find_lease_by_hw_addr
hw_lease = find_lease_by_hw_addr(packet->raw->chaddr,
struct lease *find_lease_by_hw_addr(unsigned char *, int);
struct lease *head = find_lease_by_hw_addr(lease->hardware_addr.haddr,
struct lease *head = find_lease_by_hw_addr(lease->hardware_addr.haddr,
lease = find_lease_by_hw_addr(