2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
11 * Connection management
19 static char UNUSED id[] = "$Id: conn.c,v 1.126 2003/11/05 21:41:02 alex Exp $";
30 #include <sys/socket.h>
32 #include <sys/types.h>
34 #include <netinet/in.h>
36 #ifdef HAVE_ARPA_INET_H
37 #include <arpa/inet.h>
39 #define PF_INET AF_INET
43 #include <stdint.h> /* e.g. for Mac OS X */
47 #include <tcpd.h> /* for TCP Wrappers */
61 #include "conn-func.h"
67 #include "rendezvous.h"
73 #define SERVER_WAIT (NONE - 1)
76 LOCAL VOID Handle_Read PARAMS(( INT sock ));
77 LOCAL BOOLEAN Handle_Write PARAMS(( CONN_ID Idx ));
78 LOCAL VOID New_Connection PARAMS(( INT Sock ));
79 LOCAL CONN_ID Socket2Index PARAMS(( INT Sock ));
80 LOCAL VOID Read_Request PARAMS(( CONN_ID Idx ));
81 LOCAL BOOLEAN Try_Write PARAMS(( CONN_ID Idx ));
82 LOCAL BOOLEAN Handle_Buffer PARAMS(( CONN_ID Idx ));
83 LOCAL VOID Check_Connections PARAMS(( VOID ));
84 LOCAL VOID Check_Servers PARAMS(( VOID ));
85 LOCAL VOID Init_Conn_Struct PARAMS(( CONN_ID Idx ));
86 LOCAL BOOLEAN Init_Socket PARAMS(( INT Sock ));
87 LOCAL VOID New_Server PARAMS(( INT Server, CONN_ID Idx ));
88 LOCAL VOID Read_Resolver_Result PARAMS(( INT r_fd ));
89 LOCAL VOID Simple_Message PARAMS(( INT Sock, CHAR *Msg ));
90 LOCAL INT Count_Connections PARAMS(( struct sockaddr_in addr ));
92 LOCAL fd_set My_Listeners;
93 LOCAL fd_set My_Sockets;
94 LOCAL fd_set My_Connects;
97 INT allow_severity = LOG_INFO;
98 INT deny_severity = LOG_ERR;
105 /* Modul initialisieren: statische Strukturen "ausnullen". */
109 /* Speicher fuer Verbindungs-Pool anfordern */
110 Pool_Size = CONNECTION_POOL;
111 if( Conf_MaxConnections > 0 )
113 /* konfiguriertes Limit beachten */
114 if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
116 My_Connections = malloc( sizeof( CONNECTION ) * Pool_Size );
117 if( ! My_Connections )
119 /* Speicher konnte nicht alloziert werden! */
120 Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
123 Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
125 /* zu Beginn haben wir keine Verbindungen */
126 FD_ZERO( &My_Listeners );
127 FD_ZERO( &My_Sockets );
128 FD_ZERO( &My_Connects );
130 /* Groesster File-Descriptor fuer select() */
133 /* Connection-Struktur initialisieren */
134 for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
136 /* Global write counter */
144 /* Modul abmelden: alle noch offenen Connections
145 * schliessen und freigeben. */
150 Log( LOG_DEBUG, "Shutting down all connections ..." );
153 Rendezvous_UnregisterListeners( );
156 /* Sockets schliessen */
157 for( i = 0; i < Conn_MaxFD + 1; i++ )
159 if( FD_ISSET( i, &My_Sockets ))
161 for( idx = 0; idx < Pool_Size; idx++ )
163 if( My_Connections[idx].sock == i ) break;
165 if( FD_ISSET( i, &My_Listeners ))
168 Log( LOG_DEBUG, "Listening socket %d closed.", i );
170 else if( FD_ISSET( i, &My_Connects ))
173 Log( LOG_DEBUG, "Connection %d closed during creation (socket %d).", idx, i );
175 else if( idx < Pool_Size )
177 if( NGIRCd_SignalRestart ) Conn_Close( idx, NULL, "Server going down (restarting)", TRUE );
178 else Conn_Close( idx, NULL, "Server going down", TRUE );
182 Log( LOG_WARNING, "Closing unknown connection %d ...", i );
188 free( My_Connections );
189 My_Connections = NULL;
195 Conn_InitListeners( VOID )
197 /* Initialize ports on which the server should accept connections */
202 for( i = 0; i < Conf_ListenPorts_Count; i++ )
204 if( Conn_NewListener( Conf_ListenPorts[i] )) created++;
205 else Log( LOG_ERR, "Can't listen on port %u!", Conf_ListenPorts[i] );
208 } /* Conn_InitListeners */
212 Conn_ExitListeners( VOID )
214 /* Close down all listening sockets */
219 Rendezvous_UnregisterListeners( );
222 Log( LOG_INFO, "Shutting down all listening sockets ..." );
223 for( i = 0; i < Conn_MaxFD + 1; i++ )
225 if( FD_ISSET( i, &My_Sockets ) && FD_ISSET( i, &My_Listeners ))
228 Log( LOG_DEBUG, "Listening socket %d closed.", i );
231 } /* Conn_ExitListeners */
235 Conn_NewListener( CONST UINT Port )
237 /* Create new listening socket on specified port */
239 struct sockaddr_in addr;
240 struct in_addr inaddr;
243 CHAR name[CLIENT_ID_LEN], *info;
246 /* Server-"Listen"-Socket initialisieren */
247 memset( &addr, 0, sizeof( addr ));
248 memset( &inaddr, 0, sizeof( inaddr ));
249 addr.sin_family = AF_INET;
250 addr.sin_port = htons( Port );
251 if( Conf_ListenAddress[0] )
253 #ifdef HAVE_INET_ATON
254 if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
256 inaddr.s_addr = inet_addr( Conf_ListenAddress );
257 if( inaddr.s_addr == (unsigned)-1 )
260 Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!", Conf_ListenAddress, Port, Conf_ListenAddress );
264 else inaddr.s_addr = htonl( INADDR_ANY );
265 addr.sin_addr = inaddr;
267 /* Socket erzeugen */
268 sock = socket( PF_INET, SOCK_STREAM, 0);
271 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
275 if( ! Init_Socket( sock )) return FALSE;
278 if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 )
280 Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
285 /* in "listen mode" gehen :-) */
286 if( listen( sock, 10 ) != 0 )
288 Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno ));
293 /* Neuen Listener in Strukturen einfuegen */
294 FD_SET( sock, &My_Listeners );
295 FD_SET( sock, &My_Sockets );
297 if( sock > Conn_MaxFD ) Conn_MaxFD = sock;
299 if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
300 else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
303 /* Get best server description text */
304 if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
307 /* Use server info string */
309 if( Conf_ServerInfo[0] == '[' )
311 /* Cut off leading hostname part in "[]" */
312 info = strchr( Conf_ServerInfo, ']' );
316 while( *info == ' ' ) info++;
319 if( ! info ) info = Conf_ServerInfo;
322 /* Add port number to description if non-standard */
323 if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port );
324 else strlcpy( name, info, sizeof( name ));
326 /* Register service */
327 Rendezvous_Register( name, RENDEZVOUS_TYPE, Port );
331 } /* Conn_NewListener */
337 /* "Hauptschleife": Aktive Verbindungen ueberwachen. Folgende Aktionen
338 * werden dabei durchgefuehrt, bis der Server terminieren oder neu
341 * - neue Verbindungen annehmen,
342 * - Server-Verbindungen aufbauen,
343 * - geschlossene Verbindungen loeschen,
344 * - volle Schreibpuffer versuchen zu schreiben,
345 * - volle Lesepuffer versuchen zu verarbeiten,
346 * - Antworten von Resolver Sub-Prozessen annehmen.
349 fd_set read_sockets, write_sockets;
355 start = time( NULL );
356 while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart ))
361 Rendezvous_Handler( );
364 /* Should the configuration be reloaded? */
365 if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
367 /* Check configured servers and established links */
369 Check_Connections( );
371 /* noch volle Lese-Buffer suchen */
372 for( i = 0; i < Pool_Size; i++ )
374 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].rdatalen > 0 ))
376 /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
377 if( Handle_Buffer( i )) timeout = FALSE;
381 /* noch volle Schreib-Puffer suchen */
382 FD_ZERO( &write_sockets );
383 for( i = 0; i < Pool_Size; i++ )
386 if(( My_Connections[i].sock > NONE ) && (( My_Connections[i].wdatalen > 0 ) || ( My_Connections[i].zip.wdatalen > 0 )))
388 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].wdatalen > 0 ))
391 /* Socket der Verbindung in Set aufnehmen */
392 FD_SET( My_Connections[i].sock, &write_sockets );
396 /* Sockets mit im Aufbau befindlichen ausgehenden Verbindungen suchen */
397 for( i = 0; i < Pool_Size; i++ )
399 if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects ))) FD_SET( My_Connections[i].sock, &write_sockets );
402 /* von welchen Sockets koennte gelesen werden? */
404 read_sockets = My_Sockets;
405 for( i = 0; i < Pool_Size; i++ )
407 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].host[0] == '\0' ))
409 /* Hier muss noch auf den Resolver Sub-Prozess gewartet werden */
410 FD_CLR( My_Connections[i].sock, &read_sockets );
412 if(( My_Connections[i].sock > NONE ) && ( FD_ISSET( My_Connections[i].sock, &My_Connects )))
414 /* Hier laeuft noch ein asyncrones connect() */
415 FD_CLR( My_Connections[i].sock, &read_sockets );
417 if( My_Connections[i].delaytime > t )
419 /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
420 FD_CLR( My_Connections[i].sock, &read_sockets );
423 for( i = 0; i < Conn_MaxFD + 1; i++ )
425 /* Pipes von Resolver Sub-Prozessen aufnehmen */
426 if( FD_ISSET( i, &Resolver_FDs ))
428 FD_SET( i, &read_sockets );
432 /* Timeout initialisieren */
434 if( timeout ) tv.tv_sec = TIME_RES;
437 /* Auf Aktivitaet warten */
438 i = select( Conn_MaxFD + 1, &read_sockets, &write_sockets, NULL, &tv );
441 /* keine Veraenderung an den Sockets */
446 /* Fehler (z.B. Interrupt) */
449 Log( LOG_EMERG, "Conn_Handler(): select(): %s!", strerror( errno ));
450 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
456 /* Koennen Daten geschrieben werden? */
457 for( i = 0; i < Conn_MaxFD + 1; i++ )
459 if( ! FD_ISSET( i, &write_sockets )) continue;
461 /* Es kann geschrieben werden ... */
462 idx = Socket2Index( i );
463 if( idx == NONE ) continue;
465 if( ! Handle_Write( idx ))
467 /* Fehler beim Schreiben! Diesen Socket nun
468 * auch aus dem Read-Set entfernen: */
469 FD_CLR( i, &read_sockets );
473 /* Daten zum Lesen vorhanden? */
474 for( i = 0; i < Conn_MaxFD + 1; i++ )
476 if( FD_ISSET( i, &read_sockets )) Handle_Read( i );
480 if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
481 else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
487 Conn_WriteStr( CONN_ID Idx, CHAR *Format, ... )
490 Conn_WriteStr( Idx, Format, va_alist )
496 /* String in Socket schreiben. CR+LF wird von dieser Funktion
497 * automatisch angehaengt. Im Fehlerfall wird dir Verbindung
498 * getrennt und FALSE geliefert. */
500 CHAR buffer[COMMAND_LEN];
504 assert( Idx > NONE );
505 assert( Format != NULL );
508 va_start( ap, Format );
512 if( vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) == COMMAND_LEN - 2 )
514 Log( LOG_CRIT, "Text too long to send (connection %d)!", Idx );
515 Conn_Close( Idx, "Text too long to send!", NULL, FALSE );
520 if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer );
523 strlcat( buffer, "\r\n", sizeof( buffer ));
524 ok = Conn_Write( Idx, buffer, strlen( buffer ));
525 My_Connections[Idx].msg_out++;
529 } /* Conn_WriteStr */
533 Conn_Write( CONN_ID Idx, CHAR *Data, INT Len )
535 /* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
536 * der Client disconnectiert und FALSE geliefert. */
538 assert( Idx > NONE );
539 assert( Data != NULL );
542 /* Ist der entsprechende Socket ueberhaupt noch offen? In einem
543 * "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
544 * ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
545 * In diesem Fall wird hier einfach ein Fehler geliefert. */
546 if( My_Connections[Idx].sock <= NONE )
548 Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
552 /* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
553 * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den
554 * Socket zu schreiben (u.a. wg. Komprimierung). */
555 if( WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - Len <= 0 )
557 /* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
558 * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
559 if( ! Try_Write( Idx )) return FALSE;
561 /* nun neu pruefen: */
562 if( WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - Len <= 0 )
564 Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
565 Conn_Close( Idx, "Write buffer overflow!", NULL, FALSE );
571 if( My_Connections[Idx].options & CONN_ZIP )
573 /* Daten komprimieren und in Puffer kopieren */
574 if( ! Zip_Buffer( Idx, Data, Len )) return FALSE;
579 /* Daten in Puffer kopieren */
580 memcpy( My_Connections[Idx].wbuf + My_Connections[Idx].wdatalen, Data, Len );
581 My_Connections[Idx].wdatalen += Len;
582 My_Connections[Idx].bytes_out += Len;
585 /* Adjust global write counter */
593 Conn_Close( CONN_ID Idx, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN InformClient )
595 /* Close connection. Open pipes of asyncronous resolver
596 * sub-processes are closed down. */
601 DOUBLE in_z_k, out_z_k;
605 assert( Idx > NONE );
606 assert( My_Connections[Idx].sock > NONE );
608 /* Is this link already shutting down? */
609 if( My_Connections[Idx].options & CONN_ISCLOSING )
611 /* Conn_Close() has been called recursively for this link;
612 * probabe reason: Try_Write() failed -- see below. */
616 /* Mark link as "closing" */
617 My_Connections[Idx].options |= CONN_ISCLOSING;
619 /* Search client, if any */
620 c = Client_GetFromConn( Idx );
622 /* Should the client be informed? */
626 /* Send statistics to client if registered as user: */
627 if(( c != NULL ) && ( Client_Type( c ) == CLIENT_USER ))
629 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 );
633 /* Send ERROR to client (see RFC!) */
634 if( FwdMsg ) Conn_WriteStr( Idx, "ERROR :%s", FwdMsg );
635 else Conn_WriteStr( Idx, "ERROR :Closing connection." );
636 if( My_Connections[Idx].sock == NONE ) return;
639 /* Try to write out the write buffer */
640 (VOID)Try_Write( Idx );
642 /* Shut down socket */
643 if( close( My_Connections[Idx].sock ) != 0 )
645 /* Oops, we can't close the socket!? This is fatal! */
646 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 ));
647 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
651 /* Mark socket as invalid: */
652 FD_CLR( My_Connections[Idx].sock, &My_Sockets );
653 FD_CLR( My_Connections[Idx].sock, &My_Connects );
654 My_Connections[Idx].sock = NONE;
656 /* If there is still a client, unregister it now */
657 if( c ) Client_Destroy( c, LogMsg, FwdMsg, TRUE );
659 /* Calculate statistics and log information */
660 in_k = (DOUBLE)My_Connections[Idx].bytes_in / 1024;
661 out_k = (DOUBLE)My_Connections[Idx].bytes_out / 1024;
663 if( My_Connections[Idx].options & CONN_ZIP )
665 in_z_k = (DOUBLE)My_Connections[Idx].zip.bytes_in / 1024;
666 out_z_k = (DOUBLE)My_Connections[Idx].zip.bytes_out / 1024;
667 in_p = (INT)(( in_k * 100 ) / in_z_k );
668 out_p = (INT)(( out_k * 100 ) / out_z_k );
669 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 );
674 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 );
677 /* Is there a resolver sub-process running? */
678 if( My_Connections[Idx].res_stat )
680 /* Free resolver structures */
681 FD_CLR( My_Connections[Idx].res_stat->pipe[0], &Resolver_FDs );
682 close( My_Connections[Idx].res_stat->pipe[0] );
683 close( My_Connections[Idx].res_stat->pipe[1] );
684 free( My_Connections[Idx].res_stat );
687 /* Servers: Modify time of next connect attempt? */
688 Conf_UnsetServer( Idx );
691 /* Clean up zlib, if link was compressed */
692 if( Conn_Options( Idx ) & CONN_ZIP )
694 inflateEnd( &My_Connections[Idx].zip.in );
695 deflateEnd( &My_Connections[Idx].zip.out );
699 /* Clean up connection structure (=free it) */
700 Init_Conn_Struct( Idx );
705 Conn_SyncServerStruct( VOID )
707 /* Synchronize server structures (connection IDs):
708 * connections <-> configuration */
714 for( i = 0; i < Pool_Size; i++ )
716 /* Established connection? */
717 if( My_Connections[i].sock <= NONE ) continue;
719 /* Server connection? */
720 client = Client_GetFromConn( i );
721 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
723 for( c = 0; c < MAX_SERVERS; c++ )
725 /* Configured server? */
726 if( ! Conf_Server[c].host[0] ) continue;
729 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
732 } /* SyncServerStruct */
736 Try_Write( CONN_ID Idx )
738 /* Versuchen, Daten aus dem Schreib-Puffer in den Socket zu
739 * schreiben. TRUE wird geliefert, wenn entweder keine Daten
740 * zum Versenden vorhanden sind oder erfolgreich bearbeitet
741 * werden konnten. Im Fehlerfall wird FALSE geliefert und
742 * die Verbindung geschlossen. */
747 assert( Idx > NONE );
748 assert( My_Connections[Idx].sock > NONE );
750 /* sind ueberhaupt Daten vorhanden? */
752 if(( ! My_Connections[Idx].wdatalen > 0 ) && ( ! My_Connections[Idx].zip.wdatalen )) return TRUE;
754 if( ! My_Connections[Idx].wdatalen > 0 ) return TRUE;
757 /* Timeout initialisieren: 0 Sekunden, also nicht blockieren */
758 tv.tv_sec = 0; tv.tv_usec = 0;
760 FD_ZERO( &write_socket );
761 FD_SET( My_Connections[Idx].sock, &write_socket );
762 if( select( My_Connections[Idx].sock + 1, NULL, &write_socket, NULL, &tv ) == -1 )
767 Log( LOG_ALERT, "Try_Write(): select() failed: %s (con=%d, sock=%d)!", strerror( errno ), Idx, My_Connections[Idx].sock );
768 Conn_Close( Idx, "Server error!", NULL, FALSE );
773 if( FD_ISSET( My_Connections[Idx].sock, &write_socket )) return Handle_Write( Idx );
779 Handle_Read( INT Sock )
781 /* Aktivitaet auf einem Socket verarbeiten:
782 * - neue Clients annehmen,
783 * - Daten von Clients verarbeiten,
784 * - Resolver-Rueckmeldungen annehmen. */
788 assert( Sock > NONE );
790 if( FD_ISSET( Sock, &My_Listeners ))
792 /* es ist einer unserer Listener-Sockets: es soll
793 * also eine neue Verbindung aufgebaut werden. */
795 New_Connection( Sock );
797 else if( FD_ISSET( Sock, &Resolver_FDs ))
799 /* Rueckmeldung von einem Resolver Sub-Prozess */
801 Read_Resolver_Result( Sock );
805 /* Ein Client Socket: entweder ein User oder Server */
807 idx = Socket2Index( Sock );
808 if( idx > NONE ) Read_Request( idx );
814 Handle_Write( CONN_ID Idx )
816 /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
822 assert( Idx > NONE );
823 assert( My_Connections[Idx].sock > NONE );
825 if( FD_ISSET( My_Connections[Idx].sock, &My_Connects ))
827 /* es soll nichts geschrieben werden, sondern ein
828 * connect() hat ein Ergebnis geliefert */
830 FD_CLR( My_Connections[Idx].sock, &My_Connects );
832 /* Ergebnis des connect() ermitteln */
833 sock_len = sizeof( err );
834 res = getsockopt( My_Connections[Idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len );
835 assert( sock_len == sizeof( err ));
837 /* Fehler aufgetreten? */
838 if(( res != 0 ) || ( err != 0 ))
841 if( res != 0 ) Log( LOG_CRIT, "getsockopt (connection %d): %s!", Idx, strerror( errno ));
842 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 ));
844 /* Clean up socket, connection and client structures */
845 FD_CLR( My_Connections[Idx].sock, &My_Sockets );
846 c = Client_GetFromConn( Idx );
847 if( c ) Client_DestroyNow( c );
848 close( My_Connections[Idx].sock );
849 Init_Conn_Struct( Idx );
851 /* Bei Server-Verbindungen lasttry-Zeitpunkt auf "jetzt" setzen */
852 Conf_Server[Conf_GetServer( Idx )].lasttry = time( NULL );
853 Conf_UnsetServer( Idx );
857 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 );
859 /* PASS und SERVER verschicken */
860 Conn_WriteStr( Idx, "PASS %s %s", Conf_Server[Conf_GetServer( Idx )].pwd_out, NGIRCd_ProtoID );
861 return Conn_WriteStr( Idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
865 /* Schreibpuffer leer, aber noch Daten im Kompressionsbuffer?
866 * Dann muss dieser nun geflushed werden! */
867 if( My_Connections[Idx].wdatalen == 0 ) Zip_Flush( Idx );
870 assert( My_Connections[Idx].wdatalen > 0 );
872 /* Daten schreiben */
873 len = send( My_Connections[Idx].sock, My_Connections[Idx].wbuf, My_Connections[Idx].wdatalen, 0 );
876 /* Operation haette Socket "nur" blockiert ... */
877 if( errno == EAGAIN ) return TRUE;
879 /* Oops, ein Fehler! */
880 Log( LOG_ERR, "Write error on connection %d (socket %d): %s!", Idx, My_Connections[Idx].sock, strerror( errno ));
881 Conn_Close( Idx, "Write error!", NULL, FALSE );
885 /* Puffer anpassen */
886 My_Connections[Idx].wdatalen -= len;
887 memmove( My_Connections[Idx].wbuf, My_Connections[Idx].wbuf + len, My_Connections[Idx].wdatalen );
894 New_Connection( INT Sock )
896 /* Neue Client-Verbindung von Listen-Socket annehmen und
897 * CLIENT-Struktur anlegen. */
900 struct request_info req;
902 struct sockaddr_in new_addr;
903 INT new_sock, new_sock_len;
910 assert( Sock > NONE );
912 /* Connection auf Listen-Socket annehmen */
913 new_sock_len = sizeof( new_addr );
914 new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len );
917 Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno ));
922 /* Validate socket using TCP Wrappers */
923 request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
924 if( ! hosts_access( &req ))
927 Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
928 Simple_Message( new_sock, "ERROR :Connection refused" );
934 /* Socket initialisieren */
935 Init_Socket( new_sock );
937 /* Check IP-based connection limit */
938 cnt = Count_Connections( new_addr );
939 if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
941 /* Access denied, too many connections from this IP! */
942 Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP!", inet_ntoa( new_addr.sin_addr ), cnt);
943 Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP!" );
948 /* Freie Connection-Struktur suchen */
949 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
950 if( idx >= Pool_Size )
952 new_size = Pool_Size + CONNECTION_POOL;
954 /* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden.
955 * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */
957 if( Conf_MaxConnections > 0 )
959 /* Es ist ein Limit konfiguriert */
960 if( Pool_Size >= Conf_MaxConnections )
962 /* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */
963 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
964 Simple_Message( new_sock, "ERROR :Connection limit reached" );
968 if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
970 if( new_size < Pool_Size )
972 Log( LOG_ALERT, "Can't accespt connection: limit (%d) reached -- overflow!", Pool_Size );
973 Simple_Message( new_sock, "ERROR :Connection limit reached" );
978 /* zunaechst realloc() versuchen; wenn das scheitert, malloc() versuchen
979 * und Daten ggf. "haendisch" umkopieren. (Haesslich! Eine wirklich
980 * dynamische Verwaltung waere wohl _deutlich_ besser ...) */
981 ptr = realloc( My_Connections, sizeof( CONNECTION ) * new_size );
984 /* realloc() ist fehlgeschlagen. Nun malloc() probieren: */
985 ptr = malloc( sizeof( CONNECTION ) * new_size );
988 /* Offenbar steht kein weiterer Sepeicher zur Verfuegung :-( */
989 Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
990 Simple_Message( new_sock, "ERROR: Internal error" );
995 /* Struktur umkopieren ... */
996 memcpy( ptr, My_Connections, sizeof( CONNECTION ) * Pool_Size );
998 Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [malloc()/memcpy()]", new_size, sizeof( CONNECTION ) * new_size );
1000 else Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
1002 /* Adjust pointer to new block */
1003 My_Connections = ptr;
1005 /* Initialize new items */
1006 for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
1009 /* Adjust new pool size */
1010 Pool_Size = new_size;
1013 /* Client-Struktur initialisieren */
1014 c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, FALSE );
1017 Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
1018 Simple_Message( new_sock, "ERROR :Internal error" );
1023 /* Verbindung registrieren */
1024 Init_Conn_Struct( idx );
1025 My_Connections[idx].sock = new_sock;
1026 My_Connections[idx].addr = new_addr;
1028 /* Neuen Socket registrieren */
1029 FD_SET( new_sock, &My_Sockets );
1030 if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock;
1032 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 );
1034 /* Hostnamen ermitteln */
1035 strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
1036 Client_SetHostname( c, My_Connections[idx].host );
1037 s = Resolve_Addr( &new_addr );
1040 /* Sub-Prozess wurde asyncron gestartet */
1041 My_Connections[idx].res_stat = s;
1044 /* Penalty-Zeit setzen */
1045 Conn_SetPenalty( idx, 4 );
1046 } /* New_Connection */
1050 Socket2Index( INT Sock )
1052 /* zum Socket passende Connection suchen */
1056 assert( Sock > NONE );
1058 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
1060 if( idx >= Pool_Size )
1062 /* die Connection wurde vermutlich (wegen eines
1063 * Fehlers) bereits wieder abgebaut ... */
1064 Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
1068 } /* Socket2Index */
1072 Read_Request( CONN_ID Idx )
1074 /* Daten von Socket einlesen und entsprechend behandeln.
1075 * Tritt ein Fehler auf, so wird der Socket geschlossen. */
1082 assert( Idx > NONE );
1083 assert( My_Connections[Idx].sock > NONE );
1085 /* wenn noch nicht registriert: maximal mit ZREADBUFFER_LEN arbeiten,
1086 * ansonsten koennen Daten ggf. nicht umkopiert werden. */
1087 bsize = READBUFFER_LEN;
1089 c = Client_GetFromConn( Idx );
1090 if(( Client_Type( c ) != CLIENT_USER ) && ( Client_Type( c ) != CLIENT_SERVER ) && ( Client_Type( c ) != CLIENT_SERVICE ) && ( bsize > ZREADBUFFER_LEN )) bsize = ZREADBUFFER_LEN;
1094 if(( bsize - My_Connections[Idx].rdatalen - 1 < 1 ) || ( ZREADBUFFER_LEN - My_Connections[Idx].zip.rdatalen < 1 ))
1096 if( bsize - My_Connections[Idx].rdatalen - 1 < 1 )
1099 /* Der Lesepuffer ist voll */
1100 Log( LOG_ERR, "Read buffer overflow (connection %d): %d bytes!", Idx, My_Connections[Idx].rdatalen );
1101 Conn_Close( Idx, "Read buffer overflow!", NULL, FALSE );
1106 if( My_Connections[Idx].options & CONN_ZIP )
1108 len = recv( My_Connections[Idx].sock, My_Connections[Idx].zip.rbuf + My_Connections[Idx].zip.rdatalen, ( ZREADBUFFER_LEN - My_Connections[Idx].zip.rdatalen ), 0 );
1109 if( len > 0 ) My_Connections[Idx].zip.rdatalen += len;
1114 len = recv( My_Connections[Idx].sock, My_Connections[Idx].rbuf + My_Connections[Idx].rdatalen, bsize - My_Connections[Idx].rdatalen - 1, 0 );
1115 if( len > 0 ) My_Connections[Idx].rdatalen += len;
1120 /* Socket wurde geschlossen */
1121 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 ));
1122 Conn_Close( Idx, "Socket closed!", "Client closed connection", FALSE );
1128 /* Operation haette Socket "nur" blockiert ... */
1129 if( errno == EAGAIN ) return;
1131 /* Fehler beim Lesen */
1132 Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx, My_Connections[Idx].sock, strerror( errno ));
1133 Conn_Close( Idx, "Read error!", "Client closed connection", FALSE );
1137 /* Connection-Statistik aktualisieren */
1138 My_Connections[Idx].bytes_in += len;
1140 /* Timestamp aktualisieren */
1141 My_Connections[Idx].lastdata = time( NULL );
1143 Handle_Buffer( Idx );
1144 } /* Read_Request */
1148 Handle_Buffer( CONN_ID Idx )
1150 /* Daten im Lese-Puffer einer Verbindung verarbeiten.
1151 * Wurde ein Request verarbeitet, so wird TRUE geliefert,
1152 * ansonsten FALSE (auch bei Fehlern). */
1159 BOOLEAN action, result;
1168 /* ggf. noch unkomprimiete Daten weiter entpacken */
1169 if( My_Connections[Idx].options & CONN_ZIP )
1171 if( ! Unzip_Buffer( Idx )) return FALSE;
1175 if( My_Connections[Idx].rdatalen < 1 ) break;
1177 /* Eine komplette Anfrage muss mit CR+LF enden, vgl.
1178 * RFC 2812. Haben wir eine? */
1179 My_Connections[Idx].rbuf[My_Connections[Idx].rdatalen] = '\0';
1180 ptr = strstr( My_Connections[Idx].rbuf, "\r\n" );
1182 if( ptr ) delta = 2;
1186 /* Nicht RFC-konforme Anfrage mit nur CR oder LF? Leider
1187 * machen soetwas viele Clients, u.a. "mIRC" :-( */
1188 ptr1 = strchr( My_Connections[Idx].rbuf, '\r' );
1189 ptr2 = strchr( My_Connections[Idx].rbuf, '\n' );
1191 if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
1192 else if( ptr1 ) ptr = ptr1;
1193 else if( ptr2 ) ptr = ptr2;
1200 /* Ende der Anfrage wurde gefunden */
1202 len = ( ptr - My_Connections[Idx].rbuf ) + delta;
1203 if( len > ( COMMAND_LEN - 1 ))
1205 /* Eine Anfrage darf(!) nicht laenger als 512 Zeichen
1206 * (incl. CR+LF!) werden; vgl. RFC 2812. Wenn soetwas
1207 * empfangen wird, wird der Client disconnectiert. */
1208 Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!", Idx, My_Connections[Idx].rdatalen, COMMAND_LEN - 1 );
1209 Conn_Close( Idx, NULL, "Request too long", TRUE );
1214 /* merken, ob Stream bereits komprimiert wird */
1215 old_z = My_Connections[Idx].options & CONN_ZIP;
1220 /* Es wurde ein Request gelesen */
1221 My_Connections[Idx].msg_in++;
1222 if( ! Parse_Request( Idx, My_Connections[Idx].rbuf )) return FALSE;
1226 /* Puffer anpassen */
1227 My_Connections[Idx].rdatalen -= len;
1228 memmove( My_Connections[Idx].rbuf, My_Connections[Idx].rbuf + len, My_Connections[Idx].rdatalen );
1231 if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) && ( My_Connections[Idx].rdatalen > 0 ))
1233 /* Mit dem letzten Befehl wurde Socket-Kompression aktiviert.
1234 * Evtl. schon vom Socket gelesene Daten in den Unzip-Puffer
1235 * umkopieren, damit diese nun zunaechst entkomprimiert werden */
1237 if( My_Connections[Idx].rdatalen > ZREADBUFFER_LEN )
1239 /* Hupsa! Soviel Platz haben wir aber gar nicht! */
1240 Log( LOG_ALERT, "Can't move read buffer: No space left in unzip buffer (need %d bytes)!", My_Connections[Idx].rdatalen );
1243 memcpy( My_Connections[Idx].zip.rbuf, My_Connections[Idx].rbuf, My_Connections[Idx].rdatalen );
1244 My_Connections[Idx].zip.rdatalen = My_Connections[Idx].rdatalen;
1245 My_Connections[Idx].rdatalen = 0;
1246 Log( LOG_DEBUG, "Moved already received data (%d bytes) to uncompression buffer.", My_Connections[Idx].zip.rdatalen );
1252 if( action ) result = TRUE;
1256 } /* Handle_Buffer */
1260 Check_Connections( VOID )
1262 /* Pruefen, ob Verbindungen noch "alive" sind. Ist dies
1263 * nicht der Fall, zunaechst PING-PONG spielen und, wenn
1264 * auch das nicht "hilft", Client disconnectieren. */
1269 for( i = 0; i < Pool_Size; i++ )
1271 if( My_Connections[i].sock == NONE ) continue;
1273 c = Client_GetFromConn( i );
1274 if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE )))
1276 /* verbundener User, Server oder Service */
1277 if( My_Connections[i].lastping > My_Connections[i].lastdata )
1279 /* es wurde bereits ein PING gesendet */
1280 if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout )
1283 Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
1284 Conn_Close( i, NULL, "Ping timeout", TRUE );
1287 else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
1289 /* es muss ein PING gesendet werden */
1290 Log( LOG_DEBUG, "Connection %d: sending PING ...", i );
1291 My_Connections[i].lastping = time( NULL );
1292 Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( )));
1297 /* noch nicht vollstaendig aufgebaute Verbindung */
1298 if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout )
1301 Log( LOG_DEBUG, "Connection %d timed out ...", i );
1302 Conn_Close( i, NULL, "Timeout", FALSE );
1306 } /* Check_Connections */
1310 Check_Servers( VOID )
1312 /* Check if we can establish further server links */
1318 /* Serach all connections, are there results from the resolver? */
1319 for( idx = 0; idx < Pool_Size; idx++ )
1321 if( My_Connections[idx].sock != SERVER_WAIT ) continue;
1324 if( My_Connections[idx].res_stat == NULL ) New_Server( Conf_GetServer( idx ), idx );
1327 /* Check all configured servers */
1328 for( i = 0; i < MAX_SERVERS; i++ )
1330 /* Valid outgoing server which isn't already connected or disabled? */
1331 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;
1333 /* Is there already a connection in this group? */
1334 if( Conf_Server[i].group > NONE )
1336 for( n = 0; n < MAX_SERVERS; n++ )
1338 if( n == i ) continue;
1339 if(( Conf_Server[n].conn_id > NONE ) && ( Conf_Server[n].group == Conf_Server[i].group )) break;
1341 if( n < MAX_SERVERS ) continue;
1344 /* Check last connect attempt? */
1345 if( Conf_Server[i].lasttry > time( NULL ) - Conf_ConnectRetry ) continue;
1347 /* Okay, try to connect now */
1348 Conf_Server[i].lasttry = time( NULL );
1350 /* Search free connection structure */
1351 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
1352 if( idx >= Pool_Size )
1354 Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!", Pool_Size );
1357 Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
1359 /* Verbindungs-Struktur initialisieren */
1360 Init_Conn_Struct( idx );
1361 My_Connections[idx].sock = SERVER_WAIT;
1362 Conf_Server[i].conn_id = idx;
1364 /* Resolve Hostname. If this fails, try to use it as an IP address */
1365 strlcpy( Conf_Server[i].ip, Conf_Server[i].host, sizeof( Conf_Server[i].ip ));
1366 strlcpy( My_Connections[idx].host, Conf_Server[i].host, sizeof( My_Connections[idx].host ));
1367 s = Resolve_Name( Conf_Server[i].host );
1370 /* Sub-Prozess wurde asyncron gestartet */
1371 My_Connections[idx].res_stat = s;
1374 } /* Check_Servers */
1378 New_Server( INT Server, CONN_ID Idx )
1380 /* Establish new server link */
1382 struct sockaddr_in new_addr;
1383 struct in_addr inaddr;
1387 assert( Server > NONE );
1388 assert( Idx > NONE );
1390 /* Did we get a valid IP address? */
1391 if( ! Conf_Server[Server].ip[0] )
1393 /* No. Free connection structure and abort: */
1394 Init_Conn_Struct( Idx );
1395 Conf_Server[Server].conn_id = NONE;
1396 Log( LOG_ERR, "Can't connect to \"%s\" (connection %d): ip address unknown!", Conf_Server[Server].host, Idx );
1400 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 );
1402 #ifdef HAVE_INET_ATON
1403 if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
1405 memset( &inaddr, 0, sizeof( inaddr ));
1406 inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
1407 if( inaddr.s_addr == (unsigned)-1 )
1410 /* Can't convert IP address */
1411 Init_Conn_Struct( Idx );
1412 Conf_Server[Server].conn_id = NONE;
1413 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 );
1417 memset( &new_addr, 0, sizeof( new_addr ));
1418 new_addr.sin_family = AF_INET;
1419 new_addr.sin_addr = inaddr;
1420 new_addr.sin_port = htons( Conf_Server[Server].port );
1422 new_sock = socket( PF_INET, SOCK_STREAM, 0 );
1425 /* Can't create socket */
1426 Init_Conn_Struct( Idx );
1427 Conf_Server[Server].conn_id = NONE;
1428 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
1432 if( ! Init_Socket( new_sock )) return;
1434 res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
1435 if(( res != 0 ) && ( errno != EINPROGRESS ))
1437 /* Can't connect socket */
1438 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1440 Init_Conn_Struct( Idx );
1441 Conf_Server[Server].conn_id = NONE;
1445 /* Client-Struktur initialisieren */
1446 c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, FALSE );
1449 /* Can't create new client structure */
1451 Init_Conn_Struct( Idx );
1452 Conf_Server[Server].conn_id = NONE;
1453 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1456 Client_SetIntroducer( c, c );
1457 Client_SetToken( c, TOKEN_OUTBOUND );
1459 /* Register connection */
1460 My_Connections[Idx].sock = new_sock;
1461 My_Connections[Idx].addr = new_addr;
1462 strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
1464 /* Register new socket */
1465 FD_SET( new_sock, &My_Sockets );
1466 FD_SET( new_sock, &My_Connects );
1467 if( new_sock > Conn_MaxFD ) Conn_MaxFD = new_sock;
1469 Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
1474 Init_Conn_Struct( CONN_ID Idx )
1476 /* Connection-Struktur initialisieren */
1478 My_Connections[Idx].sock = NONE;
1479 My_Connections[Idx].res_stat = NULL;
1480 My_Connections[Idx].host[0] = '\0';
1481 My_Connections[Idx].rbuf[0] = '\0';
1482 My_Connections[Idx].rdatalen = 0;
1483 My_Connections[Idx].wbuf[0] = '\0';
1484 My_Connections[Idx].wdatalen = 0;
1485 My_Connections[Idx].starttime = time( NULL );
1486 My_Connections[Idx].lastdata = time( NULL );
1487 My_Connections[Idx].lastping = 0;
1488 My_Connections[Idx].lastprivmsg = time( NULL );
1489 My_Connections[Idx].delaytime = 0;
1490 My_Connections[Idx].bytes_in = 0;
1491 My_Connections[Idx].bytes_out = 0;
1492 My_Connections[Idx].msg_in = 0;
1493 My_Connections[Idx].msg_out = 0;
1494 My_Connections[Idx].flag = 0;
1495 My_Connections[Idx].options = 0;
1498 My_Connections[Idx].zip.rbuf[0] = '\0';
1499 My_Connections[Idx].zip.rdatalen = 0;
1500 My_Connections[Idx].zip.wbuf[0] = '\0';
1501 My_Connections[Idx].zip.wdatalen = 0;
1502 My_Connections[Idx].zip.bytes_in = 0;
1503 My_Connections[Idx].zip.bytes_out = 0;
1505 } /* Init_Conn_Struct */
1509 Init_Socket( INT Sock )
1511 /* Socket-Optionen setzen */
1515 #ifdef O_NONBLOCK /* A/UX kennt das nicht? */
1516 if( fcntl( Sock, F_SETFL, O_NONBLOCK ) != 0 )
1518 Log( LOG_CRIT, "Can't enable non-blocking mode: %s!", strerror( errno ));
1523 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &on, (socklen_t)sizeof( on )) != 0)
1525 Log( LOG_ERR, "Can't set socket options: %s!", strerror( errno ));
1526 /* dieser Fehler kann ignoriert werden. */
1534 Read_Resolver_Result( INT r_fd )
1536 /* Ergebnis von Resolver Sub-Prozess aus Pipe lesen
1537 * und entsprechende Connection aktualisieren */
1539 CHAR result[HOST_LEN];
1543 FD_CLR( r_fd, &Resolver_FDs );
1545 /* Anfrage vom Parent lesen */
1546 len = read( r_fd, result, HOST_LEN - 1 );
1549 /* Fehler beim Lesen aus der Pipe */
1551 Log( LOG_CRIT, "Resolver: Can't read result: %s!", strerror( errno ));
1556 /* zugehoerige Connection suchen */
1557 for( i = 0; i < Pool_Size; i++ )
1559 if(( My_Connections[i].sock != NONE ) && ( My_Connections[i].res_stat ) && ( My_Connections[i].res_stat->pipe[0] == r_fd )) break;
1561 if( i >= Pool_Size )
1563 /* Opsa! Keine passende Connection gefunden!? Vermutlich
1564 * wurde sie schon wieder geschlossen. */
1566 Log( LOG_DEBUG, "Resolver: Got result for unknown connection!?" );
1570 Log( LOG_DEBUG, "Resolver: %s is \"%s\".", My_Connections[i].host, result );
1573 close( My_Connections[i].res_stat->pipe[0] );
1574 close( My_Connections[i].res_stat->pipe[1] );
1575 free( My_Connections[i].res_stat );
1576 My_Connections[i].res_stat = NULL;
1578 if( My_Connections[i].sock > NONE )
1580 /* Eingehende Verbindung: Hostnamen setzen */
1581 c = Client_GetFromConn( i );
1582 assert( c != NULL );
1583 strlcpy( My_Connections[i].host, result, sizeof( My_Connections[i].host ));
1584 Client_SetHostname( c, result );
1588 /* Ausgehende Verbindung (=Server): IP setzen */
1589 n = Conf_GetServer( i );
1590 if( n > NONE ) strlcpy( Conf_Server[n].ip, result, sizeof( Conf_Server[n].ip ));
1591 else Log( LOG_ERR, "Got resolver result for non-configured server!?" );
1594 /* Penalty-Zeit zurueck setzen */
1595 Conn_ResetPenalty( i );
1596 } /* Read_Resolver_Result */
1600 Simple_Message( INT Sock, CHAR *Msg )
1602 /* Write "simple" message to socket, without using compression
1603 * or even the connection write buffers. Used e.g. for error
1604 * messages by New_Connection(). */
1606 assert( Sock > NONE );
1607 assert( Msg != NULL );
1609 (VOID)send( Sock, Msg, strlen( Msg ), 0 );
1610 (VOID)send( Sock, "\r\n", 2, 0 );
1611 } /* Simple_Error */
1615 Count_Connections( struct sockaddr_in addr_in )
1620 for( i = 0; i < Pool_Size; i++ )
1622 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
1625 } /* Count_Connections */