Python Network.stop方法代码示例

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkServer(util.DaemonThread):

    def __init__(self, config):
        util.DaemonThread.__init__(self)
        self.debug = False
        self.config = config
        self.pipe = util.QueuePipe()
        self.network = Network(self.pipe, config)
        self.lock = threading.RLock()
        # each GUI is a client of the daemon
        self.clients = []
        self.request_id = 0
        self.requests = {}

    def add_client(self, client):
        for key in ['status', 'banner', 'updated', 'servers', 'interfaces']:
            value = self.network.get_status_value(key)
            client.response_queue.put({'method':'network.status', 'params':[key, value]})
        with self.lock:
            self.clients.append(client)
            print_error("new client:", len(self.clients))

    def remove_client(self, client):
        with self.lock:
            self.clients.remove(client)
            print_error("client quit:", len(self.clients))

    def send_request(self, client, request):
        with self.lock:
            self.request_id += 1
            self.requests[self.request_id] = (request['id'], client)
            request['id'] = self.request_id
        if self.debug:
            print_error("-->", request)
        self.pipe.send(request)

    def run(self):
        self.network.start()
        while self.is_running():
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if self.debug:
                print_error("<--", response)
            response_id = response.get('id')
            if response_id:
                with self.lock:
                    client_id, client = self.requests.pop(response_id)
                response['id'] = client_id
                client.response_queue.put(response)
            else:
                # notification
                m = response.get('method')
                v = response.get('params')
                for client in self.clients:
                    if m == 'network.status' or v in client.subscriptions.get(m, []):
                        client.response_queue.put(response)
        self.network.stop()
        print_error("server exiting")

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkServer(threading.Thread):

    def __init__(self, config):
        threading.Thread.__init__(self)
        self.daemon = True
        self.config = config
        self.network = Network(config)
        # network sends responses on that queue
        self.network_queue = Queue.Queue()

        self.running = False
        self.lock = threading.RLock()

        # each GUI is a client of the daemon
        self.clients = []
        # todo: the daemon needs to know which client subscribed to which address

    def is_running(self):
        with self.lock:
            return self.running

    def stop(self):
        with self.lock:
            self.running = False

    def start(self):
        self.running = True
        threading.Thread.start(self)

    def add_client(self, client):
        for key in ['status','banner','updated','servers','interfaces']:
            value = self.network.get_status_value(key)
            client.daemon_pipe.get_queue.put({'method':'network.status', 'params':[key, value]})
        with self.lock:
            self.clients.append(client)

    def remove_client(self, client):
        with self.lock:
            self.clients.remove(client)
        print_error("client quit:", len(self.clients))

    def run(self):
        self.network.start(self.network_queue)
        while self.is_running():
            try:
                response = self.network_queue.get(timeout=0.1)
            except Queue.Empty:
                continue
            for client in self.clients:
                client.daemon_pipe.get_queue.put(response)

        self.network.stop()
        print_error("server exiting")

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
    def test_connect(self):
        port1 = random.randint(20000, 30000)
        port2 = random.randint(20000, 30000)
        n1 = Network(port1)
        n2 = Network(port2)
        n1.start()
        n2.start()
        time.sleep(WAIT_TIME)

        m = 'hasdgbaeswbjf'
        n2.set_clipboard(m)
        time.sleep(WAIT_TIME)

        n1.connect('localhost', port2)
        time.sleep(WAIT_TIME)

        self.assertEqual(m, n1.get_clipboard())

        n1.stop()
        n2.stop()

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkServer(threading.Thread):

    def __init__(self, config):
        threading.Thread.__init__(self)
        self.daemon = True
        self.debug = False
        self.config = config
        self.network = Network(config)
        # network sends responses on that queue
        self.network_queue = Queue.Queue()

        self.running = False
        self.lock = threading.RLock()

        # each GUI is a client of the daemon
        self.clients = []
        self.request_id = 0
        self.requests = {}

    def is_running(self):
        with self.lock:
            return self.running

    def stop(self):
        with self.lock:
            self.running = False

    def start(self):
        self.running = True
        threading.Thread.start(self)

    def add_client(self, client):
        for key in ['status','banner','updated','servers','interfaces']:
            value = self.network.get_status_value(key)
            client.response_queue.put({'method':'network.status', 'params':[key, value]})
        with self.lock:
            self.clients.append(client)
            print_error("new client:", len(self.clients))

    def remove_client(self, client):
        with self.lock:
            self.clients.remove(client)
            print_error("client quit:", len(self.clients))

    def send_request(self, client, request):
        with self.lock:
            self.request_id += 1
            self.requests[self.request_id] = (request['id'], client)
            request['id'] = self.request_id

        if self.debug:
            print_error("-->", request)
        self.network.requests_queue.put(request)


    def run(self):
        self.network.start(self.network_queue)
        while self.is_running():
            try:
                response = self.network_queue.get(timeout=0.1)
            except Queue.Empty:
                continue
            if self.debug:
                print_error("<--", response)
            response_id = response.get('id')
            if response_id:
                with self.lock:
                    client_id, client = self.requests.pop(response_id)
                response['id'] = client_id
                client.response_queue.put(response)
            else:
                # notification
                for client in self.clients:
                    client.response_queue.put(response)

        self.network.stop()
        print_error("server exiting")

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkProxy(threading.Thread):

    def __init__(self, socket, config=None):

        if config is None:
            config = {}  # Do not use mutables as default arguments!
        threading.Thread.__init__(self)
        self.config = SimpleConfig(config) if type(config) == type({}) else config
        self.message_id = 0
        self.unanswered_requests = {}
        self.subscriptions = {}
        self.debug = False
        self.lock = threading.Lock()
        self.pending_transactions_for_notifications = []
        self.callbacks = {}
        self.running = True
        self.daemon = True

        if socket:
            self.pipe = util.SocketPipe(socket)
            self.network = None
        else:
            self.network = Network(config)
            self.pipe = util.QueuePipe(send_queue=self.network.requests_queue)
            self.network.start(self.pipe.get_queue)
            for key in ['status', 'banner', 'updated', 'servers', 'interfaces']:
                value = self.network.get_status_value(key)
                self.pipe.get_queue.put({'method': 'network.status', 'params': [key, value]})

        # status variables
        self.status = 'connecting'
        self.servers = {}
        self.banner = ''
        self.blockchain_height = 0
        self.server_height = 0
        self.interfaces = []

    def is_running(self):
        return self.running

    def run(self):
        while self.is_running():
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if response is None:
                break
            self.process(response)

        self.trigger_callback('stop')
        if self.network:
            self.network.stop()
        print_error("NetworkProxy: terminating")

    def process(self, response):
        if self.debug: 
            print_error("<--", response)

        if response.get('method') == 'network.status':
            key, value = response.get('params')
            if key == 'status':
                self.status = value
            elif key == 'banner':
                self.banner = value
            elif key == 'updated':
                self.blockchain_height, self.server_height = value
            elif key == 'servers':
                self.servers = value
            elif key == 'interfaces':
                self.interfaces = value
            self.trigger_callback(key)
            return

        msg_id = response.get('id')
        result = response.get('result')
        error = response.get('error')
        if msg_id is not None:
            with self.lock:
                method, params, callback = self.unanswered_requests.pop(msg_id)
        else:
            method = response.get('method')
            params = response.get('params')
            with self.lock:
                for k, v in self.subscriptions.items():
                    if (method, params) in v:
                        callback = k
                        break
                else:
                    print_error("received unexpected notification", method, params)
                    return

        r = {'method':method, 'params':params, 'result':result, 'id':msg_id, 'error':error}
        callback(r)

    def send(self, messages, callback):
        """return the ids of the requests that we sent"""

        # detect subscriptions
        sub = []
#.........这里部分代码省略.........

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkProxy(util.DaemonThread):

    def __init__(self, socket, config=None):

        if config is None:
            config = {}  # Do not use mutables as default arguments!
        util.DaemonThread.__init__(self)
        self.config = SimpleConfig(config) if type(config) == type({}) else config
        self.message_id = 0
        self.unanswered_requests = {}
        self.subscriptions = {}
        self.debug = False
        self.lock = threading.Lock()
        self.callbacks = {}

        if socket:
            self.pipe = util.SocketPipe(socket)
            self.network = None
        else:
            self.pipe = util.QueuePipe()
            self.network = Network(self.pipe, config)
            self.network.start()
            for key in ['fee','status','banner','updated','servers','interfaces']:
                value = self.network.get_status_value(key)
                self.pipe.get_queue.put({'method':'network.status', 'params':[key, value]})

        # status variables
        self.status = 'unknown'
        self.servers = {}
        self.banner = ''
        self.blockchain_height = 0
        self.server_height = 0
        self.interfaces = []
        # value returned by estimatefee
        self.fee = None


    def run(self):
        while self.is_running():
            self.run_jobs()    # Synchronizer and Verifier
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if response is None:
                break
            # Protect against ill-formed or malicious server responses
            try:
                self.process(response)
            except:
                traceback.print_exc(file=sys.stderr)
        self.trigger_callback('stop')
        if self.network:
            self.network.stop()
        self.print_error("stopped")

    def process(self, response):
        if self.debug:
            self.print_error("<--", response)

        if response.get('method') == 'network.status':
            key, value = response.get('params')
            if key == 'status':
                self.status = value
            elif key == 'banner':
                self.banner = value
            elif key == 'fee':
                self.fee = value
            elif key == 'updated':
                self.blockchain_height, self.server_height = value
            elif key == 'servers':
                self.servers = value
            elif key == 'interfaces':
                self.interfaces = value
            if key in ['status', 'updated']:
                self.trigger_callback(key)
            else:
                self.trigger_callback(key, (value,))
            return

        msg_id = response.get('id')
        result = response.get('result')
        error = response.get('error')
        if msg_id is not None:
            with self.lock:
                method, params, callback = self.unanswered_requests.pop(msg_id)
        else:
            method = response.get('method')
            params = response.get('params')
            with self.lock:
                for k,v in self.subscriptions.items():
                    if (method, params) in v:
                        callback = k
                        break
                else:
                    self.print_error("received unexpected notification",
                                     method, params)
                    return

        r = {'method':method, 'params':params, 'result':result,
#.........这里部分代码省略.........

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
    # scapy basic configuration...
    bind_layers(UDP,BOOTP,sport=BOOTPS)
    conf.verb = 0 

    startTime = time.time()
    print "Simulation Start Time : ", time.ctime()
    simulator = Simulator()
    network = Network(simQueue=signalQueue)
    network.launch()
    
    
    #timerEvent.run()
    simulator.run()

    simuTime = time.time() - startTime
    print "Time Elapsed while Simulation :%.3f " % (simuTime)
    print "Stopping network...."
    network.stop()











    sys.exit(0)

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkProxy(util.DaemonThread):
    def __init__(self, socket, config=None):

        if config is None:
            config = {}  # Do not use mutables as default arguments!
        util.DaemonThread.__init__(self)
        self.config = SimpleConfig(config) if type(config) == type({}) else config
        self.message_id = 0
        self.unanswered_requests = {}
        self.subscriptions = {}
        self.debug = False
        self.lock = threading.Lock()
        self.callbacks = {}

        if socket:
            self.pipe = util.SocketPipe(socket)
            self.network = None
        else:
            self.pipe = util.QueuePipe()
            self.network = Network(self.pipe, config)
            self.network.start()
            for key in ["fee", "status", "banner", "updated", "servers", "interfaces"]:
                value = self.network.get_status_value(key)
                self.pipe.get_queue.put({"method": "network.status", "params": [key, value]})

        # status variables
        self.status = "unknown"
        self.servers = {}
        self.banner = ""
        self.blockchain_height = 0
        self.server_height = 0
        self.interfaces = []
        self.jobs = []
        # value returned by estimatefee
        self.fee = None

    def run(self):
        while self.is_running():
            for job in self.jobs:
                job()
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if response is None:
                break
            self.process(response)
        self.trigger_callback("stop")
        if self.network:
            self.network.stop()
        self.print_error("stopped")

    def process(self, response):
        if self.debug:
            print_error("<--", response)

        if response.get("method") == "network.status":
            key, value = response.get("params")
            if key == "status":
                self.status = value
            elif key == "banner":
                self.banner = value
            elif key == "fee":
                self.fee = value
            elif key == "updated":
                self.blockchain_height, self.server_height = value
            elif key == "servers":
                self.servers = value
            elif key == "interfaces":
                self.interfaces = value
            if key in ["status", "updated"]:
                self.trigger_callback(key)
            else:
                self.trigger_callback(key, (value,))
            return

        msg_id = response.get("id")
        result = response.get("result")
        error = response.get("error")
        if msg_id is not None:
            with self.lock:
                method, params, callback = self.unanswered_requests.pop(msg_id)
        else:
            method = response.get("method")
            params = response.get("params")
            with self.lock:
                for k, v in self.subscriptions.items():
                    if (method, params) in v:
                        callback = k
                        break
                else:
                    print_error("received unexpected notification", method, params)
                    return

        r = {"method": method, "params": params, "result": result, "id": msg_id, "error": error}
        callback(r)

    def send(self, messages, callback):
        """return the ids of the requests that we sent"""

#.........这里部分代码省略.........

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class TestSimple(unittest.TestCase):
    def setUp(self):
        self.port1 = random.randint(20000, 30000)
        self.port2 = random.randint(20000, 30000)
        self.n1 = Network(self.port1)
        self.n2 = Network(self.port2)
        self.n1.start()
        self.n2.start()

        # give everything time to get going
        time.sleep(WAIT_TIME)

        # establish connection
        self.n2.connect('localhost', self.port1)
        time.sleep(WAIT_TIME)

    # test simple clipboard syncing
    def test_simple(self):
        m1 = 'test 1'
        self.n2.set_clipboard(m1)
        time.sleep(WAIT_TIME)

        self.assertEqual(self.n1.get_clipboard(), m1)

        m2 = 'test 2'
        self.n1.set_clipboard(m2)
        time.sleep(WAIT_TIME)

        self.assertEqual(self.n2.get_clipboard(), m2)

    def test_disconnect_from_client(self):
        self.n2.set_clipboard('test')
        time.sleep(WAIT_TIME)
        self.assertEqual(self.n1.get_clipboard(), 'test')

        self.n2.disconnect('localhost')
        time.sleep(WAIT_TIME)

        m = "test %d" % random.randint(0, 1000)
        self.n2.set_clipboard(m)
        time.sleep(WAIT_TIME)

        self.assertNotEqual(self.n1.get_clipboard(), m)

    def test_disconnect_from_server(self):
        self.n2.set_clipboard('test')
        time.sleep(WAIT_TIME)
        self.assertEqual(self.n1.get_clipboard(), 'test')

        self.n1.disconnect('localhost')
        time.sleep(WAIT_TIME)

        m = "test %d" % random.randint(0, 1000)
        self.n2.set_clipboard(m)
        time.sleep(WAIT_TIME)

        self.assertNotEqual(self.n1.get_clipboard(), m)

    def test_reconnect(self):
        self.n2.disconnect('localhost')
        time.sleep(WAIT_TIME)
        self.n1.connect('localhost', self.port2)
        time.sleep(WAIT_TIME)

        self.n1.set_clipboard('asdf 5')
        time.sleep(WAIT_TIME)
        self.assertEqual(self.n2.get_clipboard(), 'asdf 5')

    def tearDown(self):
        # give it enough time to execute before tearing down
        time.sleep(WAIT_TIME)
        self.n1.stop()
        self.n2.stop()

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class Daemon(DaemonThread):
    def __init__(self, config, fd):

        DaemonThread.__init__(self)
        self.config = config
        if config.get("offline"):
            self.network = None
        else:
            self.network = Network(config)
            self.network.start()
        self.gui = None
        self.wallets = {}
        # Setup server
        cmd_runner = Commands(self.config, None, self.network)
        host = config.get("rpchost", "localhost")
        port = config.get("rpcport", 0)
        server = SimpleJSONRPCServer((host, port), logRequests=False, requestHandler=RequestHandler)
        os.write(fd, repr((server.socket.getsockname(), time.time())))
        os.close(fd)
        server.timeout = 0.1
        for cmdname in known_commands:
            server.register_function(getattr(cmd_runner, cmdname), cmdname)
        server.register_function(self.run_cmdline, "run_cmdline")
        server.register_function(self.ping, "ping")
        server.register_function(self.run_daemon, "daemon")
        server.register_function(self.run_gui, "gui")
        self.server = server

    def ping(self):
        return True

    def run_daemon(self, config):
        sub = config.get("subcommand")
        assert sub in ["start", "stop", "status"]
        if sub == "start":
            response = "Daemon already running"
        elif sub == "status":
            if self.network:
                p = self.network.get_parameters()
                response = {
                    "path": self.network.config.path,
                    "server": p[0],
                    "blockchain_height": self.network.get_local_height(),
                    "server_height": self.network.get_server_height(),
                    "nodes": self.network.get_interfaces(),
                    "connected": self.network.is_connected(),
                    "auto_connect": p[4],
                    "wallets": {k: w.is_up_to_date() for k, w in self.wallets.items()},
                }
            else:
                response = "Daemon offline"
        elif sub == "stop":
            self.stop()
            response = "Daemon stopped"
        return response

    def run_gui(self, config_options):
        config = SimpleConfig(config_options)
        if self.gui:
            if hasattr(self.gui, "new_window"):
                path = config.get_wallet_path()
                self.gui.new_window(path, config.get("url"))
                response = "ok"
            else:
                response = "error: current GUI does not support multiple windows"
        else:
            response = "Error: Electrum is running in daemon mode. Please stop the daemon first."
        return response

    def load_wallet(self, path, get_wizard=None):
        if path in self.wallets:
            wallet = self.wallets[path]
        else:
            storage = WalletStorage(path)
            if get_wizard:
                if storage.file_exists:
                    wallet = Wallet(storage)
                    action = wallet.get_action()
                else:
                    action = "new"
                if action:
                    wizard = get_wizard()
                    wallet = wizard.run(self.network, storage)
                else:
                    wallet.start_threads(self.network)
            else:
                wallet = Wallet(storage)
                wallet.start_threads(self.network)
            if wallet:
                self.wallets[path] = wallet
        return wallet

    def run_cmdline(self, config_options):
        config = SimpleConfig(config_options)
        cmdname = config.get("cmd")
        cmd = known_commands[cmdname]
        path = config.get_wallet_path()
        wallet = self.load_wallet(path) if cmd.requires_wallet else None
        # arguments passed to function
        args = map(lambda x: config.get(x), cmd.params)
#.........这里部分代码省略.........

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkProxy(util.DaemonThread):
    """Proxy for communicating with the daemon or Network.

    If the daemon is running when this is initialized,
    this will create a socket pipe.
    Otherwise, this will create a new Network instance."""

    def __init__(self, socket, config=None):

        if config is None:
            config = {}  # Do not use mutables as default arguments!
        util.DaemonThread.__init__(self)
        self.config = SimpleConfig(config) if type(config) == type({}) else config
        self.message_id = 0
        self.unanswered_requests = {}
        self.subscriptions = {}
        self.debug = False
        self.lock = threading.Lock()
        self.pending_transactions_for_notifications = []
        self.callbacks = {}

        if socket:
            self.pipe = util.SocketPipe(socket)
            self.network = None
        else:
            self.pipe = util.QueuePipe()
            self.network = Network(self.pipe, config)
            self.network.start()
            for key in ['status','banner','updated','servers','interfaces']:
                value = self.network.get_status_value(key)
                self.pipe.get_queue.put({'method':'network.status', 'params':[key, value]})

        # status variables
        self.status = 'connecting'
        self.servers = {}
        self.banner = ''
        self.blockchain_height = 0
        self.server_height = 0
        self.interfaces = []

    def switch_to_active_chain(self):
        """Create a new Network instance or send message to daemon."""
        with self.lock:
            # for the network.switch_chains request
            message_id = self.message_id

            self.message_id = 0
            self.unanswered_requests = {}
            self.subscriptions = {}
            self.pending_transactions_for_notifications = []
            self.callbacks = {}

            self.status = 'connecting'
            self.servers = {}
            self.banner = ''
            self.blockchain_height = 0
            self.server_height = 0
            self.interfaces = []

            # Not daemon, probably running GUI
            if self.network:
                self.network.switch_chains()

                for key in ['status','banner','updated','servers','interfaces']:
                    value = self.network.get_status_value(key)
                    self.pipe.get_queue.put({'method':'network.status', 'params':[key, value]})
            # Daemon is running
            else:
                req = {'id': message_id, 'method': 'network.switch_chains', 'params':[chainparams.get_active_chain().code]}
                self.pipe.send(req)


    def run(self):
        while self.is_running():
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if response is None:
                break
            self.process(response)

        self.trigger_callback('stop')
        if self.network:
            self.network.stop()
        self.print_error("stopped")

    def process(self, response):
        if self.debug:
            print_error("<--", response)

        if response.get('method') == 'network.status':
            key, value = response.get('params')
            if key == 'status':
                self.status = value
            elif key == 'banner':
                self.banner = value
            elif key == 'updated':
                self.blockchain_height, self.server_height = value
            elif key == 'servers':
#.........这里部分代码省略.........

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]
class NetworkServer(util.DaemonThread):
    """Server that the daemon sends connections to.

    Handles requests/responses to/from the Network
    from ClientThreads. Also handles notifying
    ClientThreads of responses to their subscriptions."""

    def __init__(self, config):
        util.DaemonThread.__init__(self)
        self.debug = False
        self.config = config
        self.pipe = util.QueuePipe()
        self.network = Network(self.pipe, config)
        self.lock = threading.RLock()
        # each GUI is a client of the daemon
        self.clients = []
        self.request_id = 0
        # dict of {request_id: client}
        self.requests = {}

    def add_client(self, client):
        for key in ['status', 'banner', 'updated', 'servers', 'interfaces']:
            value = self.network.get_status_value(key)
            client.response_queue.put({'method':'network.status', 'params':[key, value]})
        with self.lock:
            self.clients.append(client)
            print_error("new client:", len(self.clients))

    def remove_client(self, client):
        with self.lock:
            self.clients.remove(client)
            print_error("client quit:", len(self.clients))

    def send_request(self, client, request):
        with self.lock:
            self.request_id += 1
            self.requests[self.request_id] = (request['id'], client)
            request['id'] = self.request_id
        if self.debug:
            print_error("-->", request)
        self.pipe.send(request)

    def run(self):
        self.network.start()
        while self.is_running():
            try:
                response = self.pipe.get()
            except util.timeout:
                continue
            if self.debug:
                print_error("<--", response)
            response_id = response.get('id')
            if response_id:
                with self.lock:
                    client_id, client = self.requests.pop(response_id)
                response['id'] = client_id
                client.response_queue.put(response)
            else:
                # responses with no id are notifications (e.g. to subscriptions)
                # and are sent to whichever clients have the subscription.
                m = response.get('method')
                v = response.get('params')
                for client in self.clients:
                    if repr((m, v)) in client.subscriptions or m == 'network.status':
                        client.response_queue.put(response)
        self.network.stop()
        print_error("server exiting")

# 需要导入模块: from network import Network [as 别名]
# 或者: from network.Network import stop [as 别名]

#.........这里部分代码省略.........
            Conneciton on other end status: CONNECTED
        """
        conn = self.get_connection(address)
        if conn:
            print "Connection from %s accepted" % address
            conn.status = Connection.CONNECTED
        else:
            print "Error: no connection from %s exists" % address

    def request_connection(self, address):
        """
            This is like new_connection except in this case the Connection
            with the given address already existed and had status NOT_CONNECTED.

            Before this is called:
            Connection on this end status: NOT_CONNECTED
            Conneciton on other end status: NOT_CONNECTED

            After this has executed:
            Connection on this end status: PENDING
            Conneciton on other end status: REQUEST
        """
        self._network.connect(address)
        conn = self.get_connection(address)
        if conn:
            print "Request to connect to %s sent" % address
            #conn.status = Connection.PENDING
            conn.status = Connection.CONNECTED
        else:
            print "Error: no connection to %s exists" % address

    def disconnect(self, address):
        """
            This is called when the user has an open connection to the given
            address and wants to close the connection.

            Before this is called:
            Connection on this end status: CONNECTED
            Conneciton on other end status: CONNECTED

            After this has executed:
            Connection on this end status: NOT_CONNECTED
            Conneciton on other end status: NOT_CONNECTED
        """
        self._network.disconnect(address)
        conn = self.get_connection(address)
        if conn:
            print "Disconnected from %s" % address
            conn.status = Connection.NOT_CONNECTED
        else:
            print "Error: no connection to %s exists" % address    

    def cancel_request(self, address):
        """
            This is called when the user has requested a connection to the given
            address and the request is still pending but the user wants to
            cancel the request.

            Before this is called:
            Connection on this end status: PENDING
            Conneciton on other end status: REQUEST

            After this has executed:
            Connection on this end status: NOT_CONNECTED
            Conneciton on other end status: NOT_CONNECTED
        """
        conn = self.get_connection(address)
        if conn:
            print "Request to %s canceled" % address
            conn.status = Connection.NOT_CONNECTED
        else:
            print "Error: no connection to %s exists" % address

    def del_connection(self, address):
        """
            Removes the Connection with the given address from the list of
            connections.
        """
        conn = self.get_connection(address)
        if conn:
            if conn.status == Connection.CONNECTED:
                self.disconnect(address)
            self._con_mgr.del_connection(address)
        else:
            print "Error: no connection to %s exists" % address

    def update_alias(self, address, new_alias):
        """
            Changes the alias of the Connection with the given address to be
            new_alias.
        """
        conn = self.get_connection(address)
        if conn:
            print "Updated alias of %s to %s" % (address, new_alias)
            conn.alias = new_alias
        else:
            print "Error: no connection to %s exists" % address

    def close(self):
        self._network.stop()