src/channels.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *   E-mail:
   7  *        <brain@chatspike.net>
   8  *        <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *      the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <string>
  20 #include <map>
  21 #include <sstream>
  22 #include <vector>
  23 #include <deque>
  24 #include "configreader.h"
  25 #include "inspircd.h"
  26 #include "hash_map.h"
  27 #include "users.h"
  28 #include "ctables.h"
  29 #include "globals.h"
  30 #include "modules.h"
  31 #include "dynamic.h"
  32 #include "commands.h"
  33 #include "wildcard.h"
  34 #include "message.h"
  35 #include "mode.h"
  36 #include "xline.h"
  37 #include "inspstring.h"
  38 #include "helperfuncs.h"
  39 #include "typedefs.h"
  40
  41 extern ServerConfig* Config;
  42
  43 extern int MODCOUNT;
  44 extern std::vector<Module*> modules;
  45 extern std::vector<ircd_module*> factory;
  46 extern time_t TIME;
  47 extern chan_hash chanlist;
  48
  49
  50 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created);
  51
  52 chanrec::chanrec()
  53 {
  54         *name = *topic = *setby = *key = 0;
  55         created = topicset = limit = 0;
  56         internal_userlist.clear();
  57         memset(&modes,0,64);
  58 }
  59
  60 void chanrec::SetCustomMode(char mode,bool mode_on)
  61 {
  62         modes[mode-65] = mode_on;
  63         if (!mode_on)
  64                 this->SetCustomModeParam(mode,"",false);
  65 }
  66
  67
  68 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
  69 {
  70         log(DEBUG,"SetCustomModeParam called");
  71
  72         CustomModeList::iterator n = custom_mode_params.find(mode);
  73
  74         if (mode_on)
  75         {
  76                 if (n == custom_mode_params.end())
  77                 {
  78                         custom_mode_params[mode] = strdup(parameter);
  79                         log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
  80                 }
  81                 else
  82                 {
  83                         log(DEBUG, "Tried to set custom mode parameter for %c '%s' when it was already '%s'", mode, parameter, n->second);
  84                 }
  85         }
  86         else
  87         {
  88                 if (n != custom_mode_params.end())
  89                 {
  90                         free(n->second);
  91                         custom_mode_params.erase(n);
  92                 }
  93         }
  94 }
  95
  96 bool chanrec::IsModeSet(char mode)
  97 {
  98         return modes[mode-65];
  99 }
 100
 101 std::string chanrec::GetModeParameter(char mode)
 102 {
 103         if (mode == 'k')
 104         {
 105                 return this->key;
 106         }
 107         else if (mode == 'l')
 108         {
 109                 return ConvToStr(this->limit);
 110         }
 111         else
 112         {
 113                 CustomModeList::iterator n = custom_mode_params.find(mode);
 114                 if (n != custom_mode_params.end())
 115                 {
 116                         return n->second;
 117                 }
 118                 return "";
 119         }
 120 }
 121
 122 long chanrec::GetUserCounter()
 123 {
 124         return (this->internal_userlist.size());
 125 }
 126
 127 void chanrec::AddUser(userrec* user)
 128 {
 129         internal_userlist[user] = user;
 130 }
 131
 132 unsigned long chanrec::DelUser(userrec* user)
 133 {
 134         CUList::iterator a = internal_userlist.find(user);
 135         if (a != internal_userlist.end())
 136         {
 137                 internal_userlist.erase(a);
 138                 /* And tidy any others... */
 139                 DelOppedUser(user);
 140                 DelHalfoppedUser(user);
 141                 DelVoicedUser(user);
 142                 return internal_userlist.size();
 143         }
 144         return internal_userlist.size();
 145 }
 146
 147 bool chanrec::HasUser(userrec* user)
 148 {
 149         return (internal_userlist.find(user) != internal_userlist.end());
 150 }
 151
 152 void chanrec::AddOppedUser(userrec* user)
 153 {
 154         internal_op_userlist[user] = user;
 155 }
 156
 157 void chanrec::DelOppedUser(userrec* user)
 158 {
 159         CUList::iterator a = internal_op_userlist.find(user);
 160         if (a != internal_op_userlist.end())
 161         {
 162                 internal_op_userlist.erase(a);
 163                 return;
 164         }
 165 }
 166
 167 void chanrec::AddHalfoppedUser(userrec* user)
 168 {
 169         internal_halfop_userlist[user] = user;
 170 }
 171
 172 void chanrec::DelHalfoppedUser(userrec* user)
 173 {
 174         CUList::iterator a = internal_halfop_userlist.find(user);
 175         if (a != internal_halfop_userlist.end())
 176         {
 177                 internal_halfop_userlist.erase(a);
 178                 return;
 179         }
 180 }
 181
 182 void chanrec::AddVoicedUser(userrec* user)
 183 {
 184         internal_voice_userlist[user] = user;
 185 }
 186
 187 void chanrec::DelVoicedUser(userrec* user)
 188 {
 189         CUList::iterator a = internal_voice_userlist.find(user);
 190         if (a != internal_voice_userlist.end())
 191         {
 192                 internal_voice_userlist.erase(a);
 193                 return;
 194         }
 195 }
 196
 197 CUList* chanrec::GetUsers()
 198 {
 199         return &internal_userlist;
 200 }
 201
 202 CUList* chanrec::GetOppedUsers()
 203 {
 204         return &internal_op_userlist;
 205 }
 206
 207 CUList* chanrec::GetHalfoppedUsers()
 208 {
 209         return &internal_halfop_userlist;
 210 }
 211
 212 CUList* chanrec::GetVoicedUsers()
 213 {
 214         return &internal_voice_userlist;
 215 }
 216
 217 /*
 218  * add a channel to a user, creating the record for it if needed and linking
 219  * it to the user record
 220  */
 221
 222 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 223 {
 224         if ((!user) || (!cn))
 225         {
 226                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 227                 return 0;
 228         }
 229
 230         int created = 0;
 231         char cname[MAXBUF];
 232         int MOD_RESULT = 0;
 233         strlcpy(cname,cn,CHANMAX);
 234         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 235
 236         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 237
 238         chanrec* Ptr = FindChan(cname);
 239
 240         if (!Ptr)
 241         {
 242                 if (user->fd > -1)
 243                 {
 244                         MOD_RESULT = 0;
 245                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 246                         if (MOD_RESULT == 1)
 247                                 return NULL;
 248                 }
 249
 250                 /* create a new one */
 251                 chanlist[cname] = new chanrec();
 252                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 253                 chanlist[cname]->modes[CM_TOPICLOCK] = chanlist[cname]->modes[CM_NOEXTERNAL] = 1;
 254                 //chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 255                 chanlist[cname]->created = TIME;
 256                 *chanlist[cname]->topic = 0;
 257                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 258                 chanlist[cname]->topicset = 0;
 259                 Ptr = chanlist[cname];
 260                 log(DEBUG,"add_channel: created: %s",cname);
 261                 /*
 262                  * set created to 2 to indicate user
 263                  * is the first in the channel
 264                  * and should be given ops
 265                  */
 266                 created = 2;
 267         }
 268         else
 269         {
 270                 /* Already on the channel */
 271                 if (Ptr->HasUser(user))
 272                         return NULL;
 273
 274                 /*
 275                  * remote users are allowed us to bypass channel modes
 276                  * and bans (used by servers)
 277                  */
 278                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 279                 {
 280                         MOD_RESULT = 0;
 281                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 282                         if (MOD_RESULT == 1)
 283                         {
 284                                 return NULL;
 285                         }
 286                         else if (MOD_RESULT == 0)
 287                         {
 288                                 if (*Ptr->key)
 289                                 {
 290                                         MOD_RESULT = 0;
 291                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 292                                         if (!MOD_RESULT)
 293                                         {
 294                                                 if (!key)
 295                                                 {
 296                                                         log(DEBUG,"add_channel: no key given in JOIN");
 297                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 298                                                         return NULL;
 299                                                 }
 300                                                 else
 301                                                 {
 302                                                         if (strcmp(key,Ptr->key))
 303                                                         {
 304                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 305                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 306                                                                 return NULL;
 307                                                         }
 308                                                 }
 309                                         }
 310                                 }
 311                                 if (Ptr->modes[CM_INVITEONLY])
 312                                 {
 313                                         MOD_RESULT = 0;
 314                                         irc::string xname(Ptr->name);
 315                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 316                                         if (!MOD_RESULT)
 317                                         {
 318                                                 log(DEBUG,"add_channel: channel is +i");
 319                                                 if (user->IsInvited(xname))
 320                                                 {
 321                                                         /* user was invited to channel */
 322                                                         /* there may be an optional channel NOTICE here */
 323                                                 }
 324                                                 else
 325                                                 {
 326                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 327                                                         return NULL;
 328                                                 }
 329                                         }
 330                                         user->RemoveInvite(xname);
 331                                 }
 332                                 if (Ptr->limit)
 333                                 {
 334                                         MOD_RESULT = 0;
 335                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 336                                         if (!MOD_RESULT)
 337                                         {
 338                                                 if (usercount(Ptr) >= Ptr->limit)
 339                                                 {
 340                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 341                                                         return NULL;
 342                                                 }
 343                                         }
 344                                 }
 345                                 if (Ptr->bans.size())
 346                                 {
 347                                         log(DEBUG,"add_channel: about to walk banlist");
 348                                         MOD_RESULT = 0;
 349                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 350                                         if (!MOD_RESULT)
 351                                         {
 352                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 353                                                 {
 354                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 355                                                         {
 356                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 357                                                                 return NULL;
 358                                                         }
 359                                                 }
 360                                         }
 361                                 }
 362                         }
 363                 }
 364                 else
 365                 {
 366                         log(DEBUG,"Overridden checks");
 367                 }
 368                 created = 1;
 369         }
 370
 371         log(DEBUG,"Passed channel checks");
 372
 373         for (std::vector<ucrec*>::const_iterator index = user->chans.begin(); index != user->chans.end(); index++)
 374         {
 375                 if ((*index)->channel == NULL)
 376                 {
 377                         return ForceChan(Ptr, *index, user, created);
 378                 }
 379         }
 380
 381         /*
 382          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 383          * and put the channel in here. Same for remote users which are not bound by
 384          * the channel limits. Otherwise, nope, youre boned.
 385          */
 386         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 387         {
 388                 ucrec* a = new ucrec();
 389                 chanrec* c = ForceChan(Ptr,a,user,created);
 390                 user->chans.push_back(a);
 391                 return c;
 392         }
 393         else if (*user->oper)
 394         {
 395                 /* Oper allows extension up to the OPERMAXCHANS value */
 396                 if (user->chans.size() < OPERMAXCHANS)
 397                 {
 398                         ucrec* a = new ucrec();
 399                         chanrec* c = ForceChan(Ptr,a,user,created);
 400                         user->chans.push_back(a);
 401                         return c;
 402                 }
 403         }
 404
 405         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 406         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 407
 408         if (created == 2)
 409         {
 410                 log(DEBUG,"BLAMMO, Whacking channel.");
 411                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 412                 chan_hash::iterator n = chanlist.find(cname);
 413                 if (n != chanlist.end())
 414                 {
 415                         Ptr->DelUser(user);
 416                         delete Ptr;
 417                         chanlist.erase(n);
 418                         for (unsigned int index =0; index < user->chans.size(); index++)
 419                         {
 420                                 if (user->chans[index]->channel == Ptr)
 421                                 {
 422                                         user->chans[index]->channel = NULL;
 423                                         user->chans[index]->uc_modes = 0;
 424                                 }
 425                         }
 426                 }
 427         }
 428         return NULL;
 429 }
 430
 431 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created)
 432 {
 433         if (created == 2)
 434         {
 435                 /* first user in is given ops */
 436                 a->uc_modes = UCMODE_OP;
 437                 Ptr->AddOppedUser(user);
 438         }
 439         else
 440         {
 441                 a->uc_modes = 0;
 442         }
 443
 444         a->channel = Ptr;
 445         Ptr->AddUser(user);
 446         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 447
 448         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 449         if (IS_LOCAL(user))
 450         {
 451                 log(DEBUG,"Sent JOIN to client");
 452                 if (Ptr->topicset)
 453                 {
 454                         WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 455                         WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 456                 }
 457                 userlist(user,Ptr);
 458                 WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 459         }
 460         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 461         return Ptr;
 462 }
 463
 464 /*
 465  *remove a channel from a users record, and remove the record from memory
 466  * if the channel has become empty
 467  */
 468
 469 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 470 {
 471         if ((!user) || (!cname))
 472         {
 473                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 474                 return NULL;
 475         }
 476
 477         chanrec* Ptr = FindChan(cname);
 478
 479         if (!Ptr)
 480                 return NULL;
 481
 482         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 483
 484         for (unsigned int i =0; i < user->chans.size(); i++)
 485         {
 486                 /* zap it from the channel list of the user */
 487                 if (user->chans[i]->channel == Ptr)
 488                 {
 489                         if (reason)
 490                         {
 491                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 492                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 493                         }
 494                         else
 495                         {
 496                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 497                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 498                         }
 499                         user->chans[i]->uc_modes = 0;
 500                         user->chans[i]->channel = NULL;
 501                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 502                         break;
 503                 }
 504         }
 505
 506         Ptr->DelUser(user);
 507
 508         /* if there are no users left on the channel */
 509         if (!usercount(Ptr))
 510         {
 511                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 512
 513                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 514
 515                 /* kill the record */
 516                 if (iter != chanlist.end())
 517                 {
 518                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 519                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 520                         delete Ptr;
 521                         chanlist.erase(iter);
 522                 }
 523         }
 524
 525         return NULL;
 526 }
 527
 528 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 529 {
 530         if ((!user) || (!Ptr) || (!reason))
 531         {
 532                 return;
 533         }
 534
 535         if (IS_LOCAL(user))
 536         {
 537                 if (!Ptr->HasUser(user))
 538                 {
 539                         /* Not on channel */
 540                         return;
 541                 }
 542         }
 543
 544         if (triggerevents)
 545         {
 546                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 547         }
 548
 549         for (unsigned int i =0; i < user->chans.size(); i++)
 550         {
 551                 if ((user->chans[i]->channel) && (user->chans[i]->channel == Ptr))
 552                 {
 553                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 554                         user->chans[i]->uc_modes = 0;
 555                         user->chans[i]->channel = NULL;
 556                         break;
 557                 }
 558         }
 559
 560         Ptr->DelUser(user);
 561
 562         if (!usercount(Ptr))
 563         {
 564                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 565                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 566                 /* kill the record */
 567                 if (iter != chanlist.end())
 568                 {
 569                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 570                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 571                         delete Ptr;
 572                         chanlist.erase(iter);
 573                 }
 574         }
 575 }
 576
 577 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 578 {
 579         if ((!src) || (!user) || (!Ptr) || (!reason))
 580         {
 581                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 582                 return;
 583         }
 584
 585         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 586
 587         if (IS_LOCAL(src))
 588         {
 589                 if (!Ptr->HasUser(user))
 590                 {
 591                         WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 592                         return;
 593                 }
 594                 int MOD_RESULT = 0;
 595
 596                 if (!is_uline(src->server))
 597                 {
 598                         MOD_RESULT = 0;
 599                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 600                         if (MOD_RESULT == 1)
 601                                 return;
 602                 }
 603                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 604                 if (MOD_RESULT != -1)
 605                 {
 606                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 607                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 608                                 return;
 609
 610                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 611                         {
 612                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 613                                 {
 614                                         if (cstatus(src,Ptr) == STATUS_HOP)
 615                                         {
 616                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 617                                         }
 618                                         else
 619                                         {
 620                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 621                                         }
 622
 623                                         return;
 624                                 }
 625                         }
 626                 }
 627         }
 628
 629         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 630
 631         for (std::vector<ucrec*>::const_iterator i = user->chans.begin(); i != user->chans.end(); i++)
 632         {
 633                 /* zap it from the channel list of the user */
 634                 if ((*i)->channel && ((*i)->channel == Ptr))
 635                 {
 636                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 637                         (*i)->uc_modes = 0;
 638                         (*i)->channel = NULL;
 639                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 640                         break;
 641                 }
 642         }
 643
 644         if (!Ptr->DelUser(user))
 645         /* if there are no users left on the channel */
 646         {
 647                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 648
 649                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 650
 651                 /* kill the record */
 652                 if (iter != chanlist.end())
 653                 {
 654                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 655                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 656                         delete Ptr;
 657                         chanlist.erase(iter);
 658                 }
 659         }
 660 }