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.
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>
78 /** Array of my own clients, indexed by file descriptor. */
79 struct Client* LocalClientArray[MAXCONNECTIONS];
80 /** Maximum file descriptor in current use. */
82 /** Default local address for outbound IPv4 connections. */
83 struct irc_sockaddr VirtualHost_v4;
84 /** Default local address for outbound IPv6 connections. */
85 struct irc_sockaddr VirtualHost_v6;
86 /** Temporary buffer for reading data from a peer. */
87 static char readbuf[SERVER_TCP_WINDOW];
90 * report_error text constants
92 const char* const ACCEPT_ERROR_MSG = "error accepting connection for %s: %s";
93 const char* const BIND_ERROR_MSG = "bind error for %s: %s";
94 const char* const CONNECT_ERROR_MSG = "connect to host %s failed: %s";
95 const char* const CONNLIMIT_ERROR_MSG = "connect limit exceeded for %s: %s";
96 const char* const LISTEN_ERROR_MSG = "listen error for %s: %s";
97 const char* const NONB_ERROR_MSG = "error setting non-blocking for %s: %s";
98 const char* const PEERNAME_ERROR_MSG = "getpeername failed for %s: %s";
99 const char* const POLL_ERROR_MSG = "poll error for %s: %s";
100 const char* const REGISTER_ERROR_MSG = "registering %s: %s";
101 const char* const REUSEADDR_ERROR_MSG = "error setting SO_REUSEADDR for %s: %s";
102 const char* const SELECT_ERROR_MSG = "select error for %s: %s";
103 const char* const SETBUFS_ERROR_MSG = "error setting buffer size for %s: %s";
104 const char* const SOCKET_ERROR_MSG = "error creating socket for %s: %s";
105 const char* const TOS_ERROR_MSG = "error setting TOS for %s: %s";
108 static void client_sock_callback(struct Event* ev);
109 static void client_timer_callback(struct Event* ev);
111 #if !defined(USE_POLL)
112 #if FD_SETSIZE < (MAXCONNECTIONS + 4)
116 * All operating systems work when MAXCONNECTIONS <= 252.
117 * Most operating systems work when MAXCONNECTIONS <= 1020 and FD_SETSIZE is
118 * updated correctly in the system headers (on BSD systems our sys.h has
119 * defined FD_SETSIZE to MAXCONNECTIONS+4 before including the system's headers
120 * but sys/types.h might have abruptly redefined it so the check is still
121 * done), you might already need to recompile your kernel.
122 * For larger FD_SETSIZE your mileage may vary (kernel patches may be needed).
123 * The check is _NOT_ done if we will not use FD_SETS at all (USE_POLL)
125 #error "FD_SETSIZE is too small or MAXCONNECTIONS too large."
131 * Cannot use perror() within daemon. stderr is closed in
132 * ircd and cannot be used. And, worse yet, it might have
133 * been reassigned to a normal connection...
136 /** Replacement for perror(). Record error to log. Send a copy to all
137 * *LOCAL* opers, but only if no errors were sent to them in the last
139 * @param text A *format* string for outputting error. It must contain
140 * only two '%s', the first will be replaced by the sockhost from the
141 * cptr, and the latter will be taken from sys_errlist[errno].
142 * @param who The client associated with the error.
143 * @param err The errno value to display.
145 void report_error(const char* text, const char* who, int err)
147 static time_t last_notice = 0;
148 int errtmp = errno; /* debug may change 'errno' */
149 const char* errmsg = (err) ? strerror(err) : "";
152 errmsg = "Unknown error";
154 if (EmptyString(who))
157 if (last_notice + 20 < CurrentTime) {
159 * pace error messages so opers don't get flooded by transients
161 sendto_opmask_butone(0, SNO_OLDSNO, text, who, errmsg);
162 last_notice = CurrentTime;
164 log_write(LS_SOCKET, L_ERROR, 0, text, who, errmsg);
169 /** Called when resolver query finishes. If the DNS lookup was
170 * successful, start the connection; otherwise notify opers of the
172 * @param vptr The struct ConfItem representing the Connect block.
173 * @param hp A pointer to the DNS lookup results (NULL on failure).
175 static void connect_dns_callback(void* vptr, const struct irc_in_addr *addr, const char *h_name)
177 struct ConfItem* aconf = (struct ConfItem*) vptr;
179 aconf->dns_pending = 0;
181 memcpy(&aconf->address, addr, sizeof(aconf->address));
182 connect_server(aconf, 0);
185 sendto_opmask_butone(0, SNO_OLDSNO, "Connect to %s failed: host lookup",
189 /** Closes all file descriptors.
190 * @param close_stderr If non-zero, also close stderr.
192 void close_connections(int close_stderr)
201 for (i = 3; i < MAXCONNECTIONS; ++i)
205 /** Initialize process fd limit to MAXCONNECTIONS.
207 int init_connection_limits(void)
209 int limit = os_set_fdlimit(MAXCONNECTIONS);
213 fprintf(stderr, "error setting max fd's to %d\n", limit);
215 else if (limit > 0) {
216 fprintf(stderr, "ircd fd table too big\nHard Limit: %d IRC max: %d\n",
217 limit, MAXCONNECTIONS);
218 fprintf(stderr, "set MAXCONNECTIONS to a smaller value");
223 /** Set up address and port and make a connection.
224 * @param aconf Provides the connection information.
225 * @param cptr Client structure for the peer.
226 * @return Non-zero on success; zero on failure.
228 static int connect_inet(struct ConfItem* aconf, struct Client* cptr)
230 const struct irc_sockaddr *local;
235 * Might as well get sockhost from here, the connection is attempted
236 * with it so if it fails its useless.
238 if (irc_in_addr_valid(&aconf->origin.addr))
239 local = &aconf->origin;
240 else if (irc_in_addr_is_ipv4(&aconf->address.addr))
241 local = &VirtualHost_v4;
243 local = &VirtualHost_v6;
244 cli_fd(cptr) = os_socket(local, SOCK_STREAM, cli_name(cptr));
245 if (cli_fd(cptr) < 0)
249 * save connection info in client
251 memcpy(&cli_ip(cptr), &aconf->address.addr, sizeof(cli_ip(cptr)));
252 ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr));
254 * we want a big buffer for server connections
256 if (!os_set_sockbufs(cli_fd(cptr), feature_int(FEAT_SOCKSENDBUF), feature_int(FEAT_SOCKRECVBUF))) {
257 cli_error(cptr) = errno;
258 report_error(SETBUFS_ERROR_MSG, cli_name(cptr), errno);
264 * Set the TOS bits - this is nonfatal if it doesn't stick.
266 if (!os_set_tos(cli_fd(cptr), FEAT_TOS_SERVER)) {
267 report_error(TOS_ERROR_MSG, cli_name(cptr), errno);
269 if ((result = os_connect_nonb(cli_fd(cptr), &aconf->address)) == IO_FAILURE) {
270 cli_error(cptr) = errno;
271 report_error(CONNECT_ERROR_MSG, cli_name(cptr), errno);
276 if (!socket_add(&(cli_socket(cptr)), client_sock_callback,
277 (void*) cli_connect(cptr),
278 (result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING,
279 SOCK_EVENT_READABLE, cli_fd(cptr))) {
280 cli_error(cptr) = ENFILE;
281 report_error(REGISTER_ERROR_MSG, cli_name(cptr), ENFILE);
286 cli_freeflag(cptr) |= FREEFLAG_SOCKET;
290 /** Attempt to send a sequence of bytes to the connection.
291 * As a side effect, updates \a cptr's FLAG_BLOCKED setting
292 * and sendB/sendK fields.
293 * @param cptr Client that should receive data.
294 * @param buf Message buffer to send to client.
295 * @return Negative on connection-fatal error; otherwise
296 * number of bytes sent.
298 unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
300 unsigned int bytes_written = 0;
301 unsigned int bytes_count = 0;
304 switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
306 ClrFlag(cptr, FLAG_BLOCKED);
308 cli_sendB(cptr) += bytes_written;
309 cli_sendB(&me) += bytes_written;
310 /* A partial write implies that future writes will block. */
311 if (bytes_written < bytes_count)
312 SetFlag(cptr, FLAG_BLOCKED);
315 SetFlag(cptr, FLAG_BLOCKED);
318 cli_error(cptr) = errno;
319 SetFlag(cptr, FLAG_DEADSOCKET);
322 return bytes_written;
325 /** Complete non-blocking connect()-sequence. Check access and
326 * terminate connection, if trouble detected.
327 * @param cptr Client to which we have connected, with all ConfItem structs attached.
328 * @return Zero on failure (caller should exit_client()), non-zero on success.
330 static int completed_connection(struct Client* cptr)
332 struct ConfItem *aconf;
334 struct Client *acptr;
340 * get the socket status from the fd first to check if
341 * connection actually succeeded
343 if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
344 const char* msg = strerror(cli_error(cptr));
346 msg = "Unknown error";
347 sendto_opmask_butone(0, SNO_OLDSNO, "Connection failed to %s: %s",
348 cli_name(cptr), msg);
351 if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
352 sendto_opmask_butone(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
355 if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
356 socket_state(&(cli_socket(cptr)), SS_CONNECTED);
358 if (!EmptyString(aconf->passwd))
359 sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
362 * Create a unique timestamp
365 for (i = HighestFd; i > -1; --i) {
366 if ((acptr = LocalClientArray[i]) &&
367 (IsServer(acptr) || IsHandshake(acptr))) {
368 if (cli_serv(acptr)->timestamp >= newts)
369 newts = cli_serv(acptr)->timestamp + 1;
372 assert(0 != cli_serv(cptr));
374 cli_serv(cptr)->timestamp = newts;
377 * Make us timeout after twice the timeout for DNS look ups
379 cli_lasttime(cptr) = CurrentTime;
380 SetFlag(cptr, FLAG_PINGSENT);
382 sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
383 cli_name(&me), cli_serv(&me)->timestamp, newts,
384 MAJOR_PROTOCOL, NumServCap(&me),
385 feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
387 return (IsDead(cptr)) ? 0 : 1;
390 /** Close the physical connection. Side effects: MyConnect(cptr)
391 * becomes false and cptr->from becomes NULL.
392 * @param cptr Client to disconnect.
394 void close_connection(struct Client *cptr)
396 struct ConfItem* aconf;
398 if (IsServer(cptr)) {
399 ServerStats->is_sv++;
400 ServerStats->is_sbs += cli_sendB(cptr);
401 ServerStats->is_sbr += cli_receiveB(cptr);
402 ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
404 * If the connection has been up for a long amount of time, schedule
405 * a 'quick' reconnect, else reset the next-connect cycle.
407 if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
409 * Reschedule a faster reconnect, if this was a automatically
410 * connected configuration entry. (Note that if we have had
411 * a rehash in between, the status has been changed to
412 * CONF_ILLEGAL). But only do this if it was a "good" link.
414 aconf->hold = CurrentTime;
415 aconf->hold += ((aconf->hold - cli_since(cptr) >
416 feature_int(FEAT_HANGONGOODLINK)) ?
417 feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
418 /* if (nextconnect > aconf->hold) */
419 /* nextconnect = aconf->hold; */
422 else if (IsUser(cptr)) {
423 ServerStats->is_cl++;
424 ServerStats->is_cbs += cli_sendB(cptr);
425 ServerStats->is_cbr += cli_receiveB(cptr);
426 ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
429 ServerStats->is_ni++;
431 if (-1 < cli_fd(cptr)) {
432 flush_connections(cptr);
433 LocalClientArray[cli_fd(cptr)] = 0;
435 socket_del(&(cli_socket(cptr))); /* queue a socket delete */
438 SetFlag(cptr, FLAG_DEADSOCKET);
440 MsgQClear(&(cli_sendQ(cptr)));
441 client_drop_sendq(cli_connect(cptr));
442 DBufClear(&(cli_recvQ(cptr)));
443 memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
444 set_snomask(cptr, 0, SNO_SET);
446 det_confs_butmask(cptr, 0);
448 if (cli_listener(cptr)) {
449 release_listener(cli_listener(cptr));
450 cli_listener(cptr) = 0;
453 for ( ; HighestFd > 0; --HighestFd) {
454 if (LocalClientArray[HighestFd])
459 /** Close all unregistered connections.
460 * @param source Oper who requested the close.
461 * @return Number of closed connections.
463 int net_close_unregistered_connections(struct Client* source)
470 for (i = HighestFd; i > 0; --i) {
471 if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
472 send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
473 exit_client(source, cptr, &me, "Oper Closing");
480 /** Creates a client which has just connected to us on the given fd.
481 * The sockhost field is initialized with the ip# of the host.
482 * The client is not added to the linked list of clients, it is
483 * passed off to the auth handler for dns and ident queries.
484 * @param listener Listening socket that received the connection.
485 * @param fd File descriptor of new connection.
487 void add_connection(struct Listener* listener, int fd) {
488 struct irc_sockaddr addr;
489 struct Client *new_client;
490 time_t next_target = 0;
492 const char* const throttle_message =
493 "ERROR :Your host is trying to (re)connect too fast -- throttled\r\n";
494 /* 12345678901234567890123456789012345679012345678901234567890123456 */
495 const char* const register_message =
496 "ERROR :Unable to complete your registration\r\n";
498 assert(0 != listener);
501 * Removed preliminary access check. Full check is performed in m_server and
502 * m_user instead. Also connection time out help to get rid of unwanted
505 if (!os_get_peername(fd, &addr) || !os_set_nonblocking(fd)) {
506 ++ServerStats->is_ref;
511 * Disable IP (*not* TCP) options. In particular, this makes it impossible
512 * to use source routing to connect to the server. If we didn't do this
513 * (and if intermediate networks didn't drop source-routed packets), an
514 * attacker could successfully IP spoof us...and even return the anti-spoof
515 * ping, because the options would cause the packet to be routed back to
516 * the spoofer's machine. When we disable the IP options, we delete the
517 * source route, and the normal routing takes over.
519 os_disable_options(fd);
522 * Add this local client to the IPcheck registry.
524 * If they're throttled, murder them, but tell them why first.
526 if (!IPcheck_local_connect(&addr.addr, &next_target) && !listener->server)
528 ++ServerStats->is_ref;
529 write(fd, throttle_message, strlen(throttle_message));
534 new_client = make_client(0, ((listener->server) ?
535 STAT_UNKNOWN_SERVER : STAT_UNKNOWN_USER));
538 * Copy ascii address to 'sockhost' just in case. Then we have something
539 * valid to put into error messages...
541 SetIPChecked(new_client);
542 ircd_ntoa_r(cli_sock_ip(new_client), &addr.addr);
543 strcpy(cli_sockhost(new_client), cli_sock_ip(new_client));
544 memcpy(&cli_ip(new_client), &addr.addr, sizeof(cli_ip(new_client)));
547 cli_nexttarget(new_client) = next_target;
549 cli_fd(new_client) = fd;
550 if (!socket_add(&(cli_socket(new_client)), client_sock_callback,
551 (void*) cli_connect(new_client), SS_CONNECTED, 0, fd)) {
552 ++ServerStats->is_ref;
553 write(fd, register_message, strlen(register_message));
555 cli_fd(new_client) = -1;
558 cli_freeflag(new_client) |= FREEFLAG_SOCKET;
559 cli_listener(new_client) = listener;
560 ++listener->ref_count;
562 Count_newunknown(UserStats);
563 /* if we've made it this far we can put the client on the auth query pile */
564 start_auth(new_client);
567 /** Determines whether to tell the events engine we're interested in
569 * @param cptr Client for which to decide this.
571 void update_write(struct Client* cptr)
573 /* If there are messages that need to be sent along, or if the client
574 * is in the middle of a /list, then we need to tell the engine that
575 * we're interested in writable events--otherwise, we need to drop
578 socket_events(&(cli_socket(cptr)),
579 ((MsgQLength(&cli_sendQ(cptr)) || cli_listing(cptr)) ?
580 SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE);
583 /** Read a 'packet' of data from a connection and process it. Read in
584 * 8k chunks to give a better performance rating (for server
585 * connections). Do some tricky stuff for client connections to make
586 * sure they don't do any flooding >:-) -avalon
587 * @param cptr Client from which to read data.
588 * @param socket_ready If non-zero, more data can be read from the client's socket.
589 * @return Positive number on success, zero on connection-fatal failure, negative
592 static int read_packet(struct Client *cptr, int socket_ready)
594 unsigned int dolen = 0;
595 unsigned int length = 0;
599 DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))) {
600 switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) {
605 cli_lasttime(cptr) = CurrentTime;
606 if (cli_lasttime(cptr) > cli_since(cptr))
607 cli_since(cptr) = cli_lasttime(cptr);
608 ClrFlag(cptr, FLAG_PINGSENT);
609 ClrFlag(cptr, FLAG_NONL);
615 cli_error(cptr) = errno;
616 /* SetFlag(cptr, FLAG_DEADSOCKET); */
622 * For server connections, we process as many as we can without
623 * worrying about the time of day or anything :)
625 if (length > 0 && IsServer(cptr))
626 return server_dopacket(cptr, readbuf, length);
627 else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr)))
628 return connect_dopacket(cptr, readbuf, length);
632 * Before we even think of parsing what we just read, stick
633 * it on the end of the receive queue and do it when its
636 if (length > 0 && dbuf_put(&(cli_recvQ(cptr)), readbuf, length) == 0)
637 return exit_client(cptr, cptr, &me, "dbuf_put fail");
639 if (DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))
640 return exit_client(cptr, cptr, &me, "Excess Flood");
642 while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
643 (IsTrusted(cptr) || cli_since(cptr) - CurrentTime < 10))
645 dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE);
647 * Devious looking...whats it do ? well..if a client
648 * sends a *long* message without any CR or LF, then
649 * dbuf_getmsg fails and we pull it out using this
650 * loop which just gets the next 512 bytes and then
651 * deletes the rest of the buffer contents.
656 if (DBufLength(&(cli_recvQ(cptr))) < 510)
657 SetFlag(cptr, FLAG_NONL);
659 DBufClear(&(cli_recvQ(cptr)));
661 else if (client_dopacket(cptr, dolen) == CPTR_KILLED)
664 * If it has become registered as a Server
665 * then skip the per-message parsing below.
667 if (IsHandshake(cptr) || IsServer(cptr))
671 dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf));
676 if (DBufLength(&(cli_recvQ(cptr))) < 510)
677 SetFlag(cptr, FLAG_NONL);
679 DBufClear(&(cli_recvQ(cptr)));
681 else if ((IsServer(cptr) &&
682 server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) ||
684 connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED))
690 /* If there's still data to process, wait 2 seconds first */
691 if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
692 !t_onqueue(&(cli_proc(cptr))))
694 Debug((DEBUG_LIST, "Adding client process timer for %C", cptr));
695 cli_freeflag(cptr) |= FREEFLAG_TIMER;
696 timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr),
703 /** Start a connection to another server.
704 * @param aconf Connect block data for target server.
705 * @param by Client who requested the connection (if any).
706 * @return Non-zero on success; zero on failure.
708 int connect_server(struct ConfItem* aconf, struct Client* by)
710 struct Client* cptr = 0;
713 if (aconf->dns_pending) {
714 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s connect DNS pending",
718 Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name,
719 ircd_ntoa(&aconf->address.addr)));
721 if ((cptr = FindClient(aconf->name))) {
722 if (IsServer(cptr) || IsMe(cptr)) {
723 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s already present from %s",
724 aconf->name, cli_name(cli_from(cptr)));
725 if (by && IsUser(by) && !MyUser(by)) {
726 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present "
727 "from %s", by, aconf->name, cli_name(cli_from(cptr)));
731 else if (IsHandshake(cptr) || IsConnecting(cptr)) {
732 if (by && IsUser(by)) {
733 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in "
734 "progress", by, cli_name(cptr));
740 * If we don't know the IP# for this host and it is a hostname and
741 * not a ip# string, then try and find the appropriate host record.
743 if (!irc_in_addr_valid(&aconf->address.addr)
744 && !ircd_aton(&aconf->address.addr, aconf->host)) {
745 char buf[HOSTLEN + 1];
747 host_from_uh(buf, aconf->host, HOSTLEN);
748 gethost_byname(buf, connect_dns_callback, aconf);
749 aconf->dns_pending = 1;
752 cptr = make_client(NULL, STAT_UNKNOWN_SERVER);
755 * Copy these in so we have something for error detection.
757 ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN);
758 ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN);
761 * Attach config entries to client here rather than in
762 * completed_connection. This to avoid null pointer references
764 attach_confs_byhost(cptr, aconf->host, CONF_SERVER);
766 if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) {
767 sendto_opmask_butone(0, SNO_OLDSNO, "Host %s is not enabled for "
768 "connecting: no Connect block", aconf->name);
769 if (by && IsUser(by) && !MyUser(by)) {
770 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no "
771 "Connect block", by, aconf->name);
773 det_confs_butmask(cptr, 0);
778 * attempt to connect to the server in the conf line
780 if (!connect_inet(aconf, cptr)) {
781 if (by && IsUser(by) && !MyUser(by)) {
782 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by,
785 det_confs_butmask(cptr, 0);
790 * NOTE: if we're here we have a valid C:Line and the client should
791 * have started the connection and stored the remote address/port and
792 * ip address name in itself
794 * The socket has been connected or connect is in progress.
797 if (by && IsUser(by)) {
798 ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s",
800 assert(0 == cli_serv(cptr)->user);
801 cli_serv(cptr)->user = cli_user(by);
802 cli_user(by)->refcnt++;
805 *(cli_serv(cptr))->by = '\0';
806 /* strcpy(cptr->serv->by, "Auto"); */
808 cli_serv(cptr)->up = &me;
811 if (cli_fd(cptr) > HighestFd)
812 HighestFd = cli_fd(cptr);
814 LocalClientArray[cli_fd(cptr)] = cptr;
816 Count_newunknown(UserStats);
817 /* Actually we lie, the connect hasn't succeeded yet, but we have a valid
818 * cptr, so we register it now.
819 * Maybe these two calls should be merged.
821 add_client_to_list(cptr);
823 /* nextping = CurrentTime; */
825 return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ?
826 completed_connection(cptr) : 1;
829 /** Find the real hostname for the host running the server (or one which
830 * matches the server's name) and its primary IP#. Hostname is stored
831 * in the client structure passed as a pointer.
833 void init_server_identity(void)
835 const struct LocalConf* conf = conf_get_local();
838 ircd_strncpy(cli_name(&me), conf->name, HOSTLEN);
839 SetYXXServerName(&me, conf->numeric);
842 /** Process events on a client socket.
843 * @param ev Socket event structure that has a struct Connection as
844 * its associated data.
846 static void client_sock_callback(struct Event* ev)
849 struct Connection* con;
853 assert(0 != ev_socket(ev));
854 assert(0 != s_data(ev_socket(ev)));
856 con = (struct Connection*) s_data(ev_socket(ev));
858 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
860 cptr = con_client(con);
862 assert(0 == cptr || con == cli_connect(cptr));
864 switch (ev_type(ev)) {
866 con_freeflag(con) &= ~FREEFLAG_SOCKET;
868 if (!con_freeflag(con) && !cptr)
869 free_connection(con);
872 case ET_CONNECT: /* socket connection completed */
873 if (!completed_connection(cptr) || IsDead(cptr))
874 fallback = cli_info(cptr);
877 case ET_ERROR: /* an error occurred */
878 fallback = cli_info(cptr);
879 cli_error(cptr) = ev_data(ev);
880 if (s_state(&(con_socket(con))) == SS_CONNECTING) {
881 completed_connection(cptr);
882 /* for some reason, the os_get_sockerr() in completed_connect()
883 * can return 0 even when ev_data(ev) indicates a real error, so
884 * re-assign the client error here.
886 cli_error(cptr) = ev_data(ev);
890 case ET_EOF: /* end of file on socket */
891 Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr),
893 SetFlag(cptr, FLAG_DEADSOCKET);
894 if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) {
895 exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)",
896 cli_name(cptr), cli_serv(cptr)->last_error_msg);
899 fmt = "Read error: %s";
900 fallback = "EOF from client";
904 case ET_WRITE: /* socket is writable */
905 ClrFlag(cptr, FLAG_BLOCKED);
906 if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048)
907 list_next_channels(cptr);
908 Debug((DEBUG_SEND, "Sending queued data to %C", cptr));
912 case ET_READ: /* socket is readable */
914 Debug((DEBUG_DEBUG, "Reading data from %C", cptr));
915 if (read_packet(cptr, 1) == 0) /* error while reading packet */
916 fallback = "EOF from client";
921 assert(0 && "Unrecognized socket event in client_sock_callback()");
925 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
928 const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback;
930 msg = "Unknown error";
931 exit_client_msg(cptr, cptr, &me, fmt, msg);
935 /** Process a timer on client socket.
936 * @param ev Timer event that has a struct Connection as its
939 static void client_timer_callback(struct Event* ev)
942 struct Connection* con;
944 assert(0 != ev_timer(ev));
945 assert(0 != t_data(ev_timer(ev)));
946 assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev));
948 con = (struct Connection*) t_data(ev_timer(ev));
950 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
952 cptr = con_client(con);
954 assert(0 == cptr || con == cli_connect(cptr));
956 if (ev_type(ev)== ET_DESTROY) {
957 con_freeflag(con) &= ~FREEFLAG_TIMER; /* timer has expired... */
959 if (!con_freeflag(con) && !cptr)
960 free_connection(con); /* client is being destroyed */
962 Debug((DEBUG_LIST, "Client process timer for %C expired; processing",
964 read_packet(cptr, 0); /* read_packet will re-add timer if needed */
967 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));