* I2NP: Various cleanup and bulletproofing

router/java/test/net/i2p/data/i2np/DateMessage.java

@@ -0,0 +1,77 @@
+package net.i2p.data.i2np;
+/*
+ * free (adj.): unencumbered; not under the control of others
+ * Written by jrandom in 2003 and released into the public domain
+ * with no warranty of any kind, either expressed or implied.
+ * It probably won't make your computer catch on fire, or eat
+ * your children, but it might.  Use at your own risk.
+ *
+ */
+
+import java.io.IOException;
+
+import net.i2p.I2PAppContext;
+import net.i2p.data.DataHelper;
+
+/**
+ * Contains the sending router's current time, to sync (and verify sync)
+ *
+ */
+public class DateMessage extends I2NPMessageImpl {
+    public final static int MESSAGE_TYPE = 16;
+    private long _now;
+    
+    public DateMessage(I2PAppContext context) {
+        super(context);
+        _now = context.clock().now();
+    }
+    
+    public long getNow() { return _now; }
+    public void setNow(long now) { _now = now; }
+    
+    public void readMessage(byte data[], int offset, int dataSize, int type) throws I2NPMessageException, IOException {
+        if (type != MESSAGE_TYPE) throw new I2NPMessageException("Message type is incorrect for this message");
+        int curIndex = offset;
+        
+        _now = DataHelper.fromLong(data, curIndex, DataHelper.DATE_LENGTH);
+    }
+    
+    /** calculate the message body's length (not including the header and footer */
+    protected int calculateWrittenLength() { 
+        return DataHelper.DATE_LENGTH; // now
+    }
+    /** write the message body to the output array, starting at the given index */
+    protected int writeMessageBody(byte out[], int curIndex) throws I2NPMessageException {
+        if (_now <= 0) throw new I2NPMessageException("Not enough data to write out");
+        
+        DataHelper.toLong(out, curIndex, DataHelper.DATE_LENGTH, _now);
+        curIndex += DataHelper.DATE_LENGTH;
+        return curIndex;
+    }
+    
+    public int getType() { return MESSAGE_TYPE; }
+    
+    @Override
+    public int hashCode() {
+        return (int)getNow();
+    }
+    
+    @Override
+    public boolean equals(Object object) {
+        if ( (object != null) && (object instanceof DateMessage) ) {
+            DateMessage msg = (DateMessage)object;
+            return msg.getNow() == getNow();
+        } else {
+            return false;
+        }
+    }
+    
+    @Override
+    public String toString() {
+        StringBuilder buf = new StringBuilder();
+        buf.append("[DateMessage: ");
+        buf.append("Now: ").append(_now);
+        buf.append("]");
+        return buf.toString();
+    }
+}