2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
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.
20 static char UNUSED id[] = "$Id: channel.c,v 1.37 2002/12/14 13:21:56 alex Exp $";
34 #include "irc-write.h"
50 LOCAL CHANNEL *My_Channels;
51 LOCAL CL2CHAN *My_Cl2Chan;
54 LOCAL CL2CHAN *Get_Cl2Chan PARAMS(( CHANNEL *Chan, CLIENT *Client ));
55 LOCAL CL2CHAN *Add_Client PARAMS(( CHANNEL *Chan, CLIENT *Client ));
56 LOCAL BOOLEAN Remove_Client PARAMS(( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer ));
57 LOCAL CL2CHAN *Get_First_Cl2Chan PARAMS(( CLIENT *Client, CHANNEL *Chan ));
58 LOCAL CL2CHAN *Get_Next_Cl2Chan PARAMS(( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan ));
59 LOCAL BOOLEAN Delete_Channel PARAMS(( CHANNEL *Chan ));
71 Channel_InitPredefined( VOID )
73 /* Vordefinierte persistente Channels erzeugen */
79 for( i = 0; i < Conf_Channel_Count; i++ )
81 /* Ist ein Name konfiguriert? */
82 if( ! Conf_Channel[i].name[0] ) continue;
84 /* Gueltiger Channel-Name? */
85 if( ! Channel_IsValidName( Conf_Channel[i].name ))
87 Log( LOG_ERR, "Can't create pre-defined channel: invalid name: \"%s\"!", Conf_Channel[i].name );
91 /* Gibt es den Channel bereits? */
92 chan = Channel_Search( Conf_Channel[i].name );
95 Log( LOG_INFO, "Can't create pre-defined channel \"%s\": name already in use.", Conf_Channel[i].name );
100 chan = Channel_Create( Conf_Channel[i].name );
103 Channel_ModeAdd( chan, 'P' );
104 Channel_SetTopic( chan, Conf_Channel[i].topic );
105 c = Conf_Channel[i].modes;
106 while( *c ) Channel_ModeAdd( chan, *c++ );
107 Log( LOG_INFO, "Created pre-defined channel \"%s\".", Conf_Channel[i].name );
109 else Log( LOG_ERR, "Can't create pre-defined channel \"%s\"!", Conf_Channel[i].name );
111 } /* Channel_InitPredefined */
118 CL2CHAN *cl2chan, *cl2chan_next;
120 /* Channel-Strukturen freigeben */
129 /* Channel-Zuordnungstabelle freigeben */
130 cl2chan = My_Cl2Chan;
133 cl2chan_next = cl2chan->next;
135 cl2chan = cl2chan_next;
141 Channel_Join( CLIENT *Client, CHAR *Name )
145 assert( Client != NULL );
146 assert( Name != NULL );
148 /* Valider Channel-Name? */
149 if( ! Channel_IsValidName( Name ))
151 IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
156 chan = Channel_Search( Name );
159 /* Ist der Client bereits Mitglied? */
160 if( Get_Cl2Chan( chan, Client )) return FALSE;
164 /* Gibt es noch nicht? Dann neu anlegen: */
165 chan = Channel_Create( Name );
166 if( ! chan ) return FALSE;
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_CountForUser( CLIENT *Client )
298 /* Count number of channels a user is member of. */
303 assert( Client != NULL );
306 cl2chan = My_Cl2Chan;
309 if( cl2chan->client == Client ) count++;
310 cl2chan = cl2chan->next;
314 } /* Channel_CountForUser */
318 Channel_PCount( VOID )
320 /* Count the number of persistent (mode 'P') channels */
329 if( strchr( chan->modes, 'P' )) count++;
334 } /* Channel_PCount */
338 Channel_Name( CHANNEL *Chan )
340 assert( Chan != NULL );
346 Channel_Modes( CHANNEL *Chan )
348 assert( Chan != NULL );
350 } /* Channel_Modes */
354 Channel_First( VOID )
357 } /* Channel_First */
361 Channel_Next( CHANNEL *Chan )
363 assert( Chan != NULL );
369 Channel_Search( CHAR *Name )
371 /* Channel-Struktur suchen */
376 assert( Name != NULL );
378 search_hash = Hash( Name );
382 if( search_hash == c->hash )
384 /* lt. Hash-Wert: Treffer! */
385 if( strcasecmp( Name, c->name ) == 0 ) return c;
390 } /* Channel_Search */
394 Channel_FirstMember( CHANNEL *Chan )
396 assert( Chan != NULL );
397 return Get_First_Cl2Chan( NULL, Chan );
398 } /* Channel_FirstMember */
402 Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
404 assert( Chan != NULL );
405 assert( Cl2Chan != NULL );
406 return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
407 } /* Channel_NextMember */
411 Channel_FirstChannelOf( CLIENT *Client )
413 assert( Client != NULL );
414 return Get_First_Cl2Chan( Client, NULL );
415 } /* Channel_FirstChannelOf */
419 Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
421 assert( Client != NULL );
422 assert( Cl2Chan != NULL );
423 return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
424 } /* Channel_NextChannelOf */
428 Channel_GetClient( CL2CHAN *Cl2Chan )
430 assert( Cl2Chan != NULL );
431 return Cl2Chan->client;
432 } /* Channel_GetClient */
436 Channel_GetChannel( CL2CHAN *Cl2Chan )
438 assert( Cl2Chan != NULL );
439 return Cl2Chan->channel;
440 } /* Channel_GetChannel */
444 Channel_IsValidName( CHAR *Name )
446 /* Pruefen, ob Name als Channelname gueltig */
448 CHAR *ptr, badchars[10];
450 assert( Name != NULL );
452 if(( Name[0] != '#' ) || ( strlen( Name ) >= CHANNEL_NAME_LEN )) return FALSE;
455 strcpy( badchars, " ,:\x07" );
458 if( strchr( badchars, *ptr )) return FALSE;
463 } /* Channel_IsValidName */
467 Channel_ModeAdd( CHANNEL *Chan, CHAR Mode )
469 /* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
470 * Mode neu gesetzt wurde, FALSE, wenn der Channel den Mode
475 assert( Chan != NULL );
477 x[0] = Mode; x[1] = '\0';
478 if( ! strchr( Chan->modes, x[0] ))
480 /* Client hat den Mode noch nicht -> setzen */
481 strcat( Chan->modes, x );
485 } /* Channel_ModeAdd */
489 Channel_ModeDel( CHANNEL *Chan, CHAR Mode )
491 /* Mode soll geloescht werden. TRUE wird geliefert, wenn der
492 * Mode entfernt wurde, FALSE, wenn der Channel den Mode
493 * ueberhaupt nicht hatte. */
497 assert( Chan != NULL );
499 x[0] = Mode; x[1] = '\0';
501 p = strchr( Chan->modes, x[0] );
502 if( ! p ) return FALSE;
504 /* Client hat den Mode -> loeschen */
511 } /* Channel_ModeDel */
515 Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
517 /* Channel-User-Mode soll gesetzt werden. TRUE wird geliefert,
518 * wenn der Mode neu gesetzt wurde, FALSE, wenn der User den
519 * Channel-Mode bereits hatte. */
524 assert( Chan != NULL );
525 assert( Client != NULL );
527 cl2chan = Get_Cl2Chan( Chan, Client );
528 assert( cl2chan != NULL );
530 x[0] = Mode; x[1] = '\0';
531 if( ! strchr( cl2chan->modes, x[0] ))
533 /* Client hat den Mode noch nicht -> setzen */
534 strcat( cl2chan->modes, x );
538 } /* Channel_UserModeAdd */
542 Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
544 /* Channel-User-Mode soll geloescht werden. TRUE wird geliefert,
545 * wenn der Mode entfernt wurde, FALSE, wenn der User den Channel-Mode
546 * ueberhaupt nicht hatte. */
551 assert( Chan != NULL );
552 assert( Client != NULL );
554 cl2chan = Get_Cl2Chan( Chan, Client );
555 assert( cl2chan != NULL );
557 x[0] = Mode; x[1] = '\0';
559 p = strchr( cl2chan->modes, x[0] );
560 if( ! p ) return FALSE;
562 /* Client hat den Mode -> loeschen */
569 } /* Channel_UserModeDel */
573 Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
575 /* Channel-Modes eines Users liefern */
579 assert( Chan != NULL );
580 assert( Client != NULL );
582 cl2chan = Get_Cl2Chan( Chan, Client );
583 assert( cl2chan != NULL );
585 return cl2chan->modes;
586 } /* Channel_UserModes */
590 Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
592 /* Pruefen, ob Client Mitglied in Channel ist */
594 assert( Chan != NULL );
595 assert( Client != NULL );
597 if( Get_Cl2Chan( Chan, Client )) return TRUE;
599 } /* Channel_IsMemberOf */
603 Channel_Topic( CHANNEL *Chan )
605 assert( Chan != NULL );
607 } /* Channel_Topic */
611 Channel_SetTopic( CHANNEL *Chan, CHAR *Topic )
613 assert( Chan != NULL );
614 assert( Topic != NULL );
616 strncpy( Chan->topic, Topic, CHANNEL_TOPIC_LEN - 1 );
617 Chan->topic[CHANNEL_TOPIC_LEN - 1] = '\0';
618 } /* Channel_SetTopic */
622 Channel_SetModes( CHANNEL *Chan, CHAR *Modes )
624 assert( Chan != NULL );
625 assert( Modes != NULL );
627 strncpy( Chan->modes, Modes, CHANNEL_MODE_LEN - 1 );
628 Chan->topic[CHANNEL_MODE_LEN - 1] = '\0';
629 } /* Channel_SetModes */
634 Channel_Write( CHANNEL *Chan, CLIENT *From, CLIENT *Client, CHAR *Text )
636 BOOLEAN is_member, has_voice, is_op, ok;
638 /* Okay, Ziel ist ein Channel */
639 is_member = has_voice = is_op = FALSE;
640 if( Channel_IsMemberOf( Chan, From ))
643 if( strchr( Channel_UserModes( Chan, From ), 'v' )) has_voice = TRUE;
644 if( strchr( Channel_UserModes( Chan, From ), 'o' )) is_op = TRUE;
647 /* pruefen, ob Client in Channel schreiben darf */
649 if( strchr( Channel_Modes( Chan ), 'n' ) && ( ! is_member )) ok = FALSE;
650 if( strchr( Channel_Modes( Chan ), 'm' ) && ( ! is_op ) && ( ! has_voice )) ok = FALSE;
652 if( ! ok ) return IRC_WriteStrClient( From, ERR_CANNOTSENDTOCHAN_MSG, Client_ID( From ), Channel_Name( Chan ));
655 if( Client_Conn( From ) > NONE ) Conn_UpdateIdle( Client_Conn( From ));
656 return IRC_WriteStrChannelPrefix( Client, Chan, From, TRUE, "PRIVMSG %s :%s", Channel_Name( Chan ), Text );
657 } /* Channel_Write */
661 Channel_Create( CHAR *Name )
663 /* Neue Channel-Struktur anlegen */
667 assert( Name != NULL );
669 c = malloc( sizeof( CHANNEL ));
672 Log( LOG_EMERG, "Can't allocate memory! [New_Chan]" );
676 strncpy( c->name, Name, CHANNEL_NAME_LEN - 1 );
677 c->name[CHANNEL_NAME_LEN - 1] = '\0';
678 strcpy( c->modes, "" );
679 strcpy( c->topic, "" );
680 c->hash = Hash( c->name );
683 c->next = My_Channels;
686 Log( LOG_DEBUG, "Created new channel structure for \"%s\".", Name );
689 } /* Channel_Create */
693 Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
697 assert( Chan != NULL );
698 assert( Client != NULL );
700 cl2chan = My_Cl2Chan;
703 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
704 cl2chan = cl2chan->next;
711 Add_Client( CHANNEL *Chan, CLIENT *Client )
715 assert( Chan != NULL );
716 assert( Client != NULL );
718 /* neue CL2CHAN-Struktur anlegen */
719 cl2chan = malloc( sizeof( CL2CHAN ));
722 Log( LOG_EMERG, "Can't allocate memory! [Add_Client]" );
725 cl2chan->channel = Chan;
726 cl2chan->client = Client;
727 strcpy( cl2chan->modes, "" );
730 cl2chan->next = My_Cl2Chan;
731 My_Cl2Chan = cl2chan;
733 Log( LOG_DEBUG, "User \"%s\" joined channel \"%s\".", Client_Mask( Client ), Chan->name );
740 Remove_Client( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer )
742 CL2CHAN *cl2chan, *last_cl2chan;
745 assert( Chan != NULL );
746 assert( Client != NULL );
747 assert( Origin != NULL );
748 assert( Reason != NULL );
751 cl2chan = My_Cl2Chan;
754 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
755 last_cl2chan = cl2chan;
756 cl2chan = cl2chan->next;
758 if( ! cl2chan ) return FALSE;
760 c = cl2chan->channel;
763 /* Aus Verkettung loesen und freigeben */
764 if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
765 else My_Cl2Chan = cl2chan->next;
771 /* QUIT: andere Server wurden bereits informiert, vgl. Client_Destroy();
772 * hier also "nur" noch alle User in betroffenen Channeln infomieren */
773 assert( InformServer == FALSE );
774 IRC_WriteStrChannelPrefix( Origin, c, Origin, FALSE, "QUIT :%s", Reason );
775 Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
778 /* User wurde geKICKed: ggf. andere Server sowie alle betroffenen User
779 * im entsprechenden Channel informieren */
780 if( InformServer ) IRC_WriteStrServersPrefix( Client_NextHop( Origin ), Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
781 IRC_WriteStrChannelPrefix( Client, c, Origin, FALSE, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
782 if(( Client_Conn( Client ) > NONE ) && ( Client_Type( Client ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Client, Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
783 Log( LOG_DEBUG, "User \"%s\" has been kicked of \"%s\" by \"%s\": %s.", Client_Mask( Client ), c->name, Client_ID( Origin ), Reason );
787 if( InformServer ) IRC_WriteStrServersPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
788 IRC_WriteStrChannelPrefix( Origin, c, Client, FALSE, "PART %s :%s", c->name, Reason );
789 if(( Client_Conn( Origin ) > NONE ) && ( Client_Type( Origin ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
790 Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
793 /* Wenn Channel nun leer und nicht pre-defined: loeschen */
794 if( ! strchr( Channel_Modes( Chan ), 'P' ))
796 if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
800 } /* Remove_Client */
804 Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
806 return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
807 } /* Get_First_Cl2Chan */
811 Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
815 assert( Client != NULL || Channel != NULL );
820 if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
821 if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
822 cl2chan = cl2chan->next;
825 } /* Get_Next_Cl2Chan */
829 Delete_Channel( CHANNEL *Chan )
831 /* Channel-Struktur loeschen */
833 CHANNEL *chan, *last_chan;
839 if( chan == Chan ) break;
843 if( ! chan ) return FALSE;
845 Log( LOG_DEBUG, "Freed channel structure for \"%s\".", Chan->name );
847 /* Invite- und Ban-Lists aufraeumen */
848 Lists_DeleteChannel( chan );
850 /* Neu verketten und freigeben */
851 if( last_chan ) last_chan->next = chan->next;
852 else My_Channels = chan->next;
856 } /* Delete_Channel */