1 /*
2  * Copyright (c) 2020, 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 
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <getopt.h>
24 #include <libgen.h>
25 #include <limits.h>
26 #include <grp.h>
27 #include <pwd.h>
28 #include <signal.h>
29 #include <string.h>
30 
31 static const char	*opts = "6c:D:d:fH:hnP:p:Vvx:";
32 
33 static const struct option longopts[] = {
34 	{"help",	no_argument,		NULL,	'h'},
35 	{"version",	no_argument,		NULL,	'V'},
36 	{NULL,		0,			NULL,	0},
37 };
38 
39 struct fcgi fcgi[FCGI_MAX];
40 
41 struct vhosthead hosts;
42 
43 int sock4, sock6;
44 
45 struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
46 
47 const char *config_path, *certs_dir, *hostname, *pidfile, *cgi;
48 
49 struct conf conf;
50 
51 struct tls_config *tlsconf;
52 struct tls *ctx;
53 
54 static void
55 dummy_handler(int signo)
56 {
57 	return;
58 }
59 
60 /* wrapper around dirname(3).  dn must be PATH_MAX+1 at least. */
61 static void
62 pdirname(const char *path, char *dn)
63 {
64 	char	 p[PATH_MAX+1];
65 	char	*t;
66 
67 	strlcpy(p, path, sizeof(p));
68 	t = dirname(p);
69 	memmove(dn, t, strlen(t)+1);
70 }
71 
72 static void
73 mkdirs(const char *path, mode_t mode)
74 {
75 	char	dname[PATH_MAX+1];
76 
77 	pdirname(path, dname);
78 	if (!strcmp(dname, "/"))
79 		return;
80 	mkdirs(dname, mode);
81 	if (mkdir(path, mode) != 0 && errno != EEXIST)
82 		fatal("can't mkdir %s: %s", path, strerror(errno));
83 }
84 
85 /* $XDG_DATA_HOME/gmid */
86 char *
87 data_dir(void)
88 {
89 	const char *home, *xdg;
90 	char *t;
91 
92 	if ((xdg = getenv("XDG_DATA_HOME")) == NULL) {
93 		if ((home = getenv("HOME")) == NULL)
94 			errx(1, "XDG_DATA_HOME and HOME both empty");
95 		if (asprintf(&t, "%s/.local/share/gmid", home) == -1)
96 			err(1, "asprintf");
97 	} else {
98 		if (asprintf(&t, "%s/gmid", xdg) == -1)
99 			err(1, "asprintf");
100 	}
101 
102 	mkdirs(t, 0755);
103 	return t;
104 }
105 
106 void
107 load_local_cert(const char *hostname, const char *dir)
108 {
109 	char *cert, *key;
110 	struct vhost *h;
111 
112 	if (asprintf(&cert, "%s/%s.cert.pem", dir, hostname) == -1)
113 		errx(1, "asprintf");
114 	if (asprintf(&key, "%s/%s.key.pem", dir, hostname) == -1)
115 		errx(1, "asprintf");
116 
117 	if (access(cert, R_OK) == -1 || access(key, R_OK) == -1)
118 		gen_certificate(hostname, cert, key);
119 
120 	h = TAILQ_FIRST(&hosts);
121 	h->cert = cert;
122 	h->key = key;
123 	h->domain = hostname;
124 }
125 
126 void
127 load_vhosts(void)
128 {
129 	struct vhost	*h;
130 	struct location	*l;
131 
132 	TAILQ_FOREACH(h, &hosts, vhosts) {
133 		TAILQ_FOREACH(l, &h->locations, locations) {
134 			if (l->dir == NULL)
135 				continue;
136 			if ((l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY)) == -1)
137 				fatal("open %s for domain %s: %s", l->dir, h->domain,
138 				    strerror(errno));
139 		}
140 	}
141 }
142 
143 int
144 make_socket(int port, int family)
145 {
146 	int sock, v;
147 	struct sockaddr_in addr4;
148 	struct sockaddr_in6 addr6;
149 	struct sockaddr *addr;
150 	socklen_t len;
151 
152 	switch (family) {
153 	case AF_INET:
154 		memset(&addr4, 0, sizeof(addr4));
155 		addr4.sin_family = family;
156 		addr4.sin_port = htons(port);
157 		addr4.sin_addr.s_addr = INADDR_ANY;
158 		addr = (struct sockaddr*)&addr4;
159 		len = sizeof(addr4);
160 		break;
161 
162 	case AF_INET6:
163 		memset(&addr6, 0, sizeof(addr6));
164 		addr6.sin6_family = AF_INET6;
165 		addr6.sin6_port = htons(port);
166 		addr6.sin6_addr = in6addr_any;
167 		addr = (struct sockaddr*)&addr6;
168 		len = sizeof(addr6);
169 		break;
170 
171 	default:
172 		/* unreachable */
173 		abort();
174 	}
175 
176 	if ((sock = socket(family, SOCK_STREAM, 0)) == -1)
177 		fatal("socket: %s", strerror(errno));
178 
179 	v = 1;
180 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v)) == -1)
181 		fatal("setsockopt(SO_REUSEADDR): %s", strerror(errno));
182 
183 	v = 1;
184 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, &v, sizeof(v)) == -1)
185 		fatal("setsockopt(SO_REUSEPORT): %s", strerror(errno));
186 
187 	mark_nonblock(sock);
188 
189 	if (bind(sock, addr, len) == -1)
190 		fatal("bind: %s", strerror(errno));
191 
192 	if (listen(sock, 16) == -1)
193 		fatal("listen: %s", strerror(errno));
194 
195 	return sock;
196 }
197 
198 static void
199 add_keypair(struct vhost *h)
200 {
201 	if (h->ocsp == NULL) {
202 		if (tls_config_add_keypair_file(tlsconf, h->cert, h->key) == -1)
203 			fatal("failed to load the keypair (%s, %s)",
204 			    h->cert, h->key);
205 	} else {
206 		if (tls_config_add_keypair_ocsp_file(tlsconf, h->cert, h->key,
207 		    h->ocsp) == -1)
208 			fatal("failed to load the keypair (%s, %s, %s)",
209 			    h->cert, h->key, h->ocsp);
210 	}
211 }
212 
213 void
214 setup_tls(void)
215 {
216 	struct vhost *h;
217 
218 	if ((tlsconf = tls_config_new()) == NULL)
219 		fatal("tls_config_new");
220 
221 	/* optionally accept client certs, but don't try to verify them */
222 	tls_config_verify_client_optional(tlsconf);
223 	tls_config_insecure_noverifycert(tlsconf);
224 
225 	if (tls_config_set_protocols(tlsconf, conf.protos) == -1)
226 		fatal("tls_config_set_protocols");
227 
228 	if ((ctx = tls_server()) == NULL)
229 		fatal("tls_server failure");
230 
231 	h = TAILQ_FIRST(&hosts);
232 
233 	/* we need to set something, then we can add how many key we want */
234 	if (tls_config_set_keypair_file(tlsconf, h->cert, h->key))
235 		fatal("tls_config_set_keypair_file failed for (%s, %s)",
236 		    h->cert, h->key);
237 
238 	/* same for OCSP */
239 	if (h->ocsp != NULL &&
240 	    tls_config_set_ocsp_staple_file(tlsconf, h->ocsp) == -1)
241 		fatal("tls_config_set_ocsp_staple_file failed for (%s)",
242 		    h->ocsp);
243 
244 	while ((h = TAILQ_NEXT(h, vhosts)) != NULL)
245 		add_keypair(h);
246 
247 	if (tls_configure(ctx, tlsconf) == -1)
248 		fatal("tls_configure: %s", tls_error(ctx));
249 }
250 
251 static int
252 listener_main(struct imsgbuf *ibuf)
253 {
254 	drop_priv();
255 	if (!conf.mime.skip_defaults && load_default_mime(&conf.mime) == -1)
256 		fatal("load_default_mime: %s", strerror(errno));
257 	sort_mime(&conf.mime);
258 	load_vhosts();
259 	loop(ctx, sock4, sock6, ibuf);
260 	return 0;
261 }
262 
263 void
264 init_config(void)
265 {
266 	TAILQ_INIT(&hosts);
267 
268 	conf.port = 1965;
269 	conf.ipv6 = 0;
270 	conf.protos = TLS_PROTOCOL_TLSv1_2 | TLS_PROTOCOL_TLSv1_3;
271 
272 	init_mime(&conf.mime);
273 
274 	conf.chroot = NULL;
275 	conf.user = NULL;
276 
277 	conf.prefork = 3;
278 }
279 
280 void
281 free_config(void)
282 {
283 	struct vhost *h, *th;
284 	struct location *l, *tl;
285 	struct proxy *p, *tp;
286 	struct envlist *e, *te;
287 	struct alist *a, *ta;
288 	int v, i;
289 
290 	v = conf.verbose;
291 
292 	free_mime(&conf.mime);
293 	free(conf.chroot);
294 	free(conf.user);
295 	memset(&conf, 0, sizeof(conf));
296 
297 	conf.verbose = v;
298 
299 	TAILQ_FOREACH_SAFE(h, &hosts, vhosts, th) {
300 		TAILQ_FOREACH_SAFE(l, &h->locations, locations, tl) {
301 			TAILQ_REMOVE(&h->locations, l, locations);
302 
303 			free((char*)l->match);
304 			free((char*)l->lang);
305 			free((char*)l->default_mime);
306 			free((char*)l->index);
307 			free((char*)l->block_fmt);
308 			free((char*)l->dir);
309 
310 			if (l->dirfd != -1)
311 				close(l->dirfd);
312 
313 			free(l);
314 		}
315 
316 		TAILQ_FOREACH_SAFE(e, &h->env, envs, te) {
317 			TAILQ_REMOVE(&h->env, e, envs);
318 
319 			free(e->name);
320 			free(e->value);
321 			free(e);
322 		}
323 
324 		TAILQ_FOREACH_SAFE(e, &h->params, envs, te) {
325 			TAILQ_REMOVE(&h->params, e, envs);
326 
327 			free(e->name);
328 			free(e->value);
329 			free(e);
330 		}
331 
332 		TAILQ_FOREACH_SAFE(a, &h->aliases, aliases, ta) {
333 			TAILQ_REMOVE(&h->aliases, a, aliases);
334 
335 			free(a->alias);
336 			free(a);
337 		}
338 
339 		TAILQ_FOREACH_SAFE(p, &h->proxies, proxies, tp) {
340 			TAILQ_REMOVE(&h->proxies, p, proxies);
341 
342 			free(p->match_proto);
343 			free(p->match_host);
344 			free(p->host);
345 			free(p->sni);
346 			tls_unload_file(p->cert, p->certlen);
347 			tls_unload_file(p->key, p->keylen);
348 			free(p);
349 		}
350 
351 		free((char*)h->domain);
352 		free((char*)h->cert);
353 		free((char*)h->key);
354 		free((char*)h->ocsp);
355 		free((char*)h->cgi);
356 		free((char*)h->entrypoint);
357 
358 		TAILQ_REMOVE(&hosts, h, vhosts);
359 		free(h);
360 	}
361 
362 	for (i = 0; i < FCGI_MAX; ++i) {
363 		if (fcgi[i].path == NULL && fcgi[i].prog == NULL)
364 			break;
365 		free(fcgi[i].path);
366 		free(fcgi[i].port);
367 		free(fcgi[i].prog);
368 
369 		fcgi[i].path = NULL;
370 		fcgi[i].port = NULL;
371 		fcgi[i].prog = NULL;
372 	}
373 
374 	tls_free(ctx);
375 	tls_config_free(tlsconf);
376 }
377 
378 static int
379 wait_signal(void)
380 {
381 	sigset_t mask;
382 	int signo;
383 
384 	sigemptyset(&mask);
385 	sigaddset(&mask, SIGHUP);
386 	sigaddset(&mask, SIGINT);
387 	sigaddset(&mask, SIGTERM);
388 	sigwait(&mask, &signo);
389 
390 	return signo == SIGHUP;
391 }
392 
393 void
394 drop_priv(void)
395 {
396 	struct passwd *pw = NULL;
397 
398 	if (conf.chroot != NULL && conf.user == NULL)
399 		fatal("can't chroot without an user to switch to after.");
400 
401 	if (conf.user != NULL) {
402 		if ((pw = getpwnam(conf.user)) == NULL)
403 			fatal("can't find user %s", conf.user);
404 	}
405 
406 	if (conf.chroot != NULL) {
407 		if (chroot(conf.chroot) != 0 || chdir("/") != 0)
408 			fatal("%s: %s", conf.chroot, strerror(errno));
409 	}
410 
411 	if (pw != NULL) {
412 		if (setgroups(1, &pw->pw_gid) == -1 ||
413 		    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1 ||
414 		    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
415 			fatal("cannot drop privileges");
416 	}
417 
418 	if (getuid() == 0)
419 		log_warn(NULL, "not a good idea to run a network daemon as root");
420 }
421 
422 static void
423 usage(void)
424 {
425 	fprintf(stderr,
426 	    "Version: " GMID_STRING "\n"
427 	    "Usage: %s [-fnv] [-c config] [-D macro=value] [-P pidfile]\n"
428 	    "       %s [-6hVv] [-d certs-dir] [-H hostname] [-p port] [-x cgi] [dir]\n",
429 	    getprogname(),
430 	    getprogname());
431 }
432 
433 static void
434 logger_init(void)
435 {
436 	int p[2];
437 
438 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, p) == -1)
439 		err(1, "socketpair");
440 
441 	switch (fork()) {
442 	case -1:
443 		err(1, "fork");
444 	case 0:
445 		signal(SIGHUP, SIG_IGN);
446 		close(p[0]);
447 		setproctitle("logger");
448 		imsg_init(&logibuf, p[1]);
449 		drop_priv();
450 		_exit(logger_main(p[1], &logibuf));
451 	default:
452 		close(p[1]);
453 		imsg_init(&logibuf, p[0]);
454 		return;
455 	}
456 }
457 
458 static int
459 serve(int argc, char **argv, struct imsgbuf *ibuf)
460 {
461 	char		 path[PATH_MAX];
462 	int		 i, p[2];
463 	struct vhost	*h;
464 	struct location	*l;
465 
466 	if (config_path == NULL) {
467 		if (hostname == NULL)
468 			hostname = "localhost";
469 		if (certs_dir == NULL)
470 			certs_dir = data_dir();
471 		load_local_cert(hostname, certs_dir);
472 
473 		h = TAILQ_FIRST(&hosts);
474 		h->domain = "*";
475 
476 		l = TAILQ_FIRST(&h->locations);
477 		l->auto_index = 1;
478 		l->match = "*";
479 
480 		switch (argc) {
481 		case 0:
482 			l->dir = getcwd(path, sizeof(path));
483 			break;
484 		case 1:
485 			l->dir = absolutify_path(argv[0]);
486 			break;
487 		default:
488 			usage();
489 			return 1;
490 		}
491 
492 		log_notice(NULL, "serving %s on port %d", l->dir, conf.port);
493 	}
494 
495 	/* setup tls before dropping privileges: we don't want user
496 	 * to put private certs inside the chroot. */
497 	setup_tls();
498 
499 	for (i = 0; i < conf.prefork; ++i) {
500 		if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC,
501 		    PF_UNSPEC, p) == -1)
502 			fatal("socketpair: %s", strerror(errno));
503 
504 		switch (fork()) {
505 		case -1:
506 			fatal("fork: %s", strerror(errno));
507 		case 0:		/* child */
508 			close(p[0]);
509 			imsg_init(&exibuf, p[1]);
510 			setproctitle("server");
511 			_exit(listener_main(&exibuf));
512 		default:
513 			close(p[1]);
514 			imsg_init(&servibuf[i], p[0]);
515 		}
516 	}
517 
518 	setproctitle("executor");
519 	drop_priv();
520 	_exit(executor_main(ibuf));
521 }
522 
523 static int
524 write_pidfile(const char *pidfile)
525 {
526 	struct flock	lock;
527 	int		fd;
528 
529 	if (pidfile == NULL)
530 		return -1;
531 
532 	if ((fd = open(pidfile, O_WRONLY|O_CREAT|O_CLOEXEC, 0600)) == -1)
533 		fatal("can't open pidfile %s: %s", pidfile, strerror(errno));
534 
535 	lock.l_start = 0;
536 	lock.l_len = 0;
537 	lock.l_type = F_WRLCK;
538 	lock.l_whence = SEEK_SET;
539 
540 	if (fcntl(fd, F_SETLK, &lock) == -1)
541 		fatal("can't lock %s, gmid is already running?", pidfile);
542 
543 	if (ftruncate(fd, 0) == -1)
544 		fatal("ftruncate: %s: %s", pidfile, strerror(errno));
545 
546 	dprintf(fd, "%d\n", getpid());
547 
548 	return fd;
549 }
550 
551 static void
552 setup_configless(int argc, char **argv, const char *cgi)
553 {
554 	struct vhost	*host;
555 	struct location	*loc;
556 
557 	host = xcalloc(1, sizeof(*host));
558 	host->cgi = cgi;
559 	TAILQ_INSERT_HEAD(&hosts, host, vhosts);
560 
561 	loc = xcalloc(1, sizeof(*loc));
562 	loc->fcgi = -1;
563 	TAILQ_INSERT_HEAD(&host->locations, loc, locations);
564 
565 	serve(argc, argv, NULL);
566 
567 	imsg_compose(&logibuf, IMSG_QUIT, 0, 0, -1, NULL, 0);
568 	imsg_flush(&logibuf);
569 }
570 
571 static int
572 parse_portno(const char *p)
573 {
574 	const char *errstr;
575 	int n;
576 
577 	n = strtonum(p, 0, UINT16_MAX, &errstr);
578 	if (errstr != NULL)
579 		yyerror("port number is %s: %s", errstr, p);
580 	return n;
581 }
582 
583 int
584 main(int argc, char **argv)
585 {
586 	struct imsgbuf exibuf;
587 	int ch, conftest = 0, configless = 0;
588 	int pidfd, old_ipv6, old_port;
589 
590 	logger_init();
591 	init_config();
592 
593 	while ((ch = getopt_long(argc, argv, opts, longopts, NULL)) != -1) {
594 		switch (ch) {
595 		case '6':
596 			conf.ipv6 = 1;
597 			configless = 1;
598 			break;
599 
600 		case 'c':
601 			config_path = absolutify_path(optarg);
602 			break;
603 
604 		case 'D':
605 			if (cmdline_symset(optarg) == -1)
606 				fatal("could not parse macro definition: %s",
607 				    optarg);
608 			break;
609 
610 		case 'd':
611 			certs_dir = optarg;
612 			configless = 1;
613 			break;
614 
615 		case 'f':
616 			conf.foreground = 1;
617 			break;
618 
619 		case 'H':
620 			hostname = optarg;
621 			configless = 1;
622 			break;
623 
624 		case 'h':
625 			usage();
626 			return 0;
627 
628 		case 'n':
629 			conftest++;
630 			break;
631 
632 		case 'P':
633 			pidfile = optarg;
634 			break;
635 
636 		case 'p':
637 			conf.port = parse_portno(optarg);
638 			configless = 1;
639 			break;
640 
641 		case 'V':
642 			puts("Version: " GMID_STRING);
643 			return 0;
644 
645 		case 'v':
646 			conf.verbose++;
647 			break;
648 
649 		case 'x':
650 			/* drop the starting / (if any) */
651 			if (*optarg == '/')
652 				optarg++;
653 			cgi = optarg;
654 			configless = 1;
655 			break;
656 
657 		default:
658 			usage();
659 			return 1;
660 		}
661 	}
662 	argc -= optind;
663 	argv += optind;
664 
665 	if (config_path == NULL) {
666 		configless = 1;
667 		conf.foreground = 1;
668 		conf.prefork = 1;
669 		conf.verbose++;
670 	}
671 
672 	if (config_path != NULL && (argc > 0 || configless))
673 		fatal("can't specify options in config mode.");
674 
675 	if (conftest) {
676 		if (config_path == NULL)
677 			fatal("missing configuration");
678 		parse_conf(config_path);
679 		fprintf(stderr, "config OK\n");
680 		if (conftest > 1)
681 			print_conf();
682 		return 0;
683 	}
684 
685 	if (!conf.foreground && !configless) {
686 		/* log to syslog */
687 		imsg_compose(&logibuf, IMSG_LOG_TYPE, 0, 0, -1, NULL, 0);
688 		imsg_flush(&logibuf);
689 
690 		if (daemon(1, 1) == -1)
691 			fatal("daemon: %s", strerror(errno));
692 	}
693 
694 	if (config_path != NULL)
695 		parse_conf(config_path);
696 
697 	sock4 = make_socket(conf.port, AF_INET);
698 	sock6 = -1;
699 	if (conf.ipv6)
700 		sock6 = make_socket(conf.port, AF_INET6);
701 
702 	signal(SIGPIPE, SIG_IGN);
703 	signal(SIGCHLD, SIG_IGN);
704 
705 	if (configless) {
706 		setup_configless(argc, argv, cgi);
707 		return 0;
708 	}
709 
710 	pidfd = write_pidfile(pidfile);
711 
712 	/*
713 	 * Linux seems to call the event handlers even when we're
714 	 * doing a sigwait.  These dummy handlers are here to avoid
715 	 * being terminated on SIGHUP, SIGINT or SIGTERM.
716 	 */
717 	signal(SIGHUP, dummy_handler);
718 	signal(SIGINT, dummy_handler);
719 	signal(SIGTERM, dummy_handler);
720 
721 	/* wait a sighup and reload the daemon */
722 	for (;;) {
723 		int p[2];
724 
725 		if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC,
726 		    PF_UNSPEC, p) == -1)
727 			fatal("socketpair: %s", strerror(errno));
728 
729 		switch (fork()) {
730 		case -1:
731 			fatal("fork: %s", strerror(errno));
732 		case 0:
733 			close(p[0]);
734 			imsg_init(&exibuf, p[1]);
735 			_exit(serve(argc, argv, &exibuf));
736 		}
737 
738 		close(p[1]);
739 		imsg_init(&exibuf, p[0]);
740 
741 		if (!wait_signal())
742 			break;
743 
744 		log_info(NULL, "reloading configuration %s", config_path);
745 
746 		/* close the executor (it'll close the servers too) */
747 		imsg_compose(&exibuf, IMSG_QUIT, 0, 0, -1, NULL, 0);
748 		imsg_flush(&exibuf);
749 		close(p[0]);
750 
751 		old_ipv6 = conf.ipv6;
752 		old_port = conf.port;
753 
754 		free_config();
755 		init_config();
756 		parse_conf(config_path);
757 
758 		if (old_port != conf.port) {
759 			close(sock4);
760 			close(sock6);
761 			sock4 = -1;
762 			sock6 = -1;
763 		}
764 
765 		if (sock6 != -1 && old_ipv6 != conf.ipv6) {
766 			close(sock6);
767 			sock6 = -1;
768 		}
769 
770 		if (sock4 == -1)
771 			sock4 = make_socket(conf.port, AF_INET);
772 		if (sock6 == -1 && conf.ipv6)
773 			sock6 = make_socket(conf.port, AF_INET6);
774 	}
775 
776 	imsg_compose(&exibuf, IMSG_QUIT, 0, 0, -1, NULL, 0);
777 	imsg_flush(&exibuf);
778 
779 	imsg_compose(&logibuf, IMSG_QUIT, 0, 0, -1, NULL, 0);
780 	imsg_flush(&logibuf);
781 
782 	if (pidfd != -1)
783 		close(pidfd);
784 
785 	return 0;
786 }