src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include <cstdarg>
  18 #include "mode.h"
  19
  20 Channel::Channel(InspIRCd* Instance, const std::string &cname, time_t ts) : ServerInstance(Instance)
  21 {
  22         chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
  23         if (findchan != Instance->chanlist->end())
  24                 throw CoreException("Cannot create duplicate channel " + cname);
  25
  26         (*(ServerInstance->chanlist))[cname.c_str()] = this;
  27         this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
  28         this->age = ts ? ts : ServerInstance->Time();
  29
  30         maxbans = topicset = 0;
  31         modes.reset();
  32 }
  33
  34 void Channel::SetMode(char mode,bool mode_on)
  35 {
  36         modes[mode-65] = mode_on;
  37 }
  38
  39 void Channel::SetModeParam(char mode, std::string parameter)
  40 {
  41         CustomModeList::iterator n = custom_mode_params.find(mode);
  42         // always erase, even if changing, so that the map gets the new value
  43         if (n != custom_mode_params.end())
  44                 custom_mode_params.erase(n);
  45         if (parameter.empty())
  46         {
  47                 modes[mode-65] = false;
  48         }
  49         else
  50         {
  51                 custom_mode_params[mode] = parameter;
  52                 modes[mode-65] = true;
  53         }
  54 }
  55
  56 std::string Channel::GetModeParameter(char mode)
  57 {
  58         CustomModeList::iterator n = custom_mode_params.find(mode);
  59         if (n != custom_mode_params.end())
  60                 return n->second;
  61         return "";
  62 }
  63
  64 int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
  65 {
  66         if (u)
  67         {
  68                 if(!forceset)
  69                 {
  70                         ModResult res;
  71                         /* 0: check status, 1: don't, -1: disallow change silently */
  72
  73                         FIRST_MOD_RESULT(ServerInstance, OnPreTopicChange, res, (u,this,ntopic));
  74
  75                         if (res == MOD_RES_DENY)
  76                                 return CMD_FAILURE;
  77                         if (res != MOD_RES_ALLOW)
  78                         {
  79                                 if (!this->HasUser(u))
  80                                 {
  81                                         u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
  82                                         return CMD_FAILURE;
  83                                 }
  84                                 if ((this->IsModeSet('t')) && (this->GetPrefixValue(u) < HALFOP_VALUE))
  85                                 {
  86                                         u->WriteNumeric(482, "%s %s :You must be at least a half-operator to change the topic on this channel", u->nick.c_str(), this->name.c_str());
  87                                         return CMD_FAILURE;
  88                                 }
  89                         }
  90                 }
  91         }
  92
  93         this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
  94         if (u)
  95         {
  96                 this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
  97                 this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
  98         }
  99         else
 100         {
 101                 this->setby.assign(ServerInstance->Config->ServerName);
 102                 this->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 103         }
 104
 105         this->topicset = ServerInstance->Time();
 106
 107         // XXX: this check for 'u' is probably pre-fake-user, and it fucking sucks anyway. we need to change this.
 108         if (u)
 109         {
 110                 FOREACH_MOD(I_OnPostTopicChange,OnPostTopicChange(u, this, this->topic));
 111         }
 112
 113         return CMD_SUCCESS;
 114 }
 115
 116 long Channel::GetUserCounter()
 117 {
 118         return userlist.size();
 119 }
 120
 121 Membership* Channel::AddUser(User* user)
 122 {
 123         Membership* memb = new Membership(user, this);
 124         userlist[user] = memb;
 125         return memb;
 126 }
 127
 128 unsigned long Channel::DelUser(User* user)
 129 {
 130         UserMembIter a = userlist.find(user);
 131
 132         if (a != userlist.end())
 133         {
 134                 delete a->second;
 135                 userlist.erase(a);
 136         }
 137
 138         return userlist.size();
 139 }
 140
 141 bool Channel::HasUser(User* user)
 142 {
 143         return (userlist.find(user) != userlist.end());
 144 }
 145
 146 Membership* Channel::GetUser(User* user)
 147 {
 148         UserMembIter i = userlist.find(user);
 149         if (i == userlist.end())
 150                 return NULL;
 151         return i->second;
 152 }
 153
 154 const UserMembList* Channel::GetUsers()
 155 {
 156         return &userlist;
 157 }
 158
 159 void Channel::SetDefaultModes()
 160 {
 161         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 162         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 163         std::string modeseq;
 164         std::string parameter;
 165
 166         list.GetToken(modeseq);
 167
 168         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 169         {
 170                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 171                 if (mode)
 172                 {
 173                         if (mode->GetNumParams(true))
 174                                 list.GetToken(parameter);
 175                         else
 176                                 parameter.clear();
 177
 178                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 179                 }
 180         }
 181 }
 182
 183 /*
 184  * add a channel to a user, creating the record for it if needed and linking
 185  * it to the user record
 186  */
 187 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 188 {
 189         // Fix: unregistered users could be joined using /SAJOIN
 190         if (!user || !cn || user->registered != REG_ALL)
 191                 return NULL;
 192
 193         char cname[MAXBUF];
 194         std::string privs;
 195         Channel *Ptr;
 196
 197         /*
 198          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 199          * We restrict local users to MaxChans channels.
 200          * We restrict local operators to OperMaxChans channels.
 201          * This is a lot more logical than how it was formerly. -- w00t
 202          */
 203         if (IS_LOCAL(user) && !override)
 204         {
 205                 // Checking MyClass exists because we *may* get here with NULL, not 100% sure.
 206                 if (user->MyClass && user->MyClass->maxchans)
 207                 {
 208                         if (user->HasPrivPermission("channels/high-join-limit"))
 209                         {
 210                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 211                                 {
 212                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 213                                         return NULL;
 214                                 }
 215                         }
 216                         else
 217                         {
 218                                 if (user->chans.size() >= user->MyClass->maxchans)
 219                                 {
 220                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 221                                         return NULL;
 222                                 }
 223                         }
 224                 }
 225         }
 226
 227         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 228         Ptr = Instance->FindChan(cname);
 229         bool created_by_local = false;
 230
 231         if (!Ptr)
 232         {
 233                 /*
 234                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 235                  */
 236                 if (!IS_LOCAL(user))
 237                 {
 238                         if (!TS)
 239                                 Instance->Logs->Log("CHANNEL",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cn);
 240                 }
 241                 else
 242                 {
 243                         privs = "@";
 244                         created_by_local = true;
 245                 }
 246
 247                 if (IS_LOCAL(user) && override == false)
 248                 {
 249                         ModResult MOD_RESULT;
 250                         FIRST_MOD_RESULT(Instance, OnUserPreJoin, MOD_RESULT, (user, NULL, cname, privs, key ? key : ""));
 251                         if (MOD_RESULT == MOD_RES_DENY)
 252                                 return NULL;
 253                 }
 254
 255                 Ptr = new Channel(Instance, cname, TS);
 256         }
 257         else
 258         {
 259                 /* Already on the channel */
 260                 if (Ptr->HasUser(user))
 261                         return NULL;
 262
 263                 /*
 264                  * remote users are allowed us to bypass channel modes
 265                  * and bans (used by servers)
 266                  */
 267                 if (IS_LOCAL(user) && override == false)
 268                 {
 269                         ModResult MOD_RESULT;
 270                         FIRST_MOD_RESULT(Instance, OnUserPreJoin, MOD_RESULT, (user, Ptr, cname, privs, key ? key : ""));
 271                         if (MOD_RESULT == MOD_RES_DENY)
 272                         {
 273                                 return NULL;
 274                         }
 275                         else if (MOD_RESULT == MOD_RES_PASSTHRU)
 276                         {
 277                                 std::string ckey = Ptr->GetModeParameter('k');
 278                                 bool invited = user->IsInvited(Ptr->name.c_str());
 279                                 bool can_bypass = Instance->Config->InvBypassModes && invited;
 280
 281                                 if (!ckey.empty())
 282                                 {
 283                                         FIRST_MOD_RESULT(Instance, OnCheckKey, MOD_RESULT, (user, Ptr, key ? key : ""));
 284                                         if (!MOD_RESULT.check((key && ckey == key) || can_bypass))
 285                                         {
 286                                                 // If no key provided, or key is not the right one, and can't bypass +k (not invited or option not enabled)
 287                                                 user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 288                                                 return NULL;
 289                                         }
 290                                 }
 291
 292                                 if (Ptr->IsModeSet('i'))
 293                                 {
 294                                         FIRST_MOD_RESULT(Instance, OnCheckInvite, MOD_RESULT, (user, Ptr));
 295                                         if (!MOD_RESULT.check(invited))
 296                                         {
 297                                                 user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 298                                                 return NULL;
 299                                         }
 300                                 }
 301
 302                                 std::string limit = Ptr->GetModeParameter('l');
 303                                 if (!limit.empty())
 304                                 {
 305                                         FIRST_MOD_RESULT(Instance, OnCheckLimit, MOD_RESULT, (user, Ptr));
 306                                         if (!MOD_RESULT.check((Ptr->GetUserCounter() < atol(limit.c_str()) || can_bypass)))
 307                                         {
 308                                                 user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 309                                                 return NULL;
 310                                         }
 311                                 }
 312
 313                                 if (Ptr->IsBanned(user) && !can_bypass)
 314                                 {
 315                                         user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 316                                         return NULL;
 317                                 }
 318
 319                                 /*
 320                                  * If the user has invites for this channel, remove them now
 321                                  * after a successful join so they don't build up.
 322                                  */
 323                                 if (invited)
 324                                 {
 325                                         user->RemoveInvite(Ptr->name.c_str());
 326                                 }
 327                         }
 328                 }
 329         }
 330
 331         if (created_by_local)
 332         {
 333                 /* As spotted by jilles, dont bother to set this on remote users */
 334                 Ptr->SetDefaultModes();
 335         }
 336
 337         return Channel::ForceChan(Instance, Ptr, user, privs, bursting, created_by_local);
 338 }
 339
 340 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting, bool created)
 341 {
 342         std::string nick = user->nick;
 343         bool silent = false;
 344
 345         Ptr->AddUser(user);
 346         user->chans.insert(Ptr);
 347
 348         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 349         {
 350                 const char status = *x;
 351                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 352                 if (mh)
 353                 {
 354                         /* Set, and make sure that the mode handler knows this mode was now set */
 355                         Ptr->SetPrefix(user, mh->GetModeChar(), mh->GetPrefixRank(), true);
 356                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 357                 }
 358         }
 359
 360         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent, created));
 361
 362         if (!silent)
 363                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 364
 365         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 366         std::string ms = Instance->Modes->ModeString(user, Ptr);
 367         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 368                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 369
 370         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 371         if (IS_LOCAL(user))
 372         {
 373                 if (Ptr->topicset)
 374                 {
 375                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 376                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 377                 }
 378                 Ptr->UserList(user);
 379         }
 380         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 381         return Ptr;
 382 }
 383
 384 bool Channel::IsBanned(User* user)
 385 {
 386         ModResult result;
 387         DO_EACH_HOOK(ServerInstance, OnCheckBan, ModResult modresult, (user, this))
 388         {
 389                 result = result + modresult;
 390         }
 391         WHILE_EACH_HOOK(ServerInstance, OnCheckBan);
 392
 393         if (result != MOD_RES_PASSTHRU)
 394                 return (result == MOD_RES_DENY);
 395
 396         char mask[MAXBUF];
 397         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 398         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 399         {
 400                 if ((InspIRCd::Match(user->GetFullHost(),i->data, NULL)) || // host
 401                         (InspIRCd::Match(user->GetFullRealHost(),i->data, NULL)) || // uncloaked host
 402                         (InspIRCd::MatchCIDR(mask, i->data, NULL))) // ip
 403                 {
 404                         return true;
 405                 }
 406         }
 407         return false;
 408 }
 409
 410 ModResult Channel::GetExtBanStatus(const std::string &str, char type)
 411 {
 412         ModResult result;
 413         DO_EACH_HOOK(ServerInstance, OnCheckStringExtBan, ModResult modresult, (str, this, type))
 414         {
 415                 result = result + modresult;
 416         }
 417         WHILE_EACH_HOOK(ServerInstance, OnCheckStringExtBan);
 418
 419         if (result != MOD_RES_PASSTHRU)
 420                 return result;
 421
 422         // nobody decided for us, check the ban list
 423         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 424         {
 425                 if (i->data[0] != type || i->data[1] != ':')
 426                         continue;
 427
 428                 std::string maskptr = i->data.substr(2);
 429                 ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 430
 431                 if (InspIRCd::Match(str, maskptr, NULL))
 432                         return MOD_RES_DENY;
 433         }
 434
 435         return MOD_RES_PASSTHRU;
 436 }
 437
 438 ModResult Channel::GetExtBanStatus(User *user, char type)
 439 {
 440         ModResult rv;
 441         DO_EACH_HOOK(ServerInstance, OnCheckExtBan, ModResult modresult, (user, this, type))
 442         {
 443                 rv = rv + modresult;
 444         }
 445         WHILE_EACH_HOOK(ServerInstance, OnCheckExtBan);
 446
 447         if (rv != MOD_RES_PASSTHRU)
 448                 return rv;
 449
 450         char mask[MAXBUF];
 451         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 452
 453         rv = rv + this->GetExtBanStatus(mask, type);
 454         rv = rv + this->GetExtBanStatus(user->GetFullHost(), type);
 455         rv = rv + this->GetExtBanStatus(user->GetFullRealHost(), type);
 456         return rv;
 457 }
 458
 459 /* Channel::PartUser
 460  * remove a channel from a users record, and return the number of users left.
 461  * Therefore, if this function returns 0 the caller should delete the Channel.
 462  */
 463 long Channel::PartUser(User *user, std::string &reason)
 464 {
 465         bool silent = false;
 466
 467         if (!user)
 468                 return this->GetUserCounter();
 469
 470         UCListIter i = user->chans.find(this);
 471         if (i != user->chans.end())
 472         {
 473                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 474
 475                 if (!silent)
 476                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 477
 478                 user->chans.erase(i);
 479                 this->RemoveAllPrefixes(user);
 480         }
 481
 482         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 483         {
 484                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 485                 /* kill the record */
 486                 if (iter != ServerInstance->chanlist->end())
 487                 {
 488                         ModResult res;
 489                         FIRST_MOD_RESULT(ServerInstance, OnChannelPreDelete, res, (this));
 490                         if (res == MOD_RES_DENY)
 491                                 return 1; // delete halted by module
 492                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 493                         ServerInstance->chanlist->erase(iter);
 494                 }
 495                 return 0;
 496         }
 497
 498         return this->GetUserCounter();
 499 }
 500
 501 long Channel::ServerKickUser(User* user, const char* reason, const char* servername)
 502 {
 503         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 504                 servername = ServerInstance->Config->ServerName;
 505
 506         ServerInstance->FakeClient->server = servername;
 507         return this->KickUser(ServerInstance->FakeClient, user, reason);
 508 }
 509
 510 long Channel::KickUser(User *src, User *user, const char* reason)
 511 {
 512         bool silent = false;
 513
 514         if (!src || !user || !reason)
 515                 return this->GetUserCounter();
 516
 517         if (IS_LOCAL(src))
 518         {
 519                 if (!this->HasUser(user))
 520                 {
 521                         src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 522                         return this->GetUserCounter();
 523                 }
 524                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 525                 {
 526                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
 527                         return this->GetUserCounter();
 528                 }
 529
 530                 ModResult res;
 531                 if (ServerInstance->ULine(src->server))
 532                         res = MOD_RES_ALLOW;
 533                 if (res == MOD_RES_PASSTHRU)
 534                         FIRST_MOD_RESULT(ServerInstance, OnUserPreKick, res, (src,user,this,reason));
 535                 if (res == MOD_RES_PASSTHRU)
 536                         FIRST_MOD_RESULT(ServerInstance, OnAccessCheck, res, (src,user,this,AC_KICK));
 537
 538                 if (res == MOD_RES_DENY)
 539                         return this->GetUserCounter();
 540
 541                 if (res == MOD_RES_PASSTHRU)
 542                 {
 543                         int them = this->GetPrefixValue(src);
 544                         int us = this->GetPrefixValue(user);
 545                         if ((them < HALFOP_VALUE) || (them < us))
 546                         {
 547                                 src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them >= HALFOP_VALUE ? "" : "half-");
 548                                 return this->GetUserCounter();
 549                         }
 550                 }
 551         }
 552
 553         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 554
 555         UCListIter i = user->chans.find(this);
 556         if (i != user->chans.end())
 557         {
 558                 /* zap it from the channel list of the user */
 559                 if (!silent)
 560                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 561
 562                 user->chans.erase(i);
 563                 this->RemoveAllPrefixes(user);
 564         }
 565
 566         if (!this->DelUser(user))
 567         /* if there are no users left on the channel */
 568         {
 569                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 570
 571                 /* kill the record */
 572                 if (iter != ServerInstance->chanlist->end())
 573                 {
 574                         ModResult res;
 575                         FIRST_MOD_RESULT(ServerInstance, OnChannelPreDelete, res, (this));
 576                         if (res == MOD_RES_DENY)
 577                                 return 1; // delete halted by module
 578                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 579                         ServerInstance->chanlist->erase(iter);
 580                 }
 581                 return 0;
 582         }
 583
 584         return this->GetUserCounter();
 585 }
 586
 587 void Channel::WriteChannel(User* user, const char* text, ...)
 588 {
 589         char textbuffer[MAXBUF];
 590         va_list argsPtr;
 591
 592         if (!user || !text)
 593                 return;
 594
 595         va_start(argsPtr, text);
 596         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 597         va_end(argsPtr);
 598
 599         this->WriteChannel(user, std::string(textbuffer));
 600 }
 601
 602 void Channel::WriteChannel(User* user, const std::string &text)
 603 {
 604         char tb[MAXBUF];
 605
 606         if (!user)
 607                 return;
 608
 609         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 610         std::string out = tb;
 611
 612         for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
 613         {
 614                 if (IS_LOCAL(i->first))
 615                         i->first->Write(out);
 616         }
 617 }
 618
 619 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 620 {
 621         char textbuffer[MAXBUF];
 622         va_list argsPtr;
 623
 624         if (!text)
 625                 return;
 626
 627         va_start(argsPtr, text);
 628         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 629         va_end(argsPtr);
 630
 631         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 632 }
 633
 634 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 635 {
 636         char tb[MAXBUF];
 637
 638         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 639         std::string out = tb;
 640
 641         for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
 642         {
 643                 if (IS_LOCAL(i->first))
 644                         i->first->Write(out);
 645         }
 646 }
 647
 648 /* write formatted text from a source user to all users on a channel except
 649  * for the sender (for privmsg etc) */
 650 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 651 {
 652         char textbuffer[MAXBUF];
 653         va_list argsPtr;
 654
 655         if (!text)
 656                 return;
 657
 658         va_start(argsPtr, text);
 659         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 660         va_end(argsPtr);
 661
 662         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 663 }
 664
 665 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 666 {
 667         char textbuffer[MAXBUF];
 668         va_list argsPtr;
 669
 670         if (!text)
 671                 return;
 672
 673         int offset = snprintf(textbuffer,MAXBUF,":%s ", user->GetFullHost().c_str());
 674
 675         va_start(argsPtr, text);
 676         vsnprintf(textbuffer + offset, MAXBUF - offset, text, argsPtr);
 677         va_end(argsPtr);
 678
 679         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 680 }
 681
 682 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 683 {
 684         char tb[MAXBUF];
 685
 686         snprintf(tb,MAXBUF,":%s %s", serversource ? ServerInstance->Config->ServerName : user->GetFullHost().c_str(), text.c_str());
 687         std::string out = tb;
 688
 689         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(tb));
 690 }
 691
 692 void Channel::RawWriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &out)
 693 {
 694         char statmode = 0;
 695         if (status)
 696         {
 697                 ModeHandler* mh = ServerInstance->Modes->FindPrefix(status);
 698                 if (mh)
 699                         statmode = mh->GetModeChar();
 700         }
 701         for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
 702         {
 703                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 704                 {
 705                         /* User doesnt have the status we're after */
 706                         if (statmode && !i->second->hasMode(statmode))
 707                                 continue;
 708
 709                         i->first->Write(out);
 710                 }
 711         }
 712 }
 713
 714 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 715 {
 716         CUList except_list;
 717         except_list.insert(user);
 718         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 719 }
 720
 721 /*
 722  * return a count of the users on a specific channel accounting for
 723  * invisible users who won't increase the count. e.g. for /LIST
 724  */
 725 int Channel::CountInvisible()
 726 {
 727         int count = 0;
 728         for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
 729         {
 730                 if (!(i->first->IsModeSet('i')))
 731                         count++;
 732         }
 733
 734         return count;
 735 }
 736
 737 char* Channel::ChanModes(bool showkey)
 738 {
 739         static char scratch[MAXBUF];
 740         static char sparam[MAXBUF];
 741         char* offset = scratch;
 742         std::string extparam;
 743
 744         *scratch = '\0';
 745         *sparam = '\0';
 746
 747         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 748         for(int n = 0; n < 64; n++)
 749         {
 750                 if(this->modes[n])
 751                 {
 752                         *offset++ = n + 65;
 753                         extparam.clear();
 754                         switch (n)
 755                         {
 756                                 case CM_KEY:
 757                                         // Unfortunately this must be special-cased, as we definitely don't want to always display key.
 758                                         if (showkey)
 759                                         {
 760                                                 extparam = this->GetModeParameter('k');
 761                                         }
 762                                         else
 763                                         {
 764                                                 extparam = "<key>";
 765                                         }
 766                                         break;
 767                                 case CM_NOEXTERNAL:
 768                                 case CM_TOPICLOCK:
 769                                 case CM_INVITEONLY:
 770                                 case CM_MODERATED:
 771                                 case CM_SECRET:
 772                                 case CM_PRIVATE:
 773                                         /* We know these have no parameters */
 774                                 break;
 775                                 default:
 776                                         extparam = this->GetModeParameter(n + 65);
 777                                 break;
 778                         }
 779                         if (!extparam.empty())
 780                         {
 781                                 charlcat(sparam,' ',MAXBUF);
 782                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 783                         }
 784                 }
 785         }
 786
 787         /* Null terminate scratch */
 788         *offset = '\0';
 789         strlcat(scratch,sparam,MAXBUF);
 790         return scratch;
 791 }
 792
 793 /* compile a userlist of a channel into a string, each nick seperated by
 794  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 795  */
 796 void Channel::UserList(User *user)
 797 {
 798         char list[MAXBUF];
 799         size_t dlen, curlen;
 800         ModResult call_modules;
 801
 802         if (!IS_LOCAL(user))
 803                 return;
 804
 805         FIRST_MOD_RESULT(ServerInstance, OnUserList, call_modules, (user, this));
 806
 807         if (call_modules != MOD_RES_ALLOW)
 808         {
 809                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 810                 {
 811                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 812                         return;
 813                 }
 814         }
 815
 816         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 817
 818         int numusers = 0;
 819         char* ptr = list + dlen;
 820
 821         /* Improvement by Brain - this doesnt change in value, so why was it inside
 822          * the loop?
 823          */
 824         bool has_user = this->HasUser(user);
 825
 826         for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
 827         {
 828                 if ((!has_user) && (i->first->IsModeSet('i')))
 829                 {
 830                         /*
 831                          * user is +i, and source not on the channel, does not show
 832                          * nick in NAMES list
 833                          */
 834                         continue;
 835                 }
 836
 837                 std::string prefixlist = this->GetPrefixChar(i->first);
 838                 std::string nick = i->first->nick;
 839
 840                 if (call_modules != MOD_RES_DENY)
 841                 {
 842                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 843
 844                         /* Nick was nuked, a module wants us to skip it */
 845                         if (nick.empty())
 846                                 continue;
 847                 }
 848
 849                 size_t ptrlen = 0;
 850
 851                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 852                 {
 853                         /* list overflowed into multiple numerics */
 854                         user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 855
 856                         /* reset our lengths */
 857                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 858                         ptr = list + dlen;
 859
 860                         ptrlen = 0;
 861                         numusers = 0;
 862                 }
 863
 864                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 865
 866                 curlen += ptrlen;
 867                 ptr += ptrlen;
 868
 869                 numusers++;
 870         }
 871
 872         /* if whats left in the list isnt empty, send it */
 873         if (numusers)
 874         {
 875                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 876         }
 877
 878         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 879 }
 880
 881 long Channel::GetMaxBans()
 882 {
 883         /* Return the cached value if there is one */
 884         if (this->maxbans)
 885                 return this->maxbans;
 886
 887         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 888         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 889         {
 890                 if (InspIRCd::Match(this->name, n->first, NULL))
 891                 {
 892                         this->maxbans = n->second;
 893                         return n->second;
 894                 }
 895         }
 896
 897         /* Screw it, just return the default of 64 */
 898         this->maxbans = 64;
 899         return this->maxbans;
 900 }
 901
 902 void Channel::ResetMaxBans()
 903 {
 904         this->maxbans = 0;
 905 }
 906
 907 /* returns the status character for a given user on a channel, e.g. @ for op,
 908  * % for halfop etc. If the user has several modes set, the highest mode
 909  * the user has must be returned.
 910  */
 911 const char* Channel::GetPrefixChar(User *user)
 912 {
 913         static char pf[2] = {0, 0};
 914         *pf = 0;
 915         unsigned int bestrank = 0;
 916
 917         UserMembIter m = userlist.find(user);
 918         if (m != userlist.end())
 919         {
 920                 for(unsigned int i=0; i < m->second->modes.length(); i++)
 921                 {
 922                         char mchar = m->second->modes[i];
 923                         ModeHandler* mh = ServerInstance->Modes->FindMode(mchar, MODETYPE_CHANNEL);
 924                         if (mh && mh->GetPrefixRank() > bestrank)
 925                         {
 926                                 bestrank = mh->GetPrefixRank();
 927                                 pf[0] = mh->GetPrefix();
 928                         }
 929                 }
 930         }
 931         return pf;
 932 }
 933
 934
 935 const char* Channel::GetAllPrefixChars(User* user)
 936 {
 937         static char prefix[64];
 938         int ctr = 0;
 939
 940         UserMembIter m = userlist.find(user);
 941         if (m != userlist.end())
 942         {
 943                 for(unsigned int i=0; i < m->second->modes.length(); i++)
 944                 {
 945                         char mchar = m->second->modes[i];
 946                         ModeHandler* mh = ServerInstance->Modes->FindMode(mchar, MODETYPE_CHANNEL);
 947                         if (mh && mh->GetPrefix())
 948                                 prefix[ctr++] = mh->GetPrefix();
 949                 }
 950         }
 951         prefix[ctr] = 0;
 952
 953         return prefix;
 954 }
 955
 956 unsigned int Channel::GetPrefixValue(User* user)
 957 {
 958         unsigned int bestrank = 0;
 959
 960         UserMembIter m = userlist.find(user);
 961         if (m != userlist.end())
 962         {
 963                 for(unsigned int i=0; i < m->second->modes.length(); i++)
 964                 {
 965                         char mchar = m->second->modes[i];
 966                         ModeHandler* mh = ServerInstance->Modes->FindMode(mchar, MODETYPE_CHANNEL);
 967                         if (mh && mh->GetPrefixRank() > bestrank)
 968                                 bestrank = mh->GetPrefixRank();
 969                 }
 970         }
 971         return bestrank;
 972 }
 973
 974 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
 975 {
 976         UserMembIter m = userlist.find(user);
 977         if (m != userlist.end())
 978         {
 979                 for(unsigned int i=0; i < m->second->modes.length(); i++)
 980                 {
 981                         char mchar = m->second->modes[i];
 982                         ModeHandler* mh = ServerInstance->Modes->FindMode(mchar, MODETYPE_CHANNEL);
 983                         if (mh && mh->GetPrefixRank() <= prefix_value)
 984                         {
 985                                 m->second->modes =
 986                                         m->second->modes.substr(0,i-1) +
 987                                         (adding ? std::string(1, prefix) : "") +
 988                                         m->second->modes.substr(mchar == prefix ? i+1 : i);
 989                                 return;
 990                         }
 991                 }
 992                 m->second->modes += std::string(1, prefix);
 993         }
 994 }
 995
 996 void Channel::RemoveAllPrefixes(User* user)
 997 {
 998         UserMembIter m = userlist.find(user);
 999         if (m != userlist.end())
1000         {
1001                 m->second->modes.clear();
1002         }
1003 }