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channels.cpp

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00001 /*       +------------------------------------+
00002  *       | Inspire Internet Relay Chat Daemon |
00003  *       +------------------------------------+
00004  *
00005  *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
00006  *                       E-mail:
00007  *                <brain@chatspike.net>
00008  *                <Craig@chatspike.net>
00009  *     
00010  * Written by Craig Edwards, Craig McLure, and others.
00011  * This program is free but copyrighted software; see
00012  *            the file COPYING for details.
00013  *
00014  * ---------------------------------------------------
00015  */
00016 
00017 using namespace std;
00018 
00019 #include "inspircd_config.h"
00020 #include "inspircd.h"
00021 #include "inspircd_io.h"
00022 #include <unistd.h>
00023 #include <sys/errno.h>
00024 #include <sys/ioctl.h>
00025 #include <sys/utsname.h>
00026 #include <time.h>
00027 #include <string>
00028 #ifdef GCC3
00029 #include <ext/hash_map>
00030 #else
00031 #include <hash_map>
00032 #endif
00033 #include <map>
00034 #include <sstream>
00035 #include <vector>
00036 #include <deque>
00037 #include "users.h"
00038 #include "ctables.h"
00039 #include "globals.h"
00040 #include "modules.h"
00041 #include "dynamic.h"
00042 #include "commands.h"
00043 #include "wildcard.h"
00044 #include "message.h"
00045 #include "mode.h"
00046 #include "xline.h"
00047 #include "inspstring.h"
00048 #include "helperfuncs.h"
00049 #include "typedefs.h"
00050 
00051 #ifdef GCC3
00052 #define nspace __gnu_cxx
00053 #else
00054 #define nspace std
00055 #endif
00056 
00057 extern ServerConfig* Config;
00058 
00059 extern int MODCOUNT;
00060 extern std::vector<Module*> modules;
00061 extern std::vector<ircd_module*> factory;
00062 extern int WHOWAS_STALE;
00063 extern int WHOWAS_MAX;
00064 extern time_t TIME;
00065 extern chan_hash chanlist;
00066 
00067 using namespace std;
00068 
00069 std::vector<ModeParameter> custom_mode_params;
00070 
00071 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created);
00072 
00073 chanrec::chanrec()
00074 {
00075         strcpy(name,"");
00076         strcpy(custom_modes,"");
00077         strcpy(topic,"");
00078         strcpy(setby,"");
00079         strcpy(key,"");
00080         created = topicset = limit = 0;
00081         binarymodes = 0;
00082         internal_userlist.clear();
00083 }
00084 
00085 void chanrec::SetCustomMode(char mode,bool mode_on)
00086 {
00087         if (mode_on) {
00088                 static char m[3];
00089                 m[0] = mode;
00090                 m[1] = '\0';
00091                 if (!strchr(this->custom_modes,mode))
00092                 {
00093                         strlcat(custom_modes,m,MAXMODES);
00094                 }
00095                 log(DEBUG,"Custom mode %c set",mode);
00096         }
00097         else {
00098 
00099                 std::string a = this->custom_modes;
00100                 int pos = a.find(mode);
00101                 a.erase(pos,1);
00102                 strncpy(this->custom_modes,a.c_str(),MAXMODES);
00103 
00104                 log(DEBUG,"Custom mode %c removed: modelist='%s'",mode,this->custom_modes);
00105                 this->SetCustomModeParam(mode,"",false);
00106         }
00107 }
00108 
00109 
00110 void chanrec::SetCustomModeParam(char mode,char* parameter,bool mode_on)
00111 {
00112 
00113         log(DEBUG,"SetCustomModeParam called");
00114         ModeParameter M;
00115         M.mode = mode;
00116         strlcpy(M.channel,this->name,CHANMAX);
00117         strlcpy(M.parameter,parameter,MAXBUF);
00118         if (mode_on)
00119         {
00120                 log(DEBUG,"Custom mode parameter %c %s added",mode,parameter);
00121                 custom_mode_params.push_back(M);
00122         }
00123         else
00124         {
00125                 if (custom_mode_params.size())
00126                 {
00127                         for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
00128                         {
00129                                 if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
00130                                 {
00131                                         log(DEBUG,"Custom mode parameter %c %s removed",mode,parameter);
00132                                         custom_mode_params.erase(i);
00133                                         return;
00134                                 }
00135                         }
00136                 }
00137                 log(DEBUG,"*** BUG *** Attempt to remove non-existent mode parameter!");
00138         }
00139 }
00140 
00141 bool chanrec::IsCustomModeSet(char mode)
00142 {
00143         return (strchr(this->custom_modes,mode));
00144 }
00145 
00146 std::string chanrec::GetModeParameter(char mode)
00147 {
00148         if (custom_mode_params.size())
00149         {
00150                 for (vector<ModeParameter>::iterator i = custom_mode_params.begin(); i < custom_mode_params.end(); i++)
00151                 {
00152                         if ((i->mode == mode) && (!strcasecmp(this->name,i->channel)))
00153                         {
00154                                 return i->parameter;
00155                         }
00156                 }
00157         }
00158         return "";
00159 }
00160 
00161 long chanrec::GetUserCounter()
00162 {
00163         return (this->internal_userlist.size());
00164 }
00165 
00166 void chanrec::AddUser(char* castuser)
00167 {
00168         internal_userlist.push_back(castuser);
00169         log(DEBUG,"Added casted user to channel's internal list");
00170 }
00171 
00172 void chanrec::DelUser(char* castuser)
00173 {
00174         for (std::vector<char*>::iterator a = internal_userlist.begin(); a < internal_userlist.end(); a++)
00175         {
00176                 if (*a == castuser)
00177                 {
00178                         log(DEBUG,"Removed casted user from channel's internal list");
00179                         internal_userlist.erase(a);
00180                         return;
00181                 }
00182         }
00183         log(DEBUG,"BUG BUG BUG! Attempt to remove an uncasted user from the internal list of %s!",name);
00184 }
00185 
00186 std::vector<char*> *chanrec::GetUsers()
00187 {
00188         return &internal_userlist;
00189 }
00190 
00191 /* add a channel to a user, creating the record for it if needed and linking
00192  * it to the user record */
00193 
00194 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
00195 {
00196         if ((!user) || (!cn))
00197         {
00198                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
00199                 return 0;
00200         }
00201 
00202         int created = 0;
00203         char cname[MAXBUF];
00204         int MOD_RESULT = 0;
00205         strncpy(cname,cn,CHANMAX);
00206 
00207         log(DEBUG,"add_channel: %s %s",user->nick,cname);
00208 
00209         chanrec* Ptr = FindChan(cname);
00210 
00211         if (!Ptr)
00212         {
00213                 if (user->fd > -1)
00214                 {
00215                         MOD_RESULT = 0;
00216                         FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
00217                         if (MOD_RESULT == 1)
00218                                 return NULL;
00219                 }
00220                 /* create a new one */
00221                 chanlist[cname] = new chanrec();
00222                 strlcpy(chanlist[cname]->name, cname,CHANMAX);
00223                 chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
00224                 chanlist[cname]->created = TIME;
00225                 strcpy(chanlist[cname]->topic, "");
00226                 strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
00227                 chanlist[cname]->topicset = 0;
00228                 Ptr = chanlist[cname];
00229                 log(DEBUG,"add_channel: created: %s",cname);
00230                 /* set created to 2 to indicate user
00231                  * is the first in the channel
00232                  * and should be given ops */
00233                 created = 2;
00234         }
00235         else
00236         {
00237                 /* Already on the channel */
00238                 if (has_channel(user,Ptr))
00239                         return NULL;
00240 
00241                 // remote users are allowed us to bypass channel modes
00242                 // and bans (used by servers)
00243                 if (user->fd > -1)
00244                 {
00245                         MOD_RESULT = 0;
00246                         FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
00247                         if (MOD_RESULT == 1)
00248                         {
00249                                 return NULL;
00250                         }
00251                         else
00252                         {
00253                                 if (*Ptr->key)
00254                                 {
00255                                         MOD_RESULT = 0;
00256                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
00257                                         if (!MOD_RESULT)
00258                                         {
00259                                                 if (!key)
00260                                                 {
00261                                                         log(DEBUG,"add_channel: no key given in JOIN");
00262                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
00263                                                         return NULL;
00264                                                 }
00265                                                 else
00266                                                 {
00267                                                         if (strcasecmp(key,Ptr->key))
00268                                                         {
00269                                                                 log(DEBUG,"add_channel: bad key given in JOIN");
00270                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
00271                                                                 return NULL;
00272                                                         }
00273                                                 }
00274                                         }
00275                                 }
00276                                 if (Ptr->binarymodes & CM_INVITEONLY)
00277                                 {
00278                                         MOD_RESULT = 0;
00279                                         irc::string xname(Ptr->name);
00280                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
00281                                         if (!MOD_RESULT)
00282                                         {
00283                                                 log(DEBUG,"add_channel: channel is +i");
00284                                                 if (user->IsInvited(xname))
00285                                                 {
00286                                                         /* user was invited to channel */
00287                                                         /* there may be an optional channel NOTICE here */
00288                                                 }
00289                                                 else
00290                                                 {
00291                                                         WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
00292                                                         return NULL;
00293                                                 }
00294                                         }
00295                                         user->RemoveInvite(xname);
00296                                 }
00297                                 if (Ptr->limit)
00298                                 {
00299                                         MOD_RESULT = 0;
00300                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
00301                                         if (!MOD_RESULT)
00302                                         {
00303                                                 if (usercount(Ptr) >= Ptr->limit)
00304                                                 {
00305                                                         WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
00306                                                         return NULL;
00307                                                 }
00308                                         }
00309                                 }
00310                                 if (Ptr->bans.size())
00311                                 {
00312                                         log(DEBUG,"add_channel: about to walk banlist");
00313                                         MOD_RESULT = 0;
00314                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
00315                                         if (!MOD_RESULT)
00316                                         {
00317                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
00318                                                 {
00319                                                         if (match(user->GetFullHost(),i->data))
00320                                                         {
00321                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
00322                                                                 return NULL;
00323                                                         }
00324                                                 }
00325                                         }
00326                                 }
00327                         }
00328                 }
00329                 else
00330                 {
00331                         log(DEBUG,"Overridden checks");
00332                 }
00333                 created = 1;
00334         }
00335 
00336         log(DEBUG,"Passed channel checks");
00337 
00338         for (unsigned int index =0; index < user->chans.size(); index++)
00339         {
00340                 if (user->chans[index].channel == NULL)
00341                 {
00342                         return ForceChan(Ptr,user->chans[index],user,created);
00343                 }
00344         }
00345         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
00346          * and put the channel in here. Same for remote users which are not bound by
00347          * the channel limits. Otherwise, nope, youre boned.
00348          */
00349         if (user->fd < 0)
00350         {
00351                 ucrec a;
00352                 chanrec* c = ForceChan(Ptr,a,user,created);
00353                 user->chans.push_back(a);
00354                 return c;
00355         }
00356         else if (strchr(user->modes,'o'))
00357         {
00358                 /* Oper allows extension up to the OPERMAXCHANS value */
00359                 if (user->chans.size() < OPERMAXCHANS)
00360                 {
00361                         ucrec a;
00362                         chanrec* c = ForceChan(Ptr,a,user,created);
00363                         user->chans.push_back(a);
00364                         return c;
00365                 }
00366         }
00367         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
00368         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
00369         return NULL;
00370 }
00371 
00372 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
00373 {
00374         if (created == 2)
00375         {
00376                 /* first user in is given ops */
00377                 a.uc_modes = UCMODE_OP;
00378         }
00379         else
00380         {
00381                 a.uc_modes = 0;
00382         }
00383         a.channel = Ptr;
00384         Ptr->AddUser((char*)user);
00385         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
00386         log(DEBUG,"Sent JOIN to client");
00387         if (Ptr->topicset)
00388         {
00389                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
00390                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
00391         }
00392         userlist(user,Ptr);
00393         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
00394         FOREACH_MOD OnUserJoin(user,Ptr);
00395         return Ptr;
00396 }
00397 
00398 /* remove a channel from a users record, and remove the record from memory
00399  * if the channel has become empty */
00400 
00401 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
00402 {
00403         if ((!user) || (!cname))
00404         {
00405                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
00406                 return NULL;
00407         }
00408 
00409         chanrec* Ptr = FindChan(cname);
00410 
00411         if (!Ptr)
00412                 return NULL;
00413 
00414         FOREACH_MOD OnUserPart(user,Ptr);
00415         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
00416 
00417         for (unsigned int i =0; i < user->chans.size(); i++)
00418         {
00419                 /* zap it from the channel list of the user */
00420                 if (user->chans[i].channel == Ptr)
00421                 {
00422                         if (reason)
00423                         {
00424                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
00425                         }
00426                         else
00427                         {
00428                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
00429                         }
00430                         user->chans[i].uc_modes = 0;
00431                         user->chans[i].channel = NULL;
00432                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
00433                         break;
00434                 }
00435         }
00436 
00437         Ptr->DelUser((char*)user);
00438 
00439         /* if there are no users left on the channel */
00440         if (!usercount(Ptr))
00441         {
00442                 chan_hash::iterator iter = chanlist.find(Ptr->name);
00443 
00444                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
00445 
00446                 /* kill the record */
00447                 if (iter != chanlist.end())
00448                 {
00449                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
00450                         delete Ptr;
00451                         chanlist.erase(iter);
00452                 }
00453         }
00454 
00455         return NULL;
00456 }
00457 
00458 
00459 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
00460 {
00461         if ((!src) || (!user) || (!Ptr) || (!reason))
00462         {
00463                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
00464                 return;
00465         }
00466 
00467         if ((!Ptr) || (!user) || (!src))
00468         {
00469                 return;
00470         }
00471 
00472         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
00473 
00474         if (!has_channel(user,Ptr))
00475         {
00476                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
00477                 return;
00478         }
00479 
00480         int MOD_RESULT = 0;
00481         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
00482         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
00483                 return;
00484 
00485         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
00486         {
00487                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
00488                 {
00489                         if (cstatus(src,Ptr) == STATUS_HOP)
00490                         {
00491                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
00492                         }
00493                         else
00494                         {
00495                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
00496                         }
00497 
00498                         return;
00499                 }
00500         }
00501 
00502         if (!is_uline(src->server))
00503         {
00504                 MOD_RESULT = 0;
00505                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
00506                 if (MOD_RESULT)
00507                         return;
00508         }
00509 
00510         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
00511 
00512         for (unsigned int i =0; i < user->chans.size(); i++)
00513         {
00514                 /* zap it from the channel list of the user */
00515                 if (user->chans[i].channel)
00516                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
00517                 {
00518                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
00519                         user->chans[i].uc_modes = 0;
00520                         user->chans[i].channel = NULL;
00521                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
00522                         break;
00523                 }
00524         }
00525 
00526         Ptr->DelUser((char*)user);
00527 
00528         /* if there are no users left on the channel */
00529         if (!usercount(Ptr))
00530         {
00531                 chan_hash::iterator iter = chanlist.find(Ptr->name);
00532 
00533                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
00534 
00535                 /* kill the record */
00536                 if (iter != chanlist.end())
00537                 {
00538                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
00539                         delete Ptr;
00540                         chanlist.erase(iter);
00541                 }
00542         }
00543 }
00544 
00545 

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