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 1.31 2005/09/02 12:50:25 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, *key, *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 ) key = Req->argv[1];
  64         else key = NULL;
  65
  66         /* Channel-Namen durchgehen */
  67         chan = NULL;
  68         channame = strtok( Req->argv[0], "," );
  69         while( channame )
  70         {
  71                 chan = NULL; flags = NULL;
  72
  73                 /* wird der Channel neu angelegt? */
  74                 if( Channel_Search( channame )) is_new_chan = false;
  75                 else is_new_chan = true;
  76
  77                 /* Hat ein Server Channel-User-Modes uebergeben? */
  78                 if( Client_Type( Client ) == CLIENT_SERVER )
  79                 {
  80                         /* Channel-Flags extrahieren */
  81                         flags = strchr( channame, 0x7 );
  82                         if( flags )
  83                         {
  84                                 *flags = '\0';
  85                                 flags++;
  86                         }
  87                 }
  88
  89                 /* Local client? */
  90                 if( Client_Type( Client ) == CLIENT_USER )
  91                 {
  92                         /* Test if the user has reached his maximum channel count */
  93                         if( Client_Type( Client ) == CLIENT_USER )
  94                         {
  95                                 if(( Conf_MaxJoins > 0 ) && ( Channel_CountForUser( Client ) >= Conf_MaxJoins ))
  96                                 {
  97                                         IRC_WriteStrClient( Client, ERR_TOOMANYCHANNELS_MSG, Client_ID( Client ), channame );
  98                                         return CONNECTED;
  99                                 }
 100                         }
 101
 102                         /* Existiert der Channel bereits, oder wird er im Moment neu erzeugt? */
 103                         if( is_new_chan )
 104                         {
 105                                 /* Erster User im Channel: Operator-Flag setzen */
 106                                 flags = "o";
 107                         }
 108                         else
 109                         {
 110                                 /* Existierenden Channel suchen */
 111                                 chan = Channel_Search( channame );
 112                                 assert( chan != NULL );
 113
 114                                 is_banned = Lists_CheckBanned( target, chan );
 115                                 is_invited = Lists_CheckInvited( target, chan );
 116
 117                                 /* Testen, ob Client gebanned ist */
 118                                 if(( is_banned == true) &&  ( is_invited == false ))
 119                                 {
 120                                         /* Client ist gebanned (und nicht invited): */
 121                                         IRC_WriteStrClient( Client, ERR_BANNEDFROMCHAN_MSG, Client_ID( Client ), channame );
 122
 123                                         /* Try next name, if any */
 124                                         channame = strtok( NULL, "," );
 125                                         continue;
 126                                 }
 127
 128                                 /* Ist der Channel "invite-only"? */
 129                                 if(( strchr( Channel_Modes( chan ), 'i' )) && ( is_invited == false ))
 130                                 {
 131                                         /* Channel ist "invite-only" und Client wurde nicht invited: */
 132                                         IRC_WriteStrClient( Client, ERR_INVITEONLYCHAN_MSG, Client_ID( Client ), channame );
 133
 134                                         /* Try next name, if any */
 135                                         channame = strtok( NULL, "," );
 136                                         continue;
 137                                 }
 138
 139                                 /* Is the channel protected by a key? */
 140                                 if(( strchr( Channel_Modes( chan ), 'k' )) && ( strcmp( Channel_Key( chan ), key ? key : "" ) != 0 ))
 141                                 {
 142                                         /* Bad channel key! */
 143                                         IRC_WriteStrClient( Client, ERR_BADCHANNELKEY_MSG, Client_ID( Client ), channame );
 144
 145                                         /* Try next name, if any */
 146                                         channame = strtok( NULL, "," );
 147                                         continue;
 148                                 }
 149
 150                                 /* Are there already too many members? */
 151                                 if(( strchr( Channel_Modes( chan ), 'l' )) && ( Channel_MaxUsers( chan ) <= Channel_MemberCount( chan )))
 152                                 {
 153                                         /* Bad channel key! */
 154                                         IRC_WriteStrClient( Client, ERR_CHANNELISFULL_MSG, Client_ID( Client ), channame );
 155
 156                                         /* Try next name, if any */
 157                                         channame = strtok( NULL, "," );
 158                                         continue;
 159                                 }
 160                         }
 161                 }
 162                 else
 163                 {
 164                         /* Remote server: we don't need to know whether the
 165                          * client is invited or not, but we have to make sure
 166                          * that the "one shot" entries (generated by INVITE
 167                          * commands) in this list become deleted when a user
 168                          * joins a channel this way. */
 169                         chan = Channel_Search( channame );
 170                         if( chan != NULL ) (void)Lists_CheckInvited( target, chan );
 171                 }
 172
 173                 /* Channel joinen (und ggf. anlegen) */
 174                 if( ! Channel_Join( target, channame ))
 175                 {
 176                         /* naechsten Namen ermitteln */
 177                         channame = strtok( NULL, "," );
 178                         continue;
 179                 }
 180                 if( ! chan ) chan = Channel_Search( channame );
 181                 assert( chan != NULL );
 182
 183                 /* Modes setzen (wenn vorhanden) */
 184                 while( flags && *flags )
 185                 {
 186                         Channel_UserModeAdd( chan, target, *flags );
 187                         flags++;
 188                 }
 189
 190                 /* Wenn persistenter Channel und IRC-Operator: zum Channel-OP machen */
 191                 if(( strchr( Channel_Modes( chan ), 'P' )) && ( strchr( Client_Modes( target ), 'o' ))) Channel_UserModeAdd( chan, target, 'o' );
 192
 193                 /* Muessen Modes an andere Server gemeldet werden? */
 194                 strlcpy( &modes[1], Channel_UserModes( chan, target ), sizeof( modes ) - 1 );
 195                 if( modes[1] ) modes[0] = 0x7;
 196                 else modes[0] = '\0';
 197
 198                 /* An andere Server weiterleiten */
 199                 IRC_WriteStrServersPrefix( Client, target, "JOIN :%s%s", channame, modes );
 200
 201                 /* im Channel bekannt machen */
 202                 IRC_WriteStrChannelPrefix( Client, chan, target, false, "JOIN :%s", channame );
 203                 if( modes[1] )
 204                 {
 205                         /* Modes im Channel bekannt machen */
 206                         IRC_WriteStrChannelPrefix( Client, chan, target, false, "MODE %s +%s %s", channame, &modes[1], Client_ID( target ));
 207                 }
 208
 209                 if( Client_Type( Client ) == CLIENT_USER )
 210                 {
 211                         /* an Client bestaetigen */
 212                         IRC_WriteStrClientPrefix( Client, target, "JOIN :%s", channame );
 213
 214                         /* Send topic to client, if any */
 215                         topic = Channel_Topic(chan);
 216                         if (*topic) {
 217                                 IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 218                                         Client_ID(Client), channame, topic);
 219 #ifndef STRICT_RFC
 220                                 IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 221                                         Client_ID(Client), channame,
 222                                         Channel_TopicWho(chan),
 223                                         Channel_TopicTime(chan));
 224 #endif
 225                         }
 226
 227                         /* Mitglieder an Client Melden */
 228                         IRC_Send_NAMES( Client, chan );
 229                         IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), Channel_Name( chan ));
 230                 }
 231
 232                 /* naechsten Namen ermitteln */
 233                 channame = strtok( NULL, "," );
 234         }
 235         return CONNECTED;
 236 } /* IRC_JOIN */
 237
 238
 239 GLOBAL bool
 240 IRC_PART( CLIENT *Client, REQUEST *Req )
 241 {
 242         CLIENT *target;
 243         char *chan;
 244
 245         assert( Client != NULL );
 246         assert( Req != NULL );
 247
 248         /* Falsche Anzahl Parameter? */
 249         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 250
 251         /* Wer ist der Absender? */
 252         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 253         else target = Client;
 254         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 255
 256         /* Channel-Namen durchgehen */
 257         chan = strtok( Req->argv[0], "," );
 258         while( chan )
 259         {
 260                 if( ! Channel_Part( target, Client, chan, Req->argc > 1 ? Req->argv[1] : Client_ID( target )))
 261                 {
 262                         /* naechsten Namen ermitteln */
 263                         chan = strtok( NULL, "," );
 264                         continue;
 265                 }
 266
 267                 /* naechsten Namen ermitteln */
 268                 chan = strtok( NULL, "," );
 269         }
 270         return CONNECTED;
 271 } /* IRC_PART */
 272
 273
 274 GLOBAL bool
 275 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 276 {
 277         CHANNEL *chan;
 278         CLIENT *from;
 279         char *topic;
 280         bool r;
 281
 282         assert( Client != NULL );
 283         assert( Req != NULL );
 284
 285         /* Falsche Anzahl Parameter? */
 286         if(( Req->argc < 1 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 287
 288         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 289         else from = Client;
 290         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 291
 292         /* Welcher Channel? */
 293         chan = Channel_Search( Req->argv[0] );
 294         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 295
 296         /* Ist der User Mitglied in dem Channel? */
 297         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 298
 299         if( Req->argc == 1 )
 300         {
 301                 /* Request actual topic */
 302                 topic = Channel_Topic(chan);
 303                 if (*topic) {
 304                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 305                                 Client_ID(Client), Channel_Name(chan), topic);
 306 #ifndef STRICT_RFC
 307                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 308                                 Client_ID(Client), Channel_Name(chan),
 309                                 Channel_TopicWho(chan),
 310                                 Channel_TopicTime(chan));
 311 #endif
 312                         return r;
 313                 }
 314                 else
 315                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 316                                         Client_ID(from), Channel_Name(chan));
 317         }
 318
 319         if( strchr( Channel_Modes( chan ), 't' ))
 320         {
 321                 /* Topic Lock. Ist der User ein Channel Operator? */
 322                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 323         }
 324
 325         /* Set new topic */
 326         Channel_SetTopic(chan, from, Req->argv[1]);
 327         Log(LOG_DEBUG, "User \"%s\" set topic on \"%s\": %s",
 328                 Client_Mask(from), Channel_Name(chan),
 329                 Req->argv[1][0] ? Req->argv[1] : "<none>");
 330
 331         /* im Channel bekannt machen und an Server weiterleiten */
 332         IRC_WriteStrServersPrefix( Client, from, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 333         IRC_WriteStrChannelPrefix( Client, chan, from, false, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 334
 335         if( Client_Type( Client ) == CLIENT_USER ) return IRC_WriteStrClientPrefix( Client, Client, "TOPIC %s :%s", Req->argv[0], Req->argv[1] );
 336         else return CONNECTED;
 337 } /* IRC_TOPIC */
 338
 339
 340 /**
 341  * Handler for the IRC "LIST" command.
 342  * This implementation handles the local case as well as the forwarding of the
 343  * LIST command to other servers in the IRC network.
 344  */
 345 GLOBAL bool
 346 IRC_LIST( CLIENT *Client, REQUEST *Req )
 347 {
 348         char *pattern;
 349         CHANNEL *chan;
 350         CLIENT *from, *target;
 351
 352         assert( Client != NULL );
 353         assert( Req != NULL );
 354
 355         /* Bad number of prameters? */
 356         if( Req->argc > 2 )
 357                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 358                         Client_ID( Client ), Req->command );
 359
 360         if( Req->argc > 0 )
 361                 pattern = strtok( Req->argv[0], "," );
 362         else
 363                 pattern = "*";
 364
 365         /* Get sender from prefix, if any */
 366         if( Client_Type( Client ) == CLIENT_SERVER )
 367                 from = Client_Search( Req->prefix );
 368         else
 369                 from = Client;
 370
 371         if( ! from )
 372                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 373                                 Client_ID( Client ), Req->prefix );
 374
 375         if( Req->argc == 2 )
 376         {
 377                 /* Forward to other server? */
 378                 target = Client_Search( Req->argv[1] );
 379                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 380                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 381                                         Client_ID( Client ), Req->argv[1] );
 382
 383                 if( target != Client_ThisServer( ))
 384                 {
 385                         /* Target is indeed an other server, forward it! */
 386                         return IRC_WriteStrClientPrefix( target, from,
 387                                         "LIST %s :%s", Client_ID( from ),
 388                                         Req->argv[1] );
 389                 }
 390         }
 391
 392         while( pattern )
 393         {
 394                 /* Loop through all the channels */
 395                 chan = Channel_First( );
 396                 while( chan )
 397                 {
 398                         /* Check search pattern */
 399                         if( Match( pattern, Channel_Name( chan )))
 400                         {
 401                                 /* Gotcha! */
 402                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 403                                     Channel_IsMemberOf( chan, from ))
 404                                 {
 405                                         if( ! IRC_WriteStrClient( from,
 406                                             RPL_LIST_MSG, Client_ID( from ),
 407                                             Channel_Name( chan ),
 408                                             Channel_MemberCount( chan ),
 409                                             Channel_Topic( chan )))
 410                                                 return DISCONNECTED;
 411                                 }
 412                         }
 413                         chan = Channel_Next( chan );
 414                 }
 415
 416                 /* Get next name ... */
 417                 if( Req->argc > 0 )
 418                         pattern = strtok( NULL, "," );
 419                 else
 420                         pattern = NULL;
 421         }
 422
 423         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 424 } /* IRC_LIST */
 425
 426
 427 GLOBAL bool
 428 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 429 {
 430         char modes_add[COMMAND_LEN], l[16], *ptr;
 431         CLIENT *from;
 432         CHANNEL *chan;
 433         int arg_topic;
 434
 435         assert( Client != NULL );
 436         assert( Req != NULL );
 437
 438         /* Bad number of parameters? */
 439         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 440
 441         /* Compatibility kludge */
 442         if( Req->argc == 5 ) arg_topic = 4;
 443         else if( Req->argc == 3 ) arg_topic = 2;
 444         else arg_topic = -1;
 445
 446         /* Search origin */
 447         from = Client_Search( Req->prefix );
 448         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 449
 450         /* Search or create channel */
 451         chan = Channel_Search( Req->argv[0] );
 452         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 453         if( ! chan ) return CONNECTED;
 454
 455         if( Req->argv[1][0] == '+' )
 456         {
 457                 ptr = Channel_Modes( chan );
 458                 if( ! *ptr )
 459                 {
 460                         /* OK, this channel doesn't have modes jet, set the received ones: */
 461                         Channel_SetModes( chan, &Req->argv[1][1] );
 462
 463                         if( Req->argc == 5 )
 464                         {
 465                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 466                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 467                         }
 468                         else
 469                         {
 470                                 /* Delete modes which we never want to inherit */
 471                                 Channel_ModeDel( chan, 'l' );
 472                                 Channel_ModeDel( chan, 'k' );
 473                         }
 474
 475                         strcpy( modes_add, "" );
 476                         ptr = Channel_Modes( chan );
 477                         while( *ptr )
 478                         {
 479                                 if( *ptr == 'l' )
 480                                 {
 481                                         snprintf( l, sizeof( l ), " %ld", Channel_MaxUsers( chan ));
 482                                         strlcat( modes_add, l, sizeof( modes_add ));
 483                                 }
 484                                 if( *ptr == 'k' )
 485                                 {
 486                                         strlcat( modes_add, " ", sizeof( modes_add ));
 487                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 488                                 }
 489                                 ptr++;
 490                         }
 491
 492                         /* Inform members of this channel */
 493                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 494                 }
 495         }
 496         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 497
 498         if( arg_topic > 0 )
 499         {
 500                 /* We got a topic */
 501                 ptr = Channel_Topic( chan );
 502                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 503                 {
 504                         /* OK, there is no topic jet */
 505                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 506                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 507                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 508                 }
 509         }
 510
 511         /* Forward CHANINFO to other serevrs */
 512         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] );
 513         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 514         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 515
 516         return CONNECTED;
 517 } /* IRC_CHANINFO */
 518
 519
 520 /* -eof- */