2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2007 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 1.221 2008/02/26 22:04:17 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>
45 # include <stdint.h> /* e.g. for Mac OS X */
49 # include <tcpd.h> /* for TCP Wrappers */
64 #include "conn-func.h"
70 # include "rendezvous.h"
76 #define SERVER_WAIT (NONE - 1)
79 static bool Handle_Write PARAMS(( CONN_ID Idx ));
80 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
81 static int New_Connection PARAMS(( int Sock ));
82 static CONN_ID Socket2Index PARAMS(( int Sock ));
83 static void Read_Request PARAMS(( CONN_ID Idx ));
84 static bool Handle_Buffer PARAMS(( CONN_ID Idx ));
85 static void Check_Connections PARAMS(( void ));
86 static void Check_Servers PARAMS(( void ));
87 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
88 static bool Init_Socket PARAMS(( int Sock ));
89 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
90 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
91 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
93 static array My_Listeners;
94 static array My_ConnArray;
97 int allow_severity = LOG_INFO;
98 int deny_severity = LOG_ERR;
101 static void server_login PARAMS((CONN_ID idx));
103 static void cb_Read_Resolver_Result PARAMS(( int sock, UNUSED short what));
104 static void cb_Connect_to_Server PARAMS(( int sock, UNUSED short what));
105 static void cb_clientserver PARAMS((int sock, short what));
108 cb_listen(int sock, short irrelevant)
111 New_Connection( sock );
116 cb_connserver(int sock, UNUSED short what)
120 CONN_ID idx = Socket2Index( sock );
122 LogDebug("cb_connserver wants to write on unknown socket?!");
127 assert( what & IO_WANTWRITE);
129 /* connect() finished, get result. */
130 sock_len = sizeof( err );
131 res = getsockopt( My_Connections[idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len );
132 assert( sock_len == sizeof( err ));
134 /* Error while connecting? */
135 if ((res != 0) || (err != 0)) {
137 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
138 idx, strerror(errno));
141 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
142 My_Connections[idx].host,
143 Conf_Server[Conf_GetServer(idx)].port,
146 res = Conf_GetServer(idx);
149 Conn_Close(idx, "Can't connect!", NULL, false);
153 if (ng_ipaddr_af(&Conf_Server[res].dst_addr[0])) {
154 /* more addresses to try... */
155 New_Server(res, &Conf_Server[res].dst_addr[0]);
156 /* connection to dst_addr[0] in progress, remove this address... */
157 Conf_Server[res].dst_addr[0] = Conf_Server[res].dst_addr[1];
159 memset(&Conf_Server[res].dst_addr[1], 0, sizeof(&Conf_Server[res].dst_addr[1]));
164 res = Conf_GetServer(idx);
166 if (res >= 0) /* connect succeeded, remove all additional addresses */
167 memset(&Conf_Server[res].dst_addr, 0, sizeof(&Conf_Server[res].dst_addr));
168 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
174 server_login(CONN_ID idx)
176 Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx,
177 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
179 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
180 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
182 /* Send PASS and SERVER command to peer */
183 Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
184 Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
189 cb_clientserver(int sock, short what)
191 CONN_ID idx = Socket2Index( sock );
194 Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!");
200 if (what & IO_WANTREAD)
203 if (what & IO_WANTWRITE)
211 /* Modul initialisieren: statische Strukturen "ausnullen". */
215 /* Speicher fuer Verbindungs-Pool anfordern */
216 Pool_Size = CONNECTION_POOL;
217 if( Conf_MaxConnections > 0 )
219 /* konfiguriertes Limit beachten */
220 if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
223 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
224 Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
228 /* FIXME: My_Connetions/Pool_Size is needed by other parts of the
229 * code; remove them! */
230 My_Connections = (CONNECTION*) array_start(&My_ConnArray);
232 LogDebug("Allocated connection pool for %d items (%ld bytes).",
233 array_length(&My_ConnArray, sizeof( CONNECTION )), array_bytes(&My_ConnArray));
235 assert( array_length(&My_ConnArray, sizeof( CONNECTION )) >= (size_t) Pool_Size);
237 array_free( &My_Listeners );
239 /* Connection-Struktur initialisieren */
240 for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
242 /* Global write counter */
250 /* Modul abmelden: alle noch offenen Connections
251 * schliessen und freigeben. */
255 LogDebug("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 );
267 array_free(&My_ConnArray);
268 My_Connections = NULL;
270 io_library_shutdown();
275 ports_initlisteners(array *a, const char *listen_addr, void (*func)(int,short))
277 unsigned int created = 0;
282 len = array_length(a, sizeof (UINT16));
283 port = array_start(a);
285 fd = NewListener(listen_addr, *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));
305 Conn_InitListeners( void )
307 /* Initialize ports on which the server should accept connections */
308 unsigned int created = 0;
309 char *copy, *listen_addr;
311 if (!io_library_init(CONNECTION_POOL)) {
312 Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
316 assert(Conf_ListenAddress);
318 /* can't use Conf_ListenAddress directly, see below */
319 copy = strdup(Conf_ListenAddress);
321 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress, strerror(errno));
324 listen_addr = strtok(copy, ",");
326 while (listen_addr) {
327 ngt_TrimStr(listen_addr);
329 created += ports_initlisteners(&Conf_ListenPorts, listen_addr, cb_listen);
331 listen_addr = strtok(NULL, ",");
335 * can't free() Conf_ListenAddress here. On /REHASH, if the config file
336 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
337 * Instead, free() takes place in conf.c, before the config file
342 } /* Conn_InitListeners */
346 Conn_ExitListeners( void )
348 /* Close down all listening sockets */
352 Rendezvous_UnregisterListeners( );
355 arraylen = array_length(&My_Listeners, sizeof (int));
356 Log( LOG_INFO, "Shutting down all listening sockets (%d total)...", arraylen );
357 fd = array_start(&My_Listeners);
362 LogDebug("Listening socket %d closed.", *fd );
365 array_free(&My_Listeners);
366 } /* Conn_ExitListeners */
370 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
374 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
376 assert(listen_addrstr);
377 Log(LOG_CRIT, "Can't bind to [%s]:%u: can't convert ip address \"%s\"",
378 listen_addrstr, Port, listen_addrstr);
385 set_v6_only(int af, int sock)
387 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
393 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)))
394 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
402 /* return new listening port file descriptor or -1 on failure */
404 NewListener(const char *listen_addr, UINT16 Port)
406 /* Create new listening socket on specified port */
410 char name[CLIENT_ID_LEN], *info;
412 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
415 af = ng_ipaddr_af(&addr);
416 sock = socket(af, SOCK_STREAM, 0);
418 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af, strerror(errno));
422 set_v6_only(af, sock);
424 if (!Init_Socket(sock))
427 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
428 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s",
429 ng_ipaddr_tostr(&addr), Port, strerror(errno));
434 if( listen( sock, 10 ) != 0 ) {
435 Log( LOG_CRIT, "Can't listen on socket: %s!", strerror( errno ));
440 /* keep fd in list so we can close it when ngircd restarts/shuts down */
441 if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) {
442 Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno ));
447 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).", ng_ipaddr_tostr(&addr), Port, sock);
450 /* Get best server description text */
451 if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
454 /* Use server info string */
456 if( Conf_ServerInfo[0] == '[' )
458 /* Cut off leading hostname part in "[]" */
459 info = strchr( Conf_ServerInfo, ']' );
463 while( *info == ' ' ) info++;
466 if( ! info ) info = Conf_ServerInfo;
469 /* Add port number to description if non-standard */
471 snprintf(name, sizeof name, "%s (port %u)", info,
474 strlcpy(name, info, sizeof name);
476 /* Register service */
477 Rendezvous_Register( name, MDNS_TYPE, Port );
484 * "Main Loop": Loop until shutdown or restart is signalled.
485 * This function loops until a shutdown or restart of ngIRCd is signalled and
486 * calls io_dispatch() to check for readable and writable sockets every second.
487 * It checks for status changes on pending connections (e. g. when a hostname
488 * has been resolved), checks for "penalties" and timeouts, and handles the
495 unsigned int wdatalen;
499 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
503 Rendezvous_Handler();
506 /* Should the configuration be reloaded? */
507 if (NGIRCd_SignalRehash)
510 /* Check configured servers and established links */
514 /* Look for non-empty read buffers ... */
515 for (i = 0; i < Pool_Size; i++) {
516 if ((My_Connections[i].sock > NONE)
517 && (array_bytes(&My_Connections[i].rbuf) > 0)
518 && (My_Connections[i].delaytime < t)) {
519 /* ... and try to handle the received data */
524 /* Look for non-empty write buffers ... */
525 for (i = 0; i < Pool_Size; i++) {
526 if (My_Connections[i].sock <= NONE)
529 wdatalen = (unsigned int)array_bytes(&My_Connections[i].wbuf);
532 array_bytes(&My_Connections[i].zip.wbuf) > 0)
537 /* Set the "WANTWRITE" flag on this socket */
538 io_event_add(My_Connections[i].sock,
543 /* Check from which sockets we possibly could read ... */
544 for (i = 0; i < Pool_Size; i++) {
545 if (My_Connections[i].sock <= NONE)
548 if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
549 /* Wait for completion of resolver sub-process ... */
550 io_event_del(My_Connections[i].sock,
555 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
556 /* Wait for completion of connect() ... */
559 if (My_Connections[i].delaytime > t) {
560 /* There is a "penalty time" set: ignore socket! */
561 io_event_del(My_Connections[i].sock,
565 io_event_add(My_Connections[i].sock, IO_WANTREAD);
568 /* Set the timeout for reading from the network to 1 second,
569 * which is the granularity with witch we handle "penalty
570 * times" for example.
571 * Note: tv_sec/usec are undefined(!) after io_dispatch()
572 * returns, so we have to set it beforce each call to it! */
576 /* Wait for activity ... */
577 i = io_dispatch(&tv);
578 if (i == -1 && errno != EINTR) {
579 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
581 Log(LOG_ALERT, "%s exiting due to fatal errors!",
587 if (NGIRCd_SignalQuit)
588 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
589 else if (NGIRCd_SignalRestart)
590 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
595 * Write a text string into the socket of a connection.
596 * This function automatically appends CR+LF to the string and validates that
597 * the result is a valid IRC message (oversized messages are shortened, for
598 * example). Then it calls the Conn_Write() function to do the actual sending.
599 * @param Idx Index fo the connection.
600 * @param Format Format string, see printf().
601 * @return true on success, false otherwise.
605 Conn_WriteStr( CONN_ID Idx, char *Format, ... )
608 Conn_WriteStr( Idx, Format, va_alist )
614 char buffer[COMMAND_LEN];
619 assert( Idx > NONE );
620 assert( Format != NULL );
623 va_start( ap, Format );
627 if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
629 * The string that should be written to the socket is longer
630 * than the allowed size of COMMAND_LEN bytes (including both
631 * the CR and LF characters). This can be caused by the
632 * IRC_WriteXXX() functions when the prefix of this server had
633 * to be added to an already "quite long" command line which
634 * has been received from a regular IRC client, for example.
636 * We are not allowed to send such "oversized" messages to
637 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
638 * ("these messages SHALL NOT exceed 512 characters in length,
639 * counting all characters including the trailing CR-LF").
641 * So we have a big problem here: we should send more bytes
642 * to the network than we are allowed to and we don't know
643 * the originator (any more). The "old" behaviour of blaming
644 * the receiver ("next hop") is a bad idea (it could be just
645 * an other server only routing the message!), so the only
646 * option left is to shorten the string and to hope that the
647 * result is still somewhat useful ...
651 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
657 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
660 len = strlcat( buffer, "\r\n", sizeof( buffer ));
661 ok = Conn_Write(Idx, buffer, len);
662 My_Connections[Idx].msg_out++;
666 } /* Conn_WriteStr */
670 * Append Data to the outbound write buffer of a connection.
671 * @param Idx Index of the connection.
672 * @param Data pointer to the data.
673 * @param Len length of Data.
674 * @return true on success, false otherwise.
677 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
680 size_t writebuf_limit = WRITEBUFFER_LEN;
681 assert( Idx > NONE );
682 assert( Data != NULL );
685 c = Conn_GetClient(Idx);
688 /* Servers do get special write buffer limits, so they can generate
689 * all the messages that are required while peering. */
690 if (Client_Type(c) == CLIENT_SERVER)
691 writebuf_limit = WRITEBUFFER_SLINK_LEN;
693 /* Is the socket still open? A previous call to Conn_Write()
694 * may have closed the connection due to a fatal error.
695 * In this case it is sufficient to return an error, as well. */
696 if( My_Connections[Idx].sock <= NONE ) {
697 LogDebug("Skipped write on closed socket (connection %d).", Idx);
702 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
704 * Zip_Buffer() does all the dirty work for us: it flushes
705 * the (pre-)compression buffers if required and handles
706 * all error conditions. */
707 if (!Zip_Buffer(Idx, Data, Len))
713 /* Uncompressed link:
714 * Check if outbound buffer has enough space for the data. */
715 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
717 /* Buffer is full, flush it. Handle_Write deals with
718 * low-level errors, if any. */
719 if (!Handle_Write(Idx))
723 /* When the write buffer is still too big after flushing it,
724 * the connection will be killed. */
725 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
728 "Write buffer overflow (connection %d, size %lu byte)!",
730 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
731 Conn_Close(Idx, "Write buffer overflow!", NULL, false);
735 /* Copy data to write buffer */
736 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
739 My_Connections[Idx].bytes_out += Len;
742 /* Adjust global write counter */
750 Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
752 /* Close connection. Open pipes of asyncronous resolver
753 * sub-processes are closed down. */
760 double in_z_k, out_z_k;
764 assert( Idx > NONE );
766 /* Is this link already shutting down? */
767 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
768 /* Conn_Close() has been called recursively for this link;
769 * probabe reason: Handle_Write() failed -- see below. */
770 LogDebug("Recursive request to close connection: %d", Idx );
774 assert( My_Connections[Idx].sock > NONE );
776 /* Mark link as "closing" */
777 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
784 txt = "Reason unknown";
786 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
787 Log(LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx,
788 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
790 /* Search client, if any */
791 c = Conn_GetClient( Idx );
793 /* Should the client be informed? */
796 /* Send statistics to client if registered as user: */
797 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
799 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
800 Client_ID(Client_ThisServer()), Client_ID(c),
802 (double)My_Connections[Idx].bytes_in / 1024,
803 (double)My_Connections[Idx].bytes_out / 1024);
806 /* Send ERROR to client (see RFC!) */
808 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
810 Conn_WriteStr(Idx, "ERROR :Closing connection.");
813 /* Try to write out the write buffer. Note: Handle_Write() eventually
814 * removes the CLIENT structure associated with this connection if an
815 * error occurs! So we have to re-check if there is still an valid
816 * CLIENT structure after calling Handle_Write() ...*/
817 (void)Handle_Write( Idx );
819 /* Search client, if any (re-check!) */
820 c = Conn_GetClient( Idx );
822 /* Shut down socket */
823 if (! io_close(My_Connections[Idx].sock)) {
824 /* Oops, we can't close the socket!? This is ... ugly! */
826 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
827 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
828 port, strerror(errno));
831 /* Mark socket as invalid: */
832 My_Connections[Idx].sock = NONE;
834 /* If there is still a client, unregister it now */
836 Client_Destroy(c, LogMsg, FwdMsg, true);
838 /* Calculate statistics and log information */
839 in_k = (double)My_Connections[Idx].bytes_in / 1024;
840 out_k = (double)My_Connections[Idx].bytes_out / 1024;
842 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
843 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
844 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
845 /* Make sure that no division by zero can occur during
846 * the calculation of in_p and out_p: in_z_k and out_z_k
847 * are non-zero, that's guaranteed by the protocol until
848 * compression can be enabled. */
853 in_p = (int)(( in_k * 100 ) / in_z_k );
854 out_p = (int)(( out_k * 100 ) / out_z_k );
856 "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
857 Idx, My_Connections[Idx].host, port,
858 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
864 "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).",
865 Idx, My_Connections[Idx].host, port,
869 /* cancel running resolver */
870 if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat))
871 Resolve_Shutdown(&My_Connections[Idx].res_stat);
873 /* Servers: Modify time of next connect attempt? */
874 Conf_UnsetServer( Idx );
877 /* Clean up zlib, if link was compressed */
878 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
879 inflateEnd( &My_Connections[Idx].zip.in );
880 deflateEnd( &My_Connections[Idx].zip.out );
881 array_free(&My_Connections[Idx].zip.rbuf);
882 array_free(&My_Connections[Idx].zip.wbuf);
886 array_free(&My_Connections[Idx].rbuf);
887 array_free(&My_Connections[Idx].wbuf);
889 /* Clean up connection structure (=free it) */
890 Init_Conn_Struct( Idx );
892 LogDebug("Shutdown of connection %d completed.", Idx );
897 Conn_SyncServerStruct( void )
899 /* Synchronize server structures (connection IDs):
900 * connections <-> configuration */
906 for( i = 0; i < Pool_Size; i++ ) {
907 /* Established connection? */
908 if (My_Connections[i].sock < 0)
911 /* Server connection? */
912 client = Conn_GetClient( i );
913 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
915 for( c = 0; c < MAX_SERVERS; c++ )
917 /* Configured server? */
918 if( ! Conf_Server[c].host[0] ) continue;
921 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 )
922 Conf_Server[c].conn_id = i;
925 } /* SyncServerStruct */
929 * Send out data of write buffer; connect new sockets.
932 Handle_Write( CONN_ID Idx )
937 assert( Idx > NONE );
938 if ( My_Connections[Idx].sock < 0 ) {
939 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
942 assert( My_Connections[Idx].sock > NONE );
944 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
948 /* Write buffer is empty, so we try to flush the compression
949 * buffer and get some data to work with from there :-) */
953 /* Now the write buffer most probably has changed: */
954 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
959 /* Still no data, fine. */
960 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
965 ("Handle_Write() called for connection %d, %ld bytes pending ...",
968 len = write(My_Connections[Idx].sock,
969 array_start(&My_Connections[Idx].wbuf), wdatalen );
972 if (errno == EAGAIN || errno == EINTR)
975 Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
976 Idx, My_Connections[Idx].sock, strerror(errno));
977 Conn_Close(Idx, "Write error!", NULL, false);
981 /* move any data not yet written to beginning */
982 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
989 Count_Connections(ng_ipaddr_t *a)
994 for (i = 0; i < Pool_Size; i++) {
995 if (My_Connections[i].sock <= NONE)
997 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1001 } /* Count_Connections */
1005 New_Connection( int Sock )
1007 /* Neue Client-Verbindung von Listen-Socket annehmen und
1008 * CLIENT-Struktur anlegen. */
1011 struct request_info req;
1013 ng_ipaddr_t new_addr;
1014 char ip_str[NG_INET_ADDRSTRLEN];
1015 int new_sock, new_sock_len, new_Pool_Size;
1019 assert( Sock > NONE );
1020 /* Connection auf Listen-Socket annehmen */
1021 new_sock_len = (int)sizeof(new_addr);
1023 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1024 (socklen_t *)&new_sock_len);
1026 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1030 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1031 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1032 Simple_Message(new_sock, "ERROR :Internal Server Error");
1037 /* Validate socket using TCP Wrappers */
1038 request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
1040 if (!hosts_access(&req)) {
1041 Log (deny_severity, "Refused connection from %s (by TCP Wrappers)!", ip_str);
1042 Simple_Message( new_sock, "ERROR :Connection refused" );
1048 /* Socket initialisieren */
1049 if (!Init_Socket( new_sock ))
1052 /* Check IP-based connection limit */
1053 cnt = Count_Connections(&new_addr);
1054 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1055 /* Access denied, too many connections from this IP address! */
1056 Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", ip_str, cnt);
1057 Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
1062 if( new_sock >= Pool_Size ) {
1063 new_Pool_Size = new_sock + 1;
1064 /* No free Connection Structures, check if we may accept further connections */
1065 if ((( Conf_MaxConnections > 0) && Pool_Size >= Conf_MaxConnections) ||
1066 (new_Pool_Size < Pool_Size))
1068 Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
1069 Simple_Message( new_sock, "ERROR :Connection limit reached" );
1074 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
1075 (size_t)new_sock)) {
1076 Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
1077 Simple_Message( new_sock, "ERROR: Internal error" );
1081 LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
1082 new_sock, array_length(&My_ConnArray, sizeof(CONNECTION)), array_bytes(&My_ConnArray));
1084 /* Adjust pointer to new block */
1085 My_Connections = array_start(&My_ConnArray);
1086 while (Pool_Size < new_Pool_Size)
1087 Init_Conn_Struct(Pool_Size++);
1090 /* register callback */
1091 if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
1092 Log(LOG_ALERT, "Can't accept connection: io_event_create failed!");
1093 Simple_Message(new_sock, "ERROR :Internal error");
1098 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWN, false );
1100 Log(LOG_ALERT, "Can't accept connection: can't create client structure!");
1101 Simple_Message(new_sock, "ERROR :Internal error");
1106 Init_Conn_Struct( new_sock );
1107 My_Connections[new_sock].sock = new_sock;
1108 My_Connections[new_sock].addr = new_addr;
1109 My_Connections[new_sock].client = c;
1111 Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", new_sock,
1112 ip_str, ng_ipaddr_getport(&new_addr), Sock);
1114 /* Hostnamen ermitteln */
1115 strlcpy(My_Connections[new_sock].host, ip_str, sizeof(My_Connections[new_sock].host));
1117 Client_SetHostname(c, My_Connections[new_sock].host);
1120 Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
1121 My_Connections[new_sock].sock, cb_Read_Resolver_Result);
1123 Conn_SetPenalty(new_sock, 4);
1125 } /* New_Connection */
1129 Socket2Index( int Sock )
1131 /* zum Socket passende Connection suchen */
1133 assert( Sock >= 0 );
1135 if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
1136 /* die Connection wurde vermutlich (wegen eines
1137 * Fehlers) bereits wieder abgebaut ... */
1138 LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
1142 } /* Socket2Index */
1146 * Read data from the network to the read buffer. If an error occures,
1147 * the socket of this connection will be shut down.
1150 Read_Request( CONN_ID Idx )
1153 char readbuf[READBUFFER_LEN];
1155 assert( Idx > NONE );
1156 assert( My_Connections[Idx].sock > NONE );
1159 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1160 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1162 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1165 /* Read buffer is full */
1167 "Receive buffer overflow (connection %d): %d bytes!",
1168 Idx, array_bytes(&My_Connections[Idx].rbuf));
1169 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1173 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1175 Log(LOG_INFO, "%s:%u (%s) is closing the connection ...",
1176 My_Connections[Idx].host,
1177 (unsigned int) ng_ipaddr_getport(&My_Connections[Idx].addr),
1178 ng_ipaddr_tostr(&My_Connections[Idx].addr));
1180 "Socket closed!", "Client closed connection",
1186 if( errno == EAGAIN ) return;
1187 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1188 Idx, My_Connections[Idx].sock, strerror(errno));
1189 Conn_Close(Idx, "Read error!", "Client closed connection",
1194 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1195 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1198 "Could not append recieved data to zip input buffer (connn %d): %d bytes!",
1200 Conn_Close(Idx, "Receive buffer overflow!", NULL,
1207 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1208 Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
1209 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1213 /* Update connection statistics */
1214 My_Connections[Idx].bytes_in += len;
1216 /* Update timestamp of last data received if this connection is
1217 * registered as a user, server or service connection. Don't update
1218 * otherwise, so users have at least Conf_PongTimeout seconds time to
1219 * register with the IRC server -- see Check_Connections().
1220 * Set "lastping", too, so we can handle time shifts backwards ... */
1221 c = Conn_GetClient(Idx);
1222 if (c && (Client_Type(c) == CLIENT_USER
1223 || Client_Type(c) == CLIENT_SERVER
1224 || Client_Type(c) == CLIENT_SERVICE)) {
1225 My_Connections[Idx].lastdata = time(NULL);
1226 My_Connections[Idx].lastping = My_Connections[Idx].lastdata;
1229 /* Look at the data in the (read-) buffer of this connection */
1231 } /* Read_Request */
1235 * Handle data in connection read-buffer.
1236 * @return true if a reuqest was handled, false otherwise (and on errors).
1239 Handle_Buffer(CONN_ID Idx)
1252 starttime = time(NULL);
1256 if (My_Connections[Idx].delaytime > starttime)
1259 /* Unpack compressed data, if compression is in use */
1260 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1261 if (!Unzip_Buffer(Idx))
1266 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1269 /* Make sure that the buffer is NULL terminated */
1270 if (!array_cat0_temporary(&My_Connections[Idx].rbuf))
1273 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1274 * "IRC messages are always lines of characters terminated
1275 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1277 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1281 /* Check for non-RFC-compliant request (only CR or
1282 * LF)? Unfortunately, there are quite a few clients
1283 * out there that do this -- incl. "mIRC" :-( */
1285 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1286 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1288 ptr = ptr1 > ptr2 ? ptr2 : ptr1;
1299 /* Complete (=line terminated) request found, handle it! */
1302 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1304 if (len > (COMMAND_LEN - 1)) {
1305 /* Request must not exceed 512 chars (incl. CR+LF!),
1306 * see RFC 2812. Disconnect Client if this happens. */
1308 "Request too long (connection %d): %d bytes (max. %d expected)!",
1309 Idx, array_bytes(&My_Connections[Idx].rbuf),
1311 Conn_Close(Idx, NULL, "Request too long", true);
1316 /* Request is empty (only '\r\n', '\r' or '\n');
1317 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1318 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1323 /* remember if stream is already compressed */
1324 old_z = My_Connections[Idx].options & CONN_ZIP;
1327 My_Connections[Idx].msg_in++;
1329 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1334 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1335 LogDebug("Connection %d: %d bytes left in read buffer.",
1336 Idx, array_bytes(&My_Connections[Idx].rbuf));
1338 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1339 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1340 /* The last command activated socket compression.
1341 * Data that was read after that needs to be copied
1342 * to the unzip buffer for decompression: */
1344 (&My_Connections[Idx].zip.rbuf,
1345 &My_Connections[Idx].rbuf))
1348 array_trunc(&My_Connections[Idx].rbuf);
1350 ("Moved already received data (%u bytes) to uncompression buffer.",
1351 array_bytes(&My_Connections[Idx].zip.rbuf));
1356 } /* Handle_Buffer */
1360 Check_Connections(void)
1362 /* check if connections are alive. if not, play PING-PONG first.
1363 * if this doesn't help either, disconnect client. */
1367 for (i = 0; i < Pool_Size; i++) {
1368 if (My_Connections[i].sock < 0)
1371 c = Conn_GetClient(i);
1372 if (c && ((Client_Type(c) == CLIENT_USER)
1373 || (Client_Type(c) == CLIENT_SERVER)
1374 || (Client_Type(c) == CLIENT_SERVICE))) {
1375 /* connected User, Server or Service */
1376 if (My_Connections[i].lastping >
1377 My_Connections[i].lastdata) {
1378 /* We already sent a ping */
1379 if (My_Connections[i].lastping <
1380 time(NULL) - Conf_PongTimeout) {
1383 ("Connection %d: Ping timeout: %d seconds.",
1384 i, Conf_PongTimeout);
1385 Conn_Close(i, NULL, "Ping timeout",
1388 } else if (My_Connections[i].lastdata <
1389 time(NULL) - Conf_PingTimeout) {
1390 /* We need to send a PING ... */
1391 LogDebug("Connection %d: sending PING ...", i);
1392 My_Connections[i].lastping = time(NULL);
1393 Conn_WriteStr(i, "PING :%s",
1394 Client_ID(Client_ThisServer()));
1397 /* The connection is not fully established yet, so
1398 * we don't do the PING-PONG game here but instead
1399 * disconnect the client after "a short time" if it's
1400 * still not registered. */
1402 if (My_Connections[i].lastdata <
1403 time(NULL) - Conf_PongTimeout) {
1405 ("Unregistered connection %d timed out ...",
1407 Conn_Close(i, NULL, "Timeout", false);
1411 } /* Check_Connections */
1415 Check_Servers( void )
1417 /* Check if we can establish further server links */
1422 /* Check all configured servers */
1423 for( i = 0; i < MAX_SERVERS; i++ ) {
1424 /* Valid outgoing server which isn't already connected or disabled? */
1425 if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
1426 ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
1429 /* Is there already a connection in this group? */
1430 if( Conf_Server[i].group > NONE ) {
1431 for (n = 0; n < MAX_SERVERS; n++) {
1432 if (n == i) continue;
1433 if ((Conf_Server[n].conn_id != NONE) &&
1434 (Conf_Server[n].group == Conf_Server[i].group))
1437 if (n < MAX_SERVERS) continue;
1440 /* Check last connect attempt? */
1441 time_now = time(NULL);
1442 if( Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1445 /* Okay, try to connect now */
1446 Conf_Server[i].lasttry = time_now;
1447 Conf_Server[i].conn_id = SERVER_WAIT;
1448 assert(Resolve_Getfd(&Conf_Server[i].res_stat) < 0);
1449 Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host, cb_Connect_to_Server);
1451 } /* Check_Servers */
1455 New_Server( int Server , ng_ipaddr_t *dest)
1457 /* Establish new server link */
1458 char ip_str[NG_INET_ADDRSTRLEN];
1459 int af_dest, res, new_sock;
1462 assert( Server > NONE );
1464 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1465 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1469 Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ",
1470 Conf_Server[Server].host, ip_str, Conf_Server[Server].port );
1472 af_dest = ng_ipaddr_af(dest);
1473 new_sock = socket(af_dest, SOCK_STREAM, 0);
1475 Log( LOG_CRIT, "Can't create socket (af %d) : %s!", af_dest, strerror( errno ));
1479 if (!Init_Socket(new_sock))
1482 /* is a bind address configured? */
1483 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1484 /* if yes, bind now. If it fails, warn and let connect() pick a source address */
1485 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1486 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1488 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1489 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str, strerror(errno));
1491 ng_ipaddr_setport(dest, Conf_Server[Server].port);
1492 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
1493 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1494 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1499 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
1501 "Cannot allocate memory for server connection (socket %d)",
1507 My_Connections = array_start(&My_ConnArray);
1509 assert(My_Connections[new_sock].sock <= 0);
1511 Init_Conn_Struct(new_sock);
1513 ng_ipaddr_tostr_r(dest, ip_str);
1514 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
1516 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1521 Client_SetIntroducer( c, c );
1522 Client_SetToken( c, TOKEN_OUTBOUND );
1524 /* Register connection */
1525 Conf_Server[Server].conn_id = new_sock;
1526 My_Connections[new_sock].sock = new_sock;
1527 My_Connections[new_sock].addr = *dest;
1528 My_Connections[new_sock].client = c;
1529 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
1530 sizeof(My_Connections[new_sock].host ));
1532 /* Register new socket */
1533 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
1534 Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
1535 Conn_Close( new_sock, "io_event_create() failed", NULL, false );
1536 Init_Conn_Struct( new_sock );
1537 Conf_Server[Server].conn_id = NONE;
1540 LogDebug("Registered new connection %d on socket %d.",
1541 new_sock, My_Connections[new_sock].sock );
1542 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
1547 * Initialize connection structure.
1550 Init_Conn_Struct(CONN_ID Idx)
1552 time_t now = time(NULL);
1554 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
1555 My_Connections[Idx].sock = -1;
1556 My_Connections[Idx].signon = now;
1557 My_Connections[Idx].lastdata = now;
1558 My_Connections[Idx].lastprivmsg = now;
1559 Resolve_Init(&My_Connections[Idx].res_stat);
1560 } /* Init_Conn_Struct */
1564 Init_Socket( int Sock )
1566 /* Initialize socket (set options) */
1570 if (!io_setnonblock(Sock)) {
1571 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
1576 /* Don't block this port after socket shutdown */
1578 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
1580 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
1581 /* ignore this error */
1584 /* Set type of service (TOS) */
1585 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
1586 value = IPTOS_LOWDELAY;
1587 LogDebug("Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
1588 if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
1590 Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
1591 /* ignore this error */
1601 cb_Connect_to_Server(int fd, UNUSED short events)
1603 /* Read result of resolver sub-process from pipe and start connection */
1606 ng_ipaddr_t dest_addrs[4]; /* we can handle at most 3; but we read up to
1607 four so we can log the 'more than we can handle'
1610 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
1612 for (i=0; i < MAX_SERVERS; i++) {
1613 if (Resolve_Getfd(&Conf_Server[i].res_stat) == fd )
1617 if( i >= MAX_SERVERS) {
1618 /* Ops, no matching server found?! */
1620 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
1624 /* Read result from pipe */
1625 len = Resolve_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
1629 assert((len % sizeof(ng_ipaddr_t)) == 0);
1631 LogDebug("Got result from resolver: %u structs (%u bytes).", len/sizeof(ng_ipaddr_t), len);
1633 memset(&Conf_Server[i].dst_addr, 0, sizeof(&Conf_Server[i].dst_addr));
1634 if (len > sizeof(ng_ipaddr_t)) {
1635 /* more than one address for this hostname, remember them
1636 * in case first address is unreachable/not available */
1637 len -= sizeof(ng_ipaddr_t);
1638 if (len > sizeof(&Conf_Server[i].dst_addr)) {
1639 len = sizeof(&Conf_Server[i].dst_addr);
1640 Log(LOG_NOTICE, "Notice: Resolver returned more IP Addresses for host than we can handle,"
1641 " additional addresses dropped");
1643 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
1646 New_Server(i, dest_addrs);
1647 } /* cb_Read_Forward_Lookup */
1651 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
1653 /* Read result of resolver sub-process from pipe and update the
1654 * apropriate connection/client structure(s): hostname and/or
1655 * IDENT user name.*/
1662 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
1664 char readbuf[HOST_LEN + 1];
1667 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
1669 /* Search associated connection ... */
1670 for( i = 0; i < Pool_Size; i++ ) {
1671 if(( My_Connections[i].sock != NONE )
1672 && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
1675 if( i >= Pool_Size ) {
1676 /* Ops, none found? Probably the connection has already
1677 * been closed!? We'll ignore that ... */
1679 LogDebug("Resolver: Got callback for unknown connection!?");
1683 /* Read result from pipe */
1684 len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
1688 readbuf[len] = '\0';
1689 identptr = strchr(readbuf, '\n');
1690 assert(identptr != NULL);
1692 Log( LOG_CRIT, "Resolver: Got malformed result!");
1697 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
1698 /* Okay, we got a complete result: this is a host name for outgoing
1699 * connections and a host name and IDENT user name (if enabled) for
1700 * incoming connections.*/
1701 assert ( My_Connections[i].sock >= 0 );
1702 /* Incoming connection. Search client ... */
1703 c = Conn_GetClient( i );
1704 assert( c != NULL );
1706 /* Only update client information of unregistered clients */
1707 if( Client_Type( c ) == CLIENT_UNKNOWN ) {
1708 strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
1709 Client_SetHostname( c, readbuf);
1713 Log(LOG_INFO, "IDENT lookup for connection %d: \"%s\".", i, identptr);
1714 Client_SetUser(c, identptr, true);
1716 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
1721 else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
1723 /* Reset penalty time */
1724 Conn_ResetPenalty( i );
1725 } /* cb_Read_Resolver_Result */
1729 Simple_Message( int Sock, const char *Msg )
1731 char buf[COMMAND_LEN];
1733 /* Write "simple" message to socket, without using compression
1734 * or even the connection write buffers. Used e.g. for error
1735 * messages by New_Connection(). */
1736 assert( Sock > NONE );
1737 assert( Msg != NULL );
1739 strlcpy( buf, Msg, sizeof buf - 2);
1740 len = strlcat( buf, "\r\n", sizeof buf);
1741 (void)write(Sock, buf, len);
1742 } /* Simple_Error */
1746 Conn_GetClient( CONN_ID Idx )
1748 /* return Client-Structure that belongs to the local Connection Idx.
1749 * If none is found, return NULL.
1754 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
1758 return c ? c->client : NULL;