diff --git a/__init__.py b/__init__.py
index e821df5..1a7ebdf 100755
--- a/__init__.py
+++ b/__init__.py
@@ -213,9 +213,15 @@ def pp(value, bits=16):
 ##
 ## Codecs
 ##
-
 import codecs
-from __init__ import BitVector
+import string
+
+b64alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+
+def from_b64(s, alphabet, codec='base64'):
+    tr = string.maketrans(alphabet, b64alpha)
+    t = s.translate(tr)
+    return t.decode(codec)
 
 class Esab64Codec(codecs.Codec):
     """Little-endian version of base64."""
diff --git a/ip.py b/ip.py
index 3fc53a4..3197dfa 100755
--- a/ip.py
+++ b/ip.py
@@ -276,7 +276,8 @@ class TCP_Resequence:
                     del pending[key]
                 if frame.flags & (FIN | RST):
                     seq += 1
-                    self.closed[idx] = True
+                if frame.flags & (FIN | ACK) == FIN | ACK:
+                    self.closed[xdi] = True
                     if self.closed == [True, True]:
                         self.handle = self.handle_drop
             if seq != pkt.ack:
@@ -288,8 +289,15 @@ class TCP_Resequence:
     def handle_drop(self, pkt):
         """Warn about any unhandled packets"""
 
+        if pkt.flags & SYN:
+            # Re-using ports!
+            self.__init__()
+            return self.handle(pkt)
+
         if pkt.payload:
             warnings.warn('Spurious frame after shutdown: %r %d' % (pkt, pkt.flags))
+            hexdump(pkt.payload)
+            merf
 
 
 class Dispatch: