src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2019 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 <assert.h>
  20 #include <errno.h>
  21 #ifdef PROTOTYPES
  22 #       include <stdarg.h>
  23 #else
  24 #       include <varargs.h>
  25 #endif
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <strings.h>
  30 #include <time.h>
  31 #include <unistd.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #include <sys/types.h>
  35 #include <dirent.h>
  36
  37 #include "ngircd.h"
  38 #include "conn.h"
  39 #include "channel.h"
  40 #include "log.h"
  41 #include "match.h"
  42
  43 #include "conf.h"
  44
  45
  46 static bool Use_Log = true, Using_MotdFile = true;
  47 static CONF_SERVER New_Server;
  48 static int New_Server_Idx;
  49
  50 static char Conf_MotdFile[FNAME_LEN];
  51 static char Conf_HelpFile[FNAME_LEN];
  52 static char Conf_IncludeDir[FNAME_LEN];
  53
  54 static void Set_Defaults PARAMS(( bool InitServers ));
  55 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
  56 static void Read_Config_File PARAMS(( const char *File, FILE *fd ));
  57 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
  58
  59 static void Handle_GLOBAL PARAMS((const char *File, int Line,
  60                                   char *Var, char *Arg ));
  61 static void Handle_LIMITS PARAMS((const char *File, int Line,
  62                                   char *Var, char *Arg ));
  63 static void Handle_OPTIONS PARAMS((const char *File, int Line,
  64                                    char *Var, char *Arg ));
  65 static void Handle_OPERATOR PARAMS((const char *File, int Line,
  66                                     char *Var, char *Arg ));
  67 static void Handle_SERVER PARAMS((const char *File, int Line,
  68                                   char *Var, char *Arg ));
  69 static void Handle_CHANNEL PARAMS((const char *File, int Line,
  70                                    char *Var, char *Arg ));
  71
  72 static void Config_Error PARAMS((const int Level, const char *Format, ...));
  73
  74 static void Config_Error_NaN PARAMS((const char *File, const int LINE,
  75                                      const char *Value));
  76 static void Config_Error_Section PARAMS((const char *File, const int Line,
  77                                          const char *Item, const char *Section));
  78 static void Config_Error_TooLong PARAMS((const char *File, const int LINE,
  79                                          const char *Value));
  80
  81 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  82
  83
  84 #ifdef WANT_IPV6
  85 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  86 #else
  87 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  88 #endif
  89
  90 #ifdef HAVE_LIBSSL
  91 #define DEFAULT_CIPHERS         "HIGH:!aNULL:@STRENGTH:!SSLv3"
  92 #endif
  93 #ifdef HAVE_LIBGNUTLS
  94 #define DEFAULT_CIPHERS         "SECURE128:-VERS-SSL3.0"
  95 #endif
  96
  97 #ifdef SSL_SUPPORT
  98
  99 static void Handle_SSL PARAMS((const char *File, int Line, char *Var, char *Ark));
 100
 101 struct SSLOptions Conf_SSLOptions;
 102
 103 /**
 104  * Initialize SSL configuration.
 105  */
 106 static void
 107 ConfSSL_Init(void)
 108 {
 109         free(Conf_SSLOptions.KeyFile);
 110         Conf_SSLOptions.KeyFile = NULL;
 111
 112         free(Conf_SSLOptions.CertFile);
 113         Conf_SSLOptions.CertFile = NULL;
 114
 115         free(Conf_SSLOptions.DHFile);
 116         Conf_SSLOptions.DHFile = NULL;
 117         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 118
 119         array_free(&Conf_SSLOptions.ListenPorts);
 120
 121         free(Conf_SSLOptions.CipherList);
 122         Conf_SSLOptions.CipherList = NULL;
 123 }
 124
 125 /**
 126  * Check if the current configuration uses/requires SSL.
 127  *
 128  * @returns true if SSL is used and should be initialized.
 129  */
 130 GLOBAL bool
 131 Conf_SSLInUse(void)
 132 {
 133         int i;
 134
 135         /* SSL listen ports configured? */
 136         if (array_bytes(&Conf_SSLOptions.ListenPorts))
 137                 return true;
 138
 139         for (i = 0; i < MAX_SERVERS; i++) {
 140                 if (Conf_Server[i].port > 0
 141                     && Conf_Server[i].SSLConnect)
 142                         return true;
 143         }
 144         return false;
 145 }
 146
 147 /**
 148  * Make sure that a configured file is readable.
 149  *
 150  * Currently, this function is only used for SSL-related options ...
 151  *
 152  * @param Var Configuration variable
 153  * @param Filename Configured filename
 154  */
 155 static void
 156 CheckFileReadable(const char *Var, const char *Filename)
 157 {
 158         FILE *fp;
 159
 160         if (!Filename)
 161                 return;
 162
 163         fp = fopen(Filename, "r");
 164         if (fp)
 165                 fclose(fp);
 166         else
 167                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
 168                              Filename, Var, strerror(errno));
 169 }
 170
 171 #endif
 172
 173
 174 /**
 175  * Duplicate string and warn on errors.
 176  *
 177  * @returns Pointer to string on success, NULL otherwise.
 178  */
 179 static char *
 180 strdup_warn(const char *str)
 181 {
 182         char *ptr = strdup(str);
 183         if (!ptr)
 184                 Config_Error(LOG_ERR,
 185                              "Could not allocate memory for string: %s", str);
 186         return ptr;
 187 }
 188
 189 /**
 190  * Output a comma separated list of ports (integer values).
 191  */
 192 static void
 193 ports_puts(array *a)
 194 {
 195         size_t len;
 196         UINT16 *ports;
 197         len = array_length(a, sizeof(UINT16));
 198         if (len--) {
 199                 ports = (UINT16*) array_start(a);
 200                 printf("%u", (unsigned int) *ports);
 201                 while (len--) {
 202                         ports++;
 203                         printf(", %u", (unsigned int) *ports);
 204                 }
 205         }
 206         putc('\n', stdout);
 207 }
 208
 209 /**
 210  * Parse a comma separated string into an array of port numbers (integers).
 211  */
 212 static void
 213 ports_parse(array *a, const char *File, int Line, char *Arg)
 214 {
 215         char *ptr;
 216         int port;
 217         UINT16 port16;
 218
 219         array_trunc(a);
 220
 221         ptr = strtok( Arg, "," );
 222         while (ptr) {
 223                 ngt_TrimStr(ptr);
 224                 port = atoi(ptr);
 225                 if (port > 0 && port < 0xFFFF) {
 226                         port16 = (UINT16) port;
 227                         if (!array_catb(a, (char*)&port16, sizeof port16))
 228                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 229                                              File, Line, port, strerror(errno));
 230                 } else {
 231                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 232                                      File, Line, port );
 233                 }
 234
 235                 ptr = strtok( NULL, "," );
 236         }
 237 }
 238
 239 /**
 240  * Initialize configuration module.
 241  */
 242 GLOBAL void
 243 Conf_Init( void )
 244 {
 245         Read_Config(false, true);
 246         Validate_Config(false, false);
 247 }
 248
 249 /**
 250  * "Rehash" (reload) server configuration.
 251  *
 252  * @returns true if configuration has been re-read, false on errors.
 253  */
 254 GLOBAL bool
 255 Conf_Rehash( void )
 256 {
 257         if (!Read_Config(false, false))
 258                 return false;
 259         Validate_Config(false, true);
 260
 261         /* Update CLIENT structure of local server */
 262         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 263         return true;
 264 }
 265
 266 /**
 267  * Output a boolean value as "yes/no" string.
 268  */
 269 static const char*
 270 yesno_to_str(int boolean_value)
 271 {
 272         if (boolean_value)
 273                 return "yes";
 274         return "no";
 275 }
 276
 277 /**
 278  * Free all IRC operator configuration structures.
 279  */
 280 static void
 281 opers_free(void)
 282 {
 283         struct Conf_Oper *op;
 284         size_t len;
 285
 286         len = array_length(&Conf_Opers, sizeof(*op));
 287         op = array_start(&Conf_Opers);
 288         while (len--) {
 289                 free(op->mask);
 290                 op++;
 291         }
 292         array_free(&Conf_Opers);
 293 }
 294
 295 /**
 296  * Output all IRC operator configuration structures.
 297  */
 298 static void
 299 opers_puts(void)
 300 {
 301         struct Conf_Oper *op;
 302         size_t count, i;
 303
 304         count = array_length(&Conf_Opers, sizeof(*op));
 305         op = array_start(&Conf_Opers);
 306         for (i = 0; i < count; i++, op++) {
 307                 if (!op->name[0])
 308                         continue;
 309
 310                 puts("[OPERATOR]");
 311                 printf("  Name = %s\n", op->name);
 312                 printf("  Password = %s\n", op->pwd);
 313                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 314         }
 315 }
 316
 317 /**
 318  * Read configuration, validate and output it.
 319  *
 320  * This function waits for a keypress of the user when stdin/stdout are valid
 321  * tty's ("you can read our nice message and we can read in your keypress").
 322  *
 323  * @return      0 on success, 1 on failure(s); therefore the result code can
 324  *              directly be used by exit() when running "ngircd --configtest".
 325  */
 326 GLOBAL int
 327 Conf_Test( void )
 328 {
 329         struct passwd *pwd;
 330         struct group *grp;
 331         unsigned int i, j;
 332         bool config_valid;
 333         size_t predef_channel_count;
 334         struct Conf_Channel *predef_chan;
 335
 336         Use_Log = false;
 337
 338         if (!Read_Config(true, true))
 339                 return 1;
 340
 341         config_valid = Validate_Config(true, false);
 342
 343         /* Valid tty? */
 344         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
 345                 puts("OK, press enter to see a dump of your server configuration ...");
 346                 getchar();
 347         } else
 348                 puts("Ok, dump of your server configuration follows:\n");
 349
 350         puts("[GLOBAL]");
 351         printf("  Name = %s\n", Conf_ServerName);
 352         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 353         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 354         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 355         printf("  HelpFile = %s\n", Conf_HelpFile);
 356         printf("  Info = %s\n", Conf_ServerInfo);
 357         printf("  Listen = %s\n", Conf_ListenAddress);
 358         if (Using_MotdFile) {
 359                 printf("  MotdFile = %s\n", Conf_MotdFile);
 360                 printf("  MotdPhrase =\n");
 361         } else {
 362                 printf("  MotdFile = \n");
 363                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 364                        ? (const char*) array_start(&Conf_Motd) : "");
 365         }
 366         printf("  Network = %s\n", Conf_Network);
 367         if (!Conf_PAM)
 368                 printf("  Password = %s\n", Conf_ServerPwd);
 369         printf("  PidFile = %s\n", Conf_PidFile);
 370         printf("  Ports = ");
 371         ports_puts(&Conf_ListenPorts);
 372         grp = getgrgid(Conf_GID);
 373         if (grp)
 374                 printf("  ServerGID = %s\n", grp->gr_name);
 375         else
 376                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 377         pwd = getpwuid(Conf_UID);
 378         if (pwd)
 379                 printf("  ServerUID = %s\n", pwd->pw_name);
 380         else
 381                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 382         puts("");
 383
 384         puts("[LIMITS]");
 385         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 386         printf("  IdleTimeout = %d\n", Conf_IdleTimeout);
 387         printf("  MaxConnections = %d\n", Conf_MaxConnections);
 388         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
 389         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
 390         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
 391         printf("  MaxPenaltyTime = %ld\n", (long)Conf_MaxPenaltyTime);
 392         printf("  MaxListSize = %d\n", Conf_MaxListSize);
 393         printf("  PingTimeout = %d\n", Conf_PingTimeout);
 394         printf("  PongTimeout = %d\n", Conf_PongTimeout);
 395         puts("");
 396
 397         puts("[OPTIONS]");
 398         printf("  AllowedChannelTypes = %s\n", Conf_AllowedChannelTypes);
 399         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 400         printf("  ChrootDir = %s\n", Conf_Chroot);
 401         printf("  CloakHost = %s\n", Conf_CloakHost);
 402         printf("  CloakHostModeX = %s\n", Conf_CloakHostModeX);
 403         printf("  CloakHostSalt = %s\n", Conf_CloakHostSalt);
 404         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
 405 #ifdef WANT_IPV6
 406         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 407         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
 408 #endif
 409         printf("  DefaultUserModes = %s\n", Conf_DefaultUserModes);
 410         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 411 #ifdef IDENT
 412         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 413 #endif
 414         printf("  IncludeDir = %s\n", Conf_IncludeDir);
 415         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
 416         printf("  NoticeBeforeRegistration = %s\n", yesno_to_str(Conf_NoticeBeforeRegistration));
 417         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
 418         printf("  OperChanPAutoOp = %s\n", yesno_to_str(Conf_OperChanPAutoOp));
 419         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 420 #ifdef PAM
 421         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
 422         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
 423         printf("  PAMServiceName = %s\n", Conf_PAMServiceName);
 424 #endif
 425 #ifndef STRICT_RFC
 426         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
 427 #endif
 428         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
 429 #ifdef SYSLOG
 430         printf("  SyslogFacility = %s\n",
 431                ngt_SyslogFacilityName(Conf_SyslogFacility));
 432 #endif
 433         printf("  WebircPassword = %s\n", Conf_WebircPwd);
 434         puts("");
 435
 436 #ifdef SSL_SUPPORT
 437         puts("[SSL]");
 438         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
 439                                         ? Conf_SSLOptions.CertFile : "");
 440         printf("  CipherList = %s\n", Conf_SSLOptions.CipherList ?
 441                Conf_SSLOptions.CipherList : DEFAULT_CIPHERS);
 442         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
 443                                         ? Conf_SSLOptions.DHFile : "");
 444         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
 445                                         ? Conf_SSLOptions.KeyFile : "");
 446         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
 447                 puts("  KeyFilePassword = <secret>");
 448         else
 449                 puts("  KeyFilePassword = ");
 450         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 451         printf("  Ports = ");
 452         ports_puts(&Conf_SSLOptions.ListenPorts);
 453         puts("");
 454 #endif
 455
 456         opers_puts();
 457
 458         for( i = 0; i < MAX_SERVERS; i++ ) {
 459                 if( ! Conf_Server[i].name[0] ) continue;
 460
 461                 /* Valid "Server" section */
 462                 puts( "[SERVER]" );
 463                 printf( "  Name = %s\n", Conf_Server[i].name );
 464                 printf( "  Host = %s\n", Conf_Server[i].host );
 465                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
 466 #ifdef SSL_SUPPORT
 467                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
 468 #endif
 469                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
 470                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
 471                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
 472                 printf( "  Group = %d\n", Conf_Server[i].group );
 473                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
 474         }
 475
 476         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
 477         predef_chan = array_start(&Conf_Channels);
 478
 479         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
 480                 if (!predef_chan->name[0])
 481                         continue;
 482
 483                 /* Valid "Channel" section */
 484                 puts( "[CHANNEL]" );
 485                 printf("  Name = %s\n", predef_chan->name);
 486                 for(j = 0; j < predef_chan->modes_num; j++)
 487                         printf("  Modes = %s\n", predef_chan->modes[j]);
 488                 printf("  Key = %s\n", predef_chan->key);
 489                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
 490                 printf("  Topic = %s\n", predef_chan->topic);
 491                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
 492         }
 493
 494         return (config_valid ? 0 : 1);
 495 }
 496
 497 /**
 498  * Remove connection information from configured server.
 499  *
 500  * If the server is set as "once", delete it from our configuration;
 501  * otherwise set the time for the next connection attempt.
 502  *
 503  * Non-server connections will be silently ignored.
 504  */
 505 GLOBAL void
 506 Conf_UnsetServer( CONN_ID Idx )
 507 {
 508         int i;
 509         time_t t;
 510
 511         /* Check all our configured servers */
 512         for( i = 0; i < MAX_SERVERS; i++ ) {
 513                 if( Conf_Server[i].conn_id != Idx ) continue;
 514
 515                 /* Gotcha! Mark server configuration as "unused": */
 516                 Conf_Server[i].conn_id = NONE;
 517
 518                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 519                         /* Delete configuration here */
 520                         Init_Server_Struct( &Conf_Server[i] );
 521                 } else {
 522                         /* Set time for next connect attempt */
 523                         t = time(NULL);
 524                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
 525                                 /* The connection has been "long", so we don't
 526                                  * require the next attempt to be delayed. */
 527                                 Conf_Server[i].lasttry =
 528                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
 529                         } else {
 530                                 /* "Short" connection, enforce "ConnectRetry"
 531                                  * but randomize it a little bit: 15 seconds. */
 532                                 Conf_Server[i].lasttry =
 533 #ifdef HAVE_ARC4RANDOM
 534                                         t + (arc4random() % 15);
 535 #else
 536                                         t + rand() / (RAND_MAX / 15);
 537 #endif
 538                         }
 539                 }
 540         }
 541 }
 542
 543 /**
 544  * Set connection information for specified configured server.
 545  */
 546 GLOBAL bool
 547 Conf_SetServer( int ConfServer, CONN_ID Idx )
 548 {
 549         assert( ConfServer > NONE );
 550         assert( Idx > NONE );
 551
 552         if (Conf_Server[ConfServer].conn_id > NONE &&
 553             Conf_Server[ConfServer].conn_id != Idx) {
 554                 Log(LOG_ERR,
 555                     "Connection %d: Server configuration of \"%s\" already in use by connection %d!",
 556                     Idx, Conf_Server[ConfServer].name,
 557                     Conf_Server[ConfServer].conn_id);
 558                 Conn_Close(Idx, NULL, "Server configuration already in use", true);
 559                 return false;
 560         }
 561         Conf_Server[ConfServer].conn_id = Idx;
 562         return true;
 563 }
 564
 565 /**
 566  * Get index of server in configuration structure.
 567  */
 568 GLOBAL int
 569 Conf_GetServer( CONN_ID Idx )
 570 {
 571         int i = 0;
 572
 573         assert( Idx > NONE );
 574
 575         for( i = 0; i < MAX_SERVERS; i++ ) {
 576                 if( Conf_Server[i].conn_id == Idx ) return i;
 577         }
 578         return NONE;
 579 }
 580
 581 /**
 582  * Enable a server by name and adjust its port number.
 583  *
 584  * @returns     true if a server has been enabled and now has a valid port
 585  *              number and host name for outgoing connections.
 586  */
 587 GLOBAL bool
 588 Conf_EnableServer( const char *Name, UINT16 Port )
 589 {
 590         int i;
 591
 592         assert( Name != NULL );
 593         for( i = 0; i < MAX_SERVERS; i++ ) {
 594                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 595                         /* Gotcha! Set port and enable server: */
 596                         Conf_Server[i].port = Port;
 597                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 598                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 599                 }
 600         }
 601         return false;
 602 }
 603
 604 /**
 605  * Enable a server by name.
 606  *
 607  * The server is only usable as outgoing server, if it has set a valid port
 608  * number for outgoing connections!
 609  * If not, you have to use Conf_EnableServer() function to make it available.
 610  *
 611  * @returns     true if a server has been enabled; false otherwise.
 612  */
 613 GLOBAL bool
 614 Conf_EnablePassiveServer(const char *Name)
 615 {
 616         int i;
 617
 618         assert( Name != NULL );
 619         for (i = 0; i < MAX_SERVERS; i++) {
 620                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
 621                     && (Conf_Server[i].port > 0)) {
 622                         /* BINGO! Enable server */
 623                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 624                         Conf_Server[i].lasttry = 0;
 625                         return true;
 626                 }
 627         }
 628         return false;
 629 }
 630
 631 /**
 632  * Disable a server by name.
 633  * An already established connection will be disconnected.
 634  *
 635  * @returns     true if a server was found and has been disabled.
 636  */
 637 GLOBAL bool
 638 Conf_DisableServer( const char *Name )
 639 {
 640         int i;
 641
 642         assert( Name != NULL );
 643         for( i = 0; i < MAX_SERVERS; i++ ) {
 644                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 645                         /* Gotcha! Disable and disconnect server: */
 646                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 647                         if( Conf_Server[i].conn_id > NONE )
 648                                 Conn_Close(Conf_Server[i].conn_id, NULL,
 649                                            "Server link terminated on operator request",
 650                                            true);
 651                         return true;
 652                 }
 653         }
 654         return false;
 655 }
 656
 657 /**
 658  * Add a new remote server to our configuration.
 659  *
 660  * @param Name          Name of the new server.
 661  * @param Port          Port number to connect to or 0 for incoming connections.
 662  * @param Host          Host name to connect to.
 663  * @param MyPwd         Password that will be sent to the peer.
 664  * @param PeerPwd       Password that must be received from the peer.
 665  * @returns             true if the new server has been added; false otherwise.
 666  */
 667 GLOBAL bool
 668 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
 669                const char *MyPwd, const char *PeerPwd)
 670 {
 671         int i;
 672
 673         assert( Name != NULL );
 674         assert( Host != NULL );
 675         assert( MyPwd != NULL );
 676         assert( PeerPwd != NULL );
 677
 678         /* Search unused item in server configuration structure */
 679         for( i = 0; i < MAX_SERVERS; i++ ) {
 680                 /* Is this item used? */
 681                 if( ! Conf_Server[i].name[0] ) break;
 682         }
 683         if( i >= MAX_SERVERS ) return false;
 684
 685         Init_Server_Struct( &Conf_Server[i] );
 686         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 687         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 688         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 689         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 690         Conf_Server[i].port = Port;
 691         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 692
 693         return true;
 694 }
 695
 696 /**
 697  * Check if the given nickname is reserved for services on a particular server.
 698  *
 699  * @param ConfServer The server index to check.
 700  * @param Nick The nickname to check.
 701  * @returns true if the given nickname belongs to an "IRC service".
 702  */
 703 GLOBAL bool
 704 Conf_NickIsService(int ConfServer, const char *Nick)
 705 {
 706         assert (ConfServer >= 0);
 707         assert (ConfServer < MAX_SERVERS);
 708
 709         return MatchCaseInsensitiveList(Conf_Server[ConfServer].svs_mask,
 710                                         Nick, ",");
 711 }
 712
 713 /**
 714  * Check if the given nickname is blocked for "normal client" use.
 715  *
 716  * @param Nick The nickname to check.
 717  * @returns true if the given nickname belongs to an "IRC service".
 718  */
 719 GLOBAL bool
 720 Conf_NickIsBlocked(const char *Nick)
 721 {
 722         int i;
 723
 724         for(i = 0; i < MAX_SERVERS; i++) {
 725                 if (!Conf_Server[i].name[0])
 726                         continue;
 727                 if (Conf_NickIsService(i, Nick))
 728                         return true;
 729         }
 730         return false;
 731 }
 732
 733 /**
 734  * Initialize configuration settings with their default values.
 735  */
 736 static void
 737 Set_Defaults(bool InitServers)
 738 {
 739         int i;
 740         char random[RANDOM_SALT_LEN + 1];
 741
 742         /* Global */
 743         strcpy(Conf_ServerName, "");
 744         strcpy(Conf_ServerAdmin1, "");
 745         strcpy(Conf_ServerAdmin2, "");
 746         strcpy(Conf_ServerAdminMail, "");
 747         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 748                  PACKAGE_NAME, PACKAGE_VERSION);
 749         strcpy(Conf_Network, "");
 750         free(Conf_ListenAddress);
 751         Conf_ListenAddress = NULL;
 752         array_free(&Conf_ListenPorts);
 753         array_free(&Conf_Motd);
 754         array_free(&Conf_Helptext);
 755         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 756         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 757         strlcpy(Conf_HelpFile, DOCDIR, sizeof(Conf_HelpFile));
 758         strlcat(Conf_HelpFile, HELP_FILE, sizeof(Conf_HelpFile));
 759         strcpy(Conf_ServerPwd, "");
 760         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 761         Conf_UID = Conf_GID = 0;
 762
 763         /* Limits */
 764         Conf_ConnectRetry = 60;
 765         Conf_IdleTimeout = 0;
 766         Conf_MaxConnections = 0;
 767         Conf_MaxConnectionsIP = 5;
 768         Conf_MaxJoins = 10;
 769         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 770         Conf_MaxPenaltyTime = -1;
 771         Conf_MaxListSize = 100;
 772         Conf_PingTimeout = 120;
 773         Conf_PongTimeout = 20;
 774
 775         /* Options */
 776         strlcpy(Conf_AllowedChannelTypes, CHANTYPES,
 777                 sizeof(Conf_AllowedChannelTypes));
 778         Conf_AllowRemoteOper = false;
 779 #ifndef STRICT_RFC
 780         Conf_AuthPing = false;
 781 #endif
 782         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 783         strcpy(Conf_CloakHost, "");
 784         strcpy(Conf_CloakHostModeX, "");
 785         strlcpy(Conf_CloakHostSalt, ngt_RandomStr(random, RANDOM_SALT_LEN),
 786                 sizeof(Conf_CloakHostSalt));
 787         Conf_CloakUserToNick = false;
 788         Conf_ConnectIPv4 = true;
 789 #ifdef WANT_IPV6
 790         Conf_ConnectIPv6 = true;
 791 #else
 792         Conf_ConnectIPv6 = false;
 793 #endif
 794         strcpy(Conf_DefaultUserModes, "");
 795         Conf_DNS = true;
 796 #ifdef IDENTAUTH
 797         Conf_Ident = true;
 798 #else
 799         Conf_Ident = false;
 800 #endif
 801         strcpy(Conf_IncludeDir, "");
 802         Conf_MorePrivacy = false;
 803         Conf_NoticeBeforeRegistration = false;
 804         Conf_OperCanMode = false;
 805         Conf_OperChanPAutoOp = true;
 806         Conf_OperServerMode = false;
 807 #ifdef PAM
 808         Conf_PAM = true;
 809 #else
 810         Conf_PAM = false;
 811 #endif
 812         Conf_PAMIsOptional = false;
 813         strcpy(Conf_PAMServiceName, "ngircd");
 814         Conf_ScrubCTCP = false;
 815 #ifdef SYSLOG
 816 #ifdef LOG_LOCAL5
 817         Conf_SyslogFacility = LOG_LOCAL5;
 818 #else
 819         Conf_SyslogFacility = 0;
 820 #endif
 821 #endif
 822
 823         /* Initialize server configuration structures */
 824         if (InitServers) {
 825                 for (i = 0; i < MAX_SERVERS;
 826                      Init_Server_Struct(&Conf_Server[i++]));
 827         }
 828 }
 829
 830 /**
 831  * Get number of configured listening ports.
 832  *
 833  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
 834  */
 835 static bool
 836 no_listenports(void)
 837 {
 838         size_t cnt = array_bytes(&Conf_ListenPorts);
 839 #ifdef SSL_SUPPORT
 840         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 841 #endif
 842         return cnt == 0;
 843 }
 844
 845 /**
 846  * Read contents of a text file into an array.
 847  *
 848  * This function is used to read the MOTD and help text file, for example.
 849  *
 850  * @param Filename      Name of the file to read.
 851  * @return              true, when the file has been read in.
 852  */
 853 static bool
 854 Read_TextFile(const char *Filename, const char *Name, array *Destination)
 855 {
 856         char line[COMMAND_LEN];
 857         FILE *fp;
 858         int line_no = 1;
 859
 860         if (*Filename == '\0')
 861                 return false;
 862
 863         fp = fopen(Filename, "r");
 864         if (!fp) {
 865                 Config_Error(LOG_ERR, "Can't read %s file \"%s\": %s",
 866                              Name, Filename, strerror(errno));
 867                 return false;
 868         }
 869
 870         array_free(Destination);
 871         while (fgets(line, (int)sizeof line, fp)) {
 872                 ngt_TrimLastChr(line, '\n');
 873
 874                 /* add text including \0 */
 875                 if (!array_catb(Destination, line, strlen(line) + 1)) {
 876                         Log(LOG_ERR, "Cannot read/add \"%s\", line %d: %s",
 877                             Filename, line_no, strerror(errno));
 878                         break;
 879                 }
 880                 line_no++;
 881         }
 882         fclose(fp);
 883         return true;
 884 }
 885
 886 /**
 887  * Read ngIRCd configuration file.
 888  *
 889  * Please note that this function uses exit(1) on fatal errors and therefore
 890  * can result in ngIRCd terminating!
 891  *
 892  * @param IsStarting    Flag indicating if ngIRCd is starting or not.
 893  * @returns             true when the configuration file has been read
 894  *                      successfully; false otherwise.
 895  */
 896 static bool
 897 Read_Config(bool TestOnly, bool IsStarting)
 898 {
 899         const UINT16 defaultport = 6667;
 900         char *ptr, file[FNAME_LEN];
 901         struct dirent *entry;
 902         int i, n;
 903         FILE *fd;
 904         DIR *dh;
 905
 906         Config_Error(LOG_INFO, "Using configuration file \"%s\" ...", NGIRCd_ConfFile);
 907
 908         /* Open configuration file */
 909         fd = fopen( NGIRCd_ConfFile, "r" );
 910         if( ! fd ) {
 911                 /* No configuration file found! */
 912                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 913                                         NGIRCd_ConfFile, strerror( errno ));
 914                 if (!IsStarting)
 915                         return false;
 916                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 917                 exit( 1 );
 918         }
 919
 920         opers_free();
 921         Set_Defaults(IsStarting);
 922
 923         if (TestOnly)
 924                 Config_Error(LOG_INFO,
 925                              "Reading configuration from \"%s\" ...",
 926                              NGIRCd_ConfFile );
 927
 928         /* Clean up server configuration structure: mark all already
 929          * configured servers as "once" so that they are deleted
 930          * after the next disconnect and delete all unused servers.
 931          * And delete all servers which are "duplicates" of servers
 932          * that are already marked as "once" (such servers have been
 933          * created by the last rehash but are now useless). */
 934         for( i = 0; i < MAX_SERVERS; i++ ) {
 935                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 936                 else {
 937                         /* This structure is in use ... */
 938                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 939                                 /* Check for duplicates */
 940                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 941                                         if( n == i ) continue;
 942
 943                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 944                                                 Init_Server_Struct( &Conf_Server[n] );
 945                                                 LogDebug("Deleted unused duplicate server %d (kept %d).", n, i);
 946                                         }
 947                                 }
 948                         } else {
 949                                 /* Mark server as "once" */
 950                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 951                                 LogDebug("Marked server %d as \"once\"", i);
 952                         }
 953                 }
 954         }
 955
 956         /* Initialize variables */
 957         Init_Server_Struct( &New_Server );
 958         New_Server_Idx = NONE;
 959 #ifdef SSL_SUPPORT
 960         ConfSSL_Init();
 961 #endif
 962
 963         Read_Config_File(NGIRCd_ConfFile, fd);
 964         fclose(fd);
 965
 966         if (Conf_IncludeDir[0]) {
 967                 dh = opendir(Conf_IncludeDir);
 968                 if (!dh)
 969                         Config_Error(LOG_ALERT,
 970                                      "Can't open include directory \"%s\": %s",
 971                                      Conf_IncludeDir, strerror(errno));
 972         } else {
 973                 strlcpy(Conf_IncludeDir, SYSCONFDIR, sizeof(Conf_IncludeDir));
 974                 strlcat(Conf_IncludeDir, CONFIG_DIR, sizeof(Conf_IncludeDir));
 975                 dh = opendir(Conf_IncludeDir);
 976         }
 977
 978         /* Include further configuration files, if IncludeDir is available */
 979         if (dh) {
 980                 while ((entry = readdir(dh)) != NULL) {
 981                         ptr = strrchr(entry->d_name, '.');
 982                         if (!ptr || strcasecmp(ptr, ".conf") != 0)
 983                                 continue;
 984                         snprintf(file, sizeof(file), "%s/%s",
 985                                  Conf_IncludeDir, entry->d_name);
 986                         if (TestOnly)
 987                                 Config_Error(LOG_INFO,
 988                                              "Reading configuration from \"%s\" ...",
 989                                              file);
 990                         fd = fopen(file, "r");
 991                         if (fd) {
 992                                 Read_Config_File(file, fd);
 993                                 fclose(fd);
 994                         } else
 995                                 Config_Error(LOG_ALERT,
 996                                              "Can't read configuration \"%s\": %s",
 997                                              file, strerror(errno));
 998                 }
 999                 closedir(dh);
1000         }
1001
1002         /* Check if there is still a server to add */
1003         if( New_Server.name[0] ) {
1004                 /* Copy data to "real" server structure */
1005                 assert( New_Server_Idx > NONE );
1006                 Conf_Server[New_Server_Idx] = New_Server;
1007         }
1008
1009         /* not a single listening port? Add default. */
1010         if (no_listenports() &&
1011                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
1012         {
1013                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
1014                                         (unsigned int) defaultport, strerror(errno));
1015
1016                 exit(1);
1017         }
1018
1019         if (!Conf_ListenAddress)
1020                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
1021
1022         if (!Conf_ListenAddress) {
1023                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1024                 exit(1);
1025         }
1026
1027         /* No MOTD phrase configured? (re)try motd file. */
1028         if (array_bytes(&Conf_Motd) == 0) {
1029                 if (Read_TextFile(Conf_MotdFile, "MOTD", &Conf_Motd))
1030                         Using_MotdFile = true;
1031         }
1032
1033         /* Try to read ngIRCd help text file. */
1034         (void)Read_TextFile(Conf_HelpFile, "help text", &Conf_Helptext);
1035         if (!array_bytes(&Conf_Helptext))
1036                 Config_Error(LOG_WARNING,
1037                     "No help text available, HELP command will be of limited use.");
1038
1039 #ifdef SSL_SUPPORT
1040         /* Make sure that all SSL-related files are readable */
1041         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1042         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1043         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1044
1045         /* Set the default ciphers if none were configured */
1046         if (!Conf_SSLOptions.CipherList)
1047                 Conf_SSLOptions.CipherList = strdup_warn(DEFAULT_CIPHERS);
1048 #endif
1049
1050         return true;
1051 }
1052
1053 /**
1054  * Read in and handle a configuration file.
1055  *
1056  * @param File Name of the configuration file.
1057  * @param fd File descriptor already opened for reading.
1058  */
1059 static void
1060 Read_Config_File(const char *File, FILE *fd)
1061 {
1062         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
1063         int i, line = 0;
1064         size_t count;
1065
1066         /* Read configuration file */
1067         section[0] = '\0';
1068         while (true) {
1069                 if (!fgets(str, sizeof(str), fd))
1070                         break;
1071                 ngt_TrimStr(str);
1072                 line++;
1073
1074                 /* Skip comments and empty lines */
1075                 if (str[0] == ';' || str[0] == '#' || str[0] == '\0')
1076                         continue;
1077
1078                 if (strlen(str) >= sizeof(str) - 1) {
1079                         Config_Error(LOG_WARNING, "%s, line %d too long!",
1080                                      File, line);
1081                         continue;
1082                 }
1083
1084                 /* Is this the beginning of a new section? */
1085                 if ((str[0] == '[') && (str[strlen(str) - 1] == ']')) {
1086                         strlcpy(section, str, sizeof(section));
1087                         if (strcasecmp(section, "[GLOBAL]") == 0
1088                             || strcasecmp(section, "[LIMITS]") == 0
1089                             || strcasecmp(section, "[OPTIONS]") == 0
1090 #ifdef SSL_SUPPORT
1091                             || strcasecmp(section, "[SSL]") == 0
1092 #endif
1093                             )
1094                                 continue;
1095
1096                         if (strcasecmp(section, "[SERVER]") == 0) {
1097                                 /* Check if there is already a server to add */
1098                                 if (New_Server.name[0]) {
1099                                         /* Copy data to "real" server structure */
1100                                         assert(New_Server_Idx > NONE);
1101                                         Conf_Server[New_Server_Idx] =
1102                                         New_Server;
1103                                 }
1104
1105                                 /* Re-init structure for new server */
1106                                 Init_Server_Struct(&New_Server);
1107
1108                                 /* Search unused item in server configuration structure */
1109                                 for (i = 0; i < MAX_SERVERS; i++) {
1110                                         /* Is this item used? */
1111                                         if (!Conf_Server[i].name[0])
1112                                                 break;
1113                                 }
1114                                 if (i >= MAX_SERVERS) {
1115                                         /* Oops, no free item found! */
1116                                         Config_Error(LOG_ERR,
1117                                                      "Too many servers configured.");
1118                                         New_Server_Idx = NONE;
1119                                 } else
1120                                         New_Server_Idx = i;
1121                                 continue;
1122                         }
1123
1124                         if (strcasecmp(section, "[CHANNEL]") == 0) {
1125                                 count = array_length(&Conf_Channels,
1126                                                      sizeof(struct
1127                                                             Conf_Channel));
1128                                 if (!array_alloc
1129                                     (&Conf_Channels,
1130                                      sizeof(struct Conf_Channel), count)) {
1131                                             Config_Error(LOG_ERR,
1132                                                          "Could not allocate memory for new operator (line %d)",
1133                                                          line);
1134                                     }
1135                                 continue;
1136                         }
1137
1138                         if (strcasecmp(section, "[OPERATOR]") == 0) {
1139                                 count = array_length(&Conf_Opers,
1140                                                      sizeof(struct Conf_Oper));
1141                                 if (!array_alloc(&Conf_Opers,
1142                                                  sizeof(struct Conf_Oper),
1143                                                  count)) {
1144                                         Config_Error(LOG_ERR,
1145                                                      "Could not allocate memory for new channel (line &d)",
1146                                                      line);
1147                                 }
1148                                 continue;
1149                         }
1150
1151                         Config_Error(LOG_ERR,
1152                                      "%s, line %d: Unknown section \"%s\"!",
1153                                      File, line, section);
1154                         section[0] = 0x1;
1155                 }
1156                 if (section[0] == 0x1)
1157                         continue;
1158
1159                 /* Split line into variable name and parameters */
1160                 ptr = strchr(str, '=');
1161                 if (!ptr) {
1162                         Config_Error(LOG_ERR, "%s, line %d: Syntax error!",
1163                                      File, line);
1164                         continue;
1165                 }
1166                 *ptr = '\0';
1167                 var = str;
1168                 ngt_TrimStr(var);
1169                 arg = ptr + 1;
1170                 ngt_TrimStr(arg);
1171
1172                 if (strcasecmp(section, "[GLOBAL]") == 0)
1173                         Handle_GLOBAL(File, line, var, arg);
1174                 else if (strcasecmp(section, "[LIMITS]") == 0)
1175                         Handle_LIMITS(File, line, var, arg);
1176                 else if (strcasecmp(section, "[OPTIONS]") == 0)
1177                         Handle_OPTIONS(File, line, var, arg);
1178 #ifdef SSL_SUPPORT
1179                 else if (strcasecmp(section, "[SSL]") == 0)
1180                         Handle_SSL(File, line, var, arg);
1181 #endif
1182                 else if (strcasecmp(section, "[OPERATOR]") == 0)
1183                         Handle_OPERATOR(File, line, var, arg);
1184                 else if (strcasecmp(section, "[SERVER]") == 0)
1185                         Handle_SERVER(File, line, var, arg);
1186                 else if (strcasecmp(section, "[CHANNEL]") == 0)
1187                         Handle_CHANNEL(File, line, var, arg);
1188                 else
1189                         Config_Error(LOG_ERR,
1190                                      "%s, line %d: Variable \"%s\" outside section!",
1191                                      File, line, var);
1192         }
1193 }
1194
1195 /**
1196  * Check whether a string argument is "true" or "false".
1197  *
1198  * @param Arg   Input string.
1199  * @returns     true if the input string has been parsed as "yes", "true"
1200  *              (case insensitive) or a non-zero integer value.
1201  */
1202 static bool
1203 Check_ArgIsTrue(const char *Arg)
1204 {
1205         if (strcasecmp(Arg, "yes") == 0)
1206                 return true;
1207         if (strcasecmp(Arg, "true") == 0)
1208                 return true;
1209         if (atoi(Arg) != 0)
1210                 return true;
1211
1212         return false;
1213 }
1214
1215 /**
1216  * Handle setting of "MaxNickLength".
1217  *
1218  * @param Line  Line number in configuration file.
1219  * @raram Arg   Input string.
1220  * @returns     New configured maximum nickname length.
1221  */
1222 static unsigned int
1223 Handle_MaxNickLength(const char *File, int Line, const char *Arg)
1224 {
1225         unsigned new;
1226
1227         new = (unsigned) atoi(Arg) + 1;
1228         if (new > CLIENT_NICK_LEN) {
1229                 Config_Error(LOG_WARNING,
1230                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1231                              File, Line, CLIENT_NICK_LEN - 1);
1232                 return CLIENT_NICK_LEN;
1233         }
1234         if (new < 2) {
1235                 Config_Error(LOG_WARNING,
1236                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1237                              File, Line);
1238                 return 2;
1239         }
1240         return new;
1241 }
1242
1243 /**
1244  * Output a warning messages if IDENT is configured but not compiled in.
1245  */
1246 static void
1247 WarnIdent(const char UNUSED *File, int UNUSED Line)
1248 {
1249 #ifndef IDENTAUTH
1250         if (Conf_Ident) {
1251                 /* user has enabled ident lookups explicitly, but ... */
1252                 Config_Error(LOG_WARNING,
1253                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1254                         File, Line);
1255         }
1256 #endif
1257 }
1258
1259 /**
1260  * Output a warning messages if IPv6 is configured but not compiled in.
1261  */
1262 static void
1263 WarnIPv6(const char UNUSED *File, int UNUSED Line)
1264 {
1265 #ifndef WANT_IPV6
1266         if (Conf_ConnectIPv6) {
1267                 /* user has enabled IPv6 explicitly, but ... */
1268                 Config_Error(LOG_WARNING,
1269                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1270                         File, Line);
1271         }
1272 #endif
1273 }
1274
1275 /**
1276  * Output a warning messages if PAM is configured but not compiled in.
1277  */
1278 static void
1279 WarnPAM(const char UNUSED *File, int UNUSED Line)
1280 {
1281 #ifndef PAM
1282         if (Conf_PAM) {
1283                 Config_Error(LOG_WARNING,
1284                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1285                         File, Line);
1286         }
1287 #endif
1288 }
1289
1290
1291 /**
1292  * Handle variable in [Global] configuration section.
1293  *
1294  * @param Line  Line numer in configuration file.
1295  * @param Var   Variable name.
1296  * @param Arg   Variable argument.
1297  */
1298 static void
1299 Handle_GLOBAL(const char *File, int Line, char *Var, char *Arg )
1300 {
1301         struct passwd *pwd;
1302         struct group *grp;
1303         size_t len;
1304         char *ptr;
1305
1306         assert(File != NULL);
1307         assert(Line > 0);
1308         assert(Var != NULL);
1309         assert(Arg != NULL);
1310
1311         if (strcasecmp(Var, "Name") == 0) {
1312                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1313                 if (len >= sizeof(Conf_ServerName))
1314                         Config_Error_TooLong(File, Line, Var);
1315                 return;
1316         }
1317         if (strcasecmp(Var, "AdminInfo1") == 0) {
1318                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1319                 if (len >= sizeof(Conf_ServerAdmin1))
1320                         Config_Error_TooLong(File, Line, Var);
1321                 return;
1322         }
1323         if (strcasecmp(Var, "AdminInfo2") == 0) {
1324                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1325                 if (len >= sizeof(Conf_ServerAdmin2))
1326                         Config_Error_TooLong(File, Line, Var);
1327                 return;
1328         }
1329         if (strcasecmp(Var, "AdminEMail") == 0) {
1330                 len = strlcpy(Conf_ServerAdminMail, Arg,
1331                         sizeof(Conf_ServerAdminMail));
1332                 if (len >= sizeof(Conf_ServerAdminMail))
1333                         Config_Error_TooLong(File, Line, Var);
1334                 return;
1335         }
1336         if (strcasecmp(Var, "Info") == 0) {
1337                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1338                 if (len >= sizeof(Conf_ServerInfo))
1339                         Config_Error_TooLong(File, Line, Var);
1340                 return;
1341         }
1342         if (strcasecmp(Var, "HelpFile") == 0) {
1343                 len = strlcpy(Conf_HelpFile, Arg, sizeof(Conf_HelpFile));
1344                 if (len >= sizeof(Conf_HelpFile))
1345                         Config_Error_TooLong(File, Line, Var);
1346                 return;
1347         }
1348         if (strcasecmp(Var, "Listen") == 0) {
1349                 if (Conf_ListenAddress) {
1350                         Config_Error(LOG_ERR,
1351                                      "Multiple Listen= options, ignoring: %s",
1352                                      Arg);
1353                         return;
1354                 }
1355                 Conf_ListenAddress = strdup_warn(Arg);
1356                 /* If allocation fails, we're in trouble: we cannot ignore the
1357                  * error -- otherwise ngircd would listen on all interfaces. */
1358                 if (!Conf_ListenAddress) {
1359                         Config_Error(LOG_ALERT,
1360                                      "%s exiting due to fatal errors!",
1361                                      PACKAGE_NAME);
1362                         exit(1);
1363                 }
1364                 return;
1365         }
1366         if (strcasecmp(Var, "MotdFile") == 0) {
1367                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1368                 if (len >= sizeof(Conf_MotdFile))
1369                         Config_Error_TooLong(File, Line, Var);
1370                 return;
1371         }
1372         if (strcasecmp(Var, "MotdPhrase") == 0) {
1373                 len = strlen(Arg);
1374                 if (len == 0)
1375                         return;
1376                 if (len >= 127) {
1377                         Config_Error_TooLong(File, Line, Var);
1378                         return;
1379                 }
1380                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1381                         Config_Error(LOG_WARNING,
1382                                      "%s, line %d: Could not append MotdPhrase: %s",
1383                                      File, Line, strerror(errno));
1384                 Using_MotdFile = false;
1385                 return;
1386         }
1387         if (strcasecmp(Var, "Network") == 0) {
1388                 len = strlcpy(Conf_Network, Arg, sizeof(Conf_Network));
1389                 if (len >= sizeof(Conf_Network))
1390                         Config_Error_TooLong(File, Line, Var);
1391                 ptr = strchr(Conf_Network, ' ');
1392                 if (ptr) {
1393                         Config_Error(LOG_WARNING,
1394                                      "%s, line %d: \"Network\" can't contain spaces!",
1395                                      File, Line);
1396                         *ptr = '\0';
1397                 }
1398                 return;
1399         }
1400         if(strcasecmp(Var, "Password") == 0) {
1401                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1402                 if (len >= sizeof(Conf_ServerPwd))
1403                         Config_Error_TooLong(File, Line, Var);
1404                 return;
1405         }
1406         if (strcasecmp(Var, "PidFile") == 0) {
1407                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1408                 if (len >= sizeof(Conf_PidFile))
1409                         Config_Error_TooLong(File, Line, Var);
1410                 return;
1411         }
1412         if (strcasecmp(Var, "Ports") == 0) {
1413                 ports_parse(&Conf_ListenPorts, File, Line, Arg);
1414                 return;
1415         }
1416         if (strcasecmp(Var, "ServerGID") == 0) {
1417                 grp = getgrnam(Arg);
1418                 if (grp)
1419                         Conf_GID = grp->gr_gid;
1420                 else {
1421                         Conf_GID = (unsigned int)atoi(Arg);
1422                         if (!Conf_GID && strcmp(Arg, "0"))
1423                                 Config_Error(LOG_WARNING,
1424                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1425                                              File, Line, Var);
1426                 }
1427                 return;
1428         }
1429         if (strcasecmp(Var, "ServerUID") == 0) {
1430                 pwd = getpwnam(Arg);
1431                 if (pwd)
1432                         Conf_UID = pwd->pw_uid;
1433                 else {
1434                         Conf_UID = (unsigned int)atoi(Arg);
1435                         if (!Conf_UID && strcmp(Arg, "0"))
1436                                 Config_Error(LOG_WARNING,
1437                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1438                                              File, Line, Var);
1439                 }
1440                 return;
1441         }
1442
1443         Config_Error_Section(File, Line, Var, "Global");
1444 }
1445
1446 /**
1447  * Handle variable in [Limits] configuration section.
1448  *
1449  * @param Line  Line numer in configuration file.
1450  * @param Var   Variable name.
1451  * @param Arg   Variable argument.
1452  */
1453 static void
1454 Handle_LIMITS(const char *File, int Line, char *Var, char *Arg)
1455 {
1456         assert(File != NULL);
1457         assert(Line > 0);
1458         assert(Var != NULL);
1459         assert(Arg != NULL);
1460
1461         if (strcasecmp(Var, "ConnectRetry") == 0) {
1462                 Conf_ConnectRetry = atoi(Arg);
1463                 if (Conf_ConnectRetry < 5) {
1464                         Config_Error(LOG_WARNING,
1465                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1466                                      File, Line);
1467                         Conf_ConnectRetry = 5;
1468                 }
1469                 return;
1470         }
1471         if (strcasecmp(Var, "IdleTimeout") == 0) {
1472                 Conf_IdleTimeout = atoi(Arg);
1473                 if (!Conf_IdleTimeout && strcmp(Arg, "0"))
1474                         Config_Error_NaN(File, Line, Var);
1475                 return;
1476         }
1477         if (strcasecmp(Var, "MaxConnections") == 0) {
1478                 Conf_MaxConnections = atoi(Arg);
1479                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1480                         Config_Error_NaN(File, Line, Var);
1481                 return;
1482         }
1483         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1484                 Conf_MaxConnectionsIP = atoi(Arg);
1485                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1486                         Config_Error_NaN(File, Line, Var);
1487                 return;
1488         }
1489         if (strcasecmp(Var, "MaxJoins") == 0) {
1490                 Conf_MaxJoins = atoi(Arg);
1491                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1492                         Config_Error_NaN(File, Line, Var);
1493                 return;
1494         }
1495         if (strcasecmp(Var, "MaxNickLength") == 0) {
1496                 Conf_MaxNickLength = Handle_MaxNickLength(File, Line, Arg);
1497                 return;
1498         }
1499         if (strcasecmp(Var, "MaxListSize") == 0) {
1500                 Conf_MaxListSize = atoi(Arg);
1501                 if (!Conf_MaxListSize && strcmp(Arg, "0"))
1502                         Config_Error_NaN(File, Line, Var);
1503                 return;
1504         }
1505         if (strcasecmp(Var, "MaxPenaltyTime") == 0) {
1506                 Conf_MaxPenaltyTime = atol(Arg);
1507                 if (Conf_MaxPenaltyTime < -1)
1508                         Conf_MaxPenaltyTime = -1;       /* "unlimited" */
1509                 return;
1510         }
1511         if (strcasecmp(Var, "PingTimeout") == 0) {
1512                 Conf_PingTimeout = atoi(Arg);
1513                 if (Conf_PingTimeout < 5) {
1514                         Config_Error(LOG_WARNING,
1515                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1516                                      File, Line);
1517                         Conf_PingTimeout = 5;
1518                 }
1519                 return;
1520         }
1521         if (strcasecmp(Var, "PongTimeout") == 0) {
1522                 Conf_PongTimeout = atoi(Arg);
1523                 if (Conf_PongTimeout < 5) {
1524                         Config_Error(LOG_WARNING,
1525                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1526                                      File, Line);
1527                         Conf_PongTimeout = 5;
1528                 }
1529                 return;
1530         }
1531
1532         Config_Error_Section(File, Line, Var, "Limits");
1533 }
1534
1535 /**
1536  * Handle variable in [Options] configuration section.
1537  *
1538  * @param Line  Line numer in configuration file.
1539  * @param Var   Variable name.
1540  * @param Arg   Variable argument.
1541  */
1542 static void
1543 Handle_OPTIONS(const char *File, int Line, char *Var, char *Arg)
1544 {
1545         size_t len;
1546         char *p;
1547
1548         assert(File != NULL);
1549         assert(Line > 0);
1550         assert(Var != NULL);
1551         assert(Arg != NULL);
1552
1553         if (strcasecmp(Var, "AllowedChannelTypes") == 0) {
1554                 p = Arg;
1555                 Conf_AllowedChannelTypes[0] = '\0';
1556                 while (*p) {
1557                         if (strchr(Conf_AllowedChannelTypes, *p)) {
1558                                 /* Prefix is already included; ignore it */
1559                                 p++;
1560                                 continue;
1561                         }
1562
1563                         if (strchr(CHANTYPES, *p)) {
1564                                 len = strlen(Conf_AllowedChannelTypes) + 1;
1565                                 assert(len < sizeof(Conf_AllowedChannelTypes));
1566                                 Conf_AllowedChannelTypes[len - 1] = *p;
1567                                 Conf_AllowedChannelTypes[len] = '\0';
1568                         } else {
1569                                 Config_Error(LOG_WARNING,
1570                                              "%s, line %d: Unknown channel prefix \"%c\" in \"AllowedChannelTypes\"!",
1571                                              File, Line, *p);
1572                         }
1573                         p++;
1574                 }
1575                 return;
1576         }
1577         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1578                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1579                 return;
1580         }
1581         if (strcasecmp(Var, "ChrootDir") == 0) {
1582                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1583                 if (len >= sizeof(Conf_Chroot))
1584                         Config_Error_TooLong(File, Line, Var);
1585                 return;
1586         }
1587         if (strcasecmp(Var, "CloakHost") == 0) {
1588                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1589                 if (len >= sizeof(Conf_CloakHost))
1590                         Config_Error_TooLong(File, Line, Var);
1591                 return;
1592         }
1593         if (strcasecmp(Var, "CloakHostModeX") == 0) {
1594                 len = strlcpy(Conf_CloakHostModeX, Arg, sizeof(Conf_CloakHostModeX));
1595                 if (len >= sizeof(Conf_CloakHostModeX))
1596                         Config_Error_TooLong(File, Line, Var);
1597                 return;
1598         }
1599         if (strcasecmp(Var, "CloakHostSalt") == 0) {
1600                 len = strlcpy(Conf_CloakHostSalt, Arg, sizeof(Conf_CloakHostSalt));
1601                 if (len >= sizeof(Conf_CloakHostSalt))
1602                         Config_Error_TooLong(File, Line, Var);
1603                 return;
1604         }
1605         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1606                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1607                 return;
1608         }
1609         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1610                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1611                 WarnIPv6(File, Line);
1612                 return;
1613         }
1614         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1615                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1616                 return;
1617         }
1618         if (strcasecmp(Var, "DefaultUserModes") == 0) {
1619                 p = Arg;
1620                 Conf_DefaultUserModes[0] = '\0';
1621                 while (*p) {
1622                         if (strchr(Conf_DefaultUserModes, *p)) {
1623                                 /* Mode is already included; ignore it */
1624                                 p++;
1625                                 continue;
1626                         }
1627
1628                         if (strchr(USERMODES, *p)) {
1629                                 len = strlen(Conf_DefaultUserModes) + 1;
1630                                 assert(len < sizeof(Conf_DefaultUserModes));
1631                                 Conf_DefaultUserModes[len - 1] = *p;
1632                                 Conf_DefaultUserModes[len] = '\0';
1633                         } else {
1634                                 Config_Error(LOG_WARNING,
1635                                              "%s, line %d: Unknown user mode \"%c\" in \"DefaultUserModes\"!",
1636                                              File, Line, *p);
1637                         }
1638                         p++;
1639                 }
1640                 return;
1641         }
1642         if (strcasecmp(Var, "DNS") == 0) {
1643                 Conf_DNS = Check_ArgIsTrue(Arg);
1644                 return;
1645         }
1646         if (strcasecmp(Var, "Ident") == 0) {
1647                 Conf_Ident = Check_ArgIsTrue(Arg);
1648                 WarnIdent(File, Line);
1649                 return;
1650         }
1651         if (strcasecmp(Var, "IncludeDir") == 0) {
1652                 if (Conf_IncludeDir[0]) {
1653                         Config_Error(LOG_ERR,
1654                                      "%s, line %d: Can't overwrite value of \"IncludeDir\" variable!",
1655                                      File, Line);
1656                         return;
1657                 }
1658                 len = strlcpy(Conf_IncludeDir, Arg, sizeof(Conf_IncludeDir));
1659                 if (len >= sizeof(Conf_IncludeDir))
1660                         Config_Error_TooLong(File, Line, Var);
1661                 return;
1662         }
1663         if (strcasecmp(Var, "MorePrivacy") == 0) {
1664                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1665                 return;
1666         }
1667         if (strcasecmp(Var, "NoticeBeforeRegistration") == 0) {
1668                 Conf_NoticeBeforeRegistration = Check_ArgIsTrue(Arg);
1669                 return;
1670         }
1671         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1672                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1673                 return;
1674         }
1675         if (strcasecmp(Var, "OperChanPAutoOp") == 0) {
1676                 Conf_OperChanPAutoOp = Check_ArgIsTrue(Arg);
1677                 return;
1678         }
1679         if (strcasecmp(Var, "OperServerMode") == 0) {
1680                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1681                 return;
1682         }
1683         if (strcasecmp(Var, "PAM") == 0) {
1684                 Conf_PAM = Check_ArgIsTrue(Arg);
1685                 WarnPAM(File, Line);
1686                 return;
1687         }
1688         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1689                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1690                 return;
1691         }
1692         if (strcasecmp(Var, "PAMServiceName") == 0) {
1693                 len = strlcpy(Conf_PAMServiceName, Arg, sizeof(Conf_PAMServiceName));
1694                 if (len >= sizeof(Conf_PAMServiceName))
1695                         Config_Error_TooLong(File, Line, Var);
1696                 return;
1697         }
1698 #ifndef STRICT_RFC
1699         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1700                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1701                 return;
1702         }
1703 #endif
1704         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1705                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1706                 return;
1707         }
1708 #ifdef SYSLOG
1709         if (strcasecmp(Var, "SyslogFacility") == 0) {
1710                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1711                                                            Conf_SyslogFacility);
1712                 return;
1713         }
1714 #endif
1715         if (strcasecmp(Var, "WebircPassword") == 0) {
1716                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1717                 if (len >= sizeof(Conf_WebircPwd))
1718                         Config_Error_TooLong(File, Line, Var);
1719                 return;
1720         }
1721
1722         Config_Error_Section(File, Line, Var, "Options");
1723 }
1724
1725 #ifdef SSL_SUPPORT
1726
1727 /**
1728  * Handle variable in [SSL] configuration section.
1729  *
1730  * @param Line  Line numer in configuration file.
1731  * @param Var   Variable name.
1732  * @param Arg   Variable argument.
1733  */
1734 static void
1735 Handle_SSL(const char *File, int Line, char *Var, char *Arg)
1736 {
1737         assert(File != NULL);
1738         assert(Line > 0);
1739         assert(Var != NULL);
1740         assert(Arg != NULL);
1741
1742         if (strcasecmp(Var, "CertFile") == 0) {
1743                 assert(Conf_SSLOptions.CertFile == NULL);
1744                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1745                 return;
1746         }
1747         if (strcasecmp(Var, "DHFile") == 0) {
1748                 assert(Conf_SSLOptions.DHFile == NULL);
1749                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1750                 return;
1751         }
1752         if (strcasecmp(Var, "KeyFile") == 0) {
1753                 assert(Conf_SSLOptions.KeyFile == NULL);
1754                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1755                 return;
1756         }
1757         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1758                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1759                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1760                         Config_Error(LOG_ERR,
1761                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1762                                      File, Line, Var, strerror(errno));
1763                 return;
1764         }
1765         if (strcasecmp(Var, "Ports") == 0) {
1766                 ports_parse(&Conf_SSLOptions.ListenPorts, File, Line, Arg);
1767                 return;
1768         }
1769         if (strcasecmp(Var, "CipherList") == 0) {
1770                 assert(Conf_SSLOptions.CipherList == NULL);
1771                 Conf_SSLOptions.CipherList = strdup_warn(Arg);
1772                 return;
1773         }
1774
1775         Config_Error_Section(File, Line, Var, "SSL");
1776 }
1777
1778 #endif
1779
1780 /**
1781  * Handle variable in [Operator] configuration section.
1782  *
1783  * @param Line  Line numer in configuration file.
1784  * @param Var   Variable name.
1785  * @param Arg   Variable argument.
1786  */
1787 static void
1788 Handle_OPERATOR(const char *File, int Line, char *Var, char *Arg )
1789 {
1790         size_t len;
1791         struct Conf_Oper *op;
1792
1793         assert( File != NULL );
1794         assert( Line > 0 );
1795         assert( Var != NULL );
1796         assert( Arg != NULL );
1797
1798         op = array_get(&Conf_Opers, sizeof(*op),
1799                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1800         if (!op)
1801                 return;
1802
1803         if (strcasecmp(Var, "Name") == 0) {
1804                 /* Name of IRC operator */
1805                 len = strlcpy(op->name, Arg, sizeof(op->name));
1806                 if (len >= sizeof(op->name))
1807                                 Config_Error_TooLong(File, Line, Var);
1808                 return;
1809         }
1810         if (strcasecmp(Var, "Password") == 0) {
1811                 /* Password of IRC operator */
1812                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1813                 if (len >= sizeof(op->pwd))
1814                                 Config_Error_TooLong(File, Line, Var);
1815                 return;
1816         }
1817         if (strcasecmp(Var, "Mask") == 0) {
1818                 if (op->mask)
1819                         return; /* Hostname already configured */
1820                 op->mask = strdup_warn( Arg );
1821                 return;
1822         }
1823
1824         Config_Error_Section(File, Line, Var, "Operator");
1825 }
1826
1827 /**
1828  * Handle variable in [Server] configuration section.
1829  *
1830  * @param Line  Line numer in configuration file.
1831  * @param Var   Variable name.
1832  * @param Arg   Variable argument.
1833  */
1834 static void
1835 Handle_SERVER(const char *File, int Line, char *Var, char *Arg )
1836 {
1837         long port;
1838         size_t len;
1839
1840         assert( File != NULL );
1841         assert( Line > 0 );
1842         assert( Var != NULL );
1843         assert( Arg != NULL );
1844
1845         /* Ignore server block if no space is left in server configuration structure */
1846         if( New_Server_Idx <= NONE ) return;
1847
1848         if( strcasecmp( Var, "Host" ) == 0 ) {
1849                 /* Hostname of the server */
1850                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1851                 if (len >= sizeof( New_Server.host ))
1852                         Config_Error_TooLong(File, Line, Var);
1853                 return;
1854         }
1855         if( strcasecmp( Var, "Name" ) == 0 ) {
1856                 /* Name of the server ("Nick"/"ID") */
1857                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1858                 if (len >= sizeof( New_Server.name ))
1859                         Config_Error_TooLong(File, Line, Var);
1860                 return;
1861         }
1862         if (strcasecmp(Var, "Bind") == 0) {
1863                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1864                         return;
1865
1866                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1867                              File, Line, Arg);
1868                 return;
1869         }
1870         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1871                 /* Password of this server which is sent to the peer */
1872                 if (*Arg == ':') {
1873                         Config_Error(LOG_ERR,
1874                                      "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1875                                      File, Line);
1876                 }
1877                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1878                 if (len >= sizeof( New_Server.pwd_in ))
1879                         Config_Error_TooLong(File, Line, Var);
1880                 return;
1881         }
1882         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1883                 /* Passwort of the peer which must be received */
1884                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1885                 if (len >= sizeof( New_Server.pwd_out ))
1886                         Config_Error_TooLong(File, Line, Var);
1887                 return;
1888         }
1889         if( strcasecmp( Var, "Port" ) == 0 ) {
1890                 /* Port to which this server should connect */
1891                 port = atol( Arg );
1892                 if (port >= 0 && port < 0xFFFF)
1893                         New_Server.port = (UINT16)port;
1894                 else
1895                         Config_Error(LOG_ERR,
1896                                      "%s, line %d (section \"Server\"): Illegal port number %ld!",
1897                                      File, Line, port );
1898                 return;
1899         }
1900 #ifdef SSL_SUPPORT
1901         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1902                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1903                 return;
1904         }
1905 #endif
1906         if( strcasecmp( Var, "Group" ) == 0 ) {
1907                 /* Server group */
1908                 New_Server.group = atoi( Arg );
1909                 if (!New_Server.group && strcmp(Arg, "0"))
1910                         Config_Error_NaN(File, Line, Var);
1911                 return;
1912         }
1913         if( strcasecmp( Var, "Passive" ) == 0 ) {
1914                 if (Check_ArgIsTrue(Arg))
1915                         New_Server.flags |= CONF_SFLAG_DISABLED;
1916                 return;
1917         }
1918         if (strcasecmp(Var, "ServiceMask") == 0) {
1919                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1920                               sizeof(New_Server.svs_mask));
1921                 if (len >= sizeof(New_Server.svs_mask))
1922                         Config_Error_TooLong(File, Line, Var);
1923                 return;
1924         }
1925
1926         Config_Error_Section(File, Line, Var, "Server");
1927 }
1928
1929 /**
1930  * Copy channel name into channel structure.
1931  *
1932  * If the channel name is not valid because of a missing prefix ('#', '&'),
1933  * a default prefix of '#' will be added.
1934  *
1935  * @param new_chan      New already allocated channel structure.
1936  * @param name          Name of the new channel.
1937  * @returns             true on success, false otherwise.
1938  */
1939 static bool
1940 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1941 {
1942         size_t size = sizeof(new_chan->name);
1943         char *dest = new_chan->name;
1944
1945         if (!Channel_IsValidName(name)) {
1946                 /*
1947                  * maybe user forgot to add a '#'.
1948                  * This is only here for user convenience.
1949                  */
1950                 *dest = '#';
1951                 --size;
1952                 ++dest;
1953         }
1954         return size > strlcpy(dest, name, size);
1955 }
1956
1957 /**
1958  * Handle variable in [Channel] configuration section.
1959  *
1960  * @param Line  Line numer in configuration file.
1961  * @param Var   Variable name.
1962  * @param Arg   Variable argument.
1963  */
1964 static void
1965 Handle_CHANNEL(const char *File, int Line, char *Var, char *Arg)
1966 {
1967         size_t len;
1968         struct Conf_Channel *chan;
1969
1970         assert( File != NULL );
1971         assert( Line > 0 );
1972         assert( Var != NULL );
1973         assert( Arg != NULL );
1974
1975         chan = array_get(&Conf_Channels, sizeof(*chan),
1976                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1977         if (!chan)
1978                 return;
1979
1980         if (strcasecmp(Var, "Name") == 0) {
1981                 if (!Handle_Channelname(chan, Arg))
1982                         Config_Error_TooLong(File, Line, Var);
1983                 return;
1984         }
1985         if (strcasecmp(Var, "Modes") == 0) {
1986                 /* Initial modes */
1987                 if(chan->modes_num >= sizeof(chan->modes)) {
1988                         Config_Error(LOG_ERR, "Too many Modes, option ignored.");
1989                         return;
1990                 }
1991                 chan->modes[chan->modes_num++] = strndup(Arg, COMMAND_LEN);
1992                 if(strlen(Arg) >= COMMAND_LEN)
1993                         Config_Error_TooLong(File, Line, Var);
1994                 return;
1995         }
1996         if( strcasecmp( Var, "Topic" ) == 0 ) {
1997                 /* Initial topic */
1998                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1999                 if (len >= sizeof(chan->topic))
2000                         Config_Error_TooLong(File, Line, Var);
2001                 return;
2002         }
2003         if( strcasecmp( Var, "Key" ) == 0 ) {
2004                 /* Initial Channel Key (mode k) */
2005                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
2006                 if (len >= sizeof(chan->key))
2007                         Config_Error_TooLong(File, Line, Var);
2008                 Config_Error(LOG_WARNING,
2009                              "%s, line %d (section \"Channel\"): \"%s\" is deprecated here, use \"Modes = +k <key>\"!",
2010                              File, Line, Var);
2011                 return;
2012         }
2013         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
2014                 /* maximum user limit, mode l */
2015                 chan->maxusers = (unsigned long) atol(Arg);
2016                 if (!chan->maxusers && strcmp(Arg, "0"))
2017                         Config_Error_NaN(File, Line, Var);
2018                 Config_Error(LOG_WARNING,
2019                              "%s, line %d (section \"Channel\"): \"%s\" is deprecated here, use \"Modes = +l <limit>\"!",
2020                              File, Line, Var);
2021                 return;
2022         }
2023         if (strcasecmp(Var, "KeyFile") == 0) {
2024                 /* channel keys */
2025                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
2026                 if (len >= sizeof(chan->keyfile))
2027                         Config_Error_TooLong(File, Line, Var);
2028                 return;
2029         }
2030
2031         Config_Error_Section(File, Line, Var, "Channel");
2032 }
2033
2034 /**
2035  * Validate server configuration.
2036  *
2037  * Please note that this function uses exit(1) on fatal errors and therefore
2038  * can result in ngIRCd terminating!
2039  *
2040  * @param Configtest    true if the daemon has been called with "--configtest".
2041  * @param Rehash        true if re-reading configuration on runtime.
2042  * @returns             true if configuration is valid.
2043  */
2044 static bool
2045 Validate_Config(bool Configtest, bool Rehash)
2046 {
2047         /* Validate configuration settings. */
2048
2049         int i, servers, servers_once;
2050         bool config_valid = true;
2051         char *ptr;
2052
2053         /* Emit a warning when the config file is not a full path name */
2054         if (NGIRCd_ConfFile[0] && NGIRCd_ConfFile[0] != '/') {
2055                 Config_Error(LOG_WARNING,
2056                         "Not specifying a full path name to \"%s\" can cause problems when rehashing the server!",
2057                         NGIRCd_ConfFile);
2058         }
2059
2060         /* Validate configured server name, see RFC 2812 section 2.3.1 */
2061         ptr = Conf_ServerName;
2062         do {
2063                 if (*ptr >= 'a' && *ptr <= 'z') continue;
2064                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
2065                 if (*ptr >= '0' && *ptr <= '9') continue;
2066                 if (ptr > Conf_ServerName) {
2067                         if (*ptr == '.' || *ptr == '-')
2068                                 continue;
2069                 }
2070                 Conf_ServerName[0] = '\0';
2071                 break;
2072         } while (*(++ptr));
2073
2074         if (!Conf_ServerName[0] || !strchr(Conf_ServerName, '.'))
2075         {
2076                 /* No server name configured! */
2077                 config_valid = false;
2078                 Config_Error(LOG_ALERT,
2079                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
2080                              NGIRCd_ConfFile);
2081                 if (!Configtest && !Rehash) {
2082                         Config_Error(LOG_ALERT,
2083                                      "%s exiting due to fatal errors!",
2084                                      PACKAGE_NAME);
2085                         exit(1);
2086                 }
2087         }
2088
2089 #ifdef STRICT_RFC
2090         if (!Conf_ServerAdminMail[0]) {
2091                 /* No administrative contact configured! */
2092                 config_valid = false;
2093                 Config_Error(LOG_ALERT,
2094                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
2095                              NGIRCd_ConfFile);
2096                 if (!Configtest) {
2097                         Config_Error(LOG_ALERT,
2098                                      "%s exiting due to fatal errors!",
2099                                      PACKAGE_NAME);
2100                         exit(1);
2101                 }
2102         }
2103 #endif
2104
2105         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
2106             && !Conf_ServerAdminMail[0]) {
2107                 /* No administrative information configured! */
2108                 Config_Error(LOG_WARNING,
2109                              "No administrative information configured but required by RFC!");
2110         }
2111
2112 #ifdef PAM
2113         if (Conf_PAM && Conf_ServerPwd[0])
2114                 Config_Error(LOG_ERR,
2115                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
2116 #endif
2117
2118         if (Conf_MaxPenaltyTime != -1)
2119                 Config_Error(LOG_WARNING,
2120                              "Maximum penalty increase ('MaxPenaltyTime') is set to %ld, this is not recommended!",
2121                              Conf_MaxPenaltyTime);
2122
2123         servers = servers_once = 0;
2124         for (i = 0; i < MAX_SERVERS; i++) {
2125                 if (Conf_Server[i].name[0]) {
2126                         servers++;
2127                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
2128                                 servers_once++;
2129                 }
2130         }
2131         LogDebug("Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
2132             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
2133             servers, servers_once,
2134             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
2135
2136         return config_valid;
2137 }
2138
2139 /**
2140  * Output "line too long" warning.
2141  *
2142  * @param Line  Line number in configuration file.
2143  * @param Item  Affected variable name.
2144  */
2145 static void
2146 Config_Error_TooLong(const char *File, const int Line, const char *Item)
2147 {
2148         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" too long!",
2149                      File, Line, Item );
2150 }
2151
2152 /**
2153  * Output "unknown variable" warning.
2154  *
2155  * @param Line          Line number in configuration file.
2156  * @param Item          Affected variable name.
2157  * @param Section       Section name.
2158  */
2159 static void
2160 Config_Error_Section(const char *File, const int Line, const char *Item,
2161                      const char *Section)
2162 {
2163         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
2164                      File, Line, Section, Item);
2165 }
2166
2167 /**
2168  * Output "not a number" warning.
2169  *
2170  * @param Line  Line number in configuration file.
2171  * @param Item  Affected variable name.
2172  */
2173 static void
2174 Config_Error_NaN(const char *File, const int Line, const char *Item )
2175 {
2176         Config_Error(LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
2177                      File, Line, Item );
2178 }
2179
2180 /**
2181  * Output configuration error to console and/or logfile.
2182  *
2183  * On runtime, the normal log functions of the daemon are used. But when
2184  * testing the configuration ("--configtest"), all messages go directly
2185  * to the console.
2186  *
2187  * @param Level         Severity level of the message.
2188  * @param Format        Format string; see printf() function.
2189  */
2190 #ifdef PROTOTYPES
2191 static void Config_Error( const int Level, const char *Format, ... )
2192 #else
2193 static void Config_Error( Level, Format, va_alist )
2194 const int Level;
2195 const char *Format;
2196 va_dcl
2197 #endif
2198 {
2199         char msg[MAX_LOG_MSG_LEN];
2200         va_list ap;
2201
2202         assert( Format != NULL );
2203
2204 #ifdef PROTOTYPES
2205         va_start( ap, Format );
2206 #else
2207         va_start( ap );
2208 #endif
2209         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2210         va_end( ap );
2211
2212         if (!Use_Log) {
2213                 if (Level <= LOG_WARNING)
2214                         printf(" - %s\n", msg);
2215                 else
2216                         puts(msg);
2217         } else
2218                 Log(Level, "%s", msg);
2219 }
2220
2221
2222 /**
2223  * Dump internal state of the "configuration module".
2224  */
2225 GLOBAL void
2226 Conf_DebugDump(void)
2227 {
2228         int i;
2229
2230         LogDebug("Configured servers:");
2231         for (i = 0; i < MAX_SERVERS; i++) {
2232                 if (! Conf_Server[i].name[0])
2233                         continue;
2234                 LogDebug(
2235                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2236                     Conf_Server[i].name, Conf_Server[i].host,
2237                     Conf_Server[i].port, Conf_Server[i].lasttry,
2238                     Conf_Server[i].group, Conf_Server[i].flags,
2239                     Conf_Server[i].conn_id);
2240         }
2241 }
2242
2243
2244 /**
2245  * Initialize server configuration structure to default values.
2246  *
2247  * @param Server        Pointer to server structure to initialize.
2248  */
2249 static void
2250 Init_Server_Struct( CONF_SERVER *Server )
2251 {
2252         assert( Server != NULL );
2253
2254         memset( Server, 0, sizeof (CONF_SERVER) );
2255
2256         Server->group = NONE;
2257         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2258
2259         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2260
2261         Proc_InitStruct(&Server->res_stat);
2262         Server->conn_id = NONE;
2263         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2264 }
2265
2266 /* -eof- */