src/socket.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <sys/epoll.h>
  28 #include <signal.h>
  29 #include <arpa/inet.h>
  30
  31 #include "unit.h"
  32 #include "socket.h"
  33 #include "log.h"
  34 #include "load-dropin.h"
  35 #include "load-fragment.h"
  36 #include "strv.h"
  37 #include "unit-name.h"
  38 #include "dbus-socket.h"
  39 #include "missing.h"
  40 #include "special.h"
  41
  42 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  43         [SOCKET_DEAD] = UNIT_INACTIVE,
  44         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  45         [SOCKET_START_POST] = UNIT_ACTIVATING,
  46         [SOCKET_LISTENING] = UNIT_ACTIVE,
  47         [SOCKET_RUNNING] = UNIT_ACTIVE,
  48         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  49         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  50         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  51         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  52         [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  53         [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  54         [SOCKET_MAINTENANCE] = UNIT_MAINTENANCE
  55 };
  56
  57 static void socket_init(Unit *u) {
  58         Socket *s = SOCKET(u);
  59
  60         assert(u);
  61         assert(u->meta.load_state == UNIT_STUB);
  62
  63         s->backlog = SOMAXCONN;
  64         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  65         s->directory_mode = 0755;
  66         s->socket_mode = 0666;
  67
  68         s->max_connections = 64;
  69
  70         s->priority = -1;
  71         s->ip_tos = -1;
  72         s->ip_ttl = -1;
  73         s->mark = -1;
  74
  75         exec_context_init(&s->exec_context);
  76
  77         s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
  78 }
  79
  80 static void socket_unwatch_control_pid(Socket *s) {
  81         assert(s);
  82
  83         if (s->control_pid <= 0)
  84                 return;
  85
  86         unit_unwatch_pid(UNIT(s), s->control_pid);
  87         s->control_pid = 0;
  88 }
  89
  90 static void socket_done(Unit *u) {
  91         Socket *s = SOCKET(u);
  92         SocketPort *p;
  93         Meta *i;
  94
  95         assert(s);
  96
  97         while ((p = s->ports)) {
  98                 LIST_REMOVE(SocketPort, port, s->ports, p);
  99
 100                 if (p->fd >= 0) {
 101                         unit_unwatch_fd(UNIT(s), &p->fd_watch);
 102                         close_nointr_nofail(p->fd);
 103                 }
 104
 105                 free(p->path);
 106                 free(p);
 107         }
 108
 109         exec_context_done(&s->exec_context);
 110         exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
 111         s->control_command = NULL;
 112
 113         socket_unwatch_control_pid(s);
 114
 115         s->service = NULL;
 116
 117         free(s->bind_to_device);
 118         s->bind_to_device = NULL;
 119
 120         unit_unwatch_timer(u, &s->timer_watch);
 121
 122         /* Make sure no service instance refers to us anymore. */
 123         LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
 124                 Service *service = (Service *) i;
 125
 126                 if (service->socket == s)
 127                         service->socket = NULL;
 128         }
 129 }
 130
 131 static bool have_non_accept_socket(Socket *s) {
 132         SocketPort *p;
 133
 134         assert(s);
 135
 136         if (!s->accept)
 137                 return true;
 138
 139         LIST_FOREACH(port, p, s->ports) {
 140
 141                 if (p->type != SOCKET_SOCKET)
 142                         return true;
 143
 144                 if (!socket_address_can_accept(&p->address))
 145                         return true;
 146         }
 147
 148         return false;
 149 }
 150
 151 static int socket_verify(Socket *s) {
 152         assert(s);
 153
 154         if (s->meta.load_state != UNIT_LOADED)
 155                 return 0;
 156
 157         if (!s->ports) {
 158                 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
 159                 return -EINVAL;
 160         }
 161
 162         if (s->accept && s->max_connections <= 0) {
 163                 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
 164                 return -EINVAL;
 165         }
 166
 167         if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
 168                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 169                 return -EINVAL;
 170         }
 171
 172         return 0;
 173 }
 174
 175 static bool socket_needs_mount(Socket *s, const char *prefix) {
 176         SocketPort *p;
 177
 178         assert(s);
 179
 180         LIST_FOREACH(port, p, s->ports) {
 181
 182                 if (p->type == SOCKET_SOCKET) {
 183                         if (socket_address_needs_mount(&p->address, prefix))
 184                                 return true;
 185                 } else {
 186                         assert(p->type == SOCKET_FIFO);
 187                         if (path_startswith(p->path, prefix))
 188                                 return true;
 189                 }
 190         }
 191
 192         return false;
 193 }
 194
 195 int socket_add_one_mount_link(Socket *s, Mount *m) {
 196         int r;
 197
 198         assert(s);
 199         assert(m);
 200
 201         if (s->meta.load_state != UNIT_LOADED ||
 202             m->meta.load_state != UNIT_LOADED)
 203                 return 0;
 204
 205         if (!socket_needs_mount(s, m->where))
 206                 return 0;
 207
 208         if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
 209                 return r;
 210
 211         return 0;
 212 }
 213
 214 static int socket_add_mount_links(Socket *s) {
 215         Meta *other;
 216         int r;
 217
 218         assert(s);
 219
 220         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
 221                 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
 222                         return r;
 223
 224         return 0;
 225 }
 226
 227 static int socket_add_device_link(Socket *s) {
 228         char *t;
 229         int r;
 230
 231         assert(s);
 232
 233         if (!s->bind_to_device)
 234                 return 0;
 235
 236         if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
 237                 return -ENOMEM;
 238
 239         r = unit_add_node_link(UNIT(s), t, false);
 240         free(t);
 241
 242         return r;
 243 }
 244
 245 static int socket_add_default_dependencies(Socket *s) {
 246         int r;
 247         assert(s);
 248
 249         if (s->meta.manager->running_as == MANAGER_SYSTEM)
 250                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
 251                         return r;
 252
 253         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 254 }
 255
 256 static int socket_load(Unit *u) {
 257         Socket *s = SOCKET(u);
 258         int r;
 259
 260         assert(u);
 261         assert(u->meta.load_state == UNIT_STUB);
 262
 263         if ((r = unit_load_fragment_and_dropin(u)) < 0)
 264                 return r;
 265
 266         /* This is a new unit? Then let's add in some extras */
 267         if (u->meta.load_state == UNIT_LOADED) {
 268
 269                 if (have_non_accept_socket(s)) {
 270                         if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
 271                                 return r;
 272
 273                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
 274                                 return r;
 275                 }
 276
 277                 if ((r = socket_add_mount_links(s)) < 0)
 278                         return r;
 279
 280                 if ((r = socket_add_device_link(s)) < 0)
 281                         return r;
 282
 283                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 284                         return r;
 285
 286                 if ((r = unit_add_default_cgroup(u)) < 0)
 287                         return r;
 288
 289                 if (s->meta.default_dependencies)
 290                         if ((r = socket_add_default_dependencies(s)) < 0)
 291                                 return r;
 292         }
 293
 294         return socket_verify(s);
 295 }
 296
 297 static const char* listen_lookup(int type) {
 298
 299         if (type == SOCK_STREAM)
 300                 return "ListenStream";
 301         else if (type == SOCK_DGRAM)
 302                 return "ListenDatagram";
 303         else if (type == SOCK_SEQPACKET)
 304                 return "ListenSequentialPacket";
 305
 306         assert_not_reached("Unknown socket type");
 307         return NULL;
 308 }
 309
 310 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 311
 312         SocketExecCommand c;
 313         Socket *s = SOCKET(u);
 314         SocketPort *p;
 315         const char *prefix2;
 316         char *p2;
 317
 318         assert(s);
 319         assert(f);
 320
 321         p2 = strappend(prefix, "\t");
 322         prefix2 = p2 ? p2 : prefix;
 323
 324         fprintf(f,
 325                 "%sSocket State: %s\n"
 326                 "%sBindIPv6Only: %s\n"
 327                 "%sBacklog: %u\n"
 328                 "%sKillMode: %s\n"
 329                 "%sSocketMode: %04o\n"
 330                 "%sDirectoryMode: %04o\n"
 331                 "%sKeepAlive: %s\n"
 332                 "%sFreeBind: %s\n",
 333                 prefix, socket_state_to_string(s->state),
 334                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
 335                 prefix, s->backlog,
 336                 prefix, kill_mode_to_string(s->kill_mode),
 337                 prefix, s->socket_mode,
 338                 prefix, s->directory_mode,
 339                 prefix, yes_no(s->keep_alive),
 340                 prefix, yes_no(s->free_bind));
 341
 342         if (s->control_pid > 0)
 343                 fprintf(f,
 344                         "%sControl PID: %lu\n",
 345                         prefix, (unsigned long) s->control_pid);
 346
 347         if (s->bind_to_device)
 348                 fprintf(f,
 349                         "%sBindToDevice: %s\n",
 350                         prefix, s->bind_to_device);
 351
 352         if (s->accept)
 353                 fprintf(f,
 354                         "%sAccepted: %u\n"
 355                         "%sNConnections: %u\n"
 356                         "%sMaxConnections: %u\n",
 357                         prefix, s->n_accepted,
 358                         prefix, s->n_connections,
 359                         prefix, s->max_connections);
 360
 361         if (s->priority >= 0)
 362                 fprintf(f,
 363                         "%sPriority: %i\n",
 364                         prefix, s->priority);
 365
 366         if (s->receive_buffer > 0)
 367                 fprintf(f,
 368                         "%sReceiveBuffer: %zu\n",
 369                         prefix, s->receive_buffer);
 370
 371         if (s->send_buffer > 0)
 372                 fprintf(f,
 373                         "%sSendBuffer: %zu\n",
 374                         prefix, s->send_buffer);
 375
 376         if (s->ip_tos >= 0)
 377                 fprintf(f,
 378                         "%sIPTOS: %i\n",
 379                         prefix, s->ip_tos);
 380
 381         if (s->ip_ttl >= 0)
 382                 fprintf(f,
 383                         "%sIPTTL: %i\n",
 384                         prefix, s->ip_ttl);
 385
 386         if (s->pipe_size > 0)
 387                 fprintf(f,
 388                         "%sPipeSize: %zu\n",
 389                         prefix, s->pipe_size);
 390
 391         if (s->mark >= 0)
 392                 fprintf(f,
 393                         "%sMark: %i\n",
 394                         prefix, s->mark);
 395
 396         LIST_FOREACH(port, p, s->ports) {
 397
 398                 if (p->type == SOCKET_SOCKET) {
 399                         const char *t;
 400                         int r;
 401                         char *k;
 402
 403                         if ((r = socket_address_print(&p->address, &k)) < 0)
 404                                 t = strerror(-r);
 405                         else
 406                                 t = k;
 407
 408                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 409                         free(k);
 410                 } else
 411                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 412         }
 413
 414         exec_context_dump(&s->exec_context, f, prefix);
 415
 416         for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
 417                 if (!s->exec_command[c])
 418                         continue;
 419
 420                 fprintf(f, "%s-> %s:\n",
 421                         prefix, socket_exec_command_to_string(c));
 422
 423                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 424         }
 425
 426         free(p2);
 427 }
 428
 429 static int instance_from_socket(int fd, unsigned nr, char **instance) {
 430         socklen_t l;
 431         char *r;
 432         union {
 433                 struct sockaddr sa;
 434                 struct sockaddr_un un;
 435                 struct sockaddr_in in;
 436                 struct sockaddr_in6 in6;
 437                 struct sockaddr_storage storage;
 438         } local, remote;
 439
 440         assert(fd >= 0);
 441         assert(instance);
 442
 443         l = sizeof(local);
 444         if (getsockname(fd, &local.sa, &l) < 0)
 445                 return -errno;
 446
 447         l = sizeof(remote);
 448         if (getpeername(fd, &remote.sa, &l) < 0)
 449                 return -errno;
 450
 451         switch (local.sa.sa_family) {
 452
 453         case AF_INET: {
 454                 uint32_t
 455                         a = ntohl(local.in.sin_addr.s_addr),
 456                         b = ntohl(remote.in.sin_addr.s_addr);
 457
 458                 if (asprintf(&r,
 459                              "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 460                              nr,
 461                              a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
 462                              ntohs(local.in.sin_port),
 463                              b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
 464                              ntohs(remote.in.sin_port)) < 0)
 465                         return -ENOMEM;
 466
 467                 break;
 468         }
 469
 470         case AF_INET6: {
 471                 static const char ipv4_prefix[] = {
 472                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
 473                 };
 474
 475                 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
 476                     memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
 477                         const uint8_t
 478                                 *a = local.in6.sin6_addr.s6_addr+12,
 479                                 *b = remote.in6.sin6_addr.s6_addr+12;
 480
 481                         if (asprintf(&r,
 482                                      "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
 483                                      nr,
 484                                      a[0], a[1], a[2], a[3],
 485                                      ntohs(local.in6.sin6_port),
 486                                      b[0], b[1], b[2], b[3],
 487                                      ntohs(remote.in6.sin6_port)) < 0)
 488                                 return -ENOMEM;
 489                 } else {
 490                         char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
 491
 492                         if (asprintf(&r,
 493                                      "%u-%s:%u-%s:%u",
 494                                      nr,
 495                                      inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
 496                                      ntohs(local.in6.sin6_port),
 497                                      inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
 498                                      ntohs(remote.in6.sin6_port)) < 0)
 499                                 return -ENOMEM;
 500                 }
 501
 502                 break;
 503         }
 504
 505         case AF_UNIX: {
 506                 struct ucred ucred;
 507
 508                 l = sizeof(ucred);
 509                 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 510                         return -errno;
 511
 512                 if (asprintf(&r,
 513                              "%u-%lu-%lu",
 514                              nr,
 515                              (unsigned long) ucred.pid,
 516                              (unsigned long) ucred.uid) < 0)
 517                         return -ENOMEM;
 518
 519                 break;
 520         }
 521
 522         default:
 523                 assert_not_reached("Unhandled socket type.");
 524         }
 525
 526         *instance = r;
 527         return 0;
 528 }
 529
 530 static void socket_close_fds(Socket *s) {
 531         SocketPort *p;
 532
 533         assert(s);
 534
 535         LIST_FOREACH(port, p, s->ports) {
 536                 if (p->fd < 0)
 537                         continue;
 538
 539                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 540                 close_nointr_nofail(p->fd);
 541
 542                 /* One little note: we should never delete any sockets
 543                  * in the file system here! After all some other
 544                  * process we spawned might still have a reference of
 545                  * this fd and wants to continue to use it. Therefore
 546                  * we delete sockets in the file system before we
 547                  * create a new one, not after we stopped using
 548                  * one! */
 549
 550                 p->fd = -1;
 551         }
 552 }
 553
 554 static void socket_apply_socket_options(Socket *s, int fd) {
 555         assert(s);
 556         assert(fd >= 0);
 557
 558         if (s->keep_alive) {
 559                 int b = s->keep_alive;
 560                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
 561                         log_warning("SO_KEEPALIVE failed: %m");
 562         }
 563
 564         if (s->priority >= 0)
 565                 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
 566                         log_warning("SO_PRIORITY failed: %m");
 567
 568         if (s->receive_buffer > 0) {
 569                 int value = (int) s->receive_buffer;
 570                 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
 571                         log_warning("SO_RCVBUF failed: %m");
 572         }
 573
 574         if (s->send_buffer > 0) {
 575                 int value = (int) s->send_buffer;
 576                 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
 577                         log_warning("SO_SNDBUF failed: %m");
 578         }
 579
 580         if (s->mark >= 0)
 581                 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
 582                         log_warning("SO_MARK failed: %m");
 583
 584         if (s->ip_tos >= 0)
 585                 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
 586                         log_warning("IP_TOS failed: %m");
 587
 588         if (s->ip_ttl >= 0) {
 589                 int r, x;
 590
 591                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
 592                 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
 593
 594                 if (r < 0 && x < 0)
 595                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
 596         }
 597 }
 598
 599 static void socket_apply_pipe_options(Socket *s, int fd) {
 600         assert(s);
 601         assert(fd >= 0);
 602
 603         if (s->pipe_size > 0)
 604                 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
 605                         log_warning("F_SETPIPE_SZ: %m");
 606 }
 607
 608 static int socket_open_fds(Socket *s) {
 609         SocketPort *p;
 610         int r;
 611
 612         assert(s);
 613
 614         LIST_FOREACH(port, p, s->ports) {
 615
 616                 if (p->fd >= 0)
 617                         continue;
 618
 619                 if (p->type == SOCKET_SOCKET) {
 620
 621                         if ((r = socket_address_listen(
 622                                              &p->address,
 623                                              s->backlog,
 624                                              s->bind_ipv6_only,
 625                                              s->bind_to_device,
 626                                              s->free_bind,
 627                                              s->directory_mode,
 628                                              s->socket_mode,
 629                                              &p->fd)) < 0)
 630                                 goto rollback;
 631
 632                         socket_apply_socket_options(s, p->fd);
 633
 634                 } else {
 635                         struct stat st;
 636                         assert(p->type == SOCKET_FIFO);
 637
 638                         mkdir_parents(p->path, s->directory_mode);
 639
 640                         if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
 641                                 r = -errno;
 642                                 goto rollback;
 643                         }
 644
 645                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 646                                 r = -errno;
 647                                 goto rollback;
 648                         }
 649
 650                         if (fstat(p->fd, &st) < 0) {
 651                                 r = -errno;
 652                                 goto rollback;
 653                         }
 654
 655                         /* FIXME verify user, access mode */
 656
 657                         if (!S_ISFIFO(st.st_mode)) {
 658                                 r = -EEXIST;
 659                                 goto rollback;
 660                         }
 661
 662                         socket_apply_pipe_options(s, p->fd);
 663                 }
 664         }
 665
 666         return 0;
 667
 668 rollback:
 669         socket_close_fds(s);
 670         return r;
 671 }
 672
 673 static void socket_unwatch_fds(Socket *s) {
 674         SocketPort *p;
 675
 676         assert(s);
 677
 678         LIST_FOREACH(port, p, s->ports) {
 679                 if (p->fd < 0)
 680                         continue;
 681
 682                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 683         }
 684 }
 685
 686 static int socket_watch_fds(Socket *s) {
 687         SocketPort *p;
 688         int r;
 689
 690         assert(s);
 691
 692         LIST_FOREACH(port, p, s->ports) {
 693                 if (p->fd < 0)
 694                         continue;
 695
 696                 p->fd_watch.socket_accept =
 697                         s->accept &&
 698                         p->type == SOCKET_SOCKET &&
 699                         socket_address_can_accept(&p->address);
 700
 701                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 702                         goto fail;
 703         }
 704
 705         return 0;
 706
 707 fail:
 708         socket_unwatch_fds(s);
 709         return r;
 710 }
 711
 712 static void socket_set_state(Socket *s, SocketState state) {
 713         SocketState old_state;
 714         assert(s);
 715
 716         old_state = s->state;
 717         s->state = state;
 718
 719         if (state != SOCKET_START_PRE &&
 720             state != SOCKET_START_POST &&
 721             state != SOCKET_STOP_PRE &&
 722             state != SOCKET_STOP_PRE_SIGTERM &&
 723             state != SOCKET_STOP_PRE_SIGKILL &&
 724             state != SOCKET_STOP_POST &&
 725             state != SOCKET_FINAL_SIGTERM &&
 726             state != SOCKET_FINAL_SIGKILL) {
 727                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 728                 socket_unwatch_control_pid(s);
 729                 s->control_command = NULL;
 730                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
 731         }
 732
 733         if (state != SOCKET_LISTENING)
 734                 socket_unwatch_fds(s);
 735
 736         if (state != SOCKET_START_POST &&
 737             state != SOCKET_LISTENING &&
 738             state != SOCKET_RUNNING &&
 739             state != SOCKET_STOP_PRE &&
 740             state != SOCKET_STOP_PRE_SIGTERM &&
 741             state != SOCKET_STOP_PRE_SIGKILL)
 742                 socket_close_fds(s);
 743
 744         if (state != old_state)
 745                 log_debug("%s changed %s -> %s",
 746                           s->meta.id,
 747                           socket_state_to_string(old_state),
 748                           socket_state_to_string(state));
 749
 750         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 751 }
 752
 753 static int socket_coldplug(Unit *u) {
 754         Socket *s = SOCKET(u);
 755         int r;
 756
 757         assert(s);
 758         assert(s->state == SOCKET_DEAD);
 759
 760         if (s->deserialized_state != s->state) {
 761
 762                 if (s->deserialized_state == SOCKET_START_PRE ||
 763                     s->deserialized_state == SOCKET_START_POST ||
 764                     s->deserialized_state == SOCKET_STOP_PRE ||
 765                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 766                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
 767                     s->deserialized_state == SOCKET_STOP_POST ||
 768                     s->deserialized_state == SOCKET_FINAL_SIGTERM ||
 769                     s->deserialized_state == SOCKET_FINAL_SIGKILL) {
 770
 771                         if (s->control_pid <= 0)
 772                                 return -EBADMSG;
 773
 774                         if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
 775                                 return r;
 776
 777                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 778                                 return r;
 779                 }
 780
 781                 if (s->deserialized_state == SOCKET_START_POST ||
 782                     s->deserialized_state == SOCKET_LISTENING ||
 783                     s->deserialized_state == SOCKET_RUNNING ||
 784                     s->deserialized_state == SOCKET_STOP_PRE ||
 785                     s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
 786                     s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
 787                         if ((r = socket_open_fds(s)) < 0)
 788                                 return r;
 789
 790                 if (s->deserialized_state == SOCKET_LISTENING)
 791                         if ((r = socket_watch_fds(s)) < 0)
 792                                 return r;
 793
 794                 socket_set_state(s, s->deserialized_state);
 795         }
 796
 797         return 0;
 798 }
 799
 800 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
 801         pid_t pid;
 802         int r;
 803         char **argv;
 804
 805         assert(s);
 806         assert(c);
 807         assert(_pid);
 808
 809         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 810                 goto fail;
 811
 812         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
 813                 r = -ENOMEM;
 814                 goto fail;
 815         }
 816
 817         r = exec_spawn(c,
 818                        argv,
 819                        &s->exec_context,
 820                        NULL, 0,
 821                        s->meta.manager->environment,
 822                        true,
 823                        true,
 824                        s->meta.manager->confirm_spawn,
 825                        s->meta.cgroup_bondings,
 826                        &pid);
 827
 828         strv_free(argv);
 829         if (r < 0)
 830                 goto fail;
 831
 832         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 833                 /* FIXME: we need to do something here */
 834                 goto fail;
 835
 836         *_pid = pid;
 837
 838         return 0;
 839
 840 fail:
 841         unit_unwatch_timer(UNIT(s), &s->timer_watch);
 842
 843         return r;
 844 }
 845
 846 static void socket_enter_dead(Socket *s, bool success) {
 847         assert(s);
 848
 849         if (!success)
 850                 s->failure = true;
 851
 852         socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
 853 }
 854
 855 static void socket_enter_signal(Socket *s, SocketState state, bool success);
 856
 857 static void socket_enter_stop_post(Socket *s, bool success) {
 858         int r;
 859         assert(s);
 860
 861         if (!success)
 862                 s->failure = true;
 863
 864         socket_unwatch_control_pid(s);
 865
 866         s->control_command_id = SOCKET_EXEC_STOP_POST;
 867
 868         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
 869                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 870                         goto fail;
 871
 872                 socket_set_state(s, SOCKET_STOP_POST);
 873         } else
 874                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
 875
 876         return;
 877
 878 fail:
 879         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
 880         socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
 881 }
 882
 883 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 884         int r;
 885         bool sent = false;
 886
 887         assert(s);
 888
 889         if (!success)
 890                 s->failure = true;
 891
 892         if (s->kill_mode != KILL_NONE) {
 893                 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
 894
 895                 if (s->kill_mode == KILL_CONTROL_GROUP) {
 896
 897                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
 898                                 if (r != -EAGAIN && r != -ESRCH)
 899                                         goto fail;
 900                         } else
 901                                 sent = true;
 902                 }
 903
 904                 if (!sent && s->control_pid > 0)
 905                         if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
 906                                 r = -errno;
 907                                 goto fail;
 908                         }
 909         }
 910
 911         if (sent && s->control_pid > 0) {
 912                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 913                         goto fail;
 914
 915                 socket_set_state(s, state);
 916         } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 917                 socket_enter_stop_post(s, true);
 918         else
 919                 socket_enter_dead(s, true);
 920
 921         return;
 922
 923 fail:
 924         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
 925
 926         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 927                 socket_enter_stop_post(s, false);
 928         else
 929                 socket_enter_dead(s, false);
 930 }
 931
 932 static void socket_enter_stop_pre(Socket *s, bool success) {
 933         int r;
 934         assert(s);
 935
 936         if (!success)
 937                 s->failure = true;
 938
 939         socket_unwatch_control_pid(s);
 940
 941         s->control_command_id = SOCKET_EXEC_STOP_PRE;
 942
 943         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
 944                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
 945                         goto fail;
 946
 947                 socket_set_state(s, SOCKET_STOP_PRE);
 948         } else
 949                 socket_enter_stop_post(s, true);
 950
 951         return;
 952
 953 fail:
 954         log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
 955         socket_enter_stop_post(s, false);
 956 }
 957
 958 static void socket_enter_listening(Socket *s) {
 959         int r;
 960         assert(s);
 961
 962         if ((r = socket_watch_fds(s)) < 0) {
 963                 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
 964                 goto fail;
 965         }
 966
 967         socket_set_state(s, SOCKET_LISTENING);
 968         return;
 969
 970 fail:
 971         socket_enter_stop_pre(s, false);
 972 }
 973
 974 static void socket_enter_start_post(Socket *s) {
 975         int r;
 976         assert(s);
 977
 978         if ((r = socket_open_fds(s)) < 0) {
 979                 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
 980                 goto fail;
 981         }
 982
 983         socket_unwatch_control_pid(s);
 984
 985         s->control_command_id = SOCKET_EXEC_START_POST;
 986
 987         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
 988                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
 989                         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
 990                         goto fail;
 991                 }
 992
 993                 socket_set_state(s, SOCKET_START_POST);
 994         } else
 995                 socket_enter_listening(s);
 996
 997         return;
 998
 999 fail:
1000         socket_enter_stop_pre(s, false);
1001 }
1002
1003 static void socket_enter_start_pre(Socket *s) {
1004         int r;
1005         assert(s);
1006
1007         socket_unwatch_control_pid(s);
1008
1009         s->control_command_id = SOCKET_EXEC_START_PRE;
1010
1011         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1012                 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1013                         goto fail;
1014
1015                 socket_set_state(s, SOCKET_START_PRE);
1016         } else
1017                 socket_enter_start_post(s);
1018
1019         return;
1020
1021 fail:
1022         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1023         socket_enter_dead(s, false);
1024 }
1025
1026 static void socket_enter_running(Socket *s, int cfd) {
1027         int r;
1028
1029         assert(s);
1030
1031         if (cfd < 0) {
1032                 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1033                         goto fail;
1034
1035                 socket_set_state(s, SOCKET_RUNNING);
1036         } else {
1037                 Unit *u;
1038                 char *prefix, *instance, *name;
1039
1040                 if (s->n_connections >= s->max_connections) {
1041                         log_warning("Too many incoming connections (%u)", s->n_connections);
1042                         close_nointr_nofail(cfd);
1043                         return;
1044                 }
1045
1046                 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1047                         goto fail;
1048
1049                 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1050                         free(instance);
1051                         r = -ENOMEM;
1052                         goto fail;
1053                 }
1054
1055                 name = unit_name_build(prefix, instance, ".service");
1056                 free(prefix);
1057                 free(instance);
1058
1059                 if (!name) {
1060                         r = -ENOMEM;
1061                         goto fail;
1062                 }
1063
1064                 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1065                 free(name);
1066
1067                 if (r < 0)
1068                         goto fail;
1069
1070                 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1071                         goto fail;
1072
1073                 cfd = -1;
1074
1075                 s->n_connections ++;
1076
1077                 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1078                         goto fail;
1079         }
1080
1081         return;
1082
1083 fail:
1084         log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1085         socket_enter_stop_pre(s, false);
1086
1087         if (cfd >= 0)
1088                 close_nointr_nofail(cfd);
1089 }
1090
1091 static void socket_run_next(Socket *s, bool success) {
1092         int r;
1093
1094         assert(s);
1095         assert(s->control_command);
1096         assert(s->control_command->command_next);
1097
1098         if (!success)
1099                 s->failure = true;
1100
1101         socket_unwatch_control_pid(s);
1102
1103         s->control_command = s->control_command->command_next;
1104
1105         if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1106                 goto fail;
1107
1108         return;
1109
1110 fail:
1111         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1112
1113         if (s->state == SOCKET_START_POST)
1114                 socket_enter_stop_pre(s, false);
1115         else if (s->state == SOCKET_STOP_POST)
1116                 socket_enter_dead(s, false);
1117         else
1118                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1119 }
1120
1121 static int socket_start(Unit *u) {
1122         Socket *s = SOCKET(u);
1123
1124         assert(s);
1125
1126         /* We cannot fulfill this request right now, try again later
1127          * please! */
1128         if (s->state == SOCKET_STOP_PRE ||
1129             s->state == SOCKET_STOP_PRE_SIGKILL ||
1130             s->state == SOCKET_STOP_PRE_SIGTERM ||
1131             s->state == SOCKET_STOP_POST ||
1132             s->state == SOCKET_FINAL_SIGTERM ||
1133             s->state == SOCKET_FINAL_SIGKILL)
1134                 return -EAGAIN;
1135
1136         if (s->state == SOCKET_START_PRE ||
1137             s->state == SOCKET_START_POST)
1138                 return 0;
1139
1140         /* Cannot run this without the service being around */
1141         if (s->service) {
1142                 if (s->service->meta.load_state != UNIT_LOADED)
1143                         return -ENOENT;
1144
1145                 /* If the service is alredy actvie we cannot start the
1146                  * socket */
1147                 if (s->service->state != SERVICE_DEAD &&
1148                     s->service->state != SERVICE_MAINTENANCE &&
1149                     s->service->state != SERVICE_AUTO_RESTART)
1150                         return -EBUSY;
1151         }
1152
1153         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1154
1155         s->failure = false;
1156         socket_enter_start_pre(s);
1157         return 0;
1158 }
1159
1160 static int socket_stop(Unit *u) {
1161         Socket *s = SOCKET(u);
1162
1163         assert(s);
1164
1165         /* We cannot fulfill this request right now, try again later
1166          * please! */
1167         if (s->state == SOCKET_START_PRE ||
1168             s->state == SOCKET_START_POST)
1169                 return -EAGAIN;
1170
1171         /* Already on it */
1172         if (s->state == SOCKET_STOP_PRE ||
1173             s->state == SOCKET_STOP_PRE_SIGTERM ||
1174             s->state == SOCKET_STOP_PRE_SIGKILL ||
1175             s->state == SOCKET_STOP_POST ||
1176             s->state == SOCKET_FINAL_SIGTERM ||
1177             s->state == SOCKET_FINAL_SIGTERM)
1178                 return 0;
1179
1180         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1181
1182         socket_enter_stop_pre(s, true);
1183         return 0;
1184 }
1185
1186 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1187         Socket *s = SOCKET(u);
1188         SocketPort *p;
1189         int r;
1190
1191         assert(u);
1192         assert(f);
1193         assert(fds);
1194
1195         unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1196         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1197         unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1198
1199         if (s->control_pid > 0)
1200                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1201
1202         if (s->control_command_id >= 0)
1203                 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1204
1205         LIST_FOREACH(port, p, s->ports) {
1206                 int copy;
1207
1208                 if (p->fd < 0)
1209                         continue;
1210
1211                 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1212                         return copy;
1213
1214                 if (p->type == SOCKET_SOCKET) {
1215                         char *t;
1216
1217                         if ((r = socket_address_print(&p->address, &t)) < 0)
1218                                 return r;
1219
1220                         unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1221                         free(t);
1222                 } else {
1223                         assert(p->type == SOCKET_FIFO);
1224                         unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1225                 }
1226         }
1227
1228         return 0;
1229 }
1230
1231 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1232         Socket *s = SOCKET(u);
1233         int r;
1234
1235         assert(u);
1236         assert(key);
1237         assert(value);
1238         assert(fds);
1239
1240         if (streq(key, "state")) {
1241                 SocketState state;
1242
1243                 if ((state = socket_state_from_string(value)) < 0)
1244                         log_debug("Failed to parse state value %s", value);
1245                 else
1246                         s->deserialized_state = state;
1247         } else if (streq(key, "failure")) {
1248                 int b;
1249
1250                 if ((b = parse_boolean(value)) < 0)
1251                         log_debug("Failed to parse failure value %s", value);
1252                 else
1253                         s->failure = b || s->failure;
1254
1255         } else if (streq(key, "n-accepted")) {
1256                 unsigned k;
1257
1258                 if ((r = safe_atou(value, &k)) < 0)
1259                         log_debug("Failed to parse n-accepted value %s", value);
1260                 else
1261                         s->n_accepted += k;
1262         } else if (streq(key, "control-pid")) {
1263                 pid_t pid;
1264
1265                 if ((r = parse_pid(value, &pid)) < 0)
1266                         log_debug("Failed to parse control-pid value %s", value);
1267                 else
1268                         s->control_pid = pid;
1269         } else if (streq(key, "control-command")) {
1270                 SocketExecCommand id;
1271
1272                 if ((id = socket_exec_command_from_string(value)) < 0)
1273                         log_debug("Failed to parse exec-command value %s", value);
1274                 else {
1275                         s->control_command_id = id;
1276                         s->control_command = s->exec_command[id];
1277                 }
1278         } else if (streq(key, "fifo")) {
1279                 int fd, skip = 0;
1280                 SocketPort *p;
1281
1282                 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1283                         log_debug("Failed to parse fifo value %s", value);
1284                 else {
1285
1286                         LIST_FOREACH(port, p, s->ports)
1287                                 if (streq(p->path, value+skip))
1288                                         break;
1289
1290                         if (p) {
1291                                 if (p->fd >= 0)
1292                                         close_nointr_nofail(p->fd);
1293                                 p->fd = fdset_remove(fds, fd);
1294                         }
1295                 }
1296
1297         } else if (streq(key, "socket")) {
1298                 int fd, type, skip = 0;
1299                 SocketPort *p;
1300
1301                 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1302                         log_debug("Failed to parse socket value %s", value);
1303                 else {
1304
1305                         LIST_FOREACH(port, p, s->ports)
1306                                 if (socket_address_is(&p->address, value+skip, type))
1307                                         break;
1308
1309                         if (p) {
1310                                 if (p->fd >= 0)
1311                                         close_nointr_nofail(p->fd);
1312                                 p->fd = fdset_remove(fds, fd);
1313                         }
1314                 }
1315
1316         } else
1317                 log_debug("Unknown serialization key '%s'", key);
1318
1319         return 0;
1320 }
1321
1322 static UnitActiveState socket_active_state(Unit *u) {
1323         assert(u);
1324
1325         return state_translation_table[SOCKET(u)->state];
1326 }
1327
1328 static const char *socket_sub_state_to_string(Unit *u) {
1329         assert(u);
1330
1331         return socket_state_to_string(SOCKET(u)->state);
1332 }
1333
1334 static bool socket_check_gc(Unit *u) {
1335         Socket *s = SOCKET(u);
1336
1337         assert(u);
1338
1339         return s->n_connections > 0;
1340 }
1341
1342 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1343         Socket *s = SOCKET(u);
1344         int cfd = -1;
1345
1346         assert(s);
1347         assert(fd >= 0);
1348
1349         if (s->state != SOCKET_LISTENING)
1350                 return;
1351
1352         log_debug("Incoming traffic on %s", u->meta.id);
1353
1354         if (events != EPOLLIN) {
1355                 log_error("Got invalid poll event on socket.");
1356                 goto fail;
1357         }
1358
1359         if (w->socket_accept) {
1360                 for (;;) {
1361
1362                         if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1363
1364                                 if (errno == EINTR)
1365                                         continue;
1366
1367                                 log_error("Failed to accept socket: %m");
1368                                 goto fail;
1369                         }
1370
1371                         break;
1372                 }
1373
1374                 socket_apply_socket_options(s, cfd);
1375         }
1376
1377         socket_enter_running(s, cfd);
1378         return;
1379
1380 fail:
1381         socket_enter_stop_pre(s, false);
1382 }
1383
1384 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1385         Socket *s = SOCKET(u);
1386         bool success;
1387
1388         assert(s);
1389         assert(pid >= 0);
1390
1391         if (pid != s->control_pid)
1392                 return;
1393
1394         s->control_pid = 0;
1395
1396         success = is_clean_exit(code, status);
1397         s->failure = s->failure || !success;
1398
1399         if (s->control_command)
1400                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1401
1402         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1403
1404         if (s->control_command && s->control_command->command_next && success) {
1405                 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1406                 socket_run_next(s, success);
1407         } else {
1408                 s->control_command = NULL;
1409                 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1410
1411                 /* No further commands for this step, so let's figure
1412                  * out what to do next */
1413
1414                 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1415
1416                 switch (s->state) {
1417
1418                 case SOCKET_START_PRE:
1419                         if (success)
1420                                 socket_enter_start_post(s);
1421                         else
1422                                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1423                         break;
1424
1425                 case SOCKET_START_POST:
1426                         if (success)
1427                                 socket_enter_listening(s);
1428                         else
1429                                 socket_enter_stop_pre(s, false);
1430                         break;
1431
1432                 case SOCKET_STOP_PRE:
1433                 case SOCKET_STOP_PRE_SIGTERM:
1434                 case SOCKET_STOP_PRE_SIGKILL:
1435                         socket_enter_stop_post(s, success);
1436                         break;
1437
1438                 case SOCKET_STOP_POST:
1439                 case SOCKET_FINAL_SIGTERM:
1440                 case SOCKET_FINAL_SIGKILL:
1441                         socket_enter_dead(s, success);
1442                         break;
1443
1444                 default:
1445                         assert_not_reached("Uh, control process died at wrong time.");
1446                 }
1447         }
1448 }
1449
1450 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1451         Socket *s = SOCKET(u);
1452
1453         assert(s);
1454         assert(elapsed == 1);
1455         assert(w == &s->timer_watch);
1456
1457         switch (s->state) {
1458
1459         case SOCKET_START_PRE:
1460                 log_warning("%s starting timed out. Terminating.", u->meta.id);
1461                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1462
1463         case SOCKET_START_POST:
1464                 log_warning("%s starting timed out. Stopping.", u->meta.id);
1465                 socket_enter_stop_pre(s, false);
1466                 break;
1467
1468         case SOCKET_STOP_PRE:
1469                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1470                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1471                 break;
1472
1473         case SOCKET_STOP_PRE_SIGTERM:
1474                 log_warning("%s stopping timed out. Killing.", u->meta.id);
1475                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1476                 break;
1477
1478         case SOCKET_STOP_PRE_SIGKILL:
1479                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1480                 socket_enter_stop_post(s, false);
1481                 break;
1482
1483         case SOCKET_STOP_POST:
1484                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1485                 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1486                 break;
1487
1488         case SOCKET_FINAL_SIGTERM:
1489                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1490                 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1491                 break;
1492
1493         case SOCKET_FINAL_SIGKILL:
1494                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1495                 socket_enter_dead(s, false);
1496                 break;
1497
1498         default:
1499                 assert_not_reached("Timeout at wrong time.");
1500         }
1501 }
1502
1503 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1504         int *rfds;
1505         unsigned rn_fds, k;
1506         SocketPort *p;
1507
1508         assert(s);
1509         assert(fds);
1510         assert(n_fds);
1511
1512         /* Called from the service code for requesting our fds */
1513
1514         rn_fds = 0;
1515         LIST_FOREACH(port, p, s->ports)
1516                 if (p->fd >= 0)
1517                         rn_fds++;
1518
1519         if (!(rfds = new(int, rn_fds)) < 0)
1520                 return -ENOMEM;
1521
1522         k = 0;
1523         LIST_FOREACH(port, p, s->ports)
1524                 if (p->fd >= 0)
1525                         rfds[k++] = p->fd;
1526
1527         assert(k == rn_fds);
1528
1529         *fds = rfds;
1530         *n_fds = rn_fds;
1531
1532         return 0;
1533 }
1534
1535 void socket_notify_service_dead(Socket *s) {
1536         assert(s);
1537
1538         /* The service is dead. Dang!
1539          *
1540          * This is strictly for one-instance-for-all-connections
1541          * services. */
1542
1543         if (s->state == SOCKET_RUNNING) {
1544                 log_debug("%s got notified about service death.", s->meta.id);
1545                 socket_enter_listening(s);
1546         }
1547 }
1548
1549 void socket_connection_unref(Socket *s) {
1550         assert(s);
1551
1552         /* The service is dead. Yay!
1553          *
1554          * This is strictly for one-onstance-per-connection
1555          * services. */
1556
1557         assert(s->n_connections > 0);
1558         s->n_connections--;
1559
1560         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1561 }
1562
1563 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1564         [SOCKET_DEAD] = "dead",
1565         [SOCKET_START_PRE] = "start-pre",
1566         [SOCKET_START_POST] = "start-post",
1567         [SOCKET_LISTENING] = "listening",
1568         [SOCKET_RUNNING] = "running",
1569         [SOCKET_STOP_PRE] = "stop-pre",
1570         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1571         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1572         [SOCKET_STOP_POST] = "stop-post",
1573         [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1574         [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1575         [SOCKET_MAINTENANCE] = "maintenance"
1576 };
1577
1578 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1579
1580 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1581         [SOCKET_EXEC_START_PRE] = "StartPre",
1582         [SOCKET_EXEC_START_POST] = "StartPost",
1583         [SOCKET_EXEC_STOP_PRE] = "StopPre",
1584         [SOCKET_EXEC_STOP_POST] = "StopPost"
1585 };
1586
1587 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1588
1589 const UnitVTable socket_vtable = {
1590         .suffix = ".socket",
1591
1592         .init = socket_init,
1593         .done = socket_done,
1594         .load = socket_load,
1595
1596         .coldplug = socket_coldplug,
1597
1598         .dump = socket_dump,
1599
1600         .start = socket_start,
1601         .stop = socket_stop,
1602
1603         .serialize = socket_serialize,
1604         .deserialize_item = socket_deserialize_item,
1605
1606         .active_state = socket_active_state,
1607         .sub_state_to_string = socket_sub_state_to_string,
1608
1609         .check_gc = socket_check_gc,
1610
1611         .fd_event = socket_fd_event,
1612         .sigchld_event = socket_sigchld_event,
1613         .timer_event = socket_timer_event,
1614
1615         .bus_message_handler = bus_socket_message_handler
1616 };