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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_flags.c | |
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 | ||
eb5d44eb | 24 | #include <zebra.h> |
25 | #include "log.h" | |
26 | #include "linklist.h" | |
27 | ||
28 | #include "isisd/isis_constants.h" | |
29 | #include "isisd/isis_common.h" | |
30 | #include "isisd/isis_flags.h" | |
31 | ||
c7350c48 PJ |
32 | void |
33 | flags_initialize (struct flags *flags) | |
34 | { | |
35 | flags->maxindex = 0; | |
36 | flags->free_idcs = NULL; | |
37 | } | |
38 | ||
3f045a08 | 39 | long int |
f390d2c7 | 40 | flags_get_index (struct flags *flags) |
eb5d44eb | 41 | { |
42 | struct listnode *node; | |
3f045a08 | 43 | long int index; |
eb5d44eb | 44 | |
f390d2c7 | 45 | if (flags->free_idcs == NULL || flags->free_idcs->count == 0) |
46 | { | |
c7350c48 | 47 | index = flags->maxindex++; |
f390d2c7 | 48 | } |
49 | else | |
50 | { | |
51 | node = listhead (flags->free_idcs); | |
3f045a08 | 52 | index = (long int) listgetdata (node); |
f390d2c7 | 53 | listnode_delete (flags->free_idcs, (void *) index); |
c7350c48 | 54 | index--; |
f390d2c7 | 55 | } |
56 | ||
eb5d44eb | 57 | return index; |
58 | } | |
59 | ||
f390d2c7 | 60 | void |
3f045a08 | 61 | flags_free_index (struct flags *flags, long int index) |
eb5d44eb | 62 | { |
c7350c48 PJ |
63 | if (index + 1 == flags->maxindex) |
64 | { | |
65 | flags->maxindex--; | |
66 | return; | |
67 | } | |
68 | ||
f390d2c7 | 69 | if (flags->free_idcs == NULL) |
70 | { | |
71 | flags->free_idcs = list_new (); | |
72 | } | |
73 | ||
c7350c48 | 74 | listnode_add (flags->free_idcs, (void *) (index + 1)); |
f390d2c7 | 75 | |
eb5d44eb | 76 | return; |
77 | } | |
78 | ||
f390d2c7 | 79 | int |
80 | flags_any_set (u_int32_t * flags) | |
eb5d44eb | 81 | { |
f390d2c7 | 82 | u_int32_t zero[ISIS_MAX_CIRCUITS]; |
83 | memset (zero, 0x00, ISIS_MAX_CIRCUITS * 4); | |
eb5d44eb | 84 | |
f390d2c7 | 85 | return bcmp (flags, zero, ISIS_MAX_CIRCUITS * 4); |
eb5d44eb | 86 | } |