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