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Date:: Fri Aug 11 16:18:37 2023 UTC
Message:: fix comment (ge -> gemexp)
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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("tls_handshake failed: %s", tls_error(c->ctx));
377 		client_close(c);
378 		return;
379 	case TLS_WANT_POLLIN:
380 		event_once(c->fd, EV_READ, handle_handshake, c, NULL);
381 		return;
382 	case TLS_WANT_POLLOUT:
383 		event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
384 		return;
385 	default:
386 		/* unreachable */
387 		abort();
388 	}
389 
390 	c->bev = bufferevent_new(fd, client_read, client_write,
391 	    client_error, c);
392 	if (c->bev == NULL)
393 		fatal("%s: failed to allocate client buffer", __func__);
394 
395 	event_set(&c->bev->ev_read, c->fd, EV_READ,
396 	    client_tls_readcb, c->bev);
397 	event_set(&c->bev->ev_write, c->fd, EV_WRITE,
398 	    client_tls_writecb, c->bev);
399 
400 #if HAVE_LIBEVENT2
401 	evbuffer_unfreeze(c->bev->input, 0);
402 	evbuffer_unfreeze(c->bev->output, 1);
403 #endif
404 
405 	if ((servname = tls_conn_servername(c->ctx)) == NULL) {
406 		log_debug("handshake: missing SNI");
407 		goto err;
408 	}
409 
410 	if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
411 		log_info("puny_decode: %s", parse_err);
412 		goto err;
413 	}
414 
415 	TAILQ_FOREACH(h, &conf->hosts, vhosts)
416 		if (match_host(h, c))
417 			break;
418 
419 	log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
420 	    servname != NULL ? servname : "(null)",
421 	    c->domain,
422 	    h != NULL ? h->domain : "(null)");
423 
424 	if (h != NULL) {
425 		c->host = h;
426 		bufferevent_enable(c->bev, EV_READ);
427 		return;
428 	}
429 
430 err:
431 	start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
432 }
433 
434 static void
435 fmtbuf(char *buf, size_t buflen, const char *fmt, struct client *c,
436     const char *path)
437 {
438 	size_t i;
439 	char tmp[32];
440 
441 	*buf = '\0';
442 	memset(tmp, 0, sizeof(tmp));
443 	for (i = 0; *fmt; ++fmt) {
444 		if (i == sizeof(tmp)-1 || *fmt == '%') {
445 			strlcat(buf, tmp, buflen);
446 			memset(tmp, 0, sizeof(tmp));
447 			i = 0;
448 		}
449 
450 		if (*fmt != '%') {
451 			tmp[i++] = *fmt;
452 			continue;
453 		}
454 
455 		switch (*++fmt) {
456 		case '%':
457 			strlcat(buf, "%", buflen);
458 			break;
459 		case 'p':
460 			if (*path != '/')
461 				strlcat(buf, "/", buflen);
462 			strlcat(buf, path, buflen);
463 			break;
464 		case 'q':
465 			strlcat(buf, c->iri.query, buflen);
466 			break;
467 		case 'P':
468 			snprintf(tmp, sizeof(tmp), "%d", c->addr->port);
469 			strlcat(buf, tmp, buflen);
470 			memset(tmp, 0, sizeof(tmp));
471 			break;
472 		case 'N':
473 			strlcat(buf, c->domain, buflen);
474 			break;
475 		default:
476 			log_warnx("%s: unknown fmt specifier %c",
477 			    __func__, *fmt);
478 		}
479 	}
480 
481 	if (i != 0)
482 		strlcat(buf, tmp, buflen);
483 }
484 
485 /* 1 if a matching `block return' (and apply it), 0 otherwise */
486 static int
487 apply_block_return(struct client *c)
488 {
489 	char buf[GEMINI_URL_LEN];
490 	const char *fmt, *path;
491 	int code;
492 
493 	if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
494 		return 0;
495 
496 	path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
497 	fmtbuf(buf, sizeof(buf), fmt, c, path);
498 
499 	start_reply(c, code, buf);
500 	return 1;
501 }
502 
503 static struct proxy *
504 matched_proxy(struct client *c)
505 {
506 	struct proxy	*p;
507 	const char	*proto;
508 	const char	*host;
509 	const char	*port;
510 
511 	TAILQ_FOREACH(p, &c->host->proxies, proxies) {
512 		if (*(proto = p->match_proto) == '\0')
513 			proto = "gemini";
514 		if (*(host = p->match_host) == '\0')
515 			host = "*";
516 		if (*(port = p->match_port) == '\0')
517 			port = "*";
518 
519 		if (matches(proto, c->iri.schema) &&
520 		    matches(host, c->domain) &&
521 		    matches(port, c->iri.port))
522 			return p;
523 	}
524 
525 	return NULL;
526 }
527 
528 static int
529 check_matching_certificate(X509_STORE *store, struct client *c)
530 {
531 	const uint8_t	*cert;
532 	size_t		 len;
533 
534 	if (!tls_peer_cert_provided(c->ctx)) {
535 		start_reply(c, CLIENT_CERT_REQ, "client certificate required");
536 		return 1;
537 	}
538 
539 	cert = tls_peer_cert_chain_pem(c->ctx, &len);
540 	if (!validate_against_ca(store, cert, len)) {
541 		start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
542 		return 1;
543 	}
544 
545 	return 0;
546 }
547 
548 static int
549 proxy_socket(struct client *c, const char *host, const char *port)
550 {
551 	struct addrinfo hints, *res, *res0;
552 	int r, sock, save_errno;
553 	const char *cause = NULL;
554 
555 	memset(&hints, 0, sizeof(hints));
556 	hints.ai_family = AF_UNSPEC;
557 	hints.ai_socktype = SOCK_STREAM;
558 
559 	/* XXX: asr_run? :> */
560 	r = getaddrinfo(host, port, &hints, &res0);
561 	if (r != 0) {
562 		log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
563 		    host, port, gai_strerror(r));
564 		return -1;
565 	}
566 
567 	for (res = res0; res; res = res->ai_next) {
568 		sock = socket(res->ai_family, res->ai_socktype,
569 		    res->ai_protocol);
570 		if (sock == -1) {
571 			cause = "socket";
572 			continue;
573 		}
574 
575 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
576 			cause = "connect";
577 			save_errno = errno;
578 			close(sock);
579 			errno = save_errno;
580 			sock = -1;
581 			continue;
582 		}
583 
584 		break;
585 	}
586 
587 	if (sock == -1)
588 		log_warn("can't connect to %s:%s: %s", host, port, cause);
589 
590 	freeaddrinfo(res0);
591 
592 	return sock;
593 }
594 
595 /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
596 static int
597 apply_reverse_proxy(struct client *c)
598 {
599 	struct proxy	*p;
600 
601 	if ((p = matched_proxy(c)) == NULL)
602 		return 0;
603 
604 	c->proxy = p;
605 
606 	if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
607 		return 1;
608 
609 	log_debug("opening proxy connection for %s:%s",
610 	    p->host, p->port);
611 
612 	if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
613 		start_reply(c, PROXY_ERROR, "proxy error");
614 		return 1;
615 	}
616 
617 	mark_nonblock(c->pfd);
618 	if (proxy_init(c) == -1)
619 		start_reply(c, PROXY_ERROR, "proxy error");
620 
621 	return 1;
622 }
623 
624 static int
625 fcgi_open_sock(struct fcgi *f)
626 {
627 	struct sockaddr_un	addr;
628 	int			fd;
629 
630 	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
631 		log_warn("socket");
632 		return -1;
633 	}
634 
635 	memset(&addr, 0, sizeof(addr));
636 	addr.sun_family = AF_UNIX;
637 	strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
638 
639 	if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
640 		log_warn("failed to connect to %s", f->path);
641 		close(fd);
642 		return -1;
643 	}
644 
645 	return fd;
646 }
647 
648 static int
649 fcgi_open_conn(struct fcgi *f)
650 {
651 	struct addrinfo	 hints, *servinfo, *p;
652 	int		 r, sock, save_errno;
653 	const char	*cause = NULL;
654 
655 	memset(&hints, 0, sizeof(hints));
656 	hints.ai_family = AF_UNSPEC;
657 	hints.ai_socktype = SOCK_STREAM;
658 	hints.ai_flags = AI_ADDRCONFIG;
659 
660 	if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
661 		log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
662 		    gai_strerror(r));
663 		return -1;
664 	}
665 
666 	for (p = servinfo; p != NULL; p = p->ai_next) {
667 		sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
668 		if (sock == -1) {
669 			cause = "socket";
670 			continue;
671 		}
672 		if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
673 			cause = "connect";
674 			save_errno = errno;
675 			close(sock);
676 			errno = save_errno;
677 			continue;
678 		}
679 		break;
680 	}
681 
682 	if (p == NULL) {
683 		log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
684 		    cause);
685 		sock = -1;
686 	}
687 
688 	freeaddrinfo(servinfo);
689 	return sock;
690 }
691 
692 /* 1 if matching `fcgi' (and apply it), 0 otherwise */
693 static int
694 apply_fastcgi(struct client *c)
695 {
696 	int		 i = 0;
697 	struct fcgi	*f;
698 	struct location	*loc;
699 
700 	if ((loc = vhost_fastcgi(c->host, c->iri.path)) == NULL)
701 		return 0;
702 
703 	TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
704 		if (i == loc->fcgi)
705 			break;
706 		++i;
707 	}
708 
709 	if (f == NULL) {
710 		log_warnx("can't find fcgi #%d", loc->fcgi);
711 		return 0;
712 	}
713 
714 	log_debug("opening fastcgi connection for (%s,%s)",
715 	    f->path, f->port);
716 
717 	if (*f->port == '\0')
718 		c->pfd = fcgi_open_sock(f);
719 	else
720 		c->pfd = fcgi_open_conn(f);
721 
722 	if (c->pfd == -1) {
723 		start_reply(c, CGI_ERROR, "CGI error");
724 		return 1;
725 	}
726 
727 	mark_nonblock(c->pfd);
728 
729 	c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
730 	    fcgi_error, c);
731 	if (c->cgibev == NULL) {
732 		start_reply(c, TEMP_FAILURE, "internal server error");
733 		return 1;
734 	}
735 
736 	bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
737 	fcgi_req(c, loc);
738 
739 	return 1;
740 }
741 
742 /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
743 static int
744 apply_require_ca(struct client *c)
745 {
746 	X509_STORE	*store;
747 
748 	if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
749 		return 0;
750 	return check_matching_certificate(store, c);
751 }
752 
753 static void
754 server_dir_listing(struct client *c)
755 {
756 	int root;
757 
758 	root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
759 
760 	if (!vhost_auto_index(c->host, c->iri.path)) {
761 		start_reply(c, NOT_FOUND, "not found");
762 		return;
763 	}
764 
765 	c->dirlen = scandir_fd(c->pfd, &c->dir,
766 	    root ? select_non_dotdot : select_non_dot,
767 	    alphasort);
768 	if (c->dirlen == -1) {
769 		log_warn("scandir_fd(%d) (vhost:%s) %s",
770 		    c->pfd, c->host->domain, c->iri.path);
771 		start_reply(c, TEMP_FAILURE, "internal server error");
772 		return;
773 	}
774 
775 	c->type = REQUEST_DIR;
776 	start_reply(c, SUCCESS, "text/gemini");
777 	evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
778 	    "# Index of /%s\n\n", c->iri.path);
779 }
780 
781 static void
782 open_dir(struct client *c)
783 {
784 	struct stat sb;
785 	const char *index;
786 	char path[PATH_MAX];
787 	int fd = -1;
788 
789 	if (*c->iri.path != '\0' && !ends_with(c->iri.path, "/")) {
790 		redirect_canonical_dir(c);
791 		return;
792 	}
793 
794 	index = vhost_index(c->host, c->iri.path);
795 	fd = openat(c->pfd, index, O_RDONLY);
796 	if (fd == -1) {
797 		server_dir_listing(c);
798 		return;
799 	}
800 
801 	if (fstat(fd, &sb) == -1) {
802 		log_warn("fstat");
803 		close(fd);
804 		start_reply(c, TEMP_FAILURE, "internal server error");
805 		return;
806 	}
807 
808 	if (!S_ISREG(sb.st_mode)) {
809 		close(fd);
810 		server_dir_listing(c);
811 		return;
812 	}
813 
814 	strlcpy(path, c->iri.path, sizeof(path));
815 	strlcat(path, index, sizeof(path));
816 
817 	close(c->pfd);
818 	c->pfd = fd;
819 	c->type = REQUEST_FILE;
820 	start_reply(c, SUCCESS, mime(c->conf, c->host, path));
821 }
822 
823 static void
824 redirect_canonical_dir(struct client *c)
825 {
826 	char buf[GEMINI_URL_LEN];
827 	int r;
828 
829 	r = snprintf(buf, sizeof(buf), "/%s/", c->iri.path);
830 	if (r < 0 || (size_t)r >= sizeof(buf)) {
831 		start_reply(c, TEMP_FAILURE, "internal server error");
832 		return;
833 	}
834 
835 	start_reply(c, TEMP_REDIRECT, buf);
836 }
837 
838 static void
839 client_tls_readcb(int fd, short event, void *d)
840 {
841 	struct bufferevent	*bufev = d;
842 	struct client		*client = bufev->cbarg;
843 	ssize_t			 ret;
844 	size_t			 len;
845 	int			 what = EVBUFFER_READ;
846 	int			 howmuch = IBUF_READ_SIZE;
847 	char			 buf[IBUF_READ_SIZE];
848 
849 	if (event == EV_TIMEOUT) {
850 		what |= EVBUFFER_TIMEOUT;
851 		goto err;
852 	}
853 
854 	if (bufev->wm_read.high != 0)
855 		howmuch = MIN(sizeof(buf), bufev->wm_read.high);
856 
857 	switch (ret = tls_read(client->ctx, buf, howmuch)) {
858 	case TLS_WANT_POLLIN:
859 	case TLS_WANT_POLLOUT:
860 		goto retry;
861 	case -1:
862 		what |= EVBUFFER_ERROR;
863 		goto err;
864 	}
865 	len = ret;
866 
867 	if (len == 0) {
868 		what |= EVBUFFER_EOF;
869 		goto err;
870 	}
871 
872 	if (evbuffer_add(bufev->input, buf, len) == -1) {
873 		what |= EVBUFFER_ERROR;
874 		goto err;
875 	}
876 
877 	event_add(&bufev->ev_read, NULL);
878 	if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
879 		return;
880 	if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
881 		/*
882 		 * here we could implement a read pressure policy.
883 		 */
884 	}
885 
886 	if (bufev->readcb != NULL)
887 		(*bufev->readcb)(bufev, bufev->cbarg);
888 
889 	return;
890 
891 retry:
892 	event_add(&bufev->ev_read, NULL);
893 	return;
894 
895 err:
896 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
897 }
898 
899 static void
900 client_tls_writecb(int fd, short event, void *d)
901 {
902 	struct bufferevent	*bufev = d;
903 	struct client		*client = bufev->cbarg;
904 	ssize_t			 ret;
905 	size_t			 len;
906 	short			 what = EVBUFFER_WRITE;
907 
908 	if (event == EV_TIMEOUT) {
909 		what |= EVBUFFER_TIMEOUT;
910 		goto err;
911 	}
912 
913 	if (EVBUFFER_LENGTH(bufev->output) != 0) {
914 		ret = tls_write(client->ctx,
915 		    EVBUFFER_DATA(bufev->output),
916 		    EVBUFFER_LENGTH(bufev->output));
917 		switch (ret) {
918 		case TLS_WANT_POLLIN:
919 		case TLS_WANT_POLLOUT:
920 			goto retry;
921 		case -1:
922 			what |= EVBUFFER_ERROR;
923 			goto err;
924 		}
925 		len = ret;
926 		evbuffer_drain(bufev->output, len);
927 	}
928 
929 	if (EVBUFFER_LENGTH(bufev->output) != 0)
930 		event_add(&bufev->ev_write, NULL);
931 
932 	if (bufev->writecb != NULL &&
933 	    EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
934 		(*bufev->writecb)(bufev, bufev->cbarg);
935 	return;
936 
937 retry:
938 	event_add(&bufev->ev_write, NULL);
939 	return;
940 err:
941 	log_warnx("tls error: %s", tls_error(client->ctx));
942 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
943 }
944 
945 static void
946 client_read(struct bufferevent *bev, void *d)
947 {
948 	struct stat	 sb;
949 	struct client	*c = d;
950 	struct evbuffer	*src = EVBUFFER_INPUT(bev);
951 	const char	*path, *p, *parse_err = "invalid request";
952 	char		 decoded[DOMAIN_NAME_LEN];
953 
954 	bufferevent_disable(bev, EVBUFFER_READ);
955 
956 	/*
957 	 * libevent2 can still somehow call this function, even
958 	 * though I never enable EV_READ in the bufferevent.  If
959 	 * that's the case, bail out.
960 	 */
961 	if (c->type != REQUEST_UNDECIDED)
962 		return;
963 
964 	/* max url len + \r\n */
965 	if (EVBUFFER_LENGTH(src) > 1024 + 2) {
966 		log_debug("too much data received");
967 		start_reply(c, BAD_REQUEST, "bad request");
968 		return;
969 	}
970 
971 	c->req = evbuffer_readln(src, &c->reqlen, EVBUFFER_EOL_CRLF_STRICT);
972 	if (c->req == NULL) {
973 		/* not enough data yet. */
974 		bufferevent_enable(bev, EVBUFFER_READ);
975 		return;
976 	}
977 	if (c->reqlen > 1024+2) {
978 		log_debug("URL too long");
979 		start_reply(c, BAD_REQUEST, "bad request");
980 		return;
981 	}
982 
983 	if (!parse_iri(c->req, &c->iri, &parse_err) ||
984 	    !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
985 		log_debug("IRI parse error: %s", parse_err);
986 		start_reply(c, BAD_REQUEST, "bad request");
987 		return;
988 	}
989 
990 	if (apply_reverse_proxy(c))
991 		return;
992 
993 	/* ignore the port number */
994 	if (strcmp(c->iri.schema, "gemini") ||
995 	    strcmp(decoded, c->domain)) {
996 		start_reply(c, PROXY_REFUSED, "won't proxy request");
997 		return;
998 	}
999 
1000 	if (apply_require_ca(c) ||
1001 	    apply_block_return(c)||
1002 	    apply_fastcgi(c))
1003 		return;
1004 
1005 	path = c->iri.path;
1006 	p = strip_path(path, vhost_strip(c->host, path));
1007 	while (*p == '/')
1008 		p++;
1009 	if (*p == '\0')
1010 		p = ".";
1011 
1012 	c->pfd = openat(vhost_dirfd(c->host, path, &c->loc), p, O_RDONLY);
1013 	if (c->pfd == -1) {
1014 		if (errno == EACCES)
1015 			log_info("can't open %s: %s", p, strerror(errno));
1016 		start_reply(c, NOT_FOUND, "not found");
1017 		return;
1018 	}
1019 
1020 	if (fstat(c->pfd, &sb) == -1) {
1021 		log_warnx("fstat %s", path);
1022 		start_reply(c, TEMP_FAILURE, "internal server error");
1023 		return;
1024 	}
1025 
1026 	if (S_ISDIR(sb.st_mode)) {
1027 		open_dir(c);
1028 		return;
1029 	}
1030 
1031 	c->type = REQUEST_FILE;
1032 	start_reply(c, SUCCESS, mime(c->conf, c->host, p));
1033 }
1034 
1035 void
1036 client_write(struct bufferevent *bev, void *d)
1037 {
1038 	struct client	*c = d;
1039 	struct evbuffer	*out = EVBUFFER_OUTPUT(bev);
1040 	char		 nam[PATH_MAX];
1041 	char		 buf[BUFSIZ];
1042 	ssize_t		 r;
1043 
1044 	switch (c->type) {
1045 	case REQUEST_UNDECIDED:
1046 		/*
1047 		 * Ignore spurious calls when we still don't have idea
1048 		 * what to do with the request.
1049 		 */
1050 		break;
1051 
1052 	case REQUEST_FILE:
1053 		if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1054 			log_warn("read");
1055 			client_error(bev, EVBUFFER_ERROR, c);
1056 			return;
1057 		} else if (r == 0) {
1058 			client_close(c);
1059 			return;
1060 		} else if (r != sizeof(buf))
1061 			c->type = REQUEST_DONE;
1062 		bufferevent_write(bev, buf, r);
1063 		break;
1064 
1065 	case REQUEST_DIR:
1066 		/* TODO: handle big big directories better */
1067 		for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1068 			const char *sufx = "";
1069 
1070 			encode_path(nam, sizeof(nam),
1071 			    c->dir[c->diroff]->d_name);
1072 			if (c->dir[c->diroff]->d_type == DT_DIR)
1073 				sufx = "/";
1074 			evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1075 			free(c->dir[c->diroff]);
1076 		}
1077 		free(c->dir);
1078 		c->dir = NULL;
1079 
1080 		c->type = REQUEST_DONE;
1081 
1082 		event_add(&c->bev->ev_write, NULL);
1083 		break;
1084 
1085 	case REQUEST_FCGI:
1086 	case REQUEST_PROXY:
1087 		/*
1088 		 * Here we depend on fastcgi or proxy connection to
1089 		 * provide data.
1090 		 */
1091 		break;
1092 
1093 	case REQUEST_DONE:
1094 		if (EVBUFFER_LENGTH(out) == 0)
1095 			client_close(c);
1096 		break;
1097 	}
1098 }
1099 
1100 static void
1101 client_error(struct bufferevent *bev, short error, void *d)
1102 {
1103 	struct client	*c = d;
1104 
1105 	c->type = REQUEST_DONE;
1106 
1107 	if (error & EVBUFFER_TIMEOUT) {
1108 		log_debug("timeout; forcefully closing the connection");
1109 		if (c->code == 0)
1110 			start_reply(c, BAD_REQUEST, "timeout");
1111 		else
1112 			client_close(c);
1113 		return;
1114 	}
1115 
1116 	if (error & EVBUFFER_EOF) {
1117 		client_close(c);
1118 		return;
1119 	}
1120 
1121 	log_warnx("unknown bufferevent error 0x%x", error);
1122 	client_close(c);
1123 }
1124 
1125 int
1126 start_reply(struct client *c, int code, const char *meta)
1127 {
1128 	struct evbuffer	*evb = EVBUFFER_OUTPUT(c->bev);
1129 	const char	*lang;
1130 	int		 r, rr;
1131 
1132 	bufferevent_enable(c->bev, EVBUFFER_WRITE);
1133 
1134 	c->code = code;
1135 	c->meta = meta;
1136 
1137 	r = evbuffer_add_printf(evb, "%d %s", code, meta);
1138 	if (r == -1)
1139 		goto err;
1140 
1141 	/* 2 digit status + space + 1024 max reply */
1142 	if (r > 1027)
1143 		goto overflow;
1144 
1145 	if (c->type != REQUEST_FCGI &&
1146 	    c->type != REQUEST_PROXY &&
1147 	    !strcmp(meta, "text/gemini") &&
1148 	    (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1149 		rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1150 		if (rr == -1)
1151 			goto err;
1152 		if (r + rr > 1027)
1153 			goto overflow;
1154 	}
1155 
1156 	bufferevent_write(c->bev, "\r\n", 2);
1157 
1158 	if (!vhost_disable_log(c->host, c->iri.path))
1159 		log_request(c, code, meta);
1160 
1161 	if (code != 20)
1162 		c->type = REQUEST_DONE;
1163 
1164 	return 0;
1165 
1166 err:
1167 	log_warnx("evbuffer_add_printf error: no memory");
1168 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1169 	c->type = REQUEST_DONE;
1170 	return -1;
1171 
1172 overflow:
1173 	log_warnx("reply header overflow");
1174 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1175 	start_reply(c, TEMP_FAILURE, "internal error");
1176 	return -1;
1177 }
1178 
1179 static void
1180 client_close_ev(int fd, short event, void *d)
1181 {
1182 	struct client	*c = d;
1183 
1184 	switch (tls_close(c->ctx)) {
1185 	case TLS_WANT_POLLIN:
1186 		event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1187 		return;
1188 	case TLS_WANT_POLLOUT:
1189 		event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1190 		return;
1191 	}
1192 
1193 	connected_clients--;
1194 
1195 	free(c->req);
1196 
1197 	tls_free(c->ctx);
1198 	c->ctx = NULL;
1199 
1200 	free(c->header);
1201 
1202 	if (c->pfd != -1)
1203 		close(c->pfd);
1204 
1205 	if (c->dir != NULL)
1206 		free(c->dir);
1207 
1208 	close(c->fd);
1209 	c->fd = -1;
1210 
1211 	free(c);
1212 }
1213 
1214 static void
1215 client_proxy_close(int fd, short event, void *d)
1216 {
1217 	struct tls *ctx = d;
1218 
1219 	if (ctx == NULL) {
1220 		close(fd);
1221 		return;
1222 	}
1223 
1224 	switch (tls_close(ctx)) {
1225 	case TLS_WANT_POLLIN:
1226 		event_once(fd, EV_READ, client_proxy_close, d, NULL);
1227 		break;
1228 	case TLS_WANT_POLLOUT:
1229 		event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1230 		break;
1231 	}
1232 
1233 	tls_free(ctx);
1234 	close(fd);
1235 }
1236 
1237 void
1238 client_close(struct client *c)
1239 {
1240 	/*
1241 	 * We may end up calling client_close in various situations
1242 	 * and for the most unexpected reasons.  Therefore, we need to
1243 	 * ensure that everything gets properly released once we reach
1244 	 * this point.
1245 	 */
1246 
1247 	SPLAY_REMOVE(client_tree_id, &clients, c);
1248 
1249 	if (c->cgibev != NULL) {
1250 		bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1251 		bufferevent_free(c->cgibev);
1252 		c->cgibev = NULL;
1253 		close(c->pfd);
1254 		c->pfd = -1;
1255 	}
1256 
1257 	if (c->bev != NULL) {
1258 		bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1259 		bufferevent_free(c->bev);
1260 	}
1261 
1262 	if (c->proxyevset &&
1263 	    event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1264 		c->proxyevset = 0;
1265 		event_del(&c->proxyev);
1266 	}
1267 
1268 	if (c->pfd != -1 && c->proxyctx != NULL) {
1269 		/* shut down the proxy TLS connection */
1270 		client_proxy_close(c->pfd, 0, c->proxyctx);
1271 		c->pfd = -1;
1272 	}
1273 
1274 	if (c->proxybev != NULL)
1275 		bufferevent_free(c->proxybev);
1276 
1277 	client_close_ev(c->fd, 0, c);
1278 }
1279 
1280 void
1281 server_accept(int sock, short et, void *d)
1282 {
1283 	struct address *addr = d;
1284 	struct client *c;
1285 	struct sockaddr_storage raddr;
1286 	struct sockaddr *sraddr;
1287 	socklen_t len;
1288 	int e, fd;
1289 
1290 	sraddr = (struct sockaddr *)&raddr;
1291 	len = sizeof(raddr);
1292 	if ((fd = accept(sock, sraddr, &len)) == -1) {
1293 		if (errno == EWOULDBLOCK || errno == EAGAIN ||
1294 		    errno == ECONNABORTED)
1295 			return;
1296 		fatal("accept");
1297 	}
1298 
1299 	mark_nonblock(fd);
1300 
1301 	c = xcalloc(1, sizeof(*c));
1302 	c->conf = addr->conf;
1303 	c->addr = addr;
1304 	c->id = ++server_client_id;
1305 	c->fd = fd;
1306 	c->pfd = -1;
1307 	memcpy(&c->raddr, &raddr, sizeof(raddr));
1308 	c->raddrlen = len;
1309 
1310 	e = getnameinfo(sraddr, len, c->rhost, sizeof(c->rhost),
1311 	    c->rserv, sizeof(c->rserv), NI_NUMERICHOST | NI_NUMERICSERV);
1312 	if (e != 0) {
1313 		log_warnx("getnameinfo failed: %s", gai_strerror(e));
1314 		close(c->fd);
1315 		free(c);
1316 		return;
1317 	}
1318 
1319 	if (tls_accept_socket(addr->ctx, &c->ctx, fd) == -1) {
1320 		log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1321 		close(c->fd);
1322 		free(c);
1323 		return;
1324 	}
1325 
1326 	SPLAY_INSERT(client_tree_id, &clients, c);
1327 	event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1328 	connected_clients++;
1329 }
1330 
1331 struct client *
1332 client_by_id(int id)
1333 {
1334 	struct client find;
1335 
1336 	find.id = id;
1337 	return SPLAY_FIND(client_tree_id, &clients, &find);
1338 }
1339 
1340 static void
1341 handle_siginfo(int fd, short ev, void *d)
1342 {
1343 	log_info("%d connected clients", connected_clients);
1344 }
1345 
1346 static void
1347 add_matching_kps(struct tls_config *tlsconf, struct address *addr,
1348     struct conf *conf)
1349 {
1350 	struct address	*vaddr;
1351 	struct vhost	*h;
1352 	int		 r, any = 0;
1353 
1354 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1355 		TAILQ_FOREACH(vaddr, &h->addrs, addrs) {
1356 			if (!match_addr(addr, vaddr))
1357 				continue;
1358 
1359 			if (!any) {
1360 				any = 1;
1361 				r = tls_config_set_keypair_ocsp_mem(tlsconf,
1362 				    h->cert, h->certlen, h->key, h->keylen,
1363 				    h->ocsp, h->ocsplen);
1364 			} else {
1365 				r = tls_config_add_keypair_ocsp_mem(tlsconf,
1366 				    h->cert, h->certlen, h->key, h->keylen,
1367 				    h->ocsp, h->ocsplen);
1368 			}
1369 
1370 			if (r == -1)
1371 				fatalx("failed to load keypair"
1372 				    " for host %s: %s", h->domain,
1373 				    tls_config_error(tlsconf));
1374 		}
1375 	}
1376 }
1377 
1378 static void
1379 setup_tls(struct conf *conf)
1380 {
1381 	struct tls_config	*tlsconf;
1382 	struct address		*addr;
1383 
1384 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1385 		if ((tlsconf = tls_config_new()) == NULL)
1386 			fatal("tls_config_new");
1387 
1388 		if (conf->use_privsep_crypto)
1389 			tls_config_use_fake_private_key(tlsconf);
1390 
1391 		/* optionally accept client certs but don't verify */
1392 		tls_config_verify_client_optional(tlsconf);
1393 		tls_config_insecure_noverifycert(tlsconf);
1394 
1395 		if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1396 			fatalx("tls_config_set_protocols: %s",
1397 			    tls_config_error(tlsconf));
1398 
1399 		add_matching_kps(tlsconf, addr, conf);
1400 
1401 		tls_reset(addr->ctx);
1402 		if (tls_configure(addr->ctx, tlsconf) == -1)
1403 			fatalx("tls_configure: %s", tls_error(addr->ctx));
1404 
1405 		tls_config_free(tlsconf);
1406 	}
1407 }
1408 
1409 static void
1410 load_vhosts(struct conf *conf)
1411 {
1412 	struct vhost	*h;
1413 	struct location	*l;
1414 
1415 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1416 		TAILQ_FOREACH(l, &h->locations, locations) {
1417 			if (*l->dir == '\0')
1418 				continue;
1419 			l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1420 			if (l->dirfd == -1)
1421 				fatal("open %s for domain %s", l->dir,
1422 				    h->domain);
1423 		}
1424 	}
1425 }
1426 
1427 void
1428 server(struct privsep *ps, struct privsep_proc *p)
1429 {
1430 	proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1431 }
1432 
1433 void
1434 server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1435 {
1436 	struct conf *c;
1437 
1438 	SPLAY_INIT(&clients);
1439 
1440 #ifdef SIGINFO
1441 	signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1442 	signal_add(&siginfo, NULL);
1443 #endif
1444 	signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1445 	signal_add(&sigusr2, NULL);
1446 
1447 	sandbox_server_process();
1448 
1449 	/*
1450 	 * gemexp doesn't use the privsep crypto engine; it doesn't
1451 	 * use privsep at all so `ps' is NULL.
1452 	 */
1453 	if (ps != NULL) {
1454 		c = ps->ps_env;
1455 		if (c->use_privsep_crypto)
1456 			crypto_engine_init(ps->ps_env);
1457 	}
1458 }
1459 
1460 int
1461 server_configure_done(struct conf *conf)
1462 {
1463 	struct address *addr;
1464 
1465 	if (load_default_mime(&conf->mime) == -1)
1466 		fatal("can't load default mime");
1467 	sort_mime(&conf->mime);
1468 	setup_tls(conf);
1469 	load_vhosts(conf);
1470 
1471 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1472 		if (addr->sock != -1)
1473 			event_add(&addr->evsock, NULL);
1474 	}
1475 
1476 	return 0;
1477 }
1478 
1479 static int
1480 server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1481 {
1482 	struct privsep	*ps = p->p_ps;
1483 	struct conf	*conf = ps->ps_env;
1484 
1485 	switch (imsg->hdr.type) {
1486 	case IMSG_RECONF_START:
1487 	case IMSG_RECONF_LOG_FMT:
1488 	case IMSG_RECONF_MIME:
1489 	case IMSG_RECONF_PROTOS:
1490 	case IMSG_RECONF_SOCK:
1491 	case IMSG_RECONF_FCGI:
1492 	case IMSG_RECONF_HOST:
1493 	case IMSG_RECONF_CERT:
1494 	case IMSG_RECONF_KEY:
1495 	case IMSG_RECONF_OCSP:
1496 	case IMSG_RECONF_HOST_ADDR:
1497 	case IMSG_RECONF_LOC:
1498 	case IMSG_RECONF_ENV:
1499 	case IMSG_RECONF_ALIAS:
1500 	case IMSG_RECONF_PROXY:
1501 	case IMSG_RECONF_PROXY_CERT:
1502 	case IMSG_RECONF_PROXY_KEY:
1503 		return config_recv(conf, imsg);
1504 	case IMSG_RECONF_END:
1505 		if (config_recv(conf, imsg) == -1)
1506 			return -1;
1507 		if (server_configure_done(conf) == -1)
1508 			return -1;
1509 		break;
1510 	default:
1511 		return -1;
1512 	}
1513 
1514 	return 0;
1515 }
1516 
1517 static int
1518 server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1519 {
1520 	return -1;
1521 }
1522 
1523 static int
1524 server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1525 {
1526 	return -1;
1527 }
1528 
1529 int
1530 client_tree_cmp(struct client *a, struct client *b)
1531 {
1532 	if (a->id == b->id)
1533 		return 0;
1534 	else if (a->id < b->id)
1535 		return -1;
1536 	else
1537 		return +1;
1538 }
1539 
1540 SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)