2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2024 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: */
483 if (!Conf_SSLOptions.KeyFile &&
484 array_length(&Conf_SSLOptions.ListenPorts, sizeof (UINT16))) {
486 "Ignoring SSL-enabled listening ports: No key file set!");
487 array_free(&Conf_SSLOptions.ListenPorts);
491 /* can't use Conf_ListenAddress directly, see below */
492 copy = strdup(Conf_ListenAddress);
494 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress,
498 listen_addr = strtok(copy, ",");
500 while (listen_addr) {
501 ngt_TrimStr(listen_addr);
503 created += Init_Listeners(&Conf_ListenPorts,
504 listen_addr, cb_listen);
506 created += Init_Listeners(&Conf_SSLOptions.ListenPorts,
507 listen_addr, cb_listen_ssl);
511 listen_addr = strtok(NULL, ",");
514 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
515 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
516 * Instead, free() takes place in conf.c, before the config file
517 * is being parsed. */
521 } /* Conn_InitListeners */
524 * Shut down all listening sockets.
527 Conn_ExitListeners( void )
529 /* Close down all listening sockets */
533 /* Get number of listening sockets to shut down. There can be none
534 * if ngIRCd has been "socket activated" by systemd. */
535 arraylen = array_length(&My_Listeners, sizeof (int));
540 "Shutting down all listening sockets (%d total) ...", arraylen);
541 fd = array_start(&My_Listeners);
546 LogDebug("Listening socket %d closed.", *fd );
549 array_free(&My_Listeners);
550 } /* Conn_ExitListeners */
553 * Bind a socket to a specific (source) address.
555 * @param addr Address structure.
556 * @param listen_addrstr Source address as string.
557 * @param Port Port number.
558 * @returns true on success, false otherwise.
561 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
565 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
567 assert(listen_addrstr);
569 "Can't listen on [%s]:%u: Failed to parse IP address!",
570 listen_addrstr, Port);
576 * Set a socket to "IPv6 only". If the given socket doesn't belong to the
577 * AF_INET6 family, or the operating system doesn't support this functionality,
578 * this function returns silently.
580 * @param af Address family of the socket.
581 * @param sock Socket handle.
584 set_v6_only(int af, int sock)
586 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
592 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
593 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
601 * Initialize new listening port.
603 * @param listen_addr Local address to bind the socket to (can be 0.0.0.0).
604 * @param Port Port number on which the new socket should be listening.
605 * @returns file descriptor of the socket or -1 on failure.
608 NewListener(const char *listen_addr, UINT16 Port)
610 /* Create new listening socket on specified port */
614 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
617 af = ng_ipaddr_af(&addr);
618 sock = socket(af, SOCK_STREAM, 0);
620 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af,
625 set_v6_only(af, sock);
627 if (!Init_Socket(sock))
630 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
631 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s!",
632 ng_ipaddr_tostr(&addr), Port, strerror(errno));
637 if (listen(sock, 10) != 0) {
638 Log(LOG_CRIT, "Can't listen on socket: %s!", strerror(errno));
643 /* keep fd in list so we can close it when ngircd restarts/shuts down */
644 if (!array_catb(&My_Listeners, (char *)&sock, sizeof(int))) {
645 Log(LOG_CRIT, "Can't add socket to My_Listeners array: %s!",
651 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
652 ng_ipaddr_tostr(&addr), Port, sock);
657 * "Main Loop": Loop until shutdown or restart is signalled.
659 * This function loops until a shutdown or restart of ngIRCd is signalled and
660 * calls io_dispatch() to check for readable and writable sockets every second.
661 * It checks for status changes on pending connections (e. g. when a hostname
662 * has been resolved), checks for "penalties" and timeouts, and handles the
672 bool command_available;
674 Log(LOG_NOTICE, "Server \"%s\" (on \"%s\") ready.",
675 Client_ID(Client_ThisServer()), Client_Hostname(Client_ThisServer()));
677 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
679 command_available = false;
681 /* Check configured servers and established links */
685 /* Expire outdated class/list items */
688 /* Look for non-empty read buffers ... */
689 for (i = 0; i < Pool_Size; i++) {
690 if ((My_Connections[i].sock > NONE)
691 && (array_bytes(&My_Connections[i].rbuf) > 0)) {
692 /* ... and try to handle the received data */
697 /* Look for non-empty write buffers ... */
698 for (i = 0; i < Pool_Size; i++) {
699 if (My_Connections[i].sock <= NONE)
702 wdatalen = array_bytes(&My_Connections[i].wbuf);
705 array_bytes(&My_Connections[i].zip.wbuf) > 0)
711 if (SSL_WantRead(&My_Connections[i]))
714 io_event_add(My_Connections[i].sock,
719 /* Check from which sockets we possibly could read ... */
720 for (i = 0; i < Pool_Size; i++) {
721 if (My_Connections[i].sock <= NONE)
724 if (SSL_WantWrite(&My_Connections[i]))
725 /* TLS/SSL layer needs to write data; deal
726 * with this first! */
729 if (Proc_InProgress(&My_Connections[i].proc_stat)) {
730 /* Wait for completion of forked subprocess
731 * and ignore the socket in the meantime ... */
732 io_event_del(My_Connections[i].sock,
737 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
738 /* Wait for completion of connect() ... */
741 if (My_Connections[i].delaytime > t) {
742 /* There is a "penalty time" set: ignore socket! */
743 io_event_del(My_Connections[i].sock,
748 if (array_bytes(&My_Connections[i].rbuf) >= COMMAND_LEN) {
749 /* There is still more data in the read buffer
750 * than a single valid command can get long:
751 * so either there is a complete command, or
752 * invalid data. Therefore don't try to read in
753 * even more data from the network but wait for
754 * this command(s) to be handled first! */
755 io_event_del(My_Connections[i].sock,
757 command_available = true;
761 io_event_add(My_Connections[i].sock, IO_WANTREAD);
764 /* Don't wait for data when there is still at least one command
765 * available in a read buffer which can be handled immediately;
766 * set the timeout for reading from the network to 1 second
767 * otherwise, which is the granularity with witch we handle
768 * "penalty times" for example.
769 * Note: tv_sec/usec are undefined(!) after io_dispatch()
770 * returns, so we have to set it before each call to it! */
772 tv.tv_sec = command_available ? 0 : 1;
774 /* Wait for activity ... */
775 i = io_dispatch(&tv);
776 if (i == -1 && errno != EINTR) {
777 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
779 Log(LOG_ALERT, "%s exiting due to fatal errors!",
784 /* Should ngIRCd timeout when idle? */
785 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
786 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
787 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
789 Conf_IdleTimeout == 1 ? "" : "s");
790 NGIRCd_SignalQuit = true;
794 if (NGIRCd_SignalQuit)
795 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
796 else if (NGIRCd_SignalRestart)
797 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
801 * Write a text string into the socket of a connection.
803 * This function automatically appends CR+LF to the string and validates that
804 * the result is a valid IRC message (oversized messages are shortened, for
805 * example). Then it calls the Conn_Write() function to do the actual sending.
807 * @param Idx Index of the connection.
808 * @param Format Format string, see printf().
809 * @returns true on success, false otherwise.
813 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
816 Conn_WriteStr(Idx, Format, va_alist)
822 char buffer[COMMAND_LEN];
831 assert( Idx > NONE );
832 assert( Format != NULL );
835 va_start( ap, Format );
839 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
840 if (r >= COMMAND_LEN - 2 || r == -1) {
842 * The string that should be written to the socket is longer
843 * than the allowed size of COMMAND_LEN bytes (including both
844 * the CR and LF characters). This can be caused by the
845 * IRC_WriteXXX() functions when the prefix of this server had
846 * to be added to an already "quite long" command line which
847 * has been received from a regular IRC client, for example.
849 * We are not allowed to send such "oversized" messages to
850 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
851 * ("these messages SHALL NOT exceed 512 characters in length,
852 * counting all characters including the trailing CR-LF").
854 * So we have a big problem here: we should send more bytes
855 * to the network than we are allowed to and we don't know
856 * the originator (any more). The "old" behavior of blaming
857 * the receiver ("next hop") is a bad idea (it could be just
858 * an other server only routing the message!), so the only
859 * option left is to shorten the string and to hope that the
860 * result is still somewhat useful ...
863 * C99 states that vsnprintf() "returns the number of characters
864 * that would have been printed if the n were unlimited"; but
865 * according to the Linux manual page "glibc until 2.0.6 would
866 * return -1 when the output was truncated" -- so we have to
867 * handle both cases ...
871 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
876 ptr = strchr(buffer + 1, ':');
879 message = Conn_EncodingTo(Idx, ptr);
881 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
887 LogDebug("-> connection %d: '%s'.", Idx, buffer);
890 len = strlcat( buffer, "\r\n", sizeof( buffer ));
891 ok = Conn_Write(Idx, buffer, len);
892 My_Connections[Idx].msg_out++;
896 } /* Conn_WriteStr */
899 Conn_Password( CONN_ID Idx )
901 assert( Idx > NONE );
902 if (My_Connections[Idx].pwd == NULL)
905 return My_Connections[Idx].pwd;
906 } /* Conn_Password */
909 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
911 assert( Idx > NONE );
913 if (My_Connections[Idx].pwd)
914 free(My_Connections[Idx].pwd);
916 My_Connections[Idx].pwd = strdup(Pwd);
917 if (My_Connections[Idx].pwd == NULL) {
918 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
921 } /* Conn_SetPassword */
924 * Append Data to the outbound write buffer of a connection.
926 * @param Idx Index of the connection.
927 * @param Data pointer to the data.
928 * @param Len length of Data.
929 * @returns true on success, false otherwise.
932 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
935 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
936 assert( Idx > NONE );
937 assert( Data != NULL );
940 /* Is the socket still open? A previous call to Conn_Write()
941 * may have closed the connection due to a fatal error.
942 * In this case it is sufficient to return an error, as well. */
943 if (My_Connections[Idx].sock <= NONE) {
944 LogDebug("Skipped write on closed socket (connection %d).", Idx);
948 /* Make sure that there still exists a CLIENT structure associated
949 * with this connection and check if this is a server or not: */
950 c = Conn_GetClient(Idx);
952 /* Servers do get special write buffer limits, so they can
953 * generate all the messages that are required while peering. */
954 if (Client_Type(c) == CLIENT_SERVER)
955 writebuf_limit = WRITEBUFFER_SLINK_LEN;
957 LogDebug("Write on socket without client (connection %d)!?", Idx);
960 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
962 * Zip_Buffer() does all the dirty work for us: it flushes
963 * the (pre-)compression buffers if required and handles
964 * all error conditions. */
965 if (!Zip_Buffer(Idx, Data, Len))
971 /* Uncompressed link:
972 * Check if outbound buffer has enough space for the data. */
973 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
974 WRITEBUFFER_FLUSH_LEN) {
975 /* Buffer is full, flush it. Handle_Write deals with
976 * low-level errors, if any. */
977 if (!Handle_Write(Idx))
981 /* When the write buffer is still too big after flushing it,
982 * the connection will be killed. */
983 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
986 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
987 Idx, writebuf_limit, Len,
988 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
989 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
993 /* Copy data to write buffer */
994 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
997 My_Connections[Idx].bytes_out += Len;
1000 /* Adjust global write counter */
1007 * Shut down a connection.
1009 * @param Idx Connection index.
1010 * @param LogMsg Message to write to the log or NULL. If no LogMsg
1011 * is given, the FwdMsg is logged.
1012 * @param FwdMsg Message to forward to remote servers.
1013 * @param InformClient If true, inform the client on the connection which is
1014 * to be shut down of the reason (FwdMsg) and send
1015 * connection statistics before disconnecting it.
1018 Conn_Close(CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient)
1020 /* Close connection. Open pipes of asynchronous resolver
1021 * sub-processes are closed down. */
1027 double in_z_k, out_z_k;
1031 assert( Idx > NONE );
1033 /* Is this link already shutting down? */
1034 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1035 /* Conn_Close() has been called recursively for this link;
1036 * probable reason: Handle_Write() failed -- see below. */
1037 LogDebug("Recursive request to close connection %d!", Idx );
1041 assert( My_Connections[Idx].sock > NONE );
1043 /* Mark link as "closing" */
1044 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1046 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1047 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1048 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1050 /* Search client, if any */
1051 c = Conn_GetClient( Idx );
1053 /* Should the client be informed? */
1056 /* Send statistics to client if registered as user: */
1057 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1059 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1060 Client_ID(Client_ThisServer()), Client_ID(c),
1062 (double)My_Connections[Idx].bytes_in / 1024,
1063 (double)My_Connections[Idx].bytes_out / 1024);
1066 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1068 Conn_WriteStr(Idx, "ERROR :Closing connection: %s[%s@%s] (%s)",
1069 Client_ID(c), Client_User(c), Client_Hostname(c),
1070 FwdMsg ? FwdMsg : "\"\"");
1072 Conn_WriteStr(Idx, "ERROR :Closing connection");
1075 /* Try to write out the write buffer. Note: Handle_Write() eventually
1076 * removes the CLIENT structure associated with this connection if an
1077 * error occurs! So we have to re-check if there is still an valid
1078 * CLIENT structure after calling Handle_Write() ...*/
1079 (void)Handle_Write( Idx );
1081 /* Search client, if any (re-check!) */
1082 c = Conn_GetClient( Idx );
1084 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1085 LogDebug("SSL connection %d shutting down ...", Idx);
1086 ConnSSL_Free(&My_Connections[Idx]);
1089 /* Shut down socket */
1090 if (! io_close(My_Connections[Idx].sock)) {
1091 /* Oops, we can't close the socket!? This is ... ugly! */
1093 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1094 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1095 port, strerror(errno));
1098 /* Mark socket as invalid: */
1099 My_Connections[Idx].sock = NONE;
1101 /* If there is still a client, unregister it now */
1103 Client_Destroy(c, LogMsg, FwdMsg, true);
1105 /* Calculate statistics and log information */
1106 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1107 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1109 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1110 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1111 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1112 /* Make sure that no division by zero can occur during
1113 * the calculation of in_p and out_p: in_z_k and out_z_k
1114 * are non-zero, that's guaranteed by the protocol until
1115 * compression can be enabled. */
1120 in_p = (int)(( in_k * 100 ) / in_z_k );
1121 out_p = (int)(( out_k * 100 ) / out_z_k );
1123 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1124 Idx, My_Connections[Idx].host, port,
1125 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1131 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1132 Idx, My_Connections[Idx].host, port,
1136 /* Servers: Modify time of next connect attempt? */
1137 Conf_UnsetServer( Idx );
1140 /* Clean up zlib, if link was compressed */
1141 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1142 inflateEnd( &My_Connections[Idx].zip.in );
1143 deflateEnd( &My_Connections[Idx].zip.out );
1144 array_free(&My_Connections[Idx].zip.rbuf);
1145 array_free(&My_Connections[Idx].zip.wbuf);
1149 array_free(&My_Connections[Idx].rbuf);
1150 array_free(&My_Connections[Idx].wbuf);
1151 if (My_Connections[Idx].pwd != NULL)
1152 free(My_Connections[Idx].pwd);
1154 /* Clean up connection structure (=free it) */
1155 Init_Conn_Struct( Idx );
1157 assert(NumConnections > 0);
1160 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1161 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1163 idle_t = NumConnections > 0 ? 0 : time(NULL);
1167 * Get current number of connections.
1169 * @returns Number of current connections.
1174 return NumConnections;
1178 * Get number of maximum simultaneous connections.
1180 * @returns Number of maximum simultaneous connections.
1185 return NumConnectionsMax;
1186 } /* Conn_CountMax */
1189 * Get number of connections accepted since the daemon started.
1191 * @returns Number of connections accepted.
1194 Conn_CountAccepted(void)
1196 return NumConnectionsAccepted;
1197 } /* Conn_CountAccepted */
1200 * Synchronize established connections and configured server structures
1201 * after a configuration update and store the correct connection IDs, if any.
1204 Conn_SyncServerStruct(void)
1210 for (i = 0; i < Pool_Size; i++) {
1211 if (My_Connections[i].sock == NONE)
1215 client = Conn_GetClient(i);
1216 if (!client || Client_Type(client) != CLIENT_SERVER)
1219 for (c = 0; c < MAX_SERVERS; c++) {
1220 /* Configured server? */
1221 if (!Conf_Server[c].host[0])
1224 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1225 Conf_Server[c].conn_id = i;
1228 } /* SyncServerStruct */
1231 * Get IP address string of a connection.
1233 * @param Idx Connection index.
1234 * @return Pointer to a global buffer containing the IP address as string.
1237 Conn_GetIPAInfo(CONN_ID Idx)
1240 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1244 * Send out data of write buffer; connect new sockets.
1246 * @param Idx Connection index.
1247 * @returns true on success, false otherwise.
1250 Handle_Write( CONN_ID Idx )
1255 assert( Idx > NONE );
1256 if ( My_Connections[Idx].sock < 0 ) {
1257 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1260 assert( My_Connections[Idx].sock > NONE );
1262 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1265 if (wdatalen == 0) {
1266 /* Write buffer is empty, so we try to flush the compression
1267 * buffer and get some data to work with from there :-) */
1268 if (!Zip_Flush(Idx))
1271 /* Now the write buffer most probably has changed: */
1272 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1276 if (wdatalen == 0) {
1277 /* Still no data, fine. */
1278 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1284 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1289 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1290 len = ConnSSL_Write(&My_Connections[Idx],
1291 array_start(&My_Connections[Idx].wbuf),
1296 len = write(My_Connections[Idx].sock,
1297 array_start(&My_Connections[Idx].wbuf), wdatalen );
1300 if (errno == EAGAIN || errno == EINTR)
1303 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING)) {
1305 "Write error on connection %d (socket %d): %s!",
1306 Idx, My_Connections[Idx].sock, strerror(errno));
1307 Conn_Close(Idx, "Write error", NULL, false);
1309 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1310 Idx, My_Connections[Idx].sock, strerror(errno));
1315 /* move any data not yet written to beginning */
1316 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1319 } /* Handle_Write */
1322 * Count established connections to a specific IP address.
1324 * @returns Number of established connections.
1327 Count_Connections(ng_ipaddr_t *a)
1332 for (i = 0; i < Pool_Size; i++) {
1333 if (My_Connections[i].sock <= NONE)
1335 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1339 } /* Count_Connections */
1342 * Initialize new client connection on a listening socket.
1344 * @param Sock Listening socket descriptor.
1345 * @param IsSSL true if this socket expects SSL-encrypted data.
1346 * @returns Accepted socket descriptor or -1 on error.
1349 New_Connection(int Sock, UNUSED bool IsSSL)
1352 struct request_info req;
1354 ng_ipaddr_t new_addr;
1355 char ip_str[NG_INET_ADDRSTRLEN];
1356 int new_sock, new_sock_len;
1360 assert(Sock > NONE);
1362 LogDebug("Accepting new connection on socket %d ...", Sock);
1364 new_sock_len = (int)sizeof(new_addr);
1365 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1366 (socklen_t *)&new_sock_len);
1368 Log(LOG_CRIT, "Can't accept connection on socket %d: %s!",
1369 Sock, strerror(errno));
1372 NumConnectionsAccepted++;
1374 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1375 Log(LOG_CRIT, "Can't convert peer IP address of socket %d!", new_sock);
1376 Simple_Message(new_sock, "ERROR :Internal Server Error");
1382 /* Validate socket using TCP Wrappers */
1383 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1384 RQ_CLIENT_SIN, &new_addr, NULL);
1386 if (!hosts_access(&req)) {
1388 "Refused connection from %s on socket %d (by TCP Wrappers)!",
1390 Simple_Message(new_sock, "ERROR :Connection refused");
1396 if (!Init_Socket(new_sock))
1399 /* Check global connection limit */
1400 if ((Conf_MaxConnections > 0) &&
1401 (NumConnections >= (size_t) Conf_MaxConnections)) {
1402 Log(LOG_ALERT, "Can't accept new connection on socket %d: Limit (%d) reached!",
1403 Sock, Conf_MaxConnections);
1404 Simple_Message(new_sock, "ERROR :Connection limit reached");
1409 /* Check IP-based connection limit */
1410 cnt = Count_Connections(&new_addr);
1411 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1412 /* Access denied, too many connections from this IP address! */
1414 "Refused connection from %s on socket %d: too may connections (%ld) from this IP address!",
1416 Simple_Message(new_sock,
1417 "ERROR :Connection refused, too many connections from your IP address");
1422 if (Socket2Index(new_sock) <= NONE) {
1423 Simple_Message(new_sock, "ERROR: Internal error");
1428 /* register callback */
1429 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1431 "Can't accept connection: io_event_create failed!");
1432 Simple_Message(new_sock, "ERROR :Internal error");
1437 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1440 "Can't accept connection: can't create client structure!");
1441 Simple_Message(new_sock, "ERROR :Internal error");
1446 Init_Conn_Struct(new_sock);
1447 My_Connections[new_sock].sock = new_sock;
1448 My_Connections[new_sock].addr = new_addr;
1449 My_Connections[new_sock].client = c;
1451 /* Set initial hostname to IP address. This becomes overwritten when
1452 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1453 if (ng_ipaddr_af(&new_addr) != AF_INET)
1454 snprintf(My_Connections[new_sock].host,
1455 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1457 strlcpy(My_Connections[new_sock].host, ip_str,
1458 sizeof(My_Connections[new_sock].host));
1460 Client_SetHostname(c, My_Connections[new_sock].host);
1462 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1463 new_sock, My_Connections[new_sock].host,
1464 ng_ipaddr_getport(&new_addr), Sock);
1465 Account_Connection();
1468 /* Delay connection initialization until SSL handshake is finished */
1471 Conn_StartLogin(new_sock);
1474 } /* New_Connection */
1477 * Finish connection initialization, start resolver subprocess.
1479 * @param Idx Connection index.
1482 Conn_StartLogin(CONN_ID Idx)
1484 int ident_sock = -1;
1489 /* Should we make an IDENT request? */
1491 ident_sock = My_Connections[Idx].sock;
1494 if (Conf_NoticeBeforeRegistration) {
1495 /* Send "NOTICE *" messages to the client */
1499 (void)Conn_WriteStr(Idx,
1500 "NOTICE * :*** Looking up your hostname and checking ident");
1502 (void)Conn_WriteStr(Idx,
1503 "NOTICE * :*** Checking ident");
1507 (void)Conn_WriteStr(Idx,
1508 "NOTICE * :*** Looking up your hostname");
1510 (void)Conn_WriteStr(Idx,
1511 "NOTICE * :*** Processing your connection");
1512 /* Send buffered data to the client, but break on errors
1513 * because Handle_Write() would have closed the connection
1514 * again in this case! */
1515 if (!Handle_Write(Idx))
1519 Resolve_Addr_Ident(&My_Connections[Idx].proc_stat,
1520 &My_Connections[Idx].addr,
1521 ident_sock, cb_Read_Resolver_Result);
1525 * Update global connection counters.
1528 Account_Connection(void)
1532 if (NumConnections > NumConnectionsMax)
1533 NumConnectionsMax = NumConnections;
1534 LogDebug("Total number of connections now %lu (max %lu).",
1535 NumConnections, NumConnectionsMax);
1536 } /* Account_Connection */
1539 * Translate socket handle into connection index (for historical reasons, it is
1540 * a 1:1 mapping today) and enlarge the "connection pool" accordingly.
1542 * @param Sock Socket handle.
1543 * @returns Connection index or NONE when the pool is too small.
1546 Socket2Index( int Sock )
1549 assert(Pool_Size >= 0);
1551 if (Sock < Pool_Size)
1554 /* Try to allocate more memory ... */
1555 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Sock)) {
1557 "Can't allocate memory to enlarge connection pool!");
1560 LogDebug("Enlarged connection pool for %ld sockets (%ld items, %ld bytes)",
1561 Sock, array_length(&My_ConnArray, sizeof(CONNECTION)),
1562 array_bytes(&My_ConnArray));
1564 /* Adjust pointer to new block, update size and initialize new items. */
1565 My_Connections = array_start(&My_ConnArray);
1566 while (Pool_Size <= Sock)
1567 Init_Conn_Struct(Pool_Size++);
1573 * Read data from the network to the read buffer. If an error occurs,
1574 * the socket of this connection will be shut down.
1576 * @param Idx Connection index.
1579 Read_Request(CONN_ID Idx)
1582 static const unsigned int maxbps = COMMAND_LEN / 2;
1583 char readbuf[READBUFFER_LEN];
1588 assert(My_Connections[Idx].sock > NONE);
1590 /* Check if the read buffer is "full". Basically this shouldn't happen
1591 * here, because as long as there possibly are commands in the read
1592 * buffer (buffer usage > COMMAND_LEN), the socket shouldn't be
1593 * scheduled for reading in Conn_Handler() at all ... */
1595 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1596 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1598 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1602 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1603 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1604 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1608 /* Now read new data from the network, up to READBUFFER_LEN bytes ... */
1610 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1611 len = ConnSSL_Read(&My_Connections[Idx], readbuf, sizeof(readbuf));
1614 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1617 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1618 My_Connections[Idx].host,
1619 ng_ipaddr_getport(&My_Connections[Idx].addr), Idx);
1620 Conn_Close(Idx, NULL, "Client closed connection", false);
1625 if (errno == EAGAIN)
1628 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1629 Idx, My_Connections[Idx].sock, strerror(errno));
1630 Conn_Close(Idx, "Read error", "Client closed connection",
1635 /* Now append the newly received data to the connection buffer.
1636 * NOTE: This can lead to connection read buffers being bigger(!) than
1637 * READBUFFER_LEN bytes, as we add up to READBUFFER_LEN new bytes to a
1638 * buffer possibly being "almost" READBUFFER_LEN bytes already! */
1640 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1641 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1644 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1646 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1653 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1655 "Could not append received data to input buffer (connection %d): %d bytes!",
1657 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1662 /* Update connection statistics */
1663 My_Connections[Idx].bytes_in += len;
1665 /* Handle read buffer */
1666 My_Connections[Idx].bps += Handle_Buffer(Idx);
1668 /* Make sure that there is still a valid client registered */
1669 c = Conn_GetClient(Idx);
1673 /* Update timestamp of last data received if this connection is
1674 * registered as a user, server or service connection. Don't update
1675 * otherwise, so users have at least Conf_PongTimeout seconds time to
1676 * register with the IRC server -- see Check_Connections().
1677 * Update "lastping", too, if time shifted backwards ... */
1678 if (Client_Type(c) == CLIENT_USER
1679 || Client_Type(c) == CLIENT_SERVER
1680 || Client_Type(c) == CLIENT_SERVICE) {
1682 if (My_Connections[Idx].lastdata != t)
1683 My_Connections[Idx].bps = 0;
1685 My_Connections[Idx].lastdata = t;
1686 if (My_Connections[Idx].lastping > t)
1687 My_Connections[Idx].lastping = t;
1690 /* Look at the data in the (read-) buffer of this connection */
1691 if (My_Connections[Idx].bps >= maxbps)
1692 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1693 } /* Read_Request */
1696 * Handle all data in the connection read-buffer.
1698 * Data is processed until no complete command is left in the read buffer,
1699 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1700 * When a fatal error occurs, the connection is shut down.
1702 * @param Idx Index of the connection.
1703 * @returns Number of bytes processed.
1706 Handle_Buffer(CONN_ID Idx)
1709 char *ptr1, *ptr2, *first_eol;
1717 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1720 c = Conn_GetClient(Idx);
1721 starttime = time(NULL);
1725 /* Servers get special command limits that depend on the user count */
1726 switch (Client_Type(c)) {
1728 maxcmd = (int)(Client_UserCount() / 5)
1729 + MAX_COMMANDS_SERVER_MIN;
1730 /* Allow servers to handle even more commands while peering
1731 * to speed up server login and network synchronization. */
1732 if (Conn_LastPing(Idx) == 0)
1735 case CLIENT_SERVICE:
1736 maxcmd = MAX_COMMANDS_SERVICE;
1739 if (Client_HasMode(c, 'F'))
1740 maxcmd = MAX_COMMANDS_SERVICE;
1744 for (i=0; i < maxcmd; i++) {
1746 if (My_Connections[Idx].delaytime > starttime)
1749 /* Unpack compressed data, if compression is in use */
1750 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1751 /* When unzipping fails, Unzip_Buffer() shuts
1752 * down the connection itself */
1753 if (!Unzip_Buffer(Idx))
1758 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1761 /* Make sure that the buffer is NULL terminated */
1762 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1763 Conn_Close(Idx, NULL,
1764 "Can't allocate memory [Handle_Buffer]",
1769 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1770 * "IRC messages are always lines of characters terminated
1771 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1773 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1776 /* Check for non-RFC-compliant request (only CR or LF)?
1777 * Unfortunately, there are quite a few clients out there
1778 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1779 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1780 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1782 /* Check if there is a single CR or LF _before_ the
1783 * correct CR+LF line terminator: */
1784 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1785 if (first_eol < ptr) {
1786 /* Single CR or LF before CR+LF found */
1790 } else if (ptr1 || ptr2) {
1791 /* No CR+LF terminated command found, but single
1792 * CR or LF found ... */
1794 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1796 ptr = ptr1 ? ptr1 : ptr2;
1804 /* Complete (=line terminated) request found, handle it! */
1807 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1809 if (len > (COMMAND_LEN - 1)) {
1810 /* Request must not exceed 512 chars (incl. CR+LF!),
1811 * see RFC 2812. Disconnect Client if this happens. */
1813 "Request too long (connection %d): %d bytes (max. %d expected)!",
1814 Idx, array_bytes(&My_Connections[Idx].rbuf),
1816 Conn_Close(Idx, NULL, "Request too long", true);
1820 len_processed += (unsigned int)len;
1822 /* Request is empty (only '\r\n', '\r' or '\n');
1823 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1824 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1828 /* remember if stream is already compressed */
1829 old_z = My_Connections[Idx].options & CONN_ZIP;
1832 My_Connections[Idx].msg_in++;
1834 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1835 return 0; /* error -> connection has been closed */
1837 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1839 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1840 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1841 /* The last command activated socket compression.
1842 * Data that was read after that needs to be copied
1843 * to the unzip buffer for decompression: */
1845 (&My_Connections[Idx].zip.rbuf,
1846 &My_Connections[Idx].rbuf)) {
1847 Conn_Close(Idx, NULL,
1848 "Can't allocate memory [Handle_Buffer]",
1853 array_trunc(&My_Connections[Idx].rbuf);
1855 ("Moved already received data (%u bytes) to uncompression buffer.",
1856 array_bytes(&My_Connections[Idx].zip.rbuf));
1861 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1862 Idx, i, maxcmd, len_processed,
1863 array_bytes(&My_Connections[Idx].rbuf));
1866 /* If data has been processed but there is still data in the read
1867 * buffer, the command limit triggered. Enforce the penalty time: */
1868 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1869 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1871 return len_processed;
1872 } /* Handle_Buffer */
1875 * Check whether established connections are still alive or not.
1876 * If not, play PING-PONG first; and if that doesn't help either,
1877 * disconnect the respective peer.
1880 Check_Connections(void)
1887 time_now = time(NULL);
1889 for (i = 0; i < Pool_Size; i++) {
1890 if (My_Connections[i].sock < 0)
1893 c = Conn_GetClient(i);
1894 if (c && ((Client_Type(c) == CLIENT_USER)
1895 || (Client_Type(c) == CLIENT_SERVER)
1896 || (Client_Type(c) == CLIENT_SERVICE))) {
1897 /* connected User, Server or Service */
1898 if (My_Connections[i].lastping >
1899 My_Connections[i].lastdata) {
1900 /* We already sent a ping */
1901 if (My_Connections[i].lastping <
1902 time_now - Conf_PongTimeout) {
1904 snprintf(msg, sizeof(msg),
1905 "Ping timeout: %d seconds",
1907 LogDebug("Connection %d: %s.", i, msg);
1908 Conn_Close(i, NULL, msg, true);
1910 } else if (My_Connections[i].lastdata <
1911 time_now - Conf_PingTimeout) {
1912 /* We need to send a PING ... */
1913 LogDebug("Connection %d: sending PING ...", i);
1914 Conn_UpdatePing(i, time_now);
1915 Conn_WriteStr(i, "PING :%s",
1916 Client_ID(Client_ThisServer()));
1919 /* The connection is not fully established yet, so
1920 * we don't do the PING-PONG game here but instead
1921 * disconnect the client after "a short time" if it's
1922 * still not registered. */
1924 if (My_Connections[i].lastdata <
1925 time_now - Conf_PongTimeout) {
1927 ("Unregistered connection %d timed out ...",
1929 Conn_Close(i, NULL, "Timeout", false);
1933 } /* Check_Connections */
1936 * Check if further server links should be established.
1944 time_now = time(NULL);
1946 /* Check all configured servers */
1947 for (i = 0; i < MAX_SERVERS; i++) {
1948 if (Conf_Server[i].conn_id != NONE)
1949 continue; /* Already establishing or connected */
1950 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1951 continue; /* No host and/or port configured */
1952 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1953 continue; /* Disabled configuration entry */
1954 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1955 continue; /* We have to wait a little bit ... */
1957 /* Is there already a connection in this group? */
1958 if (Conf_Server[i].group > NONE) {
1959 for (n = 0; n < MAX_SERVERS; n++) {
1962 if ((Conf_Server[n].conn_id != NONE) &&
1963 (Conf_Server[n].group == Conf_Server[i].group))
1966 if (n < MAX_SERVERS)
1970 /* Okay, try to connect now */
1972 "Preparing to establish a new server link for \"%s\" ...",
1973 Conf_Server[i].name);
1974 Conf_Server[i].lasttry = time_now;
1975 Conf_Server[i].conn_id = SERVER_WAIT;
1976 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1978 /* Start resolver subprocess ... */
1979 if (!Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1980 cb_Connect_to_Server))
1981 Conf_Server[i].conn_id = NONE;
1983 } /* Check_Servers */
1986 * Establish a new outgoing server connection.
1988 * @param Server Configuration index of the server.
1989 * @param dest Destination IP address to connect to.
1992 New_Server( int Server , ng_ipaddr_t *dest)
1994 /* Establish new server link */
1995 char ip_str[NG_INET_ADDRSTRLEN];
1996 int af_dest, res, new_sock;
1999 assert( Server > NONE );
2001 /* Make sure that the remote server hasn't re-linked to this server
2002 * asynchronously on its own */
2003 if (Conf_Server[Server].conn_id > NONE) {
2005 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
2009 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
2010 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
2011 Conf_Server[Server].conn_id = NONE;
2015 af_dest = ng_ipaddr_af(dest);
2016 new_sock = socket(af_dest, SOCK_STREAM, 0);
2019 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
2020 Conf_Server[Server].name, Conf_Server[Server].host,
2021 Conf_Server[Server].port, ip_str, new_sock);
2024 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
2025 af_dest, strerror(errno));
2026 Conf_Server[Server].conn_id = NONE;
2030 if (!Init_Socket(new_sock)) {
2031 Conf_Server[Server].conn_id = NONE;
2035 /* is a bind address configured? */
2036 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
2038 /* if yes, bind now. If it fails, warn and let connect() pick a
2040 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
2041 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
2043 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
2044 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
2047 ng_ipaddr_setport(dest, Conf_Server[Server].port);
2048 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
2049 if(( res != 0 ) && ( errno != EINPROGRESS )) {
2050 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2052 Conf_Server[Server].conn_id = NONE;
2056 if (Socket2Index(new_sock) <= NONE) {
2058 Conf_Server[Server].conn_id = NONE;
2062 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2063 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2066 Conf_Server[Server].conn_id = NONE;
2070 assert(My_Connections[new_sock].sock <= 0);
2072 Init_Conn_Struct(new_sock);
2074 ng_ipaddr_tostr_r(dest, ip_str);
2075 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2077 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2079 Conf_Server[Server].conn_id = NONE;
2083 /* Conn_Close() decrements this counter again */
2084 Account_Connection();
2085 Client_SetIntroducer( c, c );
2086 Client_SetToken( c, TOKEN_OUTBOUND );
2088 /* Register connection */
2089 if (!Conf_SetServer(Server, new_sock))
2091 My_Connections[new_sock].sock = new_sock;
2092 My_Connections[new_sock].addr = *dest;
2093 My_Connections[new_sock].client = c;
2094 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2095 sizeof(My_Connections[new_sock].host ));
2098 if (Conf_Server[Server].SSLConnect &&
2099 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2101 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2102 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2104 Init_Conn_Struct(new_sock);
2105 Conf_Server[Server].conn_id = NONE;
2109 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2110 new_sock, My_Connections[new_sock].sock, NumConnections);
2111 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2115 * Initialize connection structure.
2117 * @param Idx Connection index.
2120 Init_Conn_Struct(CONN_ID Idx)
2122 time_t now = time(NULL);
2124 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2125 My_Connections[Idx].sock = -1;
2126 My_Connections[Idx].signon = now;
2127 My_Connections[Idx].lastdata = now;
2128 My_Connections[Idx].lastprivmsg = now;
2129 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2132 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2133 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2135 } /* Init_Conn_Struct */
2138 * Initialize options of a new socket.
2140 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2141 * The socket is automatically closed if a fatal error is encountered.
2143 * @param Sock Socket handle.
2144 * @returns false if socket was closed due to fatal error.
2147 Init_Socket( int Sock )
2151 if (!io_setnonblock(Sock)) {
2152 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2158 /* Don't block this port after socket shutdown */
2160 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2161 (socklen_t)sizeof(value)) != 0) {
2162 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2164 /* ignore this error */
2167 /* Set type of service (TOS) */
2168 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2169 value = IPTOS_LOWDELAY;
2170 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2171 (socklen_t) sizeof(value))) {
2172 LogDebug("Can't set socket option IP_TOS: %s!",
2174 /* ignore this error */
2176 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2184 * Read results of a resolver sub-process and try to initiate a new server
2187 * @param fd File descriptor of the pipe to the sub-process.
2188 * @param events (ignored IO specification)
2191 cb_Connect_to_Server(int fd, UNUSED short events)
2196 /* we can handle at most 3 addresses; but we read up to 4 so we can
2197 * log the 'more than we can handle' condition. First result is tried
2198 * immediately, rest is saved for later if needed. */
2199 ng_ipaddr_t dest_addrs[4];
2201 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2204 for (i=0; i < MAX_SERVERS; i++) {
2205 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2209 if( i >= MAX_SERVERS) {
2210 /* Ops, no matching server found?! */
2212 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2216 /* Read result from pipe */
2217 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2218 Proc_Close(&Conf_Server[i].res_stat);
2220 /* Error resolving hostname: reset server structure */
2221 Conf_Server[i].conn_id = NONE;
2225 assert((len % sizeof(ng_ipaddr_t)) == 0);
2227 LogDebug("Got result from resolver: %u structs (%u bytes).",
2228 len/sizeof(ng_ipaddr_t), len);
2230 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2231 if (len > sizeof(ng_ipaddr_t)) {
2232 /* more than one address for this hostname, remember them
2233 * in case first address is unreachable/not available */
2234 len -= sizeof(ng_ipaddr_t);
2235 if (len > sizeof(Conf_Server[i].dst_addr)) {
2236 len = sizeof(Conf_Server[i].dst_addr);
2238 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2240 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2243 New_Server(i, dest_addrs);
2244 } /* cb_Read_Forward_Lookup */
2247 * Read results of a resolver sub-process from the pipe and update the
2248 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2250 * @param r_fd File descriptor of the pipe to the sub-process.
2251 * @param events (ignored IO specification)
2254 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2261 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2264 char readbuf[HOST_LEN + 1];
2267 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2268 i = Conn_GetFromProc(r_fd);
2270 /* Ops, none found? Probably the connection has already
2271 * been closed!? We'll ignore that ... */
2273 LogDebug("Resolver: Got callback for unknown connection!?");
2277 /* Read result from pipe */
2278 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2279 Proc_Close(&My_Connections[i].proc_stat);
2283 readbuf[len] = '\0';
2284 identptr = strchr(readbuf, '\n');
2285 assert(identptr != NULL);
2287 Log( LOG_CRIT, "Resolver: Got malformed result!");
2292 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2293 /* Okay, we got a complete result: this is a host name for outgoing
2294 * connections and a host name and IDENT user name (if enabled) for
2295 * incoming connections.*/
2296 assert ( My_Connections[i].sock >= 0 );
2297 /* Incoming connection. Search client ... */
2298 c = Conn_GetClient( i );
2299 assert( c != NULL );
2301 /* Only update client information of unregistered clients.
2302 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2303 * the resolver results, so we don't have to worry to override settings
2304 * from these commands here. */
2305 if(Client_Type(c) == CLIENT_UNKNOWN) {
2307 /* We got a hostname */
2308 strlcpy(My_Connections[i].host, readbuf,
2309 sizeof(My_Connections[i].host));
2310 Client_SetHostname(c, readbuf);
2311 if (Conf_NoticeBeforeRegistration)
2312 (void)Conn_WriteStr(i,
2313 "NOTICE * :*** Found your hostname: %s",
2314 My_Connections[i].host);
2321 if ((*ptr < '0' || *ptr > '9') &&
2322 (*ptr < 'A' || *ptr > 'Z') &&
2323 (*ptr < 'a' || *ptr > 'z'))
2328 /* Erroneous IDENT reply */
2330 "Got invalid IDENT reply for connection %d! Ignored.",
2334 "IDENT lookup for connection %d: \"%s\".",
2336 Client_SetUser(c, identptr, true);
2338 if (Conf_NoticeBeforeRegistration) {
2339 (void)Conn_WriteStr(i,
2340 "NOTICE * :*** Got %sident response%s%s",
2341 *ptr ? "invalid " : "",
2343 *ptr ? "" : identptr);
2345 } else if(Conf_Ident) {
2346 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2347 if (Conf_NoticeBeforeRegistration)
2348 (void)Conn_WriteStr(i,
2349 "NOTICE * :*** No ident response");
2353 if (Conf_NoticeBeforeRegistration) {
2354 /* Send buffered data to the client, but break on
2355 * errors because Handle_Write() would have closed
2356 * the connection again in this case! */
2357 if (!Handle_Write(i))
2361 Class_HandleServerBans(c);
2364 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2365 } /* cb_Read_Resolver_Result */
2368 * Write a "simple" (error) message to a socket.
2370 * The message is sent without using the connection write buffers, without
2371 * compression/encryption, and even without any error reporting. It is
2372 * designed for error messages of e.g. New_Connection().
2374 * @param Sock Socket handle.
2375 * @param Msg Message string to send.
2378 Simple_Message(int Sock, const char *Msg)
2380 char buf[COMMAND_LEN];
2383 assert(Sock > NONE);
2384 assert(Msg != NULL);
2386 strlcpy(buf, Msg, sizeof buf - 2);
2387 len = strlcat(buf, "\r\n", sizeof buf);
2388 if (write(Sock, buf, len) < 0) {
2389 /* Because this function most probably got called to log
2390 * an error message, any write error is ignored here to
2391 * avoid an endless loop. But casting the result of write()
2392 * to "void" doesn't satisfy the GNU C code attribute
2393 * "warn_unused_result" which is used by some versions of
2394 * glibc (e.g. 2.11.1), therefore this silly error
2395 * "handling" code here :-( */
2398 } /* Simple_Error */
2401 * Get CLIENT structure that belongs to a local connection identified by its
2402 * index number. Each connection belongs to a client by definition, so it is
2403 * not required that the caller checks for NULL return values.
2405 * @param Idx Connection index number.
2406 * @returns Pointer to CLIENT structure.
2409 Conn_GetClient( CONN_ID Idx )
2414 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2416 return c ? c->client : NULL;
2420 * Get PROC_STAT sub-process structure of a connection.
2422 * @param Idx Connection index number.
2423 * @returns PROC_STAT structure.
2426 Conn_GetProcStat(CONN_ID Idx)
2431 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2433 return &c->proc_stat;
2434 } /* Conn_GetProcStat */
2437 * Get CONN_ID from file descriptor associated to a subprocess structure.
2439 * @param fd File descriptor.
2440 * @returns CONN_ID or NONE (-1).
2443 Conn_GetFromProc(int fd)
2448 for (i = 0; i < Pool_Size; i++) {
2449 if ((My_Connections[i].sock != NONE)
2450 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2454 } /* Conn_GetFromProc */
2457 * Throttle a connection because of excessive usage.
2459 * @param Reason The reason, see THROTTLE_xxx constants.
2460 * @param Idx The connection index.
2461 * @param Client The client of this connection.
2462 * @param Value The time to delay this connection.
2465 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2469 assert(Client != NULL);
2471 /* Never throttle servers or services, only interrupt processing */
2472 if (Client_Type(Client) == CLIENT_SERVER
2473 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2474 || Client_Type(Client) == CLIENT_SERVICE)
2477 /* Don't throttle clients with user mode 'F' set */
2478 if (Client_HasMode(Client, 'F'))
2481 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2483 Conn_SetPenalty(Idx, 1);
2489 Conn_GetAuthPing(CONN_ID Idx)
2491 assert (Idx != NONE);
2492 return My_Connections[Idx].auth_ping;
2493 } /* Conn_GetAuthPing */
2496 Conn_SetAuthPing(CONN_ID Idx, long ID)
2498 assert (Idx != NONE);
2499 My_Connections[Idx].auth_ping = ID;
2500 } /* Conn_SetAuthPing */
2502 #endif /* STRICT_RFC */
2507 * IO callback for new SSL-enabled client and server connections.
2509 * @param sock Socket descriptor.
2510 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2513 cb_clientserver_ssl(int sock, UNUSED short what)
2515 CONN_ID idx = Socket2Index(sock);
2522 switch (ConnSSL_Accept(&My_Connections[idx])) {
2526 return; /* EAGAIN: callback will be invoked again by IO layer */
2529 "SSL accept error, closing socket", "SSL accept error",
2534 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2538 * IO callback for listening SSL sockets: handle new connections. This callback
2539 * gets called when a new SSL-enabled connection should be accepted.
2541 * @param sock Socket descriptor.
2542 * @param irrelevant (ignored IO specification)
2545 cb_listen_ssl(int sock, short irrelevant)
2550 fd = New_Connection(sock, true);
2553 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2557 * IO callback for new outgoing SSL-enabled server connections.
2559 * @param sock Socket descriptor.
2560 * @param unused (ignored IO specification)
2563 cb_connserver_login_ssl(int sock, short unused)
2565 CONN_ID idx = Socket2Index(sock);
2575 switch (ConnSSL_Connect( &My_Connections[idx])) {
2577 case 0: LogDebug("ConnSSL_Connect: not ready");
2580 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2581 Conn_Close(idx, "Can't connect", NULL, false);
2585 serveridx = Conf_GetServer(idx);
2586 assert(serveridx >= 0);
2590 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2591 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2593 if (!Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_PEERCERT_OK)) {
2594 if (Conf_Server[serveridx].SSLVerify) {
2596 "SSLVerify enabled for %d, but peer certificate check failed",
2601 "Peer certificate check failed for %d, but SSLVerify is disabled, continuing",
2607 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2608 Conn_Close(idx, "Can't connect!", NULL, false);
2613 * Check if SSL library needs to read SSL-protocol related data.
2615 * SSL/TLS connections require extra treatment:
2616 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2617 * need to take care of that first, before checking read/write buffers.
2618 * For instance, while we might have data in our write buffer, the
2619 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2620 * writes to succeed.
2622 * If this function returns true, such a condition is met and we have
2623 * to reverse the condition (check for read even if we've data to write,
2624 * do not check for read but writeability even if write-buffer is empty).
2626 * @param c Connection to check.
2627 * @returns true if SSL-library has to read protocol data.
2630 SSL_WantRead(const CONNECTION *c)
2632 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2633 io_event_add(c->sock, IO_WANTREAD);
2640 * Check if SSL library needs to write SSL-protocol related data.
2642 * Please see description of SSL_WantRead() for full description!
2644 * @param c Connection to check.
2645 * @returns true if SSL-library has to write protocol data.
2648 SSL_WantWrite(const CONNECTION *c)
2650 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2651 io_event_add(c->sock, IO_WANTWRITE);
2658 * Get information about used SSL cipher.
2660 * @param Idx Connection index number.
2661 * @param buf Buffer for returned information text.
2662 * @param len Size of return buffer "buf".
2663 * @returns true on success, false otherwise.
2666 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2670 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2671 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2675 * Check if a connection is SSL-enabled or not.
2677 * @param Idx Connection index number.
2678 * @return true if connection is SSL-enabled, false otherwise.
2681 Conn_UsesSSL(CONN_ID Idx)
2685 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2686 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2690 Conn_GetCertFp(CONN_ID Idx)
2694 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2695 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2699 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2703 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2704 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2707 #else /* SSL_SUPPORT */
2710 Conn_UsesSSL(UNUSED CONN_ID Idx)
2716 Conn_GetCertFp(UNUSED CONN_ID Idx)
2722 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2727 #endif /* SSL_SUPPORT */
2731 * Dump internal state of the "connection module".
2734 Conn_DebugDump(void)
2738 LogDebug("Connection status:");
2739 for (i = 0; i < Pool_Size; i++) {
2740 if (My_Connections[i].sock == NONE)
2743 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2744 My_Connections[i].sock, My_Connections[i].host,
2745 My_Connections[i].lastdata, My_Connections[i].lastping,
2746 My_Connections[i].delaytime, My_Connections[i].flag,
2747 My_Connections[i].options, My_Connections[i].bps,
2748 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2750 } /* Conn_DumpClients */