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 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1277 "Write error on connection %d (socket %d): %s!",
1278 Idx, My_Connections[Idx].sock, strerror(errno));
1280 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1281 Idx, My_Connections[Idx].sock, strerror(errno));
1282 Conn_Close(Idx, "Write error", NULL, false);
1286 /* move any data not yet written to beginning */
1287 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1290 } /* Handle_Write */
1293 * Count established connections to a specific IP address.
1295 * @returns Number of established connections.
1298 Count_Connections(ng_ipaddr_t *a)
1303 for (i = 0; i < Pool_Size; i++) {
1304 if (My_Connections[i].sock <= NONE)
1306 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1310 } /* Count_Connections */
1313 * Initialize new client connection on a listening socket.
1315 * @param Sock Listening socket descriptor.
1316 * @param IsSSL true if this socket expects SSL-encrypted data.
1317 * @returns Accepted socket descriptor or -1 on error.
1320 New_Connection(int Sock, UNUSED bool IsSSL)
1323 struct request_info req;
1325 ng_ipaddr_t new_addr;
1326 char ip_str[NG_INET_ADDRSTRLEN];
1327 int new_sock, new_sock_len;
1331 assert(Sock > NONE);
1333 LogDebug("Accepting new connection on socket %d ...", Sock);
1335 new_sock_len = (int)sizeof(new_addr);
1336 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1337 (socklen_t *)&new_sock_len);
1339 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1342 NumConnectionsAccepted++;
1344 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1345 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1346 Simple_Message(new_sock, "ERROR :Internal Server Error");
1352 /* Validate socket using TCP Wrappers */
1353 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1354 RQ_CLIENT_SIN, &new_addr, NULL);
1356 if (!hosts_access(&req)) {
1358 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1359 Simple_Message(new_sock, "ERROR :Connection refused");
1365 if (!Init_Socket(new_sock))
1368 /* Check global connection limit */
1369 if ((Conf_MaxConnections > 0) &&
1370 (NumConnections >= (size_t) Conf_MaxConnections)) {
1371 Log(LOG_ALERT, "Can't accept new connection on socket %d: Limit (%d) reached!",
1372 Sock, Conf_MaxConnections);
1373 Simple_Message(new_sock, "ERROR :Connection limit reached");
1378 /* Check IP-based connection limit */
1379 cnt = Count_Connections(&new_addr);
1380 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1381 /* Access denied, too many connections from this IP address! */
1383 "Refused connection from %s: too may connections (%ld) from this IP address!",
1385 Simple_Message(new_sock,
1386 "ERROR :Connection refused, too many connections from your IP address");
1391 if (Socket2Index(new_sock) <= NONE) {
1392 Simple_Message(new_sock, "ERROR: Internal error");
1397 /* register callback */
1398 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1400 "Can't accept connection: io_event_create failed!");
1401 Simple_Message(new_sock, "ERROR :Internal error");
1406 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1409 "Can't accept connection: can't create client structure!");
1410 Simple_Message(new_sock, "ERROR :Internal error");
1415 Init_Conn_Struct(new_sock);
1416 My_Connections[new_sock].sock = new_sock;
1417 My_Connections[new_sock].addr = new_addr;
1418 My_Connections[new_sock].client = c;
1420 /* Set initial hostname to IP address. This becomes overwritten when
1421 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1422 if (ng_ipaddr_af(&new_addr) != AF_INET)
1423 snprintf(My_Connections[new_sock].host,
1424 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1426 strlcpy(My_Connections[new_sock].host, ip_str,
1427 sizeof(My_Connections[new_sock].host));
1429 Client_SetHostname(c, My_Connections[new_sock].host);
1431 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1432 new_sock, My_Connections[new_sock].host,
1433 ng_ipaddr_getport(&new_addr), Sock);
1434 Account_Connection();
1437 /* Delay connection initalization until SSL handshake is finished */
1440 Conn_StartLogin(new_sock);
1443 } /* New_Connection */
1446 * Finish connection initialization, start resolver subprocess.
1448 * @param Idx Connection index.
1451 Conn_StartLogin(CONN_ID Idx)
1453 int ident_sock = -1;
1457 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1462 /* Should we make an IDENT request? */
1464 ident_sock = My_Connections[Idx].sock;
1467 if (Conf_NoticeBeforeRegistration) {
1468 /* Send "NOTICE *" messages to the client */
1471 (void)Conn_WriteStr(Idx,
1472 "NOTICE * :*** Looking up your hostname and checking ident");
1475 (void)Conn_WriteStr(Idx,
1476 "NOTICE * :*** Looking up your hostname");
1477 /* Send buffered data to the client, but break on errors
1478 * because Handle_Write() would have closed the connection
1479 * again in this case! */
1480 if (!Handle_Write(Idx))
1484 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1485 ident_sock, cb_Read_Resolver_Result);
1489 * Update global connection counters.
1492 Account_Connection(void)
1496 if (NumConnections > NumConnectionsMax)
1497 NumConnectionsMax = NumConnections;
1498 LogDebug("Total number of connections now %lu (max %lu).",
1499 NumConnections, NumConnectionsMax);
1500 } /* Account_Connection */
1503 * Translate socket handle into connection index (for historical reasons, it is
1504 * a 1:1 mapping today) and enlarge the "connection pool" accordingly.
1506 * @param Sock Socket handle.
1507 * @returns Connecion index or NONE when the pool is too small.
1510 Socket2Index( int Sock )
1513 assert(Pool_Size >= 0);
1515 if (Sock < Pool_Size)
1518 /* Try to allocate more memory ... */
1519 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Sock)) {
1521 "Can't allocate memory to enlarge connection pool!");
1524 LogDebug("Enlarged connection pool for %ld sockets (%ld items, %ld bytes)",
1525 Sock, array_length(&My_ConnArray, sizeof(CONNECTION)),
1526 array_bytes(&My_ConnArray));
1528 /* Adjust pointer to new block, update size and initialize new items. */
1529 My_Connections = array_start(&My_ConnArray);
1530 while (Pool_Size <= Sock)
1531 Init_Conn_Struct(Pool_Size++);
1537 * Read data from the network to the read buffer. If an error occurs,
1538 * the socket of this connection will be shut down.
1540 * @param Idx Connection index.
1543 Read_Request( CONN_ID Idx )
1546 static const unsigned int maxbps = COMMAND_LEN / 2;
1547 char readbuf[READBUFFER_LEN];
1550 assert( Idx > NONE );
1551 assert( My_Connections[Idx].sock > NONE );
1554 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1555 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1557 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1560 /* Read buffer is full */
1562 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1563 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1564 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1569 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1570 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1573 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1575 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1576 My_Connections[Idx].host,
1577 ng_ipaddr_getport(&My_Connections[Idx].addr), Idx);
1578 Conn_Close(Idx, NULL, "Client closed connection", false);
1583 if( errno == EAGAIN ) return;
1584 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1585 Idx, My_Connections[Idx].sock, strerror(errno));
1586 Conn_Close(Idx, "Read error", "Client closed connection",
1591 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1592 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1595 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1597 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1604 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1606 "Could not append received data to input buffer (connection %d): %d bytes!",
1608 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1613 /* Update connection statistics */
1614 My_Connections[Idx].bytes_in += len;
1616 /* Handle read buffer */
1617 My_Connections[Idx].bps += Handle_Buffer(Idx);
1619 /* Make sure that there is still a valid client registered */
1620 c = Conn_GetClient(Idx);
1624 /* Update timestamp of last data received if this connection is
1625 * registered as a user, server or service connection. Don't update
1626 * otherwise, so users have at least Conf_PongTimeout seconds time to
1627 * register with the IRC server -- see Check_Connections().
1628 * Update "lastping", too, if time shifted backwards ... */
1629 if (Client_Type(c) == CLIENT_USER
1630 || Client_Type(c) == CLIENT_SERVER
1631 || Client_Type(c) == CLIENT_SERVICE) {
1633 if (My_Connections[Idx].lastdata != t)
1634 My_Connections[Idx].bps = 0;
1636 My_Connections[Idx].lastdata = t;
1637 if (My_Connections[Idx].lastping > t)
1638 My_Connections[Idx].lastping = t;
1641 /* Look at the data in the (read-) buffer of this connection */
1642 if (My_Connections[Idx].bps >= maxbps)
1643 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1644 } /* Read_Request */
1647 * Handle all data in the connection read-buffer.
1649 * Data is processed until no complete command is left in the read buffer,
1650 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1651 * When a fatal error occurs, the connection is shut down.
1653 * @param Idx Index of the connection.
1654 * @returns Number of bytes processed.
1657 Handle_Buffer(CONN_ID Idx)
1660 char *ptr1, *ptr2, *first_eol;
1668 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1671 c = Conn_GetClient(Idx);
1672 starttime = time(NULL);
1676 /* Servers get special command limits that depend on the user count */
1677 switch (Client_Type(c)) {
1679 maxcmd = (int)(Client_UserCount() / 5)
1680 + MAX_COMMANDS_SERVER_MIN;
1681 /* Allow servers to handle even more commands while peering
1682 * to speed up server login and network synchronization. */
1683 if (Conn_LastPing(Idx) == 0)
1686 case CLIENT_SERVICE:
1687 maxcmd = MAX_COMMANDS_SERVICE;
1690 if (Client_HasMode(c, 'F'))
1691 maxcmd = MAX_COMMANDS_SERVICE;
1695 for (i=0; i < maxcmd; i++) {
1697 if (My_Connections[Idx].delaytime > starttime)
1700 /* Unpack compressed data, if compression is in use */
1701 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1702 /* When unzipping fails, Unzip_Buffer() shuts
1703 * down the connection itself */
1704 if (!Unzip_Buffer(Idx))
1709 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1712 /* Make sure that the buffer is NULL terminated */
1713 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1714 Conn_Close(Idx, NULL,
1715 "Can't allocate memory [Handle_Buffer]",
1720 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1721 * "IRC messages are always lines of characters terminated
1722 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1724 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1727 /* Check for non-RFC-compliant request (only CR or LF)?
1728 * Unfortunately, there are quite a few clients out there
1729 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1730 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1731 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1733 /* Check if there is a single CR or LF _before_ the
1734 * correct CR+LF line terminator: */
1735 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1736 if (first_eol < ptr) {
1737 /* Single CR or LF before CR+LF found */
1741 } else if (ptr1 || ptr2) {
1742 /* No CR+LF terminated command found, but single
1743 * CR or LF found ... */
1745 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1747 ptr = ptr1 ? ptr1 : ptr2;
1755 /* Complete (=line terminated) request found, handle it! */
1758 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1760 if (len > (COMMAND_LEN - 1)) {
1761 /* Request must not exceed 512 chars (incl. CR+LF!),
1762 * see RFC 2812. Disconnect Client if this happens. */
1764 "Request too long (connection %d): %d bytes (max. %d expected)!",
1765 Idx, array_bytes(&My_Connections[Idx].rbuf),
1767 Conn_Close(Idx, NULL, "Request too long", true);
1771 len_processed += (unsigned int)len;
1773 /* Request is empty (only '\r\n', '\r' or '\n');
1774 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1775 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1779 /* remember if stream is already compressed */
1780 old_z = My_Connections[Idx].options & CONN_ZIP;
1783 My_Connections[Idx].msg_in++;
1785 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1786 return 0; /* error -> connection has been closed */
1788 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1790 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1791 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1792 /* The last command activated socket compression.
1793 * Data that was read after that needs to be copied
1794 * to the unzip buffer for decompression: */
1796 (&My_Connections[Idx].zip.rbuf,
1797 &My_Connections[Idx].rbuf)) {
1798 Conn_Close(Idx, NULL,
1799 "Can't allocate memory [Handle_Buffer]",
1804 array_trunc(&My_Connections[Idx].rbuf);
1806 ("Moved already received data (%u bytes) to uncompression buffer.",
1807 array_bytes(&My_Connections[Idx].zip.rbuf));
1812 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1813 Idx, i, maxcmd, len_processed,
1814 array_bytes(&My_Connections[Idx].rbuf));
1817 /* If data has been processed but there is still data in the read
1818 * buffer, the command limit triggered. Enforce the penalty time: */
1819 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1820 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1822 return len_processed;
1823 } /* Handle_Buffer */
1826 * Check whether established connections are still alive or not.
1827 * If not, play PING-PONG first; and if that doesn't help either,
1828 * disconnect the respective peer.
1831 Check_Connections(void)
1837 for (i = 0; i < Pool_Size; i++) {
1838 if (My_Connections[i].sock < 0)
1841 c = Conn_GetClient(i);
1842 if (c && ((Client_Type(c) == CLIENT_USER)
1843 || (Client_Type(c) == CLIENT_SERVER)
1844 || (Client_Type(c) == CLIENT_SERVICE))) {
1845 /* connected User, Server or Service */
1846 if (My_Connections[i].lastping >
1847 My_Connections[i].lastdata) {
1848 /* We already sent a ping */
1849 if (My_Connections[i].lastping <
1850 time(NULL) - Conf_PongTimeout) {
1852 snprintf(msg, sizeof(msg),
1853 "Ping timeout: %d seconds",
1855 LogDebug("Connection %d: %s.", i, msg);
1856 Conn_Close(i, NULL, msg, true);
1858 } else if (My_Connections[i].lastdata <
1859 time(NULL) - Conf_PingTimeout) {
1860 /* We need to send a PING ... */
1861 LogDebug("Connection %d: sending PING ...", i);
1863 Conn_WriteStr(i, "PING :%s",
1864 Client_ID(Client_ThisServer()));
1867 /* The connection is not fully established yet, so
1868 * we don't do the PING-PONG game here but instead
1869 * disconnect the client after "a short time" if it's
1870 * still not registered. */
1872 if (My_Connections[i].lastdata <
1873 time(NULL) - Conf_PongTimeout) {
1875 ("Unregistered connection %d timed out ...",
1877 Conn_Close(i, NULL, "Timeout", false);
1881 } /* Check_Connections */
1884 * Check if further server links should be established.
1892 time_now = time(NULL);
1894 /* Check all configured servers */
1895 for (i = 0; i < MAX_SERVERS; i++) {
1896 if (Conf_Server[i].conn_id != NONE)
1897 continue; /* Already establishing or connected */
1898 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1899 continue; /* No host and/or port configured */
1900 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1901 continue; /* Disabled configuration entry */
1902 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1903 continue; /* We have to wait a little bit ... */
1905 /* Is there already a connection in this group? */
1906 if (Conf_Server[i].group > NONE) {
1907 for (n = 0; n < MAX_SERVERS; n++) {
1910 if ((Conf_Server[n].conn_id != NONE) &&
1911 (Conf_Server[n].group == Conf_Server[i].group))
1914 if (n < MAX_SERVERS)
1918 /* Okay, try to connect now */
1920 "Preparing to establish a new server link for \"%s\" ...",
1921 Conf_Server[i].name);
1922 Conf_Server[i].lasttry = time_now;
1923 Conf_Server[i].conn_id = SERVER_WAIT;
1924 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1926 /* Start resolver subprocess ... */
1927 if (!Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1928 cb_Connect_to_Server))
1929 Conf_Server[i].conn_id = NONE;
1931 } /* Check_Servers */
1934 * Establish a new outgoing server connection.
1936 * @param Server Configuration index of the server.
1937 * @param dest Destination IP address to connect to.
1940 New_Server( int Server , ng_ipaddr_t *dest)
1942 /* Establish new server link */
1943 char ip_str[NG_INET_ADDRSTRLEN];
1944 int af_dest, res, new_sock;
1947 assert( Server > NONE );
1949 /* Make sure that the remote server hasn't re-linked to this server
1950 * asynchronously on its own */
1951 if (Conf_Server[Server].conn_id > NONE) {
1953 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
1957 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1958 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1959 Conf_Server[Server].conn_id = NONE;
1963 af_dest = ng_ipaddr_af(dest);
1964 new_sock = socket(af_dest, SOCK_STREAM, 0);
1967 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
1968 Conf_Server[Server].name, Conf_Server[Server].host,
1969 Conf_Server[Server].port, ip_str, new_sock);
1972 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
1973 af_dest, strerror(errno));
1974 Conf_Server[Server].conn_id = NONE;
1978 if (!Init_Socket(new_sock)) {
1979 Conf_Server[Server].conn_id = NONE;
1983 /* is a bind address configured? */
1984 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1986 /* if yes, bind now. If it fails, warn and let connect() pick a
1988 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1989 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1991 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1992 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
1995 ng_ipaddr_setport(dest, Conf_Server[Server].port);
1996 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
1997 if(( res != 0 ) && ( errno != EINPROGRESS )) {
1998 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2000 Conf_Server[Server].conn_id = NONE;
2004 if (Socket2Index(new_sock) <= NONE) {
2006 Conf_Server[Server].conn_id = NONE;
2010 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2011 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2014 Conf_Server[Server].conn_id = NONE;
2018 assert(My_Connections[new_sock].sock <= 0);
2020 Init_Conn_Struct(new_sock);
2022 ng_ipaddr_tostr_r(dest, ip_str);
2023 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2025 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2027 Conf_Server[Server].conn_id = NONE;
2031 /* Conn_Close() decrements this counter again */
2032 Account_Connection();
2033 Client_SetIntroducer( c, c );
2034 Client_SetToken( c, TOKEN_OUTBOUND );
2036 /* Register connection */
2037 if (!Conf_SetServer(Server, new_sock))
2039 My_Connections[new_sock].sock = new_sock;
2040 My_Connections[new_sock].addr = *dest;
2041 My_Connections[new_sock].client = c;
2042 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2043 sizeof(My_Connections[new_sock].host ));
2046 if (Conf_Server[Server].SSLConnect &&
2047 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2049 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2050 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2052 Init_Conn_Struct(new_sock);
2053 Conf_Server[Server].conn_id = NONE;
2057 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2058 new_sock, My_Connections[new_sock].sock, NumConnections);
2059 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2063 * Initialize connection structure.
2065 * @param Idx Connection index.
2068 Init_Conn_Struct(CONN_ID Idx)
2070 time_t now = time(NULL);
2072 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2073 My_Connections[Idx].sock = -1;
2074 My_Connections[Idx].signon = now;
2075 My_Connections[Idx].lastdata = now;
2076 My_Connections[Idx].lastprivmsg = now;
2077 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2080 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2081 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2083 } /* Init_Conn_Struct */
2086 * Initialize options of a new socket.
2088 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2089 * The socket is automatically closed if a fatal error is encountered.
2091 * @param Sock Socket handle.
2092 * @returns false if socket was closed due to fatal error.
2095 Init_Socket( int Sock )
2099 if (!io_setnonblock(Sock)) {
2100 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2106 /* Don't block this port after socket shutdown */
2108 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2109 (socklen_t)sizeof(value)) != 0) {
2110 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2112 /* ignore this error */
2115 /* Set type of service (TOS) */
2116 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2117 value = IPTOS_LOWDELAY;
2118 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2119 (socklen_t) sizeof(value))) {
2120 LogDebug("Can't set socket option IP_TOS: %s!",
2122 /* ignore this error */
2124 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2132 * Read results of a resolver sub-process and try to initiate a new server
2135 * @param fd File descriptor of the pipe to the sub-process.
2136 * @param events (ignored IO specification)
2139 cb_Connect_to_Server(int fd, UNUSED short events)
2144 /* we can handle at most 3 addresses; but we read up to 4 so we can
2145 * log the 'more than we can handle' condition. First result is tried
2146 * immediately, rest is saved for later if needed. */
2147 ng_ipaddr_t dest_addrs[4];
2149 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2152 for (i=0; i < MAX_SERVERS; i++) {
2153 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2157 if( i >= MAX_SERVERS) {
2158 /* Ops, no matching server found?! */
2160 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2164 /* Read result from pipe */
2165 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2166 Proc_Close(&Conf_Server[i].res_stat);
2168 /* Error resolving hostname: reset server structure */
2169 Conf_Server[i].conn_id = NONE;
2173 assert((len % sizeof(ng_ipaddr_t)) == 0);
2175 LogDebug("Got result from resolver: %u structs (%u bytes).",
2176 len/sizeof(ng_ipaddr_t), len);
2178 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2179 if (len > sizeof(ng_ipaddr_t)) {
2180 /* more than one address for this hostname, remember them
2181 * in case first address is unreachable/not available */
2182 len -= sizeof(ng_ipaddr_t);
2183 if (len > sizeof(Conf_Server[i].dst_addr)) {
2184 len = sizeof(Conf_Server[i].dst_addr);
2186 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2188 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2191 New_Server(i, dest_addrs);
2192 } /* cb_Read_Forward_Lookup */
2195 * Read results of a resolver sub-process from the pipe and update the
2196 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2198 * @param r_fd File descriptor of the pipe to the sub-process.
2199 * @param events (ignored IO specification)
2202 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2209 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2212 char readbuf[HOST_LEN + 1];
2215 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2216 i = Conn_GetFromProc(r_fd);
2218 /* Ops, none found? Probably the connection has already
2219 * been closed!? We'll ignore that ... */
2221 LogDebug("Resolver: Got callback for unknown connection!?");
2225 /* Read result from pipe */
2226 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2227 Proc_Close(&My_Connections[i].proc_stat);
2231 readbuf[len] = '\0';
2232 identptr = strchr(readbuf, '\n');
2233 assert(identptr != NULL);
2235 Log( LOG_CRIT, "Resolver: Got malformed result!");
2240 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2241 /* Okay, we got a complete result: this is a host name for outgoing
2242 * connections and a host name and IDENT user name (if enabled) for
2243 * incoming connections.*/
2244 assert ( My_Connections[i].sock >= 0 );
2245 /* Incoming connection. Search client ... */
2246 c = Conn_GetClient( i );
2247 assert( c != NULL );
2249 /* Only update client information of unregistered clients.
2250 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2251 * the resolver results, so we don't have to worry to override settings
2252 * from these commands here. */
2253 if(Client_Type(c) == CLIENT_UNKNOWN) {
2254 strlcpy(My_Connections[i].host, readbuf,
2255 sizeof(My_Connections[i].host));
2256 Client_SetHostname(c, readbuf);
2257 if (Conf_NoticeBeforeRegistration)
2258 (void)Conn_WriteStr(i,
2259 "NOTICE * :*** Found your hostname: %s",
2260 My_Connections[i].host);
2266 if ((*ptr < '0' || *ptr > '9') &&
2267 (*ptr < 'A' || *ptr > 'Z') &&
2268 (*ptr < 'a' || *ptr > 'z'))
2273 /* Erroneous IDENT reply */
2275 "Got invalid IDENT reply for connection %d! Ignored.",
2279 "IDENT lookup for connection %d: \"%s\".",
2281 Client_SetUser(c, identptr, true);
2283 if (Conf_NoticeBeforeRegistration) {
2284 (void)Conn_WriteStr(i,
2285 "NOTICE * :*** Got %sident response%s%s",
2286 *ptr ? "invalid " : "",
2288 *ptr ? "" : identptr);
2290 } else if(Conf_Ident) {
2291 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2292 if (Conf_NoticeBeforeRegistration)
2293 (void)Conn_WriteStr(i,
2294 "NOTICE * :*** No ident response");
2298 if (Conf_NoticeBeforeRegistration) {
2299 /* Send buffered data to the client, but break on
2300 * errors because Handle_Write() would have closed
2301 * the connection again in this case! */
2302 if (!Handle_Write(i))
2306 Class_HandleServerBans(c);
2310 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2312 } /* cb_Read_Resolver_Result */
2315 * Write a "simple" (error) message to a socket.
2317 * The message is sent without using the connection write buffers, without
2318 * compression/encryption, and even without any error reporting. It is
2319 * designed for error messages of e.g. New_Connection().
2321 * @param Sock Socket handle.
2322 * @param Msg Message string to send.
2325 Simple_Message(int Sock, const char *Msg)
2327 char buf[COMMAND_LEN];
2330 assert(Sock > NONE);
2331 assert(Msg != NULL);
2333 strlcpy(buf, Msg, sizeof buf - 2);
2334 len = strlcat(buf, "\r\n", sizeof buf);
2335 if (write(Sock, buf, len) < 0) {
2336 /* Because this function most probably got called to log
2337 * an error message, any write error is ignored here to
2338 * avoid an endless loop. But casting the result of write()
2339 * to "void" doesn't satisfy the GNU C code attribute
2340 * "warn_unused_result" which is used by some versions of
2341 * glibc (e.g. 2.11.1), therefore this silly error
2342 * "handling" code here :-( */
2345 } /* Simple_Error */
2348 * Get CLIENT structure that belongs to a local connection identified by its
2349 * index number. Each connection belongs to a client by definition, so it is
2350 * not required that the caller checks for NULL return values.
2352 * @param Idx Connection index number.
2353 * @returns Pointer to CLIENT structure.
2356 Conn_GetClient( CONN_ID Idx )
2361 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2363 return c ? c->client : NULL;
2367 * Get PROC_STAT sub-process structure of a connection.
2369 * @param Idx Connection index number.
2370 * @returns PROC_STAT structure.
2373 Conn_GetProcStat(CONN_ID Idx)
2378 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2380 return &c->proc_stat;
2381 } /* Conn_GetProcStat */
2384 * Get CONN_ID from file descriptor associated to a subprocess structure.
2386 * @param fd File descriptor.
2387 * @returns CONN_ID or NONE (-1).
2390 Conn_GetFromProc(int fd)
2395 for (i = 0; i < Pool_Size; i++) {
2396 if ((My_Connections[i].sock != NONE)
2397 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2401 } /* Conn_GetFromProc */
2404 * Throttle a connection because of excessive usage.
2406 * @param Reason The reason, see THROTTLE_xxx constants.
2407 * @param Idx The connection index.
2408 * @param Client The client of this connection.
2409 * @param Value The time to delay this connection.
2412 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2416 assert(Client != NULL);
2418 /* Never throttle servers or services, only interrupt processing */
2419 if (Client_Type(Client) == CLIENT_SERVER
2420 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2421 || Client_Type(Client) == CLIENT_SERVICE)
2424 /* Don't throttle clients with user mode 'F' set */
2425 if (Client_HasMode(Client, 'F'))
2428 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2430 Conn_SetPenalty(Idx, 1);
2436 Conn_GetAuthPing(CONN_ID Idx)
2438 assert (Idx != NONE);
2439 return My_Connections[Idx].auth_ping;
2440 } /* Conn_GetAuthPing */
2443 Conn_SetAuthPing(CONN_ID Idx, long ID)
2445 assert (Idx != NONE);
2446 My_Connections[Idx].auth_ping = ID;
2447 } /* Conn_SetAuthPing */
2449 #endif /* STRICT_RFC */
2454 * IO callback for new SSL-enabled client and server connections.
2456 * @param sock Socket descriptor.
2457 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2460 cb_clientserver_ssl(int sock, UNUSED short what)
2462 CONN_ID idx = Socket2Index(sock);
2469 switch (ConnSSL_Accept(&My_Connections[idx])) {
2473 return; /* EAGAIN: callback will be invoked again by IO layer */
2476 "SSL accept error, closing socket", "SSL accept error",
2481 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2485 * IO callback for listening SSL sockets: handle new connections. This callback
2486 * gets called when a new SSL-enabled connection should be accepted.
2488 * @param sock Socket descriptor.
2489 * @param irrelevant (ignored IO specification)
2492 cb_listen_ssl(int sock, short irrelevant)
2497 fd = New_Connection(sock, true);
2500 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2504 * IO callback for new outgoing SSL-enabled server connections.
2506 * @param sock Socket descriptor.
2507 * @param unused (ignored IO specification)
2510 cb_connserver_login_ssl(int sock, short unused)
2512 CONN_ID idx = Socket2Index(sock);
2521 switch (ConnSSL_Connect( &My_Connections[idx])) {
2523 case 0: LogDebug("ConnSSL_Connect: not ready");
2526 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2527 Conn_Close(idx, "Can't connect", NULL, false);
2531 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2532 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2539 * Check if SSL library needs to read SSL-protocol related data.
2541 * SSL/TLS connections require extra treatment:
2542 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2543 * need to take care of that first, before checking read/write buffers.
2544 * For instance, while we might have data in our write buffer, the
2545 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2546 * writes to succeed.
2548 * If this function returns true, such a condition is met and we have
2549 * to reverse the condition (check for read even if we've data to write,
2550 * do not check for read but writeability even if write-buffer is empty).
2552 * @param c Connection to check.
2553 * @returns true if SSL-library has to read protocol data.
2556 SSL_WantRead(const CONNECTION *c)
2558 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2559 io_event_add(c->sock, IO_WANTREAD);
2566 * Check if SSL library needs to write SSL-protocol related data.
2568 * Please see description of SSL_WantRead() for full description!
2570 * @param c Connection to check.
2571 * @returns true if SSL-library has to write protocol data.
2574 SSL_WantWrite(const CONNECTION *c)
2576 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2577 io_event_add(c->sock, IO_WANTWRITE);
2584 * Get information about used SSL cipher.
2586 * @param Idx Connection index number.
2587 * @param buf Buffer for returned information text.
2588 * @param len Size of return buffer "buf".
2589 * @returns true on success, false otherwise.
2592 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2596 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2597 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2601 * Check if a connection is SSL-enabled or not.
2603 * @param Idx Connection index number.
2604 * @return true if connection is SSL-enabled, false otherwise.
2607 Conn_UsesSSL(CONN_ID Idx)
2611 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2612 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2616 Conn_GetCertFp(CONN_ID Idx)
2620 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2621 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2625 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2629 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2630 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2633 #else /* SSL_SUPPORT */
2636 Conn_UsesSSL(UNUSED CONN_ID Idx)
2642 Conn_GetCertFp(UNUSED CONN_ID Idx)
2648 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2653 #endif /* SSL_SUPPORT */
2658 * Dump internal state of the "connection module".
2661 Conn_DebugDump(void)
2665 Log(LOG_DEBUG, "Connection status:");
2666 for (i = 0; i < Pool_Size; i++) {
2667 if (My_Connections[i].sock == NONE)
2670 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2671 My_Connections[i].sock, My_Connections[i].host,
2672 My_Connections[i].lastdata, My_Connections[i].lastping,
2673 My_Connections[i].delaytime, My_Connections[i].flag,
2674 My_Connections[i].options, My_Connections[i].bps,
2675 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2677 } /* Conn_DumpClients */