add Attack base class

attacks/Attack.py

+import abc
+import signal
+from typing import List
+from multiprocessing import Process
+
+class Attack(object):
+    _processes: List[Process]
+
+    def __init__(self) -> None:
+        self._processes = []
+
+    @abc.abstractmethod
+    def run(self):
+        """"""
+
+    def _wait_for_sigint(self):
+        signal.signal(signal.SIGINT, self._sig_handler)
+        print("Press Ctrl+C to exit")
+        signal.pause()
+
+    def _sig_handler(self, sig, frame):
+        print("Exiting")
+        for process in self._processes:
+            if process is not None and process.is_alive():
+                process.kill()
+                process.join()
+
+    def _wait_for_processes(self):
+        for proc in self._processes:
+            proc.join()

attacks/__init__.py

+from attacks.Attack import Attack