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ataradov / usb-sniffer

Low-cost LS/FS/HS USB sniffer with Wireshark interface
BSD 3-Clause "New" or "Revised" License
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Error: libusb_bulk_transfer(): LIBUSB_ERROR_OVERFLOW, usb_capture_callback(): 6 #14

Closed croofec closed 11 months ago

croofec commented 11 months ago

I can't run a speed test after successfully installing. The connection between the USB and the computer works fine, I can't sniff Current usblib version: libusb-1.0.26, all parts from mouser.

IMG_2155

IMG_2163

Hardware or software issue?

ataradov commented 11 months ago

This may be related to a recent change.

Build the binary from the source and change TRANSFER_COUNT in usb.c from 16 to 8 or even 4.

If this helps, please check what is the maximum value that causes the issue.

I'm not sure what defines how many transfers libusb would accept at the time. It appears to be system dependent.

croofec commented 11 months ago

Changing the parameter had no effect even when I set it to 1. I started debugging the software and always the bulk transfer buffer returned the size of 64 which is smaller than the size of 512. This could not cause overflow. But in the dmesg:

IMG_2198

I changed the slot from USB2.0 to USB3.0 and it works :D

ataradov commented 11 months ago

Ok, yes, I don't do anything to accommodate the case when it enumerates as a Full-Speed device.

HS mode is USB 2.0, so there must be something wrong with that specific port or your cables. It looks like it tried to enumerate as HS device, but could not.