docs: def conn_log_graph(self, stream):
          ''' Build up a graph (nodes and edges from a Bro conn.log) '''
          conn_log = list(stream)
          print 'Entering conn_log_graph...(%d rows)' % len(conn_log)
          for row in stream:
  
              # Add the connection id with service as one of the labels
              self.add_node(row['uid'], row['uid'][:6], ['conn_id', row['service']])
  
              # Add the originating host
              self.add_node(row['id.orig_h'], row['id.orig_h'], ['ip', 'origin'])
  
              # Add the response host
              self.add_node(row['id.resp_h'], row['id.resp_h'], ['ip', 'response'])
  
              # Add the ip->connection relationships
              self.add_rel(row['uid'], row['id.orig_h'], 'origin')
              self.add_rel(row['uid'], row['id.resp_h'], 'response')