match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
- const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
match6(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
- const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
return (pktlen >= info->min && pktlen <= info->max) ^ info->invert;
}
+static int
+checkentry(const char *tablename,
+ const void *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ if (matchsize != XT_ALIGN(sizeof(struct xt_length_info)))
+ return 0;
+
+ return 1;
+}
+
static struct xt_match length_match = {
.name = "length",
- .match = match,
- .matchsize = sizeof(struct xt_length_info),
- .family = AF_INET,
+ .match = &match,
+ .checkentry = &checkentry,
.me = THIS_MODULE,
};
-
static struct xt_match length6_match = {
.name = "length",
- .match = match6,
- .matchsize = sizeof(struct xt_length_info),
- .family = AF_INET6,
+ .match = &match6,
+ .checkentry = &checkentry,
.me = THIS_MODULE,
};
-static int __init xt_length_init(void)
+static int __init init(void)
{
int ret;
- ret = xt_register_match(&length_match);
+ ret = xt_register_match(AF_INET, &length_match);
if (ret)
return ret;
- ret = xt_register_match(&length6_match);
+ ret = xt_register_match(AF_INET6, &length6_match);
if (ret)
- xt_unregister_match(&length_match);
+ xt_unregister_match(AF_INET, &length_match);
return ret;
}
-static void __exit xt_length_fini(void)
+static void __exit fini(void)
{
- xt_unregister_match(&length_match);
- xt_unregister_match(&length6_match);
+ xt_unregister_match(AF_INET, &length_match);
+ xt_unregister_match(AF_INET6, &length6_match);
}
-module_init(xt_length_init);
-module_exit(xt_length_fini);
+module_init(init);
+module_exit(fini);