ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid-8/src/client.c
Revision: 1158
Committed: Wed Aug 10 19:46:00 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
File size: 39834 byte(s)
Log Message:
- UMODE_REJ goes to usermode 'j'
- add UMODE_REGISTERED ('r') (registered nickname)

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 (GlobalSetOptions.idletime && IsClient(client_p))
256 {
257 if (!IsExemptKline(client_p) && !IsOper(client_p) &&
258 !IsIdlelined(client_p) &&
259 ((CurrentTime - client_p->localClient->last) > GlobalSetOptions.idletime))
260 {
261 struct ConfItem *conf;
262 struct AccessItem *aconf;
263
264 conf = make_conf_item(KLINE_TYPE);
265 aconf = map_to_conf(conf);
266
267 DupString(aconf->host, client_p->host);
268 DupString(aconf->reason, "idle exceeder");
269 DupString(aconf->user, client_p->username);
270 aconf->hold = CurrentTime + 60;
271 add_temp_line(conf);
272
273 sendto_realops_flags(UMODE_ALL, L_ALL,
274 "Idle time limit exceeded for %s - temp k-lining",
275 get_client_name(client_p, HIDE_IP));
276 exit_client(client_p, &me, aconf->reason);
277 continue;
278 }
279 }
280
281 if (!IsRegistered(client_p))
282 ping = CONNECTTIMEOUT, pingwarn = 0;
283 else
284 ping = get_client_ping(client_p, &pingwarn);
285
286 if (ping < CurrentTime - client_p->lasttime)
287 {
288 if (!IsPingSent(client_p))
289 {
290 /*
291 * if we havent PINGed the connection and we havent
292 * heard from it in a while, PING it to make sure
293 * it is still alive.
294 */
295 SetPingSent(client_p);
296 ClearPingWarning(client_p);
297 client_p->lasttime = CurrentTime - ping;
298 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
299 }
300 else
301 {
302 if (CurrentTime - client_p->lasttime >= 2 * ping)
303 {
304 /*
305 * If the client/server hasn't talked to us in 2*ping seconds
306 * and it has a ping time, then close its connection.
307 */
308 if (IsServer(client_p) || IsHandshake(client_p))
309 {
310 sendto_realops_flags(UMODE_ALL, L_ADMIN,
311 "No response from %s, closing link",
312 get_client_name(client_p, HIDE_IP));
313 sendto_realops_flags(UMODE_ALL, L_OPER,
314 "No response from %s, closing link",
315 get_client_name(client_p, MASK_IP));
316 ilog(L_NOTICE, "No response from %s, closing link",
317 get_client_name(client_p, HIDE_IP));
318 }
319
320 snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds",
321 (int)(CurrentTime - client_p->lasttime));
322 exit_client(client_p, &me, scratch);
323 }
324 else if (!IsPingWarning(client_p) && pingwarn > 0 &&
325 (IsServer(client_p) || IsHandshake(client_p)) &&
326 CurrentTime - client_p->lasttime >= ping + pingwarn)
327 {
328 /*
329 * If the server hasn't replied in pingwarn seconds after sending
330 * the PING, notify the opers so that they are aware of the problem.
331 */
332 SetPingWarning(client_p);
333 sendto_realops_flags(UMODE_ALL, L_ADMIN,
334 "Warning, no response from %s in %d seconds",
335 get_client_name(client_p, HIDE_IP), pingwarn);
336 sendto_realops_flags(UMODE_ALL, L_OPER,
337 "Warning, no response from %s in %d seconds",
338 get_client_name(client_p, MASK_IP), pingwarn);
339 ilog(L_NOTICE, "No response from %s in %d seconds",
340 get_client_name(client_p, HIDE_IP), pingwarn);
341 }
342 }
343 }
344 }
345 }
346
347 /* check_unknowns_list()
348 *
349 * inputs - pointer to list of unknown clients
350 * output - NONE
351 * side effects - unknown clients get marked for termination after n seconds
352 */
353 static void
354 check_unknowns_list(void)
355 {
356 dlink_node *ptr, *next_ptr;
357
358 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
359 {
360 struct Client *client_p = ptr->data;
361
362 if (client_p->localClient->reject_delay > 0)
363 {
364 if (client_p->localClient->reject_delay <= CurrentTime)
365 exit_client(client_p, &me, "Rejected");
366 continue;
367 }
368
369 /*
370 * Check UNKNOWN connections - if they have been in this state
371 * for > 30s, close them.
372 */
373 if (IsAuthFinished(client_p) && (CurrentTime - client_p->firsttime) > 30)
374 exit_client(client_p, &me, "Registration timed out");
375 }
376 }
377
378 /* check_conf_klines()
379 *
380 * inputs - NONE
381 * output - NONE
382 * side effects - Check all connections for a pending kline against the
383 * client, exit the client if a kline matches.
384 */
385 void
386 check_conf_klines(void)
387 {
388 struct Client *client_p = NULL; /* current local client_p being examined */
389 struct AccessItem *aconf = NULL;
390 struct ConfItem *conf = NULL;
391 dlink_node *ptr, *next_ptr;
392
393 DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
394 {
395 client_p = ptr->data;
396
397 /* If a client is already being exited
398 */
399 if (IsDead(client_p) || !IsClient(client_p))
400 continue;
401
402 /* if there is a returned struct ConfItem then kill it */
403 if ((aconf = find_dline_conf(&client_p->localClient->ip,
404 client_p->localClient->aftype)) != NULL)
405 {
406 if (aconf->status & CONF_EXEMPTDLINE)
407 continue;
408
409 conf = unmap_conf_item(aconf);
410 ban_them(client_p, conf);
411 continue; /* and go examine next fd/client_p */
412 }
413
414 if (ConfigFileEntry.glines && (aconf = find_gline(client_p)))
415 {
416 if (IsExemptKline(client_p) ||
417 IsExemptGline(client_p))
418 {
419 sendto_realops_flags(UMODE_ALL, L_ALL,
420 "GLINE over-ruled for %s, client is %sline_exempt",
421 get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
422 continue;
423 }
424
425 conf = unmap_conf_item(aconf);
426 ban_them(client_p, conf);
427 /* and go examine next fd/client_p */
428 continue;
429 }
430
431 if ((aconf = find_kill(client_p)) != NULL)
432 {
433
434 /* if there is a returned struct AccessItem.. then kill it */
435 if (IsExemptKline(client_p))
436 {
437 sendto_realops_flags(UMODE_ALL, L_ALL,
438 "KLINE over-ruled for %s, client is kline_exempt",
439 get_client_name(client_p, HIDE_IP));
440 continue;
441 }
442
443 conf = unmap_conf_item(aconf);
444 ban_them(client_p, conf);
445 continue;
446 }
447
448 /* if there is a returned struct MatchItem then kill it */
449 if ((conf = find_matching_name_conf(XLINE_TYPE, client_p->info,
450 NULL, NULL, 0)) != NULL ||
451 (conf = find_matching_name_conf(RXLINE_TYPE, client_p->info,
452 NULL, NULL, 0)) != NULL)
453 {
454 ban_them(client_p, conf);
455 continue;
456 }
457 }
458
459 /* also check the unknowns list for new dlines */
460 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
461 {
462 client_p = ptr->data;
463
464 if ((aconf = find_dline_conf(&client_p->localClient->ip,
465 client_p->localClient->aftype)))
466 {
467 if (aconf->status & CONF_EXEMPTDLINE)
468 continue;
469
470 exit_client(client_p, &me, "D-lined");
471 }
472 }
473 }
474
475 /*
476 * ban_them
477 *
478 * inputs - pointer to client to ban
479 * - pointer to ConfItem
480 * output - NONE
481 * side effects - given client_p is banned
482 */
483 static void
484 ban_them(struct Client *client_p, struct ConfItem *conf)
485 {
486 const char *user_reason = NULL; /* What is sent to user */
487 const char *channel_reason = NULL; /* What is sent to channel */
488 struct AccessItem *aconf = NULL;
489 struct MatchItem *xconf = NULL;
490 const char *type_string = NULL;
491 const char dline_string[] = "D-line";
492 const char kline_string[] = "K-line";
493 const char gline_string[] = "G-line";
494 const char xline_string[] = "X-line";
495
496 switch (conf->type)
497 {
498 case RKLINE_TYPE:
499 case KLINE_TYPE:
500 type_string = kline_string;
501 aconf = map_to_conf(conf);
502 break;
503 case DLINE_TYPE:
504 type_string = dline_string;
505 aconf = map_to_conf(conf);
506 break;
507 case GLINE_TYPE:
508 type_string = gline_string;
509 aconf = map_to_conf(conf);
510 break;
511 case RXLINE_TYPE:
512 case XLINE_TYPE:
513 type_string = xline_string;
514 xconf = map_to_conf(conf);
515 ++xconf->count;
516 break;
517 default:
518 assert(0);
519 break;
520 }
521
522 if (ConfigFileEntry.kline_with_reason)
523 {
524 if (aconf != NULL)
525 user_reason = aconf->reason ? aconf->reason : type_string;
526 if (xconf != NULL)
527 user_reason = xconf->reason ? xconf->reason : type_string;
528 }
529 else
530 user_reason = type_string;
531
532 if (ConfigFileEntry.kline_reason != NULL)
533 channel_reason = ConfigFileEntry.kline_reason;
534 else
535 channel_reason = user_reason;
536
537 sendto_realops_flags(UMODE_ALL, L_ALL, "%s active for %s",
538 type_string, get_client_name(client_p, HIDE_IP));
539
540 if (IsClient(client_p))
541 sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
542 me.name, client_p->name, user_reason);
543
544 exit_client(client_p, &me, channel_reason);
545 }
546
547 /* update_client_exit_stats()
548 *
549 * input - pointer to client
550 * output - NONE
551 * side effects -
552 */
553 static void
554 update_client_exit_stats(struct Client *client_p)
555 {
556 if (IsClient(client_p))
557 {
558 assert(Count.total > 0);
559 --Count.total;
560 if (IsOper(client_p))
561 --Count.oper;
562 if (IsInvisible(client_p))
563 --Count.invisi;
564 }
565 else if (IsServer(client_p))
566 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, "Server %s split from %s",
567 client_p->name, client_p->servptr->name);
568
569 if (splitchecking && !splitmode)
570 check_splitmode(NULL);
571 }
572
573 /* find_person()
574 *
575 * inputs - pointer to name
576 * output - return client pointer
577 * side effects - find person by (nick)name
578 */
579 /* XXX - ugly wrapper */
580 struct Client *
581 find_person(const struct Client *client_p, const char *name)
582 {
583 struct Client *c2ptr;
584
585 if (IsDigit(*name))
586 {
587 if ((c2ptr = hash_find_id(name)) != NULL)
588 {
589 /* invisible users shall not be found by UID guessing */
590 if (IsInvisible(c2ptr) && !IsServer(client_p))
591 c2ptr = NULL;
592 }
593 }
594 else
595 c2ptr = find_client(name);
596
597 return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL);
598 }
599
600 /*
601 * find_chasing - find the client structure for a nick name (user)
602 * using history mechanism if necessary. If the client is not found,
603 * an error message (NO SUCH NICK) is generated. If the client was found
604 * through the history, chasing will be 1 and otherwise 0.
605 */
606 struct Client *
607 find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing)
608 {
609 struct Client *who = find_person(client_p, user);
610
611 if (chasing)
612 *chasing = 0;
613
614 if (who)
615 return(who);
616
617 if (IsDigit(*user))
618 return(NULL);
619
620 if ((who = get_history(user,
621 (time_t)ConfigFileEntry.kill_chase_time_limit))
622 == NULL)
623 {
624 sendto_one(source_p, form_str(ERR_NOSUCHNICK),
625 me.name, source_p->name, user);
626 return(NULL);
627 }
628
629 if (chasing)
630 *chasing = 1;
631
632 return(who);
633 }
634
635 /*
636 * get_client_name - Return the name of the client
637 * for various tracking and
638 * admin purposes. The main purpose of this function is to
639 * return the "socket host" name of the client, if that
640 * differs from the advertised name (other than case).
641 * But, this can be used to any client structure.
642 *
643 * NOTE 1:
644 * Watch out the allocation of "nbuf", if either source_p->name
645 * or source_p->sockhost gets changed into pointers instead of
646 * directly allocated within the structure...
647 *
648 * NOTE 2:
649 * Function return either a pointer to the structure (source_p) or
650 * to internal buffer (nbuf). *NEVER* use the returned pointer
651 * to modify what it points!!!
652 */
653 const char *
654 get_client_name(const struct Client *client, int showip)
655 {
656 static char nbuf[HOSTLEN * 2 + USERLEN + 5];
657
658 assert(client != NULL);
659
660 if (irccmp(client->name, client->host) == 0)
661 return client->name;
662
663 if (ConfigServerHide.hide_server_ips)
664 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
665 showip = MASK_IP;
666
667 if (ConfigFileEntry.hide_spoof_ips)
668 if (showip == SHOW_IP && IsIPSpoof(client))
669 showip = MASK_IP;
670
671 /* And finally, let's get the host information, ip or name */
672 switch (showip)
673 {
674 case SHOW_IP:
675 if (MyConnect(client))
676 {
677 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
678 client->name,
679 client->username, client->sockhost);
680 break;
681 }
682 case MASK_IP:
683 snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
684 client->name, client->username);
685 break;
686 default:
687 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
688 client->name,
689 client->username, client->host);
690 }
691
692 return nbuf;
693 }
694
695 void
696 free_exited_clients(void)
697 {
698 dlink_node *ptr = NULL, *next = NULL;
699
700 DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
701 {
702 free_client(ptr->data);
703 dlinkDelete(ptr, &dead_list);
704 free_dlink_node(ptr);
705 }
706 }
707
708 /*
709 * Exit one client, local or remote. Assuming all dependents have
710 * been already removed, and socket closed for local client.
711 *
712 * The only messages generated are QUITs on channels.
713 */
714 static void
715 exit_one_client(struct Client *source_p, const char *quitmsg)
716 {
717 dlink_node *lp = NULL, *next_lp = NULL;
718
719 assert(!IsMe(source_p));
720
721 if (IsClient(source_p))
722 {
723 if (source_p->servptr->serv != NULL)
724 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
725
726 /*
727 * If a person is on a channel, send a QUIT notice
728 * to every client (person) on the same channel (so
729 * that the client can show the "**signoff" message).
730 * (Note: The notice is to the local clients *only*)
731 */
732 sendto_common_channels_local(source_p, 0, ":%s!%s@%s QUIT :%s",
733 source_p->name, source_p->username,
734 source_p->host, quitmsg);
735 DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
736 remove_user_from_channel(lp->data);
737
738 add_history(source_p, 0);
739 off_history(source_p);
740
741 watch_check_hash(source_p, RPL_LOGOFF);
742
743 if (MyConnect(source_p))
744 {
745 /* Clean up invitefield */
746 DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
747 del_invite(lp->data, source_p);
748
749 del_all_accepts(source_p);
750 }
751 }
752 else if (IsServer(source_p))
753 {
754 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
755
756 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
757 free_dlink_node(lp);
758 }
759
760 /* Remove source_p from the client lists */
761 if (HasID(source_p))
762 hash_del_id(source_p);
763 if (source_p->name[0])
764 hash_del_client(source_p);
765
766 if (IsUserHostIp(source_p))
767 delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
768
769 /* remove from global client list
770 * NOTE: source_p->node.next cannot be NULL if the client is added
771 * to global_client_list (there is always &me at its end)
772 */
773 if (source_p != NULL && source_p->node.next != NULL)
774 dlinkDelete(&source_p->node, &global_client_list);
775
776 update_client_exit_stats(source_p);
777
778 /* Check to see if the client isn't already on the dead list */
779 assert(dlinkFind(&dead_list, source_p) == NULL);
780
781 /* add to dead client dlist */
782 SetDead(source_p);
783 dlinkAdd(source_p, make_dlink_node(), &dead_list);
784 }
785
786 /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
787 * and servers to those servers that need them. A server needs the client
788 * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
789 * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
790 * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
791 * on that one -orabidoo
792 *
793 * This is now called on each local server -adx
794 */
795 static void
796 recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
797 struct Client *from, struct Client *to, const char *comment,
798 const char *splitstr)
799 {
800 dlink_node *ptr, *next;
801 struct Client *target_p;
802 int hidden = match(me.name, source_p->name); /* XXX */
803
804 assert(to != source_p); /* should be already removed from serv_list */
805
806 /* If this server can handle quit storm (QS) removal
807 * of dependents, just send the SQUIT
808 *
809 * Always check *all* dependent servers if some of them are
810 * hidden behind fakename. If so, send out the QUITs -adx
811 */
812 if (hidden || !IsCapable(to, CAP_QS))
813 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
814 {
815 target_p = ptr->data;
816 sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
817 }
818
819 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
820 recurse_send_quits(original_source_p, ptr->data, from, to,
821 comment, splitstr);
822
823 if (!hidden && ((source_p == original_source_p && to != from) ||
824 !IsCapable(to, CAP_QS)))
825 {
826 /* don't use a prefix here - we have to be 100% sure the message
827 * will be accepted without Unknown prefix etc.. */
828 sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
829 }
830 }
831
832 /*
833 * Remove all clients that depend on source_p; assumes all (S)QUITs have
834 * already been sent. we make sure to exit a server's dependent clients
835 * and servers before the server itself; exit_one_client takes care of
836 * actually removing things off llists. tweaked from +CSr31 -orabidoo
837 */
838 static void
839 recurse_remove_clients(struct Client *source_p, const char *quitmsg)
840 {
841 dlink_node *ptr, *next;
842
843 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
844 exit_one_client(ptr->data, quitmsg);
845
846 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
847 {
848 recurse_remove_clients(ptr->data, quitmsg);
849 exit_one_client(ptr->data, quitmsg);
850 }
851 }
852
853 /*
854 ** Remove *everything* that depends on source_p, from all lists, and sending
855 ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
856 ** and its SQUITs have been sent except for the upstream one -orabidoo
857 */
858 static void
859 remove_dependents(struct Client *source_p, struct Client *from,
860 const char *comment, const char *splitstr)
861 {
862 dlink_node *ptr = NULL;
863
864 DLINK_FOREACH(ptr, serv_list.head)
865 recurse_send_quits(source_p, source_p, from, ptr->data,
866 comment, splitstr);
867
868 recurse_remove_clients(source_p, splitstr);
869 }
870
871 /*
872 * exit_client - exit a client of any type. Generally, you can use
873 * this on any struct Client, regardless of its state.
874 *
875 * Note, you shouldn't exit remote _users_ without first doing
876 * SetKilled and propagating a kill or similar message. However,
877 * it is perfectly correct to call exit_client to force a _server_
878 * quit (either local or remote one).
879 *
880 * inputs: - a client pointer that is going to be exited
881 * - for servers, the second argument is a pointer to who
882 * is firing the server. This side won't get any generated
883 * messages. NEVER NULL!
884 * output: none
885 * side effects: the client is delinked from all lists, disconnected,
886 * and the rest of IRC network is notified of the exit.
887 * Client memory is scheduled to be freed
888 */
889 void
890 exit_client(struct Client *source_p, struct Client *from, const char *comment)
891 {
892 dlink_node *m = NULL;
893
894 if (MyConnect(source_p))
895 {
896 /* DO NOT REMOVE. exit_client can be called twice after a failed
897 * read/write.
898 */
899 if (IsClosing(source_p))
900 return;
901
902 SetClosing(source_p);
903
904 if (IsIpHash(source_p))
905 remove_one_ip(&source_p->localClient->ip);
906
907 if (source_p->localClient->auth)
908 {
909 delete_auth(source_p->localClient->auth);
910 source_p->localClient->auth = NULL;
911 }
912
913 /* This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
914 * STAT_HANDSHAKE or STAT_UNKNOWN
915 * all of which are lumped together into unknown_list
916 *
917 * In all above cases IsRegistered() will not be true.
918 */
919 if (!IsRegistered(source_p))
920 {
921 assert(dlinkFind(&unknown_list, source_p));
922
923 dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
924 }
925 else if (IsClient(source_p))
926 {
927 assert(Count.local > 0);
928 Count.local--;
929
930 if (IsOper(source_p))
931 {
932 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
933 free_dlink_node(m);
934 }
935
936 assert(dlinkFind(&local_client_list, source_p));
937 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
938
939 if (source_p->localClient->list_task != NULL)
940 free_list_task(source_p->localClient->list_task, source_p);
941
942 watch_del_watch_list(source_p);
943 sendto_realops_flags(UMODE_CCONN, L_ALL, "Client exiting: %s (%s@%s) [%s] [%s]",
944 source_p->name, source_p->username, source_p->host, comment,
945 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
946 "255.255.255.255" : source_p->sockhost);
947 sendto_realops_flags(UMODE_CCONN_FULL, L_ALL, "CLIEXIT: %s %s %s %s 0 %s",
948 source_p->name,
949 source_p->username,
950 source_p->host,
951
952 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
953 "255.255.255.255" : source_p->sockhost,
954 comment);
955 }
956
957 /* As soon as a client is known to be a server of some sort
958 * it has to be put on the serv_list, or SJOIN's to this new server
959 * from the connect burst will not be seen.
960 */
961 if (IsServer(source_p) || IsConnecting(source_p) ||
962 IsHandshake(source_p))
963 {
964 if ((m = dlinkFindDelete(&serv_list, source_p)) != NULL)
965 {
966 free_dlink_node(m);
967 unset_chcap_usage_counts(source_p);
968 }
969
970 if (IsServer(source_p))
971 Count.myserver--;
972 }
973
974 log_user_exit(source_p);
975
976 if (!IsDead(source_p))
977 {
978 if (IsServer(source_p))
979 {
980 /* for them, we are exiting the network */
981 sendto_one(source_p, ":%s SQUIT %s :%s",
982 ID_or_name(from, source_p), me.name, comment);
983 }
984
985 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
986 source_p->host, comment);
987 }
988
989 /*
990 ** Currently only server connections can have
991 ** depending remote clients here, but it does no
992 ** harm to check for all local clients. In
993 ** future some other clients than servers might
994 ** have remotes too...
995 **
996 ** Close the Client connection first and mark it
997 ** so that no messages are attempted to send to it.
998 ** Remember it makes source_p->from == NULL.
999 */
1000 close_connection(source_p);
1001 }
1002
1003 if (IsServer(source_p))
1004 {
1005 char splitstr[HOSTLEN + HOSTLEN + 2];
1006
1007 /* This shouldn't ever happen */
1008 assert(source_p->serv != NULL && source_p->servptr != NULL);
1009
1010 if (ConfigServerHide.hide_servers)
1011 /*
1012 * Set netsplit message to "*.net *.split" to still show
1013 * that its a split, but hide the servers splitting
1014 */
1015 strcpy(splitstr, "*.net *.split");
1016 else
1017 snprintf(splitstr, sizeof(splitstr), "%s %s",
1018 source_p->servptr->name, source_p->name);
1019
1020 remove_dependents(source_p, from->from, comment, splitstr);
1021
1022 if (source_p->servptr == &me)
1023 {
1024 sendto_realops_flags(UMODE_ALL, L_ALL,
1025 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1026 source_p->name, (int)(CurrentTime - source_p->firsttime),
1027 source_p->localClient->send.bytes >> 10,
1028 source_p->localClient->recv.bytes >> 10);
1029 ilog(L_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
1030 source_p->name, (int)(CurrentTime - source_p->firsttime),
1031 source_p->localClient->send.bytes >> 10,
1032 source_p->localClient->recv.bytes >> 10);
1033 }
1034 }
1035 else if (IsClient(source_p) && !IsKilled(source_p))
1036 {
1037 sendto_server(from->from, NULL, CAP_TS6, NOCAPS,
1038 ":%s QUIT :%s", ID(source_p), comment);
1039 sendto_server(from->from, NULL, NOCAPS, CAP_TS6,
1040 ":%s QUIT :%s", source_p->name, comment);
1041 }
1042
1043 /* The client *better* be off all of the lists */
1044 assert(dlinkFind(&unknown_list, source_p) == NULL);
1045 assert(dlinkFind(&local_client_list, source_p) == NULL);
1046 assert(dlinkFind(&serv_list, source_p) == NULL);
1047 assert(dlinkFind(&oper_list, source_p) == NULL);
1048
1049 exit_one_client(source_p, comment);
1050 }
1051
1052 /*
1053 * dead_link_on_write - report a write error if not already dead,
1054 * mark it as dead then exit it
1055 */
1056 void
1057 dead_link_on_write(struct Client *client_p, int ierrno)
1058 {
1059 dlink_node *ptr;
1060
1061 if (IsDefunct(client_p))
1062 return;
1063
1064 dbuf_clear(&client_p->localClient->buf_recvq);
1065 dbuf_clear(&client_p->localClient->buf_sendq);
1066
1067 assert(dlinkFind(&abort_list, client_p) == NULL);
1068 ptr = make_dlink_node();
1069 /* don't let exit_aborted_clients() finish yet */
1070 dlinkAddTail(client_p, ptr, &abort_list);
1071
1072 if (eac_next == NULL)
1073 eac_next = ptr;
1074
1075 SetDead(client_p); /* You are dead my friend */
1076 }
1077
1078 /*
1079 * dead_link_on_read - report a read error if not already dead,
1080 * mark it as dead then exit it
1081 */
1082 void
1083 dead_link_on_read(struct Client *client_p, int error)
1084 {
1085 char errmsg[255];
1086 int current_error;
1087
1088 if (IsDefunct(client_p))
1089 return;
1090
1091 dbuf_clear(&client_p->localClient->buf_recvq);
1092 dbuf_clear(&client_p->localClient->buf_sendq);
1093
1094 current_error = get_sockerr(client_p->localClient->fd.fd);
1095
1096 if (IsServer(client_p) || IsHandshake(client_p))
1097 {
1098 int connected = CurrentTime - client_p->firsttime;
1099
1100 if (error == 0)
1101 {
1102 /* Admins get the real IP */
1103 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1104 "Server %s closed the connection",
1105 get_client_name(client_p, SHOW_IP));
1106
1107 /* Opers get a masked IP */
1108 sendto_realops_flags(UMODE_ALL, L_OPER,
1109 "Server %s closed the connection",
1110 get_client_name(client_p, MASK_IP));
1111
1112 ilog(L_NOTICE, "Server %s closed the connection",
1113 get_client_name(client_p, SHOW_IP));
1114 }
1115 else
1116 {
1117 report_error(L_ADMIN, "Lost connection to %s: %s",
1118 get_client_name(client_p, SHOW_IP), current_error);
1119 report_error(L_OPER, "Lost connection to %s: %s",
1120 get_client_name(client_p, MASK_IP), current_error);
1121 }
1122
1123 sendto_realops_flags(UMODE_ALL, L_ALL,
1124 "%s had been connected for %d day%s, %2d:%02d:%02d",
1125 client_p->name, connected/86400,
1126 (connected/86400 == 1) ? "" : "s",
1127 (connected % 86400) / 3600, (connected % 3600) / 60,
1128 connected % 60);
1129 }
1130
1131 if (error == 0)
1132 strlcpy(errmsg, "Remote host closed the connection",
1133 sizeof(errmsg));
1134 else
1135 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
1136 strerror(current_error));
1137
1138 exit_client(client_p, &me, errmsg);
1139 }
1140
1141 void
1142 exit_aborted_clients(void)
1143 {
1144 dlink_node *ptr;
1145 struct Client *target_p;
1146 const char *notice;
1147
1148 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1149 {
1150 target_p = ptr->data;
1151 eac_next = ptr->next;
1152
1153 if (target_p == NULL)
1154 {
1155 sendto_realops_flags(UMODE_ALL, L_ALL,
1156 "Warning: null client on abort_list!");
1157 dlinkDelete(ptr, &abort_list);
1158 free_dlink_node(ptr);
1159 continue;
1160 }
1161
1162 dlinkDelete(ptr, &abort_list);
1163
1164 if (IsSendQExceeded(target_p))
1165 notice = "Max SendQ exceeded";
1166 else
1167 notice = "Write error: connection closed";
1168
1169 exit_client(target_p, &me, notice);
1170 free_dlink_node(ptr);
1171 }
1172 }
1173
1174 /*
1175 * accept processing, this adds a form of "caller ID" to ircd
1176 *
1177 * If a client puts themselves into "caller ID only" mode,
1178 * only clients that match a client pointer they have put on
1179 * the accept list will be allowed to message them.
1180 *
1181 * Diane Bruce, "Dianora" db@db.net
1182 */
1183
1184 void
1185 del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
1186 {
1187 dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist);
1188
1189 MyFree(accept_p->nickptr);
1190 MyFree(accept_p->userptr);
1191 MyFree(accept_p->hostptr);
1192 MyFree(accept_p);
1193 }
1194
1195 struct split_nuh_item *
1196 find_accept(const char *nick, const char *user,
1197 const char *host, struct Client *client_p, int do_match)
1198 {
1199 dlink_node *ptr = NULL;
1200 /* XXX We wouldn't need that if match() would return 0 on match */
1201 int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1202
1203 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1204 {
1205 struct split_nuh_item *accept_p = ptr->data;
1206
1207 if (cmpfunc(accept_p->nickptr, nick) == do_match &&
1208 cmpfunc(accept_p->userptr, user) == do_match &&
1209 cmpfunc(accept_p->hostptr, host) == do_match)
1210 return accept_p;
1211 }
1212
1213 return NULL;
1214 }
1215
1216 /* accept_message()
1217 *
1218 * inputs - pointer to source client
1219 * - pointer to target client
1220 * output - 1 if accept this message 0 if not
1221 * side effects - See if source is on target's allow list
1222 */
1223 int
1224 accept_message(struct Client *source,
1225 struct Client *target)
1226 {
1227 dlink_node *ptr = NULL;
1228
1229 if (source == target || find_accept(source->name, source->username,
1230 source->host, target, 1))
1231 return 1;
1232
1233 if (IsSoftCallerId(target))
1234 DLINK_FOREACH(ptr, target->channel.head)
1235 if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1236 return 1;
1237
1238 return 0;
1239 }
1240
1241 /* del_all_accepts()
1242 *
1243 * inputs - pointer to exiting client
1244 * output - NONE
1245 * side effects - Walk through given clients acceptlist and remove all entries
1246 */
1247 void
1248 del_all_accepts(struct Client *client_p)
1249 {
1250 dlink_node *ptr = NULL, *next_ptr = NULL;
1251
1252 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1253 del_accept(ptr->data, client_p);
1254 }
1255
1256 /* change_local_nick()
1257 *
1258 * inputs - pointer to server
1259 * - pointer to client
1260 * - nick
1261 * output -
1262 * side effects - changes nick of a LOCAL user
1263 */
1264 void
1265 change_local_nick(struct Client *client_p, struct Client *source_p, const char *nick)
1266 {
1267 int samenick = 0;
1268
1269 assert(source_p->name[0] && !EmptyString(nick));
1270
1271 /*
1272 * Client just changing his/her nick. If he/she is
1273 * on a channel, send note of change to all clients
1274 * on that channel. Propagate notice to other servers.
1275 */
1276 if ((source_p->localClient->last_nick_change +
1277 ConfigFileEntry.max_nick_time) < CurrentTime)
1278 source_p->localClient->number_of_nick_changes = 0;
1279 source_p->localClient->last_nick_change = CurrentTime;
1280 source_p->localClient->number_of_nick_changes++;
1281
1282 if ((ConfigFileEntry.anti_nick_flood &&
1283 (source_p->localClient->number_of_nick_changes
1284 <= ConfigFileEntry.max_nick_changes)) ||
1285 !ConfigFileEntry.anti_nick_flood ||
1286 (IsOper(source_p) && ConfigFileEntry.no_oper_flood))
1287 {
1288 samenick = !irccmp(source_p->name, nick);
1289
1290 if (!samenick)
1291 {
1292 source_p->tsinfo = CurrentTime;
1293 clear_ban_cache_client(source_p);
1294 watch_check_hash(source_p, RPL_LOGOFF);
1295
1296 if (HasUMode(source_p, UMODE_REGISTERED))
1297 {
1298 unsigned int oldmodes = source_p->umodes;
1299 char modebuf[IRCD_BUFSIZE] = { '\0' };
1300
1301 DelUMode(source_p, UMODE_REGISTERED);
1302 send_umode(source_p, source_p, oldmodes, 0xffffffff, modebuf);
1303 }
1304 }
1305
1306 /* XXX - the format of this notice should eventually be changed
1307 * to either %s[%s@%s], or even better would be get_client_name() -bill
1308 */
1309 sendto_realops_flags(UMODE_NCHANGE, L_ALL, "Nick change: From %s to %s [%s@%s]",
1310 source_p->name, nick, source_p->username, source_p->host);
1311 sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s",
1312 source_p->name, source_p->username,
1313 source_p->host, nick);
1314 add_history(source_p, 1);
1315
1316 sendto_server(client_p, NULL, CAP_TS6, NOCAPS,
1317 ":%s NICK %s :%lu",
1318 ID(source_p), nick, (unsigned long)source_p->tsinfo);
1319 sendto_server(client_p, NULL, NOCAPS, CAP_TS6,
1320 ":%s NICK %s :%lu",
1321 source_p->name, nick, (unsigned long)source_p->tsinfo);
1322
1323 hash_del_client(source_p);
1324 strcpy(source_p->name, nick);
1325 hash_add_client(source_p);
1326
1327 if (!samenick)
1328 watch_check_hash(source_p, RPL_LOGON);
1329
1330 /* fd_desc is long enough */
1331 fd_note(&client_p->localClient->fd, "Nick: %s", nick);
1332 }
1333 else
1334 sendto_one(source_p, form_str(ERR_NICKTOOFAST),
1335 me.name, source_p->name, source_p->name,
1336 nick, ConfigFileEntry.max_nick_time);
1337 }

Properties

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