scapy python 2/3

1 files changed, 36 insertions, 0 deletions

diff --git a/scripts/external_libs/scapy-2.3.1/python3/scapy/layers/l2tp.py b/scripts/external_libs/scapy-2.3.1/python3/scapy/layers/l2tp.py
new file mode 100644
index 00000000..0b56db21
--- /dev/null
+++ b/scripts/external_libs/scapy-2.3.1/python3/scapy/layers/l2tp.py
@@ -0,0 +1,36 @@
+## This file is part of Scapy
+## See http://www.secdev.org/projects/scapy for more informations
+## Copyright (C) Philippe Biondi <phil@secdev.org>
+## This program is published under a GPLv2 license
+
+"""
+L2TP (Layer 2 Tunneling Protocol) for VPNs.
+
+[RFC 2661]
+"""
+
+import struct
+
+from scapy.packet import *
+from scapy.fields import *
+from scapy.layers.inet import UDP
+from scapy.layers.ppp import PPP
+
+class L2TP(Packet):
+    fields_desc = [ ShortEnumField("pkt_type",2,{2:"data"}),
+                    ShortField("len", None),
+                    ShortField("tunnel_id", 0),
+                    ShortField("session_id", 0),
+                    ShortField("ns", 0),
+                    ShortField("nr", 0),
+                    ShortField("offset", 0) ]
+
+    def post_build(self, pkt, pay):
+        if self.len is None:
+            l = len(pkt)+len(pay)
+            pkt = pkt[:2]+struct.pack("!H", l)+pkt[4:]
+        return pkt+pay
+
+
+bind_layers( UDP,           L2TP,          sport=1701, dport=1701)
+bind_layers( L2TP,          PPP,           )