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d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
5cb5a6ff 2
a7334b09
LP		 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
83c60c9f
LP		 22#include <sys/types.h>
23#include <sys/stat.h>
24#include <unistd.h>
25#include <errno.h>
26#include <fcntl.h>
f94ea366 27#include <sys/epoll.h>
034c6ed7 28#include <signal.h>
4f2d528d 29#include <arpa/inet.h>
83c60c9f 30
87f0e418 31#include "unit.h"
5cb5a6ff 32#include "socket.h"
cebf8b20 33#include "netinet/tcp.h"
83c60c9f 34#include "log.h"
23a177ef
LP		 35#include "load-dropin.h"
36#include "load-fragment.h"
9e2f7c11 37#include "strv.h"
4f2d528d 38#include "unit-name.h"
4139c1b2 39#include "dbus-socket.h"
4fd5948e 40#include "missing.h"
a40eb732 41#include "special.h"
398ef8ba 42#include "bus-errors.h"
e51bc1a2 43#include "label.h"
83c60c9f 44
acbb0225 45static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
87f0e418
LP		 46 [SOCKET_DEAD] = UNIT_INACTIVE,
47 [SOCKET_START_PRE] = UNIT_ACTIVATING,
48 [SOCKET_START_POST] = UNIT_ACTIVATING,
49 [SOCKET_LISTENING] = UNIT_ACTIVE,
50 [SOCKET_RUNNING] = UNIT_ACTIVE,
51 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
52 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
53 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
54 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
80876c20
LP		 55 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
56 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 57 [SOCKET_FAILED] = UNIT_FAILED
83c60c9f 58};
5cb5a6ff 59
a16e1123
LP		 60static void socket_init(Unit *u) {
61 Socket *s = SOCKET(u);
62
63 assert(u);
64 assert(u->meta.load_state == UNIT_STUB);
65
a16e1123
LP		 66 s->backlog = SOMAXCONN;
67 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
68 s->directory_mode = 0755;
69 s->socket_mode = 0666;
70
6cf6bbc2
LP		 71 s->max_connections = 64;
72
4fd5948e 73 s->priority = -1;
4fd5948e
LP		 74 s->ip_tos = -1;
75 s->ip_ttl = -1;
4fd5948e 76 s->mark = -1;
4fd5948e 77
a16e1123
LP		 78 exec_context_init(&s->exec_context);
79
80 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
81}
acbb0225 82
5e94833f
LP		 83static void socket_unwatch_control_pid(Socket *s) {
84 assert(s);
85
86 if (s->control_pid <= 0)
87 return;
88
89 unit_unwatch_pid(UNIT(s), s->control_pid);
90 s->control_pid = 0;
91}
92
87f0e418
LP		 93static void socket_done(Unit *u) {
94 Socket *s = SOCKET(u);
034c6ed7 95 SocketPort *p;
6cf6bbc2 96 Meta *i;
034c6ed7
LP		 97
98 assert(s);
99
100 while ((p = s->ports)) {
101 LIST_REMOVE(SocketPort, port, s->ports, p);
102
a16e1123
LP		 103 if (p->fd >= 0) {
104 unit_unwatch_fd(UNIT(s), &p->fd_watch);
105 close_nointr_nofail(p->fd);
106 }
107
034c6ed7
LP		 108 free(p->path);
109 free(p);
110 }
111
112 exec_context_done(&s->exec_context);
e537352b 113 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 114 s->control_command = NULL;
115
5e94833f 116 socket_unwatch_control_pid(s);
034c6ed7
LP		 117
118 s->service = NULL;
119
cebf8b20
TT		 120 free(s->tcp_congestion);
121 s->tcp_congestion = NULL;
122
acbb0225 123 free(s->bind_to_device);
e537352b 124 s->bind_to_device = NULL;
acbb0225
LP		 125
126 unit_unwatch_timer(u, &s->timer_watch);
6cf6bbc2
LP		 127
128 /* Make sure no service instance refers to us anymore. */
129 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
130 Service *service = (Service *) i;
131
132 if (service->socket == s)
133 service->socket = NULL;
134 }
5cb5a6ff
LP		 135}
136
b15bdda8
LP		 137static int socket_instantiate_service(Socket *s) {
138 char *prefix, *name;
139 int r;
140 Unit *u;
141
142 assert(s);
143
144 /* This fills in s->service if it isn't filled in yet. For
145 * Accept=yes sockets we create the next connection service
146 * here. For Accept=no this is mostly a NOP since the service
147 * is figured out at load time anyway. */
148
149 if (s->service)
150 return 0;
151
152 assert(s->accept);
153
154 if (!(prefix = unit_name_to_prefix(s->meta.id)))
155 return -ENOMEM;
156
157 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
158 free(prefix);
159
160 if (r < 0)
161 return -ENOMEM;
162
163 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
164 free(name);
165
166 if (r < 0)
167 return r;
168
6c073082 169 u->meta.no_gc = true;
b15bdda8
LP		 170 s->service = SERVICE(u);
171 return 0;
172}
173
4f2d528d
LP		 174static bool have_non_accept_socket(Socket *s) {
175 SocketPort *p;
176
177 assert(s);
178
179 if (!s->accept)
180 return true;
181
dd5ad9d4
LP		 182 LIST_FOREACH(port, p, s->ports) {
183
184 if (p->type != SOCKET_SOCKET)
185 return true;
186
4f2d528d
LP		 187 if (!socket_address_can_accept(&p->address))
188 return true;
dd5ad9d4 189 }
4f2d528d
LP		 190
191 return false;
192}
193
194static int socket_verify(Socket *s) {
195 assert(s);
196
4cd1fbcc 197 if (s->meta.load_state != UNIT_LOADED)
4f2d528d
LP		 198 return 0;
199
200 if (!s->ports) {
4cd1fbcc 201 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
4f2d528d
LP		 202 return -EINVAL;
203 }
204
0009d2a6
LP		 205 if (s->accept && have_non_accept_socket(s)) {
206 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
207 return -EINVAL;
208 }
209
6cf6bbc2 210 if (s->accept && s->max_connections <= 0) {
4d0e5dbd
LP		 211 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
212 return -EINVAL;
213 }
214
2e22afe9 215 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd 216 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
6cf6bbc2
LP		 217 return -EINVAL;
218 }
219
4f2d528d
LP		 220 return 0;
221}
222
6e2ef85b
LP		 223static bool socket_needs_mount(Socket *s, const char *prefix) {
224 SocketPort *p;
225
226 assert(s);
227
228 LIST_FOREACH(port, p, s->ports) {
229
230 if (p->type == SOCKET_SOCKET) {
231 if (socket_address_needs_mount(&p->address, prefix))
232 return true;
233 } else {
234 assert(p->type == SOCKET_FIFO);
235 if (path_startswith(p->path, prefix))
236 return true;
237 }
238 }
239
240 return false;
241}
242
243int socket_add_one_mount_link(Socket *s, Mount *m) {
244 int r;
245
246 assert(s);
247 assert(m);
248
249 if (s->meta.load_state != UNIT_LOADED ||
250 m->meta.load_state != UNIT_LOADED)
251 return 0;
252
253 if (!socket_needs_mount(s, m->where))
254 return 0;
255
2c966c03 256 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
6e2ef85b
LP		 257 return r;
258
259 return 0;
260}
261
262static int socket_add_mount_links(Socket *s) {
263 Meta *other;
264 int r;
265
266 assert(s);
267
268 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
269 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
270 return r;
271
272 return 0;
273}
274
275static int socket_add_device_link(Socket *s) {
276 char *t;
277 int r;
278
279 assert(s);
280
281 if (!s->bind_to_device)
282 return 0;
283
284 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
285 return -ENOMEM;
286
287 r = unit_add_node_link(UNIT(s), t, false);
288 free(t);
289
290 return r;
291}
292
a40eb732
LP		 293static int socket_add_default_dependencies(Socket *s) {
294 int r;
295 assert(s);
296
297 if (s->meta.manager->running_as == MANAGER_SYSTEM)
298 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
299 return r;
300
69dd2852 301 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
a40eb732
LP		 302}
303
e537352b
LP		 304static int socket_load(Unit *u) {
305 Socket *s = SOCKET(u);
306 int r;
44d8db9e 307
e537352b
LP		 308 assert(u);
309 assert(u->meta.load_state == UNIT_STUB);
44d8db9e 310
e537352b 311 if ((r = unit_load_fragment_and_dropin(u)) < 0)
23a177ef 312 return r;
44d8db9e 313
23a177ef 314 /* This is a new unit? Then let's add in some extras */
e537352b 315 if (u->meta.load_state == UNIT_LOADED) {
44d8db9e 316
4f2d528d 317 if (have_non_accept_socket(s)) {
25366e09 318 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)) < 0)
4f2d528d 319 return r;
23a177ef 320
701cc384 321 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
4f2d528d
LP		 322 return r;
323 }
44d8db9e 324
6e2ef85b
LP		 325 if ((r = socket_add_mount_links(s)) < 0)
326 return r;
327
328 if ((r = socket_add_device_link(s)) < 0)
329 return r;
330
23a177ef
LP		 331 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
332 return r;
333
334 if ((r = unit_add_default_cgroup(u)) < 0)
335 return r;
a40eb732
LP		 336
337 if (s->meta.default_dependencies)
338 if ((r = socket_add_default_dependencies(s)) < 0)
339 return r;
23a177ef
LP		 340 }
341
4f2d528d 342 return socket_verify(s);
44d8db9e
LP		 343}
344
542563ba
LP		 345static const char* listen_lookup(int type) {
346
347 if (type == SOCK_STREAM)
348 return "ListenStream";
349 else if (type == SOCK_DGRAM)
350 return "ListenDatagram";
351 else if (type == SOCK_SEQPACKET)
352 return "ListenSequentialPacket";
353
034c6ed7 354 assert_not_reached("Unknown socket type");
542563ba
LP		 355 return NULL;
356}
357
87f0e418 358static void socket_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 359
5cb5a6ff 360 SocketExecCommand c;
87f0e418 361 Socket *s = SOCKET(u);
542563ba 362 SocketPort *p;
82ba9f08
LP		 363 const char *prefix2;
364 char *p2;
5cb5a6ff
LP		 365
366 assert(s);
fa068367 367 assert(f);
5cb5a6ff 368
82ba9f08
LP		 369 p2 = strappend(prefix, "\t");
370 prefix2 = p2 ? p2 : prefix;
c43d20a0 371
5cb5a6ff
LP		 372 fprintf(f,
373 "%sSocket State: %s\n"
542563ba 374 "%sBindIPv6Only: %s\n"
b5a0699f
LP		 375 "%sBacklog: %u\n"
376 "%sSocketMode: %04o\n"
4fd5948e
LP		 377 "%sDirectoryMode: %04o\n"
378 "%sKeepAlive: %s\n"
cebf8b20
TT		 379 "%sFreeBind: %s\n"
380 "%sTCPCongestion: %s\n",
a16e1123 381 prefix, socket_state_to_string(s->state),
c0120d99 382 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 383 prefix, s->backlog,
384 prefix, s->socket_mode,
4fd5948e
LP		 385 prefix, s->directory_mode,
386 prefix, yes_no(s->keep_alive),
cebf8b20 387 prefix, yes_no(s->free_bind),
83a95334 388 prefix, strna(s->tcp_congestion));
542563ba 389
70123e68
LP		 390 if (s->control_pid > 0)
391 fprintf(f,
bb00e604
LP		 392 "%sControl PID: %lu\n",
393 prefix, (unsigned long) s->control_pid);
70123e68 394
acbb0225
LP		 395 if (s->bind_to_device)
396 fprintf(f,
397 "%sBindToDevice: %s\n",
398 prefix, s->bind_to_device);
399
4f2d528d
LP		 400 if (s->accept)
401 fprintf(f,
6cf6bbc2
LP		 402 "%sAccepted: %u\n"
403 "%sNConnections: %u\n"
404 "%sMaxConnections: %u\n",
405 prefix, s->n_accepted,
406 prefix, s->n_connections,
407 prefix, s->max_connections);
4f2d528d 408
4fd5948e
LP		 409 if (s->priority >= 0)
410 fprintf(f,
411 "%sPriority: %i\n",
412 prefix, s->priority);
413
414 if (s->receive_buffer > 0)
415 fprintf(f,
416 "%sReceiveBuffer: %zu\n",
417 prefix, s->receive_buffer);
418
419 if (s->send_buffer > 0)
420 fprintf(f,
421 "%sSendBuffer: %zu\n",
422 prefix, s->send_buffer);
423
424 if (s->ip_tos >= 0)
425 fprintf(f,
426 "%sIPTOS: %i\n",
427 prefix, s->ip_tos);
428
429 if (s->ip_ttl >= 0)
430 fprintf(f,
431 "%sIPTTL: %i\n",
432 prefix, s->ip_ttl);
433
434 if (s->pipe_size > 0)
435 fprintf(f,
436 "%sPipeSize: %zu\n",
437 prefix, s->pipe_size);
438
439 if (s->mark >= 0)
440 fprintf(f,
441 "%sMark: %i\n",
442 prefix, s->mark);
443
034c6ed7 444 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 445
542563ba
LP		 446 if (p->type == SOCKET_SOCKET) {
447 const char *t;
448 int r;
e364ad06 449 char *k = NULL;
542563ba
LP		 450
451 if ((r = socket_address_print(&p->address, &k)) < 0)
452 t = strerror(-r);
453 else
454 t = k;
455
e364ad06 456 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), t);
542563ba
LP		 457 free(k);
458 } else
459 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
460 }
5cb5a6ff
LP		 461
462 exec_context_dump(&s->exec_context, f, prefix);
463
e537352b 464 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 465 if (!s->exec_command[c])
466 continue;
5cb5a6ff 467
40d50879 468 fprintf(f, "%s-> %s:\n",
a16e1123 469 prefix, socket_exec_command_to_string(c));
c43d20a0
LP		 470
471 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 472 }
c43d20a0 473
82ba9f08 474 free(p2);
5cb5a6ff
LP		 475}
476
4f2d528d
LP		 477static int instance_from_socket(int fd, unsigned nr, char **instance) {
478 socklen_t l;
479 char *r;
480 union {
481 struct sockaddr sa;
482 struct sockaddr_un un;
483 struct sockaddr_in in;
484 struct sockaddr_in6 in6;
485 struct sockaddr_storage storage;
486 } local, remote;
487
488 assert(fd >= 0);
489 assert(instance);
490
491 l = sizeof(local);
492 if (getsockname(fd, &local.sa, &l) < 0)
493 return -errno;
494
495 l = sizeof(remote);
496 if (getpeername(fd, &remote.sa, &l) < 0)
497 return -errno;
498
499 switch (local.sa.sa_family) {
500
501 case AF_INET: {
502 uint32_t
503 a = ntohl(local.in.sin_addr.s_addr),
504 b = ntohl(remote.in.sin_addr.s_addr);
505
506 if (asprintf(&r,
b15bdda8 507 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
4f2d528d
LP		 508 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
509 ntohs(local.in.sin_port),
510 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
511 ntohs(remote.in.sin_port)) < 0)
512 return -ENOMEM;
513
514 break;
515 }
516
517 case AF_INET6: {
2b061f5a
LP		 518 static const char ipv4_prefix[] = {
519 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
520 };
521
522 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
523 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
524 const uint8_t
525 *a = local.in6.sin6_addr.s6_addr+12,
526 *b = remote.in6.sin6_addr.s6_addr+12;
527
528 if (asprintf(&r,
b15bdda8 529 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
2b061f5a
LP		 530 a[0], a[1], a[2], a[3],
531 ntohs(local.in6.sin6_port),
532 b[0], b[1], b[2], b[3],
533 ntohs(remote.in6.sin6_port)) < 0)
534 return -ENOMEM;
535 } else {
536 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
537
538 if (asprintf(&r,
b15bdda8 539 "%s:%u-%s:%u",
2b061f5a
LP		 540 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
541 ntohs(local.in6.sin6_port),
542 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
543 ntohs(remote.in6.sin6_port)) < 0)
544 return -ENOMEM;
545 }
4f2d528d
LP		 546
547 break;
548 }
549
550 case AF_UNIX: {
551 struct ucred ucred;
552
553 l = sizeof(ucred);
554 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
555 return -errno;
556
557 if (asprintf(&r,
bb00e604 558 "%u-%lu-%lu",
4f2d528d 559 nr,
bb00e604
LP		 560 (unsigned long) ucred.pid,
561 (unsigned long) ucred.uid) < 0)
4f2d528d
LP		 562 return -ENOMEM;
563
564 break;
565 }
566
567 default:
568 assert_not_reached("Unhandled socket type.");
569 }
570
571 *instance = r;
572 return 0;
573}
574
034c6ed7 575static void socket_close_fds(Socket *s) {
83c60c9f
LP		 576 SocketPort *p;
577
578 assert(s);
579
034c6ed7 580 LIST_FOREACH(port, p, s->ports) {
83c60c9f
LP		 581 if (p->fd < 0)
582 continue;
583
acbb0225 584 unit_unwatch_fd(UNIT(s), &p->fd_watch);
a16e1123
LP		 585 close_nointr_nofail(p->fd);
586
587 /* One little note: we should never delete any sockets
588 * in the file system here! After all some other
589 * process we spawned might still have a reference of
590 * this fd and wants to continue to use it. Therefore
591 * we delete sockets in the file system before we
592 * create a new one, not after we stopped using
593 * one! */
9152c765 594
83c60c9f
LP		 595 p->fd = -1;
596 }
597}
598
4fd5948e
LP		 599static void socket_apply_socket_options(Socket *s, int fd) {
600 assert(s);
601 assert(fd >= 0);
602
603 if (s->keep_alive) {
604 int b = s->keep_alive;
605 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
606 log_warning("SO_KEEPALIVE failed: %m");
607 }
608
609 if (s->priority >= 0)
610 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
611 log_warning("SO_PRIORITY failed: %m");
612
613 if (s->receive_buffer > 0) {
614 int value = (int) s->receive_buffer;
615 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
616 log_warning("SO_RCVBUF failed: %m");
617 }
618
619 if (s->send_buffer > 0) {
620 int value = (int) s->send_buffer;
621 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
622 log_warning("SO_SNDBUF failed: %m");
623 }
624
625 if (s->mark >= 0)
626 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
627 log_warning("SO_MARK failed: %m");
628
629 if (s->ip_tos >= 0)
630 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
631 log_warning("IP_TOS failed: %m");
632
46925ac5
LP		 633 if (s->ip_ttl >= 0) {
634 int r, x;
635
636 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
5bfcc1c6
FF		 637
638 if (socket_ipv6_is_supported())
639 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
640 else {
641 x = -1;
642 errno = EAFNOSUPPORT;
643 }
46925ac5
LP		 644
645 if (r < 0 && x < 0)
646 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
647 }
cebf8b20
TT		 648
649 if (s->tcp_congestion)
650 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
651 log_warning("TCP_CONGESTION failed: %m");
4fd5948e
LP		 652}
653
b15bdda8 654static void socket_apply_fifo_options(Socket *s, int fd) {
4fd5948e
LP		 655 assert(s);
656 assert(fd >= 0);
657
658 if (s->pipe_size > 0)
659 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
660 log_warning("F_SETPIPE_SZ: %m");
661}
662
7a58bfa4 663
b15bdda8
LP		 664static int fifo_address_create(
665 const char *path,
666 mode_t directory_mode,
667 mode_t socket_mode,
b15bdda8
LP		 668 int *_fd) {
669
7a58bfa4 670 int fd = -1, r = 0;
b15bdda8
LP		 671 struct stat st;
672 mode_t old_mask;
673
674 assert(path);
675 assert(_fd);
676
677 mkdir_parents(path, directory_mode);
678
c4e2ceae 679 if ((r = label_fifofile_set(path)) < 0)
56cf987f 680 goto fail;
b15bdda8
LP		 681
682 /* Enforce the right access mode for the fifo */
683 old_mask = umask(~ socket_mode);
684
685 /* Include the original umask in our mask */
686 umask(~socket_mode | old_mask);
687
688 r = mkfifo(path, socket_mode);
689 umask(old_mask);
690
691 if (r < 0) {
692 r = -errno;
693 goto fail;
694 }
695
696 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
697 r = -errno;
698 goto fail;
699 }
700
56cf987f 701 label_file_clear();
7a58bfa4 702
b15bdda8
LP		 703 if (fstat(fd, &st) < 0) {
704 r = -errno;
705 goto fail;
706 }
707
708 if (!S_ISFIFO(st.st_mode) ||
de0200fc 709 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
b15bdda8
LP		 710 st.st_uid != getuid() ||
711 st.st_gid != getgid()) {
712
713 r = -EEXIST;
714 goto fail;
715 }
716
717 *_fd = fd;
718 return 0;
719
720fail:
56cf987f
DW		 721 label_file_clear();
722
b15bdda8
LP		 723 if (fd >= 0)
724 close_nointr_nofail(fd);
725
726 return r;
727}
728
034c6ed7 729static int socket_open_fds(Socket *s) {
83c60c9f
LP		 730 SocketPort *p;
731 int r;
56cf987f 732 char *label = NULL;
049f8642 733 bool know_label = false;
83c60c9f
LP		 734
735 assert(s);
736
034c6ed7 737 LIST_FOREACH(port, p, s->ports) {
83c60c9f 738
034c6ed7
LP		 739 if (p->fd >= 0)
740 continue;
83c60c9f
LP		 741
742 if (p->type == SOCKET_SOCKET) {
743
049f8642
LP		 744 if (!know_label) {
745
746 if ((r = socket_instantiate_service(s)) < 0)
747 return r;
748
749 if ((r = label_get_socket_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label)) < 0)
750 return r;
751
752 know_label = true;
753 }
754
b5a0699f
LP		 755 if ((r = socket_address_listen(
756 &p->address,
757 s->backlog,
758 s->bind_ipv6_only,
759 s->bind_to_device,
4fd5948e 760 s->free_bind,
b5a0699f
LP		 761 s->directory_mode,
762 s->socket_mode,
56cf987f 763 label,
b5a0699f 764 &p->fd)) < 0)
83c60c9f
LP		 765 goto rollback;
766
4fd5948e
LP		 767 socket_apply_socket_options(s, p->fd);
768
b15bdda8 769 } else if (p->type == SOCKET_FIFO) {
83c60c9f 770
b15bdda8
LP		 771 if ((r = fifo_address_create(
772 p->path,
773 s->directory_mode,
774 s->socket_mode,
b15bdda8 775 &p->fd)) < 0)
83c60c9f 776 goto rollback;
83c60c9f 777
b15bdda8 778 socket_apply_fifo_options(s, p->fd);
83c60c9f 779
b15bdda8
LP		 780 } else
781 assert_not_reached("Unknown port type");
034c6ed7
LP		 782 }
783
56cf987f 784 label_free(label);
034c6ed7
LP		 785 return 0;
786
787rollback:
788 socket_close_fds(s);
56cf987f 789 label_free(label);
034c6ed7
LP		 790 return r;
791}
792
793static void socket_unwatch_fds(Socket *s) {
794 SocketPort *p;
9152c765 795
034c6ed7
LP		 796 assert(s);
797
798 LIST_FOREACH(port, p, s->ports) {
799 if (p->fd < 0)
800 continue;
801
acbb0225 802 unit_unwatch_fd(UNIT(s), &p->fd_watch);
83c60c9f 803 }
034c6ed7
LP		 804}
805
806static int socket_watch_fds(Socket *s) {
807 SocketPort *p;
808 int r;
809
810 assert(s);
83c60c9f 811
034c6ed7
LP		 812 LIST_FOREACH(port, p, s->ports) {
813 if (p->fd < 0)
814 continue;
815
cabab516 816 p->fd_watch.socket_accept =
4f2d528d 817 s->accept &&
dd5ad9d4 818 p->type == SOCKET_SOCKET &&
4f2d528d
LP		 819 socket_address_can_accept(&p->address);
820
f94ea366 821 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
034c6ed7
LP		 822 goto fail;
823 }
83c60c9f 824
542563ba 825 return 0;
83c60c9f 826
034c6ed7
LP		 827fail:
828 socket_unwatch_fds(s);
829 return r;
830}
831
832static void socket_set_state(Socket *s, SocketState state) {
833 SocketState old_state;
834 assert(s);
835
836 old_state = s->state;
837 s->state = state;
838
839 if (state != SOCKET_START_PRE &&
840 state != SOCKET_START_POST &&
841 state != SOCKET_STOP_PRE &&
842 state != SOCKET_STOP_PRE_SIGTERM &&
843 state != SOCKET_STOP_PRE_SIGKILL &&
844 state != SOCKET_STOP_POST &&
80876c20
LP		 845 state != SOCKET_FINAL_SIGTERM &&
846 state != SOCKET_FINAL_SIGKILL) {
acbb0225 847 unit_unwatch_timer(UNIT(s), &s->timer_watch);
5e94833f 848 socket_unwatch_control_pid(s);
034c6ed7 849 s->control_command = NULL;
a16e1123 850 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 851 }
034c6ed7 852
a16e1123
LP		 853 if (state != SOCKET_LISTENING)
854 socket_unwatch_fds(s);
855
034c6ed7
LP		 856 if (state != SOCKET_START_POST &&
857 state != SOCKET_LISTENING &&
858 state != SOCKET_RUNNING &&
859 state != SOCKET_STOP_PRE &&
860 state != SOCKET_STOP_PRE_SIGTERM &&
861 state != SOCKET_STOP_PRE_SIGKILL)
862 socket_close_fds(s);
863
e537352b 864 if (state != old_state)
40d50879 865 log_debug("%s changed %s -> %s",
a16e1123
LP		 866 s->meta.id,
867 socket_state_to_string(old_state),
868 socket_state_to_string(state));
acbb0225
LP		 869
870 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 871}
872
a16e1123
LP		 873static int socket_coldplug(Unit *u) {
874 Socket *s = SOCKET(u);
875 int r;
876
877 assert(s);
878 assert(s->state == SOCKET_DEAD);
879
880 if (s->deserialized_state != s->state) {
881
882 if (s->deserialized_state == SOCKET_START_PRE ||
883 s->deserialized_state == SOCKET_START_POST ||
884 s->deserialized_state == SOCKET_STOP_PRE ||
885 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
886 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
887 s->deserialized_state == SOCKET_STOP_POST ||
888 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
889 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
890
891 if (s->control_pid <= 0)
892 return -EBADMSG;
893
894 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
895 return r;
896
897 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
898 return r;
899 }
900
901 if (s->deserialized_state == SOCKET_START_POST ||
902 s->deserialized_state == SOCKET_LISTENING ||
903 s->deserialized_state == SOCKET_RUNNING ||
904 s->deserialized_state == SOCKET_STOP_PRE ||
905 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
906 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
907 if ((r = socket_open_fds(s)) < 0)
908 return r;
909
910 if (s->deserialized_state == SOCKET_LISTENING)
911 if ((r = socket_watch_fds(s)) < 0)
912 return r;
913
914 socket_set_state(s, s->deserialized_state);
915 }
916
917 return 0;
918}
919
e537352b 920static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
034c6ed7
LP		 921 pid_t pid;
922 int r;
9e2f7c11 923 char **argv;
034c6ed7
LP		 924
925 assert(s);
926 assert(c);
927 assert(_pid);
928
e537352b
LP		 929 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
930 goto fail;
034c6ed7 931
9e2f7c11
LP		 932 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
933 r = -ENOMEM;
934 goto fail;
935 }
936
937 r = exec_spawn(c,
938 argv,
939 &s->exec_context,
940 NULL, 0,
1137a57c 941 s->meta.manager->environment,
9e2f7c11
LP		 942 true,
943 true,
1e3ad081 944 true,
4cd1fbcc
LP		 945 s->meta.manager->confirm_spawn,
946 s->meta.cgroup_bondings,
9e2f7c11
LP		 947 &pid);
948
949 strv_free(argv);
950 if (r < 0)
034c6ed7
LP		 951 goto fail;
952
87f0e418 953 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 954 /* FIXME: we need to do something here */
955 goto fail;
83c60c9f 956
034c6ed7
LP		 957 *_pid = pid;
958
959 return 0;
960
961fail:
e537352b 962 unit_unwatch_timer(UNIT(s), &s->timer_watch);
83c60c9f
LP		 963
964 return r;
542563ba
LP		 965}
966
034c6ed7
LP		 967static void socket_enter_dead(Socket *s, bool success) {
968 assert(s);
969
970 if (!success)
971 s->failure = true;
972
fdf20a31 973 socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
034c6ed7
LP		 974}
975
80876c20
LP		 976static void socket_enter_signal(Socket *s, SocketState state, bool success);
977
034c6ed7
LP		 978static void socket_enter_stop_post(Socket *s, bool success) {
979 int r;
980 assert(s);
981
982 if (!success)
983 s->failure = true;
984
5e94833f
LP		 985 socket_unwatch_control_pid(s);
986
a16e1123
LP		 987 s->control_command_id = SOCKET_EXEC_STOP_POST;
988
80876c20 989 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
e537352b 990 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 991 goto fail;
992
80876c20
LP		 993 socket_set_state(s, SOCKET_STOP_POST);
994 } else
995 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
034c6ed7
LP		 996
997 return;
998
999fail:
6cf6bbc2 1000 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
80876c20 1001 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1002}
1003
1004static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1005 int r;
ca949c9d
LP		 1006 Set *pid_set = NULL;
1007 bool wait_for_exit = false;
034c6ed7
LP		 1008
1009 assert(s);
1010
1011 if (!success)
1012 s->failure = true;
1013
2e22afe9
LP		 1014 if (s->exec_context.kill_mode != KILL_NONE) {
1015 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
034c6ed7 1016
ca949c9d
LP		 1017 if (s->control_pid > 0) {
1018 if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1019 -s->control_pid :
1020 s->control_pid, sig) < 0 && errno != ESRCH)
50159e6a 1021
ca949c9d
LP		 1022 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1023 else
1024 wait_for_exit = true;
034c6ed7 1025 }
50159e6a 1026
ca949c9d
LP		 1027 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1028
1029 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1030 r = -ENOMEM;
50159e6a
LP		 1031 goto fail;
1032 }
ca949c9d
LP		 1033
1034 /* Exclude the control pid from being killed via the cgroup */
1035 if (s->control_pid > 0)
1036 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1037 goto fail;
1038
1039 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1040 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1041 log_warning("Failed to kill control group: %s", strerror(-r));
1042 } else if (r > 0)
1043 wait_for_exit = true;
1044
1045 set_free(pid_set);
1046 }
d6ea93e3 1047 }
034c6ed7 1048
ca949c9d 1049 if (wait_for_exit) {
80876c20
LP		 1050 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1051 goto fail;
d6ea93e3 1052
80876c20
LP		 1053 socket_set_state(s, state);
1054 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1055 socket_enter_stop_post(s, true);
1056 else
034c6ed7
LP		 1057 socket_enter_dead(s, true);
1058
1059 return;
1060
1061fail:
9e2f7c11 1062 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1063
1064 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1065 socket_enter_stop_post(s, false);
1066 else
1067 socket_enter_dead(s, false);
ca949c9d
LP		 1068
1069 if (pid_set)
1070 set_free(pid_set);
034c6ed7
LP		 1071}
1072
1073static void socket_enter_stop_pre(Socket *s, bool success) {
1074 int r;
1075 assert(s);
1076
1077 if (!success)
1078 s->failure = true;
1079
5e94833f
LP		 1080 socket_unwatch_control_pid(s);
1081
a16e1123
LP		 1082 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1083
80876c20 1084 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
e537352b 1085 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1086 goto fail;
1087
80876c20
LP		 1088 socket_set_state(s, SOCKET_STOP_PRE);
1089 } else
034c6ed7
LP		 1090 socket_enter_stop_post(s, true);
1091
1092 return;
1093
1094fail:
6cf6bbc2 1095 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1096 socket_enter_stop_post(s, false);
1097}
1098
e9af15c3
LP		 1099static void socket_enter_listening(Socket *s) {
1100 int r;
1101 assert(s);
1102
1103 if ((r = socket_watch_fds(s)) < 0) {
9e2f7c11 1104 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
e9af15c3
LP		 1105 goto fail;
1106 }
1107
1108 socket_set_state(s, SOCKET_LISTENING);
1109 return;
1110
1111fail:
1112 socket_enter_stop_pre(s, false);
1113}
1114
034c6ed7
LP		 1115static void socket_enter_start_post(Socket *s) {
1116 int r;
1117 assert(s);
1118
e9af15c3 1119 if ((r = socket_open_fds(s)) < 0) {
9e2f7c11 1120 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1121 goto fail;
1122 }
1123
5e94833f
LP		 1124 socket_unwatch_control_pid(s);
1125
a16e1123
LP		 1126 s->control_command_id = SOCKET_EXEC_START_POST;
1127
80876c20 1128 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
e537352b 1129 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
6cf6bbc2 1130 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1131 goto fail;
1132 }
1133
80876c20
LP		 1134 socket_set_state(s, SOCKET_START_POST);
1135 } else
e9af15c3 1136 socket_enter_listening(s);
034c6ed7
LP		 1137
1138 return;
1139
1140fail:
1141 socket_enter_stop_pre(s, false);
1142}
1143
1144static void socket_enter_start_pre(Socket *s) {
1145 int r;
1146 assert(s);
1147
5e94833f
LP		 1148 socket_unwatch_control_pid(s);
1149
a16e1123
LP		 1150 s->control_command_id = SOCKET_EXEC_START_PRE;
1151
80876c20 1152 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
e537352b 1153 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1154 goto fail;
1155
80876c20
LP		 1156 socket_set_state(s, SOCKET_START_PRE);
1157 } else
034c6ed7
LP		 1158 socket_enter_start_post(s);
1159
1160 return;
1161
1162fail:
6cf6bbc2 1163 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1164 socket_enter_dead(s, false);
1165}
1166
4f2d528d 1167static void socket_enter_running(Socket *s, int cfd) {
034c6ed7 1168 int r;
398ef8ba 1169 DBusError error;
034c6ed7
LP		 1170
1171 assert(s);
398ef8ba 1172 dbus_error_init(&error);
034c6ed7 1173
ba3e67a7
LP		 1174 /* We don't take connections anymore if we are supposed to
1175 * shut down anyway */
18ffdfda 1176 if (unit_pending_inactive(UNIT(s))) {
7c610628
LP		 1177 if (cfd >= 0)
1178 close_nointr_nofail(cfd);
1179 else {
1180 /* Flush all sockets by closing and reopening them */
1181 socket_close_fds(s);
1182
1183 if ((r = socket_watch_fds(s)) < 0) {
1184 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1185 socket_enter_stop_pre(s, false);
1186 }
1187 }
1188
ba3e67a7
LP		 1189 return;
1190 }
1191
4f2d528d 1192 if (cfd < 0) {
398ef8ba 1193 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d
LP		 1194 goto fail;
1195
1196 socket_set_state(s, SOCKET_RUNNING);
1197 } else {
b4f10a5e 1198 char *prefix, *instance = NULL, *name;
b15bdda8 1199 Service *service;
4f2d528d 1200
6cf6bbc2
LP		 1201 if (s->n_connections >= s->max_connections) {
1202 log_warning("Too many incoming connections (%u)", s->n_connections);
1203 close_nointr_nofail(cfd);
1204 return;
1205 }
1206
b15bdda8
LP		 1207 if ((r = socket_instantiate_service(s)) < 0)
1208 goto fail;
1209
1210 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
4f2d528d
LP		 1211 goto fail;
1212
4cd1fbcc 1213 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
4f2d528d
LP		 1214 free(instance);
1215 r = -ENOMEM;
1216 goto fail;
1217 }
1218
1219 name = unit_name_build(prefix, instance, ".service");
1220 free(prefix);
1221 free(instance);
1222
b6dbbe1c 1223 if (!name) {
4f2d528d 1224 r = -ENOMEM;
b6dbbe1c
LP		 1225 goto fail;
1226 }
4f2d528d 1227
b15bdda8
LP		 1228 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1229 free(name);
4f2d528d 1230 goto fail;
b15bdda8
LP		 1231 }
1232
1233 service = s->service;
1234 s->service = NULL;
1235 s->n_accepted ++;
4f2d528d 1236
6c073082
LP		 1237 service->meta.no_gc = false;
1238
b15bdda8
LP		 1239 unit_choose_id(UNIT(service), name);
1240 free(name);
1241
1242 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
4f2d528d
LP		 1243 goto fail;
1244
1245 cfd = -1;
6cf6bbc2
LP		 1246 s->n_connections ++;
1247
b15bdda8 1248 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d 1249 goto fail;
c4e2ceae
LP		 1250
1251 /* Notify clients about changed counters */
1252 unit_add_to_dbus_queue(UNIT(s));
4f2d528d 1253 }
034c6ed7 1254
034c6ed7
LP		 1255 return;
1256
1257fail:
398ef8ba 1258 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
80876c20 1259 socket_enter_stop_pre(s, false);
4f2d528d
LP		 1260
1261 if (cfd >= 0)
1262 close_nointr_nofail(cfd);
398ef8ba
LP		 1263
1264 dbus_error_free(&error);
034c6ed7
LP		 1265}
1266
1267static void socket_run_next(Socket *s, bool success) {
1268 int r;
1269
1270 assert(s);
1271 assert(s->control_command);
1272 assert(s->control_command->command_next);
1273
1274 if (!success)
1275 s->failure = true;
1276
5e94833f
LP		 1277 socket_unwatch_control_pid(s);
1278
034c6ed7
LP		 1279 s->control_command = s->control_command->command_next;
1280
e537352b 1281 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1282 goto fail;
1283
1284 return;
1285
1286fail:
6cf6bbc2 1287 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
80876c20
LP		 1288
1289 if (s->state == SOCKET_START_POST)
1290 socket_enter_stop_pre(s, false);
034c6ed7
LP		 1291 else if (s->state == SOCKET_STOP_POST)
1292 socket_enter_dead(s, false);
1293 else
80876c20 1294 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1295}
1296
87f0e418
LP		 1297static int socket_start(Unit *u) {
1298 Socket *s = SOCKET(u);
83c60c9f
LP		 1299
1300 assert(s);
1301
034c6ed7
LP		 1302 /* We cannot fulfill this request right now, try again later
1303 * please! */
1304 if (s->state == SOCKET_STOP_PRE ||
1305 s->state == SOCKET_STOP_PRE_SIGKILL ||
1306 s->state == SOCKET_STOP_PRE_SIGTERM ||
1307 s->state == SOCKET_STOP_POST ||
80876c20
LP		 1308 s->state == SOCKET_FINAL_SIGTERM ||
1309 s->state == SOCKET_FINAL_SIGKILL)
034c6ed7
LP		 1310 return -EAGAIN;
1311
83c60c9f
LP		 1312 if (s->state == SOCKET_START_PRE ||
1313 s->state == SOCKET_START_POST)
034c6ed7 1314 return 0;
83c60c9f 1315
034c6ed7 1316 /* Cannot run this without the service being around */
4f2d528d
LP		 1317 if (s->service) {
1318 if (s->service->meta.load_state != UNIT_LOADED)
1319 return -ENOENT;
1320
1321 /* If the service is alredy actvie we cannot start the
1322 * socket */
1323 if (s->service->state != SERVICE_DEAD &&
fdf20a31 1324 s->service->state != SERVICE_FAILED &&
4f2d528d
LP		 1325 s->service->state != SERVICE_AUTO_RESTART)
1326 return -EBUSY;
1327 }
e537352b 1328
fdf20a31 1329 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
83c60c9f 1330
034c6ed7
LP		 1331 s->failure = false;
1332 socket_enter_start_pre(s);
1333 return 0;
1334}
83c60c9f 1335
87f0e418
LP		 1336static int socket_stop(Unit *u) {
1337 Socket *s = SOCKET(u);
034c6ed7
LP		 1338
1339 assert(s);
1340
e537352b
LP		 1341 /* Already on it */
1342 if (s->state == SOCKET_STOP_PRE ||
1343 s->state == SOCKET_STOP_PRE_SIGTERM ||
1344 s->state == SOCKET_STOP_PRE_SIGKILL ||
1345 s->state == SOCKET_STOP_POST ||
80876c20 1346 s->state == SOCKET_FINAL_SIGTERM ||
3f6c78dc 1347 s->state == SOCKET_FINAL_SIGKILL)
e537352b
LP		 1348 return 0;
1349
3f6c78dc
LP		 1350 /* If there's already something running we go directly into
1351 * kill mode. */
1352 if (s->state == SOCKET_START_PRE ||
1353 s->state == SOCKET_START_POST) {
1354 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1355 return -EAGAIN;
1356 }
1357
034c6ed7 1358 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
83c60c9f 1359
034c6ed7 1360 socket_enter_stop_pre(s, true);
542563ba
LP		 1361 return 0;
1362}
1363
a16e1123
LP		 1364static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1365 Socket *s = SOCKET(u);
1366 SocketPort *p;
1367 int r;
1368
1369 assert(u);
1370 assert(f);
1371 assert(fds);
1372
1373 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1374 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1375 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1376
1377 if (s->control_pid > 0)
5925dd3c 1378 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
a16e1123
LP		 1379
1380 if (s->control_command_id >= 0)
1381 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1382
1383 LIST_FOREACH(port, p, s->ports) {
1384 int copy;
1385
1386 if (p->fd < 0)
1387 continue;
1388
1389 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1390 return copy;
1391
1392 if (p->type == SOCKET_SOCKET) {
1393 char *t;
1394
1395 if ((r = socket_address_print(&p->address, &t)) < 0)
1396 return r;
1397
27ca8d7a 1398 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
a16e1123
LP		 1399 free(t);
1400 } else {
1401 assert(p->type == SOCKET_FIFO);
1402 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1403 }
1404 }
1405
1406 return 0;
1407}
1408
1409static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1410 Socket *s = SOCKET(u);
a16e1123
LP		 1411
1412 assert(u);
1413 assert(key);
1414 assert(value);
1415 assert(fds);
1416
1417 if (streq(key, "state")) {
1418 SocketState state;
1419
1420 if ((state = socket_state_from_string(value)) < 0)
1421 log_debug("Failed to parse state value %s", value);
1422 else
1423 s->deserialized_state = state;
1424 } else if (streq(key, "failure")) {
1425 int b;
1426
1427 if ((b = parse_boolean(value)) < 0)
1428 log_debug("Failed to parse failure value %s", value);
1429 else
1430 s->failure = b || s->failure;
1431
1432 } else if (streq(key, "n-accepted")) {
1433 unsigned k;
1434
e364ad06 1435 if (safe_atou(value, &k) < 0)
a16e1123
LP		 1436 log_debug("Failed to parse n-accepted value %s", value);
1437 else
1438 s->n_accepted += k;
1439 } else if (streq(key, "control-pid")) {
5925dd3c 1440 pid_t pid;
a16e1123 1441
e364ad06 1442 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1443 log_debug("Failed to parse control-pid value %s", value);
1444 else
5925dd3c 1445 s->control_pid = pid;
a16e1123
LP		 1446 } else if (streq(key, "control-command")) {
1447 SocketExecCommand id;
1448
1449 if ((id = socket_exec_command_from_string(value)) < 0)
1450 log_debug("Failed to parse exec-command value %s", value);
1451 else {
1452 s->control_command_id = id;
1453 s->control_command = s->exec_command[id];
1454 }
1455 } else if (streq(key, "fifo")) {
1456 int fd, skip = 0;
1457 SocketPort *p;
1458
1459 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1460 log_debug("Failed to parse fifo value %s", value);
1461 else {
1462
1463 LIST_FOREACH(port, p, s->ports)
1464 if (streq(p->path, value+skip))
1465 break;
1466
1467 if (p) {
1468 if (p->fd >= 0)
1469 close_nointr_nofail(p->fd);
1470 p->fd = fdset_remove(fds, fd);
1471 }
1472 }
1473
1474 } else if (streq(key, "socket")) {
27ca8d7a 1475 int fd, type, skip = 0;
a16e1123
LP		 1476 SocketPort *p;
1477
27ca8d7a 1478 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
a16e1123
LP		 1479 log_debug("Failed to parse socket value %s", value);
1480 else {
1481
1482 LIST_FOREACH(port, p, s->ports)
27ca8d7a 1483 if (socket_address_is(&p->address, value+skip, type))
a16e1123
LP		 1484 break;
1485
1486 if (p) {
1487 if (p->fd >= 0)
1488 close_nointr_nofail(p->fd);
1489 p->fd = fdset_remove(fds, fd);
1490 }
1491 }
1492
1493 } else
1494 log_debug("Unknown serialization key '%s'", key);
1495
1496 return 0;
1497}
1498
87f0e418
LP		 1499static UnitActiveState socket_active_state(Unit *u) {
1500 assert(u);
5cb5a6ff 1501
acbb0225 1502 return state_translation_table[SOCKET(u)->state];
5cb5a6ff
LP		 1503}
1504
10a94420
LP		 1505static const char *socket_sub_state_to_string(Unit *u) {
1506 assert(u);
1507
a16e1123 1508 return socket_state_to_string(SOCKET(u)->state);
10a94420
LP		 1509}
1510
6cf6bbc2
LP		 1511static bool socket_check_gc(Unit *u) {
1512 Socket *s = SOCKET(u);
1513
1514 assert(u);
1515
1516 return s->n_connections > 0;
1517}
1518
acbb0225 1519static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
87f0e418 1520 Socket *s = SOCKET(u);
4f2d528d 1521 int cfd = -1;
9152c765 1522
034c6ed7 1523 assert(s);
8d567588 1524 assert(fd >= 0);
9152c765 1525
871d7de4
LP		 1526 if (s->state != SOCKET_LISTENING)
1527 return;
1528
9e2f7c11 1529 log_debug("Incoming traffic on %s", u->meta.id);
9152c765 1530
4f2d528d
LP		 1531 if (events != EPOLLIN) {
1532 log_error("Got invalid poll event on socket.");
8d567588 1533 goto fail;
4f2d528d
LP		 1534 }
1535
cabab516 1536 if (w->socket_accept) {
4f2d528d
LP		 1537 for (;;) {
1538
1539 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1540
1541 if (errno == EINTR)
1542 continue;
1543
1544 log_error("Failed to accept socket: %m");
8d567588 1545 goto fail;
4f2d528d
LP		 1546 }
1547
1548 break;
1549 }
4fd5948e
LP		 1550
1551 socket_apply_socket_options(s, cfd);
4f2d528d 1552 }
9152c765 1553
4f2d528d 1554 socket_enter_running(s, cfd);
8d567588
LP		 1555 return;
1556
1557fail:
1558 socket_enter_stop_pre(s, false);
9152c765
LP		 1559}
1560
87f0e418
LP		 1561static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1562 Socket *s = SOCKET(u);
034c6ed7 1563 bool success;
5cb5a6ff
LP		 1564
1565 assert(s);
034c6ed7 1566 assert(pid >= 0);
5cb5a6ff 1567
8c47c732
LP		 1568 if (pid != s->control_pid)
1569 return;
542563ba 1570
034c6ed7
LP		 1571 s->control_pid = 0;
1572
8c47c732 1573 success = is_clean_exit(code, status);
8c47c732 1574
b708e7ce 1575 if (s->control_command) {
b58b4116 1576 exec_status_exit(&s->control_command->exec_status, pid, code, status);
a16e1123 1577
b708e7ce
LP		 1578 if (s->control_command->ignore)
1579 success = true;
1580 }
1581
92abbefb
LP		 1582 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1583 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
b708e7ce 1584 s->failure = s->failure || !success;
034c6ed7 1585
a16e1123
LP		 1586 if (s->control_command && s->control_command->command_next && success) {
1587 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
034c6ed7 1588 socket_run_next(s, success);
acbb0225 1589 } else {
a16e1123
LP		 1590 s->control_command = NULL;
1591 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1592
034c6ed7
LP		 1593 /* No further commands for this step, so let's figure
1594 * out what to do next */
5cb5a6ff 1595
a16e1123 1596 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
acbb0225 1597
034c6ed7
LP		 1598 switch (s->state) {
1599
1600 case SOCKET_START_PRE:
1601 if (success)
acbb0225 1602 socket_enter_start_post(s);
034c6ed7 1603 else
80876c20 1604 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1605 break;
1606
1607 case SOCKET_START_POST:
1608 if (success)
e9af15c3 1609 socket_enter_listening(s);
034c6ed7
LP		 1610 else
1611 socket_enter_stop_pre(s, false);
1612 break;
1613
1614 case SOCKET_STOP_PRE:
1615 case SOCKET_STOP_PRE_SIGTERM:
1616 case SOCKET_STOP_PRE_SIGKILL:
1617 socket_enter_stop_post(s, success);
1618 break;
1619
1620 case SOCKET_STOP_POST:
80876c20
LP		 1621 case SOCKET_FINAL_SIGTERM:
1622 case SOCKET_FINAL_SIGKILL:
034c6ed7
LP		 1623 socket_enter_dead(s, success);
1624 break;
1625
1626 default:
1627 assert_not_reached("Uh, control process died at wrong time.");
1628 }
1629 }
c4e2ceae
LP		 1630
1631 /* Notify clients about changed exit status */
1632 unit_add_to_dbus_queue(u);
034c6ed7 1633}
5cb5a6ff 1634
acbb0225 1635static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
87f0e418 1636 Socket *s = SOCKET(u);
5cb5a6ff 1637
034c6ed7
LP		 1638 assert(s);
1639 assert(elapsed == 1);
acbb0225 1640 assert(w == &s->timer_watch);
034c6ed7
LP		 1641
1642 switch (s->state) {
1643
1644 case SOCKET_START_PRE:
9e2f7c11 1645 log_warning("%s starting timed out. Terminating.", u->meta.id);
80876c20
LP		 1646 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1647
034c6ed7 1648 case SOCKET_START_POST:
9e2f7c11 1649 log_warning("%s starting timed out. Stopping.", u->meta.id);
034c6ed7
LP		 1650 socket_enter_stop_pre(s, false);
1651 break;
1652
1653 case SOCKET_STOP_PRE:
9e2f7c11 1654 log_warning("%s stopping timed out. Terminating.", u->meta.id);
034c6ed7
LP		 1655 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1656 break;
1657
1658 case SOCKET_STOP_PRE_SIGTERM:
9e2f7c11 1659 log_warning("%s stopping timed out. Killing.", u->meta.id);
034c6ed7
LP		 1660 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1661 break;
1662
1663 case SOCKET_STOP_PRE_SIGKILL:
9e2f7c11 1664 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
034c6ed7
LP		 1665 socket_enter_stop_post(s, false);
1666 break;
1667
1668 case SOCKET_STOP_POST:
9e2f7c11 1669 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
80876c20 1670 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1671 break;
1672
80876c20 1673 case SOCKET_FINAL_SIGTERM:
9e2f7c11 1674 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
80876c20 1675 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
034c6ed7
LP		 1676 break;
1677
80876c20 1678 case SOCKET_FINAL_SIGKILL:
fdf20a31 1679 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
034c6ed7
LP		 1680 socket_enter_dead(s, false);
1681 break;
1682
1683 default:
1684 assert_not_reached("Timeout at wrong time.");
1685 }
5cb5a6ff
LP		 1686}
1687
44d8db9e
LP		 1688int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1689 int *rfds;
1690 unsigned rn_fds, k;
1691 SocketPort *p;
1692
1693 assert(s);
1694 assert(fds);
1695 assert(n_fds);
1696
1697 /* Called from the service code for requesting our fds */
1698
1699 rn_fds = 0;
1700 LIST_FOREACH(port, p, s->ports)
1701 if (p->fd >= 0)
1702 rn_fds++;
1703
e364ad06 1704 if (!(rfds = new(int, rn_fds)))
44d8db9e
LP		 1705 return -ENOMEM;
1706
1707 k = 0;
1708 LIST_FOREACH(port, p, s->ports)
1709 if (p->fd >= 0)
1710 rfds[k++] = p->fd;
1711
1712 assert(k == rn_fds);
1713
1714 *fds = rfds;
1715 *n_fds = rn_fds;
1716
1717 return 0;
1718}
1719
ceee3d82
LP		 1720void socket_notify_service_dead(Socket *s) {
1721 assert(s);
1722
6cf6bbc2
LP		 1723 /* The service is dead. Dang!
1724 *
1725 * This is strictly for one-instance-for-all-connections
1726 * services. */
ceee3d82
LP		 1727
1728 if (s->state == SOCKET_RUNNING) {
9e2f7c11 1729 log_debug("%s got notified about service death.", s->meta.id);
ceee3d82
LP		 1730 socket_enter_listening(s);
1731 }
1732}
1733
6cf6bbc2
LP		 1734void socket_connection_unref(Socket *s) {
1735 assert(s);
1736
1737 /* The service is dead. Yay!
1738 *
1739 * This is strictly for one-onstance-per-connection
1740 * services. */
1741
1742 assert(s->n_connections > 0);
1743 s->n_connections--;
1744
1745 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1746}
1747
fdf20a31 1748static void socket_reset_failed(Unit *u) {
5632e374
LP		 1749 Socket *s = SOCKET(u);
1750
1751 assert(s);
1752
fdf20a31 1753 if (s->state == SOCKET_FAILED)
5632e374
LP		 1754 socket_set_state(s, SOCKET_DEAD);
1755
1756 s->failure = false;
1757}
1758
a16e1123
LP		 1759static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1760 [SOCKET_DEAD] = "dead",
1761 [SOCKET_START_PRE] = "start-pre",
1762 [SOCKET_START_POST] = "start-post",
1763 [SOCKET_LISTENING] = "listening",
1764 [SOCKET_RUNNING] = "running",
1765 [SOCKET_STOP_PRE] = "stop-pre",
1766 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1767 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1768 [SOCKET_STOP_POST] = "stop-post",
1769 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1770 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
fdf20a31 1771 [SOCKET_FAILED] = "failed"
a16e1123
LP		 1772};
1773
1774DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1775
1776static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1777 [SOCKET_EXEC_START_PRE] = "StartPre",
1778 [SOCKET_EXEC_START_POST] = "StartPost",
1779 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1780 [SOCKET_EXEC_STOP_POST] = "StopPost"
1781};
1782
1783DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1784
87f0e418 1785const UnitVTable socket_vtable = {
5cb5a6ff
LP		 1786 .suffix = ".socket",
1787
034c6ed7
LP		 1788 .init = socket_init,
1789 .done = socket_done,
a16e1123
LP		 1790 .load = socket_load,
1791
1792 .coldplug = socket_coldplug,
034c6ed7 1793
5cb5a6ff
LP		 1794 .dump = socket_dump,
1795
542563ba
LP		 1796 .start = socket_start,
1797 .stop = socket_stop,
5cb5a6ff 1798
a16e1123
LP		 1799 .serialize = socket_serialize,
1800 .deserialize_item = socket_deserialize_item,
1801
5cb5a6ff 1802 .active_state = socket_active_state,
10a94420 1803 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 1804
6cf6bbc2
LP		 1805 .check_gc = socket_check_gc,
1806
9152c765 1807 .fd_event = socket_fd_event,
034c6ed7 1808 .sigchld_event = socket_sigchld_event,
4139c1b2
LP		 1809 .timer_event = socket_timer_event,
1810
fdf20a31 1811 .reset_failed = socket_reset_failed,
5632e374 1812
c4e2ceae
LP		 1813 .bus_interface = "org.freedesktop.systemd1.Socket",
1814 .bus_message_handler = bus_socket_message_handler,
1815 .bus_invalidating_properties = bus_socket_invalidating_properties
5cb5a6ff 1816};
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