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>
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.
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.
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>
33 a596b957 2022-07-14 tracey #include <net/if.h>
34 a596b957 2022-07-14 tracey #include <netinet/in.h>
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>
52 a596b957 2022-07-14 tracey #include "got_error.h"
53 a596b957 2022-07-14 tracey #include "got_opentemp.h"
55 a596b957 2022-07-14 tracey #include "proc.h"
56 a596b957 2022-07-14 tracey #include "gotwebd.h"
58 a596b957 2022-07-14 tracey #define SOCKS_BACKLOG 5
59 a596b957 2022-07-14 tracey #define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
62 a596b957 2022-07-14 tracey volatile int client_cnt;
64 a596b957 2022-07-14 tracey struct timeval timeout = { TIMEOUT_DEFAULT, 0 };
66 a596b957 2022-07-14 tracey void sockets_sighdlr(int, short, void *);
67 a596b957 2022-07-14 tracey void sockets_run(struct privsep *, struct privsep_proc *, void *);
68 a596b957 2022-07-14 tracey void sockets_launch(void);
69 a596b957 2022-07-14 tracey void sockets_purge(struct gotwebd *);
70 a596b957 2022-07-14 tracey void sockets_accept_paused(int, short, void *);
71 a596b957 2022-07-14 tracey void sockets_rlimit(int);
74 a596b957 2022-07-14 tracey int sockets_dispatch_gotwebd(int, struct privsep_proc *, struct imsg *);
75 a596b957 2022-07-14 tracey int sockets_unix_socket_listen(struct privsep *, struct socket *);
76 a596b957 2022-07-14 tracey int sockets_create_socket(struct addresslist *, in_port_t);
77 a596b957 2022-07-14 tracey int sockets_accept_reserve(int, struct sockaddr *, socklen_t *, int,
78 a596b957 2022-07-14 tracey volatile int *);
80 4fcc9f74 2022-08-16 stsp struct socket *sockets_conf_new_socket(struct gotwebd *, struct server *,
83 a596b957 2022-07-14 tracey int cgi_inflight = 0;
85 a596b957 2022-07-14 tracey static struct privsep_proc procs[] = {
86 a596b957 2022-07-14 tracey { "gotwebd", PROC_GOTWEBD, sockets_dispatch_gotwebd },
90 a596b957 2022-07-14 tracey sockets(struct privsep *ps, struct privsep_proc *p)
92 a596b957 2022-07-14 tracey proc_run(ps, p, procs, nitems(procs), sockets_run, NULL);
96 a596b957 2022-07-14 tracey sockets_run(struct privsep *ps, struct privsep_proc *p, void *arg)
98 a596b957 2022-07-14 tracey if (config_init(ps->ps_env) == -1)
99 a596b957 2022-07-14 tracey fatal("failed to initialize configuration");
101 a596b957 2022-07-14 tracey p->p_shutdown = sockets_shutdown;
103 a596b957 2022-07-14 tracey sockets_rlimit(-1);
105 a596b957 2022-07-14 tracey signal_del(&ps->ps_evsigchld);
106 a596b957 2022-07-14 tracey signal_set(&ps->ps_evsigchld, SIGCHLD, sockets_sighdlr, ps);
107 a596b957 2022-07-14 tracey signal_add(&ps->ps_evsigchld, NULL);
109 a596b957 2022-07-14 tracey #ifndef PROFILE
110 a596b957 2022-07-14 tracey if (pledge("stdio rpath wpath cpath inet recvfd proc exec sendfd",
111 a596b957 2022-07-14 tracey NULL) == -1)
112 a596b957 2022-07-14 tracey fatal("pledge");
117 a596b957 2022-07-14 tracey sockets_parse_sockets(struct gotwebd *env)
119 a596b957 2022-07-14 tracey struct server *srv;
120 4fcc9f74 2022-08-16 stsp struct socket *new_sock = NULL;
121 a596b957 2022-07-14 tracey int sock_id = 0, ipv4 = 0, ipv6 = 0;
123 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH(srv, &env->servers, entry) {
124 a596b957 2022-07-14 tracey if (srv->unix_socket) {
125 a596b957 2022-07-14 tracey sock_id++;
126 a596b957 2022-07-14 tracey new_sock = sockets_conf_new_socket(env, srv,
127 4fcc9f74 2022-08-16 stsp sock_id, AF_UNIX);
128 4fcc9f74 2022-08-16 stsp /* Should always succeed. */
129 2ad48e9a 2022-08-16 stsp TAILQ_INSERT_TAIL(&env->sockets, new_sock, entry);
132 a596b957 2022-07-14 tracey if (srv->fcgi_socket) {
133 a596b957 2022-07-14 tracey sock_id++;
134 4fcc9f74 2022-08-16 stsp new_sock = sockets_conf_new_socket(env, srv, sock_id,
136 4fcc9f74 2022-08-16 stsp if (new_sock) {
137 4fcc9f74 2022-08-16 stsp TAILQ_INSERT_TAIL(&env->sockets, new_sock,
143 4fcc9f74 2022-08-16 stsp new_sock = sockets_conf_new_socket(env, srv, sock_id,
145 4fcc9f74 2022-08-16 stsp if (new_sock) {
146 4fcc9f74 2022-08-16 stsp TAILQ_INSERT_TAIL(&env->sockets,
147 4fcc9f74 2022-08-16 stsp new_sock, entry);
151 4fcc9f74 2022-08-16 stsp if (ipv4 == 0 && ipv6 == 0) {
152 4fcc9f74 2022-08-16 stsp fatalx("%s: have no IP addresses to listen "
153 4fcc9f74 2022-08-16 stsp "for FCGI connections", __func__);
159 4fcc9f74 2022-08-16 stsp /* Returns NULL if no addresses in the requested family are configured. */
160 a596b957 2022-07-14 tracey struct socket *
161 a596b957 2022-07-14 tracey sockets_conf_new_socket(struct gotwebd *env, struct server *srv, int id,
162 4fcc9f74 2022-08-16 stsp int af_type)
164 a596b957 2022-07-14 tracey struct socket *sock;
165 a596b957 2022-07-14 tracey struct address *a, *acp;
168 a596b957 2022-07-14 tracey if ((sock = calloc(1, sizeof(*sock))) == NULL)
169 a596b957 2022-07-14 tracey fatalx("%s: calloc", __func__);
171 e087e1f6 2022-08-16 stsp TAILQ_INIT(&sock->conf.al);
173 a596b957 2022-07-14 tracey sock->conf.id = id;
174 a596b957 2022-07-14 tracey sock->fd = -1;
175 4fcc9f74 2022-08-16 stsp sock->conf.af_type = af_type;
177 4fcc9f74 2022-08-16 stsp if (af_type == AF_UNIX) {
178 a596b957 2022-07-14 tracey if (strlcpy(sock->conf.unix_socket_name,
179 a596b957 2022-07-14 tracey srv->unix_socket_name,
180 a596b957 2022-07-14 tracey sizeof(sock->conf.unix_socket_name)) >=
181 a596b957 2022-07-14 tracey sizeof(sock->conf.unix_socket_name)) {
182 a596b957 2022-07-14 tracey free(sock);
183 a596b957 2022-07-14 tracey fatalx("%s: strlcpy", __func__);
187 a596b957 2022-07-14 tracey sock->conf.fcgi_socket_port = srv->fcgi_socket_port;
189 a596b957 2022-07-14 tracey n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
190 a596b957 2022-07-14 tracey srv->name);
191 438d0cc3 2022-08-16 op if (n < 0 || (size_t)n >= GOTWEBD_MAXTEXT) {
192 a596b957 2022-07-14 tracey free(sock);
193 a596b957 2022-07-14 tracey fatalx("%s: snprintf", __func__);
196 a596b957 2022-07-14 tracey if (strlcpy(sock->conf.srv_name, srv->name,
197 a596b957 2022-07-14 tracey sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
198 a596b957 2022-07-14 tracey free(sock);
199 a596b957 2022-07-14 tracey fatalx("%s: strlcpy", __func__);
202 e087e1f6 2022-08-16 stsp TAILQ_FOREACH(a, &srv->al, entry) {
203 4fcc9f74 2022-08-16 stsp if (a->ss.ss_family != af_type)
206 a596b957 2022-07-14 tracey if ((acp = calloc(1, sizeof(*acp))) == NULL) {
207 a596b957 2022-07-14 tracey free(sock);
208 a596b957 2022-07-14 tracey fatal("%s: calloc", __func__);
210 a596b957 2022-07-14 tracey memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
211 a596b957 2022-07-14 tracey acp->ipproto = a->ipproto;
212 a596b957 2022-07-14 tracey acp->prefixlen = a->prefixlen;
213 a596b957 2022-07-14 tracey acp->port = a->port;
214 a596b957 2022-07-14 tracey if (strlen(a->ifname) != 0) {
215 a596b957 2022-07-14 tracey if (strlcpy(acp->ifname, a->ifname,
216 a596b957 2022-07-14 tracey sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
217 a596b957 2022-07-14 tracey fatalx("%s: interface name truncated",
218 a596b957 2022-07-14 tracey __func__);
222 e087e1f6 2022-08-16 stsp TAILQ_INSERT_TAIL(&sock->conf.al, acp, entry);
225 4fcc9f74 2022-08-16 stsp if ((af_type == AF_INET || af_type == AF_INET6) &&
226 4fcc9f74 2022-08-16 stsp TAILQ_EMPTY(&sock->conf.al)) {
227 4fcc9f74 2022-08-16 stsp free(sock);
228 4fcc9f74 2022-08-16 stsp return NULL;
231 a596b957 2022-07-14 tracey return (sock);
235 a596b957 2022-07-14 tracey sockets_launch(void)
237 a596b957 2022-07-14 tracey struct socket *sock;
239 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH(sock, &gotwebd_env->sockets, entry) {
240 a596b957 2022-07-14 tracey log_debug("%s: configuring socket %d (%d)", __func__,
241 a596b957 2022-07-14 tracey sock->conf.id, sock->fd);
243 a596b957 2022-07-14 tracey event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
244 a596b957 2022-07-14 tracey sockets_socket_accept, sock);
246 a596b957 2022-07-14 tracey if (event_add(&sock->ev, NULL))
247 a596b957 2022-07-14 tracey fatalx("event add sock");
249 a596b957 2022-07-14 tracey evtimer_set(&sock->pause, sockets_accept_paused, sock);
251 a596b957 2022-07-14 tracey log_debug("%s: running socket listener %d", __func__,
252 a596b957 2022-07-14 tracey sock->conf.id);
257 a596b957 2022-07-14 tracey sockets_purge(struct gotwebd *env)
259 a596b957 2022-07-14 tracey struct socket *sock, *tsock;
261 a596b957 2022-07-14 tracey /* shutdown and remove sockets */
262 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH_SAFE(sock, &env->sockets, entry, tsock) {
263 a596b957 2022-07-14 tracey if (event_initialized(&sock->ev))
264 a596b957 2022-07-14 tracey event_del(&sock->ev);
265 a596b957 2022-07-14 tracey if (evtimer_initialized(&sock->evt))
266 a596b957 2022-07-14 tracey evtimer_del(&sock->evt);
267 a596b957 2022-07-14 tracey if (evtimer_initialized(&sock->pause))
268 a596b957 2022-07-14 tracey evtimer_del(&sock->pause);
269 a596b957 2022-07-14 tracey if (sock->fd != -1)
270 a596b957 2022-07-14 tracey close(sock->fd);
271 2ad48e9a 2022-08-16 stsp TAILQ_REMOVE(&env->sockets, sock, entry);
276 a596b957 2022-07-14 tracey sockets_dispatch_gotwebd(int fd, struct privsep_proc *p, struct imsg *imsg)
278 a596b957 2022-07-14 tracey struct privsep *ps = p->p_ps;
279 a596b957 2022-07-14 tracey int res = 0, cmd = 0, verbose;
281 a596b957 2022-07-14 tracey switch (imsg->hdr.type) {
282 a596b957 2022-07-14 tracey case IMSG_CFG_SRV:
283 a596b957 2022-07-14 tracey config_getserver(gotwebd_env, imsg);
285 a596b957 2022-07-14 tracey case IMSG_CFG_SOCK:
286 a596b957 2022-07-14 tracey config_getsock(gotwebd_env, imsg);
288 a596b957 2022-07-14 tracey case IMSG_CFG_FD:
289 a596b957 2022-07-14 tracey config_getfd(gotwebd_env, imsg);
291 a596b957 2022-07-14 tracey case IMSG_CFG_DONE:
292 a596b957 2022-07-14 tracey config_getcfg(gotwebd_env, imsg);
294 a596b957 2022-07-14 tracey case IMSG_CTL_START:
295 a596b957 2022-07-14 tracey sockets_launch();
297 a596b957 2022-07-14 tracey case IMSG_CTL_VERBOSE:
298 a596b957 2022-07-14 tracey IMSG_SIZE_CHECK(imsg, &verbose);
299 a596b957 2022-07-14 tracey memcpy(&verbose, imsg->data, sizeof(verbose));
300 a596b957 2022-07-14 tracey log_setverbose(verbose);
303 a596b957 2022-07-14 tracey return -1;
306 a596b957 2022-07-14 tracey switch (cmd) {
310 a596b957 2022-07-14 tracey if (proc_compose_imsg(ps, PROC_GOTWEBD, -1, cmd,
311 a596b957 2022-07-14 tracey imsg->hdr.peerid, -1, &res, sizeof(res)) == -1)
312 a596b957 2022-07-14 tracey return -1;
316 a596b957 2022-07-14 tracey return 0;
320 a596b957 2022-07-14 tracey sockets_sighdlr(int sig, short event, void *arg)
322 a596b957 2022-07-14 tracey switch (sig) {
323 a596b957 2022-07-14 tracey case SIGHUP:
324 a596b957 2022-07-14 tracey log_info("%s: ignoring SIGHUP", __func__);
326 a596b957 2022-07-14 tracey case SIGPIPE:
327 a596b957 2022-07-14 tracey log_info("%s: ignoring SIGPIPE", __func__);
329 a596b957 2022-07-14 tracey case SIGUSR1:
330 a596b957 2022-07-14 tracey log_info("%s: ignoring SIGUSR1", __func__);
332 a596b957 2022-07-14 tracey case SIGCHLD:
335 a596b957 2022-07-14 tracey log_info("SIGNAL: %d", sig);
336 a596b957 2022-07-14 tracey fatalx("unexpected signal");
341 a596b957 2022-07-14 tracey sockets_shutdown(void)
343 a596b957 2022-07-14 tracey struct server *srv, *tsrv;
344 a596b957 2022-07-14 tracey struct socket *sock, *tsock;
346 a596b957 2022-07-14 tracey sockets_purge(gotwebd_env);
348 a596b957 2022-07-14 tracey /* clean sockets */
349 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH_SAFE(sock, &gotwebd_env->sockets, entry, tsock) {
350 2ad48e9a 2022-08-16 stsp TAILQ_REMOVE(&gotwebd_env->sockets, sock, entry);
351 a596b957 2022-07-14 tracey close(sock->fd);
352 a596b957 2022-07-14 tracey free(sock);
355 a596b957 2022-07-14 tracey /* clean servers */
356 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH_SAFE(srv, &gotwebd_env->servers, entry, tsrv)
357 a596b957 2022-07-14 tracey free(srv);
359 a596b957 2022-07-14 tracey free(gotwebd_env);
363 a596b957 2022-07-14 tracey sockets_privinit(struct gotwebd *env, struct socket *sock)
365 a596b957 2022-07-14 tracey struct privsep *ps = env->gotwebd_ps;
367 4fcc9f74 2022-08-16 stsp if (sock->conf.af_type == AF_UNIX) {
368 a596b957 2022-07-14 tracey log_debug("%s: initializing unix socket %s", __func__,
369 a596b957 2022-07-14 tracey sock->conf.unix_socket_name);
370 a596b957 2022-07-14 tracey sock->fd = sockets_unix_socket_listen(ps, sock);
371 a596b957 2022-07-14 tracey if (sock->fd == -1) {
372 a596b957 2022-07-14 tracey log_warnx("%s: create unix socket failed", __func__);
373 a596b957 2022-07-14 tracey return -1;
377 4fcc9f74 2022-08-16 stsp if (sock->conf.af_type == AF_INET || sock->conf.af_type == AF_INET6) {
378 4fcc9f74 2022-08-16 stsp log_debug("%s: initializing %s FCGI socket on port %d for %s",
379 4fcc9f74 2022-08-16 stsp __func__, sock->conf.af_type == AF_INET ? "inet" : "inet6",
380 4fcc9f74 2022-08-16 stsp sock->conf.fcgi_socket_port, sock->conf.name);
381 e087e1f6 2022-08-16 stsp sock->fd = sockets_create_socket(&sock->conf.al,
382 a596b957 2022-07-14 tracey sock->conf.fcgi_socket_port);
383 a596b957 2022-07-14 tracey if (sock->fd == -1) {
384 a596b957 2022-07-14 tracey log_warnx("%s: create unix socket failed", __func__);
385 a596b957 2022-07-14 tracey return -1;
389 a596b957 2022-07-14 tracey return 0;
393 a596b957 2022-07-14 tracey sockets_unix_socket_listen(struct privsep *ps, struct socket *sock)
395 a596b957 2022-07-14 tracey struct gotwebd *env = ps->ps_env;
396 a596b957 2022-07-14 tracey struct sockaddr_un sun;
397 a596b957 2022-07-14 tracey struct socket *tsock;
398 a596b957 2022-07-14 tracey int u_fd = -1;
399 a596b957 2022-07-14 tracey mode_t old_umask, mode;
401 2ad48e9a 2022-08-16 stsp TAILQ_FOREACH(tsock, &env->sockets, entry) {
402 a596b957 2022-07-14 tracey if (strcmp(tsock->conf.unix_socket_name,
403 a596b957 2022-07-14 tracey sock->conf.unix_socket_name) == 0 &&
404 a596b957 2022-07-14 tracey tsock->fd != -1)
405 a596b957 2022-07-14 tracey return (tsock->fd);
408 a596b957 2022-07-14 tracey u_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
409 a596b957 2022-07-14 tracey if (u_fd == -1) {
410 a596b957 2022-07-14 tracey log_warn("%s: socket", __func__);
411 a596b957 2022-07-14 tracey return -1;
414 a596b957 2022-07-14 tracey sun.sun_family = AF_UNIX;
415 a596b957 2022-07-14 tracey if (strlcpy(sun.sun_path, sock->conf.unix_socket_name,
416 a596b957 2022-07-14 tracey sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
417 a596b957 2022-07-14 tracey log_warn("%s: %s name too long", __func__,
418 a596b957 2022-07-14 tracey sock->conf.unix_socket_name);
419 a596b957 2022-07-14 tracey close(u_fd);
420 a596b957 2022-07-14 tracey return -1;
423 a596b957 2022-07-14 tracey if (unlink(sock->conf.unix_socket_name) == -1) {
424 a596b957 2022-07-14 tracey if (errno != ENOENT) {
425 a596b957 2022-07-14 tracey log_warn("%s: unlink %s", __func__,
426 a596b957 2022-07-14 tracey sock->conf.unix_socket_name);
427 a596b957 2022-07-14 tracey close(u_fd);
428 a596b957 2022-07-14 tracey return -1;
432 a596b957 2022-07-14 tracey old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
433 a596b957 2022-07-14 tracey mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
435 a596b957 2022-07-14 tracey if (bind(u_fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
436 a596b957 2022-07-14 tracey log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
437 a596b957 2022-07-14 tracey close(u_fd);
438 a596b957 2022-07-14 tracey (void)umask(old_umask);
439 a596b957 2022-07-14 tracey return -1;
442 a596b957 2022-07-14 tracey (void)umask(old_umask);
444 a596b957 2022-07-14 tracey if (chmod(sock->conf.unix_socket_name, mode) == -1) {
445 a596b957 2022-07-14 tracey log_warn("%s: chmod", __func__);
446 a596b957 2022-07-14 tracey close(u_fd);
447 a596b957 2022-07-14 tracey (void)unlink(sock->conf.unix_socket_name);
448 a596b957 2022-07-14 tracey return -1;
451 a596b957 2022-07-14 tracey if (chown(sock->conf.unix_socket_name, ps->ps_pw->pw_uid,
452 a596b957 2022-07-14 tracey ps->ps_pw->pw_gid) == -1) {
453 a596b957 2022-07-14 tracey log_warn("%s: chown", __func__);
454 a596b957 2022-07-14 tracey close(u_fd);
455 a596b957 2022-07-14 tracey (void)unlink(sock->conf.unix_socket_name);
456 a596b957 2022-07-14 tracey return -1;
459 a596b957 2022-07-14 tracey if (listen(u_fd, SOCKS_BACKLOG) == -1) {
460 a596b957 2022-07-14 tracey log_warn("%s: listen", __func__);
461 a596b957 2022-07-14 tracey return -1;
464 a596b957 2022-07-14 tracey return u_fd;
468 a596b957 2022-07-14 tracey sockets_create_socket(struct addresslist *al, in_port_t port)
470 a596b957 2022-07-14 tracey struct addrinfo hints;
471 a596b957 2022-07-14 tracey struct address *a;
472 a596b957 2022-07-14 tracey int fd = -1, o_val = 1, flags;
474 a596b957 2022-07-14 tracey memset(&hints, 0, sizeof(hints));
475 a596b957 2022-07-14 tracey hints.ai_family = AF_UNSPEC;
476 a596b957 2022-07-14 tracey hints.ai_socktype = SOCK_STREAM;
477 a596b957 2022-07-14 tracey hints.ai_flags |= AI_PASSIVE;
479 a596b957 2022-07-14 tracey TAILQ_FOREACH(a, al, entry) {
480 14aa6a72 2022-08-06 stsp switch (a->ss.ss_family) {
481 14aa6a72 2022-08-06 stsp case AF_INET:
482 14aa6a72 2022-08-06 stsp ((struct sockaddr_in *)(&a->ss))->sin_port = port;
484 14aa6a72 2022-08-06 stsp case AF_INET6:
485 14aa6a72 2022-08-06 stsp ((struct sockaddr_in6 *)(&a->ss))->sin6_port = port;
488 14aa6a72 2022-08-06 stsp log_warnx("%s: unknown address family", __func__);
489 a596b957 2022-07-14 tracey goto fail;
492 a596b957 2022-07-14 tracey fd = socket(a->ss.ss_family, hints.ai_socktype,
493 a596b957 2022-07-14 tracey a->ipproto);
494 a596b957 2022-07-14 tracey log_debug("%s: opening socket (%d) for %s", __func__,
495 a596b957 2022-07-14 tracey fd, a->ifname);
497 a596b957 2022-07-14 tracey if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
498 a596b957 2022-07-14 tracey sizeof(int)) == -1) {
499 a596b957 2022-07-14 tracey log_warn("%s: setsockopt error", __func__);
500 a596b957 2022-07-14 tracey return -1;
503 a596b957 2022-07-14 tracey /* non-blocking */
504 a596b957 2022-07-14 tracey flags = fcntl(fd, F_GETFL);
505 a596b957 2022-07-14 tracey flags |= O_NONBLOCK;
506 a596b957 2022-07-14 tracey fcntl(fd, F_SETFL, flags);
508 a596b957 2022-07-14 tracey if (bind(fd, (struct sockaddr *)&a->ss, a->ss.ss_len) == -1) {
509 a596b957 2022-07-14 tracey close(fd);
510 a596b957 2022-07-14 tracey log_info("%s: can't bind to port %d", __func__,
511 a596b957 2022-07-14 tracey ntohs(port));
512 a596b957 2022-07-14 tracey goto fail;
515 a596b957 2022-07-14 tracey if (listen(fd, SOMAXCONN) == -1) {
516 a596b957 2022-07-14 tracey log_warn("%s, unable to listen on socket", __func__);
517 a596b957 2022-07-14 tracey goto fail;
522 a596b957 2022-07-14 tracey return (fd);
525 a596b957 2022-07-14 tracey return -1;
529 a596b957 2022-07-14 tracey sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
530 a596b957 2022-07-14 tracey int reserve, volatile int *counter)
534 a596b957 2022-07-14 tracey if (getdtablecount() + reserve +
535 a596b957 2022-07-14 tracey ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
536 a596b957 2022-07-14 tracey log_debug("inflight fds exceeded");
537 a596b957 2022-07-14 tracey errno = EMFILE;
538 a596b957 2022-07-14 tracey return -1;
541 a596b957 2022-07-14 tracey if ((ret = accept4(sockfd, addr, addrlen,
542 a596b957 2022-07-14 tracey SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
543 a596b957 2022-07-14 tracey (*counter)++;
544 a596b957 2022-07-14 tracey log_debug("inflight incremented, now %d", *counter);
547 a596b957 2022-07-14 tracey return ret;
551 a596b957 2022-07-14 tracey sockets_accept_paused(int fd, short events, void *arg)
553 a596b957 2022-07-14 tracey struct socket *sock = (struct socket *)arg;
555 a596b957 2022-07-14 tracey event_add(&sock->ev, NULL);
559 a596b957 2022-07-14 tracey sockets_socket_accept(int fd, short event, void *arg)
561 a596b957 2022-07-14 tracey struct socket *sock = (struct socket *)arg;
562 a596b957 2022-07-14 tracey struct sockaddr_storage ss;
563 a596b957 2022-07-14 tracey struct timeval backoff;
564 a596b957 2022-07-14 tracey struct request *c = NULL;
565 a596b957 2022-07-14 tracey socklen_t len;
568 a596b957 2022-07-14 tracey backoff.tv_sec = 1;
569 a596b957 2022-07-14 tracey backoff.tv_usec = 0;
571 a596b957 2022-07-14 tracey event_add(&sock->ev, NULL);
572 a596b957 2022-07-14 tracey if (event & EV_TIMEOUT)
575 a596b957 2022-07-14 tracey len = sizeof(ss);
577 a596b957 2022-07-14 tracey s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
578 a596b957 2022-07-14 tracey FD_RESERVE, &cgi_inflight);
580 a596b957 2022-07-14 tracey if (s == -1) {
581 a596b957 2022-07-14 tracey switch (errno) {
582 a596b957 2022-07-14 tracey case EINTR:
583 a596b957 2022-07-14 tracey case EWOULDBLOCK:
584 a596b957 2022-07-14 tracey case ECONNABORTED:
586 a596b957 2022-07-14 tracey case EMFILE:
587 a596b957 2022-07-14 tracey case ENFILE:
588 a596b957 2022-07-14 tracey event_del(&sock->ev);
589 a596b957 2022-07-14 tracey evtimer_add(&sock->pause, &backoff);
592 a596b957 2022-07-14 tracey log_warn("%s: accept", __func__);
596 a596b957 2022-07-14 tracey if (client_cnt > GOTWEBD_MAXCLIENTS)
597 a596b957 2022-07-14 tracey goto err;
599 a596b957 2022-07-14 tracey c = calloc(1, sizeof(struct request));
600 a596b957 2022-07-14 tracey if (c == NULL) {
601 a596b957 2022-07-14 tracey log_warn("%s", __func__);
602 a596b957 2022-07-14 tracey close(s);
603 a596b957 2022-07-14 tracey cgi_inflight--;
607 a596b957 2022-07-14 tracey c->fd = s;
608 a596b957 2022-07-14 tracey c->sock = sock;
609 a596b957 2022-07-14 tracey memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
610 a596b957 2022-07-14 tracey c->buf_pos = 0;
611 a596b957 2022-07-14 tracey c->buf_len = 0;
612 a596b957 2022-07-14 tracey c->request_started = 0;
613 a596b957 2022-07-14 tracey c->sock->client_status = CLIENT_CONNECT;
615 a596b957 2022-07-14 tracey event_set(&c->ev, s, EV_READ, fcgi_request, c);
616 a596b957 2022-07-14 tracey event_add(&c->ev, NULL);
618 a596b957 2022-07-14 tracey evtimer_set(&c->tmo, fcgi_timeout, c);
619 a596b957 2022-07-14 tracey evtimer_add(&c->tmo, &timeout);
621 a596b957 2022-07-14 tracey client_cnt++;
625 a596b957 2022-07-14 tracey cgi_inflight--;
626 a596b957 2022-07-14 tracey close(s);
627 a596b957 2022-07-14 tracey if (c != NULL)
632 a596b957 2022-07-14 tracey sockets_rlimit(int maxfd)
634 a596b957 2022-07-14 tracey struct rlimit rl;
636 a596b957 2022-07-14 tracey if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
637 a596b957 2022-07-14 tracey fatal("%s: failed to get resource limit", __func__);
638 d6267a62 2022-07-17 naddy log_debug("%s: max open files %llu", __func__,
639 d6267a62 2022-07-17 naddy (unsigned long long)rl.rlim_max);
642 a596b957 2022-07-14 tracey * Allow the maximum number of open file descriptors for this
643 a596b957 2022-07-14 tracey * login class (which should be the class "daemon" by default).
645 a596b957 2022-07-14 tracey if (maxfd == -1)
646 a596b957 2022-07-14 tracey rl.rlim_cur = rl.rlim_max;
648 a596b957 2022-07-14 tracey rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
649 a596b957 2022-07-14 tracey if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
650 a596b957 2022-07-14 tracey fatal("%s: failed to set resource limit", __func__);
