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root/svn/ircd-hybrid/trunk/src/client.c
Revision: 2678
Committed: Sun Dec 15 12:17:23 2013 UTC (10 years, 3 months ago) by michael
Content type: text/x-csrc
File size: 36198 byte(s)
Log Message:
- client.c:make_client(): make use of the SetUnknown() macro

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

Properties

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