2 d93ecf7d 2022-12-14 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 d93ecf7d 2022-12-14 stsp * Permission to use, copy, modify, and distribute this software for any
5 d93ecf7d 2022-12-14 stsp * purpose with or without fee is hereby granted, provided that the above
6 d93ecf7d 2022-12-14 stsp * copyright notice and this permission notice appear in all copies.
8 d93ecf7d 2022-12-14 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 d93ecf7d 2022-12-14 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 d93ecf7d 2022-12-14 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 d93ecf7d 2022-12-14 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 d93ecf7d 2022-12-14 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 d93ecf7d 2022-12-14 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 d93ecf7d 2022-12-14 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 d93ecf7d 2022-12-14 stsp #include <sys/types.h>
18 d93ecf7d 2022-12-14 stsp #include <sys/queue.h>
19 d93ecf7d 2022-12-14 stsp #include <sys/socket.h>
20 d93ecf7d 2022-12-14 stsp #include <sys/uio.h>
22 d93ecf7d 2022-12-14 stsp #include <errno.h>
23 d93ecf7d 2022-12-14 stsp #include <event.h>
24 d93ecf7d 2022-12-14 stsp #include <siphash.h>
25 d93ecf7d 2022-12-14 stsp #include <stdint.h>
26 d93ecf7d 2022-12-14 stsp #include <stdio.h>
27 d93ecf7d 2022-12-14 stsp #include <stdlib.h>
28 d93ecf7d 2022-12-14 stsp #include <string.h>
29 d93ecf7d 2022-12-14 stsp #include <imsg.h>
30 d93ecf7d 2022-12-14 stsp #include <limits.h>
31 d93ecf7d 2022-12-14 stsp #include <sha1.h>
32 d93ecf7d 2022-12-14 stsp #include <signal.h>
33 d93ecf7d 2022-12-14 stsp #include <unistd.h>
35 d93ecf7d 2022-12-14 stsp #include "got_error.h"
37 d93ecf7d 2022-12-14 stsp #include "gotd.h"
38 d93ecf7d 2022-12-14 stsp #include "log.h"
39 d93ecf7d 2022-12-14 stsp #include "listen.h"
41 d93ecf7d 2022-12-14 stsp #ifndef nitems
42 d93ecf7d 2022-12-14 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
45 d93ecf7d 2022-12-14 stsp struct gotd_listen_client {
46 d93ecf7d 2022-12-14 stsp STAILQ_ENTRY(gotd_listen_client) entry;
47 d93ecf7d 2022-12-14 stsp uint32_t id;
51 d93ecf7d 2022-12-14 stsp STAILQ_HEAD(gotd_listen_clients, gotd_listen_client);
53 d93ecf7d 2022-12-14 stsp static struct gotd_listen_clients gotd_listen_clients[GOTD_CLIENT_TABLE_SIZE];
54 d93ecf7d 2022-12-14 stsp static SIPHASH_KEY clients_hash_key;
55 d93ecf7d 2022-12-14 stsp static volatile int listen_client_cnt;
56 d93ecf7d 2022-12-14 stsp static int inflight;
58 7a0564e3 2022-12-30 stsp struct gotd_uid_connection_counter {
59 7a0564e3 2022-12-30 stsp STAILQ_ENTRY(gotd_uid_connection_counter) entry;
61 7a0564e3 2022-12-30 stsp int nconnections;
63 7a0564e3 2022-12-30 stsp STAILQ_HEAD(gotd_client_uids, gotd_uid_connection_counter);
64 7a0564e3 2022-12-30 stsp static struct gotd_client_uids gotd_client_uids[GOTD_CLIENT_TABLE_SIZE];
65 7a0564e3 2022-12-30 stsp static SIPHASH_KEY uid_hash_key;
67 d93ecf7d 2022-12-14 stsp static struct {
69 d93ecf7d 2022-12-14 stsp const char *title;
71 d93ecf7d 2022-12-14 stsp struct gotd_imsgev iev;
72 d93ecf7d 2022-12-14 stsp struct gotd_imsgev pause;
73 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *connection_limits;
74 40b85cca 2023-01-03 stsp size_t nconnection_limits;
75 d93ecf7d 2022-12-14 stsp } gotd_listen;
77 d93ecf7d 2022-12-14 stsp static int inflight;
79 d93ecf7d 2022-12-14 stsp static void listen_shutdown(void);
82 d93ecf7d 2022-12-14 stsp listen_sighdlr(int sig, short event, void *arg)
85 d93ecf7d 2022-12-14 stsp * Normal signal handler rules don't apply because libevent
86 d93ecf7d 2022-12-14 stsp * decouples for us.
89 d93ecf7d 2022-12-14 stsp switch (sig) {
90 d93ecf7d 2022-12-14 stsp case SIGHUP:
92 d93ecf7d 2022-12-14 stsp case SIGUSR1:
94 d93ecf7d 2022-12-14 stsp case SIGTERM:
95 d93ecf7d 2022-12-14 stsp case SIGINT:
96 d93ecf7d 2022-12-14 stsp listen_shutdown();
97 d93ecf7d 2022-12-14 stsp /* NOTREACHED */
100 d93ecf7d 2022-12-14 stsp fatalx("unexpected signal");
104 d93ecf7d 2022-12-14 stsp static uint64_t
105 d93ecf7d 2022-12-14 stsp client_hash(uint32_t client_id)
107 d93ecf7d 2022-12-14 stsp return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
110 d93ecf7d 2022-12-14 stsp static void
111 d93ecf7d 2022-12-14 stsp add_client(struct gotd_listen_client *client)
113 d93ecf7d 2022-12-14 stsp uint64_t slot = client_hash(client->id) % nitems(gotd_listen_clients);
114 d93ecf7d 2022-12-14 stsp STAILQ_INSERT_HEAD(&gotd_listen_clients[slot], client, entry);
115 d93ecf7d 2022-12-14 stsp listen_client_cnt++;
118 d93ecf7d 2022-12-14 stsp static struct gotd_listen_client *
119 d93ecf7d 2022-12-14 stsp find_client(uint32_t client_id)
121 d93ecf7d 2022-12-14 stsp uint64_t slot;
122 d93ecf7d 2022-12-14 stsp struct gotd_listen_client *c;
124 d93ecf7d 2022-12-14 stsp slot = client_hash(client_id) % nitems(gotd_listen_clients);
125 d93ecf7d 2022-12-14 stsp STAILQ_FOREACH(c, &gotd_listen_clients[slot], entry) {
126 d93ecf7d 2022-12-14 stsp if (c->id == client_id)
130 d93ecf7d 2022-12-14 stsp return NULL;
133 d93ecf7d 2022-12-14 stsp static uint32_t
134 d93ecf7d 2022-12-14 stsp get_client_id(void)
136 d93ecf7d 2022-12-14 stsp int duplicate = 0;
137 d93ecf7d 2022-12-14 stsp uint32_t id;
140 d93ecf7d 2022-12-14 stsp id = arc4random();
141 d93ecf7d 2022-12-14 stsp duplicate = (find_client(id) != NULL);
142 d93ecf7d 2022-12-14 stsp } while (duplicate || id == 0);
147 7a0564e3 2022-12-30 stsp static uint64_t
148 7a0564e3 2022-12-30 stsp uid_hash(uid_t euid)
150 7a0564e3 2022-12-30 stsp return SipHash24(&uid_hash_key, &euid, sizeof(euid));
153 7a0564e3 2022-12-30 stsp static void
154 7a0564e3 2022-12-30 stsp add_uid_connection_counter(struct gotd_uid_connection_counter *counter)
156 7a0564e3 2022-12-30 stsp uint64_t slot = uid_hash(counter->euid) % nitems(gotd_client_uids);
157 7a0564e3 2022-12-30 stsp STAILQ_INSERT_HEAD(&gotd_client_uids[slot], counter, entry);
160 7a0564e3 2022-12-30 stsp static void
161 7a0564e3 2022-12-30 stsp remove_uid_connection_counter(struct gotd_uid_connection_counter *counter)
163 7a0564e3 2022-12-30 stsp uint64_t slot = uid_hash(counter->euid) % nitems(gotd_client_uids);
164 7a0564e3 2022-12-30 stsp STAILQ_REMOVE(&gotd_client_uids[slot], counter,
165 7a0564e3 2022-12-30 stsp gotd_uid_connection_counter, entry);
168 7a0564e3 2022-12-30 stsp static struct gotd_uid_connection_counter *
169 7a0564e3 2022-12-30 stsp find_uid_connection_counter(uid_t euid)
171 7a0564e3 2022-12-30 stsp uint64_t slot;
172 7a0564e3 2022-12-30 stsp struct gotd_uid_connection_counter *c;
174 7a0564e3 2022-12-30 stsp slot = uid_hash(euid) % nitems(gotd_client_uids);
175 7a0564e3 2022-12-30 stsp STAILQ_FOREACH(c, &gotd_client_uids[slot], entry) {
176 7a0564e3 2022-12-30 stsp if (c->euid == euid)
180 40b85cca 2023-01-03 stsp return NULL;
183 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *
184 40b85cca 2023-01-03 stsp gotd_find_uid_connection_limit(struct gotd_uid_connection_limit *limits,
185 40b85cca 2023-01-03 stsp size_t nlimits, uid_t uid)
187 40b85cca 2023-01-03 stsp /* This array is always sorted to allow for binary search. */
188 40b85cca 2023-01-03 stsp int i, left = 0, right = nlimits - 1;
190 40b85cca 2023-01-03 stsp while (left <= right) {
191 40b85cca 2023-01-03 stsp i = ((left + right) / 2);
192 40b85cca 2023-01-03 stsp if (limits[i].uid == uid)
193 40b85cca 2023-01-03 stsp return &limits[i];
194 40b85cca 2023-01-03 stsp if (limits[i].uid > uid)
195 40b85cca 2023-01-03 stsp left = i + 1;
197 40b85cca 2023-01-03 stsp right = i - 1;
200 7a0564e3 2022-12-30 stsp return NULL;
203 d93ecf7d 2022-12-14 stsp static const struct got_error *
204 d93ecf7d 2022-12-14 stsp disconnect(struct gotd_listen_client *client)
206 7a0564e3 2022-12-30 stsp struct gotd_uid_connection_counter *counter;
207 d93ecf7d 2022-12-14 stsp uint64_t slot;
208 d93ecf7d 2022-12-14 stsp int client_fd;
210 d93ecf7d 2022-12-14 stsp log_debug("client on fd %d disconnecting", client->fd);
212 d93ecf7d 2022-12-14 stsp slot = client_hash(client->id) % nitems(gotd_listen_clients);
213 d93ecf7d 2022-12-14 stsp STAILQ_REMOVE(&gotd_listen_clients[slot], client,
214 d93ecf7d 2022-12-14 stsp gotd_listen_client, entry);
216 7a0564e3 2022-12-30 stsp counter = find_uid_connection_counter(client->euid);
217 7a0564e3 2022-12-30 stsp if (counter) {
218 7a0564e3 2022-12-30 stsp if (counter->nconnections > 0)
219 7a0564e3 2022-12-30 stsp counter->nconnections--;
220 7a0564e3 2022-12-30 stsp if (counter->nconnections == 0) {
221 7a0564e3 2022-12-30 stsp remove_uid_connection_counter(counter);
222 7a0564e3 2022-12-30 stsp free(counter);
226 d93ecf7d 2022-12-14 stsp client_fd = client->fd;
227 d93ecf7d 2022-12-14 stsp free(client);
228 d93ecf7d 2022-12-14 stsp inflight--;
229 d93ecf7d 2022-12-14 stsp listen_client_cnt--;
230 d93ecf7d 2022-12-14 stsp if (close(client_fd) == -1)
231 d93ecf7d 2022-12-14 stsp return got_error_from_errno("close");
233 d93ecf7d 2022-12-14 stsp return NULL;
237 d93ecf7d 2022-12-14 stsp accept_reserve(int fd, struct sockaddr *addr, socklen_t *addrlen,
238 d93ecf7d 2022-12-14 stsp int reserve, volatile int *counter)
242 d93ecf7d 2022-12-14 stsp if (getdtablecount() + reserve +
243 d93ecf7d 2022-12-14 stsp ((*counter + 1) * GOTD_FD_NEEDED) >= getdtablesize()) {
244 d93ecf7d 2022-12-14 stsp log_debug("inflight fds exceeded");
245 d93ecf7d 2022-12-14 stsp errno = EMFILE;
249 d93ecf7d 2022-12-14 stsp if ((ret = accept4(fd, addr, addrlen,
250 d93ecf7d 2022-12-14 stsp SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
251 d93ecf7d 2022-12-14 stsp (*counter)++;
254 d93ecf7d 2022-12-14 stsp return ret;
257 d93ecf7d 2022-12-14 stsp static void
258 d93ecf7d 2022-12-14 stsp gotd_accept_paused(int fd, short event, void *arg)
260 d93ecf7d 2022-12-14 stsp event_add(&gotd_listen.iev.ev, NULL);
263 d93ecf7d 2022-12-14 stsp static void
264 d93ecf7d 2022-12-14 stsp gotd_accept(int fd, short event, void *arg)
266 d93ecf7d 2022-12-14 stsp struct gotd_imsgev *iev = arg;
267 d93ecf7d 2022-12-14 stsp struct sockaddr_storage ss;
268 d93ecf7d 2022-12-14 stsp struct timeval backoff;
269 d93ecf7d 2022-12-14 stsp socklen_t len;
270 d93ecf7d 2022-12-14 stsp int s = -1;
271 d93ecf7d 2022-12-14 stsp struct gotd_listen_client *client = NULL;
272 7a0564e3 2022-12-30 stsp struct gotd_uid_connection_counter *counter = NULL;
273 d93ecf7d 2022-12-14 stsp struct gotd_imsg_connect iconn;
274 365cf0f3 2022-12-29 stsp uid_t euid;
275 365cf0f3 2022-12-29 stsp gid_t egid;
277 d93ecf7d 2022-12-14 stsp backoff.tv_sec = 1;
278 d93ecf7d 2022-12-14 stsp backoff.tv_usec = 0;
280 d93ecf7d 2022-12-14 stsp if (event_add(&gotd_listen.iev.ev, NULL) == -1) {
281 d93ecf7d 2022-12-14 stsp log_warn("event_add");
284 d93ecf7d 2022-12-14 stsp if (event & EV_TIMEOUT)
287 d93ecf7d 2022-12-14 stsp len = sizeof(ss);
289 d93ecf7d 2022-12-14 stsp /* Other backoff conditions apart from EMFILE/ENFILE? */
290 d93ecf7d 2022-12-14 stsp s = accept_reserve(fd, (struct sockaddr *)&ss, &len, GOTD_FD_RESERVE,
291 d93ecf7d 2022-12-14 stsp &inflight);
292 d93ecf7d 2022-12-14 stsp if (s == -1) {
293 d93ecf7d 2022-12-14 stsp switch (errno) {
294 d93ecf7d 2022-12-14 stsp case EINTR:
295 d93ecf7d 2022-12-14 stsp case EWOULDBLOCK:
296 d93ecf7d 2022-12-14 stsp case ECONNABORTED:
298 d93ecf7d 2022-12-14 stsp case EMFILE:
299 d93ecf7d 2022-12-14 stsp case ENFILE:
300 d93ecf7d 2022-12-14 stsp event_del(&gotd_listen.iev.ev);
301 d93ecf7d 2022-12-14 stsp evtimer_add(&gotd_listen.pause.ev, &backoff);
304 d93ecf7d 2022-12-14 stsp log_warn("accept");
309 d93ecf7d 2022-12-14 stsp if (listen_client_cnt >= GOTD_MAXCLIENTS)
312 365cf0f3 2022-12-29 stsp if (getpeereid(s, &euid, &egid) == -1) {
313 365cf0f3 2022-12-29 stsp log_warn("getpeerid");
317 7a0564e3 2022-12-30 stsp counter = find_uid_connection_counter(euid);
318 7a0564e3 2022-12-30 stsp if (counter == NULL) {
319 7a0564e3 2022-12-30 stsp counter = calloc(1, sizeof(*counter));
320 7a0564e3 2022-12-30 stsp if (counter == NULL) {
321 7a0564e3 2022-12-30 stsp log_warn("%s: calloc", __func__);
324 7a0564e3 2022-12-30 stsp counter->euid = euid;
325 7a0564e3 2022-12-30 stsp counter->nconnections = 1;
326 7a0564e3 2022-12-30 stsp add_uid_connection_counter(counter);
328 40b85cca 2023-01-03 stsp int max_connections = GOTD_MAX_CONN_PER_UID;
329 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *limit;
331 40b85cca 2023-01-03 stsp limit = gotd_find_uid_connection_limit(
332 40b85cca 2023-01-03 stsp gotd_listen.connection_limits,
333 40b85cca 2023-01-03 stsp gotd_listen.nconnection_limits, euid);
335 40b85cca 2023-01-03 stsp max_connections = limit->max_connections;
337 40b85cca 2023-01-03 stsp if (counter->nconnections >= max_connections) {
338 7a0564e3 2022-12-30 stsp log_warnx("maximum connections exceeded for uid %d",
342 7a0564e3 2022-12-30 stsp counter->nconnections++;
345 d93ecf7d 2022-12-14 stsp client = calloc(1, sizeof(*client));
346 d93ecf7d 2022-12-14 stsp if (client == NULL) {
347 d93ecf7d 2022-12-14 stsp log_warn("%s: calloc", __func__);
350 d93ecf7d 2022-12-14 stsp client->id = get_client_id();
351 d93ecf7d 2022-12-14 stsp client->fd = s;
352 7a0564e3 2022-12-30 stsp client->euid = euid;
354 d93ecf7d 2022-12-14 stsp add_client(client);
355 365cf0f3 2022-12-29 stsp log_debug("%s: new client connected on fd %d uid %d gid %d", __func__,
356 365cf0f3 2022-12-29 stsp client->fd, euid, egid);
358 d93ecf7d 2022-12-14 stsp memset(&iconn, 0, sizeof(iconn));
359 d93ecf7d 2022-12-14 stsp iconn.client_id = client->id;
360 365cf0f3 2022-12-29 stsp iconn.euid = euid;
361 365cf0f3 2022-12-29 stsp iconn.egid = egid;
362 d93ecf7d 2022-12-14 stsp s = dup(client->fd);
363 d93ecf7d 2022-12-14 stsp if (s == -1) {
364 d93ecf7d 2022-12-14 stsp log_warn("%s: dup", __func__);
367 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_CONNECT, PROC_LISTEN, s,
368 d93ecf7d 2022-12-14 stsp &iconn, sizeof(iconn)) == -1) {
369 d93ecf7d 2022-12-14 stsp log_warn("imsg compose CONNECT");
375 d93ecf7d 2022-12-14 stsp inflight--;
376 d93ecf7d 2022-12-14 stsp if (client)
377 d93ecf7d 2022-12-14 stsp disconnect(client);
378 d93ecf7d 2022-12-14 stsp if (s != -1)
382 d93ecf7d 2022-12-14 stsp static const struct got_error *
383 d93ecf7d 2022-12-14 stsp recv_disconnect(struct imsg *imsg)
385 d93ecf7d 2022-12-14 stsp struct gotd_imsg_disconnect idisconnect;
386 d93ecf7d 2022-12-14 stsp size_t datalen;
387 d93ecf7d 2022-12-14 stsp struct gotd_listen_client *client = NULL;
389 d93ecf7d 2022-12-14 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
390 d93ecf7d 2022-12-14 stsp if (datalen != sizeof(idisconnect))
391 d93ecf7d 2022-12-14 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
392 d93ecf7d 2022-12-14 stsp memcpy(&idisconnect, imsg->data, sizeof(idisconnect));
394 d93ecf7d 2022-12-14 stsp log_debug("client disconnecting");
396 d93ecf7d 2022-12-14 stsp client = find_client(idisconnect.client_id);
397 d93ecf7d 2022-12-14 stsp if (client == NULL)
398 d93ecf7d 2022-12-14 stsp return got_error(GOT_ERR_CLIENT_ID);
400 d93ecf7d 2022-12-14 stsp return disconnect(client);
403 d93ecf7d 2022-12-14 stsp static void
404 d93ecf7d 2022-12-14 stsp listen_dispatch(int fd, short event, void *arg)
406 d93ecf7d 2022-12-14 stsp const struct got_error *err = NULL;
407 d93ecf7d 2022-12-14 stsp struct gotd_imsgev *iev = arg;
408 d93ecf7d 2022-12-14 stsp struct imsgbuf *ibuf = &iev->ibuf;
409 d93ecf7d 2022-12-14 stsp struct imsg imsg;
411 d93ecf7d 2022-12-14 stsp int shut = 0;
413 d93ecf7d 2022-12-14 stsp if (event & EV_READ) {
414 d93ecf7d 2022-12-14 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
415 d93ecf7d 2022-12-14 stsp fatal("imsg_read error");
416 d93ecf7d 2022-12-14 stsp if (n == 0) /* Connection closed. */
420 d93ecf7d 2022-12-14 stsp if (event & EV_WRITE) {
421 d93ecf7d 2022-12-14 stsp n = msgbuf_write(&ibuf->w);
422 d93ecf7d 2022-12-14 stsp if (n == -1 && errno != EAGAIN)
423 d93ecf7d 2022-12-14 stsp fatal("msgbuf_write");
424 d93ecf7d 2022-12-14 stsp if (n == 0) /* Connection closed. */
429 d93ecf7d 2022-12-14 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
430 d93ecf7d 2022-12-14 stsp fatal("%s: imsg_get", __func__);
431 d93ecf7d 2022-12-14 stsp if (n == 0) /* No more messages. */
434 d93ecf7d 2022-12-14 stsp switch (imsg.hdr.type) {
435 d93ecf7d 2022-12-14 stsp case GOTD_IMSG_DISCONNECT:
436 d93ecf7d 2022-12-14 stsp err = recv_disconnect(&imsg);
438 d93ecf7d 2022-12-14 stsp log_warnx("%s: disconnect: %s",
439 d93ecf7d 2022-12-14 stsp gotd_listen.title, err->msg);
442 d93ecf7d 2022-12-14 stsp log_debug("%s: unexpected imsg %d", gotd_listen.title,
443 d93ecf7d 2022-12-14 stsp imsg.hdr.type);
447 d93ecf7d 2022-12-14 stsp imsg_free(&imsg);
450 d93ecf7d 2022-12-14 stsp if (!shut) {
451 d93ecf7d 2022-12-14 stsp gotd_imsg_event_add(iev);
453 d93ecf7d 2022-12-14 stsp /* This pipe is dead. Remove its event handler */
454 d93ecf7d 2022-12-14 stsp event_del(&iev->ev);
455 d93ecf7d 2022-12-14 stsp event_loopexit(NULL);
460 40b85cca 2023-01-03 stsp listen_main(const char *title, int gotd_socket,
461 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *connection_limits,
462 40b85cca 2023-01-03 stsp size_t nconnection_limits)
464 d93ecf7d 2022-12-14 stsp struct gotd_imsgev iev;
465 d93ecf7d 2022-12-14 stsp struct event evsigint, evsigterm, evsighup, evsigusr1;
467 c602198a 2022-12-30 stsp arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
468 7a0564e3 2022-12-30 stsp arc4random_buf(&uid_hash_key, sizeof(uid_hash_key));
470 d93ecf7d 2022-12-14 stsp gotd_listen.title = title;
471 d93ecf7d 2022-12-14 stsp gotd_listen.pid = getpid();
472 d93ecf7d 2022-12-14 stsp gotd_listen.fd = gotd_socket;
473 40b85cca 2023-01-03 stsp gotd_listen.connection_limits = connection_limits;
474 40b85cca 2023-01-03 stsp gotd_listen.nconnection_limits = nconnection_limits;
476 d93ecf7d 2022-12-14 stsp signal_set(&evsigint, SIGINT, listen_sighdlr, NULL);
477 d93ecf7d 2022-12-14 stsp signal_set(&evsigterm, SIGTERM, listen_sighdlr, NULL);
478 d93ecf7d 2022-12-14 stsp signal_set(&evsighup, SIGHUP, listen_sighdlr, NULL);
479 d93ecf7d 2022-12-14 stsp signal_set(&evsigusr1, SIGUSR1, listen_sighdlr, NULL);
480 d93ecf7d 2022-12-14 stsp signal(SIGPIPE, SIG_IGN);
482 d93ecf7d 2022-12-14 stsp signal_add(&evsigint, NULL);
483 d93ecf7d 2022-12-14 stsp signal_add(&evsigterm, NULL);
484 d93ecf7d 2022-12-14 stsp signal_add(&evsighup, NULL);
485 d93ecf7d 2022-12-14 stsp signal_add(&evsigusr1, NULL);
487 d93ecf7d 2022-12-14 stsp imsg_init(&iev.ibuf, GOTD_FILENO_MSG_PIPE);
488 d93ecf7d 2022-12-14 stsp iev.handler = listen_dispatch;
489 d93ecf7d 2022-12-14 stsp iev.events = EV_READ;
490 d93ecf7d 2022-12-14 stsp iev.handler_arg = NULL;
491 d93ecf7d 2022-12-14 stsp event_set(&iev.ev, iev.ibuf.fd, EV_READ, listen_dispatch, &iev);
492 d93ecf7d 2022-12-14 stsp if (event_add(&iev.ev, NULL) == -1)
493 d93ecf7d 2022-12-14 stsp fatalx("event add");
495 d93ecf7d 2022-12-14 stsp event_set(&gotd_listen.iev.ev, gotd_listen.fd, EV_READ | EV_PERSIST,
496 d93ecf7d 2022-12-14 stsp gotd_accept, &iev);
497 d93ecf7d 2022-12-14 stsp if (event_add(&gotd_listen.iev.ev, NULL))
498 d93ecf7d 2022-12-14 stsp fatalx("event add");
499 d93ecf7d 2022-12-14 stsp evtimer_set(&gotd_listen.pause.ev, gotd_accept_paused, NULL);
501 d93ecf7d 2022-12-14 stsp event_dispatch();
503 d93ecf7d 2022-12-14 stsp listen_shutdown();
506 d93ecf7d 2022-12-14 stsp static void
507 d93ecf7d 2022-12-14 stsp listen_shutdown(void)
509 d93ecf7d 2022-12-14 stsp log_debug("%s: shutting down", gotd_listen.title);
511 40b85cca 2023-01-03 stsp free(gotd_listen.connection_limits);
512 d93ecf7d 2022-12-14 stsp if (gotd_listen.fd != -1)
513 d93ecf7d 2022-12-14 stsp close(gotd_listen.fd);
