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