1 files changed, 31 insertions, 0 deletions
diff --git a/scripts/external_libs/dpkt-1.8.6/dpkt/ah.py b/scripts/external_libs/dpkt-1.8.6/dpkt/ah.py
new file mode 100644
index 00000000..87def27e
--- /dev/null
+++ b/scripts/external_libs/dpkt-1.8.6/dpkt/ah.py
@@ -0,0 +1,31 @@
+# $Id: ah.py 34 2007-01-28 07:54:20Z dugsong $
+
+"""Authentication Header."""
+
+import dpkt
+
+class AH(dpkt.Packet):
+    __hdr__ = (
+        ('nxt', 'B', 0),
+        ('len', 'B', 0),	# payload length
+        ('rsvd', 'H', 0),
+        ('spi', 'I', 0),
+        ('seq', 'I', 0)
+        )
+    auth = ''
+    def unpack(self, buf):
+        dpkt.Packet.unpack(self, buf)
+        self.auth = self.data[:self.len]
+        buf = self.data[self.len:]
+        import ip
+        try:
+            self.data = ip.IP.get_proto(self.nxt)(buf)
+            setattr(self, self.data.__class__.__name__.lower(), self.data)
+        except (KeyError, dpkt.UnpackError):
+            self.data = buf
+
+    def __len__(self):
+        return self.__hdr_len__ + len(self.auth) + len(self.data)
+
+    def __str__(self):
+        return self.pack_hdr() + str(self.auth) + str(self.data)