// sendGARP sends GARP for the specified IP, MAC
func (self *Vxlan) sendGARP(ip net.IP, mac net.HardwareAddr, vni uint64) error {
// NOTE: Enable this when EVPN support is added.
if !VXLAN_GARP_SUPPORTED {
return nil
}
pktOut := BuildGarpPkt(ip, mac, 0)
tunnelIdField := openflow13.NewTunnelIdField(vni)
setTunnelAction := openflow13.NewActionSetField(*tunnelIdField)
// Add set tunnel action to the instruction
pktOut.AddAction(setTunnelAction)
self.agent.vtepTableMutex.RLock()
for _, vtepPort := range self.agent.vtepTable {
log.Debugf("Sending to Vtep port: %+v", *vtepPort)
pktOut.AddAction(openflow13.NewActionOutput(*vtepPort))
}
self.agent.vtepTableMutex.RUnlock()
// Send it out
self.ofSwitch.Send(pktOut)
self.agent.incrStats("GarpPktSent")
return nil
}
// Install a group entry in OF switch
func (self *Flood) install() error {
groupMod := openflow13.NewGroupMod()
groupMod.GroupId = self.GroupId
// Change the OP to modify if it was already installed
if self.isInstalled {
groupMod.Command = openflow13.OFPGC_MODIFY
}
// OF type for flood list
groupMod.Type = openflow13.OFPGT_ALL
// Loop thru all output ports and add it to group bucket
for _, output := range self.FloodList {
// Get the output action from output entry
act := output.outPort.GetOutAction()
if act != nil {
// Create a new bucket for each port
bkt := openflow13.NewBucket()
// Set tunnel Id if required
if output.isTunnel {
tunnelField := openflow13.NewTunnelIdField(output.tunnelId)
setTunnel := openflow13.NewActionSetField(*tunnelField)
bkt.AddAction(setTunnel)
}
// Always remove vlan tag
popVlan := openflow13.NewActionPopVlan()
bkt.AddAction(popVlan)
// Add the output action to the bucket
bkt.AddAction(act)
// Add the bucket to group
groupMod.AddBucket(*bkt)
}
}
log.Infof("Installing Group entry: %+v", groupMod)
// Send it to the switch
self.Switch.Send(groupMod)
// Mark it as installed
self.isInstalled = true
return nil
}
// Install all flow actions
func (self *Flow) installFlowActions(flowMod *openflow13.FlowMod,
instr openflow13.Instruction) error {
var actInstr openflow13.Instruction
var addActn bool = false
// Create a apply_action instruction to be used if its not already created
switch instr.(type) {
case *openflow13.InstrActions:
actInstr = instr
default:
actInstr = openflow13.NewInstrApplyActions()
}
// Loop thru all actions
for _, flowAction := range self.flowActions {
switch flowAction.actionType {
case "setVlan":
// Push Vlan Tag action
pushVlanAction := openflow13.NewActionPushVlan(0x8100)
// Set Outer vlan tag field
vlanField := openflow13.NewVlanIdField(flowAction.vlanId)
setVlanAction := openflow13.NewActionSetField(*vlanField)
// Prepend push vlan & setvlan actions to existing instruction
actInstr.AddAction(setVlanAction, true)
actInstr.AddAction(pushVlanAction, true)
addActn = true
log.Debugf("flow install. Added pushvlan action: %+v, setVlan actions: %+v",
pushVlanAction, setVlanAction)
case "popVlan":
// Create pop vln action
popVlan := openflow13.NewActionPopVlan()
// Add it to instruction
actInstr.AddAction(popVlan, true)
addActn = true
log.Debugf("flow install. Added popVlan action: %+v", popVlan)
case "setMacDa":
// Set Outer MacDA field
macDaField := openflow13.NewEthDstField(flowAction.macAddr, nil)
setMacDaAction := openflow13.NewActionSetField(*macDaField)
// Add set macDa action to the instruction
actInstr.AddAction(setMacDaAction, true)
addActn = true
log.Debugf("flow install. Added setMacDa action: %+v", setMacDaAction)
case "setMacSa":
// Set Outer MacSA field
macSaField := openflow13.NewEthSrcField(flowAction.macAddr, nil)
setMacSaAction := openflow13.NewActionSetField(*macSaField)
// Add set macDa action to the instruction
actInstr.AddAction(setMacSaAction, true)
addActn = true
log.Debugf("flow install. Added setMacSa Action: %+v", setMacSaAction)
case "setTunnelId":
// Set tunnelId field
tunnelIdField := openflow13.NewTunnelIdField(flowAction.tunnelId)
setTunnelAction := openflow13.NewActionSetField(*tunnelIdField)
// Add set tunnel action to the instruction
actInstr.AddAction(setTunnelAction, true)
addActn = true
log.Debugf("flow install. Added setTunnelId Action: %+v", setTunnelAction)
case "setMetadata":
// Set Metadata instruction
metadataInstr := openflow13.NewInstrWriteMetadata(flowAction.metadata, flowAction.metadataMask)
// Add the instruction to flowmod
flowMod.AddInstruction(metadataInstr)
default:
log.Fatalf("Unknown action type %s", flowAction.actionType)
}
}
// Add the instruction to flow if its not already added
if (addActn) && (actInstr != instr) {
// Add the instrction to flowmod
flowMod.AddInstruction(actInstr)
}
return nil
}
/*
* Process incoming ARP packets
* ARP request handling in various scenarios:
* Src and Dest EP known:
* - Proxy ARP if Dest EP is present locally on the host
* Src EP known, Dest EP not known:
* - ARP Request to a router/VM scenario. Reinject ARP request to VTEPs
* Src EP not known, Dest EP known:
* - Proxy ARP if Dest EP is present locally on the host
* Src and Dest EP not known:
* - Ignore processing the request
*/
func (self *Vxlan) processArp(pkt protocol.Ethernet, inPort uint32) {
switch t := pkt.Data.(type) {
case *protocol.ARP:
log.Debugf("Processing ARP packet on port %d: %+v", inPort, *t)
var arpIn protocol.ARP = *t
switch arpIn.Operation {
case protocol.Type_Request:
// If it's a GARP packet, ignore processing
if arpIn.IPSrc.String() == arpIn.IPDst.String() {
log.Debugf("Ignoring GARP packet")
return
}
if self.agent.portVlanMap[inPort] == nil {
log.Debugf("Invalid port vlan mapping. Ignoring arp packet")
return
}
vlan := self.agent.portVlanMap[inPort]
// Lookup the Source and Dest IP in the endpoint table
srcEp := self.agent.getEndpointByIpVlan(arpIn.IPSrc, *vlan)
dstEp := self.agent.getEndpointByIpVlan(arpIn.IPDst, *vlan)
// No information about the src or dest EP. Ignore processing.
if srcEp == nil && dstEp == nil {
log.Debugf("No information on source/destination. Ignoring ARP request.")
return
}
// If we know the dstEp to be present locally, send the Proxy ARP response
if dstEp != nil {
// Container to Container communication. Send proxy ARP response.
// Unknown node to Container communication
// -> Send proxy ARP response only if Endpoint is local.
// -> This is to avoid sending ARP responses from ofnet agent on multiple hosts
if srcEp != nil ||
(srcEp == nil && dstEp.OriginatorIp.String() == self.agent.localIp.String()) {
// Form an ARP response
arpPkt, _ := protocol.NewARP(protocol.Type_Reply)
arpPkt.HWSrc, _ = net.ParseMAC(dstEp.MacAddrStr)
arpPkt.IPSrc = arpIn.IPDst
arpPkt.HWDst = arpIn.HWSrc
arpPkt.IPDst = arpIn.IPSrc
log.Debugf("Sending Proxy ARP response: %+v", arpPkt)
// Build the ethernet packet
ethPkt := protocol.NewEthernet()
ethPkt.VLANID.VID = pkt.VLANID.VID
ethPkt.HWDst = arpPkt.HWDst
ethPkt.HWSrc = arpPkt.HWSrc
ethPkt.Ethertype = 0x0806
ethPkt.Data = arpPkt
log.Debugf("Sending Proxy ARP response Ethernet: %+v", ethPkt)
// Construct Packet out
pktOut := openflow13.NewPacketOut()
pktOut.Data = ethPkt
pktOut.AddAction(openflow13.NewActionOutput(inPort))
// Send the packet out
self.ofSwitch.Send(pktOut)
return
}
}
if srcEp != nil && dstEp == nil {
// If the ARP request was received from VTEP port
// Ignore processing the packet
for _, vtepPort := range self.agent.vtepTable {
if *vtepPort == inPort {
log.Debugf("Received packet from VTEP port. Ignore processing")
return
}
}
// ARP request from local container to unknown IP
// Reinject ARP to VTEP ports
ethPkt := protocol.NewEthernet()
ethPkt.HWDst = pkt.HWDst
ethPkt.HWSrc = pkt.HWSrc
ethPkt.Ethertype = 0x0806
ethPkt.Data = &arpIn
log.Infof("Received ARP request for unknown IP: %v. "+
"Reinjecting ARP request Ethernet to VTEP ports: %+v", arpIn.IPDst, ethPkt)
// Packet out
pktOut := openflow13.NewPacketOut()
pktOut.InPort = inPort
pktOut.Data = ethPkt
tunnelIdField := openflow13.NewTunnelIdField(uint64(srcEp.Vni))
setTunnelAction := openflow13.NewActionSetField(*tunnelIdField)
// Add set tunnel action to the instruction
pktOut.AddAction(setTunnelAction)
for _, vtepPort := range self.agent.vtepTable {
log.Debugf("Sending to VTEP port: %+v", *vtepPort)
pktOut.AddAction(openflow13.NewActionOutput(*vtepPort))
}
// Send the packet out
self.ofSwitch.Send(pktOut)
}
case protocol.Type_Reply:
log.Debugf("Received ARP response packet: %+v from port %d", arpIn, inPort)
ethPkt := protocol.NewEthernet()
ethPkt.VLANID = pkt.VLANID
ethPkt.HWDst = pkt.HWDst
ethPkt.HWSrc = pkt.HWSrc
ethPkt.Ethertype = 0x0806
ethPkt.Data = &arpIn
log.Debugf("Sending ARP response Ethernet: %+v", ethPkt)
// Packet out
pktOut := openflow13.NewPacketOut()
pktOut.InPort = inPort
pktOut.Data = ethPkt
pktOut.AddAction(openflow13.NewActionOutput(openflow13.P_NORMAL))
log.Debugf("Reinjecting ARP reply packet: %+v", pktOut)
// Send it out
self.ofSwitch.Send(pktOut)
}
}
}
// Install all flow actions
func (self *Flow) installFlowActions(flowMod *openflow13.FlowMod,
instr openflow13.Instruction) error {
var actInstr openflow13.Instruction
var addActn bool = false
// Create a apply_action instruction to be used if its not already created
switch instr.(type) {
case *openflow13.InstrActions:
actInstr = instr
default:
actInstr = openflow13.NewInstrApplyActions()
}
// Loop thru all actions
for _, flowAction := range self.flowActions {
switch flowAction.actionType {
case "pushMpls": //SRTE
// Push mpls Tag action
pushMplsAction := openflow13.NewActionPushMpls(0x8847)
// Set Outer mpls label field
mplsLabelField := openflow13.NewMplsLabelField(flowAction.mplsLabel)
setMplsAction := openflow13.NewActionSetField(*mplsLabelField)
// Prepend push mpls & setlabel actions to existing instruction
actInstr.AddAction(setMplsAction, true)
actInstr.AddAction(pushMplsAction, true)
addActn = true
log.Debugf("flow install. Added mpls action: %+v, setMpls actions: %+v",
pushMplsAction, setMplsAction)
case "popVlanPushMpls": //SRTE
// Push mpls Tag action
pushMplsAction := openflow13.NewActionPushMpls(0x8847)
// Set Outer mpls label field
mplsLabelField := openflow13.NewMplsLabelField(flowAction.mplsLabel)
setMplsAction := openflow13.NewActionSetField(*mplsLabelField)
// Prepend push mpls & setlabel actions to existing instruction
actInstr.AddAction(setMplsAction, true)
actInstr.AddAction(pushMplsAction, true)
// Create pop vlan action
popVlan := openflow13.NewActionPopVlan()
// Add it to instruction
actInstr.AddAction(popVlan, true)
addActn = true
log.Debugf("flow install. Added pop vlan action: %+v, and Added mpls action: %+v, setMpls actions: %+v",
popVlan, pushMplsAction, setMplsAction)
case "popMplsPushVlan": //SRTE
// Push Vlan Tag action
pushVlanAction := openflow13.NewActionPushVlan(0x8100)
// Set Outer vlan tag field
vlanField := openflow13.NewVlanIdField(flowAction.vlanId, nil)
setVlanAction := openflow13.NewActionSetField(*vlanField)
// Prepend push vlan & setvlan actions to existing instruction
actInstr.AddAction(setVlanAction, true)
actInstr.AddAction(pushVlanAction, true)
//popmpls action
popMplsAction := openflow13.NewActionPopMpls(0x0800)
actInstr.AddAction(popMplsAction, true)
addActn = true
log.Debugf("flow install. Added pop mpls action: %+v, and Added push vlan action: %+v, setVlan actions: %+v",
popMplsAction, setVlanAction, vlanField)
case "swapMpls": //SRTE - Test this
// Set Outer mpls label field
mplsLabelField := openflow13.NewMplsLabelField(flowAction.mplsLabel)
setMplsAction := openflow13.NewActionSetField(*mplsLabelField)
// Prepend push mpls & setlabel actions to existing instruction
actInstr.AddAction(setMplsAction, true)
addActn = true
log.Debugf("flow install. Added swap mpls - setMpls actions: %+v", setMplsAction)
case "popMpls": //SRTE
// Pop mpls Tag action
popMplsAction := openflow13.NewActionPopMpls(0x0800)
actInstr.AddAction(popMplsAction, true)
addActn = true
log.Debugf("flow install. Pop mpls action: %+v",
popMplsAction)
case "setVlan":
// Push Vlan Tag action
pushVlanAction := openflow13.NewActionPushVlan(0x8100)
// Set Outer vlan tag field
vlanField := openflow13.NewVlanIdField(flowAction.vlanId, nil)
setVlanAction := openflow13.NewActionSetField(*vlanField)
// Prepend push vlan & setvlan actions to existing instruction
actInstr.AddAction(setVlanAction, true)
actInstr.AddAction(pushVlanAction, true)
addActn = true
log.Debugf("flow install. Added pushvlan action: %+v, setVlan actions: %+v",
pushVlanAction, setVlanAction)
case "popVlan":
// Create pop vln action
popVlan := openflow13.NewActionPopVlan()
// Add it to instruction
actInstr.AddAction(popVlan, true)
addActn = true
log.Debugf("flow install. Added popVlan action: %+v", popVlan)
case "setMacDa":
// Set Outer MacDA field
macDaField := openflow13.NewEthDstField(flowAction.macAddr, nil)
setMacDaAction := openflow13.NewActionSetField(*macDaField)
// Add set macDa action to the instruction
actInstr.AddAction(setMacDaAction, true)
addActn = true
log.Debugf("flow install. Added setMacDa action: %+v", setMacDaAction)
case "setMacSa":
// Set Outer MacSA field
macSaField := openflow13.NewEthSrcField(flowAction.macAddr, nil)
setMacSaAction := openflow13.NewActionSetField(*macSaField)
// Add set macDa action to the instruction
actInstr.AddAction(setMacSaAction, true)
addActn = true
log.Debugf("flow install. Added setMacSa Action: %+v", setMacSaAction)
case "setTunnelId":
// Set tunnelId field
tunnelIdField := openflow13.NewTunnelIdField(flowAction.tunnelId)
setTunnelAction := openflow13.NewActionSetField(*tunnelIdField)
// Add set tunnel action to the instruction
actInstr.AddAction(setTunnelAction, true)
addActn = true
log.Debugf("flow install. Added setTunnelId Action: %+v", setTunnelAction)
case "setMetadata":
// Set Metadata instruction
metadataInstr := openflow13.NewInstrWriteMetadata(flowAction.metadata, flowAction.metadataMask)
// Add the instruction to flowmod
flowMod.AddInstruction(metadataInstr)
case "setIPSa":
// Set IP src
ipSaField := openflow13.NewIpv4SrcField(flowAction.ipAddr, nil)
setIPSaAction := openflow13.NewActionSetField(*ipSaField)
// Add set action to the instruction
actInstr.AddAction(setIPSaAction, true)
addActn = true
log.Debugf("flow install. Added setIPSa Action: %+v", setIPSaAction)
case "setIPDa":
// Set IP dst
ipDaField := openflow13.NewIpv4DstField(flowAction.ipAddr, nil)
setIPDaAction := openflow13.NewActionSetField(*ipDaField)
// Add set action to the instruction
actInstr.AddAction(setIPDaAction, true)
addActn = true
log.Debugf("flow install. Added setIPDa Action: %+v", setIPDaAction)
case "setTCPSrc":
// Set TCP src
tcpSrcField := openflow13.NewTcpSrcField(flowAction.l4Port)
setTCPSrcAction := openflow13.NewActionSetField(*tcpSrcField)
// Add set action to the instruction
actInstr.AddAction(setTCPSrcAction, true)
addActn = true
log.Debugf("flow install. Added setTCPSrc Action: %+v", setTCPSrcAction)
case "setTCPDst":
// Set TCP dst
tcpDstField := openflow13.NewTcpDstField(flowAction.l4Port)
setTCPDstAction := openflow13.NewActionSetField(*tcpDstField)
// Add set action to the instruction
actInstr.AddAction(setTCPDstAction, true)
addActn = true
log.Debugf("flow install. Added setTCPDst Action: %+v", setTCPDstAction)
case "setUDPSrc":
// Set UDP src
udpSrcField := openflow13.NewUdpSrcField(flowAction.l4Port)
setUDPSrcAction := openflow13.NewActionSetField(*udpSrcField)
// Add set action to the instruction
actInstr.AddAction(setUDPSrcAction, true)
addActn = true
log.Debugf("flow install. Added setUDPSrc Action: %+v", setUDPSrcAction)
case "setUDPDst":
// Set UDP dst
udpDstField := openflow13.NewUdpDstField(flowAction.l4Port)
setUDPDstAction := openflow13.NewActionSetField(*udpDstField)
// Add set action to the instruction
actInstr.AddAction(setUDPDstAction, true)
addActn = true
log.Debugf("flow install. Added setUDPDst Action: %+v", setUDPDstAction)
default:
log.Fatalf("Unknown action type %s", flowAction.actionType)
}
}
// Add the instruction to flow if its not already added
if (addActn) && (actInstr != instr) {
// Add the instrction to flowmod
flowMod.AddInstruction(actInstr)
}
return nil
}