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 1.34 2006/03/16 19:56:34 fw 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 bool
  44 IRC_JOIN( CLIENT *Client, REQUEST *Req )
  45 {
  46         char *channame, *channame_ptr, *key, *key_ptr, *flags, *topic, modes[8];
  47         bool 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) {
  64                 key = Req->argv[1];
  65                 key_ptr = strchr(key, ',');
  66                 if (key_ptr) *key_ptr = '\0';
  67         }
  68         else
  69                 key = key_ptr = NULL;
  70
  71         channame = Req->argv[0];
  72         channame_ptr = strchr(channame, ',');
  73         if (channame_ptr) *channame_ptr = '\0';
  74
  75         /* Channel-Namen durchgehen */
  76         while (channame)
  77         {
  78                 chan = NULL; flags = NULL;
  79
  80                 /* wird der Channel neu angelegt? */
  81                 if( Channel_Search( channame )) is_new_chan = false;
  82                 else is_new_chan = true;
  83
  84                 /* Hat ein Server Channel-User-Modes uebergeben? */
  85                 if( Client_Type( Client ) == CLIENT_SERVER )
  86                 {
  87                         /* Channel-Flags extrahieren */
  88                         flags = strchr( channame, 0x7 );
  89                         if( flags )
  90                         {
  91                                 *flags = '\0';
  92                                 flags++;
  93                         }
  94                 }
  95
  96                 /* Local client? */
  97                 if( Client_Type( Client ) == CLIENT_USER )
  98                 {
  99                         /* Test if the user has reached his maximum channel count */
 100                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins )) {
 101                                 IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 102                                                         Client_ID( Client ), channame );
 103                                 return CONNECTED;
 104                         }
 105
 106                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 107                         if( is_new_chan )
 108                         {
 109                                 /* Erster User im Channel: Operator-Flag setzen */
 110                                 flags = "o";
 111                         }
 112                         else
 113                         {
 114                                 /* Existierenden Channel suchen */
 115                                 chan = Channel_Search( channame );
 116                                 assert( chan != NULL );
 117
 118                                 is_banned = Lists_CheckBanned( target, chan );
 119                                 is_invited = Lists_CheckInvited( target, chan );
 120
 121                                 /* Testen, ob Client gebanned ist */
 122                                 if(( is_banned == true) &&  ( is_invited == false ))
 123                                 {
 124                                         /* Client ist gebanned (und nicht invited): */
 125                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 126
 127                                         /* Try next name, if any */
 128                                         channame = strtok( NULL, "," );
 129                                         continue;
 130                                 }
 131
 132                                 /* Ist der Channel "invite-only"? */
 133                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 134                                 {
 135                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 136                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 137
 138                                         /* Try next name, if any */
 139                                         channame = strtok( NULL, "," );
 140                                         continue;
 141                                 }
 142
 143                                 /* Is the channel protected by a key? */
 144                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 145                                 {
 146                                         /* Bad channel key! */
 147                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 148
 149                                         /* Try next name, if any */
 150                                         channame = strtok( NULL, "," );
 151                                         continue;
 152                                 }
 153
 154                                 /* Are there already too many members? */
 155                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 156                                 {
 157                                         /* Bad channel key! */
 158                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 159
 160                                         /* Try next name, if any */
 161                                         channame = strtok( NULL, "," );
 162                                         continue;
 163                                 }
 164                         }
 165                 }
 166                 else
 167                 {
 168                         /* Remote server: we don't need to know whether the
 169                          * client is invited or not, but we have to make sure
 170                          * that the "one shot" entries (generated by INVITE
 171                          * commands) in this list become deleted when a user
 172                          * joins a channel this way. */
 173                         chan = Channel_Search( channame );
 174                         if( chan != NULL ) (void)Lists_CheckInvited( target, chan );
 175                 }
 176
 177                 /* Channel joinen (und ggf. anlegen) */
 178                 if( ! Channel_Join( target, channame ))
 179                 {
 180                         /* naechsten Namen ermitteln */
 181                         channame = strtok( NULL, "," );
 182                         continue;
 183                 }
 184                 if( ! chan ) chan = Channel_Search( channame );
 185                 assert( chan != NULL );
 186
 187                 /* Modes setzen (wenn vorhanden) */
 188                 while( flags && *flags )
 189                 {
 190                         Channel_UserModeAdd( chan, target, *flags );
 191                         flags++;
 192                 }
 193
 194                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 195                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 196
 197                 /* Muessen Modes an andere Server gemeldet werden? */
 198                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 199                 if( modes[1] ) modes[0] = 0x7;
 200                 else modes[0] = '\0';
 201
 202                 /* An andere Server weiterleiten */
 203                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 204
 205                 /* im Channel bekannt machen */
 206                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 207                 if( modes[1] )
 208                 {
 209                         /* Modes im Channel bekannt machen */
 210                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 211                 }
 212
 213                 if( Client_Type( Client ) == CLIENT_USER )
 214                 {
 215                         /* an Client bestaetigen */
 216                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 217
 218                         /* Send topic to client, if any */
 219                         topic = Channel_Topic(chan);
 220                         if (*topic) {
 221                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 222                                         Client_ID(Client), channame, topic);
 223 #ifndef STRICT_RFC
 224                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 225                                         Client_ID(Client), channame,
 226                                         Channel_TopicWho(chan),
 227                                         Channel_TopicTime(chan));
 228 #endif
 229                         }
 230
 231                         /* Mitglieder an Client Melden */
 232                         IRC_Send_NAMES( Client, chan );
 233                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 234                 }
 235
 236                 /* next channel? */
 237                 channame = channame_ptr;
 238                 if (channame) {
 239                         channame++;
 240                         channame_ptr = strchr(channame, ',');
 241                         if (channame_ptr) *channame_ptr = '\0';
 242
 243                         if (key_ptr) {
 244                                 key = ++key_ptr;
 245                                 key_ptr = strchr(key, ',');
 246                                 if (key_ptr) *key_ptr = '\0';
 247                         }
 248                 }
 249         }
 250         return CONNECTED;
 251 } /* IRC_JOIN */
 252
 253
 254 GLOBAL bool
 255 IRC_PART( CLIENT *Client, REQUEST *Req )
 256 {
 257         CLIENT *target;
 258         char *chan;
 259
 260         assert( Client != NULL );
 261         assert( Req != NULL );
 262
 263         /* Falsche Anzahl Parameter? */
 264         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 265
 266         /* Wer ist der Absender? */
 267         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 268         else target = Client;
 269         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 270
 271         /* Channel-Namen durchgehen */
 272         chan = strtok( Req->argv[0], "," );
 273         while( chan )
 274         {
 275                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 276                 {
 277                         /* naechsten Namen ermitteln */
 278                         chan = strtok( NULL, "," );
 279                         continue;
 280                 }
 281
 282                 /* naechsten Namen ermitteln */
 283                 chan = strtok( NULL, "," );
 284         }
 285         return CONNECTED;
 286 } /* IRC_PART */
 287
 288
 289 GLOBAL bool
 290 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 291 {
 292         CHANNEL *chan;
 293         CLIENT *from;
 294         char *topic;
 295         bool r;
 296
 297         assert( Client != NULL );
 298         assert( Req != NULL );
 299
 300         /* Falsche Anzahl Parameter? */
 301         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 302
 303         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 304         else from = Client;
 305         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 306
 307         /* Welcher Channel? */
 308         chan = Channel_Search( Req->argv[0] );
 309         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 310
 311         /* Ist der User Mitglied in dem Channel? */
 312         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 313
 314         if( Req->argc == 1 )
 315         {
 316                 /* Request actual topic */
 317                 topic = Channel_Topic(chan);
 318                 if (*topic) {
 319                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 320                                 Client_ID(Client), Channel_Name(chan), topic);
 321 #ifndef STRICT_RFC
 322                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 323                                 Client_ID(Client), Channel_Name(chan),
 324                                 Channel_TopicWho(chan),
 325                                 Channel_TopicTime(chan));
 326 #endif
 327                         return r;
 328                 }
 329                 else
 330                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 331                                         Client_ID(from), Channel_Name(chan));
 332         }
 333
 334         if( strchr( Channel_Modes( chan ), 't' ))
 335         {
 336                 /* Topic Lock. Ist der User ein Channel Operator? */
 337                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 338         }
 339
 340         /* Set new topic */
 341         Channel_SetTopic(chan, from, Req->argv[1]);
 342         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 343                 Client_Mask(from), Channel_Name(chan),
 344                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 345
 346         /* im Channel bekannt machen und an Server weiterleiten */
 347         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 348         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 349
 350         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 351         else return CONNECTED;
 352 } /* IRC_TOPIC */
 353
 354
 355 /**
 356  * Handler for the IRC "LIST" command.
 357  * This implementation handles the local case as well as the forwarding of the
 358  * LIST command to other servers in the IRC network.
 359  */
 360 GLOBAL bool
 361 IRC_LIST( CLIENT *Client, REQUEST *Req )
 362 {
 363         char *pattern;
 364         CHANNEL *chan;
 365         CLIENT *from, *target;
 366
 367         assert( Client != NULL );
 368         assert( Req != NULL );
 369
 370         /* Bad number of prameters? */
 371         if( Req->argc > 2 )
 372                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 373                         Client_ID( Client ), Req->command );
 374
 375         if( Req->argc > 0 )
 376                 pattern = strtok( Req->argv[0], "," );
 377         else
 378                 pattern = "*";
 379
 380         /* Get sender from prefix, if any */
 381         if( Client_Type( Client ) == CLIENT_SERVER )
 382                 from = Client_Search( Req->prefix );
 383         else
 384                 from = Client;
 385
 386         if( ! from )
 387                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 388                                 Client_ID( Client ), Req->prefix );
 389
 390         if( Req->argc == 2 )
 391         {
 392                 /* Forward to other server? */
 393                 target = Client_Search( Req->argv[1] );
 394                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 395                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 396                                         Client_ID( Client ), Req->argv[1] );
 397
 398                 if( target != Client_ThisServer( ))
 399                 {
 400                         /* Target is indeed an other server, forward it! */
 401                         return IRC_WriteStrClientPrefix( target, from,
 402                                         "LIST %s :%s", Client_ID( from ),
 403                                         Req->argv[1] );
 404                 }
 405         }
 406
 407         while( pattern )
 408         {
 409                 /* Loop through all the channels */
 410                 chan = Channel_First( );
 411                 while( chan )
 412                 {
 413                         /* Check search pattern */
 414                         if( Match( pattern, Channel_Name( chan )))
 415                         {
 416                                 /* Gotcha! */
 417                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 418                                     Channel_IsMemberOf( chan, from ))
 419                                 {
 420                                         if( ! IRC_WriteStrClient( from,
 421                                             RPL_LIST_MSG, Client_ID( from ),
 422                                             Channel_Name( chan ),
 423                                             Channel_MemberCount( chan ),
 424                                             Channel_Topic( chan )))
 425                                                 return DISCONNECTED;
 426                                 }
 427                         }
 428                         chan = Channel_Next( chan );
 429                 }
 430
 431                 /* Get next name ... */
 432                 if( Req->argc > 0 )
 433                         pattern = strtok( NULL, "," );
 434                 else
 435                         pattern = NULL;
 436         }
 437
 438         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 439 } /* IRC_LIST */
 440
 441
 442 GLOBAL bool
 443 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 444 {
 445         char modes_add[COMMAND_LEN], l[16], *ptr;
 446         CLIENT *from;
 447         CHANNEL *chan;
 448         int arg_topic;
 449
 450         assert( Client != NULL );
 451         assert( Req != NULL );
 452
 453         /* Bad number of parameters? */
 454         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 455
 456         /* Compatibility kludge */
 457         if( Req->argc == 5 ) arg_topic = 4;
 458         else if( Req->argc == 3 ) arg_topic = 2;
 459         else arg_topic = -1;
 460
 461         /* Search origin */
 462         from = Client_Search( Req->prefix );
 463         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 464
 465         /* Search or create channel */
 466         chan = Channel_Search( Req->argv[0] );
 467         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 468         if( ! chan ) return CONNECTED;
 469
 470         if( Req->argv[1][0] == '+' )
 471         {
 472                 ptr = Channel_Modes( chan );
 473                 if( ! *ptr )
 474                 {
 475                         /* OK, this channel doesn't have modes jet, set the received ones: */
 476                         Channel_SetModes( chan, &Req->argv[1][1] );
 477
 478                         if( Req->argc == 5 )
 479                         {
 480                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 481                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 482                         }
 483                         else
 484                         {
 485                                 /* Delete modes which we never want to inherit */
 486                                 Channel_ModeDel( chan, 'l' );
 487                                 Channel_ModeDel( chan, 'k' );
 488                         }
 489
 490                         strcpy( modes_add, "" );
 491                         ptr = Channel_Modes( chan );
 492                         while( *ptr )
 493                         {
 494                                 if( *ptr == 'l' )
 495                                 {
 496                                         snprintf( l, sizeof( l ), " %ld", Channel_MaxUsers( chan ));
 497                                         strlcat( modes_add, l, sizeof( modes_add ));
 498                                 }
 499                                 if( *ptr == 'k' )
 500                                 {
 501                                         strlcat( modes_add, " ", sizeof( modes_add ));
 502                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 503                                 }
 504                                 ptr++;
 505                         }
 506
 507                         /* Inform members of this channel */
 508                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 509                 }
 510         }
 511         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 512
 513         if( arg_topic > 0 )
 514         {
 515                 /* We got a topic */
 516                 ptr = Channel_Topic( chan );
 517                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 518                 {
 519                         /* OK, there is no topic jet */
 520                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 521                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 522                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 523                 }
 524         }
 525
 526         /* Forward CHANINFO to other serevrs */
 527         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] );
 528         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 529         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 530
 531         return CONNECTED;
 532 } /* IRC_CHANINFO */
 533
 534
 535 /* -eof- */