2 13b2bc37 2022-10-23 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 13b2bc37 2022-10-23 stsp * Permission to use, copy, modify, and distribute this software for any
5 13b2bc37 2022-10-23 stsp * purpose with or without fee is hereby granted, provided that the above
6 13b2bc37 2022-10-23 stsp * copyright notice and this permission notice appear in all copies.
8 13b2bc37 2022-10-23 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 13b2bc37 2022-10-23 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 13b2bc37 2022-10-23 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 13b2bc37 2022-10-23 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 13b2bc37 2022-10-23 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 13b2bc37 2022-10-23 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 13b2bc37 2022-10-23 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
18 13b2bc37 2022-10-23 stsp #include <sys/tree.h>
19 13b2bc37 2022-10-23 stsp #include <sys/time.h>
20 13b2bc37 2022-10-23 stsp #include <sys/types.h>
21 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
22 13b2bc37 2022-10-23 stsp #include <sys/socket.h>
23 13b2bc37 2022-10-23 stsp #include <sys/un.h>
24 13b2bc37 2022-10-23 stsp #include <sys/wait.h>
25 abe89edb 2023-11-16 stsp #include <sys/resource.h>
27 13b2bc37 2022-10-23 stsp #include <fcntl.h>
28 13b2bc37 2022-10-23 stsp #include <err.h>
29 13b2bc37 2022-10-23 stsp #include <errno.h>
30 13b2bc37 2022-10-23 stsp #include <event.h>
31 13b2bc37 2022-10-23 stsp #include <limits.h>
32 13b2bc37 2022-10-23 stsp #include <pwd.h>
33 13b2bc37 2022-10-23 stsp #include <imsg.h>
34 13b2bc37 2022-10-23 stsp #include <sha1.h>
35 5822e79e 2023-02-23 op #include <sha2.h>
36 13b2bc37 2022-10-23 stsp #include <signal.h>
37 13b2bc37 2022-10-23 stsp #include <siphash.h>
38 13b2bc37 2022-10-23 stsp #include <stdarg.h>
39 13b2bc37 2022-10-23 stsp #include <stdio.h>
40 13b2bc37 2022-10-23 stsp #include <stdlib.h>
41 13b2bc37 2022-10-23 stsp #include <string.h>
42 13b2bc37 2022-10-23 stsp #include <syslog.h>
43 13b2bc37 2022-10-23 stsp #include <unistd.h>
45 13b2bc37 2022-10-23 stsp #include "got_error.h"
46 13b2bc37 2022-10-23 stsp #include "got_opentemp.h"
47 13b2bc37 2022-10-23 stsp #include "got_path.h"
48 13b2bc37 2022-10-23 stsp #include "got_repository.h"
49 13b2bc37 2022-10-23 stsp #include "got_object.h"
50 13b2bc37 2022-10-23 stsp #include "got_reference.h"
52 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
53 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
54 13b2bc37 2022-10-23 stsp #include "got_lib_object_cache.h"
55 53bf0b54 2023-02-23 op #include "got_lib_hash.h"
56 13b2bc37 2022-10-23 stsp #include "got_lib_gitproto.h"
57 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
58 13b2bc37 2022-10-23 stsp #include "got_lib_repository.h"
60 13b2bc37 2022-10-23 stsp #include "gotd.h"
61 13b2bc37 2022-10-23 stsp #include "log.h"
62 d93ecf7d 2022-12-14 stsp #include "listen.h"
63 0ccf3acb 2022-11-16 stsp #include "auth.h"
64 ae7c1b78 2023-01-10 stsp #include "session.h"
65 13b2bc37 2022-10-23 stsp #include "repo_read.h"
66 13b2bc37 2022-10-23 stsp #include "repo_write.h"
68 13b2bc37 2022-10-23 stsp #ifndef nitems
69 13b2bc37 2022-10-23 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
72 eac23c30 2023-01-10 stsp enum gotd_client_state {
73 eac23c30 2023-01-10 stsp GOTD_CLIENT_STATE_NEW,
74 eac23c30 2023-01-10 stsp GOTD_CLIENT_STATE_ACCESS_GRANTED,
77 c929736a 2023-06-22 op struct gotd_child_proc {
79 c929736a 2023-06-22 op enum gotd_procid type;
80 c929736a 2023-06-22 op char repo_name[NAME_MAX];
81 c929736a 2023-06-22 op char repo_path[PATH_MAX];
83 c929736a 2023-06-22 op struct gotd_imsgev iev;
84 839338f6 2023-06-22 op struct event tmo;
86 839338f6 2023-06-22 op TAILQ_ENTRY(gotd_child_proc) entry;
88 839338f6 2023-06-22 op TAILQ_HEAD(gotd_procs, gotd_child_proc) procs;
90 13b2bc37 2022-10-23 stsp struct gotd_client {
91 13b2bc37 2022-10-23 stsp STAILQ_ENTRY(gotd_client) entry;
92 13b2bc37 2022-10-23 stsp enum gotd_client_state state;
93 13b2bc37 2022-10-23 stsp uint32_t id;
95 13b2bc37 2022-10-23 stsp struct gotd_imsgev iev;
96 13b2bc37 2022-10-23 stsp struct event tmo;
99 56624d2b 2023-12-27 stsp char *username;
100 f7a854cf 2023-01-10 stsp struct gotd_child_proc *repo;
101 5e25db14 2022-12-29 stsp struct gotd_child_proc *auth;
102 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *session;
103 5e25db14 2022-12-29 stsp int required_auth;
105 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_clients, gotd_client);
107 13b2bc37 2022-10-23 stsp static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
108 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
109 13b2bc37 2022-10-23 stsp volatile int client_cnt;
110 ef4e2f01 2022-12-29 stsp static struct timeval auth_timeout = { 5, 0 };
111 13b2bc37 2022-10-23 stsp static struct gotd gotd;
113 13b2bc37 2022-10-23 stsp void gotd_sighdlr(int sig, short event, void *arg);
114 f1752522 2022-10-29 stsp static void gotd_shutdown(void);
115 ae7c1b78 2023-01-10 stsp static const struct got_error *start_session_child(struct gotd_client *,
116 ae7c1b78 2023-01-10 stsp struct gotd_repo *, char *, const char *, int, int);
117 b50a2b46 2022-12-29 stsp static const struct got_error *start_repo_child(struct gotd_client *,
118 b50a2b46 2022-12-29 stsp enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
119 5e25db14 2022-12-29 stsp static const struct got_error *start_auth_child(struct gotd_client *, int,
120 5e25db14 2022-12-29 stsp struct gotd_repo *, char *, const char *, int, int);
121 b50a2b46 2022-12-29 stsp static void kill_proc(struct gotd_child_proc *, int);
122 839338f6 2023-06-22 op static void disconnect(struct gotd_client *);
124 13b2bc37 2022-10-23 stsp __dead static void
127 e9e01966 2023-01-18 stsp fprintf(stderr, "usage: %s [-dnv] [-f config-file]\n", getprogname());
132 13b2bc37 2022-10-23 stsp unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
134 13b2bc37 2022-10-23 stsp struct sockaddr_un sun;
135 13b2bc37 2022-10-23 stsp int fd = -1;
136 13b2bc37 2022-10-23 stsp mode_t old_umask, mode;
138 13b2bc37 2022-10-23 stsp fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
139 13b2bc37 2022-10-23 stsp if (fd == -1) {
140 13b2bc37 2022-10-23 stsp log_warn("socket");
144 13b2bc37 2022-10-23 stsp sun.sun_family = AF_UNIX;
145 13b2bc37 2022-10-23 stsp if (strlcpy(sun.sun_path, unix_socket_path,
146 13b2bc37 2022-10-23 stsp sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
147 13b2bc37 2022-10-23 stsp log_warnx("%s: name too long", unix_socket_path);
152 13b2bc37 2022-10-23 stsp if (unlink(unix_socket_path) == -1) {
153 13b2bc37 2022-10-23 stsp if (errno != ENOENT) {
154 13b2bc37 2022-10-23 stsp log_warn("unlink %s", unix_socket_path);
160 13b2bc37 2022-10-23 stsp old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
161 6f854dde 2023-01-04 stsp mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
163 13b2bc37 2022-10-23 stsp if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
164 13b2bc37 2022-10-23 stsp log_warn("bind: %s", unix_socket_path);
166 13b2bc37 2022-10-23 stsp umask(old_umask);
170 13b2bc37 2022-10-23 stsp umask(old_umask);
172 13b2bc37 2022-10-23 stsp if (chmod(unix_socket_path, mode) == -1) {
173 13b2bc37 2022-10-23 stsp log_warn("chmod %o %s", mode, unix_socket_path);
175 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
179 13b2bc37 2022-10-23 stsp if (chown(unix_socket_path, uid, gid) == -1) {
180 13b2bc37 2022-10-23 stsp log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
182 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
186 13b2bc37 2022-10-23 stsp if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
187 13b2bc37 2022-10-23 stsp log_warn("listen");
189 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
196 13b2bc37 2022-10-23 stsp static uint64_t
197 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
199 13b2bc37 2022-10-23 stsp return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
202 13b2bc37 2022-10-23 stsp static void
203 13b2bc37 2022-10-23 stsp add_client(struct gotd_client *client)
205 13b2bc37 2022-10-23 stsp uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
206 13b2bc37 2022-10-23 stsp STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
207 13b2bc37 2022-10-23 stsp client_cnt++;
210 13b2bc37 2022-10-23 stsp static struct gotd_client *
211 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
213 13b2bc37 2022-10-23 stsp uint64_t slot;
214 13b2bc37 2022-10-23 stsp struct gotd_client *c;
216 13b2bc37 2022-10-23 stsp slot = client_hash(client_id) % nitems(gotd_clients);
217 13b2bc37 2022-10-23 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
218 13b2bc37 2022-10-23 stsp if (c->id == client_id)
222 13b2bc37 2022-10-23 stsp return NULL;
225 b50a2b46 2022-12-29 stsp static struct gotd_client *
226 b50a2b46 2022-12-29 stsp find_client_by_proc_fd(int fd)
228 b50a2b46 2022-12-29 stsp uint64_t slot;
230 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
231 b50a2b46 2022-12-29 stsp struct gotd_client *c;
233 b50a2b46 2022-12-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
234 f7a854cf 2023-01-10 stsp if (c->repo && c->repo->iev.ibuf.fd == fd)
236 5e25db14 2022-12-29 stsp if (c->auth && c->auth->iev.ibuf.fd == fd)
238 ae7c1b78 2023-01-10 stsp if (c->session && c->session->iev.ibuf.fd == fd)
243 13b2bc37 2022-10-23 stsp return NULL;
247 13b2bc37 2022-10-23 stsp client_is_reading(struct gotd_client *client)
249 f7a854cf 2023-01-10 stsp return (client->required_auth &
250 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE)) == GOTD_AUTH_READ;
254 13b2bc37 2022-10-23 stsp client_is_writing(struct gotd_client *client)
256 f7a854cf 2023-01-10 stsp return (client->required_auth &
257 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE)) ==
258 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE);
261 13b2bc37 2022-10-23 stsp static const struct got_error *
262 13b2bc37 2022-10-23 stsp ensure_client_is_not_writing(struct gotd_client *client)
264 13b2bc37 2022-10-23 stsp if (client_is_writing(client)) {
265 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
266 13b2bc37 2022-10-23 stsp "uid %d made a read-request but is writing to "
267 13b2bc37 2022-10-23 stsp "a repository", client->euid);
270 13b2bc37 2022-10-23 stsp return NULL;
273 13b2bc37 2022-10-23 stsp static const struct got_error *
274 13b2bc37 2022-10-23 stsp ensure_client_is_not_reading(struct gotd_client *client)
276 13b2bc37 2022-10-23 stsp if (client_is_reading(client)) {
277 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
278 13b2bc37 2022-10-23 stsp "uid %d made a write-request but is reading from "
279 13b2bc37 2022-10-23 stsp "a repository", client->euid);
282 13b2bc37 2022-10-23 stsp return NULL;
285 b50a2b46 2022-12-29 stsp static void
286 839338f6 2023-06-22 op proc_done(struct gotd_child_proc *proc)
288 839338f6 2023-06-22 op struct gotd_client *client;
290 839338f6 2023-06-22 op TAILQ_REMOVE(&procs, proc, entry);
292 839338f6 2023-06-22 op client = find_client_by_proc_fd(proc->iev.ibuf.fd);
293 839338f6 2023-06-22 op if (client != NULL) {
294 839338f6 2023-06-22 op if (proc == client->repo)
295 839338f6 2023-06-22 op client->repo = NULL;
296 839338f6 2023-06-22 op if (proc == client->auth)
297 839338f6 2023-06-22 op client->auth = NULL;
298 839338f6 2023-06-22 op if (proc == client->session)
299 839338f6 2023-06-22 op client->session = NULL;
300 839338f6 2023-06-22 op disconnect(client);
303 839338f6 2023-06-22 op evtimer_del(&proc->tmo);
305 839338f6 2023-06-22 op if (proc->iev.ibuf.fd != -1) {
306 839338f6 2023-06-22 op event_del(&proc->iev.ev);
307 839338f6 2023-06-22 op msgbuf_clear(&proc->iev.ibuf.w);
308 839338f6 2023-06-22 op close(proc->iev.ibuf.fd);
311 ae7c1b78 2023-01-10 stsp free(proc);
315 ba91039c 2023-06-22 op kill_repo_proc(struct gotd_client *client)
317 ba91039c 2023-06-22 op if (client->repo == NULL)
320 839338f6 2023-06-22 op kill_proc(client->repo, 0);
321 ba91039c 2023-06-22 op client->repo = NULL;
324 13b2bc37 2022-10-23 stsp static void
325 5e25db14 2022-12-29 stsp kill_auth_proc(struct gotd_client *client)
327 5e25db14 2022-12-29 stsp if (client->auth == NULL)
330 839338f6 2023-06-22 op kill_proc(client->auth, 0);
331 5e25db14 2022-12-29 stsp client->auth = NULL;
334 5e25db14 2022-12-29 stsp static void
335 ae7c1b78 2023-01-10 stsp kill_session_proc(struct gotd_client *client)
337 ae7c1b78 2023-01-10 stsp if (client->session == NULL)
340 839338f6 2023-06-22 op kill_proc(client->session, 0);
341 ae7c1b78 2023-01-10 stsp client->session = NULL;
344 ae7c1b78 2023-01-10 stsp static void
345 13b2bc37 2022-10-23 stsp disconnect(struct gotd_client *client)
347 13b2bc37 2022-10-23 stsp struct gotd_imsg_disconnect idisconnect;
348 c929736a 2023-06-22 op struct gotd_child_proc *listen_proc = gotd.listen_proc;
349 13b2bc37 2022-10-23 stsp uint64_t slot;
351 13b2bc37 2022-10-23 stsp log_debug("uid %d: disconnecting", client->euid);
353 5e25db14 2022-12-29 stsp kill_auth_proc(client);
354 ae7c1b78 2023-01-10 stsp kill_session_proc(client);
355 ba91039c 2023-06-22 op kill_repo_proc(client);
357 90270f79 2023-02-09 stsp idisconnect.client_id = client->id;
358 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
359 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
360 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
361 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
363 13b2bc37 2022-10-23 stsp slot = client_hash(client->id) % nitems(gotd_clients);
364 13b2bc37 2022-10-23 stsp STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
365 13b2bc37 2022-10-23 stsp imsg_clear(&client->iev.ibuf);
366 13b2bc37 2022-10-23 stsp event_del(&client->iev.ev);
367 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
368 ae7c1b78 2023-01-10 stsp if (client->fd != -1)
369 ae7c1b78 2023-01-10 stsp close(client->fd);
370 ae7c1b78 2023-01-10 stsp else if (client->iev.ibuf.fd != -1)
371 ae7c1b78 2023-01-10 stsp close(client->iev.ibuf.fd);
372 56624d2b 2023-12-27 stsp free(client->username);
373 13b2bc37 2022-10-23 stsp free(client);
374 13b2bc37 2022-10-23 stsp client_cnt--;
377 13b2bc37 2022-10-23 stsp static void
378 13b2bc37 2022-10-23 stsp disconnect_on_error(struct gotd_client *client, const struct got_error *err)
380 13b2bc37 2022-10-23 stsp struct imsgbuf ibuf;
382 1050403b 2023-08-11 stsp if (err->code != GOT_ERR_EOF) {
383 1050403b 2023-08-11 stsp log_warnx("uid %d: %s", client->euid, err->msg);
384 1050403b 2023-08-11 stsp if (client->fd != -1) {
385 1050403b 2023-08-11 stsp imsg_init(&ibuf, client->fd);
386 1050403b 2023-08-11 stsp gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
387 1050403b 2023-08-11 stsp imsg_clear(&ibuf);
390 13b2bc37 2022-10-23 stsp disconnect(client);
393 f1752522 2022-10-29 stsp static const struct got_error *
394 f1752522 2022-10-29 stsp send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
396 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
397 f1752522 2022-10-29 stsp struct gotd_imsg_info_repo irepo;
399 f1752522 2022-10-29 stsp memset(&irepo, 0, sizeof(irepo));
401 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
402 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_name))
403 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
404 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
405 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_path))
406 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
408 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
409 f1752522 2022-10-29 stsp &irepo, sizeof(irepo)) == -1) {
410 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_REPO");
412 f1752522 2022-10-29 stsp return err;
415 f1752522 2022-10-29 stsp return NULL;
418 f1752522 2022-10-29 stsp static const struct got_error *
419 f1752522 2022-10-29 stsp send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
421 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
422 f1752522 2022-10-29 stsp struct gotd_imsg_info_client iclient;
423 f1752522 2022-10-29 stsp struct gotd_child_proc *proc;
425 f1752522 2022-10-29 stsp memset(&iclient, 0, sizeof(iclient));
426 f1752522 2022-10-29 stsp iclient.euid = client->euid;
427 f1752522 2022-10-29 stsp iclient.egid = client->egid;
429 f7a854cf 2023-01-10 stsp proc = client->repo;
430 f1752522 2022-10-29 stsp if (proc) {
431 eec68231 2022-12-14 stsp if (strlcpy(iclient.repo_name, proc->repo_path,
432 f1752522 2022-10-29 stsp sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
433 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE,
434 f1752522 2022-10-29 stsp "repo name too long");
436 f1752522 2022-10-29 stsp if (client_is_writing(client))
437 f1752522 2022-10-29 stsp iclient.is_writing = 1;
439 ae7c1b78 2023-01-10 stsp iclient.repo_child_pid = proc->pid;
442 ae7c1b78 2023-01-10 stsp if (client->session)
443 ae7c1b78 2023-01-10 stsp iclient.session_child_pid = client->session->pid;
445 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
446 f1752522 2022-10-29 stsp &iclient, sizeof(iclient)) == -1) {
447 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_CLIENT");
449 f1752522 2022-10-29 stsp return err;
452 f1752522 2022-10-29 stsp return NULL;
455 f1752522 2022-10-29 stsp static const struct got_error *
456 f1752522 2022-10-29 stsp send_info(struct gotd_client *client)
458 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
459 f1752522 2022-10-29 stsp struct gotd_imsg_info info;
460 f1752522 2022-10-29 stsp uint64_t slot;
461 f1752522 2022-10-29 stsp struct gotd_repo *repo;
463 78433331 2023-01-04 stsp if (client->euid != 0)
464 78433331 2023-01-04 stsp return got_error_set_errno(EPERM, "info");
466 f1752522 2022-10-29 stsp info.pid = gotd.pid;
467 f1752522 2022-10-29 stsp info.verbosity = gotd.verbosity;
468 f1752522 2022-10-29 stsp info.nrepos = gotd.nrepos;
469 f1752522 2022-10-29 stsp info.nclients = client_cnt - 1;
471 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
472 f1752522 2022-10-29 stsp &info, sizeof(info)) == -1) {
473 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO");
475 f1752522 2022-10-29 stsp return err;
478 f1752522 2022-10-29 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
479 f1752522 2022-10-29 stsp err = send_repo_info(&client->iev, repo);
481 f1752522 2022-10-29 stsp return err;
484 f1752522 2022-10-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
485 f1752522 2022-10-29 stsp struct gotd_client *c;
486 f1752522 2022-10-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
487 f1752522 2022-10-29 stsp if (c->id == client->id)
489 f1752522 2022-10-29 stsp err = send_client_info(&client->iev, c);
491 f1752522 2022-10-29 stsp return err;
495 f1752522 2022-10-29 stsp return NULL;
498 f1752522 2022-10-29 stsp static const struct got_error *
499 f1752522 2022-10-29 stsp stop_gotd(struct gotd_client *client)
502 f1752522 2022-10-29 stsp if (client->euid != 0)
503 f1752522 2022-10-29 stsp return got_error_set_errno(EPERM, "stop");
505 f1752522 2022-10-29 stsp gotd_shutdown();
506 f1752522 2022-10-29 stsp /* NOTREACHED */
507 0ccf3acb 2022-11-16 stsp return NULL;
510 13b2bc37 2022-10-23 stsp static const struct got_error *
511 ae7c1b78 2023-01-10 stsp start_client_authentication(struct gotd_client *client, struct imsg *imsg)
513 13b2bc37 2022-10-23 stsp const struct got_error *err;
514 13b2bc37 2022-10-23 stsp struct gotd_imsg_list_refs ireq;
515 0ccf3acb 2022-11-16 stsp struct gotd_repo *repo = NULL;
516 13b2bc37 2022-10-23 stsp size_t datalen;
518 13b2bc37 2022-10-23 stsp log_debug("list-refs request from uid %d", client->euid);
520 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_NEW)
521 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
522 ae7c1b78 2023-01-10 stsp "unexpected list-refs request received");
524 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
525 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq))
526 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
528 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, datalen);
530 13b2bc37 2022-10-23 stsp if (ireq.client_is_reading) {
531 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_writing(client);
533 13b2bc37 2022-10-23 stsp return err;
534 b09c1279 2023-03-28 stsp repo = gotd_find_repo_by_name(ireq.repo_name, &gotd);
535 0ccf3acb 2022-11-16 stsp if (repo == NULL)
536 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
537 5e25db14 2022-12-29 stsp err = start_auth_child(client, GOTD_AUTH_READ, repo,
538 b50a2b46 2022-12-29 stsp gotd.argv0, gotd.confpath, gotd.daemonize,
539 b50a2b46 2022-12-29 stsp gotd.verbosity);
541 b50a2b46 2022-12-29 stsp return err;
543 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_reading(client);
545 0ccf3acb 2022-11-16 stsp return err;
546 b09c1279 2023-03-28 stsp repo = gotd_find_repo_by_name(ireq.repo_name, &gotd);
547 0ccf3acb 2022-11-16 stsp if (repo == NULL)
548 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
549 5e25db14 2022-12-29 stsp err = start_auth_child(client,
550 5e25db14 2022-12-29 stsp GOTD_AUTH_READ | GOTD_AUTH_WRITE,
551 5e25db14 2022-12-29 stsp repo, gotd.argv0, gotd.confpath, gotd.daemonize,
552 b50a2b46 2022-12-29 stsp gotd.verbosity);
554 b50a2b46 2022-12-29 stsp return err;
557 ae7c1b78 2023-01-10 stsp evtimer_add(&client->tmo, &auth_timeout);
559 5fb50fce 2023-07-14 stsp /* Flow continues upon authentication success/failure or timeout. */
560 13b2bc37 2022-10-23 stsp return NULL;
563 13b2bc37 2022-10-23 stsp static void
564 13b2bc37 2022-10-23 stsp gotd_request(int fd, short events, void *arg)
566 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
567 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
568 13b2bc37 2022-10-23 stsp struct gotd_client *client = iev->handler_arg;
569 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
570 13b2bc37 2022-10-23 stsp struct imsg imsg;
573 13b2bc37 2022-10-23 stsp if (events & EV_WRITE) {
574 13b2bc37 2022-10-23 stsp while (ibuf->w.queued) {
575 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
576 13b2bc37 2022-10-23 stsp if (n == -1 && errno == EPIPE) {
578 13b2bc37 2022-10-23 stsp * The client has closed its socket.
579 13b2bc37 2022-10-23 stsp * This can happen when Git clients are
580 13b2bc37 2022-10-23 stsp * done sending pack file data.
582 13b2bc37 2022-10-23 stsp msgbuf_clear(&ibuf->w);
584 13b2bc37 2022-10-23 stsp } else if (n == -1 && errno != EAGAIN) {
585 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_flush");
586 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
589 13b2bc37 2022-10-23 stsp if (n == 0) {
590 13b2bc37 2022-10-23 stsp /* Connection closed. */
591 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_EOF);
592 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
597 f1752522 2022-10-29 stsp /* Disconnect gotctl(8) now that messages have been sent. */
598 f1752522 2022-10-29 stsp if (!client_is_reading(client) && !client_is_writing(client)) {
599 f1752522 2022-10-29 stsp disconnect(client);
604 13b2bc37 2022-10-23 stsp if ((events & EV_READ) == 0)
607 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
609 13b2bc37 2022-10-23 stsp while (err == NULL) {
610 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv(&imsg, ibuf, 0);
612 13b2bc37 2022-10-23 stsp if (err->code == GOT_ERR_PRIVSEP_READ)
613 13b2bc37 2022-10-23 stsp err = NULL;
617 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
619 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
620 f1752522 2022-10-29 stsp case GOTD_IMSG_INFO:
621 f1752522 2022-10-29 stsp err = send_info(client);
623 f1752522 2022-10-29 stsp case GOTD_IMSG_STOP:
624 f1752522 2022-10-29 stsp err = stop_gotd(client);
626 13b2bc37 2022-10-23 stsp case GOTD_IMSG_LIST_REFS:
627 ae7c1b78 2023-01-10 stsp err = start_client_authentication(client, &imsg);
630 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
631 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
635 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
639 b5225f29 2023-01-22 op disconnect_on_error(client, err);
641 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
645 13b2bc37 2022-10-23 stsp static void
646 ae7c1b78 2023-01-10 stsp gotd_auth_timeout(int fd, short events, void *arg)
648 13b2bc37 2022-10-23 stsp struct gotd_client *client = arg;
650 ae7c1b78 2023-01-10 stsp log_debug("disconnecting uid %d due to authentication timeout",
651 ae7c1b78 2023-01-10 stsp client->euid);
652 13b2bc37 2022-10-23 stsp disconnect(client);
655 d93ecf7d 2022-12-14 stsp static const struct got_error *
656 d93ecf7d 2022-12-14 stsp recv_connect(uint32_t *client_id, struct imsg *imsg)
658 d93ecf7d 2022-12-14 stsp const struct got_error *err = NULL;
659 d93ecf7d 2022-12-14 stsp struct gotd_imsg_connect iconnect;
660 d93ecf7d 2022-12-14 stsp size_t datalen;
661 13b2bc37 2022-10-23 stsp int s = -1;
662 13b2bc37 2022-10-23 stsp struct gotd_client *client = NULL;
664 d93ecf7d 2022-12-14 stsp *client_id = 0;
666 d93ecf7d 2022-12-14 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
667 d93ecf7d 2022-12-14 stsp if (datalen != sizeof(iconnect))
668 d93ecf7d 2022-12-14 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
669 d93ecf7d 2022-12-14 stsp memcpy(&iconnect, imsg->data, sizeof(iconnect));
671 2c52c623 2024-01-30 op s = imsg_get_fd(imsg);
672 13b2bc37 2022-10-23 stsp if (s == -1) {
673 d93ecf7d 2022-12-14 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
677 d93ecf7d 2022-12-14 stsp if (find_client(iconnect.client_id)) {
678 d93ecf7d 2022-12-14 stsp err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
682 13b2bc37 2022-10-23 stsp client = calloc(1, sizeof(*client));
683 13b2bc37 2022-10-23 stsp if (client == NULL) {
684 d93ecf7d 2022-12-14 stsp err = got_error_from_errno("calloc");
688 d93ecf7d 2022-12-14 stsp *client_id = iconnect.client_id;
690 eac23c30 2023-01-10 stsp client->state = GOTD_CLIENT_STATE_NEW;
691 d93ecf7d 2022-12-14 stsp client->id = iconnect.client_id;
692 13b2bc37 2022-10-23 stsp client->fd = s;
694 365cf0f3 2022-12-29 stsp /* The auth process will verify UID/GID for us. */
695 365cf0f3 2022-12-29 stsp client->euid = iconnect.euid;
696 365cf0f3 2022-12-29 stsp client->egid = iconnect.egid;
698 13b2bc37 2022-10-23 stsp imsg_init(&client->iev.ibuf, client->fd);
699 13b2bc37 2022-10-23 stsp client->iev.handler = gotd_request;
700 13b2bc37 2022-10-23 stsp client->iev.events = EV_READ;
701 13b2bc37 2022-10-23 stsp client->iev.handler_arg = client;
703 13b2bc37 2022-10-23 stsp event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
704 13b2bc37 2022-10-23 stsp &client->iev);
705 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
707 ae7c1b78 2023-01-10 stsp evtimer_set(&client->tmo, gotd_auth_timeout, client);
709 13b2bc37 2022-10-23 stsp add_client(client);
710 13b2bc37 2022-10-23 stsp log_debug("%s: new client uid %d connected on fd %d", __func__,
711 13b2bc37 2022-10-23 stsp client->euid, client->fd);
714 c929736a 2023-06-22 op struct gotd_child_proc *listen_proc = gotd.listen_proc;
715 d93ecf7d 2022-12-14 stsp struct gotd_imsg_disconnect idisconnect;
717 d93ecf7d 2022-12-14 stsp idisconnect.client_id = client->id;
718 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
719 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
720 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
721 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
723 d93ecf7d 2022-12-14 stsp if (s != -1)
727 d93ecf7d 2022-12-14 stsp return err;
730 13b2bc37 2022-10-23 stsp static const char *gotd_proc_names[PROC_MAX] = {
734 ce986f22 2023-06-19 stsp "session_read",
735 ce986f22 2023-06-19 stsp "session_write",
736 13b2bc37 2022-10-23 stsp "repo_read",
737 4b3827cd 2023-07-08 stsp "repo_write",
738 4b3827cd 2023-07-08 stsp "gitwrapper"
741 13b2bc37 2022-10-23 stsp static void
742 13b2bc37 2022-10-23 stsp kill_proc(struct gotd_child_proc *proc, int fatal)
744 839338f6 2023-06-22 op struct timeval tv = { 5, 0 };
746 839338f6 2023-06-22 op log_debug("kill -%d %d", fatal ? SIGKILL : SIGTERM, proc->pid);
748 839338f6 2023-06-22 op if (proc->iev.ibuf.fd != -1) {
749 839338f6 2023-06-22 op event_del(&proc->iev.ev);
750 839338f6 2023-06-22 op msgbuf_clear(&proc->iev.ibuf.w);
751 839338f6 2023-06-22 op close(proc->iev.ibuf.fd);
752 839338f6 2023-06-22 op proc->iev.ibuf.fd = -1;
755 839338f6 2023-06-22 op if (!evtimer_pending(&proc->tmo, NULL) && !fatal)
756 839338f6 2023-06-22 op evtimer_add(&proc->tmo, &tv);
758 13b2bc37 2022-10-23 stsp if (fatal) {
759 13b2bc37 2022-10-23 stsp log_warnx("sending SIGKILL to PID %d", proc->pid);
760 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGKILL);
762 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGTERM);
765 13b2bc37 2022-10-23 stsp static void
766 839338f6 2023-06-22 op kill_proc_timeout(int fd, short ev, void *d)
768 839338f6 2023-06-22 op struct gotd_child_proc *proc = d;
770 839338f6 2023-06-22 op log_warnx("timeout waiting for PID %d to terminate;"
771 839338f6 2023-06-22 op " retrying with force", proc->pid);
772 839338f6 2023-06-22 op kill_proc(proc, 1);
776 13b2bc37 2022-10-23 stsp gotd_shutdown(void)
778 b50a2b46 2022-12-29 stsp uint64_t slot;
780 ae7c1b78 2023-01-10 stsp log_debug("shutting down");
781 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
782 b50a2b46 2022-12-29 stsp struct gotd_client *c, *tmp;
784 b50a2b46 2022-12-29 stsp STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
785 b50a2b46 2022-12-29 stsp disconnect(c);
788 839338f6 2023-06-22 op kill_proc(gotd.listen_proc, 0);
790 13b2bc37 2022-10-23 stsp log_info("terminating");
794 839338f6 2023-06-22 op static struct gotd_child_proc *
795 839338f6 2023-06-22 op find_proc_by_pid(pid_t pid)
797 839338f6 2023-06-22 op struct gotd_child_proc *proc = NULL;
799 839338f6 2023-06-22 op TAILQ_FOREACH(proc, &procs, entry)
800 839338f6 2023-06-22 op if (proc->pid == pid)
807 13b2bc37 2022-10-23 stsp gotd_sighdlr(int sig, short event, void *arg)
809 839338f6 2023-06-22 op struct gotd_child_proc *proc;
814 13b2bc37 2022-10-23 stsp * Normal signal handler rules don't apply because libevent
815 13b2bc37 2022-10-23 stsp * decouples for us.
818 13b2bc37 2022-10-23 stsp switch (sig) {
819 13b2bc37 2022-10-23 stsp case SIGHUP:
820 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGHUP", __func__);
822 13b2bc37 2022-10-23 stsp case SIGUSR1:
823 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGUSR1", __func__);
825 13b2bc37 2022-10-23 stsp case SIGTERM:
826 13b2bc37 2022-10-23 stsp case SIGINT:
827 13b2bc37 2022-10-23 stsp gotd_shutdown();
829 839338f6 2023-06-22 op case SIGCHLD:
831 839338f6 2023-06-22 op pid = waitpid(WAIT_ANY, &status, WNOHANG);
832 839338f6 2023-06-22 op if (pid == -1) {
833 839338f6 2023-06-22 op if (errno == EINTR)
835 839338f6 2023-06-22 op if (errno == ECHILD)
837 839338f6 2023-06-22 op fatal("waitpid");
839 839338f6 2023-06-22 op if (pid == 0)
842 839338f6 2023-06-22 op log_debug("reaped pid %d", pid);
843 839338f6 2023-06-22 op proc = find_proc_by_pid(pid);
844 839338f6 2023-06-22 op if (proc == NULL) {
845 839338f6 2023-06-22 op log_info("caught exit of unknown child %d",
850 839338f6 2023-06-22 op if (WIFSIGNALED(status)) {
851 839338f6 2023-06-22 op log_warnx("child PID %d terminated with"
852 839338f6 2023-06-22 op " signal %d", pid, WTERMSIG(status));
855 839338f6 2023-06-22 op proc_done(proc);
859 13b2bc37 2022-10-23 stsp fatalx("unexpected signal");
863 13b2bc37 2022-10-23 stsp static const struct got_error *
864 13b2bc37 2022-10-23 stsp ensure_proc_is_reading(struct gotd_client *client,
865 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
867 13b2bc37 2022-10-23 stsp if (!client_is_reading(client)) {
868 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
869 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
870 13b2bc37 2022-10-23 stsp "PID %d handled a read-request for uid %d but this "
871 13b2bc37 2022-10-23 stsp "user is not reading from a repository", proc->pid,
872 13b2bc37 2022-10-23 stsp client->euid);
875 13b2bc37 2022-10-23 stsp return NULL;
878 13b2bc37 2022-10-23 stsp static const struct got_error *
879 13b2bc37 2022-10-23 stsp ensure_proc_is_writing(struct gotd_client *client,
880 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
882 13b2bc37 2022-10-23 stsp if (!client_is_writing(client)) {
883 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
884 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
885 13b2bc37 2022-10-23 stsp "PID %d handled a write-request for uid %d but this "
886 13b2bc37 2022-10-23 stsp "user is not writing to a repository", proc->pid,
887 13b2bc37 2022-10-23 stsp client->euid);
890 13b2bc37 2022-10-23 stsp return NULL;
894 13b2bc37 2022-10-23 stsp verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
895 13b2bc37 2022-10-23 stsp struct imsg *imsg)
897 13b2bc37 2022-10-23 stsp const struct got_error *err;
898 13b2bc37 2022-10-23 stsp int ret = 0;
900 d93ecf7d 2022-12-14 stsp if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
901 f7a854cf 2023-01-10 stsp if (client->repo == NULL)
902 d93ecf7d 2022-12-14 stsp fatalx("no process found for uid %d", client->euid);
903 f7a854cf 2023-01-10 stsp if (proc->pid != client->repo->pid) {
904 d93ecf7d 2022-12-14 stsp kill_proc(proc, 1);
905 d93ecf7d 2022-12-14 stsp log_warnx("received message from PID %d for uid %d, "
906 d93ecf7d 2022-12-14 stsp "while PID %d is the process serving this user",
907 f7a854cf 2023-01-10 stsp proc->pid, client->euid, client->repo->pid);
911 b0614828 2023-06-19 stsp if (proc->type == PROC_SESSION_READ ||
912 b0614828 2023-06-19 stsp proc->type == PROC_SESSION_WRITE) {
913 ae7c1b78 2023-01-10 stsp if (client->session == NULL) {
914 ae7c1b78 2023-01-10 stsp log_warnx("no session found for uid %d", client->euid);
917 ae7c1b78 2023-01-10 stsp if (proc->pid != client->session->pid) {
918 ae7c1b78 2023-01-10 stsp kill_proc(proc, 1);
919 ae7c1b78 2023-01-10 stsp log_warnx("received message from PID %d for uid %d, "
920 ae7c1b78 2023-01-10 stsp "while PID %d is the process serving this user",
921 ae7c1b78 2023-01-10 stsp proc->pid, client->euid, client->session->pid);
926 13b2bc37 2022-10-23 stsp switch (imsg->hdr.type) {
927 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
930 d93ecf7d 2022-12-14 stsp case GOTD_IMSG_CONNECT:
931 d93ecf7d 2022-12-14 stsp if (proc->type != PROC_LISTEN) {
932 d93ecf7d 2022-12-14 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
933 d93ecf7d 2022-12-14 stsp "new connection for uid %d from PID %d "
934 d93ecf7d 2022-12-14 stsp "which is not the listen process",
935 76a9a38e 2023-12-27 stsp client->euid, proc->pid);
939 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
940 5e25db14 2022-12-29 stsp if (proc->type != PROC_AUTH) {
941 5e25db14 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
942 5e25db14 2022-12-29 stsp "authentication of uid %d from PID %d "
943 5e25db14 2022-12-29 stsp "which is not the auth process",
944 76a9a38e 2023-12-27 stsp client->euid, proc->pid);
948 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CLIENT_SESSION_READY:
949 b0614828 2023-06-19 stsp if (proc->type != PROC_SESSION_READ &&
950 b0614828 2023-06-19 stsp proc->type != PROC_SESSION_WRITE) {
951 ae7c1b78 2023-01-10 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
952 ae7c1b78 2023-01-10 stsp "unexpected \"ready\" signal from PID %d",
953 ae7c1b78 2023-01-10 stsp proc->pid);
957 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
958 b50a2b46 2022-12-29 stsp if (proc->type != PROC_REPO_READ &&
959 b50a2b46 2022-12-29 stsp proc->type != PROC_REPO_WRITE) {
960 b50a2b46 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
961 b50a2b46 2022-12-29 stsp "unexpected \"ready\" signal from PID %d",
962 b50a2b46 2022-12-29 stsp proc->pid);
966 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_DONE:
967 13b2bc37 2022-10-23 stsp err = ensure_proc_is_reading(client, proc);
969 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
973 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_INSTALL:
974 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATES_START:
975 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE:
976 13b2bc37 2022-10-23 stsp err = ensure_proc_is_writing(client, proc);
978 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
983 13b2bc37 2022-10-23 stsp log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
987 13b2bc37 2022-10-23 stsp return ret;
990 13b2bc37 2022-10-23 stsp static const struct got_error *
991 ae7c1b78 2023-01-10 stsp connect_repo_child(struct gotd_client *client,
992 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *repo_proc)
994 b50a2b46 2022-12-29 stsp static const struct got_error *err;
995 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *session_iev = &client->session->iev;
996 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect_repo_child ireq;
997 ae7c1b78 2023-01-10 stsp int pipe[2];
999 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_ACCESS_GRANTED)
1000 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
1001 ae7c1b78 2023-01-10 stsp "unexpected repo child ready signal received");
1003 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1004 ae7c1b78 2023-01-10 stsp PF_UNSPEC, pipe) == -1)
1005 ae7c1b78 2023-01-10 stsp fatal("socketpair");
1007 ae7c1b78 2023-01-10 stsp memset(&ireq, 0, sizeof(ireq));
1008 ae7c1b78 2023-01-10 stsp ireq.client_id = client->id;
1009 ae7c1b78 2023-01-10 stsp ireq.proc_id = repo_proc->type;
1011 ae7c1b78 2023-01-10 stsp /* Pass repo child pipe to session child process. */
1012 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(session_iev, GOTD_IMSG_CONNECT_REPO_CHILD,
1013 ae7c1b78 2023-01-10 stsp PROC_GOTD, pipe[0], &ireq, sizeof(ireq)) == -1) {
1014 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT_REPO_CHILD");
1015 ae7c1b78 2023-01-10 stsp close(pipe[0]);
1016 ae7c1b78 2023-01-10 stsp close(pipe[1]);
1017 ae7c1b78 2023-01-10 stsp return err;
1020 ae7c1b78 2023-01-10 stsp /* Pass session child pipe to repo child process. */
1021 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&repo_proc->iev,
1022 ae7c1b78 2023-01-10 stsp GOTD_IMSG_CONNECT_REPO_CHILD, PROC_GOTD, pipe[1], NULL, 0) == -1) {
1023 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT_REPO_CHILD");
1024 ae7c1b78 2023-01-10 stsp close(pipe[1]);
1025 ae7c1b78 2023-01-10 stsp return err;
1028 13b2bc37 2022-10-23 stsp return NULL;
1031 13b2bc37 2022-10-23 stsp static void
1032 b50a2b46 2022-12-29 stsp gotd_dispatch_listener(int fd, short event, void *arg)
1034 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
1035 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
1036 c929736a 2023-06-22 op struct gotd_child_proc *proc = gotd.listen_proc;
1037 b50a2b46 2022-12-29 stsp ssize_t n;
1038 b50a2b46 2022-12-29 stsp int shut = 0;
1039 b50a2b46 2022-12-29 stsp struct imsg imsg;
1041 b50a2b46 2022-12-29 stsp if (proc->iev.ibuf.fd != fd)
1042 b50a2b46 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
1044 b50a2b46 2022-12-29 stsp if (event & EV_READ) {
1045 b50a2b46 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1046 b50a2b46 2022-12-29 stsp fatal("imsg_read error");
1047 b50a2b46 2022-12-29 stsp if (n == 0) {
1048 b50a2b46 2022-12-29 stsp /* Connection closed. */
1050 b50a2b46 2022-12-29 stsp goto done;
1054 b50a2b46 2022-12-29 stsp if (event & EV_WRITE) {
1055 b50a2b46 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1056 b50a2b46 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1057 b50a2b46 2022-12-29 stsp fatal("msgbuf_write");
1058 b50a2b46 2022-12-29 stsp if (n == 0) {
1059 b50a2b46 2022-12-29 stsp /* Connection closed. */
1061 b50a2b46 2022-12-29 stsp goto done;
1065 b50a2b46 2022-12-29 stsp for (;;) {
1066 b50a2b46 2022-12-29 stsp const struct got_error *err = NULL;
1067 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
1068 b50a2b46 2022-12-29 stsp uint32_t client_id = 0;
1069 b50a2b46 2022-12-29 stsp int do_disconnect = 0;
1071 b50a2b46 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1072 b50a2b46 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1073 b50a2b46 2022-12-29 stsp if (n == 0) /* No more messages. */
1076 b50a2b46 2022-12-29 stsp switch (imsg.hdr.type) {
1077 b50a2b46 2022-12-29 stsp case GOTD_IMSG_ERROR:
1078 b50a2b46 2022-12-29 stsp do_disconnect = 1;
1079 b50a2b46 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1081 b50a2b46 2022-12-29 stsp case GOTD_IMSG_CONNECT:
1082 b50a2b46 2022-12-29 stsp err = recv_connect(&client_id, &imsg);
1085 b50a2b46 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1089 b50a2b46 2022-12-29 stsp client = find_client(client_id);
1090 b50a2b46 2022-12-29 stsp if (client == NULL) {
1091 b50a2b46 2022-12-29 stsp log_warnx("%s: client not found", __func__);
1092 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1097 b50a2b46 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1099 b50a2b46 2022-12-29 stsp if (do_disconnect) {
1101 b50a2b46 2022-12-29 stsp disconnect_on_error(client, err);
1103 b50a2b46 2022-12-29 stsp disconnect(client);
1106 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1109 b50a2b46 2022-12-29 stsp if (!shut) {
1110 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(iev);
1112 b50a2b46 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
1113 b50a2b46 2022-12-29 stsp event_del(&iev->ev);
1114 b50a2b46 2022-12-29 stsp event_loopexit(NULL);
1118 b50a2b46 2022-12-29 stsp static void
1119 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child(int fd, short event, void *arg)
1121 5e25db14 2022-12-29 stsp const struct got_error *err = NULL;
1122 5e25db14 2022-12-29 stsp struct gotd_imsgev *iev = arg;
1123 5e25db14 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
1124 5e25db14 2022-12-29 stsp struct gotd_client *client;
1125 5e25db14 2022-12-29 stsp struct gotd_repo *repo = NULL;
1126 5e25db14 2022-12-29 stsp ssize_t n;
1127 5e25db14 2022-12-29 stsp int shut = 0;
1128 5e25db14 2022-12-29 stsp struct imsg imsg;
1129 5e25db14 2022-12-29 stsp uint32_t client_id = 0;
1130 5e25db14 2022-12-29 stsp int do_disconnect = 0;
1131 56624d2b 2023-12-27 stsp size_t datalen;
1133 5e25db14 2022-12-29 stsp client = find_client_by_proc_fd(fd);
1134 ae0cca99 2023-02-09 stsp if (client == NULL) {
1135 ae0cca99 2023-02-09 stsp /* Can happen during process teardown. */
1136 ae0cca99 2023-02-09 stsp warnx("cannot find client for fd %d", fd);
1138 ae0cca99 2023-02-09 stsp goto done;
1141 5e25db14 2022-12-29 stsp if (client->auth == NULL)
1142 5e25db14 2022-12-29 stsp fatalx("cannot find auth child process for fd %d", fd);
1144 5e25db14 2022-12-29 stsp if (event & EV_READ) {
1145 5e25db14 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1146 5e25db14 2022-12-29 stsp fatal("imsg_read error");
1147 5e25db14 2022-12-29 stsp if (n == 0) {
1148 5e25db14 2022-12-29 stsp /* Connection closed. */
1150 5e25db14 2022-12-29 stsp goto done;
1154 5e25db14 2022-12-29 stsp if (event & EV_WRITE) {
1155 5e25db14 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1156 5e25db14 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1157 5e25db14 2022-12-29 stsp fatal("msgbuf_write");
1158 5e25db14 2022-12-29 stsp if (n == 0) {
1159 5e25db14 2022-12-29 stsp /* Connection closed. */
1162 5e25db14 2022-12-29 stsp goto done;
1165 5e25db14 2022-12-29 stsp if (client->auth->iev.ibuf.fd != fd)
1166 5e25db14 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
1168 5e25db14 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1169 5e25db14 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1170 5e25db14 2022-12-29 stsp if (n == 0) /* No more messages. */
1173 5e25db14 2022-12-29 stsp evtimer_del(&client->tmo);
1175 56624d2b 2023-12-27 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1177 5e25db14 2022-12-29 stsp switch (imsg.hdr.type) {
1178 5e25db14 2022-12-29 stsp case GOTD_IMSG_ERROR:
1179 5e25db14 2022-12-29 stsp do_disconnect = 1;
1180 5e25db14 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1182 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
1183 56624d2b 2023-12-27 stsp if (client->state != GOTD_CLIENT_STATE_NEW) {
1184 56624d2b 2023-12-27 stsp do_disconnect = 1;
1185 56624d2b 2023-12-27 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1189 5e25db14 2022-12-29 stsp do_disconnect = 1;
1190 5e25db14 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1194 5e25db14 2022-12-29 stsp if (!verify_imsg_src(client, client->auth, &imsg)) {
1195 5e25db14 2022-12-29 stsp do_disconnect = 1;
1196 5e25db14 2022-12-29 stsp log_debug("dropping imsg type %d from PID %d",
1197 5e25db14 2022-12-29 stsp imsg.hdr.type, client->auth->pid);
1200 5e25db14 2022-12-29 stsp if (do_disconnect) {
1202 5e25db14 2022-12-29 stsp disconnect_on_error(client, err);
1204 5e25db14 2022-12-29 stsp disconnect(client);
1205 56624d2b 2023-12-27 stsp imsg_free(&imsg);
1209 56624d2b 2023-12-27 stsp client->state = GOTD_CLIENT_STATE_ACCESS_GRANTED;
1210 56624d2b 2023-12-27 stsp if (datalen > 0)
1211 56624d2b 2023-12-27 stsp client->username = strndup(imsg.data, datalen);
1212 56624d2b 2023-12-27 stsp imsg_free(&imsg);
1213 56624d2b 2023-12-27 stsp if (client->username == NULL &&
1214 56624d2b 2023-12-27 stsp asprintf(&client->username, "uid %d", client->euid) == -1) {
1215 56624d2b 2023-12-27 stsp err = got_error_from_errno("asprintf");
1216 56624d2b 2023-12-27 stsp goto done;
1219 b09c1279 2023-03-28 stsp repo = gotd_find_repo_by_name(client->auth->repo_name, &gotd);
1220 5e25db14 2022-12-29 stsp if (repo == NULL) {
1221 5e25db14 2022-12-29 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
1222 5e25db14 2022-12-29 stsp goto done;
1224 5e25db14 2022-12-29 stsp kill_auth_proc(client);
1226 56624d2b 2023-12-27 stsp log_info("authenticated %s for repository %s",
1227 56624d2b 2023-12-27 stsp client->username, repo->name);
1229 ae7c1b78 2023-01-10 stsp err = start_session_child(client, repo, gotd.argv0,
1230 7fdc3e58 2022-12-30 mark gotd.confpath, gotd.daemonize, gotd.verbosity);
1232 ae7c1b78 2023-01-10 stsp goto done;
1235 5e25db14 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1237 5e25db14 2022-12-29 stsp /* We might have killed the auth process by now. */
1238 5e25db14 2022-12-29 stsp if (client->auth != NULL) {
1239 5e25db14 2022-12-29 stsp if (!shut) {
1240 5e25db14 2022-12-29 stsp gotd_imsg_event_add(iev);
1242 5e25db14 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
1243 5e25db14 2022-12-29 stsp event_del(&iev->ev);
1248 ae7c1b78 2023-01-10 stsp static const struct got_error *
1249 ae7c1b78 2023-01-10 stsp connect_session(struct gotd_client *client)
1251 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1252 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect iconnect;
1255 ae7c1b78 2023-01-10 stsp memset(&iconnect, 0, sizeof(iconnect));
1257 ae7c1b78 2023-01-10 stsp s = dup(client->fd);
1258 ae7c1b78 2023-01-10 stsp if (s == -1)
1259 ae7c1b78 2023-01-10 stsp return got_error_from_errno("dup");
1261 ae7c1b78 2023-01-10 stsp iconnect.client_id = client->id;
1262 ae7c1b78 2023-01-10 stsp iconnect.euid = client->euid;
1263 ae7c1b78 2023-01-10 stsp iconnect.egid = client->egid;
1265 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->session->iev, GOTD_IMSG_CONNECT,
1266 ae7c1b78 2023-01-10 stsp PROC_GOTD, s, &iconnect, sizeof(iconnect)) == -1) {
1267 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT");
1269 ae7c1b78 2023-01-10 stsp return err;
1273 ae7c1b78 2023-01-10 stsp * We are no longer interested in messages from this client.
1274 ae7c1b78 2023-01-10 stsp * Further client requests will be handled by the session process.
1276 ae7c1b78 2023-01-10 stsp msgbuf_clear(&client->iev.ibuf.w);
1277 ae7c1b78 2023-01-10 stsp imsg_clear(&client->iev.ibuf);
1278 ae7c1b78 2023-01-10 stsp event_del(&client->iev.ev);
1279 ae7c1b78 2023-01-10 stsp client->fd = -1; /* will be closed via copy in client->iev.ibuf.fd */
1281 ae7c1b78 2023-01-10 stsp return NULL;
1284 5e25db14 2022-12-29 stsp static void
1285 ae7c1b78 2023-01-10 stsp gotd_dispatch_client_session(int fd, short event, void *arg)
1287 b50a2b46 2022-12-29 stsp struct gotd_imsgev *iev = arg;
1288 b50a2b46 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
1289 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc = NULL;
1290 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
1291 13b2bc37 2022-10-23 stsp ssize_t n;
1292 13b2bc37 2022-10-23 stsp int shut = 0;
1293 13b2bc37 2022-10-23 stsp struct imsg imsg;
1295 ae7c1b78 2023-01-10 stsp client = find_client_by_proc_fd(fd);
1296 ae0cca99 2023-02-09 stsp if (client == NULL) {
1297 ae0cca99 2023-02-09 stsp /* Can happen during process teardown. */
1298 ae0cca99 2023-02-09 stsp warnx("cannot find client for fd %d", fd);
1300 ae0cca99 2023-02-09 stsp goto done;
1303 13b2bc37 2022-10-23 stsp if (event & EV_READ) {
1304 13b2bc37 2022-10-23 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1305 13b2bc37 2022-10-23 stsp fatal("imsg_read error");
1306 13b2bc37 2022-10-23 stsp if (n == 0) {
1307 13b2bc37 2022-10-23 stsp /* Connection closed. */
1309 13b2bc37 2022-10-23 stsp goto done;
1313 13b2bc37 2022-10-23 stsp if (event & EV_WRITE) {
1314 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
1315 13b2bc37 2022-10-23 stsp if (n == -1 && errno != EAGAIN)
1316 13b2bc37 2022-10-23 stsp fatal("msgbuf_write");
1317 13b2bc37 2022-10-23 stsp if (n == 0) {
1318 13b2bc37 2022-10-23 stsp /* Connection closed. */
1320 13b2bc37 2022-10-23 stsp goto done;
1324 ae7c1b78 2023-01-10 stsp proc = client->session;
1325 ae7c1b78 2023-01-10 stsp if (proc == NULL)
1326 ae7c1b78 2023-01-10 stsp fatalx("cannot find session child process for fd %d", fd);
1328 ae7c1b78 2023-01-10 stsp for (;;) {
1329 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1330 ae7c1b78 2023-01-10 stsp uint32_t client_id = 0;
1331 ae7c1b78 2023-01-10 stsp int do_disconnect = 0, do_start_repo_child = 0;
1333 ae7c1b78 2023-01-10 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1334 ae7c1b78 2023-01-10 stsp fatal("%s: imsg_get error", __func__);
1335 ae7c1b78 2023-01-10 stsp if (n == 0) /* No more messages. */
1338 ae7c1b78 2023-01-10 stsp switch (imsg.hdr.type) {
1339 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_ERROR:
1340 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1341 ae7c1b78 2023-01-10 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1343 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CLIENT_SESSION_READY:
1344 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_ACCESS_GRANTED) {
1345 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1348 ae7c1b78 2023-01-10 stsp do_start_repo_child = 1;
1350 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_DISCONNECT:
1351 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1354 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1358 ae7c1b78 2023-01-10 stsp if (!verify_imsg_src(client, proc, &imsg)) {
1359 ae7c1b78 2023-01-10 stsp log_debug("dropping imsg type %d from PID %d",
1360 ae7c1b78 2023-01-10 stsp imsg.hdr.type, proc->pid);
1361 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1365 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1367 ae7c1b78 2023-01-10 stsp if (do_start_repo_child) {
1368 ae7c1b78 2023-01-10 stsp struct gotd_repo *repo;
1369 b09c1279 2023-03-28 stsp const char *name = client->session->repo_name;
1371 b09c1279 2023-03-28 stsp repo = gotd_find_repo_by_name(name, &gotd);
1372 ae7c1b78 2023-01-10 stsp if (repo != NULL) {
1373 ae7c1b78 2023-01-10 stsp enum gotd_procid proc_type;
1375 ae7c1b78 2023-01-10 stsp if (client->required_auth & GOTD_AUTH_WRITE)
1376 ae7c1b78 2023-01-10 stsp proc_type = PROC_REPO_WRITE;
1378 ae7c1b78 2023-01-10 stsp proc_type = PROC_REPO_READ;
1380 ae7c1b78 2023-01-10 stsp err = start_repo_child(client, proc_type, repo,
1381 ae7c1b78 2023-01-10 stsp gotd.argv0, gotd.confpath, gotd.daemonize,
1382 ae7c1b78 2023-01-10 stsp gotd.verbosity);
1384 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
1386 ae7c1b78 2023-01-10 stsp if (err) {
1387 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1388 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1392 ae7c1b78 2023-01-10 stsp if (do_disconnect) {
1394 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1396 ae7c1b78 2023-01-10 stsp disconnect(client);
1399 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1402 ae7c1b78 2023-01-10 stsp if (!shut) {
1403 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
1405 ae7c1b78 2023-01-10 stsp /* This pipe is dead. Remove its event handler */
1406 ae7c1b78 2023-01-10 stsp event_del(&iev->ev);
1407 ae7c1b78 2023-01-10 stsp disconnect(client);
1411 ae7c1b78 2023-01-10 stsp static void
1412 ae7c1b78 2023-01-10 stsp gotd_dispatch_repo_child(int fd, short event, void *arg)
1414 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = arg;
1415 ae7c1b78 2023-01-10 stsp struct imsgbuf *ibuf = &iev->ibuf;
1416 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *proc = NULL;
1417 ae7c1b78 2023-01-10 stsp struct gotd_client *client;
1418 ae7c1b78 2023-01-10 stsp ssize_t n;
1419 ae7c1b78 2023-01-10 stsp int shut = 0;
1420 ae7c1b78 2023-01-10 stsp struct imsg imsg;
1422 b50a2b46 2022-12-29 stsp client = find_client_by_proc_fd(fd);
1423 ae0cca99 2023-02-09 stsp if (client == NULL) {
1424 ae0cca99 2023-02-09 stsp /* Can happen during process teardown. */
1425 ae0cca99 2023-02-09 stsp warnx("cannot find client for fd %d", fd);
1427 ae0cca99 2023-02-09 stsp goto done;
1430 ae7c1b78 2023-01-10 stsp if (event & EV_READ) {
1431 ae7c1b78 2023-01-10 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1432 ae7c1b78 2023-01-10 stsp fatal("imsg_read error");
1433 ae7c1b78 2023-01-10 stsp if (n == 0) {
1434 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1436 ae7c1b78 2023-01-10 stsp goto done;
1440 ae7c1b78 2023-01-10 stsp if (event & EV_WRITE) {
1441 ae7c1b78 2023-01-10 stsp n = msgbuf_write(&ibuf->w);
1442 ae7c1b78 2023-01-10 stsp if (n == -1 && errno != EAGAIN)
1443 ae7c1b78 2023-01-10 stsp fatal("msgbuf_write");
1444 ae7c1b78 2023-01-10 stsp if (n == 0) {
1445 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1447 ae7c1b78 2023-01-10 stsp goto done;
1451 f7a854cf 2023-01-10 stsp proc = client->repo;
1452 13b2bc37 2022-10-23 stsp if (proc == NULL)
1453 13b2bc37 2022-10-23 stsp fatalx("cannot find child process for fd %d", fd);
1455 13b2bc37 2022-10-23 stsp for (;;) {
1456 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1457 13b2bc37 2022-10-23 stsp uint32_t client_id = 0;
1458 13b2bc37 2022-10-23 stsp int do_disconnect = 0;
1460 13b2bc37 2022-10-23 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1461 13b2bc37 2022-10-23 stsp fatal("%s: imsg_get error", __func__);
1462 13b2bc37 2022-10-23 stsp if (n == 0) /* No more messages. */
1465 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1466 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1467 13b2bc37 2022-10-23 stsp do_disconnect = 1;
1468 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1470 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
1471 ae7c1b78 2023-01-10 stsp err = connect_session(client);
1474 ae7c1b78 2023-01-10 stsp err = connect_repo_child(client, proc);
1477 13b2bc37 2022-10-23 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1481 13b2bc37 2022-10-23 stsp if (!verify_imsg_src(client, proc, &imsg)) {
1482 13b2bc37 2022-10-23 stsp log_debug("dropping imsg type %d from PID %d",
1483 13b2bc37 2022-10-23 stsp imsg.hdr.type, proc->pid);
1484 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1488 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1490 13b2bc37 2022-10-23 stsp if (do_disconnect) {
1492 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
1494 13b2bc37 2022-10-23 stsp disconnect(client);
1497 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1500 13b2bc37 2022-10-23 stsp if (!shut) {
1501 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(iev);
1503 13b2bc37 2022-10-23 stsp /* This pipe is dead. Remove its event handler */
1504 13b2bc37 2022-10-23 stsp event_del(&iev->ev);
1505 ae7c1b78 2023-01-10 stsp disconnect(client);
1509 13b2bc37 2022-10-23 stsp static pid_t
1510 eec68231 2022-12-14 stsp start_child(enum gotd_procid proc_id, const char *repo_path,
1511 585362fd 2022-10-31 op char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
1513 585362fd 2022-10-31 op char *argv[11];
1514 13b2bc37 2022-10-23 stsp int argc = 0;
1515 13b2bc37 2022-10-23 stsp pid_t pid;
1517 13b2bc37 2022-10-23 stsp switch (pid = fork()) {
1519 13b2bc37 2022-10-23 stsp fatal("cannot fork");
1523 13b2bc37 2022-10-23 stsp close(fd);
1524 13b2bc37 2022-10-23 stsp return pid;
1527 8c6fc146 2022-11-17 stsp if (fd != GOTD_FILENO_MSG_PIPE) {
1528 8c6fc146 2022-11-17 stsp if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
1529 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
1530 13b2bc37 2022-10-23 stsp } else if (fcntl(fd, F_SETFD, 0) == -1)
1531 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
1533 13b2bc37 2022-10-23 stsp argv[argc++] = argv0;
1534 13b2bc37 2022-10-23 stsp switch (proc_id) {
1535 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
1536 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-L";
1538 5e25db14 2022-12-29 stsp case PROC_AUTH:
1539 5e25db14 2022-12-29 stsp argv[argc++] = (char *)"-A";
1541 b0614828 2023-06-19 stsp case PROC_SESSION_READ:
1542 b0614828 2023-06-19 stsp argv[argc++] = (char *)"-s";
1544 b0614828 2023-06-19 stsp case PROC_SESSION_WRITE:
1545 ae7c1b78 2023-01-10 stsp argv[argc++] = (char *)"-S";
1547 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
1548 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-R";
1550 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
1551 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-W";
1554 13b2bc37 2022-10-23 stsp fatalx("invalid process id %d", proc_id);
1557 585362fd 2022-10-31 op argv[argc++] = (char *)"-f";
1558 585362fd 2022-10-31 op argv[argc++] = (char *)confpath;
1560 eec68231 2022-12-14 stsp if (repo_path) {
1561 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-P";
1562 eec68231 2022-12-14 stsp argv[argc++] = (char *)repo_path;
1565 13b2bc37 2022-10-23 stsp if (!daemonize)
1566 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-d";
1567 13b2bc37 2022-10-23 stsp if (verbosity > 0)
1568 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
1569 13b2bc37 2022-10-23 stsp if (verbosity > 1)
1570 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
1571 13b2bc37 2022-10-23 stsp argv[argc++] = NULL;
1573 13b2bc37 2022-10-23 stsp execvp(argv0, argv);
1574 13b2bc37 2022-10-23 stsp fatal("execvp");
1577 13b2bc37 2022-10-23 stsp static void
1578 d93ecf7d 2022-12-14 stsp start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
1580 c929736a 2023-06-22 op struct gotd_child_proc *proc;
1582 c929736a 2023-06-22 op proc = calloc(1, sizeof(*proc));
1583 c929736a 2023-06-22 op if (proc == NULL)
1584 c929736a 2023-06-22 op fatal("calloc");
1586 839338f6 2023-06-22 op TAILQ_INSERT_HEAD(&procs, proc, entry);
1588 839338f6 2023-06-22 op /* proc->tmo is initialized in main() after event_init() */
1590 d93ecf7d 2022-12-14 stsp proc->type = PROC_LISTEN;
1592 d93ecf7d 2022-12-14 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1593 d93ecf7d 2022-12-14 stsp PF_UNSPEC, proc->pipe) == -1)
1594 d93ecf7d 2022-12-14 stsp fatal("socketpair");
1596 d93ecf7d 2022-12-14 stsp proc->pid = start_child(proc->type, NULL, argv0, confpath,
1597 d93ecf7d 2022-12-14 stsp proc->pipe[1], daemonize, verbosity);
1598 d93ecf7d 2022-12-14 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1599 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_listener;
1600 d93ecf7d 2022-12-14 stsp proc->iev.events = EV_READ;
1601 d93ecf7d 2022-12-14 stsp proc->iev.handler_arg = NULL;
1603 c929736a 2023-06-22 op gotd.listen_proc = proc;
1606 b50a2b46 2022-12-29 stsp static const struct got_error *
1607 ae7c1b78 2023-01-10 stsp start_session_child(struct gotd_client *client, struct gotd_repo *repo,
1608 ae7c1b78 2023-01-10 stsp char *argv0, const char *confpath, int daemonize, int verbosity)
1610 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *proc;
1612 ae7c1b78 2023-01-10 stsp proc = calloc(1, sizeof(*proc));
1613 ae7c1b78 2023-01-10 stsp if (proc == NULL)
1614 ae7c1b78 2023-01-10 stsp return got_error_from_errno("calloc");
1616 839338f6 2023-06-22 op TAILQ_INSERT_HEAD(&procs, proc, entry);
1617 839338f6 2023-06-22 op evtimer_set(&proc->tmo, kill_proc_timeout, proc);
1619 b0614828 2023-06-19 stsp if (client_is_reading(client))
1620 b0614828 2023-06-19 stsp proc->type = PROC_SESSION_READ;
1622 b0614828 2023-06-19 stsp proc->type = PROC_SESSION_WRITE;
1623 ae7c1b78 2023-01-10 stsp if (strlcpy(proc->repo_name, repo->name,
1624 ae7c1b78 2023-01-10 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1625 ae7c1b78 2023-01-10 stsp fatalx("repository name too long: %s", repo->name);
1626 ae7c1b78 2023-01-10 stsp log_debug("starting client uid %d session for repository %s",
1627 ae7c1b78 2023-01-10 stsp client->euid, repo->name);
1628 ae7c1b78 2023-01-10 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1629 ae7c1b78 2023-01-10 stsp sizeof(proc->repo_path))
1630 ae7c1b78 2023-01-10 stsp fatalx("repository path too long: %s", repo->path);
1631 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1632 ae7c1b78 2023-01-10 stsp PF_UNSPEC, proc->pipe) == -1)
1633 ae7c1b78 2023-01-10 stsp fatal("socketpair");
1634 ae7c1b78 2023-01-10 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1635 ae7c1b78 2023-01-10 stsp confpath, proc->pipe[1], daemonize, verbosity);
1636 ae7c1b78 2023-01-10 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1637 ae7c1b78 2023-01-10 stsp log_debug("proc %s %s is on fd %d",
1638 ae7c1b78 2023-01-10 stsp gotd_proc_names[proc->type], proc->repo_path,
1639 ae7c1b78 2023-01-10 stsp proc->pipe[0]);
1640 ae7c1b78 2023-01-10 stsp proc->iev.handler = gotd_dispatch_client_session;
1641 ae7c1b78 2023-01-10 stsp proc->iev.events = EV_READ;
1642 ae7c1b78 2023-01-10 stsp proc->iev.handler_arg = NULL;
1643 ae7c1b78 2023-01-10 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1644 ae7c1b78 2023-01-10 stsp gotd_dispatch_client_session, &proc->iev);
1645 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(&proc->iev);
1647 ae7c1b78 2023-01-10 stsp client->session = proc;
1648 ae7c1b78 2023-01-10 stsp return NULL;
1651 ae7c1b78 2023-01-10 stsp static const struct got_error *
1652 b50a2b46 2022-12-29 stsp start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
1653 b50a2b46 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
1654 585362fd 2022-10-31 op int daemonize, int verbosity)
1656 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc;
1658 b50a2b46 2022-12-29 stsp if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
1659 b50a2b46 2022-12-29 stsp return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
1661 b50a2b46 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
1662 b50a2b46 2022-12-29 stsp if (proc == NULL)
1663 b50a2b46 2022-12-29 stsp return got_error_from_errno("calloc");
1665 839338f6 2023-06-22 op TAILQ_INSERT_HEAD(&procs, proc, entry);
1666 839338f6 2023-06-22 op evtimer_set(&proc->tmo, kill_proc_timeout, proc);
1668 b50a2b46 2022-12-29 stsp proc->type = proc_type;
1669 b50a2b46 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
1670 b50a2b46 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1671 b50a2b46 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
1672 b50a2b46 2022-12-29 stsp log_debug("starting %s for repository %s",
1673 b50a2b46 2022-12-29 stsp proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
1674 9b7f22a6 2023-01-08 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1675 9b7f22a6 2023-01-08 stsp sizeof(proc->repo_path))
1676 9b7f22a6 2023-01-08 stsp fatalx("repository path too long: %s", repo->path);
1677 b50a2b46 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1678 b50a2b46 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
1679 b50a2b46 2022-12-29 stsp fatal("socketpair");
1680 b50a2b46 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1681 b50a2b46 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
1682 b50a2b46 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1683 b50a2b46 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
1684 b50a2b46 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
1685 b50a2b46 2022-12-29 stsp proc->pipe[0]);
1686 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_repo_child;
1687 b50a2b46 2022-12-29 stsp proc->iev.events = EV_READ;
1688 b50a2b46 2022-12-29 stsp proc->iev.handler_arg = NULL;
1689 b50a2b46 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1690 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child, &proc->iev);
1691 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
1693 f7a854cf 2023-01-10 stsp client->repo = proc;
1694 5e25db14 2022-12-29 stsp return NULL;
1697 5e25db14 2022-12-29 stsp static const struct got_error *
1698 5e25db14 2022-12-29 stsp start_auth_child(struct gotd_client *client, int required_auth,
1699 5e25db14 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
1700 5e25db14 2022-12-29 stsp int daemonize, int verbosity)
1702 365cf0f3 2022-12-29 stsp const struct got_error *err = NULL;
1703 5e25db14 2022-12-29 stsp struct gotd_child_proc *proc;
1704 5e25db14 2022-12-29 stsp struct gotd_imsg_auth iauth;
1707 5e25db14 2022-12-29 stsp memset(&iauth, 0, sizeof(iauth));
1709 365cf0f3 2022-12-29 stsp fd = dup(client->fd);
1710 365cf0f3 2022-12-29 stsp if (fd == -1)
1711 365cf0f3 2022-12-29 stsp return got_error_from_errno("dup");
1713 5e25db14 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
1714 365cf0f3 2022-12-29 stsp if (proc == NULL) {
1715 365cf0f3 2022-12-29 stsp err = got_error_from_errno("calloc");
1716 365cf0f3 2022-12-29 stsp close(fd);
1717 365cf0f3 2022-12-29 stsp return err;
1720 839338f6 2023-06-22 op TAILQ_INSERT_HEAD(&procs, proc, entry);
1721 839338f6 2023-06-22 op evtimer_set(&proc->tmo, kill_proc_timeout, proc);
1723 5e25db14 2022-12-29 stsp proc->type = PROC_AUTH;
1724 5e25db14 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
1725 5e25db14 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1726 5e25db14 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
1727 5e25db14 2022-12-29 stsp log_debug("starting auth for uid %d repository %s",
1728 5e25db14 2022-12-29 stsp client->euid, repo->name);
1729 9b7f22a6 2023-01-08 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1730 9b7f22a6 2023-01-08 stsp sizeof(proc->repo_path))
1731 9b7f22a6 2023-01-08 stsp fatalx("repository path too long: %s", repo->path);
1732 5e25db14 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1733 5e25db14 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
1734 5e25db14 2022-12-29 stsp fatal("socketpair");
1735 5e25db14 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1736 5e25db14 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
1737 5e25db14 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1738 5e25db14 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
1739 5e25db14 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
1740 5e25db14 2022-12-29 stsp proc->pipe[0]);
1741 5e25db14 2022-12-29 stsp proc->iev.handler = gotd_dispatch_auth_child;
1742 5e25db14 2022-12-29 stsp proc->iev.events = EV_READ;
1743 5e25db14 2022-12-29 stsp proc->iev.handler_arg = NULL;
1744 5e25db14 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1745 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child, &proc->iev);
1746 5e25db14 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
1748 5e25db14 2022-12-29 stsp iauth.euid = client->euid;
1749 5e25db14 2022-12-29 stsp iauth.egid = client->egid;
1750 5e25db14 2022-12-29 stsp iauth.required_auth = required_auth;
1751 5e25db14 2022-12-29 stsp iauth.client_id = client->id;
1752 5e25db14 2022-12-29 stsp if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
1753 365cf0f3 2022-12-29 stsp PROC_GOTD, fd, &iauth, sizeof(iauth)) == -1) {
1754 5e25db14 2022-12-29 stsp log_warn("imsg compose AUTHENTICATE");
1755 365cf0f3 2022-12-29 stsp close(fd);
1756 365cf0f3 2022-12-29 stsp /* Let the auth_timeout handler tidy up. */
1759 5e25db14 2022-12-29 stsp client->auth = proc;
1760 5e25db14 2022-12-29 stsp client->required_auth = required_auth;
1761 b50a2b46 2022-12-29 stsp return NULL;
1764 eec68231 2022-12-14 stsp static void
1765 b0614828 2023-06-19 stsp apply_unveil_repo_readonly(const char *repo_path, int need_tmpdir)
1767 b0614828 2023-06-19 stsp if (need_tmpdir) {
1768 b0614828 2023-06-19 stsp if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
1769 b0614828 2023-06-19 stsp fatal("unveil %s", GOT_TMPDIR_STR);
1772 eec68231 2022-12-14 stsp if (unveil(repo_path, "r") == -1)
1773 eec68231 2022-12-14 stsp fatal("unveil %s", repo_path);
1775 44587340 2022-12-30 stsp if (unveil(NULL, NULL) == -1)
1776 44587340 2022-12-30 stsp fatal("unveil");
1779 44587340 2022-12-30 stsp static void
1780 ae7c1b78 2023-01-10 stsp apply_unveil_repo_readwrite(const char *repo_path)
1782 ae7c1b78 2023-01-10 stsp if (unveil(repo_path, "rwc") == -1)
1783 ae7c1b78 2023-01-10 stsp fatal("unveil %s", repo_path);
1785 ae7c1b78 2023-01-10 stsp if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
1786 ae7c1b78 2023-01-10 stsp fatal("unveil %s", GOT_TMPDIR_STR);
1788 ae7c1b78 2023-01-10 stsp if (unveil(NULL, NULL) == -1)
1789 ae7c1b78 2023-01-10 stsp fatal("unveil");
1792 ae7c1b78 2023-01-10 stsp static void
1793 44587340 2022-12-30 stsp apply_unveil_none(void)
1795 44587340 2022-12-30 stsp if (unveil("/", "") == -1)
1796 44587340 2022-12-30 stsp fatal("unveil");
1798 eec68231 2022-12-14 stsp if (unveil(NULL, NULL) == -1)
1799 eec68231 2022-12-14 stsp fatal("unveil");
1802 13b2bc37 2022-10-23 stsp static void
1803 ae7c1b78 2023-01-10 stsp apply_unveil_selfexec(void)
1805 b50a2b46 2022-12-29 stsp if (unveil(gotd.argv0, "x") == -1)
1806 b50a2b46 2022-12-29 stsp fatal("unveil %s", gotd.argv0);
1808 13b2bc37 2022-10-23 stsp if (unveil(NULL, NULL) == -1)
1809 13b2bc37 2022-10-23 stsp fatal("unveil");
1812 abe89edb 2023-11-16 stsp static void
1813 abe89edb 2023-11-16 stsp set_max_datasize(void)
1815 abe89edb 2023-11-16 stsp struct rlimit rl;
1817 abe89edb 2023-11-16 stsp if (getrlimit(RLIMIT_DATA, &rl) != 0)
1820 abe89edb 2023-11-16 stsp rl.rlim_cur = rl.rlim_max;
1821 abe89edb 2023-11-16 stsp setrlimit(RLIMIT_DATA, &rl);
1825 13b2bc37 2022-10-23 stsp main(int argc, char **argv)
1827 13b2bc37 2022-10-23 stsp const struct got_error *error = NULL;
1828 13b2bc37 2022-10-23 stsp int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
1829 13b2bc37 2022-10-23 stsp const char *confpath = GOTD_CONF_PATH;
1830 13b2bc37 2022-10-23 stsp char *argv0 = argv[0];
1831 13b2bc37 2022-10-23 stsp char title[2048];
1832 13b2bc37 2022-10-23 stsp struct passwd *pw = NULL;
1833 13b2bc37 2022-10-23 stsp char *repo_path = NULL;
1834 13b2bc37 2022-10-23 stsp enum gotd_procid proc_id = PROC_GOTD;
1835 839338f6 2023-06-22 op struct event evsigint, evsigterm, evsighup, evsigusr1, evsigchld;
1836 13b2bc37 2022-10-23 stsp int *pack_fds = NULL, *temp_fds = NULL;
1837 9afa3de2 2023-04-04 stsp struct gotd_repo *repo = NULL;
1839 839338f6 2023-06-22 op TAILQ_INIT(&procs);
1841 13b2bc37 2022-10-23 stsp log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
1843 b0614828 2023-06-19 stsp while ((ch = getopt(argc, argv, "Adf:LnP:RsSvW")) != -1) {
1844 13b2bc37 2022-10-23 stsp switch (ch) {
1846 5e25db14 2022-12-29 stsp proc_id = PROC_AUTH;
1849 13b2bc37 2022-10-23 stsp daemonize = 0;
1852 13b2bc37 2022-10-23 stsp confpath = optarg;
1855 d93ecf7d 2022-12-14 stsp proc_id = PROC_LISTEN;
1858 13b2bc37 2022-10-23 stsp noaction = 1;
1861 6f319063 2022-10-27 stsp repo_path = realpath(optarg, NULL);
1862 6f319063 2022-10-27 stsp if (repo_path == NULL)
1863 6f319063 2022-10-27 stsp fatal("realpath '%s'", optarg);
1866 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_READ;
1869 b0614828 2023-06-19 stsp proc_id = PROC_SESSION_READ;
1872 b0614828 2023-06-19 stsp proc_id = PROC_SESSION_WRITE;
1875 6f319063 2022-10-27 stsp if (verbosity < 3)
1876 6f319063 2022-10-27 stsp verbosity++;
1879 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_WRITE;
1886 13b2bc37 2022-10-23 stsp argc -= optind;
1887 13b2bc37 2022-10-23 stsp argv += optind;
1889 13b2bc37 2022-10-23 stsp if (argc != 0)
1892 b50a2b46 2022-12-29 stsp if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
1893 13b2bc37 2022-10-23 stsp fatalx("need root privileges");
1895 4b3827cd 2023-07-08 stsp if (parse_config(confpath, proc_id, &gotd) != 0)
1898 13b2bc37 2022-10-23 stsp pw = getpwnam(gotd.user_name);
1899 13b2bc37 2022-10-23 stsp if (pw == NULL)
1900 898c8f8f 2022-12-29 op fatalx("user %s not found", gotd.user_name);
1902 f4e8c21c 2023-01-17 op if (pw->pw_uid == 0)
1903 f4e8c21c 2023-01-17 op fatalx("cannot run %s as the superuser", getprogname());
1905 f4e8c21c 2023-01-17 op if (noaction) {
1906 f4e8c21c 2023-01-17 op fprintf(stderr, "configuration OK\n");
1910 f4e8c21c 2023-01-17 op gotd.argv0 = argv0;
1911 f4e8c21c 2023-01-17 op gotd.daemonize = daemonize;
1912 f4e8c21c 2023-01-17 op gotd.verbosity = verbosity;
1913 f4e8c21c 2023-01-17 op gotd.confpath = confpath;
1915 f4e8c21c 2023-01-17 op /* Require an absolute path in argv[0] for reliable re-exec. */
1916 f4e8c21c 2023-01-17 op if (!got_path_is_absolute(argv0))
1917 f4e8c21c 2023-01-17 op fatalx("bad path \"%s\": must be an absolute path", argv0);
1919 f4e8c21c 2023-01-17 op log_init(daemonize ? 0 : 1, LOG_DAEMON);
1920 f4e8c21c 2023-01-17 op log_setverbose(verbosity);
1922 b1142068 2022-12-05 stsp if (proc_id == PROC_GOTD) {
1923 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
1924 d93ecf7d 2022-12-14 stsp arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
1925 d93ecf7d 2022-12-14 stsp if (daemonize && daemon(1, 0) == -1)
1926 d93ecf7d 2022-12-14 stsp fatal("daemon");
1927 f7eb3370 2023-01-23 stsp gotd.pid = getpid();
1928 f7eb3370 2023-01-23 stsp start_listener(argv0, confpath, daemonize, verbosity);
1929 d93ecf7d 2022-12-14 stsp } else if (proc_id == PROC_LISTEN) {
1930 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
1931 b1142068 2022-12-05 stsp if (verbosity) {
1932 b1142068 2022-12-05 stsp log_info("socket: %s", gotd.unix_socket_path);
1933 b1142068 2022-12-05 stsp log_info("user: %s", pw->pw_name);
1936 13b2bc37 2022-10-23 stsp fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
1937 6f854dde 2023-01-04 stsp pw->pw_gid);
1938 13b2bc37 2022-10-23 stsp if (fd == -1) {
1939 13b2bc37 2022-10-23 stsp fatal("cannot listen on unix socket %s",
1940 13b2bc37 2022-10-23 stsp gotd.unix_socket_path);
1942 5e25db14 2022-12-29 stsp } else if (proc_id == PROC_AUTH) {
1943 5e25db14 2022-12-29 stsp snprintf(title, sizeof(title), "%s %s",
1944 5e25db14 2022-12-29 stsp gotd_proc_names[proc_id], repo_path);
1945 ae7c1b78 2023-01-10 stsp } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE ||
1946 b0614828 2023-06-19 stsp proc_id == PROC_SESSION_READ || proc_id == PROC_SESSION_WRITE) {
1947 13b2bc37 2022-10-23 stsp error = got_repo_pack_fds_open(&pack_fds);
1948 13b2bc37 2022-10-23 stsp if (error != NULL)
1949 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
1950 13b2bc37 2022-10-23 stsp error = got_repo_temp_fds_open(&temp_fds);
1951 13b2bc37 2022-10-23 stsp if (error != NULL)
1952 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
1953 13b2bc37 2022-10-23 stsp if (repo_path == NULL)
1954 13b2bc37 2022-10-23 stsp fatalx("repository path not specified");
1955 13b2bc37 2022-10-23 stsp snprintf(title, sizeof(title), "%s %s",
1956 13b2bc37 2022-10-23 stsp gotd_proc_names[proc_id], repo_path);
1958 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
1960 13b2bc37 2022-10-23 stsp setproctitle("%s", title);
1961 13b2bc37 2022-10-23 stsp log_procinit(title);
1963 13b2bc37 2022-10-23 stsp /* Drop root privileges. */
1964 13b2bc37 2022-10-23 stsp if (setgid(pw->pw_gid) == -1)
1965 13b2bc37 2022-10-23 stsp fatal("setgid %d failed", pw->pw_gid);
1966 13b2bc37 2022-10-23 stsp if (setuid(pw->pw_uid) == -1)
1967 13b2bc37 2022-10-23 stsp fatal("setuid %d failed", pw->pw_uid);
1969 13b2bc37 2022-10-23 stsp event_init();
1971 13b2bc37 2022-10-23 stsp switch (proc_id) {
1972 13b2bc37 2022-10-23 stsp case PROC_GOTD:
1973 13b2bc37 2022-10-23 stsp #ifndef PROFILE
1974 ae7c1b78 2023-01-10 stsp /* "exec" promise will be limited to argv[0] via unveil(2). */
1975 ae7c1b78 2023-01-10 stsp if (pledge("stdio proc exec sendfd recvfd unveil", NULL) == -1)
1976 13b2bc37 2022-10-23 stsp err(1, "pledge");
1979 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
1980 d93ecf7d 2022-12-14 stsp #ifndef PROFILE
1981 77f619a8 2023-01-04 stsp if (pledge("stdio sendfd unix unveil", NULL) == -1)
1982 d93ecf7d 2022-12-14 stsp err(1, "pledge");
1985 77f619a8 2023-01-04 stsp * Ensure that AF_UNIX bind(2) cannot be used with any other
1986 77f619a8 2023-01-04 stsp * sockets by revoking all filesystem access via unveil(2).
1988 77f619a8 2023-01-04 stsp apply_unveil_none();
1990 40b85cca 2023-01-03 stsp listen_main(title, fd, gotd.connection_limits,
1991 40b85cca 2023-01-03 stsp gotd.nconnection_limits);
1992 d93ecf7d 2022-12-14 stsp /* NOTREACHED */
1994 5e25db14 2022-12-29 stsp case PROC_AUTH:
1995 5e25db14 2022-12-29 stsp #ifndef PROFILE
1996 44587340 2022-12-30 stsp if (pledge("stdio getpw recvfd unix unveil", NULL) == -1)
1997 5e25db14 2022-12-29 stsp err(1, "pledge");
2000 44587340 2022-12-30 stsp * We need the "unix" pledge promise for getpeername(2) only.
2001 44587340 2022-12-30 stsp * Ensure that AF_UNIX bind(2) cannot be used by revoking all
2002 44587340 2022-12-30 stsp * filesystem access via unveil(2). Access to password database
2003 44587340 2022-12-30 stsp * files will still work since "getpw" bypasses unveil(2).
2005 44587340 2022-12-30 stsp apply_unveil_none();
2007 5e25db14 2022-12-29 stsp auth_main(title, &gotd.repos, repo_path);
2008 5e25db14 2022-12-29 stsp /* NOTREACHED */
2010 b0614828 2023-06-19 stsp case PROC_SESSION_READ:
2011 b0614828 2023-06-19 stsp case PROC_SESSION_WRITE:
2012 ae7c1b78 2023-01-10 stsp #ifndef PROFILE
2014 ae7c1b78 2023-01-10 stsp * The "recvfd" promise is only needed during setup and
2015 ae7c1b78 2023-01-10 stsp * will be removed in a later pledge(2) call.
2017 ae7c1b78 2023-01-10 stsp if (pledge("stdio rpath wpath cpath recvfd sendfd fattr flock "
2018 ae7c1b78 2023-01-10 stsp "unveil", NULL) == -1)
2019 ae7c1b78 2023-01-10 stsp err(1, "pledge");
2021 b0614828 2023-06-19 stsp if (proc_id == PROC_SESSION_READ)
2022 b0614828 2023-06-19 stsp apply_unveil_repo_readonly(repo_path, 1);
2024 b0614828 2023-06-19 stsp apply_unveil_repo_readwrite(repo_path);
2025 ae7c1b78 2023-01-10 stsp session_main(title, repo_path, pack_fds, temp_fds,
2026 b0614828 2023-06-19 stsp &gotd.request_timeout, proc_id);
2027 ae7c1b78 2023-01-10 stsp /* NOTREACHED */
2029 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
2030 abe89edb 2023-11-16 stsp set_max_datasize();
2031 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2032 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2033 13b2bc37 2022-10-23 stsp err(1, "pledge");
2035 b0614828 2023-06-19 stsp apply_unveil_repo_readonly(repo_path, 0);
2036 eec68231 2022-12-14 stsp repo_read_main(title, repo_path, pack_fds, temp_fds);
2037 13b2bc37 2022-10-23 stsp /* NOTREACHED */
2039 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
2040 abe89edb 2023-11-16 stsp set_max_datasize();
2041 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2042 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2043 13b2bc37 2022-10-23 stsp err(1, "pledge");
2045 b0614828 2023-06-19 stsp apply_unveil_repo_readonly(repo_path, 0);
2046 9afa3de2 2023-04-04 stsp repo = gotd_find_repo_by_path(repo_path, &gotd);
2047 9afa3de2 2023-04-04 stsp if (repo == NULL)
2048 9afa3de2 2023-04-04 stsp fatalx("no repository for path %s", repo_path);
2049 9afa3de2 2023-04-04 stsp repo_write_main(title, repo_path, pack_fds, temp_fds,
2050 9afa3de2 2023-04-04 stsp &repo->protected_tag_namespaces,
2051 9afa3de2 2023-04-04 stsp &repo->protected_branch_namespaces,
2052 9afa3de2 2023-04-04 stsp &repo->protected_branches);
2053 13b2bc37 2022-10-23 stsp /* NOTREACHED */
2056 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
2059 13b2bc37 2022-10-23 stsp if (proc_id != PROC_GOTD)
2060 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
2062 839338f6 2023-06-22 op evtimer_set(&gotd.listen_proc->tmo, kill_proc_timeout,
2063 839338f6 2023-06-22 op gotd.listen_proc);
2065 ae7c1b78 2023-01-10 stsp apply_unveil_selfexec();
2067 13b2bc37 2022-10-23 stsp signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2068 13b2bc37 2022-10-23 stsp signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2069 13b2bc37 2022-10-23 stsp signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2070 13b2bc37 2022-10-23 stsp signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2071 839338f6 2023-06-22 op signal_set(&evsigchld, SIGCHLD, gotd_sighdlr, NULL);
2072 13b2bc37 2022-10-23 stsp signal(SIGPIPE, SIG_IGN);
2074 13b2bc37 2022-10-23 stsp signal_add(&evsigint, NULL);
2075 13b2bc37 2022-10-23 stsp signal_add(&evsigterm, NULL);
2076 13b2bc37 2022-10-23 stsp signal_add(&evsighup, NULL);
2077 13b2bc37 2022-10-23 stsp signal_add(&evsigusr1, NULL);
2078 839338f6 2023-06-22 op signal_add(&evsigchld, NULL);
2080 c929736a 2023-06-22 op gotd_imsg_event_add(&gotd.listen_proc->iev);
2082 13b2bc37 2022-10-23 stsp event_dispatch();
2084 13b2bc37 2022-10-23 stsp free(repo_path);
2085 ae7c1b78 2023-01-10 stsp gotd_shutdown();