Mercurial > libervia-backend
annotate sat/plugins/plugin_misc_ip.py @ 2962:b2c9b85372de
install: updated minimal version for sat_tmp and urwid-satext
author | Goffi <goffi@goffi.org> |
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date | Wed, 19 Jun 2019 20:07:56 +0200 |
parents | 003b8b4b56a7 |
children | ab2696e34d29 |
rev | line source |
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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 |
2771 | 5 # Copyright (C) 2009-2019 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 |
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24 log = getLogger(__name__) |
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25 from sat.tools import xml_tools |
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26 from twisted.web import client as webclient |
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27 from twisted.web import error as web_error |
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28 from twisted.internet import defer |
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29 from twisted.internet import reactor |
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30 from twisted.internet import protocol |
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31 from twisted.internet import endpoints |
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32 from twisted.internet import error as internet_error |
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33 from zope.interface import implements |
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34 from wokkel import disco, iwokkel |
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35 from twisted.words.protocols.jabber.xmlstream import XMPPHandler |
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36 from twisted.words.protocols.jabber.error import StanzaError |
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37 import urlparse |
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38 |
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39 try: |
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40 import netifaces |
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41 except ImportError: |
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42 log.warning( |
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43 u"netifaces is not available, it help discovering IPs, you can install it on https://pypi.python.org/pypi/netifaces" |
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44 ) |
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45 netifaces = None |
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46 |
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47 |
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48 PLUGIN_INFO = { |
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49 C.PI_NAME: "IP discovery", |
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50 C.PI_IMPORT_NAME: "IP", |
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51 C.PI_TYPE: C.PLUG_TYPE_MISC, |
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52 C.PI_MODES: C.PLUG_MODE_BOTH, |
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53 C.PI_PROTOCOLS: ["XEP-0279"], |
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54 C.PI_RECOMMENDATIONS: ["NAT-PORT"], |
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55 C.PI_MAIN: "IPPlugin", |
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56 C.PI_HANDLER: "yes", |
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57 C.PI_DESCRIPTION: _("""This plugin help to discover our external IP address."""), |
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58 } |
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59 |
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60 # TODO: GET_IP_PAGE should be configurable in sat.conf |
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61 GET_IP_PAGE = ( |
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62 "http://salut-a-toi.org/whereami/" |
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63 ) # This page must only return external IP of the requester |
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64 GET_IP_LABEL = D_(u"Allow external get IP") |
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65 GET_IP_CATEGORY = "General" |
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66 GET_IP_NAME = "allow_get_ip" |
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67 GET_IP_CONFIRM_TITLE = D_(u"Confirm external site request") |
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68 GET_IP_CONFIRM = D_( |
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69 u"""To facilitate data transfer, we need to contact a website. |
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70 A request will be done on {page} |
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71 That means that administrators of {domain} can know that you use "{app_name}" and your IP Address. |
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72 |
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73 IP address is an identifier to locate you on Internet (similar to a phone number). |
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74 |
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75 Do you agree to do this request ? |
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76 """ |
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77 ).format( |
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78 page=GET_IP_PAGE, domain=urlparse.urlparse(GET_IP_PAGE).netloc, app_name=C.APP_NAME |
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79 ) |
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80 NS_IP_CHECK = "urn:xmpp:sic:1" |
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81 |
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82 PARAMS = """ |
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83 <params> |
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84 <general> |
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85 <category name="{category}"> |
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86 <param name="{name}" label="{label}" type="bool" /> |
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87 </category> |
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88 </general> |
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89 </params> |
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90 """.format( |
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91 category=GET_IP_CATEGORY, name=GET_IP_NAME, label=GET_IP_LABEL |
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92 ) |
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93 |
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94 |
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95 class IPPlugin(object): |
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96 # TODO: refresh IP if a new connection is detected |
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97 # TODO: manage IPv6 when implemented in SàT |
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98 |
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99 def __init__(self, host): |
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100 log.info(_("plugin IP discovery initialization")) |
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101 self.host = host |
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102 host.memory.updateParams(PARAMS) |
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103 |
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104 # NAT-Port |
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105 try: |
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106 self._nat = host.plugins["NAT-PORT"] |
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107 except KeyError: |
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108 log.debug(u"NAT port plugin not available") |
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109 self._nat = None |
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110 |
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111 # XXX: cache is kept until SàT is restarted |
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112 # if IP may have changed, use self.refreshIP |
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113 self._external_ip_cache = None |
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114 self._local_ip_cache = None |
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115 |
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116 def getHandler(self, client): |
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117 return IPPlugin_handler() |
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118 |
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119 def refreshIP(self): |
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120 # FIXME: use a trigger instead ? |
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121 self._external_ip_cache = None |
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122 self._local_ip_cache = None |
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123 |
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124 def _externalAllowed(self, client): |
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125 """Return value of parameter with autorisation of user to do external requests |
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126 |
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127 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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128 @return (defer.Deferred[bool]): True if external request is autorised |
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129 """ |
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130 allow_get_ip = self.host.memory.params.getParamA( |
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131 GET_IP_NAME, GET_IP_CATEGORY, use_default=False |
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132 ) |
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133 |
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134 if allow_get_ip is None: |
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135 # we don't have autorisation from user yet to use get_ip, we ask him |
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136 def setParam(allowed): |
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137 # FIXME: we need to use boolConst as setParam only manage str/unicode |
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138 # need to be fixed when params will be refactored |
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139 self.host.memory.setParam( |
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140 GET_IP_NAME, C.boolConst(allowed), GET_IP_CATEGORY |
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141 ) |
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142 return allowed |
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143 |
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144 d = xml_tools.deferConfirm( |
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145 self.host, |
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146 _(GET_IP_CONFIRM), |
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147 _(GET_IP_CONFIRM_TITLE), |
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148 profile=client.profile, |
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149 ) |
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150 d.addCallback(setParam) |
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151 return d |
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152 |
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153 return defer.succeed(allow_get_ip) |
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154 |
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155 def _filterAddresse(self, ip_addr): |
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156 """Filter acceptable addresses |
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157 |
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158 For now, just remove IPv4 local addresses |
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159 @param ip_addr(str): IP addresse |
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160 @return (bool): True if addresse is acceptable |
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161 """ |
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162 return not ip_addr.startswith("127.") |
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163 |
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164 def _insertFirst(self, addresses, ip_addr): |
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165 """Insert ip_addr as first item in addresses |
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166 |
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167 @param ip_addr(str): IP addresse |
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168 @param addresses(list): list of IP addresses |
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169 """ |
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170 if ip_addr in addresses: |
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171 if addresses[0] != ip_addr: |
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172 addresses.remove(ip_addr) |
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173 addresses.insert(0, ip_addr) |
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174 else: |
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175 addresses.insert(0, ip_addr) |
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176 |
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177 def _getIPFromExternal(self, ext_url): |
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178 """Get local IP by doing a connection on an external url |
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179 |
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180 @param ext_utl(str): url to connect to |
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181 @return (D(str)): return local IP |
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182 """ |
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183 url = urlparse.urlparse(ext_url) |
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184 port = url.port |
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185 if port is None: |
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186 if url.scheme == "http": |
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187 port = 80 |
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188 elif url.scheme == "https": |
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189 port = 443 |
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190 else: |
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191 log.error(u"Unknown url scheme: {}".format(url.scheme)) |
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192 defer.returnValue(None) |
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193 if url.hostname is None: |
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194 log.error(u"Can't find url hostname for {}".format(GET_IP_PAGE)) |
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195 |
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196 point = endpoints.TCP4ClientEndpoint(reactor, url.hostname, port) |
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197 |
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198 def gotConnection(p): |
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199 local_ip = p.transport.getHost().host |
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200 p.transport.loseConnection() |
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201 return local_ip |
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202 |
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203 d = endpoints.connectProtocol(point, protocol.Protocol()) |
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204 d.addCallback(gotConnection) |
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205 return d |
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206 |
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207 @defer.inlineCallbacks |
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208 def getLocalIPs(self, client): |
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209 """Try do discover local area network IPs |
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210 |
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211 @return (deferred): list of lan IP addresses |
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212 if there are several addresses, the one used with the server is put first |
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213 if no address is found, localhost IP will be in the list |
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214 """ |
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215 # TODO: manage permission requesting (e.g. for UMTS link) |
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216 if self._local_ip_cache is not None: |
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217 defer.returnValue(self._local_ip_cache) |
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218 addresses = [] |
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219 localhost = ["127.0.0.1"] |
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220 |
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221 # we first try our luck with netifaces |
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222 if netifaces is not None: |
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223 addresses = [] |
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224 for interface in netifaces.interfaces(): |
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225 if_addresses = netifaces.ifaddresses(interface) |
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226 try: |
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227 inet_list = if_addresses[netifaces.AF_INET] |
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228 except KeyError: |
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229 continue |
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230 for data in inet_list: |
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231 addresse = data["addr"] |
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232 if self._filterAddresse(addresse): |
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233 addresses.append(addresse) |
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234 |
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235 # then we use our connection to server |
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236 ip = client.xmlstream.transport.getHost().host |
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237 if self._filterAddresse(ip): |
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238 self._insertFirst(addresses, ip) |
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239 defer.returnValue(addresses) |
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240 |
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241 # if server is local, we try with NAT-Port |
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242 if self._nat is not None: |
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243 nat_ip = yield self._nat.getIP(local=True) |
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244 if nat_ip is not None: |
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245 self._insertFirst(addresses, nat_ip) |
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246 defer.returnValue(addresses) |
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247 |
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248 if addresses: |
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249 defer.returnValue(addresses) |
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250 |
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251 # still not luck, we need to contact external website |
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252 allow_get_ip = yield self._externalAllowed(client) |
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253 |
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254 if not allow_get_ip: |
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255 defer.returnValue(addresses or localhost) |
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256 |
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257 try: |
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258 ip_tuple = yield self._getIPFromExternal(GET_IP_PAGE) |
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259 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
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260 log.warning(u"Can't access Domain Name System") |
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261 defer.returnValue(addresses or localhost) |
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262 self._insertFirst(addresses, ip_tuple.local) |
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263 defer.returnValue(addresses) |
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264 |
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265 @defer.inlineCallbacks |
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266 def getExternalIP(self, client): |
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267 """Try to discover external IP |
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268 |
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269 @return (deferred): external IP address or None if it can't be discovered |
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270 """ |
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271 if self._external_ip_cache is not None: |
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272 defer.returnValue(self._external_ip_cache) |
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273 |
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274 # we first try with XEP-0279 |
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275 ip_check = yield self.host.hasFeature(client, NS_IP_CHECK) |
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276 if ip_check: |
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277 log.debug(u"Server IP Check available, we use it to retrieve our IP") |
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278 iq_elt = client.IQ("get") |
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279 iq_elt.addElement((NS_IP_CHECK, "address")) |
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280 try: |
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281 result_elt = yield iq_elt.send() |
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282 address_elt = result_elt.elements(NS_IP_CHECK, "address").next() |
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283 ip_elt = address_elt.elements(NS_IP_CHECK, "ip").next() |
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284 except StopIteration: |
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285 log.warning( |
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286 u"Server returned invalid result on XEP-0279 request, we ignore it" |
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287 ) |
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288 except StanzaError as e: |
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289 log.warning(u"error while requesting ip to server: {}".format(e)) |
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290 else: |
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291 # FIXME: server IP may not be the same as external IP (server can be on local machine or network) |
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292 # IP should be checked to see if we have a local one, and rejected in this case |
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293 external_ip = str(ip_elt) |
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294 log.debug(u"External IP found: {}".format(external_ip)) |
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295 self._external_ip_cache = external_ip |
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296 defer.returnValue(self._external_ip_cache) |
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297 |
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298 # then with NAT-Port |
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299 if self._nat is not None: |
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300 nat_ip = yield self._nat.getIP() |
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301 if nat_ip is not None: |
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302 self._external_ip_cache = nat_ip |
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303 defer.returnValue(nat_ip) |
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304 |
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305 # and finally by requesting external website |
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306 allow_get_ip = yield self._externalAllowed(client) |
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307 try: |
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308 ip = (yield webclient.getPage(GET_IP_PAGE)) if allow_get_ip else None |
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309 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
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310 log.warning(u"Can't access Domain Name System") |
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311 ip = None |
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312 except web_error.Error as e: |
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313 log.warning( |
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314 u"Error while retrieving IP on {url}: {message}".format( |
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315 url=GET_IP_PAGE, message=e |
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316 ) |
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317 ) |
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318 ip = None |
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319 else: |
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320 self._external_ip_cache = ip |
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321 defer.returnValue(ip) |
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322 |
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323 |
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324 class IPPlugin_handler(XMPPHandler): |
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325 implements(iwokkel.IDisco) |
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326 |
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327 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
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328 return [disco.DiscoFeature(NS_IP_CHECK)] |
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329 |
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330 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
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331 return [] |