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#define RECEIVE_LSP_BUFFER_SIZE       1492
38
39/*
40 * implementation specific jitter values
41 */
42
43#define IIH_JITTER                    10	/* % */
44#define MAX_AGE_JITTER                 5	/* % */
45#define MAX_LSP_GEN_JITTER             5	/* % */
46#define CSNP_JITTER                   10	/* % */
47#define PSNP_JITTER                   10	/* % */
48
49#define RANDOM_SPREAD           100000.0
50
51#define ISIS_LEVELS                   2
52#define ISIS_LEVEL1                   1
53#define ISIS_LEVEL2                   2
54
55/*
56 * Default values
57 * ISO - 10589 Section 7.3.21 - Parameters
58 * RFC 4444
59 */
60#define MAX_AGE                       1200
61#define ZERO_AGE_LIFETIME             60
62#define MIN_LSP_LIFETIME              350
63#define MAX_LSP_LIFETIME              65535
64#define DEFAULT_LSP_LIFETIME          1200
65
66#define MIN_MAX_LSP_GEN_INTERVAL      1
67#define MAX_MAX_LSP_GEN_INTERVAL      65235
68#define DEFAULT_MAX_LSP_GEN_INTERVAL  900
69
70#define MIN_MIN_LSP_GEN_INTERVAL      1
71#define MAX_MIN_LSP_GEN_INTERVAL      120  /* RFC 4444 says 65535 */
72#define DEFAULT_MIN_LSP_GEN_INTERVAL  30
73
74#define MIN_LSP_TRANS_INTERVAL        5
75
76#define MIN_CSNP_INTERVAL             1
77#define MAX_CSNP_INTERVAL             600
78#define DEFAULT_CSNP_INTERVAL         10
79
80#define MIN_PSNP_INTERVAL             1
81#define MAX_PSNP_INTERVAL             120
82#define DEFAULT_PSNP_INTERVAL         2
83
84#define MIN_HELLO_INTERVAL            1
85#define MAX_HELLO_INTERVAL            600
86#define DEFAULT_HELLO_INTERVAL        3
87
88#define MIN_HELLO_MULTIPLIER          2
89#define MAX_HELLO_MULTIPLIER          100
90#define DEFAULT_HELLO_MULTIPLIER      10
91
92#define MIN_PRIORITY                  0
93#define MAX_PRIORITY                  127
94#define DEFAULT_PRIORITY              64
95
96/* min and max metric varies by new vs old metric types */
97#define DEFAULT_CIRCUIT_METRIC        10
98
99#define METRICS_UNSUPPORTED           0x80
100
101#define MINIMUM_SPF_INTERVAL          1
102
103#define ISIS_MAX_PATH_SPLITS          64
104
105/*
106 * NLPID values
107 */
108#define NLPID_IP   204
109#define NLPID_IPV6 142
110#define NLPID_SNAP 128
111#define NLPID_CLNP 129
112#define NLPID_ESIS 130
113
114/*
115 * Return values for functions
116 */
117#define ISIS_OK       0
118#define ISIS_WARNING  1
119#define ISIS_ERROR    2
120#define ISIS_CRITICAL 3
121
122/*
123 * IS-IS Circuit Types
124 */
125
126#define IS_LEVEL_1       1
127#define IS_LEVEL_2       2
128#define IS_LEVEL_1_AND_2 3
129
130#define SNPA_ADDRSTRLEN 18
131#define ISIS_SYS_ID_LEN  6
132#define ISIS_NSEL_LEN    1
133#define SYSID_STRLEN    24
134
135/*
136 * LSP bit masks
137 */
138#define LSPBIT_P   0x80
139#define LSPBIT_ATT 0x78
140#define LSPBIT_OL  0x04
141#define LSPBIT_IST 0x03
142
143/*
144 * LSP bit masking macros
145 * taken from tcpdumps
146 * print-isoclns.c
147 */
148
149#define ISIS_MASK_LSP_OL_BIT(x)            ((x)&0x4)
150#define ISIS_MASK_LSP_IS_L1_BIT(x)         ((x)&0x1)
151#define ISIS_MASK_LSP_IS_L2_BIT(x)         ((x)&0x2)
152#define ISIS_MASK_LSP_PARTITION_BIT(x)     ((x)&0x80)
153#define ISIS_MASK_LSP_ATT_BITS(x)          ((x)&0x78)
154#define ISIS_MASK_LSP_ATT_ERROR_BIT(x)     ((x)&0x40)
155#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x)   ((x)&0x20)
156#define ISIS_MASK_LSP_ATT_DELAY_BIT(x)     ((x)&0x10)
157#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x)   ((x)&0x8)
158
159#define LLC_LEN 3
160
161/* we need to be aware of the fact we are using ISO sized
162 * packets, using isomtu = mtu - LLC_LEN
163 */
164#define ISO_MTU(C) \
165          ((if_is_broadcast ((C)->interface)) ? \
166           (C->interface->mtu - LLC_LEN) : (C->interface->mtu))
167
168#ifndef ETH_ALEN
169#define ETH_ALEN 6
170#endif
171
172#endif /* ISIS_CONSTANTS_H */
173