func (this *Option121ClasslessStaticRoute) Construct(routes []Route) error {
buf := make([]byte, 256)
idx := 0
for _, route := range routes {
if 5+significantBytes(route.Mask)+idx >= len(buf) {
return dherrors.Opt121TooLong
}
buf[idx] = route.Mask
util.ConvertUint32To4byte(route.Dest, buf[idx+1:idx+5])
util.ConvertUint32To4byte(route.Gw, buf[idx+1+significantBytes(route.Mask):idx+5+significantBytes(route.Mask)])
idx += 5 + significantBytes(route.Mask)
}
buf = buf[:idx]
this.rawOpt.Construct(this.GetNum(), byte(len(buf)))
copy(this.rawOpt.GetValue(), buf)
return nil
}
func (typ *TypeListUint32) Construct(optNum byte, value []uint32) error {
if len(value) == 0 {
return errors.New(fmt.Sprintf("Option %d has invalid null length", optNum))
}
typ.rawOpt.Construct(optNum, byte(len(value)*LEN_OPT_U_INT32))
optData := typ.rawOpt.GetValue()
for i, v := range value {
util.ConvertUint32To4byte(v, optData[i*LEN_OPT_U_INT32:(i+1)*LEN_OPT_U_INT32])
}
return nil
}
func (dp DhcpPacket) SetGiAddr(ip uint32) {
util.ConvertUint32To4byte(ip, dp.Raw[24:28])
}
func (dp DhcpPacket) SetNextServerIp(ip uint32) {
util.ConvertUint32To4byte(ip, dp.Raw[20:24])
}
func (dp DhcpPacket) SetYourIp(ip uint32) {
util.ConvertUint32To4byte(ip, dp.Raw[16:20])
}
func (dp DhcpPacket) SetClientIp(ip uint32) {
util.ConvertUint32To4byte(ip, dp.Raw[12:16])
}
func (tuint32 *TypeUint32) Construct(numOpt byte, number uint32) {
tuint32.rawOpt.Construct(numOpt, LEN_OPT_U_INT32)
util.ConvertUint32To4byte(number, tuint32.GetValue())
}