diff -r ef09f0ea0c4c -r 1875b9fea0ba tool/MasterDevice.cpp
--- a/tool/MasterDevice.cpp	Fri Feb 26 18:22:02 2010 +0100
+++ b/tool/MasterDevice.cpp	Mon Mar 01 18:33:42 2010 +0100
@@ -526,4 +526,19 @@
 
 #endif
 
+/****************************************************************************/
+
+void MasterDevice::readSoe(ec_ioctl_slave_soe_t *data)
+{
+    if (ioctl(fd, EC_IOCTL_SLAVE_SOE_READ, data) < 0) {
+        if (errno == EIO && data->error_code) {
+            throw MasterDeviceSoeException(data->error_code);
+        } else {
+			stringstream err;
+			err << "Failed to read IDN: " << strerror(errno);
+			throw MasterDeviceException(err);
+		}
+    }
+}
+
 /*****************************************************************************/