1/*
2 * IS-IS Rout(e)ing protocol - isis_flags.h
3 *                             Routines for manipulation of SSN and SRM flags
4 *
5 * Copyright (C) 2001,2002   Sampo Saaristo
6 *                           Tampere University of Technology
7 *                           Institute of Communications Engineering
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public Licenseas published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
17 * more details.
18
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22 */
23
24#ifndef _ZEBRA_ISIS_FLAGS_H
25#define _ZEBRA_ISIS_FLAGS_H
26
27/* The grand plan is to support 1024 circuits so we have 32*32 bit flags
28 * the support will be achived using the newest drafts */
29#define ISIS_MAX_CIRCUITS 32 /* = 1024 */
30
31/*
32 * Flags structure for SSN and SRM flags
33 */
34struct flags
35{
36  int maxindex;
37  struct list *free_idcs;
38};
39
40void flags_initialize (struct flags *flags);
41long int flags_get_index (struct flags *flags);
42void flags_free_index (struct flags *flags, long int index);
43int flags_any_set (u_int32_t * flags);
44
45#define ISIS_SET_FLAG(F,C) \
46        { \
47          F[C->idx>>5] |= (1<<(C->idx & 0x1F)); \
48        }
49
50#define ISIS_CLEAR_FLAG(F,C) \
51        { \
52          F[C->idx>>5] &= ~(1<<(C->idx & 0x1F)); \
53        }
54
55#define ISIS_CHECK_FLAG(F, C)  (F[(C)->idx>>5] & (1<<(C->idx & 0x1F)))
56
57/* sets all u_32int_t flags to 1 */
58#define ISIS_FLAGS_SET_ALL(FLAGS) \
59        { \
60          memset(FLAGS,0xFF,ISIS_MAX_CIRCUITS*4); \
61        }
62
63#define ISIS_FLAGS_CLEAR_ALL(FLAGS) \
64        { \
65          memset(FLAGS,0x00,ISIS_MAX_CIRCUITS*4); \
66        }
67
68#endif /* _ZEBRA_ISIS_FLAGS_H */
69