Module Name:	src
Committed By:	thorpej
Date:		Sun Jan 24 01:19:28 UTC 1999

Modified Files:
	src/sys/netinet: tcp_input.c tcp_var.h
Log Message:
* Completely rewrite syn_cache_respond().
- Don't use tcp_respond(), instead create the tcp/ip header from scratch,
and send it ourself.
- Reuse the mbuf that carried the SYN, or allocate one if that is not
available.
- Cache the route we look up to do the Path MTU Discovery check, and
transfer the reference to that route to the inpcb when the connection
completes.
* Macro'ize a small, but often repeated code fragment.