irc_client.cpp 18.1 KB
Newer Older
1
#include <irc/irc_message.hpp>
2 3 4 5 6
#include <irc/irc_client.hpp>
#include <bridge/bridge.hpp>
#include <irc/irc_user.hpp>

#include <utils/make_unique.hpp>
louiz’'s avatar
louiz’ committed
7
#include <logger/logger.hpp>
louiz’'s avatar
louiz’ committed
8
#include <utils/tolower.hpp>
9
#include <utils/split.hpp>
10 11 12 13

#include <iostream>
#include <stdexcept>

14 15 16
IrcClient::IrcClient(const std::string& hostname, const std::string& username, Bridge* bridge):
  hostname(hostname),
  username(username),
louiz’'s avatar
louiz’ committed
17 18
  current_nick(username),
  bridge(bridge),
louiz’'s avatar
louiz’ committed
19 20
  welcomed(false),
  chanmodes({"", "", "", ""})
21 22 23 24 25 26 27
{
}

IrcClient::~IrcClient()
{
}

28 29 30 31 32
void IrcClient::start()
{
  this->connect(this->hostname, "6667");
}

louiz’'s avatar
louiz’ committed
33 34
void IrcClient::on_connected()
{
35 36
  this->send_nick_command(this->username);
  this->send_user_command(this->username, this->username);
37
  this->send_gateway_message("Connected to IRC server.");
louiz’'s avatar
louiz’ committed
38 39
}

40 41
void IrcClient::on_connection_close()
{
42 43 44
  static const std::string message = "Connection closed by remote server.";
  this->send_gateway_message(message);
  log_warning(message);
45 46
}

47 48 49 50 51 52 53 54 55 56 57 58 59
IrcChannel* IrcClient::get_channel(const std::string& name)
{
  try
    {
      return this->channels.at(name).get();
    }
  catch (const std::out_of_range& exception)
    {
      this->channels.emplace(name, std::make_unique<IrcChannel>());
      return this->channels.at(name).get();
    }
}

louiz’'s avatar
louiz’ committed
60 61
bool IrcClient::is_channel_joined(const std::string& name)
{
louiz’'s avatar
louiz’ committed
62 63
  IrcChannel* channel = this->get_channel(name);
  return channel->joined;
louiz’'s avatar
louiz’ committed
64 65
}

louiz’'s avatar
louiz’ committed
66 67 68 69 70
std::string IrcClient::get_own_nick() const
{
  return this->current_nick;
}

71 72
void IrcClient::parse_in_buffer()
{
louiz’'s avatar
louiz’ committed
73 74 75 76 77 78
  while (true)
    {
      auto pos = this->in_buf.find("\r\n");
      if (pos == std::string::npos)
        break ;
      IrcMessage message(this->in_buf.substr(0, pos));
louiz’'s avatar
louiz’ committed
79
      log_debug("IRC RECEIVING: " << message);
louiz’'s avatar
louiz’ committed
80
      this->in_buf = this->in_buf.substr(pos + 2, std::string::npos);
81 82 83 84
      auto cb = irc_callbacks.find(message.command);
      if (cb != irc_callbacks.end())
        (this->*(cb->second))(message);
      else
louiz’'s avatar
louiz’ committed
85
        log_info("No handler for command " << message.command);
louiz’'s avatar
louiz’ committed
86 87 88 89 90
    }
}

void IrcClient::send_message(IrcMessage&& message)
{
louiz’'s avatar
louiz’ committed
91
  log_debug("IRC SENDING: " << message);
louiz’'s avatar
louiz’ committed
92 93 94 95 96 97
  std::string res;
  if (!message.prefix.empty())
    res += ":" + std::move(message.prefix) + " ";
  res += std::move(message.command);
  for (const std::string& arg: message.arguments)
    {
louiz’'s avatar
:3  
louiz’ committed
98
      if (arg.find(" ") != std::string::npos ||
louiz’'s avatar
louiz’ committed
99
          (!arg.empty() && arg[0] == ':'))
louiz’'s avatar
louiz’ committed
100 101 102 103 104 105 106
        {
          res += " :" + arg;
          break;
        }
      res += " " + arg;
    }
  res += "\r\n";
107
  this->send_data(std::move(res));
louiz’'s avatar
louiz’ committed
108 109 110 111
}

void IrcClient::send_user_command(const std::string& username, const std::string& realname)
{
louiz’'s avatar
louiz’ committed
112
  this->send_message(IrcMessage("USER", {username, "ignored", "ignored", realname}));
louiz’'s avatar
louiz’ committed
113 114 115 116 117 118 119
}

void IrcClient::send_nick_command(const std::string& nick)
{
  this->send_message(IrcMessage("NICK", {nick}));
}

120 121 122 123 124
void IrcClient::send_kick_command(const std::string& chan_name, const std::string& target, const std::string& reason)
{
  this->send_message(IrcMessage("KICK", {chan_name, target, reason}));
}

125 126 127 128 129
void IrcClient::send_topic_command(const std::string& chan_name, const std::string& topic)
{
  this->send_message(IrcMessage("TOPIC", {chan_name, topic}));
}

louiz’'s avatar
louiz’ committed
130 131 132 133 134
void IrcClient::send_quit_command()
{
  this->send_message(IrcMessage("QUIT", {"gateway shutdown"}));
}

louiz’'s avatar
louiz’ committed
135 136
void IrcClient::send_join_command(const std::string& chan_name)
{
137 138
  if (!this->connected)
    this->start();
louiz’'s avatar
louiz’ committed
139
  if (this->welcomed == false)
louiz’'s avatar
louiz’ committed
140 141 142
    this->channels_to_join.push_back(chan_name);
  else
    this->send_message(IrcMessage("JOIN", {chan_name}));
143 144
}

louiz’'s avatar
louiz’ committed
145
bool IrcClient::send_channel_message(const std::string& chan_name, const std::string& body)
146
{
louiz’'s avatar
louiz’ committed
147 148 149
  IrcChannel* channel = this->get_channel(chan_name);
  if (channel->joined == false)
    {
louiz’'s avatar
louiz’ committed
150
      log_warning("Cannot send message to channel " << chan_name << ", it is not joined");
louiz’'s avatar
louiz’ committed
151 152
      return false;
    }
153 154 155 156 157 158 159 160 161
  // Cut the message body into 400-bytes parts (because the whole command
  // must fit into 512 bytes, that's an easy way to make sure the chan name
  // + body fits. I’m lazy.)
  std::string::size_type pos = 0;
  while (pos < body.size())
    {
      this->send_message(IrcMessage("PRIVMSG", {chan_name, body.substr(pos, 400)}));
      pos += 400;
    }
louiz’'s avatar
louiz’ committed
162 163 164
  return true;
}

louiz’'s avatar
louiz’ committed
165 166
void IrcClient::send_private_message(const std::string& username, const std::string& body)
{
167 168 169 170 171 172 173
  std::string::size_type pos = 0;
  while (pos < body.size())
    {
      this->send_message(IrcMessage("PRIVMSG", {username, body.substr(pos, 400)}));
      pos += 400;
    }

louiz’'s avatar
louiz’ committed
174 175
}

louiz’'s avatar
louiz’ committed
176 177 178 179
void IrcClient::send_part_command(const std::string& chan_name, const std::string& status_message)
{
  IrcChannel* channel = this->get_channel(chan_name);
  if (channel->joined == true)
louiz’'s avatar
louiz’ committed
180 181 182 183 184 185 186 187 188
    this->send_message(IrcMessage("PART", {chan_name, status_message}));
}

void IrcClient::send_mode_command(const std::string& chan_name, const std::vector<std::string>& arguments)
{
  std::vector<std::string> args(arguments);
  args.insert(args.begin(), chan_name);
  IrcMessage m("MODE", std::move(args));
  this->send_message(std::move(m));
louiz’'s avatar
louiz’ committed
189 190
}

louiz’'s avatar
louiz’ committed
191 192 193 194
void IrcClient::send_pong_command(const IrcMessage& message)
{
  const std::string id = message.arguments[0];
  this->send_message(IrcMessage("PONG", {id}));
195 196 197 198 199 200 201 202 203
}

void IrcClient::forward_server_message(const IrcMessage& message)
{
  const std::string from = message.prefix;
  const std::string body = message.arguments[1];

  this->bridge->send_xmpp_message(this->hostname, from, body);
}
louiz’'s avatar
louiz’ committed
204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225

void IrcClient::on_isupport_message(const IrcMessage& message)
{
  const size_t len = message.arguments.size();
  for (size_t i = 1; i < len; ++i)
  {
    const std::string token = message.arguments[i];
    if (token.substr(0, 10) == "CHANMODES=")
    {
      this->chanmodes = utils::split(token.substr(11), ',');
      // make sure we have 4 strings
      this->chanmodes.resize(4);
    }
    else if (token.substr(0, 7) == "PREFIX=")
      {
        size_t i = 8;           // jump PREFIX=(
        size_t j = 9;
        // Find the ) char
        while (j < token.size() && token[j] != ')')
          j++;
        j++;
        while (j < token.size() && token[i] != ')')
226 227 228 229
          {
            this->sorted_user_modes.push_back(token[i]);
            this->prefix_to_mode[token[j++]] = token[i++];
          }
louiz’'s avatar
louiz’ committed
230 231 232
      }
  }
}
233

234 235 236 237 238
void IrcClient::send_gateway_message(const std::string& message, const std::string& from)
{
  this->bridge->send_xmpp_message(this->hostname, from, message);
}

239 240
void IrcClient::set_and_forward_user_list(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
241
  const std::string chan_name = utils::tolower(message.arguments[2]);
242 243 244 245
  IrcChannel* channel = this->get_channel(chan_name);
  std::vector<std::string> nicks = utils::split(message.arguments[3], ' ');
  for (const std::string& nick: nicks)
    {
246
      const IrcUser* user = channel->add_user(nick, this->prefix_to_mode);
247 248
      if (user->nick != channel->get_self()->nick)
        {
louiz’'s avatar
louiz’ committed
249
          log_debug("Adding user [" << nick << "] to chan " << chan_name);
250 251 252 253 254 255
          this->bridge->send_user_join(this->hostname, chan_name, user, false);
        }
      else
        {
          // we now know the modes of self, so copy the modes into self
          channel->get_self()->modes = user->modes;
256 257 258 259
        }
    }
}

louiz’'s avatar
louiz’ committed
260
void IrcClient::on_channel_join(const IrcMessage& message)
261
{
louiz’'s avatar
louiz’ committed
262
  const std::string chan_name = utils::tolower(message.arguments[0]);
263
  IrcChannel* channel = this->get_channel(chan_name);
louiz’'s avatar
louiz’ committed
264 265 266 267 268 269 270 271
  const std::string nick = message.prefix;
  if (channel->joined == false)
    {
      channel->joined = true;
      channel->set_self(nick);
    }
  else
    {
272 273
      const IrcUser* user = channel->add_user(nick, this->prefix_to_mode);
      this->bridge->send_user_join(this->hostname, chan_name, user, false);
louiz’'s avatar
louiz’ committed
274
    }
275 276
}

louiz’'s avatar
louiz’ committed
277 278 279 280 281
void IrcClient::on_channel_message(const IrcMessage& message)
{
  const IrcUser user(message.prefix);
  const std::string nick = user.nick;
  Iid iid;
282
  iid.chan = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
283 284
  iid.server = this->hostname;
  const std::string body = message.arguments[1];
louiz’'s avatar
louiz’ committed
285 286 287 288 289 290
  bool muc = true;
  if (!this->get_channel(iid.chan)->joined)
    {
      iid.chan = nick;
      muc = false;
    }
291 292 293 294 295 296 297 298
  if (!body.empty() && body[0] == '\01')
    {
      if (body.substr(1, 6) == "ACTION")
        this->bridge->send_message(iid, nick,
                  std::string("/me") + body.substr(7, body.size() - 8), muc);
    }
  else
    this->bridge->send_message(iid, nick, body, muc);
louiz’'s avatar
louiz’ committed
299 300
}

301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321
void IrcClient::empty_motd(const IrcMessage& message)
{
  (void)message;
  this->motd.erase();
}

void IrcClient::on_motd_line(const IrcMessage& message)
{
  const std::string body = message.arguments[1];
  // We could send the MOTD without a line break between each IRC-message,
  // but sometimes it contains some ASCII art, we use line breaks to keep
  // them intact.
  this->motd += body+"\n";
}

void IrcClient::send_motd(const IrcMessage& message)
{
  (void)message;
  this->bridge->send_xmpp_message(this->hostname, "", this->motd);
}

322 323
void IrcClient::on_topic_received(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
324
  const std::string chan_name = utils::tolower(message.arguments[1]);
325 326
  IrcChannel* channel = this->get_channel(chan_name);
  channel->topic = message.arguments[2];
louiz’'s avatar
louiz’ committed
327 328
  if (channel->joined)
    this->bridge->send_topic(this->hostname, chan_name, channel->topic);
329 330 331 332
}

void IrcClient::on_channel_completely_joined(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
333
  const std::string chan_name = utils::tolower(message.arguments[1]);
334
  IrcChannel* channel = this->get_channel(chan_name);
335
  this->bridge->send_user_join(this->hostname, chan_name, channel->get_self(), true);
336
  this->bridge->send_topic(this->hostname, chan_name, channel->topic);
337
}
louiz’'s avatar
louiz’ committed
338

339 340 341 342 343 344 345
void IrcClient::on_erroneous_nickname(const IrcMessage& message)
{
  const std::string error_msg = message.arguments.size() >= 3 ?
    message.arguments[2]: "Erroneous nickname";
  this->send_gateway_message(error_msg + ": " + message.arguments[1], message.prefix);
}

346 347 348 349 350 351 352 353 354 355 356 357 358
void IrcClient::on_nickname_conflict(const IrcMessage& message)
{
  const std::string nickname = message.arguments[1];
  this->on_generic_error(message);
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
  {
    Iid iid;
    iid.chan = it->first;
    iid.server = this->hostname;
    this->bridge->send_nickname_conflict_error(iid, nickname);
  }
}

359 360 361 362 363 364 365
void IrcClient::on_generic_error(const IrcMessage& message)
{
  const std::string error_msg = message.arguments.size() >= 3 ?
    message.arguments[2]: "Unspecified error";
  this->send_gateway_message(message.arguments[1] + ": " + error_msg, message.prefix);
}

louiz’'s avatar
louiz’ committed
366 367 368 369 370 371 372 373
void IrcClient::on_welcome_message(const IrcMessage& message)
{
  this->current_nick = message.arguments[0];
  this->welcomed = true;
  for (const std::string& chan_name: this->channels_to_join)
    this->send_join_command(chan_name);
  this->channels_to_join.clear();
}
louiz’'s avatar
louiz’ committed
374 375 376

void IrcClient::on_part(const IrcMessage& message)
{
louiz’'s avatar
louiz’ committed
377
  const std::string chan_name = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
378
  IrcChannel* channel = this->get_channel(chan_name);
379 380
  if (!channel->joined)
    return ;
louiz’'s avatar
louiz’ committed
381 382 383 384 385 386 387 388 389 390 391 392 393 394
  std::string txt;
  if (message.arguments.size() >= 2)
    txt = message.arguments[1];
  const IrcUser* user = channel->find_user(message.prefix);
  if (user)
    {
      std::string nick = user->nick;
      channel->remove_user(user);
      Iid iid;
      iid.chan = chan_name;
      iid.server = this->hostname;
      bool self = channel->get_self()->nick == nick;
      this->bridge->send_muc_leave(std::move(iid), std::move(nick), std::move(txt), self);
      if (self)
louiz’'s avatar
louiz’ committed
395
      {
louiz’'s avatar
louiz’ committed
396
        channel->joined = false;
louiz’'s avatar
louiz’ committed
397 398 399 400
        this->channels.erase(chan_name);
        // channel pointer is now invalid
        channel = nullptr;
      }
louiz’'s avatar
louiz’ committed
401 402
    }
}
louiz’'s avatar
louiz’ committed
403

louiz’'s avatar
louiz’ committed
404 405 406 407 408 409 410 411 412 413
void IrcClient::on_error(const IrcMessage& message)
{
  const std::string leave_message = message.arguments[0];
  // The user is out of all the channels
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
  {
    Iid iid;
    iid.chan = it->first;
    iid.server = this->hostname;
    IrcChannel* channel = it->second.get();
414 415
    if (!channel->joined)
      continue;
louiz’'s avatar
louiz’ committed
416 417 418
    std::string own_nick = channel->get_self()->nick;
    this->bridge->send_muc_leave(std::move(iid), std::move(own_nick), leave_message, true);
  }
louiz’'s avatar
louiz’ committed
419
  this->channels.clear();
420
  this->send_gateway_message(std::string("ERROR: ") + leave_message);
louiz’'s avatar
louiz’ committed
421 422
}

louiz’'s avatar
louiz’ committed
423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439
void IrcClient::on_quit(const IrcMessage& message)
{
  std::string txt;
  if (message.arguments.size() >= 1)
    txt = message.arguments[0];
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
    {
      const std::string chan_name = it->first;
      IrcChannel* channel = it->second.get();
      const IrcUser* user = channel->find_user(message.prefix);
      if (user)
        {
          std::string nick = user->nick;
          channel->remove_user(user);
          Iid iid;
          iid.chan = chan_name;
          iid.server = this->hostname;
louiz’'s avatar
louiz’ committed
440
          this->bridge->send_muc_leave(std::move(iid), std::move(nick), txt, false);
louiz’'s avatar
louiz’ committed
441 442 443
        }
    }
}
louiz’'s avatar
louiz’ committed
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470

void IrcClient::on_nick(const IrcMessage& message)
{
  const std::string new_nick = message.arguments[0];
  for (auto it = this->channels.begin(); it != this->channels.end(); ++it)
    {
      const std::string chan_name = it->first;
      IrcChannel* channel = it->second.get();
      IrcUser* user = channel->find_user(message.prefix);
      if (user)
        {
          std::string old_nick = user->nick;
          Iid iid;
          iid.chan = chan_name;
          iid.server = this->hostname;
          bool self = channel->get_self()->nick == old_nick;
          this->bridge->send_nick_change(std::move(iid), old_nick, new_nick, self);
          user->nick = new_nick;
          if (self)
            {
              channel->get_self()->nick = new_nick;
              this->current_nick = new_nick;
            }
        }
    }
}

471 472 473 474
void IrcClient::on_kick(const IrcMessage& message)
{
  const std::string target = message.arguments[1];
  const std::string reason = message.arguments[2];
louiz’'s avatar
louiz’ committed
475
  const std::string chan_name = utils::tolower(message.arguments[0]);
476
  IrcChannel* channel = this->get_channel(chan_name);
477 478
  if (!channel->joined)
    return ;
479 480 481 482 483 484 485 486 487
  if (channel->get_self()->nick == target)
    channel->joined = false;
  IrcUser author(message.prefix);
  Iid iid;
  iid.chan = chan_name;
  iid.server = this->hostname;
  this->bridge->kick_muc_user(std::move(iid), target, reason, author.nick);
}

louiz’'s avatar
louiz’ committed
488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
void IrcClient::on_mode(const IrcMessage& message)
{
  const std::string target = message.arguments[0];
  if (target[0] == '&' || target[0] == '#' ||
      target[0] == '!' || target[0] == '+')
    this->on_channel_mode(message);
  else
    this->on_user_mode(message);
}

void IrcClient::on_channel_mode(const IrcMessage& message)
{
  // For now, just transmit the modes so the user can know what happens
  // TODO, actually interprete the mode.
  Iid iid;
503
  iid.chan = utils::tolower(message.arguments[0]);
louiz’'s avatar
louiz’ committed
504 505
  iid.server = this->hostname;
  IrcUser user(message.prefix);
506 507 508 509 510 511 512 513 514 515
  std::string mode_arguments;
  for (size_t i = 1; i < message.arguments.size(); ++i)
    {
      if (!message.arguments[i].empty())
        {
          if (i != 1)
            mode_arguments += " ";
          mode_arguments += message.arguments[i];
        }
    }
louiz’'s avatar
louiz’ committed
516
  this->bridge->send_message(iid, "", std::string("Mode ") + iid.chan +
517
                                      " [" + mode_arguments + "] by " + user.nick,
louiz’'s avatar
louiz’ committed
518
                             true);
519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588
  const IrcChannel* channel = this->get_channel(iid.chan);
  if (!channel)
    return;

  // parse the received modes, we need to handle things like "+m-oo coucou toutou"
  const std::string modes = message.arguments[1];
  // a list of modified IrcUsers. When we applied all modes, we check the
  // modes that now applies to each of them, and send a notification for
  // each one. This is to disallow sending two notifications or more when a
  // single MODE command changes two or more modes on the same participant
  std::set<const IrcUser*> modified_users;
  // If it is true, the modes are added, if it’s false they are
  // removed. When we encounter the '+' char, the value is changed to true,
  // and with '-' it is changed to false.
  bool add = true;
  bool use_arg;
  size_t arg_pos = 2;
  for (const char c: modes)
    {
      if (c == '+')
        add = true;
      else if (c == '-')
        add = false;
      else
        { // lookup the mode symbol in the 4 chanmodes lists, depending on
          // the list where it is found, it takes an argument or not
          size_t type;
          for (type = 0; type < 4; ++type)
            if (this->chanmodes[type].find(c) != std::string::npos)
              break;
          if (type == 4)        // if mode was not found
            {
              // That mode can also be of type B if it is present in the
              // prefix_to_mode map
              for (const std::pair<char, char>& pair: this->prefix_to_mode)
                if (pair.second == c)
                  {
                    type = 1;
                    break;
                  }
            }
          // modes of type A, B or C (but only with add == true)
          if (type == 0 || type == 1 ||
              (type == 2 && add == true))
            use_arg = true;
          else // modes of type C (but only with add == false), D, or unknown
            use_arg = false;
          if (use_arg == true && message.arguments.size() > arg_pos)
            {
              const std::string target = message.arguments[arg_pos++];
              IrcUser* user = channel->find_user(target);
              if (!user)
                {
                  log_warning("Trying to set mode for non-existing user '" << target
                              << "' in channel" << iid.chan);
                  return;
                }
              if (add)
                user->add_mode(c);
              else
                user->remove_mode(c);
              modified_users.insert(user);
            }
        }
    }
  for (const IrcUser* u: modified_users)
    {
      char most_significant_mode = u->get_most_significant_mode(this->sorted_user_modes);
      this->bridge->send_affiliation_role_change(iid, u->nick, most_significant_mode);
    }
louiz’'s avatar
louiz’ committed
589 590 591 592 593 594 595 596
}

void IrcClient::on_user_mode(const IrcMessage& message)
{
  this->bridge->send_xmpp_message(this->hostname, "",
                                  std::string("User mode for ") + message.arguments[0] +
                                  " is [" + message.arguments[1] + "]");
}