2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2009 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
33 #include <sys/socket.h>
35 #include <sys/types.h>
37 #include <netinet/in.h>
39 #ifdef HAVE_NETINET_IP_H
40 # include <netinet/ip.h>
44 # include <stdint.h> /* e.g. for Mac OS X */
48 # include <tcpd.h> /* for TCP Wrappers */
64 #include "conn-func.h"
70 # include "rendezvous.h"
76 #define SERVER_WAIT (NONE - 1)
78 #define MAX_COMMANDS 3
79 #define MAX_COMMANDS_SERVER 10
82 static bool Handle_Write PARAMS(( CONN_ID Idx ));
83 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
84 static int New_Connection PARAMS(( int Sock ));
85 static CONN_ID Socket2Index PARAMS(( int Sock ));
86 static void Read_Request PARAMS(( CONN_ID Idx ));
87 static unsigned int Handle_Buffer PARAMS(( CONN_ID Idx ));
88 static void Check_Connections PARAMS(( void ));
89 static void Check_Servers PARAMS(( void ));
90 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
91 static bool Init_Socket PARAMS(( int Sock ));
92 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
93 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
94 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
96 static array My_Listeners;
97 static array My_ConnArray;
98 static size_t NumConnections;
101 int allow_severity = LOG_INFO;
102 int deny_severity = LOG_ERR;
105 static void server_login PARAMS((CONN_ID idx));
108 extern struct SSLOptions Conf_SSLOptions;
109 static void cb_connserver_login_ssl PARAMS((int sock, short what));
110 static void cb_clientserver_ssl PARAMS((int sock, short what));
112 static void cb_Read_Resolver_Result PARAMS((int sock, UNUSED short what));
113 static void cb_Connect_to_Server PARAMS((int sock, UNUSED short what));
114 static void cb_clientserver PARAMS((int sock, short what));
117 cb_listen(int sock, short irrelevant)
120 if (New_Connection( sock ) >= 0)
122 LogDebug("Total number of connections now %ld.", NumConnections);
128 cb_listen_ssl(int sock, short irrelevant)
133 fd = New_Connection(sock);
138 LogDebug("Total number of connections now %ld.", NumConnections);
139 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
145 cb_connserver(int sock, UNUSED short what)
147 int res, err, server;
149 CONN_ID idx = Socket2Index( sock );
152 LogDebug("cb_connserver wants to write on unknown socket?!");
157 assert(what & IO_WANTWRITE);
159 /* Make sure that the server is still configured; it could have been
160 * removed in the meantime! */
161 server = Conf_GetServer(idx);
163 Log(LOG_ERR, "Connection on socket %d to \"%s\" aborted!",
164 sock, My_Connections[idx].host);
165 Conn_Close(idx, "Connection aborted!", NULL, false);
169 /* connect() finished, get result. */
170 sock_len = (socklen_t)sizeof(err);
171 res = getsockopt(My_Connections[idx].sock, SOL_SOCKET, SO_ERROR,
173 assert(sock_len == sizeof(err));
175 /* Error while connecting? */
176 if ((res != 0) || (err != 0)) {
178 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
179 idx, strerror(errno));
182 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
183 My_Connections[idx].host, Conf_Server[server].port,
186 Conn_Close(idx, "Can't connect!", NULL, false);
188 if (ng_ipaddr_af(&Conf_Server[server].dst_addr[0])) {
189 /* more addresses to try... */
190 New_Server(res, &Conf_Server[server].dst_addr[0]);
191 /* connection to dst_addr[0] is now in progress, so
192 * remove this address... */
193 Conf_Server[server].dst_addr[0] =
194 Conf_Server[server].dst_addr[1];
195 memset(&Conf_Server[server].dst_addr[1], 0,
196 sizeof(Conf_Server[server].dst_addr[1]));
201 /* connect() succeeded, remove all additional addresses */
202 memset(&Conf_Server[server].dst_addr, 0,
203 sizeof(Conf_Server[server].dst_addr));
205 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
207 if ( Conn_OPTION_ISSET( &My_Connections[idx], CONN_SSL_CONNECT )) {
208 io_event_setcb( sock, cb_connserver_login_ssl );
209 io_event_add( sock, IO_WANTWRITE|IO_WANTREAD );
218 server_login(CONN_ID idx)
220 Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx,
221 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
223 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
224 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
226 /* Send PASS and SERVER command to peer */
227 Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
228 Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
234 cb_connserver_login_ssl(int sock, short unused)
236 CONN_ID idx = Socket2Index(sock);
244 switch (ConnSSL_Connect( &My_Connections[idx])) {
246 case 0: LogDebug("ConnSSL_Connect: not ready");
249 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
250 Conn_Close(idx, "Can't connect!", NULL, false);
254 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
255 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
263 cb_clientserver(int sock, short what)
265 CONN_ID idx = Socket2Index(sock);
274 if (what & IO_WANTREAD
275 || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE))) {
276 /* if TLS layer needs to write additional data, call
277 * Read_Request() instead so that SSL/TLS can continue */
281 if (what & IO_WANTREAD)
284 if (what & IO_WANTWRITE)
291 cb_clientserver_ssl(int sock, short what)
293 CONN_ID idx = Socket2Index(sock);
302 switch (ConnSSL_Accept(&My_Connections[idx])) {
306 return; /* EAGAIN: callback will be invoked again by IO layer */
308 Conn_Close(idx, "Socket closed!", "SSL accept error", false);
311 if (what & IO_WANTREAD)
314 if (what & IO_WANTWRITE)
317 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
327 /* Speicher fuer Verbindungs-Pool anfordern */
328 Pool_Size = CONNECTION_POOL;
329 if ((Conf_MaxConnections > 0) &&
330 (Pool_Size > Conf_MaxConnections))
331 Pool_Size = Conf_MaxConnections;
333 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
334 Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
338 /* FIXME: My_Connetions/Pool_Size is needed by other parts of the
339 * code; remove them! */
340 My_Connections = (CONNECTION*) array_start(&My_ConnArray);
342 LogDebug("Allocated connection pool for %d items (%ld bytes).",
343 array_length(&My_ConnArray, sizeof( CONNECTION )), array_bytes(&My_ConnArray));
345 assert( array_length(&My_ConnArray, sizeof( CONNECTION )) >= (size_t) Pool_Size);
347 array_free( &My_Listeners );
349 /* Connection-Struktur initialisieren */
350 for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
352 /* Global write counter */
362 Conn_ExitListeners();
364 LogDebug("Shutting down all connections ..." );
365 for( idx = 0; idx < Pool_Size; idx++ ) {
366 if( My_Connections[idx].sock > NONE ) {
367 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
368 "Server going down (restarting)":"Server going down", true );
372 array_free(&My_ConnArray);
373 My_Connections = NULL;
375 io_library_shutdown();
380 ports_initlisteners(array *a, const char *listen_addr, void (*func)(int,short))
382 unsigned int created = 0;
387 len = array_length(a, sizeof (UINT16));
388 port = array_start(a);
390 fd = NewListener(listen_addr, *port);
395 if (!io_event_create( fd, IO_WANTREAD, func )) {
396 Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!",
397 fd, (unsigned int) *port, strerror(errno));
410 Conn_InitListeners( void )
412 /* Initialize ports on which the server should accept connections */
413 unsigned int created = 0;
414 char *copy, *listen_addr;
416 if (!io_library_init(CONNECTION_POOL)) {
417 Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
421 assert(Conf_ListenAddress);
423 /* can't use Conf_ListenAddress directly, see below */
424 copy = strdup(Conf_ListenAddress);
426 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress, strerror(errno));
429 listen_addr = strtok(copy, ",");
431 while (listen_addr) {
432 ngt_TrimStr(listen_addr);
434 created += ports_initlisteners(&Conf_ListenPorts, listen_addr, cb_listen);
436 created += ports_initlisteners(&Conf_SSLOptions.ListenPorts, listen_addr, cb_listen_ssl);
440 listen_addr = strtok(NULL, ",");
443 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
444 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
445 * Instead, free() takes place in conf.c, before the config file
446 * is being parsed. */
450 } /* Conn_InitListeners */
454 Conn_ExitListeners( void )
456 /* Close down all listening sockets */
460 Rendezvous_UnregisterListeners( );
463 arraylen = array_length(&My_Listeners, sizeof (int));
465 "Shutting down all listening sockets (%d total) ...", arraylen);
466 fd = array_start(&My_Listeners);
471 LogDebug("Listening socket %d closed.", *fd );
474 array_free(&My_Listeners);
475 } /* Conn_ExitListeners */
479 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
483 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
485 assert(listen_addrstr);
486 Log(LOG_CRIT, "Can't bind to [%s]:%u: can't convert ip address \"%s\"",
487 listen_addrstr, Port, listen_addrstr);
494 set_v6_only(int af, int sock)
496 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
502 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
503 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
511 /* return new listening port file descriptor or -1 on failure */
513 NewListener(const char *listen_addr, UINT16 Port)
515 /* Create new listening socket on specified port */
519 char name[CLIENT_ID_LEN], *info;
521 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
524 af = ng_ipaddr_af(&addr);
525 sock = socket(af, SOCK_STREAM, 0);
527 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af, strerror(errno));
531 set_v6_only(af, sock);
533 if (!Init_Socket(sock))
536 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
537 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s",
538 ng_ipaddr_tostr(&addr), Port, strerror(errno));
543 if( listen( sock, 10 ) != 0 ) {
544 Log( LOG_CRIT, "Can't listen on socket: %s!", strerror( errno ));
549 /* keep fd in list so we can close it when ngircd restarts/shuts down */
550 if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) {
551 Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno ));
556 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).", ng_ipaddr_tostr(&addr), Port, sock);
559 /* Get best server description text */
560 if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
563 /* Use server info string */
565 if( Conf_ServerInfo[0] == '[' )
567 /* Cut off leading hostname part in "[]" */
568 info = strchr( Conf_ServerInfo, ']' );
572 while( *info == ' ' ) info++;
575 if( ! info ) info = Conf_ServerInfo;
578 /* Add port number to description if non-standard */
580 snprintf(name, sizeof name, "%s (port %u)", info,
583 strlcpy(name, info, sizeof name);
585 /* Register service */
586 Rendezvous_Register( name, MDNS_TYPE, Port );
594 * SSL/TLS connections require extra treatment:
595 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
596 * need to take care of that first, before checking read/write buffers.
597 * For instance, while we might have data in our write buffer, the
598 * TLS/SSL protocol might need to read internal data first for TLS/SSL
601 * If this function returns true, such a condition is met and we have
602 * to reverse the condition (check for read even if we've data to write,
603 * do not check for read but writeability even if write-buffer is empty).
606 SSL_WantRead(const CONNECTION *c)
608 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
609 io_event_add(c->sock, IO_WANTREAD);
615 SSL_WantWrite(const CONNECTION *c)
617 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
618 io_event_add(c->sock, IO_WANTWRITE);
625 SSL_WantRead(UNUSED const CONNECTION *c) { return false; }
627 SSL_WantWrite(UNUSED const CONNECTION *c) { return false; }
632 * "Main Loop": Loop until shutdown or restart is signalled.
633 * This function loops until a shutdown or restart of ngIRCd is signalled and
634 * calls io_dispatch() to check for readable and writable sockets every second.
635 * It checks for status changes on pending connections (e. g. when a hostname
636 * has been resolved), checks for "penalties" and timeouts, and handles the
643 unsigned int wdatalen, bytes_processed;
647 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
651 Rendezvous_Handler();
654 /* Should the configuration be reloaded? */
655 if (NGIRCd_SignalRehash)
658 /* Check configured servers and established links */
662 /* Look for non-empty read buffers ... */
663 for (i = 0; i < Pool_Size; i++) {
664 if ((My_Connections[i].sock > NONE)
665 && (array_bytes(&My_Connections[i].rbuf) > 0)
666 && (My_Connections[i].delaytime <= t)) {
667 /* ... and try to handle the received data */
668 bytes_processed = Handle_Buffer(i);
669 /* if we processed data, and there might be
670 * more commands in the input buffer, do not
671 * try to read any more data now */
672 if (bytes_processed &&
673 array_bytes(&My_Connections[i].rbuf) > 2) {
675 ("Throttling connection %d: command limit reached!",
677 Conn_SetPenalty(i, 1);
682 /* Look for non-empty write buffers ... */
683 for (i = 0; i < Pool_Size; i++) {
684 if (My_Connections[i].sock <= NONE)
687 wdatalen = (unsigned int)array_bytes(&My_Connections[i].wbuf);
690 array_bytes(&My_Connections[i].zip.wbuf) > 0)
695 if (SSL_WantRead(&My_Connections[i]))
697 io_event_add(My_Connections[i].sock,
702 /* Check from which sockets we possibly could read ... */
703 for (i = 0; i < Pool_Size; i++) {
704 if (My_Connections[i].sock <= NONE)
707 if (SSL_WantWrite(&My_Connections[i]))
708 continue; /* TLS/SSL layer needs to write data; deal with this first */
710 if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
711 /* Wait for completion of resolver sub-process ... */
712 io_event_del(My_Connections[i].sock,
717 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
718 /* Wait for completion of connect() ... */
721 if (My_Connections[i].delaytime > t) {
722 /* There is a "penalty time" set: ignore socket! */
723 io_event_del(My_Connections[i].sock,
727 io_event_add(My_Connections[i].sock, IO_WANTREAD);
730 /* Set the timeout for reading from the network to 1 second,
731 * which is the granularity with witch we handle "penalty
732 * times" for example.
733 * Note: tv_sec/usec are undefined(!) after io_dispatch()
734 * returns, so we have to set it beforce each call to it! */
738 /* Wait for activity ... */
739 i = io_dispatch(&tv);
740 if (i == -1 && errno != EINTR) {
741 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
743 Log(LOG_ALERT, "%s exiting due to fatal errors!",
749 if (NGIRCd_SignalQuit)
750 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
751 else if (NGIRCd_SignalRestart)
752 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
757 * Write a text string into the socket of a connection.
758 * This function automatically appends CR+LF to the string and validates that
759 * the result is a valid IRC message (oversized messages are shortened, for
760 * example). Then it calls the Conn_Write() function to do the actual sending.
761 * @param Idx Index fo the connection.
762 * @param Format Format string, see printf().
763 * @return true on success, false otherwise.
767 Conn_WriteStr( CONN_ID Idx, char *Format, ... )
770 Conn_WriteStr( Idx, Format, va_alist )
776 char buffer[COMMAND_LEN];
781 assert( Idx > NONE );
782 assert( Format != NULL );
785 va_start( ap, Format );
789 if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
791 * The string that should be written to the socket is longer
792 * than the allowed size of COMMAND_LEN bytes (including both
793 * the CR and LF characters). This can be caused by the
794 * IRC_WriteXXX() functions when the prefix of this server had
795 * to be added to an already "quite long" command line which
796 * has been received from a regular IRC client, for example.
798 * We are not allowed to send such "oversized" messages to
799 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
800 * ("these messages SHALL NOT exceed 512 characters in length,
801 * counting all characters including the trailing CR-LF").
803 * So we have a big problem here: we should send more bytes
804 * to the network than we are allowed to and we don't know
805 * the originator (any more). The "old" behaviour of blaming
806 * the receiver ("next hop") is a bad idea (it could be just
807 * an other server only routing the message!), so the only
808 * option left is to shorten the string and to hope that the
809 * result is still somewhat useful ...
813 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
819 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
822 len = strlcat( buffer, "\r\n", sizeof( buffer ));
823 ok = Conn_Write(Idx, buffer, len);
824 My_Connections[Idx].msg_out++;
828 } /* Conn_WriteStr */
832 * Append Data to the outbound write buffer of a connection.
833 * @param Idx Index of the connection.
834 * @param Data pointer to the data.
835 * @param Len length of Data.
836 * @return true on success, false otherwise.
839 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
842 size_t writebuf_limit = WRITEBUFFER_LEN;
843 assert( Idx > NONE );
844 assert( Data != NULL );
847 c = Conn_GetClient(Idx);
850 /* Servers do get special write buffer limits, so they can generate
851 * all the messages that are required while peering. */
852 if (Client_Type(c) == CLIENT_SERVER)
853 writebuf_limit = WRITEBUFFER_SLINK_LEN;
855 /* Is the socket still open? A previous call to Conn_Write()
856 * may have closed the connection due to a fatal error.
857 * In this case it is sufficient to return an error, as well. */
858 if( My_Connections[Idx].sock <= NONE ) {
859 LogDebug("Skipped write on closed socket (connection %d).", Idx);
864 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
866 * Zip_Buffer() does all the dirty work for us: it flushes
867 * the (pre-)compression buffers if required and handles
868 * all error conditions. */
869 if (!Zip_Buffer(Idx, Data, Len))
875 /* Uncompressed link:
876 * Check if outbound buffer has enough space for the data. */
877 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
879 /* Buffer is full, flush it. Handle_Write deals with
880 * low-level errors, if any. */
881 if (!Handle_Write(Idx))
885 /* When the write buffer is still too big after flushing it,
886 * the connection will be killed. */
887 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
890 "Write buffer overflow (connection %d, size %lu byte)!",
892 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
893 Conn_Close(Idx, "Write buffer overflow!", NULL, false);
897 /* Copy data to write buffer */
898 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
901 My_Connections[Idx].bytes_out += Len;
904 /* Adjust global write counter */
912 Conn_Close( CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient )
914 /* Close connection. Open pipes of asyncronous resolver
915 * sub-processes are closed down. */
921 double in_z_k, out_z_k;
925 assert( Idx > NONE );
927 /* Is this link already shutting down? */
928 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
929 /* Conn_Close() has been called recursively for this link;
930 * probabe reason: Handle_Write() failed -- see below. */
931 LogDebug("Recursive request to close connection: %d", Idx );
935 assert( My_Connections[Idx].sock > NONE );
937 /* Mark link as "closing" */
938 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
940 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
941 Log(LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx,
942 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
944 /* Search client, if any */
945 c = Conn_GetClient( Idx );
947 /* Should the client be informed? */
950 /* Send statistics to client if registered as user: */
951 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
953 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
954 Client_ID(Client_ThisServer()), Client_ID(c),
956 (double)My_Connections[Idx].bytes_in / 1024,
957 (double)My_Connections[Idx].bytes_out / 1024);
960 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
962 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
964 Conn_WriteStr(Idx, "ERROR :Closing connection.");
967 /* Try to write out the write buffer. Note: Handle_Write() eventually
968 * removes the CLIENT structure associated with this connection if an
969 * error occurs! So we have to re-check if there is still an valid
970 * CLIENT structure after calling Handle_Write() ...*/
971 (void)Handle_Write( Idx );
973 /* Search client, if any (re-check!) */
974 c = Conn_GetClient( Idx );
976 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
977 Log(LOG_INFO, "SSL connection %d shutting down ...", Idx);
978 ConnSSL_Free(&My_Connections[Idx]);
981 /* Shut down socket */
982 if (! io_close(My_Connections[Idx].sock)) {
983 /* Oops, we can't close the socket!? This is ... ugly! */
985 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
986 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
987 port, strerror(errno));
990 /* Mark socket as invalid: */
991 My_Connections[Idx].sock = NONE;
993 /* If there is still a client, unregister it now */
995 Client_Destroy(c, LogMsg, FwdMsg, true);
997 /* Calculate statistics and log information */
998 in_k = (double)My_Connections[Idx].bytes_in / 1024;
999 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1001 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1002 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1003 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1004 /* Make sure that no division by zero can occur during
1005 * the calculation of in_p and out_p: in_z_k and out_z_k
1006 * are non-zero, that's guaranteed by the protocol until
1007 * compression can be enabled. */
1012 in_p = (int)(( in_k * 100 ) / in_z_k );
1013 out_p = (int)(( out_k * 100 ) / out_z_k );
1015 "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1016 Idx, My_Connections[Idx].host, port,
1017 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1023 "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).",
1024 Idx, My_Connections[Idx].host, port,
1028 /* cancel running resolver */
1029 if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat))
1030 Resolve_Shutdown(&My_Connections[Idx].res_stat);
1032 /* Servers: Modify time of next connect attempt? */
1033 Conf_UnsetServer( Idx );
1036 /* Clean up zlib, if link was compressed */
1037 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1038 inflateEnd( &My_Connections[Idx].zip.in );
1039 deflateEnd( &My_Connections[Idx].zip.out );
1040 array_free(&My_Connections[Idx].zip.rbuf);
1041 array_free(&My_Connections[Idx].zip.wbuf);
1045 array_free(&My_Connections[Idx].rbuf);
1046 array_free(&My_Connections[Idx].wbuf);
1048 /* Clean up connection structure (=free it) */
1049 Init_Conn_Struct( Idx );
1051 assert(NumConnections > 0);
1054 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1055 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1060 Conn_SyncServerStruct( void )
1062 /* Synchronize server structures (connection IDs):
1063 * connections <-> configuration */
1069 for( i = 0; i < Pool_Size; i++ ) {
1070 /* Established connection? */
1071 if (My_Connections[i].sock < 0)
1074 /* Server connection? */
1075 client = Conn_GetClient( i );
1076 if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
1078 for( c = 0; c < MAX_SERVERS; c++ )
1080 /* Configured server? */
1081 if( ! Conf_Server[c].host[0] ) continue;
1084 if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 )
1085 Conf_Server[c].conn_id = i;
1088 } /* SyncServerStruct */
1092 * Send out data of write buffer; connect new sockets.
1095 Handle_Write( CONN_ID Idx )
1100 assert( Idx > NONE );
1101 if ( My_Connections[Idx].sock < 0 ) {
1102 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1105 assert( My_Connections[Idx].sock > NONE );
1107 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1110 if (wdatalen == 0) {
1111 /* Write buffer is empty, so we try to flush the compression
1112 * buffer and get some data to work with from there :-) */
1113 if (!Zip_Flush(Idx))
1116 /* Now the write buffer most probably has changed: */
1117 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1121 if (wdatalen == 0) {
1122 /* Still no data, fine. */
1123 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1128 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1132 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1133 len = ConnSSL_Write(&My_Connections[Idx], array_start(&My_Connections[Idx].wbuf), wdatalen);
1137 len = write(My_Connections[Idx].sock,
1138 array_start(&My_Connections[Idx].wbuf), wdatalen );
1141 if (errno == EAGAIN || errno == EINTR)
1144 Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
1145 Idx, My_Connections[Idx].sock, strerror(errno));
1146 Conn_Close(Idx, "Write error!", NULL, false);
1150 /* move any data not yet written to beginning */
1151 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1154 } /* Handle_Write */
1158 Count_Connections(ng_ipaddr_t *a)
1163 for (i = 0; i < Pool_Size; i++) {
1164 if (My_Connections[i].sock <= NONE)
1166 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1170 } /* Count_Connections */
1174 New_Connection(int Sock)
1176 /* Neue Client-Verbindung von Listen-Socket annehmen und
1177 * CLIENT-Struktur anlegen. */
1180 struct request_info req;
1182 ng_ipaddr_t new_addr;
1183 char ip_str[NG_INET_ADDRSTRLEN];
1184 int new_sock, new_sock_len, identsock;
1188 assert(Sock > NONE);
1190 new_sock_len = (int)sizeof(new_addr);
1191 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1192 (socklen_t *)&new_sock_len);
1194 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1198 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1199 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1200 Simple_Message(new_sock, "ERROR :Internal Server Error");
1206 /* Validate socket using TCP Wrappers */
1207 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1208 RQ_CLIENT_SIN, &new_addr, NULL);
1210 if (!hosts_access(&req)) {
1212 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1213 Simple_Message(new_sock, "ERROR :Connection refused");
1219 if (!Init_Socket(new_sock))
1222 /* Check global connection limit */
1223 if ((Conf_MaxConnections > 0) &&
1224 (NumConnections >= (size_t) Conf_MaxConnections)) {
1225 Log(LOG_ALERT, "Can't accept connection: limit (%d) reached!",
1226 Conf_MaxConnections);
1227 Simple_Message(new_sock, "ERROR :Connection limit reached");
1232 /* Check IP-based connection limit */
1233 cnt = Count_Connections(&new_addr);
1234 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1235 /* Access denied, too many connections from this IP address! */
1237 "Refused connection from %s: too may connections (%ld) from this IP address!",
1239 Simple_Message(new_sock,
1240 "ERROR :Connection refused, too many connections from your IP address!");
1245 if (new_sock >= Pool_Size) {
1246 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
1247 (size_t) new_sock)) {
1249 "Can't allocate memory! [New_Connection]");
1250 Simple_Message(new_sock, "ERROR: Internal error");
1254 LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
1255 new_sock, array_length(&My_ConnArray,
1256 sizeof(CONNECTION)), array_bytes(&My_ConnArray));
1258 /* Adjust pointer to new block */
1259 My_Connections = array_start(&My_ConnArray);
1260 while (Pool_Size <= new_sock)
1261 Init_Conn_Struct(Pool_Size++);
1264 /* register callback */
1265 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1267 "Can't accept connection: io_event_create failed!");
1268 Simple_Message(new_sock, "ERROR :Internal error");
1273 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWN, false);
1276 "Can't accept connection: can't create client structure!");
1277 Simple_Message(new_sock, "ERROR :Internal error");
1282 Init_Conn_Struct(new_sock);
1283 My_Connections[new_sock].sock = new_sock;
1284 My_Connections[new_sock].addr = new_addr;
1285 My_Connections[new_sock].client = c;
1287 /* Set initial hostname to IP address. This becomes overwritten when
1288 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1289 if (ng_ipaddr_af(&new_addr) != AF_INET)
1290 snprintf(My_Connections[new_sock].host,
1291 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1293 strlcpy(My_Connections[new_sock].host, ip_str,
1294 sizeof(My_Connections[new_sock].host));
1296 Client_SetHostname(c, My_Connections[new_sock].host);
1298 Log(LOG_INFO, "Accepted connection %d from %s:%d on socket %d.",
1299 new_sock, My_Connections[new_sock].host,
1300 ng_ipaddr_getport(&new_addr), Sock);
1302 identsock = new_sock;
1308 Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
1309 identsock, cb_Read_Resolver_Result);
1311 /* ngIRCd waits up to 4 seconds for the result of the asynchronous
1312 * DNS and IDENT resolver subprocess using the "penalty" mechanism.
1313 * If there are results earlier, the delay is aborted. */
1314 Conn_SetPenalty(new_sock, 4);
1316 } /* New_Connection */
1320 Socket2Index( int Sock )
1322 assert( Sock >= 0 );
1324 if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
1325 /* the Connection was already closed again, likely due to
1327 LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
1331 } /* Socket2Index */
1335 * Read data from the network to the read buffer. If an error occures,
1336 * the socket of this connection will be shut down.
1339 Read_Request( CONN_ID Idx )
1342 static const unsigned int maxbps = COMMAND_LEN / 2;
1343 char readbuf[READBUFFER_LEN];
1346 assert( Idx > NONE );
1347 assert( My_Connections[Idx].sock > NONE );
1350 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1351 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1353 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1356 /* Read buffer is full */
1358 "Receive buffer overflow (connection %d): %d bytes!",
1359 Idx, array_bytes(&My_Connections[Idx].rbuf));
1360 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1365 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1366 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1369 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1371 Log(LOG_INFO, "%s:%u (%s) is closing the connection ...",
1372 My_Connections[Idx].host,
1373 (unsigned int) ng_ipaddr_getport(&My_Connections[Idx].addr),
1374 ng_ipaddr_tostr(&My_Connections[Idx].addr));
1376 "Socket closed!", "Client closed connection",
1382 if( errno == EAGAIN ) return;
1383 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1384 Idx, My_Connections[Idx].sock, strerror(errno));
1385 Conn_Close(Idx, "Read error!", "Client closed connection",
1390 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1391 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1394 "Could not append recieved data to zip input buffer (connn %d): %d bytes!",
1396 Conn_Close(Idx, "Receive buffer overflow!", NULL,
1403 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1404 Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
1405 Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
1409 /* Update connection statistics */
1410 My_Connections[Idx].bytes_in += len;
1412 /* Update timestamp of last data received if this connection is
1413 * registered as a user, server or service connection. Don't update
1414 * otherwise, so users have at least Conf_PongTimeout seconds time to
1415 * register with the IRC server -- see Check_Connections().
1416 * Set "lastping", too, so we can handle time shifts backwards ... */
1417 c = Conn_GetClient(Idx);
1418 if (c && (Client_Type(c) == CLIENT_USER
1419 || Client_Type(c) == CLIENT_SERVER
1420 || Client_Type(c) == CLIENT_SERVICE)) {
1422 if (My_Connections[Idx].lastdata != t)
1423 My_Connections[Idx].bps = 0;
1425 My_Connections[Idx].lastdata = t;
1426 My_Connections[Idx].lastping = My_Connections[Idx].lastdata;
1429 /* Look at the data in the (read-) buffer of this connection */
1430 My_Connections[Idx].bps += Handle_Buffer(Idx);
1431 if (Client_Type(c) != CLIENT_SERVER
1432 && My_Connections[Idx].bps >= maxbps) {
1433 LogDebug("Throttling connection %d: BPS exceeded! (%u >= %u)",
1434 Idx, My_Connections[Idx].bps, maxbps);
1435 Conn_SetPenalty(Idx, 1);
1437 } /* Read_Request */
1441 * Handle all data in the connection read-buffer.
1442 * Data is processed until no complete command is left in the read buffer,
1443 * or MAX_COMMANDS[_SERVER] commands were processed.
1444 * When a fatal error occurs, the connection is shut down.
1445 * @param Idx Index of the connection.
1446 * @return number of bytes processed.
1449 Handle_Buffer(CONN_ID Idx)
1452 char *ptr1, *ptr2, *first_eol;
1460 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1463 c = Conn_GetClient(Idx);
1466 /* Servers do get special command limits, so they can process
1467 * all the messages that are required while peering. */
1468 if (Client_Type(c) == CLIENT_SERVER)
1469 maxcmd = MAX_COMMANDS_SERVER;
1471 starttime = time(NULL);
1472 for (i=0; i < maxcmd; i++) {
1474 if (My_Connections[Idx].delaytime > starttime)
1477 /* Unpack compressed data, if compression is in use */
1478 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1479 /* When unzipping fails, Unzip_Buffer() shuts
1480 * down the connection itself */
1481 if (!Unzip_Buffer(Idx))
1486 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1489 /* Make sure that the buffer is NULL terminated */
1490 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1491 Conn_Close(Idx, NULL,
1492 "Can't allocate memory [Handle_Buffer]",
1497 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1498 * "IRC messages are always lines of characters terminated
1499 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1501 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1504 /* Check for non-RFC-compliant request (only CR or LF)?
1505 * Unfortunately, there are quite a few clients out there
1506 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1507 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1508 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1510 /* Check if there is a single CR or LF _before_ the
1511 * corerct CR+LF line terminator: */
1512 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1513 if (first_eol < ptr) {
1514 /* Single CR or LF before CR+LF found */
1518 } else if (ptr1 || ptr2) {
1519 /* No CR+LF terminated command found, but single
1520 * CR or LF found ... */
1522 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1524 ptr = ptr1 ? ptr1 : ptr2;
1532 /* Complete (=line terminated) request found, handle it! */
1535 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1537 if (len > (COMMAND_LEN - 1)) {
1538 /* Request must not exceed 512 chars (incl. CR+LF!),
1539 * see RFC 2812. Disconnect Client if this happens. */
1541 "Request too long (connection %d): %d bytes (max. %d expected)!",
1542 Idx, array_bytes(&My_Connections[Idx].rbuf),
1544 Conn_Close(Idx, NULL, "Request too long", true);
1548 len_processed += (unsigned int)len;
1550 /* Request is empty (only '\r\n', '\r' or '\n');
1551 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1552 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1556 /* remember if stream is already compressed */
1557 old_z = My_Connections[Idx].options & CONN_ZIP;
1560 My_Connections[Idx].msg_in++;
1562 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1563 return 0; /* error -> connection has been closed */
1565 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1566 LogDebug("Connection %d: %d bytes left in read buffer.",
1567 Idx, array_bytes(&My_Connections[Idx].rbuf));
1569 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1570 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1571 /* The last command activated socket compression.
1572 * Data that was read after that needs to be copied
1573 * to the unzip buffer for decompression: */
1575 (&My_Connections[Idx].zip.rbuf,
1576 &My_Connections[Idx].rbuf)) {
1577 Conn_Close(Idx, NULL,
1578 "Can't allocate memory [Handle_Buffer]",
1583 array_trunc(&My_Connections[Idx].rbuf);
1585 ("Moved already received data (%u bytes) to uncompression buffer.",
1586 array_bytes(&My_Connections[Idx].zip.rbuf));
1590 return len_processed;
1591 } /* Handle_Buffer */
1595 Check_Connections(void)
1597 /* check if connections are alive. if not, play PING-PONG first.
1598 * if this doesn't help either, disconnect client. */
1603 for (i = 0; i < Pool_Size; i++) {
1604 if (My_Connections[i].sock < 0)
1607 c = Conn_GetClient(i);
1608 if (c && ((Client_Type(c) == CLIENT_USER)
1609 || (Client_Type(c) == CLIENT_SERVER)
1610 || (Client_Type(c) == CLIENT_SERVICE))) {
1611 /* connected User, Server or Service */
1612 if (My_Connections[i].lastping >
1613 My_Connections[i].lastdata) {
1614 /* We already sent a ping */
1615 if (My_Connections[i].lastping <
1616 time(NULL) - Conf_PongTimeout) {
1619 ("Connection %d: Ping timeout: %d seconds.",
1620 i, Conf_PongTimeout);
1621 snprintf(msg, sizeof(msg), "Ping timeout: %d seconds", Conf_PongTimeout);
1622 Conn_Close(i, NULL, msg, true);
1624 } else if (My_Connections[i].lastdata <
1625 time(NULL) - Conf_PingTimeout) {
1626 /* We need to send a PING ... */
1627 LogDebug("Connection %d: sending PING ...", i);
1628 My_Connections[i].lastping = time(NULL);
1629 Conn_WriteStr(i, "PING :%s",
1630 Client_ID(Client_ThisServer()));
1633 /* The connection is not fully established yet, so
1634 * we don't do the PING-PONG game here but instead
1635 * disconnect the client after "a short time" if it's
1636 * still not registered. */
1638 if (My_Connections[i].lastdata <
1639 time(NULL) - Conf_PongTimeout) {
1641 ("Unregistered connection %d timed out ...",
1643 Conn_Close(i, NULL, "Timeout", false);
1647 } /* Check_Connections */
1651 Check_Servers( void )
1653 /* Check if we can establish further server links */
1658 /* Check all configured servers */
1659 for( i = 0; i < MAX_SERVERS; i++ ) {
1660 /* Valid outgoing server which isn't already connected or disabled? */
1661 if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
1662 ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
1665 /* Is there already a connection in this group? */
1666 if( Conf_Server[i].group > NONE ) {
1667 for (n = 0; n < MAX_SERVERS; n++) {
1668 if (n == i) continue;
1669 if ((Conf_Server[n].conn_id != NONE) &&
1670 (Conf_Server[n].group == Conf_Server[i].group))
1673 if (n < MAX_SERVERS) continue;
1676 /* Check last connect attempt? */
1677 time_now = time(NULL);
1678 if( Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1681 /* Okay, try to connect now */
1682 Conf_Server[i].lasttry = time_now;
1683 Conf_Server[i].conn_id = SERVER_WAIT;
1684 assert(Resolve_Getfd(&Conf_Server[i].res_stat) < 0);
1685 Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host, cb_Connect_to_Server);
1687 } /* Check_Servers */
1691 New_Server( int Server , ng_ipaddr_t *dest)
1693 /* Establish new server link */
1694 char ip_str[NG_INET_ADDRSTRLEN];
1695 int af_dest, res, new_sock;
1698 assert( Server > NONE );
1700 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1701 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1705 Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ",
1706 Conf_Server[Server].host, ip_str, Conf_Server[Server].port );
1708 af_dest = ng_ipaddr_af(dest);
1709 new_sock = socket(af_dest, SOCK_STREAM, 0);
1711 Log( LOG_CRIT, "Can't create socket (af %d) : %s!", af_dest, strerror( errno ));
1715 if (!Init_Socket(new_sock))
1718 /* is a bind address configured? */
1719 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1720 /* if yes, bind now. If it fails, warn and let connect() pick a source address */
1721 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1722 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1724 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1725 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str, strerror(errno));
1727 ng_ipaddr_setport(dest, Conf_Server[Server].port);
1728 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
1729 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1730 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1735 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
1737 "Cannot allocate memory for server connection (socket %d)",
1743 My_Connections = array_start(&My_ConnArray);
1745 assert(My_Connections[new_sock].sock <= 0);
1747 Init_Conn_Struct(new_sock);
1749 ng_ipaddr_tostr_r(dest, ip_str);
1750 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
1752 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
1757 /* Conn_Close() decrements this counter again */
1759 Client_SetIntroducer( c, c );
1760 Client_SetToken( c, TOKEN_OUTBOUND );
1762 /* Register connection */
1763 Conf_Server[Server].conn_id = new_sock;
1764 My_Connections[new_sock].sock = new_sock;
1765 My_Connections[new_sock].addr = *dest;
1766 My_Connections[new_sock].client = c;
1767 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
1768 sizeof(My_Connections[new_sock].host ));
1770 /* Register new socket */
1771 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
1772 Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
1773 Conn_Close( new_sock, "io_event_create() failed", NULL, false );
1774 Init_Conn_Struct( new_sock );
1775 Conf_Server[Server].conn_id = NONE;
1778 if (Conf_Server[Server].SSLConnect && !ConnSSL_PrepareConnect( &My_Connections[new_sock],
1779 &Conf_Server[Server] ))
1781 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
1782 Conn_Close( new_sock, "Could not initialize SSL for outgoing connection", NULL, false );
1783 Init_Conn_Struct( new_sock );
1784 Conf_Server[Server].conn_id = NONE;
1788 LogDebug("Registered new connection %d on socket %d (%ld in total).",
1789 new_sock, My_Connections[new_sock].sock, NumConnections);
1790 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
1795 * Initialize connection structure.
1798 Init_Conn_Struct(CONN_ID Idx)
1800 time_t now = time(NULL);
1802 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
1803 My_Connections[Idx].sock = -1;
1804 My_Connections[Idx].signon = now;
1805 My_Connections[Idx].lastdata = now;
1806 My_Connections[Idx].lastprivmsg = now;
1807 Resolve_Init(&My_Connections[Idx].res_stat);
1808 } /* Init_Conn_Struct */
1812 Init_Socket( int Sock )
1814 /* Initialize socket (set options) */
1818 if (!io_setnonblock(Sock)) {
1819 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
1824 /* Don't block this port after socket shutdown */
1826 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
1828 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
1829 /* ignore this error */
1832 /* Set type of service (TOS) */
1833 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
1834 value = IPTOS_LOWDELAY;
1835 LogDebug("Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
1836 if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
1838 Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
1839 /* ignore this error */
1848 cb_Connect_to_Server(int fd, UNUSED short events)
1850 /* Read result of resolver sub-process from pipe and start connection */
1853 ng_ipaddr_t dest_addrs[4]; /* we can handle at most 3; but we read up to
1854 four so we can log the 'more than we can handle'
1855 condition. First result is tried immediately, rest
1856 is saved for later if needed. */
1858 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
1860 for (i=0; i < MAX_SERVERS; i++) {
1861 if (Resolve_Getfd(&Conf_Server[i].res_stat) == fd )
1865 if( i >= MAX_SERVERS) {
1866 /* Ops, no matching server found?! */
1868 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
1872 /* Read result from pipe */
1873 len = Resolve_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
1877 assert((len % sizeof(ng_ipaddr_t)) == 0);
1879 LogDebug("Got result from resolver: %u structs (%u bytes).", len/sizeof(ng_ipaddr_t), len);
1881 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
1882 if (len > sizeof(ng_ipaddr_t)) {
1883 /* more than one address for this hostname, remember them
1884 * in case first address is unreachable/not available */
1885 len -= sizeof(ng_ipaddr_t);
1886 if (len > sizeof(Conf_Server[i].dst_addr)) {
1887 len = sizeof(Conf_Server[i].dst_addr);
1889 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
1891 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
1894 New_Server(i, dest_addrs);
1895 } /* cb_Read_Forward_Lookup */
1899 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
1901 /* Read result of resolver sub-process from pipe and update the
1902 * apropriate connection/client structure(s): hostname and/or
1903 * IDENT user name.*/
1910 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
1912 char readbuf[HOST_LEN + 1];
1915 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
1917 /* Search associated connection ... */
1918 for( i = 0; i < Pool_Size; i++ ) {
1919 if(( My_Connections[i].sock != NONE )
1920 && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
1923 if( i >= Pool_Size ) {
1924 /* Ops, none found? Probably the connection has already
1925 * been closed!? We'll ignore that ... */
1927 LogDebug("Resolver: Got callback for unknown connection!?");
1931 /* Read result from pipe */
1932 len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
1936 readbuf[len] = '\0';
1937 identptr = strchr(readbuf, '\n');
1938 assert(identptr != NULL);
1940 Log( LOG_CRIT, "Resolver: Got malformed result!");
1945 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
1946 /* Okay, we got a complete result: this is a host name for outgoing
1947 * connections and a host name and IDENT user name (if enabled) for
1948 * incoming connections.*/
1949 assert ( My_Connections[i].sock >= 0 );
1950 /* Incoming connection. Search client ... */
1951 c = Conn_GetClient( i );
1952 assert( c != NULL );
1954 /* Only update client information of unregistered clients */
1955 if( Client_Type( c ) == CLIENT_UNKNOWN ) {
1956 strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
1957 Client_SetHostname( c, readbuf);
1961 Log(LOG_INFO, "IDENT lookup for connection %d: \"%s\".", i, identptr);
1962 Client_SetUser(c, identptr, true);
1964 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
1969 else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
1971 /* Reset penalty time */
1972 Conn_ResetPenalty( i );
1973 } /* cb_Read_Resolver_Result */
1977 Simple_Message( int Sock, const char *Msg )
1979 char buf[COMMAND_LEN];
1981 /* Write "simple" message to socket, without using compression
1982 * or even the connection write buffers. Used e.g. for error
1983 * messages by New_Connection(). */
1984 assert( Sock > NONE );
1985 assert( Msg != NULL );
1987 strlcpy( buf, Msg, sizeof buf - 2);
1988 len = strlcat( buf, "\r\n", sizeof buf);
1989 (void)write(Sock, buf, len);
1990 } /* Simple_Error */
1994 Conn_GetClient( CONN_ID Idx )
1996 /* return Client-Structure that belongs to the local Connection Idx.
1997 * If none is found, return NULL.
2002 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2004 return c ? c->client : NULL;
2009 /* we cannot access My_Connections in irc-info.c */
2011 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2015 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2016 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2021 Conn_UsesSSL(CONN_ID Idx)
2025 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2026 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);