2 8a35f56c 2022-07-16 thomas * Copyright (c) 2016, 2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
3 8a35f56c 2022-07-16 thomas * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
4 8a35f56c 2022-07-16 thomas * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
5 8a35f56c 2022-07-16 thomas * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
7 8a35f56c 2022-07-16 thomas * Permission to use, copy, modify, and distribute this software for any
8 8a35f56c 2022-07-16 thomas * purpose with or without fee is hereby granted, provided that the above
9 8a35f56c 2022-07-16 thomas * copyright notice and this permission notice appear in all copies.
11 8a35f56c 2022-07-16 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 8a35f56c 2022-07-16 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 8a35f56c 2022-07-16 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 8a35f56c 2022-07-16 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 8a35f56c 2022-07-16 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 8a35f56c 2022-07-16 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 8a35f56c 2022-07-16 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 8a35f56c 2022-07-16 thomas #include <sys/param.h>
21 8a35f56c 2022-07-16 thomas #include <sys/ioctl.h>
22 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
23 8a35f56c 2022-07-16 thomas #include <sys/wait.h>
24 8a35f56c 2022-07-16 thomas #include <sys/uio.h>
25 8a35f56c 2022-07-16 thomas #include <sys/resource.h>
26 8a35f56c 2022-07-16 thomas #include <sys/socket.h>
27 8a35f56c 2022-07-16 thomas #include <sys/stat.h>
28 8a35f56c 2022-07-16 thomas #include <sys/time.h>
29 8a35f56c 2022-07-16 thomas #include <sys/types.h>
30 8a35f56c 2022-07-16 thomas #include <sys/mman.h>
31 8a35f56c 2022-07-16 thomas #include <sys/un.h>
33 8a35f56c 2022-07-16 thomas #include <net/if.h>
34 8a35f56c 2022-07-16 thomas #include <netinet/in.h>
36 8a35f56c 2022-07-16 thomas #include <errno.h>
37 8a35f56c 2022-07-16 thomas #include <event.h>
38 8a35f56c 2022-07-16 thomas #include <fcntl.h>
39 8a35f56c 2022-07-16 thomas #include <ifaddrs.h>
40 8a35f56c 2022-07-16 thomas #include <limits.h>
41 8a35f56c 2022-07-16 thomas #include <netdb.h>
42 8a35f56c 2022-07-16 thomas #include <poll.h>
43 8a35f56c 2022-07-16 thomas #include <pwd.h>
44 8a35f56c 2022-07-16 thomas #include <stddef.h>
45 8a35f56c 2022-07-16 thomas #include <stdio.h>
46 8a35f56c 2022-07-16 thomas #include <stdlib.h>
47 8a35f56c 2022-07-16 thomas #include <string.h>
48 8a35f56c 2022-07-16 thomas #include <unistd.h>
50 8a35f56c 2022-07-16 thomas #include "got_error.h"
51 8a35f56c 2022-07-16 thomas #include "got_opentemp.h"
52 55e6cffd 2022-09-01 thomas #include "got_repository.h"
54 8a35f56c 2022-07-16 thomas #include "proc.h"
55 8a35f56c 2022-07-16 thomas #include "gotwebd.h"
57 ff36aeea 2022-07-16 thomas #include "got_compat.h"
59 8a35f56c 2022-07-16 thomas #define SOCKS_BACKLOG 5
60 8a35f56c 2022-07-16 thomas #define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
63 8a35f56c 2022-07-16 thomas volatile int client_cnt;
65 1f6ec068 2022-08-27 thomas static struct timeval timeout = { TIMEOUT_DEFAULT, 0 };
67 1f6ec068 2022-08-27 thomas static void sockets_sighdlr(int, short, void *);
68 1f6ec068 2022-08-27 thomas static void sockets_run(struct privsep *, struct privsep_proc *, void *);
69 1f6ec068 2022-08-27 thomas static void sockets_launch(void);
70 1f6ec068 2022-08-27 thomas static void sockets_purge(struct gotwebd *);
71 1f6ec068 2022-08-27 thomas static void sockets_accept_paused(int, short, void *);
72 1f6ec068 2022-08-27 thomas static void sockets_rlimit(int);
74 1f6ec068 2022-08-27 thomas static int sockets_dispatch_gotwebd(int, struct privsep_proc *,
75 1f6ec068 2022-08-27 thomas struct imsg *);
76 1f6ec068 2022-08-27 thomas static int sockets_unix_socket_listen(struct privsep *, struct socket *);
77 1f6ec068 2022-08-27 thomas static int sockets_create_socket(struct address *, in_port_t);
78 1f6ec068 2022-08-27 thomas static int sockets_accept_reserve(int, struct sockaddr *, socklen_t *,
79 1f6ec068 2022-08-27 thomas int, volatile int *);
81 1f6ec068 2022-08-27 thomas static struct socket *sockets_conf_new_socket_unix(struct gotwebd *,
82 1f6ec068 2022-08-27 thomas struct server *, int);
83 1f6ec068 2022-08-27 thomas static struct socket *sockets_conf_new_socket_fcgi(struct gotwebd *,
84 1f6ec068 2022-08-27 thomas struct server *, int, struct address *);
86 8a35f56c 2022-07-16 thomas int cgi_inflight = 0;
88 8a35f56c 2022-07-16 thomas static struct privsep_proc procs[] = {
89 8a35f56c 2022-07-16 thomas { "gotwebd", PROC_GOTWEBD, sockets_dispatch_gotwebd },
93 8a35f56c 2022-07-16 thomas sockets(struct privsep *ps, struct privsep_proc *p)
95 8a35f56c 2022-07-16 thomas proc_run(ps, p, procs, nitems(procs), sockets_run, NULL);
98 1f6ec068 2022-08-27 thomas static void
99 8a35f56c 2022-07-16 thomas sockets_run(struct privsep *ps, struct privsep_proc *p, void *arg)
101 8a35f56c 2022-07-16 thomas if (config_init(ps->ps_env) == -1)
102 8a35f56c 2022-07-16 thomas fatal("failed to initialize configuration");
104 8a35f56c 2022-07-16 thomas p->p_shutdown = sockets_shutdown;
106 8a35f56c 2022-07-16 thomas sockets_rlimit(-1);
108 8a35f56c 2022-07-16 thomas signal_del(&ps->ps_evsigchld);
109 8a35f56c 2022-07-16 thomas signal_set(&ps->ps_evsigchld, SIGCHLD, sockets_sighdlr, ps);
110 8a35f56c 2022-07-16 thomas signal_add(&ps->ps_evsigchld, NULL);
112 8a35f56c 2022-07-16 thomas #ifndef PROFILE
113 8a35f56c 2022-07-16 thomas if (pledge("stdio rpath wpath cpath inet recvfd proc exec sendfd",
114 8a35f56c 2022-07-16 thomas NULL) == -1)
115 8a35f56c 2022-07-16 thomas fatal("pledge");
120 8a35f56c 2022-07-16 thomas sockets_parse_sockets(struct gotwebd *env)
122 8a35f56c 2022-07-16 thomas struct server *srv;
123 9d7714e3 2022-08-27 thomas struct address *a;
124 720c2b05 2022-08-16 thomas struct socket *new_sock = NULL;
125 9d7714e3 2022-08-27 thomas int sock_id = 1;
127 90d63d47 2022-08-16 thomas TAILQ_FOREACH(srv, &env->servers, entry) {
128 8a35f56c 2022-07-16 thomas if (srv->unix_socket) {
129 9d7714e3 2022-08-27 thomas new_sock = sockets_conf_new_socket_unix(env, srv,
130 9d7714e3 2022-08-27 thomas sock_id);
131 720c2b05 2022-08-16 thomas if (new_sock) {
132 9d7714e3 2022-08-27 thomas sock_id++;
133 720c2b05 2022-08-16 thomas TAILQ_INSERT_TAIL(&env->sockets, new_sock,
138 9d7714e3 2022-08-27 thomas if (srv->fcgi_socket) {
139 9d7714e3 2022-08-27 thomas if (TAILQ_EMPTY(&srv->al)) {
140 9d7714e3 2022-08-27 thomas fatalx("%s: server %s has no IP addresses to "
141 9d7714e3 2022-08-27 thomas "listen for FCGI connections", __func__,
142 9d7714e3 2022-08-27 thomas srv->name);
144 9d7714e3 2022-08-27 thomas TAILQ_FOREACH(a, &srv->al, entry) {
145 9d7714e3 2022-08-27 thomas if (a->ss.ss_family != AF_INET &&
146 9d7714e3 2022-08-27 thomas a->ss.ss_family != AF_INET6)
147 9d7714e3 2022-08-27 thomas continue;
148 9d7714e3 2022-08-27 thomas new_sock = sockets_conf_new_socket_fcgi(env,
149 9d7714e3 2022-08-27 thomas srv, sock_id, a);
150 9d7714e3 2022-08-27 thomas if (new_sock) {
151 9d7714e3 2022-08-27 thomas sock_id++;
152 9d7714e3 2022-08-27 thomas TAILQ_INSERT_TAIL(&env->sockets,
153 9d7714e3 2022-08-27 thomas new_sock, entry);
160 1f6ec068 2022-08-27 thomas static struct socket *
161 9d7714e3 2022-08-27 thomas sockets_conf_new_socket_unix(struct gotwebd *env, struct server *srv, int id)
163 8a35f56c 2022-07-16 thomas struct socket *sock;
166 8a35f56c 2022-07-16 thomas if ((sock = calloc(1, sizeof(*sock))) == NULL)
167 8a35f56c 2022-07-16 thomas fatalx("%s: calloc", __func__);
169 8a35f56c 2022-07-16 thomas sock->conf.id = id;
170 8a35f56c 2022-07-16 thomas sock->fd = -1;
171 9d7714e3 2022-08-27 thomas sock->conf.af_type = AF_UNIX;
173 9d7714e3 2022-08-27 thomas if (strlcpy(sock->conf.unix_socket_name,
174 9d7714e3 2022-08-27 thomas srv->unix_socket_name,
175 9d7714e3 2022-08-27 thomas sizeof(sock->conf.unix_socket_name)) >=
176 9d7714e3 2022-08-27 thomas sizeof(sock->conf.unix_socket_name)) {
177 9d7714e3 2022-08-27 thomas free(sock);
178 9d7714e3 2022-08-27 thomas fatalx("%s: strlcpy", __func__);
181 8a35f56c 2022-07-16 thomas n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
182 8a35f56c 2022-07-16 thomas srv->name);
183 717a78d4 2022-08-16 thomas if (n < 0 || (size_t)n >= GOTWEBD_MAXTEXT) {
184 8a35f56c 2022-07-16 thomas free(sock);
185 8a35f56c 2022-07-16 thomas fatalx("%s: snprintf", __func__);
188 8a35f56c 2022-07-16 thomas if (strlcpy(sock->conf.srv_name, srv->name,
189 8a35f56c 2022-07-16 thomas sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
190 8a35f56c 2022-07-16 thomas free(sock);
191 8a35f56c 2022-07-16 thomas fatalx("%s: strlcpy", __func__);
194 9d7714e3 2022-08-27 thomas return sock;
197 1f6ec068 2022-08-27 thomas static struct socket *
198 9d7714e3 2022-08-27 thomas sockets_conf_new_socket_fcgi(struct gotwebd *env, struct server *srv, int id,
199 9d7714e3 2022-08-27 thomas struct address *a)
201 9d7714e3 2022-08-27 thomas struct socket *sock;
202 9d7714e3 2022-08-27 thomas struct address *acp;
205 9d7714e3 2022-08-27 thomas if ((sock = calloc(1, sizeof(*sock))) == NULL)
206 9d7714e3 2022-08-27 thomas fatalx("%s: calloc", __func__);
208 9d7714e3 2022-08-27 thomas sock->conf.id = id;
209 9d7714e3 2022-08-27 thomas sock->fd = -1;
210 9d7714e3 2022-08-27 thomas sock->conf.af_type = a->ss.ss_family;
212 e4c7e0b0 2022-08-30 thomas sock->conf.fcgi_socket_port = a->port;
214 9d7714e3 2022-08-27 thomas n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
215 9d7714e3 2022-08-27 thomas srv->name);
216 9d7714e3 2022-08-27 thomas if (n < 0 || (size_t)n >= GOTWEBD_MAXTEXT) {
217 720c2b05 2022-08-16 thomas free(sock);
218 9d7714e3 2022-08-27 thomas fatalx("%s: snprintf", __func__);
221 9d7714e3 2022-08-27 thomas if (strlcpy(sock->conf.srv_name, srv->name,
222 9d7714e3 2022-08-27 thomas sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
223 9d7714e3 2022-08-27 thomas free(sock);
224 9d7714e3 2022-08-27 thomas fatalx("%s: strlcpy", __func__);
227 9d7714e3 2022-08-27 thomas acp = &sock->conf.addr;
229 9d7714e3 2022-08-27 thomas memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
230 9d7714e3 2022-08-27 thomas acp->ipproto = a->ipproto;
231 9d7714e3 2022-08-27 thomas acp->prefixlen = a->prefixlen;
232 9d7714e3 2022-08-27 thomas acp->port = a->port;
233 9d7714e3 2022-08-27 thomas if (strlen(a->ifname) != 0) {
234 9d7714e3 2022-08-27 thomas if (strlcpy(acp->ifname, a->ifname,
235 9d7714e3 2022-08-27 thomas sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
236 9d7714e3 2022-08-27 thomas fatalx("%s: interface name truncated",
237 9d7714e3 2022-08-27 thomas __func__);
241 8a35f56c 2022-07-16 thomas return (sock);
244 1f6ec068 2022-08-27 thomas static void
245 8a35f56c 2022-07-16 thomas sockets_launch(void)
247 8a35f56c 2022-07-16 thomas struct socket *sock;
249 90d63d47 2022-08-16 thomas TAILQ_FOREACH(sock, &gotwebd_env->sockets, entry) {
250 8a35f56c 2022-07-16 thomas log_debug("%s: configuring socket %d (%d)", __func__,
251 8a35f56c 2022-07-16 thomas sock->conf.id, sock->fd);
253 8a35f56c 2022-07-16 thomas event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
254 8a35f56c 2022-07-16 thomas sockets_socket_accept, sock);
256 8a35f56c 2022-07-16 thomas if (event_add(&sock->ev, NULL))
257 8a35f56c 2022-07-16 thomas fatalx("event add sock");
259 8a35f56c 2022-07-16 thomas evtimer_set(&sock->pause, sockets_accept_paused, sock);
261 8a35f56c 2022-07-16 thomas log_debug("%s: running socket listener %d", __func__,
262 8a35f56c 2022-07-16 thomas sock->conf.id);
266 1f6ec068 2022-08-27 thomas static void
267 8a35f56c 2022-07-16 thomas sockets_purge(struct gotwebd *env)
269 8a35f56c 2022-07-16 thomas struct socket *sock, *tsock;
271 8a35f56c 2022-07-16 thomas /* shutdown and remove sockets */
272 90d63d47 2022-08-16 thomas TAILQ_FOREACH_SAFE(sock, &env->sockets, entry, tsock) {
273 8a35f56c 2022-07-16 thomas if (event_initialized(&sock->ev))
274 8a35f56c 2022-07-16 thomas event_del(&sock->ev);
275 8a35f56c 2022-07-16 thomas if (evtimer_initialized(&sock->evt))
276 8a35f56c 2022-07-16 thomas evtimer_del(&sock->evt);
277 8a35f56c 2022-07-16 thomas if (evtimer_initialized(&sock->pause))
278 8a35f56c 2022-07-16 thomas evtimer_del(&sock->pause);
279 8a35f56c 2022-07-16 thomas if (sock->fd != -1)
280 8a35f56c 2022-07-16 thomas close(sock->fd);
281 90d63d47 2022-08-16 thomas TAILQ_REMOVE(&env->sockets, sock, entry);
285 1f6ec068 2022-08-27 thomas static int
286 8a35f56c 2022-07-16 thomas sockets_dispatch_gotwebd(int fd, struct privsep_proc *p, struct imsg *imsg)
288 8a35f56c 2022-07-16 thomas struct privsep *ps = p->p_ps;
289 8a35f56c 2022-07-16 thomas int res = 0, cmd = 0, verbose;
291 8a35f56c 2022-07-16 thomas switch (imsg->hdr.type) {
292 8a35f56c 2022-07-16 thomas case IMSG_CFG_SRV:
293 8a35f56c 2022-07-16 thomas config_getserver(gotwebd_env, imsg);
295 8a35f56c 2022-07-16 thomas case IMSG_CFG_SOCK:
296 8a35f56c 2022-07-16 thomas config_getsock(gotwebd_env, imsg);
298 8a35f56c 2022-07-16 thomas case IMSG_CFG_FD:
299 8a35f56c 2022-07-16 thomas config_getfd(gotwebd_env, imsg);
301 8a35f56c 2022-07-16 thomas case IMSG_CFG_DONE:
302 8a35f56c 2022-07-16 thomas config_getcfg(gotwebd_env, imsg);
304 8a35f56c 2022-07-16 thomas case IMSG_CTL_START:
305 8a35f56c 2022-07-16 thomas sockets_launch();
307 8a35f56c 2022-07-16 thomas case IMSG_CTL_VERBOSE:
308 8a35f56c 2022-07-16 thomas IMSG_SIZE_CHECK(imsg, &verbose);
309 8a35f56c 2022-07-16 thomas memcpy(&verbose, imsg->data, sizeof(verbose));
310 8a35f56c 2022-07-16 thomas log_setverbose(verbose);
313 8a35f56c 2022-07-16 thomas return -1;
316 8a35f56c 2022-07-16 thomas switch (cmd) {
320 8a35f56c 2022-07-16 thomas if (proc_compose_imsg(ps, PROC_GOTWEBD, -1, cmd,
321 8a35f56c 2022-07-16 thomas imsg->hdr.peerid, -1, &res, sizeof(res)) == -1)
322 8a35f56c 2022-07-16 thomas return -1;
326 8a35f56c 2022-07-16 thomas return 0;
329 1f6ec068 2022-08-27 thomas static void
330 8a35f56c 2022-07-16 thomas sockets_sighdlr(int sig, short event, void *arg)
332 8a35f56c 2022-07-16 thomas switch (sig) {
333 8a35f56c 2022-07-16 thomas case SIGHUP:
334 8a35f56c 2022-07-16 thomas log_info("%s: ignoring SIGHUP", __func__);
336 8a35f56c 2022-07-16 thomas case SIGPIPE:
337 8a35f56c 2022-07-16 thomas log_info("%s: ignoring SIGPIPE", __func__);
339 8a35f56c 2022-07-16 thomas case SIGUSR1:
340 8a35f56c 2022-07-16 thomas log_info("%s: ignoring SIGUSR1", __func__);
342 8a35f56c 2022-07-16 thomas case SIGCHLD:
345 8a35f56c 2022-07-16 thomas log_info("SIGNAL: %d", sig);
346 8a35f56c 2022-07-16 thomas fatalx("unexpected signal");
351 8a35f56c 2022-07-16 thomas sockets_shutdown(void)
353 8a35f56c 2022-07-16 thomas struct server *srv, *tsrv;
354 8a35f56c 2022-07-16 thomas struct socket *sock, *tsock;
357 8a35f56c 2022-07-16 thomas sockets_purge(gotwebd_env);
359 8a35f56c 2022-07-16 thomas /* clean sockets */
360 90d63d47 2022-08-16 thomas TAILQ_FOREACH_SAFE(sock, &gotwebd_env->sockets, entry, tsock) {
361 90d63d47 2022-08-16 thomas TAILQ_REMOVE(&gotwebd_env->sockets, sock, entry);
362 8a35f56c 2022-07-16 thomas close(sock->fd);
363 8a35f56c 2022-07-16 thomas free(sock);
366 8a35f56c 2022-07-16 thomas /* clean servers */
367 55e6cffd 2022-09-01 thomas TAILQ_FOREACH_SAFE(srv, &gotwebd_env->servers, entry, tsrv) {
368 55e6cffd 2022-09-01 thomas for (i = 0; i < srv->ncached_repos; i++)
369 55e6cffd 2022-09-01 thomas got_repo_close(srv->cached_repos[i].repo);
370 8a35f56c 2022-07-16 thomas free(srv);
373 8a35f56c 2022-07-16 thomas free(gotwebd_env);
377 8a35f56c 2022-07-16 thomas sockets_privinit(struct gotwebd *env, struct socket *sock)
379 8a35f56c 2022-07-16 thomas struct privsep *ps = env->gotwebd_ps;
381 720c2b05 2022-08-16 thomas if (sock->conf.af_type == AF_UNIX) {
382 8a35f56c 2022-07-16 thomas log_debug("%s: initializing unix socket %s", __func__,
383 8a35f56c 2022-07-16 thomas sock->conf.unix_socket_name);
384 8a35f56c 2022-07-16 thomas sock->fd = sockets_unix_socket_listen(ps, sock);
385 8a35f56c 2022-07-16 thomas if (sock->fd == -1) {
386 8a35f56c 2022-07-16 thomas log_warnx("%s: create unix socket failed", __func__);
387 8a35f56c 2022-07-16 thomas return -1;
391 720c2b05 2022-08-16 thomas if (sock->conf.af_type == AF_INET || sock->conf.af_type == AF_INET6) {
392 720c2b05 2022-08-16 thomas log_debug("%s: initializing %s FCGI socket on port %d for %s",
393 720c2b05 2022-08-16 thomas __func__, sock->conf.af_type == AF_INET ? "inet" : "inet6",
394 720c2b05 2022-08-16 thomas sock->conf.fcgi_socket_port, sock->conf.name);
395 9d7714e3 2022-08-27 thomas sock->fd = sockets_create_socket(&sock->conf.addr,
396 8a35f56c 2022-07-16 thomas sock->conf.fcgi_socket_port);
397 8a35f56c 2022-07-16 thomas if (sock->fd == -1) {
398 9d7714e3 2022-08-27 thomas log_warnx("%s: create FCGI socket failed", __func__);
399 8a35f56c 2022-07-16 thomas return -1;
403 8a35f56c 2022-07-16 thomas return 0;
406 1f6ec068 2022-08-27 thomas static int
407 8a35f56c 2022-07-16 thomas sockets_unix_socket_listen(struct privsep *ps, struct socket *sock)
409 8a35f56c 2022-07-16 thomas struct gotwebd *env = ps->ps_env;
410 8a35f56c 2022-07-16 thomas struct sockaddr_un sun;
411 8a35f56c 2022-07-16 thomas struct socket *tsock;
412 8a35f56c 2022-07-16 thomas int u_fd = -1;
413 8a35f56c 2022-07-16 thomas mode_t old_umask, mode;
415 90d63d47 2022-08-16 thomas TAILQ_FOREACH(tsock, &env->sockets, entry) {
416 8a35f56c 2022-07-16 thomas if (strcmp(tsock->conf.unix_socket_name,
417 8a35f56c 2022-07-16 thomas sock->conf.unix_socket_name) == 0 &&
418 8a35f56c 2022-07-16 thomas tsock->fd != -1)
419 8a35f56c 2022-07-16 thomas return (tsock->fd);
422 dd7a7d5b 2022-07-16 thomas /* TA: FIXME: this needs upstreaming. */
423 dd7a7d5b 2022-07-16 thomas int socket_flags = SOCK_STREAM | SOCK_NONBLOCK;
424 dd7a7d5b 2022-07-16 thomas #ifdef SOCK_CLOEXEC
425 dd7a7d5b 2022-07-16 thomas socket_flags |= SOCK_CLOEXEC;
427 dd7a7d5b 2022-07-16 thomas u_fd = socket(AF_UNIX, socket_flags, 0);
428 8a35f56c 2022-07-16 thomas if (u_fd == -1) {
429 8a35f56c 2022-07-16 thomas log_warn("%s: socket", __func__);
430 8a35f56c 2022-07-16 thomas return -1;
433 8a35f56c 2022-07-16 thomas sun.sun_family = AF_UNIX;
434 8a35f56c 2022-07-16 thomas if (strlcpy(sun.sun_path, sock->conf.unix_socket_name,
435 8a35f56c 2022-07-16 thomas sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
436 8a35f56c 2022-07-16 thomas log_warn("%s: %s name too long", __func__,
437 8a35f56c 2022-07-16 thomas sock->conf.unix_socket_name);
438 8a35f56c 2022-07-16 thomas close(u_fd);
439 8a35f56c 2022-07-16 thomas return -1;
442 8a35f56c 2022-07-16 thomas if (unlink(sock->conf.unix_socket_name) == -1) {
443 8a35f56c 2022-07-16 thomas if (errno != ENOENT) {
444 8a35f56c 2022-07-16 thomas log_warn("%s: unlink %s", __func__,
445 8a35f56c 2022-07-16 thomas sock->conf.unix_socket_name);
446 8a35f56c 2022-07-16 thomas close(u_fd);
447 8a35f56c 2022-07-16 thomas return -1;
451 8a35f56c 2022-07-16 thomas old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
452 8a35f56c 2022-07-16 thomas mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
454 8a35f56c 2022-07-16 thomas if (bind(u_fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
455 8a35f56c 2022-07-16 thomas log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
456 8a35f56c 2022-07-16 thomas close(u_fd);
457 8a35f56c 2022-07-16 thomas (void)umask(old_umask);
458 8a35f56c 2022-07-16 thomas return -1;
461 8a35f56c 2022-07-16 thomas (void)umask(old_umask);
463 8a35f56c 2022-07-16 thomas if (chmod(sock->conf.unix_socket_name, mode) == -1) {
464 8a35f56c 2022-07-16 thomas log_warn("%s: chmod", __func__);
465 8a35f56c 2022-07-16 thomas close(u_fd);
466 8a35f56c 2022-07-16 thomas (void)unlink(sock->conf.unix_socket_name);
467 8a35f56c 2022-07-16 thomas return -1;
470 8a35f56c 2022-07-16 thomas if (chown(sock->conf.unix_socket_name, ps->ps_pw->pw_uid,
471 8a35f56c 2022-07-16 thomas ps->ps_pw->pw_gid) == -1) {
472 8a35f56c 2022-07-16 thomas log_warn("%s: chown", __func__);
473 8a35f56c 2022-07-16 thomas close(u_fd);
474 8a35f56c 2022-07-16 thomas (void)unlink(sock->conf.unix_socket_name);
475 8a35f56c 2022-07-16 thomas return -1;
478 8a35f56c 2022-07-16 thomas if (listen(u_fd, SOCKS_BACKLOG) == -1) {
479 8a35f56c 2022-07-16 thomas log_warn("%s: listen", __func__);
480 8a35f56c 2022-07-16 thomas return -1;
483 8a35f56c 2022-07-16 thomas return u_fd;
486 1f6ec068 2022-08-27 thomas static int
487 9d7714e3 2022-08-27 thomas sockets_create_socket(struct address *a, in_port_t port)
489 8a35f56c 2022-07-16 thomas struct addrinfo hints;
490 8a35f56c 2022-07-16 thomas int fd = -1, o_val = 1, flags;
492 8a35f56c 2022-07-16 thomas memset(&hints, 0, sizeof(hints));
493 8a35f56c 2022-07-16 thomas hints.ai_family = AF_UNSPEC;
494 8a35f56c 2022-07-16 thomas hints.ai_socktype = SOCK_STREAM;
495 8a35f56c 2022-07-16 thomas hints.ai_flags |= AI_PASSIVE;
497 9d7714e3 2022-08-27 thomas switch (a->ss.ss_family) {
498 9d7714e3 2022-08-27 thomas case AF_INET:
499 c19738c9 2022-08-27 thomas ((struct sockaddr_in *)(&a->ss))->sin_port = htons(port);
501 9d7714e3 2022-08-27 thomas case AF_INET6:
502 c19738c9 2022-08-27 thomas ((struct sockaddr_in6 *)(&a->ss))->sin6_port = htons(port);
505 9d7714e3 2022-08-27 thomas log_warnx("%s: unknown address family", __func__);
506 9d7714e3 2022-08-27 thomas return -1;
509 9d7714e3 2022-08-27 thomas fd = socket(a->ss.ss_family, hints.ai_socktype, a->ipproto);
510 9d7714e3 2022-08-27 thomas if (fd == -1)
511 9d7714e3 2022-08-27 thomas return -1;
513 9d7714e3 2022-08-27 thomas log_debug("%s: opened socket (%d) for %s", __func__,
514 9d7714e3 2022-08-27 thomas fd, a->ifname);
516 9d7714e3 2022-08-27 thomas if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
517 9d7714e3 2022-08-27 thomas sizeof(int)) == -1) {
518 9d7714e3 2022-08-27 thomas log_warn("%s: setsockopt error", __func__);
519 9d7714e3 2022-08-27 thomas close(fd);
520 9d7714e3 2022-08-27 thomas return -1;
523 9d7714e3 2022-08-27 thomas /* non-blocking */
524 9d7714e3 2022-08-27 thomas flags = fcntl(fd, F_GETFL);
525 9d7714e3 2022-08-27 thomas flags |= O_NONBLOCK;
526 9d7714e3 2022-08-27 thomas if (fcntl(fd, F_SETFL, flags) == -1) {
527 9d7714e3 2022-08-27 thomas log_info("%s: could not enable non-blocking I/O", __func__);
528 9d7714e3 2022-08-27 thomas close(fd);
529 9d7714e3 2022-08-27 thomas return -1;
532 75716fd6 2022-08-27 thomas if (bind(fd, (struct sockaddr *)&a->ss, SS_LEN(&a->ss)) == -1) {
533 9d7714e3 2022-08-27 thomas close(fd);
534 9d7714e3 2022-08-27 thomas log_info("%s: can't bind to port %d", __func__,
535 9d7714e3 2022-08-27 thomas ntohs(port));
536 9d7714e3 2022-08-27 thomas return -1;
539 9d7714e3 2022-08-27 thomas if (listen(fd, SOMAXCONN) == -1) {
540 9d7714e3 2022-08-27 thomas log_warn("%s, unable to listen on socket", __func__);
541 9d7714e3 2022-08-27 thomas close(fd);
542 9d7714e3 2022-08-27 thomas return -1;
545 8a35f56c 2022-07-16 thomas return (fd);
548 1f6ec068 2022-08-27 thomas static int
549 8a35f56c 2022-07-16 thomas sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
550 8a35f56c 2022-07-16 thomas int reserve, volatile int *counter)
554 8a35f56c 2022-07-16 thomas if (getdtablecount() + reserve +
555 8a35f56c 2022-07-16 thomas ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
556 8a35f56c 2022-07-16 thomas log_debug("inflight fds exceeded");
557 8a35f56c 2022-07-16 thomas errno = EMFILE;
558 8a35f56c 2022-07-16 thomas return -1;
560 5ae43732 2022-07-16 thomas /* TA: This needs fixing upstream. */
561 5ae43732 2022-07-16 thomas #ifdef __APPLE__
562 5ae43732 2022-07-16 thomas ret = accept(sockfd, addr, addrlen);
564 5ae43732 2022-07-16 thomas ret = accept4(sockfd, addr, addrlen, SOCK_NONBLOCK | SOCK_CLOEXEC);
567 5ae43732 2022-07-16 thomas if (ret > -1) {
568 8a35f56c 2022-07-16 thomas (*counter)++;
569 8a35f56c 2022-07-16 thomas log_debug("inflight incremented, now %d", *counter);
572 8a35f56c 2022-07-16 thomas return ret;
575 1f6ec068 2022-08-27 thomas static void
576 8a35f56c 2022-07-16 thomas sockets_accept_paused(int fd, short events, void *arg)
578 8a35f56c 2022-07-16 thomas struct socket *sock = (struct socket *)arg;
580 8a35f56c 2022-07-16 thomas event_add(&sock->ev, NULL);
584 8a35f56c 2022-07-16 thomas sockets_socket_accept(int fd, short event, void *arg)
586 8a35f56c 2022-07-16 thomas struct socket *sock = (struct socket *)arg;
587 8a35f56c 2022-07-16 thomas struct sockaddr_storage ss;
588 8a35f56c 2022-07-16 thomas struct timeval backoff;
589 8a35f56c 2022-07-16 thomas struct request *c = NULL;
590 8a35f56c 2022-07-16 thomas socklen_t len;
593 8a35f56c 2022-07-16 thomas backoff.tv_sec = 1;
594 8a35f56c 2022-07-16 thomas backoff.tv_usec = 0;
596 8a35f56c 2022-07-16 thomas event_add(&sock->ev, NULL);
597 8a35f56c 2022-07-16 thomas if (event & EV_TIMEOUT)
600 8a35f56c 2022-07-16 thomas len = sizeof(ss);
602 8a35f56c 2022-07-16 thomas s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
603 8a35f56c 2022-07-16 thomas FD_RESERVE, &cgi_inflight);
605 8a35f56c 2022-07-16 thomas if (s == -1) {
606 8a35f56c 2022-07-16 thomas switch (errno) {
607 8a35f56c 2022-07-16 thomas case EINTR:
608 8a35f56c 2022-07-16 thomas case EWOULDBLOCK:
609 8a35f56c 2022-07-16 thomas case ECONNABORTED:
611 8a35f56c 2022-07-16 thomas case EMFILE:
612 8a35f56c 2022-07-16 thomas case ENFILE:
613 8a35f56c 2022-07-16 thomas event_del(&sock->ev);
614 8a35f56c 2022-07-16 thomas evtimer_add(&sock->pause, &backoff);
617 8a35f56c 2022-07-16 thomas log_warn("%s: accept", __func__);
621 8a35f56c 2022-07-16 thomas if (client_cnt > GOTWEBD_MAXCLIENTS)
622 8a35f56c 2022-07-16 thomas goto err;
624 8a35f56c 2022-07-16 thomas c = calloc(1, sizeof(struct request));
625 8a35f56c 2022-07-16 thomas if (c == NULL) {
626 8a35f56c 2022-07-16 thomas log_warn("%s", __func__);
627 8a35f56c 2022-07-16 thomas close(s);
628 8a35f56c 2022-07-16 thomas cgi_inflight--;
632 8a35f56c 2022-07-16 thomas c->fd = s;
633 8a35f56c 2022-07-16 thomas c->sock = sock;
634 8a35f56c 2022-07-16 thomas memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
635 8a35f56c 2022-07-16 thomas c->buf_pos = 0;
636 8a35f56c 2022-07-16 thomas c->buf_len = 0;
637 8a35f56c 2022-07-16 thomas c->request_started = 0;
638 8a35f56c 2022-07-16 thomas c->sock->client_status = CLIENT_CONNECT;
640 8a35f56c 2022-07-16 thomas event_set(&c->ev, s, EV_READ, fcgi_request, c);
641 8a35f56c 2022-07-16 thomas event_add(&c->ev, NULL);
643 8a35f56c 2022-07-16 thomas evtimer_set(&c->tmo, fcgi_timeout, c);
644 8a35f56c 2022-07-16 thomas evtimer_add(&c->tmo, &timeout);
646 8a35f56c 2022-07-16 thomas client_cnt++;
650 8a35f56c 2022-07-16 thomas cgi_inflight--;
651 8a35f56c 2022-07-16 thomas close(s);
652 8a35f56c 2022-07-16 thomas if (c != NULL)
656 1f6ec068 2022-08-27 thomas static void
657 8a35f56c 2022-07-16 thomas sockets_rlimit(int maxfd)
659 8a35f56c 2022-07-16 thomas struct rlimit rl;
661 8a35f56c 2022-07-16 thomas if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
662 8a35f56c 2022-07-16 thomas fatal("%s: failed to get resource limit", __func__);
663 ceac46c9 2022-07-17 thomas log_debug("%s: max open files %llu", __func__,
664 ceac46c9 2022-07-17 thomas (unsigned long long)rl.rlim_max);
667 8a35f56c 2022-07-16 thomas * Allow the maximum number of open file descriptors for this
668 8a35f56c 2022-07-16 thomas * login class (which should be the class "daemon" by default).
670 8a35f56c 2022-07-16 thomas if (maxfd == -1)
671 8a35f56c 2022-07-16 thomas rl.rlim_cur = rl.rlim_max;
673 8a35f56c 2022-07-16 thomas rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
674 8a35f56c 2022-07-16 thomas if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
675 8a35f56c 2022-07-16 thomas fatal("%s: failed to set resource limit", __func__);
