struct usb_interface_descriptor

struct usb_interface_descriptor {__u8  bLength;             // 描述符大小__u8  bDescriptorType;__u8  bInterfaceNumber;__u8  bAlternateSetting;__u8  bNumEndpoints;       // 端点数__u8  bInterfaceClass;     // 接口类__u8  bInterfaceSubClass;  // 接口子类__u8  bInterfaceProtocol;  // 接口协议__u8  iInterface;} __attribute__ ((packed));