diff --git a/index.js b/index.js
index 793ed40..42ed4ec 100644
--- a/index.js
+++ b/index.js
@@ -1,8 +1,19 @@
 'use strict';
 
 module.exports.create = function (opts) {
+  var machine;
+
+  if (!opts.onMessage && !opts.onmessage) {
+    machine = new (require('events').EventEmitter)();
+  }
+
+  machine.onMessage = opts.onmessage || opts.onMessage;
+  machine.onmessage = opts.onmessage || opts.onMessage;
+  machine.onError = opts.onerror || opts.onError;
+  machine.onerror = opts.onerror || opts.onError;
+  machine.onEnd = opts.onend || opts.onEnd;
+  machine.onend = opts.onend || opts.onEnd;
 
-  var machine = { onMessage: opts.onMessage };
   machine._version = 1;
   machine.state = 0;
   machine.states = { 0: 'version', 1: 'headerLength', 2: 'header', 3: 'data'/*, 4: 'error'*/ };
@@ -95,6 +106,7 @@ module.exports.create = function (opts) {
     //console.log('curSize:', curSize);
     //console.log('bodyLen:', machine.bodyLen, typeof machine.bodyLen);
     var partLen = 0;
+    var msg;
 
     partLen = Math.min(machine.bodyLen - machine.bufIndex, chunk.length - machine.chunkIndex);
 
@@ -125,13 +137,69 @@ module.exports.create = function (opts) {
     }
     machine.bufIndex += partLen;
 
-    machine.onMessage({
-      family: machine.family
-    , address: machine.address
-    , port: machine.port
-    , data: machine.buf.slice(0, machine.bufIndex)
-    , service: machine.service
-    });
+    machine.service = machine.service || machine.type;
+    machine.type = machine.type || machine.service;
+
+
+    //
+    // data, end, error
+    //
+    if ('end' === machine.type) {
+      msg = {};
+
+      msg.family = machine.family;
+      msg.address = machine.address;
+      msg.port = machine.port;
+      msg.service = 'end';
+      msg.type = msg.type || 'end';
+
+      if (machine.emit) {
+        machine.emit('tunnelEnd', msg);
+      }
+      else {
+        (machine.onend||machine.onmessage)(msg);
+      }
+    }
+    else if ('error' === machine.type) {
+      try {
+        msg = JSON.parse(machine.data.toString());
+      } catch(e) {
+        msg = new Error('unknown error');
+      }
+
+      msg.family = machine.family;
+      msg.address = machine.address;
+      msg.port = machine.port;
+      msg.service = 'error';
+      msg.type = msg.type || 'error';
+
+      if (machine.emit) {
+        machine.emit('tunnelError', msg);
+      }
+      else {
+        (machine.onerror||machine.onError)(msg);
+      }
+    }
+    else {
+      msg = {
+        data: machine.buf.slice(0, machine.bufIndex)
+      , service: machine.service
+      , type: machine.type
+      };
+
+      msg.family = machine.family;
+      msg.address = machine.address;
+      msg.port = machine.port;
+      msg.service = machine.service;
+      msg.type = machine.type || 'data';
+
+      if (machine.emit) {
+        machine.emit('tunnelData', msg);
+      }
+      else {
+        machine.onmessage(msg);
+      }
+    }
 
     machine.chunkIndex += partLen;  // === chunk.length
     machine.buf = null;             // reset to null