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annotate sat/plugins/plugin_exp_jingle_stream.py @ 3405:ecdb3728749e

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plugin XEP-0353: Jingle Message Initiation implementation: This plugin uses the new `XEP-0166_initiate` trigger to initiate a Jingle session with messages if the peer jid has no resource specified. On reception, if the sender is not in our roster, a confirmation is requested to user to avoid leaking presence and IP. If user refuses the session for somebody not in roster, nothing is sent at all (the request is just ignored).
author Goffi <goffi@goffi.org>
date Thu, 12 Nov 2020 14:53:15 +0100
parents 26a0af6e32c1
children be6d91572633
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for managing pipes (experimental)
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5 # Copyright (C) 2009-2020 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 import errno
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21 from zope import interface
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22 from twisted.words.xish import domish
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23 from twisted.words.protocols.jabber import jid
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24 from twisted.internet import defer
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25 from twisted.internet import protocol
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26 from twisted.internet import endpoints
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27 from twisted.internet import reactor
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28 from twisted.internet import error
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29 from twisted.internet import interfaces
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30 from sat.core.i18n import _, D_
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31 from sat.core.constants import Const as C
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32 from sat.core import exceptions
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33 from sat.core.log import getLogger
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34 from sat.tools import xml_tools
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35 from sat.tools import stream
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36
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37
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38 log = getLogger(__name__)
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39
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40 NS_STREAM = "http://salut-a-toi.org/protocol/stream"
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41 SECURITY_LIMIT = 30
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42 START_PORT = 8888
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43
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44 PLUGIN_INFO = {
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45 C.PI_NAME: "Jingle Stream Plugin",
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46 C.PI_IMPORT_NAME: "STREAM",
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47 C.PI_TYPE: "EXP",
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48 C.PI_PROTOCOLS: [],
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49 C.PI_DEPENDENCIES: ["XEP-0166"],
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50 C.PI_MAIN: "JingleStream",
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51 C.PI_HANDLER: "no",
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52 C.PI_DESCRIPTION: _("""Jingle Stream plugin"""),
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53 }
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54
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55 CONFIRM = D_("{peer} wants to send you a stream, do you accept ?")
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56 CONFIRM_TITLE = D_("Stream Request")
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57
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58
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59 class StreamProtocol(protocol.Protocol):
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60 def __init__(self):
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61 self.pause = False
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62
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63 def setPause(self, paused):
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64 # in Python 2.x, Twisted classes are old style
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65 # so we can use property and setter
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66 if paused:
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67 if not self.pause:
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68 self.transport.pauseProducing()
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69 self.pause = True
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70 else:
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71 if self.pause:
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72 self.transport.resumeProducing()
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73 self.pause = False
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74
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75 def disconnect(self):
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76 self.transport.loseConnection()
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77
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78 def connectionMade(self):
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79 if self.factory.client_conn is not None:
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80 self.transport.loseConnection()
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81 self.factory.setClientConn(self)
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82
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83 def dataReceived(self, data):
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84 self.factory.writeToConsumer(data)
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85
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86 def sendData(self, data):
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87 self.transport.write(data)
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88
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89 def connectionLost(self, reason):
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90 if self.factory.client_conn != self:
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91 # only the first connected client_conn is relevant
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92 return
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93
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94 if reason.type == error.ConnectionDone:
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95 self.factory.streamFinished()
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96 else:
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97 self.factory.streamFailed(reason)
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98
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99
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100 @interface.implementer(stream.IStreamProducer)
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101 @interface.implementer(interfaces.IPushProducer)
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102 @interface.implementer(interfaces.IConsumer)
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103 class StreamFactory(protocol.Factory):
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104 protocol = StreamProtocol
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105 consumer = None
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106 producer = None
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107 deferred = None
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108
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109 def __init__(self):
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110 self.client_conn = None
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111
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112 def setClientConn(self, stream_protocol):
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113 # in Python 2.x, Twisted classes are old style
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114 # so we can use property and setter
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115 assert self.client_conn is None
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116 self.client_conn = stream_protocol
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117 if self.consumer is None:
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118 self.client_conn.setPause(True)
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119
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120 def startStream(self, consumer):
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121 if self.consumer is not None:
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122 raise exceptions.InternalError(
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123 _("stream can't be used with multiple consumers")
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124 )
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125 assert self.deferred is None
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126 self.consumer = consumer
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127 consumer.registerProducer(self, True)
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128 self.deferred = defer.Deferred()
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129 if self.client_conn is not None:
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130 self.client_conn.setPause(False)
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131 return self.deferred
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132
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133 def streamFinished(self):
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134 self.client_conn = None
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135 if self.consumer:
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136 self.consumer.unregisterProducer()
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137 self.port_listening.stopListening()
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138 self.deferred.callback(None)
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139
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140 def streamFailed(self, failure_):
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141 self.client_conn = None
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142 if self.consumer:
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143 self.consumer.unregisterProducer()
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144 self.port_listening.stopListening()
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145 self.deferred.errback(failure_)
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146 elif self.producer:
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147 self.producer.stopProducing()
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148
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149 def stopStream(self):
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150 if self.client_conn is not None:
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151 self.client_conn.disconnect()
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152
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153 def registerProducer(self, producer, streaming):
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154 self.producer = producer
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155
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156 def pauseProducing(self):
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157 self.client_conn.setPause(True)
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158
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159 def resumeProducing(self):
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160 self.client_conn.setPause(False)
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161
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162 def stopProducing(self):
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Goffi <goffi@goffi.org>
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163 if self.client_conn:
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164 self.client_conn.disconnect()
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165
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166 def write(self, data):
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167 try:
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168 self.client_conn.sendData(data)
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169 except AttributeError:
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170 log.warning(_("No client connected, can't send data"))
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171
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172 def writeToConsumer(self, data):
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173 self.consumer.write(data)
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174
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175
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176 class JingleStream(object):
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177 """This non standard jingle application send byte stream"""
401
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parents:
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178
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179 def __init__(self, host):
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180 log.info(_("Plugin Stream initialization"))
401
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parents:
diff changeset
181 self.host = host
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182 self._j = host.plugins["XEP-0166"] # shortcut to access jingle
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183 self._j.registerApplication(NS_STREAM, self)
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diff changeset
184 host.bridge.addMethod(
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185 "streamOut",
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diff changeset
186 ".plugin",
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diff changeset
187 in_sign="ss",
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188 out_sign="s",
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189 method=self._streamOut,
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190 async_=True,
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191 )
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192
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193 # jingle callbacks
401
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194
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diff changeset
195 def _streamOut(self, to_jid_s, profile_key):
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196 client = self.host.getClient(profile_key)
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diff changeset
197 return defer.ensureDeferred(self.streamOut(client, jid.JID(to_jid_s)))
401
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parents:
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198
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199 async def streamOut(self, client, to_jid):
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200 """send a stream
401
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parents:
diff changeset
201
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202 @param peer_jid(jid.JID): recipient
401
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parents:
diff changeset
203 @return: an unique id to identify the transfer
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parents:
diff changeset
204 """
2489
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diff changeset
205 port = START_PORT
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
206 factory = StreamFactory()
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
207 while True:
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Goffi <goffi@goffi.org>
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diff changeset
208 endpoint = endpoints.TCP4ServerEndpoint(reactor, port)
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parents: 2483
diff changeset
209 try:
3404
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diff changeset
210 port_listening = await endpoint.listen(factory)
2489
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diff changeset
211 except error.CannotListenError as e:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
212 if e.socketError.errno == errno.EADDRINUSE:
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parents: 2483
diff changeset
213 port += 1
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
214 else:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
215 raise e
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
216 else:
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Goffi <goffi@goffi.org>
parents: 2483
diff changeset
217 factory.port_listening = port_listening
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Goffi <goffi@goffi.org>
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diff changeset
218 break
3404
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diff changeset
219 # we don't want to wait for IQ result of initiate
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diff changeset
220 defer.ensureDeferred(self._j.initiate(
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diff changeset
221 client,
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parents: 2562
diff changeset
222 to_jid,
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parents: 2562
diff changeset
223 [
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parents: 2562
diff changeset
224 {
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
225 "app_ns": NS_STREAM,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
226 "senders": self._j.ROLE_INITIATOR,
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parents: 2562
diff changeset
227 "app_kwargs": {"stream_object": factory},
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diff changeset
228 }
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parents: 2562
diff changeset
229 ],
3404
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parents: 3137
diff changeset
230 ))
26a0af6e32c1 plugin XEP-0166: new trigger point + coroutines + helper methods:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
231 return str(port)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
232
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diff changeset
233 def jingleSessionInit(self, client, session, content_name, stream_object):
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diff changeset
234 content_data = session["contents"][content_name]
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diff changeset
235 application_data = content_data["application_data"]
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
236 assert "stream_object" not in application_data
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parents: 2562
diff changeset
237 application_data["stream_object"] = stream_object
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diff changeset
238 desc_elt = domish.Element((NS_STREAM, "description"))
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697effba0310 plugin pipe: rewritten plugin as a jingle application. The current implentation can, in some cases, block the backend, and is experimental only. Improvments are needed in the future.
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
239 return desc_elt
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
240
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diff changeset
241 @defer.inlineCallbacks
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Goffi <goffi@goffi.org>
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diff changeset
242 def jingleRequestConfirmation(self, client, action, session, content_name, desc_elt):
1669
697effba0310 plugin pipe: rewritten plugin as a jingle application. The current implentation can, in some cases, block the backend, and is experimental only. Improvments are needed in the future.
Goffi <goffi@goffi.org>
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diff changeset
243 """This method request confirmation for a jingle session"""
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244 content_data = session["contents"][content_name]
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diff changeset
245 if content_data["senders"] not in (
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
246 self._j.ROLE_INITIATOR,
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Goffi <goffi@goffi.org>
parents: 2562
diff changeset
247 self._j.ROLE_RESPONDER,
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diff changeset
248 ):
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diff changeset
249 log.warning("Bad sender, assuming initiator")
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diff changeset
250 content_data["senders"] = self._j.ROLE_INITIATOR
587
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parents: 585
diff changeset
251
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diff changeset
252 confirm_data = yield xml_tools.deferDialog(
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parents: 2562
diff changeset
253 self.host,
56f94936df1e code style reformatting using black
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diff changeset
254 _(CONFIRM).format(peer=session["peer_jid"].full()),
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Goffi <goffi@goffi.org>
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diff changeset
255 _(CONFIRM_TITLE),
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diff changeset
256 type_=C.XMLUI_DIALOG_CONFIRM,
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257 action_extra={
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258 "meta_from_jid": session["peer_jid"].full(),
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259 "meta_type": "STREAM",
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260 },
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261 security_limit=SECURITY_LIMIT,
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262 profile=client.profile,
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263 )
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264
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265 if not C.bool(confirm_data["answer"]):
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266 defer.returnValue(False)
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267 try:
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268 port = int(confirm_data["port"])
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269 except (ValueError, KeyError):
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270 raise exceptions.DataError(_("given port is invalid"))
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271 endpoint = endpoints.TCP4ClientEndpoint(reactor, "localhost", port)
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272 factory = StreamFactory()
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273 yield endpoint.connect(factory)
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274 content_data["stream_object"] = factory
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275 finished_d = content_data["finished_d"] = defer.Deferred()
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276 args = [client, session, content_name, content_data]
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277 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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278 defer.returnValue(True)
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279
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280 def jingleHandler(self, client, action, session, content_name, desc_elt):
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281 content_data = session["contents"][content_name]
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282 application_data = content_data["application_data"]
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283 if action in (self._j.A_ACCEPTED_ACK, self._j.A_SESSION_INITIATE):
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284 pass
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285 elif action == self._j.A_SESSION_ACCEPT:
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286 assert not "stream_object" in content_data
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287 content_data["stream_object"] = application_data["stream_object"]
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288 finished_d = content_data["finished_d"] = defer.Deferred()
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289 args = [client, session, content_name, content_data]
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290 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
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291 else:
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292 log.warning("FIXME: unmanaged action {}".format(action))
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293 return desc_elt
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294
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295 def _finishedCb(self, __, client, session, content_name, content_data):
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296 log.info("Pipe transfer completed")
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297 self._j.contentTerminate(client, session, content_name)
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298 content_data["stream_object"].stopStream()
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299
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300 def _finishedEb(self, failure, client, session, content_name, content_data):
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301 log.warning("Error while streaming pipe: {}".format(failure))
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302 self._j.contentTerminate(
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303 client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT
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304 )
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305 content_data["stream_object"].stopStream()