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package dhcpv6
import (
"fmt"
"github.com/u-root/u-root/pkg/uio"
)
// OptIANA implements the identity association for non-temporary addresses
// option.
//
// This module defines the OptIANA structure.
// https://www.ietf.org/rfc/rfc3633.txt
type OptIANA struct {
IaId [4]byte
T1 uint32
T2 uint32
Options Options
}
func (op *OptIANA) Code() OptionCode {
return OptionIANA
}
// ToBytes serializes IANA to DHCPv6 bytes.
func (op *OptIANA) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
buf.WriteBytes(op.IaId[:])
buf.Write32(op.T1)
buf.Write32(op.T2)
buf.WriteBytes(op.Options.ToBytes())
return buf.Data()
}
func (op *OptIANA) String() string {
return fmt.Sprintf("OptIANA{IAID=%v, t1=%v, t2=%v, options=%v}",
op.IaId, op.T1, op.T2, op.Options)
}
// AddOption adds an option at the end of the IA_NA options
func (op *OptIANA) AddOption(opt Option) {
op.Options.Add(opt)
}
// GetOneOption will get an option of the give type from the Options field, if
// it is present. It will return `nil` otherwise
func (op *OptIANA) GetOneOption(code OptionCode) Option {
return op.Options.GetOne(code)
}
// DelOption will remove all the options that match a Option code.
func (op *OptIANA) DelOption(code OptionCode) {
op.Options.Del(code)
}
// ParseOptIANA builds an OptIANA structure from a sequence of bytes. The
// input data does not include option code and length bytes.
func ParseOptIANA(data []byte) (*OptIANA, error) {
var opt OptIANA
buf := uio.NewBigEndianBuffer(data)
buf.ReadBytes(opt.IaId[:])
opt.T1 = buf.Read32()
opt.T2 = buf.Read32()
if err := opt.Options.FromBytes(buf.ReadAll()); err != nil {
return nil, err
}
return &opt, buf.FinError()
}
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