2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
5 * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
6 * der GNU General Public License (GPL), wie von der Free Software Foundation
7 * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
8 * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
9 * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
10 * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
12 * $Id: channel.c,v 1.27 2002/06/02 17:13:07 alex Exp $
14 * channel.c: Management der Channels
35 #include "irc-write.h"
50 LOCAL CHANNEL *My_Channels;
51 LOCAL CL2CHAN *My_Cl2Chan;
54 LOCAL CHANNEL *New_Chan PARAMS(( CHAR *Name ));
55 LOCAL CL2CHAN *Get_Cl2Chan PARAMS(( CHANNEL *Chan, CLIENT *Client ));
56 LOCAL CL2CHAN *Add_Client PARAMS(( CHANNEL *Chan, CLIENT *Client ));
57 LOCAL BOOLEAN Remove_Client PARAMS(( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer ));
58 LOCAL CL2CHAN *Get_First_Cl2Chan PARAMS(( CLIENT *Client, CHANNEL *Chan ));
59 LOCAL CL2CHAN *Get_Next_Cl2Chan PARAMS(( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan ));
60 LOCAL BOOLEAN Delete_Channel PARAMS(( CHANNEL *Chan ));
72 Channel_InitPredefined( VOID )
74 /* Vordefinierte persistente Channels erzeugen */
80 for( i = 0; i < Conf_Channel_Count; i++ )
82 /* Ist ein Name konfiguriert? */
83 if( ! Conf_Channel[i].name ) continue;
85 /* Gueltiger Channel-Name? */
86 if( ! Channel_IsValidName( Conf_Channel[i].name ))
88 Log( LOG_ERR, "Can't create pre-defined channel: invalid name: \"%s\"!", Conf_Channel[i].name );
93 chan = New_Chan( Conf_Channel[i].name );
97 chan->next = My_Channels;
99 Channel_ModeAdd( chan, 'P' );
100 Channel_SetTopic( chan, Conf_Channel[i].topic );
101 c = Conf_Channel[i].modes;
102 while( *c ) Channel_ModeAdd( chan, *c++ );
103 Log( LOG_INFO, "Created pre-defined channel \"%s\".", Conf_Channel[i].name );
105 else Log( LOG_ERR, "Can't create pre-defined channel \"%s\"!", Conf_Channel[i].name );
107 } /* Channel_InitPredefined */
114 CL2CHAN *cl2chan, *cl2chan_next;
116 /* Channel-Strukturen freigeben */
125 /* Channel-Zuordnungstabelle freigeben */
126 cl2chan = My_Cl2Chan;
129 cl2chan_next = cl2chan->next;
131 cl2chan = cl2chan_next;
137 Channel_Join( CLIENT *Client, CHAR *Name )
141 assert( Client != NULL );
142 assert( Name != NULL );
144 /* Valider Channel-Name? */
145 if( ! Channel_IsValidName( Name ))
147 IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
152 chan = Channel_Search( Name );
155 /* Ist der Client bereits Mitglied? */
156 if( Get_Cl2Chan( chan, Client )) return FALSE;
160 /* Gibt es noch nicht? Dann neu anlegen: */
161 chan = New_Chan( Name );
162 if( ! chan ) return FALSE;
165 chan->next = My_Channels;
169 /* User dem Channel hinzufuegen */
170 if( ! Add_Client( chan, Client )) return FALSE;
176 Channel_Part( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
180 assert( Client != NULL );
181 assert( Name != NULL );
182 assert( Reason != NULL );
185 chan = Channel_Search( Name );
186 if(( ! chan ) || ( ! Get_Cl2Chan( chan, Client )))
188 IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
192 /* User aus Channel entfernen */
193 if( ! Remove_Client( REMOVE_PART, chan, Client, Origin, Reason, TRUE )) return FALSE;
199 Channel_Kick( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
203 assert( Client != NULL );
204 assert( Origin != NULL );
205 assert( Name != NULL );
206 assert( Reason != NULL );
209 chan = Channel_Search( Name );
212 IRC_WriteStrClient( Origin, ERR_NOSUCHCHANNEL_MSG, Client_ID( Origin ), Name );
216 /* Ist der User Mitglied in dem Channel? */
217 if( ! Channel_IsMemberOf( chan, Origin ))
219 IRC_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG, Client_ID( Origin ), Name );
223 /* Ist der User Channel-Operator? */
224 if( ! strchr( Channel_UserModes( chan, Origin ), 'o' ))
226 IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Name);
230 /* Ist der Ziel-User Mitglied im Channel? */
231 if( ! Channel_IsMemberOf( chan, Client ))
233 IRC_WriteStrClient( Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID( Origin ), Client_ID( Client ), Name );
237 Remove_Client( REMOVE_KICK, chan, Client, Origin, Reason, TRUE );
242 Channel_Quit( CLIENT *Client, CHAR *Reason )
246 assert( Client != NULL );
247 assert( Reason != NULL );
253 Remove_Client( REMOVE_QUIT, c, Client, Client, Reason, FALSE );
260 Channel_Count( VOID )
273 } /* Channel_Count */
277 Channel_MemberCount( CHANNEL *Chan )
282 assert( Chan != NULL );
285 cl2chan = My_Cl2Chan;
288 if( cl2chan->channel == Chan ) count++;
289 cl2chan = cl2chan->next;
292 } /* Channel_MemberCount */
296 Channel_Name( CHANNEL *Chan )
298 assert( Chan != NULL );
304 Channel_Modes( CHANNEL *Chan )
306 assert( Chan != NULL );
308 } /* Channel_Modes */
312 Channel_First( VOID )
315 } /* Channel_First */
319 Channel_Next( CHANNEL *Chan )
321 assert( Chan != NULL );
327 Channel_Search( CHAR *Name )
329 /* Channel-Struktur suchen */
334 assert( Name != NULL );
336 search_hash = Hash( Name );
340 if( search_hash == c->hash )
342 /* lt. Hash-Wert: Treffer! */
343 if( strcasecmp( Name, c->name ) == 0 ) return c;
348 } /* Channel_Search */
352 Channel_FirstMember( CHANNEL *Chan )
354 assert( Chan != NULL );
355 return Get_First_Cl2Chan( NULL, Chan );
356 } /* Channel_FirstMember */
360 Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
362 assert( Chan != NULL );
363 assert( Cl2Chan != NULL );
364 return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
365 } /* Channel_NextMember */
369 Channel_FirstChannelOf( CLIENT *Client )
371 assert( Client != NULL );
372 return Get_First_Cl2Chan( Client, NULL );
373 } /* Channel_FirstChannelOf */
377 Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
379 assert( Client != NULL );
380 assert( Cl2Chan != NULL );
381 return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
382 } /* Channel_NextChannelOf */
386 Channel_GetClient( CL2CHAN *Cl2Chan )
388 assert( Cl2Chan != NULL );
389 return Cl2Chan->client;
390 } /* Channel_GetClient */
394 Channel_GetChannel( CL2CHAN *Cl2Chan )
396 assert( Cl2Chan != NULL );
397 return Cl2Chan->channel;
398 } /* Channel_GetChannel */
402 Channel_IsValidName( CHAR *Name )
404 /* Pruefen, ob Name als Channelname gueltig */
406 CHAR *ptr, badchars[10];
408 assert( Name != NULL );
410 if(( Name[0] != '#' ) || ( strlen( Name ) >= CHANNEL_NAME_LEN )) return FALSE;
413 strcpy( badchars, " ,:\x07" );
416 if( strchr( badchars, *ptr )) return FALSE;
421 } /* Channel_IsValidName */
425 Channel_ModeAdd( CHANNEL *Chan, CHAR Mode )
427 /* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
428 * Mode neu gesetzt wurde, FALSE, wenn der Channel den Mode
433 assert( Chan != NULL );
435 x[0] = Mode; x[1] = '\0';
436 if( ! strchr( Chan->modes, x[0] ))
438 /* Client hat den Mode noch nicht -> setzen */
439 strcat( Chan->modes, x );
443 } /* Channel_ModeAdd */
447 Channel_ModeDel( CHANNEL *Chan, CHAR Mode )
449 /* Mode soll geloescht werden. TRUE wird geliefert, wenn der
450 * Mode entfernt wurde, FALSE, wenn der Channel den Mode
451 * ueberhaupt nicht hatte. */
455 assert( Chan != NULL );
457 x[0] = Mode; x[1] = '\0';
459 p = strchr( Chan->modes, x[0] );
460 if( ! p ) return FALSE;
462 /* Client hat den Mode -> loeschen */
469 } /* Channel_ModeDel */
473 Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
475 /* Channel-User-Mode soll gesetzt werden. TRUE wird geliefert,
476 * wenn der Mode neu gesetzt wurde, FALSE, wenn der User den
477 * Channel-Mode bereits hatte. */
482 assert( Chan != NULL );
483 assert( Client != NULL );
485 cl2chan = Get_Cl2Chan( Chan, Client );
486 assert( cl2chan != NULL );
488 x[0] = Mode; x[1] = '\0';
489 if( ! strchr( cl2chan->modes, x[0] ))
491 /* Client hat den Mode noch nicht -> setzen */
492 strcat( cl2chan->modes, x );
496 } /* Channel_UserModeAdd */
500 Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
502 /* Channel-User-Mode soll geloescht werden. TRUE wird geliefert,
503 * wenn der Mode entfernt wurde, FALSE, wenn der User den Channel-Mode
504 * ueberhaupt nicht hatte. */
509 assert( Chan != NULL );
510 assert( Client != NULL );
512 cl2chan = Get_Cl2Chan( Chan, Client );
513 assert( cl2chan != NULL );
515 x[0] = Mode; x[1] = '\0';
517 p = strchr( cl2chan->modes, x[0] );
518 if( ! p ) return FALSE;
520 /* Client hat den Mode -> loeschen */
527 } /* Channel_UserModeDel */
531 Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
533 /* Channel-Modes eines Users liefern */
537 assert( Chan != NULL );
538 assert( Client != NULL );
540 cl2chan = Get_Cl2Chan( Chan, Client );
541 assert( cl2chan != NULL );
543 return cl2chan->modes;
544 } /* Channel_UserModes */
548 Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
550 /* Pruefen, ob Client Mitglied in Channel ist */
552 assert( Chan != NULL );
553 assert( Client != NULL );
555 if( Get_Cl2Chan( Chan, Client )) return TRUE;
557 } /* Channel_IsMemberOf */
561 Channel_Topic( CHANNEL *Chan )
563 assert( Chan != NULL );
565 } /* Channel_Topic */
569 Channel_SetTopic( CHANNEL *Chan, CHAR *Topic )
571 assert( Chan != NULL );
572 assert( Topic != NULL );
574 strncpy( Chan->topic, Topic, CHANNEL_TOPIC_LEN - 1 );
575 Chan->topic[CHANNEL_TOPIC_LEN - 1] = '\0';
576 } /* Channel_SetTopic */
580 Channel_Write( CHANNEL *Chan, CLIENT *From, CLIENT *Client, CHAR *Text )
582 BOOLEAN is_member, has_voice, is_op, ok;
584 /* Okay, Ziel ist ein Channel */
585 is_member = has_voice = is_op = FALSE;
586 if( Channel_IsMemberOf( Chan, From ))
589 if( strchr( Channel_UserModes( Chan, From ), 'v' )) has_voice = TRUE;
590 if( strchr( Channel_UserModes( Chan, From ), 'o' )) is_op = TRUE;
593 /* pruefen, ob Client in Channel schreiben darf */
595 if( strchr( Channel_Modes( Chan ), 'n' ) && ( ! is_member )) ok = FALSE;
596 if( strchr( Channel_Modes( Chan ), 'm' ) && ( ! is_op ) && ( ! has_voice )) ok = FALSE;
598 if( ! ok ) return IRC_WriteStrClient( From, ERR_CANNOTSENDTOCHAN_MSG, Client_ID( From ), Channel_Name( Chan ));
601 if( Client_Conn( From ) > NONE ) Conn_UpdateIdle( Client_Conn( From ));
602 return IRC_WriteStrChannelPrefix( Client, Chan, From, TRUE, "PRIVMSG %s :%s", Channel_Name( Chan ), Text );
603 } /* Channel_Write */
608 New_Chan( CHAR *Name )
610 /* Neue Channel-Struktur anlegen */
614 assert( Name != NULL );
616 c = malloc( sizeof( CHANNEL ));
619 Log( LOG_EMERG, "Can't allocate memory!" );
623 strncpy( c->name, Name, CHANNEL_NAME_LEN - 1 );
624 c->name[CHANNEL_NAME_LEN - 1] = '\0';
625 strcpy( c->modes, "" );
626 strcpy( c->topic, "" );
627 c->hash = Hash( c->name );
629 Log( LOG_DEBUG, "Created new channel structure for \"%s\".", Name );
636 Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
640 assert( Chan != NULL );
641 assert( Client != NULL );
643 cl2chan = My_Cl2Chan;
646 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
647 cl2chan = cl2chan->next;
654 Add_Client( CHANNEL *Chan, CLIENT *Client )
658 assert( Chan != NULL );
659 assert( Client != NULL );
661 /* neue CL2CHAN-Struktur anlegen */
662 cl2chan = malloc( sizeof( CL2CHAN ));
665 Log( LOG_EMERG, "Can't allocate memory!" );
668 cl2chan->channel = Chan;
669 cl2chan->client = Client;
670 strcpy( cl2chan->modes, "" );
673 cl2chan->next = My_Cl2Chan;
674 My_Cl2Chan = cl2chan;
676 Log( LOG_DEBUG, "User \"%s\" joined channel \"%s\".", Client_Mask( Client ), Chan->name );
683 Remove_Client( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer )
685 CL2CHAN *cl2chan, *last_cl2chan;
688 assert( Chan != NULL );
689 assert( Client != NULL );
690 assert( Origin != NULL );
691 assert( Reason != NULL );
694 cl2chan = My_Cl2Chan;
697 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
698 last_cl2chan = cl2chan;
699 cl2chan = cl2chan->next;
701 if( ! cl2chan ) return FALSE;
703 c = cl2chan->channel;
706 /* Aus Verkettung loesen und freigeben */
707 if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
708 else My_Cl2Chan = cl2chan->next;
714 /* QUIT: andere Server wurden bereits informiert, vgl. Client_Destroy();
715 * hier also "nur" noch alle User in betroffenen Channeln infomieren */
716 assert( InformServer == FALSE );
717 IRC_WriteStrChannelPrefix( Origin, c, Origin, FALSE, "QUIT :%s", Reason );
718 Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
721 /* User wurde geKICKed: ggf. andere Server sowie alle betroffenen User
722 * im entsprechenden Channel informieren */
723 if( InformServer ) IRC_WriteStrServersPrefix( Client_NextHop( Origin ), Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
724 IRC_WriteStrChannelPrefix( Client, c, Origin, FALSE, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
725 if(( Client_Conn( Client ) > NONE ) && ( Client_Type( Client ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Client, Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
726 Log( LOG_DEBUG, "User \"%s\" has been kicked of \"%s\" by \"%s\": %s.", Client_Mask( Client ), c->name, Client_ID( Origin ), Reason );
730 if( InformServer ) IRC_WriteStrServersPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
731 IRC_WriteStrChannelPrefix( Origin, c, Client, FALSE, "PART %s :%s", c->name, Reason );
732 if(( Client_Conn( Origin ) > NONE ) && ( Client_Type( Origin ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
733 Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
736 /* Wenn Channel nun leer und nicht pre-defined: loeschen */
737 if( ! strchr( Channel_Modes( Chan ), 'P' ))
739 if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
743 } /* Remove_Client */
747 Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
749 return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
750 } /* Get_First_Cl2Chan */
754 Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
758 assert( Client != NULL || Channel != NULL );
763 if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
764 if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
765 cl2chan = cl2chan->next;
768 } /* Get_Next_Cl2Chan */
772 Delete_Channel( CHANNEL *Chan )
774 /* Channel-Struktur loeschen */
776 CHANNEL *chan, *last_chan;
782 if( chan == Chan ) break;
786 if( ! chan ) return FALSE;
788 Log( LOG_DEBUG, "Freed channel structure for \"%s\".", Chan->name );
790 /* Neu verketten und freigeben */
791 if( last_chan ) last_chan->next = chan->next;
792 else My_Channels = chan->next;
796 } /* Delete_Channel */