On Mon, 26 Jul 2004, Duncan Sands wrote: > Hi Alan, I tried using USB snoopy with windows XP (the one from > sourceforge), but it seems to miss some urbs, in particular I don't see > any string descriptor fetches! What do you use for snooping on windows?
On the Windows side I use USB Snoopy also. There's no question, it definitely misses some URBs. I suppose that's because it utilizes the Windows USB kernel filter facility and that facility doesn't see all the packets. > Also, I tried running windows XP inside vmware, and using the usbfs > snooping that Greg added recently. Interestingly, when run inside > vmware, windows rejected the strings [1], both with and without the > driver for the modem. This suggests to me that either: (A) the modem > sends valid strings when set up by native windows XP, i.e. we get bad > strings because we initialize the modem differently, or (B) the vmware > USB implementation is causing the problem... > > Ciao, > > Duncan. > > [1] This is not completely clear, since windows also displayed the wrong device > class, > even though it gets that information OK - so maybe vmware is confusing it. I changed the file_storage gadget so that it would send full 255-byte replies (with type = length = 0) to string fetches when the requested length was 255 bytes and the string number was > 0. It's hard to tell whether Windows liked it or not, because in any case the descriptors were fetched twice -- the first time asking for 255 bytes and the second time asking for just the first two bytes and then just the actual string length. I also didn't bother to look if Windows displayed the correct strings, and it's always possible that those strings were already in the registry because of earlier tests. I don't know how to remove old device entries from Windows 2000. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
