return 0;
}
+
+int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
+ uint32_t address;
+
+ assert(lease);
+ assert(lease->address != INADDR_ANY);
+
+ address = be32toh(lease->address);
+
+ /* fall back to the default subnet masks based on address class */
+
+ 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;
+
+ return 0;
+}