src/network/networkd-network.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <ctype.h>
  21 #include <net/if.h>
  22
  23 #include "alloc-util.h"
  24 #include "conf-files.h"
  25 #include "conf-parser.h"
  26 #include "dns-domain.h"
  27 #include "fd-util.h"
  28 #include "hostname-util.h"
  29 #include "in-addr-util.h"
  30 #include "network-internal.h"
  31 #include "networkd-manager.h"
  32 #include "networkd-network.h"
  33 #include "parse-util.h"
  34 #include "set.h"
  35 #include "stat-util.h"
  36 #include "string-table.h"
  37 #include "string-util.h"
  38 #include "util.h"
  39
  40 static void network_config_hash_func(const void *p, struct siphash *state) {
  41         const NetworkConfigSection *c = p;
  42
  43         siphash24_compress(c->filename, strlen(c->filename), state);
  44         siphash24_compress(&c->line, sizeof(c->line), state);
  45 }
  46
  47 static int network_config_compare_func(const void *a, const void *b) {
  48         const NetworkConfigSection *x = a, *y = b;
  49         int r;
  50
  51         r = strcmp(x->filename, y->filename);
  52         if (r != 0)
  53                 return r;
  54
  55         return y->line - x->line;
  56 }
  57
  58 const struct hash_ops network_config_hash_ops = {
  59         .hash = network_config_hash_func,
  60         .compare = network_config_compare_func,
  61 };
  62
  63 int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s) {
  64         NetworkConfigSection *cs;
  65
  66         cs = malloc0(offsetof(NetworkConfigSection, filename) + strlen(filename) + 1);
  67         if (!cs)
  68                 return -ENOMEM;
  69
  70         strcpy(cs->filename, filename);
  71         cs->line = line;
  72
  73         *s = cs;
  74         cs = NULL;
  75
  76         return 0;
  77 }
  78
  79 void network_config_section_free(NetworkConfigSection *cs) {
  80         free(cs);
  81 }
  82
  83 /* Set defaults following RFC7844 */
  84 void network_apply_anonymize_if_set(Network *network) {
  85         if (!network->dhcp_anonymize)
  86                 return;
  87         /* RFC7844 3.7
  88          SHOULD NOT send the Host Name option */
  89         network->dhcp_send_hostname = false;
  90         /* RFC7844 section 3.:
  91          MAY contain the Client Identifier option
  92          Section 3.5:
  93          clients MUST use client identifiers based solely
  94          on the link-layer address */
  95         /* NOTE: Using MAC, as it does not reveal extra information,
  96         * and some servers might not answer if this option is not sent */
  97         network->dhcp_client_identifier = DHCP_CLIENT_ID_MAC;
  98         /* RFC 7844 3.10:
  99          SHOULD NOT use the Vendor Class Identifier option */
 100         /* NOTE: it was not initiallized to any value in network_load_one. */
 101         network->dhcp_vendor_class_identifier = false;
 102         /* RFC7844 section 3.6.:
 103          The client intending to protect its privacy SHOULD only request a
 104          minimal number of options in the PRL and SHOULD also randomly shuffle
 105          the ordering of option codes in the PRL.  If this random ordering
 106          cannot be implemented, the client MAY order the option codes in the
 107          PRL by option code number (lowest to highest).
 108         */
 109         /* NOTE: dhcp_use_mtu is false by default,
 110         * though it was not initiallized to any value in network_load_one.
 111         * Maybe there should be another var called *send*?
 112         * (to use the MTU sent by the server but to do not send
 113         * the option in the PRL). */
 114         network->dhcp_use_mtu = false;
 115         /* RFC7844 section 3.6.
 116         * same comments as previous option */
 117         network->dhcp_use_routes = false;
 118         /* RFC7844 section 3.6.
 119         * same comments as previous option */
 120         network->dhcp_use_timezone = false;
 121 }
 122
 123 static int network_load_one(Manager *manager, const char *filename) {
 124         _cleanup_network_free_ Network *network = NULL;
 125         _cleanup_fclose_ FILE *file = NULL;
 126         char *d;
 127         const char *dropin_dirname;
 128         Route *route;
 129         Address *address;
 130         int r;
 131
 132         assert(manager);
 133         assert(filename);
 134
 135         file = fopen(filename, "re");
 136         if (!file) {
 137                 if (errno == ENOENT)
 138                         return 0;
 139
 140                 return -errno;
 141         }
 142
 143         if (null_or_empty_fd(fileno(file))) {
 144                 log_debug("Skipping empty file: %s", filename);
 145                 return 0;
 146         }
 147
 148         network = new0(Network, 1);
 149         if (!network)
 150                 return log_oom();
 151
 152         network->manager = manager;
 153
 154         LIST_HEAD_INIT(network->static_addresses);
 155         LIST_HEAD_INIT(network->static_routes);
 156         LIST_HEAD_INIT(network->static_fdb_entries);
 157         LIST_HEAD_INIT(network->ipv6_proxy_ndp_addresses);
 158         LIST_HEAD_INIT(network->address_labels);
 159         LIST_HEAD_INIT(network->static_prefixes);
 160         LIST_HEAD_INIT(network->rules);
 161
 162         network->stacked_netdevs = hashmap_new(&string_hash_ops);
 163         if (!network->stacked_netdevs)
 164                 return log_oom();
 165
 166         network->addresses_by_section = hashmap_new(&network_config_hash_ops);
 167         if (!network->addresses_by_section)
 168                 return log_oom();
 169
 170         network->routes_by_section = hashmap_new(&network_config_hash_ops);
 171         if (!network->routes_by_section)
 172                 return log_oom();
 173
 174         network->fdb_entries_by_section = hashmap_new(NULL);
 175         if (!network->fdb_entries_by_section)
 176                 return log_oom();
 177
 178         network->address_labels_by_section = hashmap_new(&network_config_hash_ops);
 179         if (!network->address_labels_by_section)
 180                 log_oom();
 181
 182         network->prefixes_by_section = hashmap_new(&network_config_hash_ops);
 183         if (!network->prefixes_by_section)
 184                 return log_oom();
 185
 186         network->rules_by_section = hashmap_new(&network_config_hash_ops);
 187         if (!network->rules_by_section)
 188                 return log_oom();
 189
 190         network->filename = strdup(filename);
 191         if (!network->filename)
 192                 return log_oom();
 193
 194         network->name = strdup(basename(filename));
 195         if (!network->name)
 196                 return log_oom();
 197
 198         d = strrchr(network->name, '.');
 199         if (!d)
 200                 return -EINVAL;
 201
 202         assert(streq(d, ".network"));
 203
 204         *d = '\0';
 205
 206         network->dhcp = ADDRESS_FAMILY_NO;
 207         network->dhcp_use_ntp = true;
 208         network->dhcp_use_dns = true;
 209         network->dhcp_use_hostname = true;
 210         /* NOTE: this var might be overwriten by network_apply_anonymize_if_set */
 211         network->dhcp_use_routes = true;
 212         /* NOTE: this var might be overwriten by network_apply_anonymize_if_set */
 213         network->dhcp_send_hostname = true;
 214         /* To enable/disable RFC7844 Anonymity Profiles */
 215         network->dhcp_anonymize = false;
 216         network->dhcp_route_metric = DHCP_ROUTE_METRIC;
 217         /* NOTE: this var might be overwrite by network_apply_anonymize_if_set */
 218         network->dhcp_client_identifier = DHCP_CLIENT_ID_DUID;
 219         network->dhcp_route_table = RT_TABLE_MAIN;
 220         /* NOTE: the following vars were not set to any default,
 221          * even if they are commented in the man?
 222          * These vars might be overwriten by network_apply_anonymize_if_set */
 223         network->dhcp_vendor_class_identifier = false;
 224         /* NOTE: from man: UseMTU=... Defaults to false*/
 225         network->dhcp_use_mtu = false;
 226         /* NOTE: from man: UseTimezone=... Defaults to "no".*/
 227         network->dhcp_use_timezone = false;
 228
 229         network->dhcp_server_emit_dns = true;
 230         network->dhcp_server_emit_ntp = true;
 231         network->dhcp_server_emit_router = true;
 232         network->dhcp_server_emit_timezone = true;
 233
 234         network->use_bpdu = true;
 235         network->allow_port_to_be_root = true;
 236         network->unicast_flood = true;
 237         network->priority = LINK_BRIDGE_PORT_PRIORITY_INVALID;
 238
 239         network->lldp_mode = LLDP_MODE_ROUTERS_ONLY;
 240
 241         network->llmnr = RESOLVE_SUPPORT_YES;
 242         network->mdns = RESOLVE_SUPPORT_NO;
 243         network->dnssec_mode = _DNSSEC_MODE_INVALID;
 244
 245         network->link_local = ADDRESS_FAMILY_IPV6;
 246
 247         network->ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
 248         network->ipv6_accept_ra = -1;
 249         network->ipv6_dad_transmits = -1;
 250         network->ipv6_hop_limit = -1;
 251         network->ipv6_proxy_ndp = -1;
 252         network->duid.type = _DUID_TYPE_INVALID;
 253         network->proxy_arp = -1;
 254         network->arp = -1;
 255         network->ipv6_accept_ra_use_dns = true;
 256         network->ipv6_accept_ra_route_table = RT_TABLE_MAIN;
 257
 258         dropin_dirname = strjoina(network->name, ".network.d");
 259
 260         r = config_parse_many(filename, network_dirs, dropin_dirname,
 261                               "Match\0"
 262                               "Link\0"
 263                               "Network\0"
 264                               "Address\0"
 265                               "IPv6AddressLabel\0"
 266                               "RoutingPolicyRule\0"
 267                               "Route\0"
 268                               "DHCP\0"
 269                               "DHCPv4\0" /* compat */
 270                               "DHCPServer\0"
 271                               "IPv6AcceptRA\0"
 272                               "IPv6NDPProxyAddress\0"
 273                               "Bridge\0"
 274                               "BridgeFDB\0"
 275                               "BridgeVLAN\0"
 276                               "IPv6PrefixDelegation\0"
 277                               "IPv6Prefix\0",
 278                               config_item_perf_lookup, network_network_gperf_lookup,
 279                               false, network);
 280         if (r < 0)
 281                 return r;
 282
 283         network_apply_anonymize_if_set(network);
 284
 285         /* IPMasquerade=yes implies IPForward=yes */
 286         if (network->ip_masquerade)
 287                 network->ip_forward |= ADDRESS_FAMILY_IPV4;
 288
 289         LIST_PREPEND(networks, manager->networks, network);
 290
 291         r = hashmap_ensure_allocated(&manager->networks_by_name, &string_hash_ops);
 292         if (r < 0)
 293                 return r;
 294
 295         r = hashmap_put(manager->networks_by_name, network->name, network);
 296         if (r < 0)
 297                 return r;
 298
 299         LIST_FOREACH(routes, route, network->static_routes) {
 300                 if (!route->family) {
 301                         log_warning("Route section without Gateway field configured in %s. "
 302                                     "Ignoring", filename);
 303                         return 0;
 304                 }
 305         }
 306
 307         LIST_FOREACH(addresses, address, network->static_addresses) {
 308                 if (!address->family) {
 309                         log_warning("Address section without Address field configured in %s. "
 310                                     "Ignoring", filename);
 311                         return 0;
 312                 }
 313         }
 314
 315         network = NULL;
 316
 317         return 0;
 318 }
 319
 320 int network_load(Manager *manager) {
 321         Network *network;
 322         _cleanup_strv_free_ char **files = NULL;
 323         char **f;
 324         int r;
 325
 326         assert(manager);
 327
 328         while ((network = manager->networks))
 329                 network_free(network);
 330
 331         r = conf_files_list_strv(&files, ".network", NULL, 0, network_dirs);
 332         if (r < 0)
 333                 return log_error_errno(r, "Failed to enumerate network files: %m");
 334
 335         STRV_FOREACH_BACKWARDS(f, files) {
 336                 r = network_load_one(manager, *f);
 337                 if (r < 0)
 338                         return r;
 339         }
 340
 341         return 0;
 342 }
 343
 344 void network_free(Network *network) {
 345         IPv6ProxyNDPAddress *ipv6_proxy_ndp_address;
 346         RoutingPolicyRule *rule;
 347         FdbEntry *fdb_entry;
 348         AddressLabel *label;
 349         Prefix *prefix;
 350         Address *address;
 351         NetDev *netdev;
 352         Route *route;
 353         Iterator i;
 354
 355         if (!network)
 356                 return;
 357
 358         free(network->filename);
 359
 360         free(network->match_mac);
 361         strv_free(network->match_path);
 362         strv_free(network->match_driver);
 363         strv_free(network->match_type);
 364         strv_free(network->match_name);
 365
 366         free(network->description);
 367         free(network->dhcp_vendor_class_identifier);
 368         free(network->dhcp_hostname);
 369
 370         free(network->mac);
 371
 372         strv_free(network->ntp);
 373         free(network->dns);
 374         strv_free(network->search_domains);
 375         strv_free(network->route_domains);
 376         strv_free(network->bind_carrier);
 377
 378         netdev_unref(network->bridge);
 379         netdev_unref(network->bond);
 380         netdev_unref(network->vrf);
 381
 382         HASHMAP_FOREACH(netdev, network->stacked_netdevs, i) {
 383                 hashmap_remove(network->stacked_netdevs, netdev->ifname);
 384                 netdev_unref(netdev);
 385         }
 386         hashmap_free(network->stacked_netdevs);
 387
 388         while ((route = network->static_routes))
 389                 route_free(route);
 390
 391         while ((address = network->static_addresses))
 392                 address_free(address);
 393
 394         while ((fdb_entry = network->static_fdb_entries))
 395                 fdb_entry_free(fdb_entry);
 396
 397         while ((ipv6_proxy_ndp_address = network->ipv6_proxy_ndp_addresses))
 398                 ipv6_proxy_ndp_address_free(ipv6_proxy_ndp_address);
 399
 400         while ((label = network->address_labels))
 401                 address_label_free(label);
 402
 403         while ((prefix = network->static_prefixes))
 404                 prefix_free(prefix);
 405
 406         while ((rule = network->rules))
 407                 routing_policy_rule_free(rule);
 408
 409         hashmap_free(network->addresses_by_section);
 410         hashmap_free(network->routes_by_section);
 411         hashmap_free(network->fdb_entries_by_section);
 412         hashmap_free(network->address_labels_by_section);
 413         hashmap_free(network->prefixes_by_section);
 414         hashmap_free(network->rules_by_section);
 415
 416         if (network->manager) {
 417                 if (network->manager->networks)
 418                         LIST_REMOVE(networks, network->manager->networks, network);
 419
 420                 if (network->manager->networks_by_name)
 421                         hashmap_remove(network->manager->networks_by_name, network->name);
 422         }
 423
 424         free(network->name);
 425
 426         condition_free_list(network->match_host);
 427         condition_free_list(network->match_virt);
 428         condition_free_list(network->match_kernel);
 429         condition_free_list(network->match_arch);
 430
 431         free(network->dhcp_server_timezone);
 432         free(network->dhcp_server_dns);
 433         free(network->dhcp_server_ntp);
 434
 435         set_free_free(network->dnssec_negative_trust_anchors);
 436
 437         free(network);
 438 }
 439
 440 int network_get_by_name(Manager *manager, const char *name, Network **ret) {
 441         Network *network;
 442
 443         assert(manager);
 444         assert(name);
 445         assert(ret);
 446
 447         network = hashmap_get(manager->networks_by_name, name);
 448         if (!network)
 449                 return -ENOENT;
 450
 451         *ret = network;
 452
 453         return 0;
 454 }
 455
 456 int network_get(Manager *manager, struct udev_device *device,
 457                 const char *ifname, const struct ether_addr *address,
 458                 Network **ret) {
 459         Network *network;
 460         struct udev_device *parent;
 461         const char *path = NULL, *parent_driver = NULL, *driver = NULL, *devtype = NULL;
 462
 463         assert(manager);
 464         assert(ret);
 465
 466         if (device) {
 467                 path = udev_device_get_property_value(device, "ID_PATH");
 468
 469                 parent = udev_device_get_parent(device);
 470                 if (parent)
 471                         parent_driver = udev_device_get_driver(parent);
 472
 473                 driver = udev_device_get_property_value(device, "ID_NET_DRIVER");
 474
 475                 devtype = udev_device_get_devtype(device);
 476         }
 477
 478         LIST_FOREACH(networks, network, manager->networks) {
 479                 if (net_match_config(network->match_mac, network->match_path,
 480                                      network->match_driver, network->match_type,
 481                                      network->match_name, network->match_host,
 482                                      network->match_virt, network->match_kernel,
 483                                      network->match_arch,
 484                                      address, path, parent_driver, driver,
 485                                      devtype, ifname)) {
 486                         if (network->match_name && device) {
 487                                 const char *attr;
 488                                 uint8_t name_assign_type = NET_NAME_UNKNOWN;
 489
 490                                 attr = udev_device_get_sysattr_value(device, "name_assign_type");
 491                                 if (attr)
 492                                         (void) safe_atou8(attr, &name_assign_type);
 493
 494                                 if (name_assign_type == NET_NAME_ENUM)
 495                                         log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
 496                                                     ifname, network->filename);
 497                                 else
 498                                         log_debug("%s: found matching network '%s'", ifname, network->filename);
 499                         } else
 500                                 log_debug("%s: found matching network '%s'", ifname, network->filename);
 501
 502                         *ret = network;
 503                         return 0;
 504                 }
 505         }
 506
 507         *ret = NULL;
 508
 509         return -ENOENT;
 510 }
 511
 512 int network_apply(Network *network, Link *link) {
 513         int r;
 514
 515         assert(network);
 516         assert(link);
 517
 518         link->network = network;
 519
 520         if (network->ipv4ll_route) {
 521                 Route *route;
 522
 523                 r = route_new_static(network, NULL, 0, &route);
 524                 if (r < 0)
 525                         return r;
 526
 527                 r = inet_pton(AF_INET, "169.254.0.0", &route->dst.in);
 528                 if (r == 0)
 529                         return -EINVAL;
 530                 if (r < 0)
 531                         return -errno;
 532
 533                 route->family = AF_INET;
 534                 route->dst_prefixlen = 16;
 535                 route->scope = RT_SCOPE_LINK;
 536                 route->priority = IPV4LL_ROUTE_METRIC;
 537                 route->protocol = RTPROT_STATIC;
 538         }
 539
 540         if (network->n_dns > 0 ||
 541             !strv_isempty(network->ntp) ||
 542             !strv_isempty(network->search_domains) ||
 543             !strv_isempty(network->route_domains))
 544                 link_dirty(link);
 545
 546         return 0;
 547 }
 548
 549 bool network_has_static_ipv6_addresses(Network *network) {
 550         Address *address;
 551
 552         assert(network);
 553
 554         LIST_FOREACH(addresses, address, network->static_addresses) {
 555                 if (address->family == AF_INET6)
 556                         return true;
 557         }
 558
 559         return false;
 560 }
 561
 562 int config_parse_netdev(const char *unit,
 563                 const char *filename,
 564                 unsigned line,
 565                 const char *section,
 566                 unsigned section_line,
 567                 const char *lvalue,
 568                 int ltype,
 569                 const char *rvalue,
 570                 void *data,
 571                 void *userdata) {
 572         Network *network = userdata;
 573         _cleanup_free_ char *kind_string = NULL;
 574         char *p;
 575         NetDev *netdev;
 576         NetDevKind kind;
 577         int r;
 578
 579         assert(filename);
 580         assert(lvalue);
 581         assert(rvalue);
 582         assert(data);
 583
 584         kind_string = strdup(lvalue);
 585         if (!kind_string)
 586                 return log_oom();
 587
 588         /* the keys are CamelCase versions of the kind */
 589         for (p = kind_string; *p; p++)
 590                 *p = tolower(*p);
 591
 592         kind = netdev_kind_from_string(kind_string);
 593         if (kind == _NETDEV_KIND_INVALID) {
 594                 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid NetDev kind: %s", lvalue);
 595                 return 0;
 596         }
 597
 598         r = netdev_get(network->manager, rvalue, &netdev);
 599         if (r < 0) {
 600                 log_syntax(unit, LOG_ERR, filename, line, r, "%s could not be found, ignoring assignment: %s", lvalue, rvalue);
 601                 return 0;
 602         }
 603
 604         if (netdev->kind != kind) {
 605                 log_syntax(unit, LOG_ERR, filename, line, 0, "NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue);
 606                 return 0;
 607         }
 608
 609         switch (kind) {
 610         case NETDEV_KIND_BRIDGE:
 611                 network->bridge = netdev;
 612
 613                 break;
 614         case NETDEV_KIND_BOND:
 615                 network->bond = netdev;
 616
 617                 break;
 618         case NETDEV_KIND_VRF:
 619                 network->vrf = netdev;
 620
 621                 break;
 622         case NETDEV_KIND_VLAN:
 623         case NETDEV_KIND_MACVLAN:
 624         case NETDEV_KIND_MACVTAP:
 625         case NETDEV_KIND_IPVLAN:
 626         case NETDEV_KIND_VXLAN:
 627         case NETDEV_KIND_VCAN:
 628                 r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
 629                 if (r < 0) {
 630                         log_syntax(unit, LOG_ERR, filename, line, r, "Can not add NetDev '%s' to network: %m", rvalue);
 631                         return 0;
 632                 }
 633
 634                 break;
 635         default:
 636                 assert_not_reached("Can not parse NetDev");
 637         }
 638
 639         netdev_ref(netdev);
 640
 641         return 0;
 642 }
 643
 644 int config_parse_domains(
 645                 const char *unit,
 646                 const char *filename,
 647                 unsigned line,
 648                 const char *section,
 649                 unsigned section_line,
 650                 const char *lvalue,
 651                 int ltype,
 652                 const char *rvalue,
 653                 void *data,
 654                 void *userdata) {
 655
 656         const char *p;
 657         Network *n = data;
 658         int r;
 659
 660         assert(n);
 661         assert(lvalue);
 662         assert(rvalue);
 663
 664         if (isempty(rvalue)) {
 665                 n->search_domains = strv_free(n->search_domains);
 666                 n->route_domains = strv_free(n->route_domains);
 667                 return 0;
 668         }
 669
 670         p = rvalue;
 671         for (;;) {
 672                 _cleanup_free_ char *w = NULL, *normalized = NULL;
 673                 const char *domain;
 674                 bool is_route;
 675
 676                 r = extract_first_word(&p, &w, NULL, 0);
 677                 if (r < 0) {
 678                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract search or route domain, ignoring: %s", rvalue);
 679                         break;
 680                 }
 681                 if (r == 0)
 682                         break;
 683
 684                 is_route = w[0] == '~';
 685                 domain = is_route ? w + 1 : w;
 686
 687                 if (dns_name_is_root(domain) || streq(domain, "*")) {
 688                         /* If the root domain appears as is, or the special token "*" is found, we'll consider this as
 689                          * routing domain, unconditionally. */
 690                         is_route = true;
 691                         domain = "."; /* make sure we don't allow empty strings, thus write the root domain as "." */
 692
 693                 } else {
 694                         r = dns_name_normalize(domain, &normalized);
 695                         if (r < 0) {
 696                                 log_syntax(unit, LOG_ERR, filename, line, r, "'%s' is not a valid domain name, ignoring.", domain);
 697                                 continue;
 698                         }
 699
 700                         domain = normalized;
 701
 702                         if (is_localhost(domain)) {
 703                                 log_syntax(unit, LOG_ERR, filename, line, 0, "'localhost' domain names may not be configure as search or route domains, ignoring assignment: %s", domain);
 704                                 continue;
 705                         }
 706                 }
 707
 708                 if (is_route) {
 709                         r = strv_extend(&n->route_domains, domain);
 710                         if (r < 0)
 711                                 return log_oom();
 712
 713                 } else {
 714                         r = strv_extend(&n->search_domains, domain);
 715                         if (r < 0)
 716                                 return log_oom();
 717                 }
 718         }
 719
 720         strv_uniq(n->route_domains);
 721         strv_uniq(n->search_domains);
 722
 723         return 0;
 724 }
 725
 726 int config_parse_tunnel(const char *unit,
 727                         const char *filename,
 728                         unsigned line,
 729                         const char *section,
 730                         unsigned section_line,
 731                         const char *lvalue,
 732                         int ltype,
 733                         const char *rvalue,
 734                         void *data,
 735                         void *userdata) {
 736         Network *network = userdata;
 737         NetDev *netdev;
 738         int r;
 739
 740         assert(filename);
 741         assert(lvalue);
 742         assert(rvalue);
 743         assert(data);
 744
 745         r = netdev_get(network->manager, rvalue, &netdev);
 746         if (r < 0) {
 747                 log_syntax(unit, LOG_ERR, filename, line, r, "Tunnel is invalid, ignoring assignment: %s", rvalue);
 748                 return 0;
 749         }
 750
 751         if (netdev->kind != NETDEV_KIND_IPIP &&
 752             netdev->kind != NETDEV_KIND_SIT &&
 753             netdev->kind != NETDEV_KIND_GRE &&
 754             netdev->kind != NETDEV_KIND_GRETAP &&
 755             netdev->kind != NETDEV_KIND_IP6GRE &&
 756             netdev->kind != NETDEV_KIND_IP6GRETAP &&
 757             netdev->kind != NETDEV_KIND_VTI &&
 758             netdev->kind != NETDEV_KIND_VTI6 &&
 759             netdev->kind != NETDEV_KIND_IP6TNL
 760         ) {
 761                 log_syntax(unit, LOG_ERR, filename, line, 0,
 762                            "NetDev is not a tunnel, ignoring assignment: %s", rvalue);
 763                 return 0;
 764         }
 765
 766         r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
 767         if (r < 0) {
 768                 log_syntax(unit, LOG_ERR, filename, line, r, "Cannot add VLAN '%s' to network, ignoring: %m", rvalue);
 769                 return 0;
 770         }
 771
 772         netdev_ref(netdev);
 773
 774         return 0;
 775 }
 776
 777 int config_parse_ipv4ll(
 778                 const char* unit,
 779                 const char *filename,
 780                 unsigned line,
 781                 const char *section,
 782                 unsigned section_line,
 783                 const char *lvalue,
 784                 int ltype,
 785                 const char *rvalue,
 786                 void *data,
 787                 void *userdata) {
 788
 789         AddressFamilyBoolean *link_local = data;
 790
 791         assert(filename);
 792         assert(lvalue);
 793         assert(rvalue);
 794         assert(data);
 795
 796         /* Note that this is mostly like
 797          * config_parse_address_family_boolean(), except that it
 798          * applies only to IPv4 */
 799
 800         SET_FLAG(*link_local, ADDRESS_FAMILY_IPV4, parse_boolean(rvalue));
 801
 802         return 0;
 803 }
 804
 805 int config_parse_dhcp(
 806                 const char* unit,
 807                 const char *filename,
 808                 unsigned line,
 809                 const char *section,
 810                 unsigned section_line,
 811                 const char *lvalue,
 812                 int ltype,
 813                 const char *rvalue,
 814                 void *data,
 815                 void *userdata) {
 816
 817         AddressFamilyBoolean *dhcp = data, s;
 818
 819         assert(filename);
 820         assert(lvalue);
 821         assert(rvalue);
 822         assert(data);
 823
 824         /* Note that this is mostly like
 825          * config_parse_address_family_boolean(), except that it
 826          * understands some old names for the enum values */
 827
 828         s = address_family_boolean_from_string(rvalue);
 829         if (s < 0) {
 830
 831                 /* Previously, we had a slightly different enum here,
 832                  * support its values for compatbility. */
 833
 834                 if (streq(rvalue, "none"))
 835                         s = ADDRESS_FAMILY_NO;
 836                 else if (streq(rvalue, "v4"))
 837                         s = ADDRESS_FAMILY_IPV4;
 838                 else if (streq(rvalue, "v6"))
 839                         s = ADDRESS_FAMILY_IPV6;
 840                 else if (streq(rvalue, "both"))
 841                         s = ADDRESS_FAMILY_YES;
 842                 else {
 843                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DHCP option, ignoring: %s", rvalue);
 844                         return 0;
 845                 }
 846         }
 847
 848         *dhcp = s;
 849         return 0;
 850 }
 851
 852 static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = {
 853         [DHCP_CLIENT_ID_MAC] = "mac",
 854         [DHCP_CLIENT_ID_DUID] = "duid"
 855 };
 856
 857 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_client_identifier, DHCPClientIdentifier);
 858 DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_client_identifier, dhcp_client_identifier, DHCPClientIdentifier, "Failed to parse client identifier type");
 859
 860 int config_parse_ipv6token(
 861                 const char* unit,
 862                 const char *filename,
 863                 unsigned line,
 864                 const char *section,
 865                 unsigned section_line,
 866                 const char *lvalue,
 867                 int ltype,
 868                 const char *rvalue,
 869                 void *data,
 870                 void *userdata) {
 871
 872         union in_addr_union buffer;
 873         struct in6_addr *token = data;
 874         int r;
 875
 876         assert(filename);
 877         assert(lvalue);
 878         assert(rvalue);
 879         assert(token);
 880
 881         r = in_addr_from_string(AF_INET6, rvalue, &buffer);
 882         if (r < 0) {
 883                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse IPv6 token, ignoring: %s", rvalue);
 884                 return 0;
 885         }
 886
 887         r = in_addr_is_null(AF_INET6, &buffer);
 888         if (r != 0) {
 889                 log_syntax(unit, LOG_ERR, filename, line, r, "IPv6 token can not be the ANY address, ignoring: %s", rvalue);
 890                 return 0;
 891         }
 892
 893         if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
 894                 log_syntax(unit, LOG_ERR, filename, line, 0, "IPv6 token can not be longer than 64 bits, ignoring: %s", rvalue);
 895                 return 0;
 896         }
 897
 898         *token = buffer.in6;
 899
 900         return 0;
 901 }
 902
 903 static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
 904         [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
 905         [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
 906         [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
 907 };
 908
 909 DEFINE_STRING_TABLE_LOOKUP(ipv6_privacy_extensions, IPv6PrivacyExtensions);
 910
 911 int config_parse_ipv6_privacy_extensions(
 912                 const char* unit,
 913                 const char *filename,
 914                 unsigned line,
 915                 const char *section,
 916                 unsigned section_line,
 917                 const char *lvalue,
 918                 int ltype,
 919                 const char *rvalue,
 920                 void *data,
 921                 void *userdata) {
 922
 923         IPv6PrivacyExtensions *ipv6_privacy_extensions = data;
 924         int k;
 925
 926         assert(filename);
 927         assert(lvalue);
 928         assert(rvalue);
 929         assert(ipv6_privacy_extensions);
 930
 931         /* Our enum shall be a superset of booleans, hence first try
 932          * to parse as boolean, and then as enum */
 933
 934         k = parse_boolean(rvalue);
 935         if (k > 0)
 936                 *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_YES;
 937         else if (k == 0)
 938                 *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
 939         else {
 940                 IPv6PrivacyExtensions s;
 941
 942                 s = ipv6_privacy_extensions_from_string(rvalue);
 943                 if (s < 0) {
 944
 945                         if (streq(rvalue, "kernel"))
 946                                 s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
 947                         else {
 948                                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
 949                                 return 0;
 950                         }
 951                 }
 952
 953                 *ipv6_privacy_extensions = s;
 954         }
 955
 956         return 0;
 957 }
 958
 959 int config_parse_hostname(
 960                 const char *unit,
 961                 const char *filename,
 962                 unsigned line,
 963                 const char *section,
 964                 unsigned section_line,
 965                 const char *lvalue,
 966                 int ltype,
 967                 const char *rvalue,
 968                 void *data,
 969                 void *userdata) {
 970
 971         char **hostname = data, *hn = NULL;
 972         int r;
 973
 974         assert(filename);
 975         assert(lvalue);
 976         assert(rvalue);
 977
 978         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
 979         if (r < 0)
 980                 return r;
 981
 982         if (!hostname_is_valid(hn, false)) {
 983                 log_syntax(unit, LOG_ERR, filename, line, 0, "Hostname is not valid, ignoring assignment: %s", rvalue);
 984                 free(hn);
 985                 return 0;
 986         }
 987
 988         free(*hostname);
 989         *hostname = hostname_cleanup(hn);
 990         return 0;
 991 }
 992
 993 int config_parse_timezone(
 994                 const char *unit,
 995                 const char *filename,
 996                 unsigned line,
 997                 const char *section,
 998                 unsigned section_line,
 999                 const char *lvalue,
1000                 int ltype,
1001                 const char *rvalue,
1002                 void *data,
1003                 void *userdata) {
1004
1005         char **datap = data, *tz = NULL;
1006         int r;
1007
1008         assert(filename);
1009         assert(lvalue);
1010         assert(rvalue);
1011
1012         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
1013         if (r < 0)
1014                 return r;
1015
1016         if (!timezone_is_valid(tz)) {
1017                 log_syntax(unit, LOG_ERR, filename, line, 0, "Timezone is not valid, ignoring assignment: %s", rvalue);
1018                 free(tz);
1019                 return 0;
1020         }
1021
1022         free(*datap);
1023         *datap = tz;
1024
1025         return 0;
1026 }
1027
1028 int config_parse_dhcp_server_dns(
1029                 const char *unit,
1030                 const char *filename,
1031                 unsigned line,
1032                 const char *section,
1033                 unsigned section_line,
1034                 const char *lvalue,
1035                 int ltype,
1036                 const char *rvalue,
1037                 void *data,
1038                 void *userdata) {
1039
1040         Network *n = data;
1041         const char *p = rvalue;
1042         int r;
1043
1044         assert(filename);
1045         assert(lvalue);
1046         assert(rvalue);
1047
1048         for (;;) {
1049                 _cleanup_free_ char *w = NULL;
1050                 struct in_addr a, *m;
1051
1052                 r = extract_first_word(&p, &w, NULL, 0);
1053                 if (r == -ENOMEM)
1054                         return log_oom();
1055                 if (r < 0) {
1056                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1057                         return 0;
1058                 }
1059                 if (r == 0)
1060                         break;
1061
1062                 if (inet_pton(AF_INET, w, &a) <= 0) {
1063                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DNS server address, ignoring: %s", w);
1064                         continue;
1065                 }
1066
1067                 m = realloc(n->dhcp_server_dns, (n->n_dhcp_server_dns + 1) * sizeof(struct in_addr));
1068                 if (!m)
1069                         return log_oom();
1070
1071                 m[n->n_dhcp_server_dns++] = a;
1072                 n->dhcp_server_dns = m;
1073         }
1074
1075         return 0;
1076 }
1077
1078 int config_parse_radv_dns(
1079                 const char *unit,
1080                 const char *filename,
1081                 unsigned line,
1082                 const char *section,
1083                 unsigned section_line,
1084                 const char *lvalue,
1085                 int ltype,
1086                 const char *rvalue,
1087                 void *data,
1088                 void *userdata) {
1089
1090         Network *n = data;
1091         const char *p = rvalue;
1092         int r;
1093
1094         assert(filename);
1095         assert(lvalue);
1096         assert(rvalue);
1097
1098         for (;;) {
1099                 _cleanup_free_ char *w = NULL;
1100                 union in_addr_union a;
1101
1102                 r = extract_first_word(&p, &w, NULL, 0);
1103                 if (r == -ENOMEM)
1104                         return log_oom();
1105                 if (r < 0) {
1106                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1107                         return 0;
1108                 }
1109                 if (r == 0)
1110                         break;
1111
1112                 if (in_addr_from_string(AF_INET6, w, &a) >= 0) {
1113                         struct in6_addr *m;
1114
1115                         m = realloc(n->router_dns, (n->n_router_dns + 1) * sizeof(struct in6_addr));
1116                         if (!m)
1117                                 return log_oom();
1118
1119                         m[n->n_router_dns++] = a.in6;
1120                         n->router_dns = m;
1121
1122                 } else
1123                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DNS server address, ignoring: %s", w);
1124
1125         }
1126
1127         return 0;
1128 }
1129
1130 int config_parse_dhcp_server_ntp(
1131                 const char *unit,
1132                 const char *filename,
1133                 unsigned line,
1134                 const char *section,
1135                 unsigned section_line,
1136                 const char *lvalue,
1137                 int ltype,
1138                 const char *rvalue,
1139                 void *data,
1140                 void *userdata) {
1141
1142         Network *n = data;
1143         const char *p = rvalue;
1144         int r;
1145
1146         assert(filename);
1147         assert(lvalue);
1148         assert(rvalue);
1149
1150         for (;;) {
1151                 _cleanup_free_ char *w = NULL;
1152                 struct in_addr a, *m;
1153
1154                 r = extract_first_word(&p, &w, NULL, 0);
1155                 if (r == -ENOMEM)
1156                         return log_oom();
1157                 if (r < 0) {
1158                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1159                         return 0;
1160                 }
1161                 if (r == 0)
1162                         return 0;
1163
1164                 if (inet_pton(AF_INET, w, &a) <= 0) {
1165                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse NTP server address, ignoring: %s", w);
1166                         continue;
1167                 }
1168
1169                 m = realloc(n->dhcp_server_ntp, (n->n_dhcp_server_ntp + 1) * sizeof(struct in_addr));
1170                 if (!m)
1171                         return log_oom();
1172
1173                 m[n->n_dhcp_server_ntp++] = a;
1174                 n->dhcp_server_ntp = m;
1175         }
1176 }
1177
1178 int config_parse_dns(
1179                 const char *unit,
1180                 const char *filename,
1181                 unsigned line,
1182                 const char *section,
1183                 unsigned section_line,
1184                 const char *lvalue,
1185                 int ltype,
1186                 const char *rvalue,
1187                 void *data,
1188                 void *userdata) {
1189
1190         Network *n = userdata;
1191         int r;
1192
1193         assert(filename);
1194         assert(lvalue);
1195         assert(rvalue);
1196
1197         for (;;) {
1198                 _cleanup_free_ char *w = NULL;
1199                 union in_addr_union a;
1200                 struct in_addr_data *m;
1201                 int family;
1202
1203                 r = extract_first_word(&rvalue, &w, NULL, 0);
1204                 if (r == -ENOMEM)
1205                         return log_oom();
1206                 if (r < 0) {
1207                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
1208                         break;
1209                 }
1210                 if (r == 0)
1211                         break;
1212
1213                 r = in_addr_from_string_auto(w, &family, &a);
1214                 if (r < 0) {
1215                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse dns server address, ignoring: %s", w);
1216                         continue;
1217                 }
1218
1219                 m = realloc(n->dns, (n->n_dns + 1) * sizeof(struct in_addr_data));
1220                 if (!m)
1221                         return log_oom();
1222
1223                 m[n->n_dns++] = (struct in_addr_data) {
1224                         .family = family,
1225                         .address = a,
1226                 };
1227
1228                 n->dns = m;
1229         }
1230
1231         return 0;
1232 }
1233
1234 int config_parse_dnssec_negative_trust_anchors(
1235                 const char *unit,
1236                 const char *filename,
1237                 unsigned line,
1238                 const char *section,
1239                 unsigned section_line,
1240                 const char *lvalue,
1241                 int ltype,
1242                 const char *rvalue,
1243                 void *data,
1244                 void *userdata) {
1245
1246         const char *p = rvalue;
1247         Network *n = data;
1248         int r;
1249
1250         assert(n);
1251         assert(lvalue);
1252         assert(rvalue);
1253
1254         if (isempty(rvalue)) {
1255                 n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
1256                 return 0;
1257         }
1258
1259         for (;;) {
1260                 _cleanup_free_ char *w = NULL;
1261
1262                 r = extract_first_word(&p, &w, NULL, 0);
1263                 if (r < 0) {
1264                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
1265                         break;
1266                 }
1267                 if (r == 0)
1268                         break;
1269
1270                 r = dns_name_is_valid(w);
1271                 if (r <= 0) {
1272                         log_syntax(unit, LOG_ERR, filename, line, r, "%s is not a valid domain name, ignoring.", w);
1273                         continue;
1274                 }
1275
1276                 r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
1277                 if (r < 0)
1278                         return log_oom();
1279
1280                 r = set_put(n->dnssec_negative_trust_anchors, w);
1281                 if (r < 0)
1282                         return log_oom();
1283                 if (r > 0)
1284                         w = NULL;
1285         }
1286
1287         return 0;
1288 }
1289
1290 int config_parse_ntp(
1291                 const char *unit,
1292                 const char *filename,
1293                 unsigned line,
1294                 const char *section,
1295                 unsigned section_line,
1296                 const char *lvalue,
1297                 int ltype,
1298                 const char *rvalue,
1299                 void *data,
1300                 void *userdata) {
1301
1302         char ***l = data;
1303         int r;
1304
1305         assert(l);
1306         assert(lvalue);
1307         assert(rvalue);
1308
1309         if (isempty(rvalue)) {
1310                 *l = strv_free(*l);
1311                 return 0;
1312         }
1313
1314         for (;;) {
1315                 _cleanup_free_ char *w = NULL;
1316
1317                 r = extract_first_word(&rvalue, &w, NULL, 0);
1318                 if (r == -ENOMEM)
1319                         return log_oom();
1320                 if (r < 0) {
1321                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract NTP server name, ignoring: %s", rvalue);
1322                         break;
1323                 }
1324                 if (r == 0)
1325                         break;
1326
1327                 r = dns_name_is_valid_or_address(w);
1328                 if (r <= 0) {
1329                         log_syntax(unit, LOG_ERR, filename, line, r, "%s is not a valid domain name or IP address, ignoring.", w);
1330                         continue;
1331                 }
1332
1333                 r = strv_push(l, w);
1334                 if (r < 0)
1335                         return log_oom();
1336
1337                 w = NULL;
1338         }
1339
1340         return 0;
1341 }
1342
1343 int config_parse_dhcp_route_table(const char *unit,
1344                                   const char *filename,
1345                                   unsigned line,
1346                                   const char *section,
1347                                   unsigned section_line,
1348                                   const char *lvalue,
1349                                   int ltype,
1350                                   const char *rvalue,
1351                                   void *data,
1352                                   void *userdata) {
1353         uint32_t rt;
1354         int r;
1355
1356         assert(filename);
1357         assert(lvalue);
1358         assert(rvalue);
1359         assert(data);
1360
1361         r = safe_atou32(rvalue, &rt);
1362         if (r < 0) {
1363                 log_syntax(unit, LOG_ERR, filename, line, r,
1364                            "Unable to read RouteTable, ignoring assignment: %s", rvalue);
1365                 return 0;
1366         }
1367
1368         *((uint32_t *)data) = rt;
1369
1370         return 0;
1371 }
1372
1373 DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains, "Failed to parse DHCP use domains setting");
1374
1375 static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
1376         [DHCP_USE_DOMAINS_NO] = "no",
1377         [DHCP_USE_DOMAINS_ROUTE] = "route",
1378         [DHCP_USE_DOMAINS_YES] = "yes",
1379 };
1380
1381 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
1382
1383 DEFINE_CONFIG_PARSE_ENUM(config_parse_lldp_mode, lldp_mode, LLDPMode, "Failed to parse LLDP= setting.");
1384
1385 static const char* const lldp_mode_table[_LLDP_MODE_MAX] = {
1386         [LLDP_MODE_NO] = "no",
1387         [LLDP_MODE_YES] = "yes",
1388         [LLDP_MODE_ROUTERS_ONLY] = "routers-only",
1389 };
1390
1391 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(lldp_mode, LLDPMode, LLDP_MODE_YES);