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.
13 #define CONN_MODULE_GLOBAL_INIT
19 * Connection management
22 /* Additionan debug messages related to buffer handling: 0=off / 1=on */
23 #define DEBUG_BUFFER 0
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 */
59 # include "conn-encoding.h"
63 #include "conn-func.h"
66 #include "ng_ipaddr.h"
70 #define SERVER_WAIT (NONE - 1) /** "Wait for outgoing connection" flag */
72 #define MAX_COMMANDS 3 /** Max. commands per loop for users */
73 #define MAX_COMMANDS_SERVER_MIN 10 /** Min. commands per loop for servers */
74 #define MAX_COMMANDS_SERVICE 10 /** Max. commands per loop for services */
76 #define SD_LISTEN_FDS_START 3 /** systemd(8) socket activation offset */
78 #define THROTTLE_CMDS 1 /** Throttling: max commands reached */
79 #define THROTTLE_BPS 2 /** Throttling: max bps reached */
81 static bool Handle_Write PARAMS(( CONN_ID Idx ));
82 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
83 static int New_Connection PARAMS(( int Sock, bool IsSSL ));
84 static CONN_ID Socket2Index PARAMS(( int Sock ));
85 static void Read_Request PARAMS(( CONN_ID Idx ));
86 static unsigned int Handle_Buffer PARAMS(( CONN_ID Idx ));
87 static void Check_Connections PARAMS(( void ));
88 static void Check_Servers PARAMS(( void ));
89 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
90 static bool Init_Socket PARAMS(( int Sock ));
91 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
92 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
93 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
94 static void Account_Connection PARAMS((void));
95 static void Throttle_Connection PARAMS((const CONN_ID Idx, CLIENT *Client,
96 const int Reason, unsigned int Value));
98 static array My_Listeners;
99 static array My_ConnArray;
100 static size_t NumConnections, NumConnectionsMax, NumConnectionsAccepted;
103 int allow_severity = LOG_INFO;
104 int deny_severity = LOG_ERR;
107 static void server_login PARAMS((CONN_ID idx));
110 extern struct SSLOptions Conf_SSLOptions;
111 static bool SSL_WantRead PARAMS((const CONNECTION *c));
112 static bool SSL_WantWrite PARAMS((const CONNECTION *c));
113 static void cb_listen_ssl PARAMS((int sock, short irrelevant));
114 static void cb_connserver_login_ssl PARAMS((int sock, short what));
115 static void cb_clientserver_ssl PARAMS((int sock, short what));
117 static void cb_Read_Resolver_Result PARAMS((int sock, UNUSED short what));
118 static void cb_Connect_to_Server PARAMS((int sock, UNUSED short what));
119 static void cb_clientserver PARAMS((int sock, short what));
124 * Get number of sockets available from systemd(8).
126 * ngIRCd needs to implement its own sd_listen_fds(3) function and can't
127 * use the one provided by systemd itself, because the sockets will be
128 * used in a forked child process with a new PID, and this would trigger
129 * an error in the standard implementation.
131 * @return Number of sockets available, -1 if sockets have already been
132 * initialized, or 0 when no sockets have been passed.
135 my_sd_listen_fds(void)
140 /* Check if LISTEN_PID exists; but we ignore the result, because
141 * normally ngircd forks a child before checking this, and therefore
142 * the PID set in the environment is always wrong ... */
143 e = getenv("LISTEN_PID");
147 e = getenv("LISTEN_FDS");
152 unsetenv("LISTEN_FDS");
159 * IO callback for listening sockets: handle new connections. This callback
160 * gets called when a new non-SSL connection should be accepted.
162 * @param sock Socket descriptor.
163 * @param irrelevant (ignored IO specification)
166 cb_listen(int sock, short irrelevant)
169 (void) New_Connection(sock, false);
173 * IO callback for new outgoing non-SSL server connections.
175 * @param sock Socket descriptor.
176 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
179 cb_connserver(int sock, UNUSED short what)
181 int res, err, server;
183 CONN_ID idx = Socket2Index( sock );
190 assert(what & IO_WANTWRITE);
192 /* Make sure that the server is still configured; it could have been
193 * removed in the meantime! */
194 server = Conf_GetServer(idx);
196 Log(LOG_ERR, "Connection on socket %d to \"%s\" aborted!",
197 sock, My_Connections[idx].host);
198 Conn_Close(idx, "Connection aborted", NULL, false);
202 /* connect() finished, get result. */
203 sock_len = (socklen_t)sizeof(err);
204 res = getsockopt(My_Connections[idx].sock, SOL_SOCKET, SO_ERROR,
206 assert(sock_len == sizeof(err));
208 /* Error while connecting? */
209 if ((res != 0) || (err != 0)) {
211 Log(LOG_CRIT, "getsockopt (connection %d): %s!",
212 idx, strerror(errno));
215 "Can't connect socket to \"%s:%d\" (connection %d): %s!",
216 My_Connections[idx].host, Conf_Server[server].port,
219 Conn_Close(idx, "Can't connect", NULL, false);
221 if (ng_ipaddr_af(&Conf_Server[server].dst_addr[0])) {
222 /* more addresses to try... */
223 New_Server(server, &Conf_Server[server].dst_addr[0]);
224 /* connection to dst_addr[0] is now in progress, so
225 * remove this address... */
226 Conf_Server[server].dst_addr[0] =
227 Conf_Server[server].dst_addr[1];
228 memset(&Conf_Server[server].dst_addr[1], 0,
229 sizeof(Conf_Server[server].dst_addr[1]));
234 /* connect() succeeded, remove all additional addresses */
235 memset(&Conf_Server[server].dst_addr, 0,
236 sizeof(Conf_Server[server].dst_addr));
238 Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
240 if ( Conn_OPTION_ISSET( &My_Connections[idx], CONN_SSL_CONNECT )) {
241 io_event_setcb( sock, cb_connserver_login_ssl );
242 io_event_add( sock, IO_WANTWRITE|IO_WANTREAD );
250 * Login to a remote server.
252 * @param idx Connection index.
255 server_login(CONN_ID idx)
258 "Connection %d (socket %d) with \"%s:%d\" established. Now logging in ...",
259 idx, My_Connections[idx].sock, My_Connections[idx].host,
260 Conf_Server[Conf_GetServer(idx)].port);
262 io_event_setcb( My_Connections[idx].sock, cb_clientserver);
263 io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
265 /* Send PASS and SERVER command to peer */
266 Conn_WriteStr(idx, "PASS %s %s",
267 Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID);
268 Conn_WriteStr(idx, "SERVER %s :%s",
269 Conf_ServerName, Conf_ServerInfo);
273 * IO callback for established non-SSL client and server connections.
275 * @param sock Socket descriptor.
276 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
279 cb_clientserver(int sock, short what)
281 CONN_ID idx = Socket2Index(sock);
289 if (what & IO_WANTREAD
290 || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE))) {
291 /* if TLS layer needs to write additional data, call
292 * Read_Request() instead so that SSL/TLS can continue */
296 if (what & IO_WANTREAD)
299 if (what & IO_WANTWRITE)
304 * Initialize connection module.
311 /* Initialize the "connection pool".
312 * FIXME: My_Connetions/Pool_Size is needed by other parts of the
313 * code; remove them! */
315 size = Conf_MaxConnections > 0 ? Conf_MaxConnections : CONNECTION_POOL;
316 if (Socket2Index(size) <= NONE) {
317 Log(LOG_EMERG, "Failed to initialize connection pool!");
321 /* Initialize "listener" array. */
322 array_free( &My_Listeners );
326 * Clean up connection module.
333 Conn_ExitListeners();
335 LogDebug("Shutting down all connections ..." );
336 for( idx = 0; idx < Pool_Size; idx++ ) {
337 if( My_Connections[idx].sock > NONE ) {
338 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
339 "Server going down (restarting)":"Server going down", true );
343 array_free(&My_ConnArray);
344 My_Connections = NULL;
346 io_library_shutdown();
350 * Close all sockets (file descriptors) of open connections.
351 * This is useful in forked child processes, for example, to make sure that
352 * they don't hold connections open that the main process wants to close.
355 Conn_CloseAllSockets(int ExceptOf)
359 for(idx = 0; idx < Pool_Size; idx++) {
360 if(My_Connections[idx].sock > NONE &&
361 My_Connections[idx].sock != ExceptOf)
362 close(My_Connections[idx].sock);
367 * Initialize listening ports.
369 * @param a Array containing the ports the daemon should listen on.
370 * @param listen_addr Address the socket should listen on (can be "0.0.0.0").
371 * @param func IO callback function to register.
372 * @returns Number of listening sockets created.
375 Init_Listeners(array *a, const char *listen_addr, void (*func)(int,short))
377 unsigned int created = 0;
382 len = array_length(a, sizeof (UINT16));
383 port = array_start(a);
385 fd = NewListener(listen_addr, *port);
390 if (!io_event_create( fd, IO_WANTREAD, func )) {
392 "io_event_create(): Can't add fd %d (port %u): %s!",
393 fd, (unsigned int) *port, strerror(errno));
405 * Initialize all listening sockets.
407 * @returns Number of created listening sockets
410 Conn_InitListeners( void )
412 /* Initialize ports on which the server should accept connections */
413 unsigned int created = 0;
414 char *af_str, *copy, *listen_addr;
415 int count, fd, i, addr_len;
418 assert(Conf_ListenAddress);
420 count = my_sd_listen_fds();
423 "Not re-initializing listening sockets of systemd(8) ...");
427 /* systemd(8) passed sockets to us, so don't try to initialize
428 * listening sockets on our own but use the passed ones */
429 LogDebug("Initializing %d systemd sockets ...", count);
430 for (i = 0; i < count; i++) {
431 fd = SD_LISTEN_FDS_START + i;
432 addr_len = (int)sizeof(addr);
433 getsockname(fd, (struct sockaddr *)&addr,
434 (socklen_t*)&addr_len);
436 if (addr.sin4.sin_family != AF_INET
437 && addr.sin4.sin_family != AF_INET6)
439 if (addr.sin4.sin_family != AF_INET)
442 /* Socket is of unsupported type! For example,
443 * systemd passed in an IPv6 socket but ngIRCd
444 * isn't compiled with IPv6 support. */
445 switch (addr.sin4.sin_family)
447 case AF_UNSPEC: af_str = "AF_UNSPEC"; break;
448 case AF_UNIX: af_str = "AF_UNIX"; break;
449 case AF_INET: af_str = "AF_INET"; break;
451 case AF_INET6: af_str = "AF_INET6"; break;
454 case AF_NETLINK: af_str = "AF_NETLINK"; break;
456 default: af_str = "unknown"; break;
459 "Socket %d is of unsupported type \"%s\" (%d), have to ignore it!",
460 fd, af_str, addr.sin4.sin_family);
466 if (!io_event_create(fd, IO_WANTREAD, cb_listen)) {
468 "io_event_create(): Can't add fd %d: %s!",
469 fd, strerror(errno));
473 "Initialized socket %d from systemd(8): %s:%d.", fd,
474 ng_ipaddr_tostr(&addr), ng_ipaddr_getport(&addr));
480 /* not using systemd socket activation, initialize listening sockets: */
482 /* can't use Conf_ListenAddress directly, see below */
483 copy = strdup(Conf_ListenAddress);
485 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress,
489 listen_addr = strtok(copy, ",");
491 while (listen_addr) {
492 ngt_TrimStr(listen_addr);
494 created += Init_Listeners(&Conf_ListenPorts,
495 listen_addr, cb_listen);
497 created += Init_Listeners(&Conf_SSLOptions.ListenPorts,
498 listen_addr, cb_listen_ssl);
502 listen_addr = strtok(NULL, ",");
505 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
506 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
507 * Instead, free() takes place in conf.c, before the config file
508 * is being parsed. */
512 } /* Conn_InitListeners */
515 * Shut down all listening sockets.
518 Conn_ExitListeners( void )
520 /* Close down all listening sockets */
524 /* Get number of listening sockets to shut down. There can be none
525 * if ngIRCd has been "socket activated" by systemd. */
526 arraylen = array_length(&My_Listeners, sizeof (int));
531 "Shutting down all listening sockets (%d total) ...", arraylen);
532 fd = array_start(&My_Listeners);
537 LogDebug("Listening socket %d closed.", *fd );
540 array_free(&My_Listeners);
541 } /* Conn_ExitListeners */
544 * Bind a socket to a specific (source) address.
546 * @param addr Address structure.
547 * @param listen_addrstr Source address as string.
548 * @param Port Port number.
549 * @returns true on success, false otherwise.
552 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
556 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
558 assert(listen_addrstr);
560 "Can't listen on [%s]:%u: Failed to parse IP address!",
561 listen_addrstr, Port);
567 * Set a socket to "IPv6 only". If the given socket doesn't belong to the
568 * AF_INET6 family, or the operating system doesn't support this functionality,
569 * this function retruns silently.
571 * @param af Address family of the socket.
572 * @param sock Socket handle.
575 set_v6_only(int af, int sock)
577 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
583 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
584 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
592 * Initialize new listening port.
594 * @param listen_addr Local address to bind the socet to (can be 0.0.0.0).
595 * @param Port Port number on which the new socket should be listening.
596 * @returns file descriptor of the socket or -1 on failure.
599 NewListener(const char *listen_addr, UINT16 Port)
601 /* Create new listening socket on specified port */
605 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
608 af = ng_ipaddr_af(&addr);
609 sock = socket(af, SOCK_STREAM, 0);
611 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af,
616 set_v6_only(af, sock);
618 if (!Init_Socket(sock))
621 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
622 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s!",
623 ng_ipaddr_tostr(&addr), Port, strerror(errno));
628 if (listen(sock, 10) != 0) {
629 Log(LOG_CRIT, "Can't listen on socket: %s!", strerror(errno));
634 /* keep fd in list so we can close it when ngircd restarts/shuts down */
635 if (!array_catb(&My_Listeners, (char *)&sock, sizeof(int))) {
636 Log(LOG_CRIT, "Can't add socket to My_Listeners array: %s!",
642 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
643 ng_ipaddr_tostr(&addr), Port, sock);
648 * "Main Loop": Loop until shutdown or restart is signalled.
650 * This function loops until a shutdown or restart of ngIRCd is signalled and
651 * calls io_dispatch() to check for readable and writable sockets every second.
652 * It checks for status changes on pending connections (e. g. when a hostname
653 * has been resolved), checks for "penalties" and timeouts, and handles the
664 Log(LOG_NOTICE, "Server \"%s\" (on \"%s\") ready.",
665 Client_ID(Client_ThisServer()), Client_Hostname(Client_ThisServer()));
667 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
670 /* Check configured servers and established links */
674 /* Expire outdated class/list items */
677 /* Look for non-empty read buffers ... */
678 for (i = 0; i < Pool_Size; i++) {
679 if ((My_Connections[i].sock > NONE)
680 && (array_bytes(&My_Connections[i].rbuf) > 0)) {
681 /* ... and try to handle the received data */
686 /* Look for non-empty write buffers ... */
687 for (i = 0; i < Pool_Size; i++) {
688 if (My_Connections[i].sock <= NONE)
691 wdatalen = array_bytes(&My_Connections[i].wbuf);
694 array_bytes(&My_Connections[i].zip.wbuf) > 0)
700 if (SSL_WantRead(&My_Connections[i]))
703 io_event_add(My_Connections[i].sock,
708 /* Check from which sockets we possibly could read ... */
709 for (i = 0; i < Pool_Size; i++) {
710 if (My_Connections[i].sock <= NONE)
713 if (SSL_WantWrite(&My_Connections[i]))
714 /* TLS/SSL layer needs to write data; deal
715 * with this first! */
718 if (Proc_InProgress(&My_Connections[i].proc_stat)) {
719 /* Wait for completion of forked subprocess
720 * and ignore the socket in the meantime ... */
721 io_event_del(My_Connections[i].sock,
726 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
727 /* Wait for completion of connect() ... */
730 if (My_Connections[i].delaytime > t) {
731 /* There is a "penalty time" set: ignore socket! */
732 io_event_del(My_Connections[i].sock,
737 io_event_add(My_Connections[i].sock, IO_WANTREAD);
740 /* Set the timeout for reading from the network to 1 second,
741 * which is the granularity with witch we handle "penalty
742 * times" for example.
743 * Note: tv_sec/usec are undefined(!) after io_dispatch()
744 * returns, so we have to set it before each call to it! */
748 /* Wait for activity ... */
749 i = io_dispatch(&tv);
750 if (i == -1 && errno != EINTR) {
751 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
753 Log(LOG_ALERT, "%s exiting due to fatal errors!",
758 /* Should ngIRCd timeout when idle? */
759 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
760 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
761 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
763 Conf_IdleTimeout == 1 ? "" : "s");
764 NGIRCd_SignalQuit = true;
768 if (NGIRCd_SignalQuit)
769 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
770 else if (NGIRCd_SignalRestart)
771 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
775 * Write a text string into the socket of a connection.
777 * This function automatically appends CR+LF to the string and validates that
778 * the result is a valid IRC message (oversized messages are shortened, for
779 * example). Then it calls the Conn_Write() function to do the actual sending.
781 * @param Idx Index fo the connection.
782 * @param Format Format string, see printf().
783 * @returns true on success, false otherwise.
787 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
790 Conn_WriteStr(Idx, Format, va_alist)
796 char buffer[COMMAND_LEN];
805 assert( Idx > NONE );
806 assert( Format != NULL );
809 va_start( ap, Format );
813 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
814 if (r >= COMMAND_LEN - 2 || r == -1) {
816 * The string that should be written to the socket is longer
817 * than the allowed size of COMMAND_LEN bytes (including both
818 * the CR and LF characters). This can be caused by the
819 * IRC_WriteXXX() functions when the prefix of this server had
820 * to be added to an already "quite long" command line which
821 * has been received from a regular IRC client, for example.
823 * We are not allowed to send such "oversized" messages to
824 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
825 * ("these messages SHALL NOT exceed 512 characters in length,
826 * counting all characters including the trailing CR-LF").
828 * So we have a big problem here: we should send more bytes
829 * to the network than we are allowed to and we don't know
830 * the originator (any more). The "old" behavior of blaming
831 * the receiver ("next hop") is a bad idea (it could be just
832 * an other server only routing the message!), so the only
833 * option left is to shorten the string and to hope that the
834 * result is still somewhat useful ...
837 * C99 states that vsnprintf() "returns the number of characters
838 * that would have been printed if the n were unlimited"; but
839 * according to the Linux manual page "glibc until 2.0.6 would
840 * return -1 when the output was truncated" -- so we have to
841 * handle both cases ...
845 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
850 ptr = strchr(buffer + 1, ':');
853 message = Conn_EncodingTo(Idx, ptr);
855 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
861 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
864 len = strlcat( buffer, "\r\n", sizeof( buffer ));
865 ok = Conn_Write(Idx, buffer, len);
866 My_Connections[Idx].msg_out++;
870 } /* Conn_WriteStr */
873 Conn_Password( CONN_ID Idx )
875 assert( Idx > NONE );
876 if (My_Connections[Idx].pwd == NULL)
879 return My_Connections[Idx].pwd;
880 } /* Conn_Password */
883 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
885 assert( Idx > NONE );
887 if (My_Connections[Idx].pwd)
888 free(My_Connections[Idx].pwd);
890 My_Connections[Idx].pwd = strdup(Pwd);
891 if (My_Connections[Idx].pwd == NULL) {
892 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
895 } /* Conn_SetPassword */
898 * Append Data to the outbound write buffer of a connection.
900 * @param Idx Index of the connection.
901 * @param Data pointer to the data.
902 * @param Len length of Data.
903 * @returns true on success, false otherwise.
906 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
909 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
910 assert( Idx > NONE );
911 assert( Data != NULL );
914 /* Is the socket still open? A previous call to Conn_Write()
915 * may have closed the connection due to a fatal error.
916 * In this case it is sufficient to return an error, as well. */
917 if (My_Connections[Idx].sock <= NONE) {
918 LogDebug("Skipped write on closed socket (connection %d).", Idx);
922 /* Make sure that there still exists a CLIENT structure associated
923 * with this connection and check if this is a server or not: */
924 c = Conn_GetClient(Idx);
926 /* Servers do get special write buffer limits, so they can
927 * generate all the messages that are required while peering. */
928 if (Client_Type(c) == CLIENT_SERVER)
929 writebuf_limit = WRITEBUFFER_SLINK_LEN;
931 LogDebug("Write on socket without client (connection %d)!?", Idx);
934 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
936 * Zip_Buffer() does all the dirty work for us: it flushes
937 * the (pre-)compression buffers if required and handles
938 * all error conditions. */
939 if (!Zip_Buffer(Idx, Data, Len))
945 /* Uncompressed link:
946 * Check if outbound buffer has enough space for the data. */
947 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
948 WRITEBUFFER_FLUSH_LEN) {
949 /* Buffer is full, flush it. Handle_Write deals with
950 * low-level errors, if any. */
951 if (!Handle_Write(Idx))
955 /* When the write buffer is still too big after flushing it,
956 * the connection will be killed. */
957 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
960 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
961 Idx, writebuf_limit, Len,
962 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
963 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
967 /* Copy data to write buffer */
968 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
971 My_Connections[Idx].bytes_out += Len;
974 /* Adjust global write counter */
981 * Shut down a connection.
983 * @param Idx Connection index.
984 * @param LogMsg Message to write to the log or NULL. If no LogMsg
985 * is given, the FwdMsg is logged.
986 * @param FwdMsg Message to forward to remote servers.
987 * @param InformClient If true, inform the client on the connection which is
988 * to be shut down of the reason (FwdMsg) and send
989 * connection statistics before disconnecting it.
992 Conn_Close(CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient)
994 /* Close connection. Open pipes of asynchronous resolver
995 * sub-processes are closed down. */
1001 double in_z_k, out_z_k;
1005 assert( Idx > NONE );
1007 /* Is this link already shutting down? */
1008 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1009 /* Conn_Close() has been called recursively for this link;
1010 * probable reason: Handle_Write() failed -- see below. */
1011 LogDebug("Recursive request to close connection %d!", Idx );
1015 assert( My_Connections[Idx].sock > NONE );
1017 /* Mark link as "closing" */
1018 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1020 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1021 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1022 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1024 /* Search client, if any */
1025 c = Conn_GetClient( Idx );
1027 /* Should the client be informed? */
1030 /* Send statistics to client if registered as user: */
1031 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1033 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1034 Client_ID(Client_ThisServer()), Client_ID(c),
1036 (double)My_Connections[Idx].bytes_in / 1024,
1037 (double)My_Connections[Idx].bytes_out / 1024);
1040 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1042 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
1044 Conn_WriteStr(Idx, "ERROR :Closing connection");
1047 /* Try to write out the write buffer. Note: Handle_Write() eventually
1048 * removes the CLIENT structure associated with this connection if an
1049 * error occurs! So we have to re-check if there is still an valid
1050 * CLIENT structure after calling Handle_Write() ...*/
1051 (void)Handle_Write( Idx );
1053 /* Search client, if any (re-check!) */
1054 c = Conn_GetClient( Idx );
1056 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1057 LogDebug("SSL connection %d shutting down ...", Idx);
1058 ConnSSL_Free(&My_Connections[Idx]);
1061 /* Shut down socket */
1062 if (! io_close(My_Connections[Idx].sock)) {
1063 /* Oops, we can't close the socket!? This is ... ugly! */
1065 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1066 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1067 port, strerror(errno));
1070 /* Mark socket as invalid: */
1071 My_Connections[Idx].sock = NONE;
1073 /* If there is still a client, unregister it now */
1075 Client_Destroy(c, LogMsg, FwdMsg, true);
1077 /* Calculate statistics and log information */
1078 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1079 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1081 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1082 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1083 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1084 /* Make sure that no division by zero can occur during
1085 * the calculation of in_p and out_p: in_z_k and out_z_k
1086 * are non-zero, that's guaranteed by the protocol until
1087 * compression can be enabled. */
1092 in_p = (int)(( in_k * 100 ) / in_z_k );
1093 out_p = (int)(( out_k * 100 ) / out_z_k );
1095 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1096 Idx, My_Connections[Idx].host, port,
1097 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1103 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1104 Idx, My_Connections[Idx].host, port,
1108 /* Servers: Modify time of next connect attempt? */
1109 Conf_UnsetServer( Idx );
1112 /* Clean up zlib, if link was compressed */
1113 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1114 inflateEnd( &My_Connections[Idx].zip.in );
1115 deflateEnd( &My_Connections[Idx].zip.out );
1116 array_free(&My_Connections[Idx].zip.rbuf);
1117 array_free(&My_Connections[Idx].zip.wbuf);
1121 array_free(&My_Connections[Idx].rbuf);
1122 array_free(&My_Connections[Idx].wbuf);
1123 if (My_Connections[Idx].pwd != NULL)
1124 free(My_Connections[Idx].pwd);
1126 /* Clean up connection structure (=free it) */
1127 Init_Conn_Struct( Idx );
1129 assert(NumConnections > 0);
1132 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1133 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1135 idle_t = NumConnections > 0 ? 0 : time(NULL);
1139 * Get current number of connections.
1141 * @returns Number of current connections.
1146 return NumConnections;
1150 * Get number of maximum simultaneous connections.
1152 * @returns Number of maximum simultaneous connections.
1157 return NumConnectionsMax;
1158 } /* Conn_CountMax */
1161 * Get number of connections accepted since the daemon startet.
1163 * @returns Number of connections accepted.
1166 Conn_CountAccepted(void)
1168 return NumConnectionsAccepted;
1169 } /* Conn_CountAccepted */
1172 * Synchronize established connections and configured server structures
1173 * after a configuration update and store the correct connection IDs, if any.
1176 Conn_SyncServerStruct(void)
1182 for (i = 0; i < Pool_Size; i++) {
1183 if (My_Connections[i].sock == NONE)
1187 client = Conn_GetClient(i);
1188 if (!client || Client_Type(client) != CLIENT_SERVER)
1191 for (c = 0; c < MAX_SERVERS; c++) {
1192 /* Configured server? */
1193 if (!Conf_Server[c].host[0])
1196 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1197 Conf_Server[c].conn_id = i;
1200 } /* SyncServerStruct */
1203 * Get IP address string of a connection.
1205 * @param Idx Connection index.
1206 * @return Pointer to a global buffer containing the IP address as string.
1209 Conn_GetIPAInfo(CONN_ID Idx)
1212 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1216 * Send out data of write buffer; connect new sockets.
1218 * @param Idx Connection index.
1219 * @returns true on success, false otherwise.
1222 Handle_Write( CONN_ID Idx )
1227 assert( Idx > NONE );
1228 if ( My_Connections[Idx].sock < 0 ) {
1229 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1232 assert( My_Connections[Idx].sock > NONE );
1234 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1237 if (wdatalen == 0) {
1238 /* Write buffer is empty, so we try to flush the compression
1239 * buffer and get some data to work with from there :-) */
1240 if (!Zip_Flush(Idx))
1243 /* Now the write buffer most probably has changed: */
1244 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1248 if (wdatalen == 0) {
1249 /* Still no data, fine. */
1250 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1256 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1261 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1262 len = ConnSSL_Write(&My_Connections[Idx],
1263 array_start(&My_Connections[Idx].wbuf),
1268 len = write(My_Connections[Idx].sock,
1269 array_start(&My_Connections[Idx].wbuf), wdatalen );
1272 if (errno == EAGAIN || errno == EINTR)
1275 /* Log write errors but do not close the connection yet.
1276 * Calling Conn_Close() now could result in too many recursive calls.
1278 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1280 "Write error on connection %d (socket %d): %s!",
1281 Idx, My_Connections[Idx].sock, strerror(errno));
1283 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1284 Idx, My_Connections[Idx].sock, strerror(errno));
1289 /* move any data not yet written to beginning */
1290 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1293 } /* Handle_Write */
1296 * Count established connections to a specific IP address.
1298 * @returns Number of established connections.
1301 Count_Connections(ng_ipaddr_t *a)
1306 for (i = 0; i < Pool_Size; i++) {
1307 if (My_Connections[i].sock <= NONE)
1309 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1313 } /* Count_Connections */
1316 * Initialize new client connection on a listening socket.
1318 * @param Sock Listening socket descriptor.
1319 * @param IsSSL true if this socket expects SSL-encrypted data.
1320 * @returns Accepted socket descriptor or -1 on error.
1323 New_Connection(int Sock, UNUSED bool IsSSL)
1326 struct request_info req;
1328 ng_ipaddr_t new_addr;
1329 char ip_str[NG_INET_ADDRSTRLEN];
1330 int new_sock, new_sock_len;
1334 assert(Sock > NONE);
1336 LogDebug("Accepting new connection on socket %d ...", Sock);
1338 new_sock_len = (int)sizeof(new_addr);
1339 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1340 (socklen_t *)&new_sock_len);
1342 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1345 NumConnectionsAccepted++;
1347 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1348 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1349 Simple_Message(new_sock, "ERROR :Internal Server Error");
1355 /* Validate socket using TCP Wrappers */
1356 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1357 RQ_CLIENT_SIN, &new_addr, NULL);
1359 if (!hosts_access(&req)) {
1361 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1362 Simple_Message(new_sock, "ERROR :Connection refused");
1368 if (!Init_Socket(new_sock))
1371 /* Check global connection limit */
1372 if ((Conf_MaxConnections > 0) &&
1373 (NumConnections >= (size_t) Conf_MaxConnections)) {
1374 Log(LOG_ALERT, "Can't accept new connection on socket %d: Limit (%d) reached!",
1375 Sock, Conf_MaxConnections);
1376 Simple_Message(new_sock, "ERROR :Connection limit reached");
1381 /* Check IP-based connection limit */
1382 cnt = Count_Connections(&new_addr);
1383 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1384 /* Access denied, too many connections from this IP address! */
1386 "Refused connection from %s: too may connections (%ld) from this IP address!",
1388 Simple_Message(new_sock,
1389 "ERROR :Connection refused, too many connections from your IP address");
1394 if (Socket2Index(new_sock) <= NONE) {
1395 Simple_Message(new_sock, "ERROR: Internal error");
1400 /* register callback */
1401 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1403 "Can't accept connection: io_event_create failed!");
1404 Simple_Message(new_sock, "ERROR :Internal error");
1409 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1412 "Can't accept connection: can't create client structure!");
1413 Simple_Message(new_sock, "ERROR :Internal error");
1418 Init_Conn_Struct(new_sock);
1419 My_Connections[new_sock].sock = new_sock;
1420 My_Connections[new_sock].addr = new_addr;
1421 My_Connections[new_sock].client = c;
1423 /* Set initial hostname to IP address. This becomes overwritten when
1424 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1425 if (ng_ipaddr_af(&new_addr) != AF_INET)
1426 snprintf(My_Connections[new_sock].host,
1427 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1429 strlcpy(My_Connections[new_sock].host, ip_str,
1430 sizeof(My_Connections[new_sock].host));
1432 Client_SetHostname(c, My_Connections[new_sock].host);
1434 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1435 new_sock, My_Connections[new_sock].host,
1436 ng_ipaddr_getport(&new_addr), Sock);
1437 Account_Connection();
1440 /* Delay connection initalization until SSL handshake is finished */
1443 Conn_StartLogin(new_sock);
1446 } /* New_Connection */
1449 * Finish connection initialization, start resolver subprocess.
1451 * @param Idx Connection index.
1454 Conn_StartLogin(CONN_ID Idx)
1456 int ident_sock = -1;
1460 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1465 /* Should we make an IDENT request? */
1467 ident_sock = My_Connections[Idx].sock;
1470 if (Conf_NoticeBeforeRegistration) {
1471 /* Send "NOTICE *" messages to the client */
1474 (void)Conn_WriteStr(Idx,
1475 "NOTICE * :*** Looking up your hostname and checking ident");
1478 (void)Conn_WriteStr(Idx,
1479 "NOTICE * :*** Looking up your hostname");
1480 /* Send buffered data to the client, but break on errors
1481 * because Handle_Write() would have closed the connection
1482 * again in this case! */
1483 if (!Handle_Write(Idx))
1487 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1488 ident_sock, cb_Read_Resolver_Result);
1492 * Update global connection counters.
1495 Account_Connection(void)
1499 if (NumConnections > NumConnectionsMax)
1500 NumConnectionsMax = NumConnections;
1501 LogDebug("Total number of connections now %lu (max %lu).",
1502 NumConnections, NumConnectionsMax);
1503 } /* Account_Connection */
1506 * Translate socket handle into connection index (for historical reasons, it is
1507 * a 1:1 mapping today) and enlarge the "connection pool" accordingly.
1509 * @param Sock Socket handle.
1510 * @returns Connecion index or NONE when the pool is too small.
1513 Socket2Index( int Sock )
1516 assert(Pool_Size >= 0);
1518 if (Sock < Pool_Size)
1521 /* Try to allocate more memory ... */
1522 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Sock)) {
1524 "Can't allocate memory to enlarge connection pool!");
1527 LogDebug("Enlarged connection pool for %ld sockets (%ld items, %ld bytes)",
1528 Sock, array_length(&My_ConnArray, sizeof(CONNECTION)),
1529 array_bytes(&My_ConnArray));
1531 /* Adjust pointer to new block, update size and initialize new items. */
1532 My_Connections = array_start(&My_ConnArray);
1533 while (Pool_Size <= Sock)
1534 Init_Conn_Struct(Pool_Size++);
1540 * Read data from the network to the read buffer. If an error occurs,
1541 * the socket of this connection will be shut down.
1543 * @param Idx Connection index.
1546 Read_Request( CONN_ID Idx )
1549 static const unsigned int maxbps = COMMAND_LEN / 2;
1550 char readbuf[READBUFFER_LEN];
1553 assert( Idx > NONE );
1554 assert( My_Connections[Idx].sock > NONE );
1557 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1558 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1560 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1563 /* Read buffer is full */
1565 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1566 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1567 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1572 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1573 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1576 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1578 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1579 My_Connections[Idx].host,
1580 ng_ipaddr_getport(&My_Connections[Idx].addr), Idx);
1581 Conn_Close(Idx, NULL, "Client closed connection", false);
1586 if( errno == EAGAIN ) return;
1587 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1588 Idx, My_Connections[Idx].sock, strerror(errno));
1589 Conn_Close(Idx, "Read error", "Client closed connection",
1594 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1595 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1598 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1600 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1607 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1609 "Could not append received data to input buffer (connection %d): %d bytes!",
1611 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1616 /* Update connection statistics */
1617 My_Connections[Idx].bytes_in += len;
1619 /* Handle read buffer */
1620 My_Connections[Idx].bps += Handle_Buffer(Idx);
1622 /* Make sure that there is still a valid client registered */
1623 c = Conn_GetClient(Idx);
1627 /* Update timestamp of last data received if this connection is
1628 * registered as a user, server or service connection. Don't update
1629 * otherwise, so users have at least Conf_PongTimeout seconds time to
1630 * register with the IRC server -- see Check_Connections().
1631 * Update "lastping", too, if time shifted backwards ... */
1632 if (Client_Type(c) == CLIENT_USER
1633 || Client_Type(c) == CLIENT_SERVER
1634 || Client_Type(c) == CLIENT_SERVICE) {
1636 if (My_Connections[Idx].lastdata != t)
1637 My_Connections[Idx].bps = 0;
1639 My_Connections[Idx].lastdata = t;
1640 if (My_Connections[Idx].lastping > t)
1641 My_Connections[Idx].lastping = t;
1644 /* Look at the data in the (read-) buffer of this connection */
1645 if (My_Connections[Idx].bps >= maxbps)
1646 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1647 } /* Read_Request */
1650 * Handle all data in the connection read-buffer.
1652 * Data is processed until no complete command is left in the read buffer,
1653 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1654 * When a fatal error occurs, the connection is shut down.
1656 * @param Idx Index of the connection.
1657 * @returns Number of bytes processed.
1660 Handle_Buffer(CONN_ID Idx)
1663 char *ptr1, *ptr2, *first_eol;
1671 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1674 c = Conn_GetClient(Idx);
1675 starttime = time(NULL);
1679 /* Servers get special command limits that depend on the user count */
1680 switch (Client_Type(c)) {
1682 maxcmd = (int)(Client_UserCount() / 5)
1683 + MAX_COMMANDS_SERVER_MIN;
1684 /* Allow servers to handle even more commands while peering
1685 * to speed up server login and network synchronization. */
1686 if (Conn_LastPing(Idx) == 0)
1689 case CLIENT_SERVICE:
1690 maxcmd = MAX_COMMANDS_SERVICE;
1693 if (Client_HasMode(c, 'F'))
1694 maxcmd = MAX_COMMANDS_SERVICE;
1698 for (i=0; i < maxcmd; i++) {
1700 if (My_Connections[Idx].delaytime > starttime)
1703 /* Unpack compressed data, if compression is in use */
1704 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1705 /* When unzipping fails, Unzip_Buffer() shuts
1706 * down the connection itself */
1707 if (!Unzip_Buffer(Idx))
1712 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1715 /* Make sure that the buffer is NULL terminated */
1716 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1717 Conn_Close(Idx, NULL,
1718 "Can't allocate memory [Handle_Buffer]",
1723 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1724 * "IRC messages are always lines of characters terminated
1725 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1727 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1730 /* Check for non-RFC-compliant request (only CR or LF)?
1731 * Unfortunately, there are quite a few clients out there
1732 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1733 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1734 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1736 /* Check if there is a single CR or LF _before_ the
1737 * correct CR+LF line terminator: */
1738 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1739 if (first_eol < ptr) {
1740 /* Single CR or LF before CR+LF found */
1744 } else if (ptr1 || ptr2) {
1745 /* No CR+LF terminated command found, but single
1746 * CR or LF found ... */
1748 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1750 ptr = ptr1 ? ptr1 : ptr2;
1758 /* Complete (=line terminated) request found, handle it! */
1761 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1763 if (len > (COMMAND_LEN - 1)) {
1764 /* Request must not exceed 512 chars (incl. CR+LF!),
1765 * see RFC 2812. Disconnect Client if this happens. */
1767 "Request too long (connection %d): %d bytes (max. %d expected)!",
1768 Idx, array_bytes(&My_Connections[Idx].rbuf),
1770 Conn_Close(Idx, NULL, "Request too long", true);
1774 len_processed += (unsigned int)len;
1776 /* Request is empty (only '\r\n', '\r' or '\n');
1777 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1778 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1782 /* remember if stream is already compressed */
1783 old_z = My_Connections[Idx].options & CONN_ZIP;
1786 My_Connections[Idx].msg_in++;
1788 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1789 return 0; /* error -> connection has been closed */
1791 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1793 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1794 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1795 /* The last command activated socket compression.
1796 * Data that was read after that needs to be copied
1797 * to the unzip buffer for decompression: */
1799 (&My_Connections[Idx].zip.rbuf,
1800 &My_Connections[Idx].rbuf)) {
1801 Conn_Close(Idx, NULL,
1802 "Can't allocate memory [Handle_Buffer]",
1807 array_trunc(&My_Connections[Idx].rbuf);
1809 ("Moved already received data (%u bytes) to uncompression buffer.",
1810 array_bytes(&My_Connections[Idx].zip.rbuf));
1815 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1816 Idx, i, maxcmd, len_processed,
1817 array_bytes(&My_Connections[Idx].rbuf));
1820 /* If data has been processed but there is still data in the read
1821 * buffer, the command limit triggered. Enforce the penalty time: */
1822 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1823 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1825 return len_processed;
1826 } /* Handle_Buffer */
1829 * Check whether established connections are still alive or not.
1830 * If not, play PING-PONG first; and if that doesn't help either,
1831 * disconnect the respective peer.
1834 Check_Connections(void)
1840 for (i = 0; i < Pool_Size; i++) {
1841 if (My_Connections[i].sock < 0)
1844 c = Conn_GetClient(i);
1845 if (c && ((Client_Type(c) == CLIENT_USER)
1846 || (Client_Type(c) == CLIENT_SERVER)
1847 || (Client_Type(c) == CLIENT_SERVICE))) {
1848 /* connected User, Server or Service */
1849 if (My_Connections[i].lastping >
1850 My_Connections[i].lastdata) {
1851 /* We already sent a ping */
1852 if (My_Connections[i].lastping <
1853 time(NULL) - Conf_PongTimeout) {
1855 snprintf(msg, sizeof(msg),
1856 "Ping timeout: %d seconds",
1858 LogDebug("Connection %d: %s.", i, msg);
1859 Conn_Close(i, NULL, msg, true);
1861 } else if (My_Connections[i].lastdata <
1862 time(NULL) - Conf_PingTimeout) {
1863 /* We need to send a PING ... */
1864 LogDebug("Connection %d: sending PING ...", i);
1866 Conn_WriteStr(i, "PING :%s",
1867 Client_ID(Client_ThisServer()));
1870 /* The connection is not fully established yet, so
1871 * we don't do the PING-PONG game here but instead
1872 * disconnect the client after "a short time" if it's
1873 * still not registered. */
1875 if (My_Connections[i].lastdata <
1876 time(NULL) - Conf_PongTimeout) {
1878 ("Unregistered connection %d timed out ...",
1880 Conn_Close(i, NULL, "Timeout", false);
1884 } /* Check_Connections */
1887 * Check if further server links should be established.
1895 time_now = time(NULL);
1897 /* Check all configured servers */
1898 for (i = 0; i < MAX_SERVERS; i++) {
1899 if (Conf_Server[i].conn_id != NONE)
1900 continue; /* Already establishing or connected */
1901 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1902 continue; /* No host and/or port configured */
1903 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1904 continue; /* Disabled configuration entry */
1905 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1906 continue; /* We have to wait a little bit ... */
1908 /* Is there already a connection in this group? */
1909 if (Conf_Server[i].group > NONE) {
1910 for (n = 0; n < MAX_SERVERS; n++) {
1913 if ((Conf_Server[n].conn_id != NONE) &&
1914 (Conf_Server[n].group == Conf_Server[i].group))
1917 if (n < MAX_SERVERS)
1921 /* Okay, try to connect now */
1923 "Preparing to establish a new server link for \"%s\" ...",
1924 Conf_Server[i].name);
1925 Conf_Server[i].lasttry = time_now;
1926 Conf_Server[i].conn_id = SERVER_WAIT;
1927 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1929 /* Start resolver subprocess ... */
1930 if (!Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1931 cb_Connect_to_Server))
1932 Conf_Server[i].conn_id = NONE;
1934 } /* Check_Servers */
1937 * Establish a new outgoing server connection.
1939 * @param Server Configuration index of the server.
1940 * @param dest Destination IP address to connect to.
1943 New_Server( int Server , ng_ipaddr_t *dest)
1945 /* Establish new server link */
1946 char ip_str[NG_INET_ADDRSTRLEN];
1947 int af_dest, res, new_sock;
1950 assert( Server > NONE );
1952 /* Make sure that the remote server hasn't re-linked to this server
1953 * asynchronously on its own */
1954 if (Conf_Server[Server].conn_id > NONE) {
1956 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
1960 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1961 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1962 Conf_Server[Server].conn_id = NONE;
1966 af_dest = ng_ipaddr_af(dest);
1967 new_sock = socket(af_dest, SOCK_STREAM, 0);
1970 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
1971 Conf_Server[Server].name, Conf_Server[Server].host,
1972 Conf_Server[Server].port, ip_str, new_sock);
1975 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
1976 af_dest, strerror(errno));
1977 Conf_Server[Server].conn_id = NONE;
1981 if (!Init_Socket(new_sock)) {
1982 Conf_Server[Server].conn_id = NONE;
1986 /* is a bind address configured? */
1987 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1989 /* if yes, bind now. If it fails, warn and let connect() pick a
1991 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1992 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1994 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1995 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
1998 ng_ipaddr_setport(dest, Conf_Server[Server].port);
1999 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
2000 if(( res != 0 ) && ( errno != EINPROGRESS )) {
2001 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2003 Conf_Server[Server].conn_id = NONE;
2007 if (Socket2Index(new_sock) <= NONE) {
2009 Conf_Server[Server].conn_id = NONE;
2013 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2014 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2017 Conf_Server[Server].conn_id = NONE;
2021 assert(My_Connections[new_sock].sock <= 0);
2023 Init_Conn_Struct(new_sock);
2025 ng_ipaddr_tostr_r(dest, ip_str);
2026 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2028 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2030 Conf_Server[Server].conn_id = NONE;
2034 /* Conn_Close() decrements this counter again */
2035 Account_Connection();
2036 Client_SetIntroducer( c, c );
2037 Client_SetToken( c, TOKEN_OUTBOUND );
2039 /* Register connection */
2040 if (!Conf_SetServer(Server, new_sock))
2042 My_Connections[new_sock].sock = new_sock;
2043 My_Connections[new_sock].addr = *dest;
2044 My_Connections[new_sock].client = c;
2045 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2046 sizeof(My_Connections[new_sock].host ));
2049 if (Conf_Server[Server].SSLConnect &&
2050 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2052 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2053 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2055 Init_Conn_Struct(new_sock);
2056 Conf_Server[Server].conn_id = NONE;
2060 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2061 new_sock, My_Connections[new_sock].sock, NumConnections);
2062 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2066 * Initialize connection structure.
2068 * @param Idx Connection index.
2071 Init_Conn_Struct(CONN_ID Idx)
2073 time_t now = time(NULL);
2075 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2076 My_Connections[Idx].sock = -1;
2077 My_Connections[Idx].signon = now;
2078 My_Connections[Idx].lastdata = now;
2079 My_Connections[Idx].lastprivmsg = now;
2080 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2083 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2084 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2086 } /* Init_Conn_Struct */
2089 * Initialize options of a new socket.
2091 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2092 * The socket is automatically closed if a fatal error is encountered.
2094 * @param Sock Socket handle.
2095 * @returns false if socket was closed due to fatal error.
2098 Init_Socket( int Sock )
2102 if (!io_setnonblock(Sock)) {
2103 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2109 /* Don't block this port after socket shutdown */
2111 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2112 (socklen_t)sizeof(value)) != 0) {
2113 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2115 /* ignore this error */
2118 /* Set type of service (TOS) */
2119 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2120 value = IPTOS_LOWDELAY;
2121 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2122 (socklen_t) sizeof(value))) {
2123 LogDebug("Can't set socket option IP_TOS: %s!",
2125 /* ignore this error */
2127 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2135 * Read results of a resolver sub-process and try to initiate a new server
2138 * @param fd File descriptor of the pipe to the sub-process.
2139 * @param events (ignored IO specification)
2142 cb_Connect_to_Server(int fd, UNUSED short events)
2147 /* we can handle at most 3 addresses; but we read up to 4 so we can
2148 * log the 'more than we can handle' condition. First result is tried
2149 * immediately, rest is saved for later if needed. */
2150 ng_ipaddr_t dest_addrs[4];
2152 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2155 for (i=0; i < MAX_SERVERS; i++) {
2156 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2160 if( i >= MAX_SERVERS) {
2161 /* Ops, no matching server found?! */
2163 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2167 /* Read result from pipe */
2168 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2169 Proc_Close(&Conf_Server[i].res_stat);
2171 /* Error resolving hostname: reset server structure */
2172 Conf_Server[i].conn_id = NONE;
2176 assert((len % sizeof(ng_ipaddr_t)) == 0);
2178 LogDebug("Got result from resolver: %u structs (%u bytes).",
2179 len/sizeof(ng_ipaddr_t), len);
2181 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2182 if (len > sizeof(ng_ipaddr_t)) {
2183 /* more than one address for this hostname, remember them
2184 * in case first address is unreachable/not available */
2185 len -= sizeof(ng_ipaddr_t);
2186 if (len > sizeof(Conf_Server[i].dst_addr)) {
2187 len = sizeof(Conf_Server[i].dst_addr);
2189 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2191 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2194 New_Server(i, dest_addrs);
2195 } /* cb_Read_Forward_Lookup */
2198 * Read results of a resolver sub-process from the pipe and update the
2199 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2201 * @param r_fd File descriptor of the pipe to the sub-process.
2202 * @param events (ignored IO specification)
2205 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2212 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2215 char readbuf[HOST_LEN + 1];
2218 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2219 i = Conn_GetFromProc(r_fd);
2221 /* Ops, none found? Probably the connection has already
2222 * been closed!? We'll ignore that ... */
2224 LogDebug("Resolver: Got callback for unknown connection!?");
2228 /* Read result from pipe */
2229 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2230 Proc_Close(&My_Connections[i].proc_stat);
2234 readbuf[len] = '\0';
2235 identptr = strchr(readbuf, '\n');
2236 assert(identptr != NULL);
2238 Log( LOG_CRIT, "Resolver: Got malformed result!");
2243 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2244 /* Okay, we got a complete result: this is a host name for outgoing
2245 * connections and a host name and IDENT user name (if enabled) for
2246 * incoming connections.*/
2247 assert ( My_Connections[i].sock >= 0 );
2248 /* Incoming connection. Search client ... */
2249 c = Conn_GetClient( i );
2250 assert( c != NULL );
2252 /* Only update client information of unregistered clients.
2253 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2254 * the resolver results, so we don't have to worry to override settings
2255 * from these commands here. */
2256 if(Client_Type(c) == CLIENT_UNKNOWN) {
2257 strlcpy(My_Connections[i].host, readbuf,
2258 sizeof(My_Connections[i].host));
2259 Client_SetHostname(c, readbuf);
2260 if (Conf_NoticeBeforeRegistration)
2261 (void)Conn_WriteStr(i,
2262 "NOTICE * :*** Found your hostname: %s",
2263 My_Connections[i].host);
2269 if ((*ptr < '0' || *ptr > '9') &&
2270 (*ptr < 'A' || *ptr > 'Z') &&
2271 (*ptr < 'a' || *ptr > 'z'))
2276 /* Erroneous IDENT reply */
2278 "Got invalid IDENT reply for connection %d! Ignored.",
2282 "IDENT lookup for connection %d: \"%s\".",
2284 Client_SetUser(c, identptr, true);
2286 if (Conf_NoticeBeforeRegistration) {
2287 (void)Conn_WriteStr(i,
2288 "NOTICE * :*** Got %sident response%s%s",
2289 *ptr ? "invalid " : "",
2291 *ptr ? "" : identptr);
2293 } else if(Conf_Ident) {
2294 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2295 if (Conf_NoticeBeforeRegistration)
2296 (void)Conn_WriteStr(i,
2297 "NOTICE * :*** No ident response");
2301 if (Conf_NoticeBeforeRegistration) {
2302 /* Send buffered data to the client, but break on
2303 * errors because Handle_Write() would have closed
2304 * the connection again in this case! */
2305 if (!Handle_Write(i))
2309 Class_HandleServerBans(c);
2313 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2315 } /* cb_Read_Resolver_Result */
2318 * Write a "simple" (error) message to a socket.
2320 * The message is sent without using the connection write buffers, without
2321 * compression/encryption, and even without any error reporting. It is
2322 * designed for error messages of e.g. New_Connection().
2324 * @param Sock Socket handle.
2325 * @param Msg Message string to send.
2328 Simple_Message(int Sock, const char *Msg)
2330 char buf[COMMAND_LEN];
2333 assert(Sock > NONE);
2334 assert(Msg != NULL);
2336 strlcpy(buf, Msg, sizeof buf - 2);
2337 len = strlcat(buf, "\r\n", sizeof buf);
2338 if (write(Sock, buf, len) < 0) {
2339 /* Because this function most probably got called to log
2340 * an error message, any write error is ignored here to
2341 * avoid an endless loop. But casting the result of write()
2342 * to "void" doesn't satisfy the GNU C code attribute
2343 * "warn_unused_result" which is used by some versions of
2344 * glibc (e.g. 2.11.1), therefore this silly error
2345 * "handling" code here :-( */
2348 } /* Simple_Error */
2351 * Get CLIENT structure that belongs to a local connection identified by its
2352 * index number. Each connection belongs to a client by definition, so it is
2353 * not required that the caller checks for NULL return values.
2355 * @param Idx Connection index number.
2356 * @returns Pointer to CLIENT structure.
2359 Conn_GetClient( CONN_ID Idx )
2364 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2366 return c ? c->client : NULL;
2370 * Get PROC_STAT sub-process structure of a connection.
2372 * @param Idx Connection index number.
2373 * @returns PROC_STAT structure.
2376 Conn_GetProcStat(CONN_ID Idx)
2381 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2383 return &c->proc_stat;
2384 } /* Conn_GetProcStat */
2387 * Get CONN_ID from file descriptor associated to a subprocess structure.
2389 * @param fd File descriptor.
2390 * @returns CONN_ID or NONE (-1).
2393 Conn_GetFromProc(int fd)
2398 for (i = 0; i < Pool_Size; i++) {
2399 if ((My_Connections[i].sock != NONE)
2400 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2404 } /* Conn_GetFromProc */
2407 * Throttle a connection because of excessive usage.
2409 * @param Reason The reason, see THROTTLE_xxx constants.
2410 * @param Idx The connection index.
2411 * @param Client The client of this connection.
2412 * @param Value The time to delay this connection.
2415 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2419 assert(Client != NULL);
2421 /* Never throttle servers or services, only interrupt processing */
2422 if (Client_Type(Client) == CLIENT_SERVER
2423 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2424 || Client_Type(Client) == CLIENT_SERVICE)
2427 /* Don't throttle clients with user mode 'F' set */
2428 if (Client_HasMode(Client, 'F'))
2431 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2433 Conn_SetPenalty(Idx, 1);
2439 Conn_GetAuthPing(CONN_ID Idx)
2441 assert (Idx != NONE);
2442 return My_Connections[Idx].auth_ping;
2443 } /* Conn_GetAuthPing */
2446 Conn_SetAuthPing(CONN_ID Idx, long ID)
2448 assert (Idx != NONE);
2449 My_Connections[Idx].auth_ping = ID;
2450 } /* Conn_SetAuthPing */
2452 #endif /* STRICT_RFC */
2457 * IO callback for new SSL-enabled client and server connections.
2459 * @param sock Socket descriptor.
2460 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2463 cb_clientserver_ssl(int sock, UNUSED short what)
2465 CONN_ID idx = Socket2Index(sock);
2472 switch (ConnSSL_Accept(&My_Connections[idx])) {
2476 return; /* EAGAIN: callback will be invoked again by IO layer */
2479 "SSL accept error, closing socket", "SSL accept error",
2484 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2488 * IO callback for listening SSL sockets: handle new connections. This callback
2489 * gets called when a new SSL-enabled connection should be accepted.
2491 * @param sock Socket descriptor.
2492 * @param irrelevant (ignored IO specification)
2495 cb_listen_ssl(int sock, short irrelevant)
2500 fd = New_Connection(sock, true);
2503 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2507 * IO callback for new outgoing SSL-enabled server connections.
2509 * @param sock Socket descriptor.
2510 * @param unused (ignored IO specification)
2513 cb_connserver_login_ssl(int sock, short unused)
2515 CONN_ID idx = Socket2Index(sock);
2524 switch (ConnSSL_Connect( &My_Connections[idx])) {
2526 case 0: LogDebug("ConnSSL_Connect: not ready");
2529 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2530 Conn_Close(idx, "Can't connect", NULL, false);
2534 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2535 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2542 * Check if SSL library needs to read SSL-protocol related data.
2544 * SSL/TLS connections require extra treatment:
2545 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2546 * need to take care of that first, before checking read/write buffers.
2547 * For instance, while we might have data in our write buffer, the
2548 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2549 * writes to succeed.
2551 * If this function returns true, such a condition is met and we have
2552 * to reverse the condition (check for read even if we've data to write,
2553 * do not check for read but writeability even if write-buffer is empty).
2555 * @param c Connection to check.
2556 * @returns true if SSL-library has to read protocol data.
2559 SSL_WantRead(const CONNECTION *c)
2561 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2562 io_event_add(c->sock, IO_WANTREAD);
2569 * Check if SSL library needs to write SSL-protocol related data.
2571 * Please see description of SSL_WantRead() for full description!
2573 * @param c Connection to check.
2574 * @returns true if SSL-library has to write protocol data.
2577 SSL_WantWrite(const CONNECTION *c)
2579 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2580 io_event_add(c->sock, IO_WANTWRITE);
2587 * Get information about used SSL cipher.
2589 * @param Idx Connection index number.
2590 * @param buf Buffer for returned information text.
2591 * @param len Size of return buffer "buf".
2592 * @returns true on success, false otherwise.
2595 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2599 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2600 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2604 * Check if a connection is SSL-enabled or not.
2606 * @param Idx Connection index number.
2607 * @return true if connection is SSL-enabled, false otherwise.
2610 Conn_UsesSSL(CONN_ID Idx)
2614 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2615 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2619 Conn_GetCertFp(CONN_ID Idx)
2623 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2624 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2628 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2632 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2633 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2636 #else /* SSL_SUPPORT */
2639 Conn_UsesSSL(UNUSED CONN_ID Idx)
2645 Conn_GetCertFp(UNUSED CONN_ID Idx)
2651 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2656 #endif /* SSL_SUPPORT */
2661 * Dump internal state of the "connection module".
2664 Conn_DebugDump(void)
2668 Log(LOG_DEBUG, "Connection status:");
2669 for (i = 0; i < Pool_Size; i++) {
2670 if (My_Connections[i].sock == NONE)
2673 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2674 My_Connections[i].sock, My_Connections[i].host,
2675 My_Connections[i].lastdata, My_Connections[i].lastping,
2676 My_Connections[i].delaytime, My_Connections[i].flag,
2677 My_Connections[i].options, My_Connections[i].bps,
2678 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2680 } /* Conn_DumpClients */