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    1: /*
    2:  * IS-IS Rout(e)ing protocol - isis_flags.h
    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: #ifndef _ZEBRA_ISIS_FLAGS_H
   25: #define _ZEBRA_ISIS_FLAGS_H
   26: 
   27: /* The grand plan is to support 1024 circuits so we have 32*32 bit flags
   28:  * the support will be achived using the newest drafts */
   29: #define ISIS_MAX_CIRCUITS 32 /* = 1024 */
   30: 
   31: /*
   32:  * Flags structure for SSN and SRM flags
   33:  */
   34: struct flags
   35: {
   36:   int maxindex;
   37:   struct list *free_idcs;
   38: };
   39: 
   40: void flags_initialize (struct flags *flags);
   41: long int flags_get_index (struct flags *flags);
   42: void flags_free_index (struct flags *flags, long int index);
   43: int flags_any_set (u_int32_t * flags);
   44: 
   45: #define ISIS_SET_FLAG(F,C) \
   46:         { \
   47:           F[C->idx>>5] |= (1<<(C->idx & 0x1F)); \
   48:         }
   49: 
   50: #define ISIS_CLEAR_FLAG(F,C) \
   51:         { \
   52:           F[C->idx>>5] &= ~(1<<(C->idx & 0x1F)); \
   53:         }
   54: 
   55: #define ISIS_CHECK_FLAG(F, C)  (F[(C)->idx>>5] & (1<<(C->idx & 0x1F)))
   56: 
   57: /* sets all u_32int_t flags to 1 */
   58: #define ISIS_FLAGS_SET_ALL(FLAGS) \
   59:         { \
   60:           memset(FLAGS,0xFF,ISIS_MAX_CIRCUITS*4); \
   61:         }
   62: 
   63: #define ISIS_FLAGS_CLEAR_ALL(FLAGS) \
   64:         { \
   65:           memset(FLAGS,0x00,ISIS_MAX_CIRCUITS*4); \
   66:         }
   67: 
   68: #endif /* _ZEBRA_ISIS_FLAGS_H */