Adds iperf timeout for bandwith measurements.

measurement_main.py

                 is_measurement_done = False
                 while not is_measurement_done:
                     try:
-                        subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
-                        is_measurement_done = True
-                    except:
-                        print_message("iPerf timed out. Retry...")
+                        try:
+                            subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
+                            is_measurement_done = True
+                        except:
+                            print_message("iPerf timed out. Retry...")
+                    except KeyboardInterrupt:
+                        exit()
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     tcp_algo
                     str(self.config["port"]),
                     "--one-off",
                 ]
-                is_measurement_done = False
                 while not is_measurement_done:
                     try:
-                        subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
-                        is_measurement_done = True
-                    except:
-                        print_message("iPerf timed out. Retry...")
+                        try:
+                            subprocess.call(iperf_command, timeout=float(time) + 1.0 + TIMEOUT_OFFSET)
+                            is_measurement_done = True
+                        except:
+                            print_message("iPerf timed out. Retry...")
+                    except KeyboardInterrupt:
+                        exit()
                 sleep(2)
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                 is_measurement_done = False
                 while not is_measurement_done:
                     try:
-                        subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
-                        is_measurement_done = True
-                    except:
-                        print_message("iPerf timed out. Retry...")
+                        try:
+                            subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
+                            is_measurement_done = True
+                        except:
+                            print_message("iPerf timed out. Retry...")
+                    except KeyboardInterrupt:
+                        exit()
                 sleep(4)
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                 is_measurement_done = False
                 while not is_measurement_done:
                     try:
-                        subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
-                        is_measurement_done = True
-                    except:
-                        print_message("iPerf timed out. Retry...")
+                        try:
+                            subprocess.call(iperf_command, timeout=float(time) + 2.0 + TIMEOUT_OFFSET)
+                            is_measurement_done = True
+                        except:
+                            print_message("iPerf timed out. Retry...")
+                    except KeyboardInterrupt:
+                        exit()
                 processHandler.kill_all()
                 congestion_control_index = (congestion_control_index + 1) % len(
                     tcp_algo