| title: | TCP Connections hangs Sequence Number decre |
|
Hi,
Ive a Problem with some TCP Connections on IPv6. The Connection
suddenly hangs and after some time there is a "Connection reset by
peer". The problem shows up when using rsync. The Kernel Version is
2.4.21-xfs.
Here a dump with tethereal on the intersting part of the connection.
Ive the change the hostnames involved to "foo" and "bar", while "bar"
is the local host running 2.4.21-xfs.
[ looks like bar has missed 3183058164 ]
20493 107.874144 foo - bar TCP rsync 43084 [ACK] Seq=3183092436 Ack=3636551868 Win=0 Len=1408
20494 107.874159 bar - foo TCP 43084 rsync [ACK] Seq=3636551868 Ack=3183058164 Win=50688 Len=0[Short Frame]
20495 107.874150 foo - bar TCP rsync 43084 [ACK] Seq=3183093844 Ack=3636551868 Win=0 Len=20
20496 107.874167 bar - foo TCP 43084 rsync [ACK] Seq=3636551868 Ack=3183058164 Win=50688 Len=0[Short Frame]
20497 107.879092 foo - bar TCP rsync 43084 [ACK] Seq=3183093864 Ack=3636551868 Win=0 Len=1408
20498 107.879107 bar - foo TCP 43084 rsync [ACK] Seq=3636551868 Ack=3183058164 Win=50688 Len=0[Short Frame]
20499 107.879098 foo - bar TCP rsync 43084 [ACK] Seq=3183095272 Ack=3636551868 Win=0 Len=20
20500 107.879115 bar - foo TCP 43084 rsync [ACK] Seq=3636551868 Ack=3183058164 Win=50688 Len=0[Short Frame]
[ now foo sends 3183058164 ]
20501 108.097485 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20502 108.637482 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
[ but bar still wants it and decrementes the Sequence Number. WTF?]
20503 108.869568 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20504 108.910164 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20505 109.717520 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20506 110.909585 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20507 110.949344 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20508 111.877766 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20509 114.939611 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20510 114.979986 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20511 116.197930 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20512 122.979668 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20513 123.019675 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20514 124.838756 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20515 139.019753 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20516 139.060408 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20517 142.120094 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20518 171.059942 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20519 171.100208 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20520 176.685794 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20521 235.100317 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20522 235.141199 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20523 245.808749 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20524 355.141019 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20525 355.181162 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20526 365.818884 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
20527 475.181719 bar - foo TCP 43084 rsync [ACK] Seq=3636551867 Ack=3183058164 Win=50688 Len=0[Short Frame]
20528 475.222354 foo - bar TCP rsync 43084 [ACK] Seq=3183095292 Ack=3636551868 Win=0 Len=0
20529 485.828516 foo - bar TCP rsync 43084 [ACK] Seq=3183058164 Ack=3636551868 Win=0 Len=1408
[ This goes on for some time and then the connection gets aborted ]
Please let me know if you need more informations about this connection
or the hosts involded or - even better - let me know about a patch or
something else, that fixes it.
Bye,
Christoph
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