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1123e707 OZ |
1 | /* |
2 | * BIRD Library -- Token Bucket Filter | |
3 | * | |
4 | * (c) 2014 Ondrej Zajicek <santiago@crfreenet.org> | |
5 | * (c) 2014 CZ.NIC z.s.p.o. | |
6 | * | |
7 | * Can be freely distributed and used under the terms of the GNU GPL. | |
8 | */ | |
9 | ||
10 | #include "nest/bird.h" | |
11 | ||
12 | void | |
13 | tbf_update(struct tbf *f) | |
14 | { | |
15 | bird_clock_t delta = now - f->timestamp; | |
16 | ||
17 | if (delta == 0) | |
18 | return; | |
19 | ||
20 | f->timestamp = now; | |
21 | ||
22 | if ((0 < delta) && (delta < f->burst)) | |
23 | { | |
24 | u32 next = f->count + delta * f->rate; | |
25 | f->count = MIN(next, f->burst); | |
26 | } | |
27 | else | |
28 | f->count = f->burst; | |
29 | } |