1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
4  *
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.
11  *
12  * $Id: channel.c,v 1.33 2002/10/09 16:53:02 alex Exp $
13  *
14  * channel.c: Management der Channels
15  */
16 
17 
18 #define __channel_c__
19 
20 
21 #include "portab.h"
22 
23 #include "imp.h"
24 #include <assert.h>
25 #include <stdlib.h>
26 #include <string.h>
27 
28 #include "conn.h"
29 #include "client.h"
30 
31 #include "exp.h"
32 #include "channel.h"
33 
34 #include "imp.h"
35 #include "irc-write.h"
36 #include "resolve.h"
37 #include "conf.h"
38 #include "hash.h"
39 #include "lists.h"
40 #include "log.h"
41 #include "messages.h"
42 
43 #include "exp.h"
44 
45 
46 #define REMOVE_PART 0
47 #define REMOVE_QUIT 1
48 #define REMOVE_KICK 2
49 
50 
51 LOCAL CHANNEL *My_Channels;
52 LOCAL CL2CHAN *My_Cl2Chan;
53 
54 
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 ));
61 
62 
63 GLOBAL VOID
64 Channel_Init( VOID )
65 {
66 	My_Channels = NULL;
67 	My_Cl2Chan = NULL;
68 } /* Channel_Init */
69 
70 
71 GLOBAL VOID
72 Channel_InitPredefined( VOID )
73 {
74 	/* Vordefinierte persistente Channels erzeugen */
75 
76 	CHANNEL *chan;
77 	CHAR *c;
78 	INT i;
79 	
80 	for( i = 0; i < Conf_Channel_Count; i++ )
81 	{
82 		/* Ist ein Name konfiguriert? */
83 		if( ! Conf_Channel[i].name[0] ) continue;
84 
85 		/* Gueltiger Channel-Name? */
86 		if( ! Channel_IsValidName( Conf_Channel[i].name ))
87 		{
88 			Log( LOG_ERR, "Can't create pre-defined channel: invalid name: \"%s\"!", Conf_Channel[i].name );
89 			continue;
90 		}
91 		
92 		/* Channel anlegen */
93 		chan = Channel_Create( Conf_Channel[i].name );
94 		if( chan )
95 		{
96 			Channel_ModeAdd( chan, 'P' );
97 			Channel_SetTopic( chan, Conf_Channel[i].topic );
98 			c = Conf_Channel[i].modes;
99 			while( *c ) Channel_ModeAdd( chan, *c++ );
100 			Log( LOG_INFO, "Created pre-defined channel \"%s\".", Conf_Channel[i].name );
101 		}
102 		else Log( LOG_ERR, "Can't create pre-defined channel \"%s\"!", Conf_Channel[i].name );
103 	}
104 } /* Channel_InitPredefined */
105 
106 
107 GLOBAL VOID
108 Channel_Exit( VOID )
109 {
110 	CHANNEL *c, *c_next;
111 	CL2CHAN *cl2chan, *cl2chan_next;
112 	
113 	/* Channel-Strukturen freigeben */
114 	c = My_Channels;
115 	while( c )
116 	{
117 		c_next = c->next;
118 		free( c );
119 		c = c_next;
120 	}
121 
122 	/* Channel-Zuordnungstabelle freigeben */
123 	cl2chan = My_Cl2Chan;
124 	while( c )
125 	{
126 		cl2chan_next = cl2chan->next;
127 		free( cl2chan );
128 		cl2chan = cl2chan_next;
129 	}
130 } /* Channel_Exit */
131 
132 
133 GLOBAL BOOLEAN
134 Channel_Join( CLIENT *Client, CHAR *Name )
135 {
136 	CHANNEL *chan;
137 	
138 	assert( Client != NULL );
139 	assert( Name != NULL );
140 
141 	/* Valider Channel-Name? */
142 	if( ! Channel_IsValidName( Name ))
143 	{
144 		IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
145 		return FALSE;
146 	}
147 
148 	/* Channel suchen */
149 	chan = Channel_Search( Name );
150 	if( chan )
151 	{
152 		/* Ist der Client bereits Mitglied? */
153 		if( Get_Cl2Chan( chan, Client )) return FALSE;
154 	}
155 	else
156 	{
157 		/* Gibt es noch nicht? Dann neu anlegen: */
158 		chan = Channel_Create( Name );
159 		if( ! chan ) return FALSE;
160 	}
161 
162 	/* User dem Channel hinzufuegen */
163 	if( ! Add_Client( chan, Client )) return FALSE;
164 	else return TRUE;
165 } /* Channel_Join */
166 
167 
168 GLOBAL BOOLEAN
169 Channel_Part( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
170 {
171 	CHANNEL *chan;
172 
173 	assert( Client != NULL );
174 	assert( Name != NULL );
175 	assert( Reason != NULL );
176 
177 	/* Channel suchen */
178 	chan = Channel_Search( Name );
179 	if(( ! chan ) || ( ! Get_Cl2Chan( chan, Client )))
180 	{
181 		IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
182 		return FALSE;
183 	}
184 
185 	/* User aus Channel entfernen */
186 	if( ! Remove_Client( REMOVE_PART, chan, Client, Origin, Reason, TRUE )) return FALSE;
187 	else return TRUE;
188 } /* Channel_Part */
189 
190 
191 GLOBAL VOID
192 Channel_Kick( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
193 {
194 	CHANNEL *chan;
195 
196 	assert( Client != NULL );
197 	assert( Origin != NULL );
198 	assert( Name != NULL );
199 	assert( Reason != NULL );
200 
201 	/* Channel suchen */
202 	chan = Channel_Search( Name );
203 	if( ! chan )
204 	{
205 		IRC_WriteStrClient( Origin, ERR_NOSUCHCHANNEL_MSG, Client_ID( Origin ), Name );
206 		return;
207 	}
208 
209 	/* Ist der User Mitglied in dem Channel? */
210 	if( ! Channel_IsMemberOf( chan, Origin ))
211 	{
212 		IRC_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG, Client_ID( Origin ), Name );
213 		return;
214 	}
215 
216 	/* Ist der User Channel-Operator? */
217 	if( ! strchr( Channel_UserModes( chan, Origin ), 'o' ))
218 	{
219 		IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Name);
220 		return;
221 	}
222 
223 	/* Ist der Ziel-User Mitglied im Channel? */
224 	if( ! Channel_IsMemberOf( chan, Client ))
225 	{
226 		IRC_WriteStrClient( Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID( Origin ), Client_ID( Client ), Name );
227 		return;
228 	}
229 
230 	Remove_Client( REMOVE_KICK, chan, Client, Origin, Reason, TRUE );
231 } /* Channel_Kick */
232 
233 
234 GLOBAL VOID
235 Channel_Quit( CLIENT *Client, CHAR *Reason )
236 {
237 	CHANNEL *c, *next_c;
238 
239 	assert( Client != NULL );
240 	assert( Reason != NULL );
241 
242 	c = My_Channels;
243 	while( c )
244 	{
245 		next_c = c->next;
246 		Remove_Client( REMOVE_QUIT, c, Client, Client, Reason, FALSE );
247 		c = next_c;
248 	}
249 } /* Channel_Quit */
250 
251 
252 GLOBAL LONG
253 Channel_Count( VOID )
254 {
255 	CHANNEL *c;
256 	LONG count;
257 	
258 	count = 0;
259 	c = My_Channels;
260 	while( c )
261 	{
262 		count++;
263 		c = c->next;
264 	}
265 	return count;
266 } /* Channel_Count */
267 
268 
269 GLOBAL LONG
270 Channel_MemberCount( CHANNEL *Chan )
271 {
272 	CL2CHAN *cl2chan;
273 	LONG count;
274 
275 	assert( Chan != NULL );
276 
277 	count = 0;
278 	cl2chan = My_Cl2Chan;
279 	while( cl2chan )
280 	{
281 		if( cl2chan->channel == Chan ) count++;
282 		cl2chan = cl2chan->next;
283 	}
284 	return count;
285 } /* Channel_MemberCount */
286 
287 
288 GLOBAL CHAR *
289 Channel_Name( CHANNEL *Chan )
290 {
291 	assert( Chan != NULL );
292 	return Chan->name;
293 } /* Channel_Name */
294 
295 
296 GLOBAL CHAR *
297 Channel_Modes( CHANNEL *Chan )
298 {
299 	assert( Chan != NULL );
300 	return Chan->modes;
301 } /* Channel_Modes */
302 
303 
304 GLOBAL CHANNEL *
305 Channel_First( VOID )
306 {
307 	return My_Channels;
308 } /* Channel_First */
309 
310 
311 GLOBAL CHANNEL *
312 Channel_Next( CHANNEL *Chan )
313 {
314 	assert( Chan != NULL );
315 	return Chan->next;
316 } /* Channel_Next */
317 
318 
319 GLOBAL CHANNEL *
320 Channel_Search( CHAR *Name )
321 {
322 	/* Channel-Struktur suchen */
323 	
324 	CHANNEL *c;
325 	UINT32 search_hash;
326 
327 	assert( Name != NULL );
328 
329 	search_hash = Hash( Name );
330 	c = My_Channels;
331 	while( c )
332 	{
333 		if( search_hash == c->hash )
334 		{
335 			/* lt. Hash-Wert: Treffer! */
336 			if( strcasecmp( Name, c->name ) == 0 ) return c;
337 		}
338 		c = c->next;
339 	}
340 	return NULL;
341 } /* Channel_Search */
342 
343 
344 GLOBAL CL2CHAN *
345 Channel_FirstMember( CHANNEL *Chan )
346 {
347 	assert( Chan != NULL );
348 	return Get_First_Cl2Chan( NULL, Chan );
349 } /* Channel_FirstMember */
350 
351 
352 GLOBAL CL2CHAN *
353 Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
354 {
355 	assert( Chan != NULL );
356 	assert( Cl2Chan != NULL );
357 	return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
358 } /* Channel_NextMember */
359 
360 
361 GLOBAL CL2CHAN *
362 Channel_FirstChannelOf( CLIENT *Client )
363 {
364 	assert( Client != NULL );
365 	return Get_First_Cl2Chan( Client, NULL );
366 } /* Channel_FirstChannelOf */
367 
368 
369 GLOBAL CL2CHAN *
370 Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
371 {
372 	assert( Client != NULL );
373 	assert( Cl2Chan != NULL );
374 	return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
375 } /* Channel_NextChannelOf */
376 
377 
378 GLOBAL CLIENT *
379 Channel_GetClient( CL2CHAN *Cl2Chan )
380 {
381 	assert( Cl2Chan != NULL );
382 	return Cl2Chan->client;
383 } /* Channel_GetClient */
384 
385 
386 GLOBAL CHANNEL *
387 Channel_GetChannel( CL2CHAN *Cl2Chan )
388 {
389 	assert( Cl2Chan != NULL );
390 	return Cl2Chan->channel;
391 } /* Channel_GetChannel */
392 
393 
394 GLOBAL BOOLEAN
395 Channel_IsValidName( CHAR *Name )
396 {
397 	/* Pruefen, ob Name als Channelname gueltig */
398 
399 	CHAR *ptr, badchars[10];
400 	
401 	assert( Name != NULL );
402 
403 	if(( Name[0] != '#' ) || ( strlen( Name ) >= CHANNEL_NAME_LEN )) return FALSE;
404 
405 	ptr = Name;
406 	strcpy( badchars, " ,:\x07" );
407 	while( *ptr )
408 	{
409 		if( strchr( badchars, *ptr )) return FALSE;
410 		ptr++;
411 	}
412 	
413 	return TRUE;
414 } /* Channel_IsValidName */
415 
416 
417 GLOBAL BOOLEAN
418 Channel_ModeAdd( CHANNEL *Chan, CHAR Mode )
419 {
420 	/* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
421 	 * Mode neu gesetzt wurde, FALSE, wenn der Channel den Mode
422 	 * bereits hatte. */
423 
424 	CHAR x[2];
425 
426 	assert( Chan != NULL );
427 
428 	x[0] = Mode; x[1] = '\0';
429 	if( ! strchr( Chan->modes, x[0] ))
430 	{
431 		/* Client hat den Mode noch nicht -> setzen */
432 		strcat( Chan->modes, x );
433 		return TRUE;
434 	}
435 	else return FALSE;
436 } /* Channel_ModeAdd */
437 
438 
439 GLOBAL BOOLEAN
440 Channel_ModeDel( CHANNEL *Chan, CHAR Mode )
441 {
442 	/* Mode soll geloescht werden. TRUE wird geliefert, wenn der
443 	 * Mode entfernt wurde, FALSE, wenn der Channel den Mode
444 	 * ueberhaupt nicht hatte. */
445 
446 	CHAR x[2], *p;
447 
448 	assert( Chan != NULL );
449 
450 	x[0] = Mode; x[1] = '\0';
451 
452 	p = strchr( Chan->modes, x[0] );
453 	if( ! p ) return FALSE;
454 
455 	/* Client hat den Mode -> loeschen */
456 	while( *p )
457 	{
458 		*p = *(p + 1);
459 		p++;
460 	}
461 	return TRUE;
462 } /* Channel_ModeDel */
463 
464 
465 GLOBAL BOOLEAN
466 Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
467 {
468 	/* Channel-User-Mode soll gesetzt werden. TRUE wird geliefert,
469 	 * wenn der Mode neu gesetzt wurde, FALSE, wenn der User den
470 	 * Channel-Mode bereits hatte. */
471 
472 	CL2CHAN *cl2chan;
473 	CHAR x[2];
474 
475 	assert( Chan != NULL );
476 	assert( Client != NULL );
477 
478 	cl2chan = Get_Cl2Chan( Chan, Client );
479 	assert( cl2chan != NULL );
480 	
481 	x[0] = Mode; x[1] = '\0';
482 	if( ! strchr( cl2chan->modes, x[0] ))
483 	{
484 		/* Client hat den Mode noch nicht -> setzen */
485 		strcat( cl2chan->modes, x );
486 		return TRUE;
487 	}
488 	else return FALSE;
489 } /* Channel_UserModeAdd */
490 
491 
492 GLOBAL BOOLEAN
493 Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
494 {
495 	/* Channel-User-Mode soll geloescht werden. TRUE wird geliefert,
496 	 * wenn der Mode entfernt wurde, FALSE, wenn der User den Channel-Mode
497 	 * ueberhaupt nicht hatte. */
498 
499 	CL2CHAN *cl2chan;
500 	CHAR x[2], *p;
501 
502 	assert( Chan != NULL );
503 	assert( Client != NULL );
504 
505 	cl2chan = Get_Cl2Chan( Chan, Client );
506 	assert( cl2chan != NULL );
507 
508 	x[0] = Mode; x[1] = '\0';
509 
510 	p = strchr( cl2chan->modes, x[0] );
511 	if( ! p ) return FALSE;
512 
513 	/* Client hat den Mode -> loeschen */
514 	while( *p )
515 	{
516 		*p = *(p + 1);
517 		p++;
518 	}
519 	return TRUE;
520 } /* Channel_UserModeDel */
521 
522 
523 GLOBAL CHAR *
524 Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
525 {
526 	/* Channel-Modes eines Users liefern */
527 	
528 	CL2CHAN *cl2chan;
529 
530 	assert( Chan != NULL );
531 	assert( Client != NULL );
532 
533 	cl2chan = Get_Cl2Chan( Chan, Client );
534 	assert( cl2chan != NULL );
535 
536 	return cl2chan->modes;
537 } /* Channel_UserModes */
538 
539 
540 GLOBAL BOOLEAN
541 Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
542 {
543 	/* Pruefen, ob Client Mitglied in Channel ist */
544 
545 	assert( Chan != NULL );
546 	assert( Client != NULL );
547 
548 	if( Get_Cl2Chan( Chan, Client )) return TRUE;
549 	else return FALSE;
550 } /* Channel_IsMemberOf */
551 
552 
553 GLOBAL CHAR *
554 Channel_Topic( CHANNEL *Chan )
555 {
556 	assert( Chan != NULL );
557 	return Chan->topic;
558 } /* Channel_Topic */
559 
560 
561 GLOBAL VOID
562 Channel_SetTopic( CHANNEL *Chan, CHAR *Topic )
563 {
564 	assert( Chan != NULL );
565 	assert( Topic != NULL );
566 	
567 	strncpy( Chan->topic, Topic, CHANNEL_TOPIC_LEN - 1 );
568 	Chan->topic[CHANNEL_TOPIC_LEN - 1] = '\0';
569 } /* Channel_SetTopic */
570 
571 
572 GLOBAL VOID
573 Channel_SetModes( CHANNEL *Chan, CHAR *Modes )
574 {
575 	assert( Chan != NULL );
576 	assert( Modes != NULL );
577 
578 	strncpy( Chan->modes, Modes, CHANNEL_MODE_LEN - 1 );
579 	Chan->topic[CHANNEL_MODE_LEN - 1] = '\0';
580 } /* Channel_SetModes */
581 
582 
583 
584 GLOBAL BOOLEAN
585 Channel_Write( CHANNEL *Chan, CLIENT *From, CLIENT *Client, CHAR *Text )
586 {
587 	BOOLEAN is_member, has_voice, is_op, ok;
588 
589 	/* Okay, Ziel ist ein Channel */
590 	is_member = has_voice = is_op = FALSE;
591 	if( Channel_IsMemberOf( Chan, From ))
592 	{
593 		is_member = TRUE;
594 		if( strchr( Channel_UserModes( Chan, From ), 'v' )) has_voice = TRUE;
595 		if( strchr( Channel_UserModes( Chan, From ), 'o' )) is_op = TRUE;
596 	}
597 
598 	/* pruefen, ob Client in Channel schreiben darf */
599 	ok = TRUE;
600 	if( strchr( Channel_Modes( Chan ), 'n' ) && ( ! is_member )) ok = FALSE;
601 	if( strchr( Channel_Modes( Chan ), 'm' ) && ( ! is_op ) && ( ! has_voice )) ok = FALSE;
602 
603 	if( ! ok ) return IRC_WriteStrClient( From, ERR_CANNOTSENDTOCHAN_MSG, Client_ID( From ), Channel_Name( Chan ));
604 
605 	/* Text senden */
606 	if( Client_Conn( From ) > NONE ) Conn_UpdateIdle( Client_Conn( From ));
607 	return IRC_WriteStrChannelPrefix( Client, Chan, From, TRUE, "PRIVMSG %s :%s", Channel_Name( Chan ), Text );
608 } /* Channel_Write */
609 
610 
611 GLOBAL CHANNEL *
612 Channel_Create( CHAR *Name )
613 {
614 	/* Neue Channel-Struktur anlegen */
615 
616 	CHANNEL *c;
617 
618 	assert( Name != NULL );
619 	
620 	c = malloc( sizeof( CHANNEL ));
621 	if( ! c )
622 	{
623 		Log( LOG_EMERG, "Can't allocate memory! [New_Chan]" );
624 		return NULL;
625 	}
626 	c->next = NULL;
627 	strncpy( c->name, Name, CHANNEL_NAME_LEN - 1 );
628 	c->name[CHANNEL_NAME_LEN - 1] = '\0';
629 	strcpy( c->modes, "" );
630 	strcpy( c->topic, "" );
631 	c->hash = Hash( c->name );
632 
633 	/* Verketten */
634 	c->next = My_Channels;
635 	My_Channels = c;
636 	
637 	Log( LOG_DEBUG, "Created new channel structure for \"%s\".", Name );
638 	
639 	return c;
640 } /* Channel_Create */
641 
642 
643 LOCAL CL2CHAN *
644 Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
645 {
646 	CL2CHAN *cl2chan;
647 
648 	assert( Chan != NULL );
649 	assert( Client != NULL );
650 
651 	cl2chan = My_Cl2Chan;
652 	while( cl2chan )
653 	{
654 		if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
655 		cl2chan = cl2chan->next;
656 	}
657 	return NULL;
658 } /* Get_Cl2Chan */
659 
660 
661 LOCAL CL2CHAN *
662 Add_Client( CHANNEL *Chan, CLIENT *Client )
663 {
664 	CL2CHAN *cl2chan;
665 
666 	assert( Chan != NULL );
667 	assert( Client != NULL );
668 
669 	/* neue CL2CHAN-Struktur anlegen */
670 	cl2chan = malloc( sizeof( CL2CHAN ));
671 	if( ! cl2chan )
672 	{
673 		Log( LOG_EMERG, "Can't allocate memory! [Add_Client]" );
674 		return NULL;
675 	}
676 	cl2chan->channel = Chan;
677 	cl2chan->client = Client;
678 	strcpy( cl2chan->modes, "" );
679 
680 	/* Verketten */
681 	cl2chan->next = My_Cl2Chan;
682 	My_Cl2Chan = cl2chan;
683 
684 	Log( LOG_DEBUG, "User \"%s\" joined channel \"%s\".", Client_Mask( Client ), Chan->name );
685 
686 	return cl2chan;
687 } /* Add_Client */
688 
689 
690 LOCAL BOOLEAN
691 Remove_Client( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer )
692 {
693 	CL2CHAN *cl2chan, *last_cl2chan;
694 	CHANNEL *c;
695 	
696 	assert( Chan != NULL );
697 	assert( Client != NULL );
698 	assert( Origin != NULL );
699 	assert( Reason != NULL );
700 
701 	last_cl2chan = NULL;
702 	cl2chan = My_Cl2Chan;
703 	while( cl2chan )
704 	{
705 		if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
706 		last_cl2chan = cl2chan;
707 		cl2chan = cl2chan->next;
708 	}
709 	if( ! cl2chan ) return FALSE;
710 
711 	c = cl2chan->channel;
712 	assert( c != NULL );
713 
714 	/* Aus Verkettung loesen und freigeben */
715 	if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
716 	else My_Cl2Chan = cl2chan->next;
717 	free( cl2chan );
718 
719 	switch( Type )
720 	{
721 		case REMOVE_QUIT:
722 			/* QUIT: andere Server wurden bereits informiert, vgl. Client_Destroy();
723 			 * hier also "nur" noch alle User in betroffenen Channeln infomieren */
724 			assert( InformServer == FALSE );
725 			IRC_WriteStrChannelPrefix( Origin, c, Origin, FALSE, "QUIT :%s", Reason );
726 			Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
727 			break;
728 		case REMOVE_KICK:
729 			/* User wurde geKICKed: ggf. andere Server sowie alle betroffenen User
730 			 * im entsprechenden Channel informieren */
731 			if( InformServer ) IRC_WriteStrServersPrefix( Client_NextHop( Origin ), Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
732 			IRC_WriteStrChannelPrefix( Client, c, Origin, FALSE, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
733 			if(( Client_Conn( Client ) > NONE ) && ( Client_Type( Client ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Client, Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
734 			Log( LOG_DEBUG, "User \"%s\" has been kicked of \"%s\" by \"%s\": %s.", Client_Mask( Client ), c->name, Client_ID( Origin ), Reason );
735 			break;
736 		default:
737 			/* PART */
738 			if( InformServer ) IRC_WriteStrServersPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
739 			IRC_WriteStrChannelPrefix( Origin, c, Client, FALSE, "PART %s :%s", c->name, Reason );
740 			if(( Client_Conn( Origin ) > NONE ) && ( Client_Type( Origin ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
741 			Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
742 	}
743 
744 	/* Wenn Channel nun leer und nicht pre-defined: loeschen */
745 	if( ! strchr( Channel_Modes( Chan ), 'P' ))
746 	{
747 		if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
748 	}
749 		
750 	return TRUE;
751 } /* Remove_Client */
752 
753 
754 LOCAL CL2CHAN *
755 Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
756 {
757 	return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
758 } /* Get_First_Cl2Chan */
759 
760 
761 LOCAL CL2CHAN *
762 Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
763 {
764 	CL2CHAN *cl2chan;
765 
766 	assert( Client != NULL || Channel != NULL );
767 	
768 	cl2chan = Start;
769 	while( cl2chan )
770 	{
771 		if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
772 		if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
773 		cl2chan = cl2chan->next;
774 	}
775 	return NULL;
776 } /* Get_Next_Cl2Chan */
777 
778 
779 LOCAL BOOLEAN
780 Delete_Channel( CHANNEL *Chan )
781 {
782 	/* Channel-Struktur loeschen */
783 	
784 	CHANNEL *chan, *last_chan;
785 
786 	last_chan = NULL;
787 	chan = My_Channels;
788 	while( chan )
789 	{
790 		if( chan == Chan ) break;
791 		last_chan = chan;
792 		chan = chan->next;
793 	}
794 	if( ! chan ) return FALSE;
795 
796 	Log( LOG_DEBUG, "Freed channel structure for \"%s\".", Chan->name );
797 
798 	/* Invite- und Ban-Lists aufraeumen */
799 	Lists_DeleteChannel( chan );
800 
801 	/* Neu verketten und freigeben */
802 	if( last_chan ) last_chan->next = chan->next;
803 	else My_Channels = chan->next;
804 	free( chan );
805 		
806 	return TRUE;
807 } /* Delete_Channel */
808 
809 
810 /* -eof- */