1670 lines
45 KiB
C
1670 lines
45 KiB
C
/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* Please read the file COPYING, README and AUTHORS for more information.
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*
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* Connection management
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*/
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#define CONN_MODULE
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#include "portab.h"
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static char UNUSED id[] = "$Id: conn.c,v 1.128 2003/12/26 15:55:07 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <time.h>
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#include <netinet/in.h>
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#else
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#define PF_INET AF_INET
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h> /* e.g. for Mac OS X */
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#endif
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#ifdef TCPWRAP
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#include <tcpd.h> /* for TCP Wrappers */
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#endif
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#include "defines.h"
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#include "resolve.h"
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#include "exp.h"
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#include "conn.h"
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#include "imp.h"
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#include "ngircd.h"
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#include "client.h"
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#include "conf.h"
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#include "conn-zip.h"
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#include "conn-func.h"
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#include "log.h"
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#include "parse.h"
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#include "tool.h"
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#ifdef RENDEZVOUS
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#include "rendezvous.h"
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#endif
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#include "exp.h"
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#define SERVER_WAIT (NONE - 1)
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LOCAL VOID Handle_Read PARAMS(( INT sock ));
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LOCAL BOOLEAN Handle_Write PARAMS(( CONN_ID Idx ));
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LOCAL VOID New_Connection PARAMS(( INT Sock ));
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LOCAL CONN_ID Socket2Index PARAMS(( INT Sock ));
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LOCAL VOID Read_Request PARAMS(( CONN_ID Idx ));
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LOCAL BOOLEAN Try_Write PARAMS(( CONN_ID Idx ));
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LOCAL BOOLEAN Handle_Buffer PARAMS(( CONN_ID Idx ));
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LOCAL VOID Check_Connections PARAMS(( VOID ));
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LOCAL VOID Check_Servers PARAMS(( VOID ));
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LOCAL VOID Init_Conn_Struct PARAMS(( CONN_ID Idx ));
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LOCAL BOOLEAN Init_Socket PARAMS(( INT Sock ));
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LOCAL VOID New_Server PARAMS(( INT Server, CONN_ID Idx ));
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LOCAL VOID Read_Resolver_Result PARAMS(( INT r_fd ));
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LOCAL VOID Simple_Message PARAMS(( INT Sock, CHAR *Msg ));
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LOCAL INT Count_Connections PARAMS(( struct sockaddr_in addr ));
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LOCAL fd_set My_Listeners;
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LOCAL fd_set My_Sockets;
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LOCAL fd_set My_Connects;
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#ifdef TCPWRAP
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INT allow_severity = LOG_INFO;
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INT deny_severity = LOG_ERR;
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#endif
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GLOBAL VOID
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Conn_Init( VOID )
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{
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/* Modul initialisieren: statische Strukturen "ausnullen". */
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CONN_ID i;
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/* Speicher fuer Verbindungs-Pool anfordern */
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Pool_Size = CONNECTION_POOL;
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if( Conf_MaxConnections > 0 )
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{
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/* konfiguriertes Limit beachten */
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if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
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}
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My_Connections = malloc( sizeof( CONNECTION ) * Pool_Size );
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if( ! My_Connections )
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{
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/* Speicher konnte nicht alloziert werden! */
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Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
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exit( 1 );
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}
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#ifdef DEBUG
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Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
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#endif
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/* zu Beginn haben wir keine Verbindungen */
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FD_ZERO( &My_Listeners );
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FD_ZERO( &My_Sockets );
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FD_ZERO( &My_Connects );
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/* Groesster File-Descriptor fuer select() */
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Conn_MaxFD = 0;
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/* Connection-Struktur initialisieren */
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for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
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/* Global write counter */
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WCounter = 0;
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} /* Conn_Init */
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GLOBAL VOID
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Conn_Exit( VOID )
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{
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/* Modul abmelden: alle noch offenen Connections
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* schliessen und freigeben. */
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CONN_ID idx;
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INT i;
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#ifdef DEBUG
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Log( LOG_DEBUG, "Shutting down all connections ..." );
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#endif
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#ifdef RENDEZVOUS
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Rendezvous_UnregisterListeners( );
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#endif
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/* Sockets schliessen */
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for( i = 0; i < Conn_MaxFD + 1; i++ )
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{
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if( FD_ISSET( i, &My_Sockets ))
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{
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for( idx = 0; idx < Pool_Size; idx++ )
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{
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if( My_Connections[idx].sock == i ) break;
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}
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if( FD_ISSET( i, &My_Listeners ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Listening socket %d closed.", i );
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#endif
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}
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else if( FD_ISSET( i, &My_Connects ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Connection %d closed during creation (socket %d).", idx, i );
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#endif
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}
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else if( idx < Pool_Size )
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{
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if( NGIRCd_SignalRestart ) Conn_Close( idx, NULL, "Server going down (restarting)", TRUE );
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else Conn_Close( idx, NULL, "Server going down", TRUE );
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}
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else
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{
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Log( LOG_WARNING, "Closing unknown connection %d ...", i );
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close( i );
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}
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}
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}
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free( My_Connections );
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My_Connections = NULL;
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Pool_Size = 0;
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} /* Conn_Exit */
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GLOBAL INT
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Conn_InitListeners( VOID )
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{
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/* Initialize ports on which the server should accept connections */
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INT created, i;
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created = 0;
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for( i = 0; i < Conf_ListenPorts_Count; i++ )
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{
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if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
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else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
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}
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return created;
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} /* Conn_InitListeners */
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GLOBAL VOID
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Conn_ExitListeners( VOID )
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{
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/* Close down all listening sockets */
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INT i;
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#ifdef RENDEZVOUS
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Rendezvous_UnregisterListeners( );
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#endif
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Log( LOG_INFO, "Shutting down all listening sockets ..." );
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for( i = 0; i < Conn_MaxFD + 1; i++ )
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{
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if( FD_ISSET( i, &My_Sockets ) && FD_ISSET( i, &My_Listeners ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Listening socket %d closed.", i );
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#endif
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}
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}
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} /* Conn_ExitListeners */
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GLOBAL BOOLEAN
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Conn_NewListener( CONST UINT Port )
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{
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/* Create new listening socket on specified port */
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struct sockaddr_in addr;
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struct in_addr inaddr;
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INT sock;
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#ifdef RENDEZVOUS
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CHAR name[CLIENT_ID_LEN], *info;
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#endif
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/* Server-"Listen"-Socket initialisieren */
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memset( &addr, 0, sizeof( addr ));
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memset( &inaddr, 0, sizeof( inaddr ));
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addr.sin_family = AF_INET;
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addr.sin_port = htons( Port );
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if( Conf_ListenAddress[0] )
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{
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#ifdef HAVE_INET_ATON
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if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
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#else
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inaddr.s_addr = inet_addr( Conf_ListenAddress );
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if( inaddr.s_addr == (unsigned)-1 )
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#endif
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{
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Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!", Conf_ListenAddress, Port, Conf_ListenAddress );
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return FALSE;
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}
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}
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else inaddr.s_addr = htonl( INADDR_ANY );
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addr.sin_addr = inaddr;
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/* Socket erzeugen */
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sock = socket( PF_INET, SOCK_STREAM, 0);
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if( sock < 0 )
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{
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Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
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return FALSE;
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}
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if( ! Init_Socket( sock )) return FALSE;
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/* an Port binden */
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if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 )
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{
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Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
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close( sock );
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return FALSE;
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}
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/* in "listen mode" gehen :-) */
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if( listen( sock, 10 ) != 0 )
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{
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Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno ));
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close( sock );
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return FALSE;
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}
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/* Neuen Listener in Strukturen einfuegen */
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FD_SET( sock, &My_Listeners );
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FD_SET( sock, &My_Sockets );
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if( sock > Conn_MaxFD ) Conn_MaxFD = sock;
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if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
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else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
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#ifdef RENDEZVOUS
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/* Get best server description text */
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if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
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else
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{
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/* Use server info string */
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info = NULL;
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if( Conf_ServerInfo[0] == '[' )
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{
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/* Cut off leading hostname part in "[]" */
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info = strchr( Conf_ServerInfo, ']' );
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if( info )
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{
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info++;
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while( *info == ' ' ) info++;
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}
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}
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if( ! info ) info = Conf_ServerInfo;
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}
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/* Add port number to description if non-standard */
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if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port );
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else strlcpy( name, info, sizeof( name ));
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/* Register service */
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Rendezvous_Register( name, RENDEZVOUS_TYPE, Port );
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#endif
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return TRUE;
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} /* Conn_NewListener */
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GLOBAL VOID
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Conn_Handler( VOID )
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{
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/* "Hauptschleife": Aktive Verbindungen ueberwachen. Folgende Aktionen
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* werden dabei durchgefuehrt, bis der Server terminieren oder neu
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* starten soll:
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*
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* - neue Verbindungen annehmen,
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* - Server-Verbindungen aufbauen,
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* - geschlossene Verbindungen loeschen,
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* - volle Schreibpuffer versuchen zu schreiben,
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* - volle Lesepuffer versuchen zu verarbeiten,
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* - Antworten von Resolver Sub-Prozessen annehmen.
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*/
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fd_set read_sockets, write_sockets;
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struct timeval tv;
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time_t start, t;
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CONN_ID i, idx;
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BOOLEAN timeout;
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start = time( NULL );
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while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart ))
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{
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timeout = TRUE;
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#ifdef RENDEZVOUS
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Rendezvous_Handler( );
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#endif
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/* Should the configuration be reloaded? */
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if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
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/* Check configured servers and established links */
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Check_Servers( );
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Check_Connections( );
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t = time( NULL );
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/* noch volle Lese-Buffer suchen */
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for( i = 0; i < Pool_Size; i++ )
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{
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if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 ) &&
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( My_Connections[i].delaytime < t ))
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{
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/* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
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if( Handle_Buffer( i )) timeout = FALSE;
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}
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}
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/* noch volle Schreib-Puffer suchen */
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FD_ZERO( &write_sockets );
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for( i = 0; i < Pool_Size; i++ )
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{
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#ifdef ZLIB
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if(( My_Connections[i].sock > NONE ) && (( My_Connections[i].wdatalen > 0 ) || ( My_Connections[i].zip.wdatalen > 0 )))
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#else
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if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].wdatalen > 0 ))
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#endif
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{
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/* Socket der Verbindung in Set aufnehmen */
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FD_SET( My_Connections[i].sock, &write_sockets );
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}
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}
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/* Sockets mit im Aufbau befindlichen ausgehenden Verbindungen suchen */
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for( i = 0; i < Pool_Size; i++ )
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{
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if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects ))) FD_SET( My_Connections[i].sock, &write_sockets );
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}
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/* von welchen Sockets koennte gelesen werden? */
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read_sockets = My_Sockets;
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for( i = 0; i < Pool_Size; i++ )
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{
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if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].host[0] == '\0' ))
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{
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/* Hier muss noch auf den Resolver Sub-Prozess gewartet werden */
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FD_CLR( My_Connections[i].sock, &read_sockets );
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}
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if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects )))
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{
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/* Hier laeuft noch ein asyncrones connect() */
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FD_CLR( My_Connections[i].sock, &read_sockets );
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}
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if( My_Connections[i].delaytime > t )
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{
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/* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
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FD_CLR( My_Connections[i].sock, &read_sockets );
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}
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}
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for( i = 0; i < Conn_MaxFD + 1; i++ )
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{
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/* Pipes von Resolver Sub-Prozessen aufnehmen */
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if( FD_ISSET( i, &Resolver_FDs ))
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{
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FD_SET( i, &read_sockets );
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}
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}
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/* Timeout initialisieren */
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tv.tv_usec = 0;
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if( timeout ) tv.tv_sec = 1;
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else tv.tv_sec = 0;
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/* Auf Aktivitaet warten */
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i = select( Conn_MaxFD + 1, &read_sockets, &write_sockets, NULL, &tv );
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if( i == 0 )
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{
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/* keine Veraenderung an den Sockets */
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continue;
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}
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if( i == -1 )
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{
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/* Fehler (z.B. Interrupt) */
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if( errno != EINTR )
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{
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Log( LOG_EMERG, "Conn_Handler(): select(): %s!", strerror( errno ));
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Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
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exit( 1 );
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}
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continue;
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}
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/* Koennen Daten geschrieben werden? */
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for( i = 0; i < Conn_MaxFD + 1; i++ )
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{
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if( ! FD_ISSET( i, &write_sockets )) continue;
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/* Es kann geschrieben werden ... */
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idx = Socket2Index( i );
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if( idx == NONE ) continue;
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if( ! Handle_Write( idx ))
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{
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/* Fehler beim Schreiben! Diesen Socket nun
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* auch aus dem Read-Set entfernen: */
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FD_CLR( i, &read_sockets );
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}
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}
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/* Daten zum Lesen vorhanden? */
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for( i = 0; i < Conn_MaxFD + 1; i++ )
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{
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if( FD_ISSET( i, &read_sockets )) Handle_Read( i );
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}
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}
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if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
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else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
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} /* Conn_Handler */
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#ifdef PROTOTYPES
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GLOBAL BOOLEAN
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Conn_WriteStr( CONN_ID Idx, CHAR *Format, ... )
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#else
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GLOBAL BOOLEAN
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Conn_WriteStr( Idx, Format, va_alist )
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CONN_ID Idx;
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CHAR *Format;
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va_dcl
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#endif
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{
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/* String in Socket schreiben. CR+LF wird von dieser Funktion
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* automatisch angehaengt. Im Fehlerfall wird dir Verbindung
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* getrennt und FALSE geliefert. */
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CHAR buffer[COMMAND_LEN];
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BOOLEAN ok;
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va_list ap;
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assert( Idx > NONE );
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assert( Format != NULL );
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#ifdef PROTOTYPES
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va_start( ap, Format );
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#else
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va_start( ap );
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#endif
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if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) == COMMAND_LEN - 2 )
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{
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Log( LOG_CRIT, "Text too long to send (connection %d)!", Idx );
|
|
Conn_Close( Idx, "Text too long to send!", NULL, FALSE );
|
|
return FALSE;
|
|
}
|
|
|
|
#ifdef SNIFFER
|
|
if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer );
|
|
#endif
|
|
|
|
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 )
|
|
{
|
|
/* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
|
|
* der Client disconnectiert und FALSE geliefert. */
|
|
|
|
assert( Idx > NONE );
|
|
assert( Data != NULL );
|
|
assert( Len > 0 );
|
|
|
|
/* Ist der entsprechende Socket ueberhaupt noch offen? In einem
|
|
* "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
|
|
* ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
|
|
* 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 );
|
|
#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 )
|
|
{
|
|
/* 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;
|
|
|
|
/* nun neu pruefen: */
|
|
if( WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - Len <= 0 )
|
|
{
|
|
Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
|
|
Conn_Close( Idx, "Write buffer overflow!", NULL, FALSE );
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
#ifdef ZLIB
|
|
if( My_Connections[Idx].options & CONN_ZIP )
|
|
{
|
|
/* Daten komprimieren und in Puffer kopieren */
|
|
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;
|
|
My_Connections[Idx].bytes_out += Len;
|
|
}
|
|
|
|
/* Adjust global write counter */
|
|
WCounter += Len;
|
|
|
|
return TRUE;
|
|
} /* Conn_Write */
|
|
|
|
|
|
GLOBAL VOID
|
|
Conn_Close( CONN_ID Idx, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN InformClient )
|
|
{
|
|
/* Close connection. Open pipes of asyncronous resolver
|
|
* sub-processes are closed down. */
|
|
|
|
CLIENT *c;
|
|
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 );
|
|
|
|
/* Is this link already shutting down? */
|
|
if( My_Connections[Idx].options & CONN_ISCLOSING )
|
|
{
|
|
/* Conn_Close() has been called recursively for this link;
|
|
* probabe reason: Try_Write() failed -- see below. */
|
|
return;
|
|
}
|
|
|
|
/* Mark link as "closing" */
|
|
My_Connections[Idx].options |= CONN_ISCLOSING;
|
|
|
|
/* Search client, if any */
|
|
c = Client_GetFromConn( Idx );
|
|
|
|
/* 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_ThisServer( ), NOTICE_TXTPREFIX, (DOUBLE)My_Connections[Idx].bytes_in / 1024, (DOUBLE)My_Connections[Idx].bytes_out / 1024 );
|
|
}
|
|
#endif
|
|
|
|
/* Send ERROR to client (see RFC!) */
|
|
if( FwdMsg ) Conn_WriteStr( Idx, "ERROR :%s", FwdMsg );
|
|
else Conn_WriteStr( Idx, "ERROR :Closing connection." );
|
|
if( My_Connections[Idx].sock == NONE ) return;
|
|
}
|
|
|
|
/* Try to write out the write buffer */
|
|
(VOID)Try_Write( Idx );
|
|
|
|
/* Shut down socket */
|
|
if( close( My_Connections[Idx].sock ) != 0 )
|
|
{
|
|
/* Oops, we can't close the socket!? This is fatal! */
|
|
Log( LOG_EMERG, "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 ));
|
|
Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
|
|
exit( 1 );
|
|
}
|
|
|
|
/* Mark socket as invalid: */
|
|
FD_CLR( My_Connections[Idx].sock, &My_Sockets );
|
|
FD_CLR( My_Connections[Idx].sock, &My_Connects );
|
|
My_Connections[Idx].sock = NONE;
|
|
|
|
/* 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( 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 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 );
|
|
}
|
|
|
|
/* Is there a resolver sub-process running? */
|
|
if( My_Connections[Idx].res_stat )
|
|
{
|
|
/* Free resolver structures */
|
|
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 );
|
|
}
|
|
|
|
/* Servers: Modify time of next connect attempt? */
|
|
Conf_UnsetServer( Idx );
|
|
|
|
#ifdef ZLIB
|
|
/* Clean up zlib, if link was compressed */
|
|
if( Conn_Options( Idx ) & CONN_ZIP )
|
|
{
|
|
inflateEnd( &My_Connections[Idx].zip.in );
|
|
deflateEnd( &My_Connections[Idx].zip.out );
|
|
}
|
|
#endif
|
|
|
|
/* Clean up connection structure (=free it) */
|
|
Init_Conn_Struct( Idx );
|
|
} /* Conn_Close */
|
|
|
|
|
|
GLOBAL VOID
|
|
Conn_SyncServerStruct( VOID )
|
|
{
|
|
/* Synchronize server structures (connection IDs):
|
|
* connections <-> configuration */
|
|
|
|
CLIENT *client;
|
|
CONN_ID i;
|
|
INT c;
|
|
|
|
for( i = 0; i < Pool_Size; i++ )
|
|
{
|
|
/* Established connection? */
|
|
if( My_Connections[i].sock <= NONE ) continue;
|
|
|
|
/* Server connection? */
|
|
client = Client_GetFromConn( i );
|
|
if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
|
|
|
|
for( c = 0; c < MAX_SERVERS; c++ )
|
|
{
|
|
/* Configured server? */
|
|
if( ! Conf_Server[c].host[0] ) continue;
|
|
|
|
/* Duplicate? */
|
|
if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
|
|
}
|
|
}
|
|
} /* SyncServerStruct */
|
|
|
|
|
|
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 );
|
|
|
|
/* sind ueberhaupt Daten vorhanden? */
|
|
#ifdef ZLIB
|
|
if(( ! My_Connections[Idx].wdatalen > 0 ) && ( ! My_Connections[Idx].zip.wdatalen )) return TRUE;
|
|
#else
|
|
if( ! My_Connections[Idx].wdatalen > 0 ) return TRUE;
|
|
#endif
|
|
|
|
/* Timeout initialisieren: 0 Sekunden, also nicht blockieren */
|
|
tv.tv_sec = 0; tv.tv_usec = 0;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
if( FD_ISSET( My_Connections[Idx].sock, &write_socket )) return Handle_Write( Idx );
|
|
else return TRUE;
|
|
} /* Try_Write */
|
|
|
|
|
|
LOCAL VOID
|
|
Handle_Read( INT Sock )
|
|
{
|
|
/* Aktivitaet auf einem Socket verarbeiten:
|
|
* - neue Clients annehmen,
|
|
* - Daten von Clients verarbeiten,
|
|
* - Resolver-Rueckmeldungen annehmen. */
|
|
|
|
CONN_ID idx;
|
|
|
|
assert( Sock > NONE );
|
|
|
|
if( FD_ISSET( Sock, &My_Listeners ))
|
|
{
|
|
/* es ist einer unserer Listener-Sockets: es soll
|
|
* also eine neue Verbindung aufgebaut werden. */
|
|
|
|
New_Connection( Sock );
|
|
}
|
|
else if( FD_ISSET( Sock, &Resolver_FDs ))
|
|
{
|
|
/* Rueckmeldung von einem Resolver Sub-Prozess */
|
|
|
|
Read_Resolver_Result( Sock );
|
|
}
|
|
else
|
|
{
|
|
/* Ein Client Socket: entweder ein User oder Server */
|
|
|
|
idx = Socket2Index( Sock );
|
|
if( idx > NONE ) Read_Request( idx );
|
|
}
|
|
} /* Handle_Read */
|
|
|
|
|
|
LOCAL BOOLEAN
|
|
Handle_Write( CONN_ID Idx )
|
|
{
|
|
/* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
|
|
|
|
INT len, res, err;
|
|
socklen_t sock_len;
|
|
CLIENT *c;
|
|
|
|
assert( Idx > NONE );
|
|
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 */
|
|
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 ))
|
|
{
|
|
/* 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[Conf_GetServer( Idx )].port, Idx, strerror( err ));
|
|
|
|
/* Clean up socket, connection and client structures */
|
|
FD_CLR( My_Connections[Idx].sock, &My_Sockets );
|
|
c = Client_GetFromConn( Idx );
|
|
if( c ) Client_DestroyNow( c );
|
|
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 FALSE;
|
|
}
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Connection %d with \"%s:%d\" established, now sendig PASS and SERVER ...", Idx, My_Connections[Idx].host, Conf_Server[Conf_GetServer( Idx )].port );
|
|
#endif
|
|
|
|
/* PASS und SERVER verschicken */
|
|
Conn_WriteStr( Idx, "PASS %s %s", Conf_Server[Conf_GetServer( Idx )].pwd_out, NGIRCd_ProtoID );
|
|
return Conn_WriteStr( Idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
|
|
}
|
|
|
|
#ifdef ZLIB
|
|
/* Schreibpuffer leer, aber noch Daten im Kompressionsbuffer?
|
|
* Dann muss dieser nun geflushed werden! */
|
|
if( My_Connections[Idx].wdatalen == 0 ) Zip_Flush( Idx );
|
|
#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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Puffer anpassen */
|
|
My_Connections[Idx].wdatalen -= len;
|
|
memmove( My_Connections[Idx].wbuf, My_Connections[Idx].wbuf + len, My_Connections[Idx].wdatalen );
|
|
|
|
return TRUE;
|
|
} /* Handle_Write */
|
|
|
|
|
|
LOCAL VOID
|
|
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;
|
|
RES_STAT *s;
|
|
CONN_ID idx;
|
|
CLIENT *c;
|
|
POINTER *ptr;
|
|
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;
|
|
}
|
|
|
|
#ifdef TCPWRAP
|
|
/* Validate socket using TCP Wrappers */
|
|
request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
|
|
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;
|
|
}
|
|
#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! */
|
|
Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP!", inet_ntoa( new_addr.sin_addr ), cnt);
|
|
Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP!" );
|
|
close( new_sock );
|
|
return;
|
|
}
|
|
|
|
/* 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 */
|
|
if( Pool_Size >= Conf_MaxConnections )
|
|
{
|
|
/* 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;
|
|
}
|
|
if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
|
|
}
|
|
if( new_size < Pool_Size )
|
|
{
|
|
Log( LOG_ALERT, "Can't accespt connection: limit (%d) reached -- overflow!", Pool_Size );
|
|
Simple_Message( new_sock, "ERROR :Connection limit reached" );
|
|
close( new_sock );
|
|
return;
|
|
}
|
|
|
|
/* 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 )
|
|
{
|
|
/* 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]" );
|
|
Simple_Message( new_sock, "ERROR: Internal error" );
|
|
close( new_sock );
|
|
return;
|
|
}
|
|
|
|
/* Struktur umkopieren ... */
|
|
memcpy( ptr, My_Connections, sizeof( CONNECTION ) * Pool_Size );
|
|
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [malloc()/memcpy()]", new_size, sizeof( CONNECTION ) * new_size );
|
|
#endif
|
|
}
|
|
#ifdef DEBUG
|
|
else 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 = 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 )
|
|
{
|
|
Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
|
|
Simple_Message( new_sock, "ERROR :Internal error" );
|
|
close( new_sock );
|
|
return;
|
|
}
|
|
|
|
/* Verbindung registrieren */
|
|
Init_Conn_Struct( idx );
|
|
My_Connections[idx].sock = new_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;
|
|
|
|
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 */
|
|
strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
|
|
Client_SetHostname( c, My_Connections[idx].host );
|
|
s = Resolve_Addr( &new_addr );
|
|
if( s )
|
|
{
|
|
/* Sub-Prozess wurde asyncron gestartet */
|
|
My_Connections[idx].res_stat = s;
|
|
}
|
|
|
|
/* Penalty-Zeit setzen */
|
|
Conn_SetPenalty( idx, 4 );
|
|
} /* New_Connection */
|
|
|
|
|
|
LOCAL CONN_ID
|
|
Socket2Index( INT Sock )
|
|
{
|
|
/* zum Socket passende Connection suchen */
|
|
|
|
CONN_ID idx;
|
|
|
|
assert( Sock > NONE );
|
|
|
|
for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
|
|
|
|
if( idx >= Pool_Size )
|
|
{
|
|
/* 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
|
|
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 ZLIB
|
|
CLIENT *c;
|
|
#endif
|
|
|
|
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 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 ZLIB
|
|
if(( bsize - My_Connections[Idx].rdatalen - 1 < 1 ) || ( ZREADBUFFER_LEN - My_Connections[Idx].zip.rdatalen < 1 ))
|
|
#else
|
|
if( bsize - My_Connections[Idx].rdatalen - 1 < 1 )
|
|
#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 );
|
|
return;
|
|
}
|
|
|
|
#ifdef 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 (%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( 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 );
|
|
return;
|
|
}
|
|
|
|
/* Connection-Statistik aktualisieren */
|
|
My_Connections[Idx].bytes_in += len;
|
|
|
|
/* Timestamp aktualisieren */
|
|
My_Connections[Idx].lastdata = time( NULL );
|
|
|
|
Handle_Buffer( Idx );
|
|
} /* Read_Request */
|
|
|
|
|
|
LOCAL BOOLEAN
|
|
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). */
|
|
|
|
#ifndef STRICT_RFC
|
|
CHAR *ptr1, *ptr2;
|
|
#endif
|
|
CHAR *ptr;
|
|
INT len, delta;
|
|
BOOLEAN action, result;
|
|
#ifdef ZLIB
|
|
BOOLEAN old_z;
|
|
#endif
|
|
|
|
result = FALSE;
|
|
do
|
|
{
|
|
/* Check penalty */
|
|
if( My_Connections[Idx].delaytime > time( NULL )) return result;
|
|
|
|
#ifdef ZLIB
|
|
/* ggf. noch unkomprimiete Daten weiter entpacken */
|
|
if( My_Connections[Idx].options & 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;
|
|
#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' );
|
|
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 ZLIB
|
|
/* merken, ob Stream bereits komprimiert wird */
|
|
old_z = My_Connections[Idx].options & CONN_ZIP;
|
|
#endif
|
|
|
|
if( len > delta )
|
|
{
|
|
/* Es wurde ein Request gelesen */
|
|
My_Connections[Idx].msg_in++;
|
|
if( ! Parse_Request( Idx, My_Connections[Idx].rbuf )) return FALSE;
|
|
else action = TRUE;
|
|
}
|
|
|
|
/* Puffer anpassen */
|
|
My_Connections[Idx].rdatalen -= len;
|
|
memmove( My_Connections[Idx].rbuf, My_Connections[Idx].rbuf + len, My_Connections[Idx].rdatalen );
|
|
|
|
#ifdef 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;
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", My_Connections[Idx].zip.rdatalen );
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if( action ) result = TRUE;
|
|
} while( action );
|
|
|
|
return result;
|
|
} /* Handle_Buffer */
|
|
|
|
|
|
LOCAL 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. */
|
|
|
|
CLIENT *c;
|
|
CONN_ID 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 )
|
|
{
|
|
/* Timeout */
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
|
|
#endif
|
|
Conn_Close( i, NULL, "Ping timeout", TRUE );
|
|
}
|
|
}
|
|
else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
|
|
{
|
|
/* es muss ein PING gesendet werden */
|
|
#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 */
|
|
if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
|
|
{
|
|
/* Timeout */
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Connection %d timed out ...", i );
|
|
#endif
|
|
Conn_Close( i, NULL, "Timeout", FALSE );
|
|
}
|
|
}
|
|
}
|
|
} /* Check_Connections */
|
|
|
|
|
|
LOCAL VOID
|
|
Check_Servers( VOID )
|
|
{
|
|
/* Check if we can establish further server links */
|
|
|
|
RES_STAT *s;
|
|
CONN_ID idx;
|
|
INT i, n;
|
|
|
|
/* Serach all connections, are there results from the resolver? */
|
|
for( idx = 0; idx < Pool_Size; idx++ )
|
|
{
|
|
if( My_Connections[idx].sock != SERVER_WAIT ) continue;
|
|
|
|
/* IP resolved? */
|
|
if( My_Connections[idx].res_stat == NULL ) New_Server( Conf_GetServer( idx ), idx );
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* Is there already a connection in this group? */
|
|
if( Conf_Server[i].group > NONE )
|
|
{
|
|
for( n = 0; n < MAX_SERVERS; n++ )
|
|
{
|
|
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;
|
|
}
|
|
|
|
/* Check last connect attempt? */
|
|
if( Conf_Server[i].lasttry > time( NULL ) - Conf_ConnectRetry ) continue;
|
|
|
|
/* Okay, try to connect now */
|
|
Conf_Server[i].lasttry = time( NULL );
|
|
|
|
/* 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;
|
|
Conf_Server[i].conn_id = idx;
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
} /* Check_Servers */
|
|
|
|
|
|
LOCAL VOID
|
|
New_Server( INT Server, CONN_ID Idx )
|
|
{
|
|
/* Establish new server link */
|
|
|
|
struct sockaddr_in new_addr;
|
|
struct in_addr inaddr;
|
|
INT res, new_sock;
|
|
CLIENT *c;
|
|
|
|
assert( Server > NONE );
|
|
assert( Idx > NONE );
|
|
|
|
/* Did we get a valid IP address? */
|
|
if( ! Conf_Server[Server].ip[0] )
|
|
{
|
|
/* No. Free connection structure and abort: */
|
|
Init_Conn_Struct( Idx );
|
|
Conf_Server[Server].conn_id = NONE;
|
|
Log( LOG_ERR, "Can't connect to \"%s\" (connection %d): ip address unknown!", Conf_Server[Server].host, Idx );
|
|
return;
|
|
}
|
|
|
|
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 );
|
|
|
|
#ifdef HAVE_INET_ATON
|
|
if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
|
|
#else
|
|
memset( &inaddr, 0, sizeof( inaddr ));
|
|
inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
|
|
if( inaddr.s_addr == (unsigned)-1 )
|
|
#endif
|
|
{
|
|
/* Can't convert IP address */
|
|
Init_Conn_Struct( Idx );
|
|
Conf_Server[Server].conn_id = NONE;
|
|
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;
|
|
}
|
|
|
|
memset( &new_addr, 0, sizeof( new_addr ));
|
|
new_addr.sin_family = AF_INET;
|
|
new_addr.sin_addr = inaddr;
|
|
new_addr.sin_port = htons( Conf_Server[Server].port );
|
|
|
|
new_sock = socket( PF_INET, SOCK_STREAM, 0 );
|
|
if ( new_sock < 0 )
|
|
{
|
|
/* Can't create socket */
|
|
Init_Conn_Struct( Idx );
|
|
Conf_Server[Server].conn_id = NONE;
|
|
Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
|
|
return;
|
|
}
|
|
|
|
if( ! Init_Socket( new_sock )) return;
|
|
|
|
res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
|
|
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 );
|
|
Conf_Server[Server].conn_id = NONE;
|
|
return;
|
|
}
|
|
|
|
/* Client-Struktur initialisieren */
|
|
c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, FALSE );
|
|
if( ! c )
|
|
{
|
|
/* Can't create new client structure */
|
|
close( new_sock );
|
|
Init_Conn_Struct( Idx );
|
|
Conf_Server[Server].conn_id = NONE;
|
|
Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
|
|
return;
|
|
}
|
|
Client_SetIntroducer( c, c );
|
|
Client_SetToken( c, TOKEN_OUTBOUND );
|
|
|
|
/* Register connection */
|
|
My_Connections[Idx].sock = new_sock;
|
|
My_Connections[Idx].addr = new_addr;
|
|
strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
|
|
|
|
/* Register new socket */
|
|
FD_SET( new_sock, &My_Sockets );
|
|
FD_SET( new_sock, &My_Connects );
|
|
if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock;
|
|
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
|
|
#endif
|
|
} /* New_Server */
|
|
|
|
|
|
LOCAL VOID
|
|
Init_Conn_Struct( CONN_ID Idx )
|
|
{
|
|
/* Connection-Struktur initialisieren */
|
|
|
|
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].starttime = time( NULL );
|
|
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].msg_in = 0;
|
|
My_Connections[Idx].msg_out = 0;
|
|
My_Connections[Idx].flag = 0;
|
|
My_Connections[Idx].options = 0;
|
|
|
|
#ifdef 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
|
|
} /* Init_Conn_Struct */
|
|
|
|
|
|
LOCAL BOOLEAN
|
|
Init_Socket( INT Sock )
|
|
{
|
|
/* Socket-Optionen setzen */
|
|
|
|
INT on = 1;
|
|
|
|
#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 ));
|
|
close( Sock );
|
|
return FALSE;
|
|
}
|
|
#endif
|
|
if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &on, (socklen_t)sizeof( on )) != 0)
|
|
{
|
|
Log( LOG_ERR, "Can't set socket options: %s!", strerror( errno ));
|
|
/* dieser Fehler kann ignoriert werden. */
|
|
}
|
|
|
|
return TRUE;
|
|
} /* Init_Socket */
|
|
|
|
|
|
LOCAL VOID
|
|
Read_Resolver_Result( INT r_fd )
|
|
{
|
|
/* Ergebnis von Resolver Sub-Prozess aus Pipe lesen
|
|
* und entsprechende Connection aktualisieren */
|
|
|
|
CHAR result[HOST_LEN];
|
|
CLIENT *c;
|
|
INT len, i, n;
|
|
|
|
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';
|
|
|
|
/* zugehoerige Connection suchen */
|
|
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( i >= Pool_Size )
|
|
{
|
|
/* Opsa! Keine passende Connection gefunden!? Vermutlich
|
|
* wurde sie schon wieder geschlossen. */
|
|
close( r_fd );
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Resolver: Got result for unknown connection!?" );
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
Log( LOG_DEBUG, "Resolver: %s is \"%s\".", My_Connections[i].host, result );
|
|
#endif
|
|
|
|
/* 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;
|
|
|
|
if( My_Connections[i].sock > NONE )
|
|
{
|
|
/* Eingehende Verbindung: Hostnamen setzen */
|
|
c = Client_GetFromConn( i );
|
|
assert( c != NULL );
|
|
strlcpy( My_Connections[i].host, result, sizeof( My_Connections[i].host ));
|
|
Client_SetHostname( c, result );
|
|
}
|
|
else
|
|
{
|
|
/* Ausgehende Verbindung (=Server): IP setzen */
|
|
n = Conf_GetServer( i );
|
|
if( n > NONE ) strlcpy( Conf_Server[n].ip, result, sizeof( Conf_Server[n].ip ));
|
|
else Log( LOG_ERR, "Got resolver result for non-configured server!?" );
|
|
}
|
|
|
|
/* Penalty-Zeit zurueck setzen */
|
|
Conn_ResetPenalty( i );
|
|
} /* Read_Resolver_Result */
|
|
|
|
|
|
LOCAL VOID
|
|
Simple_Message( INT Sock, CHAR *Msg )
|
|
{
|
|
/* 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 );
|
|
|
|
(VOID)send( Sock, Msg, strlen( Msg ), 0 );
|
|
(VOID)send( Sock, "\r\n", 2, 0 );
|
|
} /* Simple_Error */
|
|
|
|
|
|
LOCAL INT
|
|
Count_Connections( struct sockaddr_in addr_in )
|
|
{
|
|
INT i, cnt;
|
|
|
|
cnt = 0;
|
|
for( i = 0; i < Pool_Size; i++ )
|
|
{
|
|
if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
|
|
}
|
|
return cnt;
|
|
} /* Count_Connections */
|
|
|
|
|
|
/* -eof- */
|