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bird/lib/tbf.c
2014-10-02 12:52:50 +02:00

30 lines
520 B
C

/*
* BIRD Library -- Token Bucket Filter
*
* (c) 2014 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2014 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
void
tbf_update(struct tbf *f)
{
bird_clock_t delta = now - f->timestamp;
if (delta == 0)
return;
f->timestamp = now;
if ((0 < delta) && (delta < f->burst))
{
u32 next = f->count + delta * f->rate;
f->count = MIN(next, f->burst);
}
else
f->count = f->burst;
}