mirror of https://github.com/OISF/suricata
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/* Copyright (c) 2008 by Victor Julien <victor@inliniac.net> */
|
|
|
|
#ifndef __BLOOMFILTER_H__
|
|
#define __BLOOMFILTER_H__
|
|
|
|
/* Bloom Filter structure */
|
|
typedef struct BloomFilter_ {
|
|
uint8_t *bitarray;
|
|
uint32_t bitarray_size;
|
|
uint8_t hash_iterations;
|
|
uint32_t (*Hash)(void *, uint16_t, uint8_t, uint32_t);
|
|
} BloomFilter;
|
|
|
|
/* prototypes */
|
|
BloomFilter *BloomFilterInit(uint32_t, uint8_t, uint32_t (*Hash)(void *, uint16_t, uint8_t, uint32_t));
|
|
void BloomFilterFree(BloomFilter *);
|
|
void BloomFilterPrint(BloomFilter *);
|
|
int BloomFilterAdd(BloomFilter *, void *, uint16_t);
|
|
uint32_t BloomFilterMemoryCnt(BloomFilter *);
|
|
uint32_t BloomFilterMemorySize(BloomFilter *);
|
|
|
|
void BloomFilterRegisterTests(void);
|
|
|
|
/** ----- Inline functions ---- */
|
|
|
|
static inline int BloomFilterTest(BloomFilter *, void *, uint16_t);
|
|
|
|
static inline int BloomFilterTest(BloomFilter *bf, void *data, uint16_t datalen) {
|
|
uint8_t iter = 0;
|
|
uint32_t hash = 0;
|
|
int hit = 1;
|
|
|
|
for (iter = 0; iter < bf->hash_iterations; iter++) {
|
|
hash = bf->Hash(data, datalen, iter, bf->bitarray_size);
|
|
if (!(bf->bitarray[hash/8] & (1<<hash%8))) {
|
|
hit = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return hit;
|
|
}
|
|
|
|
#endif /* __BLOOMFILTER_H__ */
|
|
|