Package org.onosproject.segmentrouting

Class ArpHandler

java.lang.Object

org.onosproject.segmentrouting.SegmentRoutingNeighbourHandler

org.onosproject.segmentrouting.ArpHandler

public class ArpHandler
extends SegmentRoutingNeighbourHandler

Handler of ARP packets that responses or forwards ARP packets that are sent to the controller.

Field Summary

Fields inherited from class org.onosproject.segmentrouting.SegmentRoutingNeighbourHandler

config, srManager

Constructor Summary

Constructors

Constructor	Description
ArpHandler(SegmentRoutingManager srManager)	Creates an ArpHandler object.

Method Summary

Modifier and Type	Method	Description
void	processPacketIn(org.onosproject.net.neighbour.NeighbourMessageContext pkt, org.onosproject.net.host.HostService hostService)	Processes incoming ARP packets.
void	sendArpRequest(org.onosproject.net.DeviceId deviceId, org.onlab.packet.IpAddress targetAddress, org.onosproject.net.ConnectPoint inPort)	Sends an APR request for the target IP address to all ports except in-port.

Methods inherited from class org.onosproject.segmentrouting.SegmentRoutingNeighbourHandler

flood, flood, getSenderInfo, respondToUnknownHosts, sendResponse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ArpHandler

public ArpHandler(SegmentRoutingManager srManager)

Creates an ArpHandler object.

Parameters:

srManager - SegmentRoutingManager object

Method Detail

processPacketIn

public void processPacketIn(org.onosproject.net.neighbour.NeighbourMessageContext pkt,
                            org.onosproject.net.host.HostService hostService)

Processes incoming ARP packets. If it is an ARP request to router itself or known hosts, then it sends ARP response. If it is an ARP request to unknown hosts in its own subnet, then it flood the ARP request to the ports. If it is an ARP response, then set a flow rule for the host and forward any IP packets to the host in the packet buffer to the host.

Note: We handles all ARP packet in, even for those ARP packets between hosts in the same subnet. For an ARP packet with broadcast destination MAC, some switches pipelines will send it to the controller due to table miss, other switches will flood the packets directly in the data plane without packet in. We can deal with both cases.

Parameters:

pkt - incoming ARP packet and context information

hostService - the host service

sendArpRequest

public void sendArpRequest(org.onosproject.net.DeviceId deviceId,
                           org.onlab.packet.IpAddress targetAddress,
                           org.onosproject.net.ConnectPoint inPort)

Sends an APR request for the target IP address to all ports except in-port.

Parameters:

deviceId - Switch device ID

targetAddress - target IP address for ARP

inPort - in-port