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
->defaults
.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
->defaults
.std_output
;
98 s
->exec_context
.std_error
= u
->manager
->defaults
.std_error
;
100 s
->control_pid
= PIDREF_NULL
;
101 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
103 s
->trigger_limit
.interval
= USEC_INFINITY
;
104 s
->trigger_limit
.burst
= UINT_MAX
;
106 s
->poll_limit_interval
= USEC_INFINITY
;
107 s
->poll_limit_burst
= UINT_MAX
;
110 static void socket_unwatch_control_pid(Socket
*s
) {
113 if (!pidref_is_set(&s
->control_pid
))
116 unit_unwatch_pid(UNIT(s
), s
->control_pid
.pid
);
117 pidref_done(&s
->control_pid
);
120 static void socket_cleanup_fd_list(SocketPort
*p
) {
123 close_many(p
->auxiliary_fds
, p
->n_auxiliary_fds
);
124 p
->auxiliary_fds
= mfree(p
->auxiliary_fds
);
125 p
->n_auxiliary_fds
= 0;
128 SocketPort
*socket_port_free(SocketPort
*p
) {
132 sd_event_source_unref(p
->event_source
);
134 socket_cleanup_fd_list(p
);
141 void socket_free_ports(Socket
*s
) {
144 LIST_CLEAR(port
, s
->ports
, socket_port_free
);
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 * For the poll limit we follow a similar rule, but use 3/4th of the trigger limit parameters, to
316 * trigger this earlier. */
318 if (s
->trigger_limit
.interval
== USEC_INFINITY
)
319 s
->trigger_limit
.interval
= 2 * USEC_PER_SEC
;
320 if (s
->trigger_limit
.burst
== UINT_MAX
)
321 s
->trigger_limit
.burst
= s
->accept
? 200 : 20;
323 if (s
->poll_limit_interval
== USEC_INFINITY
)
324 s
->poll_limit_interval
= 2 * USEC_PER_SEC
;
325 if (s
->poll_limit_burst
== UINT_MAX
)
326 s
->poll_limit_burst
= s
->accept
? 150 : 15;
328 if (have_non_accept_socket(s
)) {
330 if (!UNIT_DEREF(s
->service
)) {
333 r
= unit_load_related_unit(u
, ".service", &x
);
337 unit_ref_set(&s
->service
, u
, x
);
340 r
= unit_add_two_dependencies(u
, UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT_DEREF(s
->service
), true, UNIT_DEPENDENCY_IMPLICIT
);
345 r
= socket_add_mount_dependencies(s
);
349 r
= socket_add_device_dependencies(s
);
353 r
= unit_patch_contexts(u
);
357 if (socket_has_exec(s
)) {
358 r
= unit_add_exec_dependencies(u
, &s
->exec_context
);
363 r
= unit_set_default_slice(u
);
367 r
= socket_add_default_dependencies(s
);
374 static const char *socket_find_symlink_target(Socket
*s
) {
375 const char *found
= NULL
;
377 LIST_FOREACH(port
, p
, s
->ports
) {
378 const char *f
= NULL
;
387 f
= socket_address_get_path(&p
->address
);
405 static int socket_verify(Socket
*s
) {
407 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
410 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing.");
412 if (s
->accept
&& have_non_accept_socket(s
))
413 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing.");
415 if (s
->accept
&& s
->max_connections
<= 0)
416 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "MaxConnection= setting too small. Refusing.");
418 if (s
->accept
&& UNIT_DEREF(s
->service
))
419 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Explicit service configuration for accepting socket units not supported. Refusing.");
421 if (s
->exec_context
.pam_name
&& s
->kill_context
.kill_mode
!= KILL_CONTROL_GROUP
)
422 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing.");
424 if (!strv_isempty(s
->symlinks
) && !socket_find_symlink_target(s
))
425 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.");
430 static void peer_address_hash_func(const SocketPeer
*s
, struct siphash
*state
) {
433 if (s
->peer
.sa
.sa_family
== AF_INET
)
434 siphash24_compress(&s
->peer
.in
.sin_addr
, sizeof(s
->peer
.in
.sin_addr
), state
);
435 else if (s
->peer
.sa
.sa_family
== AF_INET6
)
436 siphash24_compress(&s
->peer
.in6
.sin6_addr
, sizeof(s
->peer
.in6
.sin6_addr
), state
);
437 else if (s
->peer
.sa
.sa_family
== AF_VSOCK
)
438 siphash24_compress(&s
->peer
.vm
.svm_cid
, sizeof(s
->peer
.vm
.svm_cid
), state
);
440 assert_not_reached();
443 static int peer_address_compare_func(const SocketPeer
*x
, const SocketPeer
*y
) {
446 r
= CMP(x
->peer
.sa
.sa_family
, y
->peer
.sa
.sa_family
);
450 switch (x
->peer
.sa
.sa_family
) {
452 return memcmp(&x
->peer
.in
.sin_addr
, &y
->peer
.in
.sin_addr
, sizeof(x
->peer
.in
.sin_addr
));
454 return memcmp(&x
->peer
.in6
.sin6_addr
, &y
->peer
.in6
.sin6_addr
, sizeof(x
->peer
.in6
.sin6_addr
));
456 return CMP(x
->peer
.vm
.svm_cid
, y
->peer
.vm
.svm_cid
);
458 assert_not_reached();
461 DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops
, SocketPeer
, peer_address_hash_func
, peer_address_compare_func
);
463 static int socket_load(Unit
*u
) {
464 Socket
*s
= SOCKET(u
);
468 assert(u
->load_state
== UNIT_STUB
);
470 r
= unit_load_fragment_and_dropin(u
, true);
474 if (u
->load_state
!= UNIT_LOADED
)
477 /* This is a new unit? Then let's add in some extras */
478 r
= socket_add_extras(s
);
482 return socket_verify(s
);
485 static SocketPeer
*socket_peer_new(void) {
488 p
= new(SocketPeer
, 1);
498 static SocketPeer
*socket_peer_free(SocketPeer
*p
) {
502 set_remove(p
->socket
->peers_by_address
, p
);
507 DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer
, socket_peer
, socket_peer_free
);
509 int socket_acquire_peer(Socket
*s
, int fd
, SocketPeer
**p
) {
510 _cleanup_(socket_peer_unrefp
) SocketPeer
*remote
= NULL
;
512 .peer_salen
= sizeof(union sockaddr_union
),
519 if (getpeername(fd
, &sa
.peer
.sa
, &sa
.peer_salen
) < 0)
520 return log_unit_error_errno(UNIT(s
), errno
, "getpeername failed: %m");
522 if (!IN_SET(sa
.peer
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
527 r
= set_ensure_allocated(&s
->peers_by_address
, &peer_address_hash_ops
);
531 i
= set_get(s
->peers_by_address
, &sa
);
533 *p
= socket_peer_ref(i
);
537 remote
= socket_peer_new();
541 remote
->peer
= sa
.peer
;
542 remote
->peer_salen
= sa
.peer_salen
;
544 r
= set_put(s
->peers_by_address
, remote
);
550 *p
= TAKE_PTR(remote
);
554 static const char* listen_lookup(int family
, int type
) {
556 if (family
== AF_NETLINK
)
557 return "ListenNetlink";
559 if (type
== SOCK_STREAM
)
560 return "ListenStream";
561 else if (type
== SOCK_DGRAM
)
562 return "ListenDatagram";
563 else if (type
== SOCK_SEQPACKET
)
564 return "ListenSequentialPacket";
566 assert_not_reached();
570 static void socket_dump(Unit
*u
, FILE *f
, const char *prefix
) {
571 Socket
*s
= SOCKET(u
);
572 const char *prefix2
, *str
;
577 prefix
= strempty(prefix
);
578 prefix2
= strjoina(prefix
, "\t");
581 "%sSocket State: %s\n"
583 "%sClean Result: %s\n"
584 "%sBindIPv6Only: %s\n"
586 "%sSocketMode: %04o\n"
587 "%sDirectoryMode: %04o\n"
591 "%sTransparent: %s\n"
593 "%sPassCredentials: %s\n"
594 "%sPassSecurity: %s\n"
595 "%sPassPacketInfo: %s\n"
596 "%sTCPCongestion: %s\n"
597 "%sRemoveOnStop: %s\n"
599 "%sFileDescriptorName: %s\n"
600 "%sSELinuxContextFromNet: %s\n",
601 prefix
, socket_state_to_string(s
->state
),
602 prefix
, socket_result_to_string(s
->result
),
603 prefix
, socket_result_to_string(s
->clean_result
),
604 prefix
, socket_address_bind_ipv6_only_to_string(s
->bind_ipv6_only
),
606 prefix
, s
->socket_mode
,
607 prefix
, s
->directory_mode
,
608 prefix
, yes_no(s
->keep_alive
),
609 prefix
, yes_no(s
->no_delay
),
610 prefix
, yes_no(s
->free_bind
),
611 prefix
, yes_no(s
->transparent
),
612 prefix
, yes_no(s
->broadcast
),
613 prefix
, yes_no(s
->pass_cred
),
614 prefix
, yes_no(s
->pass_sec
),
615 prefix
, yes_no(s
->pass_pktinfo
),
616 prefix
, strna(s
->tcp_congestion
),
617 prefix
, yes_no(s
->remove_on_stop
),
618 prefix
, yes_no(s
->writable
),
619 prefix
, socket_fdname(s
),
620 prefix
, yes_no(s
->selinux_context_from_net
));
622 if (s
->timestamping
!= SOCKET_TIMESTAMPING_OFF
)
624 "%sTimestamping: %s\n",
625 prefix
, socket_timestamping_to_string(s
->timestamping
));
627 if (pidref_is_set(&s
->control_pid
))
629 "%sControl PID: "PID_FMT
"\n",
630 prefix
, s
->control_pid
.pid
);
632 if (s
->bind_to_device
)
634 "%sBindToDevice: %s\n",
635 prefix
, s
->bind_to_device
);
640 "%sNConnections: %u\n"
641 "%sMaxConnections: %u\n"
642 "%sMaxConnectionsPerSource: %u\n",
643 prefix
, s
->n_accepted
,
644 prefix
, s
->n_connections
,
645 prefix
, s
->max_connections
,
646 prefix
, s
->max_connections_per_source
);
649 "%sFlushPending: %s\n",
650 prefix
, yes_no(s
->flush_pending
));
653 if (s
->priority
>= 0)
656 prefix
, s
->priority
);
658 if (s
->receive_buffer
> 0)
660 "%sReceiveBuffer: %zu\n",
661 prefix
, s
->receive_buffer
);
663 if (s
->send_buffer
> 0)
665 "%sSendBuffer: %zu\n",
666 prefix
, s
->send_buffer
);
678 if (s
->pipe_size
> 0)
681 prefix
, s
->pipe_size
);
688 if (s
->mq_maxmsg
> 0)
690 "%sMessageQueueMaxMessages: %li\n",
691 prefix
, s
->mq_maxmsg
);
693 if (s
->mq_msgsize
> 0)
695 "%sMessageQueueMessageSize: %li\n",
696 prefix
, s
->mq_msgsize
);
701 prefix
, yes_no(s
->reuse_port
));
705 "%sSmackLabel: %s\n",
710 "%sSmackLabelIPIn: %s\n",
711 prefix
, s
->smack_ip_in
);
715 "%sSmackLabelIPOut: %s\n",
716 prefix
, s
->smack_ip_out
);
718 if (!isempty(s
->user
) || !isempty(s
->group
))
721 "%sSocketGroup: %s\n",
722 prefix
, strna(s
->user
),
723 prefix
, strna(s
->group
));
725 if (timestamp_is_set(s
->keep_alive_time
))
727 "%sKeepAliveTimeSec: %s\n",
728 prefix
, FORMAT_TIMESPAN(s
->keep_alive_time
, USEC_PER_SEC
));
730 if (s
->keep_alive_interval
> 0)
732 "%sKeepAliveIntervalSec: %s\n",
733 prefix
, FORMAT_TIMESPAN(s
->keep_alive_interval
, USEC_PER_SEC
));
735 if (s
->keep_alive_cnt
> 0)
737 "%sKeepAliveProbes: %u\n",
738 prefix
, s
->keep_alive_cnt
);
740 if (s
->defer_accept
> 0)
742 "%sDeferAcceptSec: %s\n",
743 prefix
, FORMAT_TIMESPAN(s
->defer_accept
, USEC_PER_SEC
));
745 LIST_FOREACH(port
, p
, s
->ports
) {
748 case SOCKET_SOCKET
: {
749 _cleanup_free_
char *k
= NULL
;
752 r
= socket_address_print(&p
->address
, &k
);
755 fprintf(f
, "%s%s: %m\n", prefix
, listen_lookup(socket_address_family(&p
->address
), p
->address
.type
));
757 fprintf(f
, "%s%s: %s\n", prefix
, listen_lookup(socket_address_family(&p
->address
), p
->address
.type
), k
);
761 fprintf(f
, "%sListenSpecial: %s\n", prefix
, p
->path
);
763 case SOCKET_USB_FUNCTION
:
764 fprintf(f
, "%sListenUSBFunction: %s\n", prefix
, p
->path
);
767 fprintf(f
, "%sListenMessageQueue: %s\n", prefix
, p
->path
);
770 fprintf(f
, "%sListenFIFO: %s\n", prefix
, p
->path
);
775 "%sTriggerLimitIntervalSec: %s\n"
776 "%sTriggerLimitBurst: %u\n"
777 "%sPollLimitIntervalSec: %s\n"
778 "%sPollLimitBurst: %u\n",
779 prefix
, FORMAT_TIMESPAN(s
->trigger_limit
.interval
, USEC_PER_SEC
),
780 prefix
, s
->trigger_limit
.burst
,
781 prefix
, FORMAT_TIMESPAN(s
->poll_limit_interval
, USEC_PER_SEC
),
782 prefix
, s
->poll_limit_burst
);
784 str
= ip_protocol_to_name(s
->socket_protocol
);
786 fprintf(f
, "%sSocketProtocol: %s\n", prefix
, str
);
788 if (!strv_isempty(s
->symlinks
)) {
789 fprintf(f
, "%sSymlinks:", prefix
);
790 STRV_FOREACH(q
, s
->symlinks
)
791 fprintf(f
, " %s", *q
);
797 "%sTimeoutSec: %s\n",
798 prefix
, FORMAT_TIMESPAN(s
->timeout_usec
, USEC_PER_SEC
));
800 exec_context_dump(&s
->exec_context
, f
, prefix
);
801 kill_context_dump(&s
->kill_context
, f
, prefix
);
803 for (SocketExecCommand c
= 0; c
< _SOCKET_EXEC_COMMAND_MAX
; c
++) {
804 if (!s
->exec_command
[c
])
807 fprintf(f
, "%s-> %s:\n",
808 prefix
, socket_exec_command_to_string(c
));
810 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
813 cgroup_context_dump(UNIT(s
), f
, prefix
);
816 static int instance_from_socket(int fd
, unsigned nr
, char **instance
) {
819 union sockaddr_union local
, remote
;
825 if (getsockname(fd
, &local
.sa
, &l
) < 0)
829 if (getpeername(fd
, &remote
.sa
, &l
) < 0)
832 switch (local
.sa
.sa_family
) {
836 a
= be32toh(local
.in
.sin_addr
.s_addr
),
837 b
= be32toh(remote
.in
.sin_addr
.s_addr
);
840 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
842 a
>> 24, (a
>> 16) & 0xFF, (a
>> 8) & 0xFF, a
& 0xFF,
843 be16toh(local
.in
.sin_port
),
844 b
>> 24, (b
>> 16) & 0xFF, (b
>> 8) & 0xFF, b
& 0xFF,
845 be16toh(remote
.in
.sin_port
)) < 0)
852 static const unsigned char ipv4_prefix
[] = {
853 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
856 if (memcmp(&local
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0 &&
857 memcmp(&remote
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0) {
859 *a
= local
.in6
.sin6_addr
.s6_addr
+12,
860 *b
= remote
.in6
.sin6_addr
.s6_addr
+12;
863 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
865 a
[0], a
[1], a
[2], a
[3],
866 be16toh(local
.in6
.sin6_port
),
867 b
[0], b
[1], b
[2], b
[3],
868 be16toh(remote
.in6
.sin6_port
)) < 0)
874 IN6_ADDR_TO_STRING(&local
.in6
.sin6_addr
),
875 be16toh(local
.in6
.sin6_port
),
876 IN6_ADDR_TO_STRING(&remote
.in6
.sin6_addr
),
877 be16toh(remote
.in6
.sin6_port
)) < 0)
888 k
= getpeercred(fd
, &ucred
);
891 "%u-"PID_FMT
"-"UID_FMT
,
892 nr
, ucred
.pid
, ucred
.uid
) < 0)
894 } else if (k
== -ENODATA
) {
895 /* This handles the case where somebody is
896 * connecting from another pid/uid namespace
897 * (e.g. from outside of our container). */
912 local
.vm
.svm_cid
, local
.vm
.svm_port
,
913 remote
.vm
.svm_cid
, remote
.vm
.svm_port
) < 0)
919 assert_not_reached();
926 static void socket_close_fds(Socket
*s
) {
929 LIST_FOREACH(port
, p
, s
->ports
) {
932 was_open
= p
->fd
>= 0;
934 p
->event_source
= sd_event_source_disable_unref(p
->event_source
);
935 p
->fd
= safe_close(p
->fd
);
936 socket_cleanup_fd_list(p
);
938 /* One little note: we should normally not delete any sockets in the file system here! After all some
939 * other process we spawned might still have a reference of this fd and wants to continue to use
940 * it. Therefore we normally delete sockets in the file system before we create a new one, not after we
941 * stopped using one! That all said, if the user explicitly requested this, we'll delete them here
942 * anyway, but only then. */
944 if (!was_open
|| !s
->remove_on_stop
)
950 (void) unlink(p
->path
);
954 (void) mq_unlink(p
->path
);
958 (void) socket_address_unlink(&p
->address
);
966 if (s
->remove_on_stop
)
967 STRV_FOREACH(i
, s
->symlinks
)
970 /* Note that we don't return NULL here, since s has not been freed. */
973 static void socket_apply_socket_options(Socket
*s
, SocketPort
*p
, int fd
) {
981 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_KEEPALIVE
, true);
983 log_unit_warning_errno(UNIT(s
), r
, "SO_KEEPALIVE failed: %m");
986 if (timestamp_is_set(s
->keep_alive_time
)) {
987 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPIDLE
, s
->keep_alive_time
/ USEC_PER_SEC
);
989 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPIDLE failed: %m");
992 if (s
->keep_alive_interval
> 0) {
993 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPINTVL
, s
->keep_alive_interval
/ USEC_PER_SEC
);
995 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPINTVL failed: %m");
998 if (s
->keep_alive_cnt
> 0) {
999 r
= setsockopt_int(fd
, SOL_TCP
, TCP_KEEPCNT
, s
->keep_alive_cnt
);
1001 log_unit_warning_errno(UNIT(s
), r
, "TCP_KEEPCNT failed: %m");
1004 if (s
->defer_accept
> 0) {
1005 r
= setsockopt_int(fd
, SOL_TCP
, TCP_DEFER_ACCEPT
, s
->defer_accept
/ USEC_PER_SEC
);
1007 log_unit_warning_errno(UNIT(s
), r
, "TCP_DEFER_ACCEPT failed: %m");
1011 if (s
->socket_protocol
== IPPROTO_SCTP
) {
1012 r
= setsockopt_int(fd
, SOL_SCTP
, SCTP_NODELAY
, true);
1014 log_unit_warning_errno(UNIT(s
), r
, "SCTP_NODELAY failed: %m");
1016 r
= setsockopt_int(fd
, SOL_TCP
, TCP_NODELAY
, true);
1018 log_unit_warning_errno(UNIT(s
), r
, "TCP_NODELAY failed: %m");
1023 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_BROADCAST
, true);
1025 log_unit_warning_errno(UNIT(s
), r
, "SO_BROADCAST failed: %m");
1029 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PASSCRED
, true);
1031 log_unit_warning_errno(UNIT(s
), r
, "SO_PASSCRED failed: %m");
1035 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PASSSEC
, true);
1037 log_unit_warning_errno(UNIT(s
), r
, "SO_PASSSEC failed: %m");
1040 if (s
->pass_pktinfo
) {
1041 r
= socket_set_recvpktinfo(fd
, socket_address_family(&p
->address
), true);
1043 log_unit_warning_errno(UNIT(s
), r
, "Failed to enable packet info socket option: %m");
1046 if (s
->timestamping
!= SOCKET_TIMESTAMPING_OFF
) {
1047 r
= setsockopt_int(fd
, SOL_SOCKET
,
1048 s
->timestamping
== SOCKET_TIMESTAMPING_NS
? SO_TIMESTAMPNS
: SO_TIMESTAMP
,
1051 log_unit_warning_errno(UNIT(s
), r
, "Failed to enable timestamping socket option, ignoring: %m");
1054 if (s
->priority
>= 0) {
1055 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PRIORITY
, s
->priority
);
1057 log_unit_warning_errno(UNIT(s
), r
, "SO_PRIORITY failed: %m");
1060 if (s
->receive_buffer
> 0) {
1061 r
= fd_set_rcvbuf(fd
, s
->receive_buffer
, false);
1063 log_unit_full_errno(UNIT(s
), ERRNO_IS_PRIVILEGE(r
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1064 "SO_RCVBUF/SO_RCVBUFFORCE failed: %m");
1067 if (s
->send_buffer
> 0) {
1068 r
= fd_set_sndbuf(fd
, s
->send_buffer
, false);
1070 log_unit_full_errno(UNIT(s
), ERRNO_IS_PRIVILEGE(r
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1071 "SO_SNDBUF/SO_SNDBUFFORCE failed: %m");
1075 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_MARK
, s
->mark
);
1077 log_unit_warning_errno(UNIT(s
), r
, "SO_MARK failed: %m");
1080 if (s
->ip_tos
>= 0) {
1081 r
= setsockopt_int(fd
, IPPROTO_IP
, IP_TOS
, s
->ip_tos
);
1083 log_unit_warning_errno(UNIT(s
), r
, "IP_TOS failed: %m");
1086 if (s
->ip_ttl
>= 0) {
1087 r
= socket_set_ttl(fd
, socket_address_family(&p
->address
), s
->ip_ttl
);
1089 log_unit_warning_errno(UNIT(s
), r
, "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
1092 if (s
->tcp_congestion
)
1093 if (setsockopt(fd
, SOL_TCP
, TCP_CONGESTION
, s
->tcp_congestion
, strlen(s
->tcp_congestion
)+1) < 0)
1094 log_unit_warning_errno(UNIT(s
), errno
, "TCP_CONGESTION failed: %m");
1096 if (s
->smack_ip_in
) {
1097 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_IPIN
, s
->smack_ip_in
);
1099 log_unit_error_errno(UNIT(s
), r
, "mac_smack_apply_ip_in_fd: %m");
1102 if (s
->smack_ip_out
) {
1103 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_IPOUT
, s
->smack_ip_out
);
1105 log_unit_error_errno(UNIT(s
), r
, "mac_smack_apply_ip_out_fd: %m");
1109 static void socket_apply_fifo_options(Socket
*s
, int fd
) {
1115 if (s
->pipe_size
> 0)
1116 if (fcntl(fd
, F_SETPIPE_SZ
, s
->pipe_size
) < 0)
1117 log_unit_warning_errno(UNIT(s
), errno
, "Setting pipe size failed, ignoring: %m");
1120 r
= mac_smack_apply_fd(fd
, SMACK_ATTR_ACCESS
, s
->smack
);
1122 log_unit_error_errno(UNIT(s
), r
, "SMACK relabelling failed, ignoring: %m");
1126 static int fifo_address_create(
1128 mode_t directory_mode
,
1129 mode_t socket_mode
) {
1131 _cleanup_close_
int fd
= -EBADF
;
1138 (void) mkdir_parents_label(path
, directory_mode
);
1140 r
= mac_selinux_create_file_prepare(path
, S_IFIFO
);
1144 /* Enforce the right access mode for the fifo */
1145 old_mask
= umask(~socket_mode
);
1147 /* Include the original umask in our mask */
1148 (void) umask(~socket_mode
| old_mask
);
1150 r
= mkfifo(path
, socket_mode
);
1151 (void) umask(old_mask
);
1153 if (r
< 0 && errno
!= EEXIST
) {
1158 fd
= open(path
, O_RDWR
| O_CLOEXEC
| O_NOCTTY
| O_NONBLOCK
| O_NOFOLLOW
);
1164 mac_selinux_create_file_clear();
1166 if (fstat(fd
, &st
) < 0) {
1171 if (!S_ISFIFO(st
.st_mode
) ||
1172 (st
.st_mode
& 0777) != (socket_mode
& ~old_mask
) ||
1173 st
.st_uid
!= getuid() ||
1174 st
.st_gid
!= getgid()) {
1182 mac_selinux_create_file_clear();
1186 static int special_address_create(const char *path
, bool writable
) {
1187 _cleanup_close_
int fd
= -EBADF
;
1192 fd
= open(path
, (writable
? O_RDWR
: O_RDONLY
)|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
);
1196 if (fstat(fd
, &st
) < 0)
1199 /* Check whether this is a /proc, /sys or /dev file or char device */
1200 if (!S_ISREG(st
.st_mode
) && !S_ISCHR(st
.st_mode
))
1206 static int usbffs_address_create(const char *path
) {
1207 _cleanup_close_
int fd
= -EBADF
;
1212 fd
= open(path
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
);
1216 if (fstat(fd
, &st
) < 0)
1219 /* Check whether this is a regular file (ffs endpoint) */
1220 if (!S_ISREG(st
.st_mode
))
1226 static int mq_address_create(
1232 _cleanup_close_
int fd
= -EBADF
;
1235 struct mq_attr _attr
, *attr
= NULL
;
1239 if (maxmsg
> 0 && msgsize
> 0) {
1240 _attr
= (struct mq_attr
) {
1241 .mq_flags
= O_NONBLOCK
,
1242 .mq_maxmsg
= maxmsg
,
1243 .mq_msgsize
= msgsize
,
1248 /* Enforce the right access mode for the mq */
1249 old_mask
= umask(~mq_mode
);
1251 /* Include the original umask in our mask */
1252 (void) umask(~mq_mode
| old_mask
);
1253 fd
= mq_open(path
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
|O_CREAT
, mq_mode
, attr
);
1254 (void) umask(old_mask
);
1259 if (fstat(fd
, &st
) < 0)
1262 if ((st
.st_mode
& 0777) != (mq_mode
& ~old_mask
) ||
1263 st
.st_uid
!= getuid() ||
1264 st
.st_gid
!= getgid())
1270 static int socket_symlink(Socket
*s
) {
1276 p
= socket_find_symlink_target(s
);
1280 STRV_FOREACH(i
, s
->symlinks
) {
1281 (void) mkdir_parents_label(*i
, s
->directory_mode
);
1283 r
= symlink_idempotent(p
, *i
, false);
1285 if (r
== -EEXIST
&& s
->remove_on_stop
) {
1286 /* If there's already something where we want to create the symlink, and the destructive
1287 * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try
1290 if (unlink(*i
) >= 0)
1291 r
= symlink_idempotent(p
, *i
, false);
1295 log_unit_warning_errno(UNIT(s
), r
, "Failed to create symlink %s %s %s, ignoring: %m",
1296 p
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), *i
);
1302 static int usbffs_write_descs(int fd
, Service
*s
) {
1305 if (!s
->usb_function_descriptors
|| !s
->usb_function_strings
)
1308 r
= copy_file_fd(s
->usb_function_descriptors
, fd
, 0);
1312 return copy_file_fd(s
->usb_function_strings
, fd
, 0);
1315 static int usbffs_select_ep(const struct dirent
*d
) {
1316 return d
->d_name
[0] != '.' && !streq(d
->d_name
, "ep0");
1319 static int usbffs_dispatch_eps(SocketPort
*p
) {
1320 _cleanup_free_
struct dirent
**ent
= NULL
;
1324 r
= scandir(p
->path
, &ent
, usbffs_select_ep
, alphasort
);
1329 p
->auxiliary_fds
= new(int, n
);
1330 if (!p
->auxiliary_fds
) {
1335 p
->n_auxiliary_fds
= n
;
1338 for (size_t i
= 0; i
< n
; ++i
) {
1339 _cleanup_free_
char *ep
= NULL
;
1341 ep
= path_make_absolute(ent
[i
]->d_name
, p
->path
);
1349 r
= usbffs_address_create(ep
);
1353 p
->auxiliary_fds
[k
++] = r
;
1360 close_many(p
->auxiliary_fds
, k
);
1361 p
->auxiliary_fds
= mfree(p
->auxiliary_fds
);
1362 p
->n_auxiliary_fds
= 0;
1365 free_many((void**) ent
, n
);
1369 int socket_load_service_unit(Socket
*s
, int cfd
, Unit
**ret
) {
1370 /* Figure out what the unit that will be used to handle the connections on the socket looks like.
1372 * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake
1376 if (UNIT_ISSET(s
->service
)) {
1377 *ret
= UNIT_DEREF(s
->service
);
1384 /* Build the instance name and load the unit */
1385 _cleanup_free_
char *prefix
= NULL
, *instance
= NULL
, *name
= NULL
;
1388 r
= unit_name_to_prefix(UNIT(s
)->id
, &prefix
);
1393 r
= instance_from_socket(cfd
, s
->n_accepted
, &instance
);
1395 if (ERRNO_IS_DISCONNECT(r
))
1396 /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return
1397 * different errors. This connection is over, but the socket unit lives on. */
1398 return log_unit_debug_errno(UNIT(s
), r
,
1399 "Got %s on incoming socket, assuming aborted connection attempt, ignoring.",
1405 /* For accepting sockets, we don't know how the instance will be called until we get a connection and
1406 * can figure out what the peer name is. So let's use "internal" as the instance to make it clear
1407 * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */
1408 r
= unit_name_build(prefix
, instance
?: "internal", ".service", &name
);
1412 return manager_load_unit(UNIT(s
)->manager
, name
, NULL
, NULL
, ret
);
1415 static int socket_determine_selinux_label(Socket
*s
, char **ret
) {
1423 const char *exec_context
;
1424 _cleanup_free_
char *path
= NULL
;
1426 r
= socket_load_service_unit(s
, -1, &service
);
1432 exec_context
= SERVICE(service
)->exec_context
.selinux_context
;
1436 con
= strdup(exec_context
);
1440 *ret
= TAKE_PTR(con
);
1444 c
= SERVICE(service
)->exec_command
[SERVICE_EXEC_START
];
1448 r
= chase(c
->path
, SERVICE(service
)->exec_context
.root_directory
, CHASE_PREFIX_ROOT
, &path
, NULL
);
1452 r
= mac_selinux_get_create_label_from_exe(path
, ret
);
1453 if (IN_SET(r
, -EPERM
, -EOPNOTSUPP
))
1462 static int socket_address_listen_do(
1464 const SocketAddress
*address
,
1465 const char *label
) {
1470 return socket_address_listen(
1472 SOCK_CLOEXEC
|SOCK_NONBLOCK
,
1484 #define log_address_error_errno(u, address, error, fmt) \
1486 _cleanup_free_ char *_t = NULL; \
1488 (void) socket_address_print(address, &_t); \
1489 log_unit_error_errno(u, error, fmt, strna(_t)); \
1492 static int fork_needed(const SocketAddress
*address
, const ExecContext
*context
) {
1498 /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */
1500 if (IN_SET(address
->sockaddr
.sa
.sa_family
, AF_INET
, AF_INET6
)) {
1501 r
= bpf_firewall_supported();
1504 if (r
!= BPF_FIREWALL_UNSUPPORTED
) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */
1508 return exec_needs_network_namespace(context
);
1511 static int socket_address_listen_in_cgroup(
1513 const SocketAddress
*address
,
1514 const char *label
) {
1516 _cleanup_(pidref_done
) PidRef pid
= PIDREF_NULL
;
1517 _cleanup_close_pair_
int pair
[2] = PIPE_EBADF
;
1523 /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the
1524 * socket's cgroup and network namespace in which the socket is actually created. This way we ensure
1525 * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and
1528 r
= fork_needed(address
, &s
->exec_context
);
1532 /* Shortcut things... */
1533 fd
= socket_address_listen_do(s
, address
, label
);
1535 return log_address_error_errno(UNIT(s
), address
, fd
, "Failed to create listening socket (%s): %m");
1540 r
= unit_setup_exec_runtime(UNIT(s
));
1542 return log_unit_error_errno(UNIT(s
), r
, "Failed acquire runtime: %m");
1544 if (s
->exec_context
.network_namespace_path
&&
1546 s
->exec_runtime
->shared
&&
1547 s
->exec_runtime
->shared
->netns_storage_socket
[0] >= 0) {
1548 r
= open_shareable_ns_path(s
->exec_runtime
->shared
->netns_storage_socket
, s
->exec_context
.network_namespace_path
, CLONE_NEWNET
);
1550 return log_unit_error_errno(UNIT(s
), r
, "Failed to open network namespace path %s: %m", s
->exec_context
.network_namespace_path
);
1553 if (s
->exec_context
.ipc_namespace_path
&&
1555 s
->exec_runtime
->shared
&&
1556 s
->exec_runtime
->shared
->ipcns_storage_socket
[0] >= 0) {
1557 r
= open_shareable_ns_path(s
->exec_runtime
->shared
->ipcns_storage_socket
, s
->exec_context
.ipc_namespace_path
, CLONE_NEWIPC
);
1559 return log_unit_error_errno(UNIT(s
), r
, "Failed to open IPC namespace path %s: %m", s
->exec_context
.ipc_namespace_path
);
1562 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
|SOCK_CLOEXEC
, 0, pair
) < 0)
1563 return log_unit_error_errno(UNIT(s
), errno
, "Failed to create communication channel: %m");
1565 r
= unit_fork_helper_process(UNIT(s
), "(sd-listen)", &pid
);
1567 return log_unit_error_errno(UNIT(s
), r
, "Failed to fork off listener stub process: %m");
1571 pair
[0] = safe_close(pair
[0]);
1573 if (exec_needs_network_namespace(&s
->exec_context
) &&
1575 s
->exec_runtime
->shared
&&
1576 s
->exec_runtime
->shared
->netns_storage_socket
[0] >= 0) {
1578 if (ns_type_supported(NAMESPACE_NET
)) {
1579 r
= setup_shareable_ns(s
->exec_runtime
->shared
->netns_storage_socket
, CLONE_NEWNET
);
1581 log_unit_error_errno(UNIT(s
), r
, "Failed to join network namespace: %m");
1582 _exit(EXIT_NETWORK
);
1584 } else if (s
->exec_context
.network_namespace_path
) {
1585 log_unit_error(UNIT(s
), "Network namespace path configured but network namespaces not supported.");
1586 _exit(EXIT_NETWORK
);
1588 log_unit_warning(UNIT(s
), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring.");
1591 fd
= socket_address_listen_do(s
, address
, label
);
1593 log_address_error_errno(UNIT(s
), address
, fd
, "Failed to create listening socket (%s): %m");
1594 _exit(EXIT_FAILURE
);
1597 r
= send_one_fd(pair
[1], fd
, 0);
1599 log_address_error_errno(UNIT(s
), address
, r
, "Failed to send listening socket (%s) to parent: %m");
1600 _exit(EXIT_FAILURE
);
1603 _exit(EXIT_SUCCESS
);
1606 pair
[1] = safe_close(pair
[1]);
1607 fd
= receive_one_fd(pair
[0], 0);
1609 /* We synchronously wait for the helper, as it shouldn't be slow */
1610 r
= wait_for_terminate_and_check("(sd-listen)", pid
.pid
, WAIT_LOG_ABNORMAL
);
1617 return log_address_error_errno(UNIT(s
), address
, fd
, "Failed to receive listening socket (%s): %m");
1622 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket
*, socket_close_fds
, NULL
);
1624 static int socket_open_fds(Socket
*orig_s
) {
1625 _cleanup_(socket_close_fdsp
) Socket
*s
= orig_s
;
1626 _cleanup_(mac_selinux_freep
) char *label
= NULL
;
1627 bool know_label
= false;
1632 LIST_FOREACH(port
, p
, s
->ports
) {
1642 /* Figure out the label, if we don't it know yet. We do it once for the first
1643 * socket where we need this and remember it for the rest. */
1645 r
= socket_determine_selinux_label(s
, &label
);
1647 return log_unit_error_errno(UNIT(s
), r
, "Failed to determine SELinux label: %m");
1652 /* Apply the socket protocol */
1653 switch (p
->address
.type
) {
1656 case SOCK_SEQPACKET
:
1657 if (s
->socket_protocol
== IPPROTO_SCTP
)
1658 p
->address
.protocol
= s
->socket_protocol
;
1662 if (s
->socket_protocol
== IPPROTO_UDPLITE
)
1663 p
->address
.protocol
= s
->socket_protocol
;
1667 p
->fd
= socket_address_listen_in_cgroup(s
, &p
->address
, label
);
1671 socket_apply_socket_options(s
, p
, p
->fd
);
1675 case SOCKET_SPECIAL
:
1677 p
->fd
= special_address_create(p
->path
, s
->writable
);
1679 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open special file %s: %m", p
->path
);
1684 p
->fd
= fifo_address_create(
1689 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open FIFO %s: %m", p
->path
);
1691 socket_apply_fifo_options(s
, p
->fd
);
1697 p
->fd
= mq_address_create(
1703 return log_unit_error_errno(UNIT(s
), p
->fd
, "Failed to open message queue %s: %m", p
->path
);
1706 case SOCKET_USB_FUNCTION
: {
1707 _cleanup_free_
char *ep
= NULL
;
1709 ep
= path_make_absolute("ep0", p
->path
);
1713 p
->fd
= usbffs_address_create(ep
);
1717 r
= usbffs_write_descs(p
->fd
, SERVICE(UNIT_DEREF(s
->service
)));
1721 r
= usbffs_dispatch_eps(p
);
1728 assert_not_reached();
1736 static void socket_unwatch_fds(Socket
*s
) {
1741 LIST_FOREACH(port
, p
, s
->ports
) {
1745 if (!p
->event_source
)
1748 r
= sd_event_source_set_enabled(p
->event_source
, SD_EVENT_OFF
);
1750 log_unit_debug_errno(UNIT(s
), r
, "Failed to disable event source: %m");
1754 static int socket_watch_fds(Socket
*s
) {
1759 LIST_FOREACH(port
, p
, s
->ports
) {
1763 if (p
->event_source
) {
1764 r
= sd_event_source_set_enabled(p
->event_source
, SD_EVENT_ON
);
1768 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &p
->event_source
, p
->fd
, EPOLLIN
, socket_dispatch_io
, p
);
1772 (void) sd_event_source_set_description(p
->event_source
, "socket-port-io");
1775 r
= sd_event_source_set_ratelimit(p
->event_source
, s
->poll_limit_interval
, s
->poll_limit_burst
);
1777 log_unit_debug_errno(UNIT(s
), r
, "Failed to set poll limit on I/O event source, ignoring: %m");
1783 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch listening fds: %m");
1784 socket_unwatch_fds(s
);
1794 static int socket_check_open(Socket
*s
) {
1795 bool have_open
= false, have_closed
= false;
1799 LIST_FOREACH(port
, p
, s
->ports
) {
1805 if (have_open
&& have_closed
)
1806 return SOCKET_OPEN_SOME
;
1810 return SOCKET_OPEN_ALL
;
1812 return SOCKET_OPEN_NONE
;
1815 static void socket_set_state(Socket
*s
, SocketState state
) {
1816 SocketState old_state
;
1819 if (s
->state
!= state
)
1820 bus_unit_send_pending_change_signal(UNIT(s
), false);
1822 old_state
= s
->state
;
1830 SOCKET_STOP_PRE_SIGTERM
,
1831 SOCKET_STOP_PRE_SIGKILL
,
1833 SOCKET_FINAL_SIGTERM
,
1834 SOCKET_FINAL_SIGKILL
,
1837 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1838 socket_unwatch_control_pid(s
);
1839 s
->control_command
= NULL
;
1840 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
1843 if (state
!= SOCKET_LISTENING
)
1844 socket_unwatch_fds(s
);
1852 SOCKET_STOP_PRE_SIGTERM
,
1853 SOCKET_STOP_PRE_SIGKILL
,
1855 socket_close_fds(s
);
1857 if (state
!= old_state
)
1858 log_unit_debug(UNIT(s
), "Changed %s -> %s", socket_state_to_string(old_state
), socket_state_to_string(state
));
1860 unit_notify(UNIT(s
), state_translation_table
[old_state
], state_translation_table
[state
], /* reload_success = */ true);
1863 static int socket_coldplug(Unit
*u
) {
1864 Socket
*s
= SOCKET(u
);
1868 assert(s
->state
== SOCKET_DEAD
);
1870 if (s
->deserialized_state
== s
->state
)
1873 if (pidref_is_set(&s
->control_pid
) &&
1874 pid_is_unwaited(s
->control_pid
.pid
) &&
1875 IN_SET(s
->deserialized_state
,
1880 SOCKET_STOP_PRE_SIGTERM
,
1881 SOCKET_STOP_PRE_SIGKILL
,
1883 SOCKET_FINAL_SIGTERM
,
1884 SOCKET_FINAL_SIGKILL
,
1887 r
= unit_watch_pid(UNIT(s
), s
->control_pid
.pid
, /* exclusive= */ false);
1891 r
= socket_arm_timer(s
, usec_add(u
->state_change_timestamp
.monotonic
, s
->timeout_usec
));
1896 if (IN_SET(s
->deserialized_state
,
1902 /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors
1903 * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for
1904 * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open,
1905 * and if there's a mismatch, warn loudly. */
1907 r
= socket_check_open(s
);
1908 if (r
== SOCKET_OPEN_NONE
)
1909 log_unit_warning(UNIT(s
),
1910 "Socket unit configuration has changed while unit has been running, "
1911 "no open socket file descriptor left. "
1912 "The socket unit is not functional until restarted.");
1913 else if (r
== SOCKET_OPEN_SOME
)
1914 log_unit_warning(UNIT(s
),
1915 "Socket unit configuration has changed while unit has been running, "
1916 "and some socket file descriptors have not been opened yet. "
1917 "The socket unit is not fully functional until restarted.");
1920 if (s
->deserialized_state
== SOCKET_LISTENING
) {
1921 r
= socket_watch_fds(s
);
1926 if (!IN_SET(s
->deserialized_state
, SOCKET_DEAD
, SOCKET_FAILED
, SOCKET_CLEANING
))
1927 (void) unit_setup_exec_runtime(u
);
1929 socket_set_state(s
, s
->deserialized_state
);
1933 static int socket_spawn(Socket
*s
, ExecCommand
*c
, PidRef
*ret_pid
) {
1935 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1936 .flags
= EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
,
1938 .stdout_fd
= -EBADF
,
1939 .stderr_fd
= -EBADF
,
1942 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
1950 r
= unit_prepare_exec(UNIT(s
));
1954 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
1958 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1962 r
= exec_spawn(UNIT(s
),
1972 r
= pidref_set_pid(&pidref
, pid
);
1976 r
= unit_watch_pid(UNIT(s
), pidref
.pid
, /* exclusive= */ true);
1980 *ret_pid
= TAKE_PIDREF(pidref
);
1984 static int socket_chown(Socket
*s
, PidRef
*ret_pid
) {
1985 _cleanup_(pidref_done
) PidRef pid
= PIDREF_NULL
;
1990 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
1994 /* We have to resolve the user names out-of-process, hence
1995 * let's fork here. It's messy, but well, what can we do? */
1997 r
= unit_fork_helper_process(UNIT(s
), "(sd-chown)", &pid
);
2001 uid_t uid
= UID_INVALID
;
2002 gid_t gid
= GID_INVALID
;
2006 if (!isempty(s
->user
)) {
2007 const char *user
= s
->user
;
2009 r
= get_user_creds(&user
, &uid
, &gid
, NULL
, NULL
, 0);
2011 log_unit_error_errno(UNIT(s
), r
, "Failed to resolve user %s: %m", user
);
2016 if (!isempty(s
->group
)) {
2017 const char *group
= s
->group
;
2019 r
= get_group_creds(&group
, &gid
, 0);
2021 log_unit_error_errno(UNIT(s
), r
, "Failed to resolve group %s: %m", group
);
2026 LIST_FOREACH(port
, p
, s
->ports
) {
2027 const char *path
= NULL
;
2029 if (p
->type
== SOCKET_SOCKET
)
2030 path
= socket_address_get_path(&p
->address
);
2031 else if (p
->type
== SOCKET_FIFO
)
2037 if (chown(path
, uid
, gid
) < 0) {
2038 log_unit_error_errno(UNIT(s
), errno
, "Failed to chown(): %m");
2043 _exit(EXIT_SUCCESS
);
2046 r
= unit_watch_pid(UNIT(s
), pid
.pid
, /* exclusive= */ true);
2050 *ret_pid
= TAKE_PIDREF(pid
);
2054 static void socket_enter_dead(Socket
*s
, SocketResult f
) {
2057 if (s
->result
== SOCKET_SUCCESS
)
2060 if (s
->result
== SOCKET_SUCCESS
)
2061 unit_log_success(UNIT(s
));
2063 unit_log_failure(UNIT(s
), socket_result_to_string(s
->result
));
2065 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
2067 socket_set_state(s
, s
->result
!= SOCKET_SUCCESS
? SOCKET_FAILED
: SOCKET_DEAD
);
2069 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2071 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2073 unit_unref_uid_gid(UNIT(s
), true);
2076 static void socket_enter_signal(Socket
*s
, SocketState state
, SocketResult f
);
2078 static void socket_enter_stop_post(Socket
*s
, SocketResult f
) {
2082 if (s
->result
== SOCKET_SUCCESS
)
2085 socket_unwatch_control_pid(s
);
2086 s
->control_command_id
= SOCKET_EXEC_STOP_POST
;
2087 s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_POST
];
2089 if (s
->control_command
) {
2090 pidref_done(&s
->control_pid
);
2092 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2096 socket_set_state(s
, SOCKET_STOP_POST
);
2098 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_SUCCESS
);
2103 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2104 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_RESOURCES
);
2107 static int state_to_kill_operation(Socket
*s
, SocketState state
) {
2108 if (state
== SOCKET_STOP_PRE_SIGTERM
&& unit_has_job_type(UNIT(s
), JOB_RESTART
))
2109 return KILL_RESTART
;
2111 if (state
== SOCKET_FINAL_SIGTERM
)
2112 return KILL_TERMINATE
;
2117 static void socket_enter_signal(Socket
*s
, SocketState state
, SocketResult f
) {
2122 if (s
->result
== SOCKET_SUCCESS
)
2125 r
= unit_kill_context(
2128 state_to_kill_operation(s
, state
),
2129 /* main_pid= */ NULL
,
2131 /* main_pid_alien= */ false);
2136 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_usec
));
2140 socket_set_state(s
, state
);
2141 } else if (state
== SOCKET_STOP_PRE_SIGTERM
)
2142 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, SOCKET_SUCCESS
);
2143 else if (state
== SOCKET_STOP_PRE_SIGKILL
)
2144 socket_enter_stop_post(s
, SOCKET_SUCCESS
);
2145 else if (state
== SOCKET_FINAL_SIGTERM
)
2146 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_SUCCESS
);
2148 socket_enter_dead(s
, SOCKET_SUCCESS
);
2153 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2155 if (IN_SET(state
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_STOP_PRE_SIGKILL
))
2156 socket_enter_stop_post(s
, SOCKET_FAILURE_RESOURCES
);
2158 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2161 static void socket_enter_stop_pre(Socket
*s
, SocketResult f
) {
2165 if (s
->result
== SOCKET_SUCCESS
)
2168 socket_unwatch_control_pid(s
);
2169 s
->control_command_id
= SOCKET_EXEC_STOP_PRE
;
2170 s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_PRE
];
2172 if (s
->control_command
) {
2173 pidref_done(&s
->control_pid
);
2175 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2179 socket_set_state(s
, SOCKET_STOP_PRE
);
2181 socket_enter_stop_post(s
, SOCKET_SUCCESS
);
2186 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-pre' task: %m");
2187 socket_enter_stop_post(s
, SOCKET_FAILURE_RESOURCES
);
2190 static void socket_enter_listening(Socket
*s
) {
2194 if (!s
->accept
&& s
->flush_pending
) {
2195 log_unit_debug(UNIT(s
), "Flushing socket before listening.");
2199 r
= socket_watch_fds(s
);
2201 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch sockets: %m");
2205 socket_set_state(s
, SOCKET_LISTENING
);
2209 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2212 static void socket_enter_start_post(Socket
*s
) {
2216 socket_unwatch_control_pid(s
);
2217 s
->control_command_id
= SOCKET_EXEC_START_POST
;
2218 s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_POST
];
2220 if (s
->control_command
) {
2221 pidref_done(&s
->control_pid
);
2223 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2225 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2229 socket_set_state(s
, SOCKET_START_POST
);
2231 socket_enter_listening(s
);
2236 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2239 static void socket_enter_start_chown(Socket
*s
) {
2244 r
= socket_open_fds(s
);
2246 log_unit_warning_errno(UNIT(s
), r
, "Failed to listen on sockets: %m");
2250 if (!isempty(s
->user
) || !isempty(s
->group
)) {
2252 socket_unwatch_control_pid(s
);
2253 s
->control_command_id
= SOCKET_EXEC_START_CHOWN
;
2254 s
->control_command
= NULL
;
2256 r
= socket_chown(s
, &s
->control_pid
);
2258 log_unit_warning_errno(UNIT(s
), r
, "Failed to fork 'start-chown' task: %m");
2262 socket_set_state(s
, SOCKET_START_CHOWN
);
2264 socket_enter_start_post(s
);
2269 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2272 static void socket_enter_start_pre(Socket
*s
) {
2276 socket_unwatch_control_pid(s
);
2278 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
);
2280 s
->control_command_id
= SOCKET_EXEC_START_PRE
;
2281 s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_PRE
];
2283 if (s
->control_command
) {
2284 pidref_done(&s
->control_pid
);
2286 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2288 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2292 socket_set_state(s
, SOCKET_START_PRE
);
2294 socket_enter_start_chown(s
);
2299 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2302 static void flush_ports(Socket
*s
) {
2305 /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy
2308 LIST_FOREACH(port
, p
, s
->ports
) {
2312 (void) flush_accept(p
->fd
);
2313 (void) flush_fd(p
->fd
);
2317 static void socket_enter_running(Socket
*s
, int cfd_in
) {
2318 /* Note that this call takes possession of the connection fd passed. It either has to assign it
2319 * somewhere or close it. */
2320 _cleanup_close_
int cfd
= cfd_in
;
2322 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2327 /* We don't take connections anymore if we are supposed to shut down anyway */
2328 if (unit_stop_pending(UNIT(s
))) {
2330 log_unit_debug(UNIT(s
), "Suppressing connection request since unit stop is scheduled.");
2339 if (!ratelimit_below(&s
->trigger_limit
)) {
2340 log_unit_warning(UNIT(s
), "Trigger limit hit, refusing further activation.");
2341 socket_enter_stop_pre(s
, SOCKET_FAILURE_TRIGGER_LIMIT_HIT
);
2346 bool pending
= false;
2349 /* If there's already a start pending don't bother to do anything */
2350 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_TRIGGERS
)
2351 if (unit_active_or_pending(other
)) {
2357 if (!UNIT_ISSET(s
->service
)) {
2358 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOENT
),
2359 "Service to activate vanished, refusing activation.");
2363 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, UNIT_DEREF(s
->service
), JOB_REPLACE
, NULL
, &error
, NULL
);
2368 socket_set_state(s
, SOCKET_RUNNING
);
2370 _cleanup_(socket_peer_unrefp
) SocketPeer
*p
= NULL
;
2373 if (s
->n_connections
>= s
->max_connections
) {
2374 log_unit_warning(UNIT(s
), "Too many incoming connections (%u), dropping connection.",
2379 if (s
->max_connections_per_source
> 0) {
2380 r
= socket_acquire_peer(s
, cfd
, &p
);
2382 if (ERRNO_IS_DISCONNECT(r
))
2384 /* We didn't have enough resources to acquire peer information, let's fail. */
2387 if (r
> 0 && p
->n_ref
> s
->max_connections_per_source
) {
2388 _cleanup_free_
char *t
= NULL
;
2390 (void) sockaddr_pretty(&p
->peer
.sa
, p
->peer_salen
, true, false, &t
);
2392 log_unit_warning(UNIT(s
),
2393 "Too many incoming connections (%u) from source %s, dropping connection.",
2394 p
->n_ref
, strnull(t
));
2399 r
= socket_load_service_unit(s
, cfd
, &service
);
2401 if (ERRNO_IS_DISCONNECT(r
))
2406 r
= unit_add_two_dependencies(UNIT(s
), UNIT_BEFORE
, UNIT_TRIGGERS
, service
,
2407 false, UNIT_DEPENDENCY_IMPLICIT
);
2413 r
= service_set_socket_fd(SERVICE(service
), cfd
, s
, p
, s
->selinux_context_from_net
);
2415 if (ERRNO_IS_DISCONNECT(r
))
2420 TAKE_FD(cfd
); /* We passed ownership of the fd to the service now. Forget it here. */
2423 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, service
, JOB_REPLACE
, NULL
, &error
, NULL
);
2425 /* We failed to activate the new service, but it still exists. Let's make sure the
2426 * service closes and forgets the connection fd again, immediately. */
2427 service_release_socket_fd(SERVICE(service
));
2431 /* Notify clients about changed counters */
2432 unit_add_to_dbus_queue(UNIT(s
));
2442 if (ERRNO_IS_RESOURCE(r
))
2443 log_unit_warning(UNIT(s
), "Failed to queue service startup job: %s",
2444 bus_error_message(&error
, r
));
2446 log_unit_warning(UNIT(s
), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s",
2447 cfd
>= 0 ? "template" : "non-template",
2448 bus_error_message(&error
, r
));
2450 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2453 static void socket_run_next(Socket
*s
) {
2457 assert(s
->control_command
);
2458 assert(s
->control_command
->command_next
);
2460 socket_unwatch_control_pid(s
);
2462 s
->control_command
= s
->control_command
->command_next
;
2464 pidref_done(&s
->control_pid
);
2466 r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
);
2473 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next task: %m");
2475 if (s
->state
== SOCKET_START_POST
)
2476 socket_enter_stop_pre(s
, SOCKET_FAILURE_RESOURCES
);
2477 else if (s
->state
== SOCKET_STOP_POST
)
2478 socket_enter_dead(s
, SOCKET_FAILURE_RESOURCES
);
2480 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_RESOURCES
);
2483 static int socket_start(Unit
*u
) {
2484 Socket
*s
= SOCKET(u
);
2489 /* We cannot fulfill this request right now, try again later
2491 if (IN_SET(s
->state
,
2493 SOCKET_STOP_PRE_SIGKILL
,
2494 SOCKET_STOP_PRE_SIGTERM
,
2496 SOCKET_FINAL_SIGTERM
,
2497 SOCKET_FINAL_SIGKILL
,
2501 /* Already on it! */
2502 if (IN_SET(s
->state
,
2508 /* Cannot run this without the service being around */
2509 if (UNIT_ISSET(s
->service
)) {
2512 service
= SERVICE(UNIT_DEREF(s
->service
));
2514 if (UNIT(service
)->load_state
!= UNIT_LOADED
)
2515 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
2516 "Socket service %s not loaded, refusing.", UNIT(service
)->id
);
2518 /* If the service is already active we cannot start the
2520 if (!IN_SET(service
->state
,
2521 SERVICE_DEAD
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED
, SERVICE_FAILED_BEFORE_AUTO_RESTART
,
2522 SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
))
2523 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EBUSY
),
2524 "Socket service %s already active, refusing.", UNIT(service
)->id
);
2527 assert(IN_SET(s
->state
, SOCKET_DEAD
, SOCKET_FAILED
));
2529 r
= unit_acquire_invocation_id(u
);
2533 s
->result
= SOCKET_SUCCESS
;
2534 exec_command_reset_status_list_array(s
->exec_command
, _SOCKET_EXEC_COMMAND_MAX
);
2536 u
->reset_accounting
= true;
2538 socket_enter_start_pre(s
);
2542 static int socket_stop(Unit
*u
) {
2543 Socket
*s
= SOCKET(u
);
2548 if (IN_SET(s
->state
,
2550 SOCKET_STOP_PRE_SIGTERM
,
2551 SOCKET_STOP_PRE_SIGKILL
,
2553 SOCKET_FINAL_SIGTERM
,
2554 SOCKET_FINAL_SIGKILL
))
2557 /* If there's already something running we go directly into
2559 if (IN_SET(s
->state
,
2562 SOCKET_START_POST
)) {
2563 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_SUCCESS
);
2567 /* If we are currently cleaning, then abort it, brutally. */
2568 if (s
->state
== SOCKET_CLEANING
) {
2569 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_SUCCESS
);
2573 assert(IN_SET(s
->state
, SOCKET_LISTENING
, SOCKET_RUNNING
));
2575 socket_enter_stop_pre(s
, SOCKET_SUCCESS
);
2579 static int socket_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2580 Socket
*s
= SOCKET(u
);
2587 (void) serialize_item(f
, "state", socket_state_to_string(s
->state
));
2588 (void) serialize_item(f
, "result", socket_result_to_string(s
->result
));
2589 (void) serialize_item_format(f
, "n-accepted", "%u", s
->n_accepted
);
2590 (void) serialize_item_format(f
, "n-refused", "%u", s
->n_refused
);
2592 if (pidref_is_set(&s
->control_pid
))
2593 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
.pid
);
2595 if (s
->control_command_id
>= 0)
2596 (void) serialize_item(f
, "control-command", socket_exec_command_to_string(s
->control_command_id
));
2598 LIST_FOREACH(port
, p
, s
->ports
) {
2604 copy
= fdset_put_dup(fds
, p
->fd
);
2606 return log_unit_warning_errno(u
, copy
, "Failed to serialize socket fd: %m");
2608 if (p
->type
== SOCKET_SOCKET
) {
2609 _cleanup_free_
char *t
= NULL
;
2611 r
= socket_address_print(&p
->address
, &t
);
2613 return log_unit_error_errno(u
, r
, "Failed to format socket address: %m");
2615 if (socket_address_family(&p
->address
) == AF_NETLINK
)
2616 (void) serialize_item_format(f
, "netlink", "%i %s", copy
, t
);
2618 (void) serialize_item_format(f
, "socket", "%i %i %s", copy
, p
->address
.type
, t
);
2619 } else if (p
->type
== SOCKET_SPECIAL
)
2620 (void) serialize_item_format(f
, "special", "%i %s", copy
, p
->path
);
2621 else if (p
->type
== SOCKET_MQUEUE
)
2622 (void) serialize_item_format(f
, "mqueue", "%i %s", copy
, p
->path
);
2623 else if (p
->type
== SOCKET_USB_FUNCTION
)
2624 (void) serialize_item_format(f
, "ffs", "%i %s", copy
, p
->path
);
2626 assert(p
->type
== SOCKET_FIFO
);
2627 (void) serialize_item_format(f
, "fifo", "%i %s", copy
, p
->path
);
2634 static int socket_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2635 Socket
*s
= SOCKET(u
);
2642 if (streq(key
, "state")) {
2645 state
= socket_state_from_string(value
);
2647 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2649 s
->deserialized_state
= state
;
2650 } else if (streq(key
, "result")) {
2653 f
= socket_result_from_string(value
);
2655 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2656 else if (f
!= SOCKET_SUCCESS
)
2659 } else if (streq(key
, "n-accepted")) {
2662 if (safe_atou(value
, &k
) < 0)
2663 log_unit_debug(u
, "Failed to parse n-accepted value: %s", value
);
2666 } else if (streq(key
, "n-refused")) {
2669 if (safe_atou(value
, &k
) < 0)
2670 log_unit_debug(u
, "Failed to parse n-refused value: %s", value
);
2673 } else if (streq(key
, "control-pid")) {
2674 pidref_done(&s
->control_pid
);
2675 r
= pidref_set_pidstr(&s
->control_pid
, value
);
2677 log_debug_errno(r
, "Failed to pin control PID '%s', ignoring: %m", value
);
2678 } else if (streq(key
, "control-command")) {
2679 SocketExecCommand id
;
2681 id
= socket_exec_command_from_string(value
);
2683 log_unit_debug(u
, "Failed to parse exec-command value: %s", value
);
2685 s
->control_command_id
= id
;
2686 s
->control_command
= s
->exec_command
[id
];
2688 } else if (streq(key
, "fifo")) {
2689 _cleanup_free_
char *fdv
= NULL
;
2693 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2695 log_unit_debug(u
, "Failed to parse fifo value: %s", value
);
2700 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2701 log_unit_debug(u
, "Invalid fifo value: %s", fdv
);
2705 LIST_FOREACH(port
, p
, s
->ports
)
2707 p
->type
== SOCKET_FIFO
&&
2708 path_equal_or_inode_same(p
->path
, value
, 0)) {
2709 p
->fd
= fdset_remove(fds
, fd
);
2714 log_unit_debug(u
, "No matching fifo socket found: %s", value
);
2716 } else if (streq(key
, "special")) {
2717 _cleanup_free_
char *fdv
= NULL
;
2721 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2723 log_unit_debug(u
, "Failed to parse special value: %s", value
);
2728 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2729 log_unit_debug(u
, "Invalid special value: %s", fdv
);
2733 LIST_FOREACH(port
, p
, s
->ports
)
2735 p
->type
== SOCKET_SPECIAL
&&
2736 path_equal_or_inode_same(p
->path
, value
, 0)) {
2737 p
->fd
= fdset_remove(fds
, fd
);
2742 log_unit_debug(u
, "No matching special socket found: %s", value
);
2744 } else if (streq(key
, "mqueue")) {
2745 _cleanup_free_
char *fdv
= NULL
;
2749 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2751 log_unit_debug(u
, "Failed to parse mqueue value: %s", value
);
2756 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2757 log_unit_debug(u
, "Invalid mqueue value: %s", fdv
);
2761 LIST_FOREACH(port
, p
, s
->ports
)
2763 p
->type
== SOCKET_MQUEUE
&&
2764 streq(p
->path
, value
)) {
2765 p
->fd
= fdset_remove(fds
, fd
);
2770 log_unit_debug(u
, "No matching mqueue socket found: %s", value
);
2772 } else if (streq(key
, "socket")) {
2773 _cleanup_free_
char *fdv
= NULL
, *typev
= NULL
;
2777 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2779 log_unit_debug(u
, "Failed to parse socket fd from value: %s", value
);
2784 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2785 log_unit_debug(u
, "Invalid socket fd: %s", fdv
);
2789 r
= extract_first_word(&value
, &typev
, NULL
, 0);
2791 log_unit_debug(u
, "Failed to parse socket type from value: %s", value
);
2795 if (safe_atoi(typev
, &type
) < 0 || type
< 0) {
2796 log_unit_debug(u
, "Invalid socket type: %s", typev
);
2800 LIST_FOREACH(port
, p
, s
->ports
)
2802 socket_address_is(&p
->address
, value
, type
)) {
2803 p
->fd
= fdset_remove(fds
, fd
);
2808 log_unit_debug(u
, "No matching %s socket found: %s",
2809 socket_address_type_to_string(type
), value
);
2811 } else if (streq(key
, "netlink")) {
2812 _cleanup_free_
char *fdv
= NULL
;
2816 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2818 log_unit_debug(u
, "Failed to parse socket value: %s", value
);
2823 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2824 log_unit_debug(u
, "Invalid socket value: %s", fdv
);
2828 LIST_FOREACH(port
, p
, s
->ports
)
2830 socket_address_is_netlink(&p
->address
, value
)) {
2831 p
->fd
= fdset_remove(fds
, fd
);
2836 log_unit_debug(u
, "No matching netlink socket found: %s", value
);
2838 } else if (streq(key
, "ffs")) {
2839 _cleanup_free_
char *fdv
= NULL
;
2843 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2845 log_unit_debug(u
, "Failed to parse ffs value: %s", value
);
2850 if (fd
< 0 || !fdset_contains(fds
, fd
)) {
2851 log_unit_debug(u
, "Invalid ffs value: %s", fdv
);
2855 LIST_FOREACH(port
, p
, s
->ports
)
2857 p
->type
== SOCKET_USB_FUNCTION
&&
2858 path_equal_or_inode_same(p
->path
, value
, 0)) {
2859 p
->fd
= fdset_remove(fds
, fd
);
2864 log_unit_debug(u
, "No matching ffs socket found: %s", value
);
2867 log_unit_debug(UNIT(s
), "Unknown serialization key: %s", key
);
2872 static void socket_distribute_fds(Unit
*u
, FDSet
*fds
) {
2873 Socket
*s
= SOCKET(u
);
2877 LIST_FOREACH(port
, p
, s
->ports
) {
2880 if (p
->type
!= SOCKET_SOCKET
)
2886 FDSET_FOREACH(fd
, fds
) {
2887 if (socket_address_matches_fd(&p
->address
, fd
)) {
2888 p
->fd
= fdset_remove(fds
, fd
);
2889 s
->deserialized_state
= SOCKET_LISTENING
;
2896 static UnitActiveState
socket_active_state(Unit
*u
) {
2899 return state_translation_table
[SOCKET(u
)->state
];
2902 static const char *socket_sub_state_to_string(Unit
*u
) {
2905 return socket_state_to_string(SOCKET(u
)->state
);
2908 const char* socket_port_type_to_string(SocketPort
*p
) {
2916 switch (p
->address
.type
) {
2924 case SOCK_SEQPACKET
:
2925 return "SequentialPacket";
2928 if (socket_address_family(&p
->address
) == AF_NETLINK
)
2936 case SOCKET_SPECIAL
:
2940 return "MessageQueue";
2945 case SOCKET_USB_FUNCTION
:
2946 return "USBFunction";
2953 SocketType
socket_port_type_from_string(const char *s
) {
2956 if (STR_IN_SET(s
, "Stream", "Datagram", "SequentialPacket", "Netlink"))
2957 return SOCKET_SOCKET
;
2958 else if (streq(s
, "Special"))
2959 return SOCKET_SPECIAL
;
2960 else if (streq(s
, "MessageQueue"))
2961 return SOCKET_MQUEUE
;
2962 else if (streq(s
, "FIFO"))
2964 else if (streq(s
, "USBFunction"))
2965 return SOCKET_USB_FUNCTION
;
2967 return _SOCKET_TYPE_INVALID
;
2970 static bool socket_may_gc(Unit
*u
) {
2971 Socket
*s
= SOCKET(u
);
2975 return s
->n_connections
== 0;
2978 static int socket_accept_do(Socket
*s
, int fd
) {
2984 cfd
= accept4(fd
, NULL
, NULL
, SOCK_NONBLOCK
|SOCK_CLOEXEC
);
2986 /* Convert transient network errors into clean and well-defined EAGAIN */
2987 return ERRNO_IS_ACCEPT_AGAIN(errno
) ? -EAGAIN
: -errno
;
2992 static int socket_accept_in_cgroup(Socket
*s
, SocketPort
*p
, int fd
) {
2993 _cleanup_(pidref_done
) PidRef pid
= PIDREF_NULL
;
2994 _cleanup_close_pair_
int pair
[2] = PIPE_EBADF
;
3001 /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any
3002 * connection socket is also properly associated with the cgroup. */
3004 if (!IN_SET(p
->address
.sockaddr
.sa
.sa_family
, AF_INET
, AF_INET6
))
3007 r
= bpf_firewall_supported();
3010 if (r
== BPF_FIREWALL_UNSUPPORTED
)
3013 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
|SOCK_CLOEXEC
, 0, pair
) < 0)
3014 return log_unit_error_errno(UNIT(s
), errno
, "Failed to create communication channel: %m");
3016 r
= unit_fork_helper_process(UNIT(s
), "(sd-accept)", &pid
);
3018 return log_unit_error_errno(UNIT(s
), r
, "Failed to fork off accept stub process: %m");
3022 pair
[0] = safe_close(pair
[0]);
3024 cfd
= socket_accept_do(s
, fd
);
3025 if (cfd
== -EAGAIN
) /* spurious accept() */
3026 _exit(EXIT_SUCCESS
);
3028 log_unit_error_errno(UNIT(s
), cfd
, "Failed to accept connection socket: %m");
3029 _exit(EXIT_FAILURE
);
3032 r
= send_one_fd(pair
[1], cfd
, 0);
3034 log_unit_error_errno(UNIT(s
), r
, "Failed to send connection socket to parent: %m");
3035 _exit(EXIT_FAILURE
);
3038 _exit(EXIT_SUCCESS
);
3041 pair
[1] = safe_close(pair
[1]);
3042 cfd
= receive_one_fd(pair
[0], 0);
3044 /* We synchronously wait for the helper, as it shouldn't be slow */
3045 r
= wait_for_terminate_and_check("(sd-accept)", pid
.pid
, WAIT_LOG_ABNORMAL
);
3051 /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS
3052 * this is a spurious accept(), let's convert that back to EAGAIN here. */
3056 return log_unit_error_errno(UNIT(s
), cfd
, "Failed to receive connection socket: %m");
3061 cfd
= socket_accept_do(s
, fd
);
3062 if (cfd
== -EAGAIN
) /* spurious accept(), skip it silently */
3065 return log_unit_error_errno(UNIT(s
), cfd
, "Failed to accept connection socket: %m");
3070 static int socket_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
3071 SocketPort
*p
= ASSERT_PTR(userdata
);
3076 if (p
->socket
->state
!= SOCKET_LISTENING
)
3079 log_unit_debug(UNIT(p
->socket
), "Incoming traffic");
3081 if (revents
!= EPOLLIN
) {
3082 if (revents
& EPOLLHUP
)
3083 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.");
3085 log_unit_error(UNIT(p
->socket
), "Got unexpected poll event (0x%x) on socket.", revents
);
3089 if (p
->socket
->accept
&&
3090 p
->type
== SOCKET_SOCKET
&&
3091 socket_address_can_accept(&p
->address
)) {
3093 cfd
= socket_accept_in_cgroup(p
->socket
, p
, fd
);
3094 if (cfd
== -EAGAIN
) /* Spurious accept() */
3099 socket_apply_socket_options(p
->socket
, p
, cfd
);
3102 socket_enter_running(p
->socket
, cfd
);
3106 socket_enter_stop_pre(p
->socket
, SOCKET_FAILURE_RESOURCES
);
3110 static void socket_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3111 Socket
*s
= SOCKET(u
);
3117 if (pid
!= s
->control_pid
.pid
)
3120 pidref_done(&s
->control_pid
);
3122 if (is_clean_exit(code
, status
, EXIT_CLEAN_COMMAND
, NULL
))
3124 else if (code
== CLD_EXITED
)
3125 f
= SOCKET_FAILURE_EXIT_CODE
;
3126 else if (code
== CLD_KILLED
)
3127 f
= SOCKET_FAILURE_SIGNAL
;
3128 else if (code
== CLD_DUMPED
)
3129 f
= SOCKET_FAILURE_CORE_DUMP
;
3131 assert_not_reached();
3133 if (s
->control_command
) {
3134 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3136 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3140 unit_log_process_exit(
3143 socket_exec_command_to_string(s
->control_command_id
),
3144 f
== SOCKET_SUCCESS
,
3147 if (s
->result
== SOCKET_SUCCESS
)
3150 if (s
->control_command
&&
3151 s
->control_command
->command_next
&&
3152 f
== SOCKET_SUCCESS
) {
3154 log_unit_debug(u
, "Running next command for state %s", socket_state_to_string(s
->state
));
3157 s
->control_command
= NULL
;
3158 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
3160 /* No further commands for this step, so let's figure
3161 * out what to do next */
3163 log_unit_debug(u
, "Got final SIGCHLD for state %s", socket_state_to_string(s
->state
));
3167 case SOCKET_START_PRE
:
3168 if (f
== SOCKET_SUCCESS
)
3169 socket_enter_start_chown(s
);
3171 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, f
);
3174 case SOCKET_START_CHOWN
:
3175 if (f
== SOCKET_SUCCESS
)
3176 socket_enter_start_post(s
);
3178 socket_enter_stop_pre(s
, f
);
3181 case SOCKET_START_POST
:
3182 if (f
== SOCKET_SUCCESS
)
3183 socket_enter_listening(s
);
3185 socket_enter_stop_pre(s
, f
);
3188 case SOCKET_STOP_PRE
:
3189 case SOCKET_STOP_PRE_SIGTERM
:
3190 case SOCKET_STOP_PRE_SIGKILL
:
3191 socket_enter_stop_post(s
, f
);
3194 case SOCKET_STOP_POST
:
3195 case SOCKET_FINAL_SIGTERM
:
3196 case SOCKET_FINAL_SIGKILL
:
3197 socket_enter_dead(s
, f
);
3200 case SOCKET_CLEANING
:
3202 if (s
->clean_result
== SOCKET_SUCCESS
)
3203 s
->clean_result
= f
;
3205 socket_enter_dead(s
, SOCKET_SUCCESS
);
3209 assert_not_reached();
3213 /* Notify clients about changed exit status */
3214 unit_add_to_dbus_queue(u
);
3217 static int socket_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3218 Socket
*s
= SOCKET(userdata
);
3221 assert(s
->timer_event_source
== source
);
3225 case SOCKET_START_PRE
:
3226 log_unit_warning(UNIT(s
), "Starting timed out. Terminating.");
3227 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3230 case SOCKET_START_CHOWN
:
3231 case SOCKET_START_POST
:
3232 log_unit_warning(UNIT(s
), "Starting timed out. Stopping.");
3233 socket_enter_stop_pre(s
, SOCKET_FAILURE_TIMEOUT
);
3236 case SOCKET_STOP_PRE
:
3237 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3238 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3241 case SOCKET_STOP_PRE_SIGTERM
:
3242 if (s
->kill_context
.send_sigkill
) {
3243 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3244 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, SOCKET_FAILURE_TIMEOUT
);
3246 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL. Ignoring.");
3247 socket_enter_stop_post(s
, SOCKET_FAILURE_TIMEOUT
);
3251 case SOCKET_STOP_PRE_SIGKILL
:
3252 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3253 socket_enter_stop_post(s
, SOCKET_FAILURE_TIMEOUT
);
3256 case SOCKET_STOP_POST
:
3257 log_unit_warning(UNIT(s
), "Stopping timed out (2). Terminating.");
3258 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, SOCKET_FAILURE_TIMEOUT
);
3261 case SOCKET_FINAL_SIGTERM
:
3262 if (s
->kill_context
.send_sigkill
) {
3263 log_unit_warning(UNIT(s
), "Stopping timed out (2). Killing.");
3264 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, SOCKET_FAILURE_TIMEOUT
);
3266 log_unit_warning(UNIT(s
), "Stopping timed out (2). Skipping SIGKILL. Ignoring.");
3267 socket_enter_dead(s
, SOCKET_FAILURE_TIMEOUT
);
3271 case SOCKET_FINAL_SIGKILL
:
3272 log_unit_warning(UNIT(s
), "Still around after SIGKILL (2). Entering failed mode.");
3273 socket_enter_dead(s
, SOCKET_FAILURE_TIMEOUT
);
3276 case SOCKET_CLEANING
:
3277 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3279 if (s
->clean_result
== SOCKET_SUCCESS
)
3280 s
->clean_result
= SOCKET_FAILURE_TIMEOUT
;
3282 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, 0);
3286 assert_not_reached();
3292 int socket_collect_fds(Socket
*s
, int **fds
) {
3293 size_t k
= 0, n
= 0;
3299 /* Called from the service code for requesting our fds */
3301 LIST_FOREACH(port
, p
, s
->ports
) {
3304 n
+= p
->n_auxiliary_fds
;
3316 LIST_FOREACH(port
, p
, s
->ports
) {
3319 for (size_t i
= 0; i
< p
->n_auxiliary_fds
; ++i
)
3320 rfds
[k
++] = p
->auxiliary_fds
[i
];
3329 static void socket_reset_failed(Unit
*u
) {
3330 Socket
*s
= SOCKET(u
);
3334 if (s
->state
== SOCKET_FAILED
)
3335 socket_set_state(s
, SOCKET_DEAD
);
3337 s
->result
= SOCKET_SUCCESS
;
3338 s
->clean_result
= SOCKET_SUCCESS
;
3341 void socket_connection_unref(Socket
*s
) {
3344 /* The service is dead. Yay!
3346 * This is strictly for one-instance-per-connection
3349 assert(s
->n_connections
> 0);
3352 log_unit_debug(UNIT(s
), "One connection closed, %u left.", s
->n_connections
);
3355 static void socket_trigger_notify(Unit
*u
, Unit
*other
) {
3356 Socket
*s
= SOCKET(u
);
3361 /* Filter out invocations with bogus state */
3362 assert(UNIT_IS_LOAD_COMPLETE(other
->load_state
));
3363 assert(other
->type
== UNIT_SERVICE
);
3365 /* Don't propagate state changes from the service if we are already down */
3366 if (!IN_SET(s
->state
, SOCKET_RUNNING
, SOCKET_LISTENING
))
3369 /* We don't care for the service state if we are in Accept=yes mode */
3373 /* Propagate start limit hit state */
3374 if (other
->start_limit_hit
) {
3375 socket_enter_stop_pre(s
, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT
);
3379 /* Don't propagate anything if there's still a job queued */
3383 if (IN_SET(SERVICE(other
)->state
,
3384 SERVICE_DEAD
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED
, SERVICE_FAILED_BEFORE_AUTO_RESTART
,
3385 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
3386 SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
))
3387 socket_enter_listening(s
);
3389 if (SERVICE(other
)->state
== SERVICE_RUNNING
)
3390 socket_set_state(s
, SOCKET_RUNNING
);
3393 static int socket_get_timeout(Unit
*u
, usec_t
*timeout
) {
3394 Socket
*s
= SOCKET(u
);
3398 if (!s
->timer_event_source
)
3401 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3404 if (t
== USEC_INFINITY
)
3411 char *socket_fdname(Socket
*s
) {
3414 /* Returns the name to use for $LISTEN_NAMES. If the user
3415 * didn't specify anything specifically, use the socket unit's
3416 * name as fallback. */
3418 return s
->fdname
?: UNIT(s
)->id
;
3421 static PidRef
*socket_control_pid(Unit
*u
) {
3422 return &ASSERT_PTR(SOCKET(u
))->control_pid
;
3425 static int socket_clean(Unit
*u
, ExecCleanMask mask
) {
3426 _cleanup_strv_free_
char **l
= NULL
;
3427 Socket
*s
= SOCKET(u
);
3433 if (s
->state
!= SOCKET_DEAD
)
3436 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
3440 if (strv_isempty(l
))
3443 socket_unwatch_control_pid(s
);
3444 s
->clean_result
= SOCKET_SUCCESS
;
3445 s
->control_command
= NULL
;
3446 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
3448 r
= socket_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
3452 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
3456 socket_set_state(s
, SOCKET_CLEANING
);
3460 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
3461 s
->clean_result
= SOCKET_FAILURE_RESOURCES
;
3462 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
3466 static int socket_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
3467 Socket
*s
= SOCKET(u
);
3471 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
3474 static int socket_can_start(Unit
*u
) {
3475 Socket
*s
= SOCKET(u
);
3480 r
= unit_test_start_limit(u
);
3482 socket_enter_dead(s
, SOCKET_FAILURE_START_LIMIT_HIT
);
3489 static const char* const socket_exec_command_table
[_SOCKET_EXEC_COMMAND_MAX
] = {
3490 [SOCKET_EXEC_START_PRE
] = "ExecStartPre",
3491 [SOCKET_EXEC_START_CHOWN
] = "ExecStartChown",
3492 [SOCKET_EXEC_START_POST
] = "ExecStartPost",
3493 [SOCKET_EXEC_STOP_PRE
] = "ExecStopPre",
3494 [SOCKET_EXEC_STOP_POST
] = "ExecStopPost"
3497 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command
, SocketExecCommand
);
3499 static const char* const socket_result_table
[_SOCKET_RESULT_MAX
] = {
3500 [SOCKET_SUCCESS
] = "success",
3501 [SOCKET_FAILURE_RESOURCES
] = "resources",
3502 [SOCKET_FAILURE_TIMEOUT
] = "timeout",
3503 [SOCKET_FAILURE_EXIT_CODE
] = "exit-code",
3504 [SOCKET_FAILURE_SIGNAL
] = "signal",
3505 [SOCKET_FAILURE_CORE_DUMP
] = "core-dump",
3506 [SOCKET_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
3507 [SOCKET_FAILURE_TRIGGER_LIMIT_HIT
] = "trigger-limit-hit",
3508 [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT
] = "service-start-limit-hit"
3511 DEFINE_STRING_TABLE_LOOKUP(socket_result
, SocketResult
);
3513 static const char* const socket_timestamping_table
[_SOCKET_TIMESTAMPING_MAX
] = {
3514 [SOCKET_TIMESTAMPING_OFF
] = "off",
3515 [SOCKET_TIMESTAMPING_US
] = "us",
3516 [SOCKET_TIMESTAMPING_NS
] = "ns",
3519 DEFINE_STRING_TABLE_LOOKUP(socket_timestamping
, SocketTimestamping
);
3521 SocketTimestamping
socket_timestamping_from_string_harder(const char *p
) {
3522 SocketTimestamping t
;
3526 return _SOCKET_TIMESTAMPING_INVALID
;
3528 t
= socket_timestamping_from_string(p
);
3532 /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here,
3534 if (streq(p
, "nsec"))
3535 return SOCKET_TIMESTAMPING_NS
;
3536 if (STR_IN_SET(p
, "usec", "µs", "μs")) /* Accept both small greek letter mu + micro sign unicode codepoints */
3537 return SOCKET_TIMESTAMPING_US
;
3539 r
= parse_boolean(p
);
3541 return _SOCKET_TIMESTAMPING_INVALID
;
3543 return r
? SOCKET_TIMESTAMPING_NS
: SOCKET_TIMESTAMPING_OFF
; /* If boolean yes, default to ns accuracy */
3546 const UnitVTable socket_vtable
= {
3547 .object_size
= sizeof(Socket
),
3548 .exec_context_offset
= offsetof(Socket
, exec_context
),
3549 .cgroup_context_offset
= offsetof(Socket
, cgroup_context
),
3550 .kill_context_offset
= offsetof(Socket
, kill_context
),
3551 .exec_runtime_offset
= offsetof(Socket
, exec_runtime
),
3557 .private_section
= "Socket",
3559 .can_transient
= true,
3560 .can_trigger
= true,
3563 .init
= socket_init
,
3564 .done
= socket_done
,
3565 .load
= socket_load
,
3567 .coldplug
= socket_coldplug
,
3569 .dump
= socket_dump
,
3571 .start
= socket_start
,
3572 .stop
= socket_stop
,
3574 .clean
= socket_clean
,
3575 .can_clean
= socket_can_clean
,
3577 .get_timeout
= socket_get_timeout
,
3579 .serialize
= socket_serialize
,
3580 .deserialize_item
= socket_deserialize_item
,
3581 .distribute_fds
= socket_distribute_fds
,
3583 .active_state
= socket_active_state
,
3584 .sub_state_to_string
= socket_sub_state_to_string
,
3586 .will_restart
= unit_will_restart_default
,
3588 .may_gc
= socket_may_gc
,
3590 .sigchld_event
= socket_sigchld_event
,
3592 .trigger_notify
= socket_trigger_notify
,
3594 .reset_failed
= socket_reset_failed
,
3596 .control_pid
= socket_control_pid
,
3598 .bus_set_property
= bus_socket_set_property
,
3599 .bus_commit_properties
= bus_socket_commit_properties
,
3601 .status_message_formats
= {
3602 .finished_start_job
= {
3603 [JOB_DONE
] = "Listening on %s.",
3604 [JOB_FAILED
] = "Failed to listen on %s.",
3605 [JOB_TIMEOUT
] = "Timed out starting %s.",
3607 .finished_stop_job
= {
3608 [JOB_DONE
] = "Closed %s.",
3609 [JOB_FAILED
] = "Failed stopping %s.",
3610 [JOB_TIMEOUT
] = "Timed out stopping %s.",
3614 .can_start
= socket_can_start
,