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Date:: Mon Dec 30 17:15:42 2002 UTC
Message:: - Adjusted includes for new "conn-func.h" header.
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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  * Channel management
12  */
13 
14 
15 #define __channel_c__
16 
17 
18 #include "portab.h"
19 
20 static char UNUSED id[] = "$Id: channel.c,v 1.42 2002/12/30 17:15:42 alex Exp $";
21 
22 #include "imp.h"
23 #include <assert.h>
24 #include <stdlib.h>
25 #include <string.h>
26 
27 #include "conn-func.h"
28 #include "client.h"
29 
30 #include "exp.h"
31 #include "channel.h"
32 
33 #include "imp.h"
34 #include "irc-write.h"
35 #include "resolve.h"
36 #include "conf.h"
37 #include "hash.h"
38 #include "lists.h"
39 #include "log.h"
40 #include "messages.h"
41 
42 #include "exp.h"
43 
44 
45 #define REMOVE_PART 0
46 #define REMOVE_QUIT 1
47 #define REMOVE_KICK 2
48 
49 
50 LOCAL CHANNEL *My_Channels;
51 LOCAL CL2CHAN *My_Cl2Chan;
52 
53 
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 ));
60 
61 
62 GLOBAL VOID
63 Channel_Init( VOID )
64 {
65 	My_Channels = NULL;
66 	My_Cl2Chan = NULL;
67 } /* Channel_Init */
68 
69 
70 GLOBAL VOID
71 Channel_InitPredefined( VOID )
72 {
73 	/* Vordefinierte persistente Channels erzeugen */
74 
75 	CHANNEL *chan;
76 	CHAR *c;
77 	INT i;
78 	
79 	for( i = 0; i < Conf_Channel_Count; i++ )
80 	{
81 		/* Ist ein Name konfiguriert? */
82 		if( ! Conf_Channel[i].name[0] ) continue;
83 
84 		/* Gueltiger Channel-Name? */
85 		if( ! Channel_IsValidName( Conf_Channel[i].name ))
86 		{
87 			Log( LOG_ERR, "Can't create pre-defined channel: invalid name: \"%s\"!", Conf_Channel[i].name );
88 			continue;
89 		}
90 
91 		/* Gibt es den Channel bereits? */
92 		chan = Channel_Search( Conf_Channel[i].name );
93 		if( chan )
94 		{
95 			Log( LOG_INFO, "Can't create pre-defined channel \"%s\": name already in use.", Conf_Channel[i].name );
96 			continue;
97 		}
98 		
99 		/* Channel anlegen */
100 		chan = Channel_Create( Conf_Channel[i].name );
101 		if( chan )
102 		{
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 );
108 		}
109 		else Log( LOG_ERR, "Can't create pre-defined channel \"%s\"!", Conf_Channel[i].name );
110 	}
111 } /* Channel_InitPredefined */
112 
113 
114 GLOBAL VOID
115 Channel_Exit( VOID )
116 {
117 	CHANNEL *c, *c_next;
118 	CL2CHAN *cl2chan, *cl2chan_next;
119 	
120 	/* Channel-Strukturen freigeben */
121 	c = My_Channels;
122 	while( c )
123 	{
124 		c_next = c->next;
125 		free( c );
126 		c = c_next;
127 	}
128 
129 	/* Channel-Zuordnungstabelle freigeben */
130 	cl2chan = My_Cl2Chan;
131 	while( c )
132 	{
133 		cl2chan_next = cl2chan->next;
134 		free( cl2chan );
135 		cl2chan = cl2chan_next;
136 	}
137 } /* Channel_Exit */
138 
139 
140 GLOBAL BOOLEAN
141 Channel_Join( CLIENT *Client, CHAR *Name )
142 {
143 	CHANNEL *chan;
144 	
145 	assert( Client != NULL );
146 	assert( Name != NULL );
147 
148 	/* Valider Channel-Name? */
149 	if( ! Channel_IsValidName( Name ))
150 	{
151 		IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
152 		return FALSE;
153 	}
154 
155 	/* Channel suchen */
156 	chan = Channel_Search( Name );
157 	if( chan )
158 	{
159 		/* Ist der Client bereits Mitglied? */
160 		if( Get_Cl2Chan( chan, Client )) return FALSE;
161 	}
162 	else
163 	{
164 		/* Gibt es noch nicht? Dann neu anlegen: */
165 		chan = Channel_Create( Name );
166 		if( ! chan ) return FALSE;
167 	}
168 
169 	/* User dem Channel hinzufuegen */
170 	if( ! Add_Client( chan, Client )) return FALSE;
171 	else return TRUE;
172 } /* Channel_Join */
173 
174 
175 GLOBAL BOOLEAN
176 Channel_Part( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
177 {
178 	CHANNEL *chan;
179 
180 	assert( Client != NULL );
181 	assert( Name != NULL );
182 	assert( Reason != NULL );
183 
184 	/* Channel suchen */
185 	chan = Channel_Search( Name );
186 	if(( ! chan ) || ( ! Get_Cl2Chan( chan, Client )))
187 	{
188 		IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
189 		return FALSE;
190 	}
191 
192 	/* User aus Channel entfernen */
193 	if( ! Remove_Client( REMOVE_PART, chan, Client, Origin, Reason, TRUE )) return FALSE;
194 	else return TRUE;
195 } /* Channel_Part */
196 
197 
198 GLOBAL VOID
199 Channel_Kick( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
200 {
201 	CHANNEL *chan;
202 
203 	assert( Client != NULL );
204 	assert( Origin != NULL );
205 	assert( Name != NULL );
206 	assert( Reason != NULL );
207 
208 	/* Channel suchen */
209 	chan = Channel_Search( Name );
210 	if( ! chan )
211 	{
212 		IRC_WriteStrClient( Origin, ERR_NOSUCHCHANNEL_MSG, Client_ID( Origin ), Name );
213 		return;
214 	}
215 
216 	/* Ist der User Mitglied in dem Channel? */
217 	if( ! Channel_IsMemberOf( chan, Origin ))
218 	{
219 		IRC_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG, Client_ID( Origin ), Name );
220 		return;
221 	}
222 
223 	/* Ist der User Channel-Operator? */
224 	if( ! strchr( Channel_UserModes( chan, Origin ), 'o' ))
225 	{
226 		IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Name);
227 		return;
228 	}
229 
230 	/* Ist der Ziel-User Mitglied im Channel? */
231 	if( ! Channel_IsMemberOf( chan, Client ))
232 	{
233 		IRC_WriteStrClient( Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID( Origin ), Client_ID( Client ), Name );
234 		return;
235 	}
236 
237 	Remove_Client( REMOVE_KICK, chan, Client, Origin, Reason, TRUE );
238 } /* Channel_Kick */
239 
240 
241 GLOBAL VOID
242 Channel_Quit( CLIENT *Client, CHAR *Reason )
243 {
244 	CHANNEL *c, *next_c;
245 
246 	assert( Client != NULL );
247 	assert( Reason != NULL );
248 
249 	c = My_Channels;
250 	while( c )
251 	{
252 		next_c = c->next;
253 		Remove_Client( REMOVE_QUIT, c, Client, Client, Reason, FALSE );
254 		c = next_c;
255 	}
256 } /* Channel_Quit */
257 
258 
259 GLOBAL LONG
260 Channel_Count( VOID )
261 {
262 	CHANNEL *c;
263 	LONG count;
264 	
265 	count = 0;
266 	c = My_Channels;
267 	while( c )
268 	{
269 		count++;
270 		c = c->next;
271 	}
272 	return count;
273 } /* Channel_Count */
274 
275 
276 GLOBAL LONG
277 Channel_MemberCount( CHANNEL *Chan )
278 {
279 	CL2CHAN *cl2chan;
280 	LONG count;
281 
282 	assert( Chan != NULL );
283 
284 	count = 0;
285 	cl2chan = My_Cl2Chan;
286 	while( cl2chan )
287 	{
288 		if( cl2chan->channel == Chan ) count++;
289 		cl2chan = cl2chan->next;
290 	}
291 	return count;
292 } /* Channel_MemberCount */
293 
294 
295 GLOBAL INT
296 Channel_CountForUser( CLIENT *Client )
297 {
298 	/* Count number of channels a user is member of. */
299 
300 	CL2CHAN *cl2chan;
301 	INT count;
302 	
303 	assert( Client != NULL );
304 	
305 	count = 0;
306 	cl2chan = My_Cl2Chan;
307 	while( cl2chan )
308 	{
309 		if( cl2chan->client == Client ) count++;
310 		cl2chan = cl2chan->next;
311 	}
312 
313 	return count;
314 } /* Channel_CountForUser */
315 
316 
317 GLOBAL INT
318 Channel_PCount( VOID )
319 {
320 	/* Count the number of persistent (mode 'P') channels */
321 
322 	CHANNEL *chan;
323 	INT count;
324 
325 	count = 0;
326 	chan = My_Channels;
327 	while( chan )
328 	{
329 		if( strchr( chan->modes, 'P' )) count++;
330 		chan = chan->next;
331 	}
332 
333 	return count;
334 } /* Channel_PCount */
335 
336 
337 GLOBAL CHAR *
338 Channel_Name( CHANNEL *Chan )
339 {
340 	assert( Chan != NULL );
341 	return Chan->name;
342 } /* Channel_Name */
343 
344 
345 GLOBAL CHAR *
346 Channel_Modes( CHANNEL *Chan )
347 {
348 	assert( Chan != NULL );
349 	return Chan->modes;
350 } /* Channel_Modes */
351 
352 
353 GLOBAL CHAR *
354 Channel_Key( CHANNEL *Chan )
355 {
356 	assert( Chan != NULL );
357 	return Chan->key;
358 } /* Channel_Key */
359 
360 
361 GLOBAL LONG
362 Channel_MaxUsers( CHANNEL *Chan )
363 {
364 	assert( Chan != NULL );
365 	return Chan->maxusers;
366 } /* Channel_MaxUsers */
367 
368 
369 GLOBAL CHANNEL *
370 Channel_First( VOID )
371 {
372 	return My_Channels;
373 } /* Channel_First */
374 
375 
376 GLOBAL CHANNEL *
377 Channel_Next( CHANNEL *Chan )
378 {
379 	assert( Chan != NULL );
380 	return Chan->next;
381 } /* Channel_Next */
382 
383 
384 GLOBAL CHANNEL *
385 Channel_Search( CHAR *Name )
386 {
387 	/* Channel-Struktur suchen */
388 	
389 	CHANNEL *c;
390 	UINT32 search_hash;
391 
392 	assert( Name != NULL );
393 
394 	search_hash = Hash( Name );
395 	c = My_Channels;
396 	while( c )
397 	{
398 		if( search_hash == c->hash )
399 		{
400 			/* lt. Hash-Wert: Treffer! */
401 			if( strcasecmp( Name, c->name ) == 0 ) return c;
402 		}
403 		c = c->next;
404 	}
405 	return NULL;
406 } /* Channel_Search */
407 
408 
409 GLOBAL CL2CHAN *
410 Channel_FirstMember( CHANNEL *Chan )
411 {
412 	assert( Chan != NULL );
413 	return Get_First_Cl2Chan( NULL, Chan );
414 } /* Channel_FirstMember */
415 
416 
417 GLOBAL CL2CHAN *
418 Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
419 {
420 	assert( Chan != NULL );
421 	assert( Cl2Chan != NULL );
422 	return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
423 } /* Channel_NextMember */
424 
425 
426 GLOBAL CL2CHAN *
427 Channel_FirstChannelOf( CLIENT *Client )
428 {
429 	assert( Client != NULL );
430 	return Get_First_Cl2Chan( Client, NULL );
431 } /* Channel_FirstChannelOf */
432 
433 
434 GLOBAL CL2CHAN *
435 Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
436 {
437 	assert( Client != NULL );
438 	assert( Cl2Chan != NULL );
439 	return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
440 } /* Channel_NextChannelOf */
441 
442 
443 GLOBAL CLIENT *
444 Channel_GetClient( CL2CHAN *Cl2Chan )
445 {
446 	assert( Cl2Chan != NULL );
447 	return Cl2Chan->client;
448 } /* Channel_GetClient */
449 
450 
451 GLOBAL CHANNEL *
452 Channel_GetChannel( CL2CHAN *Cl2Chan )
453 {
454 	assert( Cl2Chan != NULL );
455 	return Cl2Chan->channel;
456 } /* Channel_GetChannel */
457 
458 
459 GLOBAL BOOLEAN
460 Channel_IsValidName( CHAR *Name )
461 {
462 	/* Pruefen, ob Name als Channelname gueltig */
463 
464 	CHAR *ptr, badchars[10];
465 	
466 	assert( Name != NULL );
467 
468 	if(( Name[0] != '#' ) || ( strlen( Name ) >= CHANNEL_NAME_LEN )) return FALSE;
469 
470 	ptr = Name;
471 	strcpy( badchars, " ,:\007" );
472 	while( *ptr )
473 	{
474 		if( strchr( badchars, *ptr )) return FALSE;
475 		ptr++;
476 	}
477 	
478 	return TRUE;
479 } /* Channel_IsValidName */
480 
481 
482 GLOBAL BOOLEAN
483 Channel_ModeAdd( CHANNEL *Chan, CHAR Mode )
484 {
485 	/* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
486 	 * Mode neu gesetzt wurde, FALSE, wenn der Channel den Mode
487 	 * bereits hatte. */
488 
489 	CHAR x[2];
490 
491 	assert( Chan != NULL );
492 
493 	x[0] = Mode; x[1] = '\0';
494 	if( ! strchr( Chan->modes, x[0] ))
495 	{
496 		/* Client hat den Mode noch nicht -> setzen */
497 		strlcat( Chan->modes, x, sizeof( Chan->modes ));
498 		return TRUE;
499 	}
500 	else return FALSE;
501 } /* Channel_ModeAdd */
502 
503 
504 GLOBAL BOOLEAN
505 Channel_ModeDel( CHANNEL *Chan, CHAR Mode )
506 {
507 	/* Mode soll geloescht werden. TRUE wird geliefert, wenn der
508 	 * Mode entfernt wurde, FALSE, wenn der Channel den Mode
509 	 * ueberhaupt nicht hatte. */
510 
511 	CHAR x[2], *p;
512 
513 	assert( Chan != NULL );
514 
515 	x[0] = Mode; x[1] = '\0';
516 
517 	p = strchr( Chan->modes, x[0] );
518 	if( ! p ) return FALSE;
519 
520 	/* Client hat den Mode -> loeschen */
521 	while( *p )
522 	{
523 		*p = *(p + 1);
524 		p++;
525 	}
526 	return TRUE;
527 } /* Channel_ModeDel */
528 
529 
530 GLOBAL BOOLEAN
531 Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
532 {
533 	/* Channel-User-Mode soll gesetzt werden. TRUE wird geliefert,
534 	 * wenn der Mode neu gesetzt wurde, FALSE, wenn der User den
535 	 * Channel-Mode bereits hatte. */
536 
537 	CL2CHAN *cl2chan;
538 	CHAR x[2];
539 
540 	assert( Chan != NULL );
541 	assert( Client != NULL );
542 
543 	cl2chan = Get_Cl2Chan( Chan, Client );
544 	assert( cl2chan != NULL );
545 	
546 	x[0] = Mode; x[1] = '\0';
547 	if( ! strchr( cl2chan->modes, x[0] ))
548 	{
549 		/* Client hat den Mode noch nicht -> setzen */
550 		strlcat( cl2chan->modes, x, sizeof( cl2chan->modes ));
551 		return TRUE;
552 	}
553 	else return FALSE;
554 } /* Channel_UserModeAdd */
555 
556 
557 GLOBAL BOOLEAN
558 Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
559 {
560 	/* Channel-User-Mode soll geloescht werden. TRUE wird geliefert,
561 	 * wenn der Mode entfernt wurde, FALSE, wenn der User den Channel-Mode
562 	 * ueberhaupt nicht hatte. */
563 
564 	CL2CHAN *cl2chan;
565 	CHAR x[2], *p;
566 
567 	assert( Chan != NULL );
568 	assert( Client != NULL );
569 
570 	cl2chan = Get_Cl2Chan( Chan, Client );
571 	assert( cl2chan != NULL );
572 
573 	x[0] = Mode; x[1] = '\0';
574 
575 	p = strchr( cl2chan->modes, x[0] );
576 	if( ! p ) return FALSE;
577 
578 	/* Client hat den Mode -> loeschen */
579 	while( *p )
580 	{
581 		*p = *(p + 1);
582 		p++;
583 	}
584 	return TRUE;
585 } /* Channel_UserModeDel */
586 
587 
588 GLOBAL CHAR *
589 Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
590 {
591 	/* Channel-Modes eines Users liefern */
592 	
593 	CL2CHAN *cl2chan;
594 
595 	assert( Chan != NULL );
596 	assert( Client != NULL );
597 
598 	cl2chan = Get_Cl2Chan( Chan, Client );
599 	assert( cl2chan != NULL );
600 
601 	return cl2chan->modes;
602 } /* Channel_UserModes */
603 
604 
605 GLOBAL BOOLEAN
606 Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
607 {
608 	/* Pruefen, ob Client Mitglied in Channel ist */
609 
610 	assert( Chan != NULL );
611 	assert( Client != NULL );
612 
613 	if( Get_Cl2Chan( Chan, Client )) return TRUE;
614 	else return FALSE;
615 } /* Channel_IsMemberOf */
616 
617 
618 GLOBAL CHAR *
619 Channel_Topic( CHANNEL *Chan )
620 {
621 	assert( Chan != NULL );
622 	return Chan->topic;
623 } /* Channel_Topic */
624 
625 
626 GLOBAL VOID
627 Channel_SetTopic( CHANNEL *Chan, CHAR *Topic )
628 {
629 	assert( Chan != NULL );
630 	assert( Topic != NULL );
631 	
632 	strlcpy( Chan->topic, Topic, sizeof( Chan->topic ));
633 } /* Channel_SetTopic */
634 
635 
636 GLOBAL VOID
637 Channel_SetModes( CHANNEL *Chan, CHAR *Modes )
638 {
639 	assert( Chan != NULL );
640 	assert( Modes != NULL );
641 
642 	strlcpy( Chan->modes, Modes, sizeof( Chan->modes ));
643 } /* Channel_SetModes */
644 
645 
646 GLOBAL VOID
647 Channel_SetKey( CHANNEL *Chan, CHAR *Key )
648 {
649 	assert( Chan != NULL );
650 	assert( Key != NULL );
651 
652 	strlcpy( Chan->key, Key, sizeof( Chan->key ));
653 	Log( LOG_DEBUG, "Channel %s: Key is now \"%s\".", Chan->name, Chan->key );
654 } /* Channel_SetKey */
655 
656 
657 GLOBAL VOID
658 Channel_SetMaxUsers( CHANNEL *Chan, LONG Count )
659 {
660 	assert( Chan != NULL );
661 
662 	Chan->maxusers = Count;
663 	Log( LOG_DEBUG, "Channel %s: Member limit is now %ld.", Chan->name, Chan->maxusers );
664 } /* Channel_SetMaxUsers */
665 
666 
667 GLOBAL BOOLEAN
668 Channel_Write( CHANNEL *Chan, CLIENT *From, CLIENT *Client, CHAR *Text )
669 {
670 	BOOLEAN is_member, has_voice, is_op, ok;
671 
672 	/* Okay, Ziel ist ein Channel */
673 	is_member = has_voice = is_op = FALSE;
674 	if( Channel_IsMemberOf( Chan, From ))
675 	{
676 		is_member = TRUE;
677 		if( strchr( Channel_UserModes( Chan, From ), 'v' )) has_voice = TRUE;
678 		if( strchr( Channel_UserModes( Chan, From ), 'o' )) is_op = TRUE;
679 	}
680 
681 	/* pruefen, ob Client in Channel schreiben darf */
682 	ok = TRUE;
683 	if( strchr( Channel_Modes( Chan ), 'n' ) && ( ! is_member )) ok = FALSE;
684 	if( strchr( Channel_Modes( Chan ), 'm' ) && ( ! is_op ) && ( ! has_voice )) ok = FALSE;
685 
686 	if( ! ok ) return IRC_WriteStrClient( From, ERR_CANNOTSENDTOCHAN_MSG, Client_ID( From ), Channel_Name( Chan ));
687 
688 	/* Text senden */
689 	if( Client_Conn( From ) > NONE ) Conn_UpdateIdle( Client_Conn( From ));
690 	return IRC_WriteStrChannelPrefix( Client, Chan, From, TRUE, "PRIVMSG %s :%s", Channel_Name( Chan ), Text );
691 } /* Channel_Write */
692 
693 
694 GLOBAL CHANNEL *
695 Channel_Create( CHAR *Name )
696 {
697 	/* Neue Channel-Struktur anlegen */
698 
699 	CHANNEL *c;
700 
701 	assert( Name != NULL );
702 	
703 	c = malloc( sizeof( CHANNEL ));
704 	if( ! c )
705 	{
706 		Log( LOG_EMERG, "Can't allocate memory! [New_Chan]" );
707 		return NULL;
708 	}
709 	c->next = NULL;
710 	strlcpy( c->name, Name, sizeof( c->name ));
711 	c->name[CHANNEL_NAME_LEN - 1] = '\0';
712 	strcpy( c->modes, "" );
713 	strcpy( c->topic, "" );
714 	c->hash = Hash( c->name );
715 	strcpy( c->key, "" );
716 	c->maxusers = 0;
717 
718 	/* Verketten */
719 	c->next = My_Channels;
720 	My_Channels = c;
721 	
722 	Log( LOG_DEBUG, "Created new channel structure for \"%s\".", Name );
723 	
724 	return c;
725 } /* Channel_Create */
726 
727 
728 LOCAL CL2CHAN *
729 Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
730 {
731 	CL2CHAN *cl2chan;
732 
733 	assert( Chan != NULL );
734 	assert( Client != NULL );
735 
736 	cl2chan = My_Cl2Chan;
737 	while( cl2chan )
738 	{
739 		if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
740 		cl2chan = cl2chan->next;
741 	}
742 	return NULL;
743 } /* Get_Cl2Chan */
744 
745 
746 LOCAL CL2CHAN *
747 Add_Client( CHANNEL *Chan, CLIENT *Client )
748 {
749 	CL2CHAN *cl2chan;
750 
751 	assert( Chan != NULL );
752 	assert( Client != NULL );
753 
754 	/* neue CL2CHAN-Struktur anlegen */
755 	cl2chan = malloc( sizeof( CL2CHAN ));
756 	if( ! cl2chan )
757 	{
758 		Log( LOG_EMERG, "Can't allocate memory! [Add_Client]" );
759 		return NULL;
760 	}
761 	cl2chan->channel = Chan;
762 	cl2chan->client = Client;
763 	strcpy( cl2chan->modes, "" );
764 
765 	/* Verketten */
766 	cl2chan->next = My_Cl2Chan;
767 	My_Cl2Chan = cl2chan;
768 
769 	Log( LOG_DEBUG, "User \"%s\" joined channel \"%s\".", Client_Mask( Client ), Chan->name );
770 
771 	return cl2chan;
772 } /* Add_Client */
773 
774 
775 LOCAL BOOLEAN
776 Remove_Client( INT Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN InformServer )
777 {
778 	CL2CHAN *cl2chan, *last_cl2chan;
779 	CHANNEL *c;
780 	
781 	assert( Chan != NULL );
782 	assert( Client != NULL );
783 	assert( Origin != NULL );
784 	assert( Reason != NULL );
785 
786 	last_cl2chan = NULL;
787 	cl2chan = My_Cl2Chan;
788 	while( cl2chan )
789 	{
790 		if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
791 		last_cl2chan = cl2chan;
792 		cl2chan = cl2chan->next;
793 	}
794 	if( ! cl2chan ) return FALSE;
795 
796 	c = cl2chan->channel;
797 	assert( c != NULL );
798 
799 	/* Aus Verkettung loesen und freigeben */
800 	if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
801 	else My_Cl2Chan = cl2chan->next;
802 	free( cl2chan );
803 
804 	switch( Type )
805 	{
806 		case REMOVE_QUIT:
807 			/* QUIT: andere Server wurden bereits informiert, vgl. Client_Destroy();
808 			 * hier also "nur" noch alle User in betroffenen Channeln infomieren */
809 			assert( InformServer == FALSE );
810 			IRC_WriteStrChannelPrefix( Origin, c, Origin, FALSE, "QUIT :%s", Reason );
811 			Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
812 			break;
813 		case REMOVE_KICK:
814 			/* User wurde geKICKed: ggf. andere Server sowie alle betroffenen User
815 			 * im entsprechenden Channel informieren */
816 			if( InformServer ) IRC_WriteStrServersPrefix( Client_NextHop( Origin ), Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
817 			IRC_WriteStrChannelPrefix( Client, c, Origin, FALSE, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
818 			if(( Client_Conn( Client ) > NONE ) && ( Client_Type( Client ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Client, Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason );
819 			Log( LOG_DEBUG, "User \"%s\" has been kicked of \"%s\" by \"%s\": %s.", Client_Mask( Client ), c->name, Client_ID( Origin ), Reason );
820 			break;
821 		default:
822 			/* PART */
823 			if( InformServer ) IRC_WriteStrServersPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
824 			IRC_WriteStrChannelPrefix( Origin, c, Client, FALSE, "PART %s :%s", c->name, Reason );
825 			if(( Client_Conn( Origin ) > NONE ) && ( Client_Type( Origin ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
826 			Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
827 	}
828 
829 	/* Wenn Channel nun leer und nicht pre-defined: loeschen */
830 	if( ! strchr( Channel_Modes( Chan ), 'P' ))
831 	{
832 		if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
833 	}
834 		
835 	return TRUE;
836 } /* Remove_Client */
837 
838 
839 LOCAL CL2CHAN *
840 Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
841 {
842 	return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
843 } /* Get_First_Cl2Chan */
844 
845 
846 LOCAL CL2CHAN *
847 Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
848 {
849 	CL2CHAN *cl2chan;
850 
851 	assert( Client != NULL || Channel != NULL );
852 	
853 	cl2chan = Start;
854 	while( cl2chan )
855 	{
856 		if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
857 		if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
858 		cl2chan = cl2chan->next;
859 	}
860 	return NULL;
861 } /* Get_Next_Cl2Chan */
862 
863 
864 LOCAL BOOLEAN
865 Delete_Channel( CHANNEL *Chan )
866 {
867 	/* Channel-Struktur loeschen */
868 	
869 	CHANNEL *chan, *last_chan;
870 
871 	last_chan = NULL;
872 	chan = My_Channels;
873 	while( chan )
874 	{
875 		if( chan == Chan ) break;
876 		last_chan = chan;
877 		chan = chan->next;
878 	}
879 	if( ! chan ) return FALSE;
880 
881 	Log( LOG_DEBUG, "Freed channel structure for \"%s\".", Chan->name );
882 
883 	/* Invite- und Ban-Lists aufraeumen */
884 	Lists_DeleteChannel( chan );
885 
886 	/* Neu verketten und freigeben */
887 	if( last_chan ) last_chan->next = chan->next;
888 	else My_Channels = chan->next;
889 	free( chan );
890 		
891 	return TRUE;
892 } /* Delete_Channel */
893 
894 
895 /* -eof- */