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 "missing.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_MAINTENANCE
  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         s->max_connections = 64;
  68
  69         s->keep_alive = false;
  70         s->priority = -1;
  71         s->receive_buffer = 0;
  72         s->send_buffer = 0;
  73         s->ip_tos = -1;
  74         s->ip_ttl = -1;
  75         s->pipe_size = 0;
  76         s->mark = -1;
  77         s->free_bind = false;
  78
  79         exec_context_init(&s->exec_context);
  80
  81         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  82 }
  83
  84 static void socket_unwatch_control_pid(Socket *s) {
  85         assert(s);
  86
  87         if (s->control_pid <= 0)
  88                 return;
  89
  90         unit_unwatch_pid(UNIT(s), s->control_pid);
  91         s->control_pid = 0;
  92 }
  93
  94 static void socket_done(Unit *u) {
  95         Socket *s = SOCKET(u);
  96         SocketPort *p;
  97         Meta *i;
  98
  99         assert(s);
 100
 101         while ((p = s->ports)) {
 102                 LIST_REMOVE(SocketPort, port, s->ports, p);
 103
 104                 if (p->fd >= 0) {
 105                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 106                         close_nointr_nofail(p->fd);
 107                 }
 108
 109                 free(p->path);
 110                 free(p);
 111         }
 112
 113         exec_context_done(&s->exec_context);
 114         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 115         s->control_command = NULL;
 116
 117         socket_unwatch_control_pid(s);
 118
 119         s->service = NULL;
 120
 121         free(s->bind_to_device);
 122         s->bind_to_device = NULL;
 123
 124         unit_unwatch_timer(u, &s->timer_watch);
 125
 126         /* Make sure no service instance refers to us anymore. */
 127         LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
 128                 Service *service = (Service *) i;
 129
 130                 if (service->socket == s)
 131                         service->socket = NULL;
 132         }
 133 }
 134
 135 static bool have_non_accept_socket(Socket *s) {
 136         SocketPort *p;
 137
 138         assert(s);
 139
 140         if (!s->accept)
 141                 return true;
 142
 143         LIST_FOREACH(port, p, s->ports) {
 144
 145                 if (p->type != SOCKET_SOCKET)
 146                         return true;
 147
 148                 if (!socket_address_can_accept(&p->address))
 149                         return true;
 150         }
 151
 152         return false;
 153 }
 154
 155 static int socket_verify(Socket *s) {
 156         assert(s);
 157
 158         if (s->meta.load_state != UNIT_LOADED)
 159                 return 0;
 160
 161         if (!s->ports) {
 162                 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
 163                 return -EINVAL;
 164         }
 165
 166         if (s->accept && s->max_connections <= 0) {
 167                 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
 168                 return -EINVAL;
 169         }
 170
 171         if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
 172                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 173                 return -EINVAL;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static bool socket_needs_mount(Socket *s, const char *prefix) {
 180         SocketPort *p;
 181
 182         assert(s);
 183
 184         LIST_FOREACH(port, p, s->ports) {
 185
 186                 if (p->type == SOCKET_SOCKET) {
 187                         if (socket_address_needs_mount(&p->address, prefix))
 188                                 return true;
 189                 } else {
 190                         assert(p->type == SOCKET_FIFO);
 191                         if (path_startswith(p->path, prefix))
 192                                 return true;
 193                 }
 194         }
 195
 196         return false;
 197 }
 198
 199 int socket_add_one_mount_link(Socket *s, Mount *m) {
 200         int r;
 201
 202         assert(s);
 203         assert(m);
 204
 205         if (s->meta.load_state != UNIT_LOADED ||
 206             m->meta.load_state != UNIT_LOADED)
 207                 return 0;
 208
 209         if (!socket_needs_mount(s, m->where))
 210                 return 0;
 211
 212         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
 213                 return r;
 214
 215         if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
 216                 return r;
 217
 218         return 0;
 219 }
 220
 221 static int socket_add_mount_links(Socket *s) {
 222         Meta *other;
 223         int r;
 224
 225         assert(s);
 226
 227         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
 228                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 229                         return r;
 230
 231         return 0;
 232 }
 233
 234 static int socket_add_device_link(Socket *s) {
 235         char *t;
 236         int r;
 237
 238         assert(s);
 239
 240         if (!s->bind_to_device)
 241                 return 0;
 242
 243         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 244                 return -ENOMEM;
 245
 246         r = unit_add_node_link(UNIT(s), t, false);
 247         free(t);
 248
 249         return r;
 250 }
 251
 252 static int socket_load(Unit *u) {
 253         Socket *s = SOCKET(u);
 254         int r;
 255
 256         assert(u);
 257         assert(u->meta.load_state == UNIT_STUB);
 258
 259         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 260                 return r;
 261
 262         /* This is a new unit? Then let's add in some extras */
 263         if (u->meta.load_state == UNIT_LOADED) {
 264
 265                 if (have_non_accept_socket(s)) {
 266                         if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
 267                                 return r;
 268
 269                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
 270                                 return r;
 271                 }
 272
 273                 if ((r = socket_add_mount_links(s)) < 0)
 274                         return r;
 275
 276                 if ((r = socket_add_device_link(s)) < 0)
 277                         return r;
 278
 279                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 280                         return r;
 281
 282                 if ((r = unit_add_default_cgroup(u)) < 0)
 283                         return r;
 284         }
 285
 286         return socket_verify(s);
 287 }
 288
 289 static const char* listen_lookup(int type) {
 290
 291         if (type == SOCK_STREAM)
 292                 return "ListenStream";
 293         else if (type == SOCK_DGRAM)
 294                 return "ListenDatagram";
 295         else if (type == SOCK_SEQPACKET)
 296                 return "ListenSequentialPacket";
 297
 298         assert_not_reached("Unknown socket type");
 299         return NULL;
 300 }
 301
 302 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 303
 304         SocketExecCommand c;
 305         Socket *s = SOCKET(u);
 306         SocketPort *p;
 307         const char *prefix2;
 308         char *p2;
 309
 310         assert(s);
 311         assert(f);
 312
 313         p2 = strappend(prefix, "\t");
 314         prefix2 = p2 ? p2 : prefix;
 315
 316         fprintf(f,
 317                 "%sSocket State: %s\n"
 318                 "%sBindIPv6Only: %s\n"
 319                 "%sBacklog: %u\n"
 320                 "%sKillMode: %s\n"
 321                 "%sSocketMode: %04o\n"
 322                 "%sDirectoryMode: %04o\n"
 323                 "%sKeepAlive: %s\n"
 324                 "%sFreeBind: %s\n",
 325                 prefix, socket_state_to_string(s->state),
 326                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 327                 prefix, s->backlog,
 328                 prefix, kill_mode_to_string(s->kill_mode),
 329                 prefix, s->socket_mode,
 330                 prefix, s->directory_mode,
 331                 prefix, yes_no(s->keep_alive),
 332                 prefix, yes_no(s->free_bind));
 333
 334         if (s->control_pid > 0)
 335                 fprintf(f,
 336                         "%sControl PID: %lu\n",
 337                         prefix, (unsigned long) s->control_pid);
 338
 339         if (s->bind_to_device)
 340                 fprintf(f,
 341                         "%sBindToDevice: %s\n",
 342                         prefix, s->bind_to_device);
 343
 344         if (s->accept)
 345                 fprintf(f,
 346                         "%sAccepted: %u\n"
 347                         "%sNConnections: %u\n"
 348                         "%sMaxConnections: %u\n",
 349                         prefix, s->n_accepted,
 350                         prefix, s->n_connections,
 351                         prefix, s->max_connections);
 352
 353         if (s->priority >= 0)
 354                 fprintf(f,
 355                         "%sPriority: %i\n",
 356                         prefix, s->priority);
 357
 358         if (s->receive_buffer > 0)
 359                 fprintf(f,
 360                         "%sReceiveBuffer: %zu\n",
 361                         prefix, s->receive_buffer);
 362
 363         if (s->send_buffer > 0)
 364                 fprintf(f,
 365                         "%sSendBuffer: %zu\n",
 366                         prefix, s->send_buffer);
 367
 368         if (s->ip_tos >= 0)
 369                 fprintf(f,
 370                         "%sIPTOS: %i\n",
 371                         prefix, s->ip_tos);
 372
 373         if (s->ip_ttl >= 0)
 374                 fprintf(f,
 375                         "%sIPTTL: %i\n",
 376                         prefix, s->ip_ttl);
 377
 378         if (s->pipe_size > 0)
 379                 fprintf(f,
 380                         "%sPipeSize: %zu\n",
 381                         prefix, s->pipe_size);
 382
 383         if (s->mark >= 0)
 384                 fprintf(f,
 385                         "%sMark: %i\n",
 386                         prefix, s->mark);
 387
 388         LIST_FOREACH(port, p, s->ports) {
 389
 390                 if (p->type == SOCKET_SOCKET) {
 391                         const char *t;
 392                         int r;
 393                         char *k;
 394
 395                         if ((r = socket_address_print(&p->address, &k)) < 0)
 396                                 t = strerror(-r);
 397                         else
 398                                 t = k;
 399
 400                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 401                         free(k);
 402                 } else
 403                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 404         }
 405
 406         exec_context_dump(&s->exec_context, f, prefix);
 407
 408         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 409                 if (!s->exec_command[c])
 410                         continue;
 411
 412                 fprintf(f, "%s-> %s:\n",
 413                         prefix, socket_exec_command_to_string(c));
 414
 415                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 416         }
 417
 418         free(p2);
 419 }
 420
 421 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 422         socklen_t l;
 423         char *r;
 424         union {
 425                 struct sockaddr sa;
 426                 struct sockaddr_un un;
 427                 struct sockaddr_in in;
 428                 struct sockaddr_in6 in6;
 429                 struct sockaddr_storage storage;
 430         } local, remote;
 431
 432         assert(fd >= 0);
 433         assert(instance);
 434
 435         l = sizeof(local);
 436         if (getsockname(fd, &local.sa, &l) < 0)
 437                 return -errno;
 438
 439         l = sizeof(remote);
 440         if (getpeername(fd, &remote.sa, &l) < 0)
 441                 return -errno;
 442
 443         switch (local.sa.sa_family) {
 444
 445         case AF_INET: {
 446                 uint32_t
 447                         a = ntohl(local.in.sin_addr.s_addr),
 448                         b = ntohl(remote.in.sin_addr.s_addr);
 449
 450                 if (asprintf(&r,
 451                              "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 452                              nr,
 453                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 454                              ntohs(local.in.sin_port),
 455                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 456                              ntohs(remote.in.sin_port)) < 0)
 457                         return -ENOMEM;
 458
 459                 break;
 460         }
 461
 462         case AF_INET6: {
 463                 static const char ipv4_prefix[] = {
 464                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 465                 };
 466
 467                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 468                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 469                         const uint8_t
 470                                 *a = local.in6.sin6_addr.s6_addr+12,
 471                                 *b = remote.in6.sin6_addr.s6_addr+12;
 472
 473                         if (asprintf(&r,
 474                                      "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 475                                      nr,
 476                                      a[0], a[1], a[2], a[3],
 477                                      ntohs(local.in6.sin6_port),
 478                                      b[0], b[1], b[2], b[3],
 479                                      ntohs(remote.in6.sin6_port)) < 0)
 480                                 return -ENOMEM;
 481                 } else {
 482                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 483
 484                         if (asprintf(&r,
 485                                      "%u-%s:%u-%s:%u",
 486                                      nr,
 487                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 488                                      ntohs(local.in6.sin6_port),
 489                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 490                                      ntohs(remote.in6.sin6_port)) < 0)
 491                                 return -ENOMEM;
 492                 }
 493
 494                 break;
 495         }
 496
 497         case AF_UNIX: {
 498                 struct ucred ucred;
 499
 500                 l = sizeof(ucred);
 501                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 502                         return -errno;
 503
 504                 if (asprintf(&r,
 505                              "%u-%lu-%lu",
 506                              nr,
 507                              (unsigned long) ucred.pid,
 508                              (unsigned long) ucred.uid) < 0)
 509                         return -ENOMEM;
 510
 511                 break;
 512         }
 513
 514         default:
 515                 assert_not_reached("Unhandled socket type.");
 516         }
 517
 518         *instance = r;
 519         return 0;
 520 }
 521
 522 static void socket_close_fds(Socket *s) {
 523         SocketPort *p;
 524
 525         assert(s);
 526
 527         LIST_FOREACH(port, p, s->ports) {
 528                 if (p->fd < 0)
 529                         continue;
 530
 531                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 532                 close_nointr_nofail(p->fd);
 533
 534                 /* One little note: we should never delete any sockets
 535                  * in the file system here! After all some other
 536                  * process we spawned might still have a reference of
 537                  * this fd and wants to continue to use it. Therefore
 538                  * we delete sockets in the file system before we
 539                  * create a new one, not after we stopped using
 540                  * one! */
 541
 542                 p->fd = -1;
 543         }
 544 }
 545
 546 static void socket_apply_socket_options(Socket *s, int fd) {
 547         assert(s);
 548         assert(fd >= 0);
 549
 550         if (s->keep_alive) {
 551                 int b = s->keep_alive;
 552                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 553                         log_warning("SO_KEEPALIVE failed: %m");
 554         }
 555
 556         if (s->priority >= 0)
 557                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 558                         log_warning("SO_PRIORITY failed: %m");
 559
 560         if (s->receive_buffer > 0) {
 561                 int value = (int) s->receive_buffer;
 562                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
 563                         log_warning("SO_RCVBUF failed: %m");
 564         }
 565
 566         if (s->send_buffer > 0) {
 567                 int value = (int) s->send_buffer;
 568                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
 569                         log_warning("SO_SNDBUF failed: %m");
 570         }
 571
 572         if (s->mark >= 0)
 573                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 574                         log_warning("SO_MARK failed: %m");
 575
 576         if (s->ip_tos >= 0)
 577                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 578                         log_warning("IP_TOS failed: %m");
 579
 580         if (s->ip_ttl >= 0)
 581                 if (setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)) < 0)
 582                         log_warning("IP_TTL failed: %m");
 583 }
 584
 585 static void socket_apply_pipe_options(Socket *s, int fd) {
 586         assert(s);
 587         assert(fd >= 0);
 588
 589         if (s->pipe_size > 0)
 590                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 591                         log_warning("F_SETPIPE_SZ: %m");
 592 }
 593
 594 static int socket_open_fds(Socket *s) {
 595         SocketPort *p;
 596         int r;
 597
 598         assert(s);
 599
 600         LIST_FOREACH(port, p, s->ports) {
 601
 602                 if (p->fd >= 0)
 603                         continue;
 604
 605                 if (p->type == SOCKET_SOCKET) {
 606
 607                         if ((r = socket_address_listen(
 608                                              &p->address,
 609                                              s->backlog,
 610                                              s->bind_ipv6_only,
 611                                              s->bind_to_device,
 612                                              s->free_bind,
 613                                              s->directory_mode,
 614                                              s->socket_mode,
 615                                              &p->fd)) < 0)
 616                                 goto rollback;
 617
 618                         socket_apply_socket_options(s, p->fd);
 619
 620                 } else {
 621                         struct stat st;
 622                         assert(p->type == SOCKET_FIFO);
 623
 624                         mkdir_parents(p->path, s->directory_mode);
 625
 626                         if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
 627                                 r = -errno;
 628                                 goto rollback;
 629                         }
 630
 631                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 632                                 r = -errno;
 633                                 goto rollback;
 634                         }
 635
 636                         if (fstat(p->fd, &st) < 0) {
 637                                 r = -errno;
 638                                 goto rollback;
 639                         }
 640
 641                         /* FIXME verify user, access mode */
 642
 643                         if (!S_ISFIFO(st.st_mode)) {
 644                                 r = -EEXIST;
 645                                 goto rollback;
 646                         }
 647
 648                         socket_apply_pipe_options(s, p->fd);
 649                 }
 650         }
 651
 652         return 0;
 653
 654 rollback:
 655         socket_close_fds(s);
 656         return r;
 657 }
 658
 659 static void socket_unwatch_fds(Socket *s) {
 660         SocketPort *p;
 661
 662         assert(s);
 663
 664         LIST_FOREACH(port, p, s->ports) {
 665                 if (p->fd < 0)
 666                         continue;
 667
 668                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 669         }
 670 }
 671
 672 static int socket_watch_fds(Socket *s) {
 673         SocketPort *p;
 674         int r;
 675
 676         assert(s);
 677
 678         LIST_FOREACH(port, p, s->ports) {
 679                 if (p->fd < 0)
 680                         continue;
 681
 682                 p->fd_watch.socket_accept =
 683                         s->accept &&
 684                         p->type == SOCKET_SOCKET &&
 685                         socket_address_can_accept(&p->address);
 686
 687                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 688                         goto fail;
 689         }
 690
 691         return 0;
 692
 693 fail:
 694         socket_unwatch_fds(s);
 695         return r;
 696 }
 697
 698 static void socket_set_state(Socket *s, SocketState state) {
 699         SocketState old_state;
 700         assert(s);
 701
 702         old_state = s->state;
 703         s->state = state;
 704
 705         if (state != SOCKET_START_PRE &&
 706             state != SOCKET_START_POST &&
 707             state != SOCKET_STOP_PRE &&
 708             state != SOCKET_STOP_PRE_SIGTERM &&
 709             state != SOCKET_STOP_PRE_SIGKILL &&
 710             state != SOCKET_STOP_POST &&
 711             state != SOCKET_FINAL_SIGTERM &&
 712             state != SOCKET_FINAL_SIGKILL) {
 713                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 714                 socket_unwatch_control_pid(s);
 715                 s->control_command = NULL;
 716                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
 717         }
 718
 719         if (state != SOCKET_LISTENING)
 720                 socket_unwatch_fds(s);
 721
 722         if (state != SOCKET_START_POST &&
 723             state != SOCKET_LISTENING &&
 724             state != SOCKET_RUNNING &&
 725             state != SOCKET_STOP_PRE &&
 726             state != SOCKET_STOP_PRE_SIGTERM &&
 727             state != SOCKET_STOP_PRE_SIGKILL)
 728                 socket_close_fds(s);
 729
 730         if (state != old_state)
 731                 log_debug("%s changed %s -> %s",
 732                           s->meta.id,
 733                           socket_state_to_string(old_state),
 734                           socket_state_to_string(state));
 735
 736         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 737 }
 738
 739 static int socket_coldplug(Unit *u) {
 740         Socket *s = SOCKET(u);
 741         int r;
 742
 743         assert(s);
 744         assert(s->state == SOCKET_DEAD);
 745
 746         if (s->deserialized_state != s->state) {
 747
 748                 if (s->deserialized_state == SOCKET_START_PRE ||
 749                     s->deserialized_state == SOCKET_START_POST ||
 750                     s->deserialized_state == SOCKET_STOP_PRE ||
 751                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 752                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
 753                     s->deserialized_state == SOCKET_STOP_POST ||
 754                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
 755                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
 756
 757                         if (s->control_pid <= 0)
 758                                 return -EBADMSG;
 759
 760                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
 761                                 return r;
 762
 763                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 764                                 return r;
 765                 }
 766
 767                 if (s->deserialized_state == SOCKET_START_POST ||
 768                     s->deserialized_state == SOCKET_LISTENING ||
 769                     s->deserialized_state == SOCKET_RUNNING ||
 770                     s->deserialized_state == SOCKET_STOP_PRE ||
 771                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 772                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
 773                         if ((r = socket_open_fds(s)) < 0)
 774                                 return r;
 775
 776                 if (s->deserialized_state == SOCKET_LISTENING)
 777                         if ((r = socket_watch_fds(s)) < 0)
 778                                 return r;
 779
 780                 socket_set_state(s, s->deserialized_state);
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
 787         pid_t pid;
 788         int r;
 789         char **argv;
 790
 791         assert(s);
 792         assert(c);
 793         assert(_pid);
 794
 795         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 796                 goto fail;
 797
 798         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
 799                 r = -ENOMEM;
 800                 goto fail;
 801         }
 802
 803         r = exec_spawn(c,
 804                        argv,
 805                        &s->exec_context,
 806                        NULL, 0,
 807                        s->meta.manager->environment,
 808                        true,
 809                        true,
 810                        s->meta.manager->confirm_spawn,
 811                        s->meta.cgroup_bondings,
 812                        &pid);
 813
 814         strv_free(argv);
 815         if (r < 0)
 816                 goto fail;
 817
 818         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 819                 /* FIXME: we need to do something here */
 820                 goto fail;
 821
 822         *_pid = pid;
 823
 824         return 0;
 825
 826 fail:
 827         unit_unwatch_timer(UNIT(s), &s->timer_watch);
 828
 829         return r;
 830 }
 831
 832 static void socket_enter_dead(Socket *s, bool success) {
 833         assert(s);
 834
 835         if (!success)
 836                 s->failure = true;
 837
 838         socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
 839 }
 840
 841 static void socket_enter_signal(Socket *s, SocketState state, bool success);
 842
 843 static void socket_enter_stop_post(Socket *s, bool success) {
 844         int r;
 845         assert(s);
 846
 847         if (!success)
 848                 s->failure = true;
 849
 850         socket_unwatch_control_pid(s);
 851
 852         s->control_command_id = SOCKET_EXEC_STOP_POST;
 853
 854         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 855                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 856                         goto fail;
 857
 858                 socket_set_state(s, SOCKET_STOP_POST);
 859         } else
 860                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
 861
 862         return;
 863
 864 fail:
 865         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
 866         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
 867 }
 868
 869 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 870         int r;
 871         bool sent = false;
 872
 873         assert(s);
 874
 875         if (!success)
 876                 s->failure = true;
 877
 878         if (s->kill_mode != KILL_NONE) {
 879                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
 880
 881                 if (s->kill_mode == KILL_CONTROL_GROUP) {
 882
 883                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
 884                                 if (r != -EAGAIN && r != -ESRCH)
 885                                         goto fail;
 886                         } else
 887                                 sent = true;
 888                 }
 889
 890                 if (!sent && s->control_pid > 0)
 891                         if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
 892                                 r = -errno;
 893                                 goto fail;
 894                         }
 895         }
 896
 897         if (sent && s->control_pid > 0) {
 898                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 899                         goto fail;
 900
 901                 socket_set_state(s, state);
 902         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 903                 socket_enter_stop_post(s, true);
 904         else
 905                 socket_enter_dead(s, true);
 906
 907         return;
 908
 909 fail:
 910         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
 911
 912         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 913                 socket_enter_stop_post(s, false);
 914         else
 915                 socket_enter_dead(s, false);
 916 }
 917
 918 static void socket_enter_stop_pre(Socket *s, bool success) {
 919         int r;
 920         assert(s);
 921
 922         if (!success)
 923                 s->failure = true;
 924
 925         socket_unwatch_control_pid(s);
 926
 927         s->control_command_id = SOCKET_EXEC_STOP_PRE;
 928
 929         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 930                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 931                         goto fail;
 932
 933                 socket_set_state(s, SOCKET_STOP_PRE);
 934         } else
 935                 socket_enter_stop_post(s, true);
 936
 937         return;
 938
 939 fail:
 940         log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
 941         socket_enter_stop_post(s, false);
 942 }
 943
 944 static void socket_enter_listening(Socket *s) {
 945         int r;
 946         assert(s);
 947
 948         if ((r = socket_watch_fds(s)) < 0) {
 949                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
 950                 goto fail;
 951         }
 952
 953         socket_set_state(s, SOCKET_LISTENING);
 954         return;
 955
 956 fail:
 957         socket_enter_stop_pre(s, false);
 958 }
 959
 960 static void socket_enter_start_post(Socket *s) {
 961         int r;
 962         assert(s);
 963
 964         if ((r = socket_open_fds(s)) < 0) {
 965                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
 966                 goto fail;
 967         }
 968
 969         socket_unwatch_control_pid(s);
 970
 971         s->control_command_id = SOCKET_EXEC_START_POST;
 972
 973         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 974                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
 975                         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
 976                         goto fail;
 977                 }
 978
 979                 socket_set_state(s, SOCKET_START_POST);
 980         } else
 981                 socket_enter_listening(s);
 982
 983         return;
 984
 985 fail:
 986         socket_enter_stop_pre(s, false);
 987 }
 988
 989 static void socket_enter_start_pre(Socket *s) {
 990         int r;
 991         assert(s);
 992
 993         socket_unwatch_control_pid(s);
 994
 995         s->control_command_id = SOCKET_EXEC_START_PRE;
 996
 997         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
 998                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 999                         goto fail;
1000
1001                 socket_set_state(s, SOCKET_START_PRE);
1002         } else
1003                 socket_enter_start_post(s);
1004
1005         return;
1006
1007 fail:
1008         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1009         socket_enter_dead(s, false);
1010 }
1011
1012 static void socket_enter_running(Socket *s, int cfd) {
1013         int r;
1014
1015         assert(s);
1016
1017         if (cfd < 0) {
1018                 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1019                         goto fail;
1020
1021                 socket_set_state(s, SOCKET_RUNNING);
1022         } else {
1023                 Unit *u;
1024                 char *prefix, *instance, *name;
1025
1026                 if (s->n_connections >= s->max_connections) {
1027                         log_warning("Too many incoming connections (%u)", s->n_connections);
1028                         close_nointr_nofail(cfd);
1029                         return;
1030                 }
1031
1032                 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1033                         goto fail;
1034
1035                 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1036                         free(instance);
1037                         r = -ENOMEM;
1038                         goto fail;
1039                 }
1040
1041                 name = unit_name_build(prefix, instance, ".service");
1042                 free(prefix);
1043                 free(instance);
1044
1045                 if (!name) {
1046                         r = -ENOMEM;
1047                         goto fail;
1048                 }
1049
1050                 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1051                 free(name);
1052
1053                 if (r < 0)
1054                         goto fail;
1055
1056                 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1057                         goto fail;
1058
1059                 cfd = -1;
1060
1061                 s->n_connections ++;
1062
1063                 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1064                         goto fail;
1065         }
1066
1067         return;
1068
1069 fail:
1070         log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1071         socket_enter_stop_pre(s, false);
1072
1073         if (cfd >= 0)
1074                 close_nointr_nofail(cfd);
1075 }
1076
1077 static void socket_run_next(Socket *s, bool success) {
1078         int r;
1079
1080         assert(s);
1081         assert(s->control_command);
1082         assert(s->control_command->command_next);
1083
1084         if (!success)
1085                 s->failure = true;
1086
1087         socket_unwatch_control_pid(s);
1088
1089         s->control_command = s->control_command->command_next;
1090
1091         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1092                 goto fail;
1093
1094         return;
1095
1096 fail:
1097         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1098
1099         if (s->state == SOCKET_START_POST)
1100                 socket_enter_stop_pre(s, false);
1101         else if (s->state == SOCKET_STOP_POST)
1102                 socket_enter_dead(s, false);
1103         else
1104                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1105 }
1106
1107 static int socket_start(Unit *u) {
1108         Socket *s = SOCKET(u);
1109
1110         assert(s);
1111
1112         /* We cannot fulfill this request right now, try again later
1113          * please! */
1114         if (s->state == SOCKET_STOP_PRE ||
1115             s->state == SOCKET_STOP_PRE_SIGKILL ||
1116             s->state == SOCKET_STOP_PRE_SIGTERM ||
1117             s->state == SOCKET_STOP_POST ||
1118             s->state == SOCKET_FINAL_SIGTERM ||
1119             s->state == SOCKET_FINAL_SIGKILL)
1120                 return -EAGAIN;
1121
1122         if (s->state == SOCKET_START_PRE ||
1123             s->state == SOCKET_START_POST)
1124                 return 0;
1125
1126         /* Cannot run this without the service being around */
1127         if (s->service) {
1128                 if (s->service->meta.load_state != UNIT_LOADED)
1129                         return -ENOENT;
1130
1131                 /* If the service is alredy actvie we cannot start the
1132                  * socket */
1133                 if (s->service->state != SERVICE_DEAD &&
1134                     s->service->state != SERVICE_MAINTENANCE &&
1135                     s->service->state != SERVICE_AUTO_RESTART)
1136                         return -EBUSY;
1137         }
1138
1139         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1140
1141         s->failure = false;
1142         socket_enter_start_pre(s);
1143         return 0;
1144 }
1145
1146 static int socket_stop(Unit *u) {
1147         Socket *s = SOCKET(u);
1148
1149         assert(s);
1150
1151         /* We cannot fulfill this request right now, try again later
1152          * please! */
1153         if (s->state == SOCKET_START_PRE ||
1154             s->state == SOCKET_START_POST)
1155                 return -EAGAIN;
1156
1157         /* Already on it */
1158         if (s->state == SOCKET_STOP_PRE ||
1159             s->state == SOCKET_STOP_PRE_SIGTERM ||
1160             s->state == SOCKET_STOP_PRE_SIGKILL ||
1161             s->state == SOCKET_STOP_POST ||
1162             s->state == SOCKET_FINAL_SIGTERM ||
1163             s->state == SOCKET_FINAL_SIGTERM)
1164                 return 0;
1165
1166         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1167
1168         socket_enter_stop_pre(s, true);
1169         return 0;
1170 }
1171
1172 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1173         Socket *s = SOCKET(u);
1174         SocketPort *p;
1175         int r;
1176
1177         assert(u);
1178         assert(f);
1179         assert(fds);
1180
1181         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1182         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1183         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1184
1185         if (s->control_pid > 0)
1186                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1187
1188         if (s->control_command_id >= 0)
1189                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1190
1191         LIST_FOREACH(port, p, s->ports) {
1192                 int copy;
1193
1194                 if (p->fd < 0)
1195                         continue;
1196
1197                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1198                         return copy;
1199
1200                 if (p->type == SOCKET_SOCKET) {
1201                         char *t;
1202
1203                         if ((r = socket_address_print(&p->address, &t)) < 0)
1204                                 return r;
1205
1206                         unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1207                         free(t);
1208                 } else {
1209                         assert(p->type == SOCKET_FIFO);
1210                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1211                 }
1212         }
1213
1214         return 0;
1215 }
1216
1217 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1218         Socket *s = SOCKET(u);
1219         int r;
1220
1221         assert(u);
1222         assert(key);
1223         assert(value);
1224         assert(fds);
1225
1226         if (streq(key, "state")) {
1227                 SocketState state;
1228
1229                 if ((state = socket_state_from_string(value)) < 0)
1230                         log_debug("Failed to parse state value %s", value);
1231                 else
1232                         s->deserialized_state = state;
1233         } else if (streq(key, "failure")) {
1234                 int b;
1235
1236                 if ((b = parse_boolean(value)) < 0)
1237                         log_debug("Failed to parse failure value %s", value);
1238                 else
1239                         s->failure = b || s->failure;
1240
1241         } else if (streq(key, "n-accepted")) {
1242                 unsigned k;
1243
1244                 if ((r = safe_atou(value, &k)) < 0)
1245                         log_debug("Failed to parse n-accepted value %s", value);
1246                 else
1247                         s->n_accepted += k;
1248         } else if (streq(key, "control-pid")) {
1249                 pid_t pid;
1250
1251                 if ((r = parse_pid(value, &pid)) < 0)
1252                         log_debug("Failed to parse control-pid value %s", value);
1253                 else
1254                         s->control_pid = pid;
1255         } else if (streq(key, "control-command")) {
1256                 SocketExecCommand id;
1257
1258                 if ((id = socket_exec_command_from_string(value)) < 0)
1259                         log_debug("Failed to parse exec-command value %s", value);
1260                 else {
1261                         s->control_command_id = id;
1262                         s->control_command = s->exec_command[id];
1263                 }
1264         } else if (streq(key, "fifo")) {
1265                 int fd, skip = 0;
1266                 SocketPort *p;
1267
1268                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1269                         log_debug("Failed to parse fifo value %s", value);
1270                 else {
1271
1272                         LIST_FOREACH(port, p, s->ports)
1273                                 if (streq(p->path, value+skip))
1274                                         break;
1275
1276                         if (p) {
1277                                 if (p->fd >= 0)
1278                                         close_nointr_nofail(p->fd);
1279                                 p->fd = fdset_remove(fds, fd);
1280                         }
1281                 }
1282
1283         } else if (streq(key, "socket")) {
1284                 int fd, type, skip = 0;
1285                 SocketPort *p;
1286
1287                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1288                         log_debug("Failed to parse socket value %s", value);
1289                 else {
1290
1291                         LIST_FOREACH(port, p, s->ports)
1292                                 if (socket_address_is(&p->address, value+skip, type))
1293                                         break;
1294
1295                         if (p) {
1296                                 if (p->fd >= 0)
1297                                         close_nointr_nofail(p->fd);
1298                                 p->fd = fdset_remove(fds, fd);
1299                         }
1300                 }
1301
1302         } else
1303                 log_debug("Unknown serialization key '%s'", key);
1304
1305         return 0;
1306 }
1307
1308 static UnitActiveState socket_active_state(Unit *u) {
1309         assert(u);
1310
1311         return state_translation_table[SOCKET(u)->state];
1312 }
1313
1314 static const char *socket_sub_state_to_string(Unit *u) {
1315         assert(u);
1316
1317         return socket_state_to_string(SOCKET(u)->state);
1318 }
1319
1320 static bool socket_check_gc(Unit *u) {
1321         Socket *s = SOCKET(u);
1322
1323         assert(u);
1324
1325         return s->n_connections > 0;
1326 }
1327
1328 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1329         Socket *s = SOCKET(u);
1330         int cfd = -1;
1331
1332         assert(s);
1333         assert(fd >= 0);
1334
1335         if (s->state != SOCKET_LISTENING)
1336                 return;
1337
1338         log_debug("Incoming traffic on %s", u->meta.id);
1339
1340         if (events != EPOLLIN) {
1341                 log_error("Got invalid poll event on socket.");
1342                 goto fail;
1343         }
1344
1345         if (w->socket_accept) {
1346                 for (;;) {
1347
1348                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1349
1350                                 if (errno == EINTR)
1351                                         continue;
1352
1353                                 log_error("Failed to accept socket: %m");
1354                                 goto fail;
1355                         }
1356
1357                         break;
1358                 }
1359
1360                 socket_apply_socket_options(s, cfd);
1361         }
1362
1363         socket_enter_running(s, cfd);
1364         return;
1365
1366 fail:
1367         socket_enter_stop_pre(s, false);
1368 }
1369
1370 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1371         Socket *s = SOCKET(u);
1372         bool success;
1373
1374         assert(s);
1375         assert(pid >= 0);
1376
1377         if (pid != s->control_pid)
1378                 return;
1379
1380         s->control_pid = 0;
1381
1382         success = is_clean_exit(code, status);
1383         s->failure = s->failure || !success;
1384
1385         if (s->control_command)
1386                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1387
1388         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1389
1390         if (s->control_command && s->control_command->command_next && success) {
1391                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1392                 socket_run_next(s, success);
1393         } else {
1394                 s->control_command = NULL;
1395                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1396
1397                 /* No further commands for this step, so let's figure
1398                  * out what to do next */
1399
1400                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1401
1402                 switch (s->state) {
1403
1404                 case SOCKET_START_PRE:
1405                         if (success)
1406                                 socket_enter_start_post(s);
1407                         else
1408                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1409                         break;
1410
1411                 case SOCKET_START_POST:
1412                         if (success)
1413                                 socket_enter_listening(s);
1414                         else
1415                                 socket_enter_stop_pre(s, false);
1416                         break;
1417
1418                 case SOCKET_STOP_PRE:
1419                 case SOCKET_STOP_PRE_SIGTERM:
1420                 case SOCKET_STOP_PRE_SIGKILL:
1421                         socket_enter_stop_post(s, success);
1422                         break;
1423
1424                 case SOCKET_STOP_POST:
1425                 case SOCKET_FINAL_SIGTERM:
1426                 case SOCKET_FINAL_SIGKILL:
1427                         socket_enter_dead(s, success);
1428                         break;
1429
1430                 default:
1431                         assert_not_reached("Uh, control process died at wrong time.");
1432                 }
1433         }
1434 }
1435
1436 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1437         Socket *s = SOCKET(u);
1438
1439         assert(s);
1440         assert(elapsed == 1);
1441         assert(w == &s->timer_watch);
1442
1443         switch (s->state) {
1444
1445         case SOCKET_START_PRE:
1446                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1447                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1448
1449         case SOCKET_START_POST:
1450                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1451                 socket_enter_stop_pre(s, false);
1452                 break;
1453
1454         case SOCKET_STOP_PRE:
1455                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1456                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1457                 break;
1458
1459         case SOCKET_STOP_PRE_SIGTERM:
1460                 log_warning("%s stopping timed out. Killing.", u->meta.id);
1461                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1462                 break;
1463
1464         case SOCKET_STOP_PRE_SIGKILL:
1465                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1466                 socket_enter_stop_post(s, false);
1467                 break;
1468
1469         case SOCKET_STOP_POST:
1470                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1471                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1472                 break;
1473
1474         case SOCKET_FINAL_SIGTERM:
1475                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1476                 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1477                 break;
1478
1479         case SOCKET_FINAL_SIGKILL:
1480                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1481                 socket_enter_dead(s, false);
1482                 break;
1483
1484         default:
1485                 assert_not_reached("Timeout at wrong time.");
1486         }
1487 }
1488
1489 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1490         int *rfds;
1491         unsigned rn_fds, k;
1492         SocketPort *p;
1493
1494         assert(s);
1495         assert(fds);
1496         assert(n_fds);
1497
1498         /* Called from the service code for requesting our fds */
1499
1500         rn_fds = 0;
1501         LIST_FOREACH(port, p, s->ports)
1502                 if (p->fd >= 0)
1503                         rn_fds++;
1504
1505         if (!(rfds = new(int, rn_fds)) < 0)
1506                 return -ENOMEM;
1507
1508         k = 0;
1509         LIST_FOREACH(port, p, s->ports)
1510                 if (p->fd >= 0)
1511                         rfds[k++] = p->fd;
1512
1513         assert(k == rn_fds);
1514
1515         *fds = rfds;
1516         *n_fds = rn_fds;
1517
1518         return 0;
1519 }
1520
1521 void socket_notify_service_dead(Socket *s) {
1522         assert(s);
1523
1524         /* The service is dead. Dang!
1525          *
1526          * This is strictly for one-instance-for-all-connections
1527          * services. */
1528
1529         if (s->state == SOCKET_RUNNING) {
1530                 log_debug("%s got notified about service death.", s->meta.id);
1531                 socket_enter_listening(s);
1532         }
1533 }
1534
1535 void socket_connection_unref(Socket *s) {
1536         assert(s);
1537
1538         /* The service is dead. Yay!
1539          *
1540          * This is strictly for one-onstance-per-connection
1541          * services. */
1542
1543         assert(s->n_connections > 0);
1544         s->n_connections--;
1545
1546         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1547 }
1548
1549 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1550         [SOCKET_DEAD] = "dead",
1551         [SOCKET_START_PRE] = "start-pre",
1552         [SOCKET_START_POST] = "start-post",
1553         [SOCKET_LISTENING] = "listening",
1554         [SOCKET_RUNNING] = "running",
1555         [SOCKET_STOP_PRE] = "stop-pre",
1556         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1557         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1558         [SOCKET_STOP_POST] = "stop-post",
1559         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1560         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1561         [SOCKET_MAINTENANCE] = "maintenance"
1562 };
1563
1564 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1565
1566 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1567         [SOCKET_EXEC_START_PRE] = "StartPre",
1568         [SOCKET_EXEC_START_POST] = "StartPost",
1569         [SOCKET_EXEC_STOP_PRE] = "StopPre",
1570         [SOCKET_EXEC_STOP_POST] = "StopPost"
1571 };
1572
1573 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1574
1575 const UnitVTable socket_vtable = {
1576         .suffix = ".socket",
1577
1578         .init = socket_init,
1579         .done = socket_done,
1580         .load = socket_load,
1581
1582         .coldplug = socket_coldplug,
1583
1584         .dump = socket_dump,
1585
1586         .start = socket_start,
1587         .stop = socket_stop,
1588
1589         .serialize = socket_serialize,
1590         .deserialize_item = socket_deserialize_item,
1591
1592         .active_state = socket_active_state,
1593         .sub_state_to_string = socket_sub_state_to_string,
1594
1595         .check_gc = socket_check_gc,
1596
1597         .fd_event = socket_fd_event,
1598         .sigchld_event = socket_sigchld_event,
1599         .timer_event = socket_timer_event,
1600
1601         .bus_message_handler = bus_socket_message_handler
1602 };