diff -Nur openswan-2.4.4/linux/include/openswan.h openswan-2.4.4.patched/linux/include/openswan.h
--- openswan-2.4.4/linux/include/openswan.h	2005-04-14 22:21:51.000000000 +0200
+++ openswan-2.4.4.patched/linux/include/openswan.h	2005-12-23 20:31:58.248159750 +0100
@@ -78,6 +78,10 @@
 #define NET_21
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
+#define KERNEL_2615
+#endif
+
 #ifndef IPPROTO_COMP
 #  define IPPROTO_COMP 108
 #endif /* !IPPROTO_COMP */
diff -Nur openswan-2.4.4/linux/net/ipsec/ipcomp.c openswan-2.4.4.patched/linux/net/ipsec/ipcomp.c
--- openswan-2.4.4/linux/net/ipsec/ipcomp.c	2005-08-28 01:40:00.000000000 +0200
+++ openswan-2.4.4.patched/linux/net/ipsec/ipcomp.c	2005-12-23 20:35:02.482256250 +0100
@@ -600,7 +600,9 @@
         memcpy(n->head,
 	       skb->head,
 	       ((char *)iph - (char *)skb->head) + iphlen);
-        n->list=NULL;
+#ifndef KERNEL_2615
+	n->list=NULL;
+#endif
 	n->next=NULL;
 	n->prev=NULL;
         n->sk=NULL;
@@ -657,7 +659,11 @@
 	n->pkt_bridged=skb->pkt_bridged;
 #endif /* NETDEV_23 */
 	n->ip_summed=0;
-        n->stamp=skb->stamp;
+#ifdef KERNEL_2615
+        n->tstamp=skb->tstamp;
+#else
+	n->stamp=skb->stamp;
+#endif
 #ifndef NETDEV_23 /* this seems to have been removed in 2.4 */
 #if defined(CONFIG_SHAPER) || defined(CONFIG_SHAPER_MODULE)
         n->shapelatency=skb->shapelatency;       /* Latency on frame */
diff -Nur openswan-2.4.4/linux/net/ipsec/ipsec_tunnel.c openswan-2.4.4.patched/linux/net/ipsec/ipsec_tunnel.c
--- openswan-2.4.4/linux/net/ipsec/ipsec_tunnel.c	2005-09-22 00:57:43.000000000 +0200
+++ openswan-2.4.4.patched/linux/net/ipsec/ipsec_tunnel.c	2005-12-23 20:38:17.666454500 +0100
@@ -34,6 +34,9 @@
 #include <linux/interrupt.h> /* mark_bh */
 
 #include <net/tcp.h>
+#ifdef KERNEL_2615
+#include <net/inet_timewait_sock.h>
+#endif
 #include <net/udp.h>
 #include <linux/skbuff.h>
 
@@ -272,9 +275,13 @@
 
 		if(ixs->skb->sk) {
 #ifdef NET_26
+#ifdef KERNEL_2615
+			struct inet_timewait_sock *tw;
+			tw = (struct inet_timewait_sock *)ixs->skb->sk;
+#else
 			struct tcp_tw_bucket *tw;
-			
 			tw = (struct tcp_tw_bucket *)ixs->skb->sk;
+#endif
 
 			ixs->sport = ntohs(tw->tw_sport);
 			ixs->dport = ntohs(tw->tw_dport);
diff -Nur openswan-2.4.4/linux/net/ipsec/pfkey_v2.c openswan-2.4.4.patched/linux/net/ipsec/pfkey_v2.c
--- openswan-2.4.4/linux/net/ipsec/pfkey_v2.c	2005-09-14 18:40:45.000000000 +0200
+++ openswan-2.4.4.patched/linux/net/ipsec/pfkey_v2.c	2005-12-23 20:43:21.481441750 +0100
@@ -459,11 +459,17 @@
 				    "skb=0p%p dequeued.\n", skb);
 			printk(KERN_INFO "klips_debug:pfkey_destroy_socket: "
 			       "pfkey_skb contents:");
+#ifndef	KERNEL_2615
+			printk(" list:0p%p", skb->list);
+#endif
 			printk(" next:0p%p", skb->next);
 			printk(" prev:0p%p", skb->prev);
-			printk(" list:0p%p", skb->list);
 			printk(" sk:0p%p", skb->sk);
+#ifdef KERNEL_2615
+			printk(" tstamp:%d.%d", skb->tstamp.off_sec, skb->tstamp.off_usec);
+#else
 			printk(" stamp:%ld.%ld", skb->stamp.tv_sec, skb->stamp.tv_usec);
+#endif
 			printk(" dev:0p%p", skb->dev);
 			if(skb->dev) {
 				if(skb->dev->name) {
@@ -1376,7 +1382,12 @@
 #endif /* NET_21 */
 
 	skb_copy_datagram_iovec(skb, 0, msg->msg_iov, size);
-        sk->sk_stamp=skb->stamp;
+#ifdef KERNEL_2615
+        sk->sk_stamp.tv_sec=skb->tstamp.off_sec;
+        sk->sk_stamp.tv_usec=skb->tstamp.off_usec;
+#else
+	sk->sk_stamp=skb->stamp;
+#endif
 
 	skb_free_datagram(sk, skb);
 	return size;
@@ -1495,8 +1506,13 @@
 #endif					
 					sk->sk_protocol,
 					sk->sk_sndbuf,
+#ifdef KERNEL_2615
+					sk->sk_stamp.tv_sec,
+					sk->sk_stamp.tv_usec,
+#else
 					(unsigned int)sk->sk_stamp.tv_sec,
 					(unsigned int)sk->sk_stamp.tv_usec,
+#endif
 					sk->sk_socket->flags,
 					sk->sk_socket->type,
 					sk->sk_socket->state);