/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2004 Alexander Barton <alex@barton.de>
*
* 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
#include "portab.h"
-static char UNUSED id[] = "$Id: conn.c,v 1.117 2003/02/23 12:04:05 alex Exp $";
+static char UNUSED id[] = "$Id: conn.c,v 1.144 2005/03/19 18:43:48 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 <time.h>
#include <netinet/in.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
+# 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 "tool.h"
#ifdef RENDEZVOUS
-#include "rendezvous.h"
+# include "rendezvous.h"
#endif
#include "exp.h"
#define SERVER_WAIT (NONE - 1)
-LOCAL VOID Handle_Read PARAMS(( INT sock ));
-LOCAL BOOLEAN Handle_Write PARAMS(( CONN_ID Idx ));
-LOCAL VOID New_Connection PARAMS(( INT Sock ));
-LOCAL CONN_ID Socket2Index PARAMS(( INT Sock ));
-LOCAL VOID Read_Request PARAMS(( CONN_ID Idx ));
-LOCAL BOOLEAN Try_Write PARAMS(( CONN_ID Idx ));
-LOCAL BOOLEAN Handle_Buffer PARAMS(( CONN_ID Idx ));
-LOCAL VOID Check_Connections PARAMS(( VOID ));
-LOCAL VOID Check_Servers PARAMS(( VOID ));
-LOCAL VOID Init_Conn_Struct PARAMS(( CONN_ID Idx ));
-LOCAL BOOLEAN Init_Socket PARAMS(( INT Sock ));
-LOCAL VOID New_Server PARAMS(( INT Server, CONN_ID Idx ));
-LOCAL VOID Read_Resolver_Result PARAMS(( INT r_fd ));
+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_Listeners;
LOCAL fd_set My_Sockets;
LOCAL fd_set My_Connects;
+#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". */
/* konfiguriertes Limit beachten */
if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
}
- My_Connections = malloc( sizeof( CONNECTION ) * Pool_Size );
+ My_Connections = (CONNECTION *)malloc( sizeof( CONNECTION ) * Pool_Size );
if( ! My_Connections )
{
/* Speicher konnte nicht alloziert werden! */
Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
exit( 1 );
}
- Log( LOG_DEBUG, "Allocted connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
+#endif
/* zu Beginn haben wir keine Verbindungen */
FD_ZERO( &My_Listeners );
} /* 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 < Conn_MaxFD + 1; i++ )
{
if( FD_ISSET( i, &My_Listeners ))
{
close( 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 );
+ if( NGIRCd_SignalRestart ) Conn_Close( idx, NULL, "Server going down (restarting)", true );
+ else Conn_Close( idx, NULL, "Server going down", true );
}
else
{
}
}
}
-
+
free( My_Connections );
My_Connections = NULL;
Pool_Size = 0;
} /* Conn_Exit */
-GLOBAL INT
-Conn_InitListeners( VOID )
+GLOBAL int
+Conn_InitListeners( void )
{
/* Initialize ports on which the server should accept connections */
- INT created, i;
+ int created, i;
created = 0;
for( i = 0; i < Conf_ListenPorts_Count; i++ )
} /* Conn_InitListeners */
-GLOBAL VOID
-Conn_ExitListeners( VOID )
+GLOBAL void
+Conn_ExitListeners( void )
{
/* Close down all listening sockets */
- INT i;
+ 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 BOOLEAN
-Conn_NewListener( CONST UINT Port )
+GLOBAL bool
+Conn_NewListener( const UINT16 Port )
{
/* Create new listening socket on specified port */
struct sockaddr_in addr;
- INT sock;
+ struct in_addr inaddr;
+ int sock;
#ifdef RENDEZVOUS
- CHAR name[CLIENT_ID_LEN], *info;
+ 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_CRIT, "Can't create socket: %s!", strerror( errno ));
- return FALSE;
+ return false;
}
- if( ! Init_Socket( sock )) return FALSE;
+ if( ! Init_Socket( sock )) return false;
/* an Port binden */
if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 )
{
Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
close( sock );
- return FALSE;
+ return false;
}
/* in "listen mode" gehen :-) */
{
Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno ));
close( sock );
- return FALSE;
+ return false;
}
/* Neuen Listener in Strukturen einfuegen */
if( sock > Conn_MaxFD ) Conn_MaxFD = sock;
- Log( LOG_INFO, "Now listening on port %d (socket %d).", Port, 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 */
Rendezvous_Register( name, RENDEZVOUS_TYPE, Port );
#endif
- return TRUE;
+ return true;
} /* Conn_NewListener */
-GLOBAL VOID
-Conn_Handler( VOID )
+GLOBAL void
+Conn_Handler( void )
{
/* "Hauptschleife": Aktive Verbindungen ueberwachen. Folgende Aktionen
* werden dabei durchgefuehrt, bis der Server terminieren oder neu
struct timeval tv;
time_t start, t;
CONN_ID i, idx;
- BOOLEAN timeout;
+ bool timeout;
start = time( NULL );
while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart ))
{
- timeout = TRUE;
+ timeout = true;
#ifdef RENDEZVOUS
Rendezvous_Handler( );
Check_Servers( );
Check_Connections( );
+ t = time( NULL );
+
/* noch volle Lese-Buffer suchen */
for( i = 0; i < Pool_Size; i++ )
{
- if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 ))
+ if(( My_Connections[i].sock > NONE ) && ( 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;
+ if( Handle_Buffer( i )) timeout = false;
}
}
FD_ZERO( &write_sockets );
for( i = 0; i < Pool_Size; i++ )
{
-#ifdef USE_ZLIB
+#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 ))
}
/* von welchen Sockets koennte gelesen werden? */
- t = time( NULL );
read_sockets = My_Sockets;
for( i = 0; i < Pool_Size; i++ )
{
/* Timeout initialisieren */
tv.tv_usec = 0;
- if( timeout ) tv.tv_sec = TIME_RES;
+ if( timeout ) tv.tv_sec = 1;
else tv.tv_sec = 0;
-
+
/* Auf Aktivitaet warten */
i = select( Conn_MaxFD + 1, &read_sockets, &write_sockets, NULL, &tv );
if( i == 0 )
if( errno != EINTR )
{
Log( LOG_EMERG, "Conn_Handler(): select(): %s!", strerror( errno ));
- Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE );
+ Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
exit( 1 );
}
continue;
/* Es kann geschrieben werden ... */
idx = Socket2Index( i );
if( idx == NONE ) continue;
-
+
if( ! Handle_Write( idx ))
{
/* Fehler beim Schreiben! Diesen Socket nun
#ifdef PROTOTYPES
-GLOBAL BOOLEAN
-Conn_WriteStr( CONN_ID Idx, CHAR *Format, ... )
+GLOBAL bool
+Conn_WriteStr( CONN_ID Idx, char *Format, ... )
#else
-GLOBAL BOOLEAN
+GLOBAL bool
Conn_WriteStr( Idx, Format, va_alist )
CONN_ID Idx;
-CHAR *Format;
+char *Format;
va_dcl
#endif
{
/* String in Socket schreiben. CR+LF wird von dieser Funktion
* automatisch angehaengt. Im Fehlerfall wird dir Verbindung
- * getrennt und FALSE geliefert. */
+ * getrennt und false geliefert. */
- CHAR buffer[COMMAND_LEN];
- BOOLEAN ok;
+ char buffer[COMMAND_LEN];
+ bool ok;
va_list ap;
assert( Idx > NONE );
#else
va_start( ap );
#endif
- if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) == COMMAND_LEN - 2 )
+ if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 )
{
Log( LOG_CRIT, "Text too long to send (connection %d)!", Idx );
- Conn_Close( Idx, "Text too long to send!", NULL, FALSE );
- return FALSE;
+ Conn_Close( Idx, "Text too long to send!", NULL, false );
+ return false;
}
#ifdef SNIFFER
} /* 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 > NONE );
assert( Data != NULL );
* In diesem Fall wird hier einfach ein Fehler geliefert. */
if( My_Connections[Idx].sock <= NONE )
{
+#ifdef DEBUG
Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
- return FALSE;
+#endif
+ return false;
}
/* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
{
/* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
* zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
- if( ! Try_Write( Idx )) return FALSE;
+ if( ! 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;
+ Conn_Close( Idx, "Write buffer overflow!", NULL, false );
+ return false;
}
}
-#ifdef USE_ZLIB
+#ifdef ZLIB
if( My_Connections[Idx].options & CONN_ZIP )
{
/* Daten komprimieren und in Puffer kopieren */
- if( ! Zip_Buffer( Idx, Data, Len )) return FALSE;
+ if( ! Zip_Buffer( Idx, Data, Len )) return false;
}
else
#endif
/* Adjust global write counter */
WCounter += Len;
- return TRUE;
+ return true;
} /* Conn_Write */
-GLOBAL VOID
-Conn_Close( CONN_ID Idx, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN InformClient )
+GLOBAL void
+Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
{
/* Close connection. Open pipes of asyncronous resolver
* sub-processes are closed down. */
CLIENT *c;
- DOUBLE in_k, out_k;
-#ifdef USE_ZLIB
- DOUBLE in_z_k, out_z_k;
- INT in_p, out_p;
+ char *txt;
+ double in_k, out_k;
+#ifdef ZLIB
+ double in_z_k, out_z_k;
+ int in_p, out_p;
#endif
assert( Idx > NONE );
- assert( My_Connections[Idx].sock > NONE );
/* 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. */
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
+#endif
return;
}
+ 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 );
/* 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 );
+ 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 );
+ (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 );
+ Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
exit( 1 );
}
My_Connections[Idx].sock = NONE;
/* If there is still a client, unregister it now */
- if( c ) Client_Destroy( c, LogMsg, FwdMsg, TRUE );
+ 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 USE_ZLIB
+ 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 );
+ 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
/* Servers: Modify time of next connect attempt? */
Conf_UnsetServer( Idx );
-#ifdef USE_ZLIB
+#ifdef ZLIB
/* Clean up zlib, if link was compressed */
if( Conn_Options( Idx ) & CONN_ZIP )
{
/* 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
+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 bool
Try_Write( CONN_ID Idx )
{
/* Versuchen, Daten aus dem Schreib-Puffer in den Socket zu
- * schreiben. TRUE wird geliefert, wenn entweder keine Daten
+ * schreiben. true wird geliefert, wenn entweder keine Daten
* zum Versenden vorhanden sind oder erfolgreich bearbeitet
- * werden konnten. Im Fehlerfall wird FALSE geliefert und
+ * werden konnten. Im Fehlerfall wird false geliefert und
* die Verbindung geschlossen. */
fd_set write_socket;
assert( My_Connections[Idx].sock > NONE );
/* sind ueberhaupt Daten vorhanden? */
-#ifdef USE_ZLIB
- if(( ! My_Connections[Idx].wdatalen > 0 ) && ( ! My_Connections[Idx].zip.wdatalen )) return TRUE;
+#ifdef ZLIB
+ if(( ! My_Connections[Idx].wdatalen > 0 ) && ( ! My_Connections[Idx].zip.wdatalen )) return true;
#else
- if( ! My_Connections[Idx].wdatalen > 0 ) return TRUE;
+ if( ! My_Connections[Idx].wdatalen > 0 ) return true;
#endif
/* Timeout initialisieren: 0 Sekunden, also nicht blockieren */
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;
+ 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:
* - neue Clients annehmen,
} /* Handle_Read */
-LOCAL BOOLEAN
+LOCAL bool
Handle_Write( CONN_ID Idx )
{
/* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
- INT len, res, err;
+ int len, res, err;
+ socklen_t sock_len;
CLIENT *c;
assert( Idx > NONE );
FD_CLR( My_Connections[Idx].sock, &My_Connects );
/* Ergebnis des connect() ermitteln */
- len = sizeof( err );
- res = getsockopt( My_Connections[Idx].sock, SOL_SOCKET, SO_ERROR, &err, &len );
- assert( len == sizeof( err ));
+ 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 ))
Conf_Server[Conf_GetServer( Idx )].lasttry = time( NULL );
Conf_UnsetServer( Idx );
- return FALSE;
+ return false;
}
- 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 );
+ Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", Idx, My_Connections[Idx].host, Conf_Server[Conf_GetServer( Idx )].port );
- /* PASS und SERVER verschicken */
+ /* 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 USE_ZLIB
+#ifdef ZLIB
/* Schreibpuffer leer, aber noch Daten im Kompressionsbuffer?
* Dann muss dieser nun geflushed werden! */
if( My_Connections[Idx].wdatalen == 0 ) Zip_Flush( Idx );
if( len < 0 )
{
/* Operation haette Socket "nur" blockiert ... */
- if( errno == EAGAIN ) return TRUE;
+ 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;
+ 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;
+ long new_size, cnt;
assert( Sock > NONE );
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 );
+ 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 ))
+ {
+ /* 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 */
{
/* 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 < 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 );
+
+ ptr = (POINTER *)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]" );
- close( new_sock );
- return;
- }
-
- /* Struktur umkopieren ... */
- memcpy( ptr, My_Connections, sizeof( CONNECTION ) * Pool_Size );
-
- Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [malloc()/memcpy()]", new_size, sizeof( CONNECTION ) * new_size );
+ Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
+ Simple_Message( new_sock, "ERROR: Internal error" );
+ close( new_sock );
+ return;
}
- else Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
-
+
+#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 = ptr;
-
+ My_Connections = (CONNECTION *)ptr;
+
/* Initialize new items */
for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
idx = Pool_Size;
-
+
/* Adjust new pool size */
Pool_Size = new_size;
}
/* Client-Struktur initialisieren */
- c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, FALSE );
+ 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;
}
/* 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;
}
-
+
/* Penalty-Zeit setzen */
Conn_SetPenalty( idx, 4 );
} /* New_Connection */
LOCAL CONN_ID
-Socket2Index( INT Sock )
+Socket2Index( int Sock )
{
/* zum Socket passende Connection suchen */
{
/* 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
+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 USE_ZLIB
+ int len, bsize;
+#ifdef ZLIB
CLIENT *c;
#endif
/* wenn noch nicht registriert: maximal mit ZREADBUFFER_LEN arbeiten,
* ansonsten koennen Daten ggf. nicht umkopiert werden. */
bsize = READBUFFER_LEN;
-#ifdef USE_ZLIB
+#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 USE_ZLIB
+#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 );
+ 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 USE_ZLIB
+#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 );
{
/* 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 );
+ Conn_Close( Idx, "Socket closed!", "Client closed connection", false );
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 );
+ Conn_Close( Idx, "Read error!", "Client closed connection", false );
return;
}
} /* Read_Request */
-LOCAL BOOLEAN
+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). */
+ * Wurde ein Request verarbeitet, so wird true geliefert,
+ * ansonsten false (auch bei Fehlern). */
#ifndef STRICT_RFC
- CHAR *ptr1, *ptr2;
+ char *ptr1, *ptr2;
#endif
- CHAR *ptr;
- INT len, delta;
- BOOLEAN action, result;
-#ifdef USE_ZLIB
- BOOLEAN old_z;
+ char *ptr;
+ int len, delta;
+ bool action, result;
+#ifdef ZLIB
+ bool old_z;
#endif
- result = FALSE;
+ result = false;
do
{
-#ifdef USE_ZLIB
+ /* 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;
+ 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
else if( ptr2 ) ptr = ptr2;
}
#endif
-
- action = FALSE;
+
+ action = false;
if( ptr )
{
/* Ende der Anfrage wurde gefunden */
* (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;
+ Conn_Close( Idx, NULL, "Request too long", true );
+ return false;
}
-#ifdef USE_ZLIB
+#ifdef ZLIB
/* merken, ob Stream bereits komprimiert wird */
old_z = My_Connections[Idx].options & CONN_ZIP;
#endif
{
/* Es wurde ein Request gelesen */
My_Connections[Idx].msg_in++;
- if( ! Parse_Request( Idx, My_Connections[Idx].rbuf )) return FALSE;
- else action = TRUE;
+ 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 USE_ZLIB
+#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 )
{
- if( My_Connections[Idx].rdatalen > ZREADBUFFER_LEN )
- {
- /* Hupsa! Soviel Platz haben wir aber gar nicht! */
- Log( LOG_ALERT, "Can't move read buffer: No space left in unzip buffer (need %d bytes)!", My_Connections[Idx].rdatalen );
- return FALSE;
- }
- memcpy( My_Connections[Idx].zip.rbuf, My_Connections[Idx].rbuf, My_Connections[Idx].rdatalen );
- My_Connections[Idx].zip.rdatalen = My_Connections[Idx].rdatalen;
- My_Connections[Idx].rdatalen = 0;
- Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", My_Connections[Idx].zip.rdatalen );
+ /* 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
+#endif /* ZLIB */
}
-
- if( action ) result = TRUE;
+
+ if( action ) result = true;
} while( action );
-
+
return result;
} /* Handle_Buffer */
-LOCAL VOID
-Check_Connections( VOID )
+LOCAL void
+Check_Connections( void )
{
/* Pruefen, ob Verbindungen noch "alive" sind. Ist dies
* nicht der Fall, zunaechst PING-PONG spielen und, wenn
if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout )
{
/* Timeout */
+#ifdef DEBUG
Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
- Conn_Close( i, NULL, "Ping timeout", TRUE );
+#endif
+ Conn_Close( i, NULL, "Ping timeout", true );
}
}
else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
{
/* es muss ein PING gesendet werden */
+#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( )));
}
if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
{
/* Timeout */
+#ifdef DEBUG
Log( LOG_DEBUG, "Connection %d timed out ...", i );
- Conn_Close( i, NULL, "Timeout", FALSE );
+#endif
+ Conn_Close( i, NULL, "Timeout", false );
}
}
}
} /* Check_Connections */
-LOCAL VOID
-Check_Servers( VOID )
+LOCAL void
+Check_Servers( void )
{
/* Check if we can establish further server links */
RES_STAT *s;
CONN_ID idx;
- INT i, n;
+ int i, n;
/* Serach all connections, are there results from the resolver? */
for( idx = 0; idx < Pool_Size; idx++ )
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 );
} /* Check_Servers */
-LOCAL VOID
-New_Server( INT Server, CONN_ID Idx )
+LOCAL void
+New_Server( int Server, CONN_ID Idx )
{
- /* Neue Server-Verbindung aufbauen */
+ /* Establish new server link */
struct sockaddr_in new_addr;
struct in_addr inaddr;
- INT res, new_sock;
+ int res, new_sock;
CLIENT *c;
assert( Server > NONE );
assert( Idx > NONE );
- /* Wurde eine gueltige IP-Adresse gefunden? */
+ /* Did we get a valid IP address? */
if( ! Conf_Server[Server].ip[0] )
{
- /* Nein. Verbindung wieder freigeben: */
+ /* 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;
}
if( inaddr.s_addr == (unsigned)-1 )
#endif
{
- /* Konnte Adresse nicht konvertieren */
+ /* 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;
}
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;
}
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 );
+ 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 );
- /* Verbindung registrieren */
+ /* 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 ));
- /* Neuen Socket registrieren */
+ /* 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
+LOCAL void
Init_Conn_Struct( CONN_ID Idx )
{
/* Connection-Struktur initialisieren */
My_Connections[Idx].flag = 0;
My_Connections[Idx].options = 0;
-#ifdef USE_ZLIB
+#ifdef ZLIB
My_Connections[Idx].zip.rbuf[0] = '\0';
My_Connections[Idx].zip.rdatalen = 0;
My_Connections[Idx].zip.wbuf[0] = '\0';
} /* Init_Conn_Struct */
-LOCAL BOOLEAN
-Init_Socket( INT Sock )
+LOCAL bool
+Init_Socket( int Sock )
{
- /* Socket-Optionen setzen */
+ /* Initialize socket (set options) */
- INT on = 1;
+ int value;
-#ifdef O_NONBLOCK /* A/UX kennt das nicht? */
+#ifdef O_NONBLOCK /* unknown on A/UX */
if( fcntl( Sock, F_SETFL, O_NONBLOCK ) != 0 )
{
- Log( LOG_CRIT, "Can't enable non-blocking mode: %s!", strerror( errno ));
+ Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
close( Sock );
- return FALSE;
+ 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 )
+ {
+ Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
+ /* ignore this error */
}
+
+ /* Set type of service (TOS) */
+#if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
+ value = IPTOS_LOWDELAY;
+#ifdef DEBUG
+ Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
#endif
- if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &on, (socklen_t)sizeof( on )) != 0)
+ if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
{
- Log( LOG_ERR, "Can't set socket options: %s!", strerror( errno ));
- /* dieser Fehler kann ignoriert werden. */
+ Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
+ /* ignore this error */
}
+#endif
- return TRUE;
+ return true;
} /* Init_Socket */
-LOCAL VOID
-Read_Resolver_Result( INT r_fd )
+LOCAL void
+Read_Resolver_Result( int r_fd )
{
- /* Ergebnis von Resolver Sub-Prozess aus Pipe lesen
- * und entsprechende Connection aktualisieren */
+ /* Read result of resolver sub-process from pipe and update the
+ * apropriate connection/client structure(s): hostname and/or
+ * IDENT user name.*/
- CHAR result[HOST_LEN];
CLIENT *c;
- INT len, i, 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';
+ int len, i, n;
+ RES_STAT *s;
+ char *ptr;
- /* zugehoerige Connection suchen */
+ /* Search associated connection ... */
for( i = 0; i < Pool_Size; i++ )
{
- if(( My_Connections[i].sock != NONE ) && ( My_Connections[i].res_stat ) && ( My_Connections[i].res_stat->pipe[0] == r_fd )) break;
+ if(( My_Connections[i].sock != NONE )
+ && ( My_Connections[i].res_stat != NULL )
+ && ( My_Connections[i].res_stat->pipe[0] == r_fd ))
+ break;
}
if( i >= Pool_Size )
{
- /* Opsa! Keine passende Connection gefunden!? Vermutlich
- * wurde sie schon wieder geschlossen. */
+ /* 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;
}
- Log( LOG_DEBUG, "Resolver: %s is \"%s\".", My_Connections[i].host, result );
-
- /* Aufraeumen */
- close( My_Connections[i].res_stat->pipe[0] );
- close( My_Connections[i].res_stat->pipe[1] );
- free( My_Connections[i].res_stat );
- My_Connections[i].res_stat = NULL;
+ /* Get resolver structure */
+ s = My_Connections[i].res_stat;
+ assert( s != NULL );
+
+ /* Read result from pipe */
+ 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 )
{
- /* Eingehende Verbindung: Hostnamen setzen */
+ /* Incoming connection */
+
+ /* Search client ... */
c = Client_GetFromConn( i );
assert( c != NULL );
- strlcpy( My_Connections[i].host, result, sizeof( My_Connections[i].host ));
- Client_SetHostname( c, result );
+
+ /* Only update client information of unregistered clients */
+ if( Client_Type( c ) == CLIENT_UNKNOWN )
+ {
+ 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 );
+ }
+#ifdef DEBUG
+ else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
+#endif
}
else
{
- /* Ausgehende Verbindung (=Server): IP setzen */
+ /* 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 );
- 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!?" );
+ assert( n > NONE );
+
+ strlcpy( Conf_Server[n].ip, s->buffer, sizeof( Conf_Server[n].ip ));
}
- /* Penalty-Zeit zurueck setzen */
+ /* 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- */
projects / ngircd-alex.git / blobdiff