2004-12-14 jrandom

* Reenable the probabalistic drop on the TCP queues to deal with good old
      fashioned bandwidth limiting.  However, by default the probability is
      rigged to reserve 0% of the queue free - meaning we just aggressively
      fail messages in the queue if we're transferring too slowly.  That
      reservation factor can be increased with 'tcp.queueFreeFactor=0.25'
      (or whatever) and the drop code can be disabled with the parameter
      'tcp.dropProbabalistically=false'.
    * Still penalize a peer on tunnel failure, but don't immediately drop
      their capacity to 0.
    * More aggressively ACK duplicates
    * Randomize the timestamper period
    * Display the clock skew on the connection logs when a peer sends it.
    * Allow the timestamper to fix skews of up to 10 minutes
    * Logging

core/java/src/net/i2p/time/Timestamper.java

@@ -124,7 +124,8 @@ public class Timestamper implements Runnable {
                         alreadyBitched = true;
                     }
                 }
-                try { Thread.sleep(_queryFrequency); } catch (InterruptedException ie) {}
+                long sleepTime = _context.random().nextInt(_queryFrequency) + _queryFrequency;
+                try { Thread.sleep(sleepTime); } catch (InterruptedException ie) {}
             }
         } catch (Throwable t) {
             _log.log(Log.CRIT, "Timestamper died!", t);

core/java/src/net/i2p/util/Clock.java

@@ -42,8 +42,8 @@ public class Clock implements Timestamper.UpdateListener {
 
     /** if the clock is skewed by 3+ days, fuck 'em */
     public final static long MAX_OFFSET = 3 * 24 * 60 * 60 * 1000;
-    /** after we've started up and shifted the clock, don't allow shifts of more than a minute */
-    public final static long MAX_LIVE_OFFSET = 60 * 1000;
+    /** after we've started up and shifted the clock, don't allow shifts of more than 10 minutes */
+    public final static long MAX_LIVE_OFFSET = 10 * 60 * 1000;
     /** if the clock skewed changes by less than 1s, ignore the update (so we don't slide all over the place) */
     public final static long MIN_OFFSET_CHANGE = 10 * 1000;