diff -Nurb linux-2.6.22-510/include/linux/socket.h linux-2.6.22-520/include/linux/socket.h
--- linux-2.6.22-510/include/linux/socket.h	2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-520/include/linux/socket.h	2008-06-06 17:07:56.000000000 -0400
@@ -288,6 +288,8 @@
 #define SOL_TIPC	271
 #define SOL_RXRPC	272
 
+#define SO_SETXID	SO_PEERCRED
+
 /* IPX options */
 #define IPX_TYPE	1
 


--- linux-i686-2.6.22/net/core/sock.c.orig	2008-07-28 16:36:26.000000000 -0400
+++ linux-i686-2.6.22/net/core/sock.c	2008-08-01 11:32:44.000000000 -0400
@@ -455,6 +455,7 @@
 		}
 		sk->sk_xid = val;
 		sk->sk_nid = val;
+		sk->sk_peercred.uid = sk->sk_peercred.gid = val;
 		break;
 
 	case SO_RCVBUF: