// Delete the flow
func (self *Flow) Delete() error {
// Delete from ofswitch
if self.isInstalled {
// Create a flowmode entry
flowMod := openflow13.NewFlowMod()
flowMod.Command = openflow13.FC_DELETE
flowMod.TableId = self.Table.TableId
flowMod.Priority = self.Match.Priority
flowMod.Cookie = self.flowId
flowMod.CookieMask = 0xffffffffffffffff
flowMod.OutPort = openflow13.P_ANY
flowMod.OutGroup = openflow13.OFPG_ANY
log.Debugf("Sending DELETE flowmod: %+v", flowMod)
// Send the message
self.Table.Switch.Send(flowMod)
}
// Delete it from the table
flowKey := self.flowKey()
self.Table.DeleteFlow(flowKey)
return nil
}
// Install a flow entry
func (self *Flow) install() error {
// Create a flowmode entry
flowMod := openflow13.NewFlowMod()
flowMod.TableId = self.Table.TableId
flowMod.Priority = self.Match.Priority
flowMod.Cookie = self.flowId
// Add or modify
if !self.isInstalled {
flowMod.Command = openflow13.FC_ADD
} else {
flowMod.Command = openflow13.FC_MODIFY
}
// convert match fields to openflow 1.3 format
flowMod.Match = self.xlateMatch()
log.Debugf("flow install: Match: %+v", flowMod.Match)
// Based on the next elem, decide what to install
switch self.NextElem.Type() {
case "table":
// Get the instruction set from the element
instr := self.NextElem.GetFlowInstr()
// Check if there are any flow actions to perform
self.installFlowActions(flowMod, instr)
// Add the instruction to flowmod
flowMod.AddInstruction(instr)
log.Debugf("flow install: added goto table instr: %+v", instr)
case "flood":
fallthrough
case "output":
// Get the instruction set from the element
instr := self.NextElem.GetFlowInstr()
// Add the instruction to flowmod if its not nil
// a nil instruction means drop action
if instr != nil {
// Check if there are any flow actions to perform
self.installFlowActions(flowMod, instr)
flowMod.AddInstruction(instr)
log.Debugf("flow install: added output port instr: %+v", instr)
}
default:
log.Fatalf("Unknown Fgraph element type %s", self.NextElem.Type())
}
log.Debugf("Sending flowmod: %+v", flowMod)
// Send the message
self.Table.Switch.Send(flowMod)
// Mark it as installed
self.isInstalled = true
return nil
}