2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2005 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
20 static char UNUSED id[] = "$Id: conn.c,v 1.182 2005/09/24 02:20:00 fw Exp $";
34 #include <sys/socket.h>
36 #include <sys/types.h>
38 #include <netinet/in.h>
40 #ifdef HAVE_NETINET_IP_H
41 # include <netinet/ip.h>
44 #ifdef HAVE_ARPA_INET_H
45 # include <arpa/inet.h>
47 # define PF_INET AF_INET
51 # include <stdint.h> /* e.g. for Mac OS X */
55 # include <tcpd.h> /* for TCP Wrappers */
70 #include "conn-func.h"
76 # include "rendezvous.h"
82 #define SERVER_WAIT (NONE - 1)
85 static bool Handle_Write PARAMS(( CONN_ID Idx ));
86 static int New_Connection PARAMS(( int Sock ));
87 static CONN_ID Socket2Index PARAMS(( int Sock ));
88 static void Read_Request PARAMS(( CONN_ID Idx ));
89 static bool Handle_Buffer PARAMS(( CONN_ID Idx ));
90 static void Check_Connections PARAMS(( void ));
91 static void Check_Servers PARAMS(( void ));
92 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
93 static bool Init_Socket PARAMS(( int Sock ));
94 static void New_Server PARAMS(( int Server, CONN_ID Idx ));
95 static void Simple_Message PARAMS(( int Sock, char *Msg ));
96 static int Count_Connections PARAMS(( struct sockaddr_in addr ));
97 static int NewListener PARAMS(( const UINT16 Port ));
99 static array My_Listeners;
102 int allow_severity = LOG_INFO;
103 int deny_severity = LOG_ERR;
106 static void server_login PARAMS((CONN_ID idx));
108 static void cb_Read_Resolver_Result PARAMS(( int sock, UNUSED short what));
109 static void cb_clientserver PARAMS((int sock, short what));
112 cb_listen(int sock, short irrelevant)
115 New_Connection( sock );
120 cb_connserver(int sock, UNUSED short what)
125 CONN_ID idx = Socket2Index( sock );
128 Log(LOG_DEBUG, "cb_connserver wants to write on unknown socket?!");
134 assert( what & IO_WANTWRITE);
136 /* connect() finished, get result. */
137 sock_len = sizeof( err );
138 res = getsockopt( My_Connections[idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len );
139 assert( sock_len == sizeof( err ));
141 /* Fehler aufgetreten? */
142 if(( res != 0 ) || ( err != 0 )) {
144 Log( LOG_CRIT, "getsockopt (connection %d): %s!", idx, strerror( errno ));
146 Log( LOG_CRIT, "Can't connect socket to \"%s:%d\" (connection %d): %s!",
147 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port,
148 idx, strerror( err ));
150 /* Clean up socket, connection and client structures */
151 c = Client_GetFromConn( idx );
152 if( c ) Client_DestroyNow( c );
153 io_close( My_Connections[idx].sock );
154 Init_Conn_Struct( idx );
156 /* Bei Server-Verbindungen lasttry-Zeitpunkt auf "jetzt" setzen */
157 Conf_Server[Conf_GetServer( idx )].lasttry = time( NULL );
158 Conf_UnsetServer( idx );
162 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
168 server_login(CONN_ID idx)
170 Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx,
171 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
173 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
174 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
176 /* Send PASS and SERVER command to peer */
177 Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
178 Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
183 cb_clientserver(int sock, short what)
185 CONN_ID idx = Socket2Index( sock );
188 Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!");
194 if (what & IO_WANTREAD)
197 if (what & IO_WANTWRITE)
205 /* Modul initialisieren: statische Strukturen "ausnullen". */
209 /* Speicher fuer Verbindungs-Pool anfordern */
210 Pool_Size = CONNECTION_POOL;
211 if( Conf_MaxConnections > 0 )
213 /* konfiguriertes Limit beachten */
214 if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
216 My_Connections = (CONNECTION *) calloc( Pool_Size, sizeof( CONNECTION ) );
217 if( ! My_Connections )
219 /* Speicher konnte nicht alloziert werden! */
220 Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
224 Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
227 array_free( &My_Listeners );
229 /* Groesster File-Descriptor fuer select() */
232 /* Connection-Struktur initialisieren */
233 for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
235 /* Global write counter */
243 /* Modul abmelden: alle noch offenen Connections
244 * schliessen und freigeben. */
249 Log( LOG_DEBUG, "Shutting down all connections ..." );
252 Conn_ExitListeners();
254 /* Sockets schliessen */
255 for( idx = 0; idx < Pool_Size; idx++ ) {
256 if( My_Connections[idx].sock > NONE ) {
257 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
258 "Server going down (restarting)":"Server going down", true );
263 free( My_Connections );
264 My_Connections = NULL;
266 io_library_shutdown();
271 ports_initlisteners(array *a, void (*func)(int,short))
273 unsigned int created = 0, len;
277 len = array_length(a, sizeof (UINT16));
278 port = array_start(a);
280 fd = NewListener( *port );
285 if (!io_event_create( fd, IO_WANTREAD, func )) {
286 Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!",
287 fd, (unsigned int) *port, strerror(errno));
301 Conn_InitListeners( void )
303 /* Initialize ports on which the server should accept connections */
305 unsigned int created;
307 if (!io_library_init(CONNECTION_POOL)) {
308 Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
312 created = ports_initlisteners(&Conf_ListenPorts, cb_listen);
315 } /* Conn_InitListeners */
319 Conn_ExitListeners( void )
321 /* Close down all listening sockets */
325 Rendezvous_UnregisterListeners( );
328 arraylen = array_length(&My_Listeners, sizeof (int));
329 Log( LOG_INFO, "Shutting down all listening sockets (%d total)...", arraylen );
330 fd = array_start(&My_Listeners);
336 Log( LOG_DEBUG, "Listening socket %d closed.", *fd );
340 array_free(&My_Listeners);
341 } /* Conn_ExitListeners */
344 /* return new listening port file descriptor or -1 on failure */
346 NewListener( const UINT16 Port )
348 /* Create new listening socket on specified port */
350 struct sockaddr_in addr;
351 struct in_addr inaddr;
354 char name[CLIENT_ID_LEN], *info;
357 /* Server-"Listen"-Socket initialisieren */
358 memset( &addr, 0, sizeof( addr ));
359 memset( &inaddr, 0, sizeof( inaddr ));
360 addr.sin_family = AF_INET;
361 addr.sin_port = htons( Port );
362 if( Conf_ListenAddress[0] )
364 #ifdef HAVE_INET_ATON
365 if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
367 inaddr.s_addr = inet_addr( Conf_ListenAddress );
368 if( inaddr.s_addr == (unsigned)-1 )
371 Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!", Conf_ListenAddress, Port, Conf_ListenAddress );
375 else inaddr.s_addr = htonl( INADDR_ANY );
376 addr.sin_addr = inaddr;
378 /* Socket erzeugen */
379 sock = socket( PF_INET, SOCK_STREAM, 0);
382 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
386 if( ! Init_Socket( sock )) return -1;
389 if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 )
391 Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
396 /* in "listen mode" gehen :-) */
397 if( listen( sock, 10 ) != 0 )
399 Log( LOG_CRIT, "Can't listen on soecket: %s!", strerror( errno ));
404 /* Neuen Listener in Strukturen einfuegen */
405 if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) {
406 Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno ));
411 if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
412 else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
415 /* Get best server description text */
416 if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
419 /* Use server info string */
421 if( Conf_ServerInfo[0] == '[' )
423 /* Cut off leading hostname part in "[]" */
424 info = strchr( Conf_ServerInfo, ']' );
428 while( *info == ' ' ) info++;
431 if( ! info ) info = Conf_ServerInfo;
434 /* Add port number to description if non-standard */
435 if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port );
436 else strlcpy( name, info, sizeof( name ));
438 /* Register service */
439 Rendezvous_Register( name, MDNS_TYPE, Port );
448 /* "Main Loop.": Loop until a signal (for shutdown or restart) arrives.
449 * Call io_dispatch() to check for read/writeable sockets every second
450 * Wait for status change on pending connections (e.g: when the hostname has been resolved)
451 * check for penalty/timeouts
452 * handle input buffers
455 unsigned int wdatalen;
460 start = time( NULL );
461 while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart ))
466 Rendezvous_Handler( );
469 /* Should the configuration be reloaded? */
470 if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
472 /* Check configured servers and established links */
474 Check_Connections( );
478 /* noch volle Lese-Buffer suchen */
479 for( i = 0; i < Pool_Size; i++ )
481 if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) &&
482 ( My_Connections[i].delaytime < t ))
484 /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
485 if (Handle_Buffer( i )) timeout = false;
489 /* noch volle Schreib-Puffer suchen */
490 for( i = 0; i < Pool_Size; i++ ) {
491 if ( My_Connections[i].sock <= NONE )
494 wdatalen = array_bytes(&My_Connections[i].wbuf);
497 if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 ))
502 /* Socket der Verbindung in Set aufnehmen */
503 io_event_add( My_Connections[i].sock, IO_WANTWRITE );
507 /* von welchen Sockets koennte gelesen werden? */
508 for (i = 0; i < Pool_Size; i++ ) {
509 if ( My_Connections[i].sock <= NONE )
512 if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
513 /* wait for completion of Resolver Sub-Process */
514 io_event_del( My_Connections[i].sock, IO_WANTREAD );
518 if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING ))
519 continue; /* wait for completion of connect() */
521 if( My_Connections[i].delaytime > t ) {
522 /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
523 io_event_del( My_Connections[i].sock, IO_WANTREAD );
526 io_event_add( My_Connections[i].sock, IO_WANTREAD );
529 /* Timeout initialisieren */
531 if( timeout ) tv.tv_sec = 1;
534 /* Auf Aktivitaet warten */
535 i = io_dispatch( &tv );
536 if (i == -1 && errno != EINTR ) {
537 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno));
538 Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
543 if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
544 else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
549 * Write a text string into the socket of a connection.
550 * This function automatically appends CR+LF to the string and validates that
551 * the result is a valid IRC message (oversized messages are shortened, for
552 * example). Then it calls the Conn_Write() function to do the actual sending.
553 * @param Idx Index fo the connection.
554 * @param Format Format string, see printf().
555 * @return true on success, false otherwise.
559 Conn_WriteStr( CONN_ID Idx, char *Format, ... )
562 Conn_WriteStr( Idx, Format, va_alist )
568 char buffer[COMMAND_LEN];
572 assert( Idx > NONE );
573 assert( Format != NULL );
576 va_start( ap, Format );
580 if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
582 * The string that should be written to the socket is longer
583 * than the allowed size of COMMAND_LEN bytes (including both
584 * the CR and LF characters). This can be caused by the
585 * IRC_WriteXXX() functions when the prefix of this server had
586 * to be added to an already "quite long" command line which
587 * has been received from a regular IRC client, for example.
589 * We are not allowed to send such "oversized" messages to
590 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
591 * ("these messages SHALL NOT exceed 512 characters in length,
592 * counting all characters including the trailing CR-LF").
594 * So we have a big problem here: we should send more bytes
595 * to the network than we are allowed to and we don't know
596 * the originator (any more). The "old" behaviour of blaming
597 * the receiver ("next hop") is a bad idea (it could be just
598 * an other server only routing the message!), so the only
599 * option left is to shorten the string and to hope that the
600 * result is still somewhat useful ...
604 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
610 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
613 strlcat( buffer, "\r\n", sizeof( buffer ));
614 ok = Conn_Write( Idx, buffer, strlen( buffer ));
615 My_Connections[Idx].msg_out++;
619 } /* Conn_WriteStr */
623 Conn_Write( CONN_ID Idx, char *Data, unsigned int Len )
625 /* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
626 * der Client disconnectiert und false geliefert. */
628 assert( Idx > NONE );
629 assert( Data != NULL );
632 /* Ist der entsprechende Socket ueberhaupt noch offen? In einem
633 * "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
634 * ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
635 * In diesem Fall wird hier einfach ein Fehler geliefert. */
636 if( My_Connections[Idx].sock <= NONE )
639 Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
644 /* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
645 * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den
646 * Socket zu schreiben (u.a. wg. Komprimierung). */
647 if( array_bytes(&My_Connections[Idx].wbuf) >= WRITEBUFFER_LEN) {
648 /* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
649 * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
650 if( ! Handle_Write( Idx )) return false;
652 /* check again: if our writebuf is twice als large as the initial limit: Kill connection */
653 if( array_bytes(&My_Connections[Idx].wbuf) >= (WRITEBUFFER_LEN*2)) {
654 Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
655 Conn_Close( Idx, "Write buffer overflow!", NULL, false );
661 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
662 /* Daten komprimieren und in Puffer kopieren */
663 if( ! Zip_Buffer( Idx, Data, Len )) return false;
668 /* Daten in Puffer kopieren */
669 if (!array_catb( &My_Connections[Idx].wbuf, Data, Len ))
672 My_Connections[Idx].bytes_out += Len;
675 /* Adjust global write counter */
683 Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
685 /* Close connection. Open pipes of asyncronous resolver
686 * sub-processes are closed down. */
692 double in_z_k, out_z_k;
696 assert( Idx > NONE );
698 /* Is this link already shutting down? */
699 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
700 /* Conn_Close() has been called recursively for this link;
701 * probabe reason: Handle_Write() failed -- see below. */
703 Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
708 assert( My_Connections[Idx].sock > NONE );
710 /* Mark link as "closing" */
711 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
713 if( LogMsg ) txt = LogMsg;
715 if( ! txt ) txt = "Reason unknown";
717 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 ));
719 /* Search client, if any */
720 c = Client_GetFromConn( Idx );
722 /* Should the client be informed? */
725 /* Send statistics to client if registered as user: */
726 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
728 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
729 Client_ID(Client_ThisServer()), Client_ID(c),
731 (double)My_Connections[Idx].bytes_in / 1024,
732 (double)My_Connections[Idx].bytes_out / 1024);
736 /* Send ERROR to client (see RFC!) */
738 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
740 Conn_WriteStr(Idx, "ERROR :Closing connection.");
743 /* Try to write out the write buffer */
744 (void)Handle_Write( Idx );
746 /* Shut down socket */
747 if( ! io_close( My_Connections[Idx].sock ))
749 /* Oops, we can't close the socket!? This is ... ugly! */
750 Log( LOG_CRIT, "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port), strerror( errno ));
753 /* Mark socket as invalid: */
754 My_Connections[Idx].sock = NONE;
756 /* If there is still a client, unregister it now */
757 if( c ) Client_Destroy( c, LogMsg, FwdMsg, true );
759 /* Calculate statistics and log information */
760 in_k = (double)My_Connections[Idx].bytes_in / 1024;
761 out_k = (double)My_Connections[Idx].bytes_out / 1024;
763 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
764 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
765 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
766 in_p = (int)(( in_k * 100 ) / in_z_k );
767 out_p = (int)(( out_k * 100 ) / out_z_k );
768 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 );
773 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 );
776 /* cancel running resolver */
777 if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat)) {
778 Resolve_Shutdown(&My_Connections[Idx].res_stat);
781 /* Servers: Modify time of next connect attempt? */
782 Conf_UnsetServer( Idx );
785 /* Clean up zlib, if link was compressed */
786 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
787 inflateEnd( &My_Connections[Idx].zip.in );
788 deflateEnd( &My_Connections[Idx].zip.out );
789 array_free(&My_Connections[Idx].zip.rbuf);
790 array_free(&My_Connections[Idx].zip.wbuf);
794 array_free(&My_Connections[Idx].rbuf);
795 array_free(&My_Connections[Idx].wbuf);
796 /* Clean up connection structure (=free it) */
797 Init_Conn_Struct( Idx );
800 Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx );
806 Conn_SyncServerStruct( void )
808 /* Synchronize server structures (connection IDs):
809 * connections <-> configuration */
815 for( i = 0; i < Pool_Size; i++ )
817 /* Established connection? */
818 if( My_Connections[i].sock <= NONE ) continue;
820 /* Server connection? */
821 client = Client_GetFromConn( i );
822 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
824 for( c = 0; c < MAX_SERVERS; c++ )
826 /* Configured server? */
827 if( ! Conf_Server[c].host[0] ) continue;
830 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
833 } /* SyncServerStruct */
837 Handle_Write( CONN_ID Idx )
839 /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
842 unsigned int wdatalen;
844 assert( Idx > NONE );
845 if ( My_Connections[Idx].sock < 0 ) {
848 "Handle_Write() on closed socket, connection %d", Idx);
852 assert( My_Connections[Idx].sock > NONE );
855 Log(LOG_DEBUG, "Handle_Write() called for connection %d ...", Idx);
858 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
860 if (wdatalen == 0 && !array_bytes(&My_Connections[Idx].zip.wbuf)) {
861 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
865 /* write buffer empty, but not compression buffer?
866 * -> flush compression buffer! */
871 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
876 /* Zip_Flush() may have changed the write buffer ... */
877 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
879 len = write(My_Connections[Idx].sock,
880 array_start(&My_Connections[Idx].wbuf), wdatalen );
883 if (errno == EAGAIN || errno == EINTR)
886 Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
887 Idx, My_Connections[Idx].sock, strerror(errno));
888 Conn_Close(Idx, "Write error!", NULL, false);
892 /* move any data not yet written to beginning */
893 array_moveleft(&My_Connections[Idx].wbuf, 1, len);
900 New_Connection( int Sock )
902 /* Neue Client-Verbindung von Listen-Socket annehmen und
903 * CLIENT-Struktur anlegen. */
906 struct request_info req;
908 struct sockaddr_in new_addr;
909 int new_sock, new_sock_len;
915 assert( Sock > NONE );
916 /* Connection auf Listen-Socket annehmen */
917 new_sock_len = sizeof( new_addr );
918 new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len );
921 Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno ));
926 /* Validate socket using TCP Wrappers */
927 request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
929 if( ! hosts_access( &req ))
932 Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
933 Simple_Message( new_sock, "ERROR :Connection refused" );
939 /* Socket initialisieren */
940 Init_Socket( new_sock );
942 /* Check IP-based connection limit */
943 cnt = Count_Connections( new_addr );
944 if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
946 /* Access denied, too many connections from this IP address! */
947 Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt);
948 Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
953 /* Freie Connection-Struktur suchen */
954 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
955 if( idx >= Pool_Size )
957 new_size = Pool_Size + CONNECTION_POOL;
959 /* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden.
960 * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */
962 if( Conf_MaxConnections > 0 )
964 /* Es ist ein Limit konfiguriert */
965 if( Pool_Size >= Conf_MaxConnections )
967 /* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */
968 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
969 Simple_Message( new_sock, "ERROR :Connection limit reached" );
973 if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
975 if( new_size < Pool_Size )
977 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached -- overflow!", Pool_Size );
978 Simple_Message( new_sock, "ERROR :Connection limit reached" );
983 ptr = (POINTER *)realloc( My_Connections, sizeof( CONNECTION ) * new_size );
985 Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
986 Simple_Message( new_sock, "ERROR: Internal error" );
992 Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
995 /* Adjust pointer to new block */
996 My_Connections = (CONNECTION *)ptr;
998 /* Initialize new items */
999 for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
1002 /* Adjust new pool size */
1003 Pool_Size = new_size;
1006 /* Client-Struktur initialisieren */
1007 c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false );
1009 Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
1010 Simple_Message( new_sock, "ERROR :Internal error" );
1015 /* Verbindung registrieren */
1016 Init_Conn_Struct( idx );
1017 My_Connections[idx].sock = new_sock;
1018 My_Connections[idx].addr = new_addr;
1020 /* Neuen Socket registrieren */
1021 if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
1022 Simple_Message( new_sock, "ERROR :Internal error" );
1023 Conn_Close( idx, "io_event_create() failed", NULL, false );
1027 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 );
1029 /* Hostnamen ermitteln */
1030 strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
1031 Client_SetHostname( c, My_Connections[idx].host );
1033 Resolve_Addr(&My_Connections[idx].res_stat, &new_addr,
1034 My_Connections[idx].sock, cb_Read_Resolver_Result);
1036 /* Penalty-Zeit setzen */
1037 Conn_SetPenalty( idx, 4 );
1039 } /* New_Connection */
1043 Socket2Index( int Sock )
1045 /* zum Socket passende Connection suchen */
1049 assert( Sock > NONE );
1051 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
1053 if( idx >= Pool_Size )
1055 /* die Connection wurde vermutlich (wegen eines
1056 * Fehlers) bereits wieder abgebaut ... */
1058 Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
1063 } /* Socket2Index */
1067 Read_Request( CONN_ID Idx )
1069 /* Daten von Socket einlesen und entsprechend behandeln.
1070 * Tritt ein Fehler auf, so wird der Socket geschlossen. */
1076 assert( Idx > NONE );
1077 assert( My_Connections[Idx].sock > NONE );
1080 if (( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) ||
1081 ( array_bytes(&My_Connections[Idx].zip.rbuf) >= ZREADBUFFER_LEN ))
1083 if ( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN )
1086 /* Der Lesepuffer ist voll */
1087 Log( LOG_ERR, "Receive buffer overflow (connection %d): %d bytes!", Idx,
1088 array_bytes(&My_Connections[Idx].rbuf));
1089 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1093 len = read( My_Connections[Idx].sock, readbuf, sizeof readbuf -1 );
1095 Log( LOG_INFO, "%s:%d (%s) is closing the connection ...",
1096 My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port),
1097 inet_ntoa( My_Connections[Idx].addr.sin_addr ));
1098 Conn_Close( Idx, "Socket closed!", "Client closed connection", false );
1103 if( errno == EAGAIN ) return;
1104 Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx,
1105 My_Connections[Idx].sock, strerror( errno ));
1106 Conn_Close( Idx, "Read error!", "Client closed connection", false );
1110 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1111 if (!array_catb( &My_Connections[Idx].zip.rbuf, readbuf, len)) {
1112 Log( LOG_ERR, "Could not append recieved data to zip input buffer (connn %d): %d bytes!", Idx, len );
1113 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1120 if (!array_cats( &My_Connections[Idx].rbuf, readbuf )) {
1121 Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
1122 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1126 /* Update connection statistics */
1127 My_Connections[Idx].bytes_in += len;
1129 /* Update timestamp of last data received if this connection is
1130 * registered as a user, server or service connection. Don't update
1131 * otherwise, so users have at least Conf_PongTimeout seconds time to
1132 * register with the IRC server -- see Check_Connections(). */
1133 c = Client_GetFromConn(Idx);
1134 if (c && (Client_Type(c) == CLIENT_USER
1135 || Client_Type(c) == CLIENT_SERVER
1136 || Client_Type(c) == CLIENT_SERVICE))
1137 My_Connections[Idx].lastdata = time(NULL);
1139 /* Look at the data in the (read-) buffer of this connection */
1141 } /* Read_Request */
1145 Handle_Buffer( CONN_ID Idx )
1147 /* Handle Data in Connections Read-Buffer.
1148 * Return true if a reuqest was handled, false otherwise (also returned on errors). */
1162 if( My_Connections[Idx].delaytime > time( NULL )) return result;
1164 /* unpack compressed data */
1165 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP ))
1166 if( ! Unzip_Buffer( Idx )) return false;
1169 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1172 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */
1175 /* A Complete Request end with CR+LF, see RFC 2812. */
1176 ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" );
1178 if( ptr ) delta = 2; /* complete request */
1181 /* Check for non-RFC-compliant request (only CR or LF)? Unfortunately,
1182 * there are quite a few clients that do this (incl. "mIRC" :-( */
1183 ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' );
1184 ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' );
1186 if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
1187 else if( ptr1 ) ptr = ptr1;
1188 else if( ptr2 ) ptr = ptr2;
1195 /* End of request found */
1198 len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
1200 if( len < 0 || len > ( COMMAND_LEN - 1 )) {
1201 /* Request must not exceed 512 chars (incl. CR+LF!), see
1202 * RFC 2812. Disconnect Client if this happens. */
1203 Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!",
1204 Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 );
1205 Conn_Close( Idx, NULL, "Request too long", true );
1209 if (len <= 2) { /* request was empty (only '\r\n') */
1210 array_moveleft(&My_Connections[Idx].rbuf, 1, delta); /* delta is either 1 or 2 */
1214 /* remember if stream is already compressed */
1215 old_z = My_Connections[Idx].options & CONN_ZIP;
1218 My_Connections[Idx].msg_in++;
1219 if (!Parse_Request(Idx, (char*)array_start(&My_Connections[Idx].rbuf) ))
1224 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1227 "Connection %d: %d bytes left in read buffer.",
1228 Idx, array_bytes(&My_Connections[Idx].rbuf));
1231 if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) &&
1232 ( array_bytes(&My_Connections[Idx].rbuf) > 0 ))
1234 /* The last Command activated Socket-Compression.
1235 * Data that was read after that needs to be copied to Unzip-buf
1236 * for decompression */
1237 if( array_bytes(&My_Connections[Idx].rbuf)> ZREADBUFFER_LEN ) {
1238 Log( LOG_ALERT, "Connection %d: No space left in unzip buf (need %u bytes)!",
1239 Idx, array_bytes(&My_Connections[Idx].rbuf ));
1242 if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
1245 array_trunc(&My_Connections[Idx].rbuf);
1247 Log( LOG_DEBUG, "Moved already received data (%u bytes) to uncompression buffer.",
1248 array_bytes(&My_Connections[Idx].zip.rbuf));
1255 } /* Handle_Buffer */
1259 Check_Connections( void )
1261 /* check if connections are alive. if not, play PING-PONG first.
1262 * if this doesn't help either, disconnect client. */
1266 for( i = 0; i < Pool_Size; i++ ) {
1267 if (My_Connections[i].sock < 0)
1270 c = Client_GetFromConn( i );
1271 if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE )))
1273 /* connected User, Server or Service */
1274 if( My_Connections[i].lastping > My_Connections[i].lastdata ) {
1275 /* we already sent a ping */
1276 if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) {
1279 Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
1281 Conn_Close( i, NULL, "Ping timeout", true );
1284 else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) {
1285 /* we need to sent a PING */
1287 Log( LOG_DEBUG, "Connection %d: sending PING ...", i );
1289 My_Connections[i].lastping = time( NULL );
1290 Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( )));
1295 /* The connection is not fully established yet, so
1296 * we don't do the PING-PONG game here but instead
1297 * disconnect the client after "a short time" if it's
1298 * still not registered. */
1300 if (My_Connections[i].lastdata <
1301 time(NULL) - Conf_PongTimeout) {
1304 "Unregistered connection %d timed out ...",
1307 Conn_Close(i, NULL, "Timeout", false);
1311 } /* Check_Connections */
1315 Check_Servers( void )
1317 /* Check if we can establish further server links */
1322 /* Search all connections, are there results from the resolver? */
1323 for( idx = 0; idx < Pool_Size; idx++ ) {
1324 if( My_Connections[idx].sock != SERVER_WAIT ) continue;
1327 if (Resolve_SUCCESS(&My_Connections[idx].res_stat))
1328 New_Server(Conf_GetServer( idx ), idx);
1331 /* Check all configured servers */
1332 for( i = 0; i < MAX_SERVERS; i++ ) {
1333 /* Valid outgoing server which isn't already connected or disabled? */
1334 if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
1335 ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
1338 /* Is there already a connection in this group? */
1339 if( Conf_Server[i].group > NONE ) {
1340 for (n = 0; n < MAX_SERVERS; n++) {
1341 if (n == i) continue;
1342 if ((Conf_Server[n].conn_id > NONE) &&
1343 (Conf_Server[n].group == Conf_Server[i].group))
1346 if (n < MAX_SERVERS) continue;
1349 /* Check last connect attempt? */
1350 if( Conf_Server[i].lasttry > time( NULL ) - Conf_ConnectRetry )
1353 /* Okay, try to connect now */
1354 Conf_Server[i].lasttry = time( NULL );
1356 /* Search free connection structure */
1357 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
1358 if (idx >= Pool_Size) {
1359 Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!",
1364 Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
1367 Init_Conn_Struct( idx );
1368 My_Connections[idx].sock = SERVER_WAIT;
1369 Conf_Server[i].conn_id = idx;
1371 /* Resolve Hostname. If this fails, try to use it as an IP address */
1372 strlcpy( Conf_Server[i].ip, Conf_Server[i].host, sizeof( Conf_Server[i].ip ));
1373 strlcpy( My_Connections[idx].host, Conf_Server[i].host, sizeof( My_Connections[idx].host ));
1375 assert(Resolve_Getfd(&My_Connections[idx].res_stat) < 0);
1377 Resolve_Name(&My_Connections[idx].res_stat, Conf_Server[i].host, cb_Read_Resolver_Result);
1379 } /* Check_Servers */
1383 New_Server( int Server, CONN_ID Idx )
1385 /* Establish new server link */
1387 struct sockaddr_in new_addr;
1388 struct in_addr inaddr;
1392 assert( Server > NONE );
1393 assert( Idx > NONE );
1395 Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ", Conf_Server[Server].host,
1396 Conf_Server[Server].ip, Conf_Server[Server].port );
1398 #ifdef HAVE_INET_ATON
1399 if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
1401 memset( &inaddr, 0, sizeof( inaddr ));
1402 inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
1403 if( inaddr.s_addr == (unsigned)-1 )
1406 /* Can't convert IP address */
1407 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 );
1411 memset( &new_addr, 0, sizeof( new_addr ));
1412 new_addr.sin_family = AF_INET;
1413 new_addr.sin_addr = inaddr;
1414 new_addr.sin_port = htons( Conf_Server[Server].port );
1416 new_sock = socket( PF_INET, SOCK_STREAM, 0 );
1417 if ( new_sock < 0 ) {
1418 /* Can't create socket */
1419 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
1423 if( ! Init_Socket( new_sock )) return;
1425 res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
1426 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1427 /* Can't connect socket */
1428 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1433 /* Client-Struktur initialisieren */
1434 c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false );
1436 /* Can't create new client structure */
1437 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1442 Client_SetIntroducer( c, c );
1443 Client_SetToken( c, TOKEN_OUTBOUND );
1445 /* Register connection */
1446 My_Connections[Idx].sock = new_sock;
1447 My_Connections[Idx].addr = new_addr;
1448 strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
1450 /* Register new socket */
1451 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
1452 Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
1453 Conn_Close( Idx, "io_event_create() failed", NULL, false );
1458 Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
1460 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCONNECTING );
1463 Init_Conn_Struct( Idx );
1464 Conf_Server[Server].conn_id = NONE;
1469 Init_Conn_Struct( CONN_ID Idx )
1471 time_t now = time( NULL );
1472 /* Connection-Struktur initialisieren */
1474 memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
1475 My_Connections[Idx].sock = NONE;
1476 My_Connections[Idx].lastdata = now;
1477 My_Connections[Idx].lastprivmsg = now;
1478 Resolve_Init(&My_Connections[Idx].res_stat);
1479 } /* Init_Conn_Struct */
1483 Init_Socket( int Sock )
1485 /* Initialize socket (set options) */
1489 if (!io_setnonblock(Sock)) {
1490 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
1495 /* Don't block this port after socket shutdown */
1497 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
1499 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
1500 /* ignore this error */
1503 /* Set type of service (TOS) */
1504 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
1505 value = IPTOS_LOWDELAY;
1507 Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
1509 if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
1511 Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
1512 /* ignore this error */
1521 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
1523 /* Read result of resolver sub-process from pipe and update the
1524 * apropriate connection/client structure(s): hostname and/or
1525 * IDENT user name.*/
1532 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
1534 char readbuf[HOST_LEN + 1];
1538 Log( LOG_DEBUG, "Resolver: Got callback on fd %d, events %d", r_fd, events );
1541 /* Search associated connection ... */
1542 for( i = 0; i < Pool_Size; i++ ) {
1543 if(( My_Connections[i].sock != NONE )
1544 && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
1547 if( i >= Pool_Size ) {
1548 /* Ops, none found? Probably the connection has already
1549 * been closed!? We'll ignore that ... */
1552 Log( LOG_DEBUG, "Resolver: Got callback for unknown connection!?" );
1557 /* Read result from pipe */
1558 len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
1562 readbuf[len] = '\0';
1563 identptr = strchr(readbuf, '\n');
1564 assert(identptr != NULL);
1566 Log( LOG_CRIT, "Resolver: Got malformed result!");
1572 Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
1574 /* Okay, we got a complete result: this is a host name for outgoing
1575 * connections and a host name and IDENT user name (if enabled) for
1576 * incoming connections.*/
1577 if( My_Connections[i].sock > NONE ) {
1578 /* Incoming connection. Search client ... */
1579 c = Client_GetFromConn( i );
1580 assert( c != NULL );
1582 /* Only update client information of unregistered clients */
1583 if( Client_Type( c ) == CLIENT_UNKNOWN ) {
1584 strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
1585 Client_SetHostname( c, readbuf);
1589 Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, identptr);
1590 Client_SetUser( c, identptr, true );
1592 Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
1597 else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
1600 /* Outgoing connection (server link): set the IP address
1601 * so that we can connect to it in the main loop. */
1603 /* Search server ... */
1604 n = Conf_GetServer( i );
1607 strlcpy( Conf_Server[n].ip, readbuf, sizeof( Conf_Server[n].ip ));
1610 /* Reset penalty time */
1611 Conn_ResetPenalty( i );
1612 } /* cb_Read_Resolver_Result */
1616 Simple_Message( int Sock, char *Msg )
1618 char buf[COMMAND_LEN];
1619 /* Write "simple" message to socket, without using compression
1620 * or even the connection write buffers. Used e.g. for error
1621 * messages by New_Connection(). */
1622 assert( Sock > NONE );
1623 assert( Msg != NULL );
1625 strlcpy( buf, Msg, sizeof buf - 2);
1626 strlcat( buf, "\r\n", sizeof buf);
1627 (void)write( Sock, buf, strlen( buf ) );
1628 } /* Simple_Error */
1632 Count_Connections( struct sockaddr_in addr_in )
1637 for( i = 0; i < Pool_Size; i++ ) {
1638 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
1641 } /* Count_Connections */