/[svn]/ircd-hybrid/src/client.c
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Contents of /ircd-hybrid/src/client.c

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Revision 499 - (show annotations)
Wed Mar 1 19:32:01 2006 UTC (15 years, 3 months ago) by michael
File MIME type: text/x-chdr
File size: 49578 byte(s)
- exit_client(): Don't bounce a QUIT back to origin's server
  Reported by adx

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * client.c: Controls clients.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "client.h"
27 #include "channel_mode.h"
28 #include "common.h"
29 #include "hash.h"
30 #include "ircd.h"
31 #include "s_gline.h"
32 #include "numeric.h"
33 #include "packet.h"
34 #include "s_auth.h"
35 #include "s_conf.h"
36 #include "parse_aline.h"
37 #include "s_serv.h"
38 #include "send.h"
39 #include "whowas.h"
40 #include "s_user.h"
41 #include "hostmask.h"
42 #include "listener.h"
43 #include "userhost.h"
44 #include "s_stats.h"
45 #include "watch.h"
46
47 dlink_list listing_client_list = { NULL, NULL, 0 };
48 /* Pointer to beginning of Client list */
49 dlink_list global_client_list = {NULL, NULL, 0};
50 /* unknown/client pointer lists */
51 dlink_list unknown_list = {NULL, NULL, 0};
52 dlink_list local_client_list = {NULL, NULL, 0};
53 dlink_list serv_list = {NULL, NULL, 0};
54 dlink_list global_serv_list = {NULL, NULL, 0};
55 dlink_list oper_list = {NULL, NULL, 0};
56
57 static EVH check_pings;
58
59 static BlockHeap *client_heap = NULL;
60 static BlockHeap *lclient_heap = NULL;
61
62 static dlink_list dead_list = { NULL, NULL, 0};
63 static dlink_list abort_list = { NULL, NULL, 0};
64
65 static dlink_node *eac_next; /* next aborted client to exit */
66
67 static void check_pings_list(dlink_list *);
68 static void check_unknowns_list(void);
69 static void close_connection(struct Client *);
70 static void ban_them(struct Client *client_p, struct ConfItem *conf);
71 static void del_all_accepts(struct Client *);
72
73 /* init_client()
74 *
75 * inputs - NONE
76 * output - NONE
77 * side effects - initialize client free memory
78 */
79 void
80 init_client(void)
81 {
82 /* start off the check ping event .. -- adrian
83 * Every 30 seconds is plenty -- db
84 */
85 client_heap = BlockHeapCreate("client", sizeof(struct Client), CLIENT_HEAP_SIZE);
86 lclient_heap = BlockHeapCreate("local client", sizeof(struct LocalUser), LCLIENT_HEAP_SIZE);
87 eventAdd("check_pings", check_pings, NULL, 5);
88 }
89
90 /*
91 * make_client - create a new Client struct and set it to initial state.
92 *
93 * from == NULL, create local client (a client connected
94 * to a socket).
95 * WARNING: This leaves the client in a dangerous
96 * state where fd == -1, dead flag is not set and
97 * the client is on the unknown_list; therefore,
98 * the first thing to do after calling make_client(NULL)
99 * is setting fd to something reasonable. -adx
100 *
101 * from, create remote client (behind a socket
102 * associated with the client defined by
103 * 'from'). ('from' is a local client!!).
104 */
105 struct Client *
106 make_client(struct Client *from)
107 {
108 struct Client *client_p = BlockHeapAlloc(client_heap);
109
110 if (from == NULL)
111 {
112 client_p->from = client_p; /* 'from' of local client is self! */
113 client_p->since = client_p->lasttime = client_p->firsttime = CurrentTime;
114
115 client_p->localClient = BlockHeapAlloc(lclient_heap);
116 /* as good a place as any... */
117 dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list);
118 }
119 else
120 client_p->from = from;
121
122 client_p->hnext = client_p;
123 client_p->status = STAT_UNKNOWN;
124 strcpy(client_p->username, "unknown");
125
126 return client_p;
127 }
128
129 /*
130 * free_client
131 *
132 * inputs - pointer to client
133 * output - NONE
134 * side effects - client pointed to has its memory freed
135 */
136 static void
137 free_client(struct Client *client_p)
138 {
139 assert(client_p != NULL);
140 assert(client_p != &me);
141 assert(client_p->hnext == client_p);
142 assert(client_p->channel.head == NULL);
143 assert(dlink_list_length(&client_p->channel) == 0);
144
145 MyFree(client_p->away);
146 MyFree(client_p->serv);
147
148 if (MyConnect(client_p))
149 {
150 assert(dlink_list_length(&client_p->localClient->invited) == 0);
151 assert(client_p->localClient->invited.head == NULL);
152 assert(IsClosing(client_p) && IsDead(client_p));
153
154 MyFree(client_p->localClient->response);
155 MyFree(client_p->localClient->auth_oper);
156
157 /*
158 * clean up extra sockets from P-lines which have been discarded.
159 */
160 if (client_p->localClient->listener)
161 {
162 assert(0 < client_p->localClient->listener->ref_count);
163 if (0 == --client_p->localClient->listener->ref_count &&
164 !client_p->localClient->listener->active)
165 free_listener(client_p->localClient->listener);
166 }
167
168 dbuf_clear(&client_p->localClient->buf_recvq);
169 dbuf_clear(&client_p->localClient->buf_sendq);
170
171 BlockHeapFree(lclient_heap, client_p->localClient);
172 }
173
174 BlockHeapFree(client_heap, client_p);
175 }
176
177 /*
178 * check_pings - go through the local client list and check activity
179 * kill off stuff that should die
180 *
181 * inputs - NOT USED (from event)
182 * output - next time_t when check_pings() should be called again
183 * side effects -
184 *
185 *
186 * A PING can be sent to clients as necessary.
187 *
188 * Client/Server ping outs are handled.
189 */
190
191 /*
192 * Addon from adrian. We used to call this after nextping seconds,
193 * however I've changed it to run once a second. This is only for
194 * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
195 * run once a second makes life a lot easier - when a new client connects
196 * and they need a ping in 4 seconds, if nextping was set to 20 seconds
197 * we end up waiting 20 seconds. This is stupid. :-)
198 * I will optimise (hah!) check_pings() once I've finished working on
199 * tidying up other network IO evilnesses.
200 * -- adrian
201 */
202
203 static void
204 check_pings(void *notused)
205 {
206 check_pings_list(&local_client_list);
207 check_pings_list(&serv_list);
208 check_unknowns_list();
209 }
210
211 /* check_pings_list()
212 *
213 * inputs - pointer to list to check
214 * output - NONE
215 * side effects -
216 */
217 static void
218 check_pings_list(dlink_list *list)
219 {
220 char scratch[32]; /* way too generous but... */
221 struct Client *client_p; /* current local client_p being examined */
222 int ping, pingwarn; /* ping time value from client */
223 dlink_node *ptr, *next_ptr;
224
225 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
226 {
227 client_p = ptr->data;
228
229 /*
230 ** Note: No need to notify opers here. It's
231 ** already done when "FLAGS_DEADSOCKET" is set.
232 */
233 if (IsDead(client_p))
234 {
235 /* Ignore it, its been exited already */
236 continue;
237 }
238
239 if (client_p->localClient->reject_delay > 0)
240 {
241 if (client_p->localClient->reject_delay <= CurrentTime)
242 exit_client(client_p, &me, "Rejected");
243 continue;
244 }
245
246 if (GlobalSetOptions.idletime && IsClient(client_p))
247 {
248 if (!IsExemptKline(client_p) && !IsOper(client_p) &&
249 !IsIdlelined(client_p) &&
250 ((CurrentTime - client_p->localClient->last) > GlobalSetOptions.idletime))
251 {
252 struct ConfItem *conf;
253 struct AccessItem *aconf;
254
255 conf = make_conf_item(KLINE_TYPE);
256 aconf = &conf->conf.AccessItem;
257
258 DupString(aconf->host, client_p->host);
259 DupString(aconf->reason, "idle exceeder");
260 DupString(aconf->user, client_p->username);
261 aconf->hold = CurrentTime + 60;
262 add_temp_line(conf);
263
264 sendto_realops_flags(UMODE_ALL, L_ALL,
265 "Idle time limit exceeded for %s - temp k-lining",
266 get_client_name(client_p, HIDE_IP));
267 exit_client(client_p, &me, aconf->reason);
268 continue;
269 }
270 }
271
272 if (!IsRegistered(client_p))
273 ping = CONNECTTIMEOUT, pingwarn = 0;
274 else
275 ping = get_client_ping(client_p, &pingwarn);
276
277 if (ping < CurrentTime - client_p->lasttime)
278 {
279 if (!IsPingSent(client_p))
280 {
281 /*
282 * if we havent PINGed the connection and we havent
283 * heard from it in a while, PING it to make sure
284 * it is still alive.
285 */
286 SetPingSent(client_p);
287 ClearPingWarning(client_p);
288 client_p->lasttime = CurrentTime - ping;
289 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
290 }
291 else
292 {
293 if (CurrentTime - client_p->lasttime >= 2 * ping)
294 {
295 /*
296 * If the client/server hasn't talked to us in 2*ping seconds
297 * and it has a ping time, then close its connection.
298 */
299 if (IsServer(client_p) || IsHandshake(client_p))
300 {
301 sendto_realops_flags(UMODE_ALL, L_ADMIN,
302 "No response from %s, closing link",
303 get_client_name(client_p, HIDE_IP));
304 sendto_realops_flags(UMODE_ALL, L_OPER,
305 "No response from %s, closing link",
306 get_client_name(client_p, MASK_IP));
307 ilog(L_NOTICE, "No response from %s, closing link",
308 get_client_name(client_p, HIDE_IP));
309 }
310 ircsprintf(scratch, "Ping timeout: %d seconds",
311 (int)(CurrentTime - client_p->lasttime));
312
313 exit_client(client_p, &me, scratch);
314 }
315 else if (!IsPingWarning(client_p) && pingwarn > 0 &&
316 (IsServer(client_p) || IsHandshake(client_p)) &&
317 CurrentTime - client_p->lasttime >= ping + pingwarn)
318 {
319 /*
320 * If the server hasn't replied in pingwarn seconds after sending
321 * the PING, notify the opers so that they are aware of the problem.
322 */
323 SetPingWarning(client_p);
324 sendto_realops_flags(UMODE_ALL, L_ADMIN,
325 "Warning, no response from %s in %d seconds",
326 get_client_name(client_p, HIDE_IP), pingwarn);
327 sendto_realops_flags(UMODE_ALL, L_OPER,
328 "Warning, no response from %s in %d seconds",
329 get_client_name(client_p, MASK_IP), pingwarn);
330 ilog(L_NOTICE, "No response from %s in %d seconds",
331 get_client_name(client_p, HIDE_IP), pingwarn);
332 }
333 }
334 }
335 }
336 }
337
338 /* check_unknowns_list()
339 *
340 * inputs - pointer to list of unknown clients
341 * output - NONE
342 * side effects - unknown clients get marked for termination after n seconds
343 */
344 static void
345 check_unknowns_list(void)
346 {
347 dlink_node *ptr, *next_ptr;
348
349 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
350 {
351 struct Client *client_p = ptr->data;
352
353 if (client_p->localClient->reject_delay > 0)
354 {
355 if (client_p->localClient->reject_delay <= CurrentTime)
356 exit_client(client_p, &me, "Rejected");
357 continue;
358 }
359
360 /* Check UNKNOWN connections - if they have been in this state
361 * for > 30s, close them.
362 */
363 if (client_p->firsttime ? ((CurrentTime - client_p->firsttime) > 30) : 0)
364 exit_client(client_p, &me, "Connection timed out");
365 }
366 }
367
368 /* check_conf_klines()
369 *
370 * inputs - NONE
371 * output - NONE
372 * side effects - Check all connections for a pending kline against the
373 * client, exit the client if a kline matches.
374 */
375 void
376 check_conf_klines(void)
377 {
378 struct Client *client_p = NULL; /* current local client_p being examined */
379 struct AccessItem *aconf = NULL;
380 struct ConfItem *conf = NULL;
381 dlink_node *ptr, *next_ptr;
382
383 DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
384 {
385 client_p = ptr->data;
386
387 /* If a client is already being exited
388 */
389 if (IsDead(client_p) || !IsClient(client_p))
390 continue;
391
392 /* if there is a returned struct ConfItem then kill it */
393 if ((aconf = find_dline_conf(&client_p->localClient->ip,
394 client_p->localClient->aftype)) != NULL)
395 {
396 if (aconf->status & CONF_EXEMPTDLINE)
397 continue;
398
399 conf = aconf->conf_ptr;
400 ban_them(client_p, conf);
401 continue; /* and go examine next fd/client_p */
402 }
403
404 if (ConfigFileEntry.glines && (aconf = find_gline(client_p)) != NULL)
405 {
406 if (IsExemptKline(client_p) || IsExemptGline(client_p))
407 {
408 sendto_realops_flags(UMODE_ALL, L_ALL,
409 "GLINE over-ruled for %s, client is %cline_exempt",
410 get_client_name(client_p, HIDE_IP),
411 IsExemptKline(client_p) ? 'k' : 'g');
412 continue;
413 }
414
415 conf = aconf->conf_ptr;
416 ban_them(client_p, conf);
417 /* and go examine next fd/client_p */
418 continue;
419 }
420
421 if ((aconf = find_kill(client_p)) != NULL)
422 {
423
424 /* if there is a returned struct AccessItem.. then kill it */
425 if (IsExemptKline(client_p))
426 {
427 sendto_realops_flags(UMODE_ALL, L_ALL,
428 "KLINE over-ruled for %s, client is kline_exempt",
429 get_client_name(client_p, HIDE_IP));
430 continue;
431 }
432
433 conf = aconf->conf_ptr;
434 ban_them(client_p, conf);
435 continue;
436 }
437
438 /* if there is a returned struct MatchItem then kill it */
439 if ((conf = find_matching_name_conf(XLINE_TYPE, client_p->info,
440 NULL, NULL, 0)) != NULL ||
441 (conf = find_matching_name_conf(RXLINE_TYPE, client_p->info,
442 NULL, NULL, 0)) != NULL)
443 {
444 ban_them(client_p, conf);
445 continue;
446 }
447 }
448
449 /* also check the unknowns list for new dlines */
450 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
451 {
452 client_p = ptr->data;
453
454 if ((aconf = find_dline_conf(&client_p->localClient->ip,
455 client_p->localClient->aftype)))
456 {
457 if (aconf->status & CONF_EXEMPTDLINE)
458 continue;
459
460 exit_client(client_p, &me, "D-lined");
461 }
462 }
463 }
464
465 /*
466 * ban_them
467 *
468 * inputs - pointer to client to ban
469 * - pointer to ConfItem
470 * output - NONE
471 * side effects - given client_p is banned
472 */
473 static void
474 ban_them(struct Client *client_p, struct ConfItem *conf)
475 {
476 const char *user_reason = NULL; /* What is sent to user */
477 const char *channel_reason = NULL; /* What is sent to channel */
478 struct AccessItem *aconf = NULL;
479 struct MatchItem *xconf = NULL;
480 const char *type_string = NULL;
481 const char dline_string[] = "D-line";
482 const char kline_string[] = "K-line";
483 const char gline_string[] = "G-line";
484 const char xline_string[] = "X-line";
485
486 switch (conf->type)
487 {
488 case RKLINE_TYPE:
489 case KLINE_TYPE:
490 type_string = kline_string;
491 aconf = &conf->conf.AccessItem;
492 break;
493 case DLINE_TYPE:
494 type_string = dline_string;
495 aconf = &conf->conf.AccessItem;
496 break;
497 case GLINE_TYPE:
498 type_string = gline_string;
499 aconf = &conf->conf.AccessItem;
500 break;
501 case RXLINE_TYPE:
502 case XLINE_TYPE:
503 type_string = xline_string;
504 xconf = &conf->conf.MatchItem;
505 ++xconf->count;
506 break;
507 default:
508 assert(0);
509 break;
510 }
511
512 if (ConfigFileEntry.kline_with_reason)
513 {
514 if (aconf != NULL)
515 user_reason = aconf->reason ? aconf->reason : type_string;
516 if (xconf != NULL)
517 user_reason = xconf->reason ? xconf->reason : type_string;
518 }
519 else
520 user_reason = type_string;
521
522 if (ConfigFileEntry.kline_reason != NULL)
523 channel_reason = ConfigFileEntry.kline_reason;
524 else
525 channel_reason = user_reason;
526
527 sendto_realops_flags(UMODE_ALL, L_ALL, "%s active for %s",
528 type_string, get_client_name(client_p, HIDE_IP));
529
530 if (IsClient(client_p))
531 sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
532 me.name, client_p->name, user_reason);
533
534 exit_client(client_p, &me, channel_reason);
535 }
536
537 /* update_client_exit_stats()
538 *
539 * input - pointer to client
540 * output - NONE
541 * side effects -
542 */
543 static void
544 update_client_exit_stats(struct Client *client_p)
545 {
546 if (IsServer(client_p))
547 {
548 sendto_realops_flags(UMODE_EXTERNAL, L_ALL,
549 "Server %s split from %s",
550 client_p->name, client_p->servptr->name);
551 }
552 else if (IsClient(client_p))
553 {
554 --Count.total;
555 if (IsOper(client_p))
556 --Count.oper;
557 if (IsInvisible(client_p))
558 --Count.invisi;
559 }
560
561 if (splitchecking && !splitmode)
562 check_splitmode(NULL);
563 }
564
565 /* find_person()
566 *
567 * inputs - pointer to name
568 * output - return client pointer
569 * side effects - find person by (nick)name
570 */
571 /* XXX - ugly wrapper */
572 struct Client *
573 find_person(const struct Client *client_p, const char *name)
574 {
575 struct Client *c2ptr;
576
577 if (IsDigit(*name))
578 {
579 if ((c2ptr = hash_find_id(name)) != NULL)
580 {
581 /* invisible users shall not be found by UID guessing */
582 if (IsInvisible(c2ptr) && !IsServer(client_p))
583 c2ptr = NULL;
584 }
585 }
586 else
587 c2ptr = find_client(name);
588
589 return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL);
590 }
591
592 /*
593 * find_chasing - find the client structure for a nick name (user)
594 * using history mechanism if necessary. If the client is not found,
595 * an error message (NO SUCH NICK) is generated. If the client was found
596 * through the history, chasing will be 1 and otherwise 0.
597 */
598 struct Client *
599 find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing)
600 {
601 struct Client *who = find_person(client_p, user);
602
603 if (chasing)
604 *chasing = 0;
605
606 if (who)
607 return who;
608
609 if (IsDigit(*user))
610 return NULL;
611
612 if ((who = get_history(user,
613 (time_t)ConfigFileEntry.kill_chase_time_limit))
614 == NULL)
615 {
616 sendto_one(source_p, form_str(ERR_NOSUCHNICK),
617 me.name, source_p->name, user);
618 return NULL;
619 }
620
621 if (chasing)
622 *chasing = 1;
623
624 return who;
625 }
626
627 /*
628 * get_client_name - Return the name of the client
629 * for various tracking and
630 * admin purposes. The main purpose of this function is to
631 * return the "socket host" name of the client, if that
632 * differs from the advertised name (other than case).
633 * But, this can be used to any client structure.
634 *
635 * NOTE 1:
636 * Watch out the allocation of "nbuf", if either source_p->name
637 * or source_p->sockhost gets changed into pointers instead of
638 * directly allocated within the structure...
639 *
640 * NOTE 2:
641 * Function return either a pointer to the structure (source_p) or
642 * to internal buffer (nbuf). *NEVER* use the returned pointer
643 * to modify what it points!!!
644 */
645 const char *
646 get_client_name(struct Client *client, int showip)
647 {
648 static char nbuf[HOSTLEN * 2 + USERLEN + 5];
649
650 assert(client != NULL);
651
652 if (irccmp(client->name, client->host) == 0)
653 return client->name;
654
655 if (ConfigServerHide.hide_server_ips)
656 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
657 showip = MASK_IP;
658
659 if (ConfigFileEntry.hide_spoof_ips)
660 if (showip == SHOW_IP && IsIPSpoof(client))
661 showip = MASK_IP;
662
663 /* And finally, let's get the host information, ip or name */
664 switch (showip)
665 {
666 case SHOW_IP:
667 if (MyConnect(client))
668 {
669 ircsprintf(nbuf, "%s[%s@%s]", client->name, client->username,
670 client->sockhost);
671 break;
672 }
673 case MASK_IP:
674 ircsprintf(nbuf, "%s[%s@255.255.255.255]", client->name,
675 client->username);
676 break;
677 default:
678 ircsprintf(nbuf, "%s[%s@%s]", client->name, client->username,
679 client->host);
680 }
681
682 return nbuf;
683 }
684
685 void
686 free_exited_clients(void)
687 {
688 dlink_node *ptr, *next;
689 struct Client *target_p;
690
691 DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
692 {
693 target_p = ptr->data;
694
695 if (ptr->data == NULL)
696 {
697 sendto_realops_flags(UMODE_ALL, L_ALL,
698 "Warning: null client on dead_list!");
699 dlinkDelete(ptr, &dead_list);
700 free_dlink_node(ptr);
701 continue;
702 }
703
704 free_client(target_p);
705 dlinkDelete(ptr, &dead_list);
706 free_dlink_node(ptr);
707 }
708 }
709
710 /*
711 * Exit one client, local or remote. Assuming all dependents have
712 * been already removed, and socket closed for local client.
713 *
714 * The only messages generated are QUITs on channels.
715 */
716 static void
717 exit_one_client(struct Client *source_p, const char *quitmsg)
718 {
719 dlink_node *lp = NULL, *next_lp = NULL;
720
721 assert(!IsMe(source_p));
722
723 if (IsServer(source_p))
724 {
725 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->servers);
726
727 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
728 free_dlink_node(lp);
729
730 if (!MyConnect(source_p))
731 {
732 source_p->from->serv->dep_servers--;
733 assert(source_p->from->serv->dep_servers > 0);
734 }
735 }
736 else if (IsClient(source_p))
737 {
738 if (source_p->servptr->serv != NULL)
739 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->users);
740
741 /*
742 * If a person is on a channel, send a QUIT notice
743 * to every client (person) on the same channel (so
744 * that the client can show the "**signoff" message).
745 * (Note: The notice is to the local clients *only*)
746 */
747 sendto_common_channels_local(source_p, 0, ":%s!%s@%s QUIT :%s",
748 source_p->name, source_p->username,
749 source_p->host, quitmsg);
750 DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
751 remove_user_from_channel(lp->data);
752
753 add_history(source_p, 0);
754 off_history(source_p);
755
756 assert(source_p->whowas.head == NULL);
757 assert(source_p->whowas.tail == NULL);
758
759 /* Do local vs. remote processing here */
760 if (MyConnect(source_p))
761 {
762 /* Clean up invitefield */
763 DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
764 del_invite(lp->data, source_p);
765
766 /* Clean up allow lists */
767 del_all_accepts(source_p);
768 }
769 else
770 {
771 source_p->from->serv->dep_users--;
772 assert(source_p->from->serv->dep_users >= 0);
773 }
774 }
775
776 /* Remove source_p from the client lists */
777 if (HasID(source_p))
778 hash_del_id(source_p);
779 if (source_p->name[0])
780 hash_del_client(source_p);
781
782 hash_check_watch(source_p, RPL_LOGOFF);
783
784 if (IsUserHostIp(source_p))
785 delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
786
787 /* remove from global client list
788 * NOTE: source_p->node.next cannot be NULL if the client is added
789 * to global_client_list (there is always &me at its end)
790 */
791 if (source_p != NULL && source_p->node.next != NULL)
792 dlinkDelete(&source_p->node, &global_client_list);
793
794 update_client_exit_stats(source_p);
795
796 /* Check to see if the client isn't already on the dead list */
797 assert(dlinkFind(&dead_list, source_p) == NULL);
798
799 /* add to dead client dlist */
800 SetDead(source_p);
801 dlinkAdd(source_p, make_dlink_node(), &dead_list);
802 }
803
804 /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
805 * and servers to those servers that need them. A server needs the client
806 * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
807 * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
808 * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
809 * on that one -orabidoo
810 *
811 * This is now called on each local server -adx
812 */
813 static void
814 recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
815 struct Client *from, struct Client *to, const char *comment,
816 const char *splitstr, const char *myname)
817 {
818 dlink_node *ptr, *next;
819 struct Client *target_p;
820 int hidden = match(myname, source_p->name);
821
822 assert(to != source_p); /* should be already removed from serv_list */
823
824 /* If this server can handle quit storm (QS) removal
825 * of dependents, just send the SQUIT
826 *
827 * Always check *all* dependent servers if some of them are
828 * hidden behind fakename. If so, send out the QUITs -adx
829 */
830 if (hidden || !IsCapable(to, CAP_QS))
831 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->users.head)
832 {
833 target_p = ptr->data;
834 sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
835 }
836
837 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->servers.head)
838 recurse_send_quits(original_source_p, ptr->data, from, to,
839 comment, splitstr, myname);
840
841 if (!hidden && ((source_p == original_source_p && to != from) ||
842 !IsCapable(to, CAP_QS)))
843 {
844 /* don't use a prefix here - we have to be 100% sure the message
845 * will be accepted without Unknown prefix etc.. */
846 sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
847 }
848 }
849
850 /*
851 * Remove all clients that depend on source_p; assumes all (S)QUITs have
852 * already been sent. we make sure to exit a server's dependent clients
853 * and servers before the server itself; exit_one_client takes care of
854 * actually removing things off llists. tweaked from +CSr31 -orabidoo
855 */
856 static void
857 recurse_remove_clients(struct Client *source_p, const char *quitmsg)
858 {
859 dlink_node *ptr, *next;
860
861 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->users.head)
862 exit_one_client(ptr->data, quitmsg);
863
864 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->servers.head)
865 {
866 recurse_remove_clients(ptr->data, quitmsg);
867 exit_one_client(ptr->data, quitmsg);
868 }
869
870 assert(source_p->serv->dep_servers == 1);
871 assert(source_p->serv->dep_users == 0);
872 }
873
874 /*
875 ** Remove *everything* that depends on source_p, from all lists, and sending
876 ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
877 ** and its SQUITs have been sent except for the upstream one -orabidoo
878 */
879 static void
880 remove_dependents(struct Client *source_p, struct Client *from,
881 const char *comment, const char *splitstr)
882 {
883 struct Client *to;
884 struct ConfItem *conf;
885 struct AccessItem *aconf;
886 static char myname[HOSTLEN+1];
887 dlink_node *ptr;
888
889 DLINK_FOREACH(ptr, serv_list.head)
890 {
891 to = ptr->data;
892
893 if ((conf = to->serv->sconf) != NULL)
894 {
895 aconf = &conf->conf.AccessItem;
896 strlcpy(myname, my_name_for_link(aconf), sizeof(myname));
897 }
898 else
899 strlcpy(myname, me.name, sizeof(myname));
900 recurse_send_quits(source_p, source_p, from, to,
901 comment, splitstr, myname);
902 }
903
904 recurse_remove_clients(source_p, splitstr);
905 }
906
907 /*
908 * exit_client - exit a client of any type. Generally, you can use
909 * this on any struct Client, regardless of its state.
910 *
911 * Note, you shouldn't exit remote _users_ without first doing
912 * SetKilled and propagating a kill or similar message. However,
913 * it is perfectly correct to call exit_client to force a _server_
914 * quit (either local or remote one).
915 *
916 * inputs: - a client pointer that is going to be exited
917 * - for servers, the second argument is a pointer to who
918 * is firing the server. This side won't get any generated
919 * messages. NEVER NULL!
920 * output: none
921 * side effects: the client is delinked from all lists, disconnected,
922 * and the rest of IRC network is notified of the exit.
923 * Client memory is scheduled to be freed
924 */
925 void
926 exit_client(struct Client *source_p, struct Client *from, const char *comment)
927 {
928 dlink_node *m;
929
930 if (MyConnect(source_p))
931 {
932 /* DO NOT REMOVE. exit_client can be called twice after a failed
933 * read/write.
934 */
935 if (IsClosing(source_p))
936 return;
937
938 SetClosing(source_p);
939
940 if (IsIpHash(source_p))
941 remove_one_ip(&source_p->localClient->ip);
942
943 delete_auth(source_p);
944
945 if (IsClient(source_p))
946 {
947 --Count.local;
948
949 if (IsOper(source_p))
950 {
951 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
952 free_dlink_node(m);
953 }
954
955 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
956 if (source_p->localClient->list_task != NULL)
957 free_list_task(source_p->localClient->list_task, source_p);
958
959 hash_del_watch_list(source_p);
960 sendto_realops_flags(UMODE_CCONN, L_ALL, "Client exiting: %s (%s@%s) [%s] [%s]",
961 source_p->name, source_p->username, source_p->host, comment,
962 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
963 "255.255.255.255" : source_p->sockhost);
964 }
965 else if (!IsRegistered(source_p))
966 {
967 /*
968 * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
969 * STAT_HANDSHAKE or STAT_UNKNOWN
970 * all of which are lumped together into unknown_list
971 *
972 * In all above cases IsRegistered() will not be true.
973 */
974 dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
975 }
976
977 /* As soon as a client is known to be a server of some sort
978 * it has to be put on the serv_list, or SJOIN's to this new server
979 * from the connect burst will not be seen.
980 */
981 if (IsServer(source_p) || IsConnecting(source_p) || IsHandshake(source_p))
982 {
983 if ((m = dlinkFindDelete(&serv_list, source_p)) != NULL)
984 {
985 free_dlink_node(m);
986 unset_chcap_usage_counts(source_p);
987 }
988
989 if (IsServer(source_p))
990 --Count.myserver;
991 }
992
993 log_user_exit(source_p);
994
995 if (!IsDead(source_p))
996 {
997 if (IsServer(source_p))
998 {
999 /* for them, we are exiting the network */
1000 sendto_one(source_p, ":%s SQUIT %s :%s",
1001 ID_or_name(from, source_p), me.name, comment);
1002 }
1003
1004 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
1005 source_p->host, comment);
1006 }
1007
1008 /*
1009 ** Currently only server connections can have
1010 ** depending remote clients here, but it does no
1011 ** harm to check for all local clients. In
1012 ** future some other clients than servers might
1013 ** have remotes too...
1014 **
1015 ** Close the Client connection first and mark it
1016 ** so that no messages are attempted to send to it.
1017 ** Remember it makes source_p->from == NULL.
1018 */
1019 close_connection(source_p);
1020 }
1021
1022 if (IsServer(source_p))
1023 {
1024 char splitstr[HOSTLEN + HOSTLEN + 2];
1025
1026 /* This shouldn't ever happen */
1027 assert(source_p->serv != NULL && source_p->servptr != NULL);
1028
1029 if (ConfigServerHide.hide_servers)
1030 /*
1031 * set netsplit message to "*.net *.split" to still show
1032 * that its a split, but hide the servers splitting
1033 */
1034 strcpy(splitstr, "*.net *.split");
1035 else
1036 snprintf(splitstr, sizeof(splitstr), "%s %s",
1037 source_p->servptr->name, source_p->name);
1038
1039 remove_dependents(source_p, from->from, comment, splitstr);
1040
1041 if (source_p->servptr == &me)
1042 {
1043 sendto_realops_flags(UMODE_ALL, L_ALL,
1044 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1045 source_p->name, (int)(CurrentTime - source_p->firsttime),
1046 source_p->localClient->send.bytes >> 10,
1047 source_p->localClient->recv.bytes >> 10);
1048 ilog(L_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1049 source_p->name, (int)(CurrentTime - source_p->firsttime),
1050 source_p->localClient->send.bytes >> 10,
1051 source_p->localClient->recv.bytes >> 10);
1052 }
1053 }
1054 else if (IsClient(source_p) && !IsKilled(source_p))
1055 {
1056 sendto_server(from->from, source_p, NULL, CAP_TS6, NOCAPS,
1057 ":%s QUIT :%s", ID(source_p), comment);
1058 sendto_server(from->from, source_p, NULL, NOCAPS, CAP_TS6,
1059 ":%s QUIT :%s", source_p->name, comment);
1060 }
1061
1062 /* The client *better* be off all of the lists */
1063 assert(dlinkFind(&unknown_list, source_p) == NULL);
1064 assert(dlinkFind(&local_client_list, source_p) == NULL);
1065 assert(dlinkFind(&serv_list, source_p) == NULL);
1066 assert(dlinkFind(&oper_list, source_p) == NULL);
1067
1068 exit_one_client(source_p, comment);
1069 }
1070
1071 /*
1072 * close_connection
1073 * Close the physical connection. This function must make
1074 * MyConnect(client_p) == FALSE, and set client_p->from == NULL.
1075 */
1076 static void
1077 close_connection(struct Client *client_p)
1078 {
1079 struct ConfItem *conf;
1080 struct AccessItem *aconf;
1081 struct ClassItem *aclass;
1082
1083 assert(NULL != client_p);
1084
1085 if (IsServer(client_p))
1086 {
1087 ServerStats->is_sv++;
1088 ServerStats->is_sbs += client_p->localClient->send.bytes;
1089 ServerStats->is_sbr += client_p->localClient->recv.bytes;
1090 ServerStats->is_sti += CurrentTime - client_p->firsttime;
1091
1092 /* XXX Does this even make any sense at all anymore?
1093 * scheduling a 'quick' reconnect could cause a pile of
1094 * nick collides under TSora protocol... -db
1095 */
1096 /*
1097 * If the connection has been up for a long amount of time, schedule
1098 * a 'quick' reconnect, else reset the next-connect cycle.
1099 */
1100 if ((conf = find_exact_name_conf(SERVER_TYPE,
1101 client_p->name, client_p->username,
1102 client_p->host)))
1103 {
1104 /*
1105 * Reschedule a faster reconnect, if this was a automatically
1106 * connected configuration entry. (Note that if we have had
1107 * a rehash in between, the status has been changed to
1108 * CONF_ILLEGAL). But only do this if it was a "good" link.
1109 */
1110 aconf = &conf->conf.AccessItem;
1111 aclass = &((struct ConfItem *)aconf->class_ptr)->conf.ClassItem;
1112 aconf->hold = time(NULL);
1113 aconf->hold += (aconf->hold - client_p->since > HANGONGOODLINK) ?
1114 HANGONRETRYDELAY : ConFreq(aclass);
1115 }
1116 }
1117 else if (IsClient(client_p))
1118 {
1119 ServerStats->is_cl++;
1120 ServerStats->is_cbs += client_p->localClient->send.bytes;
1121 ServerStats->is_cbr += client_p->localClient->recv.bytes;
1122 ServerStats->is_cti += CurrentTime - client_p->firsttime;
1123 }
1124 else
1125 ServerStats->is_ni++;
1126
1127 if (!IsDead(client_p))
1128 {
1129 /* attempt to flush any pending dbufs. Evil, but .. -- adrian */
1130 /* there is still a chance that we might send data to this socket
1131 * even if it is marked as blocked (COMM_SELECT_READ handler is called
1132 * before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx
1133 */
1134 ClearSendqBlocked(client_p);
1135 send_queued_write(client_p);
1136 }
1137
1138 #ifdef HAVE_LIBCRYPTO
1139 if (client_p->localClient->fd.ssl)
1140 {
1141 SSL_set_shutdown(client_p->localClient->fd.ssl, SSL_RECEIVED_SHUTDOWN);
1142
1143 if (!SSL_shutdown(client_p->localClient->fd.ssl))
1144 SSL_shutdown(client_p->localClient->fd.ssl);
1145 }
1146 #endif
1147 if (client_p->localClient->fd.flags.open)
1148 fd_close(&client_p->localClient->fd);
1149
1150 if (HasServlink(client_p))
1151 {
1152 if (client_p->localClient->ctrlfd.flags.open)
1153 fd_close(&client_p->localClient->ctrlfd);
1154 }
1155
1156 dbuf_clear(&client_p->localClient->buf_sendq);
1157 dbuf_clear(&client_p->localClient->buf_recvq);
1158
1159 MyFree(client_p->localClient->passwd);
1160 detach_confs(client_p);
1161 client_p->from = NULL; /* ...this should catch them! >:) --msa */
1162 }
1163
1164 /*
1165 * report_error - report an error from an errno.
1166 * Record error to log and also send a copy to all *LOCAL* opers online.
1167 *
1168 * text is a *format* string for outputing error. It must
1169 * contain only two '%s', the first will be replaced
1170 * by the sockhost from the client_p, and the latter will
1171 * be taken from sys_errlist[errno].
1172 *
1173 * client_p if not NULL, is the *LOCAL* client associated with
1174 * the error.
1175 *
1176 * Cannot use perror() within daemon. stderr is closed in
1177 * ircd and cannot be used. And, worse yet, it might have
1178 * been reassigned to a normal connection...
1179 *
1180 * Actually stderr is still there IFF ircd was run with -s --Rodder
1181 */
1182 void
1183 report_error(int level, const char *text, const char *who, int error)
1184 {
1185 who = (who != NULL) ? who : "";
1186
1187 sendto_realops_flags(UMODE_DEBUG, level, text, who, strerror(error));
1188 log_oper_action(LOG_IOERR_TYPE, NULL, "%s %s %s\n", who, text, strerror(error));
1189 ilog(L_ERROR, text, who, strerror(error));
1190 }
1191
1192 /*
1193 * dead_link_on_write - report a write error if not already dead,
1194 * mark it as dead then exit it
1195 */
1196 void
1197 dead_link_on_write(struct Client *client_p, int ierrno)
1198 {
1199 dlink_node *ptr;
1200
1201 if (IsDefunct(client_p))
1202 return;
1203
1204 dbuf_clear(&client_p->localClient->buf_recvq);
1205 dbuf_clear(&client_p->localClient->buf_sendq);
1206
1207 assert(dlinkFind(&abort_list, client_p) == NULL);
1208 ptr = make_dlink_node();
1209 /* don't let exit_aborted_clients() finish yet */
1210 dlinkAddTail(client_p, ptr, &abort_list);
1211
1212 if (eac_next == NULL)
1213 eac_next = ptr;
1214
1215 SetDead(client_p); /* You are dead my friend */
1216 }
1217
1218 /*
1219 * dead_link_on_read - report a read error if not already dead,
1220 * mark it as dead then exit it
1221 */
1222 void
1223 dead_link_on_read(struct Client *client_p, int error)
1224 {
1225 char errmsg[255];
1226 int current_error;
1227
1228 if (IsDefunct(client_p))
1229 return;
1230
1231 dbuf_clear(&client_p->localClient->buf_recvq);
1232 dbuf_clear(&client_p->localClient->buf_sendq);
1233
1234 current_error = get_sockerr(client_p->localClient->fd.fd);
1235
1236 if (IsServer(client_p) || IsHandshake(client_p))
1237 {
1238 int connected = CurrentTime - client_p->firsttime;
1239
1240 if (error == 0)
1241 {
1242 /* Admins get the real IP */
1243 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1244 "Server %s closed the connection",
1245 get_client_name(client_p, SHOW_IP));
1246
1247 /* Opers get a masked IP */
1248 sendto_realops_flags(UMODE_ALL, L_OPER,
1249 "Server %s closed the connection",
1250 get_client_name(client_p, MASK_IP));
1251
1252 ilog(L_NOTICE, "Server %s closed the connection",
1253 get_client_name(client_p, SHOW_IP));
1254 }
1255 else
1256 {
1257 report_error(L_ADMIN, "Lost connection to %s: %d",
1258 get_client_name(client_p, SHOW_IP), current_error);
1259 report_error(L_OPER, "Lost connection to %s: %d",
1260 get_client_name(client_p, MASK_IP), current_error);
1261 }
1262
1263 sendto_realops_flags(UMODE_ALL, L_ALL,
1264 "%s had been connected for %d day%s, %2d:%02d:%02d",
1265 client_p->name, connected/86400,
1266 (connected/86400 == 1) ? "" : "s",
1267 (connected % 86400) / 3600, (connected % 3600) / 60,
1268 connected % 60);
1269 }
1270
1271 if (error == 0)
1272 strlcpy(errmsg, "Remote host closed the connection",
1273 sizeof(errmsg));
1274 else
1275 ircsprintf(errmsg, "Read error: %s",
1276 strerror(current_error));
1277
1278 exit_client(client_p, &me, errmsg);
1279 }
1280
1281 void
1282 exit_aborted_clients(void)
1283 {
1284 dlink_node *ptr;
1285 struct Client *target_p;
1286 const char *notice;
1287
1288 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1289 {
1290 target_p = ptr->data;
1291 eac_next = ptr->next;
1292
1293 if (target_p == NULL)
1294 {
1295 sendto_realops_flags(UMODE_ALL, L_ALL,
1296 "Warning: null client on abort_list!");
1297 dlinkDelete(ptr, &abort_list);
1298 free_dlink_node(ptr);
1299 continue;
1300 }
1301
1302 dlinkDelete(ptr, &abort_list);
1303
1304 if (IsSendQExceeded(target_p))
1305 notice = "Max SendQ exceeded";
1306 else
1307 notice = "Write error: connection closed";
1308
1309 exit_client(target_p, &me, notice);
1310 free_dlink_node(ptr);
1311 }
1312 }
1313
1314 /*
1315 * accept processing, this adds a form of "caller ID" to ircd
1316 *
1317 * If a client puts themselves into "caller ID only" mode,
1318 * only clients that match a client pointer they have put on
1319 * the accept list will be allowed to message them.
1320 *
1321 * Diane Bruce, "Dianora" db@db.net
1322 */
1323
1324 void
1325 del_accept(struct Accept *acceptvar, struct Client *client_p)
1326 {
1327 dlinkDelete(&acceptvar->node, &client_p->localClient->acceptlist);
1328
1329 MyFree(acceptvar->nick);
1330 MyFree(acceptvar->user);
1331 MyFree(acceptvar->host);
1332 MyFree(acceptvar);
1333 }
1334
1335 struct Accept *
1336 find_accept(const char *nick, const char *user,
1337 const char *host, struct Client *client_p, int do_match)
1338 {
1339 dlink_node *ptr = NULL;
1340 /* XXX We wouldn't need that if match() would return 0 on match */
1341 int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1342
1343 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1344 {
1345 struct Accept *acceptvar = ptr->data;
1346
1347 if (cmpfunc(acceptvar->nick, nick) == do_match &&
1348 cmpfunc(acceptvar->user, user) == do_match &&
1349 cmpfunc(acceptvar->host, host) == do_match)
1350 return acceptvar;
1351 }
1352
1353 return NULL;
1354 }
1355
1356 /* accept_message()
1357 *
1358 * inputs - pointer to source client
1359 * - pointer to target client
1360 * output - 1 if accept this message 0 if not
1361 * side effects - See if source is on target's allow list
1362 */
1363 int
1364 accept_message(struct Client *source,
1365 struct Client *target)
1366 {
1367 dlink_node *ptr = NULL;
1368
1369 if (source == target || find_accept(source->name, source->username,
1370 source->host, target, 1))
1371 return 1;
1372
1373 if (IsSoftCallerId(target))
1374 DLINK_FOREACH(ptr, target->channel.head)
1375 if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1376 return 1;
1377
1378 return 0;
1379 }
1380
1381 /* del_all_accepts()
1382 *
1383 * inputs - pointer to exiting client
1384 * output - NONE
1385 * side effects - Walk through given clients acceptlist and remove all entries
1386 */
1387 void
1388 del_all_accepts(struct Client *client_p)
1389 {
1390 dlink_node *ptr = NULL, *next_ptr = NULL;
1391
1392 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1393 del_accept(ptr->data, client_p);
1394 }
1395
1396 /* set_initial_nick()
1397 *
1398 * inputs
1399 * output
1400 * side effects -
1401 *
1402 * This function is only called to set up an initially registering
1403 * client.
1404 */
1405 void
1406 set_initial_nick(struct Client *source_p, const char *nick)
1407 {
1408 char buf[USERLEN + 1];
1409
1410 /* This had to be copied here to avoid problems.. */
1411 source_p->tsinfo = CurrentTime;
1412
1413 if (source_p->name[0])
1414 hash_del_client(source_p);
1415
1416 strlcpy(source_p->name, nick, sizeof(source_p->name));
1417 hash_add_client(source_p);
1418
1419 /* fd_desc is long enough */
1420 fd_note(&source_p->localClient->fd, "Nick: %s", nick);
1421
1422 if (source_p->flags & FLAGS_GOTUSER)
1423 {
1424 strlcpy(buf, source_p->username, sizeof(buf));
1425
1426 /*
1427 * USER already received, now we have NICK.
1428 * *NOTE* For servers "NICK" *must* precede the
1429 * user message (giving USER before NICK is possible
1430 * only for local client connection!). register_user
1431 * may reject the client and call exit_client for it
1432 * --must test this and exit m_nick too!!!
1433 */
1434 register_local_user(source_p, buf);
1435 }
1436 }
1437
1438 /* change_local_nick()
1439 *
1440 * inputs - pointer to server
1441 * - pointer to client
1442 * - nick
1443 * output -
1444 * side effects - changes nick of a LOCAL user
1445 */
1446 void
1447 change_local_nick(struct Client *client_p, struct Client *source_p, const char *nick)
1448 {
1449 int samenick = 0;
1450
1451 /*
1452 * Client just changing his/her nick. If he/she is
1453 * on a channel, send note of change to all clients
1454 * on that channel. Propagate notice to other servers.
1455 */
1456 if ((source_p->localClient->last_nick_change +
1457 ConfigFileEntry.max_nick_time) < CurrentTime)
1458 source_p->localClient->number_of_nick_changes = 0;
1459 source_p->localClient->last_nick_change = CurrentTime;
1460 source_p->localClient->number_of_nick_changes++;
1461
1462 if ((ConfigFileEntry.anti_nick_flood &&
1463 (source_p->localClient->number_of_nick_changes
1464 <= ConfigFileEntry.max_nick_changes)) ||
1465 !ConfigFileEntry.anti_nick_flood ||
1466 (IsOper(source_p) && ConfigFileEntry.no_oper_flood))
1467 {
1468 samenick = !irccmp(source_p->name, nick);
1469 if (!samenick)
1470 source_p->tsinfo = CurrentTime;
1471
1472 /* XXX - the format of this notice should eventually be changed
1473 * to either %s[%s@%s], or even better would be get_client_name() -bill
1474 */
1475 sendto_realops_flags(UMODE_NCHANGE, L_ALL, "Nick change: From %s to %s [%s@%s]",
1476 source_p->name, nick, source_p->username, source_p->host);
1477 sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s",
1478 source_p->name, source_p->username,
1479 source_p->host, nick);
1480
1481 add_history(source_p, 1);
1482
1483 /* Only hubs care about lazy link nicks not being sent on yet
1484 * lazylink leafs/leafs always send their nicks up to hub,
1485 * hence must always propagate nick changes.
1486 * hubs might not propagate a nick change, if the leaf
1487 * does not know about that client yet.
1488 */
1489 sendto_server(client_p, source_p, NULL, CAP_TS6, NOCAPS,
1490 ":%s NICK %s :%lu",
1491 ID(source_p), nick, (unsigned long)source_p->tsinfo);
1492 sendto_server(client_p, source_p, NULL, NOCAPS, CAP_TS6,
1493 ":%s NICK %s :%lu",
1494 source_p->name, nick, (unsigned long)source_p->tsinfo);
1495 }
1496 else
1497 {
1498 sendto_one(source_p, form_str(ERR_NICKTOOFAST),
1499 me.name, source_p->name, source_p->name,
1500 nick, ConfigFileEntry.max_nick_time);
1501 return;
1502 }
1503
1504 /* Finally, add to hash */
1505 assert(source_p->name[0]);
1506
1507 hash_del_client(source_p);
1508 if (!samenick)
1509 hash_check_watch(source_p, RPL_LOGOFF);
1510 strcpy(source_p->name, nick);
1511 hash_add_client(source_p);
1512
1513 if (!samenick)
1514 hash_check_watch(source_p, RPL_LOGON);
1515
1516 /* fd_desc is long enough */
1517 fd_note(&client_p->localClient->fd, "Nick: %s", nick);
1518 }
1519
1520 /* log_user_exit()
1521 *
1522 * inputs - pointer to connecting client
1523 * output - NONE
1524 * side effects - Current exiting client is logged to
1525 * either SYSLOG or to file.
1526 */
1527 void
1528 log_user_exit(struct Client *source_p)
1529 {
1530 time_t on_for = CurrentTime - source_p->firsttime;
1531 #ifdef SYSLOG_USERS
1532 if (IsClient(source_p))
1533 {
1534 ilog(L_INFO, "%s (%3ld:%02ld:%02ld): %s!%s@%s %llu/%llu\n",
1535 myctime(source_p->firsttime),
1536 (signed long) on_for / 3600,
1537 (signed long) (on_for % 3600)/60,
1538 (signed long) on_for % 60,
1539 source_p->name, source_p->username, source_p->host,
1540 source_p->localClient->send.bytes>>10,
1541 source_p->localClient->recv.bytes>>10);
1542 }
1543 #else
1544 {
1545 char linebuf[BUFSIZ];
1546
1547 /*
1548 * This conditional makes the logfile active only after
1549 * it's been created - thus logging can be turned off by
1550 * removing the file.
1551 * -Taner
1552 */
1553 if (IsClient(source_p))
1554 {
1555 if (user_log_fb == NULL)
1556 {
1557 if ((ConfigLoggingEntry.userlog[0] != '\0') &&
1558 (user_log_fb = fbopen(ConfigLoggingEntry.userlog, "r")) != NULL)
1559 {
1560 fbclose(user_log_fb);
1561 user_log_fb = fbopen(ConfigLoggingEntry.userlog, "a");
1562 }
1563 }
1564
1565 if (user_log_fb != NULL)
1566 {
1567 size_t nbytes = ircsprintf(linebuf,
1568 "%s (%3ld:%02ld:%02ld): %s!%s@%s %llu/%llu\n",
1569 myctime(source_p->firsttime),
1570 (signed long) on_for / 3600,
1571 (signed long) (on_for % 3600)/60,
1572 (signed long) on_for % 60,
1573 source_p->name, source_p->username, source_p->host,
1574 source_p->localClient->send.bytes>>10,
1575 source_p->localClient->recv.bytes>>10);
1576 fbputs(linebuf, user_log_fb, nbytes);
1577 }
1578 }
1579 }
1580 #endif
1581 }
1582
1583
1584 /* log_oper_action()
1585 *
1586 * inputs - type of oper log entry
1587 * - pointer to oper
1588 * - const char *pattern == format string
1589 * - var args for format string
1590 * output - none
1591 * side effects - corresponding log is written to, if its present.
1592 *
1593 * rewritten sept 5 2005 - Dianora
1594 */
1595 void
1596 log_oper_action(int log_type, const struct Client *source_p,
1597 const char *pattern, ...)
1598 {
1599 va_list args;
1600 char linebuf[IRCD_BUFSIZE];
1601 FBFILE *log_fb;
1602 char *logfile;
1603 const char *log_message;
1604 size_t nbytes;
1605 size_t n_preamble;
1606 char *p;
1607
1608 switch(log_type)
1609 {
1610 case LOG_OPER_TYPE:
1611 logfile = ConfigLoggingEntry.operlog;
1612 log_message = "OPER";
1613 break;
1614 case LOG_FAILED_OPER_TYPE:
1615 logfile = ConfigLoggingEntry.failed_operlog;
1616 log_message = "FAILED OPER";
1617 break;
1618 case LOG_KLINE_TYPE:
1619 logfile = ConfigLoggingEntry.klinelog;
1620 log_message = "KLINE";
1621 break;
1622 case LOG_RKLINE_TYPE:
1623 logfile = ConfigLoggingEntry.klinelog;
1624 log_message = "RKLINE";
1625 break;
1626 case LOG_DLINE_TYPE:
1627 logfile = ConfigLoggingEntry.klinelog;
1628 log_message = "DLINE";
1629 break;
1630 case LOG_TEMP_DLINE_TYPE:
1631 logfile = ConfigLoggingEntry.klinelog;
1632 log_message = "TEMP DLINE";
1633 break;
1634 case LOG_TEMP_KLINE_TYPE:
1635 logfile = ConfigLoggingEntry.klinelog;
1636 log_message = "TEMP KLINE";
1637 break;
1638 case LOG_GLINE_TYPE:
1639 logfile = ConfigLoggingEntry.glinelog;
1640 log_message = "GLINE";
1641 break;
1642 case LOG_KILL_TYPE:
1643 logfile = ConfigLoggingEntry.killlog;
1644 log_message = "KILL";
1645 break;
1646 case LOG_IOERR_TYPE:
1647 logfile = ConfigLoggingEntry.ioerrlog;
1648 log_message = "IO ERR";
1649 break;
1650 default:
1651 return;
1652 }
1653
1654 if (*logfile == '\0')
1655 return;
1656
1657 p = linebuf;
1658 if (source_p != NULL)
1659 {
1660 n_preamble = ircsprintf(linebuf, "%s %s by (%s!%s@%s) :",
1661 myctime(CurrentTime), log_message,
1662 source_p->name, source_p->username, source_p->host);
1663
1664 }
1665 else
1666 {
1667 n_preamble = ircsprintf(linebuf, "%s %s :",
1668 myctime(CurrentTime), log_message);
1669 }
1670
1671 p += n_preamble;
1672
1673 if ((log_fb = fbopen(logfile, "r")) != NULL)
1674 {
1675 fbclose(log_fb);
1676 log_fb = fbopen(logfile, "a");
1677 if (log_fb == NULL)
1678 return;
1679 va_start(args, pattern);
1680 /* XXX add check for IRCD_BUFSIZE-(n_preamble+1) < 0 ? -db */
1681 nbytes = vsnprintf(p, IRCD_BUFSIZE-(n_preamble+1), pattern, args);
1682 nbytes += n_preamble;
1683 va_end(args);
1684 fbputs(linebuf, log_fb, nbytes);
1685 fbclose(log_fb);
1686 }
1687 }

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