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 #ifdef SSL_SUPPORT
 861                             || strcasecmp(section, "[SSL]") == 0
 862 #endif
 863                             )
 864                                 continue;
 865
 866                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
 867                                 /* Check if there is already a server to add */
 868                                 if( New_Server.name[0] ) {
 869                                         /* Copy data to "real" server structure */
 870                                         assert( New_Server_Idx > NONE );
 871                                         Conf_Server[New_Server_Idx] = New_Server;
 872                                 }
 873
 874                                 /* Re-init structure for new server */
 875                                 Init_Server_Struct( &New_Server );
 876
 877                                 /* Search unused item in server configuration structure */
 878                                 for( i = 0; i < MAX_SERVERS; i++ ) {
 879                                         /* Is this item used? */
 880                                         if( ! Conf_Server[i].name[0] ) break;
 881                                 }
 882                                 if( i >= MAX_SERVERS ) {
 883                                         /* Oops, no free item found! */
 884                                         Config_Error( LOG_ERR, "Too many servers configured." );
 885                                         New_Server_Idx = NONE;
 886                                 }
 887                                 else New_Server_Idx = i;
 888                                 continue;
 889                         }
 890
 891                         if (strcasecmp(section, "[CHANNEL]") == 0) {
 892                                 count = array_length(&Conf_Channels,
 893                                                      sizeof(struct Conf_Channel));
 894                                 if (!array_alloc(&Conf_Channels,
 895                                                  sizeof(struct Conf_Channel),
 896                                                  count)) {
 897                                         Config_Error(LOG_ERR,
 898                                                      "Could not allocate memory for new operator (line %d)",
 899                                                      line);
 900                                 }
 901                                 continue;
 902                         }
 903
 904                         if (strcasecmp(section, "[OPERATOR]") == 0) {
 905                                 count = array_length(&Conf_Opers,
 906                                                      sizeof(struct Conf_Oper));
 907                                 if (!array_alloc(&Conf_Opers,
 908                                                  sizeof(struct Conf_Oper),
 909                                                  count)) {
 910                                         Config_Error(LOG_ERR,
 911                                                      "Could not allocate memory for new channel (line &d)",
 912                                                      line);
 913                                 }
 914                                 continue;
 915                         }
 916
 917                         Config_Error(LOG_ERR,
 918                                      "%s, line %d: Unknown section \"%s\"!",
 919                                      NGIRCd_ConfFile, line, section);
 920                         section[0] = 0x1;
 921                 }
 922                 if( section[0] == 0x1 ) continue;
 923
 924                 /* Split line into variable name and parameters */
 925                 ptr = strchr( str, '=' );
 926                 if( ! ptr ) {
 927                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
 928                         continue;
 929                 }
 930                 *ptr = '\0';
 931                 var = str; ngt_TrimStr( var );
 932                 arg = ptr + 1; ngt_TrimStr( arg );
 933
 934                 if(strcasecmp(section, "[GLOBAL]") == 0)
 935                         Handle_GLOBAL(line, var, arg);
 936                 else if(strcasecmp(section, "[LIMITS]") == 0)
 937                         Handle_LIMITS(line, var, arg);
 938                 else if(strcasecmp(section, "[OPTIONS]") == 0)
 939                         Handle_OPTIONS(line, var, arg);
 940 #ifdef SSL_SUPPORT
 941                 else if(strcasecmp(section, "[SSL]") == 0)
 942                         Handle_SSL(line, var, arg);
 943 #endif
 944                 else if(strcasecmp(section, "[OPERATOR]") == 0)
 945                         Handle_OPERATOR(line, var, arg);
 946                 else if(strcasecmp(section, "[SERVER]") == 0)
 947                         Handle_SERVER(line, var, arg);
 948                 else if(strcasecmp(section, "[CHANNEL]") == 0)
 949                         Handle_CHANNEL(line, var, arg);
 950                 else
 951                         Config_Error(LOG_ERR,
 952                                      "%s, line %d: Variable \"%s\" outside section!",
 953                                      NGIRCd_ConfFile, line, var);
 954         }
 955
 956         /* Close configuration file */
 957         fclose( fd );
 958
 959         /* Check if there is still a server to add */
 960         if( New_Server.name[0] ) {
 961                 /* Copy data to "real" server structure */
 962                 assert( New_Server_Idx > NONE );
 963                 Conf_Server[New_Server_Idx] = New_Server;
 964         }
 965
 966         /* not a single listening port? Add default. */
 967         if (no_listenports() &&
 968                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
 969         {
 970                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
 971                                         (unsigned int) defaultport, strerror(errno));
 972
 973                 exit(1);
 974         }
 975
 976         if (!Conf_ListenAddress)
 977                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
 978
 979         if (!Conf_ListenAddress) {
 980                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
 981                 exit(1);
 982         }
 983
 984         /* No MOTD phrase configured? (re)try motd file. */
 985         if (array_bytes(&Conf_Motd) == 0)
 986                 Read_Motd(Conf_MotdFile);
 987
 988 #ifdef SSL_SUPPORT
 989         /* Make sure that all SSL-related files are readable */
 990         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
 991         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
 992         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
 993 #endif
 994
 995         return true;
 996 }
 997
 998 /**
 999  * Check whether a string argument is "true" or "false".
1000  *
1001  * @param Arg   Input string.
1002  * @returns     true if the input string has been parsed as "yes", "true"
1003  *              (case insensitive) or a non-zero integer value.
1004  */
1005 static bool
1006 Check_ArgIsTrue(const char *Arg)
1007 {
1008         if (strcasecmp(Arg, "yes") == 0)
1009                 return true;
1010         if (strcasecmp(Arg, "true") == 0)
1011                 return true;
1012         if (atoi(Arg) != 0)
1013                 return true;
1014
1015         return false;
1016 }
1017
1018 /**
1019  * Handle setting of "MaxNickLength".
1020  *
1021  * @param Line  Line number in configuration file.
1022  * @raram Arg   Input string.
1023  * @returns     New configured maximum nick name length.
1024  */
1025 static unsigned int
1026 Handle_MaxNickLength(int Line, const char *Arg)
1027 {
1028         unsigned new;
1029
1030         new = (unsigned) atoi(Arg) + 1;
1031         if (new > CLIENT_NICK_LEN) {
1032                 Config_Error(LOG_WARNING,
1033                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1034                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
1035                 return CLIENT_NICK_LEN;
1036         }
1037         if (new < 2) {
1038                 Config_Error(LOG_WARNING,
1039                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1040                              NGIRCd_ConfFile, Line);
1041                 return 2;
1042         }
1043         return new;
1044 }
1045
1046 /**
1047  * Output a warning messages if IDENT is configured but not compiled in.
1048  */
1049 static void
1050 WarnIdent(int UNUSED Line)
1051 {
1052 #ifndef IDENTAUTH
1053         if (Conf_Ident) {
1054                 /* user has enabled ident lookups explicitly, but ... */
1055                 Config_Error(LOG_WARNING,
1056                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1057                         NGIRCd_ConfFile, Line);
1058         }
1059 #endif
1060 }
1061
1062 /**
1063  * Output a warning messages if IPv6 is configured but not compiled in.
1064  */
1065 static void
1066 WarnIPv6(int UNUSED Line)
1067 {
1068 #ifndef WANT_IPV6
1069         if (Conf_ConnectIPv6) {
1070                 /* user has enabled IPv6 explicitly, but ... */
1071                 Config_Error(LOG_WARNING,
1072                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1073                         NGIRCd_ConfFile, Line);
1074         }
1075 #endif
1076 }
1077
1078 /**
1079  * Output a warning messages if PAM is configured but not compiled in.
1080  */
1081 static void
1082 WarnPAM(int UNUSED Line)
1083 {
1084 #ifndef PAM
1085         if (Conf_PAM) {
1086                 Config_Error(LOG_WARNING,
1087                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1088                         NGIRCd_ConfFile, Line);
1089         }
1090 #endif
1091 }
1092
1093 /**
1094  * Handle legacy "NoXXX" options in [GLOBAL] section.
1095  *
1096  * TODO: This function and support for "NoXXX" could be removed starting
1097  * with ngIRCd release 19 (one release after marking it "deprecated").
1098  *
1099  * @param Var   Variable name.
1100  * @param Arg   Argument string.
1101  * @returns     true if a NoXXX option has been processed; false otherwise.
1102  */
1103 static bool
1104 CheckLegacyNoOption(const char *Var, const char *Arg)
1105 {
1106         if(strcasecmp(Var, "NoDNS") == 0) {
1107                 Conf_DNS = !Check_ArgIsTrue( Arg );
1108                 return true;
1109         }
1110         if (strcasecmp(Var, "NoIdent") == 0) {
1111                 Conf_Ident = !Check_ArgIsTrue(Arg);
1112                 return true;
1113         }
1114         if(strcasecmp(Var, "NoPAM") == 0) {
1115                 Conf_PAM = !Check_ArgIsTrue(Arg);
1116                 return true;
1117         }
1118         return false;
1119 }
1120
1121 /**
1122  * Handle deprecated legacy options in [GLOBAL] section.
1123  *
1124  * TODO: This function and support for these options in the [Global] section
1125  * could be removed starting with ngIRCd release 19 (one release after
1126  * marking it "deprecated").
1127  *
1128  * @param Var   Variable name.
1129  * @param Arg   Argument string.
1130  * @returns     true if a legacy option has been processed; false otherwise.
1131  */
1132 static const char*
1133 CheckLegacyGlobalOption(int Line, char *Var, char *Arg)
1134 {
1135         if (strcasecmp(Var, "AllowRemoteOper") == 0
1136             || strcasecmp(Var, "ChrootDir") == 0
1137             || strcasecmp(Var, "ConnectIPv4") == 0
1138             || strcasecmp(Var, "ConnectIPv6") == 0
1139             || strcasecmp(Var, "OperCanUseMode") == 0
1140             || strcasecmp(Var, "OperServerMode") == 0
1141             || strcasecmp(Var, "PredefChannelsOnly") == 0
1142             || strcasecmp(Var, "SyslogFacility") == 0
1143             || strcasecmp(Var, "WebircPassword") == 0) {
1144                 Handle_OPTIONS(Line, Var, Arg);
1145                 return "[Options]";
1146         }
1147         if (strcasecmp(Var, "ConnectRetry") == 0
1148             || strcasecmp(Var, "MaxConnections") == 0
1149             || strcasecmp(Var, "MaxConnectionsIP") == 0
1150             || strcasecmp(Var, "MaxJoins") == 0
1151             || strcasecmp(Var, "MaxNickLength") == 0
1152             || strcasecmp(Var, "PingTimeout") == 0
1153             || strcasecmp(Var, "PongTimeout") == 0) {
1154                 Handle_LIMITS(Line, Var, Arg);
1155                 return "[Limits]";
1156         }
1157 #ifdef SSL_SUPPORT
1158         if (strcasecmp(Var, "SSLCertFile") == 0
1159             || strcasecmp(Var, "SSLDHFile") == 0
1160             || strcasecmp(Var, "SSLKeyFile") == 0
1161             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1162             || strcasecmp(Var, "SSLPorts") == 0) {
1163                 Handle_SSL(Line, Var + 3, Arg);
1164                 return "[SSL]";
1165         }
1166 #endif
1167
1168         return NULL;
1169 }
1170
1171 /**
1172  * Strip "no" prefix of a string.
1173  *
1174  * TODO: This function and support for "NoXXX" should be removed starting
1175  * with ngIRCd release 19! (One release after marking it "deprecated").
1176  *
1177  * @param str   Pointer to input string starting with "no".
1178  * @returns     New pointer to string without "no" prefix.
1179  */
1180 static const char *
1181 NoNo(const char *str)
1182 {
1183         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1184         return str + 2;
1185 }
1186
1187 /**
1188  * Invert "boolean" string.
1189  *
1190  * TODO: This function and support for "NoXXX" should be removed starting
1191  * with ngIRCd release 19! (One release after marking it "deprecated").
1192  *
1193  * @param arg   "Boolean" input string.
1194  * @returns     Pointer to inverted "boolean string".
1195  */
1196 static const char *
1197 InvertArg(const char *arg)
1198 {
1199         return yesno_to_str(!Check_ArgIsTrue(arg));
1200 }
1201
1202 /**
1203  * Handle variable in [Global] configuration section.
1204  *
1205  * @param Line  Line numer in configuration file.
1206  * @param Var   Variable name.
1207  * @param Arg   Variable argument.
1208  */
1209 static void
1210 Handle_GLOBAL( int Line, char *Var, char *Arg )
1211 {
1212         struct passwd *pwd;
1213         struct group *grp;
1214         size_t len;
1215         const char *section;
1216
1217         assert(Line > 0);
1218         assert(Var != NULL);
1219         assert(Arg != NULL);
1220
1221         if (strcasecmp(Var, "Name") == 0) {
1222                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1223                 if (len >= sizeof(Conf_ServerName))
1224                         Config_Error_TooLong(Line, Var);
1225                 return;
1226         }
1227         if (strcasecmp(Var, "AdminInfo1") == 0) {
1228                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1229                 if (len >= sizeof(Conf_ServerAdmin1))
1230                         Config_Error_TooLong(Line, Var);
1231                 return;
1232         }
1233         if (strcasecmp(Var, "AdminInfo2") == 0) {
1234                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1235                 if (len >= sizeof(Conf_ServerAdmin2))
1236                         Config_Error_TooLong(Line, Var);
1237                 return;
1238         }
1239         if (strcasecmp(Var, "AdminEMail") == 0) {
1240                 len = strlcpy(Conf_ServerAdminMail, Arg,
1241                         sizeof(Conf_ServerAdminMail));
1242                 if (len >= sizeof(Conf_ServerAdminMail))
1243                         Config_Error_TooLong(Line, Var);
1244                 return;
1245         }
1246         if (strcasecmp(Var, "Info") == 0) {
1247                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1248                 if (len >= sizeof(Conf_ServerInfo))
1249                         Config_Error_TooLong(Line, Var);
1250                 return;
1251         }
1252         if (strcasecmp(Var, "Listen") == 0) {
1253                 if (Conf_ListenAddress) {
1254                         Config_Error(LOG_ERR,
1255                                      "Multiple Listen= options, ignoring: %s",
1256                                      Arg);
1257                         return;
1258                 }
1259                 Conf_ListenAddress = strdup_warn(Arg);
1260                 /* If allocation fails, we're in trouble: we cannot ignore the
1261                  * error -- otherwise ngircd would listen on all interfaces. */
1262                 if (!Conf_ListenAddress) {
1263                         Config_Error(LOG_ALERT,
1264                                      "%s exiting due to fatal errors!",
1265                                      PACKAGE_NAME);
1266                         exit(1);
1267                 }
1268                 return;
1269         }
1270         if (strcasecmp(Var, "MotdFile") == 0) {
1271                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1272                 if (len >= sizeof(Conf_MotdFile))
1273                         Config_Error_TooLong(Line, Var);
1274                 return;
1275         }
1276         if (strcasecmp(Var, "MotdPhrase") == 0) {
1277                 len = strlen(Arg);
1278                 if (len == 0)
1279                         return;
1280                 if (len >= LINE_LEN) {
1281                         Config_Error_TooLong(Line, Var);
1282                         return;
1283                 }
1284                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1285                         Config_Error(LOG_WARNING,
1286                                      "%s, line %d: Could not append MotdPhrase: %s",
1287                                      NGIRCd_ConfFile, Line, strerror(errno));
1288                 Using_MotdFile = false;
1289                 return;
1290         }
1291         if(strcasecmp(Var, "Password") == 0) {
1292                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1293                 if (len >= sizeof(Conf_ServerPwd))
1294                         Config_Error_TooLong(Line, Var);
1295                 return;
1296         }
1297         if (strcasecmp(Var, "PidFile") == 0) {
1298                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1299                 if (len >= sizeof(Conf_PidFile))
1300                         Config_Error_TooLong(Line, Var);
1301                 return;
1302         }
1303         if (strcasecmp(Var, "Ports") == 0) {
1304                 ports_parse(&Conf_ListenPorts, Line, Arg);
1305                 return;
1306         }
1307         if (strcasecmp(Var, "ServerGID") == 0) {
1308                 grp = getgrnam(Arg);
1309                 if (grp)
1310                         Conf_GID = grp->gr_gid;
1311                 else {
1312                         Conf_GID = (unsigned int)atoi(Arg);
1313                         if (!Conf_GID && strcmp(Arg, "0"))
1314                                 Config_Error(LOG_WARNING,
1315                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1316                                              NGIRCd_ConfFile, Line, Var);
1317                 }
1318                 return;
1319         }
1320         if (strcasecmp(Var, "ServerUID") == 0) {
1321                 pwd = getpwnam(Arg);
1322                 if (pwd)
1323                         Conf_UID = pwd->pw_uid;
1324                 else {
1325                         Conf_UID = (unsigned int)atoi(Arg);
1326                         if (!Conf_UID && strcmp(Arg, "0"))
1327                                 Config_Error(LOG_WARNING,
1328                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1329                                              NGIRCd_ConfFile, Line, Var);
1330                 }
1331                 return;
1332         }
1333
1334         if (CheckLegacyNoOption(Var, Arg)) {
1335                 /* TODO: This function and support for "NoXXX" could be
1336                  * be removed starting with ngIRCd release 19 (one release
1337                  * after marking it "deprecated"). */
1338                 Config_Error(LOG_WARNING,
1339                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1340                              NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1341                 if (strcasecmp(Var, "NoIdent") == 0)
1342                         WarnIdent(Line);
1343                 else if (strcasecmp(Var, "NoPam") == 0)
1344                         WarnPAM(Line);
1345                 return;
1346         }
1347         if ((section = CheckLegacyGlobalOption(Line, Var, Arg))) {
1348                 /** TODO: This function and support for these options in the
1349                  * [Global] section could be removed starting with ngIRCd
1350                  * release 19 (one release after marking it "deprecated"). */
1351                 if (strncasecmp(Var, "SSL", 3) == 0) {
1352                         Config_Error(LOG_WARNING,
1353                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1354                                      NGIRCd_ConfFile, Line, Var, section,
1355                                      Var + 3);
1356                 } else {
1357                         Config_Error(LOG_WARNING,
1358                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1359                                      NGIRCd_ConfFile, Line, Var, section);
1360                 }
1361                 return;
1362         }
1363
1364         Config_Error_Section(Line, Var, "Global");
1365 }
1366
1367 /**
1368  * Handle variable in [Limits] configuration section.
1369  *
1370  * @param Line  Line numer in configuration file.
1371  * @param Var   Variable name.
1372  * @param Arg   Variable argument.
1373  */
1374 static void
1375 Handle_LIMITS(int Line, char *Var, char *Arg)
1376 {
1377         assert(Line > 0);
1378         assert(Var != NULL);
1379         assert(Arg != NULL);
1380
1381         if (strcasecmp(Var, "ConnectRetry") == 0) {
1382                 Conf_ConnectRetry = atoi(Arg);
1383                 if (Conf_ConnectRetry < 5) {
1384                         Config_Error(LOG_WARNING,
1385                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1386                                      NGIRCd_ConfFile, Line);
1387                         Conf_ConnectRetry = 5;
1388                 }
1389                 return;
1390         }
1391         if (strcasecmp(Var, "MaxConnections") == 0) {
1392                 Conf_MaxConnections = atol(Arg);
1393                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1394                         Config_Error_NaN(Line, Var);
1395                 return;
1396         }
1397         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1398                 Conf_MaxConnectionsIP = atoi(Arg);
1399                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1400                         Config_Error_NaN(Line, Var);
1401                 return;
1402         }
1403         if (strcasecmp(Var, "MaxJoins") == 0) {
1404                 Conf_MaxJoins = atoi(Arg);
1405                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1406                         Config_Error_NaN(Line, Var);
1407                 return;
1408         }
1409         if (strcasecmp(Var, "MaxNickLength") == 0) {
1410                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1411                 return;
1412         }
1413         if (strcasecmp(Var, "PingTimeout") == 0) {
1414                 Conf_PingTimeout = atoi(Arg);
1415                 if (Conf_PingTimeout < 5) {
1416                         Config_Error(LOG_WARNING,
1417                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1418                                      NGIRCd_ConfFile, Line);
1419                         Conf_PingTimeout = 5;
1420                 }
1421                 return;
1422         }
1423         if (strcasecmp(Var, "PongTimeout") == 0) {
1424                 Conf_PongTimeout = atoi(Arg);
1425                 if (Conf_PongTimeout < 5) {
1426                         Config_Error(LOG_WARNING,
1427                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1428                                      NGIRCd_ConfFile, Line);
1429                         Conf_PongTimeout = 5;
1430                 }
1431                 return;
1432         }
1433
1434         Config_Error_Section(Line, Var, "Limits");
1435 }
1436
1437 /**
1438  * Handle variable in [Options] configuration section.
1439  *
1440  * @param Line  Line numer in configuration file.
1441  * @param Var   Variable name.
1442  * @param Arg   Variable argument.
1443  */
1444 static void
1445 Handle_OPTIONS(int Line, char *Var, char *Arg)
1446 {
1447         size_t len;
1448
1449         assert(Line > 0);
1450         assert(Var != NULL);
1451         assert(Arg != NULL);
1452
1453         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1454                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1455                 return;
1456         }
1457         if (strcasecmp(Var, "ChrootDir") == 0) {
1458                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1459                 if (len >= sizeof(Conf_Chroot))
1460                         Config_Error_TooLong(Line, Var);
1461                 return;
1462         }
1463         if (strcasecmp(Var, "CloakHost") == 0) {
1464                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1465                 if (len >= sizeof(Conf_CloakHost))
1466                         Config_Error_TooLong(Line, Var);
1467                 return;
1468         }
1469         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1470                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1471                 return;
1472         }
1473         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1474                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1475                 WarnIPv6(Line);
1476                 return;
1477         }
1478         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1479                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1480                 return;
1481         }
1482         if (strcasecmp(Var, "DNS") == 0) {
1483                 Conf_DNS = Check_ArgIsTrue(Arg);
1484                 return;
1485         }
1486         if (strcasecmp(Var, "Ident") == 0) {
1487                 Conf_Ident = Check_ArgIsTrue(Arg);
1488                 WarnIdent(Line);
1489                 return;
1490         }
1491         if (strcasecmp(Var, "MorePrivacy") == 0) {
1492                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1493                 return;
1494         }
1495         if (strcasecmp(Var, "NoticeAuth") == 0) {
1496                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1497                 return;
1498         }
1499         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1500                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1501                 return;
1502         }
1503         if (strcasecmp(Var, "OperServerMode") == 0) {
1504                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1505                 return;
1506         }
1507         if (strcasecmp(Var, "PAM") == 0) {
1508                 Conf_PAM = Check_ArgIsTrue(Arg);
1509                 WarnPAM(Line);
1510                 return;
1511         }
1512         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1513                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1514                 return;
1515         }
1516         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1517                 Conf_PredefChannelsOnly = Check_ArgIsTrue(Arg);
1518                 return;
1519         }
1520 #ifndef STRICT_RFC
1521         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1522                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1523                 return;
1524         }
1525 #endif
1526         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1527                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1528                 return;
1529         }
1530 #ifdef SYSLOG
1531         if (strcasecmp(Var, "SyslogFacility") == 0) {
1532                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1533                                                            Conf_SyslogFacility);
1534                 return;
1535         }
1536 #endif
1537         if (strcasecmp(Var, "WebircPassword") == 0) {
1538                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1539                 if (len >= sizeof(Conf_WebircPwd))
1540                         Config_Error_TooLong(Line, Var);
1541                 return;
1542         }
1543
1544         Config_Error_Section(Line, Var, "Options");
1545 }
1546
1547 #ifdef SSL_SUPPORT
1548
1549 /**
1550  * Handle variable in [SSL] configuration section.
1551  *
1552  * @param Line  Line numer in configuration file.
1553  * @param Var   Variable name.
1554  * @param Arg   Variable argument.
1555  */
1556 static void
1557 Handle_SSL(int Line, char *Var, char *Arg)
1558 {
1559         assert(Line > 0);
1560         assert(Var != NULL);
1561         assert(Arg != NULL);
1562
1563         if (strcasecmp(Var, "CertFile") == 0) {
1564                 assert(Conf_SSLOptions.CertFile == NULL);
1565                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1566                 return;
1567         }
1568         if (strcasecmp(Var, "DHFile") == 0) {
1569                 assert(Conf_SSLOptions.DHFile == NULL);
1570                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1571                 return;
1572         }
1573         if (strcasecmp(Var, "KeyFile") == 0) {
1574                 assert(Conf_SSLOptions.KeyFile == NULL);
1575                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1576                 return;
1577         }
1578         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1579                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1580                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1581                         Config_Error(LOG_ERR,
1582                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1583                                      NGIRCd_ConfFile, Line, Var,
1584                                      strerror(errno));
1585                 return;
1586         }
1587         if (strcasecmp(Var, "Ports") == 0) {
1588                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1589                 return;
1590         }
1591
1592         Config_Error_Section(Line, Var, "SSL");
1593 }
1594
1595 #endif
1596
1597 /**
1598  * Handle variable in [Operator] configuration section.
1599  *
1600  * @param Line  Line numer in configuration file.
1601  * @param Var   Variable name.
1602  * @param Arg   Variable argument.
1603  */
1604 static void
1605 Handle_OPERATOR( int Line, char *Var, char *Arg )
1606 {
1607         size_t len;
1608         struct Conf_Oper *op;
1609
1610         assert( Line > 0 );
1611         assert( Var != NULL );
1612         assert( Arg != NULL );
1613
1614         op = array_get(&Conf_Opers, sizeof(*op),
1615                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1616         if (!op)
1617                 return;
1618
1619         if (strcasecmp(Var, "Name") == 0) {
1620                 /* Name of IRC operator */
1621                 len = strlcpy(op->name, Arg, sizeof(op->name));
1622                 if (len >= sizeof(op->name))
1623                                 Config_Error_TooLong(Line, Var);
1624                 return;
1625         }
1626         if (strcasecmp(Var, "Password") == 0) {
1627                 /* Password of IRC operator */
1628                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1629                 if (len >= sizeof(op->pwd))
1630                                 Config_Error_TooLong(Line, Var);
1631                 return;
1632         }
1633         if (strcasecmp(Var, "Mask") == 0) {
1634                 if (op->mask)
1635                         return; /* Hostname already configured */
1636                 op->mask = strdup_warn( Arg );
1637                 return;
1638         }
1639
1640         Config_Error_Section(Line, Var, "Operator");
1641 }
1642
1643 /**
1644  * Handle variable in [Server] configuration section.
1645  *
1646  * @param Line  Line numer in configuration file.
1647  * @param Var   Variable name.
1648  * @param Arg   Variable argument.
1649  */
1650 static void
1651 Handle_SERVER( int Line, char *Var, char *Arg )
1652 {
1653         long port;
1654         size_t len;
1655
1656         assert( Line > 0 );
1657         assert( Var != NULL );
1658         assert( Arg != NULL );
1659
1660         /* Ignore server block if no space is left in server configuration structure */
1661         if( New_Server_Idx <= NONE ) return;
1662
1663         if( strcasecmp( Var, "Host" ) == 0 ) {
1664                 /* Hostname of the server */
1665                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1666                 if (len >= sizeof( New_Server.host ))
1667                         Config_Error_TooLong ( Line, Var );
1668                 return;
1669         }
1670         if( strcasecmp( Var, "Name" ) == 0 ) {
1671                 /* Name of the server ("Nick"/"ID") */
1672                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1673                 if (len >= sizeof( New_Server.name ))
1674                         Config_Error_TooLong( Line, Var );
1675                 return;
1676         }
1677         if (strcasecmp(Var, "Bind") == 0) {
1678                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1679                         return;
1680
1681                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1682                                 NGIRCd_ConfFile, Line, Arg);
1683                 return;
1684         }
1685         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1686                 /* Password of this server which is sent to the peer */
1687                 if (*Arg == ':') {
1688                         Config_Error(LOG_ERR,
1689                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1690                                                                                 NGIRCd_ConfFile, Line);
1691                 }
1692                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1693                 if (len >= sizeof( New_Server.pwd_in ))
1694                         Config_Error_TooLong( Line, Var );
1695                 return;
1696         }
1697         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1698                 /* Passwort of the peer which must be received */
1699                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1700                 if (len >= sizeof( New_Server.pwd_out ))
1701                         Config_Error_TooLong( Line, Var );
1702                 return;
1703         }
1704         if( strcasecmp( Var, "Port" ) == 0 ) {
1705                 /* Port to which this server should connect */
1706                 port = atol( Arg );
1707                 if (port >= 0 && port < 0xFFFF)
1708                         New_Server.port = (UINT16)port;
1709                 else
1710                         Config_Error(LOG_ERR,
1711                                 "%s, line %d (section \"Server\"): Illegal port number %ld!",
1712                                 NGIRCd_ConfFile, Line, port );
1713                 return;
1714         }
1715 #ifdef SSL_SUPPORT
1716         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1717                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1718                 return;
1719         }
1720 #endif
1721         if( strcasecmp( Var, "Group" ) == 0 ) {
1722                 /* Server group */
1723                 New_Server.group = atoi( Arg );
1724                 if (!New_Server.group && strcmp(Arg, "0"))
1725                         Config_Error_NaN(Line, Var);
1726                 return;
1727         }
1728         if( strcasecmp( Var, "Passive" ) == 0 ) {
1729                 if (Check_ArgIsTrue(Arg))
1730                         New_Server.flags |= CONF_SFLAG_DISABLED;
1731                 return;
1732         }
1733         if (strcasecmp(Var, "ServiceMask") == 0) {
1734                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1735                               sizeof(New_Server.svs_mask));
1736                 if (len >= sizeof(New_Server.svs_mask))
1737                         Config_Error_TooLong(Line, Var);
1738                 return;
1739         }
1740
1741         Config_Error_Section(Line, Var, "Server");
1742 }
1743
1744 /**
1745  * Copy channel name into channel structure.
1746  *
1747  * If the channel name is not valid because of a missing prefix ('#', '&'),
1748  * a default prefix of '#' will be added.
1749  *
1750  * @param new_chan      New already allocated channel structure.
1751  * @param name          Name of the new channel.
1752  * @returns             true on success, false otherwise.
1753  */
1754 static bool
1755 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1756 {
1757         size_t size = sizeof(new_chan->name);
1758         char *dest = new_chan->name;
1759
1760         if (!Channel_IsValidName(name)) {
1761                 /*
1762                  * maybe user forgot to add a '#'.
1763                  * This is only here for user convenience.
1764                  */
1765                 *dest = '#';
1766                 --size;
1767                 ++dest;
1768         }
1769         return size > strlcpy(dest, name, size);
1770 }
1771
1772 /**
1773  * Handle variable in [Channel] configuration section.
1774  *
1775  * @param Line  Line numer in configuration file.
1776  * @param Var   Variable name.
1777  * @param Arg   Variable argument.
1778  */
1779 static void
1780 Handle_CHANNEL(int Line, char *Var, char *Arg)
1781 {
1782         size_t len;
1783         struct Conf_Channel *chan;
1784
1785         assert( Line > 0 );
1786         assert( Var != NULL );
1787         assert( Arg != NULL );
1788
1789         chan = array_get(&Conf_Channels, sizeof(*chan),
1790                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1791         if (!chan)
1792                 return;
1793
1794         if (strcasecmp(Var, "Name") == 0) {
1795                 if (!Handle_Channelname(chan, Arg))
1796                         Config_Error_TooLong(Line, Var);
1797                 return;
1798         }
1799         if (strcasecmp(Var, "Modes") == 0) {
1800                 /* Initial modes */
1801                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1802                 if (len >= sizeof(chan->modes))
1803                         Config_Error_TooLong( Line, Var );
1804                 return;
1805         }
1806         if( strcasecmp( Var, "Topic" ) == 0 ) {
1807                 /* Initial topic */
1808                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1809                 if (len >= sizeof(chan->topic))
1810                         Config_Error_TooLong( Line, Var );
1811                 return;
1812         }
1813         if( strcasecmp( Var, "Key" ) == 0 ) {
1814                 /* Initial Channel Key (mode k) */
1815                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1816                 if (len >= sizeof(chan->key))
1817                         Config_Error_TooLong(Line, Var);
1818                 return;
1819         }
1820         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1821                 /* maximum user limit, mode l */
1822                 chan->maxusers = (unsigned long) atol(Arg);
1823                 if (!chan->maxusers && strcmp(Arg, "0"))
1824                         Config_Error_NaN(Line, Var);
1825                 return;
1826         }
1827         if (strcasecmp(Var, "KeyFile") == 0) {
1828                 /* channel keys */
1829                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1830                 if (len >= sizeof(chan->keyfile))
1831                         Config_Error_TooLong(Line, Var);
1832                 return;
1833         }
1834
1835         Config_Error_Section(Line, Var, "Channel");
1836 }
1837
1838 /**
1839  * Validate server configuration.
1840  *
1841  * Please note that this function uses exit(1) on fatal errors and therefore
1842  * can result in ngIRCd terminating!
1843  *
1844  * @param Configtest    true if the daemon has been called with "--configtest".
1845  * @param Rehash        true if re-reading configuration on runtime.
1846  * @returns             true if configuration is valid.
1847  */
1848 static bool
1849 Validate_Config(bool Configtest, bool Rehash)
1850 {
1851         /* Validate configuration settings. */
1852
1853 #ifdef DEBUG
1854         int i, servers, servers_once;
1855 #endif
1856         bool config_valid = true;
1857         char *ptr;
1858
1859         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1860         ptr = Conf_ServerName;
1861         do {
1862                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1863                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1864                 if (*ptr >= '0' && *ptr <= '9') continue;
1865                 if (ptr > Conf_ServerName) {
1866                         if (*ptr == '.' || *ptr == '-')
1867                                 continue;
1868                 }
1869                 Conf_ServerName[0] = '\0';
1870                 break;
1871         } while (*(++ptr));
1872
1873         if (!Conf_ServerName[0]) {
1874                 /* No server name configured! */
1875                 config_valid = false;
1876                 Config_Error(LOG_ALERT,
1877                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1878                              NGIRCd_ConfFile);
1879                 if (!Configtest && !Rehash) {
1880                         Config_Error(LOG_ALERT,
1881                                      "%s exiting due to fatal errors!",
1882                                      PACKAGE_NAME);
1883                         exit(1);
1884                 }
1885         }
1886
1887         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1888                 /* No dot in server name! */
1889                 config_valid = false;
1890                 Config_Error(LOG_ALERT,
1891                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1892                              NGIRCd_ConfFile);
1893                 if (!Configtest) {
1894                         Config_Error(LOG_ALERT,
1895                                      "%s exiting due to fatal errors!",
1896                                      PACKAGE_NAME);
1897                         exit(1);
1898                 }
1899         }
1900
1901 #ifdef STRICT_RFC
1902         if (!Conf_ServerAdminMail[0]) {
1903                 /* No administrative contact configured! */
1904                 config_valid = false;
1905                 Config_Error(LOG_ALERT,
1906                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1907                              NGIRCd_ConfFile);
1908                 if (!Configtest) {
1909                         Config_Error(LOG_ALERT,
1910                                      "%s exiting due to fatal errors!",
1911                                      PACKAGE_NAME);
1912                         exit(1);
1913                 }
1914         }
1915 #endif
1916
1917         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1918             && !Conf_ServerAdminMail[0]) {
1919                 /* No administrative information configured! */
1920                 Config_Error(LOG_WARNING,
1921                              "No administrative information configured but required by RFC!");
1922         }
1923
1924 #ifdef PAM
1925         if (Conf_ServerPwd[0])
1926                 Config_Error(LOG_ERR,
1927                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
1928 #endif
1929
1930 #ifdef DEBUG
1931         servers = servers_once = 0;
1932         for (i = 0; i < MAX_SERVERS; i++) {
1933                 if (Conf_Server[i].name[0]) {
1934                         servers++;
1935                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1936                                 servers_once++;
1937                 }
1938         }
1939         Log(LOG_DEBUG,
1940             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
1941             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
1942             servers, servers_once,
1943             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
1944 #endif
1945
1946         return config_valid;
1947 }
1948
1949 /**
1950  * Output "line too long" warning.
1951  *
1952  * @param Line  Line number in configuration file.
1953  * @param Item  Affected variable name.
1954  */
1955 static void
1956 Config_Error_TooLong ( const int Line, const char *Item )
1957 {
1958         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
1959 }
1960
1961 /**
1962  * Output "unknown variable" warning.
1963  *
1964  * @param Line          Line number in configuration file.
1965  * @param Item          Affected variable name.
1966  * @param Section       Section name.
1967  */
1968 static void
1969 Config_Error_Section(const int Line, const char *Item, const char *Section)
1970 {
1971         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
1972                      NGIRCd_ConfFile, Line, Section, Item);
1973 }
1974
1975 /**
1976  * Output "not a number" warning.
1977  *
1978  * @param Line  Line number in configuration file.
1979  * @param Item  Affected variable name.
1980  */
1981 static void
1982 Config_Error_NaN( const int Line, const char *Item )
1983 {
1984         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
1985                                                 NGIRCd_ConfFile, Line, Item );
1986 }
1987
1988 /**
1989  * Output configuration error to console and/or logfile.
1990  *
1991  * On runtime, the normal log functions of the daemon are used. But when
1992  * testing the configuration ("--configtest"), all messages go directly
1993  * to the console.
1994  *
1995  * @param Level         Severity level of the message.
1996  * @param Format        Format string; see printf() function.
1997  */
1998 #ifdef PROTOTYPES
1999 static void Config_Error( const int Level, const char *Format, ... )
2000 #else
2001 static void Config_Error( Level, Format, va_alist )
2002 const int Level;
2003 const char *Format;
2004 va_dcl
2005 #endif
2006 {
2007         char msg[MAX_LOG_MSG_LEN];
2008         va_list ap;
2009
2010         assert( Format != NULL );
2011
2012 #ifdef PROTOTYPES
2013         va_start( ap, Format );
2014 #else
2015         va_start( ap );
2016 #endif
2017         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2018         va_end( ap );
2019
2020         if (!Use_Log) {
2021                 if (Level <= LOG_WARNING)
2022                         printf(" - %s\n", msg);
2023                 else
2024                         puts(msg);
2025         } else
2026                 Log(Level, "%s", msg);
2027 }
2028
2029 #ifdef DEBUG
2030
2031 /**
2032  * Dump internal state of the "configuration module".
2033  */
2034 GLOBAL void
2035 Conf_DebugDump(void)
2036 {
2037         int i;
2038
2039         Log(LOG_DEBUG, "Configured servers:");
2040         for (i = 0; i < MAX_SERVERS; i++) {
2041                 if (! Conf_Server[i].name[0])
2042                         continue;
2043                 Log(LOG_DEBUG,
2044                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2045                     Conf_Server[i].name, Conf_Server[i].host,
2046                     Conf_Server[i].port, Conf_Server[i].lasttry,
2047                     Conf_Server[i].group, Conf_Server[i].flags,
2048                     Conf_Server[i].conn_id);
2049         }
2050 }
2051
2052 #endif
2053
2054 /**
2055  * Initialize server configuration structur to default values.
2056  *
2057  * @param Server        Pointer to server structure to initialize.
2058  */
2059 static void
2060 Init_Server_Struct( CONF_SERVER *Server )
2061 {
2062         assert( Server != NULL );
2063
2064         memset( Server, 0, sizeof (CONF_SERVER) );
2065
2066         Server->group = NONE;
2067         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2068
2069         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2070
2071         Proc_InitStruct(&Server->res_stat);
2072         Server->conn_id = NONE;
2073         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2074 }
2075
2076 /* -eof- */