#include <linux/netfilter_ipv6/ip6t_HL.h>
MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("IP6 tables Hop Limit modification module");
+MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field modification target");
MODULE_LICENSE("GPL");
-static unsigned int ip6t_hl_target(struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+static unsigned int
+hl_tg6(struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum,
+ const struct xt_target *target, const void *targinfo)
{
struct ipv6hdr *ip6h;
const struct ip6t_HL_info *info = targinfo;
int new_hl;
- if (!skb_make_writable(pskb, (*pskb)->len))
+ if (!skb_make_writable(skb, skb->len))
return NF_DROP;
- ip6h = ipv6_hdr(*pskb);
+ ip6h = ipv6_hdr(skb);
switch (info->mode) {
case IP6T_HL_SET:
return XT_CONTINUE;
}
-static int ip6t_hl_checkentry(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+static bool
+hl_tg6_check(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
{
- struct ip6t_HL_info *info = targinfo;
+ const struct ip6t_HL_info *info = targinfo;
if (info->mode > IP6T_HL_MAXMODE) {
printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
info->mode);
- return 0;
+ return false;
}
- if ((info->mode != IP6T_HL_SET) && (info->hop_limit == 0)) {
+ if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
"make sense with value 0\n");
- return 0;
+ return false;
}
- return 1;
+ return true;
}
-static struct xt_target ip6t_HL = {
+static struct xt_target hl_tg6_reg __read_mostly = {
.name = "HL",
.family = AF_INET6,
- .target = ip6t_hl_target,
+ .target = hl_tg6,
.targetsize = sizeof(struct ip6t_HL_info),
.table = "mangle",
- .checkentry = ip6t_hl_checkentry,
+ .checkentry = hl_tg6_check,
.me = THIS_MODULE
};
-static int __init ip6t_hl_init(void)
+static int __init hl_tg6_init(void)
{
- return xt_register_target(&ip6t_HL);
+ return xt_register_target(&hl_tg6_reg);
}
-static void __exit ip6t_hl_fini(void)
+static void __exit hl_tg6_exit(void)
{
- xt_unregister_target(&ip6t_HL);
+ xt_unregister_target(&hl_tg6_reg);
}
-module_init(ip6t_hl_init);
-module_exit(ip6t_hl_fini);
+module_init(hl_tg6_init);
+module_exit(hl_tg6_exit);