Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0260.py @ 1622:5b24d6bf5d15
core, bridge: actionsGet:
- added a new mechanism to keep actions until they are answered (or timeout-ed)
- keep_id must be explicitly used on actionNew
- actionsGet is used to retrive these actions
- the mechanism is used in deferXMLUI
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 17 Nov 2015 21:28:58 +0100 |
| parents | c668081eba1c |
| children | 25906c0dbc63 |
| rev | line source |
|---|---|
| 1560 | 1 #!/usr/bin/python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 # SAT plugin for Jingle (XEP-0260) | |
| 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org) | |
| 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"], | |
| 45 "main": "XEP_0260", | |
| 46 "handler": "yes", | |
| 47 "description": _("""Implementation of Jingle SOCKS5 Bytestreams""") | |
| 48 } | |
| 49 | |
| 50 | |
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51 class ProxyError(Exception): |
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52 pass |
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53 |
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54 |
| 1560 | 55 class XEP_0260(object): |
| 56 # TODO: udp handling | |
| 57 | |
| 58 def __init__(self, host): | |
| 59 log.info(_("plugin Jingle SOCKS5 Bytestreams")) | |
| 60 self.host = host | |
| 61 self._j = host.plugins["XEP-0166"] # shortcut to access jingle | |
| 62 self._s5b = host.plugins["XEP-0065"] # and socks5 bytestream | |
| 63 self._j.registerTransport(NS_JINGLE_S5B, self._j.TRANSPORT_STREAMING, self, 100) | |
| 64 | |
| 65 def getHandler(self, profile): | |
| 66 return XEP_0260_handler() | |
| 67 | |
| 68 def _parseCandidates(self, transport_elt): | |
| 69 """Parse <candidate> elements | |
| 70 | |
| 71 @param transport_elt(domish.Element): parent <transport> element | |
| 72 @return (list[plugin_xep_0065.Candidate): list of parsed candidates | |
| 73 """ | |
| 74 candidates = [] | |
| 75 for candidate_elt in transport_elt.elements(NS_JINGLE_S5B, 'candidate'): | |
| 76 try: | |
| 77 cid = candidate_elt['cid'] | |
| 78 host = candidate_elt['host'] | |
| 79 jid_= jid.JID(candidate_elt['jid']) | |
| 80 port = int(candidate_elt.getAttribute('port', 1080)) | |
| 81 priority = int(candidate_elt['priority']) | |
| 82 type_ = candidate_elt.getAttribute('type', self._s5b.TYPE_DIRECT) | |
| 83 except (KeyError, ValueError): | |
| 84 raise exceptions.DataError() | |
| 85 candidate = self._s5b.Candidate(host, port, type_, priority, jid_, cid) | |
| 86 candidates.append(candidate) | |
| 87 # self._s5b.registerCandidate(candidate) | |
| 88 return candidates | |
| 89 | |
| 90 def _buildCandidates(self, session, candidates, sid, session_hash, client, mode=None): | |
| 91 """Build <transport> element with candidates | |
| 92 | |
| 93 @param session(dict): jingle session data | |
| 94 @param candidates(iterator[plugin_xep_0065.Candidate]): iterator of candidates to add | |
| 95 @param sid(unicode): transport stream id | |
| 96 @param client: %(doc_client)s | |
| 97 @param mode(str, None): 'tcp' or 'udp', or None to have no attribute | |
| 98 @return (domish.Element): parent <transport> element where <candidate> elements must be added | |
| 99 """ | |
| 100 proxy = next((candidate for candidate in candidates if candidate.type == self._s5b.TYPE_PROXY), None) | |
| 101 transport_elt = domish.Element((NS_JINGLE_S5B, "transport")) | |
| 102 transport_elt['sid'] = sid | |
| 103 if proxy is not None: | |
| 104 transport_elt['dstaddr'] = session_hash | |
| 105 if mode is not None: | |
| 106 transport_elt['mode'] = 'tcp' # XXX: we only manage tcp for now | |
| 107 | |
| 108 for candidate in candidates: | |
| 109 log.debug(u"Adding candidate: {}".format(candidate)) | |
| 110 candidate_elt = transport_elt.addElement('candidate', NS_JINGLE_S5B) | |
| 111 if candidate.id is None: | |
| 112 candidate.id = unicode(uuid.uuid4()) | |
| 113 candidate_elt['cid'] = candidate.id | |
| 114 candidate_elt['host'] = candidate.host | |
| 115 candidate_elt['jid'] = candidate.jid.full() | |
| 116 candidate_elt['port'] = unicode(candidate.port) | |
| 117 candidate_elt['priority'] = unicode(candidate.priority) | |
| 118 candidate_elt['type'] = candidate.type | |
| 119 return transport_elt | |
| 120 | |
| 121 @defer.inlineCallbacks | |
| 122 def jingleSessionInit(self, session, content_name, profile): | |
| 123 client = self.host.getClient(profile) | |
| 124 content_data = session['contents'][content_name] | |
| 125 transport_data = content_data['transport_data'] | |
| 126 sid = transport_data['sid'] = unicode(uuid.uuid4()) | |
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127 session_hash = transport_data['session_hash'] = self._s5b.getSessionHash(client.jid, session['peer_jid'], sid) |
| 1560 | 128 candidates = transport_data['candidates'] = yield self._s5b.getCandidates(profile) |
| 129 mode = 'tcp' # XXX: we only manage tcp for now | |
| 130 transport_elt = self._buildCandidates(session, candidates, sid, session_hash, client, mode) | |
| 131 | |
| 132 defer.returnValue(transport_elt) | |
| 133 | |
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134 def _proxyActivatedCb(self, iq_result_elt, candidate, session, content_name, profile): |
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135 """Called when activation confirmation has been received from proxy |
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136 |
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137 cf XEP-0260 § 2.4 |
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138 """ |
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139 # now that the proxy is activated, we have to inform other peer |
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140 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, profile) |
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141 activated_elt = transport_elt.addElement('activated') |
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142 activated_elt['cid'] = candidate.id |
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143 iq_elt.send |
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144 |
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145 def _proxyActivatedEb(self, stanza_error, candidate, session, content_name, profile): |
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146 """Called when activation error has been received from proxy |
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147 |
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148 cf XEP-0260 § 2.4 |
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149 """ |
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150 # TODO: fallback to IBB |
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151 # now that the proxy is activated, we have to inform other peer |
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152 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, profile) |
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153 transport_elt.addElement('proxy-error') |
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154 iq_elt.send |
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155 return stanza_error |
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156 |
| 1560 | 157 def _foundPeerCandidate(self, candidate, session, transport_data, content_name, client): |
| 158 """Called when the best candidate from other peer is found | |
| 159 | |
| 160 @param candidate(XEP_0065.Candidate, None): selected candidate, | |
| 161 or None if no candidate is accessible | |
| 162 @param session(dict): session data | |
| 163 @param transport_data(dict): transport data | |
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164 @param content_name(unicode): name of the current content |
| 1560 | 165 @param client(unicode): %(doc_client)s |
| 166 """ | |
| 167 | |
| 168 transport_data['best_candidate'] = candidate | |
| 169 # we need to disconnect all non selected candidates before removing them | |
| 170 for c in transport_data['peer_candidates']: | |
| 171 if c is None or c is candidate: | |
| 172 continue | |
| 173 c.discard() | |
| 174 del transport_data['peer_candidates'] | |
| 175 iq_elt, transport_elt = self._j.buildAction(self._j.A_TRANSPORT_INFO, session, content_name, client.profile) | |
| 176 if candidate is None: | |
| 177 log.warning(u"Can't connect to any peer candidate") | |
| 178 candidate_elt = transport_elt.addElement('candidate-error') | |
| 179 else: | |
| 180 log.info(u"Found best peer candidate: {}".format(unicode(candidate))) | |
| 181 candidate_elt = transport_elt.addElement('candidate-used') | |
| 182 candidate_elt['cid'] = candidate.id | |
| 183 iq_elt.send() # TODO: check result stanza | |
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184 self._checkCandidates(session, content_name, transport_data, client) |
| 1560 | 185 |
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186 def _checkCandidates(self, session, content_name, transport_data, client): |
| 1560 | 187 """Called when a candidate has been choosed |
| 188 | |
| 189 if we have both candidates, we select one, or fallback to an other transport | |
| 190 @param session(dict): session data | |
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191 @param content_name(unicode): name of the current content |
| 1560 | 192 @param transport_data(dict): transport data |
| 193 @param client(unicode): %(doc_client)s | |
| 194 """ | |
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195 content_data = session['contents'][content_name] |
| 1560 | 196 try: |
| 197 best_candidate = transport_data['best_candidate'] | |
| 198 except KeyError: | |
| 199 # we have not our best candidate yet | |
| 200 return | |
| 201 try: | |
| 202 peer_best_candidate = transport_data['peer_best_candidate'] | |
| 203 except KeyError: | |
| 204 # we have not peer best candidate yet | |
| 205 return | |
| 206 | |
| 207 # at this point we have both candidates, it's time to choose one | |
| 208 if best_candidate is None or peer_best_candidate is None: | |
| 209 choosed_candidate = best_candidate or peer_best_candidate | |
| 210 else: | |
| 211 if best_candidate.priority == peer_best_candidate.priority: | |
| 212 # same priority, we choose initiator one according to XEP-0260 §2.4 #4 | |
| 213 log.debug(u"Candidates have same priority, we choose the initiator one") | |
| 214 if session['initiator'] == client.jid: | |
| 215 choosed_candidate = best_candidate | |
| 216 else: | |
| 217 choosed_candidate = peer_best_candidate | |
| 218 else: | |
| 219 choosed_candidate = max(best_candidate, peer_best_candidate, key=lambda c:c.priority) | |
| 220 | |
| 221 if choosed_candidate is None: | |
| 222 log.warning(u"Socks5 negociation failed, we need to fallback to IBB") | |
| 223 else: | |
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224 if choosed_candidate == peer_best_candidate: |
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225 # peer_best_candidate was choosed from the candidates we have sent |
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226 # so our_candidate is true if choosed_candidate is peer_best_candidate |
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227 our_candidate = True |
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228 # than also mean that best_candidate must be discarded ! |
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229 try: |
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230 best_candidate.discard() |
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231 except AttributeError: # but it can be None |
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232 pass |
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233 else: |
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234 our_candidate = False |
| 1560 | 235 |
| 236 log.info(u"Socks5 negociation successful, {who} candidate will be used: {candidate}".format( | |
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237 who = u'our' if our_candidate else u'other peer', |
| 1560 | 238 candidate = choosed_candidate)) |
| 239 del transport_data['best_candidate'] | |
| 240 del transport_data['peer_best_candidate'] | |
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241 |
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242 if choosed_candidate.type == self._s5b.TYPE_PROXY: |
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243 # the file transfer need to wait for proxy activation |
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244 # (see XEP-0260 § 2.4) |
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245 if our_candidate: |
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246 d = self._s5b.connectCandidate(choosed_candidate, transport_data['session_hash'], profile=client.profile) |
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247 d.addCallback(lambda dummy: choosed_candidate.activate(transport_data['sid'], session['peer_jid'], client)) |
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248 args = [choosed_candidate, session, content_name, client.profile] |
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249 d.addCallbacks(self._proxyActivatedCb, self._proxyActivatedEb, args, None, args) |
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250 else: |
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251 # this Deferred will be called when we'll receive activation confirmation from other peer |
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252 d = transport_data['activation_d'] = defer.Deferred() |
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253 else: |
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254 d = defer.succeed(None) |
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255 |
| 1560 | 256 if content_data['senders'] == session['role']: |
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257 # we can now start the file transfer (or start it after proxy activation) |
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258 d.addCallback(lambda dummy: choosed_candidate.startTransfer(transport_data['session_hash'])) |
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259 |
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260 def _candidateInfo(self, candidate_elt, session, content_name, transport_data, client): |
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261 """Called when best candidate has been received from peer (or if none is working) |
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262 |
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263 @param candidate_elt(domish.Element): candidate-used or candidate-error element |
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264 (see XEP-0260 §2.3) |
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265 @param session(dict): session data |
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266 @param content_name(unicode): name of the current content |
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267 @param transport_data(dict): transport data |
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268 @param client(unicode): %(doc_client)s |
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269 """ |
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270 if candidate_elt.name == 'candidate-error': |
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271 # candidate-error, no candidate worked |
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272 transport_data['peer_best_candidate'] = None |
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273 else: |
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274 # candidate-used, one candidate was choosed |
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275 try: |
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276 cid = candidate_elt.attributes['cid'] |
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277 except KeyError: |
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278 log.warning(u"No cid found in <candidate-used>") |
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279 raise exceptions.DataError |
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280 try: |
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281 candidate = (c for c in transport_data['candidates'] if c.id == cid).next() |
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282 except StopIteration: |
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283 log.warning(u"Given cid doesn't correspond to any known candidate !") |
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284 raise exceptions.DataError # TODO: send an error to other peer, and use better exception |
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285 except KeyError: |
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286 # a transport-info can also be intentionaly sent too early by other peer |
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287 # but there is little probability |
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288 log.error(u'"candidates" key doesn\'t exists in transport_data, it should at this point') |
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289 raise exceptions.InternalError |
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290 # at this point we have the candidate choosed by other peer |
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291 transport_data['peer_best_candidate'] = candidate |
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292 log.info(u"Other peer best candidate: {}".format(candidate)) |
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293 |
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294 del transport_data['candidates'] |
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295 self._checkCandidates(session, content_name, transport_data, client) |
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296 |
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297 def _proxyActivationInfo(self, proxy_elt, session, content_name, transport_data, client): |
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298 """Called when proxy has been activated (or has sent an error) |
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299 |
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300 @param proxy_elt(domish.Element): <activated/> or <proxy-error/> element |
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301 (see XEP-0260 §2.4) |
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302 @param session(dict): session data |
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303 @param content_name(unicode): name of the current content |
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304 @param transport_data(dict): transport data |
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305 @param client(unicode): %(doc_client)s |
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306 """ |
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307 try: |
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308 activation_d = transport_data.pop('activation_d') |
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309 except KeyError: |
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310 log.warning(u"Received unexpected transport-info for proxy activation") |
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311 |
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312 if proxy_elt.name == 'activated': |
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313 activation_d.callback(None) |
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314 else: |
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315 activation_d.errback(ProxyError) |
| 1560 | 316 |
| 317 @defer.inlineCallbacks | |
| 318 def jingleHandler(self, action, session, content_name, transport_elt, profile): | |
| 319 client = self.host.getClient(profile) | |
| 320 content_data = session['contents'][content_name] | |
| 321 transport_data = content_data['transport_data'] | |
| 322 | |
| 323 if action in (self._j.A_ACCEPTED_ACK,): | |
| 324 pass | |
| 325 | |
| 326 elif action == self._j.A_SESSION_ACCEPT: | |
| 327 # initiator side, we select a candidate in the ones sent by responder | |
| 328 assert 'peer_candidates' not in transport_data | |
| 329 transport_data['peer_candidates'] = self._parseCandidates(transport_elt) | |
| 330 | |
| 331 # elif action == self._j.A_START: | |
| 332 elif action == self._j.A_START: | |
| 333 session_hash = transport_data['session_hash'] | |
| 334 peer_candidates = transport_data['peer_candidates'] | |
| 335 file_obj = content_data['file_obj'] | |
| 336 stream_d = self._s5b.registerHash(session_hash, file_obj, profile) | |
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337 stream_d.chainDeferred(content_data['finished_d']) |
| 1560 | 338 d = self._s5b.getBestCandidate(peer_candidates, session_hash, profile) |
| 339 d.addCallback(self._foundPeerCandidate, session, transport_data, content_name, client) | |
| 340 | |
| 341 elif action == self._j.A_SESSION_INITIATE: | |
| 342 # responder side, we select a candidate in the ones sent by initiator | |
| 343 # and we give our candidates | |
| 344 assert 'peer_candidates' not in transport_data | |
| 345 sid = transport_data['sid'] = transport_elt['sid'] | |
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346 session_hash = transport_data['session_hash'] = self._s5b.getSessionHash(session['peer_jid'], client.jid, sid) |
| 1560 | 347 peer_candidates = transport_data['peer_candidates'] = self._parseCandidates(transport_elt) |
| 348 file_obj = content_data['file_obj'] | |
| 349 stream_d = self._s5b.registerHash(session_hash, file_obj, profile) | |
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350 stream_d.chainDeferred(content_data['finished_d']) |
| 1560 | 351 d = self._s5b.getBestCandidate(peer_candidates, session_hash, profile) |
| 352 d.addCallback(self._foundPeerCandidate, session, transport_data, content_name, client) | |
| 353 candidates = yield self._s5b.getCandidates(profile) | |
| 354 # we remove duplicate candidates | |
| 355 candidates = [candidate for candidate in candidates if candidate not in peer_candidates] | |
| 356 | |
| 357 transport_data['candidates'] = candidates | |
| 358 # we can now build a new <transport> element with our candidates | |
| 359 transport_elt = self._buildCandidates(session, candidates, sid, session_hash, client) | |
| 360 | |
| 361 elif action == self._j.A_TRANSPORT_INFO: | |
|
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362 # transport-info can be about candidate or proxy activation |
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363 candidate_elt = None |
| 1560 | 364 |
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365 for method, names in ((self._candidateInfo, ('candidate-used', 'candidate-error')), |
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366 (self._proxyActivationInfo, ('activated', 'proxy-error'))): |
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367 for name in names: |
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368 try: |
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369 candidate_elt = transport_elt.elements(NS_JINGLE_S5B, name).next() |
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370 except StopIteration: |
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371 continue |
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372 else: |
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373 method(candidate_elt, session, content_name, transport_data, client) |
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374 break |
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375 |
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376 if candidate_elt is None: |
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377 log.warning(u"Unexpected transport element: {}".format(transport_elt.toXml())) |
| 1560 | 378 |
| 379 else: | |
| 380 log.warning(u"FIXME: unmanaged action {}".format(action)) | |
| 381 | |
| 382 defer.returnValue(transport_elt) | |
| 383 | |
| 384 | |
| 385 class XEP_0260_handler(XMPPHandler): | |
| 386 implements(iwokkel.IDisco) | |
| 387 | |
| 388 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): | |
| 389 return [disco.DiscoFeature(NS_JINGLE_S5B)] | |
| 390 | |
| 391 def getDiscoItems(self, requestor, target, nodeIdentifier=''): | |
| 392 return [] |