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