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package dhcpv6
// This module defines the OptIAForPrefixDelegation structure.
// https://www.ietf.org/rfc/rfc3633.txt
import (
"encoding/binary"
"fmt"
)
type OptIAForPrefixDelegation struct {
iaId [4]byte
t1 uint32
t2 uint32
options []byte
}
func (op *OptIAForPrefixDelegation) Code() OptionCode {
return OptionIAPD
}
func (op *OptIAForPrefixDelegation) ToBytes() []byte {
buf := make([]byte, 16)
binary.BigEndian.PutUint16(buf[0:2], uint16(OptionIAPD))
binary.BigEndian.PutUint16(buf[2:4], uint16(op.Length()))
copy(buf[4:8], op.iaId[:])
binary.BigEndian.PutUint32(buf[8:12], op.t1)
binary.BigEndian.PutUint32(buf[12:16], op.t2)
buf = append(buf, op.options...)
return buf
}
func (op *OptIAForPrefixDelegation) IAID() []byte {
return op.iaId[:]
}
func (op *OptIAForPrefixDelegation) SetIAID(iaId [4]byte) {
op.iaId = iaId
}
func (op *OptIAForPrefixDelegation) T1() uint32 {
return op.t1
}
func (op *OptIAForPrefixDelegation) SetT1(t1 uint32) {
op.t1 = t1
}
func (op *OptIAForPrefixDelegation) T2() uint32 {
return op.t2
}
func (op *OptIAForPrefixDelegation) SetT2(t2 uint32) {
op.t2 = t2
}
func (op *OptIAForPrefixDelegation) Options() []byte {
return op.options
}
func (op *OptIAForPrefixDelegation) SetOptions(options []byte) {
op.options = options
}
func (op *OptIAForPrefixDelegation) Length() int {
return 12 + len(op.options)
}
func (op *OptIAForPrefixDelegation) String() string {
return fmt.Sprintf("OptIAForPrefixDelegation{IAID=%v, t1=%v, t2=%v, options=%v}",
op.iaId, op.t1, op.t2, op.options)
}
// build an OptIAForPrefixDelegation structure from a sequence of bytes.
// The input data does not include option code and length bytes.
func ParseOptIAForPrefixDelegation(data []byte) (*OptIAForPrefixDelegation, error) {
opt := OptIAForPrefixDelegation{}
if len(data) < 12 {
return nil, fmt.Errorf("Invalid IA for Prefix Delegation data length. Expected at least 12 bytes, got %v", len(data))
}
copy(opt.iaId[:], data[:4])
opt.t1 = binary.BigEndian.Uint32(data[4:8])
opt.t2 = binary.BigEndian.Uint32(data[8:12])
opt.options = append(opt.options, data[12:]...)
return &opt, nil
}
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