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package dhcpv6
import (
"fmt"
"github.com/insomniacslk/dhcp/rfc1035label"
"github.com/u-root/uio/uio"
)
// OptFQDN implements OptionFQDN option.
//
// https://tools.ietf.org/html/rfc4704
type OptFQDN struct {
Flags uint8
DomainName *rfc1035label.Labels
}
// Code returns the option code.
func (op *OptFQDN) Code() OptionCode {
return OptionFQDN
}
// ToBytes serializes the option and returns it as a sequence of bytes
func (op *OptFQDN) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
buf.Write8(op.Flags)
buf.WriteBytes(op.DomainName.ToBytes())
return buf.Data()
}
func (op *OptFQDN) String() string {
return fmt.Sprintf("%s: {Flags=%d DomainName=%s}", op.Code(), op.Flags, op.DomainName)
}
// FromBytes deserializes from bytes to build a OptFQDN structure.
func (op *OptFQDN) FromBytes(data []byte) error {
var err error
buf := uio.NewBigEndianBuffer(data)
op.Flags = buf.Read8()
op.DomainName, err = rfc1035label.FromBytes(buf.ReadAll())
if err != nil {
return err
}
return buf.FinError()
}
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