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         {
  84                 static char m[3];
  85                 m[0] = mode;
  86                 m[1] = '\0';
  87                 if (!strchr(this->custom_modes,mode))
  88                 {
  89                         strlcat(custom_modes,m,MAXMODES);
  90                 }
  91                 log(DEBUG,"Custom mode %c set",mode);
  92         }
  93         else {
  94
  95                 std::string a = this->custom_modes;
  96                 int pos = a.find(mode);
  97                 a.erase(pos,1);
  98                 strlcpy(this->custom_modes,a.c_str(),MAXMODES);
  99
 100                 log(DEBUG,"Custom mode %c removed: modelist='%s'",mode,this->custom_modes);
 101                 this->SetCustomModeParam(mode,"",false);
 102         }
 103 }
 104
 105
 106 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
 107 {
 108
 109         log(DEBUG,"SetCustomModeParam called");
 110         ModeParameter M;
 111         M.mode = mode;
 112         strlcpy(M.channel,this->name,CHANMAX);
 113         strlcpy(M.parameter,parameter,MAXBUF);
 114         if (mode_on)
 115         {
 116                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
 117                 custom_mode_params.push_back(M);
 118         }
 119         else
 120         {
 121                 if (custom_mode_params.size())
 122                 {
 123                         for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 124                         {
 125                                 if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 126                                 {
 127                                         log(DEBUG,"Custom mode parameter %c %s removed",mode,parameter);
 128                                         custom_mode_params.erase(i);
 129                                         return;
 130                                 }
 131                         }
 132                 }
 133                 log(DEBUG,"*** BUG *** Attempt to remove non-existent mode parameter!");
 134         }
 135 }
 136
 137 bool chanrec::IsCustomModeSet(char mode)
 138 {
 139         return (strchr(this->custom_modes,mode));
 140 }
 141
 142 std::string chanrec::GetModeParameter(char mode)
 143 {
 144         if (custom_mode_params.size())
 145         {
 146                 for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 147                 {
 148                         if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 149                         {
 150                                 return i->parameter;
 151                         }
 152                 }
 153         }
 154         return "";
 155 }
 156
 157 long chanrec::GetUserCounter()
 158 {
 159         return (this->internal_userlist.size());
 160 }
 161
 162 void chanrec::AddUser(char* castuser)
 163 {
 164         internal_userlist[castuser] = castuser;
 165         log(DEBUG,"Added casted user to channel's internal list");
 166 }
 167
 168 void chanrec::DelUser(char* castuser)
 169 {
 170         std::map<char*,char*>::iterator a = internal_userlist.find(castuser);
 171         if (a != internal_userlist.end())
 172         {
 173                 log(DEBUG,"Removed casted user from channel's internal list");
 174                 internal_userlist.erase(a);
 175                 /* And tidy any others... */
 176                 DelOppedUser(castuser);
 177                 DelHalfoppedUser(castuser);
 178                 DelVoicedUser(castuser);
 179                 return;
 180         }
 181 }
 182
 183 void chanrec::AddOppedUser(char* castuser)
 184 {
 185         internal_op_userlist[castuser] = castuser;
 186         log(DEBUG,"Added casted user to channel's internal list");
 187 }
 188
 189 void chanrec::DelOppedUser(char* castuser)
 190 {
 191         std::map<char*,char*>::iterator a = internal_op_userlist.find(castuser);
 192         if (a != internal_op_userlist.end())
 193         {
 194                 log(DEBUG,"Removed casted user from channel's internal list");
 195                 internal_op_userlist.erase(a);
 196                 return;
 197         }
 198 }
 199
 200 void chanrec::AddHalfoppedUser(char* castuser)
 201 {
 202         internal_halfop_userlist[castuser] = castuser;
 203         log(DEBUG,"Added casted user to channel's internal list");
 204 }
 205
 206 void chanrec::DelHalfoppedUser(char* castuser)
 207 {
 208         std::map<char*,char*>::iterator a = internal_halfop_userlist.find(castuser);
 209         if (a != internal_halfop_userlist.end())
 210         {
 211                 log(DEBUG,"Removed casted user from channel's internal list");
 212                 internal_halfop_userlist.erase(a);
 213                 return;
 214         }
 215 }
 216
 217 void chanrec::AddVoicedUser(char* castuser)
 218 {
 219         internal_voice_userlist[castuser] = castuser;
 220         log(DEBUG,"Added casted user to channel's internal list");
 221 }
 222
 223 void chanrec::DelVoicedUser(char* castuser)
 224 {
 225         std::map<char*,char*>::iterator a = internal_voice_userlist.find(castuser);
 226         if (a != internal_voice_userlist.end())
 227         {
 228                 log(DEBUG,"Removed casted user from channel's internal list");
 229                 internal_voice_userlist.erase(a);
 230                 return;
 231         }
 232 }
 233
 234 std::map<char*,char*> *chanrec::GetUsers()
 235 {
 236         return &internal_userlist;
 237 }
 238
 239 std::map<char*,char*> *chanrec::GetOppedUsers()
 240 {
 241         return &internal_op_userlist;
 242 }
 243
 244 std::map<char*,char*> *chanrec::GetHalfoppedUsers()
 245 {
 246         return &internal_halfop_userlist;
 247 }
 248
 249 std::map<char*,char*> *chanrec::GetVoicedUsers()
 250 {
 251         return &internal_voice_userlist;
 252 }
 253
 254 /*
 255  * add a channel to a user, creating the record for it if needed and linking
 256  * it to the user record
 257  */
 258
 259 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 260 {
 261         if ((!user) || (!cn))
 262         {
 263                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 264                 return 0;
 265         }
 266
 267         int created = 0;
 268         char cname[MAXBUF];
 269         int MOD_RESULT = 0;
 270         strlcpy(cname,cn,CHANMAX);
 271         log(DEBUG,"cname='%s' cn='%s'",cname,cn);
 272
 273         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 274
 275         chanrec* Ptr = FindChan(cname);
 276
 277         if (!Ptr)
 278         {
 279                 if (user->fd > -1)
 280                 {
 281                         MOD_RESULT = 0;
 282                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname));
 283                         if (MOD_RESULT == 1)
 284                                 return NULL;
 285                 }
 286
 287                 /* create a new one */
 288                 chanlist[cname] = new chanrec();
 289                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 290                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 291                 chanlist[cname]->created = TIME;
 292                 *chanlist[cname]->topic = 0;
 293                 strlcpy(chanlist[cname]->setby, user->nick,NICKMAX);
 294                 chanlist[cname]->topicset = 0;
 295                 Ptr = chanlist[cname];
 296                 log(DEBUG,"add_channel: created: %s",cname);
 297                 /*
 298                  * set created to 2 to indicate user
 299                  * is the first in the channel
 300                  * and should be given ops
 301                  */
 302                 created = 2;
 303         }
 304         else
 305         {
 306                 /* Already on the channel */
 307                 if (has_channel(user,Ptr))
 308                         return NULL;
 309
 310                 /*
 311                  * remote users are allowed us to bypass channel modes
 312                  * and bans (used by servers)
 313                  */
 314                 if (IS_LOCAL(user)) /* was a check on fd > -1 */
 315                 {
 316                         MOD_RESULT = 0;
 317                         FOREACH_RESULT(I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname));
 318                         if (MOD_RESULT == 1)
 319                         {
 320                                 return NULL;
 321                         }
 322                         else if (MOD_RESULT == 0)
 323                         {
 324                                 if (*Ptr->key)
 325                                 {
 326                                         MOD_RESULT = 0;
 327                                         FOREACH_RESULT(I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 328                                         if (!MOD_RESULT)
 329                                         {
 330                                                 if (!key)
 331                                                 {
 332                                                         log(DEBUG,"add_channel: no key given in JOIN");
 333                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 334                                                         return NULL;
 335                                                 }
 336                                                 else
 337                                                 {
 338                                                         if (strcmp(key,Ptr->key))
 339                                                         {
 340                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 341                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 342                                                                 return NULL;
 343                                                         }
 344                                                 }
 345                                         }
 346                                 }
 347                                 if (Ptr->binarymodes & CM_INVITEONLY)
 348                                 {
 349                                         MOD_RESULT = 0;
 350                                         irc::string xname(Ptr->name);
 351                                         FOREACH_RESULT(I_OnCheckInvite,OnCheckInvite(user, Ptr));
 352                                         if (!MOD_RESULT)
 353                                         {
 354                                                 log(DEBUG,"add_channel: channel is +i");
 355                                                 if (user->IsInvited(xname))
 356                                                 {
 357                                                         /* user was invited to channel */
 358                                                         /* there may be an optional channel NOTICE here */
 359                                                 }
 360                                                 else
 361                                                 {
 362                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 363                                                         return NULL;
 364                                                 }
 365                                         }
 366                                         user->RemoveInvite(xname);
 367                                 }
 368                                 if (Ptr->limit)
 369                                 {
 370                                         MOD_RESULT = 0;
 371                                         FOREACH_RESULT(I_OnCheckLimit,OnCheckLimit(user, Ptr));
 372                                         if (!MOD_RESULT)
 373                                         {
 374                                                 if (usercount(Ptr) >= Ptr->limit)
 375                                                 {
 376                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 377                                                         return NULL;
 378                                                 }
 379                                         }
 380                                 }
 381                                 if (Ptr->bans.size())
 382                                 {
 383                                         log(DEBUG,"add_channel: about to walk banlist");
 384                                         MOD_RESULT = 0;
 385                                         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, Ptr));
 386                                         if (!MOD_RESULT)
 387                                         {
 388                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 389                                                 {
 390                                                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match((char*)inet_ntoa(user->ip4),i->data)))
 391                                                         {
 392                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 393                                                                 return NULL;
 394                                                         }
 395                                                 }
 396                                         }
 397                                 }
 398                         }
 399                 }
 400                 else
 401                 {
 402                         log(DEBUG,"Overridden checks");
 403                 }
 404                 created = 1;
 405         }
 406
 407         log(DEBUG,"Passed channel checks");
 408
 409         for (unsigned int index =0; index < user->chans.size(); index++)
 410         {
 411                 if (user->chans[index].channel == NULL)
 412                 {
 413                         return ForceChan(Ptr,user->chans[index],user,created);
 414                 }
 415         }
 416
 417         /*
 418          * XXX: If the user is an oper here, we can just extend their user->chans vector by one
 419          * and put the channel in here. Same for remote users which are not bound by
 420          * the channel limits. Otherwise, nope, youre boned.
 421          */
 422         if (!IS_LOCAL(user)) /* was a check on fd < 0 */
 423         {
 424                 ucrec a;
 425                 chanrec* c = ForceChan(Ptr,a,user,created);
 426                 user->chans.push_back(a);
 427                 return c;
 428         }
 429         else if (*user->oper)
 430         {
 431                 /* Oper allows extension up to the OPERMAXCHANS value */
 432                 if (user->chans.size() < OPERMAXCHANS)
 433                 {
 434                         ucrec a;
 435                         chanrec* c = ForceChan(Ptr,a,user,created);
 436                         user->chans.push_back(a);
 437                         return c;
 438                 }
 439         }
 440
 441         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 442         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 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((char*)user);
 453         }
 454         else
 455         {
 456                 a.uc_modes = 0;
 457         }
 458
 459         a.channel = Ptr;
 460         Ptr->AddUser((char*)user);
 461         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 462         log(DEBUG,"Sent JOIN to client");
 463
 464         if (Ptr->topicset)
 465         {
 466                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 467                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 468         }
 469
 470         userlist(user,Ptr);
 471         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 472         FOREACH_MOD(I_OnUserJoin,OnUserJoin(user,Ptr));
 473         return Ptr;
 474 }
 475
 476 /*
 477  *remove a channel from a users record, and remove the record from memory
 478  * if the channel has become empty
 479  */
 480
 481 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 482 {
 483         if ((!user) || (!cname))
 484         {
 485                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 486                 return NULL;
 487         }
 488
 489         chanrec* Ptr = FindChan(cname);
 490
 491         if (!Ptr)
 492                 return NULL;
 493
 494         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 495
 496         for (unsigned int i =0; i < user->chans.size(); i++)
 497         {
 498                 /* zap it from the channel list of the user */
 499                 if (user->chans[i].channel == Ptr)
 500                 {
 501                         if (reason)
 502                         {
 503                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,reason));
 504                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 505                         }
 506                         else
 507                         {
 508                                 FOREACH_MOD(I_OnUserPart,OnUserPart(user,Ptr,""));
 509                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 510                         }
 511                         user->chans[i].uc_modes = 0;
 512                         user->chans[i].channel = NULL;
 513                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 514                         break;
 515                 }
 516         }
 517
 518         Ptr->DelUser((char*)user);
 519
 520         /* if there are no users left on the channel */
 521         if (!usercount(Ptr))
 522         {
 523                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 524
 525                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 526
 527                 /* kill the record */
 528                 if (iter != chanlist.end())
 529                 {
 530                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 531                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 532                         delete Ptr;
 533                         chanlist.erase(iter);
 534                 }
 535         }
 536
 537         return NULL;
 538 }
 539
 540 void server_kick_channel(userrec* user, chanrec* Ptr, char* reason, bool triggerevents)
 541 {
 542         if ((!user) || (!Ptr) || (!reason))
 543         {
 544                 return;
 545         }
 546
 547         if (IS_LOCAL(user))
 548         {
 549                 if (!has_channel(user,Ptr))
 550                 {
 551                         /* Not on channel */
 552                         return;
 553                 }
 554         }
 555
 556         if (triggerevents)
 557         {
 558                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL,user,Ptr,reason));
 559         }
 560
 561         for (unsigned int i =0; i < user->chans.size(); i++)
 562         {
 563                 if (user->chans[i].channel)
 564                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 565                 {
 566                         WriteChannelWithServ(Config->ServerName,Ptr,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 567                         user->chans[i].uc_modes = 0;
 568                         user->chans[i].channel = NULL;
 569                         break;
 570                 }
 571         }
 572
 573         Ptr->DelUser((char*)user);
 574
 575         if (!usercount(Ptr))
 576         {
 577                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 578                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 579                 /* kill the record */
 580                 if (iter != chanlist.end())
 581                 {
 582                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 583                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 584                         delete Ptr;
 585                         chanlist.erase(iter);
 586                 }
 587         }
 588 }
 589
 590 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 591 {
 592         if ((!src) || (!user) || (!Ptr) || (!reason))
 593         {
 594                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 595                 return;
 596         }
 597
 598         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 599
 600         if (IS_LOCAL(src))
 601         {
 602                 if (!has_channel(user,Ptr))
 603                 {
 604                         WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 605                         return;
 606                 }
 607                 int MOD_RESULT = 0;
 608
 609                 if (!is_uline(src->server))
 610                 {
 611                         MOD_RESULT = 0;
 612                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,Ptr,reason));
 613                         if (MOD_RESULT == 1)
 614                                 return;
 615                 }
 616                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 617                 if (MOD_RESULT != -1)
 618                 {
 619                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,Ptr,AC_KICK));
 620                         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 621                                 return;
 622
 623                         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 624                         {
 625                                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 626                                 {
 627                                         if (cstatus(src,Ptr) == STATUS_HOP)
 628                                         {
 629                                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 630                                         }
 631                                         else
 632                                         {
 633                                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator",src->nick, Ptr->name);
 634                                         }
 635
 636                                         return;
 637                                 }
 638                         }
 639                 }
 640         }
 641
 642         FOREACH_MOD(I_OnUserKick,OnUserKick(src,user,Ptr,reason));
 643
 644         for (unsigned int i =0; i < user->chans.size(); i++)
 645         {
 646                 /* zap it from the channel list of the user */
 647                 if (user->chans[i].channel)
 648                 {
 649                         if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 650                         {
 651                                 WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 652                                 user->chans[i].uc_modes = 0;
 653                                 user->chans[i].channel = NULL;
 654                                 log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 655                                 break;
 656                         }
 657                 }
 658         }
 659
 660         Ptr->DelUser((char*)user);
 661
 662         /* if there are no users left on the channel */
 663         if (!usercount(Ptr))
 664         {
 665                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 666
 667                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 668
 669                 /* kill the record */
 670                 if (iter != chanlist.end())
 671                 {
 672                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 673                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(Ptr));
 674                         delete Ptr;
 675                         chanlist.erase(iter);
 676                 }
 677         }
 678 }
 679
 680