package dns import ( "context" "strings" "time" "github.com/xtls/xray-core/common/errors" "github.com/xtls/xray-core/common/log" "github.com/xtls/xray-core/common/net" "github.com/xtls/xray-core/features/dns" "github.com/xtls/xray-core/features/dns/localdns" ) // LocalNameServer is an wrapper over local DNS feature. type LocalNameServer struct { client *localdns.Client } const errEmptyResponse = "No address associated with hostname" // QueryIP implements Server. func (s *LocalNameServer) QueryIP(ctx context.Context, domain string, _ net.IP, option dns.IPOption, _ bool) (ips []net.IP, err error) { start := time.Now() ips, err = s.client.LookupIP(domain, option) if err != nil && strings.HasSuffix(err.Error(), errEmptyResponse) { err = dns.ErrEmptyResponse } if len(ips) > 0 { errors.LogInfo(ctx, "Localhost got answer: ", domain, " -> ", ips) log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err}) } return } // Name implements Server. func (s *LocalNameServer) Name() string { return "localhost" } // NewLocalNameServer creates localdns server object for directly lookup in system DNS. func NewLocalNameServer() *LocalNameServer { errors.LogInfo(context.Background(), "DNS: created localhost client") return &LocalNameServer{ client: localdns.New(), } } // NewLocalDNSClient creates localdns client object for directly lookup in system DNS. func NewLocalDNSClient() *Client { return &Client{server: NewLocalNameServer()} }