// Forward an incoming packet to the corresponding source
private void forwardPacket(GnutellaPacket pkt) {
GnutellaConnection gc;
gc = (GnutellaConnection) packetTable.get(pkt.getGUID());
if (gc == null) {
if (VERBOSE) System.err.println("-- Received reply with no request: " + pkt);
return;
}
if (DEBUG) System.err.println("**** REPLYING: " + pkt + " to " + gc);
if ((pkt.ttl == 0) || (--pkt.ttl == 0)) {
if (VERBOSE) System.err.println("-- Dropping packet, TTL expired: " + pkt);
}
pkt.hops++;
gc.enqueue_lossy(pkt);
}
/** The main event handling code. */
public void handleEvent(QueueElementIF item) {
try {
if (DEBUG) System.err.println("**** GOT: " + item);
if (item instanceof GnutellaPingPacket) {
GnutellaPingPacket ping = (GnutellaPingPacket) item;
if (VERBOSE) System.err.println("-- Got ping: " + ping);
if (ROUTE_PACKETS) {
if (rememberPacket(ping)) {
forwardPacketToAll(ping);
}
}
if (SEND_PONGS) {
GnutellaPongPacket pong = new GnutellaPongPacket(ping.getGUID(), NUM_FILES, NUM_KB);
if (VERBOSE) System.err.println("-- Sending pong to: " + ping.getConnection());
ping.getConnection().enqueue_lossy(pong);
}
} else if (item instanceof GnutellaQueryPacket) {
GnutellaQueryPacket query = (GnutellaQueryPacket) item;
if (VERBOSE) System.err.println("-- Got query: " + query.getSearchTerm());
if (ROUTE_PACKETS) {
if (rememberPacket(query)) {
forwardPacketToAll(query);
}
}
} else if (item instanceof GnutellaPongPacket) {
GnutellaPongPacket pong = (GnutellaPongPacket) item;
if (VERBOSE) System.err.println("-- Got pong: " + pong);
if (ROUTE_PACKETS) forwardPacket(pong);
} else if (item instanceof GnutellaQueryHitsPacket) {
GnutellaQueryHitsPacket hits = (GnutellaQueryHitsPacket) item;
if (VERBOSE) System.err.println("-- Got hits: " + hits);
if (ROUTE_PACKETS) forwardPacket(hits);
} else if (item instanceof GnutellaPushPacket) {
if (VERBOSE) System.err.println("-- Dropping push packet (unimplemented)");
} else if (item instanceof GnutellaConnection) {
if (VERBOSE) System.err.println("-- New connection: " + item);
num_connections++;
} else if (item instanceof SinkClosedEvent) {
if (VERBOSE) System.err.println("-- Connection closed: " + item);
num_connections--;
SinkClosedEvent sce = (SinkClosedEvent) item;
if ((num_connections <= MIN_CONNECTIONS) && DO_CATCHER) doCatcher();
} else if (item instanceof SinkCloggedEvent) {
if (VERBOSE) System.err.println("-- Connection clogged: " + item);
SinkCloggedEvent clogged = (SinkCloggedEvent) item;
// Close down clogged connections
GnutellaConnection gc = (GnutellaConnection) clogged.sink;
System.err.println("GL: Closing clogged connection " + gc);
gc.close(mySink);
} else if (item instanceof timerEvent) {
doTimer((timerEvent) item);
}
} catch (Exception e) {
System.err.println("WORKER GOT EXCEPTION: " + e.getMessage());
e.printStackTrace();
}
}