+// ----------------------------------------------------------------
+
+std::string
+usrp_serial_number(libusb_device_handle *udh)
+{
+ libusb_device_descriptor desc =
+ _get_usb_device_descriptor (_get_usb_device (udh));
+
+ unsigned char iserial = desc.iSerialNumber;
+ if (iserial == 0)
+ return "";
+
+ unsigned char buf[1024];
+ if (_get_usb_string_descriptor (udh, iserial, buf, sizeof(buf)) < 0)
+ return "";
+
+ return (char*) buf;
+}