Hi Jan,
this was a missunderstanding, I had tcpdump run on my nonrt host. On the rtbox the flashdisk is to small to hold a static linked tcpdump.
Bu I went a bit deeper into the stuff and found that 'len' in the call
skb_put(skb, len) is 20 more than the according call in the nonrt driver,
and I found 20 additional bytes at skb->data according to the nonrt
stuff. Change IP_OVERHEAD from 34 to 14 in rtnetproxy.c solved the problem.
Now the tcp stuff is working fine in my rt environment.
Confirmed, you discovered a bug in rtnetproxy which was introduced with the restructuring in 0.5.5 (it's always nice to have our online cross reference :)). It's now fixed in the CVS.
Jan
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