Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0260.py @ 1794:b0ed4863dbc7
bridge (D-Bus): fixed handling of profile in kwargs:
kwargs are not handled by python D-Bus (i.e. they are not sent through D-Bus). The "profile" and "profile_key" kwargs are often used through SàT with the bridge, this was working so far because they were used for core methods (which have a signature in DBus.py handling profile), or in Libervia browser who ignore profile argument.
But if the profile or profile_key was used as a keyword for plugin method outside of Libervia browser, they were ignored, this commit fix this by adding them to the args list.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Wed, 13 Jan 2016 18:44:32 +0100 |
| parents | d17772b0fe22 |
| children | 2daf7b4c6756 |
| rev | line source |
|---|---|
| 1560 | 1 #!/usr/bin/python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 # SAT plugin for Jingle (XEP-0260) | |
| 1766 | 5 # Copyright (C) 2009-2016 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 _ | |
| 21 from sat.core.log import getLogger | |
| 22 log = getLogger(__name__) | |
| 23 from sat.core import exceptions | |
| 24 from wokkel import disco, iwokkel | |
| 25 from zope.interface import implements | |
| 26 from twisted.words.xish import domish | |
| 27 from twisted.words.protocols.jabber import jid | |
| 28 from twisted.internet import defer | |
| 29 import uuid | |
| 30 | |
| 31 try: | |
| 32 from twisted.words.protocols.xmlstream import XMPPHandler | |
| 33 except ImportError: | |
| 34 from wokkel.subprotocols import XMPPHandler | |
| 35 | |
| 36 | |
| 37 NS_JINGLE_S5B = 'urn:xmpp:jingle:transports:s5b:1' | |
| 38 | |
| 39 PLUGIN_INFO = { | |
| 40 "name": "Jingle SOCKS5 Bytestreams", | |
| 41 "import_name": "XEP-0260", | |
| 42 "type": "XEP", | |
| 43 "protocols": ["XEP-0260"], | |
| 44 "dependencies": ["XEP-0166", "XEP-0065"], | |
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45 "recommendations": ["XEP-0261"], # needed for fallback |
| 1560 | 46 "main": "XEP_0260", |
| 47 "handler": "yes", | |
| 48 "description": _("""Implementation of Jingle SOCKS5 Bytestreams""") | |
| 49 } | |
| 50 | |
| 51 | |
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52 class ProxyError(Exception): |
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53 |
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54 def __str__(self): |
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55 return "an error happened while trying to use the proxy" |
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56 |
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57 |
| 1560 | 58 class XEP_0260(object): |
| 59 # TODO: udp handling | |
| 60 | |
| 61 def __init__(self, host): | |
| 62 log.info(_("plugin Jingle SOCKS5 Bytestreams")) | |
| 63 self.host = host | |
| 64 self._j = host.plugins["XEP-0166"] # shortcut to access jingle | |
| 65 self._s5b = host.plugins["XEP-0065"] # and socks5 bytestream | |
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66 try: |
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67 self._jingle_ibb = host.plugins["XEP-0261"] |
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68 except KeyError: |
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69 self._jingle_ibb = None |
| 1560 | 70 self._j.registerTransport(NS_JINGLE_S5B, self._j.TRANSPORT_STREAMING, self, 100) |
| 71 | |
| 72 def getHandler(self, profile): | |
| 73 return XEP_0260_handler() | |
| 74 | |
| 75 def _parseCandidates(self, transport_elt): | |
| 76 """Parse <candidate> elements | |
| 77 | |
| 78 @param transport_elt(domish.Element): parent <transport> element | |
| 79 @return (list[plugin_xep_0065.Candidate): list of parsed candidates | |
| 80 """ | |
| 81 candidates = [] | |
| 82 for candidate_elt in transport_elt.elements(NS_JINGLE_S5B, 'candidate'): | |
| 83 try: | |
| 84 cid = candidate_elt['cid'] | |
| 85 host = candidate_elt['host'] | |
| 86 jid_= jid.JID(candidate_elt['jid']) | |
| 87 port = int(candidate_elt.getAttribute('port', 1080)) | |
| 88 priority = int(candidate_elt['priority']) | |
| 89 type_ = candidate_elt.getAttribute('type', self._s5b.TYPE_DIRECT) | |
| 90 except (KeyError, ValueError): | |
| 91 raise exceptions.DataError() | |
| 92 candidate = self._s5b.Candidate(host, port, type_, priority, jid_, cid) | |
| 93 candidates.append(candidate) | |
| 94 # self._s5b.registerCandidate(candidate) | |
| 95 return candidates | |
| 96 | |
| 97 def _buildCandidates(self, session, candidates, sid, session_hash, client, mode=None): | |
| 98 """Build <transport> element with candidates | |
| 99 | |
| 100 @param session(dict): jingle session data | |
| 101 @param candidates(iterator[plugin_xep_0065.Candidate]): iterator of candidates to add | |
| 102 @param sid(unicode): transport stream id | |
| 103 @param client: %(doc_client)s | |
| 104 @param mode(str, None): 'tcp' or 'udp', or None to have no attribute | |
| 105 @return (domish.Element): parent <transport> element where <candidate> elements must be added | |
| 106 """ | |
| 107 proxy = next((candidate for candidate in candidates if candidate.type == self._s5b.TYPE_PROXY), None) | |
| 108 transport_elt = domish.Element((NS_JINGLE_S5B, "transport")) | |
| 109 transport_elt['sid'] = sid | |
| 110 if proxy is not None: | |
| 111 transport_elt['dstaddr'] = session_hash | |
| 112 if mode is not None: | |
| 113 transport_elt['mode'] = 'tcp' # XXX: we only manage tcp for now | |
| 114 | |
| 115 for candidate in candidates: | |
| 116 log.debug(u"Adding candidate: {}".format(candidate)) | |
| 117 candidate_elt = transport_elt.addElement('candidate', NS_JINGLE_S5B) | |
| 118 if candidate.id is None: | |
| 119 candidate.id = unicode(uuid.uuid4()) | |
| 120 candidate_elt['cid'] = candidate.id | |
| 121 candidate_elt['host'] = candidate.host | |
| 122 candidate_elt['jid'] = candidate.jid.full() | |
| 123 candidate_elt['port'] = unicode(candidate.port) | |
| 124 candidate_elt['priority'] = unicode(candidate.priority) | |
| 125 candidate_elt['type'] = candidate.type | |
| 126 return transport_elt | |
| 127 | |
| 128 @defer.inlineCallbacks | |
| 129 def jingleSessionInit(self, session, content_name, profile): | |
| 130 client = self.host.getClient(profile) | |
| 131 content_data = session['contents'][content_name] | |
| 132 transport_data = content_data['transport_data'] | |
| 133 sid = transport_data['sid'] = unicode(uuid.uuid4()) | |
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134 session_hash = transport_data['session_hash'] = self._s5b.getSessionHash(client.jid, session['peer_jid'], sid) |
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135 transport_data['peer_session_hash'] = self._s5b.getSessionHash(session['peer_jid'], client.jid, sid) # requester and target are inversed for peer candidates |
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136 transport_data['stream_d'] = self._s5b.registerHash(session_hash, None, profile) |
| 1560 | 137 candidates = transport_data['candidates'] = yield self._s5b.getCandidates(profile) |
| 138 mode = 'tcp' # XXX: we only manage tcp for now | |
| 139 transport_elt = self._buildCandidates(session, candidates, sid, session_hash, client, mode) | |
| 140 | |
| 141 defer.returnValue(transport_elt) | |
| 142 | |
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143 def _proxyActivatedCb(self, iq_result_elt, candidate, session, content_name, profile): |
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144 """Called when activation confirmation has been received from proxy |
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145 |
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146 cf XEP-0260 § 2.4 |
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147 """ |
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148 # now that the proxy is activated, we have to inform other peer |
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149 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, profile) |
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150 activated_elt = transport_elt.addElement('activated') |
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151 activated_elt['cid'] = candidate.id |
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152 iq_elt.send() |
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153 |
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154 def _proxyActivatedEb(self, stanza_error, candidate, session, content_name, profile): |
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155 """Called when activation error has been received from proxy |
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156 |
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157 cf XEP-0260 § 2.4 |
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158 """ |
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159 # TODO: fallback to IBB |
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160 # now that the proxy is activated, we have to inform other peer |
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161 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, profile) |
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162 transport_elt.addElement('proxy-error') |
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163 iq_elt.send() |
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164 log.warning(u"Can't activate proxy, we need to fallback to IBB: {reason}" |
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165 .format(reason = stanza_error.value.condition)) |
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166 client = self.host.getClient(profile) |
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167 self.doFallback(session, content_name, client) |
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168 |
| 1560 | 169 def _foundPeerCandidate(self, candidate, session, transport_data, content_name, client): |
| 170 """Called when the best candidate from other peer is found | |
| 171 | |
| 172 @param candidate(XEP_0065.Candidate, None): selected candidate, | |
| 173 or None if no candidate is accessible | |
| 174 @param session(dict): session data | |
| 175 @param transport_data(dict): transport data | |
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176 @param content_name(unicode): name of the current content |
| 1560 | 177 @param client(unicode): %(doc_client)s |
| 178 """ | |
| 179 | |
| 180 transport_data['best_candidate'] = candidate | |
| 181 # we need to disconnect all non selected candidates before removing them | |
| 182 for c in transport_data['peer_candidates']: | |
| 183 if c is None or c is candidate: | |
| 184 continue | |
| 185 c.discard() | |
| 186 del transport_data['peer_candidates'] | |
| 187 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, client.profile) | |
| 188 if candidate is None: | |
| 189 log.warning(u"Can't connect to any peer candidate") | |
| 190 candidate_elt = transport_elt.addElement('candidate-error') | |
| 191 else: | |
| 192 log.info(u"Found best peer candidate: {}".format(unicode(candidate))) | |
| 193 candidate_elt = transport_elt.addElement('candidate-used') | |
| 194 candidate_elt['cid'] = candidate.id | |
| 195 iq_elt.send() # TODO: check result stanza | |
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196 self._checkCandidates(session, content_name, transport_data, client) |
| 1560 | 197 |
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198 def _checkCandidates(self, session, content_name, transport_data, client): |
| 1560 | 199 """Called when a candidate has been choosed |
| 200 | |
| 201 if we have both candidates, we select one, or fallback to an other transport | |
| 202 @param session(dict): session data | |
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203 @param content_name(unicode): name of the current content |
| 1560 | 204 @param transport_data(dict): transport data |
| 205 @param client(unicode): %(doc_client)s | |
| 206 """ | |
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207 content_data = session['contents'][content_name] |
| 1560 | 208 try: |
| 209 best_candidate = transport_data['best_candidate'] | |
| 210 except KeyError: | |
| 211 # we have not our best candidate yet | |
| 212 return | |
| 213 try: | |
| 214 peer_best_candidate = transport_data['peer_best_candidate'] | |
| 215 except KeyError: | |
| 216 # we have not peer best candidate yet | |
| 217 return | |
| 218 | |
| 219 # at this point we have both candidates, it's time to choose one | |
| 220 if best_candidate is None or peer_best_candidate is None: | |
| 221 choosed_candidate = best_candidate or peer_best_candidate | |
| 222 else: | |
| 223 if best_candidate.priority == peer_best_candidate.priority: | |
| 224 # same priority, we choose initiator one according to XEP-0260 §2.4 #4 | |
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225 log.debug(u"Candidates have same priority, we select the one choosed by initiator") |
| 1560 | 226 if session['initiator'] == client.jid: |
| 227 choosed_candidate = best_candidate | |
| 228 else: | |
| 229 choosed_candidate = peer_best_candidate | |
| 230 else: | |
| 231 choosed_candidate = max(best_candidate, peer_best_candidate, key=lambda c:c.priority) | |
| 232 | |
| 233 if choosed_candidate is None: | |
| 234 log.warning(u"Socks5 negociation failed, we need to fallback to IBB") | |
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235 self.doFallback(session, content_name, client) |
| 1560 | 236 else: |
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237 if choosed_candidate == peer_best_candidate: |
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238 # peer_best_candidate was choosed from the candidates we have sent |
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239 # so our_candidate is true if choosed_candidate is peer_best_candidate |
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240 our_candidate = True |
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241 # than also mean that best_candidate must be discarded ! |
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242 try: |
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243 best_candidate.discard() |
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244 except AttributeError: # but it can be None |
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245 pass |
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246 else: |
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247 our_candidate = False |
| 1560 | 248 |
| 249 log.info(u"Socks5 negociation successful, {who} candidate will be used: {candidate}".format( | |
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250 who = u'our' if our_candidate else u'other peer', |
| 1560 | 251 candidate = choosed_candidate)) |
| 252 del transport_data['best_candidate'] | |
| 253 del transport_data['peer_best_candidate'] | |
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254 |
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255 if choosed_candidate.type == self._s5b.TYPE_PROXY: |
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256 # the file transfer need to wait for proxy activation |
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257 # (see XEP-0260 § 2.4) |
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258 if our_candidate: |
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259 d = self._s5b.connectCandidate(choosed_candidate, transport_data['session_hash'], profile=client.profile) |
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260 d.addCallback(lambda dummy: choosed_candidate.activate(transport_data['sid'], session['peer_jid'], client)) |
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261 args = [choosed_candidate, session, content_name, client.profile] |
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262 d.addCallbacks(self._proxyActivatedCb, self._proxyActivatedEb, args, None, args) |
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263 else: |
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264 # this Deferred will be called when we'll receive activation confirmation from other peer |
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265 d = transport_data['activation_d'] = defer.Deferred() |
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266 else: |
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267 d = defer.succeed(None) |
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268 |
| 1560 | 269 if content_data['senders'] == session['role']: |
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270 # we can now start the file transfer (or start it after proxy activation) |
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271 d.addCallback(lambda dummy: choosed_candidate.startTransfer(transport_data['session_hash'])) |
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272 d.addErrback(self._startEb, session, content_name, client) |
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273 |
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274 def _startEb(self, fail, session, content_name, client): |
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275 """Called when it's not possible to start the transfer |
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276 |
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277 Will try to fallback to IBB |
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278 """ |
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279 try: |
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280 reason = unicode(fail.value) |
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281 except AttributeError: |
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282 reason = unicode(fail) |
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283 log.warning(u"Cant start transfert, we'll try fallback method: {}".format(reason)) |
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284 self.doFallback(session, content_name, client) |
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285 |
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286 def _candidateInfo(self, candidate_elt, session, content_name, transport_data, client): |
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287 """Called when best candidate has been received from peer (or if none is working) |
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288 |
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289 @param candidate_elt(domish.Element): candidate-used or candidate-error element |
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290 (see XEP-0260 §2.3) |
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291 @param session(dict): session data |
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292 @param content_name(unicode): name of the current content |
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293 @param transport_data(dict): transport data |
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294 @param client(unicode): %(doc_client)s |
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295 """ |
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296 if candidate_elt.name == 'candidate-error': |
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297 # candidate-error, no candidate worked |
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298 transport_data['peer_best_candidate'] = None |
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299 else: |
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300 # candidate-used, one candidate was choosed |
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301 try: |
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302 cid = candidate_elt.attributes['cid'] |
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303 except KeyError: |
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304 log.warning(u"No cid found in <candidate-used>") |
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305 raise exceptions.DataError |
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306 try: |
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307 candidate = (c for c in transport_data['candidates'] if c.id == cid).next() |
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308 except StopIteration: |
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309 log.warning(u"Given cid doesn't correspond to any known candidate !") |
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310 raise exceptions.DataError # TODO: send an error to other peer, and use better exception |
|
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311 except KeyError: |
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312 # a transport-info can also be intentionaly sent too early by other peer |
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313 # but there is little probability |
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314 log.error(u'"candidates" key doesn\'t exists in transport_data, it should at this point') |
|
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315 raise exceptions.InternalError |
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316 # at this point we have the candidate choosed by other peer |
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317 transport_data['peer_best_candidate'] = candidate |
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318 log.info(u"Other peer best candidate: {}".format(candidate)) |
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319 |
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320 del transport_data['candidates'] |
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321 self._checkCandidates(session, content_name, transport_data, client) |
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322 |
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323 def _proxyActivationInfo(self, proxy_elt, session, content_name, transport_data, client): |
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324 """Called when proxy has been activated (or has sent an error) |
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325 |
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326 @param proxy_elt(domish.Element): <activated/> or <proxy-error/> element |
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327 (see XEP-0260 §2.4) |
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328 @param session(dict): session data |
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329 @param content_name(unicode): name of the current content |
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330 @param transport_data(dict): transport data |
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331 @param client(unicode): %(doc_client)s |
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332 """ |
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333 try: |
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334 activation_d = transport_data.pop('activation_d') |
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335 except KeyError: |
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336 log.warning(u"Received unexpected transport-info for proxy activation") |
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337 |
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338 if proxy_elt.name == 'activated': |
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339 activation_d.callback(None) |
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340 else: |
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341 activation_d.errback(ProxyError()) |
| 1560 | 342 |
| 343 @defer.inlineCallbacks | |
| 344 def jingleHandler(self, action, session, content_name, transport_elt, profile): | |
| 345 client = self.host.getClient(profile) | |
| 346 content_data = session['contents'][content_name] | |
| 347 transport_data = content_data['transport_data'] | |
| 348 | |
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349 if action in (self._j.A_ACCEPTED_ACK, self._j.A_PREPARE_RESPONDER): |
| 1560 | 350 pass |
| 351 | |
| 352 elif action == self._j.A_SESSION_ACCEPT: | |
| 353 # initiator side, we select a candidate in the ones sent by responder | |
| 354 assert 'peer_candidates' not in transport_data | |
| 355 transport_data['peer_candidates'] = self._parseCandidates(transport_elt) | |
| 356 | |
| 357 elif action == self._j.A_START: | |
| 358 session_hash = transport_data['session_hash'] | |
| 359 peer_candidates = transport_data['peer_candidates'] | |
| 360 file_obj = content_data['file_obj'] | |
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361 self._s5b.associateFileObj(session_hash, file_obj, profile) |
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362 stream_d = transport_data.pop('stream_d') |
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363 stream_d.chainDeferred(content_data['finished_d']) |
|
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364 peer_session_hash = transport_data['peer_session_hash'] |
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365 d = self._s5b.getBestCandidate(peer_candidates, session_hash, peer_session_hash, profile) |
| 1560 | 366 d.addCallback(self._foundPeerCandidate, session, transport_data, content_name, client) |
| 367 | |
| 368 elif action == self._j.A_SESSION_INITIATE: | |
| 369 # responder side, we select a candidate in the ones sent by initiator | |
| 370 # and we give our candidates | |
| 371 assert 'peer_candidates' not in transport_data | |
| 372 sid = transport_data['sid'] = transport_elt['sid'] | |
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373 session_hash = transport_data['session_hash'] = self._s5b.getSessionHash(client.jid, session['peer_jid'], sid) |
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374 peer_session_hash = transport_data['peer_session_hash'] = self._s5b.getSessionHash(session['peer_jid'], client.jid, sid) # requester and target are inversed for peer candidates |
| 1560 | 375 peer_candidates = transport_data['peer_candidates'] = self._parseCandidates(transport_elt) |
| 376 file_obj = content_data['file_obj'] | |
| 377 stream_d = self._s5b.registerHash(session_hash, file_obj, profile) | |
|
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378 stream_d.chainDeferred(content_data['finished_d']) |
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379 d = self._s5b.getBestCandidate(peer_candidates, session_hash, peer_session_hash, profile) |
| 1560 | 380 d.addCallback(self._foundPeerCandidate, session, transport_data, content_name, client) |
| 381 candidates = yield self._s5b.getCandidates(profile) | |
| 382 # we remove duplicate candidates | |
| 383 candidates = [candidate for candidate in candidates if candidate not in peer_candidates] | |
| 384 | |
| 385 transport_data['candidates'] = candidates | |
| 386 # we can now build a new <transport> element with our candidates | |
| 387 transport_elt = self._buildCandidates(session, candidates, sid, session_hash, client) | |
| 388 | |
| 389 elif action == self._j.A_TRANSPORT_INFO: | |
|
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390 # transport-info can be about candidate or proxy activation |
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391 candidate_elt = None |
| 1560 | 392 |
|
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393 for method, names in ((self._candidateInfo, ('candidate-used', 'candidate-error')), |
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394 (self._proxyActivationInfo, ('activated', 'proxy-error'))): |
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395 for name in names: |
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396 try: |
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397 candidate_elt = transport_elt.elements(NS_JINGLE_S5B, name).next() |
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398 except StopIteration: |
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399 continue |
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400 else: |
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401 method(candidate_elt, session, content_name, transport_data, client) |
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402 break |
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403 |
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404 if candidate_elt is None: |
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405 log.warning(u"Unexpected transport element: {}".format(transport_elt.toXml())) |
|
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406 elif action == self._j.A_DESTROY: |
|
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407 # the transport is replaced (fallback ?), We need mainly to kill XEP-0065 session. |
|
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408 # note that sid argument is not necessary for sessions created by this plugin |
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409 self._s5b.killSession(None, transport_data['session_hash'], None, client) |
| 1560 | 410 else: |
| 411 log.warning(u"FIXME: unmanaged action {}".format(action)) | |
| 412 | |
| 413 defer.returnValue(transport_elt) | |
| 414 | |
|
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415 def jingleTerminate(self, action, session, content_name, reason_elt, profile): |
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416 if reason_elt.decline: |
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417 log.debug(u"Session declined, deleting S5B session") |
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418 # we just need to clean the S5B session if it is declined |
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419 client = self.host.getClient(profile) |
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420 content_data = session['contents'][content_name] |
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421 transport_data = content_data['transport_data'] |
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422 self._s5b.killSession(None, transport_data['session_hash'], None, client) |
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423 |
|
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424 def _doFallback(self, feature_checked, session, content_name, client): |
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425 """Do the fallback, method called once feature is checked |
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426 |
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427 @param feature_checked(bool): True if other peer can do IBB |
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428 """ |
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429 if not feature_checked: |
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430 log.warning(u"Other peer can't manage jingle IBB, be have to terminate the session") |
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431 self._j.terminate(self._j.REASON_CONNECTIVITY_ERROR, session, client.profile) |
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432 else: |
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433 self._j.transportReplace(self._jingle_ibb.NAMESPACE, session, content_name, client.profile) |
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434 |
|
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435 def doFallback(self, session, content_name, client): |
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436 """Fallback to IBB transport, used in last resort |
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437 |
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438 @param session(dict): session data |
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439 @param content_name(unicode): name of the current content |
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440 @param client(unicode): %(doc_client)s |
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441 """ |
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442 if session['role'] != self._j.ROLE_INITIATOR: |
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443 # only initiator must do the fallback, see XEP-0260 §3 |
|
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444 return |
|
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445 if self._jingle_ibb is None: |
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446 log.warning(u"Jingle IBB (XEP-0261) plugin is not available, we have to close the session") |
|
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447 self._j.terminate(self._j.REASON_CONNECTIVITY_ERROR, session, client.profile) |
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448 else: |
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449 d = self.host.hasFeature(self._jingle_ibb.NAMESPACE, session['peer_jid'], client.profile) |
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450 d.addCallback(self._doFallback, session, content_name, client) |
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451 return d |
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452 |
| 1560 | 453 |
| 454 class XEP_0260_handler(XMPPHandler): | |
| 455 implements(iwokkel.IDisco) | |
| 456 | |
| 457 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): | |
| 458 return [disco.DiscoFeature(NS_JINGLE_S5B)] | |
| 459 | |
| 460 def getDiscoItems(self, requestor, target, nodeIdentifier=''): | |
| 461 return [] |