1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
7 #include <netinet/tcp.h>
11 #include <linux/sctp.h>
13 #include "alloc-util.h"
14 #include "bpf-firewall.h"
15 #include "bus-error.h"
18 #include "constants.h"
20 #include "dbus-socket.h"
21 #include "dbus-unit.h"
22 #include "errno-list.h"
23 #include "exit-status.h"
25 #include "format-util.h"
26 #include "in-addr-util.h"
28 #include "ip-protocol-list.h"
29 #include "label-util.h"
31 #include "mkdir-label.h"
32 #include "parse-util.h"
33 #include "path-util.h"
34 #include "process-util.h"
35 #include "selinux-util.h"
36 #include "serialize.h"
38 #include "signal-util.h"
39 #include "smack-util.h"
41 #include "socket-netlink.h"
43 #include "string-table.h"
44 #include "string-util.h"
46 #include "unit-name.h"
48 #include "user-util.h"
54 union sockaddr_union peer
;
58 static const UnitActiveState state_translation_table
[_SOCKET_STATE_MAX
] = {
59 [SOCKET_DEAD
] = UNIT_INACTIVE
,
60 [SOCKET_START_PRE
] = UNIT_ACTIVATING
,
61 [SOCKET_START_CHOWN
] = UNIT_ACTIVATING
,
62 [SOCKET_START_POST
] = UNIT_ACTIVATING
,
63 [SOCKET_LISTENING
] = UNIT_ACTIVE
,
64 [SOCKET_RUNNING
] = UNIT_ACTIVE
,
65 [SOCKET_STOP_PRE
] = UNIT_DEACTIVATING
,
66 [SOCKET_STOP_PRE_SIGTERM
] = UNIT_DEACTIVATING
,
67 [SOCKET_STOP_PRE_SIGKILL
] = UNIT_DEACTIVATING
,
68 [SOCKET_STOP_POST
] = UNIT_DEACTIVATING
,
69 [SOCKET_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
70 [SOCKET_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
71 [SOCKET_FAILED
] = UNIT_FAILED
,
72 [SOCKET_CLEANING
] = UNIT_MAINTENANCE
,
75 static int socket_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
76 static int socket_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
77 static void flush_ports(Socket
*s
);
79 static void socket_init(Unit
*u
) {
80 Socket
*s
= SOCKET(u
);
83 assert(u
->load_state
== UNIT_STUB
);
85 s
->backlog
= SOMAXCONN_DELUXE
;
86 s
->timeout_usec
= u
->manager
->default_timeout_start_usec
;
87 s
->directory_mode
= 0755;
88 s
->socket_mode
= 0666;
90 s
->max_connections
= 64;
97 s
->exec_context
.std_output
= u
->manager
->default_std_output
;
98 s
->exec_context
.std_error
= u
->manager
->default_std_error
;
100 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
102 s
->trigger_limit
.interval
= USEC_INFINITY
;
103 s
->trigger_limit
.burst
= UINT_MAX
;
106 static void socket_unwatch_control_pid(Socket
*s
) {
109 if (s
->control_pid
<= 0)
112 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->control_pid
));
115 static void socket_cleanup_fd_list(SocketPort
*p
) {
118 close_many(p
->auxiliary_fds
, p
->n_auxiliary_fds
);
119 p
->auxiliary_fds
= mfree(p
->auxiliary_fds
);
120 p
->n_auxiliary_fds
= 0;
123 SocketPort
*socket_port_free(SocketPort
*p
) {
127 sd_event_source_unref(p
->event_source
);
129 socket_cleanup_fd_list(p
);
136 void socket_free_ports(Socket
*s
) {
141 while ((p
= s
->ports
)) {
142 LIST_REMOVE(port
, s
->ports
, p
);
147 static void socket_done(Unit
*u
) {
148 Socket
*s
= SOCKET(u
);
153 socket_free_ports(s
);
155 while ((p
= set_steal_first(s
->peers_by_address
)))
158 s
->peers_by_address
= set_free(s
->peers_by_address
);
160 s
->exec_runtime
= exec_runtime_free(s
->exec_runtime
);
161 exec_command_free_array(s
->exec_command
, _SOCKET_EXEC_COMMAND_MAX
);
162 s
->control_command
= NULL
;
164 socket_unwatch_control_pid(s
);
166 unit_ref_unset(&s
->service
);
168 s
->tcp_congestion
= mfree(s
->tcp_congestion
);
169 s
->bind_to_device
= mfree(s
->bind_to_device
);
171 s
->smack
= mfree(s
->smack
);
172 s
->smack_ip_in
= mfree(s
->smack_ip_in
);
173 s
->smack_ip_out
= mfree(s
->smack_ip_out
);
175 strv_free(s
->symlinks
);
177 s
->user
= mfree(s
->user
);
178 s
->group
= mfree(s
->group
);
180 s
->fdname
= mfree(s
->fdname
);
182 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
185 static int socket_arm_timer(Socket
*s
, usec_t usec
) {
190 if (s
->timer_event_source
) {
191 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
195 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
198 if (usec
== USEC_INFINITY
)
201 r
= sd_event_add_time(
202 UNIT(s
)->manager
->event
,
203 &s
->timer_event_source
,
206 socket_dispatch_timer
, s
);
210 (void) sd_event_source_set_description(s
->timer_event_source
, "socket-timer");
215 static bool have_non_accept_socket(Socket
*s
) {
221 LIST_FOREACH(port
, p
, s
->ports
) {
223 if (p
->type
!= SOCKET_SOCKET
)
226 if (!socket_address_can_accept(&p
->address
))
233 static int socket_add_mount_dependencies(Socket
*s
) {
238 LIST_FOREACH(port
, p
, s
->ports
) {
239 const char *path
= NULL
;
241 if (p
->type
== SOCKET_SOCKET
)
242 path
= socket_address_get_path(&p
->address
);
243 else if (IN_SET(p
->type
, SOCKET_FIFO
, SOCKET_SPECIAL
, SOCKET_USB_FUNCTION
))
249 r
= unit_require_mounts_for(UNIT(s
), path
, UNIT_DEPENDENCY_FILE
);
257 static int socket_add_device_dependencies(Socket
*s
) {
262 if (!s
->bind_to_device
|| streq(s
->bind_to_device
, "lo"))
265 t
= strjoina("/sys/subsystem/net/devices/", s
->bind_to_device
);
266 return unit_add_node_dependency(UNIT(s
), t
, UNIT_BINDS_TO
, UNIT_DEPENDENCY_FILE
);
269 static int socket_add_default_dependencies(Socket
*s
) {
273 if (!UNIT(s
)->default_dependencies
)
276 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_BEFORE
, SPECIAL_SOCKETS_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
280 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
281 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
286 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
289 static bool socket_has_exec(Socket
*s
) {
293 for (i
= 0; i
< _SOCKET_EXEC_COMMAND_MAX
; i
++)
294 if (s
->exec_command
[i
])
300 static int socket_add_extras(Socket
*s
) {
306 /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit
307 * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept()
308 * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly
309 * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic
310 * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to
311 * process whatever is queued in one go, and thus should normally never have to be started frequently. This is
312 * different for Accept=yes where each connection is processed by a new service instance, and thus frequent
313 * service starts are typical. */
315 if (s
->trigger_limit
.interval
== USEC_INFINITY
)
316 s
->trigger_limit
.interval
= 2 * USEC_PER_SEC
;
318 if (s
->trigger_limit
.burst
== UINT_MAX
) {
320 s
->trigger_limit
.burst
= 200;
322 s
->trigger_limit
.burst
= 20;
325 if (have_non_accept_socket(s
)) {
327 if (!UNIT_DEREF(s
->service
)) {
330 r
= unit_load_related_unit(u
, ".service", &x
);
334 unit_ref_set(&s
->service
, u
, x
);
337 r
= unit_add_two_dependencies(u
, UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT_DEREF(s
->service
), true, UNIT_DEPENDENCY_IMPLICIT
);
342 r
= socket_add_mount_dependencies(s
);
346 r
= socket_add_device_dependencies(s
);
350 r
= unit_patch_contexts(u
);
354 if (socket_has_exec(s
)) {
355 r
= unit_add_exec_dependencies(u
, &s
->exec_context
);
360 r
= unit_set_default_slice(u
);
364 r
= socket_add_default_dependencies(s
);
371 static const char *socket_find_symlink_target(Socket
*s
) {
372 const char *found
= NULL
;
374 LIST_FOREACH(port
, p
, s
->ports
) {
375 const char *f
= NULL
;
384 f
= socket_address_get_path(&p
->address
);
402 static int socket_verify(Socket
*s
) {
404 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
407 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing.");
409 if (s
->accept
&& have_non_accept_socket(s
))
410 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing.");
412 if (s
->accept
&& s
->max_connections
<= 0)
413 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "MaxConnection= setting too small. Refusing.");
415 if (s
->accept
&& UNIT_DEREF(s
->service
))
416 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Explicit service configuration for accepting socket units not supported. Refusing.");
418 if (s
->exec_context
.pam_name
&& s
->kill_context
.kill_mode
!= KILL_CONTROL_GROUP
)
419 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing.");
421 if (!strv_isempty(s
->symlinks
) && !socket_find_symlink_target(s
))
422 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit has symlinks set but none or more than one node in the file system. Refusing.");
427 static void peer_address_hash_func(const SocketPeer
*s
, struct siphash
*state
) {
430 if (s
->peer
.sa
.sa_family
== AF_INET
)
431 siphash24_compress(&s
->peer
.in
.sin_addr
, sizeof(s
->peer
.in
.sin_addr
), state
);
432 else if (s
->peer
.sa
.sa_family
== AF_INET6
)
433 siphash24_compress(&s
->peer
.in6
.sin6_addr
, sizeof(s
->peer
.in6
.sin6_addr
), state
);
434 else if (s
->peer
.sa
.sa_family
== AF_VSOCK
)
435 siphash24_compress(&s
->peer
.vm
.svm_cid
, sizeof(s
->peer
.vm
.svm_cid
), state
);
437 assert_not_reached();
440 static int peer_address_compare_func(const SocketPeer
*x
, const SocketPeer
*y
) {
443 r
= CMP(x
->peer
.sa
.sa_family
, y
->peer
.sa
.sa_family
);
447 switch (x
->peer
.sa
.sa_family
) {
449 return memcmp(&x
->peer
.in
.sin_addr
, &y
->peer
.in
.sin_addr
, sizeof(x
->peer
.in
.sin_addr
));
451 return memcmp(&x
->peer
.in6
.sin6_addr
, &y
->peer
.in6
.sin6_addr
, sizeof(x
->peer
.in6
.sin6_addr
));
453 return CMP(x
->peer
.vm
.svm_cid
, y
->peer
.vm
.svm_cid
);
455 assert_not_reached();
458 DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops
, SocketPeer
, peer_address_hash_func
, peer_address_compare_func
);
460 static int socket_load(Unit
*u
) {
461 Socket
*s
= SOCKET(u
);
465 assert(u
->load_state
== UNIT_STUB
);
467 r
= unit_load_fragment_and_dropin(u
, true);
471 if (u
->load_state
!= UNIT_LOADED
)
474 /* This is a new unit? Then let's add in some extras */
475 r
= socket_add_extras(s
);
479 return socket_verify(s
);
482 static SocketPeer
*socket_peer_new(void) {
485 p
= new(SocketPeer
, 1);
495 static SocketPeer
*socket_peer_free(SocketPeer
*p
) {
499 set_remove(p
->socket
->peers_by_address
, p
);
504 DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer
, socket_peer
, socket_peer_free
);
506 int socket_acquire_peer(Socket
*s
, int fd
, SocketPeer
**p
) {
507 _cleanup_(socket_peer_unrefp
) SocketPeer
*remote
= NULL
;
509 .peer_salen
= sizeof(union sockaddr_union
),
516 if (getpeername(fd
, &sa
.peer
.sa
, &sa
.peer_salen
) < 0)
517 return log_unit_error_errno(UNIT(s
), errno
, "getpeername failed: %m");
519 if (!IN_SET(sa
.peer
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
524 r
= set_ensure_allocated(&s
->peers_by_address
, &peer_address_hash_ops
);
528 i
= set_get(s
->peers_by_address
, &sa
);
530 *p
= socket_peer_ref(i
);
534 remote
= socket_peer_new();
538 remote
->peer
= sa
.peer
;
539 remote
->peer_salen
= sa
.peer_salen
;
541 r
= set_put(s
->peers_by_address
, remote
);
547 *p
= TAKE_PTR(remote
);
551 static const char* listen_lookup(int family
, int type
) {
553 if (family
== AF_NETLINK
)
554 return "ListenNetlink";
556 if (type
== SOCK_STREAM
)
557 return "ListenStream";
558 else if (type
== SOCK_DGRAM
)
559 return "ListenDatagram";
560 else if (type
== SOCK_SEQPACKET
)
561 return "ListenSequentialPacket";
563 assert_not_reached();
567 static void socket_dump(Unit
*u
, FILE *f
, const char *prefix
) {
568 Socket
*s
= SOCKET(u
);
569 const char *prefix2
, *str
;
574 prefix
= strempty(prefix
);
575 prefix2
= strjoina(prefix
, "\t");
578 "%sSocket State: %s\n"
580 "%sClean Result: %s\n"
581 "%sBindIPv6Only: %s\n"
583 "%sSocketMode: %04o\n"
584 "%sDirectoryMode: %04o\n"
588 "%sTransparent: %s\n"
590 "%sPassCredentials: %s\n"
591 "%sPassSecurity: %s\n"
592 "%sPassPacketInfo: %s\n"
593 "%sTCPCongestion: %s\n"
594 "%sRemoveOnStop: %s\n"
596 "%sFileDescriptorName: %s\n"
597 "%sSELinuxContextFromNet: %s\n",
598 prefix
, socket_state_to_string(s
->state
),
599 prefix
, socket_result_to_string(s
->result
),
600 prefix
, socket_result_to_string(s
->clean_result
),
601 prefix
, socket_address_bind_ipv6_only_to_string(s
->bind_ipv6_only
),
603 prefix
, s
->socket_mode
,
604 prefix
, s
->directory_mode
,
605 prefix
, yes_no(s
->keep_alive
),
606 prefix
, yes_no(s
->no_delay
),
607 prefix
, yes_no(s
->free_bind
),
608 prefix
, yes_no(s
->transparent
),
609 prefix
, yes_no(s
->broadcast
),
610 prefix
, yes_no(s
->pass_cred
),
611 prefix
, yes_no(s
->pass_sec
),
612 prefix
, yes_no(s
->pass_pktinfo
),
613 prefix
, strna(s
->tcp_congestion
),
614 prefix
, yes_no(s
->remove_on_stop
),
615 prefix
, yes_no(s
->writable
),
616 prefix
, socket_fdname(s
),
617 prefix
, yes_no(s
->selinux_context_from_net
));
619 if (s
->timestamping
!= SOCKET_TIMESTAMPING_OFF
)
621 "%sTimestamping: %s\n",
622 prefix
, socket_timestamping_to_string(s
->timestamping
));
624 if (s
->control_pid
> 0)
626 "%sControl PID: "PID_FMT
"\n",
627 prefix
, s
->control_pid
);
629 if (s
->bind_to_device
)
631 "%sBindToDevice: %s\n",
632 prefix
, s
->bind_to_device
);
637 "%sNConnections: %u\n"
638 "%sMaxConnections: %u\n"
639 "%sMaxConnectionsPerSource: %u\n",
640 prefix
, s
->n_accepted
,
641 prefix
, s
->n_connections
,
642 prefix
, s
->max_connections
,
643 prefix
, s
->max_connections_per_source
);
646 "%sFlushPending: %s\n",
647 prefix
, yes_no(s
->flush_pending
));
650 if (s
->priority
>= 0)
653 prefix
, s
->priority
);
655 if (s
->receive_buffer
> 0)
657 "%sReceiveBuffer: %zu\n",
658 prefix
, s
->receive_buffer
);
660 if (s
->send_buffer
> 0)
662 "%sSendBuffer: %zu\n",
663 prefix
, s
->send_buffer
);
675 if (s
->pipe_size
> 0)
678 prefix
, s
->pipe_size
);
685 if (s
->mq_maxmsg
> 0)
687 "%sMessageQueueMaxMessages: %li\n",
688 prefix
, s
->mq_maxmsg
);
690 if (s
->mq_msgsize
> 0)
692 "%sMessageQueueMessageSize: %li\n",
693 prefix
, s
->mq_msgsize
);
698 prefix
, yes_no(s
->reuse_port
));
702 "%sSmackLabel: %s\n",
707 "%sSmackLabelIPIn: %s\n",
708 prefix
, s
->smack_ip_in
);
712 "%sSmackLabelIPOut: %s\n",
713 prefix
, s
->smack_ip_out
);
715 if (!isempty(s
->user
) || !isempty(s
->group
))
718 "%sSocketGroup: %s\n",
719 prefix
, strna(s
->user
),
720 prefix
, strna(s
->group
));
722 if (timestamp_is_set(s
->keep_alive_time
))
724 "%sKeepAliveTimeSec: %s\n",
725 prefix
, FORMAT_TIMESPAN(s
->keep_alive_time
, USEC_PER_SEC
));
727 if (s
->keep_alive_interval
> 0)
729 "%sKeepAliveIntervalSec: %s\n",
730 prefix
, FORMAT_TIMESPAN(s
->keep_alive_interval
, USEC_PER_SEC
));
732 if (s
->keep_alive_cnt
> 0)
734 "%sKeepAliveProbes: %u\n",
735 prefix
, s
->keep_alive_cnt
);
737 if (s
->defer_accept
> 0)
739 "%sDeferAcceptSec: %s\n",
740 prefix
, FORMAT_TIMESPAN(s
->defer_accept
, USEC_PER_SEC
));
742 LIST_FOREACH(port
, p
, s
->ports
) {
745 case SOCKET_SOCKET
: {
746 _cleanup_free_
char *k
= NULL
;
749 r
= socket_address_print(&p
->address
, &k
);
752 fprintf(f
, "%s%s: %m\n", prefix
, listen_lookup(socket_address_family(&p
->address
), p
->address
.type
));
754 fprintf(f
, "%s%s: %s\n", prefix
, listen_lookup(socket_address_family(&p
->address
), p
->address
.type
), k
);
758 fprintf(f
, "%sListenSpecial: %s\n", prefix
, p
->path
);
760 case SOCKET_USB_FUNCTION
:
761 fprintf(f
, "%sListenUSBFunction: %s\n", prefix
, p
->path
);
764 fprintf(f
, "%sListenMessageQueue: %s\n", prefix
, p
->path
);
767 fprintf(f
, "%sListenFIFO: %s\n", prefix
, p
->path
);
772 "%sTriggerLimitIntervalSec: %s\n"
773 "%sTriggerLimitBurst: %u\n",
774 prefix
, FORMAT_TIMESPAN(s
->trigger_limit
.interval
, USEC_PER_SEC
),
775 prefix
, s
->trigger_limit
.burst
);
777 str
= ip_protocol_to_name(s
->socket_protocol
);
779 fprintf(f
, "%sSocketProtocol: %s\n", prefix
, str
);
781 if (!strv_isempty(s
->symlinks
)) {
782 fprintf(f
, "%sSymlinks:", prefix
);
783 STRV_FOREACH(q
, s
->symlinks
)
784 fprintf(f
, " %s", *q
);
790 "%sTimeoutSec: %s\n",
791 prefix
, FORMAT_TIMESPAN(s
->timeout_usec
, USEC_PER_SEC
));
793 exec_context_dump(&s
->exec_context
, f
, prefix
);
794 kill_context_dump(&s
->kill_context
, f
, prefix
);
796 for (SocketExecCommand c
= 0; c
< _SOCKET_EXEC_COMMAND_MAX
; c
++) {
797 if (!s
->exec_command
[c
])
800 fprintf(f
, "%s-> %s:\n",
801 prefix
, socket_exec_command_to_string(c
));
803 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
806 cgroup_context_dump(UNIT(s
), f
, prefix
);
809 static int instance_from_socket(int fd
, unsigned nr
, char **instance
) {
812 union sockaddr_union local
, remote
;
818 if (getsockname(fd
, &local
.sa
, &l
) < 0)
822 if (getpeername(fd
, &remote
.sa
, &l
) < 0)
825 switch (local
.sa
.sa_family
) {
829 a
= be32toh(local
.in
.sin_addr
.s_addr
),
830 b
= be32toh(remote
.in
.sin_addr
.s_addr
);
833 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
835 a
>> 24, (a
>> 16) & 0xFF, (a
>> 8) & 0xFF, a
& 0xFF,
836 be16toh(local
.in
.sin_port
),
837 b
>> 24, (b
>> 16) & 0xFF, (b
>> 8) & 0xFF, b
& 0xFF,
838 be16toh(remote
.in
.sin_port
)) < 0)
845 static const unsigned char ipv4_prefix
[] = {
846 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
849 if (memcmp(&local
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0 &&
850 memcmp(&remote
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0) {
852 *a
= local
.in6
.sin6_addr
.s6_addr
+12,
853 *b
= remote
.in6
.sin6_addr
.s6_addr
+12;
856 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
858 a
[0], a
[1], a
[2], a
[3],
859 be16toh(local
.in6
.sin6_port
),
860 b
[0], b
[1], b
[2], b
[3],
861 be16toh(remote
.in6
.sin6_port
)) < 0)
867 IN6_ADDR_TO_STRING(&local
.in6
.sin6_addr
),
868 be16toh(local
.in6
.sin6_port
),
869 IN6_ADDR_TO_STRING(&remote
.in6
.sin6_addr
),
870 be16toh(remote
.in6
.sin6_port
)) < 0)
881 k
= getpeercred(fd
, &ucred
);
884 "%u-"PID_FMT
"-"UID_FMT
,
885 nr
, ucred
.pid
, ucred
.uid
) < 0)
887 } else if (k
== -ENODATA
) {
888 /* This handles the case where somebody is
889 * connecting from another pid/uid namespace
890 * (e.g. from outside of our container). */
905 local
.vm
.svm_cid
, local
.vm
.svm_port
,
906 remote
.vm
.svm_cid
, remote
.vm
.svm_port
) < 0)
912 assert_not_reached();
919 static void socket_close_fds(Socket
*s
) {
922 LIST_FOREACH(port
, p
, s
->ports
) {
925 was_open
= p
->fd
>= 0;
927 p
->event_source
= sd_event_source_disable_unref(p
->event_source
);
928 p
->fd
= safe_close(p
->fd
);
929 socket_cleanup_fd_list(p
);
931 /* One little note: we should normally not delete any sockets in the file system here! After all some
932 * other process we spawned might still have a reference of this fd and wants to continue to use
933 * it. Therefore we normally delete sockets in the file system before we create a new one, not after we
934 * stopped using one! That all said, if the user explicitly requested this, we'll delete them here
935 * anyway, but only then. */
937 if (!was_open
|| !s
->remove_on_stop
)
943 (void) unlink(p
->path
);
947 (void) mq_unlink(p
->path
);
951 (void) socket_address_unlink(&p
->address
);
959 if (s
->remove_on_stop
)
960 STRV_FOREACH(i
, s
->symlinks
)
963 /* Note that we don't return NULL here, since s has not been freed. */
966 static void socket_apply_socket_options(Socket
*s
, SocketPort
*p
, int fd
) {
974 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_KEEPALIVE
, true);
976 log_unit_warning_errno(UNIT(s
), r
, "SO_KEEPALIVE failed: %m");
979 if (timestamp_is_set(s
->keep_alive_time
)) {
980 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPIDLE
, s
->keep_alive_time
/ USEC_PER_SEC
);
982 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPIDLE failed: %m");
985 if (s
->keep_alive_interval
> 0) {
986 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPINTVL
, s
->keep_alive_interval
/ USEC_PER_SEC
);
988 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPINTVL failed: %m");
991 if (s
->keep_alive_cnt
> 0) {
992 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPCNT
, s
->keep_alive_cnt
);
994 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPCNT failed: %m");
997 if (s
->defer_accept
> 0) {
998 r
= setsockopt_int(fd
, SOL_TCP
, TCP_DEFER_ACCEPT
, s
->defer_accept
/ USEC_PER_SEC
);
1000 log_unit_warning_errno(UNIT(s
), r
, "TCP_DEFER_ACCEPT failed: %m");
1004 if (s
->socket_protocol
== IPPROTO_SCTP
) {
1005 r
= setsockopt_int(fd
, SOL_SCTP
, SCTP_NODELAY
, true);
1007 log_unit_warning_errno(UNIT(s
), r
, "SCTP_NODELAY failed: %m");
1009 r
= setsockopt_int(fd
, SOL_TCP
, TCP_NODELAY
, true);
1011 log_unit_warning_errno(UNIT(s
), r
, "TCP_NODELAY failed: %m");
1016 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_BROADCAST
, true);
1018 log_unit_warning_errno(UNIT(s
), r
, "SO_BROADCAST failed: %m");
1022 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PASSCRED
, true);
1024 log_unit_warning_errno(UNIT(s
), r
, "SO_PASSCRED failed: %m");
1028 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PASSSEC
, true);
1030 log_unit_warning_errno(UNIT(s
), r
, "SO_PASSSEC failed: %m");
1033 if (s
->pass_pktinfo
) {
1034 r
= socket_set_recvpktinfo(fd
, socket_address_family(&p
->address
), true);
1036 log_unit_warning_errno(UNIT(s
), r
, "Failed to enable packet info socket option: %m");
1039 if (s
->timestamping
!= SOCKET_TIMESTAMPING_OFF
) {
1040 r
= setsockopt_int(fd
, SOL_SOCKET
,
1041 s
->timestamping
== SOCKET_TIMESTAMPING_NS
? SO_TIMESTAMPNS
: SO_TIMESTAMP
,
1044 log_unit_warning_errno(UNIT(s
), r
, "Failed to enable timestamping socket option, ignoring: %m");
1047 if (s
->priority
>= 0) {
1048 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PRIORITY
, s
->priority
);
1050 log_unit_warning_errno(UNIT(s
), r
, "SO_PRIORITY failed: %m");
1053 if (s
->receive_buffer
> 0) {
1054 r
= fd_set_rcvbuf(fd
, s
->receive_buffer
, false);
1056 log_unit_full_errno(UNIT(s
), ERRNO_IS_PRIVILEGE(r
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1057 "SO_RCVBUF/SO_RCVBUFFORCE failed: %m");
1060 if (s
->send_buffer
> 0) {
1061 r
= fd_set_sndbuf(fd
, s
->send_buffer
, false);
1063 log_unit_full_errno(UNIT(s
), ERRNO_IS_PRIVILEGE(r
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1064 "SO_SNDBUF/SO_SNDBUFFORCE failed: %m");
1068 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_MARK
, s
->mark
);
1070 log_unit_warning_errno(UNIT(s
), r
, "SO_MARK failed: %m");
1073 if (s
->ip_tos
>= 0) {
1074 r
= setsockopt_int(fd
, IPPROTO_IP
, IP_TOS
, s
->ip_tos
);
1076 log_unit_warning_errno(UNIT(s
), r
, "IP_TOS failed: %m");
1079 if (s
->ip_ttl
>= 0) {
1080 r
= socket_set_ttl(fd
, socket_address_family(&p
->address
), s
->ip_ttl
);
1082 log_unit_warning_errno(UNIT(s
), r
, "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
1085 if (s
->tcp_congestion
)
1086 if (setsockopt(fd
, SOL_TCP
, TCP_CONGESTION
, s
->tcp_congestion
, strlen(s
->tcp_congestion
)+1) < 0)
1087 log_unit_warning_errno(UNIT(s
), errno
, "TCP_CONGESTION failed: %m");
1089 if (s
->smack_ip_in
) {
1090 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_IPIN
, s
->smack_ip_in
);
1092 log_unit_error_errno(UNIT(s
), r
, "mac_smack_apply_ip_in_fd: %m");
1095 if (s
->smack_ip_out
) {
1096 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_IPOUT
, s
->smack_ip_out
);
1098 log_unit_error_errno(UNIT(s
), r
, "mac_smack_apply_ip_out_fd: %m");
1102 static void socket_apply_fifo_options(Socket
*s
, int fd
) {
1108 if (s
->pipe_size
> 0)
1109 if (fcntl(fd
, F_SETPIPE_SZ
, s
->pipe_size
) < 0)
1110 log_unit_warning_errno(UNIT(s
), errno
, "Setting pipe size failed, ignoring: %m");
1113 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_ACCESS
, s
->smack
);
1115 log_unit_error_errno(UNIT(s
), r
, "SMACK relabelling failed, ignoring: %m");
1119 static int fifo_address_create(
1121 mode_t directory_mode
,
1122 mode_t socket_mode
) {
1124 _cleanup_close_
int fd
= -EBADF
;
1131 (void) mkdir_parents_label(path
, directory_mode
);
1133 r
= mac_selinux_create_file_prepare(path
, S_IFIFO
);
1137 /* Enforce the right access mode for the fifo */
1138 old_mask
= umask(~socket_mode
);
1140 /* Include the original umask in our mask */
1141 (void) umask(~socket_mode
| old_mask
);
1143 r
= mkfifo(path
, socket_mode
);
1144 (void) umask(old_mask
);
1146 if (r
< 0 && errno
!= EEXIST
) {
1151 fd
= open(path
, O_RDWR
| O_CLOEXEC
| O_NOCTTY
| O_NONBLOCK
| O_NOFOLLOW
);
1157 mac_selinux_create_file_clear();
1159 if (fstat(fd
, &st
) < 0) {
1164 if (!S_ISFIFO(st
.st_mode
) ||
1165 (st
.st_mode
& 0777) != (socket_mode
& ~old_mask
) ||
1166 st
.st_uid
!= getuid() ||
1167 st
.st_gid
!= getgid()) {
1175 mac_selinux_create_file_clear();
1179 static int special_address_create(const char *path
, bool writable
) {
1180 _cleanup_close_
int fd
= -EBADF
;
1185 fd
= open(path
, (writable
? O_RDWR
: O_RDONLY
)|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
);
1189 if (fstat(fd
, &st
) < 0)
1192 /* Check whether this is a /proc, /sys or /dev file or char device */
1193 if (!S_ISREG(st
.st_mode
) && !S_ISCHR(st
.st_mode
))
1199 static int usbffs_address_create(const char *path
) {
1200 _cleanup_close_
int fd
= -EBADF
;
1205 fd
= open(path
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
);
1209 if (fstat(fd
, &st
) < 0)
1212 /* Check whether this is a regular file (ffs endpoint) */
1213 if (!S_ISREG(st
.st_mode
))
1219 static int mq_address_create(
1225 _cleanup_close_
int fd
= -EBADF
;
1228 struct mq_attr _attr
, *attr
= NULL
;
1232 if (maxmsg
> 0 && msgsize
> 0) {
1233 _attr
= (struct mq_attr
) {
1234 .mq_flags
= O_NONBLOCK
,
1235 .mq_maxmsg
= maxmsg
,
1236 .mq_msgsize
= msgsize
,
1241 /* Enforce the right access mode for the mq */
1242 old_mask
= umask(~mq_mode
);
1244 /* Include the original umask in our mask */
1245 (void) umask(~mq_mode
| old_mask
);
1246 fd
= mq_open(path
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
|O_CREAT
, mq_mode
, attr
);
1247 (void) umask(old_mask
);
1252 if (fstat(fd
, &st
) < 0)
1255 if ((st
.st_mode
& 0777) != (mq_mode
& ~old_mask
) ||
1256 st
.st_uid
!= getuid() ||
1257 st
.st_gid
!= getgid())
1263 static int socket_symlink(Socket
*s
) {
1269 p
= socket_find_symlink_target(s
);
1273 STRV_FOREACH(i
, s
->symlinks
) {
1274 (void) mkdir_parents_label(*i
, s
->directory_mode
);
1276 r
= symlink_idempotent(p
, *i
, false);
1278 if (r
== -EEXIST
&& s
->remove_on_stop
) {
1279 /* If there's already something where we want to create the symlink, and the destructive
1280 * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try
1283 if (unlink(*i
) >= 0)
1284 r
= symlink_idempotent(p
, *i
, false);
1288 log_unit_warning_errno(UNIT(s
), r
, "Failed to create symlink %s %s %s, ignoring: %m",
1289 p
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), *i
);
1295 static int usbffs_write_descs(int fd
, Service
*s
) {
1298 if (!s
->usb_function_descriptors
|| !s
->usb_function_strings
)
1301 r
= copy_file_fd(s
->usb_function_descriptors
, fd
, 0);
1305 return copy_file_fd(s
->usb_function_strings
, fd
, 0);
1308 static int usbffs_select_ep(const struct dirent
*d
) {
1309 return d
->d_name
[0] != '.' && !streq(d
->d_name
, "ep0");
1312 static int usbffs_dispatch_eps(SocketPort
*p
) {
1313 _cleanup_free_
struct dirent
**ent
= NULL
;
1317 r
= scandir(p
->path
, &ent
, usbffs_select_ep
, alphasort
);
1322 p
->auxiliary_fds
= new(int, n
);
1323 if (!p
->auxiliary_fds
) {
1328 p
->n_auxiliary_fds
= n
;
1331 for (size_t i
= 0; i
< n
; ++i
) {
1332 _cleanup_free_
char *ep
= NULL
;
1334 ep
= path_make_absolute(ent
[i
]->d_name
, p
->path
);
1342 r
= usbffs_address_create(ep
);
1346 p
->auxiliary_fds
[k
++] = r
;
1353 close_many(p
->auxiliary_fds
, k
);
1354 p
->auxiliary_fds
= mfree(p
->auxiliary_fds
);
1355 p
->n_auxiliary_fds
= 0;
1358 for (size_t i
= 0; i
< n
; ++i
)
1364 int socket_load_service_unit(Socket
*s
, int cfd
, Unit
**ret
) {
1365 /* Figure out what the unit that will be used to handle the connections on the socket looks like.
1367 * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake
1371 if (UNIT_ISSET(s
->service
)) {
1372 *ret
= UNIT_DEREF(s
->service
);
1379 /* Build the instance name and load the unit */
1380 _cleanup_free_
char *prefix
= NULL
, *instance
= NULL
, *name
= NULL
;
1383 r
= unit_name_to_prefix(UNIT(s
)->id
, &prefix
);
1388 r
= instance_from_socket(cfd
, s
->n_accepted
, &instance
);
1390 if (ERRNO_IS_DISCONNECT(r
))
1391 /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return
1392 * different errors. This connection is over, but the socket unit lives on. */
1393 return log_unit_debug_errno(UNIT(s
), r
,
1394 "Got %s on incoming socket, assuming aborted connection attempt, ignoring.",
1400 /* For accepting sockets, we don't know how the instance will be called until we get a connection and
1401 * can figure out what the peer name is. So let's use "internal" as the instance to make it clear
1402 * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */
1403 r
= unit_name_build(prefix
, instance
?: "internal", ".service", &name
);
1407 return manager_load_unit(UNIT(s
)->manager
, name
, NULL
, NULL
, ret
);
1410 static int socket_determine_selinux_label(Socket
*s
, char **ret
) {
1418 const char *exec_context
;
1419 _cleanup_free_
char *path
= NULL
;
1421 r
= socket_load_service_unit(s
, -1, &service
);
1427 exec_context
= SERVICE(service
)->exec_context
.selinux_context
;
1431 con
= strdup(exec_context
);
1435 *ret
= TAKE_PTR(con
);
1439 c
= SERVICE(service
)->exec_command
[SERVICE_EXEC_START
];
1443 r
= chase(c
->path
, SERVICE(service
)->exec_context
.root_directory
, CHASE_PREFIX_ROOT
, &path
, NULL
);
1447 r
= mac_selinux_get_create_label_from_exe(path
, ret
);
1448 if (IN_SET(r
, -EPERM
, -EOPNOTSUPP
))
1457 static int socket_address_listen_do(
1459 const SocketAddress
*address
,
1460 const char *label
) {
1465 return socket_address_listen(
1467 SOCK_CLOEXEC
|SOCK_NONBLOCK
,
1479 #define log_address_error_errno(u, address, error, fmt) \
1481 _cleanup_free_ char *_t = NULL; \
1483 (void) socket_address_print(address, &_t); \
1484 log_unit_error_errno(u, error, fmt, strna(_t)); \
1487 static int fork_needed(const SocketAddress
*address
, const ExecContext
*context
) {
1493 /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */
1495 if (IN_SET(address
->sockaddr
.sa
.sa_family
, AF_INET
, AF_INET6
)) {
1496 r
= bpf_firewall_supported();
1499 if (r
!= BPF_FIREWALL_UNSUPPORTED
) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */
1503 return exec_needs_network_namespace(context
);
1506 static int socket_address_listen_in_cgroup(
1508 const SocketAddress
*address
,
1509 const char *label
) {
1511 _cleanup_close_pair_
int pair
[2] = PIPE_EBADF
;
1518 /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the
1519 * socket's cgroup and network namespace in which the socket is actually created. This way we ensure
1520 * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and
1523 r
= fork_needed(address
, &s
->exec_context
);
1527 /* Shortcut things... */
1528 fd
= socket_address_listen_do(s
, address
, label
);
1530 return log_address_error_errno(UNIT(s
), address
, fd
, "Failed to create listening socket (%s): %m");
1535 r
= unit_setup_exec_runtime(UNIT(s
));
1537 return log_unit_error_errno(UNIT(s
), r
, "Failed acquire runtime: %m");
1539 if (s
->exec_context
.network_namespace_path
&&
1541 s
->exec_runtime
->shared
&&
1542 s
->exec_runtime
->shared
->netns_storage_socket
[0] >= 0) {
1543 r
= open_shareable_ns_path(s
->exec_runtime
->shared
->netns_storage_socket
, s
->exec_context
.network_namespace_path
, CLONE_NEWNET
);
1545 return log_unit_error_errno(UNIT(s
), r
, "Failed to open network namespace path %s: %m", s
->exec_context
.network_namespace_path
);
1548 if (s
->exec_context
.ipc_namespace_path
&&
1550 s
->exec_runtime
->shared
&&
1551 s
->exec_runtime
->shared
->ipcns_storage_socket
[0] >= 0) {
1552 r
= open_shareable_ns_path(s
->exec_runtime
->shared
->ipcns_storage_socket
, s
->exec_context
.ipc_namespace_path
, CLONE_NEWIPC
);
1554 return log_unit_error_errno(UNIT(s
), r
, "Failed to open IPC namespace path %s: %m", s
->exec_context
.ipc_namespace_path
);
1557 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
|SOCK_CLOEXEC
, 0, pair
) < 0)
1558 return log_unit_error_errno(UNIT(s
), errno
, "Failed to create communication channel: %m");
1560 r
= unit_fork_helper_process(UNIT(s
), "(sd-listen)", &pid
);
1562 return log_unit_error_errno(UNIT(s
), r
, "Failed to fork off listener stub process: %m");
1566 pair
[0] = safe_close(pair
[0]);
1568 if (exec_needs_network_namespace(&s
->exec_context
) &&
1570 s
->exec_runtime
->shared
&&
1571 s
->exec_runtime
->shared
->netns_storage_socket
[0] >= 0) {
1573 if (ns_type_supported(NAMESPACE_NET
)) {
1574 r
= setup_shareable_ns(s
->exec_runtime
->shared
->netns_storage_socket
, CLONE_NEWNET
);
1576 log_unit_error_errno(UNIT(s
), r
, "Failed to join network namespace: %m");
1577 _exit(EXIT_NETWORK
);
1579 } else if (s
->exec_context
.network_namespace_path
) {
1580 log_unit_error(UNIT(s
), "Network namespace path configured but network namespaces not supported.");
1581 _exit(EXIT_NETWORK
);
1583 log_unit_warning(UNIT(s
), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring.");
1586 fd
= socket_address_listen_do(s
, address
, label
);
1588 log_address_error_errno(UNIT(s
), address
, fd
, "Failed to create listening socket (%s): %m");
1589 _exit(EXIT_FAILURE
);
1592 r
= send_one_fd(pair
[1], fd
, 0);
1594 log_address_error_errno(UNIT(s
), address
, r
, "Failed to send listening socket (%s) to parent: %m");
1595 _exit(EXIT_FAILURE
);
1598 _exit(EXIT_SUCCESS
);
1601 pair
[1] = safe_close(pair
[1]);
1602 fd
= receive_one_fd(pair
[0], 0);
1604 /* We synchronously wait for the helper, as it shouldn't be slow */
1605 r
= wait_for_terminate_and_check("(sd-listen)", pid
, WAIT_LOG_ABNORMAL
);
1612 return log_address_error_errno(UNIT(s
), address
, fd
, "Failed to receive listening socket (%s): %m");
1617 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket
*, socket_close_fds
, NULL
);
1619 static int socket_open_fds(Socket
*orig_s
) {
1620 _cleanup_(socket_close_fdsp
) Socket
*s
= orig_s
;
1621 _cleanup_(mac_selinux_freep
) char *label
= NULL
;
1622 bool know_label
= false;
1627 LIST_FOREACH(port
, p
, s
->ports
) {
1637 /* Figure out the label, if we don't it know yet. We do it once for the first
1638 * socket where we need this and remember it for the rest. */
1640 r
= socket_determine_selinux_label(s
, &label
);
1642 return log_unit_error_errno(UNIT(s
), r
, "Failed to determine SELinux label: %m");
1647 /* Apply the socket protocol */
1648 switch (p
->address
.type
) {
1651 case SOCK_SEQPACKET
:
1652 if (s
->socket_protocol
== IPPROTO_SCTP
)
1653 p
->address
.protocol
= s
->socket_protocol
;
1657 if (s
->socket_protocol
== IPPROTO_UDPLITE
)
1658 p
->address
.protocol
= s
->socket_protocol
;
1662 p
->fd
= socket_address_listen_in_cgroup(s
, &p
->address
, label
);
1666 socket_apply_socket_options(s
, p
, p
->fd
);
1670 case SOCKET_SPECIAL
:
1672 p
->fd
= special_address_create(p
->path
, s
->writable
);
1674 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open special file %s: %m", p
->path
);
1679 p
->fd
= fifo_address_create(
1684 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open FIFO %s: %m", p
->path
);
1686 socket_apply_fifo_options(s
, p
->fd
);
1692 p
->fd
= mq_address_create(
1698 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open message queue %s: %m", p
->path
);
1701 case SOCKET_USB_FUNCTION
: {
1702 _cleanup_free_
char *ep
= NULL
;
1704 ep
= path_make_absolute("ep0", p
->path
);
1708 p
->fd
= usbffs_address_create(ep
);
1712 r
= usbffs_write_descs(p
->fd
, SERVICE(UNIT_DEREF(s
->service
)));
1716 r
= usbffs_dispatch_eps(p
);
1723 assert_not_reached();
1731 static void socket_unwatch_fds(Socket
*s
) {
1736 LIST_FOREACH(port
, p
, s
->ports
) {
1740 if (!p
->event_source
)
1743 r
= sd_event_source_set_enabled(p
->event_source
, SD_EVENT_OFF
);
1745 log_unit_debug_errno(UNIT(s
), r
, "Failed to disable event source: %m");
1749 static int socket_watch_fds(Socket
*s
) {
1754 LIST_FOREACH(port
, p
, s
->ports
) {
1758 if (p
->event_source
) {
1759 r
= sd_event_source_set_enabled(p
->event_source
, SD_EVENT_ON
);
1763 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &p
->event_source
, p
->fd
, EPOLLIN
, socket_dispatch_io
, p
);
1767 (void) sd_event_source_set_description(p
->event_source
, "socket-port-io");
1774 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch listening fds: %m");
1775 socket_unwatch_fds(s
);
1785 static int socket_check_open(Socket
*s
) {
1786 bool have_open
= false, have_closed
= false;
1790 LIST_FOREACH(port
, p
, s
->ports
) {
1796 if (have_open
&& have_closed
)
1797 return SOCKET_OPEN_SOME
;
1801 return SOCKET_OPEN_ALL
;
1803 return SOCKET_OPEN_NONE
;
1806 static void socket_set_state(Socket
*s
, SocketState state
) {
1807 SocketState old_state
;
1810 if (s
->state
!= state
)
1811 bus_unit_send_pending_change_signal(UNIT(s
), false);
1813 old_state
= s
->state
;
1821 SOCKET_STOP_PRE_SIGTERM
,
1822 SOCKET_STOP_PRE_SIGKILL
,
1824 SOCKET_FINAL_SIGTERM
,
1825 SOCKET_FINAL_SIGKILL
,
1828 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1829 socket_unwatch_control_pid(s
);
1830 s
->control_command
= NULL
;
1831 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
1834 if (state
!= SOCKET_LISTENING
)
1835 socket_unwatch_fds(s
);
1843 SOCKET_STOP_PRE_SIGTERM
,
1844 SOCKET_STOP_PRE_SIGKILL
,
1846 socket_close_fds(s
);
1848 if (state
!= old_state
)
1849 log_unit_debug(UNIT(s
), "Changed %s -> %s", socket_state_to_string(old_state
), socket_state_to_string(state
));
1851 unit_notify(UNIT(s
), state_translation_table
[old_state
], state_translation_table
[state
], /* reload_success = */ true);
1854 static int socket_coldplug(Unit
*u
) {
1855 Socket
*s
= SOCKET(u
);
1859 assert(s
->state
== SOCKET_DEAD
);
1861 if (s
->deserialized_state
== s
->state
)
1864 if (s
->control_pid
> 0 &&
1865 pid_is_unwaited(s
->control_pid
) &&
1866 IN_SET(s
->deserialized_state
,
1871 SOCKET_STOP_PRE_SIGTERM
,
1872 SOCKET_STOP_PRE_SIGKILL
,
1874 SOCKET_FINAL_SIGTERM
,
1875 SOCKET_FINAL_SIGKILL
,
1878 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1882 r
= socket_arm_timer(s
, usec_add(u
->state_change_timestamp
.monotonic
, s
->timeout_usec
));
1887 if (IN_SET(s
->deserialized_state
,
1893 /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors
1894 * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for
1895 * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open,
1896 * and if there's a mismatch, warn loudly. */
1898 r
= socket_check_open(s
);
1899 if (r
== SOCKET_OPEN_NONE
)
1900 log_unit_warning(UNIT(s
),
1901 "Socket unit configuration has changed while unit has been running, "
1902 "no open socket file descriptor left. "
1903 "The socket unit is not functional until restarted.");
1904 else if (r
== SOCKET_OPEN_SOME
)
1905 log_unit_warning(UNIT(s
),
1906 "Socket unit configuration has changed while unit has been running, "
1907 "and some socket file descriptors have not been opened yet. "
1908 "The socket unit is not fully functional until restarted.");
1911 if (s
->deserialized_state
== SOCKET_LISTENING
) {
1912 r
= socket_watch_fds(s
);
1917 if (!IN_SET(s
->deserialized_state
, SOCKET_DEAD
, SOCKET_FAILED
, SOCKET_CLEANING
))
1918 (void) unit_setup_exec_runtime(u
);
1920 socket_set_state(s
, s
->deserialized_state
);
1924 static int socket_spawn(Socket
*s
, ExecCommand
*c
, pid_t
*_pid
) {
1926 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1927 .flags
= EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
,
1929 .stdout_fd
= -EBADF
,
1930 .stderr_fd
= -EBADF
,
1940 r
= unit_prepare_exec(UNIT(s
));
1944 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
1948 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1952 r
= exec_spawn(UNIT(s
),
1962 r
= unit_watch_pid(UNIT(s
), pid
, true);
1971 static int socket_chown(Socket
*s
, pid_t
*_pid
) {
1975 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
1979 /* We have to resolve the user names out-of-process, hence
1980 * let's fork here. It's messy, but well, what can we do? */
1982 r
= unit_fork_helper_process(UNIT(s
), "(sd-chown)", &pid
);
1986 uid_t uid
= UID_INVALID
;
1987 gid_t gid
= GID_INVALID
;
1991 if (!isempty(s
->user
)) {
1992 const char *user
= s
->user
;
1994 r
= get_user_creds(&user
, &uid
, &gid
, NULL
, NULL
, 0);
1996 log_unit_error_errno(UNIT(s
), r
, "Failed to resolve user %s: %m", user
);
2001 if (!isempty(s
->group
)) {
2002 const char *group
= s
->group
;
2004 r
= get_group_creds(&group
, &gid
, 0);
2006 log_unit_error_errno(UNIT(s
), r
, "Failed to resolve group %s: %m", group
);
2011 LIST_FOREACH(port
, p
, s
->ports
) {
2012 const char *path
= NULL
;
2014 if (p
->type
== SOCKET_SOCKET
)
2015 path
= socket_address_get_path(&p
->address
);
2016 else if (p
->type
== SOCKET_FIFO
)
2022 if (chown(path
, uid
, gid
) < 0) {
2023 log_unit_error_errno(UNIT(s
), errno
, "Failed to chown(): %m");
2028 _exit(EXIT_SUCCESS
);
2031 r
= unit_watch_pid(UNIT(s
), pid
, true);
2039 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
2043 static void socket_enter_dead(Socket
*s
, SocketResult f
) {
2046 if (s
->result
== SOCKET_SUCCESS
)
2049 if (s
->result
== SOCKET_SUCCESS
)
2050 unit_log_success(UNIT(s
));
2052 unit_log_failure(UNIT(s
), socket_result_to_string(s
->result
));
2054 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
2056 socket_set_state(s
, s
->result
!= SOCKET_SUCCESS
? SOCKET_FAILED
: SOCKET_DEAD
);
2058 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2060 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2062 unit_unref_uid_gid(UNIT(s
), true);
2065 static void socket_enter_signal(Socket
*s
, SocketState state
, SocketResult f
);
2067 static void socket_enter_stop_post(Socket
*s
, SocketResult f
) {
2071 if (s
->result
== SOCKET_SUCCESS
)
2074 socket_unwatch_control_pid(s
);
2075 s
->control_command_id
= SOCKET_EXEC_STOP_POST
;
2076 s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_POST
];
2078 if (s
->control_command
) {
2079 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2083 socket_set_state(s
, SOCKET_STOP_POST
);
2085 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_SUCCESS
);
2090 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2091 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_RESOURCES
);
2094 static int state_to_kill_operation(Socket
*s
, SocketState state
) {
2095 if (state
== SOCKET_STOP_PRE_SIGTERM
&& unit_has_job_type(UNIT(s
), JOB_RESTART
))
2096 return KILL_RESTART
;
2098 if (state
== SOCKET_FINAL_SIGTERM
)
2099 return KILL_TERMINATE
;
2104 static void socket_enter_signal(Socket
*s
, SocketState state
, SocketResult f
) {
2109 if (s
->result
== SOCKET_SUCCESS
)
2112 r
= unit_kill_context(
2115 state_to_kill_operation(s
, state
),
2123 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
2127 socket_set_state(s
, state
);
2128 } else if (state
== SOCKET_STOP_PRE_SIGTERM
)
2129 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, SOCKET_SUCCESS
);
2130 else if (state
== SOCKET_STOP_PRE_SIGKILL
)
2131 socket_enter_stop_post(s
, SOCKET_SUCCESS
);
2132 else if (state
== SOCKET_FINAL_SIGTERM
)
2133 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_SUCCESS
);
2135 socket_enter_dead(s
, SOCKET_SUCCESS
);
2140 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2142 if (IN_SET(state
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_STOP_PRE_SIGKILL
))
2143 socket_enter_stop_post(s
, SOCKET_FAILURE_RESOURCES
);
2145 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2148 static void socket_enter_stop_pre(Socket
*s
, SocketResult f
) {
2152 if (s
->result
== SOCKET_SUCCESS
)
2155 socket_unwatch_control_pid(s
);
2156 s
->control_command_id
= SOCKET_EXEC_STOP_PRE
;
2157 s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_PRE
];
2159 if (s
->control_command
) {
2160 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2164 socket_set_state(s
, SOCKET_STOP_PRE
);
2166 socket_enter_stop_post(s
, SOCKET_SUCCESS
);
2171 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-pre' task: %m");
2172 socket_enter_stop_post(s
, SOCKET_FAILURE_RESOURCES
);
2175 static void socket_enter_listening(Socket
*s
) {
2179 if (!s
->accept
&& s
->flush_pending
) {
2180 log_unit_debug(UNIT(s
), "Flushing socket before listening.");
2184 r
= socket_watch_fds(s
);
2186 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch sockets: %m");
2190 socket_set_state(s
, SOCKET_LISTENING
);
2194 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2197 static void socket_enter_start_post(Socket
*s
) {
2201 socket_unwatch_control_pid(s
);
2202 s
->control_command_id
= SOCKET_EXEC_START_POST
;
2203 s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_POST
];
2205 if (s
->control_command
) {
2206 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2208 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2212 socket_set_state(s
, SOCKET_START_POST
);
2214 socket_enter_listening(s
);
2219 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2222 static void socket_enter_start_chown(Socket
*s
) {
2227 r
= socket_open_fds(s
);
2229 log_unit_warning_errno(UNIT(s
), r
, "Failed to listen on sockets: %m");
2233 if (!isempty(s
->user
) || !isempty(s
->group
)) {
2235 socket_unwatch_control_pid(s
);
2236 s
->control_command_id
= SOCKET_EXEC_START_CHOWN
;
2237 s
->control_command
= NULL
;
2239 r
= socket_chown(s
, &s
->control_pid
);
2241 log_unit_warning_errno(UNIT(s
), r
, "Failed to fork 'start-chown' task: %m");
2245 socket_set_state(s
, SOCKET_START_CHOWN
);
2247 socket_enter_start_post(s
);
2252 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2255 static void socket_enter_start_pre(Socket
*s
) {
2259 socket_unwatch_control_pid(s
);
2261 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
);
2263 s
->control_command_id
= SOCKET_EXEC_START_PRE
;
2264 s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_PRE
];
2266 if (s
->control_command
) {
2267 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2269 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2273 socket_set_state(s
, SOCKET_START_PRE
);
2275 socket_enter_start_chown(s
);
2280 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2283 static void flush_ports(Socket
*s
) {
2286 /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy
2289 LIST_FOREACH(port
, p
, s
->ports
) {
2293 (void) flush_accept(p
->fd
);
2294 (void) flush_fd(p
->fd
);
2298 static void socket_enter_running(Socket
*s
, int cfd_in
) {
2299 /* Note that this call takes possession of the connection fd passed. It either has to assign it
2300 * somewhere or close it. */
2301 _cleanup_close_
int cfd
= cfd_in
;
2303 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2308 /* We don't take connections anymore if we are supposed to shut down anyway */
2309 if (unit_stop_pending(UNIT(s
))) {
2311 log_unit_debug(UNIT(s
), "Suppressing connection request since unit stop is scheduled.");
2320 if (!ratelimit_below(&s
->trigger_limit
)) {
2321 log_unit_warning(UNIT(s
), "Trigger limit hit, refusing further activation.");
2322 socket_enter_stop_pre(s
, SOCKET_FAILURE_TRIGGER_LIMIT_HIT
);
2327 bool pending
= false;
2330 /* If there's already a start pending don't bother to do anything */
2331 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_TRIGGERS
)
2332 if (unit_active_or_pending(other
)) {
2338 if (!UNIT_ISSET(s
->service
)) {
2339 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOENT
),
2340 "Service to activate vanished, refusing activation.");
2344 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, UNIT_DEREF(s
->service
), JOB_REPLACE
, NULL
, &error
, NULL
);
2349 socket_set_state(s
, SOCKET_RUNNING
);
2351 _cleanup_(socket_peer_unrefp
) SocketPeer
*p
= NULL
;
2354 if (s
->n_connections
>= s
->max_connections
) {
2355 log_unit_warning(UNIT(s
), "Too many incoming connections (%u), dropping connection.",
2360 if (s
->max_connections_per_source
> 0) {
2361 r
= socket_acquire_peer(s
, cfd
, &p
);
2363 if (ERRNO_IS_DISCONNECT(r
))
2365 /* We didn't have enough resources to acquire peer information, let's fail. */
2368 if (r
> 0 && p
->n_ref
> s
->max_connections_per_source
) {
2369 _cleanup_free_
char *t
= NULL
;
2371 (void) sockaddr_pretty(&p
->peer
.sa
, p
->peer_salen
, true, false, &t
);
2373 log_unit_warning(UNIT(s
),
2374 "Too many incoming connections (%u) from source %s, dropping connection.",
2375 p
->n_ref
, strnull(t
));
2380 r
= socket_load_service_unit(s
, cfd
, &service
);
2382 if (ERRNO_IS_DISCONNECT(r
))
2387 r
= unit_add_two_dependencies(UNIT(s
), UNIT_BEFORE
, UNIT_TRIGGERS
, service
,
2388 false, UNIT_DEPENDENCY_IMPLICIT
);
2394 r
= service_set_socket_fd(SERVICE(service
), cfd
, s
, p
, s
->selinux_context_from_net
);
2396 if (ERRNO_IS_DISCONNECT(r
))
2401 TAKE_FD(cfd
); /* We passed ownership of the fd to the service now. Forget it here. */
2404 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, service
, JOB_REPLACE
, NULL
, &error
, NULL
);
2406 /* We failed to activate the new service, but it still exists. Let's make sure the
2407 * service closes and forgets the connection fd again, immediately. */
2408 service_release_socket_fd(SERVICE(service
));
2412 /* Notify clients about changed counters */
2413 unit_add_to_dbus_queue(UNIT(s
));
2424 if (ERRNO_IS_RESOURCE(r
))
2425 log_unit_warning(UNIT(s
), "Failed to queue service startup job: %s",
2426 bus_error_message(&error
, r
));
2428 log_unit_warning(UNIT(s
), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s",
2429 cfd
>= 0 ? "template" : "non-template",
2430 bus_error_message(&error
, r
));
2432 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2435 static void socket_run_next(Socket
*s
) {
2439 assert(s
->control_command
);
2440 assert(s
->control_command
->command_next
);
2442 socket_unwatch_control_pid(s
);
2444 s
->control_command
= s
->control_command
->command_next
;
2446 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2453 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next task: %m");
2455 if (s
->state
== SOCKET_START_POST
)
2456 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2457 else if (s
->state
== SOCKET_STOP_POST
)
2458 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2460 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_RESOURCES
);
2463 static int socket_start(Unit
*u
) {
2464 Socket
*s
= SOCKET(u
);
2469 /* We cannot fulfill this request right now, try again later
2471 if (IN_SET(s
->state
,
2473 SOCKET_STOP_PRE_SIGKILL
,
2474 SOCKET_STOP_PRE_SIGTERM
,
2476 SOCKET_FINAL_SIGTERM
,
2477 SOCKET_FINAL_SIGKILL
,
2481 /* Already on it! */
2482 if (IN_SET(s
->state
,
2488 /* Cannot run this without the service being around */
2489 if (UNIT_ISSET(s
->service
)) {
2492 service
= SERVICE(UNIT_DEREF(s
->service
));
2494 if (UNIT(service
)->load_state
!= UNIT_LOADED
)
2495 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
), "Socket service %s not loaded, refusing.", UNIT(service
)->id
);
2497 /* If the service is already active we cannot start the
2499 if (!IN_SET(service
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
))
2500 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EBUSY
), "Socket service %s already active, refusing.", UNIT(service
)->id
);
2503 assert(IN_SET(s
->state
, SOCKET_DEAD
, SOCKET_FAILED
));
2505 r
= unit_acquire_invocation_id(u
);
2509 s
->result
= SOCKET_SUCCESS
;
2510 exec_command_reset_status_list_array(s
->exec_command
, _SOCKET_EXEC_COMMAND_MAX
);
2512 u
->reset_accounting
= true;
2514 socket_enter_start_pre(s
);
2518 static int socket_stop(Unit
*u
) {
2519 Socket
*s
= SOCKET(u
);
2524 if (IN_SET(s
->state
,
2526 SOCKET_STOP_PRE_SIGTERM
,
2527 SOCKET_STOP_PRE_SIGKILL
,
2529 SOCKET_FINAL_SIGTERM
,
2530 SOCKET_FINAL_SIGKILL
))
2533 /* If there's already something running we go directly into
2535 if (IN_SET(s
->state
,
2538 SOCKET_START_POST
)) {
2539 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_SUCCESS
);
2543 /* If we are currently cleaning, then abort it, brutally. */
2544 if (s
->state
== SOCKET_CLEANING
) {
2545 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_SUCCESS
);
2549 assert(IN_SET(s
->state
, SOCKET_LISTENING
, SOCKET_RUNNING
));
2551 socket_enter_stop_pre(s
, SOCKET_SUCCESS
);
2555 static int socket_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2556 Socket
*s
= SOCKET(u
);
2563 (void) serialize_item(f
, "state", socket_state_to_string(s
->state
));
2564 (void) serialize_item(f
, "result", socket_result_to_string(s
->result
));
2565 (void) serialize_item_format(f
, "n-accepted", "%u", s
->n_accepted
);
2566 (void) serialize_item_format(f
, "n-refused", "%u", s
->n_refused
);
2568 if (s
->control_pid
> 0)
2569 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2571 if (s
->control_command_id
>= 0)
2572 (void) serialize_item(f
, "control-command", socket_exec_command_to_string(s
->control_command_id
));
2574 LIST_FOREACH(port
, p
, s
->ports
) {
2580 copy
= fdset_put_dup(fds
, p
->fd
);
2582 return log_unit_warning_errno(u
, copy
, "Failed to serialize socket fd: %m");
2584 if (p
->type
== SOCKET_SOCKET
) {
2585 _cleanup_free_
char *t
= NULL
;
2587 r
= socket_address_print(&p
->address
, &t
);
2589 return log_unit_error_errno(u
, r
, "Failed to format socket address: %m");
2591 if (socket_address_family(&p
->address
) == AF_NETLINK
)
2592 (void) serialize_item_format(f
, "netlink", "%i %s", copy
, t
);
2594 (void) serialize_item_format(f
, "socket", "%i %i %s", copy
, p
->address
.type
, t
);
2595 } else if (p
->type
== SOCKET_SPECIAL
)
2596 (void) serialize_item_format(f
, "special", "%i %s", copy
, p
->path
);
2597 else if (p
->type
== SOCKET_MQUEUE
)
2598 (void) serialize_item_format(f
, "mqueue", "%i %s", copy
, p
->path
);
2599 else if (p
->type
== SOCKET_USB_FUNCTION
)
2600 (void) serialize_item_format(f
, "ffs", "%i %s", copy
, p
->path
);
2602 assert(p
->type
== SOCKET_FIFO
);
2603 (void) serialize_item_format(f
, "fifo", "%i %s", copy
, p
->path
);
2610 static int socket_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2611 Socket
*s
= SOCKET(u
);
2618 if (streq(key
, "state")) {
2621 state
= socket_state_from_string(value
);
2623 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2625 s
->deserialized_state
= state
;
2626 } else if (streq(key
, "result")) {
2629 f
= socket_result_from_string(value
);
2631 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2632 else if (f
!= SOCKET_SUCCESS
)
2635 } else if (streq(key
, "n-accepted")) {
2638 if (safe_atou(value
, &k
) < 0)
2639 log_unit_debug(u
, "Failed to parse n-accepted value: %s", value
);
2642 } else if (streq(key
, "n-refused")) {
2645 if (safe_atou(value
, &k
) < 0)
2646 log_unit_debug(u
, "Failed to parse n-refused value: %s", value
);
2649 } else if (streq(key
, "control-pid")) {
2652 if (parse_pid(value
, &pid
) < 0)
2653 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2655 s
->control_pid
= pid
;
2656 } else if (streq(key
, "control-command")) {
2657 SocketExecCommand id
;
2659 id
= socket_exec_command_from_string(value
);
2661 log_unit_debug(u
, "Failed to parse exec-command value: %s", value
);
2663 s
->control_command_id
= id
;
2664 s
->control_command
= s
->exec_command
[id
];
2666 } else if (streq(key
, "fifo")) {
2667 _cleanup_free_
char *fdv
= NULL
;
2671 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2673 log_unit_debug(u
, "Failed to parse fifo value: %s", value
);
2678 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2679 log_unit_debug(u
, "Invalid fifo value: %s", fdv
);
2683 LIST_FOREACH(port
, p
, s
->ports
)
2685 p
->type
== SOCKET_FIFO
&&
2686 path_equal_or_inode_same(p
->path
, value
, 0)) {
2687 p
->fd
= fdset_remove(fds
, fd
);
2692 log_unit_debug(u
, "No matching fifo socket found: %s", value
);
2694 } else if (streq(key
, "special")) {
2695 _cleanup_free_
char *fdv
= NULL
;
2699 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2701 log_unit_debug(u
, "Failed to parse special value: %s", value
);
2706 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2707 log_unit_debug(u
, "Invalid special value: %s", fdv
);
2711 LIST_FOREACH(port
, p
, s
->ports
)
2713 p
->type
== SOCKET_SPECIAL
&&
2714 path_equal_or_inode_same(p
->path
, value
, 0)) {
2715 p
->fd
= fdset_remove(fds
, fd
);
2720 log_unit_debug(u
, "No matching special socket found: %s", value
);
2722 } else if (streq(key
, "mqueue")) {
2723 _cleanup_free_
char *fdv
= NULL
;
2727 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2729 log_unit_debug(u
, "Failed to parse mqueue value: %s", value
);
2734 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2735 log_unit_debug(u
, "Invalid mqueue value: %s", fdv
);
2739 LIST_FOREACH(port
, p
, s
->ports
)
2741 p
->type
== SOCKET_MQUEUE
&&
2742 streq(p
->path
, value
)) {
2743 p
->fd
= fdset_remove(fds
, fd
);
2748 log_unit_debug(u
, "No matching mqueue socket found: %s", value
);
2750 } else if (streq(key
, "socket")) {
2751 _cleanup_free_
char *fdv
= NULL
, *typev
= NULL
;
2755 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2757 log_unit_debug(u
, "Failed to parse socket fd from value: %s", value
);
2762 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2763 log_unit_debug(u
, "Invalid socket fd: %s", fdv
);
2767 r
= extract_first_word(&value
, &typev
, NULL
, 0);
2769 log_unit_debug(u
, "Failed to parse socket type from value: %s", value
);
2773 if (safe_atoi(typev
, &type
) < 0 || type
< 0) {
2774 log_unit_debug(u
, "Invalid socket type: %s", typev
);
2778 LIST_FOREACH(port
, p
, s
->ports
)
2780 socket_address_is(&p
->address
, value
, type
)) {
2781 p
->fd
= fdset_remove(fds
, fd
);
2786 log_unit_debug(u
, "No matching %s socket found: %s",
2787 socket_address_type_to_string(type
), value
);
2789 } else if (streq(key
, "netlink")) {
2790 _cleanup_free_
char *fdv
= NULL
;
2794 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2796 log_unit_debug(u
, "Failed to parse socket value: %s", value
);
2801 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2802 log_unit_debug(u
, "Invalid socket value: %s", fdv
);
2806 LIST_FOREACH(port
, p
, s
->ports
)
2808 socket_address_is_netlink(&p
->address
, value
)) {
2809 p
->fd
= fdset_remove(fds
, fd
);
2814 log_unit_debug(u
, "No matching netlink socket found: %s", value
);
2816 } else if (streq(key
, "ffs")) {
2817 _cleanup_free_
char *fdv
= NULL
;
2821 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2823 log_unit_debug(u
, "Failed to parse ffs value: %s", value
);
2828 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2829 log_unit_debug(u
, "Invalid ffs value: %s", fdv
);
2833 LIST_FOREACH(port
, p
, s
->ports
)
2835 p
->type
== SOCKET_USB_FUNCTION
&&
2836 path_equal_or_inode_same(p
->path
, value
, 0)) {
2837 p
->fd
= fdset_remove(fds
, fd
);
2842 log_unit_debug(u
, "No matching ffs socket found: %s", value
);
2845 log_unit_debug(UNIT(s
), "Unknown serialization key: %s", key
);
2850 static void socket_distribute_fds(Unit
*u
, FDSet
*fds
) {
2851 Socket
*s
= SOCKET(u
);
2855 LIST_FOREACH(port
, p
, s
->ports
) {
2858 if (p
->type
!= SOCKET_SOCKET
)
2864 FDSET_FOREACH(fd
, fds
) {
2865 if (socket_address_matches_fd(&p
->address
, fd
)) {
2866 p
->fd
= fdset_remove(fds
, fd
);
2867 s
->deserialized_state
= SOCKET_LISTENING
;
2874 static UnitActiveState
socket_active_state(Unit
*u
) {
2877 return state_translation_table
[SOCKET(u
)->state
];
2880 static const char *socket_sub_state_to_string(Unit
*u
) {
2883 return socket_state_to_string(SOCKET(u
)->state
);
2886 const char* socket_port_type_to_string(SocketPort
*p
) {
2894 switch (p
->address
.type
) {
2902 case SOCK_SEQPACKET
:
2903 return "SequentialPacket";
2906 if (socket_address_family(&p
->address
) == AF_NETLINK
)
2914 case SOCKET_SPECIAL
:
2918 return "MessageQueue";
2923 case SOCKET_USB_FUNCTION
:
2924 return "USBFunction";
2931 SocketType
socket_port_type_from_string(const char *s
) {
2934 if (STR_IN_SET(s
, "Stream", "Datagram", "SequentialPacket", "Netlink"))
2935 return SOCKET_SOCKET
;
2936 else if (streq(s
, "Special"))
2937 return SOCKET_SPECIAL
;
2938 else if (streq(s
, "MessageQueue"))
2939 return SOCKET_MQUEUE
;
2940 else if (streq(s
, "FIFO"))
2942 else if (streq(s
, "USBFunction"))
2943 return SOCKET_USB_FUNCTION
;
2945 return _SOCKET_TYPE_INVALID
;
2948 static bool socket_may_gc(Unit
*u
) {
2949 Socket
*s
= SOCKET(u
);
2953 return s
->n_connections
== 0;
2956 static int socket_accept_do(Socket
*s
, int fd
) {
2962 cfd
= accept4(fd
, NULL
, NULL
, SOCK_NONBLOCK
|SOCK_CLOEXEC
);
2964 /* Convert transient network errors into clean and well-defined EAGAIN */
2965 return ERRNO_IS_ACCEPT_AGAIN(errno
) ? -EAGAIN
: -errno
;
2970 static int socket_accept_in_cgroup(Socket
*s
, SocketPort
*p
, int fd
) {
2971 _cleanup_close_pair_
int pair
[2] = PIPE_EBADF
;
2979 /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any
2980 * connection socket is also properly associated with the cgroup. */
2982 if (!IN_SET(p
->address
.sockaddr
.sa
.sa_family
, AF_INET
, AF_INET6
))
2985 r
= bpf_firewall_supported();
2988 if (r
== BPF_FIREWALL_UNSUPPORTED
)
2991 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
|SOCK_CLOEXEC
, 0, pair
) < 0)
2992 return log_unit_error_errno(UNIT(s
), errno
, "Failed to create communication channel: %m");
2994 r
= unit_fork_helper_process(UNIT(s
), "(sd-accept)", &pid
);
2996 return log_unit_error_errno(UNIT(s
), r
, "Failed to fork off accept stub process: %m");
3000 pair
[0] = safe_close(pair
[0]);
3002 cfd
= socket_accept_do(s
, fd
);
3003 if (cfd
== -EAGAIN
) /* spurious accept() */
3004 _exit(EXIT_SUCCESS
);
3006 log_unit_error_errno(UNIT(s
), cfd
, "Failed to accept connection socket: %m");
3007 _exit(EXIT_FAILURE
);
3010 r
= send_one_fd(pair
[1], cfd
, 0);
3012 log_unit_error_errno(UNIT(s
), r
, "Failed to send connection socket to parent: %m");
3013 _exit(EXIT_FAILURE
);
3016 _exit(EXIT_SUCCESS
);
3019 pair
[1] = safe_close(pair
[1]);
3020 cfd
= receive_one_fd(pair
[0], 0);
3022 /* We synchronously wait for the helper, as it shouldn't be slow */
3023 r
= wait_for_terminate_and_check("(sd-accept)", pid
, WAIT_LOG_ABNORMAL
);
3029 /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS
3030 * this is a spurious accept(), let's convert that back to EAGAIN here. */
3034 return log_unit_error_errno(UNIT(s
), cfd
, "Failed to receive connection socket: %m");
3039 cfd
= socket_accept_do(s
, fd
);
3040 if (cfd
== -EAGAIN
) /* spurious accept(), skip it silently */
3043 return log_unit_error_errno(UNIT(s
), cfd
, "Failed to accept connection socket: %m");
3048 static int socket_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
3049 SocketPort
*p
= ASSERT_PTR(userdata
);
3054 if (p
->socket
->state
!= SOCKET_LISTENING
)
3057 log_unit_debug(UNIT(p
->socket
), "Incoming traffic");
3059 if (revents
!= EPOLLIN
) {
3060 if (revents
& EPOLLHUP
)
3061 log_unit_error(UNIT(p
->socket
), "Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.");
3063 log_unit_error(UNIT(p
->socket
), "Got unexpected poll event (0x%x) on socket.", revents
);
3067 if (p
->socket
->accept
&&
3068 p
->type
== SOCKET_SOCKET
&&
3069 socket_address_can_accept(&p
->address
)) {
3071 cfd
= socket_accept_in_cgroup(p
->socket
, p
, fd
);
3072 if (cfd
== -EAGAIN
) /* Spurious accept() */
3077 socket_apply_socket_options(p
->socket
, p
, cfd
);
3080 socket_enter_running(p
->socket
, cfd
);
3084 socket_enter_stop_pre(p
->socket
, SOCKET_FAILURE_RESOURCES
);
3088 static void socket_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3089 Socket
*s
= SOCKET(u
);
3095 if (pid
!= s
->control_pid
)
3100 if (is_clean_exit(code
, status
, EXIT_CLEAN_COMMAND
, NULL
))
3102 else if (code
== CLD_EXITED
)
3103 f
= SOCKET_FAILURE_EXIT_CODE
;
3104 else if (code
== CLD_KILLED
)
3105 f
= SOCKET_FAILURE_SIGNAL
;
3106 else if (code
== CLD_DUMPED
)
3107 f
= SOCKET_FAILURE_CORE_DUMP
;
3109 assert_not_reached();
3111 if (s
->control_command
) {
3112 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3114 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3118 unit_log_process_exit(
3121 socket_exec_command_to_string(s
->control_command_id
),
3122 f
== SOCKET_SUCCESS
,
3125 if (s
->result
== SOCKET_SUCCESS
)
3128 if (s
->control_command
&&
3129 s
->control_command
->command_next
&&
3130 f
== SOCKET_SUCCESS
) {
3132 log_unit_debug(u
, "Running next command for state %s", socket_state_to_string(s
->state
));
3135 s
->control_command
= NULL
;
3136 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
3138 /* No further commands for this step, so let's figure
3139 * out what to do next */
3141 log_unit_debug(u
, "Got final SIGCHLD for state %s", socket_state_to_string(s
->state
));
3145 case SOCKET_START_PRE
:
3146 if (f
== SOCKET_SUCCESS
)
3147 socket_enter_start_chown(s
);
3149 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, f
);
3152 case SOCKET_START_CHOWN
:
3153 if (f
== SOCKET_SUCCESS
)
3154 socket_enter_start_post(s
);
3156 socket_enter_stop_pre(s
, f
);
3159 case SOCKET_START_POST
:
3160 if (f
== SOCKET_SUCCESS
)
3161 socket_enter_listening(s
);
3163 socket_enter_stop_pre(s
, f
);
3166 case SOCKET_STOP_PRE
:
3167 case SOCKET_STOP_PRE_SIGTERM
:
3168 case SOCKET_STOP_PRE_SIGKILL
:
3169 socket_enter_stop_post(s
, f
);
3172 case SOCKET_STOP_POST
:
3173 case SOCKET_FINAL_SIGTERM
:
3174 case SOCKET_FINAL_SIGKILL
:
3175 socket_enter_dead(s
, f
);
3178 case SOCKET_CLEANING
:
3180 if (s
->clean_result
== SOCKET_SUCCESS
)
3181 s
->clean_result
= f
;
3183 socket_enter_dead(s
, SOCKET_SUCCESS
);
3187 assert_not_reached();
3191 /* Notify clients about changed exit status */
3192 unit_add_to_dbus_queue(u
);
3195 static int socket_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3196 Socket
*s
= SOCKET(userdata
);
3199 assert(s
->timer_event_source
== source
);
3203 case SOCKET_START_PRE
:
3204 log_unit_warning(UNIT(s
), "Starting timed out. Terminating.");
3205 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3208 case SOCKET_START_CHOWN
:
3209 case SOCKET_START_POST
:
3210 log_unit_warning(UNIT(s
), "Starting timed out. Stopping.");
3211 socket_enter_stop_pre(s
, SOCKET_FAILURE_TIMEOUT
);
3214 case SOCKET_STOP_PRE
:
3215 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3216 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3219 case SOCKET_STOP_PRE_SIGTERM
:
3220 if (s
->kill_context
.send_sigkill
) {
3221 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3222 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, SOCKET_FAILURE_TIMEOUT
);
3224 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL. Ignoring.");
3225 socket_enter_stop_post(s
, SOCKET_FAILURE_TIMEOUT
);
3229 case SOCKET_STOP_PRE_SIGKILL
:
3230 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3231 socket_enter_stop_post(s
, SOCKET_FAILURE_TIMEOUT
);
3234 case SOCKET_STOP_POST
:
3235 log_unit_warning(UNIT(s
), "Stopping timed out (2). Terminating.");
3236 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3239 case SOCKET_FINAL_SIGTERM
:
3240 if (s
->kill_context
.send_sigkill
) {
3241 log_unit_warning(UNIT(s
), "Stopping timed out (2). Killing.");
3242 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_FAILURE_TIMEOUT
);
3244 log_unit_warning(UNIT(s
), "Stopping timed out (2). Skipping SIGKILL. Ignoring.");
3245 socket_enter_dead(s
, SOCKET_FAILURE_TIMEOUT
);
3249 case SOCKET_FINAL_SIGKILL
:
3250 log_unit_warning(UNIT(s
), "Still around after SIGKILL (2). Entering failed mode.");
3251 socket_enter_dead(s
, SOCKET_FAILURE_TIMEOUT
);
3254 case SOCKET_CLEANING
:
3255 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3257 if (s
->clean_result
== SOCKET_SUCCESS
)
3258 s
->clean_result
= SOCKET_FAILURE_TIMEOUT
;
3260 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, 0);
3264 assert_not_reached();
3270 int socket_collect_fds(Socket
*s
, int **fds
) {
3271 size_t k
= 0, n
= 0;
3277 /* Called from the service code for requesting our fds */
3279 LIST_FOREACH(port
, p
, s
->ports
) {
3282 n
+= p
->n_auxiliary_fds
;
3294 LIST_FOREACH(port
, p
, s
->ports
) {
3297 for (size_t i
= 0; i
< p
->n_auxiliary_fds
; ++i
)
3298 rfds
[k
++] = p
->auxiliary_fds
[i
];
3307 static void socket_reset_failed(Unit
*u
) {
3308 Socket
*s
= SOCKET(u
);
3312 if (s
->state
== SOCKET_FAILED
)
3313 socket_set_state(s
, SOCKET_DEAD
);
3315 s
->result
= SOCKET_SUCCESS
;
3316 s
->clean_result
= SOCKET_SUCCESS
;
3319 void socket_connection_unref(Socket
*s
) {
3322 /* The service is dead. Yay!
3324 * This is strictly for one-instance-per-connection
3327 assert(s
->n_connections
> 0);
3330 log_unit_debug(UNIT(s
), "One connection closed, %u left.", s
->n_connections
);
3333 static void socket_trigger_notify(Unit
*u
, Unit
*other
) {
3334 Socket
*s
= SOCKET(u
);
3339 /* Filter out invocations with bogus state */
3340 assert(UNIT_IS_LOAD_COMPLETE(other
->load_state
));
3341 assert(other
->type
== UNIT_SERVICE
);
3343 /* Don't propagate state changes from the service if we are already down */
3344 if (!IN_SET(s
->state
, SOCKET_RUNNING
, SOCKET_LISTENING
))
3347 /* We don't care for the service state if we are in Accept=yes mode */
3351 /* Propagate start limit hit state */
3352 if (other
->start_limit_hit
) {
3353 socket_enter_stop_pre(s
, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT
);
3357 /* Don't propagate anything if there's still a job queued */
3361 if (IN_SET(SERVICE(other
)->state
,
3362 SERVICE_DEAD
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED
, SERVICE_FAILED_BEFORE_AUTO_RESTART
,
3363 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
3364 SERVICE_AUTO_RESTART
))
3365 socket_enter_listening(s
);
3367 if (SERVICE(other
)->state
== SERVICE_RUNNING
)
3368 socket_set_state(s
, SOCKET_RUNNING
);
3371 static int socket_kill(Unit
*u
, KillWho who
, int signo
, int code
, int value
, sd_bus_error
*error
) {
3372 return unit_kill_common(u
, who
, signo
, code
, value
, -1, SOCKET(u
)->control_pid
, error
);
3375 static int socket_get_timeout(Unit
*u
, usec_t
*timeout
) {
3376 Socket
*s
= SOCKET(u
);
3380 if (!s
->timer_event_source
)
3383 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3386 if (t
== USEC_INFINITY
)
3393 char *socket_fdname(Socket
*s
) {
3396 /* Returns the name to use for $LISTEN_NAMES. If the user
3397 * didn't specify anything specifically, use the socket unit's
3398 * name as fallback. */
3400 return s
->fdname
?: UNIT(s
)->id
;
3403 static int socket_control_pid(Unit
*u
) {
3404 Socket
*s
= SOCKET(u
);
3408 return s
->control_pid
;
3411 static int socket_clean(Unit
*u
, ExecCleanMask mask
) {
3412 _cleanup_strv_free_
char **l
= NULL
;
3413 Socket
*s
= SOCKET(u
);
3419 if (s
->state
!= SOCKET_DEAD
)
3422 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
3426 if (strv_isempty(l
))
3429 socket_unwatch_control_pid(s
);
3430 s
->clean_result
= SOCKET_SUCCESS
;
3431 s
->control_command
= NULL
;
3432 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
3434 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
3438 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
3442 socket_set_state(s
, SOCKET_CLEANING
);
3447 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
3448 s
->clean_result
= SOCKET_FAILURE_RESOURCES
;
3449 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
3453 static int socket_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
3454 Socket
*s
= SOCKET(u
);
3458 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
3461 static int socket_can_start(Unit
*u
) {
3462 Socket
*s
= SOCKET(u
);
3467 r
= unit_test_start_limit(u
);
3469 socket_enter_dead(s
, SOCKET_FAILURE_START_LIMIT_HIT
);
3476 static const char* const socket_exec_command_table
[_SOCKET_EXEC_COMMAND_MAX
] = {
3477 [SOCKET_EXEC_START_PRE
] = "ExecStartPre",
3478 [SOCKET_EXEC_START_CHOWN
] = "ExecStartChown",
3479 [SOCKET_EXEC_START_POST
] = "ExecStartPost",
3480 [SOCKET_EXEC_STOP_PRE
] = "ExecStopPre",
3481 [SOCKET_EXEC_STOP_POST
] = "ExecStopPost"
3484 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command
, SocketExecCommand
);
3486 static const char* const socket_result_table
[_SOCKET_RESULT_MAX
] = {
3487 [SOCKET_SUCCESS
] = "success",
3488 [SOCKET_FAILURE_RESOURCES
] = "resources",
3489 [SOCKET_FAILURE_TIMEOUT
] = "timeout",
3490 [SOCKET_FAILURE_EXIT_CODE
] = "exit-code",
3491 [SOCKET_FAILURE_SIGNAL
] = "signal",
3492 [SOCKET_FAILURE_CORE_DUMP
] = "core-dump",
3493 [SOCKET_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
3494 [SOCKET_FAILURE_TRIGGER_LIMIT_HIT
] = "trigger-limit-hit",
3495 [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT
] = "service-start-limit-hit"
3498 DEFINE_STRING_TABLE_LOOKUP(socket_result
, SocketResult
);
3500 static const char* const socket_timestamping_table
[_SOCKET_TIMESTAMPING_MAX
] = {
3501 [SOCKET_TIMESTAMPING_OFF
] = "off",
3502 [SOCKET_TIMESTAMPING_US
] = "us",
3503 [SOCKET_TIMESTAMPING_NS
] = "ns",
3506 DEFINE_STRING_TABLE_LOOKUP(socket_timestamping
, SocketTimestamping
);
3508 SocketTimestamping
socket_timestamping_from_string_harder(const char *p
) {
3509 SocketTimestamping t
;
3513 return _SOCKET_TIMESTAMPING_INVALID
;
3515 t
= socket_timestamping_from_string(p
);
3519 /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here,
3521 if (streq(p
, "nsec"))
3522 return SOCKET_TIMESTAMPING_NS
;
3523 if (STR_IN_SET(p
, "usec", "µs", "μs")) /* Accept both small greek letter mu + micro sign unicode codepoints */
3524 return SOCKET_TIMESTAMPING_US
;
3526 r
= parse_boolean(p
);
3528 return _SOCKET_TIMESTAMPING_INVALID
;
3530 return r
? SOCKET_TIMESTAMPING_NS
: SOCKET_TIMESTAMPING_OFF
; /* If boolean yes, default to ns accuracy */
3533 const UnitVTable socket_vtable
= {
3534 .object_size
= sizeof(Socket
),
3535 .exec_context_offset
= offsetof(Socket
, exec_context
),
3536 .cgroup_context_offset
= offsetof(Socket
, cgroup_context
),
3537 .kill_context_offset
= offsetof(Socket
, kill_context
),
3538 .exec_runtime_offset
= offsetof(Socket
, exec_runtime
),
3544 .private_section
= "Socket",
3546 .can_transient
= true,
3547 .can_trigger
= true,
3550 .init
= socket_init
,
3551 .done
= socket_done
,
3552 .load
= socket_load
,
3554 .coldplug
= socket_coldplug
,
3556 .dump
= socket_dump
,
3558 .start
= socket_start
,
3559 .stop
= socket_stop
,
3561 .kill
= socket_kill
,
3562 .clean
= socket_clean
,
3563 .can_clean
= socket_can_clean
,
3565 .get_timeout
= socket_get_timeout
,
3567 .serialize
= socket_serialize
,
3568 .deserialize_item
= socket_deserialize_item
,
3569 .distribute_fds
= socket_distribute_fds
,
3571 .active_state
= socket_active_state
,
3572 .sub_state_to_string
= socket_sub_state_to_string
,
3574 .will_restart
= unit_will_restart_default
,
3576 .may_gc
= socket_may_gc
,
3578 .sigchld_event
= socket_sigchld_event
,
3580 .trigger_notify
= socket_trigger_notify
,
3582 .reset_failed
= socket_reset_failed
,
3584 .control_pid
= socket_control_pid
,
3586 .bus_set_property
= bus_socket_set_property
,
3587 .bus_commit_properties
= bus_socket_commit_properties
,
3589 .status_message_formats
= {
3590 .finished_start_job
= {
3591 [JOB_DONE
] = "Listening on %s.",
3592 [JOB_FAILED
] = "Failed to listen on %s.",
3593 [JOB_TIMEOUT
] = "Timed out starting %s.",
3595 .finished_stop_job
= {
3596 [JOB_DONE
] = "Closed %s.",
3597 [JOB_FAILED
] = "Failed stopping %s.",
3598 [JOB_TIMEOUT
] = "Timed out stopping %s.",
3602 .can_start
= socket_can_start
,