private void receiveRREP(RouteReply routeReply)
throws NoSuchRouteException, InvalidRouteException {
if (BuildConfig.DEBUG) {
Debug.debugMessage(routeReply, getMyAddresses(), true, false);
}
createOrUpdatePathTo(
routeReply.getPreviousHop(),
Constants.UNKNOWN_SEQUENCE_NUMBER,
routeReply.getPreviousHop(),
1);
routeReply.incrementHopCount();
if (createOrUpdatePathTo(
routeReply.getDestinationAddress(),
routeReply.getDestinationSequenceNumber(),
routeReply.getPreviousHop(),
routeReply.getHopCount())
== true) {
if (!getMyAddresses().contains(routeReply.getSourceAddress())) {
String nextHop = routingTable.getPathToDestination(routeReply.getSourceAddress());
routingTable.addPrecursorNode(routeReply.getDestinationAddress(), nextHop);
routingTable.addPrecursorNode(routeReply.getPreviousHop(), nextHop);
getSender().queueRoutingMessage(routeReply);
}
}
}
void queueNewRouteRequest(String destinationAddress, int lastKnownSequenceNumber) {
if (!sendRREQ(destinationAddress, lastKnownSequenceNumber)) {
if (BuildConfig.DEBUG) {
StringBuffer message = new StringBuffer("Nao enviou RREQ apos RRER");
Log.d(getClass().getName(), message.toString());
Debug.debugMessage(message);
}
}
}
private void receiveHello(Hello hello) {
try {
routingTable.updateByHello(hello.getSourceAddress(), hello.getSourceSequenceNumber());
} catch (NoSuchRouteException e) {
routingTable.createForwardRouteEntry(
hello.getSourceAddress(), hello.getSourceSequenceNumber(), hello.getSourceAddress(), 1);
}
Debug.debugMessage(
new StringBuffer("Receiver: received hello pdu from: " + hello.getSourceAddress()));
}
@Override
public void routeMessage(RoutingMessage message) throws RoutingException {
super.routeMessage(message);
try {
if (message.getType().equalsIgnoreCase(AODVMessage.AODV_MESSAGE)) {
AODVMessage aodvMessage = (AODVMessage) message;
switch (aodvMessage.getMessageType()) {
case RREQ:
receiveRREQ((RouteRequest) aodvMessage);
break;
case RREP:
receiveRREP((RouteReply) aodvMessage);
break;
case RRER:
receiveRRER((RouteError) aodvMessage);
break;
case HELLO:
receiveHello((Hello) aodvMessage);
break;
default:
break;
}
} else {
if (message.getType().equalsIgnoreCase(UserDataMessage.class.getCanonicalName())) {
Debug.debugMessage((UserDataMessage) message, getMyAddresses(), true, false);
if (getMyAddresses().contains(message.getDestinationAddress())) {
getReceiver().queueDataMesssage((UserDataMessage) message);
} else {
if (isBrodcastMessage(message)) {
((UserDataMessage) message).decrementTtl();
getReceiver().queueDataMesssage((UserDataMessage) message);
}
forwardData(message);
}
}
}
} catch (TimeToLiveExpiredException e) {
e.printStackTrace();
} catch (NoSuchRouteException e) {
e.printStackTrace();
} catch (InvalidRouteException e) {
e.printStackTrace();
}
}
private void receiveRRER(RouteError routeError) {
if (BuildConfig.DEBUG) {
Debug.debugMessage(routeError, getMyAddresses(), true, false);
}
try {
int lastKnowSequenceNumber =
routingTable.getDestinationSequenceNumberTo(routeError.getUnreachableNodeAddress());
if (routeError.getUnreachableNodeSequenceNumber() >= lastKnowSequenceNumber) {
queueRouteErrorMessage(
routeError.getUnreachableNodeAddress(),
routeError.getUnreachableNodeSequenceNumber(),
routingTable.getPrecusors(routeError.getUnreachableNodeAddress()));
routingTable.setInvalid(
routeError.getUnreachableNodeAddress(), routeError.getUnreachableNodeSequenceNumber());
}
} catch (AODVException e) {
e.printStackTrace();
}
}
private void receiveRREQ(RouteRequest routeRequest) {
if (BuildConfig.DEBUG) {
Debug.debugMessage(routeRequest, getMyAddresses(), true, false);
}
createOrUpdatePathTo(
routeRequest.getPreviousHop(),
Constants.UNKNOWN_SEQUENCE_NUMBER,
routeRequest.getPreviousHop(),
1);
if (routingTable.routeRequestExist(routeRequest)) {
return;
}
routingTable.addRouteRequest(routeRequest, false);
routeRequest.incrementHopCount();
createOrUpdatePathTo(
routeRequest.getSourceAddress(),
routeRequest.getSourceSequenceNumber(),
routeRequest.getPreviousHop(),
routeRequest.getHopCount());
RouteReply rrep = null;
try {
rrep = sendRREP(routeRequest);
} catch (InvalidRouteException e) {
routeRequest.setDestinationSequenceNumber(
Math.max(e.getLastSequenceNumber(), routeRequest.getDestinationSequenceNumber()));
} catch (NoSuchRouteException e) {
} finally {
if (rrep != null) {
sender.queueRoutingMessage(rrep);
} else {
sender.queueRoutingMessage(routeRequest);
}
}
}
