/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2004 Alexander Barton <alex@barton.de>
*
- * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
- * der GNU General Public License (GPL), wie von der Free Software Foundation
- * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
- * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
- * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
- * der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
+ * 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 1.11 2001/12/25 23:15:16 alex Exp $
- *
- * connect.h: Verwaltung aller Netz-Verbindungen ("connections")
- *
- * $Log: conn.c,v $
- * Revision 1.11 2001/12/25 23:15:16 alex
- * - buffer werden nun periodisch geprueft, keine haengenden Clients mehr.
- *
- * Revision 1.10 2001/12/25 22:03:47 alex
- * - Conn_Close() eingefuehrt: war die lokale Funktion Close_Connection().
- *
- * Revision 1.9 2001/12/24 01:32:33 alex
- * - in Conn_WriteStr() wurde das CR+LF nicht angehaengt!
- * - Fehler-Ausgaben vereinheitlicht.
- *
- * Revision 1.8 2001/12/23 22:02:54 alex
- * - Conn_WriteStr() nimmt nun variable Parameter,
- * - diverse kleinere Aenderungen.
- *
- * Revision 1.7 2001/12/21 22:24:25 alex
- * - kleinere Aenderungen an den Log-Meldungen,
- * - Parse_Request() wird aufgerufen.
- *
- * Revision 1.6 2001/12/15 00:11:55 alex
- * - Lese- und Schreib-Puffer implementiert.
- * - einige neue (Unter-)Funktionen eingefuehrt.
- * - diverse weitere kleinere Aenderungen.
- *
- * Revision 1.5 2001/12/14 08:16:47 alex
- * - Begonnen, Client-spezifische Lesepuffer zu implementieren.
- * - Umstellung auf Datentyp "CONN_ID".
- *
- * Revision 1.4 2001/12/13 02:04:16 alex
- * - boesen "Speicherschiesser" in Log() gefixt.
- *
- * Revision 1.3 2001/12/13 01:33:09 alex
- * - Conn_Handler() unterstuetzt nun einen Timeout.
- * - fuer Verbindungen werden keine FILE-Handles mehr benutzt.
- * - kleinere "Code Cleanups" ;-)
- *
- * Revision 1.2 2001/12/12 23:32:02 alex
- * - diverse Erweiterungen und Verbesserungen (u.a. sind nun mehrere
- * Verbindungen und Listen-Sockets moeglich).
- *
- * Revision 1.1 2001/12/12 17:18:38 alex
- * - Modul zur Verwaltung aller Netzwerk-Verbindungen begonnen.
+ * Connection management
*/
-#include <portab.h>
-#include "global.h"
+#define CONN_MODULE
-#include <imp.h>
+#include "portab.h"
+
+static char UNUSED id[] = "$Id: conn.c,v 1.147 2005/04/16 09:19:49 fw Exp $";
+
+#include "imp.h"
#include <assert.h>
-#include <stdarg.h>
+#ifdef PROTOTYPES
+# include <stdarg.h>
+#else
+# include <varargs.h>
+#endif
#include <stdio.h>
+#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
+#include <time.h>
#include <netinet/in.h>
-#include <arpa/inet.h>
+
+#ifdef HAVE_NETINET_IP_H
+# include <netinet/ip.h>
+#endif
+
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#else
+# define PF_INET AF_INET
+#endif
#ifdef HAVE_STDINT_H
-#include <stdint.h> /* u.a. fuer Mac OS X */
+# include <stdint.h> /* e.g. for Mac OS X */
#endif
+#ifdef TCPWRAP
+# include <tcpd.h> /* for TCP Wrappers */
+#endif
+
+#include "defines.h"
+#include "resolve.h"
+
+#include "exp.h"
+#include "conn.h"
+
+#include "imp.h"
#include "ngircd.h"
#include "client.h"
+#include "conf.h"
+#include "conn-zip.h"
+#include "conn-func.h"
#include "log.h"
#include "parse.h"
#include "tool.h"
-#include <exp.h>
-#include "conn.h"
-
-
-#define MAX_CONNECTIONS 100 /* max. Anzahl von Verbindungen an diesem Server */
-
-#define MAX_CMDLEN 512 /* max. Laenge eines Befehls, vgl. RFC 2812, 3.2 */
+#ifdef RENDEZVOUS
+# include "rendezvous.h"
+#endif
-#define READBUFFER_LEN 2 * MAX_CMDLEN /* Laenge des Lesepuffers je Verbindung (Bytes) */
-#define WRITEBUFFER_LEN 4096 /* Laenge des Schreibpuffers je Verbindung (Bytes) */
+#include "exp.h"
-typedef struct _Connection
-{
- INT sock; /* Socket Handle */
- struct sockaddr_in addr; /* Adresse des Client */
- CHAR rbuf[READBUFFER_LEN + 1]; /* Lesepuffer */
- INT rdatalen; /* Laenge der Daten im Lesepuffer */
- CHAR wbuf[WRITEBUFFER_LEN + 1]; /* Schreibpuffer */
- INT wdatalen; /* Laenge der Daten im Schreibpuffer */
-} CONNECTION;
+#define SERVER_WAIT (NONE - 1)
-LOCAL VOID Handle_Read( INT sock );
-LOCAL BOOLEAN Handle_Write( CONN_ID Idx );
-LOCAL VOID New_Connection( INT Sock );
-LOCAL CONN_ID Socket2Index( INT Sock );
-LOCAL VOID Read_Request( CONN_ID Idx );
-LOCAL BOOLEAN Try_Write( CONN_ID Idx );
-LOCAL VOID Handle_Buffer( CONN_ID Idx );
+LOCAL void Handle_Read PARAMS(( int sock ));
+LOCAL bool 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 bool Try_Write PARAMS(( CONN_ID Idx ));
+LOCAL bool Handle_Buffer PARAMS(( CONN_ID Idx ));
+LOCAL void Check_Connections PARAMS(( void ));
+LOCAL void Check_Servers PARAMS(( void ));
+LOCAL void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
+LOCAL bool Init_Socket PARAMS(( int Sock ));
+LOCAL void New_Server PARAMS(( int Server, CONN_ID Idx ));
+LOCAL void Read_Resolver_Result PARAMS(( int r_fd ));
+LOCAL void Simple_Message PARAMS(( int Sock, char *Msg ));
+LOCAL int Count_Connections PARAMS(( struct sockaddr_in addr ));
-
-LOCAL fd_set My_Listener;
+LOCAL fd_set My_Listeners;
LOCAL fd_set My_Sockets;
+LOCAL fd_set My_Connects;
-LOCAL INT My_Max_Fd;
-
-LOCAL CONNECTION My_Connections[MAX_CONNECTIONS];
+#ifdef TCPWRAP
+int allow_severity = LOG_INFO;
+int deny_severity = LOG_ERR;
+#endif
-GLOBAL VOID Conn_Init( VOID )
+GLOBAL void
+Conn_Init( void )
{
+ /* Modul initialisieren: statische Strukturen "ausnullen". */
+
CONN_ID i;
+ /* Speicher fuer Verbindungs-Pool anfordern */
+ Pool_Size = CONNECTION_POOL;
+ if( Conf_MaxConnections > 0 )
+ {
+ /* konfiguriertes Limit beachten */
+ if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
+ }
+ 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 );
+ }
+#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_Listener );
+ FD_ZERO( &My_Listeners );
FD_ZERO( &My_Sockets );
+ FD_ZERO( &My_Connects );
- My_Max_Fd = 0;
+ /* Groesster File-Descriptor fuer select() */
+ Conn_MaxFD = 0;
/* Connection-Struktur initialisieren */
- for( i = 0; i < MAX_CONNECTIONS; i++ ) My_Connections[i].sock = NONE;
+ 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;
+ int i;
+
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Shutting down all connections ..." );
+#endif
+
+#ifdef RENDEZVOUS
+ Rendezvous_UnregisterListeners( );
+#endif
/* Sockets schliessen */
- for( i = 0; i < My_Max_Fd + 1; i++ )
+ for( i = 0; i < Conn_MaxFD + 1; i++ )
{
if( FD_ISSET( i, &My_Sockets ))
{
- for( idx = 0; idx < MAX_CONNECTIONS; idx++ )
+ for( idx = 0; idx < Pool_Size; idx++ )
{
if( My_Connections[idx].sock == i ) break;
}
- if( idx < MAX_CONNECTIONS ) Conn_Close( idx, "Server going down ..." );
- else if( FD_ISSET( i, &My_Listener ))
+ if( FD_ISSET( i, &My_Listeners ))
{
close( i );
- Log( LOG_INFO, "Listening socket %d closed.", i );
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Listening socket %d closed.", i );
+#endif
+ }
+ else if( FD_ISSET( i, &My_Connects ))
+ {
+ close( i );
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Connection %d closed during creation (socket %d).", idx, i );
+#endif
+ }
+ else if( idx < Pool_Size )
+ {
+ if( NGIRCd_SignalRestart ) 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 );
- Log( LOG_WARNING, "Unknown connection %d closed.", i );
}
}
}
+
+ free( My_Connections );
+ My_Connections = NULL;
+ Pool_Size = 0;
} /* Conn_Exit */
-GLOBAL BOOLEAN Conn_New_Listener( CONST INT Port )
+GLOBAL int
+Conn_InitListeners( void )
{
- /* Neuen Listen-Socket erzeugen: der Server wartet dann
- * auf dem angegebenen Port auf Verbindungen. */
+ /* Initialize ports on which the server should accept connections */
+
+ int created, i;
+
+ 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!", (unsigned int) Conf_ListenPorts[i] );
+ }
+ return created;
+} /* Conn_InitListeners */
+
+
+GLOBAL void
+Conn_ExitListeners( void )
+{
+ /* Close down all listening sockets */
+
+ int i;
+
+#ifdef RENDEZVOUS
+ 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 );
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Listening socket %d closed.", i );
+#endif
+ }
+ }
+} /* Conn_ExitListeners */
+
+
+GLOBAL bool
+Conn_NewListener( const UINT16 Port )
+{
+ /* Create new listening socket on specified port */
struct sockaddr_in addr;
- INT sock, on = 1;
+ struct in_addr inaddr;
+ int sock;
+#ifdef RENDEZVOUS
+ 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 false;
+ }
+ }
+ 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_ALERT, "Can't create socket: %s!", strerror( errno ));
- return FALSE;
+ Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
+ return false;
}
- /* Socket-Optionen setzen */
- if( fcntl( sock, F_SETFL, O_NONBLOCK ) != 0 )
- {
- Log( LOG_ALERT, "Can't enable non-blocking mode: %s!", strerror( errno ));
- close( sock );
- return FALSE;
- }
- if( setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &on, (socklen_t)sizeof( on )) != 0)
- {
- Log( LOG_CRIT, "Can't set socket options: %s!", strerror( errno ));
- /* dieser Fehler kann ignoriert werden. */
- }
+ if( ! Init_Socket( sock )) return false;
/* an Port binden */
if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 )
{
- Log( LOG_ALERT, "Can't bind socket: %s!", strerror( errno ));
+ Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
close( sock );
- return FALSE;
+ return false;
}
/* in "listen mode" gehen :-) */
if( listen( sock, 10 ) != 0 )
{
- Log( LOG_ALERT, "Can't listen on soecket: %s!", strerror( errno ));
+ Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno ));
close( sock );
- return FALSE;
+ return false;
}
/* Neuen Listener in Strukturen einfuegen */
- FD_SET( sock, &My_Listener );
+ FD_SET( sock, &My_Listeners );
FD_SET( sock, &My_Sockets );
- if( sock > My_Max_Fd ) My_Max_Fd = sock;
+ 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 );
+
+#ifdef RENDEZVOUS
+ /* 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;
+ }
+
+ /* 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 ));
- Log( LOG_INFO, "Now listening on port %d, socket %d.", Port, sock );
+ /* Register service */
+ Rendezvous_Register( name, RENDEZVOUS_TYPE, Port );
+#endif
- return TRUE;
-} /* Conn_New_Listener */
+ return true;
+} /* Conn_NewListener */
-GLOBAL VOID Conn_Handler( INT Timeout )
+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.
+ */
+
fd_set read_sockets, write_sockets;
struct timeval tv;
- time_t start;
- INT i;
-
- /* Timeout initialisieren */
- tv.tv_sec = 0;
- tv.tv_usec = 50000;
+ time_t start, t;
+ CONN_ID i, idx;
+ bool timeout;
start = time( NULL );
- while( time( NULL ) - start < Timeout )
+ while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart ))
{
+ timeout = true;
+
+#ifdef RENDEZVOUS
+ 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 ) &&
+ ( My_Connections[i].delaytime < t ))
+ {
+ /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
+ if( Handle_Buffer( i )) timeout = false;
+ }
+ }
+
/* noch volle Schreib-Puffer suchen */
FD_ZERO( &write_sockets );
- for( i = 0; i < MAX_CONNECTIONS; i++ )
+ for( i = 0; i < Pool_Size; i++ )
{
- if(( My_Connections[i].sock >= 0 ) && ( My_Connections[i].wdatalen > 0 ))
+#ifdef ZLIB
+ if(( My_Connections[i].sock > NONE ) && (( My_Connections[i].wdatalen > 0 ) || ( My_Connections[i].zip.wdatalen > 0 )))
+#else
+ if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].wdatalen > 0 ))
+#endif
{
/* Socket der Verbindung in Set aufnehmen */
FD_SET( My_Connections[i].sock, &write_sockets );
}
}
-
- /* noch volle Lese-Buffer suchen */
- for( i = 0; i < MAX_CONNECTIONS; i++ )
+
+ /* Sockets mit im Aufbau befindlichen ausgehenden Verbindungen suchen */
+ for( i = 0; i < Pool_Size; i++ )
{
- if(( My_Connections[i].sock >= 0 ) && ( My_Connections[i].rdatalen > 0 ))
+ 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? */
+ read_sockets = My_Sockets;
+ for( i = 0; i < Pool_Size; i++ )
+ {
+ if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].host[0] == '\0' ))
{
- /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
- Handle_Buffer( i );
+ /* 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 );
+ }
+ if( My_Connections[i].delaytime > t )
+ {
+ /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
+ FD_CLR( My_Connections[i].sock, &read_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 );
}
}
- read_sockets = My_Sockets;
- if( select( My_Max_Fd + 1, &read_sockets, &write_sockets, NULL, &tv ) == -1 )
+ /* Timeout initialisieren */
+ tv.tv_usec = 0;
+ 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 )
{
- if( errno != EINTR ) Log( LOG_ALERT, "select(): %s!", strerror( errno ));
- return;
+ /* 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_NAME );
+ exit( 1 );
+ }
+ continue;
}
/* Koennen Daten geschrieben werden? */
- for( i = 0; i < My_Max_Fd + 1; i++ )
+ for( i = 0; i < Conn_MaxFD + 1; i++ )
{
- if( FD_ISSET( i, &write_sockets )) Handle_Write( Socket2Index( 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 < My_Max_Fd + 1; i++ )
+ for( i = 0; i < Conn_MaxFD + 1; i++ )
{
if( FD_ISSET( i, &read_sockets )) Handle_Read( i );
}
}
+
+ 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 */
-GLOBAL BOOLEAN Conn_WriteStr( CONN_ID Idx, CHAR *Format, ... )
+#ifdef PROTOTYPES
+GLOBAL bool
+Conn_WriteStr( CONN_ID Idx, char *Format, ... )
+#else
+GLOBAL bool
+Conn_WriteStr( Idx, Format, va_alist )
+CONN_ID Idx;
+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. */
+ * getrennt und false geliefert. */
- CHAR buffer[MAX_CMDLEN];
- BOOLEAN ok;
+ char buffer[COMMAND_LEN];
+ bool ok;
va_list ap;
+ assert( Idx > NONE );
+ assert( Format != NULL );
+
+#ifdef PROTOTYPES
va_start( ap, Format );
- if( vsnprintf( buffer, MAX_CMDLEN - 2, Format, ap ) == MAX_CMDLEN - 2 )
+#else
+ va_start( ap );
+#endif
+ if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 )
{
- Log( LOG_ALERT, "String too long to send (connection %d)!", Idx );
- Conn_Close( Idx, "Server error: String too long to send!" );
- return FALSE;
+ 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
- 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, int Len )
{
/* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
- * der Client disconnectiert und FALSE geliefert. */
+ * der Client disconnectiert und false geliefert. */
- assert( Idx >= 0 );
- assert( My_Connections[Idx].sock >= 0 );
+ assert( Idx > NONE );
assert( Data != NULL );
assert( Len > 0 );
- /* pruefen, ob Daten im Schreibpuffer sind. Wenn ja, zunaechst
- * pruefen, ob diese gesendet werden koennen */
- if( My_Connections[Idx].wdatalen > 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 )
{
- if( ! Try_Write( Idx )) return FALSE;
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
+#endif
+ return false;
}
- /* pruefen, ob im Schreibpuffer genuegend Platz ist */
+ /* 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 ... */
- Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
- Conn_Close( Idx, NULL );
- return FALSE;
- }
+ /* 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;
- /* Daten in Puffer kopieren */
- memcpy( My_Connections[Idx].wbuf + My_Connections[Idx].wdatalen, Data, Len );
- My_Connections[Idx].wdatalen += Len;
+ /* 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;
+ }
+ }
- /* pruefen, on Daten vorhanden sind und geschrieben werden koennen */
- if( My_Connections[Idx].wdatalen > 0 )
+#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
{
- if( ! Try_Write( Idx )) return FALSE;
+ /* 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;
}
- return TRUE;
+ /* Adjust global write counter */
+ WCounter += Len;
+
+ return true;
} /* Conn_Write */
-GLOBAL VOID Conn_Close( CONN_ID Idx, CHAR *Msg )
+GLOBAL void
+Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
{
- /* Verbindung schliessen */
-
- assert( Idx >= 0 );
- assert( My_Connections[Idx].sock >= 0 );
+ /* Close connection. Open pipes of asyncronous resolver
+ * sub-processes are closed down. */
+
+ CLIENT *c;
+ char *txt;
+ double in_k, out_k;
+#ifdef ZLIB
+ double in_z_k, out_z_k;
+ int in_p, out_p;
+#endif
- if( Msg ) Conn_WriteStr( Idx, "ERROR :%s", Msg );
+ assert( Idx > NONE );
- if( close( My_Connections[Idx].sock ) != 0 )
+ /* Is this link already shutting down? */
+ if( My_Connections[Idx].options & CONN_ISCLOSING )
{
- Log( LOG_ERR, "Error closing connection %d with %s:%d - %s!", Idx, inet_ntoa( My_Connections[Idx].addr.sin_addr ), ntohs( My_Connections[Idx].addr.sin_port), strerror( errno ));
+ /* Conn_Close() has been called recursively for this link;
+ * probabe reason: Try_Write() failed -- see below. */
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
+#endif
return;
}
- else
+
+ assert( My_Connections[Idx].sock > NONE );
+
+ /* Mark link as "closing" */
+ My_Connections[Idx].options |= CONN_ISCLOSING;
+
+ if( LogMsg ) txt = LogMsg;
+ else txt = FwdMsg;
+ if( ! txt ) txt = "Reason unknown";
+
+ 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 ));
+
+ /* Search client, if any */
+ c = Client_GetFromConn( Idx );
+
+ /* Should the client be informed? */
+ if( InformClient )
{
- Log( LOG_NOTICE, "Connection %d with %s:%d closed.", Idx, inet_ntoa( My_Connections[Idx].addr.sin_addr ), ntohs( My_Connections[Idx].addr.sin_port ));
+#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." );
}
- Client_Destroy( Client_GetFromConn( Idx ));
+ /* 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 );
+
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx );
+#endif
} /* Conn_Close */
-LOCAL BOOLEAN Try_Write( CONN_ID Idx )
+GLOBAL void
+Conn_SyncServerStruct( void )
{
- /* Versuchen, Daten aus dem Schreib-Puffer in den
- * Socket zu schreiben. */
+ /* 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 bool
+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 >= 0 );
- assert( My_Connections[Idx].sock >= 0 );
- assert( My_Connections[Idx].wdatalen > 0 );
+ 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, 0 ) == -1 )
+ if( select( My_Connections[Idx].sock + 1, NULL, &write_socket, NULL, &tv ) == -1 )
{
/* Fehler! */
if( errno != EINTR )
{
- Log( LOG_ALERT, "select(): %s!", strerror( errno ));
- Conn_Close( Idx, NULL );
- return FALSE;
+ 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;
+ else return true;
} /* Try_Write */
-LOCAL VOID Handle_Read( INT Sock )
+LOCAL void
+Handle_Read( int Sock )
{
- /* Aktivitaet auf einem Socket verarbeiten */
+ /* Aktivitaet auf einem Socket verarbeiten:
+ * - neue Clients annehmen,
+ * - Daten von Clients verarbeiten,
+ * - Resolver-Rueckmeldungen annehmen. */
CONN_ID idx;
- assert( Sock >= 0 );
+ assert( Sock > NONE );
- if( FD_ISSET( Sock, &My_Listener ))
+ 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 );
- Read_Request( idx );
+ if( idx > NONE ) Read_Request( idx );
}
} /* Handle_Read */
-LOCAL BOOLEAN Handle_Write( CONN_ID Idx )
+LOCAL bool
+Handle_Write( CONN_ID Idx )
{
- /* Daten aus Schreibpuffer versenden */
+ /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
+
+ int len, res, err;
+ socklen_t sock_len;
+ CLIENT *c;
- INT len;
+ 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;
+ }
+ Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", Idx, My_Connections[Idx].host, Conf_Server[Conf_GetServer( Idx )].port );
+
+ /* Send PASS and SERVER command to peer */
+ 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( Idx >= 0 );
- assert( My_Connections[Idx].sock >= 0 );
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_ALERT, "Write error (buffer) on connection %d: %s!", Idx, strerror( errno ));
- Conn_Close( Idx, NULL );
- 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 );
- return TRUE;
+ return true;
} /* Handle_Write */
-LOCAL VOID New_Connection( INT Sock )
+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;
+ int new_sock, new_sock_len;
+ RES_STAT *s;
CONN_ID idx;
+ CLIENT *c;
+ POINTER *ptr;
+ long new_size, cnt;
- assert( Sock >= 0 );
+ 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 )
return;
}
- /* Freie Connection-Struktur suschen */
- for( idx = 0; idx < MAX_CONNECTIONS; idx++ ) if( My_Connections[idx].sock < 0 ) break;
- if( idx >= MAX_CONNECTIONS )
+#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;
+ }
+#endif
+
+ /* Socket initialisieren */
+ Init_Socket( new_sock );
+
+ /* Check IP-based connection limit */
+ cnt = Count_Connections( new_addr );
+ if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
{
- Log( LOG_ALERT, "Can't accept connection: limit reached (%d)!", MAX_CONNECTIONS );
+ /* 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;
}
+ /* 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;
+ }
+
+ 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;
+ }
+
+#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 */
- if( ! Client_New_Local( idx, inet_ntoa( new_addr.sin_addr )))
+ 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;
- My_Connections[idx].rdatalen = 0;
- My_Connections[idx].wdatalen = 0;
/* 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 );
- if( new_sock > My_Max_Fd ) My_Max_Fd = new_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 );
+#ifdef IDENTAUTH
+ s = Resolve_Addr( &new_addr, My_Connections[idx].sock );
+#else
+ s = Resolve_Addr( &new_addr );
+#endif
+ if( s )
+ {
+ /* Sub-Prozess wurde asyncron gestartet */
+ My_Connections[idx].res_stat = s;
+ }
- Log( LOG_NOTICE, "Accepted connection %d from %s:%d on socket %d.", idx, inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock );
+ /* Penalty-Zeit setzen */
+ Conn_SetPenalty( idx, 4 );
} /* New_Connection */
-LOCAL CONN_ID Socket2Index( INT Sock )
+LOCAL CONN_ID
+Socket2Index( int Sock )
{
/* zum Socket passende Connection suchen */
CONN_ID idx;
- assert( Sock >= 0 );
+ assert( Sock > NONE );
- for( idx = 0; idx < MAX_CONNECTIONS; idx++ ) if( My_Connections[idx].sock == Sock ) break;
+ for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
- assert( idx < MAX_CONNECTIONS );
- return idx;
+ 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 )
+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;
+ int len, bsize;
+#ifdef ZLIB
+ CLIENT *c;
+#endif
+
+ assert( Idx > NONE );
+ assert( My_Connections[Idx].sock > NONE );
- assert( Idx >= 0 );
- assert( My_Connections[Idx].sock >= 0 );
+ /* 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
- len = recv( My_Connections[Idx].sock, My_Connections[Idx].rbuf + My_Connections[Idx].rdatalen, READBUFFER_LEN - My_Connections[Idx].rdatalen, 0 );
- My_Connections[Idx].rbuf[READBUFFER_LEN] = '\0';
+#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, "Receive buffer overflow (connection %d): %d bytes!", Idx, My_Connections[Idx].rdatalen );
+ Conn_Close( Idx, "Receive 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 is closing the connection ...", inet_ntoa( My_Connections[Idx].addr.sin_addr ), ntohs( My_Connections[Idx].addr.sin_port));
- Conn_Close( Idx, NULL );
+ 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_ALERT, "Read error on connection %d: %s!", Idx, strerror( errno ));
- Conn_Close( Idx, "Read error!" );
+ 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 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). */
+
+#ifndef STRICT_RFC
+ char *ptr1, *ptr2;
+#endif
+ char *ptr;
+ int len, delta;
+ bool action, result;
+#ifdef ZLIB
+ bool 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 receive 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 /* DEBUG */
+ }
+#endif /* ZLIB */
+ }
+
+ 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;
}
- My_Connections[Idx].rdatalen += len;
- assert( My_Connections[Idx].rdatalen <= READBUFFER_LEN );
- My_Connections[Idx].rbuf[My_Connections[Idx].rdatalen] = '\0';
+ 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 );
- if( My_Connections[Idx].rdatalen > MAX_CMDLEN )
+#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
{
- /* 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_ALERT, "Request too long (connection %d)!", Idx );
- Conn_Close( Idx, "Request too long!" );
+ /* 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;
}
- Handle_Buffer( Idx );
-} /* Read_Request */
+ 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 );
-LOCAL VOID Handle_Buffer( CONN_ID Idx )
+ /* 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 )
{
- CHAR *ptr, *ptr1, *ptr2;
- INT len, delta;
-
- /* Eine komplette Anfrage muss mit CR+LF enden, vgl.
- * RFC 2812. Haben wir eine? */
- ptr = strstr( My_Connections[Idx].rbuf, "\r\n" );
+ time_t now = time( NULL );
+ /* Connection-Struktur initialisieren */
- if( ptr ) delta = 2;
- else
+ memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
+ My_Connections[Idx].sock = NONE;
+ My_Connections[Idx].starttime = now;
+ My_Connections[Idx].lastdata = now;
+ My_Connections[Idx].lastprivmsg = now;
+} /* Init_Conn_Struct */
+
+
+LOCAL bool
+Init_Socket( int Sock )
+{
+ /* Initialize socket (set options) */
+
+ int value;
+
+#ifdef O_NONBLOCK /* unknown on A/UX */
+ if( fcntl( Sock, F_SETFL, O_NONBLOCK ) != 0 )
+ {
+ Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
+ close( Sock );
+ return false;
+ }
+#endif
+
+ /* Don't block this port after socket shutdown */
+ value = 1;
+ if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
{
- /* 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;
+ Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
+ /* ignore this error */
}
- if( ptr )
+ /* 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_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
+ {
+ Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
+ /* ignore this error */
+ }
+#endif
+
+ return true;
+} /* Init_Socket */
+
+
+LOCAL void
+Read_Resolver_Result( int r_fd )
+{
+ /* Read result of resolver sub-process from pipe and update the
+ * apropriate connection/client structure(s): hostname and/or
+ * IDENT user name.*/
+
+ CLIENT *c;
+ int len, i, n;
+ RES_STAT *s;
+ char *ptr;
+
+ /* Search associated connection ... */
+ for( i = 0; i < Pool_Size; i++ )
+ {
+ 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 )
+ {
+ /* Ops, none found? Probably the connection has already
+ * been closed!? We'll ignore that ... */
+ FD_CLR( r_fd, &Resolver_FDs );
+ close( r_fd );
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Resolver: Got result for unknown connection!?" );
+#endif
+ return;
+ }
+
+ /* Get resolver structure */
+ s = My_Connections[i].res_stat;
+ assert( s != NULL );
+
+ /* Read result from pipe */
+ len = read( r_fd, s->buffer + s->bufpos, sizeof( s->buffer ) - s->bufpos - 1 );
+ if( len < 0 )
+ {
+ /* Error! */
+ close( r_fd );
+ Log( LOG_CRIT, "Resolver: Can't read result: %s!", strerror( errno ));
+ return;
+ }
+ s->bufpos += len;
+ s->buffer[s->bufpos] = '\0';
+
+ /* If the result string is incomplete, return to main loop and
+ * wait until we can read in more bytes. */
+#ifdef IDENTAUTH
+try_resolve:
+#endif
+ ptr = strchr( s->buffer, '\n' );
+ if( ! ptr ) return;
+ *ptr = '\0';
+
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%d bytes), stage %d.", s->buffer, 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 conneciions.*/
+ if( My_Connections[i].sock > NONE )
{
- /* Ende der Anfrage wurde gefunden */
- *ptr = '\0';
- len = ( ptr - My_Connections[Idx].rbuf ) + delta;
- if( len > delta )
+ /* Incoming connection */
+
+ /* Search client ... */
+ c = Client_GetFromConn( i );
+ assert( c != NULL );
+
+ /* Only update client information of unregistered clients */
+ if( Client_Type( c ) == CLIENT_UNKNOWN )
{
- /* Es wurde ein Request gelesen */
- if( ! Parse_Request( Idx, My_Connections[Idx].rbuf )) return;
+ if( s->stage == 0 )
+ {
+ /* host name */
+ strlcpy( My_Connections[i].host, s->buffer, sizeof( My_Connections[i].host ));
+ Client_SetHostname( c, s->buffer );
+
+#ifdef IDENTAUTH
+ /* clean up buffer for IDENT result */
+ len = strlen( s->buffer ) + 1;
+ memmove( s->buffer, s->buffer + len, sizeof( s->buffer ) - len );
+ s->bufpos -= len;
+
+ /* Don't close pipe and clean up, but
+ * instead wait for IDENT result */
+ s->stage = 1;
+ goto try_resolve;
+ }
+ else if( s->stage == 1 )
+ {
+ /* IDENT user name */
+ if( s->buffer[0] )
+ {
+ Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, s->buffer );
+ Client_SetUser( c, s->buffer, true );
+ }
+ else Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
+#endif
+ }
+ else Log( LOG_ERR, "Resolver: got result for unknown stage %d!?", s->stage );
}
- else Log( LOG_DEBUG, "Got null-request (connection %d).", Idx );
+#ifdef DEBUG
+ else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
+#endif
+ }
+ else
+ {
+ /* Outgoing connection (server link): set the IP address
+ * so that we can connect to it in the main loop. */
+
+ /* Search server ... */
+ n = Conf_GetServer( i );
+ assert( n > NONE );
- /* Puffer anpassen */
- My_Connections[Idx].rdatalen -= len;
- memmove( My_Connections[Idx].rbuf, My_Connections[Idx].rbuf + len, My_Connections[Idx].rdatalen );
+ strlcpy( Conf_Server[n].ip, s->buffer, sizeof( Conf_Server[n].ip ));
}
-} /* Handle_Buffer */
+
+ /* Clean up ... */
+ FD_CLR( r_fd, &Resolver_FDs );
+ 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;
+
+ /* Reset penalty time */
+ 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- */