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root/svn/branches/newio/src/client.c
Revision: 2181
Committed: Tue Jun 4 11:03:41 2013 UTC (10 years, 9 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid/trunk/src/client.c
File size: 35942 byte(s)
Log Message:
- Fixed debug assertion being triggered on ident lookup
  as reported by Stuart Walsh

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 "event.h"
30 #include "fdlist.h"
31 #include "hash.h"
32 #include "irc_string.h"
33 #include "ircd.h"
34 #include "s_gline.h"
35 #include "numeric.h"
36 #include "packet.h"
37 #include "s_auth.h"
38 #include "s_bsd.h"
39 #include "conf.h"
40 #include "log.h"
41 #include "s_misc.h"
42 #include "s_serv.h"
43 #include "send.h"
44 #include "whowas.h"
45 #include "s_user.h"
46 #include "dbuf.h"
47 #include "memory.h"
48 #include "mempool.h"
49 #include "hostmask.h"
50 #include "listener.h"
51 #include "irc_res.h"
52 #include "userhost.h"
53 #include "watch.h"
54 #include "rng_mt.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 mp_pool_t *client_pool = NULL;
69 static mp_pool_t *lclient_pool = 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 MaskItem *);
79
80
81 /* client_init()
82 *
83 * inputs - NONE
84 * output - NONE
85 * side effects - initialize client free memory
86 */
87 void
88 client_init(void)
89 {
90 /* start off the check ping event .. -- adrian
91 * Every 30 seconds is plenty -- db
92 */
93 client_pool = mp_pool_new(sizeof(struct Client), MP_CHUNK_SIZE_CLIENT);
94 lclient_pool = mp_pool_new(sizeof(struct LocalUser), MP_CHUNK_SIZE_LCLIENT);
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 = mp_pool_get(client_pool);
117
118 memset(client_p, 0, sizeof(*client_p));
119
120 if (from == NULL)
121 {
122 client_p->from = client_p; /* 'from' of local client is self! */
123 client_p->localClient = mp_pool_get(lclient_pool);
124
125 memset(client_p->localClient, 0, sizeof(*client_p->localClient));
126
127 client_p->localClient->since = CurrentTime;
128 client_p->localClient->lasttime = CurrentTime;
129 client_p->localClient->firsttime = CurrentTime;
130 client_p->localClient->registration = REG_INIT;
131
132 /* as good a place as any... */
133 dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list);
134 }
135 else
136 client_p->from = from; /* 'from' of local client is self! */
137
138 client_p->idhnext = client_p;
139 client_p->hnext = client_p;
140 client_p->status = STAT_UNKNOWN;
141 strcpy(client_p->username, "unknown");
142 strcpy(client_p->svid, "0");
143
144 return client_p;
145 }
146
147 /*
148 * free_client
149 *
150 * inputs - pointer to client
151 * output - NONE
152 * side effects - client pointed to has its memory freed
153 */
154 static void
155 free_client(struct Client *client_p)
156 {
157 assert(client_p != NULL);
158 assert(client_p != &me);
159 assert(client_p->hnext == client_p);
160 assert(client_p->idhnext == client_p);
161 assert(client_p->channel.head == NULL);
162 assert(dlink_list_length(&client_p->channel) == 0);
163 assert(dlink_list_length(&client_p->whowas) == 0);
164 assert(!IsServer(client_p) || (IsServer(client_p) && client_p->serv));
165
166 MyFree(client_p->serv);
167
168 if (MyConnect(client_p))
169 {
170 assert(client_p->localClient->invited.head == NULL);
171 assert(dlink_list_length(&client_p->localClient->invited) == 0);
172 assert(dlink_list_length(&client_p->localClient->watches) == 0);
173 assert(IsClosing(client_p) && IsDead(client_p));
174
175 MyFree(client_p->localClient->response);
176 MyFree(client_p->localClient->auth_oper);
177
178 /*
179 * clean up extra sockets from P-lines which have been discarded.
180 */
181 if (client_p->localClient->listener)
182 {
183 assert(0 < client_p->localClient->listener->ref_count);
184 if (0 == --client_p->localClient->listener->ref_count &&
185 !client_p->localClient->listener->active)
186 free_listener(client_p->localClient->listener);
187 }
188
189 dbuf_clear(&client_p->localClient->buf_recvq);
190 dbuf_clear(&client_p->localClient->buf_sendq);
191
192 mp_pool_release(client_p->localClient);
193 }
194
195 mp_pool_release(client_p);
196 }
197
198 /*
199 * check_pings - go through the local client list and check activity
200 * kill off stuff that should die
201 *
202 * inputs - NOT USED (from event)
203 * output - next time_t when check_pings() should be called again
204 * side effects -
205 *
206 *
207 * A PING can be sent to clients as necessary.
208 *
209 * Client/Server ping outs are handled.
210 */
211
212 /*
213 * Addon from adrian. We used to call this after nextping seconds,
214 * however I've changed it to run once a second. This is only for
215 * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
216 * run once a second makes life a lot easier - when a new client connects
217 * and they need a ping in 4 seconds, if nextping was set to 20 seconds
218 * we end up waiting 20 seconds. This is stupid. :-)
219 * I will optimise (hah!) check_pings() once I've finished working on
220 * tidying up other network IO evilnesses.
221 * -- adrian
222 */
223
224 static void
225 check_pings(void *notused)
226 {
227 check_pings_list(&local_client_list);
228 check_pings_list(&serv_list);
229 check_unknowns_list();
230 }
231
232 /* check_pings_list()
233 *
234 * inputs - pointer to list to check
235 * output - NONE
236 * side effects -
237 */
238 static void
239 check_pings_list(dlink_list *list)
240 {
241 char scratch[32]; /* way too generous but... */
242 int ping = 0; /* ping time value from client */
243 dlink_node *ptr = NULL, *next_ptr = NULL;
244
245 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
246 {
247 struct Client *client_p = ptr->data;
248
249 /*
250 ** Note: No need to notify opers here. It's
251 ** already done when "FLAGS_DEADSOCKET" is set.
252 */
253 if (IsDead(client_p))
254 {
255 /* Ignore it, its been exited already */
256 continue;
257 }
258
259 if (!IsRegistered(client_p))
260 ping = CONNECTTIMEOUT;
261 else
262 ping = get_client_ping(&client_p->localClient->confs);
263
264 if (ping < CurrentTime - client_p->localClient->lasttime)
265 {
266 if (!IsPingSent(client_p))
267 {
268 /*
269 * if we havent PINGed the connection and we havent
270 * heard from it in a while, PING it to make sure
271 * it is still alive.
272 */
273 SetPingSent(client_p);
274 client_p->localClient->lasttime = CurrentTime - ping;
275 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
276 }
277 else
278 {
279 if (CurrentTime - client_p->localClient->lasttime >= 2 * ping)
280 {
281 /*
282 * If the client/server hasn't talked to us in 2*ping seconds
283 * and it has a ping time, then close its connection.
284 */
285 if (IsServer(client_p) || IsHandshake(client_p))
286 {
287 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
288 "No response from %s, closing link",
289 get_client_name(client_p, HIDE_IP));
290 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
291 "No response from %s, closing link",
292 get_client_name(client_p, MASK_IP));
293 ilog(LOG_TYPE_IRCD, "No response from %s, closing link",
294 get_client_name(client_p, HIDE_IP));
295 }
296
297 snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds",
298 (int)(CurrentTime - client_p->localClient->lasttime));
299 exit_client(client_p, &me, scratch);
300 }
301 }
302 }
303 }
304 }
305
306 /* check_unknowns_list()
307 *
308 * inputs - pointer to list of unknown clients
309 * output - NONE
310 * side effects - unknown clients get marked for termination after n seconds
311 */
312 static void
313 check_unknowns_list(void)
314 {
315 dlink_node *ptr, *next_ptr;
316
317 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
318 {
319 struct Client *client_p = ptr->data;
320
321 /*
322 * Check UNKNOWN connections - if they have been in this state
323 * for > 30s, close them.
324 */
325 if (IsAuthFinished(client_p) && (CurrentTime - client_p->localClient->firsttime) > 30)
326 exit_client(client_p, &me, "Registration timed out");
327 }
328 }
329
330 /* check_conf_klines()
331 *
332 * inputs - NONE
333 * output - NONE
334 * side effects - Check all connections for a pending kline against the
335 * client, exit the client if a kline matches.
336 */
337 void
338 check_conf_klines(void)
339 {
340 struct Client *client_p = NULL; /* current local client_p being examined */
341 struct MaskItem *conf = NULL;
342 dlink_node *ptr, *next_ptr;
343
344 DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
345 {
346 client_p = ptr->data;
347
348 /* If a client is already being exited
349 */
350 if (IsDead(client_p) || !IsClient(client_p))
351 continue;
352
353 if ((conf = find_dline_conf(&client_p->localClient->ip,
354 client_p->localClient->aftype)) != NULL)
355 {
356 if (conf->type == CONF_EXEMPT)
357 continue;
358
359 ban_them(client_p, conf);
360 continue; /* and go examine next fd/client_p */
361 }
362
363 if (ConfigFileEntry.glines && (conf = find_gline(client_p)))
364 {
365 if (IsExemptKline(client_p) ||
366 IsExemptGline(client_p))
367 {
368 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
369 "GLINE over-ruled for %s, client is %sline_exempt",
370 get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
371 continue;
372 }
373
374 ban_them(client_p, conf);
375 /* and go examine next fd/client_p */
376 continue;
377 }
378
379 if ((conf = find_kill(client_p)) != NULL)
380 {
381 if (IsExemptKline(client_p))
382 {
383 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
384 "KLINE over-ruled for %s, client is kline_exempt",
385 get_client_name(client_p, HIDE_IP));
386 continue;
387 }
388
389 ban_them(client_p, conf);
390 continue;
391 }
392
393 if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info,
394 NULL, NULL, 0)))
395 {
396 ban_them(client_p, conf);
397 continue;
398 }
399 }
400
401 /* also check the unknowns list for new dlines */
402 DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
403 {
404 client_p = ptr->data;
405
406 if ((conf = find_dline_conf(&client_p->localClient->ip,
407 client_p->localClient->aftype)))
408 {
409 if (conf->type == CONF_EXEMPT)
410 continue;
411
412 exit_client(client_p, &me, "D-lined");
413 }
414 }
415 }
416
417 /*
418 * ban_them
419 *
420 * inputs - pointer to client to ban
421 * - pointer to MaskItem
422 * output - NONE
423 * side effects - given client_p is banned
424 */
425 static void
426 ban_them(struct Client *client_p, struct MaskItem *conf)
427 {
428 const char *user_reason = NULL; /* What is sent to user */
429 const char *type_string = NULL;
430 const char dline_string[] = "D-line";
431 const char kline_string[] = "K-line";
432 const char gline_string[] = "G-line";
433 const char xline_string[] = "X-line";
434
435 switch (conf->type)
436 {
437 case CONF_KLINE:
438 type_string = kline_string;
439 break;
440 case CONF_DLINE:
441 type_string = dline_string;
442 break;
443 case CONF_GLINE:
444 type_string = gline_string;
445 break;
446 case CONF_XLINE:
447 type_string = xline_string;
448 ++conf->count;
449 break;
450 default:
451 assert(0);
452 break;
453 }
454
455 user_reason = conf->reason ? conf->reason : type_string;
456
457 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s",
458 type_string, get_client_name(client_p, HIDE_IP));
459
460 if (IsClient(client_p))
461 sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
462 me.name, client_p->name, user_reason);
463
464 exit_client(client_p, &me, user_reason);
465 }
466
467 /* update_client_exit_stats()
468 *
469 * input - pointer to client
470 * output - NONE
471 * side effects -
472 */
473 static void
474 update_client_exit_stats(struct Client *client_p)
475 {
476 if (IsClient(client_p))
477 {
478 assert(Count.total > 0);
479 --Count.total;
480 if (HasUMode(client_p, UMODE_OPER))
481 --Count.oper;
482 if (HasUMode(client_p, UMODE_INVISIBLE))
483 --Count.invisi;
484 }
485 else if (IsServer(client_p))
486 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE,
487 "Server %s split from %s",
488 client_p->name, client_p->servptr->name);
489
490 if (splitchecking && !splitmode)
491 check_splitmode(NULL);
492 }
493
494 /* find_person()
495 *
496 * inputs - pointer to name
497 * output - return client pointer
498 * side effects - find person by (nick)name
499 */
500 struct Client *
501 find_person(const struct Client *client_p, const char *name)
502 {
503 struct Client *c2ptr = NULL;
504
505 if (IsDigit(*name))
506 {
507 if ((c2ptr = hash_find_id(name)) != NULL)
508 {
509 /* invisible users shall not be found by UID guessing */
510 if (HasUMode(c2ptr, UMODE_INVISIBLE))
511 if (!IsServer(client_p) && !HasFlag(client_p, FLAGS_SERVICE))
512 c2ptr = NULL;
513 }
514 }
515 else
516 c2ptr = hash_find_client(name);
517
518 return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL);
519 }
520
521 /*
522 * find_chasing - find the client structure for a nick name (user)
523 * using history mechanism if necessary. If the client is not found,
524 * an error message (NO SUCH NICK) is generated. If the client was found
525 * through the history, chasing will be 1 and otherwise 0.
526 */
527 struct Client *
528 find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing)
529 {
530 struct Client *who = find_person(client_p, user);
531
532 if (chasing)
533 *chasing = 0;
534
535 if (who)
536 return who;
537
538 if (IsDigit(*user))
539 return NULL;
540
541 if ((who = get_history(user,
542 (time_t)ConfigFileEntry.kill_chase_time_limit))
543 == NULL)
544 {
545 sendto_one(source_p, form_str(ERR_NOSUCHNICK),
546 me.name, source_p->name, user);
547 return NULL;
548 }
549
550 if (chasing)
551 *chasing = 1;
552
553 return who;
554 }
555
556 /*
557 * get_client_name - Return the name of the client
558 * for various tracking and
559 * admin purposes. The main purpose of this function is to
560 * return the "socket host" name of the client, if that
561 * differs from the advertised name (other than case).
562 * But, this can be used to any client structure.
563 *
564 * NOTE 1:
565 * Watch out the allocation of "nbuf", if either source_p->name
566 * or source_p->sockhost gets changed into pointers instead of
567 * directly allocated within the structure...
568 *
569 * NOTE 2:
570 * Function return either a pointer to the structure (source_p) or
571 * to internal buffer (nbuf). *NEVER* use the returned pointer
572 * to modify what it points!!!
573 */
574 const char *
575 get_client_name(const struct Client *client, enum addr_mask_type type)
576 {
577 static char nbuf[HOSTLEN * 2 + USERLEN + 5];
578
579 assert(client != NULL);
580
581 if (!MyConnect(client))
582 return client->name;
583
584 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
585 {
586 if (!irccmp(client->name, client->host))
587 return client->name;
588 else if (ConfigServerHide.hide_server_ips)
589 type = MASK_IP;
590 }
591
592 if (ConfigFileEntry.hide_spoof_ips)
593 if (type == SHOW_IP && IsIPSpoof(client))
594 type = MASK_IP;
595
596 /* And finally, let's get the host information, ip or name */
597 switch (type)
598 {
599 case SHOW_IP:
600 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
601 client->name,
602 client->username, client->sockhost);
603 break;
604 case MASK_IP:
605 if (client->localClient->aftype == AF_INET)
606 snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
607 client->name, client->username);
608 else
609 snprintf(nbuf, sizeof(nbuf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]",
610 client->name, client->username);
611 break;
612 default:
613 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
614 client->name,
615 client->username, client->host);
616 }
617
618 return nbuf;
619 }
620
621 void
622 free_exited_clients(void)
623 {
624 dlink_node *ptr = NULL, *next = NULL;
625
626 DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
627 {
628 free_client(ptr->data);
629 dlinkDelete(ptr, &dead_list);
630 free_dlink_node(ptr);
631 }
632 }
633
634 /*
635 * Exit one client, local or remote. Assuming all dependents have
636 * been already removed, and socket closed for local client.
637 *
638 * The only messages generated are QUITs on channels.
639 */
640 static void
641 exit_one_client(struct Client *source_p, const char *quitmsg)
642 {
643 dlink_node *lp = NULL, *next_lp = NULL;
644
645 assert(!IsMe(source_p));
646
647 if (IsClient(source_p))
648 {
649 if (source_p->servptr->serv != NULL)
650 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
651
652 /*
653 * If a person is on a channel, send a QUIT notice
654 * to every client (person) on the same channel (so
655 * that the client can show the "**signoff" message).
656 * (Note: The notice is to the local clients *only*)
657 */
658 sendto_common_channels_local(source_p, 0, 0, ":%s!%s@%s QUIT :%s",
659 source_p->name, source_p->username,
660 source_p->host, quitmsg);
661 DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
662 remove_user_from_channel(lp->data);
663
664 add_history(source_p, 0);
665 off_history(source_p);
666
667 watch_check_hash(source_p, RPL_LOGOFF);
668
669 if (MyConnect(source_p))
670 {
671 /* Clean up invitefield */
672 DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
673 del_invite(lp->data, source_p);
674
675 del_all_accepts(source_p);
676 }
677 }
678 else if (IsServer(source_p))
679 {
680 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
681
682 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
683 free_dlink_node(lp);
684 }
685
686 /* Remove source_p from the client lists */
687 if (HasID(source_p))
688 hash_del_id(source_p);
689 if (source_p->name[0])
690 hash_del_client(source_p);
691
692 if (IsUserHostIp(source_p))
693 delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
694
695 /* remove from global client list
696 * NOTE: source_p->node.next cannot be NULL if the client is added
697 * to global_client_list (there is always &me at its end)
698 */
699 if (source_p != NULL && source_p->node.next != NULL)
700 dlinkDelete(&source_p->node, &global_client_list);
701
702 update_client_exit_stats(source_p);
703
704 /* Check to see if the client isn't already on the dead list */
705 assert(dlinkFind(&dead_list, source_p) == NULL);
706
707 /* add to dead client dlist */
708 SetDead(source_p);
709 dlinkAdd(source_p, make_dlink_node(), &dead_list);
710 }
711
712 /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
713 * and servers to those servers that need them. A server needs the client
714 * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
715 * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
716 * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
717 * on that one -orabidoo
718 *
719 * This is now called on each local server -adx
720 */
721 static void
722 recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
723 struct Client *from, struct Client *to, const char *comment,
724 const char *splitstr)
725 {
726 dlink_node *ptr, *next;
727 struct Client *target_p;
728
729 assert(to != source_p); /* should be already removed from serv_list */
730
731 /* If this server can handle quit storm (QS) removal
732 * of dependents, just send the SQUIT
733 */
734 if (!IsCapable(to, CAP_QS))
735 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
736 {
737 target_p = ptr->data;
738 sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
739 }
740
741 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
742 recurse_send_quits(original_source_p, ptr->data, from, to,
743 comment, splitstr);
744
745 if ((source_p == original_source_p && to != from) ||
746 !IsCapable(to, CAP_QS))
747 {
748 /* don't use a prefix here - we have to be 100% sure the message
749 * will be accepted without Unknown prefix etc.. */
750 sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
751 }
752 }
753
754 /*
755 * Remove all clients that depend on source_p; assumes all (S)QUITs have
756 * already been sent. we make sure to exit a server's dependent clients
757 * and servers before the server itself; exit_one_client takes care of
758 * actually removing things off llists. tweaked from +CSr31 -orabidoo
759 */
760 static void
761 recurse_remove_clients(struct Client *source_p, const char *quitmsg)
762 {
763 dlink_node *ptr, *next;
764
765 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
766 exit_one_client(ptr->data, quitmsg);
767
768 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
769 {
770 recurse_remove_clients(ptr->data, quitmsg);
771 exit_one_client(ptr->data, quitmsg);
772 }
773 }
774
775 /*
776 ** Remove *everything* that depends on source_p, from all lists, and sending
777 ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
778 ** and its SQUITs have been sent except for the upstream one -orabidoo
779 */
780 static void
781 remove_dependents(struct Client *source_p, struct Client *from,
782 const char *comment, const char *splitstr)
783 {
784 dlink_node *ptr = NULL;
785
786 DLINK_FOREACH(ptr, serv_list.head)
787 recurse_send_quits(source_p, source_p, from, ptr->data,
788 comment, splitstr);
789
790 recurse_remove_clients(source_p, splitstr);
791 }
792
793 /*
794 * exit_client - exit a client of any type. Generally, you can use
795 * this on any struct Client, regardless of its state.
796 *
797 * Note, you shouldn't exit remote _users_ without first doing
798 * AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message.
799 * However, it is perfectly correct to call exit_client to force a _server_
800 * quit (either local or remote one).
801 *
802 * inputs: - a client pointer that is going to be exited
803 * - for servers, the second argument is a pointer to who
804 * is firing the server. This side won't get any generated
805 * messages. NEVER NULL!
806 * output: none
807 * side effects: the client is delinked from all lists, disconnected,
808 * and the rest of IRC network is notified of the exit.
809 * Client memory is scheduled to be freed
810 */
811 void
812 exit_client(struct Client *source_p, struct Client *from, const char *comment)
813 {
814 dlink_node *m = NULL;
815
816 if (MyConnect(source_p))
817 {
818 /* DO NOT REMOVE. exit_client can be called twice after a failed
819 * read/write.
820 */
821 if (IsClosing(source_p))
822 return;
823
824 SetClosing(source_p);
825
826 if (IsIpHash(source_p))
827 remove_one_ip(&source_p->localClient->ip);
828
829 delete_auth(&source_p->localClient->auth);
830
831 /*
832 * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
833 * STAT_HANDSHAKE or STAT_UNKNOWN
834 * all of which are lumped together into unknown_list
835 *
836 * In all above cases IsRegistered() will not be true.
837 */
838 if (!IsRegistered(source_p))
839 {
840 assert(dlinkFind(&unknown_list, source_p));
841
842 dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
843 }
844 else if (IsClient(source_p))
845 {
846 time_t on_for = CurrentTime - source_p->localClient->firsttime;
847 assert(Count.local > 0);
848 Count.local--;
849
850 if (HasUMode(source_p, UMODE_OPER))
851 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
852 free_dlink_node(m);
853
854 assert(dlinkFind(&local_client_list, source_p));
855 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
856
857 if (source_p->localClient->list_task != NULL)
858 free_list_task(source_p->localClient->list_task, source_p);
859
860 watch_del_watch_list(source_p);
861 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
862 "Client exiting: %s (%s@%s) [%s] [%s]",
863 source_p->name, source_p->username, source_p->host, comment,
864 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
865 "255.255.255.255" : source_p->sockhost);
866 sendto_realops_flags(UMODE_CCONN_FULL, L_ALL, SEND_NOTICE,
867 "CLIEXIT: %s %s %s %s 0 %s",
868 source_p->name,
869 source_p->username,
870 source_p->host,
871 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
872 "255.255.255.255" : source_p->sockhost,
873 comment);
874 ilog(LOG_TYPE_USER, "%s (%3u:%02u:%02u): %s!%s@%s %llu/%llu",
875 myctime(source_p->localClient->firsttime), (unsigned int)(on_for / 3600),
876 (unsigned int)((on_for % 3600)/60), (unsigned int)(on_for % 60),
877 source_p->name, source_p->username, source_p->host,
878 source_p->localClient->send.bytes>>10,
879 source_p->localClient->recv.bytes>>10);
880 }
881 else if (IsServer(source_p))
882 {
883 assert(Count.myserver > 0);
884 --Count.myserver;
885
886 assert(dlinkFind(&serv_list, source_p));
887 dlinkDelete(&source_p->localClient->lclient_node, &serv_list);
888 unset_chcap_usage_counts(source_p);
889 }
890
891 if (!IsDead(source_p))
892 {
893 if (IsServer(source_p))
894 {
895 /* for them, we are exiting the network */
896 sendto_one(source_p, ":%s SQUIT %s :%s",
897 ID_or_name(from, source_p), me.name, comment);
898 }
899
900 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
901 source_p->host, comment);
902 }
903
904 /*
905 ** Currently only server connections can have
906 ** depending remote clients here, but it does no
907 ** harm to check for all local clients. In
908 ** future some other clients than servers might
909 ** have remotes too...
910 **
911 ** Close the Client connection first and mark it
912 ** so that no messages are attempted to send to it.
913 ** Remember it makes source_p->from == NULL.
914 */
915 close_connection(source_p);
916 }
917 else if (IsClient(source_p) && HasFlag(source_p->servptr, FLAGS_EOB))
918 sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE,
919 "Client exiting at %s: %s (%s@%s) [%s]",
920 source_p->servptr->name, source_p->name,
921 source_p->username, source_p->host, comment);
922
923 if (IsServer(source_p))
924 {
925 char splitstr[HOSTLEN + HOSTLEN + 2];
926
927 /* This shouldn't ever happen */
928 assert(source_p->serv != NULL && source_p->servptr != NULL);
929
930 if (ConfigServerHide.hide_servers)
931 /*
932 * Set netsplit message to "*.net *.split" to still show
933 * that its a split, but hide the servers splitting
934 */
935 strcpy(splitstr, "*.net *.split");
936 else
937 snprintf(splitstr, sizeof(splitstr), "%s %s",
938 source_p->servptr->name, source_p->name);
939
940 remove_dependents(source_p, from->from, comment, splitstr);
941
942 if (source_p->servptr == &me)
943 {
944 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
945 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
946 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
947 source_p->localClient->send.bytes >> 10,
948 source_p->localClient->recv.bytes >> 10);
949 ilog(LOG_TYPE_IRCD, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
950 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
951 source_p->localClient->send.bytes >> 10,
952 source_p->localClient->recv.bytes >> 10);
953 }
954 }
955 else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED))
956 {
957 sendto_server(from->from, CAP_TS6, NOCAPS,
958 ":%s QUIT :%s", ID(source_p), comment);
959 sendto_server(from->from, NOCAPS, CAP_TS6,
960 ":%s QUIT :%s", source_p->name, comment);
961 }
962
963 /* The client *better* be off all of the lists */
964 assert(dlinkFind(&unknown_list, source_p) == NULL);
965 assert(dlinkFind(&local_client_list, source_p) == NULL);
966 assert(dlinkFind(&serv_list, source_p) == NULL);
967 assert(dlinkFind(&oper_list, source_p) == NULL);
968
969 exit_one_client(source_p, comment);
970 }
971
972 /*
973 * dead_link_on_write - report a write error if not already dead,
974 * mark it as dead then exit it
975 */
976 void
977 dead_link_on_write(struct Client *client_p, int ierrno)
978 {
979 dlink_node *ptr;
980
981 if (IsDefunct(client_p))
982 return;
983
984 dbuf_clear(&client_p->localClient->buf_recvq);
985 dbuf_clear(&client_p->localClient->buf_sendq);
986
987 assert(dlinkFind(&abort_list, client_p) == NULL);
988 ptr = make_dlink_node();
989 /* don't let exit_aborted_clients() finish yet */
990 dlinkAddTail(client_p, ptr, &abort_list);
991
992 if (eac_next == NULL)
993 eac_next = ptr;
994
995 SetDead(client_p); /* You are dead my friend */
996 }
997
998 /*
999 * dead_link_on_read - report a read error if not already dead,
1000 * mark it as dead then exit it
1001 */
1002 void
1003 dead_link_on_read(struct Client *client_p, int error)
1004 {
1005 char errmsg[255];
1006 int current_error;
1007
1008 if (IsDefunct(client_p))
1009 return;
1010
1011 dbuf_clear(&client_p->localClient->buf_recvq);
1012 dbuf_clear(&client_p->localClient->buf_sendq);
1013
1014 current_error = get_sockerr(client_p->localClient->fd.fd);
1015
1016 if (IsServer(client_p) || IsHandshake(client_p))
1017 {
1018 int connected = CurrentTime - client_p->localClient->firsttime;
1019
1020 if (error == 0)
1021 {
1022 /* Admins get the real IP */
1023 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
1024 "Server %s closed the connection",
1025 get_client_name(client_p, SHOW_IP));
1026
1027 /* Opers get a masked IP */
1028 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
1029 "Server %s closed the connection",
1030 get_client_name(client_p, MASK_IP));
1031
1032 ilog(LOG_TYPE_IRCD, "Server %s closed the connection",
1033 get_client_name(client_p, SHOW_IP));
1034 }
1035 else
1036 {
1037 report_error(L_ADMIN, "Lost connection to %s: %s",
1038 get_client_name(client_p, SHOW_IP), current_error);
1039 report_error(L_OPER, "Lost connection to %s: %s",
1040 get_client_name(client_p, MASK_IP), current_error);
1041 }
1042
1043 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1044 "%s had been connected for %d day%s, %2d:%02d:%02d",
1045 client_p->name, connected/86400,
1046 (connected/86400 == 1) ? "" : "s",
1047 (connected % 86400) / 3600, (connected % 3600) / 60,
1048 connected % 60);
1049 }
1050
1051 if (error == 0)
1052 strlcpy(errmsg, "Remote host closed the connection",
1053 sizeof(errmsg));
1054 else
1055 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
1056 strerror(current_error));
1057
1058 exit_client(client_p, &me, errmsg);
1059 }
1060
1061 void
1062 exit_aborted_clients(void)
1063 {
1064 dlink_node *ptr;
1065 struct Client *target_p;
1066 const char *notice;
1067
1068 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1069 {
1070 target_p = ptr->data;
1071 eac_next = ptr->next;
1072
1073 if (target_p == NULL)
1074 {
1075 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1076 "Warning: null client on abort_list!");
1077 dlinkDelete(ptr, &abort_list);
1078 free_dlink_node(ptr);
1079 continue;
1080 }
1081
1082 dlinkDelete(ptr, &abort_list);
1083
1084 if (IsSendQExceeded(target_p))
1085 notice = "Max SendQ exceeded";
1086 else
1087 notice = "Write error: connection closed";
1088
1089 exit_client(target_p, &me, notice);
1090 free_dlink_node(ptr);
1091 }
1092 }
1093
1094 /*
1095 * accept processing, this adds a form of "caller ID" to ircd
1096 *
1097 * If a client puts themselves into "caller ID only" mode,
1098 * only clients that match a client pointer they have put on
1099 * the accept list will be allowed to message them.
1100 *
1101 * Diane Bruce, "Dianora" db@db.net
1102 */
1103
1104 void
1105 del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
1106 {
1107 dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist);
1108
1109 MyFree(accept_p->nickptr);
1110 MyFree(accept_p->userptr);
1111 MyFree(accept_p->hostptr);
1112 MyFree(accept_p);
1113 }
1114
1115 struct split_nuh_item *
1116 find_accept(const char *nick, const char *user,
1117 const char *host, struct Client *client_p, int do_match)
1118 {
1119 dlink_node *ptr = NULL;
1120 /* XXX We wouldn't need that if match() would return 0 on match */
1121 int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1122
1123 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1124 {
1125 struct split_nuh_item *accept_p = ptr->data;
1126
1127 if (!cmpfunc(accept_p->nickptr, nick) &&
1128 !cmpfunc(accept_p->userptr, user) &&
1129 !cmpfunc(accept_p->hostptr, host))
1130 return accept_p;
1131 }
1132
1133 return NULL;
1134 }
1135
1136 /* accept_message()
1137 *
1138 * inputs - pointer to source client
1139 * - pointer to target client
1140 * output - 1 if accept this message 0 if not
1141 * side effects - See if source is on target's allow list
1142 */
1143 int
1144 accept_message(struct Client *source,
1145 struct Client *target)
1146 {
1147 dlink_node *ptr = NULL;
1148
1149 if (source == target || find_accept(source->name, source->username,
1150 source->host, target, 1))
1151 return 1;
1152
1153 if (HasUMode(target, UMODE_SOFTCALLERID))
1154 DLINK_FOREACH(ptr, target->channel.head)
1155 if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1156 return 1;
1157
1158 return 0;
1159 }
1160
1161 /* del_all_accepts()
1162 *
1163 * inputs - pointer to exiting client
1164 * output - NONE
1165 * side effects - Walk through given clients acceptlist and remove all entries
1166 */
1167 void
1168 del_all_accepts(struct Client *client_p)
1169 {
1170 dlink_node *ptr = NULL, *next_ptr = NULL;
1171
1172 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1173 del_accept(ptr->data, client_p);
1174 }
1175
1176 unsigned int
1177 idle_time_get(const struct Client *source_p, const struct Client *target_p)
1178 {
1179 unsigned int idle = 0;
1180 unsigned int min_idle = 0;
1181 unsigned int max_idle = 0;
1182 const struct ClassItem *class = get_class_ptr(&target_p->localClient->confs);
1183
1184 if (!(class->flags & CLASS_FLAGS_FAKE_IDLE) || target_p == source_p)
1185 return CurrentTime - target_p->localClient->last_privmsg;
1186 if (HasUMode(source_p, UMODE_OPER) &&
1187 !(class->flags & CLASS_FLAGS_HIDE_IDLE_FROM_OPERS))
1188 return CurrentTime - target_p->localClient->last_privmsg;
1189
1190 min_idle = class->min_idle;
1191 max_idle = class->max_idle;
1192
1193 if (min_idle == max_idle)
1194 return min_idle;
1195
1196 if (class->flags & CLASS_FLAGS_RANDOM_IDLE)
1197 idle = genrand_int32();
1198 else
1199 idle = CurrentTime - target_p->localClient->last_privmsg;
1200
1201 if (max_idle == 0)
1202 idle = 0;
1203 else
1204 idle %= max_idle;
1205
1206 if (idle < min_idle)
1207 idle = min_idle + (idle % (max_idle - min_idle));
1208
1209 return idle;
1210 }

Properties

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