private void handle(Ethernet eth) {
checkNotNull(eth);
if (!(eth.getEtherType() == EthType.EtherType.IPV4.ethType().toShort())) {
return;
}
IPv4 ipv4 = (IPv4) eth.getPayload().clone();
Ip4Address dstIp = Ip4Address.valueOf(ipv4.getDestinationAddress());
Interface egressInterface = interfaceService.getMatchingInterface(dstIp);
if (egressInterface == null) {
log.info("No egress interface found for {}", dstIp);
return;
}
Optional<Host> host =
hostService
.getHostsByIp(dstIp)
.stream()
.filter(h -> h.location().equals(egressInterface.connectPoint()))
.filter(h -> h.vlan().equals(egressInterface.vlan()))
.findAny();
if (host.isPresent()) {
transformAndSend(ipv4, egressInterface, host.get().mac());
} else {
hostService.startMonitoringIp(dstIp);
ipPacketCache
.asMap()
.compute(
dstIp,
(ip, queue) -> {
if (queue == null) {
queue = new ConcurrentLinkedQueue();
}
queue.add(ipv4);
return queue;
});
}
}
