哪位朋友能否解释一下Snoopy Output的具体含义？

00005058 302.22349097 >>>>>>> URB 673 going down...
00005059 302.22350410 -- URB_FUNCTION_CLASS_OTHER:
00005060 302.22352366  TransferFlags          = 00000003 (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
00005061 302.22353847  TransferBufferLength = 00000004
00005062 302.22355271  TransferBuffer       = 81397268
00005063 302.22356556  TransferBufferMDL    = 00000000
00005064 302.22357925  UrbLink                 = 00000000
00005065 302.22359210  RequestTypeReservedBits = a3
00005066 302.22360468  Request                 = 00
00005067 302.22361753  Value                   = 0000
00005068 302.22363038  Index                   = 0001
00005070 302.22366390 <<<<<<< URB 673 coming back...
00005071 302.22367759 -- URB_FUNCTION_CONTROL_TRANSFER:
00005072 302.22369240  PipeHandle           = 81397474
00005073 302.22371056  TransferFlags        = 00000003 (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
例如下面这段输出它的具体含义是什么？

00005074 302.22372536  TransferBufferLength = 00000004
00005075 302.22373933  TransferBuffer       = 81397268
00005076 302.22375386  TransferBufferMDL    = 805e7ac8
00005078 302.22381476    0000: 03 03 00 00
00005079 302.22382677  UrbLink              = 00000000
00005080 302.22391980  SetupPacket          : a3 00 00 00 01 00 04 00
00005081 302.22397372 UsbSnoop - IRP_MJ_INTERNAL_DEVICE_CONTROL, IOCTL_INTERNAL_USB_SUBMIT_URB

请问可否发一份USB snoopy给我！newtech2000@163.com
先谢过了！