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package dhcpv6
import (
"fmt"
"github.com/u-root/u-root/pkg/uio"
)
// OptRemoteId implemens the Remote ID option.
//
// https://www.ietf.org/rfc/rfc4649.txt
type OptRemoteId struct {
enterpriseNumber uint32
remoteId []byte
}
func (op *OptRemoteId) Code() OptionCode {
return OptionRemoteID
}
// ToBytes serializes this option to a byte stream.
func (op *OptRemoteId) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
buf.Write16(uint16(OptionRemoteID))
buf.Write16(uint16(op.Length()))
buf.Write32(uint32(op.enterpriseNumber))
buf.WriteBytes(op.remoteId)
return buf.Data()
}
func (op *OptRemoteId) EnterpriseNumber() uint32 {
return op.enterpriseNumber
}
func (op *OptRemoteId) SetEnterpriseNumber(enterpriseNumber uint32) {
op.enterpriseNumber = enterpriseNumber
}
func (op *OptRemoteId) RemoteID() []byte {
return op.remoteId
}
func (op *OptRemoteId) SetRemoteID(remoteId []byte) {
op.remoteId = append([]byte(nil), remoteId...)
}
func (op *OptRemoteId) Length() int {
return 4 + len(op.remoteId)
}
func (op *OptRemoteId) String() string {
return fmt.Sprintf("OptRemoteId{enterprisenum=%v, remoteid=%v}",
op.enterpriseNumber, op.remoteId,
)
}
// ParseOptRemoteId builds an OptRemoteId structure from a sequence of bytes.
// The input data does not include option code and length bytes.
func ParseOptRemoteId(data []byte) (*OptRemoteId, error) {
var opt OptRemoteId
buf := uio.NewBigEndianBuffer(data)
opt.enterpriseNumber = buf.Read32()
opt.remoteId = buf.ReadAll()
return &opt, buf.FinError()
}
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