X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fngircd.c;h=1166c7b74881ade1349e508fc1cb578b04c534d8;hp=67242a49cfa248e9ff31513481e69328b8da92db;hb=4a5b3f34a51bf3dd8feabe4f73c13bfd36e261bb;hpb=b61b8c4dc6f6cfdca6e45b0d0ecdd209be1e17dd diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c index 67242a49..1166c7b7 100644 --- a/src/ngircd/ngircd.c +++ b/src/ngircd/ngircd.c @@ -1,170 +1,552 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001 by Alexander Barton (alex@barton.de) + * Copyright (c)2001-2003 by Alexander Barton (alex@barton.de) * - * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen - * der GNU General Public License (GPL), wie von der Free Software Foundation - * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2 - * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version. - * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste - * der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS. - * - * $Id: ngircd.c,v 1.3 2001/12/12 01:40:39 alex Exp $ - * - * ngircd.c: Hier beginnt alles ;-) - * - * $Log: ngircd.c,v $ - * Revision 1.3 2001/12/12 01:40:39 alex - * - ein paar mehr Kommentare; Variablennamen verstaendlicher gemacht. - * - fehlenden Header ergaenz. - * - SIGINT und SIGQUIT werden nun ebenfalls behandelt. - * - * Revision 1.2 2001/12/11 22:04:21 alex - * - Test auf stdint.h (HAVE_STDINT_H) hinzugefuegt. - * - * Revision 1.1.1.1 2001/12/11 21:53:04 alex - * Imported sources to CVS. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * Please read the file COPYING, README and AUTHORS for more information. * + * Main program -- main() */ -#define PORTAB_CHECK_TYPES /* Prueffunktion einbinden, s.u. */ - -#ifndef socklen_t -#define socklen_t int /* u.a. fuer Mac OS X */ -#endif - -#include -#include "global.h" - -#include +#include "portab.h" -#ifdef HAVE_STDINT_H -#include /* u.a. fuer Mac OS X */ -#endif +static char UNUSED id[] = "$Id: ngircd.c,v 1.74 2003/03/07 14:50:13 alex Exp $"; +#include "imp.h" #include #include -#include #include +#include +#include #include #include -#include -#include -#include -#include +#include +#include +#include +#include +#include +#include - +#include "resolve.h" +#include "conn.h" +#include "client.h" +#include "channel.h" +#include "conf.h" +#include "cvs-version.h" +#include "defines.h" +#include "lists.h" #include "log.h" +#include "parse.h" +#include "irc.h" -#include -#include "ngircd.h" +#ifdef RENDEZVOUS +#include "rendezvous.h" +#endif +#include "exp.h" +#include "ngircd.h" -BOOLEAN do_quit_now = FALSE; /* TRUE: Hauptschleife beenden */ +LOCAL VOID Initialize_Signal_Handler PARAMS(( VOID )); +LOCAL VOID Signal_Handler PARAMS(( INT Signal )); -LOCAL VOID Signal_Handler( INT Signal ); +LOCAL VOID Show_Version PARAMS(( VOID )); +LOCAL VOID Show_Help PARAMS(( VOID )); -GLOBAL INT main( INT argc, CONST CHAR *argv[] ) +GLOBAL int +main( int argc, const char *argv[] ) { - FILE *fd; - struct sigaction saction; - struct sockaddr_in my_addr, a_addr; - int my_sock, a_sock; - int a_sock_len; + struct passwd *pwd; + struct group *grp; + BOOLEAN ok, configtest = FALSE; + LONG pid, n; + INT i; - portab_check_types( ); + umask( 0077 ); - Log_Init( ); - - /* Signal-Handler initialisieren */ - memset( &saction, 0, sizeof( saction )); - saction.sa_handler = Signal_Handler; + NGIRCd_SignalQuit = NGIRCd_SignalRestart = NGIRCd_SignalRehash = FALSE; + NGIRCd_NoDaemon = NGIRCd_Passive = FALSE; +#ifdef DEBUG + NGIRCd_Debug = FALSE; +#endif +#ifdef SNIFFER + NGIRCd_Sniffer = FALSE; +#endif + strlcpy( NGIRCd_ConfFile, SYSCONFDIR, sizeof( NGIRCd_ConfFile )); + strlcat( NGIRCd_ConfFile, CONFIG_FILE, sizeof( NGIRCd_ConfFile )); - /* Signal-Handler einhaengen */ - sigaction( SIGALRM, &saction, NULL ); - sigaction( SIGHUP, &saction, NULL); - sigaction( SIGINT, &saction, NULL ); - sigaction( SIGQUIT, &saction, NULL ); - sigaction( SIGTERM, &saction, NULL); - sigaction( SIGUSR1, &saction, NULL); - sigaction( SIGUSR2, &saction, NULL); - - /* Server-"Listen"-Socket initialisieren */ - memset( &my_addr, 0, sizeof( my_addr )); - my_addr.sin_family = AF_INET; - my_addr.sin_port = htons( 6668 ); - my_addr.sin_addr.s_addr = htonl( INADDR_ANY ); - - /* Socket erzeugen, ... */ - my_sock = socket( AF_INET, SOCK_STREAM, 0); - if( socket < 0 ) + /* Kommandozeile parsen */ + for( i = 1; i < argc; i++ ) { - Log( LOG_FATAL, "Can't create socket: %s", strerror( errno )); - exit( 1 ); + ok = FALSE; + if(( argv[i][0] == '-' ) && ( argv[i][1] == '-' )) + { + /* Lange Option */ + + if( strcmp( argv[i], "--config" ) == 0 ) + { + if( i + 1 < argc ) + { + /* Ok, there's an parameter left */ + strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile )); + + /* next parameter */ + i++; ok = TRUE; + } + } + if( strcmp( argv[i], "--configtest" ) == 0 ) + { + configtest = TRUE; + ok = TRUE; + } +#ifdef DEBUG + if( strcmp( argv[i], "--debug" ) == 0 ) + { + NGIRCd_Debug = TRUE; + ok = TRUE; + } +#endif + if( strcmp( argv[i], "--help" ) == 0 ) + { + Show_Version( ); + puts( "" ); Show_Help( ); puts( "" ); + exit( 1 ); + } + if( strcmp( argv[i], "--nodaemon" ) == 0 ) + { + NGIRCd_NoDaemon = TRUE; + ok = TRUE; + } + if( strcmp( argv[i], "--passive" ) == 0 ) + { + NGIRCd_Passive = TRUE; + ok = TRUE; + } +#ifdef SNIFFER + if( strcmp( argv[i], "--sniffer" ) == 0 ) + { + NGIRCd_Sniffer = TRUE; + ok = TRUE; + } +#endif + if( strcmp( argv[i], "--version" ) == 0 ) + { + Show_Version( ); + exit( 1 ); + } + } + else if(( argv[i][0] == '-' ) && ( argv[i][1] != '-' )) + { + /* Kurze Option */ + + for( n = 1; n < (LONG)strlen( argv[i] ); n++ ) + { + ok = FALSE; +#ifdef DEBUG + if( argv[i][n] == 'd' ) + { + NGIRCd_Debug = TRUE; + ok = TRUE; + } +#endif + if( argv[i][n] == 'f' ) + { + if(( ! argv[i][n + 1] ) && ( i + 1 < argc )) + { + /* Ok, next character is a blank */ + strlcpy( NGIRCd_ConfFile, argv[i + 1], sizeof( NGIRCd_ConfFile )); + + /* go to the following parameter */ + i++; n = (LONG)strlen( argv[i] ); + ok = TRUE; + } + } + if( argv[i][n] == 'n' ) + { + NGIRCd_NoDaemon = TRUE; + ok = TRUE; + } + if( argv[i][n] == 'p' ) + { + NGIRCd_Passive = TRUE; + ok = TRUE; + } +#ifdef SNIFFER + if( argv[i][n] == 's' ) + { + NGIRCd_Sniffer = TRUE; + ok = TRUE; + } +#endif + + if( ! ok ) + { + printf( "%s: invalid option \"-%c\"!\n", PACKAGE, argv[i][n] ); + printf( "Try \"%s --help\" for more information.\n", PACKAGE ); + exit( 1 ); + } + } + + } + if( ! ok ) + { + printf( "%s: invalid option \"%s\"!\n", PACKAGE, argv[i] ); + printf( "Try \"%s --help\" for more information.\n", PACKAGE ); + exit( 1 ); + } } - - /* ... an Port binden ... */ - if( bind( my_sock, (struct sockaddr *)&my_addr, (socklen_t)sizeof( my_addr )) < 0 ) + + /* Debug-Level (fuer IRC-Befehl "VERSION") ermitteln */ + strcpy( NGIRCd_DebugLevel, "" ); +#ifdef DEBUG + if( NGIRCd_Debug ) strcpy( NGIRCd_DebugLevel, "1" ); +#endif +#ifdef SNIFFER + if( NGIRCd_Sniffer ) { - Log( LOG_FATAL, "Can't bind socket: %s", strerror( errno )); - exit( 1 ); + NGIRCd_Debug = TRUE; + strcpy( NGIRCd_DebugLevel, "2" ); } +#endif - /* ... und in "listen mode" gehen :-) */ - if( listen( my_sock, 10 ) < 0 ) + /* Soll nur die Konfigurations ueberprueft und ausgegeben werden? */ + if( configtest ) { - Log( LOG_FATAL, "Can't listen on soecket: %s", strerror( errno )); - exit( 1 ); + Show_Version( ); puts( "" ); + exit( Conf_Test( )); } - /* Hauptschleife */ - while( ! do_quit_now ) + while( ! NGIRCd_SignalQuit ) { - /* auf Verbindung warten */ - a_sock_len = sizeof( a_addr ); - memset( &a_addr, 0, a_sock_len ); - a_sock = accept( my_sock, (struct sockaddr *)&a_addr, &a_sock_len ); - if( a_sock < 0 ) + /* In der Regel wird ein Sub-Prozess ge-fork()'t, der + * nicht mehr mit dem Terminal verbunden ist. Mit der + * Option "--nodaemon" kann dies (z.B. zum Debuggen) + * verhindert werden. */ + if( ! NGIRCd_NoDaemon ) { - if( errno == EINTR ) continue; - - Log( LOG_FATAL, "Can't accept connection: %s", strerror( errno )); - exit( 1 ); + /* Daemon im Hintergrund erzeugen */ + pid = (LONG)fork( ); + if( pid > 0 ) + { + /* "alter" Prozess */ + exit( 0 ); + } + if( pid < 0 ) + { + /* Fehler */ + printf( "%s: Can't fork: %s!\nFatal error, exiting now ...\n", PACKAGE, strerror( errno )); + exit( 1 ); + } + + /* Child-Prozess initialisieren */ + (VOID)setsid( ); + chdir( "/" ); } - Log( LOG_INFO, "Accepted connection from %s:%d.", inet_ntoa( a_addr.sin_addr ), ntohs( a_addr.sin_port)); - fd = fdopen( a_sock, "w" ); + + /* Globale Variablen initialisieren */ + NGIRCd_Start = time( NULL ); + (VOID)strftime( NGIRCd_StartStr, 64, "%a %b %d %Y at %H:%M:%S (%Z)", localtime( &NGIRCd_Start )); + NGIRCd_SignalRehash = FALSE; + NGIRCd_SignalRestart = FALSE; + NGIRCd_SignalQuit = FALSE; - fputs( "hello world!\n", fd ); fflush( fd ); + /* Module initialisieren */ + Log_Init( ); + Resolve_Init( ); + Conf_Init( ); + Lists_Init( ); + Channel_Init( ); + Client_Init( ); +#ifdef RENDEZVOUS + Rendezvous_Init( ); +#endif + Conn_Init( ); + + /* Wenn als root ausgefuehrt und eine andere UID + * konfiguriert ist, jetzt zu dieser wechseln */ + if( getuid( ) == 0 ) + { + if( Conf_GID != 0 ) + { + /* Neue Group-ID setzen */ + if( setgid( Conf_GID ) != 0 ) Log( LOG_ERR, "Can't change Group-ID to %u: %s", Conf_GID, strerror( errno )); + } + if( Conf_UID != 0 ) + { + /* Neue User-ID setzen */ + if( setuid( Conf_UID ) != 0 ) Log( LOG_ERR, "Can't change User-ID to %u: %s", Conf_UID, strerror( errno )); + } + } - fclose( fd ); - close( a_sock ); - } - - /* Aufraeumen (Sockets etc.!?) */ - close( my_sock ); - - Log_Exit( ); + /* User, Gruppe und Prozess-ID des Daemon ausgeben */ + pwd = getpwuid( getuid( )); grp = getgrgid( getgid( )); + Log( LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.", pwd ? pwd->pw_name : "unknown", (LONG)getuid( ), grp ? grp->gr_name : "unknown", (LONG)getgid( ), (LONG)getpid( )); + + /* stderr in "Error-File" umlenken */ + Log_InitErrorfile( ); + + /* Signal-Handler initialisieren */ + Initialize_Signal_Handler( ); + + /* Protokoll- und Server-Identifikation erzeugen. Die vom ngIRCd + * beim PASS-Befehl verwendete Syntax sowie die erweiterten Flags + * sind in doc/Protocol.txt beschrieben. */ +#ifdef IRCPLUS + sprintf( NGIRCd_ProtoID, "%s%s %s|%s:%s", PROTOVER, PROTOIRCPLUS, PACKAGE, VERSION, IRCPLUSFLAGS ); +#ifdef USE_ZLIB + strcat( NGIRCd_ProtoID, "Z" ); +#endif + if( Conf_OperCanMode ) strcat( NGIRCd_ProtoID, "o" ); +#else + sprintf( NGIRCd_ProtoID, "%s%s %s|%s", PROTOVER, PROTOIRC, PACKAGE, VERSION ); +#endif + strcat( NGIRCd_ProtoID, " P" ); +#ifdef USE_ZLIB + strcat( NGIRCd_ProtoID, "Z" ); +#endif + Log( LOG_DEBUG, "Protocol and server ID is \"%s\".", NGIRCd_ProtoID ); + + /* Vordefinierte Channels anlegen */ + Channel_InitPredefined( ); + + /* Listen-Ports initialisieren */ + if( Conn_InitListeners( ) < 1 ) + { + Log( LOG_ALERT, "Server isn't listening on a single port!" ); + Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE ); + exit( 1 ); + } + + /* Hauptschleife */ + Conn_Handler( ); + + /* Alles abmelden */ + Conn_Exit( ); +#ifdef RENDEZVOUS + Rendezvous_Exit( ); +#endif + Client_Exit( ); + Channel_Exit( ); + Lists_Exit( ); + Log_Exit( ); + } + return 0; } /* main */ -LOCAL VOID Signal_Handler( INT Signal ) +GLOBAL CHAR * +NGIRCd_Version( VOID ) +{ + STATIC CHAR version[126]; + +#ifdef CVSDATE + sprintf( version, "%s %s(%s)-%s", PACKAGE, VERSION, CVSDATE, NGIRCd_VersionAddition( )); +#else + sprintf( version, "%s %s-%s", PACKAGE, VERSION, NGIRCd_VersionAddition( )); +#endif + return version; +} /* NGIRCd_Version */ + + +GLOBAL CHAR * +NGIRCd_VersionAddition( VOID ) +{ + STATIC CHAR txt[200]; + + strcpy( txt, "" ); + +#ifdef USE_SYSLOG + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "SYSLOG" ); +#endif +#ifdef USE_ZLIB + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "ZLIB" ); +#endif +#ifdef USE_TCPWRAP + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "TCPWRAP" ); +#endif +#ifdef RENDEZVOUS + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "RENDEZVOUS" ); +#endif +#ifdef DEBUG + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "DEBUG" ); +#endif +#ifdef SNIFFER + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "SNIFFER" ); +#endif +#ifdef STRICT_RFC + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "RFC" ); +#endif +#ifdef IRCPLUS + if( txt[0] ) strcat( txt, "+" ); + strcat( txt, "IRCPLUS" ); +#endif + + if( txt[0] ) strlcat( txt, "-", sizeof( txt )); + strlcat( txt, TARGET_CPU, sizeof( txt )); + strlcat( txt, "/", sizeof( txt )); + strlcat( txt, TARGET_VENDOR, sizeof( txt )); + strlcat( txt, "/", sizeof( txt )); + strlcat( txt, TARGET_OS, sizeof( txt )); + + return txt; +} /* NGIRCd_VersionAddition */ + + +GLOBAL VOID +NGIRCd_Rehash( VOID ) +{ + CHAR old_name[CLIENT_ID_LEN]; + + Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" ); + NGIRCd_SignalRehash = FALSE; + + /* Alle Listen-Sockets schliessen */ + Conn_ExitListeners( ); + + /* Alten Server-Namen merken */ + assert( sizeof( old_name ) == sizeof( Conf_ServerName )); + strcpy( old_name, Conf_ServerName ); + + /* Konfiguration neu lesen ... */ + Conf_Rehash( ); + + /* Alten Server-Namen wiederherstellen: dieser + * kann nicht zur Laufzeit geaendert werden ... */ + if( strcmp( old_name, Conf_ServerName ) != 0 ) + { + strcpy( Conf_ServerName, old_name ); + Log( LOG_ERR, "Can't change \"ServerName\" on runtime! Ignored new name." ); + } + + /* neue pre-defined Channel anlegen: */ + Channel_InitPredefined( ); + + /* Listen-Sockets neu anlegen: */ + Conn_InitListeners( ); + + Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." ); +} /* NGIRCd_Rehash */ + + +LOCAL VOID +Initialize_Signal_Handler( VOID ) { + /* Signal-Handler initialisieren: einige Signale + * werden ignoriert, andere speziell behandelt. */ + +#ifdef HAVE_SIGACTION + /* sigaction() ist vorhanden */ + + struct sigaction saction; + + /* Signal-Struktur initialisieren */ + memset( &saction, 0, sizeof( saction )); + saction.sa_handler = Signal_Handler; +#ifdef SA_RESTART + saction.sa_flags |= SA_RESTART; +#endif +#ifdef SA_NOCLDWAIT + saction.sa_flags |= SA_NOCLDWAIT; +#endif + + /* Signal-Handler einhaengen */ + sigaction( SIGINT, &saction, NULL ); + sigaction( SIGQUIT, &saction, NULL ); + sigaction( SIGTERM, &saction, NULL); + sigaction( SIGHUP, &saction, NULL); + sigaction( SIGCHLD, &saction, NULL); + + /* einige Signale ignorieren */ + saction.sa_handler = SIG_IGN; + sigaction( SIGPIPE, &saction, NULL ); +#else + /* kein sigaction() vorhanden */ + + /* Signal-Handler einhaengen */ + signal( SIGINT, Signal_Handler ); + signal( SIGQUIT, Signal_Handler ); + signal( SIGTERM, Signal_Handler ); + signal( SIGHUP, Signal_Handler ); + signal( SIGCHLD, Signal_Handler ); + + /* einige Signale ignorieren */ + signal( SIGPIPE, SIG_IGN ); +#endif +} /* Initialize_Signal_Handler */ + + +LOCAL VOID +Signal_Handler( INT Signal ) +{ + /* Signal-Handler. Dieser wird aufgerufen, wenn eines der Signale eintrifft, + * fuer das wir uns registriert haben (vgl. Initialize_Signal_Handler). Die + * Nummer des eingetroffenen Signals wird der Funktion uebergeben. */ + switch( Signal ) { case SIGTERM: case SIGINT: case SIGQUIT: - Log( LOG_WARN, "Got signal %d, terminating now ...", Signal ); - do_quit_now = TRUE; + /* wir soll(t)en uns wohl beenden ... */ + NGIRCd_SignalQuit = TRUE; + break; + case SIGHUP: + /* Konfiguration neu einlesen: */ + NGIRCd_SignalRehash = TRUE; break; + case SIGCHLD: + /* Child-Prozess wurde beendet. Zombies vermeiden: */ + while( waitpid( -1, NULL, WNOHANG ) > 0); + break; +#ifdef DEBUG default: - Log( LOG_WARN, "Got signal %d! Ignored.", Signal ); + /* unbekanntes bzw. unbehandeltes Signal */ + Log( LOG_DEBUG, "Got signal %d! Ignored.", Signal ); +#endif } } /* Signal_Handler */ +LOCAL VOID +Show_Version( VOID ) +{ + puts( NGIRCd_Version( )); + puts( "Copyright (c)2001-2003 by Alexander Barton ()." ); + puts( "Homepage: \n" ); + puts( "This is free software; see the source for copying conditions. There is NO" ); + puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." ); +} /* Show_Version */ + + +LOCAL VOID +Show_Help( VOID ) +{ +#ifdef DEBUG + puts( " -d, --debug log extra debug messages" ); +#endif + puts( " -f, --config use file as configuration file" ); + puts( " -n, --nodaemon don't fork and don't detach from controlling terminal" ); + puts( " -p, --passive disable automatic connections to other servers" ); +#ifdef SNIFFER + puts( " -s, --sniffer enable network sniffer and display all IRC traffic" ); +#endif + puts( " --configtest read, validate and display configuration; then exit" ); + puts( " --version output version information and exit" ); + puts( " --help display this help and exit" ); +} /* Show_Help */ + + /* -eof- */