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