// Look up an older packet for responses
// Return true if the packet is unique; false if we have seen it before
private boolean rememberPacket(GnutellaPacket pkt) {
GnutellaConnection gc = (GnutellaConnection) packetTable.get(pkt.getGUID());
if (gc != null) return false;
if (DEBUG) System.err.println("**** REMEMBERING: " + pkt + " from " + pkt.getConnection());
packetTable.put(pkt.getGUID(), pkt.getConnection());
return true;
}
private void doClean(timerEvent ev) {
// Cleaner event
if (VERBOSE) System.err.println("-- Cleaning up packetTable");
// Might cause some recent packets to be dropped
packetTable.clear();
if (VERBOSE) {
Runtime r = Runtime.getRuntime();
System.err.println(
"TOTAL: " + r.totalMemory() / 1024 + "KB FREE: " + r.freeMemory() / 1024 + "KB");
}
// Reregister timer event
timer.registerEvent(CLEAN_TIMER_FREQUENCY, ev, mySink);
}
// 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);
}