/* IPv4 specific functions of netfilter core */
-
-#include <linux/config.h>
-#ifdef CONFIG_NETFILTER
-
#include <linux/kernel.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
-
#include <linux/ip.h>
-#include <linux/tcp.h>
-#include <linux/udp.h>
-#include <linux/icmp.h>
#include <net/route.h>
#include <net/xfrm.h>
#include <net/ip.h>
}
EXPORT_SYMBOL(ip_route_me_harder);
+#ifdef CONFIG_XFRM
+int ip_xfrm_me_harder(struct sk_buff **pskb)
+{
+ struct flowi fl;
+ unsigned int hh_len;
+ struct dst_entry *dst;
+
+ if (IPCB(*pskb)->flags & IPSKB_XFRM_TRANSFORMED)
+ return 0;
+ if (xfrm_decode_session(*pskb, &fl, AF_INET) < 0)
+ return -1;
+
+ dst = (*pskb)->dst;
+ if (dst->xfrm)
+ dst = ((struct xfrm_dst *)dst)->route;
+ dst_hold(dst);
+
+ if (xfrm_lookup(&dst, &fl, (*pskb)->sk, 0) < 0)
+ return -1;
+
+ dst_release((*pskb)->dst);
+ (*pskb)->dst = dst;
+
+ /* Change in oif may mean change in hh_len. */
+ hh_len = (*pskb)->dst->dev->hard_header_len;
+ if (skb_headroom(*pskb) < hh_len) {
+ struct sk_buff *nskb;
+
+ nskb = skb_realloc_headroom(*pskb, hh_len);
+ if (!nskb)
+ return -1;
+ if ((*pskb)->sk)
+ skb_set_owner_w(nskb, (*pskb)->sk);
+ kfree_skb(*pskb);
+ *pskb = nskb;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ip_xfrm_me_harder);
+#endif
+
void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
EXPORT_SYMBOL(ip_nat_decode_session);
module_init(init);
module_exit(fini);
-
-#endif /* CONFIG_NETFILTER */