private Ethernet buildArpRequest(
IpAddress targetIp, IpAddress sourceIp, MacAddress sourceMac, VlanId vlan) {
ARP arp = new ARP();
arp.setHardwareType(ARP.HW_TYPE_ETHERNET)
.setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH)
.setProtocolType(ARP.PROTO_TYPE_IP)
.setProtocolAddressLength((byte) IpAddress.INET_BYTE_LENGTH)
.setOpCode(ARP.OP_REQUEST);
arp.setSenderHardwareAddress(sourceMac.toBytes())
.setSenderProtocolAddress(sourceIp.toOctets())
.setTargetHardwareAddress(ZERO_MAC_ADDRESS)
.setTargetProtocolAddress(targetIp.toOctets());
Ethernet ethernet = new Ethernet();
ethernet
.setEtherType(Ethernet.TYPE_ARP)
.setDestinationMACAddress(MacAddress.BROADCAST)
.setSourceMACAddress(sourceMac)
.setPayload(arp);
if (!vlan.equals(VlanId.NONE)) {
ethernet.setVlanID(vlan.toShort());
}
ethernet.setPad(true);
return ethernet;
}
/**
* Sends an APR request for the target IP address to all ports except in-port.
*
* @param deviceId Switch device ID
* @param targetAddress target IP address for ARP
* @param inPort in-port
*/
public void sendArpRequest(DeviceId deviceId, IpAddress targetAddress, ConnectPoint inPort) {
byte[] senderMacAddress;
byte[] senderIpAddress;
try {
senderMacAddress = config.getDeviceMac(deviceId).toBytes();
senderIpAddress = config.getRouterIp(deviceId).toOctets();
} catch (DeviceConfigNotFoundException e) {
log.warn(e.getMessage() + " Aborting sendArpRequest.");
return;
}
ARP arpRequest = new ARP();
arpRequest
.setHardwareType(ARP.HW_TYPE_ETHERNET)
.setProtocolType(ARP.PROTO_TYPE_IP)
.setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH)
.setProtocolAddressLength((byte) Ip4Address.BYTE_LENGTH)
.setOpCode(ARP.OP_REQUEST)
.setSenderHardwareAddress(senderMacAddress)
.setTargetHardwareAddress(MacAddress.ZERO.toBytes())
.setSenderProtocolAddress(senderIpAddress)
.setTargetProtocolAddress(targetAddress.toOctets());
Ethernet eth = new Ethernet();
eth.setDestinationMACAddress(MacAddress.BROADCAST.toBytes())
.setSourceMACAddress(senderMacAddress)
.setEtherType(Ethernet.TYPE_ARP)
.setPayload(arpRequest);
removeVlanAndFlood(eth, inPort);
}
private Ethernet buildNdpRequest(
IpAddress targetIp, IpAddress sourceIp, MacAddress sourceMac, VlanId vlan) {
// Create the Ethernet packet
Ethernet ethernet = new Ethernet();
ethernet
.setEtherType(Ethernet.TYPE_IPV6)
.setDestinationMACAddress(MacAddress.BROADCAST)
.setSourceMACAddress(sourceMac);
if (!vlan.equals(VlanId.NONE)) {
ethernet.setVlanID(vlan.toShort());
}
//
// Create the IPv6 packet
//
// TODO: The destination IP address should be the
// solicited-node multicast address
IPv6 ipv6 = new IPv6();
ipv6.setSourceAddress(sourceIp.toOctets());
ipv6.setDestinationAddress(targetIp.toOctets());
ipv6.setHopLimit((byte) 255);
// Create the ICMPv6 packet
ICMP6 icmp6 = new ICMP6();
icmp6.setIcmpType(ICMP6.NEIGHBOR_SOLICITATION);
icmp6.setIcmpCode((byte) 0);
// Create the Neighbor Solication packet
NeighborSolicitation ns = new NeighborSolicitation();
ns.setTargetAddress(targetIp.toOctets());
ns.addOption(NeighborDiscoveryOptions.TYPE_SOURCE_LL_ADDRESS, sourceMac.toBytes());
icmp6.setPayload(ns);
ipv6.setPayload(icmp6);
ethernet.setPayload(ipv6);
return ethernet;
}
@Override
public byte[] getBytes() throws HeaderException {
try {
byte[] data = new byte[LENGTH];
System.arraycopy(exporterIPv4Address.toOctets(), 0, data, 0, 4);
System.arraycopy(exporterIPv6Address.toOctets(), 0, data, 4, 16);
System.arraycopy(Longs.toByteArray(flowStartMilliseconds), 0, data, 20, 8);
System.arraycopy(Longs.toByteArray(flowEndMilliseconds), 0, data, 28, 8);
System.arraycopy(Longs.toByteArray(octetDeltaCount), 0, data, 36, 8);
System.arraycopy(Longs.toByteArray(packetDeltaCount), 0, data, 44, 8);
System.arraycopy(Ints.toByteArray(ingressInterface), 0, data, 52, 4);
System.arraycopy(Ints.toByteArray(egressInterface), 0, data, 56, 4);
System.arraycopy(sourceMacAddress.toBytes(), 0, data, 60, 6);
System.arraycopy(destinationMacAddress.toBytes(), 0, data, 66, 6);
System.arraycopy(Shorts.toByteArray(ethernetType), 0, data, 72, 2);
System.arraycopy(Shorts.toByteArray(vlanId), 0, data, 74, 2);
return data;
} catch (Exception e) {
throw new HeaderException("Error while generating the bytes: " + e.getMessage());
}
}
