| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include "alloc-util.h" |
| #include "bus-common-errors.h" |
| #include "bus-util.h" |
| #include "dns-domain.h" |
| #include "memory-util.h" |
| #include "missing_capability.h" |
| #include "resolved-bus.h" |
| #include "resolved-def.h" |
| #include "resolved-dns-synthesize.h" |
| #include "resolved-dnssd-bus.h" |
| #include "resolved-dnssd.h" |
| #include "resolved-link-bus.h" |
| #include "user-util.h" |
| #include "utf8.h" |
| |
| BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_resolve_support, resolve_support, ResolveSupport); |
| |
| static int reply_query_state(DnsQuery *q) { |
| |
| switch (q->state) { |
| |
| case DNS_TRANSACTION_NO_SERVERS: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); |
| |
| case DNS_TRANSACTION_TIMEOUT: |
| return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out"); |
| |
| case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED: |
| return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed"); |
| |
| case DNS_TRANSACTION_INVALID_REPLY: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply"); |
| |
| case DNS_TRANSACTION_ERRNO: |
| return sd_bus_reply_method_errnof(q->request, q->answer_errno, "Lookup failed due to system error: %m"); |
| |
| case DNS_TRANSACTION_ABORTED: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "Query aborted"); |
| |
| case DNS_TRANSACTION_DNSSEC_FAILED: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_DNSSEC_FAILED, "DNSSEC validation failed: %s", |
| dnssec_result_to_string(q->answer_dnssec_result)); |
| |
| case DNS_TRANSACTION_NO_TRUST_ANCHOR: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_TRUST_ANCHOR, "No suitable trust anchor known"); |
| |
| case DNS_TRANSACTION_RR_TYPE_UNSUPPORTED: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_RR_TYPE_UNSUPPORTED, "Server does not support requested resource record type"); |
| |
| case DNS_TRANSACTION_NETWORK_DOWN: |
| return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NETWORK_DOWN, "Network is down"); |
| |
| case DNS_TRANSACTION_NOT_FOUND: |
| /* We return this as NXDOMAIN. This is only generated when a host doesn't implement LLMNR/TCP, and we |
| * thus quickly know that we cannot resolve an in-addr.arpa or ip6.arpa address. */ |
| return sd_bus_reply_method_errorf(q->request, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", dns_query_string(q)); |
| |
| case DNS_TRANSACTION_RCODE_FAILURE: { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| |
| if (q->answer_rcode == DNS_RCODE_NXDOMAIN) |
| sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", dns_query_string(q)); |
| else { |
| const char *rc, *n; |
| char p[DECIMAL_STR_MAX(q->answer_rcode)]; |
| |
| rc = dns_rcode_to_string(q->answer_rcode); |
| if (!rc) { |
| sprintf(p, "%i", q->answer_rcode); |
| rc = p; |
| } |
| |
| n = strjoina(_BUS_ERROR_DNS, rc); |
| sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error %s", dns_query_string(q), rc); |
| } |
| |
| return sd_bus_reply_method_error(q->request, &error); |
| } |
| |
| case DNS_TRANSACTION_NULL: |
| case DNS_TRANSACTION_PENDING: |
| case DNS_TRANSACTION_VALIDATING: |
| case DNS_TRANSACTION_SUCCESS: |
| default: |
| assert_not_reached("Impossible state"); |
| } |
| } |
| |
| static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifindex) { |
| int r; |
| |
| assert(reply); |
| assert(rr); |
| |
| r = sd_bus_message_open_container(reply, 'r', "iiay"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(reply, "i", ifindex); |
| if (r < 0) |
| return r; |
| |
| if (rr->key->type == DNS_TYPE_A) { |
| r = sd_bus_message_append(reply, "i", AF_INET); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr)); |
| |
| } else if (rr->key->type == DNS_TYPE_AAAA) { |
| r = sd_bus_message_append(reply, "i", AF_INET6); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr)); |
| } else |
| return -EAFNOSUPPORT; |
| |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static void bus_method_resolve_hostname_complete(DnsQuery *q) { |
| _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL; |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| _cleanup_free_ char *normalized = NULL; |
| DnsResourceRecord *rr; |
| unsigned added = 0; |
| int ifindex, r; |
| |
| assert(q); |
| |
| if (q->state != DNS_TRANSACTION_SUCCESS) { |
| r = reply_query_state(q); |
| goto finish; |
| } |
| |
| r = dns_query_process_cname(q); |
| if (r == -ELOOP) { |
| 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)); |
| goto finish; |
| } |
| if (r < 0) |
| goto finish; |
| if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */ |
| return; |
| |
| r = sd_bus_message_new_method_return(q->request, &reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iiay)"); |
| if (r < 0) |
| goto finish; |
| |
| DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) { |
| DnsQuestion *question; |
| |
| question = dns_query_question_for_protocol(q, q->answer_protocol); |
| |
| r = dns_question_matches_rr(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain)); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| r = append_address(reply, rr, ifindex); |
| if (r < 0) |
| goto finish; |
| |
| if (!canonical) |
| canonical = dns_resource_record_ref(rr); |
| |
| added++; |
| } |
| |
| if (added <= 0) { |
| 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)); |
| goto finish; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| goto finish; |
| |
| /* The key names are not necessarily normalized, make sure that they are when we return them to our bus |
| * clients. */ |
| r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized); |
| if (r < 0) |
| goto finish; |
| |
| /* Return the precise spelling and uppercasing and CNAME target reported by the server */ |
| assert(canonical); |
| r = sd_bus_message_append( |
| reply, "st", |
| normalized, |
| SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q))); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_send(q->manager->bus, reply, NULL); |
| |
| finish: |
| if (r < 0) { |
| log_error_errno(r, "Failed to send hostname reply: %m"); |
| sd_bus_reply_method_errno(q->request, r, NULL); |
| } |
| |
| dns_query_free(q); |
| } |
| |
| static int check_ifindex_flags(int ifindex, uint64_t *flags, uint64_t ok, sd_bus_error *error) { |
| assert(flags); |
| |
| if (ifindex < 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index"); |
| |
| if (*flags & ~(SD_RESOLVED_PROTOCOLS_ALL|SD_RESOLVED_NO_CNAME|ok)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter"); |
| |
| if ((*flags & SD_RESOLVED_PROTOCOLS_ALL) == 0) /* If no protocol is enabled, enable all */ |
| *flags |= SD_RESOLVED_PROTOCOLS_ALL; |
| |
| return 0; |
| } |
| |
| static int parse_as_address(sd_bus_message *m, int ifindex, const char *hostname, int family, uint64_t flags) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| _cleanup_free_ char *canonical = NULL; |
| union in_addr_union parsed; |
| int r, ff, parsed_ifindex = 0; |
| |
| /* Check if the hostname is actually already an IP address formatted as string. In that case just parse it, |
| * let's not attempt to look it up. */ |
| |
| r = in_addr_ifindex_from_string_auto(hostname, &ff, &parsed, &parsed_ifindex); |
| if (r < 0) /* not an address */ |
| return 0; |
| |
| if (family != AF_UNSPEC && ff != family) |
| return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address is not of the requested family."); |
| if (ifindex > 0 && parsed_ifindex > 0 && parsed_ifindex != ifindex) |
| return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address interface index does not match requested interface."); |
| |
| if (parsed_ifindex > 0) |
| ifindex = parsed_ifindex; |
| |
| r = sd_bus_message_new_method_return(m, &reply); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iiay)"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(reply, 'r', "iiay"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(reply, "ii", ifindex, ff); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_array(reply, 'y', &parsed, FAMILY_ADDRESS_SIZE(ff)); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| /* When an IP address is specified we just return it as canonical name, in order to avoid a DNS |
| * look-up. However, we reformat it to make sure it's in a truly canonical form (i.e. on IPv6 the inner |
| * omissions are always done the same way). */ |
| r = in_addr_ifindex_to_string(ff, &parsed, ifindex, &canonical); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(reply, "st", canonical, |
| SD_RESOLVED_FLAGS_MAKE(dns_synthesize_protocol(flags), ff, true)); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_send(sd_bus_message_get_bus(m), reply, NULL); |
| } |
| |
| static int bus_method_resolve_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL; |
| Manager *m = userdata; |
| const char *hostname; |
| int family, ifindex; |
| uint64_t flags; |
| DnsQuery *q; |
| int r; |
| |
| assert(message); |
| assert(m); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| |
| r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); |
| |
| r = check_ifindex_flags(ifindex, &flags, SD_RESOLVED_NO_SEARCH, error); |
| if (r < 0) |
| return r; |
| |
| r = parse_as_address(message, ifindex, hostname, family, flags); |
| if (r != 0) |
| return r; |
| |
| r = dns_name_is_valid(hostname); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname); |
| |
| r = dns_question_new_address(&question_utf8, family, hostname, false); |
| if (r < 0) |
| return r; |
| |
| r = dns_question_new_address(&question_idna, family, hostname, true); |
| if (r < 0 && r != -EALREADY) |
| return r; |
| |
| r = dns_query_new(m, &q, question_utf8, question_idna ?: question_utf8, ifindex, flags); |
| if (r < 0) |
| return r; |
| |
| q->request = sd_bus_message_ref(message); |
| q->request_family = family; |
| q->complete = bus_method_resolve_hostname_complete; |
| q->suppress_unroutable_family = family == AF_UNSPEC; |
| |
| r = dns_query_bus_track(q, message); |
| if (r < 0) |
| goto fail; |
| |
| r = dns_query_go(q); |
| if (r < 0) |
| goto fail; |
| |
| return 1; |
| |
| fail: |
| dns_query_free(q); |
| return r; |
| } |
| |
| static void bus_method_resolve_address_complete(DnsQuery *q) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| DnsQuestion *question; |
| DnsResourceRecord *rr; |
| unsigned added = 0; |
| int ifindex, r; |
| |
| assert(q); |
| |
| if (q->state != DNS_TRANSACTION_SUCCESS) { |
| r = reply_query_state(q); |
| goto finish; |
| } |
| |
| r = dns_query_process_cname(q); |
| if (r == -ELOOP) { |
| 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)); |
| goto finish; |
| } |
| if (r < 0) |
| goto finish; |
| if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */ |
| return; |
| |
| r = sd_bus_message_new_method_return(q->request, &reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(is)"); |
| if (r < 0) |
| goto finish; |
| |
| question = dns_query_question_for_protocol(q, q->answer_protocol); |
| |
| DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) { |
| _cleanup_free_ char *normalized = NULL; |
| |
| r = dns_question_matches_rr(question, rr, NULL); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| r = dns_name_normalize(rr->ptr.name, 0, &normalized); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_append(reply, "(is)", ifindex, normalized); |
| if (r < 0) |
| goto finish; |
| |
| added++; |
| } |
| |
| if (added <= 0) { |
| _cleanup_free_ char *ip = NULL; |
| |
| (void) in_addr_to_string(q->request_family, &q->request_address, &ip); |
| r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, |
| "Address '%s' does not have any RR of requested type", strnull(ip)); |
| goto finish; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q))); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_send(q->manager->bus, reply, NULL); |
| |
| finish: |
| if (r < 0) { |
| log_error_errno(r, "Failed to send address reply: %m"); |
| sd_bus_reply_method_errno(q->request, r, NULL); |
| } |
| |
| dns_query_free(q); |
| } |
| |
| static int bus_method_resolve_address(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; |
| Manager *m = userdata; |
| int family, ifindex; |
| uint64_t flags; |
| const void *d; |
| DnsQuery *q; |
| size_t sz; |
| int r; |
| |
| assert(message); |
| assert(m); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| |
| r = sd_bus_message_read(message, "ii", &ifindex, &family); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(family, AF_INET, AF_INET6)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); |
| |
| r = sd_bus_message_read_array(message, 'y', &d, &sz); |
| if (r < 0) |
| return r; |
| |
| if (sz != FAMILY_ADDRESS_SIZE(family)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size"); |
| |
| r = sd_bus_message_read(message, "t", &flags); |
| if (r < 0) |
| return r; |
| |
| r = check_ifindex_flags(ifindex, &flags, 0, error); |
| if (r < 0) |
| return r; |
| |
| r = dns_question_new_reverse(&question, family, d); |
| if (r < 0) |
| return r; |
| |
| r = dns_query_new(m, &q, question, question, ifindex, flags|SD_RESOLVED_NO_SEARCH); |
| if (r < 0) |
| return r; |
| |
| q->request = sd_bus_message_ref(message); |
| q->request_family = family; |
| memcpy(&q->request_address, d, sz); |
| q->complete = bus_method_resolve_address_complete; |
| |
| r = dns_query_bus_track(q, message); |
| if (r < 0) |
| goto fail; |
| |
| r = dns_query_go(q); |
| if (r < 0) |
| goto fail; |
| |
| return 1; |
| |
| fail: |
| dns_query_free(q); |
| return r; |
| } |
| |
| static int bus_message_append_rr(sd_bus_message *m, DnsResourceRecord *rr, int ifindex) { |
| int r; |
| |
| assert(m); |
| assert(rr); |
| |
| r = sd_bus_message_open_container(m, 'r', "iqqay"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "iqq", |
| ifindex, |
| rr->key->class, |
| rr->key->type); |
| if (r < 0) |
| return r; |
| |
| r = dns_resource_record_to_wire_format(rr, false); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_array(m, 'y', rr->wire_format, rr->wire_format_size); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_message_close_container(m); |
| } |
| |
| static void bus_method_resolve_record_complete(DnsQuery *q) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| DnsResourceRecord *rr; |
| DnsQuestion *question; |
| unsigned added = 0; |
| int ifindex; |
| int r; |
| |
| assert(q); |
| |
| if (q->state != DNS_TRANSACTION_SUCCESS) { |
| r = reply_query_state(q); |
| goto finish; |
| } |
| |
| r = dns_query_process_cname(q); |
| if (r == -ELOOP) { |
| 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)); |
| goto finish; |
| } |
| if (r < 0) |
| goto finish; |
| if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */ |
| return; |
| |
| r = sd_bus_message_new_method_return(q->request, &reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iqqay)"); |
| if (r < 0) |
| goto finish; |
| |
| question = dns_query_question_for_protocol(q, q->answer_protocol); |
| |
| DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) { |
| r = dns_question_matches_rr(question, rr, NULL); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| r = bus_message_append_rr(reply, rr, ifindex); |
| if (r < 0) |
| goto finish; |
| |
| added++; |
| } |
| |
| if (added <= 0) { |
| 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)); |
| goto finish; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q))); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_send(q->manager->bus, reply, NULL); |
| |
| finish: |
| if (r < 0) { |
| log_error_errno(r, "Failed to send record reply: %m"); |
| sd_bus_reply_method_errno(q->request, r, NULL); |
| } |
| |
| dns_query_free(q); |
| } |
| |
| static int bus_method_resolve_record(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; |
| _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; |
| Manager *m = userdata; |
| uint16_t class, type; |
| const char *name; |
| int r, ifindex; |
| uint64_t flags; |
| DnsQuery *q; |
| |
| assert(message); |
| assert(m); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| |
| r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags); |
| if (r < 0) |
| return r; |
| |
| r = dns_name_is_valid(name); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name); |
| |
| if (!dns_type_is_valid_query(type)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified resource record type %" PRIu16 " may not be used in a query.", type); |
| if (dns_type_is_zone_transer(type)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Zone transfers not permitted via this programming interface."); |
| if (dns_type_is_obsolete(type)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Specified DNS resource record type %" PRIu16 " is obsolete.", type); |
| |
| r = check_ifindex_flags(ifindex, &flags, 0, error); |
| if (r < 0) |
| return r; |
| |
| question = dns_question_new(1); |
| if (!question) |
| return -ENOMEM; |
| |
| key = dns_resource_key_new(class, type, name); |
| if (!key) |
| return -ENOMEM; |
| |
| r = dns_question_add(question, key); |
| if (r < 0) |
| return r; |
| |
| r = dns_query_new(m, &q, question, question, ifindex, flags|SD_RESOLVED_NO_SEARCH); |
| if (r < 0) |
| return r; |
| |
| /* Let's request that the TTL is fixed up for locally cached entries, after all we return it in the wire format |
| * blob */ |
| q->clamp_ttl = true; |
| |
| q->request = sd_bus_message_ref(message); |
| q->complete = bus_method_resolve_record_complete; |
| |
| r = dns_query_bus_track(q, message); |
| if (r < 0) |
| goto fail; |
| |
| r = dns_query_go(q); |
| if (r < 0) |
| goto fail; |
| |
| return 1; |
| |
| fail: |
| dns_query_free(q); |
| return r; |
| } |
| |
| static int append_srv(DnsQuery *q, sd_bus_message *reply, DnsResourceRecord *rr) { |
| _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL; |
| _cleanup_free_ char *normalized = NULL; |
| DnsQuery *aux; |
| int r; |
| |
| assert(q); |
| assert(reply); |
| assert(rr); |
| assert(rr->key); |
| |
| if (rr->key->type != DNS_TYPE_SRV) |
| return 0; |
| |
| if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) { |
| /* First, let's see if we could find an appropriate A or AAAA |
| * record for the SRV record */ |
| LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) { |
| DnsResourceRecord *zz; |
| DnsQuestion *question; |
| |
| if (aux->state != DNS_TRANSACTION_SUCCESS) |
| continue; |
| if (aux->auxiliary_result != 0) |
| continue; |
| |
| question = dns_query_question_for_protocol(aux, aux->answer_protocol); |
| |
| r = dns_name_equal(dns_question_first_name(question), rr->srv.name); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| continue; |
| |
| DNS_ANSWER_FOREACH(zz, aux->answer) { |
| |
| r = dns_question_matches_rr(question, zz, NULL); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| continue; |
| |
| canonical = dns_resource_record_ref(zz); |
| break; |
| } |
| |
| if (canonical) |
| break; |
| } |
| |
| /* Is there are successful A/AAAA lookup for this SRV RR? If not, don't add it */ |
| if (!canonical) |
| return 0; |
| } |
| |
| r = sd_bus_message_open_container(reply, 'r', "qqqsa(iiay)s"); |
| if (r < 0) |
| return r; |
| |
| r = dns_name_normalize(rr->srv.name, 0, &normalized); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append( |
| reply, |
| "qqqs", |
| rr->srv.priority, rr->srv.weight, rr->srv.port, normalized); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iiay)"); |
| if (r < 0) |
| return r; |
| |
| if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) { |
| LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) { |
| DnsResourceRecord *zz; |
| DnsQuestion *question; |
| int ifindex; |
| |
| if (aux->state != DNS_TRANSACTION_SUCCESS) |
| continue; |
| if (aux->auxiliary_result != 0) |
| continue; |
| |
| question = dns_query_question_for_protocol(aux, aux->answer_protocol); |
| |
| r = dns_name_equal(dns_question_first_name(question), rr->srv.name); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| continue; |
| |
| DNS_ANSWER_FOREACH_IFINDEX(zz, ifindex, aux->answer) { |
| |
| r = dns_question_matches_rr(question, zz, NULL); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| continue; |
| |
| r = append_address(reply, zz, ifindex); |
| if (r < 0) |
| return r; |
| } |
| } |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| if (canonical) { |
| normalized = mfree(normalized); |
| |
| r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized); |
| if (r < 0) |
| return r; |
| } |
| |
| /* Note that above we appended the hostname as encoded in the |
| * SRV, and here the canonical hostname this maps to. */ |
| r = sd_bus_message_append(reply, "s", normalized); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static int append_txt(sd_bus_message *reply, DnsResourceRecord *rr) { |
| DnsTxtItem *i; |
| int r; |
| |
| assert(reply); |
| assert(rr); |
| assert(rr->key); |
| |
| if (rr->key->type != DNS_TYPE_TXT) |
| return 0; |
| |
| LIST_FOREACH(items, i, rr->txt.items) { |
| |
| if (i->length <= 0) |
| continue; |
| |
| r = sd_bus_message_append_array(reply, 'y', i->data, i->length); |
| if (r < 0) |
| return r; |
| } |
| |
| return 1; |
| } |
| |
| static void resolve_service_all_complete(DnsQuery *q) { |
| _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL; |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| _cleanup_free_ char *name = NULL, *type = NULL, *domain = NULL; |
| DnsQuestion *question; |
| DnsResourceRecord *rr; |
| unsigned added = 0; |
| DnsQuery *aux; |
| int r; |
| |
| assert(q); |
| |
| if (q->block_all_complete > 0) |
| return; |
| |
| if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) { |
| DnsQuery *bad = NULL; |
| bool have_success = false; |
| |
| LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) { |
| |
| switch (aux->state) { |
| |
| case DNS_TRANSACTION_PENDING: |
| /* If an auxiliary query is still pending, let's wait */ |
| return; |
| |
| case DNS_TRANSACTION_SUCCESS: |
| if (aux->auxiliary_result == 0) |
| have_success = true; |
| else |
| bad = aux; |
| break; |
| |
| default: |
| bad = aux; |
| break; |
| } |
| } |
| |
| if (!have_success) { |
| /* We can only return one error, hence pick the last error we encountered */ |
| |
| assert(bad); |
| |
| if (bad->state == DNS_TRANSACTION_SUCCESS) { |
| assert(bad->auxiliary_result != 0); |
| |
| if (bad->auxiliary_result == -ELOOP) { |
| 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)); |
| goto finish; |
| } |
| |
| r = bad->auxiliary_result; |
| goto finish; |
| } |
| |
| r = reply_query_state(bad); |
| goto finish; |
| } |
| } |
| |
| r = sd_bus_message_new_method_return(q->request, &reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(qqqsa(iiay)s)"); |
| if (r < 0) |
| goto finish; |
| |
| question = dns_query_question_for_protocol(q, q->answer_protocol); |
| DNS_ANSWER_FOREACH(rr, q->answer) { |
| r = dns_question_matches_rr(question, rr, NULL); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| r = append_srv(q, reply, rr); |
| if (r < 0) |
| goto finish; |
| if (r == 0) /* not an SRV record */ |
| continue; |
| |
| if (!canonical) |
| canonical = dns_resource_record_ref(rr); |
| |
| added++; |
| } |
| |
| if (added <= 0) { |
| 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)); |
| goto finish; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_open_container(reply, 'a', "ay"); |
| if (r < 0) |
| goto finish; |
| |
| DNS_ANSWER_FOREACH(rr, q->answer) { |
| r = dns_question_matches_rr(question, rr, NULL); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| r = append_txt(reply, rr); |
| if (r < 0) |
| goto finish; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| goto finish; |
| |
| assert(canonical); |
| r = dns_service_split(dns_resource_key_name(canonical->key), &name, &type, &domain); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_message_append( |
| reply, |
| "ssst", |
| name, type, domain, |
| SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family, dns_query_fully_authenticated(q))); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_bus_send(q->manager->bus, reply, NULL); |
| |
| finish: |
| if (r < 0) { |
| log_error_errno(r, "Failed to send service reply: %m"); |
| sd_bus_reply_method_errno(q->request, r, NULL); |
| } |
| |
| dns_query_free(q); |
| } |
| |
| static void resolve_service_hostname_complete(DnsQuery *q) { |
| int r; |
| |
| assert(q); |
| assert(q->auxiliary_for); |
| |
| if (q->state != DNS_TRANSACTION_SUCCESS) { |
| resolve_service_all_complete(q->auxiliary_for); |
| return; |
| } |
| |
| r = dns_query_process_cname(q); |
| if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */ |
| return; |
| |
| /* This auxiliary lookup is finished or failed, let's see if all are finished now. */ |
| q->auxiliary_result = r; |
| resolve_service_all_complete(q->auxiliary_for); |
| } |
| |
| static int resolve_service_hostname(DnsQuery *q, DnsResourceRecord *rr, int ifindex) { |
| _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; |
| DnsQuery *aux; |
| int r; |
| |
| assert(q); |
| assert(rr); |
| assert(rr->key); |
| assert(rr->key->type == DNS_TYPE_SRV); |
| |
| /* OK, we found an SRV record for the service. Let's resolve |
| * the hostname included in it */ |
| |
| r = dns_question_new_address(&question, q->request_family, rr->srv.name, false); |
| if (r < 0) |
| return r; |
| |
| r = dns_query_new(q->manager, &aux, question, question, ifindex, q->flags|SD_RESOLVED_NO_SEARCH); |
| if (r < 0) |
| return r; |
| |
| aux->request_family = q->request_family; |
| aux->complete = resolve_service_hostname_complete; |
| |
| r = dns_query_make_auxiliary(aux, q); |
| if (r == -EAGAIN) { |
| /* Too many auxiliary lookups? If so, don't complain, |
| * let's just not add this one, we already have more |
| * than enough */ |
| |
| dns_query_free(aux); |
| return 0; |
| } |
| if (r < 0) |
| goto fail; |
| |
| /* Note that auxiliary queries do not track the original bus |
| * client, only the primary request does that. */ |
| |
| r = dns_query_go(aux); |
| if (r < 0) |
| goto fail; |
| |
| return 1; |
| |
| fail: |
| dns_query_free(aux); |
| return r; |
| } |
| |
| static void bus_method_resolve_service_complete(DnsQuery *q) { |
| bool has_root_domain = false; |
| DnsResourceRecord *rr; |
| DnsQuestion *question; |
| unsigned found = 0; |
| int ifindex, r; |
| |
| assert(q); |
| |
| if (q->state != DNS_TRANSACTION_SUCCESS) { |
| r = reply_query_state(q); |
| goto finish; |
| } |
| |
| r = dns_query_process_cname(q); |
| if (r == -ELOOP) { |
| 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)); |
| goto finish; |
| } |
| if (r < 0) |
| goto finish; |
| if (r == DNS_QUERY_RESTARTED) /* This was a cname, and the query was restarted. */ |
| return; |
| |
| question = dns_query_question_for_protocol(q, q->answer_protocol); |
| |
| DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) { |
| r = dns_question_matches_rr(question, rr, NULL); |
| if (r < 0) |
| goto finish; |
| if (r == 0) |
| continue; |
| |
| if (rr->key->type != DNS_TYPE_SRV) |
| continue; |
| |
| if (dns_name_is_root(rr->srv.name)) { |
| has_root_domain = true; |
| continue; |
| } |
| |
| if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) { |
| q->block_all_complete++; |
| r = resolve_service_hostname(q, rr, ifindex); |
| q->block_all_complete--; |
| |
| if (r < 0) |
| goto finish; |
| } |
| |
| found++; |
| } |
| |
| if (has_root_domain && found <= 0) { |
| /* If there's exactly one SRV RR and it uses |
| * the root domain as host name, then the |
| * service is explicitly not offered on the |
| * domain. Report this as a recognizable |
| * error. See RFC 2782, Section "Usage |
| * Rules". */ |
| r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_SERVICE, "'%s' does not provide the requested service", dns_query_string(q)); |
| goto finish; |
| } |
| |
| if (found <= 0) { |
| 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)); |
| goto finish; |
| } |
| |
| /* Maybe we are already finished? check now... */ |
| resolve_service_all_complete(q); |
| return; |
| |
| finish: |
| if (r < 0) { |
| log_error_errno(r, "Failed to send service reply: %m"); |
| sd_bus_reply_method_errno(q->request, r, NULL); |
| } |
| |
| dns_query_free(q); |
| } |
| |
| static int bus_method_resolve_service(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL; |
| const char *name, *type, *domain; |
| Manager *m = userdata; |
| int family, ifindex; |
| uint64_t flags; |
| DnsQuery *q; |
| int r; |
| |
| assert(message); |
| assert(m); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| |
| r = sd_bus_message_read(message, "isssit", &ifindex, &name, &type, &domain, &family, &flags); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); |
| |
| if (isempty(name)) |
| name = NULL; |
| else if (!dns_service_name_is_valid(name)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service name '%s'", name); |
| |
| if (isempty(type)) |
| type = NULL; |
| else if (!dns_srv_type_is_valid(type)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid SRV service type '%s'", type); |
| |
| r = dns_name_is_valid(domain); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid domain '%s'", domain); |
| |
| if (name && !type) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Service name cannot be specified without service type."); |
| |
| r = check_ifindex_flags(ifindex, &flags, SD_RESOLVED_NO_TXT|SD_RESOLVED_NO_ADDRESS, error); |
| if (r < 0) |
| return r; |
| |
| r = dns_question_new_service(&question_utf8, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), false); |
| if (r < 0) |
| return r; |
| |
| r = dns_question_new_service(&question_idna, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), true); |
| if (r < 0) |
| return r; |
| |
| r = dns_query_new(m, &q, question_utf8, question_idna, ifindex, flags|SD_RESOLVED_NO_SEARCH); |
| if (r < 0) |
| return r; |
| |
| q->request = sd_bus_message_ref(message); |
| q->request_family = family; |
| q->complete = bus_method_resolve_service_complete; |
| |
| r = dns_query_bus_track(q, message); |
| if (r < 0) |
| goto fail; |
| |
| r = dns_query_go(q); |
| if (r < 0) |
| goto fail; |
| |
| return 1; |
| |
| fail: |
| dns_query_free(q); |
| return r; |
| } |
| |
| int bus_dns_server_append(sd_bus_message *reply, DnsServer *s, bool with_ifindex) { |
| int r; |
| |
| assert(reply); |
| |
| if (!s) { |
| if (with_ifindex) |
| return sd_bus_message_append(reply, "(iiay)", 0, AF_UNSPEC, 0); |
| else |
| return sd_bus_message_append(reply, "(iay)", AF_UNSPEC, 0); |
| } |
| |
| r = sd_bus_message_open_container(reply, 'r', with_ifindex ? "iiay" : "iay"); |
| if (r < 0) |
| return r; |
| |
| if (with_ifindex) { |
| r = sd_bus_message_append(reply, "i", dns_server_ifindex(s)); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_append(reply, "i", s->family); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_array(reply, 'y', &s->address, FAMILY_ADDRESS_SIZE(s->family)); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| static int bus_property_get_dns_servers( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Manager *m = userdata; |
| DnsServer *s; |
| Iterator i; |
| Link *l; |
| int r; |
| |
| assert(reply); |
| assert(m); |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iiay)"); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(servers, s, m->dns_servers) { |
| r = bus_dns_server_append(reply, s, true); |
| if (r < 0) |
| return r; |
| } |
| |
| HASHMAP_FOREACH(l, m->links, i) { |
| LIST_FOREACH(servers, s, l->dns_servers) { |
| r = bus_dns_server_append(reply, s, true); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| static int bus_property_get_fallback_dns_servers( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| DnsServer *s, **f = userdata; |
| int r; |
| |
| assert(reply); |
| assert(f); |
| |
| r = sd_bus_message_open_container(reply, 'a', "(iiay)"); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(servers, s, *f) { |
| r = bus_dns_server_append(reply, s, true); |
| if (r < 0) |
| return r; |
| } |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| static int bus_property_get_current_dns_server( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| DnsServer *s; |
| |
| assert(reply); |
| assert(userdata); |
| |
| s = *(DnsServer **) userdata; |
| |
| return bus_dns_server_append(reply, s, true); |
| } |
| |
| static int bus_property_get_domains( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Manager *m = userdata; |
| DnsSearchDomain *d; |
| Iterator i; |
| Link *l; |
| int r; |
| |
| assert(reply); |
| assert(m); |
| |
| r = sd_bus_message_open_container(reply, 'a', "(isb)"); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(domains, d, m->search_domains) { |
| r = sd_bus_message_append(reply, "(isb)", 0, d->name, d->route_only); |
| if (r < 0) |
| return r; |
| } |
| |
| HASHMAP_FOREACH(l, m->links, i) { |
| LIST_FOREACH(domains, d, l->search_domains) { |
| r = sd_bus_message_append(reply, "(isb)", l->ifindex, d->name, d->route_only); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| static int bus_property_get_transaction_statistics( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Manager *m = userdata; |
| |
| assert(reply); |
| assert(m); |
| |
| return sd_bus_message_append(reply, "(tt)", |
| (uint64_t) hashmap_size(m->dns_transactions), |
| (uint64_t) m->n_transactions_total); |
| } |
| |
| static int bus_property_get_cache_statistics( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| uint64_t size = 0, hit = 0, miss = 0; |
| Manager *m = userdata; |
| DnsScope *s; |
| |
| assert(reply); |
| assert(m); |
| |
| LIST_FOREACH(scopes, s, m->dns_scopes) { |
| size += dns_cache_size(&s->cache); |
| hit += s->cache.n_hit; |
| miss += s->cache.n_miss; |
| } |
| |
| return sd_bus_message_append(reply, "(ttt)", size, hit, miss); |
| } |
| |
| static int bus_property_get_dnssec_statistics( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Manager *m = userdata; |
| |
| assert(reply); |
| assert(m); |
| |
| return sd_bus_message_append(reply, "(tttt)", |
| (uint64_t) m->n_dnssec_verdict[DNSSEC_SECURE], |
| (uint64_t) m->n_dnssec_verdict[DNSSEC_INSECURE], |
| (uint64_t) m->n_dnssec_verdict[DNSSEC_BOGUS], |
| (uint64_t) m->n_dnssec_verdict[DNSSEC_INDETERMINATE]); |
| } |
| |
| static int bus_property_get_ntas( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Manager *m = userdata; |
| const char *domain; |
| Iterator i; |
| int r; |
| |
| assert(reply); |
| assert(m); |
| |
| r = sd_bus_message_open_container(reply, 'a', "s"); |
| if (r < 0) |
| return r; |
| |
| SET_FOREACH(domain, m->trust_anchor.negative_by_name, i) { |
| r = sd_bus_message_append(reply, "s", domain); |
| if (r < 0) |
| return r; |
| } |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| static BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_dns_stub_listener_mode, dns_stub_listener_mode, DnsStubListenerMode); |
| static BUS_DEFINE_PROPERTY_GET(bus_property_get_dnssec_supported, "b", Manager, manager_dnssec_supported); |
| static BUS_DEFINE_PROPERTY_GET2(bus_property_get_dnssec_mode, "s", Manager, manager_get_dnssec_mode, dnssec_mode_to_string); |
| 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); |
| |
| static int bus_method_reset_statistics(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Manager *m = userdata; |
| DnsScope *s; |
| |
| assert(message); |
| assert(m); |
| |
| LIST_FOREACH(scopes, s, m->dns_scopes) |
| s->cache.n_hit = s->cache.n_miss = 0; |
| |
| m->n_transactions_total = 0; |
| zero(m->n_dnssec_verdict); |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int get_any_link(Manager *m, int ifindex, Link **ret, sd_bus_error *error) { |
| Link *l; |
| |
| assert(m); |
| assert(ret); |
| |
| if (ifindex <= 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index"); |
| |
| l = hashmap_get(m->links, INT_TO_PTR(ifindex)); |
| if (!l) |
| return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %i not known", ifindex); |
| |
| *ret = l; |
| return 0; |
| } |
| |
| static int call_link_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) { |
| int ifindex, r; |
| Link *l; |
| |
| assert(m); |
| assert(message); |
| assert(handler); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| r = sd_bus_message_read(message, "i", &ifindex); |
| if (r < 0) |
| return r; |
| |
| r = get_any_link(m, ifindex, &l, error); |
| if (r < 0) |
| return r; |
| |
| return handler(message, l, error); |
| } |
| |
| static int bus_method_set_link_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_dns_servers, error); |
| } |
| |
| static int bus_method_set_link_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_domains, error); |
| } |
| |
| static int bus_method_set_link_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_default_route, error); |
| } |
| |
| static int bus_method_set_link_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_llmnr, error); |
| } |
| |
| static int bus_method_set_link_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_mdns, error); |
| } |
| |
| static int bus_method_set_link_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_dns_over_tls, error); |
| } |
| |
| static int bus_method_set_link_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_dnssec, error); |
| } |
| |
| static int bus_method_set_link_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_set_dnssec_negative_trust_anchors, error); |
| } |
| |
| static int bus_method_revert_link(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| return call_link_method(userdata, message, bus_link_method_revert, error); |
| } |
| |
| static int bus_method_get_link(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_free_ char *p = NULL; |
| Manager *m = userdata; |
| int r, ifindex; |
| Link *l; |
| |
| assert(message); |
| assert(m); |
| |
| assert_cc(sizeof(int) == sizeof(int32_t)); |
| r = sd_bus_message_read(message, "i", &ifindex); |
| if (r < 0) |
| return r; |
| |
| r = get_any_link(m, ifindex, &l, error); |
| if (r < 0) |
| return r; |
| |
| p = link_bus_path(l); |
| if (!p) |
| return -ENOMEM; |
| |
| return sd_bus_reply_method_return(message, "o", p); |
| } |
| |
| static int bus_method_flush_caches(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Manager *m = userdata; |
| |
| assert(message); |
| assert(m); |
| |
| manager_flush_caches(m); |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int bus_method_reset_server_features(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Manager *m = userdata; |
| |
| assert(message); |
| assert(m); |
| |
| manager_reset_server_features(m); |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int on_bus_track(sd_bus_track *t, void *userdata) { |
| DnssdService *s = userdata; |
| |
| assert(t); |
| assert(s); |
| |
| log_debug("Client of active request vanished, destroying DNS-SD service."); |
| dnssd_service_free(s); |
| |
| return 0; |
| } |
| |
| static int bus_method_register_service(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; |
| _cleanup_(dnssd_service_freep) DnssdService *service = NULL; |
| _cleanup_(sd_bus_track_unrefp) sd_bus_track *bus_track = NULL; |
| _cleanup_free_ char *path = NULL; |
| _cleanup_free_ char *instance_name = NULL; |
| Manager *m = userdata; |
| DnssdService *s = NULL; |
| const char *name; |
| const char *name_template; |
| const char *type; |
| uid_t euid; |
| int r; |
| |
| assert(message); |
| assert(m); |
| |
| if (m->mdns_support != RESOLVE_SUPPORT_YES) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Support for MulticastDNS is disabled"); |
| |
| r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, |
| "org.freedesktop.resolve1.register-service", |
| NULL, false, UID_INVALID, |
| &m->polkit_registry, error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Polkit will call us back */ |
| |
| service = new0(DnssdService, 1); |
| if (!service) |
| return log_oom(); |
| |
| r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_creds_get_euid(creds, &euid); |
| if (r < 0) |
| return r; |
| service->originator = euid; |
| |
| r = sd_bus_message_read(message, "sssqqq", &name, &name_template, &type, |
| &service->port, &service->priority, |
| &service->weight); |
| if (r < 0) |
| return r; |
| |
| s = hashmap_get(m->dnssd_services, name); |
| if (s) |
| return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", name); |
| |
| if (!dnssd_srv_type_is_valid(type)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service type '%s' is invalid", type); |
| |
| service->name = strdup(name); |
| if (!service->name) |
| return log_oom(); |
| |
| service->name_template = strdup(name_template); |
| if (!service->name_template) |
| return log_oom(); |
| |
| service->type = strdup(type); |
| if (!service->type) |
| return log_oom(); |
| |
| r = dnssd_render_instance_name(service, &instance_name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "a{say}"); |
| if (r < 0) |
| return r; |
| |
| while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "{say}")) > 0) { |
| _cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL; |
| DnsTxtItem *last = NULL; |
| |
| txt_data = new0(DnssdTxtData, 1); |
| if (!txt_data) |
| return log_oom(); |
| |
| while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_DICT_ENTRY, "say")) > 0) { |
| const char *key; |
| const void *value; |
| size_t size; |
| DnsTxtItem *i; |
| |
| r = sd_bus_message_read(message, "s", &key); |
| if (r < 0) |
| return r; |
| |
| if (isempty(key)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Keys in DNS-SD TXT RRs can't be empty"); |
| |
| if (!ascii_is_valid(key)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TXT key '%s' contains non-ASCII symbols", key); |
| |
| r = sd_bus_message_read_array(message, 'y', &value, &size); |
| if (r < 0) |
| return r; |
| |
| r = dnssd_txt_item_new_from_data(key, value, size, &i); |
| if (r < 0) |
| return r; |
| |
| LIST_INSERT_AFTER(items, txt_data->txt, last, i); |
| last = i; |
| |
| r = sd_bus_message_exit_container(message); |
| if (r < 0) |
| return r; |
| |
| } |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_exit_container(message); |
| if (r < 0) |
| return r; |
| |
| if (txt_data->txt) { |
| LIST_PREPEND(items, service->txt_data_items, txt_data); |
| txt_data = NULL; |
| } |
| } |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_exit_container(message); |
| if (r < 0) |
| return r; |
| |
| if (!service->txt_data_items) { |
| _cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL; |
| |
| txt_data = new0(DnssdTxtData, 1); |
| if (!txt_data) |
| return log_oom(); |
| |
| r = dns_txt_item_new_empty(&txt_data->txt); |
| if (r < 0) |
| return r; |
| |
| LIST_PREPEND(items, service->txt_data_items, txt_data); |
| txt_data = NULL; |
| } |
| |
| r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->name, &path); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_ensure_allocated(&m->dnssd_services, &string_hash_ops); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(m->dnssd_services, service->name, service); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_track_new(sd_bus_message_get_bus(message), &bus_track, on_bus_track, service); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_track_add_sender(bus_track, message); |
| if (r < 0) |
| return r; |
| |
| service->manager = m; |
| |
| service = NULL; |
| |
| manager_refresh_rrs(m); |
| |
| return sd_bus_reply_method_return(message, "o", path); |
| } |
| |
| static int call_dnssd_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) { |
| _cleanup_free_ char *name = NULL; |
| DnssdService *s = NULL; |
| const char *path; |
| int r; |
| |
| assert(m); |
| assert(message); |
| assert(handler); |
| |
| r = sd_bus_message_read(message, "o", &path); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name); |
| if (r == 0) |
| return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service with object path '%s' does not exist", path); |
| if (r < 0) |
| return r; |
| |
| s = hashmap_get(m->dnssd_services, name); |
| if (!s) |
| return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service '%s' not known", name); |
| |
| return handler(message, s, error); |
| } |
| |
| static int bus_method_unregister_service(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Manager *m = userdata; |
| |
| assert(message); |
| assert(m); |
| |
| return call_dnssd_method(m, message, bus_dnssd_method_unregister, error); |
| } |
| |
| static const sd_bus_vtable resolve_vtable[] = { |
| SD_BUS_VTABLE_START(0), |
| SD_BUS_PROPERTY("LLMNRHostname", "s", NULL, offsetof(Manager, llmnr_hostname), 0), |
| SD_BUS_PROPERTY("LLMNR", "s", bus_property_get_resolve_support, offsetof(Manager, llmnr_support), 0), |
| SD_BUS_PROPERTY("MulticastDNS", "s", bus_property_get_resolve_support, offsetof(Manager, mdns_support), 0), |
| SD_BUS_PROPERTY("DNSOverTLS", "s", bus_property_get_dns_over_tls_mode, 0, 0), |
| SD_BUS_PROPERTY("DNS", "a(iiay)", bus_property_get_dns_servers, 0, 0), |
| SD_BUS_PROPERTY("FallbackDNS", "a(iiay)", bus_property_get_fallback_dns_servers, offsetof(Manager, fallback_dns_servers), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("CurrentDNSServer", "(iiay)", bus_property_get_current_dns_server, offsetof(Manager, current_dns_server), 0), |
| SD_BUS_PROPERTY("Domains", "a(isb)", bus_property_get_domains, 0, 0), |
| SD_BUS_PROPERTY("TransactionStatistics", "(tt)", bus_property_get_transaction_statistics, 0, 0), |
| SD_BUS_PROPERTY("CacheStatistics", "(ttt)", bus_property_get_cache_statistics, 0, 0), |
| SD_BUS_PROPERTY("DNSSEC", "s", bus_property_get_dnssec_mode, 0, 0), |
| SD_BUS_PROPERTY("DNSSECStatistics", "(tttt)", bus_property_get_dnssec_statistics, 0, 0), |
| SD_BUS_PROPERTY("DNSSECSupported", "b", bus_property_get_dnssec_supported, 0, 0), |
| SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", bus_property_get_ntas, 0, 0), |
| SD_BUS_PROPERTY("DNSStubListener", "s", bus_property_get_dns_stub_listener_mode, offsetof(Manager, dns_stub_listener_mode), 0), |
| |
| SD_BUS_METHOD("ResolveHostname", "isit", "a(iiay)st", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ResolveAddress", "iiayt", "a(is)t", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ResolveRecord", "isqqt", "a(iqqay)t", bus_method_resolve_record, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ResolveService", "isssit", "a(qqqsa(iiay)s)aayssst", bus_method_resolve_service, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ResetStatistics", NULL, NULL, bus_method_reset_statistics, 0), |
| SD_BUS_METHOD("FlushCaches", NULL, NULL, bus_method_flush_caches, 0), |
| SD_BUS_METHOD("ResetServerFeatures", NULL, NULL, bus_method_reset_server_features, 0), |
| SD_BUS_METHOD("GetLink", "i", "o", bus_method_get_link, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("SetLinkDNS", "ia(iay)", NULL, bus_method_set_link_dns_servers, 0), |
| SD_BUS_METHOD("SetLinkDomains", "ia(sb)", NULL, bus_method_set_link_domains, 0), |
| SD_BUS_METHOD("SetLinkDefaultRoute", "ib", NULL, bus_method_set_link_default_route, 0), |
| SD_BUS_METHOD("SetLinkLLMNR", "is", NULL, bus_method_set_link_llmnr, 0), |
| SD_BUS_METHOD("SetLinkMulticastDNS", "is", NULL, bus_method_set_link_mdns, 0), |
| SD_BUS_METHOD("SetLinkDNSOverTLS", "is", NULL, bus_method_set_link_dns_over_tls, 0), |
| SD_BUS_METHOD("SetLinkDNSSEC", "is", NULL, bus_method_set_link_dnssec, 0), |
| SD_BUS_METHOD("SetLinkDNSSECNegativeTrustAnchors", "ias", NULL, bus_method_set_link_dnssec_negative_trust_anchors, 0), |
| SD_BUS_METHOD("RevertLink", "i", NULL, bus_method_revert_link, 0), |
| |
| SD_BUS_METHOD("RegisterService", "sssqqqaa{say}", "o", bus_method_register_service, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("UnregisterService", "o", NULL, bus_method_unregister_service, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_VTABLE_END, |
| }; |
| |
| static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { |
| Manager *m = userdata; |
| int b, r; |
| |
| assert(message); |
| assert(m); |
| |
| r = sd_bus_message_read(message, "b", &b); |
| if (r < 0) { |
| log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); |
| return 0; |
| } |
| |
| if (b) |
| return 0; |
| |
| log_debug("Coming back from suspend, verifying all RRs..."); |
| |
| manager_verify_all(m); |
| return 0; |
| } |
| |
| int manager_connect_bus(Manager *m) { |
| int r; |
| |
| assert(m); |
| |
| if (m->bus) |
| return 0; |
| |
| r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-resolve"); |
| if (r < 0) |
| return log_error_errno(r, "Failed to connect to system bus: %m"); |
| |
| r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1.Manager", resolve_vtable, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register object: %m"); |
| |
| r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/resolve1/link", "org.freedesktop.resolve1.Link", link_vtable, link_object_find, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register link objects: %m"); |
| |
| r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/resolve1/link", link_node_enumerator, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register link enumerator: %m"); |
| |
| r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", "org.freedesktop.resolve1.DnssdService", dnssd_vtable, dnssd_object_find, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register dnssd objects: %m"); |
| |
| r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", dnssd_node_enumerator, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register dnssd enumerator: %m"); |
| |
| r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.resolve1", 0, NULL, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request name: %m"); |
| |
| r = sd_bus_attach_event(m->bus, m->event, 0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to attach bus to event loop: %m"); |
| |
| r = sd_bus_match_signal_async( |
| m->bus, |
| NULL, |
| "org.freedesktop.login1", |
| "/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| "PrepareForSleep", |
| match_prepare_for_sleep, |
| NULL, |
| m); |
| if (r < 0) |
| log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m"); |
| |
| return 0; |
| } |