nefarious: experimental host changing support via FAKE

This seems to work fine for changing remote users' hosts, but changing the host of internal PyLink clients doesn't seem to work at all...

protocols/nefarious.py

@@ -175,7 +175,8 @@ class P10Protocol(Protocol):
             'XR': 'XREPLY',
             'SN': 'SVSNICK',
             'SJ': 'SVSJOIN',
-            'SH': 'SETHOST'
+            'SH': 'SETHOST',
+            'FA': 'FAKE'
         }
         # If the token isn't in the list, return it raw.
         return tokens.get(token, token)
@@ -562,7 +563,23 @@ class P10Protocol(Protocol):
         self.irc.channels[target].topicset = True
 
     def updateClient(self, target, field, text):
-        raise NotImplementedError
+        """Updates the ident or host of any connected client."""
+        # This uses the FAKE command, which isn't documented anywhere
+        # but uses the target UID and host as two arguments.
+
+        if field == 'HOST':
+            self._send(self.irc.sid, 'FA %s %s' % (target, text))
+            # Save the host change as a user mode (this is what P10 does),
+            # so further host checks work.
+            utils.applyModes(self.irc, target, [('+f', text)])
+
+            # P10 cloaks aren't as simple as just replacing the displayed host with the one we're
+            # sending. Check for cloak changes properly.
+            self.checkCloakChange(target)
+
+            # We don't need to send any hooks here, checkCloakChange does that for us.
+        else:
+            raise NotImplementedError
 
     ### HANDLERS
 
@@ -1225,5 +1242,16 @@ class P10Protocol(Protocol):
         # Check for any cloak changes now.
         self.checkCloakChange(target)
 
+    def handle_fake(self, numeric, command, args):
+        """Handles incoming FAKE hostmask changes."""
+        target = args[0]
+        text = args[1]
+
+        # Assume a usermode +f change, and then update the cloak checking.
+        utils.applyModes(self.irc, target, [('+f', text)])
+
+        self.checkCloakChange(target)
+        # We don't need to send any hooks here, checkCloakChange does that for us.
+
 
 Class = P10Protocol