Convert CONN_ID and Conf_MaxConnections to "int" datatype
[ngircd-alex.git] / src / ngircd / conf.c
1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
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
12 #include "portab.h"
13
14 /**
15  * @file
16  * Configuration management (reading, parsing & validation)
17  */
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 "array.h"
42 #include "ngircd.h"
43 #include "conn.h"
44 #include "channel.h"
45 #include "defines.h"
46 #include "log.h"
47 #include "match.h"
48 #include "tool.h"
49
50 #include "exp.h"
51 #include "conf.h"
52
53
54 static bool Use_Log = true, Using_MotdFile = true;
55 static CONF_SERVER New_Server;
56 static int New_Server_Idx;
57
58 static char Conf_MotdFile[FNAME_LEN];
59
60 static void Set_Defaults PARAMS(( bool InitServers ));
61 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
62 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
63
64 static void Handle_GLOBAL PARAMS(( int Line, char *Var, char *Arg ));
65 static void Handle_LIMITS PARAMS(( int Line, char *Var, char *Arg ));
66 static void Handle_OPTIONS PARAMS(( int Line, char *Var, char *Arg ));
67 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
68 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
69 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
70
71 static void Config_Error PARAMS(( const int Level, const char *Format, ... ));
72
73 static void Config_Error_NaN PARAMS(( const int LINE, const char *Value ));
74 static void Config_Error_Section PARAMS(( const int Line, const char *Item,
75                                           const char *Section ));
76 static void Config_Error_TooLong PARAMS(( const int LINE, const char *Value ));
77
78 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
79
80
81 #ifdef WANT_IPV6
82 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
83 #else
84 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
85 #endif
86
87
88 #ifdef SSL_SUPPORT
89
90 static void Handle_SSL PARAMS(( int Line, char *Var, char *Ark ));
91
92 struct SSLOptions Conf_SSLOptions;
93
94 /**
95  * Initialize SSL configuration.
96  */
97 static void
98 ConfSSL_Init(void)
99 {
100         free(Conf_SSLOptions.KeyFile);
101         Conf_SSLOptions.KeyFile = NULL;
102
103         free(Conf_SSLOptions.CertFile);
104         Conf_SSLOptions.CertFile = NULL;
105
106         free(Conf_SSLOptions.DHFile);
107         Conf_SSLOptions.DHFile = NULL;
108         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
109 }
110
111 /**
112  * Make sure that a configured file is readable.
113  *
114  * Currently, this function is only used for SSL-related options ...
115  *
116  * @param Var Configuration variable
117  * @param Filename Configured filename
118  */
119 static void
120 CheckFileReadable(const char *Var, const char *Filename)
121 {
122         FILE *fp;
123
124         if (!Filename)
125                 return;
126
127         fp = fopen(Filename, "r");
128         if (fp)
129                 fclose(fp);
130         else
131                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
132                              Filename, Var, strerror(errno));
133 }
134
135 #endif
136
137
138 /**
139  * Duplicate string and warn on errors.
140  *
141  * @returns Pointer to string on success, NULL otherwise.
142  */
143 static char *
144 strdup_warn(const char *str)
145 {
146         char *ptr = strdup(str);
147         if (!ptr)
148                 Config_Error(LOG_ERR,
149                              "Could not allocate memory for string: %s", str);
150         return ptr;
151 }
152
153 /**
154  * Output a comma separated list of ports (integer values).
155  */
156 static void
157 ports_puts(array *a)
158 {
159         size_t len;
160         UINT16 *ports;
161         len = array_length(a, sizeof(UINT16));
162         if (len--) {
163                 ports = (UINT16*) array_start(a);
164                 printf("%u", (unsigned int) *ports);
165                 while (len--) {
166                         ports++;
167                         printf(", %u", (unsigned int) *ports);
168                 }
169         }
170         putc('\n', stdout);
171 }
172
173 /**
174  * Parse a comma separated string into an array of port numbers (integers).
175  */
176 static void
177 ports_parse(array *a, int Line, char *Arg)
178 {
179         char *ptr;
180         int port;
181         UINT16 port16;
182
183         array_trunc(a);
184
185         ptr = strtok( Arg, "," );
186         while (ptr) {
187                 ngt_TrimStr(ptr);
188                 port = atoi(ptr);
189                 if (port > 0 && port < 0xFFFF) {
190                         port16 = (UINT16) port;
191                         if (!array_catb(a, (char*)&port16, sizeof port16))
192                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
193                                                         NGIRCd_ConfFile, Line, port, strerror(errno));
194                 } else {
195                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
196                                                                         NGIRCd_ConfFile, Line, port );
197                 }
198
199                 ptr = strtok( NULL, "," );
200         }
201 }
202
203 /**
204  * Initialize configuration module.
205  */
206 GLOBAL void
207 Conf_Init( void )
208 {
209         Read_Config(false, true);
210         Validate_Config(false, false);
211 }
212
213 /**
214  * "Rehash" (reload) server configuration.
215  *
216  * @returns true if configuration has been re-read, false on errors.
217  */
218 GLOBAL bool
219 Conf_Rehash( void )
220 {
221         if (!Read_Config(false, false))
222                 return false;
223         Validate_Config(false, true);
224
225         /* Update CLIENT structure of local server */
226         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
227         return true;
228 }
229
230 /**
231  * Output a boolean value as "yes/no" string.
232  */
233 static const char*
234 yesno_to_str(int boolean_value)
235 {
236         if (boolean_value)
237                 return "yes";
238         return "no";
239 }
240
241 /**
242  * Free all IRC operator configuration structures.
243  */
244 static void
245 opers_free(void)
246 {
247         struct Conf_Oper *op;
248         size_t len;
249
250         len = array_length(&Conf_Opers, sizeof(*op));
251         op = array_start(&Conf_Opers);
252         while (len--) {
253                 free(op->mask);
254                 op++;
255         }
256         array_free(&Conf_Opers);
257 }
258
259 /**
260  * Output all IRC operator configuration structures.
261  */
262 static void
263 opers_puts(void)
264 {
265         struct Conf_Oper *op;
266         size_t count, i;
267
268         count = array_length(&Conf_Opers, sizeof(*op));
269         op = array_start(&Conf_Opers);
270         for (i = 0; i < count; i++, op++) {
271                 if (!op->name[0])
272                         continue;
273
274                 puts("[OPERATOR]");
275                 printf("  Name = %s\n", op->name);
276                 printf("  Password = %s\n", op->pwd);
277                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
278         }
279 }
280
281 /**
282  * Read configuration, validate and output it.
283  *
284  * This function waits for a keypress of the user when stdin/stdout are valid
285  * tty's ("you can read our nice message and we can read in your keypress").
286  *
287  * @return      0 on succes, 1 on failure(s); therefore the result code can
288  *              directly be used by exit() when running "ngircd --configtest".
289  */
290 GLOBAL int
291 Conf_Test( void )
292 {
293         struct passwd *pwd;
294         struct group *grp;
295         unsigned int i;
296         bool config_valid;
297         size_t predef_channel_count;
298         struct Conf_Channel *predef_chan;
299
300         Use_Log = false;
301
302         if (!Read_Config(true, true))
303                 return 1;
304
305         config_valid = Validate_Config(true, false);
306
307         /* Valid tty? */
308         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
309                 puts("OK, press enter to see a dump of your server configuration ...");
310                 getchar();
311         } else
312                 puts("Ok, dump of your server configuration follows:\n");
313
314         puts("[GLOBAL]");
315         printf("  Name = %s\n", Conf_ServerName);
316         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
317         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
318         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
319         printf("  Info = %s\n", Conf_ServerInfo);
320         printf("  Listen = %s\n", Conf_ListenAddress);
321         if (Using_MotdFile) {
322                 printf("  MotdFile = %s\n", Conf_MotdFile);
323                 printf("  MotdPhrase =\n");
324         } else {
325                 printf("  MotdFile = \n");
326                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
327                        ? (const char*) array_start(&Conf_Motd) : "");
328         }
329 #ifndef PAM
330         printf("  Password = %s\n", Conf_ServerPwd);
331 #endif
332         printf("  PidFile = %s\n", Conf_PidFile);
333         printf("  Ports = ");
334         ports_puts(&Conf_ListenPorts);
335         grp = getgrgid(Conf_GID);
336         if (grp)
337                 printf("  ServerGID = %s\n", grp->gr_name);
338         else
339                 printf("  ServerGID = %ld\n", (long)Conf_GID);
340         pwd = getpwuid(Conf_UID);
341         if (pwd)
342                 printf("  ServerUID = %s\n", pwd->pw_name);
343         else
344                 printf("  ServerUID = %ld\n", (long)Conf_UID);
345         puts("");
346
347         puts("[LIMITS]");
348         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
349         printf("  MaxConnections = %d\n", Conf_MaxConnections);
350         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
351         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
352         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
353         printf("  PingTimeout = %d\n", Conf_PingTimeout);
354         printf("  PongTimeout = %d\n", Conf_PongTimeout);
355         puts("");
356
357         puts("[OPTIONS]");
358         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
359         printf("  ChrootDir = %s\n", Conf_Chroot);
360         printf("  CloakHost = %s\n", Conf_CloakHost);
361         printf("  CloakHostModeX = %s\n", Conf_CloakHostModeX);
362         printf("  CloakHostSalt = %s\n", Conf_CloakHostSalt);
363         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
364 #ifdef WANT_IPV6
365         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
366         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
367 #endif
368         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
369 #ifdef IDENT
370         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
371 #endif
372         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
373         printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
374         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
375         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
376 #ifdef PAM
377         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
378         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
379 #endif
380         printf("  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
381 #ifndef STRICT_RFC
382         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
383 #endif
384         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
385 #ifdef SYSLOG
386         printf("  SyslogFacility = %s\n",
387                ngt_SyslogFacilityName(Conf_SyslogFacility));
388 #endif
389         printf("  WebircPassword = %s\n", Conf_WebircPwd);
390         puts("");
391
392 #ifdef SSL_SUPPORT
393         puts("[SSL]");
394         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
395                                         ? Conf_SSLOptions.CertFile : "");
396         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
397                                         ? Conf_SSLOptions.DHFile : "");
398         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
399                                         ? Conf_SSLOptions.KeyFile : "");
400         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
401                 puts("  KeyFilePassword = <secret>");
402         else
403                 puts("  KeyFilePassword = ");
404         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
405         printf("  Ports = ");
406         ports_puts(&Conf_SSLOptions.ListenPorts);
407         puts("");
408 #endif
409
410         opers_puts();
411
412         for( i = 0; i < MAX_SERVERS; i++ ) {
413                 if( ! Conf_Server[i].name[0] ) continue;
414
415                 /* Valid "Server" section */
416                 puts( "[SERVER]" );
417                 printf( "  Name = %s\n", Conf_Server[i].name );
418                 printf( "  Host = %s\n", Conf_Server[i].host );
419                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
420 #ifdef SSL_SUPPORT
421                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
422 #endif
423                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
424                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
425                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
426                 printf( "  Group = %d\n", Conf_Server[i].group );
427                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
428         }
429
430         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
431         predef_chan = array_start(&Conf_Channels);
432
433         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
434                 if (!predef_chan->name[0])
435                         continue;
436
437                 /* Valid "Channel" section */
438                 puts( "[CHANNEL]" );
439                 printf("  Name = %s\n", predef_chan->name);
440                 printf("  Modes = %s\n", predef_chan->modes);
441                 printf("  Key = %s\n", predef_chan->key);
442                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
443                 printf("  Topic = %s\n", predef_chan->topic);
444                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
445         }
446
447         return (config_valid ? 0 : 1);
448 }
449
450 /**
451  * Remove connection information from configured server.
452  *
453  * If the server is set as "once", delete it from our configuration;
454  * otherwise set the time for the next connection attempt.
455  *
456  * Non-server connections will be silently ignored.
457  */
458 GLOBAL void
459 Conf_UnsetServer( CONN_ID Idx )
460 {
461         int i;
462         time_t t;
463
464         /* Check all our configured servers */
465         for( i = 0; i < MAX_SERVERS; i++ ) {
466                 if( Conf_Server[i].conn_id != Idx ) continue;
467
468                 /* Gotcha! Mark server configuration as "unused": */
469                 Conf_Server[i].conn_id = NONE;
470
471                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
472                         /* Delete configuration here */
473                         Init_Server_Struct( &Conf_Server[i] );
474                 } else {
475                         /* Set time for next connect attempt */
476                         t = time(NULL);
477                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
478                                 /* The connection has been "long", so we don't
479                                  * require the next attempt to be delayed. */
480                                 Conf_Server[i].lasttry =
481                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
482                         } else
483                                 Conf_Server[i].lasttry = t;
484                 }
485         }
486 }
487
488 /**
489  * Set connection information for specified configured server.
490  */
491 GLOBAL void
492 Conf_SetServer( int ConfServer, CONN_ID Idx )
493 {
494         assert( ConfServer > NONE );
495         assert( Idx > NONE );
496
497         if (Conf_Server[ConfServer].conn_id > NONE &&
498             Conf_Server[ConfServer].conn_id != Idx) {
499                 Log(LOG_ALERT,
500                         "Trying to update connection index for already registered server \"%s\": %d/%d - ignored.",
501                         Conf_Server[ConfServer].name,
502                         Conf_Server[ConfServer].conn_id, Idx);
503                 return;
504         }
505         Conf_Server[ConfServer].conn_id = Idx;
506 }
507
508 /**
509  * Get index of server in configuration structure.
510  */
511 GLOBAL int
512 Conf_GetServer( CONN_ID Idx )
513 {
514         int i = 0;
515
516         assert( Idx > NONE );
517
518         for( i = 0; i < MAX_SERVERS; i++ ) {
519                 if( Conf_Server[i].conn_id == Idx ) return i;
520         }
521         return NONE;
522 }
523
524 /**
525  * Enable a server by name and adjust its port number.
526  *
527  * @returns     true if a server has been enabled and now has a valid port
528  *              number and host name for outgoing connections.
529  */
530 GLOBAL bool
531 Conf_EnableServer( const char *Name, UINT16 Port )
532 {
533         int i;
534
535         assert( Name != NULL );
536         for( i = 0; i < MAX_SERVERS; i++ ) {
537                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
538                         /* Gotcha! Set port and enable server: */
539                         Conf_Server[i].port = Port;
540                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
541                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
542                 }
543         }
544         return false;
545 }
546
547 /**
548  * Enable a server by name.
549  *
550  * The server is only usable as outgoing server, if it has set a valid port
551  * number for outgoing connections!
552  * If not, you have to use Conf_EnableServer() function to make it available.
553  *
554  * @returns     true if a server has been enabled; false otherwise.
555  */
556 GLOBAL bool
557 Conf_EnablePassiveServer(const char *Name)
558 {
559         int i;
560
561         assert( Name != NULL );
562         for (i = 0; i < MAX_SERVERS; i++) {
563                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
564                     && (Conf_Server[i].port > 0)) {
565                         /* BINGO! Enable server */
566                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
567                         return true;
568                 }
569         }
570         return false;
571 }
572
573 /**
574  * Disable a server by name.
575  * An already established connection will be disconnected.
576  *
577  * @returns     true if a server was found and has been disabled.
578  */
579 GLOBAL bool
580 Conf_DisableServer( const char *Name )
581 {
582         int i;
583
584         assert( Name != NULL );
585         for( i = 0; i < MAX_SERVERS; i++ ) {
586                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
587                         /* Gotcha! Disable and disconnect server: */
588                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
589                         if( Conf_Server[i].conn_id > NONE )
590                                 Conn_Close(Conf_Server[i].conn_id, NULL,
591                                            "Server link terminated on operator request",
592                                            true);
593                         return true;
594                 }
595         }
596         return false;
597 }
598
599 /**
600  * Add a new remote server to our configuration.
601  *
602  * @param Name          Name of the new server.
603  * @param Port          Port number to connect to or 0 for incoming connections.
604  * @param Host          Host name to connect to.
605  * @param MyPwd         Password that will be sent to the peer.
606  * @param PeerPwd       Password that must be received from the peer.
607  * @returns             true if the new server has been added; false otherwise.
608  */
609 GLOBAL bool
610 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
611                const char *MyPwd, const char *PeerPwd)
612 {
613         int i;
614
615         assert( Name != NULL );
616         assert( Host != NULL );
617         assert( MyPwd != NULL );
618         assert( PeerPwd != NULL );
619
620         /* Search unused item in server configuration structure */
621         for( i = 0; i < MAX_SERVERS; i++ ) {
622                 /* Is this item used? */
623                 if( ! Conf_Server[i].name[0] ) break;
624         }
625         if( i >= MAX_SERVERS ) return false;
626
627         Init_Server_Struct( &Conf_Server[i] );
628         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
629         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
630         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
631         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
632         Conf_Server[i].port = Port;
633         Conf_Server[i].flags = CONF_SFLAG_ONCE;
634
635         return true;
636 }
637
638 /**
639  * Check if the given nick name is reserved for services on a particular server.
640  *
641  * @param ConfServer The server index to check.
642  * @param Nick The nick name to check.
643  * @returns true if the given nick name belongs to an "IRC service".
644  */
645 GLOBAL bool
646 Conf_NickIsService(int ConfServer, const char *Nick)
647 {
648         assert (ConfServer >= 0);
649         assert (ConfServer < MAX_SERVERS);
650
651         return MatchCaseInsensitiveList(Conf_Server[ConfServer].svs_mask,
652                                         Nick, ",");
653 }
654
655 /**
656  * Check if the given nick name is blocked for "normal client" use.
657  *
658  * @param ConfServer The server index or NONE to check all configured servers.
659  * @param Nick The nick name to check.
660  * @returns true if the given nick name belongs to an "IRC service".
661  */
662 GLOBAL bool
663 Conf_NickIsBlocked(const char *Nick)
664 {
665         int i;
666
667         for(i = 0; i < MAX_SERVERS; i++) {
668                 if (!Conf_Server[i].name[0])
669                         continue;
670                 if (Conf_NickIsService(i, Nick))
671                         return true;
672         }
673         return false;
674 }
675
676 /**
677  * Initialize configuration settings with their default values.
678  */
679 static void
680 Set_Defaults(bool InitServers)
681 {
682         int i;
683         char random[RANDOM_SALT_LEN + 1];
684
685         /* Global */
686         strcpy(Conf_ServerName, "");
687         strcpy(Conf_ServerAdmin1, "");
688         strcpy(Conf_ServerAdmin2, "");
689         strcpy(Conf_ServerAdminMail, "");
690         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
691                  PACKAGE_NAME, PACKAGE_VERSION);
692         free(Conf_ListenAddress);
693         Conf_ListenAddress = NULL;
694         array_free(&Conf_Motd);
695         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
696         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
697         strcpy(Conf_ServerPwd, "");
698         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
699         Conf_UID = Conf_GID = 0;
700
701         /* Limits */
702         Conf_ConnectRetry = 60;
703         Conf_MaxConnections = 0;
704         Conf_MaxConnectionsIP = 5;
705         Conf_MaxJoins = 10;
706         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
707         Conf_PingTimeout = 120;
708         Conf_PongTimeout = 20;
709
710         /* Options */
711         Conf_AllowRemoteOper = false;
712 #ifndef STRICT_RFC
713         Conf_AuthPing = false;
714 #endif
715         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
716         strcpy(Conf_CloakHost, "");
717         strcpy(Conf_CloakHostModeX, "");
718         strcpy(Conf_CloakHostSalt, ngt_RandomStr(random, RANDOM_SALT_LEN));
719         Conf_CloakUserToNick = false;
720         Conf_ConnectIPv4 = true;
721 #ifdef WANT_IPV6
722         Conf_ConnectIPv6 = true;
723 #else
724         Conf_ConnectIPv6 = false;
725 #endif
726         Conf_DNS = true;
727 #ifdef IDENTAUTH
728         Conf_Ident = true;
729 #else
730         Conf_Ident = false;
731 #endif
732         Conf_MorePrivacy = false;
733         Conf_NoticeAuth = false;
734         Conf_OperCanMode = false;
735         Conf_OperServerMode = false;
736 #ifdef PAM
737         Conf_PAM = true;
738 #else
739         Conf_PAM = false;
740 #endif
741         Conf_PAMIsOptional = false;
742         Conf_PredefChannelsOnly = false;
743 #ifdef SYSLOG
744         Conf_ScrubCTCP = false;
745 #ifdef LOG_LOCAL5
746         Conf_SyslogFacility = LOG_LOCAL5;
747 #else
748         Conf_SyslogFacility = 0;
749 #endif
750 #endif
751
752         /* Initialize server configuration structures */
753         if (InitServers) {
754                 for (i = 0; i < MAX_SERVERS;
755                      Init_Server_Struct(&Conf_Server[i++]));
756         }
757 }
758
759 /**
760  * Get number of configured listening ports.
761  *
762  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
763  */
764 static bool
765 no_listenports(void)
766 {
767         size_t cnt = array_bytes(&Conf_ListenPorts);
768 #ifdef SSL_SUPPORT
769         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
770 #endif
771         return cnt == 0;
772 }
773
774 /**
775  * Read MOTD ("message of the day") file.
776  *
777  * @param filename      Name of the file to read.
778  */
779 static void
780 Read_Motd(const char *filename)
781 {
782         char line[127];
783         FILE *fp;
784
785         if (*filename == '\0')
786                 return;
787
788         fp = fopen(filename, "r");
789         if (!fp) {
790                 Config_Error(LOG_WARNING, "Can't read MOTD file \"%s\": %s",
791                                         filename, strerror(errno));
792                 return;
793         }
794
795         array_free(&Conf_Motd);
796         Using_MotdFile = true;
797
798         while (fgets(line, (int)sizeof line, fp)) {
799                 ngt_TrimLastChr( line, '\n');
800
801                 /* add text including \0 */
802                 if (!array_catb(&Conf_Motd, line, strlen(line) + 1)) {
803                         Log(LOG_WARNING, "Cannot add MOTD text: %s", strerror(errno));
804                         break;
805                 }
806         }
807         fclose(fp);
808 }
809
810 /**
811  * Read ngIRCd configuration file.
812  *
813  * Please note that this function uses exit(1) on fatal errors and therefore
814  * can result in ngIRCd terminating!
815  *
816  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
817  * @returns                     true when the configuration file has been read
818  *                              successfully; false otherwise.
819  */
820 static bool
821 Read_Config(bool TestOnly, bool IsStarting)
822 {
823         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
824         const UINT16 defaultport = 6667;
825         int line, i, n;
826         size_t count;
827         FILE *fd;
828
829         /* Open configuration file */
830         fd = fopen( NGIRCd_ConfFile, "r" );
831         if( ! fd ) {
832                 /* No configuration file found! */
833                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
834                                         NGIRCd_ConfFile, strerror( errno ));
835                 if (!IsStarting)
836                         return false;
837                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
838                 exit( 1 );
839         }
840
841         opers_free();
842         Set_Defaults(IsStarting);
843
844         if (TestOnly)
845                 Config_Error(LOG_INFO,
846                              "Reading configuration from \"%s\" ...",
847                              NGIRCd_ConfFile );
848
849         /* Clean up server configuration structure: mark all already
850          * configured servers as "once" so that they are deleted
851          * after the next disconnect and delete all unused servers.
852          * And delete all servers which are "duplicates" of servers
853          * that are already marked as "once" (such servers have been
854          * created by the last rehash but are now useless). */
855         for( i = 0; i < MAX_SERVERS; i++ ) {
856                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
857                 else {
858                         /* This structure is in use ... */
859                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
860                                 /* Check for duplicates */
861                                 for( n = 0; n < MAX_SERVERS; n++ ) {
862                                         if( n == i ) continue;
863
864                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
865                                                 Init_Server_Struct( &Conf_Server[n] );
866 #ifdef DEBUG
867                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
868                                                                                                 n, i );
869 #endif
870                                         }
871                                 }
872                         } else {
873                                 /* Mark server as "once" */
874                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
875                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
876                         }
877                 }
878         }
879
880         /* Initialize variables */
881         line = 0;
882         strcpy( section, "" );
883         Init_Server_Struct( &New_Server );
884         New_Server_Idx = NONE;
885 #ifdef SSL_SUPPORT
886         ConfSSL_Init();
887 #endif
888         /* Read configuration file */
889         while( true ) {
890                 if( ! fgets( str, LINE_LEN, fd )) break;
891                 ngt_TrimStr( str );
892                 line++;
893
894                 /* Skip comments and empty lines */
895                 if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
896
897                 /* Is this the beginning of a new section? */
898                 if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' )) {
899                         strlcpy( section, str, sizeof( section ));
900                         if (strcasecmp(section, "[GLOBAL]") == 0
901                             || strcasecmp(section, "[LIMITS]") == 0
902                             || strcasecmp(section, "[OPTIONS]") == 0
903 #ifdef SSL_SUPPORT
904                             || strcasecmp(section, "[SSL]") == 0
905 #endif
906                             )
907                                 continue;
908
909                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
910                                 /* Check if there is already a server to add */
911                                 if( New_Server.name[0] ) {
912                                         /* Copy data to "real" server structure */
913                                         assert( New_Server_Idx > NONE );
914                                         Conf_Server[New_Server_Idx] = New_Server;
915                                 }
916
917                                 /* Re-init structure for new server */
918                                 Init_Server_Struct( &New_Server );
919
920                                 /* Search unused item in server configuration structure */
921                                 for( i = 0; i < MAX_SERVERS; i++ ) {
922                                         /* Is this item used? */
923                                         if( ! Conf_Server[i].name[0] ) break;
924                                 }
925                                 if( i >= MAX_SERVERS ) {
926                                         /* Oops, no free item found! */
927                                         Config_Error( LOG_ERR, "Too many servers configured." );
928                                         New_Server_Idx = NONE;
929                                 }
930                                 else New_Server_Idx = i;
931                                 continue;
932                         }
933
934                         if (strcasecmp(section, "[CHANNEL]") == 0) {
935                                 count = array_length(&Conf_Channels,
936                                                      sizeof(struct Conf_Channel));
937                                 if (!array_alloc(&Conf_Channels,
938                                                  sizeof(struct Conf_Channel),
939                                                  count)) {
940                                         Config_Error(LOG_ERR,
941                                                      "Could not allocate memory for new operator (line %d)",
942                                                      line);
943                                 }
944                                 continue;
945                         }
946
947                         if (strcasecmp(section, "[OPERATOR]") == 0) {
948                                 count = array_length(&Conf_Opers,
949                                                      sizeof(struct Conf_Oper));
950                                 if (!array_alloc(&Conf_Opers,
951                                                  sizeof(struct Conf_Oper),
952                                                  count)) {
953                                         Config_Error(LOG_ERR,
954                                                      "Could not allocate memory for new channel (line &d)",
955                                                      line);
956                                 }
957                                 continue;
958                         }
959
960                         Config_Error(LOG_ERR,
961                                      "%s, line %d: Unknown section \"%s\"!",
962                                      NGIRCd_ConfFile, line, section);
963                         section[0] = 0x1;
964                 }
965                 if( section[0] == 0x1 ) continue;
966
967                 /* Split line into variable name and parameters */
968                 ptr = strchr( str, '=' );
969                 if( ! ptr ) {
970                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
971                         continue;
972                 }
973                 *ptr = '\0';
974                 var = str; ngt_TrimStr( var );
975                 arg = ptr + 1; ngt_TrimStr( arg );
976
977                 if(strcasecmp(section, "[GLOBAL]") == 0)
978                         Handle_GLOBAL(line, var, arg);
979                 else if(strcasecmp(section, "[LIMITS]") == 0)
980                         Handle_LIMITS(line, var, arg);
981                 else if(strcasecmp(section, "[OPTIONS]") == 0)
982                         Handle_OPTIONS(line, var, arg);
983 #ifdef SSL_SUPPORT
984                 else if(strcasecmp(section, "[SSL]") == 0)
985                         Handle_SSL(line, var, arg);
986 #endif
987                 else if(strcasecmp(section, "[OPERATOR]") == 0)
988                         Handle_OPERATOR(line, var, arg);
989                 else if(strcasecmp(section, "[SERVER]") == 0)
990                         Handle_SERVER(line, var, arg);
991                 else if(strcasecmp(section, "[CHANNEL]") == 0)
992                         Handle_CHANNEL(line, var, arg);
993                 else
994                         Config_Error(LOG_ERR,
995                                      "%s, line %d: Variable \"%s\" outside section!",
996                                      NGIRCd_ConfFile, line, var);
997         }
998
999         /* Close configuration file */
1000         fclose( fd );
1001
1002         /* Check if there is still a server to add */
1003         if( New_Server.name[0] ) {
1004                 /* Copy data to "real" server structure */
1005                 assert( New_Server_Idx > NONE );
1006                 Conf_Server[New_Server_Idx] = New_Server;
1007         }
1008
1009         /* not a single listening port? Add default. */
1010         if (no_listenports() &&
1011                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
1012         {
1013                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
1014                                         (unsigned int) defaultport, strerror(errno));
1015
1016                 exit(1);
1017         }
1018
1019         if (!Conf_ListenAddress)
1020                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
1021
1022         if (!Conf_ListenAddress) {
1023                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1024                 exit(1);
1025         }
1026
1027         /* No MOTD phrase configured? (re)try motd file. */
1028         if (array_bytes(&Conf_Motd) == 0)
1029                 Read_Motd(Conf_MotdFile);
1030
1031 #ifdef SSL_SUPPORT
1032         /* Make sure that all SSL-related files are readable */
1033         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1034         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1035         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1036 #endif
1037
1038         return true;
1039 }
1040
1041 /**
1042  * Check whether a string argument is "true" or "false".
1043  *
1044  * @param Arg   Input string.
1045  * @returns     true if the input string has been parsed as "yes", "true"
1046  *              (case insensitive) or a non-zero integer value.
1047  */
1048 static bool
1049 Check_ArgIsTrue(const char *Arg)
1050 {
1051         if (strcasecmp(Arg, "yes") == 0)
1052                 return true;
1053         if (strcasecmp(Arg, "true") == 0)
1054                 return true;
1055         if (atoi(Arg) != 0)
1056                 return true;
1057
1058         return false;
1059 }
1060
1061 /**
1062  * Handle setting of "MaxNickLength".
1063  *
1064  * @param Line  Line number in configuration file.
1065  * @raram Arg   Input string.
1066  * @returns     New configured maximum nick name length.
1067  */
1068 static unsigned int
1069 Handle_MaxNickLength(int Line, const char *Arg)
1070 {
1071         unsigned new;
1072
1073         new = (unsigned) atoi(Arg) + 1;
1074         if (new > CLIENT_NICK_LEN) {
1075                 Config_Error(LOG_WARNING,
1076                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1077                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
1078                 return CLIENT_NICK_LEN;
1079         }
1080         if (new < 2) {
1081                 Config_Error(LOG_WARNING,
1082                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1083                              NGIRCd_ConfFile, Line);
1084                 return 2;
1085         }
1086         return new;
1087 }
1088
1089 /**
1090  * Output a warning messages if IDENT is configured but not compiled in.
1091  */
1092 static void
1093 WarnIdent(int UNUSED Line)
1094 {
1095 #ifndef IDENTAUTH
1096         if (Conf_Ident) {
1097                 /* user has enabled ident lookups explicitly, but ... */
1098                 Config_Error(LOG_WARNING,
1099                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1100                         NGIRCd_ConfFile, Line);
1101         }
1102 #endif
1103 }
1104
1105 /**
1106  * Output a warning messages if IPv6 is configured but not compiled in.
1107  */
1108 static void
1109 WarnIPv6(int UNUSED Line)
1110 {
1111 #ifndef WANT_IPV6
1112         if (Conf_ConnectIPv6) {
1113                 /* user has enabled IPv6 explicitly, but ... */
1114                 Config_Error(LOG_WARNING,
1115                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1116                         NGIRCd_ConfFile, Line);
1117         }
1118 #endif
1119 }
1120
1121 /**
1122  * Output a warning messages if PAM is configured but not compiled in.
1123  */
1124 static void
1125 WarnPAM(int UNUSED Line)
1126 {
1127 #ifndef PAM
1128         if (Conf_PAM) {
1129                 Config_Error(LOG_WARNING,
1130                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1131                         NGIRCd_ConfFile, Line);
1132         }
1133 #endif
1134 }
1135
1136 /**
1137  * Handle legacy "NoXXX" options in [GLOBAL] section.
1138  *
1139  * TODO: This function and support for "NoXXX" could be removed starting
1140  * with ngIRCd release 19 (one release after marking it "deprecated").
1141  *
1142  * @param Var   Variable name.
1143  * @param Arg   Argument string.
1144  * @returns     true if a NoXXX option has been processed; false otherwise.
1145  */
1146 static bool
1147 CheckLegacyNoOption(const char *Var, const char *Arg)
1148 {
1149         if(strcasecmp(Var, "NoDNS") == 0) {
1150                 Conf_DNS = !Check_ArgIsTrue( Arg );
1151                 return true;
1152         }
1153         if (strcasecmp(Var, "NoIdent") == 0) {
1154                 Conf_Ident = !Check_ArgIsTrue(Arg);
1155                 return true;
1156         }
1157         if(strcasecmp(Var, "NoPAM") == 0) {
1158                 Conf_PAM = !Check_ArgIsTrue(Arg);
1159                 return true;
1160         }
1161         return false;
1162 }
1163
1164 /**
1165  * Handle deprecated legacy options in [GLOBAL] section.
1166  *
1167  * TODO: This function and support for these options in the [Global] section
1168  * could be removed starting with ngIRCd release 19 (one release after
1169  * marking it "deprecated").
1170  *
1171  * @param Var   Variable name.
1172  * @param Arg   Argument string.
1173  * @returns     true if a legacy option has been processed; false otherwise.
1174  */
1175 static const char*
1176 CheckLegacyGlobalOption(int Line, char *Var, char *Arg)
1177 {
1178         if (strcasecmp(Var, "AllowRemoteOper") == 0
1179             || strcasecmp(Var, "ChrootDir") == 0
1180             || strcasecmp(Var, "ConnectIPv4") == 0
1181             || strcasecmp(Var, "ConnectIPv6") == 0
1182             || strcasecmp(Var, "OperCanUseMode") == 0
1183             || strcasecmp(Var, "OperServerMode") == 0
1184             || strcasecmp(Var, "PredefChannelsOnly") == 0
1185             || strcasecmp(Var, "SyslogFacility") == 0
1186             || strcasecmp(Var, "WebircPassword") == 0) {
1187                 Handle_OPTIONS(Line, Var, Arg);
1188                 return "[Options]";
1189         }
1190         if (strcasecmp(Var, "ConnectRetry") == 0
1191             || strcasecmp(Var, "MaxConnections") == 0
1192             || strcasecmp(Var, "MaxConnectionsIP") == 0
1193             || strcasecmp(Var, "MaxJoins") == 0
1194             || strcasecmp(Var, "MaxNickLength") == 0
1195             || strcasecmp(Var, "PingTimeout") == 0
1196             || strcasecmp(Var, "PongTimeout") == 0) {
1197                 Handle_LIMITS(Line, Var, Arg);
1198                 return "[Limits]";
1199         }
1200 #ifdef SSL_SUPPORT
1201         if (strcasecmp(Var, "SSLCertFile") == 0
1202             || strcasecmp(Var, "SSLDHFile") == 0
1203             || strcasecmp(Var, "SSLKeyFile") == 0
1204             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1205             || strcasecmp(Var, "SSLPorts") == 0) {
1206                 Handle_SSL(Line, Var + 3, Arg);
1207                 return "[SSL]";
1208         }
1209 #endif
1210
1211         return NULL;
1212 }
1213
1214 /**
1215  * Strip "no" prefix of a string.
1216  *
1217  * TODO: This function and support for "NoXXX" should be removed starting
1218  * with ngIRCd release 19! (One release after marking it "deprecated").
1219  *
1220  * @param str   Pointer to input string starting with "no".
1221  * @returns     New pointer to string without "no" prefix.
1222  */
1223 static const char *
1224 NoNo(const char *str)
1225 {
1226         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1227         return str + 2;
1228 }
1229
1230 /**
1231  * Invert "boolean" string.
1232  *
1233  * TODO: This function and support for "NoXXX" should be removed starting
1234  * with ngIRCd release 19! (One release after marking it "deprecated").
1235  *
1236  * @param arg   "Boolean" input string.
1237  * @returns     Pointer to inverted "boolean string".
1238  */
1239 static const char *
1240 InvertArg(const char *arg)
1241 {
1242         return yesno_to_str(!Check_ArgIsTrue(arg));
1243 }
1244
1245 /**
1246  * Handle variable in [Global] configuration section.
1247  *
1248  * @param Line  Line numer in configuration file.
1249  * @param Var   Variable name.
1250  * @param Arg   Variable argument.
1251  */
1252 static void
1253 Handle_GLOBAL( int Line, char *Var, char *Arg )
1254 {
1255         struct passwd *pwd;
1256         struct group *grp;
1257         size_t len;
1258         const char *section;
1259
1260         assert(Line > 0);
1261         assert(Var != NULL);
1262         assert(Arg != NULL);
1263
1264         if (strcasecmp(Var, "Name") == 0) {
1265                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1266                 if (len >= sizeof(Conf_ServerName))
1267                         Config_Error_TooLong(Line, Var);
1268                 return;
1269         }
1270         if (strcasecmp(Var, "AdminInfo1") == 0) {
1271                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1272                 if (len >= sizeof(Conf_ServerAdmin1))
1273                         Config_Error_TooLong(Line, Var);
1274                 return;
1275         }
1276         if (strcasecmp(Var, "AdminInfo2") == 0) {
1277                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1278                 if (len >= sizeof(Conf_ServerAdmin2))
1279                         Config_Error_TooLong(Line, Var);
1280                 return;
1281         }
1282         if (strcasecmp(Var, "AdminEMail") == 0) {
1283                 len = strlcpy(Conf_ServerAdminMail, Arg,
1284                         sizeof(Conf_ServerAdminMail));
1285                 if (len >= sizeof(Conf_ServerAdminMail))
1286                         Config_Error_TooLong(Line, Var);
1287                 return;
1288         }
1289         if (strcasecmp(Var, "Info") == 0) {
1290                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1291                 if (len >= sizeof(Conf_ServerInfo))
1292                         Config_Error_TooLong(Line, Var);
1293                 return;
1294         }
1295         if (strcasecmp(Var, "Listen") == 0) {
1296                 if (Conf_ListenAddress) {
1297                         Config_Error(LOG_ERR,
1298                                      "Multiple Listen= options, ignoring: %s",
1299                                      Arg);
1300                         return;
1301                 }
1302                 Conf_ListenAddress = strdup_warn(Arg);
1303                 /* If allocation fails, we're in trouble: we cannot ignore the
1304                  * error -- otherwise ngircd would listen on all interfaces. */
1305                 if (!Conf_ListenAddress) {
1306                         Config_Error(LOG_ALERT,
1307                                      "%s exiting due to fatal errors!",
1308                                      PACKAGE_NAME);
1309                         exit(1);
1310                 }
1311                 return;
1312         }
1313         if (strcasecmp(Var, "MotdFile") == 0) {
1314                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1315                 if (len >= sizeof(Conf_MotdFile))
1316                         Config_Error_TooLong(Line, Var);
1317                 return;
1318         }
1319         if (strcasecmp(Var, "MotdPhrase") == 0) {
1320                 len = strlen(Arg);
1321                 if (len == 0)
1322                         return;
1323                 if (len >= LINE_LEN) {
1324                         Config_Error_TooLong(Line, Var);
1325                         return;
1326                 }
1327                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1328                         Config_Error(LOG_WARNING,
1329                                      "%s, line %d: Could not append MotdPhrase: %s",
1330                                      NGIRCd_ConfFile, Line, strerror(errno));
1331                 Using_MotdFile = false;
1332                 return;
1333         }
1334         if(strcasecmp(Var, "Password") == 0) {
1335                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1336                 if (len >= sizeof(Conf_ServerPwd))
1337                         Config_Error_TooLong(Line, Var);
1338                 return;
1339         }
1340         if (strcasecmp(Var, "PidFile") == 0) {
1341                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1342                 if (len >= sizeof(Conf_PidFile))
1343                         Config_Error_TooLong(Line, Var);
1344                 return;
1345         }
1346         if (strcasecmp(Var, "Ports") == 0) {
1347                 ports_parse(&Conf_ListenPorts, Line, Arg);
1348                 return;
1349         }
1350         if (strcasecmp(Var, "ServerGID") == 0) {
1351                 grp = getgrnam(Arg);
1352                 if (grp)
1353                         Conf_GID = grp->gr_gid;
1354                 else {
1355                         Conf_GID = (unsigned int)atoi(Arg);
1356                         if (!Conf_GID && strcmp(Arg, "0"))
1357                                 Config_Error(LOG_WARNING,
1358                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1359                                              NGIRCd_ConfFile, Line, Var);
1360                 }
1361                 return;
1362         }
1363         if (strcasecmp(Var, "ServerUID") == 0) {
1364                 pwd = getpwnam(Arg);
1365                 if (pwd)
1366                         Conf_UID = pwd->pw_uid;
1367                 else {
1368                         Conf_UID = (unsigned int)atoi(Arg);
1369                         if (!Conf_UID && strcmp(Arg, "0"))
1370                                 Config_Error(LOG_WARNING,
1371                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1372                                              NGIRCd_ConfFile, Line, Var);
1373                 }
1374                 return;
1375         }
1376
1377         if (CheckLegacyNoOption(Var, Arg)) {
1378                 /* TODO: This function and support for "NoXXX" could be
1379                  * be removed starting with ngIRCd release 19 (one release
1380                  * after marking it "deprecated"). */
1381                 Config_Error(LOG_WARNING,
1382                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1383                              NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1384                 if (strcasecmp(Var, "NoIdent") == 0)
1385                         WarnIdent(Line);
1386                 else if (strcasecmp(Var, "NoPam") == 0)
1387                         WarnPAM(Line);
1388                 return;
1389         }
1390         if ((section = CheckLegacyGlobalOption(Line, Var, Arg))) {
1391                 /** TODO: This function and support for these options in the
1392                  * [Global] section could be removed starting with ngIRCd
1393                  * release 19 (one release after marking it "deprecated"). */
1394                 if (strncasecmp(Var, "SSL", 3) == 0) {
1395                         Config_Error(LOG_WARNING,
1396                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1397                                      NGIRCd_ConfFile, Line, Var, section,
1398                                      Var + 3);
1399                 } else {
1400                         Config_Error(LOG_WARNING,
1401                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1402                                      NGIRCd_ConfFile, Line, Var, section);
1403                 }
1404                 return;
1405         }
1406
1407         Config_Error_Section(Line, Var, "Global");
1408 }
1409
1410 /**
1411  * Handle variable in [Limits] configuration section.
1412  *
1413  * @param Line  Line numer in configuration file.
1414  * @param Var   Variable name.
1415  * @param Arg   Variable argument.
1416  */
1417 static void
1418 Handle_LIMITS(int Line, char *Var, char *Arg)
1419 {
1420         assert(Line > 0);
1421         assert(Var != NULL);
1422         assert(Arg != NULL);
1423
1424         if (strcasecmp(Var, "ConnectRetry") == 0) {
1425                 Conf_ConnectRetry = atoi(Arg);
1426                 if (Conf_ConnectRetry < 5) {
1427                         Config_Error(LOG_WARNING,
1428                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1429                                      NGIRCd_ConfFile, Line);
1430                         Conf_ConnectRetry = 5;
1431                 }
1432                 return;
1433         }
1434         if (strcasecmp(Var, "MaxConnections") == 0) {
1435                 Conf_MaxConnections = atoi(Arg);
1436                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1437                         Config_Error_NaN(Line, Var);
1438                 return;
1439         }
1440         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1441                 Conf_MaxConnectionsIP = atoi(Arg);
1442                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1443                         Config_Error_NaN(Line, Var);
1444                 return;
1445         }
1446         if (strcasecmp(Var, "MaxJoins") == 0) {
1447                 Conf_MaxJoins = atoi(Arg);
1448                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1449                         Config_Error_NaN(Line, Var);
1450                 return;
1451         }
1452         if (strcasecmp(Var, "MaxNickLength") == 0) {
1453                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1454                 return;
1455         }
1456         if (strcasecmp(Var, "PingTimeout") == 0) {
1457                 Conf_PingTimeout = atoi(Arg);
1458                 if (Conf_PingTimeout < 5) {
1459                         Config_Error(LOG_WARNING,
1460                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1461                                      NGIRCd_ConfFile, Line);
1462                         Conf_PingTimeout = 5;
1463                 }
1464                 return;
1465         }
1466         if (strcasecmp(Var, "PongTimeout") == 0) {
1467                 Conf_PongTimeout = atoi(Arg);
1468                 if (Conf_PongTimeout < 5) {
1469                         Config_Error(LOG_WARNING,
1470                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1471                                      NGIRCd_ConfFile, Line);
1472                         Conf_PongTimeout = 5;
1473                 }
1474                 return;
1475         }
1476
1477         Config_Error_Section(Line, Var, "Limits");
1478 }
1479
1480 /**
1481  * Handle variable in [Options] configuration section.
1482  *
1483  * @param Line  Line numer in configuration file.
1484  * @param Var   Variable name.
1485  * @param Arg   Variable argument.
1486  */
1487 static void
1488 Handle_OPTIONS(int Line, char *Var, char *Arg)
1489 {
1490         size_t len;
1491
1492         assert(Line > 0);
1493         assert(Var != NULL);
1494         assert(Arg != NULL);
1495
1496         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1497                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1498                 return;
1499         }
1500         if (strcasecmp(Var, "ChrootDir") == 0) {
1501                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1502                 if (len >= sizeof(Conf_Chroot))
1503                         Config_Error_TooLong(Line, Var);
1504                 return;
1505         }
1506         if (strcasecmp(Var, "CloakHost") == 0) {
1507                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1508                 if (len >= sizeof(Conf_CloakHost))
1509                         Config_Error_TooLong(Line, Var);
1510                 return;
1511         }
1512         if (strcasecmp(Var, "CloakHostModeX") == 0) {
1513                 len = strlcpy(Conf_CloakHostModeX, Arg, sizeof(Conf_CloakHostModeX));
1514                 if (len >= sizeof(Conf_CloakHostModeX))
1515                         Config_Error_TooLong(Line, Var);
1516                 return;
1517         }
1518         if (strcasecmp(Var, "CloakHostSalt") == 0) {
1519                 len = strlcpy(Conf_CloakHostSalt, Arg, sizeof(Conf_CloakHostSalt));
1520                 if (len >= sizeof(Conf_CloakHostSalt))
1521                         Config_Error_TooLong(Line, Var);
1522                 return;
1523         }
1524         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1525                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1526                 return;
1527         }
1528         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1529                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1530                 WarnIPv6(Line);
1531                 return;
1532         }
1533         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1534                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1535                 return;
1536         }
1537         if (strcasecmp(Var, "DNS") == 0) {
1538                 Conf_DNS = Check_ArgIsTrue(Arg);
1539                 return;
1540         }
1541         if (strcasecmp(Var, "Ident") == 0) {
1542                 Conf_Ident = Check_ArgIsTrue(Arg);
1543                 WarnIdent(Line);
1544                 return;
1545         }
1546         if (strcasecmp(Var, "MorePrivacy") == 0) {
1547                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1548                 return;
1549         }
1550         if (strcasecmp(Var, "NoticeAuth") == 0) {
1551                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1552                 return;
1553         }
1554         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1555                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1556                 return;
1557         }
1558         if (strcasecmp(Var, "OperServerMode") == 0) {
1559                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1560                 return;
1561         }
1562         if (strcasecmp(Var, "PAM") == 0) {
1563                 Conf_PAM = Check_ArgIsTrue(Arg);
1564                 WarnPAM(Line);
1565                 return;
1566         }
1567         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1568                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1569                 return;
1570         }
1571         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1572                 Conf_PredefChannelsOnly = Check_ArgIsTrue(Arg);
1573                 return;
1574         }
1575 #ifndef STRICT_RFC
1576         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1577                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1578                 return;
1579         }
1580 #endif
1581         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1582                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1583                 return;
1584         }
1585 #ifdef SYSLOG
1586         if (strcasecmp(Var, "SyslogFacility") == 0) {
1587                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1588                                                            Conf_SyslogFacility);
1589                 return;
1590         }
1591 #endif
1592         if (strcasecmp(Var, "WebircPassword") == 0) {
1593                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1594                 if (len >= sizeof(Conf_WebircPwd))
1595                         Config_Error_TooLong(Line, Var);
1596                 return;
1597         }
1598
1599         Config_Error_Section(Line, Var, "Options");
1600 }
1601
1602 #ifdef SSL_SUPPORT
1603
1604 /**
1605  * Handle variable in [SSL] configuration section.
1606  *
1607  * @param Line  Line numer in configuration file.
1608  * @param Var   Variable name.
1609  * @param Arg   Variable argument.
1610  */
1611 static void
1612 Handle_SSL(int Line, char *Var, char *Arg)
1613 {
1614         assert(Line > 0);
1615         assert(Var != NULL);
1616         assert(Arg != NULL);
1617
1618         if (strcasecmp(Var, "CertFile") == 0) {
1619                 assert(Conf_SSLOptions.CertFile == NULL);
1620                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1621                 return;
1622         }
1623         if (strcasecmp(Var, "DHFile") == 0) {
1624                 assert(Conf_SSLOptions.DHFile == NULL);
1625                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1626                 return;
1627         }
1628         if (strcasecmp(Var, "KeyFile") == 0) {
1629                 assert(Conf_SSLOptions.KeyFile == NULL);
1630                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1631                 return;
1632         }
1633         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1634                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1635                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1636                         Config_Error(LOG_ERR,
1637                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1638                                      NGIRCd_ConfFile, Line, Var,
1639                                      strerror(errno));
1640                 return;
1641         }
1642         if (strcasecmp(Var, "Ports") == 0) {
1643                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1644                 return;
1645         }
1646
1647         Config_Error_Section(Line, Var, "SSL");
1648 }
1649
1650 #endif
1651
1652 /**
1653  * Handle variable in [Operator] configuration section.
1654  *
1655  * @param Line  Line numer in configuration file.
1656  * @param Var   Variable name.
1657  * @param Arg   Variable argument.
1658  */
1659 static void
1660 Handle_OPERATOR( int Line, char *Var, char *Arg )
1661 {
1662         size_t len;
1663         struct Conf_Oper *op;
1664
1665         assert( Line > 0 );
1666         assert( Var != NULL );
1667         assert( Arg != NULL );
1668
1669         op = array_get(&Conf_Opers, sizeof(*op),
1670                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1671         if (!op)
1672                 return;
1673
1674         if (strcasecmp(Var, "Name") == 0) {
1675                 /* Name of IRC operator */
1676                 len = strlcpy(op->name, Arg, sizeof(op->name));
1677                 if (len >= sizeof(op->name))
1678                                 Config_Error_TooLong(Line, Var);
1679                 return;
1680         }
1681         if (strcasecmp(Var, "Password") == 0) {
1682                 /* Password of IRC operator */
1683                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1684                 if (len >= sizeof(op->pwd))
1685                                 Config_Error_TooLong(Line, Var);
1686                 return;
1687         }
1688         if (strcasecmp(Var, "Mask") == 0) {
1689                 if (op->mask)
1690                         return; /* Hostname already configured */
1691                 op->mask = strdup_warn( Arg );
1692                 return;
1693         }
1694
1695         Config_Error_Section(Line, Var, "Operator");
1696 }
1697
1698 /**
1699  * Handle variable in [Server] configuration section.
1700  *
1701  * @param Line  Line numer in configuration file.
1702  * @param Var   Variable name.
1703  * @param Arg   Variable argument.
1704  */
1705 static void
1706 Handle_SERVER( int Line, char *Var, char *Arg )
1707 {
1708         long port;
1709         size_t len;
1710
1711         assert( Line > 0 );
1712         assert( Var != NULL );
1713         assert( Arg != NULL );
1714
1715         /* Ignore server block if no space is left in server configuration structure */
1716         if( New_Server_Idx <= NONE ) return;
1717
1718         if( strcasecmp( Var, "Host" ) == 0 ) {
1719                 /* Hostname of the server */
1720                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1721                 if (len >= sizeof( New_Server.host ))
1722                         Config_Error_TooLong ( Line, Var );
1723                 return;
1724         }
1725         if( strcasecmp( Var, "Name" ) == 0 ) {
1726                 /* Name of the server ("Nick"/"ID") */
1727                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1728                 if (len >= sizeof( New_Server.name ))
1729                         Config_Error_TooLong( Line, Var );
1730                 return;
1731         }
1732         if (strcasecmp(Var, "Bind") == 0) {
1733                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1734                         return;
1735
1736                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1737                                 NGIRCd_ConfFile, Line, Arg);
1738                 return;
1739         }
1740         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1741                 /* Password of this server which is sent to the peer */
1742                 if (*Arg == ':') {
1743                         Config_Error(LOG_ERR,
1744                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1745                                                                                 NGIRCd_ConfFile, Line);
1746                 }
1747                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1748                 if (len >= sizeof( New_Server.pwd_in ))
1749                         Config_Error_TooLong( Line, Var );
1750                 return;
1751         }
1752         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1753                 /* Passwort of the peer which must be received */
1754                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1755                 if (len >= sizeof( New_Server.pwd_out ))
1756                         Config_Error_TooLong( Line, Var );
1757                 return;
1758         }
1759         if( strcasecmp( Var, "Port" ) == 0 ) {
1760                 /* Port to which this server should connect */
1761                 port = atol( Arg );
1762                 if (port >= 0 && port < 0xFFFF)
1763                         New_Server.port = (UINT16)port;
1764                 else
1765                         Config_Error(LOG_ERR,
1766                                 "%s, line %d (section \"Server\"): Illegal port number %ld!",
1767                                 NGIRCd_ConfFile, Line, port );
1768                 return;
1769         }
1770 #ifdef SSL_SUPPORT
1771         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1772                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1773                 return;
1774         }
1775 #endif
1776         if( strcasecmp( Var, "Group" ) == 0 ) {
1777                 /* Server group */
1778                 New_Server.group = atoi( Arg );
1779                 if (!New_Server.group && strcmp(Arg, "0"))
1780                         Config_Error_NaN(Line, Var);
1781                 return;
1782         }
1783         if( strcasecmp( Var, "Passive" ) == 0 ) {
1784                 if (Check_ArgIsTrue(Arg))
1785                         New_Server.flags |= CONF_SFLAG_DISABLED;
1786                 return;
1787         }
1788         if (strcasecmp(Var, "ServiceMask") == 0) {
1789                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1790                               sizeof(New_Server.svs_mask));
1791                 if (len >= sizeof(New_Server.svs_mask))
1792                         Config_Error_TooLong(Line, Var);
1793                 return;
1794         }
1795
1796         Config_Error_Section(Line, Var, "Server");
1797 }
1798
1799 /**
1800  * Copy channel name into channel structure.
1801  *
1802  * If the channel name is not valid because of a missing prefix ('#', '&'),
1803  * a default prefix of '#' will be added.
1804  *
1805  * @param new_chan      New already allocated channel structure.
1806  * @param name          Name of the new channel.
1807  * @returns             true on success, false otherwise.
1808  */
1809 static bool
1810 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1811 {
1812         size_t size = sizeof(new_chan->name);
1813         char *dest = new_chan->name;
1814
1815         if (!Channel_IsValidName(name)) {
1816                 /*
1817                  * maybe user forgot to add a '#'.
1818                  * This is only here for user convenience.
1819                  */
1820                 *dest = '#';
1821                 --size;
1822                 ++dest;
1823         }
1824         return size > strlcpy(dest, name, size);
1825 }
1826
1827 /**
1828  * Handle variable in [Channel] configuration section.
1829  *
1830  * @param Line  Line numer in configuration file.
1831  * @param Var   Variable name.
1832  * @param Arg   Variable argument.
1833  */
1834 static void
1835 Handle_CHANNEL(int Line, char *Var, char *Arg)
1836 {
1837         size_t len;
1838         struct Conf_Channel *chan;
1839
1840         assert( Line > 0 );
1841         assert( Var != NULL );
1842         assert( Arg != NULL );
1843
1844         chan = array_get(&Conf_Channels, sizeof(*chan),
1845                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1846         if (!chan)
1847                 return;
1848
1849         if (strcasecmp(Var, "Name") == 0) {
1850                 if (!Handle_Channelname(chan, Arg))
1851                         Config_Error_TooLong(Line, Var);
1852                 return;
1853         }
1854         if (strcasecmp(Var, "Modes") == 0) {
1855                 /* Initial modes */
1856                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1857                 if (len >= sizeof(chan->modes))
1858                         Config_Error_TooLong( Line, Var );
1859                 return;
1860         }
1861         if( strcasecmp( Var, "Topic" ) == 0 ) {
1862                 /* Initial topic */
1863                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1864                 if (len >= sizeof(chan->topic))
1865                         Config_Error_TooLong( Line, Var );
1866                 return;
1867         }
1868         if( strcasecmp( Var, "Key" ) == 0 ) {
1869                 /* Initial Channel Key (mode k) */
1870                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1871                 if (len >= sizeof(chan->key))
1872                         Config_Error_TooLong(Line, Var);
1873                 return;
1874         }
1875         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1876                 /* maximum user limit, mode l */
1877                 chan->maxusers = (unsigned long) atol(Arg);
1878                 if (!chan->maxusers && strcmp(Arg, "0"))
1879                         Config_Error_NaN(Line, Var);
1880                 return;
1881         }
1882         if (strcasecmp(Var, "KeyFile") == 0) {
1883                 /* channel keys */
1884                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1885                 if (len >= sizeof(chan->keyfile))
1886                         Config_Error_TooLong(Line, Var);
1887                 return;
1888         }
1889
1890         Config_Error_Section(Line, Var, "Channel");
1891 }
1892
1893 /**
1894  * Validate server configuration.
1895  *
1896  * Please note that this function uses exit(1) on fatal errors and therefore
1897  * can result in ngIRCd terminating!
1898  *
1899  * @param Configtest    true if the daemon has been called with "--configtest".
1900  * @param Rehash        true if re-reading configuration on runtime.
1901  * @returns             true if configuration is valid.
1902  */
1903 static bool
1904 Validate_Config(bool Configtest, bool Rehash)
1905 {
1906         /* Validate configuration settings. */
1907
1908 #ifdef DEBUG
1909         int i, servers, servers_once;
1910 #endif
1911         bool config_valid = true;
1912         char *ptr;
1913
1914         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1915         ptr = Conf_ServerName;
1916         do {
1917                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1918                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1919                 if (*ptr >= '0' && *ptr <= '9') continue;
1920                 if (ptr > Conf_ServerName) {
1921                         if (*ptr == '.' || *ptr == '-')
1922                                 continue;
1923                 }
1924                 Conf_ServerName[0] = '\0';
1925                 break;
1926         } while (*(++ptr));
1927
1928         if (!Conf_ServerName[0]) {
1929                 /* No server name configured! */
1930                 config_valid = false;
1931                 Config_Error(LOG_ALERT,
1932                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1933                              NGIRCd_ConfFile);
1934                 if (!Configtest && !Rehash) {
1935                         Config_Error(LOG_ALERT,
1936                                      "%s exiting due to fatal errors!",
1937                                      PACKAGE_NAME);
1938                         exit(1);
1939                 }
1940         }
1941
1942         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1943                 /* No dot in server name! */
1944                 config_valid = false;
1945                 Config_Error(LOG_ALERT,
1946                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1947                              NGIRCd_ConfFile);
1948                 if (!Configtest) {
1949                         Config_Error(LOG_ALERT,
1950                                      "%s exiting due to fatal errors!",
1951                                      PACKAGE_NAME);
1952                         exit(1);
1953                 }
1954         }
1955
1956 #ifdef STRICT_RFC
1957         if (!Conf_ServerAdminMail[0]) {
1958                 /* No administrative contact configured! */
1959                 config_valid = false;
1960                 Config_Error(LOG_ALERT,
1961                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1962                              NGIRCd_ConfFile);
1963                 if (!Configtest) {
1964                         Config_Error(LOG_ALERT,
1965                                      "%s exiting due to fatal errors!",
1966                                      PACKAGE_NAME);
1967                         exit(1);
1968                 }
1969         }
1970 #endif
1971
1972         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1973             && !Conf_ServerAdminMail[0]) {
1974                 /* No administrative information configured! */
1975                 Config_Error(LOG_WARNING,
1976                              "No administrative information configured but required by RFC!");
1977         }
1978
1979 #ifdef PAM
1980         if (Conf_ServerPwd[0])
1981                 Config_Error(LOG_ERR,
1982                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
1983 #endif
1984
1985 #ifdef DEBUG
1986         servers = servers_once = 0;
1987         for (i = 0; i < MAX_SERVERS; i++) {
1988                 if (Conf_Server[i].name[0]) {
1989                         servers++;
1990                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1991                                 servers_once++;
1992                 }
1993         }
1994         Log(LOG_DEBUG,
1995             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
1996             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
1997             servers, servers_once,
1998             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
1999 #endif
2000
2001         return config_valid;
2002 }
2003
2004 /**
2005  * Output "line too long" warning.
2006  *
2007  * @param Line  Line number in configuration file.
2008  * @param Item  Affected variable name.
2009  */
2010 static void
2011 Config_Error_TooLong ( const int Line, const char *Item )
2012 {
2013         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
2014 }
2015
2016 /**
2017  * Output "unknown variable" warning.
2018  *
2019  * @param Line          Line number in configuration file.
2020  * @param Item          Affected variable name.
2021  * @param Section       Section name.
2022  */
2023 static void
2024 Config_Error_Section(const int Line, const char *Item, const char *Section)
2025 {
2026         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
2027                      NGIRCd_ConfFile, Line, Section, Item);
2028 }
2029
2030 /**
2031  * Output "not a number" warning.
2032  *
2033  * @param Line  Line number in configuration file.
2034  * @param Item  Affected variable name.
2035  */
2036 static void
2037 Config_Error_NaN( const int Line, const char *Item )
2038 {
2039         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
2040                                                 NGIRCd_ConfFile, Line, Item );
2041 }
2042
2043 /**
2044  * Output configuration error to console and/or logfile.
2045  *
2046  * On runtime, the normal log functions of the daemon are used. But when
2047  * testing the configuration ("--configtest"), all messages go directly
2048  * to the console.
2049  *
2050  * @param Level         Severity level of the message.
2051  * @param Format        Format string; see printf() function.
2052  */
2053 #ifdef PROTOTYPES
2054 static void Config_Error( const int Level, const char *Format, ... )
2055 #else
2056 static void Config_Error( Level, Format, va_alist )
2057 const int Level;
2058 const char *Format;
2059 va_dcl
2060 #endif
2061 {
2062         char msg[MAX_LOG_MSG_LEN];
2063         va_list ap;
2064
2065         assert( Format != NULL );
2066
2067 #ifdef PROTOTYPES
2068         va_start( ap, Format );
2069 #else
2070         va_start( ap );
2071 #endif
2072         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2073         va_end( ap );
2074
2075         if (!Use_Log) {
2076                 if (Level <= LOG_WARNING)
2077                         printf(" - %s\n", msg);
2078                 else
2079                         puts(msg);
2080         } else
2081                 Log(Level, "%s", msg);
2082 }
2083
2084 #ifdef DEBUG
2085
2086 /**
2087  * Dump internal state of the "configuration module".
2088  */
2089 GLOBAL void
2090 Conf_DebugDump(void)
2091 {
2092         int i;
2093
2094         Log(LOG_DEBUG, "Configured servers:");
2095         for (i = 0; i < MAX_SERVERS; i++) {
2096                 if (! Conf_Server[i].name[0])
2097                         continue;
2098                 Log(LOG_DEBUG,
2099                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2100                     Conf_Server[i].name, Conf_Server[i].host,
2101                     Conf_Server[i].port, Conf_Server[i].lasttry,
2102                     Conf_Server[i].group, Conf_Server[i].flags,
2103                     Conf_Server[i].conn_id);
2104         }
2105 }
2106
2107 #endif
2108
2109 /**
2110  * Initialize server configuration structur to default values.
2111  *
2112  * @param Server        Pointer to server structure to initialize.
2113  */
2114 static void
2115 Init_Server_Struct( CONF_SERVER *Server )
2116 {
2117         assert( Server != NULL );
2118
2119         memset( Server, 0, sizeof (CONF_SERVER) );
2120
2121         Server->group = NONE;
2122         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2123
2124         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2125
2126         Proc_InitStruct(&Server->res_stat);
2127         Server->conn_id = NONE;
2128         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2129 }
2130
2131 /* -eof- */