Mercurial > libervia-backend
annotate src/plugins/plugin_misc_ip.py @ 1727:68e498b3367e
reverted revision 2ebe66a96d05
author | souliane <souliane@mailoo.org> |
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date | Tue, 08 Dec 2015 16:55:54 +0100 |
parents | a9e86f660653 |
children | d17772b0fe22 |
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 from twisted.internet import error as internet_error |
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31 from zope.interface import implements |
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32 from wokkel import disco, iwokkel |
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33 from twisted.words.protocols.jabber.xmlstream import XMPPHandler |
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34 from twisted.words.protocols.jabber.error import StanzaError |
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35 import urlparse |
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36 try: |
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37 import netifaces |
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38 except ImportError: |
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39 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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40 netifaces = None |
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41 |
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42 |
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43 PLUGIN_INFO = { |
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44 "name": "IP discovery", |
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45 "import_name": "IP", |
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46 "type": C.PLUG_TYPE_MISC, |
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47 "protocols": ["XEP-0279"], |
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48 "recommendations": ["NAT-PORT"], |
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49 "main": "IPPlugin", |
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50 "handler": "yes", |
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51 "description": _("""This plugin help to discover our external IP address.""") |
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52 } |
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53 |
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54 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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55 GET_IP_LABEL = D_(u"Allow external get IP") |
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56 GET_IP_CATEGORY = "General" |
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57 GET_IP_NAME = "allow_get_ip" |
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58 GET_IP_CONFIRM_TITLE = D_(u"Confirm external site request") |
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59 GET_IP_CONFIRM = D_(u"""To facilitate data transfer, we need to contact a website. |
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60 A request will be done on {page} |
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61 That means that administrators of {domain} can know that you use "{app_name}" and your IP Address. |
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62 |
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63 IP address is an identifier to locate you on Internet (similar to a phone number). |
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64 |
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65 Do you agree to do this request ? |
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66 """).format( |
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67 page = GET_IP_PAGE, |
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68 domain = urlparse.urlparse(GET_IP_PAGE).netloc, |
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69 app_name = C.APP_NAME) |
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70 NS_IP_CHECK = "urn:xmpp:sic:1" |
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71 |
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72 PARAMS = """ |
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73 <params> |
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74 <general> |
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75 <category name="{category}"> |
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76 <param name="{name}" label="{label}" type="bool" /> |
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77 </category> |
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78 </general> |
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79 </params> |
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80 """.format(category=GET_IP_CATEGORY, name=GET_IP_NAME, label=GET_IP_LABEL) |
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81 |
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82 |
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83 class IPPlugin(object): |
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84 # TODO: refresh IP if a new connection is detected |
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85 # TODO: manage IPv6 when implemented in SàT |
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86 |
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87 def __init__(self, host): |
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88 log.info(_("plugin IP discovery initialization")) |
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89 self.host = host |
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90 host.memory.updateParams(PARAMS) |
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91 |
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92 # NAT-Port |
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93 try: |
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94 self._nat = host.plugins['NAT-PORT'] |
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95 except KeyError: |
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96 log.debug(u"NAT port plugin not available") |
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97 self._nat = None |
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98 |
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99 # XXX: cache is kept until SàT is restarted |
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100 # if IP may have changed, use self.refreshIP |
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101 self._external_ip_cache = None |
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102 self._local_ip_cache = None |
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103 |
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104 def getHandler(self, profile): |
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105 return IPPlugin_handler() |
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106 |
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107 def refreshIP(self): |
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108 # FIXME: use a trigger instead ? |
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109 self._external_ip_cache = None |
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110 self._local_ip_cache = None |
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111 |
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112 def _externalAllowed(self, profile): |
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113 """Return value of parameter with autorisation of user to do external requests |
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114 |
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115 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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116 @param profile: %(doc_profile)s |
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117 @return (defer.Deferred[bool]): True if external request is autorised |
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118 """ |
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119 allow_get_ip = self.host.memory.params.getParamA(GET_IP_NAME, GET_IP_CATEGORY, use_default=False) |
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120 |
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121 if allow_get_ip is None: |
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122 # we don't have autorisation from user yet to use get_ip, we ask him |
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123 def setParam(allowed): |
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124 # FIXME: we need to use boolConst as setParam only manage str/unicode |
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125 # need to be fixed when params will be refactored |
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126 self.host.memory.setParam(GET_IP_NAME, C.boolConst(allowed), GET_IP_CATEGORY) |
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127 return allowed |
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128 d = xml_tools.deferConfirm(self.host, _(GET_IP_CONFIRM), _(GET_IP_CONFIRM_TITLE), profile=profile) |
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129 d.addCallback(setParam) |
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130 return d |
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131 |
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132 return defer.succeed(allow_get_ip) |
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133 |
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134 def _filterAddresse(self, ip_addr): |
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135 """Filter acceptable addresses |
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136 |
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137 For now, just remove IPv4 local addresses |
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138 @param ip_addr(str): IP addresse |
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139 @return (bool): True if addresse is acceptable |
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140 """ |
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141 return not ip_addr.startswith('127.') |
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142 |
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143 def _insertFirst(self, addresses, ip_addr): |
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144 """Insert ip_addr as first item in addresses |
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145 |
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146 @param ip_addr(str): IP addresse |
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147 @param addresses(list): list of IP addresses |
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148 """ |
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149 if ip_addr in addresses: |
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150 if addresses[0] != ip_addr: |
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151 addresses.remove(ip_addr) |
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152 addresses.insert(0, ip_addr) |
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153 else: |
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154 addresses.insert(0, ip_addr) |
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155 |
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156 def _getIPFromExternal(self, ext_url): |
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157 """Get local IP by doing a connection on an external url |
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158 |
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159 @param ext_utl(str): url to connect to |
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160 @return (D(str)): return local IP |
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161 """ |
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162 url = urlparse.urlparse(ext_url) |
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163 port = url.port |
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164 if port is None: |
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165 if url.scheme=='http': |
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166 port = 80 |
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167 elif url.scheme=='https': |
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168 port = 443 |
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169 else: |
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170 log.error(u"Unknown url scheme: {}".format(url.scheme)) |
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171 defer.returnValue(None) |
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172 if url.hostname is None: |
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173 log.error(u"Can't find url hostname for {}".format(GET_IP_PAGE)) |
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174 |
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175 point = endpoints.TCP4ClientEndpoint(reactor, url.hostname, port) |
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176 def gotConnection(p): |
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177 local_ip = p.transport.getHost().host |
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178 p.transport.loseConnection() |
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179 return local_ip |
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180 |
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181 d = endpoints.connectProtocol(point, protocol.Protocol()) |
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182 d.addCallback(gotConnection) |
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183 return d |
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184 |
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185 @defer.inlineCallbacks |
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186 def getLocalIPs(self, profile): |
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187 """Try do discover local area network IPs |
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188 |
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189 @param profile): %(doc_profile)s |
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190 @return (deferred): list of lan IP addresses |
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191 if there are several addresses, the one used with the server is put first |
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192 if no address is found, localhost IP will be in the list |
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193 """ |
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194 # TODO: manage permission requesting (e.g. for UMTS link) |
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195 if self._local_ip_cache is not None: |
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196 defer.returnValue(self._local_ip_cache) |
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197 client = self.host.getClient(profile) |
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198 addresses = [] |
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199 localhost = ['127.0.0.1'] |
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200 |
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201 # we first try our luck with netifaces |
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202 if netifaces is not None: |
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203 addresses = [] |
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204 for interface in netifaces.interfaces(): |
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205 if_addresses = netifaces.ifaddresses(interface) |
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206 try: |
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207 inet_list = if_addresses[netifaces.AF_INET] |
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208 except KeyError: |
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209 continue |
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210 for data in inet_list: |
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211 addresse = data['addr'] |
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212 if self._filterAddresse(addresse): |
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213 addresses.append(addresse) |
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214 |
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215 # then we use our connection to server |
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216 ip = client.xmlstream.transport.getHost().host |
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217 if self._filterAddresse(ip): |
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218 self._insertFirst(addresses, ip) |
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219 defer.returnValue(addresses) |
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220 |
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221 # if server is local, we try with NAT-Port |
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222 if self._nat is not None: |
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223 nat_ip = yield self._nat.getIP(local=True) |
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224 if nat_ip is not None: |
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225 self._insertFirst(addresses, nat_ip) |
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226 defer.returnValue(addresses) |
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227 |
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228 if addresses: |
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229 defer.returnValue(addresses) |
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230 |
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231 # still not luck, we need to contact external website |
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232 allow_get_ip = yield self._externalAllowed(profile) |
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233 |
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234 if not allow_get_ip: |
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235 defer.returnValue(addresses or localhost) |
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236 |
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237 try: |
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238 ip_tuple = yield self._getIPFromExternal(GET_IP_PAGE) |
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239 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
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240 log.warning(u"Can't access Domain Name System") |
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241 defer.returnValue(addresses or localhost) |
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242 self._insertFirst(addresses, ip_tuple.local) |
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243 defer.returnValue(addresses) |
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244 |
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245 @defer.inlineCallbacks |
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246 def getExternalIP(self, profile): |
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247 """Try to discover external IP |
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248 |
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249 @param profile: %(doc_profile)s |
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250 @return (deferred): external IP address or None if it can't be discovered |
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251 """ |
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252 if self._external_ip_cache is not None: |
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253 defer.returnValue(self._external_ip_cache) |
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254 |
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255 # we first try with XEP-0279 |
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256 ip_check = yield self.host.hasFeature(NS_IP_CHECK, profile=profile) |
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257 if ip_check: |
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258 log.debug(u"Server IP Check available, we use it to retrieve our IP") |
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259 client = self.host.getClient(profile) |
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260 iq_elt = client.IQ("get") |
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261 iq_elt.addElement((NS_IP_CHECK, 'address')) |
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262 try: |
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263 result_elt = yield iq_elt.send() |
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264 address_elt = result_elt.elements(NS_IP_CHECK, 'address').next() |
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265 ip_elt = address_elt.elements(NS_IP_CHECK,'ip').next() |
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266 except StopIteration: |
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267 log.warning(u"Server returned invalid result on XEP-0279 request, we ignore it") |
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268 except StanzaError as e: |
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269 log.warning(u"error while requesting ip to server: {}".format(e)) |
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270 else: |
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271 # FIXME: server IP may not be the same as external IP (server can be on local machine or network) |
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272 # IP should be checked to see if we have a local one, and rejected in this case |
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273 external_ip = str(ip_elt) |
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274 log.debug(u"External IP found: {}".format(external_ip)) |
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275 self._external_ip_cache = external_ip |
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276 defer.returnValue(self._external_ip_cache) |
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277 |
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278 # then with NAT-Port |
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279 if self._nat is not None: |
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280 nat_ip = yield self._nat.getIP() |
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281 if nat_ip is not None: |
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282 self._external_ip_cache = nat_ip |
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283 defer.returnValue(nat_ip) |
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284 |
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285 # and finally by requesting external website |
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286 allow_get_ip = yield self._externalAllowed(profile) |
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287 try: |
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288 ip = (yield webclient.getPage(GET_IP_PAGE)) if allow_get_ip else None |
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289 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
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290 log.warning(u"Can't access Domain Name System") |
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291 ip = None |
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292 else: |
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293 self._external_ip_cache = ip |
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294 defer.returnValue(ip) |
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295 |
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296 |
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297 class IPPlugin_handler(XMPPHandler): |
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298 implements(iwokkel.IDisco) |
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299 |
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300 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
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301 return [disco.DiscoFeature(NS_IP_CHECK)] |
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302 |
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303 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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304 return [] |