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>
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 sendto_opmask_butone_ratelimited(0, SNO_OLDSNO, &last_notice, text, who, errmsg);
136 log_write(LS_SOCKET, L_ERROR, 0, text, who, errmsg);
141 /** Called when resolver query finishes. If the DNS lookup was
142 * successful, start the connection; otherwise notify opers of the
144 * @param vptr The struct ConfItem representing the Connect block.
145 * @param hp A pointer to the DNS lookup results (NULL on failure).
147 static void connect_dns_callback(void* vptr, const struct irc_in_addr *addr, const char *h_name)
149 struct ConfItem* aconf = (struct ConfItem*) vptr;
151 aconf->dns_pending = 0;
153 memcpy(&aconf->address, addr, sizeof(aconf->address));
154 connect_server(aconf, 0);
157 sendto_opmask_butone(0, SNO_OLDSNO, "Connect to %s failed: host lookup",
161 /** Closes all file descriptors.
162 * @param close_stderr If non-zero, also close stderr.
164 void close_connections(int close_stderr)
173 for (i = 3; i < MAXCONNECTIONS; ++i)
177 /** Initialize process fd limit to MAXCONNECTIONS.
179 int init_connection_limits(void)
181 int limit = os_set_fdlimit(MAXCONNECTIONS);
185 fprintf(stderr, "error setting max fd's to %d\n", limit);
187 else if (limit > 0) {
188 fprintf(stderr, "ircd fd table too big\nHard Limit: %d IRC max: %d\n",
189 limit, MAXCONNECTIONS);
190 fprintf(stderr, "set MAXCONNECTIONS to a smaller value");
195 /** Set up address and port and make a connection.
196 * @param aconf Provides the connection information.
197 * @param cptr Client structure for the peer.
198 * @return Non-zero on success; zero on failure.
200 static int connect_inet(struct ConfItem* aconf, struct Client* cptr)
202 const struct irc_sockaddr *local;
209 * Might as well get sockhost from here, the connection is attempted
210 * with it so if it fails its useless.
212 if (irc_in_addr_valid(&aconf->origin.addr))
213 local = &aconf->origin;
214 else if (irc_in_addr_is_ipv4(&aconf->address.addr)) {
215 local = &VirtualHost_v4;
218 local = &VirtualHost_v6;
219 cli_fd(cptr) = os_socket(local, SOCK_STREAM, cli_name(cptr), family);
220 if (cli_fd(cptr) < 0)
224 * save connection info in client
226 memcpy(&cli_ip(cptr), &aconf->address.addr, sizeof(cli_ip(cptr)));
227 ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr));
229 * we want a big buffer for server connections
231 if (!os_set_sockbufs(cli_fd(cptr), feature_int(FEAT_SOCKSENDBUF), feature_int(FEAT_SOCKRECVBUF))) {
232 cli_error(cptr) = errno;
233 report_error(SETBUFS_ERROR_MSG, cli_name(cptr), errno);
239 * Set the TOS bits - this is nonfatal if it doesn't stick.
241 if (!os_set_tos(cli_fd(cptr), FEAT_TOS_SERVER)) {
242 report_error(TOS_ERROR_MSG, cli_name(cptr), errno);
244 if ((result = os_connect_nonb(cli_fd(cptr), &aconf->address)) == IO_FAILURE) {
245 cli_error(cptr) = errno;
246 report_error(CONNECT_ERROR_MSG, cli_name(cptr), errno);
251 if (!socket_add(&(cli_socket(cptr)), client_sock_callback,
252 (void*) cli_connect(cptr),
253 (result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING,
254 SOCK_EVENT_READABLE, cli_fd(cptr))) {
255 cli_error(cptr) = ENFILE;
256 report_error(REGISTER_ERROR_MSG, cli_name(cptr), ENFILE);
261 cli_freeflag(cptr) |= FREEFLAG_SOCKET;
265 /** Attempt to send a sequence of bytes to the connection.
266 * As a side effect, updates \a cptr's FLAG_BLOCKED setting
267 * and sendB/sendK fields.
268 * @param cptr Client that should receive data.
269 * @param buf Message buffer to send to client.
270 * @return Negative on connection-fatal error; otherwise
271 * number of bytes sent.
273 unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
275 unsigned int bytes_written = 0;
276 unsigned int bytes_count = 0;
279 switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
281 ClrFlag(cptr, FLAG_BLOCKED);
283 cli_sendB(cptr) += bytes_written;
284 cli_sendB(&me) += bytes_written;
285 /* A partial write implies that future writes will block. */
286 if (bytes_written < bytes_count)
287 SetFlag(cptr, FLAG_BLOCKED);
290 SetFlag(cptr, FLAG_BLOCKED);
293 cli_error(cptr) = errno;
294 SetFlag(cptr, FLAG_DEADSOCKET);
297 return bytes_written;
300 /** Complete non-blocking connect()-sequence. Check access and
301 * terminate connection, if trouble detected.
302 * @param cptr Client to which we have connected, with all ConfItem structs attached.
303 * @return Zero on failure (caller should exit_client()), non-zero on success.
305 static int completed_connection(struct Client* cptr)
307 struct ConfItem *aconf;
309 struct Client *acptr;
315 * get the socket status from the fd first to check if
316 * connection actually succeeded
318 if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
319 const char* msg = strerror(cli_error(cptr));
321 msg = "Unknown error";
322 sendto_opmask_butone(0, SNO_OLDSNO, "Connection failed to %s: %s",
323 cli_name(cptr), msg);
326 if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
327 sendto_opmask_butone(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
330 if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
331 socket_state(&(cli_socket(cptr)), SS_CONNECTED);
333 if (!EmptyString(aconf->passwd))
334 sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
337 * Create a unique timestamp
340 for (i = HighestFd; i > -1; --i) {
341 if ((acptr = LocalClientArray[i]) &&
342 (IsServer(acptr) || IsHandshake(acptr))) {
343 if (cli_serv(acptr)->timestamp >= newts)
344 newts = cli_serv(acptr)->timestamp + 1;
347 assert(0 != cli_serv(cptr));
349 cli_serv(cptr)->timestamp = newts;
352 * Make us timeout after twice the timeout for DNS look ups
354 cli_lasttime(cptr) = CurrentTime;
357 sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
358 cli_name(&me), cli_serv(&me)->timestamp, newts,
359 MAJOR_PROTOCOL, NumServCap(&me),
360 feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
362 return (IsDead(cptr)) ? 0 : 1;
365 /** Close the physical connection. Side effects: MyConnect(cptr)
366 * becomes false and cptr->from becomes NULL.
367 * @param cptr Client to disconnect.
369 void close_connection(struct Client *cptr)
371 struct ConfItem* aconf;
373 if (IsServer(cptr)) {
374 ServerStats->is_sv++;
375 ServerStats->is_sbs += cli_sendB(cptr);
376 ServerStats->is_sbr += cli_receiveB(cptr);
377 ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
379 * If the connection has been up for a long amount of time, schedule
380 * a 'quick' reconnect, else reset the next-connect cycle.
382 if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
384 * Reschedule a faster reconnect, if this was a automatically
385 * connected configuration entry. (Note that if we have had
386 * a rehash in between, the status has been changed to
387 * CONF_ILLEGAL). But only do this if it was a "good" link.
389 aconf->hold = CurrentTime;
390 aconf->hold += ((aconf->hold - cli_since(cptr) >
391 feature_int(FEAT_HANGONGOODLINK)) ?
392 feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
393 /* if (nextconnect > aconf->hold) */
394 /* nextconnect = aconf->hold; */
397 else if (IsUser(cptr)) {
398 ServerStats->is_cl++;
399 ServerStats->is_cbs += cli_sendB(cptr);
400 ServerStats->is_cbr += cli_receiveB(cptr);
401 ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
404 ServerStats->is_ni++;
406 if (-1 < cli_fd(cptr)) {
407 flush_connections(cptr);
408 LocalClientArray[cli_fd(cptr)] = 0;
410 socket_del(&(cli_socket(cptr))); /* queue a socket delete */
413 SetFlag(cptr, FLAG_DEADSOCKET);
415 MsgQClear(&(cli_sendQ(cptr)));
416 client_drop_sendq(cli_connect(cptr));
417 DBufClear(&(cli_recvQ(cptr)));
418 memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
419 set_snomask(cptr, 0, SNO_SET);
421 det_confs_butmask(cptr, 0);
423 if (cli_listener(cptr)) {
424 release_listener(cli_listener(cptr));
425 cli_listener(cptr) = 0;
428 for ( ; HighestFd > 0; --HighestFd) {
429 if (LocalClientArray[HighestFd])
434 /** Close all unregistered connections.
435 * @param source Oper who requested the close.
436 * @return Number of closed connections.
438 int net_close_unregistered_connections(struct Client* source)
445 for (i = HighestFd; i > 0; --i) {
446 if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
447 send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
448 exit_client(source, cptr, &me, "Oper Closing");
455 /** Creates a client which has just connected to us on the given fd.
456 * The sockhost field is initialized with the ip# of the host.
457 * The client is not added to the linked list of clients, it is
458 * passed off to the auth handler for dns and ident queries.
459 * @param listener Listening socket that received the connection.
460 * @param fd File descriptor of new connection.
462 void add_connection(struct Listener* listener, int fd) {
463 struct irc_sockaddr addr;
464 struct Client *new_client;
465 time_t next_target = 0;
467 const char* const throttle_message =
468 "ERROR :Your host is trying to (re)connect too fast -- throttled\r\n";
469 /* 12345678901234567890123456789012345679012345678901234567890123456 */
470 const char* const register_message =
471 "ERROR :Unable to complete your registration\r\n";
473 assert(0 != listener);
476 * Removed preliminary access check. Full check is performed in m_server and
477 * m_user instead. Also connection time out help to get rid of unwanted
480 if (!os_get_peername(fd, &addr) || !os_set_nonblocking(fd)) {
481 ++ServerStats->is_ref;
486 * Disable IP (*not* TCP) options. In particular, this makes it impossible
487 * to use source routing to connect to the server. If we didn't do this
488 * (and if intermediate networks didn't drop source-routed packets), an
489 * attacker could successfully IP spoof us...and even return the anti-spoof
490 * ping, because the options would cause the packet to be routed back to
491 * the spoofer's machine. When we disable the IP options, we delete the
492 * source route, and the normal routing takes over.
494 os_disable_options(fd);
496 if (listener_server(listener))
498 new_client = make_client(0, STAT_UNKNOWN_SERVER);
503 * Add this local client to the IPcheck registry.
505 * If they're throttled, murder them, but tell them why first.
507 if (!IPcheck_local_connect(&addr.addr, &next_target))
509 ++ServerStats->is_ref;
510 write(fd, throttle_message, strlen(throttle_message));
514 new_client = make_client(0, STAT_UNKNOWN_USER);
515 SetIPChecked(new_client);
519 * Copy ascii address to 'sockhost' just in case. Then we have something
520 * valid to put into error messages...
522 ircd_ntoa_r(cli_sock_ip(new_client), &addr.addr);
523 strcpy(cli_sockhost(new_client), cli_sock_ip(new_client));
524 memcpy(&cli_ip(new_client), &addr.addr, sizeof(cli_ip(new_client)));
527 cli_nexttarget(new_client) = next_target;
529 cli_fd(new_client) = fd;
530 if (!socket_add(&(cli_socket(new_client)), client_sock_callback,
531 (void*) cli_connect(new_client), SS_CONNECTED, 0, fd)) {
532 ++ServerStats->is_ref;
533 write(fd, register_message, strlen(register_message));
535 cli_fd(new_client) = -1;
538 cli_freeflag(new_client) |= FREEFLAG_SOCKET;
539 cli_listener(new_client) = listener;
540 ++listener->ref_count;
542 Count_newunknown(UserStats);
543 /* if we've made it this far we can put the client on the auth query pile */
544 start_auth(new_client);
547 /** Determines whether to tell the events engine we're interested in
549 * @param cptr Client for which to decide this.
551 void update_write(struct Client* cptr)
553 /* If there are messages that need to be sent along, or if the client
554 * is in the middle of a /list, then we need to tell the engine that
555 * we're interested in writable events--otherwise, we need to drop
558 socket_events(&(cli_socket(cptr)),
559 ((MsgQLength(&cli_sendQ(cptr)) || cli_listing(cptr)) ?
560 SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE);
563 /** Read a 'packet' of data from a connection and process it. Read in
564 * 8k chunks to give a better performance rating (for server
565 * connections). Do some tricky stuff for client connections to make
566 * sure they don't do any flooding >:-) -avalon
567 * @param cptr Client from which to read data.
568 * @param socket_ready If non-zero, more data can be read from the client's socket.
569 * @return Positive number on success, zero on connection-fatal failure, negative
572 static int read_packet(struct Client *cptr, int socket_ready)
574 unsigned int dolen = 0;
575 unsigned int length = 0;
579 DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))) {
580 switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) {
584 cli_lasttime(cptr) = CurrentTime;
586 ClrFlag(cptr, FLAG_NONL);
587 if (cli_lasttime(cptr) > cli_since(cptr))
588 cli_since(cptr) = cli_lasttime(cptr);
594 cli_error(cptr) = errno;
595 /* SetFlag(cptr, FLAG_DEADSOCKET); */
601 * For server connections, we process as many as we can without
602 * worrying about the time of day or anything :)
604 if (length > 0 && IsServer(cptr))
605 return server_dopacket(cptr, readbuf, length);
606 else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr)))
607 return connect_dopacket(cptr, readbuf, length);
611 * Before we even think of parsing what we just read, stick
612 * it on the end of the receive queue and do it when its
615 if (length > 0 && dbuf_put(&(cli_recvQ(cptr)), readbuf, length) == 0)
616 return exit_client(cptr, cptr, &me, "dbuf_put fail");
618 if (DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))
619 return exit_client(cptr, cptr, &me, "Excess Flood");
621 while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
622 (IsTrusted(cptr) || cli_since(cptr) - CurrentTime < 10))
624 dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE);
626 * Devious looking...whats it do ? well..if a client
627 * sends a *long* message without any CR or LF, then
628 * dbuf_getmsg fails and we pull it out using this
629 * loop which just gets the next 512 bytes and then
630 * deletes the rest of the buffer contents.
635 if (DBufLength(&(cli_recvQ(cptr))) < 510)
636 SetFlag(cptr, FLAG_NONL);
638 DBufClear(&(cli_recvQ(cptr)));
640 else if (client_dopacket(cptr, dolen) == CPTR_KILLED)
643 * If it has become registered as a Server
644 * then skip the per-message parsing below.
646 if (IsHandshake(cptr) || IsServer(cptr))
650 dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf));
655 if (DBufLength(&(cli_recvQ(cptr))) < 510)
656 SetFlag(cptr, FLAG_NONL);
658 DBufClear(&(cli_recvQ(cptr)));
660 else if ((IsServer(cptr) &&
661 server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) ||
663 connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED))
669 /* If there's still data to process, wait 2 seconds first */
670 if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
671 !t_onqueue(&(cli_proc(cptr))))
673 Debug((DEBUG_LIST, "Adding client process timer for %C", cptr));
674 cli_freeflag(cptr) |= FREEFLAG_TIMER;
675 timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr),
682 /** Start a connection to another server.
683 * @param aconf Connect block data for target server.
684 * @param by Client who requested the connection (if any).
685 * @return Non-zero on success; zero on failure.
687 int connect_server(struct ConfItem* aconf, struct Client* by)
689 struct Client* cptr = 0;
692 if (aconf->dns_pending) {
693 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s connect DNS pending",
697 Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name,
698 ircd_ntoa(&aconf->address.addr)));
700 if ((cptr = FindClient(aconf->name))) {
701 if (IsServer(cptr) || IsMe(cptr)) {
702 sendto_opmask_butone(0, SNO_OLDSNO, "Server %s already present from %s",
703 aconf->name, cli_name(cli_from(cptr)));
704 if (by && IsUser(by) && !MyUser(by)) {
705 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present "
706 "from %s", by, aconf->name, cli_name(cli_from(cptr)));
710 else if (IsHandshake(cptr) || IsConnecting(cptr)) {
711 if (by && IsUser(by)) {
712 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in "
713 "progress", by, cli_name(cptr));
719 * If we don't know the IP# for this host and it is a hostname and
720 * not a ip# string, then try and find the appropriate host record.
722 if (!irc_in_addr_valid(&aconf->address.addr)
723 && !ircd_aton(&aconf->address.addr, aconf->host)) {
724 char buf[HOSTLEN + 1];
726 host_from_uh(buf, aconf->host, HOSTLEN);
727 gethost_byname(buf, connect_dns_callback, aconf);
728 aconf->dns_pending = 1;
731 cptr = make_client(NULL, STAT_UNKNOWN_SERVER);
734 * Copy these in so we have something for error detection.
736 ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN);
737 ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN);
740 * Attach config entries to client here rather than in
741 * completed_connection. This to avoid null pointer references
743 attach_confs_byhost(cptr, aconf->host, CONF_SERVER);
745 if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) {
746 sendto_opmask_butone(0, SNO_OLDSNO, "Host %s is not enabled for "
747 "connecting: no Connect block", aconf->name);
748 if (by && IsUser(by) && !MyUser(by)) {
749 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no "
750 "Connect block", by, aconf->name);
752 det_confs_butmask(cptr, 0);
757 * attempt to connect to the server in the conf line
759 if (!connect_inet(aconf, cptr)) {
760 if (by && IsUser(by) && !MyUser(by)) {
761 sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by,
764 det_confs_butmask(cptr, 0);
769 * NOTE: if we're here we have a valid C:Line and the client should
770 * have started the connection and stored the remote address/port and
771 * ip address name in itself
773 * The socket has been connected or connect is in progress.
776 if (by && IsUser(by)) {
777 ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s",
779 assert(0 == cli_serv(cptr)->user);
780 cli_serv(cptr)->user = cli_user(by);
781 cli_user(by)->refcnt++;
784 *(cli_serv(cptr))->by = '\0';
785 /* strcpy(cptr->serv->by, "Auto"); */
787 cli_serv(cptr)->up = &me;
790 if (cli_fd(cptr) > HighestFd)
791 HighestFd = cli_fd(cptr);
793 LocalClientArray[cli_fd(cptr)] = cptr;
795 Count_newunknown(UserStats);
796 /* Actually we lie, the connect hasn't succeeded yet, but we have a valid
797 * cptr, so we register it now.
798 * Maybe these two calls should be merged.
800 add_client_to_list(cptr);
802 /* nextping = CurrentTime; */
804 return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ?
805 completed_connection(cptr) : 1;
808 /** Find the real hostname for the host running the server (or one which
809 * matches the server's name) and its primary IP#. Hostname is stored
810 * in the client structure passed as a pointer.
812 void init_server_identity(void)
814 const struct LocalConf* conf = conf_get_local();
817 ircd_strncpy(cli_name(&me), conf->name, HOSTLEN);
818 SetYXXServerName(&me, conf->numeric);
821 /** Process events on a client socket.
822 * @param ev Socket event structure that has a struct Connection as
823 * its associated data.
825 static void client_sock_callback(struct Event* ev)
828 struct Connection* con;
832 assert(0 != ev_socket(ev));
833 assert(0 != s_data(ev_socket(ev)));
835 con = (struct Connection*) s_data(ev_socket(ev));
837 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
839 cptr = con_client(con);
841 assert(0 == cptr || con == cli_connect(cptr));
843 switch (ev_type(ev)) {
845 con_freeflag(con) &= ~FREEFLAG_SOCKET;
847 if (!con_freeflag(con) && !cptr)
848 free_connection(con);
851 case ET_CONNECT: /* socket connection completed */
852 if (!completed_connection(cptr) || IsDead(cptr))
853 fallback = cli_info(cptr);
856 case ET_ERROR: /* an error occurred */
857 fallback = cli_info(cptr);
858 cli_error(cptr) = ev_data(ev);
859 if (s_state(&(con_socket(con))) == SS_CONNECTING) {
860 completed_connection(cptr);
861 /* for some reason, the os_get_sockerr() in completed_connect()
862 * can return 0 even when ev_data(ev) indicates a real error, so
863 * re-assign the client error here.
865 cli_error(cptr) = ev_data(ev);
869 case ET_EOF: /* end of file on socket */
870 Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr),
872 SetFlag(cptr, FLAG_DEADSOCKET);
873 if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) {
874 exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)",
875 cli_name(cptr), cli_serv(cptr)->last_error_msg);
878 fmt = "Read error: %s";
879 fallback = "EOF from client";
883 case ET_WRITE: /* socket is writable */
884 ClrFlag(cptr, FLAG_BLOCKED);
885 if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048)
886 list_next_channels(cptr);
887 Debug((DEBUG_SEND, "Sending queued data to %C", cptr));
891 case ET_READ: /* socket is readable */
893 Debug((DEBUG_DEBUG, "Reading data from %C", cptr));
894 if (read_packet(cptr, 1) == 0) /* error while reading packet */
895 fallback = "EOF from client";
900 assert(0 && "Unrecognized socket event in client_sock_callback()");
904 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
907 const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback;
909 msg = "Unknown error";
910 exit_client_msg(cptr, cptr, &me, fmt, msg);
914 /** Process a timer on client socket.
915 * @param ev Timer event that has a struct Connection as its
918 static void client_timer_callback(struct Event* ev)
921 struct Connection* con;
923 assert(0 != ev_timer(ev));
924 assert(0 != t_data(ev_timer(ev)));
925 assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev));
927 con = (struct Connection*) t_data(ev_timer(ev));
929 assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
931 cptr = con_client(con);
933 assert(0 == cptr || con == cli_connect(cptr));
935 if (ev_type(ev)== ET_DESTROY) {
936 con_freeflag(con) &= ~FREEFLAG_TIMER; /* timer has expired... */
938 if (!con_freeflag(con) && !cptr)
939 free_connection(con); /* client is being destroyed */
941 Debug((DEBUG_LIST, "Client process timer for %C expired; processing",
943 read_packet(cptr, 0); /* read_packet will re-add timer if needed */
946 assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));