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/*
 * IS-IS Rout(e)ing protocol - isis_flags.h
 *                             Routines for manipulation of SSN and SRM flags
 *
 * Copyright (C) 2001,2002   Sampo Saaristo
 *                           Tampere University of Technology      
 *                           Institute of Communications Engineering
 *
 * This program is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU General Public Licenseas published by the Free 
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
 * more details.

 * You should have received a copy of the GNU General Public License along 
 * with this program; if not, write to the Free Software Foundation, Inc., 
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef _ZEBRA_ISIS_FLAGS_H
#define _ZEBRA_ISIS_FLAGS_H

/* The grand plan is to support 1024 circuits so we have 32*32 bit flags
 * the support will be achived using the newest drafts */
#define ISIS_MAX_CIRCUITS 32 /* = 1024 */

/*
 * Flags structure for SSN and SRM flags
 */
struct flags
{
  int maxindex;
  struct list *free_idcs;
};

void flags_initialize (struct flags *flags);
long int flags_get_index (struct flags *flags);
void flags_free_index (struct flags *flags, long int index);
int flags_any_set (u_int32_t * flags);

#define ISIS_SET_FLAG(F,C) \
        { \
          F[C->idx>>5] |= (1<<(C->idx & 0x1F)); \
        }

#define ISIS_CLEAR_FLAG(F,C) \
        { \
          F[C->idx>>5] &= ~(1<<(C->idx & 0x1F)); \
        }

#define ISIS_CHECK_FLAG(F, C)  (F[(C)->idx>>5] & (1<<(C->idx & 0x1F)))

/* sets all u_32int_t flags to 1 */
#define ISIS_FLAGS_SET_ALL(FLAGS) \
        { \
          memset(FLAGS,0xFF,ISIS_MAX_CIRCUITS*4); \
        }

#define ISIS_FLAGS_CLEAR_ALL(FLAGS) \
        { \
          memset(FLAGS,0x00,ISIS_MAX_CIRCUITS*4); \
        }

#endif /* _ZEBRA_ISIS_FLAGS_H */