src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * Configuration management (reading, parsing & validation)
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <errno.h>
  22 #ifdef PROTOTYPES
  23 #       include <stdarg.h>
  24 #else
  25 #       include <varargs.h>
  26 #endif
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <strings.h>
  31 #include <unistd.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36
  37 #ifdef HAVE_CTYPE_H
  38 # include <ctype.h>
  39 #endif
  40
  41 #include "array.h"
  42 #include "ngircd.h"
  43 #include "conn.h"
  44 #include "channel.h"
  45 #include "defines.h"
  46 #include "log.h"
  47 #include "match.h"
  48 #include "tool.h"
  49
  50 #include "exp.h"
  51 #include "conf.h"
  52
  53
  54 static bool Use_Log = true, Using_MotdFile = true;
  55 static CONF_SERVER New_Server;
  56 static int New_Server_Idx;
  57
  58 static char Conf_MotdFile[FNAME_LEN];
  59
  60 static void Set_Defaults PARAMS(( bool InitServers ));
  61 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
  62 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
  63
  64 static void Handle_GLOBAL PARAMS(( int Line, char *Var, char *Arg ));
  65 static void Handle_LIMITS PARAMS(( int Line, char *Var, char *Arg ));
  66 static void Handle_OPTIONS PARAMS(( int Line, char *Var, char *Arg ));
  67 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
  68 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
  69 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
  70
  71 static void Config_Error PARAMS(( const int Level, const char *Format, ... ));
  72
  73 static void Config_Error_NaN PARAMS(( const int LINE, const char *Value ));
  74 static void Config_Error_Section PARAMS(( const int Line, const char *Item,
  75                                           const char *Section ));
  76 static void Config_Error_TooLong PARAMS(( const int LINE, const char *Value ));
  77
  78 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  79
  80
  81 #ifdef WANT_IPV6
  82 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  83 #else
  84 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  85 #endif
  86
  87
  88 #ifdef SSL_SUPPORT
  89
  90 static void Handle_SSL PARAMS(( int Line, char *Var, char *Ark ));
  91
  92 struct SSLOptions Conf_SSLOptions;
  93
  94 /**
  95  * Initialize SSL configuration.
  96  */
  97 static void
  98 ConfSSL_Init(void)
  99 {
 100         free(Conf_SSLOptions.KeyFile);
 101         Conf_SSLOptions.KeyFile = NULL;
 102
 103         free(Conf_SSLOptions.CertFile);
 104         Conf_SSLOptions.CertFile = NULL;
 105
 106         free(Conf_SSLOptions.DHFile);
 107         Conf_SSLOptions.DHFile = NULL;
 108         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 109 }
 110
 111 /**
 112  * Make sure that a configured file is readable.
 113  *
 114  * Currently, this function is only used for SSL-related options ...
 115  *
 116  * @param Var Configuration variable
 117  * @param Filename Configured filename
 118  */
 119 static void
 120 CheckFileReadable(const char *Var, const char *Filename)
 121 {
 122         FILE *fp;
 123
 124         if (!Filename)
 125                 return;
 126
 127         fp = fopen(Filename, "r");
 128         if (fp)
 129                 fclose(fp);
 130         else
 131                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
 132                              Filename, Var, strerror(errno));
 133 }
 134
 135 #endif
 136
 137
 138 /**
 139  * Duplicate string and warn on errors.
 140  *
 141  * @returns Pointer to string on success, NULL otherwise.
 142  */
 143 static char *
 144 strdup_warn(const char *str)
 145 {
 146         char *ptr = strdup(str);
 147         if (!ptr)
 148                 Config_Error(LOG_ERR,
 149                              "Could not allocate memory for string: %s", str);
 150         return ptr;
 151 }
 152
 153 /**
 154  * Output a comma separated list of ports (integer values).
 155  */
 156 static void
 157 ports_puts(array *a)
 158 {
 159         size_t len;
 160         UINT16 *ports;
 161         len = array_length(a, sizeof(UINT16));
 162         if (len--) {
 163                 ports = (UINT16*) array_start(a);
 164                 printf("%u", (unsigned int) *ports);
 165                 while (len--) {
 166                         ports++;
 167                         printf(", %u", (unsigned int) *ports);
 168                 }
 169         }
 170         putc('\n', stdout);
 171 }
 172
 173 /**
 174  * Parse a comma separated string into an array of port numbers (integers).
 175  */
 176 static void
 177 ports_parse(array *a, int Line, char *Arg)
 178 {
 179         char *ptr;
 180         int port;
 181         UINT16 port16;
 182
 183         array_trunc(a);
 184
 185         ptr = strtok( Arg, "," );
 186         while (ptr) {
 187                 ngt_TrimStr(ptr);
 188                 port = atoi(ptr);
 189                 if (port > 0 && port < 0xFFFF) {
 190                         port16 = (UINT16) port;
 191                         if (!array_catb(a, (char*)&port16, sizeof port16))
 192                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 193                                                         NGIRCd_ConfFile, Line, port, strerror(errno));
 194                 } else {
 195                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 196                                                                         NGIRCd_ConfFile, Line, port );
 197                 }
 198
 199                 ptr = strtok( NULL, "," );
 200         }
 201 }
 202
 203 /**
 204  * Initialize configuration module.
 205  */
 206 GLOBAL void
 207 Conf_Init( void )
 208 {
 209         Read_Config(false, true);
 210         Validate_Config(false, false);
 211 }
 212
 213 /**
 214  * "Rehash" (reload) server configuration.
 215  *
 216  * @returns true if configuration has been re-read, false on errors.
 217  */
 218 GLOBAL bool
 219 Conf_Rehash( void )
 220 {
 221         if (!Read_Config(false, false))
 222                 return false;
 223         Validate_Config(false, true);
 224
 225         /* Update CLIENT structure of local server */
 226         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 227         return true;
 228 }
 229
 230 /**
 231  * Output a boolean value as "yes/no" string.
 232  */
 233 static const char*
 234 yesno_to_str(int boolean_value)
 235 {
 236         if (boolean_value)
 237                 return "yes";
 238         return "no";
 239 }
 240
 241 /**
 242  * Free all IRC operator configuration structures.
 243  */
 244 static void
 245 opers_free(void)
 246 {
 247         struct Conf_Oper *op;
 248         size_t len;
 249
 250         len = array_length(&Conf_Opers, sizeof(*op));
 251         op = array_start(&Conf_Opers);
 252         while (len--) {
 253                 free(op->mask);
 254                 op++;
 255         }
 256         array_free(&Conf_Opers);
 257 }
 258
 259 /**
 260  * Output all IRC operator configuration structures.
 261  */
 262 static void
 263 opers_puts(void)
 264 {
 265         struct Conf_Oper *op;
 266         size_t count, i;
 267
 268         count = array_length(&Conf_Opers, sizeof(*op));
 269         op = array_start(&Conf_Opers);
 270         for (i = 0; i < count; i++, op++) {
 271                 if (!op->name[0])
 272                         continue;
 273
 274                 puts("[OPERATOR]");
 275                 printf("  Name = %s\n", op->name);
 276                 printf("  Password = %s\n", op->pwd);
 277                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 278         }
 279 }
 280
 281 /**
 282  * Read configuration, validate and output it.
 283  *
 284  * This function waits for a keypress of the user when stdin/stdout are valid
 285  * tty's ("you can read our nice message and we can read in your keypress").
 286  *
 287  * @return      0 on succes, 1 on failure(s); therefore the result code can
 288  *              directly be used by exit() when running "ngircd --configtest".
 289  */
 290 GLOBAL int
 291 Conf_Test( void )
 292 {
 293         struct passwd *pwd;
 294         struct group *grp;
 295         unsigned int i;
 296         bool config_valid;
 297         size_t predef_channel_count;
 298         struct Conf_Channel *predef_chan;
 299
 300         Use_Log = false;
 301
 302         if (!Read_Config(true, true))
 303                 return 1;
 304
 305         config_valid = Validate_Config(true, false);
 306
 307         /* Valid tty? */
 308         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
 309                 puts("OK, press enter to see a dump of your server configuration ...");
 310                 getchar();
 311         } else
 312                 puts("Ok, dump of your server configuration follows:\n");
 313
 314         puts("[GLOBAL]");
 315         printf("  Name = %s\n", Conf_ServerName);
 316         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 317         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 318         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 319         printf("  Info = %s\n", Conf_ServerInfo);
 320         printf("  Listen = %s\n", Conf_ListenAddress);
 321         if (Using_MotdFile) {
 322                 printf("  MotdFile = %s\n", Conf_MotdFile);
 323                 printf("  MotdPhrase =\n");
 324         } else {
 325                 printf("  MotdFile = \n");
 326                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 327                        ? (const char*) array_start(&Conf_Motd) : "");
 328         }
 329 #ifndef PAM
 330         printf("  Password = %s\n", Conf_ServerPwd);
 331 #endif
 332         printf("  PidFile = %s\n", Conf_PidFile);
 333         printf("  Ports = ");
 334         ports_puts(&Conf_ListenPorts);
 335         grp = getgrgid(Conf_GID);
 336         if (grp)
 337                 printf("  ServerGID = %s\n", grp->gr_name);
 338         else
 339                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 340         pwd = getpwuid(Conf_UID);
 341         if (pwd)
 342                 printf("  ServerUID = %s\n", pwd->pw_name);
 343         else
 344                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 345         puts("");
 346
 347         puts("[LIMITS]");
 348         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 349         printf("  MaxConnections = %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         if (Conf_Server[ConfServer].conn_id > NONE &&
 496             Conf_Server[ConfServer].conn_id != Idx) {
 497                 Log(LOG_ALERT,
 498                         "Trying to update connection index for already registered server \"%s\": %d/%d - ignored.",
 499                         Conf_Server[ConfServer].name,
 500                         Conf_Server[ConfServer].conn_id, Idx);
 501                 return;
 502         }
 503         Conf_Server[ConfServer].conn_id = Idx;
 504 }
 505
 506 /**
 507  * Get index of server in configuration structure.
 508  */
 509 GLOBAL int
 510 Conf_GetServer( CONN_ID Idx )
 511 {
 512         int i = 0;
 513
 514         assert( Idx > NONE );
 515
 516         for( i = 0; i < MAX_SERVERS; i++ ) {
 517                 if( Conf_Server[i].conn_id == Idx ) return i;
 518         }
 519         return NONE;
 520 }
 521
 522 /**
 523  * Enable a server by name and adjust its port number.
 524  *
 525  * @returns     true if a server has been enabled and now has a valid port
 526  *              number and host name for outgoing connections.
 527  */
 528 GLOBAL bool
 529 Conf_EnableServer( const char *Name, UINT16 Port )
 530 {
 531         int i;
 532
 533         assert( Name != NULL );
 534         for( i = 0; i < MAX_SERVERS; i++ ) {
 535                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 536                         /* Gotcha! Set port and enable server: */
 537                         Conf_Server[i].port = Port;
 538                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 539                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 540                 }
 541         }
 542         return false;
 543 }
 544
 545 /**
 546  * Enable a server by name.
 547  *
 548  * The server is only usable as outgoing server, if it has set a valid port
 549  * number for outgoing connections!
 550  * If not, you have to use Conf_EnableServer() function to make it available.
 551  *
 552  * @returns     true if a server has been enabled; false otherwise.
 553  */
 554 GLOBAL bool
 555 Conf_EnablePassiveServer(const char *Name)
 556 {
 557         int i;
 558
 559         assert( Name != NULL );
 560         for (i = 0; i < MAX_SERVERS; i++) {
 561                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
 562                     && (Conf_Server[i].port > 0)) {
 563                         /* BINGO! Enable server */
 564                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 565                         return true;
 566                 }
 567         }
 568         return false;
 569 }
 570
 571 /**
 572  * Disable a server by name.
 573  * An already established connection will be disconnected.
 574  *
 575  * @returns     true if a server was found and has been disabled.
 576  */
 577 GLOBAL bool
 578 Conf_DisableServer( const char *Name )
 579 {
 580         int i;
 581
 582         assert( Name != NULL );
 583         for( i = 0; i < MAX_SERVERS; i++ ) {
 584                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 585                         /* Gotcha! Disable and disconnect server: */
 586                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 587                         if( Conf_Server[i].conn_id > NONE )
 588                                 Conn_Close(Conf_Server[i].conn_id, NULL,
 589                                            "Server link terminated on operator request",
 590                                            true);
 591                         return true;
 592                 }
 593         }
 594         return false;
 595 }
 596
 597 /**
 598  * Add a new remote server to our configuration.
 599  *
 600  * @param Name          Name of the new server.
 601  * @param Port          Port number to connect to or 0 for incoming connections.
 602  * @param Host          Host name to connect to.
 603  * @param MyPwd         Password that will be sent to the peer.
 604  * @param PeerPwd       Password that must be received from the peer.
 605  * @returns             true if the new server has been added; false otherwise.
 606  */
 607 GLOBAL bool
 608 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
 609                const char *MyPwd, const char *PeerPwd)
 610 {
 611         int i;
 612
 613         assert( Name != NULL );
 614         assert( Host != NULL );
 615         assert( MyPwd != NULL );
 616         assert( PeerPwd != NULL );
 617
 618         /* Search unused item in server configuration structure */
 619         for( i = 0; i < MAX_SERVERS; i++ ) {
 620                 /* Is this item used? */
 621                 if( ! Conf_Server[i].name[0] ) break;
 622         }
 623         if( i >= MAX_SERVERS ) return false;
 624
 625         Init_Server_Struct( &Conf_Server[i] );
 626         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 627         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 628         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 629         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 630         Conf_Server[i].port = Port;
 631         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 632
 633         return true;
 634 }
 635
 636 /**
 637  * Check if the given nick name is an service.
 638  *
 639  * @returns true if the given nick name belongs to an "IRC service".
 640  */
 641 GLOBAL bool
 642 Conf_IsService(int ConfServer, const char *Nick)
 643 {
 644         return MatchCaseInsensitive(Conf_Server[ConfServer].svs_mask, Nick);
 645 }
 646
 647 /**
 648  * Initialize configuration settings with their default values.
 649  */
 650 static void
 651 Set_Defaults(bool InitServers)
 652 {
 653         int i;
 654
 655         /* Global */
 656         strcpy(Conf_ServerName, "");
 657         strcpy(Conf_ServerAdmin1, "");
 658         strcpy(Conf_ServerAdmin2, "");
 659         strcpy(Conf_ServerAdminMail, "");
 660         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 661                  PACKAGE_NAME, PACKAGE_VERSION);
 662         free(Conf_ListenAddress);
 663         Conf_ListenAddress = NULL;
 664         array_free(&Conf_Motd);
 665         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 666         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 667         strcpy(Conf_ServerPwd, "");
 668         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 669         Conf_UID = Conf_GID = 0;
 670
 671         /* Limits */
 672         Conf_ConnectRetry = 60;
 673         Conf_MaxConnections = 0;
 674         Conf_MaxConnectionsIP = 5;
 675         Conf_MaxJoins = 10;
 676         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 677         Conf_PingTimeout = 120;
 678         Conf_PongTimeout = 20;
 679
 680         /* Options */
 681         Conf_AllowRemoteOper = false;
 682 #ifndef STRICT_RFC
 683         Conf_AuthPing = false;
 684 #endif
 685         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 686         strcpy(Conf_CloakHost, "");
 687         Conf_CloakUserToNick = false;
 688         Conf_ConnectIPv4 = true;
 689 #ifdef WANT_IPV6
 690         Conf_ConnectIPv6 = true;
 691 #else
 692         Conf_ConnectIPv6 = false;
 693 #endif
 694         Conf_DNS = true;
 695 #ifdef IDENTAUTH
 696         Conf_Ident = true;
 697 #else
 698         Conf_Ident = false;
 699 #endif
 700         Conf_MorePrivacy = false;
 701         Conf_NoticeAuth = false;
 702         Conf_OperCanMode = false;
 703         Conf_OperServerMode = false;
 704 #ifdef PAM
 705         Conf_PAM = true;
 706 #else
 707         Conf_PAM = false;
 708 #endif
 709         Conf_PAMIsOptional = false;
 710         Conf_PredefChannelsOnly = false;
 711 #ifdef SYSLOG
 712         Conf_ScrubCTCP = false;
 713 #ifdef LOG_LOCAL5
 714         Conf_SyslogFacility = LOG_LOCAL5;
 715 #else
 716         Conf_SyslogFacility = 0;
 717 #endif
 718 #endif
 719
 720         /* Initialize server configuration structures */
 721         if (InitServers) {
 722                 for (i = 0; i < MAX_SERVERS;
 723                      Init_Server_Struct(&Conf_Server[i++]));
 724         }
 725 }
 726
 727 /**
 728  * Get number of configured listening ports.
 729  *
 730  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
 731  */
 732 static bool
 733 no_listenports(void)
 734 {
 735         size_t cnt = array_bytes(&Conf_ListenPorts);
 736 #ifdef SSL_SUPPORT
 737         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 738 #endif
 739         return cnt == 0;
 740 }
 741
 742 /**
 743  * Read MOTD ("message of the day") file.
 744  *
 745  * @param filename      Name of the file to read.
 746  */
 747 static void
 748 Read_Motd(const char *filename)
 749 {
 750         char line[127];
 751         FILE *fp;
 752
 753         if (*filename == '\0')
 754                 return;
 755
 756         fp = fopen(filename, "r");
 757         if (!fp) {
 758                 Config_Error(LOG_WARNING, "Can't read MOTD file \"%s\": %s",
 759                                         filename, strerror(errno));
 760                 return;
 761         }
 762
 763         array_free(&Conf_Motd);
 764         Using_MotdFile = true;
 765
 766         while (fgets(line, (int)sizeof line, fp)) {
 767                 ngt_TrimLastChr( line, '\n');
 768
 769                 /* add text including \0 */
 770                 if (!array_catb(&Conf_Motd, line, strlen(line) + 1)) {
 771                         Log(LOG_WARNING, "Cannot add MOTD text: %s", strerror(errno));
 772                         break;
 773                 }
 774         }
 775         fclose(fp);
 776 }
 777
 778 /**
 779  * Read ngIRCd configuration file.
 780  *
 781  * Please note that this function uses exit(1) on fatal errors and therefore
 782  * can result in ngIRCd terminating!
 783  *
 784  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
 785  * @returns                     true when the configuration file has been read
 786  *                              successfully; false otherwise.
 787  */
 788 static bool
 789 Read_Config(bool TestOnly, bool IsStarting)
 790 {
 791         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
 792         const UINT16 defaultport = 6667;
 793         int line, i, n;
 794         size_t count;
 795         FILE *fd;
 796
 797         /* Open configuration file */
 798         fd = fopen( NGIRCd_ConfFile, "r" );
 799         if( ! fd ) {
 800                 /* No configuration file found! */
 801                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 802                                         NGIRCd_ConfFile, strerror( errno ));
 803                 if (!IsStarting)
 804                         return false;
 805                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 806                 exit( 1 );
 807         }
 808
 809         opers_free();
 810         Set_Defaults(IsStarting);
 811
 812         if (TestOnly)
 813                 Config_Error(LOG_INFO,
 814                              "Reading configuration from \"%s\" ...",
 815                              NGIRCd_ConfFile );
 816
 817         /* Clean up server configuration structure: mark all already
 818          * configured servers as "once" so that they are deleted
 819          * after the next disconnect and delete all unused servers.
 820          * And delete all servers which are "duplicates" of servers
 821          * that are already marked as "once" (such servers have been
 822          * created by the last rehash but are now useless). */
 823         for( i = 0; i < MAX_SERVERS; i++ ) {
 824                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 825                 else {
 826                         /* This structure is in use ... */
 827                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 828                                 /* Check for duplicates */
 829                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 830                                         if( n == i ) continue;
 831
 832                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 833                                                 Init_Server_Struct( &Conf_Server[n] );
 834 #ifdef DEBUG
 835                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
 836                                                                                                 n, i );
 837 #endif
 838                                         }
 839                                 }
 840                         } else {
 841                                 /* Mark server as "once" */
 842                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 843                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
 844                         }
 845                 }
 846         }
 847
 848         /* Initialize variables */
 849         line = 0;
 850         strcpy( section, "" );
 851         Init_Server_Struct( &New_Server );
 852         New_Server_Idx = NONE;
 853 #ifdef SSL_SUPPORT
 854         ConfSSL_Init();
 855 #endif
 856         /* Read configuration file */
 857         while( true ) {
 858                 if( ! fgets( str, LINE_LEN, fd )) break;
 859                 ngt_TrimStr( str );
 860                 line++;
 861
 862                 /* Skip comments and empty lines */
 863                 if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
 864
 865                 /* Is this the beginning of a new section? */
 866                 if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' )) {
 867                         strlcpy( section, str, sizeof( section ));
 868                         if (strcasecmp(section, "[GLOBAL]") == 0
 869                             || strcasecmp(section, "[LIMITS]") == 0
 870                             || strcasecmp(section, "[OPTIONS]") == 0
 871 #ifdef SSL_SUPPORT
 872                             || strcasecmp(section, "[SSL]") == 0
 873 #endif
 874                             )
 875                                 continue;
 876
 877                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
 878                                 /* Check if there is already a server to add */
 879                                 if( New_Server.name[0] ) {
 880                                         /* Copy data to "real" server structure */
 881                                         assert( New_Server_Idx > NONE );
 882                                         Conf_Server[New_Server_Idx] = New_Server;
 883                                 }
 884
 885                                 /* Re-init structure for new server */
 886                                 Init_Server_Struct( &New_Server );
 887
 888                                 /* Search unused item in server configuration structure */
 889                                 for( i = 0; i < MAX_SERVERS; i++ ) {
 890                                         /* Is this item used? */
 891                                         if( ! Conf_Server[i].name[0] ) break;
 892                                 }
 893                                 if( i >= MAX_SERVERS ) {
 894                                         /* Oops, no free item found! */
 895                                         Config_Error( LOG_ERR, "Too many servers configured." );
 896                                         New_Server_Idx = NONE;
 897                                 }
 898                                 else New_Server_Idx = i;
 899                                 continue;
 900                         }
 901
 902                         if (strcasecmp(section, "[CHANNEL]") == 0) {
 903                                 count = array_length(&Conf_Channels,
 904                                                      sizeof(struct Conf_Channel));
 905                                 if (!array_alloc(&Conf_Channels,
 906                                                  sizeof(struct Conf_Channel),
 907                                                  count)) {
 908                                         Config_Error(LOG_ERR,
 909                                                      "Could not allocate memory for new operator (line %d)",
 910                                                      line);
 911                                 }
 912                                 continue;
 913                         }
 914
 915                         if (strcasecmp(section, "[OPERATOR]") == 0) {
 916                                 count = array_length(&Conf_Opers,
 917                                                      sizeof(struct Conf_Oper));
 918                                 if (!array_alloc(&Conf_Opers,
 919                                                  sizeof(struct Conf_Oper),
 920                                                  count)) {
 921                                         Config_Error(LOG_ERR,
 922                                                      "Could not allocate memory for new channel (line &d)",
 923                                                      line);
 924                                 }
 925                                 continue;
 926                         }
 927
 928                         Config_Error(LOG_ERR,
 929                                      "%s, line %d: Unknown section \"%s\"!",
 930                                      NGIRCd_ConfFile, line, section);
 931                         section[0] = 0x1;
 932                 }
 933                 if( section[0] == 0x1 ) continue;
 934
 935                 /* Split line into variable name and parameters */
 936                 ptr = strchr( str, '=' );
 937                 if( ! ptr ) {
 938                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
 939                         continue;
 940                 }
 941                 *ptr = '\0';
 942                 var = str; ngt_TrimStr( var );
 943                 arg = ptr + 1; ngt_TrimStr( arg );
 944
 945                 if(strcasecmp(section, "[GLOBAL]") == 0)
 946                         Handle_GLOBAL(line, var, arg);
 947                 else if(strcasecmp(section, "[LIMITS]") == 0)
 948                         Handle_LIMITS(line, var, arg);
 949                 else if(strcasecmp(section, "[OPTIONS]") == 0)
 950                         Handle_OPTIONS(line, var, arg);
 951 #ifdef SSL_SUPPORT
 952                 else if(strcasecmp(section, "[SSL]") == 0)
 953                         Handle_SSL(line, var, arg);
 954 #endif
 955                 else if(strcasecmp(section, "[OPERATOR]") == 0)
 956                         Handle_OPERATOR(line, var, arg);
 957                 else if(strcasecmp(section, "[SERVER]") == 0)
 958                         Handle_SERVER(line, var, arg);
 959                 else if(strcasecmp(section, "[CHANNEL]") == 0)
 960                         Handle_CHANNEL(line, var, arg);
 961                 else
 962                         Config_Error(LOG_ERR,
 963                                      "%s, line %d: Variable \"%s\" outside section!",
 964                                      NGIRCd_ConfFile, line, var);
 965         }
 966
 967         /* Close configuration file */
 968         fclose( fd );
 969
 970         /* Check if there is still a server to add */
 971         if( New_Server.name[0] ) {
 972                 /* Copy data to "real" server structure */
 973                 assert( New_Server_Idx > NONE );
 974                 Conf_Server[New_Server_Idx] = New_Server;
 975         }
 976
 977         /* not a single listening port? Add default. */
 978         if (no_listenports() &&
 979                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
 980         {
 981                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
 982                                         (unsigned int) defaultport, strerror(errno));
 983
 984                 exit(1);
 985         }
 986
 987         if (!Conf_ListenAddress)
 988                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
 989
 990         if (!Conf_ListenAddress) {
 991                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
 992                 exit(1);
 993         }
 994
 995         /* No MOTD phrase configured? (re)try motd file. */
 996         if (array_bytes(&Conf_Motd) == 0)
 997                 Read_Motd(Conf_MotdFile);
 998
 999 #ifdef SSL_SUPPORT
1000         /* Make sure that all SSL-related files are readable */
1001         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1002         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1003         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1004 #endif
1005
1006         return true;
1007 }
1008
1009 /**
1010  * Check whether a string argument is "true" or "false".
1011  *
1012  * @param Arg   Input string.
1013  * @returns     true if the input string has been parsed as "yes", "true"
1014  *              (case insensitive) or a non-zero integer value.
1015  */
1016 static bool
1017 Check_ArgIsTrue(const char *Arg)
1018 {
1019         if (strcasecmp(Arg, "yes") == 0)
1020                 return true;
1021         if (strcasecmp(Arg, "true") == 0)
1022                 return true;
1023         if (atoi(Arg) != 0)
1024                 return true;
1025
1026         return false;
1027 }
1028
1029 /**
1030  * Handle setting of "MaxNickLength".
1031  *
1032  * @param Line  Line number in configuration file.
1033  * @raram Arg   Input string.
1034  * @returns     New configured maximum nick name length.
1035  */
1036 static unsigned int
1037 Handle_MaxNickLength(int Line, const char *Arg)
1038 {
1039         unsigned new;
1040
1041         new = (unsigned) atoi(Arg) + 1;
1042         if (new > CLIENT_NICK_LEN) {
1043                 Config_Error(LOG_WARNING,
1044                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1045                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
1046                 return CLIENT_NICK_LEN;
1047         }
1048         if (new < 2) {
1049                 Config_Error(LOG_WARNING,
1050                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1051                              NGIRCd_ConfFile, Line);
1052                 return 2;
1053         }
1054         return new;
1055 }
1056
1057 /**
1058  * Output a warning messages if IDENT is configured but not compiled in.
1059  */
1060 static void
1061 WarnIdent(int UNUSED Line)
1062 {
1063 #ifndef IDENTAUTH
1064         if (Conf_Ident) {
1065                 /* user has enabled ident lookups explicitly, but ... */
1066                 Config_Error(LOG_WARNING,
1067                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1068                         NGIRCd_ConfFile, Line);
1069         }
1070 #endif
1071 }
1072
1073 /**
1074  * Output a warning messages if IPv6 is configured but not compiled in.
1075  */
1076 static void
1077 WarnIPv6(int UNUSED Line)
1078 {
1079 #ifndef WANT_IPV6
1080         if (Conf_ConnectIPv6) {
1081                 /* user has enabled IPv6 explicitly, but ... */
1082                 Config_Error(LOG_WARNING,
1083                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1084                         NGIRCd_ConfFile, Line);
1085         }
1086 #endif
1087 }
1088
1089 /**
1090  * Output a warning messages if PAM is configured but not compiled in.
1091  */
1092 static void
1093 WarnPAM(int UNUSED Line)
1094 {
1095 #ifndef PAM
1096         if (Conf_PAM) {
1097                 Config_Error(LOG_WARNING,
1098                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1099                         NGIRCd_ConfFile, Line);
1100         }
1101 #endif
1102 }
1103
1104 /**
1105  * Handle legacy "NoXXX" options in [GLOBAL] section.
1106  *
1107  * TODO: This function and support for "NoXXX" could be removed starting
1108  * with ngIRCd release 19 (one release after marking it "deprecated").
1109  *
1110  * @param Var   Variable name.
1111  * @param Arg   Argument string.
1112  * @returns     true if a NoXXX option has been processed; false otherwise.
1113  */
1114 static bool
1115 CheckLegacyNoOption(const char *Var, const char *Arg)
1116 {
1117         if(strcasecmp(Var, "NoDNS") == 0) {
1118                 Conf_DNS = !Check_ArgIsTrue( Arg );
1119                 return true;
1120         }
1121         if (strcasecmp(Var, "NoIdent") == 0) {
1122                 Conf_Ident = !Check_ArgIsTrue(Arg);
1123                 return true;
1124         }
1125         if(strcasecmp(Var, "NoPAM") == 0) {
1126                 Conf_PAM = !Check_ArgIsTrue(Arg);
1127                 return true;
1128         }
1129         return false;
1130 }
1131
1132 /**
1133  * Handle deprecated legacy options in [GLOBAL] section.
1134  *
1135  * TODO: This function and support for these options in the [Global] section
1136  * could be removed starting with ngIRCd release 19 (one release after
1137  * marking it "deprecated").
1138  *
1139  * @param Var   Variable name.
1140  * @param Arg   Argument string.
1141  * @returns     true if a legacy option has been processed; false otherwise.
1142  */
1143 static const char*
1144 CheckLegacyGlobalOption(int Line, char *Var, char *Arg)
1145 {
1146         if (strcasecmp(Var, "AllowRemoteOper") == 0
1147             || strcasecmp(Var, "ChrootDir") == 0
1148             || strcasecmp(Var, "ConnectIPv4") == 0
1149             || strcasecmp(Var, "ConnectIPv6") == 0
1150             || strcasecmp(Var, "OperCanUseMode") == 0
1151             || strcasecmp(Var, "OperServerMode") == 0
1152             || strcasecmp(Var, "PredefChannelsOnly") == 0
1153             || strcasecmp(Var, "SyslogFacility") == 0
1154             || strcasecmp(Var, "WebircPassword") == 0) {
1155                 Handle_OPTIONS(Line, Var, Arg);
1156                 return "[Options]";
1157         }
1158         if (strcasecmp(Var, "ConnectRetry") == 0
1159             || strcasecmp(Var, "MaxConnections") == 0
1160             || strcasecmp(Var, "MaxConnectionsIP") == 0
1161             || strcasecmp(Var, "MaxJoins") == 0
1162             || strcasecmp(Var, "MaxNickLength") == 0
1163             || strcasecmp(Var, "PingTimeout") == 0
1164             || strcasecmp(Var, "PongTimeout") == 0) {
1165                 Handle_LIMITS(Line, Var, Arg);
1166                 return "[Limits]";
1167         }
1168 #ifdef SSL_SUPPORT
1169         if (strcasecmp(Var, "SSLCertFile") == 0
1170             || strcasecmp(Var, "SSLDHFile") == 0
1171             || strcasecmp(Var, "SSLKeyFile") == 0
1172             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1173             || strcasecmp(Var, "SSLPorts") == 0) {
1174                 Handle_SSL(Line, Var + 3, Arg);
1175                 return "[SSL]";
1176         }
1177 #endif
1178
1179         return NULL;
1180 }
1181
1182 /**
1183  * Strip "no" prefix of a string.
1184  *
1185  * TODO: This function and support for "NoXXX" should be removed starting
1186  * with ngIRCd release 19! (One release after marking it "deprecated").
1187  *
1188  * @param str   Pointer to input string starting with "no".
1189  * @returns     New pointer to string without "no" prefix.
1190  */
1191 static const char *
1192 NoNo(const char *str)
1193 {
1194         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1195         return str + 2;
1196 }
1197
1198 /**
1199  * Invert "boolean" string.
1200  *
1201  * TODO: This function and support for "NoXXX" should be removed starting
1202  * with ngIRCd release 19! (One release after marking it "deprecated").
1203  *
1204  * @param arg   "Boolean" input string.
1205  * @returns     Pointer to inverted "boolean string".
1206  */
1207 static const char *
1208 InvertArg(const char *arg)
1209 {
1210         return yesno_to_str(!Check_ArgIsTrue(arg));
1211 }
1212
1213 /**
1214  * Handle variable in [Global] configuration section.
1215  *
1216  * @param Line  Line numer in configuration file.
1217  * @param Var   Variable name.
1218  * @param Arg   Variable argument.
1219  */
1220 static void
1221 Handle_GLOBAL( int Line, char *Var, char *Arg )
1222 {
1223         struct passwd *pwd;
1224         struct group *grp;
1225         size_t len;
1226         const char *section;
1227
1228         assert(Line > 0);
1229         assert(Var != NULL);
1230         assert(Arg != NULL);
1231
1232         if (strcasecmp(Var, "Name") == 0) {
1233                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1234                 if (len >= sizeof(Conf_ServerName))
1235                         Config_Error_TooLong(Line, Var);
1236                 return;
1237         }
1238         if (strcasecmp(Var, "AdminInfo1") == 0) {
1239                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1240                 if (len >= sizeof(Conf_ServerAdmin1))
1241                         Config_Error_TooLong(Line, Var);
1242                 return;
1243         }
1244         if (strcasecmp(Var, "AdminInfo2") == 0) {
1245                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1246                 if (len >= sizeof(Conf_ServerAdmin2))
1247                         Config_Error_TooLong(Line, Var);
1248                 return;
1249         }
1250         if (strcasecmp(Var, "AdminEMail") == 0) {
1251                 len = strlcpy(Conf_ServerAdminMail, Arg,
1252                         sizeof(Conf_ServerAdminMail));
1253                 if (len >= sizeof(Conf_ServerAdminMail))
1254                         Config_Error_TooLong(Line, Var);
1255                 return;
1256         }
1257         if (strcasecmp(Var, "Info") == 0) {
1258                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1259                 if (len >= sizeof(Conf_ServerInfo))
1260                         Config_Error_TooLong(Line, Var);
1261                 return;
1262         }
1263         if (strcasecmp(Var, "Listen") == 0) {
1264                 if (Conf_ListenAddress) {
1265                         Config_Error(LOG_ERR,
1266                                      "Multiple Listen= options, ignoring: %s",
1267                                      Arg);
1268                         return;
1269                 }
1270                 Conf_ListenAddress = strdup_warn(Arg);
1271                 /* If allocation fails, we're in trouble: we cannot ignore the
1272                  * error -- otherwise ngircd would listen on all interfaces. */
1273                 if (!Conf_ListenAddress) {
1274                         Config_Error(LOG_ALERT,
1275                                      "%s exiting due to fatal errors!",
1276                                      PACKAGE_NAME);
1277                         exit(1);
1278                 }
1279                 return;
1280         }
1281         if (strcasecmp(Var, "MotdFile") == 0) {
1282                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1283                 if (len >= sizeof(Conf_MotdFile))
1284                         Config_Error_TooLong(Line, Var);
1285                 return;
1286         }
1287         if (strcasecmp(Var, "MotdPhrase") == 0) {
1288                 len = strlen(Arg);
1289                 if (len == 0)
1290                         return;
1291                 if (len >= LINE_LEN) {
1292                         Config_Error_TooLong(Line, Var);
1293                         return;
1294                 }
1295                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1296                         Config_Error(LOG_WARNING,
1297                                      "%s, line %d: Could not append MotdPhrase: %s",
1298                                      NGIRCd_ConfFile, Line, strerror(errno));
1299                 Using_MotdFile = false;
1300                 return;
1301         }
1302         if(strcasecmp(Var, "Password") == 0) {
1303                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1304                 if (len >= sizeof(Conf_ServerPwd))
1305                         Config_Error_TooLong(Line, Var);
1306                 return;
1307         }
1308         if (strcasecmp(Var, "PidFile") == 0) {
1309                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1310                 if (len >= sizeof(Conf_PidFile))
1311                         Config_Error_TooLong(Line, Var);
1312                 return;
1313         }
1314         if (strcasecmp(Var, "Ports") == 0) {
1315                 ports_parse(&Conf_ListenPorts, Line, Arg);
1316                 return;
1317         }
1318         if (strcasecmp(Var, "ServerGID") == 0) {
1319                 grp = getgrnam(Arg);
1320                 if (grp)
1321                         Conf_GID = grp->gr_gid;
1322                 else {
1323                         Conf_GID = (unsigned int)atoi(Arg);
1324                         if (!Conf_GID && strcmp(Arg, "0"))
1325                                 Config_Error(LOG_WARNING,
1326                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1327                                              NGIRCd_ConfFile, Line, Var);
1328                 }
1329                 return;
1330         }
1331         if (strcasecmp(Var, "ServerUID") == 0) {
1332                 pwd = getpwnam(Arg);
1333                 if (pwd)
1334                         Conf_UID = pwd->pw_uid;
1335                 else {
1336                         Conf_UID = (unsigned int)atoi(Arg);
1337                         if (!Conf_UID && strcmp(Arg, "0"))
1338                                 Config_Error(LOG_WARNING,
1339                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1340                                              NGIRCd_ConfFile, Line, Var);
1341                 }
1342                 return;
1343         }
1344
1345         if (CheckLegacyNoOption(Var, Arg)) {
1346                 /* TODO: This function and support for "NoXXX" could be
1347                  * be removed starting with ngIRCd release 19 (one release
1348                  * after marking it "deprecated"). */
1349                 Config_Error(LOG_WARNING,
1350                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1351                              NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1352                 if (strcasecmp(Var, "NoIdent") == 0)
1353                         WarnIdent(Line);
1354                 else if (strcasecmp(Var, "NoPam") == 0)
1355                         WarnPAM(Line);
1356                 return;
1357         }
1358         if ((section = CheckLegacyGlobalOption(Line, Var, Arg))) {
1359                 /** TODO: This function and support for these options in the
1360                  * [Global] section could be removed starting with ngIRCd
1361                  * release 19 (one release after marking it "deprecated"). */
1362                 if (strncasecmp(Var, "SSL", 3) == 0) {
1363                         Config_Error(LOG_WARNING,
1364                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1365                                      NGIRCd_ConfFile, Line, Var, section,
1366                                      Var + 3);
1367                 } else {
1368                         Config_Error(LOG_WARNING,
1369                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1370                                      NGIRCd_ConfFile, Line, Var, section);
1371                 }
1372                 return;
1373         }
1374
1375         Config_Error_Section(Line, Var, "Global");
1376 }
1377
1378 /**
1379  * Handle variable in [Limits] configuration section.
1380  *
1381  * @param Line  Line numer in configuration file.
1382  * @param Var   Variable name.
1383  * @param Arg   Variable argument.
1384  */
1385 static void
1386 Handle_LIMITS(int Line, char *Var, char *Arg)
1387 {
1388         assert(Line > 0);
1389         assert(Var != NULL);
1390         assert(Arg != NULL);
1391
1392         if (strcasecmp(Var, "ConnectRetry") == 0) {
1393                 Conf_ConnectRetry = atoi(Arg);
1394                 if (Conf_ConnectRetry < 5) {
1395                         Config_Error(LOG_WARNING,
1396                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1397                                      NGIRCd_ConfFile, Line);
1398                         Conf_ConnectRetry = 5;
1399                 }
1400                 return;
1401         }
1402         if (strcasecmp(Var, "MaxConnections") == 0) {
1403                 Conf_MaxConnections = atol(Arg);
1404                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1405                         Config_Error_NaN(Line, Var);
1406                 return;
1407         }
1408         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1409                 Conf_MaxConnectionsIP = atoi(Arg);
1410                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1411                         Config_Error_NaN(Line, Var);
1412                 return;
1413         }
1414         if (strcasecmp(Var, "MaxJoins") == 0) {
1415                 Conf_MaxJoins = atoi(Arg);
1416                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1417                         Config_Error_NaN(Line, Var);
1418                 return;
1419         }
1420         if (strcasecmp(Var, "MaxNickLength") == 0) {
1421                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1422                 return;
1423         }
1424         if (strcasecmp(Var, "PingTimeout") == 0) {
1425                 Conf_PingTimeout = atoi(Arg);
1426                 if (Conf_PingTimeout < 5) {
1427                         Config_Error(LOG_WARNING,
1428                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1429                                      NGIRCd_ConfFile, Line);
1430                         Conf_PingTimeout = 5;
1431                 }
1432                 return;
1433         }
1434         if (strcasecmp(Var, "PongTimeout") == 0) {
1435                 Conf_PongTimeout = atoi(Arg);
1436                 if (Conf_PongTimeout < 5) {
1437                         Config_Error(LOG_WARNING,
1438                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1439                                      NGIRCd_ConfFile, Line);
1440                         Conf_PongTimeout = 5;
1441                 }
1442                 return;
1443         }
1444
1445         Config_Error_Section(Line, Var, "Limits");
1446 }
1447
1448 /**
1449  * Handle variable in [Options] configuration section.
1450  *
1451  * @param Line  Line numer in configuration file.
1452  * @param Var   Variable name.
1453  * @param Arg   Variable argument.
1454  */
1455 static void
1456 Handle_OPTIONS(int Line, char *Var, char *Arg)
1457 {
1458         size_t len;
1459
1460         assert(Line > 0);
1461         assert(Var != NULL);
1462         assert(Arg != NULL);
1463
1464         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1465                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1466                 return;
1467         }
1468         if (strcasecmp(Var, "ChrootDir") == 0) {
1469                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1470                 if (len >= sizeof(Conf_Chroot))
1471                         Config_Error_TooLong(Line, Var);
1472                 return;
1473         }
1474         if (strcasecmp(Var, "CloakHost") == 0) {
1475                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1476                 if (len >= sizeof(Conf_CloakHost))
1477                         Config_Error_TooLong(Line, Var);
1478                 return;
1479         }
1480         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1481                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1482                 return;
1483         }
1484         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1485                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1486                 WarnIPv6(Line);
1487                 return;
1488         }
1489         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1490                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1491                 return;
1492         }
1493         if (strcasecmp(Var, "DNS") == 0) {
1494                 Conf_DNS = Check_ArgIsTrue(Arg);
1495                 return;
1496         }
1497         if (strcasecmp(Var, "Ident") == 0) {
1498                 Conf_Ident = Check_ArgIsTrue(Arg);
1499                 WarnIdent(Line);
1500                 return;
1501         }
1502         if (strcasecmp(Var, "MorePrivacy") == 0) {
1503                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1504                 return;
1505         }
1506         if (strcasecmp(Var, "NoticeAuth") == 0) {
1507                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1508                 return;
1509         }
1510         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1511                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1512                 return;
1513         }
1514         if (strcasecmp(Var, "OperServerMode") == 0) {
1515                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1516                 return;
1517         }
1518         if (strcasecmp(Var, "PAM") == 0) {
1519                 Conf_PAM = Check_ArgIsTrue(Arg);
1520                 WarnPAM(Line);
1521                 return;
1522         }
1523         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1524                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1525                 return;
1526         }
1527         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1528                 Conf_PredefChannelsOnly = Check_ArgIsTrue(Arg);
1529                 return;
1530         }
1531 #ifndef STRICT_RFC
1532         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1533                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1534                 return;
1535         }
1536 #endif
1537         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1538                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1539                 return;
1540         }
1541 #ifdef SYSLOG
1542         if (strcasecmp(Var, "SyslogFacility") == 0) {
1543                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1544                                                            Conf_SyslogFacility);
1545                 return;
1546         }
1547 #endif
1548         if (strcasecmp(Var, "WebircPassword") == 0) {
1549                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1550                 if (len >= sizeof(Conf_WebircPwd))
1551                         Config_Error_TooLong(Line, Var);
1552                 return;
1553         }
1554
1555         Config_Error_Section(Line, Var, "Options");
1556 }
1557
1558 #ifdef SSL_SUPPORT
1559
1560 /**
1561  * Handle variable in [SSL] configuration section.
1562  *
1563  * @param Line  Line numer in configuration file.
1564  * @param Var   Variable name.
1565  * @param Arg   Variable argument.
1566  */
1567 static void
1568 Handle_SSL(int Line, char *Var, char *Arg)
1569 {
1570         assert(Line > 0);
1571         assert(Var != NULL);
1572         assert(Arg != NULL);
1573
1574         if (strcasecmp(Var, "CertFile") == 0) {
1575                 assert(Conf_SSLOptions.CertFile == NULL);
1576                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1577                 return;
1578         }
1579         if (strcasecmp(Var, "DHFile") == 0) {
1580                 assert(Conf_SSLOptions.DHFile == NULL);
1581                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1582                 return;
1583         }
1584         if (strcasecmp(Var, "KeyFile") == 0) {
1585                 assert(Conf_SSLOptions.KeyFile == NULL);
1586                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1587                 return;
1588         }
1589         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1590                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1591                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1592                         Config_Error(LOG_ERR,
1593                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1594                                      NGIRCd_ConfFile, Line, Var,
1595                                      strerror(errno));
1596                 return;
1597         }
1598         if (strcasecmp(Var, "Ports") == 0) {
1599                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1600                 return;
1601         }
1602
1603         Config_Error_Section(Line, Var, "SSL");
1604 }
1605
1606 #endif
1607
1608 /**
1609  * Handle variable in [Operator] configuration section.
1610  *
1611  * @param Line  Line numer in configuration file.
1612  * @param Var   Variable name.
1613  * @param Arg   Variable argument.
1614  */
1615 static void
1616 Handle_OPERATOR( int Line, char *Var, char *Arg )
1617 {
1618         size_t len;
1619         struct Conf_Oper *op;
1620
1621         assert( Line > 0 );
1622         assert( Var != NULL );
1623         assert( Arg != NULL );
1624
1625         op = array_get(&Conf_Opers, sizeof(*op),
1626                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1627         if (!op)
1628                 return;
1629
1630         if (strcasecmp(Var, "Name") == 0) {
1631                 /* Name of IRC operator */
1632                 len = strlcpy(op->name, Arg, sizeof(op->name));
1633                 if (len >= sizeof(op->name))
1634                                 Config_Error_TooLong(Line, Var);
1635                 return;
1636         }
1637         if (strcasecmp(Var, "Password") == 0) {
1638                 /* Password of IRC operator */
1639                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1640                 if (len >= sizeof(op->pwd))
1641                                 Config_Error_TooLong(Line, Var);
1642                 return;
1643         }
1644         if (strcasecmp(Var, "Mask") == 0) {
1645                 if (op->mask)
1646                         return; /* Hostname already configured */
1647                 op->mask = strdup_warn( Arg );
1648                 return;
1649         }
1650
1651         Config_Error_Section(Line, Var, "Operator");
1652 }
1653
1654 /**
1655  * Handle variable in [Server] configuration section.
1656  *
1657  * @param Line  Line numer in configuration file.
1658  * @param Var   Variable name.
1659  * @param Arg   Variable argument.
1660  */
1661 static void
1662 Handle_SERVER( int Line, char *Var, char *Arg )
1663 {
1664         long port;
1665         size_t len;
1666
1667         assert( Line > 0 );
1668         assert( Var != NULL );
1669         assert( Arg != NULL );
1670
1671         /* Ignore server block if no space is left in server configuration structure */
1672         if( New_Server_Idx <= NONE ) return;
1673
1674         if( strcasecmp( Var, "Host" ) == 0 ) {
1675                 /* Hostname of the server */
1676                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1677                 if (len >= sizeof( New_Server.host ))
1678                         Config_Error_TooLong ( Line, Var );
1679                 return;
1680         }
1681         if( strcasecmp( Var, "Name" ) == 0 ) {
1682                 /* Name of the server ("Nick"/"ID") */
1683                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1684                 if (len >= sizeof( New_Server.name ))
1685                         Config_Error_TooLong( Line, Var );
1686                 return;
1687         }
1688         if (strcasecmp(Var, "Bind") == 0) {
1689                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1690                         return;
1691
1692                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1693                                 NGIRCd_ConfFile, Line, Arg);
1694                 return;
1695         }
1696         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1697                 /* Password of this server which is sent to the peer */
1698                 if (*Arg == ':') {
1699                         Config_Error(LOG_ERR,
1700                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1701                                                                                 NGIRCd_ConfFile, Line);
1702                 }
1703                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1704                 if (len >= sizeof( New_Server.pwd_in ))
1705                         Config_Error_TooLong( Line, Var );
1706                 return;
1707         }
1708         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1709                 /* Passwort of the peer which must be received */
1710                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1711                 if (len >= sizeof( New_Server.pwd_out ))
1712                         Config_Error_TooLong( Line, Var );
1713                 return;
1714         }
1715         if( strcasecmp( Var, "Port" ) == 0 ) {
1716                 /* Port to which this server should connect */
1717                 port = atol( Arg );
1718                 if (port >= 0 && port < 0xFFFF)
1719                         New_Server.port = (UINT16)port;
1720                 else
1721                         Config_Error(LOG_ERR,
1722                                 "%s, line %d (section \"Server\"): Illegal port number %ld!",
1723                                 NGIRCd_ConfFile, Line, port );
1724                 return;
1725         }
1726 #ifdef SSL_SUPPORT
1727         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1728                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1729                 return;
1730         }
1731 #endif
1732         if( strcasecmp( Var, "Group" ) == 0 ) {
1733                 /* Server group */
1734                 New_Server.group = atoi( Arg );
1735                 if (!New_Server.group && strcmp(Arg, "0"))
1736                         Config_Error_NaN(Line, Var);
1737                 return;
1738         }
1739         if( strcasecmp( Var, "Passive" ) == 0 ) {
1740                 if (Check_ArgIsTrue(Arg))
1741                         New_Server.flags |= CONF_SFLAG_DISABLED;
1742                 return;
1743         }
1744         if (strcasecmp(Var, "ServiceMask") == 0) {
1745                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1746                               sizeof(New_Server.svs_mask));
1747                 if (len >= sizeof(New_Server.svs_mask))
1748                         Config_Error_TooLong(Line, Var);
1749                 return;
1750         }
1751
1752         Config_Error_Section(Line, Var, "Server");
1753 }
1754
1755 /**
1756  * Copy channel name into channel structure.
1757  *
1758  * If the channel name is not valid because of a missing prefix ('#', '&'),
1759  * a default prefix of '#' will be added.
1760  *
1761  * @param new_chan      New already allocated channel structure.
1762  * @param name          Name of the new channel.
1763  * @returns             true on success, false otherwise.
1764  */
1765 static bool
1766 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1767 {
1768         size_t size = sizeof(new_chan->name);
1769         char *dest = new_chan->name;
1770
1771         if (!Channel_IsValidName(name)) {
1772                 /*
1773                  * maybe user forgot to add a '#'.
1774                  * This is only here for user convenience.
1775                  */
1776                 *dest = '#';
1777                 --size;
1778                 ++dest;
1779         }
1780         return size > strlcpy(dest, name, size);
1781 }
1782
1783 /**
1784  * Handle variable in [Channel] configuration section.
1785  *
1786  * @param Line  Line numer in configuration file.
1787  * @param Var   Variable name.
1788  * @param Arg   Variable argument.
1789  */
1790 static void
1791 Handle_CHANNEL(int Line, char *Var, char *Arg)
1792 {
1793         size_t len;
1794         struct Conf_Channel *chan;
1795
1796         assert( Line > 0 );
1797         assert( Var != NULL );
1798         assert( Arg != NULL );
1799
1800         chan = array_get(&Conf_Channels, sizeof(*chan),
1801                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1802         if (!chan)
1803                 return;
1804
1805         if (strcasecmp(Var, "Name") == 0) {
1806                 if (!Handle_Channelname(chan, Arg))
1807                         Config_Error_TooLong(Line, Var);
1808                 return;
1809         }
1810         if (strcasecmp(Var, "Modes") == 0) {
1811                 /* Initial modes */
1812                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1813                 if (len >= sizeof(chan->modes))
1814                         Config_Error_TooLong( Line, Var );
1815                 return;
1816         }
1817         if( strcasecmp( Var, "Topic" ) == 0 ) {
1818                 /* Initial topic */
1819                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1820                 if (len >= sizeof(chan->topic))
1821                         Config_Error_TooLong( Line, Var );
1822                 return;
1823         }
1824         if( strcasecmp( Var, "Key" ) == 0 ) {
1825                 /* Initial Channel Key (mode k) */
1826                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1827                 if (len >= sizeof(chan->key))
1828                         Config_Error_TooLong(Line, Var);
1829                 return;
1830         }
1831         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1832                 /* maximum user limit, mode l */
1833                 chan->maxusers = (unsigned long) atol(Arg);
1834                 if (!chan->maxusers && strcmp(Arg, "0"))
1835                         Config_Error_NaN(Line, Var);
1836                 return;
1837         }
1838         if (strcasecmp(Var, "KeyFile") == 0) {
1839                 /* channel keys */
1840                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1841                 if (len >= sizeof(chan->keyfile))
1842                         Config_Error_TooLong(Line, Var);
1843                 return;
1844         }
1845
1846         Config_Error_Section(Line, Var, "Channel");
1847 }
1848
1849 /**
1850  * Validate server configuration.
1851  *
1852  * Please note that this function uses exit(1) on fatal errors and therefore
1853  * can result in ngIRCd terminating!
1854  *
1855  * @param Configtest    true if the daemon has been called with "--configtest".
1856  * @param Rehash        true if re-reading configuration on runtime.
1857  * @returns             true if configuration is valid.
1858  */
1859 static bool
1860 Validate_Config(bool Configtest, bool Rehash)
1861 {
1862         /* Validate configuration settings. */
1863
1864 #ifdef DEBUG
1865         int i, servers, servers_once;
1866 #endif
1867         bool config_valid = true;
1868         char *ptr;
1869
1870         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1871         ptr = Conf_ServerName;
1872         do {
1873                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1874                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1875                 if (*ptr >= '0' && *ptr <= '9') continue;
1876                 if (ptr > Conf_ServerName) {
1877                         if (*ptr == '.' || *ptr == '-')
1878                                 continue;
1879                 }
1880                 Conf_ServerName[0] = '\0';
1881                 break;
1882         } while (*(++ptr));
1883
1884         if (!Conf_ServerName[0]) {
1885                 /* No server name configured! */
1886                 config_valid = false;
1887                 Config_Error(LOG_ALERT,
1888                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1889                              NGIRCd_ConfFile);
1890                 if (!Configtest && !Rehash) {
1891                         Config_Error(LOG_ALERT,
1892                                      "%s exiting due to fatal errors!",
1893                                      PACKAGE_NAME);
1894                         exit(1);
1895                 }
1896         }
1897
1898         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1899                 /* No dot in server name! */
1900                 config_valid = false;
1901                 Config_Error(LOG_ALERT,
1902                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1903                              NGIRCd_ConfFile);
1904                 if (!Configtest) {
1905                         Config_Error(LOG_ALERT,
1906                                      "%s exiting due to fatal errors!",
1907                                      PACKAGE_NAME);
1908                         exit(1);
1909                 }
1910         }
1911
1912 #ifdef STRICT_RFC
1913         if (!Conf_ServerAdminMail[0]) {
1914                 /* No administrative contact configured! */
1915                 config_valid = false;
1916                 Config_Error(LOG_ALERT,
1917                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1918                              NGIRCd_ConfFile);
1919                 if (!Configtest) {
1920                         Config_Error(LOG_ALERT,
1921                                      "%s exiting due to fatal errors!",
1922                                      PACKAGE_NAME);
1923                         exit(1);
1924                 }
1925         }
1926 #endif
1927
1928         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1929             && !Conf_ServerAdminMail[0]) {
1930                 /* No administrative information configured! */
1931                 Config_Error(LOG_WARNING,
1932                              "No administrative information configured but required by RFC!");
1933         }
1934
1935 #ifdef PAM
1936         if (Conf_ServerPwd[0])
1937                 Config_Error(LOG_ERR,
1938                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
1939 #endif
1940
1941 #ifdef DEBUG
1942         servers = servers_once = 0;
1943         for (i = 0; i < MAX_SERVERS; i++) {
1944                 if (Conf_Server[i].name[0]) {
1945                         servers++;
1946                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1947                                 servers_once++;
1948                 }
1949         }
1950         Log(LOG_DEBUG,
1951             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
1952             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
1953             servers, servers_once,
1954             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
1955 #endif
1956
1957         return config_valid;
1958 }
1959
1960 /**
1961  * Output "line too long" warning.
1962  *
1963  * @param Line  Line number in configuration file.
1964  * @param Item  Affected variable name.
1965  */
1966 static void
1967 Config_Error_TooLong ( const int Line, const char *Item )
1968 {
1969         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
1970 }
1971
1972 /**
1973  * Output "unknown variable" warning.
1974  *
1975  * @param Line          Line number in configuration file.
1976  * @param Item          Affected variable name.
1977  * @param Section       Section name.
1978  */
1979 static void
1980 Config_Error_Section(const int Line, const char *Item, const char *Section)
1981 {
1982         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
1983                      NGIRCd_ConfFile, Line, Section, Item);
1984 }
1985
1986 /**
1987  * Output "not a number" warning.
1988  *
1989  * @param Line  Line number in configuration file.
1990  * @param Item  Affected variable name.
1991  */
1992 static void
1993 Config_Error_NaN( const int Line, const char *Item )
1994 {
1995         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
1996                                                 NGIRCd_ConfFile, Line, Item );
1997 }
1998
1999 /**
2000  * Output configuration error to console and/or logfile.
2001  *
2002  * On runtime, the normal log functions of the daemon are used. But when
2003  * testing the configuration ("--configtest"), all messages go directly
2004  * to the console.
2005  *
2006  * @param Level         Severity level of the message.
2007  * @param Format        Format string; see printf() function.
2008  */
2009 #ifdef PROTOTYPES
2010 static void Config_Error( const int Level, const char *Format, ... )
2011 #else
2012 static void Config_Error( Level, Format, va_alist )
2013 const int Level;
2014 const char *Format;
2015 va_dcl
2016 #endif
2017 {
2018         char msg[MAX_LOG_MSG_LEN];
2019         va_list ap;
2020
2021         assert( Format != NULL );
2022
2023 #ifdef PROTOTYPES
2024         va_start( ap, Format );
2025 #else
2026         va_start( ap );
2027 #endif
2028         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2029         va_end( ap );
2030
2031         if (!Use_Log) {
2032                 if (Level <= LOG_WARNING)
2033                         printf(" - %s\n", msg);
2034                 else
2035                         puts(msg);
2036         } else
2037                 Log(Level, "%s", msg);
2038 }
2039
2040 #ifdef DEBUG
2041
2042 /**
2043  * Dump internal state of the "configuration module".
2044  */
2045 GLOBAL void
2046 Conf_DebugDump(void)
2047 {
2048         int i;
2049
2050         Log(LOG_DEBUG, "Configured servers:");
2051         for (i = 0; i < MAX_SERVERS; i++) {
2052                 if (! Conf_Server[i].name[0])
2053                         continue;
2054                 Log(LOG_DEBUG,
2055                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2056                     Conf_Server[i].name, Conf_Server[i].host,
2057                     Conf_Server[i].port, Conf_Server[i].lasttry,
2058                     Conf_Server[i].group, Conf_Server[i].flags,
2059                     Conf_Server[i].conn_id);
2060         }
2061 }
2062
2063 #endif
2064
2065 /**
2066  * Initialize server configuration structur to default values.
2067  *
2068  * @param Server        Pointer to server structure to initialize.
2069  */
2070 static void
2071 Init_Server_Struct( CONF_SERVER *Server )
2072 {
2073         assert( Server != NULL );
2074
2075         memset( Server, 0, sizeof (CONF_SERVER) );
2076
2077         Server->group = NONE;
2078         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2079
2080         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2081
2082         Proc_InitStruct(&Server->res_stat);
2083         Server->conn_id = NONE;
2084         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2085 }
2086
2087 /* -eof- */