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root/svn/ircd-hybrid/trunk/src/client.c
Revision: 4975
Committed: Mon Dec 1 19:54:35 2014 UTC (9 years, 3 months ago) by michael
Content type: text/x-csrc
File size: 32622 byte(s)
Log Message:
- Fixed compile warnings due to shadowed global variables on RHEL/maybe other distros

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2014 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file client.c
23 * \brief Controls clients.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "client.h"
30 #include "event.h"
31 #include "hash.h"
32 #include "irc_string.h"
33 #include "ircd.h"
34 #include "numeric.h"
35 #include "auth.h"
36 #include "s_bsd.h"
37 #include "conf.h"
38 #include "log.h"
39 #include "misc.h"
40 #include "server.h"
41 #include "send.h"
42 #include "whowas.h"
43 #include "user.h"
44 #include "memory.h"
45 #include "mempool.h"
46 #include "hostmask.h"
47 #include "listener.h"
48 #include "userhost.h"
49 #include "watch.h"
50 #include "rng_mt.h"
51 #include "parse.h"
52 #include "ipcache.h"
53
54
55 dlink_list listing_client_list;
56 dlink_list unknown_list;
57 dlink_list local_client_list;
58 dlink_list local_server_list;
59 dlink_list global_client_list;
60 dlink_list global_server_list;
61 dlink_list oper_list;
62
63 static mp_pool_t *client_pool, *connection_pool;
64 static dlink_list dead_list, abort_list;
65 static dlink_node *eac_next; /* next aborted client to exit */
66
67
68 /*
69 * make_client - create a new Client struct and set it to initial state.
70 *
71 * from == NULL, create local client (a client connected
72 * to a socket).
73 * WARNING: This leaves the client in a dangerous
74 * state where fd == -1, dead flag is not set and
75 * the client is on the unknown_list; therefore,
76 * the first thing to do after calling make_client(NULL)
77 * is setting fd to something reasonable. -adx
78 *
79 * from, create remote client (behind a socket
80 * associated with the client defined by
81 * 'from'). ('from' is a local client!!).
82 */
83 struct Client *
84 make_client(struct Client *from)
85 {
86 struct Client *client_p = mp_pool_get(client_pool);
87
88 if (!from)
89 {
90 client_p->from = client_p; /* 'from' of local client is self! */
91 client_p->connection = mp_pool_get(connection_pool);
92 client_p->connection->since = CurrentTime;
93 client_p->connection->lasttime = CurrentTime;
94 client_p->connection->firsttime = CurrentTime;
95 client_p->connection->registration = REG_INIT;
96
97 /* as good a place as any... */
98 dlinkAdd(client_p, &client_p->connection->lclient_node, &unknown_list);
99 }
100 else
101 client_p->from = from; /* 'from' of local client is self! */
102
103 client_p->idhnext = client_p;
104 client_p->hnext = client_p;
105 SetUnknown(client_p);
106 strcpy(client_p->username, "unknown");
107 strcpy(client_p->account, "0");
108
109 return client_p;
110 }
111
112 /*
113 * free_client
114 *
115 * inputs - pointer to client
116 * output - NONE
117 * side effects - client pointed to has its memory freed
118 */
119 static void
120 free_client(struct Client *client_p)
121 {
122 assert(client_p);
123 assert(client_p != &me);
124 assert(client_p->hnext == client_p);
125 assert(client_p->idhnext == client_p);
126 assert(client_p->channel.head == NULL);
127 assert(dlink_list_length(&client_p->channel) == 0);
128 assert(dlink_list_length(&client_p->whowas) == 0);
129 assert(!IsServer(client_p) || client_p->serv);
130
131 MyFree(client_p->serv);
132 MyFree(client_p->certfp);
133
134 if (MyConnect(client_p))
135 {
136 assert(client_p->connection->invited.head == NULL);
137 assert(dlink_list_length(&client_p->connection->invited) == 0);
138 assert(dlink_list_length(&client_p->connection->watches) == 0);
139 assert(IsClosing(client_p) && IsDead(client_p));
140
141 MyFree(client_p->connection->challenge_response);
142 MyFree(client_p->connection->challenge_operator);
143 client_p->connection->challenge_response = NULL;
144 client_p->connection->challenge_operator = NULL;
145
146 /*
147 * Clean up extra sockets from listen{} blocks which have been discarded.
148 */
149 if (client_p->connection->listener)
150 {
151 listener_release(client_p->connection->listener);
152 client_p->connection->listener = NULL;
153 }
154
155 dbuf_clear(&client_p->connection->buf_recvq);
156 dbuf_clear(&client_p->connection->buf_sendq);
157
158 mp_pool_release(client_p->connection);
159 }
160
161 mp_pool_release(client_p);
162 }
163
164 /* check_pings_list()
165 *
166 * inputs - pointer to list to check
167 * output - NONE
168 * side effects -
169 */
170 static void
171 check_pings_list(dlink_list *list)
172 {
173 char buf[IRCD_BUFSIZE] = "";
174 int ping = 0; /* ping time value from client */
175 dlink_node *node = NULL, *node_next = NULL;
176
177 DLINK_FOREACH_SAFE(node, node_next, list->head)
178 {
179 struct Client *client_p = node->data;
180
181 if (IsDead(client_p))
182 continue; /* Ignore it, its been exited already */
183
184 if (!IsRegistered(client_p))
185 ping = CONNECTTIMEOUT;
186 else
187 ping = get_client_ping(&client_p->connection->confs);
188
189 if (ping < CurrentTime - client_p->connection->lasttime)
190 {
191 if (!IsPingSent(client_p))
192 {
193 /*
194 * If we haven't PINGed the connection and we haven't
195 * heard from it in a while, PING it to make sure
196 * it is still alive.
197 */
198 SetPingSent(client_p);
199 client_p->connection->lasttime = CurrentTime - ping;
200 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
201 }
202 else
203 {
204 if (CurrentTime - client_p->connection->lasttime >= 2 * ping)
205 {
206 /*
207 * If the client/server hasn't talked to us in 2*ping seconds
208 * and it has a ping time, then close its connection.
209 */
210 if (IsServer(client_p) || IsHandshake(client_p))
211 {
212 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
213 "No response from %s, closing link",
214 get_client_name(client_p, HIDE_IP));
215 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
216 "No response from %s, closing link",
217 get_client_name(client_p, MASK_IP));
218 ilog(LOG_TYPE_IRCD, "No response from %s, closing link",
219 get_client_name(client_p, HIDE_IP));
220 }
221
222 snprintf(buf, sizeof(buf), "Ping timeout: %d seconds",
223 (int)(CurrentTime - client_p->connection->lasttime));
224 exit_client(client_p, buf);
225 }
226 }
227 }
228 }
229 }
230
231 /* check_unknowns_list()
232 *
233 * inputs - pointer to list of unknown clients
234 * output - NONE
235 * side effects - unknown clients get marked for termination after n seconds
236 */
237 static void
238 check_unknowns_list(void)
239 {
240 dlink_node *node = NULL, *node_next = NULL;
241
242 DLINK_FOREACH_SAFE(node, node_next, unknown_list.head)
243 {
244 struct Client *client_p = node->data;
245
246 /*
247 * Check UNKNOWN connections - if they have been in this state
248 * for > 30s, close them.
249 */
250 if (IsAuthFinished(client_p) && (CurrentTime - client_p->connection->firsttime) > 30)
251 exit_client(client_p, "Registration timed out");
252 }
253 }
254
255 /*
256 * check_pings - go through the local client list and check activity
257 * kill off stuff that should die
258 *
259 * inputs - NOT USED (from event)
260 * output - next time_t when check_pings() should be called again
261 * side effects -
262 *
263 *
264 * A PING can be sent to clients as necessary.
265 *
266 * Client/Server ping outs are handled.
267 */
268
269 /*
270 * Addon from adrian. We used to call this after nextping seconds,
271 * however I've changed it to run once a second. This is only for
272 * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
273 * run once a second makes life a lot easier - when a new client connects
274 * and they need a ping in 4 seconds, if nextping was set to 20 seconds
275 * we end up waiting 20 seconds. This is stupid. :-)
276 * I will optimise (hah!) check_pings() once I've finished working on
277 * tidying up other network IO evilnesses.
278 * -- adrian
279 */
280
281 static void
282 check_pings(void *unused)
283 {
284 check_pings_list(&local_client_list);
285 check_pings_list(&local_server_list);
286 check_unknowns_list();
287 }
288
289 /* check_conf_klines()
290 *
291 * inputs - NONE
292 * output - NONE
293 * side effects - Check all connections for a pending kline against the
294 * client, exit the client if a kline matches.
295 */
296 void
297 check_conf_klines(void)
298 {
299 struct MaskItem *conf = NULL;
300 dlink_node *node = NULL, *node_next = NULL;
301
302 DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
303 {
304 struct Client *client_p = node->data;
305
306 /* If a client is already being exited */
307 if (IsDead(client_p))
308 continue;
309
310 if ((conf = find_conf_by_address(NULL, &client_p->connection->ip, CONF_DLINE,
311 client_p->connection->aftype, NULL, NULL, 1)))
312 {
313 conf_try_ban(client_p, conf);
314 continue; /* and go examine next fd/client_p */
315 }
316
317 if (ConfigGeneral.glines)
318 {
319 if ((conf = find_conf_by_address(client_p->host, &client_p->connection->ip,
320 CONF_GLINE, client_p->connection->aftype,
321 client_p->username, NULL, 1)))
322 {
323 conf_try_ban(client_p, conf);
324 /* and go examine next fd/client_p */
325 continue;
326 }
327 }
328
329 if ((conf = find_conf_by_address(client_p->host, &client_p->connection->ip,
330 CONF_KLINE, client_p->connection->aftype,
331 client_p->username, NULL, 1)))
332 {
333 conf_try_ban(client_p, conf);
334 continue;
335 }
336
337 if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info,
338 NULL, NULL, 0)))
339 {
340 conf_try_ban(client_p, conf);
341 continue;
342 }
343 }
344
345 /* also check the unknowns list for new dlines */
346 DLINK_FOREACH_SAFE(node, node_next, unknown_list.head)
347 {
348 struct Client *client_p = node->data;
349
350 if ((conf = find_conf_by_address(NULL, &client_p->connection->ip, CONF_DLINE,
351 client_p->connection->aftype, NULL, NULL, 1)))
352 {
353 conf_try_ban(client_p, conf);
354 continue; /* and go examine next fd/client_p */
355 }
356 }
357 }
358
359 /*
360 * conf_try_ban
361 *
362 * inputs - pointer to client to ban
363 * - pointer to MaskItem
364 * output - NONE
365 * side effects - given client_p is banned
366 */
367 void
368 conf_try_ban(struct Client *client_p, struct MaskItem *conf)
369 {
370 const char *user_reason = NULL; /* What is sent to user */
371 const char *type_string = NULL;
372 const char dline_string[] = "D-line";
373 const char kline_string[] = "K-line";
374 const char gline_string[] = "G-line";
375 const char xline_string[] = "X-line";
376
377 switch (conf->type)
378 {
379 case CONF_KLINE:
380 if (IsExemptKline(client_p))
381 {
382 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
383 "KLINE over-ruled for %s, client is kline_exempt",
384 get_client_name(client_p, HIDE_IP));
385 return;
386 }
387
388 type_string = kline_string;
389 break;
390 case CONF_DLINE:
391 if (find_conf_by_address(NULL, &client_p->connection->ip, CONF_EXEMPT,
392 client_p->connection->aftype, NULL, NULL, 1))
393 return;
394 type_string = dline_string;
395 break;
396 case CONF_GLINE:
397 if (IsExemptKline(client_p) ||
398 IsExemptGline(client_p))
399 {
400 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
401 "GLINE over-ruled for %s, client is %sline_exempt",
402 get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
403 return;
404 }
405
406 type_string = gline_string;
407 break;
408 case CONF_XLINE:
409 type_string = xline_string;
410 ++conf->count;
411 break;
412 default:
413 assert(0);
414 break;
415 }
416
417 user_reason = conf->reason ? conf->reason : type_string;
418
419 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s",
420 type_string, get_client_name(client_p, HIDE_IP));
421
422 if (IsClient(client_p))
423 sendto_one_numeric(client_p, &me, ERR_YOUREBANNEDCREEP, user_reason);
424
425 exit_client(client_p, user_reason);
426 }
427
428 /* update_client_exit_stats()
429 *
430 * input - pointer to client
431 * output - NONE
432 * side effects -
433 */
434 static void
435 update_client_exit_stats(struct Client *client_p)
436 {
437 if (IsClient(client_p))
438 {
439 assert(Count.total > 0);
440 --Count.total;
441 if (HasUMode(client_p, UMODE_OPER))
442 --Count.oper;
443 if (HasUMode(client_p, UMODE_INVISIBLE))
444 --Count.invisi;
445 }
446 else if (IsServer(client_p))
447 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE,
448 "Server %s split from %s",
449 client_p->name, client_p->servptr->name);
450
451 if (splitchecking && !splitmode)
452 check_splitmode(NULL);
453 }
454
455 /* find_person()
456 *
457 * inputs - pointer to name
458 * output - return client pointer
459 * side effects - find person by (nick)name
460 */
461 struct Client *
462 find_person(const struct Client *const source_p, const char *name)
463 {
464 struct Client *target_p = NULL;
465
466 if (IsDigit(*name))
467 {
468 if (IsServer(source_p->from))
469 target_p = hash_find_id(name);
470 }
471 else
472 target_p = hash_find_client(name);
473
474 return (target_p && IsClient(target_p)) ? target_p : NULL;
475 }
476
477 /*
478 * find_chasing - find the client structure for a nick name (name)
479 * using history mechanism if necessary. If the client is not found,
480 * an error message (NO SUCH NICK) is generated.
481 */
482 struct Client *
483 find_chasing(struct Client *source_p, const char *name)
484 {
485 struct Client *target_p = find_person(source_p, name);
486
487 if (target_p)
488 return target_p;
489
490 if (IsDigit(*name))
491 return NULL;
492
493 target_p = whowas_get_history(name, (time_t)ConfigGeneral.kill_chase_time_limit);
494
495 if (!target_p)
496 {
497 sendto_one_numeric(source_p, &me, ERR_NOSUCHNICK, name);
498 return NULL;
499 }
500
501 return target_p;
502 }
503
504 /*
505 * get_client_name - Return the name of the client
506 * for various tracking and
507 * admin purposes. The main purpose of this function is to
508 * return the "socket host" name of the client, if that
509 * differs from the advertised name (other than case).
510 * But, this can be used to any client structure.
511 *
512 * NOTE 1:
513 * Watch out the allocation of "buf", if either source_p->name
514 * or source_p->sockhost gets changed into pointers instead of
515 * directly allocated within the structure...
516 *
517 * NOTE 2:
518 * Function return either a pointer to the structure (source_p) or
519 * to internal buffer (buf). *NEVER* use the returned pointer
520 * to modify what it points!!!
521 */
522 const char *
523 get_client_name(const struct Client *client_p, enum addr_mask_type type)
524 {
525 static char buf[HOSTLEN * 2 + USERLEN + 5];
526
527 assert(client_p);
528
529 if (!MyConnect(client_p))
530 return client_p->name;
531
532 if (IsServer(client_p) || IsConnecting(client_p) || IsHandshake(client_p))
533 {
534 if (!irccmp(client_p->name, client_p->host))
535 return client_p->name;
536 else if (ConfigServerHide.hide_server_ips)
537 type = MASK_IP;
538 }
539
540 /* And finally, let's get the host information, ip or name */
541 switch (type)
542 {
543 case SHOW_IP:
544 snprintf(buf, sizeof(buf), "%s[%s@%s]",
545 client_p->name,
546 client_p->username, client_p->sockhost);
547 break;
548 case MASK_IP:
549 if (client_p->connection->aftype == AF_INET)
550 snprintf(buf, sizeof(buf), "%s[%s@255.255.255.255]",
551 client_p->name, client_p->username);
552 else
553 snprintf(buf, sizeof(buf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]",
554 client_p->name, client_p->username);
555 break;
556 default:
557 snprintf(buf, sizeof(buf), "%s[%s@%s]",
558 client_p->name,
559 client_p->username, client_p->host);
560 }
561
562 return buf;
563 }
564
565 void
566 free_exited_clients(void)
567 {
568 dlink_node *node = NULL, *node_next = NULL;
569
570 DLINK_FOREACH_SAFE(node, node_next, dead_list.head)
571 {
572 free_client(node->data);
573 dlinkDelete(node, &dead_list);
574 free_dlink_node(node);
575 }
576 }
577
578 /*
579 * Exit one client, local or remote. Assuming all dependents have
580 * been already removed, and socket closed for local client.
581 *
582 * The only messages generated are QUITs on channels.
583 */
584 static void
585 exit_one_client(struct Client *source_p, const char *comment)
586 {
587 dlink_node *node = NULL, *node_next = NULL;
588
589 assert(!IsMe(source_p));
590 assert(source_p != &me);
591
592 if (IsClient(source_p))
593 {
594 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
595 dlinkDelete(&source_p->node, &global_client_list);
596
597 /*
598 * If a person is on a channel, send a QUIT notice
599 * to every client (person) on the same channel (so
600 * that the client can show the "**signoff" message).
601 * (Note: The notice is to the local clients *only*)
602 */
603 sendto_common_channels_local(source_p, 0, 0, ":%s!%s@%s QUIT :%s",
604 source_p->name, source_p->username,
605 source_p->host, comment);
606
607 DLINK_FOREACH_SAFE(node, node_next, source_p->channel.head)
608 remove_user_from_channel(node->data);
609
610 whowas_add_history(source_p, 0);
611 whowas_off_history(source_p);
612
613 watch_check_hash(source_p, RPL_LOGOFF);
614
615 if (MyConnect(source_p))
616 {
617 /* Clean up invitefield */
618 DLINK_FOREACH_SAFE(node, node_next, source_p->connection->invited.head)
619 del_invite(node->data, source_p);
620
621 del_all_accepts(source_p);
622 }
623 }
624 else if (IsServer(source_p))
625 {
626 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
627 dlinkDelete(&source_p->node, &global_client_list);
628
629 if ((node = dlinkFindDelete(&global_server_list, source_p)))
630 free_dlink_node(node);
631 }
632
633 /* Remove source_p from the client lists */
634 if (source_p->id[0])
635 hash_del_id(source_p);
636
637 if (source_p->name[0])
638 hash_del_client(source_p);
639
640 if (IsUserHostIp(source_p))
641 delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
642
643 update_client_exit_stats(source_p);
644
645 /* Check to see if the client isn't already on the dead list */
646 assert(dlinkFind(&dead_list, source_p) == NULL);
647
648 /* add to dead client dlist */
649 SetDead(source_p);
650 dlinkAdd(source_p, make_dlink_node(), &dead_list);
651 }
652
653 /*
654 * Remove all clients that depend on source_p; assumes all (S)QUITs have
655 * already been sent. we make sure to exit a server's dependent clients
656 * and servers before the server itself; exit_one_client takes care of
657 * actually removing things off llists. tweaked from +CSr31 -orabidoo
658 */
659 static void
660 recurse_remove_clients(struct Client *source_p, const char *comment)
661 {
662 dlink_node *node = NULL, *node_next = NULL;
663
664 DLINK_FOREACH_SAFE(node, node_next, source_p->serv->client_list.head)
665 exit_one_client(node->data, comment);
666
667 DLINK_FOREACH_SAFE(node, node_next, source_p->serv->server_list.head)
668 {
669 recurse_remove_clients(node->data, comment);
670 exit_one_client(node->data, comment);
671 }
672 }
673
674 /*
675 * exit_client - exit a client of any type. Generally, you can use
676 * this on any struct Client, regardless of its state.
677 *
678 * Note, you shouldn't exit remote _users_ without first doing
679 * AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message.
680 *
681 * However, it is perfectly correct to call exit_client to force a _server_
682 * quit (either local or remote one).
683 *
684 *
685 * inputs: - a client pointer that is going to be exited
686 * output: none
687 * side effects: the client is delinked from all lists, disconnected,
688 * and the rest of IRC network is notified of the exit.
689 * Client memory is scheduled to be freed
690 */
691 void
692 exit_client(struct Client *source_p, const char *comment)
693 {
694 dlink_node *node = NULL;
695
696 assert(!IsMe(source_p));
697 assert(source_p != &me);
698
699 if (MyConnect(source_p))
700 {
701 /* DO NOT REMOVE. exit_client can be called twice after a failed
702 * read/write.
703 */
704 if (IsClosing(source_p))
705 return;
706
707 SetClosing(source_p);
708
709 if (HasFlag(source_p, FLAGS_IPHASH))
710 {
711 DelFlag(source_p, FLAGS_IPHASH);
712 ipcache_remove_address(&source_p->connection->ip);
713 }
714
715 delete_auth(&source_p->connection->auth);
716
717 /*
718 * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
719 * STAT_HANDSHAKE or STAT_UNKNOWN
720 * all of which are lumped together into unknown_list
721 *
722 * In all above cases IsRegistered() will not be true.
723 */
724 if (!IsRegistered(source_p))
725 {
726 assert(dlinkFind(&unknown_list, source_p));
727
728 dlinkDelete(&source_p->connection->lclient_node, &unknown_list);
729 }
730 else if (IsClient(source_p))
731 {
732 time_t on_for = CurrentTime - source_p->connection->firsttime;
733
734 assert(Count.local > 0);
735 --Count.local;
736
737 if (HasUMode(source_p, UMODE_OPER))
738 if ((node = dlinkFindDelete(&oper_list, source_p)))
739 free_dlink_node(node);
740
741 assert(dlinkFind(&local_client_list, source_p));
742 dlinkDelete(&source_p->connection->lclient_node, &local_client_list);
743
744 if (source_p->connection->list_task)
745 free_list_task(source_p);
746
747 watch_del_watch_list(source_p);
748 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
749 "Client exiting: %s (%s@%s) [%s] [%s]",
750 source_p->name, source_p->username, source_p->host, comment,
751 source_p->sockhost);
752
753 ilog(LOG_TYPE_USER, "%s (%3u:%02u:%02u): %s!%s@%s %llu/%llu",
754 myctime(source_p->connection->firsttime), (unsigned int)(on_for / 3600),
755 (unsigned int)((on_for % 3600)/60), (unsigned int)(on_for % 60),
756 source_p->name, source_p->username, source_p->host,
757 source_p->connection->send.bytes>>10,
758 source_p->connection->recv.bytes>>10);
759 }
760 else if (IsServer(source_p))
761 {
762 assert(Count.myserver > 0);
763 --Count.myserver;
764
765 assert(dlinkFind(&local_server_list, source_p));
766 dlinkDelete(&source_p->connection->lclient_node, &local_server_list);
767 }
768
769 if (!IsDead(source_p))
770 {
771 if (IsServer(source_p))
772 {
773 if (!HasFlag(source_p, FLAGS_SQUIT))
774 {
775 /* for them, we are exiting the network */
776 sendto_one(source_p, ":%s SQUIT %s :%s",
777 me.id, me.id, comment);
778 }
779 }
780
781 sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
782 source_p->host, comment);
783 }
784
785 close_connection(source_p);
786 }
787 else if (IsClient(source_p) && HasFlag(source_p->servptr, FLAGS_EOB))
788 sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE,
789 "Client exiting at %s: %s (%s@%s) [%s]",
790 source_p->servptr->name, source_p->name,
791 source_p->username, source_p->host, comment);
792
793 if (IsServer(source_p))
794 {
795 char splitstr[HOSTLEN + HOSTLEN + 2] = "";
796
797 /* This shouldn't ever happen */
798 assert(source_p->serv && source_p->servptr);
799
800 if (ConfigServerHide.hide_servers)
801 /*
802 * Set netsplit message to "*.net *.split" to still show
803 * that its a split, but hide the servers splitting
804 */
805 strlcpy(splitstr, "*.net *.split", sizeof(splitstr));
806 else
807 snprintf(splitstr, sizeof(splitstr), "%s %s",
808 source_p->servptr->name, source_p->name);
809
810 /* Send SQUIT for source_p in every direction. source_p is already off of local_server_list here */
811 if (!HasFlag(source_p, FLAGS_SQUIT))
812 sendto_server(NULL, 0, 0, "SQUIT %s :%s", source_p->id, comment);
813
814 /* Now exit the clients internally */
815 recurse_remove_clients(source_p, splitstr);
816
817 if (MyConnect(source_p))
818 {
819 int connected = CurrentTime - source_p->connection->firsttime;
820 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
821 "%s was connected for %d day%s, %2d:%02d:%02d. %llu/%llu sendK/recvK.",
822 source_p->name, connected/86400, (connected/86400 == 1) ? "" : "s",
823 (connected % 86400) / 3600, (connected % 3600) / 60, connected % 60,
824 source_p->connection->send.bytes >> 10,
825 source_p->connection->recv.bytes >> 10);
826 ilog(LOG_TYPE_IRCD, "%s was connected for %d day%s, %2d:%02d:%02d. %llu/%llu sendK/recvK.",
827 source_p->name, connected/86400, (connected/86400 == 1) ? "" : "s",
828 (connected % 86400) / 3600, (connected % 3600) / 60, connected % 60,
829 source_p->connection->send.bytes >> 10,
830 source_p->connection->recv.bytes >> 10);
831 }
832 }
833 else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED))
834 sendto_server(source_p->from, 0, 0, ":%s QUIT :%s",
835 source_p->id, comment);
836
837 /* The client *better* be off all of the lists */
838 assert(dlinkFind(&unknown_list, source_p) == NULL);
839 assert(dlinkFind(&local_client_list, source_p) == NULL);
840 assert(dlinkFind(&local_server_list, source_p) == NULL);
841 assert(dlinkFind(&oper_list, source_p) == NULL);
842
843 exit_one_client(source_p, comment);
844 }
845
846 /*
847 * dead_link_on_write - report a write error if not already dead,
848 * mark it as dead then exit it
849 */
850 void
851 dead_link_on_write(struct Client *client_p, int ierrno)
852 {
853 dlink_node *node;
854
855 if (IsDefunct(client_p))
856 return;
857
858 dbuf_clear(&client_p->connection->buf_recvq);
859 dbuf_clear(&client_p->connection->buf_sendq);
860
861 assert(dlinkFind(&abort_list, client_p) == NULL);
862 node = make_dlink_node();
863 /* don't let exit_aborted_clients() finish yet */
864 dlinkAddTail(client_p, node, &abort_list);
865
866 if (eac_next == NULL)
867 eac_next = node;
868
869 SetDead(client_p); /* You are dead my friend */
870 }
871
872 /*
873 * dead_link_on_read - report a read error if not already dead,
874 * mark it as dead then exit it
875 */
876 void
877 dead_link_on_read(struct Client *client_p, int error)
878 {
879 char errmsg[IRCD_BUFSIZE];
880 int current_error;
881
882 if (IsDefunct(client_p))
883 return;
884
885 dbuf_clear(&client_p->connection->buf_recvq);
886 dbuf_clear(&client_p->connection->buf_sendq);
887
888 current_error = get_sockerr(client_p->connection->fd.fd);
889
890 if (IsServer(client_p) || IsHandshake(client_p))
891 {
892 int connected = CurrentTime - client_p->connection->firsttime;
893
894 if (error == 0)
895 {
896 /* Admins get the real IP */
897 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
898 "Server %s closed the connection",
899 get_client_name(client_p, SHOW_IP));
900
901 /* Opers get a masked IP */
902 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
903 "Server %s closed the connection",
904 get_client_name(client_p, MASK_IP));
905
906 ilog(LOG_TYPE_IRCD, "Server %s closed the connection",
907 get_client_name(client_p, SHOW_IP));
908 }
909 else
910 {
911 report_error(L_ADMIN, "Lost connection to %s: %s",
912 get_client_name(client_p, SHOW_IP), current_error);
913 report_error(L_OPER, "Lost connection to %s: %s",
914 get_client_name(client_p, MASK_IP), current_error);
915 }
916
917 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
918 "%s was connected for %d day%s, %2d:%02d:%02d",
919 client_p->name, connected/86400,
920 (connected/86400 == 1) ? "" : "s",
921 (connected % 86400) / 3600, (connected % 3600) / 60,
922 connected % 60);
923 }
924
925 if (error == 0)
926 strlcpy(errmsg, "Remote host closed the connection",
927 sizeof(errmsg));
928 else
929 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
930 strerror(current_error));
931
932 exit_client(client_p, errmsg);
933 }
934
935 void
936 exit_aborted_clients(void)
937 {
938 dlink_node *ptr;
939 struct Client *target_p;
940 const char *notice;
941
942 DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
943 {
944 target_p = ptr->data;
945 eac_next = ptr->next;
946
947 if (target_p == NULL)
948 {
949 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
950 "Warning: null client on abort_list!");
951 dlinkDelete(ptr, &abort_list);
952 free_dlink_node(ptr);
953 continue;
954 }
955
956 dlinkDelete(ptr, &abort_list);
957
958 if (IsSendQExceeded(target_p))
959 notice = "Max SendQ exceeded";
960 else
961 notice = "Write error: connection closed";
962
963 exit_client(target_p, notice);
964 free_dlink_node(ptr);
965 }
966 }
967
968 /*
969 * accept processing, this adds a form of "caller ID" to ircd
970 *
971 * If a client puts themselves into "caller ID only" mode,
972 * only clients that match a client pointer they have put on
973 * the accept list will be allowed to message them.
974 *
975 * Diane Bruce, "Dianora" db@db.net
976 */
977
978 void
979 del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
980 {
981 dlinkDelete(&accept_p->node, &client_p->connection->acceptlist);
982
983 MyFree(accept_p->nickptr);
984 MyFree(accept_p->userptr);
985 MyFree(accept_p->hostptr);
986 MyFree(accept_p);
987 }
988
989 struct split_nuh_item *
990 find_accept(const char *nick, const char *user,
991 const char *host, struct Client *client_p,
992 int (*cmpfunc)(const char *, const char *))
993 {
994 dlink_node *node = NULL;
995
996 DLINK_FOREACH(node, client_p->connection->acceptlist.head)
997 {
998 struct split_nuh_item *accept_p = node->data;
999
1000 if (!cmpfunc(accept_p->nickptr, nick) &&
1001 !cmpfunc(accept_p->userptr, user) &&
1002 !cmpfunc(accept_p->hostptr, host))
1003 return accept_p;
1004 }
1005
1006 return NULL;
1007 }
1008
1009 /* accept_message()
1010 *
1011 * inputs - pointer to source client
1012 * - pointer to target client
1013 * output - 1 if accept this message 0 if not
1014 * side effects - See if source is on target's allow list
1015 */
1016 int
1017 accept_message(struct Client *source,
1018 struct Client *target)
1019 {
1020 dlink_node *node = NULL;
1021
1022 if (source == target || find_accept(source->name, source->username,
1023 source->host, target, match))
1024 return 1;
1025
1026 if (!HasUMode(target, UMODE_CALLERID) && HasUMode(target, UMODE_SOFTCALLERID))
1027 DLINK_FOREACH(node, target->channel.head)
1028 if (IsMember(source, ((struct Membership *)node->data)->chptr))
1029 return 1;
1030
1031 return 0;
1032 }
1033
1034 /* del_all_accepts()
1035 *
1036 * inputs - pointer to exiting client
1037 * output - NONE
1038 * side effects - Walk through given clients acceptlist and remove all entries
1039 */
1040 void
1041 del_all_accepts(struct Client *client_p)
1042 {
1043 dlink_node *node = NULL, *node_next = NULL;
1044
1045 DLINK_FOREACH_SAFE(node, node_next, client_p->connection->acceptlist.head)
1046 del_accept(node->data, client_p);
1047 }
1048
1049 unsigned int
1050 idle_time_get(const struct Client *source_p, const struct Client *target_p)
1051 {
1052 unsigned int idle = 0;
1053 unsigned int min_idle = 0;
1054 unsigned int max_idle = 0;
1055 const struct ClassItem *const class = get_class_ptr(&target_p->connection->confs);
1056
1057 if (!(class->flags & CLASS_FLAGS_FAKE_IDLE) || target_p == source_p)
1058 return CurrentTime - target_p->connection->last_privmsg;
1059
1060 if (HasUMode(source_p, UMODE_OPER) &&
1061 !(class->flags & CLASS_FLAGS_HIDE_IDLE_FROM_OPERS))
1062 return CurrentTime - target_p->connection->last_privmsg;
1063
1064 min_idle = class->min_idle;
1065 max_idle = class->max_idle;
1066
1067 if (min_idle == max_idle)
1068 return min_idle;
1069
1070 if (class->flags & CLASS_FLAGS_RANDOM_IDLE)
1071 idle = genrand_int32();
1072 else
1073 idle = CurrentTime - target_p->connection->last_privmsg;
1074
1075 if (!max_idle)
1076 idle = 0;
1077 else
1078 idle %= max_idle;
1079
1080 if (idle < min_idle)
1081 idle = min_idle + (idle % (max_idle - min_idle));
1082
1083 return idle;
1084 }
1085
1086 /* client_init()
1087 *
1088 * inputs - NONE
1089 * output - NONE
1090 * side effects - initialize client free memory
1091 */
1092 void
1093 client_init(void)
1094 {
1095 static struct event event_ping =
1096 {
1097 .name = "check_pings",
1098 .handler = check_pings,
1099 .when = 5
1100 };
1101
1102 client_pool = mp_pool_new(sizeof(struct Client), MP_CHUNK_SIZE_CLIENT);
1103 connection_pool = mp_pool_new(sizeof(struct Connection), MP_CHUNK_SIZE_CONNECTION);
1104 event_add(&event_ping, NULL);
1105 }

Properties

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