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Date:: Wed Oct 9 16:53:02 2002 UTC
Message:: - verwendete Datentypen aufgeraumt: beispielsweise INT32 ist nun oft ein LONG.
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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  * 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: client.c,v 1.62 2002/10/09 16:53:02 alex Exp $
13  *
14  * client.c: Management aller Clients
15  *
16  * Der Begriff "Client" ist in diesem Fall evtl. etwas verwirrend: Clients sind
17  * alle Verbindungen, die im gesamten(!) IRC-Netzwerk bekannt sind. Das sind IRC-
18  * Clients (User), andere Server und IRC-Services.
19  * Ueber welchen IRC-Server die Verbindung nun tatsaechlich in das Netzwerk her-
20  * gestellt wurde, muss der jeweiligen Struktur entnommen werden. Ist es dieser
21  * Server gewesen, so existiert eine entsprechende CONNECTION-Struktur.
22  */
23 
24 
25 #define __client_c__
26 
27 
28 #include "portab.h"
29 
30 #include "imp.h"
31 #include <assert.h>
32 #include <unistd.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <netdb.h>
37 
38 #include "conn.h"
39 
40 #include "exp.h"
41 #include "client.h"
42 
43 #include <imp.h>
44 #include "ngircd.h"
45 #include "channel.h"
46 #include "resolve.h"
47 #include "conf.h"
48 #include "hash.h"
49 #include "irc-write.h"
50 #include "log.h"
51 #include "messages.h"
52 
53 #include <exp.h>
54 
55 
56 #define GETID_LEN (CLIENT_NICK_LEN-1) + 1 + (CLIENT_USER_LEN-1) + 1 + (CLIENT_HOST_LEN-1) + 1
57 
58 
59 LOCAL CLIENT *This_Server, *My_Clients;
60 LOCAL CHAR GetID_Buffer[GETID_LEN];
61 
62 
63 LOCAL LONG Count PARAMS(( CLIENT_TYPE Type ));
64 LOCAL LONG MyCount PARAMS(( CLIENT_TYPE Type ));
65 
66 LOCAL CLIENT *New_Client_Struct PARAMS(( VOID ));
67 LOCAL VOID Generate_MyToken PARAMS(( CLIENT *Client ));
68 
69 
70 GLOBAL VOID
71 Client_Init( VOID )
72 {
73 	struct hostent *h;
74 	
75 	This_Server = New_Client_Struct( );
76 	if( ! This_Server )
77 	{
78 		Log( LOG_EMERG, "Can't allocate client structure for server! Going down." );
79 		Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE );
80 		exit( 1 );
81 	}
82 
83 	/* Client-Struktur dieses Servers */
84 	This_Server->next = NULL;
85 	This_Server->type = CLIENT_SERVER;
86 	This_Server->conn_id = NONE;
87 	This_Server->introducer = This_Server;
88 	This_Server->mytoken = 1;
89 	This_Server->hops = 0;
90 
91 	gethostname( This_Server->host, CLIENT_HOST_LEN );
92 	h = gethostbyname( This_Server->host );
93 	if( h ) strcpy( This_Server->host, h->h_name );
94 
95 	Client_SetID( This_Server, Conf_ServerName );
96 	Client_SetInfo( This_Server, Conf_ServerInfo );
97 
98 	My_Clients = This_Server;
99 } /* Client_Init */
100 
101 
102 GLOBAL VOID
103 Client_Exit( VOID )
104 {
105 	CLIENT *c, *next;
106 	INT cnt;
107 
108 	if( NGIRCd_Restart ) Client_Destroy( This_Server, "Server going down (restarting).", NULL, FALSE );
109 	else Client_Destroy( This_Server, "Server going down.", NULL, FALSE );
110 	
111 	cnt = 0;
112 	c = My_Clients;
113 	while( c )
114 	{
115 		cnt++;
116 		next = (CLIENT *)c->next;
117 		free( c );
118 		c = next;
119 	}
120 	if( cnt ) Log( LOG_INFO, "Freed %d client structure%s.", cnt, cnt == 1 ? "" : "s" );
121 } /* Client_Exit */
122 
123 
124 GLOBAL CLIENT *
125 Client_ThisServer( VOID )
126 {
127 	return This_Server;
128 } /* Client_ThisServer */
129 
130 
131 GLOBAL CLIENT *
132 Client_NewLocal( CONN_ID Idx, CHAR *Hostname, INT Type, BOOLEAN Idented )
133 {
134 	/* Neuen lokalen Client erzeugen: Wrapper-Funktion fuer Client_New(). */
135 	return Client_New( Idx, This_Server, NULL, Type, NULL, NULL, Hostname, NULL, 0, 0, NULL, Idented );
136 } /* Client_NewLocal */
137 
138 
139 GLOBAL CLIENT *
140 Client_NewRemoteServer( CLIENT *Introducer, CHAR *Hostname, CLIENT *TopServer, INT Hops, INT Token, CHAR *Info, BOOLEAN Idented )
141 {
142 	/* Neuen Remote-Client erzeugen: Wrapper-Funktion fuer Client_New (). */
143 	return Client_New( NONE, Introducer, TopServer, CLIENT_SERVER, Hostname, NULL, Hostname, Info, Hops, Token, NULL, Idented );
144 } /* Client_NewRemoteServer */
145 
146 
147 GLOBAL CLIENT *
148 Client_NewRemoteUser( CLIENT *Introducer, CHAR *Nick, INT Hops, CHAR *User, CHAR *Hostname, INT Token, CHAR *Modes, CHAR *Info, BOOLEAN Idented )
149 {
150 	/* Neuen Remote-Client erzeugen: Wrapper-Funktion fuer Client_New (). */
151 	return Client_New( NONE, Introducer, NULL, CLIENT_USER, Nick, User, Hostname, Info, Hops, Token, Modes, Idented );
152 } /* Client_NewRemoteUser */
153 
154 
155 GLOBAL CLIENT *
156 Client_New( CONN_ID Idx, CLIENT *Introducer, CLIENT *TopServer, INT Type, CHAR *ID, CHAR *User, CHAR *Hostname, CHAR *Info, INT Hops, INT Token, CHAR *Modes, BOOLEAN Idented )
157 {
158 	CLIENT *client;
159 
160 	assert( Idx >= NONE );
161 	assert( Introducer != NULL );
162 	assert( Hostname != NULL );
163 
164 	client = New_Client_Struct( );
165 	if( ! client ) return NULL;
166 
167 	/* Initialisieren */
168 	client->conn_id = Idx;
169 	client->introducer = Introducer;
170 	client->topserver = TopServer;
171 	client->type = Type;
172 	if( ID ) Client_SetID( client, ID );
173 	if( User ) Client_SetUser( client, User, Idented );
174 	if( Hostname ) Client_SetHostname( client, Hostname );
175 	if( Info ) Client_SetInfo( client, Info );
176 	client->hops = Hops;
177 	client->token = Token;
178 	if( Modes ) Client_SetModes( client, Modes );
179 	if( Type == CLIENT_SERVER ) Generate_MyToken( client );
180 
181 	/* ist der User away? */
182 	if( strchr( client->modes, 'a' )) strcpy( client->away, DEFAULT_AWAY_MSG );
183 
184 	/* Verketten */
185 	client->next = (POINTER *)My_Clients;
186 	My_Clients = client;
187 
188 	return client;
189 } /* Client_New */
190 
191 
192 GLOBAL VOID
193 Client_Destroy( CLIENT *Client, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN SendQuit )
194 {
195 	/* Client entfernen. */
196 	
197 	CLIENT *last, *c;
198 	CHAR msg[LINE_LEN], *txt;
199 
200 	assert( Client != NULL );
201 
202 	if( LogMsg ) txt = LogMsg;
203 	else txt = FwdMsg;
204 	if( ! txt ) txt = "Reason unknown.";
205 
206 	/* Netz-Split-Nachricht vorbereiten (noch nicht optimal) */
207 	if( Client->type == CLIENT_SERVER ) sprintf( msg, "%s: lost server %s", This_Server->id, Client->id );
208 
209 	last = NULL;
210 	c = My_Clients;
211 	while( c )
212 	{
213 		if(( Client->type == CLIENT_SERVER ) && ( c->introducer == Client ) && ( c != Client ))
214 		{
215 			/* der Client, der geloescht wird ist ein Server. Der Client, den wir gerade
216 			 * pruefen, ist ein Child von diesem und muss daher auch entfernt werden */
217 			Client_Destroy( c, NULL, msg, FALSE );
218 			last = NULL;
219 			c = My_Clients;
220 			continue;
221 		}
222 		if( c == Client )
223 		{
224 			/* Wir haben den Client gefunden: entfernen */
225 			if( last ) last->next = c->next;
226 			else My_Clients = (CLIENT *)c->next;
227 
228 			if( c->type == CLIENT_USER )
229 			{
230 				if( c->conn_id != NONE )
231 				{
232 					/* Ein lokaler User */
233 					Log( LOG_NOTICE, "User \"%s\" unregistered (connection %d): %s", Client_Mask( c ), c->conn_id, txt );
234 
235 					if( SendQuit )
236 					{
237 						/* Alle andere Server informieren! */
238 						if( FwdMsg ) IRC_WriteStrServersPrefix( NULL, c, "QUIT :%s", FwdMsg );
239 						else IRC_WriteStrServersPrefix( NULL, c, "QUIT :" );
240 					}
241 				}
242 				else
243 				{
244 					/* Remote User */
245 					Log( LOG_DEBUG, "User \"%s\" unregistered: %s", Client_Mask( c ), txt );
246 
247 					if( SendQuit )
248 					{
249 						/* Andere Server informieren, ausser denen, die "in
250 						 * Richtung dem liegen", auf dem der User registriert
251 						 * ist. Von denen haben wir das QUIT ja wohl bekommen. */
252 						if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "QUIT :%s", FwdMsg );
253 						else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "QUIT :" );
254 					}
255 				}
256 				Channel_Quit( c, FwdMsg ? FwdMsg : c->id );
257 			}
258 			else if( c->type == CLIENT_SERVER )
259 			{
260 				if( c != This_Server )
261 				{
262 					if( c->conn_id != NONE ) Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
263 					else Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered: %s", c->id, txt );
264 				}
265 
266 				/* andere Server informieren */
267 				if( ! NGIRCd_Quit )
268 				{
269 					if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :%s", c->id, FwdMsg );
270 					else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :", c->id );
271 				}
272 			}
273 			else
274 			{
275 				if( c->conn_id != NONE )
276 				{
277 					if( c->id[0] ) Log( LOG_NOTICE, "Client \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
278 					else Log( LOG_NOTICE, "Client unregistered (connection %d): %s", c->conn_id, txt );
279 				}
280 				else
281 				{
282 					if( c->id[0] ) Log( LOG_WARNING, "Unregistered unknown client \"%s\": %s", c->id, txt );
283 					else Log( LOG_WARNING, "Unregistered unknown client: %s", c->id, txt );
284 				}
285 			}
286 
287 			free( c );
288 			break;
289 		}
290 		last = c;
291 		c = (CLIENT *)c->next;
292 	}
293 } /* Client_Destroy */
294 
295 
296 GLOBAL VOID
297 Client_SetHostname( CLIENT *Client, CHAR *Hostname )
298 {
299 	/* Hostname eines Clients setzen */
300 	
301 	assert( Client != NULL );
302 	assert( Hostname != NULL );
303 	
304 	strncpy( Client->host, Hostname, CLIENT_HOST_LEN - 1 );
305 	Client->host[CLIENT_HOST_LEN - 1] = '\0';
306 } /* Client_SetHostname */
307 
308 
309 GLOBAL VOID
310 Client_SetID( CLIENT *Client, CHAR *ID )
311 {
312 	/* Hostname eines Clients setzen, Hash-Wert berechnen */
313 
314 	assert( Client != NULL );
315 	assert( ID != NULL );
316 	
317 	strncpy( Client->id, ID, CLIENT_ID_LEN - 1 );
318 	Client->id[CLIENT_ID_LEN - 1] = '\0';
319 
320 	/* Hash */
321 	Client->hash = Hash( Client->id );
322 } /* Client_SetID */
323 
324 
325 GLOBAL VOID
326 Client_SetUser( CLIENT *Client, CHAR *User, BOOLEAN Idented )
327 {
328 	/* Username eines Clients setzen */
329 
330 	assert( Client != NULL );
331 	assert( User != NULL );
332 	
333 	if( Idented ) strncpy( Client->user, User, CLIENT_USER_LEN - 1 );
334 	else
335 	{
336 		Client->user[0] = '~';
337 		strncpy( Client->user + 1, User, CLIENT_USER_LEN - 2 );
338 	}
339 	Client->user[CLIENT_USER_LEN - 1] = '\0';
340 } /* Client_SetUser */
341 
342 
343 GLOBAL VOID
344 Client_SetInfo( CLIENT *Client, CHAR *Info )
345 {
346 	/* Hostname eines Clients setzen */
347 
348 	assert( Client != NULL );
349 	assert( Info != NULL );
350 	
351 	strncpy( Client->info, Info, CLIENT_INFO_LEN - 1 );
352 	Client->info[CLIENT_INFO_LEN - 1] = '\0';
353 } /* Client_SetInfo */
354 
355 
356 GLOBAL VOID
357 Client_SetModes( CLIENT *Client, CHAR *Modes )
358 {
359 	/* Modes eines Clients setzen */
360 
361 	assert( Client != NULL );
362 	assert( Modes != NULL );
363 
364 	strncpy( Client->modes, Modes, CLIENT_MODE_LEN - 1 );
365 	Client->modes[CLIENT_MODE_LEN - 1] = '\0';
366 } /* Client_SetModes */
367 
368 
369 GLOBAL VOID
370 Client_SetFlags( CLIENT *Client, CHAR *Flags )
371 {
372 	/* Flags eines Clients setzen */
373 
374 	assert( Client != NULL );
375 	assert( Flags != NULL );
376 
377 	strncpy( Client->flags, Flags, CLIENT_FLAGS_LEN - 1 );
378 	Client->modes[CLIENT_FLAGS_LEN - 1] = '\0';
379 } /* Client_SetFlags */
380 
381 
382 GLOBAL VOID
383 Client_SetPassword( CLIENT *Client, CHAR *Pwd )
384 {
385 	/* Von einem Client geliefertes Passwort */
386 
387 	assert( Client != NULL );
388 	assert( Pwd != NULL );
389 	
390 	strncpy( Client->pwd, Pwd, CLIENT_PASS_LEN - 1 );
391 	Client->pwd[CLIENT_PASS_LEN - 1] = '\0';
392 } /* Client_SetPassword */
393 
394 
395 GLOBAL VOID
396 Client_SetAway( CLIENT *Client, CHAR *Txt )
397 {
398 	/* Von einem Client gelieferte AWAY-Nachricht */
399 
400 	assert( Client != NULL );
401 
402 	if( Txt )
403 	{
404 		/* Client AWAY setzen */
405 		strncpy( Client->away, Txt, CLIENT_AWAY_LEN - 1 );
406 		Client->away[CLIENT_AWAY_LEN - 1] = '\0';
407 		Client_ModeAdd( Client, 'a' );
408 		Log( LOG_DEBUG, "User \"%s\" is away: %s", Client_Mask( Client ), Txt );
409 	}
410 	else
411 	{
412 		/* AWAY loeschen */
413 		Client_ModeDel( Client, 'a' );
414 		Log( LOG_DEBUG, "User \"%s\" is no longer away.", Client_Mask( Client ));
415 	}
416 } /* Client_SetAway */
417 
418 
419 GLOBAL VOID
420 Client_SetType( CLIENT *Client, INT Type )
421 {
422 	assert( Client != NULL );
423 	Client->type = Type;
424 	if( Type == CLIENT_SERVER ) Generate_MyToken( Client );
425 } /* Client_SetType */
426 
427 
428 GLOBAL VOID
429 Client_SetHops( CLIENT *Client, INT Hops )
430 {
431 	assert( Client != NULL );
432 	Client->hops = Hops;
433 } /* Client_SetHops */
434 
435 
436 GLOBAL VOID
437 Client_SetToken( CLIENT *Client, INT Token )
438 {
439 	assert( Client != NULL );
440 	Client->token = Token;
441 } /* Client_SetToken */
442 
443 
444 GLOBAL VOID
445 Client_SetIntroducer( CLIENT *Client, CLIENT *Introducer )
446 {
447 	assert( Client != NULL );
448 	assert( Introducer != NULL );
449 	Client->introducer = Introducer;
450 } /* Client_SetIntroducer */
451 
452 
453 GLOBAL VOID
454 Client_SetOperByMe( CLIENT *Client, BOOLEAN OperByMe )
455 {
456 	assert( Client != NULL );
457 	Client->oper_by_me = OperByMe;
458 } /* Client_SetOperByMe */
459 
460 
461 GLOBAL BOOLEAN
462 Client_ModeAdd( CLIENT *Client, CHAR Mode )
463 {
464 	/* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
465 	 * Mode neu gesetzt wurde, FALSE, wenn der Client den Mode
466 	 * bereits hatte. */
467 
468 	CHAR x[2];
469 	
470 	assert( Client != NULL );
471 
472 	x[0] = Mode; x[1] = '\0';
473 	if( ! strchr( Client->modes, x[0] ))
474 	{
475 		/* Client hat den Mode noch nicht -> setzen */
476 		strcat( Client->modes, x );
477 		return TRUE;
478 	}
479 	else return FALSE;
480 } /* Client_ModeAdd */
481 
482 
483 GLOBAL BOOLEAN
484 Client_ModeDel( CLIENT *Client, CHAR Mode )
485 {
486 	/* Mode soll geloescht werden. TRUE wird geliefert, wenn der
487 	* Mode entfernt wurde, FALSE, wenn der Client den Mode
488 	* ueberhaupt nicht hatte. */
489 
490 	CHAR x[2], *p;
491 
492 	assert( Client != NULL );
493 
494 	x[0] = Mode; x[1] = '\0';
495 
496 	p = strchr( Client->modes, x[0] );
497 	if( ! p ) return FALSE;
498 
499 	/* Client hat den Mode -> loeschen */
500 	while( *p )
501 	{
502 		*p = *(p + 1);
503 		p++;
504 	}
505 	return TRUE;
506 } /* Client_ModeDel */
507 
508 
509 GLOBAL CLIENT *
510 Client_GetFromConn( CONN_ID Idx )
511 {
512 	/* Client-Struktur, die zur lokalen Verbindung Idx gehoert,
513 	 * liefern. Wird keine gefunden, so wird NULL geliefert. */
514 
515 	CLIENT *c;
516 
517 	assert( Idx >= 0 );
518 	
519 	c = My_Clients;
520 	while( c )
521 	{
522 		if( c->conn_id == Idx ) return c;
523 		c = (CLIENT *)c->next;
524 	}
525 	return NULL;
526 } /* Client_GetFromConn */
527 
528 
529 GLOBAL CLIENT *
530 Client_Search( CHAR *Nick )
531 {
532 	/* Client-Struktur, die den entsprechenden Nick hat, liefern.
533 	 * Wird keine gefunden, so wird NULL geliefert. */
534 
535 	CHAR search_id[CLIENT_ID_LEN], *ptr;
536 	CLIENT *c = NULL;
537 	UINT32 search_hash;
538 
539 	assert( Nick != NULL );
540 
541 	/* Nick kopieren und ggf. Host-Mask abschneiden */
542 	strncpy( search_id, Nick, CLIENT_ID_LEN - 1 );
543 	search_id[CLIENT_ID_LEN - 1] = '\0';
544 	ptr = strchr( search_id, '!' );
545 	if( ptr ) *ptr = '\0';
546 
547 	search_hash = Hash( search_id );
548 
549 	c = My_Clients;
550 	while( c )
551 	{
552 		if( c->hash == search_hash )
553 		{
554 			/* lt. Hash-Wert: Treffer! */
555 			if( strcasecmp( c->id, search_id ) == 0 ) return c;
556 		}
557 		c = (CLIENT *)c->next;
558 	}
559 	return NULL;
560 } /* Client_Search */
561 
562 
563 GLOBAL CLIENT *
564 Client_GetFromToken( CLIENT *Client, INT Token )
565 {
566 	/* Client-Struktur, die den entsprechenden Introducer (=Client)
567 	 * und das gegebene Token hat, liefern. Wird keine gefunden,
568 	 * so wird NULL geliefert. */
569 
570 	CLIENT *c;
571 
572 	assert( Client != NULL );
573 	assert( Token > 0 );
574 
575 	c = My_Clients;
576 	while( c )
577 	{
578 		if(( c->type == CLIENT_SERVER ) && ( c->introducer == Client ) && ( c->token == Token )) return c;
579 		c = (CLIENT *)c->next;
580 	}
581 	return NULL;
582 } /* Client_GetFromToken */
583 
584 
585 GLOBAL INT
586 Client_Type( CLIENT *Client )
587 {
588 	assert( Client != NULL );
589 	return Client->type;
590 } /* Client_Type */
591 
592 
593 GLOBAL CONN_ID
594 Client_Conn( CLIENT *Client )
595 {
596 	assert( Client != NULL );
597 	return Client->conn_id;
598 } /* Client_Conn */
599 
600 
601 GLOBAL CHAR *
602 Client_ID( CLIENT *Client )
603 {
604 	assert( Client != NULL );
605 
606 #ifdef DEBUG
607 	if( Client->type == CLIENT_USER ) assert( strlen( Client->id ) < CLIENT_NICK_LEN );
608 #endif
609 						   
610 	if( Client->id[0] ) return Client->id;
611 	else return "*";
612 } /* Client_ID */
613 
614 
615 GLOBAL CHAR *
616 Client_Info( CLIENT *Client )
617 {
618 	assert( Client != NULL );
619 	return Client->info;
620 } /* Client_Info */
621 
622 
623 GLOBAL CHAR *
624 Client_User( CLIENT *Client )
625 {
626 	assert( Client != NULL );
627 	if( Client->user[0] ) return Client->user;
628 	else return "~";
629 } /* Client_User */
630 
631 
632 GLOBAL CHAR *
633 Client_Hostname( CLIENT *Client )
634 {
635 	assert( Client != NULL );
636 	return Client->host;
637 } /* Client_Hostname */
638 
639 
640 GLOBAL CHAR *
641 Client_Password( CLIENT *Client )
642 {
643 	assert( Client != NULL );
644 	return Client->pwd;
645 } /* Client_Password */
646 
647 
648 GLOBAL CHAR *
649 Client_Modes( CLIENT *Client )
650 {
651 	assert( Client != NULL );
652 	return Client->modes;
653 } /* Client_Modes */
654 
655 
656 GLOBAL CHAR *
657 Client_Flags( CLIENT *Client )
658 {
659 	assert( Client != NULL );
660 	return Client->flags;
661 } /* Client_Flags */
662 
663 
664 GLOBAL BOOLEAN
665 Client_OperByMe( CLIENT *Client )
666 {
667 	assert( Client != NULL );
668 	return Client->oper_by_me;
669 } /* Client_OperByMe */
670 
671 
672 GLOBAL INT
673 Client_Hops( CLIENT *Client )
674 {
675 	assert( Client != NULL );
676 	return Client->hops;
677 } /* Client_Hops */
678 
679 
680 GLOBAL INT
681 Client_Token( CLIENT *Client )
682 {
683 	assert( Client != NULL );
684 	return Client->token;
685 } /* Client_Token */
686 
687 
688 GLOBAL INT
689 Client_MyToken( CLIENT *Client )
690 {
691 	assert( Client != NULL );
692 	return Client->mytoken;
693 } /* Client_MyToken */
694 
695 
696 GLOBAL CLIENT *
697 Client_NextHop( CLIENT *Client )
698 {
699 	CLIENT *c;
700 	
701 	assert( Client != NULL );
702 
703 	c = Client;
704 	while( c->introducer && ( c->introducer != c ) && ( c->introducer != This_Server )) c = c->introducer;
705 	return c;
706 } /* Client_NextHop */
707 
708 
709 GLOBAL CHAR *
710 Client_Mask( CLIENT *Client )
711 {
712 	/* Client-"ID" liefern, wie sie z.B. fuer
713 	 * Prefixe benoetigt wird. */
714 
715 	assert( Client != NULL );
716 	
717 	if( Client->type == CLIENT_SERVER ) return Client->id;
718 
719 	snprintf( GetID_Buffer, GETID_LEN, "%s!%s@%s", Client->id, Client->user, Client->host );
720 	return GetID_Buffer;
721 } /* Client_Mask */
722 
723 
724 GLOBAL CLIENT *
725 Client_Introducer( CLIENT *Client )
726 {
727 	assert( Client != NULL );
728 	return Client->introducer;
729 } /* Client_Introducer */
730 
731 
732 GLOBAL CLIENT *
733 Client_TopServer( CLIENT *Client )
734 {
735 	assert( Client != NULL );
736 	return Client->topserver;
737 } /* Client_TopServer */
738 
739 
740 GLOBAL BOOLEAN
741 Client_HasMode( CLIENT *Client, CHAR Mode )
742 {
743 	assert( Client != NULL );
744 	return strchr( Client->modes, Mode ) != NULL;
745 } /* Client_HasMode */
746 
747 
748 GLOBAL CHAR *
749 Client_Away( CLIENT *Client )
750 {
751 	/* AWAY-Text liefern */
752 
753 	assert( Client != NULL );
754 	return Client->away;
755 } /* Client_Away */
756 
757 
758 GLOBAL BOOLEAN
759 Client_CheckNick( CLIENT *Client, CHAR *Nick )
760 {
761 	/* Nick ueberpruefen */
762 
763 	assert( Client != NULL );
764 	assert( Nick != NULL );
765 	
766 	/* Nick ungueltig? */
767 	if( ! Client_IsValidNick( Nick ))
768 	{
769 		IRC_WriteStrClient( Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID( Client ), Nick );
770 		return FALSE;
771 	}
772 
773 	/* Nick bereits vergeben? */
774 	if( Client_Search( Nick ))
775 	{
776 		/* den Nick gibt es bereits */
777 		IRC_WriteStrClient( Client, ERR_NICKNAMEINUSE_MSG, Client_ID( Client ), Nick );
778 		return FALSE;
779 	}
780 
781 	return TRUE;
782 } /* Client_CheckNick */
783 
784 
785 GLOBAL BOOLEAN
786 Client_CheckID( CLIENT *Client, CHAR *ID )
787 {
788 	/* Nick ueberpruefen */
789 
790 	CHAR str[COMMAND_LEN];
791 	CLIENT *c;
792 
793 	assert( Client != NULL );
794 	assert( Client->conn_id > NONE );
795 	assert( ID != NULL );
796 
797 	/* Nick zu lang? */
798 	if( strlen( ID ) > CLIENT_ID_LEN )
799 	{
800 		IRC_WriteStrClient( Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID( Client ), ID );
801 		return FALSE;
802 	}
803 
804 	/* ID bereits vergeben? */
805 	c = My_Clients;
806 	while( c )
807 	{
808 		if( strcasecmp( c->id, ID ) == 0 )
809 		{
810 			/* die Server-ID gibt es bereits */
811 			sprintf( str, "ID \"%s\" already registered!", ID );
812 			Log( LOG_ERR, "%s (on connection %d)", str, Client->conn_id );
813 			Conn_Close( Client->conn_id, str, str, TRUE );
814 			return FALSE;
815 		}
816 		c = (CLIENT *)c->next;
817 	}
818 
819 	return TRUE;
820 } /* Client_CheckID */
821 
822 
823 GLOBAL CLIENT *
824 Client_First( VOID )
825 {
826 	/* Ersten Client liefern. */
827 
828 	return My_Clients;
829 } /* Client_First */
830 
831 
832 GLOBAL CLIENT *
833 Client_Next( CLIENT *c )
834 {
835 	/* Naechsten Client liefern. Existiert keiner,
836 	 * so wird NULL geliefert. */
837 
838 	assert( c != NULL );
839 	return (CLIENT *)c->next;
840 } /* Client_Next */
841 
842 
843 GLOBAL LONG
844 Client_UserCount( VOID )
845 {
846 	return Count( CLIENT_USER );
847 } /* Client_UserCount */
848 
849 
850 GLOBAL LONG
851 Client_ServiceCount( VOID )
852 {
853 	return Count( CLIENT_SERVICE );;
854 } /* Client_ServiceCount */
855 
856 
857 GLOBAL LONG
858 Client_ServerCount( VOID )
859 {
860 	return Count( CLIENT_SERVER );
861 } /* Client_ServerCount */
862 
863 
864 GLOBAL LONG
865 Client_MyUserCount( VOID )
866 {
867 	return MyCount( CLIENT_USER );
868 } /* Client_MyUserCount */
869 
870 
871 GLOBAL LONG
872 Client_MyServiceCount( VOID )
873 {
874 	return MyCount( CLIENT_SERVICE );
875 } /* Client_MyServiceCount */
876 
877 
878 GLOBAL LONG
879 Client_MyServerCount( VOID )
880 {
881 	CLIENT *c;
882 	LONG cnt;
883 
884 	cnt = 0;
885 	c = My_Clients;
886 	while( c )
887 	{
888 		if(( c->type == CLIENT_SERVER ) && ( c->hops == 1 )) cnt++;
889 		c = (CLIENT *)c->next;
890 	}
891 	return cnt;
892 } /* Client_MyServerCount */
893 
894 
895 GLOBAL LONG
896 Client_OperCount( VOID )
897 {
898 	CLIENT *c;
899 	LONG cnt;
900 
901 	cnt = 0;
902 	c = My_Clients;
903 	while( c )
904 	{
905 		if( c && ( c->type == CLIENT_USER ) && ( strchr( c->modes, 'o' ))) cnt++;
906 		c = (CLIENT *)c->next;
907 	}
908 	return cnt;
909 } /* Client_OperCount */
910 
911 
912 GLOBAL LONG
913 Client_UnknownCount( VOID )
914 {
915 	CLIENT *c;
916 	LONG cnt;
917 
918 	cnt = 0;
919 	c = My_Clients;
920 	while( c )
921 	{
922 		if( c && ( c->type != CLIENT_USER ) && ( c->type != CLIENT_SERVICE ) && ( c->type != CLIENT_SERVER )) cnt++;
923 		c = (CLIENT *)c->next;
924 	}
925 	return cnt;
926 } /* Client_UnknownCount */
927 
928 
929 GLOBAL BOOLEAN
930 Client_IsValidNick( CHAR *Nick )
931 {
932 	/* Ist der Nick gueltig? */
933 
934 	CHAR *ptr, goodchars[20];
935 	
936 	assert( Nick != NULL );
937 
938 	strcpy( goodchars, ";0123456789-" );
939 
940 	if( Nick[0] == '#' ) return FALSE;
941 	if( strchr( goodchars, Nick[0] )) return FALSE;
942 	if( strlen( Nick ) >= CLIENT_NICK_LEN ) return FALSE;
943 
944 	ptr = Nick;
945 	while( *ptr )
946 	{
947 		if(( *ptr < 'A' ) && ( ! strchr( goodchars, *ptr ))) return FALSE;
948 		if(( *ptr > '}' ) && ( ! strchr( goodchars, *ptr ))) return FALSE;
949 		ptr++;
950 	}
951 	
952 	return TRUE;
953 } /* Client_IsValidNick */
954 
955 
956 LOCAL LONG
957 Count( CLIENT_TYPE Type )
958 {
959 	CLIENT *c;
960 	LONG cnt;
961 
962 	cnt = 0;
963 	c = My_Clients;
964 	while( c )
965 	{
966 		if( c->type == Type ) cnt++;
967 		c = (CLIENT *)c->next;
968 	}
969 	return cnt;
970 } /* Count */
971 
972 
973 LOCAL LONG
974 MyCount( CLIENT_TYPE Type )
975 {
976 	CLIENT *c;
977 	LONG cnt;
978 
979 	cnt = 0;
980 	c = My_Clients;
981 	while( c )
982 	{
983 		if(( c->introducer == This_Server ) && ( c->type == Type )) cnt++;
984 		c = (CLIENT *)c->next;
985 	}
986 	return cnt;
987 } /* MyCount */
988 
989 
990 LOCAL CLIENT *
991 New_Client_Struct( VOID )
992 {
993 	/* Neue CLIENT-Struktur pre-initialisieren */
994 	
995 	CLIENT *c;
996 	
997 	c = malloc( sizeof( CLIENT ));
998 	if( ! c )
999 	{
1000 		Log( LOG_EMERG, "Can't allocate memory! [New_Client_Struct]" );
1001 		return NULL;
1002 	}
1003 
1004 	c->next = NULL;
1005 	c->hash = 0;
1006 	c->type = CLIENT_UNKNOWN;
1007 	c->conn_id = NONE;
1008 	c->introducer = NULL;
1009 	c->topserver = NULL;
1010 	strcpy( c->id, "" );
1011 	strcpy( c->pwd, "" );
1012 	strcpy( c->host, "" );
1013 	strcpy( c->user, "" );
1014 	strcpy( c->info, "" );
1015 	strcpy( c->modes, "" );
1016 	c->oper_by_me = FALSE;
1017 	c->hops = -1;
1018 	c->token = -1;
1019 	c->mytoken = -1;
1020 	strcpy( c->away, "" );
1021 	strcpy( c->flags, "" );
1022 
1023 	return c;
1024 } /* New_Client */
1025 
1026 
1027 LOCAL VOID
1028 Generate_MyToken( CLIENT *Client )
1029 {
1030 	CLIENT *c;
1031 	INT token;
1032 
1033 	c = My_Clients;
1034 	token = 2;
1035 	while( c )
1036 	{
1037 		if( c->mytoken == token )
1038 		{
1039 			/* Das Token wurde bereits vergeben */
1040 			token++;
1041 			c = My_Clients;
1042 			continue;
1043 		}
1044 		else c = (CLIENT *)c->next;
1045 	}
1046 	Client->mytoken = token;
1047 	Log( LOG_DEBUG, "Assigned token %d to server \"%s\".", token, Client->id );
1048 } /* Generate_MyToken */
1049 
1050 
1051 /* -eof- */