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 1.38 2006/11/05 13:03:48 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 )) {
  82                         is_new_chan = false;
  83                 } else {
  84                         if (Conf_PredefChannelsOnly) { /* this server does not allow creation of channels */
  85                                 IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
  86                                 /* Try next name, if any */
  87                                 channame = strchr(channame, ',');
  88                                 continue;
  89                         }
  90                         is_new_chan = true;
  91                 }
  92
  93                 /* Hat ein Server Channel-User-Modes uebergeben? */
  94                 if( Client_Type( Client ) == CLIENT_SERVER )
  95                 {
  96                         /* Channel-Flags extrahieren */
  97                         flags = strchr( channame, 0x7 );
  98                         if( flags )
  99                         {
 100                                 *flags = '\0';
 101                                 flags++;
 102                         }
 103                 }
 104
 105                 /* Local client? */
 106                 if( Client_Type( Client ) == CLIENT_USER )
 107                 {
 108                         /* Test if the user has reached his maximum channel count */
 109                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 110                                 return IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 111                                                         Client_ID( Client ), channame );
 112
 113                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 114                         if( is_new_chan )
 115                         {
 116                                 /* Erster User im Channel: Operator-Flag setzen */
 117                                 flags = "o";
 118                         }
 119                         else
 120                         {
 121                                 /* Existierenden Channel suchen */
 122                                 chan = Channel_Search( channame );
 123                                 assert( chan != NULL );
 124
 125                                 is_banned = Lists_CheckBanned( target, chan );
 126                                 is_invited = Lists_CheckInvited( target, chan );
 127
 128                                 /* Testen, ob Client gebanned ist */
 129                                 if(( is_banned == true) &&  ( is_invited == false ))
 130                                 {
 131                                         /* Client ist gebanned (und nicht invited): */
 132                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 133
 134                                         /* Try next name, if any */
 135                                         channame = strchr(channame, ',');
 136                                         continue;
 137                                 }
 138
 139                                 /* Ist der Channel "invite-only"? */
 140                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 141                                 {
 142                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 143                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 144
 145                                         /* Try next name, if any */
 146                                         channame = strchr(channame, ',');
 147                                         continue;
 148                                 }
 149
 150                                 /* Is the channel protected by a key? */
 151                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 152                                 {
 153                                         /* Bad channel key! */
 154                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 155
 156                                         /* Try next name, if any */
 157                                         channame = strchr(channame, ',');
 158                                         continue;
 159                                 }
 160
 161                                 /* Are there already too many members? */
 162                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 163                                 {
 164                                         /* Bad channel key! */
 165                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 166
 167                                         /* Try next name, if any */
 168                                         channame = strchr(channame, ',');
 169                                         continue;
 170                                 }
 171                         }
 172                 }
 173                 else
 174                 {
 175                         /* Remote server: we don't need to know whether the
 176                          * client is invited or not, but we have to make sure
 177                          * that the "one shot" entries (generated by INVITE
 178                          * commands) in this list become deleted when a user
 179                          * joins a channel this way. */
 180                         chan = Channel_Search( channame );
 181                         if( chan != NULL ) (void)Lists_CheckInvited( target, chan );
 182                 }
 183
 184                 /* Channel joinen (und ggf. anlegen) */
 185                 if( ! Channel_Join( target, channame ))
 186                 {
 187                         /* naechsten Namen ermitteln */
 188                         channame = strchr(channame, ',');
 189                         continue;
 190                 }
 191                 if( ! chan ) chan = Channel_Search( channame );
 192                 assert( chan != NULL );
 193
 194                 /* Modes setzen (wenn vorhanden) */
 195                 while( flags && *flags )
 196                 {
 197                         Channel_UserModeAdd( chan, target, *flags );
 198                         flags++;
 199                 }
 200
 201                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 202                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 203
 204                 /* Muessen Modes an andere Server gemeldet werden? */
 205                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 206                 if( modes[1] ) modes[0] = 0x7;
 207                 else modes[0] = '\0';
 208
 209                 /* An andere Server weiterleiten */
 210                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 211
 212                 /* im Channel bekannt machen */
 213                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 214                 if( modes[1] )
 215                 {
 216                         /* Modes im Channel bekannt machen */
 217                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 218                 }
 219
 220                 if( Client_Type( Client ) == CLIENT_USER )
 221                 {
 222                         /* an Client bestaetigen */
 223                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 224
 225                         /* Send topic to client, if any */
 226                         topic = Channel_Topic(chan);
 227                         if (*topic) {
 228                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 229                                         Client_ID(Client), channame, topic);
 230 #ifndef STRICT_RFC
 231                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 232                                         Client_ID(Client), channame,
 233                                         Channel_TopicWho(chan),
 234                                         Channel_TopicTime(chan));
 235 #endif
 236                         }
 237
 238                         /* Mitglieder an Client Melden */
 239                         IRC_Send_NAMES( Client, chan );
 240                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 241                 }
 242
 243                 /* next channel? */
 244                 channame = channame_ptr;
 245                 if (channame) {
 246                         channame++;
 247                         channame_ptr = strchr(channame, ',');
 248                         if (channame_ptr) *channame_ptr = '\0';
 249
 250                         if (key_ptr) {
 251                                 key = ++key_ptr;
 252                                 key_ptr = strchr(key, ',');
 253                                 if (key_ptr) *key_ptr = '\0';
 254                         }
 255                 }
 256         }
 257         return CONNECTED;
 258 } /* IRC_JOIN */
 259
 260
 261 GLOBAL bool
 262 IRC_PART( CLIENT *Client, REQUEST *Req )
 263 {
 264         CLIENT *target;
 265         char *chan;
 266
 267         assert( Client != NULL );
 268         assert( Req != NULL );
 269
 270         /* Falsche Anzahl Parameter? */
 271         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 272
 273         /* Wer ist der Absender? */
 274         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 275         else target = Client;
 276         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 277
 278         /* Channel-Namen durchgehen */
 279         chan = strtok( Req->argv[0], "," );
 280         while( chan )
 281         {
 282                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 283                 {
 284                         /* naechsten Namen ermitteln */
 285                         chan = strtok( NULL, "," );
 286                         continue;
 287                 }
 288
 289                 /* naechsten Namen ermitteln */
 290                 chan = strtok( NULL, "," );
 291         }
 292         return CONNECTED;
 293 } /* IRC_PART */
 294
 295
 296 GLOBAL bool
 297 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 298 {
 299         CHANNEL *chan;
 300         CLIENT *from;
 301         char *topic;
 302         bool r;
 303
 304         assert( Client != NULL );
 305         assert( Req != NULL );
 306
 307         /* Falsche Anzahl Parameter? */
 308         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 309
 310         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 311         else from = Client;
 312         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 313
 314         /* Welcher Channel? */
 315         chan = Channel_Search( Req->argv[0] );
 316         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 317
 318         /* Ist der User Mitglied in dem Channel? */
 319         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 320
 321         if( Req->argc == 1 )
 322         {
 323                 /* Request actual topic */
 324                 topic = Channel_Topic(chan);
 325                 if (*topic) {
 326                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 327                                 Client_ID(Client), Channel_Name(chan), topic);
 328 #ifndef STRICT_RFC
 329                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 330                                 Client_ID(Client), Channel_Name(chan),
 331                                 Channel_TopicWho(chan),
 332                                 Channel_TopicTime(chan));
 333 #endif
 334                         return r;
 335                 }
 336                 else
 337                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 338                                         Client_ID(from), Channel_Name(chan));
 339         }
 340
 341         if( strchr( Channel_Modes( chan ), 't' ))
 342         {
 343                 /* Topic Lock. Ist der User ein Channel Operator? */
 344                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 345         }
 346
 347         /* Set new topic */
 348         Channel_SetTopic(chan, from, Req->argv[1]);
 349         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 350                 Client_Mask(from), Channel_Name(chan),
 351                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 352
 353         /* im Channel bekannt machen und an Server weiterleiten */
 354         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 355         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 356
 357         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 358         else return CONNECTED;
 359 } /* IRC_TOPIC */
 360
 361
 362 /**
 363  * Handler for the IRC "LIST" command.
 364  * This implementation handles the local case as well as the forwarding of the
 365  * LIST command to other servers in the IRC network.
 366  */
 367 GLOBAL bool
 368 IRC_LIST( CLIENT *Client, REQUEST *Req )
 369 {
 370         char *pattern;
 371         CHANNEL *chan;
 372         CLIENT *from, *target;
 373
 374         assert( Client != NULL );
 375         assert( Req != NULL );
 376
 377         /* Bad number of prameters? */
 378         if( Req->argc > 2 )
 379                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 380                         Client_ID( Client ), Req->command );
 381
 382         if( Req->argc > 0 )
 383                 pattern = strtok( Req->argv[0], "," );
 384         else
 385                 pattern = "*";
 386
 387         /* Get sender from prefix, if any */
 388         if( Client_Type( Client ) == CLIENT_SERVER )
 389                 from = Client_Search( Req->prefix );
 390         else
 391                 from = Client;
 392
 393         if( ! from )
 394                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 395                                 Client_ID( Client ), Req->prefix );
 396
 397         if( Req->argc == 2 )
 398         {
 399                 /* Forward to other server? */
 400                 target = Client_Search( Req->argv[1] );
 401                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 402                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 403                                         Client_ID( Client ), Req->argv[1] );
 404
 405                 if( target != Client_ThisServer( ))
 406                 {
 407                         /* Target is indeed an other server, forward it! */
 408                         return IRC_WriteStrClientPrefix( target, from,
 409                                         "LIST %s :%s", Client_ID( from ),
 410                                         Req->argv[1] );
 411                 }
 412         }
 413
 414         while( pattern )
 415         {
 416                 /* Loop through all the channels */
 417                 chan = Channel_First( );
 418                 while( chan )
 419                 {
 420                         /* Check search pattern */
 421                         if( Match( pattern, Channel_Name( chan )))
 422                         {
 423                                 /* Gotcha! */
 424                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 425                                     Channel_IsMemberOf( chan, from ))
 426                                 {
 427                                         if( ! IRC_WriteStrClient( from,
 428                                             RPL_LIST_MSG, Client_ID( from ),
 429                                             Channel_Name( chan ),
 430                                             Channel_MemberCount( chan ),
 431                                             Channel_Topic( chan )))
 432                                                 return DISCONNECTED;
 433                                 }
 434                         }
 435                         chan = Channel_Next( chan );
 436                 }
 437
 438                 /* Get next name ... */
 439                 if( Req->argc > 0 )
 440                         pattern = strtok( NULL, "," );
 441                 else
 442                         pattern = NULL;
 443         }
 444
 445         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 446 } /* IRC_LIST */
 447
 448
 449 GLOBAL bool
 450 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 451 {
 452         char modes_add[COMMAND_LEN], l[16], *ptr;
 453         CLIENT *from;
 454         CHANNEL *chan;
 455         int arg_topic;
 456
 457         assert( Client != NULL );
 458         assert( Req != NULL );
 459
 460         /* Bad number of parameters? */
 461         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 462
 463         /* Compatibility kludge */
 464         if( Req->argc == 5 ) arg_topic = 4;
 465         else if( Req->argc == 3 ) arg_topic = 2;
 466         else arg_topic = -1;
 467
 468         /* Search origin */
 469         from = Client_Search( Req->prefix );
 470         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 471
 472         /* Search or create channel */
 473         chan = Channel_Search( Req->argv[0] );
 474         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 475         if( ! chan ) return CONNECTED;
 476
 477         if( Req->argv[1][0] == '+' )
 478         {
 479                 ptr = Channel_Modes( chan );
 480                 if( ! *ptr )
 481                 {
 482                         /* OK, this channel doesn't have modes jet, set the received ones: */
 483                         Channel_SetModes( chan, &Req->argv[1][1] );
 484
 485                         if( Req->argc == 5 )
 486                         {
 487                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 488                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 489                         }
 490                         else
 491                         {
 492                                 /* Delete modes which we never want to inherit */
 493                                 Channel_ModeDel( chan, 'l' );
 494                                 Channel_ModeDel( chan, 'k' );
 495                         }
 496
 497                         strcpy( modes_add, "" );
 498                         ptr = Channel_Modes( chan );
 499                         while( *ptr )
 500                         {
 501                                 if( *ptr == 'l' )
 502                                 {
 503                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 504                                         strlcat( modes_add, l, sizeof( modes_add ));
 505                                 }
 506                                 if( *ptr == 'k' )
 507                                 {
 508                                         strlcat( modes_add, " ", sizeof( modes_add ));
 509                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 510                                 }
 511                                 ptr++;
 512                         }
 513
 514                         /* Inform members of this channel */
 515                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 516                 }
 517         }
 518         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 519
 520         if( arg_topic > 0 )
 521         {
 522                 /* We got a topic */
 523                 ptr = Channel_Topic( chan );
 524                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 525                 {
 526                         /* OK, there is no topic jet */
 527                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 528                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 529                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 530                 }
 531         }
 532
 533         /* Forward CHANINFO to other serevrs */
 534         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] );
 535         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 536         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 537
 538         return CONNECTED;
 539 } /* IRC_CHANINFO */
 540
 541
 542 /* -eof- */