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main: unset some bash specific environment variables that might get leaked to us
[thirdparty/systemd.git] / src / core / socket.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <unistd.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <sys/epoll.h>
28 #include <signal.h>
29 #include <arpa/inet.h>
30 #include <mqueue.h>
31
32 #include "unit.h"
33 #include "socket.h"
34 #include "netinet/tcp.h"
35 #include "log.h"
36 #include "load-dropin.h"
37 #include "load-fragment.h"
38 #include "strv.h"
39 #include "mkdir.h"
40 #include "unit-name.h"
41 #include "dbus-socket.h"
42 #include "missing.h"
43 #include "special.h"
44 #include "bus-errors.h"
45 #include "label.h"
46 #include "exit-status.h"
47 #include "def.h"
48
49 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
50 [SOCKET_DEAD] = UNIT_INACTIVE,
51 [SOCKET_START_PRE] = UNIT_ACTIVATING,
52 [SOCKET_START_POST] = UNIT_ACTIVATING,
53 [SOCKET_LISTENING] = UNIT_ACTIVE,
54 [SOCKET_RUNNING] = UNIT_ACTIVE,
55 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
57 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
58 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
59 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
60 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
61 [SOCKET_FAILED] = UNIT_FAILED
62 };
63
64 static void socket_init(Unit *u) {
65 Socket *s = SOCKET(u);
66
67 assert(u);
68 assert(u->load_state == UNIT_STUB);
69
70 s->backlog = SOMAXCONN;
71 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
72 s->directory_mode = 0755;
73 s->socket_mode = 0666;
74
75 s->max_connections = 64;
76
77 s->priority = -1;
78 s->ip_tos = -1;
79 s->ip_ttl = -1;
80 s->mark = -1;
81
82 exec_context_init(&s->exec_context);
83 s->exec_context.std_output = u->manager->default_std_output;
84 s->exec_context.std_error = u->manager->default_std_error;
85
86 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
87 }
88
89 static void socket_unwatch_control_pid(Socket *s) {
90 assert(s);
91
92 if (s->control_pid <= 0)
93 return;
94
95 unit_unwatch_pid(UNIT(s), s->control_pid);
96 s->control_pid = 0;
97 }
98
99 static void socket_done(Unit *u) {
100 Socket *s = SOCKET(u);
101 SocketPort *p;
102
103 assert(s);
104
105 while ((p = s->ports)) {
106 LIST_REMOVE(SocketPort, port, s->ports, p);
107
108 if (p->fd >= 0) {
109 unit_unwatch_fd(UNIT(s), &p->fd_watch);
110 close_nointr_nofail(p->fd);
111 }
112
113 free(p->path);
114 free(p);
115 }
116
117 exec_context_done(&s->exec_context);
118 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
119 s->control_command = NULL;
120
121 socket_unwatch_control_pid(s);
122
123 unit_ref_unset(&s->service);
124
125 free(s->tcp_congestion);
126 s->tcp_congestion = NULL;
127
128 free(s->bind_to_device);
129 s->bind_to_device = NULL;
130
131 unit_unwatch_timer(u, &s->timer_watch);
132 }
133
134 static int socket_instantiate_service(Socket *s) {
135 char *prefix, *name;
136 int r;
137 Unit *u;
138
139 assert(s);
140
141 /* This fills in s->service if it isn't filled in yet. For
142 * Accept=yes sockets we create the next connection service
143 * here. For Accept=no this is mostly a NOP since the service
144 * is figured out at load time anyway. */
145
146 if (UNIT_DEREF(s->service))
147 return 0;
148
149 assert(s->accept);
150
151 if (!(prefix = unit_name_to_prefix(UNIT(s)->id)))
152 return -ENOMEM;
153
154 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
155 free(prefix);
156
157 if (r < 0)
158 return -ENOMEM;
159
160 r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
161 free(name);
162
163 if (r < 0)
164 return r;
165
166 #ifdef HAVE_SYSV_COMPAT
167 if (SERVICE(u)->sysv_path) {
168 log_error("Using SysV services for socket activation is not supported. Refusing.");
169 return -ENOENT;
170 }
171 #endif
172
173 u->no_gc = true;
174 unit_ref_set(&s->service, u);
175
176 return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
177 }
178
179 static bool have_non_accept_socket(Socket *s) {
180 SocketPort *p;
181
182 assert(s);
183
184 if (!s->accept)
185 return true;
186
187 LIST_FOREACH(port, p, s->ports) {
188
189 if (p->type != SOCKET_SOCKET)
190 return true;
191
192 if (!socket_address_can_accept(&p->address))
193 return true;
194 }
195
196 return false;
197 }
198
199 static int socket_verify(Socket *s) {
200 assert(s);
201
202 if (UNIT(s)->load_state != UNIT_LOADED)
203 return 0;
204
205 if (!s->ports) {
206 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->id);
207 return -EINVAL;
208 }
209
210 if (s->accept && have_non_accept_socket(s)) {
211 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", UNIT(s)->id);
212 return -EINVAL;
213 }
214
215 if (s->accept && s->max_connections <= 0) {
216 log_error("%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
217 return -EINVAL;
218 }
219
220 if (s->accept && UNIT_DEREF(s->service)) {
221 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id);
222 return -EINVAL;
223 }
224
225 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
226 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
227 return -EINVAL;
228 }
229
230 return 0;
231 }
232
233 static bool socket_needs_mount(Socket *s, const char *prefix) {
234 SocketPort *p;
235
236 assert(s);
237
238 LIST_FOREACH(port, p, s->ports) {
239
240 if (p->type == SOCKET_SOCKET) {
241 if (socket_address_needs_mount(&p->address, prefix))
242 return true;
243 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
244 if (path_startswith(p->path, prefix))
245 return true;
246 }
247 }
248
249 return false;
250 }
251
252 int socket_add_one_mount_link(Socket *s, Mount *m) {
253 int r;
254
255 assert(s);
256 assert(m);
257
258 if (UNIT(s)->load_state != UNIT_LOADED ||
259 UNIT(m)->load_state != UNIT_LOADED)
260 return 0;
261
262 if (!socket_needs_mount(s, m->where))
263 return 0;
264
265 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
266 return r;
267
268 return 0;
269 }
270
271 static int socket_add_mount_links(Socket *s) {
272 Unit *other;
273 int r;
274
275 assert(s);
276
277 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT])
278 if ((r = socket_add_one_mount_link(s, MOUNT(other))) < 0)
279 return r;
280
281 return 0;
282 }
283
284 static int socket_add_device_link(Socket *s) {
285 char *t;
286 int r;
287
288 assert(s);
289
290 if (!s->bind_to_device)
291 return 0;
292
293 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
294 return -ENOMEM;
295
296 r = unit_add_node_link(UNIT(s), t, false);
297 free(t);
298
299 return r;
300 }
301
302 static int socket_add_default_dependencies(Socket *s) {
303 int r;
304 assert(s);
305
306 if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
307 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
308 return r;
309
310 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
311 return r;
312 }
313
314 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
315 }
316
317 static bool socket_has_exec(Socket *s) {
318 unsigned i;
319 assert(s);
320
321 for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
322 if (s->exec_command[i])
323 return true;
324
325 return false;
326 }
327
328 static int socket_load(Unit *u) {
329 Socket *s = SOCKET(u);
330 int r;
331
332 assert(u);
333 assert(u->load_state == UNIT_STUB);
334
335 if ((r = unit_load_fragment_and_dropin(u)) < 0)
336 return r;
337
338 /* This is a new unit? Then let's add in some extras */
339 if (u->load_state == UNIT_LOADED) {
340
341 if (have_non_accept_socket(s)) {
342
343 if (!UNIT_DEREF(s->service)) {
344 Unit *x;
345
346 r = unit_load_related_unit(u, ".service", &x);
347 if (r < 0)
348 return r;
349
350 unit_ref_set(&s->service, x);
351 }
352
353 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
354 if (r < 0)
355 return r;
356 }
357
358 if ((r = socket_add_mount_links(s)) < 0)
359 return r;
360
361 if ((r = socket_add_device_link(s)) < 0)
362 return r;
363
364 if (socket_has_exec(s))
365 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
366 return r;
367
368 if ((r = unit_add_default_cgroups(u)) < 0)
369 return r;
370
371 if (UNIT(s)->default_dependencies)
372 if ((r = socket_add_default_dependencies(s)) < 0)
373 return r;
374 }
375
376 return socket_verify(s);
377 }
378
379 static const char* listen_lookup(int family, int type) {
380
381 if (family == AF_NETLINK)
382 return "ListenNetlink";
383
384 if (type == SOCK_STREAM)
385 return "ListenStream";
386 else if (type == SOCK_DGRAM)
387 return "ListenDatagram";
388 else if (type == SOCK_SEQPACKET)
389 return "ListenSequentialPacket";
390
391 assert_not_reached("Unknown socket type");
392 return NULL;
393 }
394
395 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
396
397 SocketExecCommand c;
398 Socket *s = SOCKET(u);
399 SocketPort *p;
400 const char *prefix2;
401 char *p2;
402
403 assert(s);
404 assert(f);
405
406 p2 = strappend(prefix, "\t");
407 prefix2 = p2 ? p2 : prefix;
408
409 fprintf(f,
410 "%sSocket State: %s\n"
411 "%sResult: %s\n"
412 "%sBindIPv6Only: %s\n"
413 "%sBacklog: %u\n"
414 "%sSocketMode: %04o\n"
415 "%sDirectoryMode: %04o\n"
416 "%sKeepAlive: %s\n"
417 "%sFreeBind: %s\n"
418 "%sTransparent: %s\n"
419 "%sBroadcast: %s\n"
420 "%sPassCredentials: %s\n"
421 "%sPassSecurity: %s\n"
422 "%sTCPCongestion: %s\n",
423 prefix, socket_state_to_string(s->state),
424 prefix, socket_result_to_string(s->result),
425 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
426 prefix, s->backlog,
427 prefix, s->socket_mode,
428 prefix, s->directory_mode,
429 prefix, yes_no(s->keep_alive),
430 prefix, yes_no(s->free_bind),
431 prefix, yes_no(s->transparent),
432 prefix, yes_no(s->broadcast),
433 prefix, yes_no(s->pass_cred),
434 prefix, yes_no(s->pass_sec),
435 prefix, strna(s->tcp_congestion));
436
437 if (s->control_pid > 0)
438 fprintf(f,
439 "%sControl PID: %lu\n",
440 prefix, (unsigned long) s->control_pid);
441
442 if (s->bind_to_device)
443 fprintf(f,
444 "%sBindToDevice: %s\n",
445 prefix, s->bind_to_device);
446
447 if (s->accept)
448 fprintf(f,
449 "%sAccepted: %u\n"
450 "%sNConnections: %u\n"
451 "%sMaxConnections: %u\n",
452 prefix, s->n_accepted,
453 prefix, s->n_connections,
454 prefix, s->max_connections);
455
456 if (s->priority >= 0)
457 fprintf(f,
458 "%sPriority: %i\n",
459 prefix, s->priority);
460
461 if (s->receive_buffer > 0)
462 fprintf(f,
463 "%sReceiveBuffer: %zu\n",
464 prefix, s->receive_buffer);
465
466 if (s->send_buffer > 0)
467 fprintf(f,
468 "%sSendBuffer: %zu\n",
469 prefix, s->send_buffer);
470
471 if (s->ip_tos >= 0)
472 fprintf(f,
473 "%sIPTOS: %i\n",
474 prefix, s->ip_tos);
475
476 if (s->ip_ttl >= 0)
477 fprintf(f,
478 "%sIPTTL: %i\n",
479 prefix, s->ip_ttl);
480
481 if (s->pipe_size > 0)
482 fprintf(f,
483 "%sPipeSize: %zu\n",
484 prefix, s->pipe_size);
485
486 if (s->mark >= 0)
487 fprintf(f,
488 "%sMark: %i\n",
489 prefix, s->mark);
490
491 if (s->mq_maxmsg > 0)
492 fprintf(f,
493 "%sMessageQueueMaxMessages: %li\n",
494 prefix, s->mq_maxmsg);
495
496 if (s->mq_msgsize > 0)
497 fprintf(f,
498 "%sMessageQueueMessageSize: %li\n",
499 prefix, s->mq_msgsize);
500
501 LIST_FOREACH(port, p, s->ports) {
502
503 if (p->type == SOCKET_SOCKET) {
504 const char *t;
505 int r;
506 char *k = NULL;
507
508 if ((r = socket_address_print(&p->address, &k)) < 0)
509 t = strerror(-r);
510 else
511 t = k;
512
513 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
514 free(k);
515 } else if (p->type == SOCKET_SPECIAL)
516 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
517 else if (p->type == SOCKET_MQUEUE)
518 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
519 else
520 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
521 }
522
523 exec_context_dump(&s->exec_context, f, prefix);
524
525 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
526 if (!s->exec_command[c])
527 continue;
528
529 fprintf(f, "%s-> %s:\n",
530 prefix, socket_exec_command_to_string(c));
531
532 exec_command_dump_list(s->exec_command[c], f, prefix2);
533 }
534
535 free(p2);
536 }
537
538 static int instance_from_socket(int fd, unsigned nr, char **instance) {
539 socklen_t l;
540 char *r;
541 union {
542 struct sockaddr sa;
543 struct sockaddr_un un;
544 struct sockaddr_in in;
545 struct sockaddr_in6 in6;
546 struct sockaddr_storage storage;
547 } local, remote;
548
549 assert(fd >= 0);
550 assert(instance);
551
552 l = sizeof(local);
553 if (getsockname(fd, &local.sa, &l) < 0)
554 return -errno;
555
556 l = sizeof(remote);
557 if (getpeername(fd, &remote.sa, &l) < 0)
558 return -errno;
559
560 switch (local.sa.sa_family) {
561
562 case AF_INET: {
563 uint32_t
564 a = ntohl(local.in.sin_addr.s_addr),
565 b = ntohl(remote.in.sin_addr.s_addr);
566
567 if (asprintf(&r,
568 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
569 nr,
570 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
571 ntohs(local.in.sin_port),
572 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
573 ntohs(remote.in.sin_port)) < 0)
574 return -ENOMEM;
575
576 break;
577 }
578
579 case AF_INET6: {
580 static const char ipv4_prefix[] = {
581 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
582 };
583
584 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
585 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
586 const uint8_t
587 *a = local.in6.sin6_addr.s6_addr+12,
588 *b = remote.in6.sin6_addr.s6_addr+12;
589
590 if (asprintf(&r,
591 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
592 nr,
593 a[0], a[1], a[2], a[3],
594 ntohs(local.in6.sin6_port),
595 b[0], b[1], b[2], b[3],
596 ntohs(remote.in6.sin6_port)) < 0)
597 return -ENOMEM;
598 } else {
599 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
600
601 if (asprintf(&r,
602 "%u-%s:%u-%s:%u",
603 nr,
604 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
605 ntohs(local.in6.sin6_port),
606 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
607 ntohs(remote.in6.sin6_port)) < 0)
608 return -ENOMEM;
609 }
610
611 break;
612 }
613
614 case AF_UNIX: {
615 struct ucred ucred;
616
617 l = sizeof(ucred);
618 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
619 return -errno;
620
621 if (asprintf(&r,
622 "%u-%lu-%lu",
623 nr,
624 (unsigned long) ucred.pid,
625 (unsigned long) ucred.uid) < 0)
626 return -ENOMEM;
627
628 break;
629 }
630
631 default:
632 assert_not_reached("Unhandled socket type.");
633 }
634
635 *instance = r;
636 return 0;
637 }
638
639 static void socket_close_fds(Socket *s) {
640 SocketPort *p;
641
642 assert(s);
643
644 LIST_FOREACH(port, p, s->ports) {
645 if (p->fd < 0)
646 continue;
647
648 unit_unwatch_fd(UNIT(s), &p->fd_watch);
649 close_nointr_nofail(p->fd);
650
651 /* One little note: we should never delete any sockets
652 * in the file system here! After all some other
653 * process we spawned might still have a reference of
654 * this fd and wants to continue to use it. Therefore
655 * we delete sockets in the file system before we
656 * create a new one, not after we stopped using
657 * one! */
658
659 p->fd = -1;
660 }
661 }
662
663 static void socket_apply_socket_options(Socket *s, int fd) {
664 assert(s);
665 assert(fd >= 0);
666
667 if (s->keep_alive) {
668 int b = s->keep_alive;
669 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
670 log_warning("SO_KEEPALIVE failed: %m");
671 }
672
673 if (s->broadcast) {
674 int one = 1;
675 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
676 log_warning("SO_BROADCAST failed: %m");
677 }
678
679 if (s->pass_cred) {
680 int one = 1;
681 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
682 log_warning("SO_PASSCRED failed: %m");
683 }
684
685 if (s->pass_sec) {
686 int one = 1;
687 if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
688 log_warning("SO_PASSSEC failed: %m");
689 }
690
691 if (s->priority >= 0)
692 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
693 log_warning("SO_PRIORITY failed: %m");
694
695 if (s->receive_buffer > 0) {
696 int value = (int) s->receive_buffer;
697
698 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
699
700 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
701 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
702 log_warning("SO_RCVBUF failed: %m");
703 }
704
705 if (s->send_buffer > 0) {
706 int value = (int) s->send_buffer;
707 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
708 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
709 log_warning("SO_SNDBUF failed: %m");
710 }
711
712 if (s->mark >= 0)
713 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
714 log_warning("SO_MARK failed: %m");
715
716 if (s->ip_tos >= 0)
717 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
718 log_warning("IP_TOS failed: %m");
719
720 if (s->ip_ttl >= 0) {
721 int r, x;
722
723 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
724
725 if (socket_ipv6_is_supported())
726 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
727 else {
728 x = -1;
729 errno = EAFNOSUPPORT;
730 }
731
732 if (r < 0 && x < 0)
733 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
734 }
735
736 if (s->tcp_congestion)
737 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
738 log_warning("TCP_CONGESTION failed: %m");
739 }
740
741 static void socket_apply_fifo_options(Socket *s, int fd) {
742 assert(s);
743 assert(fd >= 0);
744
745 if (s->pipe_size > 0)
746 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
747 log_warning("F_SETPIPE_SZ: %m");
748 }
749
750 static int fifo_address_create(
751 const char *path,
752 mode_t directory_mode,
753 mode_t socket_mode,
754 int *_fd) {
755
756 int fd = -1, r = 0;
757 struct stat st;
758 mode_t old_mask;
759
760 assert(path);
761 assert(_fd);
762
763 mkdir_parents(path, directory_mode);
764
765 if ((r = label_fifofile_set(path)) < 0)
766 goto fail;
767
768 /* Enforce the right access mode for the fifo */
769 old_mask = umask(~ socket_mode);
770
771 /* Include the original umask in our mask */
772 umask(~socket_mode | old_mask);
773
774 r = mkfifo(path, socket_mode);
775 umask(old_mask);
776
777 if (r < 0 && errno != EEXIST) {
778 r = -errno;
779 goto fail;
780 }
781
782 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
783 r = -errno;
784 goto fail;
785 }
786
787 label_file_clear();
788
789 if (fstat(fd, &st) < 0) {
790 r = -errno;
791 goto fail;
792 }
793
794 if (!S_ISFIFO(st.st_mode) ||
795 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
796 st.st_uid != getuid() ||
797 st.st_gid != getgid()) {
798
799 r = -EEXIST;
800 goto fail;
801 }
802
803 *_fd = fd;
804 return 0;
805
806 fail:
807 label_file_clear();
808
809 if (fd >= 0)
810 close_nointr_nofail(fd);
811
812 return r;
813 }
814
815 static int special_address_create(
816 const char *path,
817 int *_fd) {
818
819 int fd = -1, r = 0;
820 struct stat st;
821
822 assert(path);
823 assert(_fd);
824
825 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
826 r = -errno;
827 goto fail;
828 }
829
830 if (fstat(fd, &st) < 0) {
831 r = -errno;
832 goto fail;
833 }
834
835 /* Check whether this is a /proc, /sys or /dev file or char device */
836 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
837 r = -EEXIST;
838 goto fail;
839 }
840
841 *_fd = fd;
842 return 0;
843
844 fail:
845 if (fd >= 0)
846 close_nointr_nofail(fd);
847
848 return r;
849 }
850
851 static int mq_address_create(
852 const char *path,
853 mode_t mq_mode,
854 long maxmsg,
855 long msgsize,
856 int *_fd) {
857
858 int fd = -1, r = 0;
859 struct stat st;
860 mode_t old_mask;
861 struct mq_attr _attr, *attr = NULL;
862
863 assert(path);
864 assert(_fd);
865
866 if (maxmsg > 0 && msgsize > 0) {
867 zero(_attr);
868 _attr.mq_flags = O_NONBLOCK;
869 _attr.mq_maxmsg = maxmsg;
870 _attr.mq_msgsize = msgsize;
871 attr = &_attr;
872 }
873
874 /* Enforce the right access mode for the mq */
875 old_mask = umask(~ mq_mode);
876
877 /* Include the original umask in our mask */
878 umask(~mq_mode | old_mask);
879
880 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
881 umask(old_mask);
882
883 if (fd < 0) {
884 r = -errno;
885 goto fail;
886 }
887
888 if (fstat(fd, &st) < 0) {
889 r = -errno;
890 goto fail;
891 }
892
893 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
894 st.st_uid != getuid() ||
895 st.st_gid != getgid()) {
896
897 r = -EEXIST;
898 goto fail;
899 }
900
901 *_fd = fd;
902 return 0;
903
904 fail:
905 if (fd >= 0)
906 close_nointr_nofail(fd);
907
908 return r;
909 }
910
911 static int socket_open_fds(Socket *s) {
912 SocketPort *p;
913 int r;
914 char *label = NULL;
915 bool know_label = false;
916
917 assert(s);
918
919 LIST_FOREACH(port, p, s->ports) {
920
921 if (p->fd >= 0)
922 continue;
923
924 if (p->type == SOCKET_SOCKET) {
925
926 if (!know_label) {
927
928 if ((r = socket_instantiate_service(s)) < 0)
929 return r;
930
931 if (UNIT_DEREF(s->service) &&
932 SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
933 r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
934
935 if (r < 0) {
936 if (r != -EPERM)
937 return r;
938 }
939 }
940
941 know_label = true;
942 }
943
944 if ((r = socket_address_listen(
945 &p->address,
946 s->backlog,
947 s->bind_ipv6_only,
948 s->bind_to_device,
949 s->free_bind,
950 s->transparent,
951 s->directory_mode,
952 s->socket_mode,
953 label,
954 &p->fd)) < 0)
955 goto rollback;
956
957 socket_apply_socket_options(s, p->fd);
958
959 } else if (p->type == SOCKET_SPECIAL) {
960
961 if ((r = special_address_create(
962 p->path,
963 &p->fd)) < 0)
964 goto rollback;
965
966 } else if (p->type == SOCKET_FIFO) {
967
968 if ((r = fifo_address_create(
969 p->path,
970 s->directory_mode,
971 s->socket_mode,
972 &p->fd)) < 0)
973 goto rollback;
974
975 socket_apply_fifo_options(s, p->fd);
976 } else if (p->type == SOCKET_MQUEUE) {
977
978 if ((r = mq_address_create(
979 p->path,
980 s->socket_mode,
981 s->mq_maxmsg,
982 s->mq_msgsize,
983 &p->fd)) < 0)
984 goto rollback;
985 } else
986 assert_not_reached("Unknown port type");
987 }
988
989 label_free(label);
990 return 0;
991
992 rollback:
993 socket_close_fds(s);
994 label_free(label);
995 return r;
996 }
997
998 static void socket_unwatch_fds(Socket *s) {
999 SocketPort *p;
1000
1001 assert(s);
1002
1003 LIST_FOREACH(port, p, s->ports) {
1004 if (p->fd < 0)
1005 continue;
1006
1007 unit_unwatch_fd(UNIT(s), &p->fd_watch);
1008 }
1009 }
1010
1011 static int socket_watch_fds(Socket *s) {
1012 SocketPort *p;
1013 int r;
1014
1015 assert(s);
1016
1017 LIST_FOREACH(port, p, s->ports) {
1018 if (p->fd < 0)
1019 continue;
1020
1021 p->fd_watch.socket_accept =
1022 s->accept &&
1023 p->type == SOCKET_SOCKET &&
1024 socket_address_can_accept(&p->address);
1025
1026 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
1027 goto fail;
1028 }
1029
1030 return 0;
1031
1032 fail:
1033 socket_unwatch_fds(s);
1034 return r;
1035 }
1036
1037 static void socket_set_state(Socket *s, SocketState state) {
1038 SocketState old_state;
1039 assert(s);
1040
1041 old_state = s->state;
1042 s->state = state;
1043
1044 if (state != SOCKET_START_PRE &&
1045 state != SOCKET_START_POST &&
1046 state != SOCKET_STOP_PRE &&
1047 state != SOCKET_STOP_PRE_SIGTERM &&
1048 state != SOCKET_STOP_PRE_SIGKILL &&
1049 state != SOCKET_STOP_POST &&
1050 state != SOCKET_FINAL_SIGTERM &&
1051 state != SOCKET_FINAL_SIGKILL) {
1052 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1053 socket_unwatch_control_pid(s);
1054 s->control_command = NULL;
1055 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1056 }
1057
1058 if (state != SOCKET_LISTENING)
1059 socket_unwatch_fds(s);
1060
1061 if (state != SOCKET_START_POST &&
1062 state != SOCKET_LISTENING &&
1063 state != SOCKET_RUNNING &&
1064 state != SOCKET_STOP_PRE &&
1065 state != SOCKET_STOP_PRE_SIGTERM &&
1066 state != SOCKET_STOP_PRE_SIGKILL)
1067 socket_close_fds(s);
1068
1069 if (state != old_state)
1070 log_debug("%s changed %s -> %s",
1071 UNIT(s)->id,
1072 socket_state_to_string(old_state),
1073 socket_state_to_string(state));
1074
1075 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1076 }
1077
1078 static int socket_coldplug(Unit *u) {
1079 Socket *s = SOCKET(u);
1080 int r;
1081
1082 assert(s);
1083 assert(s->state == SOCKET_DEAD);
1084
1085 if (s->deserialized_state != s->state) {
1086
1087 if (s->deserialized_state == SOCKET_START_PRE ||
1088 s->deserialized_state == SOCKET_START_POST ||
1089 s->deserialized_state == SOCKET_STOP_PRE ||
1090 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1091 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1092 s->deserialized_state == SOCKET_STOP_POST ||
1093 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1094 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1095
1096 if (s->control_pid <= 0)
1097 return -EBADMSG;
1098
1099 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1100 return r;
1101
1102 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1103 return r;
1104 }
1105
1106 if (s->deserialized_state == SOCKET_START_POST ||
1107 s->deserialized_state == SOCKET_LISTENING ||
1108 s->deserialized_state == SOCKET_RUNNING ||
1109 s->deserialized_state == SOCKET_STOP_PRE ||
1110 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1111 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1112 if ((r = socket_open_fds(s)) < 0)
1113 return r;
1114
1115 if (s->deserialized_state == SOCKET_LISTENING)
1116 if ((r = socket_watch_fds(s)) < 0)
1117 return r;
1118
1119 socket_set_state(s, s->deserialized_state);
1120 }
1121
1122 return 0;
1123 }
1124
1125 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1126 pid_t pid;
1127 int r;
1128 char **argv;
1129
1130 assert(s);
1131 assert(c);
1132 assert(_pid);
1133
1134 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1135 goto fail;
1136
1137 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1138 r = -ENOMEM;
1139 goto fail;
1140 }
1141
1142 r = exec_spawn(c,
1143 argv,
1144 &s->exec_context,
1145 NULL, 0,
1146 UNIT(s)->manager->environment,
1147 true,
1148 true,
1149 true,
1150 UNIT(s)->manager->confirm_spawn,
1151 UNIT(s)->cgroup_bondings,
1152 UNIT(s)->cgroup_attributes,
1153 &pid);
1154
1155 strv_free(argv);
1156 if (r < 0)
1157 goto fail;
1158
1159 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1160 /* FIXME: we need to do something here */
1161 goto fail;
1162
1163 *_pid = pid;
1164
1165 return 0;
1166
1167 fail:
1168 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1169
1170 return r;
1171 }
1172
1173 static void socket_enter_dead(Socket *s, SocketResult f) {
1174 assert(s);
1175
1176 if (f != SOCKET_SUCCESS)
1177 s->result = f;
1178
1179 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
1180 }
1181
1182 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
1183
1184 static void socket_enter_stop_post(Socket *s, SocketResult f) {
1185 int r;
1186 assert(s);
1187
1188 if (f != SOCKET_SUCCESS)
1189 s->result = f;
1190
1191 socket_unwatch_control_pid(s);
1192
1193 s->control_command_id = SOCKET_EXEC_STOP_POST;
1194
1195 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1196 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1197 goto fail;
1198
1199 socket_set_state(s, SOCKET_STOP_POST);
1200 } else
1201 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
1202
1203 return;
1204
1205 fail:
1206 log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1207 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1208 }
1209
1210 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
1211 int r;
1212 Set *pid_set = NULL;
1213 bool wait_for_exit = false;
1214
1215 assert(s);
1216
1217 if (f != SOCKET_SUCCESS)
1218 s->result = f;
1219
1220 if (s->exec_context.kill_mode != KILL_NONE) {
1221 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1222
1223 if (s->control_pid > 0) {
1224 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1225
1226 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1227 else
1228 wait_for_exit = true;
1229 }
1230
1231 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1232
1233 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1234 r = -ENOMEM;
1235 goto fail;
1236 }
1237
1238 /* Exclude the control pid from being killed via the cgroup */
1239 if (s->control_pid > 0)
1240 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1241 goto fail;
1242
1243 if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1244 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1245 log_warning("Failed to kill control group: %s", strerror(-r));
1246 } else if (r > 0)
1247 wait_for_exit = true;
1248
1249 set_free(pid_set);
1250 pid_set = NULL;
1251 }
1252 }
1253
1254 if (wait_for_exit) {
1255 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1256 goto fail;
1257
1258 socket_set_state(s, state);
1259 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1260 socket_enter_stop_post(s, SOCKET_SUCCESS);
1261 else
1262 socket_enter_dead(s, SOCKET_SUCCESS);
1263
1264 return;
1265
1266 fail:
1267 log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1268
1269 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1270 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1271 else
1272 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1273
1274 if (pid_set)
1275 set_free(pid_set);
1276 }
1277
1278 static void socket_enter_stop_pre(Socket *s, SocketResult f) {
1279 int r;
1280 assert(s);
1281
1282 if (f != SOCKET_SUCCESS)
1283 s->result = f;
1284
1285 socket_unwatch_control_pid(s);
1286
1287 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1288
1289 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1290 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1291 goto fail;
1292
1293 socket_set_state(s, SOCKET_STOP_PRE);
1294 } else
1295 socket_enter_stop_post(s, SOCKET_SUCCESS);
1296
1297 return;
1298
1299 fail:
1300 log_warning("%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r));
1301 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1302 }
1303
1304 static void socket_enter_listening(Socket *s) {
1305 int r;
1306 assert(s);
1307
1308 r = socket_watch_fds(s);
1309 if (r < 0) {
1310 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1311 goto fail;
1312 }
1313
1314 socket_set_state(s, SOCKET_LISTENING);
1315 return;
1316
1317 fail:
1318 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1319 }
1320
1321 static void socket_enter_start_post(Socket *s) {
1322 int r;
1323 assert(s);
1324
1325 r = socket_open_fds(s);
1326 if (r < 0) {
1327 log_warning("%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
1328 goto fail;
1329 }
1330
1331 socket_unwatch_control_pid(s);
1332
1333 s->control_command_id = SOCKET_EXEC_START_POST;
1334
1335 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1336 r = socket_spawn(s, s->control_command, &s->control_pid);
1337 if (r < 0) {
1338 log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
1339 goto fail;
1340 }
1341
1342 socket_set_state(s, SOCKET_START_POST);
1343 } else
1344 socket_enter_listening(s);
1345
1346 return;
1347
1348 fail:
1349 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1350 }
1351
1352 static void socket_enter_start_pre(Socket *s) {
1353 int r;
1354 assert(s);
1355
1356 socket_unwatch_control_pid(s);
1357
1358 s->control_command_id = SOCKET_EXEC_START_PRE;
1359
1360 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1361 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1362 goto fail;
1363
1364 socket_set_state(s, SOCKET_START_PRE);
1365 } else
1366 socket_enter_start_post(s);
1367
1368 return;
1369
1370 fail:
1371 log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
1372 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1373 }
1374
1375 static void socket_enter_running(Socket *s, int cfd) {
1376 int r;
1377 DBusError error;
1378
1379 assert(s);
1380 dbus_error_init(&error);
1381
1382 /* We don't take connections anymore if we are supposed to
1383 * shut down anyway */
1384 if (unit_pending_inactive(UNIT(s))) {
1385 log_debug("Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id);
1386
1387 if (cfd >= 0)
1388 close_nointr_nofail(cfd);
1389 else {
1390 /* Flush all sockets by closing and reopening them */
1391 socket_close_fds(s);
1392
1393 r = socket_watch_fds(s);
1394 if (r < 0) {
1395 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1396 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1397 }
1398 }
1399
1400 return;
1401 }
1402
1403 if (cfd < 0) {
1404 Iterator i;
1405 Unit *u;
1406 bool pending = false;
1407
1408 /* If there's already a start pending don't bother to
1409 * do anything */
1410 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
1411 if (unit_pending_active(u)) {
1412 pending = true;
1413 break;
1414 }
1415
1416 if (!pending) {
1417 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1418 if (r < 0)
1419 goto fail;
1420 }
1421
1422 socket_set_state(s, SOCKET_RUNNING);
1423 } else {
1424 char *prefix, *instance = NULL, *name;
1425 Service *service;
1426
1427 if (s->n_connections >= s->max_connections) {
1428 log_warning("Too many incoming connections (%u)", s->n_connections);
1429 close_nointr_nofail(cfd);
1430 return;
1431 }
1432
1433 r = socket_instantiate_service(s);
1434 if (r < 0)
1435 goto fail;
1436
1437 r = instance_from_socket(cfd, s->n_accepted, &instance);
1438 if (r < 0) {
1439 if (r != -ENOTCONN)
1440 goto fail;
1441
1442 /* ENOTCONN is legitimate if TCP RST was received.
1443 * This connection is over, but the socket unit lives on. */
1444 close_nointr_nofail(cfd);
1445 return;
1446 }
1447
1448 prefix = unit_name_to_prefix(UNIT(s)->id);
1449 if (!prefix) {
1450 free(instance);
1451 r = -ENOMEM;
1452 goto fail;
1453 }
1454
1455 name = unit_name_build(prefix, instance, ".service");
1456 free(prefix);
1457 free(instance);
1458
1459 if (!name) {
1460 r = -ENOMEM;
1461 goto fail;
1462 }
1463
1464 r = unit_add_name(UNIT_DEREF(s->service), name);
1465 if (r < 0) {
1466 free(name);
1467 goto fail;
1468 }
1469
1470 service = SERVICE(UNIT_DEREF(s->service));
1471 unit_ref_unset(&s->service);
1472 s->n_accepted ++;
1473
1474 UNIT(service)->no_gc = false;
1475
1476 unit_choose_id(UNIT(service), name);
1477 free(name);
1478
1479 r = service_set_socket_fd(service, cfd, s);
1480 if (r < 0)
1481 goto fail;
1482
1483 cfd = -1;
1484 s->n_connections ++;
1485
1486 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1487 if (r < 0)
1488 goto fail;
1489
1490 /* Notify clients about changed counters */
1491 unit_add_to_dbus_queue(UNIT(s));
1492 }
1493
1494 return;
1495
1496 fail:
1497 log_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r));
1498 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1499
1500 if (cfd >= 0)
1501 close_nointr_nofail(cfd);
1502
1503 dbus_error_free(&error);
1504 }
1505
1506 static void socket_run_next(Socket *s) {
1507 int r;
1508
1509 assert(s);
1510 assert(s->control_command);
1511 assert(s->control_command->command_next);
1512
1513 socket_unwatch_control_pid(s);
1514
1515 s->control_command = s->control_command->command_next;
1516
1517 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1518 goto fail;
1519
1520 return;
1521
1522 fail:
1523 log_warning("%s failed to run next task: %s", UNIT(s)->id, strerror(-r));
1524
1525 if (s->state == SOCKET_START_POST)
1526 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1527 else if (s->state == SOCKET_STOP_POST)
1528 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1529 else
1530 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1531 }
1532
1533 static int socket_start(Unit *u) {
1534 Socket *s = SOCKET(u);
1535
1536 assert(s);
1537
1538 /* We cannot fulfill this request right now, try again later
1539 * please! */
1540 if (s->state == SOCKET_STOP_PRE ||
1541 s->state == SOCKET_STOP_PRE_SIGKILL ||
1542 s->state == SOCKET_STOP_PRE_SIGTERM ||
1543 s->state == SOCKET_STOP_POST ||
1544 s->state == SOCKET_FINAL_SIGTERM ||
1545 s->state == SOCKET_FINAL_SIGKILL)
1546 return -EAGAIN;
1547
1548 if (s->state == SOCKET_START_PRE ||
1549 s->state == SOCKET_START_POST)
1550 return 0;
1551
1552 /* Cannot run this without the service being around */
1553 if (UNIT_DEREF(s->service)) {
1554 Service *service;
1555
1556 service = SERVICE(UNIT_DEREF(s->service));
1557
1558 if (UNIT(service)->load_state != UNIT_LOADED) {
1559 log_error("Socket service %s not loaded, refusing.", UNIT(service)->id);
1560 return -ENOENT;
1561 }
1562
1563 /* If the service is already active we cannot start the
1564 * socket */
1565 if (service->state != SERVICE_DEAD &&
1566 service->state != SERVICE_FAILED &&
1567 service->state != SERVICE_AUTO_RESTART) {
1568 log_error("Socket service %s already active, refusing.", UNIT(service)->id);
1569 return -EBUSY;
1570 }
1571
1572 #ifdef HAVE_SYSV_COMPAT
1573 if (service->sysv_path) {
1574 log_error("Using SysV services for socket activation is not supported. Refusing.");
1575 return -ENOENT;
1576 }
1577 #endif
1578 }
1579
1580 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1581
1582 s->result = SOCKET_SUCCESS;
1583 socket_enter_start_pre(s);
1584 return 0;
1585 }
1586
1587 static int socket_stop(Unit *u) {
1588 Socket *s = SOCKET(u);
1589
1590 assert(s);
1591
1592 /* Already on it */
1593 if (s->state == SOCKET_STOP_PRE ||
1594 s->state == SOCKET_STOP_PRE_SIGTERM ||
1595 s->state == SOCKET_STOP_PRE_SIGKILL ||
1596 s->state == SOCKET_STOP_POST ||
1597 s->state == SOCKET_FINAL_SIGTERM ||
1598 s->state == SOCKET_FINAL_SIGKILL)
1599 return 0;
1600
1601 /* If there's already something running we go directly into
1602 * kill mode. */
1603 if (s->state == SOCKET_START_PRE ||
1604 s->state == SOCKET_START_POST) {
1605 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
1606 return -EAGAIN;
1607 }
1608
1609 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1610
1611 socket_enter_stop_pre(s, SOCKET_SUCCESS);
1612 return 0;
1613 }
1614
1615 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1616 Socket *s = SOCKET(u);
1617 SocketPort *p;
1618 int r;
1619
1620 assert(u);
1621 assert(f);
1622 assert(fds);
1623
1624 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1625 unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
1626 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1627
1628 if (s->control_pid > 0)
1629 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1630
1631 if (s->control_command_id >= 0)
1632 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1633
1634 LIST_FOREACH(port, p, s->ports) {
1635 int copy;
1636
1637 if (p->fd < 0)
1638 continue;
1639
1640 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1641 return copy;
1642
1643 if (p->type == SOCKET_SOCKET) {
1644 char *t;
1645
1646 if ((r = socket_address_print(&p->address, &t)) < 0)
1647 return r;
1648
1649 if (socket_address_family(&p->address) == AF_NETLINK)
1650 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1651 else
1652 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1653 free(t);
1654 } else if (p->type == SOCKET_SPECIAL)
1655 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1656 else {
1657 assert(p->type == SOCKET_FIFO);
1658 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1659 }
1660 }
1661
1662 return 0;
1663 }
1664
1665 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1666 Socket *s = SOCKET(u);
1667
1668 assert(u);
1669 assert(key);
1670 assert(value);
1671 assert(fds);
1672
1673 if (streq(key, "state")) {
1674 SocketState state;
1675
1676 if ((state = socket_state_from_string(value)) < 0)
1677 log_debug("Failed to parse state value %s", value);
1678 else
1679 s->deserialized_state = state;
1680 } else if (streq(key, "result")) {
1681 SocketResult f;
1682
1683 f = socket_result_from_string(value);
1684 if (f < 0)
1685 log_debug("Failed to parse result value %s", value);
1686 else if (f != SOCKET_SUCCESS)
1687 s->result = f;
1688
1689 } else if (streq(key, "n-accepted")) {
1690 unsigned k;
1691
1692 if (safe_atou(value, &k) < 0)
1693 log_debug("Failed to parse n-accepted value %s", value);
1694 else
1695 s->n_accepted += k;
1696 } else if (streq(key, "control-pid")) {
1697 pid_t pid;
1698
1699 if (parse_pid(value, &pid) < 0)
1700 log_debug("Failed to parse control-pid value %s", value);
1701 else
1702 s->control_pid = pid;
1703 } else if (streq(key, "control-command")) {
1704 SocketExecCommand id;
1705
1706 if ((id = socket_exec_command_from_string(value)) < 0)
1707 log_debug("Failed to parse exec-command value %s", value);
1708 else {
1709 s->control_command_id = id;
1710 s->control_command = s->exec_command[id];
1711 }
1712 } else if (streq(key, "fifo")) {
1713 int fd, skip = 0;
1714 SocketPort *p;
1715
1716 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1717 log_debug("Failed to parse fifo value %s", value);
1718 else {
1719
1720 LIST_FOREACH(port, p, s->ports)
1721 if (p->type == SOCKET_FIFO &&
1722 streq_ptr(p->path, value+skip))
1723 break;
1724
1725 if (p) {
1726 if (p->fd >= 0)
1727 close_nointr_nofail(p->fd);
1728 p->fd = fdset_remove(fds, fd);
1729 }
1730 }
1731
1732 } else if (streq(key, "special")) {
1733 int fd, skip = 0;
1734 SocketPort *p;
1735
1736 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1737 log_debug("Failed to parse special value %s", value);
1738 else {
1739
1740 LIST_FOREACH(port, p, s->ports)
1741 if (p->type == SOCKET_SPECIAL &&
1742 streq_ptr(p->path, value+skip))
1743 break;
1744
1745 if (p) {
1746 if (p->fd >= 0)
1747 close_nointr_nofail(p->fd);
1748 p->fd = fdset_remove(fds, fd);
1749 }
1750 }
1751
1752 } else if (streq(key, "socket")) {
1753 int fd, type, skip = 0;
1754 SocketPort *p;
1755
1756 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1757 log_debug("Failed to parse socket value %s", value);
1758 else {
1759
1760 LIST_FOREACH(port, p, s->ports)
1761 if (socket_address_is(&p->address, value+skip, type))
1762 break;
1763
1764 if (p) {
1765 if (p->fd >= 0)
1766 close_nointr_nofail(p->fd);
1767 p->fd = fdset_remove(fds, fd);
1768 }
1769 }
1770
1771 } else if (streq(key, "netlink")) {
1772 int fd, skip = 0;
1773 SocketPort *p;
1774
1775 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1776 log_debug("Failed to parse socket value %s", value);
1777 else {
1778
1779 LIST_FOREACH(port, p, s->ports)
1780 if (socket_address_is_netlink(&p->address, value+skip))
1781 break;
1782
1783 if (p) {
1784 if (p->fd >= 0)
1785 close_nointr_nofail(p->fd);
1786 p->fd = fdset_remove(fds, fd);
1787 }
1788 }
1789
1790 } else
1791 log_debug("Unknown serialization key '%s'", key);
1792
1793 return 0;
1794 }
1795
1796 static UnitActiveState socket_active_state(Unit *u) {
1797 assert(u);
1798
1799 return state_translation_table[SOCKET(u)->state];
1800 }
1801
1802 static const char *socket_sub_state_to_string(Unit *u) {
1803 assert(u);
1804
1805 return socket_state_to_string(SOCKET(u)->state);
1806 }
1807
1808 static bool socket_check_gc(Unit *u) {
1809 Socket *s = SOCKET(u);
1810
1811 assert(u);
1812
1813 return s->n_connections > 0;
1814 }
1815
1816 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1817 Socket *s = SOCKET(u);
1818 int cfd = -1;
1819
1820 assert(s);
1821 assert(fd >= 0);
1822
1823 if (s->state != SOCKET_LISTENING)
1824 return;
1825
1826 log_debug("Incoming traffic on %s", u->id);
1827
1828 if (events != EPOLLIN) {
1829
1830 if (events & EPOLLHUP)
1831 log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->id);
1832 else
1833 log_error("%s: Got unexpected poll event (0x%x) on socket.", u->id, events);
1834
1835 goto fail;
1836 }
1837
1838 if (w->socket_accept) {
1839 for (;;) {
1840
1841 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1842
1843 if (errno == EINTR)
1844 continue;
1845
1846 log_error("Failed to accept socket: %m");
1847 goto fail;
1848 }
1849
1850 break;
1851 }
1852
1853 socket_apply_socket_options(s, cfd);
1854 }
1855
1856 socket_enter_running(s, cfd);
1857 return;
1858
1859 fail:
1860 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1861 }
1862
1863 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1864 Socket *s = SOCKET(u);
1865 SocketResult f;
1866
1867 assert(s);
1868 assert(pid >= 0);
1869
1870 if (pid != s->control_pid)
1871 return;
1872
1873 s->control_pid = 0;
1874
1875 if (is_clean_exit(code, status))
1876 f = SOCKET_SUCCESS;
1877 else if (code == CLD_EXITED)
1878 f = SOCKET_FAILURE_EXIT_CODE;
1879 else if (code == CLD_KILLED)
1880 f = SOCKET_FAILURE_SIGNAL;
1881 else if (code == CLD_DUMPED)
1882 f = SOCKET_FAILURE_CORE_DUMP;
1883 else
1884 assert_not_reached("Unknown code");
1885
1886 if (s->control_command) {
1887 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1888
1889 if (s->control_command->ignore)
1890 f = SOCKET_SUCCESS;
1891 }
1892
1893 log_full(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
1894 "%s control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
1895
1896 if (f != SOCKET_SUCCESS)
1897 s->result = f;
1898
1899 if (s->control_command &&
1900 s->control_command->command_next &&
1901 f == SOCKET_SUCCESS) {
1902
1903 log_debug("%s running next command for state %s", u->id, socket_state_to_string(s->state));
1904 socket_run_next(s);
1905 } else {
1906 s->control_command = NULL;
1907 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1908
1909 /* No further commands for this step, so let's figure
1910 * out what to do next */
1911
1912 log_debug("%s got final SIGCHLD for state %s", u->id, socket_state_to_string(s->state));
1913
1914 switch (s->state) {
1915
1916 case SOCKET_START_PRE:
1917 if (f == SOCKET_SUCCESS)
1918 socket_enter_start_post(s);
1919 else
1920 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
1921 break;
1922
1923 case SOCKET_START_POST:
1924 if (f == SOCKET_SUCCESS)
1925 socket_enter_listening(s);
1926 else
1927 socket_enter_stop_pre(s, f);
1928 break;
1929
1930 case SOCKET_STOP_PRE:
1931 case SOCKET_STOP_PRE_SIGTERM:
1932 case SOCKET_STOP_PRE_SIGKILL:
1933 socket_enter_stop_post(s, f);
1934 break;
1935
1936 case SOCKET_STOP_POST:
1937 case SOCKET_FINAL_SIGTERM:
1938 case SOCKET_FINAL_SIGKILL:
1939 socket_enter_dead(s, f);
1940 break;
1941
1942 default:
1943 assert_not_reached("Uh, control process died at wrong time.");
1944 }
1945 }
1946
1947 /* Notify clients about changed exit status */
1948 unit_add_to_dbus_queue(u);
1949 }
1950
1951 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1952 Socket *s = SOCKET(u);
1953
1954 assert(s);
1955 assert(elapsed == 1);
1956 assert(w == &s->timer_watch);
1957
1958 switch (s->state) {
1959
1960 case SOCKET_START_PRE:
1961 log_warning("%s starting timed out. Terminating.", u->id);
1962 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1963 break;
1964
1965 case SOCKET_START_POST:
1966 log_warning("%s starting timed out. Stopping.", u->id);
1967 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
1968 break;
1969
1970 case SOCKET_STOP_PRE:
1971 log_warning("%s stopping timed out. Terminating.", u->id);
1972 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1973 break;
1974
1975 case SOCKET_STOP_PRE_SIGTERM:
1976 if (s->exec_context.send_sigkill) {
1977 log_warning("%s stopping timed out. Killing.", u->id);
1978 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1979 } else {
1980 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->id);
1981 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1982 }
1983 break;
1984
1985 case SOCKET_STOP_PRE_SIGKILL:
1986 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
1987 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1988 break;
1989
1990 case SOCKET_STOP_POST:
1991 log_warning("%s stopping timed out (2). Terminating.", u->id);
1992 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1993 break;
1994
1995 case SOCKET_FINAL_SIGTERM:
1996 if (s->exec_context.send_sigkill) {
1997 log_warning("%s stopping timed out (2). Killing.", u->id);
1998 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1999 } else {
2000 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->id);
2001 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2002 }
2003 break;
2004
2005 case SOCKET_FINAL_SIGKILL:
2006 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
2007 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2008 break;
2009
2010 default:
2011 assert_not_reached("Timeout at wrong time.");
2012 }
2013 }
2014
2015 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2016 int *rfds;
2017 unsigned rn_fds, k;
2018 SocketPort *p;
2019
2020 assert(s);
2021 assert(fds);
2022 assert(n_fds);
2023
2024 /* Called from the service code for requesting our fds */
2025
2026 rn_fds = 0;
2027 LIST_FOREACH(port, p, s->ports)
2028 if (p->fd >= 0)
2029 rn_fds++;
2030
2031 if (rn_fds <= 0) {
2032 *fds = NULL;
2033 *n_fds = 0;
2034 return 0;
2035 }
2036
2037 if (!(rfds = new(int, rn_fds)))
2038 return -ENOMEM;
2039
2040 k = 0;
2041 LIST_FOREACH(port, p, s->ports)
2042 if (p->fd >= 0)
2043 rfds[k++] = p->fd;
2044
2045 assert(k == rn_fds);
2046
2047 *fds = rfds;
2048 *n_fds = rn_fds;
2049
2050 return 0;
2051 }
2052
2053 void socket_notify_service_dead(Socket *s, bool failed_permanent) {
2054 assert(s);
2055
2056 /* The service is dead. Dang!
2057 *
2058 * This is strictly for one-instance-for-all-connections
2059 * services. */
2060
2061 if (s->state == SOCKET_RUNNING) {
2062 log_debug("%s got notified about service death (failed permanently: %s)", UNIT(s)->id, yes_no(failed_permanent));
2063 if (failed_permanent)
2064 socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT);
2065 else
2066 socket_enter_listening(s);
2067 }
2068 }
2069
2070 void socket_connection_unref(Socket *s) {
2071 assert(s);
2072
2073 /* The service is dead. Yay!
2074 *
2075 * This is strictly for one-instance-per-connection
2076 * services. */
2077
2078 assert(s->n_connections > 0);
2079 s->n_connections--;
2080
2081 log_debug("%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
2082 }
2083
2084 static void socket_reset_failed(Unit *u) {
2085 Socket *s = SOCKET(u);
2086
2087 assert(s);
2088
2089 if (s->state == SOCKET_FAILED)
2090 socket_set_state(s, SOCKET_DEAD);
2091
2092 s->result = SOCKET_SUCCESS;
2093 }
2094
2095 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2096 Socket *s = SOCKET(u);
2097 int r = 0;
2098 Set *pid_set = NULL;
2099
2100 assert(s);
2101
2102 if (who == KILL_MAIN) {
2103 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2104 return -ESRCH;
2105 }
2106
2107 if (s->control_pid <= 0 && who == KILL_CONTROL) {
2108 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2109 return -ESRCH;
2110 }
2111
2112 if (who == KILL_CONTROL || who == KILL_ALL)
2113 if (s->control_pid > 0)
2114 if (kill(s->control_pid, signo) < 0)
2115 r = -errno;
2116
2117 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
2118 int q;
2119
2120 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2121 return -ENOMEM;
2122
2123 /* Exclude the control pid from being killed via the cgroup */
2124 if (s->control_pid > 0)
2125 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2126 r = q;
2127 goto finish;
2128 }
2129
2130 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
2131 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
2132 r = q;
2133 }
2134
2135 finish:
2136 if (pid_set)
2137 set_free(pid_set);
2138
2139 return r;
2140 }
2141
2142 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2143 [SOCKET_DEAD] = "dead",
2144 [SOCKET_START_PRE] = "start-pre",
2145 [SOCKET_START_POST] = "start-post",
2146 [SOCKET_LISTENING] = "listening",
2147 [SOCKET_RUNNING] = "running",
2148 [SOCKET_STOP_PRE] = "stop-pre",
2149 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2150 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2151 [SOCKET_STOP_POST] = "stop-post",
2152 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2153 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2154 [SOCKET_FAILED] = "failed"
2155 };
2156
2157 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2158
2159 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2160 [SOCKET_EXEC_START_PRE] = "StartPre",
2161 [SOCKET_EXEC_START_POST] = "StartPost",
2162 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2163 [SOCKET_EXEC_STOP_POST] = "StopPost"
2164 };
2165
2166 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2167
2168 static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2169 [SOCKET_SUCCESS] = "success",
2170 [SOCKET_FAILURE_RESOURCES] = "resources",
2171 [SOCKET_FAILURE_TIMEOUT] = "timeout",
2172 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2173 [SOCKET_FAILURE_SIGNAL] = "signal",
2174 [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
2175 [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent"
2176 };
2177
2178 DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2179
2180 const UnitVTable socket_vtable = {
2181 .suffix = ".socket",
2182 .object_size = sizeof(Socket),
2183 .sections =
2184 "Unit\0"
2185 "Socket\0"
2186 "Install\0",
2187
2188 .init = socket_init,
2189 .done = socket_done,
2190 .load = socket_load,
2191
2192 .kill = socket_kill,
2193
2194 .coldplug = socket_coldplug,
2195
2196 .dump = socket_dump,
2197
2198 .start = socket_start,
2199 .stop = socket_stop,
2200
2201 .serialize = socket_serialize,
2202 .deserialize_item = socket_deserialize_item,
2203
2204 .active_state = socket_active_state,
2205 .sub_state_to_string = socket_sub_state_to_string,
2206
2207 .check_gc = socket_check_gc,
2208
2209 .fd_event = socket_fd_event,
2210 .sigchld_event = socket_sigchld_event,
2211 .timer_event = socket_timer_event,
2212
2213 .reset_failed = socket_reset_failed,
2214
2215 .bus_interface = "org.freedesktop.systemd1.Socket",
2216 .bus_message_handler = bus_socket_message_handler,
2217 .bus_invalidating_properties = bus_socket_invalidating_properties
2218 };
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