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root/svn/ircd-hybrid/trunk/src/client.c
Revision: 2691
Committed: Tue Dec 17 18:55:59 2013 UTC (10 years, 3 months ago) by michael
Content type: text/x-csrc
File size: 36199 byte(s)
Log Message:
- Avoid magically sized temporary buffers

File Contents

# User Rev Content
1 adx 30 /*
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 knight 31 * $Id$
23 adx 30 */
24    
25     #include "stdinc.h"
26 michael 1011 #include "list.h"
27 adx 30 #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 michael 1309 #include "conf.h"
40     #include "log.h"
41 adx 30 #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 michael 1654 #include "mempool.h"
49 adx 30 #include "hostmask.h"
50     #include "listener.h"
51     #include "irc_res.h"
52     #include "userhost.h"
53 michael 876 #include "watch.h"
54 michael 1783 #include "rng_mt.h"
55 michael 2682 #include "parse.h"
56 adx 30
57     dlink_list listing_client_list = { NULL, NULL, 0 };
58     /* Pointer to beginning of Client list */
59     dlink_list global_client_list = {NULL, NULL, 0};
60     /* unknown/client pointer lists */
61     dlink_list unknown_list = {NULL, NULL, 0};
62     dlink_list local_client_list = {NULL, NULL, 0};
63     dlink_list serv_list = {NULL, NULL, 0};
64     dlink_list global_serv_list = {NULL, NULL, 0};
65     dlink_list oper_list = {NULL, NULL, 0};
66    
67     static EVH check_pings;
68    
69 michael 1654 static mp_pool_t *client_pool = NULL;
70     static mp_pool_t *lclient_pool = NULL;
71 adx 30
72     static dlink_list dead_list = { NULL, NULL, 0};
73     static dlink_list abort_list = { NULL, NULL, 0};
74    
75     static dlink_node *eac_next; /* next aborted client to exit */
76    
77     static void check_pings_list(dlink_list *);
78     static void check_unknowns_list(void);
79 michael 1632 static void ban_them(struct Client *, struct MaskItem *);
80 adx 30
81    
82 michael 1798 /* client_init()
83 adx 30 *
84     * inputs - NONE
85     * output - NONE
86     * side effects - initialize client free memory
87     */
88     void
89 michael 1798 client_init(void)
90 adx 30 {
91     /* start off the check ping event .. -- adrian
92     * Every 30 seconds is plenty -- db
93     */
94 michael 1654 client_pool = mp_pool_new(sizeof(struct Client), MP_CHUNK_SIZE_CLIENT);
95     lclient_pool = mp_pool_new(sizeof(struct LocalUser), MP_CHUNK_SIZE_LCLIENT);
96 adx 30 eventAdd("check_pings", check_pings, NULL, 5);
97     }
98    
99     /*
100     * make_client - create a new Client struct and set it to initial state.
101     *
102     * from == NULL, create local client (a client connected
103     * to a socket).
104     * WARNING: This leaves the client in a dangerous
105     * state where fd == -1, dead flag is not set and
106     * the client is on the unknown_list; therefore,
107     * the first thing to do after calling make_client(NULL)
108     * is setting fd to something reasonable. -adx
109     *
110     * from, create remote client (behind a socket
111     * associated with the client defined by
112     * 'from'). ('from' is a local client!!).
113     */
114     struct Client *
115     make_client(struct Client *from)
116     {
117 michael 1654 struct Client *client_p = mp_pool_get(client_pool);
118 adx 30
119 michael 1654 memset(client_p, 0, sizeof(*client_p));
120    
121 adx 30 if (from == NULL)
122     {
123 michael 1241 client_p->from = client_p; /* 'from' of local client is self! */
124 michael 1654 client_p->localClient = mp_pool_get(lclient_pool);
125    
126     memset(client_p->localClient, 0, sizeof(*client_p->localClient));
127    
128 michael 1241 client_p->localClient->since = CurrentTime;
129     client_p->localClient->lasttime = CurrentTime;
130     client_p->localClient->firsttime = CurrentTime;
131     client_p->localClient->registration = REG_INIT;
132 adx 30
133     /* as good a place as any... */
134 michael 1126 dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list);
135 adx 30 }
136     else
137     client_p->from = from; /* 'from' of local client is self! */
138    
139 michael 1360 client_p->idhnext = client_p;
140 adx 30 client_p->hnext = client_p;
141 michael 2678 SetUnknown(client_p);
142 adx 30 strcpy(client_p->username, "unknown");
143 michael 1559 strcpy(client_p->svid, "0");
144 adx 30
145     return client_p;
146     }
147    
148     /*
149     * free_client
150     *
151     * inputs - pointer to client
152     * output - NONE
153     * side effects - client pointed to has its memory freed
154     */
155     static void
156     free_client(struct Client *client_p)
157     {
158     assert(client_p != NULL);
159     assert(client_p != &me);
160     assert(client_p->hnext == client_p);
161 michael 1360 assert(client_p->idhnext == client_p);
162 adx 30 assert(client_p->channel.head == NULL);
163     assert(dlink_list_length(&client_p->channel) == 0);
164 michael 1360 assert(dlink_list_length(&client_p->whowas) == 0);
165 michael 1667 assert(!IsServer(client_p) || (IsServer(client_p) && client_p->serv));
166 adx 30
167     MyFree(client_p->serv);
168 michael 2229 MyFree(client_p->certfp);
169 adx 30
170     if (MyConnect(client_p))
171     {
172 michael 317 assert(client_p->localClient->invited.head == NULL);
173     assert(dlink_list_length(&client_p->localClient->invited) == 0);
174 michael 2345 assert(dlink_list_length(&client_p->localClient->watches) == 0);
175 adx 30 assert(IsClosing(client_p) && IsDead(client_p));
176    
177     MyFree(client_p->localClient->response);
178     MyFree(client_p->localClient->auth_oper);
179    
180     /*
181     * clean up extra sockets from P-lines which have been discarded.
182     */
183     if (client_p->localClient->listener)
184     {
185     assert(0 < client_p->localClient->listener->ref_count);
186     if (0 == --client_p->localClient->listener->ref_count &&
187 michael 2345 !client_p->localClient->listener->active)
188 adx 30 free_listener(client_p->localClient->listener);
189     }
190    
191     dbuf_clear(&client_p->localClient->buf_recvq);
192     dbuf_clear(&client_p->localClient->buf_sendq);
193    
194 michael 1654 mp_pool_release(client_p->localClient);
195 adx 30 }
196    
197 michael 1654 mp_pool_release(client_p);
198 adx 30 }
199    
200     /*
201     * check_pings - go through the local client list and check activity
202     * kill off stuff that should die
203     *
204     * inputs - NOT USED (from event)
205     * output - next time_t when check_pings() should be called again
206 michael 2345 * side effects -
207 adx 30 *
208     *
209     * A PING can be sent to clients as necessary.
210     *
211     * Client/Server ping outs are handled.
212     */
213    
214     /*
215     * Addon from adrian. We used to call this after nextping seconds,
216     * however I've changed it to run once a second. This is only for
217     * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
218     * run once a second makes life a lot easier - when a new client connects
219     * and they need a ping in 4 seconds, if nextping was set to 20 seconds
220     * we end up waiting 20 seconds. This is stupid. :-)
221     * I will optimise (hah!) check_pings() once I've finished working on
222     * tidying up other network IO evilnesses.
223     * -- adrian
224     */
225    
226     static void
227     check_pings(void *notused)
228 michael 2345 {
229 adx 30 check_pings_list(&local_client_list);
230     check_pings_list(&serv_list);
231     check_unknowns_list();
232     }
233    
234     /* check_pings_list()
235     *
236     * inputs - pointer to list to check
237     * output - NONE
238 michael 2345 * side effects -
239 adx 30 */
240     static void
241     check_pings_list(dlink_list *list)
242     {
243 michael 2691 char scratch[IRCD_BUFSIZE];
244 michael 1644 int ping = 0; /* ping time value from client */
245     dlink_node *ptr = NULL, *next_ptr = NULL;
246 adx 30
247     DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
248     {
249 michael 1644 struct Client *client_p = ptr->data;
250 adx 30
251     /*
252     ** Note: No need to notify opers here. It's
253     ** already done when "FLAGS_DEADSOCKET" is set.
254     */
255     if (IsDead(client_p))
256     {
257     /* Ignore it, its been exited already */
258 michael 2345 continue;
259 adx 30 }
260    
261     if (!IsRegistered(client_p))
262 michael 1644 ping = CONNECTTIMEOUT;
263 adx 30 else
264 michael 1644 ping = get_client_ping(&client_p->localClient->confs);
265 adx 30
266 michael 1241 if (ping < CurrentTime - client_p->localClient->lasttime)
267 adx 30 {
268     if (!IsPingSent(client_p))
269     {
270 michael 2182 /*
271     * if we havent PINGed the connection and we havent
272     * heard from it in a while, PING it to make sure
273     * it is still alive.
274     */
275     SetPingSent(client_p);
276     client_p->localClient->lasttime = CurrentTime - ping;
277     sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
278 adx 30 }
279     else
280     {
281 michael 1241 if (CurrentTime - client_p->localClient->lasttime >= 2 * ping)
282 adx 30 {
283     /*
284     * If the client/server hasn't talked to us in 2*ping seconds
285     * and it has a ping time, then close its connection.
286     */
287     if (IsServer(client_p) || IsHandshake(client_p))
288 michael 2182 {
289     sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
290     "No response from %s, closing link",
291     get_client_name(client_p, HIDE_IP));
292     sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
293     "No response from %s, closing link",
294     get_client_name(client_p, MASK_IP));
295     ilog(LOG_TYPE_IRCD, "No response from %s, closing link",
296     get_client_name(client_p, HIDE_IP));
297     }
298 michael 650
299 michael 1124 snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds",
300 michael 1241 (int)(CurrentTime - client_p->localClient->lasttime));
301 adx 30 exit_client(client_p, &me, scratch);
302     }
303     }
304     }
305     }
306     }
307    
308     /* check_unknowns_list()
309     *
310     * inputs - pointer to list of unknown clients
311     * output - NONE
312     * side effects - unknown clients get marked for termination after n seconds
313     */
314     static void
315     check_unknowns_list(void)
316     {
317     dlink_node *ptr, *next_ptr;
318    
319     DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
320     {
321     struct Client *client_p = ptr->data;
322    
323 michael 650 /*
324     * Check UNKNOWN connections - if they have been in this state
325 adx 30 * for > 30s, close them.
326     */
327 michael 1241 if (IsAuthFinished(client_p) && (CurrentTime - client_p->localClient->firsttime) > 30)
328 michael 650 exit_client(client_p, &me, "Registration timed out");
329 adx 30 }
330     }
331    
332     /* check_conf_klines()
333     *
334     * inputs - NONE
335     * output - NONE
336     * side effects - Check all connections for a pending kline against the
337     * client, exit the client if a kline matches.
338     */
339 michael 2345 void
340 adx 30 check_conf_klines(void)
341 michael 2345 {
342 adx 30 struct Client *client_p = NULL; /* current local client_p being examined */
343 michael 1632 struct MaskItem *conf = NULL;
344 adx 30 dlink_node *ptr, *next_ptr;
345    
346     DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
347     {
348     client_p = ptr->data;
349    
350     /* If a client is already being exited
351     */
352     if (IsDead(client_p) || !IsClient(client_p))
353     continue;
354    
355 michael 1632 if ((conf = find_dline_conf(&client_p->localClient->ip,
356 adx 30 client_p->localClient->aftype)) != NULL)
357     {
358 michael 1636 if (conf->type == CONF_EXEMPT)
359 michael 2182 continue;
360 adx 30
361     ban_them(client_p, conf);
362     continue; /* and go examine next fd/client_p */
363     }
364    
365 michael 2522 if (ConfigFileEntry.glines)
366 adx 30 {
367 michael 2522 if (!(conf = find_conf_by_address(client_p->host, &client_p->localClient->ip,
368     CONF_GLINE, client_p->localClient->aftype,
369     client_p->username, NULL, 1)))
370     continue;
371    
372 adx 30 if (IsExemptKline(client_p) ||
373     IsExemptGline(client_p))
374     {
375 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
376 adx 30 "GLINE over-ruled for %s, client is %sline_exempt",
377     get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
378     continue;
379     }
380    
381     ban_them(client_p, conf);
382 michael 2345 /* and go examine next fd/client_p */
383 adx 30 continue;
384 michael 2345 }
385 adx 30
386 michael 2522 if ((conf = find_conf_by_address(client_p->host, &client_p->localClient->ip,
387     CONF_KLINE, client_p->localClient->aftype,
388     client_p->username, NULL, 1)) != NULL)
389 adx 30 {
390     if (IsExemptKline(client_p))
391     {
392 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
393 adx 30 "KLINE over-ruled for %s, client is kline_exempt",
394     get_client_name(client_p, HIDE_IP));
395     continue;
396     }
397    
398     ban_them(client_p, conf);
399 michael 2345 continue;
400 adx 30 }
401    
402 michael 1632 if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info,
403 michael 1921 NULL, NULL, 0)))
404 adx 30 {
405     ban_them(client_p, conf);
406     continue;
407     }
408     }
409    
410     /* also check the unknowns list for new dlines */
411     DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
412     {
413     client_p = ptr->data;
414    
415 michael 1632 if ((conf = find_dline_conf(&client_p->localClient->ip,
416     client_p->localClient->aftype)))
417 adx 30 {
418 michael 1636 if (conf->type == CONF_EXEMPT)
419 adx 30 continue;
420    
421     exit_client(client_p, &me, "D-lined");
422     }
423     }
424     }
425    
426     /*
427     * ban_them
428     *
429     * inputs - pointer to client to ban
430 michael 1632 * - pointer to MaskItem
431 adx 30 * output - NONE
432     * side effects - given client_p is banned
433     */
434     static void
435 michael 1632 ban_them(struct Client *client_p, struct MaskItem *conf)
436 adx 30 {
437 michael 2182 const char *user_reason = NULL; /* What is sent to user */
438 adx 30 const char *type_string = NULL;
439     const char dline_string[] = "D-line";
440     const char kline_string[] = "K-line";
441     const char gline_string[] = "G-line";
442     const char xline_string[] = "X-line";
443    
444     switch (conf->type)
445     {
446 michael 1632 case CONF_KLINE:
447 adx 30 type_string = kline_string;
448     break;
449 michael 1632 case CONF_DLINE:
450 adx 30 type_string = dline_string;
451     break;
452 michael 1632 case CONF_GLINE:
453 adx 30 type_string = gline_string;
454     break;
455 michael 1632 case CONF_XLINE:
456 adx 30 type_string = xline_string;
457 michael 1632 ++conf->count;
458 adx 30 break;
459     default:
460     assert(0);
461     break;
462     }
463    
464 michael 1632 user_reason = conf->reason ? conf->reason : type_string;
465 adx 30
466 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s",
467 adx 30 type_string, get_client_name(client_p, HIDE_IP));
468    
469     if (IsClient(client_p))
470 michael 1834 sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
471 michael 2182 me.name, client_p->name, user_reason);
472 adx 30
473 michael 1549 exit_client(client_p, &me, user_reason);
474 adx 30 }
475    
476     /* update_client_exit_stats()
477     *
478     * input - pointer to client
479     * output - NONE
480 michael 2345 * side effects -
481 adx 30 */
482     static void
483     update_client_exit_stats(struct Client *client_p)
484     {
485 michael 1143 if (IsClient(client_p))
486 adx 30 {
487 michael 1013 assert(Count.total > 0);
488 adx 30 --Count.total;
489 michael 1219 if (HasUMode(client_p, UMODE_OPER))
490 adx 30 --Count.oper;
491 michael 1219 if (HasUMode(client_p, UMODE_INVISIBLE))
492 adx 30 --Count.invisi;
493     }
494 michael 1143 else if (IsServer(client_p))
495 michael 1618 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE,
496     "Server %s split from %s",
497 michael 1143 client_p->name, client_p->servptr->name);
498 adx 30
499     if (splitchecking && !splitmode)
500     check_splitmode(NULL);
501     }
502    
503     /* find_person()
504     *
505     * inputs - pointer to name
506     * output - return client pointer
507     * side effects - find person by (nick)name
508     */
509     struct Client *
510     find_person(const struct Client *client_p, const char *name)
511     {
512 michael 2475 struct Client *target_p = NULL;
513 adx 30
514     if (IsDigit(*name))
515     {
516 michael 2586 if (IsServer(client_p) || HasFlag(client_p, FLAGS_SERVICE))
517     target_p = hash_find_id(name);
518 adx 30 }
519     else
520 michael 2475 target_p = hash_find_client(name);
521 adx 30
522 michael 2475 return (target_p && IsClient(target_p)) ? target_p : NULL;
523 adx 30 }
524    
525     /*
526 michael 2475 * find_chasing - find the client structure for a nick name (name)
527 michael 2345 * using history mechanism if necessary. If the client is not found,
528 adx 30 * an error message (NO SUCH NICK) is generated. If the client was found
529     * through the history, chasing will be 1 and otherwise 0.
530     */
531     struct Client *
532 michael 2475 find_chasing(struct Client *source_p, const char *name, int *const chasing)
533 adx 30 {
534 michael 2475 struct Client *who = find_person(source_p->from, name);
535 adx 30
536     if (chasing)
537     *chasing = 0;
538    
539     if (who)
540 michael 1169 return who;
541 adx 30
542 michael 2475 if (IsDigit(*name))
543 michael 1169 return NULL;
544 adx 30
545 michael 2475 if ((who = whowas_get_history(name,
546 michael 2182 (time_t)ConfigFileEntry.kill_chase_time_limit))
547     == NULL)
548 adx 30 {
549 michael 1834 sendto_one(source_p, form_str(ERR_NOSUCHNICK),
550 michael 2475 me.name, source_p->name, name);
551 michael 1169 return NULL;
552 adx 30 }
553    
554     if (chasing)
555     *chasing = 1;
556    
557 michael 1169 return who;
558 adx 30 }
559    
560     /*
561     * get_client_name - Return the name of the client
562     * for various tracking and
563     * admin purposes. The main purpose of this function is to
564     * return the "socket host" name of the client, if that
565     * differs from the advertised name (other than case).
566     * But, this can be used to any client structure.
567     *
568     * NOTE 1:
569     * Watch out the allocation of "nbuf", if either source_p->name
570     * or source_p->sockhost gets changed into pointers instead of
571     * directly allocated within the structure...
572     *
573     * NOTE 2:
574     * Function return either a pointer to the structure (source_p) or
575     * to internal buffer (nbuf). *NEVER* use the returned pointer
576     * to modify what it points!!!
577     */
578     const char *
579 michael 1328 get_client_name(const struct Client *client, enum addr_mask_type type)
580 adx 30 {
581     static char nbuf[HOSTLEN * 2 + USERLEN + 5];
582    
583     assert(client != NULL);
584    
585 michael 2345 if (!MyConnect(client))
586 michael 1124 return client->name;
587 adx 30
588 michael 1340 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
589     {
590     if (!irccmp(client->name, client->host))
591     return client->name;
592     else if (ConfigServerHide.hide_server_ips)
593 michael 1328 type = MASK_IP;
594 michael 1340 }
595 adx 30
596     if (ConfigFileEntry.hide_spoof_ips)
597 michael 1328 if (type == SHOW_IP && IsIPSpoof(client))
598     type = MASK_IP;
599 adx 30
600     /* And finally, let's get the host information, ip or name */
601 michael 1328 switch (type)
602 adx 30 {
603     case SHOW_IP:
604 michael 1339 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
605     client->name,
606     client->username, client->sockhost);
607     break;
608 adx 30 case MASK_IP:
609 michael 1339 if (client->localClient->aftype == AF_INET)
610     snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
611     client->name, client->username);
612     else
613     snprintf(nbuf, sizeof(nbuf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]",
614     client->name, client->username);
615 adx 30 break;
616     default:
617 michael 1124 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
618     client->name,
619     client->username, client->host);
620 adx 30 }
621    
622 michael 1124 return nbuf;
623 adx 30 }
624    
625     void
626     free_exited_clients(void)
627     {
628 michael 887 dlink_node *ptr = NULL, *next = NULL;
629 michael 2345
630 adx 30 DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
631     {
632 michael 887 free_client(ptr->data);
633 adx 30 dlinkDelete(ptr, &dead_list);
634     free_dlink_node(ptr);
635     }
636     }
637    
638     /*
639     * Exit one client, local or remote. Assuming all dependents have
640     * been already removed, and socket closed for local client.
641     *
642     * The only messages generated are QUITs on channels.
643     */
644     static void
645     exit_one_client(struct Client *source_p, const char *quitmsg)
646     {
647     dlink_node *lp = NULL, *next_lp = NULL;
648    
649     assert(!IsMe(source_p));
650    
651 michael 1118 if (IsClient(source_p))
652 adx 30 {
653     if (source_p->servptr->serv != NULL)
654 michael 889 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
655 adx 30
656 michael 1118 /*
657     * If a person is on a channel, send a QUIT notice
658     * to every client (person) on the same channel (so
659     * that the client can show the "**signoff" message).
660     * (Note: The notice is to the local clients *only*)
661     */
662 michael 1734 sendto_common_channels_local(source_p, 0, 0, ":%s!%s@%s QUIT :%s",
663 adx 30 source_p->name, source_p->username,
664     source_p->host, quitmsg);
665     DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
666     remove_user_from_channel(lp->data);
667    
668 michael 2300 whowas_add_history(source_p, 0);
669     whowas_off_history(source_p);
670 adx 30
671 michael 876 watch_check_hash(source_p, RPL_LOGOFF);
672    
673 michael 889 if (MyConnect(source_p))
674 adx 30 {
675 michael 317 /* Clean up invitefield */
676     DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
677     del_invite(lp->data, source_p);
678 michael 887
679     del_all_accepts(source_p);
680 michael 317 }
681 adx 30 }
682 michael 1118 else if (IsServer(source_p))
683     {
684     dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
685 adx 30
686 michael 1118 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
687     free_dlink_node(lp);
688     }
689    
690 adx 30 /* Remove source_p from the client lists */
691     if (HasID(source_p))
692     hash_del_id(source_p);
693     if (source_p->name[0])
694     hash_del_client(source_p);
695    
696     if (IsUserHostIp(source_p))
697     delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
698    
699     /* remove from global client list
700     * NOTE: source_p->node.next cannot be NULL if the client is added
701     * to global_client_list (there is always &me at its end)
702     */
703     if (source_p != NULL && source_p->node.next != NULL)
704     dlinkDelete(&source_p->node, &global_client_list);
705    
706     update_client_exit_stats(source_p);
707    
708     /* Check to see if the client isn't already on the dead list */
709     assert(dlinkFind(&dead_list, source_p) == NULL);
710    
711     /* add to dead client dlist */
712     SetDead(source_p);
713     dlinkAdd(source_p, make_dlink_node(), &dead_list);
714     }
715    
716     /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
717     * and servers to those servers that need them. A server needs the client
718     * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
719     * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
720     * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
721     * on that one -orabidoo
722     *
723     * This is now called on each local server -adx
724     */
725     static void
726     recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
727     struct Client *from, struct Client *to, const char *comment,
728 michael 1118 const char *splitstr)
729 adx 30 {
730     dlink_node *ptr, *next;
731     struct Client *target_p;
732    
733     assert(to != source_p); /* should be already removed from serv_list */
734    
735     /* If this server can handle quit storm (QS) removal
736     * of dependents, just send the SQUIT
737     */
738 michael 1529 if (!IsCapable(to, CAP_QS))
739 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
740 adx 30 {
741     target_p = ptr->data;
742     sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
743     }
744    
745 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
746 adx 30 recurse_send_quits(original_source_p, ptr->data, from, to,
747 michael 1118 comment, splitstr);
748 adx 30
749 michael 1529 if ((source_p == original_source_p && to != from) ||
750     !IsCapable(to, CAP_QS))
751 adx 30 {
752     /* don't use a prefix here - we have to be 100% sure the message
753     * will be accepted without Unknown prefix etc.. */
754     sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
755     }
756     }
757    
758 michael 2345 /*
759 adx 30 * Remove all clients that depend on source_p; assumes all (S)QUITs have
760 michael 2345 * already been sent. we make sure to exit a server's dependent clients
761     * and servers before the server itself; exit_one_client takes care of
762 adx 30 * actually removing things off llists. tweaked from +CSr31 -orabidoo
763     */
764     static void
765     recurse_remove_clients(struct Client *source_p, const char *quitmsg)
766     {
767     dlink_node *ptr, *next;
768    
769 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
770 adx 30 exit_one_client(ptr->data, quitmsg);
771    
772 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
773 adx 30 {
774     recurse_remove_clients(ptr->data, quitmsg);
775     exit_one_client(ptr->data, quitmsg);
776     }
777     }
778    
779     /*
780     ** Remove *everything* that depends on source_p, from all lists, and sending
781     ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
782     ** and its SQUITs have been sent except for the upstream one -orabidoo
783     */
784     static void
785     remove_dependents(struct Client *source_p, struct Client *from,
786     const char *comment, const char *splitstr)
787     {
788 michael 1118 dlink_node *ptr = NULL;
789 adx 30
790     DLINK_FOREACH(ptr, serv_list.head)
791 michael 1118 recurse_send_quits(source_p, source_p, from, ptr->data,
792     comment, splitstr);
793 adx 30
794     recurse_remove_clients(source_p, splitstr);
795     }
796    
797     /*
798     * exit_client - exit a client of any type. Generally, you can use
799     * this on any struct Client, regardless of its state.
800     *
801     * Note, you shouldn't exit remote _users_ without first doing
802 michael 1219 * AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message.
803     * However, it is perfectly correct to call exit_client to force a _server_
804 adx 30 * quit (either local or remote one).
805     *
806     * inputs: - a client pointer that is going to be exited
807     * - for servers, the second argument is a pointer to who
808     * is firing the server. This side won't get any generated
809     * messages. NEVER NULL!
810     * output: none
811     * side effects: the client is delinked from all lists, disconnected,
812     * and the rest of IRC network is notified of the exit.
813     * Client memory is scheduled to be freed
814     */
815     void
816     exit_client(struct Client *source_p, struct Client *from, const char *comment)
817     {
818 michael 1118 dlink_node *m = NULL;
819 adx 30
820     if (MyConnect(source_p))
821     {
822     /* DO NOT REMOVE. exit_client can be called twice after a failed
823     * read/write.
824     */
825     if (IsClosing(source_p))
826     return;
827    
828     SetClosing(source_p);
829    
830     if (IsIpHash(source_p))
831     remove_one_ip(&source_p->localClient->ip);
832    
833 michael 2181 delete_auth(&source_p->localClient->auth);
834 adx 30
835 michael 1571 /*
836     * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
837 adx 30 * STAT_HANDSHAKE or STAT_UNKNOWN
838     * all of which are lumped together into unknown_list
839     *
840     * In all above cases IsRegistered() will not be true.
841     */
842     if (!IsRegistered(source_p))
843     {
844 michael 1126 assert(dlinkFind(&unknown_list, source_p));
845    
846     dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
847 adx 30 }
848     else if (IsClient(source_p))
849     {
850 michael 1247 time_t on_for = CurrentTime - source_p->localClient->firsttime;
851 michael 1013 assert(Count.local > 0);
852 adx 30 Count.local--;
853    
854 michael 1219 if (HasUMode(source_p, UMODE_OPER))
855 adx 30 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
856     free_dlink_node(m);
857    
858 michael 1126 assert(dlinkFind(&local_client_list, source_p));
859 adx 30 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
860 michael 1126
861 adx 30 if (source_p->localClient->list_task != NULL)
862     free_list_task(source_p->localClient->list_task, source_p);
863    
864 michael 876 watch_del_watch_list(source_p);
865 michael 1618 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
866     "Client exiting: %s (%s@%s) [%s] [%s]",
867 adx 30 source_p->name, source_p->username, source_p->host, comment,
868     ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
869     "255.255.255.255" : source_p->sockhost);
870 michael 1247 ilog(LOG_TYPE_USER, "%s (%3u:%02u:%02u): %s!%s@%s %llu/%llu",
871     myctime(source_p->localClient->firsttime), (unsigned int)(on_for / 3600),
872     (unsigned int)((on_for % 3600)/60), (unsigned int)(on_for % 60),
873     source_p->name, source_p->username, source_p->host,
874     source_p->localClient->send.bytes>>10,
875     source_p->localClient->recv.bytes>>10);
876 adx 30 }
877 michael 1571 else if (IsServer(source_p))
878 adx 30 {
879 michael 1571 assert(Count.myserver > 0);
880     --Count.myserver;
881 adx 30
882 michael 1571 assert(dlinkFind(&serv_list, source_p));
883     dlinkDelete(&source_p->localClient->lclient_node, &serv_list);
884     unset_chcap_usage_counts(source_p);
885 adx 30 }
886    
887     if (!IsDead(source_p))
888     {
889     if (IsServer(source_p))
890     {
891     /* for them, we are exiting the network */
892     sendto_one(source_p, ":%s SQUIT %s :%s",
893 michael 2182 ID_or_name(from, source_p), me.name, comment);
894 adx 30 }
895    
896     sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
897     source_p->host, comment);
898     }
899    
900     /*
901     ** Currently only server connections can have
902     ** depending remote clients here, but it does no
903     ** harm to check for all local clients. In
904     ** future some other clients than servers might
905     ** have remotes too...
906     **
907     ** Close the Client connection first and mark it
908     ** so that no messages are attempted to send to it.
909     ** Remember it makes source_p->from == NULL.
910     */
911     close_connection(source_p);
912     }
913 michael 1991 else if (IsClient(source_p) && HasFlag(source_p->servptr, FLAGS_EOB))
914 michael 1976 sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE,
915     "Client exiting at %s: %s (%s@%s) [%s]",
916     source_p->servptr->name, source_p->name,
917     source_p->username, source_p->host, comment);
918 adx 30
919     if (IsServer(source_p))
920     {
921     char splitstr[HOSTLEN + HOSTLEN + 2];
922    
923     /* This shouldn't ever happen */
924     assert(source_p->serv != NULL && source_p->servptr != NULL);
925    
926     if (ConfigServerHide.hide_servers)
927 michael 887 /*
928 michael 2345 * Set netsplit message to "*.net *.split" to still show
929 adx 30 * that its a split, but hide the servers splitting
930     */
931     strcpy(splitstr, "*.net *.split");
932     else
933     snprintf(splitstr, sizeof(splitstr), "%s %s",
934     source_p->servptr->name, source_p->name);
935    
936     remove_dependents(source_p, from->from, comment, splitstr);
937    
938     if (source_p->servptr == &me)
939     {
940 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
941 adx 30 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
942 michael 1241 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
943 adx 30 source_p->localClient->send.bytes >> 10,
944     source_p->localClient->recv.bytes >> 10);
945 michael 1247 ilog(LOG_TYPE_IRCD, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
946 michael 2345 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
947 adx 30 source_p->localClient->send.bytes >> 10,
948     source_p->localClient->recv.bytes >> 10);
949     }
950     }
951 michael 1219 else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED))
952 adx 30 {
953 michael 1474 sendto_server(from->from, CAP_TS6, NOCAPS,
954 adx 30 ":%s QUIT :%s", ID(source_p), comment);
955 michael 1474 sendto_server(from->from, NOCAPS, CAP_TS6,
956 adx 30 ":%s QUIT :%s", source_p->name, comment);
957     }
958    
959     /* The client *better* be off all of the lists */
960     assert(dlinkFind(&unknown_list, source_p) == NULL);
961     assert(dlinkFind(&local_client_list, source_p) == NULL);
962     assert(dlinkFind(&serv_list, source_p) == NULL);
963     assert(dlinkFind(&oper_list, source_p) == NULL);
964    
965     exit_one_client(source_p, comment);
966     }
967    
968     /*
969     * dead_link_on_write - report a write error if not already dead,
970     * mark it as dead then exit it
971     */
972     void
973     dead_link_on_write(struct Client *client_p, int ierrno)
974     {
975     dlink_node *ptr;
976    
977     if (IsDefunct(client_p))
978     return;
979    
980     dbuf_clear(&client_p->localClient->buf_recvq);
981     dbuf_clear(&client_p->localClient->buf_sendq);
982    
983     assert(dlinkFind(&abort_list, client_p) == NULL);
984     ptr = make_dlink_node();
985     /* don't let exit_aborted_clients() finish yet */
986     dlinkAddTail(client_p, ptr, &abort_list);
987    
988     if (eac_next == NULL)
989     eac_next = ptr;
990    
991     SetDead(client_p); /* You are dead my friend */
992     }
993    
994     /*
995     * dead_link_on_read - report a read error if not already dead,
996     * mark it as dead then exit it
997     */
998     void
999     dead_link_on_read(struct Client *client_p, int error)
1000     {
1001 michael 2691 char errmsg[IRCD_BUFSIZE];
1002 adx 30 int current_error;
1003    
1004     if (IsDefunct(client_p))
1005     return;
1006    
1007     dbuf_clear(&client_p->localClient->buf_recvq);
1008     dbuf_clear(&client_p->localClient->buf_sendq);
1009    
1010     current_error = get_sockerr(client_p->localClient->fd.fd);
1011    
1012     if (IsServer(client_p) || IsHandshake(client_p))
1013     {
1014 michael 1241 int connected = CurrentTime - client_p->localClient->firsttime;
1015 michael 2345
1016 adx 30 if (error == 0)
1017     {
1018     /* Admins get the real IP */
1019 michael 1618 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
1020 michael 2182 "Server %s closed the connection",
1021     get_client_name(client_p, SHOW_IP));
1022 adx 30
1023     /* Opers get a masked IP */
1024 michael 1618 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
1025 michael 2182 "Server %s closed the connection",
1026     get_client_name(client_p, MASK_IP));
1027 adx 30
1028 michael 1247 ilog(LOG_TYPE_IRCD, "Server %s closed the connection",
1029 michael 2182 get_client_name(client_p, SHOW_IP));
1030 adx 30 }
1031     else
1032     {
1033 michael 617 report_error(L_ADMIN, "Lost connection to %s: %s",
1034 michael 2182 get_client_name(client_p, SHOW_IP), current_error);
1035 michael 617 report_error(L_OPER, "Lost connection to %s: %s",
1036 michael 2182 get_client_name(client_p, MASK_IP), current_error);
1037 adx 30 }
1038    
1039 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1040 michael 2182 "%s had been connected for %d day%s, %2d:%02d:%02d",
1041     client_p->name, connected/86400,
1042     (connected/86400 == 1) ? "" : "s",
1043     (connected % 86400) / 3600, (connected % 3600) / 60,
1044     connected % 60);
1045 adx 30 }
1046    
1047     if (error == 0)
1048     strlcpy(errmsg, "Remote host closed the connection",
1049     sizeof(errmsg));
1050     else
1051 michael 1124 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
1052     strerror(current_error));
1053 adx 30
1054     exit_client(client_p, &me, errmsg);
1055     }
1056    
1057     void
1058     exit_aborted_clients(void)
1059     {
1060     dlink_node *ptr;
1061     struct Client *target_p;
1062     const char *notice;
1063    
1064     DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1065     {
1066     target_p = ptr->data;
1067     eac_next = ptr->next;
1068    
1069     if (target_p == NULL)
1070     {
1071 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1072 adx 30 "Warning: null client on abort_list!");
1073     dlinkDelete(ptr, &abort_list);
1074     free_dlink_node(ptr);
1075     continue;
1076     }
1077    
1078     dlinkDelete(ptr, &abort_list);
1079    
1080     if (IsSendQExceeded(target_p))
1081     notice = "Max SendQ exceeded";
1082     else
1083     notice = "Write error: connection closed";
1084    
1085 michael 2345 exit_client(target_p, &me, notice);
1086 adx 30 free_dlink_node(ptr);
1087     }
1088     }
1089    
1090     /*
1091     * accept processing, this adds a form of "caller ID" to ircd
1092 michael 887 *
1093 adx 30 * If a client puts themselves into "caller ID only" mode,
1094 michael 887 * only clients that match a client pointer they have put on
1095 adx 30 * the accept list will be allowed to message them.
1096     *
1097 michael 887 * Diane Bruce, "Dianora" db@db.net
1098 adx 30 */
1099    
1100 michael 887 void
1101     del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
1102 adx 30 {
1103 michael 887 dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist);
1104 adx 30
1105 michael 887 MyFree(accept_p->nickptr);
1106     MyFree(accept_p->userptr);
1107     MyFree(accept_p->hostptr);
1108     MyFree(accept_p);
1109     }
1110 adx 30
1111 michael 887 struct split_nuh_item *
1112     find_accept(const char *nick, const char *user,
1113 michael 2363 const char *host, struct Client *client_p,
1114     int (*cmpfunc)(const char *, const char *))
1115 michael 887 {
1116     dlink_node *ptr = NULL;
1117 adx 30
1118 michael 887 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1119 adx 30 {
1120 michael 887 struct split_nuh_item *accept_p = ptr->data;
1121    
1122 michael 1652 if (!cmpfunc(accept_p->nickptr, nick) &&
1123     !cmpfunc(accept_p->userptr, user) &&
1124     !cmpfunc(accept_p->hostptr, host))
1125 michael 887 return accept_p;
1126 adx 30 }
1127    
1128 michael 887 return NULL;
1129 adx 30 }
1130    
1131 michael 887 /* accept_message()
1132 adx 30 *
1133 michael 887 * inputs - pointer to source client
1134     * - pointer to target client
1135     * output - 1 if accept this message 0 if not
1136     * side effects - See if source is on target's allow list
1137 adx 30 */
1138 michael 887 int
1139     accept_message(struct Client *source,
1140     struct Client *target)
1141 adx 30 {
1142 michael 887 dlink_node *ptr = NULL;
1143 adx 30
1144 michael 887 if (source == target || find_accept(source->name, source->username,
1145 michael 2363 source->host, target, match))
1146 michael 887 return 1;
1147 adx 30
1148 michael 1219 if (HasUMode(target, UMODE_SOFTCALLERID))
1149 michael 887 DLINK_FOREACH(ptr, target->channel.head)
1150     if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1151     return 1;
1152 adx 30
1153 michael 887 return 0;
1154 adx 30 }
1155    
1156     /* del_all_accepts()
1157     *
1158 michael 887 * inputs - pointer to exiting client
1159     * output - NONE
1160     * side effects - Walk through given clients acceptlist and remove all entries
1161 adx 30 */
1162     void
1163     del_all_accepts(struct Client *client_p)
1164     {
1165 michael 887 dlink_node *ptr = NULL, *next_ptr = NULL;
1166 adx 30
1167 michael 887 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1168     del_accept(ptr->data, client_p);
1169 adx 30 }
1170 michael 1783
1171     unsigned int
1172     idle_time_get(const struct Client *source_p, const struct Client *target_p)
1173     {
1174     unsigned int idle = 0;
1175     unsigned int min_idle = 0;
1176     unsigned int max_idle = 0;
1177 michael 1847 const struct ClassItem *class = get_class_ptr(&target_p->localClient->confs);
1178 michael 1783
1179 michael 1785 if (!(class->flags & CLASS_FLAGS_FAKE_IDLE) || target_p == source_p)
1180 michael 1783 return CurrentTime - target_p->localClient->last_privmsg;
1181     if (HasUMode(source_p, UMODE_OPER) &&
1182 michael 1785 !(class->flags & CLASS_FLAGS_HIDE_IDLE_FROM_OPERS))
1183 michael 1783 return CurrentTime - target_p->localClient->last_privmsg;
1184    
1185     min_idle = class->min_idle;
1186     max_idle = class->max_idle;
1187    
1188     if (min_idle == max_idle)
1189     return min_idle;
1190    
1191     if (class->flags & CLASS_FLAGS_RANDOM_IDLE)
1192     idle = genrand_int32();
1193     else
1194     idle = CurrentTime - target_p->localClient->last_privmsg;
1195    
1196     if (max_idle == 0)
1197     idle = 0;
1198     else
1199     idle %= max_idle;
1200    
1201     if (idle < min_idle)
1202     idle = min_idle + (idle % (max_idle - min_idle));
1203    
1204     return idle;
1205     }

Properties

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