src/socket.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <sys/epoll.h>
  28 #include <signal.h>
  29 #include <arpa/inet.h>
  30 #include <mqueue.h>
  31
  32 #include "unit.h"
  33 #include "socket.h"
  34 #include "netinet/tcp.h"
  35 #include "log.h"
  36 #include "load-dropin.h"
  37 #include "load-fragment.h"
  38 #include "strv.h"
  39 #include "unit-name.h"
  40 #include "dbus-socket.h"
  41 #include "missing.h"
  42 #include "special.h"
  43 #include "bus-errors.h"
  44 #include "label.h"
  45 #include "exit-status.h"
  46 #include "def.h"
  47
  48 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  49         [SOCKET_DEAD] = UNIT_INACTIVE,
  50         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  51         [SOCKET_START_POST] = UNIT_ACTIVATING,
  52         [SOCKET_LISTENING] = UNIT_ACTIVE,
  53         [SOCKET_RUNNING] = UNIT_ACTIVE,
  54         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  55         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  56         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  57         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  58         [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  59         [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  60         [SOCKET_FAILED] = UNIT_FAILED
  61 };
  62
  63 static void socket_init(Unit *u) {
  64         Socket *s = SOCKET(u);
  65
  66         assert(u);
  67         assert(u->meta.load_state == UNIT_STUB);
  68
  69         s->backlog = SOMAXCONN;
  70         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  71         s->directory_mode = 0755;
  72         s->socket_mode = 0666;
  73
  74         s->max_connections = 64;
  75
  76         s->priority = -1;
  77         s->ip_tos = -1;
  78         s->ip_ttl = -1;
  79         s->mark = -1;
  80
  81         exec_context_init(&s->exec_context);
  82         s->exec_context.std_output = u->meta.manager->default_std_output;
  83         s->exec_context.std_error = u->meta.manager->default_std_error;
  84
  85         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  86 }
  87
  88 static void socket_unwatch_control_pid(Socket *s) {
  89         assert(s);
  90
  91         if (s->control_pid <= 0)
  92                 return;
  93
  94         unit_unwatch_pid(UNIT(s), s->control_pid);
  95         s->control_pid = 0;
  96 }
  97
  98 static void socket_done(Unit *u) {
  99         Socket *s = SOCKET(u);
 100         SocketPort *p;
 101
 102         assert(s);
 103
 104         while ((p = s->ports)) {
 105                 LIST_REMOVE(SocketPort, port, s->ports, p);
 106
 107                 if (p->fd >= 0) {
 108                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 109                         close_nointr_nofail(p->fd);
 110                 }
 111
 112                 free(p->path);
 113                 free(p);
 114         }
 115
 116         exec_context_done(&s->exec_context);
 117         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 118         s->control_command = NULL;
 119
 120         socket_unwatch_control_pid(s);
 121
 122         unit_ref_unset(&s->service);
 123
 124         free(s->tcp_congestion);
 125         s->tcp_congestion = NULL;
 126
 127         free(s->bind_to_device);
 128         s->bind_to_device = NULL;
 129
 130         unit_unwatch_timer(u, &s->timer_watch);
 131 }
 132
 133 static int socket_instantiate_service(Socket *s) {
 134         char *prefix, *name;
 135         int r;
 136         Unit *u;
 137
 138         assert(s);
 139
 140         /* This fills in s->service if it isn't filled in yet. For
 141          * Accept=yes sockets we create the next connection service
 142          * here. For Accept=no this is mostly a NOP since the service
 143          * is figured out at load time anyway. */
 144
 145         if (UNIT_DEREF(s->service))
 146                 return 0;
 147
 148         assert(s->accept);
 149
 150         if (!(prefix = unit_name_to_prefix(s->meta.id)))
 151                 return -ENOMEM;
 152
 153         r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
 154         free(prefix);
 155
 156         if (r < 0)
 157                 return -ENOMEM;
 158
 159         r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
 160         free(name);
 161
 162         if (r < 0)
 163                 return r;
 164
 165 #ifdef HAVE_SYSV_COMPAT
 166         if (SERVICE(u)->sysv_path) {
 167                 log_error("Using SysV services for socket activation is not supported. Refusing.");
 168                 return -ENOENT;
 169         }
 170 #endif
 171
 172         u->meta.no_gc = true;
 173         unit_ref_set(&s->service, u);
 174
 175         return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
 176 }
 177
 178 static bool have_non_accept_socket(Socket *s) {
 179         SocketPort *p;
 180
 181         assert(s);
 182
 183         if (!s->accept)
 184                 return true;
 185
 186         LIST_FOREACH(port, p, s->ports) {
 187
 188                 if (p->type != SOCKET_SOCKET)
 189                         return true;
 190
 191                 if (!socket_address_can_accept(&p->address))
 192                         return true;
 193         }
 194
 195         return false;
 196 }
 197
 198 static int socket_verify(Socket *s) {
 199         assert(s);
 200
 201         if (s->meta.load_state != UNIT_LOADED)
 202                 return 0;
 203
 204         if (!s->ports) {
 205                 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
 206                 return -EINVAL;
 207         }
 208
 209         if (s->accept && have_non_accept_socket(s)) {
 210                 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
 211                 return -EINVAL;
 212         }
 213
 214         if (s->accept && s->max_connections <= 0) {
 215                 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
 216                 return -EINVAL;
 217         }
 218
 219         if (s->accept && UNIT_DEREF(s->service)) {
 220                 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", s->meta.id);
 221                 return -EINVAL;
 222         }
 223
 224         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 225                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 226                 return -EINVAL;
 227         }
 228
 229         return 0;
 230 }
 231
 232 static bool socket_needs_mount(Socket *s, const char *prefix) {
 233         SocketPort *p;
 234
 235         assert(s);
 236
 237         LIST_FOREACH(port, p, s->ports) {
 238
 239                 if (p->type == SOCKET_SOCKET) {
 240                         if (socket_address_needs_mount(&p->address, prefix))
 241                                 return true;
 242                 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
 243                         if (path_startswith(p->path, prefix))
 244                                 return true;
 245                 }
 246         }
 247
 248         return false;
 249 }
 250
 251 int socket_add_one_mount_link(Socket *s, Mount *m) {
 252         int r;
 253
 254         assert(s);
 255         assert(m);
 256
 257         if (s->meta.load_state != UNIT_LOADED ||
 258             m->meta.load_state != UNIT_LOADED)
 259                 return 0;
 260
 261         if (!socket_needs_mount(s, m->where))
 262                 return 0;
 263
 264         if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
 265                 return r;
 266
 267         return 0;
 268 }
 269
 270 static int socket_add_mount_links(Socket *s) {
 271         Meta *other;
 272         int r;
 273
 274         assert(s);
 275
 276         LIST_FOREACH(units_by_type, other, s->meta.manager->units_by_type[UNIT_MOUNT])
 277                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 278                         return r;
 279
 280         return 0;
 281 }
 282
 283 static int socket_add_device_link(Socket *s) {
 284         char *t;
 285         int r;
 286
 287         assert(s);
 288
 289         if (!s->bind_to_device)
 290                 return 0;
 291
 292         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 293                 return -ENOMEM;
 294
 295         r = unit_add_node_link(UNIT(s), t, false);
 296         free(t);
 297
 298         return r;
 299 }
 300
 301 static int socket_add_default_dependencies(Socket *s) {
 302         int r;
 303         assert(s);
 304
 305         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 306                 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 307                         return r;
 308
 309                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
 310                         return r;
 311         }
 312
 313         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 314 }
 315
 316 static bool socket_has_exec(Socket *s) {
 317         unsigned i;
 318         assert(s);
 319
 320         for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
 321                 if (s->exec_command[i])
 322                         return true;
 323
 324         return false;
 325 }
 326
 327 static int socket_load(Unit *u) {
 328         Socket *s = SOCKET(u);
 329         int r;
 330
 331         assert(u);
 332         assert(u->meta.load_state == UNIT_STUB);
 333
 334         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 335                 return r;
 336
 337         /* This is a new unit? Then let's add in some extras */
 338         if (u->meta.load_state == UNIT_LOADED) {
 339
 340                 if (have_non_accept_socket(s)) {
 341
 342                         if (!UNIT_DEREF(s->service)) {
 343                                 Unit *x;
 344
 345                                 r = unit_load_related_unit(u, ".service", &x);
 346                                 if (r < 0)
 347                                         return r;
 348
 349                                 unit_ref_set(&s->service, x);
 350                         }
 351
 352                         r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
 353                         if (r < 0)
 354                                 return r;
 355                 }
 356
 357                 if ((r = socket_add_mount_links(s)) < 0)
 358                         return r;
 359
 360                 if ((r = socket_add_device_link(s)) < 0)
 361                         return r;
 362
 363                 if (socket_has_exec(s))
 364                         if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 365                                 return r;
 366
 367                 if ((r = unit_add_default_cgroups(u)) < 0)
 368                         return r;
 369
 370                 if (s->meta.default_dependencies)
 371                         if ((r = socket_add_default_dependencies(s)) < 0)
 372                                 return r;
 373         }
 374
 375         return socket_verify(s);
 376 }
 377
 378 static const char* listen_lookup(int family, int type) {
 379
 380         if (family == AF_NETLINK)
 381                 return "ListenNetlink";
 382
 383         if (type == SOCK_STREAM)
 384                 return "ListenStream";
 385         else if (type == SOCK_DGRAM)
 386                 return "ListenDatagram";
 387         else if (type == SOCK_SEQPACKET)
 388                 return "ListenSequentialPacket";
 389
 390         assert_not_reached("Unknown socket type");
 391         return NULL;
 392 }
 393
 394 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 395
 396         SocketExecCommand c;
 397         Socket *s = SOCKET(u);
 398         SocketPort *p;
 399         const char *prefix2;
 400         char *p2;
 401
 402         assert(s);
 403         assert(f);
 404
 405         p2 = strappend(prefix, "\t");
 406         prefix2 = p2 ? p2 : prefix;
 407
 408         fprintf(f,
 409                 "%sSocket State: %s\n"
 410                 "%sBindIPv6Only: %s\n"
 411                 "%sBacklog: %u\n"
 412                 "%sSocketMode: %04o\n"
 413                 "%sDirectoryMode: %04o\n"
 414                 "%sKeepAlive: %s\n"
 415                 "%sFreeBind: %s\n"
 416                 "%sTransparent: %s\n"
 417                 "%sBroadcast: %s\n"
 418                 "%sPassCrededentials: %s\n"
 419                 "%sTCPCongestion: %s\n",
 420                 prefix, socket_state_to_string(s->state),
 421                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 422                 prefix, s->backlog,
 423                 prefix, s->socket_mode,
 424                 prefix, s->directory_mode,
 425                 prefix, yes_no(s->keep_alive),
 426                 prefix, yes_no(s->free_bind),
 427                 prefix, yes_no(s->transparent),
 428                 prefix, yes_no(s->broadcast),
 429                 prefix, yes_no(s->pass_cred),
 430                 prefix, strna(s->tcp_congestion));
 431
 432         if (s->control_pid > 0)
 433                 fprintf(f,
 434                         "%sControl PID: %lu\n",
 435                         prefix, (unsigned long) s->control_pid);
 436
 437         if (s->bind_to_device)
 438                 fprintf(f,
 439                         "%sBindToDevice: %s\n",
 440                         prefix, s->bind_to_device);
 441
 442         if (s->accept)
 443                 fprintf(f,
 444                         "%sAccepted: %u\n"
 445                         "%sNConnections: %u\n"
 446                         "%sMaxConnections: %u\n",
 447                         prefix, s->n_accepted,
 448                         prefix, s->n_connections,
 449                         prefix, s->max_connections);
 450
 451         if (s->priority >= 0)
 452                 fprintf(f,
 453                         "%sPriority: %i\n",
 454                         prefix, s->priority);
 455
 456         if (s->receive_buffer > 0)
 457                 fprintf(f,
 458                         "%sReceiveBuffer: %zu\n",
 459                         prefix, s->receive_buffer);
 460
 461         if (s->send_buffer > 0)
 462                 fprintf(f,
 463                         "%sSendBuffer: %zu\n",
 464                         prefix, s->send_buffer);
 465
 466         if (s->ip_tos >= 0)
 467                 fprintf(f,
 468                         "%sIPTOS: %i\n",
 469                         prefix, s->ip_tos);
 470
 471         if (s->ip_ttl >= 0)
 472                 fprintf(f,
 473                         "%sIPTTL: %i\n",
 474                         prefix, s->ip_ttl);
 475
 476         if (s->pipe_size > 0)
 477                 fprintf(f,
 478                         "%sPipeSize: %zu\n",
 479                         prefix, s->pipe_size);
 480
 481         if (s->mark >= 0)
 482                 fprintf(f,
 483                         "%sMark: %i\n",
 484                         prefix, s->mark);
 485
 486         if (s->mq_maxmsg > 0)
 487                 fprintf(f,
 488                         "%sMessageQueueMaxMessages: %li\n",
 489                         prefix, s->mq_maxmsg);
 490
 491         if (s->mq_msgsize > 0)
 492                 fprintf(f,
 493                         "%sMessageQueueMessageSize: %li\n",
 494                         prefix, s->mq_msgsize);
 495
 496         LIST_FOREACH(port, p, s->ports) {
 497
 498                 if (p->type == SOCKET_SOCKET) {
 499                         const char *t;
 500                         int r;
 501                         char *k = NULL;
 502
 503                         if ((r = socket_address_print(&p->address, &k)) < 0)
 504                                 t = strerror(-r);
 505                         else
 506                                 t = k;
 507
 508                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
 509                         free(k);
 510                 } else if (p->type == SOCKET_SPECIAL)
 511                         fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
 512                 else if (p->type == SOCKET_MQUEUE)
 513                         fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
 514                 else
 515                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 516         }
 517
 518         exec_context_dump(&s->exec_context, f, prefix);
 519
 520         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 521                 if (!s->exec_command[c])
 522                         continue;
 523
 524                 fprintf(f, "%s-> %s:\n",
 525                         prefix, socket_exec_command_to_string(c));
 526
 527                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 528         }
 529
 530         free(p2);
 531 }
 532
 533 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 534         socklen_t l;
 535         char *r;
 536         union {
 537                 struct sockaddr sa;
 538                 struct sockaddr_un un;
 539                 struct sockaddr_in in;
 540                 struct sockaddr_in6 in6;
 541                 struct sockaddr_storage storage;
 542         } local, remote;
 543
 544         assert(fd >= 0);
 545         assert(instance);
 546
 547         l = sizeof(local);
 548         if (getsockname(fd, &local.sa, &l) < 0)
 549                 return -errno;
 550
 551         l = sizeof(remote);
 552         if (getpeername(fd, &remote.sa, &l) < 0)
 553                 return -errno;
 554
 555         switch (local.sa.sa_family) {
 556
 557         case AF_INET: {
 558                 uint32_t
 559                         a = ntohl(local.in.sin_addr.s_addr),
 560                         b = ntohl(remote.in.sin_addr.s_addr);
 561
 562                 if (asprintf(&r,
 563                              "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 564                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 565                              ntohs(local.in.sin_port),
 566                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 567                              ntohs(remote.in.sin_port)) < 0)
 568                         return -ENOMEM;
 569
 570                 break;
 571         }
 572
 573         case AF_INET6: {
 574                 static const char ipv4_prefix[] = {
 575                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 576                 };
 577
 578                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 579                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 580                         const uint8_t
 581                                 *a = local.in6.sin6_addr.s6_addr+12,
 582                                 *b = remote.in6.sin6_addr.s6_addr+12;
 583
 584                         if (asprintf(&r,
 585                                      "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 586                                      a[0], a[1], a[2], a[3],
 587                                      ntohs(local.in6.sin6_port),
 588                                      b[0], b[1], b[2], b[3],
 589                                      ntohs(remote.in6.sin6_port)) < 0)
 590                                 return -ENOMEM;
 591                 } else {
 592                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 593
 594                         if (asprintf(&r,
 595                                      "%s:%u-%s:%u",
 596                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 597                                      ntohs(local.in6.sin6_port),
 598                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 599                                      ntohs(remote.in6.sin6_port)) < 0)
 600                                 return -ENOMEM;
 601                 }
 602
 603                 break;
 604         }
 605
 606         case AF_UNIX: {
 607                 struct ucred ucred;
 608
 609                 l = sizeof(ucred);
 610                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 611                         return -errno;
 612
 613                 if (asprintf(&r,
 614                              "%u-%lu-%lu",
 615                              nr,
 616                              (unsigned long) ucred.pid,
 617                              (unsigned long) ucred.uid) < 0)
 618                         return -ENOMEM;
 619
 620                 break;
 621         }
 622
 623         default:
 624                 assert_not_reached("Unhandled socket type.");
 625         }
 626
 627         *instance = r;
 628         return 0;
 629 }
 630
 631 static void socket_close_fds(Socket *s) {
 632         SocketPort *p;
 633
 634         assert(s);
 635
 636         LIST_FOREACH(port, p, s->ports) {
 637                 if (p->fd < 0)
 638                         continue;
 639
 640                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 641                 close_nointr_nofail(p->fd);
 642
 643                 /* One little note: we should never delete any sockets
 644                  * in the file system here! After all some other
 645                  * process we spawned might still have a reference of
 646                  * this fd and wants to continue to use it. Therefore
 647                  * we delete sockets in the file system before we
 648                  * create a new one, not after we stopped using
 649                  * one! */
 650
 651                 p->fd = -1;
 652         }
 653 }
 654
 655 static void socket_apply_socket_options(Socket *s, int fd) {
 656         assert(s);
 657         assert(fd >= 0);
 658
 659         if (s->keep_alive) {
 660                 int b = s->keep_alive;
 661                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 662                         log_warning("SO_KEEPALIVE failed: %m");
 663         }
 664
 665         if (s->broadcast) {
 666                 int one = 1;
 667                 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
 668                         log_warning("SO_BROADCAST failed: %m");
 669         }
 670
 671         if (s->pass_cred) {
 672                 int one = 1;
 673                 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
 674                         log_warning("SO_PASSCRED failed: %m");
 675         }
 676
 677         if (s->priority >= 0)
 678                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 679                         log_warning("SO_PRIORITY failed: %m");
 680
 681         if (s->receive_buffer > 0) {
 682                 int value = (int) s->receive_buffer;
 683                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
 684                         log_warning("SO_RCVBUFFORCE failed: %m");
 685         }
 686
 687         if (s->send_buffer > 0) {
 688                 int value = (int) s->send_buffer;
 689                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
 690                         log_warning("SO_SNDBUFFORCE failed: %m");
 691         }
 692
 693         if (s->mark >= 0)
 694                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 695                         log_warning("SO_MARK failed: %m");
 696
 697         if (s->ip_tos >= 0)
 698                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 699                         log_warning("IP_TOS failed: %m");
 700
 701         if (s->ip_ttl >= 0) {
 702                 int r, x;
 703
 704                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
 705
 706                 if (socket_ipv6_is_supported())
 707                         x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
 708                 else {
 709                         x = -1;
 710                         errno = EAFNOSUPPORT;
 711                 }
 712
 713                 if (r < 0 && x < 0)
 714                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
 715         }
 716
 717         if (s->tcp_congestion)
 718                 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
 719                         log_warning("TCP_CONGESTION failed: %m");
 720 }
 721
 722 static void socket_apply_fifo_options(Socket *s, int fd) {
 723         assert(s);
 724         assert(fd >= 0);
 725
 726         if (s->pipe_size > 0)
 727                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 728                         log_warning("F_SETPIPE_SZ: %m");
 729 }
 730
 731 static int fifo_address_create(
 732                 const char *path,
 733                 mode_t directory_mode,
 734                 mode_t socket_mode,
 735                 int *_fd) {
 736
 737         int fd = -1, r = 0;
 738         struct stat st;
 739         mode_t old_mask;
 740
 741         assert(path);
 742         assert(_fd);
 743
 744         mkdir_parents(path, directory_mode);
 745
 746         if ((r = label_fifofile_set(path)) < 0)
 747                 goto fail;
 748
 749         /* Enforce the right access mode for the fifo */
 750         old_mask = umask(~ socket_mode);
 751
 752         /* Include the original umask in our mask */
 753         umask(~socket_mode | old_mask);
 754
 755         r = mkfifo(path, socket_mode);
 756         umask(old_mask);
 757
 758         if (r < 0 && errno != EEXIST) {
 759                 r = -errno;
 760                 goto fail;
 761         }
 762
 763         if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 764                 r = -errno;
 765                 goto fail;
 766         }
 767
 768         label_file_clear();
 769
 770         if (fstat(fd, &st) < 0) {
 771                 r = -errno;
 772                 goto fail;
 773         }
 774
 775         if (!S_ISFIFO(st.st_mode) ||
 776             (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
 777             st.st_uid != getuid() ||
 778             st.st_gid != getgid()) {
 779
 780                 r = -EEXIST;
 781                 goto fail;
 782         }
 783
 784         *_fd = fd;
 785         return 0;
 786
 787 fail:
 788         label_file_clear();
 789
 790         if (fd >= 0)
 791                 close_nointr_nofail(fd);
 792
 793         return r;
 794 }
 795
 796 static int special_address_create(
 797                 const char *path,
 798                 int *_fd) {
 799
 800         int fd = -1, r = 0;
 801         struct stat st;
 802
 803         assert(path);
 804         assert(_fd);
 805
 806         if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 807                 r = -errno;
 808                 goto fail;
 809         }
 810
 811         if (fstat(fd, &st) < 0) {
 812                 r = -errno;
 813                 goto fail;
 814         }
 815
 816         /* Check whether this is a /proc, /sys or /dev file or char device */
 817         if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
 818                 r = -EEXIST;
 819                 goto fail;
 820         }
 821
 822         *_fd = fd;
 823         return 0;
 824
 825 fail:
 826         if (fd >= 0)
 827                 close_nointr_nofail(fd);
 828
 829         return r;
 830 }
 831
 832 static int mq_address_create(
 833                 const char *path,
 834                 mode_t mq_mode,
 835                 long maxmsg,
 836                 long msgsize,
 837                 int *_fd) {
 838
 839         int fd = -1, r = 0;
 840         struct stat st;
 841         mode_t old_mask;
 842         struct mq_attr _attr, *attr = NULL;
 843
 844         assert(path);
 845         assert(_fd);
 846
 847         if (maxmsg > 0 && msgsize > 0) {
 848                 zero(_attr);
 849                 _attr.mq_flags = O_NONBLOCK;
 850                 _attr.mq_maxmsg = maxmsg;
 851                 _attr.mq_msgsize = msgsize;
 852                 attr = &_attr;
 853         }
 854
 855         /* Enforce the right access mode for the mq */
 856         old_mask = umask(~ mq_mode);
 857
 858         /* Include the original umask in our mask */
 859         umask(~mq_mode | old_mask);
 860
 861         fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
 862         umask(old_mask);
 863
 864         if (fd < 0) {
 865                 r = -errno;
 866                 goto fail;
 867         }
 868
 869         if (fstat(fd, &st) < 0) {
 870                 r = -errno;
 871                 goto fail;
 872         }
 873
 874         if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
 875             st.st_uid != getuid() ||
 876             st.st_gid != getgid()) {
 877
 878                 r = -EEXIST;
 879                 goto fail;
 880         }
 881
 882         *_fd = fd;
 883         return 0;
 884
 885 fail:
 886         if (fd >= 0)
 887                 close_nointr_nofail(fd);
 888
 889         return r;
 890 }
 891
 892 static int socket_open_fds(Socket *s) {
 893         SocketPort *p;
 894         int r;
 895         char *label = NULL;
 896         bool know_label = false;
 897
 898         assert(s);
 899
 900         LIST_FOREACH(port, p, s->ports) {
 901
 902                 if (p->fd >= 0)
 903                         continue;
 904
 905                 if (p->type == SOCKET_SOCKET) {
 906
 907                         if (!know_label) {
 908
 909                                 if ((r = socket_instantiate_service(s)) < 0)
 910                                         return r;
 911
 912                                 if (UNIT_DEREF(s->service) &&
 913                                     SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
 914                                         r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
 915
 916                                         if (r < 0) {
 917                                                 if (r != -EPERM)
 918                                                         return r;
 919                                         }
 920                                 }
 921
 922                                 know_label = true;
 923                         }
 924
 925                         if ((r = socket_address_listen(
 926                                              &p->address,
 927                                              s->backlog,
 928                                              s->bind_ipv6_only,
 929                                              s->bind_to_device,
 930                                              s->free_bind,
 931                                              s->transparent,
 932                                              s->directory_mode,
 933                                              s->socket_mode,
 934                                              label,
 935                                              &p->fd)) < 0)
 936                                 goto rollback;
 937
 938                         socket_apply_socket_options(s, p->fd);
 939
 940                 } else  if (p->type == SOCKET_SPECIAL) {
 941
 942                         if ((r = special_address_create(
 943                                              p->path,
 944                                              &p->fd)) < 0)
 945                                 goto rollback;
 946
 947                 } else  if (p->type == SOCKET_FIFO) {
 948
 949                         if ((r = fifo_address_create(
 950                                              p->path,
 951                                              s->directory_mode,
 952                                              s->socket_mode,
 953                                              &p->fd)) < 0)
 954                                 goto rollback;
 955
 956                         socket_apply_fifo_options(s, p->fd);
 957                 } else if (p->type == SOCKET_MQUEUE) {
 958
 959                         if ((r = mq_address_create(
 960                                              p->path,
 961                                              s->socket_mode,
 962                                              s->mq_maxmsg,
 963                                              s->mq_msgsize,
 964                                              &p->fd)) < 0)
 965                                 goto rollback;
 966                 } else
 967                         assert_not_reached("Unknown port type");
 968         }
 969
 970         label_free(label);
 971         return 0;
 972
 973 rollback:
 974         socket_close_fds(s);
 975         label_free(label);
 976         return r;
 977 }
 978
 979 static void socket_unwatch_fds(Socket *s) {
 980         SocketPort *p;
 981
 982         assert(s);
 983
 984         LIST_FOREACH(port, p, s->ports) {
 985                 if (p->fd < 0)
 986                         continue;
 987
 988                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 989         }
 990 }
 991
 992 static int socket_watch_fds(Socket *s) {
 993         SocketPort *p;
 994         int r;
 995
 996         assert(s);
 997
 998         LIST_FOREACH(port, p, s->ports) {
 999                 if (p->fd < 0)
1000                         continue;
1001
1002                 p->fd_watch.socket_accept =
1003                         s->accept &&
1004                         p->type == SOCKET_SOCKET &&
1005                         socket_address_can_accept(&p->address);
1006
1007                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
1008                         goto fail;
1009         }
1010
1011         return 0;
1012
1013 fail:
1014         socket_unwatch_fds(s);
1015         return r;
1016 }
1017
1018 static void socket_set_state(Socket *s, SocketState state) {
1019         SocketState old_state;
1020         assert(s);
1021
1022         old_state = s->state;
1023         s->state = state;
1024
1025         if (state != SOCKET_START_PRE &&
1026             state != SOCKET_START_POST &&
1027             state != SOCKET_STOP_PRE &&
1028             state != SOCKET_STOP_PRE_SIGTERM &&
1029             state != SOCKET_STOP_PRE_SIGKILL &&
1030             state != SOCKET_STOP_POST &&
1031             state != SOCKET_FINAL_SIGTERM &&
1032             state != SOCKET_FINAL_SIGKILL) {
1033                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1034                 socket_unwatch_control_pid(s);
1035                 s->control_command = NULL;
1036                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1037         }
1038
1039         if (state != SOCKET_LISTENING)
1040                 socket_unwatch_fds(s);
1041
1042         if (state != SOCKET_START_POST &&
1043             state != SOCKET_LISTENING &&
1044             state != SOCKET_RUNNING &&
1045             state != SOCKET_STOP_PRE &&
1046             state != SOCKET_STOP_PRE_SIGTERM &&
1047             state != SOCKET_STOP_PRE_SIGKILL)
1048                 socket_close_fds(s);
1049
1050         if (state != old_state)
1051                 log_debug("%s changed %s -> %s",
1052                           s->meta.id,
1053                           socket_state_to_string(old_state),
1054                           socket_state_to_string(state));
1055
1056         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1057 }
1058
1059 static int socket_coldplug(Unit *u) {
1060         Socket *s = SOCKET(u);
1061         int r;
1062
1063         assert(s);
1064         assert(s->state == SOCKET_DEAD);
1065
1066         if (s->deserialized_state != s->state) {
1067
1068                 if (s->deserialized_state == SOCKET_START_PRE ||
1069                     s->deserialized_state == SOCKET_START_POST ||
1070                     s->deserialized_state == SOCKET_STOP_PRE ||
1071                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1072                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1073                     s->deserialized_state == SOCKET_STOP_POST ||
1074                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1075                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1076
1077                         if (s->control_pid <= 0)
1078                                 return -EBADMSG;
1079
1080                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1081                                 return r;
1082
1083                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1084                                 return r;
1085                 }
1086
1087                 if (s->deserialized_state == SOCKET_START_POST ||
1088                     s->deserialized_state == SOCKET_LISTENING ||
1089                     s->deserialized_state == SOCKET_RUNNING ||
1090                     s->deserialized_state == SOCKET_STOP_PRE ||
1091                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1092                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1093                         if ((r = socket_open_fds(s)) < 0)
1094                                 return r;
1095
1096                 if (s->deserialized_state == SOCKET_LISTENING)
1097                         if ((r = socket_watch_fds(s)) < 0)
1098                                 return r;
1099
1100                 socket_set_state(s, s->deserialized_state);
1101         }
1102
1103         return 0;
1104 }
1105
1106 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1107         pid_t pid;
1108         int r;
1109         char **argv;
1110
1111         assert(s);
1112         assert(c);
1113         assert(_pid);
1114
1115         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1116                 goto fail;
1117
1118         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1119                 r = -ENOMEM;
1120                 goto fail;
1121         }
1122
1123         r = exec_spawn(c,
1124                        argv,
1125                        &s->exec_context,
1126                        NULL, 0,
1127                        s->meta.manager->environment,
1128                        true,
1129                        true,
1130                        true,
1131                        s->meta.manager->confirm_spawn,
1132                        s->meta.cgroup_bondings,
1133                        s->meta.cgroup_attributes,
1134                        &pid);
1135
1136         strv_free(argv);
1137         if (r < 0)
1138                 goto fail;
1139
1140         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1141                 /* FIXME: we need to do something here */
1142                 goto fail;
1143
1144         *_pid = pid;
1145
1146         return 0;
1147
1148 fail:
1149         unit_unwatch_timer(UNIT(s), &s->timer_watch);
1150
1151         return r;
1152 }
1153
1154 static void socket_enter_dead(Socket *s, bool success) {
1155         assert(s);
1156
1157         if (!success)
1158                 s->failure = true;
1159
1160         socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
1161 }
1162
1163 static void socket_enter_signal(Socket *s, SocketState state, bool success);
1164
1165 static void socket_enter_stop_post(Socket *s, bool success) {
1166         int r;
1167         assert(s);
1168
1169         if (!success)
1170                 s->failure = true;
1171
1172         socket_unwatch_control_pid(s);
1173
1174         s->control_command_id = SOCKET_EXEC_STOP_POST;
1175
1176         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1177                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1178                         goto fail;
1179
1180                 socket_set_state(s, SOCKET_STOP_POST);
1181         } else
1182                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
1183
1184         return;
1185
1186 fail:
1187         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1188         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1189 }
1190
1191 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1192         int r;
1193         Set *pid_set = NULL;
1194         bool wait_for_exit = false;
1195
1196         assert(s);
1197
1198         if (!success)
1199                 s->failure = true;
1200
1201         if (s->exec_context.kill_mode != KILL_NONE) {
1202                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1203
1204                 if (s->control_pid > 0) {
1205                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1206
1207                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1208                         else
1209                                 wait_for_exit = true;
1210                 }
1211
1212                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1213
1214                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1215                                 r = -ENOMEM;
1216                                 goto fail;
1217                         }
1218
1219                         /* Exclude the control pid from being killed via the cgroup */
1220                         if (s->control_pid > 0)
1221                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1222                                         goto fail;
1223
1224                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1225                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1226                                         log_warning("Failed to kill control group: %s", strerror(-r));
1227                         } else if (r > 0)
1228                                 wait_for_exit = true;
1229
1230                         set_free(pid_set);
1231                         pid_set = NULL;
1232                 }
1233         }
1234
1235         if (wait_for_exit) {
1236                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1237                         goto fail;
1238
1239                 socket_set_state(s, state);
1240         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1241                 socket_enter_stop_post(s, true);
1242         else
1243                 socket_enter_dead(s, true);
1244
1245         return;
1246
1247 fail:
1248         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1249
1250         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1251                 socket_enter_stop_post(s, false);
1252         else
1253                 socket_enter_dead(s, false);
1254
1255         if (pid_set)
1256                 set_free(pid_set);
1257 }
1258
1259 static void socket_enter_stop_pre(Socket *s, bool success) {
1260         int r;
1261         assert(s);
1262
1263         if (!success)
1264                 s->failure = true;
1265
1266         socket_unwatch_control_pid(s);
1267
1268         s->control_command_id = SOCKET_EXEC_STOP_PRE;
1269
1270         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1271                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1272                         goto fail;
1273
1274                 socket_set_state(s, SOCKET_STOP_PRE);
1275         } else
1276                 socket_enter_stop_post(s, true);
1277
1278         return;
1279
1280 fail:
1281         log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
1282         socket_enter_stop_post(s, false);
1283 }
1284
1285 static void socket_enter_listening(Socket *s) {
1286         int r;
1287         assert(s);
1288
1289         if ((r = socket_watch_fds(s)) < 0) {
1290                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1291                 goto fail;
1292         }
1293
1294         socket_set_state(s, SOCKET_LISTENING);
1295         return;
1296
1297 fail:
1298         socket_enter_stop_pre(s, false);
1299 }
1300
1301 static void socket_enter_start_post(Socket *s) {
1302         int r;
1303         assert(s);
1304
1305         if ((r = socket_open_fds(s)) < 0) {
1306                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
1307                 goto fail;
1308         }
1309
1310         socket_unwatch_control_pid(s);
1311
1312         s->control_command_id = SOCKET_EXEC_START_POST;
1313
1314         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1315                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
1316                         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1317                         goto fail;
1318                 }
1319
1320                 socket_set_state(s, SOCKET_START_POST);
1321         } else
1322                 socket_enter_listening(s);
1323
1324         return;
1325
1326 fail:
1327         socket_enter_stop_pre(s, false);
1328 }
1329
1330 static void socket_enter_start_pre(Socket *s) {
1331         int r;
1332         assert(s);
1333
1334         socket_unwatch_control_pid(s);
1335
1336         s->control_command_id = SOCKET_EXEC_START_PRE;
1337
1338         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1339                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1340                         goto fail;
1341
1342                 socket_set_state(s, SOCKET_START_PRE);
1343         } else
1344                 socket_enter_start_post(s);
1345
1346         return;
1347
1348 fail:
1349         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1350         socket_enter_dead(s, false);
1351 }
1352
1353 static void socket_enter_running(Socket *s, int cfd) {
1354         int r;
1355         DBusError error;
1356
1357         assert(s);
1358         dbus_error_init(&error);
1359
1360         /* We don't take connections anymore if we are supposed to
1361          * shut down anyway */
1362         if (unit_pending_inactive(UNIT(s))) {
1363                 log_debug("Suppressing connection request on %s since unit stop is scheduled.", s->meta.id);
1364
1365                 if (cfd >= 0)
1366                         close_nointr_nofail(cfd);
1367                 else  {
1368                         /* Flush all sockets by closing and reopening them */
1369                         socket_close_fds(s);
1370
1371                         if ((r = socket_watch_fds(s)) < 0) {
1372                                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1373                                 socket_enter_stop_pre(s, false);
1374                         }
1375                 }
1376
1377                 return;
1378         }
1379
1380         if (cfd < 0) {
1381                 Iterator i;
1382                 Unit *u;
1383                 bool pending = false;
1384
1385                 /* If there's already a start pending don't bother to
1386                  * do anything */
1387                 SET_FOREACH(u, s->meta.dependencies[UNIT_TRIGGERS], i)
1388                         if (unit_pending_active(u)) {
1389                                 pending = true;
1390                                 break;
1391                         }
1392
1393                 if (!pending)
1394                         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1395                                 goto fail;
1396
1397                 socket_set_state(s, SOCKET_RUNNING);
1398         } else {
1399                 char *prefix, *instance = NULL, *name;
1400                 Service *service;
1401
1402                 if (s->n_connections >= s->max_connections) {
1403                         log_warning("Too many incoming connections (%u)", s->n_connections);
1404                         close_nointr_nofail(cfd);
1405                         return;
1406                 }
1407
1408                 if ((r = socket_instantiate_service(s)) < 0)
1409                         goto fail;
1410
1411                 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
1412                         goto fail;
1413
1414                 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1415                         free(instance);
1416                         r = -ENOMEM;
1417                         goto fail;
1418                 }
1419
1420                 name = unit_name_build(prefix, instance, ".service");
1421                 free(prefix);
1422                 free(instance);
1423
1424                 if (!name) {
1425                         r = -ENOMEM;
1426                         goto fail;
1427                 }
1428
1429                 if ((r = unit_add_name(UNIT_DEREF(s->service), name)) < 0) {
1430                         free(name);
1431                         goto fail;
1432                 }
1433
1434                 service = SERVICE(UNIT_DEREF(s->service));
1435                 unit_ref_unset(&s->service);
1436                 s->n_accepted ++;
1437
1438                 service->meta.no_gc = false;
1439
1440                 unit_choose_id(UNIT(service), name);
1441                 free(name);
1442
1443                 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
1444                         goto fail;
1445
1446                 cfd = -1;
1447                 s->n_connections ++;
1448
1449                 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
1450                         goto fail;
1451
1452                 /* Notify clients about changed counters */
1453                 unit_add_to_dbus_queue(UNIT(s));
1454         }
1455
1456         return;
1457
1458 fail:
1459         log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
1460         socket_enter_stop_pre(s, false);
1461
1462         if (cfd >= 0)
1463                 close_nointr_nofail(cfd);
1464
1465         dbus_error_free(&error);
1466 }
1467
1468 static void socket_run_next(Socket *s, bool success) {
1469         int r;
1470
1471         assert(s);
1472         assert(s->control_command);
1473         assert(s->control_command->command_next);
1474
1475         if (!success)
1476                 s->failure = true;
1477
1478         socket_unwatch_control_pid(s);
1479
1480         s->control_command = s->control_command->command_next;
1481
1482         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1483                 goto fail;
1484
1485         return;
1486
1487 fail:
1488         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1489
1490         if (s->state == SOCKET_START_POST)
1491                 socket_enter_stop_pre(s, false);
1492         else if (s->state == SOCKET_STOP_POST)
1493                 socket_enter_dead(s, false);
1494         else
1495                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1496 }
1497
1498 static int socket_start(Unit *u) {
1499         Socket *s = SOCKET(u);
1500
1501         assert(s);
1502
1503         /* We cannot fulfill this request right now, try again later
1504          * please! */
1505         if (s->state == SOCKET_STOP_PRE ||
1506             s->state == SOCKET_STOP_PRE_SIGKILL ||
1507             s->state == SOCKET_STOP_PRE_SIGTERM ||
1508             s->state == SOCKET_STOP_POST ||
1509             s->state == SOCKET_FINAL_SIGTERM ||
1510             s->state == SOCKET_FINAL_SIGKILL)
1511                 return -EAGAIN;
1512
1513         if (s->state == SOCKET_START_PRE ||
1514             s->state == SOCKET_START_POST)
1515                 return 0;
1516
1517         /* Cannot run this without the service being around */
1518         if (UNIT_DEREF(s->service)) {
1519                 Service *service;
1520
1521                 service = SERVICE(UNIT_DEREF(s->service));
1522
1523                 if (service->meta.load_state != UNIT_LOADED) {
1524                         log_error("Socket service %s not loaded, refusing.", service->meta.id);
1525                         return -ENOENT;
1526                 }
1527
1528                 /* If the service is already active we cannot start the
1529                  * socket */
1530                 if (service->state != SERVICE_DEAD &&
1531                     service->state != SERVICE_FAILED &&
1532                     service->state != SERVICE_AUTO_RESTART) {
1533                         log_error("Socket service %s already active, refusing.", service->meta.id);
1534                         return -EBUSY;
1535                 }
1536
1537 #ifdef HAVE_SYSV_COMPAT
1538                 if (service->sysv_path) {
1539                         log_error("Using SysV services for socket activation is not supported. Refusing.");
1540                         return -ENOENT;
1541                 }
1542 #endif
1543         }
1544
1545         assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1546
1547         s->failure = false;
1548         socket_enter_start_pre(s);
1549         return 0;
1550 }
1551
1552 static int socket_stop(Unit *u) {
1553         Socket *s = SOCKET(u);
1554
1555         assert(s);
1556
1557         /* Already on it */
1558         if (s->state == SOCKET_STOP_PRE ||
1559             s->state == SOCKET_STOP_PRE_SIGTERM ||
1560             s->state == SOCKET_STOP_PRE_SIGKILL ||
1561             s->state == SOCKET_STOP_POST ||
1562             s->state == SOCKET_FINAL_SIGTERM ||
1563             s->state == SOCKET_FINAL_SIGKILL)
1564                 return 0;
1565
1566         /* If there's already something running we go directly into
1567          * kill mode. */
1568         if (s->state == SOCKET_START_PRE ||
1569             s->state == SOCKET_START_POST) {
1570                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1571                 return -EAGAIN;
1572         }
1573
1574         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1575
1576         socket_enter_stop_pre(s, true);
1577         return 0;
1578 }
1579
1580 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1581         Socket *s = SOCKET(u);
1582         SocketPort *p;
1583         int r;
1584
1585         assert(u);
1586         assert(f);
1587         assert(fds);
1588
1589         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1590         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1591         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1592
1593         if (s->control_pid > 0)
1594                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1595
1596         if (s->control_command_id >= 0)
1597                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1598
1599         LIST_FOREACH(port, p, s->ports) {
1600                 int copy;
1601
1602                 if (p->fd < 0)
1603                         continue;
1604
1605                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1606                         return copy;
1607
1608                 if (p->type == SOCKET_SOCKET) {
1609                         char *t;
1610
1611                         if ((r = socket_address_print(&p->address, &t)) < 0)
1612                                 return r;
1613
1614                         if (socket_address_family(&p->address) == AF_NETLINK)
1615                                 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1616                         else
1617                                 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1618                         free(t);
1619                 } else if (p->type == SOCKET_SPECIAL)
1620                         unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1621                 else {
1622                         assert(p->type == SOCKET_FIFO);
1623                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1624                 }
1625         }
1626
1627         return 0;
1628 }
1629
1630 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1631         Socket *s = SOCKET(u);
1632
1633         assert(u);
1634         assert(key);
1635         assert(value);
1636         assert(fds);
1637
1638         if (streq(key, "state")) {
1639                 SocketState state;
1640
1641                 if ((state = socket_state_from_string(value)) < 0)
1642                         log_debug("Failed to parse state value %s", value);
1643                 else
1644                         s->deserialized_state = state;
1645         } else if (streq(key, "failure")) {
1646                 int b;
1647
1648                 if ((b = parse_boolean(value)) < 0)
1649                         log_debug("Failed to parse failure value %s", value);
1650                 else
1651                         s->failure = b || s->failure;
1652
1653         } else if (streq(key, "n-accepted")) {
1654                 unsigned k;
1655
1656                 if (safe_atou(value, &k) < 0)
1657                         log_debug("Failed to parse n-accepted value %s", value);
1658                 else
1659                         s->n_accepted += k;
1660         } else if (streq(key, "control-pid")) {
1661                 pid_t pid;
1662
1663                 if (parse_pid(value, &pid) < 0)
1664                         log_debug("Failed to parse control-pid value %s", value);
1665                 else
1666                         s->control_pid = pid;
1667         } else if (streq(key, "control-command")) {
1668                 SocketExecCommand id;
1669
1670                 if ((id = socket_exec_command_from_string(value)) < 0)
1671                         log_debug("Failed to parse exec-command value %s", value);
1672                 else {
1673                         s->control_command_id = id;
1674                         s->control_command = s->exec_command[id];
1675                 }
1676         } else if (streq(key, "fifo")) {
1677                 int fd, skip = 0;
1678                 SocketPort *p;
1679
1680                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1681                         log_debug("Failed to parse fifo value %s", value);
1682                 else {
1683
1684                         LIST_FOREACH(port, p, s->ports)
1685                                 if (p->type == SOCKET_FIFO &&
1686                                     streq_ptr(p->path, value+skip))
1687                                         break;
1688
1689                         if (p) {
1690                                 if (p->fd >= 0)
1691                                         close_nointr_nofail(p->fd);
1692                                 p->fd = fdset_remove(fds, fd);
1693                         }
1694                 }
1695
1696         } else if (streq(key, "special")) {
1697                 int fd, skip = 0;
1698                 SocketPort *p;
1699
1700                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1701                         log_debug("Failed to parse special value %s", value);
1702                 else {
1703
1704                         LIST_FOREACH(port, p, s->ports)
1705                                 if (p->type == SOCKET_SPECIAL &&
1706                                     streq_ptr(p->path, value+skip))
1707                                         break;
1708
1709                         if (p) {
1710                                 if (p->fd >= 0)
1711                                         close_nointr_nofail(p->fd);
1712                                 p->fd = fdset_remove(fds, fd);
1713                         }
1714                 }
1715
1716         } else if (streq(key, "socket")) {
1717                 int fd, type, skip = 0;
1718                 SocketPort *p;
1719
1720                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1721                         log_debug("Failed to parse socket value %s", value);
1722                 else {
1723
1724                         LIST_FOREACH(port, p, s->ports)
1725                                 if (socket_address_is(&p->address, value+skip, type))
1726                                         break;
1727
1728                         if (p) {
1729                                 if (p->fd >= 0)
1730                                         close_nointr_nofail(p->fd);
1731                                 p->fd = fdset_remove(fds, fd);
1732                         }
1733                 }
1734
1735         } else if (streq(key, "netlink")) {
1736                 int fd, skip = 0;
1737                 SocketPort *p;
1738
1739                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1740                         log_debug("Failed to parse socket value %s", value);
1741                 else {
1742
1743                         LIST_FOREACH(port, p, s->ports)
1744                                 if (socket_address_is_netlink(&p->address, value+skip))
1745                                         break;
1746
1747                         if (p) {
1748                                 if (p->fd >= 0)
1749                                         close_nointr_nofail(p->fd);
1750                                 p->fd = fdset_remove(fds, fd);
1751                         }
1752                 }
1753
1754         } else
1755                 log_debug("Unknown serialization key '%s'", key);
1756
1757         return 0;
1758 }
1759
1760 static UnitActiveState socket_active_state(Unit *u) {
1761         assert(u);
1762
1763         return state_translation_table[SOCKET(u)->state];
1764 }
1765
1766 static const char *socket_sub_state_to_string(Unit *u) {
1767         assert(u);
1768
1769         return socket_state_to_string(SOCKET(u)->state);
1770 }
1771
1772 static bool socket_check_gc(Unit *u) {
1773         Socket *s = SOCKET(u);
1774
1775         assert(u);
1776
1777         return s->n_connections > 0;
1778 }
1779
1780 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1781         Socket *s = SOCKET(u);
1782         int cfd = -1;
1783
1784         assert(s);
1785         assert(fd >= 0);
1786
1787         if (s->state != SOCKET_LISTENING)
1788                 return;
1789
1790         log_debug("Incoming traffic on %s", u->meta.id);
1791
1792         if (events != EPOLLIN) {
1793
1794                 if (events & EPOLLHUP)
1795                         log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->meta.id);
1796                 else
1797                         log_error("%s: Got unexpected poll event (0x%x) on socket.", u->meta.id, events);
1798
1799                 goto fail;
1800         }
1801
1802         if (w->socket_accept) {
1803                 for (;;) {
1804
1805                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1806
1807                                 if (errno == EINTR)
1808                                         continue;
1809
1810                                 log_error("Failed to accept socket: %m");
1811                                 goto fail;
1812                         }
1813
1814                         break;
1815                 }
1816
1817                 socket_apply_socket_options(s, cfd);
1818         }
1819
1820         socket_enter_running(s, cfd);
1821         return;
1822
1823 fail:
1824         socket_enter_stop_pre(s, false);
1825 }
1826
1827 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1828         Socket *s = SOCKET(u);
1829         bool success;
1830
1831         assert(s);
1832         assert(pid >= 0);
1833
1834         if (pid != s->control_pid)
1835                 return;
1836
1837         s->control_pid = 0;
1838
1839         success = is_clean_exit(code, status);
1840
1841         if (s->control_command) {
1842                 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1843
1844                 if (s->control_command->ignore)
1845                         success = true;
1846         }
1847
1848         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1849                  "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1850         s->failure = s->failure || !success;
1851
1852         if (s->control_command && s->control_command->command_next && success) {
1853                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1854                 socket_run_next(s, success);
1855         } else {
1856                 s->control_command = NULL;
1857                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1858
1859                 /* No further commands for this step, so let's figure
1860                  * out what to do next */
1861
1862                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1863
1864                 switch (s->state) {
1865
1866                 case SOCKET_START_PRE:
1867                         if (success)
1868                                 socket_enter_start_post(s);
1869                         else
1870                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1871                         break;
1872
1873                 case SOCKET_START_POST:
1874                         if (success)
1875                                 socket_enter_listening(s);
1876                         else
1877                                 socket_enter_stop_pre(s, false);
1878                         break;
1879
1880                 case SOCKET_STOP_PRE:
1881                 case SOCKET_STOP_PRE_SIGTERM:
1882                 case SOCKET_STOP_PRE_SIGKILL:
1883                         socket_enter_stop_post(s, success);
1884                         break;
1885
1886                 case SOCKET_STOP_POST:
1887                 case SOCKET_FINAL_SIGTERM:
1888                 case SOCKET_FINAL_SIGKILL:
1889                         socket_enter_dead(s, success);
1890                         break;
1891
1892                 default:
1893                         assert_not_reached("Uh, control process died at wrong time.");
1894                 }
1895         }
1896
1897         /* Notify clients about changed exit status */
1898         unit_add_to_dbus_queue(u);
1899 }
1900
1901 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1902         Socket *s = SOCKET(u);
1903
1904         assert(s);
1905         assert(elapsed == 1);
1906         assert(w == &s->timer_watch);
1907
1908         switch (s->state) {
1909
1910         case SOCKET_START_PRE:
1911                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1912                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1913                 break;
1914
1915         case SOCKET_START_POST:
1916                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1917                 socket_enter_stop_pre(s, false);
1918                 break;
1919
1920         case SOCKET_STOP_PRE:
1921                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1922                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1923                 break;
1924
1925         case SOCKET_STOP_PRE_SIGTERM:
1926                 if (s->exec_context.send_sigkill) {
1927                         log_warning("%s stopping timed out. Killing.", u->meta.id);
1928                         socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1929                 } else {
1930                         log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1931                         socket_enter_stop_post(s, false);
1932                 }
1933                 break;
1934
1935         case SOCKET_STOP_PRE_SIGKILL:
1936                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1937                 socket_enter_stop_post(s, false);
1938                 break;
1939
1940         case SOCKET_STOP_POST:
1941                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1942                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1943                 break;
1944
1945         case SOCKET_FINAL_SIGTERM:
1946                 if (s->exec_context.send_sigkill) {
1947                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1948                         socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1949                 } else {
1950                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
1951                         socket_enter_dead(s, false);
1952                 }
1953                 break;
1954
1955         case SOCKET_FINAL_SIGKILL:
1956                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
1957                 socket_enter_dead(s, false);
1958                 break;
1959
1960         default:
1961                 assert_not_reached("Timeout at wrong time.");
1962         }
1963 }
1964
1965 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1966         int *rfds;
1967         unsigned rn_fds, k;
1968         SocketPort *p;
1969
1970         assert(s);
1971         assert(fds);
1972         assert(n_fds);
1973
1974         /* Called from the service code for requesting our fds */
1975
1976         rn_fds = 0;
1977         LIST_FOREACH(port, p, s->ports)
1978                 if (p->fd >= 0)
1979                         rn_fds++;
1980
1981         if (rn_fds <= 0) {
1982                 *fds = NULL;
1983                 *n_fds = 0;
1984                 return 0;
1985         }
1986
1987         if (!(rfds = new(int, rn_fds)))
1988                 return -ENOMEM;
1989
1990         k = 0;
1991         LIST_FOREACH(port, p, s->ports)
1992                 if (p->fd >= 0)
1993                         rfds[k++] = p->fd;
1994
1995         assert(k == rn_fds);
1996
1997         *fds = rfds;
1998         *n_fds = rn_fds;
1999
2000         return 0;
2001 }
2002
2003 void socket_notify_service_dead(Socket *s) {
2004         assert(s);
2005
2006         /* The service is dead. Dang!
2007          *
2008          * This is strictly for one-instance-for-all-connections
2009          * services. */
2010
2011         if (s->state == SOCKET_RUNNING) {
2012                 log_debug("%s got notified about service death.", s->meta.id);
2013                 socket_enter_listening(s);
2014         }
2015 }
2016
2017 void socket_connection_unref(Socket *s) {
2018         assert(s);
2019
2020         /* The service is dead. Yay!
2021          *
2022          * This is strictly for one-instance-per-connection
2023          * services. */
2024
2025         assert(s->n_connections > 0);
2026         s->n_connections--;
2027
2028         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
2029 }
2030
2031 static void socket_reset_failed(Unit *u) {
2032         Socket *s = SOCKET(u);
2033
2034         assert(s);
2035
2036         if (s->state == SOCKET_FAILED)
2037                 socket_set_state(s, SOCKET_DEAD);
2038
2039         s->failure = false;
2040 }
2041
2042 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2043         Socket *s = SOCKET(u);
2044         int r = 0;
2045         Set *pid_set = NULL;
2046
2047         assert(s);
2048
2049         if (who == KILL_MAIN) {
2050                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2051                 return -ESRCH;
2052         }
2053
2054         if (s->control_pid <= 0 && who == KILL_CONTROL) {
2055                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2056                 return -ESRCH;
2057         }
2058
2059         if (who == KILL_CONTROL || who == KILL_ALL)
2060                 if (s->control_pid > 0)
2061                         if (kill(s->control_pid, signo) < 0)
2062                                 r = -errno;
2063
2064         if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
2065                 int q;
2066
2067                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2068                         return -ENOMEM;
2069
2070                 /* Exclude the control pid from being killed via the cgroup */
2071                 if (s->control_pid > 0)
2072                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2073                                 r = q;
2074                                 goto finish;
2075                         }
2076
2077                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
2078                         if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
2079                                 r = q;
2080         }
2081
2082 finish:
2083         if (pid_set)
2084                 set_free(pid_set);
2085
2086         return r;
2087 }
2088
2089 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2090         [SOCKET_DEAD] = "dead",
2091         [SOCKET_START_PRE] = "start-pre",
2092         [SOCKET_START_POST] = "start-post",
2093         [SOCKET_LISTENING] = "listening",
2094         [SOCKET_RUNNING] = "running",
2095         [SOCKET_STOP_PRE] = "stop-pre",
2096         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2097         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2098         [SOCKET_STOP_POST] = "stop-post",
2099         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2100         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2101         [SOCKET_FAILED] = "failed"
2102 };
2103
2104 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2105
2106 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2107         [SOCKET_EXEC_START_PRE] = "StartPre",
2108         [SOCKET_EXEC_START_POST] = "StartPost",
2109         [SOCKET_EXEC_STOP_PRE] = "StopPre",
2110         [SOCKET_EXEC_STOP_POST] = "StopPost"
2111 };
2112
2113 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2114
2115 const UnitVTable socket_vtable = {
2116         .suffix = ".socket",
2117         .sections =
2118                 "Unit\0"
2119                 "Socket\0"
2120                 "Install\0",
2121
2122         .init = socket_init,
2123         .done = socket_done,
2124         .load = socket_load,
2125
2126         .kill = socket_kill,
2127
2128         .coldplug = socket_coldplug,
2129
2130         .dump = socket_dump,
2131
2132         .start = socket_start,
2133         .stop = socket_stop,
2134
2135         .serialize = socket_serialize,
2136         .deserialize_item = socket_deserialize_item,
2137
2138         .active_state = socket_active_state,
2139         .sub_state_to_string = socket_sub_state_to_string,
2140
2141         .check_gc = socket_check_gc,
2142
2143         .fd_event = socket_fd_event,
2144         .sigchld_event = socket_sigchld_event,
2145         .timer_event = socket_timer_event,
2146
2147         .reset_failed = socket_reset_failed,
2148
2149         .bus_interface = "org.freedesktop.systemd1.Socket",
2150         .bus_message_handler = bus_socket_message_handler,
2151         .bus_invalidating_properties =  bus_socket_invalidating_properties
2152 };