-Index: linux-2.6.21.7/include/net/xfrmudp.h
-===================================================================
--- /dev/null
-+++ linux-2.6.21.7/include/net/xfrmudp.h
++++ b/include/net/xfrmudp.h
@@ -0,0 +1,10 @@
+/*
+ * pointer to function for type that xfrm4_input wants, to permit
+extern int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
+ , xfrm4_rcv_encap_t *oldfunc);
+extern int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func);
-Index: linux-2.6.21.7/net/ipv4/Kconfig
-===================================================================
---- linux-2.6.21.7.orig/net/ipv4/Kconfig
-+++ linux-2.6.21.7/net/ipv4/Kconfig
+--- a/net/ipv4/Kconfig
++++ b/net/ipv4/Kconfig
@@ -266,6 +266,12 @@ config NET_IPGRE_BROADCAST
Network), but can be distributed all over the Internet. If you want
to do that, say Y here and to "IP multicast routing" below.
config IP_MROUTE
bool "IP: multicast routing"
depends on IP_MULTICAST
-Index: linux-2.6.21.7/net/ipv4/udp.c
-===================================================================
---- linux-2.6.21.7.orig/net/ipv4/udp.c
-+++ linux-2.6.21.7/net/ipv4/udp.c
+--- a/net/ipv4/udp.c
++++ b/net/ipv4/udp.c
@@ -101,12 +101,15 @@
#include <net/route.h>
#include <net/checksum.h>