netpycos.py 文件源码

def _udp_proc(self, location, addrinfo, task=None):
        """
        Internal use only.
        """
        task.set_daemon()
        sock = addrinfo.udp_sock
        while 1:
            msg, addr = yield sock.recvfrom(1024)
            if not msg.startswith('ping:'):
                logger.warning('ignoring UDP message from %s:%s', addr[0], addr[1])
                continue
            try:
                ping_info = deserialize(msg[len('ping:'):])
            except:
                continue
            peer_location = ping_info.get('location', None)
            if not isinstance(peer_location, Location) or peer_location in self._locations:
                continue
            if ping_info['version'] != __version__:
                logger.warning('Peer %s version %s is not %s',
                               peer_location, ping_info['version'], __version__)
                continue
            if self._ignore_peers:
                continue
            if self._secret is None:
                auth_code = None
            else:
                auth_code = ping_info.get('signature', '') + self._secret
                auth_code = hashlib.sha1(auth_code.encode()).hexdigest()
            _Peer._lock.acquire()
            peer = _Peer.peers.get((peer_location.addr, peer_location.port), None)
            _Peer._lock.release()
            if peer and peer.auth != auth_code:
                _Peer.remove(peer_location)
                peer = None

            if not peer:
                SysTask(self._acquaint_, peer_location, ping_info['signature'], addrinfo)