func sendLLDP(deviceID string, f openflow.Factory, w trans.Writer, p openflow.Port) error {
lldp, err := newLLDPEtherFrame(deviceID, p)
if err != nil {
return err
}
outPort := openflow.NewOutPort()
outPort.SetValue(p.Number())
// Packet out to the port
action, err := f.NewAction()
if err != nil {
return err
}
action.SetOutPort(outPort)
out, err := f.NewPacketOut()
if err != nil {
return err
}
// From controller
out.SetInPort(openflow.NewInPort())
out.SetAction(action)
out.SetData(lldp)
return w.Write(out)
}
func sendPortDescriptionRequest(f openflow.Factory, w trans.Writer) error {
msg, err := f.NewPortDescRequest()
if err != nil {
return err
}
return w.Write(msg)
}
func sendBarrierRequest(f openflow.Factory, w trans.Writer) error {
msg, err := f.NewBarrierRequest()
if err != nil {
return err
}
return w.Write(msg)
}
func sendHello(f openflow.Factory, w trans.Writer) error {
msg, err := f.NewHello()
if err != nil {
return err
}
return w.Write(msg)
}
func sendSetConfig(f openflow.Factory, w trans.Writer) error {
msg, err := f.NewSetConfig()
if err != nil {
return err
}
msg.SetFlags(openflow.FragNormal)
msg.SetMissSendLength(0xFFFF)
return w.Write(msg)
}
func sendQueueConfigRequest(f openflow.Factory, w trans.Writer, port uint32) error {
msg, err := f.NewQueueGetConfigRequest()
if err != nil {
return err
}
p := openflow.NewOutPort()
p.SetValue(port)
msg.SetPort(p)
return w.Write(msg)
}
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 (r *of13Session) setDefaultTableMiss(f openflow.Factory, w trans.Writer) error {
inst, err := f.NewInstruction()
if err != nil {
return err
}
// 0 -> Controller
outPort := openflow.NewOutPort()
outPort.SetController()
action, err := f.NewAction()
if err != nil {
return err
}
action.SetOutPort(outPort)
inst.ApplyAction(action)
if err := r.setTableMiss(f, w, 0, inst); err != nil {
return fmt.Errorf("failed to set table_miss flow entry: %v", err)
}
r.device.setFlowTableID(0)
return nil
}
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)
}
func (r *of13Session) setHP2920TableMiss(f openflow.Factory, w trans.Writer) error {
// Table-100 is a hardware table, and Table-200 is a software table
// that has very low performance.
inst, err := f.NewInstruction()
if err != nil {
return err
}
// 0 -> 100
inst.GotoTable(100)
if err := r.setTableMiss(f, w, 0, inst); err != nil {
return fmt.Errorf("failed to set table_miss flow entry: %v", err)
}
// 100 -> 200
inst.GotoTable(200)
if err := r.setTableMiss(f, w, 100, inst); err != nil {
return fmt.Errorf("failed to set table_miss flow entry: %v", err)
}
// 200 -> Controller
outPort := openflow.NewOutPort()
outPort.SetController()
action, err := f.NewAction()
if err != nil {
return err
}
action.SetOutPort(outPort)
inst.ApplyAction(action)
if err := r.setTableMiss(f, w, 200, inst); err != nil {
return fmt.Errorf("failed to set table_miss flow entry: %v", err)
}
r.device.setFlowTableID(200)
return nil
}
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)
}