new file mode 100644

@@ -0,0 +1,28 @@

+package opts

+

+import (

+	"net"

+)

+

+type IpOpt struct {

+	*net.IP

+}

+

+func NewIpOpt(ref *net.IP, defaultVal string) *IpOpt {

+	o := &IpOpt{

+		IP: ref,

+	}

+	o.Set(defaultVal)

+	return o

+}

+

+func (o *IpOpt) Set(val string) error {

+	// FIXME: return a parse error if the value is not a valid IP?

+	// We are not changing this now to preserve behavior while refactoring.

+	(*o.IP) = net.ParseIP(val)

+	return nil

+}

+

+func (o *IpOpt) String() string {

+	return (*o.IP).String()

+}