diff options
Diffstat (limited to 'networking/libiproute/utils.c')
-rw-r--r-- | networking/libiproute/utils.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/networking/libiproute/utils.c b/networking/libiproute/utils.c index 4ce230356..3cce4a06e 100644 --- a/networking/libiproute/utils.c +++ b/networking/libiproute/utils.c | |||
@@ -175,14 +175,13 @@ static void get_prefix_1(inet_prefix *dst, char *arg, int family) | |||
175 | if (netmask_pfx.family == AF_INET) { | 175 | if (netmask_pfx.family == AF_INET) { |
176 | /* fill in prefix length of dotted quad */ | 176 | /* fill in prefix length of dotted quad */ |
177 | uint32_t mask = ntohl(netmask_pfx.data[0]); | 177 | uint32_t mask = ntohl(netmask_pfx.data[0]); |
178 | uint32_t host = ~mask; | 178 | uint32_t inv = ~mask; |
179 | 179 | ||
180 | /* a valid netmask must be 2^n - 1 */ | 180 | /* a valid netmask must be 11..10..00 */ |
181 | if (host & (host + 1)) | 181 | if (inv & (inv + 1)) |
182 | goto bad; | 182 | goto bad; /* inv is not 00..01..11 */ |
183 | 183 | ||
184 | for (plen = 0; mask; mask <<= 1) | 184 | plen = bb_popcnt_32(mask); |
185 | ++plen; | ||
186 | if (plen > dst->bitlen) | 185 | if (plen > dst->bitlen) |
187 | goto bad; | 186 | goto bad; |
188 | /* dst->flags |= PREFIXLEN_SPECIFIED; */ | 187 | /* dst->flags |= PREFIXLEN_SPECIFIED; */ |