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,0,64);
  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(userrec* user)
 132 {
 133         internal_userlist[user] = user;
 134 }
 135
 136 void chanrec::DelUser(userrec* user)
 137 {
 138         CUList::iterator a = internal_userlist.find(user);
 139         if (a != internal_userlist.end())
 140         {
 141                 internal_userlist.erase(a);
 142                 /* And tidy any others... */
 143                 DelOppedUser(user);
 144                 DelHalfoppedUser(user);
 145                 DelVoicedUser(user);
 146                 return;
 147         }
 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]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 257                 chanlist[cname]->created = TIME;
 258                 *chanlist[cname]->topic = 0;
 259                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 260                 chanlist[cname]->topicset = 0;
 261                 Ptr = chanlist[cname];
 262                 log(DEBUG,"add_channel: created: %s",cname);
 263                 /*
 264                  * set created to 2 to indicate user
 265                  * is the first in the channel
 266                  * and should be given ops
 267                  */
 268                 created = 2;
 269         }
 270         else
 271         {
 272                 /* Already on the channel */
 273                 if (Ptr->HasUser(user))
 274                         return NULL;
 275
 276                 /*
 277                  * remote users are allowed us to bypass channel modes
 278                  * and bans (used by servers)
 279                  */
 280                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 281                 {
 282                         MOD_RESULT = 0;
 283                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 284                         if (MOD_RESULT == 1)
 285                         {
 286                                 return NULL;
 287                         }
 288                         else if (MOD_RESULT == 0)
 289                         {
 290                                 if (*Ptr->key)
 291                                 {
 292                                         MOD_RESULT = 0;
 293                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 294                                         if (!MOD_RESULT)
 295                                         {
 296                                                 if (!key)
 297                                                 {
 298                                                         log(DEBUG,"add_channel: no key given in JOIN");
 299                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 300                                                         return NULL;
 301                                                 }
 302                                                 else
 303                                                 {
 304                                                         if (strcmp(key,Ptr->key))
 305                                                         {
 306                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 307                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 308                                                                 return NULL;
 309                                                         }
 310                                                 }
 311                                         }
 312                                 }
 313                                 if (Ptr->binarymodes & CM_INVITEONLY)
 314                                 {
 315                                         MOD_RESULT = 0;
 316                                         irc::string xname(Ptr->name);
 317                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 318                                         if (!MOD_RESULT)
 319                                         {
 320                                                 log(DEBUG,"add_channel: channel is +i");
 321                                                 if (user->IsInvited(xname))
 322                                                 {
 323                                                         /* user was invited to channel */
 324                                                         /* there may be an optional channel NOTICE here */
 325                                                 }
 326                                                 else
 327                                                 {
 328                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 329                                                         return NULL;
 330                                                 }
 331                                         }
 332                                         user->RemoveInvite(xname);
 333                                 }
 334                                 if (Ptr->limit)
 335                                 {
 336                                         MOD_RESULT = 0;
 337                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 338                                         if (!MOD_RESULT)
 339                                         {
 340                                                 if (usercount(Ptr) >= Ptr->limit)
 341                                                 {
 342                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 343                                                         return NULL;
 344                                                 }
 345                                         }
 346                                 }
 347                                 if (Ptr->bans.size())
 348                                 {
 349                                         log(DEBUG,"add_channel: about to walk banlist");
 350                                         MOD_RESULT = 0;
 351                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 352                                         if (!MOD_RESULT)
 353                                         {
 354                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 355                                                 {
 356                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 357                                                         {
 358                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 359                                                                 return NULL;
 360                                                         }
 361                                                 }
 362                                         }
 363                                 }
 364                         }
 365                 }
 366                 else
 367                 {
 368                         log(DEBUG,"Overridden checks");
 369                 }
 370                 created = 1;
 371         }
 372
 373         log(DEBUG,"Passed channel checks");
 374
 375         for (unsigned int index =0; index < user->chans.size(); index++)
 376         {
 377                 if (user->chans[index].channel == NULL)
 378                 {
 379                         return ForceChan(Ptr,user->chans[index],user,created);
 380                 }
 381         }
 382
 383         /*
 384          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 385          * and put the channel in here. Same for remote users which are not bound by
 386          * the channel limits. Otherwise, nope, youre boned.
 387          */
 388         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 389         {
 390                 ucrec a;
 391                 chanrec* c = ForceChan(Ptr,a,user,created);
 392                 user->chans.push_back(a);
 393                 return c;
 394         }
 395         else if (*user->oper)
 396         {
 397                 /* Oper allows extension up to the OPERMAXCHANS value */
 398                 if (user->chans.size() < OPERMAXCHANS)
 399                 {
 400                         ucrec a;
 401                         chanrec* c = ForceChan(Ptr,a,user,created);
 402                         user->chans.push_back(a);
 403                         return c;
 404                 }
 405         }
 406
 407         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 408         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 409
 410         if (created == 2)
 411         {
 412                 log(DEBUG,"BLAMMO, Whacking channel.");
 413                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 414                 chan_hash::iterator n = chanlist.find(cname);
 415                 if (n != chanlist.end())
 416                 {
 417                         Ptr->DelUser(user);
 418                         delete Ptr;
 419                         chanlist.erase(n);
 420                         for (unsigned int index =0; index < user->chans.size(); index++)
 421                         {
 422                                 if (user->chans[index].channel == Ptr)
 423                                 {
 424                                         user->chans[index].channel = NULL;
 425                                         user->chans[index].uc_modes = 0;
 426                                 }
 427                         }
 428                 }
 429         }
 430         return NULL;
 431 }
 432
 433 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 434 {
 435         if (created == 2)
 436         {
 437                 /* first user in is given ops */
 438                 a.uc_modes = UCMODE_OP;
 439                 Ptr->AddOppedUser(user);
 440         }
 441         else
 442         {
 443                 a.uc_modes = 0;
 444         }
 445
 446         a.channel = Ptr;
 447         Ptr->AddUser(user);
 448         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 449         log(DEBUG,"Sent JOIN to client");
 450
 451         if (Ptr->topicset)
 452         {
 453                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 454                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 455         }
 456
 457         userlist(user,Ptr);
 458         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 459         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 460         return Ptr;
 461 }
 462
 463 /*
 464  *remove a channel from a users record, and remove the record from memory
 465  * if the channel has become empty
 466  */
 467
 468 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 469 {
 470         if ((!user) || (!cname))
 471         {
 472                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 473                 return NULL;
 474         }
 475
 476         chanrec* Ptr = FindChan(cname);
 477
 478         if (!Ptr)
 479                 return NULL;
 480
 481         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 482
 483         for (unsigned int i =0; i < user->chans.size(); i++)
 484         {
 485                 /* zap it from the channel list of the user */
 486                 if (user->chans[i].channel == Ptr)
 487                 {
 488                         if (reason)
 489                         {
 490                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 491                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 492                         }
 493                         else
 494                         {
 495                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 496                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 497                         }
 498                         user->chans[i].uc_modes = 0;
 499                         user->chans[i].channel = NULL;
 500                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 501                         break;
 502                 }
 503         }
 504
 505         Ptr->DelUser(user);
 506
 507         /* if there are no users left on the channel */
 508         if (!usercount(Ptr))
 509         {
 510                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 511
 512                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 513
 514                 /* kill the record */
 515                 if (iter != chanlist.end())
 516                 {
 517                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 518                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 519                         delete Ptr;
 520                         chanlist.erase(iter);
 521                 }
 522         }
 523
 524         return NULL;
 525 }
 526
 527 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 528 {
 529         if ((!user) || (!Ptr) || (!reason))
 530         {
 531                 return;
 532         }
 533
 534         if (IS_LOCAL(user))
 535         {
 536                 if (!Ptr->HasUser(user))
 537                 {
 538                         /* Not on channel */
 539                         return;
 540                 }
 541         }
 542
 543         if (triggerevents)
 544         {
 545                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 546         }
 547
 548         for (unsigned int i =0; i < user->chans.size(); i++)
 549         {
 550                 if (user->chans[i].channel)
 551                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 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 (unsigned int i =0; i < user->chans.size(); i++)
 632         {
 633                 /* zap it from the channel list of the user */
 634                 if (user->chans[i].channel)
 635                 {
 636                         if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 637                         {
 638                                 WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 639                                 user->chans[i].uc_modes = 0;
 640                                 user->chans[i].channel = NULL;
 641                                 log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 642                                 break;
 643                         }
 644                 }
 645         }
 646
 647         Ptr->DelUser(user);
 648
 649         /* if there are no users left on the channel */
 650         if (!usercount(Ptr))
 651         {
 652                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 653
 654                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 655
 656                 /* kill the record */
 657                 if (iter != chanlist.end())
 658                 {
 659                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 660                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 661                         delete Ptr;
 662                         chanlist.erase(iter);
 663                 }
 664         }
 665 }
 666
 667