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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 | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
8 | * | |
d62a17ae | 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) | |
eb5d44eb | 12 | * any later version. |
13 | * | |
d62a17ae | 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 | |
eb5d44eb | 17 | * more details. |
18 | * | |
896014f4 DL |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 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 | ||
d62a17ae | 32 | void flags_initialize(struct flags *flags) |
c7350c48 | 33 | { |
d62a17ae | 34 | flags->maxindex = 0; |
35 | flags->free_idcs = NULL; | |
c7350c48 PJ |
36 | } |
37 | ||
d62a17ae | 38 | long int flags_get_index(struct flags *flags) |
eb5d44eb | 39 | { |
d62a17ae | 40 | struct listnode *node; |
41 | long int index; | |
eb5d44eb | 42 | |
d62a17ae | 43 | if (flags->free_idcs == NULL || flags->free_idcs->count == 0) { |
44 | index = flags->maxindex++; | |
45 | } else { | |
46 | node = listhead(flags->free_idcs); | |
47 | index = (long int)listgetdata(node); | |
48 | listnode_delete(flags->free_idcs, (void *)index); | |
49 | index--; | |
50 | } | |
f390d2c7 | 51 | |
d62a17ae | 52 | return index; |
eb5d44eb | 53 | } |
54 | ||
d62a17ae | 55 | void flags_free_index(struct flags *flags, long int index) |
eb5d44eb | 56 | { |
d62a17ae | 57 | if (index + 1 == flags->maxindex) { |
58 | flags->maxindex--; | |
59 | return; | |
60 | } | |
c7350c48 | 61 | |
d62a17ae | 62 | if (flags->free_idcs == NULL) { |
63 | flags->free_idcs = list_new(); | |
64 | } | |
f390d2c7 | 65 | |
d62a17ae | 66 | listnode_add(flags->free_idcs, (void *)(index + 1)); |
f390d2c7 | 67 | |
d62a17ae | 68 | return; |
eb5d44eb | 69 | } |
70 | ||
d7c0a89a | 71 | int flags_any_set(uint32_t *flags) |
eb5d44eb | 72 | { |
d7c0a89a | 73 | uint32_t zero[ISIS_MAX_CIRCUITS]; |
d62a17ae | 74 | memset(zero, 0x00, ISIS_MAX_CIRCUITS * 4); |
eb5d44eb | 75 | |
d62a17ae | 76 | return bcmp(flags, zero, ISIS_MAX_CIRCUITS * 4); |
eb5d44eb | 77 | } |