[e2e] TCP/TCPDUMP/Why do I see such a thing happening ?

[Greg Minshall]

> 1048542209.180726 111.111.11.111.1326 > 222.22.222.222.80: . ack 
>   55132 win 63712
> 1048542209.180726 222.22.222.222.80 > 111.111.11.111.1326: . 
>   56568:56580(12) ack 2514 win 64651

>why transfer 56568:56580, (Out-of-order ??) when asked for 
>55132:56568 above and why only 55132:56568<<

i didn't see a reply to this, but i would say there is a bug in the TCP of the 
sender.  my memory cells are unfortunately leaky, but it looks familiar.  i 
suspect someone on the list will recognize it.


also...

>why P is set in the below transfer
> 1048542209.180726 222.22.222.222.80 > 111.111.11.111.1326: P
>   94228:95295(1067) ack 2514 win 64651

presumably because that was the last of the application data 222... had to 
transmit, so it was hinting to 111... that now might be a good time to send 
the accumulated data up to the receiving application.

cheers, Greg