Wireshark usb protocol5/30/2023 ![]() I'm just failing to see how this is working. I've read a number of different examples on in, out, transfer packets. IRP information: 0x00, Direction: FDO -> PDO ![]() ![]() The request that is referenced: Frame 32618: 27 bytes on wire (216 bits), 27 bytes captured (216 bits) on interface wireshark_extcap1928, id 0Īrrival Time: 14:02:24.732615000 Eastern Daylight Time seems sometimes to be displayed with the setup data (8 bytes) and sometime not I dont really know what URB is there is no mention of that in the usb protocol. IRP information: 0x01, Direction: PDO -> FDO URB Function: URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER (0x0009) IRP USBD_STATUS: USBD_STATUS_SUCCESS (0x00000000) Frame 32625: 91 bytes on wire (728 bits), 91 bytes captured (728 bits) on interface wireshark_extcap1928, id 0Įncapsulation type: USB packets with USBPcap header (152)Īrrival Time: 14:02:24.741579000 Eastern Daylight Time So I believe I am having trouble understanding how the URBs are working. Wireshark says the request is in an earlier sequence- but I am not understanding where in that particular request is the actual 'request'. This one capture contains the sequence 02010c, which tells me the firmware version of a particular target. I have captured via Wireshark some data and am attempting to understand it as well as the communication protocol for USB.
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