socket.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <unistd.h>
   6 #include <errno.h>
   7 #include <fcntl.h>
   8 #include <sys/poll.h>
   9 #include <signal.h>
  10
  11 #include "unit.h"
  12 #include "socket.h"
  13 #include "log.h"
  14
  15 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  16         [SOCKET_DEAD] = UNIT_INACTIVE,
  17         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  18         [SOCKET_START_POST] = UNIT_ACTIVATING,
  19         [SOCKET_LISTENING] = UNIT_ACTIVE,
  20         [SOCKET_RUNNING] = UNIT_ACTIVE,
  21         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  22         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  23         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  24         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  25         [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING,
  26         [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING,
  27         [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
  28 };
  29
  30 static const char* const state_string_table[_SOCKET_STATE_MAX] = {
  31         [SOCKET_DEAD] = "dead",
  32         [SOCKET_START_PRE] = "start-pre",
  33         [SOCKET_START_POST] = "start-post",
  34         [SOCKET_LISTENING] = "listening",
  35         [SOCKET_RUNNING] = "running",
  36         [SOCKET_STOP_PRE] = "stop-pre",
  37         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
  38         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
  39         [SOCKET_STOP_POST] = "stop-post",
  40         [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm",
  41         [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill",
  42         [SOCKET_MAINTAINANCE] = "maintainance"
  43 };
  44
  45 static void socket_done(Unit *u) {
  46         Socket *s = SOCKET(u);
  47         SocketPort *p;
  48
  49         assert(s);
  50
  51         while ((p = s->ports)) {
  52                 LIST_REMOVE(SocketPort, port, s->ports, p);
  53
  54                 if (p->fd >= 0)
  55                         close_nointr(p->fd);
  56                 free(p->path);
  57                 free(p);
  58         }
  59
  60         exec_context_done(&s->exec_context);
  61         exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX);
  62         s->control_command = NULL;
  63
  64         if (s->control_pid > 0) {
  65                 unit_unwatch_pid(u, s->control_pid);
  66                 s->control_pid = 0;
  67         }
  68
  69         s->service = NULL;
  70
  71         free(s->bind_to_device);
  72
  73         unit_unwatch_timer(u, &s->timer_watch);
  74 }
  75
  76 static int socket_init(Unit *u) {
  77         Socket *s = SOCKET(u);
  78         char *t;
  79         int r;
  80
  81         /* First, reset everything to the defaults, in case this is a
  82          * reload */
  83
  84         s->state = 0;
  85         s->timer_watch.type = WATCH_INVALID;
  86         s->bind_ipv6_only = false;
  87         s->backlog = SOMAXCONN;
  88         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  89         exec_context_init(&s->exec_context);
  90
  91         if ((r = unit_load_fragment_and_dropin(u)) < 0)
  92                 goto fail;
  93
  94         if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) {
  95                 r = -ENOMEM;
  96                 goto fail;
  97         }
  98
  99         r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service);
 100         free(t);
 101
 102         if (r < 0)
 103                 goto fail;
 104
 105         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0)
 106                 goto fail;
 107
 108         return 0;
 109
 110 fail:
 111         socket_done(u);
 112         return r;
 113 }
 114
 115 static const char* listen_lookup(int type) {
 116
 117         if (type == SOCK_STREAM)
 118                 return "ListenStream";
 119         else if (type == SOCK_DGRAM)
 120                 return "ListenDatagram";
 121         else if (type == SOCK_SEQPACKET)
 122                 return "ListenSequentialPacket";
 123
 124         assert_not_reached("Unknown socket type");
 125         return NULL;
 126 }
 127
 128 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 129
 130         static const char* const command_table[_SOCKET_EXEC_MAX] = {
 131                 [SOCKET_EXEC_START_PRE] = "StartPre",
 132                 [SOCKET_EXEC_START_POST] = "StartPost",
 133                 [SOCKET_EXEC_STOP_PRE] = "StopPre",
 134                 [SOCKET_EXEC_STOP_POST] = "StopPost"
 135         };
 136
 137         SocketExecCommand c;
 138         Socket *s = SOCKET(u);
 139         SocketPort *p;
 140         char *prefix2;
 141
 142         assert(s);
 143
 144         prefix2 = strappend(prefix, "\t");
 145         if (!prefix2)
 146                 prefix2 = "";
 147
 148         fprintf(f,
 149                 "%sSocket State: %s\n"
 150                 "%sBindIPv6Only: %s\n"
 151                 "%sBacklog: %u\n",
 152                 prefix, state_string_table[s->state],
 153                 prefix, yes_no(s->bind_ipv6_only),
 154                 prefix, s->backlog);
 155
 156         if (s->bind_to_device)
 157                 fprintf(f,
 158                         "%sBindToDevice: %s\n",
 159                         prefix, s->bind_to_device);
 160
 161         LIST_FOREACH(port, p, s->ports) {
 162
 163                 if (p->type == SOCKET_SOCKET) {
 164                         const char *t;
 165                         int r;
 166                         char *k;
 167
 168                         if ((r = socket_address_print(&p->address, &k)) < 0)
 169                                 t = strerror(-r);
 170                         else
 171                                 t = k;
 172
 173                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 174                         free(k);
 175                 } else
 176                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 177         }
 178
 179         exec_context_dump(&s->exec_context, f, prefix);
 180
 181         for (c = 0; c < _SOCKET_EXEC_MAX; c++) {
 182                 if (!s->exec_command[c])
 183                         continue;
 184
 185                 fprintf(f, "%s→ %s:\n",
 186                         prefix, command_table[c]);
 187
 188                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 189         }
 190
 191         free(prefix2);
 192 }
 193
 194 static void socket_close_fds(Socket *s) {
 195         SocketPort *p;
 196
 197         assert(s);
 198
 199         LIST_FOREACH(port, p, s->ports) {
 200                 if (p->fd < 0)
 201                         continue;
 202
 203                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 204                 assert_se(close_nointr(p->fd) >= 0);
 205
 206                 p->fd = -1;
 207         }
 208 }
 209
 210 static int socket_open_fds(Socket *s) {
 211         SocketPort *p;
 212         int r;
 213
 214         assert(s);
 215
 216         LIST_FOREACH(port, p, s->ports) {
 217
 218                 if (p->fd >= 0)
 219                         continue;
 220
 221                 if (p->type == SOCKET_SOCKET) {
 222
 223                         if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0)
 224                                 goto rollback;
 225
 226                 } else {
 227                         struct stat st;
 228                         assert(p->type == SOCKET_FIFO);
 229
 230                         if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) {
 231                                 r = -errno;
 232                                 goto rollback;
 233                         }
 234
 235                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 236                                 r = -errno;
 237                                 goto rollback;
 238                         }
 239
 240                         if (fstat(p->fd, &st) < 0) {
 241                                 r = -errno;
 242                                 goto rollback;
 243                         }
 244
 245                         /* FIXME verify user, access mode */
 246
 247                         if (!S_ISFIFO(st.st_mode)) {
 248                                 r = -EEXIST;
 249                                 goto rollback;
 250                         }
 251                 }
 252         }
 253
 254         return 0;
 255
 256 rollback:
 257         socket_close_fds(s);
 258         return r;
 259 }
 260
 261 static void socket_unwatch_fds(Socket *s) {
 262         SocketPort *p;
 263
 264         assert(s);
 265
 266         LIST_FOREACH(port, p, s->ports) {
 267                 if (p->fd < 0)
 268                         continue;
 269
 270                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 271         }
 272 }
 273
 274 static int socket_watch_fds(Socket *s) {
 275         SocketPort *p;
 276         int r;
 277
 278         assert(s);
 279
 280         LIST_FOREACH(port, p, s->ports) {
 281                 if (p->fd < 0)
 282                         continue;
 283
 284                 if ((r = unit_watch_fd(UNIT(s), p->fd, POLLIN, &p->fd_watch)) < 0)
 285                         goto fail;
 286         }
 287
 288         return 0;
 289
 290 fail:
 291         socket_unwatch_fds(s);
 292         return r;
 293 }
 294
 295 static void socket_set_state(Socket *s, SocketState state) {
 296         SocketState old_state;
 297         assert(s);
 298
 299         old_state = s->state;
 300         s->state = state;
 301
 302         if (state != SOCKET_START_PRE &&
 303             state != SOCKET_START_POST &&
 304             state != SOCKET_STOP_PRE &&
 305             state != SOCKET_STOP_PRE_SIGTERM &&
 306             state != SOCKET_STOP_PRE_SIGKILL &&
 307             state != SOCKET_STOP_POST &&
 308             state != SOCKET_STOP_POST_SIGTERM &&
 309             state != SOCKET_STOP_POST_SIGKILL)
 310                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 311
 312         if (state != SOCKET_START_PRE &&
 313             state != SOCKET_START_POST &&
 314             state != SOCKET_STOP_PRE &&
 315             state != SOCKET_STOP_PRE_SIGTERM &&
 316             state != SOCKET_STOP_PRE_SIGKILL &&
 317             state != SOCKET_STOP_POST &&
 318             state != SOCKET_STOP_POST_SIGTERM &&
 319             state != SOCKET_STOP_POST_SIGKILL)
 320                 if (s->control_pid > 0) {
 321                         unit_unwatch_pid(UNIT(s), s->control_pid);
 322                         s->control_pid = 0;
 323                 }
 324
 325         if (state != SOCKET_START_PRE &&
 326             state != SOCKET_START_POST &&
 327             state != SOCKET_STOP_PRE &&
 328             state != SOCKET_STOP_POST)
 329                 s->control_command = NULL;
 330
 331         if (state != SOCKET_START_POST &&
 332             state != SOCKET_LISTENING &&
 333             state != SOCKET_RUNNING &&
 334             state != SOCKET_STOP_PRE &&
 335             state != SOCKET_STOP_PRE_SIGTERM &&
 336             state != SOCKET_STOP_PRE_SIGKILL)
 337                 socket_close_fds(s);
 338
 339         if (state != SOCKET_LISTENING)
 340                 socket_unwatch_fds(s);
 341
 342         log_debug("%s changing %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
 343
 344         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 345 }
 346
 347 static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
 348         pid_t pid;
 349         int r;
 350
 351         assert(s);
 352         assert(c);
 353         assert(_pid);
 354
 355         if (timeout) {
 356                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 357                         goto fail;
 358         } else
 359                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 360
 361         if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0)
 362                 goto fail;
 363
 364         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 365                 /* FIXME: we need to do something here */
 366                 goto fail;
 367
 368         *_pid = pid;
 369
 370         return 0;
 371
 372 fail:
 373         if (timeout)
 374                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 375
 376         return r;
 377 }
 378
 379 static void socket_enter_dead(Socket *s, bool success) {
 380         assert(s);
 381
 382         if (!success)
 383                 s->failure = true;
 384
 385         socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
 386 }
 387
 388 static void socket_enter_stop_post(Socket *s, bool success) {
 389         int r;
 390         assert(s);
 391
 392         if (!success)
 393                 s->failure = true;
 394
 395         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 396
 397                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 398                         goto fail;
 399
 400                 socket_set_state(s, SOCKET_STOP_POST);
 401         } else
 402                 socket_enter_dead(s, true);
 403
 404         return;
 405
 406 fail:
 407         log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 408         socket_enter_dead(s, false);
 409 }
 410
 411 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 412         int r;
 413
 414         assert(s);
 415
 416         if (!success)
 417                 s->failure = true;
 418
 419         if (s->control_pid > 0) {
 420                 int sig;
 421
 422                 sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
 423
 424                 if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
 425                         r = -errno;
 426                         goto fail;
 427                 }
 428
 429                 socket_set_state(s, state);
 430         } else
 431                 socket_enter_dead(s, true);
 432
 433         return;
 434
 435 fail:
 436         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
 437
 438         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 439                 socket_enter_stop_post(s, false);
 440         else
 441                 socket_enter_dead(s, false);
 442 }
 443
 444 static void socket_enter_stop_pre(Socket *s, bool success) {
 445         int r;
 446         assert(s);
 447
 448         if (!success)
 449                 s->failure = true;
 450
 451         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 452
 453                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 454                         goto fail;
 455
 456                 socket_set_state(s, SOCKET_STOP_PRE);
 457         } else
 458                 socket_enter_stop_post(s, true);
 459
 460         return;
 461
 462 fail:
 463         log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
 464         socket_enter_stop_post(s, false);
 465 }
 466
 467 static void socket_enter_start_post(Socket *s) {
 468         int r;
 469         assert(s);
 470
 471         if ((r = socket_open_fds(s)) < 0 ||
 472             (r = socket_watch_fds(s)) < 0) {
 473                 log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
 474                 goto fail;
 475         }
 476
 477         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 478
 479                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
 480                         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 481                         goto fail;
 482                 }
 483
 484                 socket_set_state(s, SOCKET_START_POST);
 485         } else
 486                 socket_set_state(s, SOCKET_LISTENING);
 487
 488         return;
 489
 490 fail:
 491         socket_enter_stop_pre(s, false);
 492 }
 493
 494 static void socket_enter_start_pre(Socket *s) {
 495         int r;
 496         assert(s);
 497
 498         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
 499
 500                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 501                         goto fail;
 502
 503                 socket_set_state(s, SOCKET_START_PRE);
 504         } else
 505                 socket_enter_start_post(s);
 506
 507         return;
 508
 509 fail:
 510         log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
 511         socket_enter_dead(s, false);
 512 }
 513
 514 static void socket_enter_running(Socket *s) {
 515         int r;
 516
 517         assert(s);
 518
 519         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
 520                 goto fail;
 521
 522         socket_set_state(s, SOCKET_RUNNING);
 523         return;
 524
 525 fail:
 526         log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
 527         socket_enter_dead(s, false);
 528 }
 529
 530 static void socket_run_next(Socket *s, bool success) {
 531         int r;
 532
 533         assert(s);
 534         assert(s->control_command);
 535         assert(s->control_command->command_next);
 536
 537         if (!success)
 538                 s->failure = true;
 539
 540         s->control_command = s->control_command->command_next;
 541
 542         if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 543                 goto fail;
 544
 545         return;
 546
 547 fail:
 548         if (s->state == SOCKET_STOP_PRE)
 549                 socket_enter_stop_post(s, false);
 550         else if (s->state == SOCKET_STOP_POST)
 551                 socket_enter_dead(s, false);
 552         else
 553                 socket_enter_stop_pre(s, false);
 554 }
 555
 556 static int socket_start(Unit *u) {
 557         Socket *s = SOCKET(u);
 558
 559         assert(s);
 560
 561         /* We cannot fulfill this request right now, try again later
 562          * please! */
 563         if (s->state == SOCKET_STOP_PRE ||
 564             s->state == SOCKET_STOP_PRE_SIGKILL ||
 565             s->state == SOCKET_STOP_PRE_SIGTERM ||
 566             s->state == SOCKET_STOP_POST ||
 567             s->state == SOCKET_STOP_POST_SIGTERM ||
 568             s->state == SOCKET_STOP_POST_SIGKILL)
 569                 return -EAGAIN;
 570
 571         if (s->state == SOCKET_START_PRE ||
 572             s->state == SOCKET_START_POST)
 573                 return 0;
 574
 575         /* Cannot run this without the service being around */
 576         if (s->service->meta.load_state != UNIT_LOADED)
 577                 return -ENOENT;
 578
 579         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
 580
 581         s->failure = false;
 582         socket_enter_start_pre(s);
 583         return 0;
 584 }
 585
 586 static int socket_stop(Unit *u) {
 587         Socket *s = SOCKET(u);
 588
 589         assert(s);
 590
 591         /* We cannot fulfill this request right now, try again later
 592          * please! */
 593         if (s->state == SOCKET_START_PRE ||
 594             s->state == SOCKET_START_POST)
 595                 return -EAGAIN;
 596
 597         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
 598
 599         socket_enter_stop_pre(s, true);
 600         return 0;
 601 }
 602
 603 static UnitActiveState socket_active_state(Unit *u) {
 604         assert(u);
 605
 606         return state_translation_table[SOCKET(u)->state];
 607 }
 608
 609 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
 610         Socket *s = SOCKET(u);
 611
 612         assert(s);
 613
 614         log_info("Incoming traffic on %s", unit_id(u));
 615
 616         if (events != POLLIN)
 617                 socket_enter_stop_pre(s, false);
 618
 619         socket_enter_running(s);
 620 }
 621
 622 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 623         Socket *s = SOCKET(u);
 624         bool success;
 625
 626         assert(s);
 627         assert(pid >= 0);
 628
 629         success = code == CLD_EXITED || status == 0;
 630         s->failure = s->failure || !success;
 631
 632         assert(s->control_pid == pid);
 633         assert(s->control_command);
 634
 635         exec_status_fill(&s->control_command->exec_status, pid, code, status);
 636         s->control_pid = 0;
 637
 638         log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status);
 639
 640         if (s->control_command->command_next &&
 641             (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) {
 642                 log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
 643                 socket_run_next(s, success);
 644         } else {
 645                 /* No further commands for this step, so let's figure
 646                  * out what to do next */
 647
 648                 log_debug("%s finished with state %s", unit_id(u), state_string_table[s->state]);
 649
 650                 switch (s->state) {
 651
 652                 case SOCKET_START_PRE:
 653                         if (success)
 654                                 socket_enter_start_post(s);
 655                         else
 656                                 socket_enter_stop_pre(s, false);
 657                         break;
 658
 659                 case SOCKET_START_POST:
 660                         if (success)
 661                                 socket_set_state(s, SOCKET_LISTENING);
 662                         else
 663                                 socket_enter_stop_pre(s, false);
 664                         break;
 665
 666                 case SOCKET_STOP_PRE:
 667                 case SOCKET_STOP_PRE_SIGTERM:
 668                 case SOCKET_STOP_PRE_SIGKILL:
 669                         socket_enter_stop_post(s, success);
 670                         break;
 671
 672                 case SOCKET_STOP_POST:
 673                 case SOCKET_STOP_POST_SIGTERM:
 674                 case SOCKET_STOP_POST_SIGKILL:
 675                         socket_enter_dead(s, success);
 676                         break;
 677
 678                 default:
 679                         assert_not_reached("Uh, control process died at wrong time.");
 680                 }
 681         }
 682 }
 683
 684 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 685         Socket *s = SOCKET(u);
 686
 687         assert(s);
 688         assert(elapsed == 1);
 689
 690         assert(w == &s->timer_watch);
 691
 692         switch (s->state) {
 693
 694         case SOCKET_START_PRE:
 695         case SOCKET_START_POST:
 696                 log_warning("%s operation timed out. Stopping.", unit_id(u));
 697                 socket_enter_stop_pre(s, false);
 698                 break;
 699
 700         case SOCKET_STOP_PRE:
 701                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
 702                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
 703                 break;
 704
 705         case SOCKET_STOP_PRE_SIGTERM:
 706                 log_warning("%s stopping timed out. Killing.", unit_id(u));
 707                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
 708                 break;
 709
 710         case SOCKET_STOP_PRE_SIGKILL:
 711                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
 712                 socket_enter_stop_post(s, false);
 713                 break;
 714
 715         case SOCKET_STOP_POST:
 716                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
 717                 socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
 718                 break;
 719
 720         case SOCKET_STOP_POST_SIGTERM:
 721                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
 722                 socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
 723                 break;
 724
 725         case SOCKET_STOP_POST_SIGKILL:
 726                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
 727                 socket_enter_dead(s, false);
 728                 break;
 729
 730         default:
 731                 assert_not_reached("Timeout at wrong time.");
 732         }
 733 }
 734
 735 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
 736         int *rfds;
 737         unsigned rn_fds, k;
 738         SocketPort *p;
 739
 740         assert(s);
 741         assert(fds);
 742         assert(n_fds);
 743
 744         /* Called from the service code for requesting our fds */
 745
 746         rn_fds = 0;
 747         LIST_FOREACH(port, p, s->ports)
 748                 if (p->fd >= 0)
 749                         rn_fds++;
 750
 751         if (!(rfds = new(int, rn_fds)) < 0)
 752                 return -ENOMEM;
 753
 754         k = 0;
 755         LIST_FOREACH(port, p, s->ports)
 756                 if (p->fd >= 0)
 757                         rfds[k++] = p->fd;
 758
 759         assert(k == rn_fds);
 760
 761         *fds = rfds;
 762         *n_fds = rn_fds;
 763
 764         return 0;
 765 }
 766
 767 const UnitVTable socket_vtable = {
 768         .suffix = ".socket",
 769
 770         .init = socket_init,
 771         .done = socket_done,
 772
 773         .dump = socket_dump,
 774
 775         .start = socket_start,
 776         .stop = socket_stop,
 777
 778         .active_state = socket_active_state,
 779
 780         .fd_event = socket_fd_event,
 781         .sigchld_event = socket_sigchld_event,
 782         .timer_event = socket_timer_event
 783 };