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 1.43 2008/02/05 19:00:52 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 /*
  44  * RFC 2812, (3.2.1 Join message Command):
  45  *  Note that this message
  46  *  accepts a special argument ("0"), which is a special request to leave all
  47  *  channels the user is currently a member of. The server will process this
  48  *  message as if the user had sent a PART command (See Section 3.2.2) for
  49  *  each channel he is a member of.
  50  */
  51 static bool
  52 part_from_all_channels(CLIENT* client, CLIENT *target)
  53 {
  54         CL2CHAN *cl2chan;
  55         CHANNEL *chan;
  56
  57         while ((cl2chan = Channel_FirstChannelOf(target))) {
  58                 chan = Channel_GetChannel(cl2chan);
  59                 assert( chan != NULL );
  60                 Channel_Part(target, client, Channel_Name(chan), Client_ID(target));
  61         }
  62         return CONNECTED;
  63 }
  64
  65
  66 GLOBAL bool
  67 IRC_JOIN( CLIENT *Client, REQUEST *Req )
  68 {
  69         char *channame, *channame_ptr, *key, *key_ptr, *flags, *topic, modes[8];
  70         bool is_new_chan, is_invited, is_banned;
  71         CLIENT *target;
  72         CHANNEL *chan;
  73
  74         assert( Client != NULL );
  75         assert( Req != NULL );
  76
  77         /* Bad number of arguments? */
  78         if (Req->argc < 1 || Req->argc > 2)
  79                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  80                                           Client_ID(Client), Req->command);
  81
  82         /* Who is the sender? */
  83         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
  84         else target = Client;
  85         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  86
  87         /* Is argument "0"? */
  88         if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
  89                 return part_from_all_channels(Client, target);
  90
  91         /* Are channel keys given? */
  92         if (Req->argc > 1) {
  93                 key = Req->argv[1];
  94                 key_ptr = strchr(key, ',');
  95                 if (key_ptr) *key_ptr = '\0';
  96         }
  97         else
  98                 key = key_ptr = NULL;
  99
 100         channame = Req->argv[0];
 101         channame_ptr = strchr(channame, ',');
 102         if (channame_ptr) *channame_ptr = '\0';
 103
 104         /* Channel-Namen durchgehen */
 105         while (channame)
 106         {
 107                 chan = NULL; flags = NULL;
 108
 109                 /* wird der Channel neu angelegt? */
 110                 if( Channel_Search( channame )) {
 111                         is_new_chan = false;
 112                 } else {
 113                         if (Conf_PredefChannelsOnly) { /* this server does not allow creation of channels */
 114                                 IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 115                                 /* Try next name, if any */
 116                                 channame = strchr(channame, ',');
 117                                 continue;
 118                         }
 119                         is_new_chan = true;
 120                 }
 121
 122                 /* Hat ein Server Channel-User-Modes uebergeben? */
 123                 if( Client_Type( Client ) == CLIENT_SERVER )
 124                 {
 125                         /* Channel-Flags extrahieren */
 126                         flags = strchr( channame, 0x7 );
 127                         if( flags )
 128                         {
 129                                 *flags = '\0';
 130                                 flags++;
 131                         }
 132                 }
 133
 134                 /* Local client? */
 135                 if( Client_Type( Client ) == CLIENT_USER )
 136                 {
 137                         /* Test if the user has reached his maximum channel count */
 138                         if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 139                                 return IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG,
 140                                                         Client_ID( Client ), channame );
 141
 142                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 143                         if( is_new_chan )
 144                         {
 145                                 /* Erster User im Channel: Operator-Flag setzen */
 146                                 flags = "o";
 147                         }
 148                         else
 149                         {
 150                                 /* Existierenden Channel suchen */
 151                                 chan = Channel_Search( channame );
 152                                 assert( chan != NULL );
 153
 154                                 is_banned = Lists_Check(Channel_GetListBans(chan), target );
 155                                 is_invited = Lists_Check(Channel_GetListInvites(chan), target );
 156
 157                                 /* Testen, ob Client gebanned ist */
 158                                 if(( is_banned == true) &&  ( is_invited == false ))
 159                                 {
 160                                         /* Client ist gebanned (und nicht invited): */
 161                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 162
 163                                         /* Try next name, if any */
 164                                         channame = strchr(channame, ',');
 165                                         continue;
 166                                 }
 167
 168                                 /* Ist der Channel "invite-only"? */
 169                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 170                                 {
 171                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 172                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 173
 174                                         /* Try next name, if any */
 175                                         channame = strchr(channame, ',');
 176                                         continue;
 177                                 }
 178
 179                                 /* Is the channel protected by a key? */
 180                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 181                                 {
 182                                         /* Bad channel key! */
 183                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 184
 185                                         /* Try next name, if any */
 186                                         channame = strchr(channame, ',');
 187                                         continue;
 188                                 }
 189
 190                                 /* Are there already too many members? */
 191                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 192                                 {
 193                                         /* Bad channel key! */
 194                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 195
 196                                         /* Try next name, if any */
 197                                         channame = strchr(channame, ',');
 198                                         continue;
 199                                 }
 200                         }
 201                 }
 202                 else
 203                 {
 204                         /* Remote server: we don't need to know whether the
 205                          * client is invited or not, but we have to make sure
 206                          * that the "one shot" entries (generated by INVITE
 207                          * commands) in this list become deleted when a user
 208                          * joins a channel this way. */
 209                         chan = Channel_Search( channame );
 210                         if( chan != NULL ) (void)Lists_Check(Channel_GetListInvites(chan), target);
 211                 }
 212
 213                 /* Channel joinen (und ggf. anlegen) */
 214                 if( ! Channel_Join( target, channame ))
 215                 {
 216                         /* naechsten Namen ermitteln */
 217                         channame = strchr(channame, ',');
 218                         continue;
 219                 }
 220                 if( ! chan ) chan = Channel_Search( channame );
 221                 assert( chan != NULL );
 222
 223                 /* Modes setzen (wenn vorhanden) */
 224                 while( flags && *flags )
 225                 {
 226                         Channel_UserModeAdd( chan, target, *flags );
 227                         flags++;
 228                 }
 229
 230                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 231                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 232
 233                 /* Muessen Modes an andere Server gemeldet werden? */
 234                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 235                 if( modes[1] ) modes[0] = 0x7;
 236                 else modes[0] = '\0';
 237
 238                 /* An andere Server weiterleiten */
 239                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 240
 241                 /* im Channel bekannt machen */
 242                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 243                 if( modes[1] )
 244                 {
 245                         /* Modes im Channel bekannt machen */
 246                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 247                 }
 248
 249                 if( Client_Type( Client ) == CLIENT_USER )
 250                 {
 251                         /* an Client bestaetigen */
 252                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 253
 254                         /* Send topic to client, if any */
 255                         topic = Channel_Topic(chan);
 256                         if (*topic) {
 257                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 258                                         Client_ID(Client), channame, topic);
 259 #ifndef STRICT_RFC
 260                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 261                                         Client_ID(Client), channame,
 262                                         Channel_TopicWho(chan),
 263                                         Channel_TopicTime(chan));
 264 #endif
 265                         }
 266
 267                         /* Mitglieder an Client Melden */
 268                         IRC_Send_NAMES( Client, chan );
 269                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 270                 }
 271
 272                 /* next channel? */
 273                 channame = channame_ptr;
 274                 if (channame) {
 275                         channame++;
 276                         channame_ptr = strchr(channame, ',');
 277                         if (channame_ptr) *channame_ptr = '\0';
 278
 279                         if (key_ptr) {
 280                                 key = ++key_ptr;
 281                                 key_ptr = strchr(key, ',');
 282                                 if (key_ptr) *key_ptr = '\0';
 283                         }
 284                 }
 285         }
 286         return CONNECTED;
 287 } /* IRC_JOIN */
 288
 289
 290 GLOBAL bool
 291 IRC_PART( CLIENT *Client, REQUEST *Req )
 292 {
 293         CLIENT *target;
 294         char *chan;
 295
 296         assert( Client != NULL );
 297         assert( Req != NULL );
 298
 299         if (Req->argc < 1 || Req->argc > 2)
 300                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 301                                         Client_ID(Client), Req->command);
 302
 303         /* Wer ist der Absender? */
 304         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 305         else target = Client;
 306         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 307
 308         /* Channel-Namen durchgehen */
 309         chan = strtok(Req->argv[0], ",");
 310         while (chan) {
 311                 Channel_Part(target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 312
 313                 chan = strtok(NULL, ",");
 314         }
 315         return CONNECTED;
 316 } /* IRC_PART */
 317
 318
 319 GLOBAL bool
 320 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 321 {
 322         CHANNEL *chan;
 323         CLIENT *from;
 324         char *topic;
 325         bool r;
 326
 327         assert( Client != NULL );
 328         assert( Req != NULL );
 329
 330         /* Falsche Anzahl Parameter? */
 331         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 332
 333         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 334         else from = Client;
 335         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 336
 337         /* Welcher Channel? */
 338         chan = Channel_Search( Req->argv[0] );
 339         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 340
 341         /* Ist der User Mitglied in dem Channel? */
 342         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 343
 344         if( Req->argc == 1 )
 345         {
 346                 /* Request actual topic */
 347                 topic = Channel_Topic(chan);
 348                 if (*topic) {
 349                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 350                                 Client_ID(Client), Channel_Name(chan), topic);
 351 #ifndef STRICT_RFC
 352                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 353                                 Client_ID(Client), Channel_Name(chan),
 354                                 Channel_TopicWho(chan),
 355                                 Channel_TopicTime(chan));
 356 #endif
 357                         return r;
 358                 }
 359                 else
 360                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 361                                         Client_ID(from), Channel_Name(chan));
 362         }
 363
 364         if( strchr( Channel_Modes( chan ), 't' ))
 365         {
 366                 /* Topic Lock. Ist der User ein Channel Operator? */
 367                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 368         }
 369
 370         /* Set new topic */
 371         Channel_SetTopic(chan, from, Req->argv[1]);
 372         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 373                 Client_Mask(from), Channel_Name(chan),
 374                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 375
 376         /* im Channel bekannt machen und an Server weiterleiten */
 377         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 378         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 379
 380         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 381         else return CONNECTED;
 382 } /* IRC_TOPIC */
 383
 384
 385 /**
 386  * Handler for the IRC "LIST" command.
 387  * This implementation handles the local case as well as the forwarding of the
 388  * LIST command to other servers in the IRC network.
 389  */
 390 GLOBAL bool
 391 IRC_LIST( CLIENT *Client, REQUEST *Req )
 392 {
 393         char *pattern;
 394         CHANNEL *chan;
 395         CLIENT *from, *target;
 396
 397         assert( Client != NULL );
 398         assert( Req != NULL );
 399
 400         /* Bad number of prameters? */
 401         if( Req->argc > 2 )
 402                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 403                         Client_ID( Client ), Req->command );
 404
 405         if( Req->argc > 0 )
 406                 pattern = strtok( Req->argv[0], "," );
 407         else
 408                 pattern = "*";
 409
 410         /* Get sender from prefix, if any */
 411         if( Client_Type( Client ) == CLIENT_SERVER )
 412                 from = Client_Search( Req->prefix );
 413         else
 414                 from = Client;
 415
 416         if( ! from )
 417                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 418                                 Client_ID( Client ), Req->prefix );
 419
 420         if( Req->argc == 2 )
 421         {
 422                 /* Forward to other server? */
 423                 target = Client_Search( Req->argv[1] );
 424                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 425                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 426                                         Client_ID( Client ), Req->argv[1] );
 427
 428                 if( target != Client_ThisServer( ))
 429                 {
 430                         /* Target is indeed an other server, forward it! */
 431                         return IRC_WriteStrClientPrefix( target, from,
 432                                         "LIST %s :%s", Client_ID( from ),
 433                                         Req->argv[1] );
 434                 }
 435         }
 436
 437         while( pattern )
 438         {
 439                 /* Loop through all the channels */
 440                 chan = Channel_First( );
 441                 while( chan )
 442                 {
 443                         /* Check search pattern */
 444                         if( Match( pattern, Channel_Name( chan )))
 445                         {
 446                                 /* Gotcha! */
 447                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 448                                     Channel_IsMemberOf( chan, from ))
 449                                 {
 450                                         if( ! IRC_WriteStrClient( from,
 451                                             RPL_LIST_MSG, Client_ID( from ),
 452                                             Channel_Name( chan ),
 453                                             Channel_MemberCount( chan ),
 454                                             Channel_Topic( chan )))
 455                                                 return DISCONNECTED;
 456                                 }
 457                         }
 458                         chan = Channel_Next( chan );
 459                 }
 460
 461                 /* Get next name ... */
 462                 if( Req->argc > 0 )
 463                         pattern = strtok( NULL, "," );
 464                 else
 465                         pattern = NULL;
 466         }
 467
 468         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 469 } /* IRC_LIST */
 470
 471
 472 GLOBAL bool
 473 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 474 {
 475         char modes_add[COMMAND_LEN], l[16], *ptr;
 476         CLIENT *from;
 477         CHANNEL *chan;
 478         int arg_topic;
 479
 480         assert( Client != NULL );
 481         assert( Req != NULL );
 482
 483         /* Bad number of parameters? */
 484         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 485
 486         /* Compatibility kludge */
 487         if( Req->argc == 5 ) arg_topic = 4;
 488         else if( Req->argc == 3 ) arg_topic = 2;
 489         else arg_topic = -1;
 490
 491         /* Search origin */
 492         from = Client_Search( Req->prefix );
 493         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 494
 495         /* Search or create channel */
 496         chan = Channel_Search( Req->argv[0] );
 497         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 498         if( ! chan ) return CONNECTED;
 499
 500         if( Req->argv[1][0] == '+' )
 501         {
 502                 ptr = Channel_Modes( chan );
 503                 if( ! *ptr )
 504                 {
 505                         /* OK, this channel doesn't have modes jet, set the received ones: */
 506                         Channel_SetModes( chan, &Req->argv[1][1] );
 507
 508                         if( Req->argc == 5 )
 509                         {
 510                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 511                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 512                         }
 513                         else
 514                         {
 515                                 /* Delete modes which we never want to inherit */
 516                                 Channel_ModeDel( chan, 'l' );
 517                                 Channel_ModeDel( chan, 'k' );
 518                         }
 519
 520                         strcpy( modes_add, "" );
 521                         ptr = Channel_Modes( chan );
 522                         while( *ptr )
 523                         {
 524                                 if( *ptr == 'l' )
 525                                 {
 526                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 527                                         strlcat( modes_add, l, sizeof( modes_add ));
 528                                 }
 529                                 if( *ptr == 'k' )
 530                                 {
 531                                         strlcat( modes_add, " ", sizeof( modes_add ));
 532                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 533                                 }
 534                                 ptr++;
 535                         }
 536
 537                         /* Inform members of this channel */
 538                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 539                 }
 540         }
 541         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 542
 543         if( arg_topic > 0 )
 544         {
 545                 /* We got a topic */
 546                 ptr = Channel_Topic( chan );
 547                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 548                 {
 549                         /* OK, there is no topic jet */
 550                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 551                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 552                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 553                 }
 554         }
 555
 556         /* Forward CHANINFO to other serevrs */
 557         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] );
 558         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 559         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 560
 561         return CONNECTED;
 562 } /* IRC_CHANINFO */
 563
 564
 565 /* -eof- */