src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include <cstdarg>
  18 #include "mode.h"
  19
  20 Channel::Channel(InspIRCd* Instance, const std::string &cname, time_t ts) : ServerInstance(Instance)
  21 {
  22         chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
  23         if (findchan != Instance->chanlist->end())
  24                 throw CoreException("Cannot create duplicate channel " + cname);
  25
  26         (*(ServerInstance->chanlist))[cname.c_str()] = this;
  27         this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
  28         this->created = ts ? ts : ServerInstance->Time();
  29         this->age = this->created;
  30
  31         maxbans = topicset = 0;
  32         modes.reset();
  33 }
  34
  35 void Channel::SetMode(char mode,bool mode_on)
  36 {
  37         modes[mode-65] = mode_on;
  38         if (!mode_on)
  39                 this->SetModeParam(mode,"",false);
  40 }
  41
  42
  43 void Channel::SetModeParam(char mode,const char* parameter,bool mode_on)
  44 {
  45         CustomModeList::iterator n = custom_mode_params.find(mode);
  46
  47         if (mode_on)
  48         {
  49                 if (n == custom_mode_params.end())
  50                         custom_mode_params[mode] = strdup(parameter);
  51         }
  52         else
  53         {
  54                 if (n != custom_mode_params.end())
  55                 {
  56                         free(n->second);
  57                         custom_mode_params.erase(n);
  58                 }
  59         }
  60 }
  61
  62 bool Channel::IsModeSet(char mode)
  63 {
  64         return modes[mode-65];
  65 }
  66
  67 std::string Channel::GetModeParameter(char mode)
  68 {
  69         CustomModeList::iterator n = custom_mode_params.find(mode);
  70         if (n != custom_mode_params.end())
  71                 return n->second;
  72         return "";
  73 }
  74
  75 int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
  76 {
  77         if (u && IS_LOCAL(u))
  78         {
  79                 if(!forceset)
  80                 {
  81                         int MOD_RESULT = 0;
  82                         /* 0: check status, 1: don't, -1: disallow change silently */
  83
  84                         FOREACH_RESULT(I_OnLocalTopicChange,OnLocalTopicChange(u,this,ntopic));
  85
  86                         if (MOD_RESULT == 1)
  87                                 return CMD_FAILURE;
  88                         else if (MOD_RESULT == 0)
  89                         {
  90                                 if (!this->HasUser(u))
  91                                 {
  92                                         u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
  93                                         return CMD_FAILURE;
  94                                 }
  95                                 if ((this->IsModeSet('t')) && (this->GetStatus(u) < STATUS_HOP))
  96                                 {
  97                                         u->WriteNumeric(482, "%s %s :You must be at least a half-operator to change the topic on this channel", u->nick.c_str(), this->name.c_str());
  98                                         return CMD_FAILURE;
  99                                 }
 100                         }
 101                 }
 102         }
 103
 104         this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
 105         if (u)
 106         {
 107                 this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
 108                 this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 109         }
 110         else
 111         {
 112                 this->setby.assign(ServerInstance->Config->ServerName);
 113                 this->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 114         }
 115
 116         this->topicset = ServerInstance->Time();
 117
 118         if (u && IS_LOCAL(u))
 119         {
 120                 FOREACH_MOD(I_OnPostLocalTopicChange,OnPostLocalTopicChange(u, this, this->topic));
 121         }
 122
 123         return CMD_SUCCESS;
 124 }
 125
 126 long Channel::GetUserCounter()
 127 {
 128         return (this->internal_userlist.size());
 129 }
 130
 131 void Channel::AddUser(User* user)
 132 {
 133         internal_userlist[user] = user->nick;
 134 }
 135
 136 unsigned long Channel::DelUser(User* user)
 137 {
 138         CUListIter a = internal_userlist.find(user);
 139
 140         if (a != internal_userlist.end())
 141         {
 142                 internal_userlist.erase(a);
 143                 /* And tidy any others... */
 144                 DelOppedUser(user);
 145                 DelHalfoppedUser(user);
 146                 DelVoicedUser(user);
 147         }
 148
 149         return internal_userlist.size();
 150 }
 151
 152 bool Channel::HasUser(User* user)
 153 {
 154         return (internal_userlist.find(user) != internal_userlist.end());
 155 }
 156
 157 void Channel::AddOppedUser(User* user)
 158 {
 159         internal_op_userlist[user] = user->nick;
 160 }
 161
 162 void Channel::DelOppedUser(User* user)
 163 {
 164         CUListIter a = internal_op_userlist.find(user);
 165         if (a != internal_op_userlist.end())
 166         {
 167                 internal_op_userlist.erase(a);
 168                 return;
 169         }
 170 }
 171
 172 void Channel::AddHalfoppedUser(User* user)
 173 {
 174         internal_halfop_userlist[user] = user->nick;
 175 }
 176
 177 void Channel::DelHalfoppedUser(User* user)
 178 {
 179         CUListIter a = internal_halfop_userlist.find(user);
 180
 181         if (a != internal_halfop_userlist.end())
 182         {
 183                 internal_halfop_userlist.erase(a);
 184         }
 185 }
 186
 187 void Channel::AddVoicedUser(User* user)
 188 {
 189         internal_voice_userlist[user] = user->nick;
 190 }
 191
 192 void Channel::DelVoicedUser(User* user)
 193 {
 194         CUListIter a = internal_voice_userlist.find(user);
 195
 196         if (a != internal_voice_userlist.end())
 197         {
 198                 internal_voice_userlist.erase(a);
 199         }
 200 }
 201
 202 CUList* Channel::GetUsers()
 203 {
 204         return &internal_userlist;
 205 }
 206
 207 CUList* Channel::GetOppedUsers()
 208 {
 209         return &internal_op_userlist;
 210 }
 211
 212 CUList* Channel::GetHalfoppedUsers()
 213 {
 214         return &internal_halfop_userlist;
 215 }
 216
 217 CUList* Channel::GetVoicedUsers()
 218 {
 219         return &internal_voice_userlist;
 220 }
 221
 222 void Channel::SetDefaultModes()
 223 {
 224         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 225         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 226         std::string modeseq;
 227         std::string parameter;
 228
 229         list.GetToken(modeseq);
 230
 231         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 232         {
 233                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 234                 if (mode)
 235                 {
 236                         if (mode->GetNumParams(true))
 237                                 list.GetToken(parameter);
 238                         else
 239                                 parameter.clear();
 240
 241                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 242                 }
 243         }
 244 }
 245
 246 /*
 247  * add a channel to a user, creating the record for it if needed and linking
 248  * it to the user record
 249  */
 250 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 251 {
 252         if (!user || !cn)
 253                 return NULL;
 254
 255         char cname[MAXBUF];
 256         int MOD_RESULT = 0;
 257         std::string privs;
 258         Channel *Ptr;
 259
 260         /*
 261          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 262          * We restrict local users to MaxChans channels.
 263          * We restrict local operators to OperMaxChans channels.
 264          * This is a lot more logical than how it was formerly. -- w00t
 265          */
 266         if (IS_LOCAL(user) && !override)
 267         {
 268                 // Checking MyClass exists because we *may* get here with NULL, not 100% sure.
 269                 if (user->MyClass && user->MyClass->GetMaxChans())
 270                 {
 271                         if (user->chans.size() >= user->MyClass->GetMaxChans())
 272                         {
 273                                 user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 274                                 return NULL;
 275                         }
 276                 }
 277                 else
 278                 {
 279                         if (user->HasPrivPermission("channels/high-join-limit"))
 280                         {
 281                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 282                                 {
 283                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 284                                         return NULL;
 285                                 }
 286                         }
 287                         else
 288                         {
 289                                 if (user->chans.size() >= Instance->Config->MaxChans)
 290                                 {
 291                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 292                                         return NULL;
 293                                 }
 294                         }
 295                 }
 296         }
 297
 298         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 299         Ptr = Instance->FindChan(cname);
 300
 301         if (!Ptr)
 302         {
 303                 /*
 304                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 305                  */
 306                 if (!IS_LOCAL(user))
 307                 {
 308                         if (!TS)
 309                                 Instance->Logs->Log("CHANNEL",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cn);
 310                 }
 311                 else
 312                 {
 313                         privs = "@";
 314                 }
 315
 316                 if (IS_LOCAL(user) && override == false)
 317                 {
 318                         MOD_RESULT = 0;
 319                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, NULL, cname, privs, key ? key : ""));
 320                         if (MOD_RESULT == 1)
 321                                 return NULL;
 322                 }
 323
 324                 Ptr = new Channel(Instance, cname, TS);
 325         }
 326         else
 327         {
 328                 /* Already on the channel */
 329                 if (Ptr->HasUser(user))
 330                         return NULL;
 331
 332                 /*
 333                  * remote users are allowed us to bypass channel modes
 334                  * and bans (used by servers)
 335                  */
 336                 if (IS_LOCAL(user) && override == false)
 337                 {
 338                         MOD_RESULT = 0;
 339                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, Ptr, cname, privs, key ? key : ""));
 340                         if (MOD_RESULT == 1)
 341                         {
 342                                 return NULL;
 343                         }
 344                         else if (MOD_RESULT == 0)
 345                         {
 346                                 std::string ckey = Ptr->GetModeParameter('k');
 347                                 bool invited = user->IsInvited(Ptr->name.c_str());
 348                                 bool can_bypass = Instance->Config->InvBypassModes && invited;
 349
 350                                 if (!ckey.empty())
 351                                 {
 352                                         MOD_RESULT = 0;
 353                                         FOREACH_RESULT_I(Instance, I_OnCheckKey, OnCheckKey(user, Ptr, key ? key : ""));
 354                                         if (!MOD_RESULT)
 355                                         {
 356                                                 // If no key provided, or key is not the right one, and can't bypass +k (not invited or option not enabled)
 357                                                 if ((!key || ckey != key) && !can_bypass)
 358                                                 {
 359                                                         user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 360                                                         return NULL;
 361                                                 }
 362                                         }
 363                                 }
 364
 365                                 if (Ptr->IsModeSet('i'))
 366                                 {
 367                                         MOD_RESULT = 0;
 368                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 369                                         if (!MOD_RESULT)
 370                                         {
 371                                                 if (!invited)
 372                                                 {
 373                                                         user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 374                                                         return NULL;
 375                                                 }
 376                                         }
 377                                 }
 378
 379                                 std::string limit = Ptr->GetModeParameter('l');
 380                                 if (!limit.empty())
 381                                 {
 382                                         MOD_RESULT = 0;
 383                                         FOREACH_RESULT_I(Instance, I_OnCheckLimit, OnCheckLimit(user, Ptr));
 384                                         if (!MOD_RESULT)
 385                                         {
 386                                                 long llimit = atol(limit.c_str());
 387                                                 if (Ptr->GetUserCounter() >= llimit && !can_bypass)
 388                                                 {
 389                                                         user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 390                                                         return NULL;
 391                                                 }
 392                                         }
 393                                 }
 394
 395                                 if (Ptr->bans.size())
 396                                 {
 397                                         if (Ptr->IsBanned(user) && !can_bypass)
 398                                         {
 399                                                 user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 400                                                 return NULL;
 401                                         }
 402                                 }
 403
 404                                 /*
 405                                  * If the user has invites for this channel, remove them now
 406                                  * after a successful join so they don't build up.
 407                                  */
 408                                 if (invited)
 409                                 {
 410                                         user->RemoveInvite(Ptr->name.c_str());
 411                                 }
 412                         }
 413                 }
 414         }
 415
 416         /* As spotted by jilles, dont bother to set this on remote users */
 417         if (IS_LOCAL(user) && Ptr->GetUserCounter() == 0)
 418                 Ptr->SetDefaultModes();
 419
 420         return Channel::ForceChan(Instance, Ptr, user, privs, bursting);
 421 }
 422
 423 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting)
 424 {
 425         std::string nick = user->nick;
 426         bool silent = false;
 427
 428         Ptr->AddUser(user);
 429
 430         /* Just in case they have no permissions */
 431         user->chans[Ptr] = 0;
 432
 433         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 434         {
 435                 const char status = *x;
 436                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 437                 if (mh)
 438                 {
 439                         /* Set, and make sure that the mode handler knows this mode was now set */
 440                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 441                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 442
 443                         switch (mh->GetPrefix())
 444                         {
 445                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 446                                  * addressing operator[] creates it. If they do exist, it points to it.
 447                                  * At all other times where we dont want to create an item if it doesnt exist, we
 448                                  * must stick to ::find().
 449                                  */
 450                                 case '@':
 451                                         user->chans[Ptr] |= UCMODE_OP;
 452                                 break;
 453                                 case '%':
 454                                         user->chans[Ptr] |= UCMODE_HOP;
 455                                 break;
 456                                 case '+':
 457                                         user->chans[Ptr] |= UCMODE_VOICE;
 458                                 break;
 459                         }
 460                 }
 461         }
 462
 463         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 464
 465         if (!silent)
 466                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 467
 468         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 469         std::string ms = Instance->Modes->ModeString(user, Ptr);
 470         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 471                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 472
 473         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 474         if (IS_LOCAL(user))
 475         {
 476                 if (Ptr->topicset)
 477                 {
 478                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 479                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 480                 }
 481                 Ptr->UserList(user);
 482         }
 483         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 484         return Ptr;
 485 }
 486
 487 bool Channel::IsBanned(User* user)
 488 {
 489         char mask[MAXBUF];
 490         int MOD_RESULT = 0;
 491         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 492
 493         if (MOD_RESULT == -1)
 494                 return true;
 495         else if (MOD_RESULT == 0)
 496         {
 497                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 498                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 499                 {
 500                         if ((InspIRCd::Match(user->GetFullHost(),i->data, NULL)) || // host
 501                                 (InspIRCd::Match(user->GetFullRealHost(),i->data, NULL)) || // uncloaked host
 502                                 (InspIRCd::MatchCIDR(mask, i->data, NULL))) // ip
 503                         {
 504                                 return true;
 505                         }
 506                 }
 507         }
 508         return false;
 509 }
 510
 511 bool Channel::IsExtBanned(const std::string &str, char type)
 512 {
 513         int MOD_RESULT = 0;
 514         FOREACH_RESULT(I_OnCheckStringExtBan, OnCheckStringExtBan(str, this, type));
 515
 516         if (MOD_RESULT == -1)
 517                 return true;
 518         else if (MOD_RESULT == 0)
 519         {
 520                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 521                 {
 522                         if (i->data[0] != type || i->data[1] != ':')
 523                                 continue;
 524
 525                         // Iterate past char and : to get to the mask without doing a data copy(!)
 526                         std::string maskptr = i->data.substr(2);
 527                         ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 528
 529                         if (InspIRCd::Match(str, maskptr, NULL))
 530                                 return true;
 531                 }
 532         }
 533
 534         return false;
 535 }
 536
 537 bool Channel::IsExtBanned(User *user, char type)
 538 {
 539         int MOD_RESULT = 0;
 540         FOREACH_RESULT(I_OnCheckExtBan, OnCheckExtBan(user, this, type));
 541
 542         if (MOD_RESULT == -1)
 543                 return true;
 544         else if (MOD_RESULT == 0)
 545         {
 546                 char mask[MAXBUF];
 547                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 548
 549                 // XXX: we should probably hook cloaked hosts in here somehow too..
 550                 if (this->IsExtBanned(mask, type))
 551                         return true;
 552
 553                 if (this->IsExtBanned(user->GetFullHost(), type))
 554                         return true;
 555
 556                 if (this->IsExtBanned(user->GetFullRealHost(), type))
 557                         return true;
 558         }
 559
 560         return false;
 561 }
 562
 563 /* Channel::PartUser
 564  * remove a channel from a users record, and return the number of users left.
 565  * Therefore, if this function returns 0 the caller should delete the Channel.
 566  */
 567 long Channel::PartUser(User *user, std::string &reason)
 568 {
 569         bool silent = false;
 570
 571         if (!user)
 572                 return this->GetUserCounter();
 573
 574         UCListIter i = user->chans.find(this);
 575         if (i != user->chans.end())
 576         {
 577                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 578
 579                 if (!silent)
 580                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 581
 582                 user->chans.erase(i);
 583                 this->RemoveAllPrefixes(user);
 584         }
 585
 586         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 587         {
 588                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 589                 /* kill the record */
 590                 if (iter != ServerInstance->chanlist->end())
 591                 {
 592                         int MOD_RESULT = 0;
 593                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 594                         if (MOD_RESULT == 1)
 595                                 return 1; // delete halted by module
 596                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 597                         ServerInstance->chanlist->erase(iter);
 598                 }
 599                 return 0;
 600         }
 601
 602         return this->GetUserCounter();
 603 }
 604
 605 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 606 {
 607         bool silent = false;
 608
 609         if (!user || !reason)
 610                 return this->GetUserCounter();
 611
 612         if (IS_LOCAL(user))
 613         {
 614                 if (!this->HasUser(user))
 615                 {
 616                         /* Not on channel */
 617                         return this->GetUserCounter();
 618                 }
 619         }
 620
 621         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 622                 servername = ServerInstance->Config->ServerName;
 623
 624         if (triggerevents)
 625         {
 626                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 627         }
 628
 629         UCListIter i = user->chans.find(this);
 630         if (i != user->chans.end())
 631         {
 632                 if (!silent)
 633                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 634
 635                 user->chans.erase(i);
 636                 this->RemoveAllPrefixes(user);
 637         }
 638
 639         if (!this->DelUser(user))
 640         {
 641                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 642                 /* kill the record */
 643                 if (iter != ServerInstance->chanlist->end())
 644                 {
 645                         int MOD_RESULT = 0;
 646                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 647                         if (MOD_RESULT == 1)
 648                                 return 1; // delete halted by module
 649                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 650                         ServerInstance->chanlist->erase(iter);
 651                 }
 652                 return 0;
 653         }
 654
 655         return this->GetUserCounter();
 656 }
 657
 658 long Channel::KickUser(User *src, User *user, const char* reason)
 659 {
 660         bool silent = false;
 661
 662         if (!src || !user || !reason)
 663                 return this->GetUserCounter();
 664
 665         if (IS_LOCAL(src))
 666         {
 667                 if (!this->HasUser(user))
 668                 {
 669                         src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 670                         return this->GetUserCounter();
 671                 }
 672                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 673                 {
 674                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
 675                         return this->GetUserCounter();
 676                 }
 677                 int MOD_RESULT = 0;
 678
 679                 if (!ServerInstance->ULine(src->server))
 680                 {
 681                         MOD_RESULT = 0;
 682                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 683                         if (MOD_RESULT == 1)
 684                                 return this->GetUserCounter();
 685                 }
 686                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 687                 if (MOD_RESULT != -1)
 688                 {
 689                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 690                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 691                                 return this->GetUserCounter();
 692
 693                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 694                         {
 695                                 int them = this->GetStatus(src);
 696                                 int us = this->GetStatus(user);
 697                                 if ((them < STATUS_HOP) || (them < us))
 698                                 {
 699                                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 700                                         return this->GetUserCounter();
 701                                 }
 702                         }
 703                 }
 704         }
 705
 706         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 707
 708         UCListIter i = user->chans.find(this);
 709         if (i != user->chans.end())
 710         {
 711                 /* zap it from the channel list of the user */
 712                 if (!silent)
 713                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 714
 715                 user->chans.erase(i);
 716                 this->RemoveAllPrefixes(user);
 717         }
 718
 719         if (!this->DelUser(user))
 720         /* if there are no users left on the channel */
 721         {
 722                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 723
 724                 /* kill the record */
 725                 if (iter != ServerInstance->chanlist->end())
 726                 {
 727                         int MOD_RESULT = 0;
 728                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 729                         if (MOD_RESULT == 1)
 730                                 return 1; // delete halted by module
 731                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 732                         ServerInstance->chanlist->erase(iter);
 733                 }
 734                 return 0;
 735         }
 736
 737         return this->GetUserCounter();
 738 }
 739
 740 void Channel::WriteChannel(User* user, const char* text, ...)
 741 {
 742         char textbuffer[MAXBUF];
 743         va_list argsPtr;
 744
 745         if (!user || !text)
 746                 return;
 747
 748         va_start(argsPtr, text);
 749         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 750         va_end(argsPtr);
 751
 752         this->WriteChannel(user, std::string(textbuffer));
 753 }
 754
 755 void Channel::WriteChannel(User* user, const std::string &text)
 756 {
 757         CUList *ulist = this->GetUsers();
 758         char tb[MAXBUF];
 759
 760         if (!user)
 761                 return;
 762
 763         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 764         std::string out = tb;
 765
 766         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 767         {
 768                 if (IS_LOCAL(i->first))
 769                         i->first->Write(out);
 770         }
 771 }
 772
 773 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 774 {
 775         char textbuffer[MAXBUF];
 776         va_list argsPtr;
 777
 778         if (!text)
 779                 return;
 780
 781         va_start(argsPtr, text);
 782         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 783         va_end(argsPtr);
 784
 785         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 786 }
 787
 788 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 789 {
 790         CUList *ulist = this->GetUsers();
 791         char tb[MAXBUF];
 792
 793         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 794         std::string out = tb;
 795
 796         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 797         {
 798                 if (IS_LOCAL(i->first))
 799                         i->first->Write(out);
 800         }
 801 }
 802
 803 /* write formatted text from a source user to all users on a channel except
 804  * for the sender (for privmsg etc) */
 805 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 806 {
 807         char textbuffer[MAXBUF];
 808         va_list argsPtr;
 809
 810         if (!text)
 811                 return;
 812
 813         va_start(argsPtr, text);
 814         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 815         va_end(argsPtr);
 816
 817         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 818 }
 819
 820 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 821 {
 822         char textbuffer[MAXBUF];
 823         va_list argsPtr;
 824
 825         if (!text)
 826                 return;
 827
 828         va_start(argsPtr, text);
 829         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 830         va_end(argsPtr);
 831
 832         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 833 }
 834
 835 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 836 {
 837         CUList *ulist = this->GetUsers();
 838         char tb[MAXBUF];
 839
 840         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 841         std::string out = tb;
 842
 843         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 844         {
 845                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 846                 {
 847                         /* User doesnt have the status we're after */
 848                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 849                                 continue;
 850
 851                         if (serversource)
 852                                 i->first->WriteServ(text);
 853                         else
 854                                 i->first->Write(out);
 855                 }
 856         }
 857 }
 858
 859 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 860 {
 861         CUList except_list;
 862         except_list[user] = user->nick;
 863         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 864 }
 865
 866 /*
 867  * return a count of the users on a specific channel accounting for
 868  * invisible users who won't increase the count. e.g. for /LIST
 869  */
 870 int Channel::CountInvisible()
 871 {
 872         int count = 0;
 873         CUList *ulist= this->GetUsers();
 874         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 875         {
 876                 if (!(i->first->IsModeSet('i')))
 877                         count++;
 878         }
 879
 880         return count;
 881 }
 882
 883 char* Channel::ChanModes(bool showkey)
 884 {
 885         static char scratch[MAXBUF];
 886         static char sparam[MAXBUF];
 887         char* offset = scratch;
 888         std::string extparam;
 889
 890         *scratch = '\0';
 891         *sparam = '\0';
 892
 893         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 894         for(int n = 0; n < 64; n++)
 895         {
 896                 if(this->modes[n])
 897                 {
 898                         *offset++ = n + 65;
 899                         extparam.clear();
 900                         switch (n)
 901                         {
 902                                 case CM_KEY:
 903                                         // Unfortunately this must be special-cased, as we definitely don't want to always display key.
 904                                         if (showkey)
 905                                         {
 906                                                 extparam = this->GetModeParameter('k');
 907                                         }
 908                                         else
 909                                         {
 910                                                 extparam = "<key>";
 911                                         }
 912                                         break;
 913                                 case CM_NOEXTERNAL:
 914                                 case CM_TOPICLOCK:
 915                                 case CM_INVITEONLY:
 916                                 case CM_MODERATED:
 917                                 case CM_SECRET:
 918                                 case CM_PRIVATE:
 919                                         /* We know these have no parameters */
 920                                 break;
 921                                 default:
 922                                         extparam = this->GetModeParameter(n + 65);
 923                                 break;
 924                         }
 925                         if (!extparam.empty())
 926                         {
 927                                 charlcat(sparam,' ',MAXBUF);
 928                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 929                         }
 930                 }
 931         }
 932
 933         /* Null terminate scratch */
 934         *offset = '\0';
 935         strlcat(scratch,sparam,MAXBUF);
 936         return scratch;
 937 }
 938
 939 /* compile a userlist of a channel into a string, each nick seperated by
 940  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 941  */
 942 void Channel::UserList(User *user, CUList *ulist)
 943 {
 944         char list[MAXBUF];
 945         size_t dlen, curlen;
 946         int MOD_RESULT = 0;
 947         bool call_modules = true;
 948
 949         if (!IS_LOCAL(user))
 950                 return;
 951
 952         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 953         if (MOD_RESULT == 1)
 954                 call_modules = false;
 955
 956         if (MOD_RESULT != -1)
 957         {
 958                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 959                 {
 960                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 961                         return;
 962                 }
 963         }
 964
 965         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 966
 967         int numusers = 0;
 968         char* ptr = list + dlen;
 969
 970         if (!ulist)
 971                 ulist = this->GetUsers();
 972
 973         /* Improvement by Brain - this doesnt change in value, so why was it inside
 974          * the loop?
 975          */
 976         bool has_user = this->HasUser(user);
 977
 978         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 979         {
 980                 if ((!has_user) && (i->first->IsModeSet('i')))
 981                 {
 982                         /*
 983                          * user is +i, and source not on the channel, does not show
 984                          * nick in NAMES list
 985                          */
 986                         continue;
 987                 }
 988
 989                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 990                         continue;
 991
 992                 std::string prefixlist = this->GetPrefixChar(i->first);
 993                 std::string nick = i->first->nick;
 994
 995                 if (call_modules)
 996                 {
 997                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 998
 999                         /* Nick was nuked, a module wants us to skip it */
1000                         if (nick.empty())
1001                                 continue;
1002                 }
1003
1004                 size_t ptrlen = 0;
1005
1006                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
1007                 {
1008                         /* list overflowed into multiple numerics */
1009                         user->WriteNumeric(RPL_NAMREPLY, std::string(list));
1010
1011                         /* reset our lengths */
1012                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
1013                         ptr = list + dlen;
1014
1015                         ptrlen = 0;
1016                         numusers = 0;
1017                 }
1018
1019                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
1020
1021                 curlen += ptrlen;
1022                 ptr += ptrlen;
1023
1024                 numusers++;
1025         }
1026
1027         /* if whats left in the list isnt empty, send it */
1028         if (numusers)
1029         {
1030                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
1031         }
1032
1033         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
1034 }
1035
1036 long Channel::GetMaxBans()
1037 {
1038         /* Return the cached value if there is one */
1039         if (this->maxbans)
1040                 return this->maxbans;
1041
1042         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
1043         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
1044         {
1045                 if (InspIRCd::Match(this->name, n->first, NULL))
1046                 {
1047                         this->maxbans = n->second;
1048                         return n->second;
1049                 }
1050         }
1051
1052         /* Screw it, just return the default of 64 */
1053         this->maxbans = 64;
1054         return this->maxbans;
1055 }
1056
1057 void Channel::ResetMaxBans()
1058 {
1059         this->maxbans = 0;
1060 }
1061
1062 /* returns the status character for a given user on a channel, e.g. @ for op,
1063  * % for halfop etc. If the user has several modes set, the highest mode
1064  * the user has must be returned.
1065  */
1066 const char* Channel::GetPrefixChar(User *user)
1067 {
1068         static char pf[2] = {0, 0};
1069
1070         prefixlist::iterator n = prefixes.find(user);
1071         if (n != prefixes.end())
1072         {
1073                 if (n->second.size())
1074                 {
1075                         /* If the user has any prefixes, their highest prefix
1076                          * will always be at the head of the list, as the list is
1077                          * sorted in rank order highest first (see SetPrefix()
1078                          * for reasons why)
1079                          */
1080                         *pf = n->second.begin()->first;
1081                         return pf;
1082                 }
1083         }
1084
1085         *pf = 0;
1086         return pf;
1087 }
1088
1089
1090 const char* Channel::GetAllPrefixChars(User* user)
1091 {
1092         static char prefix[MAXBUF];
1093         int ctr = 0;
1094         *prefix = 0;
1095
1096         prefixlist::iterator n = prefixes.find(user);
1097         if (n != prefixes.end())
1098         {
1099                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1100                 {
1101                         prefix[ctr++] = x->first;
1102                 }
1103         }
1104
1105         prefix[ctr] = 0;
1106
1107         return prefix;
1108 }
1109
1110 unsigned int Channel::GetPrefixValue(User* user)
1111 {
1112         prefixlist::iterator n = prefixes.find(user);
1113         if (n != prefixes.end())
1114         {
1115                 if (n->second.size())
1116                         return n->second.begin()->second;
1117         }
1118         return 0;
1119 }
1120
1121 int Channel::GetStatusFlags(User *user)
1122 {
1123         UCListIter i = user->chans.find(this);
1124         if (i != user->chans.end())
1125         {
1126                 return i->second;
1127         }
1128         return 0;
1129 }
1130
1131 int Channel::GetStatus(User *user)
1132 {
1133         if (ServerInstance->ULine(user->server))
1134                 return STATUS_OP;
1135
1136         UCListIter i = user->chans.find(this);
1137         if (i != user->chans.end())
1138         {
1139                 if ((i->second & UCMODE_OP) > 0)
1140                 {
1141                         return STATUS_OP;
1142                 }
1143                 if ((i->second & UCMODE_HOP) > 0)
1144                 {
1145                         return STATUS_HOP;
1146                 }
1147                 if ((i->second & UCMODE_VOICE) > 0)
1148                 {
1149                         return STATUS_VOICE;
1150                 }
1151                 return STATUS_NORMAL;
1152         }
1153         return STATUS_NORMAL;
1154 }
1155
1156 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1157 {
1158         prefixlist::iterator n = prefixes.find(user);
1159         prefixtype pfx = std::make_pair(prefix,prefix_value);
1160         if (adding)
1161         {
1162                 if (n != prefixes.end())
1163                 {
1164                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1165                         {
1166                                 n->second.push_back(pfx);
1167                                 /* We must keep prefixes in rank order, largest first.
1168                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1169                                  * state, and secondly it turns out to be a benefit to us later.
1170                                  * See above in GetPrefix().
1171                                  */
1172                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1173                         }
1174                 }
1175                 else
1176                 {
1177                         pfxcontainer one;
1178                         one.push_back(pfx);
1179                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1180                 }
1181         }
1182         else
1183         {
1184                 if (n != prefixes.end())
1185                 {
1186                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1187                         if (x != n->second.end())
1188                                 n->second.erase(x);
1189                 }
1190         }
1191 }
1192
1193 void Channel::RemoveAllPrefixes(User* user)
1194 {
1195         prefixlist::iterator n = prefixes.find(user);
1196         if (n != prefixes.end())
1197         {
1198                 prefixes.erase(n);
1199         }
1200 }
1201