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_route_metric = DHCP_ROUTE_METRIC,
 413                 .dhcp6_use_ntp = true,
 414                 .dhcp6_use_dns = true,
 415
 416                 .dhcp6_pd_assign_prefix = true,
 417
 418                 .dhcp_server_emit_dns = true,
 419                 .dhcp_server_emit_ntp = true,
 420                 .dhcp_server_emit_sip = true,
 421                 .dhcp_server_emit_router = true,
 422                 .dhcp_server_emit_timezone = true,
 423
 424                 .router_prefix_subnet_id = -1,
 425                 .router_emit_dns = true,
 426                 .router_emit_domains = true,
 427
 428                 .use_bpdu = -1,
 429                 .hairpin = -1,
 430                 .fast_leave = -1,
 431                 .allow_port_to_be_root = -1,
 432                 .unicast_flood = -1,
 433                 .multicast_flood = -1,
 434                 .multicast_to_unicast = -1,
 435                 .neighbor_suppression = -1,
 436                 .learning = -1,
 437                 .bridge_proxy_arp = -1,
 438                 .bridge_proxy_arp_wifi = -1,
 439                 .priority = LINK_BRIDGE_PORT_PRIORITY_INVALID,
 440                 .multicast_router = _MULTICAST_ROUTER_INVALID,
 441
 442                 .lldp_mode = LLDP_MODE_ROUTERS_ONLY,
 443
 444                 .dns_default_route = -1,
 445                 .llmnr = RESOLVE_SUPPORT_YES,
 446                 .mdns = RESOLVE_SUPPORT_NO,
 447                 .dnssec_mode = _DNSSEC_MODE_INVALID,
 448                 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
 449
 450                 /* If LinkLocalAddressing= is not set, then set to ADDRESS_FAMILY_IPV6 later. */
 451                 .link_local = _ADDRESS_FAMILY_INVALID,
 452
 453                 .ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO,
 454                 .ipv6_accept_ra = -1,
 455                 .ipv6_dad_transmits = -1,
 456                 .ipv6_hop_limit = -1,
 457                 .ipv6_proxy_ndp = -1,
 458                 .duid.type = _DUID_TYPE_INVALID,
 459                 .proxy_arp = -1,
 460                 .arp = -1,
 461                 .multicast = -1,
 462                 .allmulticast = -1,
 463                 .ipv6_accept_ra_use_dns = true,
 464                 .ipv6_accept_ra_use_autonomous_prefix = true,
 465                 .ipv6_accept_ra_use_onlink_prefix = true,
 466                 .ipv6_accept_ra_route_table = RT_TABLE_MAIN,
 467                 .ipv6_accept_ra_route_table_set = false,
 468                 .ipv6_accept_ra_start_dhcp6_client = true,
 469
 470                 .configure_without_carrier = false,
 471                 .ignore_carrier_loss = -1,
 472                 .keep_configuration = _KEEP_CONFIGURATION_INVALID,
 473                 .ipv6_address_gen_mode = _LINK_IPV6_ADDRESS_GEN_MODE_INVALID,
 474                 .can_triple_sampling = -1,
 475                 .can_termination = -1,
 476                 .ip_service_type = -1,
 477         };
 478
 479         r = config_parse_many(
 480                         filename, NETWORK_DIRS, dropin_dirname,
 481                         "Match\0"
 482                         "Link\0"
 483                         "Network\0"
 484                         "Address\0"
 485                         "Neighbor\0"
 486                         "IPv6AddressLabel\0"
 487                         "RoutingPolicyRule\0"
 488                         "Route\0"
 489                         "NextHop\0"
 490                         "DHCP\0" /* compat */
 491                         "DHCPv4\0"
 492                         "DHCPv6\0"
 493                         "DHCPServer\0"
 494                         "IPv6AcceptRA\0"
 495                         "IPv6NDPProxyAddress\0"
 496                         "Bridge\0"
 497                         "BridgeFDB\0"
 498                         "BridgeVLAN\0"
 499                         "IPv6PrefixDelegation\0"
 500                         "IPv6Prefix\0"
 501                         "IPv6RoutePrefix\0"
 502                         "LLDP\0"
 503                         "TrafficControlQueueingDiscipline\0"
 504                         "CAN\0"
 505                         "QDisc\0"
 506                         "BFIFO\0"
 507                         "CAKE\0"
 508                         "ControlledDelay\0"
 509                         "DeficitRoundRobinScheduler\0"
 510                         "DeficitRoundRobinSchedulerClass\0"
 511                         "FairQueueing\0"
 512                         "FairQueueingControlledDelay\0"
 513                         "GenericRandomEarlyDetection\0"
 514                         "HeavyHitterFilter\0"
 515                         "HierarchyTokenBucket\0"
 516                         "HierarchyTokenBucketClass\0"
 517                         "NetworkEmulator\0"
 518                         "PFIFO\0"
 519                         "PFIFOFast\0"
 520                         "PFIFOHeadDrop\0"
 521                         "PIE\0"
 522                         "QuickFairQueueing\0"
 523                         "StochasticFairBlue\0"
 524                         "StochasticFairnessQueueing\0"
 525                         "TokenBucketFilter\0"
 526                         "TrivialLinkEqualizer\0",
 527                         config_item_perf_lookup, network_network_gperf_lookup,
 528                         CONFIG_PARSE_WARN,
 529                         network,
 530                         &network->timestamp);
 531         if (r < 0)
 532                 return r;
 533
 534         network_apply_anonymize_if_set(network);
 535
 536         r = network_add_ipv4ll_route(network);
 537         if (r < 0)
 538                 log_warning_errno(r, "%s: Failed to add IPv4LL route, ignoring: %m", network->filename);
 539
 540         r = network_add_default_route_on_device(network);
 541         if (r < 0)
 542                 log_warning_errno(r, "%s: Failed to add default route on device, ignoring: %m",
 543                                   network->filename);
 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         free(network->dhcp_server_pop3);
 743         free(network->dhcp_server_smtp);
 744         free(network->dhcp_server_lpr);
 745
 746         set_free_free(network->dnssec_negative_trust_anchors);
 747
 748         free(network->lldp_mud);
 749
 750         ordered_hashmap_free(network->dhcp_client_send_options);
 751         ordered_hashmap_free(network->dhcp_client_send_vendor_options);
 752         ordered_hashmap_free(network->dhcp_server_send_options);
 753         ordered_hashmap_free(network->dhcp_server_send_vendor_options);
 754         ordered_hashmap_free(network->ipv6_tokens);
 755         ordered_hashmap_free(network->dhcp6_client_send_options);
 756         ordered_hashmap_free(network->dhcp6_client_send_vendor_options);
 757
 758         return mfree(network);
 759 }
 760
 761 DEFINE_TRIVIAL_REF_UNREF_FUNC(Network, network, network_free);
 762
 763 int network_get_by_name(Manager *manager, const char *name, Network **ret) {
 764         Network *network;
 765
 766         assert(manager);
 767         assert(name);
 768         assert(ret);
 769
 770         network = ordered_hashmap_get(manager->networks, name);
 771         if (!network)
 772                 return -ENOENT;
 773
 774         *ret = network;
 775
 776         return 0;
 777 }
 778
 779 int network_get(Manager *manager, unsigned short iftype, sd_device *device,
 780                 const char *ifname, char * const *alternative_names,
 781                 const struct ether_addr *address, const struct ether_addr *permanent_address,
 782                 enum nl80211_iftype wlan_iftype, const char *ssid, const struct ether_addr *bssid,
 783                 Network **ret) {
 784         Network *network;
 785         Iterator i;
 786
 787         assert(manager);
 788         assert(ret);
 789
 790         ORDERED_HASHMAP_FOREACH(network, manager->networks, i)
 791                 if (net_match_config(network->match_mac, network->match_permanent_mac,
 792                                      network->match_path, network->match_driver,
 793                                      network->match_type, network->match_name, network->match_property,
 794                                      network->match_wlan_iftype, network->match_ssid, network->match_bssid,
 795                                      iftype, device, address, permanent_address,
 796                                      ifname, alternative_names, wlan_iftype, ssid, bssid)) {
 797                         if (network->match_name && device) {
 798                                 const char *attr;
 799                                 uint8_t name_assign_type = NET_NAME_UNKNOWN;
 800
 801                                 if (sd_device_get_sysattr_value(device, "name_assign_type", &attr) >= 0)
 802                                         (void) safe_atou8(attr, &name_assign_type);
 803
 804                                 if (name_assign_type == NET_NAME_ENUM)
 805                                         log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
 806                                                     ifname, network->filename);
 807                                 else
 808                                         log_debug("%s: found matching network '%s'", ifname, network->filename);
 809                         } else
 810                                 log_debug("%s: found matching network '%s'", ifname, network->filename);
 811
 812                         *ret = network;
 813                         return 0;
 814                 }
 815
 816         *ret = NULL;
 817
 818         return -ENOENT;
 819 }
 820
 821 int network_apply(Network *network, Link *link) {
 822         assert(network);
 823         assert(link);
 824
 825         link->network = network_ref(network);
 826
 827         if (network->n_dns > 0 ||
 828             !strv_isempty(network->ntp) ||
 829             !ordered_set_isempty(network->search_domains) ||
 830             !ordered_set_isempty(network->route_domains))
 831                 link_dirty(link);
 832
 833         return 0;
 834 }
 835
 836 bool network_has_static_ipv6_configurations(Network *network) {
 837         Address *address;
 838         Route *route;
 839         FdbEntry *fdb;
 840         Neighbor *neighbor;
 841
 842         assert(network);
 843
 844         LIST_FOREACH(addresses, address, network->static_addresses)
 845                 if (address->family == AF_INET6)
 846                         return true;
 847
 848         LIST_FOREACH(routes, route, network->static_routes)
 849                 if (route->family == AF_INET6)
 850                         return true;
 851
 852         LIST_FOREACH(static_fdb_entries, fdb, network->static_fdb_entries)
 853                 if (fdb->family == AF_INET6)
 854                         return true;
 855
 856         LIST_FOREACH(neighbors, neighbor, network->neighbors)
 857                 if (neighbor->family == AF_INET6)
 858                         return true;
 859
 860         if (!LIST_IS_EMPTY(network->address_labels))
 861                 return true;
 862
 863         if (!LIST_IS_EMPTY(network->static_prefixes))
 864                 return true;
 865
 866         return false;
 867 }
 868
 869 int config_parse_stacked_netdev(const char *unit,
 870                 const char *filename,
 871                 unsigned line,
 872                 const char *section,
 873                 unsigned section_line,
 874                 const char *lvalue,
 875                 int ltype,
 876                 const char *rvalue,
 877                 void *data,
 878                 void *userdata) {
 879         _cleanup_free_ char *name = NULL;
 880         NetDevKind kind = ltype;
 881         Hashmap **h = data;
 882         int r;
 883
 884         assert(filename);
 885         assert(lvalue);
 886         assert(rvalue);
 887         assert(data);
 888         assert(IN_SET(kind,
 889                       NETDEV_KIND_VLAN, NETDEV_KIND_MACVLAN, NETDEV_KIND_MACVTAP,
 890                       NETDEV_KIND_IPVLAN, NETDEV_KIND_IPVTAP, NETDEV_KIND_VXLAN,
 891                       NETDEV_KIND_L2TP, NETDEV_KIND_MACSEC, _NETDEV_KIND_TUNNEL,
 892                       NETDEV_KIND_XFRM));
 893
 894         if (!ifname_valid(rvalue)) {
 895                 log_syntax(unit, LOG_ERR, filename, line, 0,
 896                            "Invalid netdev name in %s=, ignoring assignment: %s", lvalue, rvalue);
 897                 return 0;
 898         }
 899
 900         name = strdup(rvalue);
 901         if (!name)
 902                 return log_oom();
 903
 904         r = hashmap_ensure_allocated(h, &string_hash_ops);
 905         if (r < 0)
 906                 return log_oom();
 907
 908         r = hashmap_put(*h, name, INT_TO_PTR(kind));
 909         if (r < 0)
 910                 log_syntax(unit, LOG_ERR, filename, line, r,
 911                            "Cannot add NetDev '%s' to network, ignoring assignment: %m", name);
 912         else if (r == 0)
 913                 log_syntax(unit, LOG_DEBUG, filename, line, r,
 914                            "NetDev '%s' specified twice, ignoring.", name);
 915         else
 916                 name = NULL;
 917
 918         return 0;
 919 }
 920
 921 int config_parse_domains(
 922                 const char *unit,
 923                 const char *filename,
 924                 unsigned line,
 925                 const char *section,
 926                 unsigned section_line,
 927                 const char *lvalue,
 928                 int ltype,
 929                 const char *rvalue,
 930                 void *data,
 931                 void *userdata) {
 932
 933         const char *p;
 934         Network *n = data;
 935         int r;
 936
 937         assert(n);
 938         assert(lvalue);
 939         assert(rvalue);
 940
 941         if (isempty(rvalue)) {
 942                 n->search_domains = ordered_set_free_free(n->search_domains);
 943                 n->route_domains = ordered_set_free_free(n->route_domains);
 944                 return 0;
 945         }
 946
 947         p = rvalue;
 948         for (;;) {
 949                 _cleanup_free_ char *w = NULL, *normalized = NULL;
 950                 const char *domain;
 951                 bool is_route;
 952
 953                 r = extract_first_word(&p, &w, NULL, 0);
 954                 if (r < 0) {
 955                         log_syntax(unit, LOG_ERR, filename, line, r,
 956                                    "Failed to extract search or route domain, ignoring: %s", rvalue);
 957                         break;
 958                 }
 959                 if (r == 0)
 960                         break;
 961
 962                 is_route = w[0] == '~';
 963                 domain = is_route ? w + 1 : w;
 964
 965                 if (dns_name_is_root(domain) || streq(domain, "*")) {
 966                         /* If the root domain appears as is, or the special token "*" is found, we'll
 967                          * consider this as routing domain, unconditionally. */
 968                         is_route = true;
 969                         domain = "."; /* make sure we don't allow empty strings, thus write the root
 970                                        * domain as "." */
 971                 } else {
 972                         r = dns_name_normalize(domain, 0, &normalized);
 973                         if (r < 0) {
 974                                 log_syntax(unit, LOG_ERR, filename, line, r,
 975                                            "'%s' is not a valid domain name, ignoring.", domain);
 976                                 continue;
 977                         }
 978
 979                         domain = normalized;
 980
 981                         if (is_localhost(domain)) {
 982                                 log_syntax(unit, LOG_ERR, filename, line, 0,
 983                                            "'localhost' domain may not be configured as search or route domain, ignoring assignment: %s",
 984                                            domain);
 985                                 continue;
 986                         }
 987                 }
 988
 989                 OrderedSet **set = is_route ? &n->route_domains : &n->search_domains;
 990                 r = ordered_set_ensure_allocated(set, &string_hash_ops);
 991                 if (r < 0)
 992                         return r;
 993
 994                 r = ordered_set_put_strdup(*set, domain);
 995                 if (r < 0)
 996                         return log_oom();
 997         }
 998
 999         return 0;
1000 }
1001
1002 int config_parse_ipv6token(
1003                 const char* unit,
1004                 const char *filename,
1005                 unsigned line,
1006                 const char *section,
1007                 unsigned section_line,
1008                 const char *lvalue,
1009                 int ltype,
1010                 const char *rvalue,
1011                 void *data,
1012                 void *userdata) {
1013
1014         union in_addr_union buffer;
1015         struct in6_addr *token = data;
1016         int r;
1017
1018         assert(filename);
1019         assert(lvalue);
1020         assert(rvalue);
1021         assert(token);
1022
1023         r = in_addr_from_string(AF_INET6, rvalue, &buffer);
1024         if (r < 0) {
1025                 log_syntax(unit, LOG_ERR, filename, line, r,
1026                            "Failed to parse IPv6 token, ignoring: %s", rvalue);
1027                 return 0;
1028         }
1029
1030         if (in_addr_is_null(AF_INET6, &buffer)) {
1031                 log_syntax(unit, LOG_ERR, filename, line, 0,
1032                            "IPv6 token cannot be the ANY address, ignoring: %s", rvalue);
1033                 return 0;
1034         }
1035
1036         if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
1037                 log_syntax(unit, LOG_ERR, filename, line, 0,
1038                            "IPv6 token cannot be longer than 64 bits, ignoring: %s", rvalue);
1039                 return 0;
1040         }
1041
1042         *token = buffer.in6;
1043
1044         return 0;
1045 }
1046
1047 static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
1048         [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
1049         [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
1050         [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
1051 };
1052
1053 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(ipv6_privacy_extensions, IPv6PrivacyExtensions,
1054                                         IPV6_PRIVACY_EXTENSIONS_YES);
1055
1056 int config_parse_ipv6_privacy_extensions(
1057                 const char* unit,
1058                 const char *filename,
1059                 unsigned line,
1060                 const char *section,
1061                 unsigned section_line,
1062                 const char *lvalue,
1063                 int ltype,
1064                 const char *rvalue,
1065                 void *data,
1066                 void *userdata) {
1067
1068         IPv6PrivacyExtensions s, *ipv6_privacy_extensions = data;
1069
1070         assert(filename);
1071         assert(lvalue);
1072         assert(rvalue);
1073         assert(ipv6_privacy_extensions);
1074
1075         s = ipv6_privacy_extensions_from_string(rvalue);
1076         if (s < 0) {
1077                 if (streq(rvalue, "kernel"))
1078                         s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
1079                 else {
1080                         log_syntax(unit, LOG_ERR, filename, line, 0,
1081                                    "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
1082                         return 0;
1083                 }
1084         }
1085
1086         *ipv6_privacy_extensions = s;
1087
1088         return 0;
1089 }
1090
1091 int config_parse_hostname(
1092                 const char *unit,
1093                 const char *filename,
1094                 unsigned line,
1095                 const char *section,
1096                 unsigned section_line,
1097                 const char *lvalue,
1098                 int ltype,
1099                 const char *rvalue,
1100                 void *data,
1101                 void *userdata) {
1102
1103         _cleanup_free_ char *hn = NULL;
1104         char **hostname = data;
1105         int r;
1106
1107         assert(filename);
1108         assert(lvalue);
1109         assert(rvalue);
1110
1111         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
1112         if (r < 0)
1113                 return r;
1114
1115         if (!hostname_is_valid(hn, false)) {
1116                 log_syntax(unit, LOG_ERR, filename, line, 0,
1117                            "Hostname is not valid, ignoring assignment: %s", rvalue);
1118                 return 0;
1119         }
1120
1121         r = dns_name_is_valid(hn);
1122         if (r < 0) {
1123                 log_syntax(unit, LOG_ERR, filename, line, r,
1124                            "Failed to check validity of hostname '%s', ignoring assignment: %m", rvalue);
1125                 return 0;
1126         }
1127         if (r == 0) {
1128                 log_syntax(unit, LOG_ERR, filename, line, 0,
1129                            "Hostname is not a valid DNS domain name, ignoring assignment: %s", rvalue);
1130                 return 0;
1131         }
1132
1133         return free_and_replace(*hostname, hn);
1134 }
1135
1136 int config_parse_timezone(
1137                 const char *unit,
1138                 const char *filename,
1139                 unsigned line,
1140                 const char *section,
1141                 unsigned section_line,
1142                 const char *lvalue,
1143                 int ltype,
1144                 const char *rvalue,
1145                 void *data,
1146                 void *userdata) {
1147
1148         _cleanup_free_ char *tz = NULL;
1149         char **datap = data;
1150         int r;
1151
1152         assert(filename);
1153         assert(lvalue);
1154         assert(rvalue);
1155
1156         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
1157         if (r < 0)
1158                 return r;
1159
1160         if (!timezone_is_valid(tz, LOG_ERR)) {
1161                 log_syntax(unit, LOG_ERR, filename, line, 0,
1162                            "Timezone is not valid, ignoring assignment: %s", rvalue);
1163                 return 0;
1164         }
1165
1166         return free_and_replace(*datap, tz);
1167 }
1168
1169 int config_parse_dns(
1170                 const char *unit,
1171                 const char *filename,
1172                 unsigned line,
1173                 const char *section,
1174                 unsigned section_line,
1175                 const char *lvalue,
1176                 int ltype,
1177                 const char *rvalue,
1178                 void *data,
1179                 void *userdata) {
1180
1181         Network *n = userdata;
1182         int r;
1183
1184         assert(filename);
1185         assert(lvalue);
1186         assert(rvalue);
1187
1188         for (;;) {
1189                 _cleanup_free_ char *w = NULL;
1190                 union in_addr_union a;
1191                 struct in_addr_data *m;
1192                 int family;
1193
1194                 r = extract_first_word(&rvalue, &w, NULL, 0);
1195                 if (r == -ENOMEM)
1196                         return log_oom();
1197                 if (r < 0) {
1198                         log_syntax(unit, LOG_ERR, filename, line, r,
1199                                    "Invalid syntax, ignoring: %s", rvalue);
1200                         break;
1201                 }
1202                 if (r == 0)
1203                         break;
1204
1205                 r = in_addr_from_string_auto(w, &family, &a);
1206                 if (r < 0) {
1207                         log_syntax(unit, LOG_ERR, filename, line, r,
1208                                    "Failed to parse dns server address, ignoring: %s", w);
1209                         continue;
1210                 }
1211
1212                 m = reallocarray(n->dns, n->n_dns + 1, sizeof(struct in_addr_data));
1213                 if (!m)
1214                         return log_oom();
1215
1216                 m[n->n_dns++] = (struct in_addr_data) {
1217                         .family = family,
1218                         .address = a,
1219                 };
1220
1221                 n->dns = m;
1222         }
1223
1224         return 0;
1225 }
1226
1227 int config_parse_dnssec_negative_trust_anchors(
1228                 const char *unit,
1229                 const char *filename,
1230                 unsigned line,
1231                 const char *section,
1232                 unsigned section_line,
1233                 const char *lvalue,
1234                 int ltype,
1235                 const char *rvalue,
1236                 void *data,
1237                 void *userdata) {
1238
1239         const char *p = rvalue;
1240         Network *n = data;
1241         int r;
1242
1243         assert(n);
1244         assert(lvalue);
1245         assert(rvalue);
1246
1247         if (isempty(rvalue)) {
1248                 n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
1249                 return 0;
1250         }
1251
1252         for (;;) {
1253                 _cleanup_free_ char *w = NULL;
1254
1255                 r = extract_first_word(&p, &w, NULL, 0);
1256                 if (r < 0) {
1257                         log_syntax(unit, LOG_ERR, filename, line, r,
1258                                    "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
1259                         break;
1260                 }
1261                 if (r == 0)
1262                         break;
1263
1264                 r = dns_name_is_valid(w);
1265                 if (r <= 0) {
1266                         log_syntax(unit, LOG_ERR, filename, line, r,
1267                                    "%s is not a valid domain name, ignoring.", w);
1268                         continue;
1269                 }
1270
1271                 r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
1272                 if (r < 0)
1273                         return log_oom();
1274
1275                 r = set_put(n->dnssec_negative_trust_anchors, w);
1276                 if (r < 0)
1277                         return log_oom();
1278                 if (r > 0)
1279                         w = NULL;
1280         }
1281
1282         return 0;
1283 }
1284
1285 int config_parse_ntp(
1286                 const char *unit,
1287                 const char *filename,
1288                 unsigned line,
1289                 const char *section,
1290                 unsigned section_line,
1291                 const char *lvalue,
1292                 int ltype,
1293                 const char *rvalue,
1294                 void *data,
1295                 void *userdata) {
1296
1297         char ***l = data;
1298         int r;
1299
1300         assert(l);
1301         assert(lvalue);
1302         assert(rvalue);
1303
1304         if (isempty(rvalue)) {
1305                 *l = strv_free(*l);
1306                 return 0;
1307         }
1308
1309         for (;;) {
1310                 _cleanup_free_ char *w = NULL;
1311
1312                 r = extract_first_word(&rvalue, &w, NULL, 0);
1313                 if (r == -ENOMEM)
1314                         return log_oom();
1315                 if (r < 0) {
1316                         log_syntax(unit, LOG_ERR, filename, line, r,
1317                                    "Failed to extract NTP server name, ignoring: %s", rvalue);
1318                         break;
1319                 }
1320                 if (r == 0)
1321                         break;
1322
1323                 r = dns_name_is_valid_or_address(w);
1324                 if (r <= 0) {
1325                         log_syntax(unit, LOG_ERR, filename, line, r,
1326                                    "%s is not a valid domain name or IP address, ignoring.", w);
1327                         continue;
1328                 }
1329
1330                 if (strv_length(*l) > MAX_NTP_SERVERS) {
1331                         log_syntax(unit, LOG_WARNING, filename, line, 0,
1332                                    "More than %u NTP servers specified, ignoring \"%s\" and any subsequent entries.",
1333                                    MAX_NTP_SERVERS, w);
1334                         break;
1335                 }
1336
1337                 r = strv_consume(l, TAKE_PTR(w));
1338                 if (r < 0)
1339                         return log_oom();
1340         }
1341
1342         return 0;
1343 }
1344
1345 int config_parse_required_for_online(
1346                 const char *unit,
1347                 const char *filename,
1348                 unsigned line,
1349                 const char *section,
1350                 unsigned section_line,
1351                 const char *lvalue,
1352                 int ltype,
1353                 const char *rvalue,
1354                 void *data,
1355                 void *userdata) {
1356
1357         Network *network = data;
1358         LinkOperationalStateRange range;
1359         bool required = true;
1360         int r;
1361
1362         if (isempty(rvalue)) {
1363                 network->required_for_online = true;
1364                 network->required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT;
1365                 return 0;
1366         }
1367
1368         r = parse_operational_state_range(rvalue, &range);
1369         if (r < 0) {
1370                 r = parse_boolean(rvalue);
1371                 if (r < 0) {
1372                         log_syntax(unit, LOG_ERR, filename, line, r,
1373                                    "Failed to parse %s= setting, ignoring assignment: %s",
1374                                    lvalue, rvalue);
1375                         return 0;
1376                 }
1377
1378                 required = r;
1379                 range = LINK_OPERSTATE_RANGE_DEFAULT;
1380         }
1381
1382         network->required_for_online = required;
1383         network->required_operstate_for_online = range;
1384
1385         return 0;
1386 }
1387
1388 DEFINE_CONFIG_PARSE_ENUM(config_parse_keep_configuration, keep_configuration, KeepConfiguration,
1389                          "Failed to parse KeepConfiguration= setting");
1390
1391 static const char* const keep_configuration_table[_KEEP_CONFIGURATION_MAX] = {
1392         [KEEP_CONFIGURATION_NO]           = "no",
1393         [KEEP_CONFIGURATION_DHCP_ON_STOP] = "dhcp-on-stop",
1394         [KEEP_CONFIGURATION_DHCP]         = "dhcp",
1395         [KEEP_CONFIGURATION_STATIC]       = "static",
1396         [KEEP_CONFIGURATION_YES]          = "yes",
1397 };
1398
1399 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(keep_configuration, KeepConfiguration, KEEP_CONFIGURATION_YES);