#include <net/checksum.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
-#ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat_rule.h>
-#else
-#include <linux/netfilter_ipv4/ip_nat_rule.h>
-#endif
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
-MODULE_DESCRIPTION("iptables REDIRECT target module");
-
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
+MODULE_DESCRIPTION("Xtables: Connection redirection to localhost");
/* FIXME: Take multiple ranges --RR */
-static int
-redirect_check(const char *tablename,
- const void *e,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+static bool
+redirect_tg_check(const char *tablename, const void *e,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
{
- const struct ip_nat_multi_range_compat *mr = targinfo;
+ const struct nf_nat_multi_range_compat *mr = targinfo;
if (mr->range[0].flags & IP_NAT_RANGE_MAP_IPS) {
- DEBUGP("redirect_check: bad MAP_IPS.\n");
- return 0;
+ pr_debug("redirect_check: bad MAP_IPS.\n");
+ return false;
}
if (mr->rangesize != 1) {
- DEBUGP("redirect_check: bad rangesize %u.\n", mr->rangesize);
- return 0;
+ pr_debug("redirect_check: bad rangesize %u.\n", mr->rangesize);
+ return false;
}
- return 1;
+ return true;
}
static unsigned int
-redirect_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)
+redirect_tg(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 ip_conntrack *ct;
+ struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
__be32 newdst;
- const struct ip_nat_multi_range_compat *mr = targinfo;
- struct ip_nat_range newrange;
+ const struct nf_nat_multi_range_compat *mr = targinfo;
+ struct nf_nat_range newrange;
- IP_NF_ASSERT(hooknum == NF_IP_PRE_ROUTING
- || hooknum == NF_IP_LOCAL_OUT);
+ NF_CT_ASSERT(hooknum == NF_INET_PRE_ROUTING
+ || hooknum == NF_INET_LOCAL_OUT);
- ct = ip_conntrack_get(*pskb, &ctinfo);
- IP_NF_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
+ ct = nf_ct_get(skb, &ctinfo);
+ NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
/* Local packets: make them go to loopback */
- if (hooknum == NF_IP_LOCAL_OUT)
+ if (hooknum == NF_INET_LOCAL_OUT)
newdst = htonl(0x7F000001);
else {
struct in_device *indev;
newdst = 0;
rcu_read_lock();
- indev = __in_dev_get_rcu((*pskb)->dev);
+ indev = __in_dev_get_rcu(skb->dev);
if (indev && (ifa = indev->ifa_list))
newdst = ifa->ifa_local;
rcu_read_unlock();
}
/* Transfer from original range. */
- newrange = ((struct ip_nat_range)
+ newrange = ((struct nf_nat_range)
{ mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
newdst, newdst,
mr->range[0].min, mr->range[0].max });
/* Hand modified range to generic setup. */
- return ip_nat_setup_info(ct, &newrange, hooknum);
+ return nf_nat_setup_info(ct, &newrange, IP_NAT_MANIP_DST);
}
-static struct xt_target redirect_reg = {
+static struct xt_target redirect_tg_reg __read_mostly = {
.name = "REDIRECT",
.family = AF_INET,
- .target = redirect_target,
- .targetsize = sizeof(struct ip_nat_multi_range_compat),
+ .target = redirect_tg,
+ .targetsize = sizeof(struct nf_nat_multi_range_compat),
.table = "nat",
- .hooks = (1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT),
- .checkentry = redirect_check,
+ .hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
+ .checkentry = redirect_tg_check,
.me = THIS_MODULE,
};
-static int __init ipt_redirect_init(void)
+static int __init redirect_tg_init(void)
{
- return xt_register_target(&redirect_reg);
+ return xt_register_target(&redirect_tg_reg);
}
-static void __exit ipt_redirect_fini(void)
+static void __exit redirect_tg_exit(void)
{
- xt_unregister_target(&redirect_reg);
+ xt_unregister_target(&redirect_tg_reg);
}
-module_init(ipt_redirect_init);
-module_exit(ipt_redirect_fini);
+module_init(redirect_tg_init);
+module_exit(redirect_tg_exit);