update server

settings.gradle

@@ -1,4 +1,5 @@
 include 'pinger'
 include 'host-cache'
+include 'update-server'
 include 'core'
 include 'gui'

update-server/build.gradle

@@ -0,0 +1,2 @@
+apply plugin : 'application'
+mainClassName = 'com.muwire.update.UpdateServer'

update-server/src/main/groovy/com/muwire/update/UpdateServer.groovy

@@ -0,0 +1,102 @@
+package com.muwire.update
+
+import java.util.logging.Level
+
+import groovy.util.logging.Log
+import net.i2p.client.I2PClientFactory
+import net.i2p.client.I2PSession
+import net.i2p.client.I2PSessionMuxedListener
+import net.i2p.client.datagram.I2PDatagramDissector
+import net.i2p.client.datagram.I2PDatagramMaker
+
+
+@Log
+class UpdateServer {
+    public static void main(String[] args) {
+        def home = System.getProperty("user.hom") + "/.MuWireUpdateServer"
+        home = new File(home)
+        if (!home.exists())
+            home.mkdirs()
+        
+        def keyFile = new File(home, "key.dat")
+        
+        def i2pClientFactory = new I2PClientFactory()
+        def i2pClient = i2pClientFactory.createClient()
+        
+        def myDest
+        def session
+        if (!keyFile.exists()) {
+            def os = new FileOutputStream(keyFile);
+            myDest = i2pClient.createDestination(os)
+            os.close()
+            log.info "No key.dat file was found, so creating a new destination."
+            log.info "This is the destination you want to give out for your new UpdateServer"
+            log.info myDest.toBase64()
+        }
+        
+        def update = new File(home, "update.json")
+        if (!update.exists()) {
+            log.warning("update file doesn't exist, exiting")
+            System.exit(1)
+        }
+        
+        def props = System.getProperties().clone()
+        props.putAt("inbound.nickname", "MuWire UpdateServer")
+        session = i2pClient.createSession(new FileInputStream(keyFile), props)
+        myDest = session.getMyDestination()
+        
+        session.addMuxedSessionListener(new Listener(update), I2PSession.PROTO_DATAGRAM, I2PSession.PORT_ANY)
+        session.connect()
+        log.info("Connected, going to sleep")
+        Thread.sleep(Integer.MAX_VALUE)
+        
+    }
+    
+    static class Listener implements I2PSessionMuxedListener {
+        
+        private final File json
+        
+        Listener(File json) {
+            this.json = json
+        }
+
+        @Override
+        public void messageAvailable(I2PSession session, int msgId, long size) {
+        }
+
+        @Override
+        public void messageAvailable(I2PSession session, int msgId, long size, int proto, int fromport, int toport) {
+            if (proto != I2PSession.PROTO_DATAGRAM) {
+                log.warning("received uknown protocol $proto")
+                return
+            }
+            
+            def payload = session.receiveMessage(msgId)
+            def dissector = new I2PDatagramDissector()
+            try {
+                dissector.loadI2PDatagram(payload)
+                def sender = dissector.getSender()
+                // I don't think we care about the payload at this point
+                def maker = new I2PDatagramMaker(session)
+            } catch (Exception e) {
+                log.log(Level.WARNING, "exception responding to update request",e)
+            }
+        }
+
+        @Override
+        public void reportAbuse(I2PSession session, int severity) {
+        }
+
+        @Override
+        public void disconnected(I2PSession session) {
+            Log.severe("Disconnected from I2P router")
+            System.exit(1)
+        }
+
+        @Override
+        public void errorOccurred(I2PSession session, String message, Throwable error) {
+            log.log(Level.SEVERE, message, error)
+        }
+        
+    }
+}