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package dhcpv6
// This module defines the OptIAForPrefixDelegation structure.
// https://www.ietf.org/rfc/rfc3633.txt
import (
"encoding/binary"
"fmt"
"log"
)
type OptIAForPrefixDelegation struct {
iaId [4]byte
t1 uint32
t2 uint32
options []Option
}
// Code returns the option code
func (op *OptIAForPrefixDelegation) Code() OptionCode {
return OptionIAPD
}
// ToBytes serializes the option and returns it as a sequence of bytes
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)
for _, opt := range op.options {
buf = append(buf, opt.ToBytes()...)
}
return buf
}
// IAID returns the identity association identifier for this option
func (op *OptIAForPrefixDelegation) IAID() []byte {
return op.iaId[:]
}
// SetIAID sets the identity association identifier for this option
func (op *OptIAForPrefixDelegation) SetIAID(iaId [4]byte) {
op.iaId = iaId
}
// T1 returns the T1 timer for this option
func (op *OptIAForPrefixDelegation) T1() uint32 {
return op.t1
}
// SetT1 sets the T1 timer for this option
func (op *OptIAForPrefixDelegation) SetT1(t1 uint32) {
op.t1 = t1
}
// T2 returns the T2 timer for this option
func (op *OptIAForPrefixDelegation) T2() uint32 {
return op.t2
}
// SetT2 sets the T2 timer for this option
func (op *OptIAForPrefixDelegation) SetT2(t2 uint32) {
op.t2 = t2
}
// Options serializes the options and returns them as a sequence of bytes
func (op *OptIAForPrefixDelegation) Options() []byte {
log.Printf("Warning: OptIAForPrefixDelegation.Options() is deprecated and will be changed to a public field")
buf := op.ToBytes()
return buf[16:]
}
// SetOptions sets the options as a sequence of bytes
func (op *OptIAForPrefixDelegation) SetOptions(options []byte) error {
var err error
op.options, err = OptionsFromBytes(options)
if err != nil {
return err
}
return nil
}
// Length returns the option length
func (op *OptIAForPrefixDelegation) Length() int {
l := 12
for _, opt := range op.options {
l += 4 + opt.Length()
}
return l
}
// String returns a string representation of the OptIAForPrefixDelegation data
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)
}
// GetOneOption will get an option of the give type from the Options field, if
// it is present. It will return `nil` otherwise
func (op *OptIAForPrefixDelegation) GetOneOption(code OptionCode) Option {
return getOption(op.options, code)
}
// DelOption will remove all the options that match a Option code.
func (op *OptIAForPrefixDelegation) DelOption(code OptionCode) {
op.options = delOption(op.options, code)
}
// 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) {
var err 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, err = OptionsFromBytes(data[12:])
if err != nil {
return nil, err
}
return &opt, nil
}
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