src/socket.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   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 #include <mqueue.h>
  31
  32 #include "unit.h"
  33 #include "socket.h"
  34 #include "netinet/tcp.h"
  35 #include "log.h"
  36 #include "load-dropin.h"
  37 #include "load-fragment.h"
  38 #include "strv.h"
  39 #include "unit-name.h"
  40 #include "dbus-socket.h"
  41 #include "missing.h"
  42 #include "special.h"
  43 #include "bus-errors.h"
  44 #include "label.h"
  45 #include "exit-status.h"
  46 #include "def.h"
  47
  48 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  49         [SOCKET_DEAD] = UNIT_INACTIVE,
  50         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  51         [SOCKET_START_POST] = UNIT_ACTIVATING,
  52         [SOCKET_LISTENING] = UNIT_ACTIVE,
  53         [SOCKET_RUNNING] = UNIT_ACTIVE,
  54         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  55         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  56         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  57         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  58         [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  59         [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  60         [SOCKET_FAILED] = UNIT_FAILED
  61 };
  62
  63 static void socket_init(Unit *u) {
  64         Socket *s = SOCKET(u);
  65
  66         assert(u);
  67         assert(u->meta.load_state == UNIT_STUB);
  68
  69         s->backlog = SOMAXCONN;
  70         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  71         s->directory_mode = 0755;
  72         s->socket_mode = 0666;
  73
  74         s->max_connections = 64;
  75
  76         s->priority = -1;
  77         s->ip_tos = -1;
  78         s->ip_ttl = -1;
  79         s->mark = -1;
  80
  81         exec_context_init(&s->exec_context);
  82         s->exec_context.std_output = u->meta.manager->default_std_output;
  83         s->exec_context.std_error = u->meta.manager->default_std_error;
  84
  85         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  86 }
  87
  88 static void socket_unwatch_control_pid(Socket *s) {
  89         assert(s);
  90
  91         if (s->control_pid <= 0)
  92                 return;
  93
  94         unit_unwatch_pid(UNIT(s), s->control_pid);
  95         s->control_pid = 0;
  96 }
  97
  98 static void socket_done(Unit *u) {
  99         Socket *s = SOCKET(u);
 100         SocketPort *p;
 101         Meta *i;
 102
 103         assert(s);
 104
 105         while ((p = s->ports)) {
 106                 LIST_REMOVE(SocketPort, port, s->ports, p);
 107
 108                 if (p->fd >= 0) {
 109                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 110                         close_nointr_nofail(p->fd);
 111                 }
 112
 113                 free(p->path);
 114                 free(p);
 115         }
 116
 117         exec_context_done(&s->exec_context);
 118         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 119         s->control_command = NULL;
 120
 121         socket_unwatch_control_pid(s);
 122
 123         s->service = NULL;
 124
 125         free(s->tcp_congestion);
 126         s->tcp_congestion = NULL;
 127
 128         free(s->bind_to_device);
 129         s->bind_to_device = NULL;
 130
 131         unit_unwatch_timer(u, &s->timer_watch);
 132
 133         /* Make sure no service instance refers to us anymore. */
 134         LIST_FOREACH(units_by_type, i, u->meta.manager->units_by_type[UNIT_SERVICE]) {
 135                 Service *service = (Service *) i;
 136
 137                 if (service->accept_socket == s)
 138                         service->accept_socket = NULL;
 139
 140                 set_remove(service->configured_sockets, s);
 141         }
 142 }
 143
 144 static int socket_instantiate_service(Socket *s) {
 145         char *prefix, *name;
 146         int r;
 147         Unit *u;
 148
 149         assert(s);
 150
 151         /* This fills in s->service if it isn't filled in yet. For
 152          * Accept=yes sockets we create the next connection service
 153          * here. For Accept=no this is mostly a NOP since the service
 154          * is figured out at load time anyway. */
 155
 156         if (s->service)
 157                 return 0;
 158
 159         assert(s->accept);
 160
 161         if (!(prefix = unit_name_to_prefix(s->meta.id)))
 162                 return -ENOMEM;
 163
 164         r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
 165         free(prefix);
 166
 167         if (r < 0)
 168                 return -ENOMEM;
 169
 170         r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
 171         free(name);
 172
 173         if (r < 0)
 174                 return r;
 175
 176 #ifdef HAVE_SYSV_COMPAT
 177         if (SERVICE(u)->sysv_path) {
 178                 log_error("Using SysV services for socket activation is not supported. Refusing.");
 179                 return -ENOENT;
 180         }
 181 #endif
 182
 183         u->meta.no_gc = true;
 184         s->service = SERVICE(u);
 185         return 0;
 186 }
 187
 188 static bool have_non_accept_socket(Socket *s) {
 189         SocketPort *p;
 190
 191         assert(s);
 192
 193         if (!s->accept)
 194                 return true;
 195
 196         LIST_FOREACH(port, p, s->ports) {
 197
 198                 if (p->type != SOCKET_SOCKET)
 199                         return true;
 200
 201                 if (!socket_address_can_accept(&p->address))
 202                         return true;
 203         }
 204
 205         return false;
 206 }
 207
 208 static int socket_verify(Socket *s) {
 209         assert(s);
 210
 211         if (s->meta.load_state != UNIT_LOADED)
 212                 return 0;
 213
 214         if (!s->ports) {
 215                 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
 216                 return -EINVAL;
 217         }
 218
 219         if (s->accept && have_non_accept_socket(s)) {
 220                 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
 221                 return -EINVAL;
 222         }
 223
 224         if (s->accept && s->max_connections <= 0) {
 225                 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
 226                 return -EINVAL;
 227         }
 228
 229         if (s->accept && s->service) {
 230                 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", s->meta.id);
 231                 return -EINVAL;
 232         }
 233
 234         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 235                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 236                 return -EINVAL;
 237         }
 238
 239         return 0;
 240 }
 241
 242 static bool socket_needs_mount(Socket *s, const char *prefix) {
 243         SocketPort *p;
 244
 245         assert(s);
 246
 247         LIST_FOREACH(port, p, s->ports) {
 248
 249                 if (p->type == SOCKET_SOCKET) {
 250                         if (socket_address_needs_mount(&p->address, prefix))
 251                                 return true;
 252                 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
 253                         if (path_startswith(p->path, prefix))
 254                                 return true;
 255                 }
 256         }
 257
 258         return false;
 259 }
 260
 261 int socket_add_one_mount_link(Socket *s, Mount *m) {
 262         int r;
 263
 264         assert(s);
 265         assert(m);
 266
 267         if (s->meta.load_state != UNIT_LOADED ||
 268             m->meta.load_state != UNIT_LOADED)
 269                 return 0;
 270
 271         if (!socket_needs_mount(s, m->where))
 272                 return 0;
 273
 274         if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
 275                 return r;
 276
 277         return 0;
 278 }
 279
 280 static int socket_add_mount_links(Socket *s) {
 281         Meta *other;
 282         int r;
 283
 284         assert(s);
 285
 286         LIST_FOREACH(units_by_type, other, s->meta.manager->units_by_type[UNIT_MOUNT])
 287                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 288                         return r;
 289
 290         return 0;
 291 }
 292
 293 static int socket_add_device_link(Socket *s) {
 294         char *t;
 295         int r;
 296
 297         assert(s);
 298
 299         if (!s->bind_to_device)
 300                 return 0;
 301
 302         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 303                 return -ENOMEM;
 304
 305         r = unit_add_node_link(UNIT(s), t, false);
 306         free(t);
 307
 308         return r;
 309 }
 310
 311 static int socket_add_default_dependencies(Socket *s) {
 312         int r;
 313         assert(s);
 314
 315         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 316                 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 317                         return r;
 318
 319                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
 320                         return r;
 321         }
 322
 323         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 324 }
 325
 326 static int socket_load(Unit *u) {
 327         Socket *s = SOCKET(u);
 328         int r;
 329
 330         assert(u);
 331         assert(u->meta.load_state == UNIT_STUB);
 332
 333         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 334                 return r;
 335
 336         /* This is a new unit? Then let's add in some extras */
 337         if (u->meta.load_state == UNIT_LOADED) {
 338
 339                 if (have_non_accept_socket(s)) {
 340
 341                         if (!s->service)
 342                                 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)) < 0)
 343                                         return r;
 344
 345                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
 346                                 return r;
 347                 }
 348
 349                 if ((r = socket_add_mount_links(s)) < 0)
 350                         return r;
 351
 352                 if ((r = socket_add_device_link(s)) < 0)
 353                         return r;
 354
 355                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 356                         return r;
 357
 358                 if ((r = unit_add_default_cgroups(u)) < 0)
 359                         return r;
 360
 361                 if (s->meta.default_dependencies)
 362                         if ((r = socket_add_default_dependencies(s)) < 0)
 363                                 return r;
 364         }
 365
 366         return socket_verify(s);
 367 }
 368
 369 static const char* listen_lookup(int family, int type) {
 370
 371         if (family == AF_NETLINK)
 372                 return "ListenNetlink";
 373
 374         if (type == SOCK_STREAM)
 375                 return "ListenStream";
 376         else if (type == SOCK_DGRAM)
 377                 return "ListenDatagram";
 378         else if (type == SOCK_SEQPACKET)
 379                 return "ListenSequentialPacket";
 380
 381         assert_not_reached("Unknown socket type");
 382         return NULL;
 383 }
 384
 385 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 386
 387         SocketExecCommand c;
 388         Socket *s = SOCKET(u);
 389         SocketPort *p;
 390         const char *prefix2;
 391         char *p2;
 392
 393         assert(s);
 394         assert(f);
 395
 396         p2 = strappend(prefix, "\t");
 397         prefix2 = p2 ? p2 : prefix;
 398
 399         fprintf(f,
 400                 "%sSocket State: %s\n"
 401                 "%sBindIPv6Only: %s\n"
 402                 "%sBacklog: %u\n"
 403                 "%sSocketMode: %04o\n"
 404                 "%sDirectoryMode: %04o\n"
 405                 "%sKeepAlive: %s\n"
 406                 "%sFreeBind: %s\n"
 407                 "%sTransparent: %s\n"
 408                 "%sBroadcast: %s\n"
 409                 "%sTCPCongestion: %s\n",
 410                 prefix, socket_state_to_string(s->state),
 411                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 412                 prefix, s->backlog,
 413                 prefix, s->socket_mode,
 414                 prefix, s->directory_mode,
 415                 prefix, yes_no(s->keep_alive),
 416                 prefix, yes_no(s->free_bind),
 417                 prefix, yes_no(s->transparent),
 418                 prefix, yes_no(s->broadcast),
 419                 prefix, strna(s->tcp_congestion));
 420
 421         if (s->control_pid > 0)
 422                 fprintf(f,
 423                         "%sControl PID: %lu\n",
 424                         prefix, (unsigned long) s->control_pid);
 425
 426         if (s->bind_to_device)
 427                 fprintf(f,
 428                         "%sBindToDevice: %s\n",
 429                         prefix, s->bind_to_device);
 430
 431         if (s->accept)
 432                 fprintf(f,
 433                         "%sAccepted: %u\n"
 434                         "%sNConnections: %u\n"
 435                         "%sMaxConnections: %u\n",
 436                         prefix, s->n_accepted,
 437                         prefix, s->n_connections,
 438                         prefix, s->max_connections);
 439
 440         if (s->priority >= 0)
 441                 fprintf(f,
 442                         "%sPriority: %i\n",
 443                         prefix, s->priority);
 444
 445         if (s->receive_buffer > 0)
 446                 fprintf(f,
 447                         "%sReceiveBuffer: %zu\n",
 448                         prefix, s->receive_buffer);
 449
 450         if (s->send_buffer > 0)
 451                 fprintf(f,
 452                         "%sSendBuffer: %zu\n",
 453                         prefix, s->send_buffer);
 454
 455         if (s->ip_tos >= 0)
 456                 fprintf(f,
 457                         "%sIPTOS: %i\n",
 458                         prefix, s->ip_tos);
 459
 460         if (s->ip_ttl >= 0)
 461                 fprintf(f,
 462                         "%sIPTTL: %i\n",
 463                         prefix, s->ip_ttl);
 464
 465         if (s->pipe_size > 0)
 466                 fprintf(f,
 467                         "%sPipeSize: %zu\n",
 468                         prefix, s->pipe_size);
 469
 470         if (s->mark >= 0)
 471                 fprintf(f,
 472                         "%sMark: %i\n",
 473                         prefix, s->mark);
 474
 475         if (s->mq_maxmsg > 0)
 476                 fprintf(f,
 477                         "%sMessageQueueMaxMessages: %li\n",
 478                         prefix, s->mq_maxmsg);
 479
 480         if (s->mq_msgsize > 0)
 481                 fprintf(f,
 482                         "%sMessageQueueMessageSize: %li\n",
 483                         prefix, s->mq_msgsize);
 484
 485         LIST_FOREACH(port, p, s->ports) {
 486
 487                 if (p->type == SOCKET_SOCKET) {
 488                         const char *t;
 489                         int r;
 490                         char *k = NULL;
 491
 492                         if ((r = socket_address_print(&p->address, &k)) < 0)
 493                                 t = strerror(-r);
 494                         else
 495                                 t = k;
 496
 497                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
 498                         free(k);
 499                 } else if (p->type == SOCKET_SPECIAL)
 500                         fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
 501                 else if (p->type == SOCKET_MQUEUE)
 502                         fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
 503                 else
 504                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 505         }
 506
 507         exec_context_dump(&s->exec_context, f, prefix);
 508
 509         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 510                 if (!s->exec_command[c])
 511                         continue;
 512
 513                 fprintf(f, "%s-> %s:\n",
 514                         prefix, socket_exec_command_to_string(c));
 515
 516                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 517         }
 518
 519         free(p2);
 520 }
 521
 522 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 523         socklen_t l;
 524         char *r;
 525         union {
 526                 struct sockaddr sa;
 527                 struct sockaddr_un un;
 528                 struct sockaddr_in in;
 529                 struct sockaddr_in6 in6;
 530                 struct sockaddr_storage storage;
 531         } local, remote;
 532
 533         assert(fd >= 0);
 534         assert(instance);
 535
 536         l = sizeof(local);
 537         if (getsockname(fd, &local.sa, &l) < 0)
 538                 return -errno;
 539
 540         l = sizeof(remote);
 541         if (getpeername(fd, &remote.sa, &l) < 0)
 542                 return -errno;
 543
 544         switch (local.sa.sa_family) {
 545
 546         case AF_INET: {
 547                 uint32_t
 548                         a = ntohl(local.in.sin_addr.s_addr),
 549                         b = ntohl(remote.in.sin_addr.s_addr);
 550
 551                 if (asprintf(&r,
 552                              "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 553                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 554                              ntohs(local.in.sin_port),
 555                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 556                              ntohs(remote.in.sin_port)) < 0)
 557                         return -ENOMEM;
 558
 559                 break;
 560         }
 561
 562         case AF_INET6: {
 563                 static const char ipv4_prefix[] = {
 564                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 565                 };
 566
 567                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 568                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 569                         const uint8_t
 570                                 *a = local.in6.sin6_addr.s6_addr+12,
 571                                 *b = remote.in6.sin6_addr.s6_addr+12;
 572
 573                         if (asprintf(&r,
 574                                      "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 575                                      a[0], a[1], a[2], a[3],
 576                                      ntohs(local.in6.sin6_port),
 577                                      b[0], b[1], b[2], b[3],
 578                                      ntohs(remote.in6.sin6_port)) < 0)
 579                                 return -ENOMEM;
 580                 } else {
 581                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 582
 583                         if (asprintf(&r,
 584                                      "%s:%u-%s:%u",
 585                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 586                                      ntohs(local.in6.sin6_port),
 587                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 588                                      ntohs(remote.in6.sin6_port)) < 0)
 589                                 return -ENOMEM;
 590                 }
 591
 592                 break;
 593         }
 594
 595         case AF_UNIX: {
 596                 struct ucred ucred;
 597
 598                 l = sizeof(ucred);
 599                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 600                         return -errno;
 601
 602                 if (asprintf(&r,
 603                              "%u-%lu-%lu",
 604                              nr,
 605                              (unsigned long) ucred.pid,
 606                              (unsigned long) ucred.uid) < 0)
 607                         return -ENOMEM;
 608
 609                 break;
 610         }
 611
 612         default:
 613                 assert_not_reached("Unhandled socket type.");
 614         }
 615
 616         *instance = r;
 617         return 0;
 618 }
 619
 620 static void socket_close_fds(Socket *s) {
 621         SocketPort *p;
 622
 623         assert(s);
 624
 625         LIST_FOREACH(port, p, s->ports) {
 626                 if (p->fd < 0)
 627                         continue;
 628
 629                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 630                 close_nointr_nofail(p->fd);
 631
 632                 /* One little note: we should never delete any sockets
 633                  * in the file system here! After all some other
 634                  * process we spawned might still have a reference of
 635                  * this fd and wants to continue to use it. Therefore
 636                  * we delete sockets in the file system before we
 637                  * create a new one, not after we stopped using
 638                  * one! */
 639
 640                 p->fd = -1;
 641         }
 642 }
 643
 644 static void socket_apply_socket_options(Socket *s, int fd) {
 645         assert(s);
 646         assert(fd >= 0);
 647
 648         if (s->keep_alive) {
 649                 int b = s->keep_alive;
 650                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 651                         log_warning("SO_KEEPALIVE failed: %m");
 652         }
 653
 654         if (s->broadcast) {
 655                 int one = 1;
 656                 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
 657                         log_warning("SO_BROADCAST failed: %m");
 658         }
 659
 660         if (s->priority >= 0)
 661                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 662                         log_warning("SO_PRIORITY failed: %m");
 663
 664         if (s->receive_buffer > 0) {
 665                 int value = (int) s->receive_buffer;
 666                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
 667                         log_warning("SO_RCVBUFFORCE failed: %m");
 668         }
 669
 670         if (s->send_buffer > 0) {
 671                 int value = (int) s->send_buffer;
 672                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
 673                         log_warning("SO_SNDBUFFORCE failed: %m");
 674         }
 675
 676         if (s->mark >= 0)
 677                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 678                         log_warning("SO_MARK failed: %m");
 679
 680         if (s->ip_tos >= 0)
 681                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 682                         log_warning("IP_TOS failed: %m");
 683
 684         if (s->ip_ttl >= 0) {
 685                 int r, x;
 686
 687                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
 688
 689                 if (socket_ipv6_is_supported())
 690                         x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
 691                 else {
 692                         x = -1;
 693                         errno = EAFNOSUPPORT;
 694                 }
 695
 696                 if (r < 0 && x < 0)
 697                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
 698         }
 699
 700         if (s->tcp_congestion)
 701                 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
 702                         log_warning("TCP_CONGESTION failed: %m");
 703 }
 704
 705 static void socket_apply_fifo_options(Socket *s, int fd) {
 706         assert(s);
 707         assert(fd >= 0);
 708
 709         if (s->pipe_size > 0)
 710                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 711                         log_warning("F_SETPIPE_SZ: %m");
 712 }
 713
 714 static int fifo_address_create(
 715                 const char *path,
 716                 mode_t directory_mode,
 717                 mode_t socket_mode,
 718                 int *_fd) {
 719
 720         int fd = -1, r = 0;
 721         struct stat st;
 722         mode_t old_mask;
 723
 724         assert(path);
 725         assert(_fd);
 726
 727         mkdir_parents(path, directory_mode);
 728
 729         if ((r = label_fifofile_set(path)) < 0)
 730                 goto fail;
 731
 732         /* Enforce the right access mode for the fifo */
 733         old_mask = umask(~ socket_mode);
 734
 735         /* Include the original umask in our mask */
 736         umask(~socket_mode | old_mask);
 737
 738         r = mkfifo(path, socket_mode);
 739         umask(old_mask);
 740
 741         if (r < 0 && errno != EEXIST) {
 742                 r = -errno;
 743                 goto fail;
 744         }
 745
 746         if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 747                 r = -errno;
 748                 goto fail;
 749         }
 750
 751         label_file_clear();
 752
 753         if (fstat(fd, &st) < 0) {
 754                 r = -errno;
 755                 goto fail;
 756         }
 757
 758         if (!S_ISFIFO(st.st_mode) ||
 759             (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
 760             st.st_uid != getuid() ||
 761             st.st_gid != getgid()) {
 762
 763                 r = -EEXIST;
 764                 goto fail;
 765         }
 766
 767         *_fd = fd;
 768         return 0;
 769
 770 fail:
 771         label_file_clear();
 772
 773         if (fd >= 0)
 774                 close_nointr_nofail(fd);
 775
 776         return r;
 777 }
 778
 779 static int special_address_create(
 780                 const char *path,
 781                 int *_fd) {
 782
 783         int fd = -1, r = 0;
 784         struct stat st;
 785
 786         assert(path);
 787         assert(_fd);
 788
 789         if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 790                 r = -errno;
 791                 goto fail;
 792         }
 793
 794         if (fstat(fd, &st) < 0) {
 795                 r = -errno;
 796                 goto fail;
 797         }
 798
 799         /* Check whether this is a /proc, /sys or /dev file or char device */
 800         if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
 801                 r = -EEXIST;
 802                 goto fail;
 803         }
 804
 805         *_fd = fd;
 806         return 0;
 807
 808 fail:
 809         if (fd >= 0)
 810                 close_nointr_nofail(fd);
 811
 812         return r;
 813 }
 814
 815 static int mq_address_create(
 816                 const char *path,
 817                 mode_t mq_mode,
 818                 long maxmsg,
 819                 long msgsize,
 820                 int *_fd) {
 821
 822         int fd = -1, r = 0;
 823         struct stat st;
 824         mode_t old_mask;
 825         struct mq_attr _attr, *attr = NULL;
 826
 827         assert(path);
 828         assert(_fd);
 829
 830         if (maxmsg > 0 && msgsize > 0) {
 831                 zero(_attr);
 832                 _attr.mq_flags = O_NONBLOCK;
 833                 _attr.mq_maxmsg = maxmsg;
 834                 _attr.mq_msgsize = msgsize;
 835                 attr = &_attr;
 836         }
 837
 838         /* Enforce the right access mode for the mq */
 839         old_mask = umask(~ mq_mode);
 840
 841         /* Include the original umask in our mask */
 842         umask(~mq_mode | old_mask);
 843
 844         fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
 845         umask(old_mask);
 846
 847         if (fd < 0 && errno != EEXIST) {
 848                 r = -errno;
 849                 goto fail;
 850         }
 851
 852         if (fstat(fd, &st) < 0) {
 853                 r = -errno;
 854                 goto fail;
 855         }
 856
 857         if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
 858             st.st_uid != getuid() ||
 859             st.st_gid != getgid()) {
 860
 861                 r = -EEXIST;
 862                 goto fail;
 863         }
 864
 865         *_fd = fd;
 866         return 0;
 867
 868 fail:
 869         if (fd >= 0)
 870                 close_nointr_nofail(fd);
 871
 872         return r;
 873 }
 874
 875 static int socket_open_fds(Socket *s) {
 876         SocketPort *p;
 877         int r;
 878         char *label = NULL;
 879         bool know_label = false;
 880
 881         assert(s);
 882
 883         LIST_FOREACH(port, p, s->ports) {
 884
 885                 if (p->fd >= 0)
 886                         continue;
 887
 888                 if (p->type == SOCKET_SOCKET) {
 889
 890                         if (!know_label) {
 891
 892                                 if ((r = socket_instantiate_service(s)) < 0)
 893                                         return r;
 894
 895                                 if (s->service && s->service->exec_command[SERVICE_EXEC_START]) {
 896                                         r = label_get_create_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label);
 897
 898                                         if (r < 0) {
 899                                                 if (r != -EPERM)
 900                                                         return r;
 901                                         }
 902                                 }
 903
 904                                 know_label = true;
 905                         }
 906
 907                         if ((r = socket_address_listen(
 908                                              &p->address,
 909                                              s->backlog,
 910                                              s->bind_ipv6_only,
 911                                              s->bind_to_device,
 912                                              s->free_bind,
 913                                              s->transparent,
 914                                              s->directory_mode,
 915                                              s->socket_mode,
 916                                              label,
 917                                              &p->fd)) < 0)
 918                                 goto rollback;
 919
 920                         socket_apply_socket_options(s, p->fd);
 921
 922                 } else  if (p->type == SOCKET_SPECIAL) {
 923
 924                         if ((r = special_address_create(
 925                                              p->path,
 926                                              &p->fd)) < 0)
 927                                 goto rollback;
 928
 929                 } else  if (p->type == SOCKET_FIFO) {
 930
 931                         if ((r = fifo_address_create(
 932                                              p->path,
 933                                              s->directory_mode,
 934                                              s->socket_mode,
 935                                              &p->fd)) < 0)
 936                                 goto rollback;
 937
 938                         socket_apply_fifo_options(s, p->fd);
 939                 } else if (p->type == SOCKET_MQUEUE) {
 940
 941                         if ((r = mq_address_create(
 942                                              p->path,
 943                                              s->socket_mode,
 944                                              s->mq_maxmsg,
 945                                              s->mq_msgsize,
 946                                              &p->fd)) < 0)
 947                                 goto rollback;
 948                 } else
 949                         assert_not_reached("Unknown port type");
 950         }
 951
 952         label_free(label);
 953         return 0;
 954
 955 rollback:
 956         socket_close_fds(s);
 957         label_free(label);
 958         return r;
 959 }
 960
 961 static void socket_unwatch_fds(Socket *s) {
 962         SocketPort *p;
 963
 964         assert(s);
 965
 966         LIST_FOREACH(port, p, s->ports) {
 967                 if (p->fd < 0)
 968                         continue;
 969
 970                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 971         }
 972 }
 973
 974 static int socket_watch_fds(Socket *s) {
 975         SocketPort *p;
 976         int r;
 977
 978         assert(s);
 979
 980         LIST_FOREACH(port, p, s->ports) {
 981                 if (p->fd < 0)
 982                         continue;
 983
 984                 p->fd_watch.socket_accept =
 985                         s->accept &&
 986                         p->type == SOCKET_SOCKET &&
 987                         socket_address_can_accept(&p->address);
 988
 989                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 990                         goto fail;
 991         }
 992
 993         return 0;
 994
 995 fail:
 996         socket_unwatch_fds(s);
 997         return r;
 998 }
 999
1000 static void socket_set_state(Socket *s, SocketState state) {
1001         SocketState old_state;
1002         assert(s);
1003
1004         old_state = s->state;
1005         s->state = state;
1006
1007         if (state != SOCKET_START_PRE &&
1008             state != SOCKET_START_POST &&
1009             state != SOCKET_STOP_PRE &&
1010             state != SOCKET_STOP_PRE_SIGTERM &&
1011             state != SOCKET_STOP_PRE_SIGKILL &&
1012             state != SOCKET_STOP_POST &&
1013             state != SOCKET_FINAL_SIGTERM &&
1014             state != SOCKET_FINAL_SIGKILL) {
1015                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1016                 socket_unwatch_control_pid(s);
1017                 s->control_command = NULL;
1018                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1019         }
1020
1021         if (state != SOCKET_LISTENING)
1022                 socket_unwatch_fds(s);
1023
1024         if (state != SOCKET_START_POST &&
1025             state != SOCKET_LISTENING &&
1026             state != SOCKET_RUNNING &&
1027             state != SOCKET_STOP_PRE &&
1028             state != SOCKET_STOP_PRE_SIGTERM &&
1029             state != SOCKET_STOP_PRE_SIGKILL)
1030                 socket_close_fds(s);
1031
1032         if (state != old_state)
1033                 log_debug("%s changed %s -> %s",
1034                           s->meta.id,
1035                           socket_state_to_string(old_state),
1036                           socket_state_to_string(state));
1037
1038         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1039 }
1040
1041 static int socket_coldplug(Unit *u) {
1042         Socket *s = SOCKET(u);
1043         int r;
1044
1045         assert(s);
1046         assert(s->state == SOCKET_DEAD);
1047
1048         if (s->deserialized_state != s->state) {
1049
1050                 if (s->deserialized_state == SOCKET_START_PRE ||
1051                     s->deserialized_state == SOCKET_START_POST ||
1052                     s->deserialized_state == SOCKET_STOP_PRE ||
1053                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1054                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1055                     s->deserialized_state == SOCKET_STOP_POST ||
1056                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1057                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1058
1059                         if (s->control_pid <= 0)
1060                                 return -EBADMSG;
1061
1062                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1063                                 return r;
1064
1065                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1066                                 return r;
1067                 }
1068
1069                 if (s->deserialized_state == SOCKET_START_POST ||
1070                     s->deserialized_state == SOCKET_LISTENING ||
1071                     s->deserialized_state == SOCKET_RUNNING ||
1072                     s->deserialized_state == SOCKET_STOP_PRE ||
1073                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1074                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1075                         if ((r = socket_open_fds(s)) < 0)
1076                                 return r;
1077
1078                 if (s->deserialized_state == SOCKET_LISTENING)
1079                         if ((r = socket_watch_fds(s)) < 0)
1080                                 return r;
1081
1082                 socket_set_state(s, s->deserialized_state);
1083         }
1084
1085         return 0;
1086 }
1087
1088 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1089         pid_t pid;
1090         int r;
1091         char **argv;
1092
1093         assert(s);
1094         assert(c);
1095         assert(_pid);
1096
1097         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1098                 goto fail;
1099
1100         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1101                 r = -ENOMEM;
1102                 goto fail;
1103         }
1104
1105         r = exec_spawn(c,
1106                        argv,
1107                        &s->exec_context,
1108                        NULL, 0,
1109                        s->meta.manager->environment,
1110                        true,
1111                        true,
1112                        true,
1113                        s->meta.manager->confirm_spawn,
1114                        s->meta.cgroup_bondings,
1115                        &pid);
1116
1117         strv_free(argv);
1118         if (r < 0)
1119                 goto fail;
1120
1121         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1122                 /* FIXME: we need to do something here */
1123                 goto fail;
1124
1125         *_pid = pid;
1126
1127         return 0;
1128
1129 fail:
1130         unit_unwatch_timer(UNIT(s), &s->timer_watch);
1131
1132         return r;
1133 }
1134
1135 static void socket_enter_dead(Socket *s, bool success) {
1136         assert(s);
1137
1138         if (!success)
1139                 s->failure = true;
1140
1141         socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
1142 }
1143
1144 static void socket_enter_signal(Socket *s, SocketState state, bool success);
1145
1146 static void socket_enter_stop_post(Socket *s, bool success) {
1147         int r;
1148         assert(s);
1149
1150         if (!success)
1151                 s->failure = true;
1152
1153         socket_unwatch_control_pid(s);
1154
1155         s->control_command_id = SOCKET_EXEC_STOP_POST;
1156
1157         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1158                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1159                         goto fail;
1160
1161                 socket_set_state(s, SOCKET_STOP_POST);
1162         } else
1163                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
1164
1165         return;
1166
1167 fail:
1168         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1169         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1170 }
1171
1172 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1173         int r;
1174         Set *pid_set = NULL;
1175         bool wait_for_exit = false;
1176
1177         assert(s);
1178
1179         if (!success)
1180                 s->failure = true;
1181
1182         if (s->exec_context.kill_mode != KILL_NONE) {
1183                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1184
1185                 if (s->control_pid > 0) {
1186                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1187
1188                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1189                         else
1190                                 wait_for_exit = true;
1191                 }
1192
1193                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1194
1195                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1196                                 r = -ENOMEM;
1197                                 goto fail;
1198                         }
1199
1200                         /* Exclude the control pid from being killed via the cgroup */
1201                         if (s->control_pid > 0)
1202                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1203                                         goto fail;
1204
1205                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1206                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1207                                         log_warning("Failed to kill control group: %s", strerror(-r));
1208                         } else if (r > 0)
1209                                 wait_for_exit = true;
1210
1211                         set_free(pid_set);
1212                         pid_set = NULL;
1213                 }
1214         }
1215
1216         if (wait_for_exit) {
1217                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1218                         goto fail;
1219
1220                 socket_set_state(s, state);
1221         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1222                 socket_enter_stop_post(s, true);
1223         else
1224                 socket_enter_dead(s, true);
1225
1226         return;
1227
1228 fail:
1229         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1230
1231         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1232                 socket_enter_stop_post(s, false);
1233         else
1234                 socket_enter_dead(s, false);
1235
1236         if (pid_set)
1237                 set_free(pid_set);
1238 }
1239
1240 static void socket_enter_stop_pre(Socket *s, bool success) {
1241         int r;
1242         assert(s);
1243
1244         if (!success)
1245                 s->failure = true;
1246
1247         socket_unwatch_control_pid(s);
1248
1249         s->control_command_id = SOCKET_EXEC_STOP_PRE;
1250
1251         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1252                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1253                         goto fail;
1254
1255                 socket_set_state(s, SOCKET_STOP_PRE);
1256         } else
1257                 socket_enter_stop_post(s, true);
1258
1259         return;
1260
1261 fail:
1262         log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
1263         socket_enter_stop_post(s, false);
1264 }
1265
1266 static void socket_enter_listening(Socket *s) {
1267         int r;
1268         assert(s);
1269
1270         if ((r = socket_watch_fds(s)) < 0) {
1271                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1272                 goto fail;
1273         }
1274
1275         socket_set_state(s, SOCKET_LISTENING);
1276         return;
1277
1278 fail:
1279         socket_enter_stop_pre(s, false);
1280 }
1281
1282 static void socket_enter_start_post(Socket *s) {
1283         int r;
1284         assert(s);
1285
1286         if ((r = socket_open_fds(s)) < 0) {
1287                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
1288                 goto fail;
1289         }
1290
1291         socket_unwatch_control_pid(s);
1292
1293         s->control_command_id = SOCKET_EXEC_START_POST;
1294
1295         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1296                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
1297                         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1298                         goto fail;
1299                 }
1300
1301                 socket_set_state(s, SOCKET_START_POST);
1302         } else
1303                 socket_enter_listening(s);
1304
1305         return;
1306
1307 fail:
1308         socket_enter_stop_pre(s, false);
1309 }
1310
1311 static void socket_enter_start_pre(Socket *s) {
1312         int r;
1313         assert(s);
1314
1315         socket_unwatch_control_pid(s);
1316
1317         s->control_command_id = SOCKET_EXEC_START_PRE;
1318
1319         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1320                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1321                         goto fail;
1322
1323                 socket_set_state(s, SOCKET_START_PRE);
1324         } else
1325                 socket_enter_start_post(s);
1326
1327         return;
1328
1329 fail:
1330         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1331         socket_enter_dead(s, false);
1332 }
1333
1334 static void socket_enter_running(Socket *s, int cfd) {
1335         int r;
1336         DBusError error;
1337
1338         assert(s);
1339         dbus_error_init(&error);
1340
1341         /* We don't take connections anymore if we are supposed to
1342          * shut down anyway */
1343         if (unit_pending_inactive(UNIT(s))) {
1344                 log_debug("Suppressing connection request on %s since unit stop is scheduled.", s->meta.id);
1345
1346                 if (cfd >= 0)
1347                         close_nointr_nofail(cfd);
1348                 else  {
1349                         /* Flush all sockets by closing and reopening them */
1350                         socket_close_fds(s);
1351
1352                         if ((r = socket_watch_fds(s)) < 0) {
1353                                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1354                                 socket_enter_stop_pre(s, false);
1355                         }
1356                 }
1357
1358                 return;
1359         }
1360
1361         if (cfd < 0) {
1362                 bool pending = false;
1363                 Meta *i;
1364
1365                 /* If there's already a start pending don't bother to
1366                  * do anything */
1367                 LIST_FOREACH(units_by_type, i, s->meta.manager->units_by_type[UNIT_SERVICE]) {
1368                         Service *service = (Service *) i;
1369
1370                         if (!set_get(service->configured_sockets, s))
1371                                 continue;
1372
1373                         if (!unit_pending_active(UNIT(service)))
1374                                 continue;
1375
1376                         pending = true;
1377                         break;
1378                 }
1379
1380                 if (!pending)
1381                         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1382                                 goto fail;
1383
1384                 socket_set_state(s, SOCKET_RUNNING);
1385         } else {
1386                 char *prefix, *instance = NULL, *name;
1387                 Service *service;
1388
1389                 if (s->n_connections >= s->max_connections) {
1390                         log_warning("Too many incoming connections (%u)", s->n_connections);
1391                         close_nointr_nofail(cfd);
1392                         return;
1393                 }
1394
1395                 if ((r = socket_instantiate_service(s)) < 0)
1396                         goto fail;
1397
1398                 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
1399                         goto fail;
1400
1401                 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1402                         free(instance);
1403                         r = -ENOMEM;
1404                         goto fail;
1405                 }
1406
1407                 name = unit_name_build(prefix, instance, ".service");
1408                 free(prefix);
1409                 free(instance);
1410
1411                 if (!name) {
1412                         r = -ENOMEM;
1413                         goto fail;
1414                 }
1415
1416                 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1417                         free(name);
1418                         goto fail;
1419                 }
1420
1421                 service = s->service;
1422                 s->service = NULL;
1423                 s->n_accepted ++;
1424
1425                 service->meta.no_gc = false;
1426
1427                 unit_choose_id(UNIT(service), name);
1428                 free(name);
1429
1430                 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
1431                         goto fail;
1432
1433                 cfd = -1;
1434                 s->n_connections ++;
1435
1436                 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
1437                         goto fail;
1438
1439                 /* Notify clients about changed counters */
1440                 unit_add_to_dbus_queue(UNIT(s));
1441         }
1442
1443         return;
1444
1445 fail:
1446         log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
1447         socket_enter_stop_pre(s, false);
1448
1449         if (cfd >= 0)
1450                 close_nointr_nofail(cfd);
1451
1452         dbus_error_free(&error);
1453 }
1454
1455 static void socket_run_next(Socket *s, bool success) {
1456         int r;
1457
1458         assert(s);
1459         assert(s->control_command);
1460         assert(s->control_command->command_next);
1461
1462         if (!success)
1463                 s->failure = true;
1464
1465         socket_unwatch_control_pid(s);
1466
1467         s->control_command = s->control_command->command_next;
1468
1469         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1470                 goto fail;
1471
1472         return;
1473
1474 fail:
1475         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1476
1477         if (s->state == SOCKET_START_POST)
1478                 socket_enter_stop_pre(s, false);
1479         else if (s->state == SOCKET_STOP_POST)
1480                 socket_enter_dead(s, false);
1481         else
1482                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1483 }
1484
1485 static int socket_start(Unit *u) {
1486         Socket *s = SOCKET(u);
1487
1488         assert(s);
1489
1490         /* We cannot fulfill this request right now, try again later
1491          * please! */
1492         if (s->state == SOCKET_STOP_PRE ||
1493             s->state == SOCKET_STOP_PRE_SIGKILL ||
1494             s->state == SOCKET_STOP_PRE_SIGTERM ||
1495             s->state == SOCKET_STOP_POST ||
1496             s->state == SOCKET_FINAL_SIGTERM ||
1497             s->state == SOCKET_FINAL_SIGKILL)
1498                 return -EAGAIN;
1499
1500         if (s->state == SOCKET_START_PRE ||
1501             s->state == SOCKET_START_POST)
1502                 return 0;
1503
1504         /* Cannot run this without the service being around */
1505         if (s->service) {
1506                 if (s->service->meta.load_state != UNIT_LOADED) {
1507                         log_error("Socket service %s not loaded, refusing.", s->service->meta.id);
1508                         return -ENOENT;
1509                 }
1510
1511                 /* If the service is already active we cannot start the
1512                  * socket */
1513                 if (s->service->state != SERVICE_DEAD &&
1514                     s->service->state != SERVICE_FAILED &&
1515                     s->service->state != SERVICE_AUTO_RESTART) {
1516                         log_error("Socket service %s already active, refusing.", s->service->meta.id);
1517                         return -EBUSY;
1518                 }
1519
1520 #ifdef HAVE_SYSV_COMPAT
1521                 if (s->service->sysv_path) {
1522                         log_error("Using SysV services for socket activation is not supported. Refusing.");
1523                         return -ENOENT;
1524                 }
1525 #endif
1526         }
1527
1528         assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1529
1530         s->failure = false;
1531         socket_enter_start_pre(s);
1532         return 0;
1533 }
1534
1535 static int socket_stop(Unit *u) {
1536         Socket *s = SOCKET(u);
1537
1538         assert(s);
1539
1540         /* Already on it */
1541         if (s->state == SOCKET_STOP_PRE ||
1542             s->state == SOCKET_STOP_PRE_SIGTERM ||
1543             s->state == SOCKET_STOP_PRE_SIGKILL ||
1544             s->state == SOCKET_STOP_POST ||
1545             s->state == SOCKET_FINAL_SIGTERM ||
1546             s->state == SOCKET_FINAL_SIGKILL)
1547                 return 0;
1548
1549         /* If there's already something running we go directly into
1550          * kill mode. */
1551         if (s->state == SOCKET_START_PRE ||
1552             s->state == SOCKET_START_POST) {
1553                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1554                 return -EAGAIN;
1555         }
1556
1557         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1558
1559         socket_enter_stop_pre(s, true);
1560         return 0;
1561 }
1562
1563 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1564         Socket *s = SOCKET(u);
1565         SocketPort *p;
1566         int r;
1567
1568         assert(u);
1569         assert(f);
1570         assert(fds);
1571
1572         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1573         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1574         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1575
1576         if (s->control_pid > 0)
1577                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1578
1579         if (s->control_command_id >= 0)
1580                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1581
1582         LIST_FOREACH(port, p, s->ports) {
1583                 int copy;
1584
1585                 if (p->fd < 0)
1586                         continue;
1587
1588                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1589                         return copy;
1590
1591                 if (p->type == SOCKET_SOCKET) {
1592                         char *t;
1593
1594                         if ((r = socket_address_print(&p->address, &t)) < 0)
1595                                 return r;
1596
1597                         if (socket_address_family(&p->address) == AF_NETLINK)
1598                                 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1599                         else
1600                                 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1601                         free(t);
1602                 } else if (p->type == SOCKET_SPECIAL)
1603                         unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1604                 else {
1605                         assert(p->type == SOCKET_FIFO);
1606                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1607                 }
1608         }
1609
1610         return 0;
1611 }
1612
1613 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1614         Socket *s = SOCKET(u);
1615
1616         assert(u);
1617         assert(key);
1618         assert(value);
1619         assert(fds);
1620
1621         if (streq(key, "state")) {
1622                 SocketState state;
1623
1624                 if ((state = socket_state_from_string(value)) < 0)
1625                         log_debug("Failed to parse state value %s", value);
1626                 else
1627                         s->deserialized_state = state;
1628         } else if (streq(key, "failure")) {
1629                 int b;
1630
1631                 if ((b = parse_boolean(value)) < 0)
1632                         log_debug("Failed to parse failure value %s", value);
1633                 else
1634                         s->failure = b || s->failure;
1635
1636         } else if (streq(key, "n-accepted")) {
1637                 unsigned k;
1638
1639                 if (safe_atou(value, &k) < 0)
1640                         log_debug("Failed to parse n-accepted value %s", value);
1641                 else
1642                         s->n_accepted += k;
1643         } else if (streq(key, "control-pid")) {
1644                 pid_t pid;
1645
1646                 if (parse_pid(value, &pid) < 0)
1647                         log_debug("Failed to parse control-pid value %s", value);
1648                 else
1649                         s->control_pid = pid;
1650         } else if (streq(key, "control-command")) {
1651                 SocketExecCommand id;
1652
1653                 if ((id = socket_exec_command_from_string(value)) < 0)
1654                         log_debug("Failed to parse exec-command value %s", value);
1655                 else {
1656                         s->control_command_id = id;
1657                         s->control_command = s->exec_command[id];
1658                 }
1659         } else if (streq(key, "fifo")) {
1660                 int fd, skip = 0;
1661                 SocketPort *p;
1662
1663                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1664                         log_debug("Failed to parse fifo value %s", value);
1665                 else {
1666
1667                         LIST_FOREACH(port, p, s->ports)
1668                                 if (p->type == SOCKET_FIFO &&
1669                                     streq_ptr(p->path, value+skip))
1670                                         break;
1671
1672                         if (p) {
1673                                 if (p->fd >= 0)
1674                                         close_nointr_nofail(p->fd);
1675                                 p->fd = fdset_remove(fds, fd);
1676                         }
1677                 }
1678
1679         } else if (streq(key, "special")) {
1680                 int fd, skip = 0;
1681                 SocketPort *p;
1682
1683                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1684                         log_debug("Failed to parse special value %s", value);
1685                 else {
1686
1687                         LIST_FOREACH(port, p, s->ports)
1688                                 if (p->type == SOCKET_SPECIAL &&
1689                                     streq_ptr(p->path, value+skip))
1690                                         break;
1691
1692                         if (p) {
1693                                 if (p->fd >= 0)
1694                                         close_nointr_nofail(p->fd);
1695                                 p->fd = fdset_remove(fds, fd);
1696                         }
1697                 }
1698
1699         } else if (streq(key, "socket")) {
1700                 int fd, type, skip = 0;
1701                 SocketPort *p;
1702
1703                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1704                         log_debug("Failed to parse socket value %s", value);
1705                 else {
1706
1707                         LIST_FOREACH(port, p, s->ports)
1708                                 if (socket_address_is(&p->address, value+skip, type))
1709                                         break;
1710
1711                         if (p) {
1712                                 if (p->fd >= 0)
1713                                         close_nointr_nofail(p->fd);
1714                                 p->fd = fdset_remove(fds, fd);
1715                         }
1716                 }
1717
1718         } else if (streq(key, "netlink")) {
1719                 int fd, skip = 0;
1720                 SocketPort *p;
1721
1722                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1723                         log_debug("Failed to parse socket value %s", value);
1724                 else {
1725
1726                         LIST_FOREACH(port, p, s->ports)
1727                                 if (socket_address_is_netlink(&p->address, value+skip))
1728                                         break;
1729
1730                         if (p) {
1731                                 if (p->fd >= 0)
1732                                         close_nointr_nofail(p->fd);
1733                                 p->fd = fdset_remove(fds, fd);
1734                         }
1735                 }
1736
1737         } else
1738                 log_debug("Unknown serialization key '%s'", key);
1739
1740         return 0;
1741 }
1742
1743 static UnitActiveState socket_active_state(Unit *u) {
1744         assert(u);
1745
1746         return state_translation_table[SOCKET(u)->state];
1747 }
1748
1749 static const char *socket_sub_state_to_string(Unit *u) {
1750         assert(u);
1751
1752         return socket_state_to_string(SOCKET(u)->state);
1753 }
1754
1755 static bool socket_check_gc(Unit *u) {
1756         Socket *s = SOCKET(u);
1757
1758         assert(u);
1759
1760         return s->n_connections > 0;
1761 }
1762
1763 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1764         Socket *s = SOCKET(u);
1765         int cfd = -1;
1766
1767         assert(s);
1768         assert(fd >= 0);
1769
1770         if (s->state != SOCKET_LISTENING)
1771                 return;
1772
1773         log_debug("Incoming traffic on %s", u->meta.id);
1774
1775         if (events != EPOLLIN) {
1776
1777                 if (events & EPOLLHUP)
1778                         log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->meta.id);
1779                 else
1780                         log_error("%s: Got unexpected poll event (0x%x) on socket.", u->meta.id, events);
1781
1782                 goto fail;
1783         }
1784
1785         if (w->socket_accept) {
1786                 for (;;) {
1787
1788                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1789
1790                                 if (errno == EINTR)
1791                                         continue;
1792
1793                                 log_error("Failed to accept socket: %m");
1794                                 goto fail;
1795                         }
1796
1797                         break;
1798                 }
1799
1800                 socket_apply_socket_options(s, cfd);
1801         }
1802
1803         socket_enter_running(s, cfd);
1804         return;
1805
1806 fail:
1807         socket_enter_stop_pre(s, false);
1808 }
1809
1810 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1811         Socket *s = SOCKET(u);
1812         bool success;
1813
1814         assert(s);
1815         assert(pid >= 0);
1816
1817         if (pid != s->control_pid)
1818                 return;
1819
1820         s->control_pid = 0;
1821
1822         success = is_clean_exit(code, status);
1823
1824         if (s->control_command) {
1825                 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1826
1827                 if (s->control_command->ignore)
1828                         success = true;
1829         }
1830
1831         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1832                  "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1833         s->failure = s->failure || !success;
1834
1835         if (s->control_command && s->control_command->command_next && success) {
1836                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1837                 socket_run_next(s, success);
1838         } else {
1839                 s->control_command = NULL;
1840                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1841
1842                 /* No further commands for this step, so let's figure
1843                  * out what to do next */
1844
1845                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1846
1847                 switch (s->state) {
1848
1849                 case SOCKET_START_PRE:
1850                         if (success)
1851                                 socket_enter_start_post(s);
1852                         else
1853                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1854                         break;
1855
1856                 case SOCKET_START_POST:
1857                         if (success)
1858                                 socket_enter_listening(s);
1859                         else
1860                                 socket_enter_stop_pre(s, false);
1861                         break;
1862
1863                 case SOCKET_STOP_PRE:
1864                 case SOCKET_STOP_PRE_SIGTERM:
1865                 case SOCKET_STOP_PRE_SIGKILL:
1866                         socket_enter_stop_post(s, success);
1867                         break;
1868
1869                 case SOCKET_STOP_POST:
1870                 case SOCKET_FINAL_SIGTERM:
1871                 case SOCKET_FINAL_SIGKILL:
1872                         socket_enter_dead(s, success);
1873                         break;
1874
1875                 default:
1876                         assert_not_reached("Uh, control process died at wrong time.");
1877                 }
1878         }
1879
1880         /* Notify clients about changed exit status */
1881         unit_add_to_dbus_queue(u);
1882 }
1883
1884 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1885         Socket *s = SOCKET(u);
1886
1887         assert(s);
1888         assert(elapsed == 1);
1889         assert(w == &s->timer_watch);
1890
1891         switch (s->state) {
1892
1893         case SOCKET_START_PRE:
1894                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1895                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1896                 break;
1897
1898         case SOCKET_START_POST:
1899                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1900                 socket_enter_stop_pre(s, false);
1901                 break;
1902
1903         case SOCKET_STOP_PRE:
1904                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1905                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1906                 break;
1907
1908         case SOCKET_STOP_PRE_SIGTERM:
1909                 if (s->exec_context.send_sigkill) {
1910                         log_warning("%s stopping timed out. Killing.", u->meta.id);
1911                         socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1912                 } else {
1913                         log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1914                         socket_enter_stop_post(s, false);
1915                 }
1916                 break;
1917
1918         case SOCKET_STOP_PRE_SIGKILL:
1919                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1920                 socket_enter_stop_post(s, false);
1921                 break;
1922
1923         case SOCKET_STOP_POST:
1924                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1925                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1926                 break;
1927
1928         case SOCKET_FINAL_SIGTERM:
1929                 if (s->exec_context.send_sigkill) {
1930                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1931                         socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1932                 } else {
1933                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
1934                         socket_enter_dead(s, false);
1935                 }
1936                 break;
1937
1938         case SOCKET_FINAL_SIGKILL:
1939                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
1940                 socket_enter_dead(s, false);
1941                 break;
1942
1943         default:
1944                 assert_not_reached("Timeout at wrong time.");
1945         }
1946 }
1947
1948 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1949         int *rfds;
1950         unsigned rn_fds, k;
1951         SocketPort *p;
1952
1953         assert(s);
1954         assert(fds);
1955         assert(n_fds);
1956
1957         /* Called from the service code for requesting our fds */
1958
1959         rn_fds = 0;
1960         LIST_FOREACH(port, p, s->ports)
1961                 if (p->fd >= 0)
1962                         rn_fds++;
1963
1964         if (!(rfds = new(int, rn_fds)))
1965                 return -ENOMEM;
1966
1967         k = 0;
1968         LIST_FOREACH(port, p, s->ports)
1969                 if (p->fd >= 0)
1970                         rfds[k++] = p->fd;
1971
1972         assert(k == rn_fds);
1973
1974         *fds = rfds;
1975         *n_fds = rn_fds;
1976
1977         return 0;
1978 }
1979
1980 void socket_notify_service_dead(Socket *s) {
1981         assert(s);
1982
1983         /* The service is dead. Dang!
1984          *
1985          * This is strictly for one-instance-for-all-connections
1986          * services. */
1987
1988         if (s->state == SOCKET_RUNNING) {
1989                 log_debug("%s got notified about service death.", s->meta.id);
1990                 socket_enter_listening(s);
1991         }
1992 }
1993
1994 void socket_connection_unref(Socket *s) {
1995         assert(s);
1996
1997         /* The service is dead. Yay!
1998          *
1999          * This is strictly for one-instance-per-connection
2000          * services. */
2001
2002         assert(s->n_connections > 0);
2003         s->n_connections--;
2004
2005         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
2006 }
2007
2008 static void socket_reset_failed(Unit *u) {
2009         Socket *s = SOCKET(u);
2010
2011         assert(s);
2012
2013         if (s->state == SOCKET_FAILED)
2014                 socket_set_state(s, SOCKET_DEAD);
2015
2016         s->failure = false;
2017 }
2018
2019 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2020         Socket *s = SOCKET(u);
2021         int r = 0;
2022         Set *pid_set = NULL;
2023
2024         assert(s);
2025
2026         if (who == KILL_MAIN) {
2027                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2028                 return -ESRCH;
2029         }
2030
2031         if (s->control_pid <= 0 && who == KILL_CONTROL) {
2032                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2033                 return -ESRCH;
2034         }
2035
2036         if (who == KILL_CONTROL || who == KILL_ALL)
2037                 if (s->control_pid > 0)
2038                         if (kill(s->control_pid, signo) < 0)
2039                                 r = -errno;
2040
2041         if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
2042                 int q;
2043
2044                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2045                         return -ENOMEM;
2046
2047                 /* Exclude the control pid from being killed via the cgroup */
2048                 if (s->control_pid > 0)
2049                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2050                                 r = q;
2051                                 goto finish;
2052                         }
2053
2054                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
2055                         if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
2056                                 r = q;
2057         }
2058
2059 finish:
2060         if (pid_set)
2061                 set_free(pid_set);
2062
2063         return r;
2064 }
2065
2066 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2067         [SOCKET_DEAD] = "dead",
2068         [SOCKET_START_PRE] = "start-pre",
2069         [SOCKET_START_POST] = "start-post",
2070         [SOCKET_LISTENING] = "listening",
2071         [SOCKET_RUNNING] = "running",
2072         [SOCKET_STOP_PRE] = "stop-pre",
2073         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2074         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2075         [SOCKET_STOP_POST] = "stop-post",
2076         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2077         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2078         [SOCKET_FAILED] = "failed"
2079 };
2080
2081 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2082
2083 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2084         [SOCKET_EXEC_START_PRE] = "StartPre",
2085         [SOCKET_EXEC_START_POST] = "StartPost",
2086         [SOCKET_EXEC_STOP_PRE] = "StopPre",
2087         [SOCKET_EXEC_STOP_POST] = "StopPost"
2088 };
2089
2090 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2091
2092 const UnitVTable socket_vtable = {
2093         .suffix = ".socket",
2094         .sections =
2095                 "Unit\0"
2096                 "Socket\0"
2097                 "Install\0",
2098
2099         .init = socket_init,
2100         .done = socket_done,
2101         .load = socket_load,
2102
2103         .kill = socket_kill,
2104
2105         .coldplug = socket_coldplug,
2106
2107         .dump = socket_dump,
2108
2109         .start = socket_start,
2110         .stop = socket_stop,
2111
2112         .serialize = socket_serialize,
2113         .deserialize_item = socket_deserialize_item,
2114
2115         .active_state = socket_active_state,
2116         .sub_state_to_string = socket_sub_state_to_string,
2117
2118         .check_gc = socket_check_gc,
2119
2120         .fd_event = socket_fd_event,
2121         .sigchld_event = socket_sigchld_event,
2122         .timer_event = socket_timer_event,
2123
2124         .reset_failed = socket_reset_failed,
2125
2126         .bus_interface = "org.freedesktop.systemd1.Socket",
2127         .bus_message_handler = bus_socket_message_handler,
2128         .bus_invalidating_properties =  bus_socket_invalidating_properties
2129 };