| 35 | #include <sys/systm.h> |
| 36 | |
| 37 | uint32_t |
| 38 | toeplitz_hash(u_int keylen, const uint8_t *key, u_int datalen, |
| 39 | const uint8_t *data) |
| 40 | { |
| 41 | uint32_t hash = 0, v; |
| 42 | u_int i, b; |
| 43 | |
| 44 | /* XXXRW: Perhaps an assertion about key length vs. data length? */ |
| 45 | |
| 46 | v = (key[0]<<24) + (key[1]<<16) + (key[2] <<8) + key[3]; |
| 47 | for (i = 0; i < datalen; i++) { |
| 48 | for (b = 0; b < 8; b++) { |
| 49 | if (data[i] & (1<<(7-b))) |
| 50 | hash ^= v; |
| 51 | v <<= 1; |
| 52 | if ((i + 4) < RSS_KEYSIZE && |
| 53 | (key[i+4] & (1<<(7-b)))) |
| 54 | v |= 1; |
| 55 | } |
| 56 | } |
| 57 | return (hash); |
| 58 | } |
no outgoing calls
no test coverage detected