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->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->manager->default_std_output;
  83         s->exec_context.std_error = u->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
 102         assert(s);
 103
 104         while ((p = s->ports)) {
 105                 LIST_REMOVE(SocketPort, port, s->ports, p);
 106
 107                 if (p->fd >= 0) {
 108                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 109                         close_nointr_nofail(p->fd);
 110                 }
 111
 112                 free(p->path);
 113                 free(p);
 114         }
 115
 116         exec_context_done(&s->exec_context);
 117         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 118         s->control_command = NULL;
 119
 120         socket_unwatch_control_pid(s);
 121
 122         unit_ref_unset(&s->service);
 123
 124         free(s->tcp_congestion);
 125         s->tcp_congestion = NULL;
 126
 127         free(s->bind_to_device);
 128         s->bind_to_device = NULL;
 129
 130         unit_unwatch_timer(u, &s->timer_watch);
 131 }
 132
 133 static int socket_instantiate_service(Socket *s) {
 134         char *prefix, *name;
 135         int r;
 136         Unit *u;
 137
 138         assert(s);
 139
 140         /* This fills in s->service if it isn't filled in yet. For
 141          * Accept=yes sockets we create the next connection service
 142          * here. For Accept=no this is mostly a NOP since the service
 143          * is figured out at load time anyway. */
 144
 145         if (UNIT_DEREF(s->service))
 146                 return 0;
 147
 148         assert(s->accept);
 149
 150         if (!(prefix = unit_name_to_prefix(UNIT(s)->id)))
 151                 return -ENOMEM;
 152
 153         r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
 154         free(prefix);
 155
 156         if (r < 0)
 157                 return -ENOMEM;
 158
 159         r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
 160         free(name);
 161
 162         if (r < 0)
 163                 return r;
 164
 165 #ifdef HAVE_SYSV_COMPAT
 166         if (SERVICE(u)->sysv_path) {
 167                 log_error("Using SysV services for socket activation is not supported. Refusing.");
 168                 return -ENOENT;
 169         }
 170 #endif
 171
 172         u->no_gc = true;
 173         unit_ref_set(&s->service, u);
 174
 175         return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
 176 }
 177
 178 static bool have_non_accept_socket(Socket *s) {
 179         SocketPort *p;
 180
 181         assert(s);
 182
 183         if (!s->accept)
 184                 return true;
 185
 186         LIST_FOREACH(port, p, s->ports) {
 187
 188                 if (p->type != SOCKET_SOCKET)
 189                         return true;
 190
 191                 if (!socket_address_can_accept(&p->address))
 192                         return true;
 193         }
 194
 195         return false;
 196 }
 197
 198 static int socket_verify(Socket *s) {
 199         assert(s);
 200
 201         if (UNIT(s)->load_state != UNIT_LOADED)
 202                 return 0;
 203
 204         if (!s->ports) {
 205                 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->id);
 206                 return -EINVAL;
 207         }
 208
 209         if (s->accept && have_non_accept_socket(s)) {
 210                 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", UNIT(s)->id);
 211                 return -EINVAL;
 212         }
 213
 214         if (s->accept && s->max_connections <= 0) {
 215                 log_error("%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
 216                 return -EINVAL;
 217         }
 218
 219         if (s->accept && UNIT_DEREF(s->service)) {
 220                 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id);
 221                 return -EINVAL;
 222         }
 223
 224         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 225                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
 226                 return -EINVAL;
 227         }
 228
 229         return 0;
 230 }
 231
 232 static bool socket_needs_mount(Socket *s, const char *prefix) {
 233         SocketPort *p;
 234
 235         assert(s);
 236
 237         LIST_FOREACH(port, p, s->ports) {
 238
 239                 if (p->type == SOCKET_SOCKET) {
 240                         if (socket_address_needs_mount(&p->address, prefix))
 241                                 return true;
 242                 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
 243                         if (path_startswith(p->path, prefix))
 244                                 return true;
 245                 }
 246         }
 247
 248         return false;
 249 }
 250
 251 int socket_add_one_mount_link(Socket *s, Mount *m) {
 252         int r;
 253
 254         assert(s);
 255         assert(m);
 256
 257         if (UNIT(s)->load_state != UNIT_LOADED ||
 258             UNIT(m)->load_state != UNIT_LOADED)
 259                 return 0;
 260
 261         if (!socket_needs_mount(s, m->where))
 262                 return 0;
 263
 264         if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
 265                 return r;
 266
 267         return 0;
 268 }
 269
 270 static int socket_add_mount_links(Socket *s) {
 271         Unit *other;
 272         int r;
 273
 274         assert(s);
 275
 276         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT])
 277                 if ((r = socket_add_one_mount_link(s, MOUNT(other))) < 0)
 278                         return r;
 279
 280         return 0;
 281 }
 282
 283 static int socket_add_device_link(Socket *s) {
 284         char *t;
 285         int r;
 286
 287         assert(s);
 288
 289         if (!s->bind_to_device)
 290                 return 0;
 291
 292         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 293                 return -ENOMEM;
 294
 295         r = unit_add_node_link(UNIT(s), t, false);
 296         free(t);
 297
 298         return r;
 299 }
 300
 301 static int socket_add_default_dependencies(Socket *s) {
 302         int r;
 303         assert(s);
 304
 305         if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
 306                 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 307                         return r;
 308
 309                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
 310                         return r;
 311         }
 312
 313         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 314 }
 315
 316 static bool socket_has_exec(Socket *s) {
 317         unsigned i;
 318         assert(s);
 319
 320         for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
 321                 if (s->exec_command[i])
 322                         return true;
 323
 324         return false;
 325 }
 326
 327 static int socket_load(Unit *u) {
 328         Socket *s = SOCKET(u);
 329         int r;
 330
 331         assert(u);
 332         assert(u->load_state == UNIT_STUB);
 333
 334         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 335                 return r;
 336
 337         /* This is a new unit? Then let's add in some extras */
 338         if (u->load_state == UNIT_LOADED) {
 339
 340                 if (have_non_accept_socket(s)) {
 341
 342                         if (!UNIT_DEREF(s->service)) {
 343                                 Unit *x;
 344
 345                                 r = unit_load_related_unit(u, ".service", &x);
 346                                 if (r < 0)
 347                                         return r;
 348
 349                                 unit_ref_set(&s->service, x);
 350                         }
 351
 352                         r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
 353                         if (r < 0)
 354                                 return r;
 355                 }
 356
 357                 if ((r = socket_add_mount_links(s)) < 0)
 358                         return r;
 359
 360                 if ((r = socket_add_device_link(s)) < 0)
 361                         return r;
 362
 363                 if (socket_has_exec(s))
 364                         if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 365                                 return r;
 366
 367                 if ((r = unit_add_default_cgroups(u)) < 0)
 368                         return r;
 369
 370                 if (UNIT(s)->default_dependencies)
 371                         if ((r = socket_add_default_dependencies(s)) < 0)
 372                                 return r;
 373         }
 374
 375         return socket_verify(s);
 376 }
 377
 378 static const char* listen_lookup(int family, int type) {
 379
 380         if (family == AF_NETLINK)
 381                 return "ListenNetlink";
 382
 383         if (type == SOCK_STREAM)
 384                 return "ListenStream";
 385         else if (type == SOCK_DGRAM)
 386                 return "ListenDatagram";
 387         else if (type == SOCK_SEQPACKET)
 388                 return "ListenSequentialPacket";
 389
 390         assert_not_reached("Unknown socket type");
 391         return NULL;
 392 }
 393
 394 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 395
 396         SocketExecCommand c;
 397         Socket *s = SOCKET(u);
 398         SocketPort *p;
 399         const char *prefix2;
 400         char *p2;
 401
 402         assert(s);
 403         assert(f);
 404
 405         p2 = strappend(prefix, "\t");
 406         prefix2 = p2 ? p2 : prefix;
 407
 408         fprintf(f,
 409                 "%sSocket State: %s\n"
 410                 "%sResult: %s\n"
 411                 "%sBindIPv6Only: %s\n"
 412                 "%sBacklog: %u\n"
 413                 "%sSocketMode: %04o\n"
 414                 "%sDirectoryMode: %04o\n"
 415                 "%sKeepAlive: %s\n"
 416                 "%sFreeBind: %s\n"
 417                 "%sTransparent: %s\n"
 418                 "%sBroadcast: %s\n"
 419                 "%sPassCredentials: %s\n"
 420                 "%sPassSecurity: %s\n"
 421                 "%sTCPCongestion: %s\n",
 422                 prefix, socket_state_to_string(s->state),
 423                 prefix, socket_result_to_string(s->result),
 424                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 425                 prefix, s->backlog,
 426                 prefix, s->socket_mode,
 427                 prefix, s->directory_mode,
 428                 prefix, yes_no(s->keep_alive),
 429                 prefix, yes_no(s->free_bind),
 430                 prefix, yes_no(s->transparent),
 431                 prefix, yes_no(s->broadcast),
 432                 prefix, yes_no(s->pass_cred),
 433                 prefix, yes_no(s->pass_sec),
 434                 prefix, strna(s->tcp_congestion));
 435
 436         if (s->control_pid > 0)
 437                 fprintf(f,
 438                         "%sControl PID: %lu\n",
 439                         prefix, (unsigned long) s->control_pid);
 440
 441         if (s->bind_to_device)
 442                 fprintf(f,
 443                         "%sBindToDevice: %s\n",
 444                         prefix, s->bind_to_device);
 445
 446         if (s->accept)
 447                 fprintf(f,
 448                         "%sAccepted: %u\n"
 449                         "%sNConnections: %u\n"
 450                         "%sMaxConnections: %u\n",
 451                         prefix, s->n_accepted,
 452                         prefix, s->n_connections,
 453                         prefix, s->max_connections);
 454
 455         if (s->priority >= 0)
 456                 fprintf(f,
 457                         "%sPriority: %i\n",
 458                         prefix, s->priority);
 459
 460         if (s->receive_buffer > 0)
 461                 fprintf(f,
 462                         "%sReceiveBuffer: %zu\n",
 463                         prefix, s->receive_buffer);
 464
 465         if (s->send_buffer > 0)
 466                 fprintf(f,
 467                         "%sSendBuffer: %zu\n",
 468                         prefix, s->send_buffer);
 469
 470         if (s->ip_tos >= 0)
 471                 fprintf(f,
 472                         "%sIPTOS: %i\n",
 473                         prefix, s->ip_tos);
 474
 475         if (s->ip_ttl >= 0)
 476                 fprintf(f,
 477                         "%sIPTTL: %i\n",
 478                         prefix, s->ip_ttl);
 479
 480         if (s->pipe_size > 0)
 481                 fprintf(f,
 482                         "%sPipeSize: %zu\n",
 483                         prefix, s->pipe_size);
 484
 485         if (s->mark >= 0)
 486                 fprintf(f,
 487                         "%sMark: %i\n",
 488                         prefix, s->mark);
 489
 490         if (s->mq_maxmsg > 0)
 491                 fprintf(f,
 492                         "%sMessageQueueMaxMessages: %li\n",
 493                         prefix, s->mq_maxmsg);
 494
 495         if (s->mq_msgsize > 0)
 496                 fprintf(f,
 497                         "%sMessageQueueMessageSize: %li\n",
 498                         prefix, s->mq_msgsize);
 499
 500         LIST_FOREACH(port, p, s->ports) {
 501
 502                 if (p->type == SOCKET_SOCKET) {
 503                         const char *t;
 504                         int r;
 505                         char *k = NULL;
 506
 507                         if ((r = socket_address_print(&p->address, &k)) < 0)
 508                                 t = strerror(-r);
 509                         else
 510                                 t = k;
 511
 512                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
 513                         free(k);
 514                 } else if (p->type == SOCKET_SPECIAL)
 515                         fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
 516                 else if (p->type == SOCKET_MQUEUE)
 517                         fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
 518                 else
 519                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 520         }
 521
 522         exec_context_dump(&s->exec_context, f, prefix);
 523
 524         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 525                 if (!s->exec_command[c])
 526                         continue;
 527
 528                 fprintf(f, "%s-> %s:\n",
 529                         prefix, socket_exec_command_to_string(c));
 530
 531                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 532         }
 533
 534         free(p2);
 535 }
 536
 537 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 538         socklen_t l;
 539         char *r;
 540         union {
 541                 struct sockaddr sa;
 542                 struct sockaddr_un un;
 543                 struct sockaddr_in in;
 544                 struct sockaddr_in6 in6;
 545                 struct sockaddr_storage storage;
 546         } local, remote;
 547
 548         assert(fd >= 0);
 549         assert(instance);
 550
 551         l = sizeof(local);
 552         if (getsockname(fd, &local.sa, &l) < 0)
 553                 return -errno;
 554
 555         l = sizeof(remote);
 556         if (getpeername(fd, &remote.sa, &l) < 0)
 557                 return -errno;
 558
 559         switch (local.sa.sa_family) {
 560
 561         case AF_INET: {
 562                 uint32_t
 563                         a = ntohl(local.in.sin_addr.s_addr),
 564                         b = ntohl(remote.in.sin_addr.s_addr);
 565
 566                 if (asprintf(&r,
 567                              "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 568                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 569                              ntohs(local.in.sin_port),
 570                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 571                              ntohs(remote.in.sin_port)) < 0)
 572                         return -ENOMEM;
 573
 574                 break;
 575         }
 576
 577         case AF_INET6: {
 578                 static const char ipv4_prefix[] = {
 579                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 580                 };
 581
 582                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 583                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 584                         const uint8_t
 585                                 *a = local.in6.sin6_addr.s6_addr+12,
 586                                 *b = remote.in6.sin6_addr.s6_addr+12;
 587
 588                         if (asprintf(&r,
 589                                      "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 590                                      a[0], a[1], a[2], a[3],
 591                                      ntohs(local.in6.sin6_port),
 592                                      b[0], b[1], b[2], b[3],
 593                                      ntohs(remote.in6.sin6_port)) < 0)
 594                                 return -ENOMEM;
 595                 } else {
 596                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 597
 598                         if (asprintf(&r,
 599                                      "%s:%u-%s:%u",
 600                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 601                                      ntohs(local.in6.sin6_port),
 602                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 603                                      ntohs(remote.in6.sin6_port)) < 0)
 604                                 return -ENOMEM;
 605                 }
 606
 607                 break;
 608         }
 609
 610         case AF_UNIX: {
 611                 struct ucred ucred;
 612
 613                 l = sizeof(ucred);
 614                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 615                         return -errno;
 616
 617                 if (asprintf(&r,
 618                              "%u-%lu-%lu",
 619                              nr,
 620                              (unsigned long) ucred.pid,
 621                              (unsigned long) ucred.uid) < 0)
 622                         return -ENOMEM;
 623
 624                 break;
 625         }
 626
 627         default:
 628                 assert_not_reached("Unhandled socket type.");
 629         }
 630
 631         *instance = r;
 632         return 0;
 633 }
 634
 635 static void socket_close_fds(Socket *s) {
 636         SocketPort *p;
 637
 638         assert(s);
 639
 640         LIST_FOREACH(port, p, s->ports) {
 641                 if (p->fd < 0)
 642                         continue;
 643
 644                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 645                 close_nointr_nofail(p->fd);
 646
 647                 /* One little note: we should never delete any sockets
 648                  * in the file system here! After all some other
 649                  * process we spawned might still have a reference of
 650                  * this fd and wants to continue to use it. Therefore
 651                  * we delete sockets in the file system before we
 652                  * create a new one, not after we stopped using
 653                  * one! */
 654
 655                 p->fd = -1;
 656         }
 657 }
 658
 659 static void socket_apply_socket_options(Socket *s, int fd) {
 660         assert(s);
 661         assert(fd >= 0);
 662
 663         if (s->keep_alive) {
 664                 int b = s->keep_alive;
 665                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 666                         log_warning("SO_KEEPALIVE failed: %m");
 667         }
 668
 669         if (s->broadcast) {
 670                 int one = 1;
 671                 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
 672                         log_warning("SO_BROADCAST failed: %m");
 673         }
 674
 675         if (s->pass_cred) {
 676                 int one = 1;
 677                 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
 678                         log_warning("SO_PASSCRED failed: %m");
 679         }
 680
 681         if (s->pass_sec) {
 682                 int one = 1;
 683                 if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
 684                         log_warning("SO_PASSSEC failed: %m");
 685         }
 686
 687         if (s->priority >= 0)
 688                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 689                         log_warning("SO_PRIORITY failed: %m");
 690
 691         if (s->receive_buffer > 0) {
 692                 int value = (int) s->receive_buffer;
 693
 694                 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
 695
 696                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
 697                         if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
 698                                 log_warning("SO_RCVBUF failed: %m");
 699         }
 700
 701         if (s->send_buffer > 0) {
 702                 int value = (int) s->send_buffer;
 703                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
 704                         if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
 705                                 log_warning("SO_SNDBUF failed: %m");
 706         }
 707
 708         if (s->mark >= 0)
 709                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 710                         log_warning("SO_MARK failed: %m");
 711
 712         if (s->ip_tos >= 0)
 713                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 714                         log_warning("IP_TOS failed: %m");
 715
 716         if (s->ip_ttl >= 0) {
 717                 int r, x;
 718
 719                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
 720
 721                 if (socket_ipv6_is_supported())
 722                         x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
 723                 else {
 724                         x = -1;
 725                         errno = EAFNOSUPPORT;
 726                 }
 727
 728                 if (r < 0 && x < 0)
 729                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
 730         }
 731
 732         if (s->tcp_congestion)
 733                 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
 734                         log_warning("TCP_CONGESTION failed: %m");
 735 }
 736
 737 static void socket_apply_fifo_options(Socket *s, int fd) {
 738         assert(s);
 739         assert(fd >= 0);
 740
 741         if (s->pipe_size > 0)
 742                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 743                         log_warning("F_SETPIPE_SZ: %m");
 744 }
 745
 746 static int fifo_address_create(
 747                 const char *path,
 748                 mode_t directory_mode,
 749                 mode_t socket_mode,
 750                 int *_fd) {
 751
 752         int fd = -1, r = 0;
 753         struct stat st;
 754         mode_t old_mask;
 755
 756         assert(path);
 757         assert(_fd);
 758
 759         mkdir_parents(path, directory_mode);
 760
 761         if ((r = label_fifofile_set(path)) < 0)
 762                 goto fail;
 763
 764         /* Enforce the right access mode for the fifo */
 765         old_mask = umask(~ socket_mode);
 766
 767         /* Include the original umask in our mask */
 768         umask(~socket_mode | old_mask);
 769
 770         r = mkfifo(path, socket_mode);
 771         umask(old_mask);
 772
 773         if (r < 0 && errno != EEXIST) {
 774                 r = -errno;
 775                 goto fail;
 776         }
 777
 778         if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 779                 r = -errno;
 780                 goto fail;
 781         }
 782
 783         label_file_clear();
 784
 785         if (fstat(fd, &st) < 0) {
 786                 r = -errno;
 787                 goto fail;
 788         }
 789
 790         if (!S_ISFIFO(st.st_mode) ||
 791             (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
 792             st.st_uid != getuid() ||
 793             st.st_gid != getgid()) {
 794
 795                 r = -EEXIST;
 796                 goto fail;
 797         }
 798
 799         *_fd = fd;
 800         return 0;
 801
 802 fail:
 803         label_file_clear();
 804
 805         if (fd >= 0)
 806                 close_nointr_nofail(fd);
 807
 808         return r;
 809 }
 810
 811 static int special_address_create(
 812                 const char *path,
 813                 int *_fd) {
 814
 815         int fd = -1, r = 0;
 816         struct stat st;
 817
 818         assert(path);
 819         assert(_fd);
 820
 821         if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 822                 r = -errno;
 823                 goto fail;
 824         }
 825
 826         if (fstat(fd, &st) < 0) {
 827                 r = -errno;
 828                 goto fail;
 829         }
 830
 831         /* Check whether this is a /proc, /sys or /dev file or char device */
 832         if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
 833                 r = -EEXIST;
 834                 goto fail;
 835         }
 836
 837         *_fd = fd;
 838         return 0;
 839
 840 fail:
 841         if (fd >= 0)
 842                 close_nointr_nofail(fd);
 843
 844         return r;
 845 }
 846
 847 static int mq_address_create(
 848                 const char *path,
 849                 mode_t mq_mode,
 850                 long maxmsg,
 851                 long msgsize,
 852                 int *_fd) {
 853
 854         int fd = -1, r = 0;
 855         struct stat st;
 856         mode_t old_mask;
 857         struct mq_attr _attr, *attr = NULL;
 858
 859         assert(path);
 860         assert(_fd);
 861
 862         if (maxmsg > 0 && msgsize > 0) {
 863                 zero(_attr);
 864                 _attr.mq_flags = O_NONBLOCK;
 865                 _attr.mq_maxmsg = maxmsg;
 866                 _attr.mq_msgsize = msgsize;
 867                 attr = &_attr;
 868         }
 869
 870         /* Enforce the right access mode for the mq */
 871         old_mask = umask(~ mq_mode);
 872
 873         /* Include the original umask in our mask */
 874         umask(~mq_mode | old_mask);
 875
 876         fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
 877         umask(old_mask);
 878
 879         if (fd < 0) {
 880                 r = -errno;
 881                 goto fail;
 882         }
 883
 884         if (fstat(fd, &st) < 0) {
 885                 r = -errno;
 886                 goto fail;
 887         }
 888
 889         if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
 890             st.st_uid != getuid() ||
 891             st.st_gid != getgid()) {
 892
 893                 r = -EEXIST;
 894                 goto fail;
 895         }
 896
 897         *_fd = fd;
 898         return 0;
 899
 900 fail:
 901         if (fd >= 0)
 902                 close_nointr_nofail(fd);
 903
 904         return r;
 905 }
 906
 907 static int socket_open_fds(Socket *s) {
 908         SocketPort *p;
 909         int r;
 910         char *label = NULL;
 911         bool know_label = false;
 912
 913         assert(s);
 914
 915         LIST_FOREACH(port, p, s->ports) {
 916
 917                 if (p->fd >= 0)
 918                         continue;
 919
 920                 if (p->type == SOCKET_SOCKET) {
 921
 922                         if (!know_label) {
 923
 924                                 if ((r = socket_instantiate_service(s)) < 0)
 925                                         return r;
 926
 927                                 if (UNIT_DEREF(s->service) &&
 928                                     SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
 929                                         r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
 930
 931                                         if (r < 0) {
 932                                                 if (r != -EPERM)
 933                                                         return r;
 934                                         }
 935                                 }
 936
 937                                 know_label = true;
 938                         }
 939
 940                         if ((r = socket_address_listen(
 941                                              &p->address,
 942                                              s->backlog,
 943                                              s->bind_ipv6_only,
 944                                              s->bind_to_device,
 945                                              s->free_bind,
 946                                              s->transparent,
 947                                              s->directory_mode,
 948                                              s->socket_mode,
 949                                              label,
 950                                              &p->fd)) < 0)
 951                                 goto rollback;
 952
 953                         socket_apply_socket_options(s, p->fd);
 954
 955                 } else  if (p->type == SOCKET_SPECIAL) {
 956
 957                         if ((r = special_address_create(
 958                                              p->path,
 959                                              &p->fd)) < 0)
 960                                 goto rollback;
 961
 962                 } else  if (p->type == SOCKET_FIFO) {
 963
 964                         if ((r = fifo_address_create(
 965                                              p->path,
 966                                              s->directory_mode,
 967                                              s->socket_mode,
 968                                              &p->fd)) < 0)
 969                                 goto rollback;
 970
 971                         socket_apply_fifo_options(s, p->fd);
 972                 } else if (p->type == SOCKET_MQUEUE) {
 973
 974                         if ((r = mq_address_create(
 975                                              p->path,
 976                                              s->socket_mode,
 977                                              s->mq_maxmsg,
 978                                              s->mq_msgsize,
 979                                              &p->fd)) < 0)
 980                                 goto rollback;
 981                 } else
 982                         assert_not_reached("Unknown port type");
 983         }
 984
 985         label_free(label);
 986         return 0;
 987
 988 rollback:
 989         socket_close_fds(s);
 990         label_free(label);
 991         return r;
 992 }
 993
 994 static void socket_unwatch_fds(Socket *s) {
 995         SocketPort *p;
 996
 997         assert(s);
 998
 999         LIST_FOREACH(port, p, s->ports) {
1000                 if (p->fd < 0)
1001                         continue;
1002
1003                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
1004         }
1005 }
1006
1007 static int socket_watch_fds(Socket *s) {
1008         SocketPort *p;
1009         int r;
1010
1011         assert(s);
1012
1013         LIST_FOREACH(port, p, s->ports) {
1014                 if (p->fd < 0)
1015                         continue;
1016
1017                 p->fd_watch.socket_accept =
1018                         s->accept &&
1019                         p->type == SOCKET_SOCKET &&
1020                         socket_address_can_accept(&p->address);
1021
1022                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
1023                         goto fail;
1024         }
1025
1026         return 0;
1027
1028 fail:
1029         socket_unwatch_fds(s);
1030         return r;
1031 }
1032
1033 static void socket_set_state(Socket *s, SocketState state) {
1034         SocketState old_state;
1035         assert(s);
1036
1037         old_state = s->state;
1038         s->state = state;
1039
1040         if (state != SOCKET_START_PRE &&
1041             state != SOCKET_START_POST &&
1042             state != SOCKET_STOP_PRE &&
1043             state != SOCKET_STOP_PRE_SIGTERM &&
1044             state != SOCKET_STOP_PRE_SIGKILL &&
1045             state != SOCKET_STOP_POST &&
1046             state != SOCKET_FINAL_SIGTERM &&
1047             state != SOCKET_FINAL_SIGKILL) {
1048                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1049                 socket_unwatch_control_pid(s);
1050                 s->control_command = NULL;
1051                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1052         }
1053
1054         if (state != SOCKET_LISTENING)
1055                 socket_unwatch_fds(s);
1056
1057         if (state != SOCKET_START_POST &&
1058             state != SOCKET_LISTENING &&
1059             state != SOCKET_RUNNING &&
1060             state != SOCKET_STOP_PRE &&
1061             state != SOCKET_STOP_PRE_SIGTERM &&
1062             state != SOCKET_STOP_PRE_SIGKILL)
1063                 socket_close_fds(s);
1064
1065         if (state != old_state)
1066                 log_debug("%s changed %s -> %s",
1067                           UNIT(s)->id,
1068                           socket_state_to_string(old_state),
1069                           socket_state_to_string(state));
1070
1071         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1072 }
1073
1074 static int socket_coldplug(Unit *u) {
1075         Socket *s = SOCKET(u);
1076         int r;
1077
1078         assert(s);
1079         assert(s->state == SOCKET_DEAD);
1080
1081         if (s->deserialized_state != s->state) {
1082
1083                 if (s->deserialized_state == SOCKET_START_PRE ||
1084                     s->deserialized_state == SOCKET_START_POST ||
1085                     s->deserialized_state == SOCKET_STOP_PRE ||
1086                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1087                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1088                     s->deserialized_state == SOCKET_STOP_POST ||
1089                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1090                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1091
1092                         if (s->control_pid <= 0)
1093                                 return -EBADMSG;
1094
1095                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1096                                 return r;
1097
1098                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1099                                 return r;
1100                 }
1101
1102                 if (s->deserialized_state == SOCKET_START_POST ||
1103                     s->deserialized_state == SOCKET_LISTENING ||
1104                     s->deserialized_state == SOCKET_RUNNING ||
1105                     s->deserialized_state == SOCKET_STOP_PRE ||
1106                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1107                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1108                         if ((r = socket_open_fds(s)) < 0)
1109                                 return r;
1110
1111                 if (s->deserialized_state == SOCKET_LISTENING)
1112                         if ((r = socket_watch_fds(s)) < 0)
1113                                 return r;
1114
1115                 socket_set_state(s, s->deserialized_state);
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1122         pid_t pid;
1123         int r;
1124         char **argv;
1125
1126         assert(s);
1127         assert(c);
1128         assert(_pid);
1129
1130         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1131                 goto fail;
1132
1133         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1134                 r = -ENOMEM;
1135                 goto fail;
1136         }
1137
1138         r = exec_spawn(c,
1139                        argv,
1140                        &s->exec_context,
1141                        NULL, 0,
1142                        UNIT(s)->manager->environment,
1143                        true,
1144                        true,
1145                        true,
1146                        UNIT(s)->manager->confirm_spawn,
1147                        UNIT(s)->cgroup_bondings,
1148                        UNIT(s)->cgroup_attributes,
1149                        &pid);
1150
1151         strv_free(argv);
1152         if (r < 0)
1153                 goto fail;
1154
1155         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1156                 /* FIXME: we need to do something here */
1157                 goto fail;
1158
1159         *_pid = pid;
1160
1161         return 0;
1162
1163 fail:
1164         unit_unwatch_timer(UNIT(s), &s->timer_watch);
1165
1166         return r;
1167 }
1168
1169 static void socket_enter_dead(Socket *s, SocketResult f) {
1170         assert(s);
1171
1172         if (f != SOCKET_SUCCESS)
1173                 s->result = f;
1174
1175         socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
1176 }
1177
1178 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
1179
1180 static void socket_enter_stop_post(Socket *s, SocketResult f) {
1181         int r;
1182         assert(s);
1183
1184         if (f != SOCKET_SUCCESS)
1185                 s->result = f;
1186
1187         socket_unwatch_control_pid(s);
1188
1189         s->control_command_id = SOCKET_EXEC_STOP_POST;
1190
1191         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1192                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1193                         goto fail;
1194
1195                 socket_set_state(s, SOCKET_STOP_POST);
1196         } else
1197                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
1198
1199         return;
1200
1201 fail:
1202         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1203         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1204 }
1205
1206 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
1207         int r;
1208         Set *pid_set = NULL;
1209         bool wait_for_exit = false;
1210
1211         assert(s);
1212
1213         if (f != SOCKET_SUCCESS)
1214                 s->result = f;
1215
1216         if (s->exec_context.kill_mode != KILL_NONE) {
1217                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1218
1219                 if (s->control_pid > 0) {
1220                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1221
1222                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1223                         else
1224                                 wait_for_exit = true;
1225                 }
1226
1227                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1228
1229                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1230                                 r = -ENOMEM;
1231                                 goto fail;
1232                         }
1233
1234                         /* Exclude the control pid from being killed via the cgroup */
1235                         if (s->control_pid > 0)
1236                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1237                                         goto fail;
1238
1239                         if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1240                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1241                                         log_warning("Failed to kill control group: %s", strerror(-r));
1242                         } else if (r > 0)
1243                                 wait_for_exit = true;
1244
1245                         set_free(pid_set);
1246                         pid_set = NULL;
1247                 }
1248         }
1249
1250         if (wait_for_exit) {
1251                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1252                         goto fail;
1253
1254                 socket_set_state(s, state);
1255         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1256                 socket_enter_stop_post(s, SOCKET_SUCCESS);
1257         else
1258                 socket_enter_dead(s, SOCKET_SUCCESS);
1259
1260         return;
1261
1262 fail:
1263         log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1264
1265         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1266                 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1267         else
1268                 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1269
1270         if (pid_set)
1271                 set_free(pid_set);
1272 }
1273
1274 static void socket_enter_stop_pre(Socket *s, SocketResult f) {
1275         int r;
1276         assert(s);
1277
1278         if (f != SOCKET_SUCCESS)
1279                 s->result = f;
1280
1281         socket_unwatch_control_pid(s);
1282
1283         s->control_command_id = SOCKET_EXEC_STOP_PRE;
1284
1285         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1286                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1287                         goto fail;
1288
1289                 socket_set_state(s, SOCKET_STOP_PRE);
1290         } else
1291                 socket_enter_stop_post(s, SOCKET_SUCCESS);
1292
1293         return;
1294
1295 fail:
1296         log_warning("%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r));
1297         socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1298 }
1299
1300 static void socket_enter_listening(Socket *s) {
1301         int r;
1302         assert(s);
1303
1304         r = socket_watch_fds(s);
1305         if (r < 0) {
1306                 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1307                 goto fail;
1308         }
1309
1310         socket_set_state(s, SOCKET_LISTENING);
1311         return;
1312
1313 fail:
1314         socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1315 }
1316
1317 static void socket_enter_start_post(Socket *s) {
1318         int r;
1319         assert(s);
1320
1321         r = socket_open_fds(s);
1322         if (r < 0) {
1323                 log_warning("%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
1324                 goto fail;
1325         }
1326
1327         socket_unwatch_control_pid(s);
1328
1329         s->control_command_id = SOCKET_EXEC_START_POST;
1330
1331         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1332                 r = socket_spawn(s, s->control_command, &s->control_pid);
1333                 if (r < 0) {
1334                         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
1335                         goto fail;
1336                 }
1337
1338                 socket_set_state(s, SOCKET_START_POST);
1339         } else
1340                 socket_enter_listening(s);
1341
1342         return;
1343
1344 fail:
1345         socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1346 }
1347
1348 static void socket_enter_start_pre(Socket *s) {
1349         int r;
1350         assert(s);
1351
1352         socket_unwatch_control_pid(s);
1353
1354         s->control_command_id = SOCKET_EXEC_START_PRE;
1355
1356         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1357                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1358                         goto fail;
1359
1360                 socket_set_state(s, SOCKET_START_PRE);
1361         } else
1362                 socket_enter_start_post(s);
1363
1364         return;
1365
1366 fail:
1367         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
1368         socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1369 }
1370
1371 static void socket_enter_running(Socket *s, int cfd) {
1372         int r;
1373         DBusError error;
1374
1375         assert(s);
1376         dbus_error_init(&error);
1377
1378         /* We don't take connections anymore if we are supposed to
1379          * shut down anyway */
1380         if (unit_pending_inactive(UNIT(s))) {
1381                 log_debug("Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id);
1382
1383                 if (cfd >= 0)
1384                         close_nointr_nofail(cfd);
1385                 else  {
1386                         /* Flush all sockets by closing and reopening them */
1387                         socket_close_fds(s);
1388
1389                         r = socket_watch_fds(s);
1390                         if (r < 0) {
1391                                 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1392                                 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1393                         }
1394                 }
1395
1396                 return;
1397         }
1398
1399         if (cfd < 0) {
1400                 Iterator i;
1401                 Unit *u;
1402                 bool pending = false;
1403
1404                 /* If there's already a start pending don't bother to
1405                  * do anything */
1406                 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
1407                         if (unit_pending_active(u)) {
1408                                 pending = true;
1409                                 break;
1410                         }
1411
1412                 if (!pending) {
1413                         r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1414                         if (r < 0)
1415                                 goto fail;
1416                 }
1417
1418                 socket_set_state(s, SOCKET_RUNNING);
1419         } else {
1420                 char *prefix, *instance = NULL, *name;
1421                 Service *service;
1422
1423                 if (s->n_connections >= s->max_connections) {
1424                         log_warning("Too many incoming connections (%u)", s->n_connections);
1425                         close_nointr_nofail(cfd);
1426                         return;
1427                 }
1428
1429                 r = socket_instantiate_service(s);
1430                 if (r < 0)
1431                         goto fail;
1432
1433                 r = instance_from_socket(cfd, s->n_accepted, &instance);
1434                 if (r < 0) {
1435                         if (r != -ENOTCONN)
1436                                 goto fail;
1437
1438                         /* ENOTCONN is legitimate if TCP RST was received.
1439                          * This connection is over, but the socket unit lives on. */
1440                         close_nointr_nofail(cfd);
1441                         return;
1442                 }
1443
1444                 prefix = unit_name_to_prefix(UNIT(s)->id);
1445                 if (!prefix) {
1446                         free(instance);
1447                         r = -ENOMEM;
1448                         goto fail;
1449                 }
1450
1451                 name = unit_name_build(prefix, instance, ".service");
1452                 free(prefix);
1453                 free(instance);
1454
1455                 if (!name) {
1456                         r = -ENOMEM;
1457                         goto fail;
1458                 }
1459
1460                 r = unit_add_name(UNIT_DEREF(s->service), name);
1461                 if (r < 0) {
1462                         free(name);
1463                         goto fail;
1464                 }
1465
1466                 service = SERVICE(UNIT_DEREF(s->service));
1467                 unit_ref_unset(&s->service);
1468                 s->n_accepted ++;
1469
1470                 UNIT(service)->no_gc = false;
1471
1472                 unit_choose_id(UNIT(service), name);
1473                 free(name);
1474
1475                 r = service_set_socket_fd(service, cfd, s);
1476                 if (r < 0)
1477                         goto fail;
1478
1479                 cfd = -1;
1480                 s->n_connections ++;
1481
1482                 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1483                 if (r < 0)
1484                         goto fail;
1485
1486                 /* Notify clients about changed counters */
1487                 unit_add_to_dbus_queue(UNIT(s));
1488         }
1489
1490         return;
1491
1492 fail:
1493         log_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r));
1494         socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1495
1496         if (cfd >= 0)
1497                 close_nointr_nofail(cfd);
1498
1499         dbus_error_free(&error);
1500 }
1501
1502 static void socket_run_next(Socket *s) {
1503         int r;
1504
1505         assert(s);
1506         assert(s->control_command);
1507         assert(s->control_command->command_next);
1508
1509         socket_unwatch_control_pid(s);
1510
1511         s->control_command = s->control_command->command_next;
1512
1513         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1514                 goto fail;
1515
1516         return;
1517
1518 fail:
1519         log_warning("%s failed to run next task: %s", UNIT(s)->id, strerror(-r));
1520
1521         if (s->state == SOCKET_START_POST)
1522                 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1523         else if (s->state == SOCKET_STOP_POST)
1524                 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1525         else
1526                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1527 }
1528
1529 static int socket_start(Unit *u) {
1530         Socket *s = SOCKET(u);
1531
1532         assert(s);
1533
1534         /* We cannot fulfill this request right now, try again later
1535          * please! */
1536         if (s->state == SOCKET_STOP_PRE ||
1537             s->state == SOCKET_STOP_PRE_SIGKILL ||
1538             s->state == SOCKET_STOP_PRE_SIGTERM ||
1539             s->state == SOCKET_STOP_POST ||
1540             s->state == SOCKET_FINAL_SIGTERM ||
1541             s->state == SOCKET_FINAL_SIGKILL)
1542                 return -EAGAIN;
1543
1544         if (s->state == SOCKET_START_PRE ||
1545             s->state == SOCKET_START_POST)
1546                 return 0;
1547
1548         /* Cannot run this without the service being around */
1549         if (UNIT_DEREF(s->service)) {
1550                 Service *service;
1551
1552                 service = SERVICE(UNIT_DEREF(s->service));
1553
1554                 if (UNIT(service)->load_state != UNIT_LOADED) {
1555                         log_error("Socket service %s not loaded, refusing.", UNIT(service)->id);
1556                         return -ENOENT;
1557                 }
1558
1559                 /* If the service is already active we cannot start the
1560                  * socket */
1561                 if (service->state != SERVICE_DEAD &&
1562                     service->state != SERVICE_FAILED &&
1563                     service->state != SERVICE_AUTO_RESTART) {
1564                         log_error("Socket service %s already active, refusing.", UNIT(service)->id);
1565                         return -EBUSY;
1566                 }
1567
1568 #ifdef HAVE_SYSV_COMPAT
1569                 if (service->sysv_path) {
1570                         log_error("Using SysV services for socket activation is not supported. Refusing.");
1571                         return -ENOENT;
1572                 }
1573 #endif
1574         }
1575
1576         assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1577
1578         s->result = SOCKET_SUCCESS;
1579         socket_enter_start_pre(s);
1580         return 0;
1581 }
1582
1583 static int socket_stop(Unit *u) {
1584         Socket *s = SOCKET(u);
1585
1586         assert(s);
1587
1588         /* Already on it */
1589         if (s->state == SOCKET_STOP_PRE ||
1590             s->state == SOCKET_STOP_PRE_SIGTERM ||
1591             s->state == SOCKET_STOP_PRE_SIGKILL ||
1592             s->state == SOCKET_STOP_POST ||
1593             s->state == SOCKET_FINAL_SIGTERM ||
1594             s->state == SOCKET_FINAL_SIGKILL)
1595                 return 0;
1596
1597         /* If there's already something running we go directly into
1598          * kill mode. */
1599         if (s->state == SOCKET_START_PRE ||
1600             s->state == SOCKET_START_POST) {
1601                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
1602                 return -EAGAIN;
1603         }
1604
1605         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1606
1607         socket_enter_stop_pre(s, SOCKET_SUCCESS);
1608         return 0;
1609 }
1610
1611 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1612         Socket *s = SOCKET(u);
1613         SocketPort *p;
1614         int r;
1615
1616         assert(u);
1617         assert(f);
1618         assert(fds);
1619
1620         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1621         unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
1622         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1623
1624         if (s->control_pid > 0)
1625                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1626
1627         if (s->control_command_id >= 0)
1628                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1629
1630         LIST_FOREACH(port, p, s->ports) {
1631                 int copy;
1632
1633                 if (p->fd < 0)
1634                         continue;
1635
1636                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1637                         return copy;
1638
1639                 if (p->type == SOCKET_SOCKET) {
1640                         char *t;
1641
1642                         if ((r = socket_address_print(&p->address, &t)) < 0)
1643                                 return r;
1644
1645                         if (socket_address_family(&p->address) == AF_NETLINK)
1646                                 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1647                         else
1648                                 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1649                         free(t);
1650                 } else if (p->type == SOCKET_SPECIAL)
1651                         unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1652                 else {
1653                         assert(p->type == SOCKET_FIFO);
1654                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1655                 }
1656         }
1657
1658         return 0;
1659 }
1660
1661 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1662         Socket *s = SOCKET(u);
1663
1664         assert(u);
1665         assert(key);
1666         assert(value);
1667         assert(fds);
1668
1669         if (streq(key, "state")) {
1670                 SocketState state;
1671
1672                 if ((state = socket_state_from_string(value)) < 0)
1673                         log_debug("Failed to parse state value %s", value);
1674                 else
1675                         s->deserialized_state = state;
1676         } else if (streq(key, "result")) {
1677                 SocketResult f;
1678
1679                 f = socket_result_from_string(value);
1680                 if (f < 0)
1681                         log_debug("Failed to parse result value %s", value);
1682                 else if (f != SOCKET_SUCCESS)
1683                         s->result = f;
1684
1685         } else if (streq(key, "n-accepted")) {
1686                 unsigned k;
1687
1688                 if (safe_atou(value, &k) < 0)
1689                         log_debug("Failed to parse n-accepted value %s", value);
1690                 else
1691                         s->n_accepted += k;
1692         } else if (streq(key, "control-pid")) {
1693                 pid_t pid;
1694
1695                 if (parse_pid(value, &pid) < 0)
1696                         log_debug("Failed to parse control-pid value %s", value);
1697                 else
1698                         s->control_pid = pid;
1699         } else if (streq(key, "control-command")) {
1700                 SocketExecCommand id;
1701
1702                 if ((id = socket_exec_command_from_string(value)) < 0)
1703                         log_debug("Failed to parse exec-command value %s", value);
1704                 else {
1705                         s->control_command_id = id;
1706                         s->control_command = s->exec_command[id];
1707                 }
1708         } else if (streq(key, "fifo")) {
1709                 int fd, skip = 0;
1710                 SocketPort *p;
1711
1712                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1713                         log_debug("Failed to parse fifo value %s", value);
1714                 else {
1715
1716                         LIST_FOREACH(port, p, s->ports)
1717                                 if (p->type == SOCKET_FIFO &&
1718                                     streq_ptr(p->path, value+skip))
1719                                         break;
1720
1721                         if (p) {
1722                                 if (p->fd >= 0)
1723                                         close_nointr_nofail(p->fd);
1724                                 p->fd = fdset_remove(fds, fd);
1725                         }
1726                 }
1727
1728         } else if (streq(key, "special")) {
1729                 int fd, skip = 0;
1730                 SocketPort *p;
1731
1732                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1733                         log_debug("Failed to parse special value %s", value);
1734                 else {
1735
1736                         LIST_FOREACH(port, p, s->ports)
1737                                 if (p->type == SOCKET_SPECIAL &&
1738                                     streq_ptr(p->path, value+skip))
1739                                         break;
1740
1741                         if (p) {
1742                                 if (p->fd >= 0)
1743                                         close_nointr_nofail(p->fd);
1744                                 p->fd = fdset_remove(fds, fd);
1745                         }
1746                 }
1747
1748         } else if (streq(key, "socket")) {
1749                 int fd, type, skip = 0;
1750                 SocketPort *p;
1751
1752                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1753                         log_debug("Failed to parse socket value %s", value);
1754                 else {
1755
1756                         LIST_FOREACH(port, p, s->ports)
1757                                 if (socket_address_is(&p->address, value+skip, type))
1758                                         break;
1759
1760                         if (p) {
1761                                 if (p->fd >= 0)
1762                                         close_nointr_nofail(p->fd);
1763                                 p->fd = fdset_remove(fds, fd);
1764                         }
1765                 }
1766
1767         } else if (streq(key, "netlink")) {
1768                 int fd, skip = 0;
1769                 SocketPort *p;
1770
1771                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1772                         log_debug("Failed to parse socket value %s", value);
1773                 else {
1774
1775                         LIST_FOREACH(port, p, s->ports)
1776                                 if (socket_address_is_netlink(&p->address, value+skip))
1777                                         break;
1778
1779                         if (p) {
1780                                 if (p->fd >= 0)
1781                                         close_nointr_nofail(p->fd);
1782                                 p->fd = fdset_remove(fds, fd);
1783                         }
1784                 }
1785
1786         } else
1787                 log_debug("Unknown serialization key '%s'", key);
1788
1789         return 0;
1790 }
1791
1792 static UnitActiveState socket_active_state(Unit *u) {
1793         assert(u);
1794
1795         return state_translation_table[SOCKET(u)->state];
1796 }
1797
1798 static const char *socket_sub_state_to_string(Unit *u) {
1799         assert(u);
1800
1801         return socket_state_to_string(SOCKET(u)->state);
1802 }
1803
1804 static bool socket_check_gc(Unit *u) {
1805         Socket *s = SOCKET(u);
1806
1807         assert(u);
1808
1809         return s->n_connections > 0;
1810 }
1811
1812 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1813         Socket *s = SOCKET(u);
1814         int cfd = -1;
1815
1816         assert(s);
1817         assert(fd >= 0);
1818
1819         if (s->state != SOCKET_LISTENING)
1820                 return;
1821
1822         log_debug("Incoming traffic on %s", u->id);
1823
1824         if (events != EPOLLIN) {
1825
1826                 if (events & EPOLLHUP)
1827                         log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->id);
1828                 else
1829                         log_error("%s: Got unexpected poll event (0x%x) on socket.", u->id, events);
1830
1831                 goto fail;
1832         }
1833
1834         if (w->socket_accept) {
1835                 for (;;) {
1836
1837                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1838
1839                                 if (errno == EINTR)
1840                                         continue;
1841
1842                                 log_error("Failed to accept socket: %m");
1843                                 goto fail;
1844                         }
1845
1846                         break;
1847                 }
1848
1849                 socket_apply_socket_options(s, cfd);
1850         }
1851
1852         socket_enter_running(s, cfd);
1853         return;
1854
1855 fail:
1856         socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1857 }
1858
1859 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1860         Socket *s = SOCKET(u);
1861         SocketResult f;
1862
1863         assert(s);
1864         assert(pid >= 0);
1865
1866         if (pid != s->control_pid)
1867                 return;
1868
1869         s->control_pid = 0;
1870
1871         if (is_clean_exit(code, status))
1872                 f = SOCKET_SUCCESS;
1873         else if (code == CLD_EXITED)
1874                 f = SOCKET_FAILURE_EXIT_CODE;
1875         else if (code == CLD_KILLED)
1876                 f = SOCKET_FAILURE_SIGNAL;
1877         else if (code == CLD_DUMPED)
1878                 f = SOCKET_FAILURE_CORE_DUMP;
1879         else
1880                 assert_not_reached("Unknown code");
1881
1882         if (s->control_command) {
1883                 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1884
1885                 if (s->control_command->ignore)
1886                         f = SOCKET_SUCCESS;
1887         }
1888
1889         log_full(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
1890                  "%s control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
1891
1892         if (f != SOCKET_SUCCESS)
1893                 s->result = f;
1894
1895         if (s->control_command &&
1896             s->control_command->command_next &&
1897             f == SOCKET_SUCCESS) {
1898
1899                 log_debug("%s running next command for state %s", u->id, socket_state_to_string(s->state));
1900                 socket_run_next(s);
1901         } else {
1902                 s->control_command = NULL;
1903                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1904
1905                 /* No further commands for this step, so let's figure
1906                  * out what to do next */
1907
1908                 log_debug("%s got final SIGCHLD for state %s", u->id, socket_state_to_string(s->state));
1909
1910                 switch (s->state) {
1911
1912                 case SOCKET_START_PRE:
1913                         if (f == SOCKET_SUCCESS)
1914                                 socket_enter_start_post(s);
1915                         else
1916                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
1917                         break;
1918
1919                 case SOCKET_START_POST:
1920                         if (f == SOCKET_SUCCESS)
1921                                 socket_enter_listening(s);
1922                         else
1923                                 socket_enter_stop_pre(s, f);
1924                         break;
1925
1926                 case SOCKET_STOP_PRE:
1927                 case SOCKET_STOP_PRE_SIGTERM:
1928                 case SOCKET_STOP_PRE_SIGKILL:
1929                         socket_enter_stop_post(s, f);
1930                         break;
1931
1932                 case SOCKET_STOP_POST:
1933                 case SOCKET_FINAL_SIGTERM:
1934                 case SOCKET_FINAL_SIGKILL:
1935                         socket_enter_dead(s, f);
1936                         break;
1937
1938                 default:
1939                         assert_not_reached("Uh, control process died at wrong time.");
1940                 }
1941         }
1942
1943         /* Notify clients about changed exit status */
1944         unit_add_to_dbus_queue(u);
1945 }
1946
1947 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1948         Socket *s = SOCKET(u);
1949
1950         assert(s);
1951         assert(elapsed == 1);
1952         assert(w == &s->timer_watch);
1953
1954         switch (s->state) {
1955
1956         case SOCKET_START_PRE:
1957                 log_warning("%s starting timed out. Terminating.", u->id);
1958                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1959                 break;
1960
1961         case SOCKET_START_POST:
1962                 log_warning("%s starting timed out. Stopping.", u->id);
1963                 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
1964                 break;
1965
1966         case SOCKET_STOP_PRE:
1967                 log_warning("%s stopping timed out. Terminating.", u->id);
1968                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1969                 break;
1970
1971         case SOCKET_STOP_PRE_SIGTERM:
1972                 if (s->exec_context.send_sigkill) {
1973                         log_warning("%s stopping timed out. Killing.", u->id);
1974                         socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1975                 } else {
1976                         log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->id);
1977                         socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1978                 }
1979                 break;
1980
1981         case SOCKET_STOP_PRE_SIGKILL:
1982                 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
1983                 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1984                 break;
1985
1986         case SOCKET_STOP_POST:
1987                 log_warning("%s stopping timed out (2). Terminating.", u->id);
1988                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1989                 break;
1990
1991         case SOCKET_FINAL_SIGTERM:
1992                 if (s->exec_context.send_sigkill) {
1993                         log_warning("%s stopping timed out (2). Killing.", u->id);
1994                         socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1995                 } else {
1996                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->id);
1997                         socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
1998                 }
1999                 break;
2000
2001         case SOCKET_FINAL_SIGKILL:
2002                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
2003                 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2004                 break;
2005
2006         default:
2007                 assert_not_reached("Timeout at wrong time.");
2008         }
2009 }
2010
2011 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2012         int *rfds;
2013         unsigned rn_fds, k;
2014         SocketPort *p;
2015
2016         assert(s);
2017         assert(fds);
2018         assert(n_fds);
2019
2020         /* Called from the service code for requesting our fds */
2021
2022         rn_fds = 0;
2023         LIST_FOREACH(port, p, s->ports)
2024                 if (p->fd >= 0)
2025                         rn_fds++;
2026
2027         if (rn_fds <= 0) {
2028                 *fds = NULL;
2029                 *n_fds = 0;
2030                 return 0;
2031         }
2032
2033         if (!(rfds = new(int, rn_fds)))
2034                 return -ENOMEM;
2035
2036         k = 0;
2037         LIST_FOREACH(port, p, s->ports)
2038                 if (p->fd >= 0)
2039                         rfds[k++] = p->fd;
2040
2041         assert(k == rn_fds);
2042
2043         *fds = rfds;
2044         *n_fds = rn_fds;
2045
2046         return 0;
2047 }
2048
2049 void socket_notify_service_dead(Socket *s, bool failed_permanent) {
2050         assert(s);
2051
2052         /* The service is dead. Dang!
2053          *
2054          * This is strictly for one-instance-for-all-connections
2055          * services. */
2056
2057         if (s->state == SOCKET_RUNNING) {
2058                 log_debug("%s got notified about service death (failed permanently: %s)", UNIT(s)->id, yes_no(failed_permanent));
2059                 if (failed_permanent)
2060                         socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT);
2061                 else
2062                         socket_enter_listening(s);
2063         }
2064 }
2065
2066 void socket_connection_unref(Socket *s) {
2067         assert(s);
2068
2069         /* The service is dead. Yay!
2070          *
2071          * This is strictly for one-instance-per-connection
2072          * services. */
2073
2074         assert(s->n_connections > 0);
2075         s->n_connections--;
2076
2077         log_debug("%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
2078 }
2079
2080 static void socket_reset_failed(Unit *u) {
2081         Socket *s = SOCKET(u);
2082
2083         assert(s);
2084
2085         if (s->state == SOCKET_FAILED)
2086                 socket_set_state(s, SOCKET_DEAD);
2087
2088         s->result = SOCKET_SUCCESS;
2089 }
2090
2091 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2092         Socket *s = SOCKET(u);
2093         int r = 0;
2094         Set *pid_set = NULL;
2095
2096         assert(s);
2097
2098         if (who == KILL_MAIN) {
2099                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2100                 return -ESRCH;
2101         }
2102
2103         if (s->control_pid <= 0 && who == KILL_CONTROL) {
2104                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2105                 return -ESRCH;
2106         }
2107
2108         if (who == KILL_CONTROL || who == KILL_ALL)
2109                 if (s->control_pid > 0)
2110                         if (kill(s->control_pid, signo) < 0)
2111                                 r = -errno;
2112
2113         if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
2114                 int q;
2115
2116                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2117                         return -ENOMEM;
2118
2119                 /* Exclude the control pid from being killed via the cgroup */
2120                 if (s->control_pid > 0)
2121                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2122                                 r = q;
2123                                 goto finish;
2124                         }
2125
2126                 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
2127                         if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
2128                                 r = q;
2129         }
2130
2131 finish:
2132         if (pid_set)
2133                 set_free(pid_set);
2134
2135         return r;
2136 }
2137
2138 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2139         [SOCKET_DEAD] = "dead",
2140         [SOCKET_START_PRE] = "start-pre",
2141         [SOCKET_START_POST] = "start-post",
2142         [SOCKET_LISTENING] = "listening",
2143         [SOCKET_RUNNING] = "running",
2144         [SOCKET_STOP_PRE] = "stop-pre",
2145         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2146         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2147         [SOCKET_STOP_POST] = "stop-post",
2148         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2149         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2150         [SOCKET_FAILED] = "failed"
2151 };
2152
2153 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2154
2155 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2156         [SOCKET_EXEC_START_PRE] = "StartPre",
2157         [SOCKET_EXEC_START_POST] = "StartPost",
2158         [SOCKET_EXEC_STOP_PRE] = "StopPre",
2159         [SOCKET_EXEC_STOP_POST] = "StopPost"
2160 };
2161
2162 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2163
2164 static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2165         [SOCKET_SUCCESS] = "success",
2166         [SOCKET_FAILURE_RESOURCES] = "resources",
2167         [SOCKET_FAILURE_TIMEOUT] = "timeout",
2168         [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2169         [SOCKET_FAILURE_SIGNAL] = "signal",
2170         [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
2171         [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent"
2172 };
2173
2174 DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2175
2176 const UnitVTable socket_vtable = {
2177         .suffix = ".socket",
2178         .object_size = sizeof(Socket),
2179         .sections =
2180                 "Unit\0"
2181                 "Socket\0"
2182                 "Install\0",
2183
2184         .init = socket_init,
2185         .done = socket_done,
2186         .load = socket_load,
2187
2188         .kill = socket_kill,
2189
2190         .coldplug = socket_coldplug,
2191
2192         .dump = socket_dump,
2193
2194         .start = socket_start,
2195         .stop = socket_stop,
2196
2197         .serialize = socket_serialize,
2198         .deserialize_item = socket_deserialize_item,
2199
2200         .active_state = socket_active_state,
2201         .sub_state_to_string = socket_sub_state_to_string,
2202
2203         .check_gc = socket_check_gc,
2204
2205         .fd_event = socket_fd_event,
2206         .sigchld_event = socket_sigchld_event,
2207         .timer_event = socket_timer_event,
2208
2209         .reset_failed = socket_reset_failed,
2210
2211         .bus_interface = "org.freedesktop.systemd1.Socket",
2212         .bus_message_handler = bus_socket_message_handler,
2213         .bus_invalidating_properties =  bus_socket_invalidating_properties
2214 };