Alan Stern wrote:
I issue a ping request at another host with packet size that results a transfer buffer for bulk out urb that has length equal to maxpacketsize for the out endpoint (512).On Tue, 1 Mar 2005, Stavros Markou wrote:
In order to see that feature I 've issued ping to another network device with sizes divisible to maxpacketsize . Unfortunately, I haven't seen a zero - length packet using my usb analyzer.
Exactly what _do_ you see? And can you indicate where the zero-length packets should occur but don't?
The URB_ZERO_PACKET flag if set enables the host controller driver , I presume, to send a short packet containing no data if the data is aligned to an endpoint packet boundary. In my case when I set this flag I get the same behaviour when my data are aligned to packet size boundary and also when they aren't (no zero packet).
Alan Stern
Stavros Markou.
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