2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
18 * Connection management
21 /* Additionan debug messages related to buffer handling: 0=off / 1=on */
22 #define DEBUG_BUFFER 0
36 #include <sys/socket.h>
38 #include <sys/types.h>
40 #include <netinet/in.h>
42 #ifdef HAVE_NETINET_IP_H
43 # ifdef HAVE_NETINET_IN_SYSTM_H
44 # include <netinet/in_systm.h>
46 # include <netinet/ip.h>
50 # include <tcpd.h> /* for TCP Wrappers */
58 # include "conn-encoding.h"
62 #include "conn-func.h"
65 #include "ng_ipaddr.h"
69 #define SERVER_WAIT (NONE - 1) /** "Wait for outgoing connection" flag */
71 #define MAX_COMMANDS 3 /** Max. commands per loop for users */
72 #define MAX_COMMANDS_SERVER_MIN 10 /** Min. commands per loop for servers */
73 #define MAX_COMMANDS_SERVICE 10 /** Max. commands per loop for services */
75 #define SD_LISTEN_FDS_START 3 /** systemd(8) socket activation offset */
77 #define THROTTLE_CMDS 1 /** Throttling: max commands reached */
78 #define THROTTLE_BPS 2 /** Throttling: max bps reached */
80 static bool Handle_Write PARAMS(( CONN_ID Idx ));
81 static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
82 static int New_Connection PARAMS(( int Sock, bool IsSSL ));
83 static CONN_ID Socket2Index PARAMS(( int Sock ));
84 static void Read_Request PARAMS(( CONN_ID Idx ));
85 static unsigned int Handle_Buffer PARAMS(( CONN_ID Idx ));
86 static void Check_Connections PARAMS(( void ));
87 static void Check_Servers PARAMS(( void ));
88 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
89 static bool Init_Socket PARAMS(( int Sock ));
90 static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
91 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
92 static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
93 static void Account_Connection PARAMS((void));
94 static void Throttle_Connection PARAMS((const CONN_ID Idx, CLIENT *Client,
95 const int Reason, unsigned int Value));
97 static array My_Listeners;
98 static array My_ConnArray;
99 static size_t NumConnections, NumConnectionsMax, NumConnectionsAccepted;
102 int allow_severity = LOG_INFO;
103 int deny_severity = LOG_ERR;
106 static void server_login PARAMS((CONN_ID idx));
109 extern struct SSLOptions Conf_SSLOptions;
110 static bool SSL_WantRead PARAMS((const CONNECTION *c));
111 static bool SSL_WantWrite PARAMS((const CONNECTION *c));
112 static void cb_listen_ssl PARAMS((int sock, short irrelevant));
113 static void cb_connserver_login_ssl PARAMS((int sock, short what));
114 static void cb_clientserver_ssl PARAMS((int sock, short what));
116 static void cb_Read_Resolver_Result PARAMS((int sock, UNUSED short what));
117 static void cb_Connect_to_Server PARAMS((int sock, UNUSED short what));
118 static void cb_clientserver PARAMS((int sock, short what));
123 * Get number of sockets available from systemd(8).
125 * ngIRCd needs to implement its own sd_listen_fds(3) function and can't
126 * use the one provided by systemd itself, because the sockets will be
127 * used in a forked child process with a new PID, and this would trigger
128 * an error in the standard implementation.
130 * @return Number of sockets available, -1 if sockets have already been
131 * initialized, or 0 when no sockets have been passed.
134 my_sd_listen_fds(void)
139 /* Check if LISTEN_PID exists; but we ignore the result, because
140 * normally ngircd forks a child before checking this, and therefore
141 * the PID set in the environment is always wrong ... */
142 e = getenv("LISTEN_PID");
146 e = getenv("LISTEN_FDS");
151 unsetenv("LISTEN_FDS");
158 * IO callback for listening sockets: handle new connections. This callback
159 * gets called when a new non-SSL connection should be accepted.
161 * @param sock Socket descriptor.
162 * @param irrelevant (ignored IO specification)
165 cb_listen(int sock, short irrelevant)
168 (void) New_Connection(sock, false);
172 * IO callback for new outgoing non-SSL server connections.
174 * @param sock Socket descriptor.
175 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
178 cb_connserver(int sock, UNUSED short what)
180 int res, err, server;
182 CONN_ID idx = Socket2Index( sock );
185 LogDebug("cb_connserver wants to write on unknown socket?!");
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);
290 if (what & IO_WANTREAD
291 || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE))) {
292 /* if TLS layer needs to write additional data, call
293 * Read_Request() instead so that SSL/TLS can continue */
297 if (what & IO_WANTREAD)
300 if (what & IO_WANTWRITE)
305 * Initialize connection module.
312 Pool_Size = CONNECTION_POOL;
313 if ((Conf_MaxConnections > 0) &&
314 (Pool_Size > Conf_MaxConnections))
315 Pool_Size = Conf_MaxConnections;
317 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
318 Log(LOG_EMERG, "Can't allocate memory! [Conn_Init]");
322 /* FIXME: My_Connetions/Pool_Size is needed by other parts of the
323 * code; remove them! */
324 My_Connections = (CONNECTION*) array_start(&My_ConnArray);
326 LogDebug("Allocated connection pool for %d items (%ld bytes).",
327 array_length(&My_ConnArray, sizeof(CONNECTION)),
328 array_bytes(&My_ConnArray));
330 assert(array_length(&My_ConnArray, sizeof(CONNECTION)) >= (size_t)Pool_Size);
332 array_free( &My_Listeners );
334 for (i = 0; i < Pool_Size; i++)
339 * Clean up connection module.
346 Conn_ExitListeners();
348 LogDebug("Shutting down all connections ..." );
349 for( idx = 0; idx < Pool_Size; idx++ ) {
350 if( My_Connections[idx].sock > NONE ) {
351 Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
352 "Server going down (restarting)":"Server going down", true );
356 array_free(&My_ConnArray);
357 My_Connections = NULL;
359 io_library_shutdown();
363 * Close all sockets (file descriptors) of open connections.
364 * This is useful in forked child processes, for example, to make sure that
365 * they don't hold connections open that the main process wants to close.
368 Conn_CloseAllSockets(int ExceptOf)
372 for(idx = 0; idx < Pool_Size; idx++) {
373 if(My_Connections[idx].sock > NONE &&
374 My_Connections[idx].sock != ExceptOf)
375 close(My_Connections[idx].sock);
380 * Initialize listening ports.
382 * @param a Array containing the ports the daemon should listen on.
383 * @param listen_addr Address the socket should listen on (can be "0.0.0.0").
384 * @param func IO callback function to register.
385 * @returns Number of listening sockets created.
388 Init_Listeners(array *a, const char *listen_addr, void (*func)(int,short))
390 unsigned int created = 0;
395 len = array_length(a, sizeof (UINT16));
396 port = array_start(a);
398 fd = NewListener(listen_addr, *port);
403 if (!io_event_create( fd, IO_WANTREAD, func )) {
405 "io_event_create(): Can't add fd %d (port %u): %s!",
406 fd, (unsigned int) *port, strerror(errno));
418 * Initialize all listening sockets.
420 * @returns Number of created listening sockets
423 Conn_InitListeners( void )
425 /* Initialize ports on which the server should accept connections */
426 unsigned int created = 0;
427 char *af_str, *copy, *listen_addr;
428 int count, fd, i, addr_len;
431 assert(Conf_ListenAddress);
433 count = my_sd_listen_fds();
436 "Not re-initializing listening sockets of systemd(8) ...");
440 /* systemd(8) passed sockets to us, so don't try to initialize
441 * listening sockets on our own but use the passed ones */
442 LogDebug("Initializing %d systemd sockets ...", count);
443 for (i = 0; i < count; i++) {
444 fd = SD_LISTEN_FDS_START + i;
445 addr_len = (int)sizeof(addr);
446 getsockname(fd, (struct sockaddr *)&addr,
447 (socklen_t*)&addr_len);
449 if (addr.sin4.sin_family != AF_INET
450 && addr.sin4.sin_family != AF_INET6)
452 if (addr.sin4.sin_family != AF_INET)
455 /* Socket is of unsupported type! For example,
456 * systemd passed in an IPv6 socket but ngIRCd
457 * isn't compiled with IPv6 support. */
458 switch (addr.sin4.sin_family)
460 case AF_UNSPEC: af_str = "AF_UNSPEC"; break;
461 case AF_UNIX: af_str = "AF_UNIX"; break;
462 case AF_INET: af_str = "AF_INET"; break;
464 case AF_INET6: af_str = "AF_INET6"; break;
467 case AF_NETLINK: af_str = "AF_NETLINK"; break;
469 default: af_str = "unknown"; break;
472 "Socket %d is of unsupported type \"%s\" (%d), have to ignore it!",
473 fd, af_str, addr.sin4.sin_family);
479 if (!io_event_create(fd, IO_WANTREAD, cb_listen)) {
481 "io_event_create(): Can't add fd %d: %s!",
482 fd, strerror(errno));
486 "Initialized socket %d from systemd(8): %s:%d.", fd,
487 ng_ipaddr_tostr(&addr), ng_ipaddr_getport(&addr));
493 /* not using systemd socket activation, initialize listening sockets: */
495 /* can't use Conf_ListenAddress directly, see below */
496 copy = strdup(Conf_ListenAddress);
498 Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress,
502 listen_addr = strtok(copy, ",");
504 while (listen_addr) {
505 ngt_TrimStr(listen_addr);
507 created += Init_Listeners(&Conf_ListenPorts,
508 listen_addr, cb_listen);
510 created += Init_Listeners(&Conf_SSLOptions.ListenPorts,
511 listen_addr, cb_listen_ssl);
515 listen_addr = strtok(NULL, ",");
518 /* Can't free() Conf_ListenAddress here: on REHASH, if the config file
519 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
520 * Instead, free() takes place in conf.c, before the config file
521 * is being parsed. */
525 } /* Conn_InitListeners */
528 * Shut down all listening sockets.
531 Conn_ExitListeners( void )
533 /* Close down all listening sockets */
537 /* Get number of listening sockets to shut down. There can be none
538 * if ngIRCd has been "socket activated" by systemd. */
539 arraylen = array_length(&My_Listeners, sizeof (int));
544 "Shutting down all listening sockets (%d total) ...", arraylen);
545 fd = array_start(&My_Listeners);
550 LogDebug("Listening socket %d closed.", *fd );
553 array_free(&My_Listeners);
554 } /* Conn_ExitListeners */
557 * Bind a socket to a specific (source) address.
559 * @param addr Address structure.
560 * @param listen_addrstr Source address as string.
561 * @param Port Port number.
562 * @returns true on success, false otherwise.
565 InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
569 ret = ng_ipaddr_init(addr, listen_addrstr, Port);
571 assert(listen_addrstr);
573 "Can't bind to [%s]:%u: can't convert ip address \"%s\"!",
574 listen_addrstr, Port, listen_addrstr);
580 * Set a socket to "IPv6 only". If the given socket doesn't belong to the
581 * AF_INET6 family, or the operating system doesn't support this functionality,
582 * this function retruns silently.
584 * @param af Address family of the socket.
585 * @param sock Socket handle.
588 set_v6_only(int af, int sock)
590 #if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
596 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, (socklen_t)sizeof(on)))
597 Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
605 * Initialize new listening port.
607 * @param listen_addr Local address to bind the socet to (can be 0.0.0.0).
608 * @param Port Port number on which the new socket should be listening.
609 * @returns file descriptor of the socket or -1 on failure.
612 NewListener(const char *listen_addr, UINT16 Port)
614 /* Create new listening socket on specified port */
618 if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
621 af = ng_ipaddr_af(&addr);
622 sock = socket(af, SOCK_STREAM, 0);
624 Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af,
629 set_v6_only(af, sock);
631 if (!Init_Socket(sock))
634 if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
635 Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s!",
636 ng_ipaddr_tostr(&addr), Port, strerror(errno));
641 if (listen(sock, 10) != 0) {
642 Log(LOG_CRIT, "Can't listen on socket: %s!", strerror(errno));
647 /* keep fd in list so we can close it when ngircd restarts/shuts down */
648 if (!array_catb(&My_Listeners, (char *)&sock, sizeof(int))) {
649 Log(LOG_CRIT, "Can't add socket to My_Listeners array: %s!",
655 Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
656 ng_ipaddr_tostr(&addr), Port, sock);
661 * "Main Loop": Loop until shutdown or restart is signalled.
663 * This function loops until a shutdown or restart of ngIRCd is signalled and
664 * calls io_dispatch() to check for readable and writable sockets every second.
665 * It checks for status changes on pending connections (e. g. when a hostname
666 * has been resolved), checks for "penalties" and timeouts, and handles the
677 while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
680 /* Check configured servers and established links */
684 /* Expire outdated class/list items */
687 /* Look for non-empty read buffers ... */
688 for (i = 0; i < Pool_Size; i++) {
689 if ((My_Connections[i].sock > NONE)
690 && (array_bytes(&My_Connections[i].rbuf) > 0)) {
691 /* ... and try to handle the received data */
696 /* Look for non-empty write buffers ... */
697 for (i = 0; i < Pool_Size; i++) {
698 if (My_Connections[i].sock <= NONE)
701 wdatalen = array_bytes(&My_Connections[i].wbuf);
704 array_bytes(&My_Connections[i].zip.wbuf) > 0)
710 if (SSL_WantRead(&My_Connections[i]))
713 io_event_add(My_Connections[i].sock,
718 /* Check from which sockets we possibly could read ... */
719 for (i = 0; i < Pool_Size; i++) {
720 if (My_Connections[i].sock <= NONE)
723 if (SSL_WantWrite(&My_Connections[i]))
724 /* TLS/SSL layer needs to write data; deal
725 * with this first! */
728 if (Proc_InProgress(&My_Connections[i].proc_stat)) {
729 /* Wait for completion of forked subprocess
730 * and ignore the socket in the meantime ... */
731 io_event_del(My_Connections[i].sock,
736 if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
737 /* Wait for completion of connect() ... */
740 if (My_Connections[i].delaytime > t) {
741 /* There is a "penalty time" set: ignore socket! */
742 io_event_del(My_Connections[i].sock,
747 io_event_add(My_Connections[i].sock, IO_WANTREAD);
750 /* Set the timeout for reading from the network to 1 second,
751 * which is the granularity with witch we handle "penalty
752 * times" for example.
753 * Note: tv_sec/usec are undefined(!) after io_dispatch()
754 * returns, so we have to set it before each call to it! */
758 /* Wait for activity ... */
759 i = io_dispatch(&tv);
760 if (i == -1 && errno != EINTR) {
761 Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
763 Log(LOG_ALERT, "%s exiting due to fatal errors!",
768 /* Should ngIRCd timeout when idle? */
769 if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
770 && idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
771 LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
773 Conf_IdleTimeout == 1 ? "" : "s");
774 NGIRCd_SignalQuit = true;
778 if (NGIRCd_SignalQuit)
779 Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
780 else if (NGIRCd_SignalRestart)
781 Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
785 * Write a text string into the socket of a connection.
787 * This function automatically appends CR+LF to the string and validates that
788 * the result is a valid IRC message (oversized messages are shortened, for
789 * example). Then it calls the Conn_Write() function to do the actual sending.
791 * @param Idx Index fo the connection.
792 * @param Format Format string, see printf().
793 * @returns true on success, false otherwise.
797 Conn_WriteStr(CONN_ID Idx, const char *Format, ...)
800 Conn_WriteStr(Idx, Format, va_alist)
806 char buffer[COMMAND_LEN];
815 assert( Idx > NONE );
816 assert( Format != NULL );
819 va_start( ap, Format );
823 r = vsnprintf(buffer, COMMAND_LEN - 2, Format, ap);
824 if (r >= COMMAND_LEN - 2 || r == -1) {
826 * The string that should be written to the socket is longer
827 * than the allowed size of COMMAND_LEN bytes (including both
828 * the CR and LF characters). This can be caused by the
829 * IRC_WriteXXX() functions when the prefix of this server had
830 * to be added to an already "quite long" command line which
831 * has been received from a regular IRC client, for example.
833 * We are not allowed to send such "oversized" messages to
834 * other servers and clients, see RFC 2812 2.3 and 2813 3.3
835 * ("these messages SHALL NOT exceed 512 characters in length,
836 * counting all characters including the trailing CR-LF").
838 * So we have a big problem here: we should send more bytes
839 * to the network than we are allowed to and we don't know
840 * the originator (any more). The "old" behavior of blaming
841 * the receiver ("next hop") is a bad idea (it could be just
842 * an other server only routing the message!), so the only
843 * option left is to shorten the string and to hope that the
844 * result is still somewhat useful ...
847 * C99 states that vsnprintf() "returns the number of characters
848 * that would have been printed if the n were unlimited"; but
849 * according to the Linux manual page "glibc until 2.0.6 would
850 * return -1 when the output was truncated" -- so we have to
851 * handle both cases ...
855 strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
860 ptr = strchr(buffer + 1, ':');
863 message = Conn_EncodingTo(Idx, ptr);
865 strlcpy(ptr, message, sizeof(buffer) - (ptr - buffer));
871 Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
874 len = strlcat( buffer, "\r\n", sizeof( buffer ));
875 ok = Conn_Write(Idx, buffer, len);
876 My_Connections[Idx].msg_out++;
880 } /* Conn_WriteStr */
883 Conn_Password( CONN_ID Idx )
885 assert( Idx > NONE );
886 if (My_Connections[Idx].pwd == NULL)
889 return My_Connections[Idx].pwd;
890 } /* Conn_Password */
893 Conn_SetPassword( CONN_ID Idx, const char *Pwd )
895 assert( Idx > NONE );
897 if (My_Connections[Idx].pwd)
898 free(My_Connections[Idx].pwd);
900 My_Connections[Idx].pwd = strdup(Pwd);
901 if (My_Connections[Idx].pwd == NULL) {
902 Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
905 } /* Conn_SetPassword */
908 * Append Data to the outbound write buffer of a connection.
910 * @param Idx Index of the connection.
911 * @param Data pointer to the data.
912 * @param Len length of Data.
913 * @returns true on success, false otherwise.
916 Conn_Write( CONN_ID Idx, char *Data, size_t Len )
919 size_t writebuf_limit = WRITEBUFFER_MAX_LEN;
920 assert( Idx > NONE );
921 assert( Data != NULL );
924 /* Is the socket still open? A previous call to Conn_Write()
925 * may have closed the connection due to a fatal error.
926 * In this case it is sufficient to return an error, as well. */
927 if (My_Connections[Idx].sock <= NONE) {
928 LogDebug("Skipped write on closed socket (connection %d).", Idx);
932 /* Make sure that there still exists a CLIENT structure associated
933 * with this connection and check if this is a server or not: */
934 c = Conn_GetClient(Idx);
936 /* Servers do get special write buffer limits, so they can
937 * generate all the messages that are required while peering. */
938 if (Client_Type(c) == CLIENT_SERVER)
939 writebuf_limit = WRITEBUFFER_SLINK_LEN;
941 LogDebug("Write on socket without client (connection %d)!?", Idx);
944 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
946 * Zip_Buffer() does all the dirty work for us: it flushes
947 * the (pre-)compression buffers if required and handles
948 * all error conditions. */
949 if (!Zip_Buffer(Idx, Data, Len))
955 /* Uncompressed link:
956 * Check if outbound buffer has enough space for the data. */
957 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
958 WRITEBUFFER_FLUSH_LEN) {
959 /* Buffer is full, flush it. Handle_Write deals with
960 * low-level errors, if any. */
961 if (!Handle_Write(Idx))
965 /* When the write buffer is still too big after flushing it,
966 * the connection will be killed. */
967 if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
970 "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
971 Idx, writebuf_limit, Len,
972 (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
973 Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
977 /* Copy data to write buffer */
978 if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
981 My_Connections[Idx].bytes_out += Len;
984 /* Adjust global write counter */
991 * Shut down a connection.
993 * @param Idx Connection index.
994 * @param LogMsg Message to write to the log or NULL. If no LogMsg
995 * is given, the FwdMsg is logged.
996 * @param FwdMsg Message to forward to remote servers.
997 * @param InformClient If true, inform the client on the connection which is
998 * to be shut down of the reason (FwdMsg) and send
999 * connection statistics before disconnecting it.
1002 Conn_Close(CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient)
1004 /* Close connection. Open pipes of asynchronous resolver
1005 * sub-processes are closed down. */
1011 double in_z_k, out_z_k;
1015 assert( Idx > NONE );
1017 /* Is this link already shutting down? */
1018 if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
1019 /* Conn_Close() has been called recursively for this link;
1020 * probable reason: Handle_Write() failed -- see below. */
1021 LogDebug("Recursive request to close connection %d!", Idx );
1025 assert( My_Connections[Idx].sock > NONE );
1027 /* Mark link as "closing" */
1028 Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
1030 port = ng_ipaddr_getport(&My_Connections[Idx].addr);
1031 Log(LOG_INFO, "Shutting down connection %d (%s) with \"%s:%d\" ...", Idx,
1032 LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
1034 /* Search client, if any */
1035 c = Conn_GetClient( Idx );
1037 /* Should the client be informed? */
1040 /* Send statistics to client if registered as user: */
1041 if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
1043 ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
1044 Client_ID(Client_ThisServer()), Client_ID(c),
1046 (double)My_Connections[Idx].bytes_in / 1024,
1047 (double)My_Connections[Idx].bytes_out / 1024);
1050 /* Send ERROR to client (see RFC 2812, section 3.1.7) */
1052 Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
1054 Conn_WriteStr(Idx, "ERROR :Closing connection");
1057 /* Try to write out the write buffer. Note: Handle_Write() eventually
1058 * removes the CLIENT structure associated with this connection if an
1059 * error occurs! So we have to re-check if there is still an valid
1060 * CLIENT structure after calling Handle_Write() ...*/
1061 (void)Handle_Write( Idx );
1063 /* Search client, if any (re-check!) */
1064 c = Conn_GetClient( Idx );
1066 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1067 LogDebug("SSL connection %d shutting down ...", Idx);
1068 ConnSSL_Free(&My_Connections[Idx]);
1071 /* Shut down socket */
1072 if (! io_close(My_Connections[Idx].sock)) {
1073 /* Oops, we can't close the socket!? This is ... ugly! */
1075 "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
1076 Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
1077 port, strerror(errno));
1080 /* Mark socket as invalid: */
1081 My_Connections[Idx].sock = NONE;
1083 /* If there is still a client, unregister it now */
1085 Client_Destroy(c, LogMsg, FwdMsg, true);
1087 /* Calculate statistics and log information */
1088 in_k = (double)My_Connections[Idx].bytes_in / 1024;
1089 out_k = (double)My_Connections[Idx].bytes_out / 1024;
1091 if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
1092 in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
1093 out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
1094 /* Make sure that no division by zero can occur during
1095 * the calculation of in_p and out_p: in_z_k and out_z_k
1096 * are non-zero, that's guaranteed by the protocol until
1097 * compression can be enabled. */
1102 in_p = (int)(( in_k * 100 ) / in_z_k );
1103 out_p = (int)(( out_k * 100 ) / out_z_k );
1105 "Connection %d with \"%s:%d\" closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
1106 Idx, My_Connections[Idx].host, port,
1107 in_k, in_z_k, in_p, out_k, out_z_k, out_p);
1113 "Connection %d with \"%s:%d\" closed (in: %.1fk, out: %.1fk).",
1114 Idx, My_Connections[Idx].host, port,
1118 /* Servers: Modify time of next connect attempt? */
1119 Conf_UnsetServer( Idx );
1122 /* Clean up zlib, if link was compressed */
1123 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
1124 inflateEnd( &My_Connections[Idx].zip.in );
1125 deflateEnd( &My_Connections[Idx].zip.out );
1126 array_free(&My_Connections[Idx].zip.rbuf);
1127 array_free(&My_Connections[Idx].zip.wbuf);
1131 array_free(&My_Connections[Idx].rbuf);
1132 array_free(&My_Connections[Idx].wbuf);
1133 if (My_Connections[Idx].pwd != NULL)
1134 free(My_Connections[Idx].pwd);
1136 /* Clean up connection structure (=free it) */
1137 Init_Conn_Struct( Idx );
1139 assert(NumConnections > 0);
1142 LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
1143 Idx, NumConnections, NumConnections != 1 ? "s" : "");
1145 idle_t = NumConnections > 0 ? 0 : time(NULL);
1149 * Get current number of connections.
1151 * @returns Number of current connections.
1156 return NumConnections;
1160 * Get number of maximum simultaneous connections.
1162 * @returns Number of maximum simultaneous connections.
1167 return NumConnectionsMax;
1168 } /* Conn_CountMax */
1171 * Get number of connections accepted since the daemon startet.
1173 * @returns Number of connections accepted.
1176 Conn_CountAccepted(void)
1178 return NumConnectionsAccepted;
1179 } /* Conn_CountAccepted */
1182 * Synchronize established connections and configured server structures
1183 * after a configuration update and store the correct connection IDs, if any.
1186 Conn_SyncServerStruct(void)
1192 for (i = 0; i < Pool_Size; i++) {
1193 if (My_Connections[i].sock == NONE)
1197 client = Conn_GetClient(i);
1198 if (!client || Client_Type(client) != CLIENT_SERVER)
1201 for (c = 0; c < MAX_SERVERS; c++) {
1202 /* Configured server? */
1203 if (!Conf_Server[c].host[0])
1206 if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
1207 Conf_Server[c].conn_id = i;
1210 } /* SyncServerStruct */
1213 * Get IP address string of a connection.
1215 * @param Idx Connection index.
1216 * @return Pointer to a global buffer containing the IP address as string.
1219 Conn_GetIPAInfo(CONN_ID Idx)
1222 return ng_ipaddr_tostr(&My_Connections[Idx].addr);
1226 * Send out data of write buffer; connect new sockets.
1228 * @param Idx Connection index.
1229 * @returns true on success, false otherwise.
1232 Handle_Write( CONN_ID Idx )
1237 assert( Idx > NONE );
1238 if ( My_Connections[Idx].sock < 0 ) {
1239 LogDebug("Handle_Write() on closed socket, connection %d", Idx);
1242 assert( My_Connections[Idx].sock > NONE );
1244 wdatalen = array_bytes(&My_Connections[Idx].wbuf );
1247 if (wdatalen == 0) {
1248 /* Write buffer is empty, so we try to flush the compression
1249 * buffer and get some data to work with from there :-) */
1250 if (!Zip_Flush(Idx))
1253 /* Now the write buffer most probably has changed: */
1254 wdatalen = array_bytes(&My_Connections[Idx].wbuf);
1258 if (wdatalen == 0) {
1259 /* Still no data, fine. */
1260 io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
1266 ("Handle_Write() called for connection %d, %ld bytes pending ...",
1271 if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
1272 len = ConnSSL_Write(&My_Connections[Idx],
1273 array_start(&My_Connections[Idx].wbuf),
1278 len = write(My_Connections[Idx].sock,
1279 array_start(&My_Connections[Idx].wbuf), wdatalen );
1282 if (errno == EAGAIN || errno == EINTR)
1285 if (!Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ISCLOSING))
1287 "Write error on connection %d (socket %d): %s!",
1288 Idx, My_Connections[Idx].sock, strerror(errno));
1290 LogDebug("Recursive write error on connection %d (socket %d): %s!",
1291 Idx, My_Connections[Idx].sock, strerror(errno));
1292 Conn_Close(Idx, "Write error", NULL, false);
1296 /* move any data not yet written to beginning */
1297 array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
1300 } /* Handle_Write */
1303 * Count established connections to a specific IP address.
1305 * @returns Number of established connections.
1308 Count_Connections(ng_ipaddr_t *a)
1313 for (i = 0; i < Pool_Size; i++) {
1314 if (My_Connections[i].sock <= NONE)
1316 if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
1320 } /* Count_Connections */
1323 * Initialize new client connection on a listening socket.
1325 * @param Sock Listening socket descriptor.
1326 * @param IsSSL true if this socket expects SSL-encrypted data.
1327 * @returns Accepted socket descriptor or -1 on error.
1330 New_Connection(int Sock, UNUSED bool IsSSL)
1333 struct request_info req;
1335 ng_ipaddr_t new_addr;
1336 char ip_str[NG_INET_ADDRSTRLEN];
1337 int new_sock, new_sock_len;
1341 assert(Sock > NONE);
1343 LogDebug("Accepting new connection on socket %d ...", Sock);
1345 new_sock_len = (int)sizeof(new_addr);
1346 new_sock = accept(Sock, (struct sockaddr *)&new_addr,
1347 (socklen_t *)&new_sock_len);
1349 Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
1352 NumConnectionsAccepted++;
1354 if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
1355 Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
1356 Simple_Message(new_sock, "ERROR :Internal Server Error");
1362 /* Validate socket using TCP Wrappers */
1363 request_init(&req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock,
1364 RQ_CLIENT_SIN, &new_addr, NULL);
1366 if (!hosts_access(&req)) {
1368 "Refused connection from %s (by TCP Wrappers)!", ip_str);
1369 Simple_Message(new_sock, "ERROR :Connection refused");
1375 if (!Init_Socket(new_sock))
1378 /* Check global connection limit */
1379 if ((Conf_MaxConnections > 0) &&
1380 (NumConnections >= (size_t) Conf_MaxConnections)) {
1381 Log(LOG_ALERT, "Can't accept connection: limit (%d) reached!",
1382 Conf_MaxConnections);
1383 Simple_Message(new_sock, "ERROR :Connection limit reached");
1388 /* Check IP-based connection limit */
1389 cnt = Count_Connections(&new_addr);
1390 if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
1391 /* Access denied, too many connections from this IP address! */
1393 "Refused connection from %s: too may connections (%ld) from this IP address!",
1395 Simple_Message(new_sock,
1396 "ERROR :Connection refused, too many connections from your IP address");
1401 if (new_sock >= Pool_Size) {
1402 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
1403 (size_t) new_sock)) {
1405 "Can't allocate memory! [New_Connection]");
1406 Simple_Message(new_sock, "ERROR: Internal error");
1410 LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
1411 new_sock, array_length(&My_ConnArray,
1412 sizeof(CONNECTION)), array_bytes(&My_ConnArray));
1414 /* Adjust pointer to new block */
1415 My_Connections = array_start(&My_ConnArray);
1416 while (Pool_Size <= new_sock)
1417 Init_Conn_Struct(Pool_Size++);
1420 /* register callback */
1421 if (!io_event_create(new_sock, IO_WANTREAD, cb_clientserver)) {
1423 "Can't accept connection: io_event_create failed!");
1424 Simple_Message(new_sock, "ERROR :Internal error");
1429 c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
1432 "Can't accept connection: can't create client structure!");
1433 Simple_Message(new_sock, "ERROR :Internal error");
1438 Init_Conn_Struct(new_sock);
1439 My_Connections[new_sock].sock = new_sock;
1440 My_Connections[new_sock].addr = new_addr;
1441 My_Connections[new_sock].client = c;
1443 /* Set initial hostname to IP address. This becomes overwritten when
1444 * the DNS lookup is enabled and succeeds, but is used otherwise. */
1445 if (ng_ipaddr_af(&new_addr) != AF_INET)
1446 snprintf(My_Connections[new_sock].host,
1447 sizeof(My_Connections[new_sock].host), "[%s]", ip_str);
1449 strlcpy(My_Connections[new_sock].host, ip_str,
1450 sizeof(My_Connections[new_sock].host));
1452 Client_SetHostname(c, My_Connections[new_sock].host);
1454 Log(LOG_INFO, "Accepted connection %d from \"%s:%d\" on socket %d.",
1455 new_sock, My_Connections[new_sock].host,
1456 ng_ipaddr_getport(&new_addr), Sock);
1457 Account_Connection();
1460 /* Delay connection initalization until SSL handshake is finished */
1463 Conn_StartLogin(new_sock);
1466 } /* New_Connection */
1469 * Finish connection initialization, start resolver subprocess.
1471 * @param Idx Connection index.
1474 Conn_StartLogin(CONN_ID Idx)
1476 int ident_sock = -1;
1480 /* Nothing to do if DNS (and resolver subprocess) is disabled */
1485 /* Should we make an IDENT request? */
1487 ident_sock = My_Connections[Idx].sock;
1490 if (Conf_NoticeAuth) {
1491 /* Send "NOTICE AUTH" messages to the client */
1494 (void)Conn_WriteStr(Idx,
1495 "NOTICE AUTH :*** Looking up your hostname and checking ident");
1498 (void)Conn_WriteStr(Idx,
1499 "NOTICE AUTH :*** Looking up your hostname");
1500 /* Send buffered data to the client, but break on errors
1501 * because Handle_Write() would have closed the connection
1502 * again in this case! */
1503 if (!Handle_Write(Idx))
1507 Resolve_Addr(&My_Connections[Idx].proc_stat, &My_Connections[Idx].addr,
1508 ident_sock, cb_Read_Resolver_Result);
1512 * Update global connection counters.
1515 Account_Connection(void)
1519 if (NumConnections > NumConnectionsMax)
1520 NumConnectionsMax = NumConnections;
1521 LogDebug("Total number of connections now %lu (max %lu).",
1522 NumConnections, NumConnectionsMax);
1523 } /* Account_Connection */
1526 * Translate socket handle into connection index.
1528 * @param Sock Socket handle.
1529 * @returns Connecion index or NONE, if no connection could be found.
1532 Socket2Index( int Sock )
1534 assert( Sock >= 0 );
1536 if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
1537 /* the Connection was already closed again, likely due to
1539 LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
1543 } /* Socket2Index */
1546 * Read data from the network to the read buffer. If an error occurs,
1547 * the socket of this connection will be shut down.
1549 * @param Idx Connection index.
1552 Read_Request( CONN_ID Idx )
1555 static const unsigned int maxbps = COMMAND_LEN / 2;
1556 char readbuf[READBUFFER_LEN];
1559 assert( Idx > NONE );
1560 assert( My_Connections[Idx].sock > NONE );
1563 if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
1564 (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
1566 if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
1569 /* Read buffer is full */
1571 "Receive buffer space exhausted (connection %d): %d/%d bytes",
1572 Idx, array_bytes(&My_Connections[Idx].rbuf), READBUFFER_LEN);
1573 Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
1578 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
1579 len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
1582 len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
1584 LogDebug("Client \"%s:%u\" is closing connection %d ...",
1585 My_Connections[Idx].host,
1586 ng_ipaddr_tostr(&My_Connections[Idx].addr), Idx);
1587 Conn_Close(Idx, NULL, "Client closed connection", false);
1592 if( errno == EAGAIN ) return;
1593 Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
1594 Idx, My_Connections[Idx].sock, strerror(errno));
1595 Conn_Close(Idx, "Read error", "Client closed connection",
1600 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1601 if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
1604 "Could not append received data to zip input buffer (connection %d): %d bytes!",
1606 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1613 if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
1615 "Could not append received data to input buffer (connection %d): %d bytes!",
1617 Conn_Close(Idx, "Receive buffer space exhausted", NULL,
1622 /* Update connection statistics */
1623 My_Connections[Idx].bytes_in += len;
1625 /* Handle read buffer */
1626 My_Connections[Idx].bps += Handle_Buffer(Idx);
1628 /* Make sure that there is still a valid client registered */
1629 c = Conn_GetClient(Idx);
1633 /* Update timestamp of last data received if this connection is
1634 * registered as a user, server or service connection. Don't update
1635 * otherwise, so users have at least Conf_PongTimeout seconds time to
1636 * register with the IRC server -- see Check_Connections().
1637 * Update "lastping", too, if time shifted backwards ... */
1638 if (Client_Type(c) == CLIENT_USER
1639 || Client_Type(c) == CLIENT_SERVER
1640 || Client_Type(c) == CLIENT_SERVICE) {
1642 if (My_Connections[Idx].lastdata != t)
1643 My_Connections[Idx].bps = 0;
1645 My_Connections[Idx].lastdata = t;
1646 if (My_Connections[Idx].lastping > t)
1647 My_Connections[Idx].lastping = t;
1650 /* Look at the data in the (read-) buffer of this connection */
1651 if (My_Connections[Idx].bps >= maxbps)
1652 Throttle_Connection(Idx, c, THROTTLE_BPS, maxbps);
1653 } /* Read_Request */
1656 * Handle all data in the connection read-buffer.
1658 * Data is processed until no complete command is left in the read buffer,
1659 * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
1660 * When a fatal error occurs, the connection is shut down.
1662 * @param Idx Index of the connection.
1663 * @returns Number of bytes processed.
1666 Handle_Buffer(CONN_ID Idx)
1669 char *ptr1, *ptr2, *first_eol;
1677 unsigned int i, maxcmd = MAX_COMMANDS, len_processed = 0;
1680 c = Conn_GetClient(Idx);
1681 starttime = time(NULL);
1685 /* Servers get special command limits that depend on the user count */
1686 switch (Client_Type(c)) {
1688 maxcmd = (int)(Client_UserCount() / 5)
1689 + MAX_COMMANDS_SERVER_MIN;
1690 /* Allow servers to handle even more commands while peering
1691 * to speed up server login and network synchronization. */
1692 if (Conn_LastPing(Idx) == 0)
1695 case CLIENT_SERVICE:
1696 maxcmd = MAX_COMMANDS_SERVICE;
1699 if (Client_HasMode(c, 'F'))
1700 maxcmd = MAX_COMMANDS_SERVICE;
1704 for (i=0; i < maxcmd; i++) {
1706 if (My_Connections[Idx].delaytime > starttime)
1709 /* Unpack compressed data, if compression is in use */
1710 if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
1711 /* When unzipping fails, Unzip_Buffer() shuts
1712 * down the connection itself */
1713 if (!Unzip_Buffer(Idx))
1718 if (0 == array_bytes(&My_Connections[Idx].rbuf))
1721 /* Make sure that the buffer is NULL terminated */
1722 if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
1723 Conn_Close(Idx, NULL,
1724 "Can't allocate memory [Handle_Buffer]",
1729 /* RFC 2812, section "2.3 Messages", 5th paragraph:
1730 * "IRC messages are always lines of characters terminated
1731 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
1733 ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
1736 /* Check for non-RFC-compliant request (only CR or LF)?
1737 * Unfortunately, there are quite a few clients out there
1738 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
1739 ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
1740 ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
1742 /* Check if there is a single CR or LF _before_ the
1743 * correct CR+LF line terminator: */
1744 first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
1745 if (first_eol < ptr) {
1746 /* Single CR or LF before CR+LF found */
1750 } else if (ptr1 || ptr2) {
1751 /* No CR+LF terminated command found, but single
1752 * CR or LF found ... */
1754 ptr = ptr1 < ptr2 ? ptr1 : ptr2;
1756 ptr = ptr1 ? ptr1 : ptr2;
1764 /* Complete (=line terminated) request found, handle it! */
1767 len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
1769 if (len > (COMMAND_LEN - 1)) {
1770 /* Request must not exceed 512 chars (incl. CR+LF!),
1771 * see RFC 2812. Disconnect Client if this happens. */
1773 "Request too long (connection %d): %d bytes (max. %d expected)!",
1774 Idx, array_bytes(&My_Connections[Idx].rbuf),
1776 Conn_Close(Idx, NULL, "Request too long", true);
1780 len_processed += (unsigned int)len;
1782 /* Request is empty (only '\r\n', '\r' or '\n');
1783 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
1784 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1788 /* remember if stream is already compressed */
1789 old_z = My_Connections[Idx].options & CONN_ZIP;
1792 My_Connections[Idx].msg_in++;
1794 (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
1795 return 0; /* error -> connection has been closed */
1797 array_moveleft(&My_Connections[Idx].rbuf, 1, len);
1799 if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
1800 (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
1801 /* The last command activated socket compression.
1802 * Data that was read after that needs to be copied
1803 * to the unzip buffer for decompression: */
1805 (&My_Connections[Idx].zip.rbuf,
1806 &My_Connections[Idx].rbuf)) {
1807 Conn_Close(Idx, NULL,
1808 "Can't allocate memory [Handle_Buffer]",
1813 array_trunc(&My_Connections[Idx].rbuf);
1815 ("Moved already received data (%u bytes) to uncompression buffer.",
1816 array_bytes(&My_Connections[Idx].zip.rbuf));
1821 LogDebug("Connection %d: Processed %ld commands (max=%ld), %ld bytes. %ld bytes left in read buffer.",
1822 Idx, i, maxcmd, len_processed,
1823 array_bytes(&My_Connections[Idx].rbuf));
1826 /* If data has been processed but there is still data in the read
1827 * buffer, the command limit triggered. Enforce the penalty time: */
1828 if (len_processed && array_bytes(&My_Connections[Idx].rbuf) > 2)
1829 Throttle_Connection(Idx, c, THROTTLE_CMDS, maxcmd);
1831 return len_processed;
1832 } /* Handle_Buffer */
1835 * Check whether established connections are still alive or not.
1836 * If not, play PING-PONG first; and if that doesn't help either,
1837 * disconnect the respective peer.
1840 Check_Connections(void)
1846 for (i = 0; i < Pool_Size; i++) {
1847 if (My_Connections[i].sock < 0)
1850 c = Conn_GetClient(i);
1851 if (c && ((Client_Type(c) == CLIENT_USER)
1852 || (Client_Type(c) == CLIENT_SERVER)
1853 || (Client_Type(c) == CLIENT_SERVICE))) {
1854 /* connected User, Server or Service */
1855 if (My_Connections[i].lastping >
1856 My_Connections[i].lastdata) {
1857 /* We already sent a ping */
1858 if (My_Connections[i].lastping <
1859 time(NULL) - Conf_PongTimeout) {
1861 snprintf(msg, sizeof(msg),
1862 "Ping timeout: %d seconds",
1864 LogDebug("Connection %d: %s.", i, msg);
1865 Conn_Close(i, NULL, msg, true);
1867 } else if (My_Connections[i].lastdata <
1868 time(NULL) - Conf_PingTimeout) {
1869 /* We need to send a PING ... */
1870 LogDebug("Connection %d: sending PING ...", i);
1872 Conn_WriteStr(i, "PING :%s",
1873 Client_ID(Client_ThisServer()));
1876 /* The connection is not fully established yet, so
1877 * we don't do the PING-PONG game here but instead
1878 * disconnect the client after "a short time" if it's
1879 * still not registered. */
1881 if (My_Connections[i].lastdata <
1882 time(NULL) - Conf_PongTimeout) {
1884 ("Unregistered connection %d timed out ...",
1886 Conn_Close(i, NULL, "Timeout", false);
1890 } /* Check_Connections */
1893 * Check if further server links should be established.
1901 time_now = time(NULL);
1903 /* Check all configured servers */
1904 for (i = 0; i < MAX_SERVERS; i++) {
1905 if (Conf_Server[i].conn_id != NONE)
1906 continue; /* Already establishing or connected */
1907 if (!Conf_Server[i].host[0] || Conf_Server[i].port <= 0)
1908 continue; /* No host and/or port configured */
1909 if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
1910 continue; /* Disabled configuration entry */
1911 if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
1912 continue; /* We have to wait a little bit ... */
1914 /* Is there already a connection in this group? */
1915 if (Conf_Server[i].group > NONE) {
1916 for (n = 0; n < MAX_SERVERS; n++) {
1919 if ((Conf_Server[n].conn_id != NONE) &&
1920 (Conf_Server[n].group == Conf_Server[i].group))
1923 if (n < MAX_SERVERS)
1927 /* Okay, try to connect now */
1929 "Preparing to establish a new server link for \"%s\" ...",
1930 Conf_Server[i].name);
1931 Conf_Server[i].lasttry = time_now;
1932 Conf_Server[i].conn_id = SERVER_WAIT;
1933 assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
1934 Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
1935 cb_Connect_to_Server);
1937 } /* Check_Servers */
1940 * Establish a new outgoing server connection.
1942 * @param Server Configuration index of the server.
1943 * @param dest Destination IP address to connect to.
1946 New_Server( int Server , ng_ipaddr_t *dest)
1948 /* Establish new server link */
1949 char ip_str[NG_INET_ADDRSTRLEN];
1950 int af_dest, res, new_sock;
1953 assert( Server > NONE );
1955 /* Make sure that the remote server hasn't re-linked to this server
1956 * asynchronously on its own */
1957 if (Conf_Server[Server].conn_id > NONE) {
1959 "Connection to \"%s\" meanwhile re-established, aborting preparation.");
1963 if (!ng_ipaddr_tostr_r(dest, ip_str)) {
1964 Log(LOG_WARNING, "New_Server: Could not convert IP to string");
1965 Conf_Server[Server].conn_id = NONE;
1969 af_dest = ng_ipaddr_af(dest);
1970 new_sock = socket(af_dest, SOCK_STREAM, 0);
1973 "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
1974 Conf_Server[Server].name, Conf_Server[Server].host,
1975 Conf_Server[Server].port, ip_str, new_sock);
1978 Log(LOG_CRIT, "Can't create socket (af %d): %s!",
1979 af_dest, strerror(errno));
1980 Conf_Server[Server].conn_id = NONE;
1984 if (!Init_Socket(new_sock)) {
1985 Conf_Server[Server].conn_id = NONE;
1989 /* is a bind address configured? */
1990 res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
1992 /* if yes, bind now. If it fails, warn and let connect() pick a
1994 if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
1995 ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
1997 ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
1998 Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str,
2001 ng_ipaddr_setport(dest, Conf_Server[Server].port);
2002 res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
2003 if(( res != 0 ) && ( errno != EINPROGRESS )) {
2004 Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
2006 Conf_Server[Server].conn_id = NONE;
2010 if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
2012 "Cannot allocate memory for server connection (socket %d)",
2015 Conf_Server[Server].conn_id = NONE;
2019 if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
2020 Log(LOG_ALERT, "io_event_create(): could not add fd %d",
2023 Conf_Server[Server].conn_id = NONE;
2027 My_Connections = array_start(&My_ConnArray);
2029 assert(My_Connections[new_sock].sock <= 0);
2031 Init_Conn_Struct(new_sock);
2033 ng_ipaddr_tostr_r(dest, ip_str);
2034 c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
2036 Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
2038 Conf_Server[Server].conn_id = NONE;
2042 /* Conn_Close() decrements this counter again */
2043 Account_Connection();
2044 Client_SetIntroducer( c, c );
2045 Client_SetToken( c, TOKEN_OUTBOUND );
2047 /* Register connection */
2048 if (!Conf_SetServer(Server, new_sock))
2050 My_Connections[new_sock].sock = new_sock;
2051 My_Connections[new_sock].addr = *dest;
2052 My_Connections[new_sock].client = c;
2053 strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
2054 sizeof(My_Connections[new_sock].host ));
2057 if (Conf_Server[Server].SSLConnect &&
2058 !ConnSSL_PrepareConnect(&My_Connections[new_sock], &Conf_Server[Server]))
2060 Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
2061 Conn_Close(new_sock, "Could not initialize SSL for outgoing connection",
2063 Init_Conn_Struct(new_sock);
2064 Conf_Server[Server].conn_id = NONE;
2068 LogDebug("Registered new connection %d on socket %d (%ld in total).",
2069 new_sock, My_Connections[new_sock].sock, NumConnections);
2070 Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
2074 * Initialize connection structure.
2076 * @param Idx Connection index.
2079 Init_Conn_Struct(CONN_ID Idx)
2081 time_t now = time(NULL);
2083 memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
2084 My_Connections[Idx].sock = -1;
2085 My_Connections[Idx].signon = now;
2086 My_Connections[Idx].lastdata = now;
2087 My_Connections[Idx].lastprivmsg = now;
2088 Proc_InitStruct(&My_Connections[Idx].proc_stat);
2091 My_Connections[Idx].iconv_from = (iconv_t)(-1);
2092 My_Connections[Idx].iconv_to = (iconv_t)(-1);
2094 } /* Init_Conn_Struct */
2097 * Initialize options of a new socket.
2099 * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
2100 * The socket is automatically closed if a fatal error is encountered.
2102 * @param Sock Socket handle.
2103 * @returns false if socket was closed due to fatal error.
2106 Init_Socket( int Sock )
2110 if (!io_setnonblock(Sock)) {
2111 Log(LOG_CRIT, "Can't enable non-blocking mode for socket: %s!",
2117 /* Don't block this port after socket shutdown */
2119 if (setsockopt(Sock, SOL_SOCKET, SO_REUSEADDR, &value,
2120 (socklen_t)sizeof(value)) != 0) {
2121 Log(LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!",
2123 /* ignore this error */
2126 /* Set type of service (TOS) */
2127 #if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
2128 value = IPTOS_LOWDELAY;
2129 if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
2130 (socklen_t) sizeof(value))) {
2131 LogDebug("Can't set socket option IP_TOS: %s!",
2133 /* ignore this error */
2135 LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
2143 * Read results of a resolver sub-process and try to initiate a new server
2146 * @param fd File descriptor of the pipe to the sub-process.
2147 * @param events (ignored IO specification)
2150 cb_Connect_to_Server(int fd, UNUSED short events)
2155 /* we can handle at most 3 addresses; but we read up to 4 so we can
2156 * log the 'more than we can handle' condition. First result is tried
2157 * immediately, rest is saved for later if needed. */
2158 ng_ipaddr_t dest_addrs[4];
2160 LogDebug("Resolver: Got forward lookup callback on fd %d, events %d",
2163 for (i=0; i < MAX_SERVERS; i++) {
2164 if (Proc_GetPipeFd(&Conf_Server[i].res_stat) == fd )
2168 if( i >= MAX_SERVERS) {
2169 /* Ops, no matching server found?! */
2171 LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
2175 /* Read result from pipe */
2176 len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
2177 Proc_Close(&Conf_Server[i].res_stat);
2179 /* Error resolving hostname: reset server structure */
2180 Conf_Server[i].conn_id = NONE;
2184 assert((len % sizeof(ng_ipaddr_t)) == 0);
2186 LogDebug("Got result from resolver: %u structs (%u bytes).",
2187 len/sizeof(ng_ipaddr_t), len);
2189 memset(&Conf_Server[i].dst_addr, 0, sizeof(Conf_Server[i].dst_addr));
2190 if (len > sizeof(ng_ipaddr_t)) {
2191 /* more than one address for this hostname, remember them
2192 * in case first address is unreachable/not available */
2193 len -= sizeof(ng_ipaddr_t);
2194 if (len > sizeof(Conf_Server[i].dst_addr)) {
2195 len = sizeof(Conf_Server[i].dst_addr);
2197 "Notice: Resolver returned more IP Addresses for host than we can handle, additional addresses dropped.");
2199 memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
2202 New_Server(i, dest_addrs);
2203 } /* cb_Read_Forward_Lookup */
2206 * Read results of a resolver sub-process from the pipe and update the
2207 * appropriate connection/client structure(s): hostname and/or IDENT user name.
2209 * @param r_fd File descriptor of the pipe to the sub-process.
2210 * @param events (ignored IO specification)
2213 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
2220 char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
2223 char readbuf[HOST_LEN + 1];
2226 LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
2227 i = Conn_GetFromProc(r_fd);
2229 /* Ops, none found? Probably the connection has already
2230 * been closed!? We'll ignore that ... */
2232 LogDebug("Resolver: Got callback for unknown connection!?");
2236 /* Read result from pipe */
2237 len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
2238 Proc_Close(&My_Connections[i].proc_stat);
2242 readbuf[len] = '\0';
2243 identptr = strchr(readbuf, '\n');
2244 assert(identptr != NULL);
2246 Log( LOG_CRIT, "Resolver: Got malformed result!");
2251 LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
2252 /* Okay, we got a complete result: this is a host name for outgoing
2253 * connections and a host name and IDENT user name (if enabled) for
2254 * incoming connections.*/
2255 assert ( My_Connections[i].sock >= 0 );
2256 /* Incoming connection. Search client ... */
2257 c = Conn_GetClient( i );
2258 assert( c != NULL );
2260 /* Only update client information of unregistered clients.
2261 * Note: user commands (e. g. WEBIRC) are always read _after_ reading
2262 * the resolver results, so we don't have to worry to override settings
2263 * from these commands here. */
2264 if(Client_Type(c) == CLIENT_UNKNOWN) {
2265 strlcpy(My_Connections[i].host, readbuf,
2266 sizeof(My_Connections[i].host));
2267 Client_SetHostname(c, readbuf);
2268 if (Conf_NoticeAuth)
2269 (void)Conn_WriteStr(i,
2270 "NOTICE AUTH :*** Found your hostname: %s",
2271 My_Connections[i].host);
2277 if ((*ptr < '0' || *ptr > '9') &&
2278 (*ptr < 'A' || *ptr > 'Z') &&
2279 (*ptr < 'a' || *ptr > 'z'))
2284 /* Erroneous IDENT reply */
2286 "Got invalid IDENT reply for connection %d! Ignored.",
2290 "IDENT lookup for connection %d: \"%s\".",
2292 Client_SetUser(c, identptr, true);
2294 if (Conf_NoticeAuth) {
2295 (void)Conn_WriteStr(i,
2296 "NOTICE AUTH :*** Got %sident response%s%s",
2297 *ptr ? "invalid " : "",
2299 *ptr ? "" : identptr);
2301 } else if(Conf_Ident) {
2302 Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
2303 if (Conf_NoticeAuth)
2304 (void)Conn_WriteStr(i,
2305 "NOTICE AUTH :*** No ident response");
2309 if (Conf_NoticeAuth) {
2310 /* Send buffered data to the client, but break on
2311 * errors because Handle_Write() would have closed
2312 * the connection again in this case! */
2313 if (!Handle_Write(i))
2317 Class_HandleServerBans(c);
2321 LogDebug("Resolver: discarding result for already registered connection %d.", i);
2323 } /* cb_Read_Resolver_Result */
2326 * Write a "simple" (error) message to a socket.
2328 * The message is sent without using the connection write buffers, without
2329 * compression/encryption, and even without any error reporting. It is
2330 * designed for error messages of e.g. New_Connection().
2332 * @param Sock Socket handle.
2333 * @param Msg Message string to send.
2336 Simple_Message(int Sock, const char *Msg)
2338 char buf[COMMAND_LEN];
2341 assert(Sock > NONE);
2342 assert(Msg != NULL);
2344 strlcpy(buf, Msg, sizeof buf - 2);
2345 len = strlcat(buf, "\r\n", sizeof buf);
2346 if (write(Sock, buf, len) < 0) {
2347 /* Because this function most probably got called to log
2348 * an error message, any write error is ignored here to
2349 * avoid an endless loop. But casting the result of write()
2350 * to "void" doesn't satisfy the GNU C code attribute
2351 * "warn_unused_result" which is used by some versions of
2352 * glibc (e.g. 2.11.1), therefore this silly error
2353 * "handling" code here :-( */
2356 } /* Simple_Error */
2359 * Get CLIENT structure that belongs to a local connection identified by its
2360 * index number. Each connection belongs to a client by definition, so it is
2361 * not required that the caller checks for NULL return values.
2363 * @param Idx Connection index number.
2364 * @returns Pointer to CLIENT structure.
2367 Conn_GetClient( CONN_ID Idx )
2372 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2374 return c ? c->client : NULL;
2378 * Get PROC_STAT sub-process structure of a connection.
2380 * @param Idx Connection index number.
2381 * @returns PROC_STAT structure.
2384 Conn_GetProcStat(CONN_ID Idx)
2389 c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
2391 return &c->proc_stat;
2392 } /* Conn_GetProcStat */
2395 * Get CONN_ID from file descriptor associated to a subprocess structure.
2397 * @param fd File descriptor.
2398 * @returns CONN_ID or NONE (-1).
2401 Conn_GetFromProc(int fd)
2406 for (i = 0; i < Pool_Size; i++) {
2407 if ((My_Connections[i].sock != NONE)
2408 && (Proc_GetPipeFd(&My_Connections[i].proc_stat) == fd))
2412 } /* Conn_GetFromProc */
2415 * Throttle a connection because of excessive usage.
2417 * @param Reason The reason, see THROTTLE_xxx constants.
2418 * @param Idx The connection index.
2419 * @param Client The client of this connection.
2420 * @param Seconds The time to delay this connection.
2423 Throttle_Connection(const CONN_ID Idx, CLIENT *Client, const int Reason,
2427 assert(Client != NULL);
2429 /* Never throttle servers or services, only interrupt processing */
2430 if (Client_Type(Client) == CLIENT_SERVER
2431 || Client_Type(Client) == CLIENT_UNKNOWNSERVER
2432 || Client_Type(Client) == CLIENT_SERVICE)
2435 /* Don't throttle clients with user mode 'F' set */
2436 if (Client_HasMode(Client, 'F'))
2439 LogDebug("Throttling connection %d: code %d, value %d!", Idx,
2441 Conn_SetPenalty(Idx, 1);
2447 Conn_GetAuthPing(CONN_ID Idx)
2449 assert (Idx != NONE);
2450 return My_Connections[Idx].auth_ping;
2451 } /* Conn_GetAuthPing */
2454 Conn_SetAuthPing(CONN_ID Idx, long ID)
2456 assert (Idx != NONE);
2457 My_Connections[Idx].auth_ping = ID;
2458 } /* Conn_SetAuthPing */
2460 #endif /* STRICT_RFC */
2465 * IO callback for new SSL-enabled client and server connections.
2467 * @param sock Socket descriptor.
2468 * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
2471 cb_clientserver_ssl(int sock, UNUSED short what)
2473 CONN_ID idx = Socket2Index(sock);
2482 switch (ConnSSL_Accept(&My_Connections[idx])) {
2486 return; /* EAGAIN: callback will be invoked again by IO layer */
2489 "SSL accept error, closing socket", "SSL accept error",
2494 io_event_setcb(sock, cb_clientserver); /* SSL handshake completed */
2498 * IO callback for listening SSL sockets: handle new connections. This callback
2499 * gets called when a new SSL-enabled connection should be accepted.
2501 * @param sock Socket descriptor.
2502 * @param irrelevant (ignored IO specification)
2505 cb_listen_ssl(int sock, short irrelevant)
2510 fd = New_Connection(sock, true);
2513 io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
2517 * IO callback for new outgoing SSL-enabled server connections.
2519 * @param sock Socket descriptor.
2520 * @param unused (ignored IO specification)
2523 cb_connserver_login_ssl(int sock, short unused)
2525 CONN_ID idx = Socket2Index(sock);
2533 switch (ConnSSL_Connect( &My_Connections[idx])) {
2535 case 0: LogDebug("ConnSSL_Connect: not ready");
2538 Log(LOG_ERR, "SSL connection on socket %d failed!", sock);
2539 Conn_Close(idx, "Can't connect", NULL, false);
2543 Log( LOG_INFO, "SSL connection %d with \"%s:%d\" established.", idx,
2544 My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
2551 * Check if SSL library needs to read SSL-protocol related data.
2553 * SSL/TLS connections require extra treatment:
2554 * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
2555 * need to take care of that first, before checking read/write buffers.
2556 * For instance, while we might have data in our write buffer, the
2557 * TLS/SSL protocol might need to read internal data first for TLS/SSL
2558 * writes to succeed.
2560 * If this function returns true, such a condition is met and we have
2561 * to reverse the condition (check for read even if we've data to write,
2562 * do not check for read but writeability even if write-buffer is empty).
2564 * @param c Connection to check.
2565 * @returns true if SSL-library has to read protocol data.
2568 SSL_WantRead(const CONNECTION *c)
2570 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
2571 io_event_add(c->sock, IO_WANTREAD);
2578 * Check if SSL library needs to write SSL-protocol related data.
2580 * Please see description of SSL_WantRead() for full description!
2582 * @param c Connection to check.
2583 * @returns true if SSL-library has to write protocol data.
2586 SSL_WantWrite(const CONNECTION *c)
2588 if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
2589 io_event_add(c->sock, IO_WANTWRITE);
2596 * Get information about used SSL cipher.
2598 * @param Idx Connection index number.
2599 * @param buf Buffer for returned information text.
2600 * @param len Size of return buffer "buf".
2601 * @returns true on success, false otherwise.
2604 Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
2608 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2609 return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
2613 * Check if a connection is SSL-enabled or not.
2615 * @param Idx Connection index number.
2616 * @return true if connection is SSL-enabled, false otherwise.
2619 Conn_UsesSSL(CONN_ID Idx)
2623 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2624 return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
2628 Conn_GetCertFp(CONN_ID Idx)
2632 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2633 return ConnSSL_GetCertFp(&My_Connections[Idx]);
2637 Conn_SetCertFp(CONN_ID Idx, const char *fingerprint)
2641 assert(Idx < (int) array_length(&My_ConnArray, sizeof(CONNECTION)));
2642 return ConnSSL_SetCertFp(&My_Connections[Idx], fingerprint);
2645 #else /* SSL_SUPPORT */
2648 Conn_UsesSSL(UNUSED CONN_ID Idx)
2654 Conn_GetCertFp(UNUSED CONN_ID Idx)
2660 Conn_SetCertFp(UNUSED CONN_ID Idx, UNUSED const char *fingerprint)
2665 #endif /* SSL_SUPPORT */
2670 * Dump internal state of the "connection module".
2673 Conn_DebugDump(void)
2677 Log(LOG_DEBUG, "Connection status:");
2678 for (i = 0; i < Pool_Size; i++) {
2679 if (My_Connections[i].sock == NONE)
2682 " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
2683 My_Connections[i].sock, My_Connections[i].host,
2684 My_Connections[i].lastdata, My_Connections[i].lastping,
2685 My_Connections[i].delaytime, My_Connections[i].flag,
2686 My_Connections[i].options, My_Connections[i].bps,
2687 My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
2689 } /* Conn_DumpClients */