1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
27 #include <sys/epoll.h>
29 #include <arpa/inet.h>
30 #include <netinet/tcp.h>
32 #include <sys/xattr.h>
36 #include "load-dropin.h"
37 #include "load-fragment.h"
40 #include "path-util.h"
41 #include "unit-name.h"
42 #include "unit-printf.h"
46 #include "exit-status.h"
48 #include "smack-util.h"
50 #include "bus-error.h"
51 #include "dbus-socket.h"
55 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
56 [SOCKET_DEAD] = UNIT_INACTIVE,
57 [SOCKET_START_PRE] = UNIT_ACTIVATING,
58 [SOCKET_START_CHOWN] = UNIT_ACTIVATING,
59 [SOCKET_START_POST] = UNIT_ACTIVATING,
60 [SOCKET_LISTENING] = UNIT_ACTIVE,
61 [SOCKET_RUNNING] = UNIT_ACTIVE,
62 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
63 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
64 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
65 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
66 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
67 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
68 [SOCKET_FAILED] = UNIT_FAILED
71 static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
72 static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
74 static void socket_init(Unit *u) {
75 Socket *s = SOCKET(u);
78 assert(u->load_state == UNIT_STUB);
80 s->backlog = SOMAXCONN;
81 s->timeout_usec = u->manager->default_timeout_start_usec;
82 s->directory_mode = 0755;
83 s->socket_mode = 0666;
85 s->max_connections = 64;
92 s->exec_context.std_output = u->manager->default_std_output;
93 s->exec_context.std_error = u->manager->default_std_error;
95 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
98 static void socket_unwatch_control_pid(Socket *s) {
101 if (s->control_pid <= 0)
104 unit_unwatch_pid(UNIT(s), s->control_pid);
108 void socket_free_ports(Socket *s) {
113 while ((p = s->ports)) {
114 LIST_REMOVE(port, s->ports, p);
116 sd_event_source_unref(p->event_source);
124 static void socket_done(Unit *u) {
125 Socket *s = SOCKET(u);
129 socket_free_ports(s);
131 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
132 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
133 s->control_command = NULL;
135 socket_unwatch_control_pid(s);
137 unit_ref_unset(&s->service);
139 free(s->tcp_congestion);
140 s->tcp_congestion = NULL;
142 free(s->bind_to_device);
143 s->bind_to_device = NULL;
146 free(s->smack_ip_in);
147 free(s->smack_ip_out);
149 strv_free(s->symlinks);
154 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
157 static int socket_arm_timer(Socket *s) {
162 if (s->timeout_usec <= 0) {
163 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
167 if (s->timer_event_source) {
168 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec);
172 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
175 return sd_event_add_time(
176 UNIT(s)->manager->event,
177 &s->timer_event_source,
179 now(CLOCK_MONOTONIC) + s->timeout_usec, 0,
180 socket_dispatch_timer, s);
183 int socket_instantiate_service(Socket *s) {
184 _cleanup_free_ char *prefix = NULL, *name = NULL;
190 /* This fills in s->service if it isn't filled in yet. For
191 * Accept=yes sockets we create the next connection service
192 * here. For Accept=no this is mostly a NOP since the service
193 * is figured out at load time anyway. */
195 if (UNIT_DEREF(s->service) || !s->accept)
198 prefix = unit_name_to_prefix(UNIT(s)->id);
202 if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0)
205 r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
210 unit_ref_set(&s->service, u);
212 return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
215 static bool have_non_accept_socket(Socket *s) {
223 LIST_FOREACH(port, p, s->ports) {
225 if (p->type != SOCKET_SOCKET)
228 if (!socket_address_can_accept(&p->address))
235 static int socket_add_mount_links(Socket *s) {
241 LIST_FOREACH(port, p, s->ports) {
242 const char *path = NULL;
244 if (p->type == SOCKET_SOCKET)
245 path = socket_address_get_path(&p->address);
246 else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL)
252 r = unit_require_mounts_for(UNIT(s), path);
260 static int socket_add_device_link(Socket *s) {
265 if (!s->bind_to_device || streq(s->bind_to_device, "lo"))
268 t = strappenda("/sys/subsystem/net/devices/", s->bind_to_device);
269 return unit_add_node_link(UNIT(s), t, false);
272 static int socket_add_default_dependencies(Socket *s) {
276 r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true);
280 if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
281 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
286 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
289 _pure_ 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 if (have_non_accept_socket(s)) {
308 if (!UNIT_DEREF(s->service)) {
311 r = unit_load_related_unit(u, ".service", &x);
315 unit_ref_set(&s->service, x);
318 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
323 r = socket_add_mount_links(s);
327 r = socket_add_device_link(s);
331 r = unit_patch_contexts(u);
335 if (socket_has_exec(s)) {
336 r = unit_add_exec_dependencies(u, &s->exec_context);
340 r = unit_add_default_slice(u, &s->cgroup_context);
345 if (u->default_dependencies) {
346 r = socket_add_default_dependencies(s);
354 static const char *socket_find_symlink_target(Socket *s) {
355 const char *found = NULL;
358 LIST_FOREACH(port, p, s->ports) {
359 const char *f = NULL;
368 if (p->address.sockaddr.un.sun_path[0] != 0)
369 f = p->address.sockaddr.un.sun_path;
387 static int socket_verify(Socket *s) {
390 if (UNIT(s)->load_state != UNIT_LOADED)
394 log_error_unit(UNIT(s)->id, "%s lacks Listen setting. Refusing.", UNIT(s)->id);
398 if (s->accept && have_non_accept_socket(s)) {
399 log_error_unit(UNIT(s)->id, "%s configured for accepting sockets, but sockets are non-accepting. Refusing.",
404 if (s->accept && s->max_connections <= 0) {
405 log_error_unit(UNIT(s)->id, "%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
409 if (s->accept && UNIT_DEREF(s->service)) {
410 log_error_unit(UNIT(s)->id, "Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id);
414 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
415 log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
419 if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) {
420 log_error_unit(UNIT(s)->id, "%s has symlinks set but none or more than one node in the file system. Refusing.", UNIT(s)->id);
427 static int socket_load(Unit *u) {
428 Socket *s = SOCKET(u);
432 assert(u->load_state == UNIT_STUB);
434 r = unit_load_fragment_and_dropin(u);
438 if (u->load_state == UNIT_LOADED) {
439 /* This is a new unit? Then let's add in some extras */
440 r = socket_add_extras(s);
445 return socket_verify(s);
448 _const_ static const char* listen_lookup(int family, int type) {
450 if (family == AF_NETLINK)
451 return "ListenNetlink";
453 if (type == SOCK_STREAM)
454 return "ListenStream";
455 else if (type == SOCK_DGRAM)
456 return "ListenDatagram";
457 else if (type == SOCK_SEQPACKET)
458 return "ListenSequentialPacket";
460 assert_not_reached("Unknown socket type");
464 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
465 char time_string[FORMAT_TIMESPAN_MAX];
467 Socket *s = SOCKET(u);
474 prefix = strempty(prefix);
475 prefix2 = strappenda(prefix, "\t");
478 "%sSocket State: %s\n"
480 "%sBindIPv6Only: %s\n"
482 "%sSocketMode: %04o\n"
483 "%sDirectoryMode: %04o\n"
487 "%sTransparent: %s\n"
489 "%sPassCredentials: %s\n"
490 "%sPassSecurity: %s\n"
491 "%sTCPCongestion: %s\n"
492 "%sRemoveOnStop: %s\n",
493 prefix, socket_state_to_string(s->state),
494 prefix, socket_result_to_string(s->result),
495 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
497 prefix, s->socket_mode,
498 prefix, s->directory_mode,
499 prefix, yes_no(s->keep_alive),
500 prefix, yes_no(s->no_delay),
501 prefix, yes_no(s->free_bind),
502 prefix, yes_no(s->transparent),
503 prefix, yes_no(s->broadcast),
504 prefix, yes_no(s->pass_cred),
505 prefix, yes_no(s->pass_sec),
506 prefix, strna(s->tcp_congestion),
507 prefix, yes_no(s->remove_on_stop));
509 if (s->control_pid > 0)
511 "%sControl PID: "PID_FMT"\n",
512 prefix, s->control_pid);
514 if (s->bind_to_device)
516 "%sBindToDevice: %s\n",
517 prefix, s->bind_to_device);
522 "%sNConnections: %u\n"
523 "%sMaxConnections: %u\n",
524 prefix, s->n_accepted,
525 prefix, s->n_connections,
526 prefix, s->max_connections);
528 if (s->priority >= 0)
531 prefix, s->priority);
533 if (s->receive_buffer > 0)
535 "%sReceiveBuffer: %zu\n",
536 prefix, s->receive_buffer);
538 if (s->send_buffer > 0)
540 "%sSendBuffer: %zu\n",
541 prefix, s->send_buffer);
553 if (s->pipe_size > 0)
556 prefix, s->pipe_size);
563 if (s->mq_maxmsg > 0)
565 "%sMessageQueueMaxMessages: %li\n",
566 prefix, s->mq_maxmsg);
568 if (s->mq_msgsize > 0)
570 "%sMessageQueueMessageSize: %li\n",
571 prefix, s->mq_msgsize);
576 prefix, yes_no(s->reuse_port));
580 "%sSmackLabel: %s\n",
585 "%sSmackLabelIPIn: %s\n",
586 prefix, s->smack_ip_in);
590 "%sSmackLabelIPOut: %s\n",
591 prefix, s->smack_ip_out);
593 if (!isempty(s->user) || !isempty(s->group))
596 "%sOwnerGroup: %s\n",
597 prefix, strna(s->user),
598 prefix, strna(s->group));
600 if (s->keep_alive_time > 0)
602 "%sKeepAliveTimeSec: %s\n",
603 prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC));
605 if (s->keep_alive_interval)
607 "%sKeepAliveIntervalSec: %s\n",
608 prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC));
610 if (s->keep_alive_cnt)
612 "%sKeepAliveProbes: %u\n",
613 prefix, s->keep_alive_cnt);
617 "%sDeferAcceptSec: %s\n",
618 prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC));
620 LIST_FOREACH(port, p, s->ports) {
622 if (p->type == SOCKET_SOCKET) {
627 if ((r = socket_address_print(&p->address, &k)) < 0)
632 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
634 } else if (p->type == SOCKET_SPECIAL)
635 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
636 else if (p->type == SOCKET_MQUEUE)
637 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
639 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
642 exec_context_dump(&s->exec_context, f, prefix);
643 kill_context_dump(&s->kill_context, f, prefix);
645 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
646 if (!s->exec_command[c])
649 fprintf(f, "%s-> %s:\n",
650 prefix, socket_exec_command_to_string(c));
652 exec_command_dump_list(s->exec_command[c], f, prefix2);
656 static int instance_from_socket(int fd, unsigned nr, char **instance) {
659 union sockaddr_union local, remote;
665 if (getsockname(fd, &local.sa, &l) < 0)
669 if (getpeername(fd, &remote.sa, &l) < 0)
672 switch (local.sa.sa_family) {
676 a = ntohl(local.in.sin_addr.s_addr),
677 b = ntohl(remote.in.sin_addr.s_addr);
680 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
682 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
683 ntohs(local.in.sin_port),
684 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
685 ntohs(remote.in.sin_port)) < 0)
692 static const unsigned char ipv4_prefix[] = {
693 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
696 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
697 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
699 *a = local.in6.sin6_addr.s6_addr+12,
700 *b = remote.in6.sin6_addr.s6_addr+12;
703 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
705 a[0], a[1], a[2], a[3],
706 ntohs(local.in6.sin6_port),
707 b[0], b[1], b[2], b[3],
708 ntohs(remote.in6.sin6_port)) < 0)
711 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
716 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
717 ntohs(local.in6.sin6_port),
718 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
719 ntohs(remote.in6.sin6_port)) < 0)
730 k = getpeercred(fd, &ucred);
733 "%u-"PID_FMT"-"UID_FMT,
734 nr, ucred.pid, ucred.uid) < 0)
736 } else if (k == -ENODATA) {
737 /* This handles the case where somebody is
738 * connecting from another pid/uid namespace
739 * (e.g. from outside of our container). */
751 assert_not_reached("Unhandled socket type.");
758 static void socket_close_fds(Socket *s) {
764 LIST_FOREACH(port, p, s->ports) {
766 p->event_source = sd_event_source_unref(p->event_source);
771 p->fd = safe_close(p->fd);
773 /* One little note: we should normally not delete any
774 * sockets in the file system here! After all some
775 * other process we spawned might still have a
776 * reference of this fd and wants to continue to use
777 * it. Therefore we delete sockets in the file system
778 * before we create a new one, not after we stopped
781 if (s->remove_on_stop) {
793 socket_address_unlink(&p->address);
802 if (s->remove_on_stop)
803 STRV_FOREACH(i, s->symlinks)
807 static void socket_apply_socket_options(Socket *s, int fd) {
812 int b = s->keep_alive;
813 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
814 log_warning_unit(UNIT(s)->id, "SO_KEEPALIVE failed: %m");
817 if (s->keep_alive_time) {
818 int value = s->keep_alive_time / USEC_PER_SEC;
819 if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0)
820 log_warning_unit(UNIT(s)->id, "TCP_KEEPIDLE failed: %m");
823 if (s->keep_alive_interval) {
824 int value = s->keep_alive_interval / USEC_PER_SEC;
825 if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0)
826 log_warning_unit(UNIT(s)->id, "TCP_KEEPINTVL failed: %m");
829 if (s->keep_alive_cnt) {
830 int value = s->keep_alive_cnt;
831 if (setsockopt(fd, SOL_SOCKET, TCP_KEEPCNT, &value, sizeof(value)) < 0)
832 log_warning_unit(UNIT(s)->id, "TCP_KEEPCNT failed: %m");
835 if (s->defer_accept) {
836 int value = s->defer_accept / USEC_PER_SEC;
837 if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0)
838 log_warning_unit(UNIT(s)->id, "TCP_DEFER_ACCEPT failed: %m");
843 if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &b, sizeof(b)) < 0)
844 log_warning_unit(UNIT(s)->id, "TCP_NODELAY failed: %m");
849 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
850 log_warning_unit(UNIT(s)->id, "SO_BROADCAST failed: %m");
855 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
856 log_warning_unit(UNIT(s)->id, "SO_PASSCRED failed: %m");
861 if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
862 log_warning_unit(UNIT(s)->id, "SO_PASSSEC failed: %m");
865 if (s->priority >= 0)
866 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
867 log_warning_unit(UNIT(s)->id, "SO_PRIORITY failed: %m");
869 if (s->receive_buffer > 0) {
870 int value = (int) s->receive_buffer;
872 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
874 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
875 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
876 log_warning_unit(UNIT(s)->id, "SO_RCVBUF failed: %m");
879 if (s->send_buffer > 0) {
880 int value = (int) s->send_buffer;
881 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
882 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
883 log_warning_unit(UNIT(s)->id, "SO_SNDBUF failed: %m");
887 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
888 log_warning_unit(UNIT(s)->id, "SO_MARK failed: %m");
891 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
892 log_warning_unit(UNIT(s)->id, "IP_TOS failed: %m");
894 if (s->ip_ttl >= 0) {
897 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
899 if (socket_ipv6_is_supported())
900 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
903 errno = EAFNOSUPPORT;
907 log_warning_unit(UNIT(s)->id,
908 "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
911 if (s->tcp_congestion)
912 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
913 log_warning_unit(UNIT(s)->id, "TCP_CONGESTION failed: %m");
916 int b = s->reuse_port;
917 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &b, sizeof(b)) < 0)
918 log_warning_unit(UNIT(s)->id, "SO_REUSEPORT failed: %m");
922 if (smack_label_ip_in_fd(fd, s->smack_ip_in) < 0)
923 log_error_unit(UNIT(s)->id, "smack_label_ip_in_fd: %m");
926 if (smack_label_ip_out_fd(fd, s->smack_ip_out) < 0)
927 log_error_unit(UNIT(s)->id, "smack_label_ip_out_fd: %m");
930 static void socket_apply_fifo_options(Socket *s, int fd) {
934 if (s->pipe_size > 0)
935 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
936 log_warning_unit(UNIT(s)->id,
940 if (smack_label_fd(fd, s->smack) < 0)
941 log_error_unit(UNIT(s)->id, "smack_label_fd: %m");
944 static int fifo_address_create(
946 mode_t directory_mode,
957 mkdir_parents_label(path, directory_mode);
959 r = label_context_set(path, S_IFIFO);
963 /* Enforce the right access mode for the fifo */
964 old_mask = umask(~ socket_mode);
966 /* Include the original umask in our mask */
967 umask(~socket_mode | old_mask);
969 r = mkfifo(path, socket_mode);
972 if (r < 0 && errno != EEXIST) {
977 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
982 label_context_clear();
984 if (fstat(fd, &st) < 0) {
989 if (!S_ISFIFO(st.st_mode) ||
990 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
991 st.st_uid != getuid() ||
992 st.st_gid != getgid()) {
1002 label_context_clear();
1008 static int special_address_create(
1018 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW);
1024 if (fstat(fd, &st) < 0) {
1029 /* Check whether this is a /proc, /sys or /dev file or char device */
1030 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
1044 static int mq_address_create(
1054 struct mq_attr _attr, *attr = NULL;
1059 if (maxmsg > 0 && msgsize > 0) {
1061 _attr.mq_flags = O_NONBLOCK;
1062 _attr.mq_maxmsg = maxmsg;
1063 _attr.mq_msgsize = msgsize;
1067 /* Enforce the right access mode for the mq */
1068 old_mask = umask(~ mq_mode);
1070 /* Include the original umask in our mask */
1071 umask(~mq_mode | old_mask);
1072 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
1080 if (fstat(fd, &st) < 0) {
1085 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
1086 st.st_uid != getuid() ||
1087 st.st_gid != getgid()) {
1101 static int socket_symlink(Socket *s) {
1107 p = socket_find_symlink_target(s);
1111 STRV_FOREACH(i, s->symlinks)
1117 static int socket_open_fds(Socket *s) {
1121 bool know_label = false;
1125 LIST_FOREACH(port, p, s->ports) {
1130 if (p->type == SOCKET_SOCKET) {
1134 r = socket_instantiate_service(s);
1138 if (UNIT_ISSET(s->service) &&
1139 SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
1140 r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
1141 if (r < 0 && r != -EPERM)
1148 r = socket_address_listen(
1150 SOCK_CLOEXEC|SOCK_NONBLOCK,
1163 socket_apply_socket_options(s, p->fd);
1166 } else if (p->type == SOCKET_SPECIAL) {
1168 r = special_address_create(
1174 } else if (p->type == SOCKET_FIFO) {
1176 r = fifo_address_create(
1184 socket_apply_fifo_options(s, p->fd);
1187 } else if (p->type == SOCKET_MQUEUE) {
1189 r = mq_address_create(
1198 assert_not_reached("Unknown port type");
1205 socket_close_fds(s);
1210 static void socket_unwatch_fds(Socket *s) {
1216 LIST_FOREACH(port, p, s->ports) {
1220 if (!p->event_source)
1223 r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF);
1225 log_debug_unit(UNIT(s)->id, "Failed to disable event source.");
1229 static int socket_watch_fds(Socket *s) {
1235 LIST_FOREACH(port, p, s->ports) {
1239 if (p->event_source)
1240 r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON);
1242 r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p);
1245 log_warning_unit(UNIT(s)->id, "Failed to watch listening fds: %s", strerror(-r));
1253 socket_unwatch_fds(s);
1257 static void socket_set_state(Socket *s, SocketState state) {
1258 SocketState old_state;
1261 old_state = s->state;
1269 SOCKET_STOP_PRE_SIGTERM,
1270 SOCKET_STOP_PRE_SIGKILL,
1272 SOCKET_FINAL_SIGTERM,
1273 SOCKET_FINAL_SIGKILL)) {
1275 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1276 socket_unwatch_control_pid(s);
1277 s->control_command = NULL;
1278 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1281 if (state != SOCKET_LISTENING)
1282 socket_unwatch_fds(s);
1290 SOCKET_STOP_PRE_SIGTERM,
1291 SOCKET_STOP_PRE_SIGKILL))
1292 socket_close_fds(s);
1294 if (state != old_state)
1295 log_debug_unit(UNIT(s)->id, "%s changed %s -> %s",
1296 UNIT(s)->id, socket_state_to_string(old_state), socket_state_to_string(state));
1298 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1301 static int socket_coldplug(Unit *u) {
1302 Socket *s = SOCKET(u);
1306 assert(s->state == SOCKET_DEAD);
1308 if (s->deserialized_state == s->state)
1311 if (IN_SET(s->deserialized_state,
1316 SOCKET_STOP_PRE_SIGTERM,
1317 SOCKET_STOP_PRE_SIGKILL,
1319 SOCKET_FINAL_SIGTERM,
1320 SOCKET_FINAL_SIGKILL)) {
1322 if (s->control_pid <= 0)
1325 r = unit_watch_pid(UNIT(s), s->control_pid);
1329 r = socket_arm_timer(s);
1334 if (IN_SET(s->deserialized_state,
1340 SOCKET_STOP_PRE_SIGTERM,
1341 SOCKET_STOP_PRE_SIGKILL)) {
1342 r = socket_open_fds(s);
1347 if (s->deserialized_state == SOCKET_LISTENING) {
1348 r = socket_watch_fds(s);
1353 socket_set_state(s, s->deserialized_state);
1357 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1358 _cleanup_free_ char **argv = NULL;
1366 unit_realize_cgroup(UNIT(s));
1368 r = unit_setup_exec_runtime(UNIT(s));
1372 r = socket_arm_timer(s);
1376 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1384 UNIT(s)->manager->environment,
1388 UNIT(s)->manager->confirm_spawn,
1389 UNIT(s)->manager->cgroup_supported,
1390 UNIT(s)->cgroup_path,
1391 manager_get_runtime_prefix(UNIT(s)->manager),
1400 r = unit_watch_pid(UNIT(s), pid);
1402 /* FIXME: we need to do something here */
1409 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1413 static int socket_chown(Socket *s, pid_t *_pid) {
1417 r = socket_arm_timer(s);
1421 /* We have to resolve the user names out-of-process, hence
1422 * let's fork here. It's messy, but well, what can we do? */
1430 uid_t uid = (uid_t) -1;
1431 gid_t gid = (gid_t) -1;
1434 default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1);
1435 ignore_signals(SIGPIPE, -1);
1438 if (!isempty(s->user)) {
1439 const char *user = s->user;
1441 r = get_user_creds(&user, &uid, &gid, NULL, NULL);
1448 if (!isempty(s->group)) {
1449 const char *group = s->group;
1451 r = get_group_creds(&group, &gid);
1458 LIST_FOREACH(port, p, s->ports) {
1459 const char *path = NULL;
1461 if (p->type == SOCKET_SOCKET)
1462 path = socket_address_get_path(&p->address);
1463 else if (p->type == SOCKET_FIFO)
1469 if (chown(path, uid, gid) < 0) {
1480 log_error("Failed to chown socket at step %s: %s", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD), strerror(-r));
1485 r = unit_watch_pid(UNIT(s), pid);
1493 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1497 static void socket_enter_dead(Socket *s, SocketResult f) {
1500 if (f != SOCKET_SUCCESS)
1503 exec_runtime_destroy(s->exec_runtime);
1504 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1506 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1508 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
1511 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
1513 static void socket_enter_stop_post(Socket *s, SocketResult f) {
1517 if (f != SOCKET_SUCCESS)
1520 socket_unwatch_control_pid(s);
1521 s->control_command_id = SOCKET_EXEC_STOP_POST;
1522 s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST];
1524 if (s->control_command) {
1525 r = socket_spawn(s, s->control_command, &s->control_pid);
1529 socket_set_state(s, SOCKET_STOP_POST);
1531 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
1536 log_warning_unit(UNIT(s)->id,
1537 "%s failed to run 'stop-post' task: %s",
1538 UNIT(s)->id, strerror(-r));
1539 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1542 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
1547 if (f != SOCKET_SUCCESS)
1550 r = unit_kill_context(
1553 state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_FINAL_SIGTERM,
1561 r = socket_arm_timer(s);
1565 socket_set_state(s, state);
1566 } else if (state == SOCKET_STOP_PRE_SIGTERM)
1567 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS);
1568 else if (state == SOCKET_STOP_PRE_SIGKILL)
1569 socket_enter_stop_post(s, SOCKET_SUCCESS);
1570 else if (state == SOCKET_FINAL_SIGTERM)
1571 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS);
1573 socket_enter_dead(s, SOCKET_SUCCESS);
1578 log_warning_unit(UNIT(s)->id, "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1580 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1581 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1583 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1586 static void socket_enter_stop_pre(Socket *s, SocketResult f) {
1590 if (f != SOCKET_SUCCESS)
1593 socket_unwatch_control_pid(s);
1594 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1595 s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE];
1597 if (s->control_command) {
1598 r = socket_spawn(s, s->control_command, &s->control_pid);
1602 socket_set_state(s, SOCKET_STOP_PRE);
1604 socket_enter_stop_post(s, SOCKET_SUCCESS);
1609 log_warning_unit(UNIT(s)->id, "%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r));
1610 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1613 static void socket_enter_listening(Socket *s) {
1617 r = socket_watch_fds(s);
1619 log_warning_unit(UNIT(s)->id, "%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1623 socket_set_state(s, SOCKET_LISTENING);
1627 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1630 static void socket_enter_start_post(Socket *s) {
1634 socket_unwatch_control_pid(s);
1635 s->control_command_id = SOCKET_EXEC_START_POST;
1636 s->control_command = s->exec_command[SOCKET_EXEC_START_POST];
1638 if (s->control_command) {
1639 r = socket_spawn(s, s->control_command, &s->control_pid);
1641 log_warning_unit(UNIT(s)->id, "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
1645 socket_set_state(s, SOCKET_START_POST);
1647 socket_enter_listening(s);
1652 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1655 static void socket_enter_start_chown(Socket *s) {
1660 r = socket_open_fds(s);
1662 log_warning_unit(UNIT(s)->id, "%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
1666 if (!isempty(s->user) || !isempty(s->group)) {
1668 socket_unwatch_control_pid(s);
1669 s->control_command_id = SOCKET_EXEC_START_CHOWN;
1670 s->control_command = NULL;
1672 r = socket_chown(s, &s->control_pid);
1674 log_warning_unit(UNIT(s)->id, "%s failed to fork 'start-chown' task: %s", UNIT(s)->id, strerror(-r));
1678 socket_set_state(s, SOCKET_START_CHOWN);
1680 socket_enter_start_post(s);
1685 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1688 static void socket_enter_start_pre(Socket *s) {
1692 socket_unwatch_control_pid(s);
1693 s->control_command_id = SOCKET_EXEC_START_PRE;
1694 s->control_command = s->exec_command[SOCKET_EXEC_START_PRE];
1696 if (s->control_command) {
1697 r = socket_spawn(s, s->control_command, &s->control_pid);
1699 log_warning_unit(UNIT(s)->id, "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
1703 socket_set_state(s, SOCKET_START_PRE);
1705 socket_enter_start_chown(s);
1710 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1713 static void socket_enter_running(Socket *s, int cfd) {
1714 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1719 /* We don't take connections anymore if we are supposed to
1720 * shut down anyway */
1721 if (unit_stop_pending(UNIT(s))) {
1723 log_debug_unit(UNIT(s)->id, "Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id);
1728 /* Flush all sockets by closing and reopening them */
1729 socket_close_fds(s);
1731 r = socket_open_fds(s);
1733 log_warning_unit(UNIT(s)->id, "%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
1734 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1738 r = socket_watch_fds(s);
1740 log_warning_unit(UNIT(s)->id, "%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1741 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1751 bool pending = false;
1753 /* If there's already a start pending don't bother to
1755 SET_FOREACH(other, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
1756 if (unit_active_or_pending(other)) {
1762 if (!UNIT_ISSET(s->service)) {
1763 log_error_unit(UNIT(s)->id, "%s: service to activate vanished, refusing activation.", UNIT(s)->id);
1768 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1773 socket_set_state(s, SOCKET_RUNNING);
1775 _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL;
1778 if (s->n_connections >= s->max_connections) {
1779 log_warning_unit(UNIT(s)->id, "%s: Too many incoming connections (%u)", UNIT(s)->id, s->n_connections);
1784 r = socket_instantiate_service(s);
1788 r = instance_from_socket(cfd, s->n_accepted, &instance);
1793 /* ENOTCONN is legitimate if TCP RST was received.
1794 * This connection is over, but the socket unit lives on. */
1799 prefix = unit_name_to_prefix(UNIT(s)->id);
1805 name = unit_name_build(prefix, instance, ".service");
1811 r = unit_add_name(UNIT_DEREF(s->service), name);
1815 service = SERVICE(UNIT_DEREF(s->service));
1816 unit_ref_unset(&s->service);
1819 UNIT(service)->no_gc = false;
1821 unit_choose_id(UNIT(service), name);
1823 r = service_set_socket_fd(service, cfd, s);
1828 s->n_connections ++;
1830 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1834 /* Notify clients about changed counters */
1835 unit_add_to_dbus_queue(UNIT(s));
1841 log_warning_unit(UNIT(s)->id, "%s failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s",
1842 UNIT(s)->id, cfd >= 0 ? "template" : "non-template",
1843 bus_error_message(&error, r));
1845 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1849 static void socket_run_next(Socket *s) {
1853 assert(s->control_command);
1854 assert(s->control_command->command_next);
1856 socket_unwatch_control_pid(s);
1858 s->control_command = s->control_command->command_next;
1860 r = socket_spawn(s, s->control_command, &s->control_pid);
1867 log_warning_unit(UNIT(s)->id, "%s failed to run next task: %s", UNIT(s)->id, strerror(-r));
1869 if (s->state == SOCKET_START_POST)
1870 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1871 else if (s->state == SOCKET_STOP_POST)
1872 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1874 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1877 static int socket_start(Unit *u) {
1878 Socket *s = SOCKET(u);
1882 /* We cannot fulfill this request right now, try again later
1884 if (IN_SET(s->state,
1886 SOCKET_STOP_PRE_SIGKILL,
1887 SOCKET_STOP_PRE_SIGTERM,
1889 SOCKET_FINAL_SIGTERM,
1890 SOCKET_FINAL_SIGKILL))
1893 /* Already on it! */
1894 if (IN_SET(s->state,
1900 /* Cannot run this without the service being around */
1901 if (UNIT_ISSET(s->service)) {
1904 service = SERVICE(UNIT_DEREF(s->service));
1906 if (UNIT(service)->load_state != UNIT_LOADED) {
1907 log_error_unit(u->id, "Socket service %s not loaded, refusing.", UNIT(service)->id);
1911 /* If the service is already active we cannot start the
1913 if (service->state != SERVICE_DEAD &&
1914 service->state != SERVICE_FAILED &&
1915 service->state != SERVICE_AUTO_RESTART) {
1916 log_error_unit(u->id, "Socket service %s already active, refusing.", UNIT(service)->id);
1921 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1923 s->result = SOCKET_SUCCESS;
1924 socket_enter_start_pre(s);
1929 static int socket_stop(Unit *u) {
1930 Socket *s = SOCKET(u);
1935 if (IN_SET(s->state,
1937 SOCKET_STOP_PRE_SIGTERM,
1938 SOCKET_STOP_PRE_SIGKILL,
1940 SOCKET_FINAL_SIGTERM,
1941 SOCKET_FINAL_SIGKILL))
1944 /* If there's already something running we go directly into
1946 if (IN_SET(s->state,
1949 SOCKET_START_POST)) {
1950 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
1954 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1956 socket_enter_stop_pre(s, SOCKET_SUCCESS);
1960 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1961 Socket *s = SOCKET(u);
1969 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1970 unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
1971 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1973 if (s->control_pid > 0)
1974 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
1976 if (s->control_command_id >= 0)
1977 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1979 LIST_FOREACH(port, p, s->ports) {
1985 copy = fdset_put_dup(fds, p->fd);
1989 if (p->type == SOCKET_SOCKET) {
1990 _cleanup_free_ char *t = NULL;
1992 r = socket_address_print(&p->address, &t);
1996 if (socket_address_family(&p->address) == AF_NETLINK)
1997 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1999 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
2001 } else if (p->type == SOCKET_SPECIAL)
2002 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
2003 else if (p->type == SOCKET_MQUEUE)
2004 unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path);
2006 assert(p->type == SOCKET_FIFO);
2007 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
2014 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2015 Socket *s = SOCKET(u);
2021 if (streq(key, "state")) {
2024 state = socket_state_from_string(value);
2026 log_debug_unit(u->id, "Failed to parse state value %s", value);
2028 s->deserialized_state = state;
2029 } else if (streq(key, "result")) {
2032 f = socket_result_from_string(value);
2034 log_debug_unit(u->id, "Failed to parse result value %s", value);
2035 else if (f != SOCKET_SUCCESS)
2038 } else if (streq(key, "n-accepted")) {
2041 if (safe_atou(value, &k) < 0)
2042 log_debug_unit(u->id, "Failed to parse n-accepted value %s", value);
2045 } else if (streq(key, "control-pid")) {
2048 if (parse_pid(value, &pid) < 0)
2049 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2051 s->control_pid = pid;
2052 } else if (streq(key, "control-command")) {
2053 SocketExecCommand id;
2055 id = socket_exec_command_from_string(value);
2057 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2059 s->control_command_id = id;
2060 s->control_command = s->exec_command[id];
2062 } else if (streq(key, "fifo")) {
2066 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
2067 log_debug_unit(u->id, "Failed to parse fifo value %s", value);
2070 LIST_FOREACH(port, p, s->ports)
2071 if (p->type == SOCKET_FIFO &&
2072 streq_ptr(p->path, value+skip))
2077 p->fd = fdset_remove(fds, fd);
2081 } else if (streq(key, "special")) {
2085 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
2086 log_debug_unit(u->id, "Failed to parse special value %s", value);
2089 LIST_FOREACH(port, p, s->ports)
2090 if (p->type == SOCKET_SPECIAL &&
2091 streq_ptr(p->path, value+skip))
2096 p->fd = fdset_remove(fds, fd);
2100 } else if (streq(key, "mqueue")) {
2104 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
2105 log_debug_unit(u->id, "Failed to parse mqueue value %s", value);
2108 LIST_FOREACH(port, p, s->ports)
2109 if (p->type == SOCKET_MQUEUE &&
2110 streq_ptr(p->path, value+skip))
2115 p->fd = fdset_remove(fds, fd);
2119 } else if (streq(key, "socket")) {
2120 int fd, type, skip = 0;
2123 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
2124 log_debug_unit(u->id, "Failed to parse socket value %s", value);
2127 LIST_FOREACH(port, p, s->ports)
2128 if (socket_address_is(&p->address, value+skip, type))
2133 p->fd = fdset_remove(fds, fd);
2137 } else if (streq(key, "netlink")) {
2141 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
2142 log_debug_unit(u->id, "Failed to parse socket value %s", value);
2145 LIST_FOREACH(port, p, s->ports)
2146 if (socket_address_is_netlink(&p->address, value+skip))
2151 p->fd = fdset_remove(fds, fd);
2155 log_debug_unit(UNIT(s)->id, "Unknown serialization key '%s'", key);
2160 static int socket_distribute_fds(Unit *u, FDSet *fds) {
2161 Socket *s = SOCKET(u);
2166 LIST_FOREACH(port, p, s->ports) {
2170 if (p->type != SOCKET_SOCKET)
2176 FDSET_FOREACH(fd, fds, i) {
2177 if (socket_address_matches_fd(&p->address, fd)) {
2178 p->fd = fdset_remove(fds, fd);
2179 s->deserialized_state = SOCKET_LISTENING;
2188 _pure_ static UnitActiveState socket_active_state(Unit *u) {
2191 return state_translation_table[SOCKET(u)->state];
2194 _pure_ static const char *socket_sub_state_to_string(Unit *u) {
2197 return socket_state_to_string(SOCKET(u)->state);
2200 const char* socket_port_type_to_string(SocketPort *p) {
2208 switch (p->address.type) {
2216 case SOCK_SEQPACKET:
2217 return "SequentialPacket";
2220 if (socket_address_family(&p->address) == AF_NETLINK)
2227 case SOCKET_SPECIAL:
2231 return "MessageQueue";
2241 _pure_ static bool socket_check_gc(Unit *u) {
2242 Socket *s = SOCKET(u);
2246 return s->n_connections > 0;
2249 static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2250 SocketPort *p = userdata;
2256 if (p->socket->state != SOCKET_LISTENING)
2259 log_debug_unit(UNIT(p->socket)->id, "Incoming traffic on %s", UNIT(p->socket)->id);
2261 if (revents != EPOLLIN) {
2263 if (revents & EPOLLHUP)
2264 log_error_unit(UNIT(p->socket)->id, "%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.",
2265 UNIT(p->socket)->id);
2267 log_error_unit(UNIT(p->socket)->id, "%s: Got unexpected poll event (0x%x) on socket.",
2268 UNIT(p->socket)->id, revents);
2273 if (p->socket->accept &&
2274 p->type == SOCKET_SOCKET &&
2275 socket_address_can_accept(&p->address)) {
2279 cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK);
2285 log_error_unit(UNIT(p->socket)->id,
2286 "Failed to accept socket: %m");
2293 socket_apply_socket_options(p->socket, cfd);
2296 socket_enter_running(p->socket, cfd);
2300 socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES);
2304 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2305 Socket *s = SOCKET(u);
2311 if (pid != s->control_pid)
2316 if (is_clean_exit(code, status, NULL))
2318 else if (code == CLD_EXITED)
2319 f = SOCKET_FAILURE_EXIT_CODE;
2320 else if (code == CLD_KILLED)
2321 f = SOCKET_FAILURE_SIGNAL;
2322 else if (code == CLD_DUMPED)
2323 f = SOCKET_FAILURE_CORE_DUMP;
2325 assert_not_reached("Unknown sigchld code");
2327 if (s->control_command) {
2328 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2330 if (s->control_command->ignore)
2334 log_full_unit(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2336 "%s control process exited, code=%s status=%i",
2337 u->id, sigchld_code_to_string(code), status);
2339 if (f != SOCKET_SUCCESS)
2342 if (s->control_command &&
2343 s->control_command->command_next &&
2344 f == SOCKET_SUCCESS) {
2346 log_debug_unit(u->id,
2347 "%s running next command for state %s",
2348 u->id, socket_state_to_string(s->state));
2351 s->control_command = NULL;
2352 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
2354 /* No further commands for this step, so let's figure
2355 * out what to do next */
2357 log_debug_unit(u->id,
2358 "%s got final SIGCHLD for state %s",
2359 u->id, socket_state_to_string(s->state));
2363 case SOCKET_START_PRE:
2364 if (f == SOCKET_SUCCESS)
2365 socket_enter_start_chown(s);
2367 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
2370 case SOCKET_START_CHOWN:
2371 if (f == SOCKET_SUCCESS)
2372 socket_enter_start_post(s);
2374 socket_enter_stop_pre(s, f);
2377 case SOCKET_START_POST:
2378 if (f == SOCKET_SUCCESS)
2379 socket_enter_listening(s);
2381 socket_enter_stop_pre(s, f);
2384 case SOCKET_STOP_PRE:
2385 case SOCKET_STOP_PRE_SIGTERM:
2386 case SOCKET_STOP_PRE_SIGKILL:
2387 socket_enter_stop_post(s, f);
2390 case SOCKET_STOP_POST:
2391 case SOCKET_FINAL_SIGTERM:
2392 case SOCKET_FINAL_SIGKILL:
2393 socket_enter_dead(s, f);
2397 assert_not_reached("Uh, control process died at wrong time.");
2401 /* Notify clients about changed exit status */
2402 unit_add_to_dbus_queue(u);
2405 static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2406 Socket *s = SOCKET(userdata);
2409 assert(s->timer_event_source == source);
2413 case SOCKET_START_PRE:
2414 log_warning_unit(UNIT(s)->id, "%s starting timed out. Terminating.", UNIT(s)->id);
2415 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2418 case SOCKET_START_CHOWN:
2419 case SOCKET_START_POST:
2420 log_warning_unit(UNIT(s)->id, "%s starting timed out. Stopping.", UNIT(s)->id);
2421 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
2424 case SOCKET_STOP_PRE:
2425 log_warning_unit(UNIT(s)->id, "%s stopping timed out. Terminating.", UNIT(s)->id);
2426 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2429 case SOCKET_STOP_PRE_SIGTERM:
2430 if (s->kill_context.send_sigkill) {
2431 log_warning_unit(UNIT(s)->id, "%s stopping timed out. Killing.", UNIT(s)->id);
2432 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
2434 log_warning_unit(UNIT(s)->id, "%s stopping timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id);
2435 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
2439 case SOCKET_STOP_PRE_SIGKILL:
2440 log_warning_unit(UNIT(s)->id, "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
2441 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
2444 case SOCKET_STOP_POST:
2445 log_warning_unit(UNIT(s)->id, "%s stopping timed out (2). Terminating.", UNIT(s)->id);
2446 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2449 case SOCKET_FINAL_SIGTERM:
2450 if (s->kill_context.send_sigkill) {
2451 log_warning_unit(UNIT(s)->id, "%s stopping timed out (2). Killing.", UNIT(s)->id);
2452 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
2454 log_warning_unit(UNIT(s)->id, "%s stopping timed out (2). Skipping SIGKILL. Ignoring.", UNIT(s)->id);
2455 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2459 case SOCKET_FINAL_SIGKILL:
2460 log_warning_unit(UNIT(s)->id, "%s still around after SIGKILL (2). Entering failed mode.", UNIT(s)->id);
2461 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2465 assert_not_reached("Timeout at wrong time.");
2471 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2480 /* Called from the service code for requesting our fds */
2483 LIST_FOREACH(port, p, s->ports)
2493 if (!(rfds = new(int, rn_fds)))
2497 LIST_FOREACH(port, p, s->ports)
2501 assert(k == rn_fds);
2509 static void socket_reset_failed(Unit *u) {
2510 Socket *s = SOCKET(u);
2514 if (s->state == SOCKET_FAILED)
2515 socket_set_state(s, SOCKET_DEAD);
2517 s->result = SOCKET_SUCCESS;
2520 static void socket_notify_service_dead(Socket *s, bool failed_permanent) {
2523 /* The service is dead. Dang!
2525 * This is strictly for one-instance-for-all-connections
2528 if (s->state == SOCKET_RUNNING) {
2529 log_debug_unit(UNIT(s)->id, "%s got notified about service death (failed permanently: %s)", UNIT(s)->id, yes_no(failed_permanent));
2530 if (failed_permanent)
2531 socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT);
2533 socket_enter_listening(s);
2537 void socket_connection_unref(Socket *s) {
2540 /* The service is dead. Yay!
2542 * This is strictly for one-instance-per-connection
2545 assert(s->n_connections > 0);
2548 log_debug_unit(UNIT(s)->id, "%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
2551 static void socket_trigger_notify(Unit *u, Unit *other) {
2552 Socket *s = SOCKET(u);
2558 /* Don't propagate state changes from the service if we are
2559 already down or accepting connections */
2560 if ((s->state != SOCKET_RUNNING &&
2561 s->state != SOCKET_LISTENING) ||
2565 if (other->load_state != UNIT_LOADED ||
2566 other->type != UNIT_SERVICE)
2569 se = SERVICE(other);
2571 if (se->state == SERVICE_FAILED)
2572 socket_notify_service_dead(s, se->result == SERVICE_FAILURE_START_LIMIT);
2574 if (se->state == SERVICE_DEAD ||
2575 se->state == SERVICE_STOP ||
2576 se->state == SERVICE_STOP_SIGTERM ||
2577 se->state == SERVICE_STOP_SIGKILL ||
2578 se->state == SERVICE_STOP_POST ||
2579 se->state == SERVICE_FINAL_SIGTERM ||
2580 se->state == SERVICE_FINAL_SIGKILL ||
2581 se->state == SERVICE_AUTO_RESTART)
2582 socket_notify_service_dead(s, false);
2584 if (se->state == SERVICE_RUNNING)
2585 socket_set_state(s, SOCKET_RUNNING);
2588 static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
2589 return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error);
2592 static int socket_get_timeout(Unit *u, uint64_t *timeout) {
2593 Socket *s = SOCKET(u);
2596 if (!s->timer_event_source)
2599 r = sd_event_source_get_time(s->timer_event_source, timeout);
2606 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2607 [SOCKET_DEAD] = "dead",
2608 [SOCKET_START_PRE] = "start-pre",
2609 [SOCKET_START_CHOWN] = "start-chown",
2610 [SOCKET_START_POST] = "start-post",
2611 [SOCKET_LISTENING] = "listening",
2612 [SOCKET_RUNNING] = "running",
2613 [SOCKET_STOP_PRE] = "stop-pre",
2614 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2615 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2616 [SOCKET_STOP_POST] = "stop-post",
2617 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2618 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2619 [SOCKET_FAILED] = "failed"
2622 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2624 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2625 [SOCKET_EXEC_START_PRE] = "StartPre",
2626 [SOCKET_EXEC_START_CHOWN] = "StartChown",
2627 [SOCKET_EXEC_START_POST] = "StartPost",
2628 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2629 [SOCKET_EXEC_STOP_POST] = "StopPost"
2632 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2634 static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2635 [SOCKET_SUCCESS] = "success",
2636 [SOCKET_FAILURE_RESOURCES] = "resources",
2637 [SOCKET_FAILURE_TIMEOUT] = "timeout",
2638 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2639 [SOCKET_FAILURE_SIGNAL] = "signal",
2640 [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
2641 [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent"
2644 DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2646 const UnitVTable socket_vtable = {
2647 .object_size = sizeof(Socket),
2648 .exec_context_offset = offsetof(Socket, exec_context),
2649 .cgroup_context_offset = offsetof(Socket, cgroup_context),
2650 .kill_context_offset = offsetof(Socket, kill_context),
2651 .exec_runtime_offset = offsetof(Socket, exec_runtime),
2657 .private_section = "Socket",
2659 .init = socket_init,
2660 .done = socket_done,
2661 .load = socket_load,
2663 .coldplug = socket_coldplug,
2665 .dump = socket_dump,
2667 .start = socket_start,
2668 .stop = socket_stop,
2670 .kill = socket_kill,
2672 .get_timeout = socket_get_timeout,
2674 .serialize = socket_serialize,
2675 .deserialize_item = socket_deserialize_item,
2676 .distribute_fds = socket_distribute_fds,
2678 .active_state = socket_active_state,
2679 .sub_state_to_string = socket_sub_state_to_string,
2681 .check_gc = socket_check_gc,
2683 .sigchld_event = socket_sigchld_event,
2685 .trigger_notify = socket_trigger_notify,
2687 .reset_failed = socket_reset_failed,
2689 .bus_interface = "org.freedesktop.systemd1.Socket",
2690 .bus_vtable = bus_socket_vtable,
2691 .bus_set_property = bus_socket_set_property,
2692 .bus_commit_properties = bus_socket_commit_properties,
2694 .status_message_formats = {
2695 /*.starting_stopping = {
2696 [0] = "Starting socket %s...",
2697 [1] = "Stopping socket %s...",
2699 .finished_start_job = {
2700 [JOB_DONE] = "Listening on %s.",
2701 [JOB_FAILED] = "Failed to listen on %s.",
2702 [JOB_DEPENDENCY] = "Dependency failed for %s.",
2703 [JOB_TIMEOUT] = "Timed out starting %s.",
2705 .finished_stop_job = {
2706 [JOB_DONE] = "Closed %s.",
2707 [JOB_FAILED] = "Failed stopping %s.",
2708 [JOB_TIMEOUT] = "Timed out stopping %s.",