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
  30 #include "unit.h"
  31 #include "socket.h"
  32 #include "log.h"
  33
  34 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  35         [SOCKET_DEAD] = UNIT_INACTIVE,
  36         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  37         [SOCKET_START_POST] = UNIT_ACTIVATING,
  38         [SOCKET_LISTENING] = UNIT_ACTIVE,
  39         [SOCKET_RUNNING] = UNIT_ACTIVE,
  40         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  41         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  42         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  43         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  44         [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING,
  45         [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING,
  46         [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
  47 };
  48
  49 static const char* const state_string_table[_SOCKET_STATE_MAX] = {
  50         [SOCKET_DEAD] = "dead",
  51         [SOCKET_START_PRE] = "start-pre",
  52         [SOCKET_START_POST] = "start-post",
  53         [SOCKET_LISTENING] = "listening",
  54         [SOCKET_RUNNING] = "running",
  55         [SOCKET_STOP_PRE] = "stop-pre",
  56         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
  57         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
  58         [SOCKET_STOP_POST] = "stop-post",
  59         [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm",
  60         [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill",
  61         [SOCKET_MAINTAINANCE] = "maintainance"
  62 };
  63
  64 static void socket_done(Unit *u) {
  65         Socket *s = SOCKET(u);
  66         SocketPort *p;
  67
  68         assert(s);
  69
  70         while ((p = s->ports)) {
  71                 LIST_REMOVE(SocketPort, port, s->ports, p);
  72
  73                 if (p->fd >= 0)
  74                         close_nointr(p->fd);
  75                 free(p->path);
  76                 free(p);
  77         }
  78
  79         exec_context_done(&s->exec_context);
  80         exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX);
  81         s->control_command = NULL;
  82
  83         if (s->control_pid > 0) {
  84                 unit_unwatch_pid(u, s->control_pid);
  85                 s->control_pid = 0;
  86         }
  87
  88         s->service = NULL;
  89
  90         free(s->bind_to_device);
  91
  92         unit_unwatch_timer(u, &s->timer_watch);
  93 }
  94
  95 static int socket_init(Unit *u) {
  96         Socket *s = SOCKET(u);
  97         char *t;
  98         int r;
  99
 100         /* First, reset everything to the defaults, in case this is a
 101          * reload */
 102
 103         s->state = 0;
 104         s->timer_watch.type = WATCH_INVALID;
 105         s->bind_ipv6_only = false;
 106         s->backlog = SOMAXCONN;
 107         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 108         exec_context_init(&s->exec_context);
 109
 110         if ((r = unit_load_fragment_and_dropin(u)) <= 0) {
 111                 if (r == 0)
 112                         r = -ENOENT;
 113                 goto fail;
 114         }
 115
 116         if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) {
 117                 r = -ENOMEM;
 118                 goto fail;
 119         }
 120
 121         r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service);
 122         free(t);
 123
 124         if (r < 0)
 125                 goto fail;
 126
 127         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0)
 128                 goto fail;
 129
 130         return 0;
 131
 132 fail:
 133         socket_done(u);
 134         return r;
 135 }
 136
 137 static const char* listen_lookup(int type) {
 138
 139         if (type == SOCK_STREAM)
 140                 return "ListenStream";
 141         else if (type == SOCK_DGRAM)
 142                 return "ListenDatagram";
 143         else if (type == SOCK_SEQPACKET)
 144                 return "ListenSequentialPacket";
 145
 146         assert_not_reached("Unknown socket type");
 147         return NULL;
 148 }
 149
 150 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 151
 152         static const char* const command_table[_SOCKET_EXEC_MAX] = {
 153                 [SOCKET_EXEC_START_PRE] = "StartPre",
 154                 [SOCKET_EXEC_START_POST] = "StartPost",
 155                 [SOCKET_EXEC_STOP_PRE] = "StopPre",
 156                 [SOCKET_EXEC_STOP_POST] = "StopPost"
 157         };
 158
 159         SocketExecCommand c;
 160         Socket *s = SOCKET(u);
 161         SocketPort *p;
 162         const char *prefix2;
 163         char *p2;
 164
 165         assert(s);
 166         assert(f);
 167
 168         p2 = strappend(prefix, "\t");
 169         prefix2 = p2 ? p2 : prefix;
 170
 171         fprintf(f,
 172                 "%sSocket State: %s\n"
 173                 "%sBindIPv6Only: %s\n"
 174                 "%sBacklog: %u\n",
 175                 prefix, state_string_table[s->state],
 176                 prefix, yes_no(s->bind_ipv6_only),
 177                 prefix, s->backlog);
 178
 179         if (s->bind_to_device)
 180                 fprintf(f,
 181                         "%sBindToDevice: %s\n",
 182                         prefix, s->bind_to_device);
 183
 184         LIST_FOREACH(port, p, s->ports) {
 185
 186                 if (p->type == SOCKET_SOCKET) {
 187                         const char *t;
 188                         int r;
 189                         char *k;
 190
 191                         if ((r = socket_address_print(&p->address, &k)) < 0)
 192                                 t = strerror(-r);
 193                         else
 194                                 t = k;
 195
 196                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 197                         free(k);
 198                 } else
 199                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 200         }
 201
 202         exec_context_dump(&s->exec_context, f, prefix);
 203
 204         for (c = 0; c < _SOCKET_EXEC_MAX; c++) {
 205                 if (!s->exec_command[c])
 206                         continue;
 207
 208                 fprintf(f, "%s→ %s:\n",
 209                         prefix, command_table[c]);
 210
 211                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 212         }
 213
 214         free(p2);
 215 }
 216
 217 static void socket_close_fds(Socket *s) {
 218         SocketPort *p;
 219
 220         assert(s);
 221
 222         LIST_FOREACH(port, p, s->ports) {
 223                 if (p->fd < 0)
 224                         continue;
 225
 226                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 227                 assert_se(close_nointr(p->fd) >= 0);
 228
 229                 p->fd = -1;
 230         }
 231 }
 232
 233 static int socket_open_fds(Socket *s) {
 234         SocketPort *p;
 235         int r;
 236
 237         assert(s);
 238
 239         LIST_FOREACH(port, p, s->ports) {
 240
 241                 if (p->fd >= 0)
 242                         continue;
 243
 244                 if (p->type == SOCKET_SOCKET) {
 245
 246                         if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0)
 247                                 goto rollback;
 248
 249                 } else {
 250                         struct stat st;
 251                         assert(p->type == SOCKET_FIFO);
 252
 253                         if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) {
 254                                 r = -errno;
 255                                 goto rollback;
 256                         }
 257
 258                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 259                                 r = -errno;
 260                                 goto rollback;
 261                         }
 262
 263                         if (fstat(p->fd, &st) < 0) {
 264                                 r = -errno;
 265                                 goto rollback;
 266                         }
 267
 268                         /* FIXME verify user, access mode */
 269
 270                         if (!S_ISFIFO(st.st_mode)) {
 271                                 r = -EEXIST;
 272                                 goto rollback;
 273                         }
 274                 }
 275         }
 276
 277         return 0;
 278
 279 rollback:
 280         socket_close_fds(s);
 281         return r;
 282 }
 283
 284 static void socket_unwatch_fds(Socket *s) {
 285         SocketPort *p;
 286
 287         assert(s);
 288
 289         LIST_FOREACH(port, p, s->ports) {
 290                 if (p->fd < 0)
 291                         continue;
 292
 293                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 294         }
 295 }
 296
 297 static int socket_watch_fds(Socket *s) {
 298         SocketPort *p;
 299         int r;
 300
 301         assert(s);
 302
 303         LIST_FOREACH(port, p, s->ports) {
 304                 if (p->fd < 0)
 305                         continue;
 306
 307                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 308                         goto fail;
 309         }
 310
 311         return 0;
 312
 313 fail:
 314         socket_unwatch_fds(s);
 315         return r;
 316 }
 317
 318 static void socket_set_state(Socket *s, SocketState state) {
 319         SocketState old_state;
 320         assert(s);
 321
 322         old_state = s->state;
 323         s->state = state;
 324
 325         if (state != SOCKET_START_PRE &&
 326             state != SOCKET_START_POST &&
 327             state != SOCKET_STOP_PRE &&
 328             state != SOCKET_STOP_PRE_SIGTERM &&
 329             state != SOCKET_STOP_PRE_SIGKILL &&
 330             state != SOCKET_STOP_POST &&
 331             state != SOCKET_STOP_POST_SIGTERM &&
 332             state != SOCKET_STOP_POST_SIGKILL)
 333                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 334
 335         if (state != SOCKET_START_PRE &&
 336             state != SOCKET_START_POST &&
 337             state != SOCKET_STOP_PRE &&
 338             state != SOCKET_STOP_PRE_SIGTERM &&
 339             state != SOCKET_STOP_PRE_SIGKILL &&
 340             state != SOCKET_STOP_POST &&
 341             state != SOCKET_STOP_POST_SIGTERM &&
 342             state != SOCKET_STOP_POST_SIGKILL)
 343                 if (s->control_pid > 0) {
 344                         unit_unwatch_pid(UNIT(s), s->control_pid);
 345                         s->control_pid = 0;
 346                 }
 347
 348         if (state != SOCKET_START_PRE &&
 349             state != SOCKET_START_POST &&
 350             state != SOCKET_STOP_PRE &&
 351             state != SOCKET_STOP_POST)
 352                 s->control_command = NULL;
 353
 354         if (state != SOCKET_START_POST &&
 355             state != SOCKET_LISTENING &&
 356             state != SOCKET_RUNNING &&
 357             state != SOCKET_STOP_PRE &&
 358             state != SOCKET_STOP_PRE_SIGTERM &&
 359             state != SOCKET_STOP_PRE_SIGKILL)
 360                 socket_close_fds(s);
 361
 362         if (state != SOCKET_LISTENING)
 363                 socket_unwatch_fds(s);
 364
 365         log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
 366
 367         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 368 }
 369
 370 static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
 371         pid_t pid;
 372         int r;
 373
 374         assert(s);
 375         assert(c);
 376         assert(_pid);
 377
 378         if (timeout) {
 379                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 380                         goto fail;
 381         } else
 382                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 383
 384         if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0)
 385                 goto fail;
 386
 387         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 388                 /* FIXME: we need to do something here */
 389                 goto fail;
 390
 391         *_pid = pid;
 392
 393         return 0;
 394
 395 fail:
 396         if (timeout)
 397                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 398
 399         return r;
 400 }
 401
 402 static void socket_enter_dead(Socket *s, bool success) {
 403         assert(s);
 404
 405         if (!success)
 406                 s->failure = true;
 407
 408         socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
 409 }
 410
 411 static void socket_enter_stop_post(Socket *s, bool success) {
 412         int r;
 413         assert(s);
 414
 415         if (!success)
 416                 s->failure = true;
 417
 418         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]))
 419                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 420                         goto fail;
 421
 422         socket_set_state(s, SOCKET_STOP_POST);
 423
 424         if (!s->control_command)
 425                 socket_enter_dead(s, true);
 426
 427         return;
 428
 429 fail:
 430         log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 431         socket_enter_dead(s, false);
 432 }
 433
 434 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 435         int r;
 436
 437         assert(s);
 438
 439         if (!success)
 440                 s->failure = true;
 441
 442         if (s->control_pid > 0) {
 443                 int sig;
 444
 445                 sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
 446
 447                 if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
 448                         r = -errno;
 449                         goto fail;
 450                 }
 451         }
 452
 453         socket_set_state(s, state);
 454
 455         if (s->control_pid <= 0)
 456                 socket_enter_dead(s, true);
 457
 458         return;
 459
 460 fail:
 461         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
 462
 463         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 464                 socket_enter_stop_post(s, false);
 465         else
 466                 socket_enter_dead(s, false);
 467 }
 468
 469 static void socket_enter_stop_pre(Socket *s, bool success) {
 470         int r;
 471         assert(s);
 472
 473         if (!success)
 474                 s->failure = true;
 475
 476         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]))
 477                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 478                         goto fail;
 479
 480         socket_set_state(s, SOCKET_STOP_PRE);
 481
 482         if (!s->control_command)
 483                 socket_enter_stop_post(s, true);
 484
 485         return;
 486
 487 fail:
 488         log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
 489         socket_enter_stop_post(s, false);
 490 }
 491
 492 static void socket_enter_listening(Socket *s) {
 493         int r;
 494         assert(s);
 495
 496         if ((r = socket_watch_fds(s)) < 0) {
 497                 log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r));
 498                 goto fail;
 499         }
 500
 501         socket_set_state(s, SOCKET_LISTENING);
 502         return;
 503
 504 fail:
 505         socket_enter_stop_pre(s, false);
 506 }
 507
 508 static void socket_enter_start_post(Socket *s) {
 509         int r;
 510         assert(s);
 511
 512         if ((r = socket_open_fds(s)) < 0) {
 513                 log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
 514                 goto fail;
 515         }
 516
 517         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST]))
 518                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
 519                         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 520                         goto fail;
 521                 }
 522
 523         socket_set_state(s, SOCKET_START_POST);
 524
 525         if (!s->control_command)
 526                 socket_enter_listening(s);
 527
 528         return;
 529
 530 fail:
 531         socket_enter_stop_pre(s, false);
 532 }
 533
 534 static void socket_enter_start_pre(Socket *s) {
 535         int r;
 536         assert(s);
 537
 538         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]))
 539                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 540                         goto fail;
 541
 542         socket_set_state(s, SOCKET_START_PRE);
 543
 544         if (!s->control_command)
 545                 socket_enter_start_post(s);
 546
 547         return;
 548
 549 fail:
 550         log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
 551         socket_enter_dead(s, false);
 552 }
 553
 554 static void socket_enter_running(Socket *s) {
 555         int r;
 556
 557         assert(s);
 558
 559         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
 560                 goto fail;
 561
 562         socket_set_state(s, SOCKET_RUNNING);
 563         return;
 564
 565 fail:
 566         log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
 567         socket_enter_dead(s, false);
 568 }
 569
 570 static void socket_run_next(Socket *s, bool success) {
 571         int r;
 572
 573         assert(s);
 574         assert(s->control_command);
 575         assert(s->control_command->command_next);
 576
 577         if (!success)
 578                 s->failure = true;
 579
 580         s->control_command = s->control_command->command_next;
 581
 582         if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 583                 goto fail;
 584
 585         return;
 586
 587 fail:
 588         if (s->state == SOCKET_STOP_PRE)
 589                 socket_enter_stop_post(s, false);
 590         else if (s->state == SOCKET_STOP_POST)
 591                 socket_enter_dead(s, false);
 592         else
 593                 socket_enter_stop_pre(s, false);
 594 }
 595
 596 static int socket_start(Unit *u) {
 597         Socket *s = SOCKET(u);
 598
 599         assert(s);
 600
 601         /* We cannot fulfill this request right now, try again later
 602          * please! */
 603         if (s->state == SOCKET_STOP_PRE ||
 604             s->state == SOCKET_STOP_PRE_SIGKILL ||
 605             s->state == SOCKET_STOP_PRE_SIGTERM ||
 606             s->state == SOCKET_STOP_POST ||
 607             s->state == SOCKET_STOP_POST_SIGTERM ||
 608             s->state == SOCKET_STOP_POST_SIGKILL)
 609                 return -EAGAIN;
 610
 611         if (s->state == SOCKET_START_PRE ||
 612             s->state == SOCKET_START_POST)
 613                 return 0;
 614
 615         /* Cannot run this without the service being around */
 616         if (s->service->meta.load_state != UNIT_LOADED)
 617                 return -ENOENT;
 618
 619         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
 620
 621         s->failure = false;
 622         socket_enter_start_pre(s);
 623         return 0;
 624 }
 625
 626 static int socket_stop(Unit *u) {
 627         Socket *s = SOCKET(u);
 628
 629         assert(s);
 630
 631         /* We cannot fulfill this request right now, try again later
 632          * please! */
 633         if (s->state == SOCKET_START_PRE ||
 634             s->state == SOCKET_START_POST)
 635                 return -EAGAIN;
 636
 637         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
 638
 639         socket_enter_stop_pre(s, true);
 640         return 0;
 641 }
 642
 643 static UnitActiveState socket_active_state(Unit *u) {
 644         assert(u);
 645
 646         return state_translation_table[SOCKET(u)->state];
 647 }
 648
 649 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
 650         Socket *s = SOCKET(u);
 651
 652         assert(s);
 653
 654         log_debug("Incoming traffic on %s", unit_id(u));
 655
 656         if (events != EPOLLIN)
 657                 socket_enter_stop_pre(s, false);
 658
 659         socket_enter_running(s);
 660 }
 661
 662 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 663         Socket *s = SOCKET(u);
 664         bool success;
 665
 666         assert(s);
 667         assert(pid >= 0);
 668
 669         success = code == CLD_EXITED && status == 0;
 670         s->failure = s->failure || !success;
 671
 672         assert(s->control_pid == pid);
 673         assert(s->control_command);
 674
 675         exec_status_fill(&s->control_command->exec_status, pid, code, status);
 676         s->control_pid = 0;
 677
 678         log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
 679
 680         if (s->control_command->command_next &&
 681             (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) {
 682                 log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
 683                 socket_run_next(s, success);
 684         } else {
 685                 /* No further commands for this step, so let's figure
 686                  * out what to do next */
 687
 688                 log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]);
 689
 690                 switch (s->state) {
 691
 692                 case SOCKET_START_PRE:
 693                         if (success)
 694                                 socket_enter_start_post(s);
 695                         else
 696                                 socket_enter_stop_pre(s, false);
 697                         break;
 698
 699                 case SOCKET_START_POST:
 700                         if (success)
 701                                 socket_enter_listening(s);
 702                         else
 703                                 socket_enter_stop_pre(s, false);
 704                         break;
 705
 706                 case SOCKET_STOP_PRE:
 707                 case SOCKET_STOP_PRE_SIGTERM:
 708                 case SOCKET_STOP_PRE_SIGKILL:
 709                         socket_enter_stop_post(s, success);
 710                         break;
 711
 712                 case SOCKET_STOP_POST:
 713                 case SOCKET_STOP_POST_SIGTERM:
 714                 case SOCKET_STOP_POST_SIGKILL:
 715                         socket_enter_dead(s, success);
 716                         break;
 717
 718                 default:
 719                         assert_not_reached("Uh, control process died at wrong time.");
 720                 }
 721         }
 722 }
 723
 724 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 725         Socket *s = SOCKET(u);
 726
 727         assert(s);
 728         assert(elapsed == 1);
 729
 730         assert(w == &s->timer_watch);
 731
 732         switch (s->state) {
 733
 734         case SOCKET_START_PRE:
 735         case SOCKET_START_POST:
 736                 log_warning("%s operation timed out. Stopping.", unit_id(u));
 737                 socket_enter_stop_pre(s, false);
 738                 break;
 739
 740         case SOCKET_STOP_PRE:
 741                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
 742                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
 743                 break;
 744
 745         case SOCKET_STOP_PRE_SIGTERM:
 746                 log_warning("%s stopping timed out. Killing.", unit_id(u));
 747                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
 748                 break;
 749
 750         case SOCKET_STOP_PRE_SIGKILL:
 751                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
 752                 socket_enter_stop_post(s, false);
 753                 break;
 754
 755         case SOCKET_STOP_POST:
 756                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
 757                 socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
 758                 break;
 759
 760         case SOCKET_STOP_POST_SIGTERM:
 761                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
 762                 socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
 763                 break;
 764
 765         case SOCKET_STOP_POST_SIGKILL:
 766                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
 767                 socket_enter_dead(s, false);
 768                 break;
 769
 770         default:
 771                 assert_not_reached("Timeout at wrong time.");
 772         }
 773 }
 774
 775 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
 776         int *rfds;
 777         unsigned rn_fds, k;
 778         SocketPort *p;
 779
 780         assert(s);
 781         assert(fds);
 782         assert(n_fds);
 783
 784         /* Called from the service code for requesting our fds */
 785
 786         rn_fds = 0;
 787         LIST_FOREACH(port, p, s->ports)
 788                 if (p->fd >= 0)
 789                         rn_fds++;
 790
 791         if (!(rfds = new(int, rn_fds)) < 0)
 792                 return -ENOMEM;
 793
 794         k = 0;
 795         LIST_FOREACH(port, p, s->ports)
 796                 if (p->fd >= 0)
 797                         rfds[k++] = p->fd;
 798
 799         assert(k == rn_fds);
 800
 801         *fds = rfds;
 802         *n_fds = rn_fds;
 803
 804         return 0;
 805 }
 806
 807 void socket_notify_service_dead(Socket *s) {
 808         assert(s);
 809
 810         /* The service is dead. Dang. */
 811
 812         if (s->state == SOCKET_RUNNING) {
 813                 log_debug("%s got notified about service death.", unit_id(UNIT(s)));
 814                 socket_enter_listening(s);
 815         }
 816 }
 817
 818 const UnitVTable socket_vtable = {
 819         .suffix = ".socket",
 820
 821         .init = socket_init,
 822         .done = socket_done,
 823
 824         .dump = socket_dump,
 825
 826         .start = socket_start,
 827         .stop = socket_stop,
 828
 829         .active_state = socket_active_state,
 830
 831         .fd_event = socket_fd_event,
 832         .sigchld_event = socket_sigchld_event,
 833         .timer_event = socket_timer_event
 834 };