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 if (array_bytes(&My_Connections[i].rbuf) >= COMMAND_LEN) {
738 /* There is still more data in the read buffer
739 * than a single valid command can get long:
740 * so either there is a complete command, or
741 * invalid data. Therefore don't try to read in
742 * even more data from the network but wait for
743 * this command(s) to be handled first! */
744 io_event_del(My_Connections[i].sock,
749 io_event_add(My_Connections[i].sock, IO_WANTREAD);
752 /* Set the timeout for reading from the network to 1 second,
753 * which is the granularity with witch we handle "penalty
754 * times" for example.
755 * Note: tv_sec/usec are undefined(!) after io_dispatch()
756 * returns, so we have to set it before each call to it! */
760 /* Wait for activity ... */
761 i = io_dispatch(&tv);
762 if (i == -1 && errno != EINTR) {
763 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
765 Log(LOG_ALERT, "%s exiting due to fatal errors!",
770 /* Should ngIRCd timeout when idle? */
771 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
772 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
773 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
775 Conf_IdleTimeout == 1 ? "" : "s");
776 NGIRCd_SignalQuit = true;
780 if (NGIRCd_SignalQuit)
781 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
782 else if (NGIRCd_SignalRestart)
783 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
787 * Write a text string into the socket of a connection.
789 * This function automatically appends CR+LF to the string and validates that
790 * the result is a valid IRC message (oversized messages are shortened, for
791 * example). Then it calls the Conn_Write() function to do the actual sending.
793 * @param Idx Index fo the connection.
794 * @param Format Format string, see printf().
795 * @returns true on success, false otherwise.
799 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
802 Conn_WriteStr(Idx, Format, va_alist)
808 char buffer[COMMAND_LEN];
817 assert( Idx > NONE );
818 assert( Format != NULL );
821 va_start( ap, Format );
825 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
826 if (r >= COMMAND_LEN - 2 || r == -1) {
828 * The string that should be written to the socket is longer
829 * than the allowed size of COMMAND_LEN bytes (including both
830 * the CR and LF characters). This can be caused by the
831 * IRC_WriteXXX() functions when the prefix of this server had
832 * to be added to an already "quite long" command line which
833 * has been received from a regular IRC client, for example.
835 * We are not allowed to send such "oversized" messages to
836 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
837 * ("these messages SHALL NOT exceed 512 characters in length,
838 * counting all characters including the trailing CR-LF").
840 * So we have a big problem here: we should send more bytes
841 * to the network than we are allowed to and we don't know
842 * the originator (any more). The "old" behavior of blaming
843 * the receiver ("next hop") is a bad idea (it could be just
844 * an other server only routing the message!), so the only
845 * option left is to shorten the string and to hope that the
846 * result is still somewhat useful ...
849 * C99 states that vsnprintf() "returns the number of characters
850 * that would have been printed if the n were unlimited"; but
851 * according to the Linux manual page "glibc until 2.0.6 would
852 * return -1 when the output was truncated" -- so we have to
853 * handle both cases ...
857 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
862 ptr = strchr(buffer + 1, ':');
865 message = Conn_EncodingTo(Idx, ptr);
867 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
873 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
876 len = strlcat( buffer, "\r\n", sizeof( buffer ));
877 ok = Conn_Write(Idx, buffer, len);
878 My_Connections[Idx].msg_out++;
882 } /* Conn_WriteStr */
885 Conn_Password( CONN_ID Idx )
887 assert( Idx > NONE );
888 if (My_Connections[Idx].pwd == NULL)
891 return My_Connections[Idx].pwd;
892 } /* Conn_Password */
895 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
897 assert( Idx > NONE );
899 if (My_Connections[Idx].pwd)
900 free(My_Connections[Idx].pwd);
902 My_Connections[Idx].pwd = strdup(Pwd);
903 if (My_Connections[Idx].pwd == NULL) {
904 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
907 } /* Conn_SetPassword */
910 * Append Data to the outbound write buffer of a connection.
912 * @param Idx Index of the connection.
913 * @param Data pointer to the data.
914 * @param Len length of Data.
915 * @returns true on success, false otherwise.
918 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
921 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
922 assert( Idx > NONE );
923 assert( Data != NULL );
926 /* Is the socket still open? A previous call to Conn_Write()
927 * may have closed the connection due to a fatal error.
928 * In this case it is sufficient to return an error, as well. */
929 if (My_Connections[Idx].sock <= NONE) {
930 LogDebug("Skipped write on closed socket (connection %d).", Idx);
934 /* Make sure that there still exists a CLIENT structure associated
935 * with this connection and check if this is a server or not: */
936 c = Conn_GetClient(Idx);
938 /* Servers do get special write buffer limits, so they can
939 * generate all the messages that are required while peering. */
940 if (Client_Type(c) == CLIENT_SERVER)
941 writebuf_limit = WRITEBUFFER_SLINK_LEN;
943 LogDebug("Write on socket without client (connection %d)!?", Idx);
946 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
948 * Zip_Buffer() does all the dirty work for us: it flushes
949 * the (pre-)compression buffers if required and handles
950 * all error conditions. */
951 if (!Zip_Buffer(Idx, Data, Len))
957 /* Uncompressed link:
958 * Check if outbound buffer has enough space for the data. */
959 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
960 WRITEBUFFER_FLUSH_LEN) {
961 /* Buffer is full, flush it. Handle_Write deals with
962 * low-level errors, if any. */
963 if (!Handle_Write(Idx))
967 /* When the write buffer is still too big after flushing it,
968 * the connection will be killed. */
969 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
972 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
973 Idx, writebuf_limit, Len,
974 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
975 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
979 /* Copy data to write buffer */
980 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
983 My_Connections[Idx].bytes_out += Len;
986 /* Adjust global write counter */
993 * Shut down a connection.
995 * @param Idx Connection index.
996 * @param LogMsg Message to write to the log or NULL. If no LogMsg
997 * is given, the FwdMsg is logged.
998 * @param FwdMsg Message to forward to remote servers.
999 * @param InformClient If true, inform the client on the connection which is
1000 * to be shut down of the reason (FwdMsg) and send
1001 * connection statistics before disconnecting it.
1004 Conn_Close(CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient)
1006 /* Close connection. Open pipes of asynchronous resolver
1007 * sub-processes are closed down. */
1013 double in_z_k, out_z_k;
1017 assert( Idx > NONE );
1019 /* Is this link already shutting down? */
1020 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1021 /* Conn_Close() has been called recursively for this link;
1022 * probable reason: Handle_Write() failed -- see below. */
1023 LogDebug("Recursive request to close connection %d!", Idx );
1027 assert( My_Connections[Idx].sock > NONE );
1029 /* Mark link as "closing" */
1030 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1032 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1033 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1034 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1036 /* Search client, if any */
1037 c = Conn_GetClient( Idx );
1039 /* Should the client be informed? */
1042 /* Send statistics to client if registered as user: */
1043 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1045 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1046 Client_ID(Client_ThisServer()), Client_ID(c),
1048 (double)My_Connections[Idx].bytes_in / 1024,
1049 (double)My_Connections[Idx].bytes_out / 1024);
1052 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1054 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
1056 Conn_WriteStr(Idx, "ERROR :Closing connection");
1059 /* Try to write out the write buffer. Note: Handle_Write() eventually
1060 * removes the CLIENT structure associated with this connection if an
1061 * error occurs! So we have to re-check if there is still an valid
1062 * CLIENT structure after calling Handle_Write() ...*/
1063 (void)Handle_Write( Idx );
1065 /* Search client, if any (re-check!) */
1066 c = Conn_GetClient( Idx );
1068 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1069 LogDebug("SSL connection %d shutting down ...", Idx);
1070 ConnSSL_Free(&My_Connections[Idx]);
1073 /* Shut down socket */
1074 if (! io_close(My_Connections[Idx].sock)) {
1075 /* Oops, we can't close the socket!? This is ... ugly! */
1077 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1078 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1079 port, strerror(errno));
1082 /* Mark socket as invalid: */
1083 My_Connections[Idx].sock = NONE;
1085 /* If there is still a client, unregister it now */
1087 Client_Destroy(c, LogMsg, FwdMsg, true);
1089 /* Calculate statistics and log information */
1090 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1091 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1093 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1094 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1095 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1096 /* Make sure that no division by zero can occur during
1097 * the calculation of in_p and out_p: in_z_k and out_z_k
1098 * are non-zero, that's guaranteed by the protocol until
1099 * compression can be enabled. */
1104 in_p = (int)(( in_k * 100 ) / in_z_k );
1105 out_p = (int)(( out_k * 100 ) / out_z_k );
1107 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1108 Idx, My_Connections[Idx].host, port,
1109 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1115 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1116 Idx, My_Connections[Idx].host, port,
1120 /* Servers: Modify time of next connect attempt? */
1121 Conf_UnsetServer( Idx );
1124 /* Clean up zlib, if link was compressed */
1125 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1126 inflateEnd( &My_Connections[Idx].zip.in );
1127 deflateEnd( &My_Connections[Idx].zip.out );
1128 array_free(&My_Connections[Idx].zip.rbuf);
1129 array_free(&My_Connections[Idx].zip.wbuf);
1133 array_free(&My_Connections[Idx].rbuf);
1134 array_free(&My_Connections[Idx].wbuf);
1135 if (My_Connections[Idx].pwd != NULL)
1136 free(My_Connections[Idx].pwd);
1138 /* Clean up connection structure (=free it) */
1139 Init_Conn_Struct( Idx );
1141 assert(NumConnections > 0);
1144 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1145 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1147 idle_t = NumConnections > 0 ? 0 : time(NULL);
1151 * Get current number of connections.
1153 * @returns Number of current connections.
1158 return NumConnections;
1162 * Get number of maximum simultaneous connections.
1164 * @returns Number of maximum simultaneous connections.
1169 return NumConnectionsMax;
1170 } /* Conn_CountMax */
1173 * Get number of connections accepted since the daemon startet.
1175 * @returns Number of connections accepted.
1178 Conn_CountAccepted(void)
1180 return NumConnectionsAccepted;
1181 } /* Conn_CountAccepted */
1184 * Synchronize established connections and configured server structures
1185 * after a configuration update and store the correct connection IDs, if any.
1188 Conn_SyncServerStruct(void)
1194 for (i = 0; i < Pool_Size; i++) {
1195 if (My_Connections[i].sock == NONE)
1199 client = Conn_GetClient(i);
1200 if (!client || Client_Type(client) != CLIENT_SERVER)
1203 for (c = 0; c < MAX_SERVERS; c++) {
1204 /* Configured server? */
1205 if (!Conf_Server[c].host[0])
1208 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1209 Conf_Server[c].conn_id = i;
1212 } /* SyncServerStruct */
1215 * Get IP address string of a connection.
1217 * @param Idx Connection index.
1218 * @return Pointer to a global buffer containing the IP address as string.
1221 Conn_GetIPAInfo(CONN_ID Idx)
1224 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1228 * Send out data of write buffer; connect new sockets.
1230 * @param Idx Connection index.
1231 * @returns true on success, false otherwise.
1234 Handle_Write( CONN_ID Idx )
1239 assert( Idx > NONE );
1240 if ( My_Connections[Idx].sock < 0 ) {
1241 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1244 assert( My_Connections[Idx].sock > NONE );
1246 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1249 if (wdatalen == 0) {
1250 /* Write buffer is empty, so we try to flush the compression
1251 * buffer and get some data to work with from there :-) */
1252 if (!Zip_Flush(Idx))
1255 /* Now the write buffer most probably has changed: */
1256 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1260 if (wdatalen == 0) {
1261 /* Still no data, fine. */
1262 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1268 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1273 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1274 len = ConnSSL_Write(&My_Connections[Idx],
1275 array_start(&My_Connections[Idx].wbuf),
1280 len = write(My_Connections[Idx].sock,
1281 array_start(&My_Connections[Idx].wbuf), wdatalen );
1284 if (errno == EAGAIN || errno == EINTR)
1287 /* Log write errors but do not close the connection yet.
1288 * Calling Conn_Close() now could result in too many recursive calls.
1290 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1292 "Write error on connection %d (socket %d): %s!",
1293 Idx, My_Connections[Idx].sock, strerror(errno));
1295 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1296 Idx, My_Connections[Idx].sock, strerror(errno));
1301 /* move any data not yet written to beginning */
1302 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1305 } /* Handle_Write */
1308 * Count established connections to a specific IP address.
1310 * @returns Number of established connections.
1313 Count_Connections(ng_ipaddr_t *a)
1318 for (i = 0; i < Pool_Size; i++) {
1319 if (My_Connections[i].sock <= NONE)
1321 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1325 } /* Count_Connections */
1328 * Initialize new client connection on a listening socket.
1330 * @param Sock Listening socket descriptor.
1331 * @param IsSSL true if this socket expects SSL-encrypted data.
1332 * @returns Accepted socket descriptor or -1 on error.
1335 New_Connection(int Sock, UNUSED bool IsSSL)
1338 struct request_info req;
1340 ng_ipaddr_t new_addr;
1341 char ip_str[NG_INET_ADDRSTRLEN];
1342 int new_sock, new_sock_len;
1346 assert(Sock > NONE);
1348 LogDebug("Accepting new connection on socket %d ...", Sock);
1350 new_sock_len = (int)sizeof(new_addr);
1351 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1352 (socklen_t *)&new_sock_len);
1354 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1357 NumConnectionsAccepted++;
1359 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1360 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1361 Simple_Message(new_sock, "ERROR :Internal Server Error");
1367 /* Validate socket using TCP Wrappers */
1368 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1369 RQ_CLIENT_SIN, &new_addr, NULL);
1371 if (!hosts_access(&req)) {
1373 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1374 Simple_Message(new_sock, "ERROR :Connection refused");
1380 if (!Init_Socket(new_sock))
1383 /* Check global connection limit */
1384 if ((Conf_MaxConnections > 0) &&
1385 (NumConnections >= (size_t) Conf_MaxConnections)) {
1386 Log(LOG_ALERT, "Can't accept new connection on socket %d: Limit (%d) reached!",
1387 Sock, Conf_MaxConnections);
1388 Simple_Message(new_sock, "ERROR :Connection limit reached");
1393 /* Check IP-based connection limit */
1394 cnt = Count_Connections(&new_addr);
1395 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1396 /* Access denied, too many connections from this IP address! */
1398 "Refused connection from %s: too may connections (%ld) from this IP address!",
1400 Simple_Message(new_sock,
1401 "ERROR :Connection refused, too many connections from your IP address");
1406 if (Socket2Index(new_sock) <= NONE) {
1407 Simple_Message(new_sock, "ERROR: Internal error");
1412 /* register callback */
1413 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1415 "Can't accept connection: io_event_create failed!");
1416 Simple_Message(new_sock, "ERROR :Internal error");
1421 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1424 "Can't accept connection: can't create client structure!");
1425 Simple_Message(new_sock, "ERROR :Internal error");
1430 Init_Conn_Struct(new_sock);
1431 My_Connections[new_sock].sock = new_sock;
1432 My_Connections[new_sock].addr = new_addr;
1433 My_Connections[new_sock].client = c;
1435 /* Set initial hostname to IP address. This becomes overwritten when
1436 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1437 if (ng_ipaddr_af(&new_addr) != AF_INET)
1438 snprintf(My_Connections[new_sock].host,
1439 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1441 strlcpy(My_Connections[new_sock].host, ip_str,
1442 sizeof(My_Connections[new_sock].host));
1444 Client_SetHostname(c, My_Connections[new_sock].host);
1446 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1447 new_sock, My_Connections[new_sock].host,
1448 ng_ipaddr_getport(&new_addr), Sock);
1449 Account_Connection();
1452 /* Delay connection initalization until SSL handshake is finished */
1455 Conn_StartLogin(new_sock);
1458 } /* New_Connection */
1461 * Finish connection initialization, start resolver subprocess.
1463 * @param Idx Connection index.
1466 Conn_StartLogin(CONN_ID Idx)
1468 int ident_sock = -1;
1472 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1477 /* Should we make an IDENT request? */
1479 ident_sock = My_Connections[Idx].sock;
1482 if (Conf_NoticeBeforeRegistration) {
1483 /* Send "NOTICE *" messages to the client */
1486 (void)Conn_WriteStr(Idx,
1487 "NOTICE * :*** Looking up your hostname and checking ident");
1490 (void)Conn_WriteStr(Idx,
1491 "NOTICE * :*** Looking up your hostname");
1492 /* Send buffered data to the client, but break on errors
1493 * because Handle_Write() would have closed the connection
1494 * again in this case! */
1495 if (!Handle_Write(Idx))
1499 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1500 ident_sock, cb_Read_Resolver_Result);
1504 * Update global connection counters.
1507 Account_Connection(void)
1511 if (NumConnections > NumConnectionsMax)
1512 NumConnectionsMax = NumConnections;
1513 LogDebug("Total number of connections now %lu (max %lu).",
1514 NumConnections, NumConnectionsMax);
1515 } /* Account_Connection */
1518 * Translate socket handle into connection index (for historical reasons, it is
1519 * a 1:1 mapping today) and enlarge the "connection pool" accordingly.
1521 * @param Sock Socket handle.
1522 * @returns Connecion index or NONE when the pool is too small.
1525 Socket2Index( int Sock )
1528 assert(Pool_Size >= 0);
1530 if (Sock < Pool_Size)
1533 /* Try to allocate more memory ... */
1534 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Sock)) {
1536 "Can't allocate memory to enlarge connection pool!");
1539 LogDebug("Enlarged connection pool for %ld sockets (%ld items, %ld bytes)",
1540 Sock, array_length(&My_ConnArray, sizeof(CONNECTION)),
1541 array_bytes(&My_ConnArray));
1543 /* Adjust pointer to new block, update size and initialize new items. */
1544 My_Connections = array_start(&My_ConnArray);
1545 while (Pool_Size <= Sock)
1546 Init_Conn_Struct(Pool_Size++);
1552 * Read data from the network to the read buffer. If an error occurs,
1553 * the socket of this connection will be shut down.
1555 * @param Idx Connection index.
1558 Read_Request(CONN_ID Idx)
1561 static const unsigned int maxbps = COMMAND_LEN / 2;
1562 char readbuf[READBUFFER_LEN];
1567 assert(My_Connections[Idx].sock > NONE);
1569 /* Check if the read buffer is "full". Basically this shouldn't happen
1570 * here, because as long as there possibly are commands in the read
1571 * buffer (buffer usage > COMMAND_LEN), the socket shouldn't be
1572 * scheduled for reading in Conn_Handler() at all ... */
1574 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1575 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1577 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1581 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1582 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1583 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1587 /* Now read new data from the network, up to READBUFFER_LEN bytes ... */
1589 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1590 len = ConnSSL_Read(&My_Connections[Idx], readbuf, sizeof(readbuf));
1593 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1596 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1597 My_Connections[Idx].host,
1598 ng_ipaddr_getport(&My_Connections[Idx].addr), Idx);
1599 Conn_Close(Idx, NULL, "Client closed connection", false);
1604 if (errno == EAGAIN)
1607 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1608 Idx, My_Connections[Idx].sock, strerror(errno));
1609 Conn_Close(Idx, "Read error", "Client closed connection",
1614 /* Now append the newly received data to the connection buffer.
1615 * NOTE: This can lead to connection read buffers being bigger(!) than
1616 * READBUFFER_LEN bytes, as we add up to READBUFFER_LEN new bytes to a
1617 * buffer possibly being "almost" READBUFFER_LEN bytes already! */
1619 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1620 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1623 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1625 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1632 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1634 "Could not append received data to input buffer (connection %d): %d bytes!",
1636 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1641 /* Update connection statistics */
1642 My_Connections[Idx].bytes_in += len;
1644 /* Handle read buffer */
1645 My_Connections[Idx].bps += Handle_Buffer(Idx);
1647 /* Make sure that there is still a valid client registered */
1648 c = Conn_GetClient(Idx);
1652 /* Update timestamp of last data received if this connection is
1653 * registered as a user, server or service connection. Don't update
1654 * otherwise, so users have at least Conf_PongTimeout seconds time to
1655 * register with the IRC server -- see Check_Connections().
1656 * Update "lastping", too, if time shifted backwards ... */
1657 if (Client_Type(c) == CLIENT_USER
1658 || Client_Type(c) == CLIENT_SERVER
1659 || Client_Type(c) == CLIENT_SERVICE) {
1661 if (My_Connections[Idx].lastdata != t)
1662 My_Connections[Idx].bps = 0;
1664 My_Connections[Idx].lastdata = t;
1665 if (My_Connections[Idx].lastping > t)
1666 My_Connections[Idx].lastping = t;
1669 /* Look at the data in the (read-) buffer of this connection */
1670 if (My_Connections[Idx].bps >= maxbps)
1671 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1672 } /* Read_Request */
1675 * Handle all data in the connection read-buffer.
1677 * Data is processed until no complete command is left in the read buffer,
1678 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1679 * When a fatal error occurs, the connection is shut down.
1681 * @param Idx Index of the connection.
1682 * @returns Number of bytes processed.
1685 Handle_Buffer(CONN_ID Idx)
1688 char *ptr1, *ptr2, *first_eol;
1696 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1699 c = Conn_GetClient(Idx);
1700 starttime = time(NULL);
1704 /* Servers get special command limits that depend on the user count */
1705 switch (Client_Type(c)) {
1707 maxcmd = (int)(Client_UserCount() / 5)
1708 + MAX_COMMANDS_SERVER_MIN;
1709 /* Allow servers to handle even more commands while peering
1710 * to speed up server login and network synchronization. */
1711 if (Conn_LastPing(Idx) == 0)
1714 case CLIENT_SERVICE:
1715 maxcmd = MAX_COMMANDS_SERVICE;
1718 if (Client_HasMode(c, 'F'))
1719 maxcmd = MAX_COMMANDS_SERVICE;
1723 for (i=0; i < maxcmd; i++) {
1725 if (My_Connections[Idx].delaytime > starttime)
1728 /* Unpack compressed data, if compression is in use */
1729 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1730 /* When unzipping fails, Unzip_Buffer() shuts
1731 * down the connection itself */
1732 if (!Unzip_Buffer(Idx))
1737 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1740 /* Make sure that the buffer is NULL terminated */
1741 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1742 Conn_Close(Idx, NULL,
1743 "Can't allocate memory [Handle_Buffer]",
1748 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1749 * "IRC messages are always lines of characters terminated
1750 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1752 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1755 /* Check for non-RFC-compliant request (only CR or LF)?
1756 * Unfortunately, there are quite a few clients out there
1757 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1758 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1759 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1761 /* Check if there is a single CR or LF _before_ the
1762 * correct CR+LF line terminator: */
1763 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1764 if (first_eol < ptr) {
1765 /* Single CR or LF before CR+LF found */
1769 } else if (ptr1 || ptr2) {
1770 /* No CR+LF terminated command found, but single
1771 * CR or LF found ... */
1773 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1775 ptr = ptr1 ? ptr1 : ptr2;
1783 /* Complete (=line terminated) request found, handle it! */
1786 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1788 if (len > (COMMAND_LEN - 1)) {
1789 /* Request must not exceed 512 chars (incl. CR+LF!),
1790 * see RFC 2812. Disconnect Client if this happens. */
1792 "Request too long (connection %d): %d bytes (max. %d expected)!",
1793 Idx, array_bytes(&My_Connections[Idx].rbuf),
1795 Conn_Close(Idx, NULL, "Request too long", true);
1799 len_processed += (unsigned int)len;
1801 /* Request is empty (only '\r\n', '\r' or '\n');
1802 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1803 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1807 /* remember if stream is already compressed */
1808 old_z = My_Connections[Idx].options & CONN_ZIP;
1811 My_Connections[Idx].msg_in++;
1813 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1814 return 0; /* error -> connection has been closed */
1816 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1818 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1819 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1820 /* The last command activated socket compression.
1821 * Data that was read after that needs to be copied
1822 * to the unzip buffer for decompression: */
1824 (&My_Connections[Idx].zip.rbuf,
1825 &My_Connections[Idx].rbuf)) {
1826 Conn_Close(Idx, NULL,
1827 "Can't allocate memory [Handle_Buffer]",
1832 array_trunc(&My_Connections[Idx].rbuf);
1834 ("Moved already received data (%u bytes) to uncompression buffer.",
1835 array_bytes(&My_Connections[Idx].zip.rbuf));
1840 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1841 Idx, i, maxcmd, len_processed,
1842 array_bytes(&My_Connections[Idx].rbuf));
1845 /* If data has been processed but there is still data in the read
1846 * buffer, the command limit triggered. Enforce the penalty time: */
1847 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1848 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1850 return len_processed;
1851 } /* Handle_Buffer */
1854 * Check whether established connections are still alive or not.
1855 * If not, play PING-PONG first; and if that doesn't help either,
1856 * disconnect the respective peer.
1859 Check_Connections(void)
1865 for (i = 0; i < Pool_Size; i++) {
1866 if (My_Connections[i].sock < 0)
1869 c = Conn_GetClient(i);
1870 if (c && ((Client_Type(c) == CLIENT_USER)
1871 || (Client_Type(c) == CLIENT_SERVER)
1872 || (Client_Type(c) == CLIENT_SERVICE))) {
1873 /* connected User, Server or Service */
1874 if (My_Connections[i].lastping >
1875 My_Connections[i].lastdata) {
1876 /* We already sent a ping */
1877 if (My_Connections[i].lastping <
1878 time(NULL) - Conf_PongTimeout) {
1880 snprintf(msg, sizeof(msg),
1881 "Ping timeout: %d seconds",
1883 LogDebug("Connection %d: %s.", i, msg);
1884 Conn_Close(i, NULL, msg, true);
1886 } else if (My_Connections[i].lastdata <
1887 time(NULL) - Conf_PingTimeout) {
1888 /* We need to send a PING ... */
1889 LogDebug("Connection %d: sending PING ...", i);
1891 Conn_WriteStr(i, "PING :%s",
1892 Client_ID(Client_ThisServer()));
1895 /* The connection is not fully established yet, so
1896 * we don't do the PING-PONG game here but instead
1897 * disconnect the client after "a short time" if it's
1898 * still not registered. */
1900 if (My_Connections[i].lastdata <
1901 time(NULL) - Conf_PongTimeout) {
1903 ("Unregistered connection %d timed out ...",
1905 Conn_Close(i, NULL, "Timeout", false);
1909 } /* Check_Connections */
1912 * Check if further server links should be established.
1920 time_now = time(NULL);
1922 /* Check all configured servers */
1923 for (i = 0; i < MAX_SERVERS; i++) {
1924 if (Conf_Server[i].conn_id != NONE)
1925 continue; /* Already establishing or connected */
1926 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1927 continue; /* No host and/or port configured */
1928 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1929 continue; /* Disabled configuration entry */
1930 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1931 continue; /* We have to wait a little bit ... */
1933 /* Is there already a connection in this group? */
1934 if (Conf_Server[i].group > NONE) {
1935 for (n = 0; n < MAX_SERVERS; n++) {
1938 if ((Conf_Server[n].conn_id != NONE) &&
1939 (Conf_Server[n].group == Conf_Server[i].group))
1942 if (n < MAX_SERVERS)
1946 /* Okay, try to connect now */
1948 "Preparing to establish a new server link for \"%s\" ...",
1949 Conf_Server[i].name);
1950 Conf_Server[i].lasttry = time_now;
1951 Conf_Server[i].conn_id = SERVER_WAIT;
1952 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1954 /* Start resolver subprocess ... */
1955 if (!Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1956 cb_Connect_to_Server))
1957 Conf_Server[i].conn_id = NONE;
1959 } /* Check_Servers */
1962 * Establish a new outgoing server connection.
1964 * @param Server Configuration index of the server.
1965 * @param dest Destination IP address to connect to.
1968 New_Server( int Server , ng_ipaddr_t *dest)
1970 /* Establish new server link */
1971 char ip_str[NG_INET_ADDRSTRLEN];
1972 int af_dest, res, new_sock;
1975 assert( Server > NONE );
1977 /* Make sure that the remote server hasn't re-linked to this server
1978 * asynchronously on its own */
1979 if (Conf_Server[Server].conn_id > NONE) {
1981 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
1985 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1986 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1987 Conf_Server[Server].conn_id = NONE;
1991 af_dest = ng_ipaddr_af(dest);
1992 new_sock = socket(af_dest, SOCK_STREAM, 0);
1995 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
1996 Conf_Server[Server].name, Conf_Server[Server].host,
1997 Conf_Server[Server].port, ip_str, new_sock);
2000 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
2001 af_dest, strerror(errno));
2002 Conf_Server[Server].conn_id = NONE;
2006 if (!Init_Socket(new_sock)) {
2007 Conf_Server[Server].conn_id = NONE;
2011 /* is a bind address configured? */
2012 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
2014 /* if yes, bind now. If it fails, warn and let connect() pick a
2016 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
2017 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
2019 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
2020 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
2023 ng_ipaddr_setport(dest, Conf_Server[Server].port);
2024 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
2025 if(( res != 0 ) && ( errno != EINPROGRESS )) {
2026 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2028 Conf_Server[Server].conn_id = NONE;
2032 if (Socket2Index(new_sock) <= NONE) {
2034 Conf_Server[Server].conn_id = NONE;
2038 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2039 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2042 Conf_Server[Server].conn_id = NONE;
2046 assert(My_Connections[new_sock].sock <= 0);
2048 Init_Conn_Struct(new_sock);
2050 ng_ipaddr_tostr_r(dest, ip_str);
2051 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2053 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2055 Conf_Server[Server].conn_id = NONE;
2059 /* Conn_Close() decrements this counter again */
2060 Account_Connection();
2061 Client_SetIntroducer( c, c );
2062 Client_SetToken( c, TOKEN_OUTBOUND );
2064 /* Register connection */
2065 if (!Conf_SetServer(Server, new_sock))
2067 My_Connections[new_sock].sock = new_sock;
2068 My_Connections[new_sock].addr = *dest;
2069 My_Connections[new_sock].client = c;
2070 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2071 sizeof(My_Connections[new_sock].host ));
2074 if (Conf_Server[Server].SSLConnect &&
2075 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2077 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2078 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2080 Init_Conn_Struct(new_sock);
2081 Conf_Server[Server].conn_id = NONE;
2085 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2086 new_sock, My_Connections[new_sock].sock, NumConnections);
2087 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2091 * Initialize connection structure.
2093 * @param Idx Connection index.
2096 Init_Conn_Struct(CONN_ID Idx)
2098 time_t now = time(NULL);
2100 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2101 My_Connections[Idx].sock = -1;
2102 My_Connections[Idx].signon = now;
2103 My_Connections[Idx].lastdata = now;
2104 My_Connections[Idx].lastprivmsg = now;
2105 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2108 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2109 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2111 } /* Init_Conn_Struct */
2114 * Initialize options of a new socket.
2116 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2117 * The socket is automatically closed if a fatal error is encountered.
2119 * @param Sock Socket handle.
2120 * @returns false if socket was closed due to fatal error.
2123 Init_Socket( int Sock )
2127 if (!io_setnonblock(Sock)) {
2128 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2134 /* Don't block this port after socket shutdown */
2136 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2137 (socklen_t)sizeof(value)) != 0) {
2138 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2140 /* ignore this error */
2143 /* Set type of service (TOS) */
2144 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2145 value = IPTOS_LOWDELAY;
2146 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2147 (socklen_t) sizeof(value))) {
2148 LogDebug("Can't set socket option IP_TOS: %s!",
2150 /* ignore this error */
2152 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2160 * Read results of a resolver sub-process and try to initiate a new server
2163 * @param fd File descriptor of the pipe to the sub-process.
2164 * @param events (ignored IO specification)
2167 cb_Connect_to_Server(int fd, UNUSED short events)
2172 /* we can handle at most 3 addresses; but we read up to 4 so we can
2173 * log the 'more than we can handle' condition. First result is tried
2174 * immediately, rest is saved for later if needed. */
2175 ng_ipaddr_t dest_addrs[4];
2177 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2180 for (i=0; i < MAX_SERVERS; i++) {
2181 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2185 if( i >= MAX_SERVERS) {
2186 /* Ops, no matching server found?! */
2188 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2192 /* Read result from pipe */
2193 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2194 Proc_Close(&Conf_Server[i].res_stat);
2196 /* Error resolving hostname: reset server structure */
2197 Conf_Server[i].conn_id = NONE;
2201 assert((len % sizeof(ng_ipaddr_t)) == 0);
2203 LogDebug("Got result from resolver: %u structs (%u bytes).",
2204 len/sizeof(ng_ipaddr_t), len);
2206 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2207 if (len > sizeof(ng_ipaddr_t)) {
2208 /* more than one address for this hostname, remember them
2209 * in case first address is unreachable/not available */
2210 len -= sizeof(ng_ipaddr_t);
2211 if (len > sizeof(Conf_Server[i].dst_addr)) {
2212 len = sizeof(Conf_Server[i].dst_addr);
2214 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2216 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2219 New_Server(i, dest_addrs);
2220 } /* cb_Read_Forward_Lookup */
2223 * Read results of a resolver sub-process from the pipe and update the
2224 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2226 * @param r_fd File descriptor of the pipe to the sub-process.
2227 * @param events (ignored IO specification)
2230 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2237 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2240 char readbuf[HOST_LEN + 1];
2243 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2244 i = Conn_GetFromProc(r_fd);
2246 /* Ops, none found? Probably the connection has already
2247 * been closed!? We'll ignore that ... */
2249 LogDebug("Resolver: Got callback for unknown connection!?");
2253 /* Read result from pipe */
2254 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2255 Proc_Close(&My_Connections[i].proc_stat);
2259 readbuf[len] = '\0';
2260 identptr = strchr(readbuf, '\n');
2261 assert(identptr != NULL);
2263 Log( LOG_CRIT, "Resolver: Got malformed result!");
2268 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2269 /* Okay, we got a complete result: this is a host name for outgoing
2270 * connections and a host name and IDENT user name (if enabled) for
2271 * incoming connections.*/
2272 assert ( My_Connections[i].sock >= 0 );
2273 /* Incoming connection. Search client ... */
2274 c = Conn_GetClient( i );
2275 assert( c != NULL );
2277 /* Only update client information of unregistered clients.
2278 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2279 * the resolver results, so we don't have to worry to override settings
2280 * from these commands here. */
2281 if(Client_Type(c) == CLIENT_UNKNOWN) {
2282 strlcpy(My_Connections[i].host, readbuf,
2283 sizeof(My_Connections[i].host));
2284 Client_SetHostname(c, readbuf);
2285 if (Conf_NoticeBeforeRegistration)
2286 (void)Conn_WriteStr(i,
2287 "NOTICE * :*** Found your hostname: %s",
2288 My_Connections[i].host);
2294 if ((*ptr < '0' || *ptr > '9') &&
2295 (*ptr < 'A' || *ptr > 'Z') &&
2296 (*ptr < 'a' || *ptr > 'z'))
2301 /* Erroneous IDENT reply */
2303 "Got invalid IDENT reply for connection %d! Ignored.",
2307 "IDENT lookup for connection %d: \"%s\".",
2309 Client_SetUser(c, identptr, true);
2311 if (Conf_NoticeBeforeRegistration) {
2312 (void)Conn_WriteStr(i,
2313 "NOTICE * :*** Got %sident response%s%s",
2314 *ptr ? "invalid " : "",
2316 *ptr ? "" : identptr);
2318 } else if(Conf_Ident) {
2319 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2320 if (Conf_NoticeBeforeRegistration)
2321 (void)Conn_WriteStr(i,
2322 "NOTICE * :*** No ident response");
2326 if (Conf_NoticeBeforeRegistration) {
2327 /* Send buffered data to the client, but break on
2328 * errors because Handle_Write() would have closed
2329 * the connection again in this case! */
2330 if (!Handle_Write(i))
2334 Class_HandleServerBans(c);
2338 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2340 } /* cb_Read_Resolver_Result */
2343 * Write a "simple" (error) message to a socket.
2345 * The message is sent without using the connection write buffers, without
2346 * compression/encryption, and even without any error reporting. It is
2347 * designed for error messages of e.g. New_Connection().
2349 * @param Sock Socket handle.
2350 * @param Msg Message string to send.
2353 Simple_Message(int Sock, const char *Msg)
2355 char buf[COMMAND_LEN];
2358 assert(Sock > NONE);
2359 assert(Msg != NULL);
2361 strlcpy(buf, Msg, sizeof buf - 2);
2362 len = strlcat(buf, "\r\n", sizeof buf);
2363 if (write(Sock, buf, len) < 0) {
2364 /* Because this function most probably got called to log
2365 * an error message, any write error is ignored here to
2366 * avoid an endless loop. But casting the result of write()
2367 * to "void" doesn't satisfy the GNU C code attribute
2368 * "warn_unused_result" which is used by some versions of
2369 * glibc (e.g. 2.11.1), therefore this silly error
2370 * "handling" code here :-( */
2373 } /* Simple_Error */
2376 * Get CLIENT structure that belongs to a local connection identified by its
2377 * index number. Each connection belongs to a client by definition, so it is
2378 * not required that the caller checks for NULL return values.
2380 * @param Idx Connection index number.
2381 * @returns Pointer to CLIENT structure.
2384 Conn_GetClient( CONN_ID Idx )
2389 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2391 return c ? c->client : NULL;
2395 * Get PROC_STAT sub-process structure of a connection.
2397 * @param Idx Connection index number.
2398 * @returns PROC_STAT structure.
2401 Conn_GetProcStat(CONN_ID Idx)
2406 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2408 return &c->proc_stat;
2409 } /* Conn_GetProcStat */
2412 * Get CONN_ID from file descriptor associated to a subprocess structure.
2414 * @param fd File descriptor.
2415 * @returns CONN_ID or NONE (-1).
2418 Conn_GetFromProc(int fd)
2423 for (i = 0; i < Pool_Size; i++) {
2424 if ((My_Connections[i].sock != NONE)
2425 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2429 } /* Conn_GetFromProc */
2432 * Throttle a connection because of excessive usage.
2434 * @param Reason The reason, see THROTTLE_xxx constants.
2435 * @param Idx The connection index.
2436 * @param Client The client of this connection.
2437 * @param Value The time to delay this connection.
2440 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2444 assert(Client != NULL);
2446 /* Never throttle servers or services, only interrupt processing */
2447 if (Client_Type(Client) == CLIENT_SERVER
2448 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2449 || Client_Type(Client) == CLIENT_SERVICE)
2452 /* Don't throttle clients with user mode 'F' set */
2453 if (Client_HasMode(Client, 'F'))
2456 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2458 Conn_SetPenalty(Idx, 1);
2464 Conn_GetAuthPing(CONN_ID Idx)
2466 assert (Idx != NONE);
2467 return My_Connections[Idx].auth_ping;
2468 } /* Conn_GetAuthPing */
2471 Conn_SetAuthPing(CONN_ID Idx, long ID)
2473 assert (Idx != NONE);
2474 My_Connections[Idx].auth_ping = ID;
2475 } /* Conn_SetAuthPing */
2477 #endif /* STRICT_RFC */
2482 * IO callback for new SSL-enabled client and server connections.
2484 * @param sock Socket descriptor.
2485 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2488 cb_clientserver_ssl(int sock, UNUSED short what)
2490 CONN_ID idx = Socket2Index(sock);
2497 switch (ConnSSL_Accept(&My_Connections[idx])) {
2501 return; /* EAGAIN: callback will be invoked again by IO layer */
2504 "SSL accept error, closing socket", "SSL accept error",
2509 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2513 * IO callback for listening SSL sockets: handle new connections. This callback
2514 * gets called when a new SSL-enabled connection should be accepted.
2516 * @param sock Socket descriptor.
2517 * @param irrelevant (ignored IO specification)
2520 cb_listen_ssl(int sock, short irrelevant)
2525 fd = New_Connection(sock, true);
2528 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2532 * IO callback for new outgoing SSL-enabled server connections.
2534 * @param sock Socket descriptor.
2535 * @param unused (ignored IO specification)
2538 cb_connserver_login_ssl(int sock, short unused)
2540 CONN_ID idx = Socket2Index(sock);
2549 switch (ConnSSL_Connect( &My_Connections[idx])) {
2551 case 0: LogDebug("ConnSSL_Connect: not ready");
2554 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2555 Conn_Close(idx, "Can't connect", NULL, false);
2559 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2560 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2567 * Check if SSL library needs to read SSL-protocol related data.
2569 * SSL/TLS connections require extra treatment:
2570 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2571 * need to take care of that first, before checking read/write buffers.
2572 * For instance, while we might have data in our write buffer, the
2573 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2574 * writes to succeed.
2576 * If this function returns true, such a condition is met and we have
2577 * to reverse the condition (check for read even if we've data to write,
2578 * do not check for read but writeability even if write-buffer is empty).
2580 * @param c Connection to check.
2581 * @returns true if SSL-library has to read protocol data.
2584 SSL_WantRead(const CONNECTION *c)
2586 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2587 io_event_add(c->sock, IO_WANTREAD);
2594 * Check if SSL library needs to write SSL-protocol related data.
2596 * Please see description of SSL_WantRead() for full description!
2598 * @param c Connection to check.
2599 * @returns true if SSL-library has to write protocol data.
2602 SSL_WantWrite(const CONNECTION *c)
2604 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2605 io_event_add(c->sock, IO_WANTWRITE);
2612 * Get information about used SSL cipher.
2614 * @param Idx Connection index number.
2615 * @param buf Buffer for returned information text.
2616 * @param len Size of return buffer "buf".
2617 * @returns true on success, false otherwise.
2620 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2624 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2625 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2629 * Check if a connection is SSL-enabled or not.
2631 * @param Idx Connection index number.
2632 * @return true if connection is SSL-enabled, false otherwise.
2635 Conn_UsesSSL(CONN_ID Idx)
2639 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2640 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2644 Conn_GetCertFp(CONN_ID Idx)
2648 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2649 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2653 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2657 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2658 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2661 #else /* SSL_SUPPORT */
2664 Conn_UsesSSL(UNUSED CONN_ID Idx)
2670 Conn_GetCertFp(UNUSED CONN_ID Idx)
2676 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2681 #endif /* SSL_SUPPORT */
2686 * Dump internal state of the "connection module".
2689 Conn_DebugDump(void)
2693 Log(LOG_DEBUG, "Connection status:");
2694 for (i = 0; i < Pool_Size; i++) {
2695 if (My_Connections[i].sock == NONE)
2698 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2699 My_Connections[i].sock, My_Connections[i].host,
2700 My_Connections[i].lastdata, My_Connections[i].lastping,
2701 My_Connections[i].delaytime, My_Connections[i].flag,
2702 My_Connections[i].options, My_Connections[i].bps,
2703 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2705 } /* Conn_DumpClients */