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         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
 756         return mfree(network);
 757 }
 758
 759 DEFINE_TRIVIAL_REF_UNREF_FUNC(Network, network, network_free);
 760
 761 int network_get_by_name(Manager *manager, const char *name, Network **ret) {
 762         Network *network;
 763
 764         assert(manager);
 765         assert(name);
 766         assert(ret);
 767
 768         network = ordered_hashmap_get(manager->networks, name);
 769         if (!network)
 770                 return -ENOENT;
 771
 772         *ret = network;
 773
 774         return 0;
 775 }
 776
 777 int network_get(Manager *manager, unsigned short iftype, sd_device *device,
 778                 const char *ifname, char * const *alternative_names,
 779                 const struct ether_addr *address, const struct ether_addr *permanent_address,
 780                 enum nl80211_iftype wlan_iftype, const char *ssid, const struct ether_addr *bssid,
 781                 Network **ret) {
 782         Network *network;
 783         Iterator i;
 784
 785         assert(manager);
 786         assert(ret);
 787
 788         ORDERED_HASHMAP_FOREACH(network, manager->networks, i)
 789                 if (net_match_config(network->match_mac, network->match_permanent_mac,
 790                                      network->match_path, network->match_driver,
 791                                      network->match_type, network->match_name, network->match_property,
 792                                      network->match_wlan_iftype, network->match_ssid, network->match_bssid,
 793                                      iftype, device, address, permanent_address,
 794                                      ifname, alternative_names, wlan_iftype, ssid, bssid)) {
 795                         if (network->match_name && device) {
 796                                 const char *attr;
 797                                 uint8_t name_assign_type = NET_NAME_UNKNOWN;
 798
 799                                 if (sd_device_get_sysattr_value(device, "name_assign_type", &attr) >= 0)
 800                                         (void) safe_atou8(attr, &name_assign_type);
 801
 802                                 if (name_assign_type == NET_NAME_ENUM)
 803                                         log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
 804                                                     ifname, network->filename);
 805                                 else
 806                                         log_debug("%s: found matching network '%s'", ifname, network->filename);
 807                         } else
 808                                 log_debug("%s: found matching network '%s'", ifname, network->filename);
 809
 810                         *ret = network;
 811                         return 0;
 812                 }
 813
 814         *ret = NULL;
 815
 816         return -ENOENT;
 817 }
 818
 819 int network_apply(Network *network, Link *link) {
 820         assert(network);
 821         assert(link);
 822
 823         link->network = network_ref(network);
 824
 825         if (network->n_dns > 0 ||
 826             !strv_isempty(network->ntp) ||
 827             !ordered_set_isempty(network->search_domains) ||
 828             !ordered_set_isempty(network->route_domains))
 829                 link_dirty(link);
 830
 831         return 0;
 832 }
 833
 834 bool network_has_static_ipv6_configurations(Network *network) {
 835         Address *address;
 836         Route *route;
 837         FdbEntry *fdb;
 838         Neighbor *neighbor;
 839
 840         assert(network);
 841
 842         LIST_FOREACH(addresses, address, network->static_addresses)
 843                 if (address->family == AF_INET6)
 844                         return true;
 845
 846         LIST_FOREACH(routes, route, network->static_routes)
 847                 if (route->family == AF_INET6)
 848                         return true;
 849
 850         LIST_FOREACH(static_fdb_entries, fdb, network->static_fdb_entries)
 851                 if (fdb->family == AF_INET6)
 852                         return true;
 853
 854         LIST_FOREACH(neighbors, neighbor, network->neighbors)
 855                 if (neighbor->family == AF_INET6)
 856                         return true;
 857
 858         if (!LIST_IS_EMPTY(network->address_labels))
 859                 return true;
 860
 861         if (!LIST_IS_EMPTY(network->static_prefixes))
 862                 return true;
 863
 864         return false;
 865 }
 866
 867 int config_parse_stacked_netdev(const char *unit,
 868                 const char *filename,
 869                 unsigned line,
 870                 const char *section,
 871                 unsigned section_line,
 872                 const char *lvalue,
 873                 int ltype,
 874                 const char *rvalue,
 875                 void *data,
 876                 void *userdata) {
 877         _cleanup_free_ char *name = NULL;
 878         NetDevKind kind = ltype;
 879         Hashmap **h = data;
 880         int r;
 881
 882         assert(filename);
 883         assert(lvalue);
 884         assert(rvalue);
 885         assert(data);
 886         assert(IN_SET(kind,
 887                       NETDEV_KIND_VLAN, NETDEV_KIND_MACVLAN, NETDEV_KIND_MACVTAP,
 888                       NETDEV_KIND_IPVLAN, NETDEV_KIND_IPVTAP, NETDEV_KIND_VXLAN,
 889                       NETDEV_KIND_L2TP, NETDEV_KIND_MACSEC, _NETDEV_KIND_TUNNEL,
 890                       NETDEV_KIND_XFRM));
 891
 892         if (!ifname_valid(rvalue)) {
 893                 log_syntax(unit, LOG_ERR, filename, line, 0,
 894                            "Invalid netdev name in %s=, ignoring assignment: %s", lvalue, rvalue);
 895                 return 0;
 896         }
 897
 898         name = strdup(rvalue);
 899         if (!name)
 900                 return log_oom();
 901
 902         r = hashmap_ensure_allocated(h, &string_hash_ops);
 903         if (r < 0)
 904                 return log_oom();
 905
 906         r = hashmap_put(*h, name, INT_TO_PTR(kind));
 907         if (r < 0)
 908                 log_syntax(unit, LOG_ERR, filename, line, r,
 909                            "Cannot add NetDev '%s' to network, ignoring assignment: %m", name);
 910         else if (r == 0)
 911                 log_syntax(unit, LOG_DEBUG, filename, line, r,
 912                            "NetDev '%s' specified twice, ignoring.", name);
 913         else
 914                 name = NULL;
 915
 916         return 0;
 917 }
 918
 919 int config_parse_domains(
 920                 const char *unit,
 921                 const char *filename,
 922                 unsigned line,
 923                 const char *section,
 924                 unsigned section_line,
 925                 const char *lvalue,
 926                 int ltype,
 927                 const char *rvalue,
 928                 void *data,
 929                 void *userdata) {
 930
 931         const char *p;
 932         Network *n = data;
 933         int r;
 934
 935         assert(n);
 936         assert(lvalue);
 937         assert(rvalue);
 938
 939         if (isempty(rvalue)) {
 940                 n->search_domains = ordered_set_free_free(n->search_domains);
 941                 n->route_domains = ordered_set_free_free(n->route_domains);
 942                 return 0;
 943         }
 944
 945         p = rvalue;
 946         for (;;) {
 947                 _cleanup_free_ char *w = NULL, *normalized = NULL;
 948                 const char *domain;
 949                 bool is_route;
 950
 951                 r = extract_first_word(&p, &w, NULL, 0);
 952                 if (r < 0) {
 953                         log_syntax(unit, LOG_ERR, filename, line, r,
 954                                    "Failed to extract search or route domain, ignoring: %s", rvalue);
 955                         break;
 956                 }
 957                 if (r == 0)
 958                         break;
 959
 960                 is_route = w[0] == '~';
 961                 domain = is_route ? w + 1 : w;
 962
 963                 if (dns_name_is_root(domain) || streq(domain, "*")) {
 964                         /* If the root domain appears as is, or the special token "*" is found, we'll
 965                          * consider this as routing domain, unconditionally. */
 966                         is_route = true;
 967                         domain = "."; /* make sure we don't allow empty strings, thus write the root
 968                                        * domain as "." */
 969                 } else {
 970                         r = dns_name_normalize(domain, 0, &normalized);
 971                         if (r < 0) {
 972                                 log_syntax(unit, LOG_ERR, filename, line, r,
 973                                            "'%s' is not a valid domain name, ignoring.", domain);
 974                                 continue;
 975                         }
 976
 977                         domain = normalized;
 978
 979                         if (is_localhost(domain)) {
 980                                 log_syntax(unit, LOG_ERR, filename, line, 0,
 981                                            "'localhost' domain may not be configured as search or route domain, ignoring assignment: %s",
 982                                            domain);
 983                                 continue;
 984                         }
 985                 }
 986
 987                 OrderedSet **set = is_route ? &n->route_domains : &n->search_domains;
 988                 r = ordered_set_ensure_allocated(set, &string_hash_ops);
 989                 if (r < 0)
 990                         return r;
 991
 992                 r = ordered_set_put_strdup(*set, domain);
 993                 if (r < 0)
 994                         return log_oom();
 995         }
 996
 997         return 0;
 998 }
 999
1000 int config_parse_ipv6token(
1001                 const char* unit,
1002                 const char *filename,
1003                 unsigned line,
1004                 const char *section,
1005                 unsigned section_line,
1006                 const char *lvalue,
1007                 int ltype,
1008                 const char *rvalue,
1009                 void *data,
1010                 void *userdata) {
1011
1012         union in_addr_union buffer;
1013         struct in6_addr *token = data;
1014         int r;
1015
1016         assert(filename);
1017         assert(lvalue);
1018         assert(rvalue);
1019         assert(token);
1020
1021         r = in_addr_from_string(AF_INET6, rvalue, &buffer);
1022         if (r < 0) {
1023                 log_syntax(unit, LOG_ERR, filename, line, r,
1024                            "Failed to parse IPv6 token, ignoring: %s", rvalue);
1025                 return 0;
1026         }
1027
1028         if (in_addr_is_null(AF_INET6, &buffer)) {
1029                 log_syntax(unit, LOG_ERR, filename, line, 0,
1030                            "IPv6 token cannot be the ANY address, ignoring: %s", rvalue);
1031                 return 0;
1032         }
1033
1034         if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
1035                 log_syntax(unit, LOG_ERR, filename, line, 0,
1036                            "IPv6 token cannot be longer than 64 bits, ignoring: %s", rvalue);
1037                 return 0;
1038         }
1039
1040         *token = buffer.in6;
1041
1042         return 0;
1043 }
1044
1045 static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
1046         [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
1047         [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
1048         [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
1049 };
1050
1051 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(ipv6_privacy_extensions, IPv6PrivacyExtensions,
1052                                         IPV6_PRIVACY_EXTENSIONS_YES);
1053
1054 int config_parse_ipv6_privacy_extensions(
1055                 const char* unit,
1056                 const char *filename,
1057                 unsigned line,
1058                 const char *section,
1059                 unsigned section_line,
1060                 const char *lvalue,
1061                 int ltype,
1062                 const char *rvalue,
1063                 void *data,
1064                 void *userdata) {
1065
1066         IPv6PrivacyExtensions s, *ipv6_privacy_extensions = data;
1067
1068         assert(filename);
1069         assert(lvalue);
1070         assert(rvalue);
1071         assert(ipv6_privacy_extensions);
1072
1073         s = ipv6_privacy_extensions_from_string(rvalue);
1074         if (s < 0) {
1075                 if (streq(rvalue, "kernel"))
1076                         s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
1077                 else {
1078                         log_syntax(unit, LOG_ERR, filename, line, 0,
1079                                    "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
1080                         return 0;
1081                 }
1082         }
1083
1084         *ipv6_privacy_extensions = s;
1085
1086         return 0;
1087 }
1088
1089 int config_parse_hostname(
1090                 const char *unit,
1091                 const char *filename,
1092                 unsigned line,
1093                 const char *section,
1094                 unsigned section_line,
1095                 const char *lvalue,
1096                 int ltype,
1097                 const char *rvalue,
1098                 void *data,
1099                 void *userdata) {
1100
1101         _cleanup_free_ char *hn = NULL;
1102         char **hostname = data;
1103         int r;
1104
1105         assert(filename);
1106         assert(lvalue);
1107         assert(rvalue);
1108
1109         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
1110         if (r < 0)
1111                 return r;
1112
1113         if (!hostname_is_valid(hn, false)) {
1114                 log_syntax(unit, LOG_ERR, filename, line, 0,
1115                            "Hostname is not valid, ignoring assignment: %s", rvalue);
1116                 return 0;
1117         }
1118
1119         r = dns_name_is_valid(hn);
1120         if (r < 0) {
1121                 log_syntax(unit, LOG_ERR, filename, line, r,
1122                            "Failed to check validity of hostname '%s', ignoring assignment: %m", rvalue);
1123                 return 0;
1124         }
1125         if (r == 0) {
1126                 log_syntax(unit, LOG_ERR, filename, line, 0,
1127                            "Hostname is not a valid DNS domain name, ignoring assignment: %s", rvalue);
1128                 return 0;
1129         }
1130
1131         return free_and_replace(*hostname, hn);
1132 }
1133
1134 int config_parse_timezone(
1135                 const char *unit,
1136                 const char *filename,
1137                 unsigned line,
1138                 const char *section,
1139                 unsigned section_line,
1140                 const char *lvalue,
1141                 int ltype,
1142                 const char *rvalue,
1143                 void *data,
1144                 void *userdata) {
1145
1146         _cleanup_free_ char *tz = NULL;
1147         char **datap = data;
1148         int r;
1149
1150         assert(filename);
1151         assert(lvalue);
1152         assert(rvalue);
1153
1154         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
1155         if (r < 0)
1156                 return r;
1157
1158         if (!timezone_is_valid(tz, LOG_ERR)) {
1159                 log_syntax(unit, LOG_ERR, filename, line, 0,
1160                            "Timezone is not valid, ignoring assignment: %s", rvalue);
1161                 return 0;
1162         }
1163
1164         return free_and_replace(*datap, tz);
1165 }
1166
1167 int config_parse_dns(
1168                 const char *unit,
1169                 const char *filename,
1170                 unsigned line,
1171                 const char *section,
1172                 unsigned section_line,
1173                 const char *lvalue,
1174                 int ltype,
1175                 const char *rvalue,
1176                 void *data,
1177                 void *userdata) {
1178
1179         Network *n = userdata;
1180         int r;
1181
1182         assert(filename);
1183         assert(lvalue);
1184         assert(rvalue);
1185
1186         for (;;) {
1187                 _cleanup_free_ char *w = NULL;
1188                 union in_addr_union a;
1189                 struct in_addr_data *m;
1190                 int family;
1191
1192                 r = extract_first_word(&rvalue, &w, NULL, 0);
1193                 if (r == -ENOMEM)
1194                         return log_oom();
1195                 if (r < 0) {
1196                         log_syntax(unit, LOG_ERR, filename, line, r,
1197                                    "Invalid syntax, ignoring: %s", rvalue);
1198                         break;
1199                 }
1200                 if (r == 0)
1201                         break;
1202
1203                 r = in_addr_from_string_auto(w, &family, &a);
1204                 if (r < 0) {
1205                         log_syntax(unit, LOG_ERR, filename, line, r,
1206                                    "Failed to parse dns server address, ignoring: %s", w);
1207                         continue;
1208                 }
1209
1210                 m = reallocarray(n->dns, n->n_dns + 1, sizeof(struct in_addr_data));
1211                 if (!m)
1212                         return log_oom();
1213
1214                 m[n->n_dns++] = (struct in_addr_data) {
1215                         .family = family,
1216                         .address = a,
1217                 };
1218
1219                 n->dns = m;
1220         }
1221
1222         return 0;
1223 }
1224
1225 int config_parse_dnssec_negative_trust_anchors(
1226                 const char *unit,
1227                 const char *filename,
1228                 unsigned line,
1229                 const char *section,
1230                 unsigned section_line,
1231                 const char *lvalue,
1232                 int ltype,
1233                 const char *rvalue,
1234                 void *data,
1235                 void *userdata) {
1236
1237         const char *p = rvalue;
1238         Network *n = data;
1239         int r;
1240
1241         assert(n);
1242         assert(lvalue);
1243         assert(rvalue);
1244
1245         if (isempty(rvalue)) {
1246                 n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
1247                 return 0;
1248         }
1249
1250         for (;;) {
1251                 _cleanup_free_ char *w = NULL;
1252
1253                 r = extract_first_word(&p, &w, NULL, 0);
1254                 if (r < 0) {
1255                         log_syntax(unit, LOG_ERR, filename, line, r,
1256                                    "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
1257                         break;
1258                 }
1259                 if (r == 0)
1260                         break;
1261
1262                 r = dns_name_is_valid(w);
1263                 if (r <= 0) {
1264                         log_syntax(unit, LOG_ERR, filename, line, r,
1265                                    "%s is not a valid domain name, ignoring.", w);
1266                         continue;
1267                 }
1268
1269                 r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
1270                 if (r < 0)
1271                         return log_oom();
1272
1273                 r = set_put(n->dnssec_negative_trust_anchors, w);
1274                 if (r < 0)
1275                         return log_oom();
1276                 if (r > 0)
1277                         w = NULL;
1278         }
1279
1280         return 0;
1281 }
1282
1283 int config_parse_ntp(
1284                 const char *unit,
1285                 const char *filename,
1286                 unsigned line,
1287                 const char *section,
1288                 unsigned section_line,
1289                 const char *lvalue,
1290                 int ltype,
1291                 const char *rvalue,
1292                 void *data,
1293                 void *userdata) {
1294
1295         char ***l = data;
1296         int r;
1297
1298         assert(l);
1299         assert(lvalue);
1300         assert(rvalue);
1301
1302         if (isempty(rvalue)) {
1303                 *l = strv_free(*l);
1304                 return 0;
1305         }
1306
1307         for (;;) {
1308                 _cleanup_free_ char *w = NULL;
1309
1310                 r = extract_first_word(&rvalue, &w, NULL, 0);
1311                 if (r == -ENOMEM)
1312                         return log_oom();
1313                 if (r < 0) {
1314                         log_syntax(unit, LOG_ERR, filename, line, r,
1315                                    "Failed to extract NTP server name, ignoring: %s", rvalue);
1316                         break;
1317                 }
1318                 if (r == 0)
1319                         break;
1320
1321                 r = dns_name_is_valid_or_address(w);
1322                 if (r <= 0) {
1323                         log_syntax(unit, LOG_ERR, filename, line, r,
1324                                    "%s is not a valid domain name or IP address, ignoring.", w);
1325                         continue;
1326                 }
1327
1328                 if (strv_length(*l) > MAX_NTP_SERVERS) {
1329                         log_syntax(unit, LOG_WARNING, filename, line, 0,
1330                                    "More than %u NTP servers specified, ignoring \"%s\" and any subsequent entries.",
1331                                    MAX_NTP_SERVERS, w);
1332                         break;
1333                 }
1334
1335                 r = strv_consume(l, TAKE_PTR(w));
1336                 if (r < 0)
1337                         return log_oom();
1338         }
1339
1340         return 0;
1341 }
1342
1343 int config_parse_required_for_online(
1344                 const char *unit,
1345                 const char *filename,
1346                 unsigned line,
1347                 const char *section,
1348                 unsigned section_line,
1349                 const char *lvalue,
1350                 int ltype,
1351                 const char *rvalue,
1352                 void *data,
1353                 void *userdata) {
1354
1355         Network *network = data;
1356         LinkOperationalStateRange range;
1357         bool required = true;
1358         int r;
1359
1360         if (isempty(rvalue)) {
1361                 network->required_for_online = true;
1362                 network->required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT;
1363                 return 0;
1364         }
1365
1366         r = parse_operational_state_range(rvalue, &range);
1367         if (r < 0) {
1368                 r = parse_boolean(rvalue);
1369                 if (r < 0) {
1370                         log_syntax(unit, LOG_ERR, filename, line, r,
1371                                    "Failed to parse %s= setting, ignoring assignment: %s",
1372                                    lvalue, rvalue);
1373                         return 0;
1374                 }
1375
1376                 required = r;
1377                 range = LINK_OPERSTATE_RANGE_DEFAULT;
1378         }
1379
1380         network->required_for_online = required;
1381         network->required_operstate_for_online = range;
1382
1383         return 0;
1384 }
1385
1386 DEFINE_CONFIG_PARSE_ENUM(config_parse_keep_configuration, keep_configuration, KeepConfiguration,
1387                          "Failed to parse KeepConfiguration= setting");
1388
1389 static const char* const keep_configuration_table[_KEEP_CONFIGURATION_MAX] = {
1390         [KEEP_CONFIGURATION_NO]           = "no",
1391         [KEEP_CONFIGURATION_DHCP_ON_STOP] = "dhcp-on-stop",
1392         [KEEP_CONFIGURATION_DHCP]         = "dhcp",
1393         [KEEP_CONFIGURATION_STATIC]       = "static",
1394         [KEEP_CONFIGURATION_YES]          = "yes",
1395 };
1396
1397 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(keep_configuration, KeepConfiguration, KEEP_CONFIGURATION_YES);