Mercurial > libervia-backend
annotate sat/plugins/plugin_xep_0260.py @ 2671:0fa217fafabf
tools (common/template), jp: refactoring to handle multiple sites:
- site can now be specified in template header before theme, for instance: (some_site/some_theme)path/to/template.ext
- absolute template paths are now implemented, but Renderer must be instanciated with trusted to True for security reason (it's the case for jp)
- a new "front_url_filter" callable can be given to Renderer, which will convert template path to URL seen by end-user (default to real path).
- the "front_url_filter" can be used in templates with… "front_url" filter
- template_data is a new named tuple available in templates, which give site, theme and template relative URL
- search order is site/theme, site/default_theme, and default/default_theme where default link to sat_pubsub templates
- when loading CSS files, files with _noscript suffixes are now loaded, and used when javascript is not available
- "styles_extra.css" is also loaded before "styles.css", useful when a theme want to reuse default style, and just override some rules
- new site can be specified in sat.conf [DEFAULT] section, using sites_path_public_dict or sites_path_private_dict (where sites_path_private_dict won't be used in public frontends, like Libervia)
- "private" argument of Renderer tells the renderer to load private sites or not
- templates are now loaded from "templates" subdirectory, to differenciate them from other data like i18n
- jp template output has been updated to handle those changes, and to manage absolute templates
author | Goffi <goffi@goffi.org> |
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date | Mon, 10 Sep 2018 08:58:18 +0200 |
parents | 56f94936df1e |
children | 378188abe941 |
rev | line source |
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1 #!/usr/bin/env python2 |
1560 | 2 # -*- coding: utf-8 -*- |
3 | |
4 # SAT plugin for Jingle (XEP-0260) | |
2483 | 5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) |
1560 | 6 |
7 # This program is free software: you can redistribute it and/or modify | |
8 # it under the terms of the GNU Affero General Public License as published by | |
9 # the Free Software Foundation, either version 3 of the License, or | |
10 # (at your option) any later version. | |
11 | |
12 # This program is distributed in the hope that it will be useful, | |
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 # GNU Affero General Public License for more details. | |
16 | |
17 # You should have received a copy of the GNU Affero General Public License | |
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | |
20 from sat.core.i18n import _ | |
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21 from sat.core.constants import Const as C |
1560 | 22 from sat.core.log import getLogger |
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23 |
1560 | 24 log = getLogger(__name__) |
25 from sat.core import exceptions | |
26 from wokkel import disco, iwokkel | |
27 from zope.interface import implements | |
28 from twisted.words.xish import domish | |
29 from twisted.words.protocols.jabber import jid | |
30 from twisted.internet import defer | |
31 import uuid | |
32 | |
33 try: | |
34 from twisted.words.protocols.xmlstream import XMPPHandler | |
35 except ImportError: | |
36 from wokkel.subprotocols import XMPPHandler | |
37 | |
38 | |
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39 NS_JINGLE_S5B = "urn:xmpp:jingle:transports:s5b:1" |
1560 | 40 |
41 PLUGIN_INFO = { | |
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42 C.PI_NAME: "Jingle SOCKS5 Bytestreams", |
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43 C.PI_IMPORT_NAME: "XEP-0260", |
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44 C.PI_TYPE: "XEP", |
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45 C.PI_MODES: C.PLUG_MODE_BOTH, |
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46 C.PI_PROTOCOLS: ["XEP-0260"], |
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47 C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0065"], |
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48 C.PI_RECOMMENDATIONS: ["XEP-0261"], # needed for fallback |
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49 C.PI_MAIN: "XEP_0260", |
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50 C.PI_HANDLER: "yes", |
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51 C.PI_DESCRIPTION: _("""Implementation of Jingle SOCKS5 Bytestreams"""), |
1560 | 52 } |
53 | |
54 | |
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55 class ProxyError(Exception): |
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56 def __str__(self): |
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57 return "an error happened while trying to use the proxy" |
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58 |
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59 |
1560 | 60 class XEP_0260(object): |
61 # TODO: udp handling | |
62 | |
63 def __init__(self, host): | |
64 log.info(_("plugin Jingle SOCKS5 Bytestreams")) | |
65 self.host = host | |
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66 self._j = host.plugins["XEP-0166"] # shortcut to access jingle |
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67 self._s5b = host.plugins["XEP-0065"] # and socks5 bytestream |
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68 try: |
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69 self._jingle_ibb = host.plugins["XEP-0261"] |
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70 except KeyError: |
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71 self._jingle_ibb = None |
1560 | 72 self._j.registerTransport(NS_JINGLE_S5B, self._j.TRANSPORT_STREAMING, self, 100) |
73 | |
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74 def getHandler(self, client): |
1560 | 75 return XEP_0260_handler() |
76 | |
77 def _parseCandidates(self, transport_elt): | |
78 """Parse <candidate> elements | |
79 | |
80 @param transport_elt(domish.Element): parent <transport> element | |
81 @return (list[plugin_xep_0065.Candidate): list of parsed candidates | |
82 """ | |
83 candidates = [] | |
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84 for candidate_elt in transport_elt.elements(NS_JINGLE_S5B, "candidate"): |
1560 | 85 try: |
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86 cid = candidate_elt["cid"] |
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87 host = candidate_elt["host"] |
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88 jid_ = jid.JID(candidate_elt["jid"]) |
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89 port = int(candidate_elt.getAttribute("port", 1080)) |
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90 priority = int(candidate_elt["priority"]) |
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91 type_ = candidate_elt.getAttribute("type", self._s5b.TYPE_DIRECT) |
1560 | 92 except (KeyError, ValueError): |
93 raise exceptions.DataError() | |
94 candidate = self._s5b.Candidate(host, port, type_, priority, jid_, cid) | |
95 candidates.append(candidate) | |
96 # self._s5b.registerCandidate(candidate) | |
97 return candidates | |
98 | |
99 def _buildCandidates(self, session, candidates, sid, session_hash, client, mode=None): | |
100 """Build <transport> element with candidates | |
101 | |
102 @param session(dict): jingle session data | |
103 @param candidates(iterator[plugin_xep_0065.Candidate]): iterator of candidates to add | |
104 @param sid(unicode): transport stream id | |
105 @param client: %(doc_client)s | |
106 @param mode(str, None): 'tcp' or 'udp', or None to have no attribute | |
107 @return (domish.Element): parent <transport> element where <candidate> elements must be added | |
108 """ | |
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109 proxy = next( |
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110 ( |
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111 candidate |
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112 for candidate in candidates |
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113 if candidate.type == self._s5b.TYPE_PROXY |
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114 ), |
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115 None, |
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116 ) |
1560 | 117 transport_elt = domish.Element((NS_JINGLE_S5B, "transport")) |
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118 transport_elt["sid"] = sid |
1560 | 119 if proxy is not None: |
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120 transport_elt["dstaddr"] = session_hash |
1560 | 121 if mode is not None: |
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122 transport_elt["mode"] = "tcp" # XXX: we only manage tcp for now |
1560 | 123 |
124 for candidate in candidates: | |
125 log.debug(u"Adding candidate: {}".format(candidate)) | |
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126 candidate_elt = transport_elt.addElement("candidate", NS_JINGLE_S5B) |
1560 | 127 if candidate.id is None: |
128 candidate.id = unicode(uuid.uuid4()) | |
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129 candidate_elt["cid"] = candidate.id |
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130 candidate_elt["host"] = candidate.host |
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131 candidate_elt["jid"] = candidate.jid.full() |
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132 candidate_elt["port"] = unicode(candidate.port) |
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133 candidate_elt["priority"] = unicode(candidate.priority) |
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134 candidate_elt["type"] = candidate.type |
1560 | 135 return transport_elt |
136 | |
137 @defer.inlineCallbacks | |
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138 def jingleSessionInit(self, client, session, content_name): |
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139 content_data = session["contents"][content_name] |
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140 transport_data = content_data["transport_data"] |
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141 sid = transport_data["sid"] = unicode(uuid.uuid4()) |
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142 session_hash = transport_data["session_hash"] = self._s5b.getSessionHash( |
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143 client.jid, session["peer_jid"], sid |
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144 ) |
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145 transport_data["peer_session_hash"] = self._s5b.getSessionHash( |
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146 session["peer_jid"], client.jid, sid |
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147 ) # requester and target are inversed for peer candidates |
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148 transport_data["stream_d"] = self._s5b.registerHash(client, session_hash, None) |
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149 candidates = transport_data["candidates"] = yield self._s5b.getCandidates(client) |
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150 mode = "tcp" # XXX: we only manage tcp for now |
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151 transport_elt = self._buildCandidates( |
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152 session, candidates, sid, session_hash, client, mode |
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153 ) |
1560 | 154 |
155 defer.returnValue(transport_elt) | |
156 | |
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157 def _proxyActivatedCb(self, iq_result_elt, client, candidate, session, content_name): |
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158 """Called when activation confirmation has been received from proxy |
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159 |
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160 cf XEP-0260 § 2.4 |
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161 """ |
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162 # now that the proxy is activated, we have to inform other peer |
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163 iq_elt, transport_elt = self._j.buildAction( |
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164 client, self._j.A_TRANSPORT_INFO, session, content_name |
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165 ) |
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166 activated_elt = transport_elt.addElement("activated") |
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167 activated_elt["cid"] = candidate.id |
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168 iq_elt.send() |
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169 |
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170 def _proxyActivatedEb(self, stanza_error, client, candidate, session, content_name): |
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171 """Called when activation error has been received from proxy |
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172 |
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173 cf XEP-0260 § 2.4 |
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174 """ |
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175 # TODO: fallback to IBB |
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176 # now that the proxy is activated, we have to inform other peer |
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177 iq_elt, transport_elt = self._j.buildAction( |
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178 client, self._j.A_TRANSPORT_INFO, session, content_name |
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179 ) |
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180 transport_elt.addElement("proxy-error") |
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181 iq_elt.send() |
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182 log.warning( |
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183 u"Can't activate proxy, we need to fallback to IBB: {reason}".format( |
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184 reason=stanza_error.value.condition |
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185 ) |
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186 ) |
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187 self.doFallback(session, content_name, client) |
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188 |
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189 def _foundPeerCandidate( |
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190 self, candidate, session, transport_data, content_name, client |
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191 ): |
1560 | 192 """Called when the best candidate from other peer is found |
193 | |
194 @param candidate(XEP_0065.Candidate, None): selected candidate, | |
195 or None if no candidate is accessible | |
196 @param session(dict): session data | |
197 @param transport_data(dict): transport data | |
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198 @param content_name(unicode): name of the current content |
1560 | 199 @param client(unicode): %(doc_client)s |
200 """ | |
201 | |
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202 transport_data["best_candidate"] = candidate |
1560 | 203 # we need to disconnect all non selected candidates before removing them |
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204 for c in transport_data["peer_candidates"]: |
1560 | 205 if c is None or c is candidate: |
206 continue | |
207 c.discard() | |
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208 del transport_data["peer_candidates"] |
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209 iq_elt, transport_elt = self._j.buildAction( |
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210 client, self._j.A_TRANSPORT_INFO, session, content_name |
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211 ) |
1560 | 212 if candidate is None: |
213 log.warning(u"Can't connect to any peer candidate") | |
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214 candidate_elt = transport_elt.addElement("candidate-error") |
1560 | 215 else: |
216 log.info(u"Found best peer candidate: {}".format(unicode(candidate))) | |
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217 candidate_elt = transport_elt.addElement("candidate-used") |
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218 candidate_elt["cid"] = candidate.id |
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219 iq_elt.send() # TODO: check result stanza |
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220 self._checkCandidates(session, content_name, transport_data, client) |
1560 | 221 |
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222 def _checkCandidates(self, session, content_name, transport_data, client): |
1560 | 223 """Called when a candidate has been choosed |
224 | |
225 if we have both candidates, we select one, or fallback to an other transport | |
226 @param session(dict): session data | |
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227 @param content_name(unicode): name of the current content |
1560 | 228 @param transport_data(dict): transport data |
229 @param client(unicode): %(doc_client)s | |
230 """ | |
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231 content_data = session["contents"][content_name] |
1560 | 232 try: |
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233 best_candidate = transport_data["best_candidate"] |
1560 | 234 except KeyError: |
235 # we have not our best candidate yet | |
236 return | |
237 try: | |
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238 peer_best_candidate = transport_data["peer_best_candidate"] |
1560 | 239 except KeyError: |
240 # we have not peer best candidate yet | |
241 return | |
242 | |
243 # at this point we have both candidates, it's time to choose one | |
244 if best_candidate is None or peer_best_candidate is None: | |
245 choosed_candidate = best_candidate or peer_best_candidate | |
246 else: | |
247 if best_candidate.priority == peer_best_candidate.priority: | |
248 # same priority, we choose initiator one according to XEP-0260 §2.4 #4 | |
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249 log.debug( |
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250 u"Candidates have same priority, we select the one choosed by initiator" |
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251 ) |
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252 if session["initiator"] == client.jid: |
1560 | 253 choosed_candidate = best_candidate |
254 else: | |
255 choosed_candidate = peer_best_candidate | |
256 else: | |
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257 choosed_candidate = max( |
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258 best_candidate, peer_best_candidate, key=lambda c: c.priority |
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259 ) |
1560 | 260 |
261 if choosed_candidate is None: | |
262 log.warning(u"Socks5 negociation failed, we need to fallback to IBB") | |
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263 self.doFallback(session, content_name, client) |
1560 | 264 else: |
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265 if choosed_candidate == peer_best_candidate: |
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266 # peer_best_candidate was choosed from the candidates we have sent |
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267 # so our_candidate is true if choosed_candidate is peer_best_candidate |
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268 our_candidate = True |
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269 # than also mean that best_candidate must be discarded ! |
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270 try: |
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271 best_candidate.discard() |
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272 except AttributeError: # but it can be None |
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273 pass |
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274 else: |
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275 our_candidate = False |
1560 | 276 |
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277 log.info( |
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278 u"Socks5 negociation successful, {who} candidate will be used: {candidate}".format( |
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279 who=u"our" if our_candidate else u"other peer", |
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280 candidate=choosed_candidate, |
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281 ) |
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282 ) |
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283 del transport_data["best_candidate"] |
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284 del transport_data["peer_best_candidate"] |
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285 |
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286 if choosed_candidate.type == self._s5b.TYPE_PROXY: |
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287 # the stream transfer need to wait for proxy activation |
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288 # (see XEP-0260 § 2.4) |
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289 if our_candidate: |
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290 d = self._s5b.connectCandidate( |
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291 client, choosed_candidate, transport_data["session_hash"] |
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292 ) |
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293 d.addCallback( |
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294 lambda dummy: choosed_candidate.activate( |
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295 transport_data["sid"], session["peer_jid"], client |
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296 ) |
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297 ) |
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298 args = [client, choosed_candidate, session, content_name] |
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299 d.addCallbacks( |
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300 self._proxyActivatedCb, self._proxyActivatedEb, args, None, args |
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301 ) |
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302 else: |
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303 # this Deferred will be called when we'll receive activation confirmation from other peer |
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304 d = transport_data["activation_d"] = defer.Deferred() |
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305 else: |
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306 d = defer.succeed(None) |
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307 |
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308 if content_data["senders"] == session["role"]: |
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309 # we can now start the stream transfer (or start it after proxy activation) |
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310 d.addCallback( |
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311 lambda dummy: choosed_candidate.startTransfer( |
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312 transport_data["session_hash"] |
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313 ) |
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314 ) |
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315 d.addErrback(self._startEb, session, content_name, client) |
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316 |
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317 def _startEb(self, fail, session, content_name, client): |
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318 """Called when it's not possible to start the transfer |
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319 |
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320 Will try to fallback to IBB |
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321 """ |
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322 try: |
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323 reason = unicode(fail.value) |
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324 except AttributeError: |
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325 reason = unicode(fail) |
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326 log.warning(u"Cant start transfert, we'll try fallback method: {}".format(reason)) |
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327 self.doFallback(session, content_name, client) |
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328 |
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329 def _candidateInfo( |
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330 self, candidate_elt, session, content_name, transport_data, client |
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331 ): |
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332 """Called when best candidate has been received from peer (or if none is working) |
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333 |
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334 @param candidate_elt(domish.Element): candidate-used or candidate-error element |
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335 (see XEP-0260 §2.3) |
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336 @param session(dict): session data |
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337 @param content_name(unicode): name of the current content |
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338 @param transport_data(dict): transport data |
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339 @param client(unicode): %(doc_client)s |
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340 """ |
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341 if candidate_elt.name == "candidate-error": |
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342 # candidate-error, no candidate worked |
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343 transport_data["peer_best_candidate"] = None |
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344 else: |
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345 # candidate-used, one candidate was choosed |
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346 try: |
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347 cid = candidate_elt.attributes["cid"] |
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348 except KeyError: |
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349 log.warning(u"No cid found in <candidate-used>") |
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350 raise exceptions.DataError |
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351 try: |
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352 candidate = ( |
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353 c for c in transport_data["candidates"] if c.id == cid |
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354 ).next() |
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355 except StopIteration: |
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356 log.warning(u"Given cid doesn't correspond to any known candidate !") |
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357 raise exceptions.DataError # TODO: send an error to other peer, and use better exception |
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358 except KeyError: |
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359 # a transport-info can also be intentionaly sent too early by other peer |
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360 # but there is little probability |
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361 log.error( |
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362 u'"candidates" key doesn\'t exists in transport_data, it should at this point' |
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363 ) |
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364 raise exceptions.InternalError |
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365 # at this point we have the candidate choosed by other peer |
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366 transport_data["peer_best_candidate"] = candidate |
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367 log.info(u"Other peer best candidate: {}".format(candidate)) |
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368 |
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369 del transport_data["candidates"] |
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370 self._checkCandidates(session, content_name, transport_data, client) |
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371 |
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372 def _proxyActivationInfo( |
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373 self, proxy_elt, session, content_name, transport_data, client |
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374 ): |
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375 """Called when proxy has been activated (or has sent an error) |
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376 |
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377 @param proxy_elt(domish.Element): <activated/> or <proxy-error/> element |
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378 (see XEP-0260 §2.4) |
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379 @param session(dict): session data |
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380 @param content_name(unicode): name of the current content |
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381 @param transport_data(dict): transport data |
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382 @param client(unicode): %(doc_client)s |
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383 """ |
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384 try: |
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385 activation_d = transport_data.pop("activation_d") |
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386 except KeyError: |
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387 log.warning(u"Received unexpected transport-info for proxy activation") |
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388 |
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389 if proxy_elt.name == "activated": |
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390 activation_d.callback(None) |
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391 else: |
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392 activation_d.errback(ProxyError()) |
1560 | 393 |
394 @defer.inlineCallbacks | |
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395 def jingleHandler(self, client, action, session, content_name, transport_elt): |
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396 content_data = session["contents"][content_name] |
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397 transport_data = content_data["transport_data"] |
1560 | 398 |
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399 if action in (self._j.A_ACCEPTED_ACK, self._j.A_PREPARE_RESPONDER): |
1560 | 400 pass |
401 | |
402 elif action == self._j.A_SESSION_ACCEPT: | |
403 # initiator side, we select a candidate in the ones sent by responder | |
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404 assert "peer_candidates" not in transport_data |
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405 transport_data["peer_candidates"] = self._parseCandidates(transport_elt) |
1560 | 406 |
407 elif action == self._j.A_START: | |
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408 session_hash = transport_data["session_hash"] |
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409 peer_candidates = transport_data["peer_candidates"] |
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410 stream_object = content_data["stream_object"] |
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411 self._s5b.associateStreamObject(client, session_hash, stream_object) |
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412 stream_d = transport_data.pop("stream_d") |
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413 stream_d.chainDeferred(content_data["finished_d"]) |
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414 peer_session_hash = transport_data["peer_session_hash"] |
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415 d = self._s5b.getBestCandidate( |
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416 client, peer_candidates, session_hash, peer_session_hash |
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417 ) |
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418 d.addCallback( |
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419 self._foundPeerCandidate, session, transport_data, content_name, client |
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420 ) |
1560 | 421 |
422 elif action == self._j.A_SESSION_INITIATE: | |
423 # responder side, we select a candidate in the ones sent by initiator | |
424 # and we give our candidates | |
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425 assert "peer_candidates" not in transport_data |
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426 sid = transport_data["sid"] = transport_elt["sid"] |
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427 session_hash = transport_data["session_hash"] = self._s5b.getSessionHash( |
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428 client.jid, session["peer_jid"], sid |
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429 ) |
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430 peer_session_hash = transport_data[ |
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431 "peer_session_hash" |
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432 ] = self._s5b.getSessionHash( |
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433 session["peer_jid"], client.jid, sid |
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434 ) # requester and target are inversed for peer candidates |
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435 peer_candidates = transport_data["peer_candidates"] = self._parseCandidates( |
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436 transport_elt |
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437 ) |
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438 stream_object = content_data["stream_object"] |
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439 stream_d = self._s5b.registerHash(client, session_hash, stream_object) |
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440 stream_d.chainDeferred(content_data["finished_d"]) |
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441 d = self._s5b.getBestCandidate( |
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442 client, peer_candidates, session_hash, peer_session_hash |
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443 ) |
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444 d.addCallback( |
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445 self._foundPeerCandidate, session, transport_data, content_name, client |
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446 ) |
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447 candidates = yield self._s5b.getCandidates(client) |
1560 | 448 # we remove duplicate candidates |
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449 candidates = [ |
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450 candidate for candidate in candidates if candidate not in peer_candidates |
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451 ] |
1560 | 452 |
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453 transport_data["candidates"] = candidates |
1560 | 454 # we can now build a new <transport> element with our candidates |
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455 transport_elt = self._buildCandidates( |
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456 session, candidates, sid, session_hash, client |
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457 ) |
1560 | 458 |
459 elif action == self._j.A_TRANSPORT_INFO: | |
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460 # transport-info can be about candidate or proxy activation |
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461 candidate_elt = None |
1560 | 462 |
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463 for method, names in ( |
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464 (self._candidateInfo, ("candidate-used", "candidate-error")), |
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465 (self._proxyActivationInfo, ("activated", "proxy-error")), |
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466 ): |
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467 for name in names: |
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468 try: |
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469 candidate_elt = transport_elt.elements(NS_JINGLE_S5B, name).next() |
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470 except StopIteration: |
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471 continue |
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472 else: |
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473 method( |
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474 candidate_elt, session, content_name, transport_data, client |
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475 ) |
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476 break |
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477 |
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478 if candidate_elt is None: |
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479 log.warning( |
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480 u"Unexpected transport element: {}".format(transport_elt.toXml()) |
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481 ) |
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482 elif action == self._j.A_DESTROY: |
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483 # the transport is replaced (fallback ?), We need mainly to kill XEP-0065 session. |
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484 # note that sid argument is not necessary for sessions created by this plugin |
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485 self._s5b.killSession(None, transport_data["session_hash"], None, client) |
1560 | 486 else: |
487 log.warning(u"FIXME: unmanaged action {}".format(action)) | |
488 | |
489 defer.returnValue(transport_elt) | |
490 | |
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491 def jingleTerminate(self, client, action, session, content_name, reason_elt): |
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492 if reason_elt.decline: |
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493 log.debug(u"Session declined, deleting S5B session") |
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494 # we just need to clean the S5B session if it is declined |
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495 content_data = session["contents"][content_name] |
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496 transport_data = content_data["transport_data"] |
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497 self._s5b.killSession(None, transport_data["session_hash"], None, client) |
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498 |
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499 def _doFallback(self, feature_checked, session, content_name, client): |
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500 """Do the fallback, method called once feature is checked |
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501 |
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502 @param feature_checked(bool): True if other peer can do IBB |
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503 """ |
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504 if not feature_checked: |
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505 log.warning( |
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506 u"Other peer can't manage jingle IBB, be have to terminate the session" |
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507 ) |
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508 self._j.terminate(client, self._j.REASON_CONNECTIVITY_ERROR, session) |
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509 else: |
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510 self._j.transportReplace( |
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511 client, self._jingle_ibb.NAMESPACE, session, content_name |
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512 ) |
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513 |
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514 def doFallback(self, session, content_name, client): |
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515 """Fallback to IBB transport, used in last resort |
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516 |
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517 @param session(dict): session data |
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518 @param content_name(unicode): name of the current content |
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519 @param client(unicode): %(doc_client)s |
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520 """ |
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521 if session["role"] != self._j.ROLE_INITIATOR: |
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522 # only initiator must do the fallback, see XEP-0260 §3 |
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523 return |
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524 if self._jingle_ibb is None: |
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525 log.warning( |
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526 u"Jingle IBB (XEP-0261) plugin is not available, we have to close the session" |
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527 ) |
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528 self._j.terminate(client, self._j.REASON_CONNECTIVITY_ERROR, session) |
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529 else: |
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530 d = self.host.hasFeature( |
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531 client, self._jingle_ibb.NAMESPACE, session["peer_jid"] |
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532 ) |
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533 d.addCallback(self._doFallback, session, content_name, client) |
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534 return d |
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535 |
1560 | 536 |
537 class XEP_0260_handler(XMPPHandler): | |
538 implements(iwokkel.IDisco) | |
539 | |
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540 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
1560 | 541 return [disco.DiscoFeature(NS_JINGLE_S5B)] |
542 | |
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543 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
1560 | 544 return [] |