udp_no_control.go raw

   1  //go:build windows || darwin
   2  // +build windows darwin
   3  
   4  // TODO(tmthrgd): Remove this Windows-specific code if go.dev/issue/7175 and
   5  //   go.dev/issue/7174 are ever fixed.
   6  
   7  // NOTICE(stek29): darwin supports PKTINFO in sendmsg, but it unbinds sockets, see https://github.com/miekg/dns/issues/724
   8  
   9  package dns
  10  
  11  import "net"
  12  
  13  // SessionUDP holds the remote address
  14  type SessionUDP struct {
  15  	raddr *net.UDPAddr
  16  }
  17  
  18  // RemoteAddr returns the remote network address.
  19  func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr }
  20  
  21  // ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
  22  // net.UDPAddr.
  23  func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) {
  24  	n, raddr, err := conn.ReadFrom(b)
  25  	if err != nil {
  26  		return n, nil, err
  27  	}
  28  	return n, &SessionUDP{raddr.(*net.UDPAddr)}, err
  29  }
  30  
  31  // WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr.
  32  func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) {
  33  	return conn.WriteTo(b, session.raddr)
  34  }
  35  
  36  func setUDPSocketOptions(*net.UDPConn) error { return nil }
  37  func parseDstFromOOB([]byte, net.IP) net.IP  { return nil }
  38