diff options
Diffstat (limited to 'sys/dev/lnc/if_lnc.c')
| -rw-r--r-- | sys/dev/lnc/if_lnc.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/sys/dev/lnc/if_lnc.c b/sys/dev/lnc/if_lnc.c index 3173b0c..e555ba0 100644 --- a/sys/dev/lnc/if_lnc.c +++ b/sys/dev/lnc/if_lnc.c @@ -190,22 +190,22 @@ lance_probe(struct lnc_softc *sc) return (UNKNOWN); } -static __inline u_long -ether_crc(const u_char *ether_addr) +static __inline u_int32_t +lnc_mchash(caddr_t ether_addr) { -#define POLYNOMIAL 0xEDB88320UL - u_char i, j, addr; - u_int crc = 0xFFFFFFFFUL; - - for (i = 0; i < ETHER_ADDR_LEN; i++) { - addr = *ether_addr++; - for (j = 0; j < MULTICAST_FILTER_LEN; j++) { - crc = (crc >> 1) ^ (((crc ^ addr) & 1) ? POLYNOMIAL : 0); - addr >>= 1; +#define LNC_POLYNOMIAL 0xEDB88320UL + u_int32_t crc = 0xFFFFFFFFUL; + int idx, bit; + u_int8_t data; + + for (idx = 0; idx < ETHER_ADDR_LEN; idx++) { + for (data = *ether_addr++, bit = 0; bit < MULTICAST_FILTER_LEN; bit++) { + crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LNC_POLYNOMIAL : 0); + data >>= 1; } } return crc; -#undef POLYNOMIAL +#undef LNC_POLYNOMIAL } void @@ -262,8 +262,8 @@ lnc_setladrf(struct lnc_softc *sc) if (ifma->ifma_addr->sa_family != AF_LINK) continue; - index = ether_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) - >> 26; + index = lnc_mchash( + LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) >> 26; sc->init_block->ladrf[index >> 3] |= 1 << (index & 7); } } |
