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 "inspircd_config.h"
  20 #include "inspircd.h"
  21 #include "inspircd_io.h"
  22 #include <unistd.h>
  23 #include <sys/errno.h>
  24 #include <sys/ioctl.h>
  25 #include <sys/utsname.h>
  26 #include <time.h>
  27 #include <string>
  28 #ifdef GCC3
  29 #include <ext/hash_map>
  30 #else
  31 #include <hash_map>
  32 #endif
  33 #include <map>
  34 #include <sstream>
  35 #include <vector>
  36 #include <deque>
  37 #include "users.h"
  38 #include "ctables.h"
  39 #include "globals.h"
  40 #include "modules.h"
  41 #include "dynamic.h"
  42 #include "commands.h"
  43 #include "wildcard.h"
  44 #include "message.h"
  45 #include "mode.h"
  46 #include "xline.h"
  47 #include "inspstring.h"
  48 #include "helperfuncs.h"
  49 #include "typedefs.h"
  50
  51 #ifdef GCC3
  52 #define nspace __gnu_cxx
  53 #else
  54 #define nspace std
  55 #endif
  56
  57 extern ServerConfig* Config;
  58
  59 extern int MODCOUNT;
  60 extern std::vector<Module*> modules;
  61 extern std::vector<ircd_module*> factory;
  62 extern int WHOWAS_STALE;
  63 extern int WHOWAS_MAX;
  64 extern time_t TIME;
  65 extern chan_hash chanlist;
  66
  67 using namespace std;
  68
  69 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created);
  70
  71 chanrec::chanrec()
  72 {
  73         *name = *topic = *setby = *key = 0;
  74         created = topicset = limit = binarymodes = 0;
  75         internal_userlist.clear();
  76         memset(&custom_modes,0,190);
  77 }
  78
  79 void chanrec::SetCustomMode(char mode,bool mode_on)
  80 {
  81         custom_modes[mode-65] = mode_on;
  82         if (!mode_on)
  83                 this->SetCustomModeParam(mode,"",false);
  84 }
  85
  86
  87 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
  88 {
  89         log(DEBUG,"SetCustomModeParam called");
  90
  91         std::map<char,char*>::iterator n = custom_mode_params.find(mode);
  92
  93         if (mode_on)
  94         {
  95                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
  96                 if (n == custom_mode_params.end())
  97                 {
  98                         custom_mode_params[mode] = strdup(parameter);
  99                 }
 100         }
 101         else
 102         {
 103                 if (n != custom_mode_params.end())
 104                 {
 105                         free(n->second);
 106                         custom_mode_params.erase(n);
 107                 }
 108         }
 109 }
 110
 111 bool chanrec::IsCustomModeSet(char mode)
 112 {
 113         return custom_modes[mode-65];
 114 }
 115
 116 std::string chanrec::GetModeParameter(char mode)
 117 {
 118         std::map<char,char*>::iterator n = custom_mode_params.find(mode);
 119         if (n != custom_mode_params.end())
 120         {
 121                 return n->second;
 122         }
 123         return "";
 124 }
 125
 126 long chanrec::GetUserCounter()
 127 {
 128         return (this->internal_userlist.size());
 129 }
 130
 131 void chanrec::AddUser(char* castuser)
 132 {
 133         internal_userlist[castuser] = castuser;
 134         log(DEBUG,"Added casted user to channel's internal list");
 135 }
 136
 137 void chanrec::DelUser(char* castuser)
 138 {
 139         std::map<char*,char*>::iterator a = internal_userlist.find(castuser);
 140         if (a != internal_userlist.end())
 141         {
 142                 log(DEBUG,"Removed casted user from channel's internal list");
 143                 internal_userlist.erase(a);
 144                 /* And tidy any others... */
 145                 DelOppedUser(castuser);
 146                 DelHalfoppedUser(castuser);
 147                 DelVoicedUser(castuser);
 148                 return;
 149         }
 150 }
 151
 152 void chanrec::AddOppedUser(char* castuser)
 153 {
 154         internal_op_userlist[castuser] = castuser;
 155         log(DEBUG,"Added casted user to channel's internal list");
 156 }
 157
 158 void chanrec::DelOppedUser(char* castuser)
 159 {
 160         std::map<char*,char*>::iterator a = internal_op_userlist.find(castuser);
 161         if (a != internal_op_userlist.end())
 162         {
 163                 log(DEBUG,"Removed casted user from channel's internal list");
 164                 internal_op_userlist.erase(a);
 165                 return;
 166         }
 167 }
 168
 169 void chanrec::AddHalfoppedUser(char* castuser)
 170 {
 171         internal_halfop_userlist[castuser] = castuser;
 172         log(DEBUG,"Added casted user to channel's internal list");
 173 }
 174
 175 void chanrec::DelHalfoppedUser(char* castuser)
 176 {
 177         std::map<char*,char*>::iterator a = internal_halfop_userlist.find(castuser);
 178         if (a != internal_halfop_userlist.end())
 179         {
 180                 log(DEBUG,"Removed casted user from channel's internal list");
 181                 internal_halfop_userlist.erase(a);
 182                 return;
 183         }
 184 }
 185
 186 void chanrec::AddVoicedUser(char* castuser)
 187 {
 188         internal_voice_userlist[castuser] = castuser;
 189         log(DEBUG,"Added casted user to channel's internal list");
 190 }
 191
 192 void chanrec::DelVoicedUser(char* castuser)
 193 {
 194         std::map<char*,char*>::iterator a = internal_voice_userlist.find(castuser);
 195         if (a != internal_voice_userlist.end())
 196         {
 197                 log(DEBUG,"Removed casted user from channel's internal list");
 198                 internal_voice_userlist.erase(a);
 199                 return;
 200         }
 201 }
 202
 203 std::map<char*,char*> *chanrec::GetUsers()
 204 {
 205         return &internal_userlist;
 206 }
 207
 208 std::map<char*,char*> *chanrec::GetOppedUsers()
 209 {
 210         return &internal_op_userlist;
 211 }
 212
 213 std::map<char*,char*> *chanrec::GetHalfoppedUsers()
 214 {
 215         return &internal_halfop_userlist;
 216 }
 217
 218 std::map<char*,char*> *chanrec::GetVoicedUsers()
 219 {
 220         return &internal_voice_userlist;
 221 }
 222
 223 /*
 224  * add a channel to a user, creating the record for it if needed and linking
 225  * it to the user record
 226  */
 227
 228 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 229 {
 230         if ((!user) || (!cn))
 231         {
 232                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 233                 return 0;
 234         }
 235
 236         int created = 0;
 237         char cname[MAXBUF];
 238         int MOD_RESULT = 0;
 239         strlcpy(cname,cn,CHANMAX);
 240         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 241
 242         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 243
 244         chanrec* Ptr = FindChan(cname);
 245
 246         if (!Ptr)
 247         {
 248                 if (user->fd > -1)
 249                 {
 250                         MOD_RESULT = 0;
 251                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 252                         if (MOD_RESULT == 1)
 253                                 return NULL;
 254                 }
 255
 256                 /* create a new one */
 257                 chanlist[cname] = new chanrec();
 258                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 259                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 260                 chanlist[cname]->created = TIME;
 261                 *chanlist[cname]->topic = 0;
 262                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 263                 chanlist[cname]->topicset = 0;
 264                 Ptr = chanlist[cname];
 265                 log(DEBUG,"add_channel: created: %s",cname);
 266                 /*
 267                  * set created to 2 to indicate user
 268                  * is the first in the channel
 269                  * and should be given ops
 270                  */
 271                 created = 2;
 272         }
 273         else
 274         {
 275                 /* Already on the channel */
 276                 if (has_channel(user,Ptr))
 277                         return NULL;
 278
 279                 /*
 280                  * remote users are allowed us to bypass channel modes
 281                  * and bans (used by servers)
 282                  */
 283                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 284                 {
 285                         MOD_RESULT = 0;
 286                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 287                         if (MOD_RESULT == 1)
 288                         {
 289                                 return NULL;
 290                         }
 291                         else if (MOD_RESULT == 0)
 292                         {
 293                                 if (*Ptr->key)
 294                                 {
 295                                         MOD_RESULT = 0;
 296                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 297                                         if (!MOD_RESULT)
 298                                         {
 299                                                 if (!key)
 300                                                 {
 301                                                         log(DEBUG,"add_channel: no key given in JOIN");
 302                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 303                                                         return NULL;
 304                                                 }
 305                                                 else
 306                                                 {
 307                                                         if (strcmp(key,Ptr->key))
 308                                                         {
 309                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 310                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 311                                                                 return NULL;
 312                                                         }
 313                                                 }
 314                                         }
 315                                 }
 316                                 if (Ptr->binarymodes & CM_INVITEONLY)
 317                                 {
 318                                         MOD_RESULT = 0;
 319                                         irc::string xname(Ptr->name);
 320                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 321                                         if (!MOD_RESULT)
 322                                         {
 323                                                 log(DEBUG,"add_channel: channel is +i");
 324                                                 if (user->IsInvited(xname))
 325                                                 {
 326                                                         /* user was invited to channel */
 327                                                         /* there may be an optional channel NOTICE here */
 328                                                 }
 329                                                 else
 330                                                 {
 331                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 332                                                         return NULL;
 333                                                 }
 334                                         }
 335                                         user->RemoveInvite(xname);
 336                                 }
 337                                 if (Ptr->limit)
 338                                 {
 339                                         MOD_RESULT = 0;
 340                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 341                                         if (!MOD_RESULT)
 342                                         {
 343                                                 if (usercount(Ptr) >= Ptr->limit)
 344                                                 {
 345                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 346                                                         return NULL;
 347                                                 }
 348                                         }
 349                                 }
 350                                 if (Ptr->bans.size())
 351                                 {
 352                                         log(DEBUG,"add_channel: about to walk banlist");
 353                                         MOD_RESULT = 0;
 354                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 355                                         if (!MOD_RESULT)
 356                                         {
 357                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 358                                                 {
 359                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 360                                                         {
 361                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 362                                                                 return NULL;
 363                                                         }
 364                                                 }
 365                                         }
 366                                 }
 367                         }
 368                 }
 369                 else
 370                 {
 371                         log(DEBUG,"Overridden checks");
 372                 }
 373                 created = 1;
 374         }
 375
 376         log(DEBUG,"Passed channel checks");
 377
 378         for (unsigned int index =0; index < user->chans.size(); index++)
 379         {
 380                 if (user->chans[index].channel == NULL)
 381                 {
 382                         return ForceChan(Ptr,user->chans[index],user,created);
 383                 }
 384         }
 385
 386         /*
 387          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 388          * and put the channel in here. Same for remote users which are not bound by
 389          * the channel limits. Otherwise, nope, youre boned.
 390          */
 391         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 392         {
 393                 ucrec a;
 394                 chanrec* c = ForceChan(Ptr,a,user,created);
 395                 user->chans.push_back(a);
 396                 return c;
 397         }
 398         else if (*user->oper)
 399         {
 400                 /* Oper allows extension up to the OPERMAXCHANS value */
 401                 if (user->chans.size() < OPERMAXCHANS)
 402                 {
 403                         ucrec a;
 404                         chanrec* c = ForceChan(Ptr,a,user,created);
 405                         user->chans.push_back(a);
 406                         return c;
 407                 }
 408         }
 409
 410         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 411         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 412
 413         if (created == 2)
 414         {
 415                 log(DEBUG,"BLAMMO, Whacking channel.");
 416                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 417                 chan_hash::iterator n = chanlist.find(cname);
 418                 if (n != chanlist.end())
 419                 {
 420                         Ptr->DelUser((char*)user);
 421                         delete Ptr;
 422                         chanlist.erase(n);
 423                         for (unsigned int index =0; index < user->chans.size(); index++)
 424                         {
 425                                 if (user->chans[index].channel == Ptr)
 426                                 {
 427                                         user->chans[index].channel = NULL;
 428                                         user->chans[index].uc_modes = 0;
 429                                 }
 430                         }
 431                 }
 432         }
 433         return NULL;
 434 }
 435
 436 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 437 {
 438         if (created == 2)
 439         {
 440                 /* first user in is given ops */
 441                 a.uc_modes = UCMODE_OP;
 442                 Ptr->AddOppedUser((char*)user);
 443         }
 444         else
 445         {
 446                 a.uc_modes = 0;
 447         }
 448
 449         a.channel = Ptr;
 450         Ptr->AddUser((char*)user);
 451         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 452         log(DEBUG,"Sent JOIN to client");
 453
 454         if (Ptr->topicset)
 455         {
 456                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 457                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 458         }
 459
 460         userlist(user,Ptr);
 461         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 462         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 463         return Ptr;
 464 }
 465
 466 /*
 467  *remove a channel from a users record, and remove the record from memory
 468  * if the channel has become empty
 469  */
 470
 471 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 472 {
 473         if ((!user) || (!cname))
 474         {
 475                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 476                 return NULL;
 477         }
 478
 479         chanrec* Ptr = FindChan(cname);
 480
 481         if (!Ptr)
 482                 return NULL;
 483
 484         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 485
 486         for (unsigned int i =0; i < user->chans.size(); i++)
 487         {
 488                 /* zap it from the channel list of the user */
 489                 if (user->chans[i].channel == Ptr)
 490                 {
 491                         if (reason)
 492                         {
 493                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 494                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 495                         }
 496                         else
 497                         {
 498                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 499                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 500                         }
 501                         user->chans[i].uc_modes = 0;
 502                         user->chans[i].channel = NULL;
 503                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 504                         break;
 505                 }
 506         }
 507
 508         Ptr->DelUser((char*)user);
 509
 510         /* if there are no users left on the channel */
 511         if (!usercount(Ptr))
 512         {
 513                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 514
 515                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 516
 517                 /* kill the record */
 518                 if (iter != chanlist.end())
 519                 {
 520                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 521                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 522                         delete Ptr;
 523                         chanlist.erase(iter);
 524                 }
 525         }
 526
 527         return NULL;
 528 }
 529
 530 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 531 {
 532         if ((!user) || (!Ptr) || (!reason))
 533         {
 534                 return;
 535         }
 536
 537         if (IS_LOCAL(user))
 538         {
 539                 if (!has_channel(user,Ptr))
 540                 {
 541                         /* Not on channel */
 542                         return;
 543                 }
 544         }
 545
 546         if (triggerevents)
 547         {
 548                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 549         }
 550
 551         for (unsigned int i =0; i < user->chans.size(); i++)
 552         {
 553                 if (user->chans[i].channel)
 554                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 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((char*)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 (!has_channel(user,Ptr))
 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 (unsigned int i =0; i < user->chans.size(); i++)
 635         {
 636                 /* zap it from the channel list of the user */
 637                 if (user->chans[i].channel)
 638                 {
 639                         if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 640                         {
 641                                 WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 642                                 user->chans[i].uc_modes = 0;
 643                                 user->chans[i].channel = NULL;
 644                                 log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 645                                 break;
 646                         }
 647                 }
 648         }
 649
 650         Ptr->DelUser((char*)user);
 651
 652         /* if there are no users left on the channel */
 653         if (!usercount(Ptr))
 654         {
 655                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 656
 657                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 658
 659                 /* kill the record */
 660                 if (iter != chanlist.end())
 661                 {
 662                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 663                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 664                         delete Ptr;
 665                         chanlist.erase(iter);
 666                 }
 667         }
 668 }
 669
 670