int *hotdrop)
{
const struct xt_length_info *info = matchinfo;
- u_int16_t pktlen = ntohs(skb->nh.iph->tot_len);
-
+ u_int16_t pktlen = ntohs(ip_hdr(skb)->tot_len);
+
return (pktlen >= info->min && pktlen <= info->max) ^ info->invert;
}
int *hotdrop)
{
const struct xt_length_info *info = matchinfo;
- u_int16_t pktlen = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr);
-
+ const u_int16_t pktlen = (ntohs(ipv6_hdr(skb)->payload_len) +
+ sizeof(struct ipv6hdr));
+
return (pktlen >= info->min && pktlen <= info->max) ^ info->invert;
}
-static struct xt_match length_match = {
- .name = "length",
- .match = match,
- .matchsize = sizeof(struct xt_length_info),
- .family = AF_INET,
- .me = THIS_MODULE,
-};
-
-static struct xt_match length6_match = {
- .name = "length",
- .match = match6,
- .matchsize = sizeof(struct xt_length_info),
- .family = AF_INET6,
- .me = THIS_MODULE,
+static struct xt_match xt_length_match[] = {
+ {
+ .name = "length",
+ .family = AF_INET,
+ .match = match,
+ .matchsize = sizeof(struct xt_length_info),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "length",
+ .family = AF_INET6,
+ .match = match6,
+ .matchsize = sizeof(struct xt_length_info),
+ .me = THIS_MODULE,
+ },
};
static int __init xt_length_init(void)
{
- int ret;
- ret = xt_register_match(&length_match);
- if (ret)
- return ret;
- ret = xt_register_match(&length6_match);
- if (ret)
- xt_unregister_match(&length_match);
-
- return ret;
+ return xt_register_matches(xt_length_match,
+ ARRAY_SIZE(xt_length_match));
}
static void __exit xt_length_fini(void)
{
- xt_unregister_match(&length_match);
- xt_unregister_match(&length6_match);
+ xt_unregister_matches(xt_length_match, ARRAY_SIZE(xt_length_match));
}
module_init(xt_length_init);