65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* IS-IS Rout(e)ing protocol - isis_flags.c
|
||
|
|
* Routines for manipulation of SSN and SRM flags
|
||
|
|
*
|
||
|
|
* Copyright (C) 2001,2002 Sampo Saaristo
|
||
|
|
* Tampere University of Technology
|
||
|
|
* Institute of Communications Engineering
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <zebra.h>
|
||
|
|
#include "log.h"
|
||
|
|
#include "linklist.h"
|
||
|
|
|
||
|
|
#include "isisd/isis_constants.h"
|
||
|
|
#include "isisd/isis_common.h"
|
||
|
|
#include "isisd/isis_flags.h"
|
||
|
|
|
||
|
|
void flags_initialize(struct flags *flags)
|
||
|
|
{
|
||
|
|
flags->maxindex = 0;
|
||
|
|
flags->free_idcs = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
long int flags_get_index(struct flags *flags)
|
||
|
|
{
|
||
|
|
struct listnode *node;
|
||
|
|
long int index;
|
||
|
|
|
||
|
|
if (flags->free_idcs == NULL || flags->free_idcs->count == 0) {
|
||
|
|
index = flags->maxindex++;
|
||
|
|
} else {
|
||
|
|
node = listhead(flags->free_idcs);
|
||
|
|
index = (long int)listgetdata(node);
|
||
|
|
listnode_delete(flags->free_idcs, (void *)index);
|
||
|
|
index--;
|
||
|
|
}
|
||
|
|
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
|
||
|
|
void flags_free_index(struct flags *flags, long int index)
|
||
|
|
{
|
||
|
|
if (index + 1 == flags->maxindex) {
|
||
|
|
flags->maxindex--;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags->free_idcs == NULL) {
|
||
|
|
flags->free_idcs = list_new();
|
||
|
|
}
|
||
|
|
|
||
|
|
listnode_add(flags->free_idcs, (void *)(index + 1));
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
int flags_any_set(uint32_t *flags)
|
||
|
|
{
|
||
|
|
uint32_t zero[ISIS_MAX_CIRCUITS];
|
||
|
|
memset(zero, 0x00, ISIS_MAX_CIRCUITS * 4);
|
||
|
|
|
||
|
|
return bcmp(flags, zero, ISIS_MAX_CIRCUITS * 4);
|
||
|
|
}
|