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[thirdparty/systemd.git] / src / core / socket.c
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db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
a7334b09 2
e8da24a6 3#include <arpa/inet.h>
83c60c9f 4#include <fcntl.h>
1cf40697 5#include <linux/sctp.h>
916abb21 6#include <mqueue.h>
e8da24a6 7#include <netinet/tcp.h>
e8da24a6
LP		 8#include <sys/stat.h>
9#include <unistd.h>
83c60c9f 10
836e4e7e
DDM		 11#include "sd-bus.h"
12
b5efdb8a 13#include "alloc-util.h"
836e4e7e 14#include "bpf-program.h"
e8da24a6 15#include "bus-error.h"
e8da24a6
LP		 16#include "copy.h"
17#include "dbus-socket.h"
6fcbec6f 18#include "dbus-unit.h"
86e045ec 19#include "errno-list.h"
836e4e7e 20#include "errno-util.h"
e8da24a6 21#include "exit-status.h"
836e4e7e 22#include "extract-word.h"
3ffd4af2 23#include "fd-util.h"
836e4e7e 24#include "fdset.h"
f97b34a6 25#include "format-util.h"
836e4e7e
DDM		 26#include "fs-util.h"
27#include "glyph-util.h"
a79279c7 28#include "in-addr-util.h"
60d9771c 29#include "io-util.h"
da96ad5a 30#include "ip-protocol-list.h"
83c60c9f 31#include "log.h"
4ea4abb6 32#include "manager.h"
35cd0ba5 33#include "mkdir-label.h"
836e4e7e 34#include "namespace-util.h"
6bedfcbb 35#include "parse-util.h"
9eb977db 36#include "path-util.h"
5d873679 37#include "pidfd-util.h"
7b3e062c 38#include "process-util.h"
80706c32 39#include "recurse-dir.h"
d7b8eec7 40#include "selinux-util.h"
d68c645b 41#include "serialize.h"
a243128d 42#include "service.h"
836e4e7e
DDM		 43#include "set.h"
44#include "siphash24.h"
e8da24a6 45#include "smack-util.h"
d68c645b 46#include "socket.h"
5c3fa98d 47#include "socket-netlink.h"
e8da24a6 48#include "special.h"
8b43440b 49#include "string-table.h"
07630cea 50#include "string-util.h"
e8da24a6 51#include "strv.h"
e8da24a6 52#include "unit.h"
1cf40697 53#include "unit-name.h"
b1d4f8e1 54#include "user-util.h"
83c60c9f 55
836e4e7e 56typedef struct SocketPeer {
166cf510
ZJS		 57 unsigned n_ref;
58
59 Socket *socket;
60 union sockaddr_union peer;
41733ae1 61 socklen_t peer_salen;
48930a5d 62 struct ucred peer_cred;
836e4e7e 63} SocketPeer;
166cf510 64
acbb0225 65static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
17f6b640
YW		 66 [SOCKET_DEAD] = UNIT_INACTIVE,
67 [SOCKET_START_PRE] = UNIT_ACTIVATING,
58a86a15 68 [SOCKET_START_OPEN] = UNIT_ACTIVATING,
17f6b640
YW		 69 [SOCKET_START_CHOWN] = UNIT_ACTIVATING,
70 [SOCKET_START_POST] = UNIT_ACTIVATING,
71 [SOCKET_LISTENING] = UNIT_ACTIVE,
72 [SOCKET_RUNNING] = UNIT_ACTIVE,
73 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
87f0e418
LP		 74 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
75 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
17f6b640
YW		 76 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
77 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
78 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
79 [SOCKET_FAILED] = UNIT_FAILED,
80 [SOCKET_CLEANING] = UNIT_MAINTENANCE,
83c60c9f 81};
5cb5a6ff 82
718db961
LP		 83static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
84static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
85
6b09c99c
YW		 86static bool SOCKET_STATE_WITH_PROCESS(SocketState state) {
87 return IN_SET(state,
88 SOCKET_START_PRE,
89 SOCKET_START_CHOWN,
90 SOCKET_START_POST,
91 SOCKET_STOP_PRE,
92 SOCKET_STOP_PRE_SIGTERM,
93 SOCKET_STOP_PRE_SIGKILL,
94 SOCKET_STOP_POST,
95 SOCKET_FINAL_SIGTERM,
96 SOCKET_FINAL_SIGKILL,
97 SOCKET_CLEANING);
98}
99
4c523d62
MY		 100static bool SOCKET_SERVICE_IS_ACTIVE(Service *s, bool allow_finalize) {
101 assert(s);
102
103 /* If unit_active_state() reports inactive/failed then it's all good, otherwise we need to
104 * manually exclude SERVICE_AUTO_RESTART and SERVICE_AUTO_RESTART_QUEUED, in which cases
105 * the start job hasn't been enqueued/run, but are only placeholders in order to allow
106 * canceling auto restart. */
107
108 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(UNIT(s))))
109 return false;
110
111 if (IN_SET(s->state, SERVICE_AUTO_RESTART, SERVICE_AUTO_RESTART_QUEUED))
112 return false;
113
114 if (allow_finalize && IN_SET(s->state, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, SERVICE_CLEANING))
115 return false;
116
117 return true;
118}
119
a16e1123 120static void socket_init(Unit *u) {
80706c32 121 Socket *s = ASSERT_PTR(SOCKET(u));
a16e1123 122
ac155bb8 123 assert(u->load_state == UNIT_STUB);
a16e1123 124
768fcd77 125 s->backlog = SOMAXCONN_DELUXE;
c9e120e0 126 s->timeout_usec = u->manager->defaults.timeout_start_usec;
a16e1123 127 s->directory_mode = 0755;
9131f660 128 s->socket_mode = 0666;
a16e1123 129
6cf6bbc2
LP		 130 s->max_connections = 64;
131
5c12797f 132 s->pass_rights = true; /* defaults to enabled in kernel */
4fd5948e 133 s->priority = -1;
4fd5948e
LP		 134 s->ip_tos = -1;
135 s->ip_ttl = -1;
4fd5948e 136 s->mark = -1;
4fd5948e 137
c9e120e0
LP		 138 s->exec_context.std_output = u->manager->defaults.std_output;
139 s->exec_context.std_error = u->manager->defaults.std_error;
085afe36 140
43a19142 141 s->control_pid = PIDREF_NULL;
a16e1123 142 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
8b26cdbd 143
fed25720 144 s->trigger_limit = RATELIMIT_OFF;
2bec84e7 145
14702b9c 146 s->poll_limit = RATELIMIT_OFF;
a16e1123 147}
acbb0225 148
5e94833f
LP		 149static void socket_unwatch_control_pid(Socket *s) {
150 assert(s);
ea1e0bf1 151 unit_unwatch_pidref_done(UNIT(s), &s->control_pid);
5e94833f
LP		 152}
153
80706c32 154static void socket_port_close_auxiliary_fds(SocketPort *p) {
3ffd4af2 155 assert(p);
15087cdb 156
3ffd4af2 157 close_many(p->auxiliary_fds, p->n_auxiliary_fds);
15087cdb
PS		 158 p->auxiliary_fds = mfree(p->auxiliary_fds);
159 p->n_auxiliary_fds = 0;
160}
161
80706c32 162SocketPort* socket_port_free(SocketPort *p) {
f8b21a08
FS		 163 if (!p)
164 return NULL;
165
166 sd_event_source_unref(p->event_source);
167
80706c32 168 socket_port_close_auxiliary_fds(p);
f8b21a08
FS		 169 safe_close(p->fd);
170 free(p->path);
171
172 return mfree(p);
173}
174
74051b9b 175void socket_free_ports(Socket *s) {
034c6ed7
LP		 176 assert(s);
177
9aad490e 178 LIST_CLEAR(port, s->ports, socket_port_free);
74051b9b
LP		 179}
180
181static void socket_done(Unit *u) {
e9fa1bf7 182 Socket *s = ASSERT_PTR(SOCKET(u));
9d565427 183 SocketPeer *p;
74051b9b 184
74051b9b 185 socket_free_ports(s);
034c6ed7 186
9a73653c 187 while ((p = set_steal_first(s->peers_by_address)))
9d565427
SS		 188 p->socket = NULL;
189
9a73653c 190 s->peers_by_address = set_free(s->peers_by_address);
9d565427 191
28135da3 192 s->exec_runtime = exec_runtime_free(s->exec_runtime);
9cc54544 193
e537352b 194 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 195 s->control_command = NULL;
196
5e94833f 197 socket_unwatch_control_pid(s);
034c6ed7 198
57020a3a 199 unit_ref_unset(&s->service);
034c6ed7 200
a1e58e8e
LP		 201 s->tcp_congestion = mfree(s->tcp_congestion);
202 s->bind_to_device = mfree(s->bind_to_device);
acbb0225 203
0a78712e
DM		 204 s->smack = mfree(s->smack);
205 s->smack_ip_in = mfree(s->smack_ip_in);
206 s->smack_ip_out = mfree(s->smack_ip_out);
0eb59ccf 207
811ba7a0
LP		 208 strv_free(s->symlinks);
209
0a78712e
DM		 210 s->user = mfree(s->user);
211 s->group = mfree(s->group);
3900e5fd 212
a97b23d6
DM		 213 s->fdname = mfree(s->fdname);
214
5dcadb4c 215 s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source);
718db961
LP		 216}
217
e9276800 218static int socket_arm_timer(Socket *s, bool relative, usec_t usec) {
718db961
LP		 219 assert(s);
220
e9276800 221 return unit_arm_timer(UNIT(s), &s->timer_event_source, relative, usec, socket_dispatch_timer);
5cb5a6ff
LP		 222}
223
4f2d528d 224static bool have_non_accept_socket(Socket *s) {
4f2d528d
LP		 225 assert(s);
226
227 if (!s->accept)
228 return true;
229
dd5ad9d4
LP		 230 LIST_FOREACH(port, p, s->ports) {
231
232 if (p->type != SOCKET_SOCKET)
233 return true;
234
4f2d528d
LP		 235 if (!socket_address_can_accept(&p->address))
236 return true;
dd5ad9d4 237 }
4f2d528d
LP		 238
239 return false;
240}
241
eef85c4a 242static int socket_add_mount_dependencies(Socket *s) {
6e2ef85b
LP		 243 int r;
244
245 assert(s);
6e2ef85b 246
a57f7e2c
LP		 247 LIST_FOREACH(port, p, s->ports) {
248 const char *path = NULL;
6e2ef85b 249
a57f7e2c
LP		 250 if (p->type == SOCKET_SOCKET)
251 path = socket_address_get_path(&p->address);
60252446 252 else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION))
a57f7e2c 253 path = p->path;
6e2ef85b 254
a57f7e2c
LP		 255 if (!path)
256 continue;
6e2ef85b 257
9e615fa3 258 r = unit_add_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_REQUIRES);
b87705cd 259 if (r < 0)
6e2ef85b 260 return r;
b87705cd 261 }
6e2ef85b
LP		 262
263 return 0;
264}
265
eef85c4a 266static int socket_add_device_dependencies(Socket *s) {
6e2ef85b 267 char *t;
6e2ef85b
LP		 268
269 assert(s);
270
7d0c710d 271 if (!s->bind_to_device || streq(s->bind_to_device, "lo"))
6e2ef85b
LP		 272 return 0;
273
63c372cb 274 t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device);
d336ba9f 275 return unit_add_node_dependency(UNIT(s), t, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE);
6e2ef85b
LP		 276}
277
a40eb732
LP		 278static int socket_add_default_dependencies(Socket *s) {
279 int r;
e9fa1bf7 280
a40eb732
LP		 281 assert(s);
282
4c9ea260
LP		 283 if (!UNIT(s)->default_dependencies)
284 return 0;
285
35d8c19a 286 r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, true, UNIT_DEPENDENCY_DEFAULT);
e3d84721
LP		 287 if (r < 0)
288 return r;
2a77d31d 289
463d0d15 290 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
3835b9aa 291 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT);
e3d84721 292 if (r < 0)
a40eb732 293 return r;
2a77d31d 294 }
a40eb732 295
3835b9aa 296 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT);
a40eb732
LP		 297}
298
d1e8e8b5 299static bool socket_has_exec(Socket *s) {
4cfc6dbe
LP		 300 assert(s);
301
42e9967b
MY		 302 FOREACH_ARRAY(i, s->exec_command, _SOCKET_EXEC_COMMAND_MAX)
303 if (*i)
4cfc6dbe
LP		 304 return true;
305
306 return false;
307}
308
e821075a 309static int socket_add_extras(Socket *s) {
e9fa1bf7 310 Unit *u = UNIT(ASSERT_PTR(s));
e537352b 311 int r;
44d8db9e 312
1f15ce28
LP		 313 /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit
314 * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept()
315 * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly
316 * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic
317 * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to
318 * process whatever is queued in one go, and thus should normally never have to be started frequently. This is
319 * different for Accept=yes where each connection is processed by a new service instance, and thus frequent
2bec84e7
LP		 320 * service starts are typical.
321 *
322 * For the poll limit we follow a similar rule, but use 3/4th of the trigger limit parameters, to
323 * trigger this earlier. */
1f15ce28
LP		 324
325 if (s->trigger_limit.interval == USEC_INFINITY)
326 s->trigger_limit.interval = 2 * USEC_PER_SEC;
2bec84e7
LP		 327 if (s->trigger_limit.burst == UINT_MAX)
328 s->trigger_limit.burst = s->accept ? 200 : 20;
1f15ce28 329
14702b9c
DDM		 330 if (s->poll_limit.interval == USEC_INFINITY)
331 s->poll_limit.interval = 2 * USEC_PER_SEC;
332 if (s->poll_limit.burst == UINT_MAX)
333 s->poll_limit.burst = s->accept ? 150 : 15;
1f15ce28 334
e821075a 335 if (have_non_accept_socket(s)) {
23a177ef 336
f220d989 337 if (!UNIT_ISSET(s->service)) {
e821075a 338 Unit *x;
57020a3a 339
e821075a 340 r = unit_load_related_unit(u, ".service", &x);
57020a3a 341 if (r < 0)
4f2d528d 342 return r;
e821075a 343
7f7d01ed 344 unit_ref_set(&s->service, u, x);
4f2d528d 345 }
44d8db9e 346
eef85c4a 347 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT);
e821075a 348 if (r < 0)
6e2ef85b 349 return r;
e821075a 350 }
6e2ef85b 351
eef85c4a 352 r = socket_add_mount_dependencies(s);
e821075a
LP		 353 if (r < 0)
354 return r;
6e2ef85b 355
eef85c4a 356 r = socket_add_device_dependencies(s);
e821075a
LP		 357 if (r < 0)
358 return r;
359
598459ce 360 r = unit_patch_contexts(u);
e821075a
LP		 361 if (r < 0)
362 return r;
363
364 if (socket_has_exec(s)) {
365 r = unit_add_exec_dependencies(u, &s->exec_context);
366 if (r < 0)
367 return r;
e821075a 368 }
a016b922 369
88af31f9
LP		 370 r = unit_set_default_slice(u);
371 if (r < 0)
372 return r;
373
4c9ea260
LP		 374 r = socket_add_default_dependencies(s);
375 if (r < 0)
376 return r;
e821075a
LP		 377
378 return 0;
379}
380
2fbdfe0b 381static const char* socket_find_symlink_target(Socket *s) {
811ba7a0 382 const char *found = NULL;
811ba7a0 383
2fbdfe0b
MY		 384 assert(s);
385
811ba7a0 386 LIST_FOREACH(port, p, s->ports) {
2fbdfe0b 387 const char *f;
811ba7a0
LP		 388
389 switch (p->type) {
390
391 case SOCKET_FIFO:
392 f = p->path;
393 break;
394
395 case SOCKET_SOCKET:
b9495e8d 396 f = socket_address_get_path(&p->address);
811ba7a0
LP		 397 break;
398
399 default:
2fbdfe0b 400 f = NULL;
811ba7a0
LP		 401 }
402
403 if (f) {
404 if (found)
405 return NULL;
406
407 found = f;
408 }
409 }
410
411 return found;
412}
413
e821075a
LP		 414static int socket_verify(Socket *s) {
415 assert(s);
75193d41 416 assert(UNIT(s)->load_state == UNIT_LOADED);
e821075a 417
d85ff944
YW		 418 if (!s->ports)
419 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing.");
e821075a 420
bca55058
MY		 421 if (s->max_connections <= 0)
422 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "MaxConnection= setting too small. Refusing.");
423
d85ff944
YW		 424 if (s->accept && have_non_accept_socket(s))
425 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing.");
e821075a 426
f220d989 427 if (s->accept && UNIT_ISSET(s->service))
d85ff944 428 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Explicit service configuration for accepting socket units not supported. Refusing.");
e821075a 429
d85ff944
YW		 430 if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s))
431 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has symlinks set but none or more than one node in the file system. Refusing.");
811ba7a0 432
e821075a
LP		 433 return 0;
434}
435
7a08d314 436static void peer_address_hash_func(const SocketPeer *s, struct siphash *state) {
9d565427
SS		 437 assert(s);
438
439 if (s->peer.sa.sa_family == AF_INET)
c01a5c05 440 siphash24_compress_typesafe(s->peer.in.sin_addr, state);
41733ae1 441 else if (s->peer.sa.sa_family == AF_INET6)
c01a5c05 442 siphash24_compress_typesafe(s->peer.in6.sin6_addr, state);
359a5bcf 443 else if (s->peer.sa.sa_family == AF_VSOCK)
c01a5c05 444 siphash24_compress_typesafe(s->peer.vm.svm_cid, state);
48930a5d
LP		 445 else if (s->peer.sa.sa_family == AF_UNIX)
446 siphash24_compress_typesafe(s->peer_cred.uid, state);
41733ae1 447 else
04499a70 448 assert_not_reached();
9d565427
SS		 449}
450
7a08d314 451static int peer_address_compare_func(const SocketPeer *x, const SocketPeer *y) {
a0edd02e 452 int r;
9d565427 453
a0edd02e
FB		 454 r = CMP(x->peer.sa.sa_family, y->peer.sa.sa_family);
455 if (r != 0)
456 return r;
9d565427 457
79893116 458 switch (x->peer.sa.sa_family) {
9d565427
SS		 459 case AF_INET:
460 return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr));
461 case AF_INET6:
462 return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr));
359a5bcf 463 case AF_VSOCK:
6dd91b36 464 return CMP(x->peer.vm.svm_cid, y->peer.vm.svm_cid);
48930a5d
LP		 465 case AF_UNIX:
466 return CMP(x->peer_cred.uid, y->peer_cred.uid);
9d565427 467 }
04499a70 468 assert_not_reached();
9d565427
SS		 469}
470
7a08d314 471DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops, SocketPeer, peer_address_hash_func, peer_address_compare_func);
9d565427 472
e821075a 473static int socket_load(Unit *u) {
e9fa1bf7 474 Socket *s = ASSERT_PTR(SOCKET(u));
e821075a
LP		 475 int r;
476
e821075a
LP		 477 assert(u->load_state == UNIT_STUB);
478
c3620770 479 r = unit_load_fragment_and_dropin(u, true);
e821075a
LP		 480 if (r < 0)
481 return r;
482
75193d41
ZJS		 483 if (u->load_state != UNIT_LOADED)
484 return 0;
485
486 /* This is a new unit? Then let's add in some extras */
487 r = socket_add_extras(s);
488 if (r < 0)
489 return r;
23a177ef 490
4f2d528d 491 return socket_verify(s);
44d8db9e
LP		 492}
493
2fbdfe0b 494static SocketPeer* socket_peer_dup(const SocketPeer *q) {
166cf510
ZJS		 495 SocketPeer *p;
496
48930a5d
LP		 497 assert(q);
498
000b61b9 499 p = new(SocketPeer, 1);
166cf510
ZJS		 500 if (!p)
501 return NULL;
502
000b61b9
LP		 503 *p = (SocketPeer) {
504 .n_ref = 1,
48930a5d
LP		 505 .peer = q->peer,
506 .peer_salen = q->peer_salen,
507 .peer_cred = q->peer_cred,
000b61b9 508 };
48930a5d 509
166cf510
ZJS		 510 return p;
511}
512
2fbdfe0b 513static SocketPeer* socket_peer_free(SocketPeer *p) {
8301aa0b 514 assert(p);
166cf510
ZJS		 515
516 if (p->socket)
517 set_remove(p->socket->peers_by_address, p);
518
519 return mfree(p);
520}
521
8301aa0b
YW		 522DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer, socket_peer, socket_peer_free);
523
a951c1ae 524int socket_acquire_peer(Socket *s, int fd, SocketPeer **ret) {
166cf510 525 _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL;
48930a5d 526 SocketPeer key = {
000b61b9 527 .peer_salen = sizeof(union sockaddr_union),
48930a5d 528 .peer_cred = UCRED_INVALID,
000b61b9 529 }, *i;
166cf510
ZJS		 530 int r;
531
166cf510 532 assert(s);
e9fa1bf7 533 assert(fd >= 0);
a951c1ae 534 assert(ret);
166cf510 535
48930a5d 536 if (getpeername(fd, &key.peer.sa, &key.peer_salen) < 0)
a951c1ae 537 return log_unit_error_errno(UNIT(s), errno, "getpeername() failed: %m");
166cf510 538
48930a5d
LP		 539 switch (key.peer.sa.sa_family) {
540 case AF_INET:
541 case AF_INET6:
542 case AF_VSOCK:
543 break;
544
545 case AF_UNIX:
546 r = getpeercred(fd, &key.peer_cred);
547 if (r < 0)
548 return log_unit_error_errno(UNIT(s), r, "Failed to get peer credentials of socket: %m");
549 break;
550
551 default:
a951c1ae 552 *ret = NULL;
166cf510
ZJS		 553 return 0;
554 }
555
48930a5d 556 i = set_get(s->peers_by_address, &key);
166cf510 557 if (i) {
a951c1ae 558 *ret = socket_peer_ref(i);
166cf510
ZJS		 559 return 1;
560 }
561
48930a5d 562 remote = socket_peer_dup(&key);
166cf510
ZJS		 563 if (!remote)
564 return log_oom();
565
a951c1ae 566 r = set_ensure_put(&s->peers_by_address, &peer_address_hash_ops, remote);
166cf510 567 if (r < 0)
a951c1ae 568 return log_unit_error_errno(UNIT(s), r, "Failed to insert peer info into hash table: %m");
166cf510
ZJS		 569
570 remote->socket = s;
571
a951c1ae 572 *ret = TAKE_PTR(remote);
166cf510
ZJS		 573 return 1;
574}
575
d1e8e8b5 576static const char* listen_lookup(int family, int type) {
7a22745a
LP		 577
578 if (family == AF_NETLINK)
579 return "ListenNetlink";
542563ba
LP		 580
581 if (type == SOCK_STREAM)
582 return "ListenStream";
583 else if (type == SOCK_DGRAM)
584 return "ListenDatagram";
585 else if (type == SOCK_SEQPACKET)
586 return "ListenSequentialPacket";
587
04499a70 588 assert_not_reached();
542563ba
LP		 589}
590
87f0e418 591static void socket_dump(Unit *u, FILE *f, const char *prefix) {
e9fa1bf7 592 Socket *s = ASSERT_PTR(SOCKET(u));
827d9bf2 593 const char *prefix2, *str;
5cb5a6ff 594
fa068367 595 assert(f);
5cb5a6ff 596
4c940960 597 prefix = strempty(prefix);
63c372cb 598 prefix2 = strjoina(prefix, "\t");
c43d20a0 599
5cb5a6ff
LP		 600 fprintf(f,
601 "%sSocket State: %s\n"
81a5c6d0 602 "%sResult: %s\n"
c968d76a 603 "%sClean Result: %s\n"
542563ba 604 "%sBindIPv6Only: %s\n"
b5a0699f
LP		 605 "%sBacklog: %u\n"
606 "%sSocketMode: %04o\n"
4fd5948e
LP		 607 "%sDirectoryMode: %04o\n"
608 "%sKeepAlive: %s\n"
4427c3f4 609 "%sNoDelay: %s\n"
cebf8b20 610 "%sFreeBind: %s\n"
6b6d2dee 611 "%sTransparent: %s\n"
ec6370a2 612 "%sBroadcast: %s\n"
ede3deb4 613 "%sPassCredentials: %s\n"
35462aa1 614 "%sPassPIDFD: %s\n"
54ecda32 615 "%sPassSecurity: %s\n"
a3d19f5d 616 "%sPassPacketInfo: %s\n"
5c12797f 617 "%sAcceptFileDescriptors: %s\n"
bd1fe7c7 618 "%sTCPCongestion: %s\n"
16115b0a 619 "%sRemoveOnStop: %s\n"
55301ec0 620 "%sWritable: %s\n"
827d9bf2 621 "%sFileDescriptorName: %s\n"
b36ab0d4 622 "%sPassFileDescriptorsToExec: %s\n"
16115b0a 623 "%sSELinuxContextFromNet: %s\n",
a16e1123 624 prefix, socket_state_to_string(s->state),
81a5c6d0 625 prefix, socket_result_to_string(s->result),
c968d76a 626 prefix, socket_result_to_string(s->clean_result),
c0120d99 627 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 628 prefix, s->backlog,
629 prefix, s->socket_mode,
4fd5948e
LP		 630 prefix, s->directory_mode,
631 prefix, yes_no(s->keep_alive),
4427c3f4 632 prefix, yes_no(s->no_delay),
cebf8b20 633 prefix, yes_no(s->free_bind),
6b6d2dee 634 prefix, yes_no(s->transparent),
ec6370a2 635 prefix, yes_no(s->broadcast),
d68af586 636 prefix, yes_no(s->pass_cred),
35462aa1 637 prefix, yes_no(s->pass_pidfd),
54ecda32 638 prefix, yes_no(s->pass_sec),
a3d19f5d 639 prefix, yes_no(s->pass_pktinfo),
5c12797f 640 prefix, yes_no(s->pass_rights),
bd1fe7c7 641 prefix, strna(s->tcp_congestion),
16115b0a 642 prefix, yes_no(s->remove_on_stop),
55301ec0 643 prefix, yes_no(s->writable),
8dd4c05b 644 prefix, socket_fdname(s),
b36ab0d4 645 prefix, yes_no(s->pass_fds_to_exec),
16115b0a 646 prefix, yes_no(s->selinux_context_from_net));
542563ba 647
9b191525
LP		 648 if (s->timestamping != SOCKET_TIMESTAMPING_OFF)
649 fprintf(f,
650 "%sTimestamping: %s\n",
651 prefix, socket_timestamping_to_string(s->timestamping));
652
43a19142 653 if (pidref_is_set(&s->control_pid))
70123e68 654 fprintf(f,
de0671ee 655 "%sControl PID: "PID_FMT"\n",
43a19142 656 prefix, s->control_pid.pid);
70123e68 657
acbb0225
LP		 658 if (s->bind_to_device)
659 fprintf(f,
660 "%sBindToDevice: %s\n",
661 prefix, s->bind_to_device);
662
4f2d528d
LP		 663 if (s->accept)
664 fprintf(f,
6cf6bbc2
LP		 665 "%sAccepted: %u\n"
666 "%sNConnections: %u\n"
827d9bf2
YW		 667 "%sMaxConnections: %u\n"
668 "%sMaxConnectionsPerSource: %u\n",
6cf6bbc2
LP		 669 prefix, s->n_accepted,
670 prefix, s->n_connections,
827d9bf2
YW		 671 prefix, s->max_connections,
672 prefix, s->max_connections_per_source);
3e5f04bf
RM		 673 else
674 fprintf(f,
675 "%sFlushPending: %s\n",
676 prefix, yes_no(s->flush_pending));
677
4fd5948e
LP		 678 if (s->priority >= 0)
679 fprintf(f,
680 "%sPriority: %i\n",
681 prefix, s->priority);
682
683 if (s->receive_buffer > 0)
684 fprintf(f,
685 "%sReceiveBuffer: %zu\n",
686 prefix, s->receive_buffer);
687
688 if (s->send_buffer > 0)
689 fprintf(f,
690 "%sSendBuffer: %zu\n",
691 prefix, s->send_buffer);
692
693 if (s->ip_tos >= 0)
694 fprintf(f,
695 "%sIPTOS: %i\n",
696 prefix, s->ip_tos);
697
698 if (s->ip_ttl >= 0)
699 fprintf(f,
700 "%sIPTTL: %i\n",
701 prefix, s->ip_ttl);
702
703 if (s->pipe_size > 0)
704 fprintf(f,
705 "%sPipeSize: %zu\n",
706 prefix, s->pipe_size);
707
708 if (s->mark >= 0)
709 fprintf(f,
710 "%sMark: %i\n",
711 prefix, s->mark);
712
916abb21
LP		 713 if (s->mq_maxmsg > 0)
714 fprintf(f,
715 "%sMessageQueueMaxMessages: %li\n",
716 prefix, s->mq_maxmsg);
717
718 if (s->mq_msgsize > 0)
719 fprintf(f,
720 "%sMessageQueueMessageSize: %li\n",
721 prefix, s->mq_msgsize);
722
718db961 723 if (s->reuse_port)
f7db7a69
SL		 724 fprintf(f,
725 "%sReusePort: %s\n",
718db961 726 prefix, yes_no(s->reuse_port));
f7db7a69 727
0eb59ccf
AK		 728 if (s->smack)
729 fprintf(f,
730 "%sSmackLabel: %s\n",
731 prefix, s->smack);
732
733 if (s->smack_ip_in)
734 fprintf(f,
735 "%sSmackLabelIPIn: %s\n",
736 prefix, s->smack_ip_in);
737
738 if (s->smack_ip_out)
739 fprintf(f,
740 "%sSmackLabelIPOut: %s\n",
741 prefix, s->smack_ip_out);
742
3900e5fd
LP		 743 if (!isempty(s->user) || !isempty(s->group))
744 fprintf(f,
d2a50e3b
LP		 745 "%sSocketUser: %s\n"
746 "%sSocketGroup: %s\n",
3900e5fd
LP		 747 prefix, strna(s->user),
748 prefix, strna(s->group));
749
7bbfcf64 750 if (timestamp_is_set(s->keep_alive_time))
209e9dcd 751 fprintf(f,
3cd761e4 752 "%sKeepAliveTimeSec: %s\n",
5291f26d 753 prefix, FORMAT_TIMESPAN(s->keep_alive_time, USEC_PER_SEC));
209e9dcd 754
7be9df7d 755 if (s->keep_alive_interval > 0)
209e9dcd 756 fprintf(f,
3cd761e4 757 "%sKeepAliveIntervalSec: %s\n",
5291f26d 758 prefix, FORMAT_TIMESPAN(s->keep_alive_interval, USEC_PER_SEC));
209e9dcd 759
7be9df7d 760 if (s->keep_alive_cnt > 0)
209e9dcd
SS		 761 fprintf(f,
762 "%sKeepAliveProbes: %u\n",
763 prefix, s->keep_alive_cnt);
764
7be9df7d 765 if (s->defer_accept > 0)
cc567c9b 766 fprintf(f,
3cd761e4 767 "%sDeferAcceptSec: %s\n",
5291f26d 768 prefix, FORMAT_TIMESPAN(s->defer_accept, USEC_PER_SEC));
cc567c9b 769
034c6ed7 770 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 771
7be9df7d
YW		 772 switch (p->type) {
773 case SOCKET_SOCKET: {
774 _cleanup_free_ char *k = NULL;
542563ba 775 int r;
542563ba 776
e53fc357 777 r = socket_address_print(&p->address, &k);
38553034
ZJS		 778 if (r < 0) {
779 errno = -r;
780 fprintf(f, "%s%s: %m\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type));
781 } else
782 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), k);
7be9df7d
YW		 783 break;
784 }
785 case SOCKET_SPECIAL:
b0a3f2bc 786 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
7be9df7d
YW		 787 break;
788 case SOCKET_USB_FUNCTION:
60252446 789 fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path);
7be9df7d
YW		 790 break;
791 case SOCKET_MQUEUE:
916abb21 792 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
7be9df7d
YW		 793 break;
794 default:
542563ba 795 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
7be9df7d 796 }
542563ba 797 }
5cb5a6ff 798
1745fa70
EV		 799 fprintf(f,
800 "%sTriggerLimitIntervalSec: %s\n"
2bec84e7
LP		 801 "%sTriggerLimitBurst: %u\n"
802 "%sPollLimitIntervalSec: %s\n"
803 "%sPollLimitBurst: %u\n",
5291f26d 804 prefix, FORMAT_TIMESPAN(s->trigger_limit.interval, USEC_PER_SEC),
2bec84e7 805 prefix, s->trigger_limit.burst,
14702b9c
DDM		 806 prefix, FORMAT_TIMESPAN(s->poll_limit.interval, USEC_PER_SEC),
807 prefix, s->poll_limit.burst);
1745fa70 808
da96ad5a 809 str = ip_protocol_to_name(s->socket_protocol);
827d9bf2
YW		 810 if (str)
811 fprintf(f, "%sSocketProtocol: %s\n", prefix, str);
812
813 if (!strv_isempty(s->symlinks)) {
827d9bf2
YW		 814 fprintf(f, "%sSymlinks:", prefix);
815 STRV_FOREACH(q, s->symlinks)
816 fprintf(f, " %s", *q);
817
818 fprintf(f, "\n");
819 }
820
821 fprintf(f,
822 "%sTimeoutSec: %s\n",
5291f26d 823 prefix, FORMAT_TIMESPAN(s->timeout_usec, USEC_PER_SEC));
827d9bf2 824
5cb5a6ff 825 exec_context_dump(&s->exec_context, f, prefix);
4819ff03 826 kill_context_dump(&s->kill_context, f, prefix);
5cb5a6ff 827
6c1abe88 828 for (SocketExecCommand c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 829 if (!s->exec_command[c])
830 continue;
5cb5a6ff 831
3a7bb5c9 832 fprintf(f, "%s%s %s:\n",
1ae9b0cf 833 prefix, glyph(GLYPH_ARROW_RIGHT), socket_exec_command_to_string(c));
c43d20a0
LP		 834
835 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 836 }
18f573aa 837
bc0623df 838 cgroup_context_dump(UNIT(s), f, prefix);
5cb5a6ff
LP		 839}
840
9be6e184
LP		 841static int instance_from_socket(
842 int fd,
843 unsigned nr,
844 char **ret) {
845
9d16d0c7 846 union sockaddr_union local, remote;
5d873679
MY		 847 socklen_t l;
848 int r;
4f2d528d
LP		 849
850 assert(fd >= 0);
5d873679 851 assert(ret);
4f2d528d
LP		 852
853 l = sizeof(local);
854 if (getsockname(fd, &local.sa, &l) < 0)
855 return -errno;
856
857 l = sizeof(remote);
858 if (getpeername(fd, &remote.sa, &l) < 0)
859 return -errno;
860
9be6e184
LP		 861 uint64_t cookie;
862 r = socket_get_cookie(fd, &cookie);
863 if (r < 0)
864 return r;
865
5d873679
MY		 866 char *s;
867
4f2d528d
LP		 868 switch (local.sa.sa_family) {
869
870 case AF_INET: {
871 uint32_t
8e38570e
LP		 872 a = be32toh(local.in.sin_addr.s_addr),
873 b = be32toh(remote.in.sin_addr.s_addr);
4f2d528d 874
5d873679 875 if (asprintf(&s,
9be6e184 876 "%u-%" PRIu64 "-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
77b088c2 877 nr,
9be6e184 878 cookie,
4f2d528d 879 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
8e38570e 880 be16toh(local.in.sin_port),
4f2d528d 881 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
8e38570e 882 be16toh(remote.in.sin_port)) < 0)
4f2d528d
LP		 883 return -ENOMEM;
884
885 break;
886 }
887
888 case AF_INET6: {
c65a0b14 889 static const unsigned char ipv4_prefix[] = {
2b061f5a
LP		 890 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
891 };
892
893 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
894 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
895 const uint8_t
896 *a = local.in6.sin6_addr.s6_addr+12,
897 *b = remote.in6.sin6_addr.s6_addr+12;
898
5d873679 899 if (asprintf(&s,
9be6e184 900 "%u-%" PRIu64 "-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
77b088c2 901 nr,
9be6e184 902 cookie,
2b061f5a 903 a[0], a[1], a[2], a[3],
8e38570e 904 be16toh(local.in6.sin6_port),
2b061f5a 905 b[0], b[1], b[2], b[3],
8e38570e 906 be16toh(remote.in6.sin6_port)) < 0)
2b061f5a
LP		 907 return -ENOMEM;
908 } else {
5d873679 909 if (asprintf(&s,
9be6e184 910 "%u-%" PRIu64 "-%s:%u-%s:%u",
77b088c2 911 nr,
9be6e184 912 cookie,
071e522e 913 IN6_ADDR_TO_STRING(&local.in6.sin6_addr),
8e38570e 914 be16toh(local.in6.sin6_port),
071e522e 915 IN6_ADDR_TO_STRING(&remote.in6.sin6_addr),
8e38570e 916 be16toh(remote.in6.sin6_port)) < 0)
2b061f5a
LP		 917 return -ENOMEM;
918 }
4f2d528d
LP		 919
920 break;
921 }
922
923 case AF_UNIX: {
924 struct ucred ucred;
925
5d873679
MY		 926 r = getpeercred(fd, &ucred);
927 if (r >= 0) {
928 _cleanup_close_ int pidfd = getpeerpidfd(fd);
929 uint64_t pidfd_id;
930
931 if (pidfd >= 0 && pidfd_get_inode_id(pidfd, &pidfd_id) >= 0)
9be6e184
LP		 932 r = asprintf(&s, "%u-%" PRIu64 "-" PID_FMT "_%" PRIu64 "-" UID_FMT,
933 nr, cookie, ucred.pid, pidfd_id, ucred.uid);
5d873679 934 else
9be6e184
LP		 935 r = asprintf(&s, "%u-%" PRIu64 "-" PID_FMT "-" UID_FMT,
936 nr, cookie, ucred.pid, ucred.uid);
5d873679 937 if (r < 0)
d38f6e34 938 return -ENOMEM;
5d873679
MY		 939 } else if (r == -ENODATA) {
940 /* This handles the case where somebody is connecting from another pid/uid namespace
d38f6e34 941 * (e.g. from outside of our container). */
5d873679 942 if (asprintf(&s,
9be6e184
LP		 943 "%u-%" PRIu64 "-unknown",
944 nr,
945 cookie) < 0)
d38f6e34
ZJS		 946 return -ENOMEM;
947 } else
5d873679 948 return r;
2f20a8eb 949
2f20a8eb 950 break;
4f2d528d
LP		 951 }
952
359a5bcf 953 case AF_VSOCK:
5d873679 954 if (asprintf(&s,
9be6e184 955 "%u-%" PRIu64 "-%u:%u-%u:%u",
359a5bcf 956 nr,
9be6e184 957 cookie,
359a5bcf
SH		 958 local.vm.svm_cid, local.vm.svm_port,
959 remote.vm.svm_cid, remote.vm.svm_port) < 0)
960 return -ENOMEM;
961
962 break;
963
4f2d528d 964 default:
04499a70 965 assert_not_reached();
4f2d528d
LP		 966 }
967
5d873679 968 *ret = s;
4f2d528d
LP		 969 return 0;
970}
971
034c6ed7 972static void socket_close_fds(Socket *s) {
83c60c9f
LP		 973 assert(s);
974
034c6ed7 975 LIST_FOREACH(port, p, s->ports) {
80706c32 976 bool was_open = p->fd >= 0;
83c60c9f 977
5dcadb4c 978 p->event_source = sd_event_source_disable_unref(p->event_source);
03e334a1 979 p->fd = safe_close(p->fd);
80706c32 980 socket_port_close_auxiliary_fds(p);
a16e1123 981
18e854f8
LP		 982 /* One little note: we should normally not delete any sockets in the file system here! After all some
983 * other process we spawned might still have a reference of this fd and wants to continue to use
984 * it. Therefore we normally delete sockets in the file system before we create a new one, not after we
985 * stopped using one! That all said, if the user explicitly requested this, we'll delete them here
986 * anyway, but only then. */
bd1fe7c7 987
18e854f8
LP		 988 if (!was_open || !s->remove_on_stop)
989 continue;
990
991 switch (p->type) {
bd1fe7c7 992
18e854f8
LP		 993 case SOCKET_FIFO:
994 (void) unlink(p->path);
995 break;
bd1fe7c7 996
18e854f8
LP		 997 case SOCKET_MQUEUE:
998 (void) mq_unlink(p->path);
999 break;
bd1fe7c7 1000
18e854f8
LP		 1001 case SOCKET_SOCKET:
1002 (void) socket_address_unlink(&p->address);
1003 break;
bd1fe7c7 1004
18e854f8 1005 default:
2fbdfe0b 1006 ;
bd1fe7c7 1007 }
83c60c9f 1008 }
811ba7a0
LP		 1009
1010 if (s->remove_on_stop)
1011 STRV_FOREACH(i, s->symlinks)
18e854f8 1012 (void) unlink(*i);
75db809a
ZJS		 1013
1014 /* Note that we don't return NULL here, since s has not been freed. */
83c60c9f
LP		 1015}
1016
2fbdfe0b
MY		 1017DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket*, socket_close_fds, NULL);
1018
b81a14b9
MY		 1019#define SOCKET_OPTION_WARNING_FORMAT_STR "Failed to set %s socket option, ignoring: %m"
1020#define log_socket_option_warning_errno(s, error, option) \
1021 log_unit_warning_errno(UNIT(s), (error), SOCKET_OPTION_WARNING_FORMAT_STR, STRINGIFY(option))
1022
5d0fe423 1023static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) {
d53e386d
LP		 1024 int r;
1025
4fd5948e 1026 assert(s);
5d0fe423 1027 assert(p);
4fd5948e
LP		 1028 assert(fd >= 0);
1029
1030 if (s->keep_alive) {
2ff48e98
LP		 1031 r = setsockopt_int(fd, SOL_SOCKET, SO_KEEPALIVE, true);
1032 if (r < 0)
b81a14b9 1033 log_socket_option_warning_errno(s, r, SO_KEEPALIVE);
4fd5948e
LP		 1034 }
1035
7bbfcf64 1036 if (timestamp_is_set(s->keep_alive_time)) {
9e5b6496
YW		 1037 r = setsockopt_int(fd, SOL_TCP, TCP_KEEPIDLE, s->keep_alive_time / USEC_PER_SEC);
1038 if (r < 0)
b81a14b9 1039 log_socket_option_warning_errno(s, r, TCP_KEEPIDLE);
209e9dcd
SS		 1040 }
1041
7be9df7d 1042 if (s->keep_alive_interval > 0) {
9e5b6496
YW		 1043 r = setsockopt_int(fd, SOL_TCP, TCP_KEEPINTVL, s->keep_alive_interval / USEC_PER_SEC);
1044 if (r < 0)
b81a14b9 1045 log_socket_option_warning_errno(s, r, TCP_KEEPINTVL);
209e9dcd
SS		 1046 }
1047
7be9df7d 1048 if (s->keep_alive_cnt > 0) {
9e5b6496
YW		 1049 r = setsockopt_int(fd, SOL_TCP, TCP_KEEPCNT, s->keep_alive_cnt);
1050 if (r < 0)
b81a14b9 1051 log_socket_option_warning_errno(s, r, TCP_KEEPCNT);
209e9dcd
SS		 1052 }
1053
7be9df7d 1054 if (s->defer_accept > 0) {
9e5b6496
YW		 1055 r = setsockopt_int(fd, SOL_TCP, TCP_DEFER_ACCEPT, s->defer_accept / USEC_PER_SEC);
1056 if (r < 0)
b81a14b9 1057 log_socket_option_warning_errno(s, r, TCP_DEFER_ACCEPT);
cc567c9b
SS		 1058 }
1059
4427c3f4 1060 if (s->no_delay) {
62bc4efc 1061 if (s->socket_protocol == IPPROTO_SCTP) {
2ff48e98
LP		 1062 r = setsockopt_int(fd, SOL_SCTP, SCTP_NODELAY, true);
1063 if (r < 0)
b81a14b9 1064 log_socket_option_warning_errno(s, r, SCTP_NODELAY);
62bc4efc 1065 } else {
2ff48e98
LP		 1066 r = setsockopt_int(fd, SOL_TCP, TCP_NODELAY, true);
1067 if (r < 0)
b81a14b9 1068 log_socket_option_warning_errno(s, r, TCP_NODELAY);
62bc4efc 1069 }
4427c3f4
SS		 1070 }
1071
ec6370a2 1072 if (s->broadcast) {
2ff48e98
LP		 1073 r = setsockopt_int(fd, SOL_SOCKET, SO_BROADCAST, true);
1074 if (r < 0)
b81a14b9 1075 log_socket_option_warning_errno(s, r, SO_BROADCAST);
ec6370a2
LP		 1076 }
1077
d68af586 1078 if (s->pass_cred) {
2ff48e98
LP		 1079 r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
1080 if (r < 0)
b81a14b9 1081 log_socket_option_warning_errno(s, r, SO_PASSCRED);
d68af586
MS		 1082 }
1083
35462aa1
MY		 1084 if (s->pass_pidfd) {
1085 r = setsockopt_int(fd, SOL_SOCKET, SO_PASSPIDFD, true);
1086 if (r < 0)
1087 log_unit_full_errno(UNIT(s), ERRNO_IS_NEG_NOT_SUPPORTED(r) ? LOG_DEBUG : LOG_WARNING, r,
1088 SOCKET_OPTION_WARNING_FORMAT_STR, "SO_PASSPIDFD");
1089 }
1090
54ecda32 1091 if (s->pass_sec) {
2ff48e98
LP		 1092 r = setsockopt_int(fd, SOL_SOCKET, SO_PASSSEC, true);
1093 if (r < 0)
b81a14b9
MY		 1094 log_unit_full_errno(UNIT(s), ERRNO_IS_NEG_NOT_SUPPORTED(r) ? LOG_DEBUG : LOG_WARNING, r,
1095 SOCKET_OPTION_WARNING_FORMAT_STR, "SO_PASSSEC");
54ecda32
LP		 1096 }
1097
a3d19f5d 1098 if (s->pass_pktinfo) {
5d0fe423 1099 r = socket_set_recvpktinfo(fd, socket_address_family(&p->address), true);
a3d19f5d 1100 if (r < 0)
b81a14b9 1101 log_unit_warning_errno(UNIT(s), r, SOCKET_OPTION_WARNING_FORMAT_STR, "packet info");
a3d19f5d
LP		 1102 }
1103
5c12797f
MY		 1104 if (!s->pass_rights) {
1105 r = setsockopt_int(fd, SOL_SOCKET, SO_PASSRIGHTS, false);
1106 if (r < 0)
1107 log_unit_full_errno(UNIT(s), ERRNO_IS_NEG_NOT_SUPPORTED(r) ? LOG_DEBUG : LOG_WARNING, r,
1108 SOCKET_OPTION_WARNING_FORMAT_STR, "SO_PASSRIGHTS");
1109 }
1110
9b191525
LP		 1111 if (s->timestamping != SOCKET_TIMESTAMPING_OFF) {
1112 r = setsockopt_int(fd, SOL_SOCKET,
1113 s->timestamping == SOCKET_TIMESTAMPING_NS ? SO_TIMESTAMPNS : SO_TIMESTAMP,
1114 true);
1115 if (r < 0)
b81a14b9 1116 log_unit_warning_errno(UNIT(s), r, SOCKET_OPTION_WARNING_FORMAT_STR, "timestamping");
9b191525
LP		 1117 }
1118
9e5b6496
YW		 1119 if (s->priority >= 0) {
1120 r = setsockopt_int(fd, SOL_SOCKET, SO_PRIORITY, s->priority);
1121 if (r < 0)
b81a14b9 1122 log_socket_option_warning_errno(s, r, SO_PRIORITY);
9e5b6496 1123 }
4fd5948e
LP		 1124
1125 if (s->receive_buffer > 0) {
ded71ab3
YW		 1126 r = fd_set_rcvbuf(fd, s->receive_buffer, false);
1127 if (r < 0)
b81a14b9
MY		 1128 log_unit_full_errno(UNIT(s), ERRNO_IS_NEG_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r,
1129 SOCKET_OPTION_WARNING_FORMAT_STR, "SO_RCVBUF/SO_RCVBUFFORCE");
4fd5948e
LP		 1130 }
1131
1132 if (s->send_buffer > 0) {
4934ba21 1133 r = fd_set_sndbuf(fd, s->send_buffer, false);
ded71ab3 1134 if (r < 0)
b81a14b9
MY		 1135 log_unit_full_errno(UNIT(s), ERRNO_IS_NEG_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r,
1136 SOCKET_OPTION_WARNING_FORMAT_STR, "SO_SNDBUF/SO_SNDBUFFORCE");
4fd5948e
LP		 1137 }
1138
9e5b6496
YW		 1139 if (s->mark >= 0) {
1140 r = setsockopt_int(fd, SOL_SOCKET, SO_MARK, s->mark);
1141 if (r < 0)
b81a14b9 1142 log_socket_option_warning_errno(s, r, SO_MARK);
9e5b6496 1143 }
4fd5948e 1144
9e5b6496
YW		 1145 if (s->ip_tos >= 0) {
1146 r = setsockopt_int(fd, IPPROTO_IP, IP_TOS, s->ip_tos);
1147 if (r < 0)
b81a14b9 1148 log_socket_option_warning_errno(s, r, IP_TOS);
9e5b6496 1149 }
4fd5948e 1150
46925ac5 1151 if (s->ip_ttl >= 0) {
5d0fe423
LP		 1152 r = socket_set_ttl(fd, socket_address_family(&p->address), s->ip_ttl);
1153 if (r < 0)
b81a14b9 1154 log_unit_warning_errno(UNIT(s), r, SOCKET_OPTION_WARNING_FORMAT_STR, "IP_TTL/IPV6_UNICAST_HOPS");
46925ac5 1155 }
cebf8b20
TT		 1156
1157 if (s->tcp_congestion)
1158 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
b81a14b9 1159 log_socket_option_warning_errno(s, errno, TCP_CONGESTION);
0eb59ccf 1160
d53e386d 1161 if (s->smack_ip_in) {
5ab58c20 1162 r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in);
d53e386d 1163 if (r < 0)
d83ceacc 1164 log_unit_error_errno(UNIT(s), r, "Failed to apply SMACK label for IP input, ignoring: %m");
d53e386d 1165 }
9a4e038c 1166
d53e386d 1167 if (s->smack_ip_out) {
5ab58c20 1168 r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out);
d53e386d 1169 if (r < 0)
d83ceacc 1170 log_unit_error_errno(UNIT(s), r, "Failed to apply SMACK label for IP output, ignoring: %m");
d53e386d 1171 }
4fd5948e
LP		 1172}
1173
b15bdda8 1174static void socket_apply_fifo_options(Socket *s, int fd) {
d53e386d
LP		 1175 int r;
1176
4fd5948e
LP		 1177 assert(s);
1178 assert(fd >= 0);
1179
1180 if (s->pipe_size > 0)
1181 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
ed460b07 1182 log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m");
0eb59ccf 1183
d53e386d 1184 if (s->smack) {
5ab58c20 1185 r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack);
d53e386d 1186 if (r < 0)
ed460b07 1187 log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m");
d53e386d 1188 }
4fd5948e
LP		 1189}
1190
b15bdda8
LP		 1191static int fifo_address_create(
1192 const char *path,
1193 mode_t directory_mode,
e8da24a6 1194 mode_t socket_mode) {
b15bdda8 1195
254d1313 1196 _cleanup_close_ int fd = -EBADF;
b15bdda8 1197 mode_t old_mask;
e8da24a6
LP		 1198 struct stat st;
1199 int r;
b15bdda8
LP		 1200
1201 assert(path);
b15bdda8 1202
1af87ab7 1203 (void) mkdir_parents_label(path, directory_mode);
b15bdda8 1204
ecabcf8b 1205 r = mac_selinux_create_file_prepare(path, S_IFIFO);
e9a5ef7c 1206 if (r < 0)
e8da24a6 1207 return r;
b15bdda8
LP		 1208
1209 /* Enforce the right access mode for the fifo */
7be9df7d 1210 old_mask = umask(~socket_mode);
b15bdda8
LP		 1211
1212 /* Include the original umask in our mask */
e8da24a6 1213 (void) umask(~socket_mode | old_mask);
b15bdda8
LP		 1214
1215 r = mkfifo(path, socket_mode);
e8da24a6 1216 (void) umask(old_mask);
b15bdda8 1217
94bc2731 1218 if (r < 0 && errno != EEXIST) {
b15bdda8
LP		 1219 r = -errno;
1220 goto fail;
1221 }
1222
e8da24a6 1223 fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW);
3cc2aff1 1224 if (fd < 0) {
b15bdda8
LP		 1225 r = -errno;
1226 goto fail;
1227 }
1228
ecabcf8b 1229 mac_selinux_create_file_clear();
7a58bfa4 1230
b15bdda8
LP		 1231 if (fstat(fd, &st) < 0) {
1232 r = -errno;
1233 goto fail;
1234 }
1235
1236 if (!S_ISFIFO(st.st_mode) ||
de0200fc 1237 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
e4f44e73
DR		 1238 st.st_uid != getuid() ||
1239 st.st_gid != getgid()) {
b15bdda8
LP		 1240 r = -EEXIST;
1241 goto fail;
1242 }
1243
c10d6bdb 1244 return TAKE_FD(fd);
b15bdda8
LP		 1245
1246fail:
ecabcf8b 1247 mac_selinux_create_file_clear();
b15bdda8
LP		 1248 return r;
1249}
1250
55301ec0 1251static int special_address_create(const char *path, bool writable) {
254d1313 1252 _cleanup_close_ int fd = -EBADF;
b0a3f2bc
LP		 1253 struct stat st;
1254
1255 assert(path);
b0a3f2bc 1256
55301ec0 1257 fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW);
e8da24a6
LP		 1258 if (fd < 0)
1259 return -errno;
b0a3f2bc 1260
e8da24a6
LP		 1261 if (fstat(fd, &st) < 0)
1262 return -errno;
b0a3f2bc
LP		 1263
1264 /* Check whether this is a /proc, /sys or /dev file or char device */
e8da24a6
LP		 1265 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode))
1266 return -EEXIST;
b0a3f2bc 1267
c10d6bdb 1268 return TAKE_FD(fd);
b0a3f2bc
LP		 1269}
1270
80706c32 1271static int usbffs_address_create_at(int dfd, const char *name) {
254d1313 1272 _cleanup_close_ int fd = -EBADF;
60252446
PS		 1273 struct stat st;
1274
80706c32
MY		 1275 assert(dfd >= 0);
1276 assert(name);
60252446 1277
80706c32 1278 fd = openat(dfd, name, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW);
60252446
PS		 1279 if (fd < 0)
1280 return -errno;
1281
1282 if (fstat(fd, &st) < 0)
1283 return -errno;
1284
13e785f7 1285 /* Check whether this is a regular file (ffs endpoint) */
60252446
PS		 1286 if (!S_ISREG(st.st_mode))
1287 return -EEXIST;
1288
c10d6bdb 1289 return TAKE_FD(fd);
60252446
PS		 1290}
1291
916abb21
LP		 1292static int mq_address_create(
1293 const char *path,
1294 mode_t mq_mode,
1295 long maxmsg,
e8da24a6 1296 long msgsize) {
916abb21 1297
254d1313 1298 _cleanup_close_ int fd = -EBADF;
916abb21
LP		 1299 struct stat st;
1300 mode_t old_mask;
1301 struct mq_attr _attr, *attr = NULL;
1302
1303 assert(path);
916abb21
LP		 1304
1305 if (maxmsg > 0 && msgsize > 0) {
e8da24a6
LP		 1306 _attr = (struct mq_attr) {
1307 .mq_flags = O_NONBLOCK,
1308 .mq_maxmsg = maxmsg,
1309 .mq_msgsize = msgsize,
1310 };
916abb21
LP		 1311 attr = &_attr;
1312 }
1313
1314 /* Enforce the right access mode for the mq */
7be9df7d 1315 old_mask = umask(~mq_mode);
916abb21
LP		 1316
1317 /* Include the original umask in our mask */
e8da24a6 1318 (void) umask(~mq_mode | old_mask);
916abb21 1319 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
e8da24a6 1320 (void) umask(old_mask);
916abb21 1321
e8da24a6
LP		 1322 if (fd < 0)
1323 return -errno;
916abb21 1324
e8da24a6
LP		 1325 if (fstat(fd, &st) < 0)
1326 return -errno;
916abb21
LP		 1327
1328 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
1329 st.st_uid != getuid() ||
e8da24a6
LP		 1330 st.st_gid != getgid())
1331 return -EEXIST;
916abb21 1332
c10d6bdb 1333 return TAKE_FD(fd);
916abb21
LP		 1334}
1335
811ba7a0
LP		 1336static int socket_symlink(Socket *s) {
1337 const char *p;
95f7fbbf 1338 int r;
811ba7a0
LP		 1339
1340 assert(s);
1341
1342 p = socket_find_symlink_target(s);
1343 if (!p)
1344 return 0;
1345
95f7fbbf 1346 STRV_FOREACH(i, s->symlinks) {
1af87ab7
LP		 1347 (void) mkdir_parents_label(*i, s->directory_mode);
1348
6c9c51e5 1349 r = symlink_idempotent(p, *i, false);
22b20752
LP		 1350 if (r == -EEXIST && s->remove_on_stop) {
1351 /* If there's already something where we want to create the symlink, and the destructive
1352 * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try
1353 * again. */
1354
1355 if (unlink(*i) >= 0)
6c9c51e5 1356 r = symlink_idempotent(p, *i, false);
22b20752 1357 }
95f7fbbf 1358 if (r < 0)
e2341b6b 1359 log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s %s %s, ignoring: %m",
1ae9b0cf 1360 p, glyph(GLYPH_ARROW_RIGHT), *i);
95f7fbbf 1361 }
811ba7a0
LP		 1362
1363 return 0;
1364}
1365
36078102 1366static int usbffs_write_descs(int fd, Service *s) {
6b7e5923
PS		 1367 int r;
1368
e9fa1bf7
MY		 1369 assert(fd >= 0);
1370 assert(s);
1371
6b7e5923
PS		 1372 if (!s->usb_function_descriptors || !s->usb_function_strings)
1373 return -EINVAL;
1374
1c876927 1375 r = copy_file_fd(s->usb_function_descriptors, fd, 0);
6b7e5923 1376 if (r < 0)
e8da24a6 1377 return r;
6b7e5923 1378
1c876927 1379 return copy_file_fd(s->usb_function_strings, fd, 0);
6b7e5923
PS		 1380}
1381
80706c32
MY		 1382static int usbffs_dispatch_eps(SocketPort *p, int dfd) {
1383 _cleanup_free_ DirectoryEntries *des = NULL;
da6053d0 1384 int r;
60252446 1385
80706c32
MY		 1386 assert(p);
1387 assert(dfd >= 0);
60252446 1388
80706c32
MY		 1389 r = readdir_all(dfd, RECURSE_DIR_SORT|RECURSE_DIR_IGNORE_DOT, &des);
1390 if (r < 0)
1391 return r;
60252446 1392
80706c32
MY		 1393 p->auxiliary_fds = new(int, des->n_entries);
1394 if (!p->auxiliary_fds)
1395 return -ENOMEM;
60252446 1396
80706c32
MY		 1397 FOREACH_ARRAY(i, des->entries, des->n_entries) {
1398 const struct dirent *de = *i;
60252446 1399
80706c32
MY		 1400 if (streq(de->d_name, "ep0"))
1401 continue;
60252446 1402
80706c32 1403 r = usbffs_address_create_at(dfd, de->d_name);
60252446
PS		 1404 if (r < 0)
1405 goto fail;
1406
80706c32 1407 p->auxiliary_fds[p->n_auxiliary_fds++] = r;
60252446
PS		 1408 }
1409
80706c32 1410 assert(p->n_auxiliary_fds < des->n_entries);
60252446 1411
80706c32 1412 return 0;
60252446 1413
80706c32
MY		 1414fail:
1415 socket_port_close_auxiliary_fds(p);
60252446
PS		 1416 return r;
1417}
1418
934ef6a5 1419int socket_load_service_unit(Socket *s, int cfd, Unit **ret) {
f61e4e53
MY		 1420 int r;
1421
934ef6a5
ZJS		 1422 /* Figure out what the unit that will be used to handle the connections on the socket looks like.
1423 *
1424 * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake
1425 * instance name.
1426 */
1427
e9fa1bf7
MY		 1428 assert(s);
1429 assert(ret);
1430
934ef6a5
ZJS		 1431 if (UNIT_ISSET(s->service)) {
1432 *ret = UNIT_DEREF(s->service);
1433 return 0;
1434 }
1435
1436 if (!s->accept)
1437 return -ENODATA;
1438
1439 /* Build the instance name and load the unit */
1440 _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL;
934ef6a5
ZJS		 1441
1442 r = unit_name_to_prefix(UNIT(s)->id, &prefix);
1443 if (r < 0)
1444 return r;
1445
1446 if (cfd >= 0) {
1447 r = instance_from_socket(cfd, s->n_accepted, &instance);
5d873679
MY		 1448 if (ERRNO_IS_NEG_DISCONNECT(r))
1449 /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return
1450 * different errors. This connection is over, but the socket unit lives on. */
1451 return log_unit_debug_errno(UNIT(s), r,
1452 "Got %s on incoming socket, assuming aborted connection attempt, ignoring.",
1453 errno_to_name(r));
1454 if (r < 0)
934ef6a5
ZJS		 1455 return r;
1456 }
1457
1458 /* For accepting sockets, we don't know how the instance will be called until we get a connection and
1459 * can figure out what the peer name is. So let's use "internal" as the instance to make it clear
1460 * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */
1461 r = unit_name_build(prefix, instance ?: "internal", ".service", &name);
1462 if (r < 0)
1463 return r;
1464
1465 return manager_load_unit(UNIT(s)->manager, name, NULL, NULL, ret);
1466}
1467
d24e561d 1468static int socket_determine_selinux_label(Socket *s, char **ret) {
8017ed7e 1469 Unit *service;
d24e561d
LP		 1470 int r;
1471
1472 assert(s);
1473 assert(ret);
1474
8017ed7e
LP		 1475 r = socket_load_service_unit(s, /* cfd= */ -EBADF, &service);
1476 if (r == -ENODATA) {
1477 *ret = NULL;
1478 return 0;
1479 }
29dbc62d
TT		 1480 if (r < 0)
1481 return r;
d24e561d 1482
8017ed7e
LP		 1483 r = service_determine_exec_selinux_label(SERVICE(service), ret);
1484 if (r == -ENODATA) {
1485 *ret = NULL;
29dbc62d
TT		 1486 return 0;
1487 }
d24e561d 1488 return r;
d24e561d
LP		 1489}
1490
a79279c7
LP		 1491static int socket_address_listen_do(
1492 Socket *s,
1493 const SocketAddress *address,
1494 const char *label) {
1495
1496 assert(s);
1497 assert(address);
1498
1499 return socket_address_listen(
1500 address,
1501 SOCK_CLOEXEC|SOCK_NONBLOCK,
1502 s->backlog,
1503 s->bind_ipv6_only,
1504 s->bind_to_device,
1505 s->reuse_port,
1506 s->free_bind,
1507 s->transparent,
1508 s->directory_mode,
1509 s->socket_mode,
1510 label);
1511}
1512
65486032
YW		 1513#define log_address_error_errno(u, address, error, fmt) \
1514 ({ \
1515 _cleanup_free_ char *_t = NULL; \
1516 \
1517 (void) socket_address_print(address, &_t); \
1518 log_unit_error_errno(u, error, fmt, strna(_t)); \
1519 })
ae05e1b6 1520
ec3c5cfa 1521static bool fork_needed(const SocketAddress *address, Socket *s) {
7619cb32 1522 assert(address);
dc7d69b3 1523 assert(s);
7619cb32
LP		 1524
1525 /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */
1526
dc7d69b3
TM		 1527 /* If there are any NFTSet= directives with cgroup source, we need the cgroup */
1528 Unit *u = UNIT(s);
1529 CGroupContext *c = unit_get_cgroup_context(u);
1530 if (c)
1531 FOREACH_ARRAY(nft_set, c->nft_set_context.sets, c->nft_set_context.n_sets)
1532 if (nft_set->source == NFT_SET_SOURCE_CGROUP)
1533 return true;
1534
ec3c5cfa
YW		 1535 if (IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6) &&
1536 bpf_program_supported() > 0) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */
1537 return true;
7619cb32 1538
dc7d69b3 1539 return exec_needs_network_namespace(&s->exec_context);
7619cb32
LP		 1540}
1541
a79279c7
LP		 1542static int socket_address_listen_in_cgroup(
1543 Socket *s,
1544 const SocketAddress *address,
1545 const char *label) {
1546
4775b55d 1547 _cleanup_(pidref_done) PidRef pid = PIDREF_NULL;
71136404 1548 _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
a79279c7 1549 int fd, r;
a79279c7
LP		 1550
1551 assert(s);
1552 assert(address);
1553
7619cb32
LP		 1554 /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the
1555 * socket's cgroup and network namespace in which the socket is actually created. This way we ensure
1556 * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and
1557 * such. */
a79279c7 1558
ec3c5cfa 1559 if (!fork_needed(address, s)) {
7619cb32
LP		 1560 /* Shortcut things... */
1561 fd = socket_address_listen_do(s, address, label);
1562 if (fd < 0)
1563 return log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m");
1564
1565 return fd;
1566 }
1567
1568 r = unit_setup_exec_runtime(UNIT(s));
1569 if (r < 0)
1570 return log_unit_error_errno(UNIT(s), r, "Failed acquire runtime: %m");
1571
1572 if (s->exec_context.network_namespace_path &&
1573 s->exec_runtime &&
28135da3
DDM		 1574 s->exec_runtime->shared &&
1575 s->exec_runtime->shared->netns_storage_socket[0] >= 0) {
1576 r = open_shareable_ns_path(s->exec_runtime->shared->netns_storage_socket, s->exec_context.network_namespace_path, CLONE_NEWNET);
7619cb32
LP		 1577 if (r < 0)
1578 return log_unit_error_errno(UNIT(s), r, "Failed to open network namespace path %s: %m", s->exec_context.network_namespace_path);
1579 }
a79279c7 1580
a70581ff
XR		 1581 if (s->exec_context.ipc_namespace_path &&
1582 s->exec_runtime &&
28135da3
DDM		 1583 s->exec_runtime->shared &&
1584 s->exec_runtime->shared->ipcns_storage_socket[0] >= 0) {
1585 r = open_shareable_ns_path(s->exec_runtime->shared->ipcns_storage_socket, s->exec_context.ipc_namespace_path, CLONE_NEWIPC);
a70581ff
XR		 1586 if (r < 0)
1587 return log_unit_error_errno(UNIT(s), r, "Failed to open IPC namespace path %s: %m", s->exec_context.ipc_namespace_path);
1588 }
1589
a79279c7
LP		 1590 if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0)
1591 return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m");
1592
5162829e 1593 r = unit_fork_helper_process(UNIT(s), "(sd-listen)", /* into_cgroup= */ true, &pid);
a79279c7
LP		 1594 if (r < 0)
1595 return log_unit_error_errno(UNIT(s), r, "Failed to fork off listener stub process: %m");
1596 if (r == 0) {
1597 /* Child */
1598
1599 pair[0] = safe_close(pair[0]);
1600
fbbb9697 1601 if (exec_needs_network_namespace(&s->exec_context) &&
7619cb32 1602 s->exec_runtime &&
28135da3
DDM		 1603 s->exec_runtime->shared &&
1604 s->exec_runtime->shared->netns_storage_socket[0] >= 0) {
7619cb32 1605
41808259 1606 if (namespace_type_supported(NAMESPACE_NET)) {
28135da3 1607 r = setup_shareable_ns(s->exec_runtime->shared->netns_storage_socket, CLONE_NEWNET);
7619cb32
LP		 1608 if (r < 0) {
1609 log_unit_error_errno(UNIT(s), r, "Failed to join network namespace: %m");
1610 _exit(EXIT_NETWORK);
1611 }
1612 } else if (s->exec_context.network_namespace_path) {
1613 log_unit_error(UNIT(s), "Network namespace path configured but network namespaces not supported.");
1614 _exit(EXIT_NETWORK);
1615 } else
1616 log_unit_warning(UNIT(s), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring.");
1617 }
1618
a79279c7
LP		 1619 fd = socket_address_listen_do(s, address, label);
1620 if (fd < 0) {
ae05e1b6 1621 log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m");
a79279c7
LP		 1622 _exit(EXIT_FAILURE);
1623 }
1624
1625 r = send_one_fd(pair[1], fd, 0);
1626 if (r < 0) {
ae05e1b6 1627 log_address_error_errno(UNIT(s), address, r, "Failed to send listening socket (%s) to parent: %m");
a79279c7
LP		 1628 _exit(EXIT_FAILURE);
1629 }
1630
1631 _exit(EXIT_SUCCESS);
1632 }
1633
1634 pair[1] = safe_close(pair[1]);
1635 fd = receive_one_fd(pair[0], 0);
1636
1637 /* We synchronously wait for the helper, as it shouldn't be slow */
4775b55d 1638 r = wait_for_terminate_and_check("(sd-listen)", pid.pid, WAIT_LOG_ABNORMAL);
a79279c7
LP		 1639 if (r < 0) {
1640 safe_close(fd);
1641 return r;
1642 }
1643
1644 if (fd < 0)
ae05e1b6 1645 return log_address_error_errno(UNIT(s), address, fd, "Failed to receive listening socket (%s): %m");
a79279c7
LP		 1646
1647 return fd;
a79279c7
LP		 1648}
1649
75db809a
ZJS		 1650static int socket_open_fds(Socket *orig_s) {
1651 _cleanup_(socket_close_fdsp) Socket *s = orig_s;
6623c64a 1652 _cleanup_freecon_ char *label = NULL;
710a6b50 1653 bool know_label = false;
83c60c9f
LP		 1654 int r;
1655
1656 assert(s);
1657
034c6ed7 1658 LIST_FOREACH(port, p, s->ports) {
83c60c9f 1659
034c6ed7
LP		 1660 if (p->fd >= 0)
1661 continue;
83c60c9f 1662
00411a13
LP		 1663 switch (p->type) {
1664
1665 case SOCKET_SOCKET:
049f8642 1666
7f416dae 1667 if (!know_label) {
934ef6a5
ZJS		 1668 /* Figure out the label, if we don't it know yet. We do it once for the first
1669 * socket where we need this and remember it for the rest. */
7f416dae 1670
d24e561d
LP		 1671 r = socket_determine_selinux_label(s, &label);
1672 if (r < 0)
ae05e1b6 1673 return log_unit_error_errno(UNIT(s), r, "Failed to determine SELinux label: %m");
049f8642
LP		 1674
1675 know_label = true;
1676 }
1677
74bb646e 1678 /* Apply the socket protocol */
d24e561d 1679 switch (p->address.type) {
d2a50e3b 1680
74bb646e 1681 case SOCK_STREAM:
3f690705
MBN		 1682 if (IN_SET(s->socket_protocol, IPPROTO_SCTP, IPPROTO_MPTCP))
1683 p->address.protocol = s->socket_protocol;
1684 break;
1685
74bb646e 1686 case SOCK_SEQPACKET:
d24e561d
LP		 1687 if (s->socket_protocol == IPPROTO_SCTP)
1688 p->address.protocol = s->socket_protocol;
74bb646e 1689 break;
d2a50e3b 1690
74bb646e 1691 case SOCK_DGRAM:
d24e561d
LP		 1692 if (s->socket_protocol == IPPROTO_UDPLITE)
1693 p->address.protocol = s->socket_protocol;
74bb646e
SS		 1694 break;
1695 }
1696
d501e52b
YW		 1697 p->fd = socket_address_listen_in_cgroup(s, &p->address, label);
1698 if (p->fd < 0)
1699 return p->fd;
83c60c9f 1700
5d0fe423 1701 socket_apply_socket_options(s, p, p->fd);
811ba7a0 1702 socket_symlink(s);
00411a13 1703 break;
4fd5948e 1704
00411a13 1705 case SOCKET_SPECIAL:
b0a3f2bc 1706
d501e52b
YW		 1707 p->fd = special_address_create(p->path, s->writable);
1708 if (p->fd < 0)
2fbdfe0b 1709 return log_unit_error_errno(UNIT(s), p->fd, "Failed to open special file '%s': %m", p->path);
00411a13 1710 break;
b0a3f2bc 1711
00411a13 1712 case SOCKET_FIFO:
83c60c9f 1713
d501e52b 1714 p->fd = fifo_address_create(
175a3d25
LP		 1715 p->path,
1716 s->directory_mode,
e8da24a6 1717 s->socket_mode);
d501e52b 1718 if (p->fd < 0)
2fbdfe0b 1719 return log_unit_error_errno(UNIT(s), p->fd, "Failed to open FIFO '%s': %m", p->path);
83c60c9f 1720
b15bdda8 1721 socket_apply_fifo_options(s, p->fd);
811ba7a0 1722 socket_symlink(s);
00411a13 1723 break;
811ba7a0 1724
00411a13 1725 case SOCKET_MQUEUE:
83c60c9f 1726
d501e52b 1727 p->fd = mq_address_create(
175a3d25
LP		 1728 p->path,
1729 s->socket_mode,
1730 s->mq_maxmsg,
e8da24a6 1731 s->mq_msgsize);
d501e52b 1732 if (p->fd < 0)
2fbdfe0b 1733 return log_unit_error_errno(UNIT(s), p->fd, "Failed to open message queue '%s': %m", p->path);
00411a13 1734 break;
e8da24a6 1735
d2a50e3b 1736 case SOCKET_USB_FUNCTION: {
80706c32 1737 _cleanup_close_ int dfd = -EBADF;
60252446 1738
80706c32
MY		 1739 dfd = open(p->path, O_DIRECTORY|O_CLOEXEC);
1740 if (dfd < 0)
1741 return log_unit_error_errno(UNIT(s), errno,
1742 "Failed to open USB FunctionFS dir '%s': %m", p->path);
27a6ea91 1743
80706c32 1744 p->fd = usbffs_address_create_at(dfd, "ep0");
d501e52b 1745 if (p->fd < 0)
80706c32 1746 return log_unit_error_errno(UNIT(s), p->fd, "Failed to open USB FunctionFS ep0: %m");
60252446 1747
36078102 1748 r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service)));
6b7e5923 1749 if (r < 0)
80706c32 1750 return log_unit_error_errno(UNIT(s), r, "Failed to write to USB FunctionFS ep0: %m");
6b7e5923 1751
80706c32 1752 r = usbffs_dispatch_eps(p, dfd);
60252446 1753 if (r < 0)
80706c32 1754 return log_unit_error_errno(UNIT(s), r, "Failed to dispatch USB FunctionFS eps: %m");
00411a13
LP		 1755
1756 break;
27a6ea91 1757 }
2fbdfe0b 1758
00411a13 1759 default:
04499a70 1760 assert_not_reached();
00411a13 1761 }
034c6ed7
LP		 1762 }
1763
2fbdfe0b 1764 TAKE_PTR(s);
034c6ed7 1765 return 0;
034c6ed7
LP		 1766}
1767
1768static void socket_unwatch_fds(Socket *s) {
718db961 1769 int r;
9152c765 1770
034c6ed7
LP		 1771 assert(s);
1772
1773 LIST_FOREACH(port, p, s->ports) {
1774 if (p->fd < 0)
1775 continue;
1776
a4152e3f
LP		 1777 r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF);
1778 if (r < 0)
f2341e0a 1779 log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m");
83c60c9f 1780 }
034c6ed7
LP		 1781}
1782
1783static int socket_watch_fds(Socket *s) {
034c6ed7
LP		 1784 int r;
1785
1786 assert(s);
83c60c9f 1787
034c6ed7
LP		 1788 LIST_FOREACH(port, p, s->ports) {
1789 if (p->fd < 0)
1790 continue;
1791
cbf60d0a 1792 if (p->event_source) {
718db961 1793 r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON);
cbf60d0a
LP		 1794 if (r < 0)
1795 goto fail;
1796 } else {
151b9b96 1797 r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p);
cbf60d0a
LP		 1798 if (r < 0)
1799 goto fail;
4f2d528d 1800
cbf60d0a 1801 (void) sd_event_source_set_description(p->event_source, "socket-port-io");
718db961 1802 }
2bec84e7 1803
14702b9c 1804 r = sd_event_source_set_ratelimit(p->event_source, s->poll_limit.interval, s->poll_limit.burst);
2bec84e7
LP		 1805 if (r < 0)
1806 log_unit_debug_errno(UNIT(s), r, "Failed to set poll limit on I/O event source, ignoring: %m");
034c6ed7 1807 }
83c60c9f 1808
542563ba 1809 return 0;
83c60c9f 1810
034c6ed7 1811fail:
cbf60d0a 1812 log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m");
034c6ed7
LP		 1813 socket_unwatch_fds(s);
1814 return r;
1815}
1816
01a8b467
LP		 1817enum {
1818 SOCKET_OPEN_NONE,
1819 SOCKET_OPEN_SOME,
1820 SOCKET_OPEN_ALL,
1821};
1822
1823static int socket_check_open(Socket *s) {
1824 bool have_open = false, have_closed = false;
01a8b467
LP		 1825
1826 assert(s);
1827
1828 LIST_FOREACH(port, p, s->ports) {
1829 if (p->fd < 0)
1830 have_closed = true;
1831 else
1832 have_open = true;
1833
1834 if (have_open && have_closed)
1835 return SOCKET_OPEN_SOME;
1836 }
1837
1838 if (have_open)
1839 return SOCKET_OPEN_ALL;
1840
1841 return SOCKET_OPEN_NONE;
1842}
1843
034c6ed7
LP		 1844static void socket_set_state(Socket *s, SocketState state) {
1845 SocketState old_state;
e9fa1bf7 1846
034c6ed7
LP		 1847 assert(s);
1848
6fcbec6f
LP		 1849 if (s->state != state)
1850 bus_unit_send_pending_change_signal(UNIT(s), false);
1851
034c6ed7
LP		 1852 old_state = s->state;
1853 s->state = state;
1854
6b09c99c 1855 if (!SOCKET_STATE_WITH_PROCESS(state)) {
5dcadb4c 1856 s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source);
5e94833f 1857 socket_unwatch_control_pid(s);
034c6ed7 1858 s->control_command = NULL;
a16e1123 1859 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 1860 }
034c6ed7 1861
a16e1123
LP		 1862 if (state != SOCKET_LISTENING)
1863 socket_unwatch_fds(s);
1864
bd1fe7c7 1865 if (!IN_SET(state,
58a86a15 1866 SOCKET_START_OPEN,
3900e5fd 1867 SOCKET_START_CHOWN,
bd1fe7c7
LP		 1868 SOCKET_START_POST,
1869 SOCKET_LISTENING,
1870 SOCKET_RUNNING,
1871 SOCKET_STOP_PRE,
1872 SOCKET_STOP_PRE_SIGTERM,
d1e3536d 1873 SOCKET_STOP_PRE_SIGKILL))
034c6ed7
LP		 1874 socket_close_fds(s);
1875
e537352b 1876 if (state != old_state)
f2341e0a 1877 log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state));
acbb0225 1878
96b09de5 1879 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], /* reload_success = */ true);
034c6ed7
LP		 1880}
1881
be847e82 1882static int socket_coldplug(Unit *u) {
e9fa1bf7 1883 Socket *s = ASSERT_PTR(SOCKET(u));
a16e1123
LP		 1884 int r;
1885
a16e1123
LP		 1886 assert(s->state == SOCKET_DEAD);
1887
e821075a
LP		 1888 if (s->deserialized_state == s->state)
1889 return 0;
a16e1123 1890
43a19142 1891 if (pidref_is_set(&s->control_pid) &&
4d9f092b 1892 pidref_is_unwaited(&s->control_pid) > 0 &&
6b09c99c 1893 SOCKET_STATE_WITH_PROCESS(s->deserialized_state)) {
a16e1123 1894
495e75ed 1895 r = unit_watch_pidref(UNIT(s), &s->control_pid, /* exclusive= */ false);
e821075a
LP		 1896 if (r < 0)
1897 return r;
a16e1123 1898
e9276800 1899 r = socket_arm_timer(s, /* relative= */ false, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec));
e821075a
LP		 1900 if (r < 0)
1901 return r;
1902 }
a16e1123 1903
3900e5fd 1904 if (IN_SET(s->deserialized_state,
58a86a15 1905 SOCKET_START_OPEN,
3900e5fd
LP		 1906 SOCKET_START_CHOWN,
1907 SOCKET_START_POST,
1908 SOCKET_LISTENING,
01a8b467
LP		 1909 SOCKET_RUNNING)) {
1910
1911 /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors
5238e957 1912 * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for
01a8b467 1913 * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open,
58a86a15
MY		 1914 * and if there's a mismatch, warn loudly.
1915 *
1916 * Note that SOCKET_START_OPEN requires no special treatment, as it's only intermediate
1917 * between SOCKET_START_PRE and SOCKET_START_CHOWN and shall otherwise not be observed.
1918 * It's listed only for consistency. */
01a8b467
LP		 1919
1920 r = socket_check_open(s);
1921 if (r == SOCKET_OPEN_NONE)
1922 log_unit_warning(UNIT(s),
1923 "Socket unit configuration has changed while unit has been running, "
1924 "no open socket file descriptor left. "
1925 "The socket unit is not functional until restarted.");
1926 else if (r == SOCKET_OPEN_SOME)
1927 log_unit_warning(UNIT(s),
1928 "Socket unit configuration has changed while unit has been running, "
1929 "and some socket file descriptors have not been opened yet. "
1930 "The socket unit is not fully functional until restarted.");
e821075a 1931 }
a16e1123 1932
e821075a
LP		 1933 if (s->deserialized_state == SOCKET_LISTENING) {
1934 r = socket_watch_fds(s);
1935 if (r < 0)
1936 return r;
a16e1123
LP		 1937 }
1938
15220772 1939 if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED, SOCKET_CLEANING))
e8a565cb 1940 (void) unit_setup_exec_runtime(u);
29206d46 1941
e821075a 1942 socket_set_state(s, s->deserialized_state);
a16e1123
LP		 1943 return 0;
1944}
1945
43a19142 1946static int socket_spawn(Socket *s, ExecCommand *c, PidRef *ret_pid) {
fba173ff 1947 _cleanup_(exec_params_shallow_clear) ExecParameters exec_params = EXEC_PARAMETERS_INIT(
b646fc32 1948 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN);
43a19142 1949 _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL;
3c7416b6 1950 int r;
034c6ed7
LP		 1951
1952 assert(s);
1953 assert(c);
43a19142 1954 assert(ret_pid);
034c6ed7 1955
3c7416b6 1956 r = unit_prepare_exec(UNIT(s));
29206d46
LP		 1957 if (r < 0)
1958 return r;
1959
e9276800 1960 r = socket_arm_timer(s, /* relative= */ true, s->timeout_usec);
36697dc0 1961 if (r < 0)
36c16a7c 1962 return r;
034c6ed7 1963
1ad6e8b3
LP		 1964 r = unit_set_exec_params(UNIT(s), &exec_params);
1965 if (r < 0)
1966 return r;
3536f49e 1967
97df75d7
JS		 1968 /* Note that ExecStartPre= command doesn't inherit any FDs. It runs before we open listen FDs. */
1969 if (s->pass_fds_to_exec) {
1970 _cleanup_strv_free_ char **fd_names = NULL;
1971 _cleanup_free_ int *fds = NULL;
1972 int n_fds;
1973
1974 n_fds = socket_collect_fds(s, &fds);
1975 if (n_fds < 0)
1976 return n_fds;
1977
1978 r = strv_extend_n(&fd_names, socket_fdname(s), n_fds);
1979 if (r < 0)
1980 return r;
1981
1982 exec_params.flags |= EXEC_PASS_FDS;
1983 exec_params.fds = TAKE_PTR(fds);
1984 exec_params.fd_names = TAKE_PTR(fd_names);
1985 exec_params.n_socket_fds = n_fds;
1986 }
1987
f2341e0a
LP		 1988 r = exec_spawn(UNIT(s),
1989 c,
9e2f7c11 1990 &s->exec_context,
9fa95f85 1991 &exec_params,
613b411c 1992 s->exec_runtime,
6bb00842 1993 &s->cgroup_context,
556d2bc4 1994 &pidref);
9e2f7c11 1995 if (r < 0)
36c16a7c 1996 return r;
034c6ed7 1997
495e75ed 1998 r = unit_watch_pidref(UNIT(s), &pidref, /* exclusive= */ true);
43a19142
LP		 1999 if (r < 0)
2000 return r;
3536f49e 2001
43a19142 2002 *ret_pid = TAKE_PIDREF(pidref);
3900e5fd 2003 return 0;
3900e5fd
LP		 2004}
2005
43a19142 2006static int socket_chown(Socket *s, PidRef *ret_pid) {
4775b55d 2007 _cleanup_(pidref_done) PidRef pid = PIDREF_NULL;
3900e5fd
LP		 2008 int r;
2009
43a19142
LP		 2010 assert(s);
2011
e9276800 2012 r = socket_arm_timer(s, /* relative= */ true, s->timeout_usec);
3900e5fd 2013 if (r < 0)
894a30ef 2014 return r;
3900e5fd
LP		 2015
2016 /* We have to resolve the user names out-of-process, hence
2017 * let's fork here. It's messy, but well, what can we do? */
2018
5162829e 2019 r = unit_fork_helper_process(UNIT(s), "(sd-chown)", /* into_cgroup= */ true, &pid);
a79279c7
LP		 2020 if (r < 0)
2021 return r;
2022 if (r == 0) {
fed1e721
LP		 2023 uid_t uid = UID_INVALID;
2024 gid_t gid = GID_INVALID;
3900e5fd 2025
a79279c7 2026 /* Child */
3900e5fd
LP		 2027
2028 if (!isempty(s->user)) {
2029 const char *user = s->user;
2030
fafff8f1 2031 r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0);
3900e5fd 2032 if (r < 0) {
a79279c7
LP		 2033 log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user);
2034 _exit(EXIT_USER);
3900e5fd
LP		 2035 }
2036 }
2037
2038 if (!isempty(s->group)) {
2039 const char *group = s->group;
2040
fafff8f1 2041 r = get_group_creds(&group, &gid, 0);
3900e5fd 2042 if (r < 0) {
a79279c7
LP		 2043 log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group);
2044 _exit(EXIT_GROUP);
3900e5fd
LP		 2045 }
2046 }
2047
2048 LIST_FOREACH(port, p, s->ports) {
e5a1c18d 2049 const char *path = NULL;
3900e5fd
LP		 2050
2051 if (p->type == SOCKET_SOCKET)
2052 path = socket_address_get_path(&p->address);
2053 else if (p->type == SOCKET_FIFO)
2054 path = p->path;
3eec82f6
DM		 2055 else if (p->type == SOCKET_MQUEUE) {
2056 /* Use fchown on the fd since /dev/mqueue might not be mounted. */
2057 if (fchown(p->fd, uid, gid) < 0) {
2058 log_unit_error_errno(UNIT(s), errno, "Failed to fchown(): %m");
2059 _exit(EXIT_CHOWN);
2060 }
2061 continue;
2062 }
3900e5fd
LP		 2063
2064 if (!path)
2065 continue;
2066
2067 if (chown(path, uid, gid) < 0) {
a79279c7
LP		 2068 log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m");
2069 _exit(EXIT_CHOWN);
3900e5fd
LP		 2070 }
2071 }
2072
a79279c7 2073 _exit(EXIT_SUCCESS);
3900e5fd
LP		 2074 }
2075
495e75ed 2076 r = unit_watch_pidref(UNIT(s), &pid, /* exclusive= */ true);
718db961 2077 if (r < 0)
894a30ef 2078 return r;
83c60c9f 2079
4775b55d 2080 *ret_pid = TAKE_PIDREF(pid);
034c6ed7 2081 return 0;
542563ba
LP		 2082}
2083
cfc4eb4c 2084static void socket_enter_dead(Socket *s, SocketResult f) {
034c6ed7
LP		 2085 assert(s);
2086
a0fef983 2087 if (s->result == SOCKET_SUCCESS)
cfc4eb4c 2088 s->result = f;
034c6ed7 2089
523ee2d4
LP		 2090 if (s->result == SOCKET_SUCCESS)
2091 unit_log_success(UNIT(s));
2092 else
7c047d74 2093 unit_log_failure(UNIT(s), socket_result_to_string(s->result));
ed77d407 2094
95e631da 2095 unit_warn_leftover_processes(UNIT(s), /* start = */ false);
4c425434 2096
29206d46
LP		 2097 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
2098
28135da3 2099 s->exec_runtime = exec_runtime_destroy(s->exec_runtime);
613b411c 2100
703b1b7f 2101 unit_destroy_runtime_data(UNIT(s), &s->exec_context, /* destroy_runtime_dir = */ true);
e66cf1a3 2102
00d9ef85 2103 unit_unref_uid_gid(UNIT(s), true);
034c6ed7
LP		 2104}
2105
cfc4eb4c 2106static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
80876c20 2107
cfc4eb4c 2108static void socket_enter_stop_post(Socket *s, SocketResult f) {
034c6ed7 2109 int r;
e9fa1bf7 2110
034c6ed7
LP		 2111 assert(s);
2112
a0fef983 2113 if (s->result == SOCKET_SUCCESS)
cfc4eb4c 2114 s->result = f;
034c6ed7 2115
5e94833f 2116 socket_unwatch_control_pid(s);
a16e1123 2117 s->control_command_id = SOCKET_EXEC_STOP_POST;
3900e5fd 2118 s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST];
a16e1123 2119
3900e5fd 2120 if (s->control_command) {
43a19142
LP		 2121 pidref_done(&s->control_pid);
2122
3900e5fd 2123 r = socket_spawn(s, s->control_command, &s->control_pid);
a237a93e
LP		 2124 if (r < 0) {
2125 log_unit_warning_errno(UNIT(s), r, "Failed to spawn 'stop-post' task: %m");
2126 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
2127 return;
2128 }
034c6ed7 2129
80876c20
LP		 2130 socket_set_state(s, SOCKET_STOP_POST);
2131 } else
cfc4eb4c 2132 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
034c6ed7
LP		 2133}
2134
a232ebcc 2135static int state_to_kill_operation(Socket *s, SocketState state) {
24045720
MY		 2136 assert(s);
2137
2138 if (state == SOCKET_STOP_PRE_SIGTERM)
2139 return unit_has_job_type(UNIT(s), JOB_RESTART) ? KILL_RESTART : KILL_TERMINATE;
a232ebcc
ZJS		 2140
2141 if (state == SOCKET_FINAL_SIGTERM)
2142 return KILL_TERMINATE;
2143
2144 return KILL_KILL;
2145}
2146
cfc4eb4c 2147static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
034c6ed7
LP		 2148 int r;
2149
2150 assert(s);
2151
a0fef983 2152 if (s->result == SOCKET_SUCCESS)
cfc4eb4c 2153 s->result = f;
034c6ed7 2154
b826e317 2155 r = unit_kill_context(UNIT(s), state_to_kill_operation(s, state));
a237a93e
LP		 2156 if (r < 0) {
2157 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
cd2086fe 2158 goto fail;
a237a93e 2159 }
cd2086fe 2160 if (r > 0) {
e9276800 2161 r = socket_arm_timer(s, /* relative= */ true, s->timeout_usec);
a237a93e
LP		 2162 if (r < 0) {
2163 log_unit_warning_errno(UNIT(s), r, "Failed to install timer: %m");
80876c20 2164 goto fail;
a237a93e 2165 }
d6ea93e3 2166
80876c20 2167 socket_set_state(s, state);
ac84d1fb
LP		 2168 } else if (state == SOCKET_STOP_PRE_SIGTERM)
2169 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS);
2170 else if (state == SOCKET_STOP_PRE_SIGKILL)
cfc4eb4c 2171 socket_enter_stop_post(s, SOCKET_SUCCESS);
ac84d1fb
LP		 2172 else if (state == SOCKET_FINAL_SIGTERM)
2173 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS);
80876c20 2174 else
cfc4eb4c 2175 socket_enter_dead(s, SOCKET_SUCCESS);
034c6ed7
LP		 2176
2177 return;
2178
2179fail:
3742095b 2180 if (IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_STOP_PRE_SIGKILL))
cfc4eb4c 2181 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
034c6ed7 2182 else
cfc4eb4c 2183 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 2184}
2185
cfc4eb4c 2186static void socket_enter_stop_pre(Socket *s, SocketResult f) {
034c6ed7 2187 int r;
e9fa1bf7 2188
034c6ed7
LP		 2189 assert(s);
2190
a0fef983 2191 if (s->result == SOCKET_SUCCESS)
cfc4eb4c 2192 s->result = f;
034c6ed7 2193
5e94833f 2194 socket_unwatch_control_pid(s);
a16e1123 2195 s->control_command_id = SOCKET_EXEC_STOP_PRE;
3900e5fd 2196 s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE];
a16e1123 2197
3900e5fd 2198 if (s->control_command) {
43a19142
LP		 2199 pidref_done(&s->control_pid);
2200
3900e5fd 2201 r = socket_spawn(s, s->control_command, &s->control_pid);
a237a93e
LP		 2202 if (r < 0) {
2203 log_unit_warning_errno(UNIT(s), r, "Failed to spawn 'stop-pre' task: %m");
2204 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
2205 return;
2206 }
034c6ed7 2207
80876c20
LP		 2208 socket_set_state(s, SOCKET_STOP_PRE);
2209 } else
cfc4eb4c 2210 socket_enter_stop_post(s, SOCKET_SUCCESS);
034c6ed7
LP		 2211}
2212
2fbdfe0b
MY		 2213static void flush_ports(Socket *s) {
2214 assert(s);
2215
2216 /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy
2217 * anymore */
2218
2219 LIST_FOREACH(port, p, s->ports) {
2220 if (p->fd < 0)
2221 continue;
2222
ffb6adb7
TM		 2223 if (p->type == SOCKET_MQUEUE)
2224 (void) flush_mqueue(p->fd);
2225 else {
2226 (void) flush_accept(p->fd);
2227 (void) flush_fd(p->fd);
2228 }
2fbdfe0b
MY		 2229 }
2230}
2231
e9af15c3
LP		 2232static void socket_enter_listening(Socket *s) {
2233 int r;
e9fa1bf7 2234
e9af15c3
LP		 2235 assert(s);
2236
3e5f04bf
RM		 2237 if (!s->accept && s->flush_pending) {
2238 log_unit_debug(UNIT(s), "Flushing socket before listening.");
2239 flush_ports(s);
2240 }
2241
cfc4eb4c
LP		 2242 r = socket_watch_fds(s);
2243 if (r < 0) {
f2341e0a 2244 log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m");
a237a93e
LP		 2245 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2246 return;
e9af15c3
LP		 2247 }
2248
2249 socket_set_state(s, SOCKET_LISTENING);
e9af15c3
LP		 2250}
2251
034c6ed7
LP		 2252static void socket_enter_start_post(Socket *s) {
2253 int r;
e9fa1bf7 2254
034c6ed7
LP		 2255 assert(s);
2256
3900e5fd
LP		 2257 socket_unwatch_control_pid(s);
2258 s->control_command_id = SOCKET_EXEC_START_POST;
2259 s->control_command = s->exec_command[SOCKET_EXEC_START_POST];
2260
2261 if (s->control_command) {
43a19142
LP		 2262 pidref_done(&s->control_pid);
2263
3900e5fd
LP		 2264 r = socket_spawn(s, s->control_command, &s->control_pid);
2265 if (r < 0) {
a237a93e
LP		 2266 log_unit_warning_errno(UNIT(s), r, "Failed to spawn 'start-post' task: %m");
2267 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2268 return;
3900e5fd
LP		 2269 }
2270
2271 socket_set_state(s, SOCKET_START_POST);
2272 } else
2273 socket_enter_listening(s);
3900e5fd
LP		 2274}
2275
2276static void socket_enter_start_chown(Socket *s) {
2277 int r;
2278
2279 assert(s);
58a86a15 2280 assert(s->state == SOCKET_START_OPEN);
034c6ed7 2281
3900e5fd 2282 if (!isempty(s->user) || !isempty(s->group)) {
5e94833f 2283
3900e5fd
LP		 2284 socket_unwatch_control_pid(s);
2285 s->control_command_id = SOCKET_EXEC_START_CHOWN;
2286 s->control_command = NULL;
a16e1123 2287
3900e5fd 2288 r = socket_chown(s, &s->control_pid);
cfc4eb4c 2289 if (r < 0) {
a237a93e 2290 log_unit_warning_errno(UNIT(s), r, "Failed to spawn 'start-chown' task: %m");
58a86a15
MY		 2291 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2292 return;
034c6ed7
LP		 2293 }
2294
3900e5fd 2295 socket_set_state(s, SOCKET_START_CHOWN);
80876c20 2296 } else
3900e5fd 2297 socket_enter_start_post(s);
58a86a15 2298}
034c6ed7 2299
58a86a15
MY		 2300static void socket_enter_start_open(Socket *s) {
2301 int r;
034c6ed7 2302
58a86a15
MY		 2303 assert(s);
2304 assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED, SOCKET_START_PRE));
2305
2306 /* We force a state transition here even though we're not spawning any process (i.e. the state is purely
2307 * intermediate), so that failure of socket_open_fds() always causes a state change in unit_notify().
2308 * Otherwise, if no Exec*= is defined, we might go from previous SOCKET_FAILED to SOCKET_FAILED,
2309 * meaning the OnFailure= deps are unexpectedly skipped (#35635). */
2310
2311 socket_set_state(s, SOCKET_START_OPEN);
2312
2313 r = socket_open_fds(s);
2314 if (r < 0) {
2315 log_unit_error_errno(UNIT(s), r, "Failed to listen on sockets: %m");
2316 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2317 return;
2318 }
2319
2320 socket_enter_start_chown(s);
034c6ed7
LP		 2321}
2322
2323static void socket_enter_start_pre(Socket *s) {
2324 int r;
e9fa1bf7 2325
034c6ed7
LP		 2326 assert(s);
2327
5e94833f 2328 socket_unwatch_control_pid(s);
a4634b21 2329
95e631da 2330 unit_warn_leftover_processes(UNIT(s), /* start = */ true);
a4634b21 2331
a16e1123 2332 s->control_command_id = SOCKET_EXEC_START_PRE;
3900e5fd 2333 s->control_command = s->exec_command[SOCKET_EXEC_START_PRE];
a16e1123 2334
3900e5fd 2335 if (s->control_command) {
43a19142
LP		 2336 pidref_done(&s->control_pid);
2337
e821075a 2338 r = socket_spawn(s, s->control_command, &s->control_pid);
3900e5fd 2339 if (r < 0) {
a237a93e
LP		 2340 log_unit_warning_errno(UNIT(s), r, "Failed to spawn 'start-pre' task: %m");
2341 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
2342 return;
3900e5fd 2343 }
034c6ed7 2344
80876c20
LP		 2345 socket_set_state(s, SOCKET_START_PRE);
2346 } else
58a86a15 2347 socket_enter_start_open(s);
034c6ed7
LP		 2348}
2349
5cf09553
ZJS		 2350static void socket_enter_running(Socket *s, int cfd_in) {
2351 /* Note that this call takes possession of the connection fd passed. It either has to assign it
2352 * somewhere or close it. */
2353 _cleanup_close_ int cfd = cfd_in;
4afd3348 2354 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
034c6ed7
LP		 2355 int r;
2356
2357 assert(s);
2358
60d9771c 2359 /* We don't take connections anymore if we are supposed to shut down anyway */
31afa0a4 2360 if (unit_stop_pending(UNIT(s))) {
e821075a 2361
f2341e0a 2362 log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled.");
5d909e3e 2363
7c610628 2364 if (cfd >= 0)
a98f7575 2365 goto refuse;
7c610628 2366
5cf09553 2367 flush_ports(s);
ba3e67a7
LP		 2368 return;
2369 }
2370
7994ac1d 2371 if (!ratelimit_below(&s->trigger_limit)) {
8b26cdbd
LP		 2372 log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation.");
2373 socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT);
a98f7575 2374 goto refuse;
8b26cdbd
LP		 2375 }
2376
a237a93e 2377 if (cfd < 0) { /* Accept=no case */
f976f3f6 2378 bool pending = false;
eef85c4a 2379 Unit *other;
f976f3f6 2380
15ed3c3a
LP		 2381 /* If there's already a start pending don't bother to do anything */
2382 UNIT_FOREACH_DEPENDENCY(other, UNIT(s), UNIT_ATOM_TRIGGERS)
e821075a 2383 if (unit_active_or_pending(other)) {
57020a3a
LP		 2384 pending = true;
2385 break;
2386 }
f976f3f6 2387
1a710b43 2388 if (!pending) {
640ace4a 2389 if (!UNIT_ISSET(s->service)) {
f61e4e53
MY		 2390 log_unit_warning(UNIT(s),
2391 "Service to activate vanished, refusing activation.");
640ace4a
LP		 2392 goto fail;
2393 }
2394
d993ad6c 2395 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, &error, /* ret = */ NULL);
b50f6dbe
YW		 2396 if (r == -EDEADLK)
2397 return (void) log_unit_debug_errno(UNIT(s), r, "Failed to queue service startup job, ignoring: %s", bus_error_message(&error, r));
1a710b43 2398 if (r < 0)
a237a93e 2399 goto queue_error;
1a710b43 2400 }
4f2d528d
LP		 2401
2402 socket_set_state(s, SOCKET_RUNNING);
a237a93e 2403 } else { /* Accept=yes case */
9d565427 2404 _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL;
b669c20f 2405 Unit *service;
4f2d528d 2406
6cf6bbc2 2407 if (s->n_connections >= s->max_connections) {
ea8f50f8 2408 log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.",
166cf510 2409 s->n_connections);
a98f7575 2410 goto refuse;
6cf6bbc2
LP		 2411 }
2412
9d565427 2413 if (s->max_connections_per_source > 0) {
166cf510 2414 r = socket_acquire_peer(s, cfd, &p);
d5f8890b
DL		 2415 if (r < 0) {
2416 if (ERRNO_IS_DISCONNECT(r))
2417 return;
2418 /* We didn't have enough resources to acquire peer information, let's fail. */
86e045ec 2419 goto fail;
d5f8890b 2420 }
934ef6a5 2421 if (r > 0 && p->n_ref > s->max_connections_per_source) {
ea8f50f8
ZJS		 2422 _cleanup_free_ char *t = NULL;
2423
48930a5d
LP		 2424 if (p->peer.sa.sa_family == AF_UNIX)
2425 (void) asprintf(&t, "UID " UID_FMT, p->peer_cred.uid);
2426 else
2427 (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, /* translate_ipv6= */ true, /* include_port= */ false, &t);
ea8f50f8 2428
166cf510 2429 log_unit_warning(UNIT(s),
ea8f50f8
ZJS		 2430 "Too many incoming connections (%u) from source %s, dropping connection.",
2431 p->n_ref, strnull(t));
a98f7575 2432 goto refuse;
9d565427
SS		 2433 }
2434 }
2435
b669c20f 2436 r = socket_load_service_unit(s, cfd, &service);
f61e4e53
MY		 2437 if (ERRNO_IS_NEG_DISCONNECT(r))
2438 return;
2439 if (r < 0 || UNIT_IS_LOAD_ERROR(service->load_state)) {
2440 log_unit_warning_errno(UNIT(s), r < 0 ? r : service->load_error,
2441 "Failed to load connection service unit: %m");
2442 goto fail;
2443 }
2444 if (service->load_state == UNIT_MASKED) {
2445 log_unit_warning(UNIT(s), "Connection service unit is masked, refusing.");
4f2d528d 2446 goto fail;
8dfb0ef1 2447 }
b15bdda8 2448
e4f67317 2449 s->n_accepted++;
b15bdda8 2450
3fabebf4 2451 r = service_set_socket_fd(SERVICE(service), cfd, s, p, s->selinux_context_from_net);
daa78907
MY		 2452 if (ERRNO_IS_NEG_DISCONNECT(r))
2453 return;
8dfb0ef1 2454 if (r < 0) {
a237a93e 2455 log_unit_warning_errno(UNIT(s), r, "Failed to set socket on service: %m");
4f2d528d 2456 goto fail;
8dfb0ef1 2457 }
4f2d528d 2458
d6a911e9
MY		 2459 /* We passed ownership of the fd and socket peer to the service now. */
2460 TAKE_FD(cfd);
2461 TAKE_PTR(p);
2462
313cefa1 2463 s->n_connections++;
6cf6bbc2 2464
d993ad6c 2465 r = manager_add_job(UNIT(s)->manager, JOB_START, service, JOB_REPLACE, &error, /* ret = */ NULL);
3e7a1f50 2466 if (r < 0) {
934ef6a5
ZJS		 2467 /* We failed to activate the new service, but it still exists. Let's make sure the
2468 * service closes and forgets the connection fd again, immediately. */
81a1d6d6 2469 service_release_socket_fd(SERVICE(service));
a237a93e 2470 goto queue_error;
3e7a1f50 2471 }
c4e2ceae
LP		 2472
2473 /* Notify clients about changed counters */
2474 unit_add_to_dbus_queue(UNIT(s));
4f2d528d 2475 }
034c6ed7 2476
034c6ed7
LP		 2477 return;
2478
a98f7575
MM		 2479refuse:
2480 s->n_refused++;
a98f7575
MM		 2481 return;
2482
a237a93e 2483queue_error:
f61e4e53
MY		 2484 log_unit_warning_errno(UNIT(s), r, "Failed to queue service startup job%s: %s",
2485 cfd >= 0 && !ERRNO_IS_RESOURCE(r) ? " (Maybe the service is missing or is a template unit?)" : "",
2486 bus_error_message(&error, r));
e821075a 2487
a237a93e 2488fail:
60089004 2489 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 2490}
2491
cfc4eb4c 2492static void socket_run_next(Socket *s) {
034c6ed7
LP		 2493 int r;
2494
2495 assert(s);
2496 assert(s->control_command);
2497 assert(s->control_command->command_next);
2498
5e94833f
LP		 2499 socket_unwatch_control_pid(s);
2500
034c6ed7
LP		 2501 s->control_command = s->control_command->command_next;
2502
43a19142
LP		 2503 pidref_done(&s->control_pid);
2504
e821075a 2505 r = socket_spawn(s, s->control_command, &s->control_pid);
a237a93e
LP		 2506 if (r < 0) {
2507 log_unit_warning_errno(UNIT(s), r, "Failed to spawn next task: %m");
80876c20 2508
a237a93e
LP		 2509 if (s->state == SOCKET_START_POST)
2510 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2511 else if (s->state == SOCKET_STOP_POST)
2512 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
2513 else
2514 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
2515 }
034c6ed7
LP		 2516}
2517
87f0e418 2518static int socket_start(Unit *u) {
e9fa1bf7 2519 Socket *s = ASSERT_PTR(SOCKET(u));
07299350 2520 int r;
83c60c9f 2521
034c6ed7
LP		 2522 /* We cannot fulfill this request right now, try again later
2523 * please! */
3900e5fd
LP		 2524 if (IN_SET(s->state,
2525 SOCKET_STOP_PRE,
2526 SOCKET_STOP_PRE_SIGKILL,
2527 SOCKET_STOP_PRE_SIGTERM,
2528 SOCKET_STOP_POST,
2529 SOCKET_FINAL_SIGTERM,
c968d76a
YW		 2530 SOCKET_FINAL_SIGKILL,
2531 SOCKET_CLEANING))
034c6ed7
LP		 2532 return -EAGAIN;
2533
a4152e3f 2534 /* Already on it! */
3900e5fd
LP		 2535 if (IN_SET(s->state,
2536 SOCKET_START_PRE,
58a86a15 2537 SOCKET_START_OPEN,
3900e5fd
LP		 2538 SOCKET_START_CHOWN,
2539 SOCKET_START_POST))
034c6ed7 2540 return 0;
83c60c9f 2541
034c6ed7 2542 /* Cannot run this without the service being around */
9444b1f2 2543 if (UNIT_ISSET(s->service)) {
4c523d62 2544 Service *service = ASSERT_PTR(SERVICE(UNIT_DEREF(s->service)));
57020a3a 2545
d85ff944 2546 if (UNIT(service)->load_state != UNIT_LOADED)
c068650f
MY		 2547 return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT),
2548 "Socket service %s not loaded, refusing.", UNIT(service)->id);
4f2d528d 2549
4c523d62
MY		 2550 /* If the service is already active we cannot start the socket */
2551 if (SOCKET_SERVICE_IS_ACTIVE(service, /* allow_finalize = */ false))
c068650f
MY		 2552 return log_unit_error_errno(u, SYNTHETIC_ERRNO(EBUSY),
2553 "Socket service %s already active, refusing.", UNIT(service)->id);
4f2d528d 2554 }
e537352b 2555
3742095b 2556 assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED));
83c60c9f 2557
4b58153d
LP		 2558 r = unit_acquire_invocation_id(u);
2559 if (r < 0)
2560 return r;
2561
cfc4eb4c 2562 s->result = SOCKET_SUCCESS;
6a1d4d9f 2563 exec_command_reset_status_list_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
3c7416b6 2564
9cc54544
LP		 2565 if (s->cgroup_runtime)
2566 s->cgroup_runtime->reset_accounting = true;
5ad096b3 2567
034c6ed7 2568 socket_enter_start_pre(s);
82a2b6bb 2569 return 1;
034c6ed7 2570}
83c60c9f 2571
87f0e418 2572static int socket_stop(Unit *u) {
e9fa1bf7 2573 Socket *s = ASSERT_PTR(SOCKET(u));
034c6ed7 2574
e537352b 2575 /* Already on it */
3900e5fd
LP		 2576 if (IN_SET(s->state,
2577 SOCKET_STOP_PRE,
2578 SOCKET_STOP_PRE_SIGTERM,
2579 SOCKET_STOP_PRE_SIGKILL,
2580 SOCKET_STOP_POST,
2581 SOCKET_FINAL_SIGTERM,
2582 SOCKET_FINAL_SIGKILL))
e537352b
LP		 2583 return 0;
2584
3f6c78dc
LP		 2585 /* If there's already something running we go directly into
2586 * kill mode. */
3900e5fd
LP		 2587 if (IN_SET(s->state,
2588 SOCKET_START_PRE,
58a86a15 2589 SOCKET_START_OPEN,
3900e5fd
LP		 2590 SOCKET_START_CHOWN,
2591 SOCKET_START_POST)) {
cfc4eb4c 2592 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
3f6c78dc
LP		 2593 return -EAGAIN;
2594 }
2595
c968d76a
YW		 2596 /* If we are currently cleaning, then abort it, brutally. */
2597 if (s->state == SOCKET_CLEANING) {
2598 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS);
2599 return 0;
2600 }
2601
3742095b 2602 assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING));
83c60c9f 2603
cfc4eb4c 2604 socket_enter_stop_pre(s, SOCKET_SUCCESS);
82a2b6bb 2605 return 1;
542563ba
LP		 2606}
2607
a16e1123 2608static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
e9fa1bf7 2609 Socket *s = ASSERT_PTR(SOCKET(u));
a16e1123
LP		 2610 int r;
2611
a16e1123
LP		 2612 assert(f);
2613 assert(fds);
2614
d68c645b
LP		 2615 (void) serialize_item(f, "state", socket_state_to_string(s->state));
2616 (void) serialize_item(f, "result", socket_result_to_string(s->result));
2617 (void) serialize_item_format(f, "n-accepted", "%u", s->n_accepted);
2618 (void) serialize_item_format(f, "n-refused", "%u", s->n_refused);
2a7451dc 2619 (void) serialize_pidref(f, fds, "control-pid", &s->control_pid);
a16e1123
LP		 2620
2621 if (s->control_command_id >= 0)
d68c645b 2622 (void) serialize_item(f, "control-command", socket_exec_command_to_string(s->control_command_id));
a16e1123
LP		 2623
2624 LIST_FOREACH(port, p, s->ports) {
2625 int copy;
2626
2627 if (p->fd < 0)
2628 continue;
2629
613b411c
LP		 2630 copy = fdset_put_dup(fds, p->fd);
2631 if (copy < 0)
fc2d74ab 2632 return log_unit_warning_errno(u, copy, "Failed to serialize socket fd: %m");
a16e1123
LP		 2633
2634 if (p->type == SOCKET_SOCKET) {
613b411c 2635 _cleanup_free_ char *t = NULL;
a16e1123 2636
ee092817
LP		 2637 r = socket_address_print(&p->address, &t);
2638 if (r < 0)
fc2d74ab 2639 return log_unit_error_errno(u, r, "Failed to format socket address: %m");
a16e1123 2640
7a22745a 2641 if (socket_address_family(&p->address) == AF_NETLINK)
d68c645b 2642 (void) serialize_item_format(f, "netlink", "%i %s", copy, t);
7a22745a 2643 else
d68c645b 2644 (void) serialize_item_format(f, "socket", "%i %i %s", copy, p->address.type, t);
b0a3f2bc 2645 } else if (p->type == SOCKET_SPECIAL)
d68c645b 2646 (void) serialize_item_format(f, "special", "%i %s", copy, p->path);
ee092817 2647 else if (p->type == SOCKET_MQUEUE)
d68c645b 2648 (void) serialize_item_format(f, "mqueue", "%i %s", copy, p->path);
60252446 2649 else if (p->type == SOCKET_USB_FUNCTION)
d68c645b 2650 (void) serialize_item_format(f, "ffs", "%i %s", copy, p->path);
b0a3f2bc 2651 else {
a16e1123 2652 assert(p->type == SOCKET_FIFO);
d68c645b 2653 (void) serialize_item_format(f, "fifo", "%i %s", copy, p->path);
a16e1123
LP		 2654 }
2655 }
2656
51ad723d
ZJS		 2657 (void) serialize_ratelimit(f, "trigger-ratelimit", &s->trigger_limit);
2658
a16e1123
LP		 2659 return 0;
2660}
2661
2662static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
e9fa1bf7 2663 Socket *s = ASSERT_PTR(SOCKET(u));
77be02ad 2664 int r;
a16e1123 2665
a16e1123
LP		 2666 assert(key);
2667 assert(value);
a16e1123
LP		 2668
2669 if (streq(key, "state")) {
2670 SocketState state;
2671
ee092817
LP		 2672 state = socket_state_from_string(value);
2673 if (state < 0)
f2341e0a 2674 log_unit_debug(u, "Failed to parse state value: %s", value);
a16e1123
LP		 2675 else
2676 s->deserialized_state = state;
cfc4eb4c
LP		 2677 } else if (streq(key, "result")) {
2678 SocketResult f;
a16e1123 2679
cfc4eb4c
LP		 2680 f = socket_result_from_string(value);
2681 if (f < 0)
f2341e0a 2682 log_unit_debug(u, "Failed to parse result value: %s", value);
cfc4eb4c
LP		 2683 else if (f != SOCKET_SUCCESS)
2684 s->result = f;
a16e1123
LP		 2685
2686 } else if (streq(key, "n-accepted")) {
2687 unsigned k;
2688
e364ad06 2689 if (safe_atou(value, &k) < 0)
f2341e0a 2690 log_unit_debug(u, "Failed to parse n-accepted value: %s", value);
a16e1123
LP		 2691 else
2692 s->n_accepted += k;
a98f7575
MM		 2693 } else if (streq(key, "n-refused")) {
2694 unsigned k;
2695
2696 if (safe_atou(value, &k) < 0)
2697 log_unit_debug(u, "Failed to parse n-refused value: %s", value);
2698 else
2699 s->n_refused += k;
a16e1123 2700 } else if (streq(key, "control-pid")) {
aaa872a7
DDM		 2701
2702 if (!pidref_is_set(&s->control_pid))
2703 (void) deserialize_pidref(fds, value, &s->control_pid);
2a7451dc 2704
a16e1123
LP		 2705 } else if (streq(key, "control-command")) {
2706 SocketExecCommand id;
2707
66870f90
ZJS		 2708 id = socket_exec_command_from_string(value);
2709 if (id < 0)
f2341e0a 2710 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
a16e1123
LP		 2711 else {
2712 s->control_command_id = id;
2713 s->control_command = s->exec_command[id];
2714 }
2715 } else if (streq(key, "fifo")) {
77be02ad
FS		 2716 _cleanup_free_ char *fdv = NULL;
2717 bool found = false;
2718 int fd;
a16e1123 2719
77be02ad
FS		 2720 r = extract_first_word(&value, &fdv, NULL, 0);
2721 if (r <= 0) {
f2341e0a 2722 log_unit_debug(u, "Failed to parse fifo value: %s", value);
77be02ad 2723 return 0;
3da0caf5 2724 }
b0a3f2bc 2725
77be02ad
FS		 2726 fd = parse_fd(fdv);
2727 if (fd < 0 || !fdset_contains(fds, fd)) {
2728 log_unit_debug(u, "Invalid fifo value: %s", fdv);
2729 return 0;
2730 }
2731
2732 LIST_FOREACH(port, p, s->ports)
2733 if (p->fd < 0 &&
2734 p->type == SOCKET_FIFO &&
563e6846 2735 path_equal_or_inode_same(p->path, value, 0)) {
77be02ad
FS		 2736 p->fd = fdset_remove(fds, fd);
2737 found = true;
2738 break;
2739 }
2740 if (!found)
2741 log_unit_debug(u, "No matching fifo socket found: %s", value);
2742
b0a3f2bc 2743 } else if (streq(key, "special")) {
77be02ad
FS		 2744 _cleanup_free_ char *fdv = NULL;
2745 bool found = false;
2746 int fd;
b0a3f2bc 2747
77be02ad
FS		 2748 r = extract_first_word(&value, &fdv, NULL, 0);
2749 if (r <= 0) {
f2341e0a 2750 log_unit_debug(u, "Failed to parse special value: %s", value);
77be02ad
FS		 2751 return 0;
2752 }
2753
2754 fd = parse_fd(fdv);
2755 if (fd < 0 || !fdset_contains(fds, fd)) {
2756 log_unit_debug(u, "Invalid special value: %s", fdv);
2757 return 0;
3da0caf5 2758 }
a16e1123 2759
77be02ad
FS		 2760 LIST_FOREACH(port, p, s->ports)
2761 if (p->fd < 0 &&
2762 p->type == SOCKET_SPECIAL &&
563e6846 2763 path_equal_or_inode_same(p->path, value, 0)) {
77be02ad
FS		 2764 p->fd = fdset_remove(fds, fd);
2765 found = true;
2766 break;
2767 }
2768 if (!found)
2769 log_unit_debug(u, "No matching special socket found: %s", value);
2770
ee092817 2771 } else if (streq(key, "mqueue")) {
77be02ad
FS		 2772 _cleanup_free_ char *fdv = NULL;
2773 bool found = false;
2774 int fd;
ee092817 2775
77be02ad
FS		 2776 r = extract_first_word(&value, &fdv, NULL, 0);
2777 if (r <= 0) {
f2341e0a 2778 log_unit_debug(u, "Failed to parse mqueue value: %s", value);
77be02ad 2779 return 0;
3da0caf5 2780 }
ee092817 2781
77be02ad
FS		 2782 fd = parse_fd(fdv);
2783 if (fd < 0 || !fdset_contains(fds, fd)) {
2784 log_unit_debug(u, "Invalid mqueue value: %s", fdv);
2785 return 0;
2786 }
2787
2788 LIST_FOREACH(port, p, s->ports)
2789 if (p->fd < 0 &&
2790 p->type == SOCKET_MQUEUE &&
2791 streq(p->path, value)) {
2792 p->fd = fdset_remove(fds, fd);
2793 found = true;
2794 break;
2795 }
2796 if (!found)
2797 log_unit_debug(u, "No matching mqueue socket found: %s", value);
2798
a16e1123 2799 } else if (streq(key, "socket")) {
77be02ad
FS		 2800 _cleanup_free_ char *fdv = NULL, *typev = NULL;
2801 bool found = false;
2802 int fd, type;
2803
2804 r = extract_first_word(&value, &fdv, NULL, 0);
2805 if (r <= 0) {
2806 log_unit_debug(u, "Failed to parse socket fd from value: %s", value);
2807 return 0;
2808 }
a16e1123 2809
77be02ad
FS		 2810 fd = parse_fd(fdv);
2811 if (fd < 0 || !fdset_contains(fds, fd)) {
2812 log_unit_debug(u, "Invalid socket fd: %s", fdv);
2813 return 0;
2814 }
2815
2816 r = extract_first_word(&value, &typev, NULL, 0);
2817 if (r <= 0) {
2818 log_unit_debug(u, "Failed to parse socket type from value: %s", value);
2819 return 0;
2820 }
2821
2822 if (safe_atoi(typev, &type) < 0 || type < 0) {
2823 log_unit_debug(u, "Invalid socket type: %s", typev);
2824 return 0;
3da0caf5 2825 }
a16e1123 2826
77be02ad
FS		 2827 LIST_FOREACH(port, p, s->ports)
2828 if (p->fd < 0 &&
2829 socket_address_is(&p->address, value, type)) {
2830 p->fd = fdset_remove(fds, fd);
2831 found = true;
2832 break;
2833 }
2834 if (!found)
2835 log_unit_debug(u, "No matching %s socket found: %s",
2836 socket_address_type_to_string(type), value);
2837
7a22745a 2838 } else if (streq(key, "netlink")) {
77be02ad
FS		 2839 _cleanup_free_ char *fdv = NULL;
2840 bool found = false;
2841 int fd;
7a22745a 2842
77be02ad
FS		 2843 r = extract_first_word(&value, &fdv, NULL, 0);
2844 if (r <= 0) {
f2341e0a 2845 log_unit_debug(u, "Failed to parse socket value: %s", value);
77be02ad 2846 return 0;
3da0caf5 2847 }
60252446 2848
77be02ad
FS		 2849 fd = parse_fd(fdv);
2850 if (fd < 0 || !fdset_contains(fds, fd)) {
2851 log_unit_debug(u, "Invalid socket value: %s", fdv);
2852 return 0;
2853 }
2854
2855 LIST_FOREACH(port, p, s->ports)
2856 if (p->fd < 0 &&
2857 socket_address_is_netlink(&p->address, value)) {
2858 p->fd = fdset_remove(fds, fd);
2859 found = true;
2860 break;
2861 }
2862 if (!found)
2863 log_unit_debug(u, "No matching netlink socket found: %s", value);
2864
60252446 2865 } else if (streq(key, "ffs")) {
77be02ad
FS		 2866 _cleanup_free_ char *fdv = NULL;
2867 bool found = false;
2868 int fd;
60252446 2869
77be02ad
FS		 2870 r = extract_first_word(&value, &fdv, NULL, 0);
2871 if (r <= 0) {
60252446 2872 log_unit_debug(u, "Failed to parse ffs value: %s", value);
77be02ad
FS		 2873 return 0;
2874 }
2875
2876 fd = parse_fd(fdv);
2877 if (fd < 0 || !fdset_contains(fds, fd)) {
2878 log_unit_debug(u, "Invalid ffs value: %s", fdv);
2879 return 0;
3da0caf5 2880 }
60252446 2881
77be02ad
FS		 2882 LIST_FOREACH(port, p, s->ports)
2883 if (p->fd < 0 &&
2884 p->type == SOCKET_USB_FUNCTION &&
563e6846 2885 path_equal_or_inode_same(p->path, value, 0)) {
77be02ad
FS		 2886 p->fd = fdset_remove(fds, fd);
2887 found = true;
2888 break;
2889 }
2890 if (!found)
2891 log_unit_debug(u, "No matching ffs socket found: %s", value);
2892
51ad723d 2893 } else if (streq(key, "trigger-ratelimit"))
42fdb142 2894 (void) deserialize_ratelimit(&s->trigger_limit, key, value);
51ad723d 2895 else
f2341e0a 2896 log_unit_debug(UNIT(s), "Unknown serialization key: %s", key);
a16e1123
LP		 2897
2898 return 0;
2899}
2900
9ff1a6f1 2901static void socket_distribute_fds(Unit *u, FDSet *fds) {
e9fa1bf7 2902 Socket *s = ASSERT_PTR(SOCKET(u));
01e10de3
LP		 2903
2904 LIST_FOREACH(port, p, s->ports) {
01e10de3
LP		 2905 int fd;
2906
2907 if (p->type != SOCKET_SOCKET)
2908 continue;
2909
2910 if (p->fd >= 0)
2911 continue;
2912
90e74a66 2913 FDSET_FOREACH(fd, fds) {
01e10de3
LP		 2914 if (socket_address_matches_fd(&p->address, fd)) {
2915 p->fd = fdset_remove(fds, fd);
2916 s->deserialized_state = SOCKET_LISTENING;
2917 break;
2918 }
2919 }
2920 }
01e10de3
LP		 2921}
2922
d1e8e8b5 2923static UnitActiveState socket_active_state(Unit *u) {
e9fa1bf7 2924 Socket *s = ASSERT_PTR(SOCKET(u));
5cb5a6ff 2925
e9fa1bf7 2926 return state_translation_table[s->state];
5cb5a6ff
LP		 2927}
2928
d1e8e8b5 2929static const char *socket_sub_state_to_string(Unit *u) {
e9fa1bf7 2930 Socket *s = ASSERT_PTR(SOCKET(u));
10a94420 2931
e9fa1bf7 2932 return socket_state_to_string(s->state);
10a94420
LP		 2933}
2934
e49b2110
DDM		 2935int socket_port_to_address(const SocketPort *p, char **ret) {
2936 _cleanup_free_ char *address = NULL;
2937 int r;
2938
2939 assert(p);
2940 assert(ret);
2941
2942 switch (p->type) {
2943 case SOCKET_SOCKET: {
2944 r = socket_address_print(&p->address, &address);
2945 if (r < 0)
2946 return r;
2947
2948 break;
2949 }
2950
2951 case SOCKET_SPECIAL:
2952 case SOCKET_MQUEUE:
2953 case SOCKET_FIFO:
2954 case SOCKET_USB_FUNCTION:
2955 address = strdup(p->path);
2956 if (!address)
2957 return -ENOMEM;
2958 break;
2959
2960 default:
2961 assert_not_reached();
2962 }
2963
2964 *ret = TAKE_PTR(address);
2965
2966 return 0;
2967}
2968
67419600 2969const char* socket_port_type_to_string(SocketPort *p) {
67419600
OS		 2970 assert(p);
2971
2972 switch (p->type) {
718db961
LP		 2973
2974 case SOCKET_SOCKET:
2975
2976 switch (p->address.type) {
2977
2978 case SOCK_STREAM:
2979 return "Stream";
2980
2981 case SOCK_DGRAM:
2982 return "Datagram";
2983
2984 case SOCK_SEQPACKET:
2985 return "SequentialPacket";
2986
2987 case SOCK_RAW:
2988 if (socket_address_family(&p->address) == AF_NETLINK)
2989 return "Netlink";
2990
4831981d 2991 _fallthrough_;
718db961
LP		 2992 default:
2993 return NULL;
2994 }
2995
2996 case SOCKET_SPECIAL:
2997 return "Special";
2998
2999 case SOCKET_MQUEUE:
3000 return "MessageQueue";
3001
3002 case SOCKET_FIFO:
3003 return "FIFO";
3004
60252446
PS		 3005 case SOCKET_USB_FUNCTION:
3006 return "USBFunction";
3007
718db961
LP		 3008 default:
3009 return NULL;
67419600
OS		 3010 }
3011}
3012
038ed5a4
YW		 3013SocketType socket_port_type_from_string(const char *s) {
3014 assert(s);
3015
e045e325
YW		 3016 if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink"))
3017 return SOCKET_SOCKET;
3018 else if (streq(s, "Special"))
3019 return SOCKET_SPECIAL;
3020 else if (streq(s, "MessageQueue"))
3021 return SOCKET_MQUEUE;
3022 else if (streq(s, "FIFO"))
3023 return SOCKET_FIFO;
3024 else if (streq(s, "USBFunction"))
3025 return SOCKET_USB_FUNCTION;
038ed5a4
YW		 3026 else
3027 return _SOCKET_TYPE_INVALID;
3028}
3029
d1e8e8b5 3030static bool socket_may_gc(Unit *u) {
e9fa1bf7 3031 Socket *s = ASSERT_PTR(SOCKET(u));
6cf6bbc2 3032
f2f725e5 3033 return s->n_connections == 0;
6cf6bbc2
LP		 3034}
3035
a79279c7
LP		 3036static int socket_accept_do(Socket *s, int fd) {
3037 int cfd;
3038
3039 assert(s);
3040 assert(fd >= 0);
3041
4ff9bc2e
LP		 3042 cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
3043 if (cfd < 0)
3044 /* Convert transient network errors into clean and well-defined EAGAIN */
3045 return ERRNO_IS_ACCEPT_AGAIN(errno) ? -EAGAIN : -errno;
a79279c7
LP		 3046
3047 return cfd;
3048}
3049
3050static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) {
4775b55d 3051 _cleanup_(pidref_done) PidRef pid = PIDREF_NULL;
71136404 3052 _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
a79279c7 3053 int cfd, r;
a79279c7
LP		 3054
3055 assert(s);
3056 assert(p);
3057 assert(fd >= 0);
3058
5238e957 3059 /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any
a79279c7
LP		 3060 * connection socket is also properly associated with the cgroup. */
3061
3062 if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6))
3063 goto shortcut;
3064
ec3c5cfa 3065 if (bpf_program_supported() <= 0)
a79279c7
LP		 3066 goto shortcut;
3067
3068 if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0)
3069 return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m");
3070
5162829e 3071 r = unit_fork_helper_process(UNIT(s), "(sd-accept)", /* into_cgroup= */ true, &pid);
a79279c7
LP		 3072 if (r < 0)
3073 return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m");
3074 if (r == 0) {
3075 /* Child */
3076
3077 pair[0] = safe_close(pair[0]);
3078
3079 cfd = socket_accept_do(s, fd);
4ff9bc2e
LP		 3080 if (cfd == -EAGAIN) /* spurious accept() */
3081 _exit(EXIT_SUCCESS);
a79279c7
LP		 3082 if (cfd < 0) {
3083 log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m");
3084 _exit(EXIT_FAILURE);
3085 }
3086
3087 r = send_one_fd(pair[1], cfd, 0);
3088 if (r < 0) {
3089 log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m");
3090 _exit(EXIT_FAILURE);
3091 }
3092
3093 _exit(EXIT_SUCCESS);
3094 }
3095
3096 pair[1] = safe_close(pair[1]);
3097 cfd = receive_one_fd(pair[0], 0);
3098
3099 /* We synchronously wait for the helper, as it shouldn't be slow */
4775b55d 3100 r = wait_for_terminate_and_check("(sd-accept)", pid.pid, WAIT_LOG_ABNORMAL);
a79279c7
LP		 3101 if (r < 0) {
3102 safe_close(cfd);
3103 return r;
3104 }
3105
4ff9bc2e
LP		 3106 /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS
3107 * this is a spurious accept(), let's convert that back to EAGAIN here. */
3108 if (cfd == -EIO)
3109 return -EAGAIN;
a79279c7
LP		 3110 if (cfd < 0)
3111 return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m");
3112
3113 return cfd;
3114
3115shortcut:
3116 cfd = socket_accept_do(s, fd);
4ff9bc2e
LP		 3117 if (cfd == -EAGAIN) /* spurious accept(), skip it silently */
3118 return -EAGAIN;
a79279c7
LP		 3119 if (cfd < 0)
3120 return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m");
3121
3122 return cfd;
3123}
3124
718db961 3125static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
99534007 3126 SocketPort *p = ASSERT_PTR(userdata);
254d1313 3127 int cfd = -EBADF;
9152c765 3128
8d567588 3129 assert(fd >= 0);
9152c765 3130
718db961
LP		 3131 if (p->socket->state != SOCKET_LISTENING)
3132 return 0;
871d7de4 3133
f2341e0a 3134 log_unit_debug(UNIT(p->socket), "Incoming traffic");
9152c765 3135
718db961 3136 if (revents != EPOLLIN) {
718db961 3137 if (revents & EPOLLHUP)
f2341e0a 3138 log_unit_error(UNIT(p->socket), "Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.");
641e01dc 3139 else
f2341e0a 3140 log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents);
8d567588 3141 goto fail;
4f2d528d
LP		 3142 }
3143
718db961
LP		 3144 if (p->socket->accept &&
3145 p->type == SOCKET_SOCKET &&
3146 socket_address_can_accept(&p->address)) {
3147
a79279c7 3148 cfd = socket_accept_in_cgroup(p->socket, p, fd);
4ff9bc2e
LP		 3149 if (cfd == -EAGAIN) /* Spurious accept() */
3150 return 0;
a79279c7
LP		 3151 if (cfd < 0)
3152 goto fail;
4fd5948e 3153
5d0fe423 3154 socket_apply_socket_options(p->socket, p, cfd);
4f2d528d 3155 }
9152c765 3156
718db961
LP		 3157 socket_enter_running(p->socket, cfd);
3158 return 0;
8d567588
LP		 3159
3160fail:
718db961
LP		 3161 socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES);
3162 return 0;
9152c765
LP		 3163}
3164
87f0e418 3165static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
e9fa1bf7 3166 Socket *s = ASSERT_PTR(SOCKET(u));
cfc4eb4c 3167 SocketResult f;
5cb5a6ff 3168
034c6ed7 3169 assert(pid >= 0);
5cb5a6ff 3170
43a19142 3171 if (pid != s->control_pid.pid)
8c47c732 3172 return;
542563ba 3173
43a19142 3174 pidref_done(&s->control_pid);
034c6ed7 3175
1f0958f6 3176 if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL))
cfc4eb4c
LP		 3177 f = SOCKET_SUCCESS;
3178 else if (code == CLD_EXITED)
3179 f = SOCKET_FAILURE_EXIT_CODE;
3180 else if (code == CLD_KILLED)
3181 f = SOCKET_FAILURE_SIGNAL;
3182 else if (code == CLD_DUMPED)
3183 f = SOCKET_FAILURE_CORE_DUMP;
3184 else
04499a70 3185 assert_not_reached();
8c47c732 3186
b708e7ce 3187 if (s->control_command) {
6ea832a2 3188 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
a16e1123 3189
3ed0cd26 3190 if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
cfc4eb4c 3191 f = SOCKET_SUCCESS;
b708e7ce
LP		 3192 }
3193
91bbd9b7 3194 unit_log_process_exit(
5cc2cd1c 3195 u,
91bbd9b7
LP		 3196 "Control process",
3197 socket_exec_command_to_string(s->control_command_id),
5cc2cd1c 3198 f == SOCKET_SUCCESS,
91bbd9b7 3199 code, status);
034c6ed7 3200
a0fef983 3201 if (s->result == SOCKET_SUCCESS)
cfc4eb4c
LP		 3202 s->result = f;
3203
3204 if (s->control_command &&
3205 s->control_command->command_next &&
3206 f == SOCKET_SUCCESS) {
3207
f2341e0a 3208 log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state));
cfc4eb4c 3209 socket_run_next(s);
acbb0225 3210 } else {
a16e1123
LP		 3211 s->control_command = NULL;
3212 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
3213
034c6ed7
LP		 3214 /* No further commands for this step, so let's figure
3215 * out what to do next */
5cb5a6ff 3216
f2341e0a 3217 log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state));
acbb0225 3218
034c6ed7
LP		 3219 switch (s->state) {
3220
3221 case SOCKET_START_PRE:
cfc4eb4c 3222 if (f == SOCKET_SUCCESS)
58a86a15 3223 socket_enter_start_open(s);
034c6ed7 3224 else
cfc4eb4c 3225 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
034c6ed7
LP		 3226 break;
3227
3900e5fd
LP		 3228 case SOCKET_START_CHOWN:
3229 if (f == SOCKET_SUCCESS)
3230 socket_enter_start_post(s);
3231 else
3232 socket_enter_stop_pre(s, f);
3233 break;
3234
034c6ed7 3235 case SOCKET_START_POST:
cfc4eb4c 3236 if (f == SOCKET_SUCCESS)
e9af15c3 3237 socket_enter_listening(s);
034c6ed7 3238 else
cfc4eb4c 3239 socket_enter_stop_pre(s, f);
034c6ed7
LP		 3240 break;
3241
3242 case SOCKET_STOP_PRE:
3243 case SOCKET_STOP_PRE_SIGTERM:
3244 case SOCKET_STOP_PRE_SIGKILL:
cfc4eb4c 3245 socket_enter_stop_post(s, f);
034c6ed7
LP		 3246 break;
3247
3248 case SOCKET_STOP_POST:
80876c20
LP		 3249 case SOCKET_FINAL_SIGTERM:
3250 case SOCKET_FINAL_SIGKILL:
cfc4eb4c 3251 socket_enter_dead(s, f);
034c6ed7
LP		 3252 break;
3253
c968d76a
YW		 3254 case SOCKET_CLEANING:
3255
3256 if (s->clean_result == SOCKET_SUCCESS)
3257 s->clean_result = f;
3258
3259 socket_enter_dead(s, SOCKET_SUCCESS);
3260 break;
3261
034c6ed7 3262 default:
04499a70 3263 assert_not_reached();
034c6ed7
LP		 3264 }
3265 }
c4e2ceae
LP		 3266
3267 /* Notify clients about changed exit status */
3268 unit_add_to_dbus_queue(u);
034c6ed7 3269}
5cb5a6ff 3270
718db961 3271static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
e9fa1bf7 3272 Socket *s = ASSERT_PTR(SOCKET(userdata));
5cb5a6ff 3273
718db961 3274 assert(s->timer_event_source == source);
034c6ed7
LP		 3275
3276 switch (s->state) {
3277
3278 case SOCKET_START_PRE:
f2341e0a 3279 log_unit_warning(UNIT(s), "Starting timed out. Terminating.");
cfc4eb4c 3280 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
da19d5c1 3281 break;
80876c20 3282
3900e5fd 3283 case SOCKET_START_CHOWN:
034c6ed7 3284 case SOCKET_START_POST:
f2341e0a 3285 log_unit_warning(UNIT(s), "Starting timed out. Stopping.");
cfc4eb4c 3286 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 3287 break;
3288
3289 case SOCKET_STOP_PRE:
f2341e0a 3290 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
cfc4eb4c 3291 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 3292 break;
3293
3294 case SOCKET_STOP_PRE_SIGTERM:
4819ff03 3295 if (s->kill_context.send_sigkill) {
f2341e0a 3296 log_unit_warning(UNIT(s), "Stopping timed out. Killing.");
cfc4eb4c 3297 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
ba035df2 3298 } else {
f2341e0a 3299 log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring.");
cfc4eb4c 3300 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
ba035df2 3301 }
034c6ed7
LP		 3302 break;
3303
3304 case SOCKET_STOP_PRE_SIGKILL:
f2341e0a 3305 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
cfc4eb4c 3306 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 3307 break;
3308
3309 case SOCKET_STOP_POST:
f2341e0a 3310 log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating.");
cfc4eb4c 3311 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 3312 break;
3313
80876c20 3314 case SOCKET_FINAL_SIGTERM:
4819ff03 3315 if (s->kill_context.send_sigkill) {
f2341e0a 3316 log_unit_warning(UNIT(s), "Stopping timed out (2). Killing.");
cfc4eb4c 3317 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
ba035df2 3318 } else {
f2341e0a 3319 log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring.");
cfc4eb4c 3320 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
ba035df2 3321 }
034c6ed7
LP		 3322 break;
3323
80876c20 3324 case SOCKET_FINAL_SIGKILL:
f2341e0a 3325 log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode.");
cfc4eb4c 3326 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 3327 break;
3328
c968d76a
YW		 3329 case SOCKET_CLEANING:
3330 log_unit_warning(UNIT(s), "Cleaning timed out. killing.");
3331
3332 if (s->clean_result == SOCKET_SUCCESS)
3333 s->clean_result = SOCKET_FAILURE_TIMEOUT;
3334
3335 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, 0);
3336 break;
3337
034c6ed7 3338 default:
04499a70 3339 assert_not_reached();
034c6ed7 3340 }
718db961
LP		 3341
3342 return 0;
5cb5a6ff
LP		 3343}
3344
54668cb9
MY		 3345int socket_collect_fds(Socket *s, int **ret) {
3346 size_t n = 0, k = 0;
44d8db9e
LP		 3347
3348 assert(s);
54668cb9 3349 assert(ret);
44d8db9e
LP		 3350
3351 /* Called from the service code for requesting our fds */
3352
15087cdb 3353 LIST_FOREACH(port, p, s->ports) {
44d8db9e 3354 if (p->fd >= 0)
79c7626d
LP		 3355 n++;
3356 n += p->n_auxiliary_fds;
15087cdb 3357 }
44d8db9e 3358
54668cb9
MY		 3359 if (n == 0) {
3360 *ret = NULL;
de3756ab
LP		 3361 return 0;
3362 }
3363
54668cb9
MY		 3364 int *fds = new(int, n);
3365 if (!fds)
44d8db9e
LP		 3366 return -ENOMEM;
3367
15087cdb 3368 LIST_FOREACH(port, p, s->ports) {
44d8db9e 3369 if (p->fd >= 0)
54668cb9
MY		 3370 fds[k++] = p->fd;
3371 FOREACH_ARRAY(i, p->auxiliary_fds, p->n_auxiliary_fds)
3372 fds[k++] = *i;
15087cdb 3373 }
44d8db9e 3374
79c7626d 3375 assert(k == n);
44d8db9e 3376
54668cb9 3377 *ret = fds;
da6053d0 3378 return (int) n;
44d8db9e
LP		 3379}
3380
e821075a
LP		 3381static void socket_reset_failed(Unit *u) {
3382 Socket *s = SOCKET(u);
3383
3384 assert(s);
3385
3386 if (s->state == SOCKET_FAILED)
3387 socket_set_state(s, SOCKET_DEAD);
3388
3389 s->result = SOCKET_SUCCESS;
c968d76a 3390 s->clean_result = SOCKET_SUCCESS;
e821075a
LP		 3391}
3392
6cf6bbc2
LP		 3393void socket_connection_unref(Socket *s) {
3394 assert(s);
3395
3396 /* The service is dead. Yay!
3397 *
35b8ca3a 3398 * This is strictly for one-instance-per-connection
6cf6bbc2
LP		 3399 * services. */
3400
3401 assert(s->n_connections > 0);
3402 s->n_connections--;
3403
f2341e0a 3404 log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections);
5632e374
LP		 3405}
3406
d137a488 3407static void socket_trigger_notify(Unit *u, Unit *other) {
e9fa1bf7 3408 Socket *s = ASSERT_PTR(SOCKET(u));
d137a488 3409
d137a488
UTL		 3410 assert(other);
3411
d14e3a0d 3412 /* Filter out invocations with bogus state */
0377cd29 3413 assert(UNIT_IS_LOAD_COMPLETE(other->load_state));
4c523d62
MY		 3414
3415 Service *service = ASSERT_PTR(SERVICE(other));
d14e3a0d
LP		 3416
3417 /* Don't propagate state changes from the service if we are already down */
3418 if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING))
d137a488
UTL		 3419 return;
3420
d14e3a0d
LP		 3421 /* We don't care for the service state if we are in Accept=yes mode */
3422 if (s->accept)
3423 return;
3424
3425 /* Propagate start limit hit state */
6bf0f408
LP		 3426 if (other->start_limit_hit) {
3427 socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT);
d137a488 3428 return;
6bf0f408 3429 }
d137a488 3430
d14e3a0d
LP		 3431 /* Don't propagate anything if there's still a job queued */
3432 if (other->job)
6bf0f408 3433 return;
d137a488 3434
4c523d62
MY		 3435 if (!SOCKET_SERVICE_IS_ACTIVE(service, /* allow_finalize = */ true))
3436 socket_enter_listening(s);
d137a488 3437
6bf0f408 3438 if (SERVICE(other)->state == SERVICE_RUNNING)
d137a488
UTL		 3439 socket_set_state(s, SOCKET_RUNNING);
3440}
3441
1f41b10e
LP		 3442static void socket_handoff_timestamp(
3443 Unit *u,
3444 const struct ucred *ucred,
3445 const dual_timestamp *ts) {
3446
3447 Socket *s = ASSERT_PTR(SOCKET(u));
3448
3449 assert(ucred);
3450 assert(ts);
3451
3452 if (s->control_pid.pid == ucred->pid && s->control_command) {
3453 exec_status_handoff(&s->control_command->exec_status, ucred, ts);
3454 unit_add_to_dbus_queue(u);
3455 }
3456}
3457
7a7821c8 3458static int socket_get_timeout(Unit *u, usec_t *timeout) {
e9fa1bf7 3459 Socket *s = ASSERT_PTR(SOCKET(u));
7a7821c8 3460 usec_t t;
68db7a3b
ZJS		 3461 int r;
3462
3463 if (!s->timer_event_source)
3464 return 0;
3465
7a7821c8 3466 r = sd_event_source_get_time(s->timer_event_source, &t);
68db7a3b
ZJS		 3467 if (r < 0)
3468 return r;
7a7821c8
LP		 3469 if (t == USEC_INFINITY)
3470 return 0;
68db7a3b 3471
7a7821c8 3472 *timeout = t;
68db7a3b
ZJS		 3473 return 1;
3474}
3475
daa78907 3476const char* socket_fdname(Socket *s) {
8dd4c05b
LP		 3477 assert(s);
3478
daa78907
MY		 3479 /* Returns the name to use for $LISTEN_FDNAMES. If the user didn't specify anything specifically,
3480 * use the socket unit's name as fallback for Accept=no sockets, "connection" otherwise. */
3481
3482 if (s->fdname)
3483 return s->fdname;
3484
3485 if (s->accept)
3486 return "connection";
8dd4c05b 3487
daa78907 3488 return UNIT(s)->id;
8dd4c05b
LP		 3489}
3490
daa78907 3491static PidRef* socket_control_pid(Unit *u) {
37eb258e 3492 return &ASSERT_PTR(SOCKET(u))->control_pid;
291d565a
LP		 3493}
3494
c968d76a 3495static int socket_clean(Unit *u, ExecCleanMask mask) {
e9fa1bf7 3496 Socket *s = ASSERT_PTR(SOCKET(u));
c968d76a 3497 _cleanup_strv_free_ char **l = NULL;
c968d76a
YW		 3498 int r;
3499
c968d76a
YW		 3500 assert(mask != 0);
3501
3502 if (s->state != SOCKET_DEAD)
3503 return -EBUSY;
3504
3505 r = exec_context_get_clean_directories(&s->exec_context, u->manager->prefix, mask, &l);
3506 if (r < 0)
3507 return r;
3508
3509 if (strv_isempty(l))
3510 return -EUNATCH;
3511
3512 socket_unwatch_control_pid(s);
3513 s->clean_result = SOCKET_SUCCESS;
3514 s->control_command = NULL;
3515 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
3516
e9276800 3517 r = socket_arm_timer(s, /* relative= */ true, s->exec_context.timeout_clean_usec);
a237a93e
LP		 3518 if (r < 0) {
3519 log_unit_warning_errno(u, r, "Failed to install timer: %m");
c968d76a 3520 goto fail;
a237a93e 3521 }
c968d76a 3522
4775b55d 3523 r = unit_fork_and_watch_rm_rf(u, l, &s->control_pid);
a237a93e
LP		 3524 if (r < 0) {
3525 log_unit_warning_errno(u, r, "Failed to spawn cleaning task: %m");
43a19142 3526 goto fail;
a237a93e 3527 }
c968d76a 3528
43a19142 3529 socket_set_state(s, SOCKET_CLEANING);
c968d76a
YW		 3530 return 0;
3531
3532fail:
c968d76a 3533 s->clean_result = SOCKET_FAILURE_RESOURCES;
5dcadb4c 3534 s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source);
c968d76a
YW		 3535 return r;
3536}
3537
3538static int socket_can_clean(Unit *u, ExecCleanMask *ret) {
e9fa1bf7 3539 Socket *s = ASSERT_PTR(SOCKET(u));
c968d76a
YW		 3540
3541 return exec_context_get_clean_mask(&s->exec_context, ret);
3542}
3543
705578c3 3544static int socket_can_start(Unit *u) {
e9fa1bf7 3545 Socket *s = ASSERT_PTR(SOCKET(u));
9727f242
DDM		 3546 int r;
3547
9727f242
DDM		 3548 r = unit_test_start_limit(u);
3549 if (r < 0) {
3550 socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT);
3551 return r;
3552 }
3553
705578c3 3554 return 1;
9727f242
DDM		 3555}
3556
a16e1123 3557static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
48d83e33 3558 [SOCKET_EXEC_START_PRE] = "ExecStartPre",
836bb1cd 3559 [SOCKET_EXEC_START_CHOWN] = "ExecStartChown",
48d83e33
ZJS		 3560 [SOCKET_EXEC_START_POST] = "ExecStartPost",
3561 [SOCKET_EXEC_STOP_PRE] = "ExecStopPre",
17f6b640 3562 [SOCKET_EXEC_STOP_POST] = "ExecStopPost",
a16e1123
LP		 3563};
3564
3565DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
3566
cfc4eb4c 3567static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
40f41f34
DDM		 3568 [SOCKET_SUCCESS] = "success",
3569 [SOCKET_FAILURE_RESOURCES] = "resources",
3570 [SOCKET_FAILURE_TIMEOUT] = "timeout",
3571 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
3572 [SOCKET_FAILURE_SIGNAL] = "signal",
3573 [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
3574 [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3575 [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit",
17f6b640 3576 [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit",
cfc4eb4c
LP		 3577};
3578
3579DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
3580
9b191525
LP		 3581static const char* const socket_timestamping_table[_SOCKET_TIMESTAMPING_MAX] = {
3582 [SOCKET_TIMESTAMPING_OFF] = "off",
48d83e33
ZJS		 3583 [SOCKET_TIMESTAMPING_US] = "us",
3584 [SOCKET_TIMESTAMPING_NS] = "ns",
9b191525
LP		 3585};
3586
3587DEFINE_STRING_TABLE_LOOKUP(socket_timestamping, SocketTimestamping);
3588
3589SocketTimestamping socket_timestamping_from_string_harder(const char *p) {
3590 SocketTimestamping t;
3591 int r;
3592
3593 if (!p)
3594 return _SOCKET_TIMESTAMPING_INVALID;
3595
3596 t = socket_timestamping_from_string(p);
3597 if (t >= 0)
3598 return t;
3599
3600 /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here,
3601 * too. */
3602 if (streq(p, "nsec"))
3603 return SOCKET_TIMESTAMPING_NS;
d0a6d7c4 3604 if (STR_IN_SET(p, "usec", "µs", "μs")) /* Accept both small greek letter mu + micro sign unicode codepoints */
9b191525
LP		 3605 return SOCKET_TIMESTAMPING_US;
3606
3607 r = parse_boolean(p);
3608 if (r < 0)
3609 return _SOCKET_TIMESTAMPING_INVALID;
3610
3611 return r ? SOCKET_TIMESTAMPING_NS : SOCKET_TIMESTAMPING_OFF; /* If boolean yes, default to ns accuracy */
3612}
3613
87f0e418 3614const UnitVTable socket_vtable = {
7d17cfbc 3615 .object_size = sizeof(Socket),
718db961
LP		 3616 .exec_context_offset = offsetof(Socket, exec_context),
3617 .cgroup_context_offset = offsetof(Socket, cgroup_context),
3618 .kill_context_offset = offsetof(Socket, kill_context),
613b411c 3619 .exec_runtime_offset = offsetof(Socket, exec_runtime),
9cc54544 3620 .cgroup_runtime_offset = offsetof(Socket, cgroup_runtime),
3ef63c31 3621
f975e971
LP		 3622 .sections =
3623 "Unit\0"
3624 "Socket\0"
3625 "Install\0",
4ad49000 3626 .private_section = "Socket",
71645aca 3627
9c0320e7 3628 .can_transient = true,
c80a9a33
LP		 3629 .can_trigger = true,
3630 .can_fail = true,
9c0320e7 3631
034c6ed7
LP		 3632 .init = socket_init,
3633 .done = socket_done,
a16e1123
LP		 3634 .load = socket_load,
3635
3636 .coldplug = socket_coldplug,
034c6ed7 3637
5cb5a6ff
LP		 3638 .dump = socket_dump,
3639
542563ba
LP		 3640 .start = socket_start,
3641 .stop = socket_stop,
5cb5a6ff 3642
c968d76a
YW		 3643 .clean = socket_clean,
3644 .can_clean = socket_can_clean,
718db961 3645
68db7a3b
ZJS		 3646 .get_timeout = socket_get_timeout,
3647
a16e1123
LP		 3648 .serialize = socket_serialize,
3649 .deserialize_item = socket_deserialize_item,
01e10de3 3650 .distribute_fds = socket_distribute_fds,
a16e1123 3651
5cb5a6ff 3652 .active_state = socket_active_state,
10a94420 3653 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 3654
52a12341
YW		 3655 .will_restart = unit_will_restart_default,
3656
f2f725e5 3657 .may_gc = socket_may_gc,
6cf6bbc2 3658
034c6ed7 3659 .sigchld_event = socket_sigchld_event,
4139c1b2 3660
d137a488
UTL		 3661 .trigger_notify = socket_trigger_notify,
3662
fdf20a31 3663 .reset_failed = socket_reset_failed,
5632e374 3664
1f41b10e
LP		 3665 .notify_handoff_timestamp = socket_handoff_timestamp,
3666
291d565a
LP		 3667 .control_pid = socket_control_pid,
3668
74c964d3
LP		 3669 .bus_set_property = bus_socket_set_property,
3670 .bus_commit_properties = bus_socket_commit_properties,
c6918296
MS		 3671
3672 .status_message_formats = {
c6918296
MS		 3673 .finished_start_job = {
3674 [JOB_DONE] = "Listening on %s.",
3675 [JOB_FAILED] = "Failed to listen on %s.",
c6918296
MS		 3676 [JOB_TIMEOUT] = "Timed out starting %s.",
3677 },
3678 .finished_stop_job = {
3679 [JOB_DONE] = "Closed %s.",
3680 [JOB_FAILED] = "Failed stopping %s.",
3681 [JOB_TIMEOUT] = "Timed out stopping %s.",
3682 },
3683 },
9727f242 3684
705578c3 3685 .can_start = socket_can_start,
5cb5a6ff 3686};
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