src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2013 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 #include <dirent.h>
  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 static char Conf_HelpFile[FNAME_LEN];
  58 static char Conf_IncludeDir[FNAME_LEN];
  59
  60 static void Set_Defaults PARAMS(( bool InitServers ));
  61 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
  62 static void Read_Config_File PARAMS(( const char *File, FILE *fd ));
  63 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
  64
  65 static void Handle_GLOBAL PARAMS((const char *File, int Line,
  66                                   char *Var, char *Arg ));
  67 static void Handle_LIMITS PARAMS((const char *File, int Line,
  68                                   char *Var, char *Arg ));
  69 static void Handle_OPTIONS PARAMS((const char *File, int Line,
  70                                    char *Var, char *Arg ));
  71 static void Handle_OPERATOR PARAMS((const char *File, int Line,
  72                                     char *Var, char *Arg ));
  73 static void Handle_SERVER PARAMS((const char *File, int Line,
  74                                   char *Var, char *Arg ));
  75 static void Handle_CHANNEL PARAMS((const char *File, int Line,
  76                                    char *Var, char *Arg ));
  77
  78 static void Config_Error PARAMS((const int Level, const char *Format, ...));
  79
  80 static void Config_Error_NaN PARAMS((const char *File, const int LINE,
  81                                      const char *Value));
  82 static void Config_Error_Section PARAMS((const char *File, const int Line,
  83                                          const char *Item, const char *Section));
  84 static void Config_Error_TooLong PARAMS((const char *File, const int LINE,
  85                                          const char *Value));
  86
  87 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  88
  89
  90 #ifdef WANT_IPV6
  91 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  92 #else
  93 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  94 #endif
  95
  96 #ifdef HAVE_LIBSSL
  97 #define DEFAULT_CIPHERS         "HIGH:!aNULL:@STRENGTH"
  98 #endif
  99 #ifdef HAVE_LIBGNUTLS
 100 #define DEFAULT_CIPHERS         "SECURE128"
 101 #endif
 102
 103 #ifdef SSL_SUPPORT
 104
 105 static void Handle_SSL PARAMS((const char *File, int Line, char *Var, char *Ark));
 106
 107 struct SSLOptions Conf_SSLOptions;
 108
 109 /**
 110  * Initialize SSL configuration.
 111  */
 112 static void
 113 ConfSSL_Init(void)
 114 {
 115         free(Conf_SSLOptions.KeyFile);
 116         Conf_SSLOptions.KeyFile = NULL;
 117
 118         free(Conf_SSLOptions.CertFile);
 119         Conf_SSLOptions.CertFile = NULL;
 120
 121         free(Conf_SSLOptions.DHFile);
 122         Conf_SSLOptions.DHFile = NULL;
 123         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 124
 125         array_free(&Conf_SSLOptions.ListenPorts);
 126
 127         free(Conf_SSLOptions.CipherList);
 128         Conf_SSLOptions.CipherList = NULL;
 129 }
 130
 131 /**
 132  * Check if the current configuration uses/requires SSL.
 133  *
 134  * @returns true if SSL is used and should be initialized.
 135  */
 136 GLOBAL bool
 137 Conf_SSLInUse(void)
 138 {
 139         int i;
 140
 141         /* SSL listen ports configured? */
 142         if (array_bytes(&Conf_SSLOptions.ListenPorts))
 143                 return true;
 144
 145         for (i = 0; i < MAX_SERVERS; i++) {
 146                 if (Conf_Server[i].port > 0
 147                     && Conf_Server[i].SSLConnect)
 148                         return true;
 149         }
 150         return false;
 151 }
 152
 153 /**
 154  * Make sure that a configured file is readable.
 155  *
 156  * Currently, this function is only used for SSL-related options ...
 157  *
 158  * @param Var Configuration variable
 159  * @param Filename Configured filename
 160  */
 161 static void
 162 CheckFileReadable(const char *Var, const char *Filename)
 163 {
 164         FILE *fp;
 165
 166         if (!Filename)
 167                 return;
 168
 169         fp = fopen(Filename, "r");
 170         if (fp)
 171                 fclose(fp);
 172         else
 173                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
 174                              Filename, Var, strerror(errno));
 175 }
 176
 177 #endif
 178
 179
 180 /**
 181  * Duplicate string and warn on errors.
 182  *
 183  * @returns Pointer to string on success, NULL otherwise.
 184  */
 185 static char *
 186 strdup_warn(const char *str)
 187 {
 188         char *ptr = strdup(str);
 189         if (!ptr)
 190                 Config_Error(LOG_ERR,
 191                              "Could not allocate memory for string: %s", str);
 192         return ptr;
 193 }
 194
 195 /**
 196  * Output a comma separated list of ports (integer values).
 197  */
 198 static void
 199 ports_puts(array *a)
 200 {
 201         size_t len;
 202         UINT16 *ports;
 203         len = array_length(a, sizeof(UINT16));
 204         if (len--) {
 205                 ports = (UINT16*) array_start(a);
 206                 printf("%u", (unsigned int) *ports);
 207                 while (len--) {
 208                         ports++;
 209                         printf(", %u", (unsigned int) *ports);
 210                 }
 211         }
 212         putc('\n', stdout);
 213 }
 214
 215 /**
 216  * Parse a comma separated string into an array of port numbers (integers).
 217  */
 218 static void
 219 ports_parse(array *a, const char *File, int Line, char *Arg)
 220 {
 221         char *ptr;
 222         int port;
 223         UINT16 port16;
 224
 225         array_trunc(a);
 226
 227         ptr = strtok( Arg, "," );
 228         while (ptr) {
 229                 ngt_TrimStr(ptr);
 230                 port = atoi(ptr);
 231                 if (port > 0 && port < 0xFFFF) {
 232                         port16 = (UINT16) port;
 233                         if (!array_catb(a, (char*)&port16, sizeof port16))
 234                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 235                                              File, Line, port, strerror(errno));
 236                 } else {
 237                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 238                                      File, Line, port );
 239                 }
 240
 241                 ptr = strtok( NULL, "," );
 242         }
 243 }
 244
 245 /**
 246  * Initialize configuration module.
 247  */
 248 GLOBAL void
 249 Conf_Init( void )
 250 {
 251         Read_Config(false, true);
 252         Validate_Config(false, false);
 253 }
 254
 255 /**
 256  * "Rehash" (reload) server configuration.
 257  *
 258  * @returns true if configuration has been re-read, false on errors.
 259  */
 260 GLOBAL bool
 261 Conf_Rehash( void )
 262 {
 263         if (!Read_Config(false, false))
 264                 return false;
 265         Validate_Config(false, true);
 266
 267         /* Update CLIENT structure of local server */
 268         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 269         return true;
 270 }
 271
 272 /**
 273  * Output a boolean value as "yes/no" string.
 274  */
 275 static const char*
 276 yesno_to_str(int boolean_value)
 277 {
 278         if (boolean_value)
 279                 return "yes";
 280         return "no";
 281 }
 282
 283 /**
 284  * Free all IRC operator configuration structures.
 285  */
 286 static void
 287 opers_free(void)
 288 {
 289         struct Conf_Oper *op;
 290         size_t len;
 291
 292         len = array_length(&Conf_Opers, sizeof(*op));
 293         op = array_start(&Conf_Opers);
 294         while (len--) {
 295                 free(op->mask);
 296                 op++;
 297         }
 298         array_free(&Conf_Opers);
 299 }
 300
 301 /**
 302  * Output all IRC operator configuration structures.
 303  */
 304 static void
 305 opers_puts(void)
 306 {
 307         struct Conf_Oper *op;
 308         size_t count, i;
 309
 310         count = array_length(&Conf_Opers, sizeof(*op));
 311         op = array_start(&Conf_Opers);
 312         for (i = 0; i < count; i++, op++) {
 313                 if (!op->name[0])
 314                         continue;
 315
 316                 puts("[OPERATOR]");
 317                 printf("  Name = %s\n", op->name);
 318                 printf("  Password = %s\n", op->pwd);
 319                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 320         }
 321 }
 322
 323 /**
 324  * Read configuration, validate and output it.
 325  *
 326  * This function waits for a keypress of the user when stdin/stdout are valid
 327  * tty's ("you can read our nice message and we can read in your keypress").
 328  *
 329  * @return      0 on success, 1 on failure(s); therefore the result code can
 330  *              directly be used by exit() when running "ngircd --configtest".
 331  */
 332 GLOBAL int
 333 Conf_Test( void )
 334 {
 335         struct passwd *pwd;
 336         struct group *grp;
 337         unsigned int i;
 338         bool config_valid;
 339         size_t predef_channel_count;
 340         struct Conf_Channel *predef_chan;
 341
 342         Use_Log = false;
 343
 344         if (!Read_Config(true, true))
 345                 return 1;
 346
 347         config_valid = Validate_Config(true, false);
 348
 349         /* Valid tty? */
 350         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
 351                 puts("OK, press enter to see a dump of your server configuration ...");
 352                 getchar();
 353         } else
 354                 puts("Ok, dump of your server configuration follows:\n");
 355
 356         puts("[GLOBAL]");
 357         printf("  Name = %s\n", Conf_ServerName);
 358         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 359         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 360         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 361         printf("  HelpFile = %s\n", Conf_HelpFile);
 362         printf("  Info = %s\n", Conf_ServerInfo);
 363         printf("  Listen = %s\n", Conf_ListenAddress);
 364         if (Using_MotdFile) {
 365                 printf("  MotdFile = %s\n", Conf_MotdFile);
 366                 printf("  MotdPhrase =\n");
 367         } else {
 368                 printf("  MotdFile = \n");
 369                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 370                        ? (const char*) array_start(&Conf_Motd) : "");
 371         }
 372         printf("  Network = %s\n", Conf_Network);
 373         if (!Conf_PAM)
 374                 printf("  Password = %s\n", Conf_ServerPwd);
 375         printf("  PidFile = %s\n", Conf_PidFile);
 376         printf("  Ports = ");
 377         ports_puts(&Conf_ListenPorts);
 378         grp = getgrgid(Conf_GID);
 379         if (grp)
 380                 printf("  ServerGID = %s\n", grp->gr_name);
 381         else
 382                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 383         pwd = getpwuid(Conf_UID);
 384         if (pwd)
 385                 printf("  ServerUID = %s\n", pwd->pw_name);
 386         else
 387                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 388         puts("");
 389
 390         puts("[LIMITS]");
 391         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 392         printf("  IdleTimeout = %d\n", Conf_IdleTimeout);
 393         printf("  MaxConnections = %d\n", Conf_MaxConnections);
 394         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
 395         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
 396         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
 397         printf("  MaxListSize = %d\n", Conf_MaxListSize);
 398         printf("  PingTimeout = %d\n", Conf_PingTimeout);
 399         printf("  PongTimeout = %d\n", Conf_PongTimeout);
 400         puts("");
 401
 402         puts("[OPTIONS]");
 403         printf("  AllowedChannelTypes = %s\n", Conf_AllowedChannelTypes);
 404         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 405         printf("  ChrootDir = %s\n", Conf_Chroot);
 406         printf("  CloakHost = %s\n", Conf_CloakHost);
 407         printf("  CloakHostModeX = %s\n", Conf_CloakHostModeX);
 408         printf("  CloakHostSalt = %s\n", Conf_CloakHostSalt);
 409         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
 410 #ifdef WANT_IPV6
 411         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 412         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
 413 #endif
 414         printf("  DefaultUserModes = %s\n", Conf_DefaultUserModes);
 415         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 416 #ifdef IDENT
 417         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 418 #endif
 419         printf("  IncludeDir = %s\n", Conf_IncludeDir);
 420         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
 421         printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
 422         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
 423         printf("  OperChanPAutoOp = %s\n", yesno_to_str(Conf_OperChanPAutoOp));
 424         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 425 #ifdef PAM
 426         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
 427         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
 428 #endif
 429 #ifndef STRICT_RFC
 430         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
 431 #endif
 432         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
 433 #ifdef SYSLOG
 434         printf("  SyslogFacility = %s\n",
 435                ngt_SyslogFacilityName(Conf_SyslogFacility));
 436 #endif
 437         printf("  WebircPassword = %s\n", Conf_WebircPwd);
 438         puts("");
 439
 440 #ifdef SSL_SUPPORT
 441         puts("[SSL]");
 442         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
 443                                         ? Conf_SSLOptions.CertFile : "");
 444         printf("  CipherList = %s\n", Conf_SSLOptions.CipherList ?
 445                Conf_SSLOptions.CipherList : DEFAULT_CIPHERS);
 446         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
 447                                         ? Conf_SSLOptions.DHFile : "");
 448         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
 449                                         ? Conf_SSLOptions.KeyFile : "");
 450         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
 451                 puts("  KeyFilePassword = <secret>");
 452         else
 453                 puts("  KeyFilePassword = ");
 454         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 455         printf("  Ports = ");
 456         ports_puts(&Conf_SSLOptions.ListenPorts);
 457         puts("");
 458 #endif
 459
 460         opers_puts();
 461
 462         for( i = 0; i < MAX_SERVERS; i++ ) {
 463                 if( ! Conf_Server[i].name[0] ) continue;
 464
 465                 /* Valid "Server" section */
 466                 puts( "[SERVER]" );
 467                 printf( "  Name = %s\n", Conf_Server[i].name );
 468                 printf( "  Host = %s\n", Conf_Server[i].host );
 469                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
 470 #ifdef SSL_SUPPORT
 471                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
 472 #endif
 473                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
 474                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
 475                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
 476                 printf( "  Group = %d\n", Conf_Server[i].group );
 477                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
 478         }
 479
 480         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
 481         predef_chan = array_start(&Conf_Channels);
 482
 483         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
 484                 if (!predef_chan->name[0])
 485                         continue;
 486
 487                 /* Valid "Channel" section */
 488                 puts( "[CHANNEL]" );
 489                 printf("  Name = %s\n", predef_chan->name);
 490                 printf("  Modes = %s\n", predef_chan->modes);
 491                 printf("  Key = %s\n", predef_chan->key);
 492                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
 493                 printf("  Topic = %s\n", predef_chan->topic);
 494                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
 495         }
 496
 497         return (config_valid ? 0 : 1);
 498 }
 499
 500 /**
 501  * Remove connection information from configured server.
 502  *
 503  * If the server is set as "once", delete it from our configuration;
 504  * otherwise set the time for the next connection attempt.
 505  *
 506  * Non-server connections will be silently ignored.
 507  */
 508 GLOBAL void
 509 Conf_UnsetServer( CONN_ID Idx )
 510 {
 511         int i;
 512         time_t t;
 513
 514         /* Check all our configured servers */
 515         for( i = 0; i < MAX_SERVERS; i++ ) {
 516                 if( Conf_Server[i].conn_id != Idx ) continue;
 517
 518                 /* Gotcha! Mark server configuration as "unused": */
 519                 Conf_Server[i].conn_id = NONE;
 520
 521                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 522                         /* Delete configuration here */
 523                         Init_Server_Struct( &Conf_Server[i] );
 524                 } else {
 525                         /* Set time for next connect attempt */
 526                         t = time(NULL);
 527                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
 528                                 /* The connection has been "long", so we don't
 529                                  * require the next attempt to be delayed. */
 530                                 Conf_Server[i].lasttry =
 531                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
 532                         } else {
 533                                 /* "Short" connection, enforce "ConnectRetry"
 534                                  * but randomize it a little bit: 15 seconds. */
 535                                 Conf_Server[i].lasttry =
 536 #ifdef HAVE_ARC4RANDOM
 537                                         t + (arc4random() % 15);
 538 #else
 539                                         t + rand() / (RAND_MAX / 15);
 540 #endif
 541                         }
 542                 }
 543         }
 544 }
 545
 546 /**
 547  * Set connection information for specified configured server.
 548  */
 549 GLOBAL bool
 550 Conf_SetServer( int ConfServer, CONN_ID Idx )
 551 {
 552         assert( ConfServer > NONE );
 553         assert( Idx > NONE );
 554
 555         if (Conf_Server[ConfServer].conn_id > NONE &&
 556             Conf_Server[ConfServer].conn_id != Idx) {
 557                 Log(LOG_ERR,
 558                     "Connection %d: Server configuration of \"%s\" already in use by connection %d!",
 559                     Idx, Conf_Server[ConfServer].name,
 560                     Conf_Server[ConfServer].conn_id);
 561                 Conn_Close(Idx, NULL, "Server configuration already in use", true);
 562                 return false;
 563         }
 564         Conf_Server[ConfServer].conn_id = Idx;
 565         return true;
 566 }
 567
 568 /**
 569  * Get index of server in configuration structure.
 570  */
 571 GLOBAL int
 572 Conf_GetServer( CONN_ID Idx )
 573 {
 574         int i = 0;
 575
 576         assert( Idx > NONE );
 577
 578         for( i = 0; i < MAX_SERVERS; i++ ) {
 579                 if( Conf_Server[i].conn_id == Idx ) return i;
 580         }
 581         return NONE;
 582 }
 583
 584 /**
 585  * Enable a server by name and adjust its port number.
 586  *
 587  * @returns     true if a server has been enabled and now has a valid port
 588  *              number and host name for outgoing connections.
 589  */
 590 GLOBAL bool
 591 Conf_EnableServer( const char *Name, UINT16 Port )
 592 {
 593         int i;
 594
 595         assert( Name != NULL );
 596         for( i = 0; i < MAX_SERVERS; i++ ) {
 597                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 598                         /* Gotcha! Set port and enable server: */
 599                         Conf_Server[i].port = Port;
 600                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 601                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 602                 }
 603         }
 604         return false;
 605 }
 606
 607 /**
 608  * Enable a server by name.
 609  *
 610  * The server is only usable as outgoing server, if it has set a valid port
 611  * number for outgoing connections!
 612  * If not, you have to use Conf_EnableServer() function to make it available.
 613  *
 614  * @returns     true if a server has been enabled; false otherwise.
 615  */
 616 GLOBAL bool
 617 Conf_EnablePassiveServer(const char *Name)
 618 {
 619         int i;
 620
 621         assert( Name != NULL );
 622         for (i = 0; i < MAX_SERVERS; i++) {
 623                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
 624                     && (Conf_Server[i].port > 0)) {
 625                         /* BINGO! Enable server */
 626                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 627                         return true;
 628                 }
 629         }
 630         return false;
 631 }
 632
 633 /**
 634  * Disable a server by name.
 635  * An already established connection will be disconnected.
 636  *
 637  * @returns     true if a server was found and has been disabled.
 638  */
 639 GLOBAL bool
 640 Conf_DisableServer( const char *Name )
 641 {
 642         int i;
 643
 644         assert( Name != NULL );
 645         for( i = 0; i < MAX_SERVERS; i++ ) {
 646                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 647                         /* Gotcha! Disable and disconnect server: */
 648                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 649                         if( Conf_Server[i].conn_id > NONE )
 650                                 Conn_Close(Conf_Server[i].conn_id, NULL,
 651                                            "Server link terminated on operator request",
 652                                            true);
 653                         return true;
 654                 }
 655         }
 656         return false;
 657 }
 658
 659 /**
 660  * Add a new remote server to our configuration.
 661  *
 662  * @param Name          Name of the new server.
 663  * @param Port          Port number to connect to or 0 for incoming connections.
 664  * @param Host          Host name to connect to.
 665  * @param MyPwd         Password that will be sent to the peer.
 666  * @param PeerPwd       Password that must be received from the peer.
 667  * @returns             true if the new server has been added; false otherwise.
 668  */
 669 GLOBAL bool
 670 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
 671                const char *MyPwd, const char *PeerPwd)
 672 {
 673         int i;
 674
 675         assert( Name != NULL );
 676         assert( Host != NULL );
 677         assert( MyPwd != NULL );
 678         assert( PeerPwd != NULL );
 679
 680         /* Search unused item in server configuration structure */
 681         for( i = 0; i < MAX_SERVERS; i++ ) {
 682                 /* Is this item used? */
 683                 if( ! Conf_Server[i].name[0] ) break;
 684         }
 685         if( i >= MAX_SERVERS ) return false;
 686
 687         Init_Server_Struct( &Conf_Server[i] );
 688         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 689         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 690         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 691         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 692         Conf_Server[i].port = Port;
 693         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 694
 695         return true;
 696 }
 697
 698 /**
 699  * Check if the given nickname is reserved for services on a particular server.
 700  *
 701  * @param ConfServer The server index to check.
 702  * @param Nick The nickname to check.
 703  * @returns true if the given nickname belongs to an "IRC service".
 704  */
 705 GLOBAL bool
 706 Conf_NickIsService(int ConfServer, const char *Nick)
 707 {
 708         assert (ConfServer >= 0);
 709         assert (ConfServer < MAX_SERVERS);
 710
 711         return MatchCaseInsensitiveList(Conf_Server[ConfServer].svs_mask,
 712                                         Nick, ",");
 713 }
 714
 715 /**
 716  * Check if the given nickname is blocked for "normal client" use.
 717  *
 718  * @param ConfServer The server index or NONE to check all configured servers.
 719  * @param Nick The nickname to check.
 720  * @returns true if the given nickname belongs to an "IRC service".
 721  */
 722 GLOBAL bool
 723 Conf_NickIsBlocked(const char *Nick)
 724 {
 725         int i;
 726
 727         for(i = 0; i < MAX_SERVERS; i++) {
 728                 if (!Conf_Server[i].name[0])
 729                         continue;
 730                 if (Conf_NickIsService(i, Nick))
 731                         return true;
 732         }
 733         return false;
 734 }
 735
 736 /**
 737  * Initialize configuration settings with their default values.
 738  */
 739 static void
 740 Set_Defaults(bool InitServers)
 741 {
 742         int i;
 743         char random[RANDOM_SALT_LEN + 1];
 744
 745         /* Global */
 746         strcpy(Conf_ServerName, "");
 747         strcpy(Conf_ServerAdmin1, "");
 748         strcpy(Conf_ServerAdmin2, "");
 749         strcpy(Conf_ServerAdminMail, "");
 750         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 751                  PACKAGE_NAME, PACKAGE_VERSION);
 752         strcpy(Conf_Network, "");
 753         free(Conf_ListenAddress);
 754         Conf_ListenAddress = NULL;
 755         array_free(&Conf_ListenPorts);
 756         array_free(&Conf_Motd);
 757         array_free(&Conf_Helptext);
 758         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 759         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 760         strlcpy(Conf_HelpFile, DOCDIR, sizeof(Conf_HelpFile));
 761         strlcat(Conf_HelpFile, HELP_FILE, sizeof(Conf_HelpFile));
 762         strcpy(Conf_ServerPwd, "");
 763         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 764         Conf_UID = Conf_GID = 0;
 765
 766         /* Limits */
 767         Conf_ConnectRetry = 60;
 768         Conf_IdleTimeout = 0;
 769         Conf_MaxConnections = 0;
 770         Conf_MaxConnectionsIP = 5;
 771         Conf_MaxJoins = 10;
 772         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 773         Conf_MaxListSize = 100;
 774         Conf_PingTimeout = 120;
 775         Conf_PongTimeout = 20;
 776
 777         /* Options */
 778         strlcpy(Conf_AllowedChannelTypes, CHANTYPES,
 779                 sizeof(Conf_AllowedChannelTypes));
 780         Conf_AllowRemoteOper = false;
 781 #ifndef STRICT_RFC
 782         Conf_AuthPing = false;
 783 #endif
 784         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 785         strcpy(Conf_CloakHost, "");
 786         strcpy(Conf_CloakHostModeX, "");
 787         strlcpy(Conf_CloakHostSalt, ngt_RandomStr(random, RANDOM_SALT_LEN),
 788                 sizeof(Conf_CloakHostSalt));
 789         Conf_CloakUserToNick = false;
 790         Conf_ConnectIPv4 = true;
 791 #ifdef WANT_IPV6
 792         Conf_ConnectIPv6 = true;
 793 #else
 794         Conf_ConnectIPv6 = false;
 795 #endif
 796         strcpy(Conf_DefaultUserModes, "");
 797         Conf_DNS = true;
 798 #ifdef IDENTAUTH
 799         Conf_Ident = true;
 800 #else
 801         Conf_Ident = false;
 802 #endif
 803         strcpy(Conf_IncludeDir, "");
 804         Conf_MorePrivacy = false;
 805         Conf_NoticeAuth = false;
 806         Conf_OperCanMode = false;
 807         Conf_OperChanPAutoOp = true;
 808         Conf_OperServerMode = false;
 809 #ifdef PAM
 810         Conf_PAM = true;
 811 #else
 812         Conf_PAM = false;
 813 #endif
 814         Conf_PAMIsOptional = false;
 815 #ifdef SYSLOG
 816         Conf_ScrubCTCP = false;
 817 #ifdef LOG_LOCAL5
 818         Conf_SyslogFacility = LOG_LOCAL5;
 819 #else
 820         Conf_SyslogFacility = 0;
 821 #endif
 822 #endif
 823
 824         /* Initialize server configuration structures */
 825         if (InitServers) {
 826                 for (i = 0; i < MAX_SERVERS;
 827                      Init_Server_Struct(&Conf_Server[i++]));
 828         }
 829 }
 830
 831 /**
 832  * Get number of configured listening ports.
 833  *
 834  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
 835  */
 836 static bool
 837 no_listenports(void)
 838 {
 839         size_t cnt = array_bytes(&Conf_ListenPorts);
 840 #ifdef SSL_SUPPORT
 841         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 842 #endif
 843         return cnt == 0;
 844 }
 845
 846 /**
 847  * Read contents of a text file into an array.
 848  *
 849  * This function is used to read the MOTD and help text file, for example.
 850  *
 851  * @param filename      Name of the file to read.
 852  * @return              true, when the file has been read in.
 853  */
 854 static bool
 855 Read_TextFile(const char *Filename, const char *Name, array *Destination)
 856 {
 857         char line[127];
 858         FILE *fp;
 859         int line_no = 1;
 860
 861         if (*Filename == '\0')
 862                 return false;
 863
 864         fp = fopen(Filename, "r");
 865         if (!fp) {
 866                 Config_Error(LOG_ERR, "Can't read %s file \"%s\": %s",
 867                              Name, Filename, strerror(errno));
 868                 return false;
 869         }
 870
 871         array_free(Destination);
 872         while (fgets(line, (int)sizeof line, fp)) {
 873                 ngt_TrimLastChr(line, '\n');
 874
 875                 /* add text including \0 */
 876                 if (!array_catb(Destination, line, strlen(line) + 1)) {
 877                         Log(LOG_ERR, "Cannot read/add \"%s\", line %d: %s",
 878                             Filename, line_no, strerror(errno));
 879                         break;
 880                 }
 881                 line_no++;
 882         }
 883         fclose(fp);
 884         return true;
 885 }
 886
 887 /**
 888  * Read ngIRCd configuration file.
 889  *
 890  * Please note that this function uses exit(1) on fatal errors and therefore
 891  * can result in ngIRCd terminating!
 892  *
 893  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
 894  * @returns                     true when the configuration file has been read
 895  *                              successfully; false otherwise.
 896  */
 897 static bool
 898 Read_Config(bool TestOnly, bool IsStarting)
 899 {
 900         const UINT16 defaultport = 6667;
 901         char *ptr, file[FNAME_LEN];
 902         struct dirent *entry;
 903         int i, n;
 904         FILE *fd;
 905         DIR *dh;
 906
 907         /* Open configuration file */
 908         fd = fopen( NGIRCd_ConfFile, "r" );
 909         if( ! fd ) {
 910                 /* No configuration file found! */
 911                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 912                                         NGIRCd_ConfFile, strerror( errno ));
 913                 if (!IsStarting)
 914                         return false;
 915                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 916                 exit( 1 );
 917         }
 918
 919         opers_free();
 920         Set_Defaults(IsStarting);
 921
 922         if (TestOnly)
 923                 Config_Error(LOG_INFO,
 924                              "Reading configuration from \"%s\" ...",
 925                              NGIRCd_ConfFile );
 926
 927         /* Clean up server configuration structure: mark all already
 928          * configured servers as "once" so that they are deleted
 929          * after the next disconnect and delete all unused servers.
 930          * And delete all servers which are "duplicates" of servers
 931          * that are already marked as "once" (such servers have been
 932          * created by the last rehash but are now useless). */
 933         for( i = 0; i < MAX_SERVERS; i++ ) {
 934                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 935                 else {
 936                         /* This structure is in use ... */
 937                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 938                                 /* Check for duplicates */
 939                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 940                                         if( n == i ) continue;
 941
 942                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 943                                                 Init_Server_Struct( &Conf_Server[n] );
 944 #ifdef DEBUG
 945                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
 946                                                                                                 n, i );
 947 #endif
 948                                         }
 949                                 }
 950                         } else {
 951                                 /* Mark server as "once" */
 952                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 953                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
 954                         }
 955                 }
 956         }
 957
 958         /* Initialize variables */
 959         Init_Server_Struct( &New_Server );
 960         New_Server_Idx = NONE;
 961 #ifdef SSL_SUPPORT
 962         ConfSSL_Init();
 963 #endif
 964
 965         Read_Config_File(NGIRCd_ConfFile, fd);
 966         fclose(fd);
 967
 968         if (Conf_IncludeDir[0]) {
 969                 dh = opendir(Conf_IncludeDir);
 970                 if (!dh)
 971                         Config_Error(LOG_ALERT,
 972                                      "Can't open include directory \"%s\": %s",
 973                                      Conf_IncludeDir, strerror(errno));
 974         } else {
 975                 strlcpy(Conf_IncludeDir, SYSCONFDIR, sizeof(Conf_IncludeDir));
 976                 strlcat(Conf_IncludeDir, CONFIG_DIR, sizeof(Conf_IncludeDir));
 977                 dh = opendir(Conf_IncludeDir);
 978         }
 979
 980         /* Include further configuration files, if IncludeDir is available */
 981         if (dh) {
 982                 while ((entry = readdir(dh)) != NULL) {
 983                         ptr = strrchr(entry->d_name, '.');
 984                         if (!ptr || strcasecmp(ptr, ".conf") != 0)
 985                                 continue;
 986                         snprintf(file, sizeof(file), "%s/%s",
 987                                  Conf_IncludeDir, entry->d_name);
 988                         if (TestOnly)
 989                                 Config_Error(LOG_INFO,
 990                                              "Reading configuration from \"%s\" ...",
 991                                              file);
 992                         fd = fopen(file, "r");
 993                         if (fd) {
 994                                 Read_Config_File(file, fd);
 995                                 fclose(fd);
 996                         } else
 997                                 Config_Error(LOG_ALERT,
 998                                              "Can't read configuration \"%s\": %s",
 999                                              file, strerror(errno));
1000                 }
1001                 closedir(dh);
1002         }
1003
1004         /* Check if there is still a server to add */
1005         if( New_Server.name[0] ) {
1006                 /* Copy data to "real" server structure */
1007                 assert( New_Server_Idx > NONE );
1008                 Conf_Server[New_Server_Idx] = New_Server;
1009         }
1010
1011         /* not a single listening port? Add default. */
1012         if (no_listenports() &&
1013                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
1014         {
1015                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
1016                                         (unsigned int) defaultport, strerror(errno));
1017
1018                 exit(1);
1019         }
1020
1021         if (!Conf_ListenAddress)
1022                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
1023
1024         if (!Conf_ListenAddress) {
1025                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1026                 exit(1);
1027         }
1028
1029         /* No MOTD phrase configured? (re)try motd file. */
1030         if (array_bytes(&Conf_Motd) == 0) {
1031                 if (Read_TextFile(Conf_MotdFile, "MOTD", &Conf_Motd))
1032                         Using_MotdFile = true;
1033         }
1034
1035         /* Try to read ngIRCd help text file. */
1036         (void)Read_TextFile(Conf_HelpFile, "help text", &Conf_Helptext);
1037         if (!array_bytes(&Conf_Helptext))
1038                 Config_Error(LOG_WARNING,
1039                     "No help text available, HELP command will be of limited use.");
1040
1041 #ifdef SSL_SUPPORT
1042         /* Make sure that all SSL-related files are readable */
1043         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1044         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1045         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1046
1047         /* Set the default ciphers if none were configured */
1048         if (!Conf_SSLOptions.CipherList)
1049                 Conf_SSLOptions.CipherList = strdup_warn(DEFAULT_CIPHERS);
1050 #endif
1051
1052         return true;
1053 }
1054
1055 /**
1056  * ...
1057  */
1058 static void Read_Config_File(const char *File, FILE *fd)
1059 {
1060         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
1061         int i, line = 0;
1062         size_t count;
1063
1064         /* Read configuration file */
1065         section[0] = '\0';
1066         while (true) {
1067                 if (!fgets(str, sizeof(str), fd))
1068                         break;
1069                 ngt_TrimStr(str);
1070                 line++;
1071
1072                 /* Skip comments and empty lines */
1073                 if (str[0] == ';' || str[0] == '#' || str[0] == '\0')
1074                         continue;
1075
1076                 if (strlen(str) >= sizeof(str) - 1) {
1077                         Config_Error(LOG_WARNING, "%s, line %d too long!",
1078                                      File, line);
1079                         continue;
1080                 }
1081
1082                 /* Is this the beginning of a new section? */
1083                 if ((str[0] == '[') && (str[strlen(str) - 1] == ']')) {
1084                         strlcpy(section, str, sizeof(section));
1085                         if (strcasecmp(section, "[GLOBAL]") == 0
1086                             || strcasecmp(section, "[LIMITS]") == 0
1087                             || strcasecmp(section, "[OPTIONS]") == 0
1088 #ifdef SSL_SUPPORT
1089                             || strcasecmp(section, "[SSL]") == 0
1090 #endif
1091                             )
1092                                 continue;
1093
1094                         if (strcasecmp(section, "[SERVER]") == 0) {
1095                                 /* Check if there is already a server to add */
1096                                 if (New_Server.name[0]) {
1097                                         /* Copy data to "real" server structure */
1098                                         assert(New_Server_Idx > NONE);
1099                                         Conf_Server[New_Server_Idx] =
1100                                         New_Server;
1101                                 }
1102
1103                                 /* Re-init structure for new server */
1104                                 Init_Server_Struct(&New_Server);
1105
1106                                 /* Search unused item in server configuration structure */
1107                                 for (i = 0; i < MAX_SERVERS; i++) {
1108                                         /* Is this item used? */
1109                                         if (!Conf_Server[i].name[0])
1110                                                 break;
1111                                 }
1112                                 if (i >= MAX_SERVERS) {
1113                                         /* Oops, no free item found! */
1114                                         Config_Error(LOG_ERR,
1115                                                      "Too many servers configured.");
1116                                         New_Server_Idx = NONE;
1117                                 } else
1118                                         New_Server_Idx = i;
1119                                 continue;
1120                         }
1121
1122                         if (strcasecmp(section, "[CHANNEL]") == 0) {
1123                                 count = array_length(&Conf_Channels,
1124                                                      sizeof(struct
1125                                                             Conf_Channel));
1126                                 if (!array_alloc
1127                                     (&Conf_Channels,
1128                                      sizeof(struct Conf_Channel), count)) {
1129                                             Config_Error(LOG_ERR,
1130                                                          "Could not allocate memory for new operator (line %d)",
1131                                                          line);
1132                                     }
1133                                 continue;
1134                         }
1135
1136                         if (strcasecmp(section, "[OPERATOR]") == 0) {
1137                                 count = array_length(&Conf_Opers,
1138                                                      sizeof(struct Conf_Oper));
1139                                 if (!array_alloc(&Conf_Opers,
1140                                                  sizeof(struct Conf_Oper),
1141                                                  count)) {
1142                                         Config_Error(LOG_ERR,
1143                                                      "Could not allocate memory for new channel (line &d)",
1144                                                      line);
1145                                 }
1146                                 continue;
1147                         }
1148
1149                         Config_Error(LOG_ERR,
1150                                      "%s, line %d: Unknown section \"%s\"!",
1151                                      File, line, section);
1152                         section[0] = 0x1;
1153                 }
1154                 if (section[0] == 0x1)
1155                         continue;
1156
1157                 /* Split line into variable name and parameters */
1158                 ptr = strchr(str, '=');
1159                 if (!ptr) {
1160                         Config_Error(LOG_ERR, "%s, line %d: Syntax error!",
1161                                      File, line);
1162                         continue;
1163                 }
1164                 *ptr = '\0';
1165                 var = str;
1166                 ngt_TrimStr(var);
1167                 arg = ptr + 1;
1168                 ngt_TrimStr(arg);
1169
1170                 if (strcasecmp(section, "[GLOBAL]") == 0)
1171                         Handle_GLOBAL(File, line, var, arg);
1172                 else if (strcasecmp(section, "[LIMITS]") == 0)
1173                         Handle_LIMITS(File, line, var, arg);
1174                 else if (strcasecmp(section, "[OPTIONS]") == 0)
1175                         Handle_OPTIONS(File, line, var, arg);
1176 #ifdef SSL_SUPPORT
1177                 else if (strcasecmp(section, "[SSL]") == 0)
1178                         Handle_SSL(File, line, var, arg);
1179 #endif
1180                 else if (strcasecmp(section, "[OPERATOR]") == 0)
1181                         Handle_OPERATOR(File, line, var, arg);
1182                 else if (strcasecmp(section, "[SERVER]") == 0)
1183                         Handle_SERVER(File, line, var, arg);
1184                 else if (strcasecmp(section, "[CHANNEL]") == 0)
1185                         Handle_CHANNEL(File, line, var, arg);
1186                 else
1187                         Config_Error(LOG_ERR,
1188                                      "%s, line %d: Variable \"%s\" outside section!",
1189                                      File, line, var);
1190         }
1191 }
1192
1193 /**
1194  * Check whether a string argument is "true" or "false".
1195  *
1196  * @param Arg   Input string.
1197  * @returns     true if the input string has been parsed as "yes", "true"
1198  *              (case insensitive) or a non-zero integer value.
1199  */
1200 static bool
1201 Check_ArgIsTrue(const char *Arg)
1202 {
1203         if (strcasecmp(Arg, "yes") == 0)
1204                 return true;
1205         if (strcasecmp(Arg, "true") == 0)
1206                 return true;
1207         if (atoi(Arg) != 0)
1208                 return true;
1209
1210         return false;
1211 }
1212
1213 /**
1214  * Handle setting of "MaxNickLength".
1215  *
1216  * @param Line  Line number in configuration file.
1217  * @raram Arg   Input string.
1218  * @returns     New configured maximum nickname length.
1219  */
1220 static unsigned int
1221 Handle_MaxNickLength(const char *File, int Line, const char *Arg)
1222 {
1223         unsigned new;
1224
1225         new = (unsigned) atoi(Arg) + 1;
1226         if (new > CLIENT_NICK_LEN) {
1227                 Config_Error(LOG_WARNING,
1228                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1229                              File, Line, CLIENT_NICK_LEN - 1);
1230                 return CLIENT_NICK_LEN;
1231         }
1232         if (new < 2) {
1233                 Config_Error(LOG_WARNING,
1234                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1235                              File, Line);
1236                 return 2;
1237         }
1238         return new;
1239 }
1240
1241 /**
1242  * Output a warning messages if IDENT is configured but not compiled in.
1243  */
1244 static void
1245 WarnIdent(const char UNUSED *File, int UNUSED Line)
1246 {
1247 #ifndef IDENTAUTH
1248         if (Conf_Ident) {
1249                 /* user has enabled ident lookups explicitly, but ... */
1250                 Config_Error(LOG_WARNING,
1251                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1252                         File, Line);
1253         }
1254 #endif
1255 }
1256
1257 /**
1258  * Output a warning messages if IPv6 is configured but not compiled in.
1259  */
1260 static void
1261 WarnIPv6(const char UNUSED *File, int UNUSED Line)
1262 {
1263 #ifndef WANT_IPV6
1264         if (Conf_ConnectIPv6) {
1265                 /* user has enabled IPv6 explicitly, but ... */
1266                 Config_Error(LOG_WARNING,
1267                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1268                         File, Line);
1269         }
1270 #endif
1271 }
1272
1273 /**
1274  * Output a warning messages if PAM is configured but not compiled in.
1275  */
1276 static void
1277 WarnPAM(const char UNUSED *File, int UNUSED Line)
1278 {
1279 #ifndef PAM
1280         if (Conf_PAM) {
1281                 Config_Error(LOG_WARNING,
1282                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1283                         File, Line);
1284         }
1285 #endif
1286 }
1287
1288 /**
1289  * Handle legacy "NoXXX" options in [GLOBAL] section.
1290  *
1291  * TODO: This function and support for "NoXXX" could be removed starting
1292  * with ngIRCd release 19 (one release after marking it "deprecated").
1293  *
1294  * @param Var   Variable name.
1295  * @param Arg   Argument string.
1296  * @returns     true if a NoXXX option has been processed; false otherwise.
1297  */
1298 static bool
1299 CheckLegacyNoOption(const char *Var, const char *Arg)
1300 {
1301         if(strcasecmp(Var, "NoDNS") == 0) {
1302                 Conf_DNS = !Check_ArgIsTrue( Arg );
1303                 return true;
1304         }
1305         if (strcasecmp(Var, "NoIdent") == 0) {
1306                 Conf_Ident = !Check_ArgIsTrue(Arg);
1307                 return true;
1308         }
1309         if(strcasecmp(Var, "NoPAM") == 0) {
1310                 Conf_PAM = !Check_ArgIsTrue(Arg);
1311                 return true;
1312         }
1313         return false;
1314 }
1315
1316 /**
1317  * Handle deprecated legacy options in [GLOBAL] section.
1318  *
1319  * TODO: This function and support for these options in the [Global] section
1320  * could be removed starting with ngIRCd release 19 (one release after
1321  * marking it "deprecated").
1322  *
1323  * @param Var   Variable name.
1324  * @param Arg   Argument string.
1325  * @returns     true if a legacy option has been processed; false otherwise.
1326  */
1327 static const char*
1328 CheckLegacyGlobalOption(const char *File, int Line, char *Var, char *Arg)
1329 {
1330         if (strcasecmp(Var, "AllowRemoteOper") == 0
1331             || strcasecmp(Var, "ChrootDir") == 0
1332             || strcasecmp(Var, "ConnectIPv4") == 0
1333             || strcasecmp(Var, "ConnectIPv6") == 0
1334             || strcasecmp(Var, "OperCanUseMode") == 0
1335             || strcasecmp(Var, "OperChanPAutoOp") == 0
1336             || strcasecmp(Var, "OperServerMode") == 0
1337             || strcasecmp(Var, "PredefChannelsOnly") == 0
1338             || strcasecmp(Var, "SyslogFacility") == 0
1339             || strcasecmp(Var, "WebircPassword") == 0) {
1340                 Handle_OPTIONS(File, Line, Var, Arg);
1341                 return "[Options]";
1342         }
1343         if (strcasecmp(Var, "ConnectRetry") == 0
1344             || strcasecmp(Var, "IdleTimeout") == 0
1345             || strcasecmp(Var, "MaxConnections") == 0
1346             || strcasecmp(Var, "MaxConnectionsIP") == 0
1347             || strcasecmp(Var, "MaxJoins") == 0
1348             || strcasecmp(Var, "MaxNickLength") == 0
1349             || strcasecmp(Var, "PingTimeout") == 0
1350             || strcasecmp(Var, "PongTimeout") == 0) {
1351                 Handle_LIMITS(File, Line, Var, Arg);
1352                 return "[Limits]";
1353         }
1354 #ifdef SSL_SUPPORT
1355         if (strcasecmp(Var, "SSLCertFile") == 0
1356             || strcasecmp(Var, "SSLDHFile") == 0
1357             || strcasecmp(Var, "SSLKeyFile") == 0
1358             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1359             || strcasecmp(Var, "SSLPorts") == 0) {
1360                 Handle_SSL(File, Line, Var + 3, Arg);
1361                 return "[SSL]";
1362         }
1363 #endif
1364
1365         return NULL;
1366 }
1367
1368 /**
1369  * Strip "no" prefix of a string.
1370  *
1371  * TODO: This function and support for "NoXXX" should be removed starting
1372  * with ngIRCd release 19! (One release after marking it "deprecated").
1373  *
1374  * @param str   Pointer to input string starting with "no".
1375  * @returns     New pointer to string without "no" prefix.
1376  */
1377 static const char *
1378 NoNo(const char *str)
1379 {
1380         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1381         return str + 2;
1382 }
1383
1384 /**
1385  * Invert "boolean" string.
1386  *
1387  * TODO: This function and support for "NoXXX" should be removed starting
1388  * with ngIRCd release 19! (One release after marking it "deprecated").
1389  *
1390  * @param arg   "Boolean" input string.
1391  * @returns     Pointer to inverted "boolean string".
1392  */
1393 static const char *
1394 InvertArg(const char *arg)
1395 {
1396         return yesno_to_str(!Check_ArgIsTrue(arg));
1397 }
1398
1399 /**
1400  * Handle variable in [Global] configuration section.
1401  *
1402  * @param Line  Line numer in configuration file.
1403  * @param Var   Variable name.
1404  * @param Arg   Variable argument.
1405  */
1406 static void
1407 Handle_GLOBAL(const char *File, int Line, char *Var, char *Arg )
1408 {
1409         struct passwd *pwd;
1410         struct group *grp;
1411         size_t len;
1412         const char *section;
1413         char *ptr;
1414
1415         assert(File != NULL);
1416         assert(Line > 0);
1417         assert(Var != NULL);
1418         assert(Arg != NULL);
1419
1420         if (strcasecmp(Var, "Name") == 0) {
1421                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1422                 if (len >= sizeof(Conf_ServerName))
1423                         Config_Error_TooLong(File, Line, Var);
1424                 return;
1425         }
1426         if (strcasecmp(Var, "AdminInfo1") == 0) {
1427                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1428                 if (len >= sizeof(Conf_ServerAdmin1))
1429                         Config_Error_TooLong(File, Line, Var);
1430                 return;
1431         }
1432         if (strcasecmp(Var, "AdminInfo2") == 0) {
1433                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1434                 if (len >= sizeof(Conf_ServerAdmin2))
1435                         Config_Error_TooLong(File, Line, Var);
1436                 return;
1437         }
1438         if (strcasecmp(Var, "AdminEMail") == 0) {
1439                 len = strlcpy(Conf_ServerAdminMail, Arg,
1440                         sizeof(Conf_ServerAdminMail));
1441                 if (len >= sizeof(Conf_ServerAdminMail))
1442                         Config_Error_TooLong(File, Line, Var);
1443                 return;
1444         }
1445         if (strcasecmp(Var, "Info") == 0) {
1446                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1447                 if (len >= sizeof(Conf_ServerInfo))
1448                         Config_Error_TooLong(File, Line, Var);
1449                 return;
1450         }
1451         if (strcasecmp(Var, "HelpFile") == 0) {
1452                 len = strlcpy(Conf_HelpFile, Arg, sizeof(Conf_HelpFile));
1453                 if (len >= sizeof(Conf_HelpFile))
1454                         Config_Error_TooLong(File, Line, Var);
1455                 return;
1456         }
1457         if (strcasecmp(Var, "Listen") == 0) {
1458                 if (Conf_ListenAddress) {
1459                         Config_Error(LOG_ERR,
1460                                      "Multiple Listen= options, ignoring: %s",
1461                                      Arg);
1462                         return;
1463                 }
1464                 Conf_ListenAddress = strdup_warn(Arg);
1465                 /* If allocation fails, we're in trouble: we cannot ignore the
1466                  * error -- otherwise ngircd would listen on all interfaces. */
1467                 if (!Conf_ListenAddress) {
1468                         Config_Error(LOG_ALERT,
1469                                      "%s exiting due to fatal errors!",
1470                                      PACKAGE_NAME);
1471                         exit(1);
1472                 }
1473                 return;
1474         }
1475         if (strcasecmp(Var, "MotdFile") == 0) {
1476                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1477                 if (len >= sizeof(Conf_MotdFile))
1478                         Config_Error_TooLong(File, Line, Var);
1479                 return;
1480         }
1481         if (strcasecmp(Var, "MotdPhrase") == 0) {
1482                 len = strlen(Arg);
1483                 if (len == 0)
1484                         return;
1485                 if (len >= 127) {
1486                         Config_Error_TooLong(File, Line, Var);
1487                         return;
1488                 }
1489                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1490                         Config_Error(LOG_WARNING,
1491                                      "%s, line %d: Could not append MotdPhrase: %s",
1492                                      File, Line, strerror(errno));
1493                 Using_MotdFile = false;
1494                 return;
1495         }
1496         if (strcasecmp(Var, "Network") == 0) {
1497                 len = strlcpy(Conf_Network, Arg, sizeof(Conf_Network));
1498                 if (len >= sizeof(Conf_Network))
1499                         Config_Error_TooLong(File, Line, Var);
1500                 ptr = strchr(Conf_Network, ' ');
1501                 if (ptr) {
1502                         Config_Error(LOG_WARNING,
1503                                      "%s, line %d: \"Network\" can't contain spaces!",
1504                                      File, Line);
1505                         *ptr = '\0';
1506                 }
1507                 return;
1508         }
1509         if(strcasecmp(Var, "Password") == 0) {
1510                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1511                 if (len >= sizeof(Conf_ServerPwd))
1512                         Config_Error_TooLong(File, Line, Var);
1513                 return;
1514         }
1515         if (strcasecmp(Var, "PidFile") == 0) {
1516                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1517                 if (len >= sizeof(Conf_PidFile))
1518                         Config_Error_TooLong(File, Line, Var);
1519                 return;
1520         }
1521         if (strcasecmp(Var, "Ports") == 0) {
1522                 ports_parse(&Conf_ListenPorts, File, Line, Arg);
1523                 return;
1524         }
1525         if (strcasecmp(Var, "ServerGID") == 0) {
1526                 grp = getgrnam(Arg);
1527                 if (grp)
1528                         Conf_GID = grp->gr_gid;
1529                 else {
1530                         Conf_GID = (unsigned int)atoi(Arg);
1531                         if (!Conf_GID && strcmp(Arg, "0"))
1532                                 Config_Error(LOG_WARNING,
1533                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1534                                              File, Line, Var);
1535                 }
1536                 return;
1537         }
1538         if (strcasecmp(Var, "ServerUID") == 0) {
1539                 pwd = getpwnam(Arg);
1540                 if (pwd)
1541                         Conf_UID = pwd->pw_uid;
1542                 else {
1543                         Conf_UID = (unsigned int)atoi(Arg);
1544                         if (!Conf_UID && strcmp(Arg, "0"))
1545                                 Config_Error(LOG_WARNING,
1546                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1547                                              File, Line, Var);
1548                 }
1549                 return;
1550         }
1551
1552         if (CheckLegacyNoOption(Var, Arg)) {
1553                 /* TODO: This function and support for "NoXXX" could be
1554                  * be removed starting with ngIRCd release 19 (one release
1555                  * after marking it "deprecated"). */
1556                 Config_Error(LOG_WARNING,
1557                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1558                              File, Line, NoNo(Var), InvertArg(Arg));
1559                 if (strcasecmp(Var, "NoIdent") == 0)
1560                         WarnIdent(File, Line);
1561                 else if (strcasecmp(Var, "NoPam") == 0)
1562                         WarnPAM(File, Line);
1563                 return;
1564         }
1565         if ((section = CheckLegacyGlobalOption(File, Line, Var, Arg))) {
1566                 /** TODO: This function and support for these options in the
1567                  * [Global] section could be removed starting with ngIRCd
1568                  * release 19 (one release after marking it "deprecated"). */
1569                 if (strncasecmp(Var, "SSL", 3) == 0) {
1570                         Config_Error(LOG_WARNING,
1571                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1572                                      File, Line, Var, section,
1573                                      Var + 3);
1574                 } else {
1575                         Config_Error(LOG_WARNING,
1576                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1577                                      File, Line, Var, section);
1578                 }
1579                 return;
1580         }
1581
1582         Config_Error_Section(File, Line, Var, "Global");
1583 }
1584
1585 /**
1586  * Handle variable in [Limits] configuration section.
1587  *
1588  * @param Line  Line numer in configuration file.
1589  * @param Var   Variable name.
1590  * @param Arg   Variable argument.
1591  */
1592 static void
1593 Handle_LIMITS(const char *File, int Line, char *Var, char *Arg)
1594 {
1595         assert(File != NULL);
1596         assert(Line > 0);
1597         assert(Var != NULL);
1598         assert(Arg != NULL);
1599
1600         if (strcasecmp(Var, "ConnectRetry") == 0) {
1601                 Conf_ConnectRetry = atoi(Arg);
1602                 if (Conf_ConnectRetry < 5) {
1603                         Config_Error(LOG_WARNING,
1604                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1605                                      File, Line);
1606                         Conf_ConnectRetry = 5;
1607                 }
1608                 return;
1609         }
1610         if (strcasecmp(Var, "IdleTimeout") == 0) {
1611                 Conf_IdleTimeout = atoi(Arg);
1612                 if (!Conf_IdleTimeout && strcmp(Arg, "0"))
1613                         Config_Error_NaN(File, Line, Var);
1614                 return;
1615         }
1616         if (strcasecmp(Var, "MaxConnections") == 0) {
1617                 Conf_MaxConnections = atoi(Arg);
1618                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1619                         Config_Error_NaN(File, Line, Var);
1620                 return;
1621         }
1622         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1623                 Conf_MaxConnectionsIP = atoi(Arg);
1624                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1625                         Config_Error_NaN(File, Line, Var);
1626                 return;
1627         }
1628         if (strcasecmp(Var, "MaxJoins") == 0) {
1629                 Conf_MaxJoins = atoi(Arg);
1630                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1631                         Config_Error_NaN(File, Line, Var);
1632                 return;
1633         }
1634         if (strcasecmp(Var, "MaxNickLength") == 0) {
1635                 Conf_MaxNickLength = Handle_MaxNickLength(File, Line, Arg);
1636                 return;
1637         }
1638         if (strcasecmp(Var, "MaxListSize") == 0) {
1639                 Conf_MaxListSize = atoi(Arg);
1640                 if (!Conf_MaxListSize && strcmp(Arg, "0"))
1641                         Config_Error_NaN(File, Line, Var);
1642                 return;
1643         }
1644         if (strcasecmp(Var, "PingTimeout") == 0) {
1645                 Conf_PingTimeout = atoi(Arg);
1646                 if (Conf_PingTimeout < 5) {
1647                         Config_Error(LOG_WARNING,
1648                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1649                                      File, Line);
1650                         Conf_PingTimeout = 5;
1651                 }
1652                 return;
1653         }
1654         if (strcasecmp(Var, "PongTimeout") == 0) {
1655                 Conf_PongTimeout = atoi(Arg);
1656                 if (Conf_PongTimeout < 5) {
1657                         Config_Error(LOG_WARNING,
1658                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1659                                      File, Line);
1660                         Conf_PongTimeout = 5;
1661                 }
1662                 return;
1663         }
1664
1665         Config_Error_Section(File, Line, Var, "Limits");
1666 }
1667
1668 /**
1669  * Handle variable in [Options] configuration section.
1670  *
1671  * @param Line  Line numer in configuration file.
1672  * @param Var   Variable name.
1673  * @param Arg   Variable argument.
1674  */
1675 static void
1676 Handle_OPTIONS(const char *File, int Line, char *Var, char *Arg)
1677 {
1678         size_t len;
1679         char *p;
1680
1681         assert(File != NULL);
1682         assert(Line > 0);
1683         assert(Var != NULL);
1684         assert(Arg != NULL);
1685
1686         if (strcasecmp(Var, "AllowedChannelTypes") == 0) {
1687                 p = Arg;
1688                 Conf_AllowedChannelTypes[0] = '\0';
1689                 while (*p) {
1690                         if (strchr(Conf_AllowedChannelTypes, *p)) {
1691                                 /* Prefix is already included; ignore it */
1692                                 p++;
1693                                 continue;
1694                         }
1695
1696                         if (strchr(CHANTYPES, *p)) {
1697                                 len = strlen(Conf_AllowedChannelTypes) + 1;
1698                                 assert(len < sizeof(Conf_AllowedChannelTypes));
1699                                 Conf_AllowedChannelTypes[len - 1] = *p;
1700                                 Conf_AllowedChannelTypes[len] = '\0';
1701                         } else {
1702                                 Config_Error(LOG_WARNING,
1703                                              "%s, line %d: Unknown channel prefix \"%c\" in \"AllowedChannelTypes\"!",
1704                                              File, Line, *p);
1705                         }
1706                         p++;
1707                 }
1708                 return;
1709         }
1710         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1711                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1712                 return;
1713         }
1714         if (strcasecmp(Var, "ChrootDir") == 0) {
1715                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1716                 if (len >= sizeof(Conf_Chroot))
1717                         Config_Error_TooLong(File, Line, Var);
1718                 return;
1719         }
1720         if (strcasecmp(Var, "CloakHost") == 0) {
1721                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1722                 if (len >= sizeof(Conf_CloakHost))
1723                         Config_Error_TooLong(File, Line, Var);
1724                 return;
1725         }
1726         if (strcasecmp(Var, "CloakHostModeX") == 0) {
1727                 len = strlcpy(Conf_CloakHostModeX, Arg, sizeof(Conf_CloakHostModeX));
1728                 if (len >= sizeof(Conf_CloakHostModeX))
1729                         Config_Error_TooLong(File, Line, Var);
1730                 return;
1731         }
1732         if (strcasecmp(Var, "CloakHostSalt") == 0) {
1733                 len = strlcpy(Conf_CloakHostSalt, Arg, sizeof(Conf_CloakHostSalt));
1734                 if (len >= sizeof(Conf_CloakHostSalt))
1735                         Config_Error_TooLong(File, Line, Var);
1736                 return;
1737         }
1738         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1739                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1740                 return;
1741         }
1742         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1743                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1744                 WarnIPv6(File, Line);
1745                 return;
1746         }
1747         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1748                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1749                 return;
1750         }
1751         if (strcasecmp(Var, "DefaultUserModes") == 0) {
1752                 p = Arg;
1753                 Conf_DefaultUserModes[0] = '\0';
1754                 while (*p) {
1755                         if (strchr(Conf_DefaultUserModes, *p)) {
1756                                 /* Mode is already included; ignore it */
1757                                 p++;
1758                                 continue;
1759                         }
1760
1761                         if (strchr(USERMODES, *p)) {
1762                                 len = strlen(Conf_DefaultUserModes) + 1;
1763                                 assert(len < sizeof(Conf_DefaultUserModes));
1764                                 Conf_DefaultUserModes[len - 1] = *p;
1765                                 Conf_DefaultUserModes[len] = '\0';
1766                         } else {
1767                                 Config_Error(LOG_WARNING,
1768                                              "%s, line %d: Unknown user mode \"%c\" in \"DefaultUserModes\"!",
1769                                              File, Line, *p);
1770                         }
1771                         p++;
1772                 }
1773                 return;
1774         }
1775         if (strcasecmp(Var, "DNS") == 0) {
1776                 Conf_DNS = Check_ArgIsTrue(Arg);
1777                 return;
1778         }
1779         if (strcasecmp(Var, "Ident") == 0) {
1780                 Conf_Ident = Check_ArgIsTrue(Arg);
1781                 WarnIdent(File, Line);
1782                 return;
1783         }
1784         if (strcasecmp(Var, "IncludeDir") == 0) {
1785                 if (Conf_IncludeDir[0]) {
1786                         Config_Error(LOG_ERR,
1787                                      "%s, line %d: Can't overwrite value of \"IncludeDir\" variable!",
1788                                      File, Line);
1789                         return;
1790                 }
1791                 len = strlcpy(Conf_IncludeDir, Arg, sizeof(Conf_IncludeDir));
1792                 if (len >= sizeof(Conf_IncludeDir))
1793                         Config_Error_TooLong(File, Line, Var);
1794                 return;
1795         }
1796         if (strcasecmp(Var, "MorePrivacy") == 0) {
1797                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1798                 return;
1799         }
1800         if (strcasecmp(Var, "NoticeAuth") == 0) {
1801                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1802                 return;
1803         }
1804         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1805                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1806                 return;
1807         }
1808         if (strcasecmp(Var, "OperChanPAutoOp") == 0) {
1809                 Conf_OperChanPAutoOp = Check_ArgIsTrue(Arg);
1810                 return;
1811         }
1812         if (strcasecmp(Var, "OperServerMode") == 0) {
1813                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1814                 return;
1815         }
1816         if (strcasecmp(Var, "PAM") == 0) {
1817                 Conf_PAM = Check_ArgIsTrue(Arg);
1818                 WarnPAM(File, Line);
1819                 return;
1820         }
1821         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1822                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1823                 return;
1824         }
1825         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1826                 /*
1827                  * TODO: This section and support for "PredefChannelsOnly"
1828                  * could be removed starting with ngIRCd release 22 (one
1829                  * release after marking it "deprecated") ...
1830                  */
1831                 Config_Error(LOG_WARNING,
1832                              "%s, line %d (section \"Options\"): \"%s\" is deprecated, please use \"AllowedChannelTypes\"!",
1833                              File, Line, Var);
1834                 if (Check_ArgIsTrue(Arg))
1835                         Conf_AllowedChannelTypes[0] = '\0';
1836                 else
1837                         strlcpy(Conf_AllowedChannelTypes, CHANTYPES,
1838                                 sizeof(Conf_AllowedChannelTypes));
1839                 return;
1840         }
1841 #ifndef STRICT_RFC
1842         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1843                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1844                 return;
1845         }
1846 #endif
1847         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1848                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1849                 return;
1850         }
1851 #ifdef SYSLOG
1852         if (strcasecmp(Var, "SyslogFacility") == 0) {
1853                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1854                                                            Conf_SyslogFacility);
1855                 return;
1856         }
1857 #endif
1858         if (strcasecmp(Var, "WebircPassword") == 0) {
1859                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1860                 if (len >= sizeof(Conf_WebircPwd))
1861                         Config_Error_TooLong(File, Line, Var);
1862                 return;
1863         }
1864
1865         Config_Error_Section(File, Line, Var, "Options");
1866 }
1867
1868 #ifdef SSL_SUPPORT
1869
1870 /**
1871  * Handle variable in [SSL] configuration section.
1872  *
1873  * @param Line  Line numer in configuration file.
1874  * @param Var   Variable name.
1875  * @param Arg   Variable argument.
1876  */
1877 static void
1878 Handle_SSL(const char *File, int Line, char *Var, char *Arg)
1879 {
1880         assert(File != NULL);
1881         assert(Line > 0);
1882         assert(Var != NULL);
1883         assert(Arg != NULL);
1884
1885         if (strcasecmp(Var, "CertFile") == 0) {
1886                 assert(Conf_SSLOptions.CertFile == NULL);
1887                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1888                 return;
1889         }
1890         if (strcasecmp(Var, "DHFile") == 0) {
1891                 assert(Conf_SSLOptions.DHFile == NULL);
1892                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1893                 return;
1894         }
1895         if (strcasecmp(Var, "KeyFile") == 0) {
1896                 assert(Conf_SSLOptions.KeyFile == NULL);
1897                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1898                 return;
1899         }
1900         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1901                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1902                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1903                         Config_Error(LOG_ERR,
1904                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1905                                      File, Line, Var, strerror(errno));
1906                 return;
1907         }
1908         if (strcasecmp(Var, "Ports") == 0) {
1909                 ports_parse(&Conf_SSLOptions.ListenPorts, File, Line, Arg);
1910                 return;
1911         }
1912         if (strcasecmp(Var, "CipherList") == 0) {
1913                 assert(Conf_SSLOptions.CipherList == NULL);
1914                 Conf_SSLOptions.CipherList = strdup_warn(Arg);
1915                 return;
1916         }
1917
1918         Config_Error_Section(File, Line, Var, "SSL");
1919 }
1920
1921 #endif
1922
1923 /**
1924  * Handle variable in [Operator] configuration section.
1925  *
1926  * @param Line  Line numer in configuration file.
1927  * @param Var   Variable name.
1928  * @param Arg   Variable argument.
1929  */
1930 static void
1931 Handle_OPERATOR(const char *File, int Line, char *Var, char *Arg )
1932 {
1933         size_t len;
1934         struct Conf_Oper *op;
1935
1936         assert( File != NULL );
1937         assert( Line > 0 );
1938         assert( Var != NULL );
1939         assert( Arg != NULL );
1940
1941         op = array_get(&Conf_Opers, sizeof(*op),
1942                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1943         if (!op)
1944                 return;
1945
1946         if (strcasecmp(Var, "Name") == 0) {
1947                 /* Name of IRC operator */
1948                 len = strlcpy(op->name, Arg, sizeof(op->name));
1949                 if (len >= sizeof(op->name))
1950                                 Config_Error_TooLong(File, Line, Var);
1951                 return;
1952         }
1953         if (strcasecmp(Var, "Password") == 0) {
1954                 /* Password of IRC operator */
1955                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1956                 if (len >= sizeof(op->pwd))
1957                                 Config_Error_TooLong(File, Line, Var);
1958                 return;
1959         }
1960         if (strcasecmp(Var, "Mask") == 0) {
1961                 if (op->mask)
1962                         return; /* Hostname already configured */
1963                 op->mask = strdup_warn( Arg );
1964                 return;
1965         }
1966
1967         Config_Error_Section(File, Line, Var, "Operator");
1968 }
1969
1970 /**
1971  * Handle variable in [Server] configuration section.
1972  *
1973  * @param Line  Line numer in configuration file.
1974  * @param Var   Variable name.
1975  * @param Arg   Variable argument.
1976  */
1977 static void
1978 Handle_SERVER(const char *File, int Line, char *Var, char *Arg )
1979 {
1980         long port;
1981         size_t len;
1982
1983         assert( File != NULL );
1984         assert( Line > 0 );
1985         assert( Var != NULL );
1986         assert( Arg != NULL );
1987
1988         /* Ignore server block if no space is left in server configuration structure */
1989         if( New_Server_Idx <= NONE ) return;
1990
1991         if( strcasecmp( Var, "Host" ) == 0 ) {
1992                 /* Hostname of the server */
1993                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1994                 if (len >= sizeof( New_Server.host ))
1995                         Config_Error_TooLong(File, Line, Var);
1996                 return;
1997         }
1998         if( strcasecmp( Var, "Name" ) == 0 ) {
1999                 /* Name of the server ("Nick"/"ID") */
2000                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
2001                 if (len >= sizeof( New_Server.name ))
2002                         Config_Error_TooLong(File, Line, Var);
2003                 return;
2004         }
2005         if (strcasecmp(Var, "Bind") == 0) {
2006                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
2007                         return;
2008
2009                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
2010                              File, Line, Arg);
2011                 return;
2012         }
2013         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
2014                 /* Password of this server which is sent to the peer */
2015                 if (*Arg == ':') {
2016                         Config_Error(LOG_ERR,
2017                                      "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
2018                                      File, Line);
2019                 }
2020                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
2021                 if (len >= sizeof( New_Server.pwd_in ))
2022                         Config_Error_TooLong(File, Line, Var);
2023                 return;
2024         }
2025         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
2026                 /* Passwort of the peer which must be received */
2027                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
2028                 if (len >= sizeof( New_Server.pwd_out ))
2029                         Config_Error_TooLong(File, Line, Var);
2030                 return;
2031         }
2032         if( strcasecmp( Var, "Port" ) == 0 ) {
2033                 /* Port to which this server should connect */
2034                 port = atol( Arg );
2035                 if (port >= 0 && port < 0xFFFF)
2036                         New_Server.port = (UINT16)port;
2037                 else
2038                         Config_Error(LOG_ERR,
2039                                      "%s, line %d (section \"Server\"): Illegal port number %ld!",
2040                                      File, Line, port );
2041                 return;
2042         }
2043 #ifdef SSL_SUPPORT
2044         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
2045                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
2046                 return;
2047         }
2048 #endif
2049         if( strcasecmp( Var, "Group" ) == 0 ) {
2050                 /* Server group */
2051                 New_Server.group = atoi( Arg );
2052                 if (!New_Server.group && strcmp(Arg, "0"))
2053                         Config_Error_NaN(File, Line, Var);
2054                 return;
2055         }
2056         if( strcasecmp( Var, "Passive" ) == 0 ) {
2057                 if (Check_ArgIsTrue(Arg))
2058                         New_Server.flags |= CONF_SFLAG_DISABLED;
2059                 return;
2060         }
2061         if (strcasecmp(Var, "ServiceMask") == 0) {
2062                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
2063                               sizeof(New_Server.svs_mask));
2064                 if (len >= sizeof(New_Server.svs_mask))
2065                         Config_Error_TooLong(File, Line, Var);
2066                 return;
2067         }
2068
2069         Config_Error_Section(File, Line, Var, "Server");
2070 }
2071
2072 /**
2073  * Copy channel name into channel structure.
2074  *
2075  * If the channel name is not valid because of a missing prefix ('#', '&'),
2076  * a default prefix of '#' will be added.
2077  *
2078  * @param new_chan      New already allocated channel structure.
2079  * @param name          Name of the new channel.
2080  * @returns             true on success, false otherwise.
2081  */
2082 static bool
2083 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
2084 {
2085         size_t size = sizeof(new_chan->name);
2086         char *dest = new_chan->name;
2087
2088         if (!Channel_IsValidName(name)) {
2089                 /*
2090                  * maybe user forgot to add a '#'.
2091                  * This is only here for user convenience.
2092                  */
2093                 *dest = '#';
2094                 --size;
2095                 ++dest;
2096         }
2097         return size > strlcpy(dest, name, size);
2098 }
2099
2100 /**
2101  * Handle variable in [Channel] configuration section.
2102  *
2103  * @param Line  Line numer in configuration file.
2104  * @param Var   Variable name.
2105  * @param Arg   Variable argument.
2106  */
2107 static void
2108 Handle_CHANNEL(const char *File, int Line, char *Var, char *Arg)
2109 {
2110         size_t len;
2111         struct Conf_Channel *chan;
2112
2113         assert( File != NULL );
2114         assert( Line > 0 );
2115         assert( Var != NULL );
2116         assert( Arg != NULL );
2117
2118         chan = array_get(&Conf_Channels, sizeof(*chan),
2119                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
2120         if (!chan)
2121                 return;
2122
2123         if (strcasecmp(Var, "Name") == 0) {
2124                 if (!Handle_Channelname(chan, Arg))
2125                         Config_Error_TooLong(File, Line, Var);
2126                 return;
2127         }
2128         if (strcasecmp(Var, "Modes") == 0) {
2129                 /* Initial modes */
2130                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
2131                 if (len >= sizeof(chan->modes))
2132                         Config_Error_TooLong(File, Line, Var);
2133                 return;
2134         }
2135         if( strcasecmp( Var, "Topic" ) == 0 ) {
2136                 /* Initial topic */
2137                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
2138                 if (len >= sizeof(chan->topic))
2139                         Config_Error_TooLong(File, Line, Var);
2140                 return;
2141         }
2142         if( strcasecmp( Var, "Key" ) == 0 ) {
2143                 /* Initial Channel Key (mode k) */
2144                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
2145                 if (len >= sizeof(chan->key))
2146                         Config_Error_TooLong(File, Line, Var);
2147                 return;
2148         }
2149         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
2150                 /* maximum user limit, mode l */
2151                 chan->maxusers = (unsigned long) atol(Arg);
2152                 if (!chan->maxusers && strcmp(Arg, "0"))
2153                         Config_Error_NaN(File, Line, Var);
2154                 return;
2155         }
2156         if (strcasecmp(Var, "KeyFile") == 0) {
2157                 /* channel keys */
2158                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
2159                 if (len >= sizeof(chan->keyfile))
2160                         Config_Error_TooLong(File, Line, Var);
2161                 return;
2162         }
2163
2164         Config_Error_Section(File, Line, Var, "Channel");
2165 }
2166
2167 /**
2168  * Validate server configuration.
2169  *
2170  * Please note that this function uses exit(1) on fatal errors and therefore
2171  * can result in ngIRCd terminating!
2172  *
2173  * @param Configtest    true if the daemon has been called with "--configtest".
2174  * @param Rehash        true if re-reading configuration on runtime.
2175  * @returns             true if configuration is valid.
2176  */
2177 static bool
2178 Validate_Config(bool Configtest, bool Rehash)
2179 {
2180         /* Validate configuration settings. */
2181
2182 #ifdef DEBUG
2183         int i, servers, servers_once;
2184 #endif
2185         bool config_valid = true;
2186         char *ptr;
2187
2188         /* Emit a warning when the config file is not a full path name */
2189         if (NGIRCd_ConfFile[0] && NGIRCd_ConfFile[0] != '/') {
2190                 Config_Error(LOG_WARNING,
2191                         "Not specifying a full path name to \"%s\" can cause problems when rehashing the server!",
2192                         NGIRCd_ConfFile);
2193         }
2194
2195         /* Validate configured server name, see RFC 2812 section 2.3.1 */
2196         ptr = Conf_ServerName;
2197         do {
2198                 if (*ptr >= 'a' && *ptr <= 'z') continue;
2199                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
2200                 if (*ptr >= '0' && *ptr <= '9') continue;
2201                 if (ptr > Conf_ServerName) {
2202                         if (*ptr == '.' || *ptr == '-')
2203                                 continue;
2204                 }
2205                 Conf_ServerName[0] = '\0';
2206                 break;
2207         } while (*(++ptr));
2208
2209         if (!Conf_ServerName[0]) {
2210                 /* No server name configured! */
2211                 config_valid = false;
2212                 Config_Error(LOG_ALERT,
2213                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
2214                              NGIRCd_ConfFile);
2215                 if (!Configtest && !Rehash) {
2216                         Config_Error(LOG_ALERT,
2217                                      "%s exiting due to fatal errors!",
2218                                      PACKAGE_NAME);
2219                         exit(1);
2220                 }
2221         }
2222
2223         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
2224                 /* No dot in server name! */
2225                 config_valid = false;
2226                 Config_Error(LOG_ALERT,
2227                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
2228                              NGIRCd_ConfFile);
2229                 if (!Configtest) {
2230                         Config_Error(LOG_ALERT,
2231                                      "%s exiting due to fatal errors!",
2232                                      PACKAGE_NAME);
2233                         exit(1);
2234                 }
2235         }
2236
2237 #ifdef STRICT_RFC
2238         if (!Conf_ServerAdminMail[0]) {
2239                 /* No administrative contact configured! */
2240                 config_valid = false;
2241                 Config_Error(LOG_ALERT,
2242                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
2243                              NGIRCd_ConfFile);
2244                 if (!Configtest) {
2245                         Config_Error(LOG_ALERT,
2246                                      "%s exiting due to fatal errors!",
2247                                      PACKAGE_NAME);
2248                         exit(1);
2249                 }
2250         }
2251 #endif
2252
2253         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
2254             && !Conf_ServerAdminMail[0]) {
2255                 /* No administrative information configured! */
2256                 Config_Error(LOG_WARNING,
2257                              "No administrative information configured but required by RFC!");
2258         }
2259
2260 #ifdef PAM
2261         if (Conf_PAM && Conf_ServerPwd[0])
2262                 Config_Error(LOG_ERR,
2263                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
2264 #endif
2265
2266 #ifdef DEBUG
2267         servers = servers_once = 0;
2268         for (i = 0; i < MAX_SERVERS; i++) {
2269                 if (Conf_Server[i].name[0]) {
2270                         servers++;
2271                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
2272                                 servers_once++;
2273                 }
2274         }
2275         Log(LOG_DEBUG,
2276             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
2277             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
2278             servers, servers_once,
2279             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
2280 #endif
2281
2282         return config_valid;
2283 }
2284
2285 /**
2286  * Output "line too long" warning.
2287  *
2288  * @param Line  Line number in configuration file.
2289  * @param Item  Affected variable name.
2290  */
2291 static void
2292 Config_Error_TooLong(const char *File, const int Line, const char *Item)
2293 {
2294         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" too long!",
2295                      File, Line, Item );
2296 }
2297
2298 /**
2299  * Output "unknown variable" warning.
2300  *
2301  * @param Line          Line number in configuration file.
2302  * @param Item          Affected variable name.
2303  * @param Section       Section name.
2304  */
2305 static void
2306 Config_Error_Section(const char *File, const int Line, const char *Item,
2307                      const char *Section)
2308 {
2309         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
2310                      File, Line, Section, Item);
2311 }
2312
2313 /**
2314  * Output "not a number" warning.
2315  *
2316  * @param Line  Line number in configuration file.
2317  * @param Item  Affected variable name.
2318  */
2319 static void
2320 Config_Error_NaN(const char *File, const int Line, const char *Item )
2321 {
2322         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
2323                      File, Line, Item );
2324 }
2325
2326 /**
2327  * Output configuration error to console and/or logfile.
2328  *
2329  * On runtime, the normal log functions of the daemon are used. But when
2330  * testing the configuration ("--configtest"), all messages go directly
2331  * to the console.
2332  *
2333  * @param Level         Severity level of the message.
2334  * @param Format        Format string; see printf() function.
2335  */
2336 #ifdef PROTOTYPES
2337 static void Config_Error( const int Level, const char *Format, ... )
2338 #else
2339 static void Config_Error( Level, Format, va_alist )
2340 const int Level;
2341 const char *Format;
2342 va_dcl
2343 #endif
2344 {
2345         char msg[MAX_LOG_MSG_LEN];
2346         va_list ap;
2347
2348         assert( Format != NULL );
2349
2350 #ifdef PROTOTYPES
2351         va_start( ap, Format );
2352 #else
2353         va_start( ap );
2354 #endif
2355         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2356         va_end( ap );
2357
2358         if (!Use_Log) {
2359                 if (Level <= LOG_WARNING)
2360                         printf(" - %s\n", msg);
2361                 else
2362                         puts(msg);
2363         } else
2364                 Log(Level, "%s", msg);
2365 }
2366
2367 #ifdef DEBUG
2368
2369 /**
2370  * Dump internal state of the "configuration module".
2371  */
2372 GLOBAL void
2373 Conf_DebugDump(void)
2374 {
2375         int i;
2376
2377         Log(LOG_DEBUG, "Configured servers:");
2378         for (i = 0; i < MAX_SERVERS; i++) {
2379                 if (! Conf_Server[i].name[0])
2380                         continue;
2381                 Log(LOG_DEBUG,
2382                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2383                     Conf_Server[i].name, Conf_Server[i].host,
2384                     Conf_Server[i].port, Conf_Server[i].lasttry,
2385                     Conf_Server[i].group, Conf_Server[i].flags,
2386                     Conf_Server[i].conn_id);
2387         }
2388 }
2389
2390 #endif
2391
2392 /**
2393  * Initialize server configuration structure to default values.
2394  *
2395  * @param Server        Pointer to server structure to initialize.
2396  */
2397 static void
2398 Init_Server_Struct( CONF_SERVER *Server )
2399 {
2400         assert( Server != NULL );
2401
2402         memset( Server, 0, sizeof (CONF_SERVER) );
2403
2404         Server->group = NONE;
2405         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2406
2407         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2408
2409         Proc_InitStruct(&Server->res_stat);
2410         Server->conn_id = NONE;
2411         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2412 }
2413
2414 /* -eof- */