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; see the file COPYING; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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         int maxindex;
  36         struct list *free_idcs;
  37 };
  38
  39 void flags_initialize(struct flags *flags);
  40 long int flags_get_index(struct flags *flags);
  41 void flags_free_index(struct flags *flags, long int index);
  42 int flags_any_set(uint32_t *flags);
  43
  44 #define _ISIS_SET_FLAG(F, C)                                                   \
  45         {                                                                      \
  46                 F[(C) >> 5] |= (1 << ((C)&0x1F));                              \
  47         }
  48 #define ISIS_SET_FLAG(F, C) _ISIS_SET_FLAG(F, C->idx)
  49
  50 #define _ISIS_CLEAR_FLAG(F, C)                                                 \
  51         {                                                                      \
  52                 F[(C) >> 5] &= ~(1 << ((C)&0x1F));                             \
  53         }
  54 #define ISIS_CLEAR_FLAG(F, C) _ISIS_CLEAR_FLAG(F, C->idx)
  55
  56 #define _ISIS_CHECK_FLAG(F, C)  (F[(C)>>5] & (1<<((C) & 0x1F)))
  57 #define ISIS_CHECK_FLAG(F, C) _ISIS_CHECK_FLAG(F, C->idx)
  58
  59 /* sets all u_32int_t flags to 1 */
  60 #define ISIS_FLAGS_SET_ALL(FLAGS)                                              \
  61         {                                                                      \
  62                 memset(FLAGS, 0xFF, ISIS_MAX_CIRCUITS * 4);                    \
  63         }
  64
  65 #define ISIS_FLAGS_CLEAR_ALL(FLAGS)                                            \
  66         {                                                                      \
  67                 memset(FLAGS, 0x00, ISIS_MAX_CIRCUITS * 4);                    \
  68         }
  69
  70 #endif /* _ZEBRA_ISIS_FLAGS_H */