Struct Server 

struct Server {
    leases: [Lease; 8],
}

The server’s fixed lease pool.

Fields

leases: [Lease; 8]

Implementations

impl Server

const fn new() -> Self

Empty pool — every slot free, nothing expired yet.

fn pool_addr(slot: usize) -> Option<Ipv4Address>

Address owned by a pool slot.

fn slot_of_addr(ip: Ipv4Address) -> Option<usize>

Slot that owns ip, when the address is inside the pool.

fn active_slot(&self, mac: [u8; 6], now: Instant) -> Option<usize>

Slot actively (unexpired) leased to mac.

fn refresh(&mut self, slot: usize, now: Instant)

Extend a lease for another full duration.

fn assign(&mut self, mac: [u8; 6], now: Instant) -> Option<Ipv4Address>

Assign a pool address to mac (reusing its existing lease, else claiming a free or expired slot).

fn bind_addr(&mut self, mac: [u8; 6], ip: Ipv4Address, now: Instant) -> bool

Bind mac to a specific pool address (the REQUEST path).

fn free(&mut self, slot: usize)

Free a slot (RELEASE / DECLINE).

fn handle(&mut self, msg: &ClientMsg, now: Instant) -> Option<Action>

Decide the reply for one client message; None means no answer.

fn handle_request(&mut self, msg: &ClientMsg, now: Instant) -> Option<Action>

REQUEST: confirm a lease (ACK) or send the client back to DISCOVER (NAK).