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 1.32 2005/09/02 15:46:49 alex 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                 Log(LOG_INFO, "channame=%s, key=%s", channame, key ? key : "-");
  79                 chan = NULL; flags = NULL;
  80
  81                 /* wird der Channel neu angelegt? */
  82                 if( Channel_Search( channame )) is_new_chan = false;
  83                 else is_new_chan = true;
  84
  85                 /* Hat ein Server Channel-User-Modes uebergeben? */
  86                 if( Client_Type( Client ) == CLIENT_SERVER )
  87                 {
  88                         /* Channel-Flags extrahieren */
  89                         flags = strchr( channame, 0x7 );
  90                         if( flags )
  91                         {
  92                                 *flags = '\0';
  93                                 flags++;
  94                         }
  95                 }
  96
  97                 /* Local client? */
  98                 if( Client_Type( Client ) == CLIENT_USER )
  99                 {
 100                         /* Test if the user has reached his maximum channel count */
 101                         if( Client_Type( Client ) == CLIENT_USER )
 102                         {
 103                                 if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
 104                                 {
 105                                         IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG, Client_ID( Client ), channame );
 106                                         return CONNECTED;
 107                                 }
 108                         }
 109
 110                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 111                         if( is_new_chan )
 112                         {
 113                                 /* Erster User im Channel: Operator-Flag setzen */
 114                                 flags = "o";
 115                         }
 116                         else
 117                         {
 118                                 /* Existierenden Channel suchen */
 119                                 chan = Channel_Search( channame );
 120                                 assert( chan != NULL );
 121
 122                                 is_banned = Lists_CheckBanned( target, chan );
 123                                 is_invited = Lists_CheckInvited( target, chan );
 124
 125                                 /* Testen, ob Client gebanned ist */
 126                                 if(( is_banned == true) &&  ( is_invited == false ))
 127                                 {
 128                                         /* Client ist gebanned (und nicht invited): */
 129                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 130
 131                                         /* Try next name, if any */
 132                                         channame = strtok( NULL, "," );
 133                                         continue;
 134                                 }
 135
 136                                 /* Ist der Channel "invite-only"? */
 137                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 138                                 {
 139                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 140                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 141
 142                                         /* Try next name, if any */
 143                                         channame = strtok( NULL, "," );
 144                                         continue;
 145                                 }
 146
 147                                 /* Is the channel protected by a key? */
 148                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 149                                 {
 150                                         /* Bad channel key! */
 151                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 152
 153                                         /* Try next name, if any */
 154                                         channame = strtok( NULL, "," );
 155                                         continue;
 156                                 }
 157
 158                                 /* Are there already too many members? */
 159                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 160                                 {
 161                                         /* Bad channel key! */
 162                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 163
 164                                         /* Try next name, if any */
 165                                         channame = strtok( NULL, "," );
 166                                         continue;
 167                                 }
 168                         }
 169                 }
 170                 else
 171                 {
 172                         /* Remote server: we don't need to know whether the
 173                          * client is invited or not, but we have to make sure
 174                          * that the "one shot" entries (generated by INVITE
 175                          * commands) in this list become deleted when a user
 176                          * joins a channel this way. */
 177                         chan = Channel_Search( channame );
 178                         if( chan != NULL ) (void)Lists_CheckInvited( target, chan );
 179                 }
 180
 181                 /* Channel joinen (und ggf. anlegen) */
 182                 if( ! Channel_Join( target, channame ))
 183                 {
 184                         /* naechsten Namen ermitteln */
 185                         channame = strtok( NULL, "," );
 186                         continue;
 187                 }
 188                 if( ! chan ) chan = Channel_Search( channame );
 189                 assert( chan != NULL );
 190
 191                 /* Modes setzen (wenn vorhanden) */
 192                 while( flags && *flags )
 193                 {
 194                         Channel_UserModeAdd( chan, target, *flags );
 195                         flags++;
 196                 }
 197
 198                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 199                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 200
 201                 /* Muessen Modes an andere Server gemeldet werden? */
 202                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 203                 if( modes[1] ) modes[0] = 0x7;
 204                 else modes[0] = '\0';
 205
 206                 /* An andere Server weiterleiten */
 207                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 208
 209                 /* im Channel bekannt machen */
 210                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 211                 if( modes[1] )
 212                 {
 213                         /* Modes im Channel bekannt machen */
 214                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 215                 }
 216
 217                 if( Client_Type( Client ) == CLIENT_USER )
 218                 {
 219                         /* an Client bestaetigen */
 220                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 221
 222                         /* Send topic to client, if any */
 223                         topic = Channel_Topic(chan);
 224                         if (*topic) {
 225                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 226                                         Client_ID(Client), channame, topic);
 227 #ifndef STRICT_RFC
 228                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 229                                         Client_ID(Client), channame,
 230                                         Channel_TopicWho(chan),
 231                                         Channel_TopicTime(chan));
 232 #endif
 233                         }
 234
 235                         /* Mitglieder an Client Melden */
 236                         IRC_Send_NAMES( Client, chan );
 237                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 238                 }
 239
 240                 /* next channel? */
 241                 channame = channame_ptr;
 242                 if (channame) {
 243                         channame++;
 244                         channame_ptr = strchr(channame, ',');
 245                         if (channame_ptr) *channame_ptr = '\0';
 246
 247                         if (key_ptr) {
 248                                 key = ++key_ptr;
 249                                 key_ptr = strchr(key, ',');
 250                                 if (key_ptr) *key_ptr = '\0';
 251                         }
 252                 }
 253         }
 254         return CONNECTED;
 255 } /* IRC_JOIN */
 256
 257
 258 GLOBAL bool
 259 IRC_PART( CLIENT *Client, REQUEST *Req )
 260 {
 261         CLIENT *target;
 262         char *chan;
 263
 264         assert( Client != NULL );
 265         assert( Req != NULL );
 266
 267         /* Falsche Anzahl Parameter? */
 268         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 269
 270         /* Wer ist der Absender? */
 271         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 272         else target = Client;
 273         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 274
 275         /* Channel-Namen durchgehen */
 276         chan = strtok( Req->argv[0], "," );
 277         while( chan )
 278         {
 279                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 280                 {
 281                         /* naechsten Namen ermitteln */
 282                         chan = strtok( NULL, "," );
 283                         continue;
 284                 }
 285
 286                 /* naechsten Namen ermitteln */
 287                 chan = strtok( NULL, "," );
 288         }
 289         return CONNECTED;
 290 } /* IRC_PART */
 291
 292
 293 GLOBAL bool
 294 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 295 {
 296         CHANNEL *chan;
 297         CLIENT *from;
 298         char *topic;
 299         bool r;
 300
 301         assert( Client != NULL );
 302         assert( Req != NULL );
 303
 304         /* Falsche Anzahl Parameter? */
 305         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 306
 307         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 308         else from = Client;
 309         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 310
 311         /* Welcher Channel? */
 312         chan = Channel_Search( Req->argv[0] );
 313         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 314
 315         /* Ist der User Mitglied in dem Channel? */
 316         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 317
 318         if( Req->argc == 1 )
 319         {
 320                 /* Request actual topic */
 321                 topic = Channel_Topic(chan);
 322                 if (*topic) {
 323                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 324                                 Client_ID(Client), Channel_Name(chan), topic);
 325 #ifndef STRICT_RFC
 326                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 327                                 Client_ID(Client), Channel_Name(chan),
 328                                 Channel_TopicWho(chan),
 329                                 Channel_TopicTime(chan));
 330 #endif
 331                         return r;
 332                 }
 333                 else
 334                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 335                                         Client_ID(from), Channel_Name(chan));
 336         }
 337
 338         if( strchr( Channel_Modes( chan ), 't' ))
 339         {
 340                 /* Topic Lock. Ist der User ein Channel Operator? */
 341                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 342         }
 343
 344         /* Set new topic */
 345         Channel_SetTopic(chan, from, Req->argv[1]);
 346         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 347                 Client_Mask(from), Channel_Name(chan),
 348                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 349
 350         /* im Channel bekannt machen und an Server weiterleiten */
 351         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 352         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 353
 354         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 355         else return CONNECTED;
 356 } /* IRC_TOPIC */
 357
 358
 359 /**
 360  * Handler for the IRC "LIST" command.
 361  * This implementation handles the local case as well as the forwarding of the
 362  * LIST command to other servers in the IRC network.
 363  */
 364 GLOBAL bool
 365 IRC_LIST( CLIENT *Client, REQUEST *Req )
 366 {
 367         char *pattern;
 368         CHANNEL *chan;
 369         CLIENT *from, *target;
 370
 371         assert( Client != NULL );
 372         assert( Req != NULL );
 373
 374         /* Bad number of prameters? */
 375         if( Req->argc > 2 )
 376                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 377                         Client_ID( Client ), Req->command );
 378
 379         if( Req->argc > 0 )
 380                 pattern = strtok( Req->argv[0], "," );
 381         else
 382                 pattern = "*";
 383
 384         /* Get sender from prefix, if any */
 385         if( Client_Type( Client ) == CLIENT_SERVER )
 386                 from = Client_Search( Req->prefix );
 387         else
 388                 from = Client;
 389
 390         if( ! from )
 391                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 392                                 Client_ID( Client ), Req->prefix );
 393
 394         if( Req->argc == 2 )
 395         {
 396                 /* Forward to other server? */
 397                 target = Client_Search( Req->argv[1] );
 398                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 399                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 400                                         Client_ID( Client ), Req->argv[1] );
 401
 402                 if( target != Client_ThisServer( ))
 403                 {
 404                         /* Target is indeed an other server, forward it! */
 405                         return IRC_WriteStrClientPrefix( target, from,
 406                                         "LIST %s :%s", Client_ID( from ),
 407                                         Req->argv[1] );
 408                 }
 409         }
 410
 411         while( pattern )
 412         {
 413                 /* Loop through all the channels */
 414                 chan = Channel_First( );
 415                 while( chan )
 416                 {
 417                         /* Check search pattern */
 418                         if( Match( pattern, Channel_Name( chan )))
 419                         {
 420                                 /* Gotcha! */
 421                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 422                                     Channel_IsMemberOf( chan, from ))
 423                                 {
 424                                         if( ! IRC_WriteStrClient( from,
 425                                             RPL_LIST_MSG, Client_ID( from ),
 426                                             Channel_Name( chan ),
 427                                             Channel_MemberCount( chan ),
 428                                             Channel_Topic( chan )))
 429                                                 return DISCONNECTED;
 430                                 }
 431                         }
 432                         chan = Channel_Next( chan );
 433                 }
 434
 435                 /* Get next name ... */
 436                 if( Req->argc > 0 )
 437                         pattern = strtok( NULL, "," );
 438                 else
 439                         pattern = NULL;
 440         }
 441
 442         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 443 } /* IRC_LIST */
 444
 445
 446 GLOBAL bool
 447 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 448 {
 449         char modes_add[COMMAND_LEN], l[16], *ptr;
 450         CLIENT *from;
 451         CHANNEL *chan;
 452         int arg_topic;
 453
 454         assert( Client != NULL );
 455         assert( Req != NULL );
 456
 457         /* Bad number of parameters? */
 458         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 459
 460         /* Compatibility kludge */
 461         if( Req->argc == 5 ) arg_topic = 4;
 462         else if( Req->argc == 3 ) arg_topic = 2;
 463         else arg_topic = -1;
 464
 465         /* Search origin */
 466         from = Client_Search( Req->prefix );
 467         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 468
 469         /* Search or create channel */
 470         chan = Channel_Search( Req->argv[0] );
 471         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 472         if( ! chan ) return CONNECTED;
 473
 474         if( Req->argv[1][0] == '+' )
 475         {
 476                 ptr = Channel_Modes( chan );
 477                 if( ! *ptr )
 478                 {
 479                         /* OK, this channel doesn't have modes jet, set the received ones: */
 480                         Channel_SetModes( chan, &Req->argv[1][1] );
 481
 482                         if( Req->argc == 5 )
 483                         {
 484                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 485                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 486                         }
 487                         else
 488                         {
 489                                 /* Delete modes which we never want to inherit */
 490                                 Channel_ModeDel( chan, 'l' );
 491                                 Channel_ModeDel( chan, 'k' );
 492                         }
 493
 494                         strcpy( modes_add, "" );
 495                         ptr = Channel_Modes( chan );
 496                         while( *ptr )
 497                         {
 498                                 if( *ptr == 'l' )
 499                                 {
 500                                         snprintf( l, sizeof( l ), " %ld", Channel_MaxUsers( chan ));
 501                                         strlcat( modes_add, l, sizeof( modes_add ));
 502                                 }
 503                                 if( *ptr == 'k' )
 504                                 {
 505                                         strlcat( modes_add, " ", sizeof( modes_add ));
 506                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 507                                 }
 508                                 ptr++;
 509                         }
 510
 511                         /* Inform members of this channel */
 512                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 513                 }
 514         }
 515         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 516
 517         if( arg_topic > 0 )
 518         {
 519                 /* We got a topic */
 520                 ptr = Channel_Topic( chan );
 521                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 522                 {
 523                         /* OK, there is no topic jet */
 524                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 525                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 526                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 527                 }
 528         }
 529
 530         /* Forward CHANINFO to other serevrs */
 531         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] );
 532         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 533         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 534
 535         return CONNECTED;
 536 } /* IRC_CHANINFO */
 537
 538
 539 /* -eof- */