diff options
Diffstat (limited to 'isisd/isis_flags.h')
| -rw-r--r-- | isisd/isis_flags.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/isisd/isis_flags.h b/isisd/isis_flags.h new file mode 100644 index 0000000..47a1356 --- /dev/null +++ b/isisd/isis_flags.h @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + */ + +#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(uint32_t *flags); + +#define _ISIS_SET_FLAG(F, C) \ + { \ + F[(C) >> 5] |= (1 << ((C)&0x1F)); \ + } +#define ISIS_SET_FLAG(F, C) _ISIS_SET_FLAG(F, C->idx) + +#define _ISIS_CLEAR_FLAG(F, C) \ + { \ + F[(C) >> 5] &= ~(1 << ((C)&0x1F)); \ + } +#define ISIS_CLEAR_FLAG(F, C) _ISIS_CLEAR_FLAG(F, C->idx) + +#define _ISIS_CHECK_FLAG(F, C) (F[(C)>>5] & (1<<((C) & 0x1F))) +#define ISIS_CHECK_FLAG(F, C) _ISIS_CHECK_FLAG(F, C->idx) + +/* 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 */ |