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1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001-2013 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 <ctype.h>
22 #include <errno.h>
23 #ifdef PROTOTYPES
24 #       include <stdarg.h>
25 #else
26 #       include <varargs.h>
27 #endif
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <strings.h>
32 #include <unistd.h>
33 #include <pwd.h>
34 #include <grp.h>
35 #include <sys/types.h>
36 #include <unistd.h>
37 #include <dirent.h>
38
39 #include "array.h"
40 #include "ngircd.h"
41 #include "conn.h"
42 #include "channel.h"
43 #include "defines.h"
44 #include "log.h"
45 #include "match.h"
46 #include "tool.h"
47
48 #include "exp.h"
49 #include "conf.h"
50
51
52 static bool Use_Log = true, Using_MotdFile = true;
53 static CONF_SERVER New_Server;
54 static int New_Server_Idx;
55
56 static char Conf_MotdFile[FNAME_LEN];
57 static char Conf_HelpFile[FNAME_LEN];
58 static char Conf_IncludeDir[FNAME_LEN];
59
60 static void Set_Defaults PARAMS(( bool InitServers ));
61 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
62 static void Read_Config_File PARAMS(( const char *File, FILE *fd ));
63 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
64
65 static void Handle_GLOBAL PARAMS((const char *File, int Line,
66                                   char *Var, char *Arg ));
67 static void Handle_LIMITS PARAMS((const char *File, int Line,
68                                   char *Var, char *Arg ));
69 static void Handle_OPTIONS PARAMS((const char *File, int Line,
70                                    char *Var, char *Arg ));
71 static void Handle_OPERATOR PARAMS((const char *File, int Line,
72                                     char *Var, char *Arg ));
73 static void Handle_SERVER PARAMS((const char *File, int Line,
74                                   char *Var, char *Arg ));
75 static void Handle_CHANNEL PARAMS((const char *File, int Line,
76                                    char *Var, char *Arg ));
77
78 static void Config_Error PARAMS((const int Level, const char *Format, ...));
79
80 static void Config_Error_NaN PARAMS((const char *File, const int LINE,
81                                      const char *Value));
82 static void Config_Error_Section PARAMS((const char *File, const int Line,
83                                          const char *Item, const char *Section));
84 static void Config_Error_TooLong PARAMS((const char *File, const int LINE,
85                                          const char *Value));
86
87 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
88
89
90 #ifdef WANT_IPV6
91 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
92 #else
93 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
94 #endif
95
96 #ifdef HAVE_LIBSSL
97 #define DEFAULT_CIPHERS         "HIGH:!aNULL:@STRENGTH"
98 #endif
99 #ifdef HAVE_LIBGNUTLS
100 #define DEFAULT_CIPHERS         "SECURE128"
101 #endif
102
103 #ifdef SSL_SUPPORT
104
105 static void Handle_SSL PARAMS((const char *File, int Line, char *Var, char *Ark));
106
107 struct SSLOptions Conf_SSLOptions;
108
109 /**
110  * Initialize SSL configuration.
111  */
112 static void
113 ConfSSL_Init(void)
114 {
115         free(Conf_SSLOptions.KeyFile);
116         Conf_SSLOptions.KeyFile = NULL;
117
118         free(Conf_SSLOptions.CertFile);
119         Conf_SSLOptions.CertFile = NULL;
120
121         free(Conf_SSLOptions.DHFile);
122         Conf_SSLOptions.DHFile = NULL;
123         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
124
125         array_free(&Conf_SSLOptions.ListenPorts);
126
127         free(Conf_SSLOptions.CipherList);
128         Conf_SSLOptions.CipherList = NULL;
129 }
130
131 /**
132  * Check if the current configuration uses/requires SSL.
133  *
134  * @returns true if SSL is used and should be initialized.
135  */
136 GLOBAL bool
137 Conf_SSLInUse(void)
138 {
139         int i;
140
141         /* SSL listen ports configured? */
142         if (array_bytes(&Conf_SSLOptions.ListenPorts))
143                 return true;
144
145         for (i = 0; i < MAX_SERVERS; i++) {
146                 if (Conf_Server[i].port > 0
147                     && Conf_Server[i].SSLConnect)
148                         return true;
149         }
150         return false;
151 }
152
153 /**
154  * Make sure that a configured file is readable.
155  *
156  * Currently, this function is only used for SSL-related options ...
157  *
158  * @param Var Configuration variable
159  * @param Filename Configured filename
160  */
161 static void
162 CheckFileReadable(const char *Var, const char *Filename)
163 {
164         FILE *fp;
165
166         if (!Filename)
167                 return;
168
169         fp = fopen(Filename, "r");
170         if (fp)
171                 fclose(fp);
172         else
173                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
174                              Filename, Var, strerror(errno));
175 }
176
177 #endif
178
179
180 /**
181  * Duplicate string and warn on errors.
182  *
183  * @returns Pointer to string on success, NULL otherwise.
184  */
185 static char *
186 strdup_warn(const char *str)
187 {
188         char *ptr = strdup(str);
189         if (!ptr)
190                 Config_Error(LOG_ERR,
191                              "Could not allocate memory for string: %s", str);
192         return ptr;
193 }
194
195 /**
196  * Output a comma separated list of ports (integer values).
197  */
198 static void
199 ports_puts(array *a)
200 {
201         size_t len;
202         UINT16 *ports;
203         len = array_length(a, sizeof(UINT16));
204         if (len--) {
205                 ports = (UINT16*) array_start(a);
206                 printf("%u", (unsigned int) *ports);
207                 while (len--) {
208                         ports++;
209                         printf(", %u", (unsigned int) *ports);
210                 }
211         }
212         putc('\n', stdout);
213 }
214
215 /**
216  * Parse a comma separated string into an array of port numbers (integers).
217  */
218 static void
219 ports_parse(array *a, const char *File, int Line, char *Arg)
220 {
221         char *ptr;
222         int port;
223         UINT16 port16;
224
225         array_trunc(a);
226
227         ptr = strtok( Arg, "," );
228         while (ptr) {
229                 ngt_TrimStr(ptr);
230                 port = atoi(ptr);
231                 if (port > 0 && port < 0xFFFF) {
232                         port16 = (UINT16) port;
233                         if (!array_catb(a, (char*)&port16, sizeof port16))
234                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
235                                              File, Line, port, strerror(errno));
236                 } else {
237                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
238                                      File, Line, port );
239                 }
240
241                 ptr = strtok( NULL, "," );
242         }
243 }
244
245 /**
246  * Initialize configuration module.
247  */
248 GLOBAL void
249 Conf_Init( void )
250 {
251         Read_Config(false, true);
252         Validate_Config(false, false);
253 }
254
255 /**
256  * "Rehash" (reload) server configuration.
257  *
258  * @returns true if configuration has been re-read, false on errors.
259  */
260 GLOBAL bool
261 Conf_Rehash( void )
262 {
263         if (!Read_Config(false, false))
264                 return false;
265         Validate_Config(false, true);
266
267         /* Update CLIENT structure of local server */
268         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
269         return true;
270 }
271
272 /**
273  * Output a boolean value as "yes/no" string.
274  */
275 static const char*
276 yesno_to_str(int boolean_value)
277 {
278         if (boolean_value)
279                 return "yes";
280         return "no";
281 }
282
283 /**
284  * Free all IRC operator configuration structures.
285  */
286 static void
287 opers_free(void)
288 {
289         struct Conf_Oper *op;
290         size_t len;
291
292         len = array_length(&Conf_Opers, sizeof(*op));
293         op = array_start(&Conf_Opers);
294         while (len--) {
295                 free(op->mask);
296                 op++;
297         }
298         array_free(&Conf_Opers);
299 }
300
301 /**
302  * Output all IRC operator configuration structures.
303  */
304 static void
305 opers_puts(void)
306 {
307         struct Conf_Oper *op;
308         size_t count, i;
309
310         count = array_length(&Conf_Opers, sizeof(*op));
311         op = array_start(&Conf_Opers);
312         for (i = 0; i < count; i++, op++) {
313                 if (!op->name[0])
314                         continue;
315
316                 puts("[OPERATOR]");
317                 printf("  Name = %s\n", op->name);
318                 printf("  Password = %s\n", op->pwd);
319                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
320         }
321 }
322
323 /**
324  * Read configuration, validate and output it.
325  *
326  * This function waits for a keypress of the user when stdin/stdout are valid
327  * tty's ("you can read our nice message and we can read in your keypress").
328  *
329  * @return      0 on success, 1 on failure(s); therefore the result code can
330  *              directly be used by exit() when running "ngircd --configtest".
331  */
332 GLOBAL int
333 Conf_Test( void )
334 {
335         struct passwd *pwd;
336         struct group *grp;
337         unsigned int i;
338         bool config_valid;
339         size_t predef_channel_count;
340         struct Conf_Channel *predef_chan;
341
342         Use_Log = false;
343
344         if (!Read_Config(true, true))
345                 return 1;
346
347         config_valid = Validate_Config(true, false);
348
349         /* Valid tty? */
350         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
351                 puts("OK, press enter to see a dump of your server configuration ...");
352                 getchar();
353         } else
354                 puts("Ok, dump of your server configuration follows:\n");
355
356         puts("[GLOBAL]");
357         printf("  Name = %s\n", Conf_ServerName);
358         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
359         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
360         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
361         printf("  HelpFile = %s\n", Conf_HelpFile);
362         printf("  Info = %s\n", Conf_ServerInfo);
363         printf("  Listen = %s\n", Conf_ListenAddress);
364         if (Using_MotdFile) {
365                 printf("  MotdFile = %s\n", Conf_MotdFile);
366                 printf("  MotdPhrase =\n");
367         } else {
368                 printf("  MotdFile = \n");
369                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
370                        ? (const char*) array_start(&Conf_Motd) : "");
371         }
372 #ifndef PAM
373         printf("  Password = %s\n", Conf_ServerPwd);
374 #endif
375         printf("  PidFile = %s\n", Conf_PidFile);
376         printf("  Ports = ");
377         ports_puts(&Conf_ListenPorts);
378         grp = getgrgid(Conf_GID);
379         if (grp)
380                 printf("  ServerGID = %s\n", grp->gr_name);
381         else
382                 printf("  ServerGID = %ld\n", (long)Conf_GID);
383         pwd = getpwuid(Conf_UID);
384         if (pwd)
385                 printf("  ServerUID = %s\n", pwd->pw_name);
386         else
387                 printf("  ServerUID = %ld\n", (long)Conf_UID);
388         puts("");
389
390         puts("[LIMITS]");
391         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
392         printf("  IdleTimeout = %d\n", Conf_IdleTimeout);
393         printf("  MaxConnections = %d\n", Conf_MaxConnections);
394         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
395         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
396         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
397         printf("  MaxListSize = %d\n", Conf_MaxListSize);
398         printf("  PingTimeout = %d\n", Conf_PingTimeout);
399         printf("  PongTimeout = %d\n", Conf_PongTimeout);
400         puts("");
401
402         puts("[OPTIONS]");
403         printf("  AllowedChannelTypes = %s\n", Conf_AllowedChannelTypes);
404         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
405         printf("  ChrootDir = %s\n", Conf_Chroot);
406         printf("  CloakHost = %s\n", Conf_CloakHost);
407         printf("  CloakHostModeX = %s\n", Conf_CloakHostModeX);
408         printf("  CloakHostSalt = %s\n", Conf_CloakHostSalt);
409         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
410 #ifdef WANT_IPV6
411         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
412         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
413 #endif
414         printf("  DefaultUserModes = %s\n", Conf_DefaultUserModes);
415         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
416 #ifdef IDENT
417         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
418 #endif
419         printf("  IncludeDir = %s\n", Conf_IncludeDir);
420         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
421         printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
422         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
423         printf("  OperChanPAutoOp = %s\n", yesno_to_str(Conf_OperChanPAutoOp));
424         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
425 #ifdef PAM
426         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
427         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
428 #endif
429 #ifndef STRICT_RFC
430         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
431 #endif
432         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
433 #ifdef SYSLOG
434         printf("  SyslogFacility = %s\n",
435                ngt_SyslogFacilityName(Conf_SyslogFacility));
436 #endif
437         printf("  WebircPassword = %s\n", Conf_WebircPwd);
438         puts("");
439
440 #ifdef SSL_SUPPORT
441         puts("[SSL]");
442         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
443                                         ? Conf_SSLOptions.CertFile : "");
444         printf("  CipherList = %s\n", Conf_SSLOptions.CipherList ?
445                Conf_SSLOptions.CipherList : DEFAULT_CIPHERS);
446         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
447                                         ? Conf_SSLOptions.DHFile : "");
448         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
449                                         ? Conf_SSLOptions.KeyFile : "");
450         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
451                 puts("  KeyFilePassword = <secret>");
452         else
453                 puts("  KeyFilePassword = ");
454         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
455         printf("  Ports = ");
456         ports_puts(&Conf_SSLOptions.ListenPorts);
457         puts("");
458 #endif
459
460         opers_puts();
461
462         for( i = 0; i < MAX_SERVERS; i++ ) {
463                 if( ! Conf_Server[i].name[0] ) continue;
464
465                 /* Valid "Server" section */
466                 puts( "[SERVER]" );
467                 printf( "  Name = %s\n", Conf_Server[i].name );
468                 printf( "  Host = %s\n", Conf_Server[i].host );
469                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
470 #ifdef SSL_SUPPORT
471                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
472 #endif
473                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
474                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
475                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
476                 printf( "  Group = %d\n", Conf_Server[i].group );
477                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
478         }
479
480         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
481         predef_chan = array_start(&Conf_Channels);
482
483         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
484                 if (!predef_chan->name[0])
485                         continue;
486
487                 /* Valid "Channel" section */
488                 puts( "[CHANNEL]" );
489                 printf("  Name = %s\n", predef_chan->name);
490                 printf("  Modes = %s\n", predef_chan->modes);
491                 printf("  Key = %s\n", predef_chan->key);
492                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
493                 printf("  Topic = %s\n", predef_chan->topic);
494                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
495         }
496
497         return (config_valid ? 0 : 1);
498 }
499
500 /**
501  * Remove connection information from configured server.
502  *
503  * If the server is set as "once", delete it from our configuration;
504  * otherwise set the time for the next connection attempt.
505  *
506  * Non-server connections will be silently ignored.
507  */
508 GLOBAL void
509 Conf_UnsetServer( CONN_ID Idx )
510 {
511         int i;
512         time_t t;
513
514         /* Check all our configured servers */
515         for( i = 0; i < MAX_SERVERS; i++ ) {
516                 if( Conf_Server[i].conn_id != Idx ) continue;
517
518                 /* Gotcha! Mark server configuration as "unused": */
519                 Conf_Server[i].conn_id = NONE;
520
521                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
522                         /* Delete configuration here */
523                         Init_Server_Struct( &Conf_Server[i] );
524                 } else {
525                         /* Set time for next connect attempt */
526                         t = time(NULL);
527                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
528                                 /* The connection has been "long", so we don't
529                                  * require the next attempt to be delayed. */
530                                 Conf_Server[i].lasttry =
531                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
532                         } else {
533                                 /* "Short" connection, enforce "ConnectRetry"
534                                  * but randomize it a little bit: 15 seconds. */
535                                 Conf_Server[i].lasttry =
536 #ifdef HAVE_ARC4RANDOM
537                                         t + (arc4random() % 15);
538 #else
539                                         t + rand() / (RAND_MAX / 15);
540 #endif
541                         }
542                 }
543         }
544 }
545
546 /**
547  * Set connection information for specified configured server.
548  */
549 GLOBAL bool
550 Conf_SetServer( int ConfServer, CONN_ID Idx )
551 {
552         assert( ConfServer > NONE );
553         assert( Idx > NONE );
554
555         if (Conf_Server[ConfServer].conn_id > NONE &&
556             Conf_Server[ConfServer].conn_id != Idx) {
557                 Log(LOG_ERR,
558                     "Connection %d: Server configuration of \"%s\" already in use by connection %d!",
559                     Idx, Conf_Server[ConfServer].name,
560                     Conf_Server[ConfServer].conn_id);
561                 Conn_Close(Idx, NULL, "Server configuration already in use", true);
562                 return false;
563         }
564         Conf_Server[ConfServer].conn_id = Idx;
565         return true;
566 }
567
568 /**
569  * Get index of server in configuration structure.
570  */
571 GLOBAL int
572 Conf_GetServer( CONN_ID Idx )
573 {
574         int i = 0;
575
576         assert( Idx > NONE );
577
578         for( i = 0; i < MAX_SERVERS; i++ ) {
579                 if( Conf_Server[i].conn_id == Idx ) return i;
580         }
581         return NONE;
582 }
583
584 /**
585  * Enable a server by name and adjust its port number.
586  *
587  * @returns     true if a server has been enabled and now has a valid port
588  *              number and host name for outgoing connections.
589  */
590 GLOBAL bool
591 Conf_EnableServer( const char *Name, UINT16 Port )
592 {
593         int i;
594
595         assert( Name != NULL );
596         for( i = 0; i < MAX_SERVERS; i++ ) {
597                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
598                         /* Gotcha! Set port and enable server: */
599                         Conf_Server[i].port = Port;
600                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
601                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
602                 }
603         }
604         return false;
605 }
606
607 /**
608  * Enable a server by name.
609  *
610  * The server is only usable as outgoing server, if it has set a valid port
611  * number for outgoing connections!
612  * If not, you have to use Conf_EnableServer() function to make it available.
613  *
614  * @returns     true if a server has been enabled; false otherwise.
615  */
616 GLOBAL bool
617 Conf_EnablePassiveServer(const char *Name)
618 {
619         int i;
620
621         assert( Name != NULL );
622         for (i = 0; i < MAX_SERVERS; i++) {
623                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
624                     && (Conf_Server[i].port > 0)) {
625                         /* BINGO! Enable server */
626                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
627                         return true;
628                 }
629         }
630         return false;
631 }
632
633 /**
634  * Disable a server by name.
635  * An already established connection will be disconnected.
636  *
637  * @returns     true if a server was found and has been disabled.
638  */
639 GLOBAL bool
640 Conf_DisableServer( const char *Name )
641 {
642         int i;
643
644         assert( Name != NULL );
645         for( i = 0; i < MAX_SERVERS; i++ ) {
646                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
647                         /* Gotcha! Disable and disconnect server: */
648                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
649                         if( Conf_Server[i].conn_id > NONE )
650                                 Conn_Close(Conf_Server[i].conn_id, NULL,
651                                            "Server link terminated on operator request",
652                                            true);
653                         return true;
654                 }
655         }
656         return false;
657 }
658
659 /**
660  * Add a new remote server to our configuration.
661  *
662  * @param Name          Name of the new server.
663  * @param Port          Port number to connect to or 0 for incoming connections.
664  * @param Host          Host name to connect to.
665  * @param MyPwd         Password that will be sent to the peer.
666  * @param PeerPwd       Password that must be received from the peer.
667  * @returns             true if the new server has been added; false otherwise.
668  */
669 GLOBAL bool
670 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
671                const char *MyPwd, const char *PeerPwd)
672 {
673         int i;
674
675         assert( Name != NULL );
676         assert( Host != NULL );
677         assert( MyPwd != NULL );
678         assert( PeerPwd != NULL );
679
680         /* Search unused item in server configuration structure */
681         for( i = 0; i < MAX_SERVERS; i++ ) {
682                 /* Is this item used? */
683                 if( ! Conf_Server[i].name[0] ) break;
684         }
685         if( i >= MAX_SERVERS ) return false;
686
687         Init_Server_Struct( &Conf_Server[i] );
688         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
689         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
690         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
691         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
692         Conf_Server[i].port = Port;
693         Conf_Server[i].flags = CONF_SFLAG_ONCE;
694
695         return true;
696 }
697
698 /**
699  * Check if the given nickname is reserved for services on a particular server.
700  *
701  * @param ConfServer The server index to check.
702  * @param Nick The nickname to check.
703  * @returns true if the given nickname belongs to an "IRC service".
704  */
705 GLOBAL bool
706 Conf_NickIsService(int ConfServer, const char *Nick)
707 {
708         assert (ConfServer >= 0);
709         assert (ConfServer < MAX_SERVERS);
710
711         return MatchCaseInsensitiveList(Conf_Server[ConfServer].svs_mask,
712                                         Nick, ",");
713 }
714
715 /**
716  * Check if the given nickname is blocked for "normal client" use.
717  *
718  * @param ConfServer The server index or NONE to check all configured servers.
719  * @param Nick The nickname to check.
720  * @returns true if the given nickname belongs to an "IRC service".
721  */
722 GLOBAL bool
723 Conf_NickIsBlocked(const char *Nick)
724 {
725         int i;
726
727         for(i = 0; i < MAX_SERVERS; i++) {
728                 if (!Conf_Server[i].name[0])
729                         continue;
730                 if (Conf_NickIsService(i, Nick))
731                         return true;
732         }
733         return false;
734 }
735
736 /**
737  * Initialize configuration settings with their default values.
738  */
739 static void
740 Set_Defaults(bool InitServers)
741 {
742         int i;
743         char random[RANDOM_SALT_LEN + 1];
744
745         /* Global */
746         strcpy(Conf_ServerName, "");
747         strcpy(Conf_ServerAdmin1, "");
748         strcpy(Conf_ServerAdmin2, "");
749         strcpy(Conf_ServerAdminMail, "");
750         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
751                  PACKAGE_NAME, PACKAGE_VERSION);
752         free(Conf_ListenAddress);
753         Conf_ListenAddress = NULL;
754         array_free(&Conf_ListenPorts);
755         array_free(&Conf_Motd);
756         array_free(&Conf_Helptext);
757         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
758         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
759         strlcpy(Conf_HelpFile, DOCDIR, sizeof(Conf_HelpFile));
760         strlcat(Conf_HelpFile, HELP_FILE, sizeof(Conf_HelpFile));
761         strcpy(Conf_ServerPwd, "");
762         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
763         Conf_UID = Conf_GID = 0;
764
765         /* Limits */
766         Conf_ConnectRetry = 60;
767         Conf_IdleTimeout = 0;
768         Conf_MaxConnections = 0;
769         Conf_MaxConnectionsIP = 5;
770         Conf_MaxJoins = 10;
771         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
772         Conf_MaxListSize = 100;
773         Conf_PingTimeout = 120;
774         Conf_PongTimeout = 20;
775
776         /* Options */
777         strlcpy(Conf_AllowedChannelTypes, CHANTYPES,
778                 sizeof(Conf_AllowedChannelTypes));
779         Conf_AllowRemoteOper = false;
780 #ifndef STRICT_RFC
781         Conf_AuthPing = false;
782 #endif
783         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
784         strcpy(Conf_CloakHost, "");
785         strcpy(Conf_CloakHostModeX, "");
786         strlcpy(Conf_CloakHostSalt, ngt_RandomStr(random, RANDOM_SALT_LEN),
787                 sizeof(Conf_CloakHostSalt));
788         Conf_CloakUserToNick = false;
789         Conf_ConnectIPv4 = true;
790 #ifdef WANT_IPV6
791         Conf_ConnectIPv6 = true;
792 #else
793         Conf_ConnectIPv6 = false;
794 #endif
795         strcpy(Conf_DefaultUserModes, "");
796         Conf_DNS = true;
797 #ifdef IDENTAUTH
798         Conf_Ident = true;
799 #else
800         Conf_Ident = false;
801 #endif
802         strcpy(Conf_IncludeDir, "");
803         Conf_MorePrivacy = false;
804         Conf_NoticeAuth = false;
805         Conf_OperCanMode = false;
806         Conf_OperChanPAutoOp = true;
807         Conf_OperServerMode = false;
808 #ifdef PAM
809         Conf_PAM = true;
810 #else
811         Conf_PAM = false;
812 #endif
813         Conf_PAMIsOptional = false;
814 #ifdef SYSLOG
815         Conf_ScrubCTCP = false;
816 #ifdef LOG_LOCAL5
817         Conf_SyslogFacility = LOG_LOCAL5;
818 #else
819         Conf_SyslogFacility = 0;
820 #endif
821 #endif
822
823         /* Initialize server configuration structures */
824         if (InitServers) {
825                 for (i = 0; i < MAX_SERVERS;
826                      Init_Server_Struct(&Conf_Server[i++]));
827         }
828 }
829
830 /**
831  * Get number of configured listening ports.
832  *
833  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
834  */
835 static bool
836 no_listenports(void)
837 {
838         size_t cnt = array_bytes(&Conf_ListenPorts);
839 #ifdef SSL_SUPPORT
840         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
841 #endif
842         return cnt == 0;
843 }
844
845 /**
846  * Read contents of a text file into an array.
847  *
848  * This function is used to read the MOTD and help text file, for example.
849  *
850  * @param filename      Name of the file to read.
851  * @return              true, when the file has been read in.
852  */
853 static bool
854 Read_TextFile(const char *Filename, const char *Name, array *Destination)
855 {
856         char line[127];
857         FILE *fp;
858         int line_no = 1;
859
860         if (*Filename == '\0')
861                 return false;
862
863         fp = fopen(Filename, "r");
864         if (!fp) {
865                 Config_Error(LOG_ERR, "Can't read %s file \"%s\": %s",
866                              Name, Filename, strerror(errno));
867                 return false;
868         }
869
870         array_free(Destination);
871         while (fgets(line, (int)sizeof line, fp)) {
872                 ngt_TrimLastChr(line, '\n');
873
874                 /* add text including \0 */
875                 if (!array_catb(Destination, line, strlen(line) + 1)) {
876                         Log(LOG_ERR, "Cannot read/add \"%s\", line %d: %s",
877                             Filename, line_no, strerror(errno));
878                         break;
879                 }
880                 line_no++;
881         }
882         fclose(fp);
883         return true;
884 }
885
886 /**
887  * Read ngIRCd configuration file.
888  *
889  * Please note that this function uses exit(1) on fatal errors and therefore
890  * can result in ngIRCd terminating!
891  *
892  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
893  * @returns                     true when the configuration file has been read
894  *                              successfully; false otherwise.
895  */
896 static bool
897 Read_Config(bool TestOnly, bool IsStarting)
898 {
899         const UINT16 defaultport = 6667;
900         char *ptr, file[FNAME_LEN];
901         struct dirent *entry;
902         int i, n;
903         FILE *fd;
904         DIR *dh;
905
906         /* Open configuration file */
907         fd = fopen( NGIRCd_ConfFile, "r" );
908         if( ! fd ) {
909                 /* No configuration file found! */
910                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
911                                         NGIRCd_ConfFile, strerror( errno ));
912                 if (!IsStarting)
913                         return false;
914                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
915                 exit( 1 );
916         }
917
918         opers_free();
919         Set_Defaults(IsStarting);
920
921         if (TestOnly)
922                 Config_Error(LOG_INFO,
923                              "Reading configuration from \"%s\" ...",
924                              NGIRCd_ConfFile );
925
926         /* Clean up server configuration structure: mark all already
927          * configured servers as "once" so that they are deleted
928          * after the next disconnect and delete all unused servers.
929          * And delete all servers which are "duplicates" of servers
930          * that are already marked as "once" (such servers have been
931          * created by the last rehash but are now useless). */
932         for( i = 0; i < MAX_SERVERS; i++ ) {
933                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
934                 else {
935                         /* This structure is in use ... */
936                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
937                                 /* Check for duplicates */
938                                 for( n = 0; n < MAX_SERVERS; n++ ) {
939                                         if( n == i ) continue;
940
941                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
942                                                 Init_Server_Struct( &Conf_Server[n] );
943 #ifdef DEBUG
944                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
945                                                                                                 n, i );
946 #endif
947                                         }
948                                 }
949                         } else {
950                                 /* Mark server as "once" */
951                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
952                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
953                         }
954                 }
955         }
956
957         /* Initialize variables */
958         Init_Server_Struct( &New_Server );
959         New_Server_Idx = NONE;
960 #ifdef SSL_SUPPORT
961         ConfSSL_Init();
962 #endif
963
964         Read_Config_File(NGIRCd_ConfFile, fd);
965         fclose(fd);
966
967         if (Conf_IncludeDir[0]) {
968                 dh = opendir(Conf_IncludeDir);
969                 if (!dh)
970                         Config_Error(LOG_ALERT,
971                                      "Can't open include directory \"%s\": %s",
972                                      Conf_IncludeDir, strerror(errno));
973         } else {
974                 strlcpy(Conf_IncludeDir, SYSCONFDIR, sizeof(Conf_IncludeDir));
975                 strlcat(Conf_IncludeDir, CONFIG_DIR, sizeof(Conf_IncludeDir));
976                 dh = opendir(Conf_IncludeDir);
977         }
978
979         /* Include further configuration files, if IncludeDir is available */
980         if (dh) {
981                 while ((entry = readdir(dh)) != NULL) {
982                         ptr = strrchr(entry->d_name, '.');
983                         if (!ptr || strcasecmp(ptr, ".conf") != 0)
984                                 continue;
985                         snprintf(file, sizeof(file), "%s/%s",
986                                  Conf_IncludeDir, entry->d_name);
987                         if (TestOnly)
988                                 Config_Error(LOG_INFO,
989                                              "Reading configuration from \"%s\" ...",
990                                              file);
991                         fd = fopen(file, "r");
992                         if (fd) {
993                                 Read_Config_File(file, fd);
994                                 fclose(fd);
995                         } else
996                                 Config_Error(LOG_ALERT,
997                                              "Can't read configuration \"%s\": %s",
998                                              file, strerror(errno));
999                 }
1000                 closedir(dh);
1001         }
1002
1003         /* Check if there is still a server to add */
1004         if( New_Server.name[0] ) {
1005                 /* Copy data to "real" server structure */
1006                 assert( New_Server_Idx > NONE );
1007                 Conf_Server[New_Server_Idx] = New_Server;
1008         }
1009
1010         /* not a single listening port? Add default. */
1011         if (no_listenports() &&
1012                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
1013         {
1014                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
1015                                         (unsigned int) defaultport, strerror(errno));
1016
1017                 exit(1);
1018         }
1019
1020         if (!Conf_ListenAddress)
1021                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
1022
1023         if (!Conf_ListenAddress) {
1024                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1025                 exit(1);
1026         }
1027
1028         /* No MOTD phrase configured? (re)try motd file. */
1029         if (array_bytes(&Conf_Motd) == 0) {
1030                 if (Read_TextFile(Conf_MotdFile, "MOTD", &Conf_Motd))
1031                         Using_MotdFile = true;
1032         }
1033
1034         /* Try to read ngIRCd help text file. */
1035         (void)Read_TextFile(Conf_HelpFile, "help text", &Conf_Helptext);
1036         if (!array_bytes(&Conf_Helptext))
1037                 Config_Error(LOG_WARNING,
1038                     "No help text available, HELP command will be of limited use.");
1039
1040 #ifdef SSL_SUPPORT
1041         /* Make sure that all SSL-related files are readable */
1042         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1043         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1044         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1045
1046         /* Set the default ciphers if none were configured */
1047         if (!Conf_SSLOptions.CipherList)
1048                 Conf_SSLOptions.CipherList = strdup_warn(DEFAULT_CIPHERS);
1049 #endif
1050
1051         return true;
1052 }
1053
1054 /**
1055  * ...
1056  */
1057 static void Read_Config_File(const char *File, FILE *fd)
1058 {
1059         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
1060         int i, line = 0;
1061         size_t count;
1062
1063         /* Read configuration file */
1064         section[0] = '\0';
1065         while (true) {
1066                 if (!fgets(str, sizeof(str), fd))
1067                         break;
1068                 ngt_TrimStr(str);
1069                 line++;
1070
1071                 /* Skip comments and empty lines */
1072                 if (str[0] == ';' || str[0] == '#' || str[0] == '\0')
1073                         continue;
1074
1075                 if (strlen(str) >= sizeof(str) - 1) {
1076                         Config_Error(LOG_WARNING, "%s, line %d too long!",
1077                                      File, line);
1078                         continue;
1079                 }
1080
1081                 /* Is this the beginning of a new section? */
1082                 if ((str[0] == '[') && (str[strlen(str) - 1] == ']')) {
1083                         strlcpy(section, str, sizeof(section));
1084                         if (strcasecmp(section, "[GLOBAL]") == 0
1085                             || strcasecmp(section, "[LIMITS]") == 0
1086                             || strcasecmp(section, "[OPTIONS]") == 0
1087 #ifdef SSL_SUPPORT
1088                             || strcasecmp(section, "[SSL]") == 0
1089 #endif
1090                             )
1091                                 continue;
1092
1093                         if (strcasecmp(section, "[SERVER]") == 0) {
1094                                 /* Check if there is already a server to add */
1095                                 if (New_Server.name[0]) {
1096                                         /* Copy data to "real" server structure */
1097                                         assert(New_Server_Idx > NONE);
1098                                         Conf_Server[New_Server_Idx] =
1099                                         New_Server;
1100                                 }
1101
1102                                 /* Re-init structure for new server */
1103                                 Init_Server_Struct(&New_Server);
1104
1105                                 /* Search unused item in server configuration structure */
1106                                 for (i = 0; i < MAX_SERVERS; i++) {
1107                                         /* Is this item used? */
1108                                         if (!Conf_Server[i].name[0])
1109                                                 break;
1110                                 }
1111                                 if (i >= MAX_SERVERS) {
1112                                         /* Oops, no free item found! */
1113                                         Config_Error(LOG_ERR,
1114                                                      "Too many servers configured.");
1115                                         New_Server_Idx = NONE;
1116                                 } else
1117                                         New_Server_Idx = i;
1118                                 continue;
1119                         }
1120
1121                         if (strcasecmp(section, "[CHANNEL]") == 0) {
1122                                 count = array_length(&Conf_Channels,
1123                                                      sizeof(struct
1124                                                             Conf_Channel));
1125                                 if (!array_alloc
1126                                     (&Conf_Channels,
1127                                      sizeof(struct Conf_Channel), count)) {
1128                                             Config_Error(LOG_ERR,
1129                                                          "Could not allocate memory for new operator (line %d)",
1130                                                          line);
1131                                     }
1132                                 continue;
1133                         }
1134
1135                         if (strcasecmp(section, "[OPERATOR]") == 0) {
1136                                 count = array_length(&Conf_Opers,
1137                                                      sizeof(struct Conf_Oper));
1138                                 if (!array_alloc(&Conf_Opers,
1139                                                  sizeof(struct Conf_Oper),
1140                                                  count)) {
1141                                         Config_Error(LOG_ERR,
1142                                                      "Could not allocate memory for new channel (line &d)",
1143                                                      line);
1144                                 }
1145                                 continue;
1146                         }
1147
1148                         Config_Error(LOG_ERR,
1149                                      "%s, line %d: Unknown section \"%s\"!",
1150                                      File, line, section);
1151                         section[0] = 0x1;
1152                 }
1153                 if (section[0] == 0x1)
1154                         continue;
1155
1156                 /* Split line into variable name and parameters */
1157                 ptr = strchr(str, '=');
1158                 if (!ptr) {
1159                         Config_Error(LOG_ERR, "%s, line %d: Syntax error!",
1160                                      File, line);
1161                         continue;
1162                 }
1163                 *ptr = '\0';
1164                 var = str;
1165                 ngt_TrimStr(var);
1166                 arg = ptr + 1;
1167                 ngt_TrimStr(arg);
1168
1169                 if (strcasecmp(section, "[GLOBAL]") == 0)
1170                         Handle_GLOBAL(File, line, var, arg);
1171                 else if (strcasecmp(section, "[LIMITS]") == 0)
1172                         Handle_LIMITS(File, line, var, arg);
1173                 else if (strcasecmp(section, "[OPTIONS]") == 0)
1174                         Handle_OPTIONS(File, line, var, arg);
1175 #ifdef SSL_SUPPORT
1176                 else if (strcasecmp(section, "[SSL]") == 0)
1177                         Handle_SSL(File, line, var, arg);
1178 #endif
1179                 else if (strcasecmp(section, "[OPERATOR]") == 0)
1180                         Handle_OPERATOR(File, line, var, arg);
1181                 else if (strcasecmp(section, "[SERVER]") == 0)
1182                         Handle_SERVER(File, line, var, arg);
1183                 else if (strcasecmp(section, "[CHANNEL]") == 0)
1184                         Handle_CHANNEL(File, line, var, arg);
1185                 else
1186                         Config_Error(LOG_ERR,
1187                                      "%s, line %d: Variable \"%s\" outside section!",
1188                                      File, line, var);
1189         }
1190 }
1191
1192 /**
1193  * Check whether a string argument is "true" or "false".
1194  *
1195  * @param Arg   Input string.
1196  * @returns     true if the input string has been parsed as "yes", "true"
1197  *              (case insensitive) or a non-zero integer value.
1198  */
1199 static bool
1200 Check_ArgIsTrue(const char *Arg)
1201 {
1202         if (strcasecmp(Arg, "yes") == 0)
1203                 return true;
1204         if (strcasecmp(Arg, "true") == 0)
1205                 return true;
1206         if (atoi(Arg) != 0)
1207                 return true;
1208
1209         return false;
1210 }
1211
1212 /**
1213  * Handle setting of "MaxNickLength".
1214  *
1215  * @param Line  Line number in configuration file.
1216  * @raram Arg   Input string.
1217  * @returns     New configured maximum nickname length.
1218  */
1219 static unsigned int
1220 Handle_MaxNickLength(const char *File, int Line, const char *Arg)
1221 {
1222         unsigned new;
1223
1224         new = (unsigned) atoi(Arg) + 1;
1225         if (new > CLIENT_NICK_LEN) {
1226                 Config_Error(LOG_WARNING,
1227                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1228                              File, Line, CLIENT_NICK_LEN - 1);
1229                 return CLIENT_NICK_LEN;
1230         }
1231         if (new < 2) {
1232                 Config_Error(LOG_WARNING,
1233                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1234                              File, Line);
1235                 return 2;
1236         }
1237         return new;
1238 }
1239
1240 /**
1241  * Output a warning messages if IDENT is configured but not compiled in.
1242  */
1243 static void
1244 WarnIdent(const char UNUSED *File, int UNUSED Line)
1245 {
1246 #ifndef IDENTAUTH
1247         if (Conf_Ident) {
1248                 /* user has enabled ident lookups explicitly, but ... */
1249                 Config_Error(LOG_WARNING,
1250                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1251                         File, Line);
1252         }
1253 #endif
1254 }
1255
1256 /**
1257  * Output a warning messages if IPv6 is configured but not compiled in.
1258  */
1259 static void
1260 WarnIPv6(const char UNUSED *File, int UNUSED Line)
1261 {
1262 #ifndef WANT_IPV6
1263         if (Conf_ConnectIPv6) {
1264                 /* user has enabled IPv6 explicitly, but ... */
1265                 Config_Error(LOG_WARNING,
1266                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1267                         File, Line);
1268         }
1269 #endif
1270 }
1271
1272 /**
1273  * Output a warning messages if PAM is configured but not compiled in.
1274  */
1275 static void
1276 WarnPAM(const char UNUSED *File, int UNUSED Line)
1277 {
1278 #ifndef PAM
1279         if (Conf_PAM) {
1280                 Config_Error(LOG_WARNING,
1281                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1282                         File, Line);
1283         }
1284 #endif
1285 }
1286
1287 /**
1288  * Handle legacy "NoXXX" options in [GLOBAL] section.
1289  *
1290  * TODO: This function and support for "NoXXX" could be removed starting
1291  * with ngIRCd release 19 (one release after marking it "deprecated").
1292  *
1293  * @param Var   Variable name.
1294  * @param Arg   Argument string.
1295  * @returns     true if a NoXXX option has been processed; false otherwise.
1296  */
1297 static bool
1298 CheckLegacyNoOption(const char *Var, const char *Arg)
1299 {
1300         if(strcasecmp(Var, "NoDNS") == 0) {
1301                 Conf_DNS = !Check_ArgIsTrue( Arg );
1302                 return true;
1303         }
1304         if (strcasecmp(Var, "NoIdent") == 0) {
1305                 Conf_Ident = !Check_ArgIsTrue(Arg);
1306                 return true;
1307         }
1308         if(strcasecmp(Var, "NoPAM") == 0) {
1309                 Conf_PAM = !Check_ArgIsTrue(Arg);
1310                 return true;
1311         }
1312         return false;
1313 }
1314
1315 /**
1316  * Handle deprecated legacy options in [GLOBAL] section.
1317  *
1318  * TODO: This function and support for these options in the [Global] section
1319  * could be removed starting with ngIRCd release 19 (one release after
1320  * marking it "deprecated").
1321  *
1322  * @param Var   Variable name.
1323  * @param Arg   Argument string.
1324  * @returns     true if a legacy option has been processed; false otherwise.
1325  */
1326 static const char*
1327 CheckLegacyGlobalOption(const char *File, int Line, char *Var, char *Arg)
1328 {
1329         if (strcasecmp(Var, "AllowRemoteOper") == 0
1330             || strcasecmp(Var, "ChrootDir") == 0
1331             || strcasecmp(Var, "ConnectIPv4") == 0
1332             || strcasecmp(Var, "ConnectIPv6") == 0
1333             || strcasecmp(Var, "OperCanUseMode") == 0
1334             || strcasecmp(Var, "OperChanPAutoOp") == 0
1335             || strcasecmp(Var, "OperServerMode") == 0
1336             || strcasecmp(Var, "PredefChannelsOnly") == 0
1337             || strcasecmp(Var, "SyslogFacility") == 0
1338             || strcasecmp(Var, "WebircPassword") == 0) {
1339                 Handle_OPTIONS(File, Line, Var, Arg);
1340                 return "[Options]";
1341         }
1342         if (strcasecmp(Var, "ConnectRetry") == 0
1343             || strcasecmp(Var, "IdleTimeout") == 0
1344             || strcasecmp(Var, "MaxConnections") == 0
1345             || strcasecmp(Var, "MaxConnectionsIP") == 0
1346             || strcasecmp(Var, "MaxJoins") == 0
1347             || strcasecmp(Var, "MaxNickLength") == 0
1348             || strcasecmp(Var, "PingTimeout") == 0
1349             || strcasecmp(Var, "PongTimeout") == 0) {
1350                 Handle_LIMITS(File, Line, Var, Arg);
1351                 return "[Limits]";
1352         }
1353 #ifdef SSL_SUPPORT
1354         if (strcasecmp(Var, "SSLCertFile") == 0
1355             || strcasecmp(Var, "SSLDHFile") == 0
1356             || strcasecmp(Var, "SSLKeyFile") == 0
1357             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1358             || strcasecmp(Var, "SSLPorts") == 0) {
1359                 Handle_SSL(File, Line, Var + 3, Arg);
1360                 return "[SSL]";
1361         }
1362 #endif
1363
1364         return NULL;
1365 }
1366
1367 /**
1368  * Strip "no" prefix of a string.
1369  *
1370  * TODO: This function and support for "NoXXX" should be removed starting
1371  * with ngIRCd release 19! (One release after marking it "deprecated").
1372  *
1373  * @param str   Pointer to input string starting with "no".
1374  * @returns     New pointer to string without "no" prefix.
1375  */
1376 static const char *
1377 NoNo(const char *str)
1378 {
1379         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1380         return str + 2;
1381 }
1382
1383 /**
1384  * Invert "boolean" string.
1385  *
1386  * TODO: This function and support for "NoXXX" should be removed starting
1387  * with ngIRCd release 19! (One release after marking it "deprecated").
1388  *
1389  * @param arg   "Boolean" input string.
1390  * @returns     Pointer to inverted "boolean string".
1391  */
1392 static const char *
1393 InvertArg(const char *arg)
1394 {
1395         return yesno_to_str(!Check_ArgIsTrue(arg));
1396 }
1397
1398 /**
1399  * Handle variable in [Global] configuration section.
1400  *
1401  * @param Line  Line numer in configuration file.
1402  * @param Var   Variable name.
1403  * @param Arg   Variable argument.
1404  */
1405 static void
1406 Handle_GLOBAL(const char *File, int Line, char *Var, char *Arg )
1407 {
1408         struct passwd *pwd;
1409         struct group *grp;
1410         size_t len;
1411         const char *section;
1412
1413         assert(File != NULL);
1414         assert(Line > 0);
1415         assert(Var != NULL);
1416         assert(Arg != NULL);
1417
1418         if (strcasecmp(Var, "Name") == 0) {
1419                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1420                 if (len >= sizeof(Conf_ServerName))
1421                         Config_Error_TooLong(File, Line, Var);
1422                 return;
1423         }
1424         if (strcasecmp(Var, "AdminInfo1") == 0) {
1425                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1426                 if (len >= sizeof(Conf_ServerAdmin1))
1427                         Config_Error_TooLong(File, Line, Var);
1428                 return;
1429         }
1430         if (strcasecmp(Var, "AdminInfo2") == 0) {
1431                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1432                 if (len >= sizeof(Conf_ServerAdmin2))
1433                         Config_Error_TooLong(File, Line, Var);
1434                 return;
1435         }
1436         if (strcasecmp(Var, "AdminEMail") == 0) {
1437                 len = strlcpy(Conf_ServerAdminMail, Arg,
1438                         sizeof(Conf_ServerAdminMail));
1439                 if (len >= sizeof(Conf_ServerAdminMail))
1440                         Config_Error_TooLong(File, Line, Var);
1441                 return;
1442         }
1443         if (strcasecmp(Var, "Info") == 0) {
1444                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1445                 if (len >= sizeof(Conf_ServerInfo))
1446                         Config_Error_TooLong(File, Line, Var);
1447                 return;
1448         }
1449         if (strcasecmp(Var, "HelpFile") == 0) {
1450                 len = strlcpy(Conf_HelpFile, Arg, sizeof(Conf_HelpFile));
1451                 if (len >= sizeof(Conf_HelpFile))
1452                         Config_Error_TooLong(File, Line, Var);
1453                 return;
1454         }
1455         if (strcasecmp(Var, "Listen") == 0) {
1456                 if (Conf_ListenAddress) {
1457                         Config_Error(LOG_ERR,
1458                                      "Multiple Listen= options, ignoring: %s",
1459                                      Arg);
1460                         return;
1461                 }
1462                 Conf_ListenAddress = strdup_warn(Arg);
1463                 /* If allocation fails, we're in trouble: we cannot ignore the
1464                  * error -- otherwise ngircd would listen on all interfaces. */
1465                 if (!Conf_ListenAddress) {
1466                         Config_Error(LOG_ALERT,
1467                                      "%s exiting due to fatal errors!",
1468                                      PACKAGE_NAME);
1469                         exit(1);
1470                 }
1471                 return;
1472         }
1473         if (strcasecmp(Var, "MotdFile") == 0) {
1474                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1475                 if (len >= sizeof(Conf_MotdFile))
1476                         Config_Error_TooLong(File, Line, Var);
1477                 return;
1478         }
1479         if (strcasecmp(Var, "MotdPhrase") == 0) {
1480                 len = strlen(Arg);
1481                 if (len == 0)
1482                         return;
1483                 if (len >= 127) {
1484                         Config_Error_TooLong(File, Line, Var);
1485                         return;
1486                 }
1487                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1488                         Config_Error(LOG_WARNING,
1489                                      "%s, line %d: Could not append MotdPhrase: %s",
1490                                      File, Line, strerror(errno));
1491                 Using_MotdFile = false;
1492                 return;
1493         }
1494         if(strcasecmp(Var, "Password") == 0) {
1495                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1496                 if (len >= sizeof(Conf_ServerPwd))
1497                         Config_Error_TooLong(File, Line, Var);
1498                 return;
1499         }
1500         if (strcasecmp(Var, "PidFile") == 0) {
1501                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1502                 if (len >= sizeof(Conf_PidFile))
1503                         Config_Error_TooLong(File, Line, Var);
1504                 return;
1505         }
1506         if (strcasecmp(Var, "Ports") == 0) {
1507                 ports_parse(&Conf_ListenPorts, File, Line, Arg);
1508                 return;
1509         }
1510         if (strcasecmp(Var, "ServerGID") == 0) {
1511                 grp = getgrnam(Arg);
1512                 if (grp)
1513                         Conf_GID = grp->gr_gid;
1514                 else {
1515                         Conf_GID = (unsigned int)atoi(Arg);
1516                         if (!Conf_GID && strcmp(Arg, "0"))
1517                                 Config_Error(LOG_WARNING,
1518                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1519                                              File, Line, Var);
1520                 }
1521                 return;
1522         }
1523         if (strcasecmp(Var, "ServerUID") == 0) {
1524                 pwd = getpwnam(Arg);
1525                 if (pwd)
1526                         Conf_UID = pwd->pw_uid;
1527                 else {
1528                         Conf_UID = (unsigned int)atoi(Arg);
1529                         if (!Conf_UID && strcmp(Arg, "0"))
1530                                 Config_Error(LOG_WARNING,
1531                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1532                                              File, Line, Var);
1533                 }
1534                 return;
1535         }
1536
1537         if (CheckLegacyNoOption(Var, Arg)) {
1538                 /* TODO: This function and support for "NoXXX" could be
1539                  * be removed starting with ngIRCd release 19 (one release
1540                  * after marking it "deprecated"). */
1541                 Config_Error(LOG_WARNING,
1542                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1543                              File, Line, NoNo(Var), InvertArg(Arg));
1544                 if (strcasecmp(Var, "NoIdent") == 0)
1545                         WarnIdent(File, Line);
1546                 else if (strcasecmp(Var, "NoPam") == 0)
1547                         WarnPAM(File, Line);
1548                 return;
1549         }
1550         if ((section = CheckLegacyGlobalOption(File, Line, Var, Arg))) {
1551                 /** TODO: This function and support for these options in the
1552                  * [Global] section could be removed starting with ngIRCd
1553                  * release 19 (one release after marking it "deprecated"). */
1554                 if (strncasecmp(Var, "SSL", 3) == 0) {
1555                         Config_Error(LOG_WARNING,
1556                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1557                                      File, Line, Var, section,
1558                                      Var + 3);
1559                 } else {
1560                         Config_Error(LOG_WARNING,
1561                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1562                                      File, Line, Var, section);
1563                 }
1564                 return;
1565         }
1566
1567         Config_Error_Section(File, Line, Var, "Global");
1568 }
1569
1570 /**
1571  * Handle variable in [Limits] configuration section.
1572  *
1573  * @param Line  Line numer in configuration file.
1574  * @param Var   Variable name.
1575  * @param Arg   Variable argument.
1576  */
1577 static void
1578 Handle_LIMITS(const char *File, int Line, char *Var, char *Arg)
1579 {
1580         assert(File != NULL);
1581         assert(Line > 0);
1582         assert(Var != NULL);
1583         assert(Arg != NULL);
1584
1585         if (strcasecmp(Var, "ConnectRetry") == 0) {
1586                 Conf_ConnectRetry = atoi(Arg);
1587                 if (Conf_ConnectRetry < 5) {
1588                         Config_Error(LOG_WARNING,
1589                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1590                                      File, Line);
1591                         Conf_ConnectRetry = 5;
1592                 }
1593                 return;
1594         }
1595         if (strcasecmp(Var, "IdleTimeout") == 0) {
1596                 Conf_IdleTimeout = atoi(Arg);
1597                 if (!Conf_IdleTimeout && strcmp(Arg, "0"))
1598                         Config_Error_NaN(File, Line, Var);
1599                 return;
1600         }
1601         if (strcasecmp(Var, "MaxConnections") == 0) {
1602                 Conf_MaxConnections = atoi(Arg);
1603                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1604                         Config_Error_NaN(File, Line, Var);
1605                 return;
1606         }
1607         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1608                 Conf_MaxConnectionsIP = atoi(Arg);
1609                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1610                         Config_Error_NaN(File, Line, Var);
1611                 return;
1612         }
1613         if (strcasecmp(Var, "MaxJoins") == 0) {
1614                 Conf_MaxJoins = atoi(Arg);
1615                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1616                         Config_Error_NaN(File, Line, Var);
1617                 return;
1618         }
1619         if (strcasecmp(Var, "MaxNickLength") == 0) {
1620                 Conf_MaxNickLength = Handle_MaxNickLength(File, Line, Arg);
1621                 return;
1622         }
1623         if (strcasecmp(Var, "MaxListSize") == 0) {
1624                 Conf_MaxListSize = atoi(Arg);
1625                 if (!Conf_MaxListSize && strcmp(Arg, "0"))
1626                         Config_Error_NaN(File, Line, Var);
1627                 return;
1628         }
1629         if (strcasecmp(Var, "PingTimeout") == 0) {
1630                 Conf_PingTimeout = atoi(Arg);
1631                 if (Conf_PingTimeout < 5) {
1632                         Config_Error(LOG_WARNING,
1633                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1634                                      File, Line);
1635                         Conf_PingTimeout = 5;
1636                 }
1637                 return;
1638         }
1639         if (strcasecmp(Var, "PongTimeout") == 0) {
1640                 Conf_PongTimeout = atoi(Arg);
1641                 if (Conf_PongTimeout < 5) {
1642                         Config_Error(LOG_WARNING,
1643                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1644                                      File, Line);
1645                         Conf_PongTimeout = 5;
1646                 }
1647                 return;
1648         }
1649
1650         Config_Error_Section(File, Line, Var, "Limits");
1651 }
1652
1653 /**
1654  * Handle variable in [Options] configuration section.
1655  *
1656  * @param Line  Line numer in configuration file.
1657  * @param Var   Variable name.
1658  * @param Arg   Variable argument.
1659  */
1660 static void
1661 Handle_OPTIONS(const char *File, int Line, char *Var, char *Arg)
1662 {
1663         size_t len;
1664         char *p;
1665
1666         assert(File != NULL);
1667         assert(Line > 0);
1668         assert(Var != NULL);
1669         assert(Arg != NULL);
1670
1671         if (strcasecmp(Var, "AllowedChannelTypes") == 0) {
1672                 p = Arg;
1673                 Conf_AllowedChannelTypes[0] = '\0';
1674                 while (*p) {
1675                         if (strchr(Conf_AllowedChannelTypes, *p)) {
1676                                 /* Prefix is already included; ignore it */
1677                                 p++;
1678                                 continue;
1679                         }
1680
1681                         if (strchr(CHANTYPES, *p)) {
1682                                 len = strlen(Conf_AllowedChannelTypes) + 1;
1683                                 assert(len < sizeof(Conf_AllowedChannelTypes));
1684                                 Conf_AllowedChannelTypes[len - 1] = *p;
1685                                 Conf_AllowedChannelTypes[len] = '\0';
1686                         } else {
1687                                 Config_Error(LOG_WARNING,
1688                                              "%s, line %d: Unknown channel prefix \"%c\" in \"AllowedChannelTypes\"!",
1689                                              File, Line, *p);
1690                         }
1691                         p++;
1692                 }
1693                 return;
1694         }
1695         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1696                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1697                 return;
1698         }
1699         if (strcasecmp(Var, "ChrootDir") == 0) {
1700                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1701                 if (len >= sizeof(Conf_Chroot))
1702                         Config_Error_TooLong(File, Line, Var);
1703                 return;
1704         }
1705         if (strcasecmp(Var, "CloakHost") == 0) {
1706                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1707                 if (len >= sizeof(Conf_CloakHost))
1708                         Config_Error_TooLong(File, Line, Var);
1709                 return;
1710         }
1711         if (strcasecmp(Var, "CloakHostModeX") == 0) {
1712                 len = strlcpy(Conf_CloakHostModeX, Arg, sizeof(Conf_CloakHostModeX));
1713                 if (len >= sizeof(Conf_CloakHostModeX))
1714                         Config_Error_TooLong(File, Line, Var);
1715                 return;
1716         }
1717         if (strcasecmp(Var, "CloakHostSalt") == 0) {
1718                 len = strlcpy(Conf_CloakHostSalt, Arg, sizeof(Conf_CloakHostSalt));
1719                 if (len >= sizeof(Conf_CloakHostSalt))
1720                         Config_Error_TooLong(File, Line, Var);
1721                 return;
1722         }
1723         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1724                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1725                 return;
1726         }
1727         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1728                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1729                 WarnIPv6(File, Line);
1730                 return;
1731         }
1732         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1733                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1734                 return;
1735         }
1736         if (strcasecmp(Var, "DefaultUserModes") == 0) {
1737                 p = Arg;
1738                 Conf_DefaultUserModes[0] = '\0';
1739                 while (*p) {
1740                         if (strchr(Conf_DefaultUserModes, *p)) {
1741                                 /* Mode is already included; ignore it */
1742                                 p++;
1743                                 continue;
1744                         }
1745
1746                         if (strchr(USERMODES, *p)) {
1747                                 len = strlen(Conf_DefaultUserModes) + 1;
1748                                 assert(len < sizeof(Conf_DefaultUserModes));
1749                                 Conf_DefaultUserModes[len - 1] = *p;
1750                                 Conf_DefaultUserModes[len] = '\0';
1751                         } else {
1752                                 Config_Error(LOG_WARNING,
1753                                              "%s, line %d: Unknown user mode \"%c\" in \"DefaultUserModes\"!",
1754                                              File, Line, *p);
1755                         }
1756                         p++;
1757                 }
1758                 return;
1759         }
1760         if (strcasecmp(Var, "DNS") == 0) {
1761                 Conf_DNS = Check_ArgIsTrue(Arg);
1762                 return;
1763         }
1764         if (strcasecmp(Var, "Ident") == 0) {
1765                 Conf_Ident = Check_ArgIsTrue(Arg);
1766                 WarnIdent(File, Line);
1767                 return;
1768         }
1769         if (strcasecmp(Var, "IncludeDir") == 0) {
1770                 if (Conf_IncludeDir[0]) {
1771                         Config_Error(LOG_ERR,
1772                                      "%s, line %d: Can't overwrite value of \"IncludeDir\" variable!",
1773                                      File, Line);
1774                         return;
1775                 }
1776                 len = strlcpy(Conf_IncludeDir, Arg, sizeof(Conf_IncludeDir));
1777                 if (len >= sizeof(Conf_IncludeDir))
1778                         Config_Error_TooLong(File, Line, Var);
1779                 return;
1780         }
1781         if (strcasecmp(Var, "MorePrivacy") == 0) {
1782                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1783                 return;
1784         }
1785         if (strcasecmp(Var, "NoticeAuth") == 0) {
1786                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1787                 return;
1788         }
1789         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1790                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1791                 return;
1792         }
1793         if (strcasecmp(Var, "OperChanPAutoOp") == 0) {
1794                 Conf_OperChanPAutoOp = Check_ArgIsTrue(Arg);
1795                 return;
1796         }
1797         if (strcasecmp(Var, "OperServerMode") == 0) {
1798                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1799                 return;
1800         }
1801         if (strcasecmp(Var, "PAM") == 0) {
1802                 Conf_PAM = Check_ArgIsTrue(Arg);
1803                 WarnPAM(File, Line);
1804                 return;
1805         }
1806         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1807                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1808                 return;
1809         }
1810         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1811                 /*
1812                  * TODO: This section and support for "PredefChannelsOnly"
1813                  * could be removed starting with ngIRCd release 22 (one
1814                  * release after marking it "deprecated") ...
1815                  */
1816                 Config_Error(LOG_WARNING,
1817                              "%s, line %d (section \"Options\"): \"%s\" is deprecated, please use \"AllowedChannelTypes\"!",
1818                              File, Line, Var);
1819                 if (Check_ArgIsTrue(Arg))
1820                         Conf_AllowedChannelTypes[0] = '\0';
1821                 else
1822                         strlcpy(Conf_AllowedChannelTypes, CHANTYPES,
1823                                 sizeof(Conf_AllowedChannelTypes));
1824                 return;
1825         }
1826 #ifndef STRICT_RFC
1827         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1828                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1829                 return;
1830         }
1831 #endif
1832         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1833                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1834                 return;
1835         }
1836 #ifdef SYSLOG
1837         if (strcasecmp(Var, "SyslogFacility") == 0) {
1838                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1839                                                            Conf_SyslogFacility);
1840                 return;
1841         }
1842 #endif
1843         if (strcasecmp(Var, "WebircPassword") == 0) {
1844                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1845                 if (len >= sizeof(Conf_WebircPwd))
1846                         Config_Error_TooLong(File, Line, Var);
1847                 return;
1848         }
1849
1850         Config_Error_Section(File, Line, Var, "Options");
1851 }
1852
1853 #ifdef SSL_SUPPORT
1854
1855 /**
1856  * Handle variable in [SSL] configuration section.
1857  *
1858  * @param Line  Line numer in configuration file.
1859  * @param Var   Variable name.
1860  * @param Arg   Variable argument.
1861  */
1862 static void
1863 Handle_SSL(const char *File, int Line, char *Var, char *Arg)
1864 {
1865         assert(File != NULL);
1866         assert(Line > 0);
1867         assert(Var != NULL);
1868         assert(Arg != NULL);
1869
1870         if (strcasecmp(Var, "CertFile") == 0) {
1871                 assert(Conf_SSLOptions.CertFile == NULL);
1872                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1873                 return;
1874         }
1875         if (strcasecmp(Var, "DHFile") == 0) {
1876                 assert(Conf_SSLOptions.DHFile == NULL);
1877                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1878                 return;
1879         }
1880         if (strcasecmp(Var, "KeyFile") == 0) {
1881                 assert(Conf_SSLOptions.KeyFile == NULL);
1882                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1883                 return;
1884         }
1885         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1886                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1887                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1888                         Config_Error(LOG_ERR,
1889                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1890                                      File, Line, Var, strerror(errno));
1891                 return;
1892         }
1893         if (strcasecmp(Var, "Ports") == 0) {
1894                 ports_parse(&Conf_SSLOptions.ListenPorts, File, Line, Arg);
1895                 return;
1896         }
1897         if (strcasecmp(Var, "CipherList") == 0) {
1898                 assert(Conf_SSLOptions.CipherList == NULL);
1899                 Conf_SSLOptions.CipherList = strdup_warn(Arg);
1900                 return;
1901         }
1902
1903         Config_Error_Section(File, Line, Var, "SSL");
1904 }
1905
1906 #endif
1907
1908 /**
1909  * Handle variable in [Operator] configuration section.
1910  *
1911  * @param Line  Line numer in configuration file.
1912  * @param Var   Variable name.
1913  * @param Arg   Variable argument.
1914  */
1915 static void
1916 Handle_OPERATOR(const char *File, int Line, char *Var, char *Arg )
1917 {
1918         size_t len;
1919         struct Conf_Oper *op;
1920
1921         assert( File != NULL );
1922         assert( Line > 0 );
1923         assert( Var != NULL );
1924         assert( Arg != NULL );
1925
1926         op = array_get(&Conf_Opers, sizeof(*op),
1927                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1928         if (!op)
1929                 return;
1930
1931         if (strcasecmp(Var, "Name") == 0) {
1932                 /* Name of IRC operator */
1933                 len = strlcpy(op->name, Arg, sizeof(op->name));
1934                 if (len >= sizeof(op->name))
1935                                 Config_Error_TooLong(File, Line, Var);
1936                 return;
1937         }
1938         if (strcasecmp(Var, "Password") == 0) {
1939                 /* Password of IRC operator */
1940                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1941                 if (len >= sizeof(op->pwd))
1942                                 Config_Error_TooLong(File, Line, Var);
1943                 return;
1944         }
1945         if (strcasecmp(Var, "Mask") == 0) {
1946                 if (op->mask)
1947                         return; /* Hostname already configured */
1948                 op->mask = strdup_warn( Arg );
1949                 return;
1950         }
1951
1952         Config_Error_Section(File, Line, Var, "Operator");
1953 }
1954
1955 /**
1956  * Handle variable in [Server] configuration section.
1957  *
1958  * @param Line  Line numer in configuration file.
1959  * @param Var   Variable name.
1960  * @param Arg   Variable argument.
1961  */
1962 static void
1963 Handle_SERVER(const char *File, int Line, char *Var, char *Arg )
1964 {
1965         long port;
1966         size_t len;
1967
1968         assert( File != NULL );
1969         assert( Line > 0 );
1970         assert( Var != NULL );
1971         assert( Arg != NULL );
1972
1973         /* Ignore server block if no space is left in server configuration structure */
1974         if( New_Server_Idx <= NONE ) return;
1975
1976         if( strcasecmp( Var, "Host" ) == 0 ) {
1977                 /* Hostname of the server */
1978                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1979                 if (len >= sizeof( New_Server.host ))
1980                         Config_Error_TooLong(File, Line, Var);
1981                 return;
1982         }
1983         if( strcasecmp( Var, "Name" ) == 0 ) {
1984                 /* Name of the server ("Nick"/"ID") */
1985                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1986                 if (len >= sizeof( New_Server.name ))
1987                         Config_Error_TooLong(File, Line, Var);
1988                 return;
1989         }
1990         if (strcasecmp(Var, "Bind") == 0) {
1991                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1992                         return;
1993
1994                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1995                              File, Line, Arg);
1996                 return;
1997         }
1998         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1999                 /* Password of this server which is sent to the peer */
2000                 if (*Arg == ':') {
2001                         Config_Error(LOG_ERR,
2002                                      "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
2003                                      File, Line);
2004                 }
2005                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
2006                 if (len >= sizeof( New_Server.pwd_in ))
2007                         Config_Error_TooLong(File, Line, Var);
2008                 return;
2009         }
2010         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
2011                 /* Passwort of the peer which must be received */
2012                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
2013                 if (len >= sizeof( New_Server.pwd_out ))
2014                         Config_Error_TooLong(File, Line, Var);
2015                 return;
2016         }
2017         if( strcasecmp( Var, "Port" ) == 0 ) {
2018                 /* Port to which this server should connect */
2019                 port = atol( Arg );
2020                 if (port >= 0 && port < 0xFFFF)
2021                         New_Server.port = (UINT16)port;
2022                 else
2023                         Config_Error(LOG_ERR,
2024                                      "%s, line %d (section \"Server\"): Illegal port number %ld!",
2025                                      File, Line, port );
2026                 return;
2027         }
2028 #ifdef SSL_SUPPORT
2029         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
2030                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
2031                 return;
2032         }
2033 #endif
2034         if( strcasecmp( Var, "Group" ) == 0 ) {
2035                 /* Server group */
2036                 New_Server.group = atoi( Arg );
2037                 if (!New_Server.group && strcmp(Arg, "0"))
2038                         Config_Error_NaN(File, Line, Var);
2039                 return;
2040         }
2041         if( strcasecmp( Var, "Passive" ) == 0 ) {
2042                 if (Check_ArgIsTrue(Arg))
2043                         New_Server.flags |= CONF_SFLAG_DISABLED;
2044                 return;
2045         }
2046         if (strcasecmp(Var, "ServiceMask") == 0) {
2047                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
2048                               sizeof(New_Server.svs_mask));
2049                 if (len >= sizeof(New_Server.svs_mask))
2050                         Config_Error_TooLong(File, Line, Var);
2051                 return;
2052         }
2053
2054         Config_Error_Section(File, Line, Var, "Server");
2055 }
2056
2057 /**
2058  * Copy channel name into channel structure.
2059  *
2060  * If the channel name is not valid because of a missing prefix ('#', '&'),
2061  * a default prefix of '#' will be added.
2062  *
2063  * @param new_chan      New already allocated channel structure.
2064  * @param name          Name of the new channel.
2065  * @returns             true on success, false otherwise.
2066  */
2067 static bool
2068 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
2069 {
2070         size_t size = sizeof(new_chan->name);
2071         char *dest = new_chan->name;
2072
2073         if (!Channel_IsValidName(name)) {
2074                 /*
2075                  * maybe user forgot to add a '#'.
2076                  * This is only here for user convenience.
2077                  */
2078                 *dest = '#';
2079                 --size;
2080                 ++dest;
2081         }
2082         return size > strlcpy(dest, name, size);
2083 }
2084
2085 /**
2086  * Handle variable in [Channel] configuration section.
2087  *
2088  * @param Line  Line numer in configuration file.
2089  * @param Var   Variable name.
2090  * @param Arg   Variable argument.
2091  */
2092 static void
2093 Handle_CHANNEL(const char *File, int Line, char *Var, char *Arg)
2094 {
2095         size_t len;
2096         struct Conf_Channel *chan;
2097
2098         assert( File != NULL );
2099         assert( Line > 0 );
2100         assert( Var != NULL );
2101         assert( Arg != NULL );
2102
2103         chan = array_get(&Conf_Channels, sizeof(*chan),
2104                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
2105         if (!chan)
2106                 return;
2107
2108         if (strcasecmp(Var, "Name") == 0) {
2109                 if (!Handle_Channelname(chan, Arg))
2110                         Config_Error_TooLong(File, Line, Var);
2111                 return;
2112         }
2113         if (strcasecmp(Var, "Modes") == 0) {
2114                 /* Initial modes */
2115                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
2116                 if (len >= sizeof(chan->modes))
2117                         Config_Error_TooLong(File, Line, Var);
2118                 return;
2119         }
2120         if( strcasecmp( Var, "Topic" ) == 0 ) {
2121                 /* Initial topic */
2122                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
2123                 if (len >= sizeof(chan->topic))
2124                         Config_Error_TooLong(File, Line, Var);
2125                 return;
2126         }
2127         if( strcasecmp( Var, "Key" ) == 0 ) {
2128                 /* Initial Channel Key (mode k) */
2129                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
2130                 if (len >= sizeof(chan->key))
2131                         Config_Error_TooLong(File, Line, Var);
2132                 return;
2133         }
2134         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
2135                 /* maximum user limit, mode l */
2136                 chan->maxusers = (unsigned long) atol(Arg);
2137                 if (!chan->maxusers && strcmp(Arg, "0"))
2138                         Config_Error_NaN(File, Line, Var);
2139                 return;
2140         }
2141         if (strcasecmp(Var, "KeyFile") == 0) {
2142                 /* channel keys */
2143                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
2144                 if (len >= sizeof(chan->keyfile))
2145                         Config_Error_TooLong(File, Line, Var);
2146                 return;
2147         }
2148
2149         Config_Error_Section(File, Line, Var, "Channel");
2150 }
2151
2152 /**
2153  * Validate server configuration.
2154  *
2155  * Please note that this function uses exit(1) on fatal errors and therefore
2156  * can result in ngIRCd terminating!
2157  *
2158  * @param Configtest    true if the daemon has been called with "--configtest".
2159  * @param Rehash        true if re-reading configuration on runtime.
2160  * @returns             true if configuration is valid.
2161  */
2162 static bool
2163 Validate_Config(bool Configtest, bool Rehash)
2164 {
2165         /* Validate configuration settings. */
2166
2167 #ifdef DEBUG
2168         int i, servers, servers_once;
2169 #endif
2170         bool config_valid = true;
2171         char *ptr;
2172
2173         /* Emit a warning when the config file is not a full path name */
2174         if (NGIRCd_ConfFile[0] && NGIRCd_ConfFile[0] != '/') {
2175                 Config_Error(LOG_WARNING,
2176                         "Not specifying a full path name to \"%s\" can cause problems when rehashing the server!",
2177                         NGIRCd_ConfFile);
2178         }
2179
2180         /* Validate configured server name, see RFC 2812 section 2.3.1 */
2181         ptr = Conf_ServerName;
2182         do {
2183                 if (*ptr >= 'a' && *ptr <= 'z') continue;
2184                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
2185                 if (*ptr >= '0' && *ptr <= '9') continue;
2186                 if (ptr > Conf_ServerName) {
2187                         if (*ptr == '.' || *ptr == '-')
2188                                 continue;
2189                 }
2190                 Conf_ServerName[0] = '\0';
2191                 break;
2192         } while (*(++ptr));
2193
2194         if (!Conf_ServerName[0]) {
2195                 /* No server name configured! */
2196                 config_valid = false;
2197                 Config_Error(LOG_ALERT,
2198                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
2199                              NGIRCd_ConfFile);
2200                 if (!Configtest && !Rehash) {
2201                         Config_Error(LOG_ALERT,
2202                                      "%s exiting due to fatal errors!",
2203                                      PACKAGE_NAME);
2204                         exit(1);
2205                 }
2206         }
2207
2208         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
2209                 /* No dot in server name! */
2210                 config_valid = false;
2211                 Config_Error(LOG_ALERT,
2212                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
2213                              NGIRCd_ConfFile);
2214                 if (!Configtest) {
2215                         Config_Error(LOG_ALERT,
2216                                      "%s exiting due to fatal errors!",
2217                                      PACKAGE_NAME);
2218                         exit(1);
2219                 }
2220         }
2221
2222 #ifdef STRICT_RFC
2223         if (!Conf_ServerAdminMail[0]) {
2224                 /* No administrative contact configured! */
2225                 config_valid = false;
2226                 Config_Error(LOG_ALERT,
2227                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
2228                              NGIRCd_ConfFile);
2229                 if (!Configtest) {
2230                         Config_Error(LOG_ALERT,
2231                                      "%s exiting due to fatal errors!",
2232                                      PACKAGE_NAME);
2233                         exit(1);
2234                 }
2235         }
2236 #endif
2237
2238         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
2239             && !Conf_ServerAdminMail[0]) {
2240                 /* No administrative information configured! */
2241                 Config_Error(LOG_WARNING,
2242                              "No administrative information configured but required by RFC!");
2243         }
2244
2245 #ifdef PAM
2246         if (Conf_ServerPwd[0])
2247                 Config_Error(LOG_ERR,
2248                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
2249 #endif
2250
2251 #ifdef DEBUG
2252         servers = servers_once = 0;
2253         for (i = 0; i < MAX_SERVERS; i++) {
2254                 if (Conf_Server[i].name[0]) {
2255                         servers++;
2256                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
2257                                 servers_once++;
2258                 }
2259         }
2260         Log(LOG_DEBUG,
2261             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
2262             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
2263             servers, servers_once,
2264             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
2265 #endif
2266
2267         return config_valid;
2268 }
2269
2270 /**
2271  * Output "line too long" warning.
2272  *
2273  * @param Line  Line number in configuration file.
2274  * @param Item  Affected variable name.
2275  */
2276 static void
2277 Config_Error_TooLong(const char *File, const int Line, const char *Item)
2278 {
2279         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" too long!",
2280                      File, Line, Item );
2281 }
2282
2283 /**
2284  * Output "unknown variable" warning.
2285  *
2286  * @param Line          Line number in configuration file.
2287  * @param Item          Affected variable name.
2288  * @param Section       Section name.
2289  */
2290 static void
2291 Config_Error_Section(const char *File, const int Line, const char *Item,
2292                      const char *Section)
2293 {
2294         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
2295                      File, Line, Section, Item);
2296 }
2297
2298 /**
2299  * Output "not a number" warning.
2300  *
2301  * @param Line  Line number in configuration file.
2302  * @param Item  Affected variable name.
2303  */
2304 static void
2305 Config_Error_NaN(const char *File, const int Line, const char *Item )
2306 {
2307         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
2308                      File, Line, Item );
2309 }
2310
2311 /**
2312  * Output configuration error to console and/or logfile.
2313  *
2314  * On runtime, the normal log functions of the daemon are used. But when
2315  * testing the configuration ("--configtest"), all messages go directly
2316  * to the console.
2317  *
2318  * @param Level         Severity level of the message.
2319  * @param Format        Format string; see printf() function.
2320  */
2321 #ifdef PROTOTYPES
2322 static void Config_Error( const int Level, const char *Format, ... )
2323 #else
2324 static void Config_Error( Level, Format, va_alist )
2325 const int Level;
2326 const char *Format;
2327 va_dcl
2328 #endif
2329 {
2330         char msg[MAX_LOG_MSG_LEN];
2331         va_list ap;
2332
2333         assert( Format != NULL );
2334
2335 #ifdef PROTOTYPES
2336         va_start( ap, Format );
2337 #else
2338         va_start( ap );
2339 #endif
2340         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2341         va_end( ap );
2342
2343         if (!Use_Log) {
2344                 if (Level <= LOG_WARNING)
2345                         printf(" - %s\n", msg);
2346                 else
2347                         puts(msg);
2348         } else
2349                 Log(Level, "%s", msg);
2350 }
2351
2352 #ifdef DEBUG
2353
2354 /**
2355  * Dump internal state of the "configuration module".
2356  */
2357 GLOBAL void
2358 Conf_DebugDump(void)
2359 {
2360         int i;
2361
2362         Log(LOG_DEBUG, "Configured servers:");
2363         for (i = 0; i < MAX_SERVERS; i++) {
2364                 if (! Conf_Server[i].name[0])
2365                         continue;
2366                 Log(LOG_DEBUG,
2367                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2368                     Conf_Server[i].name, Conf_Server[i].host,
2369                     Conf_Server[i].port, Conf_Server[i].lasttry,
2370                     Conf_Server[i].group, Conf_Server[i].flags,
2371                     Conf_Server[i].conn_id);
2372         }
2373 }
2374
2375 #endif
2376
2377 /**
2378  * Initialize server configuration structure to default values.
2379  *
2380  * @param Server        Pointer to server structure to initialize.
2381  */
2382 static void
2383 Init_Server_Struct( CONF_SERVER *Server )
2384 {
2385         assert( Server != NULL );
2386
2387         memset( Server, 0, sizeof (CONF_SERVER) );
2388
2389         Server->group = NONE;
2390         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2391
2392         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2393
2394         Proc_InitStruct(&Server->res_stat);
2395         Server->conn_id = NONE;
2396         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2397 }
2398
2399 /* -eof- */