*
* Extended to all five netfilter hooks by Brad Chapman & Harald Welte
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netdevice.h>
#include <net/sock.h>
#include <net/route.h>
#include <linux/ip.h>
+#include <net/ip.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
{ { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
-NF_ACCEPT - 1 } },
/* LOCAL_IN */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
0,
sizeof(struct ipt_entry),
sizeof(struct ipt_standard),
{ { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
-NF_ACCEPT - 1 } },
/* FORWARD */
- { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
0,
sizeof(struct ipt_entry),
sizeof(struct ipt_standard),
}
};
-static struct ipt_table packet_mangler = {
+static struct xt_table packet_mangler = {
.name = "mangle",
.valid_hooks = MANGLE_VALID_HOOKS,
.lock = RW_LOCK_UNLOCKED,
.me = THIS_MODULE,
+ .af = AF_INET,
};
/* The work comes in here from netfilter.c. */
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL);
+ return ipt_do_table(pskb, hook, in, out, &packet_mangler);
}
static unsigned int
int (*okfn)(struct sk_buff *))
{
unsigned int ret;
+ const struct iphdr *iph;
u_int8_t tos;
- u_int32_t saddr, daddr;
- unsigned long nfmark;
+ __be32 saddr, daddr;
+ u_int32_t mark;
/* root is playing with raw sockets. */
if ((*pskb)->len < sizeof(struct iphdr)
- || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
+ || ip_hdrlen(*pskb) < sizeof(struct iphdr)) {
if (net_ratelimit())
printk("ipt_hook: happy cracking.\n");
return NF_ACCEPT;
}
/* Save things which could affect route */
- nfmark = (*pskb)->nfmark;
- saddr = (*pskb)->nh.iph->saddr;
- daddr = (*pskb)->nh.iph->daddr;
- tos = (*pskb)->nh.iph->tos;
+ mark = (*pskb)->mark;
+ iph = ip_hdr(*pskb);
+ saddr = iph->saddr;
+ daddr = iph->daddr;
+ tos = iph->tos;
- ret = ipt_do_table(pskb, hook, in, out, &packet_mangler, NULL);
+ ret = ipt_do_table(pskb, hook, in, out, &packet_mangler);
/* Reroute for ANY change. */
- if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE
- && ((*pskb)->nh.iph->saddr != saddr
- || (*pskb)->nh.iph->daddr != daddr
-#ifdef CONFIG_IP_ROUTE_FWMARK
- || (*pskb)->nfmark != nfmark
-#endif
- || (*pskb)->nh.iph->tos != tos))
- return ip_route_me_harder(pskb) == 0 ? ret : NF_DROP;
+ if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE) {
+ iph = ip_hdr(*pskb);
+
+ if (iph->saddr != saddr ||
+ iph->daddr != daddr ||
+ (*pskb)->mark != mark ||
+ iph->tos != tos)
+ if (ip_route_me_harder(pskb, RTN_UNSPEC))
+ ret = NF_DROP;
+ }
return ret;
}
.hook = ipt_route_hook,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
+ .hooknum = NF_IP_PRE_ROUTING,
.priority = NF_IP_PRI_MANGLE,
},
{
},
};
-static int __init init(void)
+static int __init iptable_mangle_init(void)
{
int ret;
return ret;
/* Register hooks */
- ret = nf_register_hook(&ipt_ops[0]);
+ ret = nf_register_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
if (ret < 0)
goto cleanup_table;
- ret = nf_register_hook(&ipt_ops[1]);
- if (ret < 0)
- goto cleanup_hook0;
-
- ret = nf_register_hook(&ipt_ops[2]);
- if (ret < 0)
- goto cleanup_hook1;
-
- ret = nf_register_hook(&ipt_ops[3]);
- if (ret < 0)
- goto cleanup_hook2;
-
- ret = nf_register_hook(&ipt_ops[4]);
- if (ret < 0)
- goto cleanup_hook3;
-
return ret;
- cleanup_hook3:
- nf_unregister_hook(&ipt_ops[3]);
- cleanup_hook2:
- nf_unregister_hook(&ipt_ops[2]);
- cleanup_hook1:
- nf_unregister_hook(&ipt_ops[1]);
- cleanup_hook0:
- nf_unregister_hook(&ipt_ops[0]);
cleanup_table:
ipt_unregister_table(&packet_mangler);
-
return ret;
}
-static void __exit fini(void)
+static void __exit iptable_mangle_fini(void)
{
- unsigned int i;
-
- for (i = 0; i < sizeof(ipt_ops)/sizeof(struct nf_hook_ops); i++)
- nf_unregister_hook(&ipt_ops[i]);
-
+ nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
ipt_unregister_table(&packet_mangler);
}
-module_init(init);
-module_exit(fini);
+module_init(iptable_mangle_init);
+module_exit(iptable_mangle_fini);