src/socket.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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
  31 #include "unit.h"
  32 #include "socket.h"
  33 #include "log.h"
  34 #include "load-dropin.h"
  35 #include "load-fragment.h"
  36 #include "strv.h"
  37 #include "unit-name.h"
  38 #include "dbus-socket.h"
  39 #include "tcpwrap.h"
  40
  41 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  42         [SOCKET_DEAD] = UNIT_INACTIVE,
  43         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  44         [SOCKET_START_POST] = UNIT_ACTIVATING,
  45         [SOCKET_LISTENING] = UNIT_ACTIVE,
  46         [SOCKET_RUNNING] = UNIT_ACTIVE,
  47         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  48         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  49         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  50         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  51         [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  52         [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  53         [SOCKET_MAINTENANCE] = UNIT_INACTIVE,
  54 };
  55
  56 static void socket_init(Unit *u) {
  57         Socket *s = SOCKET(u);
  58
  59         assert(u);
  60         assert(u->meta.load_state == UNIT_STUB);
  61
  62         s->backlog = SOMAXCONN;
  63         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  64         s->directory_mode = 0755;
  65         s->socket_mode = 0666;
  66
  67         exec_context_init(&s->exec_context);
  68
  69         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  70 }
  71
  72 static void socket_unwatch_control_pid(Socket *s) {
  73         assert(s);
  74
  75         if (s->control_pid <= 0)
  76                 return;
  77
  78         unit_unwatch_pid(UNIT(s), s->control_pid);
  79         s->control_pid = 0;
  80 }
  81
  82 static void socket_done(Unit *u) {
  83         Socket *s = SOCKET(u);
  84         SocketPort *p;
  85
  86         assert(s);
  87
  88         while ((p = s->ports)) {
  89                 LIST_REMOVE(SocketPort, port, s->ports, p);
  90
  91                 if (p->fd >= 0) {
  92                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
  93                         close_nointr_nofail(p->fd);
  94                 }
  95
  96                 free(p->path);
  97                 free(p);
  98         }
  99
 100         exec_context_done(&s->exec_context);
 101         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 102         s->control_command = NULL;
 103
 104         socket_unwatch_control_pid(s);
 105
 106         s->service = NULL;
 107
 108         free(s->bind_to_device);
 109         s->bind_to_device = NULL;
 110
 111         free(s->tcpwrap_name);
 112         s->tcpwrap_name = NULL;
 113
 114         unit_unwatch_timer(u, &s->timer_watch);
 115 }
 116
 117 static bool have_non_accept_socket(Socket *s) {
 118         SocketPort *p;
 119
 120         assert(s);
 121
 122         if (!s->accept)
 123                 return true;
 124
 125         LIST_FOREACH(port, p, s->ports) {
 126
 127                 if (p->type != SOCKET_SOCKET)
 128                         return true;
 129
 130                 if (!socket_address_can_accept(&p->address))
 131                         return true;
 132         }
 133
 134         return false;
 135 }
 136
 137 static int socket_verify(Socket *s) {
 138         assert(s);
 139
 140         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 141                 return 0;
 142
 143         if (!s->ports) {
 144                 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
 145                 return -EINVAL;
 146         }
 147
 148         return 0;
 149 }
 150
 151 static bool socket_needs_mount(Socket *s, const char *prefix) {
 152         SocketPort *p;
 153
 154         assert(s);
 155
 156         LIST_FOREACH(port, p, s->ports) {
 157
 158                 if (p->type == SOCKET_SOCKET) {
 159                         if (socket_address_needs_mount(&p->address, prefix))
 160                                 return true;
 161                 } else {
 162                         assert(p->type == SOCKET_FIFO);
 163                         if (path_startswith(p->path, prefix))
 164                                 return true;
 165                 }
 166         }
 167
 168         return false;
 169 }
 170
 171 int socket_add_one_mount_link(Socket *s, Mount *m) {
 172         int r;
 173
 174         assert(s);
 175         assert(m);
 176
 177         if (s->meta.load_state != UNIT_LOADED ||
 178             m->meta.load_state != UNIT_LOADED)
 179                 return 0;
 180
 181         if (!socket_needs_mount(s, m->where))
 182                 return 0;
 183
 184         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
 185                 return r;
 186
 187         if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
 188                 return r;
 189
 190         return 0;
 191 }
 192
 193 static int socket_add_mount_links(Socket *s) {
 194         Meta *other;
 195         int r;
 196
 197         assert(s);
 198
 199         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
 200                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 201                         return r;
 202
 203         return 0;
 204 }
 205
 206 static int socket_add_device_link(Socket *s) {
 207         char *t;
 208         int r;
 209
 210         assert(s);
 211
 212         if (!s->bind_to_device)
 213                 return 0;
 214
 215         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 216                 return -ENOMEM;
 217
 218         r = unit_add_node_link(UNIT(s), t, false);
 219         free(t);
 220
 221         return r;
 222 }
 223
 224 static int socket_load(Unit *u) {
 225         Socket *s = SOCKET(u);
 226         int r;
 227
 228         assert(u);
 229         assert(u->meta.load_state == UNIT_STUB);
 230
 231         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 232                 return r;
 233
 234         /* This is a new unit? Then let's add in some extras */
 235         if (u->meta.load_state == UNIT_LOADED) {
 236
 237                 if (have_non_accept_socket(s)) {
 238                         if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
 239                                 return r;
 240
 241                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
 242                                 return r;
 243                 }
 244
 245                 if ((r = socket_add_mount_links(s)) < 0)
 246                         return r;
 247
 248                 if ((r = socket_add_device_link(s)) < 0)
 249                         return r;
 250
 251                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 252                         return r;
 253
 254                 if ((r = unit_add_default_cgroup(u)) < 0)
 255                         return r;
 256         }
 257
 258         return socket_verify(s);
 259 }
 260
 261 static const char* listen_lookup(int type) {
 262
 263         if (type == SOCK_STREAM)
 264                 return "ListenStream";
 265         else if (type == SOCK_DGRAM)
 266                 return "ListenDatagram";
 267         else if (type == SOCK_SEQPACKET)
 268                 return "ListenSequentialPacket";
 269
 270         assert_not_reached("Unknown socket type");
 271         return NULL;
 272 }
 273
 274 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 275
 276         SocketExecCommand c;
 277         Socket *s = SOCKET(u);
 278         SocketPort *p;
 279         const char *prefix2;
 280         char *p2;
 281
 282         assert(s);
 283         assert(f);
 284
 285         p2 = strappend(prefix, "\t");
 286         prefix2 = p2 ? p2 : prefix;
 287
 288         fprintf(f,
 289                 "%sSocket State: %s\n"
 290                 "%sBindIPv6Only: %s\n"
 291                 "%sBacklog: %u\n"
 292                 "%sKillMode: %s\n"
 293                 "%sSocketMode: %04o\n"
 294                 "%sDirectoryMode: %04o\n",
 295                 prefix, socket_state_to_string(s->state),
 296                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 297                 prefix, s->backlog,
 298                 prefix, kill_mode_to_string(s->kill_mode),
 299                 prefix, s->socket_mode,
 300                 prefix, s->directory_mode);
 301
 302         if (s->control_pid > 0)
 303                 fprintf(f,
 304                         "%sControl PID: %llu\n",
 305                         prefix, (unsigned long long) s->control_pid);
 306
 307         if (s->bind_to_device)
 308                 fprintf(f,
 309                         "%sBindToDevice: %s\n",
 310                         prefix, s->bind_to_device);
 311
 312         if (s->tcpwrap_name)
 313                 fprintf(f,
 314                         "%sTCPWrapName: %s\n",
 315                         prefix, s->tcpwrap_name);
 316
 317         if (s->accept)
 318                 fprintf(f,
 319                         "%sAccepted: %u\n",
 320                         prefix, s->n_accepted);
 321
 322         LIST_FOREACH(port, p, s->ports) {
 323
 324                 if (p->type == SOCKET_SOCKET) {
 325                         const char *t;
 326                         int r;
 327                         char *k;
 328
 329                         if ((r = socket_address_print(&p->address, &k)) < 0)
 330                                 t = strerror(-r);
 331                         else
 332                                 t = k;
 333
 334                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 335                         free(k);
 336                 } else
 337                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 338         }
 339
 340         exec_context_dump(&s->exec_context, f, prefix);
 341
 342         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 343                 if (!s->exec_command[c])
 344                         continue;
 345
 346                 fprintf(f, "%s-> %s:\n",
 347                         prefix, socket_exec_command_to_string(c));
 348
 349                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 350         }
 351
 352         free(p2);
 353 }
 354
 355 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 356         socklen_t l;
 357         char *r;
 358         union {
 359                 struct sockaddr sa;
 360                 struct sockaddr_un un;
 361                 struct sockaddr_in in;
 362                 struct sockaddr_in6 in6;
 363                 struct sockaddr_storage storage;
 364         } local, remote;
 365
 366         assert(fd >= 0);
 367         assert(instance);
 368
 369         l = sizeof(local);
 370         if (getsockname(fd, &local.sa, &l) < 0)
 371                 return -errno;
 372
 373         l = sizeof(remote);
 374         if (getpeername(fd, &remote.sa, &l) < 0)
 375                 return -errno;
 376
 377         switch (local.sa.sa_family) {
 378
 379         case AF_INET: {
 380                 uint32_t
 381                         a = ntohl(local.in.sin_addr.s_addr),
 382                         b = ntohl(remote.in.sin_addr.s_addr);
 383
 384                 if (asprintf(&r,
 385                              "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 386                              nr,
 387                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 388                              ntohs(local.in.sin_port),
 389                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 390                              ntohs(remote.in.sin_port)) < 0)
 391                         return -ENOMEM;
 392
 393                 break;
 394         }
 395
 396         case AF_INET6: {
 397                 static const char ipv4_prefix[] = {
 398                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 399                 };
 400
 401                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 402                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 403                         const uint8_t
 404                                 *a = local.in6.sin6_addr.s6_addr+12,
 405                                 *b = remote.in6.sin6_addr.s6_addr+12;
 406
 407                         if (asprintf(&r,
 408                                      "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 409                                      nr,
 410                                      a[0], a[1], a[2], a[3],
 411                                      ntohs(local.in6.sin6_port),
 412                                      b[0], b[1], b[2], b[3],
 413                                      ntohs(remote.in6.sin6_port)) < 0)
 414                                 return -ENOMEM;
 415                 } else {
 416                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 417
 418                         if (asprintf(&r,
 419                                      "%u-%s:%u-%s:%u",
 420                                      nr,
 421                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 422                                      ntohs(local.in6.sin6_port),
 423                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 424                                      ntohs(remote.in6.sin6_port)) < 0)
 425                                 return -ENOMEM;
 426                 }
 427
 428                 break;
 429         }
 430
 431         case AF_UNIX: {
 432                 struct ucred ucred;
 433
 434                 l = sizeof(ucred);
 435                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 436                         return -errno;
 437
 438                 if (asprintf(&r,
 439                              "%u-%llu-%llu",
 440                              nr,
 441                              (unsigned long long) ucred.pid,
 442                              (unsigned long long) ucred.uid) < 0)
 443                         return -ENOMEM;
 444
 445                 break;
 446         }
 447
 448         default:
 449                 assert_not_reached("Unhandled socket type.");
 450         }
 451
 452         *instance = r;
 453         return 0;
 454 }
 455
 456 static void socket_close_fds(Socket *s) {
 457         SocketPort *p;
 458
 459         assert(s);
 460
 461         LIST_FOREACH(port, p, s->ports) {
 462                 if (p->fd < 0)
 463                         continue;
 464
 465                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 466                 close_nointr_nofail(p->fd);
 467
 468                 /* One little note: we should never delete any sockets
 469                  * in the file system here! After all some other
 470                  * process we spawned might still have a reference of
 471                  * this fd and wants to continue to use it. Therefore
 472                  * we delete sockets in the file system before we
 473                  * create a new one, not after we stopped using
 474                  * one! */
 475
 476                 p->fd = -1;
 477         }
 478 }
 479
 480 static int socket_open_fds(Socket *s) {
 481         SocketPort *p;
 482         int r;
 483
 484         assert(s);
 485
 486         LIST_FOREACH(port, p, s->ports) {
 487
 488                 if (p->fd >= 0)
 489                         continue;
 490
 491                 if (p->type == SOCKET_SOCKET) {
 492
 493                         if ((r = socket_address_listen(
 494                                              &p->address,
 495                                              s->backlog,
 496                                              s->bind_ipv6_only,
 497                                              s->bind_to_device,
 498                                              s->directory_mode,
 499                                              s->socket_mode,
 500                                              &p->fd)) < 0)
 501                                 goto rollback;
 502
 503                 } else {
 504                         struct stat st;
 505                         assert(p->type == SOCKET_FIFO);
 506
 507                         mkdir_parents(p->path, s->directory_mode);
 508
 509                         if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
 510                                 r = -errno;
 511                                 goto rollback;
 512                         }
 513
 514                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 515                                 r = -errno;
 516                                 goto rollback;
 517                         }
 518
 519                         if (fstat(p->fd, &st) < 0) {
 520                                 r = -errno;
 521                                 goto rollback;
 522                         }
 523
 524                         /* FIXME verify user, access mode */
 525
 526                         if (!S_ISFIFO(st.st_mode)) {
 527                                 r = -EEXIST;
 528                                 goto rollback;
 529                         }
 530                 }
 531         }
 532
 533         return 0;
 534
 535 rollback:
 536         socket_close_fds(s);
 537         return r;
 538 }
 539
 540 static void socket_unwatch_fds(Socket *s) {
 541         SocketPort *p;
 542
 543         assert(s);
 544
 545         LIST_FOREACH(port, p, s->ports) {
 546                 if (p->fd < 0)
 547                         continue;
 548
 549                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 550         }
 551 }
 552
 553 static int socket_watch_fds(Socket *s) {
 554         SocketPort *p;
 555         int r;
 556
 557         assert(s);
 558
 559         LIST_FOREACH(port, p, s->ports) {
 560                 if (p->fd < 0)
 561                         continue;
 562
 563                 p->fd_watch.socket_accept =
 564                         s->accept &&
 565                         p->type == SOCKET_SOCKET &&
 566                         socket_address_can_accept(&p->address);
 567
 568                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 569                         goto fail;
 570         }
 571
 572         return 0;
 573
 574 fail:
 575         socket_unwatch_fds(s);
 576         return r;
 577 }
 578
 579 static void socket_set_state(Socket *s, SocketState state) {
 580         SocketState old_state;
 581         assert(s);
 582
 583         old_state = s->state;
 584         s->state = state;
 585
 586         if (state != SOCKET_START_PRE &&
 587             state != SOCKET_START_POST &&
 588             state != SOCKET_STOP_PRE &&
 589             state != SOCKET_STOP_PRE_SIGTERM &&
 590             state != SOCKET_STOP_PRE_SIGKILL &&
 591             state != SOCKET_STOP_POST &&
 592             state != SOCKET_FINAL_SIGTERM &&
 593             state != SOCKET_FINAL_SIGKILL) {
 594                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 595                 socket_unwatch_control_pid(s);
 596                 s->control_command = NULL;
 597                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
 598         }
 599
 600         if (state != SOCKET_LISTENING)
 601                 socket_unwatch_fds(s);
 602
 603         if (state != SOCKET_START_POST &&
 604             state != SOCKET_LISTENING &&
 605             state != SOCKET_RUNNING &&
 606             state != SOCKET_STOP_PRE &&
 607             state != SOCKET_STOP_PRE_SIGTERM &&
 608             state != SOCKET_STOP_PRE_SIGKILL)
 609                 socket_close_fds(s);
 610
 611         if (state != old_state)
 612                 log_debug("%s changed %s -> %s",
 613                           s->meta.id,
 614                           socket_state_to_string(old_state),
 615                           socket_state_to_string(state));
 616
 617         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 618 }
 619
 620 static int socket_coldplug(Unit *u) {
 621         Socket *s = SOCKET(u);
 622         int r;
 623
 624         assert(s);
 625         assert(s->state == SOCKET_DEAD);
 626
 627         if (s->deserialized_state != s->state) {
 628
 629                 if (s->deserialized_state == SOCKET_START_PRE ||
 630                     s->deserialized_state == SOCKET_START_POST ||
 631                     s->deserialized_state == SOCKET_STOP_PRE ||
 632                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 633                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
 634                     s->deserialized_state == SOCKET_STOP_POST ||
 635                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
 636                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
 637
 638                         if (s->control_pid <= 0)
 639                                 return -EBADMSG;
 640
 641                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
 642                                 return r;
 643
 644                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 645                                 return r;
 646                 }
 647
 648                 if (s->deserialized_state == SOCKET_START_POST ||
 649                     s->deserialized_state == SOCKET_LISTENING ||
 650                     s->deserialized_state == SOCKET_RUNNING ||
 651                     s->deserialized_state == SOCKET_STOP_PRE ||
 652                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 653                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
 654                         if ((r = socket_open_fds(s)) < 0)
 655                                 return r;
 656
 657                 if (s->deserialized_state == SOCKET_LISTENING)
 658                         if ((r = socket_watch_fds(s)) < 0)
 659                                 return r;
 660
 661                 socket_set_state(s, s->deserialized_state);
 662         }
 663
 664         return 0;
 665 }
 666
 667 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
 668         pid_t pid;
 669         int r;
 670         char **argv;
 671
 672         assert(s);
 673         assert(c);
 674         assert(_pid);
 675
 676         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 677                 goto fail;
 678
 679         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
 680                 r = -ENOMEM;
 681                 goto fail;
 682         }
 683
 684         r = exec_spawn(c,
 685                        argv,
 686                        &s->exec_context,
 687                        NULL, 0,
 688                        s->meta.manager->environment,
 689                        true,
 690                        true,
 691                        UNIT(s)->meta.manager->confirm_spawn,
 692                        UNIT(s)->meta.cgroup_bondings,
 693                        &pid);
 694
 695         strv_free(argv);
 696         if (r < 0)
 697                 goto fail;
 698
 699         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 700                 /* FIXME: we need to do something here */
 701                 goto fail;
 702
 703         *_pid = pid;
 704
 705         return 0;
 706
 707 fail:
 708         unit_unwatch_timer(UNIT(s), &s->timer_watch);
 709
 710         return r;
 711 }
 712
 713 static void socket_enter_dead(Socket *s, bool success) {
 714         assert(s);
 715
 716         if (!success)
 717                 s->failure = true;
 718
 719         socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
 720 }
 721
 722 static void socket_enter_signal(Socket *s, SocketState state, bool success);
 723
 724 static void socket_enter_stop_post(Socket *s, bool success) {
 725         int r;
 726         assert(s);
 727
 728         if (!success)
 729                 s->failure = true;
 730
 731         socket_unwatch_control_pid(s);
 732
 733         s->control_command_id = SOCKET_EXEC_STOP_POST;
 734
 735         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 736                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 737                         goto fail;
 738
 739                 socket_set_state(s, SOCKET_STOP_POST);
 740         } else
 741                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
 742
 743         return;
 744
 745 fail:
 746         log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
 747         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
 748 }
 749
 750 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 751         int r;
 752         bool sent = false;
 753
 754         assert(s);
 755
 756         if (!success)
 757                 s->failure = true;
 758
 759         if (s->kill_mode != KILL_NONE) {
 760                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
 761
 762                 if (s->kill_mode == KILL_CONTROL_GROUP) {
 763
 764                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
 765                                 if (r != -EAGAIN && r != -ESRCH)
 766                                         goto fail;
 767                         } else
 768                                 sent = true;
 769                 }
 770
 771                 if (!sent && s->control_pid > 0)
 772                         if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
 773                                 r = -errno;
 774                                 goto fail;
 775                         }
 776         }
 777
 778         if (sent && s->control_pid > 0) {
 779                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 780                         goto fail;
 781
 782                 socket_set_state(s, state);
 783         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 784                 socket_enter_stop_post(s, true);
 785         else
 786                 socket_enter_dead(s, true);
 787
 788         return;
 789
 790 fail:
 791         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
 792
 793         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 794                 socket_enter_stop_post(s, false);
 795         else
 796                 socket_enter_dead(s, false);
 797 }
 798
 799 static void socket_enter_stop_pre(Socket *s, bool success) {
 800         int r;
 801         assert(s);
 802
 803         if (!success)
 804                 s->failure = true;
 805
 806         socket_unwatch_control_pid(s);
 807
 808         s->control_command_id = SOCKET_EXEC_STOP_PRE;
 809
 810         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 811                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 812                         goto fail;
 813
 814                 socket_set_state(s, SOCKET_STOP_PRE);
 815         } else
 816                 socket_enter_stop_post(s, true);
 817
 818         return;
 819
 820 fail:
 821         log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
 822         socket_enter_stop_post(s, false);
 823 }
 824
 825 static void socket_enter_listening(Socket *s) {
 826         int r;
 827         assert(s);
 828
 829         if ((r = socket_watch_fds(s)) < 0) {
 830                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
 831                 goto fail;
 832         }
 833
 834         socket_set_state(s, SOCKET_LISTENING);
 835         return;
 836
 837 fail:
 838         socket_enter_stop_pre(s, false);
 839 }
 840
 841 static void socket_enter_start_post(Socket *s) {
 842         int r;
 843         assert(s);
 844
 845         if ((r = socket_open_fds(s)) < 0) {
 846                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
 847                 goto fail;
 848         }
 849
 850         socket_unwatch_control_pid(s);
 851
 852         s->control_command_id = SOCKET_EXEC_START_POST;
 853
 854         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 855                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
 856                         log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
 857                         goto fail;
 858                 }
 859
 860                 socket_set_state(s, SOCKET_START_POST);
 861         } else
 862                 socket_enter_listening(s);
 863
 864         return;
 865
 866 fail:
 867         socket_enter_stop_pre(s, false);
 868 }
 869
 870 static void socket_enter_start_pre(Socket *s) {
 871         int r;
 872         assert(s);
 873
 874         socket_unwatch_control_pid(s);
 875
 876         s->control_command_id = SOCKET_EXEC_START_PRE;
 877
 878         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
 879                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 880                         goto fail;
 881
 882                 socket_set_state(s, SOCKET_START_PRE);
 883         } else
 884                 socket_enter_start_post(s);
 885
 886         return;
 887
 888 fail:
 889         log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
 890         socket_enter_dead(s, false);
 891 }
 892
 893 static void socket_enter_running(Socket *s, int cfd) {
 894         int r;
 895
 896         assert(s);
 897
 898         if (cfd < 0) {
 899                 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
 900                         goto fail;
 901
 902                 socket_set_state(s, SOCKET_RUNNING);
 903         } else {
 904                 Unit *u;
 905                 char *prefix, *instance, *name;
 906
 907                 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
 908                         goto fail;
 909
 910                 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
 911                         free(instance);
 912                         r = -ENOMEM;
 913                         goto fail;
 914                 }
 915
 916                 name = unit_name_build(prefix, instance, ".service");
 917                 free(prefix);
 918                 free(instance);
 919
 920                 if (!name) {
 921                         r = -ENOMEM;
 922                         goto fail;
 923                 }
 924
 925                 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
 926                 free(name);
 927
 928                 if (r < 0)
 929                         goto fail;
 930
 931                 if ((r = service_set_socket_fd(SERVICE(u), cfd)) < 0)
 932                         goto fail;
 933
 934                 cfd = -1;
 935
 936                 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
 937                         goto fail;
 938         }
 939
 940         return;
 941
 942 fail:
 943         log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
 944         socket_enter_stop_pre(s, false);
 945
 946         if (cfd >= 0)
 947                 close_nointr_nofail(cfd);
 948 }
 949
 950 static void socket_run_next(Socket *s, bool success) {
 951         int r;
 952
 953         assert(s);
 954         assert(s->control_command);
 955         assert(s->control_command->command_next);
 956
 957         if (!success)
 958                 s->failure = true;
 959
 960         socket_unwatch_control_pid(s);
 961
 962         s->control_command = s->control_command->command_next;
 963
 964         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 965                 goto fail;
 966
 967         return;
 968
 969 fail:
 970         log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
 971
 972         if (s->state == SOCKET_START_POST)
 973                 socket_enter_stop_pre(s, false);
 974         else if (s->state == SOCKET_STOP_POST)
 975                 socket_enter_dead(s, false);
 976         else
 977                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
 978 }
 979
 980 static int socket_start(Unit *u) {
 981         Socket *s = SOCKET(u);
 982
 983         assert(s);
 984
 985         /* We cannot fulfill this request right now, try again later
 986          * please! */
 987         if (s->state == SOCKET_STOP_PRE ||
 988             s->state == SOCKET_STOP_PRE_SIGKILL ||
 989             s->state == SOCKET_STOP_PRE_SIGTERM ||
 990             s->state == SOCKET_STOP_POST ||
 991             s->state == SOCKET_FINAL_SIGTERM ||
 992             s->state == SOCKET_FINAL_SIGKILL)
 993                 return -EAGAIN;
 994
 995         if (s->state == SOCKET_START_PRE ||
 996             s->state == SOCKET_START_POST)
 997                 return 0;
 998
 999         /* Cannot run this without the service being around */
1000         if (s->service) {
1001                 if (s->service->meta.load_state != UNIT_LOADED)
1002                         return -ENOENT;
1003
1004                 /* If the service is alredy actvie we cannot start the
1005                  * socket */
1006                 if (s->service->state != SERVICE_DEAD &&
1007                     s->service->state != SERVICE_MAINTENANCE &&
1008                     s->service->state != SERVICE_AUTO_RESTART)
1009                         return -EBUSY;
1010         }
1011
1012         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1013
1014         s->failure = false;
1015         socket_enter_start_pre(s);
1016         return 0;
1017 }
1018
1019 static int socket_stop(Unit *u) {
1020         Socket *s = SOCKET(u);
1021
1022         assert(s);
1023
1024         /* We cannot fulfill this request right now, try again later
1025          * please! */
1026         if (s->state == SOCKET_START_PRE ||
1027             s->state == SOCKET_START_POST)
1028                 return -EAGAIN;
1029
1030         /* Already on it */
1031         if (s->state == SOCKET_STOP_PRE ||
1032             s->state == SOCKET_STOP_PRE_SIGTERM ||
1033             s->state == SOCKET_STOP_PRE_SIGKILL ||
1034             s->state == SOCKET_STOP_POST ||
1035             s->state == SOCKET_FINAL_SIGTERM ||
1036             s->state == SOCKET_FINAL_SIGTERM)
1037                 return 0;
1038
1039         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1040
1041         socket_enter_stop_pre(s, true);
1042         return 0;
1043 }
1044
1045 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1046         Socket *s = SOCKET(u);
1047         SocketPort *p;
1048         int r;
1049
1050         assert(u);
1051         assert(f);
1052         assert(fds);
1053
1054         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1055         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1056         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1057
1058         if (s->control_pid > 0)
1059                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
1060
1061         if (s->control_command_id >= 0)
1062                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1063
1064         LIST_FOREACH(port, p, s->ports) {
1065                 int copy;
1066
1067                 if (p->fd < 0)
1068                         continue;
1069
1070                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1071                         return copy;
1072
1073                 if (p->type == SOCKET_SOCKET) {
1074                         char *t;
1075
1076                         if ((r = socket_address_print(&p->address, &t)) < 0)
1077                                 return r;
1078
1079                         unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1080                         free(t);
1081                 } else {
1082                         assert(p->type == SOCKET_FIFO);
1083                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1084                 }
1085         }
1086
1087         return 0;
1088 }
1089
1090 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1091         Socket *s = SOCKET(u);
1092         int r;
1093
1094         assert(u);
1095         assert(key);
1096         assert(value);
1097         assert(fds);
1098
1099         if (streq(key, "state")) {
1100                 SocketState state;
1101
1102                 if ((state = socket_state_from_string(value)) < 0)
1103                         log_debug("Failed to parse state value %s", value);
1104                 else
1105                         s->deserialized_state = state;
1106         } else if (streq(key, "failure")) {
1107                 int b;
1108
1109                 if ((b = parse_boolean(value)) < 0)
1110                         log_debug("Failed to parse failure value %s", value);
1111                 else
1112                         s->failure = b || s->failure;
1113
1114         } else if (streq(key, "n-accepted")) {
1115                 unsigned k;
1116
1117                 if ((r = safe_atou(value, &k)) < 0)
1118                         log_debug("Failed to parse n-accepted value %s", value);
1119                 else
1120                         s->n_accepted += k;
1121         } else if (streq(key, "control-pid")) {
1122                 unsigned pid;
1123
1124                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1125                         log_debug("Failed to parse control-pid value %s", value);
1126                 else
1127                         s->control_pid = (pid_t) pid;
1128         } else if (streq(key, "control-command")) {
1129                 SocketExecCommand id;
1130
1131                 if ((id = socket_exec_command_from_string(value)) < 0)
1132                         log_debug("Failed to parse exec-command value %s", value);
1133                 else {
1134                         s->control_command_id = id;
1135                         s->control_command = s->exec_command[id];
1136                 }
1137         } else if (streq(key, "fifo")) {
1138                 int fd, skip = 0;
1139                 SocketPort *p;
1140
1141                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1142                         log_debug("Failed to parse fifo value %s", value);
1143                 else {
1144
1145                         LIST_FOREACH(port, p, s->ports)
1146                                 if (streq(p->path, value+skip))
1147                                         break;
1148
1149                         if (p) {
1150                                 if (p->fd >= 0)
1151                                         close_nointr_nofail(p->fd);
1152                                 p->fd = fdset_remove(fds, fd);
1153                         }
1154                 }
1155
1156         } else if (streq(key, "socket")) {
1157                 int fd, type, skip = 0;
1158                 SocketPort *p;
1159
1160                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1161                         log_debug("Failed to parse socket value %s", value);
1162                 else {
1163
1164                         LIST_FOREACH(port, p, s->ports)
1165                                 if (socket_address_is(&p->address, value+skip, type))
1166                                         break;
1167
1168                         if (p) {
1169                                 if (p->fd >= 0)
1170                                         close_nointr_nofail(p->fd);
1171                                 p->fd = fdset_remove(fds, fd);
1172                         }
1173                 }
1174
1175         } else
1176                 log_debug("Unknown serialization key '%s'", key);
1177
1178         return 0;
1179 }
1180
1181 static UnitActiveState socket_active_state(Unit *u) {
1182         assert(u);
1183
1184         return state_translation_table[SOCKET(u)->state];
1185 }
1186
1187 static const char *socket_sub_state_to_string(Unit *u) {
1188         assert(u);
1189
1190         return socket_state_to_string(SOCKET(u)->state);
1191 }
1192
1193 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1194         Socket *s = SOCKET(u);
1195         int cfd = -1;
1196
1197         assert(s);
1198         assert(fd >= 0);
1199
1200         if (s->state != SOCKET_LISTENING)
1201                 return;
1202
1203         log_debug("Incoming traffic on %s", u->meta.id);
1204
1205         if (events != EPOLLIN) {
1206                 log_error("Got invalid poll event on socket.");
1207                 goto fail;
1208         }
1209
1210         if (w->socket_accept) {
1211                 for (;;) {
1212
1213                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1214
1215                                 if (errno == EINTR)
1216                                         continue;
1217
1218                                 log_error("Failed to accept socket: %m");
1219                                 goto fail;
1220                         }
1221
1222                         break;
1223                 }
1224
1225                 if (s->tcpwrap_name)
1226                         if (!socket_tcpwrap(cfd, s->tcpwrap_name)) {
1227                                 close_nointr_nofail(cfd);
1228                                 return;
1229                         }
1230         }
1231
1232         socket_enter_running(s, cfd);
1233         return;
1234
1235 fail:
1236         socket_enter_stop_pre(s, false);
1237 }
1238
1239 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1240         Socket *s = SOCKET(u);
1241         bool success;
1242
1243         assert(s);
1244         assert(pid >= 0);
1245
1246         if (pid != s->control_pid)
1247                 return;
1248
1249         s->control_pid = 0;
1250
1251         success = is_clean_exit(code, status);
1252         s->failure = s->failure || !success;
1253
1254         if (s->control_command)
1255                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1256
1257         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1258
1259         if (s->control_command && s->control_command->command_next && success) {
1260                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1261                 socket_run_next(s, success);
1262         } else {
1263                 s->control_command = NULL;
1264                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1265
1266                 /* No further commands for this step, so let's figure
1267                  * out what to do next */
1268
1269                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1270
1271                 switch (s->state) {
1272
1273                 case SOCKET_START_PRE:
1274                         if (success)
1275                                 socket_enter_start_post(s);
1276                         else
1277                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1278                         break;
1279
1280                 case SOCKET_START_POST:
1281                         if (success)
1282                                 socket_enter_listening(s);
1283                         else
1284                                 socket_enter_stop_pre(s, false);
1285                         break;
1286
1287                 case SOCKET_STOP_PRE:
1288                 case SOCKET_STOP_PRE_SIGTERM:
1289                 case SOCKET_STOP_PRE_SIGKILL:
1290                         socket_enter_stop_post(s, success);
1291                         break;
1292
1293                 case SOCKET_STOP_POST:
1294                 case SOCKET_FINAL_SIGTERM:
1295                 case SOCKET_FINAL_SIGKILL:
1296                         socket_enter_dead(s, success);
1297                         break;
1298
1299                 default:
1300                         assert_not_reached("Uh, control process died at wrong time.");
1301                 }
1302         }
1303 }
1304
1305 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1306         Socket *s = SOCKET(u);
1307
1308         assert(s);
1309         assert(elapsed == 1);
1310         assert(w == &s->timer_watch);
1311
1312         switch (s->state) {
1313
1314         case SOCKET_START_PRE:
1315                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1316                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1317
1318         case SOCKET_START_POST:
1319                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1320                 socket_enter_stop_pre(s, false);
1321                 break;
1322
1323         case SOCKET_STOP_PRE:
1324                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1325                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1326                 break;
1327
1328         case SOCKET_STOP_PRE_SIGTERM:
1329                 log_warning("%s stopping timed out. Killing.", u->meta.id);
1330                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1331                 break;
1332
1333         case SOCKET_STOP_PRE_SIGKILL:
1334                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1335                 socket_enter_stop_post(s, false);
1336                 break;
1337
1338         case SOCKET_STOP_POST:
1339                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1340                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1341                 break;
1342
1343         case SOCKET_FINAL_SIGTERM:
1344                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1345                 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1346                 break;
1347
1348         case SOCKET_FINAL_SIGKILL:
1349                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1350                 socket_enter_dead(s, false);
1351                 break;
1352
1353         default:
1354                 assert_not_reached("Timeout at wrong time.");
1355         }
1356 }
1357
1358 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1359         int *rfds;
1360         unsigned rn_fds, k;
1361         SocketPort *p;
1362
1363         assert(s);
1364         assert(fds);
1365         assert(n_fds);
1366
1367         /* Called from the service code for requesting our fds */
1368
1369         rn_fds = 0;
1370         LIST_FOREACH(port, p, s->ports)
1371                 if (p->fd >= 0)
1372                         rn_fds++;
1373
1374         if (!(rfds = new(int, rn_fds)) < 0)
1375                 return -ENOMEM;
1376
1377         k = 0;
1378         LIST_FOREACH(port, p, s->ports)
1379                 if (p->fd >= 0)
1380                         rfds[k++] = p->fd;
1381
1382         assert(k == rn_fds);
1383
1384         *fds = rfds;
1385         *n_fds = rn_fds;
1386
1387         return 0;
1388 }
1389
1390 void socket_notify_service_dead(Socket *s) {
1391         assert(s);
1392
1393         /* The service is dead. Dang. */
1394
1395         if (s->state == SOCKET_RUNNING) {
1396                 log_debug("%s got notified about service death.", s->meta.id);
1397                 socket_enter_listening(s);
1398         }
1399 }
1400
1401 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1402         [SOCKET_DEAD] = "dead",
1403         [SOCKET_START_PRE] = "start-pre",
1404         [SOCKET_START_POST] = "start-post",
1405         [SOCKET_LISTENING] = "listening",
1406         [SOCKET_RUNNING] = "running",
1407         [SOCKET_STOP_PRE] = "stop-pre",
1408         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1409         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1410         [SOCKET_STOP_POST] = "stop-post",
1411         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1412         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1413         [SOCKET_MAINTENANCE] = "maintenance"
1414 };
1415
1416 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1417
1418 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1419         [SOCKET_EXEC_START_PRE] = "StartPre",
1420         [SOCKET_EXEC_START_POST] = "StartPost",
1421         [SOCKET_EXEC_STOP_PRE] = "StopPre",
1422         [SOCKET_EXEC_STOP_POST] = "StopPost"
1423 };
1424
1425 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1426
1427 const UnitVTable socket_vtable = {
1428         .suffix = ".socket",
1429
1430         .init = socket_init,
1431         .done = socket_done,
1432         .load = socket_load,
1433
1434         .coldplug = socket_coldplug,
1435
1436         .dump = socket_dump,
1437
1438         .start = socket_start,
1439         .stop = socket_stop,
1440
1441         .serialize = socket_serialize,
1442         .deserialize_item = socket_deserialize_item,
1443
1444         .active_state = socket_active_state,
1445         .sub_state_to_string = socket_sub_state_to_string,
1446
1447         .fd_event = socket_fd_event,
1448         .sigchld_event = socket_sigchld_event,
1449         .timer_event = socket_timer_event,
1450
1451         .bus_message_handler = bus_socket_message_handler
1452 };