[scanner] begin scanner implementation - non invasive

cdist/scan.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+#
+# 2020 Nico Schottelius (nico-cdist at schottelius.org)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+from scapy.all import *
+from scapy.data import ETHER_TYPES
+
+
+class Scanner(object):
+    def recv_msg_cpu(self, pkg):
+#        print(pkg.__repr__())
+        if ICMPv6EchoReply in pkg:
+            host = pkg['IPv6'].src
+            print(f"Host {host} is alive")
+
+
+    def scan(self):
+        sniff(iface="wlan0",
+              filter="icmp6",
+              prn=self.recv_msg_cpu)
+
+
+if __name__ == '__main__':
+    s = Scanner()
+    s.scan()