Pushed Stateless progress (along with Packet Builder module)

1 files changed, 45 insertions, 0 deletions

diff --git a/scripts/external_libs/dpkt-1.8.6/dpkt/stun.py b/scripts/external_libs/dpkt-1.8.6/dpkt/stun.py
new file mode 100644
index 00000000..5706f0ef
--- /dev/null
+++ b/scripts/external_libs/dpkt-1.8.6/dpkt/stun.py
@@ -0,0 +1,45 @@
+# $Id: stun.py 47 2008-05-27 02:10:00Z jon.oberheide $
+
+"""Simple Traversal of UDP through NAT."""
+
+import struct
+import dpkt
+
+# STUN - RFC 3489
+# http://tools.ietf.org/html/rfc3489
+# Each packet has a 20 byte header followed by 0 or more attribute TLVs.
+
+# Message Types
+BINDING_REQUEST			= 0x0001
+BINDING_RESPONSE		= 0x0101
+BINDING_ERROR_RESPONSE		= 0x0111
+SHARED_SECRET_REQUEST		= 0x0002
+SHARED_SECRET_RESPONSE		= 0x0102
+SHARED_SECRET_ERROR_RESPONSE	= 0x0112
+
+# Message Attributes
+MAPPED_ADDRESS			= 0x0001
+RESPONSE_ADDRESS		= 0x0002
+CHANGE_REQUEST			= 0x0003
+SOURCE_ADDRESS			= 0x0004
+CHANGED_ADDRESS			= 0x0005
+USERNAME			= 0x0006
+PASSWORD			= 0x0007
+MESSAGE_INTEGRITY		= 0x0008
+ERROR_CODE			= 0x0009
+UNKNOWN_ATTRIBUTES		= 0x000a
+REFLECTED_FROM			= 0x000b
+
+class STUN(dpkt.Packet):
+    __hdr__ = (
+        ('type', 'H', 0),
+        ('len', 'H', 0),
+        ('xid', '16s', 0)
+        )
+
+def tlv(buf):
+    n = 4
+    t, l = struct.unpack('>HH', buf[:n])
+    v = buf[n:n+l]
+    buf = buf[n+l:]
+    return (t,l,v, buf)