Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_misc_ip.py @ 4164:15482dc0b5d1
plugin XEP-0384: fix trigger used for OLDMEMO:
OLDMEMO was applied at the `send_message_data` trigger level, however this was missing
stanza constructed without message data (which is notably the case for XEP-0308). This has
been fixed by using the `send` trigger instead. As a side effect, the same code is now
used for TWOMEMO and OLDMEMO, making it simpler.
author | Goffi <goffi@goffi.org> |
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date | Tue, 28 Nov 2023 17:41:02 +0100 (13 months ago) |
parents | 4b842c1fb686 |
children | b86912d3fd33 |
rev | line source |
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3028 | 1 #!/usr/bin/env python3 |
3137 | 2 |
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3 |
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4 # SAT plugin for IP address discovery |
3479 | 5 # Copyright (C) 2009-2021 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 |
3028 | 20 import urllib.parse |
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21 from libervia.backend.core.i18n import _, D_ |
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22 from libervia.backend.core.constants import Const as C |
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23 from libervia.backend.core.log import getLogger |
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24 from libervia.backend.tools import xml_tools |
3028 | 25 from wokkel import disco, iwokkel |
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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 |
3028 | 33 from zope.interface import implementer |
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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 |
3028 | 36 |
37 log = getLogger(__name__) | |
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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( |
3028 | 43 "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 |
3028 | 64 GET_IP_LABEL = D_("Allow external get IP") |
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65 GET_IP_CATEGORY = "General" |
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66 GET_IP_NAME = "allow_get_ip" |
3028 | 67 GET_IP_CONFIRM_TITLE = D_("Confirm external site request") |
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68 GET_IP_CONFIRM = D_( |
3028 | 69 """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( |
3028 | 78 page=GET_IP_PAGE, domain=urllib.parse.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.update_params(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: |
3028 | 108 log.debug("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.refresh_ip |
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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 get_handler(self, client): |
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117 return IPPlugin_handler() |
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118 |
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119 def refresh_ip(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 _external_allowed(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.param_get_a( |
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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 param_set(allowed): |
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137 # FIXME: we need to use bool_const as param_set 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.param_set( |
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140 GET_IP_NAME, C.bool_const(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.defer_confirm( |
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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(param_set) |
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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 _filter_addresse(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 _insert_first(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 addresses(list): list of IP addresses |
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168 @param ip_addr(str): IP addresse |
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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 async def _get_ip_from_external(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 (str, None): return local IP, or None if it's not possible |
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182 """ |
3028 | 183 url = urllib.parse.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: |
3028 | 191 log.error("Unknown url scheme: {}".format(url.scheme)) |
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192 return None |
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193 if url.hostname is None: |
3028 | 194 log.error("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 p = await endpoints.connectProtocol(point, protocol.Protocol()) |
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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 @defer.inlineCallbacks |
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204 def get_local_i_ps(self, client): |
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205 """Try do discover local area network IPs |
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206 |
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207 @return (deferred): list of lan IP addresses |
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208 if there are several addresses, the one used with the server is put first |
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209 if no address is found, localhost IP will be in the list |
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210 """ |
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211 # TODO: manage permission requesting (e.g. for UMTS link) |
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212 if self._local_ip_cache is not None: |
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213 defer.returnValue(self._local_ip_cache) |
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214 addresses = [] |
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215 localhost = ["127.0.0.1"] |
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216 |
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217 # we first try our luck with netifaces |
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218 if netifaces is not None: |
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219 addresses = [] |
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220 for interface in netifaces.interfaces(): |
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221 if_addresses = netifaces.ifaddresses(interface) |
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222 try: |
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223 inet_list = if_addresses[netifaces.AF_INET] |
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224 except KeyError: |
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225 continue |
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226 for data in inet_list: |
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227 addresse = data["addr"] |
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228 if self._filter_addresse(addresse): |
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229 addresses.append(addresse) |
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230 |
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231 # then we use our connection to server |
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232 ip = client.xmlstream.transport.getHost().host |
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233 if self._filter_addresse(ip): |
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234 self._insert_first(addresses, ip) |
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235 defer.returnValue(addresses) |
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236 |
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237 # if server is local, we try with NAT-Port |
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238 if self._nat is not None: |
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239 nat_ip = yield self._nat.get_ip(local=True) |
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240 if nat_ip is not None: |
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241 self._insert_first(addresses, nat_ip) |
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242 defer.returnValue(addresses) |
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243 |
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244 if addresses: |
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245 defer.returnValue(addresses) |
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246 |
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247 # still not luck, we need to contact external website |
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248 allow_get_ip = yield self._external_allowed(client) |
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249 |
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250 if not allow_get_ip: |
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251 defer.returnValue(addresses or localhost) |
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252 |
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253 try: |
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254 local_ip = yield defer.ensureDeferred(self._get_ip_from_external(GET_IP_PAGE)) |
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255 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
3028 | 256 log.warning("Can't access Domain Name System") |
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257 else: |
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258 if local_ip is not None: |
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259 self._insert_first(addresses, local_ip) |
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260 |
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261 defer.returnValue(addresses or localhost) |
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262 |
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263 @defer.inlineCallbacks |
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264 def get_external_ip(self, client): |
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265 """Try to discover external IP |
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266 |
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267 @return (deferred): external IP address or None if it can't be discovered |
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268 """ |
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269 if self._external_ip_cache is not None: |
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270 defer.returnValue(self._external_ip_cache) |
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271 |
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272 # we first try with XEP-0279 |
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273 ip_check = yield self.host.hasFeature(client, NS_IP_CHECK) |
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274 if ip_check: |
3028 | 275 log.debug("Server IP Check available, we use it to retrieve our IP") |
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276 iq_elt = client.IQ("get") |
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277 iq_elt.addElement((NS_IP_CHECK, "address")) |
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278 try: |
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279 result_elt = yield iq_elt.send() |
3028 | 280 address_elt = next(result_elt.elements(NS_IP_CHECK, "address")) |
281 ip_elt = next(address_elt.elements(NS_IP_CHECK, "ip")) | |
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282 except StopIteration: |
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283 log.warning( |
3028 | 284 "Server returned invalid result on XEP-0279 request, we ignore it" |
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285 ) |
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286 except StanzaError as e: |
3028 | 287 log.warning("error while requesting ip to server: {}".format(e)) |
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288 else: |
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289 # FIXME: server IP may not be the same as external IP (server can be on local machine or network) |
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290 # IP should be checked to see if we have a local one, and rejected in this case |
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291 external_ip = str(ip_elt) |
3028 | 292 log.debug("External IP found: {}".format(external_ip)) |
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293 self._external_ip_cache = external_ip |
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294 defer.returnValue(self._external_ip_cache) |
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295 |
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296 # then with NAT-Port |
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297 if self._nat is not None: |
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298 nat_ip = yield self._nat.get_ip() |
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299 if nat_ip is not None: |
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300 self._external_ip_cache = nat_ip |
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301 defer.returnValue(nat_ip) |
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302 |
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303 # and finally by requesting external website |
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304 allow_get_ip = yield self._external_allowed(client) |
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305 try: |
3028 | 306 ip = ((yield webclient.getPage(GET_IP_PAGE.encode('utf-8'))) |
307 if allow_get_ip else None) | |
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308 except (internet_error.DNSLookupError, internet_error.TimeoutError): |
3028 | 309 log.warning("Can't access Domain Name System") |
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310 ip = None |
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311 except web_error.Error as e: |
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312 log.warning( |
3028 | 313 "Error while retrieving IP on {url}: {message}".format( |
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314 url=GET_IP_PAGE, message=e |
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315 ) |
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316 ) |
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317 ip = None |
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318 else: |
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319 self._external_ip_cache = ip |
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320 defer.returnValue(ip) |
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321 |
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322 |
3028 | 323 @implementer(iwokkel.IDisco) |
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324 class IPPlugin_handler(XMPPHandler): |
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325 |
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326 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
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327 return [disco.DiscoFeature(NS_IP_CHECK)] |
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328 |
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329 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
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330 return [] |