src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * Configuration management (reading, parsing & validation)
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <errno.h>
  22 #ifdef PROTOTYPES
  23 #       include <stdarg.h>
  24 #else
  25 #       include <varargs.h>
  26 #endif
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <strings.h>
  31 #include <unistd.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36
  37 #ifdef HAVE_CTYPE_H
  38 # include <ctype.h>
  39 #endif
  40
  41 #include "array.h"
  42 #include "ngircd.h"
  43 #include "conn.h"
  44 #include "channel.h"
  45 #include "defines.h"
  46 #include "log.h"
  47 #include "match.h"
  48 #include "tool.h"
  49
  50 #include "exp.h"
  51 #include "conf.h"
  52
  53
  54 static bool Use_Log = true, Using_MotdFile = true;
  55 static CONF_SERVER New_Server;
  56 static int New_Server_Idx;
  57
  58 static char Conf_MotdFile[FNAME_LEN];
  59
  60 static void Set_Defaults PARAMS(( bool InitServers ));
  61 static bool Read_Config PARAMS(( bool TestOnly, bool IsStarting ));
  62 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
  63
  64 static void Handle_GLOBAL PARAMS(( int Line, char *Var, char *Arg ));
  65 static void Handle_LIMITS PARAMS(( int Line, char *Var, char *Arg ));
  66 static void Handle_OPTIONS PARAMS(( int Line, char *Var, char *Arg ));
  67 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
  68 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
  69 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
  70
  71 static void Config_Error PARAMS(( const int Level, const char *Format, ... ));
  72
  73 static void Config_Error_NaN PARAMS(( const int LINE, const char *Value ));
  74 static void Config_Error_Section PARAMS(( const int Line, const char *Item,
  75                                           const char *Section ));
  76 static void Config_Error_TooLong PARAMS(( const int LINE, const char *Value ));
  77
  78 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  79
  80
  81 #ifdef WANT_IPV6
  82 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  83 #else
  84 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  85 #endif
  86
  87
  88 #ifdef SSL_SUPPORT
  89
  90 static void Handle_SSL PARAMS(( int Line, char *Var, char *Ark ));
  91
  92 struct SSLOptions Conf_SSLOptions;
  93
  94 /**
  95  * Initialize SSL configuration.
  96  */
  97 static void
  98 ConfSSL_Init(void)
  99 {
 100         free(Conf_SSLOptions.KeyFile);
 101         Conf_SSLOptions.KeyFile = NULL;
 102
 103         free(Conf_SSLOptions.CertFile);
 104         Conf_SSLOptions.CertFile = NULL;
 105
 106         free(Conf_SSLOptions.DHFile);
 107         Conf_SSLOptions.DHFile = NULL;
 108         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 109 }
 110
 111 /**
 112  * Make sure that a configured file is readable.
 113  *
 114  * Currently, this function is only used for SSL-related options ...
 115  *
 116  * @param Var Configuration variable
 117  * @param Filename Configured filename
 118  */
 119 static void
 120 CheckFileReadable(const char *Var, const char *Filename)
 121 {
 122         FILE *fp;
 123
 124         if (!Filename)
 125                 return;
 126
 127         fp = fopen(Filename, "r");
 128         if (fp)
 129                 fclose(fp);
 130         else
 131                 Config_Error(LOG_ERR, "Can't read \"%s\" (\"%s\"): %s",
 132                              Filename, Var, strerror(errno));
 133 }
 134
 135 #endif
 136
 137
 138 /**
 139  * Duplicate string and warn on errors.
 140  *
 141  * @returns Pointer to string on success, NULL otherwise.
 142  */
 143 static char *
 144 strdup_warn(const char *str)
 145 {
 146         char *ptr = strdup(str);
 147         if (!ptr)
 148                 Config_Error(LOG_ERR,
 149                              "Could not allocate memory for string: %s", str);
 150         return ptr;
 151 }
 152
 153 /**
 154  * Output a comma separated list of ports (integer values).
 155  */
 156 static void
 157 ports_puts(array *a)
 158 {
 159         size_t len;
 160         UINT16 *ports;
 161         len = array_length(a, sizeof(UINT16));
 162         if (len--) {
 163                 ports = (UINT16*) array_start(a);
 164                 printf("%u", (unsigned int) *ports);
 165                 while (len--) {
 166                         ports++;
 167                         printf(", %u", (unsigned int) *ports);
 168                 }
 169         }
 170         putc('\n', stdout);
 171 }
 172
 173 /**
 174  * Parse a comma separated string into an array of port numbers (integers).
 175  */
 176 static void
 177 ports_parse(array *a, int Line, char *Arg)
 178 {
 179         char *ptr;
 180         int port;
 181         UINT16 port16;
 182
 183         array_trunc(a);
 184
 185         ptr = strtok( Arg, "," );
 186         while (ptr) {
 187                 ngt_TrimStr(ptr);
 188                 port = atoi(ptr);
 189                 if (port > 0 && port < 0xFFFF) {
 190                         port16 = (UINT16) port;
 191                         if (!array_catb(a, (char*)&port16, sizeof port16))
 192                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 193                                                         NGIRCd_ConfFile, Line, port, strerror(errno));
 194                 } else {
 195                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 196                                                                         NGIRCd_ConfFile, Line, port );
 197                 }
 198
 199                 ptr = strtok( NULL, "," );
 200         }
 201 }
 202
 203 /**
 204  * Initialize configuration module.
 205  */
 206 GLOBAL void
 207 Conf_Init( void )
 208 {
 209         Read_Config(false, true);
 210         Validate_Config(false, false);
 211 }
 212
 213 /**
 214  * "Rehash" (reload) server configuration.
 215  *
 216  * @returns true if configuration has been re-read, false on errors.
 217  */
 218 GLOBAL bool
 219 Conf_Rehash( void )
 220 {
 221         if (!Read_Config(false, false))
 222                 return false;
 223         Validate_Config(false, true);
 224
 225         /* Update CLIENT structure of local server */
 226         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 227         return true;
 228 }
 229
 230 /**
 231  * Output a boolean value as "yes/no" string.
 232  */
 233 static const char*
 234 yesno_to_str(int boolean_value)
 235 {
 236         if (boolean_value)
 237                 return "yes";
 238         return "no";
 239 }
 240
 241 /**
 242  * Free all IRC operator configuration structures.
 243  */
 244 static void
 245 opers_free(void)
 246 {
 247         struct Conf_Oper *op;
 248         size_t len;
 249
 250         len = array_length(&Conf_Opers, sizeof(*op));
 251         op = array_start(&Conf_Opers);
 252         while (len--) {
 253                 free(op->mask);
 254                 op++;
 255         }
 256         array_free(&Conf_Opers);
 257 }
 258
 259 /**
 260  * Output all IRC operator configuration structures.
 261  */
 262 static void
 263 opers_puts(void)
 264 {
 265         struct Conf_Oper *op;
 266         size_t count, i;
 267
 268         count = array_length(&Conf_Opers, sizeof(*op));
 269         op = array_start(&Conf_Opers);
 270         for (i = 0; i < count; i++, op++) {
 271                 if (!op->name[0])
 272                         continue;
 273
 274                 puts("[OPERATOR]");
 275                 printf("  Name = %s\n", op->name);
 276                 printf("  Password = %s\n", op->pwd);
 277                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 278         }
 279 }
 280
 281 /**
 282  * Read configuration, validate and output it.
 283  *
 284  * This function waits for a keypress of the user when stdin/stdout are valid
 285  * tty's ("you can read our nice message and we can read in your keypress").
 286  *
 287  * @return      0 on succes, 1 on failure(s); therefore the result code can
 288  *              directly be used by exit() when running "ngircd --configtest".
 289  */
 290 GLOBAL int
 291 Conf_Test( void )
 292 {
 293         struct passwd *pwd;
 294         struct group *grp;
 295         unsigned int i;
 296         bool config_valid;
 297         size_t predef_channel_count;
 298         struct Conf_Channel *predef_chan;
 299
 300         Use_Log = false;
 301
 302         if (!Read_Config(true, true))
 303                 return 1;
 304
 305         config_valid = Validate_Config(true, false);
 306
 307         /* Valid tty? */
 308         if(isatty(fileno(stdin)) && isatty(fileno(stdout))) {
 309                 puts("OK, press enter to see a dump of your server configuration ...");
 310                 getchar();
 311         } else
 312                 puts("Ok, dump of your server configuration follows:\n");
 313
 314         puts("[GLOBAL]");
 315         printf("  Name = %s\n", Conf_ServerName);
 316         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 317         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 318         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 319         printf("  Info = %s\n", Conf_ServerInfo);
 320         printf("  Listen = %s\n", Conf_ListenAddress);
 321         if (Using_MotdFile) {
 322                 printf("  MotdFile = %s\n", Conf_MotdFile);
 323                 printf("  MotdPhrase =\n");
 324         } else {
 325                 printf("  MotdFile = \n");
 326                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 327                        ? (const char*) array_start(&Conf_Motd) : "");
 328         }
 329 #ifndef PAM
 330         printf("  Password = %s\n", Conf_ServerPwd);
 331 #endif
 332         printf("  PidFile = %s\n", Conf_PidFile);
 333         printf("  Ports = ");
 334         ports_puts(&Conf_ListenPorts);
 335         grp = getgrgid(Conf_GID);
 336         if (grp)
 337                 printf("  ServerGID = %s\n", grp->gr_name);
 338         else
 339                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 340         pwd = getpwuid(Conf_UID);
 341         if (pwd)
 342                 printf("  ServerUID = %s\n", pwd->pw_name);
 343         else
 344                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 345         puts("");
 346
 347         puts("[LIMITS]");
 348         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 349         printf("  MaxConnections = %ld\n", Conf_MaxConnections);
 350         printf("  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
 351         printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
 352         printf("  MaxNickLength = %u\n", Conf_MaxNickLength - 1);
 353         printf("  PingTimeout = %d\n", Conf_PingTimeout);
 354         printf("  PongTimeout = %d\n", Conf_PongTimeout);
 355         puts("");
 356
 357         puts("[OPTIONS]");
 358         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 359         printf("  ChrootDir = %s\n", Conf_Chroot);
 360         printf("  CloakHost = %s\n", Conf_CloakHost);
 361         printf("  CloakHostModeX = %s\n", Conf_CloakHostModeX);
 362         printf("  CloakHostSalt = %s\n", Conf_CloakHostSalt);
 363         printf("  CloakUserToNick = %s\n", yesno_to_str(Conf_CloakUserToNick));
 364 #ifdef WANT_IPV6
 365         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 366         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
 367 #endif
 368         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 369 #ifdef IDENT
 370         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 371 #endif
 372         printf("  MorePrivacy = %s\n", yesno_to_str(Conf_MorePrivacy));
 373         printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
 374         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
 375         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 376 #ifdef PAM
 377         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
 378         printf("  PAMIsOptional = %s\n", yesno_to_str(Conf_PAMIsOptional));
 379 #endif
 380         printf("  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
 381 #ifndef STRICT_RFC
 382         printf("  RequireAuthPing = %s\n", yesno_to_str(Conf_AuthPing));
 383 #endif
 384         printf("  ScrubCTCP = %s\n", yesno_to_str(Conf_ScrubCTCP));
 385 #ifdef SYSLOG
 386         printf("  SyslogFacility = %s\n",
 387                ngt_SyslogFacilityName(Conf_SyslogFacility));
 388 #endif
 389         printf("  WebircPassword = %s\n", Conf_WebircPwd);
 390         puts("");
 391
 392 #ifdef SSL_SUPPORT
 393         puts("[SSL]");
 394         printf("  CertFile = %s\n", Conf_SSLOptions.CertFile
 395                                         ? Conf_SSLOptions.CertFile : "");
 396         printf("  DHFile = %s\n", Conf_SSLOptions.DHFile
 397                                         ? Conf_SSLOptions.DHFile : "");
 398         printf("  KeyFile = %s\n", Conf_SSLOptions.KeyFile
 399                                         ? Conf_SSLOptions.KeyFile : "");
 400         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
 401                 puts("  KeyFilePassword = <secret>");
 402         else
 403                 puts("  KeyFilePassword = ");
 404         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 405         printf("  Ports = ");
 406         ports_puts(&Conf_SSLOptions.ListenPorts);
 407         puts("");
 408 #endif
 409
 410         opers_puts();
 411
 412         for( i = 0; i < MAX_SERVERS; i++ ) {
 413                 if( ! Conf_Server[i].name[0] ) continue;
 414
 415                 /* Valid "Server" section */
 416                 puts( "[SERVER]" );
 417                 printf( "  Name = %s\n", Conf_Server[i].name );
 418                 printf( "  Host = %s\n", Conf_Server[i].host );
 419                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
 420 #ifdef SSL_SUPPORT
 421                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
 422 #endif
 423                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
 424                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
 425                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
 426                 printf( "  Group = %d\n", Conf_Server[i].group );
 427                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
 428         }
 429
 430         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
 431         predef_chan = array_start(&Conf_Channels);
 432
 433         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
 434                 if (!predef_chan->name[0])
 435                         continue;
 436
 437                 /* Valid "Channel" section */
 438                 puts( "[CHANNEL]" );
 439                 printf("  Name = %s\n", predef_chan->name);
 440                 printf("  Modes = %s\n", predef_chan->modes);
 441                 printf("  Key = %s\n", predef_chan->key);
 442                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
 443                 printf("  Topic = %s\n", predef_chan->topic);
 444                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
 445         }
 446
 447         return (config_valid ? 0 : 1);
 448 }
 449
 450 /**
 451  * Remove connection information from configured server.
 452  *
 453  * If the server is set as "once", delete it from our configuration;
 454  * otherwise set the time for the next connection attempt.
 455  *
 456  * Non-server connections will be silently ignored.
 457  */
 458 GLOBAL void
 459 Conf_UnsetServer( CONN_ID Idx )
 460 {
 461         int i;
 462         time_t t;
 463
 464         /* Check all our configured servers */
 465         for( i = 0; i < MAX_SERVERS; i++ ) {
 466                 if( Conf_Server[i].conn_id != Idx ) continue;
 467
 468                 /* Gotcha! Mark server configuration as "unused": */
 469                 Conf_Server[i].conn_id = NONE;
 470
 471                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 472                         /* Delete configuration here */
 473                         Init_Server_Struct( &Conf_Server[i] );
 474                 } else {
 475                         /* Set time for next connect attempt */
 476                         t = time(NULL);
 477                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
 478                                 /* The connection has been "long", so we don't
 479                                  * require the next attempt to be delayed. */
 480                                 Conf_Server[i].lasttry =
 481                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
 482                         } else
 483                                 Conf_Server[i].lasttry = t;
 484                 }
 485         }
 486 }
 487
 488 /**
 489  * Set connection information for specified configured server.
 490  */
 491 GLOBAL void
 492 Conf_SetServer( int ConfServer, CONN_ID Idx )
 493 {
 494         assert( ConfServer > NONE );
 495         assert( Idx > NONE );
 496
 497         if (Conf_Server[ConfServer].conn_id > NONE &&
 498             Conf_Server[ConfServer].conn_id != Idx) {
 499                 Log(LOG_ALERT,
 500                         "Trying to update connection index for already registered server \"%s\": %d/%d - ignored.",
 501                         Conf_Server[ConfServer].name,
 502                         Conf_Server[ConfServer].conn_id, Idx);
 503                 return;
 504         }
 505         Conf_Server[ConfServer].conn_id = Idx;
 506 }
 507
 508 /**
 509  * Get index of server in configuration structure.
 510  */
 511 GLOBAL int
 512 Conf_GetServer( CONN_ID Idx )
 513 {
 514         int i = 0;
 515
 516         assert( Idx > NONE );
 517
 518         for( i = 0; i < MAX_SERVERS; i++ ) {
 519                 if( Conf_Server[i].conn_id == Idx ) return i;
 520         }
 521         return NONE;
 522 }
 523
 524 /**
 525  * Enable a server by name and adjust its port number.
 526  *
 527  * @returns     true if a server has been enabled and now has a valid port
 528  *              number and host name for outgoing connections.
 529  */
 530 GLOBAL bool
 531 Conf_EnableServer( const char *Name, UINT16 Port )
 532 {
 533         int i;
 534
 535         assert( Name != NULL );
 536         for( i = 0; i < MAX_SERVERS; i++ ) {
 537                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 538                         /* Gotcha! Set port and enable server: */
 539                         Conf_Server[i].port = Port;
 540                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 541                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 542                 }
 543         }
 544         return false;
 545 }
 546
 547 /**
 548  * Enable a server by name.
 549  *
 550  * The server is only usable as outgoing server, if it has set a valid port
 551  * number for outgoing connections!
 552  * If not, you have to use Conf_EnableServer() function to make it available.
 553  *
 554  * @returns     true if a server has been enabled; false otherwise.
 555  */
 556 GLOBAL bool
 557 Conf_EnablePassiveServer(const char *Name)
 558 {
 559         int i;
 560
 561         assert( Name != NULL );
 562         for (i = 0; i < MAX_SERVERS; i++) {
 563                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0)
 564                     && (Conf_Server[i].port > 0)) {
 565                         /* BINGO! Enable server */
 566                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 567                         return true;
 568                 }
 569         }
 570         return false;
 571 }
 572
 573 /**
 574  * Disable a server by name.
 575  * An already established connection will be disconnected.
 576  *
 577  * @returns     true if a server was found and has been disabled.
 578  */
 579 GLOBAL bool
 580 Conf_DisableServer( const char *Name )
 581 {
 582         int i;
 583
 584         assert( Name != NULL );
 585         for( i = 0; i < MAX_SERVERS; i++ ) {
 586                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 587                         /* Gotcha! Disable and disconnect server: */
 588                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 589                         if( Conf_Server[i].conn_id > NONE )
 590                                 Conn_Close(Conf_Server[i].conn_id, NULL,
 591                                            "Server link terminated on operator request",
 592                                            true);
 593                         return true;
 594                 }
 595         }
 596         return false;
 597 }
 598
 599 /**
 600  * Add a new remote server to our configuration.
 601  *
 602  * @param Name          Name of the new server.
 603  * @param Port          Port number to connect to or 0 for incoming connections.
 604  * @param Host          Host name to connect to.
 605  * @param MyPwd         Password that will be sent to the peer.
 606  * @param PeerPwd       Password that must be received from the peer.
 607  * @returns             true if the new server has been added; false otherwise.
 608  */
 609 GLOBAL bool
 610 Conf_AddServer(const char *Name, UINT16 Port, const char *Host,
 611                const char *MyPwd, const char *PeerPwd)
 612 {
 613         int i;
 614
 615         assert( Name != NULL );
 616         assert( Host != NULL );
 617         assert( MyPwd != NULL );
 618         assert( PeerPwd != NULL );
 619
 620         /* Search unused item in server configuration structure */
 621         for( i = 0; i < MAX_SERVERS; i++ ) {
 622                 /* Is this item used? */
 623                 if( ! Conf_Server[i].name[0] ) break;
 624         }
 625         if( i >= MAX_SERVERS ) return false;
 626
 627         Init_Server_Struct( &Conf_Server[i] );
 628         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 629         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 630         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 631         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 632         Conf_Server[i].port = Port;
 633         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 634
 635         return true;
 636 }
 637
 638 /**
 639  * Check if the given nick name is reserved for services on a particular server.
 640  *
 641  * @param ConfServer The server index to check.
 642  * @param Nick The nick name to check.
 643  * @returns true if the given nick name belongs to an "IRC service".
 644  */
 645 GLOBAL bool
 646 Conf_NickIsService(int ConfServer, const char *Nick)
 647 {
 648         assert (ConfServer >= 0);
 649         assert (ConfServer < MAX_SERVERS);
 650
 651         return MatchCaseInsensitive(Conf_Server[ConfServer].svs_mask, Nick);
 652 }
 653
 654 /**
 655  * Initialize configuration settings with their default values.
 656  */
 657 static void
 658 Set_Defaults(bool InitServers)
 659 {
 660         int i;
 661         char random[RANDOM_SALT_LEN + 1];
 662
 663         /* Global */
 664         strcpy(Conf_ServerName, "");
 665         strcpy(Conf_ServerAdmin1, "");
 666         strcpy(Conf_ServerAdmin2, "");
 667         strcpy(Conf_ServerAdminMail, "");
 668         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 669                  PACKAGE_NAME, PACKAGE_VERSION);
 670         free(Conf_ListenAddress);
 671         Conf_ListenAddress = NULL;
 672         array_free(&Conf_Motd);
 673         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 674         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 675         strcpy(Conf_ServerPwd, "");
 676         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 677         Conf_UID = Conf_GID = 0;
 678
 679         /* Limits */
 680         Conf_ConnectRetry = 60;
 681         Conf_MaxConnections = 0;
 682         Conf_MaxConnectionsIP = 5;
 683         Conf_MaxJoins = 10;
 684         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 685         Conf_PingTimeout = 120;
 686         Conf_PongTimeout = 20;
 687
 688         /* Options */
 689         Conf_AllowRemoteOper = false;
 690 #ifndef STRICT_RFC
 691         Conf_AuthPing = false;
 692 #endif
 693         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 694         strcpy(Conf_CloakHost, "");
 695         strcpy(Conf_CloakHostModeX, "");
 696         strcpy(Conf_CloakHostSalt, ngt_RandomStr(random, RANDOM_SALT_LEN));
 697         Conf_CloakUserToNick = false;
 698         Conf_ConnectIPv4 = true;
 699 #ifdef WANT_IPV6
 700         Conf_ConnectIPv6 = true;
 701 #else
 702         Conf_ConnectIPv6 = false;
 703 #endif
 704         Conf_DNS = true;
 705 #ifdef IDENTAUTH
 706         Conf_Ident = true;
 707 #else
 708         Conf_Ident = false;
 709 #endif
 710         Conf_MorePrivacy = false;
 711         Conf_NoticeAuth = false;
 712         Conf_OperCanMode = false;
 713         Conf_OperServerMode = false;
 714 #ifdef PAM
 715         Conf_PAM = true;
 716 #else
 717         Conf_PAM = false;
 718 #endif
 719         Conf_PAMIsOptional = false;
 720         Conf_PredefChannelsOnly = false;
 721 #ifdef SYSLOG
 722         Conf_ScrubCTCP = false;
 723 #ifdef LOG_LOCAL5
 724         Conf_SyslogFacility = LOG_LOCAL5;
 725 #else
 726         Conf_SyslogFacility = 0;
 727 #endif
 728 #endif
 729
 730         /* Initialize server configuration structures */
 731         if (InitServers) {
 732                 for (i = 0; i < MAX_SERVERS;
 733                      Init_Server_Struct(&Conf_Server[i++]));
 734         }
 735 }
 736
 737 /**
 738  * Get number of configured listening ports.
 739  *
 740  * @returns The number of ports (IPv4+IPv6) on which the server should listen.
 741  */
 742 static bool
 743 no_listenports(void)
 744 {
 745         size_t cnt = array_bytes(&Conf_ListenPorts);
 746 #ifdef SSL_SUPPORT
 747         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 748 #endif
 749         return cnt == 0;
 750 }
 751
 752 /**
 753  * Read MOTD ("message of the day") file.
 754  *
 755  * @param filename      Name of the file to read.
 756  */
 757 static void
 758 Read_Motd(const char *filename)
 759 {
 760         char line[127];
 761         FILE *fp;
 762
 763         if (*filename == '\0')
 764                 return;
 765
 766         fp = fopen(filename, "r");
 767         if (!fp) {
 768                 Config_Error(LOG_WARNING, "Can't read MOTD file \"%s\": %s",
 769                                         filename, strerror(errno));
 770                 return;
 771         }
 772
 773         array_free(&Conf_Motd);
 774         Using_MotdFile = true;
 775
 776         while (fgets(line, (int)sizeof line, fp)) {
 777                 ngt_TrimLastChr( line, '\n');
 778
 779                 /* add text including \0 */
 780                 if (!array_catb(&Conf_Motd, line, strlen(line) + 1)) {
 781                         Log(LOG_WARNING, "Cannot add MOTD text: %s", strerror(errno));
 782                         break;
 783                 }
 784         }
 785         fclose(fp);
 786 }
 787
 788 /**
 789  * Read ngIRCd configuration file.
 790  *
 791  * Please note that this function uses exit(1) on fatal errors and therefore
 792  * can result in ngIRCd terminating!
 793  *
 794  * @param ngircd_starting       Flag indicating if ngIRCd is starting or not.
 795  * @returns                     true when the configuration file has been read
 796  *                              successfully; false otherwise.
 797  */
 798 static bool
 799 Read_Config(bool TestOnly, bool IsStarting)
 800 {
 801         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
 802         const UINT16 defaultport = 6667;
 803         int line, i, n;
 804         size_t count;
 805         FILE *fd;
 806
 807         /* Open configuration file */
 808         fd = fopen( NGIRCd_ConfFile, "r" );
 809         if( ! fd ) {
 810                 /* No configuration file found! */
 811                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 812                                         NGIRCd_ConfFile, strerror( errno ));
 813                 if (!IsStarting)
 814                         return false;
 815                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 816                 exit( 1 );
 817         }
 818
 819         opers_free();
 820         Set_Defaults(IsStarting);
 821
 822         if (TestOnly)
 823                 Config_Error(LOG_INFO,
 824                              "Reading configuration from \"%s\" ...",
 825                              NGIRCd_ConfFile );
 826
 827         /* Clean up server configuration structure: mark all already
 828          * configured servers as "once" so that they are deleted
 829          * after the next disconnect and delete all unused servers.
 830          * And delete all servers which are "duplicates" of servers
 831          * that are already marked as "once" (such servers have been
 832          * created by the last rehash but are now useless). */
 833         for( i = 0; i < MAX_SERVERS; i++ ) {
 834                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 835                 else {
 836                         /* This structure is in use ... */
 837                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 838                                 /* Check for duplicates */
 839                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 840                                         if( n == i ) continue;
 841
 842                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 843                                                 Init_Server_Struct( &Conf_Server[n] );
 844 #ifdef DEBUG
 845                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
 846                                                                                                 n, i );
 847 #endif
 848                                         }
 849                                 }
 850                         } else {
 851                                 /* Mark server as "once" */
 852                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 853                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
 854                         }
 855                 }
 856         }
 857
 858         /* Initialize variables */
 859         line = 0;
 860         strcpy( section, "" );
 861         Init_Server_Struct( &New_Server );
 862         New_Server_Idx = NONE;
 863 #ifdef SSL_SUPPORT
 864         ConfSSL_Init();
 865 #endif
 866         /* Read configuration file */
 867         while( true ) {
 868                 if( ! fgets( str, LINE_LEN, fd )) break;
 869                 ngt_TrimStr( str );
 870                 line++;
 871
 872                 /* Skip comments and empty lines */
 873                 if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
 874
 875                 /* Is this the beginning of a new section? */
 876                 if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' )) {
 877                         strlcpy( section, str, sizeof( section ));
 878                         if (strcasecmp(section, "[GLOBAL]") == 0
 879                             || strcasecmp(section, "[LIMITS]") == 0
 880                             || strcasecmp(section, "[OPTIONS]") == 0
 881 #ifdef SSL_SUPPORT
 882                             || strcasecmp(section, "[SSL]") == 0
 883 #endif
 884                             )
 885                                 continue;
 886
 887                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
 888                                 /* Check if there is already a server to add */
 889                                 if( New_Server.name[0] ) {
 890                                         /* Copy data to "real" server structure */
 891                                         assert( New_Server_Idx > NONE );
 892                                         Conf_Server[New_Server_Idx] = New_Server;
 893                                 }
 894
 895                                 /* Re-init structure for new server */
 896                                 Init_Server_Struct( &New_Server );
 897
 898                                 /* Search unused item in server configuration structure */
 899                                 for( i = 0; i < MAX_SERVERS; i++ ) {
 900                                         /* Is this item used? */
 901                                         if( ! Conf_Server[i].name[0] ) break;
 902                                 }
 903                                 if( i >= MAX_SERVERS ) {
 904                                         /* Oops, no free item found! */
 905                                         Config_Error( LOG_ERR, "Too many servers configured." );
 906                                         New_Server_Idx = NONE;
 907                                 }
 908                                 else New_Server_Idx = i;
 909                                 continue;
 910                         }
 911
 912                         if (strcasecmp(section, "[CHANNEL]") == 0) {
 913                                 count = array_length(&Conf_Channels,
 914                                                      sizeof(struct Conf_Channel));
 915                                 if (!array_alloc(&Conf_Channels,
 916                                                  sizeof(struct Conf_Channel),
 917                                                  count)) {
 918                                         Config_Error(LOG_ERR,
 919                                                      "Could not allocate memory for new operator (line %d)",
 920                                                      line);
 921                                 }
 922                                 continue;
 923                         }
 924
 925                         if (strcasecmp(section, "[OPERATOR]") == 0) {
 926                                 count = array_length(&Conf_Opers,
 927                                                      sizeof(struct Conf_Oper));
 928                                 if (!array_alloc(&Conf_Opers,
 929                                                  sizeof(struct Conf_Oper),
 930                                                  count)) {
 931                                         Config_Error(LOG_ERR,
 932                                                      "Could not allocate memory for new channel (line &d)",
 933                                                      line);
 934                                 }
 935                                 continue;
 936                         }
 937
 938                         Config_Error(LOG_ERR,
 939                                      "%s, line %d: Unknown section \"%s\"!",
 940                                      NGIRCd_ConfFile, line, section);
 941                         section[0] = 0x1;
 942                 }
 943                 if( section[0] == 0x1 ) continue;
 944
 945                 /* Split line into variable name and parameters */
 946                 ptr = strchr( str, '=' );
 947                 if( ! ptr ) {
 948                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
 949                         continue;
 950                 }
 951                 *ptr = '\0';
 952                 var = str; ngt_TrimStr( var );
 953                 arg = ptr + 1; ngt_TrimStr( arg );
 954
 955                 if(strcasecmp(section, "[GLOBAL]") == 0)
 956                         Handle_GLOBAL(line, var, arg);
 957                 else if(strcasecmp(section, "[LIMITS]") == 0)
 958                         Handle_LIMITS(line, var, arg);
 959                 else if(strcasecmp(section, "[OPTIONS]") == 0)
 960                         Handle_OPTIONS(line, var, arg);
 961 #ifdef SSL_SUPPORT
 962                 else if(strcasecmp(section, "[SSL]") == 0)
 963                         Handle_SSL(line, var, arg);
 964 #endif
 965                 else if(strcasecmp(section, "[OPERATOR]") == 0)
 966                         Handle_OPERATOR(line, var, arg);
 967                 else if(strcasecmp(section, "[SERVER]") == 0)
 968                         Handle_SERVER(line, var, arg);
 969                 else if(strcasecmp(section, "[CHANNEL]") == 0)
 970                         Handle_CHANNEL(line, var, arg);
 971                 else
 972                         Config_Error(LOG_ERR,
 973                                      "%s, line %d: Variable \"%s\" outside section!",
 974                                      NGIRCd_ConfFile, line, var);
 975         }
 976
 977         /* Close configuration file */
 978         fclose( fd );
 979
 980         /* Check if there is still a server to add */
 981         if( New_Server.name[0] ) {
 982                 /* Copy data to "real" server structure */
 983                 assert( New_Server_Idx > NONE );
 984                 Conf_Server[New_Server_Idx] = New_Server;
 985         }
 986
 987         /* not a single listening port? Add default. */
 988         if (no_listenports() &&
 989                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
 990         {
 991                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
 992                                         (unsigned int) defaultport, strerror(errno));
 993
 994                 exit(1);
 995         }
 996
 997         if (!Conf_ListenAddress)
 998                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
 999
1000         if (!Conf_ListenAddress) {
1001                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1002                 exit(1);
1003         }
1004
1005         /* No MOTD phrase configured? (re)try motd file. */
1006         if (array_bytes(&Conf_Motd) == 0)
1007                 Read_Motd(Conf_MotdFile);
1008
1009 #ifdef SSL_SUPPORT
1010         /* Make sure that all SSL-related files are readable */
1011         CheckFileReadable("CertFile", Conf_SSLOptions.CertFile);
1012         CheckFileReadable("DHFile", Conf_SSLOptions.DHFile);
1013         CheckFileReadable("KeyFile", Conf_SSLOptions.KeyFile);
1014 #endif
1015
1016         return true;
1017 }
1018
1019 /**
1020  * Check whether a string argument is "true" or "false".
1021  *
1022  * @param Arg   Input string.
1023  * @returns     true if the input string has been parsed as "yes", "true"
1024  *              (case insensitive) or a non-zero integer value.
1025  */
1026 static bool
1027 Check_ArgIsTrue(const char *Arg)
1028 {
1029         if (strcasecmp(Arg, "yes") == 0)
1030                 return true;
1031         if (strcasecmp(Arg, "true") == 0)
1032                 return true;
1033         if (atoi(Arg) != 0)
1034                 return true;
1035
1036         return false;
1037 }
1038
1039 /**
1040  * Handle setting of "MaxNickLength".
1041  *
1042  * @param Line  Line number in configuration file.
1043  * @raram Arg   Input string.
1044  * @returns     New configured maximum nick name length.
1045  */
1046 static unsigned int
1047 Handle_MaxNickLength(int Line, const char *Arg)
1048 {
1049         unsigned new;
1050
1051         new = (unsigned) atoi(Arg) + 1;
1052         if (new > CLIENT_NICK_LEN) {
1053                 Config_Error(LOG_WARNING,
1054                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
1055                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
1056                 return CLIENT_NICK_LEN;
1057         }
1058         if (new < 2) {
1059                 Config_Error(LOG_WARNING,
1060                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
1061                              NGIRCd_ConfFile, Line);
1062                 return 2;
1063         }
1064         return new;
1065 }
1066
1067 /**
1068  * Output a warning messages if IDENT is configured but not compiled in.
1069  */
1070 static void
1071 WarnIdent(int UNUSED Line)
1072 {
1073 #ifndef IDENTAUTH
1074         if (Conf_Ident) {
1075                 /* user has enabled ident lookups explicitly, but ... */
1076                 Config_Error(LOG_WARNING,
1077                         "%s: line %d: \"Ident = yes\", but ngircd was built without IDENT support!",
1078                         NGIRCd_ConfFile, Line);
1079         }
1080 #endif
1081 }
1082
1083 /**
1084  * Output a warning messages if IPv6 is configured but not compiled in.
1085  */
1086 static void
1087 WarnIPv6(int UNUSED Line)
1088 {
1089 #ifndef WANT_IPV6
1090         if (Conf_ConnectIPv6) {
1091                 /* user has enabled IPv6 explicitly, but ... */
1092                 Config_Error(LOG_WARNING,
1093                         "%s: line %d: \"ConnectIPv6 = yes\", but ngircd was built without IPv6 support!",
1094                         NGIRCd_ConfFile, Line);
1095         }
1096 #endif
1097 }
1098
1099 /**
1100  * Output a warning messages if PAM is configured but not compiled in.
1101  */
1102 static void
1103 WarnPAM(int UNUSED Line)
1104 {
1105 #ifndef PAM
1106         if (Conf_PAM) {
1107                 Config_Error(LOG_WARNING,
1108                         "%s: line %d: \"PAM = yes\", but ngircd was built without PAM support!",
1109                         NGIRCd_ConfFile, Line);
1110         }
1111 #endif
1112 }
1113
1114 /**
1115  * Handle legacy "NoXXX" options in [GLOBAL] section.
1116  *
1117  * TODO: This function and support for "NoXXX" could be removed starting
1118  * with ngIRCd release 19 (one release after marking it "deprecated").
1119  *
1120  * @param Var   Variable name.
1121  * @param Arg   Argument string.
1122  * @returns     true if a NoXXX option has been processed; false otherwise.
1123  */
1124 static bool
1125 CheckLegacyNoOption(const char *Var, const char *Arg)
1126 {
1127         if(strcasecmp(Var, "NoDNS") == 0) {
1128                 Conf_DNS = !Check_ArgIsTrue( Arg );
1129                 return true;
1130         }
1131         if (strcasecmp(Var, "NoIdent") == 0) {
1132                 Conf_Ident = !Check_ArgIsTrue(Arg);
1133                 return true;
1134         }
1135         if(strcasecmp(Var, "NoPAM") == 0) {
1136                 Conf_PAM = !Check_ArgIsTrue(Arg);
1137                 return true;
1138         }
1139         return false;
1140 }
1141
1142 /**
1143  * Handle deprecated legacy options in [GLOBAL] section.
1144  *
1145  * TODO: This function and support for these options in the [Global] section
1146  * could be removed starting with ngIRCd release 19 (one release after
1147  * marking it "deprecated").
1148  *
1149  * @param Var   Variable name.
1150  * @param Arg   Argument string.
1151  * @returns     true if a legacy option has been processed; false otherwise.
1152  */
1153 static const char*
1154 CheckLegacyGlobalOption(int Line, char *Var, char *Arg)
1155 {
1156         if (strcasecmp(Var, "AllowRemoteOper") == 0
1157             || strcasecmp(Var, "ChrootDir") == 0
1158             || strcasecmp(Var, "ConnectIPv4") == 0
1159             || strcasecmp(Var, "ConnectIPv6") == 0
1160             || strcasecmp(Var, "OperCanUseMode") == 0
1161             || strcasecmp(Var, "OperServerMode") == 0
1162             || strcasecmp(Var, "PredefChannelsOnly") == 0
1163             || strcasecmp(Var, "SyslogFacility") == 0
1164             || strcasecmp(Var, "WebircPassword") == 0) {
1165                 Handle_OPTIONS(Line, Var, Arg);
1166                 return "[Options]";
1167         }
1168         if (strcasecmp(Var, "ConnectRetry") == 0
1169             || strcasecmp(Var, "MaxConnections") == 0
1170             || strcasecmp(Var, "MaxConnectionsIP") == 0
1171             || strcasecmp(Var, "MaxJoins") == 0
1172             || strcasecmp(Var, "MaxNickLength") == 0
1173             || strcasecmp(Var, "PingTimeout") == 0
1174             || strcasecmp(Var, "PongTimeout") == 0) {
1175                 Handle_LIMITS(Line, Var, Arg);
1176                 return "[Limits]";
1177         }
1178 #ifdef SSL_SUPPORT
1179         if (strcasecmp(Var, "SSLCertFile") == 0
1180             || strcasecmp(Var, "SSLDHFile") == 0
1181             || strcasecmp(Var, "SSLKeyFile") == 0
1182             || strcasecmp(Var, "SSLKeyFilePassword") == 0
1183             || strcasecmp(Var, "SSLPorts") == 0) {
1184                 Handle_SSL(Line, Var + 3, Arg);
1185                 return "[SSL]";
1186         }
1187 #endif
1188
1189         return NULL;
1190 }
1191
1192 /**
1193  * Strip "no" prefix of a string.
1194  *
1195  * TODO: This function and support for "NoXXX" should be removed starting
1196  * with ngIRCd release 19! (One release after marking it "deprecated").
1197  *
1198  * @param str   Pointer to input string starting with "no".
1199  * @returns     New pointer to string without "no" prefix.
1200  */
1201 static const char *
1202 NoNo(const char *str)
1203 {
1204         assert(strncasecmp("no", str, 2) == 0 && str[2]);
1205         return str + 2;
1206 }
1207
1208 /**
1209  * Invert "boolean" string.
1210  *
1211  * TODO: This function and support for "NoXXX" should be removed starting
1212  * with ngIRCd release 19! (One release after marking it "deprecated").
1213  *
1214  * @param arg   "Boolean" input string.
1215  * @returns     Pointer to inverted "boolean string".
1216  */
1217 static const char *
1218 InvertArg(const char *arg)
1219 {
1220         return yesno_to_str(!Check_ArgIsTrue(arg));
1221 }
1222
1223 /**
1224  * Handle variable in [Global] configuration section.
1225  *
1226  * @param Line  Line numer in configuration file.
1227  * @param Var   Variable name.
1228  * @param Arg   Variable argument.
1229  */
1230 static void
1231 Handle_GLOBAL( int Line, char *Var, char *Arg )
1232 {
1233         struct passwd *pwd;
1234         struct group *grp;
1235         size_t len;
1236         const char *section;
1237
1238         assert(Line > 0);
1239         assert(Var != NULL);
1240         assert(Arg != NULL);
1241
1242         if (strcasecmp(Var, "Name") == 0) {
1243                 len = strlcpy(Conf_ServerName, Arg, sizeof(Conf_ServerName));
1244                 if (len >= sizeof(Conf_ServerName))
1245                         Config_Error_TooLong(Line, Var);
1246                 return;
1247         }
1248         if (strcasecmp(Var, "AdminInfo1") == 0) {
1249                 len = strlcpy(Conf_ServerAdmin1, Arg, sizeof(Conf_ServerAdmin1));
1250                 if (len >= sizeof(Conf_ServerAdmin1))
1251                         Config_Error_TooLong(Line, Var);
1252                 return;
1253         }
1254         if (strcasecmp(Var, "AdminInfo2") == 0) {
1255                 len = strlcpy(Conf_ServerAdmin2, Arg, sizeof(Conf_ServerAdmin2));
1256                 if (len >= sizeof(Conf_ServerAdmin2))
1257                         Config_Error_TooLong(Line, Var);
1258                 return;
1259         }
1260         if (strcasecmp(Var, "AdminEMail") == 0) {
1261                 len = strlcpy(Conf_ServerAdminMail, Arg,
1262                         sizeof(Conf_ServerAdminMail));
1263                 if (len >= sizeof(Conf_ServerAdminMail))
1264                         Config_Error_TooLong(Line, Var);
1265                 return;
1266         }
1267         if (strcasecmp(Var, "Info") == 0) {
1268                 len = strlcpy(Conf_ServerInfo, Arg, sizeof(Conf_ServerInfo));
1269                 if (len >= sizeof(Conf_ServerInfo))
1270                         Config_Error_TooLong(Line, Var);
1271                 return;
1272         }
1273         if (strcasecmp(Var, "Listen") == 0) {
1274                 if (Conf_ListenAddress) {
1275                         Config_Error(LOG_ERR,
1276                                      "Multiple Listen= options, ignoring: %s",
1277                                      Arg);
1278                         return;
1279                 }
1280                 Conf_ListenAddress = strdup_warn(Arg);
1281                 /* If allocation fails, we're in trouble: we cannot ignore the
1282                  * error -- otherwise ngircd would listen on all interfaces. */
1283                 if (!Conf_ListenAddress) {
1284                         Config_Error(LOG_ALERT,
1285                                      "%s exiting due to fatal errors!",
1286                                      PACKAGE_NAME);
1287                         exit(1);
1288                 }
1289                 return;
1290         }
1291         if (strcasecmp(Var, "MotdFile") == 0) {
1292                 len = strlcpy(Conf_MotdFile, Arg, sizeof(Conf_MotdFile));
1293                 if (len >= sizeof(Conf_MotdFile))
1294                         Config_Error_TooLong(Line, Var);
1295                 return;
1296         }
1297         if (strcasecmp(Var, "MotdPhrase") == 0) {
1298                 len = strlen(Arg);
1299                 if (len == 0)
1300                         return;
1301                 if (len >= LINE_LEN) {
1302                         Config_Error_TooLong(Line, Var);
1303                         return;
1304                 }
1305                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1306                         Config_Error(LOG_WARNING,
1307                                      "%s, line %d: Could not append MotdPhrase: %s",
1308                                      NGIRCd_ConfFile, Line, strerror(errno));
1309                 Using_MotdFile = false;
1310                 return;
1311         }
1312         if(strcasecmp(Var, "Password") == 0) {
1313                 len = strlcpy(Conf_ServerPwd, Arg, sizeof(Conf_ServerPwd));
1314                 if (len >= sizeof(Conf_ServerPwd))
1315                         Config_Error_TooLong(Line, Var);
1316                 return;
1317         }
1318         if (strcasecmp(Var, "PidFile") == 0) {
1319                 len = strlcpy(Conf_PidFile, Arg, sizeof(Conf_PidFile));
1320                 if (len >= sizeof(Conf_PidFile))
1321                         Config_Error_TooLong(Line, Var);
1322                 return;
1323         }
1324         if (strcasecmp(Var, "Ports") == 0) {
1325                 ports_parse(&Conf_ListenPorts, Line, Arg);
1326                 return;
1327         }
1328         if (strcasecmp(Var, "ServerGID") == 0) {
1329                 grp = getgrnam(Arg);
1330                 if (grp)
1331                         Conf_GID = grp->gr_gid;
1332                 else {
1333                         Conf_GID = (unsigned int)atoi(Arg);
1334                         if (!Conf_GID && strcmp(Arg, "0"))
1335                                 Config_Error(LOG_WARNING,
1336                                              "%s, line %d: Value of \"%s\" is not a valid group name or ID!",
1337                                              NGIRCd_ConfFile, Line, Var);
1338                 }
1339                 return;
1340         }
1341         if (strcasecmp(Var, "ServerUID") == 0) {
1342                 pwd = getpwnam(Arg);
1343                 if (pwd)
1344                         Conf_UID = pwd->pw_uid;
1345                 else {
1346                         Conf_UID = (unsigned int)atoi(Arg);
1347                         if (!Conf_UID && strcmp(Arg, "0"))
1348                                 Config_Error(LOG_WARNING,
1349                                              "%s, line %d: Value of \"%s\" is not a valid user name or ID!",
1350                                              NGIRCd_ConfFile, Line, Var);
1351                 }
1352                 return;
1353         }
1354
1355         if (CheckLegacyNoOption(Var, Arg)) {
1356                 /* TODO: This function and support for "NoXXX" could be
1357                  * be removed starting with ngIRCd release 19 (one release
1358                  * after marking it "deprecated"). */
1359                 Config_Error(LOG_WARNING,
1360                              "%s, line %d (section \"Global\"): \"No\"-Prefix is deprecated, use \"%s = %s\" in [Options] section!",
1361                              NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1362                 if (strcasecmp(Var, "NoIdent") == 0)
1363                         WarnIdent(Line);
1364                 else if (strcasecmp(Var, "NoPam") == 0)
1365                         WarnPAM(Line);
1366                 return;
1367         }
1368         if ((section = CheckLegacyGlobalOption(Line, Var, Arg))) {
1369                 /** TODO: This function and support for these options in the
1370                  * [Global] section could be removed starting with ngIRCd
1371                  * release 19 (one release after marking it "deprecated"). */
1372                 if (strncasecmp(Var, "SSL", 3) == 0) {
1373                         Config_Error(LOG_WARNING,
1374                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s and rename to \"%s\"!",
1375                                      NGIRCd_ConfFile, Line, Var, section,
1376                                      Var + 3);
1377                 } else {
1378                         Config_Error(LOG_WARNING,
1379                                      "%s, line %d (section \"Global\"): \"%s\" is deprecated here, move it to %s!",
1380                                      NGIRCd_ConfFile, Line, Var, section);
1381                 }
1382                 return;
1383         }
1384
1385         Config_Error_Section(Line, Var, "Global");
1386 }
1387
1388 /**
1389  * Handle variable in [Limits] configuration section.
1390  *
1391  * @param Line  Line numer in configuration file.
1392  * @param Var   Variable name.
1393  * @param Arg   Variable argument.
1394  */
1395 static void
1396 Handle_LIMITS(int Line, char *Var, char *Arg)
1397 {
1398         assert(Line > 0);
1399         assert(Var != NULL);
1400         assert(Arg != NULL);
1401
1402         if (strcasecmp(Var, "ConnectRetry") == 0) {
1403                 Conf_ConnectRetry = atoi(Arg);
1404                 if (Conf_ConnectRetry < 5) {
1405                         Config_Error(LOG_WARNING,
1406                                      "%s, line %d: Value of \"ConnectRetry\" too low!",
1407                                      NGIRCd_ConfFile, Line);
1408                         Conf_ConnectRetry = 5;
1409                 }
1410                 return;
1411         }
1412         if (strcasecmp(Var, "MaxConnections") == 0) {
1413                 Conf_MaxConnections = atol(Arg);
1414                 if (!Conf_MaxConnections && strcmp(Arg, "0"))
1415                         Config_Error_NaN(Line, Var);
1416                 return;
1417         }
1418         if (strcasecmp(Var, "MaxConnectionsIP") == 0) {
1419                 Conf_MaxConnectionsIP = atoi(Arg);
1420                 if (!Conf_MaxConnectionsIP && strcmp(Arg, "0"))
1421                         Config_Error_NaN(Line, Var);
1422                 return;
1423         }
1424         if (strcasecmp(Var, "MaxJoins") == 0) {
1425                 Conf_MaxJoins = atoi(Arg);
1426                 if (!Conf_MaxJoins && strcmp(Arg, "0"))
1427                         Config_Error_NaN(Line, Var);
1428                 return;
1429         }
1430         if (strcasecmp(Var, "MaxNickLength") == 0) {
1431                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1432                 return;
1433         }
1434         if (strcasecmp(Var, "PingTimeout") == 0) {
1435                 Conf_PingTimeout = atoi(Arg);
1436                 if (Conf_PingTimeout < 5) {
1437                         Config_Error(LOG_WARNING,
1438                                      "%s, line %d: Value of \"PingTimeout\" too low!",
1439                                      NGIRCd_ConfFile, Line);
1440                         Conf_PingTimeout = 5;
1441                 }
1442                 return;
1443         }
1444         if (strcasecmp(Var, "PongTimeout") == 0) {
1445                 Conf_PongTimeout = atoi(Arg);
1446                 if (Conf_PongTimeout < 5) {
1447                         Config_Error(LOG_WARNING,
1448                                      "%s, line %d: Value of \"PongTimeout\" too low!",
1449                                      NGIRCd_ConfFile, Line);
1450                         Conf_PongTimeout = 5;
1451                 }
1452                 return;
1453         }
1454
1455         Config_Error_Section(Line, Var, "Limits");
1456 }
1457
1458 /**
1459  * Handle variable in [Options] configuration section.
1460  *
1461  * @param Line  Line numer in configuration file.
1462  * @param Var   Variable name.
1463  * @param Arg   Variable argument.
1464  */
1465 static void
1466 Handle_OPTIONS(int Line, char *Var, char *Arg)
1467 {
1468         size_t len;
1469
1470         assert(Line > 0);
1471         assert(Var != NULL);
1472         assert(Arg != NULL);
1473
1474         if (strcasecmp(Var, "AllowRemoteOper") == 0) {
1475                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1476                 return;
1477         }
1478         if (strcasecmp(Var, "ChrootDir") == 0) {
1479                 len = strlcpy(Conf_Chroot, Arg, sizeof(Conf_Chroot));
1480                 if (len >= sizeof(Conf_Chroot))
1481                         Config_Error_TooLong(Line, Var);
1482                 return;
1483         }
1484         if (strcasecmp(Var, "CloakHost") == 0) {
1485                 len = strlcpy(Conf_CloakHost, Arg, sizeof(Conf_CloakHost));
1486                 if (len >= sizeof(Conf_CloakHost))
1487                         Config_Error_TooLong(Line, Var);
1488                 return;
1489         }
1490         if (strcasecmp(Var, "CloakHostModeX") == 0) {
1491                 len = strlcpy(Conf_CloakHostModeX, Arg, sizeof(Conf_CloakHostModeX));
1492                 if (len >= sizeof(Conf_CloakHostModeX))
1493                         Config_Error_TooLong(Line, Var);
1494                 return;
1495         }
1496         if (strcasecmp(Var, "CloakHostSalt") == 0) {
1497                 len = strlcpy(Conf_CloakHostSalt, Arg, sizeof(Conf_CloakHostSalt));
1498                 if (len >= sizeof(Conf_CloakHostSalt))
1499                         Config_Error_TooLong(Line, Var);
1500                 return;
1501         }
1502         if (strcasecmp(Var, "CloakUserToNick") == 0) {
1503                 Conf_CloakUserToNick = Check_ArgIsTrue(Arg);
1504                 return;
1505         }
1506         if (strcasecmp(Var, "ConnectIPv6") == 0) {
1507                 Conf_ConnectIPv6 = Check_ArgIsTrue(Arg);
1508                 WarnIPv6(Line);
1509                 return;
1510         }
1511         if (strcasecmp(Var, "ConnectIPv4") == 0) {
1512                 Conf_ConnectIPv4 = Check_ArgIsTrue(Arg);
1513                 return;
1514         }
1515         if (strcasecmp(Var, "DNS") == 0) {
1516                 Conf_DNS = Check_ArgIsTrue(Arg);
1517                 return;
1518         }
1519         if (strcasecmp(Var, "Ident") == 0) {
1520                 Conf_Ident = Check_ArgIsTrue(Arg);
1521                 WarnIdent(Line);
1522                 return;
1523         }
1524         if (strcasecmp(Var, "MorePrivacy") == 0) {
1525                 Conf_MorePrivacy = Check_ArgIsTrue(Arg);
1526                 return;
1527         }
1528         if (strcasecmp(Var, "NoticeAuth") == 0) {
1529                 Conf_NoticeAuth = Check_ArgIsTrue(Arg);
1530                 return;
1531         }
1532         if (strcasecmp(Var, "OperCanUseMode") == 0) {
1533                 Conf_OperCanMode = Check_ArgIsTrue(Arg);
1534                 return;
1535         }
1536         if (strcasecmp(Var, "OperServerMode") == 0) {
1537                 Conf_OperServerMode = Check_ArgIsTrue(Arg);
1538                 return;
1539         }
1540         if (strcasecmp(Var, "PAM") == 0) {
1541                 Conf_PAM = Check_ArgIsTrue(Arg);
1542                 WarnPAM(Line);
1543                 return;
1544         }
1545         if (strcasecmp(Var, "PAMIsOptional") == 0 ) {
1546                 Conf_PAMIsOptional = Check_ArgIsTrue(Arg);
1547                 return;
1548         }
1549         if (strcasecmp(Var, "PredefChannelsOnly") == 0) {
1550                 Conf_PredefChannelsOnly = Check_ArgIsTrue(Arg);
1551                 return;
1552         }
1553 #ifndef STRICT_RFC
1554         if (strcasecmp(Var, "RequireAuthPing") == 0) {
1555                 Conf_AuthPing = Check_ArgIsTrue(Arg);
1556                 return;
1557         }
1558 #endif
1559         if (strcasecmp(Var, "ScrubCTCP") == 0) {
1560                 Conf_ScrubCTCP = Check_ArgIsTrue(Arg);
1561                 return;
1562         }
1563 #ifdef SYSLOG
1564         if (strcasecmp(Var, "SyslogFacility") == 0) {
1565                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1566                                                            Conf_SyslogFacility);
1567                 return;
1568         }
1569 #endif
1570         if (strcasecmp(Var, "WebircPassword") == 0) {
1571                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
1572                 if (len >= sizeof(Conf_WebircPwd))
1573                         Config_Error_TooLong(Line, Var);
1574                 return;
1575         }
1576
1577         Config_Error_Section(Line, Var, "Options");
1578 }
1579
1580 #ifdef SSL_SUPPORT
1581
1582 /**
1583  * Handle variable in [SSL] configuration section.
1584  *
1585  * @param Line  Line numer in configuration file.
1586  * @param Var   Variable name.
1587  * @param Arg   Variable argument.
1588  */
1589 static void
1590 Handle_SSL(int Line, char *Var, char *Arg)
1591 {
1592         assert(Line > 0);
1593         assert(Var != NULL);
1594         assert(Arg != NULL);
1595
1596         if (strcasecmp(Var, "CertFile") == 0) {
1597                 assert(Conf_SSLOptions.CertFile == NULL);
1598                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1599                 return;
1600         }
1601         if (strcasecmp(Var, "DHFile") == 0) {
1602                 assert(Conf_SSLOptions.DHFile == NULL);
1603                 Conf_SSLOptions.DHFile = strdup_warn(Arg);
1604                 return;
1605         }
1606         if (strcasecmp(Var, "KeyFile") == 0) {
1607                 assert(Conf_SSLOptions.KeyFile == NULL);
1608                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1609                 return;
1610         }
1611         if (strcasecmp(Var, "KeyFilePassword") == 0) {
1612                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1613                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1614                         Config_Error(LOG_ERR,
1615                                      "%s, line %d (section \"SSL\"): Could not copy %s: %s!",
1616                                      NGIRCd_ConfFile, Line, Var,
1617                                      strerror(errno));
1618                 return;
1619         }
1620         if (strcasecmp(Var, "Ports") == 0) {
1621                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1622                 return;
1623         }
1624
1625         Config_Error_Section(Line, Var, "SSL");
1626 }
1627
1628 #endif
1629
1630 /**
1631  * Handle variable in [Operator] configuration section.
1632  *
1633  * @param Line  Line numer in configuration file.
1634  * @param Var   Variable name.
1635  * @param Arg   Variable argument.
1636  */
1637 static void
1638 Handle_OPERATOR( int Line, char *Var, char *Arg )
1639 {
1640         size_t len;
1641         struct Conf_Oper *op;
1642
1643         assert( Line > 0 );
1644         assert( Var != NULL );
1645         assert( Arg != NULL );
1646
1647         op = array_get(&Conf_Opers, sizeof(*op),
1648                          array_length(&Conf_Opers, sizeof(*op)) - 1);
1649         if (!op)
1650                 return;
1651
1652         if (strcasecmp(Var, "Name") == 0) {
1653                 /* Name of IRC operator */
1654                 len = strlcpy(op->name, Arg, sizeof(op->name));
1655                 if (len >= sizeof(op->name))
1656                                 Config_Error_TooLong(Line, Var);
1657                 return;
1658         }
1659         if (strcasecmp(Var, "Password") == 0) {
1660                 /* Password of IRC operator */
1661                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1662                 if (len >= sizeof(op->pwd))
1663                                 Config_Error_TooLong(Line, Var);
1664                 return;
1665         }
1666         if (strcasecmp(Var, "Mask") == 0) {
1667                 if (op->mask)
1668                         return; /* Hostname already configured */
1669                 op->mask = strdup_warn( Arg );
1670                 return;
1671         }
1672
1673         Config_Error_Section(Line, Var, "Operator");
1674 }
1675
1676 /**
1677  * Handle variable in [Server] configuration section.
1678  *
1679  * @param Line  Line numer in configuration file.
1680  * @param Var   Variable name.
1681  * @param Arg   Variable argument.
1682  */
1683 static void
1684 Handle_SERVER( int Line, char *Var, char *Arg )
1685 {
1686         long port;
1687         size_t len;
1688
1689         assert( Line > 0 );
1690         assert( Var != NULL );
1691         assert( Arg != NULL );
1692
1693         /* Ignore server block if no space is left in server configuration structure */
1694         if( New_Server_Idx <= NONE ) return;
1695
1696         if( strcasecmp( Var, "Host" ) == 0 ) {
1697                 /* Hostname of the server */
1698                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1699                 if (len >= sizeof( New_Server.host ))
1700                         Config_Error_TooLong ( Line, Var );
1701                 return;
1702         }
1703         if( strcasecmp( Var, "Name" ) == 0 ) {
1704                 /* Name of the server ("Nick"/"ID") */
1705                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1706                 if (len >= sizeof( New_Server.name ))
1707                         Config_Error_TooLong( Line, Var );
1708                 return;
1709         }
1710         if (strcasecmp(Var, "Bind") == 0) {
1711                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1712                         return;
1713
1714                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1715                                 NGIRCd_ConfFile, Line, Arg);
1716                 return;
1717         }
1718         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1719                 /* Password of this server which is sent to the peer */
1720                 if (*Arg == ':') {
1721                         Config_Error(LOG_ERR,
1722                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1723                                                                                 NGIRCd_ConfFile, Line);
1724                 }
1725                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1726                 if (len >= sizeof( New_Server.pwd_in ))
1727                         Config_Error_TooLong( Line, Var );
1728                 return;
1729         }
1730         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1731                 /* Passwort of the peer which must be received */
1732                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1733                 if (len >= sizeof( New_Server.pwd_out ))
1734                         Config_Error_TooLong( Line, Var );
1735                 return;
1736         }
1737         if( strcasecmp( Var, "Port" ) == 0 ) {
1738                 /* Port to which this server should connect */
1739                 port = atol( Arg );
1740                 if (port >= 0 && port < 0xFFFF)
1741                         New_Server.port = (UINT16)port;
1742                 else
1743                         Config_Error(LOG_ERR,
1744                                 "%s, line %d (section \"Server\"): Illegal port number %ld!",
1745                                 NGIRCd_ConfFile, Line, port );
1746                 return;
1747         }
1748 #ifdef SSL_SUPPORT
1749         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1750                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1751                 return;
1752         }
1753 #endif
1754         if( strcasecmp( Var, "Group" ) == 0 ) {
1755                 /* Server group */
1756                 New_Server.group = atoi( Arg );
1757                 if (!New_Server.group && strcmp(Arg, "0"))
1758                         Config_Error_NaN(Line, Var);
1759                 return;
1760         }
1761         if( strcasecmp( Var, "Passive" ) == 0 ) {
1762                 if (Check_ArgIsTrue(Arg))
1763                         New_Server.flags |= CONF_SFLAG_DISABLED;
1764                 return;
1765         }
1766         if (strcasecmp(Var, "ServiceMask") == 0) {
1767                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1768                               sizeof(New_Server.svs_mask));
1769                 if (len >= sizeof(New_Server.svs_mask))
1770                         Config_Error_TooLong(Line, Var);
1771                 return;
1772         }
1773
1774         Config_Error_Section(Line, Var, "Server");
1775 }
1776
1777 /**
1778  * Copy channel name into channel structure.
1779  *
1780  * If the channel name is not valid because of a missing prefix ('#', '&'),
1781  * a default prefix of '#' will be added.
1782  *
1783  * @param new_chan      New already allocated channel structure.
1784  * @param name          Name of the new channel.
1785  * @returns             true on success, false otherwise.
1786  */
1787 static bool
1788 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1789 {
1790         size_t size = sizeof(new_chan->name);
1791         char *dest = new_chan->name;
1792
1793         if (!Channel_IsValidName(name)) {
1794                 /*
1795                  * maybe user forgot to add a '#'.
1796                  * This is only here for user convenience.
1797                  */
1798                 *dest = '#';
1799                 --size;
1800                 ++dest;
1801         }
1802         return size > strlcpy(dest, name, size);
1803 }
1804
1805 /**
1806  * Handle variable in [Channel] configuration section.
1807  *
1808  * @param Line  Line numer in configuration file.
1809  * @param Var   Variable name.
1810  * @param Arg   Variable argument.
1811  */
1812 static void
1813 Handle_CHANNEL(int Line, char *Var, char *Arg)
1814 {
1815         size_t len;
1816         struct Conf_Channel *chan;
1817
1818         assert( Line > 0 );
1819         assert( Var != NULL );
1820         assert( Arg != NULL );
1821
1822         chan = array_get(&Conf_Channels, sizeof(*chan),
1823                          array_length(&Conf_Channels, sizeof(*chan)) - 1);
1824         if (!chan)
1825                 return;
1826
1827         if (strcasecmp(Var, "Name") == 0) {
1828                 if (!Handle_Channelname(chan, Arg))
1829                         Config_Error_TooLong(Line, Var);
1830                 return;
1831         }
1832         if (strcasecmp(Var, "Modes") == 0) {
1833                 /* Initial modes */
1834                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1835                 if (len >= sizeof(chan->modes))
1836                         Config_Error_TooLong( Line, Var );
1837                 return;
1838         }
1839         if( strcasecmp( Var, "Topic" ) == 0 ) {
1840                 /* Initial topic */
1841                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1842                 if (len >= sizeof(chan->topic))
1843                         Config_Error_TooLong( Line, Var );
1844                 return;
1845         }
1846         if( strcasecmp( Var, "Key" ) == 0 ) {
1847                 /* Initial Channel Key (mode k) */
1848                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1849                 if (len >= sizeof(chan->key))
1850                         Config_Error_TooLong(Line, Var);
1851                 return;
1852         }
1853         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1854                 /* maximum user limit, mode l */
1855                 chan->maxusers = (unsigned long) atol(Arg);
1856                 if (!chan->maxusers && strcmp(Arg, "0"))
1857                         Config_Error_NaN(Line, Var);
1858                 return;
1859         }
1860         if (strcasecmp(Var, "KeyFile") == 0) {
1861                 /* channel keys */
1862                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1863                 if (len >= sizeof(chan->keyfile))
1864                         Config_Error_TooLong(Line, Var);
1865                 return;
1866         }
1867
1868         Config_Error_Section(Line, Var, "Channel");
1869 }
1870
1871 /**
1872  * Validate server configuration.
1873  *
1874  * Please note that this function uses exit(1) on fatal errors and therefore
1875  * can result in ngIRCd terminating!
1876  *
1877  * @param Configtest    true if the daemon has been called with "--configtest".
1878  * @param Rehash        true if re-reading configuration on runtime.
1879  * @returns             true if configuration is valid.
1880  */
1881 static bool
1882 Validate_Config(bool Configtest, bool Rehash)
1883 {
1884         /* Validate configuration settings. */
1885
1886 #ifdef DEBUG
1887         int i, servers, servers_once;
1888 #endif
1889         bool config_valid = true;
1890         char *ptr;
1891
1892         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1893         ptr = Conf_ServerName;
1894         do {
1895                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1896                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1897                 if (*ptr >= '0' && *ptr <= '9') continue;
1898                 if (ptr > Conf_ServerName) {
1899                         if (*ptr == '.' || *ptr == '-')
1900                                 continue;
1901                 }
1902                 Conf_ServerName[0] = '\0';
1903                 break;
1904         } while (*(++ptr));
1905
1906         if (!Conf_ServerName[0]) {
1907                 /* No server name configured! */
1908                 config_valid = false;
1909                 Config_Error(LOG_ALERT,
1910                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1911                              NGIRCd_ConfFile);
1912                 if (!Configtest && !Rehash) {
1913                         Config_Error(LOG_ALERT,
1914                                      "%s exiting due to fatal errors!",
1915                                      PACKAGE_NAME);
1916                         exit(1);
1917                 }
1918         }
1919
1920         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1921                 /* No dot in server name! */
1922                 config_valid = false;
1923                 Config_Error(LOG_ALERT,
1924                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1925                              NGIRCd_ConfFile);
1926                 if (!Configtest) {
1927                         Config_Error(LOG_ALERT,
1928                                      "%s exiting due to fatal errors!",
1929                                      PACKAGE_NAME);
1930                         exit(1);
1931                 }
1932         }
1933
1934 #ifdef STRICT_RFC
1935         if (!Conf_ServerAdminMail[0]) {
1936                 /* No administrative contact configured! */
1937                 config_valid = false;
1938                 Config_Error(LOG_ALERT,
1939                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1940                              NGIRCd_ConfFile);
1941                 if (!Configtest) {
1942                         Config_Error(LOG_ALERT,
1943                                      "%s exiting due to fatal errors!",
1944                                      PACKAGE_NAME);
1945                         exit(1);
1946                 }
1947         }
1948 #endif
1949
1950         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1951             && !Conf_ServerAdminMail[0]) {
1952                 /* No administrative information configured! */
1953                 Config_Error(LOG_WARNING,
1954                              "No administrative information configured but required by RFC!");
1955         }
1956
1957 #ifdef PAM
1958         if (Conf_ServerPwd[0])
1959                 Config_Error(LOG_ERR,
1960                              "This server uses PAM, \"Password\" in [Global] section will be ignored!");
1961 #endif
1962
1963 #ifdef DEBUG
1964         servers = servers_once = 0;
1965         for (i = 0; i < MAX_SERVERS; i++) {
1966                 if (Conf_Server[i].name[0]) {
1967                         servers++;
1968                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1969                                 servers_once++;
1970                 }
1971         }
1972         Log(LOG_DEBUG,
1973             "Configuration: Operators=%ld, Servers=%d[%d], Channels=%ld",
1974             array_length(&Conf_Opers, sizeof(struct Conf_Oper)),
1975             servers, servers_once,
1976             array_length(&Conf_Channels, sizeof(struct Conf_Channel)));
1977 #endif
1978
1979         return config_valid;
1980 }
1981
1982 /**
1983  * Output "line too long" warning.
1984  *
1985  * @param Line  Line number in configuration file.
1986  * @param Item  Affected variable name.
1987  */
1988 static void
1989 Config_Error_TooLong ( const int Line, const char *Item )
1990 {
1991         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
1992 }
1993
1994 /**
1995  * Output "unknown variable" warning.
1996  *
1997  * @param Line          Line number in configuration file.
1998  * @param Item          Affected variable name.
1999  * @param Section       Section name.
2000  */
2001 static void
2002 Config_Error_Section(const int Line, const char *Item, const char *Section)
2003 {
2004         Config_Error(LOG_ERR, "%s, line %d (section \"%s\"): Unknown variable \"%s\"!",
2005                      NGIRCd_ConfFile, Line, Section, Item);
2006 }
2007
2008 /**
2009  * Output "not a number" warning.
2010  *
2011  * @param Line  Line number in configuration file.
2012  * @param Item  Affected variable name.
2013  */
2014 static void
2015 Config_Error_NaN( const int Line, const char *Item )
2016 {
2017         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
2018                                                 NGIRCd_ConfFile, Line, Item );
2019 }
2020
2021 /**
2022  * Output configuration error to console and/or logfile.
2023  *
2024  * On runtime, the normal log functions of the daemon are used. But when
2025  * testing the configuration ("--configtest"), all messages go directly
2026  * to the console.
2027  *
2028  * @param Level         Severity level of the message.
2029  * @param Format        Format string; see printf() function.
2030  */
2031 #ifdef PROTOTYPES
2032 static void Config_Error( const int Level, const char *Format, ... )
2033 #else
2034 static void Config_Error( Level, Format, va_alist )
2035 const int Level;
2036 const char *Format;
2037 va_dcl
2038 #endif
2039 {
2040         char msg[MAX_LOG_MSG_LEN];
2041         va_list ap;
2042
2043         assert( Format != NULL );
2044
2045 #ifdef PROTOTYPES
2046         va_start( ap, Format );
2047 #else
2048         va_start( ap );
2049 #endif
2050         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
2051         va_end( ap );
2052
2053         if (!Use_Log) {
2054                 if (Level <= LOG_WARNING)
2055                         printf(" - %s\n", msg);
2056                 else
2057                         puts(msg);
2058         } else
2059                 Log(Level, "%s", msg);
2060 }
2061
2062 #ifdef DEBUG
2063
2064 /**
2065  * Dump internal state of the "configuration module".
2066  */
2067 GLOBAL void
2068 Conf_DebugDump(void)
2069 {
2070         int i;
2071
2072         Log(LOG_DEBUG, "Configured servers:");
2073         for (i = 0; i < MAX_SERVERS; i++) {
2074                 if (! Conf_Server[i].name[0])
2075                         continue;
2076                 Log(LOG_DEBUG,
2077                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
2078                     Conf_Server[i].name, Conf_Server[i].host,
2079                     Conf_Server[i].port, Conf_Server[i].lasttry,
2080                     Conf_Server[i].group, Conf_Server[i].flags,
2081                     Conf_Server[i].conn_id);
2082         }
2083 }
2084
2085 #endif
2086
2087 /**
2088  * Initialize server configuration structur to default values.
2089  *
2090  * @param Server        Pointer to server structure to initialize.
2091  */
2092 static void
2093 Init_Server_Struct( CONF_SERVER *Server )
2094 {
2095         assert( Server != NULL );
2096
2097         memset( Server, 0, sizeof (CONF_SERVER) );
2098
2099         Server->group = NONE;
2100         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
2101
2102         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
2103
2104         Proc_InitStruct(&Server->res_stat);
2105         Server->conn_id = NONE;
2106         memset(&Server->bind_addr, 0, sizeof(Server->bind_addr));
2107 }
2108
2109 /* -eof- */