src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 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                 strncpy(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.push_back(castuser);
 164         log(DEBUG,"Added casted user to channel's internal list");
 165 }
 166
 167 void chanrec::DelUser(char* castuser)
 168 {
 169         for (std::vector<char*>::iterator a = internal_userlist.begin(); a < internal_userlist.end(); a++)
 170         {
 171                 if (*a == castuser)
 172                 {
 173                         log(DEBUG,"Removed casted user from channel's internal list");
 174                         internal_userlist.erase(a);
 175                         return;
 176                 }
 177         }
 178         log(DEBUG,"BUG BUG BUG! Attempt to remove an uncasted user from the internal list of %s!",name);
 179 }
 180
 181 std::vector<char*> *chanrec::GetUsers()
 182 {
 183         return &internal_userlist;
 184 }
 185
 186 /* add a channel to a user, creating the record for it if needed and linking
 187  * it to the user record */
 188
 189 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 190 {
 191         if ((!user) || (!cn))
 192         {
 193                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 194                 return 0;
 195         }
 196
 197         int created = 0;
 198         char cname[MAXBUF];
 199         int MOD_RESULT = 0;
 200         strncpy(cname,cn,CHANMAX);
 201
 202         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 203
 204         chanrec* Ptr = FindChan(cname);
 205
 206         if (!Ptr)
 207         {
 208                 if (user->fd > -1)
 209                 {
 210                         MOD_RESULT = 0;
 211                         FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
 212                         if (MOD_RESULT == 1)
 213                                 return NULL;
 214                 }
 215                 /* create a new one */
 216                 chanlist[cname] = new chanrec();
 217                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 218                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 219                 chanlist[cname]->created = TIME;
 220                 *chanlist[cname]->topic = 0;
 221                 strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
 222                 chanlist[cname]->topicset = 0;
 223                 Ptr = chanlist[cname];
 224                 log(DEBUG,"add_channel: created: %s",cname);
 225                 /* set created to 2 to indicate user
 226                  * is the first in the channel
 227                  * and should be given ops */
 228                 created = 2;
 229         }
 230         else
 231         {
 232                 /* Already on the channel */
 233                 if (has_channel(user,Ptr))
 234                         return NULL;
 235
 236                 // remote users are allowed us to bypass channel modes
 237                 // and bans (used by servers)
 238                 if (user->fd > -1)
 239                 {
 240                         MOD_RESULT = 0;
 241                         FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
 242                         if (MOD_RESULT == 1)
 243                         {
 244                                 return NULL;
 245                         }
 246                         else
 247                         {
 248                                 if (*Ptr->key)
 249                                 {
 250                                         MOD_RESULT = 0;
 251                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
 252                                         if (!MOD_RESULT)
 253                                         {
 254                                                 if (!key)
 255                                                 {
 256                                                         log(DEBUG,"add_channel: no key given in JOIN");
 257                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 258                                                         return NULL;
 259                                                 }
 260                                                 else
 261                                                 {
 262                                                         if (strcasecmp(key,Ptr->key))
 263                                                         {
 264                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 265                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 266                                                                 return NULL;
 267                                                         }
 268                                                 }
 269                                         }
 270                                 }
 271                                 if (Ptr->binarymodes & CM_INVITEONLY)
 272                                 {
 273                                         MOD_RESULT = 0;
 274                                         irc::string xname(Ptr->name);
 275                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 276                                         if (!MOD_RESULT)
 277                                         {
 278                                                 log(DEBUG,"add_channel: channel is +i");
 279                                                 if (user->IsInvited(xname))
 280                                                 {
 281                                                         /* user was invited to channel */
 282                                                         /* there may be an optional channel NOTICE here */
 283                                                 }
 284                                                 else
 285                                                 {
 286                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 287                                                         return NULL;
 288                                                 }
 289                                         }
 290                                         user->RemoveInvite(xname);
 291                                 }
 292                                 if (Ptr->limit)
 293                                 {
 294                                         MOD_RESULT = 0;
 295                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 296                                         if (!MOD_RESULT)
 297                                         {
 298                                                 if (usercount(Ptr) >= Ptr->limit)
 299                                                 {
 300                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 301                                                         return NULL;
 302                                                 }
 303                                         }
 304                                 }
 305                                 if (Ptr->bans.size())
 306                                 {
 307                                         log(DEBUG,"add_channel: about to walk banlist");
 308                                         MOD_RESULT = 0;
 309                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 310                                         if (!MOD_RESULT)
 311                                         {
 312                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 313                                                 {
 314                                                         if (match(user->GetFullHost(),i->data))
 315                                                         {
 316                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 317                                                                 return NULL;
 318                                                         }
 319                                                 }
 320                                         }
 321                                 }
 322                         }
 323                 }
 324                 else
 325                 {
 326                         log(DEBUG,"Overridden checks");
 327                 }
 328                 created = 1;
 329         }
 330
 331         log(DEBUG,"Passed channel checks");
 332
 333         for (unsigned int index =0; index < user->chans.size(); index++)
 334         {
 335                 if (user->chans[index].channel == NULL)
 336                 {
 337                         return ForceChan(Ptr,user->chans[index],user,created);
 338                 }
 339         }
 340         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 341          * and put the channel in here. Same for remote users which are not bound by
 342          * the channel limits. Otherwise, nope, youre boned.
 343          */
 344         if (user->fd < 0)
 345         {
 346                 ucrec a;
 347                 chanrec* c = ForceChan(Ptr,a,user,created);
 348                 user->chans.push_back(a);
 349                 return c;
 350         }
 351         else if (strchr(user->modes,'o'))
 352         {
 353                 /* Oper allows extension up to the OPERMAXCHANS value */
 354                 if (user->chans.size() < OPERMAXCHANS)
 355                 {
 356                         ucrec a;
 357                         chanrec* c = ForceChan(Ptr,a,user,created);
 358                         user->chans.push_back(a);
 359                         return c;
 360                 }
 361         }
 362         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 363         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 364         return NULL;
 365 }
 366
 367 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 368 {
 369         if (created == 2)
 370         {
 371                 /* first user in is given ops */
 372                 a.uc_modes = UCMODE_OP;
 373         }
 374         else
 375         {
 376                 a.uc_modes = 0;
 377         }
 378         a.channel = Ptr;
 379         Ptr->AddUser((char*)user);
 380         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 381         log(DEBUG,"Sent JOIN to client");
 382         if (Ptr->topicset)
 383         {
 384                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 385                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 386         }
 387         userlist(user,Ptr);
 388         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 389         FOREACH_MOD OnUserJoin(user,Ptr);
 390         return Ptr;
 391 }
 392
 393 /* remove a channel from a users record, and remove the record from memory
 394  * if the channel has become empty */
 395
 396 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 397 {
 398         if ((!user) || (!cname))
 399         {
 400                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 401                 return NULL;
 402         }
 403
 404         chanrec* Ptr = FindChan(cname);
 405
 406         if (!Ptr)
 407                 return NULL;
 408
 409         FOREACH_MOD OnUserPart(user,Ptr);
 410         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 411
 412         for (unsigned int i =0; i < user->chans.size(); i++)
 413         {
 414                 /* zap it from the channel list of the user */
 415                 if (user->chans[i].channel == Ptr)
 416                 {
 417                         if (reason)
 418                         {
 419                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 420                         }
 421                         else
 422                         {
 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                         delete Ptr;
 446                         chanlist.erase(iter);
 447                 }
 448         }
 449
 450         return NULL;
 451 }
 452
 453
 454 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 455 {
 456         if ((!src) || (!user) || (!Ptr) || (!reason))
 457         {
 458                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 459                 return;
 460         }
 461
 462         if ((!Ptr) || (!user) || (!src))
 463         {
 464                 return;
 465         }
 466
 467         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 468
 469         if (!has_channel(user,Ptr))
 470         {
 471                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 472                 return;
 473         }
 474
 475         int MOD_RESULT = 0;
 476         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 477         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 478                 return;
 479
 480         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 481         {
 482                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 483                 {
 484                         if (cstatus(src,Ptr) == STATUS_HOP)
 485                         {
 486                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 487                         }
 488                         else
 489                         {
 490                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 491                         }
 492
 493                         return;
 494                 }
 495         }
 496
 497         if (!is_uline(src->server))
 498         {
 499                 MOD_RESULT = 0;
 500                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 501                 if (MOD_RESULT)
 502                         return;
 503         }
 504
 505         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 506
 507         for (unsigned int i =0; i < user->chans.size(); i++)
 508         {
 509                 /* zap it from the channel list of the user */
 510                 if (user->chans[i].channel)
 511                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 512                 {
 513                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 514                         user->chans[i].uc_modes = 0;
 515                         user->chans[i].channel = NULL;
 516                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 517                         break;
 518                 }
 519         }
 520
 521         Ptr->DelUser((char*)user);
 522
 523         /* if there are no users left on the channel */
 524         if (!usercount(Ptr))
 525         {
 526                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 527
 528                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 529
 530                 /* kill the record */
 531                 if (iter != chanlist.end())
 532                 {
 533                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 534                         delete Ptr;
 535                         chanlist.erase(iter);
 536                 }
 537         }
 538 }
 539
 540