148 | |
149 | #define LLC_LEN 3 | |
150 | ||
151 | /* we need to be aware of the fact we are using ISO sized | |
152 | * packets, using isomtu = mtu - LLC_LEN | |
153 | */ | |
d62a17ae | 154 | #define ISO_MTU(C) \ |
155 | ((if_is_broadcast((C)->interface)) ? (C->interface->mtu - LLC_LEN) \ | |
156 | : (C->interface->mtu)) | |
eb5d44eb | 157 | |
316a98ec CF |
158 | #define MAX_LLC_LEN 0x5ff |
159 | #define ETHERTYPE_EXT_LLC 0x8870 | |
160 | ||
161 | static inline uint16_t isis_ethertype(size_t len) | |
162 | { | |
d62a17ae | 163 | if (len > MAX_LLC_LEN) |
164 | return ETHERTYPE_EXT_LLC; | |
165 | return len; | |
316a98ec CF |
166 | } |
167 | ||
f390d2c7 | 168 | #endif /* ISIS_CONSTANTS_H */ |