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 std::vector<ModeParameter> custom_mode_params;
  70
  71 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created);
  72
  73 chanrec::chanrec()
  74 {
  75         *name = *custom_modes = *topic = *setby = *key = 0;
  76         created = topicset = limit = binarymodes = 0;
  77         internal_userlist.clear();
  78 }
  79
  80 void chanrec::SetCustomMode(char mode,bool mode_on)
  81 {
  82         if (mode_on) {
  83                 static char m[3];
  84                 m[0] = mode;
  85                 m[1] = '\0';
  86                 if (!strchr(this->custom_modes,mode))
  87                 {
  88                         strlcat(custom_modes,m,MAXMODES);
  89                 }
  90                 log(DEBUG,"Custom mode %c set",mode);
  91         }
  92         else {
  93
  94                 std::string a = this->custom_modes;
  95                 int pos = a.find(mode);
  96                 a.erase(pos,1);
  97                 strlcpy(this->custom_modes,a.c_str(),MAXMODES);
  98
  99                 log(DEBUG,"Custom mode %c removed: modelist='%s'",mode,this->custom_modes);
 100                 this->SetCustomModeParam(mode,"",false);
 101         }
 102 }
 103
 104
 105 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
 106 {
 107
 108         log(DEBUG,"SetCustomModeParam called");
 109         ModeParameter M;
 110         M.mode = mode;
 111         strlcpy(M.channel,this->name,CHANMAX);
 112         strlcpy(M.parameter,parameter,MAXBUF);
 113         if (mode_on)
 114         {
 115                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
 116                 custom_mode_params.push_back(M);
 117         }
 118         else
 119         {
 120                 if (custom_mode_params.size())
 121                 {
 122                         for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 123                         {
 124                                 if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 125                                 {
 126                                         log(DEBUG,"Custom mode parameter %c %s removed",mode,parameter);
 127                                         custom_mode_params.erase(i);
 128                                         return;
 129                                 }
 130                         }
 131                 }
 132                 log(DEBUG,"*** BUG *** Attempt to remove non-existent mode parameter!");
 133         }
 134 }
 135
 136 bool chanrec::IsCustomModeSet(char mode)
 137 {
 138         return (strchr(this->custom_modes,mode));
 139 }
 140
 141 std::string chanrec::GetModeParameter(char mode)
 142 {
 143         if (custom_mode_params.size())
 144         {
 145                 for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 146                 {
 147                         if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 148                         {
 149                                 return i->parameter;
 150                         }
 151                 }
 152         }
 153         return "";
 154 }
 155
 156 long chanrec::GetUserCounter()
 157 {
 158         return (this->internal_userlist.size());
 159 }
 160
 161 void chanrec::AddUser(char* castuser)
 162 {
 163         internal_userlist[castuser] = castuser;
 164         log(DEBUG,"Added casted user to channel's internal list");
 165 }
 166
 167 void chanrec::DelUser(char* castuser)
 168 {
 169         std::map<char*,char*>::iterator a = internal_userlist.find(castuser);
 170         if (a != internal_userlist.end())
 171         {
 172                 log(DEBUG,"Removed casted user from channel's internal list");
 173                 internal_userlist.erase(a);
 174                 return;
 175         }
 176         log(DEBUG,"BUG BUG BUG! Attempt to remove an uncasted user from the internal list of %s!",name);
 177 }
 178
 179 std::map<char*,char*> *chanrec::GetUsers()
 180 {
 181         return &internal_userlist;
 182 }
 183
 184 /* add a channel to a user, creating the record for it if needed and linking
 185  * it to the user record */
 186
 187 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 188 {
 189         if ((!user) || (!cn))
 190         {
 191                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 192                 return 0;
 193         }
 194
 195         int created = 0;
 196         char cname[MAXBUF];
 197         int MOD_RESULT = 0;
 198         strlcpy(cname,cn,CHANMAX);
 199         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 200
 201         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 202
 203         chanrec* Ptr = FindChan(cname);
 204
 205         if (!Ptr)
 206         {
 207                 if (user->fd > -1)
 208                 {
 209                         MOD_RESULT = 0;
 210                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 211                         if (MOD_RESULT == 1)
 212                                 return NULL;
 213                 }
 214                 /* create a new one */
 215                 chanlist[cname] = new chanrec();
 216                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 217                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 218                 chanlist[cname]->created = TIME;
 219                 *chanlist[cname]->topic = 0;
 220                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX);
 221                 chanlist[cname]->topicset = 0;
 222                 Ptr = chanlist[cname];
 223                 log(DEBUG,"add_channel: created: %s",cname);
 224                 /* set created to 2 to indicate user
 225                  * is the first in the channel
 226                  * and should be given ops */
 227                 created = 2;
 228         }
 229         else
 230         {
 231                 /* Already on the channel */
 232                 if (has_channel(user,Ptr))
 233                         return NULL;
 234
 235                 // remote users are allowed us to bypass channel modes
 236                 // and bans (used by servers)
 237                 if (user->fd > -1)
 238                 {
 239                         MOD_RESULT = 0;
 240                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 241                         if (MOD_RESULT == 1)
 242                         {
 243                                 return NULL;
 244                         }
 245                         else if (MOD_RESULT == 0)
 246                         {
 247                                 if (*Ptr->key)
 248                                 {
 249                                         MOD_RESULT = 0;
 250                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 251                                         if (!MOD_RESULT)
 252                                         {
 253                                                 if (!key)
 254                                                 {
 255                                                         log(DEBUG,"add_channel: no key given in JOIN");
 256                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 257                                                         return NULL;
 258                                                 }
 259                                                 else
 260                                                 {
 261                                                         if (strcasecmp(key,Ptr->key))
 262                                                         {
 263                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 264                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 265                                                                 return NULL;
 266                                                         }
 267                                                 }
 268                                         }
 269                                 }
 270                                 if (Ptr->binarymodes & CM_INVITEONLY)
 271                                 {
 272                                         MOD_RESULT = 0;
 273                                         irc::string xname(Ptr->name);
 274                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 275                                         if (!MOD_RESULT)
 276                                         {
 277                                                 log(DEBUG,"add_channel: channel is +i");
 278                                                 if (user->IsInvited(xname))
 279                                                 {
 280                                                         /* user was invited to channel */
 281                                                         /* there may be an optional channel NOTICE here */
 282                                                 }
 283                                                 else
 284                                                 {
 285                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 286                                                         return NULL;
 287                                                 }
 288                                         }
 289                                         user->RemoveInvite(xname);
 290                                 }
 291                                 if (Ptr->limit)
 292                                 {
 293                                         MOD_RESULT = 0;
 294                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 295                                         if (!MOD_RESULT)
 296                                         {
 297                                                 if (usercount(Ptr) >= Ptr->limit)
 298                                                 {
 299                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 300                                                         return NULL;
 301                                                 }
 302                                         }
 303                                 }
 304                                 if (Ptr->bans.size())
 305                                 {
 306                                         log(DEBUG,"add_channel: about to walk banlist");
 307                                         MOD_RESULT = 0;
 308                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 309                                         if (!MOD_RESULT)
 310                                         {
 311                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 312                                                 {
 313                                                         if (match(user->GetFullHost(),i->data))
 314                                                         {
 315                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 316                                                                 return NULL;
 317                                                         }
 318                                                 }
 319                                         }
 320                                 }
 321                         }
 322                 }
 323                 else
 324                 {
 325                         log(DEBUG,"Overridden checks");
 326                 }
 327                 created = 1;
 328         }
 329
 330         log(DEBUG,"Passed channel checks");
 331
 332         for (unsigned int index =0; index < user->chans.size(); index++)
 333         {
 334                 if (user->chans[index].channel == NULL)
 335                 {
 336                         return ForceChan(Ptr,user->chans[index],user,created);
 337                 }
 338         }
 339         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 340          * and put the channel in here. Same for remote users which are not bound by
 341          * the channel limits. Otherwise, nope, youre boned.
 342          */
 343         if (user->fd < 0)
 344         {
 345                 ucrec a;
 346                 chanrec* c = ForceChan(Ptr,a,user,created);
 347                 user->chans.push_back(a);
 348                 return c;
 349         }
 350         else if (strchr(user->modes,'o'))
 351         {
 352                 /* Oper allows extension up to the OPERMAXCHANS value */
 353                 if (user->chans.size() < OPERMAXCHANS)
 354                 {
 355                         ucrec a;
 356                         chanrec* c = ForceChan(Ptr,a,user,created);
 357                         user->chans.push_back(a);
 358                         return c;
 359                 }
 360         }
 361         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 362         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 363         return NULL;
 364 }
 365
 366 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 367 {
 368         if (created == 2)
 369         {
 370                 /* first user in is given ops */
 371                 a.uc_modes = UCMODE_OP;
 372         }
 373         else
 374         {
 375                 a.uc_modes = 0;
 376         }
 377         a.channel = Ptr;
 378         Ptr->AddUser((char*)user);
 379         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 380         log(DEBUG,"Sent JOIN to client");
 381         if (Ptr->topicset)
 382         {
 383                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 384                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 385         }
 386         userlist(user,Ptr);
 387         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 388         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 389         return Ptr;
 390 }
 391
 392 /* remove a channel from a users record, and remove the record from memory
 393  * if the channel has become empty */
 394
 395 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 396 {
 397         if ((!user) || (!cname))
 398         {
 399                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 400                 return NULL;
 401         }
 402
 403         chanrec* Ptr = FindChan(cname);
 404
 405         if (!Ptr)
 406                 return NULL;
 407
 408         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 409
 410         for (unsigned int i =0; i < user->chans.size(); i++)
 411         {
 412                 /* zap it from the channel list of the user */
 413                 if (user->chans[i].channel == Ptr)
 414                 {
 415                         if (reason)
 416                         {
 417                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 418                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 419                         }
 420                         else
 421                         {
 422                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 423                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 424                         }
 425                         user->chans[i].uc_modes = 0;
 426                         user->chans[i].channel = NULL;
 427                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 428                         break;
 429                 }
 430         }
 431
 432         Ptr->DelUser((char*)user);
 433
 434         /* if there are no users left on the channel */
 435         if (!usercount(Ptr))
 436         {
 437                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 438
 439                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 440
 441                 /* kill the record */
 442                 if (iter != chanlist.end())
 443                 {
 444                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 445                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 446                         delete Ptr;
 447                         chanlist.erase(iter);
 448                 }
 449         }
 450
 451         return NULL;
 452 }
 453
 454 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 455 {
 456         if ((!user) || (!Ptr) || (!reason))
 457         {
 458                 return;
 459         }
 460
 461         if (!has_channel(user,Ptr))
 462         {
 463                 /* Not on channel */
 464                 return;
 465         }
 466
 467         if (triggerevents)
 468         {
 469                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 470         }
 471
 472         for (unsigned int i =0; i < user->chans.size(); i++)
 473         {
 474                 if (user->chans[i].channel)
 475                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 476                 {
 477                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 478                         user->chans[i].uc_modes = 0;
 479                         user->chans[i].channel = NULL;
 480                         break;
 481                 }
 482         }
 483
 484         Ptr->DelUser((char*)user);
 485
 486         if (!usercount(Ptr))
 487         {
 488                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 489                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 490                 /* kill the record */
 491                 if (iter != chanlist.end())
 492                 {
 493                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 494                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 495                         delete Ptr;
 496                         chanlist.erase(iter);
 497                 }
 498         }
 499 }
 500
 501 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 502 {
 503         if ((!src) || (!user) || (!Ptr) || (!reason))
 504         {
 505                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 506                 return;
 507         }
 508
 509         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 510
 511         if (!has_channel(user,Ptr))
 512         {
 513                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 514                 return;
 515         }
 516
 517         int MOD_RESULT = 0;
 518         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 519         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 520                 return;
 521
 522         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 523         {
 524                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 525                 {
 526                         if (cstatus(src,Ptr) == STATUS_HOP)
 527                         {
 528                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 529                         }
 530                         else
 531                         {
 532                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 533                         }
 534
 535                         return;
 536                 }
 537         }
 538
 539         if (!is_uline(src->server))
 540         {
 541                 MOD_RESULT = 0;
 542                 FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 543                 if (MOD_RESULT)
 544                         return;
 545         }
 546
 547         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 548
 549         for (unsigned int i =0; i < user->chans.size(); i++)
 550         {
 551                 /* zap it from the channel list of the user */
 552                 if (user->chans[i].channel)
 553                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 554                 {
 555                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 556                         user->chans[i].uc_modes = 0;
 557                         user->chans[i].channel = NULL;
 558                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 559                         break;
 560                 }
 561         }
 562
 563         Ptr->DelUser((char*)user);
 564
 565         /* if there are no users left on the channel */
 566         if (!usercount(Ptr))
 567         {
 568                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 569
 570                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 571
 572                 /* kill the record */
 573                 if (iter != chanlist.end())
 574                 {
 575                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 576                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 577                         delete Ptr;
 578                         chanlist.erase(iter);
 579                 }
 580         }
 581 }
 582
 583