diff --git a/VERSION b/VERSION
index f979adec..bf057dbf 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v0.9.0
+v0.10.0
diff --git a/ofctrl/ofAction.go b/ofctrl/ofAction.go
index a075b4bc..b81bc3b7 100644
--- a/ofctrl/ofAction.go
+++ b/ofctrl/ofAction.go
@@ -657,21 +657,29 @@ type NXController struct {
 	UserData     []byte
 	MeterID      uint32
 	Pause        bool
+	MaxLen       *uint16
 }
 
 func (a *NXController) GetActionMessage() openflow15.Action {
+	// By default, do not buffer, i.e., send the full packet to the controller.
+	// Note that OVS does not support buffering and always sends the full
+	// packet; it will ignore other values of max_len.
+	maxLen := uint16(openflow15.OFPCML_NO_BUFFER)
+	if a.MaxLen != nil {
+		maxLen = *a.MaxLen
+	}
 	if a.Version2 {
 		action := openflow15.NewNXActionController2()
 		action.AddControllerID(a.ControllerID)
 		action.AddReason(a.Reason)
 		action.AddUserdata(a.UserData)
-		action.AddMaxLen(128)
+		action.AddMaxLen(maxLen)
 		action.AddMeterID(a.MeterID)
 		action.AddPause(a.Pause)
 		return action
 	}
 	action := openflow15.NewNXActionController(a.ControllerID)
-	action.MaxLen = 128
+	action.MaxLen = maxLen
 	action.Reason = a.Reason
 	return action
 }
diff --git a/ofctrl/ofpacket_test.go b/ofctrl/ofpacket_test.go
index 311e236d..7e5832c3 100644
--- a/ofctrl/ofpacket_test.go
+++ b/ofctrl/ofpacket_test.go
@@ -148,7 +148,7 @@ func TestNxOutputAndSendController(t *testing.T) {
 	flow1.Send(openflow15.FC_ADD)
 	verifyFlowInstallAndDelete(t, flow1, NewEmptyElem(), brName, table0.TableId,
 		"priority=100,ip,dl_src=11:22:33:44:55:66",
-		fmt.Sprintf("output:NXM_NX_REG0[],controller(max_len=128,id=%d)", app.Switch.ctrlID))
+		fmt.Sprintf("output:NXM_NX_REG0[],controller(id=%d)", app.Switch.ctrlID))
 }
 
 func testPacketInOut(t *testing.T, ofApp *packetApp, ipv6 bool, reason uint8, controllerV2 bool, dstPort uint16, userData []byte, pause bool) {