def _new_connection(self, listener, *args):
     socktype = self.socket_types.get(listener, "")
     sock, address = listener.accept()
     if len(self._potential_protocols)>=self._max_connections:
         log.error("too many connections (%s), ignoring new one", len(self._potential_protocols))
         sock.close()
         return  True
     try:
         peername = sock.getpeername()
     except:
         peername = str(address)
     sockname = sock.getsockname()
     target = peername or sockname
     sock.settimeout(self._socket_timeout)
     log("new_connection(%s) sock=%s, sockname=%s, address=%s, peername=%s", args, sock, sockname, address, peername)
     sc = SocketConnection(sock, sockname, address, target, socktype)
     log.info("New connection received: %s", sc)
     protocol = Protocol(self, sc, self.process_packet)
     protocol.large_packets.append("info-response")
     protocol.authenticator = None
     protocol.invalid_header = self.invalid_header
     protocol.receive_aliases.update(self._aliases)
     self._potential_protocols.append(protocol)
     protocol.start()
     self.timeout_add(SOCKET_TIMEOUT*1000, self.verify_connection_accepted, protocol)
     return True

    def run(self):
        log("ProxyProcess.run() pid=%s, uid=%s, gid=%s", os.getpid(), getuid(), getgid())
        setuidgid(self.uid, self.gid)
        if self.env_options:
            #TODO: whitelist env update?
            os.environ.update(self.env_options)
        self.video_init()

        log.info("new proxy instance started")
        log.info(" for client %s", self.client_conn)
        log.info(" and server %s", self.server_conn)

        signal.signal(signal.SIGTERM, self.signal_quit)
        signal.signal(signal.SIGINT, self.signal_quit)
        log("registered signal handler %s", self.signal_quit)

        start_thread(self.server_message_queue, "server message queue")

        if not self.create_control_socket():
            #TODO: should send a message to the client
            return
        self.control_socket_thread = start_thread(self.control_socket_loop, "control")

        self.main_queue = Queue()
        #setup protocol wrappers:
        self.server_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_protocol = Protocol(self, self.client_conn, self.process_client_packet, self.get_client_packet)
        self.client_protocol.restore_state(self.client_state)
        self.server_protocol = Protocol(self, self.server_conn, self.process_server_packet, self.get_server_packet)
        #server connection tweaks:
        self.server_protocol.large_packets.append("draw")
        self.server_protocol.large_packets.append("window-icon")
        self.server_protocol.large_packets.append("keymap-changed")
        self.server_protocol.large_packets.append("server-settings")
        if self.caps.boolget("file-transfer"):
            self.client_protocol.large_packets.append("send-file")
            self.client_protocol.large_packets.append("send-file-chunk")
            self.server_protocol.large_packets.append("send-file")
            self.server_protocol.large_packets.append("send-file-chunk")
        self.server_protocol.set_compression_level(self.session_options.get("compression_level", 0))
        self.server_protocol.enable_default_encoder()

        self.lost_windows = set()
        self.encode_queue = Queue()
        self.encode_thread = start_thread(self.encode_loop, "encode")

        log("starting network threads")
        self.server_protocol.start()
        self.client_protocol.start()

        self.send_hello()
        self.timeout_add(VIDEO_TIMEOUT*1000, self.timeout_video_encoders)

        try:
            self.run_queue()
        except KeyboardInterrupt as e:
            self.stop(str(e))
        finally:
            log("ProxyProcess.run() ending %s", os.getpid())

class SimpleClient(object):

    def init(self, exit_cb, packets=[]):
        self.packets = packets
        sock = socket.socket(socket.AF_UNIX)
        sock.settimeout(5)
        sock.connect(TEST_SOCKFILE)
        sock.settimeout(None)
        sc = makeSocketConnection(sock, "test-client-socket")
        self.protocol = Protocol(gobject, sc, self.process_packet, None)
        self.protocol.start()
        if len(self.packets)>0:
            gobject.timeout_add(1000, self.send_packet)

    def send_packet(self):
        self.protocol.send_now(self.packets[0])
        self.packets = self.packets[1:]
        return len(self.packets)>0

    def process_packet(self, proto, packet):
        log.info("process_packet(%s, %s)", proto, packet)

    def get_packet(self, *args):
        log.info("get_packet(%s)", args)
        return None

 def make_protocol(self):
     #make a connection using the process stdin / stdout
     conn = TwoFileConnection(self.process.stdin, self.process.stdout, abort_test=self.abort_test, target=self.description, socktype=self.description, close_cb=self.subprocess_exit)
     conn.timeout = 0
     protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
     setup_fastencoder_nocompression(protocol)
     protocol.large_packets = self.large_packets
     return protocol

    def run(self):
        debug("ProxyProcess.run() pid=%s, uid=%s, gid=%s", os.getpid(), os.getuid(), os.getgid())
        #change uid and gid:
        if os.getgid()!=self.gid:
            os.setgid(self.gid)
        if os.getuid()!=self.uid:
            os.setuid(self.uid)
        debug("ProxyProcess.run() new uid=%s, gid=%s", os.getuid(), os.getgid())

        if self.env_options:
            #TODO: whitelist env update?
            os.environ.update(self.env_options)

        log.info("new proxy started for client %s and server %s", self.client_conn, self.server_conn)

        signal.signal(signal.SIGTERM, self.signal_quit)
        signal.signal(signal.SIGINT, self.signal_quit)
        debug("registered signal handler %s", self.signal_quit)

        make_daemon_thread(self.server_message_queue, "server message queue").start()

        self.main_queue = Queue()
        #setup protocol wrappers:
        self.server_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_protocol = Protocol(self, self.client_conn, self.process_client_packet, self.get_client_packet)
        self.client_protocol.restore_state(self.client_state)
        self.server_protocol = Protocol(self, self.server_conn, self.process_server_packet, self.get_server_packet)
        #server connection tweaks:
        self.server_protocol.large_packets.append("draw")
        self.server_protocol.large_packets.append("window-icon")
        self.server_protocol.large_packets.append("keymap-changed")
        self.server_protocol.large_packets.append("server-settings")
        self.server_protocol.set_compression_level(self.session_options.get("compression_level", 0))

        self.lost_windows = set()
        self.encode_queue = Queue()
        self.encode_thread = make_daemon_thread(self.encode_loop, "encode")
        self.encode_thread.start()

        debug("starting network threads")
        self.server_protocol.start()
        self.client_protocol.start()

        #forward the hello packet:
        hello_packet = ("hello", self.filter_client_caps(self.caps))
        self.queue_server_packet(hello_packet)

        try:
            try:
                self.run_queue()
            except KeyboardInterrupt, e:
                self.stop(str(e))
        finally:
            debug("ProxyProcess.run() ending %s", os.getpid())

 def make_protocol(self):
     #figure out where we read from and write to:
     if self.input_filename=="-":
         #disable stdin buffering:
         self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
         setbinarymode(self._input.fileno())
     else:
         self._input = open(self.input_filename, 'rb')
     if self.output_filename=="-":
         #disable stdout buffering:
         self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
         setbinarymode(self._output.fileno())
     else:
         self._output = open(self.output_filename, 'wb')
     #stdin and stdout wrapper:
     conn = TwoFileConnection(self._output, self._input, abort_test=None, target=self.name, info=self.name, close_cb=self.net_stop)
     conn.timeout = 0
     protocol = Protocol(gobject, conn, self.process_packet, get_packet_cb=self.get_packet)
     try:
         protocol.enable_encoder("rencode")
     except Exception as e:
         log.warn("failed to enable rencode: %s", e)
         protocol.enable_encoder("bencode")
     protocol.enable_compressor("none")
     protocol.large_packets = self.large_packets
     return protocol

 def setup_connection(self, conn):
     log.debug("setup_connection(%s)", conn)
     self._protocol = Protocol(self.get_scheduler(), conn, self.process_packet, self.next_packet)
     self._protocol.large_packets.append("keymap-changed")
     self._protocol.large_packets.append("server-settings")
     self._protocol.set_compression_level(self.compression_level)
     self.have_more = self._protocol.source_has_more

 def init(self, exit_cb, packets=[]):
     self.packets = packets
     sock = socket.socket(socket.AF_UNIX)
     sock.settimeout(5)
     sock.connect(TEST_SOCKFILE)
     sock.settimeout(None)
     sc = makeSocketConnection(sock, "test-client-socket")
     self.protocol = Protocol(gobject, sc, self.process_packet, None)
     self.protocol.start()
     if len(self.packets)>0:
         gobject.timeout_add(1000, self.send_packet)

 def setup_connection(self, conn):
     log.debug("setup_connection(%s)", conn)
     self._protocol = Protocol(self.get_scheduler(), conn, self.process_packet, self.next_packet)
     self._protocol.large_packets.append("keymap-changed")
     self._protocol.large_packets.append("server-settings")
     self._protocol.set_compression_level(self.compression_level)
     self._protocol.receive_aliases.update(self._aliases)
     self._protocol.enable_default_encoder()
     self._protocol.enable_default_compressor()
     self.have_more = self._protocol.source_has_more
     if conn.timeout>0:
         self.timeout_add((conn.timeout + EXTRA_TIMEOUT) * 1000, self.verify_connected)

 def new_control_connection(self, sock, address):
     if len(self.potential_protocols)>=self.max_connections:
         log.error("too many connections (%s), ignoring new one", len(self.potential_protocols))
         sock.close()
         return  True
     try:
         peername = sock.getpeername()
     except:
         peername = str(address)
     sockname = sock.getsockname()
     target = peername or sockname
     #sock.settimeout(0)
     log("new_control_connection() sock=%s, sockname=%s, address=%s, peername=%s", sock, sockname, address, peername)
     sc = SocketConnection(sock, sockname, address, target, "unix-domain")
     log.info("New proxy instance control connection received: %s", sc)
     protocol = Protocol(self, sc, self.process_control_packet)
     protocol.large_packets.append("info-response")
     self.potential_protocols.append(protocol)
     protocol.start()
     self.timeout_add(SOCKET_TIMEOUT*1000, self.verify_connection_accepted, protocol)
     return True

 def _new_connection(self, listener, *args):
     socktype = self.socket_types.get(listener)
     assert socktype, "cannot find socket type for %s" % listener
     sock, address = listener.accept()
     if len(self._potential_protocols) >= self._max_connections:
         netlog.error("too many connections (%s), ignoring new one", len(self._potential_protocols))
         sock.close()
         return True
     try:
         peername = sock.getpeername()
     except:
         peername = str(address)
     sockname = sock.getsockname()
     target = peername or sockname
     sock.settimeout(self._socket_timeout)
     netlog(
         "new_connection(%s) sock=%s, timeout=%s, sockname=%s, address=%s, peername=%s",
         args,
         sock,
         self._socket_timeout,
         sockname,
         address,
         peername,
     )
     sc = SocketConnection(sock, sockname, address, target, socktype)
     netlog("socket connection: %s", sc)
     frominfo = ""
     if peername:
         frominfo = " from %s" % str(peername)
     netlog.info("New %s connection received%s", socktype, frominfo)
     protocol = Protocol(self, sc, self.process_packet)
     self._potential_protocols.append(protocol)
     protocol.large_packets.append("info-response")
     protocol.challenge_sent = False
     protocol.authenticator = None
     if socktype == "tcp":
         protocol.auth_class = self.tcp_auth_class
     else:
         protocol.auth_class = self.auth_class
     protocol.socket_type = socktype
     protocol.invalid_header = self.invalid_header
     protocol.receive_aliases.update(self._aliases)
     protocol.start()
     self.timeout_add(SOCKET_TIMEOUT * 1000, self.verify_connection_accepted, protocol)
     return True

 def setup_connection(self, conn):
     netlog("setup_connection(%s) timeout=%s", conn, conn.timeout)
     self._protocol = Protocol(self.get_scheduler(), conn, self.process_packet, self.next_packet)
     self._protocol.large_packets.append("keymap-changed")
     self._protocol.large_packets.append("server-settings")
     self._protocol.large_packets.append("logging")
     self._protocol.set_compression_level(self.compression_level)
     self._protocol.receive_aliases.update(self._aliases)
     self._protocol.enable_default_encoder()
     self._protocol.enable_default_compressor()
     if self.encryption and ENCRYPT_FIRST_PACKET:
         key = self.get_encryption_key()
         self._protocol.set_cipher_out(self.encryption, DEFAULT_IV, key, DEFAULT_SALT, DEFAULT_ITERATIONS, INITIAL_PADDING)
     self.have_more = self._protocol.source_has_more
     if conn.timeout>0:
         self.timeout_add((conn.timeout + EXTRA_TIMEOUT) * 1000, self.verify_connected)
     netlog("setup_connection(%s) protocol=%s", conn, self._protocol)

 def new_connection(self, *args):
     log.info("new_connection(%s)", args)
     sock, address = self.listener.accept()
     log.info("new_connection(%s) sock=%s, address=%s", args, sock, address)
     sock.settimeout(None)
     sock.setblocking(1)
     sc = makeSocketConnection(sock, str(address)+"server")
     protocol = Protocol(gobject, sc, self.process_packet)
     protocol.salt = None
     protocol.set_compression_level(1)
     protocol.start()
     return True

 def setup_connection(self, conn):
     netlog("setup_connection(%s) timeout=%s", conn, conn.timeout)
     self._protocol = Protocol(self.get_scheduler(), conn, self.process_packet, self.next_packet)
     self._protocol.large_packets.append("keymap-changed")
     self._protocol.large_packets.append("server-settings")
     self._protocol.large_packets.append("logging")
     self._protocol.set_compression_level(self.compression_level)
     self._protocol.receive_aliases.update(self._aliases)
     self._protocol.enable_default_encoder()
     self._protocol.enable_default_compressor()
     if self.encryption and ENCRYPT_FIRST_PACKET:
         key = self.get_encryption_key()
         self._protocol.set_cipher_out(
             self.encryption, DEFAULT_IV, key, DEFAULT_SALT, DEFAULT_ITERATIONS, INITIAL_PADDING
         )
     self.have_more = self._protocol.source_has_more
     if conn.timeout > 0:
         self.timeout_add((conn.timeout + EXTRA_TIMEOUT) * 1000, self.verify_connected)
     process = getattr(conn, "process", None)  # ie: ssh is handled by anotherprocess
     if process:
         proc, name, command = process
         getChildReaper().add_process(proc, name, command, ignore=True, forget=False)
     netlog("setup_connection(%s) protocol=%s", conn, self._protocol)

#.........这里部分代码省略.........
        pass

    def disconnect_and_quit(self, exit_code, reason):
        #make sure that we set the exit code early,
        #so the protocol shutdown won't set a different one:
        if self.exit_code is None:
            self.exit_code = exit_code
        #try to tell the server we're going, then quit
        log("disconnect_and_quit(%s, %s)", exit_code, reason)
        p = self._protocol
        if p is None or p._closed:
            self.quit(exit_code)
            return
        def protocol_closed():
            log("disconnect_and_quit: protocol_closed()")
            self.idle_add(self.quit, exit_code)
        if p:
            p.flush_then_close(["disconnect", reason], done_callback=protocol_closed)
        self.timeout_add(1000, self.quit, exit_code)

    def exit(self):
        sys.exit()


    def client_type(self):
        #overriden in subclasses!
        return "Python"

    def get_scheduler(self):
        raise NotImplementedError()

    def setup_connection(self, conn):
        netlog("setup_connection(%s) timeout=%s", conn, conn.timeout)
        self._protocol = Protocol(self.get_scheduler(), conn, self.process_packet, self.next_packet)
        self._protocol.large_packets.append("keymap-changed")
        self._protocol.large_packets.append("server-settings")
        self._protocol.large_packets.append("logging")
        self._protocol.set_compression_level(self.compression_level)
        self._protocol.receive_aliases.update(self._aliases)
        self._protocol.enable_default_encoder()
        self._protocol.enable_default_compressor()
        if self.encryption and ENCRYPT_FIRST_PACKET:
            key = self.get_encryption_key()
            self._protocol.set_cipher_out(self.encryption, DEFAULT_IV, key, DEFAULT_SALT, DEFAULT_ITERATIONS, INITIAL_PADDING)
        self.have_more = self._protocol.source_has_more
        if conn.timeout>0:
            self.timeout_add((conn.timeout + EXTRA_TIMEOUT) * 1000, self.verify_connected)
        netlog("setup_connection(%s) protocol=%s", conn, self._protocol)


    def remove_packet_handlers(self, *keys):
        for k in keys:
            for d in (self._packet_handlers, self._ui_packet_handlers):
                try:
                    del d[k]
                except:
                    pass

    def set_packet_handlers(self, to, defs):
        """ configures the given packet handlers,
            and make sure we remove any existing ones with the same key
            (which can be useful for subclasses, not here)
        """
        log("set_packet_handlers(%s, %s)", to, defs)
        self.remove_packet_handlers(*defs.keys())
        for k,v in defs.items():

class XpraClientBase(object):
    """ Base class for Xpra clients.
        Provides the glue code for:
        * sending packets via Protocol
        * handling packets received via _process_packet
        For an actual implementation, look at:
        * GObjectXpraClient
        * xpra.client.gtk2.client
        * xpra.client.gtk3.client
    """

    def __init__(self):
        self.exit_code = None
        self.compression_level = 0
        self.password = None
        self.password_file = None
        self.password_sent = False
        self.encryption = None
        self.quality = -1
        self.min_quality = 0
        self.speed = 0
        self.min_speed = -1
        #protocol stuff:
        self._protocol = None
        self._priority_packets = []
        self._ordinary_packets = []
        self._mouse_position = None
        self._aliases = {}
        self._reverse_aliases = {}
        #server state and caps:
        self.server_capabilities = None
        self._remote_version = None
        self._remote_revision = None
        self._remote_platform = None
        self._remote_platform_release = None
        self._remote_platform_platform = None
        self._remote_platform_linux_distribution = None
        self.make_uuid()
        self.init_packet_handlers()

    def init(self, opts):
        self.compression_level = opts.compression_level
        self.password_file = opts.password_file
        self.encryption = opts.encryption
        self.quality = opts.quality
        self.min_quality = opts.min_quality
        self.speed = opts.speed
        self.min_speed = opts.min_speed

    def timeout_add(self, *args):
        raise Exception("override me!")

    def idle_add(self, *args):
        raise Exception("override me!")

    def source_remove(self, *args):
        raise Exception("override me!")


    def install_signal_handlers(self):
        def deadly_signal(signum, frame):
            sys.stderr.write("\ngot deadly signal %s, exiting\n" % SIGNAMES.get(signum, signum))
            sys.stderr.flush()
            self.cleanup()
            os._exit(128 + signum)
        def app_signal(signum, frame):
            sys.stderr.write("\ngot signal %s, exiting\n" % SIGNAMES.get(signum, signum))
            sys.stderr.flush()
            signal.signal(signal.SIGINT, deadly_signal)
            signal.signal(signal.SIGTERM, deadly_signal)
            self.timeout_add(0, self.quit, 128 + signum)
        signal.signal(signal.SIGINT, app_signal)
        signal.signal(signal.SIGTERM, app_signal)


    def client_type(self):
        #overriden in subclasses!
        return "Python"

    def setup_connection(self, conn):
        log.debug("setup_connection(%s)", conn)
        self._protocol = Protocol(conn, self.process_packet, self.next_packet)
        self._protocol.large_packets.append("keymap-changed")
        self._protocol.large_packets.append("server-settings")
        self._protocol.set_compression_level(self.compression_level)
        self.have_more = self._protocol.source_has_more

    def init_packet_handlers(self):
        self._packet_handlers = {
            "hello": self._process_hello,
            }
        self._ui_packet_handlers = {
            "challenge": self._process_challenge,
            "disconnect": self._process_disconnect,
            "set_deflate": self._process_set_deflate,
            Protocol.CONNECTION_LOST: self._process_connection_lost,
            Protocol.GIBBERISH: self._process_gibberish,
            }

    def init_aliases(self):
#.........这里部分代码省略.........

def loopback_protocol(process_packet_cb, get_packet_cb):
    conn = loopback_connection("fake", "fake")
    protocol = Protocol(gobject, conn, process_packet_cb, get_packet_cb=get_packet_cb)
    protocol.enable_encoder("rencode")
    protocol.enable_compressor("none")
    return protocol

 def _new_connection(self, listener, *args):
     if self._closing:
         netlog.warn("ignoring new connection during shutdown")
         return False
     socktype = self.socket_types.get(listener)
     assert socktype, "cannot find socket type for %s" % listener
     sock, address = listener.accept()
     if len(self._potential_protocols)>=self._max_connections:
         netlog.error("too many connections (%s), ignoring new one", len(self._potential_protocols))
         sock.close()
         return True
     try:
         peername = sock.getpeername()
     except:
         peername = str(address)
     sockname = sock.getsockname()
     target = peername or sockname
     sock.settimeout(self._socket_timeout)
     netlog("new_connection(%s) sock=%s, timeout=%s, sockname=%s, address=%s, peername=%s", args, sock, self._socket_timeout, sockname, address, peername)
     sc = SocketConnection(sock, sockname, address, target, socktype)
     netlog("socket connection: %s", sc)
     frominfo = ""
     if peername:
         frominfo = " from %s" % pretty_socket(peername)
     elif socktype=="unix-domain":
         frominfo = " on %s" % sockname
     netlog.info("New %s connection received%s", socktype, frominfo)
     protocol = Protocol(self, sc, self.process_packet)
     self._potential_protocols.append(protocol)
     protocol.large_packets.append("info-response")
     protocol.challenge_sent = False
     protocol.authenticator = None
     if socktype=="tcp":
         protocol.auth_class = self.tcp_auth_class
         protocol.encryption = self.tcp_encryption
         protocol.keyfile = self.tcp_encryption_keyfile
     else:
         protocol.auth_class = self.auth_class
         protocol.encryption = self.encryption
         protocol.keyfile = self.encryption_keyfile
     protocol.socket_type = socktype
     protocol.invalid_header = self.invalid_header
     protocol.receive_aliases.update(self._aliases)
     authlog("socktype=%s, auth class=%s, encryption=%s, keyfile=%s", socktype, protocol.auth_class, protocol.encryption, protocol.keyfile)
     if protocol.encryption and ENCRYPT_FIRST_PACKET:
         password = self.get_encryption_key(None, protocol.keyfile)
         protocol.set_cipher_in(protocol.encryption, DEFAULT_IV, password, DEFAULT_SALT, DEFAULT_ITERATIONS, INITIAL_PADDING)
     protocol.start()
     self.timeout_add(SOCKET_TIMEOUT*1000, self.verify_connection_accepted, protocol)
     return True

class ProxyInstanceProcess(Process):

    def __init__(self, uid, gid, env_options, session_options, client_conn, client_state, cipher, encryption_key, server_conn, caps, message_queue):
        Process.__init__(self, name=str(client_conn))
        self.uid = uid
        self.gid = gid
        self.env_options = env_options
        self.session_options = self.sanitize_session_options(session_options)
        self.client_conn = client_conn
        self.client_state = client_state
        self.cipher = cipher
        self.encryption_key = encryption_key
        self.server_conn = server_conn
        self.caps = caps
        debug("ProxyProcess%s", (uid, gid, client_conn, client_state, cipher, encryption_key, server_conn, "{..}"))
        self.client_protocol = None
        self.server_protocol = None
        self.main_queue = None
        self.message_queue = message_queue
        self.video_encoder_types = ["nvenc", "x264"]
        self.video_encoders = {}
        self.video_helper = None

    def server_message_queue(self):
        while True:
            log.info("waiting for server message on %s", self.message_queue)
            m = self.message_queue.get()
            log.info("proxy server message: %s", m)
            if m=="stop":
                self.stop("proxy server request")
                return

    def signal_quit(self, signum, frame):
        log.info("")
        log.info("proxy process pid %s got signal %s, exiting", os.getpid(), SIGNAMES.get(signum, signum))
        signal.signal(signal.SIGINT, deadly_signal)
        signal.signal(signal.SIGTERM, deadly_signal)
        self.stop(SIGNAMES.get(signum, signum))

    def idle_add(self, fn, *args, **kwargs):
        #we emulate gobject's idle_add using a simple queue
        self.main_queue.put((fn, args, kwargs))

    def timeout_add(self, timeout, fn, *args, **kwargs):
        #emulate gobject's timeout_add using idle add and a Timer
        #using custom functions to cancel() the timer when needed
        timer = None
        def idle_exec():
            v = fn(*args, **kwargs)
            if not bool(v):
                timer.cancel()
            return False
        def timer_exec():
            #just run via idle_add:
            self.idle_add(idle_exec)
        timer = Timer(timeout*1000.0, timer_exec)
        timer.start()

    def run(self):
        debug("ProxyProcess.run() pid=%s, uid=%s, gid=%s", os.getpid(), os.getuid(), os.getgid())
        #change uid and gid:
        if os.getgid()!=self.gid:
            os.setgid(self.gid)
        if os.getuid()!=self.uid:
            os.setuid(self.uid)
        debug("ProxyProcess.run() new uid=%s, gid=%s", os.getuid(), os.getgid())

        if self.env_options:
            #TODO: whitelist env update?
            os.environ.update(self.env_options)

        log.info("new proxy started for client %s and server %s", self.client_conn, self.server_conn)

        signal.signal(signal.SIGTERM, self.signal_quit)
        signal.signal(signal.SIGINT, self.signal_quit)
        debug("registered signal handler %s", self.signal_quit)

        make_daemon_thread(self.server_message_queue, "server message queue").start()

        self.main_queue = Queue()
        #setup protocol wrappers:
        self.server_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_protocol = Protocol(self, self.client_conn, self.process_client_packet, self.get_client_packet)
        self.client_protocol.restore_state(self.client_state)
        self.server_protocol = Protocol(self, self.server_conn, self.process_server_packet, self.get_server_packet)
        #server connection tweaks:
        self.server_protocol.large_packets.append("draw")
        self.server_protocol.large_packets.append("keymap-changed")
        self.server_protocol.large_packets.append("server-settings")
        self.server_protocol.set_compression_level(self.session_options.get("compression_level", 0))

        debug("starting network threads")
        self.server_protocol.start()
        self.client_protocol.start()

        #forward the hello packet:
        hello_packet = ("hello", self.filter_client_caps(self.caps))
        self.queue_server_packet(hello_packet)

#.........这里部分代码省略.........

#.........这里部分代码省略.........
            self.idle_add(idle_exec)
        Timer(timeout/1000.0, timer_exec).start()

    def run(self):
        log("ProxyProcess.run() pid=%s, uid=%s, gid=%s", os.getpid(), os.getuid(), os.getgid())
        #change uid and gid:
        if os.getgid()!=self.gid:
            os.setgid(self.gid)
        if os.getuid()!=self.uid:
            os.setuid(self.uid)
        log("ProxyProcess.run() new uid=%s, gid=%s", os.getuid(), os.getgid())

        if self.env_options:
            #TODO: whitelist env update?
            os.environ.update(self.env_options)
        self.video_init()

        log.info("new proxy started for client %s and server %s", self.client_conn, self.server_conn)

        signal.signal(signal.SIGTERM, self.signal_quit)
        signal.signal(signal.SIGINT, self.signal_quit)
        log("registered signal handler %s", self.signal_quit)

        make_daemon_thread(self.server_message_queue, "server message queue").start()

        if self.create_control_socket():
            self.control_socket_thread = make_daemon_thread(self.control_socket_loop, "control")
            self.control_socket_thread.start()

        self.main_queue = Queue()
        #setup protocol wrappers:
        self.server_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_packets = Queue(PROXY_QUEUE_SIZE)
        self.client_protocol = Protocol(self, self.client_conn, self.process_client_packet, self.get_client_packet)
        self.client_protocol.restore_state(self.client_state)
        self.server_protocol = Protocol(self, self.server_conn, self.process_server_packet, self.get_server_packet)
        #server connection tweaks:
        self.server_protocol.large_packets.append("draw")
        self.server_protocol.large_packets.append("window-icon")
        self.server_protocol.large_packets.append("keymap-changed")
        self.server_protocol.large_packets.append("server-settings")
        self.server_protocol.set_compression_level(self.session_options.get("compression_level", 0))
        self.server_protocol.enable_default_encoder()

        self.lost_windows = set()
        self.encode_queue = Queue()
        self.encode_thread = make_daemon_thread(self.encode_loop, "encode")
        self.encode_thread.start()

        log("starting network threads")
        self.server_protocol.start()
        self.client_protocol.start()

        #forward the hello packet:
        hello_packet = ("hello", self.filter_client_caps(self.caps))
        self.queue_server_packet(hello_packet)
        self.timeout_add(VIDEO_TIMEOUT*1000, self.timeout_video_encoders)

        try:
            try:
                self.run_queue()
            except KeyboardInterrupt, e:
                self.stop(str(e))
        finally:
            log("ProxyProcess.run() ending %s", os.getpid())