/**
* Sends an ARP or Neighbor Discovery Protocol request for the given IP address.
*
* @param targetIp IP address to send the request for
*/
private void sendArpNdpRequest(IpAddress targetIp) {
Interface intf = interfaceService.getMatchingInterface(targetIp);
if (intf == null) {
return;
}
for (InterfaceIpAddress ia : intf.ipAddresses()) {
if (ia.subnetAddress().contains(targetIp)) {
sendArpNdpProbe(intf.connectPoint(), targetIp, ia.ipAddress(), intf.mac(), intf.vlan());
}
}
}
private void transformAndSend(IPv4 ipv4, Interface egressInterface, MacAddress macAddress) {
Ethernet eth = new Ethernet();
eth.setDestinationMACAddress(macAddress);
eth.setSourceMACAddress(egressInterface.mac());
eth.setEtherType(EthType.EtherType.IPV4.ethType().toShort());
eth.setPayload(ipv4);
if (!egressInterface.vlan().equals(VlanId.NONE)) {
eth.setVlanID(egressInterface.vlan().toShort());
}
ipv4.setTtl((byte) (ipv4.getTtl() - 1));
ipv4.setChecksum((short) 0);
send(eth, egressInterface.connectPoint());
}