Mercurial > libervia-backend
annotate sat/plugins/plugin_exp_jingle_stream.py @ 3160:330a5f1d9eea
core (memory/crypto): replaced `PyCrypto` by `cryptography`:
`PyCrypto` is unmaintained for years but was used in SàT for password hashing. This patch
fixes that by replacing `PyCrypto` by the reference `cryptography` module which is well
maintained.
The behaviour stays the same (except that previously async `hash`, `encrypt` and `decrypt`
methods are now synchronous, as they are quick and using a deferToThread may actually be
more resource intensive than using blocking methods).
It is planed to improve `memory.crypto` by using more up-to-date cryptography/hashing
algorithms in the future.
PyCrypto is no more a dependency of SàT
author | Goffi <goffi@goffi.org> |
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date | Sun, 09 Feb 2020 23:50:26 +0100 |
parents | 559a625a236b |
children | 26a0af6e32c1 |
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 managing pipes (experimental) |
3136 | 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 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 import exceptions |
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23 from sat.core.log import getLogger |
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24 |
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25 log = getLogger(__name__) |
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26 from sat.tools import xml_tools |
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27 from sat.tools import stream |
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28 from twisted.words.xish import domish |
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29 from twisted.words.protocols.jabber import jid |
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30 from twisted.internet import defer |
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31 from twisted.internet import protocol |
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32 from twisted.internet import endpoints |
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33 from twisted.internet import reactor |
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34 from twisted.internet import error |
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35 from twisted.internet import interfaces |
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36 from zope import interface |
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37 import errno |
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38 |
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39 NS_STREAM = "http://salut-a-toi.org/protocol/stream" |
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40 SECURITY_LIMIT = 30 |
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41 START_PORT = 8888 |
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42 |
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43 PLUGIN_INFO = { |
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44 C.PI_NAME: "Jingle Stream Plugin", |
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45 C.PI_IMPORT_NAME: "STREAM", |
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46 C.PI_TYPE: "EXP", |
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47 C.PI_PROTOCOLS: [], |
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48 C.PI_DEPENDENCIES: ["XEP-0166"], |
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49 C.PI_MAIN: "JingleStream", |
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50 C.PI_HANDLER: "no", |
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51 C.PI_DESCRIPTION: _("""Jingle Stream plugin"""), |
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52 } |
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53 |
3028 | 54 CONFIRM = D_("{peer} wants to send you a stream, do you accept ?") |
55 CONFIRM_TITLE = D_("Stream Request") | |
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56 |
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57 |
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58 class StreamProtocol(protocol.Protocol): |
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59 def __init__(self): |
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60 self.pause = False |
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61 |
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62 def setPause(self, paused): |
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63 # in Python 2.x, Twisted classes are old style |
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64 # so we can use property and setter |
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65 if paused: |
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66 if not self.pause: |
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67 self.transport.pauseProducing() |
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68 self.pause = True |
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69 else: |
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70 if self.pause: |
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71 self.transport.resumeProducing() |
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72 self.pause = False |
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73 |
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74 def disconnect(self): |
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75 self.transport.loseConnection() |
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76 |
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77 def connectionMade(self): |
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78 if self.factory.client_conn is not None: |
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79 self.transport.loseConnection() |
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80 self.factory.setClientConn(self) |
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81 |
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82 def dataReceived(self, data): |
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83 self.factory.writeToConsumer(data) |
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84 |
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85 def sendData(self, data): |
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86 self.transport.write(data) |
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87 |
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88 def connectionLost(self, reason): |
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89 if self.factory.client_conn != self: |
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90 # only the first connected client_conn is relevant |
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91 return |
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92 |
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93 if reason.type == error.ConnectionDone: |
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94 self.factory.streamFinished() |
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95 else: |
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96 self.factory.streamFailed(reason) |
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97 |
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98 |
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99 @interface.implementer(stream.IStreamProducer) |
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100 @interface.implementer(interfaces.IPushProducer) |
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101 @interface.implementer(interfaces.IConsumer) |
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102 class StreamFactory(protocol.Factory): |
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103 protocol = StreamProtocol |
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104 consumer = None |
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105 producer = None |
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106 deferred = None |
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107 |
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108 def __init__(self): |
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109 self.client_conn = None |
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110 |
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111 def setClientConn(self, stream_protocol): |
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112 # in Python 2.x, Twisted classes are old style |
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113 # so we can use property and setter |
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114 assert self.client_conn is None |
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115 self.client_conn = stream_protocol |
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116 if self.consumer is None: |
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117 self.client_conn.setPause(True) |
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118 |
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119 def startStream(self, consumer): |
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120 if self.consumer is not None: |
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121 raise exceptions.InternalError( |
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123 ) |
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124 assert self.deferred is None |
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125 self.consumer = consumer |
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126 consumer.registerProducer(self, True) |
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127 self.deferred = defer.Deferred() |
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128 if self.client_conn is not None: |
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129 self.client_conn.setPause(False) |
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130 return self.deferred |
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131 |
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132 def streamFinished(self): |
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133 self.client_conn = None |
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134 if self.consumer: |
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135 self.consumer.unregisterProducer() |
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136 self.port_listening.stopListening() |
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137 self.deferred.callback(None) |
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138 |
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139 def streamFailed(self, failure_): |
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140 self.client_conn = None |
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141 if self.consumer: |
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142 self.consumer.unregisterProducer() |
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143 self.port_listening.stopListening() |
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144 self.deferred.errback(failure_) |
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145 elif self.producer: |
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146 self.producer.stopProducing() |
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147 |
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148 def stopStream(self): |
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149 if self.client_conn is not None: |
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150 self.client_conn.disconnect() |
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151 |
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152 def registerProducer(self, producer, streaming): |
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153 self.producer = producer |
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154 |
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155 def pauseProducing(self): |
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156 self.client_conn.setPause(True) |
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157 |
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158 def resumeProducing(self): |
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159 self.client_conn.setPause(False) |
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160 |
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161 def stopProducing(self): |
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162 if self.client_conn: |
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163 self.client_conn.disconnect() |
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164 |
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165 def write(self, data): |
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166 try: |
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167 self.client_conn.sendData(data) |
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168 except AttributeError: |
3028 | 169 log.warning(_("No client connected, can't send data")) |
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170 |
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171 def writeToConsumer(self, data): |
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172 self.consumer.write(data) |
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173 |
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174 |
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175 class JingleStream(object): |
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176 """This non standard jingle application send byte stream""" |
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177 |
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178 def __init__(self, host): |
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179 log.info(_("Plugin Stream initialization")) |
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180 self.host = host |
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181 self._j = host.plugins["XEP-0166"] # shortcut to access jingle |
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182 self._j.registerApplication(NS_STREAM, self) |
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183 host.bridge.addMethod( |
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184 "streamOut", |
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185 ".plugin", |
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186 in_sign="ss", |
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187 out_sign="s", |
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188 method=self._streamOut, |
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190 ) |
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191 |
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192 # jingle callbacks |
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193 |
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194 def _streamOut(self, to_jid_s, profile_key): |
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195 client = self.host.getClient(profile_key) |
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196 return self.streamOut(client, jid.JID(to_jid_s)) |
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197 |
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198 @defer.inlineCallbacks |
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199 def streamOut(self, client, to_jid): |
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200 """send a stream |
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201 |
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202 @param peer_jid(jid.JID): recipient |
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203 @return: an unique id to identify the transfer |
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204 """ |
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205 port = START_PORT |
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206 factory = StreamFactory() |
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207 while True: |
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208 endpoint = endpoints.TCP4ServerEndpoint(reactor, port) |
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209 try: |
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210 port_listening = yield endpoint.listen(factory) |
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211 except error.CannotListenError as e: |
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212 if e.socketError.errno == errno.EADDRINUSE: |
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213 port += 1 |
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214 else: |
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215 raise e |
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216 else: |
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217 factory.port_listening = port_listening |
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218 break |
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219 self._j.initiate( |
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220 client, |
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221 to_jid, |
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222 [ |
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223 { |
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224 "app_ns": NS_STREAM, |
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225 "senders": self._j.ROLE_INITIATOR, |
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226 "app_kwargs": {"stream_object": factory}, |
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227 } |
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228 ], |
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229 ) |
3028 | 230 defer.returnValue(str(port)) |
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231 |
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232 def jingleSessionInit(self, client, session, content_name, stream_object): |
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233 content_data = session["contents"][content_name] |
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234 application_data = content_data["application_data"] |
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235 assert "stream_object" not in application_data |
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236 application_data["stream_object"] = stream_object |
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237 desc_elt = domish.Element((NS_STREAM, "description")) |
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238 return desc_elt |
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239 |
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240 @defer.inlineCallbacks |
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241 def jingleRequestConfirmation(self, client, action, session, content_name, desc_elt): |
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242 """This method request confirmation for a jingle session""" |
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243 content_data = session["contents"][content_name] |
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244 if content_data["senders"] not in ( |
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245 self._j.ROLE_INITIATOR, |
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246 self._j.ROLE_RESPONDER, |
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247 ): |
3028 | 248 log.warning("Bad sender, assuming initiator") |
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249 content_data["senders"] = self._j.ROLE_INITIATOR |
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250 |
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251 confirm_data = yield xml_tools.deferDialog( |
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252 self.host, |
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253 _(CONFIRM).format(peer=session["peer_jid"].full()), |
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254 _(CONFIRM_TITLE), |
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255 type_=C.XMLUI_DIALOG_CONFIRM, |
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256 action_extra={ |
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257 "meta_from_jid": session["peer_jid"].full(), |
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258 "meta_type": "STREAM", |
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259 }, |
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260 security_limit=SECURITY_LIMIT, |
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261 profile=client.profile, |
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262 ) |
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263 |
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264 if not C.bool(confirm_data["answer"]): |
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265 defer.returnValue(False) |
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266 try: |
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267 port = int(confirm_data["port"]) |
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268 except (ValueError, KeyError): |
3028 | 269 raise exceptions.DataError(_("given port is invalid")) |
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270 endpoint = endpoints.TCP4ClientEndpoint(reactor, "localhost", port) |
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271 factory = StreamFactory() |
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272 yield endpoint.connect(factory) |
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273 content_data["stream_object"] = factory |
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274 finished_d = content_data["finished_d"] = defer.Deferred() |
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275 args = [client, session, content_name, content_data] |
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276 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args) |
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277 defer.returnValue(True) |
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278 |
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279 def jingleHandler(self, client, action, session, content_name, desc_elt): |
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280 content_data = session["contents"][content_name] |
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281 application_data = content_data["application_data"] |
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282 if action in (self._j.A_ACCEPTED_ACK, self._j.A_SESSION_INITIATE): |
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283 pass |
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284 elif action == self._j.A_SESSION_ACCEPT: |
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285 assert not "stream_object" in content_data |
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286 content_data["stream_object"] = application_data["stream_object"] |
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287 finished_d = content_data["finished_d"] = defer.Deferred() |
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288 args = [client, session, content_name, content_data] |
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289 finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args) |
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290 else: |
3028 | 291 log.warning("FIXME: unmanaged action {}".format(action)) |
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292 return desc_elt |
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293 |
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294 def _finishedCb(self, __, client, session, content_name, content_data): |
3028 | 295 log.info("Pipe transfer completed") |
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296 self._j.contentTerminate(client, session, content_name) |
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297 content_data["stream_object"].stopStream() |
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298 |
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299 def _finishedEb(self, failure, client, session, content_name, content_data): |
3028 | 300 log.warning("Error while streaming pipe: {}".format(failure)) |
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301 self._j.contentTerminate( |
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302 client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT |
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303 ) |
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304 content_data["stream_object"].stopStream() |