Mercurial > libervia-backend
annotate sat/plugins/plugin_misc_ip.py @ 2617:81b70eeb710f
quick_frontend(contact list): refactored update:
update is now called with appropriate constant value (C.UPDATE_ADD, C.UPDATE_DELETE, C.UPDATE_MODIFY and so on) when a widget change visibility according to current options.
Before it was linked to cache only (C.UPDATE_ADD was only called when contact was first added to cache).
This make widget handling in frontends more easy.
Renamed entityToShow to entityVisible, which seems to correspond better.
Started reducing lines lenght to 90 chars as a test. May become the new coding style soon.
author | Goffi <goffi@goffi.org> |
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date | Sun, 24 Jun 2018 21:59:29 +0200 |
parents | 26edcf3a30eb |
children | 56f94936df1e |
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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 |
2483 | 5 # Copyright (C) 2009-2018 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_MODES: C.PLUG_MODE_BOTH, |
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49 C.PI_PROTOCOLS: ["XEP-0279"], |
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50 C.PI_RECOMMENDATIONS: ["NAT-PORT"], |
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51 C.PI_MAIN: "IPPlugin", |
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52 C.PI_HANDLER: "yes", |
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53 C.PI_DESCRIPTION: _("""This plugin help to discover our external IP address.""") |
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54 } |
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55 |
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56 # TODO: GET_IP_PAGE should be configurable in sat.conf |
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57 GET_IP_PAGE = "http://salut-a-toi.org/whereami/" # This page must only return external IP of the requester |
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58 GET_IP_LABEL = D_(u"Allow external get IP") |
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59 GET_IP_CATEGORY = "General" |
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60 GET_IP_NAME = "allow_get_ip" |
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61 GET_IP_CONFIRM_TITLE = D_(u"Confirm external site request") |
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62 GET_IP_CONFIRM = D_(u"""To facilitate data transfer, we need to contact a website. |
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63 A request will be done on {page} |
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64 That means that administrators of {domain} can know that you use "{app_name}" and your IP Address. |
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65 |
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66 IP address is an identifier to locate you on Internet (similar to a phone number). |
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67 |
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68 Do you agree to do this request ? |
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69 """).format( |
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70 page = GET_IP_PAGE, |
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71 domain = urlparse.urlparse(GET_IP_PAGE).netloc, |
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72 app_name = C.APP_NAME) |
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73 NS_IP_CHECK = "urn:xmpp:sic:1" |
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74 |
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75 PARAMS = """ |
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76 <params> |
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77 <general> |
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78 <category name="{category}"> |
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79 <param name="{name}" label="{label}" type="bool" /> |
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80 </category> |
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81 </general> |
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82 </params> |
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83 """.format(category=GET_IP_CATEGORY, name=GET_IP_NAME, label=GET_IP_LABEL) |
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84 |
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85 |
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86 class IPPlugin(object): |
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87 # TODO: refresh IP if a new connection is detected |
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88 # TODO: manage IPv6 when implemented in SàT |
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89 |
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90 def __init__(self, host): |
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91 log.info(_("plugin IP discovery initialization")) |
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92 self.host = host |
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93 host.memory.updateParams(PARAMS) |
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94 |
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95 # NAT-Port |
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96 try: |
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97 self._nat = host.plugins['NAT-PORT'] |
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98 except KeyError: |
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99 log.debug(u"NAT port plugin not available") |
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100 self._nat = None |
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101 |
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102 # XXX: cache is kept until SàT is restarted |
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103 # if IP may have changed, use self.refreshIP |
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104 self._external_ip_cache = None |
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105 self._local_ip_cache = None |
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106 |
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107 def getHandler(self, client): |
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108 return IPPlugin_handler() |
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109 |
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110 def refreshIP(self): |
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111 # FIXME: use a trigger instead ? |
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112 self._external_ip_cache = None |
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113 self._local_ip_cache = None |
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114 |
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115 def _externalAllowed(self, client): |
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116 """Return value of parameter with autorisation of user to do external requests |
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117 |
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118 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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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=client.profile) |
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131 d.addCallback(setParam) |
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132 return d |
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133 |
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134 return defer.succeed(allow_get_ip) |
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135 |
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136 def _filterAddresse(self, ip_addr): |
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137 """Filter acceptable addresses |
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138 |
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139 For now, just remove IPv4 local addresses |
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140 @param ip_addr(str): IP addresse |
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141 @return (bool): True if addresse is acceptable |
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142 """ |
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143 return not ip_addr.startswith('127.') |
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144 |
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145 def _insertFirst(self, addresses, ip_addr): |
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146 """Insert ip_addr as first item in addresses |
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147 |
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148 @param ip_addr(str): IP addresse |
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149 @param addresses(list): list of IP addresses |
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150 """ |
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151 if ip_addr in addresses: |
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152 if addresses[0] != ip_addr: |
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153 addresses.remove(ip_addr) |
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154 addresses.insert(0, ip_addr) |
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155 else: |
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156 addresses.insert(0, ip_addr) |
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157 |
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158 def _getIPFromExternal(self, ext_url): |
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159 """Get local IP by doing a connection on an external url |
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160 |
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161 @param ext_utl(str): url to connect to |
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162 @return (D(str)): return local IP |
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163 """ |
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164 url = urlparse.urlparse(ext_url) |
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165 port = url.port |
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166 if port is None: |
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167 if url.scheme=='http': |
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168 port = 80 |
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169 elif url.scheme=='https': |
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170 port = 443 |
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171 else: |
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172 log.error(u"Unknown url scheme: {}".format(url.scheme)) |
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173 defer.returnValue(None) |
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174 if url.hostname is None: |
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175 log.error(u"Can't find url hostname for {}".format(GET_IP_PAGE)) |
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176 |
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177 point = endpoints.TCP4ClientEndpoint(reactor, url.hostname, port) |
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178 def gotConnection(p): |
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179 local_ip = p.transport.getHost().host |
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180 p.transport.loseConnection() |
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181 return local_ip |
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182 |
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183 d = endpoints.connectProtocol(point, protocol.Protocol()) |
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184 d.addCallback(gotConnection) |
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185 return d |
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186 |
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187 @defer.inlineCallbacks |
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188 def getLocalIPs(self, client): |
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189 """Try do discover local area network IPs |
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190 |
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191 @return (deferred): list of lan IP addresses |
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192 if there are several addresses, the one used with the server is put first |
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193 if no address is found, localhost IP will be in the list |
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194 """ |
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195 # TODO: manage permission requesting (e.g. for UMTS link) |
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196 if self._local_ip_cache is not None: |
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197 defer.returnValue(self._local_ip_cache) |
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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(client) |
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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, client): |
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247 """Try to discover external IP |
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248 |
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249 @return (deferred): external IP address or None if it can't be discovered |
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250 """ |
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251 if self._external_ip_cache is not None: |
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252 defer.returnValue(self._external_ip_cache) |
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253 |
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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(client, NS_IP_CHECK) |
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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 iq_elt = client.IQ("get") |
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260 iq_elt.addElement((NS_IP_CHECK, 'address')) |
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261 try: |
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262 result_elt = yield iq_elt.send() |
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263 address_elt = result_elt.elements(NS_IP_CHECK, 'address').next() |
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264 ip_elt = address_elt.elements(NS_IP_CHECK,'ip').next() |
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265 except StopIteration: |
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266 log.warning(u"Server returned invalid result on XEP-0279 request, we ignore it") |
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267 except StanzaError as e: |
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268 log.warning(u"error while requesting ip to server: {}".format(e)) |
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269 else: |
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270 # FIXME: server IP may not be the same as external IP (server can be on local machine or network) |
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271 # IP should be checked to see if we have a local one, and rejected in this case |
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272 external_ip = str(ip_elt) |
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273 log.debug(u"External IP found: {}".format(external_ip)) |
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274 self._external_ip_cache = external_ip |
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275 defer.returnValue(self._external_ip_cache) |
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276 |
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277 # then with NAT-Port |
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278 if self._nat is not None: |
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279 nat_ip = yield self._nat.getIP() |
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280 if nat_ip is not None: |
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281 self._external_ip_cache = nat_ip |
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282 defer.returnValue(nat_ip) |
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283 |
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284 # and finally by requesting external website |
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285 allow_get_ip = yield self._externalAllowed(client) |
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286 try: |
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287 ip = (yield webclient.getPage(GET_IP_PAGE)) if allow_get_ip else None |
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288 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
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289 log.warning(u"Can't access Domain Name System") |
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290 ip = None |
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291 except web_error.Error as e: |
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292 log.warning(u"Error while retrieving IP on {url}: {message}".format(url=GET_IP_PAGE, message=e)) |
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293 ip = None |
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294 else: |
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295 self._external_ip_cache = ip |
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296 defer.returnValue(ip) |
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297 |
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298 |
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299 class IPPlugin_handler(XMPPHandler): |
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300 implements(iwokkel.IDisco) |
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301 |
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302 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
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303 return [disco.DiscoFeature(NS_IP_CHECK)] |
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304 |
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305 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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306 return [] |