2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
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.
22 * Connection management
37 #include <sys/socket.h>
39 #include <sys/types.h>
41 #include <netinet/in.h>
43 #ifdef HAVE_NETINET_IP_H
44 # ifdef HAVE_NETINET_IN_SYSTM_H
45 # include <netinet/in_systm.h>
47 # include <netinet/ip.h>
51 # include <tcpd.h> /* for TCP Wrappers */
66 #include "conn-encoding.h"
69 #include "conn-func.h"
71 #include "ng_ipaddr.h"
79 #define SERVER_WAIT (NONE - 1)
81 #define MAX_COMMANDS 3
82 #define MAX_COMMANDS_SERVER_MIN 10
83 #define MAX_COMMANDS_SERVICE 10
85 #define SD_LISTEN_FDS_START 3
88 static bool Handle_Write PARAMS(( CONN_ID Idx ));
89 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
90 static int New_Connection PARAMS(( int Sock, bool IsSSL ));
91 static CONN_ID Socket2Index PARAMS(( int Sock ));
92 static void Read_Request PARAMS(( CONN_ID Idx ));
93 static unsigned int Handle_Buffer PARAMS(( CONN_ID Idx ));
94 static void Check_Connections PARAMS(( void ));
95 static void Check_Servers PARAMS(( void ));
96 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
97 static bool Init_Socket PARAMS(( int Sock ));
98 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
99 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
100 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
101 static void Account_Connection PARAMS((void));
104 static array My_Listeners;
105 static array My_ConnArray;
106 static size_t NumConnections, NumConnectionsMax, NumConnectionsAccepted;
109 int allow_severity = LOG_INFO;
110 int deny_severity = LOG_ERR;
113 static void server_login PARAMS((CONN_ID idx));
116 extern struct SSLOptions Conf_SSLOptions;
117 static void cb_connserver_login_ssl PARAMS((int sock, short what));
118 static void cb_clientserver_ssl PARAMS((int sock, short what));
120 static void cb_Read_Resolver_Result PARAMS((int sock, UNUSED short what));
121 static void cb_Connect_to_Server PARAMS((int sock, UNUSED short what));
122 static void cb_clientserver PARAMS((int sock, short what));
128 * Get number of sockets available from systemd(8).
130 * ngIRCd needs to implement its own sd_listen_fds(3) function and can't
131 * use the one provided by systemd itself, because the sockets will be
132 * used in a forked child process with a new PID, and this would trigger
133 * an error in the standard implementation.
135 * @return Number of sockets available, -1 if sockets have already been
136 * initialized, or 0 when no sockets have been passed.
139 my_sd_listen_fds(void)
144 /* Check if LISTEN_PID exists; but we ignore the result, because
145 * normally ngircd forks a child before checking this, and therefore
146 * the PID set in the environment is always wrong ... */
147 e = getenv("LISTEN_PID");
151 e = getenv("LISTEN_FDS");
156 unsetenv("LISTEN_FDS");
164 * IO callback for listening sockets: handle new connections. This callback
165 * gets called when a new non-SSL connection should be accepted.
167 * @param sock Socket descriptor.
168 * @param irrelevant (ignored IO specification)
171 cb_listen(int sock, short irrelevant)
174 (void) New_Connection(sock, false);
180 * IO callback for listening SSL sockets: handle new connections. This callback
181 * gets called when a new SSL-enabled connection should be accepted.
183 * @param sock Socket descriptor.
184 * @param irrelevant (ignored IO specification)
187 cb_listen_ssl(int sock, short irrelevant)
192 fd = New_Connection(sock, true);
195 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
201 * IO callback for new outgoing non-SSL server connections.
203 * @param sock Socket descriptor.
204 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
207 cb_connserver(int sock, UNUSED short what)
209 int res, err, server;
211 CONN_ID idx = Socket2Index( sock );
214 LogDebug("cb_connserver wants to write on unknown socket?!");
219 assert(what & IO_WANTWRITE);
221 /* Make sure that the server is still configured; it could have been
222 * removed in the meantime! */
223 server = Conf_GetServer(idx);
225 Log(LOG_ERR, "Connection on socket %d to \"%s\" aborted!",
226 sock, My_Connections[idx].host);
227 Conn_Close(idx, "Connection aborted", NULL, false);
231 /* connect() finished, get result. */
232 sock_len = (socklen_t)sizeof(err);
233 res = getsockopt(My_Connections[idx].sock, SOL_SOCKET, SO_ERROR,
235 assert(sock_len == sizeof(err));
237 /* Error while connecting? */
238 if ((res != 0) || (err != 0)) {
240 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
241 idx, strerror(errno));
244 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
245 My_Connections[idx].host, Conf_Server[server].port,
248 Conn_Close(idx, "Can't connect", NULL, false);
250 if (ng_ipaddr_af(&Conf_Server[server].dst_addr[0])) {
251 /* more addresses to try... */
252 New_Server(server, &Conf_Server[server].dst_addr[0]);
253 /* connection to dst_addr[0] is now in progress, so
254 * remove this address... */
255 Conf_Server[server].dst_addr[0] =
256 Conf_Server[server].dst_addr[1];
257 memset(&Conf_Server[server].dst_addr[1], 0,
258 sizeof(Conf_Server[server].dst_addr[1]));
263 /* connect() succeeded, remove all additional addresses */
264 memset(&Conf_Server[server].dst_addr, 0,
265 sizeof(Conf_Server[server].dst_addr));
267 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
269 if ( Conn_OPTION_ISSET( &My_Connections[idx], CONN_SSL_CONNECT )) {
270 io_event_setcb( sock, cb_connserver_login_ssl );
271 io_event_add( sock, IO_WANTWRITE|IO_WANTREAD );
280 * Login to a remote server.
282 * @param idx Connection index.
285 server_login(CONN_ID idx)
288 "Connection %d (socket %d) with \"%s:%d\" established. Now logging in ...",
289 idx, My_Connections[idx].sock, My_Connections[idx].host,
290 Conf_Server[Conf_GetServer(idx)].port);
292 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
293 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
295 /* Send PASS and SERVER command to peer */
296 Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
297 Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
303 * IO callback for new outgoing SSL-enabled server connections.
305 * @param sock Socket descriptor.
306 * @param unused (ignored IO specification)
309 cb_connserver_login_ssl(int sock, short unused)
311 CONN_ID idx = Socket2Index(sock);
319 switch (ConnSSL_Connect( &My_Connections[idx])) {
321 case 0: LogDebug("ConnSSL_Connect: not ready");
324 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
325 Conn_Close(idx, "Can't connect", NULL, false);
329 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
330 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
338 * IO callback for established non-SSL client and server connections.
340 * @param sock Socket descriptor.
341 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
344 cb_clientserver(int sock, short what)
346 CONN_ID idx = Socket2Index(sock);
355 if (what & IO_WANTREAD
356 || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE))) {
357 /* if TLS layer needs to write additional data, call
358 * Read_Request() instead so that SSL/TLS can continue */
362 if (what & IO_WANTREAD)
365 if (what & IO_WANTWRITE)
372 * IO callback for new SSL-enabled client and server connections.
374 * @param sock Socket descriptor.
375 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
378 cb_clientserver_ssl(int sock, UNUSED short what)
380 CONN_ID idx = Socket2Index(sock);
389 switch (ConnSSL_Accept(&My_Connections[idx])) {
393 return; /* EAGAIN: callback will be invoked again by IO layer */
396 "SSL accept error, closing socket", "SSL accept error",
401 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
407 * Initialize connection module.
414 Pool_Size = CONNECTION_POOL;
415 if ((Conf_MaxConnections > 0) &&
416 (Pool_Size > Conf_MaxConnections))
417 Pool_Size = Conf_MaxConnections;
419 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
420 Log(LOG_EMERG, "Can't allocate memory! [Conn_Init]");
424 /* FIXME: My_Connetions/Pool_Size is needed by other parts of the
425 * code; remove them! */
426 My_Connections = (CONNECTION*) array_start(&My_ConnArray);
428 LogDebug("Allocated connection pool for %d items (%ld bytes).",
429 array_length(&My_ConnArray, sizeof(CONNECTION)),
430 array_bytes(&My_ConnArray));
432 assert(array_length(&My_ConnArray, sizeof(CONNECTION)) >= (size_t)Pool_Size);
434 array_free( &My_Listeners );
436 for (i = 0; i < Pool_Size; i++)
442 * Clean up connection module.
449 Conn_ExitListeners();
451 LogDebug("Shutting down all connections ..." );
452 for( idx = 0; idx < Pool_Size; idx++ ) {
453 if( My_Connections[idx].sock > NONE ) {
454 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
455 "Server going down (restarting)":"Server going down", true );
459 array_free(&My_ConnArray);
460 My_Connections = NULL;
462 io_library_shutdown();
467 * Close all sockets (file descriptors) of open connections.
468 * This is useful in forked child processes, for example, to make sure that
469 * they don't hold connections open that the main process wants to close.
472 Conn_CloseAllSockets(int ExceptOf)
476 for(idx = 0; idx < Pool_Size; idx++) {
477 if(My_Connections[idx].sock > NONE &&
478 My_Connections[idx].sock != ExceptOf)
479 close(My_Connections[idx].sock);
485 * Initialize listening ports.
487 * @param a Array containing the ports the daemon should listen on.
488 * @param listen_addr Address the socket should listen on (can be "0.0.0.0").
489 * @param func IO callback function to register.
490 * @returns Number of listening sockets created.
493 Init_Listeners(array *a, const char *listen_addr, void (*func)(int,short))
495 unsigned int created = 0;
500 len = array_length(a, sizeof (UINT16));
501 port = array_start(a);
503 fd = NewListener(listen_addr, *port);
508 if (!io_event_create( fd, IO_WANTREAD, func )) {
510 "io_event_create(): Can't add fd %d (port %u): %s!",
511 fd, (unsigned int) *port, strerror(errno));
524 * Initialize all listening sockets.
526 * @returns Number of created listening sockets
529 Conn_InitListeners( void )
531 /* Initialize ports on which the server should accept connections */
532 unsigned int created = 0;
533 char *af_str, *copy, *listen_addr;
534 int count, fd, i, addr_len;
537 assert(Conf_ListenAddress);
539 count = my_sd_listen_fds();
542 "Not re-initializing listening sockets of systemd(8) ...");
546 /* systemd(8) passed sockets to us, so don't try to initialize
547 * listening sockets on our own but use the passed ones */
548 LogDebug("Initializing %d systemd sockets ...", count);
549 for (i = 0; i < count; i++) {
550 fd = SD_LISTEN_FDS_START + i;
551 addr_len = (int)sizeof(addr);
552 getsockname(fd, (struct sockaddr *)&addr, (socklen_t*)&addr_len);
554 if (addr.sin4.sin_family != AF_INET && addr.sin4.sin_family != AF_INET6)
556 if (addr.sin4.sin_family != AF_INET)
559 /* Socket is of unsupported type! For example, systemd passed in
560 * an IPv6 socket but ngIRCd isn't compiled with IPv6 support. */
561 switch (addr.sin4.sin_family)
563 case AF_UNSPEC: af_str = "AF_UNSPEC"; break;
564 case AF_UNIX: af_str = "AF_UNIX"; break;
565 case AF_INET: af_str = "AF_INET"; break;
567 case AF_INET6: af_str = "AF_INET6"; break;
570 case AF_NETLINK: af_str = "AF_NETLINK"; break;
572 default: af_str = "unknown"; break;
575 "Socket %d is of unsupported type \"%s\" (%d), have to ignore it!",
576 fd, af_str, addr.sin4.sin_family);
582 if (!io_event_create(fd, IO_WANTREAD, cb_listen)) {
584 "io_event_create(): Can't add fd %d: %s!",
585 fd, strerror(errno));
589 "Initialized socket %d from systemd(8): %s:%d.", fd,
590 ng_ipaddr_tostr(&addr), ng_ipaddr_getport(&addr));
596 /* not using systemd socket activation, initialize listening sockets: */
598 /* can't use Conf_ListenAddress directly, see below */
599 copy = strdup(Conf_ListenAddress);
601 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress,
605 listen_addr = strtok(copy, ",");
607 while (listen_addr) {
608 ngt_TrimStr(listen_addr);
610 created += Init_Listeners(&Conf_ListenPorts,
611 listen_addr, cb_listen);
613 created += Init_Listeners(&Conf_SSLOptions.ListenPorts,
614 listen_addr, cb_listen_ssl);
618 listen_addr = strtok(NULL, ",");
621 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
622 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
623 * Instead, free() takes place in conf.c, before the config file
624 * is being parsed. */
628 } /* Conn_InitListeners */
632 * Shut down all listening sockets.
635 Conn_ExitListeners( void )
637 /* Close down all listening sockets */
641 /* Get number of listening sockets to shut down. There can be none
642 * if ngIRCd has been "socket activated" by systemd. */
643 arraylen = array_length(&My_Listeners, sizeof (int));
648 "Shutting down all listening sockets (%d total) ...", arraylen);
649 fd = array_start(&My_Listeners);
654 LogDebug("Listening socket %d closed.", *fd );
657 array_free(&My_Listeners);
658 } /* Conn_ExitListeners */
662 * Bind a socket to a specific (source) address.
664 * @param addr Address structure.
665 * @param listen_addrstr Source address as string.
666 * @param Port Port number.
667 * @returns true on success, false otherwise.
670 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
674 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
676 assert(listen_addrstr);
677 Log(LOG_CRIT, "Can't bind to [%s]:%u: can't convert ip address \"%s\"!",
678 listen_addrstr, Port, listen_addrstr);
685 * Set a socket to "IPv6 only". If the given socket doesn't belong to the
686 * AF_INET6 family, or the operating system doesn't support this functionality,
687 * this function retruns silently.
689 * @param af Address family of the socket.
690 * @param sock Socket handle.
693 set_v6_only(int af, int sock)
695 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
701 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
702 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
711 * Initialize new listening port.
713 * @param listen_addr Local address to bind the socet to (can be 0.0.0.0).
714 * @param Port Port number on which the new socket should be listening.
715 * @returns file descriptor of the socket or -1 on failure.
718 NewListener(const char *listen_addr, UINT16 Port)
720 /* Create new listening socket on specified port */
724 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
727 af = ng_ipaddr_af(&addr);
728 sock = socket(af, SOCK_STREAM, 0);
730 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af,
735 set_v6_only(af, sock);
737 if (!Init_Socket(sock))
740 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
741 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s!",
742 ng_ipaddr_tostr(&addr), Port, strerror(errno));
747 if (listen(sock, 10) != 0) {
748 Log(LOG_CRIT, "Can't listen on socket: %s!", strerror(errno));
753 /* keep fd in list so we can close it when ngircd restarts/shuts down */
754 if (!array_catb(&My_Listeners, (char *)&sock, sizeof(int))) {
755 Log(LOG_CRIT, "Can't add socket to My_Listeners array: %s!",
761 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
762 ng_ipaddr_tostr(&addr), Port, sock);
770 * Check if SSL library needs to read SSL-protocol related data.
772 * SSL/TLS connections require extra treatment:
773 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
774 * need to take care of that first, before checking read/write buffers.
775 * For instance, while we might have data in our write buffer, the
776 * TLS/SSL protocol might need to read internal data first for TLS/SSL
779 * If this function returns true, such a condition is met and we have
780 * to reverse the condition (check for read even if we've data to write,
781 * do not check for read but writeability even if write-buffer is empty).
783 * @param c Connection to check.
784 * @returns true if SSL-library has to read protocol data.
787 SSL_WantRead(const CONNECTION *c)
789 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
790 io_event_add(c->sock, IO_WANTREAD);
797 * Check if SSL library needs to write SSL-protocol related data.
799 * Please see description of SSL_WantRead() for full description!
801 * @param c Connection to check.
802 * @returns true if SSL-library has to write protocol data.
805 SSL_WantWrite(const CONNECTION *c)
807 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
808 io_event_add(c->sock, IO_WANTWRITE);
817 SSL_WantRead(UNUSED const CONNECTION *c)
821 SSL_WantWrite(UNUSED const CONNECTION *c)
828 * "Main Loop": Loop until shutdown or restart is signalled.
830 * This function loops until a shutdown or restart of ngIRCd is signalled and
831 * calls io_dispatch() to check for readable and writable sockets every second.
832 * It checks for status changes on pending connections (e. g. when a hostname
833 * has been resolved), checks for "penalties" and timeouts, and handles the
840 unsigned int wdatalen, bytes_processed;
844 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
847 /* Check configured servers and established links */
851 /* Expire outdated class/list items */
854 /* Look for non-empty read buffers ... */
855 for (i = 0; i < Pool_Size; i++) {
856 if ((My_Connections[i].sock > NONE)
857 && (array_bytes(&My_Connections[i].rbuf) > 0)) {
858 /* ... and try to handle the received data */
859 bytes_processed = Handle_Buffer(i);
860 /* if we processed data, and there might be
861 * more commands in the input buffer, do not
862 * try to read any more data now */
863 if (bytes_processed &&
864 array_bytes(&My_Connections[i].rbuf) > 2) {
866 ("Throttling connection %d: command limit reached!",
868 Conn_SetPenalty(i, 1);
873 /* Look for non-empty write buffers ... */
874 for (i = 0; i < Pool_Size; i++) {
875 if (My_Connections[i].sock <= NONE)
878 wdatalen = (unsigned int)array_bytes(&My_Connections[i].wbuf);
881 array_bytes(&My_Connections[i].zip.wbuf) > 0)
886 if (SSL_WantRead(&My_Connections[i]))
888 io_event_add(My_Connections[i].sock,
893 /* Check from which sockets we possibly could read ... */
894 for (i = 0; i < Pool_Size; i++) {
895 if (My_Connections[i].sock <= NONE)
898 if (SSL_WantWrite(&My_Connections[i]))
899 continue; /* TLS/SSL layer needs to write data; deal with this first */
901 if (Proc_InProgress(&My_Connections[i].proc_stat)) {
902 /* Wait for completion of forked subprocess
903 * and ignore the socket in the meantime ... */
904 io_event_del(My_Connections[i].sock,
909 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
910 /* Wait for completion of connect() ... */
913 if (My_Connections[i].delaytime > t) {
914 /* There is a "penalty time" set: ignore socket! */
915 io_event_del(My_Connections[i].sock,
920 io_event_add(My_Connections[i].sock, IO_WANTREAD);
923 /* Set the timeout for reading from the network to 1 second,
924 * which is the granularity with witch we handle "penalty
925 * times" for example.
926 * Note: tv_sec/usec are undefined(!) after io_dispatch()
927 * returns, so we have to set it before each call to it! */
931 /* Wait for activity ... */
932 i = io_dispatch(&tv);
933 if (i == -1 && errno != EINTR) {
934 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
936 Log(LOG_ALERT, "%s exiting due to fatal errors!",
941 /* Should ngIRCd timeout when idle? */
942 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
943 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
944 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
946 Conf_IdleTimeout == 1 ? "" : "s");
947 NGIRCd_SignalQuit = true;
951 if (NGIRCd_SignalQuit)
952 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
953 else if (NGIRCd_SignalRestart)
954 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
959 * Write a text string into the socket of a connection.
961 * This function automatically appends CR+LF to the string and validates that
962 * the result is a valid IRC message (oversized messages are shortened, for
963 * example). Then it calls the Conn_Write() function to do the actual sending.
965 * @param Idx Index fo the connection.
966 * @param Format Format string, see printf().
967 * @returns true on success, false otherwise.
971 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
974 Conn_WriteStr(Idx, Format, va_alist)
980 char buffer[COMMAND_LEN];
989 assert( Idx > NONE );
990 assert( Format != NULL );
993 va_start( ap, Format );
997 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
998 if (r >= COMMAND_LEN - 2 || r == -1) {
1000 * The string that should be written to the socket is longer
1001 * than the allowed size of COMMAND_LEN bytes (including both
1002 * the CR and LF characters). This can be caused by the
1003 * IRC_WriteXXX() functions when the prefix of this server had
1004 * to be added to an already "quite long" command line which
1005 * has been received from a regular IRC client, for example.
1007 * We are not allowed to send such "oversized" messages to
1008 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
1009 * ("these messages SHALL NOT exceed 512 characters in length,
1010 * counting all characters including the trailing CR-LF").
1012 * So we have a big problem here: we should send more bytes
1013 * to the network than we are allowed to and we don't know
1014 * the originator (any more). The "old" behavior of blaming
1015 * the receiver ("next hop") is a bad idea (it could be just
1016 * an other server only routing the message!), so the only
1017 * option left is to shorten the string and to hope that the
1018 * result is still somewhat useful ...
1021 * C99 states that vsnprintf() "returns the number of characters
1022 * that would have been printed if the n were unlimited"; but
1023 * according to the Linux manual page "glibc until 2.0.6 would
1024 * return -1 when the output was truncated" -- so we have to
1025 * handle both cases ...
1029 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
1034 ptr = strchr(buffer + 1, ':');
1037 message = Conn_EncodingTo(Idx, ptr);
1039 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
1045 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
1048 len = strlcat( buffer, "\r\n", sizeof( buffer ));
1049 ok = Conn_Write(Idx, buffer, len);
1050 My_Connections[Idx].msg_out++;
1054 } /* Conn_WriteStr */
1057 Conn_Password( CONN_ID Idx )
1059 assert( Idx > NONE );
1060 if (My_Connections[Idx].pwd == NULL)
1063 return My_Connections[Idx].pwd;
1064 } /* Conn_Password */
1067 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
1069 assert( Idx > NONE );
1071 if (My_Connections[Idx].pwd)
1072 free(My_Connections[Idx].pwd);
1074 My_Connections[Idx].pwd = strdup(Pwd);
1075 if (My_Connections[Idx].pwd == NULL) {
1076 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
1079 } /* Conn_SetPassword */
1082 * Append Data to the outbound write buffer of a connection.
1084 * @param Idx Index of the connection.
1085 * @param Data pointer to the data.
1086 * @param Len length of Data.
1087 * @returns true on success, false otherwise.
1090 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
1093 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
1094 assert( Idx > NONE );
1095 assert( Data != NULL );
1098 /* Is the socket still open? A previous call to Conn_Write()
1099 * may have closed the connection due to a fatal error.
1100 * In this case it is sufficient to return an error, as well. */
1101 if (My_Connections[Idx].sock <= NONE) {
1102 LogDebug("Skipped write on closed socket (connection %d).", Idx);
1106 /* Make sure that there still exists a CLIENT structure associated
1107 * with this connection and check if this is a server or not: */
1108 c = Conn_GetClient(Idx);
1110 /* Servers do get special write buffer limits, so they can
1111 * generate all the messages that are required while peering. */
1112 if (Client_Type(c) == CLIENT_SERVER)
1113 writebuf_limit = WRITEBUFFER_SLINK_LEN;
1115 LogDebug("Write on socket without client (connection %d)!?", Idx);
1118 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1120 * Zip_Buffer() does all the dirty work for us: it flushes
1121 * the (pre-)compression buffers if required and handles
1122 * all error conditions. */
1123 if (!Zip_Buffer(Idx, Data, Len))
1129 /* Uncompressed link:
1130 * Check if outbound buffer has enough space for the data. */
1131 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
1132 WRITEBUFFER_FLUSH_LEN) {
1133 /* Buffer is full, flush it. Handle_Write deals with
1134 * low-level errors, if any. */
1135 if (!Handle_Write(Idx))
1139 /* When the write buffer is still too big after flushing it,
1140 * the connection will be killed. */
1141 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
1144 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
1145 Idx, writebuf_limit, Len,
1146 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
1147 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
1151 /* Copy data to write buffer */
1152 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
1155 My_Connections[Idx].bytes_out += Len;
1158 /* Adjust global write counter */
1166 * Shut down a connection.
1168 * @param Idx Connection index.
1169 * @param LogMsg Message to write to the log or NULL. If no LogMsg
1170 * is given, the FwdMsg is logged.
1171 * @param FwdMsg Message to forward to remote servers.
1172 * @param InformClient If true, inform the client on the connection which is
1173 * to be shut down of the reason (FwdMsg) and send
1174 * connection statistics before disconnecting it.
1177 Conn_Close( CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient )
1179 /* Close connection. Open pipes of asynchronous resolver
1180 * sub-processes are closed down. */
1186 double in_z_k, out_z_k;
1190 assert( Idx > NONE );
1192 /* Is this link already shutting down? */
1193 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1194 /* Conn_Close() has been called recursively for this link;
1195 * probable reason: Handle_Write() failed -- see below. */
1196 LogDebug("Recursive request to close connection %d!", Idx );
1200 assert( My_Connections[Idx].sock > NONE );
1202 /* Mark link as "closing" */
1203 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1205 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1206 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1207 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1209 /* Search client, if any */
1210 c = Conn_GetClient( Idx );
1212 /* Should the client be informed? */
1215 /* Send statistics to client if registered as user: */
1216 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1218 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1219 Client_ID(Client_ThisServer()), Client_ID(c),
1221 (double)My_Connections[Idx].bytes_in / 1024,
1222 (double)My_Connections[Idx].bytes_out / 1024);
1225 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1227 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
1229 Conn_WriteStr(Idx, "ERROR :Closing connection");
1232 /* Try to write out the write buffer. Note: Handle_Write() eventually
1233 * removes the CLIENT structure associated with this connection if an
1234 * error occurs! So we have to re-check if there is still an valid
1235 * CLIENT structure after calling Handle_Write() ...*/
1236 (void)Handle_Write( Idx );
1238 /* Search client, if any (re-check!) */
1239 c = Conn_GetClient( Idx );
1241 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1242 LogDebug("SSL connection %d shutting down ...", Idx);
1243 ConnSSL_Free(&My_Connections[Idx]);
1246 /* Shut down socket */
1247 if (! io_close(My_Connections[Idx].sock)) {
1248 /* Oops, we can't close the socket!? This is ... ugly! */
1250 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1251 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1252 port, strerror(errno));
1255 /* Mark socket as invalid: */
1256 My_Connections[Idx].sock = NONE;
1258 /* If there is still a client, unregister it now */
1260 Client_Destroy(c, LogMsg, FwdMsg, true);
1262 /* Calculate statistics and log information */
1263 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1264 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1266 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1267 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1268 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1269 /* Make sure that no division by zero can occur during
1270 * the calculation of in_p and out_p: in_z_k and out_z_k
1271 * are non-zero, that's guaranteed by the protocol until
1272 * compression can be enabled. */
1277 in_p = (int)(( in_k * 100 ) / in_z_k );
1278 out_p = (int)(( out_k * 100 ) / out_z_k );
1280 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1281 Idx, My_Connections[Idx].host, port,
1282 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1288 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1289 Idx, My_Connections[Idx].host, port,
1293 /* Servers: Modify time of next connect attempt? */
1294 Conf_UnsetServer( Idx );
1297 /* Clean up zlib, if link was compressed */
1298 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1299 inflateEnd( &My_Connections[Idx].zip.in );
1300 deflateEnd( &My_Connections[Idx].zip.out );
1301 array_free(&My_Connections[Idx].zip.rbuf);
1302 array_free(&My_Connections[Idx].zip.wbuf);
1306 array_free(&My_Connections[Idx].rbuf);
1307 array_free(&My_Connections[Idx].wbuf);
1308 if (My_Connections[Idx].pwd != NULL)
1309 free(My_Connections[Idx].pwd);
1311 /* Clean up connection structure (=free it) */
1312 Init_Conn_Struct( Idx );
1314 assert(NumConnections > 0);
1317 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1318 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1320 idle_t = NumConnections > 0 ? 0 : time(NULL);
1325 * Get current number of connections.
1327 * @returns Number of current connections.
1332 return NumConnections;
1337 * Get number of maximum simultaneous connections.
1339 * @returns Number of maximum simultaneous connections.
1344 return NumConnectionsMax;
1345 } /* Conn_CountMax */
1349 * Get number of connections accepted since the daemon startet.
1351 * @returns Number of connections accepted.
1354 Conn_CountAccepted(void)
1356 return NumConnectionsAccepted;
1357 } /* Conn_CountAccepted */
1361 * Synchronize established connections and configured server structures
1362 * after a configuration update and store the correct connection IDs, if any.
1365 Conn_SyncServerStruct(void)
1371 for (i = 0; i < Pool_Size; i++) {
1372 if (My_Connections[i].sock == NONE)
1376 client = Conn_GetClient(i);
1377 if (!client || Client_Type(client) != CLIENT_SERVER)
1380 for (c = 0; c < MAX_SERVERS; c++) {
1381 /* Configured server? */
1382 if (!Conf_Server[c].host[0])
1385 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1386 Conf_Server[c].conn_id = i;
1389 } /* SyncServerStruct */
1393 * Get IP address string of a connection.
1395 * @param Idx Connection index.
1396 * @return Pointer to a global buffer containing the IP address as string.
1399 Conn_GetIPAInfo(CONN_ID Idx)
1402 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1407 * Send out data of write buffer; connect new sockets.
1409 * @param Idx Connection index.
1410 * @returns true on success, false otherwise.
1413 Handle_Write( CONN_ID Idx )
1418 assert( Idx > NONE );
1419 if ( My_Connections[Idx].sock < 0 ) {
1420 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1423 assert( My_Connections[Idx].sock > NONE );
1425 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1428 if (wdatalen == 0) {
1429 /* Write buffer is empty, so we try to flush the compression
1430 * buffer and get some data to work with from there :-) */
1431 if (!Zip_Flush(Idx))
1434 /* Now the write buffer most probably has changed: */
1435 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1439 if (wdatalen == 0) {
1440 /* Still no data, fine. */
1441 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1447 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1452 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1453 len = ConnSSL_Write(&My_Connections[Idx], array_start(&My_Connections[Idx].wbuf), wdatalen);
1457 len = write(My_Connections[Idx].sock,
1458 array_start(&My_Connections[Idx].wbuf), wdatalen );
1461 if (errno == EAGAIN || errno == EINTR)
1464 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1466 "Write error on connection %d (socket %d): %s!",
1467 Idx, My_Connections[Idx].sock, strerror(errno));
1469 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1470 Idx, My_Connections[Idx].sock, strerror(errno));
1471 Conn_Close(Idx, "Write error", NULL, false);
1475 /* move any data not yet written to beginning */
1476 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1479 } /* Handle_Write */
1483 * Count established connections to a specific IP address.
1485 * @returns Number of established connections.
1488 Count_Connections(ng_ipaddr_t *a)
1493 for (i = 0; i < Pool_Size; i++) {
1494 if (My_Connections[i].sock <= NONE)
1496 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1500 } /* Count_Connections */
1504 * Initialize new client connection on a listening socket.
1506 * @param Sock Listening socket descriptor.
1507 * @param IsSSL true if this socket expects SSL-encrypted data.
1508 * @returns Accepted socket descriptor or -1 on error.
1511 New_Connection(int Sock, UNUSED bool IsSSL)
1514 struct request_info req;
1516 ng_ipaddr_t new_addr;
1517 char ip_str[NG_INET_ADDRSTRLEN];
1518 int new_sock, new_sock_len;
1522 assert(Sock > NONE);
1524 LogDebug("Accepting new connection on socket %d ...", Sock);
1526 new_sock_len = (int)sizeof(new_addr);
1527 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1528 (socklen_t *)&new_sock_len);
1530 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1533 NumConnectionsAccepted++;
1535 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1536 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1537 Simple_Message(new_sock, "ERROR :Internal Server Error");
1543 /* Validate socket using TCP Wrappers */
1544 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1545 RQ_CLIENT_SIN, &new_addr, NULL);
1547 if (!hosts_access(&req)) {
1549 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1550 Simple_Message(new_sock, "ERROR :Connection refused");
1556 if (!Init_Socket(new_sock))
1559 /* Check global connection limit */
1560 if ((Conf_MaxConnections > 0) &&
1561 (NumConnections >= (size_t) Conf_MaxConnections)) {
1562 Log(LOG_ALERT, "Can't accept connection: limit (%d) reached!",
1563 Conf_MaxConnections);
1564 Simple_Message(new_sock, "ERROR :Connection limit reached");
1569 /* Check IP-based connection limit */
1570 cnt = Count_Connections(&new_addr);
1571 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1572 /* Access denied, too many connections from this IP address! */
1574 "Refused connection from %s: too may connections (%ld) from this IP address!",
1576 Simple_Message(new_sock,
1577 "ERROR :Connection refused, too many connections from your IP address");
1582 if (new_sock >= Pool_Size) {
1583 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
1584 (size_t) new_sock)) {
1586 "Can't allocate memory! [New_Connection]");
1587 Simple_Message(new_sock, "ERROR: Internal error");
1591 LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
1592 new_sock, array_length(&My_ConnArray,
1593 sizeof(CONNECTION)), array_bytes(&My_ConnArray));
1595 /* Adjust pointer to new block */
1596 My_Connections = array_start(&My_ConnArray);
1597 while (Pool_Size <= new_sock)
1598 Init_Conn_Struct(Pool_Size++);
1601 /* register callback */
1602 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1604 "Can't accept connection: io_event_create failed!");
1605 Simple_Message(new_sock, "ERROR :Internal error");
1610 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1613 "Can't accept connection: can't create client structure!");
1614 Simple_Message(new_sock, "ERROR :Internal error");
1619 Init_Conn_Struct(new_sock);
1620 My_Connections[new_sock].sock = new_sock;
1621 My_Connections[new_sock].addr = new_addr;
1622 My_Connections[new_sock].client = c;
1624 /* Set initial hostname to IP address. This becomes overwritten when
1625 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1626 if (ng_ipaddr_af(&new_addr) != AF_INET)
1627 snprintf(My_Connections[new_sock].host,
1628 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1630 strlcpy(My_Connections[new_sock].host, ip_str,
1631 sizeof(My_Connections[new_sock].host));
1633 Client_SetHostname(c, My_Connections[new_sock].host);
1635 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1636 new_sock, My_Connections[new_sock].host,
1637 ng_ipaddr_getport(&new_addr), Sock);
1638 Account_Connection();
1641 /* Delay connection initalization until SSL handshake is finished */
1644 Conn_StartLogin(new_sock);
1647 } /* New_Connection */
1651 * Finish connection initialization, start resolver subprocess.
1653 * @param Idx Connection index.
1656 Conn_StartLogin(CONN_ID Idx)
1658 int ident_sock = -1;
1662 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1667 /* Should we make an IDENT request? */
1669 ident_sock = My_Connections[Idx].sock;
1672 if (Conf_NoticeAuth) {
1673 /* Send "NOTICE AUTH" messages to the client */
1676 (void)Conn_WriteStr(Idx,
1677 "NOTICE AUTH :*** Looking up your hostname and checking ident");
1680 (void)Conn_WriteStr(Idx,
1681 "NOTICE AUTH :*** Looking up your hostname");
1682 /* Send buffered data to the client, but break on errors
1683 * because Handle_Write() would have closed the connection
1684 * again in this case! */
1685 if (!Handle_Write(Idx))
1689 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1690 ident_sock, cb_Read_Resolver_Result);
1695 * Update global connection counters.
1698 Account_Connection(void)
1702 if (NumConnections > NumConnectionsMax)
1703 NumConnectionsMax = NumConnections;
1704 LogDebug("Total number of connections now %lu (max %lu).",
1705 NumConnections, NumConnectionsMax);
1706 } /* Account_Connection */
1710 * Translate socket handle into connection index.
1712 * @param Sock Socket handle.
1713 * @returns Connecion index or NONE, if no connection could be found.
1716 Socket2Index( int Sock )
1718 assert( Sock >= 0 );
1720 if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
1721 /* the Connection was already closed again, likely due to
1723 LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
1727 } /* Socket2Index */
1731 * Read data from the network to the read buffer. If an error occurs,
1732 * the socket of this connection will be shut down.
1734 * @param Idx Connection index.
1737 Read_Request( CONN_ID Idx )
1740 static const unsigned int maxbps = COMMAND_LEN / 2;
1741 char readbuf[READBUFFER_LEN];
1744 assert( Idx > NONE );
1745 assert( My_Connections[Idx].sock > NONE );
1748 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1749 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1751 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1754 /* Read buffer is full */
1756 "Receive buffer space exhausted (connection %d): %d bytes",
1757 Idx, array_bytes(&My_Connections[Idx].rbuf));
1758 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1763 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1764 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1767 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1769 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1770 My_Connections[Idx].host,
1771 ng_ipaddr_tostr(&My_Connections[Idx].addr), Idx);
1772 Conn_Close(Idx, NULL, "Client closed connection", false);
1777 if( errno == EAGAIN ) return;
1778 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1779 Idx, My_Connections[Idx].sock, strerror(errno));
1780 Conn_Close(Idx, "Read error", "Client closed connection",
1785 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1786 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1789 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1791 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1798 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1800 "Could not append received data to input buffer (connection %d): %d bytes!",
1802 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false );
1806 /* Update connection statistics */
1807 My_Connections[Idx].bytes_in += len;
1808 My_Connections[Idx].bps += Handle_Buffer(Idx);
1810 /* Make sure that there is still a valid client registered */
1811 c = Conn_GetClient(Idx);
1815 /* Update timestamp of last data received if this connection is
1816 * registered as a user, server or service connection. Don't update
1817 * otherwise, so users have at least Conf_PongTimeout seconds time to
1818 * register with the IRC server -- see Check_Connections().
1819 * Update "lastping", too, if time shifted backwards ... */
1820 if (Client_Type(c) == CLIENT_USER
1821 || Client_Type(c) == CLIENT_SERVER
1822 || Client_Type(c) == CLIENT_SERVICE) {
1824 if (My_Connections[Idx].lastdata != t)
1825 My_Connections[Idx].bps = 0;
1827 My_Connections[Idx].lastdata = t;
1828 if (My_Connections[Idx].lastping > t)
1829 My_Connections[Idx].lastping = t;
1832 /* Look at the data in the (read-) buffer of this connection */
1833 if (Client_Type(c) != CLIENT_SERVER
1834 && Client_Type(c) != CLIENT_UNKNOWNSERVER
1835 && Client_Type(c) != CLIENT_SERVICE
1836 && My_Connections[Idx].bps >= maxbps) {
1837 LogDebug("Throttling connection %d: BPS exceeded! (%u >= %u)",
1838 Idx, My_Connections[Idx].bps, maxbps);
1839 Conn_SetPenalty(Idx, 1);
1841 } /* Read_Request */
1845 * Handle all data in the connection read-buffer.
1847 * Data is processed until no complete command is left in the read buffer,
1848 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1849 * When a fatal error occurs, the connection is shut down.
1851 * @param Idx Index of the connection.
1852 * @returns Number of bytes processed.
1855 Handle_Buffer(CONN_ID Idx)
1858 char *ptr1, *ptr2, *first_eol;
1866 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1869 c = Conn_GetClient(Idx);
1870 starttime = time(NULL);
1874 /* Servers get special command limits that depend on the user count */
1875 switch (Client_Type(c)) {
1877 maxcmd = (int)(Client_UserCount() / 5)
1878 + MAX_COMMANDS_SERVER_MIN;
1879 /* Allow servers to handle even more commands while peering
1880 * to speed up server login and network synchronization. */
1881 if (Conn_LastPing(Idx) == 0)
1884 case CLIENT_SERVICE:
1885 maxcmd = MAX_COMMANDS_SERVICE; break;
1888 for (i=0; i < maxcmd; i++) {
1890 if (My_Connections[Idx].delaytime > starttime)
1893 /* Unpack compressed data, if compression is in use */
1894 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1895 /* When unzipping fails, Unzip_Buffer() shuts
1896 * down the connection itself */
1897 if (!Unzip_Buffer(Idx))
1902 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1905 /* Make sure that the buffer is NULL terminated */
1906 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1907 Conn_Close(Idx, NULL,
1908 "Can't allocate memory [Handle_Buffer]",
1913 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1914 * "IRC messages are always lines of characters terminated
1915 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1917 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1920 /* Check for non-RFC-compliant request (only CR or LF)?
1921 * Unfortunately, there are quite a few clients out there
1922 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1923 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1924 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1926 /* Check if there is a single CR or LF _before_ the
1927 * correct CR+LF line terminator: */
1928 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1929 if (first_eol < ptr) {
1930 /* Single CR or LF before CR+LF found */
1934 } else if (ptr1 || ptr2) {
1935 /* No CR+LF terminated command found, but single
1936 * CR or LF found ... */
1938 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1940 ptr = ptr1 ? ptr1 : ptr2;
1948 /* Complete (=line terminated) request found, handle it! */
1951 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1953 if (len > (COMMAND_LEN - 1)) {
1954 /* Request must not exceed 512 chars (incl. CR+LF!),
1955 * see RFC 2812. Disconnect Client if this happens. */
1957 "Request too long (connection %d): %d bytes (max. %d expected)!",
1958 Idx, array_bytes(&My_Connections[Idx].rbuf),
1960 Conn_Close(Idx, NULL, "Request too long", true);
1964 len_processed += (unsigned int)len;
1966 /* Request is empty (only '\r\n', '\r' or '\n');
1967 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1968 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1972 /* remember if stream is already compressed */
1973 old_z = My_Connections[Idx].options & CONN_ZIP;
1976 My_Connections[Idx].msg_in++;
1978 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1979 return 0; /* error -> connection has been closed */
1981 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1983 LogDebug("Connection %d: %d bytes left in read buffer.",
1984 Idx, array_bytes(&My_Connections[Idx].rbuf));
1987 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1988 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1989 /* The last command activated socket compression.
1990 * Data that was read after that needs to be copied
1991 * to the unzip buffer for decompression: */
1993 (&My_Connections[Idx].zip.rbuf,
1994 &My_Connections[Idx].rbuf)) {
1995 Conn_Close(Idx, NULL,
1996 "Can't allocate memory [Handle_Buffer]",
2001 array_trunc(&My_Connections[Idx].rbuf);
2003 ("Moved already received data (%u bytes) to uncompression buffer.",
2004 array_bytes(&My_Connections[Idx].zip.rbuf));
2008 return len_processed;
2009 } /* Handle_Buffer */
2013 * Check whether established connections are still alive or not.
2014 * If not, play PING-PONG first; and if that doesn't help either,
2015 * disconnect the respective peer.
2018 Check_Connections(void)
2024 for (i = 0; i < Pool_Size; i++) {
2025 if (My_Connections[i].sock < 0)
2028 c = Conn_GetClient(i);
2029 if (c && ((Client_Type(c) == CLIENT_USER)
2030 || (Client_Type(c) == CLIENT_SERVER)
2031 || (Client_Type(c) == CLIENT_SERVICE))) {
2032 /* connected User, Server or Service */
2033 if (My_Connections[i].lastping >
2034 My_Connections[i].lastdata) {
2035 /* We already sent a ping */
2036 if (My_Connections[i].lastping <
2037 time(NULL) - Conf_PongTimeout) {
2039 snprintf(msg, sizeof(msg),
2040 "Ping timeout: %d seconds",
2042 LogDebug("Connection %d: %s.", i, msg);
2043 Conn_Close(i, NULL, msg, true);
2045 } else if (My_Connections[i].lastdata <
2046 time(NULL) - Conf_PingTimeout) {
2047 /* We need to send a PING ... */
2048 LogDebug("Connection %d: sending PING ...", i);
2050 Conn_WriteStr(i, "PING :%s",
2051 Client_ID(Client_ThisServer()));
2054 /* The connection is not fully established yet, so
2055 * we don't do the PING-PONG game here but instead
2056 * disconnect the client after "a short time" if it's
2057 * still not registered. */
2059 if (My_Connections[i].lastdata <
2060 time(NULL) - Conf_PongTimeout) {
2062 ("Unregistered connection %d timed out ...",
2064 Conn_Close(i, NULL, "Timeout", false);
2068 } /* Check_Connections */
2072 * Check if further server links should be established.
2080 time_now = time(NULL);
2082 /* Check all configured servers */
2083 for (i = 0; i < MAX_SERVERS; i++) {
2084 if (Conf_Server[i].conn_id != NONE)
2085 continue; /* Already establishing or connected */
2086 if (!Conf_Server[i].host[0] || !Conf_Server[i].port > 0)
2087 continue; /* No host and/or port configured */
2088 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
2089 continue; /* Disabled configuration entry */
2090 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
2091 continue; /* We have to wait a little bit ... */
2093 /* Is there already a connection in this group? */
2094 if (Conf_Server[i].group > NONE) {
2095 for (n = 0; n < MAX_SERVERS; n++) {
2098 if ((Conf_Server[n].conn_id != NONE) &&
2099 (Conf_Server[n].group == Conf_Server[i].group))
2102 if (n < MAX_SERVERS)
2106 /* Okay, try to connect now */
2108 "Preparing to establish a new server link for \"%s\" ...",
2109 Conf_Server[i].name);
2110 Conf_Server[i].lasttry = time_now;
2111 Conf_Server[i].conn_id = SERVER_WAIT;
2112 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
2113 Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
2114 cb_Connect_to_Server);
2116 } /* Check_Servers */
2120 * Establish a new outgoing server connection.
2122 * @param Server Configuration index of the server.
2123 * @param dest Destination IP address to connect to.
2126 New_Server( int Server , ng_ipaddr_t *dest)
2128 /* Establish new server link */
2129 char ip_str[NG_INET_ADDRSTRLEN];
2130 int af_dest, res, new_sock;
2133 assert( Server > NONE );
2135 /* Make sure that the remote server hasn't re-linked to this server
2136 * asynchronously on its own */
2137 if (Conf_Server[Server].conn_id > NONE) {
2139 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
2143 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
2144 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
2145 Conf_Server[Server].conn_id = NONE;
2149 af_dest = ng_ipaddr_af(dest);
2150 new_sock = socket(af_dest, SOCK_STREAM, 0);
2153 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
2154 Conf_Server[Server].name, Conf_Server[Server].host,
2155 Conf_Server[Server].port, ip_str, new_sock);
2158 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
2159 af_dest, strerror(errno));
2160 Conf_Server[Server].conn_id = NONE;
2164 if (!Init_Socket(new_sock)) {
2165 Conf_Server[Server].conn_id = NONE;
2169 /* is a bind address configured? */
2170 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
2171 /* if yes, bind now. If it fails, warn and let connect() pick a source address */
2172 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
2173 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
2175 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
2176 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str, strerror(errno));
2178 ng_ipaddr_setport(dest, Conf_Server[Server].port);
2179 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
2180 if(( res != 0 ) && ( errno != EINPROGRESS )) {
2181 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2183 Conf_Server[Server].conn_id = NONE;
2187 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
2189 "Cannot allocate memory for server connection (socket %d)",
2192 Conf_Server[Server].conn_id = NONE;
2196 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2197 Log(LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
2199 Conf_Server[Server].conn_id = NONE;
2203 My_Connections = array_start(&My_ConnArray);
2205 assert(My_Connections[new_sock].sock <= 0);
2207 Init_Conn_Struct(new_sock);
2209 ng_ipaddr_tostr_r(dest, ip_str);
2210 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2212 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2214 Conf_Server[Server].conn_id = NONE;
2218 /* Conn_Close() decrements this counter again */
2219 Account_Connection();
2220 Client_SetIntroducer( c, c );
2221 Client_SetToken( c, TOKEN_OUTBOUND );
2223 /* Register connection */
2224 if (!Conf_SetServer(Server, new_sock))
2226 My_Connections[new_sock].sock = new_sock;
2227 My_Connections[new_sock].addr = *dest;
2228 My_Connections[new_sock].client = c;
2229 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2230 sizeof(My_Connections[new_sock].host ));
2233 if (Conf_Server[Server].SSLConnect && !ConnSSL_PrepareConnect( &My_Connections[new_sock],
2234 &Conf_Server[Server] ))
2236 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2237 Conn_Close( new_sock, "Could not initialize SSL for outgoing connection", NULL, false );
2238 Init_Conn_Struct( new_sock );
2239 Conf_Server[Server].conn_id = NONE;
2243 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2244 new_sock, My_Connections[new_sock].sock, NumConnections);
2245 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2250 * Initialize connection structure.
2252 * @param Idx Connection index.
2255 Init_Conn_Struct(CONN_ID Idx)
2257 time_t now = time(NULL);
2259 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2260 My_Connections[Idx].sock = -1;
2261 My_Connections[Idx].signon = now;
2262 My_Connections[Idx].lastdata = now;
2263 My_Connections[Idx].lastprivmsg = now;
2264 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2267 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2268 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2270 } /* Init_Conn_Struct */
2274 * Initialize options of a new socket.
2276 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2277 * The socket is automatically closed if a fatal error is encountered.
2279 * @param Sock Socket handle.
2280 * @returns false if socket was closed due to fatal error.
2283 Init_Socket( int Sock )
2287 if (!io_setnonblock(Sock)) {
2288 Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
2293 /* Don't block this port after socket shutdown */
2295 if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
2297 Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
2298 /* ignore this error */
2301 /* Set type of service (TOS) */
2302 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2303 value = IPTOS_LOWDELAY;
2304 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2305 (socklen_t) sizeof(value))) {
2306 LogDebug("Can't set socket option IP_TOS: %s!",
2308 /* ignore this error */
2310 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2319 * Read results of a resolver sub-process and try to initiate a new server
2322 * @param fd File descriptor of the pipe to the sub-process.
2323 * @param events (ignored IO specification)
2326 cb_Connect_to_Server(int fd, UNUSED short events)
2328 /* Read result of resolver sub-process from pipe and start connection */
2331 ng_ipaddr_t dest_addrs[4]; /* we can handle at most 3; but we read up to
2332 four so we can log the 'more than we can handle'
2333 condition. First result is tried immediately, rest
2334 is saved for later if needed. */
2336 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
2338 for (i=0; i < MAX_SERVERS; i++) {
2339 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2343 if( i >= MAX_SERVERS) {
2344 /* Ops, no matching server found?! */
2346 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2350 /* Read result from pipe */
2351 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2352 Proc_Close(&Conf_Server[i].res_stat);
2354 /* Error resolving hostname: reset server structure */
2355 Conf_Server[i].conn_id = NONE;
2359 assert((len % sizeof(ng_ipaddr_t)) == 0);
2361 LogDebug("Got result from resolver: %u structs (%u bytes).", len/sizeof(ng_ipaddr_t), len);
2363 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2364 if (len > sizeof(ng_ipaddr_t)) {
2365 /* more than one address for this hostname, remember them
2366 * in case first address is unreachable/not available */
2367 len -= sizeof(ng_ipaddr_t);
2368 if (len > sizeof(Conf_Server[i].dst_addr)) {
2369 len = sizeof(Conf_Server[i].dst_addr);
2371 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2373 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2376 New_Server(i, dest_addrs);
2377 } /* cb_Read_Forward_Lookup */
2381 * Read results of a resolver sub-process from the pipe and update the
2382 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2384 * @param r_fd File descriptor of the pipe to the sub-process.
2385 * @param events (ignored IO specification)
2388 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2395 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2398 char readbuf[HOST_LEN + 1];
2401 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2402 i = Conn_GetFromProc(r_fd);
2404 /* Ops, none found? Probably the connection has already
2405 * been closed!? We'll ignore that ... */
2407 LogDebug("Resolver: Got callback for unknown connection!?");
2411 /* Read result from pipe */
2412 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2413 Proc_Close(&My_Connections[i].proc_stat);
2417 readbuf[len] = '\0';
2418 identptr = strchr(readbuf, '\n');
2419 assert(identptr != NULL);
2421 Log( LOG_CRIT, "Resolver: Got malformed result!");
2426 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2427 /* Okay, we got a complete result: this is a host name for outgoing
2428 * connections and a host name and IDENT user name (if enabled) for
2429 * incoming connections.*/
2430 assert ( My_Connections[i].sock >= 0 );
2431 /* Incoming connection. Search client ... */
2432 c = Conn_GetClient( i );
2433 assert( c != NULL );
2435 /* Only update client information of unregistered clients.
2436 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2437 * the resolver results, so we don't have to worry to override settings
2438 * from these commands here. */
2439 if(Client_Type(c) == CLIENT_UNKNOWN) {
2440 strlcpy(My_Connections[i].host, readbuf,
2441 sizeof(My_Connections[i].host));
2442 Client_SetHostname(c, readbuf);
2443 if (Conf_NoticeAuth)
2444 (void)Conn_WriteStr(i,
2445 "NOTICE AUTH :*** Found your hostname: %s",
2446 My_Connections[i].host);
2452 if ((*ptr < '0' || *ptr > '9') &&
2453 (*ptr < 'A' || *ptr > 'Z') &&
2454 (*ptr < 'a' || *ptr > 'z'))
2459 /* Erroneous IDENT reply */
2461 "Got invalid IDENT reply for connection %d! Ignored.",
2465 "IDENT lookup for connection %d: \"%s\".",
2467 Client_SetUser(c, identptr, true);
2469 if (Conf_NoticeAuth) {
2470 (void)Conn_WriteStr(i,
2471 "NOTICE AUTH :*** Got %sident response%s%s",
2472 *ptr ? "invalid " : "",
2474 *ptr ? "" : identptr);
2476 } else if(Conf_Ident) {
2477 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2478 if (Conf_NoticeAuth)
2479 (void)Conn_WriteStr(i,
2480 "NOTICE AUTH :*** No ident response");
2484 if (Conf_NoticeAuth) {
2485 /* Send buffered data to the client, but break on
2486 * errors because Handle_Write() would have closed
2487 * the connection again in this case! */
2488 if (!Handle_Write(i))
2492 Class_HandleServerBans(c);
2496 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2498 } /* cb_Read_Resolver_Result */
2502 * Write a "simple" (error) message to a socket.
2504 * The message is sent without using the connection write buffers, without
2505 * compression/encryption, and even without any error reporting. It is
2506 * designed for error messages of e.g. New_Connection().
2508 * @param Sock Socket handle.
2509 * @param Msg Message string to send.
2512 Simple_Message(int Sock, const char *Msg)
2514 char buf[COMMAND_LEN];
2517 assert(Sock > NONE);
2518 assert(Msg != NULL);
2520 strlcpy(buf, Msg, sizeof buf - 2);
2521 len = strlcat(buf, "\r\n", sizeof buf);
2522 if (write(Sock, buf, len) < 0) {
2523 /* Because this function most probably got called to log
2524 * an error message, any write error is ignored here to
2525 * avoid an endless loop. But casting the result of write()
2526 * to "void" doesn't satisfy the GNU C code attribute
2527 * "warn_unused_result" which is used by some versions of
2528 * glibc (e.g. 2.11.1), therefore this silly error
2529 * "handling" code here :-( */
2532 } /* Simple_Error */
2536 * Get CLIENT structure that belongs to a local connection identified by its
2537 * index number. Each connection belongs to a client by definition, so it is
2538 * not required that the caller checks for NULL return values.
2540 * @param Idx Connection index number.
2541 * @returns Pointer to CLIENT structure.
2544 Conn_GetClient( CONN_ID Idx )
2549 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2551 return c ? c->client : NULL;
2555 * Get PROC_STAT sub-process structure of a connection.
2557 * @param Idx Connection index number.
2558 * @returns PROC_STAT structure.
2561 Conn_GetProcStat(CONN_ID Idx)
2566 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2568 return &c->proc_stat;
2569 } /* Conn_GetProcStat */
2573 * Get CONN_ID from file descriptor associated to a subprocess structure.
2575 * @param fd File descriptor.
2576 * @returns CONN_ID or NONE (-1).
2579 Conn_GetFromProc(int fd)
2584 for (i = 0; i < Pool_Size; i++) {
2585 if ((My_Connections[i].sock != NONE)
2586 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2590 } /* Conn_GetFromProc */
2596 Conn_GetAuthPing(CONN_ID Idx)
2598 assert (Idx != NONE);
2599 return My_Connections[Idx].auth_ping;
2600 } /* Conn_GetAuthPing */
2603 Conn_SetAuthPing(CONN_ID Idx, long ID)
2605 assert (Idx != NONE);
2606 My_Connections[Idx].auth_ping = ID;
2607 } /* Conn_SetAuthPing */
2615 * Get information about used SSL cipher.
2617 * @param Idx Connection index number.
2618 * @param buf Buffer for returned information text.
2619 * @param len Size of return buffer "buf".
2620 * @returns true on success, false otherwise.
2623 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2627 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2628 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2633 * Check if a connection is SSL-enabled or not.
2635 * @param Idx Connection index number.
2636 * @return true if connection is SSL-enabled, false otherwise.
2639 Conn_UsesSSL(CONN_ID Idx)
2643 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2644 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2649 Conn_GetCertFp(CONN_ID Idx)
2653 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2654 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2659 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2663 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2664 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2668 Conn_UsesSSL(UNUSED CONN_ID Idx)
2675 Conn_GetCertFp(UNUSED CONN_ID Idx)
2682 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2692 * Dump internal state of the "connection module".
2695 Conn_DebugDump(void)
2699 Log(LOG_DEBUG, "Connection status:");
2700 for (i = 0; i < Pool_Size; i++) {
2701 if (My_Connections[i].sock == NONE)
2704 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2705 My_Connections[i].sock, My_Connections[i].host,
2706 My_Connections[i].lastdata, My_Connections[i].lastping,
2707 My_Connections[i].delaytime, My_Connections[i].flag,
2708 My_Connections[i].options, My_Connections[i].bps,
2709 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2711 } /* Conn_DumpClients */