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 connections. */
83 struct irc_sockaddr VirtualHost;
84 /** Temporary buffer for reading data from a peer. */
85 static char readbuf[SERVER_TCP_WINDOW];
88 * report_error text constants
90 const char* const ACCEPT_ERROR_MSG = "error accepting connection for %s: %s";
91 const char* const BIND_ERROR_MSG = "bind error for %s: %s";
92 const char* const CONNECT_ERROR_MSG = "connect to host %s failed: %s";
93 const char* const CONNLIMIT_ERROR_MSG = "connect limit exceeded for %s: %s";
94 const char* const LISTEN_ERROR_MSG = "listen error for %s: %s";
95 const char* const NONB_ERROR_MSG = "error setting non-blocking for %s: %s";
96 const char* const PEERNAME_ERROR_MSG = "getpeername failed for %s: %s";
97 const char* const POLL_ERROR_MSG = "poll error for %s: %s";
98 const char* const REGISTER_ERROR_MSG = "registering %s: %s";
99 const char* const REUSEADDR_ERROR_MSG = "error setting SO_REUSEADDR for %s: %s";
100 const char* const SELECT_ERROR_MSG = "select error for %s: %s";
101 const char* const SETBUFS_ERROR_MSG = "error setting buffer size for %s: %s";
102 const char* const SOCKET_ERROR_MSG = "error creating socket for %s: %s";
103 const char* const TOS_ERROR_MSG = "error setting TOS for %s: %s";
106 static void client_sock_callback(struct Event* ev);
107 static void client_timer_callback(struct Event* ev);
109 #if !defined(USE_POLL)
110 #if FD_SETSIZE < (MAXCONNECTIONS + 4)
114 * All operating systems work when MAXCONNECTIONS <= 252.
115 * Most operating systems work when MAXCONNECTIONS <= 1020 and FD_SETSIZE is
116 * updated correctly in the system headers (on BSD systems our sys.h has
117 * defined FD_SETSIZE to MAXCONNECTIONS+4 before including the system's headers
118 * but sys/types.h might have abruptly redefined it so the check is still
119 * done), you might already need to recompile your kernel.
120 * For larger FD_SETSIZE your milage may vary (kernel patches may be needed).
121 * The check is _NOT_ done if we will not use FD_SETS at all (USE_POLL)
123 #error "FD_SETSIZE is too small or MAXCONNECTIONS too large."
129 * Cannot use perror() within daemon. stderr is closed in
130 * ircd and cannot be used. And, worse yet, it might have
131 * been reassigned to a normal connection...
134 /** Replacement for perror(). Record error to log. Send a copy to all
135 * *LOCAL* opers, but only if no errors were sent to them in the last
137 * @param text A *format* string for outputting error. It must contain
138 * only two '%s', the first will be replaced by the sockhost from the
139 * cptr, and the latter will be taken from sys_errlist[errno].
140 * @param who The client associated with the error.
141 * @param err The errno value to display.
143 void report_error(const char* text, const char* who, int err)
145 static time_t last_notice = 0;
146 int errtmp = errno; /* debug may change 'errno' */
147 const char* errmsg = (err) ? strerror(err) : "";
150 errmsg = "Unknown error";
152 if (EmptyString(who))
155 if (last_notice + 20 < CurrentTime) {
157 * pace error messages so opers don't get flooded by transients
159 sendto_opmask_butone(0, SNO_OLDSNO, text, who, errmsg);
160 last_notice = CurrentTime;
162 log_write(LS_SOCKET, L_ERROR, 0, text, who, errmsg);
167 /** Called when resolver query finishes. If the DNS lookup was
168 * successful, start the connection; otherwise notify opers of the
170 * @param vptr The struct ConfItem representing the Connect block.
171 * @param hp A pointer to the DNS lookup results (NULL on failure).
173 static void connect_dns_callback(void* vptr, struct DNSReply* hp)
175 struct ConfItem* aconf = (struct ConfItem*) vptr;
177 aconf->dns_pending = 0;
179 memcpy(&aconf->address, &hp->addr, sizeof(aconf->address));
181 connect_server(aconf, 0);
184 sendto_opmask_butone(0, SNO_OLDSNO, "Connect to %s failed: host lookup",
188 /** Closes all file descriptors.
189 * @param close_stderr If non-zero, also close stderr.
191 void close_connections(int close_stderr)
198 for (i = 3; i < MAXCONNECTIONS; ++i)
202 /** Initialize process fd limit to MAXCONNECTIONS.
204 int init_connection_limits(void)
206 int limit = os_set_fdlimit(MAXCONNECTIONS);
210 fprintf(stderr, "error setting max fd's to %d\n", limit);
212 else if (limit > 0) {
213 fprintf(stderr, "ircd fd table too big\nHard Limit: %d IRC max: %d\n",
214 limit, MAXCONNECTIONS);
215 fprintf(stderr, "set MAXCONNECTIONS to a smaller value");
220 /** Set up address and port and make a connection.
221 * @param aconf Provides the connection information.
222 * @param cptr Client structure for the peer.
223 * @return Non-zero on success; zero on failure.
225 static int connect_inet(struct ConfItem* aconf, struct Client* cptr)
227 const struct irc_sockaddr *local;
232 * Might as well get sockhost from here, the connection is attempted
233 * with it so if it fails its useless.
235 if (irc_in_addr_valid(&aconf->origin.addr))
236 local = &aconf->origin;
238 local = &VirtualHost;
239 cli_fd(cptr) = os_socket(local, SOCK_STREAM, cli_name(cptr));
240 if (cli_fd(cptr) < 0)
244 * save connection info in client
246 memcpy(&cli_ip(cptr), &aconf->address.addr, sizeof(cli_ip(cptr)));
247 ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr));
249 * we want a big buffer for server connections
251 if (!os_set_sockbufs(cli_fd(cptr), feature_int(FEAT_SOCKSENDBUF), feature_int(FEAT_SOCKRECVBUF))) {
252 cli_error(cptr) = errno;
253 report_error(SETBUFS_ERROR_MSG, cli_name(cptr), errno);
258 if ((result = os_connect_nonb(cli_fd(cptr), &aconf->address)) == IO_FAILURE) {
259 cli_error(cptr) = errno;
260 report_error(CONNECT_ERROR_MSG, cli_name(cptr), errno);
265 if (!socket_add(&(cli_socket(cptr)), client_sock_callback,
266 (void*) cli_connect(cptr),
267 (result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING,
268 SOCK_EVENT_READABLE, cli_fd(cptr))) {
269 cli_error(cptr) = ENFILE;
270 report_error(REGISTER_ERROR_MSG, cli_name(cptr), ENFILE);
275 cli_freeflag(cptr) |= FREEFLAG_SOCKET;
279 /** Attempt to send a sequence of bytes to the connection.
280 * As a side effect, updates \a cptr's FLAG_BLOCKED setting
281 * and sendB/sendK fields.
282 * @param cptr Client that should receive data.
283 * @param buf Message buffer to send to client.
284 * @return Negative on connection-fatal error; otherwise
285 * number of bytes sent.
287 unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
289 unsigned int bytes_written = 0;
290 unsigned int bytes_count = 0;
293 switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
295 ClrFlag(cptr, FLAG_BLOCKED);
297 cli_sendB(cptr) += bytes_written;
298 cli_sendB(&me) += bytes_written;
299 /* A partial write implies that future writes will block. */
300 if (bytes_written < bytes_count)
301 SetFlag(cptr, FLAG_BLOCKED);
304 SetFlag(cptr, FLAG_BLOCKED);
307 cli_error(cptr) = errno;
308 SetFlag(cptr, FLAG_DEADSOCKET);
311 return bytes_written;
314 /** Free the client's DNS reply, if any.
315 * @param cptr Client to operate on.
317 void release_dns_reply(struct Client* cptr)
320 assert(MyConnect(cptr));
322 if (cli_dns_reply(cptr)) {
323 MyFree(cli_dns_reply(cptr)->h_name);
324 MyFree(cli_dns_reply(cptr));
325 cli_dns_reply(cptr) = 0;
329 /** Complete non-blocking connect()-sequence. Check access and
330 * terminate connection, if trouble detected.
331 * @param cptr Client to which we have connected, with all Confitem structs attached.
332 * @return Zero on failure (caller should exit_client()), non-zero on success.
334 static int completed_connection(struct Client* cptr)
336 struct ConfItem *aconf;
338 struct Client *acptr;
344 * get the socket status from the fd first to check if
345 * connection actually succeeded
347 if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
348 const char* msg = strerror(cli_error(cptr));
350 msg = "Unknown error";
351 sendto_opmask_butone(0, SNO_OLDSNO, "Connection failed to %s: %s",
352 cli_name(cptr), msg);
355 if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
356 sendto_opmask_butone(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
359 if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
360 socket_state(&(cli_socket(cptr)), SS_CONNECTED);
362 if (!EmptyString(aconf->passwd))
363 sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
366 * Create a unique timestamp
369 for (i = HighestFd; i > -1; --i) {
370 if ((acptr = LocalClientArray[i]) &&
371 (IsServer(acptr) || IsHandshake(acptr))) {
372 if (cli_serv(acptr)->timestamp >= newts)
373 newts = cli_serv(acptr)->timestamp + 1;
376 assert(0 != cli_serv(cptr));
378 cli_serv(cptr)->timestamp = newts;
381 * Make us timeout after twice the timeout for DNS look ups
383 cli_lasttime(cptr) = CurrentTime;
384 SetFlag(cptr, FLAG_PINGSENT);
386 sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
387 cli_name(&me), cli_serv(&me)->timestamp, newts,
388 MAJOR_PROTOCOL, NumServCap(&me),
389 feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
391 return (IsDead(cptr)) ? 0 : 1;
394 /** Close the physical connection. Side effects: MyConnect(cptr)
395 * becomes false and cptr->from becomes NULL.
396 * @param cptr Client to disconnect.
398 void close_connection(struct Client *cptr)
400 struct ConfItem* aconf;
402 if (IsServer(cptr)) {
403 ServerStats->is_sv++;
404 ServerStats->is_sbs += cli_sendB(cptr);
405 ServerStats->is_sbr += cli_receiveB(cptr);
406 ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
408 * If the connection has been up for a long amount of time, schedule
409 * a 'quick' reconnect, else reset the next-connect cycle.
411 if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
413 * Reschedule a faster reconnect, if this was a automaticly
414 * connected configuration entry. (Note that if we have had
415 * a rehash in between, the status has been changed to
416 * CONF_ILLEGAL). But only do this if it was a "good" link.
418 aconf->hold = CurrentTime;
419 aconf->hold += ((aconf->hold - cli_since(cptr) >
420 feature_int(FEAT_HANGONGOODLINK)) ?
421 feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
422 /* if (nextconnect > aconf->hold) */
423 /* nextconnect = aconf->hold; */
426 else if (IsUser(cptr)) {
427 ServerStats->is_cl++;
428 ServerStats->is_cbs += cli_sendB(cptr);
429 ServerStats->is_cbr += cli_receiveB(cptr);
430 ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
433 ServerStats->is_ni++;
435 if (-1 < cli_fd(cptr)) {
436 flush_connections(cptr);
437 LocalClientArray[cli_fd(cptr)] = 0;
439 socket_del(&(cli_socket(cptr))); /* queue a socket delete */
442 SetFlag(cptr, FLAG_DEADSOCKET);
444 MsgQClear(&(cli_sendQ(cptr)));
445 client_drop_sendq(cli_connect(cptr));
446 DBufClear(&(cli_recvQ(cptr)));
447 memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
448 set_snomask(cptr, 0, SNO_SET);
450 det_confs_butmask(cptr, 0);
452 if (cli_listener(cptr)) {
453 release_listener(cli_listener(cptr));
454 cli_listener(cptr) = 0;
457 for ( ; HighestFd > 0; --HighestFd) {
458 if (LocalClientArray[HighestFd])
463 /** Close all unregistered connections.
464 * @param source Oper who requested the close.
465 * @return Number of closed connections.
467 int net_close_unregistered_connections(struct Client* source)
474 for (i = HighestFd; i > 0; --i) {
475 if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
476 send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
477 exit_client(source, cptr, &me, "Oper Closing");
484 /** Creates a client which has just connected to us on the given fd.
485 * The sockhost field is initialized with the ip# of the host.
486 * The client is not added to the linked list of clients, it is
487 * passed off to the auth handler for dns and ident queries.
488 * @param listener Listening socket that received the connection.
489 * @param fd File descriptor of new connection.
491 void add_connection(struct Listener* listener, int fd) {
492 struct irc_sockaddr addr;
493 struct Client *new_client;
494 time_t next_target = 0;
496 const char* const throttle_message =
497 "ERROR :Your host is trying to (re)connect too fast -- throttled\r\n";
498 /* 12345678901234567890123456789012345679012345678901234567890123456 */
499 const char* const register_message =
500 "ERROR :Unable to complete your registration\r\n";
502 assert(0 != listener);
505 * Removed preliminary access check. Full check is performed in m_server and
506 * m_user instead. Also connection time out help to get rid of unwanted
509 if (!os_get_peername(fd, &addr) || !os_set_nonblocking(fd)) {
510 ++ServerStats->is_ref;
515 * Disable IP (*not* TCP) options. In particular, this makes it impossible
516 * to use source routing to connect to the server. If we didn't do this
517 * (and if intermediate networks didn't drop source-routed packets), an
518 * attacker could successfully IP spoof us...and even return the anti-spoof
519 * ping, because the options would cause the packet to be routed back to
520 * the spoofer's machine. When we disable the IP options, we delete the
521 * source route, and the normal routing takes over.
523 os_disable_options(fd);
526 * Add this local client to the IPcheck registry.
528 * If they're throttled, murder them, but tell them why first.
530 if (!IPcheck_local_connect(&addr.addr, &next_target) && !listener->server)
532 ++ServerStats->is_ref;
533 write(fd, throttle_message, strlen(throttle_message));
538 new_client = make_client(0, ((listener->server) ?
539 STAT_UNKNOWN_SERVER : STAT_UNKNOWN_USER));
542 * Copy ascii address to 'sockhost' just in case. Then we have something
543 * valid to put into error messages...
545 SetIPChecked(new_client);
546 ircd_ntoa_r(cli_sock_ip(new_client), &addr.addr);
547 strcpy(cli_sockhost(new_client), cli_sock_ip(new_client));
548 memcpy(&cli_ip(new_client), &addr.addr, sizeof(cli_ip(new_client)));
551 cli_nexttarget(new_client) = next_target;
553 cli_fd(new_client) = fd;
554 if (!socket_add(&(cli_socket(new_client)), client_sock_callback,
555 (void*) cli_connect(new_client), SS_CONNECTED, 0, fd)) {
556 ++ServerStats->is_ref;
557 write(fd, register_message, strlen(register_message));
559 cli_fd(new_client) = -1;
562 cli_freeflag(new_client) |= FREEFLAG_SOCKET;
563 cli_listener(new_client) = listener;
564 ++listener->ref_count;
566 Count_newunknown(UserStats);
567 /* if we've made it this far we can put the client on the auth query pile */
568 start_auth(new_client);
571 /** Determines whether to tell the events engine we're interested in
573 * @param cptr Client for which to decide this.
575 void update_write(struct Client* cptr)
577 /* If there are messages that need to be sent along, or if the client
578 * is in the middle of a /list, then we need to tell the engine that
579 * we're interested in writable events--otherwise, we need to drop
582 socket_events(&(cli_socket(cptr)),
583 ((MsgQLength(&cli_sendQ(cptr)) || cli_listing(cptr)) ?
584 SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE);
587 /** Read a 'packet' of data from a connection and process it. Read in
588 * 8k chunks to give a better performance rating (for server
589 * connections). Do some tricky stuff for client connections to make
590 * sure they don't do any flooding >:-) -avalon
591 * @param cptr Client from which to read data.
592 * @param socket_ready If non-zero, more data can be read from the client's socket.
593 * @return Positive number on success, zero on connection-fatal failure, negative
596 static int read_packet(struct Client *cptr, int socket_ready)
598 unsigned int dolen = 0;
599 unsigned int length = 0;
603 DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))) {
604 switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) {
609 cli_lasttime(cptr) = CurrentTime;
610 if (cli_lasttime(cptr) > cli_since(cptr))
611 cli_since(cptr) = cli_lasttime(cptr);
612 ClrFlag(cptr, FLAG_PINGSENT);
613 ClrFlag(cptr, FLAG_NONL);
619 cli_error(cptr) = errno;
620 /* SetFlag(cpt, FLAG_DEADSOCKET); */
626 * For server connections, we process as many as we can without
627 * worrying about the time of day or anything :)
629 if (length > 0 && IsServer(cptr))
630 return server_dopacket(cptr, readbuf, length);
631 else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr)))
632 return connect_dopacket(cptr, readbuf, length);
636 * Before we even think of parsing what we just read, stick
637 * it on the end of the receive queue and do it when its
640 if (length > 0 && dbuf_put(&(cli_recvQ(cptr)), readbuf, length) == 0)
641 return exit_client(cptr, cptr, &me, "dbuf_put fail");
643 if (DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))
644 return exit_client(cptr, cptr, &me, "Excess Flood");
646 while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
647 (IsTrusted(cptr) || cli_since(cptr) - CurrentTime < 10))
649 dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE);
651 * Devious looking...whats it do ? well..if a client
652 * sends a *long* message without any CR or LF, then
653 * dbuf_getmsg fails and we pull it out using this
654 * loop which just gets the next 512 bytes and then
655 * deletes the rest of the buffer contents.
660 if (DBufLength(&(cli_recvQ(cptr))) < 510)
661 SetFlag(cptr, FLAG_NONL);
663 DBufClear(&(cli_recvQ(cptr)));
665 else if (client_dopacket(cptr, dolen) == CPTR_KILLED)
668 * If it has become registered as a Server
669 * then skip the per-message parsing below.
671 if (IsHandshake(cptr) || IsServer(cptr))
675 dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf));
680 if (DBufLength(&(cli_recvQ(cptr))) < 510)
681 SetFlag(cptr, FLAG_NONL);
683 DBufClear(&(cli_recvQ(cptr)));
685 else if ((IsServer(cptr) &&
686 server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) ||
688 connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED))
694 /* If there's still data to process, wait 2 seconds first */
695 if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
696 !t_onqueue(&(cli_proc(cptr))))
698 Debug((DEBUG_LIST, "Adding client process timer for %C", cptr));
699 cli_freeflag(cptr) |= FREEFLAG_TIMER;
700 timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr),
707 /** Start a connection to another server.
708 * @param aconf Connect block data for target server.
709 * @param by Client who requested the connection (if any).
710 * @return Non-zero on success; zero on failure.
712 int connect_server(struct ConfItem* aconf, struct Client* by)
714 struct Client* cptr = 0;
717 if (aconf->dns_pending) {
718 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s connect DNS pending",
722 Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name,
723 ircd_ntoa(&aconf->address.addr)));
725 if ((cptr = FindClient(aconf->name))) {
726 if (IsServer(cptr) || IsMe(cptr)) {
727 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s already present from %s",
728 aconf->name, cli_name(cli_from(cptr)));
729 if (by && IsUser(by) && !MyUser(by)) {
730 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present "
731 "from %s", by, aconf->name, cli_name(cli_from(cptr)));
735 else if (IsHandshake(cptr) || IsConnecting(cptr)) {
736 if (by && IsUser(by)) {
737 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in "
738 "progress", by, cli_name(cptr));
744 * If we dont know the IP# for this host and it is a hostname and
745 * not a ip# string, then try and find the appropriate host record.
747 if (!irc_in_addr_valid(&aconf->address.addr)
748 && !ircd_aton(&aconf->address.addr, aconf->host)) {
749 char buf[HOSTLEN + 1];
750 struct DNSQuery query;
753 query.callback = connect_dns_callback;
754 host_from_uh(buf, aconf->host, HOSTLEN);
757 gethost_byname(buf, &query);
758 aconf->dns_pending = 1;
761 cptr = make_client(NULL, STAT_UNKNOWN_SERVER);
764 * Copy these in so we have something for error detection.
766 ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN);
767 ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN);
770 * Attach config entries to client here rather than in
771 * completed_connection. This to avoid null pointer references
773 attach_confs_byhost(cptr, aconf->host, CONF_SERVER);
775 if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) {
776 sendto_opmask_butone(0, SNO_OLDSNO, "Host %s is not enabled for "
777 "connecting: no C-line", aconf->name);
778 if (by && IsUser(by) && !MyUser(by)) {
779 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no "
780 "C-line", by, aconf->name);
782 det_confs_butmask(cptr, 0);
787 * attempt to connect to the server in the conf line
789 if (!connect_inet(aconf, cptr)) {
790 if (by && IsUser(by) && !MyUser(by)) {
791 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by,
794 det_confs_butmask(cptr, 0);
799 * NOTE: if we're here we have a valid C:Line and the client should
800 * have started the connection and stored the remote address/port and
801 * ip address name in itself
803 * The socket has been connected or connect is in progress.
806 if (by && IsUser(by)) {
807 ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s",
809 assert(0 == cli_serv(cptr)->user);
810 cli_serv(cptr)->user = cli_user(by);
811 cli_user(by)->refcnt++;
814 *(cli_serv(cptr))->by = '\0';
815 /* strcpy(cptr->serv->by, "Auto"); */
817 cli_serv(cptr)->up = &me;
820 if (cli_fd(cptr) > HighestFd)
821 HighestFd = cli_fd(cptr);
823 LocalClientArray[cli_fd(cptr)] = cptr;
825 Count_newunknown(UserStats);
826 /* Actually we lie, the connect hasn't succeeded yet, but we have a valid
827 * cptr, so we register it now.
828 * Maybe these two calls should be merged.
830 add_client_to_list(cptr);
832 /* nextping = CurrentTime; */
834 return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ?
835 completed_connection(cptr) : 1;
838 /** Find the real hostname for the host running the server (or one which
839 * matches the server's name) and its primary IP#. Hostname is stored
840 * in the client structure passed as a pointer.
842 void init_server_identity(void)
844 const struct LocalConf* conf = conf_get_local();
847 ircd_strncpy(cli_name(&me), conf->name, HOSTLEN);
848 SetYXXServerName(&me, conf->numeric);
851 /** Process events on a client socket.
852 * @param ev Socket event structure that has a struct Connection as
853 * its associated data.
855 static void client_sock_callback(struct Event* ev)
858 struct Connection* con;
862 assert(0 != ev_socket(ev));
863 assert(0 != s_data(ev_socket(ev)));
865 con = (struct Connection*) s_data(ev_socket(ev));
867 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
869 cptr = con_client(con);
871 assert(0 == cptr || con == cli_connect(cptr));
873 switch (ev_type(ev)) {
875 con_freeflag(con) &= ~FREEFLAG_SOCKET;
877 if (!con_freeflag(con) && !cptr)
878 free_connection(con);
881 case ET_CONNECT: /* socket connection completed */
882 if (!completed_connection(cptr) || IsDead(cptr))
883 fallback = cli_info(cptr);
886 case ET_ERROR: /* an error occurred */
887 fallback = cli_info(cptr);
888 cli_error(cptr) = ev_data(ev);
889 if (s_state(&(con_socket(con))) == SS_CONNECTING) {
890 completed_connection(cptr);
894 case ET_EOF: /* end of file on socket */
895 Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr),
897 SetFlag(cptr, FLAG_DEADSOCKET);
898 if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) {
899 exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)",
900 cli_name(cptr), cli_serv(cptr)->last_error_msg);
903 fmt = "Read error: %s";
904 fallback = "EOF from client";
908 case ET_WRITE: /* socket is writable */
909 ClrFlag(cptr, FLAG_BLOCKED);
910 if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048)
911 list_next_channels(cptr);
912 Debug((DEBUG_SEND, "Sending queued data to %C", cptr));
916 case ET_READ: /* socket is readable */
918 Debug((DEBUG_DEBUG, "Reading data from %C", cptr));
919 if (read_packet(cptr, 1) == 0) /* error while reading packet */
920 fallback = "EOF from client";
925 assert(0 && "Unrecognized socket event in client_sock_callback()");
929 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
932 const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback;
934 msg = "Unknown error";
935 exit_client_msg(cptr, cptr, &me, fmt, msg);
939 /** Process a timer on client socket.
940 * @param ev Timer event that has a struct Connection as its
943 static void client_timer_callback(struct Event* ev)
946 struct Connection* con;
948 assert(0 != ev_timer(ev));
949 assert(0 != t_data(ev_timer(ev)));
950 assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev));
952 con = (struct Connection*) t_data(ev_timer(ev));
954 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
956 cptr = con_client(con);
958 assert(0 == cptr || con == cli_connect(cptr));
960 if (ev_type(ev)== ET_DESTROY) {
961 con_freeflag(con) &= ~FREEFLAG_TIMER; /* timer has expired... */
963 if (!con_freeflag(con) && !cptr)
964 free_connection(con); /* client is being destroyed */
966 Debug((DEBUG_LIST, "Client process timer for %C expired; processing",
968 read_packet(cptr, 0); /* read_packet will re-add timer if needed */
971 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));