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Date:: Tue Mar 12 14:10:36 2024 UTC
Message:: remove dead code
Actions:: History | Blame | Raw File
1 /*
2  * Copyright (c) 2021, 2022, 2023 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 #ifdef SIGINFO
41 static struct event siginfo;
42 #endif
43 static struct event sigusr2;
44 
45 int connected_clients;
46 
47 /*
48  * This function is not publicy exported because it is a hack until libtls
49  * has a proper privsep setup.
50  */
51 void tls_config_use_fake_private_key(struct tls_config *);
52 
53 static inline int matches(const char*, const char*);
54 
55 static void	 handle_handshake(int, short, void*);
56 static void	 fmtbuf(char *, size_t, const char *, struct client *,
57 		    const char *);
58 static int	 apply_block_return(struct client*);
59 static int	 check_matching_certificate(X509_STORE *, struct client *);
60 static int	 apply_reverse_proxy(struct client *);
61 static int	 apply_fastcgi(struct client*);
62 static int	 apply_require_ca(struct client*);
63 static void	 open_dir(struct client*);
64 static void	 redirect_canonical_dir(struct client*);
65 
66 static void	 client_tls_readcb(int, short, void *);
67 static void	 client_tls_writecb(int, short, void *);
68 
69 static void	 client_read(struct bufferevent *, void *);
70 void		 client_write(struct bufferevent *, void *);
71 static void	 client_error(struct bufferevent *, short, void *);
72 
73 static void	 client_close_ev(int, short, void *);
74 
75 static void	 handle_siginfo(int, short, void*);
76 
77 static int	 server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
78 static int	 server_dispatch_crypto(int, struct privsep_proc *, struct imsg *);
79 static int	 server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
80 
81 static struct privsep_proc procs[] = {
82 	{ "parent",	PROC_PARENT,	server_dispatch_parent },
83 	{ "crypto",	PROC_CRYPTO,	server_dispatch_crypto },
84 	{ "logger",	PROC_LOGGER,	server_dispatch_logger },
85 };
86 
87 static uint32_t server_client_id;
88 
89 struct client_tree_id clients;
90 
91 static inline int
92 match_addr(struct address *target, struct address *source)
93 {
94 	return (target->ai_flags == source->ai_flags &&
95 	    target->ai_family == source->ai_family &&
96 	    target->ai_socktype == source->ai_socktype &&
97 	    target->ai_protocol == source->ai_protocol &&
98 	    target->slen == source->slen &&
99 	    !memcmp(&target->ss, &source->ss, target->slen));
100 }
101 
102 static inline int
103 matches(const char *pattern, const char *path)
104 {
105 	if (*path == '/')
106 		path++;
107 	return !fnmatch(pattern, path, 0);
108 }
109 
110 static inline int
111 match_host(struct vhost *v, struct client *c)
112 {
113 	struct alist *a;
114 	struct address *addr;
115 
116 	TAILQ_FOREACH(addr, &v->addrs, addrs)
117 		if (match_addr(addr, c->addr))
118 			break;
119 	if (addr == NULL)
120 		return 0;
121 
122 	if (matches(v->domain, c->domain))
123 		return 1;
124 
125 	TAILQ_FOREACH(a, &v->aliases, aliases)
126 		if (matches(a->alias, c->domain))
127 			return 1;
128 
129 	return 0;
130 }
131 
132 const char *
133 vhost_lang(struct vhost *v, const char *path)
134 {
135 	struct location *loc;
136 
137 	if (v == NULL || path == NULL)
138 		return NULL;
139 
140 	loc = TAILQ_FIRST(&v->locations);
141 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
142 		if (*loc->lang != '\0') {
143 			if (matches(loc->match, path))
144 				return loc->lang;
145 		}
146 	}
147 
148 	loc = TAILQ_FIRST(&v->locations);
149 	if (*loc->lang == '\0')
150 		return NULL;
151 	return loc->lang;
152 }
153 
154 const char *
155 vhost_default_mime(struct vhost *v, const char *path)
156 {
157 	struct location *loc;
158 	const char *default_mime = "application/octet-stream";
159 
160 	if (v == NULL || path == NULL)
161 		return default_mime;
162 
163 	loc = TAILQ_FIRST(&v->locations);
164 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
165 		if (*loc->default_mime != '\0') {
166 			if (matches(loc->match, path))
167 				return loc->default_mime;
168 		}
169 	}
170 
171 	loc = TAILQ_FIRST(&v->locations);
172 	if (*loc->default_mime != '\0')
173 		return loc->default_mime;
174 	return default_mime;
175 }
176 
177 const char *
178 vhost_index(struct vhost *v, const char *path)
179 {
180 	struct location *loc;
181 	const char *index = "index.gmi";
182 
183 	if (v == NULL || path == NULL)
184 		return index;
185 
186 	loc = TAILQ_FIRST(&v->locations);
187 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
188 		if (*loc->index != '\0') {
189 			if (matches(loc->match, path))
190 				return loc->index;
191 		}
192 	}
193 
194 	loc = TAILQ_FIRST(&v->locations);
195 	if (*loc->index != '\0')
196 		return loc->index;
197 	return index;
198 }
199 
200 int
201 vhost_auto_index(struct vhost *v, const char *path)
202 {
203 	struct location *loc;
204 
205 	if (v == NULL || path == NULL)
206 		return 0;
207 
208 	loc = TAILQ_FIRST(&v->locations);
209 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
210 		if (loc->auto_index != 0) {
211 			if (matches(loc->match, path))
212 				return loc->auto_index == 1;
213 		}
214 	}
215 
216 	loc = TAILQ_FIRST(&v->locations);
217 	return loc->auto_index == 1;
218 }
219 
220 int
221 vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
222 {
223 	struct location *loc;
224 
225 	if (v == NULL || path == NULL)
226 		return 0;
227 
228 	loc = TAILQ_FIRST(&v->locations);
229 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
230 		if (loc->block_code != 0) {
231 			if (matches(loc->match, path)) {
232 				*code = loc->block_code;
233 				*fmt = loc->block_fmt;
234 				return 1;
235 			}
236 		}
237 	}
238 
239 	loc = TAILQ_FIRST(&v->locations);
240 	*code = loc->block_code;
241 	*fmt = loc->block_fmt;
242 	return loc->block_code != 0;
243 }
244 
245 struct location *
246 vhost_fastcgi(struct vhost *v, const char *path)
247 {
248 	struct location *loc;
249 	int force_disable = 0;
250 
251 	if (v == NULL || path == NULL)
252 		return NULL;
253 
254 	loc = TAILQ_FIRST(&v->locations);
255 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
256 		if (loc->fcgi != -1)
257 			if (matches(loc->match, path))
258 				return loc;
259 		if (loc->nofcgi && matches(loc->match, path))
260 			force_disable = 1;
261 	}
262 
263 	if (force_disable)
264 		return NULL;
265 
266 	loc = TAILQ_FIRST(&v->locations);
267 	return loc->fcgi == -1 ? NULL : loc;
268 }
269 
270 int
271 vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
272 {
273 	struct location *loc;
274 	size_t		 l = 0;
275 
276 	if (v == NULL || path == NULL)
277 		return -1;
278 
279 	loc = TAILQ_FIRST(&v->locations);
280 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
281 		l++;
282 		if (loc->dirfd != -1)
283 			if (matches(loc->match, path)) {
284 				*retloc = l;
285 				return loc->dirfd;
286 			}
287 	}
288 
289 	*retloc = 0;
290 	loc = TAILQ_FIRST(&v->locations);
291 	return loc->dirfd;
292 }
293 
294 int
295 vhost_strip(struct vhost *v, const char *path)
296 {
297 	struct location *loc;
298 
299 	if (v == NULL || path == NULL)
300 		return 0;
301 
302 	loc = TAILQ_FIRST(&v->locations);
303 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
304 		if (loc->strip != 0) {
305 			if (matches(loc->match, path))
306 				return loc->strip;
307 		}
308 	}
309 
310 	loc = TAILQ_FIRST(&v->locations);
311 	return loc->strip;
312 }
313 
314 X509_STORE *
315 vhost_require_ca(struct vhost *v, const char *path)
316 {
317 	struct location *loc;
318 
319 	if (v == NULL || path == NULL)
320 		return NULL;
321 
322 	loc = TAILQ_FIRST(&v->locations);
323 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
324 		if (loc->reqca != NULL) {
325 			if (matches(loc->match, path))
326 				return loc->reqca;
327 		}
328 	}
329 
330 	loc = TAILQ_FIRST(&v->locations);
331 	return loc->reqca;
332 }
333 
334 int
335 vhost_disable_log(struct vhost *v, const char *path)
336 {
337 	struct location *loc;
338 
339 	if (v == NULL || path == NULL)
340 		return 0;
341 
342 	loc = TAILQ_FIRST(&v->locations);
343 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
344 		if (loc->disable_log && matches(loc->match, path))
345 				return 1;
346 	}
347 
348 	loc = TAILQ_FIRST(&v->locations);
349 	return loc->disable_log;
350 }
351 
352 void
353 mark_nonblock(int fd)
354 {
355 	int flags;
356 
357 	if ((flags = fcntl(fd, F_GETFL)) == -1)
358 		fatal("fcntl(F_GETFL)");
359 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
360 		fatal("fcntl(F_SETFL)");
361 }
362 
363 static void
364 handle_handshake(int fd, short ev, void *d)
365 {
366 	struct client *c = d;
367 	struct conf *conf = c->conf;
368 	struct vhost *h;
369 	const char *servname;
370 	const char *parse_err = "unknown error";
371 
372 	switch (tls_handshake(c->ctx)) {
373 	case 0:  /* success */
374 		break;
375 	case -1:
376 		log_warnx("(%s:%s) tls_handshake failed: %s",
377 		    c->rhost, c->rserv, tls_error(c->ctx));
378 		client_close(c);
379 		return;
380 	case TLS_WANT_POLLIN:
381 		event_once(c->fd, EV_READ, handle_handshake, c, NULL);
382 		return;
383 	case TLS_WANT_POLLOUT:
384 		event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
385 		return;
386 	default:
387 		/* unreachable */
388 		abort();
389 	}
390 
391 	c->bev = bufferevent_new(fd, client_read, client_write,
392 	    client_error, c);
393 	if (c->bev == NULL)
394 		fatal("%s: failed to allocate client buffer", __func__);
395 
396 	event_set(&c->bev->ev_read, c->fd, EV_READ,
397 	    client_tls_readcb, c->bev);
398 	event_set(&c->bev->ev_write, c->fd, EV_WRITE,
399 	    client_tls_writecb, c->bev);
400 
401 #if HAVE_LIBEVENT2
402 	evbuffer_unfreeze(c->bev->input, 0);
403 	evbuffer_unfreeze(c->bev->output, 1);
404 #endif
405 
406 	if ((servname = tls_conn_servername(c->ctx)) == NULL) {
407 		log_debug("handshake: missing SNI");
408 		goto err;
409 	}
410 
411 	if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
412 		log_info("puny_decode: %s", parse_err);
413 		goto err;
414 	}
415 
416 	TAILQ_FOREACH(h, &conf->hosts, vhosts)
417 		if (match_host(h, c))
418 			break;
419 
420 	log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
421 	    servname != NULL ? servname : "(null)",
422 	    c->domain,
423 	    h != NULL ? h->domain : "(null)");
424 
425 	if (h != NULL) {
426 		c->host = h;
427 		bufferevent_enable(c->bev, EV_READ);
428 		return;
429 	}
430 
431 err:
432 	start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
433 }
434 
435 static void
436 fmtbuf(char *buf, size_t buflen, const char *fmt, struct client *c,
437     const char *path)
438 {
439 	size_t i;
440 	char tmp[32];
441 
442 	*buf = '\0';
443 	memset(tmp, 0, sizeof(tmp));
444 	for (i = 0; *fmt; ++fmt) {
445 		if (i == sizeof(tmp)-1 || *fmt == '%') {
446 			strlcat(buf, tmp, buflen);
447 			memset(tmp, 0, sizeof(tmp));
448 			i = 0;
449 		}
450 
451 		if (*fmt != '%') {
452 			tmp[i++] = *fmt;
453 			continue;
454 		}
455 
456 		switch (*++fmt) {
457 		case '%':
458 			strlcat(buf, "%", buflen);
459 			break;
460 		case 'p':
461 			if (*path != '/')
462 				strlcat(buf, "/", buflen);
463 			strlcat(buf, path, buflen);
464 			break;
465 		case 'q':
466 			strlcat(buf, c->iri.query, buflen);
467 			break;
468 		case 'P':
469 			snprintf(tmp, sizeof(tmp), "%d", c->addr->port);
470 			strlcat(buf, tmp, buflen);
471 			memset(tmp, 0, sizeof(tmp));
472 			break;
473 		case 'N':
474 			strlcat(buf, c->domain, buflen);
475 			break;
476 		default:
477 			log_warnx("%s: unknown fmt specifier %c",
478 			    __func__, *fmt);
479 		}
480 	}
481 
482 	if (i != 0)
483 		strlcat(buf, tmp, buflen);
484 }
485 
486 /* 1 if a matching `block return' (and apply it), 0 otherwise */
487 static int
488 apply_block_return(struct client *c)
489 {
490 	char buf[GEMINI_URL_LEN];
491 	const char *fmt, *path;
492 	int code;
493 
494 	if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
495 		return 0;
496 
497 	path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
498 	fmtbuf(buf, sizeof(buf), fmt, c, path);
499 
500 	start_reply(c, code, buf);
501 	return 1;
502 }
503 
504 static struct proxy *
505 matched_proxy(struct client *c)
506 {
507 	struct proxy	*p;
508 	const char	*proto;
509 	const char	*host;
510 	const char	*port;
511 
512 	TAILQ_FOREACH(p, &c->host->proxies, proxies) {
513 		if (*(proto = p->match_proto) == '\0')
514 			proto = "gemini";
515 		if (*(host = p->match_host) == '\0')
516 			host = "*";
517 		if (*(port = p->match_port) == '\0')
518 			port = "*";
519 
520 		if (matches(proto, c->iri.schema) &&
521 		    matches(host, c->domain) &&
522 		    matches(port, c->iri.port))
523 			return p;
524 	}
525 
526 	return NULL;
527 }
528 
529 static int
530 check_matching_certificate(X509_STORE *store, struct client *c)
531 {
532 	const uint8_t	*cert;
533 	size_t		 len;
534 
535 	if (!tls_peer_cert_provided(c->ctx)) {
536 		start_reply(c, CLIENT_CERT_REQ, "client certificate required");
537 		return 1;
538 	}
539 
540 	cert = tls_peer_cert_chain_pem(c->ctx, &len);
541 	if (!validate_against_ca(store, cert, len)) {
542 		start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
543 		return 1;
544 	}
545 
546 	return 0;
547 }
548 
549 static int
550 proxy_socket(struct client *c, const char *host, const char *port)
551 {
552 	struct addrinfo hints, *res, *res0;
553 	int r, sock, save_errno;
554 	const char *cause = NULL;
555 
556 	memset(&hints, 0, sizeof(hints));
557 	hints.ai_family = AF_UNSPEC;
558 	hints.ai_socktype = SOCK_STREAM;
559 
560 	/* XXX: asr_run? :> */
561 	r = getaddrinfo(host, port, &hints, &res0);
562 	if (r != 0) {
563 		log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
564 		    host, port, gai_strerror(r));
565 		return -1;
566 	}
567 
568 	for (res = res0; res; res = res->ai_next) {
569 		sock = socket(res->ai_family, res->ai_socktype,
570 		    res->ai_protocol);
571 		if (sock == -1) {
572 			cause = "socket";
573 			continue;
574 		}
575 
576 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
577 			cause = "connect";
578 			save_errno = errno;
579 			close(sock);
580 			errno = save_errno;
581 			sock = -1;
582 			continue;
583 		}
584 
585 		break;
586 	}
587 
588 	if (sock == -1)
589 		log_warn("can't connect to %s:%s: %s", host, port, cause);
590 
591 	freeaddrinfo(res0);
592 
593 	return sock;
594 }
595 
596 /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
597 static int
598 apply_reverse_proxy(struct client *c)
599 {
600 	struct proxy	*p;
601 
602 	if ((p = matched_proxy(c)) == NULL)
603 		return 0;
604 
605 	c->proxy = p;
606 
607 	if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
608 		return 1;
609 
610 	log_debug("opening proxy connection for %s:%s",
611 	    p->host, p->port);
612 
613 	if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
614 		start_reply(c, PROXY_ERROR, "proxy error");
615 		return 1;
616 	}
617 
618 	mark_nonblock(c->pfd);
619 	if (proxy_init(c) == -1)
620 		start_reply(c, PROXY_ERROR, "proxy error");
621 
622 	return 1;
623 }
624 
625 static int
626 fcgi_open_sock(struct fcgi *f)
627 {
628 	struct sockaddr_un	addr;
629 	int			fd;
630 
631 	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
632 		log_warn("socket");
633 		return -1;
634 	}
635 
636 	memset(&addr, 0, sizeof(addr));
637 	addr.sun_family = AF_UNIX;
638 	strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
639 
640 	if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
641 		log_warn("failed to connect to %s", f->path);
642 		close(fd);
643 		return -1;
644 	}
645 
646 	return fd;
647 }
648 
649 static int
650 fcgi_open_conn(struct fcgi *f)
651 {
652 	struct addrinfo	 hints, *servinfo, *p;
653 	int		 r, sock, save_errno;
654 	const char	*cause = NULL;
655 
656 	memset(&hints, 0, sizeof(hints));
657 	hints.ai_family = AF_UNSPEC;
658 	hints.ai_socktype = SOCK_STREAM;
659 	hints.ai_flags = AI_ADDRCONFIG;
660 
661 	if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
662 		log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
663 		    gai_strerror(r));
664 		return -1;
665 	}
666 
667 	for (p = servinfo; p != NULL; p = p->ai_next) {
668 		sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
669 		if (sock == -1) {
670 			cause = "socket";
671 			continue;
672 		}
673 		if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
674 			cause = "connect";
675 			save_errno = errno;
676 			close(sock);
677 			errno = save_errno;
678 			continue;
679 		}
680 		break;
681 	}
682 
683 	if (p == NULL) {
684 		log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
685 		    cause);
686 		sock = -1;
687 	}
688 
689 	freeaddrinfo(servinfo);
690 	return sock;
691 }
692 
693 /* 1 if matching `fcgi' (and apply it), 0 otherwise */
694 static int
695 apply_fastcgi(struct client *c)
696 {
697 	int		 i = 0;
698 	struct fcgi	*f;
699 	struct location	*loc;
700 
701 	if ((loc = vhost_fastcgi(c->host, c->iri.path)) == NULL)
702 		return 0;
703 
704 	TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
705 		if (i == loc->fcgi)
706 			break;
707 		++i;
708 	}
709 
710 	if (f == NULL) {
711 		log_warnx("can't find fcgi #%d", loc->fcgi);
712 		return 0;
713 	}
714 
715 	log_debug("opening fastcgi connection for (%s,%s)",
716 	    f->path, f->port);
717 
718 	if (*f->port == '\0')
719 		c->pfd = fcgi_open_sock(f);
720 	else
721 		c->pfd = fcgi_open_conn(f);
722 
723 	if (c->pfd == -1) {
724 		start_reply(c, CGI_ERROR, "CGI error");
725 		return 1;
726 	}
727 
728 	mark_nonblock(c->pfd);
729 
730 	c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
731 	    fcgi_error, c);
732 	if (c->cgibev == NULL) {
733 		start_reply(c, TEMP_FAILURE, "internal server error");
734 		return 1;
735 	}
736 
737 	bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
738 	fcgi_req(c, loc);
739 
740 	return 1;
741 }
742 
743 /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
744 static int
745 apply_require_ca(struct client *c)
746 {
747 	X509_STORE	*store;
748 
749 	if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
750 		return 0;
751 	return check_matching_certificate(store, c);
752 }
753 
754 static void
755 server_dir_listing(struct client *c)
756 {
757 	int root;
758 
759 	root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
760 
761 	if (!vhost_auto_index(c->host, c->iri.path)) {
762 		start_reply(c, NOT_FOUND, "not found");
763 		return;
764 	}
765 
766 	c->dirlen = scandir_fd(c->pfd, &c->dir,
767 	    root ? select_non_dotdot : select_non_dot,
768 	    alphasort);
769 	if (c->dirlen == -1) {
770 		log_warn("scandir_fd(%d) (vhost:%s) %s",
771 		    c->pfd, c->host->domain, c->iri.path);
772 		start_reply(c, TEMP_FAILURE, "internal server error");
773 		return;
774 	}
775 
776 	c->type = REQUEST_DIR;
777 	start_reply(c, SUCCESS, "text/gemini");
778 	evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
779 	    "# Index of /%s\n\n", c->iri.path);
780 }
781 
782 static void
783 open_dir(struct client *c)
784 {
785 	struct stat sb;
786 	const char *index;
787 	char path[PATH_MAX];
788 	int fd = -1;
789 
790 	if (*c->iri.path != '\0' && !ends_with(c->iri.path, "/")) {
791 		redirect_canonical_dir(c);
792 		return;
793 	}
794 
795 	index = vhost_index(c->host, c->iri.path);
796 	fd = openat(c->pfd, index, O_RDONLY);
797 	if (fd == -1) {
798 		server_dir_listing(c);
799 		return;
800 	}
801 
802 	if (fstat(fd, &sb) == -1) {
803 		log_warn("fstat");
804 		close(fd);
805 		start_reply(c, TEMP_FAILURE, "internal server error");
806 		return;
807 	}
808 
809 	if (!S_ISREG(sb.st_mode)) {
810 		close(fd);
811 		server_dir_listing(c);
812 		return;
813 	}
814 
815 	strlcpy(path, c->iri.path, sizeof(path));
816 	strlcat(path, index, sizeof(path));
817 
818 	close(c->pfd);
819 	c->pfd = fd;
820 	c->type = REQUEST_FILE;
821 	start_reply(c, SUCCESS, mime(c->conf, c->host, path));
822 }
823 
824 static void
825 redirect_canonical_dir(struct client *c)
826 {
827 	char buf[GEMINI_URL_LEN];
828 	int r;
829 
830 	r = snprintf(buf, sizeof(buf), "/%s/", c->iri.path);
831 	if (r < 0 || (size_t)r >= sizeof(buf)) {
832 		start_reply(c, TEMP_FAILURE, "internal server error");
833 		return;
834 	}
835 
836 	start_reply(c, TEMP_REDIRECT, buf);
837 }
838 
839 static void
840 client_tls_readcb(int fd, short event, void *d)
841 {
842 	struct bufferevent	*bufev = d;
843 	struct client		*client = bufev->cbarg;
844 	ssize_t			 ret;
845 	size_t			 len;
846 	int			 what = EVBUFFER_READ;
847 	int			 howmuch = IBUF_READ_SIZE;
848 	char			 buf[IBUF_READ_SIZE];
849 
850 	if (event == EV_TIMEOUT) {
851 		what |= EVBUFFER_TIMEOUT;
852 		goto err;
853 	}
854 
855 	if (bufev->wm_read.high != 0)
856 		howmuch = MIN(sizeof(buf), bufev->wm_read.high);
857 
858 	switch (ret = tls_read(client->ctx, buf, howmuch)) {
859 	case TLS_WANT_POLLIN:
860 	case TLS_WANT_POLLOUT:
861 		goto retry;
862 	case -1:
863 		what |= EVBUFFER_ERROR;
864 		goto err;
865 	}
866 	len = ret;
867 
868 	if (len == 0) {
869 		what |= EVBUFFER_EOF;
870 		goto err;
871 	}
872 
873 	if (evbuffer_add(bufev->input, buf, len) == -1) {
874 		what |= EVBUFFER_ERROR;
875 		goto err;
876 	}
877 
878 	event_add(&bufev->ev_read, NULL);
879 	if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
880 		return;
881 	if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
882 		/*
883 		 * here we could implement a read pressure policy.
884 		 */
885 	}
886 
887 	if (bufev->readcb != NULL)
888 		(*bufev->readcb)(bufev, bufev->cbarg);
889 
890 	return;
891 
892 retry:
893 	event_add(&bufev->ev_read, NULL);
894 	return;
895 
896 err:
897 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
898 }
899 
900 static void
901 client_tls_writecb(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 	short			 what = EVBUFFER_WRITE;
908 
909 	if (event == EV_TIMEOUT) {
910 		what |= EVBUFFER_TIMEOUT;
911 		goto err;
912 	}
913 
914 	if (EVBUFFER_LENGTH(bufev->output) != 0) {
915 		ret = tls_write(client->ctx,
916 		    EVBUFFER_DATA(bufev->output),
917 		    EVBUFFER_LENGTH(bufev->output));
918 		switch (ret) {
919 		case TLS_WANT_POLLIN:
920 		case TLS_WANT_POLLOUT:
921 			goto retry;
922 		case -1:
923 			what |= EVBUFFER_ERROR;
924 			goto err;
925 		}
926 		len = ret;
927 		evbuffer_drain(bufev->output, len);
928 	}
929 
930 	if (EVBUFFER_LENGTH(bufev->output) != 0)
931 		event_add(&bufev->ev_write, NULL);
932 
933 	if (bufev->writecb != NULL &&
934 	    EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
935 		(*bufev->writecb)(bufev, bufev->cbarg);
936 	return;
937 
938 retry:
939 	event_add(&bufev->ev_write, NULL);
940 	return;
941 err:
942 	log_warnx("tls error: %s", tls_error(client->ctx));
943 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
944 }
945 
946 static void
947 client_read(struct bufferevent *bev, void *d)
948 {
949 	struct stat	 sb;
950 	struct client	*c = d;
951 	struct evbuffer	*src = EVBUFFER_INPUT(bev);
952 	const char	*path, *p, *parse_err = "invalid request";
953 	char		 decoded[DOMAIN_NAME_LEN];
954 
955 	bufferevent_disable(bev, EVBUFFER_READ);
956 
957 	/*
958 	 * libevent2 can still somehow call this function, even
959 	 * though I never enable EV_READ in the bufferevent.  If
960 	 * that's the case, bail out.
961 	 */
962 	if (c->type != REQUEST_UNDECIDED)
963 		return;
964 
965 	/* max url len + \r\n */
966 	if (EVBUFFER_LENGTH(src) > 1024 + 2) {
967 		log_debug("too much data received");
968 		start_reply(c, BAD_REQUEST, "bad request");
969 		return;
970 	}
971 
972 	c->req = evbuffer_readln(src, &c->reqlen, EVBUFFER_EOL_CRLF_STRICT);
973 	if (c->req == NULL) {
974 		/* not enough data yet. */
975 		bufferevent_enable(bev, EVBUFFER_READ);
976 		return;
977 	}
978 	if (c->reqlen > 1024+2) {
979 		log_debug("URL too long");
980 		start_reply(c, BAD_REQUEST, "bad request");
981 		return;
982 	}
983 
984 	if (!parse_iri(c->req, &c->iri, &parse_err) ||
985 	    !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
986 		log_debug("IRI parse error: %s", parse_err);
987 		start_reply(c, BAD_REQUEST, "bad request");
988 		return;
989 	}
990 
991 	if (apply_reverse_proxy(c))
992 		return;
993 
994 	/* ignore the port number */
995 	if (strcmp(c->iri.schema, "gemini") ||
996 	    strcmp(decoded, c->domain)) {
997 		start_reply(c, PROXY_REFUSED, "won't proxy request");
998 		return;
999 	}
1000 
1001 	if (apply_require_ca(c) ||
1002 	    apply_block_return(c)||
1003 	    apply_fastcgi(c))
1004 		return;
1005 
1006 	path = c->iri.path;
1007 	p = strip_path(path, vhost_strip(c->host, path));
1008 	while (*p == '/')
1009 		p++;
1010 	if (*p == '\0')
1011 		p = ".";
1012 
1013 	c->pfd = openat(vhost_dirfd(c->host, path, &c->loc), p, O_RDONLY);
1014 	if (c->pfd == -1) {
1015 		if (errno == EACCES)
1016 			log_info("can't open %s: %s", p, strerror(errno));
1017 		start_reply(c, NOT_FOUND, "not found");
1018 		return;
1019 	}
1020 
1021 	if (fstat(c->pfd, &sb) == -1) {
1022 		log_warnx("fstat %s", path);
1023 		start_reply(c, TEMP_FAILURE, "internal server error");
1024 		return;
1025 	}
1026 
1027 	if (S_ISDIR(sb.st_mode)) {
1028 		open_dir(c);
1029 		return;
1030 	}
1031 
1032 	c->type = REQUEST_FILE;
1033 	start_reply(c, SUCCESS, mime(c->conf, c->host, p));
1034 }
1035 
1036 void
1037 client_write(struct bufferevent *bev, void *d)
1038 {
1039 	struct client	*c = d;
1040 	struct evbuffer	*out = EVBUFFER_OUTPUT(bev);
1041 	char		 nam[PATH_MAX];
1042 	char		 buf[BUFSIZ];
1043 	ssize_t		 r;
1044 
1045 	switch (c->type) {
1046 	case REQUEST_UNDECIDED:
1047 		/*
1048 		 * Ignore spurious calls when we still don't have idea
1049 		 * what to do with the request.
1050 		 */
1051 		break;
1052 
1053 	case REQUEST_FILE:
1054 		if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1055 			log_warn("read");
1056 			client_error(bev, EVBUFFER_ERROR, c);
1057 			return;
1058 		} else if (r == 0) {
1059 			client_close(c);
1060 			return;
1061 		} else if (r != sizeof(buf))
1062 			c->type = REQUEST_DONE;
1063 		bufferevent_write(bev, buf, r);
1064 		break;
1065 
1066 	case REQUEST_DIR:
1067 		/* TODO: handle big big directories better */
1068 		for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1069 			const char *sufx = "";
1070 
1071 			encode_path(nam, sizeof(nam),
1072 			    c->dir[c->diroff]->d_name);
1073 			if (c->dir[c->diroff]->d_type == DT_DIR)
1074 				sufx = "/";
1075 			evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1076 			free(c->dir[c->diroff]);
1077 		}
1078 		free(c->dir);
1079 		c->dir = NULL;
1080 
1081 		c->type = REQUEST_DONE;
1082 
1083 		event_add(&c->bev->ev_write, NULL);
1084 		break;
1085 
1086 	case REQUEST_FCGI:
1087 	case REQUEST_PROXY:
1088 		/*
1089 		 * Here we depend on fastcgi or proxy connection to
1090 		 * provide data.
1091 		 */
1092 		break;
1093 
1094 	case REQUEST_DONE:
1095 		if (EVBUFFER_LENGTH(out) == 0)
1096 			client_close(c);
1097 		break;
1098 	}
1099 }
1100 
1101 static void
1102 client_error(struct bufferevent *bev, short error, void *d)
1103 {
1104 	struct client	*c = d;
1105 
1106 	c->type = REQUEST_DONE;
1107 
1108 	if (error & EVBUFFER_TIMEOUT) {
1109 		log_debug("timeout; forcefully closing the connection");
1110 		if (c->code == 0)
1111 			start_reply(c, BAD_REQUEST, "timeout");
1112 		else
1113 			client_close(c);
1114 		return;
1115 	}
1116 
1117 	if (error & EVBUFFER_EOF) {
1118 		client_close(c);
1119 		return;
1120 	}
1121 
1122 	log_warnx("unknown bufferevent error 0x%x", error);
1123 	client_close(c);
1124 }
1125 
1126 int
1127 start_reply(struct client *c, int code, const char *meta)
1128 {
1129 	struct evbuffer	*evb = EVBUFFER_OUTPUT(c->bev);
1130 	const char	*lang;
1131 	int		 r, rr;
1132 
1133 	bufferevent_enable(c->bev, EVBUFFER_WRITE);
1134 
1135 	c->code = code;
1136 	c->meta = meta;
1137 
1138 	r = evbuffer_add_printf(evb, "%d %s", code, meta);
1139 	if (r == -1)
1140 		goto err;
1141 
1142 	/* 2 digit status + space + 1024 max reply */
1143 	if (r > 1027)
1144 		goto overflow;
1145 
1146 	if (c->type != REQUEST_FCGI &&
1147 	    c->type != REQUEST_PROXY &&
1148 	    !strcmp(meta, "text/gemini") &&
1149 	    (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1150 		rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1151 		if (rr == -1)
1152 			goto err;
1153 		if (r + rr > 1027)
1154 			goto overflow;
1155 	}
1156 
1157 	bufferevent_write(c->bev, "\r\n", 2);
1158 
1159 	if (!vhost_disable_log(c->host, c->iri.path))
1160 		log_request(c, code, meta);
1161 
1162 	if (code != 20)
1163 		c->type = REQUEST_DONE;
1164 
1165 	return 0;
1166 
1167 err:
1168 	log_warnx("evbuffer_add_printf error: no memory");
1169 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1170 	c->type = REQUEST_DONE;
1171 	return -1;
1172 
1173 overflow:
1174 	log_warnx("reply header overflow");
1175 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1176 	start_reply(c, TEMP_FAILURE, "internal error");
1177 	return -1;
1178 }
1179 
1180 static void
1181 client_close_ev(int fd, short event, void *d)
1182 {
1183 	struct client	*c = d;
1184 
1185 	switch (tls_close(c->ctx)) {
1186 	case TLS_WANT_POLLIN:
1187 		event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1188 		return;
1189 	case TLS_WANT_POLLOUT:
1190 		event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1191 		return;
1192 	}
1193 
1194 	connected_clients--;
1195 
1196 	free(c->req);
1197 
1198 	tls_free(c->ctx);
1199 	c->ctx = NULL;
1200 
1201 	free(c->header);
1202 
1203 	if (c->pfd != -1)
1204 		close(c->pfd);
1205 
1206 	if (c->dir != NULL)
1207 		free(c->dir);
1208 
1209 	close(c->fd);
1210 	c->fd = -1;
1211 
1212 	free(c);
1213 }
1214 
1215 static void
1216 client_proxy_close(int fd, short event, void *d)
1217 {
1218 	struct tls *ctx = d;
1219 
1220 	if (ctx == NULL) {
1221 		close(fd);
1222 		return;
1223 	}
1224 
1225 	switch (tls_close(ctx)) {
1226 	case TLS_WANT_POLLIN:
1227 		event_once(fd, EV_READ, client_proxy_close, d, NULL);
1228 		break;
1229 	case TLS_WANT_POLLOUT:
1230 		event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1231 		break;
1232 	}
1233 
1234 	tls_free(ctx);
1235 	close(fd);
1236 }
1237 
1238 void
1239 client_close(struct client *c)
1240 {
1241 	/*
1242 	 * We may end up calling client_close in various situations
1243 	 * and for the most unexpected reasons.  Therefore, we need to
1244 	 * ensure that everything gets properly released once we reach
1245 	 * this point.
1246 	 */
1247 
1248 	SPLAY_REMOVE(client_tree_id, &clients, c);
1249 
1250 	if (c->cgibev != NULL) {
1251 		bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1252 		bufferevent_free(c->cgibev);
1253 		c->cgibev = NULL;
1254 		close(c->pfd);
1255 		c->pfd = -1;
1256 	}
1257 
1258 	if (c->bev != NULL) {
1259 		bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1260 		bufferevent_free(c->bev);
1261 	}
1262 
1263 	if (c->proxyevset &&
1264 	    event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1265 		c->proxyevset = 0;
1266 		event_del(&c->proxyev);
1267 	}
1268 
1269 	if (c->pfd != -1 && c->proxyctx != NULL) {
1270 		/* shut down the proxy TLS connection */
1271 		client_proxy_close(c->pfd, 0, c->proxyctx);
1272 		c->pfd = -1;
1273 	}
1274 
1275 	if (c->proxybev != NULL)
1276 		bufferevent_free(c->proxybev);
1277 
1278 	client_close_ev(c->fd, 0, c);
1279 }
1280 
1281 void
1282 server_accept(int sock, short et, void *d)
1283 {
1284 	struct address *addr = d;
1285 	struct client *c;
1286 	struct sockaddr_storage raddr;
1287 	struct sockaddr *sraddr;
1288 	socklen_t len;
1289 	int e, fd;
1290 
1291 	sraddr = (struct sockaddr *)&raddr;
1292 	len = sizeof(raddr);
1293 	if ((fd = accept(sock, sraddr, &len)) == -1) {
1294 		if (errno == EWOULDBLOCK || errno == EAGAIN ||
1295 		    errno == ECONNABORTED)
1296 			return;
1297 		fatal("accept");
1298 	}
1299 
1300 	mark_nonblock(fd);
1301 
1302 	c = xcalloc(1, sizeof(*c));
1303 	c->conf = addr->conf;
1304 	c->addr = addr;
1305 	c->id = ++server_client_id;
1306 	c->fd = fd;
1307 	c->pfd = -1;
1308 	memcpy(&c->raddr, &raddr, sizeof(raddr));
1309 	c->raddrlen = len;
1310 
1311 	e = getnameinfo(sraddr, len, c->rhost, sizeof(c->rhost),
1312 	    c->rserv, sizeof(c->rserv), NI_NUMERICHOST | NI_NUMERICSERV);
1313 	if (e != 0) {
1314 		log_warnx("getnameinfo failed: %s", gai_strerror(e));
1315 		close(c->fd);
1316 		free(c);
1317 		return;
1318 	}
1319 
1320 	if (tls_accept_socket(addr->ctx, &c->ctx, fd) == -1) {
1321 		log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1322 		close(c->fd);
1323 		free(c);
1324 		return;
1325 	}
1326 
1327 	SPLAY_INSERT(client_tree_id, &clients, c);
1328 	event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1329 	connected_clients++;
1330 }
1331 
1332 static void
1333 handle_siginfo(int fd, short ev, void *d)
1334 {
1335 	log_info("%d connected clients", connected_clients);
1336 }
1337 
1338 static void
1339 add_matching_kps(struct tls_config *tlsconf, struct address *addr,
1340     struct conf *conf)
1341 {
1342 	struct address	*vaddr;
1343 	struct vhost	*h;
1344 	int		 r, any = 0;
1345 
1346 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1347 		TAILQ_FOREACH(vaddr, &h->addrs, addrs) {
1348 			if (!match_addr(addr, vaddr))
1349 				continue;
1350 
1351 			if (!any) {
1352 				any = 1;
1353 				r = tls_config_set_keypair_ocsp_mem(tlsconf,
1354 				    h->cert, h->certlen, h->key, h->keylen,
1355 				    h->ocsp, h->ocsplen);
1356 			} else {
1357 				r = tls_config_add_keypair_ocsp_mem(tlsconf,
1358 				    h->cert, h->certlen, h->key, h->keylen,
1359 				    h->ocsp, h->ocsplen);
1360 			}
1361 
1362 			if (r == -1)
1363 				fatalx("failed to load keypair"
1364 				    " for host %s: %s", h->domain,
1365 				    tls_config_error(tlsconf));
1366 		}
1367 	}
1368 }
1369 
1370 static void
1371 setup_tls(struct conf *conf)
1372 {
1373 	struct tls_config	*tlsconf;
1374 	struct address		*addr;
1375 
1376 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1377 		if ((tlsconf = tls_config_new()) == NULL)
1378 			fatal("tls_config_new");
1379 
1380 		if (conf->use_privsep_crypto)
1381 			tls_config_use_fake_private_key(tlsconf);
1382 
1383 		/* optionally accept client certs but don't verify */
1384 		tls_config_verify_client_optional(tlsconf);
1385 		tls_config_insecure_noverifycert(tlsconf);
1386 
1387 		if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1388 			fatalx("tls_config_set_protocols: %s",
1389 			    tls_config_error(tlsconf));
1390 
1391 		add_matching_kps(tlsconf, addr, conf);
1392 
1393 		tls_reset(addr->ctx);
1394 		if (tls_configure(addr->ctx, tlsconf) == -1)
1395 			fatalx("tls_configure: %s", tls_error(addr->ctx));
1396 
1397 		tls_config_free(tlsconf);
1398 	}
1399 }
1400 
1401 static void
1402 load_vhosts(struct conf *conf)
1403 {
1404 	struct vhost	*h;
1405 	struct location	*l;
1406 	char		 path[PATH_MAX], *p;
1407 	int		 r;
1408 
1409 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1410 		TAILQ_FOREACH(l, &h->locations, locations) {
1411 			if (*l->dir == '\0')
1412 				continue;
1413 
1414 			p = l->dir;
1415 
1416 			if (conf->conftest && *conf->chroot != '\0') {
1417 				r = snprintf(path, sizeof(path), "%s/%s",
1418 				    conf->chroot, l->dir);
1419 				if (r < 0 || (size_t)r >= sizeof(path))
1420 					fatalx("path too long: %s", l->dir);
1421 				p = path;
1422 			}
1423 
1424 			l->dirfd = open(p, O_RDONLY | O_DIRECTORY);
1425 			if (l->dirfd == -1)
1426 				fatal("open %s for domain %s", l->dir,
1427 				    h->domain);
1428 		}
1429 	}
1430 }
1431 
1432 void
1433 server(struct privsep *ps, struct privsep_proc *p)
1434 {
1435 	proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1436 }
1437 
1438 void
1439 server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1440 {
1441 	struct conf *c;
1442 
1443 	SPLAY_INIT(&clients);
1444 
1445 #ifdef SIGINFO
1446 	signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1447 	signal_add(&siginfo, NULL);
1448 #endif
1449 	signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1450 	signal_add(&sigusr2, NULL);
1451 
1452 	sandbox_server_process();
1453 
1454 	/*
1455 	 * gemexp doesn't use the privsep crypto engine; it doesn't
1456 	 * use privsep at all so `ps' is NULL.
1457 	 */
1458 	if (ps != NULL) {
1459 		c = ps->ps_env;
1460 		if (c->use_privsep_crypto)
1461 			crypto_engine_init(ps->ps_env);
1462 	}
1463 }
1464 
1465 int
1466 server_configure_done(struct conf *conf)
1467 {
1468 	struct address *addr;
1469 
1470 	if (load_default_mime(&conf->mime) == -1)
1471 		fatal("can't load default mime");
1472 	sort_mime(&conf->mime);
1473 	setup_tls(conf);
1474 	load_vhosts(conf);
1475 
1476 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1477 		if (addr->sock != -1)
1478 			event_add(&addr->evsock, NULL);
1479 	}
1480 
1481 	return 0;
1482 }
1483 
1484 static int
1485 server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1486 {
1487 	struct privsep	*ps = p->p_ps;
1488 	struct conf	*conf = ps->ps_env;
1489 
1490 	switch (imsg_get_type(imsg)) {
1491 	case IMSG_RECONF_START:
1492 	case IMSG_RECONF_LOG_FMT:
1493 	case IMSG_RECONF_MIME:
1494 	case IMSG_RECONF_PROTOS:
1495 	case IMSG_RECONF_SOCK:
1496 	case IMSG_RECONF_FCGI:
1497 	case IMSG_RECONF_HOST:
1498 	case IMSG_RECONF_CERT:
1499 	case IMSG_RECONF_KEY:
1500 	case IMSG_RECONF_OCSP:
1501 	case IMSG_RECONF_HOST_ADDR:
1502 	case IMSG_RECONF_LOC:
1503 	case IMSG_RECONF_ENV:
1504 	case IMSG_RECONF_ALIAS:
1505 	case IMSG_RECONF_PROXY:
1506 	case IMSG_RECONF_PROXY_CERT:
1507 	case IMSG_RECONF_PROXY_KEY:
1508 		return config_recv(conf, imsg);
1509 	case IMSG_RECONF_END:
1510 		if (config_recv(conf, imsg) == -1)
1511 			return -1;
1512 		if (server_configure_done(conf) == -1)
1513 			return -1;
1514 		break;
1515 	default:
1516 		return -1;
1517 	}
1518 
1519 	return 0;
1520 }
1521 
1522 static int
1523 server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1524 {
1525 	return -1;
1526 }
1527 
1528 static int
1529 server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1530 {
1531 	return -1;
1532 }
1533 
1534 int
1535 client_tree_cmp(struct client *a, struct client *b)
1536 {
1537 	if (a->id == b->id)
1538 		return 0;
1539 	else if (a->id < b->id)
1540 		return -1;
1541 	else
1542 		return +1;
1543 }
1544 
1545 SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)