Mercurial > libervia-backend

annotate src/plugins/plugin_misc_ip.py @ 2281:4af1805cc6df

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jp (pubsub/delete): delete command implementation (to delete an item)
author Goffi <goffi@goffi.org>
date Wed, 28 Jun 2017 20:28:58 +0200
parents a543eda2c923
children 8b37a62336c3
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1934
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for IP address discovery
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _, D_
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23 log = getLogger(__name__)
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24 from sat.tools import xml_tools
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25 from twisted.web import client as webclient
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26 from twisted.web import error as web_error
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27 from twisted.internet import defer
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28 from twisted.internet import reactor
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29 from twisted.internet import protocol
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30 from twisted.internet import endpoints
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31 from twisted.internet import error as internet_error
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32 from zope.interface import implements
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33 from wokkel import disco, iwokkel
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34 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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35 from twisted.words.protocols.jabber.error import StanzaError
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36 import urlparse
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37 try:
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38 import netifaces
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39 except ImportError:
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40 log.warning(u"netifaces is not available, it help discovering IPs, you can install it on https://pypi.python.org/pypi/netifaces")
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41 netifaces = None
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42
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43
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44 PLUGIN_INFO = {
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45 C.PI_NAME: "IP discovery",
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46 C.PI_IMPORT_NAME: "IP",
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47 C.PI_TYPE: C.PLUG_TYPE_MISC,
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48 C.PI_PROTOCOLS: ["XEP-0279"],
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49 C.PI_RECOMMENDATIONS: ["NAT-PORT"],
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50 C.PI_MAIN: "IPPlugin",
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51 C.PI_HANDLER: "yes",
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52 C.PI_DESCRIPTION: _("""This plugin help to discover our external IP address.""")
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53 }
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54
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55 # TODO: GET_IP_PAGE should be configurable in sat.conf
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56 GET_IP_PAGE = "http://salut-a-toi.org/whereami/" # This page must only return external IP of the requester
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57 GET_IP_LABEL = D_(u"Allow external get IP")
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58 GET_IP_CATEGORY = "General"
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59 GET_IP_NAME = "allow_get_ip"
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60 GET_IP_CONFIRM_TITLE = D_(u"Confirm external site request")
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61 GET_IP_CONFIRM = D_(u"""To facilitate data transfer, we need to contact a website.
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62 A request will be done on {page}
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63 That means that administrators of {domain} can know that you use "{app_name}" and your IP Address.
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64
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65 IP address is an identifier to locate you on Internet (similar to a phone number).
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66
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67 Do you agree to do this request ?
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68 """).format(
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69 page = GET_IP_PAGE,
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70 domain = urlparse.urlparse(GET_IP_PAGE).netloc,
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71 app_name = C.APP_NAME)
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72 NS_IP_CHECK = "urn:xmpp:sic:1"
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73
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74 PARAMS = """
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75 <params>
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76 <general>
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77 <category name="{category}">
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78 <param name="{name}" label="{label}" type="bool" />
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79 </category>
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80 </general>
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81 </params>
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82 """.format(category=GET_IP_CATEGORY, name=GET_IP_NAME, label=GET_IP_LABEL)
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83
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84
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85 class IPPlugin(object):
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86 # TODO: refresh IP if a new connection is detected
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87 # TODO: manage IPv6 when implemented in SàT
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88
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89 def __init__(self, host):
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90 log.info(_("plugin IP discovery initialization"))
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91 self.host = host
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92 host.memory.updateParams(PARAMS)
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93
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94 # NAT-Port
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95 try:
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96 self._nat = host.plugins['NAT-PORT']
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97 except KeyError:
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98 log.debug(u"NAT port plugin not available")
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99 self._nat = None
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100
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101 # XXX: cache is kept until SàT is restarted
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102 # if IP may have changed, use self.refreshIP
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103 self._external_ip_cache = None
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104 self._local_ip_cache = None
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105
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106 def getHandler(self, client):
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107 return IPPlugin_handler()
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108
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109 def refreshIP(self):
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110 # FIXME: use a trigger instead ?
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111 self._external_ip_cache = None
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112 self._local_ip_cache = None
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113
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114 def _externalAllowed(self, profile):
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115 """Return value of parameter with autorisation of user to do external requests
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116
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117 if parameter is not set, a dialog is shown to use to get its confirmation, and parameted is set according to answer
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118 @param profile: %(doc_profile)s
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119 @return (defer.Deferred[bool]): True if external request is autorised
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120 """
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121 allow_get_ip = self.host.memory.params.getParamA(GET_IP_NAME, GET_IP_CATEGORY, use_default=False)
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122
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123 if allow_get_ip is None:
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124 # we don't have autorisation from user yet to use get_ip, we ask him
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125 def setParam(allowed):
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126 # FIXME: we need to use boolConst as setParam only manage str/unicode
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127 # need to be fixed when params will be refactored
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128 self.host.memory.setParam(GET_IP_NAME, C.boolConst(allowed), GET_IP_CATEGORY)
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129 return allowed
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130 d = xml_tools.deferConfirm(self.host, _(GET_IP_CONFIRM), _(GET_IP_CONFIRM_TITLE), profile=profile)
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parents: 1534
diff changeset
131 d.addCallback(setParam)
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132 return d
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133
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diff changeset
134 return defer.succeed(allow_get_ip)
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135
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Goffi <goffi@goffi.org>
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diff changeset
136 def _filterAddresse(self, ip_addr):
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Goffi <goffi@goffi.org>
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137 """Filter acceptable addresses
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138
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Goffi <goffi@goffi.org>
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diff changeset
139 For now, just remove IPv4 local addresses
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Goffi <goffi@goffi.org>
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diff changeset
140 @param ip_addr(str): IP addresse
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Goffi <goffi@goffi.org>
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diff changeset
141 @return (bool): True if addresse is acceptable
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Goffi <goffi@goffi.org>
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142 """
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Goffi <goffi@goffi.org>
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diff changeset
143 return not ip_addr.startswith('127.')
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144
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
145 def _insertFirst(self, addresses, ip_addr):
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Goffi <goffi@goffi.org>
parents: 1534
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146 """Insert ip_addr as first item in addresses
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147
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diff changeset
148 @param ip_addr(str): IP addresse
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149 @param addresses(list): list of IP addresses
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Goffi <goffi@goffi.org>
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150 """
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
151 if ip_addr in addresses:
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
152 if addresses[0] != ip_addr:
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
153 addresses.remove(ip_addr)
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diff changeset
154 addresses.insert(0, ip_addr)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
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diff changeset
155 else:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
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diff changeset
156 addresses.insert(0, ip_addr)
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parents: 1534
diff changeset
157
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
158 def _getIPFromExternal(self, ext_url):
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
159 """Get local IP by doing a connection on an external url
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
160
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Goffi <goffi@goffi.org>
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diff changeset
161 @param ext_utl(str): url to connect to
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162 @return (D(str)): return local IP
1537
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Goffi <goffi@goffi.org>
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diff changeset
163 """
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
164 url = urlparse.urlparse(ext_url)
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Goffi <goffi@goffi.org>
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165 port = url.port
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Goffi <goffi@goffi.org>
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diff changeset
166 if port is None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
167 if url.scheme=='http':
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
168 port = 80
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Goffi <goffi@goffi.org>
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diff changeset
169 elif url.scheme=='https':
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Goffi <goffi@goffi.org>
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diff changeset
170 port = 443
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
171 else:
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
172 log.error(u"Unknown url scheme: {}".format(url.scheme))
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parents: 1534
diff changeset
173 defer.returnValue(None)
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
174 if url.hostname is None:
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
175 log.error(u"Can't find url hostname for {}".format(GET_IP_PAGE))
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parents: 1534
diff changeset
176
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
177 point = endpoints.TCP4ClientEndpoint(reactor, url.hostname, port)
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parents: 1534
diff changeset
178 def gotConnection(p):
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
179 local_ip = p.transport.getHost().host
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
180 p.transport.loseConnection()
6fa9e8c02c34 plugin IP discovery: better IP discovering:
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parents: 1534
diff changeset
181 return local_ip
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diff changeset
182
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
183 d = endpoints.connectProtocol(point, protocol.Protocol())
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
184 d.addCallback(gotConnection)
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
185 return d
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
186
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
187 @defer.inlineCallbacks
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
188 def getLocalIPs(self, profile):
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
189 """Try do discover local area network IPs
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
190
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
191 @param profile): %(doc_profile)s
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
192 @return (deferred): list of lan IP addresses
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
193 if there are several addresses, the one used with the server is put first
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
194 if no address is found, localhost IP will be in the list
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
195 """
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
196 # TODO: manage permission requesting (e.g. for UMTS link)
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Goffi <goffi@goffi.org>
parents: 1537
diff changeset
197 if self._local_ip_cache is not None:
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Goffi <goffi@goffi.org>
parents: 1537
diff changeset
198 defer.returnValue(self._local_ip_cache)
1534
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Goffi <goffi@goffi.org>
parents:
diff changeset
199 client = self.host.getClient(profile)
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
200 addresses = []
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
201 localhost = ['127.0.0.1']
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
202
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
203 # we first try our luck with netifaces
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
204 if netifaces is not None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
205 addresses = []
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
206 for interface in netifaces.interfaces():
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
207 if_addresses = netifaces.ifaddresses(interface)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
208 try:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
209 inet_list = if_addresses[netifaces.AF_INET]
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
210 except KeyError:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
211 continue
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
212 for data in inet_list:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
213 addresse = data['addr']
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
214 if self._filterAddresse(addresse):
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
215 addresses.append(addresse)
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parents: 1534
diff changeset
216
1576
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Goffi <goffi@goffi.org>
parents: 1566
diff changeset
217 # then we use our connection to server
1537
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Goffi <goffi@goffi.org>
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diff changeset
218 ip = client.xmlstream.transport.getHost().host
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
219 if self._filterAddresse(ip):
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
220 self._insertFirst(addresses, ip)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
221 defer.returnValue(addresses)
1534
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parents:
diff changeset
222
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
223 # if server is local, we try with NAT-Port
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
224 if self._nat is not None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
225 nat_ip = yield self._nat.getIP(local=True)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
226 if nat_ip is not None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
227 self._insertFirst(addresses, nat_ip)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
228 defer.returnValue(addresses)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
229
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
230 if addresses:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
231 defer.returnValue(addresses)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
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parents: 1534
diff changeset
232
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
233 # still not luck, we need to contact external website
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
234 allow_get_ip = yield self._externalAllowed(profile)
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
235
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
236 if not allow_get_ip:
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
237 defer.returnValue(addresses or localhost)
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
238
1555
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Goffi <goffi@goffi.org>
parents: 1537
diff changeset
239 try:
eb8aae35085b plugin ip: local ip cache + DNS error detection
Goffi <goffi@goffi.org>
parents: 1537
diff changeset
240 ip_tuple = yield self._getIPFromExternal(GET_IP_PAGE)
1566
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
241 except (internet_error.DNSLookupError, internet_error.TimeoutError):
1555
eb8aae35085b plugin ip: local ip cache + DNS error detection
Goffi <goffi@goffi.org>
parents: 1537
diff changeset
242 log.warning(u"Can't access Domain Name System")
1576
d5f59ba166fe plugins IP: getLocalIPs now return localhost IP instead of an empty list if no non-localhost ip can be found
Goffi <goffi@goffi.org>
parents: 1566
diff changeset
243 defer.returnValue(addresses or localhost)
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
244 self._insertFirst(addresses, ip_tuple.local)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
245 defer.returnValue(addresses)
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
246
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
247 @defer.inlineCallbacks
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
parents: 1534
diff changeset
248 def getExternalIP(self, profile):
1534
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parents:
diff changeset
249 """Try to discover external IP
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parents:
diff changeset
250
a5e0393a06cd plugin ip, params: plugin IP discovery, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
251 @param profile: %(doc_profile)s
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parents:
diff changeset
252 @return (deferred): external IP address or None if it can't be discovered
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Goffi <goffi@goffi.org>
parents:
diff changeset
253 """
1555
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Goffi <goffi@goffi.org>
parents: 1537
diff changeset
254 if self._external_ip_cache is not None:
eb8aae35085b plugin ip: local ip cache + DNS error detection
Goffi <goffi@goffi.org>
parents: 1537
diff changeset
255 defer.returnValue(self._external_ip_cache)
1534
a5e0393a06cd plugin ip, params: plugin IP discovery, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
256
2148
a543eda2c923 core (memory/disco): getInfos now handle node + use client instead of profile in many methods
Goffi <goffi@goffi.org>
parents: 2145
diff changeset
257 client = self.host.getClient(profile)
a543eda2c923 core (memory/disco): getInfos now handle node + use client instead of profile in many methods
Goffi <goffi@goffi.org>
parents: 2145
diff changeset
258
1566
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Goffi <goffi@goffi.org>
parents: 1555
diff changeset
259 # we first try with XEP-0279
2148
a543eda2c923 core (memory/disco): getInfos now handle node + use client instead of profile in many methods
Goffi <goffi@goffi.org>
parents: 2145
diff changeset
260 ip_check = yield self.host.hasFeature(client, NS_IP_CHECK)
1668
a9e86f660653 plugin ip: fixed ip check (XEP-0279) use
Goffi <goffi@goffi.org>
parents: 1576
diff changeset
261 if ip_check:
1566
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
262 log.debug(u"Server IP Check available, we use it to retrieve our IP")
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
263 client = self.host.getClient(profile)
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
264 iq_elt = client.IQ("get")
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
265 iq_elt.addElement((NS_IP_CHECK, 'address'))
ec3848916ee8 plugin ip: implemented XEP-0279 for external ip retrieval + fixed bad exception handling
Goffi <goffi@goffi.org>
parents: 1555
diff changeset
266 try:
1668
a9e86f660653 plugin ip: fixed ip check (XEP-0279) use
Goffi <goffi@goffi.org>
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diff changeset
267 result_elt = yield iq_elt.send()
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268 address_elt = result_elt.elements(NS_IP_CHECK, 'address').next()
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269 ip_elt = address_elt.elements(NS_IP_CHECK,'ip').next()
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270 except StopIteration:
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271 log.warning(u"Server returned invalid result on XEP-0279 request, we ignore it")
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272 except StanzaError as e:
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273 log.warning(u"error while requesting ip to server: {}".format(e))
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274 else:
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275 # FIXME: server IP may not be the same as external IP (server can be on local machine or network)
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276 # IP should be checked to see if we have a local one, and rejected in this case
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277 external_ip = str(ip_elt)
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278 log.debug(u"External IP found: {}".format(external_ip))
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279 self._external_ip_cache = external_ip
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280 defer.returnValue(self._external_ip_cache)
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281
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282 # then with NAT-Port
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283 if self._nat is not None:
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284 nat_ip = yield self._nat.getIP()
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285 if nat_ip is not None:
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286 self._external_ip_cache = nat_ip
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287 defer.returnValue(nat_ip)
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288
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289 # and finally by requesting external website
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290 allow_get_ip = yield self._externalAllowed(profile)
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291 try:
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292 ip = (yield webclient.getPage(GET_IP_PAGE)) if allow_get_ip else None
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293 except (internet_error.DNSLookupError, internet_error.TimeoutError):
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294 log.warning(u"Can't access Domain Name System")
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295 ip = None
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296 except web_error.Error as e:
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297 log.warning(u"Error while retrieving IP on {url}: {message}".format(url=GET_IP_PAGE, message=e))
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298 ip = None
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299 else:
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300 self._external_ip_cache = ip
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301 defer.returnValue(ip)
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302
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303
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304 class IPPlugin_handler(XMPPHandler):
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305 implements(iwokkel.IDisco)
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306
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307 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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308 return [disco.DiscoFeature(NS_IP_CHECK)]
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309
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310 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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311 return []