src/network/networkd-address.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4
   5 #include "alloc-util.h"
   6 #include "conf-parser.h"
   7 #include "firewall-util.h"
   8 #include "missing_network.h"
   9 #include "netlink-util.h"
  10 #include "networkd-address.h"
  11 #include "networkd-manager.h"
  12 #include "parse-util.h"
  13 #include "set.h"
  14 #include "socket-util.h"
  15 #include "string-util.h"
  16 #include "strv.h"
  17 #include "utf8.h"
  18 #include "util.h"
  19
  20 #define ADDRESSES_PER_LINK_MAX 2048U
  21 #define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
  22
  23 int address_new(Address **ret) {
  24         _cleanup_(address_freep) Address *address = NULL;
  25
  26         address = new(Address, 1);
  27         if (!address)
  28                 return -ENOMEM;
  29
  30         *address = (Address) {
  31                 .family = AF_UNSPEC,
  32                 .scope = RT_SCOPE_UNIVERSE,
  33                 .cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME,
  34                 .cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME,
  35         };
  36
  37         *ret = TAKE_PTR(address);
  38
  39         return 0;
  40 }
  41
  42 int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) {
  43         _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
  44         _cleanup_(address_freep) Address *address = NULL;
  45         int r;
  46
  47         assert(network);
  48         assert(ret);
  49         assert(!!filename == (section_line > 0));
  50
  51         if (filename) {
  52                 r = network_config_section_new(filename, section_line, &n);
  53                 if (r < 0)
  54                         return r;
  55
  56                 address = hashmap_get(network->addresses_by_section, n);
  57                 if (address) {
  58                         *ret = TAKE_PTR(address);
  59
  60                         return 0;
  61                 }
  62         }
  63
  64         if (network->n_static_addresses >= STATIC_ADDRESSES_PER_NETWORK_MAX)
  65                 return -E2BIG;
  66
  67         r = address_new(&address);
  68         if (r < 0)
  69                 return r;
  70
  71         address->network = network;
  72         LIST_APPEND(addresses, network->static_addresses, address);
  73         network->n_static_addresses++;
  74
  75         if (filename) {
  76                 address->section = TAKE_PTR(n);
  77
  78                 r = hashmap_ensure_allocated(&network->addresses_by_section, &network_config_hash_ops);
  79                 if (r < 0)
  80                         return r;
  81
  82                 r = hashmap_put(network->addresses_by_section, address->section, address);
  83                 if (r < 0)
  84                         return r;
  85         }
  86
  87         *ret = TAKE_PTR(address);
  88
  89         return 0;
  90 }
  91
  92 void address_free(Address *address) {
  93         if (!address)
  94                 return;
  95
  96         if (address->network) {
  97                 LIST_REMOVE(addresses, address->network->static_addresses, address);
  98                 assert(address->network->n_static_addresses > 0);
  99                 address->network->n_static_addresses--;
 100
 101                 if (address->section)
 102                         hashmap_remove(address->network->addresses_by_section, address->section);
 103         }
 104
 105         if (address->link) {
 106                 set_remove(address->link->addresses, address);
 107                 set_remove(address->link->addresses_foreign, address);
 108
 109                 if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
 110                         memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
 111         }
 112
 113         network_config_section_free(address->section);
 114         free(address->label);
 115         free(address);
 116 }
 117
 118 static void address_hash_func(const Address *a, struct siphash *state) {
 119         assert(a);
 120
 121         siphash24_compress(&a->family, sizeof(a->family), state);
 122
 123         switch (a->family) {
 124         case AF_INET:
 125                 siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state);
 126
 127                 /* peer prefix */
 128                 if (a->prefixlen != 0) {
 129                         uint32_t prefix;
 130
 131                         if (a->in_addr_peer.in.s_addr != 0)
 132                                 prefix = be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen);
 133                         else
 134                                 prefix = be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
 135
 136                         siphash24_compress(&prefix, sizeof(prefix), state);
 137                 }
 138
 139                 _fallthrough_;
 140         case AF_INET6:
 141                 /* local address */
 142                 siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state);
 143
 144                 break;
 145         default:
 146                 /* treat any other address family as AF_UNSPEC */
 147                 break;
 148         }
 149 }
 150
 151 static int address_compare_func(const Address *a1, const Address *a2) {
 152         int r;
 153
 154         r = CMP(a1->family, a2->family);
 155         if (r != 0)
 156                 return r;
 157
 158         switch (a1->family) {
 159         /* use the same notion of equality as the kernel does */
 160         case AF_INET:
 161                 r = CMP(a1->prefixlen, a2->prefixlen);
 162                 if (r != 0)
 163                         return r;
 164
 165                 /* compare the peer prefixes */
 166                 if (a1->prefixlen != 0) {
 167                         /* make sure we don't try to shift by 32.
 168                          * See ISO/IEC 9899:TC3 § 6.5.7.3. */
 169                         uint32_t b1, b2;
 170
 171                         if (a1->in_addr_peer.in.s_addr != 0)
 172                                 b1 = be32toh(a1->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
 173                         else
 174                                 b1 = be32toh(a1->in_addr.in.s_addr) >> (32 - a1->prefixlen);
 175
 176                         if (a2->in_addr_peer.in.s_addr != 0)
 177                                 b2 = be32toh(a2->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
 178                         else
 179                                 b2 = be32toh(a2->in_addr.in.s_addr) >> (32 - a1->prefixlen);
 180
 181                         r = CMP(b1, b2);
 182                         if (r != 0)
 183                                 return r;
 184                 }
 185
 186                 _fallthrough_;
 187         case AF_INET6:
 188                 return memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family));
 189         default:
 190                 /* treat any other address family as AF_UNSPEC */
 191                 return 0;
 192         }
 193 }
 194
 195 DEFINE_PRIVATE_HASH_OPS(address_hash_ops, Address, address_hash_func, address_compare_func);
 196
 197 bool address_equal(Address *a1, Address *a2) {
 198         if (a1 == a2)
 199                 return true;
 200
 201         if (!a1 || !a2)
 202                 return false;
 203
 204         return address_compare_func(a1, a2) == 0;
 205 }
 206
 207 static int address_establish(Address *address, Link *link) {
 208         bool masq;
 209         int r;
 210
 211         assert(address);
 212         assert(link);
 213
 214         masq = link->network &&
 215                link->network->ip_masquerade &&
 216                address->family == AF_INET &&
 217                address->scope < RT_SCOPE_LINK;
 218
 219         /* Add firewall entry if this is requested */
 220         if (address->ip_masquerade_done != masq) {
 221                 union in_addr_union masked = address->in_addr;
 222                 in_addr_mask(address->family, &masked, address->prefixlen);
 223
 224                 r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
 225                 if (r < 0)
 226                         log_link_warning_errno(link, r, "Could not enable IP masquerading: %m");
 227
 228                 address->ip_masquerade_done = masq;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int address_add_internal(Link *link, Set **addresses,
 235                                 int family,
 236                                 const union in_addr_union *in_addr,
 237                                 unsigned char prefixlen,
 238                                 Address **ret) {
 239         _cleanup_(address_freep) Address *address = NULL;
 240         int r;
 241
 242         assert(link);
 243         assert(addresses);
 244         assert(in_addr);
 245
 246         r = address_new(&address);
 247         if (r < 0)
 248                 return r;
 249
 250         address->family = family;
 251         address->in_addr = *in_addr;
 252         address->prefixlen = prefixlen;
 253         /* Consider address tentative until we get the real flags from the kernel */
 254         address->flags = IFA_F_TENTATIVE;
 255
 256         r = set_ensure_allocated(addresses, &address_hash_ops);
 257         if (r < 0)
 258                 return r;
 259
 260         r = set_put(*addresses, address);
 261         if (r < 0)
 262                 return r;
 263
 264         address->link = link;
 265
 266         if (ret)
 267                 *ret = address;
 268
 269         address = NULL;
 270
 271         return 0;
 272 }
 273
 274 int address_add_foreign(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
 275         return address_add_internal(link, &link->addresses_foreign, family, in_addr, prefixlen, ret);
 276 }
 277
 278 int address_add(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
 279         Address *address;
 280         int r;
 281
 282         r = address_get(link, family, in_addr, prefixlen, &address);
 283         if (r == -ENOENT) {
 284                 /* Address does not exist, create a new one */
 285                 r = address_add_internal(link, &link->addresses, family, in_addr, prefixlen, &address);
 286                 if (r < 0)
 287                         return r;
 288         } else if (r == 0) {
 289                 /* Take over a foreign address */
 290                 r = set_ensure_allocated(&link->addresses, &address_hash_ops);
 291                 if (r < 0)
 292                         return r;
 293
 294                 r = set_put(link->addresses, address);
 295                 if (r < 0)
 296                         return r;
 297
 298                 set_remove(link->addresses_foreign, address);
 299         } else if (r == 1) {
 300                 /* Already exists, do nothing */
 301                 ;
 302         } else
 303                 return r;
 304
 305         if (ret)
 306                 *ret = address;
 307
 308         return 0;
 309 }
 310
 311 static int address_release(Address *address) {
 312         int r;
 313
 314         assert(address);
 315         assert(address->link);
 316
 317         /* Remove masquerading firewall entry if it was added */
 318         if (address->ip_masquerade_done) {
 319                 union in_addr_union masked = address->in_addr;
 320                 in_addr_mask(address->family, &masked, address->prefixlen);
 321
 322                 r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
 323                 if (r < 0)
 324                         log_link_warning_errno(address->link, r, "Failed to disable IP masquerading: %m");
 325
 326                 address->ip_masquerade_done = false;
 327         }
 328
 329         return 0;
 330 }
 331
 332 int address_update(
 333                 Address *address,
 334                 unsigned char flags,
 335                 unsigned char scope,
 336                 const struct ifa_cacheinfo *cinfo) {
 337
 338         bool ready;
 339         int r;
 340
 341         assert(address);
 342         assert(cinfo);
 343         assert_return(address->link, 1);
 344
 345         if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 346                 return 1;
 347
 348         ready = address_is_ready(address);
 349
 350         address->flags = flags;
 351         address->scope = scope;
 352         address->cinfo = *cinfo;
 353
 354         link_update_operstate(address->link);
 355         link_check_ready(address->link);
 356
 357         if (!ready &&
 358             address_is_ready(address) &&
 359             address->family == AF_INET6 &&
 360             in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 &&
 361             in_addr_is_null(AF_INET6, (const union in_addr_union*) &address->link->ipv6ll_address) > 0) {
 362
 363                 r = link_ipv6ll_gained(address->link, &address->in_addr.in6);
 364                 if (r < 0)
 365                         return r;
 366         }
 367
 368         return 0;
 369 }
 370
 371 int address_drop(Address *address) {
 372         Link *link;
 373         bool ready;
 374
 375         assert(address);
 376
 377         ready = address_is_ready(address);
 378         link = address->link;
 379
 380         address_release(address);
 381         address_free(address);
 382
 383         link_update_operstate(link);
 384
 385         if (link && !ready)
 386                 link_check_ready(link);
 387
 388         return 0;
 389 }
 390
 391 int address_get(Link *link,
 392                 int family,
 393                 const union in_addr_union *in_addr,
 394                 unsigned char prefixlen,
 395                 Address **ret) {
 396
 397         Address address, *existing;
 398
 399         assert(link);
 400         assert(in_addr);
 401
 402         address = (Address) {
 403                 .family = family,
 404                 .in_addr = *in_addr,
 405                 .prefixlen = prefixlen,
 406         };
 407
 408         existing = set_get(link->addresses, &address);
 409         if (existing) {
 410                 if (ret)
 411                         *ret = existing;
 412                 return 1;
 413         }
 414
 415         existing = set_get(link->addresses_foreign, &address);
 416         if (existing) {
 417                 if (ret)
 418                         *ret = existing;
 419                 return 0;
 420         }
 421
 422         return -ENOENT;
 423 }
 424
 425 static int address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
 426         int r;
 427
 428         assert(m);
 429         assert(link);
 430         assert(link->ifname);
 431
 432         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 433                 return 1;
 434
 435         r = sd_netlink_message_get_errno(m);
 436         if (r < 0 && r != -EADDRNOTAVAIL)
 437                 log_link_warning_errno(link, r, "Could not drop address: %m");
 438
 439         return 1;
 440 }
 441
 442 int address_remove(
 443                 Address *address,
 444                 Link *link,
 445                 link_netlink_message_handler_t callback) {
 446
 447         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 448         _cleanup_free_ char *b = NULL;
 449         int r;
 450
 451         assert(address);
 452         assert(IN_SET(address->family, AF_INET, AF_INET6));
 453         assert(link);
 454         assert(link->ifindex > 0);
 455         assert(link->manager);
 456         assert(link->manager->rtnl);
 457
 458         if (DEBUG_LOGGING) {
 459                 if (in_addr_to_string(address->family, &address->in_addr, &b) >= 0)
 460                         log_link_debug(link, "Removing address %s", b);
 461         }
 462
 463         r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
 464                                      link->ifindex, address->family);
 465         if (r < 0)
 466                 return log_error_errno(r, "Could not allocate RTM_DELADDR message: %m");
 467
 468         r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
 469         if (r < 0)
 470                 return log_error_errno(r, "Could not set prefixlen: %m");
 471
 472         if (address->family == AF_INET)
 473                 r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
 474         else if (address->family == AF_INET6)
 475                 r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
 476         if (r < 0)
 477                 return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
 478
 479         r = netlink_call_async(link->manager->rtnl, NULL, req,
 480                                callback ?: address_remove_handler,
 481                                link_netlink_destroy_callback, link);
 482         if (r < 0)
 483                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 484
 485         link_ref(link);
 486
 487         return 0;
 488 }
 489
 490 static int address_acquire(Link *link, Address *original, Address **ret) {
 491         union in_addr_union in_addr = {};
 492         struct in_addr broadcast = {};
 493         _cleanup_(address_freep) Address *na = NULL;
 494         int r;
 495
 496         assert(link);
 497         assert(original);
 498         assert(ret);
 499
 500         /* Something useful was configured? just use it */
 501         if (in_addr_is_null(original->family, &original->in_addr) <= 0)
 502                 return 0;
 503
 504         /* The address is configured to be 0.0.0.0 or [::] by the user?
 505          * Then let's acquire something more useful from the pool. */
 506         r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr);
 507         if (r < 0)
 508                 return log_link_error_errno(link, r, "Failed to acquire address from pool: %m");
 509         if (r == 0) {
 510                 log_link_error(link, "Couldn't find free address for interface, all taken.");
 511                 return -EBUSY;
 512         }
 513
 514         if (original->family == AF_INET) {
 515                 /* Pick first address in range for ourselves ... */
 516                 in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
 517
 518                 /* .. and use last as broadcast address */
 519                 if (original->prefixlen > 30)
 520                         broadcast.s_addr = 0;
 521                 else
 522                         broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen);
 523         } else if (original->family == AF_INET6)
 524                 in_addr.in6.s6_addr[15] |= 1;
 525
 526         r = address_new(&na);
 527         if (r < 0)
 528                 return r;
 529
 530         na->family = original->family;
 531         na->prefixlen = original->prefixlen;
 532         na->scope = original->scope;
 533         na->cinfo = original->cinfo;
 534
 535         if (original->label) {
 536                 na->label = strdup(original->label);
 537                 if (!na->label)
 538                         return -ENOMEM;
 539         }
 540
 541         na->broadcast = broadcast;
 542         na->in_addr = in_addr;
 543
 544         LIST_PREPEND(addresses, link->pool_addresses, na);
 545
 546         *ret = TAKE_PTR(na);
 547
 548         return 0;
 549 }
 550
 551 int address_configure(
 552                 Address *address,
 553                 Link *link,
 554                 link_netlink_message_handler_t callback,
 555                 bool update) {
 556
 557         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 558         int r;
 559
 560         assert(address);
 561         assert(IN_SET(address->family, AF_INET, AF_INET6));
 562         assert(link);
 563         assert(link->ifindex > 0);
 564         assert(link->manager);
 565         assert(link->manager->rtnl);
 566         assert(callback);
 567
 568         /* If this is a new address, then refuse adding more than the limit */
 569         if (address_get(link, address->family, &address->in_addr, address->prefixlen, NULL) <= 0 &&
 570             set_size(link->addresses) >= ADDRESSES_PER_LINK_MAX)
 571                 return -E2BIG;
 572
 573         r = address_acquire(link, address, &address);
 574         if (r < 0)
 575                 return r;
 576
 577         if (update)
 578                 r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req,
 579                                                     link->ifindex, address->family);
 580         else
 581                 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
 582                                              link->ifindex, address->family);
 583         if (r < 0)
 584                 return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
 585
 586         r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
 587         if (r < 0)
 588                 return log_error_errno(r, "Could not set prefixlen: %m");
 589
 590         address->flags |= IFA_F_PERMANENT;
 591
 592         if (address->home_address)
 593                 address->flags |= IFA_F_HOMEADDRESS;
 594
 595         if (address->duplicate_address_detection)
 596                 address->flags |= IFA_F_NODAD;
 597
 598         if (address->manage_temporary_address)
 599                 address->flags |= IFA_F_MANAGETEMPADDR;
 600
 601         if (address->prefix_route)
 602                 address->flags |= IFA_F_NOPREFIXROUTE;
 603
 604         if (address->autojoin)
 605                 address->flags |= IFA_F_MCAUTOJOIN;
 606
 607         r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff));
 608         if (r < 0)
 609                 return log_error_errno(r, "Could not set flags: %m");
 610
 611         if (address->flags & ~0xff) {
 612                 r = sd_netlink_message_append_u32(req, IFA_FLAGS, address->flags);
 613                 if (r < 0)
 614                         return log_error_errno(r, "Could not set extended flags: %m");
 615         }
 616
 617         r = sd_rtnl_message_addr_set_scope(req, address->scope);
 618         if (r < 0)
 619                 return log_error_errno(r, "Could not set scope: %m");
 620
 621         if (address->family == AF_INET)
 622                 r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
 623         else if (address->family == AF_INET6)
 624                 r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
 625         if (r < 0)
 626                 return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
 627
 628         if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
 629                 if (address->family == AF_INET)
 630                         r = sd_netlink_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
 631                 else if (address->family == AF_INET6)
 632                         r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);
 633                 if (r < 0)
 634                         return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
 635         } else if (address->family == AF_INET && address->prefixlen <= 30) {
 636                 r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
 637                 if (r < 0)
 638                         return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m");
 639         }
 640
 641         if (address->label) {
 642                 r = sd_netlink_message_append_string(req, IFA_LABEL, address->label);
 643                 if (r < 0)
 644                         return log_error_errno(r, "Could not append IFA_LABEL attribute: %m");
 645         }
 646
 647         r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO, &address->cinfo);
 648         if (r < 0)
 649                 return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m");
 650
 651         r = address_establish(address, link);
 652         if (r < 0)
 653                 return r;
 654
 655         r = netlink_call_async(link->manager->rtnl, NULL, req, callback, link_netlink_destroy_callback, link);
 656         if (r < 0) {
 657                 address_release(address);
 658                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 659         }
 660
 661         link_ref(link);
 662
 663         if (address->family == AF_INET6 && !in_addr_is_null(address->family, &address->in_addr_peer))
 664                 r = address_add(link, address->family, &address->in_addr_peer, address->prefixlen, NULL);
 665         else
 666                 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
 667         if (r < 0) {
 668                 address_release(address);
 669                 return log_error_errno(r, "Could not add address: %m");
 670         }
 671
 672         return 0;
 673 }
 674
 675 int config_parse_broadcast(
 676                 const char *unit,
 677                 const char *filename,
 678                 unsigned line,
 679                 const char *section,
 680                 unsigned section_line,
 681                 const char *lvalue,
 682                 int ltype,
 683                 const char *rvalue,
 684                 void *data,
 685                 void *userdata) {
 686
 687         Network *network = userdata;
 688         _cleanup_(address_freep) Address *n = NULL;
 689         int r;
 690
 691         assert(filename);
 692         assert(section);
 693         assert(lvalue);
 694         assert(rvalue);
 695         assert(data);
 696
 697         r = address_new_static(network, filename, section_line, &n);
 698         if (r < 0)
 699                 return r;
 700
 701         if (n->family == AF_INET6) {
 702                 log_syntax(unit, LOG_ERR, filename, line, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
 703                 return 0;
 704         }
 705
 706         r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
 707         if (r < 0) {
 708                 log_syntax(unit, LOG_ERR, filename, line, r, "Broadcast is invalid, ignoring assignment: %s", rvalue);
 709                 return 0;
 710         }
 711
 712         n->family = AF_INET;
 713         n = NULL;
 714
 715         return 0;
 716 }
 717
 718 int config_parse_address(const char *unit,
 719                 const char *filename,
 720                 unsigned line,
 721                 const char *section,
 722                 unsigned section_line,
 723                 const char *lvalue,
 724                 int ltype,
 725                 const char *rvalue,
 726                 void *data,
 727                 void *userdata) {
 728
 729         Network *network = userdata;
 730         _cleanup_(address_freep) Address *n = NULL;
 731         union in_addr_union buffer;
 732         unsigned char prefixlen;
 733         int r, f;
 734
 735         assert(filename);
 736         assert(section);
 737         assert(lvalue);
 738         assert(rvalue);
 739         assert(data);
 740
 741         if (streq(section, "Network")) {
 742                 /* we are not in an Address section, so treat
 743                  * this as the special '0' section */
 744                 r = address_new_static(network, NULL, 0, &n);
 745         } else
 746                 r = address_new_static(network, filename, section_line, &n);
 747
 748         if (r < 0)
 749                 return r;
 750
 751         /* Address=address/prefixlen */
 752         r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_REFUSE, &f, &buffer, &prefixlen);
 753         if (r == -ENOANO) {
 754                 log_syntax(unit, LOG_ERR, filename, line, r,
 755                            "An address '%s' is specified without prefix length. "
 756                            "The behavior of parsing addresses without prefix length will be changed in the future release. "
 757                            "Please specify prefix length explicitly.", rvalue);
 758
 759                 r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_LEGACY, &f, &buffer, &prefixlen);
 760         }
 761         if (r < 0) {
 762                 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid address '%s', ignoring assignment: %m", rvalue);
 763                 return 0;
 764         }
 765
 766         if (n->family != AF_UNSPEC && f != n->family) {
 767                 log_syntax(unit, LOG_ERR, filename, line, 0, "Address is incompatible, ignoring assignment: %s", rvalue);
 768                 return 0;
 769         }
 770
 771         n->family = f;
 772         n->prefixlen = prefixlen;
 773
 774         if (streq(lvalue, "Address"))
 775                 n->in_addr = buffer;
 776         else
 777                 n->in_addr_peer = buffer;
 778
 779         if (n->family == AF_INET && n->broadcast.s_addr == 0)
 780                 n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
 781
 782         n = NULL;
 783
 784         return 0;
 785 }
 786
 787 int config_parse_label(
 788                 const char *unit,
 789                 const char *filename,
 790                 unsigned line,
 791                 const char *section,
 792                 unsigned section_line,
 793                 const char *lvalue,
 794                 int ltype,
 795                 const char *rvalue,
 796                 void *data,
 797                 void *userdata) {
 798
 799         _cleanup_(address_freep) Address *n = NULL;
 800         Network *network = userdata;
 801         int r;
 802
 803         assert(filename);
 804         assert(section);
 805         assert(lvalue);
 806         assert(rvalue);
 807         assert(data);
 808
 809         r = address_new_static(network, filename, section_line, &n);
 810         if (r < 0)
 811                 return r;
 812
 813         if (!address_label_valid(rvalue)) {
 814                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface label is too long or invalid, ignoring assignment: %s", rvalue);
 815                 return 0;
 816         }
 817
 818         r = free_and_strdup(&n->label, rvalue);
 819         if (r < 0)
 820                 return log_oom();
 821
 822         n = NULL;
 823
 824         return 0;
 825 }
 826
 827 int config_parse_lifetime(const char *unit,
 828                           const char *filename,
 829                           unsigned line,
 830                           const char *section,
 831                           unsigned section_line,
 832                           const char *lvalue,
 833                           int ltype,
 834                           const char *rvalue,
 835                           void *data,
 836                           void *userdata) {
 837         Network *network = userdata;
 838         _cleanup_(address_freep) Address *n = NULL;
 839         unsigned k;
 840         int r;
 841
 842         assert(filename);
 843         assert(section);
 844         assert(lvalue);
 845         assert(rvalue);
 846         assert(data);
 847
 848         r = address_new_static(network, filename, section_line, &n);
 849         if (r < 0)
 850                 return r;
 851
 852         if (STR_IN_SET(rvalue, "forever", "infinity")) {
 853                 n->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
 854                 n = NULL;
 855
 856                 return 0;
 857         }
 858
 859         r = safe_atou(rvalue, &k);
 860         if (r < 0) {
 861                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PreferredLifetime, ignoring: %s", rvalue);
 862                 return 0;
 863         }
 864
 865         if (k != 0)
 866                 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid PreferredLifetime value, ignoring: %d", k);
 867         else {
 868                 n->cinfo.ifa_prefered = k;
 869                 n = NULL;
 870         }
 871
 872         return 0;
 873 }
 874
 875 int config_parse_address_flags(const char *unit,
 876                                const char *filename,
 877                                unsigned line,
 878                                const char *section,
 879                                unsigned section_line,
 880                                const char *lvalue,
 881                                int ltype,
 882                                const char *rvalue,
 883                                void *data,
 884                                void *userdata) {
 885         Network *network = userdata;
 886         _cleanup_(address_freep) Address *n = NULL;
 887         int r;
 888
 889         assert(filename);
 890         assert(section);
 891         assert(lvalue);
 892         assert(rvalue);
 893         assert(data);
 894
 895         r = address_new_static(network, filename, section_line, &n);
 896         if (r < 0)
 897                 return r;
 898
 899         r = parse_boolean(rvalue);
 900         if (r < 0) {
 901                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
 902                 return 0;
 903         }
 904
 905         if (streq(lvalue, "HomeAddress"))
 906                 n->home_address = r;
 907         else if (streq(lvalue, "DuplicateAddressDetection"))
 908                 n->duplicate_address_detection = r;
 909         else if (streq(lvalue, "ManageTemporaryAddress"))
 910                 n->manage_temporary_address = r;
 911         else if (streq(lvalue, "PrefixRoute"))
 912                 n->prefix_route = r;
 913         else if (streq(lvalue, "AutoJoin"))
 914                 n->autojoin = r;
 915
 916         return 0;
 917 }
 918
 919 int config_parse_address_scope(const char *unit,
 920                                const char *filename,
 921                                unsigned line,
 922                                const char *section,
 923                                unsigned section_line,
 924                                const char *lvalue,
 925                                int ltype,
 926                                const char *rvalue,
 927                                void *data,
 928                                void *userdata) {
 929         Network *network = userdata;
 930         _cleanup_(address_freep) Address *n = NULL;
 931         int r;
 932
 933         assert(filename);
 934         assert(section);
 935         assert(lvalue);
 936         assert(rvalue);
 937         assert(data);
 938
 939         r = address_new_static(network, filename, section_line, &n);
 940         if (r < 0)
 941                 return r;
 942
 943         if (streq(rvalue, "host"))
 944                 n->scope = RT_SCOPE_HOST;
 945         else if (streq(rvalue, "link"))
 946                 n->scope = RT_SCOPE_LINK;
 947         else if (streq(rvalue, "global"))
 948                 n->scope = RT_SCOPE_UNIVERSE;
 949         else {
 950                 r = safe_atou8(rvalue , &n->scope);
 951                 if (r < 0) {
 952                         log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse address scope \"%s\", ignoring assignment: %m", rvalue);
 953                         return 0;
 954                 }
 955         }
 956
 957         n = NULL;
 958
 959         return 0;
 960 }
 961
 962 bool address_is_ready(const Address *a) {
 963         assert(a);
 964
 965         if (a->family == AF_INET6)
 966                 return !(a->flags & IFA_F_TENTATIVE);
 967         else
 968                 return !(a->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED));
 969 }