2 * IRC - Internet Relay Chat, ircd/s_misc.c (formerly ircd/date.c)
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 * @brief Miscellaneous support functions.
35 #include "ircd_alloc.h"
36 #include "ircd_auth.h"
37 #include "ircd_features.h"
39 #include "ircd_reply.h"
40 #include "ircd_snprintf.h"
41 #include "ircd_string.h"
48 #include "querycmds.h"
69 /** Array of English month names (0 = January). */
70 static char *months[] = {
71 "January", "February", "March", "April",
72 "May", "June", "July", "August",
73 "September", "October", "November", "December"
76 /** Array of English day names (0 = Sunday). */
77 static char *weekdays[] = {
78 "Sunday", "Monday", "Tuesday", "Wednesday",
79 "Thursday", "Friday", "Saturday"
85 /** Global statistics structure. */
86 static struct ServerStatistics ircst;
87 /** Public pointer to global statistics structure. */
88 struct ServerStatistics* ServerStats = &ircst;
90 /** Formats a Unix time as a readable string.
91 * @param clock Unix time to format (0 means #CurrentTime).
92 * @return Pointer to a static buffer containing something like
93 * "Sunday January 1 2000 -- 09:30 +01:00"
95 char *date(time_t clock)
97 static char buf[80], plus;
105 memcpy(&gmbuf, gm, sizeof(gmbuf));
107 lt = localtime(&clock);
109 /* There is unfortunately no clean portable way to extract time zone
110 * offset information, so do ugly things.
112 minswest = (gm->tm_hour - lt->tm_hour) * 60 + (gm->tm_min - lt->tm_min);
113 if (lt->tm_yday != gm->tm_yday)
115 if ((lt->tm_yday > gm->tm_yday && lt->tm_year == gm->tm_year) ||
116 (lt->tm_yday < gm->tm_yday && lt->tm_year != gm->tm_year))
122 plus = (minswest > 0) ? '-' : '+';
124 minswest = -minswest;
126 sprintf(buf, "%s %s %d %d -- %02d:%02d %c%02d:%02d",
127 weekdays[lt->tm_wday], months[lt->tm_mon], lt->tm_mday,
128 1900 + lt->tm_year, lt->tm_hour, lt->tm_min,
129 plus, minswest / 60, minswest % 60);
134 /** Like ctime() but with no trailing newline. Also, it takes
135 * the time value as parameter, instead of pointer to it.
136 * @param value Unix time to format.
137 * @return Pointer to a static buffer containing formatted time.
139 char *myctime(time_t value)
141 /* Use a secondary buffer in case ctime() would not replace an
142 * overwritten newline.
147 strcpy(buf, ctime(&value));
148 if ((p = strchr(buf, '\n')) != NULL)
154 /** Return the name of the client for various tracking and admin
155 * purposes. The main purpose of this function is to return the
156 * "socket host" name of the client, if that differs from the
157 * advertised name (other than case). But, this can be used on any
159 * @param sptr Client to operate on.
160 * @param showip If non-zero, append [username\@text-ip] to name.
161 * @return Either cli_name(\a sptr) or a static buffer.
163 const char* get_client_name(const struct Client* sptr, int showip)
165 static char nbuf[HOSTLEN * 2 + USERLEN + 5];
167 if (MyConnect(sptr)) {
169 ircd_snprintf(0, nbuf, sizeof(nbuf), "%s[%s@%s]", cli_name(sptr),
170 IsIdented(sptr) ? cli_username(sptr) : "unknown",
173 return cli_name(sptr);
176 return cli_name(sptr);
179 /** Set cli_sockhost(cptr) from \a host.
180 * If \a host contains an '@', copy starting after that byte.
181 * Otherwise copy all of \a host.
182 * @param cptr Client to operate on.
183 * @param host hostname or user\@hostname string.
185 void get_sockhost(struct Client *cptr, char *host)
188 if ((s = strchr(host, '@')))
192 ircd_strncpy(cli_sockhost(cptr), s, HOSTLEN);
196 * Exit one client, local or remote. Assuming for local client that
197 * all dependants already have been removed, and socket is closed.
198 * @param bcptr Client being (s)quitted.
199 * @param comment The QUIT comment to send.
201 /* Rewritten by Run - 24 sept 94 */
202 static void exit_one_client(struct Client* bcptr, const char* comment)
206 if (cli_serv(bcptr) && cli_serv(bcptr)->client_list) /* Was SetServerYXX called ? */
207 ClearServerYXX(bcptr); /* Removes server from server_list[] */
210 * clear out uping requests
213 uping_cancel(bcptr, 0);
215 * Stop a running /LIST clean
217 if (MyUser(bcptr) && cli_listing(bcptr)) {
218 cli_listing(bcptr)->chptr->mode.mode &= ~MODE_LISTED;
219 MyFree(cli_listing(bcptr));
220 cli_listing(bcptr) = NULL;
223 * If a person is on a channel, send a QUIT notice
224 * to every client (person) on the same channel (so
225 * that the client can show the "**signoff" message).
226 * (Note: The notice is to the local clients *only*)
228 sendcmdto_common_channels_butone(bcptr, CMD_QUIT, NULL, ":%s", comment);
230 remove_user_from_all_channels(bcptr);
232 /* Clean up invitefield */
233 while ((lp = cli_user(bcptr)->invited))
234 del_invite(bcptr, lp->value.chptr);
236 /* Clean up silencefield */
237 while ((lp = cli_user(bcptr)->silence))
238 del_silence(bcptr, lp->value.cp);
240 /* Clean up snotice lists */
242 set_snomask(bcptr, ~0, SNO_DEL);
244 if (IsInvisible(bcptr))
245 --UserStats.inv_clients;
248 if (MyConnect(bcptr))
249 Count_clientdisconnects(bcptr, UserStats);
251 Count_remoteclientquits(UserStats, bcptr);
254 else if (IsServer(bcptr))
256 /* Remove downlink list node of uplink */
257 remove_dlink(&(cli_serv(cli_serv(bcptr)->up))->down, cli_serv(bcptr)->updown);
258 cli_serv(bcptr)->updown = 0;
260 if (MyConnect(bcptr))
261 Count_serverdisconnects(UserStats);
263 Count_remoteserverquits(UserStats);
265 else if (IsMe(bcptr))
267 sendto_opmask_butone(0, SNO_OLDSNO, "ERROR: tried to exit me! : %s",
269 return; /* ...must *never* exit self! */
271 else if (IsUnknown(bcptr) || IsConnecting(bcptr) || IsHandshake(bcptr))
272 Count_unknowndisconnects(UserStats);
277 if (IsIPChecked(bcptr))
278 IPcheck_disconnect(bcptr);
281 * Remove from serv->client_list
282 * NOTE: user is *always* NULL if this is a server
284 if (cli_user(bcptr)) {
285 assert(!IsServer(bcptr));
286 /* bcptr->user->server->serv->client_list[IndexYXX(bcptr)] = NULL; */
287 RemoveYXXClient(cli_user(bcptr)->server, cli_yxx(bcptr));
288 if (IsIAuthed(bcptr) || cli_iauth(bcptr))
289 iauth_exit_client(bcptr);
292 /* Remove bcptr from the client list */
294 if (hRemClient(bcptr) != 0)
295 Debug((DEBUG_ERROR, "%p !in tab %s[%s] %p %p %p %d %d %p",
296 bcptr, cli_name(bcptr), cli_from(bcptr) ? cli_sockhost(cli_from(bcptr)) : "??host",
297 cli_from(bcptr), cli_next(bcptr), cli_prev(bcptr), cli_fd(bcptr),
298 cli_status(bcptr), cli_user(bcptr)));
302 remove_client_from_list(bcptr);
305 /* exit_downlinks - added by Run 25-9-94 */
307 * Removes all clients and downlinks (+clients) of any server
308 * QUITs are generated and sent to local users.
309 * @param cptr server that must have all dependents removed
310 * @param sptr source who thought that this was a good idea
311 * @param comment comment sent as sign off message to local clients
313 static void exit_downlinks(struct Client *cptr, struct Client *sptr, char *comment)
315 struct Client *acptr;
318 struct Client **acptrp;
321 /* Run over all its downlinks */
322 for (lp = cli_serv(cptr)->down; lp; lp = next)
325 acptr = lp->value.cptr;
326 /* Remove the downlinks and client of the downlink */
327 exit_downlinks(acptr, sptr, comment);
328 /* Remove the downlink itself */
329 exit_one_client(acptr, cli_name(&me));
331 /* Remove all clients of this server */
332 acptrp = cli_serv(cptr)->client_list;
333 for (i = 0; i <= cli_serv(cptr)->nn_mask; ++acptrp, ++i) {
335 exit_one_client(*acptrp, comment);
339 /* exit_client, rewritten 25-9-94 by Run */
341 * Eexits a client of *any* type (user, server, etc)
342 * from this server. Also, this generates all necessary prototol
343 * messages that this exit may cause.
345 * This function implicitly exits all other clients depending on
348 * For convenience, this function returns a suitable value for
349 * m_funtion return value:
351 * CPTR_KILLED if (cptr == bcptr)
352 * 0 if (cptr != bcptr)
354 * This function can be called in two ways:
355 * 1) From before or in parse(), exitting the 'cptr', in which case it was
356 * invoked as exit_client(cptr, cptr, &me,...), causing it to always
357 * return CPTR_KILLED.
358 * 2) Via parse from a m_function call, in which case it was invoked as
359 * exit_client(cptr, acptr, sptr, ...). Here 'sptr' is known; the client
360 * that generated the message in a way that we can assume he already
361 * did remove acptr from memory himself (or in other cases we don't mind
362 * because he will be delinked.) Or invoked as:
363 * exit_client(cptr, acptr/sptr, &me, ...) when WE decide this one should
365 * In general: No generated SQUIT or QUIT should be sent to source link
366 * sptr->from. And CPTR_KILLED should be returned if cptr got removed (too).
369 * @param cptr Connection currently being handled by read_message.
370 * @param victim Client being killed.
371 * @param killer Client that made the decision to remove \a victim.
372 * @param comment Reason for the exit.
373 * @return CPTR_KILLED if cptr == bcptr, else 0.
375 int exit_client(struct Client *cptr,
376 struct Client* victim,
377 struct Client* killer,
380 struct Client* acptr = 0;
384 char comment1[HOSTLEN + HOSTLEN + 2];
386 if (MyConnect(victim))
388 SetFlag(victim, FLAG_CLOSING);
390 if (feature_bool(FEAT_CONNEXIT_NOTICES) && IsUser(victim))
391 sendto_opmask_butone(0, SNO_CONNEXIT,
392 "Client exiting: %s (%s@%s) [%s] [%s] <%s%s>",
393 cli_name(victim), cli_user(victim)->username,
394 cli_user(victim)->host, comment,
395 ircd_ntoa(&cli_ip(victim)),
396 NumNick(victim) /* two %s's */);
399 on_for = CurrentTime - cli_firsttime(victim);
402 log_write(LS_USER, L_TRACE, 0, "%Tu %i %s@%s %s %s %s%s %s :%s",
403 cli_firsttime(victim), on_for,
404 cli_user(victim)->username, cli_sockhost(victim),
405 ircd_ntoa(&cli_ip(victim)),
406 IsAccount(victim) ? cli_username(victim) : "0",
407 NumNick(victim), /* two %s's */
408 cli_name(victim), cli_info(victim));
410 if (victim != cli_from(killer) /* The source knows already */
411 && IsClient(victim)) /* Not a Ping struct or Log file */
413 if (IsServer(victim) || IsHandshake(victim))
414 sendcmdto_one(killer, CMD_SQUIT, victim, "%s 0 :%s", cli_name(&me), comment);
415 else if (!IsConnecting(victim)) {
416 if (!IsDead(victim)) {
417 if (IsServer(victim))
418 sendcmdto_one(killer, CMD_ERROR, victim,
419 ":Closing Link: %s by %s (%s)", cli_name(victim),
420 cli_name(killer), comment);
422 sendrawto_one(victim, MSG_ERROR " :Closing Link: %s by %s (%s)",
423 cli_name(victim), IsServer(killer) ? cli_name(&me) :
424 cli_name(killer), comment);
427 if ((IsServer(victim) || IsHandshake(victim) || IsConnecting(victim)) &&
428 (killer == &me || (IsServer(killer) &&
429 (strncmp(comment, "Leaf-only link", 14) ||
430 strncmp(comment, "Non-Hub link", 12)))))
433 * Note: check user == user needed to make sure we have the same
436 if (cli_serv(victim)->user && *(cli_serv(victim))->by &&
437 (acptr = findNUser(cli_serv(victim)->by))) {
438 if (cli_user(acptr) == cli_serv(victim)->user) {
439 sendcmdto_one(&me, CMD_NOTICE, acptr,
440 "%C :Link with %s cancelled: %s", acptr,
441 cli_name(victim), comment);
445 * not right client, set by to empty string
448 *(cli_serv(victim))->by = '\0';
452 sendto_opmask_butone(acptr, SNO_OLDSNO, "Link with %s cancelled: %s",
453 cli_name(victim), comment);
457 * Close the Client connection first.
459 close_connection(victim);
462 if (IsServer(victim))
464 if (feature_bool(FEAT_HIS_NETSPLIT))
465 strcpy(comment1, "*.net *.split");
468 strcpy(comment1, cli_name(cli_serv(victim)->up));
469 strcat(comment1, " ");
470 strcat(comment1, cli_name(victim));
474 sendto_opmask_butone(killer, SNO_OLDSNO, "%s SQUIT by %s [%s]:",
475 (cli_user(killer)->server == victim ||
476 cli_user(killer)->server == cli_serv(victim)->up) ?
478 get_client_name(killer, HIDE_IP),
479 cli_name(cli_user(killer)->server));
480 else if (killer != &me && cli_serv(victim)->up != killer)
481 sendto_opmask_butone(0, SNO_OLDSNO, "Received SQUIT %s from %s :",
482 cli_name(victim), IsServer(killer) ? cli_name(killer) :
483 get_client_name(killer, HIDE_IP));
484 sendto_opmask_butone(0, SNO_NETWORK, "Net break: %C %C (%s)",
485 cli_serv(victim)->up, victim, comment);
489 * First generate the needed protocol for the other server links
492 for (dlp = cli_serv(&me)->down; dlp; dlp = dlp->next) {
493 if (dlp->value.cptr != cli_from(killer) && dlp->value.cptr != victim)
495 if (IsServer(victim))
496 sendcmdto_one(killer, CMD_SQUIT, dlp->value.cptr, "%s %Tu :%s",
497 cli_name(victim), cli_serv(victim)->timestamp, comment);
498 else if (IsUser(victim) && !HasFlag(victim, FLAG_KILLED))
499 sendcmdto_one(victim, CMD_QUIT, dlp->value.cptr, ":%s", comment);
502 /* Then remove the client structures */
503 if (IsServer(victim))
504 exit_downlinks(victim, killer, comment1);
505 exit_one_client(victim, comment);
508 * cptr can only have been killed if it was cptr itself that got killed here,
509 * because cptr can never have been a dependant of victim --Run
511 return (cptr == victim) ? CPTR_KILLED : 0;
515 * Exit client with formatted va_list message.
516 * Thin wrapper around exit_client().
517 * @param cptr Connection being processed.
518 * @param bcptr Connection being closed.
519 * @param sptr Connection who asked to close the victim.
520 * @param pattern Format string for message.
521 * @param vl Stdargs argument list.
522 * @return Has a tail call to exit_client().
524 /* added 25-9-94 by Run */
525 int vexit_client_msg(struct Client *cptr, struct Client *bcptr, struct Client *sptr,
526 const char *pattern, va_list vl)
529 ircd_vsnprintf(0, msgbuf, sizeof(msgbuf), pattern, vl);
530 return exit_client(cptr, bcptr, sptr, msgbuf);
534 * Exit client with formatted message using a variable-length argument list.
535 * Thin wrapper around exit_client().
536 * @param cptr Connection being processed.
537 * @param bcptr Connection being closed.
538 * @param sptr Connection who asked to close the victim.
539 * @param pattern Format string for message.
540 * @return Has a tail call to exit_client().
542 int exit_client_msg(struct Client *cptr, struct Client *bcptr,
543 struct Client *sptr, const char *pattern, ...)
548 va_start(vl, pattern);
549 ircd_vsnprintf(0, msgbuf, sizeof(msgbuf), pattern, vl);
552 return exit_client(cptr, bcptr, sptr, msgbuf);
555 /** Initialize global server statistics. */
556 /* (Kind of pointless since C guarantees it's already zero'ed, but... */
559 memset(&ircst, 0, sizeof(ircst));
562 /** Report server statistics to a client.
563 * @param cptr Client who wants statistics.
564 * @param sd StatDesc structure being looked up (unused).
565 * @param param Extra parameter passed by user (unused).
567 void tstats(struct Client *cptr, const struct StatDesc *sd, char *param)
569 struct Client *acptr;
571 struct ServerStatistics *sp;
572 struct ServerStatistics tmp;
575 memcpy(sp, ServerStats, sizeof(struct ServerStatistics));
576 for (i = 0; i < MAXCONNECTIONS; i++)
578 if (!(acptr = LocalClientArray[i]))
582 sp->is_sbs += cli_sendB(acptr);
583 sp->is_sbr += cli_receiveB(acptr);
584 sp->is_sks += cli_sendK(acptr);
585 sp->is_skr += cli_receiveK(acptr);
586 sp->is_sti += CurrentTime - cli_firsttime(acptr);
588 if (sp->is_sbs > 1023)
590 sp->is_sks += (sp->is_sbs >> 10);
593 if (sp->is_sbr > 1023)
595 sp->is_skr += (sp->is_sbr >> 10);
599 else if (IsUser(acptr))
601 sp->is_cbs += cli_sendB(acptr);
602 sp->is_cbr += cli_receiveB(acptr);
603 sp->is_cks += cli_sendK(acptr);
604 sp->is_ckr += cli_receiveK(acptr);
605 sp->is_cti += CurrentTime - cli_firsttime(acptr);
607 if (sp->is_cbs > 1023)
609 sp->is_cks += (sp->is_cbs >> 10);
612 if (sp->is_cbr > 1023)
614 sp->is_ckr += (sp->is_cbr >> 10);
618 else if (IsUnknown(acptr))
622 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":accepts %u refused %u",
623 sp->is_ac, sp->is_ref);
624 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
625 ":unknown commands %u prefixes %u", sp->is_unco, sp->is_unpf);
626 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
627 ":nick collisions %u unknown closes %u", sp->is_kill, sp->is_ni);
628 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
629 ":wrong direction %u empty %u", sp->is_wrdi, sp->is_empt);
630 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
631 ":numerics seen %u mode fakes %u", sp->is_num, sp->is_fake);
632 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG,
633 ":auth successes %u fails %u", sp->is_asuc, sp->is_abad);
634 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":local connections %u",
636 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Client server");
637 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":connected %u %u",
638 sp->is_cl, sp->is_sv);
639 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":bytes sent %u.%uK %u.%uK",
640 sp->is_cks, sp->is_cbs, sp->is_sks, sp->is_sbs);
641 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":bytes recv %u.%uK %u.%uK",
642 sp->is_ckr, sp->is_cbr, sp->is_skr, sp->is_sbr);
643 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":time connected %Tu %Tu",
644 sp->is_cti, sp->is_sti);