src/ngircd/irc-channel.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  *
  11  * IRC channel commands
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 static char UNUSED id[] = "$Id: irc-channel.c,v 1.22 2002/12/26 17:04:54 alex Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <string.h>
  22
  23 #include "defines.h"
  24 #include "conn.h"
  25 #include "client.h"
  26 #include "channel.h"
  27 #include "lists.h"
  28 #include "log.h"
  29 #include "match.h"
  30 #include "messages.h"
  31 #include "parse.h"
  32 #include "irc-info.h"
  33 #include "irc-write.h"
  34 #include "resolve.h"
  35 #include "conf.h"
  36
  37 #include "exp.h"
  38 #include "irc-channel.h"
  39
  40
  41 GLOBAL BOOLEAN
  42 IRC_JOIN( CLIENT *Client, REQUEST *Req )
  43 {
  44         CHAR *channame, *key, *flags, *topic, modes[8];
  45         BOOLEAN is_new_chan, is_invited, is_banned;
  46         CLIENT *target;
  47         CHANNEL *chan;
  48
  49         assert( Client != NULL );
  50         assert( Req != NULL );
  51
  52         /* Bad number of arguments? */
  53         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  54
  55         /* Who is the sender? */
  56         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
  57         else target = Client;
  58         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  59
  60         /* Are channel keys given? */
  61         if( Req->argc > 1 ) key = Req->argv[1];
  62         else key = NULL;
  63
  64         /* Channel-Namen durchgehen */
  65         chan = NULL;
  66         channame = strtok( Req->argv[0], "," );
  67         while( channame )
  68         {
  69                 chan = flags = NULL;
  70
  71                 /* wird der Channel neu angelegt? */
  72                 if( Channel_Search( channame )) is_new_chan = FALSE;
  73                 else is_new_chan = TRUE;
  74
  75                 /* Hat ein Server Channel-User-Modes uebergeben? */
  76                 if( Client_Type( Client ) == CLIENT_SERVER )
  77                 {
  78                         /* Channel-Flags extrahieren */
  79                         flags = strchr( channame, 0x7 );
  80                         if( flags )
  81                         {
  82                                 *flags = '\0';
  83                                 flags++;
  84                         }
  85                 }
  86
  87                 /* Lokaler Client? */
  88                 if( Client_Type( Client ) == CLIENT_USER )
  89                 {
  90                         /* Test if the user has reached his maximum channel count */
  91                         if( Client_Type( Client ) == CLIENT_USER )
  92                         {
  93                                 if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
  94                                 {
  95                                         IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG, Client_ID( Client ), channame );
  96                                         return CONNECTED;
  97                                 }
  98                         }
  99
 100                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 101                         if( is_new_chan )
 102                         {
 103                                 /* Erster User im Channel: Operator-Flag setzen */
 104                                 flags = "o";
 105                         }
 106                         else
 107                         {
 108                                 /* Existierenden Channel suchen */
 109                                 chan = Channel_Search( channame );
 110                                 assert( chan != NULL );
 111
 112                                 is_banned = Lists_CheckBanned( target, chan );
 113                                 is_invited = Lists_CheckInvited( target, chan );
 114
 115                                 /* Testen, ob Client gebanned ist */
 116                                 if(( is_banned == TRUE ) &&  ( is_invited == FALSE ))
 117                                 {
 118                                         /* Client ist gebanned (und nicht invited): */
 119                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 120
 121                                         /* Try next name, if any */
 122                                         channame = strtok( NULL, "," );
 123                                         continue;
 124                                 }
 125
 126                                 /* Ist der Channel "invite-only"? */
 127                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == FALSE ))
 128                                 {
 129                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 130                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 131
 132                                         /* Try next name, if any */
 133                                         channame = strtok( NULL, "," );
 134                                         continue;
 135                                 }
 136
 137                                 /* Is the channel protected by a key? */
 138                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 139                                 {
 140                                         /* Bad channel key! */
 141                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 142
 143                                         /* Try next name, if any */
 144                                         channame = strtok( NULL, "," );
 145                                         continue;
 146                                 }
 147
 148                                 /* Are there already too many members? */
 149                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 150                                 {
 151                                         /* Bad channel key! */
 152                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 153
 154                                         /* Try next name, if any */
 155                                         channame = strtok( NULL, "," );
 156                                         continue;
 157                                 }
 158                         }
 159                 }
 160
 161                 /* Channel joinen (und ggf. anlegen) */
 162                 if( ! Channel_Join( target, channame ))
 163                 {
 164                         /* naechsten Namen ermitteln */
 165                         channame = strtok( NULL, "," );
 166                         continue;
 167                 }
 168                 if( ! chan ) chan = Channel_Search( channame );
 169                 assert( chan != NULL );
 170
 171                 /* Modes setzen (wenn vorhanden) */
 172                 while( flags && *flags )
 173                 {
 174                         Channel_UserModeAdd( chan, target, *flags );
 175                         flags++;
 176                 }
 177
 178                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 179                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 180
 181                 /* Muessen Modes an andere Server gemeldet werden? */
 182                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 183                 if( modes[1] ) modes[0] = 0x7;
 184                 else modes[0] = '\0';
 185
 186                 /* An andere Server weiterleiten */
 187                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 188
 189                 /* im Channel bekannt machen */
 190                 IRC_WriteStrChannelPrefix( Client, chan, target, FALSE, "JOIN :%s", channame );
 191                 if( modes[1] )
 192                 {
 193                         /* Modes im Channel bekannt machen */
 194                         IRC_WriteStrChannelPrefix( Client, chan, target, FALSE, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 195                 }
 196
 197                 if( Client_Type( Client ) == CLIENT_USER )
 198                 {
 199                         /* an Client bestaetigen */
 200                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 201
 202                         /* Topic an Client schicken */
 203                         topic = Channel_Topic( chan );
 204                         if( *topic ) IRC_WriteStrClient( Client, RPL_TOPIC_MSG, Client_ID( Client ), channame, topic );
 205
 206                         /* Mitglieder an Client Melden */
 207                         IRC_Send_NAMES( Client, chan );
 208                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 209                 }
 210
 211                 /* naechsten Namen ermitteln */
 212                 channame = strtok( NULL, "," );
 213         }
 214         return CONNECTED;
 215 } /* IRC_JOIN */
 216
 217
 218 GLOBAL BOOLEAN
 219 IRC_PART( CLIENT *Client, REQUEST *Req )
 220 {
 221         CLIENT *target;
 222         CHAR *chan;
 223
 224         assert( Client != NULL );
 225         assert( Req != NULL );
 226
 227         /* Falsche Anzahl Parameter? */
 228         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 229
 230         /* Wer ist der Absender? */
 231         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 232         else target = Client;
 233         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 234
 235         /* Channel-Namen durchgehen */
 236         chan = strtok( Req->argv[0], "," );
 237         while( chan )
 238         {
 239                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 240                 {
 241                         /* naechsten Namen ermitteln */
 242                         chan = strtok( NULL, "," );
 243                         continue;
 244                 }
 245
 246                 /* naechsten Namen ermitteln */
 247                 chan = strtok( NULL, "," );
 248         }
 249         return CONNECTED;
 250 } /* IRC_PART */
 251
 252
 253 GLOBAL BOOLEAN
 254 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 255 {
 256         CHANNEL *chan;
 257         CLIENT *from;
 258         CHAR *topic;
 259
 260         assert( Client != NULL );
 261         assert( Req != NULL );
 262
 263         /* Falsche Anzahl Parameter? */
 264         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 265
 266         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 267         else from = Client;
 268         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 269
 270         /* Welcher Channel? */
 271         chan = Channel_Search( Req->argv[0] );
 272         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 273
 274         /* Ist der User Mitglied in dem Channel? */
 275         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 276
 277         if( Req->argc == 1 )
 278         {
 279                 /* Topic erfragen */
 280                 topic = Channel_Topic( chan );
 281                 if( *topic ) return IRC_WriteStrClient( from, RPL_TOPIC_MSG, Client_ID( from ), Channel_Name( chan ), topic );
 282                 else return IRC_WriteStrClient( from, RPL_NOTOPIC_MSG, Client_ID( from ), Channel_Name( chan ));
 283         }
 284
 285         if( strchr( Channel_Modes( chan ), 't' ))
 286         {
 287                 /* Topic Lock. Ist der User ein Channel Operator? */
 288                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 289         }
 290
 291         /* Topic setzen */
 292         Channel_SetTopic( chan, Req->argv[1] );
 293         Log( LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s", Client_Mask( from ), Channel_Name( chan ), Req->argv[1][0] ? Req->argv[1] : "<none>" );
 294
 295         /* im Channel bekannt machen und an Server weiterleiten */
 296         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 297         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 298
 299         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 300         else return CONNECTED;
 301 } /* IRC_TOPIC */
 302
 303
 304 GLOBAL BOOLEAN
 305 IRC_LIST( CLIENT *Client, REQUEST *Req )
 306 {
 307         CHAR *pattern;
 308         CHANNEL *chan;
 309         CLIENT *from, *target;
 310
 311         assert( Client != NULL );
 312         assert( Req != NULL );
 313
 314         /* Falsche Anzahl Parameter? */
 315         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 316
 317         if( Req->argc > 0 ) pattern = strtok( Req->argv[0], "," );
 318         else pattern = "*";
 319
 320         /* From aus Prefix ermitteln */
 321         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 322         else from = Client;
 323         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
 324
 325         if( Req->argc == 2 )
 326         {
 327                 /* an anderen Server forwarden */
 328                 target = Client_Search( Req->argv[1] );
 329                 if( ! target ) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
 330
 331                 if( target != Client_ThisServer( ))
 332                 {
 333                         /* Ok, anderer Server ist das Ziel: forwarden */
 334                         return IRC_WriteStrClientPrefix( target, from, "LIST %s :%s", from, Req->argv[1] );
 335                 }
 336         }
 337
 338         while( pattern )
 339         {
 340                 /* alle Channel durchgehen */
 341                 chan = Channel_First( );
 342                 while( chan )
 343                 {
 344                         /* Passt die Suchmaske auf diesen Channel? */
 345                         if( Match( pattern, Channel_Name( chan )))
 346                         {
 347                                 /* Treffer! */
 348                                 if( ! IRC_WriteStrClient( from, RPL_LIST_MSG, from, Channel_Name( chan ), Channel_MemberCount( chan ), Channel_Topic( chan ))) return DISCONNECTED;
 349                         }
 350                         chan = Channel_Next( chan );
 351                 }
 352
 353                 /* naechsten Namen ermitteln */
 354                 if( Req->argc > 0 ) pattern = strtok( NULL, "," );
 355                 else pattern = NULL;
 356         }
 357
 358         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, from );
 359 } /* IRC_LIST */
 360
 361
 362 GLOBAL BOOLEAN
 363 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 364 {
 365         CLIENT *from;
 366         CHANNEL *chan;
 367         CHAR *ptr;
 368
 369         assert( Client != NULL );
 370         assert( Req != NULL );
 371
 372         /* Falsche Anzahl Parameter? */
 373         if(( Req->argc < 1 ) || ( Req->argc > 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 374
 375         /* From-Server suchen */
 376         from = Client_Search( Req->prefix );
 377         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 378
 379         /* Channel suchen bzw. erzeugen */
 380         chan = Channel_Search( Req->argv[0] );
 381         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 382         if( ! chan ) return CONNECTED;
 383
 384         if( Req->argv[1][0] == '+' )
 385         {
 386                 ptr = Channel_Modes( chan );
 387                 if( ! *ptr )
 388                 {
 389                         /* OK, es sind noch keine Modes gesetzt */
 390                         Channel_SetModes( chan, &Req->argv[1][1] );
 391                         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "MODE %s +%s", Req->argv[0], &Req->argv[1][1] );
 392                 }
 393         }
 394         else Log( LOG_WARNING, "CHANNELINFO: invalid MODE format ignored!" );
 395
 396         if( Req->argc == 3 )
 397         {
 398                 /* Es wurde auch ein Topic mit uebermittelt */
 399                 ptr = Channel_Topic( chan );
 400                 if( ! *ptr )
 401                 {
 402                         /* OK, es ist bisher kein Topic gesetzt */
 403                         Channel_SetTopic( chan, Req->argv[2] );
 404                         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "TOPIC %s :%s", Req->argv[0], Req->argv[2] );
 405                 }
 406         }
 407
 408         /* an andere Server forwarden */
 409         IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 410         return CONNECTED;
 411 } /* IRC_CHANINFO */
 412
 413
 414 /* -eof- */