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 1.40.2.2 2008/02/26 12:07:41 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                 if (Client_Type(Client) == CLIENT_SERVER) {
  83                         flags = strchr( channame, 0x7 );
  84                         if( flags ) {
  85                                 *flags = '\0';
  86                                 flags++;
  87                         }
  88                 }
  89
  90                 /* wird der Channel neu angelegt? */
  91                 if( Channel_Search( channame )) {
  92                         is_new_chan = false;
  93                 } else {
  94                         if (Conf_PredefChannelsOnly) { /* this server does not allow creation of channels */
  95                                 IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
  96                                 /* Try next name, if any */
  97                                 channame = strchr(channame, ',');
  98                                 continue;
  99                         }
 100                         is_new_chan = true;
 101                 }
 102
 103                 /* Local client? */
 104                 if( Client_Type( Client ) == CLIENT_USER )
 105                 {
 106                         /* Test if the user has reached his maximum channel count */
 107                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 108                                 return IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 109                                                         Client_ID( Client ), channame );
 110
 111                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 112                         if( is_new_chan )
 113                         {
 114                                 /* Erster User im Channel: Operator-Flag setzen */
 115                                 flags = "o";
 116                         }
 117                         else
 118                         {
 119                                 /* Existierenden Channel suchen */
 120                                 chan = Channel_Search( channame );
 121                                 assert( chan != NULL );
 122
 123                                 is_banned = Lists_Check(Channel_GetListBans(chan), target );
 124                                 is_invited = Lists_Check(Channel_GetListInvites(chan), target );
 125
 126                                 /* Testen, ob Client gebanned ist */
 127                                 if(( is_banned == true) &&  ( is_invited == false ))
 128                                 {
 129                                         /* Client ist gebanned (und nicht invited): */
 130                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 131
 132                                         /* Try next name, if any */
 133                                         channame = strchr(channame, ',');
 134                                         continue;
 135                                 }
 136
 137                                 /* Ist der Channel "invite-only"? */
 138                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 139                                 {
 140                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 141                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 142
 143                                         /* Try next name, if any */
 144                                         channame = strchr(channame, ',');
 145                                         continue;
 146                                 }
 147
 148                                 /* Is the channel protected by a key? */
 149                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 150                                 {
 151                                         /* Bad channel key! */
 152                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 153
 154                                         /* Try next name, if any */
 155                                         channame = strchr(channame, ',');
 156                                         continue;
 157                                 }
 158
 159                                 /* Are there already too many members? */
 160                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 161                                 {
 162                                         /* Bad channel key! */
 163                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 164
 165                                         /* Try next name, if any */
 166                                         channame = strchr(channame, ',');
 167                                         continue;
 168                                 }
 169                         }
 170                 }
 171                 else
 172                 {
 173                         /* Remote server: we don't need to know whether the
 174                          * client is invited or not, but we have to make sure
 175                          * that the "one shot" entries (generated by INVITE
 176                          * commands) in this list become deleted when a user
 177                          * joins a channel this way. */
 178                         chan = Channel_Search( channame );
 179                         if( chan != NULL ) (void)Lists_Check(Channel_GetListInvites(chan), target);
 180                 }
 181
 182                 /* Channel joinen (und ggf. anlegen) */
 183                 if( ! Channel_Join( target, channame ))
 184                 {
 185                         /* naechsten Namen ermitteln */
 186                         channame = strchr(channame, ',');
 187                         continue;
 188                 }
 189                 if( ! chan ) chan = Channel_Search( channame );
 190                 assert( chan != NULL );
 191
 192                 /* Modes setzen (wenn vorhanden) */
 193                 while( flags && *flags )
 194                 {
 195                         Channel_UserModeAdd( chan, target, *flags );
 196                         flags++;
 197                 }
 198
 199                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 200                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 201
 202                 /* Muessen Modes an andere Server gemeldet werden? */
 203                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 204                 if( modes[1] ) modes[0] = 0x7;
 205                 else modes[0] = '\0';
 206
 207                 /* An andere Server weiterleiten */
 208                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 209
 210                 /* im Channel bekannt machen */
 211                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 212                 if( modes[1] )
 213                 {
 214                         /* Modes im Channel bekannt machen */
 215                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 216                 }
 217
 218                 if( Client_Type( Client ) == CLIENT_USER )
 219                 {
 220                         /* an Client bestaetigen */
 221                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 222
 223                         /* Send topic to client, if any */
 224                         topic = Channel_Topic(chan);
 225                         if (*topic) {
 226                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 227                                         Client_ID(Client), channame, topic);
 228 #ifndef STRICT_RFC
 229                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 230                                         Client_ID(Client), channame,
 231                                         Channel_TopicWho(chan),
 232                                         Channel_TopicTime(chan));
 233 #endif
 234                         }
 235
 236                         /* Mitglieder an Client Melden */
 237                         IRC_Send_NAMES( Client, chan );
 238                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 239                 }
 240
 241                 /* next channel? */
 242                 channame = channame_ptr;
 243                 if (channame) {
 244                         channame++;
 245                         channame_ptr = strchr(channame, ',');
 246                         if (channame_ptr) *channame_ptr = '\0';
 247
 248                         if (key_ptr) {
 249                                 key = ++key_ptr;
 250                                 key_ptr = strchr(key, ',');
 251                                 if (key_ptr) *key_ptr = '\0';
 252                         }
 253                 }
 254         }
 255         return CONNECTED;
 256 } /* IRC_JOIN */
 257
 258
 259 GLOBAL bool
 260 IRC_PART( CLIENT *Client, REQUEST *Req )
 261 {
 262         CLIENT *target;
 263         char *chan;
 264
 265         assert( Client != NULL );
 266         assert( Req != NULL );
 267
 268         if (Req->argc < 1 || Req->argc > 2)
 269                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 270                                         Client_ID(Client), Req->command);
 271
 272         /* Wer ist der Absender? */
 273         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 274         else target = Client;
 275         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 276
 277         /* Channel-Namen durchgehen */
 278         chan = strtok(Req->argv[0], ",");
 279         while (chan) {
 280                 Channel_Part(target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 281
 282                 chan = strtok(NULL, ",");
 283         }
 284         return CONNECTED;
 285 } /* IRC_PART */
 286
 287
 288 GLOBAL bool
 289 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 290 {
 291         CHANNEL *chan;
 292         CLIENT *from;
 293         char *topic;
 294         bool r;
 295
 296         assert( Client != NULL );
 297         assert( Req != NULL );
 298
 299         /* Falsche Anzahl Parameter? */
 300         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 301
 302         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 303         else from = Client;
 304         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 305
 306         /* Welcher Channel? */
 307         chan = Channel_Search( Req->argv[0] );
 308         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 309
 310         /* Ist der User Mitglied in dem Channel? */
 311         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 312
 313         if( Req->argc == 1 )
 314         {
 315                 /* Request actual topic */
 316                 topic = Channel_Topic(chan);
 317                 if (*topic) {
 318                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 319                                 Client_ID(Client), Channel_Name(chan), topic);
 320 #ifndef STRICT_RFC
 321                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 322                                 Client_ID(Client), Channel_Name(chan),
 323                                 Channel_TopicWho(chan),
 324                                 Channel_TopicTime(chan));
 325 #endif
 326                         return r;
 327                 }
 328                 else
 329                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 330                                         Client_ID(from), Channel_Name(chan));
 331         }
 332
 333         if( strchr( Channel_Modes( chan ), 't' ))
 334         {
 335                 /* Topic Lock. Ist der User ein Channel Operator? */
 336                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 337         }
 338
 339         /* Set new topic */
 340         Channel_SetTopic(chan, from, Req->argv[1]);
 341         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 342                 Client_Mask(from), Channel_Name(chan),
 343                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 344
 345         /* im Channel bekannt machen und an Server weiterleiten */
 346         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 347         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 348
 349         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 350         else return CONNECTED;
 351 } /* IRC_TOPIC */
 352
 353
 354 /**
 355  * Handler for the IRC "LIST" command.
 356  * This implementation handles the local case as well as the forwarding of the
 357  * LIST command to other servers in the IRC network.
 358  */
 359 GLOBAL bool
 360 IRC_LIST( CLIENT *Client, REQUEST *Req )
 361 {
 362         char *pattern;
 363         CHANNEL *chan;
 364         CLIENT *from, *target;
 365
 366         assert( Client != NULL );
 367         assert( Req != NULL );
 368
 369         /* Bad number of prameters? */
 370         if( Req->argc > 2 )
 371                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 372                         Client_ID( Client ), Req->command );
 373
 374         if( Req->argc > 0 )
 375                 pattern = strtok( Req->argv[0], "," );
 376         else
 377                 pattern = "*";
 378
 379         /* Get sender from prefix, if any */
 380         if( Client_Type( Client ) == CLIENT_SERVER )
 381                 from = Client_Search( Req->prefix );
 382         else
 383                 from = Client;
 384
 385         if( ! from )
 386                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 387                                 Client_ID( Client ), Req->prefix );
 388
 389         if( Req->argc == 2 )
 390         {
 391                 /* Forward to other server? */
 392                 target = Client_Search( Req->argv[1] );
 393                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 394                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 395                                         Client_ID( Client ), Req->argv[1] );
 396
 397                 if( target != Client_ThisServer( ))
 398                 {
 399                         /* Target is indeed an other server, forward it! */
 400                         return IRC_WriteStrClientPrefix( target, from,
 401                                         "LIST %s :%s", Client_ID( from ),
 402                                         Req->argv[1] );
 403                 }
 404         }
 405
 406         while( pattern )
 407         {
 408                 /* Loop through all the channels */
 409                 chan = Channel_First( );
 410                 while( chan )
 411                 {
 412                         /* Check search pattern */
 413                         if( Match( pattern, Channel_Name( chan )))
 414                         {
 415                                 /* Gotcha! */
 416                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 417                                     Channel_IsMemberOf( chan, from ))
 418                                 {
 419                                         if( ! IRC_WriteStrClient( from,
 420                                             RPL_LIST_MSG, Client_ID( from ),
 421                                             Channel_Name( chan ),
 422                                             Channel_MemberCount( chan ),
 423                                             Channel_Topic( chan )))
 424                                                 return DISCONNECTED;
 425                                 }
 426                         }
 427                         chan = Channel_Next( chan );
 428                 }
 429
 430                 /* Get next name ... */
 431                 if( Req->argc > 0 )
 432                         pattern = strtok( NULL, "," );
 433                 else
 434                         pattern = NULL;
 435         }
 436
 437         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 438 } /* IRC_LIST */
 439
 440
 441 GLOBAL bool
 442 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 443 {
 444         char modes_add[COMMAND_LEN], l[16], *ptr;
 445         CLIENT *from;
 446         CHANNEL *chan;
 447         int arg_topic;
 448
 449         assert( Client != NULL );
 450         assert( Req != NULL );
 451
 452         /* Bad number of parameters? */
 453         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 454
 455         /* Compatibility kludge */
 456         if( Req->argc == 5 ) arg_topic = 4;
 457         else if( Req->argc == 3 ) arg_topic = 2;
 458         else arg_topic = -1;
 459
 460         /* Search origin */
 461         from = Client_Search( Req->prefix );
 462         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 463
 464         /* Search or create channel */
 465         chan = Channel_Search( Req->argv[0] );
 466         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 467         if( ! chan ) return CONNECTED;
 468
 469         if( Req->argv[1][0] == '+' )
 470         {
 471                 ptr = Channel_Modes( chan );
 472                 if( ! *ptr )
 473                 {
 474                         /* OK, this channel doesn't have modes jet, set the received ones: */
 475                         Channel_SetModes( chan, &Req->argv[1][1] );
 476
 477                         if( Req->argc == 5 )
 478                         {
 479                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 480                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 481                         }
 482                         else
 483                         {
 484                                 /* Delete modes which we never want to inherit */
 485                                 Channel_ModeDel( chan, 'l' );
 486                                 Channel_ModeDel( chan, 'k' );
 487                         }
 488
 489                         strcpy( modes_add, "" );
 490                         ptr = Channel_Modes( chan );
 491                         while( *ptr )
 492                         {
 493                                 if( *ptr == 'l' )
 494                                 {
 495                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 496                                         strlcat( modes_add, l, sizeof( modes_add ));
 497                                 }
 498                                 if( *ptr == 'k' )
 499                                 {
 500                                         strlcat( modes_add, " ", sizeof( modes_add ));
 501                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 502                                 }
 503                                 ptr++;
 504                         }
 505
 506                         /* Inform members of this channel */
 507                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 508                 }
 509         }
 510         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 511
 512         if( arg_topic > 0 )
 513         {
 514                 /* We got a topic */
 515                 ptr = Channel_Topic( chan );
 516                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 517                 {
 518                         /* OK, there is no topic jet */
 519                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 520                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 521                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 522                 }
 523         }
 524
 525         /* Forward CHANINFO to other serevrs */
 526         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] );
 527         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 528         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 529
 530         return CONNECTED;
 531 } /* IRC_CHANINFO */
 532
 533
 534 /* -eof- */