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