--- zzzz-none-000/linux-2.4.17/include/linux/net.h	2001-11-22 19:46:19.000000000 +0000
+++ sangam-fb-401/linux-2.4.17/include/linux/net.h	2005-04-05 07:07:46.000000000 +0000
@@ -139,6 +139,7 @@
 extern int	sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
 extern int	sock_readv_writev(int type, struct inode * inode, struct file * file,
 				  const struct iovec * iov, long count, long size);
+extern struct socket *sockfd_lookup(int fd, int *err);
 
 extern int	net_ratelimit(void);
 extern unsigned long net_random(void);