src/libsystemd-network/sd-dhcp-lease.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 /***
   3   Copyright © 2013 Intel Corporation. All rights reserved.
   4 ***/
   5
   6 #include <arpa/inet.h>
   7 #include <errno.h>
   8 #include <stdlib.h>
   9 #include <sys/stat.h>
  10 #include <sys/types.h>
  11 #include <unistd.h>
  12
  13 #include "sd-dhcp-lease.h"
  14
  15 #include "alloc-util.h"
  16 #include "dhcp-lease-internal.h"
  17 #include "dhcp-protocol.h"
  18 #include "dns-domain.h"
  19 #include "env-file.h"
  20 #include "fd-util.h"
  21 #include "fileio.h"
  22 #include "fs-util.h"
  23 #include "hexdecoct.h"
  24 #include "hostname-util.h"
  25 #include "in-addr-util.h"
  26 #include "network-internal.h"
  27 #include "parse-util.h"
  28 #include "stdio-util.h"
  29 #include "string-util.h"
  30 #include "strv.h"
  31 #include "tmpfile-util.h"
  32 #include "unaligned.h"
  33
  34 int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
  35         assert_return(lease, -EINVAL);
  36         assert_return(addr, -EINVAL);
  37
  38         if (lease->address == 0)
  39                 return -ENODATA;
  40
  41         addr->s_addr = lease->address;
  42         return 0;
  43 }
  44
  45 int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr) {
  46         assert_return(lease, -EINVAL);
  47         assert_return(addr, -EINVAL);
  48
  49         if (!lease->have_broadcast)
  50                 return -ENODATA;
  51
  52         addr->s_addr = lease->broadcast;
  53         return 0;
  54 }
  55
  56 int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) {
  57         assert_return(lease, -EINVAL);
  58         assert_return(lifetime, -EINVAL);
  59
  60         if (lease->lifetime <= 0)
  61                 return -ENODATA;
  62
  63         *lifetime = lease->lifetime;
  64         return 0;
  65 }
  66
  67 int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1) {
  68         assert_return(lease, -EINVAL);
  69         assert_return(t1, -EINVAL);
  70
  71         if (lease->t1 <= 0)
  72                 return -ENODATA;
  73
  74         *t1 = lease->t1;
  75         return 0;
  76 }
  77
  78 int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2) {
  79         assert_return(lease, -EINVAL);
  80         assert_return(t2, -EINVAL);
  81
  82         if (lease->t2 <= 0)
  83                 return -ENODATA;
  84
  85         *t2 = lease->t2;
  86         return 0;
  87 }
  88
  89 int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu) {
  90         assert_return(lease, -EINVAL);
  91         assert_return(mtu, -EINVAL);
  92
  93         if (lease->mtu <= 0)
  94                 return -ENODATA;
  95
  96         *mtu = lease->mtu;
  97         return 0;
  98 }
  99
 100 int sd_dhcp_lease_get_servers(
 101                 sd_dhcp_lease *lease,
 102                 sd_dhcp_lease_server_type_t what,
 103                 const struct in_addr **addr) {
 104
 105         assert_return(lease, -EINVAL);
 106         assert_return(what >= 0, -EINVAL);
 107         assert_return(what < _SD_DHCP_LEASE_SERVER_TYPE_MAX, -EINVAL);
 108         assert_return(addr, -EINVAL);
 109
 110         if (lease->servers[what].size <= 0)
 111                 return -ENODATA;
 112
 113         *addr = lease->servers[what].addr;
 114         return (int) lease->servers[what].size;
 115 }
 116
 117 int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr) {
 118         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_DNS, addr);
 119 }
 120 int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr) {
 121         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_NTP, addr);
 122 }
 123 int sd_dhcp_lease_get_sip(sd_dhcp_lease *lease, const struct in_addr **addr) {
 124         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_SIP, addr);
 125 }
 126 int sd_dhcp_lease_get_pop3(sd_dhcp_lease *lease, const struct in_addr **addr) {
 127         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_POP3, addr);
 128 }
 129 int sd_dhcp_lease_get_smtp(sd_dhcp_lease *lease, const struct in_addr **addr) {
 130         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_SMTP, addr);
 131 }
 132 int sd_dhcp_lease_get_lpr(sd_dhcp_lease *lease, const struct in_addr **addr) {
 133         return sd_dhcp_lease_get_servers(lease, SD_DHCP_LEASE_LPR, addr);
 134 }
 135
 136 int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) {
 137         assert_return(lease, -EINVAL);
 138         assert_return(domainname, -EINVAL);
 139
 140         if (!lease->domainname)
 141                 return -ENODATA;
 142
 143         *domainname = lease->domainname;
 144         return 0;
 145 }
 146
 147 int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname) {
 148         assert_return(lease, -EINVAL);
 149         assert_return(hostname, -EINVAL);
 150
 151         if (!lease->hostname)
 152                 return -ENODATA;
 153
 154         *hostname = lease->hostname;
 155         return 0;
 156 }
 157
 158 int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path) {
 159         assert_return(lease, -EINVAL);
 160         assert_return(root_path, -EINVAL);
 161
 162         if (!lease->root_path)
 163                 return -ENODATA;
 164
 165         *root_path = lease->root_path;
 166         return 0;
 167 }
 168
 169 int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, const struct in_addr **addr) {
 170         assert_return(lease, -EINVAL);
 171         assert_return(addr, -EINVAL);
 172
 173         if (lease->router_size <= 0)
 174                 return -ENODATA;
 175
 176         *addr = lease->router;
 177         return (int) lease->router_size;
 178 }
 179
 180 int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) {
 181         assert_return(lease, -EINVAL);
 182         assert_return(addr, -EINVAL);
 183
 184         if (!lease->have_subnet_mask)
 185                 return -ENODATA;
 186
 187         addr->s_addr = lease->subnet_mask;
 188         return 0;
 189 }
 190
 191 int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr) {
 192         assert_return(lease, -EINVAL);
 193         assert_return(addr, -EINVAL);
 194
 195         if (lease->server_address == 0)
 196                 return -ENODATA;
 197
 198         addr->s_addr = lease->server_address;
 199         return 0;
 200 }
 201
 202 int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) {
 203         assert_return(lease, -EINVAL);
 204         assert_return(addr, -EINVAL);
 205
 206         if (lease->next_server == 0)
 207                 return -ENODATA;
 208
 209         addr->s_addr = lease->next_server;
 210         return 0;
 211 }
 212
 213 /*
 214  * The returned routes array must be freed by the caller.
 215  * Route objects have the same lifetime of the lease and must not be freed.
 216  */
 217 int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes) {
 218         sd_dhcp_route **ret;
 219         unsigned i;
 220
 221         assert_return(lease, -EINVAL);
 222         assert_return(routes, -EINVAL);
 223
 224         if (lease->static_route_size <= 0)
 225                 return -ENODATA;
 226
 227         ret = new(sd_dhcp_route *, lease->static_route_size);
 228         if (!ret)
 229                 return -ENOMEM;
 230
 231         for (i = 0; i < lease->static_route_size; i++)
 232                 ret[i] = &lease->static_route[i];
 233
 234         *routes = ret;
 235         return (int) lease->static_route_size;
 236 }
 237
 238 int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains) {
 239         size_t r;
 240
 241         assert_return(lease, -EINVAL);
 242         assert_return(domains, -EINVAL);
 243
 244         r = strv_length(lease->search_domains);
 245         if (r > 0) {
 246                 *domains = lease->search_domains;
 247                 return (int) r;
 248         }
 249
 250         return -ENODATA;
 251 }
 252
 253 int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len) {
 254         assert_return(lease, -EINVAL);
 255         assert_return(data, -EINVAL);
 256         assert_return(data_len, -EINVAL);
 257
 258         if (lease->vendor_specific_len <= 0)
 259                 return -ENODATA;
 260
 261         *data = lease->vendor_specific;
 262         *data_len = lease->vendor_specific_len;
 263         return 0;
 264 }
 265
 266 static sd_dhcp_lease *dhcp_lease_free(sd_dhcp_lease *lease) {
 267         assert(lease);
 268
 269         while (lease->private_options) {
 270                 struct sd_dhcp_raw_option *option = lease->private_options;
 271
 272                 LIST_REMOVE(options, lease->private_options, option);
 273
 274                 free(option->data);
 275                 free(option);
 276         }
 277
 278         free(lease->root_path);
 279         free(lease->router);
 280         free(lease->timezone);
 281         free(lease->hostname);
 282         free(lease->domainname);
 283
 284         for (sd_dhcp_lease_server_type_t i = 0; i < _SD_DHCP_LEASE_SERVER_TYPE_MAX; i++)
 285                 free(lease->servers[i].addr);
 286
 287         free(lease->static_route);
 288         free(lease->client_id);
 289         free(lease->vendor_specific);
 290         strv_free(lease->search_domains);
 291         return mfree(lease);
 292 }
 293
 294 DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_lease, sd_dhcp_lease, dhcp_lease_free);
 295
 296 static int lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) {
 297         assert(option);
 298         assert(ret);
 299
 300         if (len != 4)
 301                 return -EINVAL;
 302
 303         *ret = unaligned_read_be32((be32_t*) option);
 304         if (*ret < min)
 305                 *ret = min;
 306
 307         return 0;
 308 }
 309
 310 static int lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) {
 311         assert(option);
 312         assert(ret);
 313
 314         if (len != 2)
 315                 return -EINVAL;
 316
 317         *ret = unaligned_read_be16((be16_t*) option);
 318         if (*ret < min)
 319                 *ret = min;
 320
 321         return 0;
 322 }
 323
 324 static int lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) {
 325         assert(option);
 326         assert(ret);
 327
 328         if (len != 4)
 329                 return -EINVAL;
 330
 331         memcpy(ret, option, 4);
 332         return 0;
 333 }
 334
 335 static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
 336         assert(option);
 337         assert(ret);
 338
 339         if (len <= 0)
 340                 *ret = mfree(*ret);
 341         else {
 342                 char *string;
 343
 344                 /*
 345                  * One trailing NUL byte is OK, we don't mind. See:
 346                  * https://github.com/systemd/systemd/issues/1337
 347                  */
 348                 if (memchr(option, 0, len - 1))
 349                         return -EINVAL;
 350
 351                 string = memdup_suffix0((const char *) option, len);
 352                 if (!string)
 353                         return -ENOMEM;
 354
 355                 free_and_replace(*ret, string);
 356         }
 357
 358         return 0;
 359 }
 360
 361 static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
 362         _cleanup_free_ char *name = NULL, *normalized = NULL;
 363         int r;
 364
 365         assert(option);
 366         assert(ret);
 367
 368         r = lease_parse_string(option, len, &name);
 369         if (r < 0)
 370                 return r;
 371         if (!name) {
 372                 *ret = mfree(*ret);
 373                 return 0;
 374         }
 375
 376         r = dns_name_normalize(name, 0, &normalized);
 377         if (r < 0)
 378                 return r;
 379
 380         if (is_localhost(normalized))
 381                 return -EINVAL;
 382
 383         if (dns_name_is_root(normalized))
 384                 return -EINVAL;
 385
 386         free_and_replace(*ret, normalized);
 387
 388         return 0;
 389 }
 390
 391 static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
 392         assert(option || len == 0);
 393         assert(ret);
 394         assert(n_ret);
 395
 396         if (len <= 0) {
 397                 *ret = mfree(*ret);
 398                 *n_ret = 0;
 399         } else {
 400                 size_t n_addresses;
 401                 struct in_addr *addresses;
 402
 403                 if (len % 4 != 0)
 404                         return -EINVAL;
 405
 406                 n_addresses = len / 4;
 407
 408                 addresses = newdup(struct in_addr, option, n_addresses);
 409                 if (!addresses)
 410                         return -ENOMEM;
 411
 412                 free(*ret);
 413                 *ret = addresses;
 414                 *n_ret = n_addresses;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int lease_parse_sip_server(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
 421         assert(option || len == 0);
 422         assert(ret);
 423         assert(n_ret);
 424
 425         if (len <= 0)
 426                 return -EINVAL;
 427
 428         /* The SIP record is like the other, regular server records, but prefixed with a single "encoding"
 429          * byte that is either 0 or 1. We only support it to be 1 for now. Let's drop it and parse it like
 430          * the other fields */
 431
 432         if (option[0] != 1) { /* We only support IP address encoding for now */
 433                 *ret = mfree(*ret);
 434                 *n_ret = 0;
 435                 return 0;
 436         }
 437
 438         return lease_parse_in_addrs(option + 1, len - 1, ret, n_ret);
 439 }
 440
 441 static int lease_parse_routes(
 442                 const uint8_t *option, size_t len,
 443                 struct sd_dhcp_route **routes, size_t *routes_size) {
 444
 445         struct in_addr addr;
 446
 447         assert(option || len <= 0);
 448         assert(routes);
 449         assert(routes_size);
 450
 451         if (len <= 0)
 452                 return 0;
 453
 454         if (len % 8 != 0)
 455                 return -EINVAL;
 456
 457         if (!GREEDY_REALLOC(*routes, *routes_size + (len / 8)))
 458                 return -ENOMEM;
 459
 460         while (len >= 8) {
 461                 struct sd_dhcp_route *route = *routes + *routes_size;
 462                 int r;
 463
 464                 route->option = SD_DHCP_OPTION_STATIC_ROUTE;
 465                 r = in4_addr_default_prefixlen((struct in_addr*) option, &route->dst_prefixlen);
 466                 if (r < 0) {
 467                         log_debug("Failed to determine destination prefix length from class based IP, ignoring");
 468                         continue;
 469                 }
 470
 471                 assert_se(lease_parse_be32(option, 4, &addr.s_addr) >= 0);
 472                 route->dst_addr = inet_makeaddr(inet_netof(addr), 0);
 473                 option += 4;
 474
 475                 assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
 476                 option += 4;
 477
 478                 len -= 8;
 479                 (*routes_size)++;
 480         }
 481
 482         return 0;
 483 }
 484
 485 /* parses RFC3442 Classless Static Route Option */
 486 static int lease_parse_classless_routes(
 487                 const uint8_t *option, size_t len,
 488                 struct sd_dhcp_route **routes, size_t *routes_size) {
 489
 490         assert(option || len <= 0);
 491         assert(routes);
 492         assert(routes_size);
 493
 494         if (len <= 0)
 495                 return 0;
 496
 497         /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)*  */
 498
 499         while (len > 0) {
 500                 uint8_t dst_octets;
 501                 struct sd_dhcp_route *route;
 502
 503                 if (!GREEDY_REALLOC(*routes, *routes_size + 1))
 504                         return -ENOMEM;
 505
 506                 route = *routes + *routes_size;
 507                 route->option = SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE;
 508
 509                 dst_octets = (*option == 0 ? 0 : ((*option - 1) / 8) + 1);
 510                 route->dst_prefixlen = *option;
 511                 option++;
 512                 len--;
 513
 514                 /* can't have more than 4 octets in IPv4 */
 515                 if (dst_octets > 4 || len < dst_octets)
 516                         return -EINVAL;
 517
 518                 route->dst_addr.s_addr = 0;
 519                 memcpy(&route->dst_addr.s_addr, option, dst_octets);
 520                 option += dst_octets;
 521                 len -= dst_octets;
 522
 523                 if (len < 4)
 524                         return -EINVAL;
 525
 526                 assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
 527                 option += 4;
 528                 len -= 4;
 529
 530                 (*routes_size)++;
 531         }
 532
 533         return 0;
 534 }
 535
 536 int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
 537         sd_dhcp_lease *lease = userdata;
 538         int r;
 539
 540         assert(lease);
 541
 542         switch(code) {
 543
 544         case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
 545                 r = lease_parse_u32(option, len, &lease->lifetime, 1);
 546                 if (r < 0)
 547                         log_debug_errno(r, "Failed to parse lease time, ignoring: %m");
 548
 549                 break;
 550
 551         case SD_DHCP_OPTION_SERVER_IDENTIFIER:
 552                 r = lease_parse_be32(option, len, &lease->server_address);
 553                 if (r < 0)
 554                         log_debug_errno(r, "Failed to parse server identifier, ignoring: %m");
 555
 556                 break;
 557
 558         case SD_DHCP_OPTION_SUBNET_MASK:
 559                 r = lease_parse_be32(option, len, &lease->subnet_mask);
 560                 if (r < 0)
 561                         log_debug_errno(r, "Failed to parse subnet mask, ignoring: %m");
 562                 else
 563                         lease->have_subnet_mask = true;
 564                 break;
 565
 566         case SD_DHCP_OPTION_BROADCAST:
 567                 r = lease_parse_be32(option, len, &lease->broadcast);
 568                 if (r < 0)
 569                         log_debug_errno(r, "Failed to parse broadcast address, ignoring: %m");
 570                 else
 571                         lease->have_broadcast = true;
 572                 break;
 573
 574         case SD_DHCP_OPTION_ROUTER:
 575                 r = lease_parse_in_addrs(option, len, &lease->router, &lease->router_size);
 576                 if (r < 0)
 577                         log_debug_errno(r, "Failed to parse router addresses, ignoring: %m");
 578                 break;
 579
 580         case SD_DHCP_OPTION_DOMAIN_NAME_SERVER:
 581                 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_DNS].addr, &lease->servers[SD_DHCP_LEASE_DNS].size);
 582                 if (r < 0)
 583                         log_debug_errno(r, "Failed to parse DNS server, ignoring: %m");
 584                 break;
 585
 586         case SD_DHCP_OPTION_NTP_SERVER:
 587                 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_NTP].addr, &lease->servers[SD_DHCP_LEASE_NTP].size);
 588                 if (r < 0)
 589                         log_debug_errno(r, "Failed to parse NTP server, ignoring: %m");
 590                 break;
 591
 592         case SD_DHCP_OPTION_SIP_SERVER:
 593                 r = lease_parse_sip_server(option, len, &lease->servers[SD_DHCP_LEASE_SIP].addr, &lease->servers[SD_DHCP_LEASE_SIP].size);
 594                 if (r < 0)
 595                         log_debug_errno(r, "Failed to parse SIP server, ignoring: %m");
 596                 break;
 597
 598         case SD_DHCP_OPTION_POP3_SERVER:
 599                 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_POP3].addr, &lease->servers[SD_DHCP_LEASE_POP3].size);
 600                 if (r < 0)
 601                         log_debug_errno(r, "Failed to parse POP3 server, ignoring: %m");
 602                 break;
 603
 604         case SD_DHCP_OPTION_SMTP_SERVER:
 605                 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_SMTP].addr, &lease->servers[SD_DHCP_LEASE_SMTP].size);
 606                 if (r < 0)
 607                         log_debug_errno(r, "Failed to parse SMTP server, ignoring: %m");
 608                 break;
 609
 610         case SD_DHCP_OPTION_LPR_SERVER:
 611                 r = lease_parse_in_addrs(option, len, &lease->servers[SD_DHCP_LEASE_LPR].addr, &lease->servers[SD_DHCP_LEASE_LPR].size);
 612                 if (r < 0)
 613                         log_debug_errno(r, "Failed to parse LPR server, ignoring: %m");
 614                 break;
 615
 616         case SD_DHCP_OPTION_STATIC_ROUTE:
 617                 r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size);
 618                 if (r < 0)
 619                         log_debug_errno(r, "Failed to parse static routes, ignoring: %m");
 620                 break;
 621
 622         case SD_DHCP_OPTION_INTERFACE_MTU:
 623                 r = lease_parse_u16(option, len, &lease->mtu, 68);
 624                 if (r < 0)
 625                         log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
 626                 if (lease->mtu < DHCP_DEFAULT_MIN_SIZE) {
 627                         log_debug("MTU value of %" PRIu16 " too small. Using default MTU value of %d instead.", lease->mtu, DHCP_DEFAULT_MIN_SIZE);
 628                         lease->mtu = DHCP_DEFAULT_MIN_SIZE;
 629                 }
 630
 631                 break;
 632
 633         case SD_DHCP_OPTION_DOMAIN_NAME:
 634                 r = lease_parse_domain(option, len, &lease->domainname);
 635                 if (r < 0) {
 636                         log_debug_errno(r, "Failed to parse domain name, ignoring: %m");
 637                         return 0;
 638                 }
 639
 640                 break;
 641
 642         case SD_DHCP_OPTION_DOMAIN_SEARCH_LIST:
 643                 r = dhcp_lease_parse_search_domains(option, len, &lease->search_domains);
 644                 if (r < 0)
 645                         log_debug_errno(r, "Failed to parse Domain Search List, ignoring: %m");
 646                 break;
 647
 648         case SD_DHCP_OPTION_HOST_NAME:
 649                 r = lease_parse_domain(option, len, &lease->hostname);
 650                 if (r < 0) {
 651                         log_debug_errno(r, "Failed to parse hostname, ignoring: %m");
 652                         return 0;
 653                 }
 654
 655                 break;
 656
 657         case SD_DHCP_OPTION_ROOT_PATH:
 658                 r = lease_parse_string(option, len, &lease->root_path);
 659                 if (r < 0)
 660                         log_debug_errno(r, "Failed to parse root path, ignoring: %m");
 661                 break;
 662
 663         case SD_DHCP_OPTION_RENEWAL_T1_TIME:
 664                 r = lease_parse_u32(option, len, &lease->t1, 1);
 665                 if (r < 0)
 666                         log_debug_errno(r, "Failed to parse T1 time, ignoring: %m");
 667                 break;
 668
 669         case SD_DHCP_OPTION_REBINDING_T2_TIME:
 670                 r = lease_parse_u32(option, len, &lease->t2, 1);
 671                 if (r < 0)
 672                         log_debug_errno(r, "Failed to parse T2 time, ignoring: %m");
 673                 break;
 674
 675         case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
 676                 r = lease_parse_classless_routes(
 677                                 option, len,
 678                                 &lease->static_route,
 679                                 &lease->static_route_size);
 680                 if (r < 0)
 681                         log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
 682                 break;
 683
 684         case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE: {
 685                 _cleanup_free_ char *tz = NULL;
 686
 687                 r = lease_parse_string(option, len, &tz);
 688                 if (r < 0) {
 689                         log_debug_errno(r, "Failed to parse timezone option, ignoring: %m");
 690                         return 0;
 691                 }
 692
 693                 if (!timezone_is_valid(tz, LOG_DEBUG)) {
 694                         log_debug_errno(r, "Timezone is not valid, ignoring: %m");
 695                         return 0;
 696                 }
 697
 698                 free_and_replace(lease->timezone, tz);
 699
 700                 break;
 701         }
 702
 703         case SD_DHCP_OPTION_VENDOR_SPECIFIC:
 704
 705                 if (len <= 0)
 706                         lease->vendor_specific = mfree(lease->vendor_specific);
 707                 else {
 708                         void *p;
 709
 710                         p = memdup(option, len);
 711                         if (!p)
 712                                 return -ENOMEM;
 713
 714                         free(lease->vendor_specific);
 715                         lease->vendor_specific = p;
 716                 }
 717
 718                 lease->vendor_specific_len = len;
 719                 break;
 720
 721         case SD_DHCP_OPTION_PRIVATE_BASE ... SD_DHCP_OPTION_PRIVATE_LAST:
 722                 r = dhcp_lease_insert_private_option(lease, code, option, len);
 723                 if (r < 0)
 724                         return r;
 725
 726                 break;
 727
 728         default:
 729                 log_debug("Ignoring option DHCP option %"PRIu8" while parsing.", code);
 730                 break;
 731         }
 732
 733         return 0;
 734 }
 735
 736 /* Parses compressed domain names. */
 737 int dhcp_lease_parse_search_domains(const uint8_t *option, size_t len, char ***domains) {
 738         _cleanup_strv_free_ char **names = NULL;
 739         size_t pos = 0, cnt = 0;
 740         int r;
 741
 742         assert(domains);
 743         assert_return(option && len > 0, -ENODATA);
 744
 745         while (pos < len) {
 746                 _cleanup_free_ char *name = NULL;
 747                 size_t n = 0;
 748                 size_t jump_barrier = pos, next_chunk = 0;
 749                 bool first = true;
 750
 751                 for (;;) {
 752                         uint8_t c;
 753                         c = option[pos++];
 754
 755                         if (c == 0) {
 756                                 /* End of name */
 757                                 break;
 758                         } else if (c <= 63) {
 759                                 const char *label;
 760
 761                                 /* Literal label */
 762                                 label = (const char*) (option + pos);
 763                                 pos += c;
 764                                 if (pos >= len)
 765                                         return -EBADMSG;
 766
 767                                 if (!GREEDY_REALLOC(name, n + !first + DNS_LABEL_ESCAPED_MAX))
 768                                         return -ENOMEM;
 769
 770                                 if (first)
 771                                         first = false;
 772                                 else
 773                                         name[n++] = '.';
 774
 775                                 r = dns_label_escape(label, c, name + n, DNS_LABEL_ESCAPED_MAX);
 776                                 if (r < 0)
 777                                         return r;
 778
 779                                 n += r;
 780                         } else if (FLAGS_SET(c, 0xc0)) {
 781                                 /* Pointer */
 782
 783                                 uint8_t d;
 784                                 uint16_t ptr;
 785
 786                                 if (pos >= len)
 787                                         return -EBADMSG;
 788
 789                                 d = option[pos++];
 790                                 ptr = (uint16_t) (c & ~0xc0) << 8 | (uint16_t) d;
 791
 792                                 /* Jumps are limited to a "prior occurrence" (RFC-1035 4.1.4) */
 793                                 if (ptr >= jump_barrier)
 794                                         return -EBADMSG;
 795                                 jump_barrier = ptr;
 796
 797                                 /* Save current location so we don't end up re-parsing what's parsed so far. */
 798                                 if (next_chunk == 0)
 799                                         next_chunk = pos;
 800
 801                                 pos = ptr;
 802                         } else
 803                                 return -EBADMSG;
 804                 }
 805
 806                 if (!GREEDY_REALLOC(name, n + 1))
 807                         return -ENOMEM;
 808                 name[n] = 0;
 809
 810                 r = strv_extend(&names, name);
 811                 if (r < 0)
 812                         return r;
 813
 814                 cnt++;
 815
 816                 if (next_chunk != 0)
 817                       pos = next_chunk;
 818         }
 819
 820         *domains = TAKE_PTR(names);
 821
 822         return cnt;
 823 }
 824
 825 int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len) {
 826         struct sd_dhcp_raw_option *cur, *option;
 827
 828         assert(lease);
 829
 830         LIST_FOREACH(options, cur, lease->private_options) {
 831                 if (tag < cur->tag)
 832                         break;
 833                 if (tag == cur->tag) {
 834                         log_debug("Ignoring duplicate option, tagged %i.", tag);
 835                         return 0;
 836                 }
 837         }
 838
 839         option = new(struct sd_dhcp_raw_option, 1);
 840         if (!option)
 841                 return -ENOMEM;
 842
 843         option->tag = tag;
 844         option->length = len;
 845         option->data = memdup(data, len);
 846         if (!option->data) {
 847                 free(option);
 848                 return -ENOMEM;
 849         }
 850
 851         LIST_INSERT_BEFORE(options, lease->private_options, cur, option);
 852         return 0;
 853 }
 854
 855 int dhcp_lease_new(sd_dhcp_lease **ret) {
 856         sd_dhcp_lease *lease;
 857
 858         lease = new0(sd_dhcp_lease, 1);
 859         if (!lease)
 860                 return -ENOMEM;
 861
 862         lease->n_ref = 1;
 863
 864         *ret = lease;
 865         return 0;
 866 }
 867
 868 int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
 869         _cleanup_(unlink_and_freep) char *temp_path = NULL;
 870         _cleanup_fclose_ FILE *f = NULL;
 871         struct sd_dhcp_raw_option *option;
 872         struct in_addr address;
 873         const struct in_addr *addresses;
 874         const void *client_id, *data;
 875         size_t client_id_len, data_len;
 876         char sbuf[INET_ADDRSTRLEN];
 877         const char *string;
 878         uint16_t mtu;
 879         _cleanup_free_ sd_dhcp_route **routes = NULL;
 880         char **search_domains = NULL;
 881         uint32_t t1, t2, lifetime;
 882         int r;
 883
 884         assert(lease);
 885         assert(lease_file);
 886
 887         r = fopen_temporary(lease_file, &f, &temp_path);
 888         if (r < 0)
 889                 return r;
 890
 891         (void) fchmod(fileno(f), 0644);
 892
 893         fprintf(f,
 894                 "# This is private data. Do not parse.\n");
 895
 896         r = sd_dhcp_lease_get_address(lease, &address);
 897         if (r >= 0)
 898                 fprintf(f, "ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
 899
 900         r = sd_dhcp_lease_get_netmask(lease, &address);
 901         if (r >= 0)
 902                 fprintf(f, "NETMASK=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
 903
 904         r = sd_dhcp_lease_get_router(lease, &addresses);
 905         if (r > 0) {
 906                 fputs("ROUTER=", f);
 907                 serialize_in_addrs(f, addresses, r, false, NULL);
 908                 fputc('\n', f);
 909         }
 910
 911         r = sd_dhcp_lease_get_server_identifier(lease, &address);
 912         if (r >= 0)
 913                 fprintf(f, "SERVER_ADDRESS=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
 914
 915         r = sd_dhcp_lease_get_next_server(lease, &address);
 916         if (r >= 0)
 917                 fprintf(f, "NEXT_SERVER=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
 918
 919         r = sd_dhcp_lease_get_broadcast(lease, &address);
 920         if (r >= 0)
 921                 fprintf(f, "BROADCAST=%s\n", inet_ntop(AF_INET, &address, sbuf, sizeof(sbuf)));
 922
 923         r = sd_dhcp_lease_get_mtu(lease, &mtu);
 924         if (r >= 0)
 925                 fprintf(f, "MTU=%" PRIu16 "\n", mtu);
 926
 927         r = sd_dhcp_lease_get_t1(lease, &t1);
 928         if (r >= 0)
 929                 fprintf(f, "T1=%" PRIu32 "\n", t1);
 930
 931         r = sd_dhcp_lease_get_t2(lease, &t2);
 932         if (r >= 0)
 933                 fprintf(f, "T2=%" PRIu32 "\n", t2);
 934
 935         r = sd_dhcp_lease_get_lifetime(lease, &lifetime);
 936         if (r >= 0)
 937                 fprintf(f, "LIFETIME=%" PRIu32 "\n", lifetime);
 938
 939         r = sd_dhcp_lease_get_dns(lease, &addresses);
 940         if (r > 0) {
 941                 fputs("DNS=", f);
 942                 serialize_in_addrs(f, addresses, r, false, NULL);
 943                 fputc('\n', f);
 944         }
 945
 946         r = sd_dhcp_lease_get_ntp(lease, &addresses);
 947         if (r > 0) {
 948                 fputs("NTP=", f);
 949                 serialize_in_addrs(f, addresses, r, false, NULL);
 950                 fputc('\n', f);
 951         }
 952
 953         r = sd_dhcp_lease_get_sip(lease, &addresses);
 954         if (r > 0) {
 955                 fputs("SIP=", f);
 956                 serialize_in_addrs(f, addresses, r, false, NULL);
 957                 fputc('\n', f);
 958         }
 959
 960         r = sd_dhcp_lease_get_domainname(lease, &string);
 961         if (r >= 0)
 962                 fprintf(f, "DOMAINNAME=%s\n", string);
 963
 964         r = sd_dhcp_lease_get_search_domains(lease, &search_domains);
 965         if (r > 0) {
 966                 fputs("DOMAIN_SEARCH_LIST=", f);
 967                 fputstrv(f, search_domains, NULL, NULL);
 968                 fputc('\n', f);
 969         }
 970
 971         r = sd_dhcp_lease_get_hostname(lease, &string);
 972         if (r >= 0)
 973                 fprintf(f, "HOSTNAME=%s\n", string);
 974
 975         r = sd_dhcp_lease_get_root_path(lease, &string);
 976         if (r >= 0)
 977                 fprintf(f, "ROOT_PATH=%s\n", string);
 978
 979         r = sd_dhcp_lease_get_routes(lease, &routes);
 980         if (r > 0)
 981                 serialize_dhcp_routes(f, "ROUTES", routes, r);
 982
 983         r = sd_dhcp_lease_get_timezone(lease, &string);
 984         if (r >= 0)
 985                 fprintf(f, "TIMEZONE=%s\n", string);
 986
 987         r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len);
 988         if (r >= 0) {
 989                 _cleanup_free_ char *client_id_hex = NULL;
 990
 991                 client_id_hex = hexmem(client_id, client_id_len);
 992                 if (!client_id_hex)
 993                         return -ENOMEM;
 994                 fprintf(f, "CLIENTID=%s\n", client_id_hex);
 995         }
 996
 997         r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len);
 998         if (r >= 0) {
 999                 _cleanup_free_ char *option_hex = NULL;
1000
1001                 option_hex = hexmem(data, data_len);
1002                 if (!option_hex)
1003                         return -ENOMEM;
1004                 fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex);
1005         }
1006
1007         LIST_FOREACH(options, option, lease->private_options) {
1008                 char key[STRLEN("OPTION_000")+1];
1009
1010                 xsprintf(key, "OPTION_%" PRIu8, option->tag);
1011                 r = serialize_dhcp_option(f, key, option->data, option->length);
1012                 if (r < 0)
1013                         return r;
1014         }
1015
1016         r = fflush_and_check(f);
1017         if (r < 0)
1018                 return r;
1019
1020         r = conservative_rename(temp_path, lease_file);
1021         if (r < 0)
1022                 return r;
1023
1024         temp_path = mfree(temp_path);
1025
1026         return 0;
1027 }
1028
1029 int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
1030         _cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
1031         _cleanup_free_ char
1032                 *address = NULL,
1033                 *router = NULL,
1034                 *netmask = NULL,
1035                 *server_address = NULL,
1036                 *next_server = NULL,
1037                 *broadcast = NULL,
1038                 *dns = NULL,
1039                 *ntp = NULL,
1040                 *sip = NULL,
1041                 *pop3 = NULL,
1042                 *smtp = NULL,
1043                 *lpr = NULL,
1044                 *mtu = NULL,
1045                 *routes = NULL,
1046                 *domains = NULL,
1047                 *client_id_hex = NULL,
1048                 *vendor_specific_hex = NULL,
1049                 *lifetime = NULL,
1050                 *t1 = NULL,
1051                 *t2 = NULL,
1052                 *options[SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1] = {};
1053
1054         int r, i;
1055
1056         assert(lease_file);
1057         assert(ret);
1058
1059         r = dhcp_lease_new(&lease);
1060         if (r < 0)
1061                 return r;
1062
1063         r = parse_env_file(NULL, lease_file,
1064                            "ADDRESS", &address,
1065                            "ROUTER", &router,
1066                            "NETMASK", &netmask,
1067                            "SERVER_ADDRESS", &server_address,
1068                            "NEXT_SERVER", &next_server,
1069                            "BROADCAST", &broadcast,
1070                            "DNS", &dns,
1071                            "NTP", &ntp,
1072                            "SIP", &sip,
1073                            "POP3", &pop3,
1074                            "SMTP", &smtp,
1075                            "LPR", &lpr,
1076                            "MTU", &mtu,
1077                            "DOMAINNAME", &lease->domainname,
1078                            "HOSTNAME", &lease->hostname,
1079                            "DOMAIN_SEARCH_LIST", &domains,
1080                            "ROOT_PATH", &lease->root_path,
1081                            "ROUTES", &routes,
1082                            "CLIENTID", &client_id_hex,
1083                            "TIMEZONE", &lease->timezone,
1084                            "VENDOR_SPECIFIC", &vendor_specific_hex,
1085                            "LIFETIME", &lifetime,
1086                            "T1", &t1,
1087                            "T2", &t2,
1088                            "OPTION_224", &options[0],
1089                            "OPTION_225", &options[1],
1090                            "OPTION_226", &options[2],
1091                            "OPTION_227", &options[3],
1092                            "OPTION_228", &options[4],
1093                            "OPTION_229", &options[5],
1094                            "OPTION_230", &options[6],
1095                            "OPTION_231", &options[7],
1096                            "OPTION_232", &options[8],
1097                            "OPTION_233", &options[9],
1098                            "OPTION_234", &options[10],
1099                            "OPTION_235", &options[11],
1100                            "OPTION_236", &options[12],
1101                            "OPTION_237", &options[13],
1102                            "OPTION_238", &options[14],
1103                            "OPTION_239", &options[15],
1104                            "OPTION_240", &options[16],
1105                            "OPTION_241", &options[17],
1106                            "OPTION_242", &options[18],
1107                            "OPTION_243", &options[19],
1108                            "OPTION_244", &options[20],
1109                            "OPTION_245", &options[21],
1110                            "OPTION_246", &options[22],
1111                            "OPTION_247", &options[23],
1112                            "OPTION_248", &options[24],
1113                            "OPTION_249", &options[25],
1114                            "OPTION_250", &options[26],
1115                            "OPTION_251", &options[27],
1116                            "OPTION_252", &options[28],
1117                            "OPTION_253", &options[29],
1118                            "OPTION_254", &options[30]);
1119         if (r < 0)
1120                 return r;
1121
1122         if (address) {
1123                 r = inet_pton(AF_INET, address, &lease->address);
1124                 if (r <= 0)
1125                         log_debug("Failed to parse address %s, ignoring.", address);
1126         }
1127
1128         if (router) {
1129                 r = deserialize_in_addrs(&lease->router, router);
1130                 if (r < 0)
1131                         log_debug_errno(r, "Failed to deserialize router addresses %s, ignoring: %m", router);
1132                 else
1133                         lease->router_size = r;
1134         }
1135
1136         if (netmask) {
1137                 r = inet_pton(AF_INET, netmask, &lease->subnet_mask);
1138                 if (r <= 0)
1139                         log_debug("Failed to parse netmask %s, ignoring.", netmask);
1140                 else
1141                         lease->have_subnet_mask = true;
1142         }
1143
1144         if (server_address) {
1145                 r = inet_pton(AF_INET, server_address, &lease->server_address);
1146                 if (r <= 0)
1147                         log_debug("Failed to parse server address %s, ignoring.", server_address);
1148         }
1149
1150         if (next_server) {
1151                 r = inet_pton(AF_INET, next_server, &lease->next_server);
1152                 if (r <= 0)
1153                         log_debug("Failed to parse next server %s, ignoring.", next_server);
1154         }
1155
1156         if (broadcast) {
1157                 r = inet_pton(AF_INET, broadcast, &lease->broadcast);
1158                 if (r <= 0)
1159                         log_debug("Failed to parse broadcast address %s, ignoring.", broadcast);
1160                 else
1161                         lease->have_broadcast = true;
1162         }
1163
1164         if (dns) {
1165                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_DNS].addr, dns);
1166                 if (r < 0)
1167                         log_debug_errno(r, "Failed to deserialize DNS servers %s, ignoring: %m", dns);
1168                 else
1169                         lease->servers[SD_DHCP_LEASE_DNS].size = r;
1170         }
1171
1172         if (ntp) {
1173                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_NTP].addr, ntp);
1174                 if (r < 0)
1175                         log_debug_errno(r, "Failed to deserialize NTP servers %s, ignoring: %m", ntp);
1176                 else
1177                         lease->servers[SD_DHCP_LEASE_NTP].size = r;
1178         }
1179
1180         if (sip) {
1181                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SIP].addr, sip);
1182                 if (r < 0)
1183                         log_debug_errno(r, "Failed to deserialize SIP servers %s, ignoring: %m", sip);
1184                 else
1185                         lease->servers[SD_DHCP_LEASE_SIP].size = r;
1186         }
1187
1188         if (pop3) {
1189                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_POP3].addr, pop3);
1190                 if (r < 0)
1191                         log_debug_errno(r, "Failed to deserialize POP3 server %s, ignoring: %m", pop3);
1192                 else
1193                         lease->servers[SD_DHCP_LEASE_POP3].size = r;
1194         }
1195
1196         if (smtp) {
1197                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_SMTP].addr, smtp);
1198                 if (r < 0)
1199                         log_debug_errno(r, "Failed to deserialize SMTP server %s, ignoring: %m", smtp);
1200                 else
1201                         lease->servers[SD_DHCP_LEASE_SMTP].size = r;
1202         }
1203
1204         if (lpr) {
1205                 r = deserialize_in_addrs(&lease->servers[SD_DHCP_LEASE_LPR].addr, lpr);
1206                 if (r < 0)
1207                         log_debug_errno(r, "Failed to deserialize LPR server %s, ignoring: %m", lpr);
1208                 else
1209                         lease->servers[SD_DHCP_LEASE_LPR].size = r;
1210         }
1211
1212         if (mtu) {
1213                 r = safe_atou16(mtu, &lease->mtu);
1214                 if (r < 0)
1215                         log_debug_errno(r, "Failed to parse MTU %s, ignoring: %m", mtu);
1216         }
1217
1218         if (domains) {
1219                 _cleanup_strv_free_ char **a = NULL;
1220                 a = strv_split(domains, " ");
1221                 if (!a)
1222                         return -ENOMEM;
1223
1224                 if (!strv_isempty(a))
1225                         lease->search_domains = TAKE_PTR(a);
1226         }
1227
1228         if (routes) {
1229                 r = deserialize_dhcp_routes(
1230                                 &lease->static_route,
1231                                 &lease->static_route_size,
1232                                 routes);
1233                 if (r < 0)
1234                         log_debug_errno(r, "Failed to parse DHCP routes %s, ignoring: %m", routes);
1235         }
1236
1237         if (lifetime) {
1238                 r = safe_atou32(lifetime, &lease->lifetime);
1239                 if (r < 0)
1240                         log_debug_errno(r, "Failed to parse lifetime %s, ignoring: %m", lifetime);
1241         }
1242
1243         if (t1) {
1244                 r = safe_atou32(t1, &lease->t1);
1245                 if (r < 0)
1246                         log_debug_errno(r, "Failed to parse T1 %s, ignoring: %m", t1);
1247         }
1248
1249         if (t2) {
1250                 r = safe_atou32(t2, &lease->t2);
1251                 if (r < 0)
1252                         log_debug_errno(r, "Failed to parse T2 %s, ignoring: %m", t2);
1253         }
1254
1255         if (client_id_hex) {
1256                 r = unhexmem(client_id_hex, SIZE_MAX, &lease->client_id, &lease->client_id_len);
1257                 if (r < 0)
1258                         log_debug_errno(r, "Failed to parse client ID %s, ignoring: %m", client_id_hex);
1259         }
1260
1261         if (vendor_specific_hex) {
1262                 r = unhexmem(vendor_specific_hex, SIZE_MAX, &lease->vendor_specific, &lease->vendor_specific_len);
1263                 if (r < 0)
1264                         log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
1265         }
1266
1267         for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
1268                 _cleanup_free_ void *data = NULL;
1269                 size_t len;
1270
1271                 if (!options[i])
1272                         continue;
1273
1274                 r = unhexmem(options[i], SIZE_MAX, &data, &len);
1275                 if (r < 0) {
1276                         log_debug_errno(r, "Failed to parse private DHCP option %s, ignoring: %m", options[i]);
1277                         continue;
1278                 }
1279
1280                 r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
1281                 if (r < 0)
1282                         return r;
1283         }
1284
1285         *ret = TAKE_PTR(lease);
1286
1287         return 0;
1288 }
1289
1290 int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
1291         struct in_addr address, mask;
1292         int r;
1293
1294         assert(lease);
1295
1296         if (lease->address == 0)
1297                 return -ENODATA;
1298
1299         address.s_addr = lease->address;
1300
1301         /* fall back to the default subnet masks based on address class */
1302         r = in4_addr_default_subnet_mask(&address, &mask);
1303         if (r < 0)
1304                 return r;
1305
1306         lease->subnet_mask = mask.s_addr;
1307         lease->have_subnet_mask = true;
1308
1309         return 0;
1310 }
1311
1312 int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len) {
1313         assert_return(lease, -EINVAL);
1314         assert_return(client_id, -EINVAL);
1315         assert_return(client_id_len, -EINVAL);
1316
1317         if (!lease->client_id)
1318                 return -ENODATA;
1319
1320         *client_id = lease->client_id;
1321         *client_id_len = lease->client_id_len;
1322
1323         return 0;
1324 }
1325
1326 int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const void *client_id, size_t client_id_len) {
1327         assert_return(lease, -EINVAL);
1328         assert_return(client_id || client_id_len <= 0, -EINVAL);
1329
1330         if (client_id_len <= 0)
1331                 lease->client_id = mfree(lease->client_id);
1332         else {
1333                 void *p;
1334
1335                 p = memdup(client_id, client_id_len);
1336                 if (!p)
1337                         return -ENOMEM;
1338
1339                 free(lease->client_id);
1340                 lease->client_id = p;
1341                 lease->client_id_len = client_id_len;
1342         }
1343
1344         return 0;
1345 }
1346
1347 int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
1348         assert_return(lease, -EINVAL);
1349         assert_return(tz, -EINVAL);
1350
1351         if (!lease->timezone)
1352                 return -ENODATA;
1353
1354         *tz = lease->timezone;
1355         return 0;
1356 }
1357
1358 int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination) {
1359         assert_return(route, -EINVAL);
1360         assert_return(destination, -EINVAL);
1361
1362         *destination = route->dst_addr;
1363         return 0;
1364 }
1365
1366 int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length) {
1367         assert_return(route, -EINVAL);
1368         assert_return(length, -EINVAL);
1369
1370         *length = route->dst_prefixlen;
1371         return 0;
1372 }
1373
1374 int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway) {
1375         assert_return(route, -EINVAL);
1376         assert_return(gateway, -EINVAL);
1377
1378         *gateway = route->gw_addr;
1379         return 0;
1380 }
1381
1382 int sd_dhcp_route_get_option(sd_dhcp_route *route) {
1383         assert_return(route, -EINVAL);
1384
1385         return route->option;
1386 }