Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_xep_0260.py @ 4090:e9d800b105c1
cli (event): minor typo
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Thu, 08 Jun 2023 21:28:40 +0200 |
| parents | 4b842c1fb686 |
| children | b86912d3fd33 |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
| 1560 | 3 |
| 4 # SAT plugin for Jingle (XEP-0260) | |
| 3479 | 5 # Copyright (C) 2009-2021 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 | |
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20 from libervia.backend.core.i18n import _ |
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21 from libervia.backend.core.constants import Const as C |
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22 from libervia.backend.core.log import getLogger |
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23 |
| 1560 | 24 log = getLogger(__name__) |
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25 from libervia.backend.core import exceptions |
| 1560 | 26 from wokkel import disco, iwokkel |
| 3028 | 27 from zope.interface import implementer |
| 1560 | 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 |
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72 self._j.register_transport(NS_JINGLE_S5B, self._j.TRANSPORT_STREAMING, self, 100) |
| 1560 | 73 |
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74 def get_handler(self, client): |
| 1560 | 75 return XEP_0260_handler() |
| 76 | |
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77 def _parse_candidates(self, transport_elt): |
| 1560 | 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 | |
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99 def _build_candidates(self, session, candidates, sid, session_hash, client, mode=None): |
| 1560 | 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: | |
| 3028 | 125 log.debug("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: |
| 3028 | 128 candidate.id = str(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() |
| 3028 | 132 candidate_elt["port"] = str(candidate.port) |
| 133 candidate_elt["priority"] = str(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 jingle_session_init(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"] |
| 3028 | 141 sid = transport_data["sid"] = str(uuid.uuid4()) |
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142 session_hash = transport_data["session_hash"] = self._s5b.get_session_hash( |
| 3028 | 143 session["local_jid"], session["peer_jid"], sid |
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144 ) |
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145 transport_data["peer_session_hash"] = self._s5b.get_session_hash( |
| 3028 | 146 session["peer_jid"], session["local_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.register_hash(client, session_hash, None) |
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149 candidates = transport_data["candidates"] = yield self._s5b.get_candidates( |
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150 client, session["local_jid"]) |
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151 mode = "tcp" # XXX: we only manage tcp for now |
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152 transport_elt = self._build_candidates( |
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153 session, candidates, sid, session_hash, client, mode |
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154 ) |
| 1560 | 155 |
| 156 defer.returnValue(transport_elt) | |
| 157 | |
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158 def _proxy_activated_cb(self, iq_result_elt, client, candidate, session, content_name): |
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159 """Called when activation confirmation has been received from proxy |
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160 |
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161 cf XEP-0260 § 2.4 |
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162 """ |
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163 # now that the proxy is activated, we have to inform other peer |
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164 content_data = session["contents"][content_name] |
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165 iq_elt, transport_elt = self._j.build_action( |
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166 client, self._j.A_TRANSPORT_INFO, session, content_name |
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167 ) |
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168 transport_elt["sid"] = content_data["transport_data"]["sid"] |
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169 activated_elt = transport_elt.addElement("activated") |
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170 activated_elt["cid"] = candidate.id |
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171 iq_elt.send() |
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172 |
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173 def _proxy_activated_eb(self, stanza_error, client, candidate, session, content_name): |
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174 """Called when activation error has been received from proxy |
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175 |
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176 cf XEP-0260 § 2.4 |
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177 """ |
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178 # TODO: fallback to IBB |
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179 # now that the proxy is activated, we have to inform other peer |
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180 content_data = session["contents"][content_name] |
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181 iq_elt, transport_elt = self._j.build_action( |
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182 client, self._j.A_TRANSPORT_INFO, session, content_name |
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183 ) |
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184 transport_elt["sid"] = content_data["transport_data"]["sid"] |
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185 transport_elt.addElement("proxy-error") |
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186 iq_elt.send() |
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187 log.warning( |
| 3028 | 188 "Can't activate proxy, we need to fallback to IBB: {reason}".format( |
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189 reason=stanza_error.value.condition |
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190 ) |
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191 ) |
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192 self.do_fallback(session, content_name, client) |
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193 |
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194 def _found_peer_candidate( |
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195 self, candidate, session, transport_data, content_name, client |
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196 ): |
| 1560 | 197 """Called when the best candidate from other peer is found |
| 198 | |
| 199 @param candidate(XEP_0065.Candidate, None): selected candidate, | |
| 200 or None if no candidate is accessible | |
| 201 @param session(dict): session data | |
| 202 @param transport_data(dict): transport data | |
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203 @param content_name(unicode): name of the current content |
| 1560 | 204 @param client(unicode): %(doc_client)s |
| 205 """ | |
| 206 | |
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207 content_data = session["contents"][content_name] |
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208 transport_data["best_candidate"] = candidate |
| 1560 | 209 # we need to disconnect all non selected candidates before removing them |
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210 for c in transport_data["peer_candidates"]: |
| 1560 | 211 if c is None or c is candidate: |
| 212 continue | |
| 213 c.discard() | |
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214 del transport_data["peer_candidates"] |
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215 iq_elt, transport_elt = self._j.build_action( |
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216 client, self._j.A_TRANSPORT_INFO, session, content_name |
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217 ) |
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218 transport_elt["sid"] = content_data["transport_data"]["sid"] |
| 1560 | 219 if candidate is None: |
| 3028 | 220 log.warning("Can't connect to any peer candidate") |
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221 candidate_elt = transport_elt.addElement("candidate-error") |
| 1560 | 222 else: |
| 3028 | 223 log.info("Found best peer candidate: {}".format(str(candidate))) |
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224 candidate_elt = transport_elt.addElement("candidate-used") |
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225 candidate_elt["cid"] = candidate.id |
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226 iq_elt.send() # TODO: check result stanza |
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227 self._check_candidates(session, content_name, transport_data, client) |
| 1560 | 228 |
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229 def _check_candidates(self, session, content_name, transport_data, client): |
| 1560 | 230 """Called when a candidate has been choosed |
| 231 | |
| 232 if we have both candidates, we select one, or fallback to an other transport | |
| 233 @param session(dict): session data | |
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234 @param content_name(unicode): name of the current content |
| 1560 | 235 @param transport_data(dict): transport data |
| 236 @param client(unicode): %(doc_client)s | |
| 237 """ | |
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238 content_data = session["contents"][content_name] |
| 1560 | 239 try: |
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240 best_candidate = transport_data["best_candidate"] |
| 1560 | 241 except KeyError: |
| 242 # we have not our best candidate yet | |
| 243 return | |
| 244 try: | |
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245 peer_best_candidate = transport_data["peer_best_candidate"] |
| 1560 | 246 except KeyError: |
| 247 # we have not peer best candidate yet | |
| 248 return | |
| 249 | |
| 250 # at this point we have both candidates, it's time to choose one | |
| 251 if best_candidate is None or peer_best_candidate is None: | |
| 252 choosed_candidate = best_candidate or peer_best_candidate | |
| 253 else: | |
| 254 if best_candidate.priority == peer_best_candidate.priority: | |
| 255 # same priority, we choose initiator one according to XEP-0260 §2.4 #4 | |
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256 log.debug( |
| 3028 | 257 "Candidates have same priority, we select the one choosed by initiator" |
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258 ) |
| 3028 | 259 if session["initiator"] == session["local_jid"]: |
| 1560 | 260 choosed_candidate = best_candidate |
| 261 else: | |
| 262 choosed_candidate = peer_best_candidate | |
| 263 else: | |
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264 choosed_candidate = max( |
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265 best_candidate, peer_best_candidate, key=lambda c: c.priority |
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266 ) |
| 1560 | 267 |
| 268 if choosed_candidate is None: | |
| 3028 | 269 log.warning("Socks5 negociation failed, we need to fallback to IBB") |
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270 self.do_fallback(session, content_name, client) |
| 1560 | 271 else: |
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272 if choosed_candidate == peer_best_candidate: |
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273 # peer_best_candidate was choosed from the candidates we have sent |
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274 # so our_candidate is true if choosed_candidate is peer_best_candidate |
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275 our_candidate = True |
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276 # than also mean that best_candidate must be discarded ! |
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277 try: |
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278 best_candidate.discard() |
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279 except AttributeError: # but it can be None |
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280 pass |
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281 else: |
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282 our_candidate = False |
| 1560 | 283 |
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284 log.info( |
| 3028 | 285 "Socks5 negociation successful, {who} candidate will be used: {candidate}".format( |
| 286 who="our" if our_candidate else "other peer", | |
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287 candidate=choosed_candidate, |
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288 ) |
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289 ) |
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290 del transport_data["best_candidate"] |
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291 del transport_data["peer_best_candidate"] |
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292 |
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293 if choosed_candidate.type == self._s5b.TYPE_PROXY: |
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294 # the stream transfer need to wait for proxy activation |
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295 # (see XEP-0260 § 2.4) |
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296 if our_candidate: |
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297 d = self._s5b.connect_candidate( |
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298 client, choosed_candidate, transport_data["session_hash"] |
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299 ) |
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300 d.addCallback( |
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301 lambda __: choosed_candidate.activate( |
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302 transport_data["sid"], session["peer_jid"], client |
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303 ) |
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304 ) |
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305 args = [client, choosed_candidate, session, content_name] |
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306 d.addCallbacks( |
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307 self._proxy_activated_cb, self._proxy_activated_eb, args, None, args |
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308 ) |
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309 else: |
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310 # this Deferred will be called when we'll receive activation confirmation from other peer |
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311 d = transport_data["activation_d"] = defer.Deferred() |
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312 else: |
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313 d = defer.succeed(None) |
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314 |
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315 if content_data["senders"] == session["role"]: |
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316 # we can now start the stream transfer (or start it after proxy activation) |
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317 d.addCallback( |
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318 lambda __: choosed_candidate.start_transfer( |
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319 transport_data["session_hash"] |
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320 ) |
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321 ) |
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322 d.addErrback(self._start_eb, session, content_name, client) |
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323 |
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324 def _start_eb(self, fail, session, content_name, client): |
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325 """Called when it's not possible to start the transfer |
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326 |
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327 Will try to fallback to IBB |
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328 """ |
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329 try: |
| 3028 | 330 reason = str(fail.value) |
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331 except AttributeError: |
| 3028 | 332 reason = str(fail) |
| 333 log.warning("Cant start transfert, we'll try fallback method: {}".format(reason)) | |
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334 self.do_fallback(session, content_name, client) |
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335 |
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336 def _candidate_info( |
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337 self, candidate_elt, session, content_name, transport_data, client |
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338 ): |
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339 """Called when best candidate has been received from peer (or if none is working) |
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340 |
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341 @param candidate_elt(domish.Element): candidate-used or candidate-error element |
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342 (see XEP-0260 §2.3) |
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343 @param session(dict): session data |
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344 @param content_name(unicode): name of the current content |
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345 @param transport_data(dict): transport data |
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346 @param client(unicode): %(doc_client)s |
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347 """ |
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348 if candidate_elt.name == "candidate-error": |
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349 # candidate-error, no candidate worked |
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350 transport_data["peer_best_candidate"] = None |
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351 else: |
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352 # candidate-used, one candidate was choosed |
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353 try: |
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354 cid = candidate_elt.attributes["cid"] |
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355 except KeyError: |
| 3028 | 356 log.warning("No cid found in <candidate-used>") |
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357 raise exceptions.DataError |
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358 try: |
| 3028 | 359 candidate = next(( |
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360 c for c in transport_data["candidates"] if c.id == cid |
| 3028 | 361 )) |
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362 except StopIteration: |
| 3028 | 363 log.warning("Given cid doesn't correspond to any known candidate !") |
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364 raise exceptions.DataError # TODO: send an error to other peer, and use better exception |
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365 except KeyError: |
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366 # a transport-info can also be intentionaly sent too early by other peer |
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367 # but there is little probability |
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368 log.error( |
| 3028 | 369 '"candidates" key doesn\'t exists in transport_data, it should at this point' |
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370 ) |
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371 raise exceptions.InternalError |
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372 # at this point we have the candidate choosed by other peer |
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373 transport_data["peer_best_candidate"] = candidate |
| 3028 | 374 log.info("Other peer best candidate: {}".format(candidate)) |
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375 |
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376 del transport_data["candidates"] |
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377 self._check_candidates(session, content_name, transport_data, client) |
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378 |
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379 def _proxy_activation_info( |
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380 self, proxy_elt, session, content_name, transport_data, client |
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381 ): |
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382 """Called when proxy has been activated (or has sent an error) |
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383 |
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384 @param proxy_elt(domish.Element): <activated/> or <proxy-error/> element |
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385 (see XEP-0260 §2.4) |
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386 @param session(dict): session data |
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387 @param content_name(unicode): name of the current content |
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388 @param transport_data(dict): transport data |
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389 @param client(unicode): %(doc_client)s |
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390 """ |
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391 try: |
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392 activation_d = transport_data.pop("activation_d") |
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393 except KeyError: |
| 3028 | 394 log.warning("Received unexpected transport-info for proxy activation") |
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395 |
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396 if proxy_elt.name == "activated": |
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397 activation_d.callback(None) |
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398 else: |
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399 activation_d.errback(ProxyError()) |
| 1560 | 400 |
| 401 @defer.inlineCallbacks | |
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402 def jingle_handler(self, client, action, session, content_name, transport_elt): |
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403 content_data = session["contents"][content_name] |
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404 transport_data = content_data["transport_data"] |
| 1560 | 405 |
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406 if action in (self._j.A_ACCEPTED_ACK, self._j.A_PREPARE_RESPONDER): |
| 1560 | 407 pass |
| 408 | |
| 409 elif action == self._j.A_SESSION_ACCEPT: | |
| 410 # initiator side, we select a candidate in the ones sent by responder | |
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411 assert "peer_candidates" not in transport_data |
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412 transport_data["peer_candidates"] = self._parse_candidates(transport_elt) |
| 1560 | 413 |
| 414 elif action == self._j.A_START: | |
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415 session_hash = transport_data["session_hash"] |
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416 peer_candidates = transport_data["peer_candidates"] |
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417 stream_object = content_data["stream_object"] |
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418 self._s5b.associate_stream_object(client, session_hash, stream_object) |
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419 stream_d = transport_data.pop("stream_d") |
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420 stream_d.chainDeferred(content_data["finished_d"]) |
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421 peer_session_hash = transport_data["peer_session_hash"] |
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422 d = self._s5b.get_best_candidate( |
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423 client, peer_candidates, session_hash, peer_session_hash |
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424 ) |
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425 d.addCallback( |
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426 self._found_peer_candidate, session, transport_data, content_name, client |
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427 ) |
| 1560 | 428 |
| 429 elif action == self._j.A_SESSION_INITIATE: | |
| 430 # responder side, we select a candidate in the ones sent by initiator | |
| 431 # and we give our candidates | |
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432 assert "peer_candidates" not in transport_data |
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433 sid = transport_data["sid"] = transport_elt["sid"] |
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434 session_hash = transport_data["session_hash"] = self._s5b.get_session_hash( |
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435 session["local_jid"], session["peer_jid"], sid |
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436 ) |
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437 peer_session_hash = transport_data[ |
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438 "peer_session_hash" |
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439 ] = self._s5b.get_session_hash( |
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440 session["peer_jid"], session["local_jid"], sid |
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441 ) # requester and target are inversed for peer candidates |
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442 peer_candidates = transport_data["peer_candidates"] = self._parse_candidates( |
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443 transport_elt |
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444 ) |
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445 stream_object = content_data["stream_object"] |
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446 stream_d = self._s5b.register_hash(client, session_hash, stream_object) |
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447 stream_d.chainDeferred(content_data["finished_d"]) |
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448 d = self._s5b.get_best_candidate( |
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449 client, peer_candidates, session_hash, peer_session_hash |
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450 ) |
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451 d.addCallback( |
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452 self._found_peer_candidate, session, transport_data, content_name, client |
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453 ) |
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454 candidates = yield self._s5b.get_candidates(client, session["local_jid"]) |
| 1560 | 455 # we remove duplicate candidates |
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456 candidates = [ |
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457 candidate for candidate in candidates if candidate not in peer_candidates |
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458 ] |
| 1560 | 459 |
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460 transport_data["candidates"] = candidates |
| 1560 | 461 # we can now build a new <transport> element with our candidates |
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462 transport_elt = self._build_candidates( |
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463 session, candidates, sid, session_hash, client |
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464 ) |
| 1560 | 465 |
| 466 elif action == self._j.A_TRANSPORT_INFO: | |
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467 # transport-info can be about candidate or proxy activation |
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468 candidate_elt = None |
| 1560 | 469 |
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470 for method, names in ( |
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471 (self._candidate_info, ("candidate-used", "candidate-error")), |
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472 (self._proxy_activation_info, ("activated", "proxy-error")), |
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473 ): |
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474 for name in names: |
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475 try: |
| 3028 | 476 candidate_elt = next(transport_elt.elements(NS_JINGLE_S5B, name)) |
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477 except StopIteration: |
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478 continue |
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479 else: |
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480 method( |
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481 candidate_elt, session, content_name, transport_data, client |
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482 ) |
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483 break |
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484 |
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485 if candidate_elt is None: |
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486 log.warning( |
| 3028 | 487 "Unexpected transport element: {}".format(transport_elt.toXml()) |
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488 ) |
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489 elif action == self._j.A_DESTROY: |
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490 # the transport is replaced (fallback ?), We need mainly to kill XEP-0065 session. |
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491 # note that sid argument is not necessary for sessions created by this plugin |
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492 self._s5b.kill_session(None, transport_data["session_hash"], None, client) |
| 1560 | 493 else: |
| 3028 | 494 log.warning("FIXME: unmanaged action {}".format(action)) |
| 1560 | 495 |
| 496 defer.returnValue(transport_elt) | |
| 497 | |
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498 def jingle_terminate(self, client, action, session, content_name, reason_elt): |
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499 if reason_elt.decline: |
| 3028 | 500 log.debug("Session declined, deleting S5B session") |
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501 # we just need to clean the S5B session if it is declined |
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502 content_data = session["contents"][content_name] |
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503 transport_data = content_data["transport_data"] |
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504 self._s5b.kill_session(None, transport_data["session_hash"], None, client) |
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505 |
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506 def _do_fallback(self, feature_checked, session, content_name, client): |
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507 """Do the fallback, method called once feature is checked |
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508 |
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509 @param feature_checked(bool): True if other peer can do IBB |
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510 """ |
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511 if not feature_checked: |
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512 log.warning( |
| 3028 | 513 "Other peer can't manage jingle IBB, be have to terminate the session" |
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514 ) |
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515 self._j.terminate(client, self._j.REASON_CONNECTIVITY_ERROR, session) |
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516 else: |
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517 self._j.transport_replace( |
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518 client, self._jingle_ibb.NAMESPACE, session, content_name |
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519 ) |
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520 |
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521 def do_fallback(self, session, content_name, client): |
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522 """Fallback to IBB transport, used in last resort |
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523 |
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524 @param session(dict): session data |
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525 @param content_name(unicode): name of the current content |
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526 @param client(unicode): %(doc_client)s |
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527 """ |
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528 if session["role"] != self._j.ROLE_INITIATOR: |
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529 # only initiator must do the fallback, see XEP-0260 §3 |
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530 return |
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531 if self._jingle_ibb is None: |
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532 log.warning( |
| 3028 | 533 "Jingle IBB (XEP-0261) plugin is not available, we have to close the session" |
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534 ) |
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535 self._j.terminate(client, self._j.REASON_CONNECTIVITY_ERROR, session) |
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536 else: |
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537 d = self.host.hasFeature( |
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538 client, self._jingle_ibb.NAMESPACE, session["peer_jid"] |
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539 ) |
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540 d.addCallback(self._do_fallback, session, content_name, client) |
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541 return d |
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542 |
| 1560 | 543 |
| 3028 | 544 @implementer(iwokkel.IDisco) |
| 1560 | 545 class XEP_0260_handler(XMPPHandler): |
| 546 | |
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547 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
| 1560 | 548 return [disco.DiscoFeature(NS_JINGLE_S5B)] |
| 549 | |
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550 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
| 1560 | 551 return [] |