mirror of
https://github.com/osmarks/ngircd.git
synced 2025-01-05 13:20:29 +00:00
Fixed and enhanced penalty handling; changed internal time resoluiton of
the server to one second. Code cleanup.
This commit is contained in:
Alexander Barton
parent
2981fe9eb7
commit
7b6e26628a
@ -12,6 +12,9 @@
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ngIRCd CVS-HEAD
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- Fixed and enhanced the "penalty handling" of the server: commands that
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require more resources block the client for a short time.
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- Changed the internal time resolution to one second.
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- New configuration variable "MaxConnectionsIP" to limit the number of
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simultaneous connections from a single IP that the server will accept.
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This configuration options lowers the risk of denial of service attacks
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@ -472,4 +475,4 @@ ngIRCd 0.0.1, 31.12.2001
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--
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$Id: ChangeLog,v 1.214 2003/11/05 21:41:01 alex Exp $
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$Id: ChangeLog,v 1.215 2003/11/05 23:24:48 alex Exp $
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@ -16,10 +16,11 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: conn-func.c,v 1.1 2002/12/30 17:14:28 alex Exp $";
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static char UNUSED id[] = "$Id: conn-func.c,v 1.2 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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#include <log.h>
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#include "conn.h"
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@ -69,7 +70,7 @@ Conn_SetPenalty( CONN_ID Idx, time_t Seconds )
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assert( Idx > NONE );
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assert( Seconds >= 0 );
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t = time( NULL ) + Seconds;
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if( t > My_Connections[Idx].delaytime ) My_Connections[Idx].delaytime = t;
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} /* Conn_SetPenalty */
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@ -16,7 +16,7 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: conn.c,v 1.126 2003/11/05 21:41:02 alex Exp $";
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static char UNUSED id[] = "$Id: conn.c,v 1.127 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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@ -120,7 +120,9 @@ Conn_Init( VOID )
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Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
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exit( 1 );
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}
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#ifdef DEBUG
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Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
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#endif
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/* zu Beginn haben wir keine Verbindungen */
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FD_ZERO( &My_Listeners );
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@ -147,7 +149,9 @@ Conn_Exit( VOID )
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CONN_ID idx;
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INT i;
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#ifdef DEBUG
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Log( LOG_DEBUG, "Shutting down all connections ..." );
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#endif
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#ifdef RENDEZVOUS
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Rendezvous_UnregisterListeners( );
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@ -165,12 +169,16 @@ Conn_Exit( VOID )
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if( FD_ISSET( i, &My_Listeners ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Listening socket %d closed.", i );
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#endif
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}
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else if( FD_ISSET( i, &My_Connects ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Connection %d closed during creation (socket %d).", idx, i );
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#endif
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}
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else if( idx < Pool_Size )
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{
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@ -225,7 +233,9 @@ Conn_ExitListeners( VOID )
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if( FD_ISSET( i, &My_Sockets ) && FD_ISSET( i, &My_Listeners ))
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{
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close( i );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Listening socket %d closed.", i );
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#endif
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}
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}
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} /* Conn_ExitListeners */
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@ -368,10 +378,13 @@ Conn_Handler( VOID )
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Check_Servers( );
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Check_Connections( );
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t = time( NULL );
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/* noch volle Lese-Buffer suchen */
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for( i = 0; i < Pool_Size; i++ )
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{
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if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 ))
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if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 ) &&
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( My_Connections[i].delaytime < t ))
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{
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/* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
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if( Handle_Buffer( i )) timeout = FALSE;
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@ -400,7 +413,6 @@ Conn_Handler( VOID )
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}
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/* von welchen Sockets koennte gelesen werden? */
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t = time( NULL );
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read_sockets = My_Sockets;
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for( i = 0; i < Pool_Size; i++ )
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{
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@ -431,7 +443,7 @@ Conn_Handler( VOID )
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/* Timeout initialisieren */
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tv.tv_usec = 0;
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if( timeout ) tv.tv_sec = TIME_RES;
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if( timeout ) tv.tv_sec = 1;
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else tv.tv_sec = 0;
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/* Auf Aktivitaet warten */
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@ -545,7 +557,9 @@ Conn_Write( CONN_ID Idx, CHAR *Data, INT Len )
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* In diesem Fall wird hier einfach ein Fehler geliefert. */
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if( My_Connections[Idx].sock <= NONE )
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{
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#ifdef DEBUG
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Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
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#endif
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return FALSE;
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}
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@ -854,7 +868,9 @@ Handle_Write( CONN_ID Idx )
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return FALSE;
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}
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#ifdef DEBUG
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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 );
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#endif
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/* PASS und SERVER verschicken */
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Conn_WriteStr( Idx, "PASS %s %s", Conf_Server[Conf_GetServer( Idx )].pwd_out, NGIRCd_ProtoID );
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@ -995,9 +1011,13 @@ New_Connection( INT Sock )
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/* Struktur umkopieren ... */
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memcpy( ptr, My_Connections, sizeof( CONNECTION ) * Pool_Size );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [malloc()/memcpy()]", new_size, sizeof( CONNECTION ) * new_size );
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#endif
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}
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#ifdef DEBUG
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else Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
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#endif
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/* Adjust pointer to new block */
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My_Connections = ptr;
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@ -1061,7 +1081,9 @@ Socket2Index( INT Sock )
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{
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/* die Connection wurde vermutlich (wegen eines
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* Fehlers) bereits wieder abgebaut ... */
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#ifdef DEBUG
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Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
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#endif
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return NONE;
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}
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else return idx;
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@ -1164,6 +1186,9 @@ Handle_Buffer( CONN_ID Idx )
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result = FALSE;
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do
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{
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/* Check penalty */
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if( My_Connections[Idx].delaytime > time( NULL )) return result;
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#ifdef USE_ZLIB
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/* ggf. noch unkomprimiete Daten weiter entpacken */
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if( My_Connections[Idx].options & CONN_ZIP )
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@ -1243,7 +1268,9 @@ Handle_Buffer( CONN_ID Idx )
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memcpy( My_Connections[Idx].zip.rbuf, My_Connections[Idx].rbuf, My_Connections[Idx].rdatalen );
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My_Connections[Idx].zip.rdatalen = My_Connections[Idx].rdatalen;
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My_Connections[Idx].rdatalen = 0;
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#ifdef DEBUG
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Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", My_Connections[Idx].zip.rdatalen );
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#endif
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}
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}
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#endif
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@ -1280,14 +1307,18 @@ Check_Connections( VOID )
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if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout )
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{
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/* Timeout */
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#ifdef DEBUG
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Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
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#endif
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Conn_Close( i, NULL, "Ping timeout", TRUE );
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}
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}
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else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
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{
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/* es muss ein PING gesendet werden */
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#ifdef DEBUG
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Log( LOG_DEBUG, "Connection %d: sending PING ...", i );
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#endif
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My_Connections[i].lastping = time( NULL );
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Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( )));
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}
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@ -1298,7 +1329,9 @@ Check_Connections( VOID )
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if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
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{
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/* Timeout */
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#ifdef DEBUG
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Log( LOG_DEBUG, "Connection %d timed out ...", i );
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#endif
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Conn_Close( i, NULL, "Timeout", FALSE );
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}
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}
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@ -1354,7 +1387,9 @@ Check_Servers( VOID )
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Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!", Pool_Size );
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return;
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}
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#ifdef DEBUG
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Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
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#endif
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/* Verbindungs-Struktur initialisieren */
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Init_Conn_Struct( idx );
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@ -1466,7 +1501,9 @@ New_Server( INT Server, CONN_ID Idx )
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FD_SET( new_sock, &My_Connects );
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if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock;
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#ifdef DEBUG
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Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
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#endif
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} /* New_Server */
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@ -1563,11 +1600,15 @@ Read_Resolver_Result( INT r_fd )
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/* Opsa! Keine passende Connection gefunden!? Vermutlich
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* wurde sie schon wieder geschlossen. */
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close( r_fd );
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#ifdef DEBUG
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Log( LOG_DEBUG, "Resolver: Got result for unknown connection!?" );
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#endif
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return;
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}
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#ifdef DEBUG
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Log( LOG_DEBUG, "Resolver: %s is \"%s\".", My_Connections[i].host, result );
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#endif
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/* Aufraeumen */
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close( My_Connections[i].res_stat->pipe[0] );
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@ -8,7 +8,7 @@
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* (at your option) any later version.
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* Please read the file COPYING, README and AUTHORS for more information.
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*
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* $Id: defines.h,v 1.42 2003/02/23 12:03:39 alex Exp $
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* $Id: defines.h,v 1.43 2003/11/05 23:24:48 alex Exp $
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*
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* Global defines of ngIRCd.
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*/
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@ -19,8 +19,6 @@
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#define NONE -1
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#define TIME_RES 2 /* Zeit-Aufloesung des Servers in Sekunden */
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#define FNAME_LEN 256 /* max. Laenge eines Dateinamen */
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#define LINE_LEN 256 /* max. Laenge einer Konfigurationszeile */
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@ -14,7 +14,7 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: irc-info.c,v 1.17 2003/06/06 20:46:11 alex Exp $";
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static char UNUSED id[] = "$Id: irc-info.c,v 1.18 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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@ -77,6 +77,7 @@ IRC_ADMIN(CLIENT *Client, REQUEST *Req )
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if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
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if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
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IRC_SetPenalty( Client, 1 );
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return CONNECTED;
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} /* IRC_ADMIN */
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@ -161,7 +162,8 @@ IRC_LINKS( CLIENT *Client, REQUEST *Req )
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}
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c = Client_Next( c );
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}
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IRC_SetPenalty( target, 1 );
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return IRC_WriteStrClient( target, RPL_ENDOFLINKS_MSG, Client_ID( target ), mask );
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} /* IRC_LINKS */
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@ -197,6 +199,7 @@ IRC_LUSERS( CLIENT *Client, REQUEST *Req )
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IRC_Send_LUSERS( target );
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IRC_SetPenalty( target, 1 );
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return CONNECTED;
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} /* IRC_LUSERS */
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@ -230,6 +233,7 @@ IRC_MOTD( CLIENT *Client, REQUEST *Req )
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}
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}
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IRC_SetPenalty( from, 3 );
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return IRC_Show_MOTD( from );
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} /* IRC_MOTD */
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@ -324,6 +328,7 @@ IRC_NAMES( CLIENT *Client, REQUEST *Req )
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if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
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}
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IRC_SetPenalty( from, 1 );
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return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
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} /* IRC_NAMES */
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@ -402,6 +407,7 @@ IRC_STATS( CLIENT *Client, REQUEST *Req )
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break;
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}
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IRC_SetPenalty( from, 2 );
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return IRC_WriteStrClient( from, RPL_ENDOFSTATS_MSG, Client_ID( from ), query );
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} /* IRC_STATS */
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@ -517,6 +523,7 @@ IRC_VERSION( CLIENT *Client, REQUEST *Req )
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}
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/* mit Versionsinfo antworten */
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IRC_SetPenalty( Client, 1 );
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#ifdef CVSDATE
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strlcpy( ver, CVSDATE, sizeof( ver ));
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strncpy( ver + 4, ver + 5, 2 );
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@ -14,7 +14,7 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: irc-login.c,v 1.34 2003/03/31 15:54:21 alex Exp $";
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static char UNUSED id[] = "$Id: irc-login.c,v 1.35 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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@ -223,6 +223,7 @@ IRC_NICK( CLIENT *Client, REQUEST *Req )
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/* neuen Client-Nick speichern */
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Client_SetID( target, Req->argv[0] );
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IRC_SetPenalty( target, 2 );
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}
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return CONNECTED;
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@ -457,6 +458,9 @@ Hello_User( CLIENT *Client )
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if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
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if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
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/* Suspend the client for a second ... */
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IRC_SetPenalty( Client, 1 );
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return CONNECTED;
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} /* Hello_User */
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@ -14,7 +14,7 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: irc-mode.c,v 1.31 2003/01/21 21:04:16 alex Exp $";
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static char UNUSED id[] = "$Id: irc-mode.c,v 1.32 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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@ -230,7 +230,8 @@ client_exit:
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}
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Log( LOG_DEBUG, "User \"%s\": Mode change, now \"%s\".", Client_Mask( Target ), Client_Modes( Target ));
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}
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IRC_SetPenalty( Client, 1 );
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return ok;
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} /* Client_Mode */
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@ -598,6 +599,7 @@ chan_exit:
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}
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}
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IRC_SetPenalty( Client, 1 );
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return CONNECTED;
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} /* Channel_Mode */
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@ -14,7 +14,7 @@
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#include "portab.h"
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static char UNUSED id[] = "$Id: irc-write.c,v 1.14 2002/12/30 17:15:42 alex Exp $";
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static char UNUSED id[] = "$Id: irc-write.c,v 1.15 2003/11/05 23:24:48 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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@ -395,6 +395,21 @@ va_dcl
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} /* IRC_WriteStrRelatedPrefix */
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GLOBAL VOID
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IRC_SetPenalty( CLIENT *Client, INT Seconds )
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{
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CONN_ID c;
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assert( Client != NULL );
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assert( Seconds > 0 );
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if( Client_Type( Client ) == CLIENT_SERVER ) return;
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c = Client_Conn( Client );
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if( c > NONE ) Conn_SetPenalty( c, Seconds );
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} /* IRC_SetPenalty */
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LOCAL CHAR *
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Get_Prefix( CLIENT *Target, CLIENT *Client )
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{
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@ -8,7 +8,7 @@
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* (at your option) any later version.
|
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* Please read the file COPYING, README and AUTHORS for more information.
|
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*
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* $Id: irc-write.h,v 1.5 2002/12/12 12:23:43 alex Exp $
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* $Id: irc-write.h,v 1.6 2003/11/05 23:24:48 alex Exp $
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*
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* Sending IRC commands over the network (header)
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*/
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@ -18,17 +18,19 @@
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#define __irc_write_h__
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GLOBAL BOOLEAN IRC_WriteStrClient PARAMS((CLIENT *Client, CHAR *Format, ... ));
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GLOBAL BOOLEAN IRC_WriteStrClientPrefix PARAMS((CLIENT *Client, CLIENT *Prefix, CHAR *Format, ... ));
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GLOBAL BOOLEAN IRC_WriteStrClient PARAMS(( CLIENT *Client, CHAR *Format, ... ));
|
||||
GLOBAL BOOLEAN IRC_WriteStrClientPrefix PARAMS(( CLIENT *Client, CLIENT *Prefix, CHAR *Format, ... ));
|
||||
|
||||
GLOBAL BOOLEAN IRC_WriteStrChannel PARAMS((CLIENT *Client, CHANNEL *Chan, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
GLOBAL BOOLEAN IRC_WriteStrChannelPrefix PARAMS((CLIENT *Client, CHANNEL *Chan, CLIENT *Prefix, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
GLOBAL BOOLEAN IRC_WriteStrChannel PARAMS(( CLIENT *Client, CHANNEL *Chan, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
GLOBAL BOOLEAN IRC_WriteStrChannelPrefix PARAMS(( CLIENT *Client, CHANNEL *Chan, CLIENT *Prefix, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
|
||||
GLOBAL VOID IRC_WriteStrServers PARAMS((CLIENT *ExceptOf, CHAR *Format, ... ));
|
||||
GLOBAL VOID IRC_WriteStrServersPrefix PARAMS((CLIENT *ExceptOf, CLIENT *Prefix, CHAR *Format, ... ));
|
||||
GLOBAL VOID IRC_WriteStrServersPrefixFlag PARAMS((CLIENT *ExceptOf, CLIENT *Prefix, CHAR Flag, CHAR *Format, ... ));
|
||||
GLOBAL VOID IRC_WriteStrServers PARAMS(( CLIENT *ExceptOf, CHAR *Format, ... ));
|
||||
GLOBAL VOID IRC_WriteStrServersPrefix PARAMS(( CLIENT *ExceptOf, CLIENT *Prefix, CHAR *Format, ... ));
|
||||
GLOBAL VOID IRC_WriteStrServersPrefixFlag PARAMS(( CLIENT *ExceptOf, CLIENT *Prefix, CHAR Flag, CHAR *Format, ... ));
|
||||
|
||||
GLOBAL BOOLEAN IRC_WriteStrRelatedPrefix PARAMS((CLIENT *Client, CLIENT *Prefix, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
GLOBAL BOOLEAN IRC_WriteStrRelatedPrefix PARAMS(( CLIENT *Client, CLIENT *Prefix, BOOLEAN Remote, CHAR *Format, ... ));
|
||||
|
||||
GLOBAL VOID IRC_SetPenalty PARAMS(( CLIENT *Client, INT Seconds ));
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
@ -14,7 +14,7 @@
|
||||
|
||||
#include "portab.h"
|
||||
|
||||
static char UNUSED id[] = "$Id: irc.c,v 1.121 2003/04/29 12:19:20 alex Exp $";
|
||||
static char UNUSED id[] = "$Id: irc.c,v 1.122 2003/11/05 23:24:48 alex Exp $";
|
||||
|
||||
#include "imp.h"
|
||||
#include <assert.h>
|
||||
@ -265,6 +265,7 @@ IRC_TRACE( CLIENT *Client, REQUEST *Req )
|
||||
/* Some information about us */
|
||||
if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Conf_ServerName, Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( Client )))) return DISCONNECTED;
|
||||
|
||||
IRC_SetPenalty( Client, 3 );
|
||||
return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
|
||||
} /* IRC_TRACE */
|
||||
|
||||
@ -286,6 +287,8 @@ IRC_HELP( CLIENT *Client, REQUEST *Req )
|
||||
if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
|
||||
cmd++;
|
||||
}
|
||||
|
||||
IRC_SetPenalty( Client, 2 );
|
||||
return CONNECTED;
|
||||
} /* IRC_HELP */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user