diff --git a/js/dos/old/router.js b/js/dos/old/router.js
new file mode 100644
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+++ b/js/dos/old/router.js
@@ -0,0 +1,1827 @@
+/**
+ **      ==============================
+ **       O           O      O   OOOO
+ **       O           O     O O  O   O
+ **       O           O     O O  O   O
+ **       OOOO   OOOO O     OOO  OOOO
+ **       O   O       O    O   O O   O
+ **       O   O       O    O   O O   O
+ **       OOOO        OOOO O   O OOOO
+ **      ==============================
+ **      Dr. Stefan Bosse http://www.bsslab.de
+ **
+ **      COPYRIGHT: THIS SOFTWARE, EXECUTABLE AND SOURCE CODE IS OWNED
+ **                 BY THE AUTHOR(S).
+ **                 THIS SOURCE CODE MAY NOT BE COPIED, EXTRACTED,
+ **                 MODIFIED, OR OTHERWISE USED IN A CONTEXT
+ **                 OUTSIDE OF THE SOFTWARE SYSTEM.
+ **
+ **    $AUTHORS:     Stefan Bosse
+ **    $INITIAL:     (C) 2015-2016 bLAB
+ **    $CREATED:     4-4-15.
+ **    $VERSION:     1.3.17
+ **
+ **    $INFO:
+ **
+ ** RPCIO Message ROUTER
+ *
+ * There are:
+ *
+ * A. Client-app hosts using Broker (Synchronous HTTP broker connection, i.e., Browsers, Asynchronous/Synchronous TCPNET broker connection)
+ * B. Client-app hosts P2P (UDP VLC connection)
+ * C. Broker Server (servicing client HTTP / TCPNET connctions)
+ * D. Mixed app-mode B+C
+ *
+ *
+ * The router passes RPC messages (trans, getreq, putrep, lookup, iamhere,...) between different
+ * processes of a host (local routing), manages synchronization with the scheduler, sends messages
+ * to a broker server, and collects messages from a broker server (if this is a broker client
+ * application). The router manages server port look-ups, generates lookup messages, queues
+ * transactions, and is the interface between processes and the network. Finally, the router forwards
+ * messages between different nodes using P2P connections.
+ **
+ **    $ENDOFINFO
+ */
+
+"use strict";
+var log = 0;
+var timestamp=0;
+
+var util = Require('util');
+var Io = Require('com/io');
+var Net = Require('dos/network');
+var Buf = Require('dos/buf');
+var Rpc = Require('dos/rpc');
+var Conn = Require('dos/connutils');
+var Sch = Require('dos/scheduler');
+var Comp = Require('com/compat');
+var Perv = Comp.pervasives;
+var String = Comp.string;
+var Obj = Comp.obj;
+var Array = Comp.array;
+var Printf = Comp.printf;
+var xmldoc = Require('dos/ext/xmldoc');
+var trace = Io.tracing;
+var Status = Net.Status;
+var assert = Comp.assert;
+var div = Comp.div;
+
+var PORT_CACHE_MAXLIVE = 200;
+
+/*
+** Allocate pool table in chunks of size...
+ */
+var CHUNK_SIZE = 100;
+
+/**
+** The router passes RPC IO handlers from clients
+** to servers and vice versa. The two different router modes: server (http server capable)
+** and application mode (only http client capable) and requiring a broker server for global routing.
+**
+** There are :
+**  1. Local Servers (getreq, putrep)
+**  2. Local Clients (trans)
+**  3. Remote Servers
+**  4. Remote Clients
+ *
+** There are:
+ *  1. Broker Client Apps (Browser-app, node-app)
+ *  2. P2P Client Apps (node-app, broker)
+ *  3. Server Apps (broker)
+ *
+** The router must be configured differently for client applications (Browser comp.) and
+** the broker server (node.js comp.). Additionally, a client app. can be hosted (node.js comp.),
+** embedding the broker server. The broker server includes a in-memory DNS server.
+ *
+ *
+ * @param {port} hostport
+ * @constructor
+ * @typedef {{hostport:port,broker:httpConnection,connections:rpcconn [],trans_queue:[],req_queue:[],lookup_queue:[],lookup_cache:[],port_mapping:[],
+ *            host_mapping:[],rpcio_pool:rpcio [],rpcio_pool_head,rpcio_pool_size,rpcio_pool_next,event:function(),
+ *            stats}} rpcrouter~obj
+ * @see rpcrouter~obj
+ * @see rpcrouter~meth
+ */
+var rpcrouter = function (hostport,options) {
+    this.options=options||{};
+    // this public host port
+    this.hostport=hostport;
+    // Is the router used by a broker server?
+    this.broker=undefined;
+    
+    // Connection to a broker (HTTP client mode, Browser App.) : Connection
+    this.brokerconn=undefined;
+    this.brokerserver=false;
+
+    // Connections links to other nodes, only in Server-App. mode used (broker server, node) : [rpcconn]
+    this.connections=[];
+
+    // Local service: transaction queue (local and remote transactions serviced locally)
+    this.trans_queue=[];
+    // Local service: local server request queue
+    this.req_queue=[];
+
+    // Pending lookup of service ports (rpcio array)
+    this.lookup_queue=[];
+    // Cache all client hosts checking already for a server port
+    this.lookup_cache=[];
+
+    /*
+    ** Host/Application port -- Server port mapping
+    ** Hash table: key:public app-server port, value: public host port
+    ** port_mapping[srvport]==hostport
+    */
+    this.port_mapping=[];           // server port => host port
+    this.port_mapping_live=[];      // Timeout for garbage colletion
+
+    /*
+    ** Hostport routing table
+     ** Hash table: key:public host port, value: connection port
+     ** host_mapping[hostport]==[url,ipport]
+    **
+    */
+    this.host_mapping=[];           // host port => connection link port
+    this.host_mapping_live=[];
+
+    /*
+    ** Semi-static packet pool (rpcio ~ RPC/FLIP packet)
+    */
+    this.rpcio_pool=[];
+    this.rpcio_pool_head=-1;
+    this.rpcio_pool_size=0;
+    this.rpcio_pool_next=-1;
+
+    /*
+    ** Externally supplied event handler(s)
+     */
+    this.event=[];
+
+    this.stats = {
+        op_transreq:0,
+        op_transrep:0,
+        op_getreq:0,
+        op_putrep:0,
+        op_lookup:0,
+        op_whereis:0,
+        op_hereis:0,
+        op_iamhere:0,
+        op_brokerreq:0,
+        op_brokerrep:0,
+        op_brokernoent:0,
+        op_transabort:0,
+        op_lookupabort:0,
+        op_error:0
+    };
+
+    this.monitor=this.options.monitor||0;
+    this.verbose=this.options.verbose||0;
+};
+
+
+/**
+ * @typedef {{route:rpcrouter.route}} rpcrouter~meth
+ */
+
+/**
+ ** Add a client-to-broker connection.
+ ** A HTTP or TPCNET broker connection is used by a client application. The connection
+ ** provides the send and service operations to the broker server.
+ *
+ *
+ * @param {httpConnection} conn
+ */
+rpcrouter.prototype.set_broker_conn = function(conn) {
+    this.brokerconn=conn;
+    this.add_conn(conn.rpccon);
+};
+
+/**
+ * Add a broker server object (i.e., the router is used by a broker server).
+ */
+rpcrouter.prototype.set_broker = function(service) {
+    this.broker=service;
+};
+
+rpcrouter.prototype.log = function(v) {
+    log=v;
+};
+
+/**
+ * Add an optional event handler called each time the trans_queue,.., are modified.
+ *
+ * @param {function} evfun
+ */
+rpcrouter.prototype.add_event = function(evfun) {
+    this.event.push(evfun);
+};
+
+/*
+** Packet pool (rpcio handle) management
+*/
+
+rpcrouter.prototype.pkt_alloc = function() {
+    var rpcio;
+    var off=this.rpcio_pool_size;
+    for(var i=0;i<CHUNK_SIZE;i++) {
+        rpcio=Rpc.Rpcio();
+        this.rpcio_pool.push(rpcio);
+    }
+    this.rpcio_pool_size=this.rpcio_pool_size+CHUNK_SIZE;
+};
+
+/**
+ * Init a packet rpcio object
+ *
+ * @param {rpcio} rpcio
+ */
+rpcrouter.prototype.pkt_init = function(rpcio) {
+    rpcio.operation=undefined;
+    rpcio.pubport=undefined;
+    rpcio.connport=undefined;
+    rpcio.header.h_status=undefined;
+    rpcio.header.h_command=undefined;
+    rpcio.header.h_port=Net.Port();
+    rpcio.header.h_priv=Net.Private();
+    rpcio.hostport=undefined;
+    rpcio.sendport=undefined;
+    rpcio.data=new Buffer('');
+    rpcio.pos=0;
+    rpcio.tid=-1;
+    rpcio.timeout=-1;
+    rpcio.hop=0;
+    rpcio.hop_max=Net.DEF_RPC_MAX_HOP;
+    rpcio.status=undefined;
+    rpcio.context=undefined;
+
+};
+
+/**
+ * Get a packet rpcio object from the pool.
+ *
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.pkt_get = function() {
+    var next=-1;
+    var rpcio;
+    if (this.rpcio_pool_next >= 0) {
+        next=this.rpcio_pool_next;
+        this.rpcio_pool_next=-1;
+    } else if (this.rpcio_pool_head==this.rpcio_pool_size-1) {
+        // Try to find a free slot
+        loop: for(var i=0;i<this.rpcio_pool_size;i++) {
+            if (this.rpcio_pool[i].index==-1) {next=i; break loop;}
+        }
+        if (next==-1) {
+            next=this.rpcio_pool_head;
+            this.rpcio_pool_head++;
+            this.pkt_alloc();
+        }
+    } else {
+        next= this.rpcio_pool_head;
+        this.rpcio_pool_head++;
+        if (this.rpcio_pool_head>=this.rpcio_pool_size)
+            this.pkt_alloc();
+    }
+    if (next!=-1) {
+        rpcio = this.rpcio_pool[next];
+        // Only a handle in use has a valid index value!
+        rpcio.index=next;
+        this.pkt_init(rpcio);
+    }
+    else rpcio = undefined;
+    return rpcio;
+};
+
+/**
+ * Return a packet rpcio object to the pool.
+ *
+ * @param {rpcio} rpcio
+ */
+rpcrouter.prototype.pkt_discard = function(rpcio) {
+    if (rpcio.index != -1) this.rpcio_pool_next=rpcio.index;
+    else Io.warn('pkt_discard: packet not from packet pool! '+Rpc.Print.rpcio(rpcio));
+    // mark rpcio packet handle as free!
+    rpcio.index=-1;
+    rpcio.data=undefined;
+};
+
+/**
+** Add and remove local service ports (register public port of a server)
+*
+ *
+ * @param {port} srvport
+ * @param {port} [hostport]
+ * @param [timeout]
+ */
+rpcrouter.prototype.add_port = function(srvport,hostport,timeout) {
+    var exists=false;
+    if (hostport==undefined) hostport=this.hostport;
+    if (this.port_mapping[srvport] != undefined) exists=true;
+    this.port_mapping[srvport]=hostport;
+    if (timeout != undefined)
+        this.port_mapping_live[srvport]=timeout;
+    else
+        this.port_mapping_live[srvport]=PORT_CACHE_MAXLIVE;
+    // forward local server ports to the broker server if in client appl. mode
+    if (!exists && this.brokerconn && this.brokerconn.status == Net.Status.STD_OK && Net.port_cmp(hostport,this.hostport)) {
+        // short message
+        
+        Io.log((this.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] add_port: publishing port on broker '+Net.Print.port(srvport)));
+        var msg = {type:'iamhere',hostport:this.hostport,srvport:srvport};
+        this.brokerconn.send(msg,function (reply) {
+            Io.log((log<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] add_port: got answer from broker '+reply));
+        })
+    } else if (!exists) {
+        Io.log((this.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] add_port: publishing port '+Net.Print.port(srvport)));
+    
+    }
+};
+
+/**
+ *
+ * @param {port} srvport
+ */
+rpcrouter.prototype.remove_port = function(srvport) {
+    this.port_mapping[srvport]=undefined;
+};
+
+/**
+ *
+ * @param {port} srvport
+ * @returns {port}
+ */
+rpcrouter.prototype.lookup_port = function(srvport) {
+    var found = this.port_mapping[srvport] ;
+    // Refresh live time
+    if (found!= undefined && this.port_mapping_live[srvport]>0)
+        this.port_mapping_live[srvport]=PORT_CACHE_MAXLIVE;
+    return found;
+};
+
+/**
+** Add a local RPC service listener (ready getreq called by a server)
+ *
+ *
+ * @param rpcio
+ */
+rpcrouter.prototype.add_service = function(rpcio) {
+    this.req_queue.push(rpcio);
+};
+
+/** Find a RPC service listener (matching getreq)
+ *
+ * @param {port} port
+ * @param {rpcio} rpcio
+ * @param {function} callback
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.lookup_service = function(port,rpcio,callback) {
+    var found=undefined;
+    loop: for (var i in this.req_queue) {
+        var rpcios=this.req_queue[i];
+        // public port compare
+        if (Net.port_cmp(rpcios.pubport,port)) {
+            // TBD check valid hdr.hdr_priv field
+            found=rpcios;
+            Net.Copy.header(rpcio.header,rpcios.header);
+            rpcios.tid=rpcio.tid;
+            Buf.buf_copy(rpcios,rpcio);
+            if (callback != undefined) rpcios.callback=callback;
+            this.req_queue.splice(i,1);
+            break loop;
+        }
+    }
+    return found;
+};
+
+/**
+** Add a local (client&server appl.) or remote (server app. only) pending transaction 
+** (1. local server not ready, but it is registered, 2. remote client has not downloaded the request)
+ *
+ *
+ * @param {rpcio} rpcio
+ */
+rpcrouter.prototype.add_trans = function(rpcio) {
+    this.trans_queue.push(rpcio);
+    /*
+    ** Trigger a callback notification function that handles transaction queue updates. It is optional.
+     */
+    if (this.event.length>0)
+      Array.iter(this.event,function (f) {f()});
+};
+
+/** Remove a RPCIO transaction from the queue.
+ *
+ * @param rpcio
+ * @returns {boolean}
+ */
+rpcrouter.prototype.remove_trans = function(rpcio) {
+    var found=false;
+    loop: for (var i in this.trans_queue) {
+        var rpcioc=this.trans_queue[i];
+        if (rpcioc.index==rpcio.index) {
+            found=true;
+            this.trans_queue.splice(i,1);
+            break loop;
+        }
+    }
+    return found;
+};
+
+/** Find and remove a queued transaction for public RPC server port 'port'.
+**
+ *
+ * @param {port} srvport
+ * @param {rpcio} rpcio
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.lookup_trans = function(srvport,rpcio) {
+    var rpcios=rpcio;
+    var found=undefined;
+    loop: for (var i in this.trans_queue) {
+        var rpcioc=this.trans_queue[i];
+        // public port compare
+
+        // TBD
+        if (rpcioc.operation==Rpc.Operation.TRANSREQ && Net.port_cmp(rpcioc.header.h_port,srvport)) {
+            // TBD check valid hdr.hdr_priv field
+            found=rpcioc;
+            if (rpcios != undefined) {
+                Net.Copy.header(rpcioc.header,rpcios.header);
+                Buf.buf_copy(rpcios,rpcioc);
+                rpcios.tid = rpcioc.tid;
+                if (rpcioc.callback != undefined) rpcios.callback = rpcioc.callback;
+            }
+            this.trans_queue.splice(i,1);
+            break loop;
+        }
+    }
+    return found;
+};
+
+/** Find and remove a queued transaction for:
+**  1. A server on host 'hostport' (TRANSREQ)
+**  2. A client on host 'hostport' (TRANSREP)
+ *
+ *
+ * @param {port} hostport
+ * @param {rpcio} [rpcio]
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.lookup_trans_for_host = function(hostport,rpcio) {
+    var rpcios=rpcio;
+    var found=undefined;
+    loop: for (var i in this.trans_queue) {
+        var rpcioc=this.trans_queue[i];
+        // public port compare
+        var hostport2 = this.lookup_port(rpcioc.header.h_port);
+        Io.log((this.monitor<10)||('[ROUT'+(timestamp?Perv.mtime():'')+'] lookup_trans_for_host: '+
+                          Net.Print.port(hostport)+'? '+Net.Print.port(rpcioc.header.h_port)+' -> '+Net.Print.port(hostport2)));
+        if ((hostport2 && rpcioc.operation==Rpc.Operation.TRANSREQ && Net.port_cmp(hostport,hostport2)) ||
+            (rpcioc.sendport && rpcioc.operation==Rpc.Operation.TRANSREP && Net.port_cmp(hostport,rpcioc.sendport)) ||
+            (rpcioc.sendport && rpcioc.operation==Rpc.Operation.TRANSREQ && Net.port_cmp(hostport,rpcioc.sendport))) {
+            found=rpcioc;
+            if (rpcios != undefined) {
+                Net.Copy.header(rpcioc.header,rpcios.header);
+                Buf.buf_copy(rpcios,rpcioc);
+                rpcios.tid = rpcioc.tid;
+                if (rpcioc.callback != undefined) rpcios.callback = rpcioc.callback;
+            }
+            this.trans_queue.splice(i,1);
+            break loop;
+        }
+    }
+    return found;
+};
+
+/** Find and remove a queued waiting transaction with transaction number tid
+ *  Default expected operation: TRANSAWAIT (can be overriden).
+ *
+ * @param {port} srvport
+ * @param {number} tid
+ * @param {rpcio} [rpcio]
+ * @param {Operation} [operation]
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.lookup_trans_await = function(srvport,tid,rpcio,operation) {
+    var rpcios=rpcio;
+    var found=undefined;
+    loop: for (var i in this.trans_queue) {
+        var rpcioc=this.trans_queue[i];
+        // public port compare
+        if (rpcioc.operation==(operation||Rpc.Operation.TRANSAWAIT) &&
+            rpcioc.tid==tid && Net.port_cmp(rpcioc.header.h_port,srvport))  {
+            found=rpcioc;
+            if (rpcios != undefined) {
+                Net.Copy.header(rpcios.header,rpcioc.header);
+                Buf.buf_copy(rpcioc,rpcios);
+                rpcioc.tid = rpcios.tid;
+            }
+            this.trans_queue.splice(i,1);
+            break loop;
+        }
+    }
+    return found;
+};
+
+/** Find all queued waiting transactions for the specified RPC server port.
+ *
+ *
+ * @param {port} srvport
+ * @returns {rpcio []}
+ */
+rpcrouter.prototype.find_all_trans = function(srvport) {
+    var found=[];
+    for (var i in this.trans_queue) {
+        var rpcioc=this.trans_queue[i];
+        // public port compare
+        if (Net.port_cmp(rpcioc.header.h_port,srvport))  {
+            found.push(rpcioc);
+        }
+    }
+    return found;
+};
+
+
+/**
+ ** Create and add a new pending RPC server lookup (register public port of a server)
+ *
+ *
+ * @param {port} srvport
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.new_lookup = function(srvport) {
+    var i,found;
+    found=undefined;
+    loop: for(i in this.lookup_queue) {
+        var lookup=this.lookup_queue[i];
+        if (Net.port_cmp(lookup.header.h_port,srvport) &&
+            Net.port_cmp(lookup.hostport,this.hostport)) {
+            found=lookup;
+            break loop;
+        }
+    }
+    if (!found) {
+        var rpcio=this.pkt_get();
+        rpcio.init(Rpc.Operation.LOOKUP);
+        rpcio.header.h_port=srvport;
+        rpcio.hostport=this.hostport;
+        rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+        this.lookup_queue.push(rpcio);
+        this.lookup_cache.push([]);
+        found=rpcio;
+    }
+    return found;
+};
+
+/**
+ ** Add a pending RPC server lookup
+ *
+ *
+ * @param {rpcio} rpcio
+ */
+rpcrouter.prototype.add_lookup = function(rpcio) {
+    var i,found;
+    found=undefined;
+    loop: for(i in this.lookup_queue) {
+        var lookup=this.lookup_queue[i];
+        if (Net.port_cmp(lookup.header.h_port,rpcio.header.h_port)) {
+            found=lookup;
+            break loop;
+        }
+    }
+    if (!found) {
+        this.lookup_queue.push(rpcio);
+        this.lookup_cache.push([]);
+    }
+    if (this.event.length>0)
+      Array.iter(this.event,function (f) {f()});
+};
+
+/** Remove all pending LOOKUPs for specified RPC server port.
+ *  Return all found LOOKUP messages.
+ *
+ * @param {port} srvport
+ * @returns {rpcio []}
+ */
+rpcrouter.prototype.remove_lookup = function(srvport) {
+    var i;
+    var found = [];
+    loop: for(i in this.lookup_queue) {
+        var lookup=this.lookup_queue[i];
+        if (Net.port_cmp(lookup.header.h_port,srvport)) {
+            this.lookup_queue.splice(i,1);
+            this.lookup_cache.splice(i,1);
+            found.push(lookup);
+            //this.pkt_discard(lookup);
+        }
+    }
+    return found;
+};
+
+/** Host to connection link port (route to host) mapping
+ *
+ * @param {port} hostport
+ * @param {port} connport
+ */
+rpcrouter.prototype.add_host = function(hostport,connport) {
+    this.host_mapping[hostport]=connport;
+    this.host_mapping_live[hostport]=PORT_CACHE_MAXLIVE;
+};
+
+/**
+ *
+ * @param {port} hostport
+ */
+rpcrouter.prototype.remove_host = function(hostport) {
+    this.host_mapping[hostport]=undefined;
+    this.host_mapping_live[hostport]=undefined;
+};
+
+/**
+ *
+ * @param {port} hostport
+ * @param {port} connport
+ */
+rpcrouter.prototype.update_host = function(hostport,connport) {
+    this.host_mapping[hostport]=connport;
+    this.host_mapping_live[hostport]=PORT_CACHE_MAXLIVE;
+};
+/** Return the communication port that connects the endpoint of the path to the host.
+ *
+ * @param {port} hostport
+ * @returns {port}
+ */
+rpcrouter.prototype.lookup_host = function(hostport) {
+    var found = this.host_mapping[hostport];
+    if (found!=undefined) this.host_mapping_live[hostport]=PORT_CACHE_MAXLIVE;
+    return found;
+};
+
+/**
+ ** Add a pending host  lookup (find connection link port to host)
+ *
+ *
+ * @param {port} hostport
+ * @returns {rpcio}
+ */
+rpcrouter.prototype.add_hostlookup = function(hostport) {
+    var i,found;
+    found=undefined;
+    for(i in this.lookup_queue) {
+        var lookup=this.lookup_queue[i];
+        if (Net.port_cmp(lookup.sendport,hostport)) found=lookup;
+    }
+    if (!found) {
+        var rpcio=this.pkt_get();
+        rpcio.init(Rpc.Operation.WHEREIS);
+        rpcio.hostport=this.hostport;
+        rpcio.sendport=hostport;
+        rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+        this.lookup_queue.push(rpcio);
+        this.lookup_cache.push([]);
+        found=rpcio;
+    }
+    return found;
+};
+
+/**
+ *
+ * @param {port} hostport
+ */
+rpcrouter.prototype.remove_hostlookup = function(hostport) {
+    var i;
+    var found=[];
+    loop: for(i in this.lookup_queue) {
+        var lookup=this.lookup_queue[i];
+        if (Net.port_cmp(lookup.header.h_port,Net.nilport) &&
+            Net.port_cmp(lookup.sendport,hostport)) {
+            this.lookup_queue.splice(i,1);
+            this.lookup_cache.splice(i,1);
+            found.push(lookup);
+            //this.pkt_discard(lookup);
+        }
+    }
+    return found;
+};
+
+/** Add a connection link to this router.
+ *
+ * @param {rpcconn} conn
+ */
+rpcrouter.prototype.add_conn = function(conn) {
+    this.connections[conn.port]=conn;
+};
+
+/** Remove a connection link.
+ *
+ * @param {rpcconn} conn
+ */
+rpcrouter.prototype.remove_conn = function(conn) {
+    this.connections[conn.port]=undefined;
+};
+
+/** Find a connection link by its connection port.
+ *
+ * @param {port} connport
+ * @returns {rpcconn}
+ */
+rpcrouter.prototype.find_conn = function(connport) {
+    return this.connections[connport];
+};
+
+/** Set default cache table entry timeout
+ *
+ * @param tmo
+ */
+rpcrouter.prototype.set_cachetimeout = function (tmo) {
+    PORT_CACHE_MAXLIVE=tmo;
+};
+
+/** Broadcast a message (e.g., LOOKUP) to all known connection links w/o the
+ *  rpcio.connport link (was the incoming link of rpcio message).
+ *
+ * @param rpcio
+ */
+rpcrouter.prototype.broadcast = function(rpcio) {
+    var self=this,
+        buf,msg,data;
+    for (var i in this.connections) {
+      var conn=self.connections[i];
+      if (conn.alive() && conn.send!=undefined && !Net.Equal.port(conn.port,rpcio.connport)) conn.send(rpcio);
+    }
+    // TWOCHAN message broadcasting?
+    if (this.broker.broadcast) {
+      switch (rpcio.operation) {
+        case Rpc.Operation.LOOKUP:
+          buf = Buf.Buffer();
+          Buf.buf_put_port(buf, rpcio.header.h_port);
+          data = [{rpc:'lookup',hostport:rpcio.hostport,
+                     data:Buf.buf_to_hex(buf)}];
+          msg = {type:'broadcast',data:data};
+          this.broker.broadcast(msg);
+          // console.log(msg)
+          break;
+      }
+    }
+};
+
+/**
+ *
+ * @param rpcio
+ * @param [connport]
+ * @param {function((Status.STD_OK|*),rpcio)} [callback]
+ * @returns {number} status
+ */
+rpcrouter.prototype.forward = function (rpcio,connport,callback) {
+    var self=this;
+    assert((rpcio!=undefined)||('Router.forward: rpcio undefined'));
+    rpcio.hop++;
+    var conn = this.find_conn(connport||rpcio.connport);
+    if (!conn || conn.send==undefined || !conn.alive() || rpcio.hop > rpcio.max) return 0;
+    assert((conn!=undefined)||('Router.forward: invalid connection link '+Net.Print.port(connport||rpcio.connport)));
+    conn.send(rpcio,callback);
+    //Io.log((log<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] Router.forward, cannot forward: connection '+Net.Print.port(connport||rpcio.connport)+'not alive!'))
+    return 1;
+};
+
+/** Swap hostport<->sendport
+ *
+ * @param rpcio
+ */
+rpcrouter.prototype.swapports = function(rpcio) {
+    var tmp = rpcio.hostport;
+    rpcio.hostport=rpcio.sendport;
+    rpcio.sendport=tmp;
+};
+
+
+/**
+ *
+ */
+rpcrouter.prototype.status = function() {
+    var str ='';
+    var nl = '\n';
+    var i;
+    var trans,port,lookup;
+    var used=0;
+    for(i in this.rpcio_pool) {
+        trans = this.rpcio_pool[i];
+        if (trans.index!=-1) used++;
+    }
+
+    str=str+'RPCIO Pool: '+used+'/'+this.rpcio_pool_size+' (next '+this.rpcio_pool_next+', head '+this.rpcio_pool_head+')'+nl;
+    for(i in this.rpcio_pool) {
+        trans = this.rpcio_pool[i];
+        if (trans.index!=-1) {
+            str = str + '  ' + trans.index+': '+Rpc.Operation.print(trans.operation);
+            if (trans.timeout>0) str=str+' tmo='+trans.timeout;
+            if (trans.tid >= 0) str=str+' tid='+trans.tid;
+            if (trans.status) str=str+' status='+Status.print(trans.status);
+            if (trans.context) str=str+' context='+trans.context.id;
+            if (trans.hostport) str=str+' hostport='+Net.Print.port(trans.hostport);
+            if (trans.sendport) str=str+' sendport='+Net.Print.port(trans.sendport);
+            if (trans.connport) str=str+' connport='+Net.Print.port(trans.connport);
+            str = str + ' hop='+trans.hop+'('+trans.hop_max+')';
+            str = str + nl;
+        }
+    }
+
+    str=str+'Connection Port Table: '+nl;
+    for(i in this.connections) {
+        var conn = this.connections[i];
+        str=str+'  '+Net.Print.port(i)+' -> CON('+
+            (conn.send!=undefined?'+SEND ':'')+
+            (conn.alive()?'ALIVE':'DEAD')+
+            (conn.send==undefined?(' GET='+conn.stats.op_get):(' RCV='+conn.stats.op_receive))+
+            (conn.send==undefined?(' PUT='+conn.stats.op_put):(' SND='+conn.stats.op_send))+
+            (conn.send==undefined?(' ALV='+conn.stats.op_alive):(' LNK='+conn.stats.op_link))+
+            (conn.send==undefined?(' FWD='+conn.stats.op_forward):(' PNG='+conn.stats.op_ping))+
+            (conn.send==undefined?(' SCH='+conn.stats.op_schedule):(' POG='+conn.stats.op_pong))+
+            (conn.send==undefined?(' MSG='+conn.stats.op_messages):'')+
+            (conn.send==undefined?(' ENT='+conn.stats.op_noentr):'')+
+            (conn.send==undefined?(' ERR='+conn.stats.op_error):'')+
+            ')'+nl;
+    }
+    str=str+'RPC Server to Host Port Mapping Table: '+nl;
+    for(i in this.port_mapping) {
+        port = this.port_mapping[i];
+        if (port!=undefined)
+            str=str+'  '+Net.Print.port(i)+' -> '+Net.Print.port(port)+' ['+this.port_mapping_live[i]+']'+nl;
+    }
+    str=str+'Host to Connection Port Mapping Table: '+nl;
+    for(i in this.host_mapping) {
+        port = this.host_mapping[i];
+        if (port!=undefined)
+            str=str+'  '+Net.Print.port(i)+' -> '+Net.Print.port(port)+' ['+this.host_mapping_live[i]+']'+nl;
+    }
+    str=str+'Queued RPC Transactions: '+nl;
+    for(i in this.trans_queue) {
+        trans = this.trans_queue[i];
+        str=str+'  '+Net.Print.port(trans.header.h_port)+ ' ['+trans.timeout+'] '+ Net.Command.print(trans.header.h_command)+ nl;
+    }
+    str=str+'Queued RPC Lookups: LQ['+Array.length(this.lookup_queue)+'] LC['+Array.length(this.lookup_cache)+']'+nl;
+    for(i in this.lookup_queue) {
+        lookup = this.lookup_queue[i];
+        if (lookup.operation == Rpc.Operation.LOOKUP)
+            str=str+'  LOOKUP  '+Net.Print.port(lookup.header.h_port)+ ' ['+lookup.timeout+']'+ nl;
+        else
+            str=str+'  WHEREIS '+Net.Print.port(lookup.sendport)+ ' ['+lookup.timeout+']'+ nl;
+    }
+    str=str+'Queued RPC Server Requests: '+nl;
+    for(i in this.req_queue) {
+        trans = this.req_queue[i];
+        str=str+'  '+Net.Print.port(trans.header.h_port)+ ' ['+trans.timeout+']'+ nl;
+    }
+    str=str+nl+'Message Statistics'+nl+'----------------------------------------'+nl;
+    /*
+    op_transreq:0,
+        op_transrep:0,
+        op_getreq:0,
+        op_putrep:0,
+        op_lookup:0,
+        op_whereis:0,
+        op_hereis:0,
+        op_iamhere:0,
+        op_brokerreq:0,
+        op_brokerrep:0,
+        op_brokernoent:0,
+        op_transabort:0,
+        op_lookupabort:0
+    */
+    str=str+Printf.sprintf2([['%20s','TRANSREQ'],':',['%8d',this.stats.op_transreq],'  ',['%20s','TRANSREP'],':',['%8d',this.stats.op_transrep]])+nl;
+    str=str+Printf.sprintf2([['%20s','GETREQ'],':',['%8d',this.stats.op_getreq],'  ',['%20s','PUTREP'],':',['%8d',this.stats.op_putrep]])+nl;
+    str=str+Printf.sprintf2([['%20s','LOOKUP'],':',['%8d',this.stats.op_lookup],'  ',['%20s','IAMHERE'],':',['%8d',this.stats.op_iamhere]])+nl;
+    str=str+Printf.sprintf2([['%20s','WHEREIS'],':',['%8d',this.stats.op_whereis],'  ',['%20s','HEREIS'],':',['%8d',this.stats.op_hereis]])+nl;
+    if (this.brokerconn != undefined) {
+        str = str + Printf.sprintf2([['%20s', 'BROKERREQ'], ':', ['%8d', this.stats.op_brokerreq], '  ', ['%20s', 'BROKERREP'], ':', ['%8d', this.stats.op_brokerrep]]) + nl;
+        str = str + Printf.sprintf2([['%20s', 'BROKERNOENT'], ':', ['%8d', this.stats.op_brokernoent]]) + nl;
+    }
+    str=str+Printf.sprintf2([['%20s','TRANSABORT'],':',['%8d',this.stats.op_transabort],'  ',['%20s','LOOKUPABORT'],':',['%8d',this.stats.op_lookupabort]])+nl;
+    return str;
+};
+
+/**
+** Main entry function for RPC message routing.
+** The calling of the routing function expects an already blocked caller process context
+** except for remote transaction execution.
+ *
+ * The router serves different connection modes:
+ *
+ * 1. Client Router using Broker (supporting only passive receiving)
+ * 2. Client Router using P2P (supporting active sending)
+ * 3. Broker Server (passive or active sending)
+ * 4. Mixed mode: App + Broker
+ *
+ *
+ * @param {rpcio} rpcio
+ */
+rpcrouter.prototype.route = function(rpcio) {
+    var self=this;
+    var trans,body,msg,data,path,buf,rpcio2,
+        i,conn,connport,hostport,hostsrvport,transl,
+        whereis,lookup,lookups,res,rpcios,
+        local,hdr;
+        
+    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] ON ENTRY: '+Rpc.Print.rpcio(rpcio)));
+    Io.trace(trace||('[ROUT] ON ENTRY: '+Rpc.Print.rpcio(rpcio)));
+
+    local = Net.Equal.port(rpcio.hostport,self.hostport);
+
+    hdr=rpcio.header;
+    if (rpcio.hop>rpcio.hop_max) {
+        Io.log((self.verbose<0)||('[ROUT] Discarding RPCIO message with invalid hop count: '+Rpc.Print.rpcio(rpcio)));
+        self.pkt_discard(rpcio);
+        return;
+    }
+    if (rpcio.connport != undefined && rpcio.hostport!=undefined) self.add_host(rpcio.hostport,rpcio.connport);
+
+    switch (rpcio.operation) {
+        case Rpc.Operation.TRANSREQ:
+            self.stats.op_transreq++;
+
+            hostsrvport = self.lookup_port(hdr.h_port);
+
+            if (hostsrvport && Net.port_cmp(hostsrvport,self.hostport)) {
+                Io.log((self.monitor<1)||('[ROUT] TRANSREQ: local RPC server, local (or remote) RPC client!'));
+                /******************************************
+                ** Local RPC Server AND (Local OR Remote Transaction)!
+                ******************************************/
+                // Check for local ready servers
+                rpcios = self.lookup_service(
+                    hdr.h_port,rpcio,
+                    function(reply) {
+                        // Transfer header and data from server rpcio to client rpcio
+                        if (rpcio.status==undefined) rpcio.status=Status.STD_OK; // RPC succeeded, right?
+
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Servicing reply callback srvport='+
+                                         Net.Print.port(rpcio.header.h_port)+' tid='+rpcio.tid));
+                        Io.log((self.monitor<1)||('[ROUT] TRANSREQ: '+Rpc.Print.rpcio(rpcio)));
+
+                        Net.Copy.header(reply.header,rpcio.header);
+                        Buf.buf_copy(rpcio,reply);
+                        // Remote transaction? Send reply to broker back...
+                        if (rpcio.context != undefined) {
+                            // Local request already served,
+                            // now unblock and schedule the client
+                            Sch.Wakeup(rpcio.context);
+                            Sch.ScheduleNext();
+                        } else {
+                            /*
+                            ** Remote transaction
+                            *  1. Forwarded by a connection link
+                            *  2. Handled by the broker
+                            */
+                            // Swap host- and sendports, update hostport with this hostport!
+                            var tmp = rpcio.hostport;
+                            rpcio.hostport=self.hostport;
+                            rpcio.sendport=tmp;
+                            rpcio.operation=Rpc.Operation.TRANSREP;
+                            rpcio.hop=0;
+                            self.route(rpcio);
+                        }
+                        // do not pkt_discard(reply)! It comes from outside of the router
+                    });
+                if (rpcios!=undefined) {
+                    // Found server, servers rpcio is already updated, now wake-up server process...
+                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Being serviced for host '+
+                                     Net.Print.port(rpcio.hostport)+': srv='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                    Sch.Wakeup(rpcios.context);
+                    Sch.ScheduleNext();
+                } else {
+                    // actually no server available, wait ...
+                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Suspend client for host '+
+                                     Net.Print.port(rpcio.hostport)+': srv='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                    rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                    self.add_trans(rpcio);
+                }
+            } else if (self.brokerconn && self.brokerconn.status==Net.Status.STD_OK) {
+                /*
+                ***********************************
+                ** Client-App. with Broker connection
+                ***********************************
+                ** A local transaction request from HERE to be sent to a remote server by using the broker.
+                ** TRANSREQ must be forwarded to the broker and finally to the RPC server.
+                ** Check rpcio.hostport==this.hostport to avoid message ping-pong loops between broker and this node.
+                ** The broker thinks the server is here, we received the message, but it is no longer here.
+                ** We do no message forwarding here.
+                */
+                if (Net.Equal.port(rpcio.hostport,self.hostport)) {
+                    /*
+                     **
+                     ** Application client mode: transaction AND server lookup must be handled by broker server
+                     */
+                    data = rpcio.to_json('simple');
+                    Io.log((self.monitor < 1) || ('[ROUT'+(timestamp?Perv.mtime():'')+
+                                                  '] TRANSREQ: Sending message to broker for RPC server ' + 
+                                                  Net.Print.port(hdr.h_port) + ' tid ' + rpcio.tid));
+                    // Wait for reply, do nothing, add this transaction again to transaction queue
+                    Io.log((self.monitor < 1) || ('[ROUT] TRANSREQ: Await, client waiting for reply from RPC server ' + 
+                                                  Net.Print.port(hdr.h_port) + ' tid ' + rpcio.tid));
+                    rpcio.operation = Rpc.Operation.TRANSAWAIT;
+                    rpcio.timeout = Sch.GetTime() + Net.TIMEOUT;
+                    self.add_trans(rpcio);
+                    msg = {rpc:'trans',hostport:self.hostport,tid:rpcio.tid,data:data};
+                    self.brokerconn.send(msg, function (reply) {
+                        if (reply.status=='EWOULDBLOCK') {
+                          // Expected
+                        } else if (reply.status=='EINVALID') {
+                            Perv.failwith('[ROUT] TRANSREQ broker HTTP PUT request returns unexpected reply:'+util.inspect(rpcio)+
+                                          ', got'+reply);
+                        } else {
+                            // Cancel transaction!
+                        }
+                    });
+                } else {
+                    Io.warn('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: not from here ('+Net.Print.port(rpcio.hostport)+'), discard it: '+Net.Print.header(rpcio.header));
+                    self.pkt_discard(rpcio);
+                }
+            } else if (this.brokerconn) {
+                /*
+                ***********************************
+                ** Client-App. with Broker connection
+                ***********************************
+                ** Just put it in the transaction queue.
+                ** Queue transaction due to lost broker connection!
+                ** Must be forwarded later...
+                */
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queuing transaction due to lost broker connection from host '+
+                                 Net.Print.port(rpcio.hostport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid+ ' for host'+
+                                 Net.Print.port(hostsrvport)));
+                rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                self.add_trans(rpcio);
+            } else {
+                /*
+                 **************************
+                 ** Client-App. with P2P connection and / or broker
+                 **************************
+                 ** Just put it in the transaction queue.
+                 ** 1. A client app. (the RPC server) must request the transaction for further processing (from broker server).
+                 ** 2. If the server port is actually unknown, start lookup(srvport)
+                 *  3. The server is located on another P2P-App. host (node), locate server, forward message. TODO
+                 */
+                if (local && hostsrvport==undefined) {
+                    hostsrvport=self.lookup_port(hdr.h_port);
+                    if (hostsrvport==undefined) {
+                        Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREQ: Doing lookup for srvport=' + Net.Print.port(hdr.h_port)));
+                        lookup = this.new_lookup(hdr.h_port);
+                        this.route(lookup);
+                    } else {
+                        rpcio.sendport=hostsrvport;
+                    }
+                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queuing (local) transaction from host '+
+                        Net.Print.port(rpcio.hostport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                    if (Net.Equal.port(rpcio.hostport,this.hostport)) {
+                        // Local transaction client, remote server, pending lookup
+                        // rpcio.operation = Rpc.Operation.TRANSAWAIT;
+                    }
+                    rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                    self.add_trans(rpcio);
+                } else if (local && hostsrvport!=undefined) {
+                    // Queuing and Forwarding (local) transaction 
+                    connport = self.lookup_host(hostsrvport);
+                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queuing and Forwarding (local) transaction from host '+
+                        Net.Print.port(rpcio.hostport) +' to host '+
+                        Net.Print.port(hostsrvport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid+
+                        ' on connection port '+Net.Print.port(connport)));
+                    rpcio.sendport=hostsrvport;
+                    if (connport!=undefined) res=self.forward(rpcio, connport);
+                    rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                    rpcio.operation=Rpc.Operation.TRANSAWAIT;
+                    self.add_trans(rpcio);
+                } else if (rpcio.sendport != undefined) {
+                    // Discarding or Queuing or Forwarding transaction 
+                    connport = self.lookup_host(rpcio.sendport);
+                    if (rpcio.hop>=rpcio.hop_max) {
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Discarding transaction (hop count reached) from host '+
+                            Net.Print.port(rpcio.hostport)+' to host '+
+                            Net.Print.port(rpcio.sendport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                        res=1;
+                        self.pkt_discard(rpcio);
+                    }
+                    else if (connport!=undefined) {
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Forwarding transaction from host '+
+                            Net.Print.port(rpcio.hostport)+' to host '+
+                            Net.Print.port(rpcio.sendport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid+
+                            ' on connection port '+Net.Print.port(connport)));
+                        res=self.forward(rpcio, connport, function (stat,rpcio) {self.pkt_discard(rpcio)});
+                    }
+                    else if (!connport) {
+                        /*
+                         ** Look-up host port (WHEREIS)!!
+                         */
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queueing and doing host lookup for sendport='+Net.Print.port(rpcio.sendport)));
+                        whereis = self.add_hostlookup(rpcio.sendport);
+                        rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                        self.add_trans(rpcio);
+                        self.route(whereis);
+                    }
+                    if (res==0) {
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queuing transaction from host '+
+                                Net.Print.port(rpcio.hostport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                        rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                        self.add_trans(rpcio);
+                    }
+                } else {
+                    // Broker-app RPC client
+                    hostsrvport=self.lookup_port(hdr.h_port);
+                    conn=undefined;
+                    if (hostsrvport==undefined) {
+                        Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREQ: Doing lookup for srvport=' + Net.Print.port(hdr.h_port)));
+                        lookup = this.new_lookup(hdr.h_port);
+                        this.route(lookup);
+                    } else {
+                        rpcio.sendport=hostsrvport;
+                        connport = self.lookup_host(rpcio.sendport);
+                        if (connport) conn = self.find_conn(connport);
+                    }
+
+
+                    if (conn && conn.alive() && conn.send != undefined) {
+                        if (rpcio.hop>=rpcio.hop_max) {
+                            Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Discarding transaction (hop count reached) from host '+
+                                Net.Print.port(rpcio.hostport)+' to host '+
+                                Net.Print.port(rpcio.sendport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                            res=1;
+                            self.pkt_discard(rpcio);
+                        } else {
+                            // Remote RPC server, forward transaction
+                            Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREQ: Forwarding transaction from host ' +
+                                Net.Print.port(rpcio.hostport) + ' to host ' +
+                                Net.Print.port(rpcio.sendport) + ': srvport=' + Net.Print.port(hdr.h_port) + ' tid=' + rpcio.tid +
+                                ' on connection port ' + Net.Print.port(connport)));
+                            res = self.forward(rpcio, connport, function (stat, rpcio) {
+                                self.pkt_discard(rpcio)
+                            });
+                        }
+                    } else {
+                        // Broker-app RPC server?
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREQ: Queuing transaction from host '+
+                            Net.Print.port(rpcio.hostport)+': srvport='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                        if (Net.Equal.port(rpcio.hostport,this.hostport)) {
+                            // Local transaction client, remote server, pending lookup
+                            // rpcio.operation = Rpc.Operation.TRANSAWAIT;
+                        }
+                        rpcio.timeout = Sch.GetTime() + Net.TIMEOUT;
+                        self.add_trans(rpcio);
+                    }
+                }
+
+            }
+            break;
+
+        case Rpc.Operation.TRANSREP:
+            self.stats.op_transrep++;
+            Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREP: for host='+
+                Net.Print.port(rpcio.sendport)+' RPC server='+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+            if (rpcio.sendport && Net.Equal.port(rpcio.sendport,self.hostport)) {
+                /************************************
+                 ** Local RPC Client, remote Server!
+                 ************************************
+                 ** Remote reply for local waiting transaction process
+                 */
+                // lookup matching TRANSAWAIT rpcio...
+
+                trans = self.lookup_trans_await(rpcio.header.h_port, rpcio.tid, rpcio);
+                Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREP: Matching transaction ' + Rpc.Print.rpcio(trans)));
+                if (trans) {
+                    trans.status = rpcio.status || trans.header.h_status;
+                    trans.operation=Rpc.Operation.TRANSREP;
+                    if (trans.callback) trans.callback(trans); else {
+                        Sch.Wakeup(trans.context);
+                        Sch.ScheduleNext();
+                    }
+                    self.pkt_discard(rpcio);
+                } else {
+                    // Sent by the garbage collector?
+                    if (rpcio.callback) {
+                        rpcio.callback(rpcio);
+                        if (rpcio.index!=-1) self.pkt_discard(rpcio);
+                    }
+                    else if (rpcio.context && Sch.IsBlocked(rpcio.context)) {
+                        // Usually the context process will release the package!
+                        Sch.Wakeup(rpcio.context);
+                        Sch.ScheduleNext();
+                    }
+                }
+
+            } else if (this.brokerconn && this.brokerconn.status==Net.Status.STD_OK) {
+                /*
+                 ************************************************
+                 ** Client-App. with Broker conenction, Local Server
+                 ************************************************
+                 ** Send transaction reply to broker
+                 */
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] TRANSREP: Sending reply to broker for '+
+                                 Net.Print.port(rpcio.sendport)+': '+Net.Print.port(hdr.h_port)+' tid='+rpcio.tid));
+                data = rpcio.to_json('simple');
+                msg = {rpc:'reply',hostport:rpcio.hostport,sendport:rpcio.sendport,
+                       tid:rpcio.tid, data:data}
+                self.brokerconn.send(msg);
+                self.pkt_discard(rpcio);
+            } else if (!this.brokerconn) {
+                /*
+                 **************************
+                 ** Client-App. with P2P connection or this is Broker
+                 **************************
+                 **
+                 ** 1a. We are the broker: Queue transaction reply for a Client-app RPC client (!broker.forward)
+                 ** 1b. We are the broker: Forward transaction reply to a Client-app RPC client (broker.forward)
+                 ** 2. The server is located on another P2P-App. host (node), forward reply message.
+                 ** 3. The server is here, forward reply message.
+                 */
+                if (rpcio.hop == 0) {
+                    // Reply from here, set-up rpcio for forwarding...
+                    rpcio.connport = undefined;
+                }
+                
+                res = 0;
+
+                if (this.broker.forward) {
+                  data = rpcio.to_json('extended');
+                  msg = {rpc:'reply',hostport:rpcio.hostport,sendport:rpcio.sendport,
+                         tid:rpcio.tid, data:data}
+                  res = this.broker.forward(msg);
+                }
+                if (res == 0) {
+                  connport = self.lookup_host(rpcio.sendport);
+                  if (connport) {
+                    // P2P
+                    conn = self.find_conn(connport);
+                    if (conn.send != undefined) {
+                        Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREP: Forwarding reply to source host ' +
+                            Net.Print.port(rpcio.sendport) +
+                            ' on connection port ' +
+                            Net.Print.port(connport)));
+                        if (rpcio.hop < rpcio.hop_max && !Net.Equal.port(connport, rpcio.connport)) {
+                            res = self.forward(rpcio, connport, function (stat, rpcio) {
+                                self.pkt_discard(rpcio)
+                            });
+                        } else {
+                            res = 1;
+                            self.pkt_discard(rpcio);
+                        }
+                    } // else queue it!
+                  } else {
+                    if (rpcio.hop < rpcio.hop_max) {
+                        /*
+                         ** Look-up host port (WHEREIS)!!
+                         */
+                        res = 1;
+                        Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREP: Doing WHEREIS and Queuing transaction reply'));
+                        rpcio.timeout = Sch.GetTime() + Net.TIMEOUT;
+                        this.add_trans(rpcio);  // will wake up pending transaction request (this.event() -> connection.schedule)
+                        whereis = self.add_hostlookup(rpcio.sendport);
+                        self.route(whereis);
+                    } else {
+                        res = 1;
+                        self.pkt_discard(rpcio);
+                    }
+                  }
+                }
+                if (res == 0) {
+                    Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] TRANSREP: Queuing transaction reply for Broker-App [tid='+rpcio.tid+
+                           ']'));
+                    rpcio.timeout = Sch.GetTime() + Net.TIMEOUT;
+                    this.add_trans(rpcio);  // will wake up pending transaction request (this.event() -> connection.schedule)
+                }
+
+            }
+            break;
+
+        case Rpc.Operation.GETREQ:
+            self.stats.op_getreq++;
+            this.add_port(rpcio.pubport);
+            trans = this.lookup_trans(rpcio.pubport,rpcio);
+            if (trans != undefined) {
+                // Matching and pending transaction found, service the request immed. ...
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] GETREQ: Servicing trans '+Net.Print.port(rpcio.pubport)+' tid '+trans.tid));
+                Sch.SetBlocked(false);
+            } else {
+                // After a TRANS request was received, this process will be woken up by lookup_service and the scheduler!
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] GETREQ: Waiting '+Net.Print.port(rpcio.pubport)));
+                this.add_service(rpcio);
+            }
+            break;
+
+        case Rpc.Operation.PUTREP:
+            self.stats.op_putrep++;
+            if (rpcio.callback != undefined) {
+                // local transaction, client will be unblocked in callback!
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] PUTREP: Servicing reply callback '+Net.Print.port(rpcio.pubport)+' tid '+rpcio.tid));
+                rpcio.callback(rpcio);
+                rpcio.callback=undefined;
+            } else {
+                // transaction managed by broker
+            }
+            Sch.SetBlocked(false);
+            break;
+
+        case Rpc.Operation.LOOKUP:
+            self.stats.op_lookup++;
+
+            if (!this.brokerconn) {
+                hostsrvport = undefined;
+                hostsrvport = this.lookup_port(hdr.h_port);
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] LOOKUP RPC Server port ' +
+                    Net.Print.port(hdr.h_port) + ' -> Host port? ' +
+                    Net.Print.port(hostsrvport)));
+                /*
+                 **************************
+                 ** Client-App. with P2P connection or Broker
+                 **************************
+                 **
+                 ** We are the broker or a P2P-APP:
+                 *  1. Check RPC server port, is it here?
+                 *  2. Broadcast lookup to all known links of connected hosts excluding the incoming link port
+                 *
+                 */
+                 if (hostsrvport != undefined) {
+                    /*
+                     ** Send back an IAMHERE message
+                     */
+                    Io.log((self.monitor < 1) || ('[ROUT' + (timestamp ? Perv.mtime() : '') + '] LOOKUP: Sending IAMHERE reply to host ' +
+                        Net.Print.port(rpcio.hostport) + ' for RPC server ' + Net.Print.port(hdr.h_port)));
+                    rpcio.operation = Rpc.Operation.IAMHERE;
+                    rpcio.hop = 0;
+                    rpcio.sendport = rpcio.hostport;
+                    rpcio.hostport = hostsrvport;
+                    res = self.forward(rpcio, undefined, function (stat, rpcio) {
+                        self.pkt_discard(rpcio);
+                    });
+                } else if (hostsrvport==undefined && rpcio.hop < rpcio.hop_max) {
+                    /*
+                    ** Broadcast message...
+                     */
+                    rpcio.hop++;
+                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] LOOKUP: Broadcasting LOOKUP from host '+
+                        Net.Print.port(rpcio.hostport)+' for RPC server '+Net.Print.port(hdr.h_port)));
+                    self.broadcast(rpcio);
+                    // Maybe we have client-app hosts connected to the broker server, we must add the lookup message to the pending queue!!!
+                    if (!local && !self.brokerserver) self.pkt_discard(rpcio);
+                    else if (self.brokerserver) {
+                        rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                        self.add_lookup(rpcio);
+                    }
+                }
+            }
+            break;
+
+        case Rpc.Operation.WHEREIS:
+            self.stats.op_whereis++;
+            if (Net.Equal.port(rpcio.sendport,self.hostport)) {
+                /*
+                 ** Send back an HEREIS message
+                 */
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] WHEREIS: Sending HEREIS reply to '+
+                    Net.Print.port(rpcio.hostport)));
+                rpcio.operation = Rpc.Operation.HEREIS;
+                rpcio.hop = 0;
+                rpcio.sendport = rpcio.hostport;
+                rpcio.hostport = self.hostport;
+                res=self.forward(rpcio, undefined, function () {
+                    self.pkt_discard(rpcio);
+                });
+            } else if (rpcio.hop < rpcio.hop_max) {
+                // Broadcast message to all connections w/o incoming connection
+                rpcio.hop++;
+                self.broadcast(rpcio);
+                if (!local && !self.brokerserver) self.pkt_discard(rpcio);
+                else if (self.brokerserver) {
+                    rpcio.timeout=Sch.GetTime()+Net.TIMEOUT;
+                    self.add_lookup(rpcio);
+                }
+            }
+            break;
+
+        case Rpc.Operation.IAMHERE:
+            self.stats.op_iamhere++;
+            if (this.brokerconn && this.brokerconn.status==Net.Status.STD_OK) {
+                /*
+                 **************************
+                 ** Client-App. with Broker connection
+                 **************************/
+
+                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Sending reply to broker from host port '+
+                    Net.Print.port(rpcio.hostport)+' for RPC server port '+Net.Print.port(hdr.h_port)));
+                // path = '/?rpc=iamhere&hostport='+Net.port_to_str(rpcio.hostport)+'&srvport='+Net.port_to_str(rpcio.header.h_port);
+                msg = {rpc:'iamhere',hostport:rpcio.hostport,srvport:rpcio.header.h_port};
+                self.brokerconn.send(msg,function () {});
+                // self.brokerconn.get(path,function () {});
+                self.pkt_discard(rpcio);
+            } else if (!this.brokerconn) {
+                /*
+                 **************************
+                 ** Client-App. or Broker with P2P connection
+                 **************************
+                 */
+                // TODO
+                if (rpcio.connport!=undefined) {
+                    // original host port
+                    hostport=rpcio.hostport;
+                    if (Net.Equal.port(rpcio.sendport,self.hostport)) {
+                        /*
+                        ** 1. Destination reached, it is for this host.
+                        *  2. We are the broker server: Stalled broker client transaction lookup
+                        *  2. We are the broker server: Pending lookup from another host and reply from a broker client
+                        */
+                        self.add_port(rpcio.header.h_port,rpcio.hostport);
+                        transl = self.find_all_trans(rpcio.header.h_port);
+                        for(i in transl) {
+                            trans=transl[i];
+                            if (trans.operation==Rpc.Operation.TRANSREQ) {
+                                trans.sendport = rpcio.hostport;
+                                if (Net.Equal.port(trans.hostport,self.hostport)) {
+                                    // Local transaction client, TRANSREQ already queued
+                                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Forwarding transaction from host '+
+                                        Net.Print.port(trans.hostport)+' to host '+Net.Print.port(trans.sendport)+': srvport='+
+                                        Net.Print.port(trans.header.h_port)+' tid='+trans.tid+
+                                        ' on connection port '+Net.Print.port(rpcio.connport)));
+                                    res=self.forward(trans, rpcio.connport);
+                                    trans.operation = Rpc.Operation.TRANSAWAIT;
+                                } else {
+                                    // Routing only
+                                    conn=self.find_conn(rpcio.connport);
+console.log(rpcio)
+                                    if (conn && conn.send==undefined) {
+                                        // Keep transaction queued for Client-App RPC Server
+                                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Keeping transaction queued from host '+
+                                            Net.Print.port(trans.hostport)+': srvport='+Net.Print.port(trans.header.h_port)+' tid='+trans.tid));
+                                    } else {
+                                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Forwarding transaction from host '+
+                                            Net.Print.port(trans.hostport)+' to host '+Net.Print.port(trans.sendport)+': srvport='+
+                                            Net.Print.port(trans.header.h_port)+' tid='+trans.tid+
+                                            ' on connection port '+Net.Print.port(rpcio.connport)));
+                                        self.remove_trans(trans);
+                                        res = self.forward(trans, rpcio.connport, function (stat, rpcio) {
+                                            self.pkt_discard(rpcio)
+                                        });
+                                        if (res == 0) {
+                                            // ??
+
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                        /*
+                        ** Check pending LOOKUP messages and forward IAMHERE message...
+                         */
+                        lookups = self.remove_lookup(rpcio.header.h_port);
+                        for (i in lookups) {
+                            // stalled lookups
+                            lookup=lookups[i];
+                            if (lookup.connport != undefined) {
+                                conn=self.find_conn(lookup.connport);
+                                if (conn && conn.alive() && conn.send != undefined) {
+                                    // Forward message...
+                                    lookup.operation=Rpc.Operation.IAMHERE;
+                                    lookup.sendport=lookup.hostport;
+                                    lookup.hostport=hostport;
+                                    Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Forwarding IAMHERE from host '+
+                                        Net.Print.port(lookup.hostport)+' to host '+
+                                        Net.Print.port(lookup.sendport)+' on port '+
+                                        Net.Print.port(lookup.connport)));
+                                    lookup.hop=0;
+                                    res=self.forward(lookup,lookup.connport,function(stat,rpcio){self.pkt_discard(rpcio);});
+                                } else self.pkt_discard(lookup);
+                            } else self.pkt_discard(lookup);
+                        }
+                        self.pkt_discard(rpcio);
+                    } else {
+                        // Forward message...
+                        connport=self.lookup_host(rpcio.sendport);
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] IAMHERE: Forwarding IAMHERE from host '+
+                                            Net.Print.port(rpcio.hostport)+' to host '+Net.Print.port(rpcio.sendport)+' on port '+Net.Print.port(connport)));
+                        if (connport && !Net.Equal.port(connport,rpcio.connport) &&
+                            rpcio.hop<rpcio.hop_max) res=self.forward(rpcio,connport,function(stat,rpcio){self.pkt_discard(rpcio);});
+                        else self.pkt_discard(rpcio);
+                        lookups = self.remove_lookup(rpcio.header.h_port);
+                        for (i in lookups) {
+                            // stalled lookups
+                            lookup = lookups[i];
+                            self.pkt_discard(lookup);
+                        }
+                    }
+                }
+            }
+            break;
+
+        case Rpc.Operation.HEREIS:
+            self.stats.op_hereis++;
+            if (!this.brokerconn) {
+                if (rpcio.connport!=undefined) {
+
+                    if (Net.Equal.port(rpcio.sendport,self.hostport)) {
+                        // Destination reached, it is for this host.
+                        lookups=self.remove_hostlookup(rpcio.hostport);
+                        Array.iter(lookups,function(rpcio){self.pkt_discard(rpcio)});
+                        do {
+                            trans = self.lookup_trans_for_host(rpcio.hostport);
+                            if (trans) {
+                                Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] HEERIS: Forwarding transaction from host '+
+                                    Net.Print.port(trans.hostport)+' to host '+Net.Print.port(trans.sendport)+': srvport='+
+                                    Net.Print.port(trans.header.h_port)+' tid='+trans.tid+
+                                    ' on connection port '+Net.Print.port(rpcio.connport)));
+                                if (Net.Equal.port(trans.hostport,self.hostport)) {
+                                    // Local transaction client
+                                    res=self.forward(trans, rpcio.connport);
+                                    trans.operation = Rpc.Operation.TRANSAWAIT;
+                                } else {
+                                    // Routing only
+                                    self.remove_trans(trans);
+                                    res=self.forward(trans, rpcio.connport,function (stat,rpcio) {self.pkt_discard(rpcio)});
+                                }
+
+                            }
+                        } while (trans != undefined);
+                        self.pkt_discard(rpcio);
+                    } else {
+                        // Forward message...
+                        conn=self.lookup_host(rpcio.sendport);
+                        Io.log((self.monitor<1)||('[ROUT'+(timestamp?Perv.mtime():'')+'] Forward HEREIS from host '+
+                            Net.Print.port(rpcio.hostport)+' to host '+Net.Print.port(rpcio.sendport)+' on port '+Net.Print.port(conn)));
+                        if (conn && !Net.Equal.port(conn,rpcio.connport) &&
+                            rpcio.hop<rpcio.hop_max) res=self.forward(rpcio,conn,function(stat,rpcio){self.pkt_discard(rpcio);});
+                        else self.pkt_discard(rpcio);
+                    }
+                }
+            }
+            break;
+
+    }
+};
+
+
+/**
+ *
+ */
+rpcrouter.prototype.init = function() {
+    this.rpcio_pool=[];
+    this.rpcio_pool_head=0;
+    this.rpcio_pool_next=-1;
+    for (var i=0;i<CHUNK_SIZE;i++)  this.rpcio_pool.push(Rpc.Rpcio());
+    Io.log((this.monitor<1)||('[ROUT] My host port is '+Net.Print.port(this.hostport)));
+};
+
+/** Parse a received message
+ *
+ */
+rpcrouter.prototype.parse = function (reply) {
+  var i,rpc,rpcio,res,mysrv,
+      routed=0,
+      self=this;
+//console.log(reply)
+  if (reply.data==undefined) return 0;
+  if (!Obj.isArray(reply.data)) reply.data=[reply.data];
+  
+  for (i in reply.data) {
+     rpc = reply.data[i];
+     if (!rpc.operation) switch (rpc.rpc) {
+      case ('lookup') : rpc.operation='LOOKUP'; break;
+     }
+     if (self.brokerconn) self.brokerconn.rpccon.stats.op_messages++;
+
+     rpcio = self.pkt_get();
+     res=rpcio.of_json(rpc);
+//console.log(rpc)
+     if (res==0) {
+       self.pkt_discard(rpcio);
+       rpcio=undefined;
+     }
+     else if (rpcio.operation == Rpc.Operation.TRANSREQ) {
+       if (rpcio.sendport==undefined) rpcio.sendport = self.hostport; // Nothing to-do?
+     }
+     else if (rpcio.operation == Rpc.Operation.TRANSREP) {
+       // Nothing to-do?
+     } else if (rpcio.operation == Rpc.Operation.LOOKUP) {
+       self.stats.op_lookup++;
+       mysrv = self.lookup_port(rpcio.header.h_port);
+       Io.log((self.monitor<1)||('[ROUH'+(timestamp?Perv.mtime():'')+
+             '] LOOKUP RPC port ' +Net.Print.port(rpcio.header.h_port) + ' -> Host port ' +Net.Print.port(mysrv)));
+       if (mysrv) {
+           rpcio.operation= Rpc.Operation.IAMHERE;
+           rpcio.sendport = rpcio.hostport;
+           rpcio.hostport = self.hostport
+       } else {
+           self.pkt_discard(rpcio);
+           rpcio=undefined;
+       }
+     }
+     Io.log((self.monitor<10)||('[ROUH] Broker Service: received ' + Rpc.Print.rpcio(rpcio)));
+     Io.trace(trace||('[ROUH] Broker Service: received ' + Rpc.Print.rpcio(rpcio)));
+     if (rpcio) { routed++; self.route(rpcio);}
+  }
+  return routed;
+}
+
+/**
+ ** 1. Start a broker service handler (client-side appl.)
+ ** 2. Start a garbage collector service handler
+ *
+ * @param {number} [interval]
+ */
+rpcrouter.prototype.start = function (interval) {
+    var self=this;
+    var rpcio,i;
+
+    if (!interval) interval=100;
+
+    var step=interval/20;
+
+    if (this.brokerconn != undefined && this.brokerconn.service != undefined) {
+        self.brokerconn.pending=0;
+        Io.log((self.monitor<1)||('[ROUT] Starting broker request service '));
+        // Install broker service handler
+        Sch.AddTimer(interval, 'RPC broker service', function (context) {
+            Io.log((self.monitor<3)||('[ROUH] broker.service run '+Status.print(self.brokerconn.status)+ ' '+ self.brokerconn.pending));
+
+            if (self.brokerconn.status==Net.Status.STD_OK && self.brokerconn.pending<=0) {
+                var timeout=interval*10;
+                self.brokerconn.pending=timeout;
+                Io.log((self.monitor<2)||('[ROUH] REQ...'));
+                Io.trace(trace||('[ROUH] REQ...'));
+                /*
+                 ** Check for available TRANS messages for THIS application identified by the app. port (name..) ...
+                 ** The broker request is blocked until RPC transactions are available or a timeout occurred.
+                 */
+                self.brokerconn.service({hostport:self.hostport,timeout:timeout},function (reply) {
+                  var  msg,rpc,i,res;
+                  self.stats.op_brokerrep++;
+                  self.brokerconn.pending=0;
+//console.log(reply)                  
+                  if (reply.status=='EINVALID') {
+                    // Not a valid reply, communication error or wrong server.
+                    self.stats.op_error++;
+                    self.brokerconn.rpccon.stats.op_error++;
+                    Io.out('[ROUH] Received invalid HTTP message w/o data');                  
+                  } else if (reply.status!='ENOENTR') {
+                      /*
+                       ** We can get more than one message contained in the reply: <xml><rpc>..</rpc><rpc>..</rpc>..</xml>
+                       ** including lookup/WHOIS messages
+                       */  
+                      self.parse(reply);
+                      // Force new execution of this handler immediately
+                      Sch.Wakeup(context);
+                      context.timer=Sch.time;
+                      Sch.ScheduleNext();
+                      
+                  } else {
+                      self.stats.op_brokernoent++;
+                      self.brokerconn.rpccon.stats.op_noentr++;
+                      // callback('ENOENTR');
+                      // Force new execution of this handler immediately
+                      Sch.Wakeup(context);
+                      context.timer=Sch.time;
+                      Sch.ScheduleNext();
+                  }
+                });
+            } else if (self.brokerconn.status!=Net.Status.STD_OK)  self.brokerconn.pending=0;
+              else if (self.brokerconn.pending>0) self.brokerconn.pending=self.brokerconn.pending-step;
+        })
+    }
+    // Install a garbage collector service
+    Sch.AddTimer(interval, 'RPC Garbage Collector and Timeout Service', function () {
+        var i,remove,trans,lookup,cache,entry,key,live,time,
+            lookups=[],
+            caches=[],
+            transactions=[],
+            routing=[],
+            hostport;
+            
+        Io.log((self.monitor<4)||('[ROUG] garbage collector run'));
+        // TODO Locking!!!!
+        time=Sch.GetTime();
+        /*
+        ** Pending look-up requests...
+         */
+        for(i in self.lookup_queue) {
+            lookup=self.lookup_queue[i];
+            cache=self.lookup_cache[i];
+            remove=false;
+            if (lookup.timeout > 0 && lookup.timeout <= time) {
+                // remove lookup entry, no response
+                self.stats.op_lookupabort++;
+                remove=true;
+                self.pkt_discard(lookup);
+                if (lookup.operation == Rpc.Operation.LOOKUP)
+                    Io.log((self.verbose<1)||('[ROUG] garbage collector: removing lookup (LOOKUP) for RPC server '+Net.Print.port(lookup.header.h_port)));
+                else
+                    Io.log((self.verbose<1)||('[ROUG] garbage collector: removing lookup (WHERIS) for host '+Net.Print.port(lookup.sendport)));
+            }
+            if (!remove) {
+                lookups.push(lookup);
+                caches.push(cache);
+            }
+        }
+        self.lookup_queue=lookups;
+        self.lookup_cache=caches;
+        /*
+        ** Pending transactions...
+         */
+        for(i in self.trans_queue) {
+            trans=self.trans_queue[i];
+            remove=false;
+            // TODO: check for successfull server lookups and forward matching transactions... !?
+            
+            if (trans.timeout > 0 && trans.timeout <= time) {
+                self.stats.op_transabort++;
+                // Reduce port and host mapping cache lifetimes
+                hostport=self.port_mapping[trans.header.h_port];
+                if (hostport) {
+                  self.port_mapping_live[trans.header.h_port]=1;
+                  if (self.host_mapping[hostport]) self.host_mapping_live[hostport]=1;
+                }
+                
+                // remove transaction entry, no response, deliver RPC_FAILURE
+                if (trans.operation == Rpc.Operation.TRANSAWAIT) {
+                    trans.header.h_status =  Net.Status.RPC_FAILURE;
+                    trans.status = Net.Status.RPC_FAILURE;
+                    trans.operation = Rpc.Operation.TRANSREP;
+                    self.swapports(trans);
+                    Buf.buf_init(trans);
+                    Buf.buf_put_string(trans,'<status>RPC_FAILURE</status>');
+                    if (trans.context) {
+                        Sch.Wakeup(trans.context);
+                        Sch.ScheduleNext();
+                    }
+                    remove = true;
+                    Io.log((self.verbose<1)||('[ROUG] garbage collector: aborting local transaction to RPC server ' +
+                                     Net.Print.port(trans.header.h_port) + ' tid=' + trans.tid));
+                } else if (trans.operation == Rpc.Operation.TRANSREQ) {
+                    trans.header.h_status = Net.Status.RPC_FAILURE;
+                    trans.status = Net.Status.RPC_FAILURE;
+                    trans.operation = Rpc.Operation.TRANSREP;
+                    self.swapports(trans);
+                    Buf.buf_init(trans);
+                    Buf.buf_put_string(trans,'<status>RPC_FAILURE</status>');
+                    trans.timeout=Sch.GetTime()+Net.TIMEOUT;
+                    remove = true;
+                    routing.push(trans);
+                    Io.log((self.verbose<1)||('[ROUG] garbage collector: removing remote transaction (TRANSREQ) to RPC server ' +
+                                     Net.Print.port(trans.header.h_port) + ' tid=' + trans.tid));
+                } else if (trans.operation == Rpc.Operation.TRANSREP) {
+                    remove = true;
+                    self.pkt_discard(trans);
+                    Io.log((self.verbose<1)||('[ROUG] garbage collector: removing transaction reply (TRANSREP) from RPC server ' +
+                                     Net.Print.port(trans.header.h_port) + ' tid=' + trans.tid));
+                }
+            }
+
+            if (!remove) transactions.push(trans);
+        }
+        self.trans_queue=transactions;
+
+        /*
+        ** Garbage collection of look-up tables (hash tables)
+        */
+        for (key in self.port_mapping) {
+            if (!Net.Equal.port(self.port_mapping[key],self.hostport)) {
+                live = self.port_mapping_live[key];
+                if (live == 0) {
+                    self.port_mapping_live[key] = undefined;
+                    self.port_mapping[key] = undefined;
+                } else if (live > 0) self.port_mapping_live[key]--;
+            }
+        }
+        for (key in self.host_mapping) {
+            live = self.host_mapping_live[key];
+            if (live==0) {
+                if (self.verbose>0) 
+                  Io.out('[ROUG] Removing host '+Net.Print.port(key));
+                self.host_mapping_live[key]=undefined;
+                self.host_mapping[key]=undefined;
+            } else self.host_mapping_live[key]--;
+        }
+
+        for (i in routing) {
+            trans=routing[i];
+            self.route(trans);
+        }
+    });
+
+};
+
+/** Stop all services
+ *
+ */
+rpcrouter.prototype.stop = function () {
+  Sch.RemoveTimer('RPC Garbage Collector and Timeout Service');
+  Sch.RemoveTimer('RPC broker service');
+ 
+}
+/**
+ *
+ * @param  {port} hostport
+ * @returns {rpcrouter}
+ * @constructor
+ */
+function RpcRouter(hostport,options) {
+    var obj = new rpcrouter(hostport,options);
+    Object.preventExtensions(obj);
+    return obj;
+}
+
+module.exports = {
+    RpcRouter: RpcRouter
+};