On Tue, 11 Feb 2014, Kasberger Andreas wrote: > > >> I saw the in the device endpoint ep82/ep83 at wMaxPacketSize a size > > >> "0040". > >> > >> As far as I understand the "packet 7092" in wireshark with URB data > >> length 128 should not possible? What happens at such packets sizes? > >> Or does wireshark just joking me -- > > > > Wireshark adds 64 bytes of overhead to each packet it captures. > > > > Yes Alan, overall wireshark shows 192 byte for that packet.
Ah, I see the reason for your confusion. On USB buses, Wireshark captures URBs, not packets. An URB can contain multiple packets. In this case, there was a single URB containing two data packets. Each packet was 64 bytes, and the URB was 128 bytes. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
