X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fconn.c;h=714ebe6f34e611c45e36596c8e7b0278d6380cad;hp=4eeec13ae75f2d9c7d828b57bbf1cb724e9d2e01;hb=c2f5399b516fba5ad973c46cc8838a16d0fa543b;hpb=1d8cb34bc88c8891a1d6a7c3a78ff78909e9f8bf diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c index 4eeec13a..714ebe6f 100644 --- a/src/ngircd/conn.c +++ b/src/ngircd/conn.c @@ -1,30 +1,35 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de) + * Copyright (c)2001-2005 Alexander Barton * - * 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 ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS. + * 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. * - * $Id: conn.c,v 1.99 2002/11/29 13:13:42 alex Exp $ - * - * connect.h: Verwaltung aller Netz-Verbindungen ("connections") + * Connection management */ +#define CONN_MODULE + #include "portab.h" +#include "io.h" + +static char UNUSED id[] = "$Id: conn.c,v 1.170 2005/08/15 23:02:40 alex Exp $"; #include "imp.h" #include -#include +#ifdef PROTOTYPES +# include +#else +# include +#endif #include #include #include #include -#include #include #include #include @@ -32,107 +37,185 @@ #include #include +#ifdef HAVE_NETINET_IP_H +# include +#endif + #ifdef HAVE_ARPA_INET_H -#include +# include #else -#define PF_INET AF_INET +# define PF_INET AF_INET #endif #ifdef HAVE_STDINT_H -#include /* u.a. fuer Mac OS X */ +# include /* e.g. for Mac OS X */ #endif -#ifdef USE_ZLIB -#include +#ifdef TCPWRAP +# include /* for TCP Wrappers */ #endif +#include "array.h" +#include "defines.h" +#include "resolve.h" + #include "exp.h" #include "conn.h" #include "imp.h" #include "ngircd.h" #include "client.h" -#include "resolve.h" #include "conf.h" +#include "conn-zip.h" +#include "conn-func.h" #include "log.h" #include "parse.h" #include "tool.h" +#ifdef ZEROCONF +# include "rendezvous.h" +#endif + #include "exp.h" #define SERVER_WAIT (NONE - 1) -#ifdef USE_ZLIB -typedef struct _ZipData -{ - z_stream in; /* "Handle" fuer Input-Stream */ - z_stream out; /* "Handle" fuer Output-Stream */ - CHAR rbuf[READBUFFER_LEN]; /* Lesepuffer */ - INT rdatalen; /* Laenge der Daten im Lesepuffer (komprimiert) */ - CHAR wbuf[WRITEBUFFER_LEN]; /* Schreibpuffer */ - INT wdatalen; /* Laenge der Daten im Schreibpuffer (unkomprimiert) */ - LONG bytes_in, bytes_out; /* Counter fuer Statistik (unkomprimiert!) */ -} ZIPDATA; +static bool Handle_Write PARAMS(( CONN_ID Idx )); +static int New_Connection PARAMS(( int Sock )); +static CONN_ID Socket2Index PARAMS(( int Sock )); +static void Read_Request PARAMS(( CONN_ID Idx )); +static bool Handle_Buffer PARAMS(( CONN_ID Idx )); +static void Check_Connections PARAMS(( void )); +static void Check_Servers PARAMS(( void )); +static void Init_Conn_Struct PARAMS(( CONN_ID Idx )); +static bool Init_Socket PARAMS(( int Sock )); +static void New_Server PARAMS(( int Server, CONN_ID Idx )); +static void Simple_Message PARAMS(( int Sock, char *Msg )); +static int Count_Connections PARAMS(( struct sockaddr_in addr )); +static int NewListener PARAMS(( const UINT16 Port )); + +static array My_Listeners; + +#ifdef TCPWRAP +int allow_severity = LOG_INFO; +int deny_severity = LOG_ERR; #endif +static void server_login PARAMS((CONN_ID idx)); + +static void cb_clientserver PARAMS((int sock, short what)); -typedef struct _Connection +static void +cb_listen(int sock, short irrelevant) { - INT sock; /* Socket Handle */ - struct sockaddr_in addr; /* Adresse des Client */ - RES_STAT *res_stat; /* "Resolver-Status", s.o. */ - CHAR host[HOST_LEN]; /* Hostname */ - CHAR rbuf[READBUFFER_LEN]; /* Lesepuffer */ - INT rdatalen; /* Laenge der Daten im Lesepuffer */ - CHAR wbuf[WRITEBUFFER_LEN]; /* Schreibpuffer */ - INT wdatalen; /* Laenge der Daten im Schreibpuffer */ - INT our_server; /* wenn von uns zu connectender Server: ID */ - time_t lastdata; /* Letzte Aktivitaet */ - time_t lastping; /* Letzter PING */ - time_t lastprivmsg; /* Letzte PRIVMSG */ - time_t delaytime; /* Nicht beachten bis ("penalty") */ - LONG bytes_in, bytes_out; /* Counter fuer Statistik */ - INT flag; /* "Markierungs-Flag" (vgl. "irc-write"-Modul) */ - INT options; /* Link-Optionen */ -#ifdef USE_ZLIB - ZIPDATA zip; /* Kompressionsinformationen */ + (void) irrelevant; + New_Connection( sock ); +} + + +static void +cb_connserver(int sock, UNUSED short what) +{ + int res, err; + socklen_t sock_len; + CLIENT *c; + CONN_ID idx = Socket2Index( sock ); + if (idx <= NONE) { +#ifdef DEBUG + Log(LOG_DEBUG, "cb_connserver wants to write on unknown socket?!"); #endif -} CONNECTION; - - -LOCAL VOID Handle_Read PARAMS(( INT sock )); -LOCAL BOOLEAN Handle_Write PARAMS(( CONN_ID Idx )); -LOCAL VOID New_Connection PARAMS(( INT Sock )); -LOCAL CONN_ID Socket2Index PARAMS(( INT Sock )); -LOCAL VOID Read_Request PARAMS(( CONN_ID Idx )); -LOCAL BOOLEAN Try_Write PARAMS(( CONN_ID Idx )); -LOCAL BOOLEAN Handle_Buffer PARAMS(( CONN_ID Idx )); -LOCAL VOID Check_Connections PARAMS(( VOID )); -LOCAL VOID Check_Servers PARAMS(( VOID )); -LOCAL VOID Init_Conn_Struct PARAMS(( LONG Idx )); -LOCAL BOOLEAN Init_Socket PARAMS(( INT Sock )); -LOCAL VOID New_Server PARAMS(( INT Server, CONN_ID Idx )); -LOCAL VOID Read_Resolver_Result PARAMS(( INT r_fd )); - -#ifdef USE_ZLIB -LOCAL BOOLEAN Zip_Buffer PARAMS(( CONN_ID Idx, CHAR *Data, INT Len )); -LOCAL BOOLEAN Zip_Flush PARAMS(( CONN_ID Idx )); -LOCAL BOOLEAN Unzip_Buffer PARAMS(( CONN_ID Idx )); + io_close(sock); + return; + } + + assert( what & IO_WANTWRITE); + + /* connect() finished, get result. */ + sock_len = sizeof( err ); + res = getsockopt( My_Connections[idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len ); + assert( sock_len == sizeof( err )); + + /* Fehler aufgetreten? */ + if(( res != 0 ) || ( err != 0 )) { + if ( res != 0 ) + Log( LOG_CRIT, "getsockopt (connection %d): %s!", idx, strerror( errno )); + else + Log( LOG_CRIT, "Can't connect socket to \"%s:%d\" (connection %d): %s!", + My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port, + idx, strerror( err )); + + /* Clean up socket, connection and client structures */ + c = Client_GetFromConn( idx ); + if( c ) Client_DestroyNow( c ); + io_close( My_Connections[idx].sock ); + Init_Conn_Struct( idx ); + + /* Bei Server-Verbindungen lasttry-Zeitpunkt auf "jetzt" setzen */ + Conf_Server[Conf_GetServer( idx )].lasttry = time( NULL ); + Conf_UnsetServer( idx ); + return; + } + + Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING ); + server_login(idx); +} + + +static void +server_login(CONN_ID idx) +{ + Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx, + My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port ); + + io_event_setcb( My_Connections[idx].sock, cb_clientserver); + io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE); + + /* Send PASS and SERVER command to peer */ + Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID ); + Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo ); +} + + +static void +cb_clientserver(int sock, short what) +{ + CONN_ID idx = Socket2Index( sock ); + if (idx <= NONE) { +#ifdef DEBUG + Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!"); #endif + io_close(sock); + return; + } + + if (what & IO_WANTREAD) + Read_Request( idx ); + + if (what & IO_WANTWRITE) + Handle_Write( idx ); +} + + +static void +FreeRes_stat( CONNECTION *c ) +{ + assert( c != NULL ); + assert( c->res_stat != NULL ); + if (!c->res_stat) return; -LOCAL fd_set My_Listeners; -LOCAL fd_set My_Sockets; -LOCAL fd_set My_Connects; + io_close( c->res_stat->pipe[0] ); -LOCAL CONNECTION *My_Connections; -LOCAL LONG Pool_Size; + array_free(&c->res_stat->buffer); + free( c->res_stat ); + c->res_stat = NULL; +} -GLOBAL VOID -Conn_Init( VOID ) +GLOBAL void +Conn_Init( void ) { /* Modul initialisieren: statische Strukturen "ausnullen". */ @@ -145,145 +228,185 @@ Conn_Init( VOID ) /* konfiguriertes Limit beachten */ if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections; } - My_Connections = malloc( sizeof( CONNECTION ) * Pool_Size ); + My_Connections = (CONNECTION *) calloc( Pool_Size, sizeof( CONNECTION ) ); if( ! My_Connections ) { /* Speicher konnte nicht alloziert werden! */ Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" ); exit( 1 ); } - Log( LOG_DEBUG, "Allocted connection pool for %ld items.", Pool_Size ); +#ifdef DEBUG + Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size ); +#endif - /* zu Beginn haben wir keine Verbindungen */ - FD_ZERO( &My_Listeners ); - FD_ZERO( &My_Sockets ); - FD_ZERO( &My_Connects ); + array_free( &My_Listeners ); /* Groesster File-Descriptor fuer select() */ Conn_MaxFD = 0; /* Connection-Struktur initialisieren */ for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i ); + + /* Global write counter */ + WCounter = 0; } /* Conn_Init */ -GLOBAL VOID -Conn_Exit( VOID ) +GLOBAL void +Conn_Exit( void ) { /* Modul abmelden: alle noch offenen Connections * schliessen und freigeben. */ CONN_ID idx; - INT i; - /* Sockets schliessen */ +#ifdef DEBUG Log( LOG_DEBUG, "Shutting down all connections ..." ); - for( i = 0; i < Conn_MaxFD + 1; i++ ) - { - if( FD_ISSET( i, &My_Sockets )) - { - for( idx = 0; idx < Pool_Size; idx++ ) - { - if( My_Connections[idx].sock == i ) break; - } - if( FD_ISSET( i, &My_Listeners )) - { - close( i ); - Log( LOG_DEBUG, "Listening socket %d closed.", i ); - } - else if( FD_ISSET( i, &My_Connects )) - { - close( i ); - Log( LOG_DEBUG, "Connection %d closed during creation (socket %d).", idx, i ); - } - else if( idx < Pool_Size ) - { - if( NGIRCd_Restart ) Conn_Close( idx, NULL, "Server going down (restarting)", TRUE ); - else Conn_Close( idx, NULL, "Server going down", TRUE ); - } - else - { - Log( LOG_WARNING, "Closing unknown connection %d ...", i ); - close( i ); - } +#endif + + Conn_ExitListeners(); + + /* Sockets schliessen */ + for( idx = 0; idx < Pool_Size; idx++ ) { + if( My_Connections[idx].sock > NONE ) { + Conn_Close( idx, NULL, NGIRCd_SignalRestart ? + "Server going down (restarting)":"Server going down", true ); + continue; } } - + free( My_Connections ); My_Connections = NULL; Pool_Size = 0; + io_library_shutdown(); } /* Conn_Exit */ -GLOBAL INT -Conn_InitListeners( VOID ) +static unsigned int +ports_initlisteners(array *a, void (*func)(int,short)) +{ + unsigned int created = 0, len; + int fd; + UINT16 *port; + + len = array_length(a, sizeof (UINT16)); + port = array_start(a); + while(len--) { + fd = NewListener( *port ); + if (fd < 0) { + port++; + continue; + } + if (!io_event_create( fd, IO_WANTREAD, func )) { + Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!", + fd, (unsigned int) *port, strerror(errno)); + close(fd); + port++; + continue; + } + created++; + port++; + } + + return created; +} + + +GLOBAL int +Conn_InitListeners( void ) { - /* Ports, auf denen der Server Verbindungen entgegennehmen - * soll, initialisieren */ + /* Initialize ports on which the server should accept connections */ - INT created, i; + unsigned int created; - created = 0; - for( i = 0; i < Conf_ListenPorts_Count; i++ ) - { - if( Conn_NewListener( Conf_ListenPorts[i] )) created++; - else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] ); + if (!io_library_init(CONNECTION_POOL)) { + Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno)); + return -1; } + + created = ports_initlisteners(&Conf_ListenPorts, cb_listen); + return created; } /* Conn_InitListeners */ -GLOBAL VOID -Conn_ExitListeners( VOID ) +GLOBAL void +Conn_ExitListeners( void ) { - /* Alle "Listen-Sockets" schliessen */ - - INT i; + /* Close down all listening sockets */ + int *fd; + unsigned int arraylen; +#ifdef ZEROCONF + Rendezvous_UnregisterListeners( ); +#endif - Log( LOG_INFO, "Shutting down all listening sockets ..." ); - for( i = 0; i < Conn_MaxFD + 1; i++ ) - { - if( FD_ISSET( i, &My_Sockets ) && FD_ISSET( i, &My_Listeners )) - { - close( i ); - Log( LOG_DEBUG, "Listening socket %d closed.", i ); + arraylen = array_length(&My_Listeners, sizeof (int)); + Log( LOG_INFO, "Shutting down all listening sockets (%d)...", arraylen ); + while(arraylen--) { + fd = (int*) array_get(&My_Listeners, sizeof (int), arraylen); + if (fd) { + close(*fd); +#ifdef DEBUG + Log( LOG_DEBUG, "Listening socket %d closed.", *fd ); + } else { + Log( LOG_DEBUG, "array_get pos %d returned NULL", arraylen ); +#endif } } + array_free(&My_Listeners); } /* Conn_ExitListeners */ -GLOBAL BOOLEAN -Conn_NewListener( CONST UINT Port ) +/* return new listening port file descriptor or -1 on failure */ +static int +NewListener( const UINT16 Port ) { - /* Neuen Listen-Socket erzeugen: der Server wartet dann auf - * dem angegebenen Port auf Verbindungen. Kann der Listen- - * Socket nicht erteugt werden, so wird NULL geliefert.*/ + /* Create new listening socket on specified port */ struct sockaddr_in addr; - INT sock; + struct in_addr inaddr; + int sock; +#ifdef ZEROCONF + char name[CLIENT_ID_LEN], *info; +#endif /* Server-"Listen"-Socket initialisieren */ memset( &addr, 0, sizeof( addr )); + memset( &inaddr, 0, sizeof( inaddr )); addr.sin_family = AF_INET; addr.sin_port = htons( Port ); - addr.sin_addr.s_addr = htonl( INADDR_ANY ); + if( Conf_ListenAddress[0] ) + { +#ifdef HAVE_INET_ATON + if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 ) +#else + inaddr.s_addr = inet_addr( Conf_ListenAddress ); + if( inaddr.s_addr == (unsigned)-1 ) +#endif + { + Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!", Conf_ListenAddress, Port, Conf_ListenAddress ); + return -1; + } + } + else inaddr.s_addr = htonl( INADDR_ANY ); + addr.sin_addr = inaddr; /* Socket erzeugen */ sock = socket( PF_INET, SOCK_STREAM, 0); if( sock < 0 ) { Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno )); - return FALSE; + return -1; } - if( ! Init_Socket( sock )) return FALSE; + if( ! Init_Socket( sock )) return -1; /* an Port binden */ if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 ) { Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno )); close( sock ); - return FALSE; + return -1; } /* in "listen mode" gehen :-) */ @@ -291,179 +414,175 @@ Conn_NewListener( CONST UINT Port ) { Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno )); close( sock ); - return FALSE; + return -1; } /* Neuen Listener in Strukturen einfuegen */ - FD_SET( sock, &My_Listeners ); - FD_SET( sock, &My_Sockets ); + if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) { + Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno )); + close( sock ); + return -1; + } - if( sock > Conn_MaxFD ) Conn_MaxFD = sock; + if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock ); + else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock ); - Log( LOG_INFO, "Now listening on port %d (socket %d).", Port, sock ); +#ifdef ZEROCONF + /* Get best server description text */ + if( ! Conf_ServerInfo[0] ) info = Conf_ServerName; + else + { + /* Use server info string */ + info = NULL; + if( Conf_ServerInfo[0] == '[' ) + { + /* Cut off leading hostname part in "[]" */ + info = strchr( Conf_ServerInfo, ']' ); + if( info ) + { + info++; + while( *info == ' ' ) info++; + } + } + if( ! info ) info = Conf_ServerInfo; + } - return TRUE; -} /* Conn_NewListener */ + /* Add port number to description if non-standard */ + if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port ); + else strlcpy( name, info, sizeof( name )); + + /* Register service */ + Rendezvous_Register( name, MDNS_TYPE, Port ); +#endif + return sock; +} /* NewListener */ -GLOBAL VOID -Conn_Handler( VOID ) +GLOBAL void +Conn_Handler( void ) { - /* "Hauptschleife": Aktive Verbindungen ueberwachen. Folgende Aktionen - * werden dabei durchgefuehrt, bis der Server terminieren oder neu - * starten soll: - * - * - neue Verbindungen annehmen, - * - Server-Verbindungen aufbauen, - * - geschlossene Verbindungen loeschen, - * - volle Schreibpuffer versuchen zu schreiben, - * - volle Lesepuffer versuchen zu verarbeiten, - * - Antworten von Resolver Sub-Prozessen annehmen. + /* "Main Loop.": Loop until a signal (for shutdown or restart) arrives. + * Call io_dispatch() to check for read/writeable sockets every second + * Wait for status change on pending connections (e.g: when the hostname has been resolved) + * check for penalty/timeouts + * handle input buffers */ - - fd_set read_sockets, write_sockets; + int i; + unsigned int wdatalen; struct timeval tv; time_t start, t; - LONG i, idx; - BOOLEAN timeout; + bool timeout; start = time( NULL ); - while(( ! NGIRCd_Quit ) && ( ! NGIRCd_Restart )) + while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart )) { - timeout = TRUE; - - Check_Servers( ); + timeout = true; + +#ifdef ZEROCONF + Rendezvous_Handler( ); +#endif + + /* Should the configuration be reloaded? */ + if( NGIRCd_SignalRehash ) NGIRCd_Rehash( ); + /* Check configured servers and established links */ + Check_Servers( ); Check_Connections( ); + t = time( NULL ); + /* noch volle Lese-Buffer suchen */ for( i = 0; i < Pool_Size; i++ ) { - if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 )) + if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) && + ( My_Connections[i].delaytime < t )) { /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */ - if( Handle_Buffer( i )) timeout = FALSE; + if (Handle_Buffer( i )) timeout = false; } } /* noch volle Schreib-Puffer suchen */ - FD_ZERO( &write_sockets ); - for( i = 0; i < Pool_Size; i++ ) - { -#ifdef USE_ZLIB - if(( My_Connections[i].sock > NONE ) && (( My_Connections[i].wdatalen > 0 ) || ( My_Connections[i].zip.wdatalen > 0 ))) + for( i = 0; i < Pool_Size; i++ ) { + if ( My_Connections[i].sock <= NONE ) + continue; + + wdatalen = array_bytes(&My_Connections[i].wbuf); + +#ifdef ZLIB + if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 )) #else - if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].wdatalen > 0 )) + if ( wdatalen > 0 ) #endif { /* Socket der Verbindung in Set aufnehmen */ - FD_SET( My_Connections[i].sock, &write_sockets ); + io_event_add( My_Connections[i].sock, IO_WANTWRITE ); } } - /* Sockets mit im Aufbau befindlichen ausgehenden Verbindungen suchen */ - for( i = 0; i < Pool_Size; i++ ) - { - if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects ))) FD_SET( My_Connections[i].sock, &write_sockets ); - } /* von welchen Sockets koennte gelesen werden? */ - t = time( NULL ); - read_sockets = My_Sockets; - for( i = 0; i < Pool_Size; i++ ) - { - if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].host[0] == '\0' )) - { - /* Hier muss noch auf den Resolver Sub-Prozess gewartet werden */ - FD_CLR( My_Connections[i].sock, &read_sockets ); - } - if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects ))) - { - /* Hier laeuft noch ein asyncrones connect() */ - FD_CLR( My_Connections[i].sock, &read_sockets ); + for (i = 0; i < Pool_Size; i++ ) { + if ( My_Connections[i].sock <= NONE ) + continue; + + if ( My_Connections[i].res_stat ) { + /* wait for completion of Resolver Sub-Process */ + io_event_del( My_Connections[i].sock, IO_WANTREAD ); + continue; } - if( My_Connections[i].delaytime > t ) - { + + if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING )) + continue; /* wait for completion of connect() */ + + if( My_Connections[i].delaytime > t ) { /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */ - FD_CLR( My_Connections[i].sock, &read_sockets ); - FD_CLR( My_Connections[i].sock, &write_sockets ); - } - } - for( i = 0; i < Conn_MaxFD + 1; i++ ) - { - /* Pipes von Resolver Sub-Prozessen aufnehmen */ - if( FD_ISSET( i, &Resolver_FDs )) - { - FD_SET( i, &read_sockets ); + io_event_del( My_Connections[i].sock, IO_WANTREAD ); + continue; } + io_event_add( My_Connections[i].sock, IO_WANTREAD ); } /* Timeout initialisieren */ tv.tv_usec = 0; - if( timeout ) tv.tv_sec = TIME_RES; + if( timeout ) tv.tv_sec = 1; else tv.tv_sec = 0; - - /* Auf Aktivitaet warten */ - i = select( Conn_MaxFD + 1, &read_sockets, &write_sockets, NULL, &tv ); - if( i == 0 ) - { - /* keine Veraenderung an den Sockets */ - continue; - } - if( i == -1 ) - { - /* Fehler (z.B. Interrupt) */ - if( errno != EINTR ) - { - Log( LOG_EMERG, "Conn_Handler(): select(): %s!", strerror( errno )); - Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE ); - exit( 1 ); - } - continue; - } - /* Koennen Daten geschrieben werden? */ - for( i = 0; i < Conn_MaxFD + 1; i++ ) - { - if( ! FD_ISSET( i, &write_sockets )) continue; - - /* Es kann geschrieben werden ... */ - idx = Socket2Index( i ); - if( idx == NONE ) continue; - - if( ! Handle_Write( idx )) - { - /* Fehler beim Schreiben! Diesen Socket nun - * auch aus dem Read-Set entfernen: */ - FD_CLR( i, &read_sockets ); - } - } - - /* Daten zum Lesen vorhanden? */ - for( i = 0; i < Conn_MaxFD + 1; i++ ) - { - if( FD_ISSET( i, &read_sockets )) Handle_Read( i ); + /* Auf Aktivitaet warten */ + i = io_dispatch( &tv ); + if (i == -1 && errno != EINTR ) { + Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno)); + Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME); + exit( 1 ); } } + + if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" ); + else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" ); } /* Conn_Handler */ +/** + * Write a text string into the socket of a connection. + * This function automatically appends CR+LF to the string and validates that + * the result is a valid IRC message (oversized messages are shortened, for + * example). Then it calls the Conn_Write() function to do the actual sending. + * @param Idx Index fo the connection. + * @param Format Format string, see printf(). + * @return true on success, false otherwise. + */ #ifdef PROTOTYPES -GLOBAL BOOLEAN -Conn_WriteStr( CONN_ID Idx, CHAR *Format, ... ) +GLOBAL bool +Conn_WriteStr( CONN_ID Idx, char *Format, ... ) #else -GLOBAL BOOLEAN +GLOBAL bool Conn_WriteStr( Idx, Format, va_alist ) CONN_ID Idx; -CHAR *Format; +char *Format; va_dcl #endif { - /* String in Socket schreiben. CR+LF wird von dieser Funktion - * automatisch angehaengt. Im Fehlerfall wird dir Verbindung - * getrennt und FALSE geliefert. */ - - CHAR buffer[COMMAND_LEN]; - BOOLEAN ok; + char buffer[COMMAND_LEN]; + bool ok; va_list ap; assert( Idx > NONE ); @@ -474,30 +593,53 @@ va_dcl #else va_start( ap ); #endif - if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) == COMMAND_LEN - 2 ) - { - Log( LOG_CRIT, "Text too long to send (connection %d)!", Idx ); - Conn_Close( Idx, "Text too long to send!", NULL, FALSE ); - return FALSE; + if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) { + /* + * The string that should be written to the socket is longer + * than the allowed size of COMMAND_LEN bytes (including both + * the CR and LF characters). This can be caused by the + * IRC_WriteXXX() functions when the prefix of this server had + * to be added to an already "quite long" command line which + * has been received from a regular IRC client, for example. + * + * We are not allowed to send such "oversized" messages to + * other servers and clients, see RFC 2812 2.3 and 2813 3.3 + * ("these messages SHALL NOT exceed 512 characters in length, + * counting all characters including the trailing CR-LF"). + * + * So we have a big problem here: we should send more bytes + * to the network than we are allowed to and we don't know + * the originator (any more). The "old" behaviour of blaming + * the receiver ("next hop") is a bad idea (it could be just + * an other server only routing the message!), so the only + * option left is to shorten the string and to hope that the + * result is still somewhat useful ... + * -alex- + */ + + strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1, + CUT_TXTSUFFIX); } #ifdef SNIFFER - if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer ); + if (NGIRCd_Sniffer) + Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer); #endif - strcat( buffer, "\r\n" ); + strlcat( buffer, "\r\n", sizeof( buffer )); ok = Conn_Write( Idx, buffer, strlen( buffer )); + My_Connections[Idx].msg_out++; va_end( ap ); return ok; } /* Conn_WriteStr */ -GLOBAL BOOLEAN -Conn_Write( CONN_ID Idx, CHAR *Data, INT Len ) +GLOBAL bool +Conn_Write( CONN_ID Idx, char *Data, unsigned int Len ) { /* Daten in Socket schreiben. Bei "fatalen" Fehlern wird - * der Client disconnectiert und FALSE geliefert. */ + * der Client disconnectiert und false geliefert. */ assert( Idx > NONE ); assert( Data != NULL ); @@ -509,554 +651,317 @@ Conn_Write( CONN_ID Idx, CHAR *Data, INT Len ) * In diesem Fall wird hier einfach ein Fehler geliefert. */ if( My_Connections[Idx].sock <= NONE ) { +#ifdef DEBUG Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx ); - return FALSE; +#endif + return false; } /* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es, * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den * Socket zu schreiben (u.a. wg. Komprimierung). */ - if( WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - Len <= 0 ) - { + if( array_bytes(&My_Connections[Idx].wbuf) >= WRITEBUFFER_LEN) { /* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */ - if( ! Try_Write( Idx )) return FALSE; + if( ! Handle_Write( Idx )) return false; - /* nun neu pruefen: */ - if( WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - Len <= 0 ) - { + /* check again: if our writebuf is twice als large as the initial limit: Kill connection */ + if( array_bytes(&My_Connections[Idx].wbuf) >= (WRITEBUFFER_LEN*2)) { Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx ); - Conn_Close( Idx, "Write buffer overflow!", NULL, FALSE ); - return FALSE; + Conn_Close( Idx, "Write buffer overflow!", NULL, false ); + return false; } } -#ifdef USE_ZLIB - if( My_Connections[Idx].options & CONN_ZIP ) - { +#ifdef ZLIB + if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) { /* Daten komprimieren und in Puffer kopieren */ - if( ! Zip_Buffer( Idx, Data, Len )) return FALSE; + if( ! Zip_Buffer( Idx, Data, Len )) return false; } else #endif { /* Daten in Puffer kopieren */ - memcpy( My_Connections[Idx].wbuf + My_Connections[Idx].wdatalen, Data, Len ); - My_Connections[Idx].wdatalen += Len; + if (!array_catb( &My_Connections[Idx].wbuf, Data, Len )) + return false; + My_Connections[Idx].bytes_out += Len; } - return TRUE; + /* Adjust global write counter */ + WCounter += Len; + + return true; } /* Conn_Write */ -GLOBAL VOID -Conn_Close( CONN_ID Idx, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN InformClient ) +GLOBAL void +Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient ) { - /* Verbindung schliessen. Evtl. noch von Resolver - * Sub-Prozessen offene Pipes werden geschlossen. */ + /* Close connection. Open pipes of asyncronous resolver + * sub-processes are closed down. */ CLIENT *c; - DOUBLE in_k, out_k; -#ifdef USE_ZLIB - DOUBLE in_z_k, out_z_k; - INT in_p, out_p; + char *txt; + double in_k, out_k; +#ifdef ZLIB + double in_z_k, out_z_k; + int in_p, out_p; #endif assert( Idx > NONE ); - assert( My_Connections[Idx].sock > NONE ); - c = Client_GetFromConn( Idx ); - - if( InformClient ) - { -#ifndef STRICT_RFC - /* Statistik an Client melden, wenn User */ - if(( c != NULL ) && ( Client_Type( c ) == CLIENT_USER )) - { - Conn_WriteStr( Idx, "NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.", Client_ThisServer( ), NOTICE_TXTPREFIX, (DOUBLE)My_Connections[Idx].bytes_in / 1024, (DOUBLE)My_Connections[Idx].bytes_out / 1024 ); - } + /* Is this link already shutting down? */ + if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) { + /* Conn_Close() has been called recursively for this link; + * probabe reason: Handle_Write() failed -- see below. */ +#ifdef DEBUG + Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx ); #endif - - /* ERROR an Client schicken (von RFC so vorgesehen!) */ - if( FwdMsg ) Conn_WriteStr( Idx, "ERROR :%s", FwdMsg ); - else Conn_WriteStr( Idx, "ERROR :Closing connection." ); - if( My_Connections[Idx].sock == NONE ) return; + return; } - /* zunaechst versuchen, noch im Schreibpuffer vorhandene - * Daten auf den Socket zu schreiben ... */ - Try_Write( Idx ); - - if( close( My_Connections[Idx].sock ) != 0 ) - { - Log( LOG_ERR, "Error closing connection %d (socket %d) with %s:%d - %s!", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port), strerror( errno )); - } - else - { - in_k = (DOUBLE)My_Connections[Idx].bytes_in / 1024; - out_k = (DOUBLE)My_Connections[Idx].bytes_out / 1024; -#ifdef USE_ZLIB - if( My_Connections[Idx].options & CONN_ZIP ) - { - in_z_k = (DOUBLE)My_Connections[Idx].zip.bytes_in / 1024; - out_z_k = (DOUBLE)My_Connections[Idx].zip.bytes_out / 1024; - in_p = (INT)(( in_k * 100 ) / in_z_k ); - out_p = (INT)(( out_k * 100 ) / out_z_k ); - Log( LOG_INFO, "Connection %d (socket %d) with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, in_z_k, in_p, out_k, out_z_k, out_p ); - } - else -#endif - { - Log( LOG_INFO, "Connection %d (socket %d) with %s:%d closed (in: %.1fk, out: %.1fk).", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, out_k ); - } - } - - /* Socket als "ungueltig" markieren */ - FD_CLR( My_Connections[Idx].sock, &My_Sockets ); - FD_CLR( My_Connections[Idx].sock, &My_Connects ); - My_Connections[Idx].sock = NONE; + assert( My_Connections[Idx].sock > NONE ); - if( c ) Client_Destroy( c, LogMsg, FwdMsg, TRUE ); + /* Mark link as "closing" */ + Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING ); + + if( LogMsg ) txt = LogMsg; + else txt = FwdMsg; + if( ! txt ) txt = "Reason unknown"; - if( My_Connections[Idx].res_stat ) - { - /* Resolver-Strukturen freigeben, wenn noch nicht geschehen */ - FD_CLR( My_Connections[Idx].res_stat->pipe[0], &Resolver_FDs ); - close( My_Connections[Idx].res_stat->pipe[0] ); - close( My_Connections[Idx].res_stat->pipe[1] ); - free( My_Connections[Idx].res_stat ); - } + Log( LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx, LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port )); - /* Startzeit des naechsten Connect-Versuchs modifizieren? */ - if(( My_Connections[Idx].our_server > NONE ) && ( Conf_Server[My_Connections[Idx].our_server].lasttry < time( NULL ) - Conf_ConnectRetry )) - { - /* Okay, die Verbindung stand schon "genuegend lange": - * lasttry-Zeitpunkt so setzen, dass der naechste - * Verbindungsversuch in RECONNECT_DELAY Sekunden - * gestartet wird. */ - Conf_Server[My_Connections[Idx].our_server].lasttry = time( NULL ) - Conf_ConnectRetry + RECONNECT_DELAY; - } + /* Search client, if any */ + c = Client_GetFromConn( Idx ); -#ifdef USE_ZLIB - /* Ggf. zlib abmelden */ - if( Conn_Options( Idx ) & CONN_ZIP ) - { - inflateEnd( &My_Connections[Idx].zip.in ); - deflateEnd( &My_Connections[Idx].zip.out ); - } + /* Should the client be informed? */ + if (InformClient) { +#ifndef STRICT_RFC + /* Send statistics to client if registered as user: */ + if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) { + Conn_WriteStr( Idx, + "NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.", + Client_ID(Client_ThisServer()), NOTICE_TXTPREFIX, + (double)My_Connections[Idx].bytes_in / 1024, + (double)My_Connections[Idx].bytes_out / 1024); + } #endif - /* Connection-Struktur loeschen (=freigeben) */ - Init_Conn_Struct( Idx ); -} /* Conn_Close */ - - -GLOBAL VOID -Conn_UpdateIdle( CONN_ID Idx ) -{ - /* Idle-Timer zuruecksetzen */ - - assert( Idx > NONE ); - My_Connections[Idx].lastprivmsg = time( NULL ); -} - - -GLOBAL time_t -Conn_GetIdle( CONN_ID Idx ) -{ - /* Idle-Time einer Verbindung liefern (in Sekunden) */ - - assert( Idx > NONE ); - return time( NULL ) - My_Connections[Idx].lastprivmsg; -} /* Conn_GetIdle */ - - -GLOBAL time_t -Conn_LastPing( CONN_ID Idx ) -{ - /* Zeitpunkt des letzten PING liefern */ - - assert( Idx > NONE ); - return My_Connections[Idx].lastping; -} /* Conn_LastPing */ - - -GLOBAL VOID -Conn_SetPenalty( CONN_ID Idx, time_t Seconds ) -{ - /* Penalty-Delay fuer eine Verbindung (in Sekunden) setzen; - * waehrend dieser Zeit wird der entsprechende Socket vom Server - * bei Lese-Operationen komplett ignoriert. Der Delay kann mit - * dieser Funktion nur erhoeht, nicht aber verringert werden. */ - - time_t t; - - assert( Idx > NONE ); - assert( Seconds >= 0 ); - - t = time( NULL ) + Seconds; - if( t > My_Connections[Idx].delaytime ) My_Connections[Idx].delaytime = t; -} /* Conn_SetPenalty */ - - -GLOBAL VOID -Conn_ResetPenalty( CONN_ID Idx ) -{ - assert( Idx > NONE ); - My_Connections[Idx].delaytime = 0; -} /* Conn_ResetPenalty */ - - -GLOBAL VOID -Conn_ClearFlags( VOID ) -{ - /* Alle Connection auf "nicht-markiert" setzen */ - - LONG i; - - for( i = 0; i < Pool_Size; i++ ) My_Connections[i].flag = 0; -} /* Conn_ClearFlags */ - - -GLOBAL INT -Conn_Flag( CONN_ID Idx ) -{ - /* Ist eine Connection markiert (TRUE) oder nicht? */ - - assert( Idx > NONE ); - return My_Connections[Idx].flag; -} /* Conn_Flag */ - - -GLOBAL VOID -Conn_SetFlag( CONN_ID Idx, INT Flag ) -{ - /* Connection markieren */ - - assert( Idx > NONE ); - My_Connections[Idx].flag = Flag; -} /* Conn_SetFlag */ - - -GLOBAL CONN_ID -Conn_First( VOID ) -{ - /* Connection-Struktur der ersten Verbindung liefern; - * Ist keine Verbindung vorhanden, wird NONE geliefert. */ - - LONG i; - - for( i = 0; i < Pool_Size; i++ ) - { - if( My_Connections[i].sock != NONE ) return i; + /* Send ERROR to client (see RFC!) */ + if (FwdMsg) + Conn_WriteStr(Idx, "ERROR :%s", FwdMsg); + else + Conn_WriteStr(Idx, "ERROR :Closing connection."); } - return NONE; -} /* Conn_First */ + /* Try to write out the write buffer */ + (void)Handle_Write( Idx ); -GLOBAL CONN_ID -Conn_Next( CONN_ID Idx ) -{ - /* Naechste Verbindungs-Struktur liefern; existiert keine - * weitere, so wird NONE geliefert. */ - - LONG i = NONE; - - assert( Idx > NONE ); - - for( i = Idx + 1; i < Pool_Size; i++ ) + /* Shut down socket */ + if( ! io_close( My_Connections[Idx].sock )) { - if( My_Connections[i].sock != NONE ) return i; + /* Oops, we can't close the socket!? This is ... ugly! */ + Log( LOG_CRIT, "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port), strerror( errno )); } - return NONE; -} /* Conn_Next */ - - -GLOBAL VOID -Conn_SetServer( CONN_ID Idx, INT ConfServer ) -{ - /* Connection als Server markieren: Index des konfigurierten - * Servers speichern. Verbindung muss bereits bestehen! */ - - assert( Idx > NONE ); - assert( My_Connections[Idx].sock > NONE ); - - My_Connections[Idx].our_server = ConfServer; -} /* Conn_SetServer */ - - -GLOBAL VOID -Conn_SetOption( CONN_ID Idx, INT Option ) -{ - /* Option fuer Verbindung setzen. - * Initial sind alle Optionen _nicht_ gesetzt. */ - - assert( Idx > NONE ); - assert( Option != 0 ); - - My_Connections[Idx].options |= Option; -} /* Conn_SetOption */ - - -GLOBAL VOID -Conn_UnsetOption( CONN_ID Idx, INT Option ) -{ - /* Option fuer Verbindung loeschen */ - - assert( Idx > NONE ); - assert( Option != 0 ); - - My_Connections[Idx].options &= ~Option; -} /* Conn_UnsetOption */ - - -GLOBAL INT -Conn_Options( CONN_ID Idx ) -{ - assert( Idx > NONE ); - return My_Connections[Idx].options; -} /* Conn_Options */ - - -#ifdef USE_ZLIB - -GLOBAL BOOLEAN -Conn_InitZip( CONN_ID Idx ) -{ - /* Kompression fuer Link initialisieren */ - - assert( Idx > NONE ); - - My_Connections[Idx].zip.in.avail_in = 0; - My_Connections[Idx].zip.in.total_in = 0; - My_Connections[Idx].zip.in.total_out = 0; - My_Connections[Idx].zip.in.zalloc = NULL; - My_Connections[Idx].zip.in.zfree = NULL; - My_Connections[Idx].zip.in.data_type = Z_ASCII; - - if( inflateInit( &My_Connections[Idx].zip.in ) != Z_OK ) - { - /* Fehler! */ - Log( LOG_ALERT, "Can't initialize compression on connection %d (zlib inflate)!", Idx ); - return FALSE; - } - - My_Connections[Idx].zip.out.total_in = 0; - My_Connections[Idx].zip.out.total_in = 0; - My_Connections[Idx].zip.out.zalloc = NULL; - My_Connections[Idx].zip.out.zfree = NULL; - My_Connections[Idx].zip.out.data_type = Z_ASCII; - - if( deflateInit( &My_Connections[Idx].zip.out, Z_DEFAULT_COMPRESSION ) != Z_OK ) - { - /* Fehler! */ - Log( LOG_ALERT, "Can't initialize compression on connection %d (zlib deflate)!", Idx ); - return FALSE; - } - - My_Connections[Idx].zip.bytes_in = My_Connections[Idx].bytes_in; - My_Connections[Idx].zip.bytes_out = My_Connections[Idx].bytes_out; - - Log( LOG_INFO, "Enabled link compression (zlib) on connection %d.", Idx ); - Conn_SetOption( Idx, CONN_ZIP ); - - return TRUE; -} /* Conn_InitZip */ - -#endif - - -LOCAL BOOLEAN -Try_Write( CONN_ID Idx ) -{ - /* Versuchen, Daten aus dem Schreib-Puffer in den Socket zu - * schreiben. TRUE wird geliefert, wenn entweder keine Daten - * zum Versenden vorhanden sind oder erfolgreich bearbeitet - * werden konnten. Im Fehlerfall wird FALSE geliefert und - * die Verbindung geschlossen. */ - - fd_set write_socket; - struct timeval tv; - assert( Idx > NONE ); - assert( My_Connections[Idx].sock > NONE ); + /* Mark socket as invalid: */ + My_Connections[Idx].sock = NONE; - /* sind ueberhaupt Daten vorhanden? */ -#ifdef USE_ZLIB - if(( ! My_Connections[Idx].wdatalen > 0 ) && ( ! My_Connections[Idx].zip.wdatalen )) return TRUE; -#else - if( ! My_Connections[Idx].wdatalen > 0 ) return TRUE; + /* If there is still a client, unregister it now */ + if( c ) Client_Destroy( c, LogMsg, FwdMsg, true ); + + /* Calculate statistics and log information */ + in_k = (double)My_Connections[Idx].bytes_in / 1024; + out_k = (double)My_Connections[Idx].bytes_out / 1024; +#ifdef ZLIB + if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) { + in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024; + out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024; + in_p = (int)(( in_k * 100 ) / in_z_k ); + out_p = (int)(( out_k * 100 ) / out_z_k ); + Log( LOG_INFO, "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).", Idx, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, in_z_k, in_p, out_k, out_z_k, out_p ); + } + else #endif + { + Log( LOG_INFO, "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).", Idx, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, out_k ); + } - /* Timeout initialisieren: 0 Sekunden, also nicht blockieren */ - tv.tv_sec = 0; tv.tv_usec = 0; + /* Is there a resolver sub-process running? */ + if( My_Connections[Idx].res_stat ) + FreeRes_stat( &My_Connections[Idx] ); - FD_ZERO( &write_socket ); - FD_SET( My_Connections[Idx].sock, &write_socket ); - if( select( My_Connections[Idx].sock + 1, NULL, &write_socket, NULL, &tv ) == -1 ) - { - /* Fehler! */ - if( errno != EINTR ) - { - Log( LOG_ALERT, "Try_Write(): select() failed: %s (con=%d, sock=%d)!", strerror( errno ), Idx, My_Connections[Idx].sock ); - Conn_Close( Idx, "Server error!", NULL, FALSE ); - return FALSE; - } + /* Servers: Modify time of next connect attempt? */ + Conf_UnsetServer( Idx ); + +#ifdef ZLIB + /* Clean up zlib, if link was compressed */ + if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) { + inflateEnd( &My_Connections[Idx].zip.in ); + deflateEnd( &My_Connections[Idx].zip.out ); + array_free(&My_Connections[Idx].zip.rbuf); + array_free(&My_Connections[Idx].zip.wbuf); } +#endif - if( FD_ISSET( My_Connections[Idx].sock, &write_socket )) return Handle_Write( Idx ); - else return TRUE; -} /* Try_Write */ + array_free(&My_Connections[Idx].rbuf); + array_free(&My_Connections[Idx].wbuf); + /* Clean up connection structure (=free it) */ + Init_Conn_Struct( Idx ); +#ifdef DEBUG + Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx ); +#endif +} /* Conn_Close */ -LOCAL VOID -Handle_Read( INT Sock ) -{ - /* Aktivitaet auf einem Socket verarbeiten: - * - neue Clients annehmen, - * - Daten von Clients verarbeiten, - * - Resolver-Rueckmeldungen annehmen. */ - CONN_ID idx; +GLOBAL void +Conn_SyncServerStruct( void ) +{ + /* Synchronize server structures (connection IDs): + * connections <-> configuration */ - assert( Sock > NONE ); + CLIENT *client; + CONN_ID i; + int c; - if( FD_ISSET( Sock, &My_Listeners )) + for( i = 0; i < Pool_Size; i++ ) { - /* es ist einer unserer Listener-Sockets: es soll - * also eine neue Verbindung aufgebaut werden. */ + /* Established connection? */ + if( My_Connections[i].sock <= NONE ) continue; - New_Connection( Sock ); - } - else if( FD_ISSET( Sock, &Resolver_FDs )) - { - /* Rueckmeldung von einem Resolver Sub-Prozess */ + /* Server connection? */ + client = Client_GetFromConn( i ); + if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue; - Read_Resolver_Result( Sock ); - } - else - { - /* Ein Client Socket: entweder ein User oder Server */ + for( c = 0; c < MAX_SERVERS; c++ ) + { + /* Configured server? */ + if( ! Conf_Server[c].host[0] ) continue; - idx = Socket2Index( Sock ); - if( idx > NONE ) Read_Request( idx ); + /* Duplicate? */ + if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i; + } } -} /* Handle_Read */ +} /* SyncServerStruct */ -LOCAL BOOLEAN +static bool Handle_Write( CONN_ID Idx ) { /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */ - INT len, res, err; + int len; + unsigned int wdatalen; + Log(LOG_DEBUG, "Handle_Write"); assert( Idx > NONE ); + if ( My_Connections[Idx].sock < 0 ) { + Log(LOG_WARNING, "Handle_Write() on closed socket, idx %d", Idx); + return false; + } assert( My_Connections[Idx].sock > NONE ); - if( FD_ISSET( My_Connections[Idx].sock, &My_Connects )) - { - /* es soll nichts geschrieben werden, sondern ein - * connect() hat ein Ergebnis geliefert */ - - FD_CLR( My_Connections[Idx].sock, &My_Connects ); - - /* Ergebnis des connect() ermitteln */ - len = sizeof( err ); - res = getsockopt( My_Connections[Idx].sock, SOL_SOCKET, SO_ERROR, &err, &len ); - assert( len == sizeof( err )); - - /* Fehler aufgetreten? */ - if(( res != 0 ) || ( err != 0 )) - { - /* Fehler! */ - if( res != 0 ) Log( LOG_CRIT, "getsockopt (connection %d): %s!", Idx, strerror( errno )); - else Log( LOG_CRIT, "Can't connect socket to \"%s:%d\" (connection %d): %s!", My_Connections[Idx].host, Conf_Server[My_Connections[Idx].our_server].port, Idx, strerror( err )); - - /* Socket etc. pp. aufraeumen */ - FD_CLR( My_Connections[Idx].sock, &My_Sockets ); - close( My_Connections[Idx].sock ); - Init_Conn_Struct( Idx ); - - /* Bei Server-Verbindungen lasttry-Zeitpunkt auf "jetzt" setzen */ - Conf_Server[My_Connections[Idx].our_server].lasttry = time( NULL ); - - return FALSE; - } - Log( LOG_DEBUG, "Connection %d with \"%s:%d\" established, now sendig PASS and SERVER ...", Idx, My_Connections[Idx].host, Conf_Server[My_Connections[Idx].our_server].port ); - - /* PASS und SERVER verschicken */ - Conn_WriteStr( Idx, "PASS %s %s", Conf_Server[My_Connections[Idx].our_server].pwd_out, NGIRCd_ProtoID ); - return Conn_WriteStr( Idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo ); + wdatalen = array_bytes(&My_Connections[Idx].wbuf ); +#ifdef ZLIB + if(( wdatalen == 0 ) && ( ! array_bytes(&My_Connections[Idx].zip.wbuf))) { + io_event_del(My_Connections[Idx].sock, IO_WANTWRITE ); + return true; } -#ifdef USE_ZLIB - /* Schreibpuffer leer, aber noch Daten im Kompressionsbuffer? - * Dann muss dieser nun geflushed werden! */ - if( My_Connections[Idx].wdatalen == 0 ) Zip_Flush( Idx ); + /* write buffer empty, but not compression buf? -> flush compression buf. */ + if( wdatalen == 0 ) Zip_Flush( Idx ); +#else + if( wdatalen == 0 ) { + io_event_del(My_Connections[Idx].sock, IO_WANTWRITE ); + return true; + } #endif - assert( My_Connections[Idx].wdatalen > 0 ); - - /* Daten schreiben */ - len = send( My_Connections[Idx].sock, My_Connections[Idx].wbuf, My_Connections[Idx].wdatalen, 0 ); - if( len < 0 ) - { - /* Operation haette Socket "nur" blockiert ... */ - if( errno == EAGAIN ) return TRUE; + wdatalen = array_bytes(&My_Connections[Idx].wbuf ); /* Zip_Flush may change wbuf */ + len = write( My_Connections[Idx].sock, array_start(&My_Connections[Idx].wbuf), wdatalen ); + if( len < 0 ) { + if( errno == EAGAIN || errno == EINTR) + return true; - /* Oops, ein Fehler! */ - Log( LOG_ERR, "Write error on connection %d (socket %d): %s!", Idx, My_Connections[Idx].sock, strerror( errno )); - Conn_Close( Idx, "Write error!", NULL, FALSE ); - return FALSE; + Log( LOG_ERR, "Write error on connection %d (socket %d): %s!", Idx, + My_Connections[Idx].sock, strerror( errno )); + Conn_Close( Idx, "Write error!", NULL, false ); + return false; } - /* Puffer anpassen */ - My_Connections[Idx].wdatalen -= len; - memmove( My_Connections[Idx].wbuf, My_Connections[Idx].wbuf + len, My_Connections[Idx].wdatalen ); + /* move any data not yet written to beginning */ + array_moveleft(&My_Connections[Idx].wbuf, 1, len); - return TRUE; + return true; } /* Handle_Write */ -LOCAL VOID -New_Connection( INT Sock ) +static int +New_Connection( int Sock ) { /* Neue Client-Verbindung von Listen-Socket annehmen und * CLIENT-Struktur anlegen. */ +#ifdef TCPWRAP + struct request_info req; +#endif struct sockaddr_in new_addr; - INT new_sock, new_sock_len; + int new_sock, new_sock_len; RES_STAT *s; CONN_ID idx; CLIENT *c; POINTER *ptr; - LONG new_size; + long new_size, cnt; assert( Sock > NONE ); - /* Connection auf Listen-Socket annehmen */ new_sock_len = sizeof( new_addr ); new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len ); if( new_sock < 0 ) { Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno )); - return; + return -1; + } + +#ifdef TCPWRAP + /* Validate socket using TCP Wrappers */ + request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL ); + fromhost(&req); + if( ! hosts_access( &req )) + { + /* Access denied! */ + Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr )); + Simple_Message( new_sock, "ERROR :Connection refused" ); + close( new_sock ); + return -1; } +#endif /* Socket initialisieren */ Init_Socket( new_sock ); + + /* Check IP-based connection limit */ + cnt = Count_Connections( new_addr ); + if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP )) + { + /* Access denied, too many connections from this IP address! */ + Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt); + Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" ); + close( new_sock ); + return -1; + } /* Freie Connection-Struktur suchen */ for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break; if( idx >= Pool_Size ) { new_size = Pool_Size + CONNECTION_POOL; - + /* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden. * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */ - + if( Conf_MaxConnections > 0 ) { /* Es ist ein Limit konfiguriert */ @@ -1064,46 +969,50 @@ New_Connection( INT Sock ) { /* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */ Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size ); + Simple_Message( new_sock, "ERROR :Connection limit reached" ); close( new_sock ); - return; + return -1; } if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections; } - - /* zunaechst realloc() versuchen; wenn das scheitert, malloc() versuchen - * und Daten ggf. "haendisch" umkopieren. (Haesslich! Eine wirklich - * dynamische Verwaltung waere wohl _deutlich_ besser ...) */ - ptr = realloc( My_Connections, sizeof( CONNECTION ) * new_size ); - if( ! ptr ) + if( new_size < Pool_Size ) { - /* realloc() ist fehlgeschlagen. Nun malloc() probieren: */ - ptr = malloc( sizeof( CONNECTION ) * new_size ); - if( ! ptr ) - { - /* Offenbar steht kein weiterer Sepeicher zur Verfuegung :-( */ - Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" ); - close( new_sock ); - return; - } - - /* Struktur umkopieren ... */ - memcpy( ptr, My_Connections, sizeof( CONNECTION ) * Pool_Size ); - - Log( LOG_DEBUG, "Allocated new connection pool for %ld items. [malloc()/memcpy()]", new_size ); + Log( LOG_ALERT, "Can't accept connection: limit (%d) reached -- overflow!", Pool_Size ); + Simple_Message( new_sock, "ERROR :Connection limit reached" ); + close( new_sock ); + return -1; } - else Log( LOG_DEBUG, "Allocated new connection pool for %ld items. [realloc()]", new_size ); - - My_Connections = ptr; + + ptr = (POINTER *)realloc( My_Connections, sizeof( CONNECTION ) * new_size ); + if( ! ptr ) { + Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" ); + Simple_Message( new_sock, "ERROR: Internal error" ); + close( new_sock ); + return -1; + } + +#ifdef DEBUG + Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size ); +#endif + + /* Adjust pointer to new block */ + My_Connections = (CONNECTION *)ptr; + + /* Initialize new items */ + for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx ); + idx = Pool_Size; + + /* Adjust new pool size */ Pool_Size = new_size; } /* Client-Struktur initialisieren */ - c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, FALSE ); - if( ! c ) - { + c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false ); + if( ! c ) { Log( LOG_ALERT, "Can't accept connection: can't create client structure!" ); + Simple_Message( new_sock, "ERROR :Internal error" ); close( new_sock ); - return; + return -1; } /* Verbindung registrieren */ @@ -1112,31 +1021,33 @@ New_Connection( INT Sock ) My_Connections[idx].addr = new_addr; /* Neuen Socket registrieren */ - FD_SET( new_sock, &My_Sockets ); - if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock; + if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) { + Simple_Message( new_sock, "ERROR :Internal error" ); + Conn_Close( idx, "io_event_create() failed", NULL, false ); + return -1; + } Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", idx, inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock ); /* Hostnamen ermitteln */ - strcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr )); + strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host )); Client_SetHostname( c, My_Connections[idx].host ); +#ifdef IDENTAUTH + s = Resolve_Addr( &new_addr, My_Connections[idx].sock ); +#else s = Resolve_Addr( &new_addr ); - if( s ) - { - /* Sub-Prozess wurde asyncron gestartet */ -#ifndef STRICT_RFC - Conn_WriteStr( idx, "NOTICE AUTH :%sLooking up your hostname ...", NOTICE_TXTPREFIX ); #endif - My_Connections[idx].res_stat = s; - } - + /* resolver process has been started */ + if( s ) My_Connections[idx].res_stat = s; + /* Penalty-Zeit setzen */ Conn_SetPenalty( idx, 4 ); + return new_sock; } /* New_Connection */ -LOCAL CONN_ID -Socket2Index( INT Sock ) +static CONN_ID +Socket2Index( int Sock ) { /* zum Socket passende Connection suchen */ @@ -1150,78 +1061,73 @@ Socket2Index( INT Sock ) { /* die Connection wurde vermutlich (wegen eines * Fehlers) bereits wieder abgebaut ... */ +#ifdef DEBUG Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock ); +#endif return NONE; } else return idx; } /* Socket2Index */ -LOCAL VOID +static void Read_Request( CONN_ID Idx ) { /* Daten von Socket einlesen und entsprechend behandeln. * Tritt ein Fehler auf, so wird der Socket geschlossen. */ - INT len, bsize; -#ifdef USE_ZLIB - CLIENT *c; -#endif + int len; + char readbuf[1024]; assert( Idx > NONE ); assert( My_Connections[Idx].sock > NONE ); - /* wenn noch nicht registriert: maximal mit ZREADBUFFER_LEN arbeiten, - * ansonsten koennen Daten ggf. nicht umkopiert werden. */ - bsize = READBUFFER_LEN; -#ifdef USE_ZLIB - c = Client_GetFromConn( Idx ); - if(( Client_Type( c ) != CLIENT_USER ) && ( Client_Type( c ) != CLIENT_SERVER ) && ( Client_Type( c ) != CLIENT_SERVICE ) && ( bsize > ZREADBUFFER_LEN )) bsize = ZREADBUFFER_LEN; -#endif - -#ifdef USE_ZLIB - if(( bsize - My_Connections[Idx].rdatalen - 1 < 1 ) || ( ZREADBUFFER_LEN - My_Connections[Idx].zip.rdatalen < 1 )) +#ifdef ZLIB + if (( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) || + ( array_bytes(&My_Connections[Idx].zip.rbuf) >= ZREADBUFFER_LEN )) #else - if( bsize - My_Connections[Idx].rdatalen - 1 < 1 ) + if ( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) #endif { /* Der Lesepuffer ist voll */ - Log( LOG_ERR, "Read buffer overflow (connection %d): %d bytes!", Idx, My_Connections[Idx].rdatalen ); - Conn_Close( Idx, "Read buffer overflow!", NULL, FALSE ); + Log( LOG_ERR, "Receive buffer overflow (connection %d): %d bytes!", Idx, + array_bytes(&My_Connections[Idx].rbuf)); + Conn_Close( Idx, "Receive buffer overflow!", NULL, false ); return; } -#ifdef USE_ZLIB - if( My_Connections[Idx].options & CONN_ZIP ) - { - len = recv( My_Connections[Idx].sock, My_Connections[Idx].zip.rbuf + My_Connections[Idx].zip.rdatalen, ( ZREADBUFFER_LEN - My_Connections[Idx].zip.rdatalen ), 0 ); - if( len > 0 ) My_Connections[Idx].zip.rdatalen += len; - } - else -#endif - { - len = recv( My_Connections[Idx].sock, My_Connections[Idx].rbuf + My_Connections[Idx].rdatalen, bsize - My_Connections[Idx].rdatalen - 1, 0 ); - if( len > 0 ) My_Connections[Idx].rdatalen += len; - } - - if( len == 0 ) - { - /* Socket wurde geschlossen */ - Log( LOG_INFO, "%s:%d is closing the connection ...", inet_ntoa( My_Connections[Idx].addr.sin_addr ), ntohs( My_Connections[Idx].addr.sin_port)); - Conn_Close( Idx, "Socket closed!", "Client closed connection", FALSE ); + len = read( My_Connections[Idx].sock, readbuf, sizeof readbuf -1 ); + if( len == 0 ) { + Log( LOG_INFO, "%s:%d (%s) is closing the connection ...", + My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port), + inet_ntoa( My_Connections[Idx].addr.sin_addr )); + Conn_Close( Idx, "Socket closed!", "Client closed connection", false ); return; } - if( len < 0 ) - { - /* Operation haette Socket "nur" blockiert ... */ + if( len < 0 ) { if( errno == EAGAIN ) return; - - /* Fehler beim Lesen */ - Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx, My_Connections[Idx].sock, strerror( errno )); - Conn_Close( Idx, "Read error!", "Client closed connection", FALSE ); + Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx, + My_Connections[Idx].sock, strerror( errno )); + Conn_Close( Idx, "Read error!", "Client closed connection", false ); return; } +#ifdef ZLIB + if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) { + if (!array_catb( &My_Connections[Idx].zip.rbuf, readbuf, len)) { + Log( LOG_ERR, "Could not append recieved data to zip input buffer (connn %d): %d bytes!", Idx, len ); + Conn_Close( Idx, "Receive buffer overflow!", NULL, false ); + return; + } + } else +#endif + { + readbuf[len] = 0; + if (!array_cats( &My_Connections[Idx].rbuf, readbuf )) { + Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len ); + Conn_Close( Idx, "Receive buffer overflow!", NULL, false ); + } + } /* Connection-Statistik aktualisieren */ My_Connections[Idx].bytes_in += len; @@ -1233,262 +1139,253 @@ Read_Request( CONN_ID Idx ) } /* Read_Request */ -LOCAL BOOLEAN +static bool Handle_Buffer( CONN_ID Idx ) { - /* Daten im Lese-Puffer einer Verbindung verarbeiten. - * Wurde ein Request verarbeitet, so wird TRUE geliefert, - * ansonsten FALSE (auch bei Fehlern). */ - + /* Handle Data in Connections Read-Buffer. + * Return true if a reuqest was handled, false otherwise (also returned on errors). */ #ifndef STRICT_RFC - CHAR *ptr1, *ptr2; + char *ptr1, *ptr2; #endif - CHAR *ptr; - INT len, delta; - BOOLEAN action, result; -#ifdef USE_ZLIB - BOOLEAN old_z; + char *ptr; + int len, delta; + bool action, result; +#ifdef ZLIB + bool old_z; #endif - result = FALSE; - do - { -#ifdef USE_ZLIB - /* ggf. noch unkomprimiete Daten weiter entpacken */ - if( My_Connections[Idx].options & CONN_ZIP ) - { - if( ! Unzip_Buffer( Idx )) return FALSE; - } + result = false; + do { + /* Check penalty */ + if( My_Connections[Idx].delaytime > time( NULL )) return result; +#ifdef ZLIB + /* unpack compressed data */ + if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) + if( ! Unzip_Buffer( Idx )) return false; #endif - - if( My_Connections[Idx].rdatalen < 1 ) break; - /* Eine komplette Anfrage muss mit CR+LF enden, vgl. - * RFC 2812. Haben wir eine? */ - My_Connections[Idx].rbuf[My_Connections[Idx].rdatalen] = '\0'; - ptr = strstr( My_Connections[Idx].rbuf, "\r\n" ); - - if( ptr ) delta = 2; + if (0 == array_bytes(&My_Connections[Idx].rbuf)) + break; + + if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */ + return false; + + /* A Complete Request end with CR+LF, see RFC 2812. */ + ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" ); + + if( ptr ) delta = 2; /* complete request */ #ifndef STRICT_RFC - else - { - /* Nicht RFC-konforme Anfrage mit nur CR oder LF? Leider - * machen soetwas viele Clients, u.a. "mIRC" :-( */ - ptr1 = strchr( My_Connections[Idx].rbuf, '\r' ); - ptr2 = strchr( My_Connections[Idx].rbuf, '\n' ); + else { + /* Check for non-RFC-compliant request (only CR or LF)? Unfortunately, + * there are quite a few clients that do this (incl. "mIRC" :-( */ + ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' ); + ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' ); delta = 1; if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1; else if( ptr1 ) ptr = ptr1; else if( ptr2 ) ptr = ptr2; } #endif - - action = FALSE; - if( ptr ) - { - /* Ende der Anfrage wurde gefunden */ - *ptr = '\0'; - len = ( ptr - My_Connections[Idx].rbuf ) + delta; - if( len > ( COMMAND_LEN - 1 )) - { - /* Eine Anfrage darf(!) nicht laenger als 512 Zeichen - * (incl. CR+LF!) werden; vgl. RFC 2812. Wenn soetwas - * empfangen wird, wird der Client disconnectiert. */ - Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!", Idx, My_Connections[Idx].rdatalen, COMMAND_LEN - 1 ); - Conn_Close( Idx, NULL, "Request too long", TRUE ); - return FALSE; - } -#ifdef USE_ZLIB - /* merken, ob Stream bereits komprimiert wird */ - old_z = My_Connections[Idx].options & CONN_ZIP; -#endif + action = false; + if( ! ptr ) + break; - if( len > delta ) - { - /* Es wurde ein Request gelesen */ - if( ! Parse_Request( Idx, My_Connections[Idx].rbuf )) return FALSE; - else action = TRUE; - } + /* End of request found */ + *ptr = '\0'; - /* Puffer anpassen */ - My_Connections[Idx].rdatalen -= len; - memmove( My_Connections[Idx].rbuf, My_Connections[Idx].rbuf + len, My_Connections[Idx].rdatalen ); + len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta; -#ifdef USE_ZLIB - if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) && ( My_Connections[Idx].rdatalen > 0 )) - { - /* Mit dem letzten Befehl wurde Socket-Kompression aktiviert. - * Evtl. schon vom Socket gelesene Daten in den Unzip-Puffer - * umkopieren, damit diese nun zunaechst entkomprimiert werden */ - { - if( My_Connections[Idx].rdatalen > ZREADBUFFER_LEN ) - { - /* Hupsa! Soviel Platz haben wir aber gar nicht! */ - Log( LOG_ALERT, "Can't move read buffer: No space left in unzip buffer (need %d bytes)!", My_Connections[Idx].rdatalen ); - return FALSE; - } - memcpy( My_Connections[Idx].zip.rbuf, My_Connections[Idx].rbuf, My_Connections[Idx].rdatalen ); - My_Connections[Idx].zip.rdatalen = My_Connections[Idx].rdatalen; - My_Connections[Idx].rdatalen = 0; - Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", My_Connections[Idx].zip.rdatalen ); - } - } + if( len < 0 || len > ( COMMAND_LEN - 1 )) { + /* Request must not exceed 512 chars (incl. CR+LF!), see + * RFC 2812. Disconnect Client if this happens. */ + Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!", + Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 ); + Conn_Close( Idx, NULL, "Request too long", true ); + return false; + } + +#ifdef ZLIB + /* remember if stream is already compressed */ + old_z = My_Connections[Idx].options & CONN_ZIP; +#endif + + if( len > delta ) + { + /* A Request was read */ + My_Connections[Idx].msg_in++; + if( ! Parse_Request( Idx, (char*)array_start(&My_Connections[Idx].rbuf) )) return false; + else action = true; + + array_moveleft(&My_Connections[Idx].rbuf, 1, len); +#ifdef DEBUG + Log(LOG_DEBUG, "%d byte left in rbuf", array_bytes(&My_Connections[Idx].rbuf)); #endif } - - if( action ) result = TRUE; + +#ifdef ZLIB + if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) && ( array_bytes(&My_Connections[Idx].rbuf) > 0 )) + { + /* The last Command activated Socket-Compression. + * Data that was read after that needs to be copied to Unzip-buf + * for decompression */ + if( array_bytes(&My_Connections[Idx].rbuf)> ZREADBUFFER_LEN ) { + /* No space left */ + Log( LOG_ALERT, "Can't move receive buffer: No space left in unzip buffer (need %d bytes)!", array_bytes(&My_Connections[Idx].rbuf )); + return false; + } + if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf )) + return false; + + array_trunc(&My_Connections[Idx].rbuf); +#ifdef DEBUG + Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", array_bytes(&My_Connections[Idx].zip.rbuf)); +#endif /* DEBUG */ + } +#endif /* ZLIB */ + if( action ) result = true; } while( action ); - + return result; } /* Handle_Buffer */ -LOCAL VOID -Check_Connections( VOID ) +static void +Check_Connections( void ) { - /* Pruefen, ob Verbindungen noch "alive" sind. Ist dies - * nicht der Fall, zunaechst PING-PONG spielen und, wenn - * auch das nicht "hilft", Client disconnectieren. */ - + /* check if connections are alive. if not, play PING-PONG first. + * if this doesn't help either, disconnect client. */ CLIENT *c; - LONG i; + CONN_ID i; - for( i = 0; i < Pool_Size; i++ ) - { + for( i = 0; i < Pool_Size; i++ ) { if( My_Connections[i].sock == NONE ) continue; c = Client_GetFromConn( i ); if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE ))) { - /* verbundener User, Server oder Service */ - if( My_Connections[i].lastping > My_Connections[i].lastdata ) - { - /* es wurde bereits ein PING gesendet */ - if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) - { + /* connected User, Server or Service */ + if( My_Connections[i].lastping > My_Connections[i].lastdata ) { + /* we already sent a ping */ + if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) { /* Timeout */ +#ifdef DEBUG Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout ); - Conn_Close( i, NULL, "Ping timeout", TRUE ); +#endif + Conn_Close( i, NULL, "Ping timeout", true ); } } - else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) - { - /* es muss ein PING gesendet werden */ + else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) { + /* we need to sent a PING */ +#ifdef DEBUG Log( LOG_DEBUG, "Connection %d: sending PING ...", i ); +#endif My_Connections[i].lastping = time( NULL ); Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( ))); } } else { - /* noch nicht vollstaendig aufgebaute Verbindung */ + /* connection is not fully established yet */ if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) { /* Timeout */ +#ifdef DEBUG Log( LOG_DEBUG, "Connection %d timed out ...", i ); - Conn_Close( i, NULL, "Timeout", FALSE ); +#endif + Conn_Close( i, NULL, "Timeout", false ); } } } } /* Check_Connections */ -LOCAL VOID -Check_Servers( VOID ) +static void +Check_Servers( void ) { - /* Pruefen, ob Server-Verbindungen aufgebaut werden - * muessen bzw. koennen */ + /* Check if we can establish further server links */ RES_STAT *s; - LONG idx, n; - INT i; - - /* Wenn "Passive-Mode" aktiv: nicht verbinden */ - if( NGIRCd_Passive ) return; + CONN_ID idx; + int i, n; - for( i = 0; i < Conf_Server_Count; i++ ) + /* Serach all connections, are there results from the resolver? */ + for( idx = 0; idx < Pool_Size; idx++ ) { - /* Ist ein Hostname und Port definiert? */ - if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 )) continue; + if( My_Connections[idx].sock != SERVER_WAIT ) continue; - /* Haben wir schon eine Verbindung? */ - for( n = 0; n < Pool_Size; n++ ) - { - if( My_Connections[n].sock == NONE ) continue; - - /* Verbindung zu diesem Server? */ - if( My_Connections[n].our_server == i ) - { - /* Komplett aufgebaute Verbindung? */ - if( My_Connections[n].sock > NONE ) break; + /* IP resolved? */ + if( My_Connections[idx].res_stat == NULL ) New_Server( Conf_GetServer( idx ), idx ); + } - /* IP schon aufgeloest? */ - if( My_Connections[n].res_stat == NULL ) New_Server( i, n ); - } + /* Check all configured servers */ + for( i = 0; i < MAX_SERVERS; i++ ) + { + /* Valid outgoing server which isn't already connected or disabled? */ + if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) || ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED )) continue; - /* Verbindung in dieser Server-Gruppe? */ - if(( My_Connections[n].our_server != NONE ) && ( Conf_Server[i].group != NONE )) + /* Is there already a connection in this group? */ + if( Conf_Server[i].group > NONE ) + { + for( n = 0; n < MAX_SERVERS; n++ ) { - if( Conf_Server[My_Connections[n].our_server].group == Conf_Server[i].group ) break; + if( n == i ) continue; + if(( Conf_Server[n].conn_id > NONE ) && ( Conf_Server[n].group == Conf_Server[i].group )) break; } + if( n < MAX_SERVERS ) continue; } - if( n < Pool_Size ) continue; - /* Wann war der letzte Connect-Versuch? */ + /* Check last connect attempt? */ if( Conf_Server[i].lasttry > time( NULL ) - Conf_ConnectRetry ) continue; - /* Okay, Verbindungsaufbau versuchen */ + /* Okay, try to connect now */ Conf_Server[i].lasttry = time( NULL ); - /* Freie Connection-Struktur suschen */ + /* Search free connection structure */ for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break; if( idx >= Pool_Size ) { Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!", Pool_Size ); return; } +#ifdef DEBUG Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host ); +#endif /* Verbindungs-Struktur initialisieren */ Init_Conn_Struct( idx ); My_Connections[idx].sock = SERVER_WAIT; - My_Connections[idx].our_server = i; + Conf_Server[i].conn_id = idx; - /* Hostnamen in IP aufloesen (Default bzw. im Fehlerfall: versuchen, den - * konfigurierten Text direkt als IP-Adresse zu verwenden ... */ - strcpy( Conf_Server[My_Connections[idx].our_server].ip, Conf_Server[i].host ); - strcpy( My_Connections[idx].host, Conf_Server[i].host ); + /* Resolve Hostname. If this fails, try to use it as an IP address */ + strlcpy( Conf_Server[i].ip, Conf_Server[i].host, sizeof( Conf_Server[i].ip )); + strlcpy( My_Connections[idx].host, Conf_Server[i].host, sizeof( My_Connections[idx].host )); s = Resolve_Name( Conf_Server[i].host ); - if( s ) - { - /* Sub-Prozess wurde asyncron gestartet */ - My_Connections[idx].res_stat = s; - } + + /* resolver process running? */ + if( s ) My_Connections[idx].res_stat = s; } } /* Check_Servers */ -LOCAL VOID -New_Server( INT Server, CONN_ID Idx ) +static void +New_Server( int Server, CONN_ID Idx ) { - /* Neue Server-Verbindung aufbauen */ + /* Establish new server link */ struct sockaddr_in new_addr; struct in_addr inaddr; - INT res, new_sock; + int res, new_sock; CLIENT *c; assert( Server > NONE ); assert( Idx > NONE ); - /* Wurde eine gueltige IP-Adresse gefunden? */ - if( ! Conf_Server[Server].ip[0] ) - { - /* Nein. Verbindung wieder freigeben: */ - Init_Conn_Struct( Idx ); + /* Did we get a valid IP address? */ + if( ! Conf_Server[Server].ip[0] ) { + /* No. Free connection structure and abort: */ Log( LOG_ERR, "Can't connect to \"%s\" (connection %d): ip address unknown!", Conf_Server[Server].host, Idx ); - return; + goto out; } Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d (connection %d) ... ", Conf_Server[Server].host, Conf_Server[Server].ip, Conf_Server[Server].port, Idx ); @@ -1501,10 +1398,9 @@ New_Server( INT Server, CONN_ID Idx ) if( inaddr.s_addr == (unsigned)-1 ) #endif { - /* Konnte Adresse nicht konvertieren */ - Init_Conn_Struct( Idx ); + /* Can't convert IP address */ Log( LOG_ERR, "Can't connect to \"%s\" (connection %d): can't convert ip address %s!", Conf_Server[Server].host, Idx, Conf_Server[Server].ip ); - return; + goto out; } memset( &new_addr, 0, sizeof( new_addr )); @@ -1513,286 +1409,279 @@ New_Server( INT Server, CONN_ID Idx ) new_addr.sin_port = htons( Conf_Server[Server].port ); new_sock = socket( PF_INET, SOCK_STREAM, 0 ); - if ( new_sock < 0 ) - { - Init_Conn_Struct( Idx ); + if ( new_sock < 0 ) { + /* Can't create socket */ Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno )); - return; + goto out; } if( ! Init_Socket( new_sock )) return; res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr )); - if(( res != 0 ) && ( errno != EINPROGRESS )) - { + if(( res != 0 ) && ( errno != EINPROGRESS )) { + /* Can't connect socket */ Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno )); close( new_sock ); - Init_Conn_Struct( Idx ); - return; + goto out; } /* Client-Struktur initialisieren */ - c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, FALSE ); - if( ! c ) - { - close( new_sock ); - Init_Conn_Struct( Idx ); + c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false ); + if( ! c ) { + /* Can't create new client structure */ Log( LOG_ALERT, "Can't establish connection: can't create client structure!" ); - return; + close( new_sock ); + goto out; } + Client_SetIntroducer( c, c ); Client_SetToken( c, TOKEN_OUTBOUND ); - /* Verbindung registrieren */ + /* Register connection */ My_Connections[Idx].sock = new_sock; My_Connections[Idx].addr = new_addr; - strcpy( My_Connections[Idx].host, Conf_Server[Server].host ); + strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host )); - /* Neuen Socket registrieren */ - FD_SET( new_sock, &My_Sockets ); - FD_SET( new_sock, &My_Connects ); - if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock; - + /* Register new socket */ + if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) { + Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno)); + Conn_Close( Idx, "io_event_create() failed", NULL, false ); + goto out; + } + +#ifdef DEBUG Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock ); +#endif + Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCONNECTING ); + return; +out: + Init_Conn_Struct( Idx ); + Conf_Server[Server].conn_id = NONE; } /* New_Server */ -LOCAL VOID -Init_Conn_Struct( LONG Idx ) +static void +Init_Conn_Struct( CONN_ID Idx ) { + time_t now = time( NULL ); /* Connection-Struktur initialisieren */ + memset( &My_Connections[Idx], 0, sizeof ( CONNECTION )); My_Connections[Idx].sock = NONE; - My_Connections[Idx].res_stat = NULL; - My_Connections[Idx].host[0] = '\0'; - My_Connections[Idx].rbuf[0] = '\0'; - My_Connections[Idx].rdatalen = 0; - My_Connections[Idx].wbuf[0] = '\0'; - My_Connections[Idx].wdatalen = 0; - My_Connections[Idx].our_server = NONE; - My_Connections[Idx].lastdata = time( NULL ); - My_Connections[Idx].lastping = 0; - My_Connections[Idx].lastprivmsg = time( NULL ); - My_Connections[Idx].delaytime = 0; - My_Connections[Idx].bytes_in = 0; - My_Connections[Idx].bytes_out = 0; - My_Connections[Idx].flag = 0; - My_Connections[Idx].options = 0; - -#ifdef USE_ZLIB - My_Connections[Idx].zip.rbuf[0] = '\0'; - My_Connections[Idx].zip.rdatalen = 0; - My_Connections[Idx].zip.wbuf[0] = '\0'; - My_Connections[Idx].zip.wdatalen = 0; - My_Connections[Idx].zip.bytes_in = 0; - My_Connections[Idx].zip.bytes_out = 0; -#endif + My_Connections[Idx].lastdata = now; + My_Connections[Idx].lastprivmsg = now; } /* Init_Conn_Struct */ -LOCAL BOOLEAN -Init_Socket( INT Sock ) +static bool +Init_Socket( int Sock ) { - /* Socket-Optionen setzen */ + /* Initialize socket (set options) */ - INT on = 1; + int value; -#ifdef O_NONBLOCK /* A/UX kennt das nicht? */ - if( fcntl( Sock, F_SETFL, O_NONBLOCK ) != 0 ) - { - Log( LOG_CRIT, "Can't enable non-blocking mode: %s!", strerror( errno )); + if (!io_setnonblock(Sock)) { + Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno )); close( Sock ); - return FALSE; + return false; + } + + /* Don't block this port after socket shutdown */ + value = 1; + if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 ) + { + Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno )); + /* ignore this error */ } + + /* Set type of service (TOS) */ +#if defined(IP_TOS) && defined(IPTOS_LOWDELAY) + value = IPTOS_LOWDELAY; +#ifdef DEBUG + Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value ); #endif - if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &on, (socklen_t)sizeof( on )) != 0) + if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 ) { - Log( LOG_ERR, "Can't set socket options: %s!", strerror( errno )); - /* dieser Fehler kann ignoriert werden. */ + Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno )); + /* ignore this error */ } +#endif - return TRUE; + return true; } /* Init_Socket */ -LOCAL VOID -Read_Resolver_Result( INT r_fd ) +GLOBAL +void Read_Resolver_Result( int r_fd ) { - /* Ergebnis von Resolver Sub-Prozess aus Pipe lesen - * und entsprechende Connection aktualisieren */ + /* Read result of resolver sub-process from pipe and update the + * apropriate connection/client structure(s): hostname and/or + * IDENT user name.*/ - CHAR result[HOST_LEN]; CLIENT *c; - INT len, i; - - FD_CLR( r_fd, &Resolver_FDs ); - - /* Anfrage vom Parent lesen */ - len = read( r_fd, result, HOST_LEN - 1 ); - if( len < 0 ) - { - /* Fehler beim Lesen aus der Pipe */ - close( r_fd ); - Log( LOG_CRIT, "Resolver: Can't read result: %s!", strerror( errno )); - return; - } - result[len] = '\0'; + int bytes_read, i, n; + unsigned int len; + RES_STAT *s; + char *ptr; + char *bufptr; + char readbuf[HOST_LEN]; - /* zugehoerige Connection suchen */ + Log( LOG_DEBUG, "Resolver: started, fd %d", r_fd ); + /* Search associated connection ... */ for( i = 0; i < Pool_Size; i++ ) { - if(( My_Connections[i].sock != NONE ) && ( My_Connections[i].res_stat ) && ( My_Connections[i].res_stat->pipe[0] == r_fd )) break; + if(( My_Connections[i].sock != NONE ) + && ( My_Connections[i].res_stat != NULL ) + && ( My_Connections[i].res_stat->pipe[0] == r_fd )) + break; } if( i >= Pool_Size ) { - /* Opsa! Keine passende Connection gefunden!? Vermutlich - * wurde sie schon wieder geschlossen. */ - close( r_fd ); + /* Ops, none found? Probably the connection has already + * been closed!? We'll ignore that ... */ + io_close( r_fd ); +#ifdef DEBUG Log( LOG_DEBUG, "Resolver: Got result for unknown connection!?" ); +#endif return; } - Log( LOG_DEBUG, "Resolver: %s is \"%s\".", My_Connections[i].host, result ); - - /* Aufraeumen */ - close( My_Connections[i].res_stat->pipe[0] ); - close( My_Connections[i].res_stat->pipe[1] ); - free( My_Connections[i].res_stat ); - My_Connections[i].res_stat = NULL; + /* Get resolver structure */ + s = My_Connections[i].res_stat; + assert( s != NULL ); + + /* Read result from pipe */ + bytes_read = read( r_fd, readbuf, sizeof readbuf -1 ); + if( bytes_read < 0 ) { + /* Error! */ + Log( LOG_CRIT, "Resolver: Can't read result: %s!", strerror( errno )); + FreeRes_stat( &My_Connections[i] ); + return; + } + len = (unsigned int) bytes_read; + readbuf[len] = '\0'; + if (!array_catb(&s->buffer, readbuf, len)) { + Log( LOG_CRIT, "Resolver: Can't append result %s to buffer: %s", readbuf, strerror( errno )); + FreeRes_stat(&My_Connections[i]); + return; + } + + if (!array_cat0_temporary(&s->buffer)) { + Log( LOG_CRIT, "Resolver: Can't append result %s to buffer: %s", readbuf, strerror( errno )); + FreeRes_stat(&My_Connections[i]); + return; + } + + /* If the result string is incomplete, return to main loop and + * wait until we can read in more bytes. */ +#ifdef IDENTAUTH +try_resolve: +#endif + bufptr = (char*) array_start(&s->buffer); + assert(bufptr != NULL); + ptr = strchr( bufptr, '\n' ); + if( ! ptr ) return; + *ptr = '\0'; + +#ifdef DEBUG + Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%u bytes read), stage %d.", bufptr, len, s->stage); +#endif + /* Okay, we got a complete result: this is a host name for outgoing + * connections and a host name or IDENT user name (if enabled) for + * incoming connections.*/ if( My_Connections[i].sock > NONE ) { - /* Eingehende Verbindung: Hostnamen setzen */ + /* Incoming connection. Search client ... */ c = Client_GetFromConn( i ); assert( c != NULL ); - strcpy( My_Connections[i].host, result ); - Client_SetHostname( c, result ); -#ifndef STRICT_RFC - Conn_WriteStr( i, "NOTICE AUTH :%sGot your hostname.", NOTICE_TXTPREFIX ); + /* Only update client information of unregistered clients */ + if( Client_Type( c ) == CLIENT_UNKNOWN ) + { + switch(s->stage) { + case 0: /* host name */ + strlcpy( My_Connections[i].host, bufptr, sizeof( My_Connections[i].host)); + + Client_SetHostname( c, bufptr); +#ifdef IDENTAUTH + /* clean up buffer for IDENT result */ + len = strlen(bufptr) + 1; + assert(len <= array_bytes(&s->buffer)); + array_moveleft(&s->buffer, 1, len); + + /* Don't close pipe and clean up, but + * instead wait for IDENT result */ + s->stage = 1; + goto try_resolve; + + case 1: /* IDENT user name */ + if (array_bytes(&s->buffer)) { + bufptr = (char*) array_start(&s->buffer); + Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, bufptr); + Client_SetUser( c, bufptr, true ); + } + else Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i ); +#endif + break; + default: + Log( LOG_ERR, "Resolver: got result for unknown stage %d!?", s->stage ); + } + } +#ifdef DEBUG + else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i ); #endif } else { - /* Ausgehende Verbindung (=Server): IP setzen */ - assert( My_Connections[i].our_server > NONE ); - strcpy( Conf_Server[My_Connections[i].our_server].ip, result ); - } - - /* Penalty-Zeit zurueck setzen */ - Conn_ResetPenalty( i ); -} /* Read_Resolver_Result */ - - -#ifdef USE_ZLIB + /* Outgoing connection (server link): set the IP address + * so that we can connect to it in the main loop. */ -LOCAL BOOLEAN -Zip_Buffer( CONN_ID Idx, CHAR *Data, INT Len ) -{ - /* Daten zum Komprimieren im "Kompressions-Puffer" sammeln. - * Es wird TRUE bei Erfolg, sonst FALSE geliefert. */ - - assert( Idx > NONE ); - assert( Data != NULL ); - assert( Len > 0 ); + /* Search server ... */ + n = Conf_GetServer( i ); + assert( n > NONE ); - /* Ist noch Platz im Kompressions-Puffer? */ - if( ZWRITEBUFFER_LEN - My_Connections[Idx].zip.wdatalen < Len + 50 ) - { - /* Nein! Puffer zunaechst leeren ...*/ - if( ! Zip_Flush( Idx )) return FALSE; + bufptr = (char*) array_start(&s->buffer); + strlcpy( Conf_Server[n].ip, bufptr, sizeof( Conf_Server[n].ip )); } - /* Daten kopieren */ - memmove( My_Connections[Idx].zip.wbuf + My_Connections[Idx].zip.wdatalen, Data, Len ); - My_Connections[Idx].zip.wdatalen += Len; + /* Clean up ... */ + FreeRes_stat( &My_Connections[i] ); - return TRUE; -} /* Zip_Buffer */ + /* Reset penalty time */ + Conn_ResetPenalty( i ); +} /* Read_Resolver_Result */ -LOCAL BOOLEAN -Zip_Flush( CONN_ID Idx ) +static void +Simple_Message( int Sock, char *Msg ) { - /* Daten komprimieren und in Schreibpuffer kopieren. - * Es wird TRUE bei Erfolg, sonst FALSE geliefert. */ - - INT result, out_len; - z_stream *out; - - out = &My_Connections[Idx].zip.out; - - out->next_in = My_Connections[Idx].zip.wbuf; - out->avail_in = My_Connections[Idx].zip.wdatalen; - out->next_out = My_Connections[Idx].wbuf + My_Connections[Idx].wdatalen; - out->avail_out = WRITEBUFFER_LEN - My_Connections[Idx].wdatalen; - - result = deflate( out, Z_SYNC_FLUSH ); - if(( result != Z_OK ) || ( out->avail_in > 0 )) - { - Log( LOG_ALERT, "Compression error: code %d!?", result ); - Conn_Close( Idx, "Compression error!", NULL, FALSE ); - return FALSE; - } + char buf[COMMAND_LEN]; + /* Write "simple" message to socket, without using compression + * or even the connection write buffers. Used e.g. for error + * messages by New_Connection(). */ + assert( Sock > NONE ); + assert( Msg != NULL ); - out_len = WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - out->avail_out; - My_Connections[Idx].wdatalen += out_len; - My_Connections[Idx].bytes_out += out_len; - My_Connections[Idx].zip.bytes_out += My_Connections[Idx].zip.wdatalen; - My_Connections[Idx].zip.wdatalen = 0; - - return TRUE; -} /* Zip_Flush */ + strlcpy( buf, Msg, sizeof buf - 2); + strlcat( buf, "\r\n", sizeof buf); + (void)write( Sock, buf, strlen( buf ) ); +} /* Simple_Error */ -LOCAL BOOLEAN -Unzip_Buffer( CONN_ID Idx ) +static int +Count_Connections( struct sockaddr_in addr_in ) { - /* Daten entpacken und in Lesepuffer kopieren. Bei Fehlern - * wird FALSE geliefert, ansonsten TRUE. Der Fall, dass keine - * Daten mehr zu entpacken sind, ist _kein_ Fehler! */ - - INT result, in_len, out_len; - z_stream *in; - - assert( Idx > NONE ); - - if( My_Connections[Idx].zip.rdatalen <= 0 ) return TRUE; - - in = &My_Connections[Idx].zip.in; - - in->next_in = My_Connections[Idx].zip.rbuf; - in->avail_in = My_Connections[Idx].zip.rdatalen; - in->next_out = My_Connections[Idx].rbuf + My_Connections[Idx].rdatalen; - in->avail_out = READBUFFER_LEN - My_Connections[Idx].rdatalen - 1; - - result = inflate( in, Z_SYNC_FLUSH ); - if( result != Z_OK ) - { - Log( LOG_ALERT, "Decompression error: code %d (ni=%d, ai=%d, no=%d, ao=%d)!?", result, in->next_in, in->avail_in, in->next_out, in->avail_out ); - Conn_Close( Idx, "Decompression error!", NULL, FALSE ); - return FALSE; - } - - in_len = My_Connections[Idx].zip.rdatalen - in->avail_in; - out_len = READBUFFER_LEN - My_Connections[Idx].rdatalen - 1 - in->avail_out; - My_Connections[Idx].rdatalen += out_len; - - if( in->avail_in > 0 ) + int i, cnt; + + cnt = 0; + for( i = 0; i < Pool_Size; i++ ) { - /* es konnten nicht alle Daten entpackt werden, vermutlich war - * im Ziel-Puffer kein Platz mehr. Umkopieren ... */ - My_Connections[Idx].zip.rdatalen -= in_len; - memmove( My_Connections[Idx].zip.rbuf, My_Connections[Idx].zip.rbuf + in_len, My_Connections[Idx].zip.rdatalen ); + if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++; } - else My_Connections[Idx].zip.rdatalen = 0; - My_Connections[Idx].zip.bytes_in += out_len; - - return TRUE; -} /* Unzip_Buffer */ + return cnt; +} /* Count_Connections */ -#endif - /* -eof- */