neoctl: fix 'print node' command to get list of all nodes

Protocol is extended to allow passing None in an Enum field.

neo/admin/handler.py

@@ -61,9 +61,12 @@ class AdminEventHandler(EventHandler):
 
 
     def askNodeList(self, conn, node_type):
-        neo.lib.logging.info("ask node list for %s" %(node_type))
-        def node_filter(n):
-            return n.getType() is node_type
+        if node_type is None:
+            node_type = 'all'
+            node_filter = None
+        else:
+            node_filter = lambda n: n.getType() is node_type
+        neo.lib.logging.info("ask list of %s nodes", node_type)
         node_list = self.app.nm.getList(node_filter)
         node_information_list = [node.asTuple() for node in node_list ]
         p = Packets.AnswerNodeList(node_information_list)

neo/lib/protocol.py

@@ -281,7 +281,7 @@ class PItem(object):
     def decode(self, reader):
         return self._trace(self._decode, reader)
 
-    def _encode(self, writer):
+    def _encode(self, writer, items):
         raise NotImplementedError, self.__class__.__name__
 
     def _decode(self, reader):
@@ -372,15 +372,20 @@ class PEnum(PStructItem):
         Encapsulate an enumeration value
     """
     def __init__(self, name, enum):
-        PStructItem.__init__(self, name, '!L')
+        PStructItem.__init__(self, name, '!l')
         self._enum = enum
 
     def _encode(self, writer, item):
+        if item is None:
+            item = -1
+        else:
             assert isinstance(item, int), item
         writer(self.pack(item))
 
     def _decode(self, reader):
         code = self.unpack(reader(self.size))[0]
+        if code == -1:
+            return None
         try:
             return self._enum[code]
         except KeyError: