1 |
/* |
2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
3 |
* client.c: Controls clients. |
4 |
* |
5 |
* Copyright (C) 2002 by the past and present ircd coders, and others. |
6 |
* |
7 |
* This program is free software; you can redistribute it and/or modify |
8 |
* it under the terms of the GNU General Public License as published by |
9 |
* the Free Software Foundation; either version 2 of the License, or |
10 |
* (at your option) any later version. |
11 |
* |
12 |
* This program is distributed in the hope that it will be useful, |
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* 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 |
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* |
22 |
* $Id$ |
23 |
*/ |
24 |
|
25 |
#include "stdinc.h" |
26 |
#include "list.h" |
27 |
#include "client.h" |
28 |
#include "channel_mode.h" |
29 |
#include "event.h" |
30 |
#include "fdlist.h" |
31 |
#include "hash.h" |
32 |
#include "irc_string.h" |
33 |
#include "ircd.h" |
34 |
#include "s_gline.h" |
35 |
#include "numeric.h" |
36 |
#include "packet.h" |
37 |
#include "s_auth.h" |
38 |
#include "s_bsd.h" |
39 |
#include "conf.h" |
40 |
#include "log.h" |
41 |
#include "s_misc.h" |
42 |
#include "s_serv.h" |
43 |
#include "send.h" |
44 |
#include "whowas.h" |
45 |
#include "s_user.h" |
46 |
#include "dbuf.h" |
47 |
#include "memory.h" |
48 |
#include "hostmask.h" |
49 |
#include "balloc.h" |
50 |
#include "listener.h" |
51 |
#include "irc_res.h" |
52 |
#include "userhost.h" |
53 |
#include "watch.h" |
54 |
|
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}; |
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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 |
static void ban_them(struct Client *, struct MaskItem *); |
78 |
|
79 |
|
80 |
/* init_client() |
81 |
* |
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* 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 |
*/ |
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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 |
* |
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* from == NULL, create local client (a client connected |
101 |
* to a socket). |
102 |
* WARNING: This leaves the client in a dangerous |
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* 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) |
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* is setting fd to something reasonable. -adx |
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* |
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* from, create remote client (behind a socket |
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* associated with the client defined by |
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* 'from'). ('from' is a local client!!). |
111 |
*/ |
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struct Client * |
113 |
make_client(struct Client *from) |
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{ |
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struct Client *client_p = BlockHeapAlloc(client_heap); |
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|
117 |
if (from == NULL) |
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{ |
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client_p->from = client_p; /* 'from' of local client is self! */ |
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client_p->localClient = BlockHeapAlloc(lclient_heap); |
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client_p->localClient->since = CurrentTime; |
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client_p->localClient->lasttime = CurrentTime; |
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client_p->localClient->firsttime = CurrentTime; |
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client_p->localClient->registration = REG_INIT; |
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|
126 |
/* as good a place as any... */ |
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dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list); |
128 |
} |
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else |
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client_p->from = from; /* 'from' of local client is self! */ |
131 |
|
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client_p->idhnext = client_p; |
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client_p->hnext = client_p; |
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client_p->status = STAT_UNKNOWN; |
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strcpy(client_p->username, "unknown"); |
136 |
strcpy(client_p->svid, "0"); |
137 |
|
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return client_p; |
139 |
} |
140 |
|
141 |
/* |
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* free_client |
143 |
* |
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* inputs - pointer to client |
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* output - NONE |
146 |
* side effects - client pointed to has its memory freed |
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*/ |
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 |
assert(client_p->idhnext == client_p); |
155 |
assert(client_p->channel.head == NULL); |
156 |
assert(dlink_list_length(&client_p->channel) == 0); |
157 |
assert(dlink_list_length(&client_p->whowas) == 0); |
158 |
assert(!IsServer(client_p) || IsServer(client_p) && client_p->serv); |
159 |
|
160 |
MyFree(client_p->serv); |
161 |
|
162 |
if (MyConnect(client_p)) |
163 |
{ |
164 |
assert(client_p->localClient->invited.head == NULL); |
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assert(dlink_list_length(&client_p->localClient->invited) == 0); |
166 |
assert(dlink_list_length(&client_p->localClient->watches) == 0); |
167 |
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 |
int ping = 0; /* ping time value from client */ |
237 |
dlink_node *ptr = NULL, *next_ptr = NULL; |
238 |
|
239 |
DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) |
240 |
{ |
241 |
struct Client *client_p = ptr->data; |
242 |
|
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 |
ping = CONNECTTIMEOUT; |
255 |
else |
256 |
ping = get_client_ping(&client_p->localClient->confs); |
257 |
|
258 |
if (ping < CurrentTime - client_p->localClient->lasttime) |
259 |
{ |
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 |
client_p->localClient->lasttime = CurrentTime - ping; |
269 |
sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p)); |
270 |
} |
271 |
else |
272 |
{ |
273 |
if (CurrentTime - client_p->localClient->lasttime >= 2 * ping) |
274 |
{ |
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 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, |
282 |
"No response from %s, closing link", |
283 |
get_client_name(client_p, HIDE_IP)); |
284 |
sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, |
285 |
"No response from %s, closing link", |
286 |
get_client_name(client_p, MASK_IP)); |
287 |
ilog(LOG_TYPE_IRCD, "No response from %s, closing link", |
288 |
get_client_name(client_p, HIDE_IP)); |
289 |
} |
290 |
|
291 |
snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds", |
292 |
(int)(CurrentTime - client_p->localClient->lasttime)); |
293 |
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 |
/* |
316 |
* Check UNKNOWN connections - if they have been in this state |
317 |
* for > 30s, close them. |
318 |
*/ |
319 |
if (IsAuthFinished(client_p) && (CurrentTime - client_p->localClient->firsttime) > 30) |
320 |
exit_client(client_p, &me, "Registration timed out"); |
321 |
} |
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 |
struct MaskItem *conf = NULL; |
336 |
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 |
if ((conf = find_dline_conf(&client_p->localClient->ip, |
348 |
client_p->localClient->aftype)) != NULL) |
349 |
{ |
350 |
if (conf->type == CONF_EXEMPT) |
351 |
continue; |
352 |
|
353 |
ban_them(client_p, conf); |
354 |
continue; /* and go examine next fd/client_p */ |
355 |
} |
356 |
|
357 |
if (ConfigFileEntry.glines && (conf = find_gline(client_p))) |
358 |
{ |
359 |
if (IsExemptKline(client_p) || |
360 |
IsExemptGline(client_p)) |
361 |
{ |
362 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
363 |
"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 |
if ((conf = find_kill(client_p)) != NULL) |
374 |
{ |
375 |
if (IsExemptKline(client_p)) |
376 |
{ |
377 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
378 |
"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 |
if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info, |
388 |
NULL, NULL, 0)) != NULL || |
389 |
(conf = find_matching_name_conf(CONF_RXLINE, client_p->info, |
390 |
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 |
if ((conf = find_dline_conf(&client_p->localClient->ip, |
403 |
client_p->localClient->aftype))) |
404 |
{ |
405 |
if (conf->type == CONF_EXEMPT) |
406 |
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 |
* - pointer to MaskItem |
418 |
* output - NONE |
419 |
* side effects - given client_p is banned |
420 |
*/ |
421 |
static void |
422 |
ban_them(struct Client *client_p, struct MaskItem *conf) |
423 |
{ |
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 |
case CONF_RKLINE: |
434 |
case CONF_KLINE: |
435 |
type_string = kline_string; |
436 |
break; |
437 |
case CONF_DLINE: |
438 |
type_string = dline_string; |
439 |
break; |
440 |
case CONF_GLINE: |
441 |
type_string = gline_string; |
442 |
break; |
443 |
case CONF_RXLINE: |
444 |
case CONF_XLINE: |
445 |
type_string = xline_string; |
446 |
++conf->count; |
447 |
break; |
448 |
default: |
449 |
assert(0); |
450 |
break; |
451 |
} |
452 |
|
453 |
user_reason = conf->reason ? conf->reason : type_string; |
454 |
|
455 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s", |
456 |
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 |
exit_client(client_p, &me, user_reason); |
463 |
} |
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 |
if (IsClient(client_p)) |
475 |
{ |
476 |
assert(Count.total > 0); |
477 |
--Count.total; |
478 |
if (HasUMode(client_p, UMODE_OPER)) |
479 |
--Count.oper; |
480 |
if (HasUMode(client_p, UMODE_INVISIBLE)) |
481 |
--Count.invisi; |
482 |
} |
483 |
else if (IsServer(client_p)) |
484 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE, |
485 |
"Server %s split from %s", |
486 |
client_p->name, client_p->servptr->name); |
487 |
|
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 |
struct Client *c2ptr = NULL; |
502 |
|
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 |
if (HasUMode(c2ptr, UMODE_INVISIBLE)) |
509 |
if (!IsServer(client_p) && !HasFlag(client_p, FLAGS_SERVICE)) |
510 |
c2ptr = NULL; |
511 |
} |
512 |
} |
513 |
else |
514 |
c2ptr = hash_find_client(name); |
515 |
|
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 |
return who; |
535 |
|
536 |
if (IsDigit(*user)) |
537 |
return NULL; |
538 |
|
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 |
return NULL; |
546 |
} |
547 |
|
548 |
if (chasing) |
549 |
*chasing = 1; |
550 |
|
551 |
return who; |
552 |
} |
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 |
get_client_name(const struct Client *client, enum addr_mask_type type) |
574 |
{ |
575 |
static char nbuf[HOSTLEN * 2 + USERLEN + 5]; |
576 |
|
577 |
assert(client != NULL); |
578 |
|
579 |
if (!MyConnect(client)) |
580 |
return client->name; |
581 |
|
582 |
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 |
type = MASK_IP; |
588 |
} |
589 |
|
590 |
if (ConfigFileEntry.hide_spoof_ips) |
591 |
if (type == SHOW_IP && IsIPSpoof(client)) |
592 |
type = MASK_IP; |
593 |
|
594 |
/* And finally, let's get the host information, ip or name */ |
595 |
switch (type) |
596 |
{ |
597 |
case SHOW_IP: |
598 |
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", |
599 |
client->name, |
600 |
client->username, client->sockhost); |
601 |
break; |
602 |
case MASK_IP: |
603 |
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 |
break; |
610 |
default: |
611 |
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", |
612 |
client->name, |
613 |
client->username, client->host); |
614 |
} |
615 |
|
616 |
return nbuf; |
617 |
} |
618 |
|
619 |
void |
620 |
free_exited_clients(void) |
621 |
{ |
622 |
dlink_node *ptr = NULL, *next = NULL; |
623 |
|
624 |
DLINK_FOREACH_SAFE(ptr, next, dead_list.head) |
625 |
{ |
626 |
free_client(ptr->data); |
627 |
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 |
if (IsClient(source_p)) |
646 |
{ |
647 |
if (source_p->servptr->serv != NULL) |
648 |
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list); |
649 |
|
650 |
/* |
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 |
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 |
watch_check_hash(source_p, RPL_LOGOFF); |
666 |
|
667 |
if (MyConnect(source_p)) |
668 |
{ |
669 |
/* Clean up invitefield */ |
670 |
DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head) |
671 |
del_invite(lp->data, source_p); |
672 |
|
673 |
del_all_accepts(source_p); |
674 |
} |
675 |
} |
676 |
else if (IsServer(source_p)) |
677 |
{ |
678 |
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list); |
679 |
|
680 |
if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL) |
681 |
free_dlink_node(lp); |
682 |
} |
683 |
|
684 |
/* 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 |
const char *splitstr) |
723 |
{ |
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 |
if (!IsCapable(to, CAP_QS)) |
733 |
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head) |
734 |
{ |
735 |
target_p = ptr->data; |
736 |
sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr); |
737 |
} |
738 |
|
739 |
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head) |
740 |
recurse_send_quits(original_source_p, ptr->data, from, to, |
741 |
comment, splitstr); |
742 |
|
743 |
if ((source_p == original_source_p && to != from) || |
744 |
!IsCapable(to, CAP_QS)) |
745 |
{ |
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 |
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head) |
764 |
exit_one_client(ptr->data, quitmsg); |
765 |
|
766 |
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head) |
767 |
{ |
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 |
dlink_node *ptr = NULL; |
783 |
|
784 |
DLINK_FOREACH(ptr, serv_list.head) |
785 |
recurse_send_quits(source_p, source_p, from, ptr->data, |
786 |
comment, splitstr); |
787 |
|
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 |
* 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 |
* 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 |
dlink_node *m = NULL; |
813 |
|
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 |
if (source_p->localClient->auth) |
828 |
{ |
829 |
delete_auth(source_p->localClient->auth); |
830 |
source_p->localClient->auth = NULL; |
831 |
} |
832 |
|
833 |
/* |
834 |
* This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING |
835 |
* 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 |
assert(dlinkFind(&unknown_list, source_p)); |
843 |
|
844 |
dlinkDelete(&source_p->localClient->lclient_node, &unknown_list); |
845 |
} |
846 |
else if (IsClient(source_p)) |
847 |
{ |
848 |
time_t on_for = CurrentTime - source_p->localClient->firsttime; |
849 |
assert(Count.local > 0); |
850 |
Count.local--; |
851 |
|
852 |
if (HasUMode(source_p, UMODE_OPER)) |
853 |
if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL) |
854 |
free_dlink_node(m); |
855 |
|
856 |
assert(dlinkFind(&local_client_list, source_p)); |
857 |
dlinkDelete(&source_p->localClient->lclient_node, &local_client_list); |
858 |
|
859 |
if (source_p->localClient->list_task != NULL) |
860 |
free_list_task(source_p->localClient->list_task, source_p); |
861 |
|
862 |
watch_del_watch_list(source_p); |
863 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
864 |
"Client exiting: %s (%s@%s) [%s] [%s]", |
865 |
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 |
sendto_realops_flags(UMODE_CCONN_FULL, L_ALL, SEND_NOTICE, |
869 |
"CLIEXIT: %s %s %s %s 0 %s", |
870 |
source_p->name, |
871 |
source_p->username, |
872 |
source_p->host, |
873 |
ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ? |
874 |
"255.255.255.255" : source_p->sockhost, |
875 |
comment); |
876 |
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 |
} |
883 |
else if (IsServer(source_p)) |
884 |
{ |
885 |
assert(Count.myserver > 0); |
886 |
--Count.myserver; |
887 |
|
888 |
assert(dlinkFind(&serv_list, source_p)); |
889 |
dlinkDelete(&source_p->localClient->lclient_node, &serv_list); |
890 |
unset_chcap_usage_counts(source_p); |
891 |
} |
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 |
/* |
929 |
* Set netsplit message to "*.net *.split" to still show |
930 |
* 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 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
942 |
"%s was connected for %d seconds. %llu/%llu sendK/recvK.", |
943 |
source_p->name, (int)(CurrentTime - source_p->localClient->firsttime), |
944 |
source_p->localClient->send.bytes >> 10, |
945 |
source_p->localClient->recv.bytes >> 10); |
946 |
ilog(LOG_TYPE_IRCD, "%s was connected for %d seconds. %llu/%llu sendK/recvK.", |
947 |
source_p->name, (int)(CurrentTime - source_p->localClient->firsttime), |
948 |
source_p->localClient->send.bytes >> 10, |
949 |
source_p->localClient->recv.bytes >> 10); |
950 |
} |
951 |
} |
952 |
else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED)) |
953 |
{ |
954 |
sendto_server(from->from, CAP_TS6, NOCAPS, |
955 |
":%s QUIT :%s", ID(source_p), comment); |
956 |
sendto_server(from->from, NOCAPS, CAP_TS6, |
957 |
":%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 |
int connected = CurrentTime - client_p->localClient->firsttime; |
1016 |
|
1017 |
if (error == 0) |
1018 |
{ |
1019 |
/* Admins get the real IP */ |
1020 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, |
1021 |
"Server %s closed the connection", |
1022 |
get_client_name(client_p, SHOW_IP)); |
1023 |
|
1024 |
/* Opers get a masked IP */ |
1025 |
sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, |
1026 |
"Server %s closed the connection", |
1027 |
get_client_name(client_p, MASK_IP)); |
1028 |
|
1029 |
ilog(LOG_TYPE_IRCD, "Server %s closed the connection", |
1030 |
get_client_name(client_p, SHOW_IP)); |
1031 |
} |
1032 |
else |
1033 |
{ |
1034 |
report_error(L_ADMIN, "Lost connection to %s: %s", |
1035 |
get_client_name(client_p, SHOW_IP), current_error); |
1036 |
report_error(L_OPER, "Lost connection to %s: %s", |
1037 |
get_client_name(client_p, MASK_IP), current_error); |
1038 |
} |
1039 |
|
1040 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
1041 |
"%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 |
snprintf(errmsg, sizeof(errmsg), "Read error: %s", |
1053 |
strerror(current_error)); |
1054 |
|
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 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
1073 |
"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 |
* |
1094 |
* If a client puts themselves into "caller ID only" mode, |
1095 |
* only clients that match a client pointer they have put on |
1096 |
* the accept list will be allowed to message them. |
1097 |
* |
1098 |
* Diane Bruce, "Dianora" db@db.net |
1099 |
*/ |
1100 |
|
1101 |
void |
1102 |
del_accept(struct split_nuh_item *accept_p, struct Client *client_p) |
1103 |
{ |
1104 |
dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist); |
1105 |
|
1106 |
MyFree(accept_p->nickptr); |
1107 |
MyFree(accept_p->userptr); |
1108 |
MyFree(accept_p->hostptr); |
1109 |
MyFree(accept_p); |
1110 |
} |
1111 |
|
1112 |
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 |
|
1120 |
DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head) |
1121 |
{ |
1122 |
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 |
} |
1129 |
|
1130 |
return NULL; |
1131 |
} |
1132 |
|
1133 |
/* accept_message() |
1134 |
* |
1135 |
* 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 |
*/ |
1140 |
int |
1141 |
accept_message(struct Client *source, |
1142 |
struct Client *target) |
1143 |
{ |
1144 |
dlink_node *ptr = NULL; |
1145 |
|
1146 |
if (source == target || find_accept(source->name, source->username, |
1147 |
source->host, target, 1)) |
1148 |
return 1; |
1149 |
|
1150 |
if (HasUMode(target, UMODE_SOFTCALLERID)) |
1151 |
DLINK_FOREACH(ptr, target->channel.head) |
1152 |
if (IsMember(source, ((struct Membership *)ptr->data)->chptr)) |
1153 |
return 1; |
1154 |
|
1155 |
return 0; |
1156 |
} |
1157 |
|
1158 |
/* del_all_accepts() |
1159 |
* |
1160 |
* inputs - pointer to exiting client |
1161 |
* output - NONE |
1162 |
* side effects - Walk through given clients acceptlist and remove all entries |
1163 |
*/ |
1164 |
void |
1165 |
del_all_accepts(struct Client *client_p) |
1166 |
{ |
1167 |
dlink_node *ptr = NULL, *next_ptr = NULL; |
1168 |
|
1169 |
DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head) |
1170 |
del_accept(ptr->data, client_p); |
1171 |
} |