annotate src/plugins/plugin_misc_ip.py @ 1545:b8ee774c12c8

jp: renamed “params” command to “param” for consistency with other commands + added a “get” subcommand
author Goffi <goffi@goffi.org>
date Mon, 02 Nov 2015 22:02:41 +0100
parents 6fa9e8c02c34
children eb8aae35085b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/python
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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, 2010, 2011, 2012, 2013, 2014, 2015 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.internet import defer
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27 from twisted.internet import reactor
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28 from twisted.internet import protocol
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29 from twisted.internet import endpoints
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30 import urlparse
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31 try:
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32 import netifaces
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33 except ImportError:
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34 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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35 netifaces = None
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36
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37
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38 PLUGIN_INFO = {
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39 "name": "IP discovery",
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40 "import_name": "IP",
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41 "type": C.PLUG_TYPE_MISC,
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42 "recommendations": ["NAT-PORT"],
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43 "main": "IPPlugin",
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44 "handler": "no",
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45 "description": _("""This plugin help to discover our external IP address.""")
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46 }
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47
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48 GET_IP_PAGE = "http://www.goffi.org/sat_tools/get_ip.php" # This page must only return external IP of the requester
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49 GET_IP_LABEL = D_(u"Allow external get IP")
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50 GET_IP_CATEGORY = "General"
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51 GET_IP_NAME = "allow_get_ip"
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52 GET_IP_CONFIRM_TITLE = D_(u"Confirm external site request")
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53 GET_IP_CONFIRM = D_(u"""To facilitate data transfer, we need to contact a website.
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54 A request will be done on {page}
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55 That means that administrators of {domain} can know that you use "{app_name}" and your IP Address.
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56
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57 IP address is an identifier to locate you on Internet (similar to a phone number).
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58
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59 Do you agree to do this request ?
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60 """).format(
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61 page = GET_IP_PAGE,
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62 domain = urlparse.urlparse(GET_IP_PAGE).netloc,
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63 app_name = C.APP_NAME)
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64
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65 PARAMS = """
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66 <params>
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67 <general>
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68 <category name="{category}">
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69 <param name="{name}" label="{label}" type="bool" />
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70 </category>
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71 </general>
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72 </params>
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73 """.format(category=GET_IP_CATEGORY, name=GET_IP_NAME, label=GET_IP_LABEL)
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74
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75
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76 class IPPlugin(object):
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77 # TODO: refresh IP if a new connection is detected
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78 # TODO: manage IPv6 when implemented in SàT
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79 # TODO: implement XEP-0279
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80
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81 def __init__(self, host):
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82 log.info(_("plugin IP discovery initialization"))
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83 self.host = host
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84 host.memory.updateParams(PARAMS)
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85
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86 # NAT-Port
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87 try:
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88 self._nat = host.plugins['NAT-PORT']
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89 except KeyError:
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90 log.debug(u"NAT port plugin not available")
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91 self._nat = None
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92
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93 # XXX: cache is kept until SàT is restarted
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94 # if IP may have changed, use self.refreshIP
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95 self._ip_cache = None
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96
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97 def refreshIP(self):
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98 # FIXME: use a trigger instead ?
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99 self._ip_cache = None
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100
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101 def _externalAllowed(self, profile):
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102 """Return value of parameter with autorisation of user to do external requests
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103
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104 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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105 @param profile: %(doc_profile)s
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106 @return (defer.Deferred[bool]): True if external request is autorised
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107 """
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108 allow_get_ip = self.host.memory.params.getParamA(GET_IP_NAME, GET_IP_CATEGORY, use_default=False)
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109
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110 if allow_get_ip is None:
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111 # we don't have autorisation from user yet to use get_ip, we ask him
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112 def setParam(allowed):
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113 # FIXME: we need to use boolConst as setParam only manage str/unicode
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114 # need to be fixed when params will be refactored
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115 self.host.memory.setParam(GET_IP_NAME, C.boolConst(allow_get_ip), GET_IP_CATEGORY)
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116 return allowed
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117 d = xml_tools.deferConfirm(self.host, _(GET_IP_CONFIRM), _(GET_IP_CONFIRM_TITLE), profile=profile)
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118 d.addCallback(setParam)
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119 return d
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120
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121 return defer.succeed(allow_get_ip)
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122
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123 def _filterAddresse(self, ip_addr):
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124 """Filter acceptable addresses
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125
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126 For now, just remove IPv4 local addresses
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127 @param ip_addr(str): IP addresse
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128 @return (bool): True if addresse is acceptable
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129 """
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130 return not ip_addr.startswith('127.')
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131
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132 def _insertFirst(self, addresses, ip_addr):
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133 """Insert ip_addr as first item in addresses
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134
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135 @param ip_addr(str): IP addresse
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136 @param addresses(list): list of IP addresses
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137 """
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138 if ip_addr in addresses:
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139 if addresses[0] != ip_addr:
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140 addresses.remove(ip_addr)
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141 addresses.insert(0, ip_addr)
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142 else:
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143 addresses.insert(0, ip_addr)
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144
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145 def _getIPFromExternal(self, ext_url):
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146 """Get local IP by doing a connection on an external url
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147
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148 @param ext_utl(str): url to connect to
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149 @return (defer.Deferred): return local IP
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150 """
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151 url = urlparse.urlparse(ext_url)
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152 port = url.port
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153 if port is None:
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154 if url.scheme=='http':
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155 port = 80
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156 elif url.scheme=='https':
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157 port = 443
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158 else:
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159 log.error(u"Unknown url scheme: {}".format(url.scheme))
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160 defer.returnValue(None)
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161 if url.hostname is None:
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162 log.error(u"Can't find url hostname for {}".format(GET_IP_PAGE))
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163
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164 point = endpoints.TCP4ClientEndpoint(reactor, url.hostname, port)
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165 def gotConnection(p):
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166 local_ip = p.transport.getHost().host
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167 p.transport.loseConnection()
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168 return local_ip
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169
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170 d = endpoints.connectProtocol(point, protocol.Protocol())
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171 d.addCallback(gotConnection)
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172 return d
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173
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174
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175 @defer.inlineCallbacks
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176 def getLocalIPs(self, profile):
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177 """Try do discover local area network IPs
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178
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179 @param profile): %(doc_profile)s
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180 @return (deferred): list of lan IP addresses
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181 or empty list if it can't be discovered
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182 if there are several addresses, the one used with the server is put first
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183 """
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184 # TODO: manage permission requesting (e.g. for UMTS link)
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185 client = self.host.getClient(profile)
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186 addresses = []
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187
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188 # we first try our luck with netifaces
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189 if netifaces is not None:
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190 addresses = []
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191 for interface in netifaces.interfaces():
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192 if_addresses = netifaces.ifaddresses(interface)
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193 try:
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194 inet_list = if_addresses[netifaces.AF_INET]
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195 except KeyError:
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196 continue
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197 for data in inet_list:
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198 addresse = data['addr']
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199 if self._filterAddresse(addresse):
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200 addresses.append(addresse)
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201
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202 # we first try with our connection to server
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203 ip = client.xmlstream.transport.getHost().host
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Goffi <goffi@goffi.org>
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204 if self._filterAddresse(ip):
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205 self._insertFirst(addresses, ip)
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206 defer.returnValue(addresses)
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207
1537
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208 # if not available, we try with NAT-Port
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209 if self._nat is not None:
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210 nat_ip = yield self._nat.getIP(local=True)
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211 if nat_ip is not None:
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212 self._insertFirst(addresses, nat_ip)
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213 defer.returnValue(addresses)
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214
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215 if addresses:
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216 defer.returnValue(addresses)
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217
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218 # still not luck, we need to contact external website
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219 allow_get_ip = yield self._externalAllowed(profile)
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220
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221 if not allow_get_ip:
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222 defer.returnValue(addresses)
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223
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diff changeset
224 ip_tuple = yield self._getIPFromExternal(GET_IP_PAGE)
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diff changeset
225 self._insertFirst(addresses, ip_tuple.local)
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diff changeset
226 defer.returnValue(addresses)
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227
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228
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diff changeset
229 @defer.inlineCallbacks
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230 def getExternalIP(self, profile):
1534
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231 """Try to discover external IP
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232
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233 @param profile: %(doc_profile)s
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234 @return (deferred): external IP address or None if it can't be discovered
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235 """
1537
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
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236 if self._ip_cache is not None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
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diff changeset
237 defer.returnValue(self._ip_cache)
1534
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238
1537
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diff changeset
239 # we first try with NAT-Port
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Goffi <goffi@goffi.org>
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diff changeset
240 if self._nat is not None:
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
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241 nat_ip = yield self._nat.getIP()
6fa9e8c02c34 plugin IP discovery: better IP discovering:
Goffi <goffi@goffi.org>
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diff changeset
242 if nat_ip is not None:
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Goffi <goffi@goffi.org>
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diff changeset
243 defer.returnValue(nat_ip)
1534
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244
1537
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245 # then by requesting external website
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Goffi <goffi@goffi.org>
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246 allow_get_ip = yield self._externalAllowed(profile)
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Goffi <goffi@goffi.org>
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diff changeset
247 ip = webclient.getPage(GET_IP_PAGE) if allow_get_ip else None
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Goffi <goffi@goffi.org>
parents: 1534
diff changeset
248 defer.returnValue(ip)