1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include "private-lib-core.h"
26
27 void
lws_client_conn_wait_timeout(lws_sorted_usec_list_t * sul)28 lws_client_conn_wait_timeout(lws_sorted_usec_list_t *sul)
29 {
30 struct lws *wsi = lws_container_of(sul, struct lws,
31 sul_connect_timeout);
32
33 /*
34 * This is used to constrain the time we're willing to wait for a
35 * connection before giving up on it and retrying.
36 */
37
38 lwsl_wsi_info(wsi, "connect wait timeout has fired");
39 lws_client_connect_3_connect(wsi, NULL, NULL, 0, NULL);
40 }
41
42 void
lws_client_dns_retry_timeout(lws_sorted_usec_list_t * sul)43 lws_client_dns_retry_timeout(lws_sorted_usec_list_t *sul)
44 {
45 struct lws *wsi = lws_container_of(sul, struct lws,
46 sul_connect_timeout);
47
48 /*
49 * This limits the amount of dns lookups we will try before
50 * giving up and failing... it reuses sul_connect_timeout, which
51 * isn't officially used until we connected somewhere.
52 */
53
54 lwsl_wsi_info(wsi, "dns retry");
55 if (!lws_client_connect_2_dnsreq(wsi))
56 lwsl_wsi_notice(wsi, "DNS lookup failed");
57 }
58
59 /*
60 * Figure out if an ongoing connect() has arrived at a final disposition or not
61 *
62 * We can check using getsockopt if our connect actually completed.
63 * Posix connect() allows nonblocking to redo the connect to
64 * find out if it succeeded.
65 */
66
67 typedef enum {
68 LCCCR_CONNECTED = 1,
69 LCCCR_CONTINUE = 0,
70 LCCCR_FAILED = -1,
71 } lcccr_t;
72
73 static lcccr_t
lws_client_connect_check(struct lws * wsi,int * real_errno)74 lws_client_connect_check(struct lws *wsi, int *real_errno)
75 {
76 int en = 0;
77 #if !defined(WIN32)
78 int e;
79 socklen_t sl = sizeof(e);
80 #endif
81
82 (void)en;
83
84 /*
85 * This resets SO_ERROR after reading it. If there's an error
86 * condition, the connect definitively failed.
87 */
88
89 #if !defined(WIN32)
90 if (!getsockopt(wsi->desc.sockfd, SOL_SOCKET, SO_ERROR, &e, &sl)) {
91 en = LWS_ERRNO;
92 if (!e) {
93 lwsl_wsi_debug(wsi, "getsockopt: conn OK errno %d", en);
94
95 return LCCCR_CONNECTED;
96 }
97
98 lwsl_wsi_notice(wsi, "getsockopt fd %d says e %d",
99 wsi->desc.sockfd, e);
100
101 *real_errno = e;
102
103 return LCCCR_FAILED;
104 }
105
106 #else
107
108 if (!connect(wsi->desc.sockfd, (const struct sockaddr *)&wsi->sa46_peer.sa4,
109 #if defined(WIN32)
110 sizeof(struct sockaddr)))
111 #else
112 0))
113 #endif
114
115 return LCCCR_CONNECTED;
116
117 en = LWS_ERRNO;
118
119 if (en == WSAEISCONN) /* already connected */
120 return LCCCR_CONNECTED;
121
122 if (en == WSAEALREADY) {
123 /* reset the POLLOUT wait */
124 if (lws_change_pollfd(wsi, 0, LWS_POLLOUT))
125 lwsl_wsi_notice(wsi, "pollfd failed");
126 }
127
128 if (!en || en == WSAEINVAL ||
129 en == WSAEWOULDBLOCK ||
130 en == WSAEALREADY) {
131 lwsl_wsi_debug(wsi, "errno %d", en);
132 return LCCCR_CONTINUE;
133 }
134 #endif
135
136 lwsl_wsi_notice(wsi, "connect check FAILED: %d",
137 *real_errno || en);
138
139 return LCCCR_FAILED;
140 }
141
142 /*
143 * We come here to fire off a connect, and to check its disposition later.
144 *
145 * If it did not complete before the individual attempt timeout, we will try to
146 * connect again with the next dns result.
147 */
148
149 struct lws *
lws_client_connect_3_connect(struct lws * wsi,const char * ads,const struct addrinfo * result,int n,void * opaque)150 lws_client_connect_3_connect(struct lws *wsi, const char *ads,
151 const struct addrinfo *result, int n, void *opaque)
152 {
153 #if defined(LWS_WITH_UNIX_SOCK)
154 struct sockaddr_un sau;
155 #endif
156 struct lws_context_per_thread *pt = &wsi->a.context->pt[(int)wsi->tsi];
157 const char *cce = "Unable to connect", *iface;
158 const struct sockaddr *psa = NULL;
159 uint16_t port = wsi->conn_port;
160 lws_dns_sort_t *curr;
161 ssize_t plen = 0;
162 lws_dll2_t *d;
163 char dcce[48];
164 #if defined(LWS_WITH_SYS_FAULT_INJECTION)
165 int cfail;
166 #endif
167 int m, af = 0;
168
169 /*
170 * If we come here with result set, we need to convert getaddrinfo
171 * results to a lws_dns_sort_t list one time and free the results.
172 *
173 * We use this pattern because ASYNC_DNS will callback here with the
174 * results when it gets them (and may come here more than once, eg, for
175 * AAAA then A or vice-versa)
176 */
177
178 if (result) {
179 lws_sul_cancel(&wsi->sul_connect_timeout);
180
181 #if defined(LWS_WITH_CONMON)
182 /* append a copy from before the sorting */
183 lws_conmon_append_copy_new_dns_results(wsi, result);
184 #endif
185
186 lws_sort_dns(wsi, result);
187 #if defined(LWS_WITH_SYS_ASYNC_DNS)
188 lws_async_dns_freeaddrinfo(&result);
189 #else
190 freeaddrinfo((struct addrinfo *)result);
191 #endif
192 result = NULL;
193 }
194
195 #if defined(LWS_WITH_UNIX_SOCK)
196 memset(&sau, 0, sizeof(sau));
197 #endif
198
199 /*
200 * async dns calls back here for everybody who cares when it gets a
201 * result... but if we are piggybacking, we do not want to connect
202 * ourselves
203 */
204
205 if (!lws_dll2_is_detached(&wsi->dll2_cli_txn_queue))
206 return wsi;
207
208 if (n && /* calling back with a problem */
209 !wsi->dns_sorted_list.count && /* there's no results */
210 !lws_socket_is_valid(wsi->desc.sockfd) && /* no attempt ongoing */
211 !wsi->speculative_connect_owner.count /* no spec attempt */ ) {
212 lwsl_wsi_notice(wsi, "dns lookup failed %d", n);
213
214 /*
215 * DNS lookup itself failed... let's try again until we
216 * timeout
217 */
218
219 lwsi_set_state(wsi, LRS_UNCONNECTED);
220 lws_sul_schedule(wsi->a.context, 0, &wsi->sul_connect_timeout,
221 lws_client_dns_retry_timeout,
222 LWS_USEC_PER_SEC);
223 return wsi;
224
225 // cce = "dns lookup failed";
226 // goto oom4;
227 }
228
229 /*
230 * We come back here again when we think the connect() may have
231 * completed one way or the other, we can't proceed until we know we
232 * actually connected.
233 */
234
235 if (lwsi_state(wsi) == LRS_WAITING_CONNECT &&
236 lws_socket_is_valid(wsi->desc.sockfd)) {
237
238 if (!wsi->dns_sorted_list.count &&
239 !wsi->sul_connect_timeout.list.owner)
240 /* no dns results and no ongoing timeout for one */
241 goto connect_to;
242
243 /*
244 * If the connection failed, the OS-level errno may be
245 * something like EINPROGRESS rather than the actual problem
246 * that prevented a connection. This value will represent the
247 * ��real�� problem that we should report to the caller.
248 */
249 int real_errno = 0;
250
251 switch (lws_client_connect_check(wsi, &real_errno)) {
252 case LCCCR_CONNECTED:
253 /*
254 * Oh, it has happened...
255 */
256 goto conn_good;
257 case LCCCR_CONTINUE:
258 return NULL;
259 default:
260 if (!real_errno)
261 real_errno = LWS_ERRNO;
262 lws_snprintf(dcce, sizeof(dcce), "conn fail: %d",
263 real_errno);
264
265 cce = dcce;
266 lwsl_wsi_debug(wsi, "%s", dcce);
267 lws_metrics_caliper_report(wsi->cal_conn, METRES_NOGO);
268 goto try_next_dns_result_fds;
269 }
270 }
271
272 #if defined(LWS_WITH_UNIX_SOCK)
273
274 if (ads && *ads == '+') {
275 ads++;
276 memset(&wsi->sa46_peer, 0, sizeof(wsi->sa46_peer));
277 af = sau.sun_family = AF_UNIX;
278 strncpy(sau.sun_path, ads, sizeof(sau.sun_path));
279 sau.sun_path[sizeof(sau.sun_path) - 1] = '\0';
280
281 lwsl_wsi_info(wsi, "Unix skt: %s", ads);
282
283 if (sau.sun_path[0] == '@')
284 sau.sun_path[0] = '\0';
285
286 goto ads_known;
287 }
288 #endif
289
290 #if defined(LWS_WITH_SYS_ASYNC_DNS)
291 if (n == LADNS_RET_FAILED) {
292 lwsl_wsi_notice(wsi, "adns failed %s", ads);
293 /*
294 * Caller that is giving us LADNS_RET_FAILED will deal
295 * with cleanup
296 */
297 return NULL;
298 }
299 #endif
300
301 /*
302 * Let's try directly connecting to each of the results in turn until
303 * one works, or we run out of results...
304 *
305 * We have a sorted dll2 list with the head one most preferable
306 */
307
308 next_dns_result:
309
310 cce = "Unable to connect";
311
312 if (!wsi->dns_sorted_list.count)
313 goto failed1;
314
315 /*
316 * Copy the wsi head sorted dns result into the wsi->sa46_peer, and
317 * remove and free the original from the sorted list
318 */
319
320 d = lws_dll2_get_head(&wsi->dns_sorted_list);
321 curr = lws_container_of(d, lws_dns_sort_t, list);
322
323 lws_dll2_remove(&curr->list);
324 wsi->sa46_peer = curr->dest;
325 #if defined(LWS_WITH_NETLINK)
326 wsi->peer_route_uidx = curr->uidx;
327 lwsl_wsi_info(wsi, "peer_route_uidx %d", wsi->peer_route_uidx);
328 #endif
329
330 lws_free(curr);
331
332 sa46_sockport(&wsi->sa46_peer, htons(port));
333
334 psa = sa46_sockaddr(&wsi->sa46_peer);
335 n = (int)sa46_socklen(&wsi->sa46_peer);
336
337 #if defined(LWS_WITH_UNIX_SOCK)
338 ads_known:
339 #endif
340
341 /*
342 * Now we prepared psa, if not already connecting, create the related
343 * socket and add to the fds
344 */
345
346 if (!lws_socket_is_valid(wsi->desc.sockfd)) {
347
348 if (wsi->a.context->event_loop_ops->check_client_connect_ok &&
349 wsi->a.context->event_loop_ops->check_client_connect_ok(wsi)
350 ) {
351 cce = "waiting for event loop watcher to close";
352 goto oom4;
353 }
354
355 #if defined(LWS_WITH_UNIX_SOCK)
356 af = 0;
357 if (wsi->unix_skt) {
358 af = AF_UNIX;
359 wsi->desc.sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
360 }
361 else
362 #endif
363 {
364 af = wsi->sa46_peer.sa4.sin_family;
365 wsi->desc.sockfd = socket(wsi->sa46_peer.sa4.sin_family,
366 SOCK_STREAM, 0);
367 }
368
369 if (!lws_socket_is_valid(wsi->desc.sockfd)) {
370 lws_snprintf(dcce, sizeof(dcce),
371 "conn fail: skt creation: errno %d",
372 LWS_ERRNO);
373 cce = dcce;
374 lwsl_wsi_warn(wsi, "%s", dcce);
375 goto try_next_dns_result;
376 }
377
378 if (lws_plat_set_socket_options(wsi->a.vhost, wsi->desc.sockfd,
379 #if defined(LWS_WITH_UNIX_SOCK)
380 wsi->unix_skt)) {
381 #else
382 0)) {
383 #endif
384 lws_snprintf(dcce, sizeof(dcce),
385 "conn fail: skt options: errno %d",
386 LWS_ERRNO);
387 cce = dcce;
388 lwsl_wsi_warn(wsi, "%s", dcce);
389 goto try_next_dns_result_closesock;
390 }
391
392 /* apply requested socket options */
393 if (lws_plat_set_socket_options_ip(wsi->desc.sockfd,
394 wsi->c_pri, wsi->flags))
395 lwsl_wsi_warn(wsi, "unable to set ip options");
396
397 lwsl_wsi_debug(wsi, "WAITING_CONNECT");
398 lwsi_set_state(wsi, LRS_WAITING_CONNECT);
399
400 if (wsi->a.context->event_loop_ops->sock_accept)
401 if (wsi->a.context->event_loop_ops->sock_accept(wsi)) {
402 lws_snprintf(dcce, sizeof(dcce),
403 "conn fail: sock accept");
404 cce = dcce;
405 lwsl_wsi_warn(wsi, "%s", dcce);
406 goto try_next_dns_result_closesock;
407 }
408
409 lws_pt_lock(pt, __func__);
410 if (__insert_wsi_socket_into_fds(wsi->a.context, wsi)) {
411 lws_snprintf(dcce, sizeof(dcce),
412 "conn fail: insert fd");
413 cce = dcce;
414 lws_pt_unlock(pt);
415 goto try_next_dns_result_closesock;
416 }
417 lws_pt_unlock(pt);
418
419 /*
420 * The fd + wsi combination is entered into the wsi tables
421 * at this point, with a pollfd
422 *
423 * Past here, we can't simply free the structs as error
424 * handling as oom4 does.
425 *
426 * We can run the whole close flow, or unpick the fds inclusion
427 * and anything else we have done.
428 */
429
430 if (lws_change_pollfd(wsi, 0, LWS_POLLIN)) {
431 lws_snprintf(dcce, sizeof(dcce),
432 "conn fail: change pollfd");
433 cce = dcce;
434 goto try_next_dns_result_fds;
435 }
436
437 if (!wsi->a.protocol)
438 wsi->a.protocol = &wsi->a.vhost->protocols[0];
439
440 lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_CONNECT_RESPONSE,
441 wsi->a.vhost->connect_timeout_secs);
442
443 iface = lws_wsi_client_stash_item(wsi, CIS_IFACE,
444 _WSI_TOKEN_CLIENT_IFACE);
445
446 if (iface && *iface) {
447 m = lws_socket_bind(wsi->a.vhost, wsi, wsi->desc.sockfd,
448 0, iface, af);
449 if (m < 0) {
450 lws_snprintf(dcce, sizeof(dcce),
451 "conn fail: socket bind");
452 cce = dcce;
453 goto try_next_dns_result_fds;
454 }
455 }
456 }
457
458 #if defined(LWS_WITH_UNIX_SOCK)
459 if (wsi->unix_skt) {
460 psa = (const struct sockaddr *)&sau;
461 if (sau.sun_path[0])
462 n = (int)(sizeof(uint16_t) + strlen(sau.sun_path));
463 else
464 n = (int)(sizeof(uint16_t) +
465 strlen(&sau.sun_path[1]) + 1);
466 } else
467 #endif
468
469 if (!psa) /* coverity */
470 goto try_next_dns_result_fds;
471
472 /*
473 * The actual connection attempt
474 */
475
476 #if defined(LWS_ESP_PLATFORM)
477 errno = 0;
478 #endif
479
480 /* grab a copy for peer tracking */
481 #if defined(LWS_WITH_UNIX_SOCK)
482 if (!wsi->unix_skt)
483 #endif
484 memmove(&wsi->sa46_peer, psa, (unsigned int)n);
485
486 /*
487 * Finally, make the actual connection attempt
488 */
489
490 #if defined(LWS_WITH_SYS_METRICS)
491 if (wsi->cal_conn.mt) {
492 lws_metrics_caliper_report(wsi->cal_conn, METRES_NOGO);
493 }
494 lws_metrics_caliper_bind(wsi->cal_conn, wsi->a.context->mt_conn_tcp);
495 #endif
496
497 wsi->socket_is_permanently_unusable = 0;
498
499 if (lws_fi(&wsi->fic, "conn_cb_rej") ||
500 user_callback_handle_rxflow(wsi->a.protocol->callback, wsi,
501 LWS_CALLBACK_CONNECTING, wsi->user_space,
502 (void *)(intptr_t)wsi->desc.sockfd, 0)) {
503 lwsl_wsi_info(wsi, "CONNECTION CB closed");
504 goto failed1;
505 }
506
507 #if defined(LWS_WITH_SYS_FAULT_INJECTION)
508 cfail = lws_fi(&wsi->fic, "connfail");
509 if (cfail)
510 m = -1;
511 else
512 #endif
513 m = connect(wsi->desc.sockfd, (const struct sockaddr *)psa,
514 (socklen_t)n);
515
516 #if defined(LWS_WITH_CONMON)
517 wsi->conmon_datum = lws_now_usecs();
518 wsi->conmon.ciu_sockconn = 0;
519 #endif
520
521 if (m == -1) {
522 /*
523 * Since we're nonblocking, connect not having completed is not
524 * necessarily indicating any problem... we have to look at
525 * either errno or the socket to understand if we actually
526 * failed already...
527 */
528
529 int errno_copy = LWS_ERRNO;
530
531 #if defined(LWS_WITH_SYS_FAULT_INJECTION)
532 if (cfail)
533 /* fake an abnormal, fatal situation */
534 errno_copy = 999;
535 #endif
536
537 lwsl_wsi_debug(wsi, "connect: fd %d errno: %d",
538 wsi->desc.sockfd, errno_copy);
539
540 if (errno_copy &&
541 errno_copy != LWS_EALREADY &&
542 errno_copy != LWS_EINPROGRESS &&
543 errno_copy != LWS_EWOULDBLOCK
544 #ifdef _WIN32
545 && errno_copy != WSAEINVAL
546 && errno_copy != WSAEISCONN
547 #endif
548 ) {
549 /*
550 * The connect() failed immediately...
551 */
552
553 #if defined(LWS_WITH_CONMON)
554 wsi->conmon.ciu_sockconn = (lws_conmon_interval_us_t)
555 (lws_now_usecs() - wsi->conmon_datum);
556 #endif
557
558 lws_metrics_caliper_report(wsi->cal_conn, METRES_NOGO);
559
560 #if defined(_DEBUG)
561 #if defined(LWS_WITH_UNIX_SOCK)
562 if (!wsi->unix_skt) {
563 #endif
564
565 char nads[48];
566
567 lws_sa46_write_numeric_address(&wsi->sa46_peer, nads,
568 sizeof(nads));
569
570 lws_snprintf(dcce, sizeof(dcce),
571 "conn fail: errno %d: %s:%d",
572 errno_copy, nads, port);
573 cce = dcce;
574
575 wsi->sa46_peer.sa4.sin_family = 0;
576 lwsl_wsi_info(wsi, "%s", cce);
577 #if defined(LWS_WITH_UNIX_SOCK)
578 } else {
579 lws_snprintf(dcce, sizeof(dcce),
580 "conn fail: errno %d: UDS %s",
581 errno_copy, ads);
582 cce = dcce;
583 }
584 #endif
585 #endif
586
587 goto try_next_dns_result_fds;
588 }
589
590 #if defined(WIN32)
591 if (lws_plat_check_connection_error(wsi))
592 goto try_next_dns_result_fds;
593
594 if (errno_copy == WSAEISCONN)
595 goto conn_good;
596 #endif
597
598 /*
599 * The connection attempt is ongoing asynchronously... let's set
600 * a specialized timeout for this connect attempt completion, it
601 * uses wsi->sul_connect_timeout just for this purpose
602 */
603
604 lws_sul_schedule(wsi->a.context, 0, &wsi->sul_connect_timeout,
605 lws_client_conn_wait_timeout,
606 wsi->a.context->timeout_secs *
607 LWS_USEC_PER_SEC);
608
609 /*
610 * must do specifically a POLLOUT poll to hear
611 * about the connect completion
612 */
613 if (lws_change_pollfd(wsi, 0, LWS_POLLOUT))
614 goto try_next_dns_result_fds;
615
616 return wsi;
617 }
618
619 conn_good:
620
621 /*
622 * The connection has happened
623 */
624
625 #if defined(LWS_WITH_CONMON)
626 wsi->conmon.ciu_sockconn = (lws_conmon_interval_us_t)
627 (lws_now_usecs() - wsi->conmon_datum);
628 #endif
629
630 #if !defined(LWS_PLAT_OPTEE)
631 {
632 socklen_t salen = sizeof(wsi->sa46_local);
633 #if defined(_DEBUG)
634 char buf[64];
635 #endif
636 if (getsockname((int)wsi->desc.sockfd,
637 (struct sockaddr *)&wsi->sa46_local,
638 &salen) == -1)
639 lwsl_warn("getsockname: %s\n", strerror(LWS_ERRNO));
640 #if defined(_DEBUG)
641 #if defined(LWS_WITH_UNIX_SOCK)
642 if (wsi->unix_skt)
643 buf[0] = '\0';
644 else
645 #endif
646 lws_sa46_write_numeric_address(&wsi->sa46_local, buf, sizeof(buf));
647
648 lwsl_wsi_info(wsi, "source ads %s", buf);
649 #endif
650 }
651 #endif
652
653 lws_sul_cancel(&wsi->sul_connect_timeout);
654 lws_metrics_caliper_report(wsi->cal_conn, METRES_GO);
655
656 lws_addrinfo_clean(wsi);
657
658 if (wsi->a.protocol)
659 wsi->a.protocol->callback(wsi, LWS_CALLBACK_WSI_CREATE,
660 wsi->user_space, NULL, 0);
661
662 lwsl_wsi_debug(wsi, "going into connect_4");
663
664 return lws_client_connect_4_established(wsi, NULL, plen);
665
666 oom4:
667 /*
668 * We get here if we're trying to clean up a connection attempt that
669 * didn't make it as far as getting inserted into the wsi / fd tables
670 */
671
672 if (lwsi_role_client(wsi) && wsi->a.protocol
673 /* && lwsi_state_est(wsi) */)
674 lws_inform_client_conn_fail(wsi,(void *)cce, strlen(cce));
675
676 /* take care that we might be inserted in fds already */
677 if (wsi->position_in_fds_table != LWS_NO_FDS_POS)
678 /* do the full wsi close flow */
679 goto failed1;
680
681 lws_metrics_caliper_report(wsi->cal_conn, METRES_NOGO);
682
683 /*
684 * We can't be an active client connection any more, if we thought
685 * that was what we were going to be doing. It should be if we are
686 * failing by oom4 path, we are still called by
687 * lws_client_connect_via_info() and will be returning NULL to that,
688 * so nobody else should have had a chance to queue on us.
689 */
690 {
691 struct lws_vhost *vhost = wsi->a.vhost;
692 lws_sockfd_type sfd = wsi->desc.sockfd;
693
694 //lws_vhost_lock(vhost);
695 __lws_free_wsi(wsi); /* acquires vhost lock in wsi reset */
696 //lws_vhost_unlock(vhost);
697
698 sanity_assert_no_wsi_traces(vhost->context, wsi);
699 sanity_assert_no_sockfd_traces(vhost->context, sfd);
700 }
701
702 return NULL;
703
704 connect_to:
705 /*
706 * It looks like the sul_connect_timeout fired
707 */
708 lwsl_wsi_info(wsi, "abandoning connect due to timeout");
709
710 try_next_dns_result_fds:
711 lws_pt_lock(pt, __func__);
712 __remove_wsi_socket_from_fds(wsi);
713 lws_pt_unlock(pt);
714
715 try_next_dns_result_closesock:
716 /*
717 * We are killing the socket but leaving
718 */
719 compatible_close(wsi->desc.sockfd);
720 wsi->desc.sockfd = LWS_SOCK_INVALID;
721
722 try_next_dns_result:
723 lws_sul_cancel(&wsi->sul_connect_timeout);
724 if (lws_dll2_get_head(&wsi->dns_sorted_list))
725 goto next_dns_result;
726
727 lws_addrinfo_clean(wsi);
728 lws_inform_client_conn_fail(wsi, (void *)cce, strlen(cce));
729
730 failed1:
731 lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "client_connect3");
732
733 return NULL;
734 }
735