work on handling pings

core/src/main/groovy/com/muwire/core/connection/Connection.groovy

@@ -6,6 +6,8 @@ import java.util.concurrent.atomic.AtomicBoolean
 import java.util.logging.Level
 
 import com.muwire.core.EventBus
+import com.muwire.core.hostcache.HostCache
+import com.muwire.core.hostcache.HostDiscoveredEvent
 
 import groovy.util.logging.Log
 import net.i2p.data.Destination
@@ -16,6 +18,7 @@ abstract class Connection implements Closeable {
 	final EventBus eventBus
 	final Endpoint endpoint
 	final boolean incoming
+	final HostCache hostCache
 	
 	private final AtomicBoolean running = new AtomicBoolean()
 	private final BlockingQueue messages = new LinkedBlockingQueue()
@@ -25,10 +28,11 @@ abstract class Connection implements Closeable {
 	
 	long lastPingSentTime, lastPingReceivedTime
 	
-	Connection(EventBus eventBus, Endpoint endpoint, boolean incoming) {
+	Connection(EventBus eventBus, Endpoint endpoint, boolean incoming, HostCache hostCache) {
 		this.eventBus = eventBus
 		this.incoming = incoming
 		this.endpoint = endpoint
+		this.hostCache = hostCache
 		
 		this.name = endpoint.destination.toBase32().substring(0,8)
 		
@@ -102,4 +106,23 @@ abstract class Connection implements Closeable {
 		ping.version = 1
 		messages.put(ping)
 	}
+	
+	protected void handlePing() {
+		log.fine("$name received ping")
+		def pong = [:]
+		pong.type = "Pong"
+		pong.version = 1
+		pong.pongs = hostCache.getGoodHosts(10).collect { d -> d.toBase64() }
+		messages.put(pong)
+	}
+	
+	protected void handlePong(def pong) {
+		log.fine("$name received pong")
+		if (pong.pongs == null)
+			throw new Exception("Pong doesn't have pongs")
+		pong.pongs.each { 
+			def dest = new Destination(it)
+			eventBus.publish(new HostDiscoveredEvent(destination: dest))
+		}
+	}
 }

core/src/main/groovy/com/muwire/core/connection/LeafConnection.groovy

@@ -4,6 +4,7 @@ import java.io.InputStream
 import java.io.OutputStream
 
 import com.muwire.core.EventBus
+import com.muwire.core.hostcache.HostCache
 
 import net.i2p.data.Destination
 
@@ -14,8 +15,8 @@ import net.i2p.data.Destination
  */
 class LeafConnection extends Connection {
 
-	public LeafConnection(EventBus eventBus, Endpoint endpoint) {
-		super(eventBus, endpoint, true);
+	public LeafConnection(EventBus eventBus, Endpoint endpoint, HostCache hostCache) {
+		super(eventBus, endpoint, true, hostCache);
 	}
 
 	@Override

core/src/main/groovy/com/muwire/core/connection/PeerConnection.groovy

@@ -4,35 +4,73 @@ import java.io.InputStream
 import java.io.OutputStream
 
 import com.muwire.core.EventBus
+import com.muwire.core.hostcache.HostCache
+import com.muwire.core.util.DataUtil
 
+import groovy.json.JsonOutput
+import groovy.json.JsonSlurper
+import groovy.util.logging.Log
 import net.i2p.data.Destination
 
 /**
  * This side is an ultrapeer and the remote is an ultrapeer too
  * @author zab
  */
+@Log
 class PeerConnection extends Connection {
 	
 	private final DataInputStream dis
 	private final DataOutputStream dos
+	
+	private final byte[] readHeader = new byte[3]
+	private final byte[] writeHeader = new byte[3]
+	
+	private final JsonSlurper slurper = new JsonSlurper()
 
 	public PeerConnection(EventBus eventBus, Endpoint endpoint,
-			boolean incoming) {
-		super(eventBus, endpoint, incoming)
+			boolean incoming, HostCache hostCache) {
+		super(eventBus, endpoint, incoming, hostCache)
 		this.dis = new DataInputStream(endpoint.inputStream)
 		this.dos = new DataOutputStream(endpoint.outputStream)
 	}
 
 	@Override
 	protected void read() {
-		// TODO Auto-generated method stub
+		dis.readFully(readHeader)
+		int length = DataUtil.readLength(readHeader)
+		log.fine("$name read length $length")
 		
+		byte[] payload = new byte[length]
+		dis.readFully(payload)
+		
+		if (readHeader[0] & 0x80 == 0x80) {
+			// TODO process binary
+		} else {
+			def json = slurper.parse(payload)
+			if (json.type == null)
+				throw new Exception("missing json type")
+			switch(json.type) {
+				case "Ping" : handlePing(); break;
+				case "Pong" : handlePong(json); break;
+				default :
+					throw new Exception("unknown json type ${json.type}")
+			}
+		}
 	}
 
 	@Override
 	protected void write(Object message) {
-		// TODO Auto-generated method stub
+		byte [] payload
+		if (message instanceof Map) {
+			payload = JsonOutput.toJson(message)
+			DataUtil.packHeader(payload.bytes.length, writeHeader)
+			writeHeader[0] &= 0x7F
+		} else {
+			// TODO: write binary
+		}
 		
+		dos.write(writeHeader)
+		dos.write(payload)
 	}
 
 }

core/src/main/groovy/com/muwire/core/connection/UltrapeerConnection.groovy

@@ -4,6 +4,7 @@ import java.io.InputStream
 import java.io.OutputStream
 
 import com.muwire.core.EventBus
+import com.muwire.core.hostcache.HostCache
 
 import net.i2p.data.Destination
 
@@ -15,8 +16,8 @@ import net.i2p.data.Destination
  */
 class UltrapeerConnection extends Connection {
 
-	public UltrapeerConnection(EventBus eventBus, Endpoint endpoint) {
-		super(eventBus, endpoint, false)
+	public UltrapeerConnection(EventBus eventBus, Endpoint endpoint, HostCache hostCache) {
+		super(eventBus, endpoint, false, hostCache)
 	}
 
 	@Override