isisd/isis_flags.h

   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 */