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package dhcpv6
// This module defines the OptDomainSearchList structure.
// https://www.ietf.org/rfc/rfc3646.txt
import (
"encoding/binary"
"fmt"
"github.com/insomniacslk/dhcp/rfc1035label"
)
// OptDomainSearchList list implements a OptionDomainSearchList option
type OptDomainSearchList struct {
DomainSearchList []string
}
func (op *OptDomainSearchList) Code() OptionCode {
return OptionDomainSearchList
}
func (op *OptDomainSearchList) ToBytes() []byte {
buf := make([]byte, 4)
binary.BigEndian.PutUint16(buf[0:2], uint16(OptionDomainSearchList))
binary.BigEndian.PutUint16(buf[2:4], uint16(op.Length()))
buf = append(buf, rfc1035label.LabelsToBytes(op.DomainSearchList)...)
return buf
}
func (op *OptDomainSearchList) Length() int {
var length int
for _, label := range op.DomainSearchList {
length += len(label) + 2 // add the first and the last length bytes
}
return length
}
func (op *OptDomainSearchList) String() string {
return fmt.Sprintf("OptDomainSearchList{searchlist=%v}", op.DomainSearchList)
}
// build an OptDomainSearchList structure from a sequence of bytes.
// The input data does not include option code and length bytes.
func ParseOptDomainSearchList(data []byte) (*OptDomainSearchList, error) {
opt := OptDomainSearchList{}
var err error
opt.DomainSearchList, err = rfc1035label.LabelsFromBytes(data)
if err != nil {
return nil, err
}
return &opt, nil
}
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