@Override
public void onPacketReceived(PacketReceived potentialArp) {
Arp arp = ArpResolverUtils.getArpFrom(potentialArp);
if (arp != null) {
if (arp.getOperation() != ArpOperation.REPLY.intValue()) {
LOG.trace("Packet is not ARP REPLY packet.");
return;
}
if (LOG.isTraceEnabled()) {
LOG.trace("ARP REPLY received - {}", ArpUtils.getArpToStringFormat(arp));
}
NodeKey nodeKey = potentialArp.getIngress().getValue().firstKeyOf(Node.class, NodeKey.class);
if (nodeKey == null) {
LOG.info("Unknown source node of ARP packet: {}", potentialArp);
return;
}
Ipv4Address gatewayIpAddress = ArpUtils.bytesToIp(arp.getSenderProtocolAddress());
MacAddress gatewayMacAddress = ArpUtils.bytesToMac(arp.getSenderHardwareAddress());
ArpResolverMetadata candidateGatewayIp = gatewayToArpMetadataMap.get(gatewayIpAddress);
if (candidateGatewayIp != null) {
LOG.debug(
"Resolved MAC for Gateway Ip {} is {}",
gatewayIpAddress.getValue(),
gatewayMacAddress.getValue());
candidateGatewayIp.setGatewayMacAddress(gatewayMacAddress);
resetFlowToRemove(gatewayIpAddress, candidateGatewayIp);
}
}
}
public void send(
int version,
int type_of_service,
int identification,
int DF,
int MF,
int fragment_offset,
int time_to_live,
int protocol,
int[] ipDestino,
int[] dado,
int[] tipoDeDadoMac) {
PacoteIp pacoteIP = new PacoteIp();
pacoteIP.setVersion(version);
pacoteIP.setType_of_service(type_of_service);
pacoteIP.setIdentification(identification);
pacoteIP.setDF(DF);
pacoteIP.setMF(MF);
pacoteIP.setFragment_offset(fragment_offset);
pacoteIP.setTime_to_live(time_to_live);
pacoteIP.setProtocol(protocol);
pacoteIP.setIpDestino(ipDestino);
pacoteIP.setIpOrigem(Constantes.ipOrigem);
pacoteIP.setDado(dado);
if (!ce.estaTransmitindo()) {
int[] endDestinoMac;
if ((endDestinoMac = pegaNaTabelaMacIp(ipDestino)) != null || true) {
endDestinoMac = Constantes.enderecoDeDestino;
// SE EXISTE NA TABELA ENVIA
ce.send(pacoteIP.toArray(), endDestinoMac, tipoDeDadoMac);
} else {
// RESOLVE O MAC E COLOCA NA LISTA DE ESPERA
arp.resolverEndereco(ipDestino);
synchronized (lista) {
lista.add(pacoteIP);
}
}
}
}
