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 "configreader.h"
  20 #include "inspircd.h"
  21 #include <unistd.h>
  22 #include <sys/errno.h>
  23 #include <sys/ioctl.h>
  24 #include <sys/utsname.h>
  25 #include <time.h>
  26 #include <string>
  27 #include <map>
  28 #include <sstream>
  29 #include <vector>
  30 #include <deque>
  31 #include "hash_map.h"
  32 #include "users.h"
  33 #include "ctables.h"
  34 #include "globals.h"
  35 #include "modules.h"
  36 #include "dynamic.h"
  37 #include "commands.h"
  38 #include "wildcard.h"
  39 #include "message.h"
  40 #include "mode.h"
  41 #include "xline.h"
  42 #include "inspstring.h"
  43 #include "helperfuncs.h"
  44 #include "typedefs.h"
  45
  46 extern ServerConfig* Config;
  47
  48 extern int MODCOUNT;
  49 extern std::vector<Module*> modules;
  50 extern std::vector<ircd_module*> factory;
  51 extern int WHOWAS_STALE;
  52 extern int WHOWAS_MAX;
  53 extern time_t TIME;
  54 extern chan_hash chanlist;
  55
  56
  57 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created);
  58
  59 chanrec::chanrec()
  60 {
  61         *name = *topic = *setby = *key = 0;
  62         created = topicset = limit = 0;
  63         internal_userlist.clear();
  64         memset(&modes,0,64);
  65 }
  66
  67 void chanrec::SetCustomMode(char mode,bool mode_on)
  68 {
  69         modes[mode-65] = mode_on;
  70         if (!mode_on)
  71                 this->SetCustomModeParam(mode,"",false);
  72 }
  73
  74
  75 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
  76 {
  77         log(DEBUG,"SetCustomModeParam called");
  78
  79         std::map<char,char*>::iterator n = custom_mode_params.find(mode);
  80
  81         if (mode_on)
  82         {
  83                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
  84                 if (n == custom_mode_params.end())
  85                 {
  86                         custom_mode_params[mode] = strdup(parameter);
  87                 }
  88         }
  89         else
  90         {
  91                 if (n != custom_mode_params.end())
  92                 {
  93                         free(n->second);
  94                         custom_mode_params.erase(n);
  95                 }
  96         }
  97 }
  98
  99 bool chanrec::IsModeSet(char mode)
 100 {
 101         return modes[mode-65];
 102 }
 103
 104 std::string chanrec::GetModeParameter(char mode)
 105 {
 106         if (mode == 'k')
 107         {
 108                 return this->key;
 109         }
 110         else if (mode == 'l')
 111         {
 112                 return ConvToStr(this->limit);
 113         }
 114         else
 115         {
 116                 std::map<char,char*>::iterator n = custom_mode_params.find(mode);
 117                 if (n != custom_mode_params.end())
 118                 {
 119                         return n->second;
 120                 }
 121                 return "";
 122         }
 123 }
 124
 125 long chanrec::GetUserCounter()
 126 {
 127         return (this->internal_userlist.size());
 128 }
 129
 130 void chanrec::AddUser(userrec* user)
 131 {
 132         internal_userlist[user] = user;
 133 }
 134
 135 unsigned long chanrec::DelUser(userrec* user)
 136 {
 137         CUList::iterator a = internal_userlist.find(user);
 138         if (a != internal_userlist.end())
 139         {
 140                 internal_userlist.erase(a);
 141                 /* And tidy any others... */
 142                 DelOppedUser(user);
 143                 DelHalfoppedUser(user);
 144                 DelVoicedUser(user);
 145                 return internal_userlist.size();
 146         }
 147         return internal_userlist.size();
 148 }
 149
 150 bool chanrec::HasUser(userrec* user)
 151 {
 152         return (internal_userlist.find(user) != internal_userlist.end());
 153 }
 154
 155 void chanrec::AddOppedUser(userrec* user)
 156 {
 157         internal_op_userlist[user] = user;
 158 }
 159
 160 void chanrec::DelOppedUser(userrec* user)
 161 {
 162         CUList::iterator a = internal_op_userlist.find(user);
 163         if (a != internal_op_userlist.end())
 164         {
 165                 internal_op_userlist.erase(a);
 166                 return;
 167         }
 168 }
 169
 170 void chanrec::AddHalfoppedUser(userrec* user)
 171 {
 172         internal_halfop_userlist[user] = user;
 173 }
 174
 175 void chanrec::DelHalfoppedUser(userrec* user)
 176 {
 177         CUList::iterator a = internal_halfop_userlist.find(user);
 178         if (a != internal_halfop_userlist.end())
 179         {
 180                 internal_halfop_userlist.erase(a);
 181                 return;
 182         }
 183 }
 184
 185 void chanrec::AddVoicedUser(userrec* user)
 186 {
 187         internal_voice_userlist[user] = user;
 188 }
 189
 190 void chanrec::DelVoicedUser(userrec* user)
 191 {
 192         CUList::iterator a = internal_voice_userlist.find(user);
 193         if (a != internal_voice_userlist.end())
 194         {
 195                 internal_voice_userlist.erase(a);
 196                 return;
 197         }
 198 }
 199
 200 CUList* chanrec::GetUsers()
 201 {
 202         return &internal_userlist;
 203 }
 204
 205 CUList* chanrec::GetOppedUsers()
 206 {
 207         return &internal_op_userlist;
 208 }
 209
 210 CUList* chanrec::GetHalfoppedUsers()
 211 {
 212         return &internal_halfop_userlist;
 213 }
 214
 215 CUList* chanrec::GetVoicedUsers()
 216 {
 217         return &internal_voice_userlist;
 218 }
 219
 220 /*
 221  * add a channel to a user, creating the record for it if needed and linking
 222  * it to the user record
 223  */
 224
 225 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 226 {
 227         if ((!user) || (!cn))
 228         {
 229                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 230                 return 0;
 231         }
 232
 233         int created = 0;
 234         char cname[MAXBUF];
 235         int MOD_RESULT = 0;
 236         strlcpy(cname,cn,CHANMAX);
 237         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 238
 239         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 240
 241         chanrec* Ptr = FindChan(cname);
 242
 243         if (!Ptr)
 244         {
 245                 if (user->fd > -1)
 246                 {
 247                         MOD_RESULT = 0;
 248                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 249                         if (MOD_RESULT == 1)
 250                                 return NULL;
 251                 }
 252
 253                 /* create a new one */
 254                 chanlist[cname] = new chanrec();
 255                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 256                 chanlist[cname]->modes[CM_TOPICLOCK] = chanlist[cname]->modes[CM_NOEXTERNAL] = 1;
 257                 //chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 258                 chanlist[cname]->created = TIME;
 259                 *chanlist[cname]->topic = 0;
 260                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 261                 chanlist[cname]->topicset = 0;
 262                 Ptr = chanlist[cname];
 263                 log(DEBUG,"add_channel: created: %s",cname);
 264                 /*
 265                  * set created to 2 to indicate user
 266                  * is the first in the channel
 267                  * and should be given ops
 268                  */
 269                 created = 2;
 270         }
 271         else
 272         {
 273                 /* Already on the channel */
 274                 if (Ptr->HasUser(user))
 275                         return NULL;
 276
 277                 /*
 278                  * remote users are allowed us to bypass channel modes
 279                  * and bans (used by servers)
 280                  */
 281                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 282                 {
 283                         MOD_RESULT = 0;
 284                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 285                         if (MOD_RESULT == 1)
 286                         {
 287                                 return NULL;
 288                         }
 289                         else if (MOD_RESULT == 0)
 290                         {
 291                                 if (*Ptr->key)
 292                                 {
 293                                         MOD_RESULT = 0;
 294                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 295                                         if (!MOD_RESULT)
 296                                         {
 297                                                 if (!key)
 298                                                 {
 299                                                         log(DEBUG,"add_channel: no key given in JOIN");
 300                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 301                                                         return NULL;
 302                                                 }
 303                                                 else
 304                                                 {
 305                                                         if (strcmp(key,Ptr->key))
 306                                                         {
 307                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 308                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 309                                                                 return NULL;
 310                                                         }
 311                                                 }
 312                                         }
 313                                 }
 314                                 if (Ptr->modes[CM_INVITEONLY])
 315                                 {
 316                                         MOD_RESULT = 0;
 317                                         irc::string xname(Ptr->name);
 318                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 319                                         if (!MOD_RESULT)
 320                                         {
 321                                                 log(DEBUG,"add_channel: channel is +i");
 322                                                 if (user->IsInvited(xname))
 323                                                 {
 324                                                         /* user was invited to channel */
 325                                                         /* there may be an optional channel NOTICE here */
 326                                                 }
 327                                                 else
 328                                                 {
 329                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 330                                                         return NULL;
 331                                                 }
 332                                         }
 333                                         user->RemoveInvite(xname);
 334                                 }
 335                                 if (Ptr->limit)
 336                                 {
 337                                         MOD_RESULT = 0;
 338                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 339                                         if (!MOD_RESULT)
 340                                         {
 341                                                 if (usercount(Ptr) >= Ptr->limit)
 342                                                 {
 343                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 344                                                         return NULL;
 345                                                 }
 346                                         }
 347                                 }
 348                                 if (Ptr->bans.size())
 349                                 {
 350                                         log(DEBUG,"add_channel: about to walk banlist");
 351                                         MOD_RESULT = 0;
 352                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 353                                         if (!MOD_RESULT)
 354                                         {
 355                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 356                                                 {
 357                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 358                                                         {
 359                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 360                                                                 return NULL;
 361                                                         }
 362                                                 }
 363                                         }
 364                                 }
 365                         }
 366                 }
 367                 else
 368                 {
 369                         log(DEBUG,"Overridden checks");
 370                 }
 371                 created = 1;
 372         }
 373
 374         log(DEBUG,"Passed channel checks");
 375
 376         for (std::vector<ucrec*>::const_iterator index = user->chans.begin(); index != user->chans.end(); index++)
 377         {
 378                 if ((ucrec*)(*index)->channel == NULL)
 379                 {
 380                         return ForceChan(Ptr,(ucrec*)(*index),user,created);
 381                 }
 382         }
 383
 384         /*
 385          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 386          * and put the channel in here. Same for remote users which are not bound by
 387          * the channel limits. Otherwise, nope, youre boned.
 388          */
 389         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 390         {
 391                 ucrec* a = new ucrec();
 392                 chanrec* c = ForceChan(Ptr,a,user,created);
 393                 user->chans.push_back(a);
 394                 return c;
 395         }
 396         else if (*user->oper)
 397         {
 398                 /* Oper allows extension up to the OPERMAXCHANS value */
 399                 if (user->chans.size() < OPERMAXCHANS)
 400                 {
 401                         ucrec* a = new ucrec();
 402                         chanrec* c = ForceChan(Ptr,a,user,created);
 403                         user->chans.push_back(a);
 404                         return c;
 405                 }
 406         }
 407
 408         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 409         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 410
 411         if (created == 2)
 412         {
 413                 log(DEBUG,"BLAMMO, Whacking channel.");
 414                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 415                 chan_hash::iterator n = chanlist.find(cname);
 416                 if (n != chanlist.end())
 417                 {
 418                         Ptr->DelUser(user);
 419                         delete Ptr;
 420                         chanlist.erase(n);
 421                         for (unsigned int index =0; index < user->chans.size(); index++)
 422                         {
 423                                 if (user->chans[index]->channel == Ptr)
 424                                 {
 425                                         user->chans[index]->channel = NULL;
 426                                         user->chans[index]->uc_modes = 0;
 427                                 }
 428                         }
 429                 }
 430         }
 431         return NULL;
 432 }
 433
 434 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created)
 435 {
 436         if (created == 2)
 437         {
 438                 /* first user in is given ops */
 439                 a->uc_modes = UCMODE_OP;
 440                 Ptr->AddOppedUser(user);
 441         }
 442         else
 443         {
 444                 a->uc_modes = 0;
 445         }
 446
 447         a->channel = Ptr;
 448         Ptr->AddUser(user);
 449         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 450
 451         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 452         if (IS_LOCAL(user))
 453         {
 454                 log(DEBUG,"Sent JOIN to client");
 455                 if (Ptr->topicset)
 456                 {
 457                         WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 458                         WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 459                 }
 460                 userlist(user,Ptr);
 461                 WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 462         }
 463         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 464         return Ptr;
 465 }
 466
 467 /*
 468  *remove a channel from a users record, and remove the record from memory
 469  * if the channel has become empty
 470  */
 471
 472 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 473 {
 474         if ((!user) || (!cname))
 475         {
 476                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 477                 return NULL;
 478         }
 479
 480         chanrec* Ptr = FindChan(cname);
 481
 482         if (!Ptr)
 483                 return NULL;
 484
 485         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 486
 487         for (unsigned int i =0; i < user->chans.size(); i++)
 488         {
 489                 /* zap it from the channel list of the user */
 490                 if (user->chans[i]->channel == Ptr)
 491                 {
 492                         if (reason)
 493                         {
 494                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 495                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 496                         }
 497                         else
 498                         {
 499                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 500                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 501                         }
 502                         user->chans[i]->uc_modes = 0;
 503                         user->chans[i]->channel = NULL;
 504                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 505                         break;
 506                 }
 507         }
 508
 509         Ptr->DelUser(user);
 510
 511         /* if there are no users left on the channel */
 512         if (!usercount(Ptr))
 513         {
 514                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 515
 516                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 517
 518                 /* kill the record */
 519                 if (iter != chanlist.end())
 520                 {
 521                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 522                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 523                         delete Ptr;
 524                         chanlist.erase(iter);
 525                 }
 526         }
 527
 528         return NULL;
 529 }
 530
 531 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 532 {
 533         if ((!user) || (!Ptr) || (!reason))
 534         {
 535                 return;
 536         }
 537
 538         if (IS_LOCAL(user))
 539         {
 540                 if (!Ptr->HasUser(user))
 541                 {
 542                         /* Not on channel */
 543                         return;
 544                 }
 545         }
 546
 547         if (triggerevents)
 548         {
 549                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 550         }
 551
 552         for (unsigned int i =0; i < user->chans.size(); i++)
 553         {
 554                 if ((user->chans[i]->channel) && (user->chans[i]->channel == Ptr))
 555                 {
 556                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 557                         user->chans[i]->uc_modes = 0;
 558                         user->chans[i]->channel = NULL;
 559                         break;
 560                 }
 561         }
 562
 563         Ptr->DelUser(user);
 564
 565         if (!usercount(Ptr))
 566         {
 567                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 568                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 569                 /* kill the record */
 570                 if (iter != chanlist.end())
 571                 {
 572                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 573                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 574                         delete Ptr;
 575                         chanlist.erase(iter);
 576                 }
 577         }
 578 }
 579
 580 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 581 {
 582         if ((!src) || (!user) || (!Ptr) || (!reason))
 583         {
 584                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 585                 return;
 586         }
 587
 588         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 589
 590         if (IS_LOCAL(src))
 591         {
 592                 if (!Ptr->HasUser(user))
 593                 {
 594                         WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 595                         return;
 596                 }
 597                 int MOD_RESULT = 0;
 598
 599                 if (!is_uline(src->server))
 600                 {
 601                         MOD_RESULT = 0;
 602                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 603                         if (MOD_RESULT == 1)
 604                                 return;
 605                 }
 606                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 607                 if (MOD_RESULT != -1)
 608                 {
 609                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 610                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 611                                 return;
 612
 613                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 614                         {
 615                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 616                                 {
 617                                         if (cstatus(src,Ptr) == STATUS_HOP)
 618                                         {
 619                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 620                                         }
 621                                         else
 622                                         {
 623                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 624                                         }
 625
 626                                         return;
 627                                 }
 628                         }
 629                 }
 630         }
 631
 632         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 633
 634         for (std::vector<ucrec*>::const_iterator i = user->chans.begin(); i != user->chans.end(); i++)
 635         {
 636                 /* zap it from the channel list of the user */
 637                 if ((((ucrec*)(*i))->channel) && (((ucrec*)(*i))->channel == Ptr))
 638                 {
 639                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 640                         ((ucrec*)(*i))->uc_modes = 0;
 641                         ((ucrec*)(*i))->channel = NULL;
 642                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 643                         break;
 644                 }
 645         }
 646
 647         if (!Ptr->DelUser(user))
 648         /* if there are no users left on the channel */
 649         {
 650                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 651
 652                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 653
 654                 /* kill the record */
 655                 if (iter != chanlist.end())
 656                 {
 657                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 658                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 659                         delete Ptr;
 660                         chanlist.erase(iter);
 661                 }
 662         }
 663 }