1 0126d91d 2022-09-07 op /*
  2 0126d91d 2022-09-07 op  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
  3 0126d91d 2022-09-07 op  *
  4 0126d91d 2022-09-07 op  * Permission to use, copy, modify, and distribute this software for any
  5 0126d91d 2022-09-07 op  * purpose with or without fee is hereby granted, provided that the above
  6 0126d91d 2022-09-07 op  * copyright notice and this permission notice appear in all copies.
  7 0126d91d 2022-09-07 op  *
  8 0126d91d 2022-09-07 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 0126d91d 2022-09-07 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 0126d91d 2022-09-07 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 0126d91d 2022-09-07 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 0126d91d 2022-09-07 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 0126d91d 2022-09-07 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 0126d91d 2022-09-07 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 0126d91d 2022-09-07 op  */
 16 0126d91d 2022-09-07 op 
 17 0126d91d 2022-09-07 op #include "gmid.h"
 18 0126d91d 2022-09-07 op 
 19 0126d91d 2022-09-07 op #include <sys/stat.h>
 20 0126d91d 2022-09-07 op #include <sys/wait.h>
 21 0126d91d 2022-09-07 op 
 22 0126d91d 2022-09-07 op #include <errno.h>
 23 0126d91d 2022-09-07 op #include <fcntl.h>
 24 0126d91d 2022-09-07 op #include <getopt.h>
 25 0126d91d 2022-09-07 op #include <libgen.h>
 26 0126d91d 2022-09-07 op #include <signal.h>
 27 0126d91d 2022-09-07 op #include <string.h>
 28 0126d91d 2022-09-07 op #include <unistd.h>
 29 0126d91d 2022-09-07 op 
 30 df5058c9 2023-06-05 op #include "log.h"
 31 df5058c9 2023-06-05 op 
 32 0126d91d 2022-09-07 op struct imsgbuf ibuf, logibuf;
 33 0126d91d 2022-09-07 op struct conf conf;
 34 0126d91d 2022-09-07 op 
 35 0126d91d 2022-09-07 op struct fcgi fcgi[FCGI_MAX];	/* just because it's referenced */
 36 0126d91d 2022-09-07 op struct vhosthead hosts;
 37 0126d91d 2022-09-07 op 
 38 0126d91d 2022-09-07 op 
 39 0126d91d 2022-09-07 op static const struct option opts[] = {
 40 0126d91d 2022-09-07 op 	{"help",	no_argument,	NULL,	'h'},
 41 0126d91d 2022-09-07 op 	{"version",	no_argument,	NULL,	'V'},
 42 0126d91d 2022-09-07 op 	{NULL,		0,		NULL,	0},
 43 0126d91d 2022-09-07 op };
 44 0126d91d 2022-09-07 op 
 45 0126d91d 2022-09-07 op void
 46 a01a91db 2023-06-05 op drop_priv(void)
 47 a01a91db 2023-06-05 op {
 48 a01a91db 2023-06-05 op 	return;
 49 a01a91db 2023-06-05 op }
 50 a01a91db 2023-06-05 op 
 51 a01a91db 2023-06-05 op void
 52 0126d91d 2022-09-07 op load_local_cert(struct vhost *h, const char *hostname, const char *dir)
 53 0126d91d 2022-09-07 op {
 54 0126d91d 2022-09-07 op 	char *cert, *key;
 55 0126d91d 2022-09-07 op 
 56 0126d91d 2022-09-07 op 	if (asprintf(&cert, "%s/%s.cert.pem", dir, hostname) == -1)
 57 0126d91d 2022-09-07 op 		errx(1, "asprintf");
 58 0126d91d 2022-09-07 op 	if (asprintf(&key, "%s/%s.key.pem", dir, hostname) == -1)
 59 0126d91d 2022-09-07 op 		errx(1, "asprintf");
 60 0126d91d 2022-09-07 op 
 61 0126d91d 2022-09-07 op 	if (access(cert, R_OK) == -1 || access(key, R_OK) == -1)
 62 0126d91d 2022-09-07 op 		gen_certificate(hostname, cert, key);
 63 0126d91d 2022-09-07 op 
 64 534afd0d 2022-10-05 op 	strlcpy(h->cert, cert, sizeof(h->cert));
 65 534afd0d 2022-10-05 op 	strlcpy(h->key, key, sizeof(h->key));
 66 534afd0d 2022-10-05 op 	strlcpy(h->domain, hostname, sizeof(h->domain));
 67 0126d91d 2022-09-07 op }
 68 0126d91d 2022-09-07 op 
 69 0126d91d 2022-09-07 op /* wrapper around dirname(3).  dn must be PATH_MAX+1 at least. */
 70 0126d91d 2022-09-07 op static void
 71 0126d91d 2022-09-07 op pdirname(const char *path, char *dn)
 72 0126d91d 2022-09-07 op {
 73 0126d91d 2022-09-07 op 	char	 p[PATH_MAX+1];
 74 0126d91d 2022-09-07 op 	char	*t;
 75 0126d91d 2022-09-07 op 
 76 0126d91d 2022-09-07 op 	strlcpy(p, path, sizeof(p));
 77 0126d91d 2022-09-07 op 	t = dirname(p);
 78 0126d91d 2022-09-07 op 	memmove(dn, t, strlen(t)+1);
 79 0126d91d 2022-09-07 op }
 80 0126d91d 2022-09-07 op 
 81 0126d91d 2022-09-07 op static void
 82 0126d91d 2022-09-07 op mkdirs(const char *path, mode_t mode)
 83 0126d91d 2022-09-07 op {
 84 0126d91d 2022-09-07 op 	char	dname[PATH_MAX+1];
 85 0126d91d 2022-09-07 op 
 86 0126d91d 2022-09-07 op 	pdirname(path, dname);
 87 0126d91d 2022-09-07 op 	if (!strcmp(dname, "/"))
 88 0126d91d 2022-09-07 op 		return;
 89 0126d91d 2022-09-07 op 	mkdirs(dname, mode);
 90 0126d91d 2022-09-07 op 	if (mkdir(path, mode) != 0 && errno != EEXIST)
 91 df5058c9 2023-06-05 op 		fatal("can't mkdir %s", path);
 92 0126d91d 2022-09-07 op }
 93 0126d91d 2022-09-07 op 
 94 0126d91d 2022-09-07 op /* $XDG_DATA_HOME/gmid */
 95 0126d91d 2022-09-07 op char *
 96 0126d91d 2022-09-07 op data_dir(void)
 97 0126d91d 2022-09-07 op {
 98 0126d91d 2022-09-07 op 	const char *home, *xdg;
 99 0126d91d 2022-09-07 op 	char *t;
100 0126d91d 2022-09-07 op 
101 0126d91d 2022-09-07 op 	if ((xdg = getenv("XDG_DATA_HOME")) == NULL) {
102 0126d91d 2022-09-07 op 		if ((home = getenv("HOME")) == NULL)
103 0126d91d 2022-09-07 op 			errx(1, "XDG_DATA_HOME and HOME both empty");
104 0126d91d 2022-09-07 op 		if (asprintf(&t, "%s/.local/share/gmid", home) == -1)
105 0126d91d 2022-09-07 op 			err(1, "asprintf");
106 0126d91d 2022-09-07 op 	} else {
107 0126d91d 2022-09-07 op 		if (asprintf(&t, "%s/gmid", xdg) == -1)
108 0126d91d 2022-09-07 op 			err(1, "asprintf");
109 0126d91d 2022-09-07 op 	}
110 0126d91d 2022-09-07 op 
111 0126d91d 2022-09-07 op 	mkdirs(t, 0755);
112 0126d91d 2022-09-07 op 	return t;
113 0126d91d 2022-09-07 op }
114 0126d91d 2022-09-07 op 
115 0126d91d 2022-09-07 op static void
116 0126d91d 2022-09-07 op logger_init(void)
117 0126d91d 2022-09-07 op {
118 0126d91d 2022-09-07 op 	int p[2];
119 0126d91d 2022-09-07 op 
120 0126d91d 2022-09-07 op 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, p) == -1)
121 0126d91d 2022-09-07 op 		err(1, "socketpair");
122 0126d91d 2022-09-07 op 
123 0126d91d 2022-09-07 op 	switch (fork()) {
124 0126d91d 2022-09-07 op 	case -1:
125 0126d91d 2022-09-07 op 		err(1, "fork");
126 0126d91d 2022-09-07 op 	case 0:
127 0126d91d 2022-09-07 op 		close(p[0]);
128 0126d91d 2022-09-07 op 		setproctitle("logger");
129 0126d91d 2022-09-07 op 		imsg_init(&logibuf, p[1]);
130 0126d91d 2022-09-07 op 		_exit(logger_main(p[1], &logibuf));
131 0126d91d 2022-09-07 op 	default:
132 0126d91d 2022-09-07 op 		close(p[1]);
133 0126d91d 2022-09-07 op 		imsg_init(&logibuf, p[0]);
134 0126d91d 2022-09-07 op 		return;
135 0126d91d 2022-09-07 op 	}
136 0126d91d 2022-09-07 op }
137 0126d91d 2022-09-07 op 
138 0126d91d 2022-09-07 op static int
139 0126d91d 2022-09-07 op serve(const char *host, int port, const char *dir, struct tls *ctx)
140 0126d91d 2022-09-07 op {
141 0126d91d 2022-09-07 op 	struct addrinfo hints, *res, *res0;
142 0126d91d 2022-09-07 op 	int error, saved_errno, sock = -1;
143 0126d91d 2022-09-07 op 	const char *cause = NULL;
144 0126d91d 2022-09-07 op 	char service[32];
145 0126d91d 2022-09-07 op 
146 0126d91d 2022-09-07 op 	if (snprintf(service, sizeof(service), "%d", port) < 0)
147 0126d91d 2022-09-07 op 		fatal("snprintf");
148 0126d91d 2022-09-07 op 
149 0126d91d 2022-09-07 op 	memset(&hints, 0, sizeof(hints));
150 0126d91d 2022-09-07 op 	hints.ai_family = AF_UNSPEC;
151 0126d91d 2022-09-07 op 	hints.ai_socktype = SOCK_STREAM;
152 0126d91d 2022-09-07 op 	hints.ai_flags = AI_PASSIVE;
153 0126d91d 2022-09-07 op 	error = getaddrinfo(host, service, &hints, &res0);
154 0126d91d 2022-09-07 op 	if (error)
155 df5058c9 2023-06-05 op 		fatalx("%s", gai_strerror(error));
156 0126d91d 2022-09-07 op 	for (res = res0; res; res = res->ai_next) {
157 0126d91d 2022-09-07 op 		sock = socket(res->ai_family, res->ai_socktype,
158 0126d91d 2022-09-07 op 		    res->ai_protocol);
159 0126d91d 2022-09-07 op 		if (sock == -1) {
160 0126d91d 2022-09-07 op 			cause = "socket";
161 0126d91d 2022-09-07 op 			continue;
162 0126d91d 2022-09-07 op 		}
163 0126d91d 2022-09-07 op 
164 0126d91d 2022-09-07 op 		if (bind(sock, res->ai_addr, res->ai_addrlen) == -1) {
165 0126d91d 2022-09-07 op 			cause = "bind";
166 0126d91d 2022-09-07 op 			saved_errno = errno;
167 0126d91d 2022-09-07 op 			close(sock);
168 0126d91d 2022-09-07 op 			errno = saved_errno;
169 0126d91d 2022-09-07 op 			continue;
170 0126d91d 2022-09-07 op 		}
171 0126d91d 2022-09-07 op 
172 0126d91d 2022-09-07 op 		if (listen(sock, 5) == -1)
173 0126d91d 2022-09-07 op 			fatal("listen");
174 0126d91d 2022-09-07 op 
175 0126d91d 2022-09-07 op 		/*
176 0126d91d 2022-09-07 op 		 * for the time being, we're happy as soon as
177 0126d91d 2022-09-07 op 		 * something binds.
178 0126d91d 2022-09-07 op 		 */
179 0126d91d 2022-09-07 op 		break;
180 0126d91d 2022-09-07 op 	}
181 0126d91d 2022-09-07 op 
182 0126d91d 2022-09-07 op 	if (sock == -1)
183 0126d91d 2022-09-07 op 		fatal("%s", cause);
184 0126d91d 2022-09-07 op 	freeaddrinfo(res0);
185 0126d91d 2022-09-07 op 
186 0126d91d 2022-09-07 op 	log_notice(NULL, "serving %s on port %d", dir, port);
187 a01a91db 2023-06-05 op 	return server_main(ctx, NULL, sock, -1);
188 0126d91d 2022-09-07 op }
189 0126d91d 2022-09-07 op 
190 0126d91d 2022-09-07 op static __dead void
191 0126d91d 2022-09-07 op usage(void)
192 0126d91d 2022-09-07 op {
193 0126d91d 2022-09-07 op 	fprintf(stderr,
194 c5b4db93 2022-09-10 op 	    "Version: " GE_STRING "\n"
195 0126d91d 2022-09-07 op 	    "Usage: %s [-hVv] [-d certs-dir] [-H hostname] [-p port] [dir]\n",
196 0126d91d 2022-09-07 op 	    getprogname());
197 0126d91d 2022-09-07 op 	exit(1);
198 0126d91d 2022-09-07 op }
199 0126d91d 2022-09-07 op 
200 0126d91d 2022-09-07 op int
201 0126d91d 2022-09-07 op main(int argc, char **argv)
202 0126d91d 2022-09-07 op {
203 0126d91d 2022-09-07 op 	struct tls_config *tlsconf;
204 0126d91d 2022-09-07 op 	struct tls *ctx;
205 0126d91d 2022-09-07 op 	struct vhost *host;
206 0126d91d 2022-09-07 op 	struct location *loc;
207 0126d91d 2022-09-07 op 	const char *errstr, *certs_dir = NULL, *hostname = "localhost";
208 0126d91d 2022-09-07 op 	char path[PATH_MAX];
209 0126d91d 2022-09-07 op 	int ch;
210 0126d91d 2022-09-07 op 
211 0126d91d 2022-09-07 op 	logger_init();
212 0126d91d 2022-09-07 op 	conf.port = 1965;
213 0126d91d 2022-09-07 op 
214 0126d91d 2022-09-07 op 	while ((ch = getopt_long(argc, argv, "d:H:hp:Vv", opts, NULL)) != -1) {
215 0126d91d 2022-09-07 op 		switch (ch) {
216 0126d91d 2022-09-07 op 		case 'd':
217 0126d91d 2022-09-07 op 			certs_dir = optarg;
218 0126d91d 2022-09-07 op 			break;
219 0126d91d 2022-09-07 op 		case 'H':
220 0126d91d 2022-09-07 op 			hostname = optarg;
221 0126d91d 2022-09-07 op 			break;
222 0126d91d 2022-09-07 op 		case 'h':
223 0126d91d 2022-09-07 op 			usage();
224 0126d91d 2022-09-07 op 			break;
225 0126d91d 2022-09-07 op 		case 'p':
226 0126d91d 2022-09-07 op 			conf.port = strtonum(optarg, 0, UINT16_MAX, &errstr);
227 0126d91d 2022-09-07 op 			if (errstr)
228 df5058c9 2023-06-05 op 				fatalx("port number is %s: %s", errstr,
229 df5058c9 2023-06-05 op 				    optarg);
230 0126d91d 2022-09-07 op 			break;
231 0126d91d 2022-09-07 op 		case 'V':
232 c5b4db93 2022-09-10 op 			puts("Version: " GE_STRING);
233 0126d91d 2022-09-07 op 			return 0;
234 0126d91d 2022-09-07 op 		default:
235 0126d91d 2022-09-07 op 			usage();
236 0126d91d 2022-09-07 op 			break;
237 0126d91d 2022-09-07 op 		}
238 0126d91d 2022-09-07 op 	}
239 0126d91d 2022-09-07 op 	argc -= optind;
240 0126d91d 2022-09-07 op 	argv += optind;
241 0126d91d 2022-09-07 op 
242 0126d91d 2022-09-07 op 	if (argc > 1)
243 0126d91d 2022-09-07 op 		usage();
244 0126d91d 2022-09-07 op 
245 0126d91d 2022-09-07 op 	/* prepare the configuration */
246 0126d91d 2022-09-07 op 	conf.verbose = 1;
247 0126d91d 2022-09-07 op 	init_mime(&conf.mime);
248 0126d91d 2022-09-07 op 
249 0126d91d 2022-09-07 op 	if (certs_dir == NULL)
250 0126d91d 2022-09-07 op 		certs_dir = data_dir();
251 0126d91d 2022-09-07 op 
252 0126d91d 2022-09-07 op 	/* set up the implicit vhost and location */
253 0126d91d 2022-09-07 op 
254 0126d91d 2022-09-07 op 	host = xcalloc(1, sizeof(*host));
255 0126d91d 2022-09-07 op 	TAILQ_INSERT_HEAD(&hosts, host, vhosts);
256 0126d91d 2022-09-07 op 
257 0126d91d 2022-09-07 op 	loc = xcalloc(1, sizeof(*loc));
258 0126d91d 2022-09-07 op 	loc->fcgi = -1;
259 0126d91d 2022-09-07 op 	TAILQ_INSERT_HEAD(&host->locations, loc, locations);
260 0126d91d 2022-09-07 op 
261 0126d91d 2022-09-07 op 	load_local_cert(host, hostname, certs_dir);
262 0126d91d 2022-09-07 op 
263 534afd0d 2022-10-05 op 	strlcpy(host->domain, "*", sizeof(host->domain));
264 0126d91d 2022-09-07 op 	loc->auto_index = 1;
265 534afd0d 2022-10-05 op 	strlcpy(loc->match, "*", sizeof(loc->match));
266 0126d91d 2022-09-07 op 
267 0126d91d 2022-09-07 op 	if (*argv == NULL) {
268 0126d91d 2022-09-07 op 		if (getcwd(path, sizeof(path)) == NULL)
269 0126d91d 2022-09-07 op 			fatal("getcwd");
270 534afd0d 2022-10-05 op 		strlcpy(loc->dir, path, sizeof(loc->dir));
271 534afd0d 2022-10-05 op 	} else {
272 534afd0d 2022-10-05 op 		char	*tmp;
273 0126d91d 2022-09-07 op 
274 534afd0d 2022-10-05 op 		tmp = absolutify_path(*argv);
275 534afd0d 2022-10-05 op 		strlcpy(loc->dir, tmp, sizeof(loc->dir));
276 534afd0d 2022-10-05 op 		free(tmp);
277 534afd0d 2022-10-05 op 	}
278 534afd0d 2022-10-05 op 
279 0126d91d 2022-09-07 op 	/* setup tls */
280 0126d91d 2022-09-07 op 
281 0126d91d 2022-09-07 op 	if ((tlsconf = tls_config_new()) == NULL)
282 df5058c9 2023-06-05 op 		fatal("tls_config_new");
283 0126d91d 2022-09-07 op 
284 0126d91d 2022-09-07 op 	/* optionally accept client certs but don't try to verify them */
285 0126d91d 2022-09-07 op 	tls_config_verify_client_optional(tlsconf);
286 0126d91d 2022-09-07 op 	tls_config_insecure_noverifycert(tlsconf);
287 0126d91d 2022-09-07 op 
288 0126d91d 2022-09-07 op 	if ((ctx = tls_server()) == NULL)
289 df5058c9 2023-06-05 op 		fatal("tls_server failure");
290 0126d91d 2022-09-07 op 
291 0126d91d 2022-09-07 op 	if (tls_config_set_keypair_file(tlsconf, host->cert, host->key))
292 df5058c9 2023-06-05 op 		fatalx("can't load the keypair (%s, %s): %s",
293 df5058c9 2023-06-05 op 		    host->cert, host->key, tls_config_error(tlsconf));
294 0126d91d 2022-09-07 op 
295 0126d91d 2022-09-07 op 	if (tls_configure(ctx, tlsconf) == -1)
296 df5058c9 2023-06-05 op 		fatalx("tls_configure: %s", tls_error(ctx));
297 0126d91d 2022-09-07 op 
298 0126d91d 2022-09-07 op 	/* start the server */
299 0126d91d 2022-09-07 op 	signal(SIGPIPE, SIG_IGN);
300 0126d91d 2022-09-07 op 	setproctitle("%s", loc->dir);
301 0126d91d 2022-09-07 op 	return serve(hostname, conf.port, loc->dir, ctx);
302 0126d91d 2022-09-07 op }