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
 355         if (!ready && address_is_ready(address)) {
 356                 link_check_ready(address->link);
 357
 358                 if (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
 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 {
 636                 if (address->family == AF_INET) {
 637                         if (address->prefixlen <= 30) {
 638                                 r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
 639                                 if (r < 0)
 640                                         return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m");
 641                         }
 642                 }
 643         }
 644
 645         if (address->label) {
 646                 r = sd_netlink_message_append_string(req, IFA_LABEL, address->label);
 647                 if (r < 0)
 648                         return log_error_errno(r, "Could not append IFA_LABEL attribute: %m");
 649         }
 650
 651         r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO,
 652                                               &address->cinfo);
 653         if (r < 0)
 654                 return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m");
 655
 656         r = address_establish(address, link);
 657         if (r < 0)
 658                 return r;
 659
 660         r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
 661                                link_netlink_destroy_callback, link);
 662         if (r < 0) {
 663                 address_release(address);
 664                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 665         }
 666
 667         link_ref(link);
 668
 669         r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
 670         if (r < 0) {
 671                 address_release(address);
 672                 return log_error_errno(r, "Could not add address: %m");
 673         }
 674
 675         return 0;
 676 }
 677
 678 int config_parse_broadcast(
 679                 const char *unit,
 680                 const char *filename,
 681                 unsigned line,
 682                 const char *section,
 683                 unsigned section_line,
 684                 const char *lvalue,
 685                 int ltype,
 686                 const char *rvalue,
 687                 void *data,
 688                 void *userdata) {
 689
 690         Network *network = userdata;
 691         _cleanup_(address_freep) Address *n = NULL;
 692         int r;
 693
 694         assert(filename);
 695         assert(section);
 696         assert(lvalue);
 697         assert(rvalue);
 698         assert(data);
 699
 700         r = address_new_static(network, filename, section_line, &n);
 701         if (r < 0)
 702                 return r;
 703
 704         if (n->family == AF_INET6) {
 705                 log_syntax(unit, LOG_ERR, filename, line, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
 706                 return 0;
 707         }
 708
 709         r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
 710         if (r < 0) {
 711                 log_syntax(unit, LOG_ERR, filename, line, r, "Broadcast is invalid, ignoring assignment: %s", rvalue);
 712                 return 0;
 713         }
 714
 715         n->family = AF_INET;
 716         n = NULL;
 717
 718         return 0;
 719 }
 720
 721 int config_parse_address(const char *unit,
 722                 const char *filename,
 723                 unsigned line,
 724                 const char *section,
 725                 unsigned section_line,
 726                 const char *lvalue,
 727                 int ltype,
 728                 const char *rvalue,
 729                 void *data,
 730                 void *userdata) {
 731
 732         Network *network = userdata;
 733         _cleanup_(address_freep) Address *n = NULL;
 734         union in_addr_union buffer;
 735         unsigned char prefixlen;
 736         int r, f;
 737
 738         assert(filename);
 739         assert(section);
 740         assert(lvalue);
 741         assert(rvalue);
 742         assert(data);
 743
 744         if (streq(section, "Network")) {
 745                 /* we are not in an Address section, so treat
 746                  * this as the special '0' section */
 747                 r = address_new_static(network, NULL, 0, &n);
 748         } else
 749                 r = address_new_static(network, filename, section_line, &n);
 750
 751         if (r < 0)
 752                 return r;
 753
 754         /* Address=address/prefixlen */
 755         r = in_addr_default_prefix_from_string_auto(rvalue, &f, &buffer, &prefixlen);
 756         if (r < 0) {
 757                 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid address '%s', ignoring assignment: %m", rvalue);
 758                 return 0;
 759         }
 760
 761         if (n->family != AF_UNSPEC && f != n->family) {
 762                 log_syntax(unit, LOG_ERR, filename, line, 0, "Address is incompatible, ignoring assignment: %s", rvalue);
 763                 return 0;
 764         }
 765
 766         n->family = f;
 767         n->prefixlen = prefixlen;
 768
 769         if (streq(lvalue, "Address"))
 770                 n->in_addr = buffer;
 771         else
 772                 n->in_addr_peer = buffer;
 773
 774         if (n->family == AF_INET && n->broadcast.s_addr == 0)
 775                 n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
 776
 777         n = NULL;
 778
 779         return 0;
 780 }
 781
 782 int config_parse_label(
 783                 const char *unit,
 784                 const char *filename,
 785                 unsigned line,
 786                 const char *section,
 787                 unsigned section_line,
 788                 const char *lvalue,
 789                 int ltype,
 790                 const char *rvalue,
 791                 void *data,
 792                 void *userdata) {
 793
 794         _cleanup_(address_freep) Address *n = NULL;
 795         Network *network = userdata;
 796         int r;
 797
 798         assert(filename);
 799         assert(section);
 800         assert(lvalue);
 801         assert(rvalue);
 802         assert(data);
 803
 804         r = address_new_static(network, filename, section_line, &n);
 805         if (r < 0)
 806                 return r;
 807
 808         if (!address_label_valid(rvalue)) {
 809                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface label is too long or invalid, ignoring assignment: %s", rvalue);
 810                 return 0;
 811         }
 812
 813         r = free_and_strdup(&n->label, rvalue);
 814         if (r < 0)
 815                 return log_oom();
 816
 817         n = NULL;
 818
 819         return 0;
 820 }
 821
 822 int config_parse_lifetime(const char *unit,
 823                           const char *filename,
 824                           unsigned line,
 825                           const char *section,
 826                           unsigned section_line,
 827                           const char *lvalue,
 828                           int ltype,
 829                           const char *rvalue,
 830                           void *data,
 831                           void *userdata) {
 832         Network *network = userdata;
 833         _cleanup_(address_freep) Address *n = NULL;
 834         unsigned k;
 835         int r;
 836
 837         assert(filename);
 838         assert(section);
 839         assert(lvalue);
 840         assert(rvalue);
 841         assert(data);
 842
 843         r = address_new_static(network, filename, section_line, &n);
 844         if (r < 0)
 845                 return r;
 846
 847         if (STR_IN_SET(rvalue, "forever", "infinity")) {
 848                 n->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
 849                 n = NULL;
 850
 851                 return 0;
 852         }
 853
 854         r = safe_atou(rvalue, &k);
 855         if (r < 0) {
 856                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PreferredLifetime, ignoring: %s", rvalue);
 857                 return 0;
 858         }
 859
 860         if (k != 0)
 861                 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid PreferredLifetime value, ignoring: %d", k);
 862         else {
 863                 n->cinfo.ifa_prefered = k;
 864                 n = NULL;
 865         }
 866
 867         return 0;
 868 }
 869
 870 int config_parse_address_flags(const char *unit,
 871                                const char *filename,
 872                                unsigned line,
 873                                const char *section,
 874                                unsigned section_line,
 875                                const char *lvalue,
 876                                int ltype,
 877                                const char *rvalue,
 878                                void *data,
 879                                void *userdata) {
 880         Network *network = userdata;
 881         _cleanup_(address_freep) Address *n = NULL;
 882         int r;
 883
 884         assert(filename);
 885         assert(section);
 886         assert(lvalue);
 887         assert(rvalue);
 888         assert(data);
 889
 890         r = address_new_static(network, filename, section_line, &n);
 891         if (r < 0)
 892                 return r;
 893
 894         r = parse_boolean(rvalue);
 895         if (r < 0) {
 896                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
 897                 return 0;
 898         }
 899
 900         if (streq(lvalue, "HomeAddress"))
 901                 n->home_address = r;
 902         else if (streq(lvalue, "DuplicateAddressDetection"))
 903                 n->duplicate_address_detection = r;
 904         else if (streq(lvalue, "ManageTemporaryAddress"))
 905                 n->manage_temporary_address = r;
 906         else if (streq(lvalue, "PrefixRoute"))
 907                 n->prefix_route = r;
 908         else if (streq(lvalue, "AutoJoin"))
 909                 n->autojoin = r;
 910
 911         return 0;
 912 }
 913
 914 int config_parse_address_scope(const char *unit,
 915                                const char *filename,
 916                                unsigned line,
 917                                const char *section,
 918                                unsigned section_line,
 919                                const char *lvalue,
 920                                int ltype,
 921                                const char *rvalue,
 922                                void *data,
 923                                void *userdata) {
 924         Network *network = userdata;
 925         _cleanup_(address_freep) Address *n = NULL;
 926         int r;
 927
 928         assert(filename);
 929         assert(section);
 930         assert(lvalue);
 931         assert(rvalue);
 932         assert(data);
 933
 934         r = address_new_static(network, filename, section_line, &n);
 935         if (r < 0)
 936                 return r;
 937
 938         if (streq(rvalue, "host"))
 939                 n->scope = RT_SCOPE_HOST;
 940         else if (streq(rvalue, "link"))
 941                 n->scope = RT_SCOPE_LINK;
 942         else if (streq(rvalue, "global"))
 943                 n->scope = RT_SCOPE_UNIVERSE;
 944         else {
 945                 r = safe_atou8(rvalue , &n->scope);
 946                 if (r < 0) {
 947                         log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse address scope \"%s\", ignoring assignment: %m", rvalue);
 948                         return 0;
 949                 }
 950         }
 951
 952         n = NULL;
 953
 954         return 0;
 955 }
 956
 957 bool address_is_ready(const Address *a) {
 958         assert(a);
 959
 960         if (a->family == AF_INET6)
 961                 return !(a->flags & IFA_F_TENTATIVE);
 962         else
 963                 return !(a->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED));
 964 }