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