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Date:: Sun Jul 23 19:04:37 2023 UTC
Message:: add `fastcgi off' to forceful skip fastcgi for a route
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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 const char *strip_path(const char*, int);
57 static void	 fmtbuf(char *, size_t, const char *, struct client *,
58 		    const char *);
59 static int	 apply_block_return(struct client*);
60 static int	 check_matching_certificate(X509_STORE *, struct client *);
61 static int	 apply_reverse_proxy(struct client *);
62 static int	 apply_fastcgi(struct client*);
63 static int	 apply_require_ca(struct client*);
64 static void	 open_dir(struct client*);
65 static void	 redirect_canonical_dir(struct client*);
66 
67 static void	 client_tls_readcb(int, short, void *);
68 static void	 client_tls_writecb(int, short, void *);
69 
70 static void	 client_read(struct bufferevent *, void *);
71 void		 client_write(struct bufferevent *, void *);
72 static void	 client_error(struct bufferevent *, short, void *);
73 
74 static void	 client_close_ev(int, short, void *);
75 
76 static void	 handle_siginfo(int, short, void*);
77 
78 static int	 server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
79 static int	 server_dispatch_crypto(int, struct privsep_proc *, struct imsg *);
80 static int	 server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
81 
82 static struct privsep_proc procs[] = {
83 	{ "parent",	PROC_PARENT,	server_dispatch_parent },
84 	{ "crypto",	PROC_CRYPTO,	server_dispatch_crypto },
85 	{ "logger",	PROC_LOGGER,	server_dispatch_logger },
86 };
87 
88 static uint32_t server_client_id;
89 
90 struct client_tree_id clients;
91 
92 static inline int
93 match_addr(struct address *target, struct address *source)
94 {
95 	return (target->ai_flags == source->ai_flags &&
96 	    target->ai_family == source->ai_family &&
97 	    target->ai_socktype == source->ai_socktype &&
98 	    target->ai_protocol == source->ai_protocol &&
99 	    target->slen == source->slen &&
100 	    !memcmp(&target->ss, &source->ss, target->slen));
101 }
102 
103 static inline int
104 matches(const char *pattern, const char *path)
105 {
106 	if (*path == '/')
107 		path++;
108 	return !fnmatch(pattern, path, 0);
109 }
110 
111 static inline int
112 match_host(struct vhost *v, struct client *c)
113 {
114 	struct alist *a;
115 	struct address *addr;
116 
117 	TAILQ_FOREACH(addr, &v->addrs, addrs)
118 		if (match_addr(addr, c->addr))
119 			break;
120 	if (addr == NULL)
121 		return 0;
122 
123 	if (matches(v->domain, c->domain))
124 		return 1;
125 
126 	TAILQ_FOREACH(a, &v->aliases, aliases)
127 		if (matches(a->alias, c->domain))
128 			return 1;
129 
130 	return 0;
131 }
132 
133 const char *
134 vhost_lang(struct vhost *v, const char *path)
135 {
136 	struct location *loc;
137 
138 	if (v == NULL || path == NULL)
139 		return NULL;
140 
141 	loc = TAILQ_FIRST(&v->locations);
142 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
143 		if (*loc->lang != '\0') {
144 			if (matches(loc->match, path))
145 				return loc->lang;
146 		}
147 	}
148 
149 	loc = TAILQ_FIRST(&v->locations);
150 	if (*loc->lang == '\0')
151 		return NULL;
152 	return loc->lang;
153 }
154 
155 const char *
156 vhost_default_mime(struct vhost *v, const char *path)
157 {
158 	struct location *loc;
159 	const char *default_mime = "application/octet-stream";
160 
161 	if (v == NULL || path == NULL)
162 		return default_mime;
163 
164 	loc = TAILQ_FIRST(&v->locations);
165 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
166 		if (*loc->default_mime != '\0') {
167 			if (matches(loc->match, path))
168 				return loc->default_mime;
169 		}
170 	}
171 
172 	loc = TAILQ_FIRST(&v->locations);
173 	if (*loc->default_mime != '\0')
174 		return loc->default_mime;
175 	return default_mime;
176 }
177 
178 const char *
179 vhost_index(struct vhost *v, const char *path)
180 {
181 	struct location *loc;
182 	const char *index = "index.gmi";
183 
184 	if (v == NULL || path == NULL)
185 		return index;
186 
187 	loc = TAILQ_FIRST(&v->locations);
188 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
189 		if (*loc->index != '\0') {
190 			if (matches(loc->match, path))
191 				return loc->index;
192 		}
193 	}
194 
195 	loc = TAILQ_FIRST(&v->locations);
196 	if (*loc->index != '\0')
197 		return loc->index;
198 	return index;
199 }
200 
201 int
202 vhost_auto_index(struct vhost *v, const char *path)
203 {
204 	struct location *loc;
205 
206 	if (v == NULL || path == NULL)
207 		return 0;
208 
209 	loc = TAILQ_FIRST(&v->locations);
210 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
211 		if (loc->auto_index != 0) {
212 			if (matches(loc->match, path))
213 				return loc->auto_index == 1;
214 		}
215 	}
216 
217 	loc = TAILQ_FIRST(&v->locations);
218 	return loc->auto_index == 1;
219 }
220 
221 int
222 vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
223 {
224 	struct location *loc;
225 
226 	if (v == NULL || path == NULL)
227 		return 0;
228 
229 	loc = TAILQ_FIRST(&v->locations);
230 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
231 		if (loc->block_code != 0) {
232 			if (matches(loc->match, path)) {
233 				*code = loc->block_code;
234 				*fmt = loc->block_fmt;
235 				return 1;
236 			}
237 		}
238 	}
239 
240 	loc = TAILQ_FIRST(&v->locations);
241 	*code = loc->block_code;
242 	*fmt = loc->block_fmt;
243 	return loc->block_code != 0;
244 }
245 
246 struct location *
247 vhost_fastcgi(struct vhost *v, const char *path)
248 {
249 	struct location *loc;
250 	int force_disable = 0;
251 
252 	if (v == NULL || path == NULL)
253 		return NULL;
254 
255 	loc = TAILQ_FIRST(&v->locations);
256 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
257 		if (loc->fcgi != -1)
258 			if (matches(loc->match, path))
259 				return loc;
260 		if (loc->nofcgi && matches(loc->match, path))
261 			force_disable = 1;
262 	}
263 
264 	if (force_disable)
265 		return NULL;
266 
267 	loc = TAILQ_FIRST(&v->locations);
268 	return loc->fcgi == -1 ? NULL : loc;
269 }
270 
271 int
272 vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
273 {
274 	struct location *loc;
275 	size_t		 l = 0;
276 
277 	if (v == NULL || path == NULL)
278 		return -1;
279 
280 	loc = TAILQ_FIRST(&v->locations);
281 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
282 		l++;
283 		if (loc->dirfd != -1)
284 			if (matches(loc->match, path)) {
285 				*retloc = l;
286 				return loc->dirfd;
287 			}
288 	}
289 
290 	*retloc = 0;
291 	loc = TAILQ_FIRST(&v->locations);
292 	return loc->dirfd;
293 }
294 
295 int
296 vhost_strip(struct vhost *v, const char *path)
297 {
298 	struct location *loc;
299 
300 	if (v == NULL || path == NULL)
301 		return 0;
302 
303 	loc = TAILQ_FIRST(&v->locations);
304 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
305 		if (loc->strip != 0) {
306 			if (matches(loc->match, path))
307 				return loc->strip;
308 		}
309 	}
310 
311 	loc = TAILQ_FIRST(&v->locations);
312 	return loc->strip;
313 }
314 
315 X509_STORE *
316 vhost_require_ca(struct vhost *v, const char *path)
317 {
318 	struct location *loc;
319 
320 	if (v == NULL || path == NULL)
321 		return NULL;
322 
323 	loc = TAILQ_FIRST(&v->locations);
324 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
325 		if (loc->reqca != NULL) {
326 			if (matches(loc->match, path))
327 				return loc->reqca;
328 		}
329 	}
330 
331 	loc = TAILQ_FIRST(&v->locations);
332 	return loc->reqca;
333 }
334 
335 int
336 vhost_disable_log(struct vhost *v, const char *path)
337 {
338 	struct location *loc;
339 
340 	if (v == NULL || path == NULL)
341 		return 0;
342 
343 	loc = TAILQ_FIRST(&v->locations);
344 	while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
345 		if (loc->disable_log && matches(loc->match, path))
346 				return 1;
347 	}
348 
349 	loc = TAILQ_FIRST(&v->locations);
350 	return loc->disable_log;
351 }
352 
353 void
354 mark_nonblock(int fd)
355 {
356 	int flags;
357 
358 	if ((flags = fcntl(fd, F_GETFL)) == -1)
359 		fatal("fcntl(F_GETFL)");
360 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
361 		fatal("fcntl(F_SETFL)");
362 }
363 
364 static void
365 handle_handshake(int fd, short ev, void *d)
366 {
367 	struct client *c = d;
368 	struct conf *conf = c->conf;
369 	struct vhost *h;
370 	const char *servname;
371 	const char *parse_err = "unknown error";
372 
373 	switch (tls_handshake(c->ctx)) {
374 	case 0:  /* success */
375 		break;
376 	case -1:
377 		log_warnx("tls_handshake failed: %s", 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 const char *
436 strip_path(const char *path, int strip)
437 {
438 	char *t;
439 
440 	while (strip > 0) {
441 		if ((t = strchr(path, '/')) == NULL) {
442 			path = strchr(path, '\0');
443 			break;
444 		}
445 		path = t;
446 		strip--;
447 	}
448 
449 	return path;
450 }
451 
452 static void
453 fmtbuf(char *buf, size_t buflen, const char *fmt, struct client *c,
454     const char *path)
455 {
456 	size_t i;
457 	char tmp[32];
458 
459 	*buf = '\0';
460 	memset(tmp, 0, sizeof(tmp));
461 	for (i = 0; *fmt; ++fmt) {
462 		if (i == sizeof(tmp)-1 || *fmt == '%') {
463 			strlcat(buf, tmp, buflen);
464 			memset(tmp, 0, sizeof(tmp));
465 			i = 0;
466 		}
467 
468 		if (*fmt != '%') {
469 			tmp[i++] = *fmt;
470 			continue;
471 		}
472 
473 		switch (*++fmt) {
474 		case '%':
475 			strlcat(buf, "%", buflen);
476 			break;
477 		case 'p':
478 			if (*path != '/')
479 				strlcat(buf, "/", buflen);
480 			strlcat(buf, path, buflen);
481 			break;
482 		case 'q':
483 			strlcat(buf, c->iri.query, buflen);
484 			break;
485 		case 'P':
486 			snprintf(tmp, sizeof(tmp), "%d", c->addr->port);
487 			strlcat(buf, tmp, buflen);
488 			memset(tmp, 0, sizeof(tmp));
489 			break;
490 		case 'N':
491 			strlcat(buf, c->domain, buflen);
492 			break;
493 		default:
494 			log_warnx("%s: unknown fmt specifier %c",
495 			    __func__, *fmt);
496 		}
497 	}
498 
499 	if (i != 0)
500 		strlcat(buf, tmp, buflen);
501 }
502 
503 /* 1 if a matching `block return' (and apply it), 0 otherwise */
504 static int
505 apply_block_return(struct client *c)
506 {
507 	char buf[GEMINI_URL_LEN];
508 	const char *fmt, *path;
509 	int code;
510 
511 	if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
512 		return 0;
513 
514 	path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
515 	fmtbuf(buf, sizeof(buf), fmt, c, path);
516 
517 	start_reply(c, code, buf);
518 	return 1;
519 }
520 
521 static struct proxy *
522 matched_proxy(struct client *c)
523 {
524 	struct proxy	*p;
525 	const char	*proto;
526 	const char	*host;
527 	const char	*port;
528 
529 	TAILQ_FOREACH(p, &c->host->proxies, proxies) {
530 		if (*(proto = p->match_proto) == '\0')
531 			proto = "gemini";
532 		if (*(host = p->match_host) == '\0')
533 			host = "*";
534 		if (*(port = p->match_port) == '\0')
535 			port = "*";
536 
537 		if (matches(proto, c->iri.schema) &&
538 		    matches(host, c->domain) &&
539 		    matches(port, c->iri.port))
540 			return p;
541 	}
542 
543 	return NULL;
544 }
545 
546 static int
547 check_matching_certificate(X509_STORE *store, struct client *c)
548 {
549 	const uint8_t	*cert;
550 	size_t		 len;
551 
552 	if (!tls_peer_cert_provided(c->ctx)) {
553 		start_reply(c, CLIENT_CERT_REQ, "client certificate required");
554 		return 1;
555 	}
556 
557 	cert = tls_peer_cert_chain_pem(c->ctx, &len);
558 	if (!validate_against_ca(store, cert, len)) {
559 		start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
560 		return 1;
561 	}
562 
563 	return 0;
564 }
565 
566 static int
567 proxy_socket(struct client *c, const char *host, const char *port)
568 {
569 	struct addrinfo hints, *res, *res0;
570 	int r, sock, save_errno;
571 	const char *cause = NULL;
572 
573 	memset(&hints, 0, sizeof(hints));
574 	hints.ai_family = AF_UNSPEC;
575 	hints.ai_socktype = SOCK_STREAM;
576 
577 	/* XXX: asr_run? :> */
578 	r = getaddrinfo(host, port, &hints, &res0);
579 	if (r != 0) {
580 		log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
581 		    host, port, gai_strerror(r));
582 		return -1;
583 	}
584 
585 	for (res = res0; res; res = res->ai_next) {
586 		sock = socket(res->ai_family, res->ai_socktype,
587 		    res->ai_protocol);
588 		if (sock == -1) {
589 			cause = "socket";
590 			continue;
591 		}
592 
593 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
594 			cause = "connect";
595 			save_errno = errno;
596 			close(sock);
597 			errno = save_errno;
598 			sock = -1;
599 			continue;
600 		}
601 
602 		break;
603 	}
604 
605 	if (sock == -1)
606 		log_warn("can't connect to %s:%s: %s", host, port, cause);
607 
608 	freeaddrinfo(res0);
609 
610 	return sock;
611 }
612 
613 /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
614 static int
615 apply_reverse_proxy(struct client *c)
616 {
617 	struct proxy	*p;
618 
619 	if ((p = matched_proxy(c)) == NULL)
620 		return 0;
621 
622 	c->proxy = p;
623 
624 	if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
625 		return 1;
626 
627 	log_debug("opening proxy connection for %s:%s",
628 	    p->host, p->port);
629 
630 	if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
631 		start_reply(c, PROXY_ERROR, "proxy error");
632 		return 1;
633 	}
634 
635 	mark_nonblock(c->pfd);
636 	if (proxy_init(c) == -1)
637 		start_reply(c, PROXY_ERROR, "proxy error");
638 
639 	return 1;
640 }
641 
642 static int
643 fcgi_open_sock(struct fcgi *f)
644 {
645 	struct sockaddr_un	addr;
646 	int			fd;
647 
648 	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
649 		log_warn("socket");
650 		return -1;
651 	}
652 
653 	memset(&addr, 0, sizeof(addr));
654 	addr.sun_family = AF_UNIX;
655 	strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
656 
657 	if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
658 		log_warn("failed to connect to %s", f->path);
659 		close(fd);
660 		return -1;
661 	}
662 
663 	return fd;
664 }
665 
666 static int
667 fcgi_open_conn(struct fcgi *f)
668 {
669 	struct addrinfo	 hints, *servinfo, *p;
670 	int		 r, sock, save_errno;
671 	const char	*cause = NULL;
672 
673 	memset(&hints, 0, sizeof(hints));
674 	hints.ai_family = AF_UNSPEC;
675 	hints.ai_socktype = SOCK_STREAM;
676 	hints.ai_flags = AI_ADDRCONFIG;
677 
678 	if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
679 		log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
680 		    gai_strerror(r));
681 		return -1;
682 	}
683 
684 	for (p = servinfo; p != NULL; p = p->ai_next) {
685 		sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
686 		if (sock == -1) {
687 			cause = "socket";
688 			continue;
689 		}
690 		if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
691 			cause = "connect";
692 			save_errno = errno;
693 			close(sock);
694 			errno = save_errno;
695 			continue;
696 		}
697 		break;
698 	}
699 
700 	if (p == NULL) {
701 		log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
702 		    cause);
703 		sock = -1;
704 	}
705 
706 	freeaddrinfo(servinfo);
707 	return sock;
708 }
709 
710 /* 1 if matching `fcgi' (and apply it), 0 otherwise */
711 static int
712 apply_fastcgi(struct client *c)
713 {
714 	int		 i = 0;
715 	struct fcgi	*f;
716 	struct location	*loc;
717 
718 	if ((loc = vhost_fastcgi(c->host, c->iri.path)) == NULL)
719 		return 0;
720 
721 	TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
722 		if (i == loc->fcgi)
723 			break;
724 		++i;
725 	}
726 
727 	if (f == NULL) {
728 		log_warnx("can't find fcgi #%d", loc->fcgi);
729 		return 0;
730 	}
731 
732 	log_debug("opening fastcgi connection for (%s,%s)",
733 	    f->path, f->port);
734 
735 	if (*f->port == '\0')
736 		c->pfd = fcgi_open_sock(f);
737 	else
738 		c->pfd = fcgi_open_conn(f);
739 
740 	if (c->pfd == -1) {
741 		start_reply(c, CGI_ERROR, "CGI error");
742 		return 1;
743 	}
744 
745 	mark_nonblock(c->pfd);
746 
747 	c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
748 	    fcgi_error, c);
749 	if (c->cgibev == NULL) {
750 		start_reply(c, TEMP_FAILURE, "internal server error");
751 		return 1;
752 	}
753 
754 	bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
755 	fcgi_req(c, loc);
756 
757 	return 1;
758 }
759 
760 /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
761 static int
762 apply_require_ca(struct client *c)
763 {
764 	X509_STORE	*store;
765 
766 	if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
767 		return 0;
768 	return check_matching_certificate(store, c);
769 }
770 
771 static void
772 server_dir_listing(struct client *c)
773 {
774 	int root;
775 
776 	root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
777 
778 	if (!vhost_auto_index(c->host, c->iri.path)) {
779 		start_reply(c, NOT_FOUND, "not found");
780 		return;
781 	}
782 
783 	c->dirlen = scandir_fd(c->pfd, &c->dir,
784 	    root ? select_non_dotdot : select_non_dot,
785 	    alphasort);
786 	if (c->dirlen == -1) {
787 		log_warn("scandir_fd(%d) (vhost:%s) %s",
788 		    c->pfd, c->host->domain, c->iri.path);
789 		start_reply(c, TEMP_FAILURE, "internal server error");
790 		return;
791 	}
792 
793 	c->type = REQUEST_DIR;
794 	start_reply(c, SUCCESS, "text/gemini");
795 	evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
796 	    "# Index of /%s\n\n", c->iri.path);
797 }
798 
799 static void
800 open_dir(struct client *c)
801 {
802 	struct stat sb;
803 	const char *index;
804 	char path[PATH_MAX];
805 	int fd = -1;
806 
807 	if (*c->iri.path != '\0' && !ends_with(c->iri.path, "/")) {
808 		redirect_canonical_dir(c);
809 		return;
810 	}
811 
812 	index = vhost_index(c->host, c->iri.path);
813 	fd = openat(c->pfd, index, O_RDONLY);
814 	if (fd == -1) {
815 		server_dir_listing(c);
816 		return;
817 	}
818 
819 	if (fstat(fd, &sb) == -1) {
820 		log_warn("fstat");
821 		close(fd);
822 		start_reply(c, TEMP_FAILURE, "internal server error");
823 		return;
824 	}
825 
826 	if (!S_ISREG(sb.st_mode)) {
827 		close(fd);
828 		server_dir_listing(c);
829 		return;
830 	}
831 
832 	strlcpy(path, c->iri.path, sizeof(path));
833 	strlcat(path, index, sizeof(path));
834 
835 	close(c->pfd);
836 	c->pfd = fd;
837 	c->type = REQUEST_FILE;
838 	start_reply(c, SUCCESS, mime(c->conf, c->host, path));
839 }
840 
841 static void
842 redirect_canonical_dir(struct client *c)
843 {
844 	char buf[GEMINI_URL_LEN];
845 	int r;
846 
847 	r = snprintf(buf, sizeof(buf), "/%s/", c->iri.path);
848 	if (r < 0 || (size_t)r >= sizeof(buf)) {
849 		start_reply(c, TEMP_FAILURE, "internal server error");
850 		return;
851 	}
852 
853 	start_reply(c, TEMP_REDIRECT, buf);
854 }
855 
856 static void
857 client_tls_readcb(int fd, short event, void *d)
858 {
859 	struct bufferevent	*bufev = d;
860 	struct client		*client = bufev->cbarg;
861 	ssize_t			 ret;
862 	size_t			 len;
863 	int			 what = EVBUFFER_READ;
864 	int			 howmuch = IBUF_READ_SIZE;
865 	char			 buf[IBUF_READ_SIZE];
866 
867 	if (event == EV_TIMEOUT) {
868 		what |= EVBUFFER_TIMEOUT;
869 		goto err;
870 	}
871 
872 	if (bufev->wm_read.high != 0)
873 		howmuch = MIN(sizeof(buf), bufev->wm_read.high);
874 
875 	switch (ret = tls_read(client->ctx, buf, howmuch)) {
876 	case TLS_WANT_POLLIN:
877 	case TLS_WANT_POLLOUT:
878 		goto retry;
879 	case -1:
880 		what |= EVBUFFER_ERROR;
881 		goto err;
882 	}
883 	len = ret;
884 
885 	if (len == 0) {
886 		what |= EVBUFFER_EOF;
887 		goto err;
888 	}
889 
890 	if (evbuffer_add(bufev->input, buf, len) == -1) {
891 		what |= EVBUFFER_ERROR;
892 		goto err;
893 	}
894 
895 	event_add(&bufev->ev_read, NULL);
896 	if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
897 		return;
898 	if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
899 		/*
900 		 * here we could implement a read pressure policy.
901 		 */
902 	}
903 
904 	if (bufev->readcb != NULL)
905 		(*bufev->readcb)(bufev, bufev->cbarg);
906 
907 	return;
908 
909 retry:
910 	event_add(&bufev->ev_read, NULL);
911 	return;
912 
913 err:
914 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
915 }
916 
917 static void
918 client_tls_writecb(int fd, short event, void *d)
919 {
920 	struct bufferevent	*bufev = d;
921 	struct client		*client = bufev->cbarg;
922 	ssize_t			 ret;
923 	size_t			 len;
924 	short			 what = EVBUFFER_WRITE;
925 
926 	if (event == EV_TIMEOUT) {
927 		what |= EVBUFFER_TIMEOUT;
928 		goto err;
929 	}
930 
931 	if (EVBUFFER_LENGTH(bufev->output) != 0) {
932 		ret = tls_write(client->ctx,
933 		    EVBUFFER_DATA(bufev->output),
934 		    EVBUFFER_LENGTH(bufev->output));
935 		switch (ret) {
936 		case TLS_WANT_POLLIN:
937 		case TLS_WANT_POLLOUT:
938 			goto retry;
939 		case -1:
940 			what |= EVBUFFER_ERROR;
941 			goto err;
942 		}
943 		len = ret;
944 		evbuffer_drain(bufev->output, len);
945 	}
946 
947 	if (EVBUFFER_LENGTH(bufev->output) != 0)
948 		event_add(&bufev->ev_write, NULL);
949 
950 	if (bufev->writecb != NULL &&
951 	    EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
952 		(*bufev->writecb)(bufev, bufev->cbarg);
953 	return;
954 
955 retry:
956 	event_add(&bufev->ev_write, NULL);
957 	return;
958 err:
959 	log_warnx("tls error: %s", tls_error(client->ctx));
960 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
961 }
962 
963 static void
964 client_read(struct bufferevent *bev, void *d)
965 {
966 	struct stat	 sb;
967 	struct client	*c = d;
968 	struct evbuffer	*src = EVBUFFER_INPUT(bev);
969 	const char	*path, *p, *parse_err = "invalid request";
970 	char		 decoded[DOMAIN_NAME_LEN];
971 
972 	bufferevent_disable(bev, EVBUFFER_READ);
973 
974 	/*
975 	 * libevent2 can still somehow call this function, even
976 	 * though I never enable EV_READ in the bufferevent.  If
977 	 * that's the case, bail out.
978 	 */
979 	if (c->type != REQUEST_UNDECIDED)
980 		return;
981 
982 	/* max url len + \r\n */
983 	if (EVBUFFER_LENGTH(src) > 1024 + 2) {
984 		log_debug("too much data received");
985 		start_reply(c, BAD_REQUEST, "bad request");
986 		return;
987 	}
988 
989 	c->req = evbuffer_readln(src, &c->reqlen, EVBUFFER_EOL_CRLF_STRICT);
990 	if (c->req == NULL) {
991 		/* not enough data yet. */
992 		bufferevent_enable(bev, EVBUFFER_READ);
993 		return;
994 	}
995 	if (c->reqlen > 1024+2) {
996 		log_debug("URL too long");
997 		start_reply(c, BAD_REQUEST, "bad request");
998 		return;
999 	}
1000 
1001 	if (!parse_iri(c->req, &c->iri, &parse_err) ||
1002 	    !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1003 		log_debug("IRI parse error: %s", parse_err);
1004 		start_reply(c, BAD_REQUEST, "bad request");
1005 		return;
1006 	}
1007 
1008 	if (apply_reverse_proxy(c))
1009 		return;
1010 
1011 	/* ignore the port number */
1012 	if (strcmp(c->iri.schema, "gemini") ||
1013 	    strcmp(decoded, c->domain)) {
1014 		start_reply(c, PROXY_REFUSED, "won't proxy request");
1015 		return;
1016 	}
1017 
1018 	if (apply_require_ca(c) ||
1019 	    apply_block_return(c)||
1020 	    apply_fastcgi(c))
1021 		return;
1022 
1023 	path = c->iri.path;
1024 	p = strip_path(path, vhost_strip(c->host, path));
1025 	while (*p == '/')
1026 		p++;
1027 	if (*p == '\0')
1028 		p = ".";
1029 
1030 	c->pfd = openat(vhost_dirfd(c->host, path, &c->loc), p, O_RDONLY);
1031 	if (c->pfd == -1) {
1032 		if (errno == EACCES)
1033 			log_info("can't open %s: %s", p, strerror(errno));
1034 		start_reply(c, NOT_FOUND, "not found");
1035 		return;
1036 	}
1037 
1038 	if (fstat(c->pfd, &sb) == -1) {
1039 		log_warnx("fstat %s", path);
1040 		start_reply(c, TEMP_FAILURE, "internal server error");
1041 		return;
1042 	}
1043 
1044 	if (S_ISDIR(sb.st_mode)) {
1045 		open_dir(c);
1046 		return;
1047 	}
1048 
1049 	c->type = REQUEST_FILE;
1050 	start_reply(c, SUCCESS, mime(c->conf, c->host, p));
1051 }
1052 
1053 void
1054 client_write(struct bufferevent *bev, void *d)
1055 {
1056 	struct client	*c = d;
1057 	struct evbuffer	*out = EVBUFFER_OUTPUT(bev);
1058 	char		 nam[PATH_MAX];
1059 	char		 buf[BUFSIZ];
1060 	ssize_t		 r;
1061 
1062 	switch (c->type) {
1063 	case REQUEST_UNDECIDED:
1064 		/*
1065 		 * Ignore spurious calls when we still don't have idea
1066 		 * what to do with the request.
1067 		 */
1068 		break;
1069 
1070 	case REQUEST_FILE:
1071 		if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1072 			log_warn("read");
1073 			client_error(bev, EVBUFFER_ERROR, c);
1074 			return;
1075 		} else if (r == 0) {
1076 			client_close(c);
1077 			return;
1078 		} else if (r != sizeof(buf))
1079 			c->type = REQUEST_DONE;
1080 		bufferevent_write(bev, buf, r);
1081 		break;
1082 
1083 	case REQUEST_DIR:
1084 		/* TODO: handle big big directories better */
1085 		for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1086 			const char *sufx = "";
1087 
1088 			encode_path(nam, sizeof(nam),
1089 			    c->dir[c->diroff]->d_name);
1090 			if (c->dir[c->diroff]->d_type == DT_DIR)
1091 				sufx = "/";
1092 			evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1093 			free(c->dir[c->diroff]);
1094 		}
1095 		free(c->dir);
1096 		c->dir = NULL;
1097 
1098 		c->type = REQUEST_DONE;
1099 
1100 		event_add(&c->bev->ev_write, NULL);
1101 		break;
1102 
1103 	case REQUEST_FCGI:
1104 	case REQUEST_PROXY:
1105 		/*
1106 		 * Here we depend on fastcgi or proxy connection to
1107 		 * provide data.
1108 		 */
1109 		break;
1110 
1111 	case REQUEST_DONE:
1112 		if (EVBUFFER_LENGTH(out) == 0)
1113 			client_close(c);
1114 		break;
1115 	}
1116 }
1117 
1118 static void
1119 client_error(struct bufferevent *bev, short error, void *d)
1120 {
1121 	struct client	*c = d;
1122 
1123 	c->type = REQUEST_DONE;
1124 
1125 	if (error & EVBUFFER_TIMEOUT) {
1126 		log_debug("timeout; forcefully closing the connection");
1127 		if (c->code == 0)
1128 			start_reply(c, BAD_REQUEST, "timeout");
1129 		else
1130 			client_close(c);
1131 		return;
1132 	}
1133 
1134 	if (error & EVBUFFER_EOF) {
1135 		client_close(c);
1136 		return;
1137 	}
1138 
1139 	log_warnx("unknown bufferevent error 0x%x", error);
1140 	client_close(c);
1141 }
1142 
1143 void
1144 start_reply(struct client *c, int code, const char *meta)
1145 {
1146 	struct evbuffer	*evb = EVBUFFER_OUTPUT(c->bev);
1147 	const char	*lang;
1148 	int		 r, rr;
1149 
1150 	bufferevent_enable(c->bev, EVBUFFER_WRITE);
1151 
1152 	c->code = code;
1153 	c->meta = meta;
1154 
1155 	r = evbuffer_add_printf(evb, "%d %s", code, meta);
1156 	if (r == -1)
1157 		goto err;
1158 
1159 	/* 2 digit status + space + 1024 max reply */
1160 	if (r > 1027)
1161 		goto overflow;
1162 
1163 	if (c->type != REQUEST_FCGI &&
1164 	    c->type != REQUEST_PROXY &&
1165 	    !strcmp(meta, "text/gemini") &&
1166 	    (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1167 		rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1168 		if (rr == -1)
1169 			goto err;
1170 		if (r + rr > 1027)
1171 			goto overflow;
1172 	}
1173 
1174 	bufferevent_write(c->bev, "\r\n", 2);
1175 
1176 	if (!vhost_disable_log(c->host, c->iri.path))
1177 		log_request(c, code, meta);
1178 
1179 	if (code != 20)
1180 		c->type = REQUEST_DONE;
1181 
1182 	return;
1183 
1184 err:
1185 	log_warnx("evbuffer_add_printf error: no memory");
1186 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1187 	client_close(c);
1188 	return;
1189 
1190 overflow:
1191 	log_warnx("reply header overflow");
1192 	evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1193 	start_reply(c, TEMP_FAILURE, "internal error");
1194 }
1195 
1196 static void
1197 client_close_ev(int fd, short event, void *d)
1198 {
1199 	struct client	*c = d;
1200 
1201 	switch (tls_close(c->ctx)) {
1202 	case TLS_WANT_POLLIN:
1203 		event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1204 		return;
1205 	case TLS_WANT_POLLOUT:
1206 		event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1207 		return;
1208 	}
1209 
1210 	connected_clients--;
1211 
1212 	free(c->req);
1213 
1214 	tls_free(c->ctx);
1215 	c->ctx = NULL;
1216 
1217 	free(c->header);
1218 
1219 	if (c->pfd != -1)
1220 		close(c->pfd);
1221 
1222 	if (c->dir != NULL)
1223 		free(c->dir);
1224 
1225 	close(c->fd);
1226 	c->fd = -1;
1227 
1228 	free(c);
1229 }
1230 
1231 static void
1232 client_proxy_close(int fd, short event, void *d)
1233 {
1234 	struct tls *ctx = d;
1235 
1236 	if (ctx == NULL) {
1237 		close(fd);
1238 		return;
1239 	}
1240 
1241 	switch (tls_close(ctx)) {
1242 	case TLS_WANT_POLLIN:
1243 		event_once(fd, EV_READ, client_proxy_close, d, NULL);
1244 		break;
1245 	case TLS_WANT_POLLOUT:
1246 		event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1247 		break;
1248 	}
1249 
1250 	tls_free(ctx);
1251 	close(fd);
1252 }
1253 
1254 void
1255 client_close(struct client *c)
1256 {
1257 	/*
1258 	 * We may end up calling client_close in various situations
1259 	 * and for the most unexpected reasons.  Therefore, we need to
1260 	 * ensure that everything gets properly released once we reach
1261 	 * this point.
1262 	 */
1263 
1264 	SPLAY_REMOVE(client_tree_id, &clients, c);
1265 
1266 	if (c->cgibev != NULL) {
1267 		bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1268 		bufferevent_free(c->cgibev);
1269 		c->cgibev = NULL;
1270 		close(c->pfd);
1271 		c->pfd = -1;
1272 	}
1273 
1274 	if (c->bev != NULL) {
1275 		bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1276 		bufferevent_free(c->bev);
1277 	}
1278 
1279 	if (c->proxyevset &&
1280 	    event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1281 		c->proxyevset = 0;
1282 		event_del(&c->proxyev);
1283 	}
1284 
1285 	if (c->pfd != -1 && c->proxyctx != NULL) {
1286 		/* shut down the proxy TLS connection */
1287 		client_proxy_close(c->pfd, 0, c->proxyctx);
1288 		c->pfd = -1;
1289 	}
1290 
1291 	if (c->proxybev != NULL)
1292 		bufferevent_free(c->proxybev);
1293 
1294 	client_close_ev(c->fd, 0, c);
1295 }
1296 
1297 void
1298 server_accept(int sock, short et, void *d)
1299 {
1300 	struct address *addr = d;
1301 	struct client *c;
1302 	struct sockaddr_storage raddr;
1303 	struct sockaddr *sraddr;
1304 	socklen_t len;
1305 	int e, fd;
1306 
1307 	sraddr = (struct sockaddr *)&raddr;
1308 	len = sizeof(raddr);
1309 	if ((fd = accept(sock, sraddr, &len)) == -1) {
1310 		if (errno == EWOULDBLOCK || errno == EAGAIN ||
1311 		    errno == ECONNABORTED)
1312 			return;
1313 		fatal("accept");
1314 	}
1315 
1316 	mark_nonblock(fd);
1317 
1318 	c = xcalloc(1, sizeof(*c));
1319 	c->conf = addr->conf;
1320 	c->addr = addr;
1321 	c->id = ++server_client_id;
1322 	c->fd = fd;
1323 	c->pfd = -1;
1324 	memcpy(&c->raddr, &raddr, sizeof(raddr));
1325 	c->raddrlen = len;
1326 
1327 	e = getnameinfo(sraddr, len, c->rhost, sizeof(c->rhost),
1328 	    c->rserv, sizeof(c->rserv), NI_NUMERICHOST | NI_NUMERICSERV);
1329 	if (e != 0) {
1330 		log_warnx("getnameinfo failed: %s", gai_strerror(e));
1331 		close(c->fd);
1332 		free(c);
1333 		return;
1334 	}
1335 
1336 	if (tls_accept_socket(addr->ctx, &c->ctx, fd) == -1) {
1337 		log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1338 		close(c->fd);
1339 		free(c);
1340 		return;
1341 	}
1342 
1343 	SPLAY_INSERT(client_tree_id, &clients, c);
1344 	event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1345 	connected_clients++;
1346 }
1347 
1348 struct client *
1349 client_by_id(int id)
1350 {
1351 	struct client find;
1352 
1353 	find.id = id;
1354 	return SPLAY_FIND(client_tree_id, &clients, &find);
1355 }
1356 
1357 static void
1358 handle_siginfo(int fd, short ev, void *d)
1359 {
1360 	log_info("%d connected clients", connected_clients);
1361 }
1362 
1363 static void
1364 add_matching_kps(struct tls_config *tlsconf, struct address *addr,
1365     struct conf *conf)
1366 {
1367 	struct address	*vaddr;
1368 	struct vhost	*h;
1369 	int		 r, any = 0;
1370 
1371 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1372 		TAILQ_FOREACH(vaddr, &h->addrs, addrs) {
1373 			if (!match_addr(addr, vaddr))
1374 				continue;
1375 
1376 			if (!any) {
1377 				any = 1;
1378 				r = tls_config_set_keypair_ocsp_mem(tlsconf,
1379 				    h->cert, h->certlen, h->key, h->keylen,
1380 				    h->ocsp, h->ocsplen);
1381 			} else {
1382 				r = tls_config_add_keypair_ocsp_mem(tlsconf,
1383 				    h->cert, h->certlen, h->key, h->keylen,
1384 				    h->ocsp, h->ocsplen);
1385 			}
1386 
1387 			if (r == -1)
1388 				fatalx("failed to load keypair"
1389 				    " for host %s: %s", h->domain,
1390 				    tls_config_error(tlsconf));
1391 		}
1392 	}
1393 }
1394 
1395 static void
1396 setup_tls(struct conf *conf)
1397 {
1398 	struct tls_config	*tlsconf;
1399 	struct address		*addr;
1400 
1401 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1402 		if ((tlsconf = tls_config_new()) == NULL)
1403 			fatal("tls_config_new");
1404 
1405 		if (conf->use_privsep_crypto)
1406 			tls_config_use_fake_private_key(tlsconf);
1407 
1408 		/* optionally accept client certs but don't verify */
1409 		tls_config_verify_client_optional(tlsconf);
1410 		tls_config_insecure_noverifycert(tlsconf);
1411 
1412 		if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1413 			fatalx("tls_config_set_protocols: %s",
1414 			    tls_config_error(tlsconf));
1415 
1416 		add_matching_kps(tlsconf, addr, conf);
1417 
1418 		tls_reset(addr->ctx);
1419 		if (tls_configure(addr->ctx, tlsconf) == -1)
1420 			fatalx("tls_configure: %s", tls_error(addr->ctx));
1421 
1422 		tls_config_free(tlsconf);
1423 	}
1424 }
1425 
1426 static void
1427 load_vhosts(struct conf *conf)
1428 {
1429 	struct vhost	*h;
1430 	struct location	*l;
1431 
1432 	TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1433 		TAILQ_FOREACH(l, &h->locations, locations) {
1434 			if (*l->dir == '\0')
1435 				continue;
1436 			l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1437 			if (l->dirfd == -1)
1438 				fatal("open %s for domain %s", l->dir,
1439 				    h->domain);
1440 		}
1441 	}
1442 }
1443 
1444 void
1445 server(struct privsep *ps, struct privsep_proc *p)
1446 {
1447 	proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1448 }
1449 
1450 void
1451 server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1452 {
1453 	struct conf *c;
1454 
1455 	SPLAY_INIT(&clients);
1456 
1457 #ifdef SIGINFO
1458 	signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1459 	signal_add(&siginfo, NULL);
1460 #endif
1461 	signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1462 	signal_add(&sigusr2, NULL);
1463 
1464 	sandbox_server_process();
1465 
1466 	/*
1467 	 * ge doesn't use the privsep crypto engine; it doesn't use
1468 	 * privsep at all so `ps' is NULL.
1469 	 */
1470 	if (ps != NULL) {
1471 		c = ps->ps_env;
1472 		if (c->use_privsep_crypto)
1473 			crypto_engine_init(ps->ps_env);
1474 	}
1475 }
1476 
1477 int
1478 server_configure_done(struct conf *conf)
1479 {
1480 	struct address *addr;
1481 
1482 	if (load_default_mime(&conf->mime) == -1)
1483 		fatal("can't load default mime");
1484 	sort_mime(&conf->mime);
1485 	setup_tls(conf);
1486 	load_vhosts(conf);
1487 
1488 	TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1489 		if (addr->sock != -1)
1490 			event_add(&addr->evsock, NULL);
1491 	}
1492 
1493 	return 0;
1494 }
1495 
1496 static int
1497 server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1498 {
1499 	struct privsep	*ps = p->p_ps;
1500 	struct conf	*conf = ps->ps_env;
1501 
1502 	switch (imsg->hdr.type) {
1503 	case IMSG_RECONF_START:
1504 	case IMSG_RECONF_MIME:
1505 	case IMSG_RECONF_PROTOS:
1506 	case IMSG_RECONF_SOCK:
1507 	case IMSG_RECONF_FCGI:
1508 	case IMSG_RECONF_HOST:
1509 	case IMSG_RECONF_CERT:
1510 	case IMSG_RECONF_KEY:
1511 	case IMSG_RECONF_OCSP:
1512 	case IMSG_RECONF_HOST_ADDR:
1513 	case IMSG_RECONF_LOC:
1514 	case IMSG_RECONF_ENV:
1515 	case IMSG_RECONF_ALIAS:
1516 	case IMSG_RECONF_PROXY:
1517 	case IMSG_RECONF_PROXY_CERT:
1518 	case IMSG_RECONF_PROXY_KEY:
1519 		return config_recv(conf, imsg);
1520 	case IMSG_RECONF_END:
1521 		if (config_recv(conf, imsg) == -1)
1522 			return -1;
1523 		if (server_configure_done(conf) == -1)
1524 			return -1;
1525 		break;
1526 	default:
1527 		return -1;
1528 	}
1529 
1530 	return 0;
1531 }
1532 
1533 static int
1534 server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1535 {
1536 	return -1;
1537 }
1538 
1539 static int
1540 server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1541 {
1542 	return -1;
1543 }
1544 
1545 int
1546 client_tree_cmp(struct client *a, struct client *b)
1547 {
1548 	if (a->id == b->id)
1549 		return 0;
1550 	else if (a->id < b->id)
1551 		return -1;
1552 	else
1553 		return +1;
1554 }
1555 
1556 SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)