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