-/*
+/*
* Hop Limit modification target for ip6tables
* Maciej Soltysiak <solt@dns.toxicfilms.tv>
* Based on HW's TTL module
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
+#include <linux/ipv6.h>
-#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv6/ip6t_HL.h>
MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("IP tables Hop Limit modification module");
+MODULE_DESCRIPTION("IP6 tables Hop Limit modification module");
MODULE_LICENSE("GPL");
-static unsigned int ip6t_hl_target(struct sk_buff **pskb,
+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, void *userinfo)
+ const void *targinfo)
{
struct ipv6hdr *ip6h;
const struct ip6t_HL_info *info = targinfo;
- u_int16_t diffs[2];
int new_hl;
if (!skb_make_writable(pskb, (*pskb)->len))
return NF_DROP;
- ip6h = (*pskb)->nh.ipv6h;
+ ip6h = ipv6_hdr(*pskb);
switch (info->mode) {
case IP6T_HL_SET:
break;
}
- if (new_hl != ip6h->hop_limit) {
- diffs[0] = htons(((unsigned)ip6h->hop_limit) << 8) ^ 0xFFFF;
- ip6h->hop_limit = new_hl;
- diffs[1] = htons(((unsigned)ip6h->hop_limit) << 8);
- }
+ ip6h->hop_limit = new_hl;
- return IP6T_CONTINUE;
+ return XT_CONTINUE;
}
static int ip6t_hl_checkentry(const char *tablename,
const void *entry,
const struct xt_target *target,
void *targinfo,
- unsigned int targinfosize,
unsigned int hook_mask)
{
struct ip6t_HL_info *info = targinfo;
if (info->mode > IP6T_HL_MAXMODE) {
- printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
+ printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
info->mode);
return 0;
}
return 1;
}
-static struct ip6t_target ip6t_HL = {
- .name = "HL",
- .target = ip6t_hl_target,
+static struct xt_target ip6t_HL = {
+ .name = "HL",
+ .family = AF_INET6,
+ .target = ip6t_hl_target,
.targetsize = sizeof(struct ip6t_HL_info),
.table = "mangle",
- .checkentry = ip6t_hl_checkentry,
+ .checkentry = ip6t_hl_checkentry,
.me = THIS_MODULE
};
-static int __init init(void)
+static int __init ip6t_hl_init(void)
{
- return ip6t_register_target(&ip6t_HL);
+ return xt_register_target(&ip6t_HL);
}
-static void __exit fini(void)
+static void __exit ip6t_hl_fini(void)
{
- ip6t_unregister_target(&ip6t_HL);
+ xt_unregister_target(&ip6t_HL);
}
-module_init(init);
-module_exit(fini);
+module_init(ip6t_hl_init);
+module_exit(ip6t_hl_fini);