src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <netinet/in.h>
   4 #include <sys/socket.h>
   5 #include <unistd.h>
   6 #include <linux/if.h>
   7 #include <linux/fib_rules.h>
   8 #include <linux/nexthop.h>
   9 #include <linux/nl80211.h>
  10
  11 #include "sd-netlink.h"
  12
  13 #include "alloc-util.h"
  14 #include "bus-error.h"
  15 #include "bus-locator.h"
  16 #include "bus-log-control-api.h"
  17 #include "bus-polkit.h"
  18 #include "bus-util.h"
  19 #include "common-signal.h"
  20 #include "conf-parser.h"
  21 #include "constants.h"
  22 #include "daemon-util.h"
  23 #include "device-private.h"
  24 #include "device-util.h"
  25 #include "dns-domain.h"
  26 #include "fd-util.h"
  27 #include "fileio.h"
  28 #include "firewall-util.h"
  29 #include "fs-util.h"
  30 #include "initrd-util.h"
  31 #include "local-addresses.h"
  32 #include "netlink-util.h"
  33 #include "network-internal.h"
  34 #include "networkd-address-pool.h"
  35 #include "networkd-address.h"
  36 #include "networkd-dhcp-server-bus.h"
  37 #include "networkd-dhcp6.h"
  38 #include "networkd-link-bus.h"
  39 #include "networkd-manager.h"
  40 #include "networkd-manager-bus.h"
  41 #include "networkd-manager-varlink.h"
  42 #include "networkd-neighbor.h"
  43 #include "networkd-network-bus.h"
  44 #include "networkd-nexthop.h"
  45 #include "networkd-queue.h"
  46 #include "networkd-route.h"
  47 #include "networkd-routing-policy-rule.h"
  48 #include "networkd-speed-meter.h"
  49 #include "networkd-state-file.h"
  50 #include "networkd-wifi.h"
  51 #include "networkd-wiphy.h"
  52 #include "ordered-set.h"
  53 #include "path-lookup.h"
  54 #include "path-util.h"
  55 #include "qdisc.h"
  56 #include "selinux-util.h"
  57 #include "set.h"
  58 #include "signal-util.h"
  59 #include "stat-util.h"
  60 #include "strv.h"
  61 #include "sysctl-util.h"
  62 #include "tclass.h"
  63 #include "tmpfile-util.h"
  64 #include "tuntap.h"
  65 #include "udev-util.h"
  66
  67 /* use 128 MB for receive socket kernel queue. */
  68 #define RCVBUF_SIZE    (128*1024*1024)
  69
  70 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  71         Manager *m = ASSERT_PTR(userdata);
  72         Link *link;
  73         int b, r;
  74
  75         assert(message);
  76
  77         r = sd_bus_message_read(message, "b", &b);
  78         if (r < 0) {
  79                 bus_log_parse_error(r);
  80                 return 0;
  81         }
  82
  83         if (b)
  84                 return 0;
  85
  86         log_debug("Coming back from suspend, reconfiguring all connections...");
  87
  88         HASHMAP_FOREACH(link, m->links_by_index) {
  89                 r = link_reconfigure(link, /* force = */ true);
  90                 if (r < 0) {
  91                         log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
  92                         link_enter_failed(link);
  93                 }
  94         }
  95
  96         return 0;
  97 }
  98
  99 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 100         Manager *m = ASSERT_PTR(userdata);
 101
 102         assert(message);
 103
 104         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 105         if (m->dynamic_hostname)
 106                 (void) manager_set_hostname(m, m->dynamic_hostname);
 107         if (m->dynamic_timezone)
 108                 (void) manager_set_timezone(m, m->dynamic_timezone);
 109         if (m->product_uuid_requested)
 110                 (void) manager_request_product_uuid(m);
 111
 112         return 0;
 113 }
 114
 115 static int manager_connect_bus(Manager *m) {
 116         int r;
 117
 118         assert(m);
 119         assert(!m->bus);
 120
 121         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 122         if (r < 0)
 123                 return log_error_errno(r, "Failed to connect to bus: %m");
 124
 125         r = bus_add_implementation(m->bus, &manager_object, m);
 126         if (r < 0)
 127                 return r;
 128
 129         r = bus_log_control_api_register(m->bus);
 130         if (r < 0)
 131                 return r;
 132
 133         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 134         if (r < 0)
 135                 return log_error_errno(r, "Failed to request name: %m");
 136
 137         r = sd_bus_attach_event(m->bus, m->event, 0);
 138         if (r < 0)
 139                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 140
 141         r = sd_bus_match_signal_async(
 142                         m->bus,
 143                         NULL,
 144                         "org.freedesktop.DBus.Local",
 145                         NULL,
 146                         "org.freedesktop.DBus.Local",
 147                         "Connected",
 148                         on_connected, NULL, m);
 149         if (r < 0)
 150                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 151
 152         r = bus_match_signal_async(
 153                         m->bus,
 154                         NULL,
 155                         bus_login_mgr,
 156                         "PrepareForSleep",
 157                         match_prepare_for_sleep, NULL, m);
 158         if (r < 0)
 159                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 160
 161         return 0;
 162 }
 163
 164 static int manager_process_uevent(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 165         Manager *m = ASSERT_PTR(userdata);
 166         sd_device_action_t action;
 167         int r;
 168
 169         assert(device);
 170
 171         r = sd_device_get_action(device, &action);
 172         if (r < 0)
 173                 return log_device_warning_errno(device, r, "Failed to get udev action, ignoring: %m");
 174
 175         if (device_in_subsystem(device, "net"))
 176                 r = manager_udev_process_link(m, device, action);
 177         else if (device_in_subsystem(device, "ieee80211"))
 178                 r = manager_udev_process_wiphy(m, device, action);
 179         else if (device_in_subsystem(device, "rfkill"))
 180                 r = manager_udev_process_rfkill(m, device, action);
 181         if (r < 0)
 182                 log_device_warning_errno(device, r, "Failed to process \"%s\" uevent, ignoring: %m",
 183                                          device_action_to_string(action));
 184
 185         return 0;
 186 }
 187
 188 static int manager_connect_udev(Manager *m) {
 189         int r;
 190
 191         /* udev does not initialize devices inside containers, so we rely on them being already
 192          * initialized before entering the container. */
 193         if (!udev_available())
 194                 return 0;
 195
 196         r = sd_device_monitor_new(&m->device_monitor);
 197         if (r < 0)
 198                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 199
 200         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 201         if (r < 0)
 202                 return log_error_errno(r, "Could not add device monitor filter for net subsystem: %m");
 203
 204         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "ieee80211", NULL);
 205         if (r < 0)
 206                 return log_error_errno(r, "Could not add device monitor filter for ieee80211 subsystem: %m");
 207
 208         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "rfkill", NULL);
 209         if (r < 0)
 210                 return log_error_errno(r, "Could not add device monitor filter for rfkill subsystem: %m");
 211
 212         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 213         if (r < 0)
 214                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 215
 216         r = sd_device_monitor_start(m->device_monitor, manager_process_uevent, m);
 217         if (r < 0)
 218                 return log_error_errno(r, "Failed to start device monitor: %m");
 219
 220         return 0;
 221 }
 222
 223 static int manager_listen_fds(Manager *m, int *ret_rtnl_fd) {
 224         _cleanup_strv_free_ char **names = NULL;
 225         int n, rtnl_fd = -EBADF;
 226
 227         assert(m);
 228         assert(ret_rtnl_fd);
 229
 230         n = sd_listen_fds_with_names(/* unset_environment = */ true, &names);
 231         if (n < 0)
 232                 return n;
 233
 234         if (strv_length(names) != (size_t) n)
 235                 return -EINVAL;
 236
 237         for (int i = 0; i < n; i++) {
 238                 int fd = i + SD_LISTEN_FDS_START;
 239
 240                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 241                         if (rtnl_fd >= 0) {
 242                                 log_debug("Received multiple netlink socket, ignoring.");
 243                                 safe_close(fd);
 244                                 continue;
 245                         }
 246
 247                         rtnl_fd = fd;
 248                         continue;
 249                 }
 250
 251                 if (manager_add_tuntap_fd(m, fd, names[i]) >= 0)
 252                         continue;
 253
 254                 if (m->test_mode)
 255                         safe_close(fd);
 256                 else
 257                         close_and_notify_warn(fd, names[i]);
 258         }
 259
 260         *ret_rtnl_fd = rtnl_fd;
 261         return 0;
 262 }
 263
 264 static int manager_connect_genl(Manager *m) {
 265         int r;
 266
 267         assert(m);
 268
 269         r = sd_genl_socket_open(&m->genl);
 270         if (r < 0)
 271                 return r;
 272
 273         r = sd_netlink_increase_rxbuf(m->genl, RCVBUF_SIZE);
 274         if (r < 0)
 275                 log_warning_errno(r, "Failed to increase receive buffer size for general netlink socket, ignoring: %m");
 276
 277         r = sd_netlink_attach_event(m->genl, m->event, 0);
 278         if (r < 0)
 279                 return r;
 280
 281         r = genl_add_match(m->genl, NULL, NL80211_GENL_NAME, NL80211_MULTICAST_GROUP_CONFIG, 0,
 282                            &manager_genl_process_nl80211_config, NULL, m, "network-genl_process_nl80211_config");
 283         if (r < 0 && r != -EOPNOTSUPP)
 284                 return r;
 285
 286         r = genl_add_match(m->genl, NULL, NL80211_GENL_NAME, NL80211_MULTICAST_GROUP_MLME, 0,
 287                            &manager_genl_process_nl80211_mlme, NULL, m, "network-genl_process_nl80211_mlme");
 288         if (r < 0 && r != -EOPNOTSUPP)
 289                 return r;
 290
 291         return 0;
 292 }
 293
 294 static int manager_setup_rtnl_filter(Manager *manager) {
 295         struct sock_filter filter[] = {
 296                 /* Check the packet length. */
 297                 BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),                                      /* A <- packet length */
 298                 BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct nlmsghdr), 1, 0),         /* A (packet length) >= sizeof(struct nlmsghdr) ? */
 299                 BPF_STMT(BPF_RET + BPF_K, 0),                                               /* reject */
 300                 /* Always accept multipart message. */
 301                 BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct nlmsghdr, nlmsg_flags)), /* A <- message flags */
 302                 BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, htobe16(NLM_F_MULTI), 0, 1),           /* message flags has NLM_F_MULTI ? */
 303                 BPF_STMT(BPF_RET + BPF_K, UINT32_MAX),                                      /* accept */
 304                 /* Accept all message types except for RTM_NEWNEIGH or RTM_DELNEIGH. */
 305                 BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct nlmsghdr, nlmsg_type)),  /* A <- message type */
 306                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, htobe16(RTM_NEWNEIGH), 2, 0),           /* message type == RTM_NEWNEIGH ? */
 307                 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, htobe16(RTM_DELNEIGH), 1, 0),           /* message type == RTM_DELNEIGH ? */
 308                 BPF_STMT(BPF_RET + BPF_K, UINT32_MAX),                                      /* accept */
 309                 /* Check the packet length. */
 310                 BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),                                      /* A <- packet length */
 311                 BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct nlmsghdr) + sizeof(struct ndmsg), 1, 0),
 312                                                                                             /* packet length >= sizeof(struct nlmsghdr) + sizeof(struct ndmsg) ? */
 313                 BPF_STMT(BPF_RET + BPF_K, 0),                                               /* reject */
 314                 /* Reject the message when the neighbor state does not have NUD_PERMANENT flag. */
 315                 BPF_STMT(BPF_LD + BPF_H + BPF_ABS, sizeof(struct nlmsghdr) + offsetof(struct ndmsg, ndm_state)),
 316                                                                                             /* A <- neighbor state */
 317                 BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, htobe16(NUD_PERMANENT), 1, 0),         /* neighbor state has NUD_PERMANENT ? */
 318                 BPF_STMT(BPF_RET + BPF_K, 0),                                               /* reject */
 319                 BPF_STMT(BPF_RET + BPF_K, UINT32_MAX),                                      /* accept */
 320         };
 321
 322         assert(manager);
 323         assert(manager->rtnl);
 324
 325         return sd_netlink_attach_filter(manager->rtnl, ELEMENTSOF(filter), filter);
 326 }
 327
 328 static int manager_connect_rtnl(Manager *m, int fd) {
 329         _unused_ _cleanup_close_ int fd_close = fd;
 330         int r;
 331
 332         assert(m);
 333
 334         /* This takes input fd. */
 335
 336         if (fd < 0)
 337                 r = sd_netlink_open(&m->rtnl);
 338         else
 339                 r = sd_netlink_open_fd(&m->rtnl, fd);
 340         if (r < 0)
 341                 return r;
 342         TAKE_FD(fd_close);
 343
 344         /* Bump receiver buffer, but only if we are not called via socket activation, as in that
 345          * case systemd sets the receive buffer size for us, and the value in the .socket unit
 346          * should take full effect. */
 347         if (fd < 0) {
 348                 r = sd_netlink_increase_rxbuf(m->rtnl, RCVBUF_SIZE);
 349                 if (r < 0)
 350                         log_warning_errno(r, "Failed to increase receive buffer size for rtnl socket, ignoring: %m");
 351         }
 352
 353         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 354         if (r < 0)
 355                 return r;
 356
 357         r = netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 358         if (r < 0)
 359                 return r;
 360
 361         r = netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 362         if (r < 0)
 363                 return r;
 364
 365         r = netlink_add_match(m->rtnl, NULL, RTM_NEWQDISC, &manager_rtnl_process_qdisc, NULL, m, "network-rtnl_process_qdisc");
 366         if (r < 0)
 367                 return r;
 368
 369         r = netlink_add_match(m->rtnl, NULL, RTM_DELQDISC, &manager_rtnl_process_qdisc, NULL, m, "network-rtnl_process_qdisc");
 370         if (r < 0)
 371                 return r;
 372
 373         r = netlink_add_match(m->rtnl, NULL, RTM_NEWTCLASS, &manager_rtnl_process_tclass, NULL, m, "network-rtnl_process_tclass");
 374         if (r < 0)
 375                 return r;
 376
 377         r = netlink_add_match(m->rtnl, NULL, RTM_DELTCLASS, &manager_rtnl_process_tclass, NULL, m, "network-rtnl_process_tclass");
 378         if (r < 0)
 379                 return r;
 380
 381         r = netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 382         if (r < 0)
 383                 return r;
 384
 385         r = netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 386         if (r < 0)
 387                 return r;
 388
 389         r = netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
 390         if (r < 0)
 391                 return r;
 392
 393         r = netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
 394         if (r < 0)
 395                 return r;
 396
 397         r = netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 398         if (r < 0)
 399                 return r;
 400
 401         r = netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 402         if (r < 0)
 403                 return r;
 404
 405         r = netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 406         if (r < 0)
 407                 return r;
 408
 409         r = netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 410         if (r < 0)
 411                 return r;
 412
 413         r = netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
 414         if (r < 0)
 415                 return r;
 416
 417         r = netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
 418         if (r < 0)
 419                 return r;
 420
 421         return manager_setup_rtnl_filter(m);
 422 }
 423
 424 static int manager_post_handler(sd_event_source *s, void *userdata) {
 425         Manager *manager = ASSERT_PTR(userdata);
 426
 427         (void) manager_process_remove_requests(manager);
 428         (void) manager_process_requests(manager);
 429         (void) manager_clean_all(manager);
 430         return 0;
 431 }
 432
 433 static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
 434         Manager *m = ASSERT_PTR(userdata);
 435
 436         m->restarting = false;
 437
 438         log_debug("Terminate operation initiated.");
 439
 440         return sd_event_exit(sd_event_source_get_event(s), 0);
 441 }
 442
 443 static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
 444         Manager *m = ASSERT_PTR(userdata);
 445
 446         m->restarting = true;
 447
 448         log_debug("Restart operation initiated.");
 449
 450         return sd_event_exit(sd_event_source_get_event(s), 0);
 451 }
 452
 453 static int signal_reload_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
 454         Manager *m = ASSERT_PTR(userdata);
 455
 456         (void) manager_reload(m, /* message = */ NULL);
 457
 458         return 0;
 459 }
 460
 461 static int manager_set_keep_configuration(Manager *m) {
 462         int r;
 463
 464         assert(m);
 465
 466         if (in_initrd()) {
 467                 log_debug("Running in initrd, keep DHCPv4 addresses on stopping networkd by default.");
 468                 m->keep_configuration = KEEP_CONFIGURATION_DHCP_ON_STOP;
 469                 return 0;
 470         }
 471
 472         r = path_is_network_fs("/");
 473         if (r < 0)
 474                 return log_error_errno(r, "Failed to detect if root is network filesystem: %m");
 475         if (r == 0) {
 476                 m->keep_configuration = _KEEP_CONFIGURATION_INVALID;
 477                 return 0;
 478         }
 479
 480         log_debug("Running on network filesystem, enabling KeepConfiguration= by default.");
 481         m->keep_configuration = KEEP_CONFIGURATION_YES;
 482         return 0;
 483 }
 484
 485 int manager_setup(Manager *m) {
 486         _cleanup_close_ int rtnl_fd = -EBADF;
 487         int r;
 488
 489         assert(m);
 490
 491         r = sd_event_default(&m->event);
 492         if (r < 0)
 493                 return r;
 494
 495         (void) sd_event_set_watchdog(m->event, true);
 496         (void) sd_event_add_signal(m->event, NULL, SIGTERM | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m);
 497         (void) sd_event_add_signal(m->event, NULL, SIGINT | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m);
 498         (void) sd_event_add_signal(m->event, NULL, SIGUSR2 | SD_EVENT_SIGNAL_PROCMASK, signal_restart_callback, m);
 499         (void) sd_event_add_signal(m->event, NULL, SIGHUP | SD_EVENT_SIGNAL_PROCMASK, signal_reload_callback, m);
 500         (void) sd_event_add_signal(m->event, NULL, (SIGRTMIN+18) | SD_EVENT_SIGNAL_PROCMASK, sigrtmin18_handler, NULL);
 501
 502         r = sd_event_add_memory_pressure(m->event, NULL, NULL, NULL);
 503         if (r < 0)
 504                 log_debug_errno(r, "Failed allocate memory pressure event source, ignoring: %m");
 505
 506         r = sd_event_add_post(m->event, NULL, manager_post_handler, m);
 507         if (r < 0)
 508                 return r;
 509
 510         r = manager_listen_fds(m, &rtnl_fd);
 511         if (r < 0)
 512                 return r;
 513
 514         r = manager_connect_rtnl(m, TAKE_FD(rtnl_fd));
 515         if (r < 0)
 516                 return r;
 517
 518         r = manager_connect_genl(m);
 519         if (r < 0)
 520                 return r;
 521
 522         if (m->test_mode)
 523                 return 0;
 524
 525         r = manager_connect_varlink(m);
 526         if (r < 0)
 527                 return r;
 528
 529         r = manager_connect_bus(m);
 530         if (r < 0)
 531                 return r;
 532
 533         r = manager_connect_udev(m);
 534         if (r < 0)
 535                 return r;
 536
 537         r = sd_resolve_default(&m->resolve);
 538         if (r < 0)
 539                 return r;
 540
 541         r = sd_resolve_attach_event(m->resolve, m->event, 0);
 542         if (r < 0)
 543                 return r;
 544
 545         r = address_pool_setup_default(m);
 546         if (r < 0)
 547                 return r;
 548
 549         r = manager_set_keep_configuration(m);
 550         if (r < 0)
 551                 return r;
 552
 553         m->state_file = strdup("/run/systemd/netif/state");
 554         if (!m->state_file)
 555                 return -ENOMEM;
 556
 557         return 0;
 558 }
 559
 560 int manager_new(Manager **ret, bool test_mode) {
 561         _cleanup_(manager_freep) Manager *m = NULL;
 562
 563         m = new(Manager, 1);
 564         if (!m)
 565                 return -ENOMEM;
 566
 567         *m = (Manager) {
 568                 .keep_configuration = _KEEP_CONFIGURATION_INVALID,
 569                 .ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO,
 570                 .test_mode = test_mode,
 571                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
 572                 .online_state = _LINK_ONLINE_STATE_INVALID,
 573                 .manage_foreign_routes = true,
 574                 .manage_foreign_rules = true,
 575                 .manage_foreign_nexthops = true,
 576                 .ethtool_fd = -EBADF,
 577                 .dhcp_duid.type = DUID_TYPE_EN,
 578                 .dhcp6_duid.type = DUID_TYPE_EN,
 579                 .duid_product_uuid.type = DUID_TYPE_UUID,
 580         };
 581
 582         *ret = TAKE_PTR(m);
 583         return 0;
 584 }
 585
 586 Manager* manager_free(Manager *m) {
 587         Link *link;
 588
 589         if (!m)
 590                 return NULL;
 591
 592         free(m->state_file);
 593
 594         HASHMAP_FOREACH(link, m->links_by_index)
 595                 (void) link_stop_engines(link, true);
 596
 597         m->request_queue = ordered_set_free(m->request_queue);
 598         m->remove_request_queue = ordered_set_free(m->remove_request_queue);
 599
 600         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
 601         m->new_wlan_ifindices = set_free(m->new_wlan_ifindices);
 602         m->links_by_name = hashmap_free(m->links_by_name);
 603         m->links_by_hw_addr = hashmap_free(m->links_by_hw_addr);
 604         m->links_by_dhcp_pd_subnet_prefix = hashmap_free(m->links_by_dhcp_pd_subnet_prefix);
 605         m->links_by_index = hashmap_free_with_destructor(m->links_by_index, link_unref);
 606
 607         m->dhcp_pd_subnet_ids = set_free(m->dhcp_pd_subnet_ids);
 608         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
 609
 610         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
 611
 612         m->tuntap_fds_by_name = hashmap_free(m->tuntap_fds_by_name);
 613
 614         m->wiphy_by_name = hashmap_free(m->wiphy_by_name);
 615         m->wiphy_by_index = hashmap_free_with_destructor(m->wiphy_by_index, wiphy_free);
 616
 617         ordered_set_free_free(m->address_pools);
 618
 619         hashmap_free(m->route_table_names_by_number);
 620         hashmap_free(m->route_table_numbers_by_name);
 621
 622         set_free(m->rules);
 623
 624         sd_netlink_unref(m->rtnl);
 625         sd_netlink_unref(m->genl);
 626         sd_resolve_unref(m->resolve);
 627
 628         /* reject (e.g. unreachable) type routes are managed by Manager, but may be referenced by a
 629          * link. E.g., DHCP6 with prefix delegation creates unreachable routes, and they are referenced
 630          * by the upstream link. And the links may be referenced by netlink slots. Hence, two
 631          * set_free() must be called after the above sd_netlink_unref(). */
 632         m->routes = set_free(m->routes);
 633
 634         m->nexthops_by_id = hashmap_free(m->nexthops_by_id);
 635         m->nexthop_ids = set_free(m->nexthop_ids);
 636
 637         sd_event_source_unref(m->speed_meter_event_source);
 638         sd_event_unref(m->event);
 639
 640         sd_device_monitor_unref(m->device_monitor);
 641
 642         manager_varlink_done(m);
 643         hashmap_free(m->polkit_registry);
 644         sd_bus_flush_close_unref(m->bus);
 645
 646         free(m->dynamic_timezone);
 647         free(m->dynamic_hostname);
 648
 649         safe_close(m->ethtool_fd);
 650
 651         m->fw_ctx = fw_ctx_free(m->fw_ctx);
 652
 653         return mfree(m);
 654 }
 655
 656 int manager_start(Manager *m) {
 657         Link *link;
 658         int r;
 659
 660         assert(m);
 661
 662         r = manager_start_speed_meter(m);
 663         if (r < 0)
 664                 return log_error_errno(r, "Failed to initialize speed meter: %m");
 665
 666         /* The dirty handler will deal with future serialization, but the first one
 667            must be done explicitly. */
 668
 669         r = manager_save(m);
 670         if (r < 0)
 671                 log_warning_errno(r, "Failed to update state file %s, ignoring: %m", m->state_file);
 672
 673         HASHMAP_FOREACH(link, m->links_by_index) {
 674                 r = link_save_and_clean(link);
 675                 if (r < 0)
 676                         log_link_warning_errno(link, r, "Failed to update link state file %s, ignoring: %m", link->state_file);
 677         }
 678
 679         return 0;
 680 }
 681
 682 int manager_load_config(Manager *m) {
 683         int r;
 684
 685         r = netdev_load(m, false);
 686         if (r < 0)
 687                 return r;
 688
 689         manager_clear_unmanaged_tuntap_fds(m);
 690
 691         r = network_load(m, &m->networks);
 692         if (r < 0)
 693                 return r;
 694
 695         r = manager_build_dhcp_pd_subnet_ids(m);
 696         if (r < 0)
 697                 return r;
 698
 699         r = manager_build_nexthop_ids(m);
 700         if (r < 0)
 701                 return r;
 702
 703         return 0;
 704 }
 705
 706 int manager_enumerate_internal(
 707                 Manager *m,
 708                 sd_netlink *nl,
 709                 sd_netlink_message *req,
 710                 int (*process)(sd_netlink *, sd_netlink_message *, Manager *)) {
 711
 712         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *reply = NULL;
 713         int r;
 714
 715         assert(m);
 716         assert(nl);
 717         assert(req);
 718         assert(process);
 719
 720         r = sd_netlink_message_set_request_dump(req, true);
 721         if (r < 0)
 722                 return r;
 723
 724         r = sd_netlink_call(nl, req, 0, &reply);
 725         if (r < 0)
 726                 return r;
 727
 728         m->enumerating = true;
 729         for (sd_netlink_message *reply_one = reply; reply_one; reply_one = sd_netlink_message_next(reply_one))
 730                 RET_GATHER(r, process(nl, reply_one, m));
 731         m->enumerating = false;
 732
 733         return r;
 734 }
 735
 736 static int manager_enumerate_links(Manager *m) {
 737         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 738         int r;
 739
 740         assert(m);
 741         assert(m->rtnl);
 742
 743         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
 744         if (r < 0)
 745                 return r;
 746
 747         r = manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_link);
 748         if (r < 0)
 749                 return r;
 750
 751         req = sd_netlink_message_unref(req);
 752
 753         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
 754         if (r < 0)
 755                 return r;
 756
 757         r = sd_rtnl_message_link_set_family(req, AF_BRIDGE);
 758         if (r < 0)
 759                 return r;
 760
 761         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_link);
 762 }
 763
 764 static int manager_enumerate_qdisc(Manager *m) {
 765         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 766         int r;
 767
 768         assert(m);
 769         assert(m->rtnl);
 770
 771         r = sd_rtnl_message_new_traffic_control(m->rtnl, &req, RTM_GETQDISC, 0, 0, 0);
 772         if (r < 0)
 773                 return r;
 774
 775         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_qdisc);
 776 }
 777
 778 static int manager_enumerate_tclass(Manager *m) {
 779         Link *link;
 780         int r = 0;
 781
 782         assert(m);
 783         assert(m->rtnl);
 784
 785         /* TC class can be enumerated only per link. See tc_dump_tclass() in net/sched/sched_api.c. */
 786
 787         HASHMAP_FOREACH(link, m->links_by_index)
 788                 RET_GATHER(r, link_enumerate_tclass(link, 0));
 789
 790         return r;
 791 }
 792
 793 static int manager_enumerate_addresses(Manager *m) {
 794         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 795         int r;
 796
 797         assert(m);
 798         assert(m->rtnl);
 799
 800         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
 801         if (r < 0)
 802                 return r;
 803
 804         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_address);
 805 }
 806
 807 static int manager_enumerate_neighbors(Manager *m) {
 808         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 809         int r;
 810
 811         assert(m);
 812         assert(m->rtnl);
 813
 814         r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC);
 815         if (r < 0)
 816                 return r;
 817
 818         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_neighbor);
 819 }
 820
 821 static int manager_enumerate_routes(Manager *m) {
 822         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 823         int r;
 824
 825         assert(m);
 826         assert(m->rtnl);
 827
 828         if (!m->manage_foreign_routes)
 829                 return 0;
 830
 831         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
 832         if (r < 0)
 833                 return r;
 834
 835         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_route);
 836 }
 837
 838 static int manager_enumerate_rules(Manager *m) {
 839         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 840         int r;
 841
 842         assert(m);
 843         assert(m->rtnl);
 844
 845         if (!m->manage_foreign_rules)
 846                 return 0;
 847
 848         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
 849         if (r < 0)
 850                 return r;
 851
 852         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_rule);
 853 }
 854
 855 static int manager_enumerate_nexthop(Manager *m) {
 856         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 857         int r;
 858
 859         assert(m);
 860         assert(m->rtnl);
 861
 862         if (!m->manage_foreign_nexthops)
 863                 return 0;
 864
 865         r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0);
 866         if (r < 0)
 867                 return r;
 868
 869         return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_nexthop);
 870 }
 871
 872 static int manager_enumerate_nl80211_wiphy(Manager *m) {
 873         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 874         int r;
 875
 876         assert(m);
 877         assert(m->genl);
 878
 879         r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_WIPHY, &req);
 880         if (r < 0)
 881                 return r;
 882
 883         return manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_wiphy);
 884 }
 885
 886 static int manager_enumerate_nl80211_config(Manager *m) {
 887         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 888         int r;
 889
 890         assert(m);
 891         assert(m->genl);
 892
 893         r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_INTERFACE, &req);
 894         if (r < 0)
 895                 return r;
 896
 897         return manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_config);
 898 }
 899
 900 static int manager_enumerate_nl80211_mlme(Manager *m) {
 901         Link *link;
 902         int r;
 903
 904         assert(m);
 905         assert(m->genl);
 906
 907         HASHMAP_FOREACH(link, m->links_by_index) {
 908                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 909
 910                 if (link->wlan_iftype != NL80211_IFTYPE_STATION)
 911                         continue;
 912
 913                 r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_STATION, &req);
 914                 if (r < 0)
 915                         return r;
 916
 917                 r = sd_netlink_message_append_u32(req, NL80211_ATTR_IFINDEX, link->ifindex);
 918                 if (r < 0)
 919                         return r;
 920
 921                 r = manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_mlme);
 922                 if (r < 0)
 923                         return r;
 924         }
 925
 926         return 0;
 927 }
 928
 929 int manager_enumerate(Manager *m) {
 930         int r;
 931
 932         r = manager_enumerate_links(m);
 933         if (r < 0)
 934                 return log_error_errno(r, "Could not enumerate links: %m");
 935
 936         r = manager_enumerate_qdisc(m);
 937         if (r == -EOPNOTSUPP)
 938                 log_debug_errno(r, "Could not enumerate QDiscs, ignoring: %m");
 939         else if (r < 0)
 940                 return log_error_errno(r, "Could not enumerate QDisc: %m");
 941
 942         r = manager_enumerate_tclass(m);
 943         if (r == -EOPNOTSUPP)
 944                 log_debug_errno(r, "Could not enumerate TClasses, ignoring: %m");
 945         else if (r < 0)
 946                 return log_error_errno(r, "Could not enumerate TClass: %m");
 947
 948         r = manager_enumerate_addresses(m);
 949         if (r < 0)
 950                 return log_error_errno(r, "Could not enumerate addresses: %m");
 951
 952         r = manager_enumerate_neighbors(m);
 953         if (r < 0)
 954                 return log_error_errno(r, "Could not enumerate neighbors: %m");
 955
 956         /* NextHop support is added in kernel v5.3 (65ee00a9409f751188a8cdc0988167858eb4a536),
 957          * and older kernels return -EOPNOTSUPP, or -EINVAL if SELinux is enabled. */
 958         r = manager_enumerate_nexthop(m);
 959         if (r == -EOPNOTSUPP || (r == -EINVAL && mac_selinux_enforcing()))
 960                 log_debug_errno(r, "Could not enumerate nexthops, ignoring: %m");
 961         else if (r < 0)
 962                 return log_error_errno(r, "Could not enumerate nexthops: %m");
 963
 964         r = manager_enumerate_routes(m);
 965         if (r < 0)
 966                 return log_error_errno(r, "Could not enumerate routes: %m");
 967
 968         /* If kernel is built with CONFIG_FIB_RULES=n, it returns -EOPNOTSUPP. */
 969         r = manager_enumerate_rules(m);
 970         if (r == -EOPNOTSUPP)
 971                 log_debug_errno(r, "Could not enumerate routing policy rules, ignoring: %m");
 972         else if (r < 0)
 973                 return log_error_errno(r, "Could not enumerate routing policy rules: %m");
 974
 975         r = manager_enumerate_nl80211_wiphy(m);
 976         if (r == -EOPNOTSUPP)
 977                 log_debug_errno(r, "Could not enumerate wireless LAN phy, ignoring: %m");
 978         else if (r < 0)
 979                 return log_error_errno(r, "Could not enumerate wireless LAN phy: %m");
 980
 981         r = manager_enumerate_nl80211_config(m);
 982         if (r == -EOPNOTSUPP)
 983                 log_debug_errno(r, "Could not enumerate wireless LAN interfaces, ignoring: %m");
 984         else if (r < 0)
 985                 return log_error_errno(r, "Could not enumerate wireless LAN interfaces: %m");
 986
 987         r = manager_enumerate_nl80211_mlme(m);
 988         if (r == -EOPNOTSUPP)
 989                 log_debug_errno(r, "Could not enumerate wireless LAN stations, ignoring: %m");
 990         else if (r < 0)
 991                 return log_error_errno(r, "Could not enumerate wireless LAN stations: %m");
 992
 993         return 0;
 994 }
 995
 996 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
 997         const sd_bus_error *e;
 998         int r;
 999
1000         assert(m);
1001
1002         e = sd_bus_message_get_error(m);
1003         if (e) {
1004                 r = sd_bus_error_get_errno(e);
1005                 log_warning_errno(r, "Could not set hostname: %s", bus_error_message(e, r));
1006         }
1007
1008         return 1;
1009 }
1010
1011 int manager_set_hostname(Manager *m, const char *hostname) {
1012         int r;
1013
1014         log_debug("Setting transient hostname: '%s'", strna(hostname));
1015
1016         r = free_and_strdup_warn(&m->dynamic_hostname, hostname);
1017         if (r < 0)
1018                 return r;
1019
1020         if (sd_bus_is_ready(m->bus) <= 0) {
1021                 log_debug("Not connected to system bus, setting system hostname later.");
1022                 return 0;
1023         }
1024
1025         r = bus_call_method_async(
1026                         m->bus,
1027                         NULL,
1028                         bus_hostname,
1029                         "SetHostname",
1030                         set_hostname_handler,
1031                         m,
1032                         "sb",
1033                         hostname,
1034                         false);
1035         if (r < 0)
1036                 return log_error_errno(r, "Could not set transient hostname: %m");
1037
1038         return 0;
1039 }
1040
1041 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1042         const sd_bus_error *e;
1043         int r;
1044
1045         assert(m);
1046
1047         e = sd_bus_message_get_error(m);
1048         if (e) {
1049                 r = sd_bus_error_get_errno(e);
1050                 log_warning_errno(r, "Could not set timezone: %s", bus_error_message(e, r));
1051         }
1052
1053         return 1;
1054 }
1055
1056 int manager_set_timezone(Manager *m, const char *tz) {
1057         int r;
1058
1059         assert(m);
1060         assert(tz);
1061
1062         log_debug("Setting system timezone: '%s'", tz);
1063         r = free_and_strdup_warn(&m->dynamic_timezone, tz);
1064         if (r < 0)
1065                 return r;
1066
1067         if (sd_bus_is_ready(m->bus) <= 0) {
1068                 log_debug("Not connected to system bus, setting system timezone later.");
1069                 return 0;
1070         }
1071
1072         r = bus_call_method_async(
1073                         m->bus,
1074                         NULL,
1075                         bus_timedate,
1076                         "SetTimezone",
1077                         set_timezone_handler,
1078                         m,
1079                         "sb",
1080                         tz,
1081                         false);
1082         if (r < 0)
1083                 return log_error_errno(r, "Could not set timezone: %m");
1084
1085         return 0;
1086 }
1087
1088 int manager_reload(Manager *m, sd_bus_message *message) {
1089         Link *link;
1090         int r;
1091
1092         assert(m);
1093
1094         (void) sd_notifyf(/* unset= */ false,
1095                           "RELOADING=1\n"
1096                           "STATUS=Reloading configuration...\n"
1097                           "MONOTONIC_USEC=" USEC_FMT, now(CLOCK_MONOTONIC));
1098
1099         r = netdev_load(m, /* reload= */ true);
1100         if (r < 0)
1101                 goto finish;
1102
1103         r = network_reload(m);
1104         if (r < 0)
1105                 goto finish;
1106
1107         HASHMAP_FOREACH(link, m->links_by_index) {
1108                 if (message)
1109                         r = link_reconfigure_on_bus_method_reload(link, message);
1110                 else
1111                         r = link_reconfigure(link, /* force = */ false);
1112                 if (r < 0) {
1113                         log_link_warning_errno(link, r, "Failed to reconfigure the interface: %m");
1114                         link_enter_failed(link);
1115                 }
1116         }
1117
1118         r = 0;
1119 finish:
1120         (void) sd_notify(/* unset= */ false, NOTIFY_READY);
1121         return r;
1122 }