| package dhcp4 |
| |
| type OptionCode byte |
| |
| type Option struct { |
| Code OptionCode |
| Value []byte |
| } |
| |
| // Map of DHCP options |
| type Options map[OptionCode][]byte |
| |
| // SelectOrderOrAll has same functionality as SelectOrder, except if the order |
| // param is nil, whereby all options are added (in arbitrary order). |
| func (o Options) SelectOrderOrAll(order []byte) []Option { |
| if order == nil { |
| opts := make([]Option, 0, len(o)) |
| for i, v := range o { |
| opts = append(opts, Option{Code: i, Value: v}) |
| } |
| return opts |
| } |
| return o.SelectOrder(order) |
| } |
| |
| // SelectOrder returns a slice of options ordered and selected by a byte array |
| // usually defined by OptionParameterRequestList. This result is expected to be |
| // used in ReplyPacket()'s []Option parameter. |
| func (o Options) SelectOrder(order []byte) []Option { |
| opts := make([]Option, 0, len(order)) |
| for _, v := range order { |
| if data, ok := o[OptionCode(v)]; ok { |
| opts = append(opts, Option{Code: OptionCode(v), Value: data}) |
| } |
| } |
| return opts |
| } |
| |
| type OpCode byte |
| type MessageType byte // Option 53 |
