Return to isis_flags.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / quagga / isisd

Annotation of embedaddon/quagga/isisd/isis_flags.c, revision 1.1.1.2

1.1       misho       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: 
                     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: 
                     32: void
                     33: flags_initialize (struct flags *flags)
                     34: {
                     35:   flags->maxindex = 0;
                     36:   flags->free_idcs = NULL;
                     37: }
                     38: 
1.1.1.2 ! misho      39: long int
1.1       misho      40: flags_get_index (struct flags *flags)
                     41: {
                     42:   struct listnode *node;
1.1.1.2 ! misho      43:   long int index;
1.1       misho      44: 
                     45:   if (flags->free_idcs == NULL || flags->free_idcs->count == 0)
                     46:     {
                     47:       index = flags->maxindex++;
                     48:     }
                     49:   else
                     50:     {
                     51:       node = listhead (flags->free_idcs);
1.1.1.2 ! misho      52:       index = (long int) listgetdata (node);
1.1       misho      53:       listnode_delete (flags->free_idcs, (void *) index);
                     54:       index--;
                     55:     }
                     56: 
                     57:   return index;
                     58: }
                     59: 
                     60: void
1.1.1.2 ! misho      61: flags_free_index (struct flags *flags, long int index)
1.1       misho      62: {
                     63:   if (index + 1 == flags->maxindex)
                     64:     {
                     65:       flags->maxindex--;
                     66:       return;
                     67:     }
                     68: 
                     69:   if (flags->free_idcs == NULL)
                     70:     {
                     71:       flags->free_idcs = list_new ();
                     72:     }
                     73: 
                     74:   listnode_add (flags->free_idcs, (void *) (index + 1));
                     75: 
                     76:   return;
                     77: }
                     78: 
                     79: int
                     80: flags_any_set (u_int32_t * flags)
                     81: {
                     82:   u_int32_t zero[ISIS_MAX_CIRCUITS];
                     83:   memset (zero, 0x00, ISIS_MAX_CIRCUITS * 4);
                     84: 
                     85:   return bcmp (flags, zero, ISIS_MAX_CIRCUITS * 4);
                     86: }