src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 #include <stdarg.h>
  15 #include "configreader.h"
  16 #include "inspircd.h"
  17 #include "users.h"
  18 #include "modules.h"
  19 #include "wildcard.h"
  20 #include "mode.h"
  21
  22 chanrec::chanrec(InspIRCd* Instance) : ServerInstance(Instance)
  23 {
  24         *name = *topic = *setby = *key = 0;
  25         maxbans = created = topicset = limit = 0;
  26         memset(&modes,0,64);
  27         age = ServerInstance->Time(true);
  28 }
  29
  30 void chanrec::SetMode(char mode,bool mode_on)
  31 {
  32         modes[mode-65] = mode_on;
  33         if (!mode_on)
  34                 this->SetModeParam(mode,"",false);
  35 }
  36
  37
  38 void chanrec::SetModeParam(char mode,const char* parameter,bool mode_on)
  39 {
  40         CustomModeList::iterator n = custom_mode_params.find(mode);
  41
  42         if (mode_on)
  43         {
  44                 if (n == custom_mode_params.end())
  45                         custom_mode_params[mode] = strdup(parameter);
  46         }
  47         else
  48         {
  49                 if (n != custom_mode_params.end())
  50                 {
  51                         free(n->second);
  52                         custom_mode_params.erase(n);
  53                 }
  54         }
  55 }
  56
  57 bool chanrec::IsModeSet(char mode)
  58 {
  59         return modes[mode-65];
  60 }
  61
  62 std::string chanrec::GetModeParameter(char mode)
  63 {
  64         switch (mode)
  65         {
  66                 case 'k':
  67                         return this->key;
  68                 case 'l':
  69                         return ConvToStr(this->limit);
  70                 default:
  71                         CustomModeList::iterator n = custom_mode_params.find(mode);
  72                         if (n != custom_mode_params.end())
  73                                 return n->second;
  74                         return "";
  75                 break;
  76         }
  77 }
  78
  79 long chanrec::GetUserCounter()
  80 {
  81         return (this->internal_userlist.size());
  82 }
  83
  84 void chanrec::AddUser(userrec* user)
  85 {
  86         internal_userlist[user] = user;
  87 }
  88
  89 unsigned long chanrec::DelUser(userrec* user)
  90 {
  91         CUListIter a = internal_userlist.find(user);
  92
  93         if (a != internal_userlist.end())
  94         {
  95                 internal_userlist.erase(a);
  96                 /* And tidy any others... */
  97                 DelOppedUser(user);
  98                 DelHalfoppedUser(user);
  99                 DelVoicedUser(user);
 100         }
 101
 102         return internal_userlist.size();
 103 }
 104
 105 bool chanrec::HasUser(userrec* user)
 106 {
 107         return (internal_userlist.find(user) != internal_userlist.end());
 108 }
 109
 110 void chanrec::AddOppedUser(userrec* user)
 111 {
 112         internal_op_userlist[user] = user;
 113 }
 114
 115 void chanrec::DelOppedUser(userrec* user)
 116 {
 117         CUListIter a = internal_op_userlist.find(user);
 118         if (a != internal_op_userlist.end())
 119         {
 120                 internal_op_userlist.erase(a);
 121                 return;
 122         }
 123 }
 124
 125 void chanrec::AddHalfoppedUser(userrec* user)
 126 {
 127         internal_halfop_userlist[user] = user;
 128 }
 129
 130 void chanrec::DelHalfoppedUser(userrec* user)
 131 {
 132         CUListIter a = internal_halfop_userlist.find(user);
 133
 134         if (a != internal_halfop_userlist.end())
 135         {
 136                 internal_halfop_userlist.erase(a);
 137         }
 138 }
 139
 140 void chanrec::AddVoicedUser(userrec* user)
 141 {
 142         internal_voice_userlist[user] = user;
 143 }
 144
 145 void chanrec::DelVoicedUser(userrec* user)
 146 {
 147         CUListIter a = internal_voice_userlist.find(user);
 148
 149         if (a != internal_voice_userlist.end())
 150         {
 151                 internal_voice_userlist.erase(a);
 152         }
 153 }
 154
 155 CUList* chanrec::GetUsers()
 156 {
 157         return &internal_userlist;
 158 }
 159
 160 CUList* chanrec::GetOppedUsers()
 161 {
 162         return &internal_op_userlist;
 163 }
 164
 165 CUList* chanrec::GetHalfoppedUsers()
 166 {
 167         return &internal_halfop_userlist;
 168 }
 169
 170 CUList* chanrec::GetVoicedUsers()
 171 {
 172         return &internal_voice_userlist;
 173 }
 174
 175 /*
 176  * add a channel to a user, creating the record for it if needed and linking
 177  * it to the user record
 178  */
 179 chanrec* chanrec::JoinUser(InspIRCd* Instance, userrec *user, const char* cn, bool override, const char* key)
 180 {
 181         if (!user || !cn)
 182                 return NULL;
 183
 184         bool new_channel = false;
 185         char cname[MAXBUF];
 186         int MOD_RESULT = 0;
 187         strlcpy(cname,cn,CHANMAX);
 188
 189         std::string privs;
 190
 191         chanrec* Ptr = Instance->FindChan(cname);
 192
 193         if (!Ptr)
 194         {
 195                 privs = "@";
 196
 197                 if (IS_LOCAL(user) && override == false)
 198                 {
 199                         MOD_RESULT = 0;
 200                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname,privs));
 201                         if (MOD_RESULT == 1)
 202                                 return NULL;
 203                 }
 204
 205                 /* create a new one */
 206                 Ptr = new chanrec(Instance);
 207                 (*(Instance->chanlist))[cname] = Ptr;
 208
 209                 strlcpy(Ptr->name, cname,CHANMAX);
 210
 211                 /* As spotted by jilles, dont bother to set this on remote users */
 212                 if (IS_LOCAL(user))
 213                         Ptr->modes[CM_TOPICLOCK] = Ptr->modes[CM_NOEXTERNAL] = 1;
 214
 215                 Ptr->created = Instance->Time();
 216                 *Ptr->topic = 0;
 217                 *Ptr->setby = 0;
 218                 Ptr->topicset = 0;
 219                 new_channel = true;
 220         }
 221         else
 222         {
 223                 /* Already on the channel */
 224                 if (Ptr->HasUser(user))
 225                         return NULL;
 226
 227                 /*
 228                  * remote users are allowed us to bypass channel modes
 229                  * and bans (used by servers)
 230                  */
 231                 if (IS_LOCAL(user) && override == false)
 232                 {
 233                         MOD_RESULT = 0;
 234                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname,privs));
 235                         if (MOD_RESULT == 1)
 236                         {
 237                                 return NULL;
 238                         }
 239                         else if (MOD_RESULT == 0)
 240                         {
 241                                 if (*Ptr->key)
 242                                 {
 243                                         MOD_RESULT = 0;
 244                                         FOREACH_RESULT_I(Instance,I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 245                                         if (!MOD_RESULT)
 246                                         {
 247                                                 if ((!key) || strcmp(key,Ptr->key))
 248                                                 {
 249                                                         user->WriteServ("475 %s %s :Cannot join channel (Incorrect channel key)",user->nick, Ptr->name);
 250                                                         return NULL;
 251                                                 }
 252                                         }
 253                                 }
 254                                 if (Ptr->modes[CM_INVITEONLY])
 255                                 {
 256                                         MOD_RESULT = 0;
 257                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 258                                         if (!MOD_RESULT)
 259                                         {
 260                                                 if (user->IsInvited(Ptr->name))
 261                                                 {
 262                                                         /* user was invited to channel */
 263                                                         /* there may be an optional channel NOTICE here */
 264                                                 }
 265                                                 else
 266                                                 {
 267                                                         user->WriteServ("473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 268                                                         return NULL;
 269                                                 }
 270                                         }
 271                                         user->RemoveInvite(Ptr->name);
 272                                 }
 273                                 if (Ptr->limit)
 274                                 {
 275                                         MOD_RESULT = 0;
 276                                         FOREACH_RESULT_I(Instance,I_OnCheckLimit,OnCheckLimit(user, Ptr));
 277                                         if (!MOD_RESULT)
 278                                         {
 279                                                 if (Ptr->GetUserCounter() >= Ptr->limit)
 280                                                 {
 281                                                         user->WriteServ("471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 282                                                         return NULL;
 283                                                 }
 284                                         }
 285                                 }
 286                                 if (Ptr->bans.size())
 287                                 {
 288                                         if (Ptr->IsBanned(user))
 289                                         {
 290                                                 user->WriteServ("474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 291                                                 return NULL;
 292                                         }
 293                                 }
 294                         }
 295                 }
 296         }
 297
 298         /* NOTE: If the user is an oper here, we can extend their user->chans by up to
 299          * OPERMAXCHANS. For remote users which are not bound by the channel limits,
 300          * we can extend infinitely. Otherwise, nope, youre restricted to MAXCHANS.
 301          */
 302         if (!IS_LOCAL(user) || override == true) /* was a check on fd < 0 */
 303         {
 304                 return chanrec::ForceChan(Instance, Ptr, user, privs);
 305         }
 306         else if (*user->oper)
 307         {
 308                 /* Oper allows extension up to the OPERMAXCHANS value */
 309                 if (user->chans.size() < OPERMAXCHANS)
 310                 {
 311                         return chanrec::ForceChan(Instance, Ptr, user, privs);
 312                 }
 313         }
 314         else if (user->chans.size() < MAXCHANS)
 315         {
 316                 return chanrec::ForceChan(Instance, Ptr, user, privs);
 317         }
 318
 319
 320         user->WriteServ("405 %s %s :You are on too many channels",user->nick, cname);
 321
 322         if (new_channel)
 323         {
 324                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 325                 chan_hash::iterator n = Instance->chanlist->find(cname);
 326                 if (n != Instance->chanlist->end())
 327                 {
 328                         Ptr->DelUser(user);
 329                         DELETE(Ptr);
 330                         Instance->chanlist->erase(n);
 331                 }
 332         }
 333
 334         return NULL;
 335 }
 336
 337 chanrec* chanrec::ForceChan(InspIRCd* Instance, chanrec* Ptr, userrec* user, const std::string &privs)
 338 {
 339         userrec* dummyuser = new userrec(Instance);
 340         std::string nick = user->nick;
 341
 342         dummyuser->SetFd(FD_MAGIC_NUMBER);
 343         Ptr->AddUser(user);
 344
 345         /* Just in case they have no permissions */
 346         user->chans[Ptr] = 0;
 347
 348         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 349         {
 350                 const char status = *x;
 351                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 352                 if (mh)
 353                 {
 354                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 355                         /* Make sure that the mode handler knows this mode was now set */
 356                         mh->OnModeChange(dummyuser, dummyuser, Ptr, nick, true);
 357
 358                         switch (mh->GetPrefix())
 359                         {
 360                                 /* These logic ops are SAFE IN THIS CASE
 361                                  * because if the entry doesnt exist,
 362                                  * addressing operator[] creates it.
 363                                  * If they do exist, it points to it.
 364                                  * At all other times where we dont want
 365                                  * to create an item if it doesnt exist, we
 366                                  * must stick to ::find().
 367                                  */
 368                                 case '@':
 369                                         user->chans[Ptr] |= UCMODE_OP;
 370                                 break;
 371                                 case '%':
 372                                         user->chans[Ptr] |= UCMODE_HOP;
 373                                 break;
 374                                 case '+':
 375                                         user->chans[Ptr] |= UCMODE_VOICE;
 376                                 break;
 377                         }
 378                 }
 379         }
 380
 381         delete dummyuser;
 382
 383         Ptr->WriteChannel(user,"JOIN :%s",Ptr->name);
 384
 385         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 386         std::string ms = Instance->Modes->ModeString(user, Ptr);
 387         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 388                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name, ms.c_str());
 389
 390         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 391         if (IS_LOCAL(user))
 392         {
 393                 if (Ptr->topicset)
 394                 {
 395                         user->WriteServ("332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 396                         user->WriteServ("333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 397                 }
 398                 Ptr->UserList(user);
 399         }
 400         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user,Ptr));
 401         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user,Ptr));
 402         return Ptr;
 403 }
 404
 405 bool chanrec::IsBanned(userrec* user)
 406 {
 407         char mask[MAXBUF];
 408         int MOD_RESULT = 0;
 409         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 410         if (!MOD_RESULT)
 411         {
 412                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 413                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 414                 {
 415                         /* This allows CIDR ban matching
 416                          *
 417                          *        Full masked host                      Full unmasked host                   IP with/without CIDR
 418                          */
 419                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 420                         {
 421                                 return true;
 422                         }
 423                 }
 424         }
 425         return false;
 426 }
 427
 428 /* chanrec::PartUser
 429  * remove a channel from a users record, and return the number of users left.
 430  * Therefore, if this function returns 0 the caller should delete the chanrec.
 431  */
 432 long chanrec::PartUser(userrec *user, const char* reason)
 433 {
 434         if (!user)
 435                 return this->GetUserCounter();
 436
 437         UCListIter i = user->chans.find(this);
 438         if (i != user->chans.end())
 439         {
 440                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason ? reason : ""));
 441                 this->WriteChannel(user, "PART %s%s%s", this->name, reason ? " :" : "", reason ? reason : "");
 442                 user->chans.erase(i);
 443                 this->RemoveAllPrefixes(user);
 444         }
 445
 446         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 447         {
 448                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 449                 /* kill the record */
 450                 if (iter != ServerInstance->chanlist->end())
 451                 {
 452                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 453                         ServerInstance->chanlist->erase(iter);
 454                 }
 455                 return 0;
 456         }
 457
 458         return this->GetUserCounter();
 459 }
 460
 461 long chanrec::ServerKickUser(userrec* user, const char* reason, bool triggerevents)
 462 {
 463         if (!user || !reason)
 464                 return this->GetUserCounter();
 465
 466         if (IS_LOCAL(user))
 467         {
 468                 if (!this->HasUser(user))
 469                 {
 470                         /* Not on channel */
 471                         return this->GetUserCounter();
 472                 }
 473         }
 474
 475         if (triggerevents)
 476         {
 477                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,this,reason));
 478         }
 479
 480         UCListIter i = user->chans.find(this);
 481         if (i != user->chans.end())
 482         {
 483                 this->WriteChannelWithServ(ServerInstance->Config->ServerName, "KICK %s %s :%s", this->name, user->nick, reason);
 484                 user->chans.erase(i);
 485                 this->RemoveAllPrefixes(user);
 486         }
 487
 488         if (!this->DelUser(user))
 489         {
 490                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 491                 /* kill the record */
 492                 if (iter != ServerInstance->chanlist->end())
 493                 {
 494                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 495                         ServerInstance->chanlist->erase(iter);
 496                 }
 497                 return 0;
 498         }
 499
 500         return this->GetUserCounter();
 501 }
 502
 503 long chanrec::KickUser(userrec *src, userrec *user, const char* reason)
 504 {
 505         if (!src || !user || !reason)
 506                 return this->GetUserCounter();
 507
 508         if (IS_LOCAL(src))
 509         {
 510                 if (!this->HasUser(user))
 511                 {
 512                         src->WriteServ("441 %s %s %s :They are not on that channel",src->nick, user->nick, this->name);
 513                         return this->GetUserCounter();
 514                 }
 515                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 516                 {
 517                         src->WriteServ("482 %s %s :Only a u-line may kick a u-line from a channel.",src->nick, this->name);
 518                         return this->GetUserCounter();
 519                 }
 520                 int MOD_RESULT = 0;
 521
 522                 if (!ServerInstance->ULine(src->server))
 523                 {
 524                         MOD_RESULT = 0;
 525                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 526                         if (MOD_RESULT == 1)
 527                                 return this->GetUserCounter();
 528                 }
 529                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 530                 if (MOD_RESULT != -1)
 531                 {
 532                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 533                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 534                                 return this->GetUserCounter();
 535
 536                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 537                         {
 538                                 int them = this->GetStatus(src);
 539                                 int us = this->GetStatus(user);
 540                                 if ((them < STATUS_HOP) || (them < us))
 541                                 {
 542                                         src->WriteServ("482 %s %s :You must be a channel %soperator",src->nick, this->name, them == STATUS_HOP ? "" : "half-");
 543                                         return this->GetUserCounter();
 544                                 }
 545                         }
 546                 }
 547         }
 548
 549         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,this,reason));
 550
 551         UCListIter i = user->chans.find(this);
 552         if (i != user->chans.end())
 553         {
 554                 /* zap it from the channel list of the user */
 555                 this->WriteChannel(src, "KICK %s %s :%s", this->name, user->nick, reason);
 556                 user->chans.erase(i);
 557                 this->RemoveAllPrefixes(user);
 558         }
 559
 560         if (!this->DelUser(user))
 561         /* if there are no users left on the channel */
 562         {
 563                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 564
 565                 /* kill the record */
 566                 if (iter != ServerInstance->chanlist->end())
 567                 {
 568                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(this));
 569                         ServerInstance->chanlist->erase(iter);
 570                 }
 571                 return 0;
 572         }
 573
 574         return this->GetUserCounter();
 575 }
 576
 577 void chanrec::WriteChannel(userrec* user, char* text, ...)
 578 {
 579         char textbuffer[MAXBUF];
 580         va_list argsPtr;
 581
 582         if (!user || !text)
 583                 return;
 584
 585         va_start(argsPtr, text);
 586         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 587         va_end(argsPtr);
 588
 589         this->WriteChannel(user, std::string(textbuffer));
 590 }
 591
 592 void chanrec::WriteChannel(userrec* user, const std::string &text)
 593 {
 594         CUList *ulist = this->GetUsers();
 595         char tb[MAXBUF];
 596
 597         if (!user)
 598                 return;
 599
 600         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 601         std::string out = tb;
 602
 603         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 604         {
 605                 if (IS_LOCAL(i->second))
 606                         i->second->Write(out);
 607         }
 608 }
 609
 610 void chanrec::WriteChannelWithServ(const char* ServName, const char* text, ...)
 611 {
 612         char textbuffer[MAXBUF];
 613         va_list argsPtr;
 614
 615         if (!text)
 616                 return;
 617
 618         va_start(argsPtr, text);
 619         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 620         va_end(argsPtr);
 621
 622         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 623 }
 624
 625 void chanrec::WriteChannelWithServ(const char* ServName, const std::string &text)
 626 {
 627         CUList *ulist = this->GetUsers();
 628         char tb[MAXBUF];
 629
 630         snprintf(tb,MAXBUF,":%s %s",ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 631         std::string out = tb;
 632
 633         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 634         {
 635                 if (IS_LOCAL(i->second))
 636                         i->second->Write(out);
 637         }
 638 }
 639
 640 /* write formatted text from a source user to all users on a channel except
 641  * for the sender (for privmsg etc) */
 642 void chanrec::WriteAllExceptSender(userrec* user, bool serversource, char status, char* text, ...)
 643 {
 644         char textbuffer[MAXBUF];
 645         va_list argsPtr;
 646
 647         if (!text)
 648                 return;
 649
 650         va_start(argsPtr, text);
 651         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 652         va_end(argsPtr);
 653
 654         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 655 }
 656
 657 void chanrec::WriteAllExcept(userrec* user, bool serversource, char status, CUList &except_list, char* text, ...)
 658 {
 659         char textbuffer[MAXBUF];
 660         va_list argsPtr;
 661
 662         if (!text)
 663                 return;
 664
 665         va_start(argsPtr, text);
 666         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 667         va_end(argsPtr);
 668
 669         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 670 }
 671
 672 void chanrec::WriteAllExcept(userrec* user, bool serversource, char status, CUList &except_list, const std::string &text)
 673 {
 674         CUList *ulist;
 675         char tb[MAXBUF];
 676
 677         switch (status)
 678         {
 679                 case '@':
 680                         ulist = this->GetOppedUsers();
 681                         break;
 682                 case '%':
 683                         ulist = this->GetHalfoppedUsers();
 684                         break;
 685                 case '+':
 686                         ulist = this->GetVoicedUsers();
 687                         break;
 688                 default:
 689                         ulist = this->GetUsers();
 690                         break;
 691         }
 692
 693         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 694         std::string out = tb;
 695
 696         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 697         {
 698                 if ((IS_LOCAL(i->second)) && (except_list.find(i->second) == except_list.end()))
 699                 {
 700                         if (serversource)
 701                                 i->second->WriteServ(text);
 702                         else
 703                                 i->second->Write(out);
 704                 }
 705         }
 706 }
 707
 708 void chanrec::WriteAllExceptSender(userrec* user, bool serversource, char status, const std::string& text)
 709 {
 710         CUList except_list;
 711         except_list[user] = user;
 712         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 713 }
 714
 715 /*
 716  * return a count of the users on a specific channel accounting for
 717  * invisible users who won't increase the count. e.g. for /LIST
 718  */
 719 int chanrec::CountInvisible()
 720 {
 721         int count = 0;
 722         CUList *ulist= this->GetUsers();
 723         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 724         {
 725                 if (!(i->second->modes[UM_INVISIBLE]))
 726                         count++;
 727         }
 728
 729         return count;
 730 }
 731
 732 char* chanrec::ChanModes(bool showkey)
 733 {
 734         static char scratch[MAXBUF];
 735         static char sparam[MAXBUF];
 736         char* offset = scratch;
 737         std::string extparam;
 738
 739         *scratch = '\0';
 740         *sparam = '\0';
 741
 742         /* This was still iterating up to 190, chanrec::modes is only 64 elements -- Om */
 743         for(int n = 0; n < 64; n++)
 744         {
 745                 if(this->modes[n])
 746                 {
 747                         *offset++ = n + 65;
 748                         extparam = "";
 749                         switch (n)
 750                         {
 751                                 case CM_KEY:
 752                                         extparam = (showkey ? this->key : "<key>");
 753                                 break;
 754                                 case CM_LIMIT:
 755                                         extparam = ConvToStr(this->limit);
 756                                 break;
 757                                 case CM_NOEXTERNAL:
 758                                 case CM_TOPICLOCK:
 759                                 case CM_INVITEONLY:
 760                                 case CM_MODERATED:
 761                                 case CM_SECRET:
 762                                 case CM_PRIVATE:
 763                                         /* We know these have no parameters */
 764                                 break;
 765                                 default:
 766                                         extparam = this->GetModeParameter(n + 65);
 767                                 break;
 768                         }
 769                         if (extparam != "")
 770                         {
 771                                 charlcat(sparam,' ',MAXBUF);
 772                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 773                         }
 774                 }
 775         }
 776
 777         /* Null terminate scratch */
 778         *offset = '\0';
 779         strlcat(scratch,sparam,MAXBUF);
 780         return scratch;
 781 }
 782
 783 /* compile a userlist of a channel into a string, each nick seperated by
 784  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 785  */
 786 void chanrec::UserList(userrec *user)
 787 {
 788         char list[MAXBUF];
 789         size_t dlen, curlen;
 790         int MOD_RESULT = 0;
 791
 792         if (!IS_LOCAL(user))
 793                 return;
 794
 795         FOREACH_RESULT(I_OnUserList,OnUserList(user, this));
 796         if (MOD_RESULT == 1)
 797                 return;
 798
 799         dlen = curlen = snprintf(list,MAXBUF,"353 %s = %s :", user->nick, this->name);
 800
 801         int numusers = 0;
 802         char* ptr = list + dlen;
 803
 804         CUList *ulist= this->GetUsers();
 805
 806         /* Improvement by Brain - this doesnt change in value, so why was it inside
 807          * the loop?
 808          */
 809         bool has_user = this->HasUser(user);
 810
 811         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 812         {
 813                 if ((!has_user) && (i->second->modes[UM_INVISIBLE]))
 814                 {
 815                         /*
 816                          * user is +i, and source not on the channel, does not show
 817                          * nick in NAMES list
 818                          */
 819                         continue;
 820                 }
 821
 822                 size_t ptrlen = snprintf(ptr, MAXBUF, "%s%s ", this->GetPrefixChar(i->second), i->second->nick);
 823
 824                 curlen += ptrlen;
 825                 ptr += ptrlen;
 826
 827                 numusers++;
 828
 829                 if (curlen > (480-NICKMAX))
 830                 {
 831                         /* list overflowed into multiple numerics */
 832                         user->WriteServ(std::string(list));
 833
 834                         /* reset our lengths */
 835                         dlen = curlen = snprintf(list,MAXBUF,"353 %s = %s :", user->nick, this->name);
 836                         ptr = list + dlen;
 837
 838                         ptrlen = 0;
 839                         numusers = 0;
 840                 }
 841         }
 842
 843         /* if whats left in the list isnt empty, send it */
 844         if (numusers)
 845         {
 846                 user->WriteServ(std::string(list));
 847         }
 848
 849         user->WriteServ("366 %s %s :End of /NAMES list.", user->nick, this->name);
 850 }
 851
 852 long chanrec::GetMaxBans()
 853 {
 854         /* Return the cached value if there is one */
 855         if (this->maxbans)
 856                 return this->maxbans;
 857
 858         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 859         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 860         {
 861                 if (match(this->name,n->first.c_str()))
 862                 {
 863                         this->maxbans = n->second;
 864                         return n->second;
 865                 }
 866         }
 867
 868         /* Screw it, just return the default of 64 */
 869         this->maxbans = 64;
 870         return this->maxbans;
 871 }
 872
 873 void chanrec::ResetMaxBans()
 874 {
 875         this->maxbans = 0;
 876 }
 877
 878 /* returns the status character for a given user on a channel, e.g. @ for op,
 879  * % for halfop etc. If the user has several modes set, the highest mode
 880  * the user has must be returned.
 881  */
 882 const char* chanrec::GetPrefixChar(userrec *user)
 883 {
 884         static char pf[2] = {0, 0};
 885
 886         prefixlist::iterator n = prefixes.find(user);
 887         if (n != prefixes.end())
 888         {
 889                 if (n->second.size())
 890                 {
 891                         /* If the user has any prefixes, their highest prefix
 892                          * will always be at the head of the list, as the list is
 893                          * sorted in rank order highest first (see SetPrefix()
 894                          * for reasons why)
 895                          */
 896                         *pf = n->second.begin()->first;
 897                         return pf;
 898                 }
 899         }
 900
 901         *pf = 0;
 902         return pf;
 903 }
 904
 905 const char* chanrec::GetAllPrefixChars(userrec* user)
 906 {
 907         static char prefix[MAXBUF];
 908         int ctr = 0;
 909         *prefix = 0;
 910
 911         prefixlist::iterator n = prefixes.find(user);
 912         if (n != prefixes.end())
 913         {
 914                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
 915                 {
 916                         prefix[ctr++] = x->first;
 917                 }
 918         }
 919
 920         prefix[ctr] = 0;
 921
 922         return prefix;
 923 }
 924
 925 unsigned int chanrec::GetPrefixValue(userrec* user)
 926 {
 927         prefixlist::iterator n = prefixes.find(user);
 928         if (n != prefixes.end())
 929         {
 930                 if (n->second.size())
 931                         return n->second.begin()->second;
 932         }
 933         return 0;
 934 }
 935
 936 int chanrec::GetStatusFlags(userrec *user)
 937 {
 938         UCListIter i = user->chans.find(this);
 939         if (i != user->chans.end())
 940         {
 941                 return i->second;
 942         }
 943         return 0;
 944 }
 945
 946 int chanrec::GetStatus(userrec *user)
 947 {
 948         if (ServerInstance->ULine(user->server))
 949                 return STATUS_OP;
 950
 951         UCListIter i = user->chans.find(this);
 952         if (i != user->chans.end())
 953         {
 954                 if ((i->second & UCMODE_OP) > 0)
 955                 {
 956                         return STATUS_OP;
 957                 }
 958                 if ((i->second & UCMODE_HOP) > 0)
 959                 {
 960                         return STATUS_HOP;
 961                 }
 962                 if ((i->second & UCMODE_VOICE) > 0)
 963                 {
 964                         return STATUS_VOICE;
 965                 }
 966                 return STATUS_NORMAL;
 967         }
 968         return STATUS_NORMAL;
 969 }
 970
 971 void chanrec::SetPrefix(userrec* user, char prefix, unsigned int prefix_value, bool adding)
 972 {
 973         prefixlist::iterator n = prefixes.find(user);
 974         prefixtype pfx = std::make_pair(prefix,prefix_value);
 975         if (adding)
 976         {
 977                 if (n != prefixes.end())
 978                 {
 979                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
 980                         {
 981                                 n->second.push_back(pfx);
 982                                 /* We must keep prefixes in rank order, largest first.
 983                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
 984                                  * state, and secondly it turns out to be a benefit to us later.
 985                                  * See above in GetPrefix().
 986                                  */
 987                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
 988                         }
 989                 }
 990                 else
 991                 {
 992                         pfxcontainer one;
 993                         one.push_back(pfx);
 994                         prefixes.insert(std::make_pair<userrec*,pfxcontainer>(user, one));
 995                 }
 996         }
 997         else
 998         {
 999                 if (n != prefixes.end())
1000                 {
1001                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1002                         if (x != n->second.end())
1003                                 n->second.erase(x);
1004                 }
1005         }
1006 }
1007
1008 void chanrec::RemoveAllPrefixes(userrec* user)
1009 {
1010         prefixlist::iterator n = prefixes.find(user);
1011         if (n != prefixes.end())
1012         {
1013                 prefixes.erase(n);
1014         }
1015 }
1016