isisd/isis_flags.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * IS-IS Rout(e)ing protocol - isis_flags.h
   4  *                             Routines for manipulation of SSN and SRM flags
   5  *
   6  * Copyright (C) 2001,2002   Sampo Saaristo
   7  *                           Tampere University of Technology
   8  *                           Institute of Communications Engineering
   9  */
  10
  11 #ifndef _ZEBRA_ISIS_FLAGS_H
  12 #define _ZEBRA_ISIS_FLAGS_H
  13
  14 /* The grand plan is to support 1024 circuits so we have 32*32 bit flags
  15  * the support will be achived using the newest drafts */
  16 #define ISIS_MAX_CIRCUITS 32 /* = 1024 */
  17
  18 /*
  19  * Flags structure for SSN and SRM flags
  20  */
  21 struct flags {
  22         int maxindex;
  23         struct list *free_idcs;
  24 };
  25
  26 void flags_initialize(struct flags *flags);
  27 long int flags_get_index(struct flags *flags);
  28 void flags_free_index(struct flags *flags, long int index);
  29 int flags_any_set(uint32_t *flags);
  30
  31 #define _ISIS_SET_FLAG(F, C)                                                   \
  32         {                                                                      \
  33                 F[(C) >> 5] |= (1 << ((C)&0x1F));                              \
  34         }
  35 #define ISIS_SET_FLAG(F, C) _ISIS_SET_FLAG(F, C->idx)
  36
  37 #define _ISIS_CLEAR_FLAG(F, C)                                                 \
  38         {                                                                      \
  39                 F[(C) >> 5] &= ~(1 << ((C)&0x1F));                             \
  40         }
  41 #define ISIS_CLEAR_FLAG(F, C) _ISIS_CLEAR_FLAG(F, C->idx)
  42
  43 #define _ISIS_CHECK_FLAG(F, C)  (F[(C)>>5] & (1<<((C) & 0x1F)))
  44 #define ISIS_CHECK_FLAG(F, C) _ISIS_CHECK_FLAG(F, C->idx)
  45
  46 /* sets all u_32int_t flags to 1 */
  47 #define ISIS_FLAGS_SET_ALL(FLAGS)                                              \
  48         {                                                                      \
  49                 memset(FLAGS, 0xFF, ISIS_MAX_CIRCUITS * 4);                    \
  50         }
  51
  52 #define ISIS_FLAGS_CLEAR_ALL(FLAGS)                                            \
  53         {                                                                      \
  54                 memset(FLAGS, 0x00, ISIS_MAX_CIRCUITS * 4);                    \
  55         }
  56
  57 #endif /* _ZEBRA_ISIS_FLAGS_H */