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 1.36 2006/10/05 18:26:54 fw Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "defines.h"
  26 #include "conn.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "lists.h"
  30 #include "log.h"
  31 #include "match.h"
  32 #include "messages.h"
  33 #include "parse.h"
  34 #include "irc-info.h"
  35 #include "irc-write.h"
  36 #include "resolve.h"
  37 #include "conf.h"
  38
  39 #include "exp.h"
  40 #include "irc-channel.h"
  41
  42
  43 GLOBAL bool
  44 IRC_JOIN( CLIENT *Client, REQUEST *Req )
  45 {
  46         char *channame, *channame_ptr, *key, *key_ptr, *flags, *topic, modes[8];
  47         bool is_new_chan, is_invited, is_banned;
  48         CLIENT *target;
  49         CHANNEL *chan;
  50
  51         assert( Client != NULL );
  52         assert( Req != NULL );
  53
  54         /* Bad number of arguments? */
  55         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  56
  57         /* Who is the sender? */
  58         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
  59         else target = Client;
  60         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  61
  62         /* Are channel keys given? */
  63         if (Req->argc > 1) {
  64                 key = Req->argv[1];
  65                 key_ptr = strchr(key, ',');
  66                 if (key_ptr) *key_ptr = '\0';
  67         }
  68         else
  69                 key = key_ptr = NULL;
  70
  71         channame = Req->argv[0];
  72         channame_ptr = strchr(channame, ',');
  73         if (channame_ptr) *channame_ptr = '\0';
  74
  75         /* Channel-Namen durchgehen */
  76         while (channame)
  77         {
  78                 chan = NULL; flags = NULL;
  79
  80                 /* wird der Channel neu angelegt? */
  81                 if( Channel_Search( channame )) is_new_chan = false;
  82                 else is_new_chan = true;
  83
  84                 /* Hat ein Server Channel-User-Modes uebergeben? */
  85                 if( Client_Type( Client ) == CLIENT_SERVER )
  86                 {
  87                         /* Channel-Flags extrahieren */
  88                         flags = strchr( channame, 0x7 );
  89                         if( flags )
  90                         {
  91                                 *flags = '\0';
  92                                 flags++;
  93                         }
  94                 }
  95
  96                 /* Local client? */
  97                 if( Client_Type( Client ) == CLIENT_USER )
  98                 {
  99                         /* Test if the user has reached his maximum channel count */
 100                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 101                                 return IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 102                                                         Client_ID( Client ), channame );
 103
 104                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 105                         if( is_new_chan )
 106                         {
 107                                 /* Erster User im Channel: Operator-Flag setzen */
 108                                 flags = "o";
 109                         }
 110                         else
 111                         {
 112                                 /* Existierenden Channel suchen */
 113                                 chan = Channel_Search( channame );
 114                                 assert( chan != NULL );
 115
 116                                 is_banned = Lists_CheckBanned( target, chan );
 117                                 is_invited = Lists_CheckInvited( target, chan );
 118
 119                                 /* Testen, ob Client gebanned ist */
 120                                 if(( is_banned == true) &&  ( is_invited == false ))
 121                                 {
 122                                         /* Client ist gebanned (und nicht invited): */
 123                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 124
 125                                         /* Try next name, if any */
 126                                         channame = strchr(channame, ',');
 127                                         continue;
 128                                 }
 129
 130                                 /* Ist der Channel "invite-only"? */
 131                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 132                                 {
 133                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 134                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 135
 136                                         /* Try next name, if any */
 137                                         channame = strchr(channame, ',');
 138                                         continue;
 139                                 }
 140
 141                                 /* Is the channel protected by a key? */
 142                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 143                                 {
 144                                         /* Bad channel key! */
 145                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 146
 147                                         /* Try next name, if any */
 148                                         channame = strchr(channame, ',');
 149                                         continue;
 150                                 }
 151
 152                                 /* Are there already too many members? */
 153                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 154                                 {
 155                                         /* Bad channel key! */
 156                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 157
 158                                         /* Try next name, if any */
 159                                         channame = strchr(channame, ',');
 160                                         continue;
 161                                 }
 162                         }
 163                 }
 164                 else
 165                 {
 166                         /* Remote server: we don't need to know whether the
 167                          * client is invited or not, but we have to make sure
 168                          * that the "one shot" entries (generated by INVITE
 169                          * commands) in this list become deleted when a user
 170                          * joins a channel this way. */
 171                         chan = Channel_Search( channame );
 172                         if( chan != NULL ) (void)Lists_CheckInvited( target, chan );
 173                 }
 174
 175                 /* Channel joinen (und ggf. anlegen) */
 176                 if( ! Channel_Join( target, channame ))
 177                 {
 178                         /* naechsten Namen ermitteln */
 179                         channame = strchr(channame, ',');
 180                         continue;
 181                 }
 182                 if( ! chan ) chan = Channel_Search( channame );
 183                 assert( chan != NULL );
 184
 185                 /* Modes setzen (wenn vorhanden) */
 186                 while( flags && *flags )
 187                 {
 188                         Channel_UserModeAdd( chan, target, *flags );
 189                         flags++;
 190                 }
 191
 192                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 193                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 194
 195                 /* Muessen Modes an andere Server gemeldet werden? */
 196                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 197                 if( modes[1] ) modes[0] = 0x7;
 198                 else modes[0] = '\0';
 199
 200                 /* An andere Server weiterleiten */
 201                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 202
 203                 /* im Channel bekannt machen */
 204                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 205                 if( modes[1] )
 206                 {
 207                         /* Modes im Channel bekannt machen */
 208                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 209                 }
 210
 211                 if( Client_Type( Client ) == CLIENT_USER )
 212                 {
 213                         /* an Client bestaetigen */
 214                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 215
 216                         /* Send topic to client, if any */
 217                         topic = Channel_Topic(chan);
 218                         if (*topic) {
 219                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 220                                         Client_ID(Client), channame, topic);
 221 #ifndef STRICT_RFC
 222                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 223                                         Client_ID(Client), channame,
 224                                         Channel_TopicWho(chan),
 225                                         Channel_TopicTime(chan));
 226 #endif
 227                         }
 228
 229                         /* Mitglieder an Client Melden */
 230                         IRC_Send_NAMES( Client, chan );
 231                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 232                 }
 233
 234                 /* next channel? */
 235                 channame = channame_ptr;
 236                 if (channame) {
 237                         channame++;
 238                         channame_ptr = strchr(channame, ',');
 239                         if (channame_ptr) *channame_ptr = '\0';
 240
 241                         if (key_ptr) {
 242                                 key = ++key_ptr;
 243                                 key_ptr = strchr(key, ',');
 244                                 if (key_ptr) *key_ptr = '\0';
 245                         }
 246                 }
 247         }
 248         return CONNECTED;
 249 } /* IRC_JOIN */
 250
 251
 252 GLOBAL bool
 253 IRC_PART( CLIENT *Client, REQUEST *Req )
 254 {
 255         CLIENT *target;
 256         char *chan;
 257
 258         assert( Client != NULL );
 259         assert( Req != NULL );
 260
 261         /* Falsche Anzahl Parameter? */
 262         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 263
 264         /* Wer ist der Absender? */
 265         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 266         else target = Client;
 267         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 268
 269         /* Channel-Namen durchgehen */
 270         chan = strtok( Req->argv[0], "," );
 271         while( chan )
 272         {
 273                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 274                 {
 275                         /* naechsten Namen ermitteln */
 276                         chan = strtok( NULL, "," );
 277                         continue;
 278                 }
 279
 280                 /* naechsten Namen ermitteln */
 281                 chan = strtok( NULL, "," );
 282         }
 283         return CONNECTED;
 284 } /* IRC_PART */
 285
 286
 287 GLOBAL bool
 288 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 289 {
 290         CHANNEL *chan;
 291         CLIENT *from;
 292         char *topic;
 293         bool r;
 294
 295         assert( Client != NULL );
 296         assert( Req != NULL );
 297
 298         /* Falsche Anzahl Parameter? */
 299         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 300
 301         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 302         else from = Client;
 303         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 304
 305         /* Welcher Channel? */
 306         chan = Channel_Search( Req->argv[0] );
 307         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 308
 309         /* Ist der User Mitglied in dem Channel? */
 310         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 311
 312         if( Req->argc == 1 )
 313         {
 314                 /* Request actual topic */
 315                 topic = Channel_Topic(chan);
 316                 if (*topic) {
 317                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 318                                 Client_ID(Client), Channel_Name(chan), topic);
 319 #ifndef STRICT_RFC
 320                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 321                                 Client_ID(Client), Channel_Name(chan),
 322                                 Channel_TopicWho(chan),
 323                                 Channel_TopicTime(chan));
 324 #endif
 325                         return r;
 326                 }
 327                 else
 328                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 329                                         Client_ID(from), Channel_Name(chan));
 330         }
 331
 332         if( strchr( Channel_Modes( chan ), 't' ))
 333         {
 334                 /* Topic Lock. Ist der User ein Channel Operator? */
 335                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 336         }
 337
 338         /* Set new topic */
 339         Channel_SetTopic(chan, from, Req->argv[1]);
 340         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 341                 Client_Mask(from), Channel_Name(chan),
 342                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 343
 344         /* im Channel bekannt machen und an Server weiterleiten */
 345         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 346         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 347
 348         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 349         else return CONNECTED;
 350 } /* IRC_TOPIC */
 351
 352
 353 /**
 354  * Handler for the IRC "LIST" command.
 355  * This implementation handles the local case as well as the forwarding of the
 356  * LIST command to other servers in the IRC network.
 357  */
 358 GLOBAL bool
 359 IRC_LIST( CLIENT *Client, REQUEST *Req )
 360 {
 361         char *pattern;
 362         CHANNEL *chan;
 363         CLIENT *from, *target;
 364
 365         assert( Client != NULL );
 366         assert( Req != NULL );
 367
 368         /* Bad number of prameters? */
 369         if( Req->argc > 2 )
 370                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 371                         Client_ID( Client ), Req->command );
 372
 373         if( Req->argc > 0 )
 374                 pattern = strtok( Req->argv[0], "," );
 375         else
 376                 pattern = "*";
 377
 378         /* Get sender from prefix, if any */
 379         if( Client_Type( Client ) == CLIENT_SERVER )
 380                 from = Client_Search( Req->prefix );
 381         else
 382                 from = Client;
 383
 384         if( ! from )
 385                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 386                                 Client_ID( Client ), Req->prefix );
 387
 388         if( Req->argc == 2 )
 389         {
 390                 /* Forward to other server? */
 391                 target = Client_Search( Req->argv[1] );
 392                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 393                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 394                                         Client_ID( Client ), Req->argv[1] );
 395
 396                 if( target != Client_ThisServer( ))
 397                 {
 398                         /* Target is indeed an other server, forward it! */
 399                         return IRC_WriteStrClientPrefix( target, from,
 400                                         "LIST %s :%s", Client_ID( from ),
 401                                         Req->argv[1] );
 402                 }
 403         }
 404
 405         while( pattern )
 406         {
 407                 /* Loop through all the channels */
 408                 chan = Channel_First( );
 409                 while( chan )
 410                 {
 411                         /* Check search pattern */
 412                         if( Match( pattern, Channel_Name( chan )))
 413                         {
 414                                 /* Gotcha! */
 415                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 416                                     Channel_IsMemberOf( chan, from ))
 417                                 {
 418                                         if( ! IRC_WriteStrClient( from,
 419                                             RPL_LIST_MSG, Client_ID( from ),
 420                                             Channel_Name( chan ),
 421                                             Channel_MemberCount( chan ),
 422                                             Channel_Topic( chan )))
 423                                                 return DISCONNECTED;
 424                                 }
 425                         }
 426                         chan = Channel_Next( chan );
 427                 }
 428
 429                 /* Get next name ... */
 430                 if( Req->argc > 0 )
 431                         pattern = strtok( NULL, "," );
 432                 else
 433                         pattern = NULL;
 434         }
 435
 436         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 437 } /* IRC_LIST */
 438
 439
 440 GLOBAL bool
 441 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 442 {
 443         char modes_add[COMMAND_LEN], l[16], *ptr;
 444         CLIENT *from;
 445         CHANNEL *chan;
 446         int arg_topic;
 447
 448         assert( Client != NULL );
 449         assert( Req != NULL );
 450
 451         /* Bad number of parameters? */
 452         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 453
 454         /* Compatibility kludge */
 455         if( Req->argc == 5 ) arg_topic = 4;
 456         else if( Req->argc == 3 ) arg_topic = 2;
 457         else arg_topic = -1;
 458
 459         /* Search origin */
 460         from = Client_Search( Req->prefix );
 461         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 462
 463         /* Search or create channel */
 464         chan = Channel_Search( Req->argv[0] );
 465         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 466         if( ! chan ) return CONNECTED;
 467
 468         if( Req->argv[1][0] == '+' )
 469         {
 470                 ptr = Channel_Modes( chan );
 471                 if( ! *ptr )
 472                 {
 473                         /* OK, this channel doesn't have modes jet, set the received ones: */
 474                         Channel_SetModes( chan, &Req->argv[1][1] );
 475
 476                         if( Req->argc == 5 )
 477                         {
 478                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 479                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 480                         }
 481                         else
 482                         {
 483                                 /* Delete modes which we never want to inherit */
 484                                 Channel_ModeDel( chan, 'l' );
 485                                 Channel_ModeDel( chan, 'k' );
 486                         }
 487
 488                         strcpy( modes_add, "" );
 489                         ptr = Channel_Modes( chan );
 490                         while( *ptr )
 491                         {
 492                                 if( *ptr == 'l' )
 493                                 {
 494                                         snprintf( l, sizeof( l ), " %ld", Channel_MaxUsers( chan ));
 495                                         strlcat( modes_add, l, sizeof( modes_add ));
 496                                 }
 497                                 if( *ptr == 'k' )
 498                                 {
 499                                         strlcat( modes_add, " ", sizeof( modes_add ));
 500                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 501                                 }
 502                                 ptr++;
 503                         }
 504
 505                         /* Inform members of this channel */
 506                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 507                 }
 508         }
 509         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 510
 511         if( arg_topic > 0 )
 512         {
 513                 /* We got a topic */
 514                 ptr = Channel_Topic( chan );
 515                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 516                 {
 517                         /* OK, there is no topic jet */
 518                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 519                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 520                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 521                 }
 522         }
 523
 524         /* Forward CHANINFO to other serevrs */
 525         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] );
 526         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 527         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 528
 529         return CONNECTED;
 530 } /* IRC_CHANINFO */
 531
 532
 533 /* -eof- */