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 1.183 2005/09/24 02:48:46 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!",
372 Conf_ListenAddress, Port, Conf_ListenAddress );
376 else inaddr.s_addr = htonl( INADDR_ANY );
377 addr.sin_addr = inaddr;
379 sock = socket( PF_INET, SOCK_STREAM, 0);
381 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
385 if( ! Init_Socket( sock )) return -1;
387 if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 ) {
388 Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
393 if( listen( sock, 10 ) != 0 ) {
394 Log( LOG_CRIT, "Can't listen on socket: %s!", strerror( errno ));
399 /* keep fd in list so we can close it when ngircd restarts/shuts down */
400 if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) {
401 Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno ));
406 if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
407 else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
410 /* Get best server description text */
411 if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
414 /* Use server info string */
416 if( Conf_ServerInfo[0] == '[' )
418 /* Cut off leading hostname part in "[]" */
419 info = strchr( Conf_ServerInfo, ']' );
423 while( *info == ' ' ) info++;
426 if( ! info ) info = Conf_ServerInfo;
429 /* Add port number to description if non-standard */
430 if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port );
431 else strlcpy( name, info, sizeof( name ));
433 /* Register service */
434 Rendezvous_Register( name, MDNS_TYPE, Port );
443 /* "Main Loop.": Loop until a signal (for shutdown or restart) arrives.
444 * Call io_dispatch() to check for read/writeable sockets every second
445 * Wait for status change on pending connections (e.g: when the hostname has been resolved)
446 * check for penalty/timeouts
447 * handle input buffers
450 unsigned int wdatalen;
455 while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart )) {
459 Rendezvous_Handler( );
462 /* Should the configuration be reloaded? */
463 if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
465 /* Check configured servers and established links */
467 Check_Connections( );
471 /* noch volle Lese-Buffer suchen */
472 for( i = 0; i < Pool_Size; i++ ) {
473 if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) &&
474 ( My_Connections[i].delaytime < t ))
476 /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
477 if (Handle_Buffer( i )) timeout = false;
481 /* noch volle Schreib-Puffer suchen */
482 for( i = 0; i < Pool_Size; i++ ) {
483 if ( My_Connections[i].sock <= NONE )
486 wdatalen = array_bytes(&My_Connections[i].wbuf);
489 if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 ))
494 /* Socket der Verbindung in Set aufnehmen */
495 io_event_add( My_Connections[i].sock, IO_WANTWRITE );
499 /* von welchen Sockets koennte gelesen werden? */
500 for (i = 0; i < Pool_Size; i++ ) {
501 if ( My_Connections[i].sock <= NONE )
504 if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
505 /* wait for completion of Resolver Sub-Process */
506 io_event_del( My_Connections[i].sock, IO_WANTREAD );
510 if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING ))
511 continue; /* wait for completion of connect() */
513 if( My_Connections[i].delaytime > t ) {
514 /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
515 io_event_del( My_Connections[i].sock, IO_WANTREAD );
518 io_event_add( My_Connections[i].sock, IO_WANTREAD );
521 /* (re-)set timeout - tv_sec/usec are undefined after io_dispatch() returns */
523 tv.tv_sec = timeout ? 1 : 0;
525 /* wait for activity */
526 i = io_dispatch( &tv );
527 if (i == -1 && errno != EINTR ) {
528 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno));
529 Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
534 if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
535 else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
540 * Write a text string into the socket of a connection.
541 * This function automatically appends CR+LF to the string and validates that
542 * the result is a valid IRC message (oversized messages are shortened, for
543 * example). Then it calls the Conn_Write() function to do the actual sending.
544 * @param Idx Index fo the connection.
545 * @param Format Format string, see printf().
546 * @return true on success, false otherwise.
550 Conn_WriteStr( CONN_ID Idx, char *Format, ... )
553 Conn_WriteStr( Idx, Format, va_alist )
559 char buffer[COMMAND_LEN];
563 assert( Idx > NONE );
564 assert( Format != NULL );
567 va_start( ap, Format );
571 if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
573 * The string that should be written to the socket is longer
574 * than the allowed size of COMMAND_LEN bytes (including both
575 * the CR and LF characters). This can be caused by the
576 * IRC_WriteXXX() functions when the prefix of this server had
577 * to be added to an already "quite long" command line which
578 * has been received from a regular IRC client, for example.
580 * We are not allowed to send such "oversized" messages to
581 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
582 * ("these messages SHALL NOT exceed 512 characters in length,
583 * counting all characters including the trailing CR-LF").
585 * So we have a big problem here: we should send more bytes
586 * to the network than we are allowed to and we don't know
587 * the originator (any more). The "old" behaviour of blaming
588 * the receiver ("next hop") is a bad idea (it could be just
589 * an other server only routing the message!), so the only
590 * option left is to shorten the string and to hope that the
591 * result is still somewhat useful ...
595 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
601 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
604 strlcat( buffer, "\r\n", sizeof( buffer ));
605 ok = Conn_Write( Idx, buffer, strlen( buffer ));
606 My_Connections[Idx].msg_out++;
610 } /* Conn_WriteStr */
614 Conn_Write( CONN_ID Idx, char *Data, unsigned int Len )
616 /* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
617 * der Client disconnectiert und false geliefert. */
619 assert( Idx > NONE );
620 assert( Data != NULL );
623 /* Ist der entsprechende Socket ueberhaupt noch offen? In einem
624 * "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
625 * ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
626 * In diesem Fall wird hier einfach ein Fehler geliefert. */
627 if( My_Connections[Idx].sock <= NONE )
630 Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
635 /* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
636 * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den
637 * Socket zu schreiben (u.a. wg. Komprimierung). */
638 if( array_bytes(&My_Connections[Idx].wbuf) >= WRITEBUFFER_LEN) {
639 /* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
640 * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
641 if( ! Handle_Write( Idx )) return false;
643 /* check again: if our writebuf is twice als large as the initial limit: Kill connection */
644 if( array_bytes(&My_Connections[Idx].wbuf) >= (WRITEBUFFER_LEN*2)) {
645 Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
646 Conn_Close( Idx, "Write buffer overflow!", NULL, false );
652 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
653 /* Daten komprimieren und in Puffer kopieren */
654 if( ! Zip_Buffer( Idx, Data, Len )) return false;
659 /* Daten in Puffer kopieren */
660 if (!array_catb( &My_Connections[Idx].wbuf, Data, Len ))
663 My_Connections[Idx].bytes_out += Len;
666 /* Adjust global write counter */
674 Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
676 /* Close connection. Open pipes of asyncronous resolver
677 * sub-processes are closed down. */
683 double in_z_k, out_z_k;
687 assert( Idx > NONE );
689 /* Is this link already shutting down? */
690 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
691 /* Conn_Close() has been called recursively for this link;
692 * probabe reason: Handle_Write() failed -- see below. */
694 Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
699 assert( My_Connections[Idx].sock > NONE );
701 /* Mark link as "closing" */
702 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
704 if( LogMsg ) txt = LogMsg;
706 if( ! txt ) txt = "Reason unknown";
708 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 ));
710 /* Search client, if any */
711 c = Client_GetFromConn( Idx );
713 /* Should the client be informed? */
716 /* Send statistics to client if registered as user: */
717 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
719 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
720 Client_ID(Client_ThisServer()), Client_ID(c),
722 (double)My_Connections[Idx].bytes_in / 1024,
723 (double)My_Connections[Idx].bytes_out / 1024);
727 /* Send ERROR to client (see RFC!) */
729 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
731 Conn_WriteStr(Idx, "ERROR :Closing connection.");
734 /* Try to write out the write buffer */
735 (void)Handle_Write( Idx );
737 /* Shut down socket */
738 if( ! io_close( My_Connections[Idx].sock ))
740 /* Oops, we can't close the socket!? This is ... ugly! */
741 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 ));
744 /* Mark socket as invalid: */
745 My_Connections[Idx].sock = NONE;
747 /* If there is still a client, unregister it now */
748 if( c ) Client_Destroy( c, LogMsg, FwdMsg, true );
750 /* Calculate statistics and log information */
751 in_k = (double)My_Connections[Idx].bytes_in / 1024;
752 out_k = (double)My_Connections[Idx].bytes_out / 1024;
754 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
755 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
756 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
757 in_p = (int)(( in_k * 100 ) / in_z_k );
758 out_p = (int)(( out_k * 100 ) / out_z_k );
759 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 );
764 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 );
767 /* cancel running resolver */
768 if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat)) {
769 Resolve_Shutdown(&My_Connections[Idx].res_stat);
772 /* Servers: Modify time of next connect attempt? */
773 Conf_UnsetServer( Idx );
776 /* Clean up zlib, if link was compressed */
777 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
778 inflateEnd( &My_Connections[Idx].zip.in );
779 deflateEnd( &My_Connections[Idx].zip.out );
780 array_free(&My_Connections[Idx].zip.rbuf);
781 array_free(&My_Connections[Idx].zip.wbuf);
785 array_free(&My_Connections[Idx].rbuf);
786 array_free(&My_Connections[Idx].wbuf);
787 /* Clean up connection structure (=free it) */
788 Init_Conn_Struct( Idx );
791 Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx );
797 Conn_SyncServerStruct( void )
799 /* Synchronize server structures (connection IDs):
800 * connections <-> configuration */
806 for( i = 0; i < Pool_Size; i++ )
808 /* Established connection? */
809 if( My_Connections[i].sock <= NONE ) continue;
811 /* Server connection? */
812 client = Client_GetFromConn( i );
813 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
815 for( c = 0; c < MAX_SERVERS; c++ )
817 /* Configured server? */
818 if( ! Conf_Server[c].host[0] ) continue;
821 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
824 } /* SyncServerStruct */
828 Handle_Write( CONN_ID Idx )
830 /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
833 unsigned int wdatalen;
835 assert( Idx > NONE );
836 if ( My_Connections[Idx].sock < 0 ) {
839 "Handle_Write() on closed socket, connection %d", Idx);
843 assert( My_Connections[Idx].sock > NONE );
846 Log(LOG_DEBUG, "Handle_Write() called for connection %d ...", Idx);
849 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
851 if (wdatalen == 0 && !array_bytes(&My_Connections[Idx].zip.wbuf)) {
852 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
856 /* write buffer empty, but not compression buffer?
857 * -> flush compression buffer! */
862 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
867 /* Zip_Flush() may have changed the write buffer ... */
868 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
870 len = write(My_Connections[Idx].sock,
871 array_start(&My_Connections[Idx].wbuf), wdatalen );
874 if (errno == EAGAIN || errno == EINTR)
877 Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
878 Idx, My_Connections[Idx].sock, strerror(errno));
879 Conn_Close(Idx, "Write error!", NULL, false);
883 /* move any data not yet written to beginning */
884 array_moveleft(&My_Connections[Idx].wbuf, 1, len);
891 New_Connection( int Sock )
893 /* Neue Client-Verbindung von Listen-Socket annehmen und
894 * CLIENT-Struktur anlegen. */
897 struct request_info req;
899 struct sockaddr_in new_addr;
900 int new_sock, new_sock_len;
906 assert( Sock > NONE );
907 /* Connection auf Listen-Socket annehmen */
908 new_sock_len = sizeof( new_addr );
909 new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len );
912 Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno ));
917 /* Validate socket using TCP Wrappers */
918 request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
920 if( ! hosts_access( &req ))
923 Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
924 Simple_Message( new_sock, "ERROR :Connection refused" );
930 /* Socket initialisieren */
931 Init_Socket( new_sock );
933 /* Check IP-based connection limit */
934 cnt = Count_Connections( new_addr );
935 if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
937 /* Access denied, too many connections from this IP address! */
938 Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt);
939 Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
944 /* Freie Connection-Struktur suchen */
945 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
946 if( idx >= Pool_Size )
948 new_size = Pool_Size + CONNECTION_POOL;
950 /* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden.
951 * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */
953 if( Conf_MaxConnections > 0 )
955 /* Es ist ein Limit konfiguriert */
956 if( Pool_Size >= Conf_MaxConnections )
958 /* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */
959 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
960 Simple_Message( new_sock, "ERROR :Connection limit reached" );
964 if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
966 if( new_size < Pool_Size )
968 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached -- overflow!", Pool_Size );
969 Simple_Message( new_sock, "ERROR :Connection limit reached" );
974 ptr = (POINTER *)realloc( My_Connections, sizeof( CONNECTION ) * new_size );
976 Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
977 Simple_Message( new_sock, "ERROR: Internal error" );
983 Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
986 /* Adjust pointer to new block */
987 My_Connections = (CONNECTION *)ptr;
989 /* Initialize new items */
990 for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
993 /* Adjust new pool size */
994 Pool_Size = new_size;
997 /* Client-Struktur initialisieren */
998 c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false );
1000 Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
1001 Simple_Message( new_sock, "ERROR :Internal error" );
1006 /* Verbindung registrieren */
1007 Init_Conn_Struct( idx );
1008 My_Connections[idx].sock = new_sock;
1009 My_Connections[idx].addr = new_addr;
1011 /* Neuen Socket registrieren */
1012 if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
1013 Simple_Message( new_sock, "ERROR :Internal error" );
1014 Conn_Close( idx, "io_event_create() failed", NULL, false );
1018 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 );
1020 /* Hostnamen ermitteln */
1021 strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
1022 Client_SetHostname( c, My_Connections[idx].host );
1024 Resolve_Addr(&My_Connections[idx].res_stat, &new_addr,
1025 My_Connections[idx].sock, cb_Read_Resolver_Result);
1027 /* Penalty-Zeit setzen */
1028 Conn_SetPenalty( idx, 4 );
1030 } /* New_Connection */
1034 Socket2Index( int Sock )
1036 /* zum Socket passende Connection suchen */
1040 assert( Sock > NONE );
1042 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
1044 if( idx >= Pool_Size )
1046 /* die Connection wurde vermutlich (wegen eines
1047 * Fehlers) bereits wieder abgebaut ... */
1049 Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
1054 } /* Socket2Index */
1058 Read_Request( CONN_ID Idx )
1060 /* Daten von Socket einlesen und entsprechend behandeln.
1061 * Tritt ein Fehler auf, so wird der Socket geschlossen. */
1067 assert( Idx > NONE );
1068 assert( My_Connections[Idx].sock > NONE );
1071 if (( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) ||
1072 ( array_bytes(&My_Connections[Idx].zip.rbuf) >= ZREADBUFFER_LEN ))
1074 if ( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN )
1077 /* Der Lesepuffer ist voll */
1078 Log( LOG_ERR, "Receive buffer overflow (connection %d): %d bytes!", Idx,
1079 array_bytes(&My_Connections[Idx].rbuf));
1080 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1084 len = read( My_Connections[Idx].sock, readbuf, sizeof readbuf -1 );
1086 Log( LOG_INFO, "%s:%d (%s) is closing the connection ...",
1087 My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port),
1088 inet_ntoa( My_Connections[Idx].addr.sin_addr ));
1089 Conn_Close( Idx, "Socket closed!", "Client closed connection", false );
1094 if( errno == EAGAIN ) return;
1095 Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx,
1096 My_Connections[Idx].sock, strerror( errno ));
1097 Conn_Close( Idx, "Read error!", "Client closed connection", false );
1101 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1102 if (!array_catb( &My_Connections[Idx].zip.rbuf, readbuf, len)) {
1103 Log( LOG_ERR, "Could not append recieved data to zip input buffer (connn %d): %d bytes!", Idx, len );
1104 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1111 if (!array_cats( &My_Connections[Idx].rbuf, readbuf )) {
1112 Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
1113 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1117 /* Update connection statistics */
1118 My_Connections[Idx].bytes_in += len;
1120 /* Update timestamp of last data received if this connection is
1121 * registered as a user, server or service connection. Don't update
1122 * otherwise, so users have at least Conf_PongTimeout seconds time to
1123 * register with the IRC server -- see Check_Connections(). */
1124 c = Client_GetFromConn(Idx);
1125 if (c && (Client_Type(c) == CLIENT_USER
1126 || Client_Type(c) == CLIENT_SERVER
1127 || Client_Type(c) == CLIENT_SERVICE))
1128 My_Connections[Idx].lastdata = time(NULL);
1130 /* Look at the data in the (read-) buffer of this connection */
1132 } /* Read_Request */
1136 Handle_Buffer( CONN_ID Idx )
1138 /* Handle Data in Connections Read-Buffer.
1139 * Return true if a reuqest was handled, false otherwise (also returned on errors). */
1153 if( My_Connections[Idx].delaytime > time( NULL )) return result;
1155 /* unpack compressed data */
1156 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP ))
1157 if( ! Unzip_Buffer( Idx )) return false;
1160 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1163 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */
1166 /* A Complete Request end with CR+LF, see RFC 2812. */
1167 ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" );
1169 if( ptr ) delta = 2; /* complete request */
1172 /* Check for non-RFC-compliant request (only CR or LF)? Unfortunately,
1173 * there are quite a few clients that do this (incl. "mIRC" :-( */
1174 ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' );
1175 ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' );
1177 if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
1178 else if( ptr1 ) ptr = ptr1;
1179 else if( ptr2 ) ptr = ptr2;
1186 /* End of request found */
1189 len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
1191 if( len < 0 || len > ( COMMAND_LEN - 1 )) {
1192 /* Request must not exceed 512 chars (incl. CR+LF!), see
1193 * RFC 2812. Disconnect Client if this happens. */
1194 Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!",
1195 Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 );
1196 Conn_Close( Idx, NULL, "Request too long", true );
1200 if (len <= 2) { /* request was empty (only '\r\n') */
1201 array_moveleft(&My_Connections[Idx].rbuf, 1, delta); /* delta is either 1 or 2 */
1205 /* remember if stream is already compressed */
1206 old_z = My_Connections[Idx].options & CONN_ZIP;
1209 My_Connections[Idx].msg_in++;
1210 if (!Parse_Request(Idx, (char*)array_start(&My_Connections[Idx].rbuf) ))
1215 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1218 "Connection %d: %d bytes left in read buffer.",
1219 Idx, array_bytes(&My_Connections[Idx].rbuf));
1222 if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) &&
1223 ( array_bytes(&My_Connections[Idx].rbuf) > 0 ))
1225 /* The last Command activated Socket-Compression.
1226 * Data that was read after that needs to be copied to Unzip-buf
1227 * for decompression */
1228 if( array_bytes(&My_Connections[Idx].rbuf)> ZREADBUFFER_LEN ) {
1229 Log( LOG_ALERT, "Connection %d: No space left in unzip buf (need %u bytes)!",
1230 Idx, array_bytes(&My_Connections[Idx].rbuf ));
1233 if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
1236 array_trunc(&My_Connections[Idx].rbuf);
1238 Log( LOG_DEBUG, "Moved already received data (%u bytes) to uncompression buffer.",
1239 array_bytes(&My_Connections[Idx].zip.rbuf));
1246 } /* Handle_Buffer */
1250 Check_Connections( void )
1252 /* check if connections are alive. if not, play PING-PONG first.
1253 * if this doesn't help either, disconnect client. */
1257 for( i = 0; i < Pool_Size; i++ ) {
1258 if (My_Connections[i].sock < 0)
1261 c = Client_GetFromConn( i );
1262 if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE )))
1264 /* connected User, Server or Service */
1265 if( My_Connections[i].lastping > My_Connections[i].lastdata ) {
1266 /* we already sent a ping */
1267 if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) {
1270 Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
1272 Conn_Close( i, NULL, "Ping timeout", true );
1275 else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) {
1276 /* we need to sent a PING */
1278 Log( LOG_DEBUG, "Connection %d: sending PING ...", i );
1280 My_Connections[i].lastping = time( NULL );
1281 Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( )));
1286 /* The connection is not fully established yet, so
1287 * we don't do the PING-PONG game here but instead
1288 * disconnect the client after "a short time" if it's
1289 * still not registered. */
1291 if (My_Connections[i].lastdata <
1292 time(NULL) - Conf_PongTimeout) {
1295 "Unregistered connection %d timed out ...",
1298 Conn_Close(i, NULL, "Timeout", false);
1302 } /* Check_Connections */
1306 Check_Servers( void )
1308 /* Check if we can establish further server links */
1314 /* Search all connections, are there results from the resolver? */
1315 for( idx = 0; idx < Pool_Size; idx++ ) {
1316 if( My_Connections[idx].sock != SERVER_WAIT ) continue;
1319 if (Resolve_SUCCESS(&My_Connections[idx].res_stat))
1320 New_Server(Conf_GetServer( idx ), idx);
1323 /* Check all configured servers */
1324 for( i = 0; i < MAX_SERVERS; i++ ) {
1325 /* Valid outgoing server which isn't already connected or disabled? */
1326 if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
1327 ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
1330 /* Is there already a connection in this group? */
1331 if( Conf_Server[i].group > NONE ) {
1332 for (n = 0; n < MAX_SERVERS; n++) {
1333 if (n == i) continue;
1334 if ((Conf_Server[n].conn_id > NONE) &&
1335 (Conf_Server[n].group == Conf_Server[i].group))
1338 if (n < MAX_SERVERS) continue;
1341 /* Check last connect attempt? */
1342 time_now = time(NULL);
1343 if( Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1346 /* Okay, try to connect now */
1347 Conf_Server[i].lasttry = time_now;
1349 /* Search free connection structure */
1350 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
1351 if (idx >= Pool_Size) {
1352 Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!",
1357 Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
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 ));
1368 assert(Resolve_Getfd(&My_Connections[idx].res_stat) < 0);
1370 Resolve_Name(&My_Connections[idx].res_stat, Conf_Server[i].host, cb_Read_Resolver_Result);
1372 } /* Check_Servers */
1376 New_Server( int Server, CONN_ID Idx )
1378 /* Establish new server link */
1380 struct sockaddr_in new_addr;
1381 struct in_addr inaddr;
1385 assert( Server > NONE );
1386 assert( Idx > NONE );
1388 Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ", Conf_Server[Server].host,
1389 Conf_Server[Server].ip, Conf_Server[Server].port );
1391 #ifdef HAVE_INET_ATON
1392 if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
1394 memset( &inaddr, 0, sizeof( inaddr ));
1395 inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
1396 if( inaddr.s_addr == (unsigned)-1 )
1399 /* Can't convert IP address */
1400 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 );
1404 memset( &new_addr, 0, sizeof( new_addr ));
1405 new_addr.sin_family = AF_INET;
1406 new_addr.sin_addr = inaddr;
1407 new_addr.sin_port = htons( Conf_Server[Server].port );
1409 new_sock = socket( PF_INET, SOCK_STREAM, 0 );
1410 if ( new_sock < 0 ) {
1411 /* Can't create socket */
1412 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
1416 if( ! Init_Socket( new_sock )) return;
1418 res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
1419 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1420 /* Can't connect socket */
1421 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1426 /* Client-Struktur initialisieren */
1427 c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false );
1429 /* Can't create new client structure */
1430 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1435 Client_SetIntroducer( c, c );
1436 Client_SetToken( c, TOKEN_OUTBOUND );
1438 /* Register connection */
1439 My_Connections[Idx].sock = new_sock;
1440 My_Connections[Idx].addr = new_addr;
1441 strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
1443 /* Register new socket */
1444 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
1445 Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
1446 Conn_Close( Idx, "io_event_create() failed", NULL, false );
1451 Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
1453 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCONNECTING );
1456 Init_Conn_Struct( Idx );
1457 Conf_Server[Server].conn_id = NONE;
1462 Init_Conn_Struct( CONN_ID Idx )
1464 time_t now = time( NULL );
1465 /* Connection-Struktur initialisieren */
1467 memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
1468 My_Connections[Idx].sock = NONE;
1469 My_Connections[Idx].lastdata = now;
1470 My_Connections[Idx].lastprivmsg = now;
1471 Resolve_Init(&My_Connections[Idx].res_stat);
1472 } /* Init_Conn_Struct */
1476 Init_Socket( int Sock )
1478 /* Initialize socket (set options) */
1482 if (!io_setnonblock(Sock)) {
1483 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
1488 /* Don't block this port after socket shutdown */
1490 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
1492 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
1493 /* ignore this error */
1496 /* Set type of service (TOS) */
1497 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
1498 value = IPTOS_LOWDELAY;
1500 Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
1502 if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
1504 Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
1505 /* ignore this error */
1514 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
1516 /* Read result of resolver sub-process from pipe and update the
1517 * apropriate connection/client structure(s): hostname and/or
1518 * IDENT user name.*/
1525 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
1527 char readbuf[HOST_LEN + 1];
1531 Log( LOG_DEBUG, "Resolver: Got callback on fd %d, events %d", r_fd, events );
1534 /* Search associated connection ... */
1535 for( i = 0; i < Pool_Size; i++ ) {
1536 if(( My_Connections[i].sock != NONE )
1537 && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
1540 if( i >= Pool_Size ) {
1541 /* Ops, none found? Probably the connection has already
1542 * been closed!? We'll ignore that ... */
1545 Log( LOG_DEBUG, "Resolver: Got callback for unknown connection!?" );
1550 /* Read result from pipe */
1551 len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
1555 readbuf[len] = '\0';
1556 identptr = strchr(readbuf, '\n');
1557 assert(identptr != NULL);
1559 Log( LOG_CRIT, "Resolver: Got malformed result!");
1565 Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
1567 /* Okay, we got a complete result: this is a host name for outgoing
1568 * connections and a host name and IDENT user name (if enabled) for
1569 * incoming connections.*/
1570 if( My_Connections[i].sock > NONE ) {
1571 /* Incoming connection. Search client ... */
1572 c = Client_GetFromConn( i );
1573 assert( c != NULL );
1575 /* Only update client information of unregistered clients */
1576 if( Client_Type( c ) == CLIENT_UNKNOWN ) {
1577 strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
1578 Client_SetHostname( c, readbuf);
1582 Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, identptr);
1583 Client_SetUser( c, identptr, true );
1585 Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
1590 else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
1593 /* Outgoing connection (server link): set the IP address
1594 * so that we can connect to it in the main loop. */
1596 /* Search server ... */
1597 n = Conf_GetServer( i );
1600 strlcpy( Conf_Server[n].ip, readbuf, sizeof( Conf_Server[n].ip ));
1603 /* Reset penalty time */
1604 Conn_ResetPenalty( i );
1605 } /* cb_Read_Resolver_Result */
1609 Simple_Message( int Sock, char *Msg )
1611 char buf[COMMAND_LEN];
1612 /* Write "simple" message to socket, without using compression
1613 * or even the connection write buffers. Used e.g. for error
1614 * messages by New_Connection(). */
1615 assert( Sock > NONE );
1616 assert( Msg != NULL );
1618 strlcpy( buf, Msg, sizeof buf - 2);
1619 strlcat( buf, "\r\n", sizeof buf);
1620 (void)write( Sock, buf, strlen( buf ) );
1621 } /* Simple_Error */
1625 Count_Connections( struct sockaddr_in addr_in )
1630 for( i = 0; i < Pool_Size; i++ ) {
1631 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
1634 } /* Count_Connections */