odd tcp trace.

[Julian Elischer]

This is a conversation between 2 FreeBSD 4.8 machines.

Does anyone else worry about what is going on here regarding packets
sent and the received window?

only odd setting here is that the slowstart flightsize was set to 30
(it was the only machine using this high latency link) (400mSec rtt but 
lots of bandwidth)

19:53:49.694030 machineA.49177 > machineB.2293: . 28713:30161(1448) ack 
1 win 32942
19:53:49.694039 machineA.49177 > machineB.2293: . 30161:31609(1448) ack 
1 win 32942
19:53:49.694050 machineA.49177 > machineB.2293: . 31609:33057(1448) ack 
1 win 32942
19:53:50.069090 machineB.2293 > machineA.49177: . ack 2897 win 32580
19:53:50.069111 machineA.49177 > machineB.2293: . 33057:34505(1448) ack 
1 win 32942
19:53:50.069120 machineA.49177 > machineB.2293: . 34505:35953(1448) ack 
1 win 32942
19:53:50.069131 machineA.49177 > machineB.2293: . 35953:37401(1448) ack 
1 win 32942
19:53:50.069140 machineA.49177 > machineB.2293: . 37401:38849(1448) ack 
1 win 32942
19:53:50.069189 machineA.49177 > machineB.2293: . 38849:40297(1448) ack 
1 win 32942
19:53:50.069199 machineA.49177 > machineB.2293: . 40297:41745(1448) ack 
1 win 32942
19:53:50.069209 machineA.49177 > machineB.2293: . 41745:43193(1448) ack 
1 win 32942
19:53:50.069218 machineA.49177 > machineB.2293: . 43193:44641(1448) ack 
1 win 32942
19:53:50.069227 machineA.49177 > machineB.2293: . 44641:46089(1448) ack 
1 win 32942
19:53:50.069236 machineA.49177 > machineB.2293: . 46089:47537(1448) ack 
1 win 32942
19:53:50.069245 machineA.49177 > machineB.2293: . 47537:48985(1448) ack 
1 win 32942

accrding to my calculations.. machine A should not fell it ok to send 
any packets beyond
sequence # 2897 + 32580

yet it goes ahead and sends data up to 48985 which is WAY out of range..