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package dhcp6opts
import (
"io"
"github.com/mdlayher/dhcp6/internal/buffer"
)
// VendorClass is used by a client to identify the vendor that
// manufactured the hardware on which the client is running. The
// information contained in the data area of this option is contained in
// one or more opaque fields that identify details of the hardware
// configuration.
type VendorClass struct {
// EnterpriseNumber specifies an IANA-assigned vendor Private Enterprise
// Number.
EnterpriseNumber uint32
// The vendor-class-data is composed of a series of separate items, each
// of which describes some characteristic of the client's hardware
// configuration. Examples of vendor-class-data instances might include
// the version of the operating system the client is running or the
// amount of memory installed on the client.
VendorClassData Data
}
// MarshalBinary allocates a byte slice containing the data from a VendorClass.
func (vc *VendorClass) MarshalBinary() ([]byte, error) {
b := buffer.New(nil)
b.Write32(vc.EnterpriseNumber)
vc.VendorClassData.Marshal(b)
return b.Data(), nil
}
// UnmarshalBinary unmarshals a raw byte slice into a VendorClass.
//
// If the byte slice is less than 4 bytes in length, or if VendorClassData is
// malformed, io.ErrUnexpectedEOF is returned.
func (vc *VendorClass) UnmarshalBinary(p []byte) error {
b := buffer.New(p)
if b.Len() < 4 {
return io.ErrUnexpectedEOF
}
vc.EnterpriseNumber = b.Read32()
return vc.VendorClassData.Unmarshal(b)
}
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