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