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package dhcpv6
import (
"fmt"
"net"
"time"
"github.com/u-root/u-root/pkg/uio"
)
// AddressOptions are options valid for the IAAddress option field.
//
// RFC 8415 Appendix C lists only the Status Code option as valid.
type AddressOptions struct {
Options
}
// Status returns the status code associated with this option.
func (ao AddressOptions) Status() *OptStatusCode {
opt := ao.Options.GetOne(OptionStatusCode)
if opt == nil {
return nil
}
sc, ok := opt.(*OptStatusCode)
if !ok {
return nil
}
return sc
}
// OptIAAddress represents an OptionIAAddr.
//
// This module defines the OptIAAddress structure.
// https://www.ietf.org/rfc/rfc3633.txt
type OptIAAddress struct {
IPv6Addr net.IP
PreferredLifetime time.Duration
ValidLifetime time.Duration
Options AddressOptions
}
// Code returns the option's code
func (op *OptIAAddress) Code() OptionCode {
return OptionIAAddr
}
// ToBytes serializes the option and returns it as a sequence of bytes
func (op *OptIAAddress) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
write16(buf, op.IPv6Addr)
t1 := Duration{op.PreferredLifetime}
t1.Marshal(buf)
t2 := Duration{op.ValidLifetime}
t2.Marshal(buf)
buf.WriteBytes(op.Options.ToBytes())
return buf.Data()
}
func (op *OptIAAddress) String() string {
return fmt.Sprintf("IAAddress: IP=%v PreferredLifetime=%v ValidLifetime=%v Options=%v",
op.IPv6Addr, op.PreferredLifetime, op.ValidLifetime, op.Options)
}
// ParseOptIAAddress builds an OptIAAddress structure from a sequence
// of bytes. The input data does not include option code and length
// bytes.
func ParseOptIAAddress(data []byte) (*OptIAAddress, error) {
var opt OptIAAddress
buf := uio.NewBigEndianBuffer(data)
opt.IPv6Addr = net.IP(buf.CopyN(net.IPv6len))
var t1, t2 Duration
t1.Unmarshal(buf)
t2.Unmarshal(buf)
opt.PreferredLifetime = t1.Duration
opt.ValidLifetime = t2.Duration
if err := opt.Options.FromBytes(buf.ReadAll()); err != nil {
return nil, err
}
return &opt, buf.FinError()
}
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