1 a596b957 2022-07-14 tracey /*
  2 a596b957 2022-07-14 tracey  * Copyright (c) 2016, 2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
  3 a596b957 2022-07-14 tracey  * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
  4 a596b957 2022-07-14 tracey  * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
  5 a596b957 2022-07-14 tracey  * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
  6 a596b957 2022-07-14 tracey  *
  7 a596b957 2022-07-14 tracey  * Permission to use, copy, modify, and distribute this software for any
  8 a596b957 2022-07-14 tracey  * purpose with or without fee is hereby granted, provided that the above
  9 a596b957 2022-07-14 tracey  * copyright notice and this permission notice appear in all copies.
 10 a596b957 2022-07-14 tracey  *
 11 a596b957 2022-07-14 tracey  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 12 a596b957 2022-07-14 tracey  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 13 a596b957 2022-07-14 tracey  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 14 a596b957 2022-07-14 tracey  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 15 a596b957 2022-07-14 tracey  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 16 a596b957 2022-07-14 tracey  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 17 a596b957 2022-07-14 tracey  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 18 a596b957 2022-07-14 tracey  */
 19 a596b957 2022-07-14 tracey 
 20 a596b957 2022-07-14 tracey #include <sys/param.h>
 21 a596b957 2022-07-14 tracey #include <sys/ioctl.h>
 22 a596b957 2022-07-14 tracey #include <sys/queue.h>
 23 a596b957 2022-07-14 tracey #include <sys/wait.h>
 24 a596b957 2022-07-14 tracey #include <sys/uio.h>
 25 a596b957 2022-07-14 tracey #include <sys/resource.h>
 26 a596b957 2022-07-14 tracey #include <sys/socket.h>
 27 a596b957 2022-07-14 tracey #include <sys/stat.h>
 28 a596b957 2022-07-14 tracey #include <sys/time.h>
 29 a596b957 2022-07-14 tracey #include <sys/types.h>
 30 a596b957 2022-07-14 tracey #include <sys/mman.h>
 31 a596b957 2022-07-14 tracey #include <sys/un.h>
 32 a596b957 2022-07-14 tracey 
 33 a596b957 2022-07-14 tracey #include <net/if.h>
 34 a596b957 2022-07-14 tracey #include <netinet/in.h>
 35 a596b957 2022-07-14 tracey 
 36 a596b957 2022-07-14 tracey #include <errno.h>
 37 a596b957 2022-07-14 tracey #include <event.h>
 38 a596b957 2022-07-14 tracey #include <fcntl.h>
 39 a596b957 2022-07-14 tracey #include <ifaddrs.h>
 40 a596b957 2022-07-14 tracey #include <imsg.h>
 41 a596b957 2022-07-14 tracey #include <limits.h>
 42 a596b957 2022-07-14 tracey #include <netdb.h>
 43 a596b957 2022-07-14 tracey #include <poll.h>
 44 a596b957 2022-07-14 tracey #include <pwd.h>
 45 a596b957 2022-07-14 tracey #include <stddef.h>
 46 a596b957 2022-07-14 tracey #include <stdio.h>
 47 a596b957 2022-07-14 tracey #include <stdlib.h>
 48 a596b957 2022-07-14 tracey #include <string.h>
 49 a596b957 2022-07-14 tracey #include <unistd.h>
 50 a596b957 2022-07-14 tracey #include <util.h>
 51 a596b957 2022-07-14 tracey 
 52 a596b957 2022-07-14 tracey #include "got_error.h"
 53 a596b957 2022-07-14 tracey #include "got_opentemp.h"
 54 df2d3cd2 2023-03-11 op #include "got_reference.h"
 55 b5c757f5 2022-09-01 stsp #include "got_repository.h"
 56 6fe3b58a 2023-11-14 stsp #include "got_privsep.h"
 57 a596b957 2022-07-14 tracey 
 58 a596b957 2022-07-14 tracey #include "gotwebd.h"
 59 ed619ca0 2022-12-14 op #include "tmpl.h"
 60 a596b957 2022-07-14 tracey 
 61 a596b957 2022-07-14 tracey #define SOCKS_BACKLOG 5
 62 a596b957 2022-07-14 tracey #define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))
 63 a596b957 2022-07-14 tracey 
 64 a596b957 2022-07-14 tracey volatile int client_cnt;
 65 a596b957 2022-07-14 tracey 
 66 026ac2c4 2022-08-20 stsp static struct timeval	timeout = { TIMEOUT_DEFAULT, 0 };
 67 a596b957 2022-07-14 tracey 
 68 026ac2c4 2022-08-20 stsp static void	 sockets_sighdlr(int, short, void *);
 69 26678add 2023-11-16 op static void	 sockets_shutdown(void);
 70 026ac2c4 2022-08-20 stsp static void	 sockets_launch(void);
 71 026ac2c4 2022-08-20 stsp static void	 sockets_purge(struct gotwebd *);
 72 026ac2c4 2022-08-20 stsp static void	 sockets_accept_paused(int, short, void *);
 73 026ac2c4 2022-08-20 stsp static void	 sockets_rlimit(int);
 74 a596b957 2022-07-14 tracey 
 75 26678add 2023-11-16 op static void	 sockets_dispatch_main(int, short, void *);
 76 26678add 2023-11-16 op static int	 sockets_unix_socket_listen(struct gotwebd *, struct socket *);
 77 0c64c2f8 2023-11-15 op static int	 sockets_create_socket(struct address *);
 78 026ac2c4 2022-08-20 stsp static int	 sockets_accept_reserve(int, struct sockaddr *, socklen_t *,
 79 026ac2c4 2022-08-20 stsp 		    int, volatile int *);
 80 a596b957 2022-07-14 tracey 
 81 36079424 2024-05-16 op static struct socket *sockets_conf_new_socket(struct gotwebd *,
 82 36079424 2024-05-16 op 		    int, struct address *);
 83 a596b957 2022-07-14 tracey 
 84 a596b957 2022-07-14 tracey int cgi_inflight = 0;
 85 a596b957 2022-07-14 tracey 
 86 a596b957 2022-07-14 tracey void
 87 26678add 2023-11-16 op sockets(struct gotwebd *env, int fd)
 88 a596b957 2022-07-14 tracey {
 89 736fac90 2024-02-10 op 	struct event	 sighup, sigint, sigusr1, sigchld, sigterm;
 90 a596b957 2022-07-14 tracey 
 91 26678add 2023-11-16 op 	event_init();
 92 a596b957 2022-07-14 tracey 
 93 a596b957 2022-07-14 tracey 	sockets_rlimit(-1);
 94 a596b957 2022-07-14 tracey 
 95 26678add 2023-11-16 op 	if (config_init(env) == -1)
 96 26678add 2023-11-16 op 		fatal("failed to initialize configuration");
 97 a596b957 2022-07-14 tracey 
 98 26678add 2023-11-16 op 	if ((env->iev_parent = malloc(sizeof(*env->iev_parent))) == NULL)
 99 26678add 2023-11-16 op 		fatal("malloc");
100 26678add 2023-11-16 op 	imsg_init(&env->iev_parent->ibuf, fd);
101 26678add 2023-11-16 op 	env->iev_parent->handler = sockets_dispatch_main;
102 26678add 2023-11-16 op 	env->iev_parent->data = env->iev_parent;
103 26678add 2023-11-16 op 	event_set(&env->iev_parent->ev, fd, EV_READ, sockets_dispatch_main,
104 26678add 2023-11-16 op 	    env->iev_parent);
105 26678add 2023-11-16 op 	event_add(&env->iev_parent->ev, NULL);
106 8def9425 2023-11-16 op 
107 8def9425 2023-11-16 op 	signal(SIGPIPE, SIG_IGN);
108 26678add 2023-11-16 op 
109 56a9d315 2023-11-18 op 	signal_set(&sighup, SIGHUP, sockets_sighdlr, env);
110 26678add 2023-11-16 op 	signal_add(&sighup, NULL);
111 736fac90 2024-02-10 op 	signal_set(&sigint, SIGINT, sockets_sighdlr, env);
112 736fac90 2024-02-10 op 	signal_add(&sigint, NULL);
113 56a9d315 2023-11-18 op 	signal_set(&sigusr1, SIGUSR1, sockets_sighdlr, env);
114 26678add 2023-11-16 op 	signal_add(&sigusr1, NULL);
115 26678add 2023-11-16 op 	signal_set(&sigchld, SIGCHLD, sockets_sighdlr, env);
116 26678add 2023-11-16 op 	signal_add(&sigchld, NULL);
117 736fac90 2024-02-10 op 	signal_set(&sigterm, SIGTERM, sockets_sighdlr, env);
118 736fac90 2024-02-10 op 	signal_add(&sigterm, NULL);
119 26678add 2023-11-16 op 
120 a596b957 2022-07-14 tracey #ifndef PROFILE
121 63c6b10f 2023-11-14 stsp 	if (pledge("stdio rpath inet recvfd proc exec sendfd unveil",
122 63c6b10f 2023-11-14 stsp 	    NULL) == -1)
123 a596b957 2022-07-14 tracey 		fatal("pledge");
124 a596b957 2022-07-14 tracey #endif
125 26678add 2023-11-16 op 
126 26678add 2023-11-16 op 	event_dispatch();
127 26678add 2023-11-16 op 	sockets_shutdown();
128 a596b957 2022-07-14 tracey }
129 a596b957 2022-07-14 tracey 
130 a596b957 2022-07-14 tracey void
131 a596b957 2022-07-14 tracey sockets_parse_sockets(struct gotwebd *env)
132 a596b957 2022-07-14 tracey {
133 610dd8c9 2022-08-19 stsp 	struct address *a;
134 4fcc9f74 2022-08-16 stsp 	struct socket *new_sock = NULL;
135 610dd8c9 2022-08-19 stsp 	int sock_id = 1;
136 a596b957 2022-07-14 tracey 
137 36079424 2024-05-16 op 	TAILQ_FOREACH(a, &env->addresses, entry) {
138 36079424 2024-05-16 op 		new_sock = sockets_conf_new_socket(env, sock_id, a);
139 36079424 2024-05-16 op 		if (new_sock) {
140 36079424 2024-05-16 op 			sock_id++;
141 36079424 2024-05-16 op 			TAILQ_INSERT_TAIL(&env->sockets,
142 36079424 2024-05-16 op 			    new_sock, entry);
143 610dd8c9 2022-08-19 stsp 		}
144 a596b957 2022-07-14 tracey 	}
145 a596b957 2022-07-14 tracey }
146 a596b957 2022-07-14 tracey 
147 026ac2c4 2022-08-20 stsp static struct socket *
148 36079424 2024-05-16 op sockets_conf_new_socket(struct gotwebd *env, int id, struct address *a)
149 610dd8c9 2022-08-19 stsp {
150 610dd8c9 2022-08-19 stsp 	struct socket *sock;
151 610dd8c9 2022-08-19 stsp 	struct address *acp;
152 a596b957 2022-07-14 tracey 
153 610dd8c9 2022-08-19 stsp 	if ((sock = calloc(1, sizeof(*sock))) == NULL)
154 610dd8c9 2022-08-19 stsp 		fatalx("%s: calloc", __func__);
155 4fcc9f74 2022-08-16 stsp 
156 610dd8c9 2022-08-19 stsp 	sock->conf.id = id;
157 610dd8c9 2022-08-19 stsp 	sock->fd = -1;
158 610dd8c9 2022-08-19 stsp 	sock->conf.af_type = a->ss.ss_family;
159 610dd8c9 2022-08-19 stsp 
160 36079424 2024-05-16 op 	if (a->ss.ss_family == AF_UNIX) {
161 36079424 2024-05-16 op 		struct sockaddr_un *sun;
162 610dd8c9 2022-08-19 stsp 
163 36079424 2024-05-16 op 		sun = (struct sockaddr_un *)&a->ss;
164 36079424 2024-05-16 op 		if (strlcpy(sock->conf.unix_socket_name, sun->sun_path,
165 36079424 2024-05-16 op 		    sizeof(sock->conf.unix_socket_name)) >=
166 36079424 2024-05-16 op 		    sizeof(sock->conf.unix_socket_name))
167 36079424 2024-05-16 op 			fatalx("unix socket path too long: %s", sun->sun_path);
168 4fcc9f74 2022-08-16 stsp 	}
169 4fcc9f74 2022-08-16 stsp 
170 36079424 2024-05-16 op 	sock->conf.fcgi_socket_port = a->port;
171 610dd8c9 2022-08-19 stsp 
172 610dd8c9 2022-08-19 stsp 	acp = &sock->conf.addr;
173 610dd8c9 2022-08-19 stsp 
174 610dd8c9 2022-08-19 stsp 	memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
175 cdfd248a 2023-11-15 op 	acp->slen = a->slen;
176 0c64c2f8 2023-11-15 op 	acp->ai_family = a->ai_family;
177 0c64c2f8 2023-11-15 op 	acp->ai_socktype = a->ai_socktype;
178 0c64c2f8 2023-11-15 op 	acp->ai_protocol = a->ai_protocol;
179 610dd8c9 2022-08-19 stsp 	acp->port = a->port;
180 4448825a 2023-06-16 op 	if (*a->ifname != '\0') {
181 610dd8c9 2022-08-19 stsp 		if (strlcpy(acp->ifname, a->ifname,
182 610dd8c9 2022-08-19 stsp 		    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
183 610dd8c9 2022-08-19 stsp 			fatalx("%s: interface name truncated",
184 610dd8c9 2022-08-19 stsp 			    __func__);
185 610dd8c9 2022-08-19 stsp 		}
186 610dd8c9 2022-08-19 stsp 	}
187 610dd8c9 2022-08-19 stsp 
188 a596b957 2022-07-14 tracey 	return (sock);
189 a596b957 2022-07-14 tracey }
190 a596b957 2022-07-14 tracey 
191 026ac2c4 2022-08-20 stsp static void
192 a596b957 2022-07-14 tracey sockets_launch(void)
193 a596b957 2022-07-14 tracey {
194 a596b957 2022-07-14 tracey 	struct socket *sock;
195 6fe3b58a 2023-11-14 stsp 	struct server *srv;
196 6fe3b58a 2023-11-14 stsp 	const struct got_error *error;
197 a596b957 2022-07-14 tracey 
198 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(sock, &gotwebd_env->sockets, entry) {
199 a596b957 2022-07-14 tracey 		log_debug("%s: configuring socket %d (%d)", __func__,
200 a596b957 2022-07-14 tracey 		    sock->conf.id, sock->fd);
201 a596b957 2022-07-14 tracey 
202 a596b957 2022-07-14 tracey 		event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
203 a596b957 2022-07-14 tracey 		    sockets_socket_accept, sock);
204 a596b957 2022-07-14 tracey 
205 a596b957 2022-07-14 tracey 		if (event_add(&sock->ev, NULL))
206 a596b957 2022-07-14 tracey 			fatalx("event add sock");
207 a596b957 2022-07-14 tracey 
208 a596b957 2022-07-14 tracey 		evtimer_set(&sock->pause, sockets_accept_paused, sock);
209 a596b957 2022-07-14 tracey 
210 a596b957 2022-07-14 tracey 		log_debug("%s: running socket listener %d", __func__,
211 a596b957 2022-07-14 tracey 		    sock->conf.id);
212 a596b957 2022-07-14 tracey 	}
213 6fe3b58a 2023-11-14 stsp 
214 6fe3b58a 2023-11-14 stsp 	TAILQ_FOREACH(srv, &gotwebd_env->servers, entry) {
215 6fe3b58a 2023-11-14 stsp 		if (unveil(srv->repos_path, "r") == -1)
216 6fe3b58a 2023-11-14 stsp 			fatal("unveil %s", srv->repos_path);
217 6fe3b58a 2023-11-14 stsp 	}
218 6fe3b58a 2023-11-14 stsp 
219 6fe3b58a 2023-11-14 stsp 	error = got_privsep_unveil_exec_helpers();
220 6fe3b58a 2023-11-14 stsp 	if (error)
221 6fe3b58a 2023-11-14 stsp 		fatal("%s", error->msg);
222 6fe3b58a 2023-11-14 stsp 
223 6fe3b58a 2023-11-14 stsp 	if (unveil(NULL, NULL) == -1)
224 6fe3b58a 2023-11-14 stsp 		fatal("unveil");
225 a596b957 2022-07-14 tracey }
226 a596b957 2022-07-14 tracey 
227 026ac2c4 2022-08-20 stsp static void
228 a596b957 2022-07-14 tracey sockets_purge(struct gotwebd *env)
229 a596b957 2022-07-14 tracey {
230 a596b957 2022-07-14 tracey 	struct socket *sock, *tsock;
231 a596b957 2022-07-14 tracey 
232 a596b957 2022-07-14 tracey 	/* shutdown and remove sockets */
233 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH_SAFE(sock, &env->sockets, entry, tsock) {
234 a596b957 2022-07-14 tracey 		if (event_initialized(&sock->ev))
235 a596b957 2022-07-14 tracey 			event_del(&sock->ev);
236 a596b957 2022-07-14 tracey 		if (evtimer_initialized(&sock->evt))
237 a596b957 2022-07-14 tracey 			evtimer_del(&sock->evt);
238 a596b957 2022-07-14 tracey 		if (evtimer_initialized(&sock->pause))
239 a596b957 2022-07-14 tracey 			evtimer_del(&sock->pause);
240 a596b957 2022-07-14 tracey 		if (sock->fd != -1)
241 a596b957 2022-07-14 tracey 			close(sock->fd);
242 2ad48e9a 2022-08-16 stsp 		TAILQ_REMOVE(&env->sockets, sock, entry);
243 a596b957 2022-07-14 tracey 	}
244 a596b957 2022-07-14 tracey }
245 a596b957 2022-07-14 tracey 
246 26678add 2023-11-16 op static void
247 26678add 2023-11-16 op sockets_dispatch_main(int fd, short event, void *arg)
248 a596b957 2022-07-14 tracey {
249 26678add 2023-11-16 op 	struct imsgev		*iev = arg;
250 26678add 2023-11-16 op 	struct imsgbuf		*ibuf;
251 26678add 2023-11-16 op 	struct imsg		 imsg;
252 26678add 2023-11-16 op 	struct gotwebd		*env = gotwebd_env;
253 26678add 2023-11-16 op 	ssize_t			 n;
254 26678add 2023-11-16 op 	int			 shut = 0;
255 a596b957 2022-07-14 tracey 
256 26678add 2023-11-16 op 	ibuf = &iev->ibuf;
257 26678add 2023-11-16 op 
258 26678add 2023-11-16 op 	if (event & EV_READ) {
259 26678add 2023-11-16 op 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
260 26678add 2023-11-16 op 			fatal("imsg_read error");
261 26678add 2023-11-16 op 		if (n == 0)	/* Connection closed */
262 26678add 2023-11-16 op 			shut = 1;
263 a596b957 2022-07-14 tracey 	}
264 26678add 2023-11-16 op 	if (event & EV_WRITE) {
265 26678add 2023-11-16 op 		if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
266 26678add 2023-11-16 op 			fatal("msgbuf_write");
267 26678add 2023-11-16 op 		if (n == 0)	/* Connection closed */
268 26678add 2023-11-16 op 			shut = 1;
269 26678add 2023-11-16 op 	}
270 a596b957 2022-07-14 tracey 
271 26678add 2023-11-16 op 	for (;;) {
272 26678add 2023-11-16 op 		if ((n = imsg_get(ibuf, &imsg)) == -1)
273 26678add 2023-11-16 op 			fatal("imsg_get");
274 26678add 2023-11-16 op 		if (n == 0)	/* No more messages. */
275 26678add 2023-11-16 op 			break;
276 26678add 2023-11-16 op 
277 26678add 2023-11-16 op 		switch (imsg.hdr.type) {
278 26678add 2023-11-16 op 		case IMSG_CFG_SRV:
279 26678add 2023-11-16 op 			config_getserver(env, &imsg);
280 26678add 2023-11-16 op 			break;
281 26678add 2023-11-16 op 		case IMSG_CFG_SOCK:
282 26678add 2023-11-16 op 			config_getsock(env, &imsg);
283 26678add 2023-11-16 op 			break;
284 26678add 2023-11-16 op 		case IMSG_CFG_FD:
285 26678add 2023-11-16 op 			config_getfd(env, &imsg);
286 26678add 2023-11-16 op 			break;
287 26678add 2023-11-16 op 		case IMSG_CFG_DONE:
288 26678add 2023-11-16 op 			config_getcfg(env, &imsg);
289 26678add 2023-11-16 op 			break;
290 26678add 2023-11-16 op 		case IMSG_CTL_START:
291 26678add 2023-11-16 op 			sockets_launch();
292 26678add 2023-11-16 op 			break;
293 26678add 2023-11-16 op 		default:
294 26678add 2023-11-16 op 			fatalx("%s: unknown imsg type %d", __func__,
295 26678add 2023-11-16 op 			    imsg.hdr.type);
296 26678add 2023-11-16 op 		}
297 26678add 2023-11-16 op 
298 26678add 2023-11-16 op 		imsg_free(&imsg);
299 a596b957 2022-07-14 tracey 	}
300 a596b957 2022-07-14 tracey 
301 26678add 2023-11-16 op 	if (!shut)
302 26678add 2023-11-16 op 		imsg_event_add(iev);
303 26678add 2023-11-16 op 	else {
304 26678add 2023-11-16 op 		/* This pipe is dead.  Remove its event handler */
305 26678add 2023-11-16 op 		event_del(&iev->ev);
306 26678add 2023-11-16 op 		event_loopexit(NULL);
307 26678add 2023-11-16 op 	}
308 a596b957 2022-07-14 tracey }
309 a596b957 2022-07-14 tracey 
310 026ac2c4 2022-08-20 stsp static void
311 a596b957 2022-07-14 tracey sockets_sighdlr(int sig, short event, void *arg)
312 a596b957 2022-07-14 tracey {
313 a596b957 2022-07-14 tracey 	switch (sig) {
314 a596b957 2022-07-14 tracey 	case SIGHUP:
315 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGHUP", __func__);
316 a596b957 2022-07-14 tracey 		break;
317 a596b957 2022-07-14 tracey 	case SIGPIPE:
318 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGPIPE", __func__);
319 a596b957 2022-07-14 tracey 		break;
320 a596b957 2022-07-14 tracey 	case SIGUSR1:
321 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGUSR1", __func__);
322 a596b957 2022-07-14 tracey 		break;
323 a596b957 2022-07-14 tracey 	case SIGCHLD:
324 736fac90 2024-02-10 op 		break;
325 736fac90 2024-02-10 op 	case SIGINT:
326 736fac90 2024-02-10 op 	case SIGTERM:
327 736fac90 2024-02-10 op 		sockets_shutdown();
328 a596b957 2022-07-14 tracey 		break;
329 a596b957 2022-07-14 tracey 	default:
330 a596b957 2022-07-14 tracey 		log_info("SIGNAL: %d", sig);
331 a596b957 2022-07-14 tracey 		fatalx("unexpected signal");
332 a596b957 2022-07-14 tracey 	}
333 a596b957 2022-07-14 tracey }
334 a596b957 2022-07-14 tracey 
335 26678add 2023-11-16 op static void
336 a596b957 2022-07-14 tracey sockets_shutdown(void)
337 a596b957 2022-07-14 tracey {
338 a596b957 2022-07-14 tracey 	struct server *srv, *tsrv;
339 a596b957 2022-07-14 tracey 	struct socket *sock, *tsock;
340 a596b957 2022-07-14 tracey 
341 a596b957 2022-07-14 tracey 	sockets_purge(gotwebd_env);
342 a596b957 2022-07-14 tracey 
343 a596b957 2022-07-14 tracey 	/* clean sockets */
344 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH_SAFE(sock, &gotwebd_env->sockets, entry, tsock) {
345 2ad48e9a 2022-08-16 stsp 		TAILQ_REMOVE(&gotwebd_env->sockets, sock, entry);
346 a596b957 2022-07-14 tracey 		close(sock->fd);
347 a596b957 2022-07-14 tracey 		free(sock);
348 a596b957 2022-07-14 tracey 	}
349 a596b957 2022-07-14 tracey 
350 a596b957 2022-07-14 tracey 	/* clean servers */
351 1632f50a 2023-11-17 stsp 	TAILQ_FOREACH_SAFE(srv, &gotwebd_env->servers, entry, tsrv)
352 a596b957 2022-07-14 tracey 		free(srv);
353 a596b957 2022-07-14 tracey 
354 a596b957 2022-07-14 tracey 	free(gotwebd_env);
355 736fac90 2024-02-10 op 
356 736fac90 2024-02-10 op 	exit(0);
357 a596b957 2022-07-14 tracey }
358 a596b957 2022-07-14 tracey 
359 a596b957 2022-07-14 tracey int
360 a596b957 2022-07-14 tracey sockets_privinit(struct gotwebd *env, struct socket *sock)
361 a596b957 2022-07-14 tracey {
362 4fcc9f74 2022-08-16 stsp 	if (sock->conf.af_type == AF_UNIX) {
363 a596b957 2022-07-14 tracey 		log_debug("%s: initializing unix socket %s", __func__,
364 a596b957 2022-07-14 tracey 		    sock->conf.unix_socket_name);
365 26678add 2023-11-16 op 		sock->fd = sockets_unix_socket_listen(env, sock);
366 a596b957 2022-07-14 tracey 		if (sock->fd == -1) {
367 a596b957 2022-07-14 tracey 			log_warnx("%s: create unix socket failed", __func__);
368 a596b957 2022-07-14 tracey 			return -1;
369 a596b957 2022-07-14 tracey 		}
370 a596b957 2022-07-14 tracey 	}
371 a596b957 2022-07-14 tracey 
372 4fcc9f74 2022-08-16 stsp 	if (sock->conf.af_type == AF_INET || sock->conf.af_type == AF_INET6) {
373 36079424 2024-05-16 op 		log_debug("%s: initializing %s FCGI socket on port %d",
374 4fcc9f74 2022-08-16 stsp 		    __func__, sock->conf.af_type == AF_INET ? "inet" : "inet6",
375 36079424 2024-05-16 op 		    sock->conf.fcgi_socket_port);
376 0c64c2f8 2023-11-15 op 		sock->fd = sockets_create_socket(&sock->conf.addr);
377 a596b957 2022-07-14 tracey 		if (sock->fd == -1) {
378 610dd8c9 2022-08-19 stsp 			log_warnx("%s: create FCGI socket failed", __func__);
379 a596b957 2022-07-14 tracey 			return -1;
380 a596b957 2022-07-14 tracey 		}
381 a596b957 2022-07-14 tracey 	}
382 a596b957 2022-07-14 tracey 
383 a596b957 2022-07-14 tracey 	return 0;
384 a596b957 2022-07-14 tracey }
385 a596b957 2022-07-14 tracey 
386 026ac2c4 2022-08-20 stsp static int
387 26678add 2023-11-16 op sockets_unix_socket_listen(struct gotwebd *env, struct socket *sock)
388 a596b957 2022-07-14 tracey {
389 a596b957 2022-07-14 tracey 	int u_fd = -1;
390 a596b957 2022-07-14 tracey 	mode_t old_umask, mode;
391 a596b957 2022-07-14 tracey 
392 a596b957 2022-07-14 tracey 	u_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
393 a596b957 2022-07-14 tracey 	if (u_fd == -1) {
394 a596b957 2022-07-14 tracey 		log_warn("%s: socket", __func__);
395 a596b957 2022-07-14 tracey 		return -1;
396 a596b957 2022-07-14 tracey 	}
397 a596b957 2022-07-14 tracey 
398 a596b957 2022-07-14 tracey 	if (unlink(sock->conf.unix_socket_name) == -1) {
399 a596b957 2022-07-14 tracey 		if (errno != ENOENT) {
400 a596b957 2022-07-14 tracey 			log_warn("%s: unlink %s", __func__,
401 a596b957 2022-07-14 tracey 			    sock->conf.unix_socket_name);
402 a596b957 2022-07-14 tracey 			close(u_fd);
403 a596b957 2022-07-14 tracey 			return -1;
404 a596b957 2022-07-14 tracey 		}
405 a596b957 2022-07-14 tracey 	}
406 a596b957 2022-07-14 tracey 
407 a596b957 2022-07-14 tracey 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
408 a596b957 2022-07-14 tracey 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
409 a596b957 2022-07-14 tracey 
410 36079424 2024-05-16 op 	if (bind(u_fd, (struct sockaddr *)&sock->conf.addr.ss,
411 36079424 2024-05-16 op 	    sock->conf.addr.slen) == -1) {
412 a596b957 2022-07-14 tracey 		log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
413 a596b957 2022-07-14 tracey 		close(u_fd);
414 a596b957 2022-07-14 tracey 		(void)umask(old_umask);
415 a596b957 2022-07-14 tracey 		return -1;
416 a596b957 2022-07-14 tracey 	}
417 a596b957 2022-07-14 tracey 
418 a596b957 2022-07-14 tracey 	(void)umask(old_umask);
419 a596b957 2022-07-14 tracey 
420 a596b957 2022-07-14 tracey 	if (chmod(sock->conf.unix_socket_name, mode) == -1) {
421 a596b957 2022-07-14 tracey 		log_warn("%s: chmod", __func__);
422 a596b957 2022-07-14 tracey 		close(u_fd);
423 a596b957 2022-07-14 tracey 		(void)unlink(sock->conf.unix_socket_name);
424 a596b957 2022-07-14 tracey 		return -1;
425 a596b957 2022-07-14 tracey 	}
426 a596b957 2022-07-14 tracey 
427 26678add 2023-11-16 op 	if (chown(sock->conf.unix_socket_name, env->pw->pw_uid,
428 26678add 2023-11-16 op 	    env->pw->pw_gid) == -1) {
429 a596b957 2022-07-14 tracey 		log_warn("%s: chown", __func__);
430 a596b957 2022-07-14 tracey 		close(u_fd);
431 a596b957 2022-07-14 tracey 		(void)unlink(sock->conf.unix_socket_name);
432 a596b957 2022-07-14 tracey 		return -1;
433 a596b957 2022-07-14 tracey 	}
434 a596b957 2022-07-14 tracey 
435 a596b957 2022-07-14 tracey 	if (listen(u_fd, SOCKS_BACKLOG) == -1) {
436 a596b957 2022-07-14 tracey 		log_warn("%s: listen", __func__);
437 a596b957 2022-07-14 tracey 		return -1;
438 a596b957 2022-07-14 tracey 	}
439 a596b957 2022-07-14 tracey 
440 a596b957 2022-07-14 tracey 	return u_fd;
441 a596b957 2022-07-14 tracey }
442 a596b957 2022-07-14 tracey 
443 026ac2c4 2022-08-20 stsp static int
444 0c64c2f8 2023-11-15 op sockets_create_socket(struct address *a)
445 a596b957 2022-07-14 tracey {
446 a596b957 2022-07-14 tracey 	int fd = -1, o_val = 1, flags;
447 a596b957 2022-07-14 tracey 
448 0c64c2f8 2023-11-15 op 	fd = socket(a->ai_family, a->ai_socktype, a->ai_protocol);
449 610dd8c9 2022-08-19 stsp 	if (fd == -1)
450 610dd8c9 2022-08-19 stsp 		return -1;
451 a596b957 2022-07-14 tracey 
452 610dd8c9 2022-08-19 stsp 	log_debug("%s: opened socket (%d) for %s", __func__,
453 610dd8c9 2022-08-19 stsp 	    fd, a->ifname);
454 a596b957 2022-07-14 tracey 
455 610dd8c9 2022-08-19 stsp 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
456 610dd8c9 2022-08-19 stsp 	    sizeof(int)) == -1) {
457 610dd8c9 2022-08-19 stsp 		log_warn("%s: setsockopt error", __func__);
458 610dd8c9 2022-08-19 stsp 		close(fd);
459 610dd8c9 2022-08-19 stsp 		return -1;
460 610dd8c9 2022-08-19 stsp 	}
461 a596b957 2022-07-14 tracey 
462 610dd8c9 2022-08-19 stsp 	/* non-blocking */
463 610dd8c9 2022-08-19 stsp 	flags = fcntl(fd, F_GETFL);
464 610dd8c9 2022-08-19 stsp 	flags |= O_NONBLOCK;
465 610dd8c9 2022-08-19 stsp 	if (fcntl(fd, F_SETFL, flags) == -1) {
466 610dd8c9 2022-08-19 stsp 		log_info("%s: could not enable non-blocking I/O", __func__);
467 610dd8c9 2022-08-19 stsp 		close(fd);
468 610dd8c9 2022-08-19 stsp 		return -1;
469 610dd8c9 2022-08-19 stsp 	}
470 a596b957 2022-07-14 tracey 
471 cdfd248a 2023-11-15 op 	if (bind(fd, (struct sockaddr *)&a->ss, a->slen) == -1) {
472 610dd8c9 2022-08-19 stsp 		close(fd);
473 0c64c2f8 2023-11-15 op 		log_info("%s: can't bind to port %d", __func__, a->port);
474 610dd8c9 2022-08-19 stsp 		return -1;
475 a596b957 2022-07-14 tracey 	}
476 a596b957 2022-07-14 tracey 
477 610dd8c9 2022-08-19 stsp 	if (listen(fd, SOMAXCONN) == -1) {
478 610dd8c9 2022-08-19 stsp 		log_warn("%s, unable to listen on socket", __func__);
479 610dd8c9 2022-08-19 stsp 		close(fd);
480 610dd8c9 2022-08-19 stsp 		return -1;
481 610dd8c9 2022-08-19 stsp 	}
482 610dd8c9 2022-08-19 stsp 
483 a596b957 2022-07-14 tracey 	return (fd);
484 a596b957 2022-07-14 tracey }
485 a596b957 2022-07-14 tracey 
486 026ac2c4 2022-08-20 stsp static int
487 a596b957 2022-07-14 tracey sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
488 a596b957 2022-07-14 tracey     int reserve, volatile int *counter)
489 a596b957 2022-07-14 tracey {
490 a596b957 2022-07-14 tracey 	int ret;
491 a596b957 2022-07-14 tracey 
492 a596b957 2022-07-14 tracey 	if (getdtablecount() + reserve +
493 a596b957 2022-07-14 tracey 	    ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
494 a596b957 2022-07-14 tracey 		log_debug("inflight fds exceeded");
495 a596b957 2022-07-14 tracey 		errno = EMFILE;
496 a596b957 2022-07-14 tracey 		return -1;
497 a596b957 2022-07-14 tracey 	}
498 a596b957 2022-07-14 tracey 
499 a596b957 2022-07-14 tracey 	if ((ret = accept4(sockfd, addr, addrlen,
500 a596b957 2022-07-14 tracey 	    SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
501 a596b957 2022-07-14 tracey 		(*counter)++;
502 a596b957 2022-07-14 tracey 		log_debug("inflight incremented, now %d", *counter);
503 a596b957 2022-07-14 tracey 	}
504 a596b957 2022-07-14 tracey 
505 a596b957 2022-07-14 tracey 	return ret;
506 a596b957 2022-07-14 tracey }
507 a596b957 2022-07-14 tracey 
508 026ac2c4 2022-08-20 stsp static void
509 a596b957 2022-07-14 tracey sockets_accept_paused(int fd, short events, void *arg)
510 a596b957 2022-07-14 tracey {
511 a596b957 2022-07-14 tracey 	struct socket *sock = (struct socket *)arg;
512 a596b957 2022-07-14 tracey 
513 a596b957 2022-07-14 tracey 	event_add(&sock->ev, NULL);
514 a596b957 2022-07-14 tracey }
515 a596b957 2022-07-14 tracey 
516 a596b957 2022-07-14 tracey void
517 a596b957 2022-07-14 tracey sockets_socket_accept(int fd, short event, void *arg)
518 a596b957 2022-07-14 tracey {
519 a596b957 2022-07-14 tracey 	struct socket *sock = (struct socket *)arg;
520 a596b957 2022-07-14 tracey 	struct sockaddr_storage ss;
521 a596b957 2022-07-14 tracey 	struct timeval backoff;
522 a596b957 2022-07-14 tracey 	struct request *c = NULL;
523 a596b957 2022-07-14 tracey 	socklen_t len;
524 a596b957 2022-07-14 tracey 	int s;
525 a596b957 2022-07-14 tracey 
526 a596b957 2022-07-14 tracey 	backoff.tv_sec = 1;
527 a596b957 2022-07-14 tracey 	backoff.tv_usec = 0;
528 a596b957 2022-07-14 tracey 
529 a596b957 2022-07-14 tracey 	event_add(&sock->ev, NULL);
530 a596b957 2022-07-14 tracey 	if (event & EV_TIMEOUT)
531 a596b957 2022-07-14 tracey 		return;
532 a596b957 2022-07-14 tracey 
533 a596b957 2022-07-14 tracey 	len = sizeof(ss);
534 a596b957 2022-07-14 tracey 
535 a596b957 2022-07-14 tracey 	s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
536 a596b957 2022-07-14 tracey 	    FD_RESERVE, &cgi_inflight);
537 a596b957 2022-07-14 tracey 
538 a596b957 2022-07-14 tracey 	if (s == -1) {
539 a596b957 2022-07-14 tracey 		switch (errno) {
540 a596b957 2022-07-14 tracey 		case EINTR:
541 a596b957 2022-07-14 tracey 		case EWOULDBLOCK:
542 a596b957 2022-07-14 tracey 		case ECONNABORTED:
543 a596b957 2022-07-14 tracey 			return;
544 a596b957 2022-07-14 tracey 		case EMFILE:
545 a596b957 2022-07-14 tracey 		case ENFILE:
546 a596b957 2022-07-14 tracey 			event_del(&sock->ev);
547 a596b957 2022-07-14 tracey 			evtimer_add(&sock->pause, &backoff);
548 a596b957 2022-07-14 tracey 			return;
549 a596b957 2022-07-14 tracey 		default:
550 a596b957 2022-07-14 tracey 			log_warn("%s: accept", __func__);
551 a596b957 2022-07-14 tracey 		}
552 a596b957 2022-07-14 tracey 	}
553 a596b957 2022-07-14 tracey 
554 a596b957 2022-07-14 tracey 	if (client_cnt > GOTWEBD_MAXCLIENTS)
555 a596b957 2022-07-14 tracey 		goto err;
556 a596b957 2022-07-14 tracey 
557 a596b957 2022-07-14 tracey 	c = calloc(1, sizeof(struct request));
558 a596b957 2022-07-14 tracey 	if (c == NULL) {
559 ed619ca0 2022-12-14 op 		log_warn("%s", __func__);
560 ed619ca0 2022-12-14 op 		close(s);
561 ed619ca0 2022-12-14 op 		cgi_inflight--;
562 ed619ca0 2022-12-14 op 		return;
563 ed619ca0 2022-12-14 op 	}
564 ed619ca0 2022-12-14 op 
565 62eab86e 2023-09-13 op 	c->tp = template(c, &fcgi_write, c->outbuf, sizeof(c->outbuf));
566 ed619ca0 2022-12-14 op 	if (c->tp == NULL) {
567 a596b957 2022-07-14 tracey 		log_warn("%s", __func__);
568 a596b957 2022-07-14 tracey 		close(s);
569 a596b957 2022-07-14 tracey 		cgi_inflight--;
570 ed619ca0 2022-12-14 op 		free(c);
571 a596b957 2022-07-14 tracey 		return;
572 a596b957 2022-07-14 tracey 	}
573 a596b957 2022-07-14 tracey 
574 a596b957 2022-07-14 tracey 	c->fd = s;
575 a596b957 2022-07-14 tracey 	c->sock = sock;
576 a596b957 2022-07-14 tracey 	memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
577 a596b957 2022-07-14 tracey 	c->buf_pos = 0;
578 a596b957 2022-07-14 tracey 	c->buf_len = 0;
579 a596b957 2022-07-14 tracey 	c->request_started = 0;
580 a596b957 2022-07-14 tracey 	c->sock->client_status = CLIENT_CONNECT;
581 a596b957 2022-07-14 tracey 
582 5add7f42 2023-03-10 op 	event_set(&c->ev, s, EV_READ|EV_PERSIST, fcgi_request, c);
583 a596b957 2022-07-14 tracey 	event_add(&c->ev, NULL);
584 a596b957 2022-07-14 tracey 
585 a596b957 2022-07-14 tracey 	evtimer_set(&c->tmo, fcgi_timeout, c);
586 a596b957 2022-07-14 tracey 	evtimer_add(&c->tmo, &timeout);
587 a596b957 2022-07-14 tracey 
588 a596b957 2022-07-14 tracey 	client_cnt++;
589 a596b957 2022-07-14 tracey 
590 a596b957 2022-07-14 tracey 	return;
591 a596b957 2022-07-14 tracey err:
592 a596b957 2022-07-14 tracey 	cgi_inflight--;
593 a596b957 2022-07-14 tracey 	close(s);
594 a596b957 2022-07-14 tracey 	if (c != NULL)
595 a596b957 2022-07-14 tracey 		free(c);
596 a596b957 2022-07-14 tracey }
597 a596b957 2022-07-14 tracey 
598 026ac2c4 2022-08-20 stsp static void
599 a596b957 2022-07-14 tracey sockets_rlimit(int maxfd)
600 a596b957 2022-07-14 tracey {
601 a596b957 2022-07-14 tracey 	struct rlimit rl;
602 a596b957 2022-07-14 tracey 
603 a596b957 2022-07-14 tracey 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
604 a596b957 2022-07-14 tracey 		fatal("%s: failed to get resource limit", __func__);
605 d6267a62 2022-07-17 naddy 	log_debug("%s: max open files %llu", __func__,
606 d6267a62 2022-07-17 naddy 	    (unsigned long long)rl.rlim_max);
607 a596b957 2022-07-14 tracey 
608 a596b957 2022-07-14 tracey 	/*
609 a596b957 2022-07-14 tracey 	 * Allow the maximum number of open file descriptors for this
610 a596b957 2022-07-14 tracey 	 * login class (which should be the class "daemon" by default).
611 a596b957 2022-07-14 tracey 	 */
612 a596b957 2022-07-14 tracey 	if (maxfd == -1)
613 a596b957 2022-07-14 tracey 		rl.rlim_cur = rl.rlim_max;
614 a596b957 2022-07-14 tracey 	else
615 a596b957 2022-07-14 tracey 		rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
616 a596b957 2022-07-14 tracey 	if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
617 a596b957 2022-07-14 tracey 		fatal("%s: failed to set resource limit", __func__);
618 d6267a62 2022-07-17 naddy }