def received(self, src, body):
<EOL>self._msgid += <NUM_LIT:1><EOL>message = IncomingMessage(src, body, self._msgid)<EOL>self._traffic.append(message)<EOL>self._receive_message(message)<EOL>return message<EOL>
Simulate an incoming message

            :type src: str
            :param src: Message source
            :type boby: str | unicode
            :param body: Message body
            :rtype: IncomingMessage