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root/svn/ircd-hybrid/trunk/src/client.c
Revision: 1176
Committed: Sun Aug 14 11:24:24 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-8/src/client.c
File size: 38948 byte(s)
Log Message:
- remove idle-time klines
- rename LocalUser.last to LocalUser.last_privmsg
- m_message.c: reset source_p->last_privmsg even if a client is messaging itself


File Contents

# Content
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 "list.h"
27 #include "client.h"
28 #include "channel_mode.h"
29 #include "common.h"
30 #include "event.h"
31 #include "fdlist.h"
32 #include "hash.h"
33 #include "irc_string.h"
34 #include "ircd.h"
35 #include "s_gline.h"
36 #include "numeric.h"
37 #include "packet.h"
38 #include "s_auth.h"
39 #include "s_bsd.h"
40 #include "s_conf.h"
41 #include "s_log.h"
42 #include "s_misc.h"
43 #include "s_serv.h"
44 #include "send.h"
45 #include "whowas.h"
46 #include "s_user.h"
47 #include "dbuf.h"
48 #include "memory.h"
49 #include "hostmask.h"
50 #include "balloc.h"
51 #include "listener.h"
52 #include "irc_res.h"
53 #include "userhost.h"
54 #include "watch.h"
55
56 dlink_list listing_client_list = { NULL, NULL, 0 };
57 /* Pointer to beginning of Client list */
58 dlink_list global_client_list = {NULL, NULL, 0};
59 /* unknown/client pointer lists */
60 dlink_list unknown_list = {NULL, NULL, 0};
61 dlink_list local_client_list = {NULL, NULL, 0};
62 dlink_list serv_list = {NULL, NULL, 0};
63 dlink_list global_serv_list = {NULL, NULL, 0};
64 dlink_list oper_list = {NULL, NULL, 0};
65
66 static EVH check_pings;
67
68 static BlockHeap *client_heap = NULL;
69 static BlockHeap *lclient_heap = NULL;
70
71 static dlink_list dead_list = { NULL, NULL, 0};
72 static dlink_list abort_list = { NULL, NULL, 0};
73
74 static dlink_node *eac_next; /* next aborted client to exit */
75
76 static void check_pings_list(dlink_list *);
77 static void check_unknowns_list(void);
78 static void ban_them(struct Client *, struct ConfItem *);
79
80
81 /* init_client()
82 *
83 * inputs - NONE
84 * output - NONE
85 * side effects - initialize client free memory
86 */
87 void
88 init_client(void)
89 {
90 /* start off the check ping event .. -- adrian
91 * Every 30 seconds is plenty -- db
92 */
93 client_heap = BlockHeapCreate("client", sizeof(struct Client), CLIENT_HEAP_SIZE);
94 lclient_heap = BlockHeapCreate("local client", sizeof(struct LocalUser), LCLIENT_HEAP_SIZE);
95 eventAdd("check_pings", check_pings, NULL, 5);
96 }
97
98 /*
99 * make_client - create a new Client struct and set it to initial state.
100 *
101 * from == NULL, create local client (a client connected
102 * to a socket).
103 * WARNING: This leaves the client in a dangerous
104 * state where fd == -1, dead flag is not set and
105 * the client is on the unknown_list; therefore,
106 * the first thing to do after calling make_client(NULL)
107 * is setting fd to something reasonable. -adx
108 *
109 * from, create remote client (behind a socket
110 * associated with the client defined by
111 * 'from'). ('from' is a local client!!).
112 */
113 struct Client *
114 make_client(struct Client *from)
115 {
116 struct Client *client_p = BlockHeapAlloc(client_heap);
117
118 if (from == NULL)
119 {
120 client_p->from = client_p; /* 'from' of local client is self! */
121 client_p->since = client_p->lasttime = client_p->firsttime = CurrentTime;
122
123 client_p->localClient = BlockHeapAlloc(lclient_heap);
124 client_p->localClient->registration = REG_INIT;
125 /* as good a place as any... */
126 dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list);
127 }
128 else
129 client_p->from = from; /* 'from' of local client is self! */
130
131 client_p->hnext = client_p;
132 client_p->status = STAT_UNKNOWN;
133 strcpy(client_p->username, "unknown");
134
135 return client_p;
136 }
137
138 /*
139 * free_client
140 *
141 * inputs - pointer to client
142 * output - NONE
143 * side effects - client pointed to has its memory freed
144 */
145 static void
146 free_client(struct Client *client_p)
147 {
148 assert(client_p != NULL);
149 assert(client_p != &me);
150 assert(client_p->hnext == client_p);
151 assert(client_p->channel.head == NULL);
152 assert(dlink_list_length(&client_p->channel) == 0);
153
154 MyFree(client_p->away);
155 MyFree(client_p->serv);
156
157 if (MyConnect(client_p))
158 {
159 assert(client_p->localClient->invited.head == NULL);
160 assert(dlink_list_length(&client_p->localClient->invited) == 0);
161 assert(IsClosing(client_p) && IsDead(client_p));
162
163 MyFree(client_p->localClient->response);
164 MyFree(client_p->localClient->auth_oper);
165
166 /*
167 * clean up extra sockets from P-lines which have been discarded.
168 */
169 if (client_p->localClient->listener)
170 {
171 assert(0 < client_p->localClient->listener->ref_count);
172 if (0 == --client_p->localClient->listener->ref_count &&
173 !client_p->localClient->listener->active)
174 free_listener(client_p->localClient->listener);
175 }
176
177 dbuf_clear(&client_p->localClient->buf_recvq);
178 dbuf_clear(&client_p->localClient->buf_sendq);
179
180 BlockHeapFree(lclient_heap, client_p->localClient);
181 }
182
183 BlockHeapFree(client_heap, client_p);
184 }
185
186 /*
187 * check_pings - go through the local client list and check activity
188 * kill off stuff that should die
189 *
190 * inputs - NOT USED (from event)
191 * output - next time_t when check_pings() should be called again
192 * side effects -
193 *
194 *
195 * A PING can be sent to clients as necessary.
196 *
197 * Client/Server ping outs are handled.
198 */
199
200 /*
201 * Addon from adrian. We used to call this after nextping seconds,
202 * however I've changed it to run once a second. This is only for
203 * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
204 * run once a second makes life a lot easier - when a new client connects
205 * and they need a ping in 4 seconds, if nextping was set to 20 seconds
206 * we end up waiting 20 seconds. This is stupid. :-)
207 * I will optimise (hah!) check_pings() once I've finished working on
208 * tidying up other network IO evilnesses.
209 * -- adrian
210 */
211
212 static void
213 check_pings(void *notused)
214 {
215 check_pings_list(&local_client_list);
216 check_pings_list(&serv_list);
217 check_unknowns_list();
218 }
219
220 /* check_pings_list()
221 *
222 * inputs - pointer to list to check
223 * output - NONE
224 * side effects -
225 */
226 static void
227 check_pings_list(dlink_list *list)
228 {
229 char scratch[32]; /* way too generous but... */
230 struct Client *client_p; /* current local client_p being examined */
231 int ping, pingwarn; /* ping time value from client */
232 dlink_node *ptr, *next_ptr;
233
234 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
235 {
236 client_p = ptr->data;
237
238 /*
239 ** Note: No need to notify opers here. It's
240 ** already done when "FLAGS_DEADSOCKET" is set.
241 */
242 if (IsDead(client_p))
243 {
244 /* Ignore it, its been exited already */
245 continue;
246 }
247
248 if (client_p->localClient->reject_delay > 0)
249 {
250 if (client_p->localClient->reject_delay <= CurrentTime)
251 exit_client(client_p, &me, "Rejected");
252 continue;
253 }
254
255 if (!IsRegistered(client_p))
256 ping = CONNECTTIMEOUT, pingwarn = 0;
257 else
258 ping = get_client_ping(client_p, &pingwarn);
259
260 if (ping < CurrentTime - client_p->lasttime)
261 {
262 if (!IsPingSent(client_p))
263 {
264 /*
265 * if we havent PINGed the connection and we havent
266 * heard from it in a while, PING it to make sure
267 * it is still alive.
268 */
269 SetPingSent(client_p);
270 ClearPingWarning(client_p);
271 client_p->lasttime = CurrentTime - ping;
272 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
273 }
274 else
275 {
276 if (CurrentTime - client_p->lasttime >= 2 * ping)
277 {
278 /*
279 * If the client/server hasn't talked to us in 2*ping seconds
280 * and it has a ping time, then close its connection.
281 */
282 if (IsServer(client_p) || IsHandshake(client_p))
283 {
284 sendto_realops_flags(UMODE_ALL, L_ADMIN,
285 "No response from %s, closing link",
286 get_client_name(client_p, HIDE_IP));
287 sendto_realops_flags(UMODE_ALL, L_OPER,
288 "No response from %s, closing link",
289 get_client_name(client_p, MASK_IP));
290 ilog(L_NOTICE, "No response from %s, closing link",
291 get_client_name(client_p, HIDE_IP));
292 }
293
294 snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds",
295 (int)(CurrentTime - client_p->lasttime));
296 exit_client(client_p, &me, scratch);
297 }
298 else if (!IsPingWarning(client_p) && pingwarn > 0 &&
299 (IsServer(client_p) || IsHandshake(client_p)) &&
300 CurrentTime - client_p->lasttime >= ping + pingwarn)
301 {
302 /*
303 * If the server hasn't replied in pingwarn seconds after sending
304 * the PING, notify the opers so that they are aware of the problem.
305 */
306 SetPingWarning(client_p);
307 sendto_realops_flags(UMODE_ALL, L_ADMIN,
308 "Warning, no response from %s in %d seconds",
309 get_client_name(client_p, HIDE_IP), pingwarn);
310 sendto_realops_flags(UMODE_ALL, L_OPER,
311 "Warning, no response from %s in %d seconds",
312 get_client_name(client_p, MASK_IP), pingwarn);
313 ilog(L_NOTICE, "No response from %s in %d seconds",
314 get_client_name(client_p, HIDE_IP), pingwarn);
315 }
316 }
317 }
318 }
319 }
320
321 /* check_unknowns_list()
322 *
323 * inputs - pointer to list of unknown clients
324 * output - NONE
325 * side effects - unknown clients get marked for termination after n seconds
326 */
327 static void
328 check_unknowns_list(void)
329 {
330 dlink_node *ptr, *next_ptr;
331
332 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
333 {
334 struct Client *client_p = ptr->data;
335
336 if (client_p->localClient->reject_delay > 0)
337 {
338 if (client_p->localClient->reject_delay <= CurrentTime)
339 exit_client(client_p, &me, "Rejected");
340 continue;
341 }
342
343 /*
344 * Check UNKNOWN connections - if they have been in this state
345 * for > 30s, close them.
346 */
347 if (IsAuthFinished(client_p) && (CurrentTime - client_p->firsttime) > 30)
348 exit_client(client_p, &me, "Registration timed out");
349 }
350 }
351
352 /* check_conf_klines()
353 *
354 * inputs - NONE
355 * output - NONE
356 * side effects - Check all connections for a pending kline against the
357 * client, exit the client if a kline matches.
358 */
359 void
360 check_conf_klines(void)
361 {
362 struct Client *client_p = NULL; /* current local client_p being examined */
363 struct AccessItem *aconf = NULL;
364 struct ConfItem *conf = NULL;
365 dlink_node *ptr, *next_ptr;
366
367 DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
368 {
369 client_p = ptr->data;
370
371 /* If a client is already being exited
372 */
373 if (IsDead(client_p) || !IsClient(client_p))
374 continue;
375
376 /* if there is a returned struct ConfItem then kill it */
377 if ((aconf = find_dline_conf(&client_p->localClient->ip,
378 client_p->localClient->aftype)) != NULL)
379 {
380 if (aconf->status & CONF_EXEMPTDLINE)
381 continue;
382
383 conf = unmap_conf_item(aconf);
384 ban_them(client_p, conf);
385 continue; /* and go examine next fd/client_p */
386 }
387
388 if (ConfigFileEntry.glines && (aconf = find_gline(client_p)))
389 {
390 if (IsExemptKline(client_p) ||
391 IsExemptGline(client_p))
392 {
393 sendto_realops_flags(UMODE_ALL, L_ALL,
394 "GLINE over-ruled for %s, client is %sline_exempt",
395 get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
396 continue;
397 }
398
399 conf = unmap_conf_item(aconf);
400 ban_them(client_p, conf);
401 /* and go examine next fd/client_p */
402 continue;
403 }
404
405 if ((aconf = find_kill(client_p)) != NULL)
406 {
407
408 /* if there is a returned struct AccessItem.. then kill it */
409 if (IsExemptKline(client_p))
410 {
411 sendto_realops_flags(UMODE_ALL, L_ALL,
412 "KLINE over-ruled for %s, client is kline_exempt",
413 get_client_name(client_p, HIDE_IP));
414 continue;
415 }
416
417 conf = unmap_conf_item(aconf);
418 ban_them(client_p, conf);
419 continue;
420 }
421
422 /* if there is a returned struct MatchItem then kill it */
423 if ((conf = find_matching_name_conf(XLINE_TYPE, client_p->info,
424 NULL, NULL, 0)) != NULL ||
425 (conf = find_matching_name_conf(RXLINE_TYPE, client_p->info,
426 NULL, NULL, 0)) != NULL)
427 {
428 ban_them(client_p, conf);
429 continue;
430 }
431 }
432
433 /* also check the unknowns list for new dlines */
434 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
435 {
436 client_p = ptr->data;
437
438 if ((aconf = find_dline_conf(&client_p->localClient->ip,
439 client_p->localClient->aftype)))
440 {
441 if (aconf->status & CONF_EXEMPTDLINE)
442 continue;
443
444 exit_client(client_p, &me, "D-lined");
445 }
446 }
447 }
448
449 /*
450 * ban_them
451 *
452 * inputs - pointer to client to ban
453 * - pointer to ConfItem
454 * output - NONE
455 * side effects - given client_p is banned
456 */
457 static void
458 ban_them(struct Client *client_p, struct ConfItem *conf)
459 {
460 const char *user_reason = NULL; /* What is sent to user */
461 const char *channel_reason = NULL; /* What is sent to channel */
462 struct AccessItem *aconf = NULL;
463 struct MatchItem *xconf = NULL;
464 const char *type_string = NULL;
465 const char dline_string[] = "D-line";
466 const char kline_string[] = "K-line";
467 const char gline_string[] = "G-line";
468 const char xline_string[] = "X-line";
469
470 switch (conf->type)
471 {
472 case RKLINE_TYPE:
473 case KLINE_TYPE:
474 type_string = kline_string;
475 aconf = map_to_conf(conf);
476 break;
477 case DLINE_TYPE:
478 type_string = dline_string;
479 aconf = map_to_conf(conf);
480 break;
481 case GLINE_TYPE:
482 type_string = gline_string;
483 aconf = map_to_conf(conf);
484 break;
485 case RXLINE_TYPE:
486 case XLINE_TYPE:
487 type_string = xline_string;
488 xconf = map_to_conf(conf);
489 ++xconf->count;
490 break;
491 default:
492 assert(0);
493 break;
494 }
495
496 if (ConfigFileEntry.kline_with_reason)
497 {
498 if (aconf != NULL)
499 user_reason = aconf->reason ? aconf->reason : type_string;
500 if (xconf != NULL)
501 user_reason = xconf->reason ? xconf->reason : type_string;
502 }
503 else
504 user_reason = type_string;
505
506 if (ConfigFileEntry.kline_reason != NULL)
507 channel_reason = ConfigFileEntry.kline_reason;
508 else
509 channel_reason = user_reason;
510
511 sendto_realops_flags(UMODE_ALL, L_ALL, "%s active for %s",
512 type_string, get_client_name(client_p, HIDE_IP));
513
514 if (IsClient(client_p))
515 sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
516 me.name, client_p->name, user_reason);
517
518 exit_client(client_p, &me, channel_reason);
519 }
520
521 /* update_client_exit_stats()
522 *
523 * input - pointer to client
524 * output - NONE
525 * side effects -
526 */
527 static void
528 update_client_exit_stats(struct Client *client_p)
529 {
530 if (IsClient(client_p))
531 {
532 assert(Count.total > 0);
533 --Count.total;
534 if (IsOper(client_p))
535 --Count.oper;
536 if (IsInvisible(client_p))
537 --Count.invisi;
538 }
539 else if (IsServer(client_p))
540 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, "Server %s split from %s",
541 client_p->name, client_p->servptr->name);
542
543 if (splitchecking && !splitmode)
544 check_splitmode(NULL);
545 }
546
547 /* find_person()
548 *
549 * inputs - pointer to name
550 * output - return client pointer
551 * side effects - find person by (nick)name
552 */
553 /* XXX - ugly wrapper */
554 struct Client *
555 find_person(const struct Client *client_p, const char *name)
556 {
557 struct Client *c2ptr;
558
559 if (IsDigit(*name))
560 {
561 if ((c2ptr = hash_find_id(name)) != NULL)
562 {
563 /* invisible users shall not be found by UID guessing */
564 if (IsInvisible(c2ptr) && !IsServer(client_p))
565 c2ptr = NULL;
566 }
567 }
568 else
569 c2ptr = hash_find_client(name);
570
571 return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL);
572 }
573
574 /*
575 * find_chasing - find the client structure for a nick name (user)
576 * using history mechanism if necessary. If the client is not found,
577 * an error message (NO SUCH NICK) is generated. If the client was found
578 * through the history, chasing will be 1 and otherwise 0.
579 */
580 struct Client *
581 find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing)
582 {
583 struct Client *who = find_person(client_p, user);
584
585 if (chasing)
586 *chasing = 0;
587
588 if (who)
589 return who;
590
591 if (IsDigit(*user))
592 return NULL;
593
594 if ((who = get_history(user,
595 (time_t)ConfigFileEntry.kill_chase_time_limit))
596 == NULL)
597 {
598 sendto_one(source_p, form_str(ERR_NOSUCHNICK),
599 me.name, source_p->name, user);
600 return NULL;
601 }
602
603 if (chasing)
604 *chasing = 1;
605
606 return who;
607 }
608
609 /*
610 * get_client_name - Return the name of the client
611 * for various tracking and
612 * admin purposes. The main purpose of this function is to
613 * return the "socket host" name of the client, if that
614 * differs from the advertised name (other than case).
615 * But, this can be used to any client structure.
616 *
617 * NOTE 1:
618 * Watch out the allocation of "nbuf", if either source_p->name
619 * or source_p->sockhost gets changed into pointers instead of
620 * directly allocated within the structure...
621 *
622 * NOTE 2:
623 * Function return either a pointer to the structure (source_p) or
624 * to internal buffer (nbuf). *NEVER* use the returned pointer
625 * to modify what it points!!!
626 */
627 const char *
628 get_client_name(const struct Client *client, int showip)
629 {
630 static char nbuf[HOSTLEN * 2 + USERLEN + 5];
631
632 assert(client != NULL);
633
634 if (irccmp(client->name, client->host) == 0)
635 return client->name;
636
637 if (ConfigServerHide.hide_server_ips)
638 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
639 showip = MASK_IP;
640
641 if (ConfigFileEntry.hide_spoof_ips)
642 if (showip == SHOW_IP && IsIPSpoof(client))
643 showip = MASK_IP;
644
645 /* And finally, let's get the host information, ip or name */
646 switch (showip)
647 {
648 case SHOW_IP:
649 if (MyConnect(client))
650 {
651 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
652 client->name,
653 client->username, client->sockhost);
654 break;
655 }
656 case MASK_IP:
657 snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
658 client->name, client->username);
659 break;
660 default:
661 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
662 client->name,
663 client->username, client->host);
664 }
665
666 return nbuf;
667 }
668
669 void
670 free_exited_clients(void)
671 {
672 dlink_node *ptr = NULL, *next = NULL;
673
674 DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
675 {
676 free_client(ptr->data);
677 dlinkDelete(ptr, &dead_list);
678 free_dlink_node(ptr);
679 }
680 }
681
682 /*
683 * Exit one client, local or remote. Assuming all dependents have
684 * been already removed, and socket closed for local client.
685 *
686 * The only messages generated are QUITs on channels.
687 */
688 static void
689 exit_one_client(struct Client *source_p, const char *quitmsg)
690 {
691 dlink_node *lp = NULL, *next_lp = NULL;
692
693 assert(!IsMe(source_p));
694
695 if (IsClient(source_p))
696 {
697 if (source_p->servptr->serv != NULL)
698 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
699
700 /*
701 * If a person is on a channel, send a QUIT notice
702 * to every client (person) on the same channel (so
703 * that the client can show the "**signoff" message).
704 * (Note: The notice is to the local clients *only*)
705 */
706 sendto_common_channels_local(source_p, 0, ":%s!%s@%s QUIT :%s",
707 source_p->name, source_p->username,
708 source_p->host, quitmsg);
709 DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
710 remove_user_from_channel(lp->data);
711
712 add_history(source_p, 0);
713 off_history(source_p);
714
715 watch_check_hash(source_p, RPL_LOGOFF);
716
717 if (MyConnect(source_p))
718 {
719 /* Clean up invitefield */
720 DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
721 del_invite(lp->data, source_p);
722
723 del_all_accepts(source_p);
724 }
725 }
726 else if (IsServer(source_p))
727 {
728 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
729
730 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
731 free_dlink_node(lp);
732 }
733
734 /* Remove source_p from the client lists */
735 if (HasID(source_p))
736 hash_del_id(source_p);
737 if (source_p->name[0])
738 hash_del_client(source_p);
739
740 if (IsUserHostIp(source_p))
741 delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
742
743 /* remove from global client list
744 * NOTE: source_p->node.next cannot be NULL if the client is added
745 * to global_client_list (there is always &me at its end)
746 */
747 if (source_p != NULL && source_p->node.next != NULL)
748 dlinkDelete(&source_p->node, &global_client_list);
749
750 update_client_exit_stats(source_p);
751
752 /* Check to see if the client isn't already on the dead list */
753 assert(dlinkFind(&dead_list, source_p) == NULL);
754
755 /* add to dead client dlist */
756 SetDead(source_p);
757 dlinkAdd(source_p, make_dlink_node(), &dead_list);
758 }
759
760 /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
761 * and servers to those servers that need them. A server needs the client
762 * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
763 * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
764 * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
765 * on that one -orabidoo
766 *
767 * This is now called on each local server -adx
768 */
769 static void
770 recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
771 struct Client *from, struct Client *to, const char *comment,
772 const char *splitstr)
773 {
774 dlink_node *ptr, *next;
775 struct Client *target_p;
776 int hidden = match(me.name, source_p->name); /* XXX */
777
778 assert(to != source_p); /* should be already removed from serv_list */
779
780 /* If this server can handle quit storm (QS) removal
781 * of dependents, just send the SQUIT
782 *
783 * Always check *all* dependent servers if some of them are
784 * hidden behind fakename. If so, send out the QUITs -adx
785 */
786 if (hidden || !IsCapable(to, CAP_QS))
787 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
788 {
789 target_p = ptr->data;
790 sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
791 }
792
793 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
794 recurse_send_quits(original_source_p, ptr->data, from, to,
795 comment, splitstr);
796
797 if (!hidden && ((source_p == original_source_p && to != from) ||
798 !IsCapable(to, CAP_QS)))
799 {
800 /* don't use a prefix here - we have to be 100% sure the message
801 * will be accepted without Unknown prefix etc.. */
802 sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
803 }
804 }
805
806 /*
807 * Remove all clients that depend on source_p; assumes all (S)QUITs have
808 * already been sent. we make sure to exit a server's dependent clients
809 * and servers before the server itself; exit_one_client takes care of
810 * actually removing things off llists. tweaked from +CSr31 -orabidoo
811 */
812 static void
813 recurse_remove_clients(struct Client *source_p, const char *quitmsg)
814 {
815 dlink_node *ptr, *next;
816
817 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
818 exit_one_client(ptr->data, quitmsg);
819
820 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
821 {
822 recurse_remove_clients(ptr->data, quitmsg);
823 exit_one_client(ptr->data, quitmsg);
824 }
825 }
826
827 /*
828 ** Remove *everything* that depends on source_p, from all lists, and sending
829 ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
830 ** and its SQUITs have been sent except for the upstream one -orabidoo
831 */
832 static void
833 remove_dependents(struct Client *source_p, struct Client *from,
834 const char *comment, const char *splitstr)
835 {
836 dlink_node *ptr = NULL;
837
838 DLINK_FOREACH(ptr, serv_list.head)
839 recurse_send_quits(source_p, source_p, from, ptr->data,
840 comment, splitstr);
841
842 recurse_remove_clients(source_p, splitstr);
843 }
844
845 /*
846 * exit_client - exit a client of any type. Generally, you can use
847 * this on any struct Client, regardless of its state.
848 *
849 * Note, you shouldn't exit remote _users_ without first doing
850 * SetKilled and propagating a kill or similar message. However,
851 * it is perfectly correct to call exit_client to force a _server_
852 * quit (either local or remote one).
853 *
854 * inputs: - a client pointer that is going to be exited
855 * - for servers, the second argument is a pointer to who
856 * is firing the server. This side won't get any generated
857 * messages. NEVER NULL!
858 * output: none
859 * side effects: the client is delinked from all lists, disconnected,
860 * and the rest of IRC network is notified of the exit.
861 * Client memory is scheduled to be freed
862 */
863 void
864 exit_client(struct Client *source_p, struct Client *from, const char *comment)
865 {
866 dlink_node *m = NULL;
867
868 if (MyConnect(source_p))
869 {
870 /* DO NOT REMOVE. exit_client can be called twice after a failed
871 * read/write.
872 */
873 if (IsClosing(source_p))
874 return;
875
876 SetClosing(source_p);
877
878 if (IsIpHash(source_p))
879 remove_one_ip(&source_p->localClient->ip);
880
881 if (source_p->localClient->auth)
882 {
883 delete_auth(source_p->localClient->auth);
884 source_p->localClient->auth = NULL;
885 }
886
887 /* This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
888 * STAT_HANDSHAKE or STAT_UNKNOWN
889 * all of which are lumped together into unknown_list
890 *
891 * In all above cases IsRegistered() will not be true.
892 */
893 if (!IsRegistered(source_p))
894 {
895 assert(dlinkFind(&unknown_list, source_p));
896
897 dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
898 }
899 else if (IsClient(source_p))
900 {
901 assert(Count.local > 0);
902 Count.local--;
903
904 if (IsOper(source_p))
905 {
906 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
907 free_dlink_node(m);
908 }
909
910 assert(dlinkFind(&local_client_list, source_p));
911 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
912
913 if (source_p->localClient->list_task != NULL)
914 free_list_task(source_p->localClient->list_task, source_p);
915
916 watch_del_watch_list(source_p);
917 sendto_realops_flags(UMODE_CCONN, L_ALL, "Client exiting: %s (%s@%s) [%s] [%s]",
918 source_p->name, source_p->username, source_p->host, comment,
919 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
920 "255.255.255.255" : source_p->sockhost);
921 sendto_realops_flags(UMODE_CCONN_FULL, L_ALL, "CLIEXIT: %s %s %s %s 0 %s",
922 source_p->name,
923 source_p->username,
924 source_p->host,
925
926 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
927 "255.255.255.255" : source_p->sockhost,
928 comment);
929 }
930
931 /* As soon as a client is known to be a server of some sort
932 * it has to be put on the serv_list, or SJOIN's to this new server
933 * from the connect burst will not be seen.
934 */
935 if (IsServer(source_p) || IsConnecting(source_p) ||
936 IsHandshake(source_p))
937 {
938 if ((m = dlinkFindDelete(&serv_list, source_p)) != NULL)
939 {
940 free_dlink_node(m);
941 unset_chcap_usage_counts(source_p);
942 }
943
944 if (IsServer(source_p))
945 Count.myserver--;
946 }
947
948 log_user_exit(source_p);
949
950 if (!IsDead(source_p))
951 {
952 if (IsServer(source_p))
953 {
954 /* for them, we are exiting the network */
955 sendto_one(source_p, ":%s SQUIT %s :%s",
956 ID_or_name(from, source_p), me.name, comment);
957 }
958
959 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
960 source_p->host, comment);
961 }
962
963 /*
964 ** Currently only server connections can have
965 ** depending remote clients here, but it does no
966 ** harm to check for all local clients. In
967 ** future some other clients than servers might
968 ** have remotes too...
969 **
970 ** Close the Client connection first and mark it
971 ** so that no messages are attempted to send to it.
972 ** Remember it makes source_p->from == NULL.
973 */
974 close_connection(source_p);
975 }
976
977 if (IsServer(source_p))
978 {
979 char splitstr[HOSTLEN + HOSTLEN + 2];
980
981 /* This shouldn't ever happen */
982 assert(source_p->serv != NULL && source_p->servptr != NULL);
983
984 if (ConfigServerHide.hide_servers)
985 /*
986 * Set netsplit message to "*.net *.split" to still show
987 * that its a split, but hide the servers splitting
988 */
989 strcpy(splitstr, "*.net *.split");
990 else
991 snprintf(splitstr, sizeof(splitstr), "%s %s",
992 source_p->servptr->name, source_p->name);
993
994 remove_dependents(source_p, from->from, comment, splitstr);
995
996 if (source_p->servptr == &me)
997 {
998 sendto_realops_flags(UMODE_ALL, L_ALL,
999 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1000 source_p->name, (int)(CurrentTime - source_p->firsttime),
1001 source_p->localClient->send.bytes >> 10,
1002 source_p->localClient->recv.bytes >> 10);
1003 ilog(L_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1004 source_p->name, (int)(CurrentTime - source_p->firsttime),
1005 source_p->localClient->send.bytes >> 10,
1006 source_p->localClient->recv.bytes >> 10);
1007 }
1008 }
1009 else if (IsClient(source_p) && !IsKilled(source_p))
1010 {
1011 sendto_server(from->from, NULL, CAP_TS6, NOCAPS,
1012 ":%s QUIT :%s", ID(source_p), comment);
1013 sendto_server(from->from, NULL, NOCAPS, CAP_TS6,
1014 ":%s QUIT :%s", source_p->name, comment);
1015 }
1016
1017 /* The client *better* be off all of the lists */
1018 assert(dlinkFind(&unknown_list, source_p) == NULL);
1019 assert(dlinkFind(&local_client_list, source_p) == NULL);
1020 assert(dlinkFind(&serv_list, source_p) == NULL);
1021 assert(dlinkFind(&oper_list, source_p) == NULL);
1022
1023 exit_one_client(source_p, comment);
1024 }
1025
1026 /*
1027 * dead_link_on_write - report a write error if not already dead,
1028 * mark it as dead then exit it
1029 */
1030 void
1031 dead_link_on_write(struct Client *client_p, int ierrno)
1032 {
1033 dlink_node *ptr;
1034
1035 if (IsDefunct(client_p))
1036 return;
1037
1038 dbuf_clear(&client_p->localClient->buf_recvq);
1039 dbuf_clear(&client_p->localClient->buf_sendq);
1040
1041 assert(dlinkFind(&abort_list, client_p) == NULL);
1042 ptr = make_dlink_node();
1043 /* don't let exit_aborted_clients() finish yet */
1044 dlinkAddTail(client_p, ptr, &abort_list);
1045
1046 if (eac_next == NULL)
1047 eac_next = ptr;
1048
1049 SetDead(client_p); /* You are dead my friend */
1050 }
1051
1052 /*
1053 * dead_link_on_read - report a read error if not already dead,
1054 * mark it as dead then exit it
1055 */
1056 void
1057 dead_link_on_read(struct Client *client_p, int error)
1058 {
1059 char errmsg[255];
1060 int current_error;
1061
1062 if (IsDefunct(client_p))
1063 return;
1064
1065 dbuf_clear(&client_p->localClient->buf_recvq);
1066 dbuf_clear(&client_p->localClient->buf_sendq);
1067
1068 current_error = get_sockerr(client_p->localClient->fd.fd);
1069
1070 if (IsServer(client_p) || IsHandshake(client_p))
1071 {
1072 int connected = CurrentTime - client_p->firsttime;
1073
1074 if (error == 0)
1075 {
1076 /* Admins get the real IP */
1077 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1078 "Server %s closed the connection",
1079 get_client_name(client_p, SHOW_IP));
1080
1081 /* Opers get a masked IP */
1082 sendto_realops_flags(UMODE_ALL, L_OPER,
1083 "Server %s closed the connection",
1084 get_client_name(client_p, MASK_IP));
1085
1086 ilog(L_NOTICE, "Server %s closed the connection",
1087 get_client_name(client_p, SHOW_IP));
1088 }
1089 else
1090 {
1091 report_error(L_ADMIN, "Lost connection to %s: %s",
1092 get_client_name(client_p, SHOW_IP), current_error);
1093 report_error(L_OPER, "Lost connection to %s: %s",
1094 get_client_name(client_p, MASK_IP), current_error);
1095 }
1096
1097 sendto_realops_flags(UMODE_ALL, L_ALL,
1098 "%s had been connected for %d day%s, %2d:%02d:%02d",
1099 client_p->name, connected/86400,
1100 (connected/86400 == 1) ? "" : "s",
1101 (connected % 86400) / 3600, (connected % 3600) / 60,
1102 connected % 60);
1103 }
1104
1105 if (error == 0)
1106 strlcpy(errmsg, "Remote host closed the connection",
1107 sizeof(errmsg));
1108 else
1109 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
1110 strerror(current_error));
1111
1112 exit_client(client_p, &me, errmsg);
1113 }
1114
1115 void
1116 exit_aborted_clients(void)
1117 {
1118 dlink_node *ptr;
1119 struct Client *target_p;
1120 const char *notice;
1121
1122 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1123 {
1124 target_p = ptr->data;
1125 eac_next = ptr->next;
1126
1127 if (target_p == NULL)
1128 {
1129 sendto_realops_flags(UMODE_ALL, L_ALL,
1130 "Warning: null client on abort_list!");
1131 dlinkDelete(ptr, &abort_list);
1132 free_dlink_node(ptr);
1133 continue;
1134 }
1135
1136 dlinkDelete(ptr, &abort_list);
1137
1138 if (IsSendQExceeded(target_p))
1139 notice = "Max SendQ exceeded";
1140 else
1141 notice = "Write error: connection closed";
1142
1143 exit_client(target_p, &me, notice);
1144 free_dlink_node(ptr);
1145 }
1146 }
1147
1148 /*
1149 * accept processing, this adds a form of "caller ID" to ircd
1150 *
1151 * If a client puts themselves into "caller ID only" mode,
1152 * only clients that match a client pointer they have put on
1153 * the accept list will be allowed to message them.
1154 *
1155 * Diane Bruce, "Dianora" db@db.net
1156 */
1157
1158 void
1159 del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
1160 {
1161 dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist);
1162
1163 MyFree(accept_p->nickptr);
1164 MyFree(accept_p->userptr);
1165 MyFree(accept_p->hostptr);
1166 MyFree(accept_p);
1167 }
1168
1169 struct split_nuh_item *
1170 find_accept(const char *nick, const char *user,
1171 const char *host, struct Client *client_p, int do_match)
1172 {
1173 dlink_node *ptr = NULL;
1174 /* XXX We wouldn't need that if match() would return 0 on match */
1175 int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1176
1177 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1178 {
1179 struct split_nuh_item *accept_p = ptr->data;
1180
1181 if (cmpfunc(accept_p->nickptr, nick) == do_match &&
1182 cmpfunc(accept_p->userptr, user) == do_match &&
1183 cmpfunc(accept_p->hostptr, host) == do_match)
1184 return accept_p;
1185 }
1186
1187 return NULL;
1188 }
1189
1190 /* accept_message()
1191 *
1192 * inputs - pointer to source client
1193 * - pointer to target client
1194 * output - 1 if accept this message 0 if not
1195 * side effects - See if source is on target's allow list
1196 */
1197 int
1198 accept_message(struct Client *source,
1199 struct Client *target)
1200 {
1201 dlink_node *ptr = NULL;
1202
1203 if (source == target || find_accept(source->name, source->username,
1204 source->host, target, 1))
1205 return 1;
1206
1207 if (IsSoftCallerId(target))
1208 DLINK_FOREACH(ptr, target->channel.head)
1209 if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1210 return 1;
1211
1212 return 0;
1213 }
1214
1215 /* del_all_accepts()
1216 *
1217 * inputs - pointer to exiting client
1218 * output - NONE
1219 * side effects - Walk through given clients acceptlist and remove all entries
1220 */
1221 void
1222 del_all_accepts(struct Client *client_p)
1223 {
1224 dlink_node *ptr = NULL, *next_ptr = NULL;
1225
1226 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1227 del_accept(ptr->data, client_p);
1228 }
1229
1230 /* change_local_nick()
1231 *
1232 * inputs - pointer to server
1233 * - pointer to client
1234 * - nick
1235 * output -
1236 * side effects - changes nick of a LOCAL user
1237 */
1238 void
1239 change_local_nick(struct Client *client_p, struct Client *source_p, const char *nick)
1240 {
1241 int samenick = 0;
1242
1243 assert(source_p->name[0] && !EmptyString(nick));
1244
1245 /*
1246 * Client just changing his/her nick. If he/she is
1247 * on a channel, send note of change to all clients
1248 * on that channel. Propagate notice to other servers.
1249 */
1250 if ((source_p->localClient->last_nick_change +
1251 ConfigFileEntry.max_nick_time) < CurrentTime)
1252 source_p->localClient->number_of_nick_changes = 0;
1253 source_p->localClient->last_nick_change = CurrentTime;
1254 source_p->localClient->number_of_nick_changes++;
1255
1256 if ((ConfigFileEntry.anti_nick_flood &&
1257 (source_p->localClient->number_of_nick_changes
1258 <= ConfigFileEntry.max_nick_changes)) ||
1259 !ConfigFileEntry.anti_nick_flood ||
1260 (IsOper(source_p) && ConfigFileEntry.no_oper_flood))
1261 {
1262 samenick = !irccmp(source_p->name, nick);
1263
1264 if (!samenick)
1265 {
1266 source_p->tsinfo = CurrentTime;
1267 clear_ban_cache_client(source_p);
1268 watch_check_hash(source_p, RPL_LOGOFF);
1269
1270 if (HasUMode(source_p, UMODE_REGISTERED))
1271 {
1272 unsigned int oldmodes = source_p->umodes;
1273 char modebuf[IRCD_BUFSIZE] = { '\0' };
1274
1275 DelUMode(source_p, UMODE_REGISTERED);
1276 send_umode(source_p, source_p, oldmodes, 0xffffffff, modebuf);
1277 }
1278 }
1279
1280 /* XXX - the format of this notice should eventually be changed
1281 * to either %s[%s@%s], or even better would be get_client_name() -bill
1282 */
1283 sendto_realops_flags(UMODE_NCHANGE, L_ALL, "Nick change: From %s to %s [%s@%s]",
1284 source_p->name, nick, source_p->username, source_p->host);
1285 sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s",
1286 source_p->name, source_p->username,
1287 source_p->host, nick);
1288 add_history(source_p, 1);
1289
1290 sendto_server(client_p, NULL, CAP_TS6, NOCAPS,
1291 ":%s NICK %s :%lu",
1292 ID(source_p), nick, (unsigned long)source_p->tsinfo);
1293 sendto_server(client_p, NULL, NOCAPS, CAP_TS6,
1294 ":%s NICK %s :%lu",
1295 source_p->name, nick, (unsigned long)source_p->tsinfo);
1296
1297 hash_del_client(source_p);
1298 strcpy(source_p->name, nick);
1299 hash_add_client(source_p);
1300
1301 if (!samenick)
1302 watch_check_hash(source_p, RPL_LOGON);
1303
1304 /* fd_desc is long enough */
1305 fd_note(&client_p->localClient->fd, "Nick: %s", nick);
1306 }
1307 else
1308 sendto_one(source_p, form_str(ERR_NICKTOOFAST),
1309 me.name, source_p->name, source_p->name,
1310 nick, ConfigFileEntry.max_nick_time);
1311 }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision