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