dhcp4d: log in leases callback

cmd/dhcp4d/dhcp4d.go

@@ -46,7 +46,8 @@ func logic() error {
 	if err := loadLeases(handler, "/perm/dhcp4d/leases.json"); err != nil {
 		return err
 	}
-	handler.Leases = func(leases []*dhcp4d.Lease) {
+	handler.Leases = func(leases []*dhcp4d.Lease, latest *dhcp4d.Lease) {
+		log.Printf("DHCPACK %+v", latest)
 		b, err := json.Marshal(leases)
 		if err != nil {
 			errs <- err

internal/dhcp4d/dhcp4d.go

@@ -43,7 +43,7 @@ type Handler struct {
 	timeNow func() time.Time
 
 	// Leases is called whenever a new lease is handed out
-	Leases func([]*Lease)
+	Leases func([]*Lease, *Lease)
 }
 
 func NewHandler(dir string, iface *net.Interface, conn net.PacketConn) (*Handler, error) {
@@ -250,13 +250,12 @@ func (h *Handler) serveDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options d
 
 		h.leasesIP[leaseNum] = lease
 		h.leasesHW[lease.HardwareAddr] = lease
-		log.Printf("handed out lease %+v (ip bytes: %#v)", lease, lease.Addr)
 		if h.Leases != nil {
 			var leases []*Lease
 			for _, l := range h.leasesIP {
 				leases = append(leases, l)
 			}
-			h.Leases(leases)
+			h.Leases(leases, lease)
 		}
 		return dhcp4.ReplyPacket(p, dhcp4.ACK, h.serverIP, reqIP, h.leasePeriod,
 			h.options.SelectOrderOrAll(options[dhcp4.OptionParameterRequestList]))

internal/dhcp4d/dhcp4d_test.go

@@ -87,7 +87,7 @@ func TestLease(t *testing.T) {
 		hostname     = "xps"
 	)
 	leasedCalled := false
-	handler.Leases = func(leases []*Lease) {
+	handler.Leases = func(leases []*Lease, latest *Lease) {
 		if got, want := len(leases), 1; got != want {
 			t.Fatalf("unexpected number of leases: got %d, want %d", got, want)
 		}