src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * Configuration management (reading, parsing & validation)
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <errno.h>
  22 #ifdef PROTOTYPES
  23 #       include <stdarg.h>
  24 #else
  25 #       include <varargs.h>
  26 #endif
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <strings.h>
  31 #include <unistd.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36
  37 #ifdef HAVE_CTYPE_H
  38 # include <ctype.h>
  39 #endif
  40
  41 #include "array.h"
  42 #include "ngircd.h"
  43 #include "conn.h"
  44 #include "channel.h"
  45 #include "defines.h"
  46 #include "log.h"
  47 #include "match.h"
  48 #include "tool.h"
  49
  50 #include "exp.h"
  51 #include "conf.h"
  52
  53
  54 static bool Use_Log = true, Using_MotdFile = true;
  55 static CONF_SERVER New_Server;
  56 static int New_Server_Idx;
  57
  58 static char Conf_MotdFile[FNAME_LEN];
  59
  60 static void Set_Defaults PARAMS(( bool InitServers ));
  61 static bool Read_Config PARAMS(( bool ngircd_starting ));
  62 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
  63
  64 static void Handle_GLOBAL PARAMS(( int Line, char *Var, char *Arg ));
  65 static void Handle_LIMITS PARAMS(( int Line, char *Var, char *Arg ));
  66 static void Handle_OPTIONS PARAMS(( int Line, char *Var, char *Arg ));
  67 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
  68 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
  69 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
  70
  71 static void Config_Error PARAMS(( const int Level, const char *Format, ... ));
  72
  73 static void Config_Error_NaN PARAMS(( const int LINE, const char *Value ));
  74 static void Config_Error_Section PARAMS(( const int Line, const char *Item,
  75                                           const char *Section ));
  76 static void Config_Error_TooLong PARAMS(( const int LINE, const char *Value ));
  77
  78 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  79
  80
  81 #ifdef WANT_IPV6
  82 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  83 #else
  84 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  85 #endif
  86
  87
  88 #ifdef SSL_SUPPORT
  89
  90 static void Handle_SSL PARAMS(( int Line, char *Var, char *Ark ));
  91
  92 struct SSLOptions Conf_SSLOptions;
  93
  94 /**
  95  * Initialize SSL configuration.
  96  */
  97 static void
  98 ConfSSL_Init(void)
  99 {
 100         free(Conf_SSLOptions.KeyFile);
 101         Conf_SSLOptions.KeyFile = NULL;
 102
 103         free(Conf_SSLOptions.CertFile);
 104         Conf_SSLOptions.CertFile = NULL;
 105
 106         free(Conf_SSLOptions.DHFile);
 107         Conf_SSLOptions.DHFile = NULL;
 108         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 109 }
 110
 111 /**
 112  * Make sure that a configured file is readable.
 113  *
 114  * Currently, this function is only used for SSL-related options ...
 115  *
 116  * @param Var Configuration variable
 117  * @param Filename Configured filename
 118  */
 119 static void
 120 CheckFileReadable(const char *Var, const char *Filename)
 121 {
 122         FILE *fp;
 123
 124         if (!Filename)
 125                 return;
 126
 127         fp = fopen(Filename, "r");
 128         if (fp)
 129                 fclose(fp);
 130         else
 131                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
 132                              Filename, Var, strerror(errno));
 133 }
 134
 135 #endif
 136
 137
 138 /**
 139  * Duplicate string and warn on errors.
 140  *
 141  * @returns Pointer to string on success, NULL otherwise.
 142  */
 143 static char *
 144 strdup_warn(const char *str)
 145 {
 146         char *ptr = strdup(str);
 147         if (!ptr)
 148                 Config_Error(LOG_ERR,
 149                              "Could not allocate memory for string: %s", str);
 150         return ptr;
 151 }
 152
 153 /**
 154  * Output a comma separated list of ports (integer values).
 155  */
 156 static void
 157 ports_puts(array *a)
 158 {
 159         size_t len;
 160         UINT16 *ports;
 161         len = array_length(a, sizeof(UINT16));
 162         if (len--) {
 163                 ports = (UINT16*) array_start(a);
 164                 printf("%u", (unsigned int) *ports);
 165                 while (len--) {
 166                         ports++;
 167                         printf(", %u", (unsigned int) *ports);
 168                 }
 169         }
 170         putc('\n', stdout);
 171 }
 172
 173 /**
 174  * Parse a comma separated string into an array of port numbers (integers).
 175  */
 176 static void
 177 ports_parse(array *a, int Line, char *Arg)
 178 {
 179         char *ptr;
 180         int port;
 181         UINT16 port16;
 182
 183         array_trunc(a);
 184
 185         ptr = strtok( Arg, "," );
 186         while (ptr) {
 187                 ngt_TrimStr(ptr);
 188                 port = atoi(ptr);
 189                 if (port > 0 && port < 0xFFFF) {
 190                         port16 = (UINT16) port;
 191                         if (!array_catb(a, (char*)&port16, sizeof port16))
 192                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 193                                                         NGIRCd_ConfFile, Line, port, strerror(errno));
 194                 } else {
 195                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 196                                                                         NGIRCd_ConfFile, Line, port );
 197                 }
 198
 199                 ptr = strtok( NULL, "," );
 200         }
 201 }
 202
 203 /**
 204  * Initialize configuration module.
 205  */
 206 GLOBAL void
 207 Conf_Init( void )
 208 {
 209         Read_Config( true );
 210         Validate_Config(false, false);
 211 }
 212
 213 /**
 214  * "Rehash" (reload) server configuration.
 215  *
 216  * @returns true if configuration has been re-read, false on errors.
 217  */
 218 GLOBAL bool
 219 Conf_Rehash( void )
 220 {
 221         if (!Read_Config(false))
 222                 return false;
 223         Validate_Config(false, true);
 224
 225         /* Update CLIENT structure of local server */
 226         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 227         return true;
 228 }
 229
 230 /**
 231  * Output a boolean value as "yes/no" string.
 232  */
 233 static const char*
 234 yesno_to_str(int boolean_value)
 235 {
 236         if (boolean_value)
 237                 return "yes";
 238         return "no";
 239 }
 240
 241 /**
 242  * Free all IRC operator configuration structures.
 243  */
 244 static void
 245 opers_free(void)
 246 {
 247         struct Conf_Oper *op;
 248         size_t len;
 249
 250         len = array_length(&Conf_Opers, sizeof(*op));
 251         op = array_start(&Conf_Opers);
 252         while (len--) {
 253                 free(op->mask);
 254                 op++;
 255         }
 256         array_free(&Conf_Opers);
 257 }
 258
 259 /**
 260  * Output all IRC operator configuration structures.
 261  */
 262 static void
 263 opers_puts(void)
 264 {
 265         struct Conf_Oper *op;
 266         size_t count, i;
 267
 268         count = array_length(&Conf_Opers, sizeof(*op));
 269         op = array_start(&Conf_Opers);
 270         for (i = 0; i < count; i++, op++) {
 271                 if (!op->name[0])
 272                         continue;
 273
 274                 puts("[OPERATOR]");
 275                 printf("  Name = %s\n", op->name);
 276                 printf("  Password = %s\n", op->pwd);
 277                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 278         }
 279 }
 280
 281 /**
 282  * Read configuration, validate and output it.
 283  *
 284  * This function waits for a keypress of the user when stdin/stdout are valid
 285  * tty's ("you can read our nice message and we can read in your keypress").
 286  *
 287  * @return      0 on succes, 1 on failure(s); therefore the result code can
 288  *              directly be used by exit() when running "ngircd --configtest".
 289  */
 290 GLOBAL int
 291 Conf_Test( void )
 292 {
 293         struct passwd *pwd;
 294         struct group *grp;
 295         unsigned int i;
 296         bool config_valid;
 297         size_t predef_channel_count;
 298         struct Conf_Channel *predef_chan;
 299
 300         Use_Log = false;
 301
 302         if (! Read_Config(true))
 303                 return 1;
 304
 305         config_valid = Validate_Config(true, false);
 306
 307         /* Valid tty? */
 308         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
 309                 puts("OK, press enter to see a dump of your server configuration ...");
 310                 getchar();
 311         } else
 312                 puts("Ok, dump of your server configuration follows:\n");
 313
 314         puts("[GLOBAL]");
 315         printf("  Name = %s\n", Conf_ServerName);
 316         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 317         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 318         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 319         printf("  Info = %s\n", Conf_ServerInfo);
 320         printf("  Listen = %s\n", Conf_ListenAddress);
 321         if (Using_MotdFile) {
 322                 printf("  MotdFile = %s\n", Conf_MotdFile);
 323                 printf("  MotdPhrase =\n");
 324         } else {
 325                 printf("  MotdFile = \n");
 326                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 327                        ? (const char*) array_start(&Conf_Motd) : "");
 328         }
 329 #ifndef PAM
 330         printf("  Password = %s\n", Conf_ServerPwd);
 331 #endif
 332         printf("  PidFile = %s\n", Conf_PidFile);
 333         printf("  Ports = ");
 334         ports_puts(&Conf_ListenPorts);
 335         grp = getgrgid(Conf_GID);
 336         if (grp)
 337                 printf("  ServerGID = %s\n", grp->gr_name);
 338         else
 339                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 340         pwd = getpwuid(Conf_UID);
 341         if (pwd)
 342                 printf("  ServerUID = %s\n", pwd->pw_name);
 343         else
 344                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 345         puts("");
 346
 347         puts("[LIMITS]");
 348         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 349         printf("  MaxConnections = %ld\n", Conf_MaxConnections);
 350         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
 351         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
 352         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
 353         printf("  PingTimeout = %d\n", Conf_PingTimeout);
 354         printf("  PongTimeout = %d\n", Conf_PongTimeout);
 355         puts("");
 356
 357         puts("[OPTIONS]");
 358         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 359         printf("  ChrootDir = %s\n", Conf_Chroot);
 360         printf("  CloakHost = %s\n", Conf_CloakHost);
 361         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
 362 #ifdef WANT_IPV6
 363         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 364         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
 365 #endif
 366         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 367 #ifdef IDENT
 368         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 369 #endif
 370         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
 371         printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
 372         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
 373         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 374 #ifdef PAM
 375         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
 376         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
 377 #endif
 378         printf("  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
 379 #ifndef STRICT_RFC
 380         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
 381 #endif
 382         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
 383 #ifdef SYSLOG
 384         printf("  SyslogFacility = %s\n",
 385                ngt_SyslogFacilityName(Conf_SyslogFacility));
 386 #endif
 387         printf("  WebircPassword = %s\n", Conf_WebircPwd);
 388         puts("");
 389
 390 #ifdef SSL_SUPPORT
 391         puts("[SSL]");
 392         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
 393                                         ? Conf_SSLOptions.CertFile : "");
 394         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
 395                                         ? Conf_SSLOptions.DHFile : "");
 396         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
 397                                         ? Conf_SSLOptions.KeyFile : "");
 398         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
 399                 puts("  KeyFilePassword = <secret>");
 400         else
 401                 puts("  KeyFilePassword = ");
 402         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 403         printf("  Ports = ");
 404         ports_puts(&Conf_SSLOptions.ListenPorts);
 405         puts("");
 406 #endif
 407
 408         opers_puts();
 409
 410         for( i = 0; i < MAX_SERVERS; i++ ) {
 411                 if( ! Conf_Server[i].name[0] ) continue;
 412
 413                 /* Valid "Server" section */
 414                 puts( "[SERVER]" );
 415                 printf( "  Name = %s\n", Conf_Server[i].name );
 416                 printf( "  Host = %s\n", Conf_Server[i].host );
 417                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
 418 #ifdef SSL_SUPPORT
 419                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
 420 #endif
 421                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
 422                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
 423                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
 424                 printf( "  Group = %d\n", Conf_Server[i].group );
 425                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
 426         }
 427
 428         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
 429         predef_chan = array_start(&Conf_Channels);
 430
 431         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
 432                 if (!predef_chan->name[0])
 433                         continue;
 434
 435                 /* Valid "Channel" section */
 436                 puts( "[CHANNEL]" );
 437                 printf("  Name = %s\n", predef_chan->name);
 438                 printf("  Modes = %s\n", predef_chan->modes);
 439                 printf("  Key = %s\n", predef_chan->key);
 440                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
 441                 printf("  Topic = %s\n", predef_chan->topic);
 442                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
 443         }
 444
 445         return (config_valid ? 0 : 1);
 446 }
 447
 448 /**
 449  * Remove connection information from configured server.
 450  *
 451  * If the server is set as "once", delete it from our configuration;
 452  * otherwise set the time for the next connection attempt.
 453  *
 454  * Non-server connections will be silently ignored.
 455  */
 456 GLOBAL void
 457 Conf_UnsetServer( CONN_ID Idx )
 458 {
 459         int i;
 460         time_t t;
 461
 462         /* Check all our configured servers */
 463         for( i = 0; i < MAX_SERVERS; i++ ) {
 464                 if( Conf_Server[i].conn_id != Idx ) continue;
 465
 466                 /* Gotcha! Mark server configuration as "unused": */
 467                 Conf_Server[i].conn_id = NONE;
 468
 469                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 470                         /* Delete configuration here */
 471                         Init_Server_Struct( &Conf_Server[i] );
 472                 } else {
 473                         /* Set time for next connect attempt */
 474                         t = time(NULL);
 475                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
 476                                 /* The connection has been "long", so we don't
 477                                  * require the next attempt to be delayed. */
 478                                 Conf_Server[i].lasttry =
 479                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
 480                         } else
 481                                 Conf_Server[i].lasttry = t;
 482                 }
 483         }
 484 }
 485
 486 /**
 487  * Set connection information for specified configured server.
 488  */
 489 GLOBAL void
 490 Conf_SetServer( int ConfServer, CONN_ID Idx )
 491 {
 492         assert( ConfServer > NONE );
 493         assert( Idx > NONE );
 494
 495         Conf_Server[ConfServer].conn_id = Idx;
 496 }
 497
 498 /**
 499  * Get index of server in configuration structure.
 500  */
 501 GLOBAL int
 502 Conf_GetServer( CONN_ID Idx )
 503 {
 504         int i = 0;
 505
 506         assert( Idx > NONE );
 507
 508         for( i = 0; i < MAX_SERVERS; i++ ) {
 509                 if( Conf_Server[i].conn_id == Idx ) return i;
 510         }
 511         return NONE;
 512 }
 513
 514 /**
 515  * Enable a server by name and adjust its port number.
 516  *
 517  * @returns     true if a server has been enabled and now has a valid port
 518  *              number and host name for outgoing connections.
 519  */
 520 GLOBAL bool
 521 Conf_EnableServer( const char *Name, UINT16 Port )
 522 {
 523         int i;
 524
 525         assert( Name != NULL );
 526         for( i = 0; i < MAX_SERVERS; i++ ) {
 527                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 528                         /* Gotcha! Set port and enable server: */
 529                         Conf_Server[i].port = Port;
 530                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 531                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 532                 }
 533         }
 534         return false;
 535 }
 536
 537 /**
 538  * Enable a server by name.
 539  *
 540  * The server is only usable as outgoing server, if it has set a valid port
 541  * number for outgoing connections!
 542  * If not, you have to use Conf_EnableServer() function to make it available.
 543  *
 544  * @returns     true if a server has been enabled; false otherwise.
 545  */
 546 GLOBAL bool
 547 Conf_EnablePassiveServer(const char *Name)
 548 {
 549         int i;
 550
 551         assert( Name != NULL );
 552         for (i = 0; i < MAX_SERVERS; i++) {
 553                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
 554                     && (Conf_Server[i].port > 0)) {
 555                         /* BINGO! Enable server */
 556                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 557                         return true;
 558                 }
 559         }
 560         return false;
 561 }
 562
 563 /**
 564  * Disable a server by name.
 565  * An already established connection will be disconnected.
 566  *
 567  * @returns     true if a server was found and has been disabled.
 568  */
 569 GLOBAL bool
 570 Conf_DisableServer( const char *Name )
 571 {
 572         int i;
 573
 574         assert( Name != NULL );
 575         for( i = 0; i < MAX_SERVERS; i++ ) {
 576                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 577                         /* Gotcha! Disable and disconnect server: */
 578                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 579                         if( Conf_Server[i].conn_id > NONE )
 580                                 Conn_Close(Conf_Server[i].conn_id, NULL,
 581                                            "Server link terminated on operator request",
 582                                            true);
 583                         return true;
 584                 }
 585         }
 586         return false;
 587 }
 588
 589 /**
 590  * Add a new remote server to our configuration.
 591  *
 592  * @param Name          Name of the new server.
 593  * @param Port          Port number to connect to or 0 for incoming connections.
 594  * @param Host          Host name to connect to.
 595  * @param MyPwd         Password that will be sent to the peer.
 596  * @param PeerPwd       Password that must be received from the peer.
 597  * @returns             true if the new server has been added; false otherwise.
 598  */
 599 GLOBAL bool
 600 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
 601                const char *MyPwd, const char *PeerPwd)
 602 {
 603         int i;
 604
 605         assert( Name != NULL );
 606         assert( Host != NULL );
 607         assert( MyPwd != NULL );
 608         assert( PeerPwd != NULL );
 609
 610         /* Search unused item in server configuration structure */
 611         for( i = 0; i < MAX_SERVERS; i++ ) {
 612                 /* Is this item used? */
 613                 if( ! Conf_Server[i].name[0] ) break;
 614         }
 615         if( i >= MAX_SERVERS ) return false;
 616
 617         Init_Server_Struct( &Conf_Server[i] );
 618         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 619         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 620         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 621         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 622         Conf_Server[i].port = Port;
 623         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 624
 625         return true;
 626 }
 627
 628 /**
 629  * Check if the given nick name is an service.
 630  *
 631  * @returns true if the given nick name belongs to an "IRC service".
 632  */
 633 GLOBAL bool
 634 Conf_IsService(int ConfServer, const char *Nick)
 635 {
 636         return MatchCaseInsensitive(Conf_Server[ConfServer].svs_mask, Nick);
 637 }
 638
 639 /**
 640  * Initialize configuration settings with their default values.
 641  */
 642 static void
 643 Set_Defaults(bool InitServers)
 644 {
 645         int i;
 646
 647         /* Global */
 648         strcpy(Conf_ServerName, "");
 649         strcpy(Conf_ServerAdmin1, "");
 650         strcpy(Conf_ServerAdmin2, "");
 651         strcpy(Conf_ServerAdminMail, "");
 652         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 653                  PACKAGE_NAME, PACKAGE_VERSION);
 654         free(Conf_ListenAddress);
 655         Conf_ListenAddress = NULL;
 656         array_free(&Conf_Motd);
 657         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 658         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 659         strcpy(Conf_ServerPwd, "");
 660         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 661         Conf_UID = Conf_GID = 0;
 662
 663         /* Limits */
 664         Conf_ConnectRetry = 60;
 665         Conf_MaxConnections = 0;
 666         Conf_MaxConnectionsIP = 5;
 667         Conf_MaxJoins = 10;
 668         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 669         Conf_PingTimeout = 120;
 670         Conf_PongTimeout = 20;
 671
 672         /* Options */
 673         Conf_AllowRemoteOper = false;
 674 #ifndef STRICT_RFC
 675         Conf_AuthPing = false;
 676 #endif
 677         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 678         strcpy(Conf_CloakHost, "");
 679         Conf_CloakUserToNick = false;
 680         Conf_ConnectIPv4 = true;
 681 #ifdef WANT_IPV6
 682         Conf_ConnectIPv6 = true;
 683 #else
 684         Conf_ConnectIPv6 = false;
 685 #endif
 686         Conf_DNS = true;
 687 #ifdef IDENTAUTH
 688         Conf_Ident = true;
 689 #else
 690         Conf_Ident = false;
 691 #endif
 692         Conf_MorePrivacy = false;
 693         Conf_NoticeAuth = false;
 694         Conf_OperCanMode = false;
 695         Conf_OperServerMode = false;
 696 #ifdef PAM
 697         Conf_PAM = true;
 698 #else
 699         Conf_PAM = false;
 700 #endif
 701         Conf_PAMIsOptional = false;
 702         Conf_PredefChannelsOnly = false;
 703 #ifdef SYSLOG
 704         Conf_ScrubCTCP = false;
 705 #ifdef LOG_LOCAL5
 706         Conf_SyslogFacility = LOG_LOCAL5;
 707 #else
 708         Conf_SyslogFacility = 0;
 709 #endif
 710 #endif
 711
 712         /* Initialize server configuration structures */
 713         if (InitServers) {
 714                 for (i = 0; i < MAX_SERVERS;
 715                      Init_Server_Struct(&Conf_Server[i++]));
 716         }
 717 }
 718
 719 /**
 720  * Get number of configured listening ports.
 721  *
 722  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
 723  */
 724 static bool
 725 no_listenports(void)
 726 {
 727         size_t cnt = array_bytes(&Conf_ListenPorts);
 728 #ifdef SSL_SUPPORT
 729         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 730 #endif
 731         return cnt == 0;
 732 }
 733
 734 /**
 735  * Read MOTD ("message of the day") file.
 736  *
 737  * @param filename      Name of the file to read.
 738  */
 739 static void
 740 Read_Motd(const char *filename)
 741 {
 742         char line[127];
 743         FILE *fp;
 744
 745         if (*filename == '\0')
 746                 return;
 747
 748         fp = fopen(filename, "r");
 749         if (!fp) {
 750                 Config_Error(LOG_WARNING, "Can't read MOTD file \"%s\": %s",
 751                                         filename, strerror(errno));
 752                 return;
 753         }
 754
 755         array_free(&Conf_Motd);
 756         Using_MotdFile = true;
 757
 758         while (fgets(line, (int)sizeof line, fp)) {
 759                 ngt_TrimLastChr( line, '\n');
 760
 761                 /* add text including \0 */
 762                 if (!array_catb(&Conf_Motd, line, strlen(line) + 1)) {
 763                         Log(LOG_WARNING, "Cannot add MOTD text: %s", strerror(errno));
 764                         break;
 765                 }
 766         }
 767         fclose(fp);
 768 }
 769
 770 /**
 771  * Read ngIRCd configuration file.
 772  *
 773  * Please note that this function uses exit(1) on fatal errors and therefore
 774  * can result in ngIRCd terminating!
 775  *
 776  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
 777  * @returns                     true when the configuration file has been read
 778  *                              successfully; false otherwise.
 779  */
 780 static bool
 781 Read_Config( bool ngircd_starting )
 782 {
 783         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
 784         const UINT16 defaultport = 6667;
 785         int line, i, n;
 786         size_t count;
 787         FILE *fd;
 788
 789         /* Open configuration file */
 790         fd = fopen( NGIRCd_ConfFile, "r" );
 791         if( ! fd ) {
 792                 /* No configuration file found! */
 793                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 794                                         NGIRCd_ConfFile, strerror( errno ));
 795                 if (!ngircd_starting)
 796                         return false;
 797                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 798                 exit( 1 );
 799         }
 800
 801         opers_free();
 802         Set_Defaults( ngircd_starting );
 803
 804         Config_Error( LOG_INFO, "Reading configuration from \"%s\" ...", NGIRCd_ConfFile );
 805
 806         /* Clean up server configuration structure: mark all already
 807          * configured servers as "once" so that they are deleted
 808          * after the next disconnect and delete all unused servers.
 809          * And delete all servers which are "duplicates" of servers
 810          * that are already marked as "once" (such servers have been
 811          * created by the last rehash but are now useless). */
 812         for( i = 0; i < MAX_SERVERS; i++ ) {
 813                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 814                 else {
 815                         /* This structure is in use ... */
 816                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 817                                 /* Check for duplicates */
 818                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 819                                         if( n == i ) continue;
 820
 821                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 822                                                 Init_Server_Struct( &Conf_Server[n] );
 823 #ifdef DEBUG
 824                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
 825                                                                                                 n, i );
 826 #endif
 827                                         }
 828                                 }
 829                         } else {
 830                                 /* Mark server as "once" */
 831                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 832                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
 833                         }
 834                 }
 835         }
 836
 837         /* Initialize variables */
 838         line = 0;
 839         strcpy( section, "" );
 840         Init_Server_Struct( &New_Server );
 841         New_Server_Idx = NONE;
 842 #ifdef SSL_SUPPORT
 843         ConfSSL_Init();
 844 #endif
 845         /* Read configuration file */
 846         while( true ) {
 847                 if( ! fgets( str, LINE_LEN, fd )) break;
 848                 ngt_TrimStr( str );
 849                 line++;
 850
 851                 /* Skip comments and empty lines */
 852                 if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
 853
 854                 /* Is this the beginning of a new section? */
 855                 if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' )) {
 856                         strlcpy( section, str, sizeof( section ));
 857                         if (strcasecmp(section, "[GLOBAL]") == 0 ||
 858                             strcasecmp(section, "[LIMITS]") == 0 ||
 859                             strcasecmp(section, "[OPTIONS]") == 0 ||
 860                             strcasecmp(section, "[SSL]") == 0)
 861                                 continue;
 862
 863                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
 864                                 /* Check if there is already a server to add */
 865                                 if( New_Server.name[0] ) {
 866                                         /* Copy data to "real" server structure */
 867                                         assert( New_Server_Idx > NONE );
 868                                         Conf_Server[New_Server_Idx] = New_Server;
 869                                 }
 870
 871                                 /* Re-init structure for new server */
 872                                 Init_Server_Struct( &New_Server );
 873
 874                                 /* Search unused item in server configuration structure */
 875                                 for( i = 0; i < MAX_SERVERS; i++ ) {
 876                                         /* Is this item used? */
 877                                         if( ! Conf_Server[i].name[0] ) break;
 878                                 }
 879                                 if( i >= MAX_SERVERS ) {
 880                                         /* Oops, no free item found! */
 881                                         Config_Error( LOG_ERR, "Too many servers configured." );
 882                                         New_Server_Idx = NONE;
 883                                 }
 884                                 else New_Server_Idx = i;
 885                                 continue;
 886                         }
 887
 888                         if (strcasecmp(section, "[CHANNEL]") == 0) {
 889                                 count = array_length(&Conf_Channels,
 890                                                      sizeof(struct Conf_Channel));
 891                                 if (!array_alloc(&Conf_Channels,
 892                                                  sizeof(struct Conf_Channel),
 893                                                  count)) {
 894                                         Config_Error(LOG_ERR,
 895                                                      "Could not allocate memory for new operator (line %d)",
 896                                                      line);
 897                                 }
 898                                 continue;
 899                         }
 900
 901                         if (strcasecmp(section, "[OPERATOR]") == 0) {
 902                                 count = array_length(&Conf_Opers,
 903                                                      sizeof(struct Conf_Oper));
 904                                 if (!array_alloc(&Conf_Opers,
 905                                                  sizeof(struct Conf_Oper),
 906                                                  count)) {
 907                                         Config_Error(LOG_ERR,
 908                                                      "Could not allocate memory for new channel (line &d)",
 909                                                      line);
 910                                 }
 911                                 continue;
 912                         }
 913
 914                         Config_Error(LOG_ERR,
 915                                      "%s, line %d: Unknown section \"%s\"!",
 916                                      NGIRCd_ConfFile, line, section);
 917                         section[0] = 0x1;
 918                 }
 919                 if( section[0] == 0x1 ) continue;
 920
 921                 /* Split line into variable name and parameters */
 922                 ptr = strchr( str, '=' );
 923                 if( ! ptr ) {
 924                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
 925                         continue;
 926                 }
 927                 *ptr = '\0';
 928                 var = str; ngt_TrimStr( var );
 929                 arg = ptr + 1; ngt_TrimStr( arg );
 930
 931                 if(strcasecmp(section, "[GLOBAL]") == 0)
 932                         Handle_GLOBAL(line, var, arg);
 933                 else if(strcasecmp(section, "[LIMITS]") == 0)
 934                         Handle_LIMITS(line, var, arg);
 935                 else if(strcasecmp(section, "[OPTIONS]") == 0)
 936                         Handle_OPTIONS(line, var, arg);
 937 #ifdef SSL_SUPPORT
 938                 else if(strcasecmp(section, "[SSL]") == 0)
 939                         Handle_SSL(line, var, arg);
 940 #endif
 941                 else if(strcasecmp(section, "[OPERATOR]") == 0)
 942                         Handle_OPERATOR(line, var, arg);
 943                 else if(strcasecmp(section, "[SERVER]") == 0)
 944                         Handle_SERVER(line, var, arg);
 945                 else if(strcasecmp(section, "[CHANNEL]") == 0)
 946                         Handle_CHANNEL(line, var, arg);
 947                 else
 948                         Config_Error(LOG_ERR,
 949                                      "%s, line %d: Variable \"%s\" outside section!",
 950                                      NGIRCd_ConfFile, line, var);
 951         }
 952
 953         /* Close configuration file */
 954         fclose( fd );
 955
 956         /* Check if there is still a server to add */
 957         if( New_Server.name[0] ) {
 958                 /* Copy data to "real" server structure */
 959                 assert( New_Server_Idx > NONE );
 960                 Conf_Server[New_Server_Idx] = New_Server;
 961         }
 962
 963         /* not a single listening port? Add default. */
 964         if (no_listenports() &&
 965                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
 966         {
 967                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
 968                                         (unsigned int) defaultport, strerror(errno));
 969
 970                 exit(1);
 971         }
 972
 973         if (!Conf_ListenAddress)
 974                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
 975
 976         if (!Conf_ListenAddress) {
 977                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
 978                 exit(1);
 979         }
 980
 981         /* No MOTD phrase configured? (re)try motd file. */
 982         if (array_bytes(&Conf_Motd) == 0)
 983                 Read_Motd(Conf_MotdFile);
 984
 985 #ifdef SSL_SUPPORT
 986         /* Make sure that all SSL-related files are readable */
 987         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
 988         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
 989         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
 990 #endif
 991
 992         return true;
 993 }
 994
 995 /**
 996  * Check whether a string argument is "true" or "false".
 997  *
 998  * @param Arg   Input string.
 999  * @returns     true if the input string has been parsed as "yes", "true"
1000  *              (case insensitive) or a non-zero integer value.
1001  */
1002 static bool
1003 Check_ArgIsTrue(const char *Arg)
1004 {
1005         if (strcasecmp(Arg, "yes") == 0)
1006                 return true;
1007         if (strcasecmp(Arg, "true") == 0)
1008                 return true;
1009         if (atoi(Arg) != 0)
1010                 return true;
1011
1012         return false;
1013 }
1014
1015 /**
1016  * Handle setting of "MaxNickLength".
1017  *
1018  * @param Line  Line number in configuration file.
1019  * @raram Arg   Input string.
1020  * @returns     New configured maximum nick name length.
1021  */
1022 static unsigned int
1023 Handle_MaxNickLength(int Line, const char *Arg)
1024 {
1025         unsigned new;
1026
1027         new = (unsigned) atoi(Arg) + 1;
1028         if (new > CLIENT_NICK_LEN) {
1029                 Config_Error(LOG_WARNING,
1030                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1031                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
1032                 return CLIENT_NICK_LEN;
1033         }
1034         if (new < 2) {
1035                 Config_Error(LOG_WARNING,
1036                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1037                              NGIRCd_ConfFile, Line);
1038                 return 2;
1039         }
1040         return new;
1041 }
1042
1043 /**
1044  * Output a warning messages if IDENT is configured but not compiled in.
1045  */
1046 static void
1047 WarnIdent(int UNUSED Line)
1048 {
1049 #ifndef IDENTAUTH
1050         if (Conf_Ident) {
1051                 /* user has enabled ident lookups explicitly, but ... */
1052                 Config_Error(LOG_WARNING,
1053                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1054                         NGIRCd_ConfFile, Line);
1055         }
1056 #endif
1057 }
1058
1059 /**
1060  * Output a warning messages if IPv6 is configured but not compiled in.
1061  */
1062 static void
1063 WarnIPv6(int UNUSED Line)
1064 {
1065 #ifndef WANT_IPV6
1066         if (Conf_ConnectIPv6) {
1067                 /* user has enabled IPv6 explicitly, but ... */
1068                 Config_Error(LOG_WARNING,
1069                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1070                         NGIRCd_ConfFile, Line);
1071         }
1072 #endif
1073 }
1074
1075 /**
1076  * Output a warning messages if PAM is configured but not compiled in.
1077  */
1078 static void
1079 WarnPAM(int UNUSED Line)
1080 {
1081 #ifndef PAM
1082         if (Conf_PAM) {
1083                 Config_Error(LOG_WARNING,
1084                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1085                         NGIRCd_ConfFile, Line);
1086         }
1087 #endif
1088 }
1089
1090 /**
1091  * Handle legacy "NoXXX" options in [GLOBAL] section.
1092  *
1093  * TODO: This function and support for "NoXXX" could be removed starting
1094  * with ngIRCd release 19 (one release after marking it "deprecated").
1095  *
1096  * @param Var   Variable name.
1097  * @param Arg   Argument string.
1098  * @returns     true if a NoXXX option has been processed; false otherwise.
1099  */
1100 static bool
1101 CheckLegacyNoOption(const char *Var, const char *Arg)
1102 {
1103         if(strcasecmp(Var, "NoDNS") == 0) {
1104                 Conf_DNS = !Check_ArgIsTrue( Arg );
1105                 return true;
1106         }
1107         if (strcasecmp(Var, "NoIdent") == 0) {
1108                 Conf_Ident = !Check_ArgIsTrue(Arg);
1109                 return true;
1110         }
1111         if(strcasecmp(Var, "NoPAM") == 0) {
1112                 Conf_PAM = !Check_ArgIsTrue(Arg);
1113                 return true;
1114         }
1115         return false;
1116 }
1117
1118 /**
1119  * Handle deprecated legacy options in [GLOBAL] section.
1120  *
1121  * TODO: This function and support for these options in the [Global] section
1122  * could be removed starting with ngIRCd release 19 (one release after
1123  * marking it "deprecated").
1124  *
1125  * @param Var   Variable name.
1126  * @param Arg   Argument string.
1127  * @returns     true if a legacy option has been processed; false otherwise.
1128  */
1129 static const char*
1130 CheckLegacyGlobalOption(int Line, char *Var, char *Arg)
1131 {
1132         if (strcasecmp(Var, "AllowRemoteOper") == 0
1133             || strcasecmp(Var, "ChrootDir") == 0
1134             || strcasecmp(Var, "ConnectIPv4") == 0
1135             || strcasecmp(Var, "ConnectIPv6") == 0
1136             || strcasecmp(Var, "OperCanUseMode") == 0
1137             || strcasecmp(Var, "OperServerMode") == 0
1138             || strcasecmp(Var, "PredefChannelsOnly") == 0
1139             || strcasecmp(Var, "SyslogFacility") == 0
1140             || strcasecmp(Var, "WebircPassword") == 0) {
1141                 Handle_OPTIONS(Line, Var, Arg);
1142                 return "[Options]";
1143         }
1144         if (strcasecmp(Var, "ConnectRetry") == 0
1145             || strcasecmp(Var, "MaxConnections") == 0
1146             || strcasecmp(Var, "MaxConnectionsIP") == 0
1147             || strcasecmp(Var, "MaxJoins") == 0
1148             || strcasecmp(Var, "MaxNickLength") == 0
1149             || strcasecmp(Var, "PingTimeout") == 0
1150             || strcasecmp(Var, "PongTimeout") == 0) {
1151                 Handle_LIMITS(Line, Var, Arg);
1152                 return "[Limits]";
1153         }
1154 #ifdef SSL_SUPPORT
1155         if (strcasecmp(Var, "SSLCertFile") == 0
1156             || strcasecmp(Var, "SSLDHFile") == 0
1157             || strcasecmp(Var, "SSLKeyFile") == 0
1158             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1159             || strcasecmp(Var, "SSLPorts") == 0) {
1160                 Handle_SSL(Line, Var + 3, Arg);
1161                 return "[SSL]";
1162         }
1163 #endif
1164
1165         return NULL;
1166 }
1167
1168 /**
1169  * Strip "no" prefix of a string.
1170  *
1171  * TODO: This function and support for "NoXXX" should be removed starting
1172  * with ngIRCd release 19! (One release after marking it "deprecated").
1173  *
1174  * @param str   Pointer to input string starting with "no".
1175  * @returns     New pointer to string without "no" prefix.
1176  */
1177 static const char *
1178 NoNo(const char *str)
1179 {
1180         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1181         return str + 2;
1182 }
1183
1184 /**
1185  * Invert "boolean" string.
1186  *
1187  * TODO: This function and support for "NoXXX" should be removed starting
1188  * with ngIRCd release 19! (One release after marking it "deprecated").
1189  *
1190  * @param arg   "Boolean" input string.
1191  * @returns     Pointer to inverted "boolean string".
1192  */
1193 static const char *
1194 InvertArg(const char *arg)
1195 {
1196         return yesno_to_str(!Check_ArgIsTrue(arg));
1197 }
1198
1199 /**
1200  * Handle variable in [Global] configuration section.
1201  *
1202  * @param Line  Line numer in configuration file.
1203  * @param Var   Variable name.
1204  * @param Arg   Variable argument.
1205  */
1206 static void
1207 Handle_GLOBAL( int Line, char *Var, char *Arg )
1208 {
1209         struct passwd *pwd;
1210         struct group *grp;
1211         size_t len;
1212         const char *section;
1213
1214         assert(Line > 0);
1215         assert(Var != NULL);
1216         assert(Arg != NULL);
1217
1218         if (strcasecmp(Var, "Name") == 0) {
1219                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1220                 if (len >= sizeof(Conf_ServerName))
1221                         Config_Error_TooLong(Line, Var);
1222                 return;
1223         }
1224         if (strcasecmp(Var, "AdminInfo1") == 0) {
1225                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1226                 if (len >= sizeof(Conf_ServerAdmin1))
1227                         Config_Error_TooLong(Line, Var);
1228                 return;
1229         }
1230         if (strcasecmp(Var, "AdminInfo2") == 0) {
1231                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1232                 if (len >= sizeof(Conf_ServerAdmin2))
1233                         Config_Error_TooLong(Line, Var);
1234                 return;
1235         }
1236         if (strcasecmp(Var, "AdminEMail") == 0) {
1237                 len = strlcpy(Conf_ServerAdminMail, Arg,
1238                         sizeof(Conf_ServerAdminMail));
1239                 if (len >= sizeof(Conf_ServerAdminMail))
1240                         Config_Error_TooLong(Line, Var);
1241                 return;
1242         }
1243         if (strcasecmp(Var, "Info") == 0) {
1244                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1245                 if (len >= sizeof(Conf_ServerInfo))
1246                         Config_Error_TooLong(Line, Var);
1247                 return;
1248         }
1249         if (strcasecmp(Var, "Listen") == 0) {
1250                 if (Conf_ListenAddress) {
1251                         Config_Error(LOG_ERR,
1252                                      "Multiple Listen= options, ignoring: %s",
1253                                      Arg);
1254                         return;
1255                 }
1256                 Conf_ListenAddress = strdup_warn(Arg);
1257                 /* If allocation fails, we're in trouble: we cannot ignore the
1258                  * error -- otherwise ngircd would listen on all interfaces. */
1259                 if (!Conf_ListenAddress) {
1260                         Config_Error(LOG_ALERT,
1261                                      "%s exiting due to fatal errors!",
1262                                      PACKAGE_NAME);
1263                         exit(1);
1264                 }
1265                 return;
1266         }
1267         if (strcasecmp(Var, "MotdFile") == 0) {
1268                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1269                 if (len >= sizeof(Conf_MotdFile))
1270                         Config_Error_TooLong(Line, Var);
1271                 return;
1272         }
1273         if (strcasecmp(Var, "MotdPhrase") == 0) {
1274                 len = strlen(Arg);
1275                 if (len == 0)
1276                         return;
1277                 if (len >= LINE_LEN) {
1278                         Config_Error_TooLong(Line, Var);
1279                         return;
1280                 }
1281                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1282                         Config_Error(LOG_WARNING,
1283                                      "%s, line %d: Could not append MotdPhrase: %s",
1284                                      NGIRCd_ConfFile, Line, strerror(errno));
1285                 Using_MotdFile = false;
1286                 return;
1287         }
1288         if(strcasecmp(Var, "Password") == 0) {
1289                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1290                 if (len >= sizeof(Conf_ServerPwd))
1291                         Config_Error_TooLong(Line, Var);
1292                 return;
1293         }
1294         if (strcasecmp(Var, "PidFile") == 0) {
1295                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1296                 if (len >= sizeof(Conf_PidFile))
1297                         Config_Error_TooLong(Line, Var);
1298                 return;
1299         }
1300         if (strcasecmp(Var, "Ports") == 0) {
1301                 ports_parse(&Conf_ListenPorts, Line, Arg);
1302                 return;
1303         }
1304         if (strcasecmp(Var, "ServerGID") == 0) {
1305                 grp = getgrnam(Arg);
1306                 if (grp)
1307                         Conf_GID = grp->gr_gid;
1308                 else {
1309                         Conf_GID = (unsigned int)atoi(Arg);
1310                         if (!Conf_GID && strcmp(Arg, "0"))
1311                                 Config_Error_NaN(Line, Var);
1312                 }
1313                 return;
1314         }
1315         if (strcasecmp(Var, "ServerUID") == 0) {
1316                 pwd = getpwnam(Arg);
1317                 if (pwd)
1318                         Conf_UID = pwd->pw_uid;
1319                 else {
1320                         Conf_UID = (unsigned int)atoi(Arg);
1321                         if (!Conf_UID && strcmp(Arg, "0"))
1322                                 Config_Error_NaN(Line, Var);
1323                 }
1324                 return;
1325         }
1326
1327         if (CheckLegacyNoOption(Var, Arg)) {
1328                 /* TODO: This function and support for "NoXXX" could be
1329                  * be removed starting with ngIRCd release 19 (one release
1330                  * after marking it "deprecated"). */
1331                 Config_Error(LOG_WARNING,
1332                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1333                              NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1334                 if (strcasecmp(Var, "NoIdent") == 0)
1335                         WarnIdent(Line);
1336                 else if (strcasecmp(Var, "NoPam") == 0)
1337                         WarnPAM(Line);
1338                 return;
1339         }
1340         if ((section = CheckLegacyGlobalOption(Line, Var, Arg))) {
1341                 /** TODO: This function and support for these options in the
1342                  * [Global] section could be removed starting with ngIRCd
1343                  * release 19 (one release after marking it "deprecated"). */
1344                 if (strncasecmp(Var, "SSL", 3) == 0) {
1345                         Config_Error(LOG_WARNING,
1346                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1347                                      NGIRCd_ConfFile, Line, Var, section,
1348                                      Var + 3);
1349                 } else {
1350                         Config_Error(LOG_WARNING,
1351                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1352                                      NGIRCd_ConfFile, Line, Var, section);
1353                 }
1354                 return;
1355         }
1356
1357         Config_Error_Section(Line, Var, "Global");
1358 }
1359
1360 /**
1361  * Handle variable in [Limits] configuration section.
1362  *
1363  * @param Line  Line numer in configuration file.
1364  * @param Var   Variable name.
1365  * @param Arg   Variable argument.
1366  */
1367 static void
1368 Handle_LIMITS(int Line, char *Var, char *Arg)
1369 {
1370         assert(Line > 0);
1371         assert(Var != NULL);
1372         assert(Arg != NULL);
1373
1374         if (strcasecmp(Var, "ConnectRetry") == 0) {
1375                 Conf_ConnectRetry = atoi(Arg);
1376                 if (Conf_ConnectRetry < 5) {
1377                         Config_Error(LOG_WARNING,
1378                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1379                                      NGIRCd_ConfFile, Line);
1380                         Conf_ConnectRetry = 5;
1381                 }
1382                 return;
1383         }
1384         if (strcasecmp(Var, "MaxConnections") == 0) {
1385                 Conf_MaxConnections = atol(Arg);
1386                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1387                         Config_Error_NaN(Line, Var);
1388                 return;
1389         }
1390         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1391                 Conf_MaxConnectionsIP = atoi(Arg);
1392                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1393                         Config_Error_NaN(Line, Var);
1394                 return;
1395         }
1396         if (strcasecmp(Var, "MaxJoins") == 0) {
1397                 Conf_MaxJoins = atoi(Arg);
1398                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1399                         Config_Error_NaN(Line, Var);
1400                 return;
1401         }
1402         if (strcasecmp(Var, "MaxNickLength") == 0) {
1403                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1404                 return;
1405         }
1406         if (strcasecmp(Var, "PingTimeout") == 0) {
1407                 Conf_PingTimeout = atoi(Arg);
1408                 if (Conf_PingTimeout < 5) {
1409                         Config_Error(LOG_WARNING,
1410                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1411                                      NGIRCd_ConfFile, Line);
1412                         Conf_PingTimeout = 5;
1413                 }
1414                 return;
1415         }
1416         if (strcasecmp(Var, "PongTimeout") == 0) {
1417                 Conf_PongTimeout = atoi(Arg);
1418                 if (Conf_PongTimeout < 5) {
1419                         Config_Error(LOG_WARNING,
1420                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1421                                      NGIRCd_ConfFile, Line);
1422                         Conf_PongTimeout = 5;
1423                 }
1424                 return;
1425         }
1426
1427         Config_Error_Section(Line, Var, "Limits");
1428 }
1429
1430 /**
1431  * Handle variable in [Options] configuration section.
1432  *
1433  * @param Line  Line numer in configuration file.
1434  * @param Var   Variable name.
1435  * @param Arg   Variable argument.
1436  */
1437 static void
1438 Handle_OPTIONS(int Line, char *Var, char *Arg)
1439 {
1440         size_t len;
1441
1442         assert(Line > 0);
1443         assert(Var != NULL);
1444         assert(Arg != NULL);
1445
1446         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1447                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1448                 return;
1449         }
1450         if (strcasecmp(Var, "ChrootDir") == 0) {
1451                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1452                 if (len >= sizeof(Conf_Chroot))
1453                         Config_Error_TooLong(Line, Var);
1454                 return;
1455         }
1456         if (strcasecmp(Var, "CloakHost") == 0) {
1457                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1458                 if (len >= sizeof(Conf_CloakHost))
1459                         Config_Error_TooLong(Line, Var);
1460                 return;
1461         }
1462         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1463                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1464                 return;
1465         }
1466         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1467                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1468                 WarnIPv6(Line);
1469                 return;
1470         }
1471         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1472                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1473                 return;
1474         }
1475         if (strcasecmp(Var, "DNS") == 0) {
1476                 Conf_DNS = Check_ArgIsTrue(Arg);
1477                 return;
1478         }
1479         if (strcasecmp(Var, "Ident") == 0) {
1480                 Conf_Ident = Check_ArgIsTrue(Arg);
1481                 WarnIdent(Line);
1482                 return;
1483         }
1484         if (strcasecmp(Var, "MorePrivacy") == 0) {
1485                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1486                 return;
1487         }
1488         if (strcasecmp(Var, "NoticeAuth") == 0) {
1489                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1490                 return;
1491         }
1492         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1493                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1494                 return;
1495         }
1496         if (strcasecmp(Var, "OperServerMode") == 0) {
1497                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1498                 return;
1499         }
1500         if (strcasecmp(Var, "PAM") == 0) {
1501                 Conf_PAM = Check_ArgIsTrue(Arg);
1502                 WarnPAM(Line);
1503                 return;
1504         }
1505         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1506                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1507                 return;
1508         }
1509         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1510                 Conf_PredefChannelsOnly = Check_ArgIsTrue(Arg);
1511                 return;
1512         }
1513 #ifndef STRICT_RFC
1514         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1515                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1516                 return;
1517         }
1518 #endif
1519         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1520                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1521                 return;
1522         }
1523 #ifdef SYSLOG
1524         if (strcasecmp(Var, "SyslogFacility") == 0) {
1525                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1526                                                            Conf_SyslogFacility);
1527                 return;
1528         }
1529 #endif
1530         if (strcasecmp(Var, "WebircPassword") == 0) {
1531                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1532                 if (len >= sizeof(Conf_WebircPwd))
1533                         Config_Error_TooLong(Line, Var);
1534                 return;
1535         }
1536
1537         Config_Error_Section(Line, Var, "Options");
1538 }
1539
1540 #ifdef SSL_SUPPORT
1541
1542 /**
1543  * Handle variable in [SSL] configuration section.
1544  *
1545  * @param Line  Line numer in configuration file.
1546  * @param Var   Variable name.
1547  * @param Arg   Variable argument.
1548  */
1549 static void
1550 Handle_SSL(int Line, char *Var, char *Arg)
1551 {
1552         assert(Line > 0);
1553         assert(Var != NULL);
1554         assert(Arg != NULL);
1555
1556         if (strcasecmp(Var, "CertFile") == 0) {
1557                 assert(Conf_SSLOptions.CertFile == NULL);
1558                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1559                 return;
1560         }
1561         if (strcasecmp(Var, "DHFile") == 0) {
1562                 assert(Conf_SSLOptions.DHFile == NULL);
1563                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1564                 return;
1565         }
1566         if (strcasecmp(Var, "KeyFile") == 0) {
1567                 assert(Conf_SSLOptions.KeyFile == NULL);
1568                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1569                 return;
1570         }
1571         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1572                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1573                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1574                         Config_Error(LOG_ERR,
1575                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1576                                      NGIRCd_ConfFile, Line, Var,
1577                                      strerror(errno));
1578                 return;
1579         }
1580         if (strcasecmp(Var, "Ports") == 0) {
1581                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1582                 return;
1583         }
1584
1585         Config_Error_Section(Line, Var, "SSL");
1586 }
1587
1588 #endif
1589
1590 /**
1591  * Handle variable in [Operator] configuration section.
1592  *
1593  * @param Line  Line numer in configuration file.
1594  * @param Var   Variable name.
1595  * @param Arg   Variable argument.
1596  */
1597 static void
1598 Handle_OPERATOR( int Line, char *Var, char *Arg )
1599 {
1600         size_t len;
1601         struct Conf_Oper *op;
1602
1603         assert( Line > 0 );
1604         assert( Var != NULL );
1605         assert( Arg != NULL );
1606
1607         op = array_get(&Conf_Opers, sizeof(*op),
1608                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1609         if (!op)
1610                 return;
1611
1612         if (strcasecmp(Var, "Name") == 0) {
1613                 /* Name of IRC operator */
1614                 len = strlcpy(op->name, Arg, sizeof(op->name));
1615                 if (len >= sizeof(op->name))
1616                                 Config_Error_TooLong(Line, Var);
1617                 return;
1618         }
1619         if (strcasecmp(Var, "Password") == 0) {
1620                 /* Password of IRC operator */
1621                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1622                 if (len >= sizeof(op->pwd))
1623                                 Config_Error_TooLong(Line, Var);
1624                 return;
1625         }
1626         if (strcasecmp(Var, "Mask") == 0) {
1627                 if (op->mask)
1628                         return; /* Hostname already configured */
1629                 op->mask = strdup_warn( Arg );
1630                 return;
1631         }
1632
1633         Config_Error_Section(Line, Var, "Operator");
1634 }
1635
1636 /**
1637  * Handle variable in [Server] configuration section.
1638  *
1639  * @param Line  Line numer in configuration file.
1640  * @param Var   Variable name.
1641  * @param Arg   Variable argument.
1642  */
1643 static void
1644 Handle_SERVER( int Line, char *Var, char *Arg )
1645 {
1646         long port;
1647         size_t len;
1648
1649         assert( Line > 0 );
1650         assert( Var != NULL );
1651         assert( Arg != NULL );
1652
1653         /* Ignore server block if no space is left in server configuration structure */
1654         if( New_Server_Idx <= NONE ) return;
1655
1656         if( strcasecmp( Var, "Host" ) == 0 ) {
1657                 /* Hostname of the server */
1658                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1659                 if (len >= sizeof( New_Server.host ))
1660                         Config_Error_TooLong ( Line, Var );
1661                 return;
1662         }
1663         if( strcasecmp( Var, "Name" ) == 0 ) {
1664                 /* Name of the server ("Nick"/"ID") */
1665                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1666                 if (len >= sizeof( New_Server.name ))
1667                         Config_Error_TooLong( Line, Var );
1668                 return;
1669         }
1670         if (strcasecmp(Var, "Bind") == 0) {
1671                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1672                         return;
1673
1674                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1675                                 NGIRCd_ConfFile, Line, Arg);
1676                 return;
1677         }
1678         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1679                 /* Password of this server which is sent to the peer */
1680                 if (*Arg == ':') {
1681                         Config_Error(LOG_ERR,
1682                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1683                                                                                 NGIRCd_ConfFile, Line);
1684                 }
1685                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1686                 if (len >= sizeof( New_Server.pwd_in ))
1687                         Config_Error_TooLong( Line, Var );
1688                 return;
1689         }
1690         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1691                 /* Passwort of the peer which must be received */
1692                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1693                 if (len >= sizeof( New_Server.pwd_out ))
1694                         Config_Error_TooLong( Line, Var );
1695                 return;
1696         }
1697         if( strcasecmp( Var, "Port" ) == 0 ) {
1698                 /* Port to which this server should connect */
1699                 port = atol( Arg );
1700                 if (port >= 0 && port < 0xFFFF)
1701                         New_Server.port = (UINT16)port;
1702                 else
1703                         Config_Error(LOG_ERR,
1704                                 "%s, line %d (section \"Server\"): Illegal port number %ld!",
1705                                 NGIRCd_ConfFile, Line, port );
1706                 return;
1707         }
1708 #ifdef SSL_SUPPORT
1709         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1710                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1711                 return;
1712         }
1713 #endif
1714         if( strcasecmp( Var, "Group" ) == 0 ) {
1715                 /* Server group */
1716                 New_Server.group = atoi( Arg );
1717                 if (!New_Server.group && strcmp(Arg, "0"))
1718                         Config_Error_NaN(Line, Var);
1719                 return;
1720         }
1721         if( strcasecmp( Var, "Passive" ) == 0 ) {
1722                 if (Check_ArgIsTrue(Arg))
1723                         New_Server.flags |= CONF_SFLAG_DISABLED;
1724                 return;
1725         }
1726         if (strcasecmp(Var, "ServiceMask") == 0) {
1727                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1728                               sizeof(New_Server.svs_mask));
1729                 if (len >= sizeof(New_Server.svs_mask))
1730                         Config_Error_TooLong(Line, Var);
1731                 return;
1732         }
1733
1734         Config_Error_Section(Line, Var, "Server");
1735 }
1736
1737 /**
1738  * Copy channel name into channel structure.
1739  *
1740  * If the channel name is not valid because of a missing prefix ('#', '&'),
1741  * a default prefix of '#' will be added.
1742  *
1743  * @param new_chan      New already allocated channel structure.
1744  * @param name          Name of the new channel.
1745  * @returns             true on success, false otherwise.
1746  */
1747 static bool
1748 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1749 {
1750         size_t size = sizeof(new_chan->name);
1751         char *dest = new_chan->name;
1752
1753         if (!Channel_IsValidName(name)) {
1754                 /*
1755                  * maybe user forgot to add a '#'.
1756                  * This is only here for user convenience.
1757                  */
1758                 *dest = '#';
1759                 --size;
1760                 ++dest;
1761         }
1762         return size > strlcpy(dest, name, size);
1763 }
1764
1765 /**
1766  * Handle variable in [Channel] configuration section.
1767  *
1768  * @param Line  Line numer in configuration file.
1769  * @param Var   Variable name.
1770  * @param Arg   Variable argument.
1771  */
1772 static void
1773 Handle_CHANNEL(int Line, char *Var, char *Arg)
1774 {
1775         size_t len;
1776         struct Conf_Channel *chan;
1777
1778         assert( Line > 0 );
1779         assert( Var != NULL );
1780         assert( Arg != NULL );
1781
1782         chan = array_get(&Conf_Channels, sizeof(*chan),
1783                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1784         if (!chan)
1785                 return;
1786
1787         if (strcasecmp(Var, "Name") == 0) {
1788                 if (!Handle_Channelname(chan, Arg))
1789                         Config_Error_TooLong(Line, Var);
1790                 return;
1791         }
1792         if (strcasecmp(Var, "Modes") == 0) {
1793                 /* Initial modes */
1794                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1795                 if (len >= sizeof(chan->modes))
1796                         Config_Error_TooLong( Line, Var );
1797                 return;
1798         }
1799         if( strcasecmp( Var, "Topic" ) == 0 ) {
1800                 /* Initial topic */
1801                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1802                 if (len >= sizeof(chan->topic))
1803                         Config_Error_TooLong( Line, Var );
1804                 return;
1805         }
1806         if( strcasecmp( Var, "Key" ) == 0 ) {
1807                 /* Initial Channel Key (mode k) */
1808                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1809                 if (len >= sizeof(chan->key))
1810                         Config_Error_TooLong(Line, Var);
1811                 return;
1812         }
1813         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1814                 /* maximum user limit, mode l */
1815                 chan->maxusers = (unsigned long) atol(Arg);
1816                 if (!chan->maxusers && strcmp(Arg, "0"))
1817                         Config_Error_NaN(Line, Var);
1818                 return;
1819         }
1820         if (strcasecmp(Var, "KeyFile") == 0) {
1821                 /* channel keys */
1822                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1823                 if (len >= sizeof(chan->keyfile))
1824                         Config_Error_TooLong(Line, Var);
1825                 return;
1826         }
1827
1828         Config_Error_Section(Line, Var, "Channel");
1829 }
1830
1831 /**
1832  * Validate server configuration.
1833  *
1834  * Please note that this function uses exit(1) on fatal errors and therefore
1835  * can result in ngIRCd terminating!
1836  *
1837  * @param Configtest    true if the daemon has been called with "--configtest".
1838  * @param Rehash        true if re-reading configuration on runtime.
1839  * @returns             true if configuration is valid.
1840  */
1841 static bool
1842 Validate_Config(bool Configtest, bool Rehash)
1843 {
1844         /* Validate configuration settings. */
1845
1846 #ifdef DEBUG
1847         int i, servers, servers_once;
1848 #endif
1849         bool config_valid = true;
1850         char *ptr;
1851
1852         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1853         ptr = Conf_ServerName;
1854         do {
1855                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1856                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1857                 if (*ptr >= '0' && *ptr <= '9') continue;
1858                 if (ptr > Conf_ServerName) {
1859                         if (*ptr == '.' || *ptr == '-')
1860                                 continue;
1861                 }
1862                 Conf_ServerName[0] = '\0';
1863                 break;
1864         } while (*(++ptr));
1865
1866         if (!Conf_ServerName[0]) {
1867                 /* No server name configured! */
1868                 config_valid = false;
1869                 Config_Error(LOG_ALERT,
1870                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1871                              NGIRCd_ConfFile);
1872                 if (!Configtest && !Rehash) {
1873                         Config_Error(LOG_ALERT,
1874                                      "%s exiting due to fatal errors!",
1875                                      PACKAGE_NAME);
1876                         exit(1);
1877                 }
1878         }
1879
1880         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1881                 /* No dot in server name! */
1882                 config_valid = false;
1883                 Config_Error(LOG_ALERT,
1884                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1885                              NGIRCd_ConfFile);
1886                 if (!Configtest) {
1887                         Config_Error(LOG_ALERT,
1888                                      "%s exiting due to fatal errors!",
1889                                      PACKAGE_NAME);
1890                         exit(1);
1891                 }
1892         }
1893
1894 #ifdef STRICT_RFC
1895         if (!Conf_ServerAdminMail[0]) {
1896                 /* No administrative contact configured! */
1897                 config_valid = false;
1898                 Config_Error(LOG_ALERT,
1899                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1900                              NGIRCd_ConfFile);
1901                 if (!Configtest) {
1902                         Config_Error(LOG_ALERT,
1903                                      "%s exiting due to fatal errors!",
1904                                      PACKAGE_NAME);
1905                         exit(1);
1906                 }
1907         }
1908 #endif
1909
1910         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1911             && !Conf_ServerAdminMail[0]) {
1912                 /* No administrative information configured! */
1913                 Config_Error(LOG_WARNING,
1914                              "No administrative information configured but required by RFC!");
1915         }
1916
1917 #ifdef PAM
1918         if (Conf_ServerPwd[0])
1919                 Config_Error(LOG_ERR,
1920                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
1921 #endif
1922
1923 #ifdef DEBUG
1924         servers = servers_once = 0;
1925         for (i = 0; i < MAX_SERVERS; i++) {
1926                 if (Conf_Server[i].name[0]) {
1927                         servers++;
1928                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1929                                 servers_once++;
1930                 }
1931         }
1932         Log(LOG_DEBUG,
1933             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
1934             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
1935             servers, servers_once,
1936             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
1937 #endif
1938
1939         return config_valid;
1940 }
1941
1942 /**
1943  * Output "line too long" warning.
1944  *
1945  * @param Line  Line number in configuration file.
1946  * @param Item  Affected variable name.
1947  */
1948 static void
1949 Config_Error_TooLong ( const int Line, const char *Item )
1950 {
1951         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
1952 }
1953
1954 /**
1955  * Output "unknown variable" warning.
1956  *
1957  * @param Line          Line number in configuration file.
1958  * @param Item          Affected variable name.
1959  * @param Section       Section name.
1960  */
1961 static void
1962 Config_Error_Section(const int Line, const char *Item, const char *Section)
1963 {
1964         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
1965                      NGIRCd_ConfFile, Line, Section, Item);
1966 }
1967
1968 /**
1969  * Output "not a number" warning.
1970  *
1971  * @param Line  Line number in configuration file.
1972  * @param Item  Affected variable name.
1973  */
1974 static void
1975 Config_Error_NaN( const int Line, const char *Item )
1976 {
1977         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
1978                                                 NGIRCd_ConfFile, Line, Item );
1979 }
1980
1981 /**
1982  * Output configuration error to console and/or logfile.
1983  *
1984  * On runtime, the normal log functions of the daemon are used. But when
1985  * testing the configuration ("--configtest"), all messages go directly
1986  * to the console.
1987  *
1988  * @param Level         Severity level of the message.
1989  * @param Format        Format string; see printf() function.
1990  */
1991 #ifdef PROTOTYPES
1992 static void Config_Error( const int Level, const char *Format, ... )
1993 #else
1994 static void Config_Error( Level, Format, va_alist )
1995 const int Level;
1996 const char *Format;
1997 va_dcl
1998 #endif
1999 {
2000         char msg[MAX_LOG_MSG_LEN];
2001         va_list ap;
2002
2003         assert( Format != NULL );
2004
2005 #ifdef PROTOTYPES
2006         va_start( ap, Format );
2007 #else
2008         va_start( ap );
2009 #endif
2010         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2011         va_end( ap );
2012
2013         if (!Use_Log) {
2014                 if (Level <= LOG_WARNING)
2015                         printf(" - %s\n", msg);
2016                 else
2017                         puts(msg);
2018         } else
2019                 Log(Level, "%s", msg);
2020 }
2021
2022 #ifdef DEBUG
2023
2024 /**
2025  * Dump internal state of the "configuration module".
2026  */
2027 GLOBAL void
2028 Conf_DebugDump(void)
2029 {
2030         int i;
2031
2032         Log(LOG_DEBUG, "Configured servers:");
2033         for (i = 0; i < MAX_SERVERS; i++) {
2034                 if (! Conf_Server[i].name[0])
2035                         continue;
2036                 Log(LOG_DEBUG,
2037                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2038                     Conf_Server[i].name, Conf_Server[i].host,
2039                     Conf_Server[i].port, Conf_Server[i].lasttry,
2040                     Conf_Server[i].group, Conf_Server[i].flags,
2041                     Conf_Server[i].conn_id);
2042         }
2043 }
2044
2045 #endif
2046
2047 /**
2048  * Initialize server configuration structur to default values.
2049  *
2050  * @param Server        Pointer to server structure to initialize.
2051  */
2052 static void
2053 Init_Server_Struct( CONF_SERVER *Server )
2054 {
2055         assert( Server != NULL );
2056
2057         memset( Server, 0, sizeof (CONF_SERVER) );
2058
2059         Server->group = NONE;
2060         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2061
2062         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2063
2064         Proc_InitStruct(&Server->res_stat);
2065         Server->conn_id = NONE;
2066         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2067 }
2068
2069 /* -eof- */