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