1 /*
2  * Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "gmid.h"
18 
19 #include <sys/stat.h>
20 #include <sys/un.h>
21 
22 #include <assert.h>
23 #include <ctype.h>
24 #include <errno.h>
25 #include <event.h>
26 #include <fcntl.h>
27 #include <fnmatch.h>
28 #include <limits.h>
29 #include <string.h>
30 
31 #include "log.h"
32 #include "proc.h"
33 
34 #define MIN(a, b)	((a) < (b) ? (a) : (b))
35 
36 #ifndef nitems
37 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
38 #endif
39 
40 int shutting_down;
41 
42 static struct tls	*ctx;
43 
44 #ifdef SIGINFO
45 static struct event siginfo;
46 #endif
47 static struct event sigusr2;
48 
49 int connected_clients;
50 
51 /*
52  * This function is not publicy exported because it is a hack until libtls
53  * has a proper privsep setup.
54  */
55 void tls_config_use_fake_private_key(struct tls_config *);
56 
57 static inline int matches(const char*, const char*);
58 
59 static int	 check_path(struct client*, const char*, int*);
60 static void	 open_file(struct client*);
61 static void	 handle_handshake(int, short, void*);
62 static const char *strip_path(const char*, int);
63 static void	 fmt_sbuf(const char*, struct client*, const char*);
64 static int	 apply_block_return(struct client*);
65 static int	 check_matching_certificate(X509_STORE *, struct client *);
66 static int	 apply_reverse_proxy(struct client *);
67 static int	 apply_fastcgi(struct client*);
68 static int	 apply_require_ca(struct client*);
69 static void	 open_dir(struct client*);
70 static void	 redirect_canonical_dir(struct client*);
71 
72 static void	 client_tls_readcb(int, short, void *);
73 static void	 client_tls_writecb(int, short, void *);
74 
75 static void	 client_read(struct bufferevent *, void *);
76 void		 client_write(struct bufferevent *, void *);
77 static void	 client_error(struct bufferevent *, short, void *);
78 
79 static void	 client_close_ev(int, short, void *);
80 
81 static void	 handle_siginfo(int, short, void*);
82 
83 static int	 server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
84 static int	 server_dispatch_crypto(int, struct privsep_proc *, struct imsg *);
85 static int	 server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
86 
87 static struct privsep_proc procs[] = {
88 	{ "parent",	PROC_PARENT,	server_dispatch_parent },
89 	{ "crypto",	PROC_CRYPTO,	server_dispatch_crypto },
90 	{ "logger",	PROC_LOGGER,	server_dispatch_logger },
91 };
92 
93 static uint32_t server_client_id;
94 
95 struct client_tree_id clients;
96 
97 static inline int
98 matches(const char *pattern, const char *path)
99 {
100 	if (*path == '/')
101 		path++;
102 	return !fnmatch(pattern, path, 0);
103 }
104 
105 const char *
106 vhost_lang(struct vhost *v, const char *path)
107 {
108 	struct location *loc;
109 
110 	if (v == NULL || path == NULL)
111 		return NULL;
112 
113 	loc = TAILQ_FIRST(&v->locations);
114 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
115 		if (*loc->lang != '\0') {
116 			if (matches(loc->match, path))
117 				return loc->lang;
118 		}
119 	}
120 
121 	loc = TAILQ_FIRST(&v->locations);
122 	if (*loc->lang == '\0')
123 		return NULL;
124 	return loc->lang;
125 }
126 
127 const char *
128 vhost_default_mime(struct vhost *v, const char *path)
129 {
130 	struct location *loc;
131 	const char *default_mime = "application/octet-stream";
132 
133 	if (v == NULL || path == NULL)
134 		return default_mime;
135 
136 	loc = TAILQ_FIRST(&v->locations);
137 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
138 		if (*loc->default_mime != '\0') {
139 			if (matches(loc->match, path))
140 				return loc->default_mime;
141 		}
142 	}
143 
144 	loc = TAILQ_FIRST(&v->locations);
145 	if (*loc->default_mime != '\0')
146 		return loc->default_mime;
147 	return default_mime;
148 }
149 
150 const char *
151 vhost_index(struct vhost *v, const char *path)
152 {
153 	struct location *loc;
154 	const char *index = "index.gmi";
155 
156 	if (v == NULL || path == NULL)
157 		return index;
158 
159 	loc = TAILQ_FIRST(&v->locations);
160 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
161 		if (*loc->index != '\0') {
162 			if (matches(loc->match, path))
163 				return loc->index;
164 		}
165 	}
166 
167 	loc = TAILQ_FIRST(&v->locations);
168 	if (*loc->index != '\0')
169 		return loc->index;
170 	return index;
171 }
172 
173 int
174 vhost_auto_index(struct vhost *v, const char *path)
175 {
176 	struct location *loc;
177 
178 	if (v == NULL || path == NULL)
179 		return 0;
180 
181 	loc = TAILQ_FIRST(&v->locations);
182 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
183 		if (loc->auto_index != 0) {
184 			if (matches(loc->match, path))
185 				return loc->auto_index == 1;
186 		}
187 	}
188 
189 	loc = TAILQ_FIRST(&v->locations);
190 	return loc->auto_index == 1;
191 }
192 
193 int
194 vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
195 {
196 	struct location *loc;
197 
198 	if (v == NULL || path == NULL)
199 		return 0;
200 
201 	loc = TAILQ_FIRST(&v->locations);
202 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
203 		if (loc->block_code != 0) {
204 			if (matches(loc->match, path)) {
205 				*code = loc->block_code;
206 				*fmt = loc->block_fmt;
207 				return 1;
208 			}
209 		}
210 	}
211 
212 	loc = TAILQ_FIRST(&v->locations);
213 	*code = loc->block_code;
214 	*fmt = loc->block_fmt;
215 	return loc->block_code != 0;
216 }
217 
218 int
219 vhost_fastcgi(struct vhost *v, const char *path)
220 {
221 	struct location *loc;
222 
223 	if (v == NULL || path == NULL)
224 		return -1;
225 
226 	loc = TAILQ_FIRST(&v->locations);
227 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
228 		if (loc->fcgi != -1)
229 			if (matches(loc->match, path))
230 				return loc->fcgi;
231 	}
232 
233 	loc = TAILQ_FIRST(&v->locations);
234 	return loc->fcgi;
235 }
236 
237 int
238 vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
239 {
240 	struct location *loc;
241 	size_t		 l = 0;
242 
243 	if (v == NULL || path == NULL)
244 		return -1;
245 
246 	loc = TAILQ_FIRST(&v->locations);
247 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
248 		l++;
249 		if (loc->dirfd != -1)
250 			if (matches(loc->match, path)) {
251 				*retloc = l;
252 				return loc->dirfd;
253 			}
254 	}
255 
256 	*retloc = 0;
257 	loc = TAILQ_FIRST(&v->locations);
258 	return loc->dirfd;
259 }
260 
261 int
262 vhost_strip(struct vhost *v, const char *path)
263 {
264 	struct location *loc;
265 
266 	if (v == NULL || path == NULL)
267 		return 0;
268 
269 	loc = TAILQ_FIRST(&v->locations);
270 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
271 		if (loc->strip != 0) {
272 			if (matches(loc->match, path))
273 				return loc->strip;
274 		}
275 	}
276 
277 	loc = TAILQ_FIRST(&v->locations);
278 	return loc->strip;
279 }
280 
281 X509_STORE *
282 vhost_require_ca(struct vhost *v, const char *path)
283 {
284 	struct location *loc;
285 
286 	if (v == NULL || path == NULL)
287 		return NULL;
288 
289 	loc = TAILQ_FIRST(&v->locations);
290 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
291 		if (loc->reqca != NULL) {
292 			if (matches(loc->match, path))
293 				return loc->reqca;
294 		}
295 	}
296 
297 	loc = TAILQ_FIRST(&v->locations);
298 	return loc->reqca;
299 }
300 
301 int
302 vhost_disable_log(struct vhost *v, const char *path)
303 {
304 	struct location *loc;
305 
306 	if (v == NULL || path == NULL)
307 		return 0;
308 
309 	loc = TAILQ_FIRST(&v->locations);
310 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
311 		if (loc->disable_log && matches(loc->match, path))
312 				return 1;
313 	}
314 
315 	loc = TAILQ_FIRST(&v->locations);
316 	return loc->disable_log;
317 }
318 
319 static int
320 check_path(struct client *c, const char *path, int *fd)
321 {
322 	struct stat sb;
323 	const char *p;
324 	int dirfd, strip;
325 
326 	assert(path != NULL);
327 
328 	/*
329 	 * in send_dir we add an initial / (to be redirect-friendly),
330 	 * but here we want to skip it
331 	 */
332 	if (*path == '/')
333 		path++;
334 
335 	strip = vhost_strip(c->host, path);
336 	p = strip_path(path, strip);
337 
338 	if (*p == '/')
339 		p = p+1;
340 	if (*p == '\0')
341 		p = ".";
342 
343 	dirfd = vhost_dirfd(c->host, path, &c->loc);
344 	log_debug("check_path: strip=%d path=%s original=%s",
345 	    strip, p, path);
346 	if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1) {
347 		if (errno == EACCES)
348 			log_info("can't open %s: %s", p, strerror(errno));
349 		return FILE_MISSING;
350 	}
351 
352 	if (fstat(*fd, &sb) == -1) {
353 		log_warn("fstat %s", path);
354 		return FILE_MISSING;
355 	}
356 
357 	if (S_ISDIR(sb.st_mode))
358 		return FILE_DIRECTORY;
359 
360 	return FILE_EXISTS;
361 }
362 
363 static void
364 open_file(struct client *c)
365 {
366 	switch (check_path(c, c->iri.path, &c->pfd)) {
367 	case FILE_EXISTS:
368 		c->type = REQUEST_FILE;
369 		start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
370 		return;
371 
372 	case FILE_DIRECTORY:
373 		open_dir(c);
374 		return;
375 
376 	case FILE_MISSING:
377 		start_reply(c, NOT_FOUND, "not found");
378 		return;
379 
380 	default:
381 		/* unreachable */
382 		abort();
383 	}
384 }
385 
386 void
387 mark_nonblock(int fd)
388 {
389 	int flags;
390 
391 	if ((flags = fcntl(fd, F_GETFL)) == -1)
392 		fatal("fcntl(F_GETFL)");
393 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
394 		fatal("fcntl(F_SETFL)");
395 }
396 
397 static void
398 handle_handshake(int fd, short ev, void *d)
399 {
400 	struct client *c = d;
401 	struct conf *conf = c->conf;
402 	struct vhost *h;
403 	struct alist *a;
404 	const char *servname;
405 	const char *parse_err = "unknown error";
406 
407 	switch (tls_handshake(c->ctx)) {
408 	case 0:  /* success */
409 	case -1: /* already handshaked */
410 		break;
411 	case TLS_WANT_POLLIN:
412 		event_once(c->fd, EV_READ, handle_handshake, c, NULL);
413 		return;
414 	case TLS_WANT_POLLOUT:
415 		event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
416 		return;
417 	default:
418 		/* unreachable */
419 		abort();
420 	}
421 
422 	c->bev = bufferevent_new(fd, client_read, client_write,
423 	    client_error, c);
424 	if (c->bev == NULL)
425 		fatal("%s: failed to allocate client buffer", __func__);
426 
427 	event_set(&c->bev->ev_read, c->fd, EV_READ,
428 	    client_tls_readcb, c->bev);
429 	event_set(&c->bev->ev_write, c->fd, EV_WRITE,
430 	    client_tls_writecb, c->bev);
431 
432 #if HAVE_LIBEVENT2
433 	evbuffer_unfreeze(c->bev->input, 0);
434 	evbuffer_unfreeze(c->bev->output, 1);
435 #endif
436 
437 	if ((servname = tls_conn_servername(c->ctx)) == NULL) {
438 		log_debug("handshake: missing SNI");
439 		goto err;
440 	}
441 
442 	if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
443 		log_info("puny_decode: %s", parse_err);
444 		goto err;
445 	}
446 
447 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
448 		if (matches(h->domain, c->domain))
449 			goto found;
450 		TAILQ_FOREACH(a, &h->aliases, aliases) {
451 			if (matches(a->alias, c->domain))
452 				goto found;
453 		}
454 	}
455 
456 found:
457 	log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
458 	    servname != NULL ? servname : "(null)",
459 	    c->domain,
460 	    h != NULL ? h->domain : "(null)");
461 
462 	if (h != NULL) {
463 		c->host = h;
464 		bufferevent_enable(c->bev, EV_READ);
465 		return;
466 	}
467 
468 err:
469 	start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
470 }
471 
472 static const char *
473 strip_path(const char *path, int strip)
474 {
475 	char *t;
476 
477 	while (strip > 0) {
478 		if ((t = strchr(path, '/')) == NULL) {
479 			path = strchr(path, '\0');
480 			break;
481 		}
482 		path = t;
483 		strip--;
484 	}
485 
486 	return path;
487 }
488 
489 static void
490 fmt_sbuf(const char *fmt, struct client *c, const char *path)
491 {
492 	struct conf *conf = c->conf;
493 	size_t i;
494 	char buf[32];
495 
496 	memset(buf, 0, sizeof(buf));
497 	for (i = 0; *fmt; ++fmt) {
498 		if (i == sizeof(buf)-1 || *fmt == '%') {
499 			strlcat(c->sbuf, buf, sizeof(c->sbuf));
500 			memset(buf, 0, sizeof(buf));
501 			i = 0;
502 		}
503 
504 		if (*fmt != '%') {
505 			buf[i++] = *fmt;
506 			continue;
507 		}
508 
509 		switch (*++fmt) {
510 		case '%':
511 			strlcat(c->sbuf, "%", sizeof(c->sbuf));
512 			break;
513 		case 'p':
514 			if (*path != '/')
515 				strlcat(c->sbuf, "/", sizeof(c->sbuf));
516 			strlcat(c->sbuf, path, sizeof(c->sbuf));
517 			break;
518 		case 'q':
519 			strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
520 			break;
521 		case 'P':
522 			snprintf(buf, sizeof(buf), "%d", conf->port);
523 			strlcat(c->sbuf, buf, sizeof(c->sbuf));
524 			memset(buf, 0, sizeof(buf));
525 			break;
526 		case 'N':
527 			strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
528 			break;
529 		default:
530 			fatalx("%s: unknown fmt specifier %c",
531 			    __func__, *fmt);
532 		}
533 	}
534 
535 	if (i != 0)
536 		strlcat(c->sbuf, buf, sizeof(c->sbuf));
537 }
538 
539 /* 1 if a matching `block return' (and apply it), 0 otherwise */
540 static int
541 apply_block_return(struct client *c)
542 {
543 	const char *fmt, *path;
544 	int code;
545 
546 	if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
547 		return 0;
548 
549 	path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
550 	fmt_sbuf(fmt, c, path);
551 
552 	start_reply(c, code, c->sbuf);
553 	return 1;
554 }
555 
556 static struct proxy *
557 matched_proxy(struct client *c)
558 {
559 	struct proxy	*p;
560 	const char	*proto;
561 	const char	*host;
562 	const char	*port;
563 
564 	TAILQ_FOREACH(p, &c->host->proxies, proxies) {
565 		if (*(proto = p->match_proto) == '\0')
566 			proto = "gemini";
567 		if (*(host = p->match_host) == '\0')
568 			host = "*";
569 		if (*(port = p->match_port) == '\0')
570 			port = "*";
571 
572 		if (matches(proto, c->iri.schema) &&
573 		    matches(host, c->domain) &&
574 		    matches(port, c->iri.port))
575 			return p;
576 	}
577 
578 	return NULL;
579 }
580 
581 static int
582 check_matching_certificate(X509_STORE *store, struct client *c)
583 {
584 	const uint8_t	*cert;
585 	size_t		 len;
586 
587 	if (!tls_peer_cert_provided(c->ctx)) {
588 		start_reply(c, CLIENT_CERT_REQ, "client certificate required");
589 		return 1;
590 	}
591 
592 	cert = tls_peer_cert_chain_pem(c->ctx, &len);
593 	if (!validate_against_ca(store, cert, len)) {
594 		start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
595 		return 1;
596 	}
597 
598 	return 0;
599 }
600 
601 static int
602 proxy_socket(struct client *c, const char *host, const char *port)
603 {
604 	struct addrinfo hints, *res, *res0;
605 	int r, sock, save_errno;
606 	const char *cause = NULL;
607 
608 	memset(&hints, 0, sizeof(hints));
609 	hints.ai_family = AF_UNSPEC;
610 	hints.ai_socktype = SOCK_STREAM;
611 
612 	/* XXX: asr_run? :> */
613 	r = getaddrinfo(host, port, &hints, &res0);
614 	if (r != 0) {
615 		log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
616 		    host, port, gai_strerror(r));
617 		return -1;
618 	}
619 
620 	for (res = res0; res; res = res->ai_next) {
621 		sock = socket(res->ai_family, res->ai_socktype,
622 		    res->ai_protocol);
623 		if (sock == -1) {
624 			cause = "socket";
625 			continue;
626 		}
627 
628 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
629 			cause = "connect";
630 			save_errno = errno;
631 			close(sock);
632 			errno = save_errno;
633 			sock = -1;
634 			continue;
635 		}
636 
637 		break;
638 	}
639 
640 	if (sock == -1)
641 		log_warn("can't connect to %s:%s: %s", host, port, cause);
642 
643 	freeaddrinfo(res0);
644 
645 	return sock;
646 }
647 
648 /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
649 static int
650 apply_reverse_proxy(struct client *c)
651 {
652 	struct proxy	*p;
653 
654 	if ((p = matched_proxy(c)) == NULL)
655 		return 0;
656 
657 	c->proxy = p;
658 
659 	if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
660 		return 1;
661 
662 	log_debug("opening proxy connection for %s:%s",
663 	    p->host, p->port);
664 
665 	if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
666 		start_reply(c, PROXY_ERROR, "proxy error");
667 		return 1;
668 	}
669 
670 	mark_nonblock(c->pfd);
671 	if (proxy_init(c) == -1)
672 		start_reply(c, PROXY_ERROR, "proxy error");
673 
674 	return 1;
675 }
676 
677 static int
678 fcgi_open_sock(struct fcgi *f)
679 {
680 	struct sockaddr_un	addr;
681 	int			fd;
682 
683 	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
684 		log_warn("socket");
685 		return -1;
686 	}
687 
688 	memset(&addr, 0, sizeof(addr));
689 	addr.sun_family = AF_UNIX;
690 	strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
691 
692 	if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
693 		log_warn("failed to connect to %s", f->path);
694 		close(fd);
695 		return -1;
696 	}
697 
698 	return fd;
699 }
700 
701 static int
702 fcgi_open_conn(struct fcgi *f)
703 {
704 	struct addrinfo	 hints, *servinfo, *p;
705 	int		 r, sock, save_errno;
706 	const char	*cause = NULL;
707 
708 	memset(&hints, 0, sizeof(hints));
709 	hints.ai_family = AF_UNSPEC;
710 	hints.ai_socktype = SOCK_STREAM;
711 	hints.ai_flags = AI_ADDRCONFIG;
712 
713 	if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
714 		log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
715 		    gai_strerror(r));
716 		return -1;
717 	}
718 
719 	for (p = servinfo; p != NULL; p = p->ai_next) {
720 		sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
721 		if (sock == -1) {
722 			cause = "socket";
723 			continue;
724 		}
725 		if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
726 			cause = "connect";
727 			save_errno = errno;
728 			close(sock);
729 			errno = save_errno;
730 			continue;
731 		}
732 		break;
733 	}
734 
735 	if (p == NULL) {
736 		log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
737 		    cause);
738 		sock = -1;
739 	}
740 
741 	freeaddrinfo(servinfo);
742 	return sock;
743 }
744 
745 /* 1 if matching `fcgi' (and apply it), 0 otherwise */
746 static int
747 apply_fastcgi(struct client *c)
748 {
749 	int		 id, i = 0;
750 	struct fcgi	*f;
751 
752 	if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
753 		return 0;
754 
755 	TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
756 		if (i == id)
757 			break;
758 		++i;
759 	}
760 
761 	if (f == NULL) {
762 		log_warnx("can't find fcgi #%d", id);
763 		return 0;
764 	}
765 
766 	log_debug("opening fastcgi connection for (%s,%s)",
767 	    f->path, f->port);
768 
769 	if (*f->port == '\0')
770 		c->pfd = fcgi_open_sock(f);
771 	else
772 		c->pfd = fcgi_open_conn(f);
773 
774 	if (c->pfd == -1) {
775 		start_reply(c, CGI_ERROR, "CGI error");
776 		return 1;
777 	}
778 
779 	mark_nonblock(c->pfd);
780 
781 	c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
782 	    fcgi_error, c);
783 	if (c->cgibev == NULL) {
784 		start_reply(c, TEMP_FAILURE, "internal server error");
785 		return 1;
786 	}
787 
788 	bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
789 	fcgi_req(c);
790 
791 	return 1;
792 }
793 
794 /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
795 static int
796 apply_require_ca(struct client *c)
797 {
798 	X509_STORE	*store;
799 
800 	if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
801 		return 0;
802 	return check_matching_certificate(store, c);
803 }
804 
805 static void
806 open_dir(struct client *c)
807 {
808 	size_t len;
809 	int dirfd, root;
810 	char *before_file;
811 
812 	root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
813 
814 	len = strlen(c->iri.path);
815 	if (len > 0 && !ends_with(c->iri.path, "/")) {
816 		redirect_canonical_dir(c);
817 		return;
818 	}
819 
820 	strlcpy(c->sbuf, "/", sizeof(c->sbuf));
821 	strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
822 	if (!ends_with(c->sbuf, "/"))
823 		strlcat(c->sbuf, "/", sizeof(c->sbuf));
824 	before_file = strchr(c->sbuf, '\0');
825 	len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
826 	    sizeof(c->sbuf));
827 	if (len >= sizeof(c->sbuf)) {
828 		start_reply(c, TEMP_FAILURE, "internal server error");
829 		return;
830 	}
831 
832 	c->iri.path = c->sbuf;
833 
834 	/* close later unless we have to generate the dir listing */
835 	dirfd = c->pfd;
836 	c->pfd = -1;
837 
838 	switch (check_path(c, c->iri.path, &c->pfd)) {
839 	case FILE_EXISTS:
840 		c->type = REQUEST_FILE;
841 		start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
842 		break;
843 
844 	case FILE_DIRECTORY:
845 		start_reply(c, TEMP_REDIRECT, c->sbuf);
846 		break;
847 
848 	case FILE_MISSING:
849 		*before_file = '\0';
850 
851 		if (!vhost_auto_index(c->host, c->iri.path)) {
852 			start_reply(c, NOT_FOUND, "not found");
853 			break;
854 		}
855 
856 		c->type = REQUEST_DIR;
857 
858 		c->dirlen = scandir_fd(dirfd, &c->dir,
859 		    root ? select_non_dotdot : select_non_dot,
860 		    alphasort);
861 		if (c->dirlen == -1) {
862 			log_warn("scandir_fd(%d) (vhost:%s) %s",
863 			    c->pfd, c->host->domain, c->iri.path);
864 			start_reply(c, TEMP_FAILURE, "internal server error");
865 			return;
866 		}
867 		c->diroff = 0;
868 		c->off = 0;
869 
870 		start_reply(c, SUCCESS, "text/gemini");
871 		evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
872 		    "# Index of %s\n\n", c->iri.path);
873 		return;
874 
875 	default:
876 		/* unreachable */
877 		abort();
878 	}
879 
880 	close(dirfd);
881 }
882 
883 static void
884 redirect_canonical_dir(struct client *c)
885 {
886 	size_t len;
887 
888 	strlcpy(c->sbuf, "/", sizeof(c->sbuf));
889 	strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
890 	len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
891 
892 	if (len >= sizeof(c->sbuf)) {
893 		start_reply(c, TEMP_FAILURE, "internal server error");
894 		return;
895 	}
896 
897 	start_reply(c, TEMP_REDIRECT, c->sbuf);
898 }
899 
900 static void
901 client_tls_readcb(int fd, short event, void *d)
902 {
903 	struct bufferevent	*bufev = d;
904 	struct client		*client = bufev->cbarg;
905 	ssize_t			 ret;
906 	size_t			 len;
907 	int			 what = EVBUFFER_READ;
908 	int			 howmuch = IBUF_READ_SIZE;
909 	char			 buf[IBUF_READ_SIZE];
910 
911 	if (event == EV_TIMEOUT) {
912 		what |= EVBUFFER_TIMEOUT;
913 		goto err;
914 	}
915 
916 	if (bufev->wm_read.high != 0)
917 		howmuch = MIN(sizeof(buf), bufev->wm_read.high);
918 
919 	switch (ret = tls_read(client->ctx, buf, howmuch)) {
920 	case TLS_WANT_POLLIN:
921 	case TLS_WANT_POLLOUT:
922 		goto retry;
923 	case -1:
924 		what |= EVBUFFER_ERROR;
925 		goto err;
926 	}
927 	len = ret;
928 
929 	if (len == 0) {
930 		what |= EVBUFFER_EOF;
931 		goto err;
932 	}
933 
934 	if (evbuffer_add(bufev->input, buf, len) == -1) {
935 		what |= EVBUFFER_ERROR;
936 		goto err;
937 	}
938 
939 	event_add(&bufev->ev_read, NULL);
940 	if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
941 		return;
942 	if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
943 		/*
944 		 * here we could implement a read pressure policy.
945 		 */
946 	}
947 
948 	if (bufev->readcb != NULL)
949 		(*bufev->readcb)(bufev, bufev->cbarg);
950 
951 	return;
952 
953 retry:
954 	event_add(&bufev->ev_read, NULL);
955 	return;
956 
957 err:
958 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
959 }
960 
961 static void
962 client_tls_writecb(int fd, short event, void *d)
963 {
964 	struct bufferevent	*bufev = d;
965 	struct client		*client = bufev->cbarg;
966 	ssize_t			 ret;
967 	size_t			 len;
968 	short			 what = EVBUFFER_WRITE;
969 
970 	if (event == EV_TIMEOUT) {
971 		what |= EVBUFFER_TIMEOUT;
972 		goto err;
973 	}
974 
975 	if (EVBUFFER_LENGTH(bufev->output) != 0) {
976 		ret = tls_write(client->ctx,
977 		    EVBUFFER_DATA(bufev->output),
978 		    EVBUFFER_LENGTH(bufev->output));
979 		switch (ret) {
980 		case TLS_WANT_POLLIN:
981 		case TLS_WANT_POLLOUT:
982 			goto retry;
983 		case -1:
984 			what |= EVBUFFER_ERROR;
985 			goto err;
986 		}
987 		len = ret;
988 		evbuffer_drain(bufev->output, len);
989 	}
990 
991 	if (EVBUFFER_LENGTH(bufev->output) != 0)
992 		event_add(&bufev->ev_write, NULL);
993 
994 	if (bufev->writecb != NULL &&
995 	    EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
996 		(*bufev->writecb)(bufev, bufev->cbarg);
997 	return;
998 
999 retry:
1000 	event_add(&bufev->ev_write, NULL);
1001 	return;
1002 err:
1003 	log_warnx("tls error: %s", tls_error(client->ctx));
1004 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
1005 }
1006 
1007 static void
1008 client_read(struct bufferevent *bev, void *d)
1009 {
1010 	struct client	*c = d;
1011 	struct evbuffer	*src = EVBUFFER_INPUT(bev);
1012 	const char	*parse_err = "invalid request";
1013 	char		 decoded[DOMAIN_NAME_LEN];
1014 	size_t		 len;
1015 
1016 	bufferevent_disable(bev, EVBUFFER_READ);
1017 
1018 	/*
1019 	 * libevent2 can still somehow call this function, even
1020 	 * though I never enable EV_READ in the bufferevent.  If
1021 	 * that's the case, bail out.
1022 	 */
1023 	if (c->type != REQUEST_UNDECIDED)
1024 		return;
1025 
1026 	/* max url len + \r\n */
1027 	if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1028 		log_debug("too much data received");
1029 		start_reply(c, BAD_REQUEST, "bad request");
1030 		return;
1031 	}
1032 
1033 	c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1034 	if (c->req == NULL) {
1035 		/* not enough data yet. */
1036 		bufferevent_enable(bev, EVBUFFER_READ);
1037 		return;
1038 	}
1039 	c->reqlen = strlen(c->req);
1040 	if (c->reqlen > 1024+2) {
1041 		log_debug("URL too long");
1042 		start_reply(c, BAD_REQUEST, "bad request");
1043 		return;
1044 	}
1045 
1046 	if (!parse_iri(c->req, &c->iri, &parse_err) ||
1047 	    !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1048 		log_debug("IRI parse error: %s", parse_err);
1049 		start_reply(c, BAD_REQUEST, "bad request");
1050 		return;
1051 	}
1052 
1053 	if (apply_reverse_proxy(c))
1054 		return;
1055 
1056 	/* ignore the port number */
1057 	if (strcmp(c->iri.schema, "gemini") ||
1058 	    strcmp(decoded, c->domain)) {
1059 		start_reply(c, PROXY_REFUSED, "won't proxy request");
1060 		return;
1061 	}
1062 
1063 	if (apply_require_ca(c) ||
1064 	    apply_block_return(c)||
1065 	    apply_fastcgi(c))
1066 		return;
1067 
1068 	open_file(c);
1069 }
1070 
1071 void
1072 client_write(struct bufferevent *bev, void *d)
1073 {
1074 	struct client	*c = d;
1075 	struct evbuffer	*out = EVBUFFER_OUTPUT(bev);
1076 	char		 nam[PATH_MAX];
1077 	char		 buf[BUFSIZ];
1078 	ssize_t		 r;
1079 
1080 	switch (c->type) {
1081 	case REQUEST_UNDECIDED:
1082 		/*
1083 		 * Ignore spurious calls when we still don't have idea
1084 		 * what to do with the request.
1085 		 */
1086 		break;
1087 
1088 	case REQUEST_FILE:
1089 		if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1090 			log_warn("read");
1091 			client_error(bev, EVBUFFER_ERROR, c);
1092 			return;
1093 		} else if (r == 0) {
1094 			client_close(c);
1095 			return;
1096 		} else if (r != sizeof(buf))
1097 			c->type = REQUEST_DONE;
1098 		bufferevent_write(bev, buf, r);
1099 		break;
1100 
1101 	case REQUEST_DIR:
1102 		/* TODO: handle big big directories better */
1103 		for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1104 			const char *sufx = "";
1105 
1106 			encode_path(nam, sizeof(nam),
1107 			    c->dir[c->diroff]->d_name);
1108 			if (c->dir[c->diroff]->d_type == DT_DIR)
1109 				sufx = "/";
1110 			evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1111 			free(c->dir[c->diroff]);
1112 		}
1113 		free(c->dir);
1114 		c->dir = NULL;
1115 
1116 		c->type = REQUEST_DONE;
1117 
1118 		event_add(&c->bev->ev_write, NULL);
1119 		break;
1120 
1121 	case REQUEST_FCGI:
1122 	case REQUEST_PROXY:
1123 		/*
1124 		 * Here we depend on fastcgi or proxy connection to
1125 		 * provide data.
1126 		 */
1127 		break;
1128 
1129 	case REQUEST_DONE:
1130 		if (EVBUFFER_LENGTH(out) == 0)
1131 			client_close(c);
1132 		break;
1133 	}
1134 }
1135 
1136 static void
1137 client_error(struct bufferevent *bev, short error, void *d)
1138 {
1139 	struct client	*c = d;
1140 
1141 	c->type = REQUEST_DONE;
1142 
1143 	if (error & EVBUFFER_TIMEOUT) {
1144 		log_debug("timeout; forcefully closing the connection");
1145 		if (c->code == 0)
1146 			start_reply(c, BAD_REQUEST, "timeout");
1147 		else
1148 			client_close(c);
1149 		return;
1150 	}
1151 
1152 	if (error & EVBUFFER_EOF) {
1153 		client_close(c);
1154 		return;
1155 	}
1156 
1157 	log_warnx("unknown bufferevent error 0x%x", error);
1158 	client_close(c);
1159 }
1160 
1161 void
1162 start_reply(struct client *c, int code, const char *meta)
1163 {
1164 	struct evbuffer	*evb = EVBUFFER_OUTPUT(c->bev);
1165 	const char	*lang;
1166 	int		 r, rr;
1167 
1168 	bufferevent_enable(c->bev, EVBUFFER_WRITE);
1169 
1170 	c->code = code;
1171 	c->meta = meta;
1172 
1173 	r = evbuffer_add_printf(evb, "%d %s", code, meta);
1174 	if (r == -1)
1175 		goto err;
1176 
1177 	/* 2 digit status + space + 1024 max reply */
1178 	if (r > 1027)
1179 		goto overflow;
1180 
1181 	if (c->type != REQUEST_FCGI &&
1182 	    c->type != REQUEST_PROXY &&
1183 	    !strcmp(meta, "text/gemini") &&
1184 	    (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1185 		rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1186 		if (rr == -1)
1187 			goto err;
1188 		if (r + rr > 1027)
1189 			goto overflow;
1190 	}
1191 
1192 	bufferevent_write(c->bev, "\r\n", 2);
1193 
1194 	if (!vhost_disable_log(c->host, c->iri.path))
1195 		log_request(c, (char *)EVBUFFER_DATA(evb),
1196 		    EVBUFFER_LENGTH(evb));
1197 
1198 	if (code != 20)
1199 		c->type = REQUEST_DONE;
1200 
1201 	return;
1202 
1203 err:
1204 	log_warnx("evbuffer_add_printf error: no memory");
1205 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1206 	client_close(c);
1207 	return;
1208 
1209 overflow:
1210 	log_warnx("reply header overflow");
1211 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1212 	start_reply(c, TEMP_FAILURE, "internal error");
1213 }
1214 
1215 static void
1216 client_close_ev(int fd, short event, void *d)
1217 {
1218 	struct client	*c = d;
1219 
1220 	switch (tls_close(c->ctx)) {
1221 	case TLS_WANT_POLLIN:
1222 		event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1223 		break;
1224 	case TLS_WANT_POLLOUT:
1225 		event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1226 		break;
1227 	}
1228 
1229 	connected_clients--;
1230 
1231 	free(c->req);
1232 
1233 	tls_free(c->ctx);
1234 	c->ctx = NULL;
1235 
1236 	free(c->header);
1237 
1238 	if (c->pfd != -1)
1239 		close(c->pfd);
1240 
1241 	if (c->dir != NULL)
1242 		free(c->dir);
1243 
1244 	close(c->fd);
1245 	c->fd = -1;
1246 }
1247 
1248 static void
1249 client_proxy_close(int fd, short event, void *d)
1250 {
1251 	struct tls *ctx = d;
1252 
1253 	if (ctx == NULL) {
1254 		close(fd);
1255 		return;
1256 	}
1257 
1258 	switch (tls_close(ctx)) {
1259 	case TLS_WANT_POLLIN:
1260 		event_once(fd, EV_READ, client_proxy_close, d, NULL);
1261 		break;
1262 	case TLS_WANT_POLLOUT:
1263 		event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1264 		break;
1265 	}
1266 
1267 	tls_free(ctx);
1268 	close(fd);
1269 }
1270 
1271 void
1272 client_close(struct client *c)
1273 {
1274 	/*
1275 	 * We may end up calling client_close in various situations
1276 	 * and for the most unexpected reasons.  Therefore, we need to
1277 	 * ensure that everything gets properly released once we reach
1278 	 * this point.
1279 	 */
1280 
1281 	SPLAY_REMOVE(client_tree_id, &clients, c);
1282 
1283 	if (c->cgibev != NULL) {
1284 		bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1285 		bufferevent_free(c->cgibev);
1286 		c->cgibev = NULL;
1287 		close(c->pfd);
1288 		c->pfd = -1;
1289 	}
1290 
1291 	bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1292 	bufferevent_free(c->bev);
1293 	c->bev = NULL;
1294 
1295 	if (c->proxyevset &&
1296 	    event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1297 		c->proxyevset = 0;
1298 		event_del(&c->proxyev);
1299 	}
1300 
1301 	if (c->pfd != -1 && c->proxyctx != NULL) {
1302 		/* shut down the proxy TLS connection */
1303 		client_proxy_close(c->pfd, 0, c->proxyctx);
1304 		c->pfd = -1;
1305 	}
1306 
1307 	if (c->proxybev != NULL)
1308 		bufferevent_free(c->proxybev);
1309 
1310 	client_close_ev(c->fd, 0, c);
1311 }
1312 
1313 void
1314 do_accept(int sock, short et, void *d)
1315 {
1316 	struct conf *conf = d;
1317 	struct client *c;
1318 	struct sockaddr_storage addr;
1319 	struct sockaddr *saddr;
1320 	socklen_t len;
1321 	int fd;
1322 
1323 	saddr = (struct sockaddr*)&addr;
1324 	len = sizeof(addr);
1325 	if ((fd = accept(sock, saddr, &len)) == -1) {
1326 		if (errno == EWOULDBLOCK || errno == EAGAIN ||
1327 		    errno == ECONNABORTED)
1328 			return;
1329 		fatal("accept");
1330 	}
1331 
1332 	mark_nonblock(fd);
1333 
1334 	c = xcalloc(1, sizeof(*c));
1335 	c->conf = conf;
1336 	c->id = ++server_client_id;
1337 	c->fd = fd;
1338 	c->pfd = -1;
1339 	c->addr = addr;
1340 
1341 	if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1342 		log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1343 		close(c->fd);
1344 		free(c);
1345 		return;
1346 	}
1347 
1348 	SPLAY_INSERT(client_tree_id, &clients, c);
1349 	event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1350 	connected_clients++;
1351 }
1352 
1353 struct client *
1354 client_by_id(int id)
1355 {
1356 	struct client find;
1357 
1358 	find.id = id;
1359 	return SPLAY_FIND(client_tree_id, &clients, &find);
1360 }
1361 
1362 static void
1363 handle_siginfo(int fd, short ev, void *d)
1364 {
1365 	log_info("%d connected clients", connected_clients);
1366 }
1367 
1368 static void
1369 add_keypair(struct vhost *h, struct tls_config *conf)
1370 {
1371 	if (h->ocsp == NULL) {
1372 		if (tls_config_add_keypair_mem(conf, h->cert, h->certlen,
1373 		    h->key, h->keylen) == -1)
1374 			fatalx("failed to load the keypair: %s",
1375 			    tls_config_error(conf));
1376 	} else {
1377 		if (tls_config_add_keypair_ocsp_mem(conf, h->cert, h->certlen,
1378 		    h->key, h->keylen, h->ocsp, h->ocsplen) == -1)
1379 			fatalx("failed to load the keypair: %s",
1380 			    tls_config_error(conf));
1381 	}
1382 }
1383 
1384 static void
1385 setup_tls(struct conf *conf)
1386 {
1387 	struct tls_config	*tlsconf;
1388 	struct vhost		*h;
1389 
1390 	if (ctx == NULL) {
1391 		if ((ctx = tls_server()) == NULL)
1392 			fatal("tls_server failure");
1393 	}
1394 
1395 	if ((tlsconf = tls_config_new()) == NULL)
1396 		fatal("tls_config_new");
1397 
1398 	if (conf->use_privsep_crypto)
1399 		tls_config_use_fake_private_key(tlsconf);
1400 
1401 	/* optionally accept client certs, but don't try to verify them */
1402 	tls_config_verify_client_optional(tlsconf);
1403 	tls_config_insecure_noverifycert(tlsconf);
1404 
1405 	if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1406 		fatalx("tls_config_set_protocols: %s",
1407 		    tls_config_error(tlsconf));
1408 
1409 	h = TAILQ_FIRST(&conf->hosts);
1410 
1411 	/* we need to set something, then we can add how many key we want */
1412 	if (tls_config_set_keypair_mem(tlsconf, h->cert, h->certlen,
1413 	    h->key, h->keylen) == -1)
1414 		fatalx("tls_config_set_keypair_mem failed: %s",
1415 		    tls_config_error(tlsconf));
1416 
1417 	/* same for OCSP */
1418 	if (h->ocsp != NULL &&
1419 	    tls_config_set_ocsp_staple_mem(tlsconf, h->ocsp, h->ocsplen)
1420 	    == -1)
1421 		fatalx("tls_config_set_ocsp_staple_file failed: %s",
1422 		    tls_config_error(tlsconf));
1423 
1424 	while ((h = TAILQ_NEXT(h, vhosts)) != NULL)
1425 		add_keypair(h, tlsconf);
1426 
1427 	tls_reset(ctx);
1428 	if (tls_configure(ctx, tlsconf) == -1)
1429 		fatalx("tls_configure: %s", tls_error(ctx));
1430 
1431 	tls_config_free(tlsconf);
1432 }
1433 
1434 static void
1435 load_vhosts(struct conf *conf)
1436 {
1437 	struct vhost	*h;
1438 	struct location	*l;
1439 
1440 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1441 		TAILQ_FOREACH(l, &h->locations, locations) {
1442 			if (*l->dir == '\0')
1443 				continue;
1444 			l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1445 			if (l->dirfd == -1)
1446 				fatal("open %s for domain %s", l->dir,
1447 				    h->domain);
1448 		}
1449 	}
1450 }
1451 
1452 void
1453 server(struct privsep *ps, struct privsep_proc *p)
1454 {
1455 	proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1456 }
1457 
1458 void
1459 server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1460 {
1461 	struct conf *c;
1462 
1463 	SPLAY_INIT(&clients);
1464 
1465 #ifdef SIGINFO
1466 	signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1467 	signal_add(&siginfo, NULL);
1468 #endif
1469 	signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1470 	signal_add(&sigusr2, NULL);
1471 
1472 	sandbox_server_process();
1473 
1474 	/*
1475 	 * ge doesn't use the privsep crypto engine; it doesn't use
1476 	 * privsep at all so `ps' is NULL.
1477 	 */
1478 	if (ps != NULL) {
1479 		c = ps->ps_env;
1480 		if (c->use_privsep_crypto)
1481 			crypto_engine_init(ps->ps_env);
1482 	}
1483 }
1484 
1485 int
1486 server_configure_done(struct conf *conf)
1487 {
1488 	if (load_default_mime(&conf->mime) == -1)
1489 		fatal("can't load default mime");
1490 	sort_mime(&conf->mime);
1491 	setup_tls(conf);
1492 	load_vhosts(conf);
1493 	if (conf->sock4 != -1)
1494 		event_add(&conf->evsock4, NULL);
1495 	if (conf->sock6 != -1)
1496 		event_add(&conf->evsock6, NULL);
1497 
1498 	return 0;
1499 }
1500 
1501 static int
1502 server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1503 {
1504 	struct privsep	*ps = p->p_ps;
1505 	struct conf	*conf = ps->ps_env;
1506 
1507 	switch (imsg->hdr.type) {
1508 	case IMSG_RECONF_START:
1509 	case IMSG_RECONF_MIME:
1510 	case IMSG_RECONF_PROTOS:
1511 	case IMSG_RECONF_PORT:
1512 	case IMSG_RECONF_SOCK4:
1513 	case IMSG_RECONF_SOCK6:
1514 	case IMSG_RECONF_FCGI:
1515 	case IMSG_RECONF_HOST:
1516 	case IMSG_RECONF_CERT:
1517 	case IMSG_RECONF_KEY:
1518 	case IMSG_RECONF_OCSP:
1519 	case IMSG_RECONF_LOC:
1520 	case IMSG_RECONF_ENV:
1521 	case IMSG_RECONF_ALIAS:
1522 	case IMSG_RECONF_PROXY:
1523 	case IMSG_RECONF_PROXY_CERT:
1524 	case IMSG_RECONF_PROXY_KEY:
1525 		return config_recv(conf, imsg);
1526 	case IMSG_RECONF_END:
1527 		if (config_recv(conf, imsg) == -1)
1528 			return -1;
1529 		if (server_configure_done(conf) == -1)
1530 			return -1;
1531 		break;
1532 	default:
1533 		return -1;
1534 	}
1535 
1536 	return 0;
1537 }
1538 
1539 static int
1540 server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1541 {
1542 	return -1;
1543 }
1544 
1545 static int
1546 server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1547 {
1548 	return -1;
1549 }
1550 
1551 int
1552 client_tree_cmp(struct client *a, struct client *b)
1553 {
1554 	if (a->id == b->id)
1555 		return 0;
1556 	else if (a->id < b->id)
1557 		return -1;
1558 	else
1559 		return +1;
1560 }
1561 
1562 SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)