author | Edouard Tisserant |
Thu, 19 Apr 2018 15:17:05 +0200 | |
changeset 1999 | 36a624779f9f |
parent 1881 | 091005ec69c4 |
child 2320 | dd959601e67a |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# This file is part of Beremiz runtime. |
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# |
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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# |
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# See COPYING.Runtime file for copyrights details. |
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# |
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# This library is free software; you can redistribute it and/or |
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# modify it under the terms of the GNU Lesser General Public |
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# License as published by the Free Software Foundation; either |
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# version 2.1 of the License, or (at your option) any later version. |
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|
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# This library is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# Lesser General Public License for more details. |
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|
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# You should have received a copy of the GNU Lesser General Public |
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# License along with this library; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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from __future__ import absolute_import |
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from __future__ import print_function |
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import socket |
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import threading |
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import zeroconf |
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service_type = '_PYRO._tcp.local.' |
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class ServicePublisher(object): |
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def __init__(self): |
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# type: fully qualified service type name |
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self.serviceproperties = {'description': 'Beremiz remote PLC'} |
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self.name = None |
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self.ip_32b = None |
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self.port = None |
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self.server = None |
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self.service_name = None |
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self.retrytimer = None |
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def RegisterService(self, name, ip, port): |
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try: |
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self._RegisterService(name, ip, port) |
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except Exception: |
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self.retrytimer = threading.Timer(2, self.RegisterService, [name, ip, port]) |
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self.retrytimer.start() |
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def _RegisterService(self, name, ip, port): |
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# name: fully qualified service name |
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self.service_name = 'Beremiz_%s.%s' % (name, service_type) |
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self.name = name |
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self.port = port |
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self.server = zeroconf.Zeroconf() |
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print("MDNS brodcasting on :" + ip) |
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if ip == "0.0.0.0": |
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ip = self.gethostaddr() |
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print("MDNS brodcasted service address :" + ip) |
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self.ip_32b = socket.inet_aton(ip) |
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self.server.register_service( |
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zeroconf.ServiceInfo(service_type, |
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self.service_name, |
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self.ip_32b, |
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self.port, |
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properties=self.serviceproperties)) |
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self.retrytimer = None |
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def UnRegisterService(self): |
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if self.retrytimer is not None: |
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self.retrytimer.cancel() |
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if self.server is not None: |
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self.server.unregister_service( |
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zeroconf.ServiceInfo(service_type, |
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self.service_name, |
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self.ip_32b, |
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self.port, |
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properties=self.serviceproperties)) |
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self.server.close() |
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self.server = None |
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def gethostaddr(self, dst='224.0.1.41'): |
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
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try: |
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s.connect((dst, 7)) |
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(host, _port) = s.getsockname() |
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s.close() |
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if host != '0.0.0.0': |
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return host |
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except Exception: |
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pass |
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return socket.gethostbyname(socket.gethostname()) |