func sendRemovingAllFlows(f openflow.Factory, w trans.Writer) error {
match, err := f.NewMatch() // Wildcard
if err != nil {
return err
}
msg, err := f.NewFlowMod(openflow.FlowDelete)
if err != nil {
return err
}
// Wildcard
msg.SetTableID(0xFF)
msg.SetFlowMatch(match)
return w.Write(msg)
}
func setARPSender(f openflow.Factory, w trans.Writer) error {
match, err := f.NewMatch()
if err != nil {
return err
}
match.SetEtherType(0x0806) // ARP
outPort := openflow.NewOutPort()
outPort.SetController()
action, err := f.NewAction()
if err != nil {
return err
}
action.SetOutPort(outPort)
inst, err := f.NewInstruction()
if err != nil {
return err
}
inst.ApplyAction(action)
flow, err := f.NewFlowMod(openflow.FlowAdd)
if err != nil {
return err
}
// Permanent flow
flow.SetIdleTimeout(0)
flow.SetHardTimeout(0)
flow.SetPriority(100)
flow.SetFlowMatch(match)
flow.SetFlowInstruction(inst)
if err := w.Write(flow); err != nil {
return err
}
return sendBarrierRequest(f, w)
}
func (r *of13Session) setTableMiss(f openflow.Factory, w trans.Writer, tableID uint8, inst openflow.Instruction) error {
match, err := f.NewMatch() // Wildcard
if err != nil {
return err
}
msg, err := f.NewFlowMod(openflow.FlowAdd)
if err != nil {
return err
}
// We use MSB to represent whether the flow is table miss or not
msg.SetCookie(0x1 << 63)
msg.SetTableID(tableID)
// Permanent flow entry
msg.SetIdleTimeout(0)
msg.SetHardTimeout(0)
// Table-miss entry should have zero priority
msg.SetPriority(0)
msg.SetFlowMatch(match)
msg.SetFlowInstruction(inst)
return w.Write(msg)
}