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package dhcpv6
// This module defines the OptIAAddress structure.
// https://www.ietf.org/rfc/rfc3633.txt
import (
"encoding/binary"
"fmt"
"net"
)
type OptIAAddress struct {
ipv6Addr [16]byte
preferredLifetime uint32
validLifetime uint32
options []byte
}
func (op *OptIAAddress) Code() OptionCode {
return OPTION_IAADDR
}
func (op *OptIAAddress) ToBytes() []byte {
buf := make([]byte, 28)
binary.BigEndian.PutUint16(buf[0:2], uint16(OPTION_IAADDR))
binary.BigEndian.PutUint16(buf[2:4], uint16(op.Length()))
copy(buf[4:20], op.ipv6Addr[:])
binary.BigEndian.PutUint32(buf[20:24], op.preferredLifetime)
binary.BigEndian.PutUint32(buf[24:28], op.validLifetime)
buf = append(buf, op.options...)
return buf
}
func (op *OptIAAddress) IPv6Addr() []byte {
return op.ipv6Addr[:]
}
func (op *OptIAAddress) SetIPv6Addr(addr [16]byte) {
op.ipv6Addr = addr
}
func (op *OptIAAddress) PreferredLifetime() uint32 {
return op.preferredLifetime
}
func (op *OptIAAddress) SetPreferredLifetime(pl uint32) {
op.preferredLifetime = pl
}
func (op *OptIAAddress) ValidLifetime() uint32 {
return op.validLifetime
}
func (op *OptIAAddress) SetValidLifetime(vl uint32) {
op.validLifetime = vl
}
func (op *OptIAAddress) Options() []byte {
return op.options
}
func (op *OptIAAddress) SetOptions(options []byte) {
op.options = options
}
func (op *OptIAAddress) Length() int {
return 24 + len(op.options)
}
func (op *OptIAAddress) String() string {
return fmt.Sprintf("OptIAAddress{ipv6addr=%v, preferredlifetime=%v, validlifetime=%v, options=%v}",
net.IP(op.ipv6Addr[:]), op.preferredLifetime, op.validLifetime, op.options)
}
// build 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) {
opt := OptIAAddress{}
if len(data) < 24 {
return nil, fmt.Errorf("Invalid IA Address data length. Expected at least 24 bytes, got %v", len(data))
}
copy(opt.ipv6Addr[:], data[:16])
opt.preferredLifetime = binary.BigEndian.Uint32(data[16:20])
opt.validLifetime = binary.BigEndian.Uint32(data[20:24])
copy(opt.options, data[24:])
return &opt, nil
}
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