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

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Revision 385 - (show annotations)
Tue Jan 31 12:24:23 2006 UTC (14 years, 7 months ago) by michael
File MIME type: text/x-chdr
File size: 49862 byte(s)
- Forward-port SoftCallerId fix from 7.2

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, make_dlink_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 /* This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
946 * STAT_HANDSHAKE or STAT_UNKNOWN
947 * all of which are lumped together into unknown_list
948 *
949 * In all above cases IsRegistered() will not be true.
950 */
951 if (!IsRegistered(source_p))
952 {
953 if ((m = dlinkFindDelete(&unknown_list, source_p)) != NULL)
954 free_dlink_node(m);
955 }
956 else if (IsClient(source_p))
957 {
958 Count.local--;
959
960 if (IsOper(source_p))
961 {
962 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
963 free_dlink_node(m);
964 }
965
966 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
967 if (source_p->localClient->list_task != NULL)
968 free_list_task(source_p->localClient->list_task, source_p);
969 hash_del_watch_list(source_p);
970 sendto_realops_flags(UMODE_CCONN, L_ALL, "Client exiting: %s (%s@%s) [%s] [%s]",
971 source_p->name, source_p->username, source_p->host, comment,
972 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
973 "255.255.255.255" : source_p->sockhost);
974 }
975
976 /* As soon as a client is known to be a server of some sort
977 * it has to be put on the serv_list, or SJOIN's to this new server
978 * from the connect burst will not be seen.
979 */
980 if (IsServer(source_p) || IsConnecting(source_p) ||
981 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 {
991 Count.myserver--;
992 if (ServerInfo.hub)
993 remove_lazylink_flags(source_p->localClient->serverMask);
994 else
995 uplink = NULL;
996 }
997 }
998
999 log_user_exit(source_p);
1000
1001 if (!IsDead(source_p))
1002 {
1003 if (IsServer(source_p))
1004 {
1005 /* for them, we are exiting the network */
1006 sendto_one(source_p, ":%s SQUIT %s :%s",
1007 ID_or_name(from, source_p), me.name, comment);
1008 }
1009
1010 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
1011 source_p->host, comment);
1012 }
1013
1014 /*
1015 ** Currently only server connections can have
1016 ** depending remote clients here, but it does no
1017 ** harm to check for all local clients. In
1018 ** future some other clients than servers might
1019 ** have remotes too...
1020 **
1021 ** Close the Client connection first and mark it
1022 ** so that no messages are attempted to send to it.
1023 ** Remember it makes source_p->from == NULL.
1024 */
1025 close_connection(source_p);
1026 }
1027
1028 if (IsServer(source_p))
1029 {
1030 char splitstr[HOSTLEN + HOSTLEN + 2];
1031
1032 /* This shouldn't ever happen */
1033 assert(source_p->serv != NULL && source_p->servptr != NULL);
1034
1035 if (ConfigServerHide.hide_servers)
1036 /* set netsplit message to "*.net *.split" to still show
1037 * that its a split, but hide the servers splitting
1038 */
1039 strcpy(splitstr, "*.net *.split");
1040 else
1041 snprintf(splitstr, sizeof(splitstr), "%s %s",
1042 source_p->servptr->name, source_p->name);
1043
1044 remove_dependents(source_p, from->from, comment, splitstr);
1045
1046 if (source_p->servptr == &me)
1047 {
1048 sendto_realops_flags(UMODE_ALL, L_ALL,
1049 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1050 source_p->name, (int)(CurrentTime - source_p->firsttime),
1051 source_p->localClient->send.bytes >> 10,
1052 source_p->localClient->recv.bytes >> 10);
1053 ilog(L_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1054 source_p->name, (int)(CurrentTime - source_p->firsttime),
1055 source_p->localClient->send.bytes >> 10,
1056 source_p->localClient->recv.bytes >> 10);
1057 }
1058 }
1059 else if (IsClient(source_p) && !IsKilled(source_p))
1060 {
1061 sendto_server(NULL, source_p, NULL, CAP_TS6, NOCAPS, NOFLAGS,
1062 ":%s QUIT :%s", ID(source_p), comment);
1063 sendto_server(NULL, source_p, NULL, NOCAPS, CAP_TS6, NOFLAGS,
1064 ":%s QUIT :%s", source_p->name, comment);
1065 }
1066
1067 /* The client *better* be off all of the lists */
1068 assert(dlinkFind(&unknown_list, source_p) == NULL);
1069 assert(dlinkFind(&local_client_list, source_p) == NULL);
1070 assert(dlinkFind(&serv_list, source_p) == NULL);
1071 assert(dlinkFind(&oper_list, source_p) == NULL);
1072
1073 exit_one_client(source_p, comment);
1074 }
1075
1076 /*
1077 * close_connection
1078 * Close the physical connection. This function must make
1079 * MyConnect(client_p) == FALSE, and set client_p->from == NULL.
1080 */
1081 static void
1082 close_connection(struct Client *client_p)
1083 {
1084 struct ConfItem *conf;
1085 struct AccessItem *aconf;
1086 struct ClassItem *aclass;
1087
1088 assert(NULL != client_p);
1089
1090 if (IsServer(client_p))
1091 {
1092 ServerStats->is_sv++;
1093 ServerStats->is_sbs += client_p->localClient->send.bytes;
1094 ServerStats->is_sbr += client_p->localClient->recv.bytes;
1095 ServerStats->is_sti += CurrentTime - client_p->firsttime;
1096
1097 /* XXX Does this even make any sense at all anymore?
1098 * scheduling a 'quick' reconnect could cause a pile of
1099 * nick collides under TSora protocol... -db
1100 */
1101 /*
1102 * If the connection has been up for a long amount of time, schedule
1103 * a 'quick' reconnect, else reset the next-connect cycle.
1104 */
1105 if ((conf = find_exact_name_conf(SERVER_TYPE,
1106 client_p->name, client_p->username,
1107 client_p->host)))
1108 {
1109 /*
1110 * Reschedule a faster reconnect, if this was a automatically
1111 * connected configuration entry. (Note that if we have had
1112 * a rehash in between, the status has been changed to
1113 * CONF_ILLEGAL). But only do this if it was a "good" link.
1114 */
1115 aconf = &conf->conf.AccessItem;
1116 aclass = &((struct ConfItem *)aconf->class_ptr)->conf.ClassItem;
1117 aconf->hold = time(NULL);
1118 aconf->hold += (aconf->hold - client_p->since > HANGONGOODLINK) ?
1119 HANGONRETRYDELAY : ConFreq(aclass);
1120 if (nextconnect > aconf->hold)
1121 nextconnect = aconf->hold;
1122 }
1123 }
1124 else if (IsClient(client_p))
1125 {
1126 ServerStats->is_cl++;
1127 ServerStats->is_cbs += client_p->localClient->send.bytes;
1128 ServerStats->is_cbr += client_p->localClient->recv.bytes;
1129 ServerStats->is_cti += CurrentTime - client_p->firsttime;
1130 }
1131 else
1132 ServerStats->is_ni++;
1133
1134 if (!IsDead(client_p))
1135 {
1136 /* attempt to flush any pending dbufs. Evil, but .. -- adrian */
1137 /* there is still a chance that we might send data to this socket
1138 * even if it is marked as blocked (COMM_SELECT_READ handler is called
1139 * before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx
1140 */
1141 ClearSendqBlocked(client_p);
1142 send_queued_write(client_p);
1143 }
1144
1145 #ifdef HAVE_LIBCRYPTO
1146 if (client_p->localClient->fd.ssl)
1147 SSL_shutdown(client_p->localClient->fd.ssl);
1148 #endif
1149 if (client_p->localClient->fd.flags.open)
1150 fd_close(&client_p->localClient->fd);
1151
1152 if (HasServlink(client_p))
1153 {
1154 if (client_p->localClient->ctrlfd.flags.open)
1155 fd_close(&client_p->localClient->ctrlfd);
1156 }
1157
1158 dbuf_clear(&client_p->localClient->buf_sendq);
1159 dbuf_clear(&client_p->localClient->buf_recvq);
1160
1161 MyFree(client_p->localClient->passwd);
1162 detach_confs(client_p);
1163 client_p->from = NULL; /* ...this should catch them! >:) --msa */
1164 }
1165
1166 /*
1167 * report_error - report an error from an errno.
1168 * Record error to log and also send a copy to all *LOCAL* opers online.
1169 *
1170 * text is a *format* string for outputing error. It must
1171 * contain only two '%s', the first will be replaced
1172 * by the sockhost from the client_p, and the latter will
1173 * be taken from sys_errlist[errno].
1174 *
1175 * client_p if not NULL, is the *LOCAL* client associated with
1176 * the error.
1177 *
1178 * Cannot use perror() within daemon. stderr is closed in
1179 * ircd and cannot be used. And, worse yet, it might have
1180 * been reassigned to a normal connection...
1181 *
1182 * Actually stderr is still there IFF ircd was run with -s --Rodder
1183 */
1184 void
1185 report_error(int level, const char *text, const char *who, int error)
1186 {
1187 who = (who != NULL) ? who : "";
1188
1189 sendto_realops_flags(UMODE_DEBUG, level, text, who, strerror(error));
1190 log_oper_action(LOG_IOERR_TYPE, NULL, "%s %s %s\n", who, text, strerror(error));
1191 ilog(L_ERROR, text, who, strerror(error));
1192 }
1193
1194 /*
1195 * dead_link_on_write - report a write error if not already dead,
1196 * mark it as dead then exit it
1197 */
1198 void
1199 dead_link_on_write(struct Client *client_p, int ierrno)
1200 {
1201 dlink_node *ptr;
1202
1203 if (IsDefunct(client_p))
1204 return;
1205
1206 dbuf_clear(&client_p->localClient->buf_recvq);
1207 dbuf_clear(&client_p->localClient->buf_sendq);
1208
1209 assert(dlinkFind(&abort_list, client_p) == NULL);
1210 ptr = make_dlink_node();
1211 /* don't let exit_aborted_clients() finish yet */
1212 dlinkAddTail(client_p, ptr, &abort_list);
1213
1214 if (eac_next == NULL)
1215 eac_next = ptr;
1216
1217 SetDead(client_p); /* You are dead my friend */
1218 }
1219
1220 /*
1221 * dead_link_on_read - report a read error if not already dead,
1222 * mark it as dead then exit it
1223 */
1224 void
1225 dead_link_on_read(struct Client *client_p, int error)
1226 {
1227 char errmsg[255];
1228 int current_error;
1229
1230 if (IsDefunct(client_p))
1231 return;
1232
1233 dbuf_clear(&client_p->localClient->buf_recvq);
1234 dbuf_clear(&client_p->localClient->buf_sendq);
1235
1236 current_error = get_sockerr(client_p->localClient->fd.fd);
1237
1238 if (IsServer(client_p) || IsHandshake(client_p))
1239 {
1240 int connected = CurrentTime - client_p->firsttime;
1241
1242 if (error == 0)
1243 {
1244 /* Admins get the real IP */
1245 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1246 "Server %s closed the connection",
1247 get_client_name(client_p, SHOW_IP));
1248
1249 /* Opers get a masked IP */
1250 sendto_realops_flags(UMODE_ALL, L_OPER,
1251 "Server %s closed the connection",
1252 get_client_name(client_p, MASK_IP));
1253
1254 ilog(L_NOTICE, "Server %s closed the connection",
1255 get_client_name(client_p, SHOW_IP));
1256 }
1257 else
1258 {
1259 report_error(L_ADMIN, "Lost connection to %s: %d",
1260 get_client_name(client_p, SHOW_IP), current_error);
1261 report_error(L_OPER, "Lost connection to %s: %d",
1262 get_client_name(client_p, MASK_IP), current_error);
1263 }
1264
1265 sendto_realops_flags(UMODE_ALL, L_ALL,
1266 "%s had been connected for %d day%s, %2d:%02d:%02d",
1267 client_p->name, connected/86400,
1268 (connected/86400 == 1) ? "" : "s",
1269 (connected % 86400) / 3600, (connected % 3600) / 60,
1270 connected % 60);
1271 }
1272
1273 if (error == 0)
1274 strlcpy(errmsg, "Remote host closed the connection",
1275 sizeof(errmsg));
1276 else
1277 ircsprintf(errmsg, "Read error: %s",
1278 strerror(current_error));
1279
1280 exit_client(client_p, &me, errmsg);
1281 }
1282
1283 void
1284 exit_aborted_clients(void)
1285 {
1286 dlink_node *ptr;
1287 struct Client *target_p;
1288 const char *notice;
1289
1290 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1291 {
1292 target_p = ptr->data;
1293 eac_next = ptr->next;
1294
1295 if (target_p == NULL)
1296 {
1297 sendto_realops_flags(UMODE_ALL, L_ALL,
1298 "Warning: null client on abort_list!");
1299 dlinkDelete(ptr, &abort_list);
1300 free_dlink_node(ptr);
1301 continue;
1302 }
1303
1304 dlinkDelete(ptr, &abort_list);
1305
1306 if (IsSendQExceeded(target_p))
1307 notice = "Max SendQ exceeded";
1308 else
1309 notice = "Write error: connection closed";
1310
1311 exit_client(target_p, &me, notice);
1312 free_dlink_node(ptr);
1313 }
1314 }
1315
1316 /*
1317 * accept processing, this adds a form of "caller ID" to ircd
1318 *
1319 * If a client puts themselves into "caller ID only" mode,
1320 * only clients that match a client pointer they have put on
1321 * the accept list will be allowed to message them.
1322 *
1323 * Diane Bruce, "Dianora" db@db.net
1324 */
1325
1326 void
1327 del_accept(struct Accept *acceptvar, struct Client *client_p)
1328 {
1329 dlinkDelete(&acceptvar->node, &client_p->localClient->acceptlist);
1330
1331 MyFree(acceptvar->nick);
1332 MyFree(acceptvar->user);
1333 MyFree(acceptvar->host);
1334 MyFree(acceptvar);
1335 }
1336
1337 struct Accept *
1338 find_accept(const char *nick, const char *user,
1339 const char *host, struct Client *client_p, int do_match)
1340 {
1341 dlink_node *ptr = NULL;
1342 /* XXX We wouldn't need that if match() would return 0 on match */
1343 int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1344
1345 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1346 {
1347 struct Accept *acceptvar = ptr->data;
1348
1349 if (cmpfunc(acceptvar->nick, nick) == do_match &&
1350 cmpfunc(acceptvar->user, user) == do_match &&
1351 cmpfunc(acceptvar->host, host) == do_match)
1352 return acceptvar;
1353 }
1354
1355 return NULL;
1356 }
1357
1358 /* accept_message()
1359 *
1360 * inputs - pointer to source client
1361 * - pointer to target client
1362 * output - 1 if accept this message 0 if not
1363 * side effects - See if source is on target's allow list
1364 */
1365 int
1366 accept_message(struct Client *source,
1367 struct Client *target)
1368 {
1369 dlink_node *ptr = NULL;
1370
1371 if (source == target || find_accept(source->name, source->username,
1372 source->host, target, 1))
1373 return 1;
1374
1375 if (IsSoftCallerId(target))
1376 DLINK_FOREACH(ptr, target->channel.head)
1377 if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1378 return 1;
1379
1380 return 0;
1381 }
1382
1383 /* del_all_accepts()
1384 *
1385 * inputs - pointer to exiting client
1386 * output - NONE
1387 * side effects - Walk through given clients acceptlist and remove all entries
1388 */
1389 void
1390 del_all_accepts(struct Client *client_p)
1391 {
1392 dlink_node *ptr = NULL, *next_ptr = NULL;
1393
1394 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1395 del_accept(ptr->data, client_p);
1396 }
1397
1398 /* set_initial_nick()
1399 *
1400 * inputs
1401 * output
1402 * side effects -
1403 *
1404 * This function is only called to set up an initially registering
1405 * client.
1406 */
1407 void
1408 set_initial_nick(struct Client *client_p, struct Client *source_p,
1409 const char *nick)
1410 {
1411 char buf[USERLEN + 1];
1412
1413 /* Client setting NICK the first time */
1414
1415 /* This had to be copied here to avoid problems.. */
1416 source_p->tsinfo = CurrentTime;
1417
1418 if (source_p->name[0])
1419 hash_del_client(source_p);
1420
1421 strlcpy(source_p->name, nick, sizeof(source_p->name));
1422 hash_add_client(source_p);
1423
1424 /* fd_desc is long enough */
1425 fd_note(&client_p->localClient->fd, "Nick: %s", nick);
1426
1427 /* They have the nick they want now.. */
1428 client_p->localClient->llname[0] = '\0';
1429
1430 if (source_p->flags & FLAGS_GOTUSER)
1431 {
1432 strlcpy(buf, source_p->username, sizeof(buf));
1433
1434 /*
1435 * USER already received, now we have NICK.
1436 * *NOTE* For servers "NICK" *must* precede the
1437 * user message (giving USER before NICK is possible
1438 * only for local client connection!). register_user
1439 * may reject the client and call exit_client for it
1440 * --must test this and exit m_nick too!!!
1441 */
1442 register_local_user(client_p, source_p, nick, buf);
1443 }
1444 }
1445
1446 /* change_local_nick()
1447 *
1448 * inputs - pointer to server
1449 * - pointer to client
1450 * - nick
1451 * output -
1452 * side effects - changes nick of a LOCAL user
1453 */
1454 void
1455 change_local_nick(struct Client *client_p, struct Client *source_p, const char *nick)
1456 {
1457 int samenick = 0;
1458
1459 /*
1460 * Client just changing his/her nick. If he/she is
1461 * on a channel, send note of change to all clients
1462 * on that channel. Propagate notice to other servers.
1463 */
1464 if ((source_p->localClient->last_nick_change +
1465 ConfigFileEntry.max_nick_time) < CurrentTime)
1466 source_p->localClient->number_of_nick_changes = 0;
1467 source_p->localClient->last_nick_change = CurrentTime;
1468 source_p->localClient->number_of_nick_changes++;
1469
1470 if ((ConfigFileEntry.anti_nick_flood &&
1471 (source_p->localClient->number_of_nick_changes
1472 <= ConfigFileEntry.max_nick_changes)) ||
1473 !ConfigFileEntry.anti_nick_flood ||
1474 (IsOper(source_p) && ConfigFileEntry.no_oper_flood))
1475 {
1476 samenick = !irccmp(source_p->name, nick);
1477 if (!samenick)
1478 source_p->tsinfo = CurrentTime;
1479
1480 /* XXX - the format of this notice should eventually be changed
1481 * to either %s[%s@%s], or even better would be get_client_name() -bill
1482 */
1483 sendto_realops_flags(UMODE_NCHANGE, L_ALL, "Nick change: From %s to %s [%s@%s]",
1484 source_p->name, nick, source_p->username, source_p->host);
1485 sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s",
1486 source_p->name, source_p->username,
1487 source_p->host, nick);
1488
1489 add_history(source_p, 1);
1490
1491 /* Only hubs care about lazy link nicks not being sent on yet
1492 * lazylink leafs/leafs always send their nicks up to hub,
1493 * hence must always propagate nick changes.
1494 * hubs might not propagate a nick change, if the leaf
1495 * does not know about that client yet.
1496 */
1497 sendto_server(client_p, source_p, NULL, CAP_TS6, NOCAPS, NOFLAGS,
1498 ":%s NICK %s :%lu",
1499 ID(source_p), nick, (unsigned long)source_p->tsinfo);
1500 sendto_server(client_p, source_p, NULL, NOCAPS, CAP_TS6, NOFLAGS,
1501 ":%s NICK %s :%lu",
1502 source_p->name, nick, (unsigned long)source_p->tsinfo);
1503 }
1504 else
1505 {
1506 sendto_one(source_p, form_str(ERR_NICKTOOFAST),
1507 me.name, source_p->name, source_p->name,
1508 nick, ConfigFileEntry.max_nick_time);
1509 return;
1510 }
1511
1512 /* Finally, add to hash */
1513 assert(source_p->name[0]);
1514
1515 hash_del_client(source_p);
1516 if (!samenick)
1517 hash_check_watch(source_p, RPL_LOGOFF);
1518 strcpy(source_p->name, nick);
1519 hash_add_client(source_p);
1520
1521 if (!samenick)
1522 hash_check_watch(source_p, RPL_LOGON);
1523
1524 /* fd_desc is long enough */
1525 fd_note(&client_p->localClient->fd, "Nick: %s", nick);
1526 }
1527
1528 /* log_user_exit()
1529 *
1530 * inputs - pointer to connecting client
1531 * output - NONE
1532 * side effects - Current exiting client is logged to
1533 * either SYSLOG or to file.
1534 */
1535 void
1536 log_user_exit(struct Client *source_p)
1537 {
1538 time_t on_for = CurrentTime - source_p->firsttime;
1539 #ifdef SYSLOG_USERS
1540 if (IsClient(source_p))
1541 {
1542 ilog(L_INFO, "%s (%3ld:%02ld:%02ld): %s!%s@%s %llu/%llu\n",
1543 myctime(source_p->firsttime),
1544 (signed long) on_for / 3600,
1545 (signed long) (on_for % 3600)/60,
1546 (signed long) on_for % 60,
1547 source_p->name, source_p->username, source_p->host,
1548 source_p->localClient->send.bytes>>10,
1549 source_p->localClient->recv.bytes>>10);
1550 }
1551 #else
1552 {
1553 char linebuf[BUFSIZ];
1554
1555 /*
1556 * This conditional makes the logfile active only after
1557 * it's been created - thus logging can be turned off by
1558 * removing the file.
1559 * -Taner
1560 */
1561 if (IsClient(source_p))
1562 {
1563 if (user_log_fb == NULL)
1564 {
1565 if ((ConfigLoggingEntry.userlog[0] != '\0') &&
1566 (user_log_fb = fbopen(ConfigLoggingEntry.userlog, "r")) != NULL)
1567 {
1568 fbclose(user_log_fb);
1569 user_log_fb = fbopen(ConfigLoggingEntry.userlog, "a");
1570 }
1571 }
1572
1573 if (user_log_fb != NULL)
1574 {
1575 size_t nbytes = ircsprintf(linebuf,
1576 "%s (%3ld:%02ld:%02ld): %s!%s@%s %llu/%llu\n",
1577 myctime(source_p->firsttime),
1578 (signed long) on_for / 3600,
1579 (signed long) (on_for % 3600)/60,
1580 (signed long) on_for % 60,
1581 source_p->name, source_p->username, source_p->host,
1582 source_p->localClient->send.bytes>>10,
1583 source_p->localClient->recv.bytes>>10);
1584 fbputs(linebuf, user_log_fb, nbytes);
1585 }
1586 }
1587 }
1588 #endif
1589 }
1590
1591
1592 /* log_oper_action()
1593 *
1594 * inputs - type of oper log entry
1595 * - pointer to oper
1596 * - const char *pattern == format string
1597 * - var args for format string
1598 * output - none
1599 * side effects - corresponding log is written to, if its present.
1600 *
1601 * rewritten sept 5 2005 - Dianora
1602 */
1603 void
1604 log_oper_action(int log_type, const struct Client *source_p,
1605 const char *pattern, ...)
1606 {
1607 va_list args;
1608 char linebuf[IRCD_BUFSIZE];
1609 FBFILE *log_fb;
1610 char *logfile;
1611 const char *log_message;
1612 size_t nbytes;
1613 size_t n_preamble;
1614 char *p;
1615
1616 switch(log_type)
1617 {
1618 case LOG_OPER_TYPE:
1619 logfile = ConfigLoggingEntry.operlog;
1620 log_message = "OPER";
1621 break;
1622 case LOG_FAILED_OPER_TYPE:
1623 logfile = ConfigLoggingEntry.failed_operlog;
1624 log_message = "FAILED OPER";
1625 break;
1626 case LOG_KLINE_TYPE:
1627 logfile = ConfigLoggingEntry.klinelog;
1628 log_message = "KLINE";
1629 break;
1630 case LOG_RKLINE_TYPE:
1631 logfile = ConfigLoggingEntry.klinelog;
1632 log_message = "RKLINE";
1633 break;
1634 case LOG_DLINE_TYPE:
1635 logfile = ConfigLoggingEntry.klinelog;
1636 log_message = "DLINE";
1637 break;
1638 case LOG_TEMP_DLINE_TYPE:
1639 logfile = ConfigLoggingEntry.klinelog;
1640 log_message = "TEMP DLINE";
1641 break;
1642 case LOG_TEMP_KLINE_TYPE:
1643 logfile = ConfigLoggingEntry.klinelog;
1644 log_message = "TEMP KLINE";
1645 break;
1646 case LOG_GLINE_TYPE:
1647 logfile = ConfigLoggingEntry.glinelog;
1648 log_message = "GLINE";
1649 break;
1650 case LOG_KILL_TYPE:
1651 logfile = ConfigLoggingEntry.killlog;
1652 log_message = "KILL";
1653 break;
1654 case LOG_IOERR_TYPE:
1655 logfile = ConfigLoggingEntry.ioerrlog;
1656 log_message = "IO ERR";
1657 break;
1658 default:
1659 return;
1660 }
1661
1662 if (*logfile == '\0')
1663 return;
1664
1665 p = linebuf;
1666 if (source_p != NULL)
1667 {
1668 n_preamble = ircsprintf(linebuf, "%s %s by (%s!%s@%s) :",
1669 myctime(CurrentTime), log_message,
1670 source_p->name, source_p->username, source_p->host);
1671
1672 }
1673 else
1674 {
1675 n_preamble = ircsprintf(linebuf, "%s %s :",
1676 myctime(CurrentTime), log_message);
1677 }
1678
1679 p += n_preamble;
1680
1681 if ((log_fb = fbopen(logfile, "r")) != NULL)
1682 {
1683 fbclose(log_fb);
1684 log_fb = fbopen(logfile, "a");
1685 if (log_fb == NULL)
1686 return;
1687 va_start(args, pattern);
1688 /* XXX add check for IRCD_BUFSIZE-(n_preamble+1) < 0 ? -db */
1689 nbytes = vsnprintf(p, IRCD_BUFSIZE-(n_preamble+1), pattern, args);
1690 nbytes += n_preamble;
1691 va_end(args);
1692 fbputs(linebuf, log_fb, nbytes);
1693 fbclose(log_fb);
1694 }
1695 }

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