private RouteReply sendRREP(RouteRequest rreq)
throws NoSuchRouteException, InvalidRouteException {
if (iAmTheDestination(rreq)) {
if (node.getCurrentSequenceNumber() + 1 == rreq.getDestinationSequenceNumber()) {
node.getNextSequenceNumber();
}
return new RouteReply(
rreq.getDestinationAddress(),
node.getCurrentSequenceNumber(),
rreq.getSourceAddress(),
rreq.getSourceSequenceNumber());
} else {
ForwardRouteEntry entry = routingTable.getForwardEntry(rreq.getDestinationAddress());
int destinationSequenceNumber = entry.getDestinationSequenceNumber();
sendGratuitousReply(rreq, destinationSequenceNumber);
int hops = entry.getNumberHops();
long lifetime = entry.getAlivetimeLeft();
return new RouteReply(
rreq.getDestinationAddress(),
destinationSequenceNumber,
rreq.getSourceAddress(),
rreq.getSourceSequenceNumber(),
hops,
lifetime);
}
}
private boolean sendRREQ(String destinationAddress, int lastDestinationSequenceNumber) {
node.getNextSequenceNumber();
node.getNextBroadcastID();
RouteRequest routeRequest =
new RouteRequest(
node.getCurrentSequenceNumber(),
node.getCurrentBroadcastID(),
destinationAddress,
lastDestinationSequenceNumber);
if (routingTable.addRouteRequest(routeRequest, true)) {
getSender().queueRoutingMessage(routeRequest);
return true;
}
return false;
}
