src/network/networkd-network.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2013 Tom Gundersen <teg@jklm.no>
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include <ctype.h>
  22 #include <net/if.h>
  23
  24 #include "alloc-util.h"
  25 #include "conf-files.h"
  26 #include "conf-parser.h"
  27 #include "dns-domain.h"
  28 #include "fd-util.h"
  29 #include "hostname-util.h"
  30 #include "in-addr-util.h"
  31 #include "network-internal.h"
  32 #include "networkd-manager.h"
  33 #include "networkd-network.h"
  34 #include "parse-util.h"
  35 #include "set.h"
  36 #include "stat-util.h"
  37 #include "string-table.h"
  38 #include "string-util.h"
  39 #include "strv.h"
  40 #include "util.h"
  41
  42 static void network_config_hash_func(const void *p, struct siphash *state) {
  43         const NetworkConfigSection *c = p;
  44
  45         siphash24_compress(c->filename, strlen(c->filename), state);
  46         siphash24_compress(&c->line, sizeof(c->line), state);
  47 }
  48
  49 static int network_config_compare_func(const void *a, const void *b) {
  50         const NetworkConfigSection *x = a, *y = b;
  51         int r;
  52
  53         r = strcmp(x->filename, y->filename);
  54         if (r != 0)
  55                 return r;
  56
  57         return y->line - x->line;
  58 }
  59
  60 const struct hash_ops network_config_hash_ops = {
  61         .hash = network_config_hash_func,
  62         .compare = network_config_compare_func,
  63 };
  64
  65 int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s) {
  66         NetworkConfigSection *cs;
  67
  68         cs = malloc0(offsetof(NetworkConfigSection, filename) + strlen(filename) + 1);
  69         if (!cs)
  70                 return -ENOMEM;
  71
  72         strcpy(cs->filename, filename);
  73         cs->line = line;
  74
  75         *s = cs;
  76         cs = NULL;
  77
  78         return 0;
  79 }
  80
  81 void network_config_section_free(NetworkConfigSection *cs) {
  82         free(cs);
  83 }
  84
  85 /* Set defaults following RFC7844 */
  86 void network_apply_anonymize_if_set(Network *network) {
  87         if (!network->dhcp_anonymize)
  88                 return;
  89         /* RFC7844 3.7
  90          SHOULD NOT send the Host Name option */
  91         network->dhcp_send_hostname = false;
  92         /* RFC7844 section 3.:
  93          MAY contain the Client Identifier option
  94          Section 3.5:
  95          clients MUST use client identifiers based solely
  96          on the link-layer address */
  97         /* NOTE: Using MAC, as it does not reveal extra information,
  98         * and some servers might not answer if this option is not sent */
  99         network->dhcp_client_identifier = DHCP_CLIENT_ID_MAC;
 100         /* RFC 7844 3.10:
 101          SHOULD NOT use the Vendor Class Identifier option */
 102         /* NOTE: it was not initiallized to any value in network_load_one. */
 103         network->dhcp_vendor_class_identifier = false;
 104         /* RFC7844 section 3.6.:
 105          The client intending to protect its privacy SHOULD only request a
 106          minimal number of options in the PRL and SHOULD also randomly shuffle
 107          the ordering of option codes in the PRL.  If this random ordering
 108          cannot be implemented, the client MAY order the option codes in the
 109          PRL by option code number (lowest to highest).
 110         */
 111         /* NOTE: dhcp_use_mtu is false by default,
 112         * though it was not initiallized to any value in network_load_one.
 113         * Maybe there should be another var called *send*?
 114         * (to use the MTU sent by the server but to do not send
 115         * the option in the PRL). */
 116         network->dhcp_use_mtu = false;
 117         /* NOTE: when Anonymize=yes, the PRL route options are sent by default,
 118          * but this is needed to use them. */
 119         network->dhcp_use_routes = true;
 120         /* RFC7844 section 3.6.
 121         * same comments as previous option */
 122         network->dhcp_use_timezone = false;
 123 }
 124
 125 static int network_load_one(Manager *manager, const char *filename) {
 126         _cleanup_network_free_ Network *network = NULL;
 127         _cleanup_fclose_ FILE *file = NULL;
 128         char *d;
 129         const char *dropin_dirname;
 130         Route *route;
 131         Address *address;
 132         int r;
 133
 134         assert(manager);
 135         assert(filename);
 136
 137         file = fopen(filename, "re");
 138         if (!file) {
 139                 if (errno == ENOENT)
 140                         return 0;
 141
 142                 return -errno;
 143         }
 144
 145         if (null_or_empty_fd(fileno(file))) {
 146                 log_debug("Skipping empty file: %s", filename);
 147                 return 0;
 148         }
 149
 150         network = new0(Network, 1);
 151         if (!network)
 152                 return log_oom();
 153
 154         network->manager = manager;
 155
 156         LIST_HEAD_INIT(network->static_addresses);
 157         LIST_HEAD_INIT(network->static_routes);
 158         LIST_HEAD_INIT(network->static_fdb_entries);
 159         LIST_HEAD_INIT(network->ipv6_proxy_ndp_addresses);
 160         LIST_HEAD_INIT(network->address_labels);
 161         LIST_HEAD_INIT(network->static_prefixes);
 162         LIST_HEAD_INIT(network->rules);
 163
 164         network->stacked_netdevs = hashmap_new(&string_hash_ops);
 165         if (!network->stacked_netdevs)
 166                 return log_oom();
 167
 168         network->addresses_by_section = hashmap_new(&network_config_hash_ops);
 169         if (!network->addresses_by_section)
 170                 return log_oom();
 171
 172         network->routes_by_section = hashmap_new(&network_config_hash_ops);
 173         if (!network->routes_by_section)
 174                 return log_oom();
 175
 176         network->fdb_entries_by_section = hashmap_new(NULL);
 177         if (!network->fdb_entries_by_section)
 178                 return log_oom();
 179
 180         network->address_labels_by_section = hashmap_new(&network_config_hash_ops);
 181         if (!network->address_labels_by_section)
 182                 log_oom();
 183
 184         network->prefixes_by_section = hashmap_new(&network_config_hash_ops);
 185         if (!network->prefixes_by_section)
 186                 return log_oom();
 187
 188         network->rules_by_section = hashmap_new(&network_config_hash_ops);
 189         if (!network->rules_by_section)
 190                 return log_oom();
 191
 192         network->filename = strdup(filename);
 193         if (!network->filename)
 194                 return log_oom();
 195
 196         network->name = strdup(basename(filename));
 197         if (!network->name)
 198                 return log_oom();
 199
 200         d = strrchr(network->name, '.');
 201         if (!d)
 202                 return -EINVAL;
 203
 204         assert(streq(d, ".network"));
 205
 206         *d = '\0';
 207
 208         network->required_for_online = true;
 209         network->dhcp = ADDRESS_FAMILY_NO;
 210         network->dhcp_use_ntp = true;
 211         network->dhcp_use_dns = true;
 212         network->dhcp_use_hostname = true;
 213         network->dhcp_use_routes = true;
 214         /* NOTE: this var might be overwriten by network_apply_anonymize_if_set */
 215         network->dhcp_send_hostname = true;
 216         /* To enable/disable RFC7844 Anonymity Profiles */
 217         network->dhcp_anonymize = false;
 218         network->dhcp_route_metric = DHCP_ROUTE_METRIC;
 219         /* NOTE: this var might be overwrite by network_apply_anonymize_if_set */
 220         network->dhcp_client_identifier = DHCP_CLIENT_ID_DUID;
 221         network->dhcp_route_table = RT_TABLE_MAIN;
 222         network->dhcp_route_table_set = false;
 223         /* NOTE: the following vars were not set to any default,
 224          * even if they are commented in the man?
 225          * These vars might be overwriten by network_apply_anonymize_if_set */
 226         network->dhcp_vendor_class_identifier = false;
 227         /* NOTE: from man: UseMTU=... Defaults to false*/
 228         network->dhcp_use_mtu = false;
 229         /* NOTE: from man: UseTimezone=... Defaults to "no".*/
 230         network->dhcp_use_timezone = false;
 231         network->rapid_commit = true;
 232
 233         network->dhcp_server_emit_dns = true;
 234         network->dhcp_server_emit_ntp = true;
 235         network->dhcp_server_emit_router = true;
 236         network->dhcp_server_emit_timezone = true;
 237
 238         network->router_emit_dns = true;
 239         network->router_emit_domains = true;
 240
 241         network->use_bpdu = true;
 242         network->allow_port_to_be_root = true;
 243         network->unicast_flood = true;
 244         network->priority = LINK_BRIDGE_PORT_PRIORITY_INVALID;
 245
 246         network->lldp_mode = LLDP_MODE_ROUTERS_ONLY;
 247
 248         network->llmnr = RESOLVE_SUPPORT_YES;
 249         network->mdns = RESOLVE_SUPPORT_NO;
 250         network->dnssec_mode = _DNSSEC_MODE_INVALID;
 251
 252         network->link_local = ADDRESS_FAMILY_IPV6;
 253
 254         network->ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
 255         network->ipv6_accept_ra = -1;
 256         network->ipv6_dad_transmits = -1;
 257         network->ipv6_hop_limit = -1;
 258         network->ipv6_proxy_ndp = -1;
 259         network->duid.type = _DUID_TYPE_INVALID;
 260         network->proxy_arp = -1;
 261         network->arp = -1;
 262         network->ipv6_accept_ra_use_dns = true;
 263         network->ipv6_accept_ra_route_table = RT_TABLE_MAIN;
 264
 265         dropin_dirname = strjoina(network->name, ".network.d");
 266
 267         r = config_parse_many(filename, network_dirs, dropin_dirname,
 268                               "Match\0"
 269                               "Link\0"
 270                               "Network\0"
 271                               "Address\0"
 272                               "IPv6AddressLabel\0"
 273                               "RoutingPolicyRule\0"
 274                               "Route\0"
 275                               "DHCP\0"
 276                               "DHCPv4\0" /* compat */
 277                               "DHCPServer\0"
 278                               "IPv6AcceptRA\0"
 279                               "IPv6NDPProxyAddress\0"
 280                               "Bridge\0"
 281                               "BridgeFDB\0"
 282                               "BridgeVLAN\0"
 283                               "IPv6PrefixDelegation\0"
 284                               "IPv6Prefix\0",
 285                               config_item_perf_lookup, network_network_gperf_lookup,
 286                               CONFIG_PARSE_WARN, network);
 287         if (r < 0)
 288                 return r;
 289
 290         network_apply_anonymize_if_set(network);
 291
 292         /* IPMasquerade=yes implies IPForward=yes */
 293         if (network->ip_masquerade)
 294                 network->ip_forward |= ADDRESS_FAMILY_IPV4;
 295
 296         LIST_PREPEND(networks, manager->networks, network);
 297
 298         r = hashmap_ensure_allocated(&manager->networks_by_name, &string_hash_ops);
 299         if (r < 0)
 300                 return r;
 301
 302         r = hashmap_put(manager->networks_by_name, network->name, network);
 303         if (r < 0)
 304                 return r;
 305
 306         LIST_FOREACH(routes, route, network->static_routes) {
 307                 if (!route->family) {
 308                         log_warning("Route section without Gateway field configured in %s. "
 309                                     "Ignoring", filename);
 310                         return 0;
 311                 }
 312         }
 313
 314         LIST_FOREACH(addresses, address, network->static_addresses) {
 315                 if (!address->family) {
 316                         log_warning("Address section without Address field configured in %s. "
 317                                     "Ignoring", filename);
 318                         return 0;
 319                 }
 320         }
 321
 322         network = NULL;
 323
 324         return 0;
 325 }
 326
 327 int network_load(Manager *manager) {
 328         Network *network;
 329         _cleanup_strv_free_ char **files = NULL;
 330         char **f;
 331         int r;
 332
 333         assert(manager);
 334
 335         while ((network = manager->networks))
 336                 network_free(network);
 337
 338         r = conf_files_list_strv(&files, ".network", NULL, 0, network_dirs);
 339         if (r < 0)
 340                 return log_error_errno(r, "Failed to enumerate network files: %m");
 341
 342         STRV_FOREACH_BACKWARDS(f, files) {
 343                 r = network_load_one(manager, *f);
 344                 if (r < 0)
 345                         return r;
 346         }
 347
 348         return 0;
 349 }
 350
 351 void network_free(Network *network) {
 352         IPv6ProxyNDPAddress *ipv6_proxy_ndp_address;
 353         RoutingPolicyRule *rule;
 354         FdbEntry *fdb_entry;
 355         AddressLabel *label;
 356         Prefix *prefix;
 357         Address *address;
 358         NetDev *netdev;
 359         Route *route;
 360         Iterator i;
 361
 362         if (!network)
 363                 return;
 364
 365         free(network->filename);
 366
 367         free(network->match_mac);
 368         strv_free(network->match_path);
 369         strv_free(network->match_driver);
 370         strv_free(network->match_type);
 371         strv_free(network->match_name);
 372
 373         free(network->description);
 374         free(network->dhcp_vendor_class_identifier);
 375         free(network->dhcp_hostname);
 376
 377         free(network->mac);
 378
 379         strv_free(network->ntp);
 380         free(network->dns);
 381         strv_free(network->search_domains);
 382         strv_free(network->route_domains);
 383         strv_free(network->bind_carrier);
 384
 385         netdev_unref(network->bridge);
 386         netdev_unref(network->bond);
 387         netdev_unref(network->vrf);
 388
 389         HASHMAP_FOREACH(netdev, network->stacked_netdevs, i) {
 390                 hashmap_remove(network->stacked_netdevs, netdev->ifname);
 391                 netdev_unref(netdev);
 392         }
 393         hashmap_free(network->stacked_netdevs);
 394
 395         while ((route = network->static_routes))
 396                 route_free(route);
 397
 398         while ((address = network->static_addresses))
 399                 address_free(address);
 400
 401         while ((fdb_entry = network->static_fdb_entries))
 402                 fdb_entry_free(fdb_entry);
 403
 404         while ((ipv6_proxy_ndp_address = network->ipv6_proxy_ndp_addresses))
 405                 ipv6_proxy_ndp_address_free(ipv6_proxy_ndp_address);
 406
 407         while ((label = network->address_labels))
 408                 address_label_free(label);
 409
 410         while ((prefix = network->static_prefixes))
 411                 prefix_free(prefix);
 412
 413         while ((rule = network->rules))
 414                 routing_policy_rule_free(rule);
 415
 416         hashmap_free(network->addresses_by_section);
 417         hashmap_free(network->routes_by_section);
 418         hashmap_free(network->fdb_entries_by_section);
 419         hashmap_free(network->address_labels_by_section);
 420         hashmap_free(network->prefixes_by_section);
 421         hashmap_free(network->rules_by_section);
 422
 423         if (network->manager) {
 424                 if (network->manager->networks)
 425                         LIST_REMOVE(networks, network->manager->networks, network);
 426
 427                 if (network->manager->networks_by_name)
 428                         hashmap_remove(network->manager->networks_by_name, network->name);
 429         }
 430
 431         free(network->name);
 432
 433         condition_free_list(network->match_host);
 434         condition_free_list(network->match_virt);
 435         condition_free_list(network->match_kernel_cmdline);
 436         condition_free_list(network->match_kernel_version);
 437         condition_free_list(network->match_arch);
 438
 439         free(network->dhcp_server_timezone);
 440         free(network->dhcp_server_dns);
 441         free(network->dhcp_server_ntp);
 442
 443         set_free_free(network->dnssec_negative_trust_anchors);
 444
 445         free(network);
 446 }
 447
 448 int network_get_by_name(Manager *manager, const char *name, Network **ret) {
 449         Network *network;
 450
 451         assert(manager);
 452         assert(name);
 453         assert(ret);
 454
 455         network = hashmap_get(manager->networks_by_name, name);
 456         if (!network)
 457                 return -ENOENT;
 458
 459         *ret = network;
 460
 461         return 0;
 462 }
 463
 464 int network_get(Manager *manager, struct udev_device *device,
 465                 const char *ifname, const struct ether_addr *address,
 466                 Network **ret) {
 467         Network *network;
 468         struct udev_device *parent;
 469         const char *path = NULL, *parent_driver = NULL, *driver = NULL, *devtype = NULL;
 470
 471         assert(manager);
 472         assert(ret);
 473
 474         if (device) {
 475                 path = udev_device_get_property_value(device, "ID_PATH");
 476
 477                 parent = udev_device_get_parent(device);
 478                 if (parent)
 479                         parent_driver = udev_device_get_driver(parent);
 480
 481                 driver = udev_device_get_property_value(device, "ID_NET_DRIVER");
 482
 483                 devtype = udev_device_get_devtype(device);
 484         }
 485
 486         LIST_FOREACH(networks, network, manager->networks) {
 487                 if (net_match_config(network->match_mac, network->match_path,
 488                                      network->match_driver, network->match_type,
 489                                      network->match_name, network->match_host,
 490                                      network->match_virt, network->match_kernel_cmdline,
 491                                      network->match_kernel_version, network->match_arch,
 492                                      address, path, parent_driver, driver,
 493                                      devtype, ifname)) {
 494                         if (network->match_name && device) {
 495                                 const char *attr;
 496                                 uint8_t name_assign_type = NET_NAME_UNKNOWN;
 497
 498                                 attr = udev_device_get_sysattr_value(device, "name_assign_type");
 499                                 if (attr)
 500                                         (void) safe_atou8(attr, &name_assign_type);
 501
 502                                 if (name_assign_type == NET_NAME_ENUM)
 503                                         log_warning("%s: found matching network '%s', based on potentially unpredictable ifname",
 504                                                     ifname, network->filename);
 505                                 else
 506                                         log_debug("%s: found matching network '%s'", ifname, network->filename);
 507                         } else
 508                                 log_debug("%s: found matching network '%s'", ifname, network->filename);
 509
 510                         *ret = network;
 511                         return 0;
 512                 }
 513         }
 514
 515         *ret = NULL;
 516
 517         return -ENOENT;
 518 }
 519
 520 int network_apply(Network *network, Link *link) {
 521         int r;
 522
 523         assert(network);
 524         assert(link);
 525
 526         link->network = network;
 527
 528         if (network->ipv4ll_route) {
 529                 Route *route;
 530
 531                 r = route_new_static(network, NULL, 0, &route);
 532                 if (r < 0)
 533                         return r;
 534
 535                 r = inet_pton(AF_INET, "169.254.0.0", &route->dst.in);
 536                 if (r == 0)
 537                         return -EINVAL;
 538                 if (r < 0)
 539                         return -errno;
 540
 541                 route->family = AF_INET;
 542                 route->dst_prefixlen = 16;
 543                 route->scope = RT_SCOPE_LINK;
 544                 route->priority = IPV4LL_ROUTE_METRIC;
 545                 route->protocol = RTPROT_STATIC;
 546         }
 547
 548         if (network->n_dns > 0 ||
 549             !strv_isempty(network->ntp) ||
 550             !strv_isempty(network->search_domains) ||
 551             !strv_isempty(network->route_domains))
 552                 link_dirty(link);
 553
 554         return 0;
 555 }
 556
 557 bool network_has_static_ipv6_addresses(Network *network) {
 558         Address *address;
 559
 560         assert(network);
 561
 562         LIST_FOREACH(addresses, address, network->static_addresses) {
 563                 if (address->family == AF_INET6)
 564                         return true;
 565         }
 566
 567         return false;
 568 }
 569
 570 int config_parse_netdev(const char *unit,
 571                 const char *filename,
 572                 unsigned line,
 573                 const char *section,
 574                 unsigned section_line,
 575                 const char *lvalue,
 576                 int ltype,
 577                 const char *rvalue,
 578                 void *data,
 579                 void *userdata) {
 580         Network *network = userdata;
 581         _cleanup_free_ char *kind_string = NULL;
 582         char *p;
 583         NetDev *netdev;
 584         NetDevKind kind;
 585         int r;
 586
 587         assert(filename);
 588         assert(lvalue);
 589         assert(rvalue);
 590         assert(data);
 591
 592         kind_string = strdup(lvalue);
 593         if (!kind_string)
 594                 return log_oom();
 595
 596         /* the keys are CamelCase versions of the kind */
 597         for (p = kind_string; *p; p++)
 598                 *p = tolower(*p);
 599
 600         kind = netdev_kind_from_string(kind_string);
 601         if (kind == _NETDEV_KIND_INVALID) {
 602                 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid NetDev kind: %s", lvalue);
 603                 return 0;
 604         }
 605
 606         r = netdev_get(network->manager, rvalue, &netdev);
 607         if (r < 0) {
 608                 log_syntax(unit, LOG_ERR, filename, line, r, "%s could not be found, ignoring assignment: %s", lvalue, rvalue);
 609                 return 0;
 610         }
 611
 612         if (netdev->kind != kind) {
 613                 log_syntax(unit, LOG_ERR, filename, line, 0, "NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue);
 614                 return 0;
 615         }
 616
 617         switch (kind) {
 618         case NETDEV_KIND_BRIDGE:
 619                 network->bridge = netdev;
 620
 621                 break;
 622         case NETDEV_KIND_BOND:
 623                 network->bond = netdev;
 624
 625                 break;
 626         case NETDEV_KIND_VRF:
 627                 network->vrf = netdev;
 628
 629                 break;
 630         case NETDEV_KIND_VLAN:
 631         case NETDEV_KIND_MACVLAN:
 632         case NETDEV_KIND_MACVTAP:
 633         case NETDEV_KIND_IPVLAN:
 634         case NETDEV_KIND_VXLAN:
 635         case NETDEV_KIND_VCAN:
 636                 r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
 637                 if (r < 0) {
 638                         log_syntax(unit, LOG_ERR, filename, line, r, "Cannot add NetDev '%s' to network: %m", rvalue);
 639                         return 0;
 640                 }
 641
 642                 break;
 643         default:
 644                 assert_not_reached("Cannot parse NetDev");
 645         }
 646
 647         netdev_ref(netdev);
 648
 649         return 0;
 650 }
 651
 652 int config_parse_domains(
 653                 const char *unit,
 654                 const char *filename,
 655                 unsigned line,
 656                 const char *section,
 657                 unsigned section_line,
 658                 const char *lvalue,
 659                 int ltype,
 660                 const char *rvalue,
 661                 void *data,
 662                 void *userdata) {
 663
 664         const char *p;
 665         Network *n = data;
 666         int r;
 667
 668         assert(n);
 669         assert(lvalue);
 670         assert(rvalue);
 671
 672         if (isempty(rvalue)) {
 673                 n->search_domains = strv_free(n->search_domains);
 674                 n->route_domains = strv_free(n->route_domains);
 675                 return 0;
 676         }
 677
 678         p = rvalue;
 679         for (;;) {
 680                 _cleanup_free_ char *w = NULL, *normalized = NULL;
 681                 const char *domain;
 682                 bool is_route;
 683
 684                 r = extract_first_word(&p, &w, NULL, 0);
 685                 if (r < 0) {
 686                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract search or route domain, ignoring: %s", rvalue);
 687                         break;
 688                 }
 689                 if (r == 0)
 690                         break;
 691
 692                 is_route = w[0] == '~';
 693                 domain = is_route ? w + 1 : w;
 694
 695                 if (dns_name_is_root(domain) || streq(domain, "*")) {
 696                         /* If the root domain appears as is, or the special token "*" is found, we'll consider this as
 697                          * routing domain, unconditionally. */
 698                         is_route = true;
 699                         domain = "."; /* make sure we don't allow empty strings, thus write the root domain as "." */
 700
 701                 } else {
 702                         r = dns_name_normalize(domain, &normalized);
 703                         if (r < 0) {
 704                                 log_syntax(unit, LOG_ERR, filename, line, r, "'%s' is not a valid domain name, ignoring.", domain);
 705                                 continue;
 706                         }
 707
 708                         domain = normalized;
 709
 710                         if (is_localhost(domain)) {
 711                                 log_syntax(unit, LOG_ERR, filename, line, 0, "'localhost' domain names may not be configure as search or route domains, ignoring assignment: %s", domain);
 712                                 continue;
 713                         }
 714                 }
 715
 716                 if (is_route) {
 717                         r = strv_extend(&n->route_domains, domain);
 718                         if (r < 0)
 719                                 return log_oom();
 720
 721                 } else {
 722                         r = strv_extend(&n->search_domains, domain);
 723                         if (r < 0)
 724                                 return log_oom();
 725                 }
 726         }
 727
 728         strv_uniq(n->route_domains);
 729         strv_uniq(n->search_domains);
 730
 731         return 0;
 732 }
 733
 734 int config_parse_tunnel(const char *unit,
 735                         const char *filename,
 736                         unsigned line,
 737                         const char *section,
 738                         unsigned section_line,
 739                         const char *lvalue,
 740                         int ltype,
 741                         const char *rvalue,
 742                         void *data,
 743                         void *userdata) {
 744         Network *network = userdata;
 745         NetDev *netdev;
 746         int r;
 747
 748         assert(filename);
 749         assert(lvalue);
 750         assert(rvalue);
 751         assert(data);
 752
 753         r = netdev_get(network->manager, rvalue, &netdev);
 754         if (r < 0) {
 755                 log_syntax(unit, LOG_ERR, filename, line, r, "Tunnel is invalid, ignoring assignment: %s", rvalue);
 756                 return 0;
 757         }
 758
 759         if (!IN_SET(netdev->kind,
 760                     NETDEV_KIND_IPIP,
 761                     NETDEV_KIND_SIT,
 762                     NETDEV_KIND_GRE,
 763                     NETDEV_KIND_GRETAP,
 764                     NETDEV_KIND_IP6GRE,
 765                     NETDEV_KIND_IP6GRETAP,
 766                     NETDEV_KIND_VTI,
 767                     NETDEV_KIND_VTI6,
 768                     NETDEV_KIND_IP6TNL)) {
 769                 log_syntax(unit, LOG_ERR, filename, line, 0,
 770                            "NetDev is not a tunnel, ignoring assignment: %s", rvalue);
 771                 return 0;
 772         }
 773
 774         r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
 775         if (r < 0) {
 776                 log_syntax(unit, LOG_ERR, filename, line, r, "Cannot add VLAN '%s' to network, ignoring: %m", rvalue);
 777                 return 0;
 778         }
 779
 780         netdev_ref(netdev);
 781
 782         return 0;
 783 }
 784
 785 int config_parse_ipv4ll(
 786                 const char* unit,
 787                 const char *filename,
 788                 unsigned line,
 789                 const char *section,
 790                 unsigned section_line,
 791                 const char *lvalue,
 792                 int ltype,
 793                 const char *rvalue,
 794                 void *data,
 795                 void *userdata) {
 796
 797         AddressFamilyBoolean *link_local = data;
 798
 799         assert(filename);
 800         assert(lvalue);
 801         assert(rvalue);
 802         assert(data);
 803
 804         /* Note that this is mostly like
 805          * config_parse_address_family_boolean(), except that it
 806          * applies only to IPv4 */
 807
 808         SET_FLAG(*link_local, ADDRESS_FAMILY_IPV4, parse_boolean(rvalue));
 809
 810         return 0;
 811 }
 812
 813 int config_parse_dhcp(
 814                 const char* unit,
 815                 const char *filename,
 816                 unsigned line,
 817                 const char *section,
 818                 unsigned section_line,
 819                 const char *lvalue,
 820                 int ltype,
 821                 const char *rvalue,
 822                 void *data,
 823                 void *userdata) {
 824
 825         AddressFamilyBoolean *dhcp = data, s;
 826
 827         assert(filename);
 828         assert(lvalue);
 829         assert(rvalue);
 830         assert(data);
 831
 832         /* Note that this is mostly like
 833          * config_parse_address_family_boolean(), except that it
 834          * understands some old names for the enum values */
 835
 836         s = address_family_boolean_from_string(rvalue);
 837         if (s < 0) {
 838
 839                 /* Previously, we had a slightly different enum here,
 840                  * support its values for compatbility. */
 841
 842                 if (streq(rvalue, "none"))
 843                         s = ADDRESS_FAMILY_NO;
 844                 else if (streq(rvalue, "v4"))
 845                         s = ADDRESS_FAMILY_IPV4;
 846                 else if (streq(rvalue, "v6"))
 847                         s = ADDRESS_FAMILY_IPV6;
 848                 else if (streq(rvalue, "both"))
 849                         s = ADDRESS_FAMILY_YES;
 850                 else {
 851                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DHCP option, ignoring: %s", rvalue);
 852                         return 0;
 853                 }
 854         }
 855
 856         *dhcp = s;
 857         return 0;
 858 }
 859
 860 static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = {
 861         [DHCP_CLIENT_ID_MAC] = "mac",
 862         [DHCP_CLIENT_ID_DUID] = "duid"
 863 };
 864
 865 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_client_identifier, DHCPClientIdentifier);
 866 DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_client_identifier, dhcp_client_identifier, DHCPClientIdentifier, "Failed to parse client identifier type");
 867
 868 int config_parse_ipv6token(
 869                 const char* unit,
 870                 const char *filename,
 871                 unsigned line,
 872                 const char *section,
 873                 unsigned section_line,
 874                 const char *lvalue,
 875                 int ltype,
 876                 const char *rvalue,
 877                 void *data,
 878                 void *userdata) {
 879
 880         union in_addr_union buffer;
 881         struct in6_addr *token = data;
 882         int r;
 883
 884         assert(filename);
 885         assert(lvalue);
 886         assert(rvalue);
 887         assert(token);
 888
 889         r = in_addr_from_string(AF_INET6, rvalue, &buffer);
 890         if (r < 0) {
 891                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse IPv6 token, ignoring: %s", rvalue);
 892                 return 0;
 893         }
 894
 895         r = in_addr_is_null(AF_INET6, &buffer);
 896         if (r != 0) {
 897                 log_syntax(unit, LOG_ERR, filename, line, r, "IPv6 token cannot be the ANY address, ignoring: %s", rvalue);
 898                 return 0;
 899         }
 900
 901         if ((buffer.in6.s6_addr32[0] | buffer.in6.s6_addr32[1]) != 0) {
 902                 log_syntax(unit, LOG_ERR, filename, line, 0, "IPv6 token cannot be longer than 64 bits, ignoring: %s", rvalue);
 903                 return 0;
 904         }
 905
 906         *token = buffer.in6;
 907
 908         return 0;
 909 }
 910
 911 static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
 912         [IPV6_PRIVACY_EXTENSIONS_NO] = "no",
 913         [IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "prefer-public",
 914         [IPV6_PRIVACY_EXTENSIONS_YES] = "yes",
 915 };
 916
 917 DEFINE_STRING_TABLE_LOOKUP(ipv6_privacy_extensions, IPv6PrivacyExtensions);
 918
 919 int config_parse_ipv6_privacy_extensions(
 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         IPv6PrivacyExtensions *ipv6_privacy_extensions = data;
 932         int k;
 933
 934         assert(filename);
 935         assert(lvalue);
 936         assert(rvalue);
 937         assert(ipv6_privacy_extensions);
 938
 939         /* Our enum shall be a superset of booleans, hence first try
 940          * to parse as boolean, and then as enum */
 941
 942         k = parse_boolean(rvalue);
 943         if (k > 0)
 944                 *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_YES;
 945         else if (k == 0)
 946                 *ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
 947         else {
 948                 IPv6PrivacyExtensions s;
 949
 950                 s = ipv6_privacy_extensions_from_string(rvalue);
 951                 if (s < 0) {
 952
 953                         if (streq(rvalue, "kernel"))
 954                                 s = _IPV6_PRIVACY_EXTENSIONS_INVALID;
 955                         else {
 956                                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
 957                                 return 0;
 958                         }
 959                 }
 960
 961                 *ipv6_privacy_extensions = s;
 962         }
 963
 964         return 0;
 965 }
 966
 967 int config_parse_hostname(
 968                 const char *unit,
 969                 const char *filename,
 970                 unsigned line,
 971                 const char *section,
 972                 unsigned section_line,
 973                 const char *lvalue,
 974                 int ltype,
 975                 const char *rvalue,
 976                 void *data,
 977                 void *userdata) {
 978
 979         char **hostname = data, *hn = NULL;
 980         int r;
 981
 982         assert(filename);
 983         assert(lvalue);
 984         assert(rvalue);
 985
 986         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &hn, userdata);
 987         if (r < 0)
 988                 return r;
 989
 990         if (!hostname_is_valid(hn, false)) {
 991                 log_syntax(unit, LOG_ERR, filename, line, 0, "Hostname is not valid, ignoring assignment: %s", rvalue);
 992                 free(hn);
 993                 return 0;
 994         }
 995
 996         free(*hostname);
 997         *hostname = hostname_cleanup(hn);
 998         return 0;
 999 }
1000
1001 int config_parse_timezone(
1002                 const char *unit,
1003                 const char *filename,
1004                 unsigned line,
1005                 const char *section,
1006                 unsigned section_line,
1007                 const char *lvalue,
1008                 int ltype,
1009                 const char *rvalue,
1010                 void *data,
1011                 void *userdata) {
1012
1013         char **datap = data, *tz = NULL;
1014         int r;
1015
1016         assert(filename);
1017         assert(lvalue);
1018         assert(rvalue);
1019
1020         r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &tz, userdata);
1021         if (r < 0)
1022                 return r;
1023
1024         if (!timezone_is_valid(tz)) {
1025                 log_syntax(unit, LOG_ERR, filename, line, 0, "Timezone is not valid, ignoring assignment: %s", rvalue);
1026                 free(tz);
1027                 return 0;
1028         }
1029
1030         free(*datap);
1031         *datap = tz;
1032
1033         return 0;
1034 }
1035
1036 int config_parse_dhcp_server_dns(
1037                 const char *unit,
1038                 const char *filename,
1039                 unsigned line,
1040                 const char *section,
1041                 unsigned section_line,
1042                 const char *lvalue,
1043                 int ltype,
1044                 const char *rvalue,
1045                 void *data,
1046                 void *userdata) {
1047
1048         Network *n = data;
1049         const char *p = rvalue;
1050         int r;
1051
1052         assert(filename);
1053         assert(lvalue);
1054         assert(rvalue);
1055
1056         for (;;) {
1057                 _cleanup_free_ char *w = NULL;
1058                 struct in_addr a, *m;
1059
1060                 r = extract_first_word(&p, &w, NULL, 0);
1061                 if (r == -ENOMEM)
1062                         return log_oom();
1063                 if (r < 0) {
1064                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1065                         return 0;
1066                 }
1067                 if (r == 0)
1068                         break;
1069
1070                 if (inet_pton(AF_INET, w, &a) <= 0) {
1071                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DNS server address, ignoring: %s", w);
1072                         continue;
1073                 }
1074
1075                 m = realloc(n->dhcp_server_dns, (n->n_dhcp_server_dns + 1) * sizeof(struct in_addr));
1076                 if (!m)
1077                         return log_oom();
1078
1079                 m[n->n_dhcp_server_dns++] = a;
1080                 n->dhcp_server_dns = m;
1081         }
1082
1083         return 0;
1084 }
1085
1086 int config_parse_radv_dns(
1087                 const char *unit,
1088                 const char *filename,
1089                 unsigned line,
1090                 const char *section,
1091                 unsigned section_line,
1092                 const char *lvalue,
1093                 int ltype,
1094                 const char *rvalue,
1095                 void *data,
1096                 void *userdata) {
1097
1098         Network *n = data;
1099         const char *p = rvalue;
1100         int r;
1101
1102         assert(filename);
1103         assert(lvalue);
1104         assert(rvalue);
1105
1106         for (;;) {
1107                 _cleanup_free_ char *w = NULL;
1108                 union in_addr_union a;
1109
1110                 r = extract_first_word(&p, &w, NULL, 0);
1111                 if (r == -ENOMEM)
1112                         return log_oom();
1113                 if (r < 0) {
1114                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1115                         return 0;
1116                 }
1117                 if (r == 0)
1118                         break;
1119
1120                 if (in_addr_from_string(AF_INET6, w, &a) >= 0) {
1121                         struct in6_addr *m;
1122
1123                         m = realloc(n->router_dns, (n->n_router_dns + 1) * sizeof(struct in6_addr));
1124                         if (!m)
1125                                 return log_oom();
1126
1127                         m[n->n_router_dns++] = a.in6;
1128                         n->router_dns = m;
1129
1130                 } else
1131                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse DNS server address, ignoring: %s", w);
1132
1133         }
1134
1135         return 0;
1136 }
1137
1138 int config_parse_radv_search_domains(
1139                 const char *unit,
1140                 const char *filename,
1141                 unsigned line,
1142                 const char *section,
1143                 unsigned section_line,
1144                 const char *lvalue,
1145                 int ltype,
1146                 const char *rvalue,
1147                 void *data,
1148                 void *userdata) {
1149
1150         Network *n = data;
1151         const char *p = rvalue;
1152         int r;
1153
1154         assert(filename);
1155         assert(lvalue);
1156         assert(rvalue);
1157
1158         for (;;) {
1159                 _cleanup_free_ char *w = NULL;
1160                 _cleanup_free_ char *idna = NULL;
1161
1162                 r = extract_first_word(&p, &w, NULL, 0);
1163                 if (r == -ENOMEM)
1164                         return log_oom();
1165                 if (r < 0) {
1166                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1167                         return 0;
1168                 }
1169                 if (r == 0)
1170                         break;
1171
1172                 r = dns_name_apply_idna(w, &idna);
1173                 if (r > 0) {
1174                         r = strv_push(&n->router_search_domains, idna);
1175                         if (r >= 0)
1176                                 idna = NULL;
1177                 } else if (r == 0) {
1178                         r = strv_push(&n->router_search_domains, w);
1179                         if (r >= 0)
1180                                 w = NULL;
1181                 }
1182         }
1183
1184         return 0;
1185 }
1186
1187 int config_parse_dhcp_server_ntp(
1188                 const char *unit,
1189                 const char *filename,
1190                 unsigned line,
1191                 const char *section,
1192                 unsigned section_line,
1193                 const char *lvalue,
1194                 int ltype,
1195                 const char *rvalue,
1196                 void *data,
1197                 void *userdata) {
1198
1199         Network *n = data;
1200         const char *p = rvalue;
1201         int r;
1202
1203         assert(filename);
1204         assert(lvalue);
1205         assert(rvalue);
1206
1207         for (;;) {
1208                 _cleanup_free_ char *w = NULL;
1209                 struct in_addr a, *m;
1210
1211                 r = extract_first_word(&p, &w, NULL, 0);
1212                 if (r == -ENOMEM)
1213                         return log_oom();
1214                 if (r < 0) {
1215                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
1216                         return 0;
1217                 }
1218                 if (r == 0)
1219                         return 0;
1220
1221                 if (inet_pton(AF_INET, w, &a) <= 0) {
1222                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse NTP server address, ignoring: %s", w);
1223                         continue;
1224                 }
1225
1226                 m = realloc(n->dhcp_server_ntp, (n->n_dhcp_server_ntp + 1) * sizeof(struct in_addr));
1227                 if (!m)
1228                         return log_oom();
1229
1230                 m[n->n_dhcp_server_ntp++] = a;
1231                 n->dhcp_server_ntp = m;
1232         }
1233 }
1234
1235 int config_parse_dns(
1236                 const char *unit,
1237                 const char *filename,
1238                 unsigned line,
1239                 const char *section,
1240                 unsigned section_line,
1241                 const char *lvalue,
1242                 int ltype,
1243                 const char *rvalue,
1244                 void *data,
1245                 void *userdata) {
1246
1247         Network *n = userdata;
1248         int r;
1249
1250         assert(filename);
1251         assert(lvalue);
1252         assert(rvalue);
1253
1254         for (;;) {
1255                 _cleanup_free_ char *w = NULL;
1256                 union in_addr_union a;
1257                 struct in_addr_data *m;
1258                 int family;
1259
1260                 r = extract_first_word(&rvalue, &w, NULL, 0);
1261                 if (r == -ENOMEM)
1262                         return log_oom();
1263                 if (r < 0) {
1264                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
1265                         break;
1266                 }
1267                 if (r == 0)
1268                         break;
1269
1270                 r = in_addr_from_string_auto(w, &family, &a);
1271                 if (r < 0) {
1272                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse dns server address, ignoring: %s", w);
1273                         continue;
1274                 }
1275
1276                 m = realloc(n->dns, (n->n_dns + 1) * sizeof(struct in_addr_data));
1277                 if (!m)
1278                         return log_oom();
1279
1280                 m[n->n_dns++] = (struct in_addr_data) {
1281                         .family = family,
1282                         .address = a,
1283                 };
1284
1285                 n->dns = m;
1286         }
1287
1288         return 0;
1289 }
1290
1291 int config_parse_dnssec_negative_trust_anchors(
1292                 const char *unit,
1293                 const char *filename,
1294                 unsigned line,
1295                 const char *section,
1296                 unsigned section_line,
1297                 const char *lvalue,
1298                 int ltype,
1299                 const char *rvalue,
1300                 void *data,
1301                 void *userdata) {
1302
1303         const char *p = rvalue;
1304         Network *n = data;
1305         int r;
1306
1307         assert(n);
1308         assert(lvalue);
1309         assert(rvalue);
1310
1311         if (isempty(rvalue)) {
1312                 n->dnssec_negative_trust_anchors = set_free_free(n->dnssec_negative_trust_anchors);
1313                 return 0;
1314         }
1315
1316         for (;;) {
1317                 _cleanup_free_ char *w = NULL;
1318
1319                 r = extract_first_word(&p, &w, NULL, 0);
1320                 if (r < 0) {
1321                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract negative trust anchor domain, ignoring: %s", rvalue);
1322                         break;
1323                 }
1324                 if (r == 0)
1325                         break;
1326
1327                 r = dns_name_is_valid(w);
1328                 if (r <= 0) {
1329                         log_syntax(unit, LOG_ERR, filename, line, r, "%s is not a valid domain name, ignoring.", w);
1330                         continue;
1331                 }
1332
1333                 r = set_ensure_allocated(&n->dnssec_negative_trust_anchors, &dns_name_hash_ops);
1334                 if (r < 0)
1335                         return log_oom();
1336
1337                 r = set_put(n->dnssec_negative_trust_anchors, w);
1338                 if (r < 0)
1339                         return log_oom();
1340                 if (r > 0)
1341                         w = NULL;
1342         }
1343
1344         return 0;
1345 }
1346
1347 int config_parse_ntp(
1348                 const char *unit,
1349                 const char *filename,
1350                 unsigned line,
1351                 const char *section,
1352                 unsigned section_line,
1353                 const char *lvalue,
1354                 int ltype,
1355                 const char *rvalue,
1356                 void *data,
1357                 void *userdata) {
1358
1359         char ***l = data;
1360         int r;
1361
1362         assert(l);
1363         assert(lvalue);
1364         assert(rvalue);
1365
1366         if (isempty(rvalue)) {
1367                 *l = strv_free(*l);
1368                 return 0;
1369         }
1370
1371         for (;;) {
1372                 _cleanup_free_ char *w = NULL;
1373
1374                 r = extract_first_word(&rvalue, &w, NULL, 0);
1375                 if (r == -ENOMEM)
1376                         return log_oom();
1377                 if (r < 0) {
1378                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract NTP server name, ignoring: %s", rvalue);
1379                         break;
1380                 }
1381                 if (r == 0)
1382                         break;
1383
1384                 r = dns_name_is_valid_or_address(w);
1385                 if (r <= 0) {
1386                         log_syntax(unit, LOG_ERR, filename, line, r, "%s is not a valid domain name or IP address, ignoring.", w);
1387                         continue;
1388                 }
1389
1390                 r = strv_push(l, w);
1391                 if (r < 0)
1392                         return log_oom();
1393
1394                 w = NULL;
1395         }
1396
1397         return 0;
1398 }
1399
1400 int config_parse_dhcp_route_table(const char *unit,
1401                                   const char *filename,
1402                                   unsigned line,
1403                                   const char *section,
1404                                   unsigned section_line,
1405                                   const char *lvalue,
1406                                   int ltype,
1407                                   const char *rvalue,
1408                                   void *data,
1409                                   void *userdata) {
1410         Network *network = data;
1411         uint32_t rt;
1412         int r;
1413
1414         assert(filename);
1415         assert(lvalue);
1416         assert(rvalue);
1417         assert(data);
1418
1419         r = safe_atou32(rvalue, &rt);
1420         if (r < 0) {
1421                 log_syntax(unit, LOG_ERR, filename, line, r,
1422                            "Unable to read RouteTable, ignoring assignment: %s", rvalue);
1423                 return 0;
1424         }
1425
1426         network->dhcp_route_table = rt;
1427         network->dhcp_route_table_set = true;
1428
1429         return 0;
1430 }
1431
1432 DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains, "Failed to parse DHCP use domains setting");
1433
1434 static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
1435         [DHCP_USE_DOMAINS_NO] = "no",
1436         [DHCP_USE_DOMAINS_ROUTE] = "route",
1437         [DHCP_USE_DOMAINS_YES] = "yes",
1438 };
1439
1440 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
1441
1442 DEFINE_CONFIG_PARSE_ENUM(config_parse_lldp_mode, lldp_mode, LLDPMode, "Failed to parse LLDP= setting.");
1443
1444 static const char* const lldp_mode_table[_LLDP_MODE_MAX] = {
1445         [LLDP_MODE_NO] = "no",
1446         [LLDP_MODE_YES] = "yes",
1447         [LLDP_MODE_ROUTERS_ONLY] = "routers-only",
1448 };
1449
1450 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(lldp_mode, LLDPMode, LLDP_MODE_YES);