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package dhcpv6
import (
"fmt"
"github.com/u-root/u-root/pkg/uio"
)
// OptClientId represents a Client ID option
//
// This module defines the OptClientId and DUID structures.
// https://www.ietf.org/rfc/rfc3315.txt
type OptClientId struct {
Cid Duid
}
func (op *OptClientId) Code() OptionCode {
return OptionClientID
}
// ToBytes marshals the Client ID option as defined by RFC 3315, Section 22.2.
func (op *OptClientId) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
buf.Write16(uint16(OptionClientID))
buf.Write16(uint16(op.Length()))
buf.WriteBytes(op.Cid.ToBytes())
return buf.Data()
}
func (op *OptClientId) Length() int {
return op.Cid.Length()
}
func (op *OptClientId) String() string {
return fmt.Sprintf("OptClientId{cid=%v}", op.Cid.String())
}
// ParseOptClientId builds an OptClientId structure from a sequence
// of bytes. The input data does not include option code and length
// bytes.
func ParseOptClientId(data []byte) (*OptClientId, error) {
var opt OptClientId
cid, err := DuidFromBytes(data)
if err != nil {
return nil, err
}
opt.Cid = *cid
return &opt, nil
}
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