src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 <stdarg.h>
  18 #include "wildcard.h"
  19 #include "mode.h"
  20
  21 Channel::Channel(InspIRCd* Instance, const std::string &name, time_t ts) : ServerInstance(Instance)
  22 {
  23         (*(ServerInstance->chanlist))[name.c_str()] = this;
  24         strlcpy(this->name, name.c_str(), CHANMAX);
  25         this->created = ts ? ts : ServerInstance->Time(true);
  26         this->age = this->created;
  27
  28
  29
  30
  31         *topic = *setby = *key = 0;
  32         maxbans = topicset = limit = 0;
  33         memset(&modes,0,64);
  34 }
  35
  36 void Channel::SetMode(char mode,bool mode_on)
  37 {
  38         modes[mode-65] = mode_on;
  39         if (!mode_on)
  40                 this->SetModeParam(mode,"",false);
  41 }
  42
  43
  44 void Channel::SetModeParam(char mode,const char* parameter,bool mode_on)
  45 {
  46         CustomModeList::iterator n = custom_mode_params.find(mode);
  47
  48         if (mode_on)
  49         {
  50                 if (n == custom_mode_params.end())
  51                         custom_mode_params[mode] = strdup(parameter);
  52         }
  53         else
  54         {
  55                 if (n != custom_mode_params.end())
  56                 {
  57                         free(n->second);
  58                         custom_mode_params.erase(n);
  59                 }
  60         }
  61 }
  62
  63 bool Channel::IsModeSet(char mode)
  64 {
  65         return modes[mode-65];
  66 }
  67
  68 std::string Channel::GetModeParameter(char mode)
  69 {
  70         switch (mode)
  71         {
  72                 case 'k':
  73                         return this->key;
  74                 case 'l':
  75                         return ConvToStr(this->limit);
  76                 default:
  77                         CustomModeList::iterator n = custom_mode_params.find(mode);
  78                         if (n != custom_mode_params.end())
  79                                 return n->second;
  80                         return "";
  81                 break;
  82         }
  83 }
  84
  85 long Channel::GetUserCounter()
  86 {
  87         return (this->internal_userlist.size());
  88 }
  89
  90 void Channel::AddUser(User* user)
  91 {
  92         internal_userlist[user] = user->nick;
  93 }
  94
  95 unsigned long Channel::DelUser(User* user)
  96 {
  97         CUListIter a = internal_userlist.find(user);
  98
  99         if (a != internal_userlist.end())
 100         {
 101                 internal_userlist.erase(a);
 102                 /* And tidy any others... */
 103                 DelOppedUser(user);
 104                 DelHalfoppedUser(user);
 105                 DelVoicedUser(user);
 106         }
 107
 108         return internal_userlist.size();
 109 }
 110
 111 bool Channel::HasUser(User* user)
 112 {
 113         return (internal_userlist.find(user) != internal_userlist.end());
 114 }
 115
 116 void Channel::AddOppedUser(User* user)
 117 {
 118         internal_op_userlist[user] = user->nick;
 119 }
 120
 121 void Channel::DelOppedUser(User* user)
 122 {
 123         CUListIter a = internal_op_userlist.find(user);
 124         if (a != internal_op_userlist.end())
 125         {
 126                 internal_op_userlist.erase(a);
 127                 return;
 128         }
 129 }
 130
 131 void Channel::AddHalfoppedUser(User* user)
 132 {
 133         internal_halfop_userlist[user] = user->nick;
 134 }
 135
 136 void Channel::DelHalfoppedUser(User* user)
 137 {
 138         CUListIter a = internal_halfop_userlist.find(user);
 139
 140         if (a != internal_halfop_userlist.end())
 141         {
 142                 internal_halfop_userlist.erase(a);
 143         }
 144 }
 145
 146 void Channel::AddVoicedUser(User* user)
 147 {
 148         internal_voice_userlist[user] = user->nick;
 149 }
 150
 151 void Channel::DelVoicedUser(User* user)
 152 {
 153         CUListIter a = internal_voice_userlist.find(user);
 154
 155         if (a != internal_voice_userlist.end())
 156         {
 157                 internal_voice_userlist.erase(a);
 158         }
 159 }
 160
 161 CUList* Channel::GetUsers()
 162 {
 163         return &internal_userlist;
 164 }
 165
 166 CUList* Channel::GetOppedUsers()
 167 {
 168         return &internal_op_userlist;
 169 }
 170
 171 CUList* Channel::GetHalfoppedUsers()
 172 {
 173         return &internal_halfop_userlist;
 174 }
 175
 176 CUList* Channel::GetVoicedUsers()
 177 {
 178         return &internal_voice_userlist;
 179 }
 180
 181 void Channel::SetDefaultModes()
 182 {
 183         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 184         std::string modeseq;
 185         std::string parameter;
 186
 187         list.GetToken(modeseq);
 188
 189         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 190         {
 191                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 192                 if (mode)
 193                 {
 194                         if (mode->GetNumParams(true))
 195                                 list.GetToken(parameter);
 196                         else
 197                                 parameter.clear();
 198
 199                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 200                 }
 201         }
 202 }
 203
 204 /*
 205  * add a channel to a user, creating the record for it if needed and linking
 206  * it to the user record
 207  */
 208 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 209 {
 210         if (!user || !cn)
 211                 return NULL;
 212
 213         char cname[MAXBUF];
 214         int MOD_RESULT = 0;
 215         std::string privs;
 216         Channel *Ptr;
 217
 218         /*
 219          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 220          * We restrict local users to MaxChans channels.
 221          * We restrict local operators to OperMaxChans channels.
 222          * This is a lot more logical than how it was formerly. -- w00t
 223          */
 224         if (IS_LOCAL(user) && !override)
 225         {
 226                 if (user->GetMaxChans())
 227                 {
 228                         if (user->chans.size() >= user->GetMaxChans())
 229                         {
 230                                 user->WriteServ("405 %s %s :You are on too many channels",user->nick, cn);
 231                                 return NULL;
 232                         }
 233                 }
 234                 else
 235                 {
 236                         if (IS_OPER(user))
 237                         {
 238                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 239                                 {
 240                                         user->WriteServ("405 %s %s :You are on too many channels",user->nick, cn);
 241                                         return NULL;
 242                                 }
 243                         }
 244                         else
 245                         {
 246                                 if (user->chans.size() >= Instance->Config->MaxChans)
 247                                 {
 248                                         user->WriteServ("405 %s %s :You are on too many channels",user->nick, cn);
 249                                         return NULL;
 250                                 }
 251                         }
 252                 }
 253         }
 254
 255         strlcpy(cname, cn, CHANMAX);
 256         Ptr = Instance->FindChan(cname);
 257
 258         if (!Ptr)
 259         {
 260                 /*
 261                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 262                  */
 263                 if (!IS_LOCAL(user))
 264                 {
 265                         if (!TS)
 266                                 Instance->Log(DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick, cn);
 267                 }
 268                 else
 269                 {
 270                         privs = "@";
 271                 }
 272
 273                 if (IS_LOCAL(user) && override == false)
 274                 {
 275                         MOD_RESULT = 0;
 276                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname,privs));
 277                         if (MOD_RESULT == 1)
 278                                 return NULL;
 279                 }
 280
 281                 Ptr = new Channel(Instance, cname, TS);
 282         }
 283         else
 284         {
 285                 /* Already on the channel */
 286                 if (Ptr->HasUser(user))
 287                         return NULL;
 288
 289                 /*
 290                  * remote users are allowed us to bypass channel modes
 291                  * and bans (used by servers)
 292                  */
 293                 if (IS_LOCAL(user) && override == false)
 294                 {
 295                         MOD_RESULT = 0;
 296                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname,privs));
 297                         if (MOD_RESULT == 1)
 298                         {
 299                                 return NULL;
 300                         }
 301                         else if (MOD_RESULT == 0)
 302                         {
 303                                 if (*Ptr->key)
 304                                 {
 305                                         MOD_RESULT = 0;
 306                                         FOREACH_RESULT_I(Instance,I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 307                                         if (!MOD_RESULT)
 308                                         {
 309                                                 if ((!key) || strcmp(key,Ptr->key))
 310                                                 {
 311                                                         user->WriteServ("475 %s %s :Cannot join channel (Incorrect channel key)",user->nick, Ptr->name);
 312                                                         return NULL;
 313                                                 }
 314                                         }
 315                                 }
 316                                 if (Ptr->IsModeSet('i'))
 317                                 {
 318                                         MOD_RESULT = 0;
 319                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 320                                         if (!MOD_RESULT)
 321                                         {
 322                                                 if (!user->IsInvited(Ptr->name))
 323                                                 {
 324                                                         user->WriteServ("473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 325                                                         return NULL;
 326                                                 }
 327                                         }
 328                                         user->RemoveInvite(Ptr->name);
 329                                 }
 330                                 if (Ptr->limit)
 331                                 {
 332                                         MOD_RESULT = 0;
 333                                         FOREACH_RESULT_I(Instance,I_OnCheckLimit,OnCheckLimit(user, Ptr));
 334                                         if (!MOD_RESULT)
 335                                         {
 336                                                 if (Ptr->GetUserCounter() >= Ptr->limit)
 337                                                 {
 338                                                         user->WriteServ("471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 339                                                         return NULL;
 340                                                 }
 341                                         }
 342                                 }
 343                                 if (Ptr->bans.size())
 344                                 {
 345                                         if (Ptr->IsBanned(user))
 346                                         {
 347                                                 user->WriteServ("474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 348                                                 return NULL;
 349                                         }
 350                                 }
 351                         }
 352                 }
 353         }
 354
 355         /* As spotted by jilles, dont bother to set this on remote users */
 356         if (IS_LOCAL(user) && Ptr->GetUserCounter() == 1)
 357                 Ptr->SetDefaultModes();
 358
 359         return Channel::ForceChan(Instance, Ptr, user, privs, bursting);
 360 }
 361
 362 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting)
 363 {
 364         std::string nick = user->nick;
 365         bool silent = false;
 366
 367         Ptr->AddUser(user);
 368
 369         /* Just in case they have no permissions */
 370         user->chans[Ptr] = 0;
 371
 372         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 373         {
 374                 const char status = *x;
 375                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 376                 if (mh)
 377                 {
 378                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 379                         /* Make sure that the mode handler knows this mode was now set */
 380                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 381
 382                         switch (mh->GetPrefix())
 383                         {
 384                                 /* These logic ops are SAFE IN THIS CASE
 385                                  * because if the entry doesnt exist,
 386                                  * addressing operator[] creates it.
 387                                  * If they do exist, it points to it.
 388                                  * At all other times where we dont want
 389                                  * to create an item if it doesnt exist, we
 390                                  * must stick to ::find().
 391                                  */
 392                                 case '@':
 393                                         user->chans[Ptr] |= UCMODE_OP;
 394                                 break;
 395                                 case '%':
 396                                         user->chans[Ptr] |= UCMODE_HOP;
 397                                 break;
 398                                 case '+':
 399                                         user->chans[Ptr] |= UCMODE_VOICE;
 400                                 break;
 401                         }
 402                 }
 403         }
 404
 405         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 406
 407         if (!silent)
 408                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name);
 409
 410         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 411         std::string ms = Instance->Modes->ModeString(user, Ptr);
 412         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 413                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name, ms.c_str());
 414
 415         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 416         if (IS_LOCAL(user))
 417         {
 418                 if (Ptr->topicset)
 419                 {
 420                         user->WriteServ("332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 421                         user->WriteServ("333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 422                 }
 423                 Ptr->UserList(user);
 424         }
 425         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 426         return Ptr;
 427 }
 428
 429 bool Channel::IsBanned(User* user)
 430 {
 431         char mask[MAXBUF];
 432         int MOD_RESULT = 0;
 433         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 434         if (!MOD_RESULT)
 435         {
 436                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 437                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 438                 {
 439                         /* This allows CIDR ban matching
 440                          *
 441                          *        Full masked host                      Full unmasked host                   IP with/without CIDR
 442                          */
 443                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 444                         {
 445                                 return true;
 446                         }
 447                 }
 448         }
 449         return false;
 450 }
 451
 452 /* Channel::PartUser
 453  * remove a channel from a users record, and return the number of users left.
 454  * Therefore, if this function returns 0 the caller should delete the Channel.
 455  */
 456 long Channel::PartUser(User *user, const char* reason)
 457 {
 458         bool silent = false;
 459
 460         if (!user)
 461                 return this->GetUserCounter();
 462
 463         UCListIter i = user->chans.find(this);
 464         if (i != user->chans.end())
 465         {
 466                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason ? reason : "", silent));
 467
 468                 if (!silent)
 469                         this->WriteChannel(user, "PART %s%s%s", this->name, reason ? " :" : "", reason ? reason : "");
 470
 471                 user->chans.erase(i);
 472                 this->RemoveAllPrefixes(user);
 473         }
 474
 475         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 476         {
 477                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 478                 /* kill the record */
 479                 if (iter != ServerInstance->chanlist->end())
 480                 {
 481                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 482                         ServerInstance->chanlist->erase(iter);
 483                 }
 484                 return 0;
 485         }
 486
 487         return this->GetUserCounter();
 488 }
 489
 490 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents)
 491 {
 492         bool silent = false;
 493
 494         if (!user || !reason)
 495                 return this->GetUserCounter();
 496
 497         if (IS_LOCAL(user))
 498         {
 499                 if (!this->HasUser(user))
 500                 {
 501                         /* Not on channel */
 502                         return this->GetUserCounter();
 503                 }
 504         }
 505
 506         if (triggerevents)
 507         {
 508                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 509         }
 510
 511         UCListIter i = user->chans.find(this);
 512         if (i != user->chans.end())
 513         {
 514                 if (!silent)
 515                         this->WriteChannelWithServ(ServerInstance->Config->ServerName, "KICK %s %s :%s", this->name, user->nick, reason);
 516
 517                 user->chans.erase(i);
 518                 this->RemoveAllPrefixes(user);
 519         }
 520
 521         if (!this->DelUser(user))
 522         {
 523                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 524                 /* kill the record */
 525                 if (iter != ServerInstance->chanlist->end())
 526                 {
 527                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 528                         ServerInstance->chanlist->erase(iter);
 529                 }
 530                 return 0;
 531         }
 532
 533         return this->GetUserCounter();
 534 }
 535
 536 long Channel::KickUser(User *src, User *user, const char* reason)
 537 {
 538         bool silent = false;
 539
 540         if (!src || !user || !reason)
 541                 return this->GetUserCounter();
 542
 543         if (IS_LOCAL(src))
 544         {
 545                 if (!this->HasUser(user))
 546                 {
 547                         src->WriteServ("441 %s %s %s :They are not on that channel",src->nick, user->nick, this->name);
 548                         return this->GetUserCounter();
 549                 }
 550                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 551                 {
 552                         src->WriteServ("482 %s %s :Only a u-line may kick a u-line from a channel.",src->nick, this->name);
 553                         return this->GetUserCounter();
 554                 }
 555                 int MOD_RESULT = 0;
 556
 557                 if (!ServerInstance->ULine(src->server))
 558                 {
 559                         MOD_RESULT = 0;
 560                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 561                         if (MOD_RESULT == 1)
 562                                 return this->GetUserCounter();
 563                 }
 564                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 565                 if (MOD_RESULT != -1)
 566                 {
 567                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 568                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 569                                 return this->GetUserCounter();
 570
 571                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 572                         {
 573                                 int them = this->GetStatus(src);
 574                                 int us = this->GetStatus(user);
 575                                 if ((them < STATUS_HOP) || (them < us))
 576                                 {
 577                                         src->WriteServ("482 %s %s :You must be a channel %soperator",src->nick, this->name, them == STATUS_HOP ? "" : "half-");
 578                                         return this->GetUserCounter();
 579                                 }
 580                         }
 581                 }
 582         }
 583
 584         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 585
 586         UCListIter i = user->chans.find(this);
 587         if (i != user->chans.end())
 588         {
 589                 /* zap it from the channel list of the user */
 590                 if (!silent)
 591                         this->WriteChannel(src, "KICK %s %s :%s", this->name, user->nick, reason);
 592
 593                 user->chans.erase(i);
 594                 this->RemoveAllPrefixes(user);
 595         }
 596
 597         if (!this->DelUser(user))
 598         /* if there are no users left on the channel */
 599         {
 600                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 601
 602                 /* kill the record */
 603                 if (iter != ServerInstance->chanlist->end())
 604                 {
 605                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 606                         ServerInstance->chanlist->erase(iter);
 607                 }
 608                 return 0;
 609         }
 610
 611         return this->GetUserCounter();
 612 }
 613
 614 void Channel::WriteChannel(User* user, char* text, ...)
 615 {
 616         char textbuffer[MAXBUF];
 617         va_list argsPtr;
 618
 619         if (!user || !text)
 620                 return;
 621
 622         va_start(argsPtr, text);
 623         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 624         va_end(argsPtr);
 625
 626         this->WriteChannel(user, std::string(textbuffer));
 627 }
 628
 629 void Channel::WriteChannel(User* user, const std::string &text)
 630 {
 631         CUList *ulist = this->GetUsers();
 632         char tb[MAXBUF];
 633
 634         if (!user)
 635                 return;
 636
 637         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 638         std::string out = tb;
 639
 640         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 641         {
 642                 if (IS_LOCAL(i->first))
 643                         i->first->Write(out);
 644         }
 645 }
 646
 647 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 648 {
 649         char textbuffer[MAXBUF];
 650         va_list argsPtr;
 651
 652         if (!text)
 653                 return;
 654
 655         va_start(argsPtr, text);
 656         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 657         va_end(argsPtr);
 658
 659         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 660 }
 661
 662 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 663 {
 664         CUList *ulist = this->GetUsers();
 665         char tb[MAXBUF];
 666
 667         snprintf(tb,MAXBUF,":%s %s",ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 668         std::string out = tb;
 669
 670         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 671         {
 672                 if (IS_LOCAL(i->first))
 673                         i->first->Write(out);
 674         }
 675 }
 676
 677 /* write formatted text from a source user to all users on a channel except
 678  * for the sender (for privmsg etc) */
 679 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, char* text, ...)
 680 {
 681         char textbuffer[MAXBUF];
 682         va_list argsPtr;
 683
 684         if (!text)
 685                 return;
 686
 687         va_start(argsPtr, text);
 688         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 689         va_end(argsPtr);
 690
 691         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 692 }
 693
 694 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, char* text, ...)
 695 {
 696         char textbuffer[MAXBUF];
 697         va_list argsPtr;
 698
 699         if (!text)
 700                 return;
 701
 702         va_start(argsPtr, text);
 703         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 704         va_end(argsPtr);
 705
 706         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 707 }
 708
 709 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 710 {
 711         CUList *ulist;
 712         char tb[MAXBUF];
 713
 714         switch (status)
 715         {
 716                 case '@':
 717                         ulist = this->GetOppedUsers();
 718                         break;
 719                 case '%':
 720                         ulist = this->GetHalfoppedUsers();
 721                         break;
 722                 case '+':
 723                         ulist = this->GetVoicedUsers();
 724                         break;
 725                 default:
 726                         ulist = this->GetUsers();
 727                         break;
 728         }
 729
 730         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 731         std::string out = tb;
 732
 733         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 734         {
 735                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 736                 {
 737                         if (serversource)
 738                                 i->first->WriteServ(text);
 739                         else
 740                                 i->first->Write(out);
 741                 }
 742         }
 743 }
 744
 745 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 746 {
 747         CUList except_list;
 748         except_list[user] = user->nick;
 749         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 750 }
 751
 752 /*
 753  * return a count of the users on a specific channel accounting for
 754  * invisible users who won't increase the count. e.g. for /LIST
 755  */
 756 int Channel::CountInvisible()
 757 {
 758         int count = 0;
 759         CUList *ulist= this->GetUsers();
 760         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 761         {
 762                 if (!(i->first->IsModeSet('i')))
 763                         count++;
 764         }
 765
 766         return count;
 767 }
 768
 769 char* Channel::ChanModes(bool showkey)
 770 {
 771         static char scratch[MAXBUF];
 772         static char sparam[MAXBUF];
 773         char* offset = scratch;
 774         std::string extparam;
 775
 776         *scratch = '\0';
 777         *sparam = '\0';
 778
 779         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 780         for(int n = 0; n < 64; n++)
 781         {
 782                 if(this->modes[n])
 783                 {
 784                         *offset++ = n + 65;
 785                         extparam.clear();
 786                         switch (n)
 787                         {
 788                                 case CM_KEY:
 789                                         extparam = (showkey ? this->key : "<key>");
 790                                 break;
 791                                 case CM_LIMIT:
 792                                         extparam = ConvToStr(this->limit);
 793                                 break;
 794                                 case CM_NOEXTERNAL:
 795                                 case CM_TOPICLOCK:
 796                                 case CM_INVITEONLY:
 797                                 case CM_MODERATED:
 798                                 case CM_SECRET:
 799                                 case CM_PRIVATE:
 800                                         /* We know these have no parameters */
 801                                 break;
 802                                 default:
 803                                         extparam = this->GetModeParameter(n + 65);
 804                                 break;
 805                         }
 806                         if (!extparam.empty())
 807                         {
 808                                 charlcat(sparam,' ',MAXBUF);
 809                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 810                         }
 811                 }
 812         }
 813
 814         /* Null terminate scratch */
 815         *offset = '\0';
 816         strlcat(scratch,sparam,MAXBUF);
 817         return scratch;
 818 }
 819
 820 /* compile a userlist of a channel into a string, each nick seperated by
 821  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 822  */
 823 void Channel::UserList(User *user, CUList *ulist)
 824 {
 825         char list[MAXBUF];
 826         size_t dlen, curlen;
 827         int MOD_RESULT = 0;
 828
 829         if (!IS_LOCAL(user))
 830                 return;
 831
 832         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 833         if (MOD_RESULT == 1)
 834                 return;
 835         if (MOD_RESULT != -1)
 836         {
 837                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 838                 {
 839                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, this->name);
 840                         return;
 841                 }
 842         }
 843
 844         dlen = curlen = snprintf(list,MAXBUF,"353 %s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name);
 845
 846         int numusers = 0;
 847         char* ptr = list + dlen;
 848
 849         if (!ulist)
 850                 ulist = this->GetUsers();
 851
 852         /* Improvement by Brain - this doesnt change in value, so why was it inside
 853          * the loop?
 854          */
 855         bool has_user = this->HasUser(user);
 856
 857         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 858         {
 859                 if ((!has_user) && (i->first->IsModeSet('i')))
 860                 {
 861                         /*
 862                          * user is +i, and source not on the channel, does not show
 863                          * nick in NAMES list
 864                          */
 865                         continue;
 866                 }
 867
 868                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 869                         continue;
 870
 871                 size_t ptrlen = snprintf(ptr, MAXBUF, "%s%s ", this->GetPrefixChar(i->first), i->second.c_str());
 872                 /* OnUserList can change this - reset it back to normal */
 873                 i->second = i->first->nick;
 874
 875                 curlen += ptrlen;
 876                 ptr += ptrlen;
 877
 878                 numusers++;
 879
 880                 if (curlen > (480-NICKMAX))
 881                 {
 882                         /* list overflowed into multiple numerics */
 883                         user->WriteServ(std::string(list));
 884
 885                         /* reset our lengths */
 886                         dlen = curlen = snprintf(list,MAXBUF,"353 %s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name);
 887                         ptr = list + dlen;
 888
 889                         ptrlen = 0;
 890                         numusers = 0;
 891                 }
 892         }
 893
 894         /* if whats left in the list isnt empty, send it */
 895         if (numusers)
 896         {
 897                 user->WriteServ(std::string(list));
 898         }
 899
 900         user->WriteServ("366 %s %s :End of /NAMES list.", user->nick, this->name);
 901 }
 902
 903 long Channel::GetMaxBans()
 904 {
 905         /* Return the cached value if there is one */
 906         if (this->maxbans)
 907                 return this->maxbans;
 908
 909         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 910         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 911         {
 912                 if (match(this->name,n->first.c_str()))
 913                 {
 914                         this->maxbans = n->second;
 915                         return n->second;
 916                 }
 917         }
 918
 919         /* Screw it, just return the default of 64 */
 920         this->maxbans = 64;
 921         return this->maxbans;
 922 }
 923
 924 void Channel::ResetMaxBans()
 925 {
 926         this->maxbans = 0;
 927 }
 928
 929 /* returns the status character for a given user on a channel, e.g. @ for op,
 930  * % for halfop etc. If the user has several modes set, the highest mode
 931  * the user has must be returned.
 932  */
 933 const char* Channel::GetPrefixChar(User *user)
 934 {
 935         static char pf[2] = {0, 0};
 936
 937         prefixlist::iterator n = prefixes.find(user);
 938         if (n != prefixes.end())
 939         {
 940                 if (n->second.size())
 941                 {
 942                         /* If the user has any prefixes, their highest prefix
 943                          * will always be at the head of the list, as the list is
 944                          * sorted in rank order highest first (see SetPrefix()
 945                          * for reasons why)
 946                          */
 947                         *pf = n->second.begin()->first;
 948                         return pf;
 949                 }
 950         }
 951
 952         *pf = 0;
 953         return pf;
 954 }
 955
 956 const char* Channel::GetAllPrefixChars(User* user)
 957 {
 958         static char prefix[MAXBUF];
 959         int ctr = 0;
 960         *prefix = 0;
 961
 962         prefixlist::iterator n = prefixes.find(user);
 963         if (n != prefixes.end())
 964         {
 965                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
 966                 {
 967                         prefix[ctr++] = x->first;
 968                 }
 969         }
 970
 971         prefix[ctr] = 0;
 972
 973         return prefix;
 974 }
 975
 976 unsigned int Channel::GetPrefixValue(User* user)
 977 {
 978         prefixlist::iterator n = prefixes.find(user);
 979         if (n != prefixes.end())
 980         {
 981                 if (n->second.size())
 982                         return n->second.begin()->second;
 983         }
 984         return 0;
 985 }
 986
 987 int Channel::GetStatusFlags(User *user)
 988 {
 989         UCListIter i = user->chans.find(this);
 990         if (i != user->chans.end())
 991         {
 992                 return i->second;
 993         }
 994         return 0;
 995 }
 996
 997 int Channel::GetStatus(User *user)
 998 {
 999         if (ServerInstance->ULine(user->server))
1000                 return STATUS_OP;
1001
1002         UCListIter i = user->chans.find(this);
1003         if (i != user->chans.end())
1004         {
1005                 if ((i->second & UCMODE_OP) > 0)
1006                 {
1007                         return STATUS_OP;
1008                 }
1009                 if ((i->second & UCMODE_HOP) > 0)
1010                 {
1011                         return STATUS_HOP;
1012                 }
1013                 if ((i->second & UCMODE_VOICE) > 0)
1014                 {
1015                         return STATUS_VOICE;
1016                 }
1017                 return STATUS_NORMAL;
1018         }
1019         return STATUS_NORMAL;
1020 }
1021
1022 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1023 {
1024         prefixlist::iterator n = prefixes.find(user);
1025         prefixtype pfx = std::make_pair(prefix,prefix_value);
1026         if (adding)
1027         {
1028                 if (n != prefixes.end())
1029                 {
1030                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1031                         {
1032                                 n->second.push_back(pfx);
1033                                 /* We must keep prefixes in rank order, largest first.
1034                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1035                                  * state, and secondly it turns out to be a benefit to us later.
1036                                  * See above in GetPrefix().
1037                                  */
1038                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1039                         }
1040                 }
1041                 else
1042                 {
1043                         pfxcontainer one;
1044                         one.push_back(pfx);
1045                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1046                 }
1047         }
1048         else
1049         {
1050                 if (n != prefixes.end())
1051                 {
1052                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1053                         if (x != n->second.end())
1054                                 n->second.erase(x);
1055                 }
1056         }
1057 }
1058
1059 void Channel::RemoveAllPrefixes(User* user)
1060 {
1061         prefixlist::iterator n = prefixes.find(user);
1062         if (n != prefixes.end())
1063         {
1064                 prefixes.erase(n);
1065         }
1066 }
1067