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->priority = -1;
  70         s->ip_tos = -1;
  71         s->ip_ttl = -1;
  72         s->mark = -1;
  73
  74         exec_context_init(&s->exec_context);
  75
  76         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  77 }
  78
  79 static void socket_unwatch_control_pid(Socket *s) {
  80         assert(s);
  81
  82         if (s->control_pid <= 0)
  83                 return;
  84
  85         unit_unwatch_pid(UNIT(s), s->control_pid);
  86         s->control_pid = 0;
  87 }
  88
  89 static void socket_done(Unit *u) {
  90         Socket *s = SOCKET(u);
  91         SocketPort *p;
  92         Meta *i;
  93
  94         assert(s);
  95
  96         while ((p = s->ports)) {
  97                 LIST_REMOVE(SocketPort, port, s->ports, p);
  98
  99                 if (p->fd >= 0) {
 100                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 101                         close_nointr_nofail(p->fd);
 102                 }
 103
 104                 free(p->path);
 105                 free(p);
 106         }
 107
 108         exec_context_done(&s->exec_context);
 109         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 110         s->control_command = NULL;
 111
 112         socket_unwatch_control_pid(s);
 113
 114         s->service = NULL;
 115
 116         free(s->bind_to_device);
 117         s->bind_to_device = NULL;
 118
 119         unit_unwatch_timer(u, &s->timer_watch);
 120
 121         /* Make sure no service instance refers to us anymore. */
 122         LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
 123                 Service *service = (Service *) i;
 124
 125                 if (service->socket == s)
 126                         service->socket = NULL;
 127         }
 128 }
 129
 130 static bool have_non_accept_socket(Socket *s) {
 131         SocketPort *p;
 132
 133         assert(s);
 134
 135         if (!s->accept)
 136                 return true;
 137
 138         LIST_FOREACH(port, p, s->ports) {
 139
 140                 if (p->type != SOCKET_SOCKET)
 141                         return true;
 142
 143                 if (!socket_address_can_accept(&p->address))
 144                         return true;
 145         }
 146
 147         return false;
 148 }
 149
 150 static int socket_verify(Socket *s) {
 151         assert(s);
 152
 153         if (s->meta.load_state != UNIT_LOADED)
 154                 return 0;
 155
 156         if (!s->ports) {
 157                 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
 158                 return -EINVAL;
 159         }
 160
 161         if (s->accept && s->max_connections <= 0) {
 162                 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
 163                 return -EINVAL;
 164         }
 165
 166         if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
 167                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 168                 return -EINVAL;
 169         }
 170
 171         return 0;
 172 }
 173
 174 static bool socket_needs_mount(Socket *s, const char *prefix) {
 175         SocketPort *p;
 176
 177         assert(s);
 178
 179         LIST_FOREACH(port, p, s->ports) {
 180
 181                 if (p->type == SOCKET_SOCKET) {
 182                         if (socket_address_needs_mount(&p->address, prefix))
 183                                 return true;
 184                 } else {
 185                         assert(p->type == SOCKET_FIFO);
 186                         if (path_startswith(p->path, prefix))
 187                                 return true;
 188                 }
 189         }
 190
 191         return false;
 192 }
 193
 194 int socket_add_one_mount_link(Socket *s, Mount *m) {
 195         int r;
 196
 197         assert(s);
 198         assert(m);
 199
 200         if (s->meta.load_state != UNIT_LOADED ||
 201             m->meta.load_state != UNIT_LOADED)
 202                 return 0;
 203
 204         if (!socket_needs_mount(s, m->where))
 205                 return 0;
 206
 207         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
 208                 return r;
 209
 210         if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
 211                 return r;
 212
 213         return 0;
 214 }
 215
 216 static int socket_add_mount_links(Socket *s) {
 217         Meta *other;
 218         int r;
 219
 220         assert(s);
 221
 222         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
 223                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 224                         return r;
 225
 226         return 0;
 227 }
 228
 229 static int socket_add_device_link(Socket *s) {
 230         char *t;
 231         int r;
 232
 233         assert(s);
 234
 235         if (!s->bind_to_device)
 236                 return 0;
 237
 238         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 239                 return -ENOMEM;
 240
 241         r = unit_add_node_link(UNIT(s), t, false);
 242         free(t);
 243
 244         return r;
 245 }
 246
 247 static int socket_load(Unit *u) {
 248         Socket *s = SOCKET(u);
 249         int r;
 250
 251         assert(u);
 252         assert(u->meta.load_state == UNIT_STUB);
 253
 254         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 255                 return r;
 256
 257         /* This is a new unit? Then let's add in some extras */
 258         if (u->meta.load_state == UNIT_LOADED) {
 259
 260                 if (have_non_accept_socket(s)) {
 261                         if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
 262                                 return r;
 263
 264                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
 265                                 return r;
 266                 }
 267
 268                 if ((r = socket_add_mount_links(s)) < 0)
 269                         return r;
 270
 271                 if ((r = socket_add_device_link(s)) < 0)
 272                         return r;
 273
 274                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 275                         return r;
 276
 277                 if ((r = unit_add_default_cgroup(u)) < 0)
 278                         return r;
 279         }
 280
 281         return socket_verify(s);
 282 }
 283
 284 static const char* listen_lookup(int type) {
 285
 286         if (type == SOCK_STREAM)
 287                 return "ListenStream";
 288         else if (type == SOCK_DGRAM)
 289                 return "ListenDatagram";
 290         else if (type == SOCK_SEQPACKET)
 291                 return "ListenSequentialPacket";
 292
 293         assert_not_reached("Unknown socket type");
 294         return NULL;
 295 }
 296
 297 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 298
 299         SocketExecCommand c;
 300         Socket *s = SOCKET(u);
 301         SocketPort *p;
 302         const char *prefix2;
 303         char *p2;
 304
 305         assert(s);
 306         assert(f);
 307
 308         p2 = strappend(prefix, "\t");
 309         prefix2 = p2 ? p2 : prefix;
 310
 311         fprintf(f,
 312                 "%sSocket State: %s\n"
 313                 "%sBindIPv6Only: %s\n"
 314                 "%sBacklog: %u\n"
 315                 "%sKillMode: %s\n"
 316                 "%sSocketMode: %04o\n"
 317                 "%sDirectoryMode: %04o\n"
 318                 "%sKeepAlive: %s\n"
 319                 "%sFreeBind: %s\n",
 320                 prefix, socket_state_to_string(s->state),
 321                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 322                 prefix, s->backlog,
 323                 prefix, kill_mode_to_string(s->kill_mode),
 324                 prefix, s->socket_mode,
 325                 prefix, s->directory_mode,
 326                 prefix, yes_no(s->keep_alive),
 327                 prefix, yes_no(s->free_bind));
 328
 329         if (s->control_pid > 0)
 330                 fprintf(f,
 331                         "%sControl PID: %lu\n",
 332                         prefix, (unsigned long) s->control_pid);
 333
 334         if (s->bind_to_device)
 335                 fprintf(f,
 336                         "%sBindToDevice: %s\n",
 337                         prefix, s->bind_to_device);
 338
 339         if (s->accept)
 340                 fprintf(f,
 341                         "%sAccepted: %u\n"
 342                         "%sNConnections: %u\n"
 343                         "%sMaxConnections: %u\n",
 344                         prefix, s->n_accepted,
 345                         prefix, s->n_connections,
 346                         prefix, s->max_connections);
 347
 348         if (s->priority >= 0)
 349                 fprintf(f,
 350                         "%sPriority: %i\n",
 351                         prefix, s->priority);
 352
 353         if (s->receive_buffer > 0)
 354                 fprintf(f,
 355                         "%sReceiveBuffer: %zu\n",
 356                         prefix, s->receive_buffer);
 357
 358         if (s->send_buffer > 0)
 359                 fprintf(f,
 360                         "%sSendBuffer: %zu\n",
 361                         prefix, s->send_buffer);
 362
 363         if (s->ip_tos >= 0)
 364                 fprintf(f,
 365                         "%sIPTOS: %i\n",
 366                         prefix, s->ip_tos);
 367
 368         if (s->ip_ttl >= 0)
 369                 fprintf(f,
 370                         "%sIPTTL: %i\n",
 371                         prefix, s->ip_ttl);
 372
 373         if (s->pipe_size > 0)
 374                 fprintf(f,
 375                         "%sPipeSize: %zu\n",
 376                         prefix, s->pipe_size);
 377
 378         if (s->mark >= 0)
 379                 fprintf(f,
 380                         "%sMark: %i\n",
 381                         prefix, s->mark);
 382
 383         LIST_FOREACH(port, p, s->ports) {
 384
 385                 if (p->type == SOCKET_SOCKET) {
 386                         const char *t;
 387                         int r;
 388                         char *k;
 389
 390                         if ((r = socket_address_print(&p->address, &k)) < 0)
 391                                 t = strerror(-r);
 392                         else
 393                                 t = k;
 394
 395                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 396                         free(k);
 397                 } else
 398                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 399         }
 400
 401         exec_context_dump(&s->exec_context, f, prefix);
 402
 403         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 404                 if (!s->exec_command[c])
 405                         continue;
 406
 407                 fprintf(f, "%s-> %s:\n",
 408                         prefix, socket_exec_command_to_string(c));
 409
 410                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 411         }
 412
 413         free(p2);
 414 }
 415
 416 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 417         socklen_t l;
 418         char *r;
 419         union {
 420                 struct sockaddr sa;
 421                 struct sockaddr_un un;
 422                 struct sockaddr_in in;
 423                 struct sockaddr_in6 in6;
 424                 struct sockaddr_storage storage;
 425         } local, remote;
 426
 427         assert(fd >= 0);
 428         assert(instance);
 429
 430         l = sizeof(local);
 431         if (getsockname(fd, &local.sa, &l) < 0)
 432                 return -errno;
 433
 434         l = sizeof(remote);
 435         if (getpeername(fd, &remote.sa, &l) < 0)
 436                 return -errno;
 437
 438         switch (local.sa.sa_family) {
 439
 440         case AF_INET: {
 441                 uint32_t
 442                         a = ntohl(local.in.sin_addr.s_addr),
 443                         b = ntohl(remote.in.sin_addr.s_addr);
 444
 445                 if (asprintf(&r,
 446                              "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 447                              nr,
 448                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 449                              ntohs(local.in.sin_port),
 450                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 451                              ntohs(remote.in.sin_port)) < 0)
 452                         return -ENOMEM;
 453
 454                 break;
 455         }
 456
 457         case AF_INET6: {
 458                 static const char ipv4_prefix[] = {
 459                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 460                 };
 461
 462                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 463                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 464                         const uint8_t
 465                                 *a = local.in6.sin6_addr.s6_addr+12,
 466                                 *b = remote.in6.sin6_addr.s6_addr+12;
 467
 468                         if (asprintf(&r,
 469                                      "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 470                                      nr,
 471                                      a[0], a[1], a[2], a[3],
 472                                      ntohs(local.in6.sin6_port),
 473                                      b[0], b[1], b[2], b[3],
 474                                      ntohs(remote.in6.sin6_port)) < 0)
 475                                 return -ENOMEM;
 476                 } else {
 477                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 478
 479                         if (asprintf(&r,
 480                                      "%u-%s:%u-%s:%u",
 481                                      nr,
 482                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 483                                      ntohs(local.in6.sin6_port),
 484                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 485                                      ntohs(remote.in6.sin6_port)) < 0)
 486                                 return -ENOMEM;
 487                 }
 488
 489                 break;
 490         }
 491
 492         case AF_UNIX: {
 493                 struct ucred ucred;
 494
 495                 l = sizeof(ucred);
 496                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 497                         return -errno;
 498
 499                 if (asprintf(&r,
 500                              "%u-%lu-%lu",
 501                              nr,
 502                              (unsigned long) ucred.pid,
 503                              (unsigned long) ucred.uid) < 0)
 504                         return -ENOMEM;
 505
 506                 break;
 507         }
 508
 509         default:
 510                 assert_not_reached("Unhandled socket type.");
 511         }
 512
 513         *instance = r;
 514         return 0;
 515 }
 516
 517 static void socket_close_fds(Socket *s) {
 518         SocketPort *p;
 519
 520         assert(s);
 521
 522         LIST_FOREACH(port, p, s->ports) {
 523                 if (p->fd < 0)
 524                         continue;
 525
 526                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 527                 close_nointr_nofail(p->fd);
 528
 529                 /* One little note: we should never delete any sockets
 530                  * in the file system here! After all some other
 531                  * process we spawned might still have a reference of
 532                  * this fd and wants to continue to use it. Therefore
 533                  * we delete sockets in the file system before we
 534                  * create a new one, not after we stopped using
 535                  * one! */
 536
 537                 p->fd = -1;
 538         }
 539 }
 540
 541 static void socket_apply_socket_options(Socket *s, int fd) {
 542         assert(s);
 543         assert(fd >= 0);
 544
 545         if (s->keep_alive) {
 546                 int b = s->keep_alive;
 547                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 548                         log_warning("SO_KEEPALIVE failed: %m");
 549         }
 550
 551         if (s->priority >= 0)
 552                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 553                         log_warning("SO_PRIORITY failed: %m");
 554
 555         if (s->receive_buffer > 0) {
 556                 int value = (int) s->receive_buffer;
 557                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
 558                         log_warning("SO_RCVBUF failed: %m");
 559         }
 560
 561         if (s->send_buffer > 0) {
 562                 int value = (int) s->send_buffer;
 563                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
 564                         log_warning("SO_SNDBUF failed: %m");
 565         }
 566
 567         if (s->mark >= 0)
 568                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 569                         log_warning("SO_MARK failed: %m");
 570
 571         if (s->ip_tos >= 0)
 572                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 573                         log_warning("IP_TOS failed: %m");
 574
 575         if (s->ip_ttl >= 0) {
 576                 int r, x;
 577
 578                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
 579                 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
 580
 581                 if (r < 0 && x < 0)
 582                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
 583         }
 584 }
 585
 586 static void socket_apply_pipe_options(Socket *s, int fd) {
 587         assert(s);
 588         assert(fd >= 0);
 589
 590         if (s->pipe_size > 0)
 591                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 592                         log_warning("F_SETPIPE_SZ: %m");
 593 }
 594
 595 static int socket_open_fds(Socket *s) {
 596         SocketPort *p;
 597         int r;
 598
 599         assert(s);
 600
 601         LIST_FOREACH(port, p, s->ports) {
 602
 603                 if (p->fd >= 0)
 604                         continue;
 605
 606                 if (p->type == SOCKET_SOCKET) {
 607
 608                         if ((r = socket_address_listen(
 609                                              &p->address,
 610                                              s->backlog,
 611                                              s->bind_ipv6_only,
 612                                              s->bind_to_device,
 613                                              s->free_bind,
 614                                              s->directory_mode,
 615                                              s->socket_mode,
 616                                              &p->fd)) < 0)
 617                                 goto rollback;
 618
 619                         socket_apply_socket_options(s, p->fd);
 620
 621                 } else {
 622                         struct stat st;
 623                         assert(p->type == SOCKET_FIFO);
 624
 625                         mkdir_parents(p->path, s->directory_mode);
 626
 627                         if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
 628                                 r = -errno;
 629                                 goto rollback;
 630                         }
 631
 632                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 633                                 r = -errno;
 634                                 goto rollback;
 635                         }
 636
 637                         if (fstat(p->fd, &st) < 0) {
 638                                 r = -errno;
 639                                 goto rollback;
 640                         }
 641
 642                         /* FIXME verify user, access mode */
 643
 644                         if (!S_ISFIFO(st.st_mode)) {
 645                                 r = -EEXIST;
 646                                 goto rollback;
 647                         }
 648
 649                         socket_apply_pipe_options(s, p->fd);
 650                 }
 651         }
 652
 653         return 0;
 654
 655 rollback:
 656         socket_close_fds(s);
 657         return r;
 658 }
 659
 660 static void socket_unwatch_fds(Socket *s) {
 661         SocketPort *p;
 662
 663         assert(s);
 664
 665         LIST_FOREACH(port, p, s->ports) {
 666                 if (p->fd < 0)
 667                         continue;
 668
 669                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 670         }
 671 }
 672
 673 static int socket_watch_fds(Socket *s) {
 674         SocketPort *p;
 675         int r;
 676
 677         assert(s);
 678
 679         LIST_FOREACH(port, p, s->ports) {
 680                 if (p->fd < 0)
 681                         continue;
 682
 683                 p->fd_watch.socket_accept =
 684                         s->accept &&
 685                         p->type == SOCKET_SOCKET &&
 686                         socket_address_can_accept(&p->address);
 687
 688                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 689                         goto fail;
 690         }
 691
 692         return 0;
 693
 694 fail:
 695         socket_unwatch_fds(s);
 696         return r;
 697 }
 698
 699 static void socket_set_state(Socket *s, SocketState state) {
 700         SocketState old_state;
 701         assert(s);
 702
 703         old_state = s->state;
 704         s->state = state;
 705
 706         if (state != SOCKET_START_PRE &&
 707             state != SOCKET_START_POST &&
 708             state != SOCKET_STOP_PRE &&
 709             state != SOCKET_STOP_PRE_SIGTERM &&
 710             state != SOCKET_STOP_PRE_SIGKILL &&
 711             state != SOCKET_STOP_POST &&
 712             state != SOCKET_FINAL_SIGTERM &&
 713             state != SOCKET_FINAL_SIGKILL) {
 714                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 715                 socket_unwatch_control_pid(s);
 716                 s->control_command = NULL;
 717                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
 718         }
 719
 720         if (state != SOCKET_LISTENING)
 721                 socket_unwatch_fds(s);
 722
 723         if (state != SOCKET_START_POST &&
 724             state != SOCKET_LISTENING &&
 725             state != SOCKET_RUNNING &&
 726             state != SOCKET_STOP_PRE &&
 727             state != SOCKET_STOP_PRE_SIGTERM &&
 728             state != SOCKET_STOP_PRE_SIGKILL)
 729                 socket_close_fds(s);
 730
 731         if (state != old_state)
 732                 log_debug("%s changed %s -> %s",
 733                           s->meta.id,
 734                           socket_state_to_string(old_state),
 735                           socket_state_to_string(state));
 736
 737         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 738 }
 739
 740 static int socket_coldplug(Unit *u) {
 741         Socket *s = SOCKET(u);
 742         int r;
 743
 744         assert(s);
 745         assert(s->state == SOCKET_DEAD);
 746
 747         if (s->deserialized_state != s->state) {
 748
 749                 if (s->deserialized_state == SOCKET_START_PRE ||
 750                     s->deserialized_state == SOCKET_START_POST ||
 751                     s->deserialized_state == SOCKET_STOP_PRE ||
 752                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 753                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
 754                     s->deserialized_state == SOCKET_STOP_POST ||
 755                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
 756                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
 757
 758                         if (s->control_pid <= 0)
 759                                 return -EBADMSG;
 760
 761                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
 762                                 return r;
 763
 764                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 765                                 return r;
 766                 }
 767
 768                 if (s->deserialized_state == SOCKET_START_POST ||
 769                     s->deserialized_state == SOCKET_LISTENING ||
 770                     s->deserialized_state == SOCKET_RUNNING ||
 771                     s->deserialized_state == SOCKET_STOP_PRE ||
 772                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 773                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
 774                         if ((r = socket_open_fds(s)) < 0)
 775                                 return r;
 776
 777                 if (s->deserialized_state == SOCKET_LISTENING)
 778                         if ((r = socket_watch_fds(s)) < 0)
 779                                 return r;
 780
 781                 socket_set_state(s, s->deserialized_state);
 782         }
 783
 784         return 0;
 785 }
 786
 787 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
 788         pid_t pid;
 789         int r;
 790         char **argv;
 791
 792         assert(s);
 793         assert(c);
 794         assert(_pid);
 795
 796         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 797                 goto fail;
 798
 799         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
 800                 r = -ENOMEM;
 801                 goto fail;
 802         }
 803
 804         r = exec_spawn(c,
 805                        argv,
 806                        &s->exec_context,
 807                        NULL, 0,
 808                        s->meta.manager->environment,
 809                        true,
 810                        true,
 811                        s->meta.manager->confirm_spawn,
 812                        s->meta.cgroup_bondings,
 813                        &pid);
 814
 815         strv_free(argv);
 816         if (r < 0)
 817                 goto fail;
 818
 819         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 820                 /* FIXME: we need to do something here */
 821                 goto fail;
 822
 823         *_pid = pid;
 824
 825         return 0;
 826
 827 fail:
 828         unit_unwatch_timer(UNIT(s), &s->timer_watch);
 829
 830         return r;
 831 }
 832
 833 static void socket_enter_dead(Socket *s, bool success) {
 834         assert(s);
 835
 836         if (!success)
 837                 s->failure = true;
 838
 839         socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
 840 }
 841
 842 static void socket_enter_signal(Socket *s, SocketState state, bool success);
 843
 844 static void socket_enter_stop_post(Socket *s, bool success) {
 845         int r;
 846         assert(s);
 847
 848         if (!success)
 849                 s->failure = true;
 850
 851         socket_unwatch_control_pid(s);
 852
 853         s->control_command_id = SOCKET_EXEC_STOP_POST;
 854
 855         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 856                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 857                         goto fail;
 858
 859                 socket_set_state(s, SOCKET_STOP_POST);
 860         } else
 861                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
 862
 863         return;
 864
 865 fail:
 866         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
 867         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
 868 }
 869
 870 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 871         int r;
 872         bool sent = false;
 873
 874         assert(s);
 875
 876         if (!success)
 877                 s->failure = true;
 878
 879         if (s->kill_mode != KILL_NONE) {
 880                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
 881
 882                 if (s->kill_mode == KILL_CONTROL_GROUP) {
 883
 884                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
 885                                 if (r != -EAGAIN && r != -ESRCH)
 886                                         goto fail;
 887                         } else
 888                                 sent = true;
 889                 }
 890
 891                 if (!sent && s->control_pid > 0)
 892                         if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
 893                                 r = -errno;
 894                                 goto fail;
 895                         }
 896         }
 897
 898         if (sent && s->control_pid > 0) {
 899                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 900                         goto fail;
 901
 902                 socket_set_state(s, state);
 903         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 904                 socket_enter_stop_post(s, true);
 905         else
 906                 socket_enter_dead(s, true);
 907
 908         return;
 909
 910 fail:
 911         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
 912
 913         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 914                 socket_enter_stop_post(s, false);
 915         else
 916                 socket_enter_dead(s, false);
 917 }
 918
 919 static void socket_enter_stop_pre(Socket *s, bool success) {
 920         int r;
 921         assert(s);
 922
 923         if (!success)
 924                 s->failure = true;
 925
 926         socket_unwatch_control_pid(s);
 927
 928         s->control_command_id = SOCKET_EXEC_STOP_PRE;
 929
 930         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 931                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 932                         goto fail;
 933
 934                 socket_set_state(s, SOCKET_STOP_PRE);
 935         } else
 936                 socket_enter_stop_post(s, true);
 937
 938         return;
 939
 940 fail:
 941         log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
 942         socket_enter_stop_post(s, false);
 943 }
 944
 945 static void socket_enter_listening(Socket *s) {
 946         int r;
 947         assert(s);
 948
 949         if ((r = socket_watch_fds(s)) < 0) {
 950                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
 951                 goto fail;
 952         }
 953
 954         socket_set_state(s, SOCKET_LISTENING);
 955         return;
 956
 957 fail:
 958         socket_enter_stop_pre(s, false);
 959 }
 960
 961 static void socket_enter_start_post(Socket *s) {
 962         int r;
 963         assert(s);
 964
 965         if ((r = socket_open_fds(s)) < 0) {
 966                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
 967                 goto fail;
 968         }
 969
 970         socket_unwatch_control_pid(s);
 971
 972         s->control_command_id = SOCKET_EXEC_START_POST;
 973
 974         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 975                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
 976                         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
 977                         goto fail;
 978                 }
 979
 980                 socket_set_state(s, SOCKET_START_POST);
 981         } else
 982                 socket_enter_listening(s);
 983
 984         return;
 985
 986 fail:
 987         socket_enter_stop_pre(s, false);
 988 }
 989
 990 static void socket_enter_start_pre(Socket *s) {
 991         int r;
 992         assert(s);
 993
 994         socket_unwatch_control_pid(s);
 995
 996         s->control_command_id = SOCKET_EXEC_START_PRE;
 997
 998         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
 999                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1000                         goto fail;
1001
1002                 socket_set_state(s, SOCKET_START_PRE);
1003         } else
1004                 socket_enter_start_post(s);
1005
1006         return;
1007
1008 fail:
1009         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1010         socket_enter_dead(s, false);
1011 }
1012
1013 static void socket_enter_running(Socket *s, int cfd) {
1014         int r;
1015
1016         assert(s);
1017
1018         if (cfd < 0) {
1019                 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1020                         goto fail;
1021
1022                 socket_set_state(s, SOCKET_RUNNING);
1023         } else {
1024                 Unit *u;
1025                 char *prefix, *instance, *name;
1026
1027                 if (s->n_connections >= s->max_connections) {
1028                         log_warning("Too many incoming connections (%u)", s->n_connections);
1029                         close_nointr_nofail(cfd);
1030                         return;
1031                 }
1032
1033                 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1034                         goto fail;
1035
1036                 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1037                         free(instance);
1038                         r = -ENOMEM;
1039                         goto fail;
1040                 }
1041
1042                 name = unit_name_build(prefix, instance, ".service");
1043                 free(prefix);
1044                 free(instance);
1045
1046                 if (!name) {
1047                         r = -ENOMEM;
1048                         goto fail;
1049                 }
1050
1051                 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1052                 free(name);
1053
1054                 if (r < 0)
1055                         goto fail;
1056
1057                 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1058                         goto fail;
1059
1060                 cfd = -1;
1061
1062                 s->n_connections ++;
1063
1064                 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1065                         goto fail;
1066         }
1067
1068         return;
1069
1070 fail:
1071         log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1072         socket_enter_stop_pre(s, false);
1073
1074         if (cfd >= 0)
1075                 close_nointr_nofail(cfd);
1076 }
1077
1078 static void socket_run_next(Socket *s, bool success) {
1079         int r;
1080
1081         assert(s);
1082         assert(s->control_command);
1083         assert(s->control_command->command_next);
1084
1085         if (!success)
1086                 s->failure = true;
1087
1088         socket_unwatch_control_pid(s);
1089
1090         s->control_command = s->control_command->command_next;
1091
1092         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1093                 goto fail;
1094
1095         return;
1096
1097 fail:
1098         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1099
1100         if (s->state == SOCKET_START_POST)
1101                 socket_enter_stop_pre(s, false);
1102         else if (s->state == SOCKET_STOP_POST)
1103                 socket_enter_dead(s, false);
1104         else
1105                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1106 }
1107
1108 static int socket_start(Unit *u) {
1109         Socket *s = SOCKET(u);
1110
1111         assert(s);
1112
1113         /* We cannot fulfill this request right now, try again later
1114          * please! */
1115         if (s->state == SOCKET_STOP_PRE ||
1116             s->state == SOCKET_STOP_PRE_SIGKILL ||
1117             s->state == SOCKET_STOP_PRE_SIGTERM ||
1118             s->state == SOCKET_STOP_POST ||
1119             s->state == SOCKET_FINAL_SIGTERM ||
1120             s->state == SOCKET_FINAL_SIGKILL)
1121                 return -EAGAIN;
1122
1123         if (s->state == SOCKET_START_PRE ||
1124             s->state == SOCKET_START_POST)
1125                 return 0;
1126
1127         /* Cannot run this without the service being around */
1128         if (s->service) {
1129                 if (s->service->meta.load_state != UNIT_LOADED)
1130                         return -ENOENT;
1131
1132                 /* If the service is alredy actvie we cannot start the
1133                  * socket */
1134                 if (s->service->state != SERVICE_DEAD &&
1135                     s->service->state != SERVICE_MAINTENANCE &&
1136                     s->service->state != SERVICE_AUTO_RESTART)
1137                         return -EBUSY;
1138         }
1139
1140         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1141
1142         s->failure = false;
1143         socket_enter_start_pre(s);
1144         return 0;
1145 }
1146
1147 static int socket_stop(Unit *u) {
1148         Socket *s = SOCKET(u);
1149
1150         assert(s);
1151
1152         /* We cannot fulfill this request right now, try again later
1153          * please! */
1154         if (s->state == SOCKET_START_PRE ||
1155             s->state == SOCKET_START_POST)
1156                 return -EAGAIN;
1157
1158         /* Already on it */
1159         if (s->state == SOCKET_STOP_PRE ||
1160             s->state == SOCKET_STOP_PRE_SIGTERM ||
1161             s->state == SOCKET_STOP_PRE_SIGKILL ||
1162             s->state == SOCKET_STOP_POST ||
1163             s->state == SOCKET_FINAL_SIGTERM ||
1164             s->state == SOCKET_FINAL_SIGTERM)
1165                 return 0;
1166
1167         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1168
1169         socket_enter_stop_pre(s, true);
1170         return 0;
1171 }
1172
1173 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1174         Socket *s = SOCKET(u);
1175         SocketPort *p;
1176         int r;
1177
1178         assert(u);
1179         assert(f);
1180         assert(fds);
1181
1182         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1183         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1184         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1185
1186         if (s->control_pid > 0)
1187                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1188
1189         if (s->control_command_id >= 0)
1190                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1191
1192         LIST_FOREACH(port, p, s->ports) {
1193                 int copy;
1194
1195                 if (p->fd < 0)
1196                         continue;
1197
1198                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1199                         return copy;
1200
1201                 if (p->type == SOCKET_SOCKET) {
1202                         char *t;
1203
1204                         if ((r = socket_address_print(&p->address, &t)) < 0)
1205                                 return r;
1206
1207                         unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1208                         free(t);
1209                 } else {
1210                         assert(p->type == SOCKET_FIFO);
1211                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1212                 }
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1219         Socket *s = SOCKET(u);
1220         int r;
1221
1222         assert(u);
1223         assert(key);
1224         assert(value);
1225         assert(fds);
1226
1227         if (streq(key, "state")) {
1228                 SocketState state;
1229
1230                 if ((state = socket_state_from_string(value)) < 0)
1231                         log_debug("Failed to parse state value %s", value);
1232                 else
1233                         s->deserialized_state = state;
1234         } else if (streq(key, "failure")) {
1235                 int b;
1236
1237                 if ((b = parse_boolean(value)) < 0)
1238                         log_debug("Failed to parse failure value %s", value);
1239                 else
1240                         s->failure = b || s->failure;
1241
1242         } else if (streq(key, "n-accepted")) {
1243                 unsigned k;
1244
1245                 if ((r = safe_atou(value, &k)) < 0)
1246                         log_debug("Failed to parse n-accepted value %s", value);
1247                 else
1248                         s->n_accepted += k;
1249         } else if (streq(key, "control-pid")) {
1250                 pid_t pid;
1251
1252                 if ((r = parse_pid(value, &pid)) < 0)
1253                         log_debug("Failed to parse control-pid value %s", value);
1254                 else
1255                         s->control_pid = pid;
1256         } else if (streq(key, "control-command")) {
1257                 SocketExecCommand id;
1258
1259                 if ((id = socket_exec_command_from_string(value)) < 0)
1260                         log_debug("Failed to parse exec-command value %s", value);
1261                 else {
1262                         s->control_command_id = id;
1263                         s->control_command = s->exec_command[id];
1264                 }
1265         } else if (streq(key, "fifo")) {
1266                 int fd, skip = 0;
1267                 SocketPort *p;
1268
1269                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1270                         log_debug("Failed to parse fifo value %s", value);
1271                 else {
1272
1273                         LIST_FOREACH(port, p, s->ports)
1274                                 if (streq(p->path, value+skip))
1275                                         break;
1276
1277                         if (p) {
1278                                 if (p->fd >= 0)
1279                                         close_nointr_nofail(p->fd);
1280                                 p->fd = fdset_remove(fds, fd);
1281                         }
1282                 }
1283
1284         } else if (streq(key, "socket")) {
1285                 int fd, type, skip = 0;
1286                 SocketPort *p;
1287
1288                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1289                         log_debug("Failed to parse socket value %s", value);
1290                 else {
1291
1292                         LIST_FOREACH(port, p, s->ports)
1293                                 if (socket_address_is(&p->address, value+skip, type))
1294                                         break;
1295
1296                         if (p) {
1297                                 if (p->fd >= 0)
1298                                         close_nointr_nofail(p->fd);
1299                                 p->fd = fdset_remove(fds, fd);
1300                         }
1301                 }
1302
1303         } else
1304                 log_debug("Unknown serialization key '%s'", key);
1305
1306         return 0;
1307 }
1308
1309 static UnitActiveState socket_active_state(Unit *u) {
1310         assert(u);
1311
1312         return state_translation_table[SOCKET(u)->state];
1313 }
1314
1315 static const char *socket_sub_state_to_string(Unit *u) {
1316         assert(u);
1317
1318         return socket_state_to_string(SOCKET(u)->state);
1319 }
1320
1321 static bool socket_check_gc(Unit *u) {
1322         Socket *s = SOCKET(u);
1323
1324         assert(u);
1325
1326         return s->n_connections > 0;
1327 }
1328
1329 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1330         Socket *s = SOCKET(u);
1331         int cfd = -1;
1332
1333         assert(s);
1334         assert(fd >= 0);
1335
1336         if (s->state != SOCKET_LISTENING)
1337                 return;
1338
1339         log_debug("Incoming traffic on %s", u->meta.id);
1340
1341         if (events != EPOLLIN) {
1342                 log_error("Got invalid poll event on socket.");
1343                 goto fail;
1344         }
1345
1346         if (w->socket_accept) {
1347                 for (;;) {
1348
1349                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1350
1351                                 if (errno == EINTR)
1352                                         continue;
1353
1354                                 log_error("Failed to accept socket: %m");
1355                                 goto fail;
1356                         }
1357
1358                         break;
1359                 }
1360
1361                 socket_apply_socket_options(s, cfd);
1362         }
1363
1364         socket_enter_running(s, cfd);
1365         return;
1366
1367 fail:
1368         socket_enter_stop_pre(s, false);
1369 }
1370
1371 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1372         Socket *s = SOCKET(u);
1373         bool success;
1374
1375         assert(s);
1376         assert(pid >= 0);
1377
1378         if (pid != s->control_pid)
1379                 return;
1380
1381         s->control_pid = 0;
1382
1383         success = is_clean_exit(code, status);
1384         s->failure = s->failure || !success;
1385
1386         if (s->control_command)
1387                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1388
1389         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1390
1391         if (s->control_command && s->control_command->command_next && success) {
1392                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1393                 socket_run_next(s, success);
1394         } else {
1395                 s->control_command = NULL;
1396                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1397
1398                 /* No further commands for this step, so let's figure
1399                  * out what to do next */
1400
1401                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1402
1403                 switch (s->state) {
1404
1405                 case SOCKET_START_PRE:
1406                         if (success)
1407                                 socket_enter_start_post(s);
1408                         else
1409                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1410                         break;
1411
1412                 case SOCKET_START_POST:
1413                         if (success)
1414                                 socket_enter_listening(s);
1415                         else
1416                                 socket_enter_stop_pre(s, false);
1417                         break;
1418
1419                 case SOCKET_STOP_PRE:
1420                 case SOCKET_STOP_PRE_SIGTERM:
1421                 case SOCKET_STOP_PRE_SIGKILL:
1422                         socket_enter_stop_post(s, success);
1423                         break;
1424
1425                 case SOCKET_STOP_POST:
1426                 case SOCKET_FINAL_SIGTERM:
1427                 case SOCKET_FINAL_SIGKILL:
1428                         socket_enter_dead(s, success);
1429                         break;
1430
1431                 default:
1432                         assert_not_reached("Uh, control process died at wrong time.");
1433                 }
1434         }
1435 }
1436
1437 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1438         Socket *s = SOCKET(u);
1439
1440         assert(s);
1441         assert(elapsed == 1);
1442         assert(w == &s->timer_watch);
1443
1444         switch (s->state) {
1445
1446         case SOCKET_START_PRE:
1447                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1448                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1449
1450         case SOCKET_START_POST:
1451                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1452                 socket_enter_stop_pre(s, false);
1453                 break;
1454
1455         case SOCKET_STOP_PRE:
1456                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1457                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1458                 break;
1459
1460         case SOCKET_STOP_PRE_SIGTERM:
1461                 log_warning("%s stopping timed out. Killing.", u->meta.id);
1462                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1463                 break;
1464
1465         case SOCKET_STOP_PRE_SIGKILL:
1466                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1467                 socket_enter_stop_post(s, false);
1468                 break;
1469
1470         case SOCKET_STOP_POST:
1471                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1472                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1473                 break;
1474
1475         case SOCKET_FINAL_SIGTERM:
1476                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1477                 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1478                 break;
1479
1480         case SOCKET_FINAL_SIGKILL:
1481                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1482                 socket_enter_dead(s, false);
1483                 break;
1484
1485         default:
1486                 assert_not_reached("Timeout at wrong time.");
1487         }
1488 }
1489
1490 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1491         int *rfds;
1492         unsigned rn_fds, k;
1493         SocketPort *p;
1494
1495         assert(s);
1496         assert(fds);
1497         assert(n_fds);
1498
1499         /* Called from the service code for requesting our fds */
1500
1501         rn_fds = 0;
1502         LIST_FOREACH(port, p, s->ports)
1503                 if (p->fd >= 0)
1504                         rn_fds++;
1505
1506         if (!(rfds = new(int, rn_fds)) < 0)
1507                 return -ENOMEM;
1508
1509         k = 0;
1510         LIST_FOREACH(port, p, s->ports)
1511                 if (p->fd >= 0)
1512                         rfds[k++] = p->fd;
1513
1514         assert(k == rn_fds);
1515
1516         *fds = rfds;
1517         *n_fds = rn_fds;
1518
1519         return 0;
1520 }
1521
1522 void socket_notify_service_dead(Socket *s) {
1523         assert(s);
1524
1525         /* The service is dead. Dang!
1526          *
1527          * This is strictly for one-instance-for-all-connections
1528          * services. */
1529
1530         if (s->state == SOCKET_RUNNING) {
1531                 log_debug("%s got notified about service death.", s->meta.id);
1532                 socket_enter_listening(s);
1533         }
1534 }
1535
1536 void socket_connection_unref(Socket *s) {
1537         assert(s);
1538
1539         /* The service is dead. Yay!
1540          *
1541          * This is strictly for one-onstance-per-connection
1542          * services. */
1543
1544         assert(s->n_connections > 0);
1545         s->n_connections--;
1546
1547         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1548 }
1549
1550 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1551         [SOCKET_DEAD] = "dead",
1552         [SOCKET_START_PRE] = "start-pre",
1553         [SOCKET_START_POST] = "start-post",
1554         [SOCKET_LISTENING] = "listening",
1555         [SOCKET_RUNNING] = "running",
1556         [SOCKET_STOP_PRE] = "stop-pre",
1557         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1558         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1559         [SOCKET_STOP_POST] = "stop-post",
1560         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1561         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1562         [SOCKET_MAINTENANCE] = "maintenance"
1563 };
1564
1565 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1566
1567 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1568         [SOCKET_EXEC_START_PRE] = "StartPre",
1569         [SOCKET_EXEC_START_POST] = "StartPost",
1570         [SOCKET_EXEC_STOP_PRE] = "StopPre",
1571         [SOCKET_EXEC_STOP_POST] = "StopPost"
1572 };
1573
1574 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1575
1576 const UnitVTable socket_vtable = {
1577         .suffix = ".socket",
1578
1579         .init = socket_init,
1580         .done = socket_done,
1581         .load = socket_load,
1582
1583         .coldplug = socket_coldplug,
1584
1585         .dump = socket_dump,
1586
1587         .start = socket_start,
1588         .stop = socket_stop,
1589
1590         .serialize = socket_serialize,
1591         .deserialize_item = socket_deserialize_item,
1592
1593         .active_state = socket_active_state,
1594         .sub_state_to_string = socket_sub_state_to_string,
1595
1596         .check_gc = socket_check_gc,
1597
1598         .fd_event = socket_fd_event,
1599         .sigchld_event = socket_sigchld_event,
1600         .timer_event = socket_timer_event,
1601
1602         .bus_message_handler = bus_socket_message_handler
1603 };