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