void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state) {
        DnsQueryCandidate *c;
        DnsZoneItem *z;
        DnsTransaction *d;
        const char *st;
        char key_str[DNS_RESOURCE_KEY_STRING_MAX];

        assert(t);
        assert(!DNS_TRANSACTION_IS_LIVE(state));

        if (state == DNS_TRANSACTION_DNSSEC_FAILED) {
                dns_resource_key_to_string(t->key, key_str, sizeof key_str);

                log_struct(LOG_NOTICE,
                           "MESSAGE_ID=" SD_MESSAGE_DNSSEC_FAILURE_STR,
                           LOG_MESSAGE("DNSSEC validation failed for question %s: %s", key_str, dnssec_result_to_string(t->answer_dnssec_result)),
                           "DNS_TRANSACTION=%" PRIu16, t->id,
                           "DNS_QUESTION=%s", key_str,
                           "DNSSEC_RESULT=%s", dnssec_result_to_string(t->answer_dnssec_result),
                           "DNS_SERVER=%s", dns_server_string(t->server),
                           "DNS_SERVER_FEATURE_LEVEL=%s", dns_server_feature_level_to_string(t->server->possible_feature_level));
        }

        /* Note that this call might invalidate the query. Callers
         * should hence not attempt to access the query or transaction
         * after calling this function. */

        if (state == DNS_TRANSACTION_ERRNO)
                st = errno_to_name(t->answer_errno);
        else
                st = dns_transaction_state_to_string(state);

        log_debug("Transaction %" PRIu16 " for <%s> on scope %s on %s/%s now complete with <%s> from %s (%s).",
                  t->id,
                  dns_resource_key_to_string(t->key, key_str, sizeof key_str),
                  dns_protocol_to_string(t->scope->protocol),
                  t->scope->link ? t->scope->link->name : "*",
                  af_to_name_short(t->scope->family),
                  st,
                  t->answer_source < 0 ? "none" : dns_transaction_source_to_string(t->answer_source),
                  t->answer_authenticated ? "authenticated" : "unsigned");

        t->state = state;

        dns_transaction_close_connection(t);
        dns_transaction_stop_timeout(t);

        /* Notify all queries that are interested, but make sure the
         * transaction isn't freed while we are still looking at it */
        t->block_gc++;

        SET_FOREACH_MOVE(c, t->notify_query_candidates_done, t->notify_query_candidates)
                dns_query_candidate_notify(c);
        SWAP_TWO(t->notify_query_candidates, t->notify_query_candidates_done);

        SET_FOREACH_MOVE(z, t->notify_zone_items_done, t->notify_zone_items)
                dns_zone_item_notify(z);
        SWAP_TWO(t->notify_zone_items, t->notify_zone_items_done);
        if (t->probing && t->state == DNS_TRANSACTION_ATTEMPTS_MAX_REACHED)
                (void) dns_scope_announce(t->scope, false);

        SET_FOREACH_MOVE(d, t->notify_transactions_done, t->notify_transactions)
                dns_transaction_notify(d, t);
        SWAP_TWO(t->notify_transactions, t->notify_transactions_done);

        t->block_gc--;
        dns_transaction_gc(t);
}
void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state) {
        DnsQueryCandidate *c;
        DnsZoneItem *z;
        DnsTransaction *d;
        const char *st;
        char key_str[DNS_RESOURCE_KEY_STRING_MAX];

        assert(t);
        assert(!DNS_TRANSACTION_IS_LIVE(state));

        if (state == DNS_TRANSACTION_DNSSEC_FAILED) {
                dns_resource_key_to_string(t->key, key_str, sizeof key_str);

                log_struct(LOG_NOTICE,
                           "MESSAGE_ID=" SD_MESSAGE_DNSSEC_FAILURE_STR,
                           LOG_MESSAGE("DNSSEC validation failed for question %s: %s", key_str, dnssec_result_to_string(t->answer_dnssec_result)),
                           "DNS_TRANSACTION=%" PRIu16, t->id,
                           "DNS_QUESTION=%s", key_str,
                           "DNSSEC_RESULT=%s", dnssec_result_to_string(t->answer_dnssec_result),
                           "DNS_SERVER=%s", dns_server_string(t->server),
                           "DNS_SERVER_FEATURE_LEVEL=%s", dns_server_feature_level_to_string(t->server->possible_feature_level));
        }

         

        if (state == DNS_TRANSACTION_ERRNO)
                st = errno_to_name(t->answer_errno);
        else
                st = dns_transaction_state_to_string(state);

        log_debug("Transaction %" PRIu16 " for <%s> on scope %s on %s/%s now complete with <%s> from %s (%s).",
                  t->id,
                  dns_resource_key_to_string(t->key, key_str, sizeof key_str),
                  dns_protocol_to_string(t->scope->protocol),
                  t->scope->link ? t->scope->link->name : "*",
                  af_to_name_short(t->scope->family),
                  st,
                  t->answer_source < 0 ? "none" : dns_transaction_source_to_string(t->answer_source),
                  t->answer_authenticated ? "authenticated" : "unsigned");

        t->state = state;

        dns_transaction_close_connection(t);
        dns_transaction_stop_timeout(t);

         
        t->block_gc++;

        SET_FOREACH_MOVE(c, t->notify_query_candidates_done, t->notify_query_candidates)
                dns_query_candidate_notify(c);
        SWAP_TWO(t->notify_query_candidates, t->notify_query_candidates_done);

        SET_FOREACH_MOVE(z, t->notify_zone_items_done, t->notify_zone_items)
                dns_zone_item_notify(z);
        SWAP_TWO(t->notify_zone_items, t->notify_zone_items_done);
        if (t->probing && t->state == DNS_TRANSACTION_ATTEMPTS_MAX_REACHED)
                (void) dns_scope_announce(t->scope, false);

        SET_FOREACH_MOVE(d, t->notify_transactions_done, t->notify_transactions)
                dns_transaction_notify(d, t);
        SWAP_TWO(t->notify_transactions, t->notify_transactions_done);

        t->block_gc--;
        dns_transaction_gc(t);
}