src/ngircd/conf.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
   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  * Configuration management (reading, parsing & validation)
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <errno.h>
  20 #ifdef PROTOTYPES
  21 #       include <stdarg.h>
  22 #else
  23 #       include <varargs.h>
  24 #endif
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <strings.h>
  29 #include <unistd.h>
  30 #include <pwd.h>
  31 #include <grp.h>
  32 #include <sys/types.h>
  33 #include <unistd.h>
  34
  35 #ifdef HAVE_CTYPE_H
  36 # include <ctype.h>
  37 #endif
  38
  39 #include "array.h"
  40 #include "ngircd.h"
  41 #include "conn.h"
  42 #include "channel.h"
  43 #include "defines.h"
  44 #include "log.h"
  45 #include "match.h"
  46 #include "tool.h"
  47
  48 #include "exp.h"
  49 #include "conf.h"
  50
  51
  52 static bool Use_Log = true, Using_MotdFile = true;
  53 static CONF_SERVER New_Server;
  54 static int New_Server_Idx;
  55
  56 static size_t Conf_Oper_Count;
  57 static size_t Conf_Channel_Count;
  58 static char Conf_MotdFile[FNAME_LEN];
  59
  60 static void Set_Defaults PARAMS(( bool InitServers ));
  61 static bool Read_Config PARAMS(( bool ngircd_starting ));
  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_FEATURES PARAMS(( int Line, char *Var, char *Arg ));
  66 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
  67 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
  68 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
  69
  70 static void Config_Error PARAMS(( const int Level, const char *Format, ... ));
  71
  72 static void Config_Error_NaN PARAMS(( const int LINE, const char *Value ));
  73 static void Config_Error_TooLong PARAMS(( const int LINE, const char *Value ));
  74
  75 static void Init_Server_Struct PARAMS(( CONF_SERVER *Server ));
  76
  77 #ifdef WANT_IPV6
  78 #define DEFAULT_LISTEN_ADDRSTR "::,0.0.0.0"
  79 #else
  80 #define DEFAULT_LISTEN_ADDRSTR "0.0.0.0"
  81 #endif
  82
  83 #ifdef SSL_SUPPORT
  84 struct SSLOptions Conf_SSLOptions;
  85
  86 static void
  87 ConfSSL_Init(void)
  88 {
  89         free(Conf_SSLOptions.KeyFile);
  90         Conf_SSLOptions.KeyFile = NULL;
  91
  92         free(Conf_SSLOptions.CertFile);
  93         Conf_SSLOptions.CertFile = NULL;
  94
  95         free(Conf_SSLOptions.DHFile);
  96         Conf_SSLOptions.DHFile = NULL;
  97         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
  98 }
  99
 100 static bool
 101 ssl_print_configvar(const char *name, const char *file)
 102 {
 103         FILE *fp;
 104
 105         if (!file) {
 106                 printf("  %s =\n", name);
 107                 return true;
 108         }
 109
 110         fp = fopen(file, "r");
 111         if (fp)
 112                 fclose(fp);
 113         else
 114                 fprintf(stderr, "ERROR: %s \"%s\": %s\n",
 115                         name, file, strerror(errno));
 116
 117         printf("  %s = %s\n", name, file);
 118         return fp != NULL;
 119 }
 120
 121 static bool
 122 ConfSSL_Puts(void)
 123 {
 124         bool ret;
 125
 126         ret = ssl_print_configvar("SSLKeyFile", Conf_SSLOptions.KeyFile);
 127
 128         if (!ssl_print_configvar("SSLCertFile", Conf_SSLOptions.CertFile))
 129                 ret = false;
 130
 131         if (!ssl_print_configvar("SSLDHFile", Conf_SSLOptions.DHFile))
 132                 ret = false;
 133
 134         if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
 135                 puts("  SSLKeyFilePassword = <secret>");
 136
 137         array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
 138
 139         return ret;
 140 }
 141 #endif
 142
 143 static char *
 144 strdup_warn(const char *str)
 145 {
 146         char *ptr = strdup(str);
 147         if (!ptr)
 148                 Config_Error(LOG_ERR, "Could not allocate mem for string: %s", str);
 149         return ptr;
 150 }
 151
 152
 153 static void
 154 ports_puts(array *a)
 155 {
 156         size_t len;
 157         UINT16 *ports;
 158         len = array_length(a, sizeof(UINT16));
 159         if (len--) {
 160                 ports = (UINT16*) array_start(a);
 161                 printf("%u", (unsigned int) *ports);
 162                 while (len--) {
 163                         ports++;
 164                         printf(", %u", (unsigned int) *ports);
 165                 }
 166         }
 167         putc('\n', stdout);
 168 }
 169
 170
 171 static void
 172 ports_parse(array *a, int Line, char *Arg)
 173 {
 174         char *ptr;
 175         int port;
 176         UINT16 port16;
 177
 178         array_trunc(a);
 179
 180         /* Ports on that the server should listen. More port numbers
 181          * must be separated by "," */
 182         ptr = strtok( Arg, "," );
 183         while (ptr) {
 184                 ngt_TrimStr(ptr);
 185                 port = atoi(ptr);
 186                 if (port > 0 && port < 0xFFFF) {
 187                         port16 = (UINT16) port;
 188                         if (!array_catb(a, (char*)&port16, sizeof port16))
 189                                 Config_Error(LOG_ERR, "%s, line %d Could not add port number %ld: %s",
 190                                                         NGIRCd_ConfFile, Line, port, strerror(errno));
 191                 } else {
 192                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Illegal port number %ld!",
 193                                                                         NGIRCd_ConfFile, Line, port );
 194                 }
 195
 196                 ptr = strtok( NULL, "," );
 197         }
 198 }
 199
 200
 201 GLOBAL void
 202 Conf_Init( void )
 203 {
 204         Read_Config( true );
 205         Validate_Config(false, false);
 206 } /* Config_Init */
 207
 208
 209 GLOBAL bool
 210 Conf_Rehash( void )
 211 {
 212         if (!Read_Config(false))
 213                 return false;
 214         Validate_Config(false, true);
 215
 216         /* Update CLIENT structure of local server */
 217         Client_SetInfo(Client_ThisServer(), Conf_ServerInfo);
 218         return true;
 219 } /* Config_Rehash */
 220
 221
 222 static const char*
 223 yesno_to_str(int boolean_value)
 224 {
 225         if (boolean_value)
 226                 return "yes";
 227         return "no";
 228 }
 229
 230
 231 static void
 232 opers_free(void)
 233 {
 234         struct Conf_Oper *op;
 235         size_t len;
 236
 237         len = array_length(&Conf_Opers, sizeof(*op));
 238         op = array_start(&Conf_Opers);
 239         while (len--) {
 240                 free(op->mask);
 241                 op++;
 242         }
 243         array_free(&Conf_Opers);
 244 }
 245
 246 static void
 247 opers_puts(void)
 248 {
 249         struct Conf_Oper *op;
 250         size_t len;
 251
 252         len = array_length(&Conf_Opers, sizeof(*op));
 253         op = array_start(&Conf_Opers);
 254         while (len--) {
 255                 assert(op->name[0]);
 256
 257                 puts("[OPERATOR]");
 258                 printf("  Name = %s\n", op->name);
 259                 printf("  Password = %s\n", op->pwd);
 260                 printf("  Mask = %s\n\n", op->mask ? op->mask : "");
 261                 op++;
 262         }
 263 }
 264
 265
 266 GLOBAL int
 267 Conf_Test( void )
 268 {
 269         /* Read configuration, validate and output it. */
 270
 271         struct passwd *pwd;
 272         struct group *grp;
 273         unsigned int i;
 274         bool config_valid;
 275         size_t predef_channel_count;
 276         struct Conf_Channel *predef_chan;
 277
 278         Use_Log = false;
 279
 280         if (! Read_Config(true))
 281                 return 1;
 282
 283         config_valid = Validate_Config(true, false);
 284
 285         /* If stdin and stdout ("you can read our nice message and we can
 286          * read in your keypress") are valid tty's, wait for a key: */
 287         if( isatty( fileno( stdin )) && isatty( fileno( stdout ))) {
 288                 puts( "OK, press enter to see a dump of your service configuration ..." );
 289                 getchar( );
 290         } else {
 291                 puts( "Ok, dump of your server configuration follows:\n" );
 292         }
 293
 294         puts( "[GLOBAL]" );
 295         printf("  Name = %s\n", Conf_ServerName);
 296         printf("  Info = %s\n", Conf_ServerInfo);
 297 #ifndef PAM
 298         printf("  Password = %s\n", Conf_ServerPwd);
 299 #endif
 300         printf("  WebircPassword = %s\n", Conf_WebircPwd);
 301         printf("  AdminInfo1 = %s\n", Conf_ServerAdmin1);
 302         printf("  AdminInfo2 = %s\n", Conf_ServerAdmin2);
 303         printf("  AdminEMail = %s\n", Conf_ServerAdminMail);
 304         if (Using_MotdFile) {
 305                 printf("  MotdFile = %s\n", Conf_MotdFile);
 306                 printf("  MotdPhrase =\n");
 307         } else {
 308                 printf("  MotdFile = \n");
 309                 printf("  MotdPhrase = %s\n", array_bytes(&Conf_Motd)
 310                        ? (const char*) array_start(&Conf_Motd) : "");
 311         }
 312         printf("  ChrootDir = %s\n", Conf_Chroot);
 313         printf("  PidFile = %s\n", Conf_PidFile);
 314         printf("  Listen = %s\n", Conf_ListenAddress);
 315         fputs("  Ports = ", stdout);
 316         ports_puts(&Conf_ListenPorts);
 317 #ifdef SSL_SUPPORT
 318         fputs("  SSLPorts = ", stdout);
 319         ports_puts(&Conf_SSLOptions.ListenPorts);
 320         if (!ConfSSL_Puts())
 321                 config_valid = false;
 322 #endif
 323
 324         pwd = getpwuid(Conf_UID);
 325         if (pwd)
 326                 printf("  ServerUID = %s\n", pwd->pw_name);
 327         else
 328                 printf("  ServerUID = %ld\n", (long)Conf_UID);
 329         grp = getgrgid(Conf_GID);
 330         if (grp)
 331                 printf("  ServerGID = %s\n", grp->gr_name);
 332         else
 333                 printf("  ServerGID = %ld\n", (long)Conf_GID);
 334 #ifdef SYSLOG
 335         printf("  SyslogFacility = %s\n",
 336                ngt_SyslogFacilityName(Conf_SyslogFacility));
 337 #endif
 338         printf("  PingTimeout = %d\n", Conf_PingTimeout);
 339         printf("  PongTimeout = %d\n", Conf_PongTimeout);
 340         printf("  ConnectRetry = %d\n", Conf_ConnectRetry);
 341         printf("  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
 342         printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 343         printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 344         printf("  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
 345 #ifdef WANT_IPV6
 346         printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 347         printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
 348 #endif
 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\n", Conf_MaxNickLength - 1);
 353
 354         puts("[FEATURES]");
 355         printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 356         printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 357         printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
 358         printf("  ZeroConf = %s\n", yesno_to_str(Conf_ZeroConf));
 359         puts("");
 360
 361         opers_puts();
 362
 363         for( i = 0; i < MAX_SERVERS; i++ ) {
 364                 if( ! Conf_Server[i].name[0] ) continue;
 365
 366                 /* Valid "Server" section */
 367                 puts( "[SERVER]" );
 368                 printf( "  Name = %s\n", Conf_Server[i].name );
 369                 printf( "  Host = %s\n", Conf_Server[i].host );
 370                 printf( "  Port = %u\n", (unsigned int)Conf_Server[i].port );
 371 #ifdef SSL_SUPPORT
 372                 printf( "  SSLConnect = %s\n", Conf_Server[i].SSLConnect?"yes":"no");
 373 #endif
 374                 printf( "  MyPassword = %s\n", Conf_Server[i].pwd_in );
 375                 printf( "  PeerPassword = %s\n", Conf_Server[i].pwd_out );
 376                 printf( "  ServiceMask = %s\n", Conf_Server[i].svs_mask);
 377                 printf( "  Group = %d\n", Conf_Server[i].group );
 378                 printf( "  Passive = %s\n\n", Conf_Server[i].flags & CONF_SFLAG_DISABLED ? "yes" : "no");
 379         }
 380
 381         predef_channel_count = array_length(&Conf_Channels, sizeof(*predef_chan));
 382         predef_chan = array_start(&Conf_Channels);
 383
 384         for (i = 0; i < predef_channel_count; i++, predef_chan++) {
 385                 if (!predef_chan->name[0])
 386                         continue;
 387
 388                 /* Valid "Channel" section */
 389                 puts( "[CHANNEL]" );
 390                 printf("  Name = %s\n", predef_chan->name);
 391                 printf("  Modes = %s\n", predef_chan->modes);
 392                 printf("  Key = %s\n", predef_chan->key);
 393                 printf("  MaxUsers = %lu\n", predef_chan->maxusers);
 394                 printf("  Topic = %s\n", predef_chan->topic);
 395                 printf("  KeyFile = %s\n\n", predef_chan->keyfile);
 396         }
 397
 398         return (config_valid ? 0 : 1);
 399 } /* Conf_Test */
 400
 401
 402 GLOBAL void
 403 Conf_UnsetServer( CONN_ID Idx )
 404 {
 405         /* Set next time for next connection attempt, if this is a server
 406          * link that is (still) configured here. If the server is set as
 407          * "once", delete it from our configuration.
 408          * Non-Server-Connections will be silently ignored. */
 409
 410         int i;
 411         time_t t;
 412
 413         /* Check all our configured servers */
 414         for( i = 0; i < MAX_SERVERS; i++ ) {
 415                 if( Conf_Server[i].conn_id != Idx ) continue;
 416
 417                 /* Gotcha! Mark server configuration as "unused": */
 418                 Conf_Server[i].conn_id = NONE;
 419
 420                 if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 421                         /* Delete configuration here */
 422                         Init_Server_Struct( &Conf_Server[i] );
 423                 } else {
 424                         /* Set time for next connect attempt */
 425                         t = time(NULL);
 426                         if (Conf_Server[i].lasttry < t - Conf_ConnectRetry) {
 427                                 /* The connection has been "long", so we don't
 428                                  * require the next attempt to be delayed. */
 429                                 Conf_Server[i].lasttry =
 430                                         t - Conf_ConnectRetry + RECONNECT_DELAY;
 431                         } else
 432                                 Conf_Server[i].lasttry = t;
 433                 }
 434         }
 435 } /* Conf_UnsetServer */
 436
 437
 438 GLOBAL void
 439 Conf_SetServer( int ConfServer, CONN_ID Idx )
 440 {
 441         /* Set connection for specified configured server */
 442
 443         assert( ConfServer > NONE );
 444         assert( Idx > NONE );
 445
 446         Conf_Server[ConfServer].conn_id = Idx;
 447 } /* Conf_SetServer */
 448
 449
 450 GLOBAL int
 451 Conf_GetServer( CONN_ID Idx )
 452 {
 453         /* Get index of server in configuration structure */
 454
 455         int i = 0;
 456
 457         assert( Idx > NONE );
 458
 459         for( i = 0; i < MAX_SERVERS; i++ ) {
 460                 if( Conf_Server[i].conn_id == Idx ) return i;
 461         }
 462         return NONE;
 463 } /* Conf_GetServer */
 464
 465
 466 GLOBAL bool
 467 Conf_EnableServer( const char *Name, UINT16 Port )
 468 {
 469         /* Enable specified server and adjust port */
 470
 471         int i;
 472
 473         assert( Name != NULL );
 474
 475         for( i = 0; i < MAX_SERVERS; i++ ) {
 476                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 477                         /* Gotcha! Set port and enable server: */
 478                         Conf_Server[i].port = Port;
 479                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 480                         return (Conf_Server[i].port && Conf_Server[i].host[0]);
 481                 }
 482         }
 483         return false;
 484 } /* Conf_EnableServer */
 485
 486
 487 GLOBAL bool
 488 Conf_EnablePassiveServer(const char *Name)
 489 {
 490         /* Enable specified server */
 491         int i;
 492
 493         assert( Name != NULL );
 494         for (i = 0; i < MAX_SERVERS; i++) {
 495                 if ((strcasecmp( Conf_Server[i].name, Name ) == 0) && (Conf_Server[i].port > 0)) {
 496                         /* BINGO! Enable server */
 497                         Conf_Server[i].flags &= ~CONF_SFLAG_DISABLED;
 498                         return true;
 499                 }
 500         }
 501         return false;
 502 } /* Conf_EnablePassiveServer */
 503
 504
 505 GLOBAL bool
 506 Conf_DisableServer( const char *Name )
 507 {
 508         /* Enable specified server and adjust port */
 509
 510         int i;
 511
 512         assert( Name != NULL );
 513
 514         for( i = 0; i < MAX_SERVERS; i++ ) {
 515                 if( strcasecmp( Conf_Server[i].name, Name ) == 0 ) {
 516                         /* Gotcha! Disable and disconnect server: */
 517                         Conf_Server[i].flags |= CONF_SFLAG_DISABLED;
 518                         if( Conf_Server[i].conn_id > NONE ) Conn_Close( Conf_Server[i].conn_id, NULL, "Server link terminated on operator request", true);
 519                         return true;
 520                 }
 521         }
 522         return false;
 523 } /* Conf_DisableServer */
 524
 525
 526 GLOBAL bool
 527 Conf_AddServer( const char *Name, UINT16 Port, const char *Host, const char *MyPwd, const char *PeerPwd )
 528 {
 529         /* Add new server to configuration */
 530
 531         int i;
 532
 533         assert( Name != NULL );
 534         assert( Host != NULL );
 535         assert( MyPwd != NULL );
 536         assert( PeerPwd != NULL );
 537
 538         /* Search unused item in server configuration structure */
 539         for( i = 0; i < MAX_SERVERS; i++ ) {
 540                 /* Is this item used? */
 541                 if( ! Conf_Server[i].name[0] ) break;
 542         }
 543         if( i >= MAX_SERVERS ) return false;
 544
 545         Init_Server_Struct( &Conf_Server[i] );
 546         strlcpy( Conf_Server[i].name, Name, sizeof( Conf_Server[i].name ));
 547         strlcpy( Conf_Server[i].host, Host, sizeof( Conf_Server[i].host ));
 548         strlcpy( Conf_Server[i].pwd_out, MyPwd, sizeof( Conf_Server[i].pwd_out ));
 549         strlcpy( Conf_Server[i].pwd_in, PeerPwd, sizeof( Conf_Server[i].pwd_in ));
 550         Conf_Server[i].port = Port;
 551         Conf_Server[i].flags = CONF_SFLAG_ONCE;
 552
 553         return true;
 554 } /* Conf_AddServer */
 555
 556
 557 /**
 558  * Check if the given nick name is an service
 559  */
 560 GLOBAL bool
 561 Conf_IsService(int ConfServer, const char *Nick)
 562 {
 563         return MatchCaseInsensitive(Conf_Server[ConfServer].svs_mask, Nick);
 564 } /* Conf_IsService */
 565
 566
 567 static void
 568 Set_Defaults_Optional(void)
 569 {
 570 #ifdef IDENTAUTH
 571         Conf_Ident = true;
 572 #else
 573         Conf_Ident = false;
 574 #endif
 575 #ifdef PAM
 576         Conf_PAM = true;
 577 #else
 578         Conf_PAM = false;
 579 #endif
 580 #ifdef ZEROCONF
 581         Conf_ZeroConf = true;
 582 #else
 583         Conf_ZeroConf = false;
 584 #endif
 585 }
 586
 587
 588 /**
 589  * Initialize configuration settings with their default values.
 590  */
 591 static void
 592 Set_Defaults(bool InitServers)
 593 {
 594         int i;
 595
 596         strcpy(Conf_ServerName, "");
 597         snprintf(Conf_ServerInfo, sizeof Conf_ServerInfo, "%s %s",
 598                  PACKAGE_NAME, PACKAGE_VERSION);
 599         strcpy(Conf_ServerPwd, "");
 600
 601         strcpy(Conf_ServerAdmin1, "");
 602         strcpy(Conf_ServerAdmin2, "");
 603         strcpy(Conf_ServerAdminMail, "");
 604
 605         strlcpy(Conf_MotdFile, SYSCONFDIR, sizeof(Conf_MotdFile));
 606         strlcat(Conf_MotdFile, MOTD_FILE, sizeof(Conf_MotdFile));
 607
 608         Conf_UID = Conf_GID = 0;
 609         strlcpy(Conf_Chroot, CHROOT_DIR, sizeof(Conf_Chroot));
 610         strlcpy(Conf_PidFile, PID_FILE, sizeof(Conf_PidFile));
 611
 612         free(Conf_ListenAddress);
 613         Conf_ListenAddress = NULL;
 614
 615         Conf_PingTimeout = 120;
 616         Conf_PongTimeout = 20;
 617         Conf_ConnectRetry = 60;
 618         Conf_DNS = true;
 619
 620         Conf_Oper_Count = 0;
 621         Conf_Channel_Count = 0;
 622
 623         Conf_OperCanMode = false;
 624         Conf_OperServerMode = false;
 625         Conf_AllowRemoteOper = false;
 626         Conf_PredefChannelsOnly = false;
 627
 628         Conf_ConnectIPv4 = true;
 629         Conf_ConnectIPv6 = true;
 630
 631         Conf_MaxConnections = 0;
 632         Conf_MaxConnectionsIP = 5;
 633         Conf_MaxJoins = 10;
 634         Conf_MaxNickLength = CLIENT_NICK_LEN_DEFAULT;
 635
 636 #ifdef SYSLOG
 637 #ifdef LOG_LOCAL5
 638         Conf_SyslogFacility = LOG_LOCAL5;
 639 #else
 640         Conf_SyslogFacility = 0;
 641 #endif
 642 #endif
 643         Set_Defaults_Optional();
 644
 645         /* Initialize server configuration structures */
 646         if (InitServers) {
 647                 for (i = 0; i < MAX_SERVERS;
 648                      Init_Server_Struct(&Conf_Server[i++]));
 649         }
 650 } /* Set_Defaults */
 651
 652
 653 static bool
 654 no_listenports(void)
 655 {
 656         size_t cnt = array_bytes(&Conf_ListenPorts);
 657 #ifdef SSL_SUPPORT
 658         cnt += array_bytes(&Conf_SSLOptions.ListenPorts);
 659 #endif
 660         return cnt == 0;
 661 }
 662
 663 static void
 664 Read_Motd(const char *filename)
 665 {
 666         char line[127];
 667         FILE *fp;
 668
 669         if (*filename == '\0')
 670                 return;
 671
 672         fp = fopen(filename, "r");
 673         if (!fp) {
 674                 Log(LOG_WARNING, "Can't read MOTD file \"%s\": %s",
 675                                         filename, strerror(errno));
 676                 return;
 677         }
 678
 679         array_free(&Conf_Motd);
 680         Using_MotdFile = true;
 681
 682         while (fgets(line, (int)sizeof line, fp)) {
 683                 ngt_TrimLastChr( line, '\n');
 684
 685                 /* add text including \0 */
 686                 if (!array_catb(&Conf_Motd, line, strlen(line) + 1)) {
 687                         Log(LOG_WARNING, "Cannot add MOTD text: %s", strerror(errno));
 688                         break;
 689                 }
 690         }
 691         fclose(fp);
 692 }
 693
 694 static bool
 695 Read_Config( bool ngircd_starting )
 696 {
 697         /* Read configuration file. */
 698
 699         char section[LINE_LEN], str[LINE_LEN], *var, *arg, *ptr;
 700         const UINT16 defaultport = 6667;
 701         int line, i, n;
 702         FILE *fd;
 703
 704         /* Open configuration file */
 705         fd = fopen( NGIRCd_ConfFile, "r" );
 706         if( ! fd ) {
 707                 /* No configuration file found! */
 708                 Config_Error( LOG_ALERT, "Can't read configuration \"%s\": %s",
 709                                         NGIRCd_ConfFile, strerror( errno ));
 710                 if (!ngircd_starting)
 711                         return false;
 712                 Config_Error( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
 713                 exit( 1 );
 714         }
 715
 716         opers_free();
 717         Set_Defaults( ngircd_starting );
 718
 719         Config_Error( LOG_INFO, "Reading configuration from \"%s\" ...", NGIRCd_ConfFile );
 720
 721         /* Clean up server configuration structure: mark all already
 722          * configured servers as "once" so that they are deleted
 723          * after the next disconnect and delete all unused servers.
 724          * And delete all servers which are "duplicates" of servers
 725          * that are already marked as "once" (such servers have been
 726          * created by the last rehash but are now useless). */
 727         for( i = 0; i < MAX_SERVERS; i++ ) {
 728                 if( Conf_Server[i].conn_id == NONE ) Init_Server_Struct( &Conf_Server[i] );
 729                 else {
 730                         /* This structure is in use ... */
 731                         if( Conf_Server[i].flags & CONF_SFLAG_ONCE ) {
 732                                 /* Check for duplicates */
 733                                 for( n = 0; n < MAX_SERVERS; n++ ) {
 734                                         if( n == i ) continue;
 735
 736                                         if( Conf_Server[i].conn_id == Conf_Server[n].conn_id ) {
 737                                                 Init_Server_Struct( &Conf_Server[n] );
 738 #ifdef DEBUG
 739                                                 Log(LOG_DEBUG,"Deleted unused duplicate server %d (kept %d).",
 740                                                                                                 n, i );
 741 #endif
 742                                         }
 743                                 }
 744                         } else {
 745                                 /* Mark server as "once" */
 746                                 Conf_Server[i].flags |= CONF_SFLAG_ONCE;
 747                                 Log( LOG_DEBUG, "Marked server %d as \"once\"", i );
 748                         }
 749                 }
 750         }
 751
 752         /* Initialize variables */
 753         line = 0;
 754         strcpy( section, "" );
 755         Init_Server_Struct( &New_Server );
 756         New_Server_Idx = NONE;
 757 #ifdef SSL_SUPPORT
 758         ConfSSL_Init();
 759 #endif
 760         /* Read configuration file */
 761         while( true ) {
 762                 if( ! fgets( str, LINE_LEN, fd )) break;
 763                 ngt_TrimStr( str );
 764                 line++;
 765
 766                 /* Skip comments and empty lines */
 767                 if( str[0] == ';' || str[0] == '#' || str[0] == '\0' ) continue;
 768
 769                 /* Is this the beginning of a new section? */
 770                 if(( str[0] == '[' ) && ( str[strlen( str ) - 1] == ']' )) {
 771                         strlcpy( section, str, sizeof( section ));
 772                         if (strcasecmp( section, "[GLOBAL]" ) == 0 ||
 773                             strcasecmp( section, "[FEATURES]") == 0)
 774                                 continue;
 775
 776                         if( strcasecmp( section, "[SERVER]" ) == 0 ) {
 777                                 /* Check if there is already a server to add */
 778                                 if( New_Server.name[0] ) {
 779                                         /* Copy data to "real" server structure */
 780                                         assert( New_Server_Idx > NONE );
 781                                         Conf_Server[New_Server_Idx] = New_Server;
 782                                 }
 783
 784                                 /* Re-init structure for new server */
 785                                 Init_Server_Struct( &New_Server );
 786
 787                                 /* Search unused item in server configuration structure */
 788                                 for( i = 0; i < MAX_SERVERS; i++ ) {
 789                                         /* Is this item used? */
 790                                         if( ! Conf_Server[i].name[0] ) break;
 791                                 }
 792                                 if( i >= MAX_SERVERS ) {
 793                                         /* Oops, no free item found! */
 794                                         Config_Error( LOG_ERR, "Too many servers configured." );
 795                                         New_Server_Idx = NONE;
 796                                 }
 797                                 else New_Server_Idx = i;
 798                                 continue;
 799                         }
 800                         if (strcasecmp(section, "[CHANNEL]") == 0) {
 801                                 Conf_Channel_Count++;
 802                                 continue;
 803                         }
 804                         if (strcasecmp(section, "[OPERATOR]") == 0) {
 805                                 Conf_Oper_Count++;
 806                                 continue;
 807                         }
 808
 809                         Config_Error( LOG_ERR, "%s, line %d: Unknown section \"%s\"!", NGIRCd_ConfFile, line, section );
 810                         section[0] = 0x1;
 811                 }
 812                 if( section[0] == 0x1 ) continue;
 813
 814                 /* Split line into variable name and parameters */
 815                 ptr = strchr( str, '=' );
 816                 if( ! ptr ) {
 817                         Config_Error( LOG_ERR, "%s, line %d: Syntax error!", NGIRCd_ConfFile, line );
 818                         continue;
 819                 }
 820                 *ptr = '\0';
 821                 var = str; ngt_TrimStr( var );
 822                 arg = ptr + 1; ngt_TrimStr( arg );
 823
 824                 if( strcasecmp( section, "[GLOBAL]" ) == 0 ) Handle_GLOBAL( line, var, arg );
 825                 else if( strcasecmp( section, "[FEATURES]" ) == 0 ) Handle_FEATURES( line, var, arg );
 826                 else if( strcasecmp( section, "[OPERATOR]" ) == 0 ) Handle_OPERATOR( line, var, arg );
 827                 else if( strcasecmp( section, "[SERVER]" ) == 0 ) Handle_SERVER( line, var, arg );
 828                 else if( strcasecmp( section, "[CHANNEL]" ) == 0 ) Handle_CHANNEL( line, var, arg );
 829                 else Config_Error( LOG_ERR, "%s, line %d: Variable \"%s\" outside section!", NGIRCd_ConfFile, line, var );
 830         }
 831
 832         /* Close configuration file */
 833         fclose( fd );
 834
 835         /* Check if there is still a server to add */
 836         if( New_Server.name[0] ) {
 837                 /* Copy data to "real" server structure */
 838                 assert( New_Server_Idx > NONE );
 839                 Conf_Server[New_Server_Idx] = New_Server;
 840         }
 841
 842         /* not a single listening port? Add default. */
 843         if (no_listenports() &&
 844                 !array_copyb(&Conf_ListenPorts, (char*) &defaultport, sizeof defaultport))
 845         {
 846                 Config_Error(LOG_ALERT, "Could not add default listening Port %u: %s",
 847                                         (unsigned int) defaultport, strerror(errno));
 848
 849                 exit(1);
 850         }
 851
 852         if (!Conf_ListenAddress)
 853                 Conf_ListenAddress = strdup_warn(DEFAULT_LISTEN_ADDRSTR);
 854
 855         if (!Conf_ListenAddress) {
 856                 Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
 857                 exit(1);
 858         }
 859
 860         /* No MOTD phrase configured? (re)try motd file. */
 861         if (array_bytes(&Conf_Motd) == 0)
 862                 Read_Motd(Conf_MotdFile);
 863         return true;
 864 } /* Read_Config */
 865
 866
 867 static bool
 868 Check_ArgIsTrue( const char *Arg )
 869 {
 870         if( strcasecmp( Arg, "yes" ) == 0 ) return true;
 871         if( strcasecmp( Arg, "true" ) == 0 ) return true;
 872         if( atoi( Arg ) != 0 ) return true;
 873
 874         return false;
 875 } /* Check_ArgIsTrue */
 876
 877
 878 static unsigned int
 879 Handle_MaxNickLength(int Line, const char *Arg)
 880 {
 881         unsigned new;
 882
 883         new = (unsigned) atoi(Arg) + 1;
 884         if (new > CLIENT_NICK_LEN) {
 885                 Config_Error(LOG_WARNING,
 886                              "%s, line %d: Value of \"MaxNickLength\" exceeds %u!",
 887                              NGIRCd_ConfFile, Line, CLIENT_NICK_LEN - 1);
 888                 return CLIENT_NICK_LEN;
 889         }
 890         if (new < 2) {
 891                 Config_Error(LOG_WARNING,
 892                              "%s, line %d: Value of \"MaxNickLength\" must be at least 1!",
 893                              NGIRCd_ConfFile, Line);
 894                 return 2;
 895         }
 896         return new;
 897 } /* Handle_MaxNickLength */
 898
 899
 900 static void
 901 WarnIdent(int UNUSED Line)
 902 {
 903 #ifndef IDENTAUTH
 904         if (Conf_Ident) {
 905                 /* user has enabled ident lookups explicitly, but ... */
 906                 Config_Error(LOG_WARNING,
 907                         "%s: line %d: %s=True, but ngircd was built without support",
 908                         NGIRCd_ConfFile, Line, "Ident");
 909         }
 910 #endif
 911 }
 912
 913 static void
 914 WarnPAM(int UNUSED Line)
 915 {
 916 #ifndef PAM
 917         if (Conf_PAM) {
 918                 Config_Error(LOG_WARNING,
 919                         "%s: line %d: %s=True, but ngircd was built without support",
 920                         NGIRCd_ConfFile, Line, "PAM");
 921         }
 922 #endif
 923 }
 924
 925 static bool
 926 CheckLegacyNoOption(const char *Var, const char *Arg)
 927 {
 928         if( strcasecmp( Var, "NoDNS" ) == 0 ) {
 929                 Conf_DNS = !Check_ArgIsTrue( Arg );
 930                 return true;
 931         }
 932         if (strcasecmp(Var, "NoIdent") == 0) {
 933                 Conf_Ident = !Check_ArgIsTrue(Arg);
 934                 return true;
 935         }
 936         if(strcasecmp(Var, "NoPAM") == 0) {
 937                 Conf_PAM = !Check_ArgIsTrue(Arg);
 938                 return true;
 939         }
 940         if(strcasecmp(Var, "NoZeroConf") == 0) {
 941                 Conf_ZeroConf = !Check_ArgIsTrue(Arg);
 942                 return true;
 943         }
 944         return false;
 945 }
 946
 947 static const char *
 948 NoNo(const char *str)
 949 {
 950         assert(strncasecmp("no", str, 2) == 0 && str[2]);
 951         return str + 2;
 952 }
 953
 954 static const char *
 955 InvertArg(const char *arg)
 956 {
 957         return yesno_to_str(!Check_ArgIsTrue(arg));
 958 }
 959
 960 static void
 961 Handle_GLOBAL( int Line, char *Var, char *Arg )
 962 {
 963         struct passwd *pwd;
 964         struct group *grp;
 965         size_t len;
 966
 967         assert( Line > 0 );
 968         assert( Var != NULL );
 969         assert( Arg != NULL );
 970
 971         if( strcasecmp( Var, "Name" ) == 0 ) {
 972                 /* Server name */
 973                 len = strlcpy( Conf_ServerName, Arg, sizeof( Conf_ServerName ));
 974                 if (len >= sizeof( Conf_ServerName ))
 975                         Config_Error_TooLong( Line, Var );
 976                 return;
 977         }
 978         if( strcasecmp( Var, "Info" ) == 0 ) {
 979                 /* Info text of server */
 980                 len = strlcpy( Conf_ServerInfo, Arg, sizeof( Conf_ServerInfo ));
 981                 if (len >= sizeof( Conf_ServerInfo ))
 982                         Config_Error_TooLong ( Line, Var );
 983                 return;
 984         }
 985         if( strcasecmp( Var, "Password" ) == 0 ) {
 986                 /* Global server password */
 987                 len = strlcpy( Conf_ServerPwd, Arg, sizeof( Conf_ServerPwd ));
 988                 if (len >= sizeof( Conf_ServerPwd ))
 989                         Config_Error_TooLong( Line, Var );
 990                 return;
 991         }
 992         if (strcasecmp(Var, "WebircPassword") == 0) {
 993                 /* Password required for WEBIRC command */
 994                 len = strlcpy(Conf_WebircPwd, Arg, sizeof(Conf_WebircPwd));
 995                 if (len >= sizeof(Conf_WebircPwd))
 996                         Config_Error_TooLong(Line, Var);
 997                 return;
 998         }
 999         if( strcasecmp( Var, "AdminInfo1" ) == 0 ) {
1000                 /* Administrative info #1 */
1001                 len = strlcpy( Conf_ServerAdmin1, Arg, sizeof( Conf_ServerAdmin1 ));
1002                 if (len >= sizeof( Conf_ServerAdmin1 ))
1003                         Config_Error_TooLong ( Line, Var );
1004                 return;
1005         }
1006         if( strcasecmp( Var, "AdminInfo2" ) == 0 ) {
1007                 /* Administrative info #2 */
1008                 len = strlcpy( Conf_ServerAdmin2, Arg, sizeof( Conf_ServerAdmin2 ));
1009                 if (len >= sizeof( Conf_ServerAdmin2 ))
1010                         Config_Error_TooLong ( Line, Var );
1011                 return;
1012         }
1013         if( strcasecmp( Var, "AdminEMail" ) == 0 ) {
1014                 /* Administrative email contact */
1015                 len = strlcpy( Conf_ServerAdminMail, Arg, sizeof( Conf_ServerAdminMail ));
1016                 if (len >= sizeof( Conf_ServerAdminMail ))
1017                         Config_Error_TooLong( Line, Var );
1018                 return;
1019         }
1020
1021         if( strcasecmp( Var, "Ports" ) == 0 ) {
1022                 ports_parse(&Conf_ListenPorts, Line, Arg);
1023                 return;
1024         }
1025         if( strcasecmp( Var, "MotdFile" ) == 0 ) {
1026                 len = strlcpy( Conf_MotdFile, Arg, sizeof( Conf_MotdFile ));
1027                 if (len >= sizeof( Conf_MotdFile ))
1028                         Config_Error_TooLong( Line, Var );
1029                 Read_Motd(Arg);
1030                 return;
1031         }
1032         if( strcasecmp( Var, "MotdPhrase" ) == 0 ) {
1033                 /* "Message of the day" phrase (instead of file) */
1034                 len = strlen(Arg);
1035                 if (len == 0)
1036                         return;
1037                 if (len >= LINE_LEN) {
1038                         Config_Error_TooLong( Line, Var );
1039                         return;
1040                 }
1041                 if (!array_copyb(&Conf_Motd, Arg, len + 1))
1042                         Config_Error(LOG_WARNING, "%s, line %d: Could not append MotdPhrase: %s",
1043                                                         NGIRCd_ConfFile, Line, strerror(errno));
1044                 Using_MotdFile = false;
1045                 return;
1046         }
1047         if( strcasecmp( Var, "ChrootDir" ) == 0 ) {
1048                 /* directory for chroot() */
1049                 len = strlcpy( Conf_Chroot, Arg, sizeof( Conf_Chroot ));
1050                 if (len >= sizeof( Conf_Chroot ))
1051                         Config_Error_TooLong( Line, Var );
1052                 return;
1053         }
1054         if ( strcasecmp( Var, "PidFile" ) == 0 ) {
1055                 /* name of pidfile */
1056                 len = strlcpy( Conf_PidFile, Arg, sizeof( Conf_PidFile ));
1057                 if (len >= sizeof( Conf_PidFile ))
1058                         Config_Error_TooLong( Line, Var );
1059                 return;
1060         }
1061         if( strcasecmp( Var, "ServerUID" ) == 0 ) {
1062                 /* UID the daemon should switch to */
1063                 pwd = getpwnam( Arg );
1064                 if( pwd ) Conf_UID = pwd->pw_uid;
1065                 else {
1066 #ifdef HAVE_ISDIGIT
1067                         if( ! isdigit( (int)*Arg )) Config_Error_NaN( Line, Var );
1068                         else
1069 #endif
1070                         Conf_UID = (unsigned int)atoi( Arg );
1071                 }
1072                 return;
1073         }
1074         if( strcasecmp( Var, "ServerGID" ) == 0 ) {
1075                 /* GID the daemon should use */
1076                 grp = getgrnam( Arg );
1077                 if( grp ) Conf_GID = grp->gr_gid;
1078                 else {
1079 #ifdef HAVE_ISDIGIT
1080                         if( ! isdigit( (int)*Arg )) Config_Error_NaN( Line, Var );
1081                         else
1082 #endif
1083                         Conf_GID = (unsigned int)atoi( Arg );
1084                 }
1085                 return;
1086         }
1087         if( strcasecmp( Var, "PingTimeout" ) == 0 ) {
1088                 /* PING timeout */
1089                 Conf_PingTimeout = atoi( Arg );
1090                 if( Conf_PingTimeout < 5 ) {
1091                         Config_Error( LOG_WARNING, "%s, line %d: Value of \"PingTimeout\" too low!",
1092                                                                         NGIRCd_ConfFile, Line );
1093                         Conf_PingTimeout = 5;
1094                 }
1095                 return;
1096         }
1097         if( strcasecmp( Var, "PongTimeout" ) == 0 ) {
1098                 /* PONG timeout */
1099                 Conf_PongTimeout = atoi( Arg );
1100                 if( Conf_PongTimeout < 5 ) {
1101                         Config_Error( LOG_WARNING, "%s, line %d: Value of \"PongTimeout\" too low!",
1102                                                                         NGIRCd_ConfFile, Line );
1103                         Conf_PongTimeout = 5;
1104                 }
1105                 return;
1106         }
1107         if( strcasecmp( Var, "ConnectRetry" ) == 0 ) {
1108                 /* Seconds between connection attempts to other servers */
1109                 Conf_ConnectRetry = atoi( Arg );
1110                 if( Conf_ConnectRetry < 5 ) {
1111                         Config_Error( LOG_WARNING, "%s, line %d: Value of \"ConnectRetry\" too low!",
1112                                                                         NGIRCd_ConfFile, Line );
1113                         Conf_ConnectRetry = 5;
1114                 }
1115                 return;
1116         }
1117         if( strcasecmp( Var, "PredefChannelsOnly" ) == 0 ) {
1118                 /* Should we only allow pre-defined-channels? (i.e. users cannot create their own channels) */
1119                 Conf_PredefChannelsOnly = Check_ArgIsTrue( Arg );
1120                 return;
1121         }
1122
1123         if (CheckLegacyNoOption(Var, Arg)) {
1124                 Config_Error(LOG_WARNING, "%s, line %d: \"No\"-Prefix has been removed, use "
1125                                 "\"%s = %s\" in [FEATURES] section instead",
1126                                         NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
1127                 if (strcasecmp(Var, "NoIdent") == 0)
1128                         WarnIdent(Line);
1129                 else if (strcasecmp(Var, "NoPam") == 0)
1130                         WarnPAM(Line);
1131                 return;
1132         }
1133 #ifdef WANT_IPV6
1134         /* the default setting for all the WANT_IPV6 special options is 'true' */
1135         if( strcasecmp( Var, "ConnectIPv6" ) == 0 ) {
1136                 /* connect to other hosts using ipv6, if they have an AAAA record? */
1137                 Conf_ConnectIPv6 = Check_ArgIsTrue( Arg );
1138                 return;
1139         }
1140         if( strcasecmp( Var, "ConnectIPv4" ) == 0 ) {
1141                 /* connect to other hosts using ipv4.
1142                  * again, this can be used for ipv6-only setups */
1143                 Conf_ConnectIPv4 = Check_ArgIsTrue( Arg );
1144                 return;
1145         }
1146 #endif
1147         if( strcasecmp( Var, "OperCanUseMode" ) == 0 ) {
1148                 /* Are IRC operators allowed to use MODE in channels they aren't Op in? */
1149                 Conf_OperCanMode = Check_ArgIsTrue( Arg );
1150                 return;
1151         }
1152         if( strcasecmp( Var, "OperServerMode" ) == 0 ) {
1153                 /* Mask IRC operator as if coming from the server? (ircd-irc2 compat hack) */
1154                 Conf_OperServerMode = Check_ArgIsTrue( Arg );
1155                 return;
1156         }
1157         if(strcasecmp(Var, "AllowRemoteOper") == 0) {
1158                 /* Are remote IRC operators allowed to control this server? */
1159                 Conf_AllowRemoteOper = Check_ArgIsTrue(Arg);
1160                 return;
1161         }
1162         if( strcasecmp( Var, "MaxConnections" ) == 0 ) {
1163                 /* Maximum number of connections. 0 -> "no limit". */
1164 #ifdef HAVE_ISDIGIT
1165                 if( ! isdigit( (int)*Arg )) Config_Error_NaN( Line, Var);
1166                 else
1167 #endif
1168                 Conf_MaxConnections = atol( Arg );
1169                 return;
1170         }
1171         if( strcasecmp( Var, "MaxConnectionsIP" ) == 0 ) {
1172                 /* Maximum number of simultaneous connections from one IP. 0 -> "no limit" */
1173 #ifdef HAVE_ISDIGIT
1174                 if( ! isdigit( (int)*Arg )) Config_Error_NaN( Line, Var );
1175                 else
1176 #endif
1177                 Conf_MaxConnectionsIP = atoi( Arg );
1178                 return;
1179         }
1180         if( strcasecmp( Var, "MaxJoins" ) == 0 ) {
1181                 /* Maximum number of channels a user can join. 0 -> "no limit". */
1182 #ifdef HAVE_ISDIGIT
1183                 if( ! isdigit( (int)*Arg )) Config_Error_NaN( Line, Var );
1184                 else
1185 #endif
1186                 Conf_MaxJoins = atoi( Arg );
1187                 return;
1188         }
1189         if( strcasecmp( Var, "MaxNickLength" ) == 0 ) {
1190                 /* Maximum length of a nick name; must be same on all servers
1191                  * within the IRC network! */
1192                 Conf_MaxNickLength = Handle_MaxNickLength(Line, Arg);
1193                 return;
1194         }
1195
1196         if( strcasecmp( Var, "Listen" ) == 0 ) {
1197                 /* IP-Address to bind sockets */
1198                 if (Conf_ListenAddress) {
1199                         Config_Error(LOG_ERR, "Multiple Listen= options, ignoring: %s", Arg);
1200                         return;
1201                 }
1202                 Conf_ListenAddress = strdup_warn(Arg);
1203                 /*
1204                  * if allocation fails, we're in trouble:
1205                  * we cannot ignore the error -- otherwise ngircd
1206                  * would listen on all interfaces.
1207                  */
1208                 if (!Conf_ListenAddress) {
1209                         Config_Error(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
1210                         exit(1);
1211                 }
1212                 return;
1213         }
1214
1215 #ifdef SSL_SUPPORT
1216         if( strcasecmp( Var, "SSLPorts" ) == 0 ) {
1217                 ports_parse(&Conf_SSLOptions.ListenPorts, Line, Arg);
1218                 return;
1219         }
1220
1221         if( strcasecmp( Var, "SSLKeyFile" ) == 0 ) {
1222                 assert(Conf_SSLOptions.KeyFile == NULL );
1223                 Conf_SSLOptions.KeyFile = strdup_warn(Arg);
1224                 return;
1225         }
1226         if( strcasecmp( Var, "SSLCertFile" ) == 0 ) {
1227                 assert(Conf_SSLOptions.CertFile == NULL );
1228                 Conf_SSLOptions.CertFile = strdup_warn(Arg);
1229                 return;
1230         }
1231
1232         if( strcasecmp( Var, "SSLKeyFilePassword" ) == 0 ) {
1233                 assert(array_bytes(&Conf_SSLOptions.KeyFilePassword) == 0);
1234                 if (!array_copys(&Conf_SSLOptions.KeyFilePassword, Arg))
1235                         Config_Error( LOG_ERR, "%s, line %d (section \"Global\"): Could not copy %s: %s!",
1236                                                                 NGIRCd_ConfFile, Line, Var, strerror(errno));
1237                 return;
1238         }
1239         if( strcasecmp( Var, "SSLDHFile" ) == 0 ) {
1240                 assert(Conf_SSLOptions.DHFile == NULL);
1241                 Conf_SSLOptions.DHFile = strdup_warn( Arg );
1242                 return;
1243         }
1244 #endif
1245 #ifdef SYSLOG
1246         if (strcasecmp(Var, "SyslogFacility") == 0) {
1247                 Conf_SyslogFacility = ngt_SyslogFacilityID(Arg,
1248                                                            Conf_SyslogFacility);
1249                 return;
1250         }
1251 #endif
1252         Config_Error(LOG_ERR, "%s, line %d (section \"Global\"): Unknown variable \"%s\"!",
1253                                                                 NGIRCd_ConfFile, Line, Var);
1254 } /* Handle_GLOBAL */
1255
1256
1257 static void
1258 Handle_FEATURES(int Line, char *Var, char *Arg)
1259 {
1260         assert( Line > 0 );
1261         assert( Var != NULL );
1262         assert( Arg != NULL );
1263
1264         if( strcasecmp( Var, "DNS" ) == 0 ) {
1265                 /* do reverse dns lookups when clients connect? */
1266                 Conf_DNS = Check_ArgIsTrue( Arg );
1267                 return;
1268         }
1269         if (strcasecmp(Var, "Ident") == 0) {
1270                 /* do IDENT lookups when clients connect? */
1271                 Conf_Ident = Check_ArgIsTrue(Arg);
1272                 WarnIdent(Line);
1273                 return;
1274         }
1275         if(strcasecmp(Var, "PAM") == 0) {
1276                 /* use PAM library to authenticate users */
1277                 Conf_PAM = Check_ArgIsTrue(Arg);
1278                 WarnPAM(Line);
1279                 return;
1280         }
1281         if(strcasecmp(Var, "ZeroConf") == 0) {
1282                 /* register services using ZeroConf */
1283                 Conf_ZeroConf = Check_ArgIsTrue(Arg);
1284                 return;
1285         }
1286 }
1287
1288 static void
1289 Handle_OPERATOR( int Line, char *Var, char *Arg )
1290 {
1291         size_t len;
1292         struct Conf_Oper *op;
1293
1294         assert( Line > 0 );
1295         assert( Var != NULL );
1296         assert( Arg != NULL );
1297         assert( Conf_Oper_Count > 0 );
1298
1299         op = array_alloc(&Conf_Opers, sizeof(*op), Conf_Oper_Count - 1);
1300         if (!op) {
1301                 Config_Error(LOG_ERR, "Could not allocate memory for operator (%d:%s = %s)", Line, Var, Arg);
1302                 return;
1303         }
1304
1305         if (strcasecmp(Var, "Name") == 0) {
1306                 /* Name of IRC operator */
1307                 len = strlcpy(op->name, Arg, sizeof(op->name));
1308                 if (len >= sizeof(op->name))
1309                                 Config_Error_TooLong(Line, Var);
1310                 return;
1311         }
1312         if (strcasecmp(Var, "Password") == 0) {
1313                 /* Password of IRC operator */
1314                 len = strlcpy(op->pwd, Arg, sizeof(op->pwd));
1315                 if (len >= sizeof(op->pwd))
1316                                 Config_Error_TooLong(Line, Var);
1317                 return;
1318         }
1319         if (strcasecmp(Var, "Mask") == 0) {
1320                 if (op->mask)
1321                         return; /* Hostname already configured */
1322                 op->mask = strdup_warn( Arg );
1323                 return;
1324         }
1325         Config_Error( LOG_ERR, "%s, line %d (section \"Operator\"): Unknown variable \"%s\"!",
1326                                                                 NGIRCd_ConfFile, Line, Var );
1327 } /* Handle_OPERATOR */
1328
1329
1330 static void
1331 Handle_SERVER( int Line, char *Var, char *Arg )
1332 {
1333         long port;
1334         size_t len;
1335
1336         assert( Line > 0 );
1337         assert( Var != NULL );
1338         assert( Arg != NULL );
1339
1340         /* Ignore server block if no space is left in server configuration structure */
1341         if( New_Server_Idx <= NONE ) return;
1342
1343         if( strcasecmp( Var, "Host" ) == 0 ) {
1344                 /* Hostname of the server */
1345                 len = strlcpy( New_Server.host, Arg, sizeof( New_Server.host ));
1346                 if (len >= sizeof( New_Server.host ))
1347                         Config_Error_TooLong ( Line, Var );
1348                 return;
1349         }
1350         if( strcasecmp( Var, "Name" ) == 0 ) {
1351                 /* Name of the server ("Nick"/"ID") */
1352                 len = strlcpy( New_Server.name, Arg, sizeof( New_Server.name ));
1353                 if (len >= sizeof( New_Server.name ))
1354                         Config_Error_TooLong( Line, Var );
1355                 return;
1356         }
1357         if (strcasecmp(Var, "Bind") == 0) {
1358                 if (ng_ipaddr_init(&New_Server.bind_addr, Arg, 0))
1359                         return;
1360
1361                 Config_Error(LOG_ERR, "%s, line %d (section \"Server\"): Can't parse IP address \"%s\"",
1362                                 NGIRCd_ConfFile, Line, Arg);
1363                 return;
1364         }
1365         if( strcasecmp( Var, "MyPassword" ) == 0 ) {
1366                 /* Password of this server which is sent to the peer */
1367                 if (*Arg == ':') {
1368                         Config_Error(LOG_ERR,
1369                                 "%s, line %d (section \"Server\"): MyPassword must not start with ':'!",
1370                                                                                 NGIRCd_ConfFile, Line);
1371                 }
1372                 len = strlcpy( New_Server.pwd_in, Arg, sizeof( New_Server.pwd_in ));
1373                 if (len >= sizeof( New_Server.pwd_in ))
1374                         Config_Error_TooLong( Line, Var );
1375                 return;
1376         }
1377         if( strcasecmp( Var, "PeerPassword" ) == 0 ) {
1378                 /* Passwort of the peer which must be received */
1379                 len = strlcpy( New_Server.pwd_out, Arg, sizeof( New_Server.pwd_out ));
1380                 if (len >= sizeof( New_Server.pwd_out ))
1381                         Config_Error_TooLong( Line, Var );
1382                 return;
1383         }
1384         if( strcasecmp( Var, "Port" ) == 0 ) {
1385                 /* Port to which this server should connect */
1386                 port = atol( Arg );
1387                 if( port > 0 && port < 0xFFFF )
1388                         New_Server.port = (UINT16)port;
1389                 else
1390                         Config_Error( LOG_ERR, "%s, line %d (section \"Server\"): Illegal port number %ld!",
1391                                                                                 NGIRCd_ConfFile, Line, port );
1392                 return;
1393         }
1394 #ifdef SSL_SUPPORT
1395         if( strcasecmp( Var, "SSLConnect" ) == 0 ) {
1396                 New_Server.SSLConnect = Check_ArgIsTrue(Arg);
1397                 return;
1398         }
1399 #endif
1400         if( strcasecmp( Var, "Group" ) == 0 ) {
1401                 /* Server group */
1402 #ifdef HAVE_ISDIGIT
1403                 if( ! isdigit( (int)*Arg ))
1404                         Config_Error_NaN( Line, Var );
1405                 else
1406 #endif
1407                 New_Server.group = atoi( Arg );
1408                 return;
1409         }
1410         if( strcasecmp( Var, "Passive" ) == 0 ) {
1411                 if (Check_ArgIsTrue(Arg))
1412                         New_Server.flags |= CONF_SFLAG_DISABLED;
1413                 return;
1414         }
1415         if (strcasecmp(Var, "ServiceMask") == 0) {
1416                 len = strlcpy(New_Server.svs_mask, ngt_LowerStr(Arg),
1417                               sizeof(New_Server.svs_mask));
1418                 if (len >= sizeof(New_Server.svs_mask))
1419                         Config_Error_TooLong(Line, Var);
1420                 return;
1421         }
1422
1423         Config_Error( LOG_ERR, "%s, line %d (section \"Server\"): Unknown variable \"%s\"!",
1424                                                                 NGIRCd_ConfFile, Line, Var );
1425 } /* Handle_SERVER */
1426
1427
1428 static bool
1429 Handle_Channelname(struct Conf_Channel *new_chan, const char *name)
1430 {
1431         size_t size = sizeof(new_chan->name);
1432         char *dest = new_chan->name;
1433
1434         if (!Channel_IsValidName(name)) {
1435                 /*
1436                  * maybe user forgot to add a '#'.
1437                  * This is only here for user convenience.
1438                  */
1439                 *dest = '#';
1440                 --size;
1441                 ++dest;
1442         }
1443         return size > strlcpy(dest, name, size);
1444 }
1445
1446
1447 static void
1448 Handle_CHANNEL(int Line, char *Var, char *Arg)
1449 {
1450         size_t len;
1451         size_t chancount;
1452         struct Conf_Channel *chan;
1453
1454         assert( Line > 0 );
1455         assert( Var != NULL );
1456         assert( Arg != NULL );
1457         assert(Conf_Channel_Count > 0);
1458
1459         chancount = Conf_Channel_Count - 1;
1460
1461         chan = array_alloc(&Conf_Channels, sizeof(*chan), chancount);
1462         if (!chan) {
1463                 Config_Error(LOG_ERR, "Could not allocate memory for predefined channel (%d:%s = %s)", Line, Var, Arg);
1464                 return;
1465         }
1466         if (strcasecmp(Var, "Name") == 0) {
1467                 if (!Handle_Channelname(chan, Arg))
1468                         Config_Error_TooLong(Line, Var);
1469                 return;
1470         }
1471         if (strcasecmp(Var, "Modes") == 0) {
1472                 /* Initial modes */
1473                 len = strlcpy(chan->modes, Arg, sizeof(chan->modes));
1474                 if (len >= sizeof(chan->modes))
1475                         Config_Error_TooLong( Line, Var );
1476                 return;
1477         }
1478         if( strcasecmp( Var, "Topic" ) == 0 ) {
1479                 /* Initial topic */
1480                 len = strlcpy(chan->topic, Arg, sizeof(chan->topic));
1481                 if (len >= sizeof(chan->topic))
1482                         Config_Error_TooLong( Line, Var );
1483                 return;
1484         }
1485         if( strcasecmp( Var, "Key" ) == 0 ) {
1486                 /* Initial Channel Key (mode k) */
1487                 len = strlcpy(chan->key, Arg, sizeof(chan->key));
1488                 if (len >= sizeof(chan->key))
1489                         Config_Error_TooLong(Line, Var);
1490                 return;
1491         }
1492         if( strcasecmp( Var, "MaxUsers" ) == 0 ) {
1493                 /* maximum user limit, mode l */
1494                 chan->maxusers = (unsigned long) atol(Arg);
1495                 if (chan->maxusers == 0)
1496                         Config_Error_NaN(Line, Var);
1497                 return;
1498         }
1499         if (strcasecmp(Var, "KeyFile") == 0) {
1500                 /* channel keys */
1501                 len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile));
1502                 if (len >= sizeof(chan->keyfile))
1503                         Config_Error_TooLong(Line, Var);
1504                 return;
1505         }
1506
1507         Config_Error( LOG_ERR, "%s, line %d (section \"Channel\"): Unknown variable \"%s\"!",
1508                                                                 NGIRCd_ConfFile, Line, Var );
1509 } /* Handle_CHANNEL */
1510
1511
1512 static bool
1513 Validate_Config(bool Configtest, bool Rehash)
1514 {
1515         /* Validate configuration settings. */
1516
1517 #ifdef DEBUG
1518         int i, servers, servers_once;
1519 #endif
1520         bool config_valid = true;
1521         char *ptr;
1522
1523         /* Validate configured server name, see RFC 2812 section 2.3.1 */
1524         ptr = Conf_ServerName;
1525         do {
1526                 if (*ptr >= 'a' && *ptr <= 'z') continue;
1527                 if (*ptr >= 'A' && *ptr <= 'Z') continue;
1528                 if (*ptr >= '0' && *ptr <= '9') continue;
1529                 if (ptr > Conf_ServerName) {
1530                         if (*ptr == '.' || *ptr == '-')
1531                                 continue;
1532                 }
1533                 Conf_ServerName[0] = '\0';
1534                 break;
1535         } while (*(++ptr));
1536
1537         if (!Conf_ServerName[0]) {
1538                 /* No server name configured! */
1539                 config_valid = false;
1540                 Config_Error(LOG_ALERT,
1541                              "No (valid) server name configured in \"%s\" (section 'Global': 'Name')!",
1542                              NGIRCd_ConfFile);
1543                 if (!Configtest && !Rehash) {
1544                         Config_Error(LOG_ALERT,
1545                                      "%s exiting due to fatal errors!",
1546                                      PACKAGE_NAME);
1547                         exit(1);
1548                 }
1549         }
1550
1551         if (Conf_ServerName[0] && !strchr(Conf_ServerName, '.')) {
1552                 /* No dot in server name! */
1553                 config_valid = false;
1554                 Config_Error(LOG_ALERT,
1555                              "Invalid server name configured in \"%s\" (section 'Global': 'Name'): Dot missing!",
1556                              NGIRCd_ConfFile);
1557                 if (!Configtest) {
1558                         Config_Error(LOG_ALERT,
1559                                      "%s exiting due to fatal errors!",
1560                                      PACKAGE_NAME);
1561                         exit(1);
1562                 }
1563         }
1564
1565 #ifdef STRICT_RFC
1566         if (!Conf_ServerAdminMail[0]) {
1567                 /* No administrative contact configured! */
1568                 config_valid = false;
1569                 Config_Error(LOG_ALERT,
1570                              "No administrator email address configured in \"%s\" ('AdminEMail')!",
1571                              NGIRCd_ConfFile);
1572                 if (!Configtest) {
1573                         Config_Error(LOG_ALERT,
1574                                      "%s exiting due to fatal errors!",
1575                                      PACKAGE_NAME);
1576                         exit(1);
1577                 }
1578         }
1579 #endif
1580
1581         if (!Conf_ServerAdmin1[0] && !Conf_ServerAdmin2[0]
1582             && !Conf_ServerAdminMail[0]) {
1583                 /* No administrative information configured! */
1584                 Config_Error(LOG_WARNING,
1585                              "No administrative information configured but required by RFC!");
1586         }
1587
1588 #ifdef PAM
1589         if (Conf_ServerPwd[0])
1590                 Config_Error(LOG_ERR,
1591                              "This server uses PAM, \"Password\" will be ignored!");
1592 #endif
1593
1594 #ifdef DEBUG
1595         servers = servers_once = 0;
1596         for (i = 0; i < MAX_SERVERS; i++) {
1597                 if (Conf_Server[i].name[0]) {
1598                         servers++;
1599                         if (Conf_Server[i].flags & CONF_SFLAG_ONCE)
1600                                 servers_once++;
1601                 }
1602         }
1603         Log(LOG_DEBUG,
1604             "Configuration: Operators=%d, Servers=%d[%d], Channels=%d",
1605             Conf_Oper_Count, servers, servers_once, Conf_Channel_Count);
1606 #endif
1607
1608         return config_valid;
1609 } /* Validate_Config */
1610
1611
1612 static void
1613 Config_Error_TooLong ( const int Line, const char *Item )
1614 {
1615         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" too long!", NGIRCd_ConfFile, Line, Item );
1616 }
1617
1618
1619 static void
1620 Config_Error_NaN( const int Line, const char *Item )
1621 {
1622         Config_Error( LOG_WARNING, "%s, line %d: Value of \"%s\" is not a number!",
1623                                                 NGIRCd_ConfFile, Line, Item );
1624 }
1625
1626
1627 #ifdef PROTOTYPES
1628 static void Config_Error( const int Level, const char *Format, ... )
1629 #else
1630 static void Config_Error( Level, Format, va_alist )
1631 const int Level;
1632 const char *Format;
1633 va_dcl
1634 #endif
1635 {
1636         /* Error! Write to console and/or logfile. */
1637
1638         char msg[MAX_LOG_MSG_LEN];
1639         va_list ap;
1640
1641         assert( Format != NULL );
1642
1643 #ifdef PROTOTYPES
1644         va_start( ap, Format );
1645 #else
1646         va_start( ap );
1647 #endif
1648         vsnprintf( msg, MAX_LOG_MSG_LEN, Format, ap );
1649         va_end( ap );
1650
1651         /* During "normal operations" the log functions of the daemon should
1652          * be used, but during testing of the configuration file, all messages
1653          * should go directly to the console: */
1654         if (Use_Log) Log( Level, "%s", msg );
1655         else puts( msg );
1656 } /* Config_Error */
1657
1658
1659 #ifdef DEBUG
1660
1661 GLOBAL void
1662 Conf_DebugDump(void)
1663 {
1664         int i;
1665
1666         Log(LOG_DEBUG, "Configured servers:");
1667         for (i = 0; i < MAX_SERVERS; i++) {
1668                 if (! Conf_Server[i].name[0])
1669                         continue;
1670                 Log(LOG_DEBUG,
1671                     " - %s: %s:%d, last=%ld, group=%d, flags=%d, conn=%d",
1672                     Conf_Server[i].name, Conf_Server[i].host,
1673                     Conf_Server[i].port, Conf_Server[i].lasttry,
1674                     Conf_Server[i].group, Conf_Server[i].flags,
1675                     Conf_Server[i].conn_id);
1676         }
1677 } /* Conf_DebugDump */
1678
1679 #endif
1680
1681
1682 static void
1683 Init_Server_Struct( CONF_SERVER *Server )
1684 {
1685         /* Initialize server configuration structur to default values */
1686
1687         assert( Server != NULL );
1688
1689         memset( Server, 0, sizeof (CONF_SERVER) );
1690
1691         Server->group = NONE;
1692         Server->lasttry = time( NULL ) - Conf_ConnectRetry + STARTUP_DELAY;
1693
1694         if( NGIRCd_Passive ) Server->flags = CONF_SFLAG_DISABLED;
1695
1696         Proc_InitStruct(&Server->res_stat);
1697         Server->conn_id = NONE;
1698         memset(&Server->bind_addr, 0, sizeof(&Server->bind_addr));
1699 } /* Init_Server_Struct */
1700
1701
1702 /* -eof- */