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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, a Integrated Development Environment for

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#programming IEC 61131-3 automates supporting plcopen standard and CanFestival. 

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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 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 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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#General Public License for more details.

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#

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#You should have received a copy of the GNU General Public

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#License along with this library; if not, write to the Free Software

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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import Zeroconf, socket

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# type: fully qualified service type name

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service_type = '_PYRO._tcp.local.'

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# properties: dictionary of properties (or a string holding the bytes for the text field)

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serviceproperties = {'description':'Beremiz remote PLC'}

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def gethostaddr(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 error:

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        pass

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    return socket.gethostbyname(socket.gethostname())

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def ServicePublisher(name, ip, port):

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        # name: fully qualified service name

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        service_name = 'Beremiz_%s.%s'%(name,service_type)

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        # No ip params -> get host ip

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        if ip == "":

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            ip = gethostaddr()

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        print "Mon IP est :"+ip

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        server = Zeroconf.Zeroconf(ip)

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        # address: IP address as unsigned short, network byte order

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        ip_32b = socket.inet_aton(ip)

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        server.registerService(

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             Zeroconf.ServiceInfo(service_type,

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                                  service_name,

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                                  ip_32b,

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                                  port,

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                                  properties = serviceproperties))

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        return server