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