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 1.40 2007/07/31 18:56:14 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 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 < 1 || Req->argc > 2)
  56                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  57                                           Client_ID(Client), Req->command);
  58
  59         /* Who is the sender? */
  60         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
  61         else target = Client;
  62         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  63
  64         /* Are channel keys given? */
  65         if (Req->argc > 1) {
  66                 key = Req->argv[1];
  67                 key_ptr = strchr(key, ',');
  68                 if (key_ptr) *key_ptr = '\0';
  69         }
  70         else
  71                 key = key_ptr = NULL;
  72
  73         channame = Req->argv[0];
  74         channame_ptr = strchr(channame, ',');
  75         if (channame_ptr) *channame_ptr = '\0';
  76
  77         /* Channel-Namen durchgehen */
  78         while (channame)
  79         {
  80                 chan = NULL; flags = NULL;
  81
  82                 /* wird der Channel neu angelegt? */
  83                 if( Channel_Search( channame )) {
  84                         is_new_chan = false;
  85                 } else {
  86                         if (Conf_PredefChannelsOnly) { /* this server does not allow creation of channels */
  87                                 IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
  88                                 /* Try next name, if any */
  89                                 channame = strchr(channame, ',');
  90                                 continue;
  91                         }
  92                         is_new_chan = true;
  93                 }
  94
  95                 /* Hat ein Server Channel-User-Modes uebergeben? */
  96                 if( Client_Type( Client ) == CLIENT_SERVER )
  97                 {
  98                         /* Channel-Flags extrahieren */
  99                         flags = strchr( channame, 0x7 );
 100                         if( flags )
 101                         {
 102                                 *flags = '\0';
 103                                 flags++;
 104                         }
 105                 }
 106
 107                 /* Local client? */
 108                 if( Client_Type( Client ) == CLIENT_USER )
 109                 {
 110                         /* Test if the user has reached his maximum channel count */
 111                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 112                                 return IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 113                                                         Client_ID( Client ), channame );
 114
 115                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 116                         if( is_new_chan )
 117                         {
 118                                 /* Erster User im Channel: Operator-Flag setzen */
 119                                 flags = "o";
 120                         }
 121                         else
 122                         {
 123                                 /* Existierenden Channel suchen */
 124                                 chan = Channel_Search( channame );
 125                                 assert( chan != NULL );
 126
 127                                 is_banned = Lists_Check(Channel_GetListBans(chan), target );
 128                                 is_invited = Lists_Check(Channel_GetListInvites(chan), target );
 129
 130                                 /* Testen, ob Client gebanned ist */
 131                                 if(( is_banned == true) &&  ( is_invited == false ))
 132                                 {
 133                                         /* Client ist gebanned (und nicht invited): */
 134                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 135
 136                                         /* Try next name, if any */
 137                                         channame = strchr(channame, ',');
 138                                         continue;
 139                                 }
 140
 141                                 /* Ist der Channel "invite-only"? */
 142                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 143                                 {
 144                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 145                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 146
 147                                         /* Try next name, if any */
 148                                         channame = strchr(channame, ',');
 149                                         continue;
 150                                 }
 151
 152                                 /* Is the channel protected by a key? */
 153                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 154                                 {
 155                                         /* Bad channel key! */
 156                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 157
 158                                         /* Try next name, if any */
 159                                         channame = strchr(channame, ',');
 160                                         continue;
 161                                 }
 162
 163                                 /* Are there already too many members? */
 164                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 165                                 {
 166                                         /* Bad channel key! */
 167                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 168
 169                                         /* Try next name, if any */
 170                                         channame = strchr(channame, ',');
 171                                         continue;
 172                                 }
 173                         }
 174                 }
 175                 else
 176                 {
 177                         /* Remote server: we don't need to know whether the
 178                          * client is invited or not, but we have to make sure
 179                          * that the "one shot" entries (generated by INVITE
 180                          * commands) in this list become deleted when a user
 181                          * joins a channel this way. */
 182                         chan = Channel_Search( channame );
 183                         if( chan != NULL ) (void)Lists_Check(Channel_GetListInvites(chan), target);
 184                 }
 185
 186                 /* Channel joinen (und ggf. anlegen) */
 187                 if( ! Channel_Join( target, channame ))
 188                 {
 189                         /* naechsten Namen ermitteln */
 190                         channame = strchr(channame, ',');
 191                         continue;
 192                 }
 193                 if( ! chan ) chan = Channel_Search( channame );
 194                 assert( chan != NULL );
 195
 196                 /* Modes setzen (wenn vorhanden) */
 197                 while( flags && *flags )
 198                 {
 199                         Channel_UserModeAdd( chan, target, *flags );
 200                         flags++;
 201                 }
 202
 203                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 204                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 205
 206                 /* Muessen Modes an andere Server gemeldet werden? */
 207                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 208                 if( modes[1] ) modes[0] = 0x7;
 209                 else modes[0] = '\0';
 210
 211                 /* An andere Server weiterleiten */
 212                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 213
 214                 /* im Channel bekannt machen */
 215                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 216                 if( modes[1] )
 217                 {
 218                         /* Modes im Channel bekannt machen */
 219                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 220                 }
 221
 222                 if( Client_Type( Client ) == CLIENT_USER )
 223                 {
 224                         /* an Client bestaetigen */
 225                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 226
 227                         /* Send topic to client, if any */
 228                         topic = Channel_Topic(chan);
 229                         if (*topic) {
 230                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 231                                         Client_ID(Client), channame, topic);
 232 #ifndef STRICT_RFC
 233                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 234                                         Client_ID(Client), channame,
 235                                         Channel_TopicWho(chan),
 236                                         Channel_TopicTime(chan));
 237 #endif
 238                         }
 239
 240                         /* Mitglieder an Client Melden */
 241                         IRC_Send_NAMES( Client, chan );
 242                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 243                 }
 244
 245                 /* next channel? */
 246                 channame = channame_ptr;
 247                 if (channame) {
 248                         channame++;
 249                         channame_ptr = strchr(channame, ',');
 250                         if (channame_ptr) *channame_ptr = '\0';
 251
 252                         if (key_ptr) {
 253                                 key = ++key_ptr;
 254                                 key_ptr = strchr(key, ',');
 255                                 if (key_ptr) *key_ptr = '\0';
 256                         }
 257                 }
 258         }
 259         return CONNECTED;
 260 } /* IRC_JOIN */
 261
 262
 263 GLOBAL bool
 264 IRC_PART( CLIENT *Client, REQUEST *Req )
 265 {
 266         CLIENT *target;
 267         char *chan;
 268
 269         assert( Client != NULL );
 270         assert( Req != NULL );
 271
 272         /* Falsche Anzahl Parameter? */
 273         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 274
 275         /* Wer ist der Absender? */
 276         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 277         else target = Client;
 278         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 279
 280         /* Channel-Namen durchgehen */
 281         chan = strtok( Req->argv[0], "," );
 282         while( chan )
 283         {
 284                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 285                 {
 286                         /* naechsten Namen ermitteln */
 287                         chan = strtok( NULL, "," );
 288                         continue;
 289                 }
 290
 291                 /* naechsten Namen ermitteln */
 292                 chan = strtok( NULL, "," );
 293         }
 294         return CONNECTED;
 295 } /* IRC_PART */
 296
 297
 298 GLOBAL bool
 299 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 300 {
 301         CHANNEL *chan;
 302         CLIENT *from;
 303         char *topic;
 304         bool r;
 305
 306         assert( Client != NULL );
 307         assert( Req != NULL );
 308
 309         /* Falsche Anzahl Parameter? */
 310         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 311
 312         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 313         else from = Client;
 314         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 315
 316         /* Welcher Channel? */
 317         chan = Channel_Search( Req->argv[0] );
 318         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 319
 320         /* Ist der User Mitglied in dem Channel? */
 321         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 322
 323         if( Req->argc == 1 )
 324         {
 325                 /* Request actual topic */
 326                 topic = Channel_Topic(chan);
 327                 if (*topic) {
 328                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 329                                 Client_ID(Client), Channel_Name(chan), topic);
 330 #ifndef STRICT_RFC
 331                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 332                                 Client_ID(Client), Channel_Name(chan),
 333                                 Channel_TopicWho(chan),
 334                                 Channel_TopicTime(chan));
 335 #endif
 336                         return r;
 337                 }
 338                 else
 339                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 340                                         Client_ID(from), Channel_Name(chan));
 341         }
 342
 343         if( strchr( Channel_Modes( chan ), 't' ))
 344         {
 345                 /* Topic Lock. Ist der User ein Channel Operator? */
 346                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 347         }
 348
 349         /* Set new topic */
 350         Channel_SetTopic(chan, from, Req->argv[1]);
 351         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 352                 Client_Mask(from), Channel_Name(chan),
 353                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 354
 355         /* im Channel bekannt machen und an Server weiterleiten */
 356         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 357         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 358
 359         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 360         else return CONNECTED;
 361 } /* IRC_TOPIC */
 362
 363
 364 /**
 365  * Handler for the IRC "LIST" command.
 366  * This implementation handles the local case as well as the forwarding of the
 367  * LIST command to other servers in the IRC network.
 368  */
 369 GLOBAL bool
 370 IRC_LIST( CLIENT *Client, REQUEST *Req )
 371 {
 372         char *pattern;
 373         CHANNEL *chan;
 374         CLIENT *from, *target;
 375
 376         assert( Client != NULL );
 377         assert( Req != NULL );
 378
 379         /* Bad number of prameters? */
 380         if( Req->argc > 2 )
 381                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 382                         Client_ID( Client ), Req->command );
 383
 384         if( Req->argc > 0 )
 385                 pattern = strtok( Req->argv[0], "," );
 386         else
 387                 pattern = "*";
 388
 389         /* Get sender from prefix, if any */
 390         if( Client_Type( Client ) == CLIENT_SERVER )
 391                 from = Client_Search( Req->prefix );
 392         else
 393                 from = Client;
 394
 395         if( ! from )
 396                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 397                                 Client_ID( Client ), Req->prefix );
 398
 399         if( Req->argc == 2 )
 400         {
 401                 /* Forward to other server? */
 402                 target = Client_Search( Req->argv[1] );
 403                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 404                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 405                                         Client_ID( Client ), Req->argv[1] );
 406
 407                 if( target != Client_ThisServer( ))
 408                 {
 409                         /* Target is indeed an other server, forward it! */
 410                         return IRC_WriteStrClientPrefix( target, from,
 411                                         "LIST %s :%s", Client_ID( from ),
 412                                         Req->argv[1] );
 413                 }
 414         }
 415
 416         while( pattern )
 417         {
 418                 /* Loop through all the channels */
 419                 chan = Channel_First( );
 420                 while( chan )
 421                 {
 422                         /* Check search pattern */
 423                         if( Match( pattern, Channel_Name( chan )))
 424                         {
 425                                 /* Gotcha! */
 426                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 427                                     Channel_IsMemberOf( chan, from ))
 428                                 {
 429                                         if( ! IRC_WriteStrClient( from,
 430                                             RPL_LIST_MSG, Client_ID( from ),
 431                                             Channel_Name( chan ),
 432                                             Channel_MemberCount( chan ),
 433                                             Channel_Topic( chan )))
 434                                                 return DISCONNECTED;
 435                                 }
 436                         }
 437                         chan = Channel_Next( chan );
 438                 }
 439
 440                 /* Get next name ... */
 441                 if( Req->argc > 0 )
 442                         pattern = strtok( NULL, "," );
 443                 else
 444                         pattern = NULL;
 445         }
 446
 447         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 448 } /* IRC_LIST */
 449
 450
 451 GLOBAL bool
 452 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 453 {
 454         char modes_add[COMMAND_LEN], l[16], *ptr;
 455         CLIENT *from;
 456         CHANNEL *chan;
 457         int arg_topic;
 458
 459         assert( Client != NULL );
 460         assert( Req != NULL );
 461
 462         /* Bad number of parameters? */
 463         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 464
 465         /* Compatibility kludge */
 466         if( Req->argc == 5 ) arg_topic = 4;
 467         else if( Req->argc == 3 ) arg_topic = 2;
 468         else arg_topic = -1;
 469
 470         /* Search origin */
 471         from = Client_Search( Req->prefix );
 472         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 473
 474         /* Search or create channel */
 475         chan = Channel_Search( Req->argv[0] );
 476         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 477         if( ! chan ) return CONNECTED;
 478
 479         if( Req->argv[1][0] == '+' )
 480         {
 481                 ptr = Channel_Modes( chan );
 482                 if( ! *ptr )
 483                 {
 484                         /* OK, this channel doesn't have modes jet, set the received ones: */
 485                         Channel_SetModes( chan, &Req->argv[1][1] );
 486
 487                         if( Req->argc == 5 )
 488                         {
 489                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 490                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 491                         }
 492                         else
 493                         {
 494                                 /* Delete modes which we never want to inherit */
 495                                 Channel_ModeDel( chan, 'l' );
 496                                 Channel_ModeDel( chan, 'k' );
 497                         }
 498
 499                         strcpy( modes_add, "" );
 500                         ptr = Channel_Modes( chan );
 501                         while( *ptr )
 502                         {
 503                                 if( *ptr == 'l' )
 504                                 {
 505                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 506                                         strlcat( modes_add, l, sizeof( modes_add ));
 507                                 }
 508                                 if( *ptr == 'k' )
 509                                 {
 510                                         strlcat( modes_add, " ", sizeof( modes_add ));
 511                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 512                                 }
 513                                 ptr++;
 514                         }
 515
 516                         /* Inform members of this channel */
 517                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 518                 }
 519         }
 520         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 521
 522         if( arg_topic > 0 )
 523         {
 524                 /* We got a topic */
 525                 ptr = Channel_Topic( chan );
 526                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 527                 {
 528                         /* OK, there is no topic jet */
 529                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 530                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 531                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 532                 }
 533         }
 534
 535         /* Forward CHANINFO to other serevrs */
 536         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] );
 537         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 538         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 539
 540         return CONNECTED;
 541 } /* IRC_CHANINFO */
 542
 543
 544 /* -eof- */