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root/svn/branches/newio/src/client.c
Revision: 1644
Committed: Tue Nov 6 22:20:16 2012 UTC (11 years, 4 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid/trunk/src/client.c
File size: 34866 byte(s)
Log Message:
- More config subsystem cleanups

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     #include "hostmask.h"
49     #include "balloc.h"
50     #include "listener.h"
51     #include "irc_res.h"
52     #include "userhost.h"
53 michael 876 #include "watch.h"
54 adx 30
55     dlink_list listing_client_list = { NULL, NULL, 0 };
56     /* Pointer to beginning of Client list */
57     dlink_list global_client_list = {NULL, NULL, 0};
58     /* unknown/client pointer lists */
59     dlink_list unknown_list = {NULL, NULL, 0};
60     dlink_list local_client_list = {NULL, NULL, 0};
61     dlink_list serv_list = {NULL, NULL, 0};
62     dlink_list global_serv_list = {NULL, NULL, 0};
63     dlink_list oper_list = {NULL, NULL, 0};
64    
65     static EVH check_pings;
66    
67     static BlockHeap *client_heap = NULL;
68     static BlockHeap *lclient_heap = NULL;
69    
70     static dlink_list dead_list = { NULL, NULL, 0};
71     static dlink_list abort_list = { NULL, NULL, 0};
72    
73     static dlink_node *eac_next; /* next aborted client to exit */
74    
75     static void check_pings_list(dlink_list *);
76     static void check_unknowns_list(void);
77 michael 1632 static void ban_them(struct Client *, struct MaskItem *);
78 adx 30
79    
80     /* init_client()
81     *
82     * inputs - NONE
83     * output - NONE
84     * side effects - initialize client free memory
85     */
86     void
87     init_client(void)
88     {
89     /* start off the check ping event .. -- adrian
90     * Every 30 seconds is plenty -- db
91     */
92     client_heap = BlockHeapCreate("client", sizeof(struct Client), CLIENT_HEAP_SIZE);
93     lclient_heap = BlockHeapCreate("local client", sizeof(struct LocalUser), LCLIENT_HEAP_SIZE);
94     eventAdd("check_pings", check_pings, NULL, 5);
95     }
96    
97     /*
98     * make_client - create a new Client struct and set it to initial state.
99     *
100     * from == NULL, create local client (a client connected
101     * to a socket).
102     * WARNING: This leaves the client in a dangerous
103     * state where fd == -1, dead flag is not set and
104     * the client is on the unknown_list; therefore,
105     * the first thing to do after calling make_client(NULL)
106     * is setting fd to something reasonable. -adx
107     *
108     * from, create remote client (behind a socket
109     * associated with the client defined by
110     * 'from'). ('from' is a local client!!).
111     */
112     struct Client *
113     make_client(struct Client *from)
114     {
115     struct Client *client_p = BlockHeapAlloc(client_heap);
116    
117     if (from == NULL)
118     {
119 michael 1241 client_p->from = client_p; /* 'from' of local client is self! */
120     client_p->localClient = BlockHeapAlloc(lclient_heap);
121     client_p->localClient->since = CurrentTime;
122     client_p->localClient->lasttime = CurrentTime;
123     client_p->localClient->firsttime = CurrentTime;
124     client_p->localClient->registration = REG_INIT;
125 adx 30
126     /* as good a place as any... */
127 michael 1126 dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list);
128 adx 30 }
129     else
130     client_p->from = from; /* 'from' of local client is self! */
131    
132 michael 1360 client_p->idhnext = client_p;
133 adx 30 client_p->hnext = client_p;
134     client_p->status = STAT_UNKNOWN;
135     strcpy(client_p->username, "unknown");
136 michael 1559 strcpy(client_p->svid, "0");
137 adx 30
138     return client_p;
139     }
140    
141     /*
142     * free_client
143     *
144     * inputs - pointer to client
145     * output - NONE
146     * side effects - client pointed to has its memory freed
147     */
148     static void
149     free_client(struct Client *client_p)
150     {
151     assert(client_p != NULL);
152     assert(client_p != &me);
153     assert(client_p->hnext == client_p);
154 michael 1360 assert(client_p->idhnext == client_p);
155 adx 30 assert(client_p->channel.head == NULL);
156     assert(dlink_list_length(&client_p->channel) == 0);
157 michael 1360 assert(dlink_list_length(&client_p->whowas) == 0);
158     assert(!IsServer(client_p) || IsServer(client_p) && client_p->serv);
159 adx 30
160     MyFree(client_p->serv);
161    
162     if (MyConnect(client_p))
163     {
164 michael 317 assert(client_p->localClient->invited.head == NULL);
165     assert(dlink_list_length(&client_p->localClient->invited) == 0);
166 michael 1360 assert(dlink_list_length(&client_p->localClient->watches) == 0);
167 adx 30 assert(IsClosing(client_p) && IsDead(client_p));
168    
169     MyFree(client_p->localClient->response);
170     MyFree(client_p->localClient->auth_oper);
171    
172     /*
173     * clean up extra sockets from P-lines which have been discarded.
174     */
175     if (client_p->localClient->listener)
176     {
177     assert(0 < client_p->localClient->listener->ref_count);
178     if (0 == --client_p->localClient->listener->ref_count &&
179     !client_p->localClient->listener->active)
180     free_listener(client_p->localClient->listener);
181     }
182    
183     dbuf_clear(&client_p->localClient->buf_recvq);
184     dbuf_clear(&client_p->localClient->buf_sendq);
185    
186     BlockHeapFree(lclient_heap, client_p->localClient);
187     }
188    
189     BlockHeapFree(client_heap, client_p);
190     }
191    
192     /*
193     * check_pings - go through the local client list and check activity
194     * kill off stuff that should die
195     *
196     * inputs - NOT USED (from event)
197     * output - next time_t when check_pings() should be called again
198     * side effects -
199     *
200     *
201     * A PING can be sent to clients as necessary.
202     *
203     * Client/Server ping outs are handled.
204     */
205    
206     /*
207     * Addon from adrian. We used to call this after nextping seconds,
208     * however I've changed it to run once a second. This is only for
209     * PING timeouts, not K/etc-line checks (thanks dianora!). Having it
210     * run once a second makes life a lot easier - when a new client connects
211     * and they need a ping in 4 seconds, if nextping was set to 20 seconds
212     * we end up waiting 20 seconds. This is stupid. :-)
213     * I will optimise (hah!) check_pings() once I've finished working on
214     * tidying up other network IO evilnesses.
215     * -- adrian
216     */
217    
218     static void
219     check_pings(void *notused)
220     {
221     check_pings_list(&local_client_list);
222     check_pings_list(&serv_list);
223     check_unknowns_list();
224     }
225    
226     /* check_pings_list()
227     *
228     * inputs - pointer to list to check
229     * output - NONE
230     * side effects -
231     */
232     static void
233     check_pings_list(dlink_list *list)
234     {
235     char scratch[32]; /* way too generous but... */
236 michael 1644 int ping = 0; /* ping time value from client */
237     dlink_node *ptr = NULL, *next_ptr = NULL;
238 adx 30
239     DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
240     {
241 michael 1644 struct Client *client_p = ptr->data;
242 adx 30
243     /*
244     ** Note: No need to notify opers here. It's
245     ** already done when "FLAGS_DEADSOCKET" is set.
246     */
247     if (IsDead(client_p))
248     {
249     /* Ignore it, its been exited already */
250     continue;
251     }
252    
253     if (!IsRegistered(client_p))
254 michael 1644 ping = CONNECTTIMEOUT;
255 adx 30 else
256 michael 1644 ping = get_client_ping(&client_p->localClient->confs);
257 adx 30
258 michael 1241 if (ping < CurrentTime - client_p->localClient->lasttime)
259 adx 30 {
260     if (!IsPingSent(client_p))
261     {
262     /*
263     * if we havent PINGed the connection and we havent
264     * heard from it in a while, PING it to make sure
265     * it is still alive.
266     */
267     SetPingSent(client_p);
268 michael 1241 client_p->localClient->lasttime = CurrentTime - ping;
269 adx 30 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
270     }
271     else
272     {
273 michael 1241 if (CurrentTime - client_p->localClient->lasttime >= 2 * ping)
274 adx 30 {
275     /*
276     * If the client/server hasn't talked to us in 2*ping seconds
277     * and it has a ping time, then close its connection.
278     */
279     if (IsServer(client_p) || IsHandshake(client_p))
280     {
281 michael 1618 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
282 adx 30 "No response from %s, closing link",
283     get_client_name(client_p, HIDE_IP));
284 michael 1618 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
285 adx 30 "No response from %s, closing link",
286     get_client_name(client_p, MASK_IP));
287 michael 1247 ilog(LOG_TYPE_IRCD, "No response from %s, closing link",
288 adx 30 get_client_name(client_p, HIDE_IP));
289     }
290 michael 650
291 michael 1124 snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds",
292 michael 1241 (int)(CurrentTime - client_p->localClient->lasttime));
293 adx 30 exit_client(client_p, &me, scratch);
294     }
295     }
296     }
297     }
298     }
299    
300     /* check_unknowns_list()
301     *
302     * inputs - pointer to list of unknown clients
303     * output - NONE
304     * side effects - unknown clients get marked for termination after n seconds
305     */
306     static void
307     check_unknowns_list(void)
308     {
309     dlink_node *ptr, *next_ptr;
310    
311     DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
312     {
313     struct Client *client_p = ptr->data;
314    
315 michael 650 /*
316     * Check UNKNOWN connections - if they have been in this state
317 adx 30 * for > 30s, close them.
318     */
319 michael 1241 if (IsAuthFinished(client_p) && (CurrentTime - client_p->localClient->firsttime) > 30)
320 michael 650 exit_client(client_p, &me, "Registration timed out");
321 adx 30 }
322     }
323    
324     /* check_conf_klines()
325     *
326     * inputs - NONE
327     * output - NONE
328     * side effects - Check all connections for a pending kline against the
329     * client, exit the client if a kline matches.
330     */
331     void
332     check_conf_klines(void)
333     {
334     struct Client *client_p = NULL; /* current local client_p being examined */
335 michael 1632 struct MaskItem *conf = NULL;
336 adx 30 dlink_node *ptr, *next_ptr;
337    
338     DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head)
339     {
340     client_p = ptr->data;
341    
342     /* If a client is already being exited
343     */
344     if (IsDead(client_p) || !IsClient(client_p))
345     continue;
346    
347 michael 1632 if ((conf = find_dline_conf(&client_p->localClient->ip,
348 adx 30 client_p->localClient->aftype)) != NULL)
349     {
350 michael 1636 if (conf->type == CONF_EXEMPT)
351 adx 30 continue;
352    
353     ban_them(client_p, conf);
354     continue; /* and go examine next fd/client_p */
355     }
356    
357 michael 1632 if (ConfigFileEntry.glines && (conf = find_gline(client_p)))
358 adx 30 {
359     if (IsExemptKline(client_p) ||
360     IsExemptGline(client_p))
361     {
362 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
363 adx 30 "GLINE over-ruled for %s, client is %sline_exempt",
364     get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g");
365     continue;
366     }
367    
368     ban_them(client_p, conf);
369     /* and go examine next fd/client_p */
370     continue;
371     }
372    
373 michael 1632 if ((conf = find_kill(client_p)) != NULL)
374 adx 30 {
375     if (IsExemptKline(client_p))
376     {
377 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
378 adx 30 "KLINE over-ruled for %s, client is kline_exempt",
379     get_client_name(client_p, HIDE_IP));
380     continue;
381     }
382    
383     ban_them(client_p, conf);
384     continue;
385     }
386    
387 michael 1632 if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info,
388 adx 30 NULL, NULL, 0)) != NULL ||
389 michael 1632 (conf = find_matching_name_conf(CONF_RXLINE, client_p->info,
390 adx 30 NULL, NULL, 0)) != NULL)
391     {
392     ban_them(client_p, conf);
393     continue;
394     }
395     }
396    
397     /* also check the unknowns list for new dlines */
398     DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
399     {
400     client_p = ptr->data;
401    
402 michael 1632 if ((conf = find_dline_conf(&client_p->localClient->ip,
403     client_p->localClient->aftype)))
404 adx 30 {
405 michael 1636 if (conf->type == CONF_EXEMPT)
406 adx 30 continue;
407    
408     exit_client(client_p, &me, "D-lined");
409     }
410     }
411     }
412    
413     /*
414     * ban_them
415     *
416     * inputs - pointer to client to ban
417 michael 1632 * - pointer to MaskItem
418 adx 30 * output - NONE
419     * side effects - given client_p is banned
420     */
421     static void
422 michael 1632 ban_them(struct Client *client_p, struct MaskItem *conf)
423 adx 30 {
424     const char *user_reason = NULL; /* What is sent to user */
425     const char *type_string = NULL;
426     const char dline_string[] = "D-line";
427     const char kline_string[] = "K-line";
428     const char gline_string[] = "G-line";
429     const char xline_string[] = "X-line";
430    
431     switch (conf->type)
432     {
433 michael 1632 case CONF_RKLINE:
434     case CONF_KLINE:
435 adx 30 type_string = kline_string;
436     break;
437 michael 1632 case CONF_DLINE:
438 adx 30 type_string = dline_string;
439     break;
440 michael 1632 case CONF_GLINE:
441 adx 30 type_string = gline_string;
442     break;
443 michael 1632 case CONF_RXLINE:
444     case CONF_XLINE:
445 adx 30 type_string = xline_string;
446 michael 1632 ++conf->count;
447 adx 30 break;
448     default:
449     assert(0);
450     break;
451     }
452    
453 michael 1632 user_reason = conf->reason ? conf->reason : type_string;
454 adx 30
455 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s",
456 adx 30 type_string, get_client_name(client_p, HIDE_IP));
457    
458     if (IsClient(client_p))
459     sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
460     me.name, client_p->name, user_reason);
461    
462 michael 1549 exit_client(client_p, &me, user_reason);
463 adx 30 }
464    
465     /* update_client_exit_stats()
466     *
467     * input - pointer to client
468     * output - NONE
469     * side effects -
470     */
471     static void
472     update_client_exit_stats(struct Client *client_p)
473     {
474 michael 1143 if (IsClient(client_p))
475 adx 30 {
476 michael 1013 assert(Count.total > 0);
477 adx 30 --Count.total;
478 michael 1219 if (HasUMode(client_p, UMODE_OPER))
479 adx 30 --Count.oper;
480 michael 1219 if (HasUMode(client_p, UMODE_INVISIBLE))
481 adx 30 --Count.invisi;
482     }
483 michael 1143 else if (IsServer(client_p))
484 michael 1618 sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE,
485     "Server %s split from %s",
486 michael 1143 client_p->name, client_p->servptr->name);
487 adx 30
488     if (splitchecking && !splitmode)
489     check_splitmode(NULL);
490     }
491    
492     /* find_person()
493     *
494     * inputs - pointer to name
495     * output - return client pointer
496     * side effects - find person by (nick)name
497     */
498     struct Client *
499     find_person(const struct Client *client_p, const char *name)
500     {
501 michael 1564 struct Client *c2ptr = NULL;
502 adx 30
503     if (IsDigit(*name))
504     {
505     if ((c2ptr = hash_find_id(name)) != NULL)
506     {
507     /* invisible users shall not be found by UID guessing */
508 michael 1564 if (HasUMode(c2ptr, UMODE_INVISIBLE))
509     if (!IsServer(client_p) && !HasFlag(client_p, FLAGS_SERVICE))
510     c2ptr = NULL;
511 adx 30 }
512     }
513     else
514 michael 1169 c2ptr = hash_find_client(name);
515 adx 30
516     return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL);
517     }
518    
519     /*
520     * find_chasing - find the client structure for a nick name (user)
521     * using history mechanism if necessary. If the client is not found,
522     * an error message (NO SUCH NICK) is generated. If the client was found
523     * through the history, chasing will be 1 and otherwise 0.
524     */
525     struct Client *
526     find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing)
527     {
528     struct Client *who = find_person(client_p, user);
529    
530     if (chasing)
531     *chasing = 0;
532    
533     if (who)
534 michael 1169 return who;
535 adx 30
536     if (IsDigit(*user))
537 michael 1169 return NULL;
538 adx 30
539     if ((who = get_history(user,
540     (time_t)ConfigFileEntry.kill_chase_time_limit))
541     == NULL)
542     {
543     sendto_one(source_p, form_str(ERR_NOSUCHNICK),
544     me.name, source_p->name, user);
545 michael 1169 return NULL;
546 adx 30 }
547    
548     if (chasing)
549     *chasing = 1;
550    
551 michael 1169 return who;
552 adx 30 }
553    
554     /*
555     * get_client_name - Return the name of the client
556     * for various tracking and
557     * admin purposes. The main purpose of this function is to
558     * return the "socket host" name of the client, if that
559     * differs from the advertised name (other than case).
560     * But, this can be used to any client structure.
561     *
562     * NOTE 1:
563     * Watch out the allocation of "nbuf", if either source_p->name
564     * or source_p->sockhost gets changed into pointers instead of
565     * directly allocated within the structure...
566     *
567     * NOTE 2:
568     * Function return either a pointer to the structure (source_p) or
569     * to internal buffer (nbuf). *NEVER* use the returned pointer
570     * to modify what it points!!!
571     */
572     const char *
573 michael 1328 get_client_name(const struct Client *client, enum addr_mask_type type)
574 adx 30 {
575     static char nbuf[HOSTLEN * 2 + USERLEN + 5];
576    
577     assert(client != NULL);
578    
579 michael 1340 if (!MyConnect(client))
580 michael 1124 return client->name;
581 adx 30
582 michael 1340 if (IsServer(client) || IsConnecting(client) || IsHandshake(client))
583     {
584     if (!irccmp(client->name, client->host))
585     return client->name;
586     else if (ConfigServerHide.hide_server_ips)
587 michael 1328 type = MASK_IP;
588 michael 1340 }
589 adx 30
590     if (ConfigFileEntry.hide_spoof_ips)
591 michael 1328 if (type == SHOW_IP && IsIPSpoof(client))
592     type = MASK_IP;
593 adx 30
594     /* And finally, let's get the host information, ip or name */
595 michael 1328 switch (type)
596 adx 30 {
597     case SHOW_IP:
598 michael 1339 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
599     client->name,
600     client->username, client->sockhost);
601     break;
602 adx 30 case MASK_IP:
603 michael 1339 if (client->localClient->aftype == AF_INET)
604     snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
605     client->name, client->username);
606     else
607     snprintf(nbuf, sizeof(nbuf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]",
608     client->name, client->username);
609 adx 30 break;
610     default:
611 michael 1124 snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
612     client->name,
613     client->username, client->host);
614 adx 30 }
615    
616 michael 1124 return nbuf;
617 adx 30 }
618    
619     void
620     free_exited_clients(void)
621     {
622 michael 887 dlink_node *ptr = NULL, *next = NULL;
623 adx 30
624     DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
625     {
626 michael 887 free_client(ptr->data);
627 adx 30 dlinkDelete(ptr, &dead_list);
628     free_dlink_node(ptr);
629     }
630     }
631    
632     /*
633     * Exit one client, local or remote. Assuming all dependents have
634     * been already removed, and socket closed for local client.
635     *
636     * The only messages generated are QUITs on channels.
637     */
638     static void
639     exit_one_client(struct Client *source_p, const char *quitmsg)
640     {
641     dlink_node *lp = NULL, *next_lp = NULL;
642    
643     assert(!IsMe(source_p));
644    
645 michael 1118 if (IsClient(source_p))
646 adx 30 {
647     if (source_p->servptr->serv != NULL)
648 michael 889 dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list);
649 adx 30
650 michael 1118 /*
651     * If a person is on a channel, send a QUIT notice
652     * to every client (person) on the same channel (so
653     * that the client can show the "**signoff" message).
654     * (Note: The notice is to the local clients *only*)
655     */
656 adx 30 sendto_common_channels_local(source_p, 0, ":%s!%s@%s QUIT :%s",
657     source_p->name, source_p->username,
658     source_p->host, quitmsg);
659     DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head)
660     remove_user_from_channel(lp->data);
661    
662     add_history(source_p, 0);
663     off_history(source_p);
664    
665 michael 876 watch_check_hash(source_p, RPL_LOGOFF);
666    
667 michael 889 if (MyConnect(source_p))
668 adx 30 {
669 michael 317 /* Clean up invitefield */
670     DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head)
671     del_invite(lp->data, source_p);
672 michael 887
673     del_all_accepts(source_p);
674 michael 317 }
675 adx 30 }
676 michael 1118 else if (IsServer(source_p))
677     {
678     dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list);
679 adx 30
680 michael 1118 if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL)
681     free_dlink_node(lp);
682     }
683    
684 adx 30 /* Remove source_p from the client lists */
685     if (HasID(source_p))
686     hash_del_id(source_p);
687     if (source_p->name[0])
688     hash_del_client(source_p);
689    
690     if (IsUserHostIp(source_p))
691     delete_user_host(source_p->username, source_p->host, !MyConnect(source_p));
692    
693     /* remove from global client list
694     * NOTE: source_p->node.next cannot be NULL if the client is added
695     * to global_client_list (there is always &me at its end)
696     */
697     if (source_p != NULL && source_p->node.next != NULL)
698     dlinkDelete(&source_p->node, &global_client_list);
699    
700     update_client_exit_stats(source_p);
701    
702     /* Check to see if the client isn't already on the dead list */
703     assert(dlinkFind(&dead_list, source_p) == NULL);
704    
705     /* add to dead client dlist */
706     SetDead(source_p);
707     dlinkAdd(source_p, make_dlink_node(), &dead_list);
708     }
709    
710     /* Recursively send QUITs and SQUITs for source_p and all its dependent clients
711     * and servers to those servers that need them. A server needs the client
712     * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it
713     * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once
714     * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending
715     * on that one -orabidoo
716     *
717     * This is now called on each local server -adx
718     */
719     static void
720     recurse_send_quits(struct Client *original_source_p, struct Client *source_p,
721     struct Client *from, struct Client *to, const char *comment,
722 michael 1118 const char *splitstr)
723 adx 30 {
724     dlink_node *ptr, *next;
725     struct Client *target_p;
726    
727     assert(to != source_p); /* should be already removed from serv_list */
728    
729     /* If this server can handle quit storm (QS) removal
730     * of dependents, just send the SQUIT
731     */
732 michael 1529 if (!IsCapable(to, CAP_QS))
733 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
734 adx 30 {
735     target_p = ptr->data;
736     sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr);
737     }
738    
739 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
740 adx 30 recurse_send_quits(original_source_p, ptr->data, from, to,
741 michael 1118 comment, splitstr);
742 adx 30
743 michael 1529 if ((source_p == original_source_p && to != from) ||
744     !IsCapable(to, CAP_QS))
745 adx 30 {
746     /* don't use a prefix here - we have to be 100% sure the message
747     * will be accepted without Unknown prefix etc.. */
748     sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment);
749     }
750     }
751    
752     /*
753     * Remove all clients that depend on source_p; assumes all (S)QUITs have
754     * already been sent. we make sure to exit a server's dependent clients
755     * and servers before the server itself; exit_one_client takes care of
756     * actually removing things off llists. tweaked from +CSr31 -orabidoo
757     */
758     static void
759     recurse_remove_clients(struct Client *source_p, const char *quitmsg)
760     {
761     dlink_node *ptr, *next;
762    
763 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head)
764 adx 30 exit_one_client(ptr->data, quitmsg);
765    
766 michael 889 DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head)
767 adx 30 {
768     recurse_remove_clients(ptr->data, quitmsg);
769     exit_one_client(ptr->data, quitmsg);
770     }
771     }
772    
773     /*
774     ** Remove *everything* that depends on source_p, from all lists, and sending
775     ** all necessary QUITs and SQUITs. source_p itself is still on the lists,
776     ** and its SQUITs have been sent except for the upstream one -orabidoo
777     */
778     static void
779     remove_dependents(struct Client *source_p, struct Client *from,
780     const char *comment, const char *splitstr)
781     {
782 michael 1118 dlink_node *ptr = NULL;
783 adx 30
784     DLINK_FOREACH(ptr, serv_list.head)
785 michael 1118 recurse_send_quits(source_p, source_p, from, ptr->data,
786     comment, splitstr);
787 adx 30
788     recurse_remove_clients(source_p, splitstr);
789     }
790    
791     /*
792     * exit_client - exit a client of any type. Generally, you can use
793     * this on any struct Client, regardless of its state.
794     *
795     * Note, you shouldn't exit remote _users_ without first doing
796 michael 1219 * AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message.
797     * However, it is perfectly correct to call exit_client to force a _server_
798 adx 30 * quit (either local or remote one).
799     *
800     * inputs: - a client pointer that is going to be exited
801     * - for servers, the second argument is a pointer to who
802     * is firing the server. This side won't get any generated
803     * messages. NEVER NULL!
804     * output: none
805     * side effects: the client is delinked from all lists, disconnected,
806     * and the rest of IRC network is notified of the exit.
807     * Client memory is scheduled to be freed
808     */
809     void
810     exit_client(struct Client *source_p, struct Client *from, const char *comment)
811     {
812 michael 1118 dlink_node *m = NULL;
813 adx 30
814     if (MyConnect(source_p))
815     {
816     /* DO NOT REMOVE. exit_client can be called twice after a failed
817     * read/write.
818     */
819     if (IsClosing(source_p))
820     return;
821    
822     SetClosing(source_p);
823    
824     if (IsIpHash(source_p))
825     remove_one_ip(&source_p->localClient->ip);
826    
827 michael 992 if (source_p->localClient->auth)
828     {
829     delete_auth(source_p->localClient->auth);
830     source_p->localClient->auth = NULL;
831     }
832 adx 30
833 michael 1571 /*
834     * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING
835 adx 30 * STAT_HANDSHAKE or STAT_UNKNOWN
836     * all of which are lumped together into unknown_list
837     *
838     * In all above cases IsRegistered() will not be true.
839     */
840     if (!IsRegistered(source_p))
841     {
842 michael 1126 assert(dlinkFind(&unknown_list, source_p));
843    
844     dlinkDelete(&source_p->localClient->lclient_node, &unknown_list);
845 adx 30 }
846     else if (IsClient(source_p))
847     {
848 michael 1247 time_t on_for = CurrentTime - source_p->localClient->firsttime;
849 michael 1013 assert(Count.local > 0);
850 adx 30 Count.local--;
851    
852 michael 1219 if (HasUMode(source_p, UMODE_OPER))
853 adx 30 if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL)
854     free_dlink_node(m);
855    
856 michael 1126 assert(dlinkFind(&local_client_list, source_p));
857 adx 30 dlinkDelete(&source_p->localClient->lclient_node, &local_client_list);
858 michael 1126
859 adx 30 if (source_p->localClient->list_task != NULL)
860     free_list_task(source_p->localClient->list_task, source_p);
861    
862 michael 876 watch_del_watch_list(source_p);
863 michael 1618 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
864     "Client exiting: %s (%s@%s) [%s] [%s]",
865 adx 30 source_p->name, source_p->username, source_p->host, comment,
866     ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
867     "255.255.255.255" : source_p->sockhost);
868 michael 1618 sendto_realops_flags(UMODE_CCONN_FULL, L_ALL, SEND_NOTICE,
869     "CLIEXIT: %s %s %s %s 0 %s",
870 db 853 source_p->name,
871     source_p->username,
872     source_p->host,
873 db 849 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
874 db 853 "255.255.255.255" : source_p->sockhost,
875     comment);
876 michael 1247 ilog(LOG_TYPE_USER, "%s (%3u:%02u:%02u): %s!%s@%s %llu/%llu",
877     myctime(source_p->localClient->firsttime), (unsigned int)(on_for / 3600),
878     (unsigned int)((on_for % 3600)/60), (unsigned int)(on_for % 60),
879     source_p->name, source_p->username, source_p->host,
880     source_p->localClient->send.bytes>>10,
881     source_p->localClient->recv.bytes>>10);
882 adx 30 }
883 michael 1571 else if (IsServer(source_p))
884 adx 30 {
885 michael 1571 assert(Count.myserver > 0);
886     --Count.myserver;
887 adx 30
888 michael 1571 assert(dlinkFind(&serv_list, source_p));
889     dlinkDelete(&source_p->localClient->lclient_node, &serv_list);
890     unset_chcap_usage_counts(source_p);
891 adx 30 }
892    
893     if (!IsDead(source_p))
894     {
895     if (IsServer(source_p))
896     {
897     /* for them, we are exiting the network */
898     sendto_one(source_p, ":%s SQUIT %s :%s",
899     ID_or_name(from, source_p), me.name, comment);
900     }
901    
902     sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
903     source_p->host, comment);
904     }
905    
906     /*
907     ** Currently only server connections can have
908     ** depending remote clients here, but it does no
909     ** harm to check for all local clients. In
910     ** future some other clients than servers might
911     ** have remotes too...
912     **
913     ** Close the Client connection first and mark it
914     ** so that no messages are attempted to send to it.
915     ** Remember it makes source_p->from == NULL.
916     */
917     close_connection(source_p);
918     }
919    
920     if (IsServer(source_p))
921     {
922     char splitstr[HOSTLEN + HOSTLEN + 2];
923    
924     /* This shouldn't ever happen */
925     assert(source_p->serv != NULL && source_p->servptr != NULL);
926    
927     if (ConfigServerHide.hide_servers)
928 michael 887 /*
929     * Set netsplit message to "*.net *.split" to still show
930 adx 30 * that its a split, but hide the servers splitting
931     */
932     strcpy(splitstr, "*.net *.split");
933     else
934     snprintf(splitstr, sizeof(splitstr), "%s %s",
935     source_p->servptr->name, source_p->name);
936    
937     remove_dependents(source_p, from->from, comment, splitstr);
938    
939     if (source_p->servptr == &me)
940     {
941 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
942 adx 30 "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
943 michael 1241 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
944 adx 30 source_p->localClient->send.bytes >> 10,
945     source_p->localClient->recv.bytes >> 10);
946 michael 1247 ilog(LOG_TYPE_IRCD, "%s was connected for %d seconds. %llu/%llu sendK/recvK.",
947 michael 1241 source_p->name, (int)(CurrentTime - source_p->localClient->firsttime),
948 adx 30 source_p->localClient->send.bytes >> 10,
949     source_p->localClient->recv.bytes >> 10);
950     }
951     }
952 michael 1219 else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED))
953 adx 30 {
954 michael 1474 sendto_server(from->from, CAP_TS6, NOCAPS,
955 adx 30 ":%s QUIT :%s", ID(source_p), comment);
956 michael 1474 sendto_server(from->from, NOCAPS, CAP_TS6,
957 adx 30 ":%s QUIT :%s", source_p->name, comment);
958     }
959    
960     /* The client *better* be off all of the lists */
961     assert(dlinkFind(&unknown_list, source_p) == NULL);
962     assert(dlinkFind(&local_client_list, source_p) == NULL);
963     assert(dlinkFind(&serv_list, source_p) == NULL);
964     assert(dlinkFind(&oper_list, source_p) == NULL);
965    
966     exit_one_client(source_p, comment);
967     }
968    
969     /*
970     * dead_link_on_write - report a write error if not already dead,
971     * mark it as dead then exit it
972     */
973     void
974     dead_link_on_write(struct Client *client_p, int ierrno)
975     {
976     dlink_node *ptr;
977    
978     if (IsDefunct(client_p))
979     return;
980    
981     dbuf_clear(&client_p->localClient->buf_recvq);
982     dbuf_clear(&client_p->localClient->buf_sendq);
983    
984     assert(dlinkFind(&abort_list, client_p) == NULL);
985     ptr = make_dlink_node();
986     /* don't let exit_aborted_clients() finish yet */
987     dlinkAddTail(client_p, ptr, &abort_list);
988    
989     if (eac_next == NULL)
990     eac_next = ptr;
991    
992     SetDead(client_p); /* You are dead my friend */
993     }
994    
995     /*
996     * dead_link_on_read - report a read error if not already dead,
997     * mark it as dead then exit it
998     */
999     void
1000     dead_link_on_read(struct Client *client_p, int error)
1001     {
1002     char errmsg[255];
1003     int current_error;
1004    
1005     if (IsDefunct(client_p))
1006     return;
1007    
1008     dbuf_clear(&client_p->localClient->buf_recvq);
1009     dbuf_clear(&client_p->localClient->buf_sendq);
1010    
1011     current_error = get_sockerr(client_p->localClient->fd.fd);
1012    
1013     if (IsServer(client_p) || IsHandshake(client_p))
1014     {
1015 michael 1241 int connected = CurrentTime - client_p->localClient->firsttime;
1016 adx 30
1017     if (error == 0)
1018     {
1019     /* Admins get the real IP */
1020 michael 1618 sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE,
1021 adx 30 "Server %s closed the connection",
1022     get_client_name(client_p, SHOW_IP));
1023    
1024     /* Opers get a masked IP */
1025 michael 1618 sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE,
1026 adx 30 "Server %s closed the connection",
1027     get_client_name(client_p, MASK_IP));
1028    
1029 michael 1247 ilog(LOG_TYPE_IRCD, "Server %s closed the connection",
1030 adx 30 get_client_name(client_p, SHOW_IP));
1031     }
1032     else
1033     {
1034 michael 617 report_error(L_ADMIN, "Lost connection to %s: %s",
1035 adx 30 get_client_name(client_p, SHOW_IP), current_error);
1036 michael 617 report_error(L_OPER, "Lost connection to %s: %s",
1037 adx 30 get_client_name(client_p, MASK_IP), current_error);
1038     }
1039    
1040 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1041 adx 30 "%s had been connected for %d day%s, %2d:%02d:%02d",
1042     client_p->name, connected/86400,
1043     (connected/86400 == 1) ? "" : "s",
1044     (connected % 86400) / 3600, (connected % 3600) / 60,
1045     connected % 60);
1046     }
1047    
1048     if (error == 0)
1049     strlcpy(errmsg, "Remote host closed the connection",
1050     sizeof(errmsg));
1051     else
1052 michael 1124 snprintf(errmsg, sizeof(errmsg), "Read error: %s",
1053     strerror(current_error));
1054 adx 30
1055     exit_client(client_p, &me, errmsg);
1056     }
1057    
1058     void
1059     exit_aborted_clients(void)
1060     {
1061     dlink_node *ptr;
1062     struct Client *target_p;
1063     const char *notice;
1064    
1065     DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head)
1066     {
1067     target_p = ptr->data;
1068     eac_next = ptr->next;
1069    
1070     if (target_p == NULL)
1071     {
1072 michael 1618 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
1073 adx 30 "Warning: null client on abort_list!");
1074     dlinkDelete(ptr, &abort_list);
1075     free_dlink_node(ptr);
1076     continue;
1077     }
1078    
1079     dlinkDelete(ptr, &abort_list);
1080    
1081     if (IsSendQExceeded(target_p))
1082     notice = "Max SendQ exceeded";
1083     else
1084     notice = "Write error: connection closed";
1085    
1086     exit_client(target_p, &me, notice);
1087     free_dlink_node(ptr);
1088     }
1089     }
1090    
1091     /*
1092     * accept processing, this adds a form of "caller ID" to ircd
1093 michael 887 *
1094 adx 30 * If a client puts themselves into "caller ID only" mode,
1095 michael 887 * only clients that match a client pointer they have put on
1096 adx 30 * the accept list will be allowed to message them.
1097     *
1098 michael 887 * Diane Bruce, "Dianora" db@db.net
1099 adx 30 */
1100    
1101 michael 887 void
1102     del_accept(struct split_nuh_item *accept_p, struct Client *client_p)
1103 adx 30 {
1104 michael 887 dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist);
1105 adx 30
1106 michael 887 MyFree(accept_p->nickptr);
1107     MyFree(accept_p->userptr);
1108     MyFree(accept_p->hostptr);
1109     MyFree(accept_p);
1110     }
1111 adx 30
1112 michael 887 struct split_nuh_item *
1113     find_accept(const char *nick, const char *user,
1114     const char *host, struct Client *client_p, int do_match)
1115     {
1116     dlink_node *ptr = NULL;
1117     /* XXX We wouldn't need that if match() would return 0 on match */
1118     int (*cmpfunc)(const char *, const char *) = do_match ? match : irccmp;
1119 adx 30
1120 michael 887 DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head)
1121 adx 30 {
1122 michael 887 struct split_nuh_item *accept_p = ptr->data;
1123    
1124     if (cmpfunc(accept_p->nickptr, nick) == do_match &&
1125     cmpfunc(accept_p->userptr, user) == do_match &&
1126     cmpfunc(accept_p->hostptr, host) == do_match)
1127     return accept_p;
1128 adx 30 }
1129    
1130 michael 887 return NULL;
1131 adx 30 }
1132    
1133 michael 887 /* accept_message()
1134 adx 30 *
1135 michael 887 * inputs - pointer to source client
1136     * - pointer to target client
1137     * output - 1 if accept this message 0 if not
1138     * side effects - See if source is on target's allow list
1139 adx 30 */
1140 michael 887 int
1141     accept_message(struct Client *source,
1142     struct Client *target)
1143 adx 30 {
1144 michael 887 dlink_node *ptr = NULL;
1145 adx 30
1146 michael 887 if (source == target || find_accept(source->name, source->username,
1147     source->host, target, 1))
1148     return 1;
1149 adx 30
1150 michael 1219 if (HasUMode(target, UMODE_SOFTCALLERID))
1151 michael 887 DLINK_FOREACH(ptr, target->channel.head)
1152     if (IsMember(source, ((struct Membership *)ptr->data)->chptr))
1153     return 1;
1154 adx 30
1155 michael 887 return 0;
1156 adx 30 }
1157    
1158     /* del_all_accepts()
1159     *
1160 michael 887 * inputs - pointer to exiting client
1161     * output - NONE
1162     * side effects - Walk through given clients acceptlist and remove all entries
1163 adx 30 */
1164     void
1165     del_all_accepts(struct Client *client_p)
1166     {
1167 michael 887 dlink_node *ptr = NULL, *next_ptr = NULL;
1168 adx 30
1169 michael 887 DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head)
1170     del_accept(ptr->data, client_p);
1171 adx 30 }

Properties

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svn:keywords Id Revision