src/resolve/resolved-varlink.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "glyph-util.h"
   4 #include "in-addr-util.h"
   5 #include "resolved-dns-synthesize.h"
   6 #include "resolved-varlink.h"
   7 #include "socket-netlink.h"
   8
   9 typedef struct LookupParameters {
  10         int ifindex;
  11         uint64_t flags;
  12         int family;
  13         union in_addr_union address;
  14         size_t address_size;
  15         char *name;
  16 } LookupParameters;
  17
  18 static void lookup_parameters_destroy(LookupParameters *p) {
  19         assert(p);
  20         free(p->name);
  21 }
  22
  23 static int reply_query_state(DnsQuery *q) {
  24
  25         assert(q);
  26         assert(q->varlink_request);
  27
  28         switch (q->state) {
  29
  30         case DNS_TRANSACTION_NO_SERVERS:
  31                 return varlink_error(q->varlink_request, "io.systemd.Resolve.NoNameServers", NULL);
  32
  33         case DNS_TRANSACTION_TIMEOUT:
  34                 return varlink_error(q->varlink_request, "io.systemd.Resolve.QueryTimedOut", NULL);
  35
  36         case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED:
  37                 return varlink_error(q->varlink_request, "io.systemd.Resolve.MaxAttemptsReached", NULL);
  38
  39         case DNS_TRANSACTION_INVALID_REPLY:
  40                 return varlink_error(q->varlink_request, "io.systemd.Resolve.InvalidReply", NULL);
  41
  42         case DNS_TRANSACTION_ERRNO:
  43                 return varlink_error_errno(q->varlink_request, q->answer_errno);
  44
  45         case DNS_TRANSACTION_ABORTED:
  46                 return varlink_error(q->varlink_request, "io.systemd.Resolve.QueryAborted", NULL);
  47
  48         case DNS_TRANSACTION_DNSSEC_FAILED:
  49                 return varlink_errorb(q->varlink_request, "io.systemd.Resolve.DNSSECValidationFailed",
  50                                       JSON_BUILD_OBJECT(JSON_BUILD_PAIR("result", JSON_BUILD_STRING(dnssec_result_to_string(q->answer_dnssec_result)))));
  51
  52         case DNS_TRANSACTION_NO_TRUST_ANCHOR:
  53                 return varlink_error(q->varlink_request, "io.systemd.Resolve.NoTrustAnchor", NULL);
  54
  55         case DNS_TRANSACTION_RR_TYPE_UNSUPPORTED:
  56                 return varlink_error(q->varlink_request, "io.systemd.Resolve.ResourceRecordTypeUnsupported", NULL);
  57
  58         case DNS_TRANSACTION_NETWORK_DOWN:
  59                 return varlink_error(q->varlink_request, "io.systemd.Resolve.NetworkDown", NULL);
  60
  61         case DNS_TRANSACTION_NO_SOURCE:
  62                 return varlink_error(q->varlink_request, "io.systemd.Resolve.NoSource", NULL);
  63
  64         case DNS_TRANSACTION_STUB_LOOP:
  65                 return varlink_error(q->varlink_request, "io.systemd.Resolve.StubLoop", NULL);
  66
  67         case DNS_TRANSACTION_NOT_FOUND:
  68                 /* We return this as NXDOMAIN. This is only generated when a host doesn't implement LLMNR/TCP, and we
  69                  * thus quickly know that we cannot resolve an in-addr.arpa or ip6.arpa address. */
  70                 return varlink_errorb(q->varlink_request, "io.systemd.Resolve.DNSError",
  71                                       JSON_BUILD_OBJECT(JSON_BUILD_PAIR("rcode", JSON_BUILD_INTEGER(DNS_RCODE_NXDOMAIN))));
  72
  73         case DNS_TRANSACTION_RCODE_FAILURE:
  74                 return varlink_errorb(q->varlink_request, "io.systemd.Resolve.DNSError",
  75                                       JSON_BUILD_OBJECT(JSON_BUILD_PAIR("rcode", JSON_BUILD_INTEGER(q->answer_rcode))));
  76
  77         case DNS_TRANSACTION_NULL:
  78         case DNS_TRANSACTION_PENDING:
  79         case DNS_TRANSACTION_VALIDATING:
  80         case DNS_TRANSACTION_SUCCESS:
  81         default:
  82                 assert_not_reached();
  83         }
  84 }
  85
  86 static void vl_on_disconnect(VarlinkServer *s, Varlink *link, void *userdata) {
  87         DnsQuery *q;
  88
  89         assert(s);
  90         assert(link);
  91
  92         q = varlink_get_userdata(link);
  93         if (!q)
  94                 return;
  95
  96         if (!DNS_TRANSACTION_IS_LIVE(q->state))
  97                 return;
  98
  99         log_debug("Client of active query vanished, aborting query.");
 100         dns_query_complete(q, DNS_TRANSACTION_ABORTED);
 101 }
 102
 103 static bool validate_and_mangle_flags(
 104                 const char *name,
 105                 uint64_t *flags,
 106                 uint64_t ok) {
 107
 108         assert(flags);
 109
 110         /* This checks that the specified client-provided flags parameter actually makes sense, and mangles
 111          * it slightly. Specifically:
 112          *
 113          * 1. We check that only the protocol flags and a bunch of NO_XYZ flags are on at most, plus the
 114          *    method-specific flags specified in 'ok'.
 115          *
 116          * 2. If no protocols are enabled we automatically convert that to "all protocols are enabled".
 117          *
 118          * The second rule means that clients can just pass 0 as flags for the common case, and all supported
 119          * protocols are enabled. Moreover it's useful so that client's do not have to be aware of all
 120          * protocols implemented in resolved, but can use 0 as protocols flags set as indicator for
 121          * "everything".
 122          */
 123
 124         if (*flags & ~(SD_RESOLVED_PROTOCOLS_ALL|
 125                        SD_RESOLVED_NO_CNAME|
 126                        SD_RESOLVED_NO_VALIDATE|
 127                        SD_RESOLVED_NO_SYNTHESIZE|
 128                        SD_RESOLVED_NO_CACHE|
 129                        SD_RESOLVED_NO_ZONE|
 130                        SD_RESOLVED_NO_TRUST_ANCHOR|
 131                        SD_RESOLVED_NO_NETWORK|
 132                        ok))
 133                 return false;
 134
 135         if ((*flags & SD_RESOLVED_PROTOCOLS_ALL) == 0) /* If no protocol is enabled, enable all */
 136                 *flags |= SD_RESOLVED_PROTOCOLS_ALL;
 137
 138         /* If the SD_RESOLVED_NO_SEARCH flag is acceptable, and the query name is dot-suffixed, turn off
 139          * search domains. Note that DNS name normalization drops the dot suffix, hence we propagate this
 140          * into the flags field as early as we can. */
 141         if (name && FLAGS_SET(ok, SD_RESOLVED_NO_SEARCH) && dns_name_dot_suffixed(name) > 0)
 142                 *flags |= SD_RESOLVED_NO_SEARCH;
 143
 144         return true;
 145 }
 146
 147 static void vl_method_resolve_hostname_complete(DnsQuery *query) {
 148         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
 149         _cleanup_(json_variant_unrefp) JsonVariant *array = NULL;
 150         _cleanup_(dns_query_freep) DnsQuery *q = query;
 151         _cleanup_free_ char *normalized = NULL;
 152         DnsResourceRecord *rr;
 153         DnsQuestion *question;
 154         int ifindex, r;
 155
 156         assert(q);
 157
 158         if (q->state != DNS_TRANSACTION_SUCCESS) {
 159                 r = reply_query_state(q);
 160                 goto finish;
 161         }
 162
 163         r = dns_query_process_cname_many(q);
 164         if (r == -ELOOP) {
 165                 r = varlink_error(q->varlink_request, "io.systemd.Resolve.CNAMELoop", NULL);
 166                 goto finish;
 167         }
 168         if (r < 0)
 169                 goto finish;
 170         if (r == DNS_QUERY_CNAME) {
 171                 /* This was a cname, and the query was restarted. */
 172                 TAKE_PTR(q);
 173                 return;
 174         }
 175
 176         question = dns_query_question_for_protocol(q, q->answer_protocol);
 177
 178         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
 179                 _cleanup_(json_variant_unrefp) JsonVariant *entry = NULL;
 180                 int family;
 181                 const void *p;
 182
 183                 r = dns_question_matches_rr(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain));
 184                 if (r < 0)
 185                         goto finish;
 186                 if (r == 0)
 187                         continue;
 188
 189                 if (rr->key->type == DNS_TYPE_A) {
 190                         family = AF_INET;
 191                         p = &rr->a.in_addr;
 192                 } else if (rr->key->type == DNS_TYPE_AAAA) {
 193                         family = AF_INET6;
 194                         p = &rr->aaaa.in6_addr;
 195                 } else {
 196                         r = -EAFNOSUPPORT;
 197                         goto finish;
 198                 }
 199
 200                 r = json_build(&entry,
 201                                JSON_BUILD_OBJECT(
 202                                                JSON_BUILD_PAIR_CONDITION(ifindex > 0, "ifindex", JSON_BUILD_INTEGER(ifindex)),
 203                                                JSON_BUILD_PAIR("family", JSON_BUILD_INTEGER(family)),
 204                                                JSON_BUILD_PAIR("address", JSON_BUILD_BYTE_ARRAY(p, FAMILY_ADDRESS_SIZE(family)))));
 205                 if (r < 0)
 206                         goto finish;
 207
 208                 if (!canonical)
 209                         canonical = dns_resource_record_ref(rr);
 210
 211                 r = json_variant_append_array(&array, entry);
 212                 if (r < 0)
 213                         goto finish;
 214         }
 215
 216         if (json_variant_is_blank_object(array)) {
 217                 r = varlink_error(q->varlink_request, "io.systemd.Resolve.NoSuchResourceRecord", NULL);
 218                 goto finish;
 219         }
 220
 221         assert(canonical);
 222         r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized);
 223         if (r < 0)
 224                 goto finish;
 225
 226         r = varlink_replyb(q->varlink_request,
 227                            JSON_BUILD_OBJECT(
 228                                            JSON_BUILD_PAIR("addresses", JSON_BUILD_VARIANT(array)),
 229                                            JSON_BUILD_PAIR("name", JSON_BUILD_STRING(normalized)),
 230                                            JSON_BUILD_PAIR("flags", JSON_BUILD_INTEGER(dns_query_reply_flags_make(q)))));
 231 finish:
 232         if (r < 0) {
 233                 log_error_errno(r, "Failed to send hostname reply: %m");
 234                 r = varlink_error_errno(q->varlink_request, r);
 235         }
 236 }
 237
 238 static int parse_as_address(Varlink *link, LookupParameters *p) {
 239         _cleanup_free_ char *canonical = NULL;
 240         int r, ff, parsed_ifindex, ifindex;
 241         union in_addr_union parsed;
 242
 243         assert(link);
 244         assert(p);
 245
 246         /* Check if this parses as literal address. If so, just parse it and return that, do not involve networking */
 247         r = in_addr_ifindex_from_string_auto(p->name, &ff, &parsed, &parsed_ifindex);
 248         if (r < 0)
 249                 return 0; /* not a literal address */
 250
 251         /* Make sure the data we parsed matches what is requested */
 252         if ((p->family != AF_UNSPEC && ff != p->family) ||
 253             (p->ifindex > 0 && parsed_ifindex > 0 && parsed_ifindex != p->ifindex))
 254                 return varlink_error(link, "io.systemd.Resolve.NoSuchResourceRecord", NULL);
 255
 256         ifindex = parsed_ifindex > 0 ? parsed_ifindex : p->ifindex;
 257
 258         /* Reformat the address as string, to return as canonicalized name */
 259         r = in_addr_ifindex_to_string(ff, &parsed, ifindex, &canonical);
 260         if (r < 0)
 261                 return r;
 262
 263         return varlink_replyb(
 264                         link,
 265                         JSON_BUILD_OBJECT(
 266                                 JSON_BUILD_PAIR("addresses",
 267                                         JSON_BUILD_ARRAY(
 268                                                 JSON_BUILD_OBJECT(
 269                                                         JSON_BUILD_PAIR_CONDITION(ifindex > 0, "ifindex", JSON_BUILD_INTEGER(ifindex)),
 270                                                         JSON_BUILD_PAIR("family", JSON_BUILD_INTEGER(ff)),
 271                                                         JSON_BUILD_PAIR("address", JSON_BUILD_BYTE_ARRAY(&parsed, FAMILY_ADDRESS_SIZE(ff)))))),
 272                                 JSON_BUILD_PAIR("name", JSON_BUILD_STRING(canonical)),
 273                                 JSON_BUILD_PAIR("flags", JSON_BUILD_INTEGER(SD_RESOLVED_FLAGS_MAKE(dns_synthesize_protocol(p->flags), ff, true, true)|
 274                                                                             SD_RESOLVED_SYNTHETIC))));
 275 }
 276
 277 static int vl_method_resolve_hostname(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
 278         static const JsonDispatch dispatch_table[] = {
 279                 { "ifindex", JSON_VARIANT_UNSIGNED, json_dispatch_int,    offsetof(LookupParameters, ifindex), 0              },
 280                 { "name",    JSON_VARIANT_STRING,   json_dispatch_string, offsetof(LookupParameters, name),    JSON_MANDATORY },
 281                 { "family",  JSON_VARIANT_UNSIGNED, json_dispatch_int,    offsetof(LookupParameters, family),  0              },
 282                 { "flags",   JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(LookupParameters, flags),   0              },
 283                 {}
 284         };
 285
 286         _cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL;
 287         _cleanup_(lookup_parameters_destroy) LookupParameters p = {
 288                 .family = AF_UNSPEC,
 289         };
 290         _cleanup_(dns_query_freep) DnsQuery *q = NULL;
 291         Manager *m;
 292         int r;
 293
 294         assert(link);
 295
 296         m = varlink_server_get_userdata(varlink_get_server(link));
 297         assert(m);
 298
 299         if (FLAGS_SET(flags, VARLINK_METHOD_ONEWAY))
 300                 return -EINVAL;
 301
 302         r = json_dispatch(parameters, dispatch_table, NULL, 0, &p);
 303         if (r < 0)
 304                 return r;
 305
 306         if (p.ifindex < 0)
 307                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("ifindex"));
 308
 309         r = dns_name_is_valid(p.name);
 310         if (r < 0)
 311                 return r;
 312         if (r == 0)
 313                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("name"));
 314
 315         if (!IN_SET(p.family, AF_UNSPEC, AF_INET, AF_INET6))
 316                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("family"));
 317
 318         if (!validate_and_mangle_flags(p.name, &p.flags, SD_RESOLVED_NO_SEARCH))
 319                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("flags"));
 320
 321         r = parse_as_address(link, &p);
 322         if (r != 0)
 323                 return r;
 324
 325         r = dns_question_new_address(&question_utf8, p.family, p.name, false);
 326         if (r < 0)
 327                 return r;
 328
 329         r = dns_question_new_address(&question_idna, p.family, p.name, true);
 330         if (r < 0 && r != -EALREADY)
 331                 return r;
 332
 333         r = dns_query_new(m, &q, question_utf8, question_idna ?: question_utf8, NULL, p.ifindex, p.flags);
 334         if (r < 0)
 335                 return r;
 336
 337         q->varlink_request = varlink_ref(link);
 338         varlink_set_userdata(link, q);
 339         q->request_family = p.family;
 340         q->complete = vl_method_resolve_hostname_complete;
 341
 342         r = dns_query_go(q);
 343         if (r < 0)
 344                 return r;
 345
 346         TAKE_PTR(q);
 347         return 1;
 348 }
 349
 350 static int json_dispatch_address(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
 351         LookupParameters *p = userdata;
 352         union in_addr_union buf = {};
 353         JsonVariant *i;
 354         size_t n, k = 0;
 355
 356         assert(variant);
 357         assert(p);
 358
 359         if (!json_variant_is_array(variant))
 360                 return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array.", strna(name));
 361
 362         n = json_variant_elements(variant);
 363         if (!IN_SET(n, 4, 16))
 364                 return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is array of unexpected size.", strna(name));
 365
 366         JSON_VARIANT_ARRAY_FOREACH(i, variant) {
 367                 int64_t b;
 368
 369                 if (!json_variant_is_integer(i))
 370                         return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Element %zu of JSON field '%s' is not an integer.", k, strna(name));
 371
 372                 b = json_variant_integer(i);
 373                 if (b < 0 || b > 0xff)
 374                         return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL),
 375                                         "Element %zu of JSON field '%s' is out of range 0%s255.",
 376                                         k, strna(name), special_glyph(SPECIAL_GLYPH_ELLIPSIS));
 377
 378                 buf.bytes[k++] = (uint8_t) b;
 379         }
 380
 381         p->address = buf;
 382         p->address_size = k;
 383
 384         return 0;
 385 }
 386
 387 static void vl_method_resolve_address_complete(DnsQuery *query) {
 388         _cleanup_(json_variant_unrefp) JsonVariant *array = NULL;
 389         _cleanup_(dns_query_freep) DnsQuery *q = query;
 390         DnsQuestion *question;
 391         DnsResourceRecord *rr;
 392         int ifindex, r;
 393
 394         assert(q);
 395
 396         if (q->state != DNS_TRANSACTION_SUCCESS) {
 397                 r = reply_query_state(q);
 398                 goto finish;
 399         }
 400
 401         r = dns_query_process_cname_many(q);
 402         if (r == -ELOOP) {
 403                 r = varlink_error(q->varlink_request, "io.systemd.Resolve.CNAMELoop", NULL);
 404                 goto finish;
 405         }
 406         if (r < 0)
 407                 goto finish;
 408         if (r == DNS_QUERY_CNAME) {
 409                 /* This was a cname, and the query was restarted. */
 410                 TAKE_PTR(q);
 411                 return;
 412         }
 413
 414         question = dns_query_question_for_protocol(q, q->answer_protocol);
 415
 416         DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
 417                 _cleanup_(json_variant_unrefp) JsonVariant *entry = NULL;
 418                 _cleanup_free_ char *normalized = NULL;
 419
 420                 r = dns_question_matches_rr(question, rr, NULL);
 421                 if (r < 0)
 422                         goto finish;
 423                 if (r == 0)
 424                         continue;
 425
 426                 r = dns_name_normalize(rr->ptr.name, 0, &normalized);
 427                 if (r < 0)
 428                         goto finish;
 429
 430                 r = json_build(&entry,
 431                                JSON_BUILD_OBJECT(
 432                                                JSON_BUILD_PAIR_CONDITION(ifindex > 0, "ifindex", JSON_BUILD_INTEGER(ifindex)),
 433                                                JSON_BUILD_PAIR("name", JSON_BUILD_STRING(normalized))));
 434                 if (r < 0)
 435                         goto finish;
 436
 437                 r = json_variant_append_array(&array, entry);
 438                 if (r < 0)
 439                         goto finish;
 440         }
 441
 442         if (json_variant_is_blank_object(array)) {
 443                 r = varlink_error(q->varlink_request, "io.systemd.Resolve.NoSuchResourceRecord", NULL);
 444                 goto finish;
 445         }
 446
 447         r = varlink_replyb(q->varlink_request,
 448                            JSON_BUILD_OBJECT(
 449                                            JSON_BUILD_PAIR("names", JSON_BUILD_VARIANT(array)),
 450                                            JSON_BUILD_PAIR("flags", JSON_BUILD_INTEGER(dns_query_reply_flags_make(q)))));
 451 finish:
 452         if (r < 0) {
 453                 log_error_errno(r, "Failed to send address reply: %m");
 454                 r = varlink_error_errno(q->varlink_request, r);
 455         }
 456 }
 457
 458 static int vl_method_resolve_address(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
 459         static const JsonDispatch dispatch_table[] = {
 460                 { "ifindex", JSON_VARIANT_UNSIGNED, json_dispatch_int,     offsetof(LookupParameters, ifindex), 0              },
 461                 { "family",  JSON_VARIANT_UNSIGNED, json_dispatch_int,     offsetof(LookupParameters, family),  JSON_MANDATORY },
 462                 { "address", JSON_VARIANT_ARRAY,    json_dispatch_address, 0,                                   JSON_MANDATORY },
 463                 { "flags",   JSON_VARIANT_UNSIGNED, json_dispatch_uint64,  offsetof(LookupParameters, flags),   0              },
 464                 {}
 465         };
 466
 467         _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
 468         _cleanup_(lookup_parameters_destroy) LookupParameters p = {
 469                 .family = AF_UNSPEC,
 470         };
 471         _cleanup_(dns_query_freep) DnsQuery *q = NULL;
 472         Manager *m;
 473         int r;
 474
 475         assert(link);
 476
 477         m = varlink_server_get_userdata(varlink_get_server(link));
 478         assert(m);
 479
 480         if (FLAGS_SET(flags, VARLINK_METHOD_ONEWAY))
 481                 return -EINVAL;
 482
 483         r = json_dispatch(parameters, dispatch_table, NULL, 0, &p);
 484         if (r < 0)
 485                 return r;
 486
 487         if (p.ifindex < 0)
 488                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("ifindex"));
 489
 490         if (!IN_SET(p.family, AF_INET, AF_INET6))
 491                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("family"));
 492
 493         if (FAMILY_ADDRESS_SIZE(p.family) != p.address_size)
 494                 return varlink_error(link, "io.systemd.UserDatabase.BadAddressSize", NULL);
 495
 496         if (!validate_and_mangle_flags(NULL, &p.flags, 0))
 497                 return varlink_error_invalid_parameter(link, JSON_VARIANT_STRING_CONST("flags"));
 498
 499         r = dns_question_new_reverse(&question, p.family, &p.address);
 500         if (r < 0)
 501                 return r;
 502
 503         r = dns_query_new(m, &q, question, question, NULL, p.ifindex, p.flags|SD_RESOLVED_NO_SEARCH);
 504         if (r < 0)
 505                 return r;
 506
 507         q->varlink_request = varlink_ref(link);
 508         varlink_set_userdata(link, q);
 509
 510         q->request_family = p.family;
 511         q->request_address = p.address;
 512         q->complete = vl_method_resolve_address_complete;
 513
 514         r = dns_query_go(q);
 515         if (r < 0)
 516                 return r;
 517
 518         TAKE_PTR(q);
 519         return 1;
 520 }
 521
 522 int manager_varlink_init(Manager *m) {
 523         _cleanup_(varlink_server_unrefp) VarlinkServer *s = NULL;
 524         int r;
 525
 526         assert(m);
 527
 528         if (m->varlink_server)
 529                 return 0;
 530
 531         r = varlink_server_new(&s, VARLINK_SERVER_ACCOUNT_UID);
 532         if (r < 0)
 533                 return log_error_errno(r, "Failed to allocate varlink server object: %m");
 534
 535         varlink_server_set_userdata(s, m);
 536
 537         r = varlink_server_bind_method_many(
 538                         s,
 539                         "io.systemd.Resolve.ResolveHostname",  vl_method_resolve_hostname,
 540                         "io.systemd.Resolve.ResolveAddress", vl_method_resolve_address);
 541         if (r < 0)
 542                 return log_error_errno(r, "Failed to register varlink methods: %m");
 543
 544         r = varlink_server_bind_disconnect(s, vl_on_disconnect);
 545         if (r < 0)
 546                 return log_error_errno(r, "Failed to register varlink disconnect handler: %m");
 547
 548         r = varlink_server_listen_address(s, "/run/systemd/resolve/io.systemd.Resolve", 0666);
 549         if (r < 0)
 550                 return log_error_errno(r, "Failed to bind to varlink socket: %m");
 551
 552         r = varlink_server_attach_event(s, m->event, SD_EVENT_PRIORITY_NORMAL);
 553         if (r < 0)
 554                 return log_error_errno(r, "Failed to attach varlink connection to event loop: %m");
 555
 556         m->varlink_server = TAKE_PTR(s);
 557         return 0;
 558 }
 559
 560 void manager_varlink_done(Manager *m) {
 561         assert(m);
 562
 563         m->varlink_server = varlink_server_unref(m->varlink_server);
 564 }