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::SetMode(char mode,bool mode_on)
  61 {
  62         modes[mode-65] = mode_on;
  63         if (!mode_on)
  64                 this->SetModeParam(mode,"",false);
  65 }
  66
  67
  68 void chanrec::SetModeParam(char mode,const char* parameter,bool mode_on)
  69 {
  70         log(DEBUG,"SetModeParam 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         CUListIter a = internal_userlist.find(user);
 135
 136         if (a != internal_userlist.end())
 137         {
 138                 internal_userlist.erase(a);
 139                 /* And tidy any others... */
 140                 DelOppedUser(user);
 141                 DelHalfoppedUser(user);
 142                 DelVoicedUser(user);
 143         }
 144
 145         return internal_userlist.size();
 146 }
 147
 148 bool chanrec::HasUser(userrec* user)
 149 {
 150         return (internal_userlist.find(user) != internal_userlist.end());
 151 }
 152
 153 void chanrec::AddOppedUser(userrec* user)
 154 {
 155         internal_op_userlist[user] = user;
 156 }
 157
 158 void chanrec::DelOppedUser(userrec* user)
 159 {
 160         CUListIter a = internal_op_userlist.find(user);
 161         if (a != internal_op_userlist.end())
 162         {
 163                 internal_op_userlist.erase(a);
 164                 return;
 165         }
 166 }
 167
 168 void chanrec::AddHalfoppedUser(userrec* user)
 169 {
 170         internal_halfop_userlist[user] = user;
 171 }
 172
 173 void chanrec::DelHalfoppedUser(userrec* user)
 174 {
 175         CUListIter a = internal_halfop_userlist.find(user);
 176
 177         if (a != internal_halfop_userlist.end())
 178         {
 179                 internal_halfop_userlist.erase(a);
 180         }
 181 }
 182
 183 void chanrec::AddVoicedUser(userrec* user)
 184 {
 185         internal_voice_userlist[user] = user;
 186 }
 187
 188 void chanrec::DelVoicedUser(userrec* user)
 189 {
 190         CUListIter a = internal_voice_userlist.find(user);
 191
 192         if (a != internal_voice_userlist.end())
 193         {
 194                 internal_voice_userlist.erase(a);
 195         }
 196 }
 197
 198 CUList* chanrec::GetUsers()
 199 {
 200         return &internal_userlist;
 201 }
 202
 203 CUList* chanrec::GetOppedUsers()
 204 {
 205         return &internal_op_userlist;
 206 }
 207
 208 CUList* chanrec::GetHalfoppedUsers()
 209 {
 210         return &internal_halfop_userlist;
 211 }
 212
 213 CUList* chanrec::GetVoicedUsers()
 214 {
 215         return &internal_voice_userlist;
 216 }
 217
 218 /*
 219  * add a channel to a user, creating the record for it if needed and linking
 220  * it to the user record
 221  */
 222
 223 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 224 {
 225         if ((!user) || (!cn))
 226         {
 227                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 228                 return 0;
 229         }
 230
 231         int created = 0;
 232         char cname[MAXBUF];
 233         int MOD_RESULT = 0;
 234         strlcpy(cname,cn,CHANMAX);
 235         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 236
 237         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 238
 239         chanrec* Ptr = FindChan(cname);
 240
 241         if (!Ptr)
 242         {
 243                 if (user->fd > -1)
 244                 {
 245                         MOD_RESULT = 0;
 246                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 247                         if (MOD_RESULT == 1)
 248                                 return NULL;
 249                 }
 250
 251                 /* create a new one */
 252                 chanlist[cname] = new chanrec();
 253                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 254                 chanlist[cname]->modes[CM_TOPICLOCK] = chanlist[cname]->modes[CM_NOEXTERNAL] = 1;
 255                 //chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 256                 chanlist[cname]->created = TIME;
 257                 *chanlist[cname]->topic = 0;
 258                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 259                 chanlist[cname]->topicset = 0;
 260                 Ptr = chanlist[cname];
 261                 log(DEBUG,"add_channel: created: %s",cname);
 262                 /*
 263                  * set created to 2 to indicate user
 264                  * is the first in the channel
 265                  * and should be given ops
 266                  */
 267                 created = 2;
 268         }
 269         else
 270         {
 271                 /* Already on the channel */
 272                 if (Ptr->HasUser(user))
 273                         return NULL;
 274
 275                 /*
 276                  * remote users are allowed us to bypass channel modes
 277                  * and bans (used by servers)
 278                  */
 279                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 280                 {
 281                         MOD_RESULT = 0;
 282                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 283                         if (MOD_RESULT == 1)
 284                         {
 285                                 return NULL;
 286                         }
 287                         else if (MOD_RESULT == 0)
 288                         {
 289                                 if (*Ptr->key)
 290                                 {
 291                                         MOD_RESULT = 0;
 292                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 293                                         if (!MOD_RESULT)
 294                                         {
 295                                                 if (!key)
 296                                                 {
 297                                                         log(DEBUG,"add_channel: no key given in JOIN");
 298                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 299                                                         return NULL;
 300                                                 }
 301                                                 else
 302                                                 {
 303                                                         if (strcmp(key,Ptr->key))
 304                                                         {
 305                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 306                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 307                                                                 return NULL;
 308                                                         }
 309                                                 }
 310                                         }
 311                                 }
 312                                 if (Ptr->modes[CM_INVITEONLY])
 313                                 {
 314                                         MOD_RESULT = 0;
 315                                         irc::string xname(Ptr->name);
 316                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 317                                         if (!MOD_RESULT)
 318                                         {
 319                                                 log(DEBUG,"add_channel: channel is +i");
 320                                                 if (user->IsInvited(xname))
 321                                                 {
 322                                                         /* user was invited to channel */
 323                                                         /* there may be an optional channel NOTICE here */
 324                                                 }
 325                                                 else
 326                                                 {
 327                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 328                                                         return NULL;
 329                                                 }
 330                                         }
 331                                         user->RemoveInvite(xname);
 332                                 }
 333                                 if (Ptr->limit)
 334                                 {
 335                                         MOD_RESULT = 0;
 336                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 337                                         if (!MOD_RESULT)
 338                                         {
 339                                                 if (usercount(Ptr) >= Ptr->limit)
 340                                                 {
 341                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 342                                                         return NULL;
 343                                                 }
 344                                         }
 345                                 }
 346                                 if (Ptr->bans.size())
 347                                 {
 348                                         log(DEBUG,"add_channel: about to walk banlist");
 349                                         MOD_RESULT = 0;
 350                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 351                                         char mask[MAXBUF];
 352                                         sprintf(mask,"%s@%s",user->ident, user->GetIPString());
 353                                         if (!MOD_RESULT)
 354                                         {
 355                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 356                                                 {
 357                                                         /* This allows CIDR ban matching */
 358                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 359                                                         {
 360                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 361                                                                 return NULL;
 362                                                         }
 363                                                 }
 364                                         }
 365                                 }
 366                         }
 367                 }
 368                 else
 369                 {
 370                         log(DEBUG,"Overridden checks");
 371                 }
 372                 created = 1;
 373         }
 374
 375         log(DEBUG,"Passed channel checks");
 376
 377         for (UserChanList::const_iterator index = user->chans.begin(); index != user->chans.end(); index++)
 378         {
 379                 if ((*index)->channel == NULL)
 380                 {
 381                         return ForceChan(Ptr, *index, user, created);
 382                 }
 383         }
 384
 385         /*
 386          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 387          * and put the channel in here. Same for remote users which are not bound by
 388          * the channel limits. Otherwise, nope, youre boned.
 389          */
 390         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 391         {
 392                 ucrec* a = new ucrec();
 393                 chanrec* c = ForceChan(Ptr,a,user,created);
 394                 user->chans.push_back(a);
 395                 return c;
 396         }
 397         else if (*user->oper)
 398         {
 399                 /* Oper allows extension up to the OPERMAXCHANS value */
 400                 if (user->chans.size() < OPERMAXCHANS)
 401                 {
 402                         ucrec* a = new ucrec();
 403                         chanrec* c = ForceChan(Ptr,a,user,created);
 404                         user->chans.push_back(a);
 405                         return c;
 406                 }
 407         }
 408
 409         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 410         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 411
 412         if (created == 2)
 413         {
 414                 log(DEBUG,"BLAMMO, Whacking channel.");
 415                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 416                 chan_hash::iterator n = chanlist.find(cname);
 417                 if (n != chanlist.end())
 418                 {
 419                         Ptr->DelUser(user);
 420                         DELETE(Ptr);
 421                         chanlist.erase(n);
 422                         for (unsigned int index =0; index < user->chans.size(); index++)
 423                         {
 424                                 if (user->chans[index]->channel == Ptr)
 425                                 {
 426                                         user->chans[index]->channel = NULL;
 427                                         user->chans[index]->uc_modes = 0;
 428                                 }
 429                         }
 430                 }
 431         }
 432         else
 433         {
 434                 for (unsigned int index =0; index < user->chans.size(); index++)
 435                 {
 436                         if (user->chans[index]->channel == Ptr)
 437                         {
 438                                 user->chans[index]->channel = NULL;
 439                                 user->chans[index]->uc_modes = 0;
 440                         }
 441                 }
 442         }
 443         return NULL;
 444 }
 445
 446 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created)
 447 {
 448         if (created == 2)
 449         {
 450                 /* first user in is given ops */
 451                 a->uc_modes = UCMODE_OP;
 452                 Ptr->AddOppedUser(user);
 453         }
 454         else
 455         {
 456                 a->uc_modes = 0;
 457         }
 458
 459         a->channel = Ptr;
 460         Ptr->AddUser(user);
 461         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 462
 463         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 464         if (IS_LOCAL(user))
 465         {
 466                 log(DEBUG,"Sent JOIN to client");
 467                 if (Ptr->topicset)
 468                 {
 469                         WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 470                         WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 471                 }
 472                 userlist(user,Ptr);
 473                 WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 474         }
 475         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 476         return Ptr;
 477 }
 478
 479 /*
 480  *remove a channel from a users record, and remove the record from memory
 481  * if the channel has become empty
 482  */
 483
 484 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 485 {
 486         if ((!user) || (!cname))
 487         {
 488                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 489                 return NULL;
 490         }
 491
 492         chanrec* Ptr = FindChan(cname);
 493
 494         if (!Ptr)
 495                 return NULL;
 496
 497         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 498
 499         for (unsigned int i =0; i < user->chans.size(); i++)
 500         {
 501                 /* zap it from the channel list of the user */
 502                 if (user->chans[i]->channel == Ptr)
 503                 {
 504                         if (reason)
 505                         {
 506                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 507                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 508                         }
 509                         else
 510                         {
 511                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 512                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 513                         }
 514                         user->chans[i]->uc_modes = 0;
 515                         user->chans[i]->channel = NULL;
 516                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 517                         break;
 518                 }
 519         }
 520
 521         Ptr->DelUser(user);
 522
 523         /* if there are no users left on the channel */
 524         if (!usercount(Ptr))
 525         {
 526                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 527
 528                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 529
 530                 /* kill the record */
 531                 if (iter != chanlist.end())
 532                 {
 533                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 534                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 535                         DELETE(Ptr);
 536                         chanlist.erase(iter);
 537                 }
 538         }
 539
 540         return NULL;
 541 }
 542
 543 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 544 {
 545         if ((!user) || (!Ptr) || (!reason))
 546         {
 547                 return;
 548         }
 549
 550         if (IS_LOCAL(user))
 551         {
 552                 if (!Ptr->HasUser(user))
 553                 {
 554                         /* Not on channel */
 555                         return;
 556                 }
 557         }
 558
 559         if (triggerevents)
 560         {
 561                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 562         }
 563
 564         for (unsigned int i =0; i < user->chans.size(); i++)
 565         {
 566                 if ((user->chans[i]->channel) && (user->chans[i]->channel == Ptr))
 567                 {
 568                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 569                         user->chans[i]->uc_modes = 0;
 570                         user->chans[i]->channel = NULL;
 571                         break;
 572                 }
 573         }
 574
 575         Ptr->DelUser(user);
 576
 577         if (!usercount(Ptr))
 578         {
 579                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 580                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 581                 /* kill the record */
 582                 if (iter != chanlist.end())
 583                 {
 584                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 585                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 586                         DELETE(Ptr);
 587                         chanlist.erase(iter);
 588                 }
 589         }
 590 }
 591
 592 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 593 {
 594         if ((!src) || (!user) || (!Ptr) || (!reason))
 595         {
 596                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 597                 return;
 598         }
 599
 600         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 601
 602         if (IS_LOCAL(src))
 603         {
 604                 if (!Ptr->HasUser(user))
 605                 {
 606                         WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 607                         return;
 608                 }
 609                 if ((is_uline(user->server)) && (!is_uline(src->server)))
 610                 {
 611                         WriteServ(src->fd,"482 %s %s :Only a u-line may kick a u-line from a channel.",src->nick, Ptr->name);
 612                         return;
 613                 }
 614                 int MOD_RESULT = 0;
 615
 616                 if (!is_uline(src->server))
 617                 {
 618                         MOD_RESULT = 0;
 619                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 620                         if (MOD_RESULT == 1)
 621                                 return;
 622                 }
 623                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 624                 if (MOD_RESULT != -1)
 625                 {
 626                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 627                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 628                                 return;
 629
 630                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 631                         {
 632                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 633                                 {
 634                                         if (cstatus(src,Ptr) == STATUS_HOP)
 635                                         {
 636                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 637                                         }
 638                                         else
 639                                         {
 640                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 641                                         }
 642
 643                                         return;
 644                                 }
 645                         }
 646                 }
 647         }
 648
 649         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 650
 651         for (UserChanList::const_iterator i = user->chans.begin(); i != user->chans.end(); i++)
 652         {
 653                 /* zap it from the channel list of the user */
 654                 if ((*i)->channel && ((*i)->channel == Ptr))
 655                 {
 656                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 657                         (*i)->uc_modes = 0;
 658                         (*i)->channel = NULL;
 659                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 660                         break;
 661                 }
 662         }
 663
 664         if (!Ptr->DelUser(user))
 665         /* if there are no users left on the channel */
 666         {
 667                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 668
 669                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 670
 671                 /* kill the record */
 672                 if (iter != chanlist.end())
 673                 {
 674                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 675                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 676                         DELETE(Ptr);
 677                         chanlist.erase(iter);
 678                 }
 679         }
 680 }