xmpp_component.cpp 16.2 KB
Newer Older
1
#include <utils/make_unique.hpp>
louiz’'s avatar
louiz’ committed
2
#include <logger/logger.hpp>
3

4
#include <xmpp/xmpp_component.hpp>
5
#include <xmpp/jid.hpp>
6

7 8
#include <utils/sha1.hpp>

9 10
#include <iostream>

11
#include <stdio.h>
12

13 14 15 16
#define STREAM_NS        "http://etherx.jabber.org/streams"
#define COMPONENT_NS     "jabber:component:accept"
#define MUC_NS           "http://jabber.org/protocol/muc"
#define MUC_USER_NS      MUC_NS"#user"
17
#define MUC_ADMIN_NS     MUC_NS"#admin"
18 19 20
#define DISCO_NS         "http://jabber.org/protocol/disco"
#define DISCO_ITEMS_NS   DISCO_NS"#items"
#define DISCO_INFO_NS    DISCO_NS"#info"
21
#define XHTMLIM_NS       "http://jabber.org/protocol/xhtml-im"
22
#define STANZA_NS        "urn:ietf:params:xml:ns:xmpp-stanzas"
louiz’'s avatar
louiz’ committed
23
#define STREAMS_NS       "urn:ietf:params:xml:ns:xmpp-streams"
24

25 26 27
XmppComponent::XmppComponent(const std::string& hostname, const std::string& secret):
  served_hostname(hostname),
  secret(secret),
louiz’'s avatar
louiz’ committed
28 29
  authenticated(false),
  doc_open(false)
30 31 32 33 34 35 36
{
  this->parser.add_stream_open_callback(std::bind(&XmppComponent::on_remote_stream_open, this,
                                                  std::placeholders::_1));
  this->parser.add_stanza_callback(std::bind(&XmppComponent::on_stanza, this,
                                                  std::placeholders::_1));
  this->parser.add_stream_close_callback(std::bind(&XmppComponent::on_remote_stream_close, this,
                                                  std::placeholders::_1));
37
  this->stanza_handlers.emplace(COMPONENT_NS":handshake",
38
                                std::bind(&XmppComponent::handle_handshake, this,std::placeholders::_1));
39
  this->stanza_handlers.emplace(COMPONENT_NS":presence",
40
                                std::bind(&XmppComponent::handle_presence, this,std::placeholders::_1));
41
  this->stanza_handlers.emplace(COMPONENT_NS":message",
louiz’'s avatar
louiz’ committed
42
                                std::bind(&XmppComponent::handle_message, this,std::placeholders::_1));
43 44
  this->stanza_handlers.emplace(COMPONENT_NS":iq",
                                std::bind(&XmppComponent::handle_iq, this,std::placeholders::_1));
louiz’'s avatar
louiz’ committed
45 46
  this->stanza_handlers.emplace(STREAM_NS":error",
                                std::bind(&XmppComponent::handle_error, this,std::placeholders::_1));
47 48 49 50 51 52
}

XmppComponent::~XmppComponent()
{
}

53
void XmppComponent::start()
54
{
55
  this->connect("127.0.0.1", "5347");
56 57
}

louiz’'s avatar
louiz’ committed
58 59 60 61 62
bool XmppComponent::is_document_open() const
{
  return this->doc_open;
}

63 64
void XmppComponent::send_stanza(const Stanza& stanza)
{
louiz’'s avatar
louiz’ committed
65 66 67
  std::string str = stanza.to_string();
  log_debug("XMPP SENDING: " << str);
  this->send_data(std::move(str));
68 69
}

70 71 72 73 74
void XmppComponent::on_connection_failed(const std::string& reason)
{
  log_error("Failed to connect to the XMPP server: " << reason);
}

75 76
void XmppComponent::on_connected()
{
louiz’'s avatar
louiz’ committed
77
  log_info("connected to XMPP server");
78
  XmlNode node("stream:stream", nullptr);
79 80
  node["xmlns"] = COMPONENT_NS;
  node["xmlns:stream"] = STREAM_NS;
81
  node["to"] = this->served_hostname;
82
  this->send_stanza(node);
louiz’'s avatar
louiz’ committed
83
  this->doc_open = true;
84 85 86 87
}

void XmppComponent::on_connection_close()
{
louiz’'s avatar
louiz’ committed
88
  log_info("XMPP server closed connection");
89 90 91 92
}

void XmppComponent::parse_in_buffer()
{
93
  this->parser.feed(this->in_buf.data(), this->in_buf.size(), false);
94 95 96
  this->in_buf.clear();
}

louiz’'s avatar
louiz’ committed
97 98 99 100 101 102 103 104
void XmppComponent::shutdown()
{
  for (auto it = this->bridges.begin(); it != this->bridges.end(); ++it)
  {
    it->second->shutdown();
  }
}

louiz’'s avatar
louiz’ committed
105 106
void XmppComponent::clean()
{
louiz’'s avatar
louiz’ committed
107 108
  auto it = this->bridges.begin();
  while (it != this->bridges.end())
louiz’'s avatar
louiz’ committed
109 110
  {
    it->second->clean();
111
    if (it->second->active_clients() == 0)
louiz’'s avatar
louiz’ committed
112 113 114
      it = this->bridges.erase(it);
    else
      ++it;
louiz’'s avatar
louiz’ committed
115 116 117
  }
}

118 119
void XmppComponent::on_remote_stream_open(const XmlNode& node)
{
louiz’'s avatar
louiz’ committed
120
  log_debug("XMPP DOCUMENT OPEN: " << node.to_string());
121 122 123 124 125 126
  try
    {
      this->stream_id = node["id"];
    }
  catch (const AttributeNotFound& e)
    {
louiz’'s avatar
louiz’ committed
127
      log_error("Error: no attribute 'id' found");
128 129 130 131 132 133
      this->send_stream_error("bad-format", "missing 'id' attribute");
      this->close_document();
      return ;
    }

  // Try to authenticate
134 135 136 137 138 139 140 141 142 143 144
  char digest[HASH_LENGTH * 2 + 1];
  sha1nfo sha1;
  sha1_init(&sha1);
  sha1_write(&sha1, this->stream_id.data(), this->stream_id.size());
  sha1_write(&sha1, this->secret.data(),  this->secret.size());
  const uint8_t* result = sha1_result(&sha1);
  for (int i=0; i < HASH_LENGTH; i++)
    sprintf(digest + (i*2), "%02x", result[i]);
  digest[HASH_LENGTH * 2] = '\0';

  Stanza handshake("handshake");
145 146 147 148 149 150 151
  handshake.set_inner(digest);
  handshake.close();
  this->send_stanza(handshake);
}

void XmppComponent::on_remote_stream_close(const XmlNode& node)
{
louiz’'s avatar
louiz’ committed
152
  log_debug("XMPP DOCUMENT CLOSE " << node.to_string());
153 154 155 156
}

void XmppComponent::on_stanza(const Stanza& stanza)
{
louiz’'s avatar
louiz’ committed
157
  log_debug("XMPP RECEIVING: " << stanza.to_string());
158
  std::function<void(const Stanza&)> handler;
159 160
  try
    {
161
      handler = this->stanza_handlers.at(stanza.get_name());
162 163 164
    }
  catch (const std::out_of_range& exception)
    {
louiz’'s avatar
louiz’ committed
165
      log_warning("No handler for stanza of type " << stanza.get_name());
166 167
      return;
    }
168
  handler(stanza);
169 170 171 172 173 174
}

void XmppComponent::send_stream_error(const std::string& name, const std::string& explanation)
{
  XmlNode node("stream:error", nullptr);
  XmlNode error(name, nullptr);
175
  error["xmlns"] = STREAM_NS;
176 177 178 179 180 181 182 183 184 185
  if (!explanation.empty())
    error.set_inner(explanation);
  error.close();
  node.add_child(std::move(error));
  node.close();
  this->send_stanza(node);
}

void XmppComponent::close_document()
{
louiz’'s avatar
louiz’ committed
186
  log_debug("XMPP SENDING: </stream:stream>");
187
  this->send_data("</stream:stream>");
louiz’'s avatar
louiz’ committed
188
  this->doc_open = false;
189 190 191 192
}

void XmppComponent::handle_handshake(const Stanza& stanza)
{
193
  (void)stanza;
194
  this->authenticated = true;
louiz’'s avatar
louiz’ committed
195
  log_info("Authenticated with the XMPP server");
196
}
197 198 199 200 201 202

void XmppComponent::handle_presence(const Stanza& stanza)
{
  Bridge* bridge = this->get_user_bridge(stanza["from"]);
  Jid to(stanza["to"]);
  Iid iid(to.local);
louiz’'s avatar
louiz’ committed
203 204 205 206 207 208 209 210 211
  std::string type;
  try {
    type = stanza["type"];
  }
  catch (const AttributeNotFound&) {}

  if (!iid.chan.empty() && !iid.chan.empty())
    { // presence toward a MUC that corresponds to an irc channel
      if (type.empty())
louiz’'s avatar
louiz’ committed
212 213 214 215
        {
          const std::string own_nick = bridge->get_own_nick(iid);
          if (!own_nick.empty() && own_nick != to.resource)
            bridge->send_irc_nick_change(iid, to.resource);
216
          bridge->join_irc_channel(iid, to.resource);
louiz’'s avatar
louiz’ committed
217
        }
louiz’'s avatar
louiz’ committed
218 219
      else if (type == "unavailable")
        {
220
          XmlNode* status = stanza.get_child(COMPONENT_NS":status");
louiz’'s avatar
louiz’ committed
221 222 223
          bridge->leave_irc_channel(std::move(iid), status ? std::move(status->get_inner()) : "");
        }
    }
224 225
}

louiz’'s avatar
louiz’ committed
226 227 228 229 230
void XmppComponent::handle_message(const Stanza& stanza)
{
  Bridge* bridge = this->get_user_bridge(stanza["from"]);
  Jid to(stanza["to"]);
  Iid iid(to.local);
231
  XmlNode* body = stanza.get_child(COMPONENT_NS":body");
louiz’'s avatar
louiz’ committed
232 233 234 235 236
  if (stanza["type"] == "groupchat")
    {
      if (to.resource.empty())
        if (body && !body->get_inner().empty())
          bridge->send_channel_message(iid, body->get_inner());
237 238 239
      XmlNode* subject = stanza.get_child(COMPONENT_NS":subject");
      if (subject)
        bridge->set_channel_topic(iid, subject->get_inner());
louiz’'s avatar
louiz’ committed
240
    }
louiz’'s avatar
louiz’ committed
241 242 243 244 245
  else
    {
      if (body && !body->get_inner().empty())
        bridge->send_private_message(iid, body->get_inner());
    }
louiz’'s avatar
louiz’ committed
246 247
}

248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
void XmppComponent::handle_iq(const Stanza& stanza)
{
  Bridge* bridge = this->get_user_bridge(stanza["from"]);
  Jid to(stanza["to"]);
  std::string type;
  try {
    type = stanza["type"];
  }
  catch (const AttributeNotFound&)
    { return; }
  if (type == "set")
    {
      XmlNode* query;
      if ((query = stanza.get_child(MUC_ADMIN_NS":query")))
        {
          XmlNode* child;
          if ((child = query->get_child(MUC_ADMIN_NS":item")))
            {
              std::string nick;
              std::string role;
              try {
                nick = (*child)["nick"];
                role = (*child)["role"];
              }
              catch (const AttributeNotFound&)
                { return; }
              if (!nick.empty() && role == "none")
                {
                  std::string reason;
                  XmlNode* reason_el = child->get_child(MUC_ADMIN_NS":reason");
                  if (reason_el)
                    reason = reason_el->get_inner();
                  Iid iid(to.local);
                  bridge->send_irc_kick(iid, nick, reason);
                }
            }
        }
    }
}

louiz’'s avatar
louiz’ committed
288 289 290 291 292 293 294 295 296
void XmppComponent::handle_error(const Stanza& stanza)
{
  XmlNode* text = stanza.get_child(STREAMS_NS":text");
  std::string error_message("Unspecified error");
  if (text)
    error_message = text->get_inner();
  log_error("Stream error received from the XMPP server: " << error_message);
}

297 298 299 300 301 302 303 304 305 306 307 308 309
Bridge* XmppComponent::get_user_bridge(const std::string& user_jid)
{
  try
    {
      return this->bridges.at(user_jid).get();
    }
  catch (const std::out_of_range& exception)
    {
      this->bridges.emplace(user_jid, std::make_unique<Bridge>(user_jid, this, this->poller));
      return this->bridges.at(user_jid).get();
    }
}

310
void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, const std::string& to)
311 312 313 314 315
{
  XmlNode node("message");
  node["to"] = to;
  node["from"] = from + "@" + this->served_hostname;
  XmlNode body_node("body");
316
  body_node.set_inner(std::get<0>(body));
317 318 319 320 321 322
  body_node.close();
  node.add_child(std::move(body_node));
  node.close();
  this->send_stanza(node);
}

323 324 325
void XmppComponent::send_user_join(const std::string& from,
                                   const std::string& nick,
                                   const std::string& realjid,
326 327 328 329
                                   const std::string& affiliation,
                                   const std::string& role,
                                   const std::string& to,
                                   const bool self)
330 331 332 333 334 335
{
  XmlNode node("presence");
  node["to"] = to;
  node["from"] = from + "@" + this->served_hostname + "/" + nick;

  XmlNode x("x");
336
  x["xmlns"] = MUC_USER_NS;
337 338

  XmlNode item("item");
339 340 341 342
  if (!affiliation.empty())
    item["affiliation"] = affiliation;
  if (!role.empty())
    item["role"] = role;
343 344 345 346 347 348
  if (!realjid.empty())
    {
      const std::string preped_jid = jidprep(realjid);
      if (!preped_jid.empty())
        item["jid"] = preped_jid;
    }
349
  item.close();
350
  x.add_child(std::move(item));
351

352 353 354 355 356 357 358
  if (self)
    {
      XmlNode status("status");
      status["code"] = "110";
      status.close();
      x.add_child(std::move(status));
    }
359 360 361 362 363 364
  x.close();
  node.add_child(std::move(x));
  node.close();
  this->send_stanza(node);
}

365
void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, const std::string& to)
366 367 368 369 370 371
{
  XmlNode message("message");
  message["to"] = to;
  message["from"] = from + "@" + this->served_hostname;
  message["type"] = "groupchat";
  XmlNode subject("subject");
372
  subject.set_inner(std::get<0>(topic));
373 374 375 376 377
  subject.close();
  message.add_child(std::move(subject));
  message.close();
  this->send_stanza(message);
}
louiz’'s avatar
louiz’ committed
378

379
void XmppComponent::send_muc_message(const std::string& muc_name, const std::string& nick, Xmpp::body&& xmpp_body, const std::string& jid_to)
louiz’'s avatar
louiz’ committed
380 381 382
{
  Stanza message("message");
  message["to"] = jid_to;
louiz’'s avatar
louiz’ committed
383 384 385 386
  if (!nick.empty())
    message["from"] = muc_name + "@" + this->served_hostname + "/" + nick;
  else // Message from the room itself
    message["from"] = muc_name + "@" + this->served_hostname;
louiz’'s avatar
louiz’ committed
387 388
  message["type"] = "groupchat";
  XmlNode body("body");
389
  body.set_inner(std::get<0>(xmpp_body));
louiz’'s avatar
louiz’ committed
390 391
  body.close();
  message.add_child(std::move(body));
392 393 394 395 396 397 398 399 400
  if (std::get<1>(xmpp_body))
    {
      XmlNode html("html");
      html["xmlns"] = XHTMLIM_NS;
      // Pass the ownership of the pointer to this xmlnode
      html.add_child(std::get<1>(xmpp_body).release());
      html.close();
      message.add_child(std::move(html));
    }
louiz’'s avatar
louiz’ committed
401 402 403
  message.close();
  this->send_stanza(message);
}
louiz’'s avatar
louiz’ committed
404

405
void XmppComponent::send_muc_leave(std::string&& muc_name, std::string&& nick, Xmpp::body&& message, const std::string& jid_to, const bool self)
louiz’'s avatar
louiz’ committed
406 407 408 409 410
{
  Stanza presence("presence");
  presence["to"] = jid_to;
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + nick;
  presence["type"] = "unavailable";
411
  const std::string message_str = std::get<0>(message);
412
  if (!message_str.empty() || self)
louiz’'s avatar
louiz’ committed
413 414
    {
      XmlNode status("status");
415 416
      if (!message_str.empty())
        status.set_inner(message_str);
louiz’'s avatar
louiz’ committed
417 418 419 420 421 422 423 424
      if (self)
        status["code"] = "110";
      status.close();
      presence.add_child(std::move(status));
    }
  presence.close();
  this->send_stanza(presence);
}
louiz’'s avatar
louiz’ committed
425

426 427 428 429 430 431 432
void XmppComponent::send_nick_change(const std::string& muc_name,
                                     const std::string& old_nick,
                                     const std::string& new_nick,
                                     const std::string& affiliation,
                                     const std::string& role,
                                     const std::string& jid_to,
                                     const bool self)
louiz’'s avatar
louiz’ committed
433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
{
  Stanza presence("presence");
  presence["to"] = jid_to;
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + old_nick;
  presence["type"] = "unavailable";
  XmlNode x("x");
  x["xmlns"] = MUC_USER_NS;
  XmlNode item("item");
  item["nick"] = new_nick;
  item.close();
  x.add_child(std::move(item));
  XmlNode status("status");
  status["code"] = "303";
  status.close();
  x.add_child(std::move(status));
  if (self)
    {
      XmlNode status2("status");
      status2["code"] = "110";
      status2.close();
      x.add_child(std::move(status2));
    }
  x.close();
  presence.add_child(std::move(x));
  presence.close();
  this->send_stanza(presence);

460
  this->send_user_join(muc_name, new_nick, "", affiliation, role, jid_to, self);
louiz’'s avatar
louiz’ committed
461
}
462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

void XmppComponent::kick_user(const std::string& muc_name,
                                  const std::string& target,
                                  const std::string& txt,
                                  const std::string& author,
                                  const std::string& jid_to)
{
  Stanza presence("presence");
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + target;
  presence["to"] = jid_to;
  presence["type"] = "unavailable";
  XmlNode x("x");
  x["xmlns"] = MUC_USER_NS;
  XmlNode item("item");
  item["affiliation"] = "none";
  item["role"] = "none";
  XmlNode actor("actor");
  actor["nick"] = author;
  actor["jid"] = author; // backward compatibility with old clients
  actor.close();
  item.add_child(std::move(actor));
  XmlNode reason("reason");
  reason.set_inner(txt);
  reason.close();
  item.add_child(std::move(reason));
  item.close();
  x.add_child(std::move(item));
  XmlNode status("status");
  status["code"] = "307";
  status.close();
  x.add_child(std::move(status));
  x.close();
  presence.add_child(std::move(x));
  presence.close();
  this->send_stanza(presence);
}
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522

void XmppComponent::send_nickname_conflict_error(const std::string& muc_name,
                                                 const std::string& nickname,
                                                 const std::string& jid_to)
{
  Stanza presence("presence");
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + nickname;
  presence["to"] = jid_to;
  XmlNode x("x");
  x["xmlns"] = MUC_NS;
  x.close();
  presence.add_child(std::move(x));
  XmlNode error("error");
  error["by"] = muc_name + "@" + this->served_hostname;
  error["type"] = "cancel";
  error["code"] = "409";
  XmlNode conflict("conflict");
  conflict["xmlns"] = STANZA_NS;
  conflict.close();
  error.add_child(std::move(conflict));
  error.close();
  presence.add_child(std::move(error));
  presence.close();
  this->send_stanza(presence);
}
523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544

void XmppComponent::send_affiliation_role_change(const std::string& muc_name,
                                                 const std::string& target,
                                                 const std::string& affiliation,
                                                 const std::string& role,
                                                 const std::string& jid_to)
{
  Stanza presence("presence");
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + target;
  presence["to"] = jid_to;
  XmlNode x("x");
  x["xmlns"] = MUC_USER_NS;
  XmlNode item("item");
  item["affiliation"] = affiliation;
  item["role"] = role;
  item.close();
  x.add_child(std::move(item));
  x.close();
  presence.add_child(std::move(x));
  presence.close();
  this->send_stanza(presence);
}