src/resolve/resolved-bus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "alloc-util.h"
   4 #include "bus-common-errors.h"
   5 #include "bus-polkit.h"
   6 #include "bus-util.h"
   7 #include "dns-domain.h"
   8 #include "memory-util.h"
   9 #include "missing_capability.h"
  10 #include "resolved-bus.h"
  11 #include "resolved-def.h"
  12 #include "resolved-dns-synthesize.h"
  13 #include "resolved-dnssd-bus.h"
  14 #include "resolved-dnssd.h"
  15 #include "resolved-link-bus.h"
  16 #include "socket-netlink.h"
  17 #include "stdio-util.h"
  18 #include "strv.h"
  19 #include "syslog-util.h"
  20 #include "user-util.h"
  21 #include "utf8.h"
  22
  23 BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_resolve_support, resolve_support, ResolveSupport);
  24
  25 static int reply_query_state(DnsQuery *q) {
  26
  27         switch (q->state) {
  28
  29         case DNS_TRANSACTION_NO_SERVERS:
  30                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found");
  31
  32         case DNS_TRANSACTION_TIMEOUT:
  33                 return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out");
  34
  35         case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED:
  36                 return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
  37
  38         case DNS_TRANSACTION_INVALID_REPLY:
  39                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
  40
  41         case DNS_TRANSACTION_ERRNO:
  42                 return sd_bus_reply_method_errnof(q->request, q->answer_errno, "Lookup failed due to system error: %m");
  43
  44         case DNS_TRANSACTION_ABORTED:
  45                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "Query aborted");
  46
  47         case DNS_TRANSACTION_DNSSEC_FAILED:
  48                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_DNSSEC_FAILED, "DNSSEC validation failed: %s",
  49                                                   dnssec_result_to_string(q->answer_dnssec_result));
  50
  51         case DNS_TRANSACTION_NO_TRUST_ANCHOR:
  52                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_TRUST_ANCHOR, "No suitable trust anchor known");
  53
  54         case DNS_TRANSACTION_RR_TYPE_UNSUPPORTED:
  55                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_RR_TYPE_UNSUPPORTED, "Server does not support requested resource record type");
  56
  57         case DNS_TRANSACTION_NETWORK_DOWN:
  58                 return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NETWORK_DOWN, "Network is down");
  59
  60         case DNS_TRANSACTION_NOT_FOUND:
  61                 /* We return this as NXDOMAIN. This is only generated when a host doesn't implement LLMNR/TCP, and we
  62                  * thus quickly know that we cannot resolve an in-addr.arpa or ip6.arpa address. */
  63                 return sd_bus_reply_method_errorf(q->request, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", dns_query_string(q));
  64
  65         case DNS_TRANSACTION_RCODE_FAILURE: {
  66                 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
  67
  68                 if (q->answer_rcode == DNS_RCODE_NXDOMAIN)
  69                         sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", dns_query_string(q));
  70                 else {
  71                         const char *rc, *n;
  72                         char p[DECIMAL_STR_MAX(q->answer_rcode)];
  73
  74                         rc = dns_rcode_to_string(q->answer_rcode);
  75                         if (!rc) {
  76                                 xsprintf(p, "%i", q->answer_rcode);
  77                                 rc = p;
  78                         }
  79
  80                         n = strjoina(_BUS_ERROR_DNS, rc);
  81                         sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error %s", dns_query_string(q), rc);
  82                 }
  83
  84                 return sd_bus_reply_method_error(q->request, &error);
  85         }
  86
  87         case DNS_TRANSACTION_NULL:
  88         case DNS_TRANSACTION_PENDING:
  89         case DNS_TRANSACTION_VALIDATING:
  90         case DNS_TRANSACTION_SUCCESS:
  91         default:
  92                 assert_not_reached("Impossible state");
  93         }
  94 }
  95
  96 static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifindex) {
  97         int r;
  98
  99         assert(reply);
 100         assert(rr);
 101
 102         r = sd_bus_message_open_container(reply, 'r', "iiay");
 103         if (r < 0)
 104                 return r;
 105
 106         r = sd_bus_message_append(reply, "i", ifindex);
 107         if (r < 0)
 108                 return r;
 109
 110         if (rr->key->type == DNS_TYPE_A) {
 111                 r = sd_bus_message_append(reply, "i", AF_INET);
 112                 if (r < 0)
 113                         return r;
 114
 115                 r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr));
 116
 117         } else if (rr->key->type == DNS_TYPE_AAAA) {
 118                 r = sd_bus_message_append(reply, "i", AF_INET6);
 119                 if (r < 0)
 120                         return r;
 121
 122                 r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr));
 123         } else
 124                 return -EAFNOSUPPORT;
 125
 126         if (r < 0)
 127                 return r;
 128
 129         r = sd_bus_message_close_container(reply);
 130         if (r < 0)
 131                 return r;
 132
 133         return 0;
 134 }
 135
 136 static void bus_method_resolve_hostname_complete(DnsQuery *q) {
 137         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
 138         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 139         _cleanup_free_ char *normalized = NULL;
 140         DnsResourceRecord *rr;
 141         unsigned added = 0;
 142         int ifindex, r;
 143
 144         assert(q);
 145
 146         if (q->state != DNS_TRANSACTION_SUCCESS) {
 147                 r = reply_query_state(q);
 148                 goto finish;
 149         }
 150
 151         r = dns_query_process_cname(q);
 152         if (r == -ELOOP) {
 153                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
 154                 goto finish;
 155         }
 156         if (r < 0)
 157                 goto finish;
 158         if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */
 159                 return;
 160
 161         r = sd_bus_message_new_method_return(q->request, &reply);
 162         if (r < 0)
 163                 goto finish;
 164
 165         r = sd_bus_message_open_container(reply, 'a', "(iiay)");
 166         if (r < 0)
 167                 goto finish;
 168
 169         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
 170                 DnsQuestion *question;
 171
 172                 question = dns_query_question_for_protocol(q, q->answer_protocol);
 173
 174                 r = dns_question_matches_rr(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain));
 175                 if (r < 0)
 176                         goto finish;
 177                 if (r == 0)
 178                         continue;
 179
 180                 r = append_address(reply, rr, ifindex);
 181                 if (r < 0)
 182                         goto finish;
 183
 184                 if (!canonical)
 185                         canonical = dns_resource_record_ref(rr);
 186
 187                 added++;
 188         }
 189
 190         if (added <= 0) {
 191                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
 192                 goto finish;
 193         }
 194
 195         r = sd_bus_message_close_container(reply);
 196         if (r < 0)
 197                 goto finish;
 198
 199         /* The key names are not necessarily normalized, make sure that they are when we return them to our bus
 200          * clients. */
 201         r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized);
 202         if (r < 0)
 203                 goto finish;
 204
 205         /* Return the precise spelling and uppercasing and CNAME target reported by the server */
 206         assert(canonical);
 207         r = sd_bus_message_append(
 208                         reply, "st",
 209                         normalized,
 210                         SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q)));
 211         if (r < 0)
 212                 goto finish;
 213
 214         r = sd_bus_send(q->manager->bus, reply, NULL);
 215
 216 finish:
 217         if (r < 0) {
 218                 log_error_errno(r, "Failed to send hostname reply: %m");
 219                 sd_bus_reply_method_errno(q->request, r, NULL);
 220         }
 221
 222         dns_query_free(q);
 223 }
 224
 225 static int check_ifindex_flags(int ifindex, uint64_t *flags, uint64_t ok, sd_bus_error *error) {
 226         assert(flags);
 227
 228         if (ifindex < 0)
 229                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
 230
 231         if (*flags & ~(SD_RESOLVED_PROTOCOLS_ALL|SD_RESOLVED_NO_CNAME|ok))
 232                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter");
 233
 234         if ((*flags & SD_RESOLVED_PROTOCOLS_ALL) == 0) /* If no protocol is enabled, enable all */
 235                 *flags |= SD_RESOLVED_PROTOCOLS_ALL;
 236
 237         return 0;
 238 }
 239
 240 static int parse_as_address(sd_bus_message *m, int ifindex, const char *hostname, int family, uint64_t flags) {
 241         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 242         _cleanup_free_ char *canonical = NULL;
 243         union in_addr_union parsed;
 244         int r, ff, parsed_ifindex = 0;
 245
 246         /* Check if the hostname is actually already an IP address formatted as string. In that case just parse it,
 247          * let's not attempt to look it up. */
 248
 249         r = in_addr_ifindex_from_string_auto(hostname, &ff, &parsed, &parsed_ifindex);
 250         if (r < 0) /* not an address */
 251                 return 0;
 252
 253         if (family != AF_UNSPEC && ff != family)
 254                 return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address is not of the requested family.");
 255         if (ifindex > 0 && parsed_ifindex > 0 && parsed_ifindex != ifindex)
 256                 return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address interface index does not match requested interface.");
 257
 258         if (parsed_ifindex > 0)
 259                 ifindex = parsed_ifindex;
 260
 261         r = sd_bus_message_new_method_return(m, &reply);
 262         if (r < 0)
 263                 return r;
 264
 265         r = sd_bus_message_open_container(reply, 'a', "(iiay)");
 266         if (r < 0)
 267                 return r;
 268
 269         r = sd_bus_message_open_container(reply, 'r', "iiay");
 270         if (r < 0)
 271                 return r;
 272
 273         r = sd_bus_message_append(reply, "ii", ifindex, ff);
 274         if (r < 0)
 275                 return r;
 276
 277         r = sd_bus_message_append_array(reply, 'y', &parsed, FAMILY_ADDRESS_SIZE(ff));
 278         if (r < 0)
 279                 return r;
 280
 281         r = sd_bus_message_close_container(reply);
 282         if (r < 0)
 283                 return r;
 284
 285         r = sd_bus_message_close_container(reply);
 286         if (r < 0)
 287                 return r;
 288
 289         /* When an IP address is specified we just return it as canonical name, in order to avoid a DNS
 290          * look-up. However, we reformat it to make sure it's in a truly canonical form (i.e. on IPv6 the inner
 291          * omissions are always done the same way). */
 292         r = in_addr_ifindex_to_string(ff, &parsed, ifindex, &canonical);
 293         if (r < 0)
 294                 return r;
 295
 296         r = sd_bus_message_append(reply, "st", canonical,
 297                                   SD_RESOLVED_FLAGS_MAKE(dns_synthesize_protocol(flags), ff, true));
 298         if (r < 0)
 299                 return r;
 300
 301         return sd_bus_send(sd_bus_message_get_bus(m), reply, NULL);
 302 }
 303
 304 static int bus_method_resolve_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 305         _cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL;
 306         Manager *m = userdata;
 307         const char *hostname;
 308         int family, ifindex;
 309         uint64_t flags;
 310         DnsQuery *q;
 311         int r;
 312
 313         assert(message);
 314         assert(m);
 315
 316         assert_cc(sizeof(int) == sizeof(int32_t));
 317
 318         r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags);
 319         if (r < 0)
 320                 return r;
 321
 322         if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
 323                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
 324
 325         r = check_ifindex_flags(ifindex, &flags, SD_RESOLVED_NO_SEARCH, error);
 326         if (r < 0)
 327                 return r;
 328
 329         r = parse_as_address(message, ifindex, hostname, family, flags);
 330         if (r != 0)
 331                 return r;
 332
 333         r = dns_name_is_valid(hostname);
 334         if (r < 0)
 335                 return r;
 336         if (r == 0)
 337                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname);
 338
 339         r = dns_question_new_address(&question_utf8, family, hostname, false);
 340         if (r < 0)
 341                 return r;
 342
 343         r = dns_question_new_address(&question_idna, family, hostname, true);
 344         if (r < 0 && r != -EALREADY)
 345                 return r;
 346
 347         r = dns_query_new(m, &q, question_utf8, question_idna ?: question_utf8, ifindex, flags);
 348         if (r < 0)
 349                 return r;
 350
 351         q->request = sd_bus_message_ref(message);
 352         q->request_family = family;
 353         q->complete = bus_method_resolve_hostname_complete;
 354         q->suppress_unroutable_family = family == AF_UNSPEC;
 355
 356         r = dns_query_bus_track(q, message);
 357         if (r < 0)
 358                 goto fail;
 359
 360         r = dns_query_go(q);
 361         if (r < 0)
 362                 goto fail;
 363
 364         return 1;
 365
 366 fail:
 367         dns_query_free(q);
 368         return r;
 369 }
 370
 371 static void bus_method_resolve_address_complete(DnsQuery *q) {
 372         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 373         DnsQuestion *question;
 374         DnsResourceRecord *rr;
 375         unsigned added = 0;
 376         int ifindex, r;
 377
 378         assert(q);
 379
 380         if (q->state != DNS_TRANSACTION_SUCCESS) {
 381                 r = reply_query_state(q);
 382                 goto finish;
 383         }
 384
 385         r = dns_query_process_cname(q);
 386         if (r == -ELOOP) {
 387                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
 388                 goto finish;
 389         }
 390         if (r < 0)
 391                 goto finish;
 392         if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */
 393                 return;
 394
 395         r = sd_bus_message_new_method_return(q->request, &reply);
 396         if (r < 0)
 397                 goto finish;
 398
 399         r = sd_bus_message_open_container(reply, 'a', "(is)");
 400         if (r < 0)
 401                 goto finish;
 402
 403         question = dns_query_question_for_protocol(q, q->answer_protocol);
 404
 405         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
 406                 _cleanup_free_ char *normalized = NULL;
 407
 408                 r = dns_question_matches_rr(question, rr, NULL);
 409                 if (r < 0)
 410                         goto finish;
 411                 if (r == 0)
 412                         continue;
 413
 414                 r = dns_name_normalize(rr->ptr.name, 0, &normalized);
 415                 if (r < 0)
 416                         goto finish;
 417
 418                 r = sd_bus_message_append(reply, "(is)", ifindex, normalized);
 419                 if (r < 0)
 420                         goto finish;
 421
 422                 added++;
 423         }
 424
 425         if (added <= 0) {
 426                 _cleanup_free_ char *ip = NULL;
 427
 428                 (void) in_addr_to_string(q->request_family, &q->request_address, &ip);
 429                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR,
 430                                                "Address '%s' does not have any RR of requested type", strnull(ip));
 431                 goto finish;
 432         }
 433
 434         r = sd_bus_message_close_container(reply);
 435         if (r < 0)
 436                 goto finish;
 437
 438         r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q)));
 439         if (r < 0)
 440                 goto finish;
 441
 442         r = sd_bus_send(q->manager->bus, reply, NULL);
 443
 444 finish:
 445         if (r < 0) {
 446                 log_error_errno(r, "Failed to send address reply: %m");
 447                 sd_bus_reply_method_errno(q->request, r, NULL);
 448         }
 449
 450         dns_query_free(q);
 451 }
 452
 453 static int bus_method_resolve_address(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 454         _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
 455         Manager *m = userdata;
 456         int family, ifindex;
 457         uint64_t flags;
 458         const void *d;
 459         DnsQuery *q;
 460         size_t sz;
 461         int r;
 462
 463         assert(message);
 464         assert(m);
 465
 466         assert_cc(sizeof(int) == sizeof(int32_t));
 467
 468         r = sd_bus_message_read(message, "ii", &ifindex, &family);
 469         if (r < 0)
 470                 return r;
 471
 472         if (!IN_SET(family, AF_INET, AF_INET6))
 473                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
 474
 475         r = sd_bus_message_read_array(message, 'y', &d, &sz);
 476         if (r < 0)
 477                 return r;
 478
 479         if (sz != FAMILY_ADDRESS_SIZE(family))
 480                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size");
 481
 482         r = sd_bus_message_read(message, "t", &flags);
 483         if (r < 0)
 484                 return r;
 485
 486         r = check_ifindex_flags(ifindex, &flags, 0, error);
 487         if (r < 0)
 488                 return r;
 489
 490         r = dns_question_new_reverse(&question, family, d);
 491         if (r < 0)
 492                 return r;
 493
 494         r = dns_query_new(m, &q, question, question, ifindex, flags|SD_RESOLVED_NO_SEARCH);
 495         if (r < 0)
 496                 return r;
 497
 498         q->request = sd_bus_message_ref(message);
 499         q->request_family = family;
 500         memcpy(&q->request_address, d, sz);
 501         q->complete = bus_method_resolve_address_complete;
 502
 503         r = dns_query_bus_track(q, message);
 504         if (r < 0)
 505                 goto fail;
 506
 507         r = dns_query_go(q);
 508         if (r < 0)
 509                 goto fail;
 510
 511         return 1;
 512
 513 fail:
 514         dns_query_free(q);
 515         return r;
 516 }
 517
 518 static int bus_message_append_rr(sd_bus_message *m, DnsResourceRecord *rr, int ifindex) {
 519         int r;
 520
 521         assert(m);
 522         assert(rr);
 523
 524         r = sd_bus_message_open_container(m, 'r', "iqqay");
 525         if (r < 0)
 526                 return r;
 527
 528         r = sd_bus_message_append(m, "iqq",
 529                                   ifindex,
 530                                   rr->key->class,
 531                                   rr->key->type);
 532         if (r < 0)
 533                 return r;
 534
 535         r = dns_resource_record_to_wire_format(rr, false);
 536         if (r < 0)
 537                 return r;
 538
 539         r = sd_bus_message_append_array(m, 'y', rr->wire_format, rr->wire_format_size);
 540         if (r < 0)
 541                 return r;
 542
 543         return sd_bus_message_close_container(m);
 544 }
 545
 546 static void bus_method_resolve_record_complete(DnsQuery *q) {
 547         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 548         DnsResourceRecord *rr;
 549         DnsQuestion *question;
 550         unsigned added = 0;
 551         int ifindex;
 552         int r;
 553
 554         assert(q);
 555
 556         if (q->state != DNS_TRANSACTION_SUCCESS) {
 557                 r = reply_query_state(q);
 558                 goto finish;
 559         }
 560
 561         r = dns_query_process_cname(q);
 562         if (r == -ELOOP) {
 563                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
 564                 goto finish;
 565         }
 566         if (r < 0)
 567                 goto finish;
 568         if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */
 569                 return;
 570
 571         r = sd_bus_message_new_method_return(q->request, &reply);
 572         if (r < 0)
 573                 goto finish;
 574
 575         r = sd_bus_message_open_container(reply, 'a', "(iqqay)");
 576         if (r < 0)
 577                 goto finish;
 578
 579         question = dns_query_question_for_protocol(q, q->answer_protocol);
 580
 581         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
 582                 r = dns_question_matches_rr(question, rr, NULL);
 583                 if (r < 0)
 584                         goto finish;
 585                 if (r == 0)
 586                         continue;
 587
 588                 r = bus_message_append_rr(reply, rr, ifindex);
 589                 if (r < 0)
 590                         goto finish;
 591
 592                 added++;
 593         }
 594
 595         if (added <= 0) {
 596                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "Name '%s' does not have any RR of the requested type", dns_query_string(q));
 597                 goto finish;
 598         }
 599
 600         r = sd_bus_message_close_container(reply);
 601         if (r < 0)
 602                 goto finish;
 603
 604         r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q)));
 605         if (r < 0)
 606                 goto finish;
 607
 608         r = sd_bus_send(q->manager->bus, reply, NULL);
 609
 610 finish:
 611         if (r < 0) {
 612                 log_error_errno(r, "Failed to send record reply: %m");
 613                 sd_bus_reply_method_errno(q->request, r, NULL);
 614         }
 615
 616         dns_query_free(q);
 617 }
 618
 619 static int bus_method_resolve_record(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 620         _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
 621         _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
 622         Manager *m = userdata;
 623         uint16_t class, type;
 624         const char *name;
 625         int r, ifindex;
 626         uint64_t flags;
 627         DnsQuery *q;
 628
 629         assert(message);
 630         assert(m);
 631
 632         assert_cc(sizeof(int) == sizeof(int32_t));
 633
 634         r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags);
 635         if (r < 0)
 636                 return r;
 637
 638         r = dns_name_is_valid(name);
 639         if (r < 0)
 640                 return r;
 641         if (r == 0)
 642                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name);
 643
 644         if (!dns_type_is_valid_query(type))
 645                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified resource record type %" PRIu16 " may not be used in a query.", type);
 646         if (dns_type_is_zone_transer(type))
 647                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Zone transfers not permitted via this programming interface.");
 648         if (dns_type_is_obsolete(type))
 649                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Specified DNS resource record type %" PRIu16 " is obsolete.", type);
 650
 651         r = check_ifindex_flags(ifindex, &flags, 0, error);
 652         if (r < 0)
 653                 return r;
 654
 655         question = dns_question_new(1);
 656         if (!question)
 657                 return -ENOMEM;
 658
 659         key = dns_resource_key_new(class, type, name);
 660         if (!key)
 661                 return -ENOMEM;
 662
 663         r = dns_question_add(question, key);
 664         if (r < 0)
 665                 return r;
 666
 667         r = dns_query_new(m, &q, question, question, ifindex, flags|SD_RESOLVED_NO_SEARCH);
 668         if (r < 0)
 669                 return r;
 670
 671         /* Let's request that the TTL is fixed up for locally cached entries, after all we return it in the wire format
 672          * blob */
 673         q->clamp_ttl = true;
 674
 675         q->request = sd_bus_message_ref(message);
 676         q->complete = bus_method_resolve_record_complete;
 677
 678         r = dns_query_bus_track(q, message);
 679         if (r < 0)
 680                 goto fail;
 681
 682         r = dns_query_go(q);
 683         if (r < 0)
 684                 goto fail;
 685
 686         return 1;
 687
 688 fail:
 689         dns_query_free(q);
 690         return r;
 691 }
 692
 693 static int append_srv(DnsQuery *q, sd_bus_message *reply, DnsResourceRecord *rr) {
 694         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
 695         _cleanup_free_ char *normalized = NULL;
 696         DnsQuery *aux;
 697         int r;
 698
 699         assert(q);
 700         assert(reply);
 701         assert(rr);
 702         assert(rr->key);
 703
 704         if (rr->key->type != DNS_TYPE_SRV)
 705                 return 0;
 706
 707         if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
 708                 /* First, let's see if we could find an appropriate A or AAAA
 709                  * record for the SRV record */
 710                 LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
 711                         DnsResourceRecord *zz;
 712                         DnsQuestion *question;
 713
 714                         if (aux->state != DNS_TRANSACTION_SUCCESS)
 715                                 continue;
 716                         if (aux->auxiliary_result != 0)
 717                                 continue;
 718
 719                         question = dns_query_question_for_protocol(aux, aux->answer_protocol);
 720
 721                         r = dns_name_equal(dns_question_first_name(question), rr->srv.name);
 722                         if (r < 0)
 723                                 return r;
 724                         if (r == 0)
 725                                 continue;
 726
 727                         DNS_ANSWER_FOREACH(zz, aux->answer) {
 728
 729                                 r = dns_question_matches_rr(question, zz, NULL);
 730                                 if (r < 0)
 731                                         return r;
 732                                 if (r == 0)
 733                                         continue;
 734
 735                                 canonical = dns_resource_record_ref(zz);
 736                                 break;
 737                         }
 738
 739                         if (canonical)
 740                                 break;
 741                 }
 742
 743                 /* Is there are successful A/AAAA lookup for this SRV RR? If not, don't add it */
 744                 if (!canonical)
 745                         return 0;
 746         }
 747
 748         r = sd_bus_message_open_container(reply, 'r', "qqqsa(iiay)s");
 749         if (r < 0)
 750                 return r;
 751
 752         r = dns_name_normalize(rr->srv.name, 0, &normalized);
 753         if (r < 0)
 754                 return r;
 755
 756         r = sd_bus_message_append(
 757                         reply,
 758                         "qqqs",
 759                         rr->srv.priority, rr->srv.weight, rr->srv.port, normalized);
 760         if (r < 0)
 761                 return r;
 762
 763         r = sd_bus_message_open_container(reply, 'a', "(iiay)");
 764         if (r < 0)
 765                 return r;
 766
 767         if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
 768                 LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
 769                         DnsResourceRecord *zz;
 770                         DnsQuestion *question;
 771                         int ifindex;
 772
 773                         if (aux->state != DNS_TRANSACTION_SUCCESS)
 774                                 continue;
 775                         if (aux->auxiliary_result != 0)
 776                                 continue;
 777
 778                         question = dns_query_question_for_protocol(aux, aux->answer_protocol);
 779
 780                         r = dns_name_equal(dns_question_first_name(question), rr->srv.name);
 781                         if (r < 0)
 782                                 return r;
 783                         if (r == 0)
 784                                 continue;
 785
 786                         DNS_ANSWER_FOREACH_IFINDEX(zz, ifindex, aux->answer) {
 787
 788                                 r = dns_question_matches_rr(question, zz, NULL);
 789                                 if (r < 0)
 790                                         return r;
 791                                 if (r == 0)
 792                                         continue;
 793
 794                                 r = append_address(reply, zz, ifindex);
 795                                 if (r < 0)
 796                                         return r;
 797                         }
 798                 }
 799         }
 800
 801         r = sd_bus_message_close_container(reply);
 802         if (r < 0)
 803                 return r;
 804
 805         if (canonical) {
 806                 normalized = mfree(normalized);
 807
 808                 r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized);
 809                 if (r < 0)
 810                         return r;
 811         }
 812
 813         /* Note that above we appended the hostname as encoded in the
 814          * SRV, and here the canonical hostname this maps to. */
 815         r = sd_bus_message_append(reply, "s", normalized);
 816         if (r < 0)
 817                 return r;
 818
 819         r = sd_bus_message_close_container(reply);
 820         if (r < 0)
 821                 return r;
 822
 823         return 1;
 824 }
 825
 826 static int append_txt(sd_bus_message *reply, DnsResourceRecord *rr) {
 827         DnsTxtItem *i;
 828         int r;
 829
 830         assert(reply);
 831         assert(rr);
 832         assert(rr->key);
 833
 834         if (rr->key->type != DNS_TYPE_TXT)
 835                 return 0;
 836
 837         LIST_FOREACH(items, i, rr->txt.items) {
 838
 839                 if (i->length <= 0)
 840                         continue;
 841
 842                 r = sd_bus_message_append_array(reply, 'y', i->data, i->length);
 843                 if (r < 0)
 844                         return r;
 845         }
 846
 847         return 1;
 848 }
 849
 850 static void resolve_service_all_complete(DnsQuery *q) {
 851         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
 852         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 853         _cleanup_free_ char *name = NULL, *type = NULL, *domain = NULL;
 854         DnsQuestion *question;
 855         DnsResourceRecord *rr;
 856         unsigned added = 0;
 857         DnsQuery *aux;
 858         int r;
 859
 860         assert(q);
 861
 862         if (q->block_all_complete > 0)
 863                 return;
 864
 865         if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
 866                 DnsQuery *bad = NULL;
 867                 bool have_success = false;
 868
 869                 LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
 870
 871                         switch (aux->state) {
 872
 873                         case DNS_TRANSACTION_PENDING:
 874                                 /* If an auxiliary query is still pending, let's wait */
 875                                 return;
 876
 877                         case DNS_TRANSACTION_SUCCESS:
 878                                 if (aux->auxiliary_result == 0)
 879                                         have_success = true;
 880                                 else
 881                                         bad = aux;
 882                                 break;
 883
 884                         default:
 885                                 bad = aux;
 886                                 break;
 887                         }
 888                 }
 889
 890                 if (!have_success) {
 891                         /* We can only return one error, hence pick the last error we encountered */
 892
 893                         assert(bad);
 894
 895                         if (bad->state == DNS_TRANSACTION_SUCCESS) {
 896                                 assert(bad->auxiliary_result != 0);
 897
 898                                 if (bad->auxiliary_result == -ELOOP) {
 899                                         r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(bad));
 900                                         goto finish;
 901                                 }
 902
 903                                 r = bad->auxiliary_result;
 904                                 goto finish;
 905                         }
 906
 907                         r = reply_query_state(bad);
 908                         goto finish;
 909                 }
 910         }
 911
 912         r = sd_bus_message_new_method_return(q->request, &reply);
 913         if (r < 0)
 914                 goto finish;
 915
 916         r = sd_bus_message_open_container(reply, 'a', "(qqqsa(iiay)s)");
 917         if (r < 0)
 918                 goto finish;
 919
 920         question = dns_query_question_for_protocol(q, q->answer_protocol);
 921         DNS_ANSWER_FOREACH(rr, q->answer) {
 922                 r = dns_question_matches_rr(question, rr, NULL);
 923                 if (r < 0)
 924                         goto finish;
 925                 if (r == 0)
 926                         continue;
 927
 928                 r = append_srv(q, reply, rr);
 929                 if (r < 0)
 930                         goto finish;
 931                 if (r == 0) /* not an SRV record */
 932                         continue;
 933
 934                 if (!canonical)
 935                         canonical = dns_resource_record_ref(rr);
 936
 937                 added++;
 938         }
 939
 940         if (added <= 0) {
 941                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
 942                 goto finish;
 943         }
 944
 945         r = sd_bus_message_close_container(reply);
 946         if (r < 0)
 947                 goto finish;
 948
 949         r = sd_bus_message_open_container(reply, 'a', "ay");
 950         if (r < 0)
 951                 goto finish;
 952
 953         DNS_ANSWER_FOREACH(rr, q->answer) {
 954                 r = dns_question_matches_rr(question, rr, NULL);
 955                 if (r < 0)
 956                         goto finish;
 957                 if (r == 0)
 958                         continue;
 959
 960                 r = append_txt(reply, rr);
 961                 if (r < 0)
 962                         goto finish;
 963         }
 964
 965         r = sd_bus_message_close_container(reply);
 966         if (r < 0)
 967                 goto finish;
 968
 969         assert(canonical);
 970         r = dns_service_split(dns_resource_key_name(canonical->key), &name, &type, &domain);
 971         if (r < 0)
 972                 goto finish;
 973
 974         r = sd_bus_message_append(
 975                         reply,
 976                         "ssst",
 977                         name, type, domain,
 978                         SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q)));
 979         if (r < 0)
 980                 goto finish;
 981
 982         r = sd_bus_send(q->manager->bus, reply, NULL);
 983
 984 finish:
 985         if (r < 0) {
 986                 log_error_errno(r, "Failed to send service reply: %m");
 987                 sd_bus_reply_method_errno(q->request, r, NULL);
 988         }
 989
 990         dns_query_free(q);
 991 }
 992
 993 static void resolve_service_hostname_complete(DnsQuery *q) {
 994         int r;
 995
 996         assert(q);
 997         assert(q->auxiliary_for);
 998
 999         if (q->state != DNS_TRANSACTION_SUCCESS) {
1000                 resolve_service_all_complete(q->auxiliary_for);
1001                 return;
1002         }
1003
1004         r = dns_query_process_cname(q);
1005         if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */
1006                 return;
1007
1008         /* This auxiliary lookup is finished or failed, let's see if all are finished now. */
1009         q->auxiliary_result = r;
1010         resolve_service_all_complete(q->auxiliary_for);
1011 }
1012
1013 static int resolve_service_hostname(DnsQuery *q, DnsResourceRecord *rr, int ifindex) {
1014         _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
1015         DnsQuery *aux;
1016         int r;
1017
1018         assert(q);
1019         assert(rr);
1020         assert(rr->key);
1021         assert(rr->key->type == DNS_TYPE_SRV);
1022
1023         /* OK, we found an SRV record for the service. Let's resolve
1024          * the hostname included in it */
1025
1026         r = dns_question_new_address(&question, q->request_family, rr->srv.name, false);
1027         if (r < 0)
1028                 return r;
1029
1030         r = dns_query_new(q->manager, &aux, question, question, ifindex, q->flags|SD_RESOLVED_NO_SEARCH);
1031         if (r < 0)
1032                 return r;
1033
1034         aux->request_family = q->request_family;
1035         aux->complete = resolve_service_hostname_complete;
1036
1037         r = dns_query_make_auxiliary(aux, q);
1038         if (r == -EAGAIN) {
1039                 /* Too many auxiliary lookups? If so, don't complain,
1040                  * let's just not add this one, we already have more
1041                  * than enough */
1042
1043                 dns_query_free(aux);
1044                 return 0;
1045         }
1046         if (r < 0)
1047                 goto fail;
1048
1049         /* Note that auxiliary queries do not track the original bus
1050          * client, only the primary request does that. */
1051
1052         r = dns_query_go(aux);
1053         if (r < 0)
1054                 goto fail;
1055
1056         return 1;
1057
1058 fail:
1059         dns_query_free(aux);
1060         return r;
1061 }
1062
1063 static void bus_method_resolve_service_complete(DnsQuery *q) {
1064         bool has_root_domain = false;
1065         DnsResourceRecord *rr;
1066         DnsQuestion *question;
1067         unsigned found = 0;
1068         int ifindex, r;
1069
1070         assert(q);
1071
1072         if (q->state != DNS_TRANSACTION_SUCCESS) {
1073                 r = reply_query_state(q);
1074                 goto finish;
1075         }
1076
1077         r = dns_query_process_cname(q);
1078         if (r == -ELOOP) {
1079                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
1080                 goto finish;
1081         }
1082         if (r < 0)
1083                 goto finish;
1084         if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */
1085                 return;
1086
1087         question = dns_query_question_for_protocol(q, q->answer_protocol);
1088
1089         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
1090                 r = dns_question_matches_rr(question, rr, NULL);
1091                 if (r < 0)
1092                         goto finish;
1093                 if (r == 0)
1094                         continue;
1095
1096                 if (rr->key->type != DNS_TYPE_SRV)
1097                         continue;
1098
1099                 if (dns_name_is_root(rr->srv.name)) {
1100                         has_root_domain = true;
1101                         continue;
1102                 }
1103
1104                 if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
1105                         q->block_all_complete++;
1106                         r = resolve_service_hostname(q, rr, ifindex);
1107                         q->block_all_complete--;
1108
1109                         if (r < 0)
1110                                 goto finish;
1111                 }
1112
1113                 found++;
1114         }
1115
1116         if (has_root_domain && found <= 0) {
1117                 /* If there's exactly one SRV RR and it uses
1118                  * the root domain as hostname, then the
1119                  * service is explicitly not offered on the
1120                  * domain. Report this as a recognizable
1121                  * error. See RFC 2782, Section "Usage
1122                  * Rules". */
1123                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_SERVICE, "'%s' does not provide the requested service", dns_query_string(q));
1124                 goto finish;
1125         }
1126
1127         if (found <= 0) {
1128                 r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
1129                 goto finish;
1130         }
1131
1132         /* Maybe we are already finished? check now... */
1133         resolve_service_all_complete(q);
1134         return;
1135
1136 finish:
1137         if (r < 0) {
1138                 log_error_errno(r, "Failed to send service reply: %m");
1139                 sd_bus_reply_method_errno(q->request, r, NULL);
1140         }
1141
1142         dns_query_free(q);
1143 }
1144
1145 static int bus_method_resolve_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1146         _cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL;
1147         const char *name, *type, *domain;
1148         Manager *m = userdata;
1149         int family, ifindex;
1150         uint64_t flags;
1151         DnsQuery *q;
1152         int r;
1153
1154         assert(message);
1155         assert(m);
1156
1157         assert_cc(sizeof(int) == sizeof(int32_t));
1158
1159         r = sd_bus_message_read(message, "isssit", &ifindex, &name, &type, &domain, &family, &flags);
1160         if (r < 0)
1161                 return r;
1162
1163         if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
1164                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
1165
1166         if (isempty(name))
1167                 name = NULL;
1168         else if (!dns_service_name_is_valid(name))
1169                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service name '%s'", name);
1170
1171         if (isempty(type))
1172                 type = NULL;
1173         else if (!dns_srv_type_is_valid(type))
1174                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid SRV service type '%s'", type);
1175
1176         r = dns_name_is_valid(domain);
1177         if (r < 0)
1178                 return r;
1179         if (r == 0)
1180                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid domain '%s'", domain);
1181
1182         if (name && !type)
1183                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Service name cannot be specified without service type.");
1184
1185         r = check_ifindex_flags(ifindex, &flags, SD_RESOLVED_NO_TXT|SD_RESOLVED_NO_ADDRESS, error);
1186         if (r < 0)
1187                 return r;
1188
1189         r = dns_question_new_service(&question_utf8, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), false);
1190         if (r < 0)
1191                 return r;
1192
1193         r = dns_question_new_service(&question_idna, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), true);
1194         if (r < 0)
1195                 return r;
1196
1197         r = dns_query_new(m, &q, question_utf8, question_idna, ifindex, flags|SD_RESOLVED_NO_SEARCH);
1198         if (r < 0)
1199                 return r;
1200
1201         q->request = sd_bus_message_ref(message);
1202         q->request_family = family;
1203         q->complete = bus_method_resolve_service_complete;
1204
1205         r = dns_query_bus_track(q, message);
1206         if (r < 0)
1207                 goto fail;
1208
1209         r = dns_query_go(q);
1210         if (r < 0)
1211                 goto fail;
1212
1213         return 1;
1214
1215 fail:
1216         dns_query_free(q);
1217         return r;
1218 }
1219
1220 int bus_dns_server_append(sd_bus_message *reply, DnsServer *s, bool with_ifindex) {
1221         int r;
1222
1223         assert(reply);
1224
1225         if (!s) {
1226                 if (with_ifindex)
1227                         return sd_bus_message_append(reply, "(iiay)", 0, AF_UNSPEC, 0);
1228                 else
1229                         return sd_bus_message_append(reply, "(iay)", AF_UNSPEC, 0);
1230         }
1231
1232         r = sd_bus_message_open_container(reply, 'r', with_ifindex ? "iiay" : "iay");
1233         if (r < 0)
1234                 return r;
1235
1236         if (with_ifindex) {
1237                 r = sd_bus_message_append(reply, "i", dns_server_ifindex(s));
1238                 if (r < 0)
1239                         return r;
1240         }
1241
1242         r = sd_bus_message_append(reply, "i", s->family);
1243         if (r < 0)
1244                 return r;
1245
1246         r = sd_bus_message_append_array(reply, 'y', &s->address, FAMILY_ADDRESS_SIZE(s->family));
1247         if (r < 0)
1248                 return r;
1249
1250         return sd_bus_message_close_container(reply);
1251 }
1252
1253 static int bus_property_get_dns_servers(
1254                 sd_bus *bus,
1255                 const char *path,
1256                 const char *interface,
1257                 const char *property,
1258                 sd_bus_message *reply,
1259                 void *userdata,
1260                 sd_bus_error *error) {
1261
1262         Manager *m = userdata;
1263         DnsServer *s;
1264         Iterator i;
1265         Link *l;
1266         int r;
1267
1268         assert(reply);
1269         assert(m);
1270
1271         r = sd_bus_message_open_container(reply, 'a', "(iiay)");
1272         if (r < 0)
1273                 return r;
1274
1275         LIST_FOREACH(servers, s, m->dns_servers) {
1276                 r = bus_dns_server_append(reply, s, true);
1277                 if (r < 0)
1278                         return r;
1279         }
1280
1281         HASHMAP_FOREACH(l, m->links, i)
1282                 LIST_FOREACH(servers, s, l->dns_servers) {
1283                         r = bus_dns_server_append(reply, s, true);
1284                         if (r < 0)
1285                                 return r;
1286                 }
1287
1288         return sd_bus_message_close_container(reply);
1289 }
1290
1291 static int bus_property_get_fallback_dns_servers(
1292                 sd_bus *bus,
1293                 const char *path,
1294                 const char *interface,
1295                 const char *property,
1296                 sd_bus_message *reply,
1297                 void *userdata,
1298                 sd_bus_error *error) {
1299
1300         DnsServer *s, **f = userdata;
1301         int r;
1302
1303         assert(reply);
1304         assert(f);
1305
1306         r = sd_bus_message_open_container(reply, 'a', "(iiay)");
1307         if (r < 0)
1308                 return r;
1309
1310         LIST_FOREACH(servers, s, *f) {
1311                 r = bus_dns_server_append(reply, s, true);
1312                 if (r < 0)
1313                         return r;
1314         }
1315
1316         return sd_bus_message_close_container(reply);
1317 }
1318
1319 static int bus_property_get_current_dns_server(
1320                 sd_bus *bus,
1321                 const char *path,
1322                 const char *interface,
1323                 const char *property,
1324                 sd_bus_message *reply,
1325                 void *userdata,
1326                 sd_bus_error *error) {
1327
1328         DnsServer *s;
1329
1330         assert(reply);
1331         assert(userdata);
1332
1333         s = *(DnsServer **) userdata;
1334
1335         return bus_dns_server_append(reply, s, true);
1336 }
1337
1338 static int bus_property_get_domains(
1339                 sd_bus *bus,
1340                 const char *path,
1341                 const char *interface,
1342                 const char *property,
1343                 sd_bus_message *reply,
1344                 void *userdata,
1345                 sd_bus_error *error) {
1346
1347         Manager *m = userdata;
1348         DnsSearchDomain *d;
1349         Iterator i;
1350         Link *l;
1351         int r;
1352
1353         assert(reply);
1354         assert(m);
1355
1356         r = sd_bus_message_open_container(reply, 'a', "(isb)");
1357         if (r < 0)
1358                 return r;
1359
1360         LIST_FOREACH(domains, d, m->search_domains) {
1361                 r = sd_bus_message_append(reply, "(isb)", 0, d->name, d->route_only);
1362                 if (r < 0)
1363                         return r;
1364         }
1365
1366         HASHMAP_FOREACH(l, m->links, i) {
1367                 LIST_FOREACH(domains, d, l->search_domains) {
1368                         r = sd_bus_message_append(reply, "(isb)", l->ifindex, d->name, d->route_only);
1369                         if (r < 0)
1370                                 return r;
1371                 }
1372         }
1373
1374         return sd_bus_message_close_container(reply);
1375 }
1376
1377 static int bus_property_get_transaction_statistics(
1378                 sd_bus *bus,
1379                 const char *path,
1380                 const char *interface,
1381                 const char *property,
1382                 sd_bus_message *reply,
1383                 void *userdata,
1384                 sd_bus_error *error) {
1385
1386         Manager *m = userdata;
1387
1388         assert(reply);
1389         assert(m);
1390
1391         return sd_bus_message_append(reply, "(tt)",
1392                                      (uint64_t) hashmap_size(m->dns_transactions),
1393                                      (uint64_t) m->n_transactions_total);
1394 }
1395
1396 static int bus_property_get_cache_statistics(
1397                 sd_bus *bus,
1398                 const char *path,
1399                 const char *interface,
1400                 const char *property,
1401                 sd_bus_message *reply,
1402                 void *userdata,
1403                 sd_bus_error *error) {
1404
1405         uint64_t size = 0, hit = 0, miss = 0;
1406         Manager *m = userdata;
1407         DnsScope *s;
1408
1409         assert(reply);
1410         assert(m);
1411
1412         LIST_FOREACH(scopes, s, m->dns_scopes) {
1413                 size += dns_cache_size(&s->cache);
1414                 hit += s->cache.n_hit;
1415                 miss += s->cache.n_miss;
1416         }
1417
1418         return sd_bus_message_append(reply, "(ttt)", size, hit, miss);
1419 }
1420
1421 static int bus_property_get_dnssec_statistics(
1422                 sd_bus *bus,
1423                 const char *path,
1424                 const char *interface,
1425                 const char *property,
1426                 sd_bus_message *reply,
1427                 void *userdata,
1428                 sd_bus_error *error) {
1429
1430         Manager *m = userdata;
1431
1432         assert(reply);
1433         assert(m);
1434
1435         return sd_bus_message_append(reply, "(tttt)",
1436                                      (uint64_t) m->n_dnssec_verdict[DNSSEC_SECURE],
1437                                      (uint64_t) m->n_dnssec_verdict[DNSSEC_INSECURE],
1438                                      (uint64_t) m->n_dnssec_verdict[DNSSEC_BOGUS],
1439                                      (uint64_t) m->n_dnssec_verdict[DNSSEC_INDETERMINATE]);
1440 }
1441
1442 static int bus_property_get_ntas(
1443                 sd_bus *bus,
1444                 const char *path,
1445                 const char *interface,
1446                 const char *property,
1447                 sd_bus_message *reply,
1448                 void *userdata,
1449                 sd_bus_error *error) {
1450
1451         Manager *m = userdata;
1452         const char *domain;
1453         Iterator i;
1454         int r;
1455
1456         assert(reply);
1457         assert(m);
1458
1459         r = sd_bus_message_open_container(reply, 'a', "s");
1460         if (r < 0)
1461                 return r;
1462
1463         SET_FOREACH(domain, m->trust_anchor.negative_by_name, i) {
1464                 r = sd_bus_message_append(reply, "s", domain);
1465                 if (r < 0)
1466                         return r;
1467         }
1468
1469         return sd_bus_message_close_container(reply);
1470 }
1471
1472 static BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_dns_stub_listener_mode, dns_stub_listener_mode, DnsStubListenerMode);
1473 static BUS_DEFINE_PROPERTY_GET(bus_property_get_dnssec_supported, "b", Manager, manager_dnssec_supported);
1474 static BUS_DEFINE_PROPERTY_GET2(bus_property_get_dnssec_mode, "s", Manager, manager_get_dnssec_mode, dnssec_mode_to_string);
1475 static BUS_DEFINE_PROPERTY_GET2(bus_property_get_dns_over_tls_mode, "s", Manager, manager_get_dns_over_tls_mode, dns_over_tls_mode_to_string);
1476
1477 static int bus_method_reset_statistics(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1478         Manager *m = userdata;
1479         DnsScope *s;
1480
1481         assert(message);
1482         assert(m);
1483
1484         LIST_FOREACH(scopes, s, m->dns_scopes)
1485                 s->cache.n_hit = s->cache.n_miss = 0;
1486
1487         m->n_transactions_total = 0;
1488         zero(m->n_dnssec_verdict);
1489
1490         return sd_bus_reply_method_return(message, NULL);
1491 }
1492
1493 static int get_any_link(Manager *m, int ifindex, Link **ret, sd_bus_error *error) {
1494         Link *l;
1495
1496         assert(m);
1497         assert(ret);
1498
1499         if (ifindex <= 0)
1500                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
1501
1502         l = hashmap_get(m->links, INT_TO_PTR(ifindex));
1503         if (!l)
1504                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %i not known", ifindex);
1505
1506         *ret = l;
1507         return 0;
1508 }
1509
1510 static int call_link_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
1511         int ifindex, r;
1512         Link *l;
1513
1514         assert(m);
1515         assert(message);
1516         assert(handler);
1517
1518         assert_cc(sizeof(int) == sizeof(int32_t));
1519         r = sd_bus_message_read(message, "i", &ifindex);
1520         if (r < 0)
1521                 return r;
1522
1523         r = get_any_link(m, ifindex, &l, error);
1524         if (r < 0)
1525                 return r;
1526
1527         return handler(message, l, error);
1528 }
1529
1530 static int bus_method_set_link_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1531         return call_link_method(userdata, message, bus_link_method_set_dns_servers, error);
1532 }
1533
1534 static int bus_method_set_link_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1535         return call_link_method(userdata, message, bus_link_method_set_domains, error);
1536 }
1537
1538 static int bus_method_set_link_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1539         return call_link_method(userdata, message, bus_link_method_set_default_route, error);
1540 }
1541
1542 static int bus_method_set_link_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1543         return call_link_method(userdata, message, bus_link_method_set_llmnr, error);
1544 }
1545
1546 static int bus_method_set_link_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1547         return call_link_method(userdata, message, bus_link_method_set_mdns, error);
1548 }
1549
1550 static int bus_method_set_link_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1551         return call_link_method(userdata, message, bus_link_method_set_dns_over_tls, error);
1552 }
1553
1554 static int bus_method_set_link_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1555         return call_link_method(userdata, message, bus_link_method_set_dnssec, error);
1556 }
1557
1558 static int bus_method_set_link_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1559         return call_link_method(userdata, message, bus_link_method_set_dnssec_negative_trust_anchors, error);
1560 }
1561
1562 static int bus_method_revert_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1563         return call_link_method(userdata, message, bus_link_method_revert, error);
1564 }
1565
1566 static int bus_method_get_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1567         _cleanup_free_ char *p = NULL;
1568         Manager *m = userdata;
1569         int r, ifindex;
1570         Link *l;
1571
1572         assert(message);
1573         assert(m);
1574
1575         assert_cc(sizeof(int) == sizeof(int32_t));
1576         r = sd_bus_message_read(message, "i", &ifindex);
1577         if (r < 0)
1578                 return r;
1579
1580         r = get_any_link(m, ifindex, &l, error);
1581         if (r < 0)
1582                 return r;
1583
1584         p = link_bus_path(l);
1585         if (!p)
1586                 return -ENOMEM;
1587
1588         return sd_bus_reply_method_return(message, "o", p);
1589 }
1590
1591 static int bus_method_flush_caches(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1592         Manager *m = userdata;
1593
1594         assert(message);
1595         assert(m);
1596
1597         manager_flush_caches(m);
1598
1599         return sd_bus_reply_method_return(message, NULL);
1600 }
1601
1602 static int bus_method_reset_server_features(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1603         Manager *m = userdata;
1604
1605         assert(message);
1606         assert(m);
1607
1608         manager_reset_server_features(m);
1609
1610         return sd_bus_reply_method_return(message, NULL);
1611 }
1612
1613 static int on_bus_track(sd_bus_track *t, void *userdata) {
1614         DnssdService *s = userdata;
1615
1616         assert(t);
1617         assert(s);
1618
1619         log_debug("Client of active request vanished, destroying DNS-SD service.");
1620         dnssd_service_free(s);
1621
1622         return 0;
1623 }
1624
1625 static int bus_method_register_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1626         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1627         _cleanup_(dnssd_service_freep) DnssdService *service = NULL;
1628         _cleanup_(sd_bus_track_unrefp) sd_bus_track *bus_track = NULL;
1629         _cleanup_free_ char *path = NULL;
1630         _cleanup_free_ char *instance_name = NULL;
1631         Manager *m = userdata;
1632         DnssdService *s = NULL;
1633         const char *name;
1634         const char *name_template;
1635         const char *type;
1636         uid_t euid;
1637         int r;
1638
1639         assert(message);
1640         assert(m);
1641
1642         if (m->mdns_support != RESOLVE_SUPPORT_YES)
1643                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Support for MulticastDNS is disabled");
1644
1645         service = new0(DnssdService, 1);
1646         if (!service)
1647                 return log_oom();
1648
1649         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1650         if (r < 0)
1651                 return r;
1652
1653         r = sd_bus_creds_get_euid(creds, &euid);
1654         if (r < 0)
1655                 return r;
1656         service->originator = euid;
1657
1658         r = sd_bus_message_read(message, "sssqqq", &name, &name_template, &type,
1659                                 &service->port, &service->priority,
1660                                 &service->weight);
1661         if (r < 0)
1662                 return r;
1663
1664         s = hashmap_get(m->dnssd_services, name);
1665         if (s)
1666                 return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", name);
1667
1668         if (!dnssd_srv_type_is_valid(type))
1669                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service type '%s' is invalid", type);
1670
1671         service->name = strdup(name);
1672         if (!service->name)
1673                 return log_oom();
1674
1675         service->name_template = strdup(name_template);
1676         if (!service->name_template)
1677                 return log_oom();
1678
1679         service->type = strdup(type);
1680         if (!service->type)
1681                 return log_oom();
1682
1683         r = dnssd_render_instance_name(service, &instance_name);
1684         if (r < 0)
1685                 return r;
1686
1687         r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "a{say}");
1688         if (r < 0)
1689                 return r;
1690
1691         while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "{say}")) > 0) {
1692                 _cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL;
1693                 DnsTxtItem *last = NULL;
1694
1695                 txt_data = new0(DnssdTxtData, 1);
1696                 if (!txt_data)
1697                         return log_oom();
1698
1699                 while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_DICT_ENTRY, "say")) > 0) {
1700                         const char *key;
1701                         const void *value;
1702                         size_t size;
1703                         DnsTxtItem *i;
1704
1705                         r = sd_bus_message_read(message, "s", &key);
1706                         if (r < 0)
1707                                 return r;
1708
1709                         if (isempty(key))
1710                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Keys in DNS-SD TXT RRs can't be empty");
1711
1712                         if (!ascii_is_valid(key))
1713                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TXT key '%s' contains non-ASCII symbols", key);
1714
1715                         r = sd_bus_message_read_array(message, 'y', &value, &size);
1716                         if (r < 0)
1717                                 return r;
1718
1719                         r = dnssd_txt_item_new_from_data(key, value, size, &i);
1720                         if (r < 0)
1721                                 return r;
1722
1723                         LIST_INSERT_AFTER(items, txt_data->txt, last, i);
1724                         last = i;
1725
1726                         r = sd_bus_message_exit_container(message);
1727                         if (r < 0)
1728                                 return r;
1729
1730                 }
1731                 if (r < 0)
1732                         return r;
1733
1734                 r = sd_bus_message_exit_container(message);
1735                 if (r < 0)
1736                         return r;
1737
1738                 if (txt_data->txt) {
1739                         LIST_PREPEND(items, service->txt_data_items, txt_data);
1740                         txt_data = NULL;
1741                 }
1742         }
1743         if (r < 0)
1744                 return r;
1745
1746         r = sd_bus_message_exit_container(message);
1747         if (r < 0)
1748                 return r;
1749
1750         if (!service->txt_data_items) {
1751                 _cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL;
1752
1753                 txt_data = new0(DnssdTxtData, 1);
1754                 if (!txt_data)
1755                         return log_oom();
1756
1757                 r = dns_txt_item_new_empty(&txt_data->txt);
1758                 if (r < 0)
1759                         return r;
1760
1761                 LIST_PREPEND(items, service->txt_data_items, txt_data);
1762                 txt_data = NULL;
1763         }
1764
1765         r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->name, &path);
1766         if (r < 0)
1767                 return r;
1768
1769         r = bus_verify_polkit_async(message, CAP_SYS_ADMIN,
1770                                     "org.freedesktop.resolve1.register-service",
1771                                     NULL, false, UID_INVALID,
1772                                     &m->polkit_registry, error);
1773         if (r < 0)
1774                 return r;
1775         if (r == 0)
1776                 return 1; /* Polkit will call us back */
1777
1778         r = hashmap_ensure_allocated(&m->dnssd_services, &string_hash_ops);
1779         if (r < 0)
1780                 return r;
1781
1782         r = hashmap_put(m->dnssd_services, service->name, service);
1783         if (r < 0)
1784                 return r;
1785
1786         r = sd_bus_track_new(sd_bus_message_get_bus(message), &bus_track, on_bus_track, service);
1787         if (r < 0)
1788                 return r;
1789
1790         r = sd_bus_track_add_sender(bus_track, message);
1791         if (r < 0)
1792                 return r;
1793
1794         service->manager = m;
1795
1796         service = NULL;
1797
1798         manager_refresh_rrs(m);
1799
1800         return sd_bus_reply_method_return(message, "o", path);
1801 }
1802
1803 static int call_dnssd_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
1804         _cleanup_free_ char *name = NULL;
1805         DnssdService *s = NULL;
1806         const char *path;
1807         int r;
1808
1809         assert(m);
1810         assert(message);
1811         assert(handler);
1812
1813         r = sd_bus_message_read(message, "o", &path);
1814         if (r < 0)
1815                 return r;
1816
1817         r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name);
1818         if (r == 0)
1819                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service with object path '%s' does not exist", path);
1820         if (r < 0)
1821                 return r;
1822
1823         s = hashmap_get(m->dnssd_services, name);
1824         if (!s)
1825                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service '%s' not known", name);
1826
1827         return handler(message, s, error);
1828 }
1829
1830 static int bus_method_unregister_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1831         Manager *m = userdata;
1832
1833         assert(message);
1834         assert(m);
1835
1836         return call_dnssd_method(m, message, bus_dnssd_method_unregister, error);
1837 }
1838
1839 static int property_get_log_level(
1840                 sd_bus *bus,
1841                 const char *path,
1842                 const char *interface,
1843                 const char *property,
1844                 sd_bus_message *reply,
1845                 void *userdata,
1846                 sd_bus_error *error) {
1847
1848         _cleanup_free_ char *t = NULL;
1849         int r;
1850
1851         assert(bus);
1852         assert(reply);
1853
1854         r = log_level_to_string_alloc(log_get_max_level(), &t);
1855         if (r < 0)
1856                 return r;
1857
1858         return sd_bus_message_append(reply, "s", t);
1859 }
1860
1861 static int property_set_log_level(
1862                 sd_bus *bus,
1863                 const char *path,
1864                 const char *interface,
1865                 const char *property,
1866                 sd_bus_message *value,
1867                 void *userdata,
1868                 sd_bus_error *error) {
1869
1870         const char *t;
1871         int r;
1872
1873         assert(bus);
1874         assert(value);
1875
1876         r = sd_bus_message_read(value, "s", &t);
1877         if (r < 0)
1878                 return r;
1879
1880         r = log_level_from_string(t);
1881         if (r < 0)
1882                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid log level '%s'", t);
1883
1884         log_info("Setting log level to %s.", t);
1885         log_set_max_level(r);
1886
1887         return 0;
1888 }
1889
1890 static const sd_bus_vtable resolve_vtable[] = {
1891         SD_BUS_VTABLE_START(0),
1892         SD_BUS_PROPERTY("LLMNRHostname", "s", NULL, offsetof(Manager, llmnr_hostname), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1893         SD_BUS_PROPERTY("LLMNR", "s", bus_property_get_resolve_support, offsetof(Manager, llmnr_support), 0),
1894         SD_BUS_PROPERTY("MulticastDNS", "s", bus_property_get_resolve_support, offsetof(Manager, mdns_support), 0),
1895         SD_BUS_PROPERTY("DNSOverTLS", "s", bus_property_get_dns_over_tls_mode, 0, 0),
1896         SD_BUS_PROPERTY("DNS", "a(iiay)", bus_property_get_dns_servers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1897         SD_BUS_PROPERTY("FallbackDNS", "a(iiay)", bus_property_get_fallback_dns_servers, offsetof(Manager, fallback_dns_servers), SD_BUS_VTABLE_PROPERTY_CONST),
1898         SD_BUS_PROPERTY("CurrentDNSServer", "(iiay)", bus_property_get_current_dns_server, offsetof(Manager, current_dns_server), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1899         SD_BUS_PROPERTY("Domains", "a(isb)", bus_property_get_domains, 0, 0),
1900         SD_BUS_PROPERTY("TransactionStatistics", "(tt)", bus_property_get_transaction_statistics, 0, 0),
1901         SD_BUS_PROPERTY("CacheStatistics", "(ttt)", bus_property_get_cache_statistics, 0, 0),
1902         SD_BUS_PROPERTY("DNSSEC", "s", bus_property_get_dnssec_mode, 0, 0),
1903         SD_BUS_PROPERTY("DNSSECStatistics", "(tttt)", bus_property_get_dnssec_statistics, 0, 0),
1904         SD_BUS_PROPERTY("DNSSECSupported", "b", bus_property_get_dnssec_supported, 0, 0),
1905         SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", bus_property_get_ntas, 0, 0),
1906         SD_BUS_PROPERTY("DNSStubListener", "s", bus_property_get_dns_stub_listener_mode, offsetof(Manager, dns_stub_listener_mode), 0),
1907
1908         SD_BUS_WRITABLE_PROPERTY("LogLevel", "s", property_get_log_level, property_set_log_level, 0, 0),
1909
1910         SD_BUS_METHOD_WITH_NAMES("ResolveHostname",
1911                                  "isit",
1912                                  SD_BUS_PARAM(ifindex)
1913                                  SD_BUS_PARAM(name)
1914                                  SD_BUS_PARAM(family)
1915                                  SD_BUS_PARAM(flags),
1916                                  "a(iiay)st",
1917                                  SD_BUS_PARAM(addresses)
1918                                  SD_BUS_PARAM(canonical)
1919                                  SD_BUS_PARAM(flags),
1920                                  bus_method_resolve_hostname,
1921                                  SD_BUS_VTABLE_UNPRIVILEGED),
1922         SD_BUS_METHOD_WITH_NAMES("ResolveAddress",
1923                                  "iiayt",
1924                                  SD_BUS_PARAM(ifindex)
1925                                  SD_BUS_PARAM(family)
1926                                  SD_BUS_PARAM(address)
1927                                  SD_BUS_PARAM(flags),
1928                                  "a(is)t",
1929                                  SD_BUS_PARAM(names)
1930                                  SD_BUS_PARAM(flags),
1931                                  bus_method_resolve_address,
1932                                  SD_BUS_VTABLE_UNPRIVILEGED),
1933         SD_BUS_METHOD_WITH_NAMES("ResolveRecord",
1934                                  "isqqt",
1935                                  SD_BUS_PARAM(ifindex)
1936                                  SD_BUS_PARAM(name)
1937                                  SD_BUS_PARAM(class)
1938                                  SD_BUS_PARAM(type)
1939                                  SD_BUS_PARAM(flags),
1940                                  "a(iqqay)t",
1941                                  SD_BUS_PARAM(records)
1942                                  SD_BUS_PARAM(flags),
1943                                  bus_method_resolve_record,
1944                                  SD_BUS_VTABLE_UNPRIVILEGED),
1945         SD_BUS_METHOD_WITH_NAMES("ResolveService",
1946                                  "isssit",
1947                                  SD_BUS_PARAM(ifindex)
1948                                  SD_BUS_PARAM(name)
1949                                  SD_BUS_PARAM(type)
1950                                  SD_BUS_PARAM(domain)
1951                                  SD_BUS_PARAM(family)
1952                                  SD_BUS_PARAM(flags),
1953                                  "a(qqqsa(iiay)s)aayssst",
1954                                  SD_BUS_PARAM(srv_data)
1955                                  SD_BUS_PARAM(txt_data)
1956                                  SD_BUS_PARAM(canonical_name)
1957                                  SD_BUS_PARAM(canonical_type)
1958                                  SD_BUS_PARAM(canonical_domain)
1959                                  SD_BUS_PARAM(flags),
1960                                  bus_method_resolve_service,
1961                                  SD_BUS_VTABLE_UNPRIVILEGED),
1962         SD_BUS_METHOD_WITH_NAMES("GetLink",
1963                                  "i",
1964                                  SD_BUS_PARAM(ifindex),
1965                                  "o",
1966                                  SD_BUS_PARAM(path),
1967                                  bus_method_get_link,
1968                                  SD_BUS_VTABLE_UNPRIVILEGED),
1969         SD_BUS_METHOD_WITH_NAMES("SetLinkDNS",
1970                                  "ia(iay)",
1971                                  SD_BUS_PARAM(ifindex)
1972                                  SD_BUS_PARAM(addresses),
1973                                  NULL,,
1974                                  bus_method_set_link_dns_servers,
1975                                  SD_BUS_VTABLE_UNPRIVILEGED),
1976         SD_BUS_METHOD_WITH_NAMES("SetLinkDomains",
1977                                  "ia(sb)",
1978                                  SD_BUS_PARAM(ifindex)
1979                                  SD_BUS_PARAM(domains),
1980                                  NULL,,
1981                                  bus_method_set_link_domains,
1982                                  SD_BUS_VTABLE_UNPRIVILEGED),
1983         SD_BUS_METHOD_WITH_NAMES("SetLinkDefaultRoute",
1984                                  "ib",
1985                                  SD_BUS_PARAM(ifindex)
1986                                  SD_BUS_PARAM(enable),
1987                                  NULL,,
1988                                  bus_method_set_link_default_route,
1989                                  SD_BUS_VTABLE_UNPRIVILEGED),
1990         SD_BUS_METHOD_WITH_NAMES("SetLinkLLMNR",
1991                                  "is",
1992                                  SD_BUS_PARAM(ifindex)
1993                                  SD_BUS_PARAM(mode),
1994                                  NULL,,
1995                                  bus_method_set_link_llmnr,
1996                                  SD_BUS_VTABLE_UNPRIVILEGED),
1997         SD_BUS_METHOD_WITH_NAMES("SetLinkMulticastDNS",
1998                                  "is",
1999                                  SD_BUS_PARAM(ifindex)
2000                                  SD_BUS_PARAM(mode),
2001                                  NULL,,
2002                                  bus_method_set_link_mdns,
2003                                  SD_BUS_VTABLE_UNPRIVILEGED),
2004         SD_BUS_METHOD_WITH_NAMES("SetLinkDNSOverTLS",
2005                                  "is",
2006                                  SD_BUS_PARAM(ifindex)
2007                                  SD_BUS_PARAM(mode),
2008                                  NULL,,
2009                                  bus_method_set_link_dns_over_tls,
2010                                  SD_BUS_VTABLE_UNPRIVILEGED),
2011         SD_BUS_METHOD_WITH_NAMES("SetLinkDNSSEC",
2012                                  "is",
2013                                  SD_BUS_PARAM(ifindex)
2014                                  SD_BUS_PARAM(mode),
2015                                  NULL,,
2016                                  bus_method_set_link_dnssec,
2017                                  SD_BUS_VTABLE_UNPRIVILEGED),
2018         SD_BUS_METHOD_WITH_NAMES("SetLinkDNSSECNegativeTrustAnchors",
2019                                  "ias",
2020                                  SD_BUS_PARAM(ifindex)
2021                                  SD_BUS_PARAM(names),
2022                                  NULL,,
2023                                  bus_method_set_link_dnssec_negative_trust_anchors,
2024                                  SD_BUS_VTABLE_UNPRIVILEGED),
2025         SD_BUS_METHOD_WITH_NAMES("RevertLink",
2026                                  "i",
2027                                  SD_BUS_PARAM(ifindex),
2028                                  NULL,,
2029                                  bus_method_revert_link,
2030                                  SD_BUS_VTABLE_UNPRIVILEGED),
2031         SD_BUS_METHOD_WITH_NAMES("RegisterService",
2032                                  "sssqqqaa{say}",
2033                                  SD_BUS_PARAM(name)
2034                                  SD_BUS_PARAM(name_template)
2035                                  SD_BUS_PARAM(type)
2036                                  SD_BUS_PARAM(service_port)
2037                                  SD_BUS_PARAM(service_priority)
2038                                  SD_BUS_PARAM(serwise_weight)
2039                                  SD_BUS_PARAM(txt_datas),
2040                                  "o",
2041                                  SD_BUS_PARAM(service_path),
2042                                  bus_method_register_service,
2043                                  SD_BUS_VTABLE_UNPRIVILEGED),
2044         SD_BUS_METHOD_WITH_NAMES("UnregisterService",
2045                                  "o",
2046                                  SD_BUS_PARAM(service_path),
2047                                  NULL,,
2048                                  bus_method_unregister_service,
2049                                  SD_BUS_VTABLE_UNPRIVILEGED),
2050
2051         SD_BUS_METHOD("ResetStatistics",
2052                       NULL,
2053                       NULL,
2054                       bus_method_reset_statistics,
2055                       SD_BUS_VTABLE_UNPRIVILEGED),
2056         SD_BUS_METHOD("FlushCaches",
2057                       NULL,
2058                       NULL,
2059                       bus_method_flush_caches,
2060                       SD_BUS_VTABLE_UNPRIVILEGED),
2061         SD_BUS_METHOD("ResetServerFeatures",
2062                       NULL,
2063                       NULL,
2064                       bus_method_reset_server_features,
2065                       SD_BUS_VTABLE_UNPRIVILEGED),
2066
2067         SD_BUS_VTABLE_END,
2068 };
2069
2070 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
2071         Manager *m = userdata;
2072         int b, r;
2073
2074         assert(message);
2075         assert(m);
2076
2077         r = sd_bus_message_read(message, "b", &b);
2078         if (r < 0) {
2079                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
2080                 return 0;
2081         }
2082
2083         if (b)
2084                 return 0;
2085
2086         log_debug("Coming back from suspend, verifying all RRs...");
2087
2088         manager_verify_all(m);
2089         return 0;
2090 }
2091
2092 int manager_connect_bus(Manager *m) {
2093         int r;
2094
2095         assert(m);
2096
2097         if (m->bus)
2098                 return 0;
2099
2100         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-resolve");
2101         if (r < 0)
2102                 return log_error_errno(r, "Failed to connect to system bus: %m");
2103
2104         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1.Manager", resolve_vtable, m);
2105         if (r < 0)
2106                 return log_error_errno(r, "Failed to register object: %m");
2107
2108         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/resolve1/link", "org.freedesktop.resolve1.Link", link_vtable, link_object_find, m);
2109         if (r < 0)
2110                 return log_error_errno(r, "Failed to register link objects: %m");
2111
2112         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/resolve1/link", link_node_enumerator, m);
2113         if (r < 0)
2114                 return log_error_errno(r, "Failed to register link enumerator: %m");
2115
2116         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", "org.freedesktop.resolve1.DnssdService", dnssd_vtable, dnssd_object_find, m);
2117         if (r < 0)
2118                 return log_error_errno(r, "Failed to register dnssd objects: %m");
2119
2120         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", dnssd_node_enumerator, m);
2121         if (r < 0)
2122                 return log_error_errno(r, "Failed to register dnssd enumerator: %m");
2123
2124         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.resolve1", 0, NULL, NULL);
2125         if (r < 0)
2126                 return log_error_errno(r, "Failed to request name: %m");
2127
2128         r = sd_bus_attach_event(m->bus, m->event, 0);
2129         if (r < 0)
2130                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
2131
2132         r = sd_bus_match_signal_async(
2133                         m->bus,
2134                         NULL,
2135                         "org.freedesktop.login1",
2136                         "/org/freedesktop/login1",
2137                         "org.freedesktop.login1.Manager",
2138                         "PrepareForSleep",
2139                         match_prepare_for_sleep,
2140                         NULL,
2141                         m);
2142         if (r < 0)
2143                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
2144
2145         return 0;
2146 }
2147
2148 int _manager_send_changed(Manager *manager, const char *property, ...) {
2149         assert(manager);
2150
2151         char **l = strv_from_stdarg_alloca(property);
2152
2153         int r = sd_bus_emit_properties_changed_strv(
2154                         manager->bus,
2155                         "/org/freedesktop/resolve1",
2156                         "org.freedesktop.resolve1.Manager",
2157                         l);
2158         if (r < 0)
2159                 log_notice_errno(r, "Failed to emit notification about changed property %s: %m", property);
2160         return r;
2161 }