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shared: net - use u32ctz to compute prefixlen

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This commit is contained in:
Tom Gundersen 2014-01-30 17:23:34 +01:00
parent 32216660c7
commit ba91431154
1 changed files with 1 additions and 10 deletions
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11
src/shared/net-util.c
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@ -59,18 +59,9 @@ bool net_match_config(const struct ether_addr *match_mac,
}
unsigned net_netmask_to_prefixlen(const struct in_addr *addr) {
unsigned len = 0;
uint32_t mask;
assert(addr);
mask = be32toh(addr->s_addr);
while (mask) {
len++;
mask = mask << 1;
}
return len;
return 32 - u32ctz(be32toh(addr->s_addr));
}
int config_parse_ifname(const char *unit,