1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001,2002 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  * Configuration management (reading, parsing & validation)
12  */
13 
14 
15 #include "portab.h"
16 
17 static char UNUSED id[] = "$Id: conf.c,v 1.68 2005/02/04 14:24:21 alex Exp $";
18 
19 #include "imp.h"
20 #include <assert.h>
21 #include <errno.h>
22 #ifdef PROTOTYPES
23 #	include <stdarg.h>
24 #else
25 #	include <varargs.h>
26 #endif
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <strings.h>
31 #include <unistd.h>
32 #include <pwd.h>
33 #include <grp.h>
34 #include <sys/types.h>
35 #include <unistd.h>
36 
37 #ifdef HAVE_CTYPE_H
38 # include <ctype.h>
39 #endif
40 
41 #include "ngircd.h"
42 #include "conn.h"
43 #include "client.h"
44 #include "defines.h"
45 #include "log.h"
46 #include "resolve.h"
47 #include "tool.h"
48 
49 #include "exp.h"
50 #include "conf.h"
51 
52 
53 LOCAL BOOLEAN Use_Log = TRUE;
54 LOCAL CONF_SERVER New_Server;
55 LOCAL INT New_Server_Idx;
56 
57 
58 LOCAL VOID Set_Defaults PARAMS(( BOOLEAN InitServers ));
59 LOCAL VOID Read_Config PARAMS(( VOID ));
60 LOCAL VOID Validate_Config PARAMS(( BOOLEAN TestOnly ));
61 
62 LOCAL VOID Handle_GLOBAL PARAMS(( INT Line, CHAR *Var, CHAR *Arg ));
63 LOCAL VOID Handle_OPERATOR PARAMS(( INT Line, CHAR *Var, CHAR *Arg ));
64 LOCAL VOID Handle_SERVER PARAMS(( INT Line, CHAR *Var, CHAR *Arg ));
65 LOCAL VOID Handle_CHANNEL PARAMS(( INT Line, CHAR *Var, CHAR *Arg ));
66 
67 LOCAL VOID Config_Error PARAMS(( CONST INT Level, CONST CHAR *Format, ... ));
68 
69 LOCAL VOID Config_Error_NaN PARAMS(( INT LINE, CONST CHAR *Value ));
70 LOCAL VOID Config_Error_TooLong PARAMS(( INT LINE, CONST CHAR *Value ));
71 
72 LOCAL VOID Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
73 
74 
75 GLOBAL VOID
76 Conf_Init( VOID )
77 {
78 	Set_Defaults( TRUE );
79 	Read_Config( );
80 	Validate_Config( FALSE );
81 } /* Config_Init */
82 
83 
84 GLOBAL VOID
85 Conf_Rehash( VOID )
86 {
87 	Set_Defaults( FALSE );
88 	Read_Config( );
89 	Validate_Config( FALSE );
90 } /* Config_Rehash */
91 
92 
93 GLOBAL INT
94 Conf_Test( VOID )
95 {
96 	/* Read configuration, validate and output it. */
97 
98 	struct passwd *pwd;
99 	struct group *grp;
100 	INT i;
101 
102 	Use_Log = FALSE;
103 	Set_Defaults( TRUE );
104 
105 	Read_Config( );
106 	Validate_Config( TRUE );
107 
108 	/* If stdin is a valid tty wait for a key: */
109 	if( isatty( fileno( stdout )))
110 	{
111 		puts( "OK, press enter to see a dump of your service configuration ..." );
112 		getchar( );
113 	}
114 	else puts( "Ok, dump of your server configuration follows:\n" );
115 
116 	puts( "[GLOBAL]" );
117 	printf( "  Name = %s\n", Conf_ServerName );
118 	printf( "  Info = %s\n", Conf_ServerInfo );
119 	printf( "  Password = %s\n", Conf_ServerPwd );
120 	printf( "  AdminInfo1 = %s\n", Conf_ServerAdmin1 );
121 	printf( "  AdminInfo2 = %s\n", Conf_ServerAdmin2 );
122 	printf( "  AdminEMail = %s\n", Conf_ServerAdminMail );
123 	printf( "  MotdFile = %s\n", Conf_MotdFile );
124 	printf( "  MotdPhrase = %s\n", Conf_MotdPhrase );
125 	printf( "  ChrootDir = %s\n", Conf_Chroot );
126 	printf( "  PidFile = %s\n", Conf_PidFile);
127 	printf( "  Ports = " );
128 	for( i = 0; i < Conf_ListenPorts_Count; i++ )
129 	{
130 		if( i != 0 ) printf( ", " );
131 		printf( "%u", Conf_ListenPorts[i] );
132 	}
133 	puts( "" );
134 	printf( "  Listen = %s\n", Conf_ListenAddress );
135 	pwd = getpwuid( Conf_UID );
136 	if( pwd ) printf( "  ServerUID = %s\n", pwd->pw_name );
137 	else printf( "  ServerUID = %ld\n", (LONG)Conf_UID );
138 	grp = getgrgid( Conf_GID );
139 	if( grp ) printf( "  ServerGID = %s\n", grp->gr_name );
140 	else printf( "  ServerGID = %ld\n", (LONG)Conf_GID );
141 	printf( "  PingTimeout = %d\n", Conf_PingTimeout );
142 	printf( "  PongTimeout = %d\n", Conf_PongTimeout );
143 	printf( "  ConnectRetry = %d\n", Conf_ConnectRetry );
144 	printf( "  OperCanUseMode = %s\n", Conf_OperCanMode == TRUE ? "yes" : "no" );
145 	if( Conf_MaxConnections > 0 ) printf( "  MaxConnections = %ld\n", Conf_MaxConnections );
146 	else printf( "  MaxConnections = -1\n" );
147 	if( Conf_MaxConnectionsIP > 0 ) printf( "  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP );
148 	else printf( "  MaxConnectionsIP = -1\n" );
149 	if( Conf_MaxJoins > 0 ) printf( "  MaxJoins = %d\n", Conf_MaxJoins );
150 	else printf( "  MaxJoins = -1\n" );
151 	puts( "" );
152 
153 	for( i = 0; i < Conf_Oper_Count; i++ )
154 	{
155 		if( ! Conf_Oper[i].name[0] ) continue;
156 		
157 		/* Valid "Operator" section */
158 		puts( "[OPERATOR]" );
159 		printf( "  Name = %s\n", Conf_Oper[i].name );
160 		printf( "  Password = %s\n", Conf_Oper[i].pwd );
161 		puts( "" );
162 	}
163 
164 	for( i = 0; i < MAX_SERVERS; i++ )
165 	{
166 		if( ! Conf_Server[i].name[0] ) continue;
167 		
168 		/* Valid "Server" section */
169 		puts( "[SERVER]" );
170 		printf( "  Name = %s\n", Conf_Server[i].name );
171 		printf( "  Host = %s\n", Conf_Server[i].host );
172 		printf( "  Port = %d\n", Conf_Server[i].port );
173 		printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
174 		printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
175 		printf( "  Group = %d\n", Conf_Server[i].group );
176 		puts( "" );
177 	}
178 
179 	for( i = 0; i < Conf_Channel_Count; i++ )
180 	{
181 		if( ! Conf_Channel[i].name[0] ) continue;
182 		
183 		/* Valid "Channel" section */
184 		puts( "[CHANNEL]" );
185 		printf( "  Name = %s\n", Conf_Channel[i].name );
186 		printf( "  Modes = %s\n", Conf_Channel[i].modes );
187 		printf( "  Topic = %s\n", Conf_Channel[i].topic );
188 		puts( "" );
189 	}
190 	
191 	return 0;
192 } /* Conf_Test */
193 
194 
195 GLOBAL VOID
196 Conf_UnsetServer( CONN_ID Idx )
197 {
198 	/* Set next time for next connection attempt, if this is a server
199 	 * link that is (still) configured here. If the server is set as
200 	 * "once", delete it from our configuration.
201 	 * Non-Server-Connections will be silently ignored. */
202 
203 	INT i;
204 
205 	/* Check all our configured servers */
206 	for( i = 0; i < MAX_SERVERS; i++ )
207 	{
208 		if( Conf_Server[i].conn_id != Idx ) continue;
209 
210 		/* Gotcha! Mark server configuration as "unused": */
211 		Conf_Server[i].conn_id = NONE;
212 
213 		if( Conf_Server[i].flags & CONF_SFLAG_ONCE )
214 		{
215 			/* Delete configuration here */
216 			Init_Server_Struct( &Conf_Server[i] );
217 		}
218 		else
219 		{
220 			/* Set time for next connect attempt */
221 			if( Conf_Server[i].lasttry <  time( NULL ) - Conf_ConnectRetry )
222 			{
223 				/* Okay, the connection was established "long enough": */
224 				Conf_Server[i].lasttry = time( NULL ) - Conf_ConnectRetry + RECONNECT_DELAY;
225 			}
226 		}
227 	}
228 } /* Conf_UnsetServer */
229 
230 
231 GLOBAL VOID
232 Conf_SetServer( INT ConfServer, CONN_ID Idx )
233 {
234 	/* Set connection for specified configured server */
235 
236 	assert( ConfServer > NONE );
237 	assert( Idx > NONE );
238 
239 	Conf_Server[ConfServer].conn_id = Idx;
240 } /* Conf_SetServer */
241 
242 
243 GLOBAL INT
244 Conf_GetServer( CONN_ID Idx )
245 {
246 	/* Get index of server in configuration structure */
247 	
248 	INT i = 0;
249 	
250 	assert( Idx > NONE );
251 
252 	for( i = 0; i < MAX_SERVERS; i++ )
253 	{
254 		if( Conf_Server[i].conn_id == Idx ) return i;
255 	}
256 	return NONE;
257 } /* Conf_GetServer */
258 
259 
260 GLOBAL BOOLEAN
261 Conf_EnableServer( CHAR *Name, INT Port )
262 {
263 	/* Enable specified server and adjust port */
264 
265 	INT i;
266 
267 	assert( Name != NULL );
268 
269 	for( i = 0; i < MAX_SERVERS; i++ )
270 	{
271 		if( strcasecmp( Conf_Server[i].name, Name ) == 0 )
272 		{
273 			/* Gotcha! Set port and enable server: */
274 			Conf_Server[i].port = Port;
275 			Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
276 			return TRUE;
277 		}
278 	}
279 	return FALSE;
280 } /* Conf_EnableServer */
281 
282 
283 GLOBAL BOOLEAN
284 Conf_DisableServer( CHAR *Name )
285 {
286 	/* Enable specified server and adjust port */
287 
288 	INT i;
289 
290 	assert( Name != NULL );
291 
292 	for( i = 0; i < MAX_SERVERS; i++ )
293 	{
294 		if( strcasecmp( Conf_Server[i].name, Name ) == 0 )
295 		{
296 			/* Gotcha! Disable and disconnect server: */
297 			Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
298 			if( Conf_Server[i].conn_id > NONE ) Conn_Close( Conf_Server[i].conn_id, NULL, "Server link terminated on operator request", TRUE );
299 			return TRUE;
300 		}
301 	}
302 	return FALSE;
303 } /* Conf_DisableServer */
304 
305 
306 GLOBAL BOOLEAN
307 Conf_AddServer( CHAR *Name, INT Port, CHAR *Host, CHAR *MyPwd, CHAR *PeerPwd )
308 {
309 	/* Add new server to configuration */
310 
311 	INT i;
312 
313 	assert( Name != NULL );
314 	assert( Host != NULL );
315 	assert( MyPwd != NULL );
316 	assert( PeerPwd != NULL );
317 
318 	/* Search unused item in server configuration structure */
319 	for( i = 0; i < MAX_SERVERS; i++ )
320 	{
321 		/* Is this item used? */
322 		if( ! Conf_Server[i].name[0] ) break;
323 	}
324 	if( i >= MAX_SERVERS ) return FALSE;
325 
326 	Init_Server_Struct( &Conf_Server[i] );
327 	strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
328 	strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
329 	strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
330 	strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
331 	Conf_Server[i].port = Port;
332 	Conf_Server[i].flags = CONF_SFLAG_ONCE;
333 	
334 	return TRUE;
335 } /* Conf_AddServer */
336 
337 
338 LOCAL VOID
339 Set_Defaults( BOOLEAN InitServers )
340 {
341 	/* Initialize configuration variables with default values. */
342 
343 	INT i;
344 
345 	strcpy( Conf_ServerName, "" );
346 	sprintf( Conf_ServerInfo, "%s %s", PACKAGE_NAME, PACKAGE_VERSION );
347 	strcpy( Conf_ServerPwd, "" );
348 
349 	strcpy( Conf_ServerAdmin1, "" );
350 	strcpy( Conf_ServerAdmin2, "" );
351 	strcpy( Conf_ServerAdminMail, "" );
352 
353 	strlcpy( Conf_MotdFile, SYSCONFDIR, sizeof( Conf_MotdFile ));
354 	strlcat( Conf_MotdFile, MOTD_FILE, sizeof( Conf_MotdFile ));
355 
356 	strlcpy( Conf_MotdPhrase, MOTD_PHRASE, sizeof( Conf_MotdPhrase ));
357 
358 	strlcpy( Conf_Chroot, CHROOT_DIR, sizeof( Conf_Chroot ));
359 
360 	strlcpy( Conf_PidFile, PID_FILE, sizeof( Conf_PidFile ));
361 
362 	Conf_ListenPorts_Count = 0;
363 	strcpy( Conf_ListenAddress, "" );
364 
365 	Conf_UID = Conf_GID = 0;
366 	
367 	Conf_PingTimeout = 120;
368 	Conf_PongTimeout = 20;
369 
370 	Conf_ConnectRetry = 60;
371 
372 	Conf_Oper_Count = 0;
373 	Conf_Channel_Count = 0;
374 
375 	Conf_OperCanMode = FALSE;
376 	
377 	Conf_MaxConnections = -1;
378 	Conf_MaxConnectionsIP = 5;
379 	Conf_MaxJoins = 10;
380 
381 	/* Initialize server configuration structures */
382 	if( InitServers ) for( i = 0; i < MAX_SERVERS; Init_Server_Struct( &Conf_Server[i++] ));
383 } /* Set_Defaults */
384 
385 
386 LOCAL VOID
387 Read_Config( VOID )
388 {
389 	/* Read configuration file. */
390 
391 	CHAR section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
392 	INT line, i, n;
393 	FILE *fd;
394 
395 	/* Open configuration file */
396 	fd = fopen( NGIRCd_ConfFile, "r" );
397 	if( ! fd )
398 	{
399 		/* No configuration file found! */
400 		Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s", NGIRCd_ConfFile, strerror( errno ));
401 		Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
402 		exit( 1 );
403 	}
404 
405 	Config_Error( LOG_INFO, "Reading configuration from \"%s\" ...", NGIRCd_ConfFile );
406 
407 	/* Clean up server configuration structure: mark all already
408 	 * configured servers as "once" so that they are deleted
409 	 * after the next disconnect and delete all unused servers.
410 	 * And delete all servers which are "duplicates" of servers
411 	 * that are already marked as "once" (such servers have been
412 	 * created by the last rehash but are now useless). */
413 	for( i = 0; i < MAX_SERVERS; i++ )
414 	{
415 		if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
416 		else
417 		{
418 			/* This structure is in use ... */
419 			if( Conf_Server[i].flags & CONF_SFLAG_ONCE )
420 			{
421 				/* Check for duplicates */
422 				for( n = 0; n < MAX_SERVERS; n++ )
423 				{
424 					if( n == i ) continue;
425 
426 					if( Conf_Server[i].conn_id == Conf_Server[n].conn_id )
427 					{
428 						Init_Server_Struct( &Conf_Server[n] );
429 						Log( LOG_DEBUG, "Deleted unused duplicate server %d (kept %d).", n, i );
430 					}
431 				}
432 			}
433 			else
434 			{
435 				/* Mark server as "once" */
436 				Conf_Server[i].flags |= CONF_SFLAG_ONCE;
437 				Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
438 			}
439 		}
440 	}
441 
442 	/* Initialize variables */
443 	line = 0;
444 	strcpy( section, "" );
445 	Init_Server_Struct( &New_Server );
446 	New_Server_Idx = NONE;
447 
448 	/* Read configuration file */
449 	while( TRUE )
450 	{
451 		if( ! fgets( str, LINE_LEN, fd )) break;
452 		ngt_TrimStr( str );
453 		line++;
454 
455 		/* Skip comments and empty lines */
456 		if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
457 
458 		/* Is this the beginning of a new section? */
459 		if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' ))
460 		{
461 			strlcpy( section, str, sizeof( section ));
462 			if( strcasecmp( section, "[GLOBAL]" ) == 0 ) continue;
463 			if( strcasecmp( section, "[OPERATOR]" ) == 0 )
464 			{
465 				if( Conf_Oper_Count + 1 > MAX_OPERATORS ) Config_Error( LOG_ERR, "Too many operators configured." );
466 				else
467 				{
468 					/* Initialize new operator structure */
469 					strcpy( Conf_Oper[Conf_Oper_Count].name, "" );
470 					strcpy( Conf_Oper[Conf_Oper_Count].pwd, "" );
471 					Conf_Oper_Count++;
472 				}
473 				continue;
474 			}
475 			if( strcasecmp( section, "[SERVER]" ) == 0 )
476 			{
477 				/* Check if there is already a server to add */
478 				if( New_Server.name[0] )
479 				{
480 					/* Copy data to "real" server structure */
481 					assert( New_Server_Idx > NONE );
482 					Conf_Server[New_Server_Idx] = New_Server;
483 				}
484 
485 				/* Re-init structure for new server */
486 				Init_Server_Struct( &New_Server );
487 
488 				/* Search unused item in server configuration structure */
489 				for( i = 0; i < MAX_SERVERS; i++ )
490 				{
491 					/* Is this item used? */
492 					if( ! Conf_Server[i].name[0] ) break;
493 				}
494 				if( i >= MAX_SERVERS )
495 				{
496 					/* Oops, no free item found! */
497 					Config_Error( LOG_ERR, "Too many servers configured." );
498 					New_Server_Idx = NONE;
499 				}
500 				else New_Server_Idx = i;
501 				continue;
502 			}
503 			if( strcasecmp( section, "[CHANNEL]" ) == 0 )
504 			{
505 				if( Conf_Channel_Count + 1 > MAX_DEFCHANNELS ) Config_Error( LOG_ERR, "Too many pre-defined channels configured." );
506 				else
507 				{
508 					/* Initialize new channel structure */
509 					strcpy( Conf_Channel[Conf_Channel_Count].name, "" );
510 					strcpy( Conf_Channel[Conf_Channel_Count].modes, "" );
511 					strcpy( Conf_Channel[Conf_Channel_Count].topic, "" );
512 					Conf_Channel_Count++;
513 				}
514 				continue;
515 			}
516 			Config_Error( LOG_ERR, "%s, line %d: Unknown section \"%s\"!", NGIRCd_ConfFile, line, section );
517 			section[0] = 0x1;
518 		}
519 		if( section[0] == 0x1 ) continue;
520 
521 		/* Split line into variable name and parameters */
522 		ptr = strchr( str, '=' );
523 		if( ! ptr )
524 		{
525 			Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
526 			continue;
527 		}
528 		*ptr = '\0';
529 		var = str; ngt_TrimStr( var );
530 		arg = ptr + 1; ngt_TrimStr( arg );
531 
532 		if( strcasecmp( section, "[GLOBAL]" ) == 0 ) Handle_GLOBAL( line, var, arg );
533 		else if( strcasecmp( section, "[OPERATOR]" ) == 0 ) Handle_OPERATOR( line, var, arg );
534 		else if( strcasecmp( section, "[SERVER]" ) == 0 ) Handle_SERVER( line, var, arg );
535 		else if( strcasecmp( section, "[CHANNEL]" ) == 0 ) Handle_CHANNEL( line, var, arg );
536 		else Config_Error( LOG_ERR, "%s, line %d: Variable \"%s\" outside section!", NGIRCd_ConfFile, line, var );
537 	}
538 
539 	/* Close configuration file */
540 	fclose( fd );
541 
542 	/* Check if there is still a server to add */
543 	if( New_Server.name[0] )
544 	{
545 		/* Copy data to "real" server structure */
546 		assert( New_Server_Idx > NONE );
547 		Conf_Server[New_Server_Idx] = New_Server;
548 	}
549 	
550 	/* If there are no ports configured use the default: 6667 */
551 	if( Conf_ListenPorts_Count < 1 )
552 	{
553 		Conf_ListenPorts_Count = 1;
554 		Conf_ListenPorts[0] = 6667;
555 	}
556 } /* Read_Config */
557 
558 
559 LOCAL VOID
560 Handle_GLOBAL( INT Line, CHAR *Var, CHAR *Arg )
561 {
562 	struct passwd *pwd;
563 	struct group *grp;
564 	CHAR *ptr;
565 	LONG port;
566 	
567 	assert( Line > 0 );
568 	assert( Var != NULL );
569 	assert( Arg != NULL );
570 	
571 	if( strcasecmp( Var, "Name" ) == 0 )
572 	{
573 		/* Server name */
574 		if( strlcpy( Conf_ServerName, Arg, sizeof( Conf_ServerName )) >= sizeof( Conf_ServerName ))
575 			Config_Error_TooLong( Line, Var );
576 
577 		return;
578 	}
579 	if( strcasecmp( Var, "Info" ) == 0 )
580 	{
581 		/* Info text of server */
582 		if( strlcpy( Conf_ServerInfo, Arg, sizeof( Conf_ServerInfo )) >= sizeof( Conf_ServerInfo ))
583 			Config_Error_TooLong ( Line, Var );
584 
585 		return;
586 	}
587 	if( strcasecmp( Var, "Password" ) == 0 )
588 	{
589 		/* Global server password */
590 		if( strlcpy( Conf_ServerPwd, Arg, sizeof( Conf_ServerPwd )) >= sizeof( Conf_ServerPwd ))
591 			Config_Error_TooLong( Line, Var );
592 
593 		return;
594 	}
595 	if( strcasecmp( Var, "AdminInfo1" ) == 0 )
596 	{
597 		/* Administrative info #1 */
598 		if( strlcpy( Conf_ServerAdmin1, Arg, sizeof( Conf_ServerAdmin1 )) >= sizeof( Conf_ServerAdmin1 )) Config_Error_TooLong ( Line, Var );
599 		return;
600 	}
601 	if( strcasecmp( Var, "AdminInfo2" ) == 0 )
602 	{
603 		/* Administrative info #2 */
604 		if( strlcpy( Conf_ServerAdmin2, Arg, sizeof( Conf_ServerAdmin2 )) >= sizeof( Conf_ServerAdmin2 )) Config_Error_TooLong ( Line, Var );
605 		return;
606 	}
607 	if( strcasecmp( Var, "AdminEMail" ) == 0 )
608 	{
609 		/* Administrative email contact */
610 		if( strlcpy( Conf_ServerAdminMail, Arg, sizeof( Conf_ServerAdminMail )) >= sizeof( Conf_ServerAdminMail )) Config_Error_TooLong( Line, Var );
611 		return;
612 	}
613 	if( strcasecmp( Var, "Ports" ) == 0 )
614 	{
615 		/* Ports on that the server should listen. More port numbers
616 		 * must be separated by "," */
617 		ptr = strtok( Arg, "," );
618 		while( ptr )
619 		{
620 			ngt_TrimStr( ptr );
621 			port = atol( ptr );
622 			if( Conf_ListenPorts_Count + 1 > MAX_LISTEN_PORTS ) Config_Error( LOG_ERR, "Too many listen ports configured. Port %ld ignored.", port );
623 			else
624 			{
625 				if( port > 0 && port < 0xFFFF ) Conf_ListenPorts[Conf_ListenPorts_Count++] = (UINT)port;
626 				else Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!", NGIRCd_ConfFile, Line, port );
627 			}
628 			ptr = strtok( NULL, "," );
629 		}
630 		return;
631 	}
632 	if( strcasecmp( Var, "MotdFile" ) == 0 )
633 	{
634 		/* "Message of the day" (MOTD) file */
635 		if( strlcpy( Conf_MotdFile, Arg, sizeof( Conf_MotdFile )) >= sizeof( Conf_MotdFile ))
636 			Config_Error_TooLong( Line, Var );
637 
638 		return;
639 	}
640 	if( strcasecmp( Var, "MotdPhrase" ) == 0 )
641 	{
642 		/* "Message of the day" phrase (instead of file) */
643 		if( strlcpy( Conf_MotdPhrase, Arg, sizeof( Conf_MotdPhrase )) >= sizeof( Conf_MotdPhrase ))
644 			Config_Error_TooLong( Line, Var );
645 
646 		return;
647 	}
648 	if( strcasecmp( Var, "ChrootDir" ) == 0 )
649 	{
650 		/* directory for chroot() */
651 		if( strlcpy( Conf_Chroot, Arg, sizeof( Conf_Chroot )) >= sizeof( Conf_Chroot ))
652 			Config_Error_TooLong( Line, Var );
653 
654 		return;
655 	}
656 
657 	if ( strcasecmp( Var, "PidFile" ) == 0 )
658 	{
659 		/* name of pidfile */
660 		if( strlcpy( Conf_PidFile, Arg, sizeof( Conf_PidFile )) >= sizeof( Conf_PidFile ))
661 			Config_Error_TooLong( Line, Var );
662 
663 		return;
664 	}
665 
666 	if( strcasecmp( Var, "ServerUID" ) == 0 )
667 	{
668 		/* UID the daemon should switch to */
669 		pwd = getpwnam( Arg );
670 		if( pwd ) Conf_UID = pwd->pw_uid;
671 		else
672 		{
673 #ifdef HAVE_ISDIGIT
674 			if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var );
675 			else
676 #endif
677 			Conf_UID = (UINT)atoi( Arg );
678 		}
679 		return;
680 	}
681 	if( strcasecmp( Var, "ServerGID" ) == 0 )
682 	{
683 		/* GID the daemon should use */
684 		grp = getgrnam( Arg );
685 		if( grp ) Conf_GID = grp->gr_gid;
686 		else
687 		{
688 #ifdef HAVE_ISDIGIT
689 			if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var );
690 			else
691 #endif
692 			Conf_GID = (UINT)atoi( Arg );
693 		}
694 		return;
695 	}
696 	if( strcasecmp( Var, "PingTimeout" ) == 0 )
697 	{
698 		/* PING timeout */
699 		Conf_PingTimeout = atoi( Arg );
700 		if( Conf_PingTimeout < 5 )
701 		{
702 			Config_Error( LOG_WARNING, "%s, line %d: Value of \"PingTimeout\" too low!", NGIRCd_ConfFile, Line );
703 			Conf_PingTimeout = 5;
704 		}
705 		return;
706 	}
707 	if( strcasecmp( Var, "PongTimeout" ) == 0 )
708 	{
709 		/* PONG timeout */
710 		Conf_PongTimeout = atoi( Arg );
711 		if( Conf_PongTimeout < 5 )
712 		{
713 			Config_Error( LOG_WARNING, "%s, line %d: Value of \"PongTimeout\" too low!", NGIRCd_ConfFile, Line );
714 			Conf_PongTimeout = 5;
715 		}
716 		return;
717 	}
718 	if( strcasecmp( Var, "ConnectRetry" ) == 0 )
719 	{
720 		/* Seconds between connection attempts to other servers */
721 		Conf_ConnectRetry = atoi( Arg );
722 		if( Conf_ConnectRetry < 5 )
723 		{
724 			Config_Error( LOG_WARNING, "%s, line %d: Value of \"ConnectRetry\" too low!", NGIRCd_ConfFile, Line );
725 			Conf_ConnectRetry = 5;
726 		}
727 		return;
728 	}
729 	if( strcasecmp( Var, "OperCanUseMode" ) == 0 )
730 	{
731 		/* Are IRC operators allowed to use MODE in channels they aren't Op in? */
732 		if( strcasecmp( Arg, "yes" ) == 0 ) Conf_OperCanMode = TRUE;
733 		else if( strcasecmp( Arg, "true" ) == 0 ) Conf_OperCanMode = TRUE;
734 		else if( atoi( Arg ) != 0 ) Conf_OperCanMode = TRUE;
735 		else Conf_OperCanMode = FALSE;
736 		return;
737 	}
738 	if( strcasecmp( Var, "MaxConnections" ) == 0 )
739 	{
740 		/* Maximum number of connections. Values <= 0 are equal to "no limit". */
741 #ifdef HAVE_ISDIGIT
742 		if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var);
743 		else
744 #endif
745 		Conf_MaxConnections = atol( Arg );
746 		return;
747 	}
748 	if( strcasecmp( Var, "MaxConnectionsIP" ) == 0 )
749 	{
750 		/* Maximum number of simoultanous connections from one IP. Values <= 0 are equal to "no limit". */
751 #ifdef HAVE_ISDIGIT
752 		if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var );
753 		else
754 #endif
755 		Conf_MaxConnectionsIP = atoi( Arg );
756 		return;
757 	}
758 	if( strcasecmp( Var, "MaxJoins" ) == 0 )
759 	{
760 		/* Maximum number of channels a user can join. Values <= 0 are equal to "no limit". */
761 #ifdef HAVE_ISDIGIT
762 		if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var );
763 		else
764 #endif
765 		Conf_MaxJoins = atoi( Arg );
766 		return;
767 	}
768 	if( strcasecmp( Var, "Listen" ) == 0 )
769 	{
770 		/* IP-Address to bind sockets */
771 		if( strlcpy( Conf_ListenAddress, Arg, sizeof( Conf_ListenAddress )) >= sizeof( Conf_ListenAddress ))
772 		{
773 			Config_Error_TooLong( Line, Var );
774 		}
775 		return;
776 	}
777 
778 	Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Unknown variable \"%s\"!", NGIRCd_ConfFile, Line, Var );
779 } /* Handle_GLOBAL */
780 
781 
782 LOCAL VOID
783 Handle_OPERATOR( INT Line, CHAR *Var, CHAR *Arg )
784 {
785 	assert( Line > 0 );
786 	assert( Var != NULL );
787 	assert( Arg != NULL );
788 	assert( Conf_Oper_Count > 0 );
789 
790 	if( strcasecmp( Var, "Name" ) == 0 )
791 	{
792 		/* Name of IRC operator */
793 		if( strlcpy( Conf_Oper[Conf_Oper_Count - 1].name, Arg, sizeof( Conf_Oper[Conf_Oper_Count - 1].name )) >= sizeof( Conf_Oper[Conf_Oper_Count - 1].name )) Config_Error_TooLong( Line, Var );
794 		return;
795 	}
796 	if( strcasecmp( Var, "Password" ) == 0 )
797 	{
798 		/* Password of IRC operator */
799 		if( strlcpy( Conf_Oper[Conf_Oper_Count - 1].pwd, Arg, sizeof( Conf_Oper[Conf_Oper_Count - 1].pwd )) >= sizeof( Conf_Oper[Conf_Oper_Count - 1].pwd )) Config_Error_TooLong( Line, Var );
800 		return;
801 	}
802 	
803 	Config_Error( LOG_ERR, "%s, line %d (section \"Operator\"): Unknown variable \"%s\"!", NGIRCd_ConfFile, Line, Var );
804 } /* Handle_OPERATOR */
805 
806 
807 LOCAL VOID
808 Handle_SERVER( INT Line, CHAR *Var, CHAR *Arg )
809 {
810 	LONG port;
811 	
812 	assert( Line > 0 );
813 	assert( Var != NULL );
814 	assert( Arg != NULL );
815 
816 	/* Ignore server block if no space is left in server configuration structure */
817 	if( New_Server_Idx <= NONE ) return;
818 
819 	if( strcasecmp( Var, "Host" ) == 0 )
820 	{
821 		/* Hostname of the server */
822 		if( strlcpy( New_Server.host, Arg, sizeof( New_Server.host )) >= sizeof( New_Server.host ))
823 			Config_Error_TooLong ( Line, Var );
824 
825 		return;
826 	}
827 	if( strcasecmp( Var, "Name" ) == 0 )
828 	{
829 		/* Name of the server ("Nick"/"ID") */
830 		if( strlcpy( New_Server.name, Arg, sizeof( New_Server.name )) >= sizeof( New_Server.name ))
831 			Config_Error_TooLong( Line, Var );
832 		return;
833 	}
834 	if( strcasecmp( Var, "MyPassword" ) == 0 )
835 	{
836 		/* Password of this server which is sent to the peer */
837 		if( strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in )) >= sizeof( New_Server.pwd_in )) Config_Error_TooLong( Line, Var );
838 		return;
839 	}
840 	if( strcasecmp( Var, "PeerPassword" ) == 0 )
841 	{
842 		/* Passwort of the peer which must be received */
843 		if( strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out )) >= sizeof( New_Server.pwd_out )) Config_Error_TooLong( Line, Var );
844 		return;
845 	}
846 	if( strcasecmp( Var, "Port" ) == 0 )
847 	{
848 		/* Port to which this server should connect */
849 		port = atol( Arg );
850 		if( port > 0 && port < 0xFFFF ) New_Server.port = (INT)port;
851 		else Config_Error( LOG_ERR, "%s, line %d (section \"Server\"): Illegal port number %ld!", NGIRCd_ConfFile, Line, port );
852 		return;
853 	}
854 	if( strcasecmp( Var, "Group" ) == 0 )
855 	{
856 		/* Server group */
857 #ifdef HAVE_ISDIGIT
858 		if( ! isdigit( (INT)*Arg )) Config_Error_NaN( Line, Var );
859 		else
860 #endif
861 		New_Server.group = atoi( Arg );
862 		return;
863 	}
864 	
865 	Config_Error( LOG_ERR, "%s, line %d (section \"Server\"): Unknown variable \"%s\"!", NGIRCd_ConfFile, Line, Var );
866 } /* Handle_SERVER */
867 
868 
869 LOCAL VOID
870 Handle_CHANNEL( INT Line, CHAR *Var, CHAR *Arg )
871 {
872 	assert( Line > 0 );
873 	assert( Var != NULL );
874 	assert( Arg != NULL );
875 
876 	if( strcasecmp( Var, "Name" ) == 0 )
877 	{
878 		/* Name of the channel */
879 		if( strlcpy( Conf_Channel[Conf_Channel_Count - 1].name, Arg, sizeof( Conf_Channel[Conf_Channel_Count - 1].name )) >= sizeof( Conf_Channel[Conf_Channel_Count - 1].name ))
880 			Config_Error_TooLong( Line, Var );
881 		return;
882 	}
883 	if( strcasecmp( Var, "Modes" ) == 0 )
884 	{
885 		/* Initial modes */
886 		if( strlcpy( Conf_Channel[Conf_Channel_Count - 1].modes, Arg, sizeof( Conf_Channel[Conf_Channel_Count - 1].modes )) >= sizeof( Conf_Channel[Conf_Channel_Count - 1].modes ))
887 			Config_Error_TooLong( Line, Var );
888 		return;
889 	}
890 	if( strcasecmp( Var, "Topic" ) == 0 )
891 	{
892 		/* Initial topic */
893 		if( strlcpy( Conf_Channel[Conf_Channel_Count - 1].topic, Arg, sizeof( Conf_Channel[Conf_Channel_Count - 1].topic )) >= sizeof( Conf_Channel[Conf_Channel_Count - 1].topic ))
894 			Config_Error_TooLong( Line, Var );
895  
896 		return;
897 	}
898 
899 	Config_Error( LOG_ERR, "%s, line %d (section \"Channel\"): Unknown variable \"%s\"!", NGIRCd_ConfFile, Line, Var );
900 } /* Handle_CHANNEL */
901 
902 
903 LOCAL VOID
904 Validate_Config( BOOLEAN Configtest )
905 {
906 	/* Validate configuration settings. */
907 
908 #ifdef DEBUG
909 	INT i, servers, servers_once;
910 #endif
911 
912 	if( ! Conf_ServerName[0] )
913 	{
914 		/* No server name configured! */
915 		Config_Error( LOG_ALERT, "No server name configured in \"%s\" (section 'Global': 'Name')!", NGIRCd_ConfFile );
916 		if( ! Configtest )
917 		{
918 			Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
919 			exit( 1 );
920 		}
921 	}
922 	
923 	if( Conf_ServerName[0] && ! strchr( Conf_ServerName, '.' ))
924 	{
925 		/* No dot in server name! */
926 		Config_Error( LOG_ALERT, "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!", NGIRCd_ConfFile );
927 		if( ! Configtest )
928 		{
929 			Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
930 			exit( 1 );
931 		}
932 	}
933 
934 #ifdef STRICT_RFC
935 	if( ! Conf_ServerAdminMail[0] )
936 	{
937 		/* No administrative contact configured! */
938 		Config_Error( LOG_ALERT, "No administrator email address configured in \"%s\" ('AdminEMail')!", NGIRCd_ConfFile );
939 		if( ! Configtest )
940 		{
941 			Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
942 			exit( 1 );
943 		}
944 	}
945 #endif
946 
947 	if( ! Conf_ServerAdmin1[0] && ! Conf_ServerAdmin2[0] && ! Conf_ServerAdminMail[0] )
948 	{
949 		/* No administrative information configured! */
950 		Config_Error( LOG_WARNING, "No administrative information configured but required by RFC!" );
951 	}
952 #ifdef FD_SETSIZE	
953 	if(( Conf_MaxConnections > (LONG)FD_SETSIZE ) || ( Conf_MaxConnections < 1 ))
954 	{
955 		Conf_MaxConnections = (LONG)FD_SETSIZE;
956 		Config_Error( LOG_ERR, "Setting MaxConnections to %ld, select() can't handle more file descriptors!", Conf_MaxConnections );
957 	}
958 #else
959 	Config_Error( LOG_WARN, "Don't know how many file descriptors select() can handle on this system, don't set MaxConnections too high!" );
960 #endif
961 
962 #ifdef DEBUG
963 	servers = servers_once = 0;
964 	for( i = 0; i < MAX_SERVERS; i++ )
965 	{
966 		if( Conf_Server[i].name[0] )
967 		{
968 			servers++;
969 			if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) servers_once++;
970 		}
971 	}
972 	Log( LOG_DEBUG, "Configuration: Operators=%d, Servers=%d[%d], Channels=%d", Conf_Oper_Count, servers, servers_once, Conf_Channel_Count );
973 #endif
974 } /* Validate_Config */
975 
976 
977 LOCAL VOID
978 Config_Error_TooLong ( CONST INT Line, CONST CHAR *Item )
979 {
980 	Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
981 }
982 
983 LOCAL VOID
984 Config_Error_NaN( CONST INT Line, CONST CHAR *Item )
985 {
986 	Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!", NGIRCd_ConfFile, Line, Item );
987 }
988 
989 #ifdef PROTOTYPES
990 LOCAL VOID Config_Error( CONST INT Level, CONST CHAR *Format, ... )
991 #else
992 LOCAL VOID Config_Error( Level, Format, va_alist )
993 CONST INT Level;
994 CONST CHAR *Format;
995 va_dcl
996 #endif
997 {
998 	/* Error! Write to console and/or logfile. */
999 
1000 	CHAR msg[MAX_LOG_MSG_LEN];
1001 	va_list ap;
1002 
1003 	assert( Format != NULL );
1004 
1005 #ifdef PROTOTYPES
1006 	va_start( ap, Format );
1007 #else
1008 	va_start( ap );
1009 #endif
1010 	vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
1011 	va_end( ap );
1012 	
1013 	/* During "normal operations" the log functions of the daemon should
1014 	 * be used, but during testing of the configuration file, all messages
1015 	 * should go directly to the console: */
1016 	if( Use_Log ) Log( Level, "%s", msg );
1017 	else puts( msg );
1018 } /* Config_Error */
1019 
1020 
1021 LOCAL VOID
1022 Init_Server_Struct( CONF_SERVER *Server )
1023 {
1024 	/* Initialize server configuration structur to default values */
1025 
1026 	assert( Server != NULL );
1027 
1028 	memset( Server, 0, sizeof (CONF_SERVER) );
1029 
1030 	Server->group = NONE;
1031 	Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
1032 
1033 	if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
1034 
1035 	Server->conn_id = NONE;
1036 } /* Init_Server_Struct */
1037 
1038 
1039 /* -eof- */