1: /*
2: * IS-IS Rout(e)ing protocol - isis_constants.h
3: *
4: * Copyright (C) 2001,2002 Sampo Saaristo
5: * Tampere University of Technology
6: * Institute of Communications Engineering
7: *
8: * This program is free software; you can redistribute it and/or modify it
9: * under the terms of the GNU General Public Licenseas published by the Free
10: * Software Foundation; either version 2 of the License, or (at your option)
11: * any later version.
12: *
13: * This program is distributed in the hope that it will be useful,but WITHOUT
14: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16: * more details.
17:
18: * You should have received a copy of the GNU General Public License along
19: * with this program; if not, write to the Free Software Foundation, Inc.,
20: * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21: */
22:
23: #ifndef ISIS_CONSTANTS_H
24: #define ISIS_CONSTANTS_H
25:
26: /*
27: * Architectural constant values from p. 35 of ISO/IEC 10589
28: */
29:
30: #define MAX_NARROW_LINK_METRIC 63
31: #define MAX_NARROW_PATH_METRIC 1023
32: #define MAX_WIDE_LINK_METRIC 0x00FFFFFF /* RFC4444 */
33: #define MAX_WIDE_PATH_METRIC 0xFE000000 /* RFC3787 */
34: #define ISO_SAP 0xFE
35: #define INTRADOMAIN_ROUTEING_SELECTOR 0
36: #define SEQUENCE_MODULUS 4294967296
37:
38: /*
39: * implementation specific jitter values
40: */
41:
42: #define IIH_JITTER 10 /* % */
43: #define MAX_AGE_JITTER 5 /* % */
44: #define MAX_LSP_GEN_JITTER 5 /* % */
45: #define CSNP_JITTER 10 /* % */
46: #define PSNP_JITTER 10 /* % */
47:
48: #define RANDOM_SPREAD 100000.0
49:
50: #define ISIS_LEVELS 2
51: #define ISIS_LEVEL1 1
52: #define ISIS_LEVEL2 2
53:
54: /*
55: * Default values
56: * ISO - 10589 Section 7.3.21 - Parameters
57: * RFC 4444
58: */
59: #define MAX_AGE 1200
60: #define ZERO_AGE_LIFETIME 60
61: #define MIN_LSP_LIFETIME 350
62: #define MAX_LSP_LIFETIME 65535
63: #define DEFAULT_LSP_LIFETIME 1200
64:
65: #define MIN_MAX_LSP_GEN_INTERVAL 1
66: #define MAX_MAX_LSP_GEN_INTERVAL 65235
67: #define DEFAULT_MAX_LSP_GEN_INTERVAL 900
68:
69: #define MIN_MIN_LSP_GEN_INTERVAL 1
70: #define MAX_MIN_LSP_GEN_INTERVAL 120 /* RFC 4444 says 65535 */
71: #define DEFAULT_MIN_LSP_GEN_INTERVAL 30
72:
73: #define MIN_LSP_TRANS_INTERVAL 5
74:
75: #define MIN_CSNP_INTERVAL 1
76: #define MAX_CSNP_INTERVAL 600
77: #define DEFAULT_CSNP_INTERVAL 10
78:
79: #define MIN_PSNP_INTERVAL 1
80: #define MAX_PSNP_INTERVAL 120
81: #define DEFAULT_PSNP_INTERVAL 2
82:
83: #define MIN_HELLO_INTERVAL 1
84: #define MAX_HELLO_INTERVAL 600
85: #define DEFAULT_HELLO_INTERVAL 3
86:
87: #define MIN_HELLO_MULTIPLIER 2
88: #define MAX_HELLO_MULTIPLIER 100
89: #define DEFAULT_HELLO_MULTIPLIER 10
90:
91: #define MIN_PRIORITY 0
92: #define MAX_PRIORITY 127
93: #define DEFAULT_PRIORITY 64
94:
95: /* min and max metric varies by new vs old metric types */
96: #define DEFAULT_CIRCUIT_METRIC 10
97:
98: #define METRICS_UNSUPPORTED 0x80
99:
100: #define MINIMUM_SPF_INTERVAL 1
101:
102: #define ISIS_MAX_PATH_SPLITS 64
103:
104: /*
105: * NLPID values
106: */
107: #define NLPID_IP 204
108: #define NLPID_IPV6 142
109: #define NLPID_SNAP 128
110: #define NLPID_CLNP 129
111: #define NLPID_ESIS 130
112:
113: /*
114: * Return values for functions
115: */
116: #define ISIS_OK 0
117: #define ISIS_WARNING 1
118: #define ISIS_ERROR 2
119: #define ISIS_CRITICAL 3
120:
121: /*
122: * IS-IS Circuit Types
123: */
124:
125: #define IS_LEVEL_1 1
126: #define IS_LEVEL_2 2
127: #define IS_LEVEL_1_AND_2 3
128:
129: #define SNPA_ADDRSTRLEN 18
130: #define ISIS_SYS_ID_LEN 6
131: #define ISIS_NSEL_LEN 1
132: #define SYSID_STRLEN 24
133:
134: /*
135: * LSP bit masks
136: */
137: #define LSPBIT_P 0x80
138: #define LSPBIT_ATT 0x78
139: #define LSPBIT_OL 0x04
140: #define LSPBIT_IST 0x03
141:
142: /*
143: * LSP bit masking macros
144: * taken from tcpdumps
145: * print-isoclns.c
146: */
147:
148: #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
149: #define ISIS_MASK_LSP_IS_L1_BIT(x) ((x)&0x1)
150: #define ISIS_MASK_LSP_IS_L2_BIT(x) ((x)&0x2)
151: #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
152: #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
153: #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
154: #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
155: #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
156: #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
157:
158: #define LLC_LEN 3
159:
160: /* we need to be aware of the fact we are using ISO sized
161: * packets, using isomtu = mtu - LLC_LEN
162: */
163: #define ISO_MTU(C) \
164: ((if_is_broadcast ((C)->interface)) ? \
165: (C->interface->mtu - LLC_LEN) : (C->interface->mtu))
166:
167: #ifndef ETH_ALEN
168: #define ETH_ALEN 6
169: #endif
170:
171: #endif /* ISIS_CONSTANTS_H */
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