2 * IRC - Internet Relay Chat, ircd/s_bsd.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * @brief Functions that now (or in the past) relied on BSD APIs.
22 * @version $Id: s_bsd.c,v 1.80.2.1 2006/03/14 03:45:52 entrope Exp $
32 #include "ircd_alloc.h"
34 #include "ircd_features.h"
35 #include "ircd_osdep.h"
36 #include "ircd_reply.h"
37 #include "ircd_snprintf.h"
38 #include "ircd_string.h"
48 #include "querycmds.h"
61 /* #include <assert.h> -- Now using assert in ircd_log.h */
68 #include <sys/ioctl.h>
69 #include <sys/socket.h>
71 #include <sys/utsname.h>
74 /** Array of my own clients, indexed by file descriptor. */
75 struct Client
* LocalClientArray
[MAXCONNECTIONS
];
76 /** Maximum file descriptor in current use. */
78 /** Default local address for outbound IPv4 connections. */
79 struct irc_sockaddr VirtualHost_v4
;
80 /** Default local address for outbound IPv6 connections. */
81 struct irc_sockaddr VirtualHost_v6
;
82 /** Temporary buffer for reading data from a peer. */
83 static char readbuf
[SERVER_TCP_WINDOW
];
86 * report_error text constants
88 const char* const ACCEPT_ERROR_MSG
= "error accepting connection for %s: %s";
89 const char* const BIND_ERROR_MSG
= "bind error for %s: %s";
90 const char* const CONNECT_ERROR_MSG
= "connect to host %s failed: %s";
91 const char* const CONNLIMIT_ERROR_MSG
= "connect limit exceeded for %s: %s";
92 const char* const LISTEN_ERROR_MSG
= "listen error for %s: %s";
93 const char* const NONB_ERROR_MSG
= "error setting non-blocking for %s: %s";
94 const char* const PEERNAME_ERROR_MSG
= "getpeername failed for %s: %s";
95 const char* const POLL_ERROR_MSG
= "poll error for %s: %s";
96 const char* const REGISTER_ERROR_MSG
= "registering %s: %s";
97 const char* const REUSEADDR_ERROR_MSG
= "error setting SO_REUSEADDR for %s: %s";
98 const char* const SELECT_ERROR_MSG
= "select error for %s: %s";
99 const char* const SETBUFS_ERROR_MSG
= "error setting buffer size for %s: %s";
100 const char* const SOCKET_ERROR_MSG
= "error creating socket for %s: %s";
101 const char* const TOS_ERROR_MSG
= "error setting TOS for %s: %s";
104 static void client_sock_callback(struct Event
* ev
);
105 static void client_timer_callback(struct Event
* ev
);
109 * Cannot use perror() within daemon. stderr is closed in
110 * ircd and cannot be used. And, worse yet, it might have
111 * been reassigned to a normal connection...
114 /** Replacement for perror(). Record error to log. Send a copy to all
115 * *LOCAL* opers, but only if no errors were sent to them in the last
117 * @param text A *format* string for outputting error. It must contain
118 * only two '%s', the first will be replaced by the sockhost from the
119 * cptr, and the latter will be taken from sys_errlist[errno].
120 * @param who The client associated with the error.
121 * @param err The errno value to display.
123 void report_error(const char* text
, const char* who
, int err
)
125 static time_t last_notice
= 0;
126 int errtmp
= errno
; /* debug may change 'errno' */
127 const char* errmsg
= (err
) ? strerror(err
) : "";
130 errmsg
= "Unknown error";
132 if (EmptyString(who
))
135 if (last_notice
+ 20 < CurrentTime
) {
137 * pace error messages so opers don't get flooded by transients
139 sendto_opmask_butone(0, SNO_OLDSNO
, text
, who
, errmsg
);
140 last_notice
= CurrentTime
;
142 log_write(LS_SOCKET
, L_ERROR
, 0, text
, who
, errmsg
);
147 /** Called when resolver query finishes. If the DNS lookup was
148 * successful, start the connection; otherwise notify opers of the
150 * @param vptr The struct ConfItem representing the Connect block.
151 * @param hp A pointer to the DNS lookup results (NULL on failure).
153 static void connect_dns_callback(void* vptr
, const struct irc_in_addr
*addr
, const char *h_name
)
155 struct ConfItem
* aconf
= (struct ConfItem
*) vptr
;
157 aconf
->dns_pending
= 0;
159 memcpy(&aconf
->address
, addr
, sizeof(aconf
->address
));
160 connect_server(aconf
, 0);
163 sendto_opmask_butone(0, SNO_OLDSNO
, "Connect to %s failed: host lookup",
167 /** Closes all file descriptors.
168 * @param close_stderr If non-zero, also close stderr.
170 void close_connections(int close_stderr
)
179 for (i
= 3; i
< MAXCONNECTIONS
; ++i
)
183 /** Initialize process fd limit to MAXCONNECTIONS.
185 int init_connection_limits(void)
187 int limit
= os_set_fdlimit(MAXCONNECTIONS
);
191 fprintf(stderr
, "error setting max fd's to %d\n", limit
);
193 else if (limit
> 0) {
194 fprintf(stderr
, "ircd fd table too big\nHard Limit: %d IRC max: %d\n",
195 limit
, MAXCONNECTIONS
);
196 fprintf(stderr
, "set MAXCONNECTIONS to a smaller value");
201 /** Set up address and port and make a connection.
202 * @param aconf Provides the connection information.
203 * @param cptr Client structure for the peer.
204 * @return Non-zero on success; zero on failure.
206 static int connect_inet(struct ConfItem
* aconf
, struct Client
* cptr
)
208 const struct irc_sockaddr
*local
;
215 * Might as well get sockhost from here, the connection is attempted
216 * with it so if it fails its useless.
218 if (irc_in_addr_valid(&aconf
->origin
.addr
))
219 local
= &aconf
->origin
;
220 else if (irc_in_addr_is_ipv4(&aconf
->address
.addr
)) {
221 local
= &VirtualHost_v4
;
224 local
= &VirtualHost_v6
;
225 cli_fd(cptr
) = os_socket(local
, SOCK_STREAM
, cli_name(cptr
), family
);
226 if (cli_fd(cptr
) < 0)
230 * save connection info in client
232 memcpy(&cli_ip(cptr
), &aconf
->address
.addr
, sizeof(cli_ip(cptr
)));
233 ircd_ntoa_r(cli_sock_ip(cptr
), &cli_ip(cptr
));
235 * we want a big buffer for server connections
237 if (!os_set_sockbufs(cli_fd(cptr
), feature_int(FEAT_SOCKSENDBUF
), feature_int(FEAT_SOCKRECVBUF
))) {
238 cli_error(cptr
) = errno
;
239 report_error(SETBUFS_ERROR_MSG
, cli_name(cptr
), errno
);
245 * Set the TOS bits - this is nonfatal if it doesn't stick.
247 if (!os_set_tos(cli_fd(cptr
), FEAT_TOS_SERVER
)) {
248 report_error(TOS_ERROR_MSG
, cli_name(cptr
), errno
);
250 if ((result
= os_connect_nonb(cli_fd(cptr
), &aconf
->address
)) == IO_FAILURE
) {
251 cli_error(cptr
) = errno
;
252 report_error(CONNECT_ERROR_MSG
, cli_name(cptr
), errno
);
257 if (!socket_add(&(cli_socket(cptr
)), client_sock_callback
,
258 (void*) cli_connect(cptr
),
259 (result
== IO_SUCCESS
) ? SS_CONNECTED
: SS_CONNECTING
,
260 SOCK_EVENT_READABLE
, cli_fd(cptr
))) {
261 cli_error(cptr
) = ENFILE
;
262 report_error(REGISTER_ERROR_MSG
, cli_name(cptr
), ENFILE
);
267 cli_freeflag(cptr
) |= FREEFLAG_SOCKET
;
271 /** Attempt to send a sequence of bytes to the connection.
272 * As a side effect, updates \a cptr's FLAG_BLOCKED setting
273 * and sendB/sendK fields.
274 * @param cptr Client that should receive data.
275 * @param buf Message buffer to send to client.
276 * @return Negative on connection-fatal error; otherwise
277 * number of bytes sent.
279 unsigned int deliver_it(struct Client
*cptr
, struct MsgQ
*buf
)
281 unsigned int bytes_written
= 0;
282 unsigned int bytes_count
= 0;
285 switch (os_sendv_nonb(cli_fd(cptr
), buf
, &bytes_count
, &bytes_written
)) {
287 ClrFlag(cptr
, FLAG_BLOCKED
);
289 cli_sendB(cptr
) += bytes_written
;
290 cli_sendB(&me
) += bytes_written
;
291 /* A partial write implies that future writes will block. */
292 if (bytes_written
< bytes_count
)
293 SetFlag(cptr
, FLAG_BLOCKED
);
296 SetFlag(cptr
, FLAG_BLOCKED
);
299 cli_error(cptr
) = errno
;
300 SetFlag(cptr
, FLAG_DEADSOCKET
);
303 return bytes_written
;
306 /** Complete non-blocking connect()-sequence. Check access and
307 * terminate connection, if trouble detected.
308 * @param cptr Client to which we have connected, with all ConfItem structs attached.
309 * @return Zero on failure (caller should exit_client()), non-zero on success.
311 static int completed_connection(struct Client
* cptr
)
313 struct ConfItem
*aconf
;
315 struct Client
*acptr
;
321 * get the socket status from the fd first to check if
322 * connection actually succeeded
324 if ((cli_error(cptr
) = os_get_sockerr(cli_fd(cptr
)))) {
325 const char* msg
= strerror(cli_error(cptr
));
327 msg
= "Unknown error";
328 sendto_opmask_butone(0, SNO_OLDSNO
, "Connection failed to %s: %s",
329 cli_name(cptr
), msg
);
332 if (!(aconf
= find_conf_byname(cli_confs(cptr
), cli_name(cptr
), CONF_SERVER
))) {
333 sendto_opmask_butone(0, SNO_OLDSNO
, "Lost Server Line for %s", cli_name(cptr
));
336 if (s_state(&(cli_socket(cptr
))) == SS_CONNECTING
)
337 socket_state(&(cli_socket(cptr
)), SS_CONNECTED
);
339 if (!EmptyString(aconf
->passwd
))
340 sendrawto_one(cptr
, MSG_PASS
" :%s", aconf
->passwd
);
343 * Create a unique timestamp
346 for (i
= HighestFd
; i
> -1; --i
) {
347 if ((acptr
= LocalClientArray
[i
]) &&
348 (IsServer(acptr
) || IsHandshake(acptr
))) {
349 if (cli_serv(acptr
)->timestamp
>= newts
)
350 newts
= cli_serv(acptr
)->timestamp
+ 1;
353 assert(0 != cli_serv(cptr
));
355 cli_serv(cptr
)->timestamp
= newts
;
358 * Make us timeout after twice the timeout for DNS look ups
360 cli_lasttime(cptr
) = CurrentTime
;
361 SetFlag(cptr
, FLAG_PINGSENT
);
363 sendrawto_one(cptr
, MSG_SERVER
" %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
364 cli_name(&me
), cli_serv(&me
)->timestamp
, newts
,
365 MAJOR_PROTOCOL
, NumServCap(&me
),
366 feature_bool(FEAT_HUB
) ? "h" : "", cli_info(&me
));
368 return (IsDead(cptr
)) ? 0 : 1;
371 /** Close the physical connection. Side effects: MyConnect(cptr)
372 * becomes false and cptr->from becomes NULL.
373 * @param cptr Client to disconnect.
375 void close_connection(struct Client
*cptr
)
377 struct ConfItem
* aconf
;
379 if (IsServer(cptr
)) {
380 ServerStats
->is_sv
++;
381 ServerStats
->is_sbs
+= cli_sendB(cptr
);
382 ServerStats
->is_sbr
+= cli_receiveB(cptr
);
383 ServerStats
->is_sti
+= CurrentTime
- cli_firsttime(cptr
);
385 * If the connection has been up for a long amount of time, schedule
386 * a 'quick' reconnect, else reset the next-connect cycle.
388 if ((aconf
= find_conf_exact(cli_name(cptr
), cptr
, CONF_SERVER
))) {
390 * Reschedule a faster reconnect, if this was a automatically
391 * connected configuration entry. (Note that if we have had
392 * a rehash in between, the status has been changed to
393 * CONF_ILLEGAL). But only do this if it was a "good" link.
395 aconf
->hold
= CurrentTime
;
396 aconf
->hold
+= ((aconf
->hold
- cli_since(cptr
) >
397 feature_int(FEAT_HANGONGOODLINK
)) ?
398 feature_int(FEAT_HANGONRETRYDELAY
) : ConfConFreq(aconf
));
399 /* if (nextconnect > aconf->hold) */
400 /* nextconnect = aconf->hold; */
403 else if (IsUser(cptr
)) {
404 ServerStats
->is_cl
++;
405 ServerStats
->is_cbs
+= cli_sendB(cptr
);
406 ServerStats
->is_cbr
+= cli_receiveB(cptr
);
407 ServerStats
->is_cti
+= CurrentTime
- cli_firsttime(cptr
);
410 ServerStats
->is_ni
++;
412 if (-1 < cli_fd(cptr
)) {
413 flush_connections(cptr
);
414 LocalClientArray
[cli_fd(cptr
)] = 0;
416 socket_del(&(cli_socket(cptr
))); /* queue a socket delete */
419 SetFlag(cptr
, FLAG_DEADSOCKET
);
421 MsgQClear(&(cli_sendQ(cptr
)));
422 client_drop_sendq(cli_connect(cptr
));
423 DBufClear(&(cli_recvQ(cptr
)));
424 memset(cli_passwd(cptr
), 0, sizeof(cli_passwd(cptr
)));
425 set_snomask(cptr
, 0, SNO_SET
);
427 det_confs_butmask(cptr
, 0);
429 if (cli_listener(cptr
)) {
430 release_listener(cli_listener(cptr
));
431 cli_listener(cptr
) = 0;
434 for ( ; HighestFd
> 0; --HighestFd
) {
435 if (LocalClientArray
[HighestFd
])
440 /** Close all unregistered connections.
441 * @param source Oper who requested the close.
442 * @return Number of closed connections.
444 int net_close_unregistered_connections(struct Client
* source
)
451 for (i
= HighestFd
; i
> 0; --i
) {
452 if ((cptr
= LocalClientArray
[i
]) && !IsRegistered(cptr
)) {
453 send_reply(source
, RPL_CLOSING
, get_client_name(source
, HIDE_IP
));
454 exit_client(source
, cptr
, &me
, "Oper Closing");
461 /** Creates a client which has just connected to us on the given fd.
462 * The sockhost field is initialized with the ip# of the host.
463 * The client is not added to the linked list of clients, it is
464 * passed off to the auth handler for dns and ident queries.
465 * @param listener Listening socket that received the connection.
466 * @param fd File descriptor of new connection.
468 void add_connection(struct Listener
* listener
, int fd
) {
469 struct irc_sockaddr addr
;
470 struct Client
*new_client
;
471 time_t next_target
= 0;
473 const char* const throttle_message
=
474 "ERROR :Your host is trying to (re)connect too fast -- throttled\r\n";
475 /* 12345678901234567890123456789012345679012345678901234567890123456 */
476 const char* const register_message
=
477 "ERROR :Unable to complete your registration\r\n";
479 assert(0 != listener
);
482 * Removed preliminary access check. Full check is performed in m_server and
483 * m_user instead. Also connection time out help to get rid of unwanted
486 if (!os_get_peername(fd
, &addr
) || !os_set_nonblocking(fd
)) {
487 ++ServerStats
->is_ref
;
492 * Disable IP (*not* TCP) options. In particular, this makes it impossible
493 * to use source routing to connect to the server. If we didn't do this
494 * (and if intermediate networks didn't drop source-routed packets), an
495 * attacker could successfully IP spoof us...and even return the anti-spoof
496 * ping, because the options would cause the packet to be routed back to
497 * the spoofer's machine. When we disable the IP options, we delete the
498 * source route, and the normal routing takes over.
500 os_disable_options(fd
);
502 if (listener
->server
)
504 new_client
= make_client(0, STAT_UNKNOWN_SERVER
);
509 * Add this local client to the IPcheck registry.
511 * If they're throttled, murder them, but tell them why first.
513 if (!IPcheck_local_connect(&addr
.addr
, &next_target
))
515 ++ServerStats
->is_ref
;
516 write(fd
, throttle_message
, strlen(throttle_message
));
520 new_client
= make_client(0, STAT_UNKNOWN_USER
);
521 SetIPChecked(new_client
);
525 * Copy ascii address to 'sockhost' just in case. Then we have something
526 * valid to put into error messages...
528 ircd_ntoa_r(cli_sock_ip(new_client
), &addr
.addr
);
529 strcpy(cli_sockhost(new_client
), cli_sock_ip(new_client
));
530 memcpy(&cli_ip(new_client
), &addr
.addr
, sizeof(cli_ip(new_client
)));
533 cli_nexttarget(new_client
) = next_target
;
535 cli_fd(new_client
) = fd
;
536 if (!socket_add(&(cli_socket(new_client
)), client_sock_callback
,
537 (void*) cli_connect(new_client
), SS_CONNECTED
, 0, fd
)) {
538 ++ServerStats
->is_ref
;
539 write(fd
, register_message
, strlen(register_message
));
541 cli_fd(new_client
) = -1;
544 cli_freeflag(new_client
) |= FREEFLAG_SOCKET
;
545 cli_listener(new_client
) = listener
;
546 ++listener
->ref_count
;
548 Count_newunknown(UserStats
);
549 /* if we've made it this far we can put the client on the auth query pile */
550 start_auth(new_client
);
553 /** Determines whether to tell the events engine we're interested in
555 * @param cptr Client for which to decide this.
557 void update_write(struct Client
* cptr
)
559 /* If there are messages that need to be sent along, or if the client
560 * is in the middle of a /list, then we need to tell the engine that
561 * we're interested in writable events--otherwise, we need to drop
564 socket_events(&(cli_socket(cptr
)),
565 ((MsgQLength(&cli_sendQ(cptr
)) || cli_listing(cptr
)) ?
566 SOCK_ACTION_ADD
: SOCK_ACTION_DEL
) | SOCK_EVENT_WRITABLE
);
569 /** Read a 'packet' of data from a connection and process it. Read in
570 * 8k chunks to give a better performance rating (for server
571 * connections). Do some tricky stuff for client connections to make
572 * sure they don't do any flooding >:-) -avalon
573 * @param cptr Client from which to read data.
574 * @param socket_ready If non-zero, more data can be read from the client's socket.
575 * @return Positive number on success, zero on connection-fatal failure, negative
578 static int read_packet(struct Client
*cptr
, int socket_ready
)
580 unsigned int dolen
= 0;
581 unsigned int length
= 0;
584 !(IsUser(cptr
) && !IsOper(cptr
) &&
585 DBufLength(&(cli_recvQ(cptr
))) > feature_int(FEAT_CLIENT_FLOOD
))) {
586 switch (os_recv_nonb(cli_fd(cptr
), readbuf
, sizeof(readbuf
), &length
)) {
591 cli_lasttime(cptr
) = CurrentTime
;
592 if (cli_lasttime(cptr
) > cli_since(cptr
))
593 cli_since(cptr
) = cli_lasttime(cptr
);
594 ClrFlag(cptr
, FLAG_PINGSENT
);
595 ClrFlag(cptr
, FLAG_NONL
);
601 cli_error(cptr
) = errno
;
602 /* SetFlag(cptr, FLAG_DEADSOCKET); */
608 * For server connections, we process as many as we can without
609 * worrying about the time of day or anything :)
611 if (length
> 0 && IsServer(cptr
))
612 return server_dopacket(cptr
, readbuf
, length
);
613 else if (length
> 0 && (IsHandshake(cptr
) || IsConnecting(cptr
)))
614 return connect_dopacket(cptr
, readbuf
, length
);
618 * Before we even think of parsing what we just read, stick
619 * it on the end of the receive queue and do it when its
622 if (length
> 0 && dbuf_put(&(cli_recvQ(cptr
)), readbuf
, length
) == 0)
623 return exit_client(cptr
, cptr
, &me
, "dbuf_put fail");
626 if (DBufLength(&(cli_recvQ(cptr
))) > feature_int(FEAT_CLIENT_FLOOD
)
628 return exit_client(cptr
, cptr
, &me
, "Excess Flood");
631 while (DBufLength(&(cli_recvQ(cptr
))) && !NoNewLine(cptr
) &&
632 (IsTrusted(cptr
) || cli_since(cptr
) - CurrentTime
< 10))
634 dolen
= dbuf_getmsg(&(cli_recvQ(cptr
)), cli_buffer(cptr
), BUFSIZE
);
636 * Devious looking...whats it do ? well..if a client
637 * sends a *long* message without any CR or LF, then
638 * dbuf_getmsg fails and we pull it out using this
639 * loop which just gets the next 512 bytes and then
640 * deletes the rest of the buffer contents.
645 if (DBufLength(&(cli_recvQ(cptr
))) < 510)
646 SetFlag(cptr
, FLAG_NONL
);
648 DBufClear(&(cli_recvQ(cptr
)));
650 else if (client_dopacket(cptr
, dolen
) == CPTR_KILLED
)
653 * If it has become registered as a Server
654 * then skip the per-message parsing below.
656 if (IsHandshake(cptr
) || IsServer(cptr
))
660 dolen
= dbuf_get(&(cli_recvQ(cptr
)), readbuf
, sizeof(readbuf
));
665 if (DBufLength(&(cli_recvQ(cptr
))) < 510)
666 SetFlag(cptr
, FLAG_NONL
);
668 DBufClear(&(cli_recvQ(cptr
)));
670 else if ((IsServer(cptr
) &&
671 server_dopacket(cptr
, readbuf
, dolen
) == CPTR_KILLED
) ||
673 connect_dopacket(cptr
, readbuf
, dolen
) == CPTR_KILLED
))
679 /* If there's still data to process, wait 2 seconds first */
680 if (DBufLength(&(cli_recvQ(cptr
))) && !NoNewLine(cptr
) &&
681 !t_onqueue(&(cli_proc(cptr
))))
683 Debug((DEBUG_LIST
, "Adding client process timer for %C", cptr
));
684 cli_freeflag(cptr
) |= FREEFLAG_TIMER
;
685 timer_add(&(cli_proc(cptr
)), client_timer_callback
, cli_connect(cptr
),
692 /** Start a connection to another server.
693 * @param aconf Connect block data for target server.
694 * @param by Client who requested the connection (if any).
695 * @return Non-zero on success; zero on failure.
697 int connect_server(struct ConfItem
* aconf
, struct Client
* by
)
699 struct Client
* cptr
= 0;
702 if (aconf
->dns_pending
) {
703 sendto_opmask_butone(0, SNO_OLDSNO
, "Server %s connect DNS pending",
707 Debug((DEBUG_NOTICE
, "Connect to %s[@%s]", aconf
->name
,
708 ircd_ntoa(&aconf
->address
.addr
)));
710 if ((cptr
= FindClient(aconf
->name
))) {
711 if (IsServer(cptr
) || IsMe(cptr
)) {
712 sendto_opmask_butone(0, SNO_OLDSNO
, "Server %s already present from %s",
713 aconf
->name
, cli_name(cli_from(cptr
)));
714 if (by
&& IsUser(by
) && !MyUser(by
)) {
715 sendcmdto_one(&me
, CMD_NOTICE
, by
, "%C :Server %s already present "
716 "from %s", by
, aconf
->name
, cli_name(cli_from(cptr
)));
720 else if (IsHandshake(cptr
) || IsConnecting(cptr
)) {
721 if (by
&& IsUser(by
)) {
722 sendcmdto_one(&me
, CMD_NOTICE
, by
, "%C :Connection to %s already in "
723 "progress", by
, cli_name(cptr
));
729 * If we don't know the IP# for this host and it is a hostname and
730 * not a ip# string, then try and find the appropriate host record.
732 if (!irc_in_addr_valid(&aconf
->address
.addr
)
733 && !ircd_aton(&aconf
->address
.addr
, aconf
->host
)) {
734 char buf
[HOSTLEN
+ 1];
736 host_from_uh(buf
, aconf
->host
, HOSTLEN
);
737 gethost_byname(buf
, connect_dns_callback
, aconf
);
738 aconf
->dns_pending
= 1;
741 cptr
= make_client(NULL
, STAT_UNKNOWN_SERVER
);
744 * Copy these in so we have something for error detection.
746 ircd_strncpy(cli_name(cptr
), aconf
->name
, HOSTLEN
);
747 ircd_strncpy(cli_sockhost(cptr
), aconf
->host
, HOSTLEN
);
750 * Attach config entries to client here rather than in
751 * completed_connection. This to avoid null pointer references
753 attach_confs_byhost(cptr
, aconf
->host
, CONF_SERVER
);
755 if (!find_conf_byhost(cli_confs(cptr
), aconf
->host
, CONF_SERVER
)) {
756 sendto_opmask_butone(0, SNO_OLDSNO
, "Host %s is not enabled for "
757 "connecting: no Connect block", aconf
->name
);
758 if (by
&& IsUser(by
) && !MyUser(by
)) {
759 sendcmdto_one(&me
, CMD_NOTICE
, by
, "%C :Connect to host %s failed: no "
760 "Connect block", by
, aconf
->name
);
762 det_confs_butmask(cptr
, 0);
767 * attempt to connect to the server in the conf line
769 if (!connect_inet(aconf
, cptr
)) {
770 if (by
&& IsUser(by
) && !MyUser(by
)) {
771 sendcmdto_one(&me
, CMD_NOTICE
, by
, "%C :Couldn't connect to %s", by
,
774 det_confs_butmask(cptr
, 0);
779 * NOTE: if we're here we have a valid C:Line and the client should
780 * have started the connection and stored the remote address/port and
781 * ip address name in itself
783 * The socket has been connected or connect is in progress.
786 if (by
&& IsUser(by
)) {
787 ircd_snprintf(0, cli_serv(cptr
)->by
, sizeof(cli_serv(cptr
)->by
), "%s%s",
789 assert(0 == cli_serv(cptr
)->user
);
790 cli_serv(cptr
)->user
= cli_user(by
);
791 cli_user(by
)->refcnt
++;
794 *(cli_serv(cptr
))->by
= '\0';
795 /* strcpy(cptr->serv->by, "Auto"); */
797 cli_serv(cptr
)->up
= &me
;
800 if (cli_fd(cptr
) > HighestFd
)
801 HighestFd
= cli_fd(cptr
);
803 LocalClientArray
[cli_fd(cptr
)] = cptr
;
805 Count_newunknown(UserStats
);
806 /* Actually we lie, the connect hasn't succeeded yet, but we have a valid
807 * cptr, so we register it now.
808 * Maybe these two calls should be merged.
810 add_client_to_list(cptr
);
812 /* nextping = CurrentTime; */
814 return (s_state(&cli_socket(cptr
)) == SS_CONNECTED
) ?
815 completed_connection(cptr
) : 1;
818 /** Find the real hostname for the host running the server (or one which
819 * matches the server's name) and its primary IP#. Hostname is stored
820 * in the client structure passed as a pointer.
822 void init_server_identity(void)
824 const struct LocalConf
* conf
= conf_get_local();
827 ircd_strncpy(cli_name(&me
), conf
->name
, HOSTLEN
);
828 SetYXXServerName(&me
, conf
->numeric
);
831 /** Process events on a client socket.
832 * @param ev Socket event structure that has a struct Connection as
833 * its associated data.
835 static void client_sock_callback(struct Event
* ev
)
838 struct Connection
* con
;
842 assert(0 != ev_socket(ev
));
843 assert(0 != s_data(ev_socket(ev
)));
845 con
= (struct Connection
*) s_data(ev_socket(ev
));
847 assert(0 != con_client(con
) || ev_type(ev
) == ET_DESTROY
);
849 cptr
= con_client(con
);
851 assert(0 == cptr
|| con
== cli_connect(cptr
));
853 switch (ev_type(ev
)) {
855 con_freeflag(con
) &= ~FREEFLAG_SOCKET
;
857 if (!con_freeflag(con
) && !cptr
)
858 free_connection(con
);
861 case ET_CONNECT
: /* socket connection completed */
862 if (!completed_connection(cptr
) || IsDead(cptr
))
863 fallback
= cli_info(cptr
);
866 case ET_ERROR
: /* an error occurred */
867 fallback
= cli_info(cptr
);
868 cli_error(cptr
) = ev_data(ev
);
869 if (s_state(&(con_socket(con
))) == SS_CONNECTING
) {
870 completed_connection(cptr
);
871 /* for some reason, the os_get_sockerr() in completed_connect()
872 * can return 0 even when ev_data(ev) indicates a real error, so
873 * re-assign the client error here.
875 cli_error(cptr
) = ev_data(ev
);
879 case ET_EOF
: /* end of file on socket */
880 Debug((DEBUG_ERROR
, "READ ERROR: fd = %d %d", cli_fd(cptr
),
882 SetFlag(cptr
, FLAG_DEADSOCKET
);
883 if ((IsServer(cptr
) || IsHandshake(cptr
)) && cli_error(cptr
) == 0) {
884 exit_client_msg(cptr
, cptr
, &me
, "Server %s closed the connection (%s)",
885 cli_name(cptr
), cli_serv(cptr
)->last_error_msg
);
888 fmt
= "Read error: %s";
889 fallback
= "EOF from client";
893 case ET_WRITE
: /* socket is writable */
894 ClrFlag(cptr
, FLAG_BLOCKED
);
895 if (cli_listing(cptr
) && MsgQLength(&(cli_sendQ(cptr
))) < 2048)
896 list_next_channels(cptr
);
897 Debug((DEBUG_SEND
, "Sending queued data to %C", cptr
));
901 case ET_READ
: /* socket is readable */
903 Debug((DEBUG_DEBUG
, "Reading data from %C", cptr
));
904 if (read_packet(cptr
, 1) == 0) /* error while reading packet */
905 fallback
= "EOF from client";
910 assert(0 && "Unrecognized socket event in client_sock_callback()");
914 assert(0 == cptr
|| 0 == cli_connect(cptr
) || con
== cli_connect(cptr
));
917 const char* msg
= (cli_error(cptr
)) ? strerror(cli_error(cptr
)) : fallback
;
919 msg
= "Unknown error";
920 exit_client_msg(cptr
, cptr
, &me
, fmt
, msg
);
924 /** Process a timer on client socket.
925 * @param ev Timer event that has a struct Connection as its
928 static void client_timer_callback(struct Event
* ev
)
931 struct Connection
* con
;
933 assert(0 != ev_timer(ev
));
934 assert(0 != t_data(ev_timer(ev
)));
935 assert(ET_DESTROY
== ev_type(ev
) || ET_EXPIRE
== ev_type(ev
));
937 con
= (struct Connection
*) t_data(ev_timer(ev
));
939 assert(0 != con_client(con
) || ev_type(ev
) == ET_DESTROY
);
941 cptr
= con_client(con
);
943 assert(0 == cptr
|| con
== cli_connect(cptr
));
945 if (ev_type(ev
)== ET_DESTROY
) {
946 con_freeflag(con
) &= ~FREEFLAG_TIMER
; /* timer has expired... */
948 if (!con_freeflag(con
) && !cptr
)
949 free_connection(con
); /* client is being destroyed */
951 Debug((DEBUG_LIST
, "Client process timer for %C expired; processing",
953 read_packet(cptr
, 0); /* read_packet will re-add timer if needed */
956 assert(0 == cptr
|| 0 == cli_connect(cptr
) || con
== cli_connect(cptr
));