1 files changed, 84 insertions, 0 deletions
diff --git a/scripts/external_libs/dpkt-1.8.6/dpkt/rip.py b/scripts/external_libs/dpkt-1.8.6/dpkt/rip.py
new file mode 100644
index 00000000..7542cb3d
--- /dev/null
+++ b/scripts/external_libs/dpkt-1.8.6/dpkt/rip.py
@@ -0,0 +1,84 @@
+# $Id: rip.py 23 2006-11-08 15:45:33Z dugsong $
+
+"""Routing Information Protocol."""
+
+import dpkt
+
+# RIP v2 - RFC 2453
+# http://tools.ietf.org/html/rfc2453
+
+REQUEST = 1
+RESPONSE = 2
+
+class RIP(dpkt.Packet):
+    __hdr__ = (
+        ('cmd', 'B', REQUEST),
+        ('v', 'B', 2),
+        ('rsvd', 'H', 0)
+        )
+
+    def unpack(self, buf):
+        dpkt.Packet.unpack(self, buf)
+        l = []
+        self.auth = None
+        while self.data:
+            rte = RTE(self.data[:20])
+            if rte.family == 0xFFFF:
+                self.auth = Auth(self.data[:20])
+            else:
+                l.append(rte)
+            self.data = self.data[20:]
+        self.data = self.rtes = l
+
+    def __len__(self):
+        len = self.__hdr_len__
+        if self.auth:
+            len += len(self.auth)
+        len += sum(map(len, self.rtes))
+        return len
+
+    def __str__(self):
+        auth = ''
+        if self.auth:
+            auth = str(self.auth)
+        return self.pack_hdr() + \
+               auth + \
+               ''.join(map(str, self.rtes))
+
+class RTE(dpkt.Packet):
+    __hdr__ = (
+        ('family', 'H', 2),
+        ('route_tag', 'H', 0),
+        ('addr', 'I', 0),
+        ('subnet', 'I', 0),
+        ('next_hop', 'I', 0),
+        ('metric', 'I', 1)
+        )
+
+class Auth(dpkt.Packet):
+    __hdr__ = (
+        ('rsvd', 'H', 0xFFFF),
+        ('type', 'H', 2),
+        ('auth', '16s', 0)
+        )
+
+if __name__ == '__main__':
+    import unittest
+
+    class RIPTestCase(unittest.TestCase):
+        def testPack(self):
+            r = RIP(self.s)
+            self.failUnless(self.s == str(r))
+
+        def testUnpack(self):
+            r = RIP(self.s)
+            self.failUnless(r.auth == None)
+            self.failUnless(len(r.rtes) == 2)
+
+            rte = r.rtes[1]
+            self.failUnless(rte.family == 2)
+            self.failUnless(rte.route_tag == 0)
+            self.failUnless(rte.metric == 1)
+
+        s = '\x02\x02\x00\x00\x00\x02\x00\x00\x01\x02\x03\x00\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x02\x00\x00\xc0\xa8\x01\x08\xff\xff\xff\xfc\x00\x00\x00\x00\x00\x00\x00\x01'
+    unittest.main()