- if ((address >> 31) == 0x0)
- /* class A, leading bits: 0 */
- lease->subnet_mask = htobe32(0xff000000);
- else if ((address >> 30) == 0x2)
- /* class B, leading bits 10 */
- lease->subnet_mask = htobe32(0xffff0000);
- else if ((address >> 29) == 0x6)
- /* class C, leading bits 110 */
- lease->subnet_mask = htobe32(0xffffff00);
- else
- /* class D or E, no default mask. give up */
- return -ERANGE;