src/network/networkd-network.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4 #include <netinet/in.h>
   5 #include <linux/netdevice.h>
   6 #include <unistd.h>
   7
   8 #include "alloc-util.h"
   9 #include "conf-files.h"
  10 #include "conf-parser.h"
  11 #include "dns-domain.h"
  12 #include "fd-util.h"
  13 #include "hostname-util.h"
  14 #include "in-addr-util.h"
  15 #include "networkd-dhcp-server.h"
  16 #include "network-internal.h"
  17 #include "networkd-manager.h"
  18 #include "networkd-network.h"
  19 #include "parse-util.h"
  20 #include "path-lookup.h"
  21 #include "set.h"
  22 #include "socket-util.h"
  23 #include "stat-util.h"
  24 #include "string-table.h"
  25 #include "string-util.h"
  26 #include "strv.h"
  27 #include "tc.h"
  28 #include "util.h"
  29
  30 /* Let's assume that anything above this number is a user misconfiguration. */
  31 #define MAX_NTP_SERVERS 128
  32
  33 /* Set defaults following RFC7844 */
  34 void network_apply_anonymize_if_set(Network *network) {
  35         if (!network->dhcp_anonymize)
  36                 return;
  37         /* RFC7844 3.7
  38          SHOULD NOT send the Host Name option */
  39         network->dhcp_send_hostname = false;
  40         /* RFC7844 section 3.:
  41          MAY contain the Client Identifier option
  42          Section 3.5:
  43          clients MUST use client identifiers based solely
  44          on the link-layer address */
  45         /* NOTE: Using MAC, as it does not reveal extra information,
  46         * and some servers might not answer if this option is not sent */
  47         network->dhcp_client_identifier = DHCP_CLIENT_ID_MAC;
  48         /* RFC 7844 3.10:
  49          SHOULD NOT use the Vendor Class Identifier option */
  50         network->dhcp_vendor_class_identifier = mfree(network->dhcp_vendor_class_identifier);
  51         /* RFC7844 section 3.6.:
  52          The client intending to protect its privacy SHOULD only request a
  53          minimal number of options in the PRL and SHOULD also randomly shuffle
  54          the ordering of option codes in the PRL.  If this random ordering
  55          cannot be implemented, the client MAY order the option codes in the
  56          PRL by option code number (lowest to highest).
  57         */
  58         /* NOTE: dhcp_use_mtu is false by default,
  59         * though it was not initiallized to any value in network_load_one.
  60         * Maybe there should be another var called *send*?
  61         * (to use the MTU sent by the server but to do not send
  62         * the option in the PRL). */
  63         network->dhcp_use_mtu = false;
  64         /* NOTE: when Anonymize=yes, the PRL route options are sent by default,
  65          * but this is needed to use them. */
  66         network->dhcp_use_routes = true;
  67         /* RFC7844 section 3.6.
  68         * same comments as previous option */
  69         network->dhcp_use_timezone = false;
  70 }
  71
  72 static int network_resolve_netdev_one(Network *network, const char *name, NetDevKind kind, NetDev **ret_netdev) {
  73         const char *kind_string;
  74         NetDev *netdev;
  75         int r;
  76
  77         /* For test-networkd-conf, the check must be earlier than the assertions. */
  78         if (!name)
  79                 return 0;
  80
  81         assert(network);
  82         assert(network->manager);
  83         assert(network->filename);
  84         assert(ret_netdev);
  85
  86         if (kind == _NETDEV_KIND_TUNNEL)
  87                 kind_string = "tunnel";
  88         else {
  89                 kind_string = netdev_kind_to_string(kind);
  90                 if (!kind_string)
  91                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  92                                                "%s: Invalid NetDev kind of %s, ignoring assignment.",
  93                                                network->filename, name);
  94         }
  95
  96         r = netdev_get(network->manager, name, &netdev);
  97         if (r < 0)
  98                 return log_error_errno(r, "%s: %s NetDev could not be found, ignoring assignment.",
  99                                        network->filename, name);
 100
 101         if (netdev->kind != kind && !(kind == _NETDEV_KIND_TUNNEL &&
 102                                       IN_SET(netdev->kind,
 103                                              NETDEV_KIND_IPIP,
 104                                              NETDEV_KIND_SIT,
 105                                              NETDEV_KIND_GRE,
 106                                              NETDEV_KIND_GRETAP,
 107                                              NETDEV_KIND_IP6GRE,
 108                                              NETDEV_KIND_IP6GRETAP,
 109                                              NETDEV_KIND_VTI,
 110                                              NETDEV_KIND_VTI6,
 111                                              NETDEV_KIND_IP6TNL,
 112                                              NETDEV_KIND_ERSPAN)))
 113                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 114                                        "%s: NetDev %s is not a %s, ignoring assignment",
 115                                        network->filename, name, kind_string);
 116
 117         *ret_netdev = netdev_ref(netdev);
 118         return 1;
 119 }
 120
 121 static int network_resolve_stacked_netdevs(Network *network) {
 122         void *name, *kind;
 123         Iterator i;
 124         int r;
 125
 126         assert(network);
 127
 128         HASHMAP_FOREACH_KEY(kind, name, network->stacked_netdev_names, i) {
 129                 _cleanup_(netdev_unrefp) NetDev *netdev = NULL;
 130
 131                 r = network_resolve_netdev_one(network, name, PTR_TO_INT(kind), &netdev);
 132                 if (r <= 0)
 133                         continue;
 134
 135                 r = hashmap_ensure_allocated(&network->stacked_netdevs, &string_hash_ops);
 136                 if (r < 0)
 137                         return log_oom();
 138
 139                 r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
 140                 if (r < 0)
 141                         return log_error_errno(r, "%s: Failed to add NetDev '%s' to network: %m",
 142                                                network->filename, (const char *) name);
 143
 144                 netdev = NULL;
 145         }
 146
 147         return 0;
 148 }
 149
 150 int network_verify(Network *network) {
 151         RoutePrefix *route_prefix, *route_prefix_next;
 152         RoutingPolicyRule *rule, *rule_next;
 153         Neighbor *neighbor, *neighbor_next;
 154         AddressLabel *label, *label_next;
 155         NextHop *nexthop, *nextnop_next;
 156         Address *address, *address_next;
 157         Prefix *prefix, *prefix_next;
 158         Route *route, *route_next;
 159         FdbEntry *fdb, *fdb_next;
 160         TrafficControl *tc;
 161         Iterator i;
 162
 163         assert(network);
 164         assert(network->filename);
 165
 166         if (set_isempty(network->match_mac) && set_isempty(network->match_permanent_mac) &&
 167             strv_isempty(network->match_path) && strv_isempty(network->match_driver) &&
 168             strv_isempty(network->match_type) && strv_isempty(network->match_name) &&
 169             strv_isempty(network->match_property) && strv_isempty(network->match_ssid) && !network->conditions)
 170                 return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
 171                                          "%s: No valid settings found in the [Match] section, ignoring file. "
 172                                          "To match all interfaces, add Name=* in the [Match] section.",
 173                                          network->filename);
 174
 175         /* skip out early if configuration does not match the environment */
 176         if (!condition_test_list(network->conditions, environ, NULL, NULL, NULL))
 177                 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
 178                                        "%s: Conditions in the file do not match the system environment, skipping.",
 179                                        network->filename);
 180
 181         (void) network_resolve_netdev_one(network, network->bond_name, NETDEV_KIND_BOND, &network->bond);
 182         (void) network_resolve_netdev_one(network, network->bridge_name, NETDEV_KIND_BRIDGE, &network->bridge);
 183         (void) network_resolve_netdev_one(network, network->vrf_name, NETDEV_KIND_VRF, &network->vrf);
 184         (void) network_resolve_stacked_netdevs(network);
 185
 186         /* Free unnecessary entries. */
 187         network->bond_name = mfree(network->bond_name);
 188         network->bridge_name = mfree(network->bridge_name);
 189         network->vrf_name = mfree(network->vrf_name);
 190         network->stacked_netdev_names = hashmap_free_free_key(network->stacked_netdev_names);
 191
 192         if (network->bond) {
 193                 /* Bonding slave does not support addressing. */
 194                 if (network->ipv6_accept_ra > 0) {
 195                         log_warning("%s: Cannot enable IPv6AcceptRA= when Bond= is specified, disabling IPv6AcceptRA=.",
 196                                     network->filename);
 197                         network->ipv6_accept_ra = 0;
 198                 }
 199                 if (network->link_local >= 0 && network->link_local != ADDRESS_FAMILY_NO) {
 200                         log_warning("%s: Cannot enable LinkLocalAddressing= when Bond= is specified, disabling LinkLocalAddressing=.",
 201                                     network->filename);
 202                         network->link_local = ADDRESS_FAMILY_NO;
 203                 }
 204                 if (network->dhcp != ADDRESS_FAMILY_NO) {
 205                         log_warning("%s: Cannot enable DHCP= when Bond= is specified, disabling DHCP=.",
 206                                     network->filename);
 207                         network->dhcp = ADDRESS_FAMILY_NO;
 208                 }
 209                 if (network->dhcp_server) {
 210                         log_warning("%s: Cannot enable DHCPServer= when Bond= is specified, disabling DHCPServer=.",
 211                                     network->filename);
 212                         network->dhcp_server = false;
 213                 }
 214                 if (network->n_static_addresses > 0) {
 215                         log_warning("%s: Cannot set addresses when Bond= is specified, ignoring addresses.",
 216                                     network->filename);
 217                         while ((address = network->static_addresses))
 218                                 address_free(address);
 219                 }
 220                 if (network->n_static_routes > 0) {
 221                         log_warning("%s: Cannot set routes when Bond= is specified, ignoring routes.",
 222                                     network->filename);
 223                         while ((route = network->static_routes))
 224                                 route_free(route);
 225                 }
 226         }
 227
 228         if (network->link_local < 0)
 229                 network->link_local = network->bridge ? ADDRESS_FAMILY_NO : ADDRESS_FAMILY_IPV6;
 230
 231         if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) {
 232                 if (network->ipv6_accept_ra > 0) {
 233                         log_warning("%s: IPv6AcceptRA= is enabled by the .network file but IPv6 link local addressing is disabled. "
 234                                     "Disabling IPv6AcceptRA=.", network->filename);
 235                         network->ipv6_accept_ra = false;
 236                 }
 237
 238                 if (FLAGS_SET(network->dhcp, ADDRESS_FAMILY_IPV6)) {
 239                         log_warning("%s: DHCPv6 client is enabled by the .network file but IPv6 link local addressing is disabled. "
 240                                     "Disabling DHCPv6 client.", network->filename);
 241                         SET_FLAG(network->dhcp, ADDRESS_FAMILY_IPV6, false);
 242                 }
 243
 244                 if (network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE) {
 245                         log_warning("%s: IPv6PrefixDelegation= is enabled but IPv6 link local addressing is disabled. "
 246                                     "Disabling IPv6PrefixDelegation=.", network->filename);
 247                         network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE;
 248                 }
 249         }
 250
 251         if (FLAGS_SET(network->link_local, ADDRESS_FAMILY_FALLBACK_IPV4) &&
 252             !FLAGS_SET(network->dhcp, ADDRESS_FAMILY_IPV4)) {
 253                 log_warning("%s: fallback assignment of IPv4 link local address is enabled but DHCPv4 is disabled. "
 254                             "Disabling the fallback assignment.", network->filename);
 255                 SET_FLAG(network->link_local, ADDRESS_FAMILY_FALLBACK_IPV4, false);
 256         }
 257
 258         if (network->ipv6_accept_ra < 0 && network->bridge)
 259                 network->ipv6_accept_ra = false;
 260
 261         /* IPMasquerade=yes implies IPForward=yes */
 262         if (network->ip_masquerade)
 263                 network->ip_forward |= ADDRESS_FAMILY_IPV4;
 264
 265         if (network->mtu > 0 && network->dhcp_use_mtu) {
 266                 log_warning("%s: MTUBytes= in [Link] section and UseMTU= in [DHCP] section are set. "
 267                             "Disabling UseMTU=.", network->filename);
 268                 network->dhcp_use_mtu = false;
 269         }
 270
 271         if (network->dhcp_use_gateway < 0)
 272                 network->dhcp_use_gateway = network->dhcp_use_routes;
 273
 274         if (network->ignore_carrier_loss < 0)
 275                 network->ignore_carrier_loss = network->configure_without_carrier;
 276
 277         if (network->dhcp_critical >= 0) {
 278                 if (network->keep_configuration >= 0)
 279                         log_warning("%s: Both KeepConfiguration= and deprecated CriticalConnection= are set. "
 280                                     "Ignoring CriticalConnection=.", network->filename);
 281                 else if (network->dhcp_critical)
 282                         /* CriticalConnection=yes also preserve foreign static configurations. */
 283                         network->keep_configuration = KEEP_CONFIGURATION_YES;
 284                 else
 285                         network->keep_configuration = KEEP_CONFIGURATION_NO;
 286         }
 287
 288         if (network->keep_configuration < 0)
 289                 network->keep_configuration = KEEP_CONFIGURATION_NO;
 290
 291         LIST_FOREACH_SAFE(addresses, address, address_next, network->static_addresses)
 292                 if (address_section_verify(address) < 0)
 293                         address_free(address);
 294
 295         LIST_FOREACH_SAFE(routes, route, route_next, network->static_routes)
 296                 if (route_section_verify(route, network) < 0)
 297                         route_free(route);
 298
 299         LIST_FOREACH_SAFE(nexthops, nexthop, nextnop_next, network->static_nexthops)
 300                 if (nexthop_section_verify(nexthop) < 0)
 301                         nexthop_free(nexthop);
 302
 303         LIST_FOREACH_SAFE(static_fdb_entries, fdb, fdb_next, network->static_fdb_entries)
 304                 if (section_is_invalid(fdb->section))
 305                         fdb_entry_free(fdb);
 306
 307         LIST_FOREACH_SAFE(neighbors, neighbor, neighbor_next, network->neighbors)
 308                 if (neighbor_section_verify(neighbor) < 0)
 309                         neighbor_free(neighbor);
 310
 311         LIST_FOREACH_SAFE(labels, label, label_next, network->address_labels)
 312                 if (section_is_invalid(label->section))
 313                         address_label_free(label);
 314
 315         LIST_FOREACH_SAFE(prefixes, prefix, prefix_next, network->static_prefixes)
 316                 if (section_is_invalid(prefix->section))
 317                         prefix_free(prefix);
 318
 319         LIST_FOREACH_SAFE(route_prefixes, route_prefix, route_prefix_next, network->static_route_prefixes)
 320                 if (section_is_invalid(route_prefix->section))
 321                         route_prefix_free(route_prefix);
 322
 323         LIST_FOREACH_SAFE(rules, rule, rule_next, network->rules)
 324                 if (routing_policy_rule_section_verify(rule) < 0)
 325                         routing_policy_rule_free(rule);
 326
 327         bool has_root = false, has_clsact = false;
 328         ORDERED_HASHMAP_FOREACH(tc, network->tc_by_section, i)
 329                 if (traffic_control_section_verify(tc, &has_root, &has_clsact) < 0)
 330                         traffic_control_free(tc);
 331
 332         return 0;
 333 }
 334
 335 int network_load_one(Manager *manager, OrderedHashmap **networks, const char *filename) {
 336         _cleanup_free_ char *fname = NULL, *name = NULL;
 337         _cleanup_(network_unrefp) Network *network = NULL;
 338         _cleanup_fclose_ FILE *file = NULL;
 339         const char *dropin_dirname;
 340         char *d;
 341         int r;
 342
 343         assert(manager);
 344         assert(filename);
 345
 346         file = fopen(filename, "re");
 347         if (!file) {
 348                 if (errno == ENOENT)
 349                         return 0;
 350
 351                 return -errno;
 352         }
 353
 354         if (null_or_empty_fd(fileno(file))) {
 355                 log_debug("Skipping empty file: %s", filename);
 356                 return 0;
 357         }
 358
 359         fname = strdup(filename);
 360         if (!fname)
 361                 return log_oom();
 362
 363         name = strdup(basename(filename));
 364         if (!name)
 365                 return log_oom();
 366
 367         d = strrchr(name, '.');
 368         if (!d)
 369                 return -EINVAL;
 370
 371         *d = '\0';
 372
 373         dropin_dirname = strjoina(name, ".network.d");
 374
 375         network = new(Network, 1);
 376         if (!network)
 377                 return log_oom();
 378
 379         *network = (Network) {
 380                 .filename = TAKE_PTR(fname),
 381                 .name = TAKE_PTR(name),
 382
 383                 .manager = manager,
 384                 .n_ref = 1,
 385
 386                 .required_for_online = true,
 387                 .required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT,
 388                 .dhcp = ADDRESS_FAMILY_NO,
 389                 .dhcp_critical = -1,
 390                 .dhcp_use_ntp = true,
 391                 .dhcp_use_sip = true,
 392                 .dhcp_use_dns = true,
 393                 .dhcp_use_hostname = true,
 394                 .dhcp_use_routes = true,
 395                 .dhcp_use_gateway = -1,
 396                 /* NOTE: this var might be overwritten by network_apply_anonymize_if_set */
 397                 .dhcp_send_hostname = true,
 398                 .dhcp_send_release = true,
 399                 /* To enable/disable RFC7844 Anonymity Profiles */
 400                 .dhcp_anonymize = false,
 401                 .dhcp_route_metric = DHCP_ROUTE_METRIC,
 402                 /* NOTE: this var might be overwritten by network_apply_anonymize_if_set */
 403                 .dhcp_client_identifier = DHCP_CLIENT_ID_DUID,
 404                 .dhcp_route_table = RT_TABLE_MAIN,
 405                 .dhcp_route_table_set = false,
 406                 /* NOTE: from man: UseMTU=... Defaults to false*/
 407                 .dhcp_use_mtu = false,
 408                 /* NOTE: from man: UseTimezone=... Defaults to "no".*/
 409                 .dhcp_use_timezone = false,
 410                 .rapid_commit = true,
 411
 412                 .dhcp6_use_ntp = true,
 413                 .dhcp6_use_dns = true,
 414
 415                 .dhcp6_pd_assign_prefix = true,
 416
 417                 .dhcp_server_emit_dns = true,
 418                 .dhcp_server_emit_ntp = true,
 419                 .dhcp_server_emit_sip = true,
 420                 .dhcp_server_emit_router = true,
 421                 .dhcp_server_emit_timezone = true,
 422
 423                 .router_prefix_subnet_id = -1,
 424                 .router_emit_dns = true,
 425                 .router_emit_domains = true,
 426
 427                 .use_bpdu = -1,
 428                 .hairpin = -1,
 429                 .fast_leave = -1,
 430                 .allow_port_to_be_root = -1,
 431                 .unicast_flood = -1,
 432                 .multicast_flood = -1,
 433                 .multicast_to_unicast = -1,
 434                 .neighbor_suppression = -1,
 435                 .learning = -1,
 436                 .bridge_proxy_arp = -1,
 437                 .bridge_proxy_arp_wifi = -1,
 438                 .priority = LINK_BRIDGE_PORT_PRIORITY_INVALID,
 439                 .multicast_router = _MULTICAST_ROUTER_INVALID,
 440
 441                 .lldp_mode = LLDP_MODE_ROUTERS_ONLY,
 442
 443                 .dns_default_route = -1,
 444                 .llmnr = RESOLVE_SUPPORT_YES,
 445                 .mdns = RESOLVE_SUPPORT_NO,
 446                 .dnssec_mode = _DNSSEC_MODE_INVALID,
 447                 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
 448
 449                 /* If LinkLocalAddressing= is not set, then set to ADDRESS_FAMILY_IPV6 later. */
 450                 .link_local = _ADDRESS_FAMILY_INVALID,
 451
 452                 .ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO,
 453                 .ipv6_accept_ra = -1,
 454                 .ipv6_dad_transmits = -1,
 455                 .ipv6_hop_limit = -1,
 456                 .ipv6_proxy_ndp = -1,
 457                 .duid.type = _DUID_TYPE_INVALID,
 458                 .proxy_arp = -1,
 459                 .arp = -1,
 460                 .multicast = -1,
 461                 .allmulticast = -1,
 462                 .ipv6_accept_ra_use_dns = true,
 463                 .ipv6_accept_ra_use_autonomous_prefix = true,
 464                 .ipv6_accept_ra_use_onlink_prefix = true,
 465                 .ipv6_accept_ra_route_table = RT_TABLE_MAIN,
 466                 .ipv6_accept_ra_route_table_set = false,
 467                 .ipv6_accept_ra_start_dhcp6_client = true,
 468
 469                 .configure_without_carrier = false,
 470                 .ignore_carrier_loss = -1,
 471                 .keep_configuration = _KEEP_CONFIGURATION_INVALID,
 472                 .ipv6_address_gen_mode = _LINK_IPV6_ADDRESS_GEN_MODE_INVALID,
 473                 .can_triple_sampling = -1,
 474                 .can_termination = -1,
 475                 .ip_service_type = -1,
 476         };
 477
 478         r = config_parse_many(filename, NETWORK_DIRS, dropin_dirname,
 479                               "Match\0"
 480                               "Link\0"
 481                               "Network\0"
 482                               "Address\0"
 483                               "Neighbor\0"
 484                               "IPv6AddressLabel\0"
 485                               "RoutingPolicyRule\0"
 486                               "Route\0"
 487                               "NextHop\0"
 488                               "DHCP\0" /* compat */
 489                               "DHCPv4\0"
 490                               "DHCPv6\0"
 491                               "DHCPServer\0"
 492                               "IPv6AcceptRA\0"
 493                               "IPv6NDPProxyAddress\0"
 494                               "Bridge\0"
 495                               "BridgeFDB\0"
 496                               "BridgeVLAN\0"
 497                               "IPv6PrefixDelegation\0"
 498                               "IPv6Prefix\0"
 499                               "IPv6RoutePrefix\0"
 500                               "LLDP\0"
 501                               "TrafficControlQueueingDiscipline\0"
 502                               "CAN\0"
 503                               "QDisc\0"
 504                               "BFIFO\0"
 505                               "CAKE\0"
 506                               "ControlledDelay\0"
 507                               "DeficitRoundRobinScheduler\0"
 508                               "DeficitRoundRobinSchedulerClass\0"
 509                               "PFIFO\0"
 510                               "PFIFOFast\0"
 511                               "PFIFOHeadDrop\0"
 512                               "FairQueueing\0"
 513                               "FairQueueingControlledDelay\0"
 514                               "GenericRandomEarlyDetection\0"
 515                               "HeavyHitterFilter\0"
 516                               "HierarchyTokenBucket\0"
 517                               "HierarchyTokenBucketClass\0"
 518                               "NetworkEmulator\0"
 519                               "PIE\0"
 520                               "StochasticFairBlue\0"
 521                               "StochasticFairnessQueueing\0"
 522                               "TokenBucketFilter\0"
 523                               "TrivialLinkEqualizer\0",
 524                               config_item_perf_lookup, network_network_gperf_lookup,
 525                               CONFIG_PARSE_WARN, network);
 526         if (r < 0)
 527                 return r;
 528
 529         network_apply_anonymize_if_set(network);
 530
 531         r = network_add_ipv4ll_route(network);
 532         if (r < 0)
 533                 log_warning_errno(r, "%s: Failed to add IPv4LL route, ignoring: %m", network->filename);
 534
 535         r = network_add_default_route_on_device(network);
 536         if (r < 0)
 537                 log_warning_errno(r, "%s: Failed to add default route on device, ignoring: %m",
 538                                   network->filename);
 539
 540         struct stat stats;
 541         if (stat(filename, &stats) < 0)
 542                 return -errno;
 543         network->timestamp = timespec_load(&stats.st_mtim);
 544
 545         if (network_verify(network) < 0)
 546                 /* Ignore .network files that do not match the conditions. */
 547                 return 0;
 548
 549         r = ordered_hashmap_ensure_allocated(networks, &string_hash_ops);
 550         if (r < 0)
 551                 return r;
 552
 553         r = ordered_hashmap_put(*networks, network->name, network);
 554         if (r < 0)
 555                 return r;
 556
 557         network = NULL;
 558         return 0;
 559 }
 560
 561 int network_load(Manager *manager, OrderedHashmap **networks) {
 562         _cleanup_strv_free_ char **files = NULL;
 563         char **f;
 564         int r;
 565
 566         assert(manager);
 567
 568         ordered_hashmap_clear_with_destructor(*networks, network_unref);
 569
 570         r = conf_files_list_strv(&files, ".network", NULL, 0, NETWORK_DIRS);
 571         if (r < 0)
 572                 return log_error_errno(r, "Failed to enumerate network files: %m");
 573
 574         STRV_FOREACH(f, files) {
 575                 r = network_load_one(manager, networks, *f);
 576                 if (r < 0)
 577                         log_error_errno(r, "Failed to load %s, ignoring: %m", *f);
 578         }
 579
 580         return 0;
 581 }
 582
 583 int network_reload(Manager *manager) {
 584         OrderedHashmap *new_networks = NULL;
 585         Network *n, *old;
 586         Iterator i;
 587         int r;
 588
 589         assert(manager);
 590
 591         r = network_load(manager, &new_networks);
 592         if (r < 0)
 593                 goto failure;
 594
 595         ORDERED_HASHMAP_FOREACH(n, new_networks, i) {
 596                 r = network_get_by_name(manager, n->name, &old);
 597                 if (r < 0)
 598                         continue; /* The .network file is new. */
 599
 600                 if (n->timestamp != old->timestamp)
 601                         continue; /* The .network file is modified. */
 602
 603                 if (!streq(n->filename, old->filename))
 604                         continue;
 605
 606                 r = ordered_hashmap_replace(new_networks, old->name, old);
 607                 if (r < 0)
 608                         goto failure;
 609
 610                 network_ref(old);
 611                 network_unref(n);
 612         }
 613
 614         ordered_hashmap_free_with_destructor(manager->networks, network_unref);
 615         manager->networks = new_networks;
 616
 617         return 0;
 618
 619 failure:
 620         ordered_hashmap_free_with_destructor(new_networks, network_unref);
 621
 622         return r;
 623 }
 624
 625 static Network *network_free(Network *network) {
 626         IPv6ProxyNDPAddress *ipv6_proxy_ndp_address;
 627         RoutePrefix *route_prefix;
 628         RoutingPolicyRule *rule;
 629         AddressLabel *label;
 630         FdbEntry *fdb_entry;
 631         Neighbor *neighbor;
 632         Address *address;
 633         NextHop *nexthop;
 634         Prefix *prefix;
 635         Route *route;
 636
 637         if (!network)
 638                 return NULL;
 639
 640         free(network->filename);
 641
 642         set_free_free(network->match_mac);
 643         set_free_free(network->match_permanent_mac);
 644         strv_free(network->match_path);
 645         strv_free(network->match_driver);
 646         strv_free(network->match_type);
 647         strv_free(network->match_name);
 648         strv_free(network->match_property);
 649         strv_free(network->match_wlan_iftype);
 650         strv_free(network->match_ssid);
 651         set_free_free(network->match_bssid);
 652         condition_free_list(network->conditions);
 653
 654         free(network->description);
 655         free(network->dhcp_vendor_class_identifier);
 656         free(network->dhcp_mudurl);
 657         strv_free(network->dhcp_user_class);
 658         free(network->dhcp_hostname);
 659         set_free(network->dhcp_black_listed_ip);
 660         set_free(network->dhcp_request_options);
 661         set_free(network->dhcp6_request_options);
 662         free(network->mac);
 663         free(network->dhcp6_mudurl);
 664         strv_free(network->dhcp6_user_class);
 665         strv_free(network->dhcp6_vendor_class);
 666
 667         if (network->dhcp_acd)
 668                 sd_ipv4acd_unref(network->dhcp_acd);
 669
 670         strv_free(network->ntp);
 671         free(network->dns);
 672         strv_free(network->sip);
 673         strv_free(network->smtp);
 674         ordered_set_free_free(network->search_domains);
 675         ordered_set_free_free(network->route_domains);
 676         strv_free(network->bind_carrier);
 677
 678         ordered_set_free_free(network->router_search_domains);
 679         free(network->router_dns);
 680         set_free_free(network->ndisc_black_listed_prefix);
 681
 682         free(network->bridge_name);
 683         free(network->bond_name);
 684         free(network->vrf_name);
 685         hashmap_free_free_key(network->stacked_netdev_names);
 686         netdev_unref(network->bridge);
 687         netdev_unref(network->bond);
 688         netdev_unref(network->vrf);
 689         hashmap_free_with_destructor(network->stacked_netdevs, netdev_unref);
 690
 691         while ((route = network->static_routes))
 692                 route_free(route);
 693
 694         while ((nexthop = network->static_nexthops))
 695                 nexthop_free(nexthop);
 696
 697         while ((address = network->static_addresses))
 698                 address_free(address);
 699
 700         while ((fdb_entry = network->static_fdb_entries))
 701                 fdb_entry_free(fdb_entry);
 702
 703         while ((ipv6_proxy_ndp_address = network->ipv6_proxy_ndp_addresses))
 704                 ipv6_proxy_ndp_address_free(ipv6_proxy_ndp_address);
 705
 706         while ((neighbor = network->neighbors))
 707                 neighbor_free(neighbor);
 708
 709         while ((label = network->address_labels))
 710                 address_label_free(label);
 711
 712         while ((prefix = network->static_prefixes))
 713                 prefix_free(prefix);
 714
 715         while ((route_prefix = network->static_route_prefixes))
 716                 route_prefix_free(route_prefix);
 717
 718         while ((rule = network->rules))
 719                 routing_policy_rule_free(rule);
 720
 721         hashmap_free(network->addresses_by_section);
 722         hashmap_free(network->routes_by_section);
 723         hashmap_free(network->nexthops_by_section);
 724         hashmap_free(network->fdb_entries_by_section);
 725         hashmap_free(network->neighbors_by_section);
 726         hashmap_free(network->address_labels_by_section);
 727         hashmap_free(network->prefixes_by_section);
 728         hashmap_free(network->route_prefixes_by_section);
 729         hashmap_free(network->rules_by_section);
 730         ordered_hashmap_free_with_destructor(network->tc_by_section, traffic_control_free);
 731
 732         if (network->manager &&
 733             network->manager->duids_requesting_uuid)
 734                 set_remove(network->manager->duids_requesting_uuid, &network->duid);
 735
 736         free(network->name);
 737
 738         free(network->dhcp_server_timezone);
 739         free(network->dhcp_server_dns);
 740         free(network->dhcp_server_ntp);
 741         free(network->dhcp_server_sip);
 742
 743         set_free_free(network->dnssec_negative_trust_anchors);
 744
 745         free(network->lldp_mud);
 746
 747         ordered_hashmap_free(network->dhcp_client_send_options);
 748         ordered_hashmap_free(network->dhcp_client_send_vendor_options);
 749         ordered_hashmap_free(network->dhcp_server_send_options);
 750         ordered_hashmap_free(network->dhcp_server_send_vendor_options);
 751         ordered_hashmap_free(network->ipv6_tokens);
 752
 753         return mfree(network);
 754 }
 755
 756 DEFINE_TRIVIAL_REF_UNREF_FUNC(Network, network, network_free);
 757
 758 int network_get_by_name(Manager *manager, const char *name, Network **ret) {
 759         Network *network;
 760
 761         assert(manager);
 762         assert(name);
 763         assert(ret);
 764
 765         network = ordered_hashmap_get(manager->networks, name);
 766         if (!network)
 767                 return -ENOENT;
 768
 769         *ret = network;
 770
 771         return 0;
 772 }
 773
 774 int network_get(Manager *manager, unsigned short iftype, sd_device *device,
 775                 const char *ifname, char * const *alternative_names,
 776                 const struct ether_addr *address, const struct ether_addr *permanent_address,
 777                 enum nl80211_iftype wlan_iftype, const char *ssid, const struct ether_addr *bssid,
 778                 Network **ret) {
 779         Network *network;
 780         Iterator i;
 781
 782         assert(manager);
 783         assert(ret);
 784
 785         ORDERED_HASHMAP_FOREACH(network, manager->networks, i)
 786                 if (net_match_config(network->match_mac, network->match_permanent_mac,
 787                                      network->match_path, network->match_driver,
 788                                      network->match_type, network->match_name, network->match_property,
 789                                      network->match_wlan_iftype, network->match_ssid, network->match_bssid,
 790                                      iftype, device, address, permanent_address,
 791                                      ifname, alternative_names, wlan_iftype, ssid, bssid)) {
 792                         if (network->match_name && device) {
 793                                 const char *attr;
 794                                 uint8_t name_assign_type = NET_NAME_UNKNOWN;
 795
 796                                 if (sd_device_get_sysattr_value(device, "name_assign_type", &attr) >= 0)
 797                                         (void) safe_atou8(attr, &name_assign_type);
 798
 799                                 if (name_assign_type == NET_NAME_ENUM)
 800                                         log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
 801                                                     ifname, network->filename);
 802                                 else
 803                                         log_debug("%s: found matching network '%s'", ifname, network->filename);
 804                         } else
 805                                 log_debug("%s: found matching network '%s'", ifname, network->filename);
 806
 807                         *ret = network;
 808                         return 0;
 809                 }
 810
 811         *ret = NULL;
 812
 813         return -ENOENT;
 814 }
 815
 816 int network_apply(Network *network, Link *link) {
 817         assert(network);
 818         assert(link);
 819
 820         link->network = network_ref(network);
 821
 822         if (network->n_dns > 0 ||
 823             !strv_isempty(network->ntp) ||
 824             !ordered_set_isempty(network->search_domains) ||
 825             !ordered_set_isempty(network->route_domains))
 826                 link_dirty(link);
 827
 828         return 0;
 829 }
 830
 831 bool network_has_static_ipv6_configurations(Network *network) {
 832         Address *address;
 833         Route *route;
 834         FdbEntry *fdb;
 835         Neighbor *neighbor;
 836
 837         assert(network);
 838
 839         LIST_FOREACH(addresses, address, network->static_addresses)
 840                 if (address->family == AF_INET6)
 841                         return true;
 842
 843         LIST_FOREACH(routes, route, network->static_routes)
 844                 if (route->family == AF_INET6)
 845                         return true;
 846
 847         LIST_FOREACH(static_fdb_entries, fdb, network->static_fdb_entries)
 848                 if (fdb->family == AF_INET6)
 849                         return true;
 850
 851         LIST_FOREACH(neighbors, neighbor, network->neighbors)
 852                 if (neighbor->family == AF_INET6)
 853                         return true;
 854
 855         if (!LIST_IS_EMPTY(network->address_labels))
 856                 return true;
 857
 858         if (!LIST_IS_EMPTY(network->static_prefixes))
 859                 return true;
 860
 861         return false;
 862 }
 863
 864 int config_parse_stacked_netdev(const char *unit,
 865                 const char *filename,
 866                 unsigned line,
 867                 const char *section,
 868                 unsigned section_line,
 869                 const char *lvalue,
 870                 int ltype,
 871                 const char *rvalue,
 872                 void *data,
 873                 void *userdata) {
 874         _cleanup_free_ char *name = NULL;
 875         NetDevKind kind = ltype;
 876         Hashmap **h = data;
 877         int r;
 878
 879         assert(filename);
 880         assert(lvalue);
 881         assert(rvalue);
 882         assert(data);
 883         assert(IN_SET(kind,
 884                       NETDEV_KIND_VLAN, NETDEV_KIND_MACVLAN, NETDEV_KIND_MACVTAP,
 885                       NETDEV_KIND_IPVLAN, NETDEV_KIND_IPVTAP, NETDEV_KIND_VXLAN,
 886                       NETDEV_KIND_L2TP, NETDEV_KIND_MACSEC, _NETDEV_KIND_TUNNEL,
 887                       NETDEV_KIND_XFRM));
 888
 889         if (!ifname_valid(rvalue)) {
 890                 log_syntax(unit, LOG_ERR, filename, line, 0,
 891                            "Invalid netdev name in %s=, ignoring assignment: %s", lvalue, rvalue);
 892                 return 0;
 893         }
 894
 895         name = strdup(rvalue);
 896         if (!name)
 897                 return log_oom();
 898
 899         r = hashmap_ensure_allocated(h, &string_hash_ops);
 900         if (r < 0)
 901                 return log_oom();
 902
 903         r = hashmap_put(*h, name, INT_TO_PTR(kind));
 904         if (r < 0)
 905                 log_syntax(unit, LOG_ERR, filename, line, r,
 906                            "Cannot add NetDev '%s' to network, ignoring assignment: %m", name);
 907         else if (r == 0)
 908                 log_syntax(unit, LOG_DEBUG, filename, line, r,
 909                            "NetDev '%s' specified twice, ignoring.", name);
 910         else
 911                 name = NULL;
 912
 913         return 0;
 914 }
 915
 916 int config_parse_domains(
 917                 const char *unit,
 918                 const char *filename,
 919                 unsigned line,
 920                 const char *section,
 921                 unsigned section_line,
 922                 const char *lvalue,
 923                 int ltype,
 924                 const char *rvalue,
 925                 void *data,
 926                 void *userdata) {
 927
 928         const char *p;
 929         Network *n = data;
 930         int r;
 931
 932         assert(n);
 933         assert(lvalue);
 934         assert(rvalue);
 935
 936         if (isempty(rvalue)) {
 937                 n->search_domains = ordered_set_free_free(n->search_domains);
 938                 n->route_domains = ordered_set_free_free(n->route_domains);
 939                 return 0;
 940         }
 941
 942         p = rvalue;
 943         for (;;) {
 944                 _cleanup_free_ char *w = NULL, *normalized = NULL;
 945                 const char *domain;
 946                 bool is_route;
 947
 948                 r = extract_first_word(&p, &w, NULL, 0);
 949                 if (r < 0) {
 950                         log_syntax(unit, LOG_ERR, filename, line, r,
 951                                    "Failed to extract search or route domain, ignoring: %s", rvalue);
 952                         break;
 953                 }
 954                 if (r == 0)
 955                         break;
 956
 957                 is_route = w[0] == '~';
 958                 domain = is_route ? w + 1 : w;
 959
 960                 if (dns_name_is_root(domain) || streq(domain, "*")) {
 961                         /* If the root domain appears as is, or the special token "*" is found, we'll
 962                          * consider this as routing domain, unconditionally. */
 963                         is_route = true;
 964                         domain = "."; /* make sure we don't allow empty strings, thus write the root
 965                                        * domain as "." */
 966                 } else {
 967                         r = dns_name_normalize(domain, 0, &normalized);
 968                         if (r < 0) {
 969                                 log_syntax(unit, LOG_ERR, filename, line, r,
 970                                            "'%s' is not a valid domain name, ignoring.", domain);
 971                                 continue;
 972                         }
 973
 974                         domain = normalized;
 975
 976                         if (is_localhost(domain)) {
 977                                 log_syntax(unit, LOG_ERR, filename, line, 0,
 978                                            "'localhost' domain may not be configured as search or route domain, ignoring assignment: %s",
 979                                            domain);
 980                                 continue;
 981                         }
 982                 }
 983
 984                 OrderedSet **set = is_route ? &n->route_domains : &n->search_domains;
 985                 r = ordered_set_ensure_allocated(set, &string_hash_ops);
 986                 if (r < 0)
 987                         return r;
 988
 989                 r = ordered_set_put_strdup(*set, domain);
 990                 if (r < 0)
 991                         return log_oom();
 992         }
 993
 994         return 0;
 995 }
 996
 997 int config_parse_ipv6token(
 998                 const char* unit,
 999                 const char *filename,
1000                 unsigned line,
1001                 const char *section,
1002                 unsigned section_line,
1003                 const char *lvalue,
1004                 int ltype,
1005                 const char *rvalue,
1006                 void *data,
1007                 void *userdata) {
1008
1009         union in_addr_union buffer;
1010         struct in6_addr *token = data;
1011         int r;
1012
1013         assert(filename);
1014         assert(lvalue);
1015         assert(rvalue);
1016         assert(token);
1017
1018         r = in_addr_from_string(AF_INET6, rvalue, &buffer);
1019         if (r < 0) {
1020                 log_syntax(unit, LOG_ERR, filename, line, r,
1021                            "Failed to parse IPv6 token, ignoring: %s", rvalue);
1022                 return 0;
1023         }
1024
1025         if (in_addr_is_null(AF_INET6, &buffer)) {
1026                 log_syntax(unit, LOG_ERR, filename, line, 0,
1027                            "IPv6 token cannot be the ANY address, ignoring: %s", rvalue);
1028                 return 0;
1029         }
1030
1031         if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
1032                 log_syntax(unit, LOG_ERR, filename, line, 0,
1033                            "IPv6 token cannot be longer than 64 bits, ignoring: %s", rvalue);
1034                 return 0;
1035         }
1036
1037         *token = buffer.in6;
1038
1039         return 0;
1040 }
1041
1042 static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
1043         [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
1044         [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
1045         [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
1046 };
1047
1048 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(ipv6_privacy_extensions, IPv6PrivacyExtensions,
1049                                         IPV6_PRIVACY_EXTENSIONS_YES);
1050
1051 int config_parse_ipv6_privacy_extensions(
1052                 const char* unit,
1053                 const char *filename,
1054                 unsigned line,
1055                 const char *section,
1056                 unsigned section_line,
1057                 const char *lvalue,
1058                 int ltype,
1059                 const char *rvalue,
1060                 void *data,
1061                 void *userdata) {
1062
1063         IPv6PrivacyExtensions s, *ipv6_privacy_extensions = data;
1064
1065         assert(filename);
1066         assert(lvalue);
1067         assert(rvalue);
1068         assert(ipv6_privacy_extensions);
1069
1070         s = ipv6_privacy_extensions_from_string(rvalue);
1071         if (s < 0) {
1072                 if (streq(rvalue, "kernel"))
1073                         s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
1074                 else {
1075                         log_syntax(unit, LOG_ERR, filename, line, 0,
1076                                    "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
1077                         return 0;
1078                 }
1079         }
1080
1081         *ipv6_privacy_extensions = s;
1082
1083         return 0;
1084 }
1085
1086 int config_parse_hostname(
1087                 const char *unit,
1088                 const char *filename,
1089                 unsigned line,
1090                 const char *section,
1091                 unsigned section_line,
1092                 const char *lvalue,
1093                 int ltype,
1094                 const char *rvalue,
1095                 void *data,
1096                 void *userdata) {
1097
1098         _cleanup_free_ char *hn = NULL;
1099         char **hostname = data;
1100         int r;
1101
1102         assert(filename);
1103         assert(lvalue);
1104         assert(rvalue);
1105
1106         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
1107         if (r < 0)
1108                 return r;
1109
1110         if (!hostname_is_valid(hn, false)) {
1111                 log_syntax(unit, LOG_ERR, filename, line, 0,
1112                            "Hostname is not valid, ignoring assignment: %s", rvalue);
1113                 return 0;
1114         }
1115
1116         r = dns_name_is_valid(hn);
1117         if (r < 0) {
1118                 log_syntax(unit, LOG_ERR, filename, line, r,
1119                            "Failed to check validity of hostname '%s', ignoring assignment: %m", rvalue);
1120                 return 0;
1121         }
1122         if (r == 0) {
1123                 log_syntax(unit, LOG_ERR, filename, line, 0,
1124                            "Hostname is not a valid DNS domain name, ignoring assignment: %s", rvalue);
1125                 return 0;
1126         }
1127
1128         return free_and_replace(*hostname, hn);
1129 }
1130
1131 int config_parse_timezone(
1132                 const char *unit,
1133                 const char *filename,
1134                 unsigned line,
1135                 const char *section,
1136                 unsigned section_line,
1137                 const char *lvalue,
1138                 int ltype,
1139                 const char *rvalue,
1140                 void *data,
1141                 void *userdata) {
1142
1143         _cleanup_free_ char *tz = NULL;
1144         char **datap = data;
1145         int r;
1146
1147         assert(filename);
1148         assert(lvalue);
1149         assert(rvalue);
1150
1151         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
1152         if (r < 0)
1153                 return r;
1154
1155         if (!timezone_is_valid(tz, LOG_ERR)) {
1156                 log_syntax(unit, LOG_ERR, filename, line, 0,
1157                            "Timezone is not valid, ignoring assignment: %s", rvalue);
1158                 return 0;
1159         }
1160
1161         return free_and_replace(*datap, tz);
1162 }
1163
1164 int config_parse_dns(
1165                 const char *unit,
1166                 const char *filename,
1167                 unsigned line,
1168                 const char *section,
1169                 unsigned section_line,
1170                 const char *lvalue,
1171                 int ltype,
1172                 const char *rvalue,
1173                 void *data,
1174                 void *userdata) {
1175
1176         Network *n = userdata;
1177         int r;
1178
1179         assert(filename);
1180         assert(lvalue);
1181         assert(rvalue);
1182
1183         for (;;) {
1184                 _cleanup_free_ char *w = NULL;
1185                 union in_addr_union a;
1186                 struct in_addr_data *m;
1187                 int family;
1188
1189                 r = extract_first_word(&rvalue, &w, NULL, 0);
1190                 if (r == -ENOMEM)
1191                         return log_oom();
1192                 if (r < 0) {
1193                         log_syntax(unit, LOG_ERR, filename, line, r,
1194                                    "Invalid syntax, ignoring: %s", rvalue);
1195                         break;
1196                 }
1197                 if (r == 0)
1198                         break;
1199
1200                 r = in_addr_from_string_auto(w, &family, &a);
1201                 if (r < 0) {
1202                         log_syntax(unit, LOG_ERR, filename, line, r,
1203                                    "Failed to parse dns server address, ignoring: %s", w);
1204                         continue;
1205                 }
1206
1207                 m = reallocarray(n->dns, n->n_dns + 1, sizeof(struct in_addr_data));
1208                 if (!m)
1209                         return log_oom();
1210
1211                 m[n->n_dns++] = (struct in_addr_data) {
1212                         .family = family,
1213                         .address = a,
1214                 };
1215
1216                 n->dns = m;
1217         }
1218
1219         return 0;
1220 }
1221
1222 int config_parse_dnssec_negative_trust_anchors(
1223                 const char *unit,
1224                 const char *filename,
1225                 unsigned line,
1226                 const char *section,
1227                 unsigned section_line,
1228                 const char *lvalue,
1229                 int ltype,
1230                 const char *rvalue,
1231                 void *data,
1232                 void *userdata) {
1233
1234         const char *p = rvalue;
1235         Network *n = data;
1236         int r;
1237
1238         assert(n);
1239         assert(lvalue);
1240         assert(rvalue);
1241
1242         if (isempty(rvalue)) {
1243                 n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
1244                 return 0;
1245         }
1246
1247         for (;;) {
1248                 _cleanup_free_ char *w = NULL;
1249
1250                 r = extract_first_word(&p, &w, NULL, 0);
1251                 if (r < 0) {
1252                         log_syntax(unit, LOG_ERR, filename, line, r,
1253                                    "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
1254                         break;
1255                 }
1256                 if (r == 0)
1257                         break;
1258
1259                 r = dns_name_is_valid(w);
1260                 if (r <= 0) {
1261                         log_syntax(unit, LOG_ERR, filename, line, r,
1262                                    "%s is not a valid domain name, ignoring.", w);
1263                         continue;
1264                 }
1265
1266                 r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
1267                 if (r < 0)
1268                         return log_oom();
1269
1270                 r = set_put(n->dnssec_negative_trust_anchors, w);
1271                 if (r < 0)
1272                         return log_oom();
1273                 if (r > 0)
1274                         w = NULL;
1275         }
1276
1277         return 0;
1278 }
1279
1280 int config_parse_ntp(
1281                 const char *unit,
1282                 const char *filename,
1283                 unsigned line,
1284                 const char *section,
1285                 unsigned section_line,
1286                 const char *lvalue,
1287                 int ltype,
1288                 const char *rvalue,
1289                 void *data,
1290                 void *userdata) {
1291
1292         char ***l = data;
1293         int r;
1294
1295         assert(l);
1296         assert(lvalue);
1297         assert(rvalue);
1298
1299         if (isempty(rvalue)) {
1300                 *l = strv_free(*l);
1301                 return 0;
1302         }
1303
1304         for (;;) {
1305                 _cleanup_free_ char *w = NULL;
1306
1307                 r = extract_first_word(&rvalue, &w, NULL, 0);
1308                 if (r == -ENOMEM)
1309                         return log_oom();
1310                 if (r < 0) {
1311                         log_syntax(unit, LOG_ERR, filename, line, r,
1312                                    "Failed to extract NTP server name, ignoring: %s", rvalue);
1313                         break;
1314                 }
1315                 if (r == 0)
1316                         break;
1317
1318                 r = dns_name_is_valid_or_address(w);
1319                 if (r <= 0) {
1320                         log_syntax(unit, LOG_ERR, filename, line, r,
1321                                    "%s is not a valid domain name or IP address, ignoring.", w);
1322                         continue;
1323                 }
1324
1325                 if (strv_length(*l) > MAX_NTP_SERVERS) {
1326                         log_syntax(unit, LOG_WARNING, filename, line, 0,
1327                                    "More than %u NTP servers specified, ignoring \"%s\" and any subsequent entries.",
1328                                    MAX_NTP_SERVERS, w);
1329                         break;
1330                 }
1331
1332                 r = strv_consume(l, TAKE_PTR(w));
1333                 if (r < 0)
1334                         return log_oom();
1335         }
1336
1337         return 0;
1338 }
1339
1340 int config_parse_required_for_online(
1341                 const char *unit,
1342                 const char *filename,
1343                 unsigned line,
1344                 const char *section,
1345                 unsigned section_line,
1346                 const char *lvalue,
1347                 int ltype,
1348                 const char *rvalue,
1349                 void *data,
1350                 void *userdata) {
1351
1352         Network *network = data;
1353         LinkOperationalStateRange range;
1354         bool required = true;
1355         int r;
1356
1357         if (isempty(rvalue)) {
1358                 network->required_for_online = true;
1359                 network->required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT;
1360                 return 0;
1361         }
1362
1363         r = parse_operational_state_range(rvalue, &range);
1364         if (r < 0) {
1365                 r = parse_boolean(rvalue);
1366                 if (r < 0) {
1367                         log_syntax(unit, LOG_ERR, filename, line, r,
1368                                    "Failed to parse %s= setting, ignoring assignment: %s",
1369                                    lvalue, rvalue);
1370                         return 0;
1371                 }
1372
1373                 required = r;
1374                 range = LINK_OPERSTATE_RANGE_DEFAULT;
1375         }
1376
1377         network->required_for_online = required;
1378         network->required_operstate_for_online = range;
1379
1380         return 0;
1381 }
1382
1383 DEFINE_CONFIG_PARSE_ENUM(config_parse_keep_configuration, keep_configuration, KeepConfiguration,
1384                          "Failed to parse KeepConfiguration= setting");
1385
1386 static const char* const keep_configuration_table[_KEEP_CONFIGURATION_MAX] = {
1387         [KEEP_CONFIGURATION_NO]           = "no",
1388         [KEEP_CONFIGURATION_DHCP_ON_STOP] = "dhcp-on-stop",
1389         [KEEP_CONFIGURATION_DHCP]         = "dhcp",
1390         [KEEP_CONFIGURATION_STATIC]       = "static",
1391         [KEEP_CONFIGURATION_YES]          = "yes",
1392 };
1393
1394 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(keep_configuration, KeepConfiguration, KEEP_CONFIGURATION_YES);