src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 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 "wildcard.h"
  44 #include "message.h"
  45 #include "mode.h"
  46 #include "xline.h"
  47 #include "inspstring.h"
  48 #include "helperfuncs.h"
  49
  50 #ifdef GCC3
  51 #define nspace __gnu_cxx
  52 #else
  53 #define nspace std
  54 #endif
  55
  56 extern ServerConfig* Config;
  57
  58 extern int MODCOUNT;
  59 extern std::vector<Module*> modules;
  60 extern std::vector<ircd_module*> factory;
  61 extern int WHOWAS_STALE;
  62 extern int WHOWAS_MAX;
  63 extern time_t startup_time;
  64 extern std::vector<std::string> module_names;
  65 extern int boundPortCount;
  66 extern std::stringstream config_f;
  67 extern time_t TIME;
  68
  69 using namespace std;
  70
  71 std::vector<ModeParameter> custom_mode_params;
  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                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 280                                         if (!MOD_RESULT)
 281                                         {
 282                                                 log(DEBUG,"add_channel: channel is +i");
 283                                                 if (user->IsInvited(Ptr->name))
 284                                                 {
 285                                                         /* user was invited to channel */
 286                                                         /* there may be an optional channel NOTICE here */
 287                                                 }
 288                                                 else
 289                                                 {
 290                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 291                                                         return NULL;
 292                                                 }
 293                                         }
 294                                         user->RemoveInvite(Ptr->name);
 295                                 }
 296                                 if (Ptr->limit)
 297                                 {
 298                                         MOD_RESULT = 0;
 299                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 300                                         if (!MOD_RESULT)
 301                                         {
 302                                                 if (usercount(Ptr) >= Ptr->limit)
 303                                                 {
 304                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 305                                                         return NULL;
 306                                                 }
 307                                         }
 308                                 }
 309                                 if (Ptr->bans.size())
 310                                 {
 311                                         log(DEBUG,"add_channel: about to walk banlist");
 312                                         MOD_RESULT = 0;
 313                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 314                                         if (!MOD_RESULT)
 315                                         {
 316                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 317                                                 {
 318                                                         if (match(user->GetFullHost(),i->data))
 319                                                         {
 320                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 321                                                                 return NULL;
 322                                                         }
 323                                                 }
 324                                         }
 325                                 }
 326                         }
 327                 }
 328                 else
 329                 {
 330                         log(DEBUG,"Overridden checks");
 331                 }
 332                 created = 1;
 333         }
 334
 335         log(DEBUG,"Passed channel checks");
 336
 337         for (unsigned int index =0; index < user->chans.size(); index++)
 338         {
 339                 if (user->chans[index].channel == NULL)
 340                 {
 341                         return ForceChan(Ptr,user->chans[index],user,created);
 342                 }
 343         }
 344         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 345          * and put the channel in here. Same for remote users which are not bound by
 346          * the channel limits. Otherwise, nope, youre boned.
 347          */
 348         if (user->fd < 0)
 349         {
 350                 ucrec a;
 351                 chanrec* c = ForceChan(Ptr,a,user,created);
 352                 user->chans.push_back(a);
 353                 return c;
 354         }
 355         else if (strchr(user->modes,'o'))
 356         {
 357                 /* Oper allows extension up to the OPERMAXCHANS value */
 358                 if (user->chans.size() < OPERMAXCHANS)
 359                 {
 360                         ucrec a;
 361                         chanrec* c = ForceChan(Ptr,a,user,created);
 362                         user->chans.push_back(a);
 363                         return c;
 364                 }
 365         }
 366         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 367         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 368         return NULL;
 369 }
 370
 371 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 372 {
 373         if (created == 2)
 374         {
 375                 /* first user in is given ops */
 376                 a.uc_modes = UCMODE_OP;
 377         }
 378         else
 379         {
 380                 a.uc_modes = 0;
 381         }
 382         a.channel = Ptr;
 383         Ptr->AddUser((char*)user);
 384         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 385         log(DEBUG,"Sent JOIN to client");
 386         if (Ptr->topicset)
 387         {
 388                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 389                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 390         }
 391         userlist(user,Ptr);
 392         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 393         FOREACH_MOD OnUserJoin(user,Ptr);
 394         return Ptr;
 395 }
 396
 397 /* remove a channel from a users record, and remove the record from memory
 398  * if the channel has become empty */
 399
 400 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 401 {
 402         if ((!user) || (!cname))
 403         {
 404                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 405                 return NULL;
 406         }
 407
 408         chanrec* Ptr = FindChan(cname);
 409
 410         if (!Ptr)
 411                 return NULL;
 412
 413         FOREACH_MOD OnUserPart(user,Ptr);
 414         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 415
 416         for (unsigned int i =0; i < user->chans.size(); i++)
 417         {
 418                 /* zap it from the channel list of the user */
 419                 if (user->chans[i].channel == Ptr)
 420                 {
 421                         if (reason)
 422                         {
 423                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 424                         }
 425                         else
 426                         {
 427                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 428                         }
 429                         user->chans[i].uc_modes = 0;
 430                         user->chans[i].channel = NULL;
 431                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 432                         break;
 433                 }
 434         }
 435
 436         Ptr->DelUser((char*)user);
 437
 438         /* if there are no users left on the channel */
 439         if (!usercount(Ptr))
 440         {
 441                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 442
 443                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 444
 445                 /* kill the record */
 446                 if (iter != chanlist.end())
 447                 {
 448                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 449                         delete Ptr;
 450                         chanlist.erase(iter);
 451                 }
 452         }
 453
 454         return NULL;
 455 }
 456
 457
 458 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 459 {
 460         if ((!src) || (!user) || (!Ptr) || (!reason))
 461         {
 462                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 463                 return;
 464         }
 465
 466         if ((!Ptr) || (!user) || (!src))
 467         {
 468                 return;
 469         }
 470
 471         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 472
 473         if (!has_channel(user,Ptr))
 474         {
 475                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 476                 return;
 477         }
 478
 479         int MOD_RESULT = 0;
 480         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 481         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 482                 return;
 483
 484         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 485         {
 486                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 487                 {
 488                         if (cstatus(src,Ptr) == STATUS_HOP)
 489                         {
 490                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 491                         }
 492                         else
 493                         {
 494                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 495                         }
 496
 497                         return;
 498                 }
 499         }
 500
 501         if (!is_uline(src->server))
 502         {
 503                 MOD_RESULT = 0;
 504                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 505                 if (MOD_RESULT)
 506                         return;
 507         }
 508
 509         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 510
 511         for (unsigned int i =0; i < user->chans.size(); i++)
 512         {
 513                 /* zap it from the channel list of the user */
 514                 if (user->chans[i].channel)
 515                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 516                 {
 517                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 518                         user->chans[i].uc_modes = 0;
 519                         user->chans[i].channel = NULL;
 520                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 521                         break;
 522                 }
 523         }
 524
 525         Ptr->DelUser((char*)user);
 526
 527         /* if there are no users left on the channel */
 528         if (!usercount(Ptr))
 529         {
 530                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 531
 532                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 533
 534                 /* kill the record */
 535                 if (iter != chanlist.end())
 536                 {
 537                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 538                         delete Ptr;
 539                         chanlist.erase(iter);
 540                 }
 541         }
 542 }
 543
 544