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 1.28 2005/03/02 16:35:11 alex Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "defines.h"
  26 #include "conn.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "lists.h"
  30 #include "log.h"
  31 #include "match.h"
  32 #include "messages.h"
  33 #include "parse.h"
  34 #include "irc-info.h"
  35 #include "irc-write.h"
  36 #include "resolve.h"
  37 #include "conf.h"
  38
  39 #include "exp.h"
  40 #include "irc-channel.h"
  41
  42
  43 GLOBAL BOOLEAN
  44 IRC_JOIN( CLIENT *Client, REQUEST *Req )
  45 {
  46         CHAR *channame, *key, *flags, *topic, modes[8];
  47         BOOLEAN is_new_chan, is_invited, is_banned;
  48         CLIENT *target;
  49         CHANNEL *chan;
  50
  51         assert( Client != NULL );
  52         assert( Req != NULL );
  53
  54         /* Bad number of arguments? */
  55         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  56
  57         /* Who is the sender? */
  58         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
  59         else target = Client;
  60         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  61
  62         /* Are channel keys given? */
  63         if( Req->argc > 1 ) key = Req->argv[1];
  64         else key = NULL;
  65
  66         /* Channel-Namen durchgehen */
  67         chan = NULL;
  68         channame = strtok( Req->argv[0], "," );
  69         while( channame )
  70         {
  71                 chan = NULL; flags = NULL;
  72
  73                 /* wird der Channel neu angelegt? */
  74                 if( Channel_Search( channame )) is_new_chan = FALSE;
  75                 else is_new_chan = TRUE;
  76
  77                 /* Hat ein Server Channel-User-Modes uebergeben? */
  78                 if( Client_Type( Client ) == CLIENT_SERVER )
  79                 {
  80                         /* Channel-Flags extrahieren */
  81                         flags = strchr( channame, 0x7 );
  82                         if( flags )
  83                         {
  84                                 *flags = '\0';
  85                                 flags++;
  86                         }
  87                 }
  88
  89                 /* Local client? */
  90                 if( Client_Type( Client ) == CLIENT_USER )
  91                 {
  92                         /* Test if the user has reached his maximum channel count */
  93                         if( Client_Type( Client ) == CLIENT_USER )
  94                         {
  95                                 if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
  96                                 {
  97                                         IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG, Client_ID( Client ), channame );
  98                                         return CONNECTED;
  99                                 }
 100                         }
 101
 102                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 103                         if( is_new_chan )
 104                         {
 105                                 /* Erster User im Channel: Operator-Flag setzen */
 106                                 flags = "o";
 107                         }
 108                         else
 109                         {
 110                                 /* Existierenden Channel suchen */
 111                                 chan = Channel_Search( channame );
 112                                 assert( chan != NULL );
 113
 114                                 is_banned = Lists_CheckBanned( target, chan );
 115                                 is_invited = Lists_CheckInvited( target, chan );
 116
 117                                 /* Testen, ob Client gebanned ist */
 118                                 if(( is_banned == TRUE ) &&  ( is_invited == FALSE ))
 119                                 {
 120                                         /* Client ist gebanned (und nicht invited): */
 121                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 122
 123                                         /* Try next name, if any */
 124                                         channame = strtok( NULL, "," );
 125                                         continue;
 126                                 }
 127
 128                                 /* Ist der Channel "invite-only"? */
 129                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == FALSE ))
 130                                 {
 131                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 132                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 133
 134                                         /* Try next name, if any */
 135                                         channame = strtok( NULL, "," );
 136                                         continue;
 137                                 }
 138
 139                                 /* Is the channel protected by a key? */
 140                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 141                                 {
 142                                         /* Bad channel key! */
 143                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 144
 145                                         /* Try next name, if any */
 146                                         channame = strtok( NULL, "," );
 147                                         continue;
 148                                 }
 149
 150                                 /* Are there already too many members? */
 151                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 152                                 {
 153                                         /* Bad channel key! */
 154                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 155
 156                                         /* Try next name, if any */
 157                                         channame = strtok( NULL, "," );
 158                                         continue;
 159                                 }
 160                         }
 161                 }
 162                 else
 163                 {
 164                         /* Remote server: we don't need to know whether the
 165                          * client is invited or not, but we have to make sure
 166                          * that the "one shot" entries (generated by INVITE
 167                          * commands) in this list become deleted when a user
 168                          * joins a channel this way. */
 169                         chan = Channel_Search( channame );
 170                         if( chan != NULL ) (VOID)Lists_CheckInvited( target, chan );
 171                 }
 172
 173                 /* Channel joinen (und ggf. anlegen) */
 174                 if( ! Channel_Join( target, channame ))
 175                 {
 176                         /* naechsten Namen ermitteln */
 177                         channame = strtok( NULL, "," );
 178                         continue;
 179                 }
 180                 if( ! chan ) chan = Channel_Search( channame );
 181                 assert( chan != NULL );
 182
 183                 /* Modes setzen (wenn vorhanden) */
 184                 while( flags && *flags )
 185                 {
 186                         Channel_UserModeAdd( chan, target, *flags );
 187                         flags++;
 188                 }
 189
 190                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 191                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 192
 193                 /* Muessen Modes an andere Server gemeldet werden? */
 194                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 195                 if( modes[1] ) modes[0] = 0x7;
 196                 else modes[0] = '\0';
 197
 198                 /* An andere Server weiterleiten */
 199                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 200
 201                 /* im Channel bekannt machen */
 202                 IRC_WriteStrChannelPrefix( Client, chan, target, FALSE, "JOIN :%s", channame );
 203                 if( modes[1] )
 204                 {
 205                         /* Modes im Channel bekannt machen */
 206                         IRC_WriteStrChannelPrefix( Client, chan, target, FALSE, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 207                 }
 208
 209                 if( Client_Type( Client ) == CLIENT_USER )
 210                 {
 211                         /* an Client bestaetigen */
 212                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 213
 214                         /* Topic an Client schicken */
 215                         topic = Channel_Topic( chan );
 216                         if( *topic ) IRC_WriteStrClient( Client, RPL_TOPIC_MSG, Client_ID( Client ), channame, topic );
 217
 218                         /* Mitglieder an Client Melden */
 219                         IRC_Send_NAMES( Client, chan );
 220                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 221                 }
 222
 223                 /* naechsten Namen ermitteln */
 224                 channame = strtok( NULL, "," );
 225         }
 226         return CONNECTED;
 227 } /* IRC_JOIN */
 228
 229
 230 GLOBAL BOOLEAN
 231 IRC_PART( CLIENT *Client, REQUEST *Req )
 232 {
 233         CLIENT *target;
 234         CHAR *chan;
 235
 236         assert( Client != NULL );
 237         assert( Req != NULL );
 238
 239         /* Falsche Anzahl Parameter? */
 240         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 241
 242         /* Wer ist der Absender? */
 243         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 244         else target = Client;
 245         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 246
 247         /* Channel-Namen durchgehen */
 248         chan = strtok( Req->argv[0], "," );
 249         while( chan )
 250         {
 251                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 252                 {
 253                         /* naechsten Namen ermitteln */
 254                         chan = strtok( NULL, "," );
 255                         continue;
 256                 }
 257
 258                 /* naechsten Namen ermitteln */
 259                 chan = strtok( NULL, "," );
 260         }
 261         return CONNECTED;
 262 } /* IRC_PART */
 263
 264
 265 GLOBAL BOOLEAN
 266 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 267 {
 268         CHANNEL *chan;
 269         CLIENT *from;
 270         CHAR *topic;
 271
 272         assert( Client != NULL );
 273         assert( Req != NULL );
 274
 275         /* Falsche Anzahl Parameter? */
 276         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 277
 278         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 279         else from = Client;
 280         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 281
 282         /* Welcher Channel? */
 283         chan = Channel_Search( Req->argv[0] );
 284         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 285
 286         /* Ist der User Mitglied in dem Channel? */
 287         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 288
 289         if( Req->argc == 1 )
 290         {
 291                 /* Topic erfragen */
 292                 topic = Channel_Topic( chan );
 293                 if( *topic ) return IRC_WriteStrClient( from, RPL_TOPIC_MSG, Client_ID( from ), Channel_Name( chan ), topic );
 294                 else return IRC_WriteStrClient( from, RPL_NOTOPIC_MSG, Client_ID( from ), Channel_Name( chan ));
 295         }
 296
 297         if( strchr( Channel_Modes( chan ), 't' ))
 298         {
 299                 /* Topic Lock. Ist der User ein Channel Operator? */
 300                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 301         }
 302
 303         /* Topic setzen */
 304         Channel_SetTopic( chan, Req->argv[1] );
 305         Log( LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s", Client_Mask( from ), Channel_Name( chan ), Req->argv[1][0] ? Req->argv[1] : "<none>" );
 306
 307         /* im Channel bekannt machen und an Server weiterleiten */
 308         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 309         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 310
 311         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 312         else return CONNECTED;
 313 } /* IRC_TOPIC */
 314
 315
 316 GLOBAL BOOLEAN
 317 IRC_LIST( CLIENT *Client, REQUEST *Req )
 318 {
 319         CHAR *pattern;
 320         CHANNEL *chan;
 321         CLIENT *from, *target;
 322
 323         assert( Client != NULL );
 324         assert( Req != NULL );
 325
 326         /* Falsche Anzahl Parameter? */
 327         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 328
 329         if( Req->argc > 0 ) pattern = strtok( Req->argv[0], "," );
 330         else pattern = "*";
 331
 332         /* From aus Prefix ermitteln */
 333         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 334         else from = Client;
 335         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
 336
 337         if( Req->argc == 2 )
 338         {
 339                 /* an anderen Server forwarden */
 340                 target = Client_Search( Req->argv[1] );
 341                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
 342
 343                 if( target != Client_ThisServer( ))
 344                 {
 345                         /* Ok, anderer Server ist das Ziel: forwarden */
 346                         return IRC_WriteStrClientPrefix( target, from, "LIST %s :%s", from, Req->argv[1] );
 347                 }
 348         }
 349
 350         while( pattern )
 351         {
 352                 /* Loop through all the channels */
 353                 chan = Channel_First( );
 354                 while( chan )
 355                 {
 356                         /* Check search pattern */
 357                         if( Match( pattern, Channel_Name( chan )))
 358                         {
 359                                 /* Gotcha! */
 360                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 361                                     Channel_IsMemberOf( chan, from ))
 362                                 {
 363                                         if( ! IRC_WriteStrClient( from, RPL_LIST_MSG, from, Channel_Name( chan ), Channel_MemberCount( chan ), Channel_Topic( chan ))) return DISCONNECTED;
 364                                 }
 365                         }
 366                         chan = Channel_Next( chan );
 367                 }
 368
 369                 /* naechsten Namen ermitteln */
 370                 if( Req->argc > 0 ) pattern = strtok( NULL, "," );
 371                 else pattern = NULL;
 372         }
 373
 374         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, from );
 375 } /* IRC_LIST */
 376
 377
 378 GLOBAL BOOLEAN
 379 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 380 {
 381         CHAR modes_add[COMMAND_LEN], l[16], *ptr;
 382         CLIENT *from;
 383         CHANNEL *chan;
 384         INT arg_topic;
 385
 386         assert( Client != NULL );
 387         assert( Req != NULL );
 388
 389         /* Bad number of parameters? */
 390         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 391
 392         /* Compatibility kludge */
 393         if( Req->argc == 5 ) arg_topic = 4;
 394         else if( Req->argc == 3 ) arg_topic = 2;
 395         else arg_topic = -1;
 396
 397         /* Search origin */
 398         from = Client_Search( Req->prefix );
 399         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 400
 401         /* Search or create channel */
 402         chan = Channel_Search( Req->argv[0] );
 403         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 404         if( ! chan ) return CONNECTED;
 405
 406         if( Req->argv[1][0] == '+' )
 407         {
 408                 ptr = Channel_Modes( chan );
 409                 if( ! *ptr )
 410                 {
 411                         /* OK, this channel doesn't have modes jet, set the received ones: */
 412                         Channel_SetModes( chan, &Req->argv[1][1] );
 413
 414                         if( Req->argc == 5 )
 415                         {
 416                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 417                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 418                         }
 419                         else
 420                         {
 421                                 /* Delete modes which we never want to inherit */
 422                                 Channel_ModeDel( chan, 'l' );
 423                                 Channel_ModeDel( chan, 'k' );
 424                         }
 425
 426                         strcpy( modes_add, "" );
 427                         ptr = Channel_Modes( chan );
 428                         while( *ptr )
 429                         {
 430                                 if( *ptr == 'l' )
 431                                 {
 432                                         snprintf( l, sizeof( l ), " %ld", Channel_MaxUsers( chan ));
 433                                         strlcat( modes_add, l, sizeof( modes_add ));
 434                                 }
 435                                 if( *ptr == 'k' )
 436                                 {
 437                                         strlcat( modes_add, " ", sizeof( modes_add ));
 438                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 439                                 }
 440                                 ptr++;
 441                         }
 442
 443                         /* Inform members of this channel */
 444                         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 445                 }
 446         }
 447         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 448
 449         if( arg_topic > 0 )
 450         {
 451                 /* We got a topic */
 452                 ptr = Channel_Topic( chan );
 453                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 454                 {
 455                         /* OK, there is no topic jet */
 456                         Channel_SetTopic( chan, Req->argv[arg_topic] );
 457                         IRC_WriteStrChannelPrefix( Client, chan, from, FALSE, "TOPIC %s :%s", Req->argv[0], Channel_Topic( chan ));
 458                 }
 459         }
 460
 461         /* Forward CHANINFO to other serevrs */
 462         if( Req->argc == 5 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2], Req->argv[3], Req->argv[4] );
 463         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 464         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 465
 466         return CONNECTED;
 467 } /* IRC_CHANINFO */
 468
 469
 470 /* -eof- */