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87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* IS-IS Rout(e)ing protocol - isis_flags.c
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* Routines for manipulation of SSN and SRM flags
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*
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* Copyright (C) 2001,2002 Sampo Saaristo
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* Tampere University of Technology
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* Institute of Communications Engineering
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public Licenseas published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <zebra.h>
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#include "log.h"
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#include "linklist.h"
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#include "isisd/isis_constants.h"
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#include "isisd/isis_common.h"
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#include "isisd/isis_flags.h"
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void
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flags_initialize (struct flags *flags)
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{
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flags->maxindex = 0;
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flags->free_idcs = NULL;
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}
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long int
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flags_get_index (struct flags *flags)
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{
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struct listnode *node;
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long int index;
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if (flags->free_idcs == NULL || flags->free_idcs->count == 0)
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{
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index = flags->maxindex++;
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}
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else
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{
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node = listhead (flags->free_idcs);
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index = (long int) listgetdata (node);
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listnode_delete (flags->free_idcs, (void *) index);
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index--;
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}
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return index;
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}
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void
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flags_free_index (struct flags *flags, long int index)
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{
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if (index + 1 == flags->maxindex)
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{
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flags->maxindex--;
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return;
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}
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if (flags->free_idcs == NULL)
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{
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flags->free_idcs = list_new ();
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}
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listnode_add (flags->free_idcs, (void *) (index + 1));
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return;
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}
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int
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flags_any_set (u_int32_t * flags)
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{
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u_int32_t zero[ISIS_MAX_CIRCUITS];
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memset (zero, 0x00, ISIS_MAX_CIRCUITS * 4);
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return bcmp (flags, zero, ISIS_MAX_CIRCUITS * 4);
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}
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