Submitted by: David Chappell
Email: David.Chappell@mail.trincoll.edu

This is a patch for Linux version 2.0.25.  It fixes a problem which occurs
when Linux is sending to an Extended Systems Pock Print Server.  The problem
is really in the print server, but this patch makes Linux more
understanding.


*** tcp_output.c.orig	Fri Jan  3 10:45:27 1997
--- tcp_output.c	Fri Jan  3 10:40:47 1997
***************
*** 459,464 ****
--- 459,470 ----
  		th = (struct tcphdr *)(((char *)iph) + (iph->ihl << 2));
  		size = ntohs(iph->tot_len) - (iph->ihl<<2);

+ 		/* If the remote end has acknowledged the first part
+ 		   of this segment, don't retransmit that part.  Some buggy
+ 		   TCP implementations won't understand if we do. */
+ 		if (after(sk->rcv_ack_seq,skb->seq+th->syn+th->fin))
+ 			tcp_shrink_skb(sk,skb,sk->rcv_ack_seq);
+ 
  		/*
  		 *	Note: We ought to check for window limits here but
  		 *	currently this is done (less efficiently) elsewhere.