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 1.184 2005/10/11 19:29:23 alex 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 /* Error while connecting? */
142 if ((res != 0) || (err != 0)) {
144 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
145 idx, strerror(errno));
148 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
149 My_Connections[idx].host,
150 Conf_Server[Conf_GetServer(idx)].port,
153 /* Clean up the CLIENT structure (to avoid silly log
154 * messages) and call Conn_Close() to do the rest. */
155 c = Client_GetFromConn(idx);
157 Client_DestroyNow(c);
159 Conn_Close(idx, "Can't connect!", NULL, false);
161 /* Set the timestamp of the last connect attempt */
162 Conf_UnsetServer(idx);
167 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
173 server_login(CONN_ID idx)
175 Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx,
176 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
178 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
179 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
181 /* Send PASS and SERVER command to peer */
182 Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
183 Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
188 cb_clientserver(int sock, short what)
190 CONN_ID idx = Socket2Index( sock );
193 Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!");
199 if (what & IO_WANTREAD)
202 if (what & IO_WANTWRITE)
210 /* Modul initialisieren: statische Strukturen "ausnullen". */
214 /* Speicher fuer Verbindungs-Pool anfordern */
215 Pool_Size = CONNECTION_POOL;
216 if( Conf_MaxConnections > 0 )
218 /* konfiguriertes Limit beachten */
219 if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
221 My_Connections = (CONNECTION *) calloc( Pool_Size, sizeof( CONNECTION ) );
222 if( ! My_Connections )
224 /* Speicher konnte nicht alloziert werden! */
225 Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
229 Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
232 array_free( &My_Listeners );
234 /* Groesster File-Descriptor fuer select() */
237 /* Connection-Struktur initialisieren */
238 for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
240 /* Global write counter */
248 /* Modul abmelden: alle noch offenen Connections
249 * schliessen und freigeben. */
254 Log( LOG_DEBUG, "Shutting down all connections ..." );
257 Conn_ExitListeners();
259 /* Sockets schliessen */
260 for( idx = 0; idx < Pool_Size; idx++ ) {
261 if( My_Connections[idx].sock > NONE ) {
262 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
263 "Server going down (restarting)":"Server going down", true );
268 free( My_Connections );
269 My_Connections = NULL;
271 io_library_shutdown();
276 ports_initlisteners(array *a, void (*func)(int,short))
278 unsigned int created = 0, len;
282 len = array_length(a, sizeof (UINT16));
283 port = array_start(a);
285 fd = NewListener( *port );
290 if (!io_event_create( fd, IO_WANTREAD, func )) {
291 Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!",
292 fd, (unsigned int) *port, strerror(errno));
306 Conn_InitListeners( void )
308 /* Initialize ports on which the server should accept connections */
310 unsigned int created;
312 if (!io_library_init(CONNECTION_POOL)) {
313 Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
317 created = ports_initlisteners(&Conf_ListenPorts, cb_listen);
320 } /* Conn_InitListeners */
324 Conn_ExitListeners( void )
326 /* Close down all listening sockets */
330 Rendezvous_UnregisterListeners( );
333 arraylen = array_length(&My_Listeners, sizeof (int));
334 Log( LOG_INFO, "Shutting down all listening sockets (%d total)...", arraylen );
335 fd = array_start(&My_Listeners);
341 Log( LOG_DEBUG, "Listening socket %d closed.", *fd );
345 array_free(&My_Listeners);
346 } /* Conn_ExitListeners */
349 /* return new listening port file descriptor or -1 on failure */
351 NewListener( const UINT16 Port )
353 /* Create new listening socket on specified port */
355 struct sockaddr_in addr;
356 struct in_addr inaddr;
359 char name[CLIENT_ID_LEN], *info;
362 /* Server-"Listen"-Socket initialisieren */
363 memset( &addr, 0, sizeof( addr ));
364 memset( &inaddr, 0, sizeof( inaddr ));
365 addr.sin_family = AF_INET;
366 addr.sin_port = htons( Port );
367 if( Conf_ListenAddress[0] )
369 #ifdef HAVE_INET_ATON
370 if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
372 inaddr.s_addr = inet_addr( Conf_ListenAddress );
373 if( inaddr.s_addr == (unsigned)-1 )
376 Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!",
377 Conf_ListenAddress, Port, Conf_ListenAddress );
381 else inaddr.s_addr = htonl( INADDR_ANY );
382 addr.sin_addr = inaddr;
384 sock = socket( PF_INET, SOCK_STREAM, 0);
386 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
390 if( ! Init_Socket( sock )) return -1;
392 if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 ) {
393 Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
398 if( listen( sock, 10 ) != 0 ) {
399 Log( LOG_CRIT, "Can't listen on socket: %s!", strerror( errno ));
404 /* keep fd in list so we can close it when ngircd restarts/shuts down */
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 while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart )) {
464 Rendezvous_Handler( );
467 /* Should the configuration be reloaded? */
468 if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
470 /* Check configured servers and established links */
472 Check_Connections( );
476 /* noch volle Lese-Buffer suchen */
477 for( i = 0; i < Pool_Size; i++ ) {
478 if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) &&
479 ( My_Connections[i].delaytime < t ))
481 /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
482 if (Handle_Buffer( i )) timeout = false;
486 /* noch volle Schreib-Puffer suchen */
487 for( i = 0; i < Pool_Size; i++ ) {
488 if ( My_Connections[i].sock <= NONE )
491 wdatalen = array_bytes(&My_Connections[i].wbuf);
494 if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 ))
499 /* Socket der Verbindung in Set aufnehmen */
500 io_event_add( My_Connections[i].sock, IO_WANTWRITE );
504 /* von welchen Sockets koennte gelesen werden? */
505 for (i = 0; i < Pool_Size; i++ ) {
506 if ( My_Connections[i].sock <= NONE )
509 if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
510 /* wait for completion of Resolver Sub-Process */
511 io_event_del( My_Connections[i].sock, IO_WANTREAD );
515 if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING ))
516 continue; /* wait for completion of connect() */
518 if( My_Connections[i].delaytime > t ) {
519 /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
520 io_event_del( My_Connections[i].sock, IO_WANTREAD );
523 io_event_add( My_Connections[i].sock, IO_WANTREAD );
526 /* (re-)set timeout - tv_sec/usec are undefined after io_dispatch() returns */
528 tv.tv_sec = timeout ? 1 : 0;
530 /* wait for activity */
531 i = io_dispatch( &tv );
532 if (i == -1 && errno != EINTR ) {
533 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno));
534 Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
539 if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
540 else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
545 * Write a text string into the socket of a connection.
546 * This function automatically appends CR+LF to the string and validates that
547 * the result is a valid IRC message (oversized messages are shortened, for
548 * example). Then it calls the Conn_Write() function to do the actual sending.
549 * @param Idx Index fo the connection.
550 * @param Format Format string, see printf().
551 * @return true on success, false otherwise.
555 Conn_WriteStr( CONN_ID Idx, char *Format, ... )
558 Conn_WriteStr( Idx, Format, va_alist )
564 char buffer[COMMAND_LEN];
568 assert( Idx > NONE );
569 assert( Format != NULL );
572 va_start( ap, Format );
576 if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
578 * The string that should be written to the socket is longer
579 * than the allowed size of COMMAND_LEN bytes (including both
580 * the CR and LF characters). This can be caused by the
581 * IRC_WriteXXX() functions when the prefix of this server had
582 * to be added to an already "quite long" command line which
583 * has been received from a regular IRC client, for example.
585 * We are not allowed to send such "oversized" messages to
586 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
587 * ("these messages SHALL NOT exceed 512 characters in length,
588 * counting all characters including the trailing CR-LF").
590 * So we have a big problem here: we should send more bytes
591 * to the network than we are allowed to and we don't know
592 * the originator (any more). The "old" behaviour of blaming
593 * the receiver ("next hop") is a bad idea (it could be just
594 * an other server only routing the message!), so the only
595 * option left is to shorten the string and to hope that the
596 * result is still somewhat useful ...
600 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
606 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
609 strlcat( buffer, "\r\n", sizeof( buffer ));
610 ok = Conn_Write( Idx, buffer, strlen( buffer ));
611 My_Connections[Idx].msg_out++;
615 } /* Conn_WriteStr */
619 Conn_Write( CONN_ID Idx, char *Data, unsigned int Len )
621 /* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
622 * der Client disconnectiert und false geliefert. */
624 assert( Idx > NONE );
625 assert( Data != NULL );
628 /* Ist der entsprechende Socket ueberhaupt noch offen? In einem
629 * "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
630 * ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
631 * In diesem Fall wird hier einfach ein Fehler geliefert. */
632 if( My_Connections[Idx].sock <= NONE )
635 Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
640 /* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
641 * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den
642 * Socket zu schreiben (u.a. wg. Komprimierung). */
643 if( array_bytes(&My_Connections[Idx].wbuf) >= WRITEBUFFER_LEN) {
644 /* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
645 * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
646 if( ! Handle_Write( Idx )) return false;
648 /* check again: if our writebuf is twice als large as the initial limit: Kill connection */
649 if( array_bytes(&My_Connections[Idx].wbuf) >= (WRITEBUFFER_LEN*2)) {
650 Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
651 Conn_Close( Idx, "Write buffer overflow!", NULL, false );
657 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
658 /* Daten komprimieren und in Puffer kopieren */
659 if( ! Zip_Buffer( Idx, Data, Len )) return false;
664 /* Daten in Puffer kopieren */
665 if (!array_catb( &My_Connections[Idx].wbuf, Data, Len ))
668 My_Connections[Idx].bytes_out += Len;
671 /* Adjust global write counter */
679 Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
681 /* Close connection. Open pipes of asyncronous resolver
682 * sub-processes are closed down. */
688 double in_z_k, out_z_k;
692 assert( Idx > NONE );
694 /* Is this link already shutting down? */
695 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
696 /* Conn_Close() has been called recursively for this link;
697 * probabe reason: Handle_Write() failed -- see below. */
699 Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
704 assert( My_Connections[Idx].sock > NONE );
706 /* Mark link as "closing" */
707 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
709 if( LogMsg ) txt = LogMsg;
711 if( ! txt ) txt = "Reason unknown";
713 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 ));
715 /* Search client, if any */
716 c = Client_GetFromConn( Idx );
718 /* Should the client be informed? */
721 /* Send statistics to client if registered as user: */
722 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
724 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
725 Client_ID(Client_ThisServer()), Client_ID(c),
727 (double)My_Connections[Idx].bytes_in / 1024,
728 (double)My_Connections[Idx].bytes_out / 1024);
732 /* Send ERROR to client (see RFC!) */
734 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
736 Conn_WriteStr(Idx, "ERROR :Closing connection.");
739 /* Try to write out the write buffer. Note: Handle_Write() eventually
740 * removes the CLIENT structure associated with this connection if an
741 * error occurs! So we have to re-check if there is still an valid
742 * CLIENT structure after calling Handle_Write() ...*/
743 (void)Handle_Write( Idx );
745 /* Search client, if any (re-check!) */
746 c = Client_GetFromConn( Idx );
748 /* Shut down socket */
749 if( ! io_close( My_Connections[Idx].sock ))
751 /* Oops, we can't close the socket!? This is ... ugly! */
752 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 ));
755 /* Mark socket as invalid: */
756 My_Connections[Idx].sock = NONE;
758 /* If there is still a client, unregister it now */
759 if( c ) Client_Destroy( c, LogMsg, FwdMsg, true );
761 /* Calculate statistics and log information */
762 in_k = (double)My_Connections[Idx].bytes_in / 1024;
763 out_k = (double)My_Connections[Idx].bytes_out / 1024;
765 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
766 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
767 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
768 in_p = (int)(( in_k * 100 ) / in_z_k );
769 out_p = (int)(( out_k * 100 ) / out_z_k );
770 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 );
775 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 );
778 /* cancel running resolver */
779 if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat)) {
780 Resolve_Shutdown(&My_Connections[Idx].res_stat);
783 /* Servers: Modify time of next connect attempt? */
784 Conf_UnsetServer( Idx );
787 /* Clean up zlib, if link was compressed */
788 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
789 inflateEnd( &My_Connections[Idx].zip.in );
790 deflateEnd( &My_Connections[Idx].zip.out );
791 array_free(&My_Connections[Idx].zip.rbuf);
792 array_free(&My_Connections[Idx].zip.wbuf);
796 array_free(&My_Connections[Idx].rbuf);
797 array_free(&My_Connections[Idx].wbuf);
798 /* Clean up connection structure (=free it) */
799 Init_Conn_Struct( Idx );
802 Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx );
808 Conn_SyncServerStruct( void )
810 /* Synchronize server structures (connection IDs):
811 * connections <-> configuration */
817 for( i = 0; i < Pool_Size; i++ )
819 /* Established connection? */
820 if( My_Connections[i].sock <= NONE ) continue;
822 /* Server connection? */
823 client = Client_GetFromConn( i );
824 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
826 for( c = 0; c < MAX_SERVERS; c++ )
828 /* Configured server? */
829 if( ! Conf_Server[c].host[0] ) continue;
832 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
835 } /* SyncServerStruct */
839 Handle_Write( CONN_ID Idx )
841 /* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
844 unsigned int wdatalen;
846 assert( Idx > NONE );
847 if ( My_Connections[Idx].sock < 0 ) {
850 "Handle_Write() on closed socket, connection %d", Idx);
854 assert( My_Connections[Idx].sock > NONE );
857 Log(LOG_DEBUG, "Handle_Write() called for connection %d ...", Idx);
860 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
862 if (wdatalen == 0 && !array_bytes(&My_Connections[Idx].zip.wbuf)) {
863 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
867 /* write buffer empty, but not compression buffer?
868 * -> flush compression buffer! */
873 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
878 /* Zip_Flush() may have changed the write buffer ... */
879 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
881 len = write(My_Connections[Idx].sock,
882 array_start(&My_Connections[Idx].wbuf), wdatalen );
885 if (errno == EAGAIN || errno == EINTR)
888 Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
889 Idx, My_Connections[Idx].sock, strerror(errno));
890 Conn_Close(Idx, "Write error!", NULL, false);
894 /* move any data not yet written to beginning */
895 array_moveleft(&My_Connections[Idx].wbuf, 1, len);
902 New_Connection( int Sock )
904 /* Neue Client-Verbindung von Listen-Socket annehmen und
905 * CLIENT-Struktur anlegen. */
908 struct request_info req;
910 struct sockaddr_in new_addr;
911 int new_sock, new_sock_len;
917 assert( Sock > NONE );
918 /* Connection auf Listen-Socket annehmen */
919 new_sock_len = sizeof( new_addr );
920 new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len );
923 Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno ));
928 /* Validate socket using TCP Wrappers */
929 request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
931 if( ! hosts_access( &req ))
934 Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
935 Simple_Message( new_sock, "ERROR :Connection refused" );
941 /* Socket initialisieren */
942 Init_Socket( new_sock );
944 /* Check IP-based connection limit */
945 cnt = Count_Connections( new_addr );
946 if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
948 /* Access denied, too many connections from this IP address! */
949 Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt);
950 Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
955 /* Freie Connection-Struktur suchen */
956 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
957 if( idx >= Pool_Size )
959 new_size = Pool_Size + CONNECTION_POOL;
961 /* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden.
962 * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */
964 if( Conf_MaxConnections > 0 )
966 /* Es ist ein Limit konfiguriert */
967 if( Pool_Size >= Conf_MaxConnections )
969 /* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */
970 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
971 Simple_Message( new_sock, "ERROR :Connection limit reached" );
975 if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
977 if( new_size < Pool_Size )
979 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached -- overflow!", Pool_Size );
980 Simple_Message( new_sock, "ERROR :Connection limit reached" );
985 ptr = (POINTER *)realloc( My_Connections, sizeof( CONNECTION ) * new_size );
987 Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
988 Simple_Message( new_sock, "ERROR: Internal error" );
994 Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
997 /* Adjust pointer to new block */
998 My_Connections = (CONNECTION *)ptr;
1000 /* Initialize new items */
1001 for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
1004 /* Adjust new pool size */
1005 Pool_Size = new_size;
1008 /* Client-Struktur initialisieren */
1009 c = Client_NewLocal( idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false );
1011 Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
1012 Simple_Message( new_sock, "ERROR :Internal error" );
1017 /* Verbindung registrieren */
1018 Init_Conn_Struct( idx );
1019 My_Connections[idx].sock = new_sock;
1020 My_Connections[idx].addr = new_addr;
1022 /* Neuen Socket registrieren */
1023 if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
1024 Simple_Message( new_sock, "ERROR :Internal error" );
1025 Conn_Close( idx, "io_event_create() failed", NULL, false );
1029 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 );
1031 /* Hostnamen ermitteln */
1032 strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
1033 Client_SetHostname( c, My_Connections[idx].host );
1035 Resolve_Addr(&My_Connections[idx].res_stat, &new_addr,
1036 My_Connections[idx].sock, cb_Read_Resolver_Result);
1038 /* Penalty-Zeit setzen */
1039 Conn_SetPenalty( idx, 4 );
1041 } /* New_Connection */
1045 Socket2Index( int Sock )
1047 /* zum Socket passende Connection suchen */
1051 assert( Sock > NONE );
1053 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
1055 if( idx >= Pool_Size )
1057 /* die Connection wurde vermutlich (wegen eines
1058 * Fehlers) bereits wieder abgebaut ... */
1060 Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
1065 } /* Socket2Index */
1069 Read_Request( CONN_ID Idx )
1071 /* Daten von Socket einlesen und entsprechend behandeln.
1072 * Tritt ein Fehler auf, so wird der Socket geschlossen. */
1078 assert( Idx > NONE );
1079 assert( My_Connections[Idx].sock > NONE );
1082 if (( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) ||
1083 ( array_bytes(&My_Connections[Idx].zip.rbuf) >= ZREADBUFFER_LEN ))
1085 if ( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN )
1088 /* Der Lesepuffer ist voll */
1089 Log( LOG_ERR, "Receive buffer overflow (connection %d): %d bytes!", Idx,
1090 array_bytes(&My_Connections[Idx].rbuf));
1091 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1095 len = read( My_Connections[Idx].sock, readbuf, sizeof readbuf -1 );
1097 Log( LOG_INFO, "%s:%d (%s) is closing the connection ...",
1098 My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port),
1099 inet_ntoa( My_Connections[Idx].addr.sin_addr ));
1100 Conn_Close( Idx, "Socket closed!", "Client closed connection", false );
1105 if( errno == EAGAIN ) return;
1106 Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx,
1107 My_Connections[Idx].sock, strerror( errno ));
1108 Conn_Close( Idx, "Read error!", "Client closed connection", false );
1112 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1113 if (!array_catb( &My_Connections[Idx].zip.rbuf, readbuf, len)) {
1114 Log( LOG_ERR, "Could not append recieved data to zip input buffer (connn %d): %d bytes!", Idx, len );
1115 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1122 if (!array_cats( &My_Connections[Idx].rbuf, readbuf )) {
1123 Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
1124 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1128 /* Update connection statistics */
1129 My_Connections[Idx].bytes_in += len;
1131 /* Update timestamp of last data received if this connection is
1132 * registered as a user, server or service connection. Don't update
1133 * otherwise, so users have at least Conf_PongTimeout seconds time to
1134 * register with the IRC server -- see Check_Connections(). */
1135 c = Client_GetFromConn(Idx);
1136 if (c && (Client_Type(c) == CLIENT_USER
1137 || Client_Type(c) == CLIENT_SERVER
1138 || Client_Type(c) == CLIENT_SERVICE))
1139 My_Connections[Idx].lastdata = time(NULL);
1141 /* Look at the data in the (read-) buffer of this connection */
1143 } /* Read_Request */
1147 Handle_Buffer( CONN_ID Idx )
1149 /* Handle Data in Connections Read-Buffer.
1150 * Return true if a reuqest was handled, false otherwise (also returned on errors). */
1164 if( My_Connections[Idx].delaytime > time( NULL )) return result;
1166 /* unpack compressed data */
1167 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP ))
1168 if( ! Unzip_Buffer( Idx )) return false;
1171 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1174 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */
1177 /* A Complete Request end with CR+LF, see RFC 2812. */
1178 ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" );
1180 if( ptr ) delta = 2; /* complete request */
1183 /* Check for non-RFC-compliant request (only CR or LF)? Unfortunately,
1184 * there are quite a few clients that do this (incl. "mIRC" :-( */
1185 ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' );
1186 ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' );
1188 if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
1189 else if( ptr1 ) ptr = ptr1;
1190 else if( ptr2 ) ptr = ptr2;
1197 /* End of request found */
1200 len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
1202 if( len < 0 || len > ( COMMAND_LEN - 1 )) {
1203 /* Request must not exceed 512 chars (incl. CR+LF!), see
1204 * RFC 2812. Disconnect Client if this happens. */
1205 Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!",
1206 Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 );
1207 Conn_Close( Idx, NULL, "Request too long", true );
1211 if (len <= 2) { /* request was empty (only '\r\n') */
1212 array_moveleft(&My_Connections[Idx].rbuf, 1, delta); /* delta is either 1 or 2 */
1216 /* remember if stream is already compressed */
1217 old_z = My_Connections[Idx].options & CONN_ZIP;
1220 My_Connections[Idx].msg_in++;
1221 if (!Parse_Request(Idx, (char*)array_start(&My_Connections[Idx].rbuf) ))
1226 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1229 "Connection %d: %d bytes left in read buffer.",
1230 Idx, array_bytes(&My_Connections[Idx].rbuf));
1233 if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) &&
1234 ( array_bytes(&My_Connections[Idx].rbuf) > 0 ))
1236 /* The last Command activated Socket-Compression.
1237 * Data that was read after that needs to be copied to Unzip-buf
1238 * for decompression */
1239 if( array_bytes(&My_Connections[Idx].rbuf)> ZREADBUFFER_LEN ) {
1240 Log( LOG_ALERT, "Connection %d: No space left in unzip buf (need %u bytes)!",
1241 Idx, array_bytes(&My_Connections[Idx].rbuf ));
1244 if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
1247 array_trunc(&My_Connections[Idx].rbuf);
1249 Log( LOG_DEBUG, "Moved already received data (%u bytes) to uncompression buffer.",
1250 array_bytes(&My_Connections[Idx].zip.rbuf));
1257 } /* Handle_Buffer */
1261 Check_Connections( void )
1263 /* check if connections are alive. if not, play PING-PONG first.
1264 * if this doesn't help either, disconnect client. */
1268 for( i = 0; i < Pool_Size; i++ ) {
1269 if (My_Connections[i].sock < 0)
1272 c = Client_GetFromConn( i );
1273 if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE )))
1275 /* connected User, Server or Service */
1276 if( My_Connections[i].lastping > My_Connections[i].lastdata ) {
1277 /* we already sent a ping */
1278 if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) {
1281 Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
1283 Conn_Close( i, NULL, "Ping timeout", true );
1286 else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) {
1287 /* we need to sent a PING */
1289 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 /* The connection is not fully established yet, so
1298 * we don't do the PING-PONG game here but instead
1299 * disconnect the client after "a short time" if it's
1300 * still not registered. */
1302 if (My_Connections[i].lastdata <
1303 time(NULL) - Conf_PongTimeout) {
1306 "Unregistered connection %d timed out ...",
1309 Conn_Close(i, NULL, "Timeout", false);
1313 } /* Check_Connections */
1317 Check_Servers( void )
1319 /* Check if we can establish further server links */
1325 /* Search all connections, are there results from the resolver? */
1326 for( idx = 0; idx < Pool_Size; idx++ ) {
1327 if( My_Connections[idx].sock != SERVER_WAIT ) continue;
1330 if (Resolve_SUCCESS(&My_Connections[idx].res_stat))
1331 New_Server(Conf_GetServer( idx ), idx);
1334 /* Check all configured servers */
1335 for( i = 0; i < MAX_SERVERS; i++ ) {
1336 /* Valid outgoing server which isn't already connected or disabled? */
1337 if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
1338 ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
1341 /* Is there already a connection in this group? */
1342 if( Conf_Server[i].group > NONE ) {
1343 for (n = 0; n < MAX_SERVERS; n++) {
1344 if (n == i) continue;
1345 if ((Conf_Server[n].conn_id > NONE) &&
1346 (Conf_Server[n].group == Conf_Server[i].group))
1349 if (n < MAX_SERVERS) continue;
1352 /* Check last connect attempt? */
1353 time_now = time(NULL);
1354 if( Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1357 /* Okay, try to connect now */
1358 Conf_Server[i].lasttry = time_now;
1360 /* Search free connection structure */
1361 for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
1362 if (idx >= Pool_Size) {
1363 Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!",
1368 Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
1371 Init_Conn_Struct( idx );
1372 My_Connections[idx].sock = SERVER_WAIT;
1373 Conf_Server[i].conn_id = idx;
1375 /* Resolve Hostname. If this fails, try to use it as an IP address */
1376 strlcpy( Conf_Server[i].ip, Conf_Server[i].host, sizeof( Conf_Server[i].ip ));
1377 strlcpy( My_Connections[idx].host, Conf_Server[i].host, sizeof( My_Connections[idx].host ));
1379 assert(Resolve_Getfd(&My_Connections[idx].res_stat) < 0);
1381 Resolve_Name(&My_Connections[idx].res_stat, Conf_Server[i].host, cb_Read_Resolver_Result);
1383 } /* Check_Servers */
1387 New_Server( int Server, CONN_ID Idx )
1389 /* Establish new server link */
1391 struct sockaddr_in new_addr;
1392 struct in_addr inaddr;
1396 assert( Server > NONE );
1397 assert( Idx > NONE );
1399 Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ", Conf_Server[Server].host,
1400 Conf_Server[Server].ip, Conf_Server[Server].port );
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 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 );
1415 memset( &new_addr, 0, sizeof( new_addr ));
1416 new_addr.sin_family = AF_INET;
1417 new_addr.sin_addr = inaddr;
1418 new_addr.sin_port = htons( Conf_Server[Server].port );
1420 new_sock = socket( PF_INET, SOCK_STREAM, 0 );
1421 if ( new_sock < 0 ) {
1422 /* Can't create socket */
1423 Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
1427 if( ! Init_Socket( new_sock )) return;
1429 res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
1430 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1431 /* Can't connect socket */
1432 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1437 /* Client-Struktur initialisieren */
1438 c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false );
1440 /* Can't create new client structure */
1441 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1446 Client_SetIntroducer( c, c );
1447 Client_SetToken( c, TOKEN_OUTBOUND );
1449 /* Register connection */
1450 My_Connections[Idx].sock = new_sock;
1451 My_Connections[Idx].addr = new_addr;
1452 strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
1454 /* Register new socket */
1455 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
1456 Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
1457 Conn_Close( Idx, "io_event_create() failed", NULL, false );
1462 Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
1464 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCONNECTING );
1467 Init_Conn_Struct( Idx );
1468 Conf_Server[Server].conn_id = NONE;
1473 Init_Conn_Struct( CONN_ID Idx )
1475 time_t now = time( NULL );
1476 /* Connection-Struktur initialisieren */
1478 memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
1479 My_Connections[Idx].sock = NONE;
1480 My_Connections[Idx].lastdata = now;
1481 My_Connections[Idx].lastprivmsg = now;
1482 Resolve_Init(&My_Connections[Idx].res_stat);
1483 } /* Init_Conn_Struct */
1487 Init_Socket( int Sock )
1489 /* Initialize socket (set options) */
1493 if (!io_setnonblock(Sock)) {
1494 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
1499 /* Don't block this port after socket shutdown */
1501 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
1503 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
1504 /* ignore this error */
1507 /* Set type of service (TOS) */
1508 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
1509 value = IPTOS_LOWDELAY;
1511 Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
1513 if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
1515 Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
1516 /* ignore this error */
1525 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
1527 /* Read result of resolver sub-process from pipe and update the
1528 * apropriate connection/client structure(s): hostname and/or
1529 * IDENT user name.*/
1536 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
1538 char readbuf[HOST_LEN + 1];
1542 Log( LOG_DEBUG, "Resolver: Got callback on fd %d, events %d", r_fd, events );
1545 /* Search associated connection ... */
1546 for( i = 0; i < Pool_Size; i++ ) {
1547 if(( My_Connections[i].sock != NONE )
1548 && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
1551 if( i >= Pool_Size ) {
1552 /* Ops, none found? Probably the connection has already
1553 * been closed!? We'll ignore that ... */
1556 Log( LOG_DEBUG, "Resolver: Got callback for unknown connection!?" );
1561 /* Read result from pipe */
1562 len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
1566 readbuf[len] = '\0';
1567 identptr = strchr(readbuf, '\n');
1568 assert(identptr != NULL);
1570 Log( LOG_CRIT, "Resolver: Got malformed result!");
1576 Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
1578 /* Okay, we got a complete result: this is a host name for outgoing
1579 * connections and a host name and IDENT user name (if enabled) for
1580 * incoming connections.*/
1581 if( My_Connections[i].sock > NONE ) {
1582 /* Incoming connection. Search client ... */
1583 c = Client_GetFromConn( i );
1584 assert( c != NULL );
1586 /* Only update client information of unregistered clients */
1587 if( Client_Type( c ) == CLIENT_UNKNOWN ) {
1588 strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
1589 Client_SetHostname( c, readbuf);
1593 Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, identptr);
1594 Client_SetUser( c, identptr, true );
1596 Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
1601 else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
1604 /* Outgoing connection (server link): set the IP address
1605 * so that we can connect to it in the main loop. */
1607 /* Search server ... */
1608 n = Conf_GetServer( i );
1611 strlcpy( Conf_Server[n].ip, readbuf, sizeof( Conf_Server[n].ip ));
1614 /* Reset penalty time */
1615 Conn_ResetPenalty( i );
1616 } /* cb_Read_Resolver_Result */
1620 Simple_Message( int Sock, char *Msg )
1622 char buf[COMMAND_LEN];
1623 /* Write "simple" message to socket, without using compression
1624 * or even the connection write buffers. Used e.g. for error
1625 * messages by New_Connection(). */
1626 assert( Sock > NONE );
1627 assert( Msg != NULL );
1629 strlcpy( buf, Msg, sizeof buf - 2);
1630 strlcat( buf, "\r\n", sizeof buf);
1631 (void)write( Sock, buf, strlen( buf ) );
1632 } /* Simple_Error */
1636 Count_Connections( struct sockaddr_in addr_in )
1641 for( i = 0; i < Pool_Size; i++ ) {
1642 if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
1645 } /* Count_Connections */