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 bool Channel::IsModeSet(char mode)
  57 {
  58         return modes[mode-65];
  59 }
  60
  61 std::string Channel::GetModeParameter(char mode)
  62 {
  63         CustomModeList::iterator n = custom_mode_params.find(mode);
  64         if (n != custom_mode_params.end())
  65                 return n->second;
  66         return "";
  67 }
  68
  69 int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
  70 {
  71         if (u && IS_LOCAL(u))
  72         {
  73                 if(!forceset)
  74                 {
  75                         int MOD_RESULT = 0;
  76                         /* 0: check status, 1: don't, -1: disallow change silently */
  77
  78                         FOREACH_RESULT(I_OnLocalTopicChange,OnLocalTopicChange(u,this,ntopic));
  79
  80                         if (MOD_RESULT == 1)
  81                                 return CMD_FAILURE;
  82                         else if (MOD_RESULT == 0)
  83                         {
  84                                 if (!this->HasUser(u))
  85                                 {
  86                                         u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
  87                                         return CMD_FAILURE;
  88                                 }
  89                                 if ((this->IsModeSet('t')) && (this->GetStatus(u) < STATUS_HOP))
  90                                 {
  91                                         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());
  92                                         return CMD_FAILURE;
  93                                 }
  94                         }
  95                 }
  96         }
  97
  98         this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
  99         if (u)
 100         {
 101                 this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
 102                 this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 103         }
 104         else
 105         {
 106                 this->setby.assign(ServerInstance->Config->ServerName);
 107                 this->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 108         }
 109
 110         this->topicset = ServerInstance->Time();
 111
 112         if (u && IS_LOCAL(u))
 113         {
 114                 FOREACH_MOD(I_OnPostLocalTopicChange,OnPostLocalTopicChange(u, this, this->topic));
 115         }
 116
 117         return CMD_SUCCESS;
 118 }
 119
 120 long Channel::GetUserCounter()
 121 {
 122         return (this->internal_userlist.size());
 123 }
 124
 125 void Channel::AddUser(User* user)
 126 {
 127         internal_userlist[user] = user->nick;
 128 }
 129
 130 unsigned long Channel::DelUser(User* user)
 131 {
 132         CUListIter a = internal_userlist.find(user);
 133
 134         if (a != internal_userlist.end())
 135         {
 136                 internal_userlist.erase(a);
 137                 /* And tidy any others... */
 138                 DelOppedUser(user);
 139                 DelHalfoppedUser(user);
 140                 DelVoicedUser(user);
 141         }
 142
 143         return internal_userlist.size();
 144 }
 145
 146 bool Channel::HasUser(User* user)
 147 {
 148         return (internal_userlist.find(user) != internal_userlist.end());
 149 }
 150
 151 void Channel::AddOppedUser(User* user)
 152 {
 153         internal_op_userlist[user] = user->nick;
 154 }
 155
 156 void Channel::DelOppedUser(User* user)
 157 {
 158         CUListIter a = internal_op_userlist.find(user);
 159         if (a != internal_op_userlist.end())
 160         {
 161                 internal_op_userlist.erase(a);
 162                 return;
 163         }
 164 }
 165
 166 void Channel::AddHalfoppedUser(User* user)
 167 {
 168         internal_halfop_userlist[user] = user->nick;
 169 }
 170
 171 void Channel::DelHalfoppedUser(User* user)
 172 {
 173         CUListIter a = internal_halfop_userlist.find(user);
 174
 175         if (a != internal_halfop_userlist.end())
 176         {
 177                 internal_halfop_userlist.erase(a);
 178         }
 179 }
 180
 181 void Channel::AddVoicedUser(User* user)
 182 {
 183         internal_voice_userlist[user] = user->nick;
 184 }
 185
 186 void Channel::DelVoicedUser(User* user)
 187 {
 188         CUListIter a = internal_voice_userlist.find(user);
 189
 190         if (a != internal_voice_userlist.end())
 191         {
 192                 internal_voice_userlist.erase(a);
 193         }
 194 }
 195
 196 CUList* Channel::GetUsers()
 197 {
 198         return &internal_userlist;
 199 }
 200
 201 CUList* Channel::GetOppedUsers()
 202 {
 203         return &internal_op_userlist;
 204 }
 205
 206 CUList* Channel::GetHalfoppedUsers()
 207 {
 208         return &internal_halfop_userlist;
 209 }
 210
 211 CUList* Channel::GetVoicedUsers()
 212 {
 213         return &internal_voice_userlist;
 214 }
 215
 216 void Channel::SetDefaultModes()
 217 {
 218         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 219         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 220         std::string modeseq;
 221         std::string parameter;
 222
 223         list.GetToken(modeseq);
 224
 225         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 226         {
 227                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 228                 if (mode)
 229                 {
 230                         if (mode->GetNumParams(true))
 231                                 list.GetToken(parameter);
 232                         else
 233                                 parameter.clear();
 234
 235                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 236                 }
 237         }
 238 }
 239
 240 /*
 241  * add a channel to a user, creating the record for it if needed and linking
 242  * it to the user record
 243  */
 244 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 245 {
 246         // Fix: unregistered users could be joined using /SAJOIN
 247         if (!user || !cn || user->registered != REG_ALL)
 248                 return NULL;
 249
 250         char cname[MAXBUF];
 251         int MOD_RESULT = 0;
 252         std::string privs;
 253         Channel *Ptr;
 254
 255         /*
 256          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 257          * We restrict local users to MaxChans channels.
 258          * We restrict local operators to OperMaxChans channels.
 259          * This is a lot more logical than how it was formerly. -- w00t
 260          */
 261         if (IS_LOCAL(user) && !override)
 262         {
 263                 // Checking MyClass exists because we *may* get here with NULL, not 100% sure.
 264                 if (user->MyClass && user->MyClass->maxchans)
 265                 {
 266                         if (user->HasPrivPermission("channels/high-join-limit"))
 267                         {
 268                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 269                                 {
 270                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 271                                         return NULL;
 272                                 }
 273                         }
 274                         else
 275                         {
 276                                 if (user->chans.size() >= user->MyClass->maxchans)
 277                                 {
 278                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 279                                         return NULL;
 280                                 }
 281                         }
 282                 }
 283         }
 284
 285         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 286         Ptr = Instance->FindChan(cname);
 287         bool created_by_local = false;
 288
 289         if (!Ptr)
 290         {
 291                 /*
 292                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 293                  */
 294                 if (!IS_LOCAL(user))
 295                 {
 296                         if (!TS)
 297                                 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);
 298                 }
 299                 else
 300                 {
 301                         privs = "@";
 302                         created_by_local = true;
 303                 }
 304
 305                 if (IS_LOCAL(user) && override == false)
 306                 {
 307                         MOD_RESULT = 0;
 308                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, NULL, cname, privs, key ? key : ""));
 309                         if (MOD_RESULT == 1)
 310                                 return NULL;
 311                 }
 312
 313                 Ptr = new Channel(Instance, cname, TS);
 314         }
 315         else
 316         {
 317                 /* Already on the channel */
 318                 if (Ptr->HasUser(user))
 319                         return NULL;
 320
 321                 /*
 322                  * remote users are allowed us to bypass channel modes
 323                  * and bans (used by servers)
 324                  */
 325                 if (IS_LOCAL(user) && override == false)
 326                 {
 327                         MOD_RESULT = 0;
 328                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, Ptr, cname, privs, key ? key : ""));
 329                         if (MOD_RESULT == 1)
 330                         {
 331                                 return NULL;
 332                         }
 333                         else if (MOD_RESULT == 0)
 334                         {
 335                                 std::string ckey = Ptr->GetModeParameter('k');
 336                                 bool invited = user->IsInvited(Ptr->name.c_str());
 337                                 bool can_bypass = Instance->Config->InvBypassModes && invited;
 338
 339                                 if (!ckey.empty())
 340                                 {
 341                                         MOD_RESULT = 0;
 342                                         FOREACH_RESULT_I(Instance, I_OnCheckKey, OnCheckKey(user, Ptr, key ? key : ""));
 343                                         if (!MOD_RESULT)
 344                                         {
 345                                                 // If no key provided, or key is not the right one, and can't bypass +k (not invited or option not enabled)
 346                                                 if ((!key || ckey != key) && !can_bypass)
 347                                                 {
 348                                                         user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 349                                                         return NULL;
 350                                                 }
 351                                         }
 352                                 }
 353
 354                                 if (Ptr->IsModeSet('i'))
 355                                 {
 356                                         MOD_RESULT = 0;
 357                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 358                                         if (!MOD_RESULT)
 359                                         {
 360                                                 if (!invited)
 361                                                 {
 362                                                         user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 363                                                         return NULL;
 364                                                 }
 365                                         }
 366                                 }
 367
 368                                 std::string limit = Ptr->GetModeParameter('l');
 369                                 if (!limit.empty())
 370                                 {
 371                                         MOD_RESULT = 0;
 372                                         FOREACH_RESULT_I(Instance, I_OnCheckLimit, OnCheckLimit(user, Ptr));
 373                                         if (!MOD_RESULT)
 374                                         {
 375                                                 long llimit = atol(limit.c_str());
 376                                                 if (Ptr->GetUserCounter() >= llimit && !can_bypass)
 377                                                 {
 378                                                         user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 379                                                         return NULL;
 380                                                 }
 381                                         }
 382                                 }
 383
 384                                 if (Ptr->IsBanned(user) && !can_bypass)
 385                                 {
 386                                         user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 387                                         return NULL;
 388                                 }
 389
 390                                 /*
 391                                  * If the user has invites for this channel, remove them now
 392                                  * after a successful join so they don't build up.
 393                                  */
 394                                 if (invited)
 395                                 {
 396                                         user->RemoveInvite(Ptr->name.c_str());
 397                                 }
 398                         }
 399                 }
 400         }
 401
 402         if (created_by_local)
 403         {
 404                 /* As spotted by jilles, dont bother to set this on remote users */
 405                 Ptr->SetDefaultModes();
 406         }
 407
 408         return Channel::ForceChan(Instance, Ptr, user, privs, bursting, created_by_local);
 409 }
 410
 411 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting, bool created)
 412 {
 413         std::string nick = user->nick;
 414         bool silent = false;
 415
 416         Ptr->AddUser(user);
 417
 418         /* Just in case they have no permissions */
 419         user->chans[Ptr] = 0;
 420
 421         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 422         {
 423                 const char status = *x;
 424                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 425                 if (mh)
 426                 {
 427                         /* Set, and make sure that the mode handler knows this mode was now set */
 428                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 429                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 430
 431                         switch (mh->GetPrefix())
 432                         {
 433                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 434                                  * addressing operator[] creates it. If they do exist, it points to it.
 435                                  * At all other times where we dont want to create an item if it doesnt exist, we
 436                                  * must stick to ::find().
 437                                  */
 438                                 case '@':
 439                                         user->chans[Ptr] |= UCMODE_OP;
 440                                 break;
 441                                 case '%':
 442                                         user->chans[Ptr] |= UCMODE_HOP;
 443                                 break;
 444                                 case '+':
 445                                         user->chans[Ptr] |= UCMODE_VOICE;
 446                                 break;
 447                         }
 448                 }
 449         }
 450
 451         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent, created));
 452
 453         if (!silent)
 454                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 455
 456         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 457         std::string ms = Instance->Modes->ModeString(user, Ptr);
 458         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 459                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 460
 461         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 462         if (IS_LOCAL(user))
 463         {
 464                 if (Ptr->topicset)
 465                 {
 466                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 467                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 468                 }
 469                 Ptr->UserList(user);
 470         }
 471         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 472         return Ptr;
 473 }
 474
 475 bool Channel::IsBanned(User* user)
 476 {
 477         int result = 0;
 478         DO_EACH_HOOK(ServerInstance, OnCheckBan, int modresult, (user, this))
 479         {
 480                 result = banmatch_reduce(result, modresult);
 481         }
 482         WHILE_EACH_HOOK(ServerInstance, OnCheckBan);
 483
 484         if (result)
 485                 return (result < 0);
 486
 487         char mask[MAXBUF];
 488         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 489         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 490         {
 491                 if ((InspIRCd::Match(user->GetFullHost(),i->data, NULL)) || // host
 492                         (InspIRCd::Match(user->GetFullRealHost(),i->data, NULL)) || // uncloaked host
 493                         (InspIRCd::MatchCIDR(mask, i->data, NULL))) // ip
 494                 {
 495                         return true;
 496                 }
 497         }
 498         return false;
 499 }
 500
 501 int Channel::GetExtBanStatus(const std::string &str, char type)
 502 {
 503         int result = 0;
 504         DO_EACH_HOOK(ServerInstance, OnCheckStringExtBan, int modresult, (str, this, type))
 505         {
 506                 result = banmatch_reduce(result, modresult);
 507         }
 508         WHILE_EACH_HOOK(ServerInstance, OnCheckStringExtBan);
 509
 510         if (result)
 511                 return result;
 512
 513         // nobody decided for us, check the ban list
 514         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 515         {
 516                 if (i->data[0] != type || i->data[1] != ':')
 517                         continue;
 518
 519                 std::string maskptr = i->data.substr(2);
 520                 ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 521
 522                 if (InspIRCd::Match(str, maskptr, NULL))
 523                         return -1;
 524         }
 525
 526         return 0;
 527 }
 528
 529 int Channel::GetExtBanStatus(User *user, char type)
 530 {
 531         int result = 0;
 532         DO_EACH_HOOK(ServerInstance, OnCheckExtBan, int modresult, (user, this, type))
 533         {
 534                 result = banmatch_reduce(result, modresult);
 535         }
 536         WHILE_EACH_HOOK(ServerInstance, OnCheckExtBan);
 537
 538         if (result)
 539                 return result;
 540
 541         char mask[MAXBUF];
 542         int rv = 0;
 543         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 544
 545         // XXX: we should probably hook cloaked hosts in here somehow too..
 546         rv = banmatch_reduce(rv, this->GetExtBanStatus(mask, type));
 547         rv = banmatch_reduce(rv, this->GetExtBanStatus(user->GetFullHost(), type));
 548         rv = banmatch_reduce(rv, this->GetExtBanStatus(user->GetFullRealHost(), type));
 549         return rv;
 550 }
 551
 552 /* Channel::PartUser
 553  * remove a channel from a users record, and return the number of users left.
 554  * Therefore, if this function returns 0 the caller should delete the Channel.
 555  */
 556 long Channel::PartUser(User *user, std::string &reason)
 557 {
 558         bool silent = false;
 559
 560         if (!user)
 561                 return this->GetUserCounter();
 562
 563         UCListIter i = user->chans.find(this);
 564         if (i != user->chans.end())
 565         {
 566                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 567
 568                 if (!silent)
 569                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 570
 571                 user->chans.erase(i);
 572                 this->RemoveAllPrefixes(user);
 573         }
 574
 575         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 576         {
 577                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 578                 /* kill the record */
 579                 if (iter != ServerInstance->chanlist->end())
 580                 {
 581                         int MOD_RESULT = 0;
 582                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 583                         if (MOD_RESULT == 1)
 584                                 return 1; // delete halted by module
 585                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 586                         ServerInstance->chanlist->erase(iter);
 587                 }
 588                 return 0;
 589         }
 590
 591         return this->GetUserCounter();
 592 }
 593
 594 long Channel::ServerKickUser(User* user, const char* reason, const char* servername)
 595 {
 596         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 597                 servername = ServerInstance->Config->ServerName;
 598
 599         ServerInstance->FakeClient->server = servername;
 600         return this->KickUser(ServerInstance->FakeClient, user, reason);
 601 }
 602
 603 long Channel::KickUser(User *src, User *user, const char* reason)
 604 {
 605         bool silent = false;
 606
 607         if (!src || !user || !reason)
 608                 return this->GetUserCounter();
 609
 610         if (IS_LOCAL(src))
 611         {
 612                 if (!this->HasUser(user))
 613                 {
 614                         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());
 615                         return this->GetUserCounter();
 616                 }
 617                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 618                 {
 619                         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());
 620                         return this->GetUserCounter();
 621                 }
 622                 int MOD_RESULT = 0;
 623
 624                 if (!ServerInstance->ULine(src->server))
 625                 {
 626                         MOD_RESULT = 0;
 627                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 628                         if (MOD_RESULT == 1)
 629                                 return this->GetUserCounter();
 630                 }
 631                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 632                 if (MOD_RESULT != -1)
 633                 {
 634                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 635                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 636                                 return this->GetUserCounter();
 637
 638                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 639                         {
 640                                 int them = this->GetStatus(src);
 641                                 int us = this->GetStatus(user);
 642                                 if ((them < STATUS_HOP) || (them < us))
 643                                 {
 644                                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 645                                         return this->GetUserCounter();
 646                                 }
 647                         }
 648                 }
 649         }
 650
 651         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 652
 653         UCListIter i = user->chans.find(this);
 654         if (i != user->chans.end())
 655         {
 656                 /* zap it from the channel list of the user */
 657                 if (!silent)
 658                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 659
 660                 user->chans.erase(i);
 661                 this->RemoveAllPrefixes(user);
 662         }
 663
 664         if (!this->DelUser(user))
 665         /* if there are no users left on the channel */
 666         {
 667                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 668
 669                 /* kill the record */
 670                 if (iter != ServerInstance->chanlist->end())
 671                 {
 672                         int MOD_RESULT = 0;
 673                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 674                         if (MOD_RESULT == 1)
 675                                 return 1; // delete halted by module
 676                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 677                         ServerInstance->chanlist->erase(iter);
 678                 }
 679                 return 0;
 680         }
 681
 682         return this->GetUserCounter();
 683 }
 684
 685 void Channel::WriteChannel(User* user, const char* text, ...)
 686 {
 687         char textbuffer[MAXBUF];
 688         va_list argsPtr;
 689
 690         if (!user || !text)
 691                 return;
 692
 693         va_start(argsPtr, text);
 694         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 695         va_end(argsPtr);
 696
 697         this->WriteChannel(user, std::string(textbuffer));
 698 }
 699
 700 void Channel::WriteChannel(User* user, const std::string &text)
 701 {
 702         CUList *ulist = this->GetUsers();
 703         char tb[MAXBUF];
 704
 705         if (!user)
 706                 return;
 707
 708         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 709         std::string out = tb;
 710
 711         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 712         {
 713                 if (IS_LOCAL(i->first))
 714                         i->first->Write(out);
 715         }
 716 }
 717
 718 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 719 {
 720         char textbuffer[MAXBUF];
 721         va_list argsPtr;
 722
 723         if (!text)
 724                 return;
 725
 726         va_start(argsPtr, text);
 727         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 728         va_end(argsPtr);
 729
 730         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 731 }
 732
 733 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 734 {
 735         CUList *ulist = this->GetUsers();
 736         char tb[MAXBUF];
 737
 738         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 739         std::string out = tb;
 740
 741         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 742         {
 743                 if (IS_LOCAL(i->first))
 744                         i->first->Write(out);
 745         }
 746 }
 747
 748 /* write formatted text from a source user to all users on a channel except
 749  * for the sender (for privmsg etc) */
 750 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 751 {
 752         char textbuffer[MAXBUF];
 753         va_list argsPtr;
 754
 755         if (!text)
 756                 return;
 757
 758         va_start(argsPtr, text);
 759         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 760         va_end(argsPtr);
 761
 762         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 763 }
 764
 765 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 766 {
 767         char textbuffer[MAXBUF];
 768         va_list argsPtr;
 769
 770         if (!text)
 771                 return;
 772
 773         int offset = snprintf(textbuffer,MAXBUF,":%s ", user->GetFullHost().c_str());
 774
 775         va_start(argsPtr, text);
 776         vsnprintf(textbuffer + offset, MAXBUF - offset, text, argsPtr);
 777         va_end(argsPtr);
 778
 779         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 780 }
 781
 782 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 783 {
 784         char tb[MAXBUF];
 785
 786         snprintf(tb,MAXBUF,":%s %s", serversource ? ServerInstance->Config->ServerName : user->GetFullHost().c_str(), text.c_str());
 787         std::string out = tb;
 788
 789         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(tb));
 790 }
 791
 792 void Channel::RawWriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &out)
 793 {
 794         CUList *ulist = this->GetUsers();
 795         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 796         {
 797                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 798                 {
 799                         /* User doesnt have the status we're after */
 800                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 801                                 continue;
 802
 803                         i->first->Write(out);
 804                 }
 805         }
 806 }
 807
 808 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 809 {
 810         CUList except_list;
 811         except_list[user] = user->nick;
 812         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 813 }
 814
 815 /*
 816  * return a count of the users on a specific channel accounting for
 817  * invisible users who won't increase the count. e.g. for /LIST
 818  */
 819 int Channel::CountInvisible()
 820 {
 821         int count = 0;
 822         CUList *ulist= this->GetUsers();
 823         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 824         {
 825                 if (!(i->first->IsModeSet('i')))
 826                         count++;
 827         }
 828
 829         return count;
 830 }
 831
 832 char* Channel::ChanModes(bool showkey)
 833 {
 834         static char scratch[MAXBUF];
 835         static char sparam[MAXBUF];
 836         char* offset = scratch;
 837         std::string extparam;
 838
 839         *scratch = '\0';
 840         *sparam = '\0';
 841
 842         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 843         for(int n = 0; n < 64; n++)
 844         {
 845                 if(this->modes[n])
 846                 {
 847                         *offset++ = n + 65;
 848                         extparam.clear();
 849                         switch (n)
 850                         {
 851                                 case CM_KEY:
 852                                         // Unfortunately this must be special-cased, as we definitely don't want to always display key.
 853                                         if (showkey)
 854                                         {
 855                                                 extparam = this->GetModeParameter('k');
 856                                         }
 857                                         else
 858                                         {
 859                                                 extparam = "<key>";
 860                                         }
 861                                         break;
 862                                 case CM_NOEXTERNAL:
 863                                 case CM_TOPICLOCK:
 864                                 case CM_INVITEONLY:
 865                                 case CM_MODERATED:
 866                                 case CM_SECRET:
 867                                 case CM_PRIVATE:
 868                                         /* We know these have no parameters */
 869                                 break;
 870                                 default:
 871                                         extparam = this->GetModeParameter(n + 65);
 872                                 break;
 873                         }
 874                         if (!extparam.empty())
 875                         {
 876                                 charlcat(sparam,' ',MAXBUF);
 877                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 878                         }
 879                 }
 880         }
 881
 882         /* Null terminate scratch */
 883         *offset = '\0';
 884         strlcat(scratch,sparam,MAXBUF);
 885         return scratch;
 886 }
 887
 888 /* compile a userlist of a channel into a string, each nick seperated by
 889  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 890  */
 891 void Channel::UserList(User *user, CUList *ulist)
 892 {
 893         char list[MAXBUF];
 894         size_t dlen, curlen;
 895         int MOD_RESULT = 0;
 896         bool call_modules = true;
 897
 898         if (!IS_LOCAL(user))
 899                 return;
 900
 901         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 902         if (MOD_RESULT == 1)
 903                 call_modules = false;
 904
 905         if (MOD_RESULT != -1)
 906         {
 907                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 908                 {
 909                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 910                         return;
 911                 }
 912         }
 913
 914         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 915
 916         int numusers = 0;
 917         char* ptr = list + dlen;
 918
 919         if (!ulist)
 920                 ulist = this->GetUsers();
 921
 922         /* Improvement by Brain - this doesnt change in value, so why was it inside
 923          * the loop?
 924          */
 925         bool has_user = this->HasUser(user);
 926
 927         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 928         {
 929                 if ((!has_user) && (i->first->IsModeSet('i')))
 930                 {
 931                         /*
 932                          * user is +i, and source not on the channel, does not show
 933                          * nick in NAMES list
 934                          */
 935                         continue;
 936                 }
 937
 938                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 939                         continue;
 940
 941                 std::string prefixlist = this->GetPrefixChar(i->first);
 942                 std::string nick = i->first->nick;
 943
 944                 if (call_modules)
 945                 {
 946                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 947
 948                         /* Nick was nuked, a module wants us to skip it */
 949                         if (nick.empty())
 950                                 continue;
 951                 }
 952
 953                 size_t ptrlen = 0;
 954
 955                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 956                 {
 957                         /* list overflowed into multiple numerics */
 958                         user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 959
 960                         /* reset our lengths */
 961                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 962                         ptr = list + dlen;
 963
 964                         ptrlen = 0;
 965                         numusers = 0;
 966                 }
 967
 968                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 969
 970                 curlen += ptrlen;
 971                 ptr += ptrlen;
 972
 973                 numusers++;
 974         }
 975
 976         /* if whats left in the list isnt empty, send it */
 977         if (numusers)
 978         {
 979                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 980         }
 981
 982         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 983 }
 984
 985 long Channel::GetMaxBans()
 986 {
 987         /* Return the cached value if there is one */
 988         if (this->maxbans)
 989                 return this->maxbans;
 990
 991         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 992         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 993         {
 994                 if (InspIRCd::Match(this->name, n->first, NULL))
 995                 {
 996                         this->maxbans = n->second;
 997                         return n->second;
 998                 }
 999         }
1000
1001         /* Screw it, just return the default of 64 */
1002         this->maxbans = 64;
1003         return this->maxbans;
1004 }
1005
1006 void Channel::ResetMaxBans()
1007 {
1008         this->maxbans = 0;
1009 }
1010
1011 /* returns the status character for a given user on a channel, e.g. @ for op,
1012  * % for halfop etc. If the user has several modes set, the highest mode
1013  * the user has must be returned.
1014  */
1015 const char* Channel::GetPrefixChar(User *user)
1016 {
1017         static char pf[2] = {0, 0};
1018
1019         prefixlist::iterator n = prefixes.find(user);
1020         if (n != prefixes.end())
1021         {
1022                 if (n->second.size())
1023                 {
1024                         /* If the user has any prefixes, their highest prefix
1025                          * will always be at the head of the list, as the list is
1026                          * sorted in rank order highest first (see SetPrefix()
1027                          * for reasons why)
1028                          */
1029                         *pf = n->second.begin()->first;
1030                         return pf;
1031                 }
1032         }
1033
1034         *pf = 0;
1035         return pf;
1036 }
1037
1038
1039 const char* Channel::GetAllPrefixChars(User* user)
1040 {
1041         static char prefix[MAXBUF];
1042         int ctr = 0;
1043         *prefix = 0;
1044
1045         prefixlist::iterator n = prefixes.find(user);
1046         if (n != prefixes.end())
1047         {
1048                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1049                 {
1050                         prefix[ctr++] = x->first;
1051                 }
1052         }
1053
1054         prefix[ctr] = 0;
1055
1056         return prefix;
1057 }
1058
1059 unsigned int Channel::GetPrefixValue(User* user)
1060 {
1061         prefixlist::iterator n = prefixes.find(user);
1062         if (n != prefixes.end())
1063         {
1064                 if (n->second.size())
1065                         return n->second.begin()->second;
1066         }
1067         return 0;
1068 }
1069
1070 int Channel::GetStatusFlags(User *user)
1071 {
1072         UCListIter i = user->chans.find(this);
1073         if (i != user->chans.end())
1074         {
1075                 return i->second;
1076         }
1077         return 0;
1078 }
1079
1080 int Channel::GetStatus(User *user)
1081 {
1082         if (ServerInstance->ULine(user->server))
1083                 return STATUS_OP;
1084
1085         UCListIter i = user->chans.find(this);
1086         if (i != user->chans.end())
1087         {
1088                 if ((i->second & UCMODE_OP) > 0)
1089                 {
1090                         return STATUS_OP;
1091                 }
1092                 if ((i->second & UCMODE_HOP) > 0)
1093                 {
1094                         return STATUS_HOP;
1095                 }
1096                 if ((i->second & UCMODE_VOICE) > 0)
1097                 {
1098                         return STATUS_VOICE;
1099                 }
1100                 return STATUS_NORMAL;
1101         }
1102         return STATUS_NORMAL;
1103 }
1104
1105 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1106 {
1107         prefixlist::iterator n = prefixes.find(user);
1108         prefixtype pfx = std::make_pair(prefix,prefix_value);
1109         if (adding)
1110         {
1111                 if (n != prefixes.end())
1112                 {
1113                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1114                         {
1115                                 n->second.push_back(pfx);
1116                                 /* We must keep prefixes in rank order, largest first.
1117                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1118                                  * state, and secondly it turns out to be a benefit to us later.
1119                                  * See above in GetPrefix().
1120                                  */
1121                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1122                         }
1123                 }
1124                 else
1125                 {
1126                         pfxcontainer one;
1127                         one.push_back(pfx);
1128                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1129                 }
1130         }
1131         else
1132         {
1133                 if (n != prefixes.end())
1134                 {
1135                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1136                         if (x != n->second.end())
1137                                 n->second.erase(x);
1138                 }
1139         }
1140 }
1141
1142 void Channel::RemoveAllPrefixes(User* user)
1143 {
1144         prefixlist::iterator n = prefixes.find(user);
1145         if (n != prefixes.end())
1146         {
1147                 prefixes.erase(n);
1148         }
1149 }