summaryrefslogtreecommitdiff
path: root/src/libcore/socket.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libcore/socket.c')
-rw-r--r--src/libcore/socket.c2866
1 files changed, 2866 insertions, 0 deletions
diff --git a/src/libcore/socket.c b/src/libcore/socket.c
new file mode 100644
index 0000000000..f36e312f7b
--- /dev/null
+++ b/src/libcore/socket.c
@@ -0,0 +1,2866 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <mqueue.h>
+#include <netinet/tcp.h>
+#include <signal.h>
+#include <sys/epoll.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <linux/sctp.h>
+
+#include <systemd/sd-event.h>
+#include "alloc-util.h"
+#include "bus-error.h"
+#include "bus-util.h"
+#include "copy.h"
+#include "dbus-socket.h"
+#include "def.h"
+#include "exit-status.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "label.h"
+#include "log.h"
+#include "missing.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "selinux-util.h"
+#include "signal-util.h"
+#include "smack-util.h"
+#include "socket.h"
+#include "special.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "unit-name.h"
+#include "unit-printf.h"
+#include "unit.h"
+#include "user-util.h"
+
+static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
+ [SOCKET_DEAD] = UNIT_INACTIVE,
+ [SOCKET_START_PRE] = UNIT_ACTIVATING,
+ [SOCKET_START_CHOWN] = UNIT_ACTIVATING,
+ [SOCKET_START_POST] = UNIT_ACTIVATING,
+ [SOCKET_LISTENING] = UNIT_ACTIVE,
+ [SOCKET_RUNNING] = UNIT_ACTIVE,
+ [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
+ [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
+ [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
+ [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
+ [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
+ [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
+ [SOCKET_FAILED] = UNIT_FAILED
+};
+
+static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
+static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
+
+static void socket_init(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(u);
+ assert(u->load_state == UNIT_STUB);
+
+ s->backlog = SOMAXCONN;
+ s->timeout_usec = u->manager->default_timeout_start_usec;
+ s->directory_mode = 0755;
+ s->socket_mode = 0666;
+
+ s->max_connections = 64;
+
+ s->priority = -1;
+ s->ip_tos = -1;
+ s->ip_ttl = -1;
+ s->mark = -1;
+
+ s->exec_context.std_output = u->manager->default_std_output;
+ s->exec_context.std_error = u->manager->default_std_error;
+
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+}
+
+static void socket_unwatch_control_pid(Socket *s) {
+ assert(s);
+
+ if (s->control_pid <= 0)
+ return;
+
+ unit_unwatch_pid(UNIT(s), s->control_pid);
+ s->control_pid = 0;
+}
+
+static void socket_cleanup_fd_list(SocketPort *p) {
+ assert(p);
+
+ close_many(p->auxiliary_fds, p->n_auxiliary_fds);
+ p->auxiliary_fds = mfree(p->auxiliary_fds);
+ p->n_auxiliary_fds = 0;
+}
+
+void socket_free_ports(Socket *s) {
+ SocketPort *p;
+
+ assert(s);
+
+ while ((p = s->ports)) {
+ LIST_REMOVE(port, s->ports, p);
+
+ sd_event_source_unref(p->event_source);
+
+ socket_cleanup_fd_list(p);
+ safe_close(p->fd);
+ free(p->path);
+ free(p);
+ }
+}
+
+static void socket_done(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ socket_free_ports(s);
+
+ s->exec_runtime = exec_runtime_unref(s->exec_runtime);
+ exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
+ s->control_command = NULL;
+
+ socket_unwatch_control_pid(s);
+
+ unit_ref_unset(&s->service);
+
+ s->tcp_congestion = mfree(s->tcp_congestion);
+ s->bind_to_device = mfree(s->bind_to_device);
+
+ s->smack = mfree(s->smack);
+ s->smack_ip_in = mfree(s->smack_ip_in);
+ s->smack_ip_out = mfree(s->smack_ip_out);
+
+ strv_free(s->symlinks);
+
+ s->user = mfree(s->user);
+ s->group = mfree(s->group);
+
+ s->fdname = mfree(s->fdname);
+
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
+}
+
+static int socket_arm_timer(Socket *s, usec_t usec) {
+ int r;
+
+ assert(s);
+
+ if (s->timer_event_source) {
+ r = sd_event_source_set_time(s->timer_event_source, usec);
+ if (r < 0)
+ return r;
+
+ return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
+ }
+
+ if (usec == USEC_INFINITY)
+ return 0;
+
+ r = sd_event_add_time(
+ UNIT(s)->manager->event,
+ &s->timer_event_source,
+ CLOCK_MONOTONIC,
+ usec, 0,
+ socket_dispatch_timer, s);
+ if (r < 0)
+ return r;
+
+ (void) sd_event_source_set_description(s->timer_event_source, "socket-timer");
+
+ return 0;
+}
+
+int socket_instantiate_service(Socket *s) {
+ _cleanup_free_ char *prefix = NULL, *name = NULL;
+ int r;
+ Unit *u;
+
+ assert(s);
+
+ /* This fills in s->service if it isn't filled in yet. For
+ * Accept=yes sockets we create the next connection service
+ * here. For Accept=no this is mostly a NOP since the service
+ * is figured out at load time anyway. */
+
+ if (UNIT_DEREF(s->service))
+ return 0;
+
+ if (!s->accept)
+ return 0;
+
+ r = unit_name_to_prefix(UNIT(s)->id, &prefix);
+ if (r < 0)
+ return r;
+
+ if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0)
+ return -ENOMEM;
+
+ r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
+ if (r < 0)
+ return r;
+
+ u->no_gc = true;
+ unit_ref_set(&s->service, u);
+
+ return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
+}
+
+static bool have_non_accept_socket(Socket *s) {
+ SocketPort *p;
+
+ assert(s);
+
+ if (!s->accept)
+ return true;
+
+ LIST_FOREACH(port, p, s->ports) {
+
+ if (p->type != SOCKET_SOCKET)
+ return true;
+
+ if (!socket_address_can_accept(&p->address))
+ return true;
+ }
+
+ return false;
+}
+
+static int socket_add_mount_links(Socket *s) {
+ SocketPort *p;
+ int r;
+
+ assert(s);
+
+ LIST_FOREACH(port, p, s->ports) {
+ const char *path = NULL;
+
+ if (p->type == SOCKET_SOCKET)
+ path = socket_address_get_path(&p->address);
+ else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION))
+ path = p->path;
+
+ if (!path)
+ continue;
+
+ r = unit_require_mounts_for(UNIT(s), path);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int socket_add_device_link(Socket *s) {
+ char *t;
+
+ assert(s);
+
+ if (!s->bind_to_device || streq(s->bind_to_device, "lo"))
+ return 0;
+
+ t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device);
+ return unit_add_node_link(UNIT(s), t, false, UNIT_BINDS_TO);
+}
+
+static int socket_add_default_dependencies(Socket *s) {
+ int r;
+ assert(s);
+
+ if (!UNIT(s)->default_dependencies)
+ return 0;
+
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+
+ if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
+ r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+ }
+
+ return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+}
+
+_pure_ static bool socket_has_exec(Socket *s) {
+ unsigned i;
+ assert(s);
+
+ for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
+ if (s->exec_command[i])
+ return true;
+
+ return false;
+}
+
+static int socket_add_extras(Socket *s) {
+ Unit *u = UNIT(s);
+ int r;
+
+ assert(s);
+
+ if (have_non_accept_socket(s)) {
+
+ if (!UNIT_DEREF(s->service)) {
+ Unit *x;
+
+ r = unit_load_related_unit(u, ".service", &x);
+ if (r < 0)
+ return r;
+
+ unit_ref_set(&s->service, x);
+ }
+
+ r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
+ if (r < 0)
+ return r;
+ }
+
+ r = socket_add_mount_links(s);
+ if (r < 0)
+ return r;
+
+ r = socket_add_device_link(s);
+ if (r < 0)
+ return r;
+
+ r = unit_patch_contexts(u);
+ if (r < 0)
+ return r;
+
+ if (socket_has_exec(s)) {
+ r = unit_add_exec_dependencies(u, &s->exec_context);
+ if (r < 0)
+ return r;
+
+ r = unit_set_default_slice(u);
+ if (r < 0)
+ return r;
+ }
+
+ r = socket_add_default_dependencies(s);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static const char *socket_find_symlink_target(Socket *s) {
+ const char *found = NULL;
+ SocketPort *p;
+
+ LIST_FOREACH(port, p, s->ports) {
+ const char *f = NULL;
+
+ switch (p->type) {
+
+ case SOCKET_FIFO:
+ f = p->path;
+ break;
+
+ case SOCKET_SOCKET:
+ if (p->address.sockaddr.un.sun_path[0] != 0)
+ f = p->address.sockaddr.un.sun_path;
+ break;
+
+ default:
+ break;
+ }
+
+ if (f) {
+ if (found)
+ return NULL;
+
+ found = f;
+ }
+ }
+
+ return found;
+}
+
+static int socket_verify(Socket *s) {
+ assert(s);
+
+ if (UNIT(s)->load_state != UNIT_LOADED)
+ return 0;
+
+ if (!s->ports) {
+ log_unit_error(UNIT(s), "Unit lacks Listen setting. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->accept && have_non_accept_socket(s)) {
+ log_unit_error(UNIT(s), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->accept && s->max_connections <= 0) {
+ log_unit_error(UNIT(s), "MaxConnection= setting too small. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->accept && UNIT_DEREF(s->service)) {
+ log_unit_error(UNIT(s), "Explicit service configuration for accepting socket units not supported. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
+ log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing.");
+ return -EINVAL;
+ }
+
+ if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) {
+ log_unit_error(UNIT(s), "Unit has symlinks set but none or more than one node in the file system. Refusing.");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int socket_load(Unit *u) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(u);
+ assert(u->load_state == UNIT_STUB);
+
+ r = unit_load_fragment_and_dropin(u);
+ if (r < 0)
+ return r;
+
+ if (u->load_state == UNIT_LOADED) {
+ /* This is a new unit? Then let's add in some extras */
+ r = socket_add_extras(s);
+ if (r < 0)
+ return r;
+ }
+
+ return socket_verify(s);
+}
+
+_const_ static const char* listen_lookup(int family, int type) {
+
+ if (family == AF_NETLINK)
+ return "ListenNetlink";
+
+ if (type == SOCK_STREAM)
+ return "ListenStream";
+ else if (type == SOCK_DGRAM)
+ return "ListenDatagram";
+ else if (type == SOCK_SEQPACKET)
+ return "ListenSequentialPacket";
+
+ assert_not_reached("Unknown socket type");
+ return NULL;
+}
+
+static void socket_dump(Unit *u, FILE *f, const char *prefix) {
+ char time_string[FORMAT_TIMESPAN_MAX];
+ SocketExecCommand c;
+ Socket *s = SOCKET(u);
+ SocketPort *p;
+ const char *prefix2;
+
+ assert(s);
+ assert(f);
+
+ prefix = strempty(prefix);
+ prefix2 = strjoina(prefix, "\t");
+
+ fprintf(f,
+ "%sSocket State: %s\n"
+ "%sResult: %s\n"
+ "%sBindIPv6Only: %s\n"
+ "%sBacklog: %u\n"
+ "%sSocketMode: %04o\n"
+ "%sDirectoryMode: %04o\n"
+ "%sKeepAlive: %s\n"
+ "%sNoDelay: %s\n"
+ "%sFreeBind: %s\n"
+ "%sTransparent: %s\n"
+ "%sBroadcast: %s\n"
+ "%sPassCredentials: %s\n"
+ "%sPassSecurity: %s\n"
+ "%sTCPCongestion: %s\n"
+ "%sRemoveOnStop: %s\n"
+ "%sWritable: %s\n"
+ "%sFDName: %s\n"
+ "%sSELinuxContextFromNet: %s\n",
+ prefix, socket_state_to_string(s->state),
+ prefix, socket_result_to_string(s->result),
+ prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
+ prefix, s->backlog,
+ prefix, s->socket_mode,
+ prefix, s->directory_mode,
+ prefix, yes_no(s->keep_alive),
+ prefix, yes_no(s->no_delay),
+ prefix, yes_no(s->free_bind),
+ prefix, yes_no(s->transparent),
+ prefix, yes_no(s->broadcast),
+ prefix, yes_no(s->pass_cred),
+ prefix, yes_no(s->pass_sec),
+ prefix, strna(s->tcp_congestion),
+ prefix, yes_no(s->remove_on_stop),
+ prefix, yes_no(s->writable),
+ prefix, socket_fdname(s),
+ prefix, yes_no(s->selinux_context_from_net));
+
+ if (s->control_pid > 0)
+ fprintf(f,
+ "%sControl PID: "PID_FMT"\n",
+ prefix, s->control_pid);
+
+ if (s->bind_to_device)
+ fprintf(f,
+ "%sBindToDevice: %s\n",
+ prefix, s->bind_to_device);
+
+ if (s->accept)
+ fprintf(f,
+ "%sAccepted: %u\n"
+ "%sNConnections: %u\n"
+ "%sMaxConnections: %u\n",
+ prefix, s->n_accepted,
+ prefix, s->n_connections,
+ prefix, s->max_connections);
+
+ if (s->priority >= 0)
+ fprintf(f,
+ "%sPriority: %i\n",
+ prefix, s->priority);
+
+ if (s->receive_buffer > 0)
+ fprintf(f,
+ "%sReceiveBuffer: %zu\n",
+ prefix, s->receive_buffer);
+
+ if (s->send_buffer > 0)
+ fprintf(f,
+ "%sSendBuffer: %zu\n",
+ prefix, s->send_buffer);
+
+ if (s->ip_tos >= 0)
+ fprintf(f,
+ "%sIPTOS: %i\n",
+ prefix, s->ip_tos);
+
+ if (s->ip_ttl >= 0)
+ fprintf(f,
+ "%sIPTTL: %i\n",
+ prefix, s->ip_ttl);
+
+ if (s->pipe_size > 0)
+ fprintf(f,
+ "%sPipeSize: %zu\n",
+ prefix, s->pipe_size);
+
+ if (s->mark >= 0)
+ fprintf(f,
+ "%sMark: %i\n",
+ prefix, s->mark);
+
+ if (s->mq_maxmsg > 0)
+ fprintf(f,
+ "%sMessageQueueMaxMessages: %li\n",
+ prefix, s->mq_maxmsg);
+
+ if (s->mq_msgsize > 0)
+ fprintf(f,
+ "%sMessageQueueMessageSize: %li\n",
+ prefix, s->mq_msgsize);
+
+ if (s->reuse_port)
+ fprintf(f,
+ "%sReusePort: %s\n",
+ prefix, yes_no(s->reuse_port));
+
+ if (s->smack)
+ fprintf(f,
+ "%sSmackLabel: %s\n",
+ prefix, s->smack);
+
+ if (s->smack_ip_in)
+ fprintf(f,
+ "%sSmackLabelIPIn: %s\n",
+ prefix, s->smack_ip_in);
+
+ if (s->smack_ip_out)
+ fprintf(f,
+ "%sSmackLabelIPOut: %s\n",
+ prefix, s->smack_ip_out);
+
+ if (!isempty(s->user) || !isempty(s->group))
+ fprintf(f,
+ "%sOwnerUser: %s\n"
+ "%sOwnerGroup: %s\n",
+ prefix, strna(s->user),
+ prefix, strna(s->group));
+
+ if (s->keep_alive_time > 0)
+ fprintf(f,
+ "%sKeepAliveTimeSec: %s\n",
+ prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC));
+
+ if (s->keep_alive_interval)
+ fprintf(f,
+ "%sKeepAliveIntervalSec: %s\n",
+ prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC));
+
+ if (s->keep_alive_cnt)
+ fprintf(f,
+ "%sKeepAliveProbes: %u\n",
+ prefix, s->keep_alive_cnt);
+
+ if (s->defer_accept)
+ fprintf(f,
+ "%sDeferAcceptSec: %s\n",
+ prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC));
+
+ LIST_FOREACH(port, p, s->ports) {
+
+ if (p->type == SOCKET_SOCKET) {
+ const char *t;
+ int r;
+ char *k = NULL;
+
+ r = socket_address_print(&p->address, &k);
+ if (r < 0)
+ t = strerror(-r);
+ else
+ t = k;
+
+ fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
+ free(k);
+ } else if (p->type == SOCKET_SPECIAL)
+ fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
+ else if (p->type == SOCKET_USB_FUNCTION)
+ fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path);
+ else if (p->type == SOCKET_MQUEUE)
+ fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
+ else
+ fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
+ }
+
+ exec_context_dump(&s->exec_context, f, prefix);
+ kill_context_dump(&s->kill_context, f, prefix);
+
+ for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
+ if (!s->exec_command[c])
+ continue;
+
+ fprintf(f, "%s-> %s:\n",
+ prefix, socket_exec_command_to_string(c));
+
+ exec_command_dump_list(s->exec_command[c], f, prefix2);
+ }
+}
+
+static int instance_from_socket(int fd, unsigned nr, char **instance) {
+ socklen_t l;
+ char *r;
+ union sockaddr_union local, remote;
+
+ assert(fd >= 0);
+ assert(instance);
+
+ l = sizeof(local);
+ if (getsockname(fd, &local.sa, &l) < 0)
+ return -errno;
+
+ l = sizeof(remote);
+ if (getpeername(fd, &remote.sa, &l) < 0)
+ return -errno;
+
+ switch (local.sa.sa_family) {
+
+ case AF_INET: {
+ uint32_t
+ a = ntohl(local.in.sin_addr.s_addr),
+ b = ntohl(remote.in.sin_addr.s_addr);
+
+ if (asprintf(&r,
+ "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
+ nr,
+ a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
+ ntohs(local.in.sin_port),
+ b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
+ ntohs(remote.in.sin_port)) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ case AF_INET6: {
+ static const unsigned char ipv4_prefix[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
+ };
+
+ if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
+ memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
+ const uint8_t
+ *a = local.in6.sin6_addr.s6_addr+12,
+ *b = remote.in6.sin6_addr.s6_addr+12;
+
+ if (asprintf(&r,
+ "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
+ nr,
+ a[0], a[1], a[2], a[3],
+ ntohs(local.in6.sin6_port),
+ b[0], b[1], b[2], b[3],
+ ntohs(remote.in6.sin6_port)) < 0)
+ return -ENOMEM;
+ } else {
+ char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
+
+ if (asprintf(&r,
+ "%u-%s:%u-%s:%u",
+ nr,
+ inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
+ ntohs(local.in6.sin6_port),
+ inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
+ ntohs(remote.in6.sin6_port)) < 0)
+ return -ENOMEM;
+ }
+
+ break;
+ }
+
+ case AF_UNIX: {
+ struct ucred ucred;
+ int k;
+
+ k = getpeercred(fd, &ucred);
+ if (k >= 0) {
+ if (asprintf(&r,
+ "%u-"PID_FMT"-"UID_FMT,
+ nr, ucred.pid, ucred.uid) < 0)
+ return -ENOMEM;
+ } else if (k == -ENODATA) {
+ /* This handles the case where somebody is
+ * connecting from another pid/uid namespace
+ * (e.g. from outside of our container). */
+ if (asprintf(&r,
+ "%u-unknown",
+ nr) < 0)
+ return -ENOMEM;
+ } else
+ return k;
+
+ break;
+ }
+
+ default:
+ assert_not_reached("Unhandled socket type.");
+ }
+
+ *instance = r;
+ return 0;
+}
+
+static void socket_close_fds(Socket *s) {
+ SocketPort *p;
+ char **i;
+
+ assert(s);
+
+ LIST_FOREACH(port, p, s->ports) {
+
+ p->event_source = sd_event_source_unref(p->event_source);
+
+ if (p->fd < 0)
+ continue;
+
+ p->fd = safe_close(p->fd);
+ socket_cleanup_fd_list(p);
+
+ /* One little note: we should normally not delete any
+ * sockets in the file system here! After all some
+ * other process we spawned might still have a
+ * reference of this fd and wants to continue to use
+ * it. Therefore we delete sockets in the file system
+ * before we create a new one, not after we stopped
+ * using one! */
+
+ if (s->remove_on_stop) {
+ switch (p->type) {
+
+ case SOCKET_FIFO:
+ unlink(p->path);
+ break;
+
+ case SOCKET_MQUEUE:
+ mq_unlink(p->path);
+ break;
+
+ case SOCKET_SOCKET:
+ socket_address_unlink(&p->address);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ if (s->remove_on_stop)
+ STRV_FOREACH(i, s->symlinks)
+ unlink(*i);
+}
+
+static void socket_apply_socket_options(Socket *s, int fd) {
+ int r;
+
+ assert(s);
+ assert(fd >= 0);
+
+ if (s->keep_alive) {
+ int b = s->keep_alive;
+ if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_KEEPALIVE failed: %m");
+ }
+
+ if (s->keep_alive_time) {
+ int value = s->keep_alive_time / USEC_PER_SEC;
+ if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPIDLE failed: %m");
+ }
+
+ if (s->keep_alive_interval) {
+ int value = s->keep_alive_interval / USEC_PER_SEC;
+ if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPINTVL failed: %m");
+ }
+
+ if (s->keep_alive_cnt) {
+ int value = s->keep_alive_cnt;
+ if (setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPCNT failed: %m");
+ }
+
+ if (s->defer_accept) {
+ int value = s->defer_accept / USEC_PER_SEC;
+ if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_DEFER_ACCEPT failed: %m");
+ }
+
+ if (s->no_delay) {
+ int b = s->no_delay;
+
+ if (s->socket_protocol == IPPROTO_SCTP) {
+ if (setsockopt(fd, SOL_SCTP, SCTP_NODELAY, &b, sizeof(b)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SCTP_NODELAY failed: %m");
+ } else {
+ if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &b, sizeof(b)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_NODELAY failed: %m");
+ }
+ }
+
+ if (s->broadcast) {
+ int one = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_BROADCAST failed: %m");
+ }
+
+ if (s->pass_cred) {
+ int one = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_PASSCRED failed: %m");
+ }
+
+ if (s->pass_sec) {
+ int one = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_PASSSEC failed: %m");
+ }
+
+ if (s->priority >= 0)
+ if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_PRIORITY failed: %m");
+
+ if (s->receive_buffer > 0) {
+ int value = (int) s->receive_buffer;
+
+ /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
+
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_RCVBUF failed: %m");
+ }
+
+ if (s->send_buffer > 0) {
+ int value = (int) s->send_buffer;
+ if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
+ if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_SNDBUF failed: %m");
+ }
+
+ if (s->mark >= 0)
+ if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "SO_MARK failed: %m");
+
+ if (s->ip_tos >= 0)
+ if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "IP_TOS failed: %m");
+
+ if (s->ip_ttl >= 0) {
+ int x;
+
+ r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
+
+ if (socket_ipv6_is_supported())
+ x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
+ else {
+ x = -1;
+ errno = EAFNOSUPPORT;
+ }
+
+ if (r < 0 && x < 0)
+ log_unit_warning_errno(UNIT(s), errno, "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
+ }
+
+ if (s->tcp_congestion)
+ if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m");
+
+ if (s->smack_ip_in) {
+ r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in);
+ if (r < 0)
+ log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m");
+ }
+
+ if (s->smack_ip_out) {
+ r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out);
+ if (r < 0)
+ log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m");
+ }
+}
+
+static void socket_apply_fifo_options(Socket *s, int fd) {
+ int r;
+
+ assert(s);
+ assert(fd >= 0);
+
+ if (s->pipe_size > 0)
+ if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
+ log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m");
+
+ if (s->smack) {
+ r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack);
+ if (r < 0)
+ log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m");
+ }
+}
+
+static int fifo_address_create(
+ const char *path,
+ mode_t directory_mode,
+ mode_t socket_mode) {
+
+ _cleanup_close_ int fd = -1;
+ mode_t old_mask;
+ struct stat st;
+ int r;
+
+ assert(path);
+
+ mkdir_parents_label(path, directory_mode);
+
+ r = mac_selinux_create_file_prepare(path, S_IFIFO);
+ if (r < 0)
+ return r;
+
+ /* Enforce the right access mode for the fifo */
+ old_mask = umask(~ socket_mode);
+
+ /* Include the original umask in our mask */
+ (void) umask(~socket_mode | old_mask);
+
+ r = mkfifo(path, socket_mode);
+ (void) umask(old_mask);
+
+ if (r < 0 && errno != EEXIST) {
+ r = -errno;
+ goto fail;
+ }
+
+ fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW);
+ if (fd < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ mac_selinux_create_file_clear();
+
+ if (fstat(fd, &st) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (!S_ISFIFO(st.st_mode) ||
+ (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
+ st.st_uid != getuid() ||
+ st.st_gid != getgid()) {
+ r = -EEXIST;
+ goto fail;
+ }
+
+ r = fd;
+ fd = -1;
+
+ return r;
+
+fail:
+ mac_selinux_create_file_clear();
+ return r;
+}
+
+static int special_address_create(const char *path, bool writable) {
+ _cleanup_close_ int fd = -1;
+ struct stat st;
+ int r;
+
+ assert(path);
+
+ fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW);
+ if (fd < 0)
+ return -errno;
+
+ if (fstat(fd, &st) < 0)
+ return -errno;
+
+ /* Check whether this is a /proc, /sys or /dev file or char device */
+ if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode))
+ return -EEXIST;
+
+ r = fd;
+ fd = -1;
+
+ return r;
+}
+
+static int usbffs_address_create(const char *path) {
+ _cleanup_close_ int fd = -1;
+ struct stat st;
+ int r;
+
+ assert(path);
+
+ fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW);
+ if (fd < 0)
+ return -errno;
+
+ if (fstat(fd, &st) < 0)
+ return -errno;
+
+ /* Check whether this is a regular file (ffs endpoint)*/
+ if (!S_ISREG(st.st_mode))
+ return -EEXIST;
+
+ r = fd;
+ fd = -1;
+
+ return r;
+}
+
+static int mq_address_create(
+ const char *path,
+ mode_t mq_mode,
+ long maxmsg,
+ long msgsize) {
+
+ _cleanup_close_ int fd = -1;
+ struct stat st;
+ mode_t old_mask;
+ struct mq_attr _attr, *attr = NULL;
+ int r;
+
+ assert(path);
+
+ if (maxmsg > 0 && msgsize > 0) {
+ _attr = (struct mq_attr) {
+ .mq_flags = O_NONBLOCK,
+ .mq_maxmsg = maxmsg,
+ .mq_msgsize = msgsize,
+ };
+ attr = &_attr;
+ }
+
+ /* Enforce the right access mode for the mq */
+ old_mask = umask(~ mq_mode);
+
+ /* Include the original umask in our mask */
+ (void) umask(~mq_mode | old_mask);
+ fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
+ (void) umask(old_mask);
+
+ if (fd < 0)
+ return -errno;
+
+ if (fstat(fd, &st) < 0)
+ return -errno;
+
+ if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
+ st.st_uid != getuid() ||
+ st.st_gid != getgid())
+ return -EEXIST;
+
+ r = fd;
+ fd = -1;
+
+ return r;
+}
+
+static int socket_symlink(Socket *s) {
+ const char *p;
+ char **i;
+
+ assert(s);
+
+ p = socket_find_symlink_target(s);
+ if (!p)
+ return 0;
+
+ STRV_FOREACH(i, s->symlinks)
+ symlink_label(p, *i);
+
+ return 0;
+}
+
+static int usbffs_write_descs(int fd, Service *s) {
+ int r;
+
+ if (!s->usb_function_descriptors || !s->usb_function_strings)
+ return -EINVAL;
+
+ r = copy_file_fd(s->usb_function_descriptors, fd, false);
+ if (r < 0)
+ return r;
+
+ return copy_file_fd(s->usb_function_strings, fd, false);
+}
+
+static int usbffs_select_ep(const struct dirent *d) {
+ return d->d_name[0] != '.' && !streq(d->d_name, "ep0");
+}
+
+static int usbffs_dispatch_eps(SocketPort *p) {
+ _cleanup_free_ struct dirent **ent = NULL;
+ _cleanup_free_ char *path = NULL;
+ int r, i, n, k;
+
+ path = dirname_malloc(p->path);
+ if (!path)
+ return -ENOMEM;
+
+ r = scandir(path, &ent, usbffs_select_ep, alphasort);
+ if (r < 0)
+ return -errno;
+
+ n = r;
+ p->auxiliary_fds = new(int, n);
+ if (!p->auxiliary_fds)
+ return -ENOMEM;
+
+ p->n_auxiliary_fds = n;
+
+ k = 0;
+ for (i = 0; i < n; ++i) {
+ _cleanup_free_ char *ep = NULL;
+
+ ep = path_make_absolute(ent[i]->d_name, path);
+ if (!ep)
+ return -ENOMEM;
+
+ path_kill_slashes(ep);
+
+ r = usbffs_address_create(ep);
+ if (r < 0)
+ goto fail;
+
+ p->auxiliary_fds[k] = r;
+
+ ++k;
+ free(ent[i]);
+ }
+
+ return r;
+
+fail:
+ close_many(p->auxiliary_fds, k);
+ p->auxiliary_fds = mfree(p->auxiliary_fds);
+ p->n_auxiliary_fds = 0;
+
+ return r;
+}
+
+static int socket_open_fds(Socket *s) {
+ _cleanup_(mac_selinux_freep) char *label = NULL;
+ bool know_label = false;
+ SocketPort *p;
+ int r;
+
+ assert(s);
+
+ LIST_FOREACH(port, p, s->ports) {
+
+ if (p->fd >= 0)
+ continue;
+
+ switch (p->type) {
+
+ case SOCKET_SOCKET:
+
+ if (!know_label) {
+ /* Figure out label, if we don't it know
+ * yet. We do it once, for the first
+ * socket where we need this and
+ * remember it for the rest. */
+
+ if (s->selinux_context_from_net) {
+ /* Get it from the network label */
+
+ r = mac_selinux_get_our_label(&label);
+ if (r < 0 && r != -EOPNOTSUPP)
+ goto rollback;
+
+ } else {
+ /* Get it from the executable we are about to start */
+
+ r = socket_instantiate_service(s);
+ if (r < 0)
+ goto rollback;
+
+ if (UNIT_ISSET(s->service) &&
+ SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
+ r = mac_selinux_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
+ if (r < 0 && r != -EPERM && r != -EOPNOTSUPP)
+ goto rollback;
+ }
+ }
+
+ know_label = true;
+ }
+
+ /* Apply the socket protocol */
+ switch(p->address.type) {
+ case SOCK_STREAM:
+ case SOCK_SEQPACKET:
+ if (p->socket->socket_protocol == IPPROTO_SCTP)
+ p->address.protocol = p->socket->socket_protocol;
+ break;
+ case SOCK_DGRAM:
+ if (p->socket->socket_protocol == IPPROTO_UDPLITE)
+ p->address.protocol = p->socket->socket_protocol;
+ break;
+ }
+
+ r = socket_address_listen(
+ &p->address,
+ SOCK_CLOEXEC|SOCK_NONBLOCK,
+ s->backlog,
+ s->bind_ipv6_only,
+ s->bind_to_device,
+ s->reuse_port,
+ s->free_bind,
+ s->transparent,
+ s->directory_mode,
+ s->socket_mode,
+ label);
+ if (r < 0)
+ goto rollback;
+
+ p->fd = r;
+ socket_apply_socket_options(s, p->fd);
+ socket_symlink(s);
+ break;
+
+ case SOCKET_SPECIAL:
+
+ p->fd = special_address_create(p->path, s->writable);
+ if (p->fd < 0) {
+ r = p->fd;
+ goto rollback;
+ }
+ break;
+
+ case SOCKET_FIFO:
+
+ p->fd = fifo_address_create(
+ p->path,
+ s->directory_mode,
+ s->socket_mode);
+ if (p->fd < 0) {
+ r = p->fd;
+ goto rollback;
+ }
+
+ socket_apply_fifo_options(s, p->fd);
+ socket_symlink(s);
+ break;
+
+ case SOCKET_MQUEUE:
+
+ p->fd = mq_address_create(
+ p->path,
+ s->socket_mode,
+ s->mq_maxmsg,
+ s->mq_msgsize);
+ if (p->fd < 0) {
+ r = p->fd;
+ goto rollback;
+ }
+ break;
+
+ case SOCKET_USB_FUNCTION:
+
+ p->fd = usbffs_address_create(p->path);
+ if (p->fd < 0) {
+ r = p->fd;
+ goto rollback;
+ }
+
+ r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service)));
+ if (r < 0)
+ goto rollback;
+
+ r = usbffs_dispatch_eps(p);
+ if (r < 0)
+ goto rollback;
+
+ break;
+
+ default:
+ assert_not_reached("Unknown port type");
+ }
+ }
+
+ return 0;
+
+rollback:
+ socket_close_fds(s);
+ return r;
+}
+
+static void socket_unwatch_fds(Socket *s) {
+ SocketPort *p;
+ int r;
+
+ assert(s);
+
+ LIST_FOREACH(port, p, s->ports) {
+ if (p->fd < 0)
+ continue;
+
+ if (!p->event_source)
+ continue;
+
+ r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF);
+ if (r < 0)
+ log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m");
+ }
+}
+
+static int socket_watch_fds(Socket *s) {
+ SocketPort *p;
+ int r;
+
+ assert(s);
+
+ LIST_FOREACH(port, p, s->ports) {
+ if (p->fd < 0)
+ continue;
+
+ if (p->event_source) {
+ r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON);
+ if (r < 0)
+ goto fail;
+ } else {
+ r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p);
+ if (r < 0)
+ goto fail;
+
+ (void) sd_event_source_set_description(p->event_source, "socket-port-io");
+ }
+ }
+
+ return 0;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m");
+ socket_unwatch_fds(s);
+ return r;
+}
+
+static void socket_set_state(Socket *s, SocketState state) {
+ SocketState old_state;
+ assert(s);
+
+ old_state = s->state;
+ s->state = state;
+
+ if (!IN_SET(state,
+ SOCKET_START_PRE,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_PRE_SIGKILL,
+ SOCKET_STOP_POST,
+ SOCKET_FINAL_SIGTERM,
+ SOCKET_FINAL_SIGKILL)) {
+
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
+ socket_unwatch_control_pid(s);
+ s->control_command = NULL;
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+ }
+
+ if (state != SOCKET_LISTENING)
+ socket_unwatch_fds(s);
+
+ if (!IN_SET(state,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST,
+ SOCKET_LISTENING,
+ SOCKET_RUNNING,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_PRE_SIGKILL))
+ socket_close_fds(s);
+
+ if (state != old_state)
+ log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state));
+
+ unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
+}
+
+static int socket_coldplug(Unit *u) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(s);
+ assert(s->state == SOCKET_DEAD);
+
+ if (s->deserialized_state == s->state)
+ return 0;
+
+ if (s->control_pid > 0 &&
+ pid_is_unwaited(s->control_pid) &&
+ IN_SET(s->deserialized_state,
+ SOCKET_START_PRE,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_PRE_SIGKILL,
+ SOCKET_STOP_POST,
+ SOCKET_FINAL_SIGTERM,
+ SOCKET_FINAL_SIGKILL)) {
+
+ r = unit_watch_pid(UNIT(s), s->control_pid);
+ if (r < 0)
+ return r;
+
+ r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec));
+ if (r < 0)
+ return r;
+ }
+
+ if (IN_SET(s->deserialized_state,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST,
+ SOCKET_LISTENING,
+ SOCKET_RUNNING,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_PRE_SIGKILL)) {
+
+ r = socket_open_fds(s);
+ if (r < 0)
+ return r;
+ }
+
+ if (s->deserialized_state == SOCKET_LISTENING) {
+ r = socket_watch_fds(s);
+ if (r < 0)
+ return r;
+ }
+
+ socket_set_state(s, s->deserialized_state);
+ return 0;
+}
+
+static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
+ _cleanup_free_ char **argv = NULL;
+ pid_t pid;
+ int r;
+ ExecParameters exec_params = {
+ .apply_permissions = true,
+ .apply_chroot = true,
+ .apply_tty_stdin = true,
+ .bus_endpoint_fd = -1,
+ .stdin_fd = -1,
+ .stdout_fd = -1,
+ .stderr_fd = -1,
+ };
+
+ assert(s);
+ assert(c);
+ assert(_pid);
+
+ (void) unit_realize_cgroup(UNIT(s));
+ if (s->reset_cpu_usage) {
+ (void) unit_reset_cpu_usage(UNIT(s));
+ s->reset_cpu_usage = false;
+ }
+
+ r = unit_setup_exec_runtime(UNIT(s));
+ if (r < 0)
+ return r;
+
+ r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
+ if (r < 0)
+ return r;
+
+ r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
+ if (r < 0)
+ return r;
+
+ exec_params.argv = argv;
+ exec_params.environment = UNIT(s)->manager->environment;
+ exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
+ exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
+ exec_params.cgroup_path = UNIT(s)->cgroup_path;
+ exec_params.cgroup_delegate = s->cgroup_context.delegate;
+ exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
+
+ r = exec_spawn(UNIT(s),
+ c,
+ &s->exec_context,
+ &exec_params,
+ s->exec_runtime,
+ &pid);
+ if (r < 0)
+ return r;
+
+ r = unit_watch_pid(UNIT(s), pid);
+ if (r < 0)
+ /* FIXME: we need to do something here */
+ return r;
+
+ *_pid = pid;
+ return 0;
+}
+
+static int socket_chown(Socket *s, pid_t *_pid) {
+ pid_t pid;
+ int r;
+
+ r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
+ if (r < 0)
+ goto fail;
+
+ /* We have to resolve the user names out-of-process, hence
+ * let's fork here. It's messy, but well, what can we do? */
+
+ pid = fork();
+ if (pid < 0)
+ return -errno;
+
+ if (pid == 0) {
+ SocketPort *p;
+ uid_t uid = UID_INVALID;
+ gid_t gid = GID_INVALID;
+ int ret;
+
+ (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1);
+ (void) ignore_signals(SIGPIPE, -1);
+ log_forget_fds();
+
+ if (!isempty(s->user)) {
+ const char *user = s->user;
+
+ r = get_user_creds(&user, &uid, &gid, NULL, NULL);
+ if (r < 0) {
+ ret = EXIT_USER;
+ goto fail_child;
+ }
+ }
+
+ if (!isempty(s->group)) {
+ const char *group = s->group;
+
+ r = get_group_creds(&group, &gid);
+ if (r < 0) {
+ ret = EXIT_GROUP;
+ goto fail_child;
+ }
+ }
+
+ LIST_FOREACH(port, p, s->ports) {
+ const char *path = NULL;
+
+ if (p->type == SOCKET_SOCKET)
+ path = socket_address_get_path(&p->address);
+ else if (p->type == SOCKET_FIFO)
+ path = p->path;
+
+ if (!path)
+ continue;
+
+ if (chown(path, uid, gid) < 0) {
+ r = -errno;
+ ret = EXIT_CHOWN;
+ goto fail_child;
+ }
+ }
+
+ _exit(0);
+
+ fail_child:
+ log_open();
+ log_error_errno(r, "Failed to chown socket at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD));
+
+ _exit(ret);
+ }
+
+ r = unit_watch_pid(UNIT(s), pid);
+ if (r < 0)
+ goto fail;
+
+ *_pid = pid;
+ return 0;
+
+fail:
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
+ return r;
+}
+
+static void socket_enter_dead(Socket *s, SocketResult f) {
+ assert(s);
+
+ if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ exec_runtime_destroy(s->exec_runtime);
+ s->exec_runtime = exec_runtime_unref(s->exec_runtime);
+
+ exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
+
+ socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
+}
+
+static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
+
+static void socket_enter_stop_post(Socket *s, SocketResult f) {
+ int r;
+ assert(s);
+
+ if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ socket_unwatch_control_pid(s);
+ s->control_command_id = SOCKET_EXEC_STOP_POST;
+ s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST];
+
+ if (s->control_command) {
+ r = socket_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_POST);
+ } else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
+ int r;
+
+ assert(s);
+
+ if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ r = unit_kill_context(
+ UNIT(s),
+ &s->kill_context,
+ (state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_FINAL_SIGTERM) ?
+ KILL_KILL : KILL_TERMINATE,
+ -1,
+ s->control_pid,
+ false);
+ if (r < 0)
+ goto fail;
+
+ if (r > 0) {
+ r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
+ if (r < 0)
+ goto fail;
+
+ socket_set_state(s, state);
+ } else if (state == SOCKET_STOP_PRE_SIGTERM)
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS);
+ else if (state == SOCKET_STOP_PRE_SIGKILL)
+ socket_enter_stop_post(s, SOCKET_SUCCESS);
+ else if (state == SOCKET_FINAL_SIGTERM)
+ socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS);
+ else
+ socket_enter_dead(s, SOCKET_SUCCESS);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
+
+ if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
+ socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
+ else
+ socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_stop_pre(Socket *s, SocketResult f) {
+ int r;
+ assert(s);
+
+ if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ socket_unwatch_control_pid(s);
+ s->control_command_id = SOCKET_EXEC_STOP_PRE;
+ s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE];
+
+ if (s->control_command) {
+ r = socket_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_PRE);
+ } else
+ socket_enter_stop_post(s, SOCKET_SUCCESS);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m");
+ socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_listening(Socket *s) {
+ int r;
+ assert(s);
+
+ r = socket_watch_fds(s);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m");
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_LISTENING);
+ return;
+
+fail:
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_start_post(Socket *s) {
+ int r;
+ assert(s);
+
+ socket_unwatch_control_pid(s);
+ s->control_command_id = SOCKET_EXEC_START_POST;
+ s->control_command = s->exec_command[SOCKET_EXEC_START_POST];
+
+ if (s->control_command) {
+ r = socket_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_START_POST);
+ } else
+ socket_enter_listening(s);
+
+ return;
+
+fail:
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_start_chown(Socket *s) {
+ int r;
+
+ assert(s);
+
+ r = socket_open_fds(s);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m");
+ goto fail;
+ }
+
+ if (!isempty(s->user) || !isempty(s->group)) {
+
+ socket_unwatch_control_pid(s);
+ s->control_command_id = SOCKET_EXEC_START_CHOWN;
+ s->control_command = NULL;
+
+ r = socket_chown(s, &s->control_pid);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m");
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_START_CHOWN);
+ } else
+ socket_enter_start_post(s);
+
+ return;
+
+fail:
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_start_pre(Socket *s) {
+ int r;
+ assert(s);
+
+ socket_unwatch_control_pid(s);
+ s->control_command_id = SOCKET_EXEC_START_PRE;
+ s->control_command = s->exec_command[SOCKET_EXEC_START_PRE];
+
+ if (s->control_command) {
+ r = socket_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_START_PRE);
+ } else
+ socket_enter_start_chown(s);
+
+ return;
+
+fail:
+ socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
+}
+
+static void socket_enter_running(Socket *s, int cfd) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(s);
+
+ /* We don't take connections anymore if we are supposed to
+ * shut down anyway */
+ if (unit_stop_pending(UNIT(s))) {
+
+ log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled.");
+
+ if (cfd >= 0)
+ safe_close(cfd);
+ else {
+ /* Flush all sockets by closing and reopening them */
+ socket_close_fds(s);
+
+ r = socket_open_fds(s);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m");
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+ return;
+ }
+
+ r = socket_watch_fds(s);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m");
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+ }
+ }
+
+ return;
+ }
+
+ if (cfd < 0) {
+ Iterator i;
+ Unit *other;
+ bool pending = false;
+
+ /* If there's already a start pending don't bother to
+ * do anything */
+ SET_FOREACH(other, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
+ if (unit_active_or_pending(other)) {
+ pending = true;
+ break;
+ }
+
+ if (!pending) {
+ if (!UNIT_ISSET(s->service)) {
+ log_unit_error(UNIT(s), "Service to activate vanished, refusing activation.");
+ r = -ENOENT;
+ goto fail;
+ }
+
+ r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, &error, NULL);
+ if (r < 0)
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_RUNNING);
+ } else {
+ _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL;
+ Service *service;
+
+ if (s->n_connections >= s->max_connections) {
+ log_unit_warning(UNIT(s), "Too many incoming connections (%u)", s->n_connections);
+ safe_close(cfd);
+ return;
+ }
+
+ r = socket_instantiate_service(s);
+ if (r < 0)
+ goto fail;
+
+ r = instance_from_socket(cfd, s->n_accepted, &instance);
+ if (r < 0) {
+ if (r != -ENOTCONN)
+ goto fail;
+
+ /* ENOTCONN is legitimate if TCP RST was received.
+ * This connection is over, but the socket unit lives on. */
+ safe_close(cfd);
+ return;
+ }
+
+ r = unit_name_to_prefix(UNIT(s)->id, &prefix);
+ if (r < 0)
+ goto fail;
+
+ r = unit_name_build(prefix, instance, ".service", &name);
+ if (r < 0)
+ goto fail;
+
+ r = unit_add_name(UNIT_DEREF(s->service), name);
+ if (r < 0)
+ goto fail;
+
+ service = SERVICE(UNIT_DEREF(s->service));
+ unit_ref_unset(&s->service);
+ s->n_accepted ++;
+
+ UNIT(service)->no_gc = false;
+
+ unit_choose_id(UNIT(service), name);
+
+ r = service_set_socket_fd(service, cfd, s, s->selinux_context_from_net);
+ if (r < 0)
+ goto fail;
+
+ cfd = -1;
+ s->n_connections ++;
+
+ r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, &error, NULL);
+ if (r < 0)
+ goto fail;
+
+ /* Notify clients about changed counters */
+ unit_add_to_dbus_queue(UNIT(s));
+ }
+
+ return;
+
+fail:
+ log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s",
+ cfd >= 0 ? "template" : "non-template",
+ bus_error_message(&error, r));
+
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+ safe_close(cfd);
+}
+
+static void socket_run_next(Socket *s) {
+ int r;
+
+ assert(s);
+ assert(s->control_command);
+ assert(s->control_command->command_next);
+
+ socket_unwatch_control_pid(s);
+
+ s->control_command = s->control_command->command_next;
+
+ r = socket_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m");
+
+ if (s->state == SOCKET_START_POST)
+ socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
+ else if (s->state == SOCKET_STOP_POST)
+ socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
+ else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
+}
+
+static int socket_start(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ /* We cannot fulfill this request right now, try again later
+ * please! */
+ if (IN_SET(s->state,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGKILL,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_POST,
+ SOCKET_FINAL_SIGTERM,
+ SOCKET_FINAL_SIGKILL))
+ return -EAGAIN;
+
+ /* Already on it! */
+ if (IN_SET(s->state,
+ SOCKET_START_PRE,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST))
+ return 0;
+
+ /* Cannot run this without the service being around */
+ if (UNIT_ISSET(s->service)) {
+ Service *service;
+
+ service = SERVICE(UNIT_DEREF(s->service));
+
+ if (UNIT(service)->load_state != UNIT_LOADED) {
+ log_unit_error(u, "Socket service %s not loaded, refusing.", UNIT(service)->id);
+ return -ENOENT;
+ }
+
+ /* If the service is already active we cannot start the
+ * socket */
+ if (service->state != SERVICE_DEAD &&
+ service->state != SERVICE_FAILED &&
+ service->state != SERVICE_AUTO_RESTART) {
+ log_unit_error(u, "Socket service %s already active, refusing.", UNIT(service)->id);
+ return -EBUSY;
+ }
+ }
+
+ assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
+
+ s->result = SOCKET_SUCCESS;
+ s->reset_cpu_usage = true;
+
+ socket_enter_start_pre(s);
+
+ return 1;
+}
+
+static int socket_stop(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ /* Already on it */
+ if (IN_SET(s->state,
+ SOCKET_STOP_PRE,
+ SOCKET_STOP_PRE_SIGTERM,
+ SOCKET_STOP_PRE_SIGKILL,
+ SOCKET_STOP_POST,
+ SOCKET_FINAL_SIGTERM,
+ SOCKET_FINAL_SIGKILL))
+ return 0;
+
+ /* If there's already something running we go directly into
+ * kill mode. */
+ if (IN_SET(s->state,
+ SOCKET_START_PRE,
+ SOCKET_START_CHOWN,
+ SOCKET_START_POST)) {
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
+ return -EAGAIN;
+ }
+
+ assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
+
+ socket_enter_stop_pre(s, SOCKET_SUCCESS);
+ return 1;
+}
+
+static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ SocketPort *p;
+ int r;
+
+ assert(u);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
+ unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
+ unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
+
+ if (s->control_pid > 0)
+ unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
+
+ if (s->control_command_id >= 0)
+ unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
+
+ LIST_FOREACH(port, p, s->ports) {
+ int copy;
+
+ if (p->fd < 0)
+ continue;
+
+ copy = fdset_put_dup(fds, p->fd);
+ if (copy < 0)
+ return copy;
+
+ if (p->type == SOCKET_SOCKET) {
+ _cleanup_free_ char *t = NULL;
+
+ r = socket_address_print(&p->address, &t);
+ if (r < 0)
+ return r;
+
+ if (socket_address_family(&p->address) == AF_NETLINK)
+ unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
+ else
+ unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
+
+ } else if (p->type == SOCKET_SPECIAL)
+ unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
+ else if (p->type == SOCKET_MQUEUE)
+ unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path);
+ else if (p->type == SOCKET_USB_FUNCTION)
+ unit_serialize_item_format(u, f, "ffs", "%i %s", copy, p->path);
+ else {
+ assert(p->type == SOCKET_FIFO);
+ unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
+ }
+ }
+
+ return 0;
+}
+
+static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Socket *s = SOCKET(u);
+
+ assert(u);
+ assert(key);
+ assert(value);
+
+ if (streq(key, "state")) {
+ SocketState state;
+
+ state = socket_state_from_string(value);
+ if (state < 0)
+ log_unit_debug(u, "Failed to parse state value: %s", value);
+ else
+ s->deserialized_state = state;
+ } else if (streq(key, "result")) {
+ SocketResult f;
+
+ f = socket_result_from_string(value);
+ if (f < 0)
+ log_unit_debug(u, "Failed to parse result value: %s", value);
+ else if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ } else if (streq(key, "n-accepted")) {
+ unsigned k;
+
+ if (safe_atou(value, &k) < 0)
+ log_unit_debug(u, "Failed to parse n-accepted value: %s", value);
+ else
+ s->n_accepted += k;
+ } else if (streq(key, "control-pid")) {
+ pid_t pid;
+
+ if (parse_pid(value, &pid) < 0)
+ log_unit_debug(u, "Failed to parse control-pid value: %s", value);
+ else
+ s->control_pid = pid;
+ } else if (streq(key, "control-command")) {
+ SocketExecCommand id;
+
+ id = socket_exec_command_from_string(value);
+ if (id < 0)
+ log_unit_debug(u, "Failed to parse exec-command value: %s", value);
+ else {
+ s->control_command_id = id;
+ s->control_command = s->exec_command[id];
+ }
+ } else if (streq(key, "fifo")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse fifo value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (p->type == SOCKET_FIFO &&
+ path_equal_or_files_same(p->path, value+skip))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "special")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse special value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (p->type == SOCKET_SPECIAL &&
+ path_equal_or_files_same(p->path, value+skip))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "mqueue")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse mqueue value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (p->type == SOCKET_MQUEUE &&
+ streq(p->path, value+skip))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "socket")) {
+ int fd, type, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse socket value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (socket_address_is(&p->address, value+skip, type))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "netlink")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse socket value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (socket_address_is_netlink(&p->address, value+skip))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "ffs")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse ffs value: %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (p->type == SOCKET_USB_FUNCTION &&
+ path_equal_or_files_same(p->path, value+skip))
+ break;
+
+ if (p) {
+ safe_close(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else
+ log_unit_debug(UNIT(s), "Unknown serialization key: %s", key);
+
+ return 0;
+}
+
+static void socket_distribute_fds(Unit *u, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ SocketPort *p;
+
+ assert(u);
+
+ LIST_FOREACH(port, p, s->ports) {
+ Iterator i;
+ int fd;
+
+ if (p->type != SOCKET_SOCKET)
+ continue;
+
+ if (p->fd >= 0)
+ continue;
+
+ FDSET_FOREACH(fd, fds, i) {
+ if (socket_address_matches_fd(&p->address, fd)) {
+ p->fd = fdset_remove(fds, fd);
+ s->deserialized_state = SOCKET_LISTENING;
+ break;
+ }
+ }
+ }
+}
+
+_pure_ static UnitActiveState socket_active_state(Unit *u) {
+ assert(u);
+
+ return state_translation_table[SOCKET(u)->state];
+}
+
+_pure_ static const char *socket_sub_state_to_string(Unit *u) {
+ assert(u);
+
+ return socket_state_to_string(SOCKET(u)->state);
+}
+
+const char* socket_port_type_to_string(SocketPort *p) {
+
+ assert(p);
+
+ switch (p->type) {
+
+ case SOCKET_SOCKET:
+
+ switch (p->address.type) {
+
+ case SOCK_STREAM:
+ return "Stream";
+
+ case SOCK_DGRAM:
+ return "Datagram";
+
+ case SOCK_SEQPACKET:
+ return "SequentialPacket";
+
+ case SOCK_RAW:
+ if (socket_address_family(&p->address) == AF_NETLINK)
+ return "Netlink";
+
+ default:
+ return NULL;
+ }
+
+ case SOCKET_SPECIAL:
+ return "Special";
+
+ case SOCKET_MQUEUE:
+ return "MessageQueue";
+
+ case SOCKET_FIFO:
+ return "FIFO";
+
+ case SOCKET_USB_FUNCTION:
+ return "USBFunction";
+
+ default:
+ return NULL;
+ }
+}
+
+_pure_ static bool socket_check_gc(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(u);
+
+ return s->n_connections > 0;
+}
+
+static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
+ SocketPort *p = userdata;
+ int cfd = -1;
+
+ assert(p);
+ assert(fd >= 0);
+
+ if (p->socket->state != SOCKET_LISTENING)
+ return 0;
+
+ log_unit_debug(UNIT(p->socket), "Incoming traffic");
+
+ if (revents != EPOLLIN) {
+
+ if (revents & EPOLLHUP)
+ 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.");
+ else
+ log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents);
+ goto fail;
+ }
+
+ if (p->socket->accept &&
+ p->type == SOCKET_SOCKET &&
+ socket_address_can_accept(&p->address)) {
+
+ for (;;) {
+
+ cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK);
+ if (cfd < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ log_unit_error_errno(UNIT(p->socket), errno, "Failed to accept socket: %m");
+ goto fail;
+ }
+
+ break;
+ }
+
+ socket_apply_socket_options(p->socket, cfd);
+ }
+
+ socket_enter_running(p->socket, cfd);
+ return 0;
+
+fail:
+ socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES);
+ return 0;
+}
+
+static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
+ Socket *s = SOCKET(u);
+ SocketResult f;
+
+ assert(s);
+ assert(pid >= 0);
+
+ if (pid != s->control_pid)
+ return;
+
+ s->control_pid = 0;
+
+ if (is_clean_exit(code, status, NULL))
+ f = SOCKET_SUCCESS;
+ else if (code == CLD_EXITED)
+ f = SOCKET_FAILURE_EXIT_CODE;
+ else if (code == CLD_KILLED)
+ f = SOCKET_FAILURE_SIGNAL;
+ else if (code == CLD_DUMPED)
+ f = SOCKET_FAILURE_CORE_DUMP;
+ else
+ assert_not_reached("Unknown sigchld code");
+
+ if (s->control_command) {
+ exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
+
+ if (s->control_command->ignore)
+ f = SOCKET_SUCCESS;
+ }
+
+ log_unit_full(u, f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
+ "Control process exited, code=%s status=%i",
+ sigchld_code_to_string(code), status);
+
+ if (f != SOCKET_SUCCESS)
+ s->result = f;
+
+ if (s->control_command &&
+ s->control_command->command_next &&
+ f == SOCKET_SUCCESS) {
+
+ log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state));
+ socket_run_next(s);
+ } else {
+ s->control_command = NULL;
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+
+ /* No further commands for this step, so let's figure
+ * out what to do next */
+
+ log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state));
+
+ switch (s->state) {
+
+ case SOCKET_START_PRE:
+ if (f == SOCKET_SUCCESS)
+ socket_enter_start_chown(s);
+ else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
+ break;
+
+ case SOCKET_START_CHOWN:
+ if (f == SOCKET_SUCCESS)
+ socket_enter_start_post(s);
+ else
+ socket_enter_stop_pre(s, f);
+ break;
+
+ case SOCKET_START_POST:
+ if (f == SOCKET_SUCCESS)
+ socket_enter_listening(s);
+ else
+ socket_enter_stop_pre(s, f);
+ break;
+
+ case SOCKET_STOP_PRE:
+ case SOCKET_STOP_PRE_SIGTERM:
+ case SOCKET_STOP_PRE_SIGKILL:
+ socket_enter_stop_post(s, f);
+ break;
+
+ case SOCKET_STOP_POST:
+ case SOCKET_FINAL_SIGTERM:
+ case SOCKET_FINAL_SIGKILL:
+ socket_enter_dead(s, f);
+ break;
+
+ default:
+ assert_not_reached("Uh, control process died at wrong time.");
+ }
+ }
+
+ /* Notify clients about changed exit status */
+ unit_add_to_dbus_queue(u);
+}
+
+static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
+ Socket *s = SOCKET(userdata);
+
+ assert(s);
+ assert(s->timer_event_source == source);
+
+ switch (s->state) {
+
+ case SOCKET_START_PRE:
+ log_unit_warning(UNIT(s), "Starting timed out. Terminating.");
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ case SOCKET_START_CHOWN:
+ case SOCKET_START_POST:
+ log_unit_warning(UNIT(s), "Starting timed out. Stopping.");
+ socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ case SOCKET_STOP_PRE:
+ log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ case SOCKET_STOP_PRE_SIGTERM:
+ if (s->kill_context.send_sigkill) {
+ log_unit_warning(UNIT(s), "Stopping timed out. Killing.");
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
+ } else {
+ log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring.");
+ socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
+ }
+ break;
+
+ case SOCKET_STOP_PRE_SIGKILL:
+ log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
+ socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ case SOCKET_STOP_POST:
+ log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating.");
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ case SOCKET_FINAL_SIGTERM:
+ if (s->kill_context.send_sigkill) {
+ log_unit_warning(UNIT(s), "Stopping timed out (2). Killing.");
+ socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
+ } else {
+ log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring.");
+ socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
+ }
+ break;
+
+ case SOCKET_FINAL_SIGKILL:
+ log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode.");
+ socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
+ break;
+
+ default:
+ assert_not_reached("Timeout at wrong time.");
+ }
+
+ return 0;
+}
+
+int socket_collect_fds(Socket *s, int **fds) {
+ int *rfds, k = 0, n = 0;
+ SocketPort *p;
+
+ assert(s);
+ assert(fds);
+
+ /* Called from the service code for requesting our fds */
+
+ LIST_FOREACH(port, p, s->ports) {
+ if (p->fd >= 0)
+ n++;
+ n += p->n_auxiliary_fds;
+ }
+
+ if (n <= 0) {
+ *fds = NULL;
+ return 0;
+ }
+
+ rfds = new(int, n);
+ if (!rfds)
+ return -ENOMEM;
+
+ LIST_FOREACH(port, p, s->ports) {
+ int i;
+
+ if (p->fd >= 0)
+ rfds[k++] = p->fd;
+ for (i = 0; i < p->n_auxiliary_fds; ++i)
+ rfds[k++] = p->auxiliary_fds[i];
+ }
+
+ assert(k == n);
+
+ *fds = rfds;
+ return n;
+}
+
+static void socket_reset_failed(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ if (s->state == SOCKET_FAILED)
+ socket_set_state(s, SOCKET_DEAD);
+
+ s->result = SOCKET_SUCCESS;
+}
+
+void socket_connection_unref(Socket *s) {
+ assert(s);
+
+ /* The service is dead. Yay!
+ *
+ * This is strictly for one-instance-per-connection
+ * services. */
+
+ assert(s->n_connections > 0);
+ s->n_connections--;
+
+ log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections);
+}
+
+static void socket_trigger_notify(Unit *u, Unit *other) {
+ Socket *s = SOCKET(u);
+
+ assert(u);
+ assert(other);
+
+ /* Don't propagate state changes from the service if we are
+ already down or accepting connections */
+ if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING) || s->accept)
+ return;
+
+ if (other->start_limit_hit) {
+ socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT);
+ return;
+ }
+
+ if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE)
+ return;
+
+ if (IN_SET(SERVICE(other)->state,
+ SERVICE_DEAD, SERVICE_FAILED,
+ SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
+ SERVICE_AUTO_RESTART))
+ socket_enter_listening(s);
+
+ if (SERVICE(other)->state == SERVICE_RUNNING)
+ socket_set_state(s, SOCKET_RUNNING);
+}
+
+static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
+ return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error);
+}
+
+static int socket_get_timeout(Unit *u, usec_t *timeout) {
+ Socket *s = SOCKET(u);
+ usec_t t;
+ int r;
+
+ if (!s->timer_event_source)
+ return 0;
+
+ r = sd_event_source_get_time(s->timer_event_source, &t);
+ if (r < 0)
+ return r;
+ if (t == USEC_INFINITY)
+ return 0;
+
+ *timeout = t;
+ return 1;
+}
+
+char *socket_fdname(Socket *s) {
+ assert(s);
+
+ /* Returns the name to use for $LISTEN_NAMES. If the user
+ * didn't specify anything specifically, use the socket unit's
+ * name as fallback. */
+
+ if (s->fdname)
+ return s->fdname;
+
+ return UNIT(s)->id;
+}
+
+static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
+ [SOCKET_EXEC_START_PRE] = "StartPre",
+ [SOCKET_EXEC_START_CHOWN] = "StartChown",
+ [SOCKET_EXEC_START_POST] = "StartPost",
+ [SOCKET_EXEC_STOP_PRE] = "StopPre",
+ [SOCKET_EXEC_STOP_POST] = "StopPost"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
+
+static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
+ [SOCKET_SUCCESS] = "success",
+ [SOCKET_FAILURE_RESOURCES] = "resources",
+ [SOCKET_FAILURE_TIMEOUT] = "timeout",
+ [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
+ [SOCKET_FAILURE_SIGNAL] = "signal",
+ [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
+ [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
+
+const UnitVTable socket_vtable = {
+ .object_size = sizeof(Socket),
+ .exec_context_offset = offsetof(Socket, exec_context),
+ .cgroup_context_offset = offsetof(Socket, cgroup_context),
+ .kill_context_offset = offsetof(Socket, kill_context),
+ .exec_runtime_offset = offsetof(Socket, exec_runtime),
+
+ .sections =
+ "Unit\0"
+ "Socket\0"
+ "Install\0",
+ .private_section = "Socket",
+
+ .init = socket_init,
+ .done = socket_done,
+ .load = socket_load,
+
+ .coldplug = socket_coldplug,
+
+ .dump = socket_dump,
+
+ .start = socket_start,
+ .stop = socket_stop,
+
+ .kill = socket_kill,
+
+ .get_timeout = socket_get_timeout,
+
+ .serialize = socket_serialize,
+ .deserialize_item = socket_deserialize_item,
+ .distribute_fds = socket_distribute_fds,
+
+ .active_state = socket_active_state,
+ .sub_state_to_string = socket_sub_state_to_string,
+
+ .check_gc = socket_check_gc,
+
+ .sigchld_event = socket_sigchld_event,
+
+ .trigger_notify = socket_trigger_notify,
+
+ .reset_failed = socket_reset_failed,
+
+ .bus_vtable = bus_socket_vtable,
+ .bus_set_property = bus_socket_set_property,
+ .bus_commit_properties = bus_socket_commit_properties,
+
+ .status_message_formats = {
+ /*.starting_stopping = {
+ [0] = "Starting socket %s...",
+ [1] = "Stopping socket %s...",
+ },*/
+ .finished_start_job = {
+ [JOB_DONE] = "Listening on %s.",
+ [JOB_FAILED] = "Failed to listen on %s.",
+ [JOB_TIMEOUT] = "Timed out starting %s.",
+ },
+ .finished_stop_job = {
+ [JOB_DONE] = "Closed %s.",
+ [JOB_FAILED] = "Failed stopping %s.",
+ [JOB_TIMEOUT] = "Timed out stopping %s.",
+ },
+ },
+};