github.com/EagleQL/Xray-core@v1.4.3/app/dns/nameserver.go (about)

     1  package dns
     2  
     3  import (
     4  	"context"
     5  
     6  	"github.com/xtls/xray-core/common/net"
     7  	"github.com/xtls/xray-core/features/dns"
     8  	"github.com/xtls/xray-core/features/dns/localdns"
     9  )
    10  
    11  // Client is the interface for DNS client.
    12  type Client interface {
    13  	// Name of the Client.
    14  	Name() string
    15  
    16  	// QueryIP sends IP queries to its configured server.
    17  	QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, error)
    18  }
    19  
    20  type LocalNameServer struct {
    21  	client *localdns.Client
    22  }
    23  
    24  func (s *LocalNameServer) QueryIP(_ context.Context, domain string, option dns.IPOption) ([]net.IP, error) {
    25  	if option.IPv4Enable || option.IPv6Enable {
    26  		return s.client.LookupIP(domain, option)
    27  	}
    28  
    29  	return nil, newError("neither IPv4 nor IPv6 is enabled")
    30  }
    31  
    32  func (s *LocalNameServer) Name() string {
    33  	return "localhost"
    34  }
    35  
    36  func NewLocalNameServer() *LocalNameServer {
    37  	newError("DNS: created localhost client").AtInfo().WriteToLog()
    38  	return &LocalNameServer{
    39  		client: localdns.New(),
    40  	}
    41  }