add !isupraw - to check if a tcp connection is possible to a target

closes #120

modules/isup.py

@@ -1,3 +1,4 @@
+import socket
 from src import ModuleManager, utils
 
 class Module(ModuleManager.BaseModule):
@@ -18,3 +19,29 @@ class Module(ModuleManager.BaseModule):
 
         event["stdout"].write("%s looks up to me (HTTP %d)" %
             (url, response.code))
+
+    @utils.hook("received.command.isupraw")
+    @utils.kwarg("min_args", 1)
+    @utils.kwarg("help", "Check if a given hostname:port is up or not")
+    @utils.kwarg("usage", "<hostname>[:port]")
+    def isupraw(self, event):
+        hostname, _, port = event["args_split"][0].partition(":")
+        port = utils.parse.try_int(port or "80")
+        if port == None:
+            raise utils.EventError("Port must be a number")
+
+        error = None
+        try:
+            with utils.deadline(seconds=5):
+                socket.create_connection((hostname, port))
+        except utils.DeadlineExceededException:
+            error = "timed out"
+        except Exception as e:
+            error = str(e)
+
+        if error == None:
+            event["stdout"].write("%s:%d looks up to me" % (hostname, port))
+        else:
+            event["stderr"].write("%s:%d looks down to me (%s)" %
+                (hostname, port, error))
+