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 = 0;
  75         internal_userlist.clear();
  76         memset(&modes,0,64);
  77 }
  78
  79 void chanrec::SetCustomMode(char mode,bool mode_on)
  80 {
  81         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::IsModeSet(char mode)
 112 {
 113         return modes[mode-65];
 114 }
 115
 116 std::string chanrec::GetModeParameter(char mode)
 117 {
 118         if (mode == 'k')
 119         {
 120                 return this->key;
 121         }
 122         else if (mode == 'l')
 123         {
 124                 return ConvToStr(this->limit);
 125         }
 126         else
 127         {
 128                 std::map<char,char*>::iterator n = custom_mode_params.find(mode);
 129                 if (n != custom_mode_params.end())
 130                 {
 131                         return n->second;
 132                 }
 133                 return "";
 134         }
 135 }
 136
 137 long chanrec::GetUserCounter()
 138 {
 139         return (this->internal_userlist.size());
 140 }
 141
 142 void chanrec::AddUser(userrec* user)
 143 {
 144         internal_userlist[user] = user;
 145 }
 146
 147 unsigned long chanrec::DelUser(userrec* user)
 148 {
 149         CUList::iterator a = internal_userlist.find(user);
 150         if (a != internal_userlist.end())
 151         {
 152                 internal_userlist.erase(a);
 153                 /* And tidy any others... */
 154                 DelOppedUser(user);
 155                 DelHalfoppedUser(user);
 156                 DelVoicedUser(user);
 157                 return internal_userlist.size();
 158         }
 159         return internal_userlist.size();
 160 }
 161
 162 bool chanrec::HasUser(userrec* user)
 163 {
 164         return (internal_userlist.find(user) != internal_userlist.end());
 165 }
 166
 167 void chanrec::AddOppedUser(userrec* user)
 168 {
 169         internal_op_userlist[user] = user;
 170 }
 171
 172 void chanrec::DelOppedUser(userrec* user)
 173 {
 174         CUList::iterator a = internal_op_userlist.find(user);
 175         if (a != internal_op_userlist.end())
 176         {
 177                 internal_op_userlist.erase(a);
 178                 return;
 179         }
 180 }
 181
 182 void chanrec::AddHalfoppedUser(userrec* user)
 183 {
 184         internal_halfop_userlist[user] = user;
 185 }
 186
 187 void chanrec::DelHalfoppedUser(userrec* user)
 188 {
 189         CUList::iterator a = internal_halfop_userlist.find(user);
 190         if (a != internal_halfop_userlist.end())
 191         {
 192                 internal_halfop_userlist.erase(a);
 193                 return;
 194         }
 195 }
 196
 197 void chanrec::AddVoicedUser(userrec* user)
 198 {
 199         internal_voice_userlist[user] = user;
 200 }
 201
 202 void chanrec::DelVoicedUser(userrec* user)
 203 {
 204         CUList::iterator a = internal_voice_userlist.find(user);
 205         if (a != internal_voice_userlist.end())
 206         {
 207                 internal_voice_userlist.erase(a);
 208                 return;
 209         }
 210 }
 211
 212 CUList* chanrec::GetUsers()
 213 {
 214         return &internal_userlist;
 215 }
 216
 217 CUList* chanrec::GetOppedUsers()
 218 {
 219         return &internal_op_userlist;
 220 }
 221
 222 CUList* chanrec::GetHalfoppedUsers()
 223 {
 224         return &internal_halfop_userlist;
 225 }
 226
 227 CUList* chanrec::GetVoicedUsers()
 228 {
 229         return &internal_voice_userlist;
 230 }
 231
 232 /*
 233  * add a channel to a user, creating the record for it if needed and linking
 234  * it to the user record
 235  */
 236
 237 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 238 {
 239         if ((!user) || (!cn))
 240         {
 241                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 242                 return 0;
 243         }
 244
 245         int created = 0;
 246         char cname[MAXBUF];
 247         int MOD_RESULT = 0;
 248         strlcpy(cname,cn,CHANMAX);
 249         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 250
 251         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 252
 253         chanrec* Ptr = FindChan(cname);
 254
 255         if (!Ptr)
 256         {
 257                 if (user->fd > -1)
 258                 {
 259                         MOD_RESULT = 0;
 260                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 261                         if (MOD_RESULT == 1)
 262                                 return NULL;
 263                 }
 264
 265                 /* create a new one */
 266                 chanlist[cname] = new chanrec();
 267                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 268                 chanlist[cname]->modes[CM_TOPICLOCK] = chanlist[cname]->modes[CM_NOEXTERNAL] = 1;
 269                 //chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 270                 chanlist[cname]->created = TIME;
 271                 *chanlist[cname]->topic = 0;
 272                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 273                 chanlist[cname]->topicset = 0;
 274                 Ptr = chanlist[cname];
 275                 log(DEBUG,"add_channel: created: %s",cname);
 276                 /*
 277                  * set created to 2 to indicate user
 278                  * is the first in the channel
 279                  * and should be given ops
 280                  */
 281                 created = 2;
 282         }
 283         else
 284         {
 285                 /* Already on the channel */
 286                 if (Ptr->HasUser(user))
 287                         return NULL;
 288
 289                 /*
 290                  * remote users are allowed us to bypass channel modes
 291                  * and bans (used by servers)
 292                  */
 293                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 294                 {
 295                         MOD_RESULT = 0;
 296                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 297                         if (MOD_RESULT == 1)
 298                         {
 299                                 return NULL;
 300                         }
 301                         else if (MOD_RESULT == 0)
 302                         {
 303                                 if (*Ptr->key)
 304                                 {
 305                                         MOD_RESULT = 0;
 306                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 307                                         if (!MOD_RESULT)
 308                                         {
 309                                                 if (!key)
 310                                                 {
 311                                                         log(DEBUG,"add_channel: no key given in JOIN");
 312                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 313                                                         return NULL;
 314                                                 }
 315                                                 else
 316                                                 {
 317                                                         if (strcmp(key,Ptr->key))
 318                                                         {
 319                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 320                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 321                                                                 return NULL;
 322                                                         }
 323                                                 }
 324                                         }
 325                                 }
 326                                 if (Ptr->modes[CM_INVITEONLY])
 327                                 {
 328                                         MOD_RESULT = 0;
 329                                         irc::string xname(Ptr->name);
 330                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 331                                         if (!MOD_RESULT)
 332                                         {
 333                                                 log(DEBUG,"add_channel: channel is +i");
 334                                                 if (user->IsInvited(xname))
 335                                                 {
 336                                                         /* user was invited to channel */
 337                                                         /* there may be an optional channel NOTICE here */
 338                                                 }
 339                                                 else
 340                                                 {
 341                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 342                                                         return NULL;
 343                                                 }
 344                                         }
 345                                         user->RemoveInvite(xname);
 346                                 }
 347                                 if (Ptr->limit)
 348                                 {
 349                                         MOD_RESULT = 0;
 350                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 351                                         if (!MOD_RESULT)
 352                                         {
 353                                                 if (usercount(Ptr) >= Ptr->limit)
 354                                                 {
 355                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 356                                                         return NULL;
 357                                                 }
 358                                         }
 359                                 }
 360                                 if (Ptr->bans.size())
 361                                 {
 362                                         log(DEBUG,"add_channel: about to walk banlist");
 363                                         MOD_RESULT = 0;
 364                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 365                                         if (!MOD_RESULT)
 366                                         {
 367                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 368                                                 {
 369                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 370                                                         {
 371                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 372                                                                 return NULL;
 373                                                         }
 374                                                 }
 375                                         }
 376                                 }
 377                         }
 378                 }
 379                 else
 380                 {
 381                         log(DEBUG,"Overridden checks");
 382                 }
 383                 created = 1;
 384         }
 385
 386         log(DEBUG,"Passed channel checks");
 387
 388         for (std::vector<ucrec*>::const_iterator index = user->chans.begin(); index != user->chans.end(); index++)
 389         {
 390                 if ((ucrec*)(*index)->channel == NULL)
 391                 {
 392                         return ForceChan(Ptr,(ucrec*)(*index),user,created);
 393                 }
 394         }
 395
 396         /*
 397          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 398          * and put the channel in here. Same for remote users which are not bound by
 399          * the channel limits. Otherwise, nope, youre boned.
 400          */
 401         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 402         {
 403                 ucrec* a = new ucrec();
 404                 chanrec* c = ForceChan(Ptr,a,user,created);
 405                 user->chans.push_back(a);
 406                 return c;
 407         }
 408         else if (*user->oper)
 409         {
 410                 /* Oper allows extension up to the OPERMAXCHANS value */
 411                 if (user->chans.size() < OPERMAXCHANS)
 412                 {
 413                         ucrec* a = new ucrec();
 414                         chanrec* c = ForceChan(Ptr,a,user,created);
 415                         user->chans.push_back(a);
 416                         return c;
 417                 }
 418         }
 419
 420         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 421         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 422
 423         if (created == 2)
 424         {
 425                 log(DEBUG,"BLAMMO, Whacking channel.");
 426                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 427                 chan_hash::iterator n = chanlist.find(cname);
 428                 if (n != chanlist.end())
 429                 {
 430                         Ptr->DelUser(user);
 431                         delete Ptr;
 432                         chanlist.erase(n);
 433                         for (unsigned int index =0; index < user->chans.size(); index++)
 434                         {
 435                                 if (user->chans[index]->channel == Ptr)
 436                                 {
 437                                         user->chans[index]->channel = NULL;
 438                                         user->chans[index]->uc_modes = 0;
 439                                 }
 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                 int MOD_RESULT = 0;
 610
 611                 if (!is_uline(src->server))
 612                 {
 613                         MOD_RESULT = 0;
 614                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 615                         if (MOD_RESULT == 1)
 616                                 return;
 617                 }
 618                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 619                 if (MOD_RESULT != -1)
 620                 {
 621                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 622                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 623                                 return;
 624
 625                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 626                         {
 627                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 628                                 {
 629                                         if (cstatus(src,Ptr) == STATUS_HOP)
 630                                         {
 631                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 632                                         }
 633                                         else
 634                                         {
 635                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 636                                         }
 637
 638                                         return;
 639                                 }
 640                         }
 641                 }
 642         }
 643
 644         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 645
 646         for (std::vector<ucrec*>::const_iterator i = user->chans.begin(); i != user->chans.end(); i++)
 647         {
 648                 /* zap it from the channel list of the user */
 649                 if ((((ucrec*)(*i))->channel) && (((ucrec*)(*i))->channel == Ptr))
 650                 {
 651                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 652                         ((ucrec*)(*i))->uc_modes = 0;
 653                         ((ucrec*)(*i))->channel = NULL;
 654                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 655                         break;
 656                 }
 657         }
 658
 659         if (!Ptr->DelUser(user))
 660         /* if there are no users left on the channel */
 661         {
 662                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 663
 664                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 665
 666                 /* kill the record */
 667                 if (iter != chanlist.end())
 668                 {
 669                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 670                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 671                         delete Ptr;
 672                         chanlist.erase(iter);
 673                 }
 674         }
 675 }
 676
 677