src/core/dbus-socket.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "alloc-util.h"
   4 #include "bus-get-properties.h"
   5 #include "dbus-cgroup.h"
   6 #include "dbus-execute.h"
   7 #include "dbus-kill.h"
   8 #include "dbus-socket.h"
   9 #include "dbus-util.h"
  10 #include "fd-util.h"
  11 #include "ip-protocol-list.h"
  12 #include "parse-util.h"
  13 #include "path-util.h"
  14 #include "socket.h"
  15 #include "socket-netlink.h"
  16 #include "socket-util.h"
  17 #include "string-util.h"
  18 #include "unit.h"
  19
  20 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, socket_result, SocketResult);
  21 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_bind_ipv6_only, socket_address_bind_ipv6_only, SocketAddressBindIPv6Only);
  22 static BUS_DEFINE_PROPERTY_GET(property_get_fdname, "s", Socket, socket_fdname);
  23 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_timestamping, socket_timestamping, SocketTimestamping);
  24
  25 static int property_get_listen(
  26                 sd_bus *bus,
  27                 const char *path,
  28                 const char *interface,
  29                 const char *property,
  30                 sd_bus_message *reply,
  31                 void *userdata,
  32                 sd_bus_error *error) {
  33
  34         Socket *s = SOCKET(userdata);
  35         int r;
  36
  37         assert(bus);
  38         assert(reply);
  39         assert(s);
  40
  41         r = sd_bus_message_open_container(reply, 'a', "(ss)");
  42         if (r < 0)
  43                 return r;
  44
  45         LIST_FOREACH(port, p, s->ports) {
  46                 _cleanup_free_ char *address = NULL;
  47                 const char *a;
  48
  49                 switch (p->type) {
  50                         case SOCKET_SOCKET: {
  51                                 r = socket_address_print(&p->address, &address);
  52                                 if (r)
  53                                         return r;
  54
  55                                 a = address;
  56                                 break;
  57                         }
  58
  59                         case SOCKET_SPECIAL:
  60                         case SOCKET_MQUEUE:
  61                         case SOCKET_FIFO:
  62                         case SOCKET_USB_FUNCTION:
  63                                 a = p->path;
  64                                 break;
  65
  66                         default:
  67                                 assert_not_reached();
  68                 }
  69
  70                 r = sd_bus_message_append(reply, "(ss)", socket_port_type_to_string(p), a);
  71                 if (r < 0)
  72                         return r;
  73         }
  74
  75         return sd_bus_message_close_container(reply);
  76 }
  77
  78 const sd_bus_vtable bus_socket_vtable[] = {
  79         SD_BUS_VTABLE_START(0),
  80         SD_BUS_PROPERTY("BindIPv6Only", "s", property_get_bind_ipv6_only, offsetof(Socket, bind_ipv6_only), SD_BUS_VTABLE_PROPERTY_CONST),
  81         SD_BUS_PROPERTY("Backlog", "u", bus_property_get_unsigned, offsetof(Socket, backlog), SD_BUS_VTABLE_PROPERTY_CONST),
  82         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Socket, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
  83         SD_BUS_PROPERTY("BindToDevice", "s", NULL, offsetof(Socket, bind_to_device), SD_BUS_VTABLE_PROPERTY_CONST),
  84         SD_BUS_PROPERTY("SocketUser", "s", NULL, offsetof(Socket, user), SD_BUS_VTABLE_PROPERTY_CONST),
  85         SD_BUS_PROPERTY("SocketGroup", "s", NULL, offsetof(Socket, group), SD_BUS_VTABLE_PROPERTY_CONST),
  86         SD_BUS_PROPERTY("SocketMode", "u", bus_property_get_mode, offsetof(Socket, socket_mode), SD_BUS_VTABLE_PROPERTY_CONST),
  87         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Socket, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
  88         SD_BUS_PROPERTY("Accept", "b", bus_property_get_bool, offsetof(Socket, accept), SD_BUS_VTABLE_PROPERTY_CONST),
  89         SD_BUS_PROPERTY("FlushPending", "b", bus_property_get_bool, offsetof(Socket, flush_pending), SD_BUS_VTABLE_PROPERTY_CONST),
  90         SD_BUS_PROPERTY("Writable", "b", bus_property_get_bool, offsetof(Socket, writable), SD_BUS_VTABLE_PROPERTY_CONST),
  91         SD_BUS_PROPERTY("KeepAlive", "b", bus_property_get_bool, offsetof(Socket, keep_alive), SD_BUS_VTABLE_PROPERTY_CONST),
  92         SD_BUS_PROPERTY("KeepAliveTimeUSec", "t", bus_property_get_usec, offsetof(Socket, keep_alive_time), SD_BUS_VTABLE_PROPERTY_CONST),
  93         SD_BUS_PROPERTY("KeepAliveIntervalUSec", "t", bus_property_get_usec, offsetof(Socket, keep_alive_interval), SD_BUS_VTABLE_PROPERTY_CONST),
  94         SD_BUS_PROPERTY("KeepAliveProbes", "u", bus_property_get_unsigned, offsetof(Socket, keep_alive_cnt), SD_BUS_VTABLE_PROPERTY_CONST),
  95         SD_BUS_PROPERTY("DeferAcceptUSec" , "t", bus_property_get_usec, offsetof(Socket, defer_accept), SD_BUS_VTABLE_PROPERTY_CONST),
  96         SD_BUS_PROPERTY("NoDelay", "b", bus_property_get_bool, offsetof(Socket, no_delay), SD_BUS_VTABLE_PROPERTY_CONST),
  97         SD_BUS_PROPERTY("Priority", "i", bus_property_get_int, offsetof(Socket, priority), SD_BUS_VTABLE_PROPERTY_CONST),
  98         SD_BUS_PROPERTY("ReceiveBuffer", "t", bus_property_get_size, offsetof(Socket, receive_buffer), SD_BUS_VTABLE_PROPERTY_CONST),
  99         SD_BUS_PROPERTY("SendBuffer", "t", bus_property_get_size, offsetof(Socket, send_buffer), SD_BUS_VTABLE_PROPERTY_CONST),
 100         SD_BUS_PROPERTY("IPTOS", "i", bus_property_get_int, offsetof(Socket, ip_tos), SD_BUS_VTABLE_PROPERTY_CONST),
 101         SD_BUS_PROPERTY("IPTTL", "i", bus_property_get_int, offsetof(Socket, ip_ttl), SD_BUS_VTABLE_PROPERTY_CONST),
 102         SD_BUS_PROPERTY("PipeSize", "t", bus_property_get_size, offsetof(Socket, pipe_size), SD_BUS_VTABLE_PROPERTY_CONST),
 103         SD_BUS_PROPERTY("FreeBind", "b", bus_property_get_bool, offsetof(Socket, free_bind), SD_BUS_VTABLE_PROPERTY_CONST),
 104         SD_BUS_PROPERTY("Transparent", "b", bus_property_get_bool, offsetof(Socket, transparent), SD_BUS_VTABLE_PROPERTY_CONST),
 105         SD_BUS_PROPERTY("Broadcast", "b", bus_property_get_bool, offsetof(Socket, broadcast), SD_BUS_VTABLE_PROPERTY_CONST),
 106         SD_BUS_PROPERTY("PassCredentials", "b", bus_property_get_bool, offsetof(Socket, pass_cred), SD_BUS_VTABLE_PROPERTY_CONST),
 107         SD_BUS_PROPERTY("PassSecurity", "b", bus_property_get_bool, offsetof(Socket, pass_sec), SD_BUS_VTABLE_PROPERTY_CONST),
 108         SD_BUS_PROPERTY("PassPacketInfo", "b", bus_property_get_bool, offsetof(Socket, pass_pktinfo), SD_BUS_VTABLE_PROPERTY_CONST),
 109         SD_BUS_PROPERTY("Timestamping", "s", property_get_timestamping, offsetof(Socket, timestamping), SD_BUS_VTABLE_PROPERTY_CONST),
 110         SD_BUS_PROPERTY("RemoveOnStop", "b", bus_property_get_bool, offsetof(Socket, remove_on_stop), SD_BUS_VTABLE_PROPERTY_CONST),
 111         SD_BUS_PROPERTY("Listen", "a(ss)", property_get_listen, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 112         SD_BUS_PROPERTY("Symlinks", "as", NULL, offsetof(Socket, symlinks), SD_BUS_VTABLE_PROPERTY_CONST),
 113         SD_BUS_PROPERTY("Mark", "i", bus_property_get_int, offsetof(Socket, mark), SD_BUS_VTABLE_PROPERTY_CONST),
 114         SD_BUS_PROPERTY("MaxConnections", "u", bus_property_get_unsigned, offsetof(Socket, max_connections), SD_BUS_VTABLE_PROPERTY_CONST),
 115         SD_BUS_PROPERTY("MaxConnectionsPerSource", "u", bus_property_get_unsigned, offsetof(Socket, max_connections_per_source), SD_BUS_VTABLE_PROPERTY_CONST),
 116         SD_BUS_PROPERTY("MessageQueueMaxMessages", "x", bus_property_get_long, offsetof(Socket, mq_maxmsg), SD_BUS_VTABLE_PROPERTY_CONST),
 117         SD_BUS_PROPERTY("MessageQueueMessageSize", "x", bus_property_get_long, offsetof(Socket, mq_msgsize), SD_BUS_VTABLE_PROPERTY_CONST),
 118         SD_BUS_PROPERTY("TCPCongestion", "s", NULL, offsetof(Socket, tcp_congestion), SD_BUS_VTABLE_PROPERTY_CONST),
 119         SD_BUS_PROPERTY("ReusePort", "b",  bus_property_get_bool, offsetof(Socket, reuse_port), SD_BUS_VTABLE_PROPERTY_CONST),
 120         SD_BUS_PROPERTY("SmackLabel", "s", NULL, offsetof(Socket, smack), SD_BUS_VTABLE_PROPERTY_CONST),
 121         SD_BUS_PROPERTY("SmackLabelIPIn", "s", NULL, offsetof(Socket, smack_ip_in), SD_BUS_VTABLE_PROPERTY_CONST),
 122         SD_BUS_PROPERTY("SmackLabelIPOut", "s", NULL, offsetof(Socket, smack_ip_out), SD_BUS_VTABLE_PROPERTY_CONST),
 123         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Socket, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 124         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Socket, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 125         SD_BUS_PROPERTY("NConnections", "u", bus_property_get_unsigned, offsetof(Socket, n_connections), 0),
 126         SD_BUS_PROPERTY("NAccepted", "u", bus_property_get_unsigned, offsetof(Socket, n_accepted), 0),
 127         SD_BUS_PROPERTY("NRefused", "u", bus_property_get_unsigned, offsetof(Socket, n_refused), 0),
 128         SD_BUS_PROPERTY("FileDescriptorName", "s", property_get_fdname, 0, 0),
 129         SD_BUS_PROPERTY("SocketProtocol", "i", bus_property_get_int, offsetof(Socket, socket_protocol), SD_BUS_VTABLE_PROPERTY_CONST),
 130         SD_BUS_PROPERTY("TriggerLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Socket, trigger_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
 131         SD_BUS_PROPERTY("TriggerLimitBurst", "u", bus_property_get_unsigned, offsetof(Socket, trigger_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
 132         SD_BUS_PROPERTY("PollLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Socket, poll_limit_interval), SD_BUS_VTABLE_PROPERTY_CONST),
 133         SD_BUS_PROPERTY("PollLimitBurst", "u", bus_property_get_unsigned, offsetof(Socket, poll_limit_burst), SD_BUS_VTABLE_PROPERTY_CONST),
 134         SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 135         SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 136         BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPre", offsetof(Socket, exec_command[SOCKET_EXEC_START_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 137         BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPost", offsetof(Socket, exec_command[SOCKET_EXEC_START_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 138         BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPre", offsetof(Socket, exec_command[SOCKET_EXEC_STOP_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 139         BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPost", offsetof(Socket, exec_command[SOCKET_EXEC_STOP_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 140         SD_BUS_VTABLE_END
 141 };
 142
 143 static bool check_size_t_truncation(uint64_t t) {
 144         return (size_t) t == t;
 145 }
 146
 147 static const char* socket_protocol_to_string(int32_t i) {
 148         if (i == IPPROTO_IP)
 149                 return "";
 150
 151         if (!IN_SET(i, IPPROTO_UDPLITE, IPPROTO_SCTP))
 152                 return NULL;
 153
 154         return ip_protocol_to_name(i);
 155 }
 156
 157 static BUS_DEFINE_SET_TRANSIENT(int, "i", int32_t, int, "%" PRIi32);
 158 static BUS_DEFINE_SET_TRANSIENT(message_queue, "x", int64_t, long, "%" PRIi64);
 159 static BUS_DEFINE_SET_TRANSIENT_IS_VALID(size_t_check_truncation, "t", uint64_t, size_t, "%" PRIu64, check_size_t_truncation);
 160 static BUS_DEFINE_SET_TRANSIENT_PARSE(bind_ipv6_only, SocketAddressBindIPv6Only, socket_address_bind_ipv6_only_or_bool_from_string);
 161 static BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(fdname, fdname_is_valid);
 162 static BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(ifname, ifname_valid);
 163 static BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(ip_tos, "i", int32_t, int, "%" PRIi32, ip_tos_to_string_alloc);
 164 static BUS_DEFINE_SET_TRANSIENT_TO_STRING(socket_protocol, "i", int32_t, int, "%" PRIi32, socket_protocol_to_string);
 165 static BUS_DEFINE_SET_TRANSIENT_PARSE(socket_timestamping, SocketTimestamping, socket_timestamping_from_string_harder);
 166
 167 static int bus_socket_set_transient_property(
 168                 Socket *s,
 169                 const char *name,
 170                 sd_bus_message *message,
 171                 UnitWriteFlags flags,
 172                 sd_bus_error *error) {
 173
 174         SocketExecCommand ci;
 175         Unit *u = UNIT(s);
 176         int r;
 177
 178         assert(s);
 179         assert(name);
 180         assert(message);
 181
 182         flags |= UNIT_PRIVATE;
 183
 184         if (streq(name, "Accept"))
 185                 return bus_set_transient_bool(u, name, &s->accept, message, flags, error);
 186
 187         if (streq(name, "FlushPending"))
 188                 return bus_set_transient_bool(u, name, &s->flush_pending, message, flags, error);
 189
 190         if (streq(name, "Writable"))
 191                 return bus_set_transient_bool(u, name, &s->writable, message, flags, error);
 192
 193         if (streq(name, "KeepAlive"))
 194                 return bus_set_transient_bool(u, name, &s->keep_alive, message, flags, error);
 195
 196         if (streq(name, "NoDelay"))
 197                 return bus_set_transient_bool(u, name, &s->no_delay, message, flags, error);
 198
 199         if (streq(name, "FreeBind"))
 200                 return bus_set_transient_bool(u, name, &s->free_bind, message, flags, error);
 201
 202         if (streq(name, "Transparent"))
 203                 return bus_set_transient_bool(u, name, &s->transparent, message, flags, error);
 204
 205         if (streq(name, "Broadcast"))
 206                 return bus_set_transient_bool(u, name, &s->broadcast, message, flags, error);
 207
 208         if (streq(name, "PassCredentials"))
 209                 return bus_set_transient_bool(u, name, &s->pass_cred, message, flags, error);
 210
 211         if (streq(name, "PassSecurity"))
 212                 return bus_set_transient_bool(u, name, &s->pass_sec, message, flags, error);
 213
 214         if (streq(name, "PassPacketInfo"))
 215                 return bus_set_transient_bool(u, name, &s->pass_pktinfo, message, flags, error);
 216
 217         if (streq(name, "Timestamping"))
 218                 return bus_set_transient_socket_timestamping(u, name, &s->timestamping, message, flags, error);
 219
 220         if (streq(name, "ReusePort"))
 221                 return bus_set_transient_bool(u, name, &s->reuse_port, message, flags, error);
 222
 223         if (streq(name, "RemoveOnStop"))
 224                 return bus_set_transient_bool(u, name, &s->remove_on_stop, message, flags, error);
 225
 226         if (streq(name, "SELinuxContextFromNet"))
 227                 return bus_set_transient_bool(u, name, &s->selinux_context_from_net, message, flags, error);
 228
 229         if (streq(name, "Priority"))
 230                 return bus_set_transient_int(u, name, &s->priority, message, flags, error);
 231
 232         if (streq(name, "IPTTL"))
 233                 return bus_set_transient_int(u, name, &s->ip_ttl, message, flags, error);
 234
 235         if (streq(name, "Mark"))
 236                 return bus_set_transient_int(u, name, &s->mark, message, flags, error);
 237
 238         if (streq(name, "Backlog"))
 239                 return bus_set_transient_unsigned(u, name, &s->backlog, message, flags, error);
 240
 241         if (streq(name, "MaxConnections"))
 242                 return bus_set_transient_unsigned(u, name, &s->max_connections, message, flags, error);
 243
 244         if (streq(name, "MaxConnectionsPerSource"))
 245                 return bus_set_transient_unsigned(u, name, &s->max_connections_per_source, message, flags, error);
 246
 247         if (streq(name, "KeepAliveProbes"))
 248                 return bus_set_transient_unsigned(u, name, &s->keep_alive_cnt, message, flags, error);
 249
 250         if (streq(name, "TriggerLimitBurst"))
 251                 return bus_set_transient_unsigned(u, name, &s->trigger_limit.burst, message, flags, error);
 252
 253         if (streq(name, "PollLimitBurst"))
 254                 return bus_set_transient_unsigned(u, name, &s->poll_limit_burst, message, flags, error);
 255
 256         if (streq(name, "SocketMode"))
 257                 return bus_set_transient_mode_t(u, name, &s->socket_mode, message, flags, error);
 258
 259         if (streq(name, "DirectoryMode"))
 260                 return bus_set_transient_mode_t(u, name, &s->directory_mode, message, flags, error);
 261
 262         if (streq(name, "MessageQueueMaxMessages"))
 263                 return bus_set_transient_message_queue(u, name, &s->mq_maxmsg, message, flags, error);
 264
 265         if (streq(name, "MessageQueueMessageSize"))
 266                 return bus_set_transient_message_queue(u, name, &s->mq_msgsize, message, flags, error);
 267
 268         if (streq(name, "TimeoutUSec"))
 269                 return bus_set_transient_usec_fix_0(u, name, &s->timeout_usec, message, flags, error);
 270
 271         if (streq(name, "KeepAliveTimeUSec"))
 272                 return bus_set_transient_usec(u, name, &s->keep_alive_time, message, flags, error);
 273
 274         if (streq(name, "KeepAliveIntervalUSec"))
 275                 return bus_set_transient_usec(u, name, &s->keep_alive_interval, message, flags, error);
 276
 277         if (streq(name, "DeferAcceptUSec"))
 278                 return bus_set_transient_usec(u, name, &s->defer_accept, message, flags, error);
 279
 280         if (streq(name, "TriggerLimitIntervalUSec"))
 281                 return bus_set_transient_usec(u, name, &s->trigger_limit.interval, message, flags, error);
 282
 283         if (streq(name, "PollLimitIntervalUSec"))
 284                 return bus_set_transient_usec(u, name, &s->poll_limit_interval, message, flags, error);
 285
 286         if (streq(name, "SmackLabel"))
 287                 return bus_set_transient_string(u, name, &s->smack, message, flags, error);
 288
 289         if (streq(name, "SmackLabelIPin"))
 290                 return bus_set_transient_string(u, name, &s->smack_ip_in, message, flags, error);
 291
 292         if (streq(name, "SmackLabelIPOut"))
 293                 return bus_set_transient_string(u, name, &s->smack_ip_out, message, flags, error);
 294
 295         if (streq(name, "TCPCongestion"))
 296                 return bus_set_transient_string(u, name, &s->tcp_congestion, message, flags, error);
 297
 298         if (streq(name, "FileDescriptorName"))
 299                 return bus_set_transient_fdname(u, name, &s->fdname, message, flags, error);
 300
 301         if (streq(name, "SocketUser"))
 302                 return bus_set_transient_user_relaxed(u, name, &s->user, message, flags, error);
 303
 304         if (streq(name, "SocketGroup"))
 305                 return bus_set_transient_user_relaxed(u, name, &s->group, message, flags, error);
 306
 307         if (streq(name, "BindIPv6Only"))
 308                 return bus_set_transient_bind_ipv6_only(u, name, &s->bind_ipv6_only, message, flags, error);
 309
 310         if (streq(name, "ReceiveBuffer"))
 311                 return bus_set_transient_size_t_check_truncation(u, name, &s->receive_buffer, message, flags, error);
 312
 313         if (streq(name, "SendBuffer"))
 314                 return bus_set_transient_size_t_check_truncation(u, name, &s->send_buffer, message, flags, error);
 315
 316         if (streq(name, "PipeSize"))
 317                 return bus_set_transient_size_t_check_truncation(u, name, &s->pipe_size, message, flags, error);
 318
 319         if (streq(name, "BindToDevice"))
 320                 return bus_set_transient_ifname(u, name, &s->bind_to_device, message, flags, error);
 321
 322         if (streq(name, "IPTOS"))
 323                 return bus_set_transient_ip_tos(u, name, &s->ip_tos, message, flags, error);
 324
 325         if (streq(name, "SocketProtocol"))
 326                 return bus_set_transient_socket_protocol(u, name, &s->socket_protocol, message, flags, error);
 327
 328         ci = socket_exec_command_from_string(name);
 329         if (ci >= 0)
 330                 return bus_set_transient_exec_command(u, name,
 331                                                       &s->exec_command[ci],
 332                                                       message, flags, error);
 333
 334         if (streq(name, "Symlinks")) {
 335                 _cleanup_strv_free_ char **l = NULL;
 336
 337                 r = sd_bus_message_read_strv(message, &l);
 338                 if (r < 0)
 339                         return r;
 340
 341                 STRV_FOREACH(p, l)
 342                         if (!path_is_absolute(*p))
 343                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Symlink path is not absolute: %s", *p);
 344
 345                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
 346                         if (strv_isempty(l)) {
 347                                 s->symlinks = strv_free(s->symlinks);
 348                                 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "%s=", name);
 349                         } else {
 350                                 _cleanup_free_ char *joined = NULL;
 351
 352                                 r = strv_extend_strv(&s->symlinks, l, true);
 353                                 if (r < 0)
 354                                         return -ENOMEM;
 355
 356                                 joined = strv_join(l, " ");
 357                                 if (!joined)
 358                                         return -ENOMEM;
 359
 360                                 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "%s=%s", name, joined);
 361                         }
 362                 }
 363
 364                 return 1;
 365
 366         } else if (streq(name, "Listen")) {
 367                 const char *t, *a;
 368                 bool empty = true;
 369
 370                 r = sd_bus_message_enter_container(message, 'a', "(ss)");
 371                 if (r < 0)
 372                         return r;
 373
 374                 while ((r = sd_bus_message_read(message, "(ss)", &t, &a)) > 0) {
 375                         _cleanup_(socket_port_freep) SocketPort *p = NULL;
 376
 377                         p = new(SocketPort, 1);
 378                         if (!p)
 379                                 return log_oom();
 380
 381                         *p = (SocketPort) {
 382                                 .fd = -EBADF,
 383                                 .socket = s,
 384                         };
 385
 386                         p->type = socket_port_type_from_string(t);
 387                         if (p->type < 0)
 388                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown Socket type: %s", t);
 389
 390                         if (p->type != SOCKET_SOCKET) {
 391                                 if (!path_is_absolute(a) || !path_is_valid(a))
 392                                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid socket path: %s", a);
 393
 394                                 r = path_simplify_alloc(a, &p->path);
 395                                 if (r < 0)
 396                                         return r;
 397
 398                         } else if (streq(t, "Netlink")) {
 399                                 r = socket_address_parse_netlink(&p->address, a);
 400                                 if (r < 0)
 401                                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid netlink address: %s", a);
 402
 403                         } else {
 404                                 r = socket_address_parse(&p->address, a);
 405                                 if (r < 0)
 406                                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address: %s", a);
 407
 408                                 p->address.type = socket_address_type_from_string(t);
 409                                 if (p->address.type < 0)
 410                                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address type: %s", t);
 411
 412                                 if (socket_address_family(&p->address) != AF_UNIX && p->address.type == SOCK_SEQPACKET)
 413                                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Address family not supported: %s", a);
 414                         }
 415
 416                         empty = false;
 417
 418                         if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
 419                                 LIST_APPEND(port, s->ports, TAKE_PTR(p));
 420                                 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "Listen%s=%s", t, a);
 421                         }
 422                 }
 423                 if (r < 0)
 424                         return r;
 425
 426                 r = sd_bus_message_exit_container(message);
 427                 if (r < 0)
 428                         return r;
 429
 430                 if (!UNIT_WRITE_FLAGS_NOOP(flags) && empty) {
 431                         socket_free_ports(s);
 432                         unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "ListenStream=");
 433                 }
 434
 435                 return 1;
 436         }
 437
 438         return 0;
 439 }
 440
 441 int bus_socket_set_property(
 442                 Unit *u,
 443                 const char *name,
 444                 sd_bus_message *message,
 445                 UnitWriteFlags flags,
 446                 sd_bus_error *error) {
 447
 448         Socket *s = SOCKET(u);
 449         int r;
 450
 451         assert(s);
 452         assert(name);
 453         assert(message);
 454
 455         assert(s);
 456         assert(name);
 457         assert(message);
 458
 459         r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, error);
 460         if (r != 0)
 461                 return r;
 462
 463         if (u->transient && u->load_state == UNIT_STUB) {
 464                 /* This is a transient unit, let's load a little more */
 465
 466                 r = bus_socket_set_transient_property(s, name, message, flags, error);
 467                 if (r != 0)
 468                         return r;
 469
 470                 r = bus_exec_context_set_transient_property(u, &s->exec_context, name, message, flags, error);
 471                 if (r != 0)
 472                         return r;
 473
 474                 r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error);
 475                 if (r != 0)
 476                         return r;
 477         }
 478
 479         return 0;
 480 }
 481
 482 int bus_socket_commit_properties(Unit *u) {
 483         assert(u);
 484
 485         unit_realize_cgroup(u);
 486
 487         return 0;
 488 }