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 "inspircd_util.h"
  23 #include <unistd.h>
  24 #include <sys/errno.h>
  25 #include <sys/ioctl.h>
  26 #include <sys/utsname.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #include "users.h"
  39 #include "ctables.h"
  40 #include "globals.h"
  41 #include "modules.h"
  42 #include "dynamic.h"
  43 #include "commands.h"
  44 #include "wildcard.h"
  45 #include "message.h"
  46 #include "mode.h"
  47 #include "xline.h"
  48 #include "inspstring.h"
  49 #include "helperfuncs.h"
  50 #include "typedefs.h"
  51
  52 #ifdef GCC3
  53 #define nspace __gnu_cxx
  54 #else
  55 #define nspace std
  56 #endif
  57
  58 extern ServerConfig* Config;
  59
  60 extern int MODCOUNT;
  61 extern std::vector<Module*> modules;
  62 extern std::vector<ircd_module*> factory;
  63 extern int WHOWAS_STALE;
  64 extern int WHOWAS_MAX;
  65 extern time_t startup_time;
  66 extern std::vector<std::string> module_names;
  67 extern int boundPortCount;
  68 extern std::stringstream config_f;
  69 extern time_t TIME;
  70 extern chan_hash chanlist;
  71
  72 using namespace std;
  73
  74 std::vector<ModeParameter> custom_mode_params;
  75
  76 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created);
  77
  78 chanrec::chanrec()
  79 {
  80         strcpy(name,"");
  81         strcpy(custom_modes,"");
  82         strcpy(topic,"");
  83         strcpy(setby,"");
  84         strcpy(key,"");
  85         created = topicset = limit = 0;
  86         binarymodes = 0;
  87         internal_userlist.clear();
  88 }
  89
  90 void chanrec::SetCustomMode(char mode,bool mode_on)
  91 {
  92         if (mode_on) {
  93                 static char m[3];
  94                 m[0] = mode;
  95                 m[1] = '\0';
  96                 if (!strchr(this->custom_modes,mode))
  97                 {
  98                         strlcat(custom_modes,m,MAXMODES);
  99                 }
 100                 log(DEBUG,"Custom mode %c set",mode);
 101         }
 102         else {
 103
 104                 std::string a = this->custom_modes;
 105                 int pos = a.find(mode);
 106                 a.erase(pos,1);
 107                 strncpy(this->custom_modes,a.c_str(),MAXMODES);
 108
 109                 log(DEBUG,"Custom mode %c removed: modelist='%s'",mode,this->custom_modes);
 110                 this->SetCustomModeParam(mode,"",false);
 111         }
 112 }
 113
 114
 115 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
 116 {
 117
 118         log(DEBUG,"SetCustomModeParam called");
 119         ModeParameter M;
 120         M.mode = mode;
 121         strlcpy(M.channel,this->name,CHANMAX);
 122         strlcpy(M.parameter,parameter,MAXBUF);
 123         if (mode_on)
 124         {
 125                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
 126                 custom_mode_params.push_back(M);
 127         }
 128         else
 129         {
 130                 if (custom_mode_params.size())
 131                 {
 132                         for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 133                         {
 134                                 if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 135                                 {
 136                                         log(DEBUG,"Custom mode parameter %c %s removed",mode,parameter);
 137                                         custom_mode_params.erase(i);
 138                                         return;
 139                                 }
 140                         }
 141                 }
 142                 log(DEBUG,"*** BUG *** Attempt to remove non-existent mode parameter!");
 143         }
 144 }
 145
 146 bool chanrec::IsCustomModeSet(char mode)
 147 {
 148         return (strchr(this->custom_modes,mode));
 149 }
 150
 151 std::string chanrec::GetModeParameter(char mode)
 152 {
 153         if (custom_mode_params.size())
 154         {
 155                 for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
 156                 {
 157                         if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
 158                         {
 159                                 return i->parameter;
 160                         }
 161                 }
 162         }
 163         return "";
 164 }
 165
 166 long chanrec::GetUserCounter()
 167 {
 168         return (this->internal_userlist.size());
 169 }
 170
 171 void chanrec::AddUser(char* castuser)
 172 {
 173         internal_userlist.push_back(castuser);
 174         log(DEBUG,"Added casted user to channel's internal list");
 175 }
 176
 177 void chanrec::DelUser(char* castuser)
 178 {
 179         for (std::vector<char*>::iterator a = internal_userlist.begin(); a < internal_userlist.end(); a++)
 180         {
 181                 if (*a == castuser)
 182                 {
 183                         log(DEBUG,"Removed casted user from channel's internal list");
 184                         internal_userlist.erase(a);
 185                         return;
 186                 }
 187         }
 188         log(DEBUG,"BUG BUG BUG! Attempt to remove an uncasted user from the internal list of %s!",name);
 189 }
 190
 191 std::vector<char*> *chanrec::GetUsers()
 192 {
 193         return &internal_userlist;
 194 }
 195
 196 /* add a channel to a user, creating the record for it if needed and linking
 197  * it to the user record */
 198
 199 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 200 {
 201         if ((!user) || (!cn))
 202         {
 203                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 204                 return 0;
 205         }
 206
 207         int created = 0;
 208         char cname[MAXBUF];
 209         int MOD_RESULT = 0;
 210         strncpy(cname,cn,CHANMAX);
 211
 212         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 213
 214         chanrec* Ptr = FindChan(cname);
 215
 216         if (!Ptr)
 217         {
 218                 if (user->fd > -1)
 219                 {
 220                         MOD_RESULT = 0;
 221                         FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
 222                         if (MOD_RESULT == 1)
 223                                 return NULL;
 224                 }
 225                 /* create a new one */
 226                 chanlist[cname] = new chanrec();
 227                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
 228                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 229                 chanlist[cname]->created = TIME;
 230                 strcpy(chanlist[cname]->topic, "");
 231                 strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
 232                 chanlist[cname]->topicset = 0;
 233                 Ptr = chanlist[cname];
 234                 log(DEBUG,"add_channel: created: %s",cname);
 235                 /* set created to 2 to indicate user
 236                  * is the first in the channel
 237                  * and should be given ops */
 238                 created = 2;
 239         }
 240         else
 241         {
 242                 /* Already on the channel */
 243                 if (has_channel(user,Ptr))
 244                         return NULL;
 245
 246                 // remote users are allowed us to bypass channel modes
 247                 // and bans (used by servers)
 248                 if (user->fd > -1)
 249                 {
 250                         MOD_RESULT = 0;
 251                         FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
 252                         if (MOD_RESULT == 1)
 253                         {
 254                                 return NULL;
 255                         }
 256                         else
 257                         {
 258                                 if (*Ptr->key)
 259                                 {
 260                                         MOD_RESULT = 0;
 261                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
 262                                         if (!MOD_RESULT)
 263                                         {
 264                                                 if (!key)
 265                                                 {
 266                                                         log(DEBUG,"add_channel: no key given in JOIN");
 267                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 268                                                         return NULL;
 269                                                 }
 270                                                 else
 271                                                 {
 272                                                         if (strcasecmp(key,Ptr->key))
 273                                                         {
 274                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
 275                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 276                                                                 return NULL;
 277                                                         }
 278                                                 }
 279                                         }
 280                                 }
 281                                 if (Ptr->binarymodes & CM_INVITEONLY)
 282                                 {
 283                                         MOD_RESULT = 0;
 284                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 285                                         if (!MOD_RESULT)
 286                                         {
 287                                                 log(DEBUG,"add_channel: channel is +i");
 288                                                 if (user->IsInvited(Ptr->name))
 289                                                 {
 290                                                         /* user was invited to channel */
 291                                                         /* there may be an optional channel NOTICE here */
 292                                                 }
 293                                                 else
 294                                                 {
 295                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 296                                                         return NULL;
 297                                                 }
 298                                         }
 299                                         user->RemoveInvite(Ptr->name);
 300                                 }
 301                                 if (Ptr->limit)
 302                                 {
 303                                         MOD_RESULT = 0;
 304                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 305                                         if (!MOD_RESULT)
 306                                         {
 307                                                 if (usercount(Ptr) >= Ptr->limit)
 308                                                 {
 309                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 310                                                         return NULL;
 311                                                 }
 312                                         }
 313                                 }
 314                                 if (Ptr->bans.size())
 315                                 {
 316                                         log(DEBUG,"add_channel: about to walk banlist");
 317                                         MOD_RESULT = 0;
 318                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 319                                         if (!MOD_RESULT)
 320                                         {
 321                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 322                                                 {
 323                                                         if (match(user->GetFullHost(),i->data))
 324                                                         {
 325                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 326                                                                 return NULL;
 327                                                         }
 328                                                 }
 329                                         }
 330                                 }
 331                         }
 332                 }
 333                 else
 334                 {
 335                         log(DEBUG,"Overridden checks");
 336                 }
 337                 created = 1;
 338         }
 339
 340         log(DEBUG,"Passed channel checks");
 341
 342         for (unsigned int index =0; index < user->chans.size(); index++)
 343         {
 344                 if (user->chans[index].channel == NULL)
 345                 {
 346                         return ForceChan(Ptr,user->chans[index],user,created);
 347                 }
 348         }
 349         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 350          * and put the channel in here. Same for remote users which are not bound by
 351          * the channel limits. Otherwise, nope, youre boned.
 352          */
 353         if (user->fd < 0)
 354         {
 355                 ucrec a;
 356                 chanrec* c = ForceChan(Ptr,a,user,created);
 357                 user->chans.push_back(a);
 358                 return c;
 359         }
 360         else if (strchr(user->modes,'o'))
 361         {
 362                 /* Oper allows extension up to the OPERMAXCHANS value */
 363                 if (user->chans.size() < OPERMAXCHANS)
 364                 {
 365                         ucrec a;
 366                         chanrec* c = ForceChan(Ptr,a,user,created);
 367                         user->chans.push_back(a);
 368                         return c;
 369                 }
 370         }
 371         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 372         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 373         return NULL;
 374 }
 375
 376 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 377 {
 378         if (created == 2)
 379         {
 380                 /* first user in is given ops */
 381                 a.uc_modes = UCMODE_OP;
 382         }
 383         else
 384         {
 385                 a.uc_modes = 0;
 386         }
 387         a.channel = Ptr;
 388         Ptr->AddUser((char*)user);
 389         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 390         log(DEBUG,"Sent JOIN to client");
 391         if (Ptr->topicset)
 392         {
 393                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 394                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 395         }
 396         userlist(user,Ptr);
 397         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 398         FOREACH_MOD OnUserJoin(user,Ptr);
 399         return Ptr;
 400 }
 401
 402 /* remove a channel from a users record, and remove the record from memory
 403  * if the channel has become empty */
 404
 405 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 406 {
 407         if ((!user) || (!cname))
 408         {
 409                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 410                 return NULL;
 411         }
 412
 413         chanrec* Ptr = FindChan(cname);
 414
 415         if (!Ptr)
 416                 return NULL;
 417
 418         FOREACH_MOD OnUserPart(user,Ptr);
 419         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 420
 421         for (unsigned int i =0; i < user->chans.size(); i++)
 422         {
 423                 /* zap it from the channel list of the user */
 424                 if (user->chans[i].channel == Ptr)
 425                 {
 426                         if (reason)
 427                         {
 428                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 429                         }
 430                         else
 431                         {
 432                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 433                         }
 434                         user->chans[i].uc_modes = 0;
 435                         user->chans[i].channel = NULL;
 436                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 437                         break;
 438                 }
 439         }
 440
 441         Ptr->DelUser((char*)user);
 442
 443         /* if there are no users left on the channel */
 444         if (!usercount(Ptr))
 445         {
 446                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 447
 448                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 449
 450                 /* kill the record */
 451                 if (iter != chanlist.end())
 452                 {
 453                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 454                         delete Ptr;
 455                         chanlist.erase(iter);
 456                 }
 457         }
 458
 459         return NULL;
 460 }
 461
 462
 463 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 464 {
 465         if ((!src) || (!user) || (!Ptr) || (!reason))
 466         {
 467                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 468                 return;
 469         }
 470
 471         if ((!Ptr) || (!user) || (!src))
 472         {
 473                 return;
 474         }
 475
 476         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 477
 478         if (!has_channel(user,Ptr))
 479         {
 480                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 481                 return;
 482         }
 483
 484         int MOD_RESULT = 0;
 485         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 486         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 487                 return;
 488
 489         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 490         {
 491                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 492                 {
 493                         if (cstatus(src,Ptr) == STATUS_HOP)
 494                         {
 495                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 496                         }
 497                         else
 498                         {
 499                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 500                         }
 501
 502                         return;
 503                 }
 504         }
 505
 506         if (!is_uline(src->server))
 507         {
 508                 MOD_RESULT = 0;
 509                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 510                 if (MOD_RESULT)
 511                         return;
 512         }
 513
 514         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 515
 516         for (unsigned int i =0; i < user->chans.size(); i++)
 517         {
 518                 /* zap it from the channel list of the user */
 519                 if (user->chans[i].channel)
 520                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 521                 {
 522                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 523                         user->chans[i].uc_modes = 0;
 524                         user->chans[i].channel = NULL;
 525                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 526                         break;
 527                 }
 528         }
 529
 530         Ptr->DelUser((char*)user);
 531
 532         /* if there are no users left on the channel */
 533         if (!usercount(Ptr))
 534         {
 535                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 536
 537                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 538
 539                 /* kill the record */
 540                 if (iter != chanlist.end())
 541                 {
 542                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 543                         delete Ptr;
 544                         chanlist.erase(iter);
 545                 }
 546         }
 547 }
 548
 549