Added structure, parsing and convenience fuctions for OptInformationRefreshTime (32) https://tools.ietf.org/html/rfc8415#section-21.23

Signed-off-by: Tom McPhail <tom.mcphail@icloud.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/dhcpv6/option_informationrefreshtime.go b/dhcpv6/option_informationrefreshtime.go
new file mode 100644
index 0000000..942d5c7
--- /dev/null
+++ b/dhcpv6/option_informationrefreshtime.go
@@ -0,0 +1,48 @@
+package dhcpv6
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/u-root/u-root/pkg/uio"
+)
+
+// OptInformationRefreshTime implements OptionInformationRefreshTime option.
+// https://tools.ietf.org/html/rfc8415#section-21.23
+func OptInformationRefreshTime(irt time.Duration) *optInformationRefreshTime {
+	return &optInformationRefreshTime{irt}
+}
+
+// optInformationRefreshTime represents an OptionInformationRefreshTime.
+type optInformationRefreshTime struct {
+	InformationRefreshtime time.Duration
+}
+
+// Code returns the option's code
+func (op *optInformationRefreshTime) Code() OptionCode {
+	return OptionInformationRefreshTime
+}
+
+// ToBytes serializes the option and returns it as a sequence of bytes
+func (op *optInformationRefreshTime) ToBytes() []byte {
+	buf := uio.NewBigEndianBuffer(nil)
+	irt := Duration{op.InformationRefreshtime}
+	irt.Marshal(buf)
+	return buf.Data()
+}
+
+func (op *optInformationRefreshTime) String() string {
+	return fmt.Sprintf("InformationRefreshTime: %v", op.InformationRefreshtime)
+}
+
+// parseOptInformationRefreshTime builds an optInformationRefreshTime structure from a sequence
+// of bytes. The input data does not include option code and length bytes.
+func parseOptInformationRefreshTime(data []byte) (*optInformationRefreshTime, error) {
+	var opt optInformationRefreshTime
+	buf := uio.NewBigEndianBuffer(data)
+
+	var irt Duration
+	irt.Unmarshal(buf)
+	opt.InformationRefreshtime = irt.Duration
+	return &opt, buf.FinError()
+}