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 */
  15
  16 #include "inspircd.h"
  17 #include <cstdarg>
  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         this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
  29         this->created = ts ? ts : ServerInstance->Time();
  30         this->age = this->created;
  31
  32         maxbans = topicset = 0;
  33         modes.reset();
  34 }
  35
  36 void Channel::SetMode(char mode,bool mode_on)
  37 {
  38         modes[mode-65] = mode_on;
  39         if (!mode_on)
  40                 this->SetModeParam(mode,"",false);
  41 }
  42
  43
  44 void Channel::SetModeParam(char mode,const char* parameter,bool mode_on)
  45 {
  46         CustomModeList::iterator n = custom_mode_params.find(mode);
  47
  48         if (mode_on)
  49         {
  50                 if (n == custom_mode_params.end())
  51                         custom_mode_params[mode] = strdup(parameter);
  52         }
  53         else
  54         {
  55                 if (n != custom_mode_params.end())
  56                 {
  57                         free(n->second);
  58                         custom_mode_params.erase(n);
  59                 }
  60         }
  61 }
  62
  63 bool Channel::IsModeSet(char mode)
  64 {
  65         return modes[mode-65];
  66 }
  67
  68 std::string Channel::GetModeParameter(char mode)
  69 {
  70         CustomModeList::iterator n = custom_mode_params.find(mode);
  71         if (n != custom_mode_params.end())
  72                 return n->second;
  73         return "";
  74 }
  75
  76 int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
  77 {
  78         if (IS_LOCAL(u))
  79         {
  80                 if(!forceset)
  81                 {
  82                         int MOD_RESULT = 0;
  83                         /* 0: check status, 1: don't, -1: disallow change silently */
  84
  85                         FOREACH_RESULT(I_OnLocalTopicChange,OnLocalTopicChange(u,this,ntopic));
  86
  87                         if (MOD_RESULT == 1)
  88                                 return CMD_FAILURE;
  89                         else if (MOD_RESULT == 0)
  90                         {
  91                                 if (!this->HasUser(u))
  92                                 {
  93                                         u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
  94                                         return CMD_FAILURE;
  95                                 }
  96                                 if ((this->IsModeSet('t')) && (this->GetStatus(u) < STATUS_HOP))
  97                                 {
  98                                         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());
  99                                         return CMD_FAILURE;
 100                                 }
 101                         }
 102                 }
 103         }
 104
 105         this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
 106         this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
 107         this->topicset = ServerInstance->Time();
 108         this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 109
 110         if (IS_LOCAL(u))
 111         {
 112                 FOREACH_MOD(I_OnPostLocalTopicChange,OnPostLocalTopicChange(u, this, this->topic));
 113         }
 114
 115         return CMD_SUCCESS;
 116 }
 117
 118 long Channel::GetUserCounter()
 119 {
 120         return (this->internal_userlist.size());
 121 }
 122
 123 void Channel::AddUser(User* user)
 124 {
 125         internal_userlist[user] = user->nick;
 126 }
 127
 128 unsigned long Channel::DelUser(User* user)
 129 {
 130         CUListIter a = internal_userlist.find(user);
 131
 132         if (a != internal_userlist.end())
 133         {
 134                 internal_userlist.erase(a);
 135                 /* And tidy any others... */
 136                 DelOppedUser(user);
 137                 DelHalfoppedUser(user);
 138                 DelVoicedUser(user);
 139         }
 140
 141         return internal_userlist.size();
 142 }
 143
 144 bool Channel::HasUser(User* user)
 145 {
 146         return (internal_userlist.find(user) != internal_userlist.end());
 147 }
 148
 149 void Channel::AddOppedUser(User* user)
 150 {
 151         internal_op_userlist[user] = user->nick;
 152 }
 153
 154 void Channel::DelOppedUser(User* user)
 155 {
 156         CUListIter a = internal_op_userlist.find(user);
 157         if (a != internal_op_userlist.end())
 158         {
 159                 internal_op_userlist.erase(a);
 160                 return;
 161         }
 162 }
 163
 164 void Channel::AddHalfoppedUser(User* user)
 165 {
 166         internal_halfop_userlist[user] = user->nick;
 167 }
 168
 169 void Channel::DelHalfoppedUser(User* user)
 170 {
 171         CUListIter a = internal_halfop_userlist.find(user);
 172
 173         if (a != internal_halfop_userlist.end())
 174         {
 175                 internal_halfop_userlist.erase(a);
 176         }
 177 }
 178
 179 void Channel::AddVoicedUser(User* user)
 180 {
 181         internal_voice_userlist[user] = user->nick;
 182 }
 183
 184 void Channel::DelVoicedUser(User* user)
 185 {
 186         CUListIter a = internal_voice_userlist.find(user);
 187
 188         if (a != internal_voice_userlist.end())
 189         {
 190                 internal_voice_userlist.erase(a);
 191         }
 192 }
 193
 194 CUList* Channel::GetUsers()
 195 {
 196         return &internal_userlist;
 197 }
 198
 199 CUList* Channel::GetOppedUsers()
 200 {
 201         return &internal_op_userlist;
 202 }
 203
 204 CUList* Channel::GetHalfoppedUsers()
 205 {
 206         return &internal_halfop_userlist;
 207 }
 208
 209 CUList* Channel::GetVoicedUsers()
 210 {
 211         return &internal_voice_userlist;
 212 }
 213
 214 void Channel::SetDefaultModes()
 215 {
 216         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 217         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 218         std::string modeseq;
 219         std::string parameter;
 220
 221         list.GetToken(modeseq);
 222
 223         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 224         {
 225                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 226                 if (mode)
 227                 {
 228                         if (mode->GetNumParams(true))
 229                                 list.GetToken(parameter);
 230                         else
 231                                 parameter.clear();
 232
 233                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 234                 }
 235         }
 236 }
 237
 238 /*
 239  * add a channel to a user, creating the record for it if needed and linking
 240  * it to the user record
 241  */
 242 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 243 {
 244         if (!user || !cn)
 245                 return NULL;
 246
 247         char cname[MAXBUF];
 248         int MOD_RESULT = 0;
 249         std::string privs;
 250         Channel *Ptr;
 251
 252         /*
 253          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 254          * We restrict local users to MaxChans channels.
 255          * We restrict local operators to OperMaxChans channels.
 256          * This is a lot more logical than how it was formerly. -- w00t
 257          */
 258         if (IS_LOCAL(user) && !override)
 259         {
 260                 // Checking MyClass exists because we *may* get here with NULL, not 100% sure.
 261                 if (user->MyClass && user->MyClass->GetMaxChans())
 262                 {
 263                         if (user->chans.size() >= user->MyClass->GetMaxChans())
 264                         {
 265                                 user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 266                                 return NULL;
 267                         }
 268                 }
 269                 else
 270                 {
 271                         if (IS_OPER(user))
 272                         {
 273                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 274                                 {
 275                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 276                                         return NULL;
 277                                 }
 278                         }
 279                         else
 280                         {
 281                                 if (user->chans.size() >= Instance->Config->MaxChans)
 282                                 {
 283                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 284                                         return NULL;
 285                                 }
 286                         }
 287                 }
 288         }
 289
 290         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 291         Ptr = Instance->FindChan(cname);
 292
 293         if (!Ptr)
 294         {
 295                 /*
 296                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 297                  */
 298                 if (!IS_LOCAL(user))
 299                 {
 300                         if (!TS)
 301                                 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);
 302                 }
 303                 else
 304                 {
 305                         privs = "@";
 306                 }
 307
 308                 if (IS_LOCAL(user) && override == false)
 309                 {
 310                         MOD_RESULT = 0;
 311                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, NULL, cname, privs, key ? key : ""));
 312                         if (MOD_RESULT == 1)
 313                                 return NULL;
 314                 }
 315
 316                 Ptr = new Channel(Instance, cname, TS);
 317         }
 318         else
 319         {
 320                 /* Already on the channel */
 321                 if (Ptr->HasUser(user))
 322                         return NULL;
 323
 324                 /*
 325                  * remote users are allowed us to bypass channel modes
 326                  * and bans (used by servers)
 327                  */
 328                 if (IS_LOCAL(user) && override == false)
 329                 {
 330                         MOD_RESULT = 0;
 331                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, Ptr, cname, privs, key ? key : ""));
 332                         if (MOD_RESULT == 1)
 333                         {
 334                                 return NULL;
 335                         }
 336                         else if (MOD_RESULT == 0)
 337                         {
 338                                 std::string ckey = Ptr->GetModeParameter('k');
 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 ((!key) || ckey != key)
 346                                                 {
 347                                                         user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 348                                                         return NULL;
 349                                                 }
 350                                         }
 351                                 }
 352                                 if (Ptr->IsModeSet('i'))
 353                                 {
 354                                         MOD_RESULT = 0;
 355                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 356                                         if (!MOD_RESULT)
 357                                         {
 358                                                 if (!user->IsInvited(Ptr->name.c_str()))
 359                                                 {
 360                                                         user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 361                                                         return NULL;
 362                                                 }
 363                                         }
 364                                         user->RemoveInvite(Ptr->name.c_str());
 365                                 }
 366
 367                                 std::string limit = Ptr->GetModeParameter('l');
 368                                 if (!limit.empty())
 369                                 {
 370                                         MOD_RESULT = 0;
 371                                         FOREACH_RESULT_I(Instance, I_OnCheckLimit, OnCheckLimit(user, Ptr));
 372                                         if (!MOD_RESULT)
 373                                         {
 374                                                 long llimit = atol(limit.c_str());
 375                                                 if (Ptr->GetUserCounter() >= llimit)
 376                                                 {
 377                                                         user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 378                                                         return NULL;
 379                                                 }
 380                                         }
 381                                 }
 382
 383                                 if (Ptr->bans.size())
 384                                 {
 385                                         if (Ptr->IsBanned(user))
 386                                         {
 387                                                 user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 388                                                 return NULL;
 389                                         }
 390                                 }
 391                         }
 392                 }
 393         }
 394
 395         /* As spotted by jilles, dont bother to set this on remote users */
 396         if (IS_LOCAL(user) && Ptr->GetUserCounter() == 0)
 397                 Ptr->SetDefaultModes();
 398
 399         return Channel::ForceChan(Instance, Ptr, user, privs, bursting);
 400 }
 401
 402 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting)
 403 {
 404         std::string nick = user->nick;
 405         bool silent = false;
 406
 407         Ptr->AddUser(user);
 408
 409         /* Just in case they have no permissions */
 410         user->chans[Ptr] = 0;
 411
 412         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 413         {
 414                 const char status = *x;
 415                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 416                 if (mh)
 417                 {
 418                         /* Set, and make sure that the mode handler knows this mode was now set */
 419                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 420                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 421
 422                         switch (mh->GetPrefix())
 423                         {
 424                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 425                                  * addressing operator[] creates it. If they do exist, it points to it.
 426                                  * At all other times where we dont want to create an item if it doesnt exist, we
 427                                  * must stick to ::find().
 428                                  */
 429                                 case '@':
 430                                         user->chans[Ptr] |= UCMODE_OP;
 431                                 break;
 432                                 case '%':
 433                                         user->chans[Ptr] |= UCMODE_HOP;
 434                                 break;
 435                                 case '+':
 436                                         user->chans[Ptr] |= UCMODE_VOICE;
 437                                 break;
 438                         }
 439                 }
 440         }
 441
 442         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 443
 444         if (!silent)
 445                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 446
 447         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 448         std::string ms = Instance->Modes->ModeString(user, Ptr);
 449         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 450                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 451
 452         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 453         if (IS_LOCAL(user))
 454         {
 455                 if (Ptr->topicset)
 456                 {
 457                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 458                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 459                 }
 460                 Ptr->UserList(user);
 461         }
 462         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 463         return Ptr;
 464 }
 465
 466 bool Channel::IsBanned(User* user)
 467 {
 468         char mask[MAXBUF];
 469         int MOD_RESULT = 0;
 470         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 471
 472         if (MOD_RESULT == -1)
 473                 return true;
 474         else if (MOD_RESULT == 0)
 475         {
 476                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 477                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 478                 {
 479                         /* This allows CIDR ban matching
 480                          *
 481                          *        Full masked host                      Full unmasked host                   IP with/without CIDR
 482                          */
 483                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 484                         {
 485                                 return true;
 486                         }
 487                 }
 488         }
 489         return false;
 490 }
 491
 492 bool Channel::IsExtBanned(const std::string &str, char type)
 493 {
 494         int MOD_RESULT = 0;
 495         FOREACH_RESULT(I_OnCheckStringExtBan, OnCheckStringExtBan(str, this, type));
 496
 497         if (MOD_RESULT == -1)
 498                 return true;
 499         else if (MOD_RESULT == 0)
 500         {
 501                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 502                 {
 503                         if (i->data[0] != type || i->data[1] != ':')
 504                                 continue;
 505
 506                         // Iterate past char and : to get to the mask without doing a data copy(!)
 507                         std::string maskptr = i->data.substr(2);
 508                         ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 509
 510                         if (match(str, maskptr))
 511                                 return true;
 512                 }
 513         }
 514
 515         return false;
 516 }
 517
 518 bool Channel::IsExtBanned(User *user, char type)
 519 {
 520         int MOD_RESULT = 0;
 521         FOREACH_RESULT(I_OnCheckExtBan, OnCheckExtBan(user, this, type));
 522
 523         if (MOD_RESULT == -1)
 524                 return true;
 525         else if (MOD_RESULT == 0)
 526         {
 527                 char mask[MAXBUF];
 528                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 529
 530                 // XXX: we should probably hook cloaked hosts in here somehow too..
 531                 if (this->IsExtBanned(mask, type))
 532                         return true;
 533
 534                 if (this->IsExtBanned(user->GetFullHost(), type))
 535                         return true;
 536
 537                 if (this->IsExtBanned(user->GetFullRealHost(), type))
 538                         return true;
 539         }
 540
 541         return false;
 542 }
 543
 544 /* Channel::PartUser
 545  * remove a channel from a users record, and return the number of users left.
 546  * Therefore, if this function returns 0 the caller should delete the Channel.
 547  *
 548  * XXX: bleh, string copy of reason, fixme! -- w00t
 549  */
 550 long Channel::PartUser(User *user, std::string &reason)
 551 {
 552         bool silent = false;
 553
 554         if (!user)
 555                 return this->GetUserCounter();
 556
 557         UCListIter i = user->chans.find(this);
 558         if (i != user->chans.end())
 559         {
 560                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 561
 562                 if (!silent)
 563                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 564
 565                 user->chans.erase(i);
 566                 this->RemoveAllPrefixes(user);
 567         }
 568
 569         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 570         {
 571                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 572                 /* kill the record */
 573                 if (iter != ServerInstance->chanlist->end())
 574                 {
 575                         int MOD_RESULT = 0;
 576                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 577                         if (MOD_RESULT == 1)
 578                                 return 1; // delete halted by module
 579                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 580                         ServerInstance->chanlist->erase(iter);
 581                 }
 582                 return 0;
 583         }
 584
 585         return this->GetUserCounter();
 586 }
 587
 588 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 589 {
 590         bool silent = false;
 591
 592         if (!user || !reason)
 593                 return this->GetUserCounter();
 594
 595         if (IS_LOCAL(user))
 596         {
 597                 if (!this->HasUser(user))
 598                 {
 599                         /* Not on channel */
 600                         return this->GetUserCounter();
 601                 }
 602         }
 603
 604         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 605                 servername = ServerInstance->Config->ServerName;
 606
 607         if (triggerevents)
 608         {
 609                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 610         }
 611
 612         UCListIter i = user->chans.find(this);
 613         if (i != user->chans.end())
 614         {
 615                 if (!silent)
 616                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 617
 618                 user->chans.erase(i);
 619                 this->RemoveAllPrefixes(user);
 620         }
 621
 622         if (!this->DelUser(user))
 623         {
 624                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 625                 /* kill the record */
 626                 if (iter != ServerInstance->chanlist->end())
 627                 {
 628                         int MOD_RESULT = 0;
 629                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 630                         if (MOD_RESULT == 1)
 631                                 return 1; // delete halted by module
 632                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 633                         ServerInstance->chanlist->erase(iter);
 634                 }
 635                 return 0;
 636         }
 637
 638         return this->GetUserCounter();
 639 }
 640
 641 long Channel::KickUser(User *src, User *user, const char* reason)
 642 {
 643         bool silent = false;
 644
 645         if (!src || !user || !reason)
 646                 return this->GetUserCounter();
 647
 648         if (IS_LOCAL(src))
 649         {
 650                 if (!this->HasUser(user))
 651                 {
 652                         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());
 653                         return this->GetUserCounter();
 654                 }
 655                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 656                 {
 657                         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());
 658                         return this->GetUserCounter();
 659                 }
 660                 int MOD_RESULT = 0;
 661
 662                 if (!ServerInstance->ULine(src->server))
 663                 {
 664                         MOD_RESULT = 0;
 665                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 666                         if (MOD_RESULT == 1)
 667                                 return this->GetUserCounter();
 668                 }
 669                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 670                 if (MOD_RESULT != -1)
 671                 {
 672                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 673                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 674                                 return this->GetUserCounter();
 675
 676                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 677                         {
 678                                 int them = this->GetStatus(src);
 679                                 int us = this->GetStatus(user);
 680                                 if ((them < STATUS_HOP) || (them < us))
 681                                 {
 682                                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 683                                         return this->GetUserCounter();
 684                                 }
 685                         }
 686                 }
 687         }
 688
 689         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 690
 691         UCListIter i = user->chans.find(this);
 692         if (i != user->chans.end())
 693         {
 694                 /* zap it from the channel list of the user */
 695                 if (!silent)
 696                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 697
 698                 user->chans.erase(i);
 699                 this->RemoveAllPrefixes(user);
 700         }
 701
 702         if (!this->DelUser(user))
 703         /* if there are no users left on the channel */
 704         {
 705                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 706
 707                 /* kill the record */
 708                 if (iter != ServerInstance->chanlist->end())
 709                 {
 710                         int MOD_RESULT = 0;
 711                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 712                         if (MOD_RESULT == 1)
 713                                 return 1; // delete halted by module
 714                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 715                         ServerInstance->chanlist->erase(iter);
 716                 }
 717                 return 0;
 718         }
 719
 720         return this->GetUserCounter();
 721 }
 722
 723 void Channel::WriteChannel(User* user, const char* text, ...)
 724 {
 725         char textbuffer[MAXBUF];
 726         va_list argsPtr;
 727
 728         if (!user || !text)
 729                 return;
 730
 731         va_start(argsPtr, text);
 732         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 733         va_end(argsPtr);
 734
 735         this->WriteChannel(user, std::string(textbuffer));
 736 }
 737
 738 void Channel::WriteChannel(User* user, const std::string &text)
 739 {
 740         CUList *ulist = this->GetUsers();
 741         char tb[MAXBUF];
 742
 743         if (!user)
 744                 return;
 745
 746         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 747         std::string out = tb;
 748
 749         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 750         {
 751                 if (IS_LOCAL(i->first))
 752                         i->first->Write(out);
 753         }
 754 }
 755
 756 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 757 {
 758         char textbuffer[MAXBUF];
 759         va_list argsPtr;
 760
 761         if (!text)
 762                 return;
 763
 764         va_start(argsPtr, text);
 765         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 766         va_end(argsPtr);
 767
 768         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 769 }
 770
 771 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 772 {
 773         CUList *ulist = this->GetUsers();
 774         char tb[MAXBUF];
 775
 776         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 777         std::string out = tb;
 778
 779         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 780         {
 781                 if (IS_LOCAL(i->first))
 782                         i->first->Write(out);
 783         }
 784 }
 785
 786 /* write formatted text from a source user to all users on a channel except
 787  * for the sender (for privmsg etc) */
 788 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 789 {
 790         char textbuffer[MAXBUF];
 791         va_list argsPtr;
 792
 793         if (!text)
 794                 return;
 795
 796         va_start(argsPtr, text);
 797         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 798         va_end(argsPtr);
 799
 800         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 801 }
 802
 803 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 804 {
 805         char textbuffer[MAXBUF];
 806         va_list argsPtr;
 807
 808         if (!text)
 809                 return;
 810
 811         va_start(argsPtr, text);
 812         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 813         va_end(argsPtr);
 814
 815         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 816 }
 817
 818 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 819 {
 820         CUList *ulist = this->GetUsers();
 821         char tb[MAXBUF];
 822
 823         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 824         std::string out = tb;
 825
 826         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 827         {
 828                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 829                 {
 830                         /* User doesnt have the status we're after */
 831                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 832                                 continue;
 833
 834                         if (serversource)
 835                                 i->first->WriteServ(text);
 836                         else
 837                                 i->first->Write(out);
 838                 }
 839         }
 840 }
 841
 842 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 843 {
 844         CUList except_list;
 845         except_list[user] = user->nick;
 846         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 847 }
 848
 849 /*
 850  * return a count of the users on a specific channel accounting for
 851  * invisible users who won't increase the count. e.g. for /LIST
 852  */
 853 int Channel::CountInvisible()
 854 {
 855         int count = 0;
 856         CUList *ulist= this->GetUsers();
 857         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 858         {
 859                 if (!(i->first->IsModeSet('i')))
 860                         count++;
 861         }
 862
 863         return count;
 864 }
 865
 866 char* Channel::ChanModes(bool showkey)
 867 {
 868         static char scratch[MAXBUF];
 869         static char sparam[MAXBUF];
 870         char* offset = scratch;
 871         std::string extparam;
 872
 873         *scratch = '\0';
 874         *sparam = '\0';
 875
 876         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 877         for(int n = 0; n < 64; n++)
 878         {
 879                 if(this->modes[n])
 880                 {
 881                         *offset++ = n + 65;
 882                         extparam.clear();
 883                         switch (n)
 884                         {
 885                                 case CM_KEY:
 886                                         // Unfortunately this must be special-cased, as we definitely don't want to always display key.
 887                                         if (showkey)
 888                                         {
 889                                                 extparam = this->GetModeParameter('k');
 890                                         }
 891                                         else
 892                                         {
 893                                                 extparam = "<key>";
 894                                         }
 895                                         break;
 896                                 case CM_NOEXTERNAL:
 897                                 case CM_TOPICLOCK:
 898                                 case CM_INVITEONLY:
 899                                 case CM_MODERATED:
 900                                 case CM_SECRET:
 901                                 case CM_PRIVATE:
 902                                         /* We know these have no parameters */
 903                                 break;
 904                                 default:
 905                                         extparam = this->GetModeParameter(n + 65);
 906                                 break;
 907                         }
 908                         if (!extparam.empty())
 909                         {
 910                                 charlcat(sparam,' ',MAXBUF);
 911                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 912                         }
 913                 }
 914         }
 915
 916         /* Null terminate scratch */
 917         *offset = '\0';
 918         strlcat(scratch,sparam,MAXBUF);
 919         return scratch;
 920 }
 921
 922 /* compile a userlist of a channel into a string, each nick seperated by
 923  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 924  */
 925 void Channel::UserList(User *user, CUList *ulist)
 926 {
 927         char list[MAXBUF];
 928         size_t dlen, curlen;
 929         int MOD_RESULT = 0;
 930         bool call_modules = true;
 931
 932         if (!IS_LOCAL(user))
 933                 return;
 934
 935         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 936         if (MOD_RESULT == 1)
 937                 call_modules = false;
 938
 939         if (MOD_RESULT != -1)
 940         {
 941                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 942                 {
 943                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 944                         return;
 945                 }
 946         }
 947
 948         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 949
 950         int numusers = 0;
 951         char* ptr = list + dlen;
 952
 953         if (!ulist)
 954                 ulist = this->GetUsers();
 955
 956         /* Improvement by Brain - this doesnt change in value, so why was it inside
 957          * the loop?
 958          */
 959         bool has_user = this->HasUser(user);
 960
 961         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 962         {
 963                 if ((!has_user) && (i->first->IsModeSet('i')))
 964                 {
 965                         /*
 966                          * user is +i, and source not on the channel, does not show
 967                          * nick in NAMES list
 968                          */
 969                         continue;
 970                 }
 971
 972                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 973                         continue;
 974
 975                 std::string prefixlist = this->GetPrefixChar(i->first);
 976                 std::string nick = i->first->nick;
 977
 978                 if (call_modules)
 979                 {
 980                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 981
 982                         /* Nick was nuked, a module wants us to skip it */
 983                         if (nick.empty())
 984                                 continue;
 985                 }
 986
 987                 size_t ptrlen = 0;
 988
 989                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 990                 {
 991                         /* list overflowed into multiple numerics */
 992                         user->WriteServ(std::string(list));
 993
 994                         /* reset our lengths */
 995                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 996                         ptr = list + dlen;
 997
 998                         ptrlen = 0;
 999                         numusers = 0;
1000                 }
1001
1002                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
1003
1004                 curlen += ptrlen;
1005                 ptr += ptrlen;
1006
1007                 numusers++;
1008         }
1009
1010         /* if whats left in the list isnt empty, send it */
1011         if (numusers)
1012         {
1013                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
1014         }
1015
1016         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
1017 }
1018
1019 long Channel::GetMaxBans()
1020 {
1021         /* Return the cached value if there is one */
1022         if (this->maxbans)
1023                 return this->maxbans;
1024
1025         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
1026         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
1027         {
1028                 if (match(this->name,n->first))
1029                 {
1030                         this->maxbans = n->second;
1031                         return n->second;
1032                 }
1033         }
1034
1035         /* Screw it, just return the default of 64 */
1036         this->maxbans = 64;
1037         return this->maxbans;
1038 }
1039
1040 void Channel::ResetMaxBans()
1041 {
1042         this->maxbans = 0;
1043 }
1044
1045 /* returns the status character for a given user on a channel, e.g. @ for op,
1046  * % for halfop etc. If the user has several modes set, the highest mode
1047  * the user has must be returned.
1048  */
1049 const char* Channel::GetPrefixChar(User *user)
1050 {
1051         static char pf[2] = {0, 0};
1052
1053         prefixlist::iterator n = prefixes.find(user);
1054         if (n != prefixes.end())
1055         {
1056                 if (n->second.size())
1057                 {
1058                         /* If the user has any prefixes, their highest prefix
1059                          * will always be at the head of the list, as the list is
1060                          * sorted in rank order highest first (see SetPrefix()
1061                          * for reasons why)
1062                          */
1063                         *pf = n->second.begin()->first;
1064                         return pf;
1065                 }
1066         }
1067
1068         *pf = 0;
1069         return pf;
1070 }
1071
1072
1073 const char* Channel::GetAllPrefixChars(User* user)
1074 {
1075         static char prefix[MAXBUF];
1076         int ctr = 0;
1077         *prefix = 0;
1078
1079         prefixlist::iterator n = prefixes.find(user);
1080         if (n != prefixes.end())
1081         {
1082                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1083                 {
1084                         prefix[ctr++] = x->first;
1085                 }
1086         }
1087
1088         prefix[ctr] = 0;
1089
1090         return prefix;
1091 }
1092
1093 unsigned int Channel::GetPrefixValue(User* user)
1094 {
1095         prefixlist::iterator n = prefixes.find(user);
1096         if (n != prefixes.end())
1097         {
1098                 if (n->second.size())
1099                         return n->second.begin()->second;
1100         }
1101         return 0;
1102 }
1103
1104 int Channel::GetStatusFlags(User *user)
1105 {
1106         UCListIter i = user->chans.find(this);
1107         if (i != user->chans.end())
1108         {
1109                 return i->second;
1110         }
1111         return 0;
1112 }
1113
1114 int Channel::GetStatus(User *user)
1115 {
1116         if (ServerInstance->ULine(user->server))
1117                 return STATUS_OP;
1118
1119         UCListIter i = user->chans.find(this);
1120         if (i != user->chans.end())
1121         {
1122                 if ((i->second & UCMODE_OP) > 0)
1123                 {
1124                         return STATUS_OP;
1125                 }
1126                 if ((i->second & UCMODE_HOP) > 0)
1127                 {
1128                         return STATUS_HOP;
1129                 }
1130                 if ((i->second & UCMODE_VOICE) > 0)
1131                 {
1132                         return STATUS_VOICE;
1133                 }
1134                 return STATUS_NORMAL;
1135         }
1136         return STATUS_NORMAL;
1137 }
1138
1139 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1140 {
1141         prefixlist::iterator n = prefixes.find(user);
1142         prefixtype pfx = std::make_pair(prefix,prefix_value);
1143         if (adding)
1144         {
1145                 if (n != prefixes.end())
1146                 {
1147                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1148                         {
1149                                 n->second.push_back(pfx);
1150                                 /* We must keep prefixes in rank order, largest first.
1151                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1152                                  * state, and secondly it turns out to be a benefit to us later.
1153                                  * See above in GetPrefix().
1154                                  */
1155                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1156                         }
1157                 }
1158                 else
1159                 {
1160                         pfxcontainer one;
1161                         one.push_back(pfx);
1162                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1163                 }
1164         }
1165         else
1166         {
1167                 if (n != prefixes.end())
1168                 {
1169                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1170                         if (x != n->second.end())
1171                                 n->second.erase(x);
1172                 }
1173         }
1174 }
1175
1176 void Channel::RemoveAllPrefixes(User* user)
1177 {
1178         prefixlist::iterator n = prefixes.find(user);
1179         if (n != prefixes.end())
1180         {
1181                 prefixes.erase(n);
1182         }
1183 }
1184