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>

louiz’'s avatar
louiz’ committed
9
#include <stdexcept>
10 11
#include <iostream>

12
#include <stdio.h>
13

14 15 16 17
#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"
18
#define MUC_ADMIN_NS     MUC_NS"#admin"
19 20 21
#define DISCO_NS         "http://jabber.org/protocol/disco"
#define DISCO_ITEMS_NS   DISCO_NS"#items"
#define DISCO_INFO_NS    DISCO_NS"#info"
22
#define XHTMLIM_NS       "http://jabber.org/protocol/xhtml-im"
23
#define STANZA_NS        "urn:ietf:params:xml:ns:xmpp-stanzas"
louiz’'s avatar
louiz’ committed
24
#define STREAMS_NS       "urn:ietf:params:xml:ns:xmpp-streams"
25

26 27 28
XmppComponent::XmppComponent(const std::string& hostname, const std::string& secret):
  served_hostname(hostname),
  secret(secret),
louiz’'s avatar
louiz’ committed
29 30
  authenticated(false),
  doc_open(false)
31 32 33 34 35 36 37
{
  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));
38
  this->stanza_handlers.emplace(COMPONENT_NS":handshake",
39
                                std::bind(&XmppComponent::handle_handshake, this,std::placeholders::_1));
40
  this->stanza_handlers.emplace(COMPONENT_NS":presence",
41
                                std::bind(&XmppComponent::handle_presence, this,std::placeholders::_1));
42
  this->stanza_handlers.emplace(COMPONENT_NS":message",
louiz’'s avatar
louiz’ committed
43
                                std::bind(&XmppComponent::handle_message, this,std::placeholders::_1));
44 45
  this->stanza_handlers.emplace(COMPONENT_NS":iq",
                                std::bind(&XmppComponent::handle_iq, this,std::placeholders::_1));
louiz’'s avatar
louiz’ committed
46 47
  this->stanza_handlers.emplace(STREAM_NS":error",
                                std::bind(&XmppComponent::handle_error, this,std::placeholders::_1));
48 49 50 51 52 53
}

XmppComponent::~XmppComponent()
{
}

54
void XmppComponent::start()
55
{
56
  this->connect("127.0.0.1", "5347");
57 58
}

louiz’'s avatar
louiz’ committed
59 60 61 62 63
bool XmppComponent::is_document_open() const
{
  return this->doc_open;
}

64 65
void XmppComponent::send_stanza(const Stanza& stanza)
{
louiz’'s avatar
louiz’ committed
66 67 68
  std::string str = stanza.to_string();
  log_debug("XMPP SENDING: " << str);
  this->send_data(std::move(str));
69 70
}

71 72 73 74 75
void XmppComponent::on_connection_failed(const std::string& reason)
{
  log_error("Failed to connect to the XMPP server: " << reason);
}

76 77
void XmppComponent::on_connected()
{
louiz’'s avatar
louiz’ committed
78
  log_info("connected to XMPP server");
79
  XmlNode node("stream:stream", nullptr);
80 81
  node["xmlns"] = COMPONENT_NS;
  node["xmlns:stream"] = STREAM_NS;
82
  node["to"] = this->served_hostname;
83
  this->send_stanza(node);
louiz’'s avatar
louiz’ committed
84
  this->doc_open = true;
85 86 87 88
}

void XmppComponent::on_connection_close()
{
louiz’'s avatar
louiz’ committed
89
  log_info("XMPP server closed connection");
90 91 92 93
}

void XmppComponent::parse_in_buffer()
{
94
  this->parser.feed(this->in_buf.data(), this->in_buf.size(), false);
95 96 97
  this->in_buf.clear();
}

louiz’'s avatar
louiz’ committed
98 99 100 101 102 103 104 105
void XmppComponent::shutdown()
{
  for (auto it = this->bridges.begin(); it != this->bridges.end(); ++it)
  {
    it->second->shutdown();
  }
}

louiz’'s avatar
louiz’ committed
106 107
void XmppComponent::clean()
{
louiz’'s avatar
louiz’ committed
108 109
  auto it = this->bridges.begin();
  while (it != this->bridges.end())
louiz’'s avatar
louiz’ committed
110 111
  {
    it->second->clean();
112
    if (it->second->active_clients() == 0)
louiz’'s avatar
louiz’ committed
113 114 115
      it = this->bridges.erase(it);
    else
      ++it;
louiz’'s avatar
louiz’ committed
116 117 118
  }
}

119 120
void XmppComponent::on_remote_stream_open(const XmlNode& node)
{
louiz’'s avatar
louiz’ committed
121
  log_debug("XMPP DOCUMENT OPEN: " << node.to_string());
122 123 124 125 126 127
  try
    {
      this->stream_id = node["id"];
    }
  catch (const AttributeNotFound& e)
    {
louiz’'s avatar
louiz’ committed
128
      log_error("Error: no attribute 'id' found");
129 130 131 132 133 134
      this->send_stream_error("bad-format", "missing 'id' attribute");
      this->close_document();
      return ;
    }

  // Try to authenticate
135 136 137 138 139 140 141 142 143 144 145
  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");
146 147 148 149 150 151 152
  handshake.set_inner(digest);
  handshake.close();
  this->send_stanza(handshake);
}

void XmppComponent::on_remote_stream_close(const XmlNode& node)
{
louiz’'s avatar
louiz’ committed
153
  log_debug("XMPP DOCUMENT CLOSE " << node.to_string());
154 155 156 157
}

void XmppComponent::on_stanza(const Stanza& stanza)
{
louiz’'s avatar
louiz’ committed
158
  log_debug("XMPP RECEIVING: " << stanza.to_string());
159
  std::function<void(const Stanza&)> handler;
160 161
  try
    {
162
      handler = this->stanza_handlers.at(stanza.get_name());
163 164 165
    }
  catch (const std::out_of_range& exception)
    {
louiz’'s avatar
louiz’ committed
166
      log_warning("No handler for stanza of type " << stanza.get_name());
167 168
      return;
    }
169
  handler(stanza);
170 171 172 173 174 175
}

void XmppComponent::send_stream_error(const std::string& name, const std::string& explanation)
{
  XmlNode node("stream:error", nullptr);
  XmlNode error(name, nullptr);
176
  error["xmlns"] = STREAM_NS;
177 178 179 180 181 182 183 184 185 186
  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
187
  log_debug("XMPP SENDING: </stream:stream>");
188
  this->send_data("</stream:stream>");
louiz’'s avatar
louiz’ committed
189
  this->doc_open = false;
190 191 192 193
}

void XmppComponent::handle_handshake(const Stanza& stanza)
{
194
  (void)stanza;
195
  this->authenticated = true;
louiz’'s avatar
louiz’ committed
196
  log_info("Authenticated with the XMPP server");
197
}
198 199 200 201 202 203

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
204 205 206 207 208 209 210 211 212
  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
213 214 215 216
        {
          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);
217
          bridge->join_irc_channel(iid, to.resource);
louiz’'s avatar
louiz’ committed
218
        }
louiz’'s avatar
louiz’ committed
219 220
      else if (type == "unavailable")
        {
221
          XmlNode* status = stanza.get_child(COMPONENT_NS":status");
louiz’'s avatar
louiz’ committed
222 223 224
          bridge->leave_irc_channel(std::move(iid), status ? std::move(status->get_inner()) : "");
        }
    }
225 226
}

louiz’'s avatar
louiz’ committed
227 228 229 230 231
void XmppComponent::handle_message(const Stanza& stanza)
{
  Bridge* bridge = this->get_user_bridge(stanza["from"]);
  Jid to(stanza["to"]);
  Iid iid(to.local);
232
  XmlNode* body = stanza.get_child(COMPONENT_NS":body");
louiz’'s avatar
louiz’ committed
233 234 235 236 237
  if (stanza["type"] == "groupchat")
    {
      if (to.resource.empty())
        if (body && !body->get_inner().empty())
          bridge->send_channel_message(iid, body->get_inner());
238 239 240
      XmlNode* subject = stanza.get_child(COMPONENT_NS":subject");
      if (subject)
        bridge->set_channel_topic(iid, subject->get_inner());
louiz’'s avatar
louiz’ committed
241
    }
louiz’'s avatar
louiz’ committed
242 243 244 245 246
  else
    {
      if (body && !body->get_inner().empty())
        bridge->send_private_message(iid, body->get_inner());
    }
louiz’'s avatar
louiz’ committed
247 248
}

249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
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
289 290 291 292 293 294 295 296 297
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);
}

298 299 300 301 302 303 304 305 306 307 308 309 310
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();
    }
}

311
void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, const std::string& to)
312 313 314 315 316
{
  XmlNode node("message");
  node["to"] = to;
  node["from"] = from + "@" + this->served_hostname;
  XmlNode body_node("body");
317
  body_node.set_inner(std::get<0>(body));
318 319 320 321 322 323
  body_node.close();
  node.add_child(std::move(body_node));
  node.close();
  this->send_stanza(node);
}

324 325 326
void XmppComponent::send_user_join(const std::string& from,
                                   const std::string& nick,
                                   const std::string& realjid,
327 328 329 330
                                   const std::string& affiliation,
                                   const std::string& role,
                                   const std::string& to,
                                   const bool self)
331 332 333 334 335 336
{
  XmlNode node("presence");
  node["to"] = to;
  node["from"] = from + "@" + this->served_hostname + "/" + nick;

  XmlNode x("x");
337
  x["xmlns"] = MUC_USER_NS;
338 339

  XmlNode item("item");
340 341 342 343
  if (!affiliation.empty())
    item["affiliation"] = affiliation;
  if (!role.empty())
    item["role"] = role;
344 345 346 347 348 349
  if (!realjid.empty())
    {
      const std::string preped_jid = jidprep(realjid);
      if (!preped_jid.empty())
        item["jid"] = preped_jid;
    }
350
  item.close();
351
  x.add_child(std::move(item));
352

353 354 355 356 357 358 359
  if (self)
    {
      XmlNode status("status");
      status["code"] = "110";
      status.close();
      x.add_child(std::move(status));
    }
360 361 362 363 364 365
  x.close();
  node.add_child(std::move(x));
  node.close();
  this->send_stanza(node);
}

366
void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, const std::string& to)
367 368 369 370 371 372
{
  XmlNode message("message");
  message["to"] = to;
  message["from"] = from + "@" + this->served_hostname;
  message["type"] = "groupchat";
  XmlNode subject("subject");
373
  subject.set_inner(std::get<0>(topic));
374 375 376 377 378
  subject.close();
  message.add_child(std::move(subject));
  message.close();
  this->send_stanza(message);
}
louiz’'s avatar
louiz’ committed
379

380
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
381 382 383
{
  Stanza message("message");
  message["to"] = jid_to;
louiz’'s avatar
louiz’ committed
384 385 386 387
  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
388 389
  message["type"] = "groupchat";
  XmlNode body("body");
390
  body.set_inner(std::get<0>(xmpp_body));
louiz’'s avatar
louiz’ committed
391 392
  body.close();
  message.add_child(std::move(body));
393 394 395 396 397 398 399 400 401
  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
402 403 404
  message.close();
  this->send_stanza(message);
}
louiz’'s avatar
louiz’ committed
405

406
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
407 408 409 410 411
{
  Stanza presence("presence");
  presence["to"] = jid_to;
  presence["from"] = muc_name + "@" + this->served_hostname + "/" + nick;
  presence["type"] = "unavailable";
412
  const std::string message_str = std::get<0>(message);
413
  if (!message_str.empty() || self)
louiz’'s avatar
louiz’ committed
414 415
    {
      XmlNode status("status");
416 417
      if (!message_str.empty())
        status.set_inner(message_str);
louiz’'s avatar
louiz’ committed
418 419 420 421 422 423 424 425
      if (self)
        status["code"] = "110";
      status.close();
      presence.add_child(std::move(status));
    }
  presence.close();
  this->send_stanza(presence);
}
louiz’'s avatar
louiz’ committed
426

427 428 429 430 431 432 433
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
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
{
  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);

461
  this->send_user_join(muc_name, new_nick, "", affiliation, role, jid_to, self);
louiz’'s avatar
louiz’ committed
462
}
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498

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);
}
499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523

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);
}
524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545

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);
}