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