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         assert(f);
 144
 145         prefix2 = strappend(prefix, "\t");
 146         if (!prefix2)
 147                 prefix2 = "";
 148
 149         fprintf(f,
 150                 "%sSocket State: %s\n"
 151                 "%sBindIPv6Only: %s\n"
 152                 "%sBacklog: %u\n",
 153                 prefix, state_string_table[s->state],
 154                 prefix, yes_no(s->bind_ipv6_only),
 155                 prefix, s->backlog);
 156
 157         if (s->bind_to_device)
 158                 fprintf(f,
 159                         "%sBindToDevice: %s\n",
 160                         prefix, s->bind_to_device);
 161
 162         LIST_FOREACH(port, p, s->ports) {
 163
 164                 if (p->type == SOCKET_SOCKET) {
 165                         const char *t;
 166                         int r;
 167                         char *k;
 168
 169                         if ((r = socket_address_print(&p->address, &k)) < 0)
 170                                 t = strerror(-r);
 171                         else
 172                                 t = k;
 173
 174                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 175                         free(k);
 176                 } else
 177                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 178         }
 179
 180         exec_context_dump(&s->exec_context, f, prefix);
 181
 182         for (c = 0; c < _SOCKET_EXEC_MAX; c++) {
 183                 if (!s->exec_command[c])
 184                         continue;
 185
 186                 fprintf(f, "%s→ %s:\n",
 187                         prefix, command_table[c]);
 188
 189                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 190         }
 191
 192         free(prefix2);
 193 }
 194
 195 static void socket_close_fds(Socket *s) {
 196         SocketPort *p;
 197
 198         assert(s);
 199
 200         LIST_FOREACH(port, p, s->ports) {
 201                 if (p->fd < 0)
 202                         continue;
 203
 204                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 205                 assert_se(close_nointr(p->fd) >= 0);
 206
 207                 p->fd = -1;
 208         }
 209 }
 210
 211 static int socket_open_fds(Socket *s) {
 212         SocketPort *p;
 213         int r;
 214
 215         assert(s);
 216
 217         LIST_FOREACH(port, p, s->ports) {
 218
 219                 if (p->fd >= 0)
 220                         continue;
 221
 222                 if (p->type == SOCKET_SOCKET) {
 223
 224                         if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0)
 225                                 goto rollback;
 226
 227                 } else {
 228                         struct stat st;
 229                         assert(p->type == SOCKET_FIFO);
 230
 231                         if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) {
 232                                 r = -errno;
 233                                 goto rollback;
 234                         }
 235
 236                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 237                                 r = -errno;
 238                                 goto rollback;
 239                         }
 240
 241                         if (fstat(p->fd, &st) < 0) {
 242                                 r = -errno;
 243                                 goto rollback;
 244                         }
 245
 246                         /* FIXME verify user, access mode */
 247
 248                         if (!S_ISFIFO(st.st_mode)) {
 249                                 r = -EEXIST;
 250                                 goto rollback;
 251                         }
 252                 }
 253         }
 254
 255         return 0;
 256
 257 rollback:
 258         socket_close_fds(s);
 259         return r;
 260 }
 261
 262 static void socket_unwatch_fds(Socket *s) {
 263         SocketPort *p;
 264
 265         assert(s);
 266
 267         LIST_FOREACH(port, p, s->ports) {
 268                 if (p->fd < 0)
 269                         continue;
 270
 271                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 272         }
 273 }
 274
 275 static int socket_watch_fds(Socket *s) {
 276         SocketPort *p;
 277         int r;
 278
 279         assert(s);
 280
 281         LIST_FOREACH(port, p, s->ports) {
 282                 if (p->fd < 0)
 283                         continue;
 284
 285                 if ((r = unit_watch_fd(UNIT(s), p->fd, POLLIN, &p->fd_watch)) < 0)
 286                         goto fail;
 287         }
 288
 289         return 0;
 290
 291 fail:
 292         socket_unwatch_fds(s);
 293         return r;
 294 }
 295
 296 static void socket_set_state(Socket *s, SocketState state) {
 297         SocketState old_state;
 298         assert(s);
 299
 300         old_state = s->state;
 301         s->state = state;
 302
 303         if (state != SOCKET_START_PRE &&
 304             state != SOCKET_START_POST &&
 305             state != SOCKET_STOP_PRE &&
 306             state != SOCKET_STOP_PRE_SIGTERM &&
 307             state != SOCKET_STOP_PRE_SIGKILL &&
 308             state != SOCKET_STOP_POST &&
 309             state != SOCKET_STOP_POST_SIGTERM &&
 310             state != SOCKET_STOP_POST_SIGKILL)
 311                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 312
 313         if (state != SOCKET_START_PRE &&
 314             state != SOCKET_START_POST &&
 315             state != SOCKET_STOP_PRE &&
 316             state != SOCKET_STOP_PRE_SIGTERM &&
 317             state != SOCKET_STOP_PRE_SIGKILL &&
 318             state != SOCKET_STOP_POST &&
 319             state != SOCKET_STOP_POST_SIGTERM &&
 320             state != SOCKET_STOP_POST_SIGKILL)
 321                 if (s->control_pid > 0) {
 322                         unit_unwatch_pid(UNIT(s), s->control_pid);
 323                         s->control_pid = 0;
 324                 }
 325
 326         if (state != SOCKET_START_PRE &&
 327             state != SOCKET_START_POST &&
 328             state != SOCKET_STOP_PRE &&
 329             state != SOCKET_STOP_POST)
 330                 s->control_command = NULL;
 331
 332         if (state != SOCKET_START_POST &&
 333             state != SOCKET_LISTENING &&
 334             state != SOCKET_RUNNING &&
 335             state != SOCKET_STOP_PRE &&
 336             state != SOCKET_STOP_PRE_SIGTERM &&
 337             state != SOCKET_STOP_PRE_SIGKILL)
 338                 socket_close_fds(s);
 339
 340         if (state != SOCKET_LISTENING)
 341                 socket_unwatch_fds(s);
 342
 343         log_debug("%s changing %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
 344
 345         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 346 }
 347
 348 static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
 349         pid_t pid;
 350         int r;
 351
 352         assert(s);
 353         assert(c);
 354         assert(_pid);
 355
 356         if (timeout) {
 357                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 358                         goto fail;
 359         } else
 360                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 361
 362         if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0)
 363                 goto fail;
 364
 365         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 366                 /* FIXME: we need to do something here */
 367                 goto fail;
 368
 369         *_pid = pid;
 370
 371         return 0;
 372
 373 fail:
 374         if (timeout)
 375                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 376
 377         return r;
 378 }
 379
 380 static void socket_enter_dead(Socket *s, bool success) {
 381         assert(s);
 382
 383         if (!success)
 384                 s->failure = true;
 385
 386         socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
 387 }
 388
 389 static void socket_enter_stop_post(Socket *s, bool success) {
 390         int r;
 391         assert(s);
 392
 393         if (!success)
 394                 s->failure = true;
 395
 396         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 397
 398                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 399                         goto fail;
 400
 401                 socket_set_state(s, SOCKET_STOP_POST);
 402         } else
 403                 socket_enter_dead(s, true);
 404
 405         return;
 406
 407 fail:
 408         log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 409         socket_enter_dead(s, false);
 410 }
 411
 412 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 413         int r;
 414
 415         assert(s);
 416
 417         if (!success)
 418                 s->failure = true;
 419
 420         if (s->control_pid > 0) {
 421                 int sig;
 422
 423                 sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
 424
 425                 if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
 426                         r = -errno;
 427                         goto fail;
 428                 }
 429
 430                 socket_set_state(s, state);
 431         } else
 432                 socket_enter_dead(s, true);
 433
 434         return;
 435
 436 fail:
 437         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
 438
 439         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 440                 socket_enter_stop_post(s, false);
 441         else
 442                 socket_enter_dead(s, false);
 443 }
 444
 445 static void socket_enter_stop_pre(Socket *s, bool success) {
 446         int r;
 447         assert(s);
 448
 449         if (!success)
 450                 s->failure = true;
 451
 452         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 453
 454                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 455                         goto fail;
 456
 457                 socket_set_state(s, SOCKET_STOP_PRE);
 458         } else
 459                 socket_enter_stop_post(s, true);
 460
 461         return;
 462
 463 fail:
 464         log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
 465         socket_enter_stop_post(s, false);
 466 }
 467
 468 static void socket_enter_listening(Socket *s) {
 469         int r;
 470         assert(s);
 471
 472         if ((r = socket_watch_fds(s)) < 0) {
 473                 log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r));
 474                 goto fail;
 475         }
 476
 477         socket_set_state(s, SOCKET_LISTENING);
 478         return;
 479
 480 fail:
 481         socket_enter_stop_pre(s, false);
 482 }
 483
 484 static void socket_enter_start_post(Socket *s) {
 485         int r;
 486         assert(s);
 487
 488         if ((r = socket_open_fds(s)) < 0) {
 489                 log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
 490                 goto fail;
 491         }
 492
 493         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 494
 495                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
 496                         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 497                         goto fail;
 498                 }
 499
 500                 socket_set_state(s, SOCKET_START_POST);
 501         } else
 502                 socket_enter_listening(s);
 503
 504         return;
 505
 506 fail:
 507         socket_enter_stop_pre(s, false);
 508 }
 509
 510 static void socket_enter_start_pre(Socket *s) {
 511         int r;
 512         assert(s);
 513
 514         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
 515
 516                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 517                         goto fail;
 518
 519                 socket_set_state(s, SOCKET_START_PRE);
 520         } else
 521                 socket_enter_start_post(s);
 522
 523         return;
 524
 525 fail:
 526         log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
 527         socket_enter_dead(s, false);
 528 }
 529
 530 static void socket_enter_running(Socket *s) {
 531         int r;
 532
 533         assert(s);
 534
 535         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
 536                 goto fail;
 537
 538         socket_set_state(s, SOCKET_RUNNING);
 539         return;
 540
 541 fail:
 542         log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
 543         socket_enter_dead(s, false);
 544 }
 545
 546 static void socket_run_next(Socket *s, bool success) {
 547         int r;
 548
 549         assert(s);
 550         assert(s->control_command);
 551         assert(s->control_command->command_next);
 552
 553         if (!success)
 554                 s->failure = true;
 555
 556         s->control_command = s->control_command->command_next;
 557
 558         if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 559                 goto fail;
 560
 561         return;
 562
 563 fail:
 564         if (s->state == SOCKET_STOP_PRE)
 565                 socket_enter_stop_post(s, false);
 566         else if (s->state == SOCKET_STOP_POST)
 567                 socket_enter_dead(s, false);
 568         else
 569                 socket_enter_stop_pre(s, false);
 570 }
 571
 572 static int socket_start(Unit *u) {
 573         Socket *s = SOCKET(u);
 574
 575         assert(s);
 576
 577         /* We cannot fulfill this request right now, try again later
 578          * please! */
 579         if (s->state == SOCKET_STOP_PRE ||
 580             s->state == SOCKET_STOP_PRE_SIGKILL ||
 581             s->state == SOCKET_STOP_PRE_SIGTERM ||
 582             s->state == SOCKET_STOP_POST ||
 583             s->state == SOCKET_STOP_POST_SIGTERM ||
 584             s->state == SOCKET_STOP_POST_SIGKILL)
 585                 return -EAGAIN;
 586
 587         if (s->state == SOCKET_START_PRE ||
 588             s->state == SOCKET_START_POST)
 589                 return 0;
 590
 591         /* Cannot run this without the service being around */
 592         if (s->service->meta.load_state != UNIT_LOADED)
 593                 return -ENOENT;
 594
 595         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
 596
 597         s->failure = false;
 598         socket_enter_start_pre(s);
 599         return 0;
 600 }
 601
 602 static int socket_stop(Unit *u) {
 603         Socket *s = SOCKET(u);
 604
 605         assert(s);
 606
 607         /* We cannot fulfill this request right now, try again later
 608          * please! */
 609         if (s->state == SOCKET_START_PRE ||
 610             s->state == SOCKET_START_POST)
 611                 return -EAGAIN;
 612
 613         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
 614
 615         socket_enter_stop_pre(s, true);
 616         return 0;
 617 }
 618
 619 static UnitActiveState socket_active_state(Unit *u) {
 620         assert(u);
 621
 622         return state_translation_table[SOCKET(u)->state];
 623 }
 624
 625 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
 626         Socket *s = SOCKET(u);
 627
 628         assert(s);
 629
 630         log_debug("Incoming traffic on %s", unit_id(u));
 631
 632         if (events != POLLIN)
 633                 socket_enter_stop_pre(s, false);
 634
 635         socket_enter_running(s);
 636 }
 637
 638 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 639         Socket *s = SOCKET(u);
 640         bool success;
 641
 642         assert(s);
 643         assert(pid >= 0);
 644
 645         success = code == CLD_EXITED && status == 0;
 646         s->failure = s->failure || !success;
 647
 648         assert(s->control_pid == pid);
 649         assert(s->control_command);
 650
 651         exec_status_fill(&s->control_command->exec_status, pid, code, status);
 652         s->control_pid = 0;
 653
 654         log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status);
 655
 656         if (s->control_command->command_next &&
 657             (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) {
 658                 log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
 659                 socket_run_next(s, success);
 660         } else {
 661                 /* No further commands for this step, so let's figure
 662                  * out what to do next */
 663
 664                 log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]);
 665
 666                 switch (s->state) {
 667
 668                 case SOCKET_START_PRE:
 669                         if (success)
 670                                 socket_enter_start_post(s);
 671                         else
 672                                 socket_enter_stop_pre(s, false);
 673                         break;
 674
 675                 case SOCKET_START_POST:
 676                         if (success)
 677                                 socket_enter_listening(s);
 678                         else
 679                                 socket_enter_stop_pre(s, false);
 680                         break;
 681
 682                 case SOCKET_STOP_PRE:
 683                 case SOCKET_STOP_PRE_SIGTERM:
 684                 case SOCKET_STOP_PRE_SIGKILL:
 685                         socket_enter_stop_post(s, success);
 686                         break;
 687
 688                 case SOCKET_STOP_POST:
 689                 case SOCKET_STOP_POST_SIGTERM:
 690                 case SOCKET_STOP_POST_SIGKILL:
 691                         socket_enter_dead(s, success);
 692                         break;
 693
 694                 default:
 695                         assert_not_reached("Uh, control process died at wrong time.");
 696                 }
 697         }
 698 }
 699
 700 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 701         Socket *s = SOCKET(u);
 702
 703         assert(s);
 704         assert(elapsed == 1);
 705
 706         assert(w == &s->timer_watch);
 707
 708         switch (s->state) {
 709
 710         case SOCKET_START_PRE:
 711         case SOCKET_START_POST:
 712                 log_warning("%s operation timed out. Stopping.", unit_id(u));
 713                 socket_enter_stop_pre(s, false);
 714                 break;
 715
 716         case SOCKET_STOP_PRE:
 717                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
 718                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
 719                 break;
 720
 721         case SOCKET_STOP_PRE_SIGTERM:
 722                 log_warning("%s stopping timed out. Killing.", unit_id(u));
 723                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
 724                 break;
 725
 726         case SOCKET_STOP_PRE_SIGKILL:
 727                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
 728                 socket_enter_stop_post(s, false);
 729                 break;
 730
 731         case SOCKET_STOP_POST:
 732                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
 733                 socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
 734                 break;
 735
 736         case SOCKET_STOP_POST_SIGTERM:
 737                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
 738                 socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
 739                 break;
 740
 741         case SOCKET_STOP_POST_SIGKILL:
 742                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
 743                 socket_enter_dead(s, false);
 744                 break;
 745
 746         default:
 747                 assert_not_reached("Timeout at wrong time.");
 748         }
 749 }
 750
 751 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
 752         int *rfds;
 753         unsigned rn_fds, k;
 754         SocketPort *p;
 755
 756         assert(s);
 757         assert(fds);
 758         assert(n_fds);
 759
 760         /* Called from the service code for requesting our fds */
 761
 762         rn_fds = 0;
 763         LIST_FOREACH(port, p, s->ports)
 764                 if (p->fd >= 0)
 765                         rn_fds++;
 766
 767         if (!(rfds = new(int, rn_fds)) < 0)
 768                 return -ENOMEM;
 769
 770         k = 0;
 771         LIST_FOREACH(port, p, s->ports)
 772                 if (p->fd >= 0)
 773                         rfds[k++] = p->fd;
 774
 775         assert(k == rn_fds);
 776
 777         *fds = rfds;
 778         *n_fds = rn_fds;
 779
 780         return 0;
 781 }
 782
 783 void socket_notify_service_dead(Socket *s) {
 784         assert(s);
 785
 786         /* The service is dead. Dang. */
 787
 788         if (s->state == SOCKET_RUNNING) {
 789                 log_debug("%s got notified about service death.", unit_id(UNIT(s)));
 790                 socket_enter_listening(s);
 791         }
 792 }
 793
 794 const UnitVTable socket_vtable = {
 795         .suffix = ".socket",
 796
 797         .init = socket_init,
 798         .done = socket_done,
 799
 800         .dump = socket_dump,
 801
 802         .start = socket_start,
 803         .stop = socket_stop,
 804
 805         .active_state = socket_active_state,
 806
 807         .fd_event = socket_fd_event,
 808         .sigchld_event = socket_sigchld_event,
 809         .timer_event = socket_timer_event
 810 };