diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/netlink.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/netlink.c b/src/netlink.c index c48e667b..b1e44ad0 100644 --- a/src/netlink.c +++ b/src/netlink.c @@ -234,7 +234,8 @@ static void netlink_gen_verdict(const struct expr *expr, static void netlink_gen_prefix(const struct expr *expr, struct nft_data_linearize *data) { - uint32_t i, cidr, idx; + uint32_t idx; + int32_t i, cidr; uint32_t mask; assert(expr->ops->type == EXPR_PREFIX); @@ -242,11 +243,13 @@ static void netlink_gen_prefix(const struct expr *expr, data->len = div_round_up(expr->prefix->len, BITS_PER_BYTE); cidr = expr->prefix_len; - for (i = 0; i < data->len; i+= 32) { + for (i = 0; (uint32_t)i / BITS_PER_BYTE < data->len; i += 32) { if (cidr - i >= 32) - mask = 0; + mask = 0xffffffff; + else if (cidr - i > 0) + mask = (1 << (cidr - i)) - 1; else - mask = (1 << cidr) - 1; + mask = 0; idx = i / 32; data->value[idx] = mask; |