2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2019 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.
18 * Connection management
21 /* Additionan debug messages related to buffer handling: 0=off / 1=on */
22 #define DEBUG_BUFFER 0
36 #include <sys/socket.h>
38 #include <sys/types.h>
40 #include <netinet/in.h>
42 #ifdef HAVE_NETINET_IP_H
43 # ifdef HAVE_NETINET_IN_SYSTM_H
44 # include <netinet/in_systm.h>
46 # include <netinet/ip.h>
50 # include <tcpd.h> /* for TCP Wrappers */
58 # include "conn-encoding.h"
62 #include "conn-func.h"
65 #include "ng_ipaddr.h"
69 #define SERVER_WAIT (NONE - 1) /** "Wait for outgoing connection" flag */
71 #define MAX_COMMANDS 3 /** Max. commands per loop for users */
72 #define MAX_COMMANDS_SERVER_MIN 10 /** Min. commands per loop for servers */
73 #define MAX_COMMANDS_SERVICE 10 /** Max. commands per loop for services */
75 #define SD_LISTEN_FDS_START 3 /** systemd(8) socket activation offset */
77 #define THROTTLE_CMDS 1 /** Throttling: max commands reached */
78 #define THROTTLE_BPS 2 /** Throttling: max bps reached */
80 static bool Handle_Write PARAMS(( CONN_ID Idx ));
81 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
82 static int New_Connection PARAMS(( int Sock, bool IsSSL ));
83 static CONN_ID Socket2Index PARAMS(( int Sock ));
84 static void Read_Request PARAMS(( CONN_ID Idx ));
85 static unsigned int Handle_Buffer PARAMS(( CONN_ID Idx ));
86 static void Check_Connections PARAMS(( void ));
87 static void Check_Servers PARAMS(( void ));
88 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
89 static bool Init_Socket PARAMS(( int Sock ));
90 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
91 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
92 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
93 static void Account_Connection PARAMS((void));
94 static void Throttle_Connection PARAMS((const CONN_ID Idx, CLIENT *Client,
95 const int Reason, unsigned int Value));
97 static array My_Listeners;
98 static array My_ConnArray;
99 static size_t NumConnections, NumConnectionsMax, NumConnectionsAccepted;
102 int allow_severity = LOG_INFO;
103 int deny_severity = LOG_ERR;
106 static void server_login PARAMS((CONN_ID idx));
109 extern struct SSLOptions Conf_SSLOptions;
110 static bool SSL_WantRead PARAMS((const CONNECTION *c));
111 static bool SSL_WantWrite PARAMS((const CONNECTION *c));
112 static void cb_listen_ssl PARAMS((int sock, short irrelevant));
113 static void cb_connserver_login_ssl PARAMS((int sock, short what));
114 static void cb_clientserver_ssl PARAMS((int sock, short what));
116 static void cb_Read_Resolver_Result PARAMS((int sock, UNUSED short what));
117 static void cb_Connect_to_Server PARAMS((int sock, UNUSED short what));
118 static void cb_clientserver PARAMS((int sock, short what));
123 * Get number of sockets available from systemd(8).
125 * ngIRCd needs to implement its own sd_listen_fds(3) function and can't
126 * use the one provided by systemd itself, because the sockets will be
127 * used in a forked child process with a new PID, and this would trigger
128 * an error in the standard implementation.
130 * @return Number of sockets available, -1 if sockets have already been
131 * initialized, or 0 when no sockets have been passed.
134 my_sd_listen_fds(void)
139 /* Check if LISTEN_PID exists; but we ignore the result, because
140 * normally ngircd forks a child before checking this, and therefore
141 * the PID set in the environment is always wrong ... */
142 e = getenv("LISTEN_PID");
146 e = getenv("LISTEN_FDS");
151 unsetenv("LISTEN_FDS");
158 * IO callback for listening sockets: handle new connections. This callback
159 * gets called when a new non-SSL connection should be accepted.
161 * @param sock Socket descriptor.
162 * @param irrelevant (ignored IO specification)
165 cb_listen(int sock, short irrelevant)
168 (void) New_Connection(sock, false);
172 * IO callback for new outgoing non-SSL server connections.
174 * @param sock Socket descriptor.
175 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
178 cb_connserver(int sock, UNUSED short what)
180 int res, err, server;
182 CONN_ID idx = Socket2Index( sock );
189 assert(what & IO_WANTWRITE);
191 /* Make sure that the server is still configured; it could have been
192 * removed in the meantime! */
193 server = Conf_GetServer(idx);
195 Log(LOG_ERR, "Connection on socket %d to \"%s\" aborted!",
196 sock, My_Connections[idx].host);
197 Conn_Close(idx, "Connection aborted", NULL, false);
201 /* connect() finished, get result. */
202 sock_len = (socklen_t)sizeof(err);
203 res = getsockopt(My_Connections[idx].sock, SOL_SOCKET, SO_ERROR,
205 assert(sock_len == sizeof(err));
207 /* Error while connecting? */
208 if ((res != 0) || (err != 0)) {
210 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
211 idx, strerror(errno));
214 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
215 My_Connections[idx].host, Conf_Server[server].port,
218 Conn_Close(idx, "Can't connect", NULL, false);
220 if (ng_ipaddr_af(&Conf_Server[server].dst_addr[0])) {
221 /* more addresses to try... */
222 New_Server(server, &Conf_Server[server].dst_addr[0]);
223 /* connection to dst_addr[0] is now in progress, so
224 * remove this address... */
225 Conf_Server[server].dst_addr[0] =
226 Conf_Server[server].dst_addr[1];
227 memset(&Conf_Server[server].dst_addr[1], 0,
228 sizeof(Conf_Server[server].dst_addr[1]));
233 /* connect() succeeded, remove all additional addresses */
234 memset(&Conf_Server[server].dst_addr, 0,
235 sizeof(Conf_Server[server].dst_addr));
237 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
239 if ( Conn_OPTION_ISSET( &My_Connections[idx], CONN_SSL_CONNECT )) {
240 io_event_setcb( sock, cb_connserver_login_ssl );
241 io_event_add( sock, IO_WANTWRITE|IO_WANTREAD );
249 * Login to a remote server.
251 * @param idx Connection index.
254 server_login(CONN_ID idx)
257 "Connection %d (socket %d) with \"%s:%d\" established. Now logging in ...",
258 idx, My_Connections[idx].sock, My_Connections[idx].host,
259 Conf_Server[Conf_GetServer(idx)].port);
261 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
262 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
264 /* Send PASS and SERVER command to peer */
265 Conn_WriteStr(idx, "PASS %s %s",
266 Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID);
267 Conn_WriteStr(idx, "SERVER %s :%s",
268 Conf_ServerName, Conf_ServerInfo);
272 * IO callback for established non-SSL client and server connections.
274 * @param sock Socket descriptor.
275 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
278 cb_clientserver(int sock, short what)
280 CONN_ID idx = Socket2Index(sock);
288 if (what & IO_WANTREAD
289 || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE))) {
290 /* if TLS layer needs to write additional data, call
291 * Read_Request() instead so that SSL/TLS can continue */
295 if (what & IO_WANTREAD)
298 if (what & IO_WANTWRITE)
303 * Initialize connection module.
310 /* Initialize the "connection pool".
311 * FIXME: My_Connetions/Pool_Size is needed by other parts of the
312 * code; remove them! */
314 size = Conf_MaxConnections > 0 ? Conf_MaxConnections : CONNECTION_POOL;
315 if (Socket2Index(size) <= NONE) {
316 Log(LOG_EMERG, "Failed to initialize connection pool!");
320 /* Initialize "listener" array. */
321 array_free( &My_Listeners );
325 * Clean up connection module.
332 Conn_ExitListeners();
334 LogDebug("Shutting down all connections ..." );
335 for( idx = 0; idx < Pool_Size; idx++ ) {
336 if( My_Connections[idx].sock > NONE ) {
337 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
338 "Server going down (restarting)":"Server going down", true );
342 array_free(&My_ConnArray);
343 My_Connections = NULL;
345 io_library_shutdown();
349 * Close all sockets (file descriptors) of open connections.
350 * This is useful in forked child processes, for example, to make sure that
351 * they don't hold connections open that the main process wants to close.
354 Conn_CloseAllSockets(int ExceptOf)
358 for(idx = 0; idx < Pool_Size; idx++) {
359 if(My_Connections[idx].sock > NONE &&
360 My_Connections[idx].sock != ExceptOf)
361 close(My_Connections[idx].sock);
366 * Initialize listening ports.
368 * @param a Array containing the ports the daemon should listen on.
369 * @param listen_addr Address the socket should listen on (can be "0.0.0.0").
370 * @param func IO callback function to register.
371 * @returns Number of listening sockets created.
374 Init_Listeners(array *a, const char *listen_addr, void (*func)(int,short))
376 unsigned int created = 0;
381 len = array_length(a, sizeof (UINT16));
382 port = array_start(a);
384 fd = NewListener(listen_addr, *port);
389 if (!io_event_create( fd, IO_WANTREAD, func )) {
391 "io_event_create(): Can't add fd %d (port %u): %s!",
392 fd, (unsigned int) *port, strerror(errno));
404 * Initialize all listening sockets.
406 * @returns Number of created listening sockets
409 Conn_InitListeners( void )
411 /* Initialize ports on which the server should accept connections */
412 unsigned int created = 0;
413 char *af_str, *copy, *listen_addr;
414 int count, fd, i, addr_len;
417 assert(Conf_ListenAddress);
419 count = my_sd_listen_fds();
422 "Not re-initializing listening sockets of systemd(8) ...");
426 /* systemd(8) passed sockets to us, so don't try to initialize
427 * listening sockets on our own but use the passed ones */
428 LogDebug("Initializing %d systemd sockets ...", count);
429 for (i = 0; i < count; i++) {
430 fd = SD_LISTEN_FDS_START + i;
431 addr_len = (int)sizeof(addr);
432 getsockname(fd, (struct sockaddr *)&addr,
433 (socklen_t*)&addr_len);
435 if (addr.sin4.sin_family != AF_INET
436 && addr.sin4.sin_family != AF_INET6)
438 if (addr.sin4.sin_family != AF_INET)
441 /* Socket is of unsupported type! For example,
442 * systemd passed in an IPv6 socket but ngIRCd
443 * isn't compiled with IPv6 support. */
444 switch (addr.sin4.sin_family)
446 case AF_UNSPEC: af_str = "AF_UNSPEC"; break;
447 case AF_UNIX: af_str = "AF_UNIX"; break;
448 case AF_INET: af_str = "AF_INET"; break;
450 case AF_INET6: af_str = "AF_INET6"; break;
453 case AF_NETLINK: af_str = "AF_NETLINK"; break;
455 default: af_str = "unknown"; break;
458 "Socket %d is of unsupported type \"%s\" (%d), have to ignore it!",
459 fd, af_str, addr.sin4.sin_family);
465 if (!io_event_create(fd, IO_WANTREAD, cb_listen)) {
467 "io_event_create(): Can't add fd %d: %s!",
468 fd, strerror(errno));
472 "Initialized socket %d from systemd(8): %s:%d.", fd,
473 ng_ipaddr_tostr(&addr), ng_ipaddr_getport(&addr));
479 /* not using systemd socket activation, initialize listening sockets: */
481 /* can't use Conf_ListenAddress directly, see below */
482 copy = strdup(Conf_ListenAddress);
484 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress,
488 listen_addr = strtok(copy, ",");
490 while (listen_addr) {
491 ngt_TrimStr(listen_addr);
493 created += Init_Listeners(&Conf_ListenPorts,
494 listen_addr, cb_listen);
496 created += Init_Listeners(&Conf_SSLOptions.ListenPorts,
497 listen_addr, cb_listen_ssl);
501 listen_addr = strtok(NULL, ",");
504 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
505 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
506 * Instead, free() takes place in conf.c, before the config file
507 * is being parsed. */
511 } /* Conn_InitListeners */
514 * Shut down all listening sockets.
517 Conn_ExitListeners( void )
519 /* Close down all listening sockets */
523 /* Get number of listening sockets to shut down. There can be none
524 * if ngIRCd has been "socket activated" by systemd. */
525 arraylen = array_length(&My_Listeners, sizeof (int));
530 "Shutting down all listening sockets (%d total) ...", arraylen);
531 fd = array_start(&My_Listeners);
536 LogDebug("Listening socket %d closed.", *fd );
539 array_free(&My_Listeners);
540 } /* Conn_ExitListeners */
543 * Bind a socket to a specific (source) address.
545 * @param addr Address structure.
546 * @param listen_addrstr Source address as string.
547 * @param Port Port number.
548 * @returns true on success, false otherwise.
551 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
555 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
557 assert(listen_addrstr);
559 "Can't listen on [%s]:%u: Failed to parse IP address!",
560 listen_addrstr, Port);
566 * Set a socket to "IPv6 only". If the given socket doesn't belong to the
567 * AF_INET6 family, or the operating system doesn't support this functionality,
568 * this function retruns silently.
570 * @param af Address family of the socket.
571 * @param sock Socket handle.
574 set_v6_only(int af, int sock)
576 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
582 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
583 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
591 * Initialize new listening port.
593 * @param listen_addr Local address to bind the socet to (can be 0.0.0.0).
594 * @param Port Port number on which the new socket should be listening.
595 * @returns file descriptor of the socket or -1 on failure.
598 NewListener(const char *listen_addr, UINT16 Port)
600 /* Create new listening socket on specified port */
604 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
607 af = ng_ipaddr_af(&addr);
608 sock = socket(af, SOCK_STREAM, 0);
610 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af,
615 set_v6_only(af, sock);
617 if (!Init_Socket(sock))
620 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
621 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s!",
622 ng_ipaddr_tostr(&addr), Port, strerror(errno));
627 if (listen(sock, 10) != 0) {
628 Log(LOG_CRIT, "Can't listen on socket: %s!", strerror(errno));
633 /* keep fd in list so we can close it when ngircd restarts/shuts down */
634 if (!array_catb(&My_Listeners, (char *)&sock, sizeof(int))) {
635 Log(LOG_CRIT, "Can't add socket to My_Listeners array: %s!",
641 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
642 ng_ipaddr_tostr(&addr), Port, sock);
647 * "Main Loop": Loop until shutdown or restart is signalled.
649 * This function loops until a shutdown or restart of ngIRCd is signalled and
650 * calls io_dispatch() to check for readable and writable sockets every second.
651 * It checks for status changes on pending connections (e. g. when a hostname
652 * has been resolved), checks for "penalties" and timeouts, and handles the
663 Log(LOG_NOTICE, "Server \"%s\" (on \"%s\") ready.",
664 Client_ID(Client_ThisServer()), Client_Hostname(Client_ThisServer()));
666 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
669 /* Check configured servers and established links */
673 /* Expire outdated class/list items */
676 /* Look for non-empty read buffers ... */
677 for (i = 0; i < Pool_Size; i++) {
678 if ((My_Connections[i].sock > NONE)
679 && (array_bytes(&My_Connections[i].rbuf) > 0)) {
680 /* ... and try to handle the received data */
685 /* Look for non-empty write buffers ... */
686 for (i = 0; i < Pool_Size; i++) {
687 if (My_Connections[i].sock <= NONE)
690 wdatalen = array_bytes(&My_Connections[i].wbuf);
693 array_bytes(&My_Connections[i].zip.wbuf) > 0)
699 if (SSL_WantRead(&My_Connections[i]))
702 io_event_add(My_Connections[i].sock,
707 /* Check from which sockets we possibly could read ... */
708 for (i = 0; i < Pool_Size; i++) {
709 if (My_Connections[i].sock <= NONE)
712 if (SSL_WantWrite(&My_Connections[i]))
713 /* TLS/SSL layer needs to write data; deal
714 * with this first! */
717 if (Proc_InProgress(&My_Connections[i].proc_stat)) {
718 /* Wait for completion of forked subprocess
719 * and ignore the socket in the meantime ... */
720 io_event_del(My_Connections[i].sock,
725 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
726 /* Wait for completion of connect() ... */
729 if (My_Connections[i].delaytime > t) {
730 /* There is a "penalty time" set: ignore socket! */
731 io_event_del(My_Connections[i].sock,
736 io_event_add(My_Connections[i].sock, IO_WANTREAD);
739 /* Set the timeout for reading from the network to 1 second,
740 * which is the granularity with witch we handle "penalty
741 * times" for example.
742 * Note: tv_sec/usec are undefined(!) after io_dispatch()
743 * returns, so we have to set it before each call to it! */
747 /* Wait for activity ... */
748 i = io_dispatch(&tv);
749 if (i == -1 && errno != EINTR) {
750 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
752 Log(LOG_ALERT, "%s exiting due to fatal errors!",
757 /* Should ngIRCd timeout when idle? */
758 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
759 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
760 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
762 Conf_IdleTimeout == 1 ? "" : "s");
763 NGIRCd_SignalQuit = true;
767 if (NGIRCd_SignalQuit)
768 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
769 else if (NGIRCd_SignalRestart)
770 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
774 * Write a text string into the socket of a connection.
776 * This function automatically appends CR+LF to the string and validates that
777 * the result is a valid IRC message (oversized messages are shortened, for
778 * example). Then it calls the Conn_Write() function to do the actual sending.
780 * @param Idx Index fo the connection.
781 * @param Format Format string, see printf().
782 * @returns true on success, false otherwise.
786 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
789 Conn_WriteStr(Idx, Format, va_alist)
795 char buffer[COMMAND_LEN];
804 assert( Idx > NONE );
805 assert( Format != NULL );
808 va_start( ap, Format );
812 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
813 if (r >= COMMAND_LEN - 2 || r == -1) {
815 * The string that should be written to the socket is longer
816 * than the allowed size of COMMAND_LEN bytes (including both
817 * the CR and LF characters). This can be caused by the
818 * IRC_WriteXXX() functions when the prefix of this server had
819 * to be added to an already "quite long" command line which
820 * has been received from a regular IRC client, for example.
822 * We are not allowed to send such "oversized" messages to
823 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
824 * ("these messages SHALL NOT exceed 512 characters in length,
825 * counting all characters including the trailing CR-LF").
827 * So we have a big problem here: we should send more bytes
828 * to the network than we are allowed to and we don't know
829 * the originator (any more). The "old" behavior of blaming
830 * the receiver ("next hop") is a bad idea (it could be just
831 * an other server only routing the message!), so the only
832 * option left is to shorten the string and to hope that the
833 * result is still somewhat useful ...
836 * C99 states that vsnprintf() "returns the number of characters
837 * that would have been printed if the n were unlimited"; but
838 * according to the Linux manual page "glibc until 2.0.6 would
839 * return -1 when the output was truncated" -- so we have to
840 * handle both cases ...
844 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
849 ptr = strchr(buffer + 1, ':');
852 message = Conn_EncodingTo(Idx, ptr);
854 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
860 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
863 len = strlcat( buffer, "\r\n", sizeof( buffer ));
864 ok = Conn_Write(Idx, buffer, len);
865 My_Connections[Idx].msg_out++;
869 } /* Conn_WriteStr */
872 Conn_Password( CONN_ID Idx )
874 assert( Idx > NONE );
875 if (My_Connections[Idx].pwd == NULL)
878 return My_Connections[Idx].pwd;
879 } /* Conn_Password */
882 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
884 assert( Idx > NONE );
886 if (My_Connections[Idx].pwd)
887 free(My_Connections[Idx].pwd);
889 My_Connections[Idx].pwd = strdup(Pwd);
890 if (My_Connections[Idx].pwd == NULL) {
891 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
894 } /* Conn_SetPassword */
897 * Append Data to the outbound write buffer of a connection.
899 * @param Idx Index of the connection.
900 * @param Data pointer to the data.
901 * @param Len length of Data.
902 * @returns true on success, false otherwise.
905 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
908 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
909 assert( Idx > NONE );
910 assert( Data != NULL );
913 /* Is the socket still open? A previous call to Conn_Write()
914 * may have closed the connection due to a fatal error.
915 * In this case it is sufficient to return an error, as well. */
916 if (My_Connections[Idx].sock <= NONE) {
917 LogDebug("Skipped write on closed socket (connection %d).", Idx);
921 /* Make sure that there still exists a CLIENT structure associated
922 * with this connection and check if this is a server or not: */
923 c = Conn_GetClient(Idx);
925 /* Servers do get special write buffer limits, so they can
926 * generate all the messages that are required while peering. */
927 if (Client_Type(c) == CLIENT_SERVER)
928 writebuf_limit = WRITEBUFFER_SLINK_LEN;
930 LogDebug("Write on socket without client (connection %d)!?", Idx);
933 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
935 * Zip_Buffer() does all the dirty work for us: it flushes
936 * the (pre-)compression buffers if required and handles
937 * all error conditions. */
938 if (!Zip_Buffer(Idx, Data, Len))
944 /* Uncompressed link:
945 * Check if outbound buffer has enough space for the data. */
946 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
947 WRITEBUFFER_FLUSH_LEN) {
948 /* Buffer is full, flush it. Handle_Write deals with
949 * low-level errors, if any. */
950 if (!Handle_Write(Idx))
954 /* When the write buffer is still too big after flushing it,
955 * the connection will be killed. */
956 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
959 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
960 Idx, writebuf_limit, Len,
961 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
962 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
966 /* Copy data to write buffer */
967 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
970 My_Connections[Idx].bytes_out += Len;
973 /* Adjust global write counter */
980 * Shut down a connection.
982 * @param Idx Connection index.
983 * @param LogMsg Message to write to the log or NULL. If no LogMsg
984 * is given, the FwdMsg is logged.
985 * @param FwdMsg Message to forward to remote servers.
986 * @param InformClient If true, inform the client on the connection which is
987 * to be shut down of the reason (FwdMsg) and send
988 * connection statistics before disconnecting it.
991 Conn_Close(CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient)
993 /* Close connection. Open pipes of asynchronous resolver
994 * sub-processes are closed down. */
1000 double in_z_k, out_z_k;
1004 assert( Idx > NONE );
1006 /* Is this link already shutting down? */
1007 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1008 /* Conn_Close() has been called recursively for this link;
1009 * probable reason: Handle_Write() failed -- see below. */
1010 LogDebug("Recursive request to close connection %d!", Idx );
1014 assert( My_Connections[Idx].sock > NONE );
1016 /* Mark link as "closing" */
1017 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1019 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1020 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1021 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1023 /* Search client, if any */
1024 c = Conn_GetClient( Idx );
1026 /* Should the client be informed? */
1029 /* Send statistics to client if registered as user: */
1030 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1032 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1033 Client_ID(Client_ThisServer()), Client_ID(c),
1035 (double)My_Connections[Idx].bytes_in / 1024,
1036 (double)My_Connections[Idx].bytes_out / 1024);
1039 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1041 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
1043 Conn_WriteStr(Idx, "ERROR :Closing connection");
1046 /* Try to write out the write buffer. Note: Handle_Write() eventually
1047 * removes the CLIENT structure associated with this connection if an
1048 * error occurs! So we have to re-check if there is still an valid
1049 * CLIENT structure after calling Handle_Write() ...*/
1050 (void)Handle_Write( Idx );
1052 /* Search client, if any (re-check!) */
1053 c = Conn_GetClient( Idx );
1055 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1056 LogDebug("SSL connection %d shutting down ...", Idx);
1057 ConnSSL_Free(&My_Connections[Idx]);
1060 /* Shut down socket */
1061 if (! io_close(My_Connections[Idx].sock)) {
1062 /* Oops, we can't close the socket!? This is ... ugly! */
1064 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1065 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1066 port, strerror(errno));
1069 /* Mark socket as invalid: */
1070 My_Connections[Idx].sock = NONE;
1072 /* If there is still a client, unregister it now */
1074 Client_Destroy(c, LogMsg, FwdMsg, true);
1076 /* Calculate statistics and log information */
1077 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1078 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1080 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1081 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1082 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1083 /* Make sure that no division by zero can occur during
1084 * the calculation of in_p and out_p: in_z_k and out_z_k
1085 * are non-zero, that's guaranteed by the protocol until
1086 * compression can be enabled. */
1091 in_p = (int)(( in_k * 100 ) / in_z_k );
1092 out_p = (int)(( out_k * 100 ) / out_z_k );
1094 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1095 Idx, My_Connections[Idx].host, port,
1096 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1102 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1103 Idx, My_Connections[Idx].host, port,
1107 /* Servers: Modify time of next connect attempt? */
1108 Conf_UnsetServer( Idx );
1111 /* Clean up zlib, if link was compressed */
1112 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1113 inflateEnd( &My_Connections[Idx].zip.in );
1114 deflateEnd( &My_Connections[Idx].zip.out );
1115 array_free(&My_Connections[Idx].zip.rbuf);
1116 array_free(&My_Connections[Idx].zip.wbuf);
1120 array_free(&My_Connections[Idx].rbuf);
1121 array_free(&My_Connections[Idx].wbuf);
1122 if (My_Connections[Idx].pwd != NULL)
1123 free(My_Connections[Idx].pwd);
1125 /* Clean up connection structure (=free it) */
1126 Init_Conn_Struct( Idx );
1128 assert(NumConnections > 0);
1131 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1132 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1134 idle_t = NumConnections > 0 ? 0 : time(NULL);
1138 * Get current number of connections.
1140 * @returns Number of current connections.
1145 return NumConnections;
1149 * Get number of maximum simultaneous connections.
1151 * @returns Number of maximum simultaneous connections.
1156 return NumConnectionsMax;
1157 } /* Conn_CountMax */
1160 * Get number of connections accepted since the daemon startet.
1162 * @returns Number of connections accepted.
1165 Conn_CountAccepted(void)
1167 return NumConnectionsAccepted;
1168 } /* Conn_CountAccepted */
1171 * Synchronize established connections and configured server structures
1172 * after a configuration update and store the correct connection IDs, if any.
1175 Conn_SyncServerStruct(void)
1181 for (i = 0; i < Pool_Size; i++) {
1182 if (My_Connections[i].sock == NONE)
1186 client = Conn_GetClient(i);
1187 if (!client || Client_Type(client) != CLIENT_SERVER)
1190 for (c = 0; c < MAX_SERVERS; c++) {
1191 /* Configured server? */
1192 if (!Conf_Server[c].host[0])
1195 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1196 Conf_Server[c].conn_id = i;
1199 } /* SyncServerStruct */
1202 * Get IP address string of a connection.
1204 * @param Idx Connection index.
1205 * @return Pointer to a global buffer containing the IP address as string.
1208 Conn_GetIPAInfo(CONN_ID Idx)
1211 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1215 * Send out data of write buffer; connect new sockets.
1217 * @param Idx Connection index.
1218 * @returns true on success, false otherwise.
1221 Handle_Write( CONN_ID Idx )
1226 assert( Idx > NONE );
1227 if ( My_Connections[Idx].sock < 0 ) {
1228 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1231 assert( My_Connections[Idx].sock > NONE );
1233 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1236 if (wdatalen == 0) {
1237 /* Write buffer is empty, so we try to flush the compression
1238 * buffer and get some data to work with from there :-) */
1239 if (!Zip_Flush(Idx))
1242 /* Now the write buffer most probably has changed: */
1243 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1247 if (wdatalen == 0) {
1248 /* Still no data, fine. */
1249 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1255 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1260 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1261 len = ConnSSL_Write(&My_Connections[Idx],
1262 array_start(&My_Connections[Idx].wbuf),
1267 len = write(My_Connections[Idx].sock,
1268 array_start(&My_Connections[Idx].wbuf), wdatalen );
1271 if (errno == EAGAIN || errno == EINTR)
1274 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1276 "Write error on connection %d (socket %d): %s!",
1277 Idx, My_Connections[Idx].sock, strerror(errno));
1279 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1280 Idx, My_Connections[Idx].sock, strerror(errno));
1281 Conn_Close(Idx, "Write error", NULL, false);
1285 /* move any data not yet written to beginning */
1286 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1289 } /* Handle_Write */
1292 * Count established connections to a specific IP address.
1294 * @returns Number of established connections.
1297 Count_Connections(ng_ipaddr_t *a)
1302 for (i = 0; i < Pool_Size; i++) {
1303 if (My_Connections[i].sock <= NONE)
1305 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1309 } /* Count_Connections */
1312 * Initialize new client connection on a listening socket.
1314 * @param Sock Listening socket descriptor.
1315 * @param IsSSL true if this socket expects SSL-encrypted data.
1316 * @returns Accepted socket descriptor or -1 on error.
1319 New_Connection(int Sock, UNUSED bool IsSSL)
1322 struct request_info req;
1324 ng_ipaddr_t new_addr;
1325 char ip_str[NG_INET_ADDRSTRLEN];
1326 int new_sock, new_sock_len;
1330 assert(Sock > NONE);
1332 LogDebug("Accepting new connection on socket %d ...", Sock);
1334 new_sock_len = (int)sizeof(new_addr);
1335 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1336 (socklen_t *)&new_sock_len);
1338 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1341 NumConnectionsAccepted++;
1343 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1344 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1345 Simple_Message(new_sock, "ERROR :Internal Server Error");
1351 /* Validate socket using TCP Wrappers */
1352 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1353 RQ_CLIENT_SIN, &new_addr, NULL);
1355 if (!hosts_access(&req)) {
1357 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1358 Simple_Message(new_sock, "ERROR :Connection refused");
1364 if (!Init_Socket(new_sock))
1367 /* Check global connection limit */
1368 if ((Conf_MaxConnections > 0) &&
1369 (NumConnections >= (size_t) Conf_MaxConnections)) {
1370 Log(LOG_ALERT, "Can't accept new connection on socket %d: Limit (%d) reached!",
1371 Sock, Conf_MaxConnections);
1372 Simple_Message(new_sock, "ERROR :Connection limit reached");
1377 /* Check IP-based connection limit */
1378 cnt = Count_Connections(&new_addr);
1379 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1380 /* Access denied, too many connections from this IP address! */
1382 "Refused connection from %s: too may connections (%ld) from this IP address!",
1384 Simple_Message(new_sock,
1385 "ERROR :Connection refused, too many connections from your IP address");
1390 if (Socket2Index(new_sock) <= NONE) {
1391 Simple_Message(new_sock, "ERROR: Internal error");
1396 /* register callback */
1397 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1399 "Can't accept connection: io_event_create failed!");
1400 Simple_Message(new_sock, "ERROR :Internal error");
1405 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1408 "Can't accept connection: can't create client structure!");
1409 Simple_Message(new_sock, "ERROR :Internal error");
1414 Init_Conn_Struct(new_sock);
1415 My_Connections[new_sock].sock = new_sock;
1416 My_Connections[new_sock].addr = new_addr;
1417 My_Connections[new_sock].client = c;
1419 /* Set initial hostname to IP address. This becomes overwritten when
1420 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1421 if (ng_ipaddr_af(&new_addr) != AF_INET)
1422 snprintf(My_Connections[new_sock].host,
1423 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1425 strlcpy(My_Connections[new_sock].host, ip_str,
1426 sizeof(My_Connections[new_sock].host));
1428 Client_SetHostname(c, My_Connections[new_sock].host);
1430 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1431 new_sock, My_Connections[new_sock].host,
1432 ng_ipaddr_getport(&new_addr), Sock);
1433 Account_Connection();
1436 /* Delay connection initalization until SSL handshake is finished */
1439 Conn_StartLogin(new_sock);
1442 } /* New_Connection */
1445 * Finish connection initialization, start resolver subprocess.
1447 * @param Idx Connection index.
1450 Conn_StartLogin(CONN_ID Idx)
1452 int ident_sock = -1;
1456 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1461 /* Should we make an IDENT request? */
1463 ident_sock = My_Connections[Idx].sock;
1466 if (Conf_NoticeBeforeRegistration) {
1467 /* Send "NOTICE *" messages to the client */
1470 (void)Conn_WriteStr(Idx,
1471 "NOTICE * :*** Looking up your hostname and checking ident");
1474 (void)Conn_WriteStr(Idx,
1475 "NOTICE * :*** Looking up your hostname");
1476 /* Send buffered data to the client, but break on errors
1477 * because Handle_Write() would have closed the connection
1478 * again in this case! */
1479 if (!Handle_Write(Idx))
1483 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1484 ident_sock, cb_Read_Resolver_Result);
1488 * Update global connection counters.
1491 Account_Connection(void)
1495 if (NumConnections > NumConnectionsMax)
1496 NumConnectionsMax = NumConnections;
1497 LogDebug("Total number of connections now %lu (max %lu).",
1498 NumConnections, NumConnectionsMax);
1499 } /* Account_Connection */
1502 * Translate socket handle into connection index (for historical reasons, it is
1503 * a 1:1 mapping today) and enlarge the "connection pool" accordingly.
1505 * @param Sock Socket handle.
1506 * @returns Connecion index or NONE when the pool is too small.
1509 Socket2Index( int Sock )
1512 assert(Pool_Size >= 0);
1514 if (Sock < Pool_Size)
1517 /* Try to allocate more memory ... */
1518 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Sock)) {
1520 "Can't allocate memory to enlarge connection pool!");
1523 LogDebug("Enlarged connection pool for %ld sockets (%ld items, %ld bytes)",
1524 Sock, array_length(&My_ConnArray, sizeof(CONNECTION)),
1525 array_bytes(&My_ConnArray));
1527 /* Adjust pointer to new block, update size and initialize new items. */
1528 My_Connections = array_start(&My_ConnArray);
1529 while (Pool_Size <= Sock)
1530 Init_Conn_Struct(Pool_Size++);
1536 * Read data from the network to the read buffer. If an error occurs,
1537 * the socket of this connection will be shut down.
1539 * @param Idx Connection index.
1542 Read_Request( CONN_ID Idx )
1545 static const unsigned int maxbps = COMMAND_LEN / 2;
1546 char readbuf[READBUFFER_LEN];
1549 assert( Idx > NONE );
1550 assert( My_Connections[Idx].sock > NONE );
1553 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1554 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1556 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1559 /* Read buffer is full */
1561 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1562 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1563 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1568 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1569 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1572 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1574 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1575 My_Connections[Idx].host,
1576 ng_ipaddr_getport(&My_Connections[Idx].addr), Idx);
1577 Conn_Close(Idx, NULL, "Client closed connection", false);
1582 if( errno == EAGAIN ) return;
1583 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1584 Idx, My_Connections[Idx].sock, strerror(errno));
1585 Conn_Close(Idx, "Read error", "Client closed connection",
1590 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1591 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1594 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1596 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1603 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1605 "Could not append received data to input buffer (connection %d): %d bytes!",
1607 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1612 /* Update connection statistics */
1613 My_Connections[Idx].bytes_in += len;
1615 /* Handle read buffer */
1616 My_Connections[Idx].bps += Handle_Buffer(Idx);
1618 /* Make sure that there is still a valid client registered */
1619 c = Conn_GetClient(Idx);
1623 /* Update timestamp of last data received if this connection is
1624 * registered as a user, server or service connection. Don't update
1625 * otherwise, so users have at least Conf_PongTimeout seconds time to
1626 * register with the IRC server -- see Check_Connections().
1627 * Update "lastping", too, if time shifted backwards ... */
1628 if (Client_Type(c) == CLIENT_USER
1629 || Client_Type(c) == CLIENT_SERVER
1630 || Client_Type(c) == CLIENT_SERVICE) {
1632 if (My_Connections[Idx].lastdata != t)
1633 My_Connections[Idx].bps = 0;
1635 My_Connections[Idx].lastdata = t;
1636 if (My_Connections[Idx].lastping > t)
1637 My_Connections[Idx].lastping = t;
1640 /* Look at the data in the (read-) buffer of this connection */
1641 if (My_Connections[Idx].bps >= maxbps)
1642 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1643 } /* Read_Request */
1646 * Handle all data in the connection read-buffer.
1648 * Data is processed until no complete command is left in the read buffer,
1649 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1650 * When a fatal error occurs, the connection is shut down.
1652 * @param Idx Index of the connection.
1653 * @returns Number of bytes processed.
1656 Handle_Buffer(CONN_ID Idx)
1659 char *ptr1, *ptr2, *first_eol;
1667 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1670 c = Conn_GetClient(Idx);
1671 starttime = time(NULL);
1675 /* Servers get special command limits that depend on the user count */
1676 switch (Client_Type(c)) {
1678 maxcmd = (int)(Client_UserCount() / 5)
1679 + MAX_COMMANDS_SERVER_MIN;
1680 /* Allow servers to handle even more commands while peering
1681 * to speed up server login and network synchronization. */
1682 if (Conn_LastPing(Idx) == 0)
1685 case CLIENT_SERVICE:
1686 maxcmd = MAX_COMMANDS_SERVICE;
1689 if (Client_HasMode(c, 'F'))
1690 maxcmd = MAX_COMMANDS_SERVICE;
1694 for (i=0; i < maxcmd; i++) {
1696 if (My_Connections[Idx].delaytime > starttime)
1699 /* Unpack compressed data, if compression is in use */
1700 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1701 /* When unzipping fails, Unzip_Buffer() shuts
1702 * down the connection itself */
1703 if (!Unzip_Buffer(Idx))
1708 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1711 /* Make sure that the buffer is NULL terminated */
1712 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1713 Conn_Close(Idx, NULL,
1714 "Can't allocate memory [Handle_Buffer]",
1719 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1720 * "IRC messages are always lines of characters terminated
1721 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1723 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1726 /* Check for non-RFC-compliant request (only CR or LF)?
1727 * Unfortunately, there are quite a few clients out there
1728 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1729 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1730 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1732 /* Check if there is a single CR or LF _before_ the
1733 * correct CR+LF line terminator: */
1734 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1735 if (first_eol < ptr) {
1736 /* Single CR or LF before CR+LF found */
1740 } else if (ptr1 || ptr2) {
1741 /* No CR+LF terminated command found, but single
1742 * CR or LF found ... */
1744 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1746 ptr = ptr1 ? ptr1 : ptr2;
1754 /* Complete (=line terminated) request found, handle it! */
1757 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1759 if (len > (COMMAND_LEN - 1)) {
1760 /* Request must not exceed 512 chars (incl. CR+LF!),
1761 * see RFC 2812. Disconnect Client if this happens. */
1763 "Request too long (connection %d): %d bytes (max. %d expected)!",
1764 Idx, array_bytes(&My_Connections[Idx].rbuf),
1766 Conn_Close(Idx, NULL, "Request too long", true);
1770 len_processed += (unsigned int)len;
1772 /* Request is empty (only '\r\n', '\r' or '\n');
1773 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1774 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1778 /* remember if stream is already compressed */
1779 old_z = My_Connections[Idx].options & CONN_ZIP;
1782 My_Connections[Idx].msg_in++;
1784 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1785 return 0; /* error -> connection has been closed */
1787 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1789 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1790 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1791 /* The last command activated socket compression.
1792 * Data that was read after that needs to be copied
1793 * to the unzip buffer for decompression: */
1795 (&My_Connections[Idx].zip.rbuf,
1796 &My_Connections[Idx].rbuf)) {
1797 Conn_Close(Idx, NULL,
1798 "Can't allocate memory [Handle_Buffer]",
1803 array_trunc(&My_Connections[Idx].rbuf);
1805 ("Moved already received data (%u bytes) to uncompression buffer.",
1806 array_bytes(&My_Connections[Idx].zip.rbuf));
1811 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1812 Idx, i, maxcmd, len_processed,
1813 array_bytes(&My_Connections[Idx].rbuf));
1816 /* If data has been processed but there is still data in the read
1817 * buffer, the command limit triggered. Enforce the penalty time: */
1818 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1819 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1821 return len_processed;
1822 } /* Handle_Buffer */
1825 * Check whether established connections are still alive or not.
1826 * If not, play PING-PONG first; and if that doesn't help either,
1827 * disconnect the respective peer.
1830 Check_Connections(void)
1836 for (i = 0; i < Pool_Size; i++) {
1837 if (My_Connections[i].sock < 0)
1840 c = Conn_GetClient(i);
1841 if (c && ((Client_Type(c) == CLIENT_USER)
1842 || (Client_Type(c) == CLIENT_SERVER)
1843 || (Client_Type(c) == CLIENT_SERVICE))) {
1844 /* connected User, Server or Service */
1845 if (My_Connections[i].lastping >
1846 My_Connections[i].lastdata) {
1847 /* We already sent a ping */
1848 if (My_Connections[i].lastping <
1849 time(NULL) - Conf_PongTimeout) {
1851 snprintf(msg, sizeof(msg),
1852 "Ping timeout: %d seconds",
1854 LogDebug("Connection %d: %s.", i, msg);
1855 Conn_Close(i, NULL, msg, true);
1857 } else if (My_Connections[i].lastdata <
1858 time(NULL) - Conf_PingTimeout) {
1859 /* We need to send a PING ... */
1860 LogDebug("Connection %d: sending PING ...", i);
1862 Conn_WriteStr(i, "PING :%s",
1863 Client_ID(Client_ThisServer()));
1866 /* The connection is not fully established yet, so
1867 * we don't do the PING-PONG game here but instead
1868 * disconnect the client after "a short time" if it's
1869 * still not registered. */
1871 if (My_Connections[i].lastdata <
1872 time(NULL) - Conf_PongTimeout) {
1874 ("Unregistered connection %d timed out ...",
1876 Conn_Close(i, NULL, "Timeout", false);
1880 } /* Check_Connections */
1883 * Check if further server links should be established.
1891 time_now = time(NULL);
1893 /* Check all configured servers */
1894 for (i = 0; i < MAX_SERVERS; i++) {
1895 if (Conf_Server[i].conn_id != NONE)
1896 continue; /* Already establishing or connected */
1897 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1898 continue; /* No host and/or port configured */
1899 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1900 continue; /* Disabled configuration entry */
1901 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1902 continue; /* We have to wait a little bit ... */
1904 /* Is there already a connection in this group? */
1905 if (Conf_Server[i].group > NONE) {
1906 for (n = 0; n < MAX_SERVERS; n++) {
1909 if ((Conf_Server[n].conn_id != NONE) &&
1910 (Conf_Server[n].group == Conf_Server[i].group))
1913 if (n < MAX_SERVERS)
1917 /* Okay, try to connect now */
1919 "Preparing to establish a new server link for \"%s\" ...",
1920 Conf_Server[i].name);
1921 Conf_Server[i].lasttry = time_now;
1922 Conf_Server[i].conn_id = SERVER_WAIT;
1923 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1925 /* Start resolver subprocess ... */
1926 if (!Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1927 cb_Connect_to_Server))
1928 Conf_Server[i].conn_id = NONE;
1930 } /* Check_Servers */
1933 * Establish a new outgoing server connection.
1935 * @param Server Configuration index of the server.
1936 * @param dest Destination IP address to connect to.
1939 New_Server( int Server , ng_ipaddr_t *dest)
1941 /* Establish new server link */
1942 char ip_str[NG_INET_ADDRSTRLEN];
1943 int af_dest, res, new_sock;
1946 assert( Server > NONE );
1948 /* Make sure that the remote server hasn't re-linked to this server
1949 * asynchronously on its own */
1950 if (Conf_Server[Server].conn_id > NONE) {
1952 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
1956 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1957 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1958 Conf_Server[Server].conn_id = NONE;
1962 af_dest = ng_ipaddr_af(dest);
1963 new_sock = socket(af_dest, SOCK_STREAM, 0);
1966 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
1967 Conf_Server[Server].name, Conf_Server[Server].host,
1968 Conf_Server[Server].port, ip_str, new_sock);
1971 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
1972 af_dest, strerror(errno));
1973 Conf_Server[Server].conn_id = NONE;
1977 if (!Init_Socket(new_sock)) {
1978 Conf_Server[Server].conn_id = NONE;
1982 /* is a bind address configured? */
1983 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1985 /* if yes, bind now. If it fails, warn and let connect() pick a
1987 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1988 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1990 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1991 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
1994 ng_ipaddr_setport(dest, Conf_Server[Server].port);
1995 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
1996 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1997 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
1999 Conf_Server[Server].conn_id = NONE;
2003 if (Socket2Index(new_sock) <= NONE) {
2005 Conf_Server[Server].conn_id = NONE;
2009 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2010 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2013 Conf_Server[Server].conn_id = NONE;
2017 assert(My_Connections[new_sock].sock <= 0);
2019 Init_Conn_Struct(new_sock);
2021 ng_ipaddr_tostr_r(dest, ip_str);
2022 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2024 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2026 Conf_Server[Server].conn_id = NONE;
2030 /* Conn_Close() decrements this counter again */
2031 Account_Connection();
2032 Client_SetIntroducer( c, c );
2033 Client_SetToken( c, TOKEN_OUTBOUND );
2035 /* Register connection */
2036 if (!Conf_SetServer(Server, new_sock))
2038 My_Connections[new_sock].sock = new_sock;
2039 My_Connections[new_sock].addr = *dest;
2040 My_Connections[new_sock].client = c;
2041 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2042 sizeof(My_Connections[new_sock].host ));
2045 if (Conf_Server[Server].SSLConnect &&
2046 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2048 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2049 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2051 Init_Conn_Struct(new_sock);
2052 Conf_Server[Server].conn_id = NONE;
2056 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2057 new_sock, My_Connections[new_sock].sock, NumConnections);
2058 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2062 * Initialize connection structure.
2064 * @param Idx Connection index.
2067 Init_Conn_Struct(CONN_ID Idx)
2069 time_t now = time(NULL);
2071 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2072 My_Connections[Idx].sock = -1;
2073 My_Connections[Idx].signon = now;
2074 My_Connections[Idx].lastdata = now;
2075 My_Connections[Idx].lastprivmsg = now;
2076 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2079 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2080 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2082 } /* Init_Conn_Struct */
2085 * Initialize options of a new socket.
2087 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2088 * The socket is automatically closed if a fatal error is encountered.
2090 * @param Sock Socket handle.
2091 * @returns false if socket was closed due to fatal error.
2094 Init_Socket( int Sock )
2098 if (!io_setnonblock(Sock)) {
2099 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2105 /* Don't block this port after socket shutdown */
2107 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2108 (socklen_t)sizeof(value)) != 0) {
2109 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2111 /* ignore this error */
2114 /* Set type of service (TOS) */
2115 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2116 value = IPTOS_LOWDELAY;
2117 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2118 (socklen_t) sizeof(value))) {
2119 LogDebug("Can't set socket option IP_TOS: %s!",
2121 /* ignore this error */
2123 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2131 * Read results of a resolver sub-process and try to initiate a new server
2134 * @param fd File descriptor of the pipe to the sub-process.
2135 * @param events (ignored IO specification)
2138 cb_Connect_to_Server(int fd, UNUSED short events)
2143 /* we can handle at most 3 addresses; but we read up to 4 so we can
2144 * log the 'more than we can handle' condition. First result is tried
2145 * immediately, rest is saved for later if needed. */
2146 ng_ipaddr_t dest_addrs[4];
2148 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2151 for (i=0; i < MAX_SERVERS; i++) {
2152 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2156 if( i >= MAX_SERVERS) {
2157 /* Ops, no matching server found?! */
2159 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2163 /* Read result from pipe */
2164 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2165 Proc_Close(&Conf_Server[i].res_stat);
2167 /* Error resolving hostname: reset server structure */
2168 Conf_Server[i].conn_id = NONE;
2172 assert((len % sizeof(ng_ipaddr_t)) == 0);
2174 LogDebug("Got result from resolver: %u structs (%u bytes).",
2175 len/sizeof(ng_ipaddr_t), len);
2177 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2178 if (len > sizeof(ng_ipaddr_t)) {
2179 /* more than one address for this hostname, remember them
2180 * in case first address is unreachable/not available */
2181 len -= sizeof(ng_ipaddr_t);
2182 if (len > sizeof(Conf_Server[i].dst_addr)) {
2183 len = sizeof(Conf_Server[i].dst_addr);
2185 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2187 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2190 New_Server(i, dest_addrs);
2191 } /* cb_Read_Forward_Lookup */
2194 * Read results of a resolver sub-process from the pipe and update the
2195 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2197 * @param r_fd File descriptor of the pipe to the sub-process.
2198 * @param events (ignored IO specification)
2201 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2208 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2211 char readbuf[HOST_LEN + 1];
2214 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2215 i = Conn_GetFromProc(r_fd);
2217 /* Ops, none found? Probably the connection has already
2218 * been closed!? We'll ignore that ... */
2220 LogDebug("Resolver: Got callback for unknown connection!?");
2224 /* Read result from pipe */
2225 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2226 Proc_Close(&My_Connections[i].proc_stat);
2230 readbuf[len] = '\0';
2231 identptr = strchr(readbuf, '\n');
2232 assert(identptr != NULL);
2234 Log( LOG_CRIT, "Resolver: Got malformed result!");
2239 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2240 /* Okay, we got a complete result: this is a host name for outgoing
2241 * connections and a host name and IDENT user name (if enabled) for
2242 * incoming connections.*/
2243 assert ( My_Connections[i].sock >= 0 );
2244 /* Incoming connection. Search client ... */
2245 c = Conn_GetClient( i );
2246 assert( c != NULL );
2248 /* Only update client information of unregistered clients.
2249 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2250 * the resolver results, so we don't have to worry to override settings
2251 * from these commands here. */
2252 if(Client_Type(c) == CLIENT_UNKNOWN) {
2253 strlcpy(My_Connections[i].host, readbuf,
2254 sizeof(My_Connections[i].host));
2255 Client_SetHostname(c, readbuf);
2256 if (Conf_NoticeBeforeRegistration)
2257 (void)Conn_WriteStr(i,
2258 "NOTICE * :*** Found your hostname: %s",
2259 My_Connections[i].host);
2265 if ((*ptr < '0' || *ptr > '9') &&
2266 (*ptr < 'A' || *ptr > 'Z') &&
2267 (*ptr < 'a' || *ptr > 'z'))
2272 /* Erroneous IDENT reply */
2274 "Got invalid IDENT reply for connection %d! Ignored.",
2278 "IDENT lookup for connection %d: \"%s\".",
2280 Client_SetUser(c, identptr, true);
2282 if (Conf_NoticeBeforeRegistration) {
2283 (void)Conn_WriteStr(i,
2284 "NOTICE * :*** Got %sident response%s%s",
2285 *ptr ? "invalid " : "",
2287 *ptr ? "" : identptr);
2289 } else if(Conf_Ident) {
2290 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2291 if (Conf_NoticeBeforeRegistration)
2292 (void)Conn_WriteStr(i,
2293 "NOTICE * :*** No ident response");
2297 if (Conf_NoticeBeforeRegistration) {
2298 /* Send buffered data to the client, but break on
2299 * errors because Handle_Write() would have closed
2300 * the connection again in this case! */
2301 if (!Handle_Write(i))
2305 Class_HandleServerBans(c);
2309 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2311 } /* cb_Read_Resolver_Result */
2314 * Write a "simple" (error) message to a socket.
2316 * The message is sent without using the connection write buffers, without
2317 * compression/encryption, and even without any error reporting. It is
2318 * designed for error messages of e.g. New_Connection().
2320 * @param Sock Socket handle.
2321 * @param Msg Message string to send.
2324 Simple_Message(int Sock, const char *Msg)
2326 char buf[COMMAND_LEN];
2329 assert(Sock > NONE);
2330 assert(Msg != NULL);
2332 strlcpy(buf, Msg, sizeof buf - 2);
2333 len = strlcat(buf, "\r\n", sizeof buf);
2334 if (write(Sock, buf, len) < 0) {
2335 /* Because this function most probably got called to log
2336 * an error message, any write error is ignored here to
2337 * avoid an endless loop. But casting the result of write()
2338 * to "void" doesn't satisfy the GNU C code attribute
2339 * "warn_unused_result" which is used by some versions of
2340 * glibc (e.g. 2.11.1), therefore this silly error
2341 * "handling" code here :-( */
2344 } /* Simple_Error */
2347 * Get CLIENT structure that belongs to a local connection identified by its
2348 * index number. Each connection belongs to a client by definition, so it is
2349 * not required that the caller checks for NULL return values.
2351 * @param Idx Connection index number.
2352 * @returns Pointer to CLIENT structure.
2355 Conn_GetClient( CONN_ID Idx )
2360 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2362 return c ? c->client : NULL;
2366 * Get PROC_STAT sub-process structure of a connection.
2368 * @param Idx Connection index number.
2369 * @returns PROC_STAT structure.
2372 Conn_GetProcStat(CONN_ID Idx)
2377 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2379 return &c->proc_stat;
2380 } /* Conn_GetProcStat */
2383 * Get CONN_ID from file descriptor associated to a subprocess structure.
2385 * @param fd File descriptor.
2386 * @returns CONN_ID or NONE (-1).
2389 Conn_GetFromProc(int fd)
2394 for (i = 0; i < Pool_Size; i++) {
2395 if ((My_Connections[i].sock != NONE)
2396 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2400 } /* Conn_GetFromProc */
2403 * Throttle a connection because of excessive usage.
2405 * @param Reason The reason, see THROTTLE_xxx constants.
2406 * @param Idx The connection index.
2407 * @param Client The client of this connection.
2408 * @param Value The time to delay this connection.
2411 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2415 assert(Client != NULL);
2417 /* Never throttle servers or services, only interrupt processing */
2418 if (Client_Type(Client) == CLIENT_SERVER
2419 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2420 || Client_Type(Client) == CLIENT_SERVICE)
2423 /* Don't throttle clients with user mode 'F' set */
2424 if (Client_HasMode(Client, 'F'))
2427 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2429 Conn_SetPenalty(Idx, 1);
2435 Conn_GetAuthPing(CONN_ID Idx)
2437 assert (Idx != NONE);
2438 return My_Connections[Idx].auth_ping;
2439 } /* Conn_GetAuthPing */
2442 Conn_SetAuthPing(CONN_ID Idx, long ID)
2444 assert (Idx != NONE);
2445 My_Connections[Idx].auth_ping = ID;
2446 } /* Conn_SetAuthPing */
2448 #endif /* STRICT_RFC */
2453 * IO callback for new SSL-enabled client and server connections.
2455 * @param sock Socket descriptor.
2456 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2459 cb_clientserver_ssl(int sock, UNUSED short what)
2461 CONN_ID idx = Socket2Index(sock);
2468 switch (ConnSSL_Accept(&My_Connections[idx])) {
2472 return; /* EAGAIN: callback will be invoked again by IO layer */
2475 "SSL accept error, closing socket", "SSL accept error",
2480 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2484 * IO callback for listening SSL sockets: handle new connections. This callback
2485 * gets called when a new SSL-enabled connection should be accepted.
2487 * @param sock Socket descriptor.
2488 * @param irrelevant (ignored IO specification)
2491 cb_listen_ssl(int sock, short irrelevant)
2496 fd = New_Connection(sock, true);
2499 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2503 * IO callback for new outgoing SSL-enabled server connections.
2505 * @param sock Socket descriptor.
2506 * @param unused (ignored IO specification)
2509 cb_connserver_login_ssl(int sock, short unused)
2511 CONN_ID idx = Socket2Index(sock);
2520 switch (ConnSSL_Connect( &My_Connections[idx])) {
2522 case 0: LogDebug("ConnSSL_Connect: not ready");
2525 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2526 Conn_Close(idx, "Can't connect", NULL, false);
2530 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2531 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2538 * Check if SSL library needs to read SSL-protocol related data.
2540 * SSL/TLS connections require extra treatment:
2541 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2542 * need to take care of that first, before checking read/write buffers.
2543 * For instance, while we might have data in our write buffer, the
2544 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2545 * writes to succeed.
2547 * If this function returns true, such a condition is met and we have
2548 * to reverse the condition (check for read even if we've data to write,
2549 * do not check for read but writeability even if write-buffer is empty).
2551 * @param c Connection to check.
2552 * @returns true if SSL-library has to read protocol data.
2555 SSL_WantRead(const CONNECTION *c)
2557 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2558 io_event_add(c->sock, IO_WANTREAD);
2565 * Check if SSL library needs to write SSL-protocol related data.
2567 * Please see description of SSL_WantRead() for full description!
2569 * @param c Connection to check.
2570 * @returns true if SSL-library has to write protocol data.
2573 SSL_WantWrite(const CONNECTION *c)
2575 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2576 io_event_add(c->sock, IO_WANTWRITE);
2583 * Get information about used SSL cipher.
2585 * @param Idx Connection index number.
2586 * @param buf Buffer for returned information text.
2587 * @param len Size of return buffer "buf".
2588 * @returns true on success, false otherwise.
2591 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2595 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2596 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2600 * Check if a connection is SSL-enabled or not.
2602 * @param Idx Connection index number.
2603 * @return true if connection is SSL-enabled, false otherwise.
2606 Conn_UsesSSL(CONN_ID Idx)
2610 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2611 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2615 Conn_GetCertFp(CONN_ID Idx)
2619 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2620 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2624 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2628 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2629 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2632 #else /* SSL_SUPPORT */
2635 Conn_UsesSSL(UNUSED CONN_ID Idx)
2641 Conn_GetCertFp(UNUSED CONN_ID Idx)
2647 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2652 #endif /* SSL_SUPPORT */
2657 * Dump internal state of the "connection module".
2660 Conn_DebugDump(void)
2664 Log(LOG_DEBUG, "Connection status:");
2665 for (i = 0; i < Pool_Size; i++) {
2666 if (My_Connections[i].sock == NONE)
2669 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2670 My_Connections[i].sock, My_Connections[i].host,
2671 My_Connections[i].lastdata, My_Connections[i].lastping,
2672 My_Connections[i].delaytime, My_Connections[i].flag,
2673 My_Connections[i].options, My_Connections[i].bps,
2674 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2676 } /* Conn_DumpClients */