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udp_windows.go
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udp_windows.go
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// +build windows
package dns
import "net"
type SessionUDPFactory interface {
// SetSocketOptions sets the required UDP socket options on 'conn'.
// Must be called before 'conn' is passed to ReadRequest()
SetSocketOptions(conn *net.UDPConn) error
// InitPool initializes a pool of buffers to be used with SessionUDP.
// Must be called before calling ReadRequest()
InitPool(msgSize int)
// ReadRequest reads a single request from 'conn'.
// Returns the message buffer and the SessionUDP instance
// that is used to send the response.
ReadRequest(conn *net.UDPConn) ([]byte, SessionUDP, error)
// ReadRequestConn reads a single request from 'conn'.
// Returns the message buffer and the source address
ReadRequestConn(conn net.PacketConn) ([]byte, net.Addr, error)
}
type sessionUDPFactory struct{}
var defaultSessionUDPFactory = &sessionUDPFactory{}
// SetSocketOptions sets the required UDP socket options on 'conn'.
func (s *sessionUDPFactory) SetSocketOptions(conn *net.UDPConn) error {
return nil
}
// InitPool initializes a pool of buffers to be used with SessionUDP.
func (f *sessionUDPFactory) InitPool(msgSize int) {}
// ReadRequest reads a single request from 'conn' and returns the request context
func (f *sessionUDPFactory) ReadRequest(conn *net.UDPConn) ([]byte, SessionUDP, error) {
return nil, SessionUDP{}, nil
}
func (f *sessionUDPFactory) ReadRequestConn(conn net.PacketConn) ([]byte, net.Addr, error) {
return nil, nil, nil
}
// SessionUDP holds the remote address
type SessionUDP struct {
raddr *net.UDPAddr
}
func (s *SessionUDP) Discard() {}
// RemoteAddr returns the remote network address.
func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr }
func (s *SessionUDP) LocalAddr() net.Addr { return &net.UDPAddr{} }
func (s *SessionUDP) WriteResponse(b []byte) (int, error) { return 0, nil }
// ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
// net.UDPAddr.
// TODO(fastest963): Once go1.10 is released, use ReadMsgUDP.
func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) {
n, raddr, err := conn.ReadFrom(b)
if err != nil {
return n, nil, err
}
return n, &SessionUDP{raddr.(*net.UDPAddr)}, err
}
// WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr.
// TODO(fastest963): Once go1.10 is released, use WriteMsgUDP.
func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) {
return conn.WriteTo(b, session.raddr)
}
// TODO(fastest963): Once go1.10 is released and we can use *MsgUDP methods
// use the standard method in udp.go for these.
func setUDPSocketOptions(*net.UDPConn) error { return nil }
func parseDstFromOOB([]byte, net.IP) net.IP { return nil }