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 1.41 2008/01/07 11:42:00 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 < 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         if (Req->argc < 1 || Req->argc > 2)
 273                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 274                                         Client_ID(Client), Req->command);
 275
 276         /* Wer ist der Absender? */
 277         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 278         else target = Client;
 279         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 280
 281         /* Channel-Namen durchgehen */
 282         chan = strtok(Req->argv[0], ",");
 283         while (chan) {
 284                 Channel_Part(target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 285
 286                 chan = strtok(NULL, ",");
 287         }
 288         return CONNECTED;
 289 } /* IRC_PART */
 290
 291
 292 GLOBAL bool
 293 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 294 {
 295         CHANNEL *chan;
 296         CLIENT *from;
 297         char *topic;
 298         bool r;
 299
 300         assert( Client != NULL );
 301         assert( Req != NULL );
 302
 303         /* Falsche Anzahl Parameter? */
 304         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 305
 306         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 307         else from = Client;
 308         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 309
 310         /* Welcher Channel? */
 311         chan = Channel_Search( Req->argv[0] );
 312         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 313
 314         /* Ist der User Mitglied in dem Channel? */
 315         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 316
 317         if( Req->argc == 1 )
 318         {
 319                 /* Request actual topic */
 320                 topic = Channel_Topic(chan);
 321                 if (*topic) {
 322                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 323                                 Client_ID(Client), Channel_Name(chan), topic);
 324 #ifndef STRICT_RFC
 325                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 326                                 Client_ID(Client), Channel_Name(chan),
 327                                 Channel_TopicWho(chan),
 328                                 Channel_TopicTime(chan));
 329 #endif
 330                         return r;
 331                 }
 332                 else
 333                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 334                                         Client_ID(from), Channel_Name(chan));
 335         }
 336
 337         if( strchr( Channel_Modes( chan ), 't' ))
 338         {
 339                 /* Topic Lock. Ist der User ein Channel Operator? */
 340                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 341         }
 342
 343         /* Set new topic */
 344         Channel_SetTopic(chan, from, Req->argv[1]);
 345         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 346                 Client_Mask(from), Channel_Name(chan),
 347                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 348
 349         /* im Channel bekannt machen und an Server weiterleiten */
 350         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 351         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 352
 353         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 354         else return CONNECTED;
 355 } /* IRC_TOPIC */
 356
 357
 358 /**
 359  * Handler for the IRC "LIST" command.
 360  * This implementation handles the local case as well as the forwarding of the
 361  * LIST command to other servers in the IRC network.
 362  */
 363 GLOBAL bool
 364 IRC_LIST( CLIENT *Client, REQUEST *Req )
 365 {
 366         char *pattern;
 367         CHANNEL *chan;
 368         CLIENT *from, *target;
 369
 370         assert( Client != NULL );
 371         assert( Req != NULL );
 372
 373         /* Bad number of prameters? */
 374         if( Req->argc > 2 )
 375                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 376                         Client_ID( Client ), Req->command );
 377
 378         if( Req->argc > 0 )
 379                 pattern = strtok( Req->argv[0], "," );
 380         else
 381                 pattern = "*";
 382
 383         /* Get sender from prefix, if any */
 384         if( Client_Type( Client ) == CLIENT_SERVER )
 385                 from = Client_Search( Req->prefix );
 386         else
 387                 from = Client;
 388
 389         if( ! from )
 390                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 391                                 Client_ID( Client ), Req->prefix );
 392
 393         if( Req->argc == 2 )
 394         {
 395                 /* Forward to other server? */
 396                 target = Client_Search( Req->argv[1] );
 397                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 398                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 399                                         Client_ID( Client ), Req->argv[1] );
 400
 401                 if( target != Client_ThisServer( ))
 402                 {
 403                         /* Target is indeed an other server, forward it! */
 404                         return IRC_WriteStrClientPrefix( target, from,
 405                                         "LIST %s :%s", Client_ID( from ),
 406                                         Req->argv[1] );
 407                 }
 408         }
 409
 410         while( pattern )
 411         {
 412                 /* Loop through all the channels */
 413                 chan = Channel_First( );
 414                 while( chan )
 415                 {
 416                         /* Check search pattern */
 417                         if( Match( pattern, Channel_Name( chan )))
 418                         {
 419                                 /* Gotcha! */
 420                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 421                                     Channel_IsMemberOf( chan, from ))
 422                                 {
 423                                         if( ! IRC_WriteStrClient( from,
 424                                             RPL_LIST_MSG, Client_ID( from ),
 425                                             Channel_Name( chan ),
 426                                             Channel_MemberCount( chan ),
 427                                             Channel_Topic( chan )))
 428                                                 return DISCONNECTED;
 429                                 }
 430                         }
 431                         chan = Channel_Next( chan );
 432                 }
 433
 434                 /* Get next name ... */
 435                 if( Req->argc > 0 )
 436                         pattern = strtok( NULL, "," );
 437                 else
 438                         pattern = NULL;
 439         }
 440
 441         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 442 } /* IRC_LIST */
 443
 444
 445 GLOBAL bool
 446 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 447 {
 448         char modes_add[COMMAND_LEN], l[16], *ptr;
 449         CLIENT *from;
 450         CHANNEL *chan;
 451         int arg_topic;
 452
 453         assert( Client != NULL );
 454         assert( Req != NULL );
 455
 456         /* Bad number of parameters? */
 457         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 458
 459         /* Compatibility kludge */
 460         if( Req->argc == 5 ) arg_topic = 4;
 461         else if( Req->argc == 3 ) arg_topic = 2;
 462         else arg_topic = -1;
 463
 464         /* Search origin */
 465         from = Client_Search( Req->prefix );
 466         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 467
 468         /* Search or create channel */
 469         chan = Channel_Search( Req->argv[0] );
 470         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 471         if( ! chan ) return CONNECTED;
 472
 473         if( Req->argv[1][0] == '+' )
 474         {
 475                 ptr = Channel_Modes( chan );
 476                 if( ! *ptr )
 477                 {
 478                         /* OK, this channel doesn't have modes jet, set the received ones: */
 479                         Channel_SetModes( chan, &Req->argv[1][1] );
 480
 481                         if( Req->argc == 5 )
 482                         {
 483                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 484                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 485                         }
 486                         else
 487                         {
 488                                 /* Delete modes which we never want to inherit */
 489                                 Channel_ModeDel( chan, 'l' );
 490                                 Channel_ModeDel( chan, 'k' );
 491                         }
 492
 493                         strcpy( modes_add, "" );
 494                         ptr = Channel_Modes( chan );
 495                         while( *ptr )
 496                         {
 497                                 if( *ptr == 'l' )
 498                                 {
 499                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 500                                         strlcat( modes_add, l, sizeof( modes_add ));
 501                                 }
 502                                 if( *ptr == 'k' )
 503                                 {
 504                                         strlcat( modes_add, " ", sizeof( modes_add ));
 505                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 506                                 }
 507                                 ptr++;
 508                         }
 509
 510                         /* Inform members of this channel */
 511                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 512                 }
 513         }
 514         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 515
 516         if( arg_topic > 0 )
 517         {
 518                 /* We got a topic */
 519                 ptr = Channel_Topic( chan );
 520                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 521                 {
 522                         /* OK, there is no topic jet */
 523                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 524                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 525                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 526                 }
 527         }
 528
 529         /* Forward CHANINFO to other serevrs */
 530         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] );
 531         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 532         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 533
 534         return CONNECTED;
 535 } /* IRC_CHANINFO */
 536
 537
 538 /* -eof- */