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 &cname, time_t ts) : ServerInstance(Instance)
  22 {
  23         chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
  24         if (findchan != Instance->chanlist->end())
  25                 throw CoreException("Cannot create duplicate channel " + cname);
  26
  27         (*(ServerInstance->chanlist))[cname.c_str()] = this;
  28         strlcpy(this->name, cname.c_str(), CHANMAX);
  29         this->created = ts ? ts : ServerInstance->Time();
  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->WriteNumeric(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->WriteNumeric(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->WriteNumeric(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->Logs->Log("CHANNEL",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->WriteNumeric(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->WriteNumeric(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->WriteNumeric(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->WriteNumeric(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                         /* Set, and make sure that the mode handler knows this mode was now set */
 383                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 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 because if the entry doesnt exist,
 389                                  * addressing operator[] creates it. If they do exist, it points to it.
 390                                  * At all other times where we dont want to create an item if it doesnt exist, we
 391                                  * must stick to ::find().
 392                                  */
 393                                 case '@':
 394                                         user->chans[Ptr] |= UCMODE_OP;
 395                                 break;
 396                                 case '%':
 397                                         user->chans[Ptr] |= UCMODE_HOP;
 398                                 break;
 399                                 case '+':
 400                                         user->chans[Ptr] |= UCMODE_VOICE;
 401                                 break;
 402                         }
 403                 }
 404         }
 405
 406         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 407
 408         if (!silent)
 409                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name);
 410
 411         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 412         std::string ms = Instance->Modes->ModeString(user, Ptr);
 413         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 414                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name, ms.c_str());
 415
 416         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 417         if (IS_LOCAL(user))
 418         {
 419                 if (Ptr->topicset)
 420                 {
 421                         user->WriteNumeric(332, "%s %s :%s", user->nick, Ptr->name, Ptr->topic);
 422                         user->WriteNumeric(333, "%s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 423                 }
 424                 Ptr->UserList(user);
 425         }
 426         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 427         return Ptr;
 428 }
 429
 430 bool Channel::IsBanned(User* user)
 431 {
 432         char mask[MAXBUF];
 433         int MOD_RESULT = 0;
 434         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 435         if (!MOD_RESULT)
 436         {
 437                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 438                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 439                 {
 440                         /* This allows CIDR ban matching
 441                          *
 442                          *        Full masked host                      Full unmasked host                   IP with/without CIDR
 443                          */
 444                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 445                         {
 446                                 return true;
 447                         }
 448                 }
 449         }
 450         return false;
 451 }
 452
 453 bool Channel::IsExtBanned(User *user, char type)
 454 {
 455         // XXX. do we need events?
 456         char mask[MAXBUF];
 457         char *maskptr;
 458
 459         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 460
 461         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 462         {
 463                 if (i->data[0] != type || i->data[1] != ':')
 464                         continue;
 465
 466                 // Iterate past char and : to get to the mask without doing a data copy(!)
 467                 maskptr = i->data;
 468                 maskptr++; // past the char
 469                 maskptr++; // past the :
 470
 471                 /* This allows CIDR ban matching
 472                  *
 473                  *        Full masked host                             Full unmasked host                     IP with/without CIDR
 474                  */
 475                 if ((match(user->GetFullHost(), maskptr)) || (match(user->GetFullRealHost(), maskptr)) || (match(mask, maskptr, true)))
 476                 {
 477                         return true;
 478                 }
 479         }
 480
 481         return false;
 482 }
 483
 484 /* Channel::PartUser
 485  * remove a channel from a users record, and return the number of users left.
 486  * Therefore, if this function returns 0 the caller should delete the Channel.
 487  */
 488 long Channel::PartUser(User *user, const char* reason)
 489 {
 490         bool silent = false;
 491
 492         if (!user)
 493                 return this->GetUserCounter();
 494
 495         UCListIter i = user->chans.find(this);
 496         if (i != user->chans.end())
 497         {
 498                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason ? reason : "", silent));
 499
 500                 if (!silent)
 501                         this->WriteChannel(user, "PART %s%s%s", this->name, reason ? " :" : "", reason ? reason : "");
 502
 503                 user->chans.erase(i);
 504                 this->RemoveAllPrefixes(user);
 505         }
 506
 507         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 508         {
 509                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 510                 /* kill the record */
 511                 if (iter != ServerInstance->chanlist->end())
 512                 {
 513                         int MOD_RESULT = 0;
 514                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 515                         if (MOD_RESULT == 1)
 516                                 return 1; // delete halted by module
 517                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 518                         ServerInstance->chanlist->erase(iter);
 519                 }
 520                 return 0;
 521         }
 522
 523         return this->GetUserCounter();
 524 }
 525
 526 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 527 {
 528         bool silent = false;
 529
 530         if (!user || !reason)
 531                 return this->GetUserCounter();
 532
 533         if (IS_LOCAL(user))
 534         {
 535                 if (!this->HasUser(user))
 536                 {
 537                         /* Not on channel */
 538                         return this->GetUserCounter();
 539                 }
 540         }
 541
 542         if (servername == NULL)
 543                 servername = ServerInstance->Config->ServerName;
 544
 545         if (triggerevents)
 546         {
 547                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 548         }
 549
 550         UCListIter i = user->chans.find(this);
 551         if (i != user->chans.end())
 552         {
 553                 if (!silent)
 554                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name, user->nick, reason);
 555
 556                 user->chans.erase(i);
 557                 this->RemoveAllPrefixes(user);
 558         }
 559
 560         if (!this->DelUser(user))
 561         {
 562                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 563                 /* kill the record */
 564                 if (iter != ServerInstance->chanlist->end())
 565                 {
 566                         int MOD_RESULT = 0;
 567                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 568                         if (MOD_RESULT == 1)
 569                                 return 1; // delete halted by module
 570                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 571                         ServerInstance->chanlist->erase(iter);
 572                 }
 573                 return 0;
 574         }
 575
 576         return this->GetUserCounter();
 577 }
 578
 579 long Channel::KickUser(User *src, User *user, const char* reason)
 580 {
 581         bool silent = false;
 582
 583         if (!src || !user || !reason)
 584                 return this->GetUserCounter();
 585
 586         if (IS_LOCAL(src))
 587         {
 588                 if (!this->HasUser(user))
 589                 {
 590                         src->WriteNumeric(441, "%s %s %s :They are not on that channel",src->nick, user->nick, this->name);
 591                         return this->GetUserCounter();
 592                 }
 593                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 594                 {
 595                         src->WriteNumeric(482, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick, this->name);
 596                         return this->GetUserCounter();
 597                 }
 598                 int MOD_RESULT = 0;
 599
 600                 if (!ServerInstance->ULine(src->server))
 601                 {
 602                         MOD_RESULT = 0;
 603                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 604                         if (MOD_RESULT == 1)
 605                                 return this->GetUserCounter();
 606                 }
 607                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 608                 if (MOD_RESULT != -1)
 609                 {
 610                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 611                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 612                                 return this->GetUserCounter();
 613
 614                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 615                         {
 616                                 int them = this->GetStatus(src);
 617                                 int us = this->GetStatus(user);
 618                                 if ((them < STATUS_HOP) || (them < us))
 619                                 {
 620                                         src->WriteNumeric(482, "%s %s :You must be a channel %soperator",src->nick, this->name, them == STATUS_HOP ? "" : "half-");
 621                                         return this->GetUserCounter();
 622                                 }
 623                         }
 624                 }
 625         }
 626
 627         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 628
 629         UCListIter i = user->chans.find(this);
 630         if (i != user->chans.end())
 631         {
 632                 /* zap it from the channel list of the user */
 633                 if (!silent)
 634                         this->WriteChannel(src, "KICK %s %s :%s", this->name, user->nick, reason);
 635
 636                 user->chans.erase(i);
 637                 this->RemoveAllPrefixes(user);
 638         }
 639
 640         if (!this->DelUser(user))
 641         /* if there are no users left on the channel */
 642         {
 643                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 644
 645                 /* kill the record */
 646                 if (iter != ServerInstance->chanlist->end())
 647                 {
 648                         int MOD_RESULT = 0;
 649                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 650                         if (MOD_RESULT == 1)
 651                                 return 1; // delete halted by module
 652                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 653                         ServerInstance->chanlist->erase(iter);
 654                 }
 655                 return 0;
 656         }
 657
 658         return this->GetUserCounter();
 659 }
 660
 661 void Channel::WriteChannel(User* user, const char* text, ...)
 662 {
 663         char textbuffer[MAXBUF];
 664         va_list argsPtr;
 665
 666         if (!user || !text)
 667                 return;
 668
 669         va_start(argsPtr, text);
 670         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 671         va_end(argsPtr);
 672
 673         this->WriteChannel(user, std::string(textbuffer));
 674 }
 675
 676 void Channel::WriteChannel(User* user, const std::string &text)
 677 {
 678         CUList *ulist = this->GetUsers();
 679         char tb[MAXBUF];
 680
 681         if (!user)
 682                 return;
 683
 684         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),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 void Channel::WriteChannelWithServ(const char* ServName, const 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->WriteChannelWithServ(ServName, std::string(textbuffer));
 707 }
 708
 709 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 710 {
 711         CUList *ulist = this->GetUsers();
 712         char tb[MAXBUF];
 713
 714         snprintf(tb,MAXBUF,":%s %s",ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 715         std::string out = tb;
 716
 717         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 718         {
 719                 if (IS_LOCAL(i->first))
 720                         i->first->Write(out);
 721         }
 722 }
 723
 724 /* write formatted text from a source user to all users on a channel except
 725  * for the sender (for privmsg etc) */
 726 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 727 {
 728         char textbuffer[MAXBUF];
 729         va_list argsPtr;
 730
 731         if (!text)
 732                 return;
 733
 734         va_start(argsPtr, text);
 735         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 736         va_end(argsPtr);
 737
 738         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 739 }
 740
 741 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 742 {
 743         char textbuffer[MAXBUF];
 744         va_list argsPtr;
 745
 746         if (!text)
 747                 return;
 748
 749         va_start(argsPtr, text);
 750         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 751         va_end(argsPtr);
 752
 753         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 754 }
 755
 756 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 757 {
 758         CUList *ulist = this->GetUsers();
 759         char tb[MAXBUF];
 760
 761         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 762         std::string out = tb;
 763
 764         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 765         {
 766                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 767                 {
 768                         /* User doesnt have the status we're after */
 769                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 770                                 continue;
 771
 772                         if (serversource)
 773                                 i->first->WriteServ(text);
 774                         else
 775                                 i->first->Write(out);
 776                 }
 777         }
 778 }
 779
 780 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 781 {
 782         CUList except_list;
 783         except_list[user] = user->nick;
 784         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 785 }
 786
 787 /*
 788  * return a count of the users on a specific channel accounting for
 789  * invisible users who won't increase the count. e.g. for /LIST
 790  */
 791 int Channel::CountInvisible()
 792 {
 793         int count = 0;
 794         CUList *ulist= this->GetUsers();
 795         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 796         {
 797                 if (!(i->first->IsModeSet('i')))
 798                         count++;
 799         }
 800
 801         return count;
 802 }
 803
 804 char* Channel::ChanModes(bool showkey)
 805 {
 806         static char scratch[MAXBUF];
 807         static char sparam[MAXBUF];
 808         char* offset = scratch;
 809         std::string extparam;
 810
 811         *scratch = '\0';
 812         *sparam = '\0';
 813
 814         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 815         for(int n = 0; n < 64; n++)
 816         {
 817                 if(this->modes[n])
 818                 {
 819                         *offset++ = n + 65;
 820                         extparam.clear();
 821                         switch (n)
 822                         {
 823                                 case CM_KEY:
 824                                         extparam = (showkey ? this->key : "<key>");
 825                                 break;
 826                                 case CM_LIMIT:
 827                                         extparam = ConvToStr(this->limit);
 828                                 break;
 829                                 case CM_NOEXTERNAL:
 830                                 case CM_TOPICLOCK:
 831                                 case CM_INVITEONLY:
 832                                 case CM_MODERATED:
 833                                 case CM_SECRET:
 834                                 case CM_PRIVATE:
 835                                         /* We know these have no parameters */
 836                                 break;
 837                                 default:
 838                                         extparam = this->GetModeParameter(n + 65);
 839                                 break;
 840                         }
 841                         if (!extparam.empty())
 842                         {
 843                                 charlcat(sparam,' ',MAXBUF);
 844                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 845                         }
 846                 }
 847         }
 848
 849         /* Null terminate scratch */
 850         *offset = '\0';
 851         strlcat(scratch,sparam,MAXBUF);
 852         return scratch;
 853 }
 854
 855 /* compile a userlist of a channel into a string, each nick seperated by
 856  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 857  */
 858 void Channel::UserList(User *user, CUList *ulist)
 859 {
 860         char list[MAXBUF];
 861         size_t dlen, curlen;
 862         int MOD_RESULT = 0;
 863         bool call_modules = true;
 864
 865         if (!IS_LOCAL(user))
 866                 return;
 867
 868         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 869         if (MOD_RESULT == 1)
 870                 call_modules = false;
 871
 872         if (MOD_RESULT != -1)
 873         {
 874                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 875                 {
 876                         user->WriteNumeric(401, "%s %s :No such nick/channel",user->nick, this->name);
 877                         return;
 878                 }
 879         }
 880
 881         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name);
 882
 883         int numusers = 0;
 884         char* ptr = list + dlen;
 885
 886         if (!ulist)
 887                 ulist = this->GetUsers();
 888
 889         /* Improvement by Brain - this doesnt change in value, so why was it inside
 890          * the loop?
 891          */
 892         bool has_user = this->HasUser(user);
 893
 894         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 895         {
 896                 if ((!has_user) && (i->first->IsModeSet('i')))
 897                 {
 898                         /*
 899                          * user is +i, and source not on the channel, does not show
 900                          * nick in NAMES list
 901                          */
 902                         continue;
 903                 }
 904
 905                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 906                         continue;
 907
 908                 std::string prefixlist = this->GetPrefixChar(i->first);
 909                 std::string nick = i->first->nick;
 910
 911                 if (call_modules)
 912                 {
 913                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 914
 915                         /* Nick was nuked, a module wants us to skip it */
 916                         if (nick.empty())
 917                                 continue;
 918                 }
 919
 920                 size_t ptrlen = 0;
 921
 922                 if (curlen > (480-NICKMAX))
 923                 {
 924                         /* list overflowed into multiple numerics */
 925                         user->WriteServ(std::string(list));
 926
 927                         /* reset our lengths */
 928                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name);
 929                         ptr = list + dlen;
 930
 931                         ptrlen = 0;
 932                         numusers = 0;
 933                 }
 934
 935                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 936
 937                 curlen += ptrlen;
 938                 ptr += ptrlen;
 939
 940                 numusers++;
 941         }
 942
 943         /* if whats left in the list isnt empty, send it */
 944         if (numusers)
 945         {
 946                 user->WriteNumeric(353,std::string(list));
 947         }
 948
 949         user->WriteNumeric(366, "%s %s :End of /NAMES list.", user->nick, this->name);
 950 }
 951
 952 long Channel::GetMaxBans()
 953 {
 954         /* Return the cached value if there is one */
 955         if (this->maxbans)
 956                 return this->maxbans;
 957
 958         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 959         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 960         {
 961                 if (match(this->name,n->first.c_str()))
 962                 {
 963                         this->maxbans = n->second;
 964                         return n->second;
 965                 }
 966         }
 967
 968         /* Screw it, just return the default of 64 */
 969         this->maxbans = 64;
 970         return this->maxbans;
 971 }
 972
 973 void Channel::ResetMaxBans()
 974 {
 975         this->maxbans = 0;
 976 }
 977
 978 /* returns the status character for a given user on a channel, e.g. @ for op,
 979  * % for halfop etc. If the user has several modes set, the highest mode
 980  * the user has must be returned.
 981  */
 982 const char* Channel::GetPrefixChar(User *user)
 983 {
 984         static char pf[2] = {0, 0};
 985
 986         prefixlist::iterator n = prefixes.find(user);
 987         if (n != prefixes.end())
 988         {
 989                 if (n->second.size())
 990                 {
 991                         /* If the user has any prefixes, their highest prefix
 992                          * will always be at the head of the list, as the list is
 993                          * sorted in rank order highest first (see SetPrefix()
 994                          * for reasons why)
 995                          */
 996                         *pf = n->second.begin()->first;
 997                         return pf;
 998                 }
 999         }
1000
1001         *pf = 0;
1002         return pf;
1003 }
1004
1005
1006 const char* Channel::GetAllPrefixChars(User* user)
1007 {
1008         static char prefix[MAXBUF];
1009         int ctr = 0;
1010         *prefix = 0;
1011
1012         prefixlist::iterator n = prefixes.find(user);
1013         if (n != prefixes.end())
1014         {
1015                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1016                 {
1017                         prefix[ctr++] = x->first;
1018                 }
1019         }
1020
1021         prefix[ctr] = 0;
1022
1023         return prefix;
1024 }
1025
1026 unsigned int Channel::GetPrefixValue(User* user)
1027 {
1028         prefixlist::iterator n = prefixes.find(user);
1029         if (n != prefixes.end())
1030         {
1031                 if (n->second.size())
1032                         return n->second.begin()->second;
1033         }
1034         return 0;
1035 }
1036
1037 int Channel::GetStatusFlags(User *user)
1038 {
1039         UCListIter i = user->chans.find(this);
1040         if (i != user->chans.end())
1041         {
1042                 return i->second;
1043         }
1044         return 0;
1045 }
1046
1047 int Channel::GetStatus(User *user)
1048 {
1049         if (ServerInstance->ULine(user->server))
1050                 return STATUS_OP;
1051
1052         UCListIter i = user->chans.find(this);
1053         if (i != user->chans.end())
1054         {
1055                 if ((i->second & UCMODE_OP) > 0)
1056                 {
1057                         return STATUS_OP;
1058                 }
1059                 if ((i->second & UCMODE_HOP) > 0)
1060                 {
1061                         return STATUS_HOP;
1062                 }
1063                 if ((i->second & UCMODE_VOICE) > 0)
1064                 {
1065                         return STATUS_VOICE;
1066                 }
1067                 return STATUS_NORMAL;
1068         }
1069         return STATUS_NORMAL;
1070 }
1071
1072 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1073 {
1074         prefixlist::iterator n = prefixes.find(user);
1075         prefixtype pfx = std::make_pair(prefix,prefix_value);
1076         if (adding)
1077         {
1078                 if (n != prefixes.end())
1079                 {
1080                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1081                         {
1082                                 n->second.push_back(pfx);
1083                                 /* We must keep prefixes in rank order, largest first.
1084                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1085                                  * state, and secondly it turns out to be a benefit to us later.
1086                                  * See above in GetPrefix().
1087                                  */
1088                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1089                         }
1090                 }
1091                 else
1092                 {
1093                         pfxcontainer one;
1094                         one.push_back(pfx);
1095                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1096                 }
1097         }
1098         else
1099         {
1100                 if (n != prefixes.end())
1101                 {
1102                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1103                         if (x != n->second.end())
1104                                 n->second.erase(x);
1105                 }
1106         }
1107 }
1108
1109 void Channel::RemoveAllPrefixes(User* user)
1110 {
1111         prefixlist::iterator n = prefixes.find(user);
1112         if (n != prefixes.end())
1113         {
1114                 prefixes.erase(n);
1115         }
1116 }
1117