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
  68 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created);
  69
  70 chanrec::chanrec()
  71 {
  72         *name = *topic = *setby = *key = 0;
  73         created = topicset = limit = 0;
  74         internal_userlist.clear();
  75         memset(&modes,0,64);
  76 }
  77
  78 void chanrec::SetCustomMode(char mode,bool mode_on)
  79 {
  80         modes[mode-65] = mode_on;
  81         if (!mode_on)
  82                 this->SetCustomModeParam(mode,"",false);
  83 }
  84
  85
  86 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
  87 {
  88         log(DEBUG,"SetCustomModeParam called");
  89
  90         std::map<char,char*>::iterator n = custom_mode_params.find(mode);
  91
  92         if (mode_on)
  93         {
  94                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
  95                 if (n == custom_mode_params.end())
  96                 {
  97                         custom_mode_params[mode] = strdup(parameter);
  98                 }
  99         }
 100         else
 101         {
 102                 if (n != custom_mode_params.end())
 103                 {
 104                         free(n->second);
 105                         custom_mode_params.erase(n);
 106                 }
 107         }
 108 }
 109
 110 bool chanrec::IsModeSet(char mode)
 111 {
 112         return modes[mode-65];
 113 }
 114
 115 std::string chanrec::GetModeParameter(char mode)
 116 {
 117         if (mode == 'k')
 118         {
 119                 return this->key;
 120         }
 121         else if (mode == 'l')
 122         {
 123                 return ConvToStr(this->limit);
 124         }
 125         else
 126         {
 127                 std::map<char,char*>::iterator n = custom_mode_params.find(mode);
 128                 if (n != custom_mode_params.end())
 129                 {
 130                         return n->second;
 131                 }
 132                 return "";
 133         }
 134 }
 135
 136 long chanrec::GetUserCounter()
 137 {
 138         return (this->internal_userlist.size());
 139 }
 140
 141 void chanrec::AddUser(userrec* user)
 142 {
 143         internal_userlist[user] = user;
 144 }
 145
 146 unsigned long chanrec::DelUser(userrec* user)
 147 {
 148         CUList::iterator a = internal_userlist.find(user);
 149         if (a != internal_userlist.end())
 150         {
 151                 internal_userlist.erase(a);
 152                 /* And tidy any others... */
 153                 DelOppedUser(user);
 154                 DelHalfoppedUser(user);
 155                 DelVoicedUser(user);
 156                 return internal_userlist.size();
 157         }
 158         return internal_userlist.size();
 159 }
 160
 161 bool chanrec::HasUser(userrec* user)
 162 {
 163         return (internal_userlist.find(user) != internal_userlist.end());
 164 }
 165
 166 void chanrec::AddOppedUser(userrec* user)
 167 {
 168         internal_op_userlist[user] = user;
 169 }
 170
 171 void chanrec::DelOppedUser(userrec* user)
 172 {
 173         CUList::iterator a = internal_op_userlist.find(user);
 174         if (a != internal_op_userlist.end())
 175         {
 176                 internal_op_userlist.erase(a);
 177                 return;
 178         }
 179 }
 180
 181 void chanrec::AddHalfoppedUser(userrec* user)
 182 {
 183         internal_halfop_userlist[user] = user;
 184 }
 185
 186 void chanrec::DelHalfoppedUser(userrec* user)
 187 {
 188         CUList::iterator a = internal_halfop_userlist.find(user);
 189         if (a != internal_halfop_userlist.end())
 190         {
 191                 internal_halfop_userlist.erase(a);
 192                 return;
 193         }
 194 }
 195
 196 void chanrec::AddVoicedUser(userrec* user)
 197 {
 198         internal_voice_userlist[user] = user;
 199 }
 200
 201 void chanrec::DelVoicedUser(userrec* user)
 202 {
 203         CUList::iterator a = internal_voice_userlist.find(user);
 204         if (a != internal_voice_userlist.end())
 205         {
 206                 internal_voice_userlist.erase(a);
 207                 return;
 208         }
 209 }
 210
 211 CUList* chanrec::GetUsers()
 212 {
 213         return &internal_userlist;
 214 }
 215
 216 CUList* chanrec::GetOppedUsers()
 217 {
 218         return &internal_op_userlist;
 219 }
 220
 221 CUList* chanrec::GetHalfoppedUsers()
 222 {
 223         return &internal_halfop_userlist;
 224 }
 225
 226 CUList* chanrec::GetVoicedUsers()
 227 {
 228         return &internal_voice_userlist;
 229 }
 230
 231 /*
 232  * add a channel to a user, creating the record for it if needed and linking
 233  * it to the user record
 234  */
 235
 236 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 237 {
 238         if ((!user) || (!cn))
 239         {
 240                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 241                 return 0;
 242         }
 243
 244         int created = 0;
 245         char cname[MAXBUF];
 246         int MOD_RESULT = 0;
 247         strlcpy(cname,cn,CHANMAX);
 248         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 249
 250         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 251
 252         chanrec* Ptr = FindChan(cname);
 253
 254         if (!Ptr)
 255         {
 256                 if (user->fd > -1)
 257                 {
 258                         MOD_RESULT = 0;
 259                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 260                         if (MOD_RESULT == 1)
 261                                 return NULL;
 262                 }
 263
 264                 /* create a new one */
 265                 chanlist[cname] = new chanrec();
 266                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 267                 chanlist[cname]->modes[CM_TOPICLOCK] = chanlist[cname]->modes[CM_NOEXTERNAL] = 1;
 268                 //chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 269                 chanlist[cname]->created = TIME;
 270                 *chanlist[cname]->topic = 0;
 271                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX-1);
 272                 chanlist[cname]->topicset = 0;
 273                 Ptr = chanlist[cname];
 274                 log(DEBUG,"add_channel: created: %s",cname);
 275                 /*
 276                  * set created to 2 to indicate user
 277                  * is the first in the channel
 278                  * and should be given ops
 279                  */
 280                 created = 2;
 281         }
 282         else
 283         {
 284                 /* Already on the channel */
 285                 if (Ptr->HasUser(user))
 286                         return NULL;
 287
 288                 /*
 289                  * remote users are allowed us to bypass channel modes
 290                  * and bans (used by servers)
 291                  */
 292                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 293                 {
 294                         MOD_RESULT = 0;
 295                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 296                         if (MOD_RESULT == 1)
 297                         {
 298                                 return NULL;
 299                         }
 300                         else if (MOD_RESULT == 0)
 301                         {
 302                                 if (*Ptr->key)
 303                                 {
 304                                         MOD_RESULT = 0;
 305                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 306                                         if (!MOD_RESULT)
 307                                         {
 308                                                 if (!key)
 309                                                 {
 310                                                         log(DEBUG,"add_channel: no key given in JOIN");
 311                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 312                                                         return NULL;
 313                                                 }
 314                                                 else
 315                                                 {
 316                                                         if (strcmp(key,Ptr->key))
 317                                                         {
 318                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 319                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 320                                                                 return NULL;
 321                                                         }
 322                                                 }
 323                                         }
 324                                 }
 325                                 if (Ptr->modes[CM_INVITEONLY])
 326                                 {
 327                                         MOD_RESULT = 0;
 328                                         irc::string xname(Ptr->name);
 329                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 330                                         if (!MOD_RESULT)
 331                                         {
 332                                                 log(DEBUG,"add_channel: channel is +i");
 333                                                 if (user->IsInvited(xname))
 334                                                 {
 335                                                         /* user was invited to channel */
 336                                                         /* there may be an optional channel NOTICE here */
 337                                                 }
 338                                                 else
 339                                                 {
 340                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 341                                                         return NULL;
 342                                                 }
 343                                         }
 344                                         user->RemoveInvite(xname);
 345                                 }
 346                                 if (Ptr->limit)
 347                                 {
 348                                         MOD_RESULT = 0;
 349                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 350                                         if (!MOD_RESULT)
 351                                         {
 352                                                 if (usercount(Ptr) >= Ptr->limit)
 353                                                 {
 354                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 355                                                         return NULL;
 356                                                 }
 357                                         }
 358                                 }
 359                                 if (Ptr->bans.size())
 360                                 {
 361                                         log(DEBUG,"add_channel: about to walk banlist");
 362                                         MOD_RESULT = 0;
 363                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 364                                         if (!MOD_RESULT)
 365                                         {
 366                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 367                                                 {
 368                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 369                                                         {
 370                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 371                                                                 return NULL;
 372                                                         }
 373                                                 }
 374                                         }
 375                                 }
 376                         }
 377                 }
 378                 else
 379                 {
 380                         log(DEBUG,"Overridden checks");
 381                 }
 382                 created = 1;
 383         }
 384
 385         log(DEBUG,"Passed channel checks");
 386
 387         for (std::vector<ucrec*>::const_iterator index = user->chans.begin(); index != user->chans.end(); index++)
 388         {
 389                 if ((ucrec*)(*index)->channel == NULL)
 390                 {
 391                         return ForceChan(Ptr,(ucrec*)(*index),user,created);
 392                 }
 393         }
 394
 395         /*
 396          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 397          * and put the channel in here. Same for remote users which are not bound by
 398          * the channel limits. Otherwise, nope, youre boned.
 399          */
 400         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 401         {
 402                 ucrec* a = new ucrec();
 403                 chanrec* c = ForceChan(Ptr,a,user,created);
 404                 user->chans.push_back(a);
 405                 return c;
 406         }
 407         else if (*user->oper)
 408         {
 409                 /* Oper allows extension up to the OPERMAXCHANS value */
 410                 if (user->chans.size() < OPERMAXCHANS)
 411                 {
 412                         ucrec* a = new ucrec();
 413                         chanrec* c = ForceChan(Ptr,a,user,created);
 414                         user->chans.push_back(a);
 415                         return c;
 416                 }
 417         }
 418
 419         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 420         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 421
 422         if (created == 2)
 423         {
 424                 log(DEBUG,"BLAMMO, Whacking channel.");
 425                 /* Things went seriously pear shaped, so take this away. bwahaha. */
 426                 chan_hash::iterator n = chanlist.find(cname);
 427                 if (n != chanlist.end())
 428                 {
 429                         Ptr->DelUser(user);
 430                         delete Ptr;
 431                         chanlist.erase(n);
 432                         for (unsigned int index =0; index < user->chans.size(); index++)
 433                         {
 434                                 if (user->chans[index]->channel == Ptr)
 435                                 {
 436                                         user->chans[index]->channel = NULL;
 437                                         user->chans[index]->uc_modes = 0;
 438                                 }
 439                         }
 440                 }
 441         }
 442         return NULL;
 443 }
 444
 445 chanrec* ForceChan(chanrec* Ptr,ucrec *a,userrec* user, int created)
 446 {
 447         if (created == 2)
 448         {
 449                 /* first user in is given ops */
 450                 a->uc_modes = UCMODE_OP;
 451                 Ptr->AddOppedUser(user);
 452         }
 453         else
 454         {
 455                 a->uc_modes = 0;
 456         }
 457
 458         a->channel = Ptr;
 459         Ptr->AddUser(user);
 460         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 461
 462         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 463         if (IS_LOCAL(user))
 464         {
 465                 log(DEBUG,"Sent JOIN to client");
 466                 if (Ptr->topicset)
 467                 {
 468                         WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 469                         WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 470                 }
 471                 userlist(user,Ptr);
 472                 WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 473         }
 474         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 475         return Ptr;
 476 }
 477
 478 /*
 479  *remove a channel from a users record, and remove the record from memory
 480  * if the channel has become empty
 481  */
 482
 483 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 484 {
 485         if ((!user) || (!cname))
 486         {
 487                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 488                 return NULL;
 489         }
 490
 491         chanrec* Ptr = FindChan(cname);
 492
 493         if (!Ptr)
 494                 return NULL;
 495
 496         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 497
 498         for (unsigned int i =0; i < user->chans.size(); i++)
 499         {
 500                 /* zap it from the channel list of the user */
 501                 if (user->chans[i]->channel == Ptr)
 502                 {
 503                         if (reason)
 504                         {
 505                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 506                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 507                         }
 508                         else
 509                         {
 510                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 511                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 512                         }
 513                         user->chans[i]->uc_modes = 0;
 514                         user->chans[i]->channel = NULL;
 515                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 516                         break;
 517                 }
 518         }
 519
 520         Ptr->DelUser(user);
 521
 522         /* if there are no users left on the channel */
 523         if (!usercount(Ptr))
 524         {
 525                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 526
 527                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 528
 529                 /* kill the record */
 530                 if (iter != chanlist.end())
 531                 {
 532                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 533                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 534                         delete Ptr;
 535                         chanlist.erase(iter);
 536                 }
 537         }
 538
 539         return NULL;
 540 }
 541
 542 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 543 {
 544         if ((!user) || (!Ptr) || (!reason))
 545         {
 546                 return;
 547         }
 548
 549         if (IS_LOCAL(user))
 550         {
 551                 if (!Ptr->HasUser(user))
 552                 {
 553                         /* Not on channel */
 554                         return;
 555                 }
 556         }
 557
 558         if (triggerevents)
 559         {
 560                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 561         }
 562
 563         for (unsigned int i =0; i < user->chans.size(); i++)
 564         {
 565                 if ((user->chans[i]->channel) && (user->chans[i]->channel == Ptr))
 566                 {
 567                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 568                         user->chans[i]->uc_modes = 0;
 569                         user->chans[i]->channel = NULL;
 570                         break;
 571                 }
 572         }
 573
 574         Ptr->DelUser(user);
 575
 576         if (!usercount(Ptr))
 577         {
 578                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 579                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 580                 /* kill the record */
 581                 if (iter != chanlist.end())
 582                 {
 583                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 584                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 585                         delete Ptr;
 586                         chanlist.erase(iter);
 587                 }
 588         }
 589 }
 590
 591 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 592 {
 593         if ((!src) || (!user) || (!Ptr) || (!reason))
 594         {
 595                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 596                 return;
 597         }
 598
 599         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 600
 601         if (IS_LOCAL(src))
 602         {
 603                 if (!Ptr->HasUser(user))
 604                 {
 605                         WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 606                         return;
 607                 }
 608                 int MOD_RESULT = 0;
 609
 610                 if (!is_uline(src->server))
 611                 {
 612                         MOD_RESULT = 0;
 613                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 614                         if (MOD_RESULT == 1)
 615                                 return;
 616                 }
 617                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 618                 if (MOD_RESULT != -1)
 619                 {
 620                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 621                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 622                                 return;
 623
 624                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 625                         {
 626                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 627                                 {
 628                                         if (cstatus(src,Ptr) == STATUS_HOP)
 629                                         {
 630                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 631                                         }
 632                                         else
 633                                         {
 634                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 635                                         }
 636
 637                                         return;
 638                                 }
 639                         }
 640                 }
 641         }
 642
 643         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 644
 645         for (std::vector<ucrec*>::const_iterator i = user->chans.begin(); i != user->chans.end(); i++)
 646         {
 647                 /* zap it from the channel list of the user */
 648                 if ((((ucrec*)(*i))->channel) && (((ucrec*)(*i))->channel == Ptr))
 649                 {
 650                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 651                         ((ucrec*)(*i))->uc_modes = 0;
 652                         ((ucrec*)(*i))->channel = NULL;
 653                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 654                         break;
 655                 }
 656         }
 657
 658         if (!Ptr->DelUser(user))
 659         /* if there are no users left on the channel */
 660         {
 661                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 662
 663                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 664
 665                 /* kill the record */
 666                 if (iter != chanlist.end())
 667                 {
 668                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 669                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 670                         delete Ptr;
 671                         chanlist.erase(iter);
 672                 }
 673         }
 674 }
 675
 676