Re: CRLF requirement

In message <9A043F3CF02CD34C8E74AC1594475C738DED40D7@uxcn10-tdc06.UoA.auckland.>, Peter Gutmann writes:

>	   The reason for the 16-bit swap is because
>	   the Fletcher checksum used in TCP/IP doesn't detect 16-bit word
>	   swaps, so this allows the connection-control to be invalidated
>	   without requiring a recalculation of the TCP checksum. 
>	   Someone probably got bonus pay for coming up with this */

Well deserved IMO, that is a neat hack :-)

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

Received on Saturday, 5 July 2014 14:39:40 UTC