index.js

@@ -11,55 +11,19 @@ Packer.create = function (opts) {
     machine = {};
   }
 
+  machine.onMessage = opts.onmessage || opts.onMessage;
   machine.onmessage = opts.onmessage || opts.onMessage;
-  machine.oncontrol = opts.oncontrol || opts.onControl;
+  machine.onError = opts.onerror || opts.onError;
   machine.onerror = opts.onerror || opts.onError;
+  machine.onEnd = opts.onend || opts.onEnd;
   machine.onend = opts.onend || opts.onEnd;
 
   machine._version = 1;
-  machine.fns = {};
+  machine.state = 0;
-
+  machine.states = { 0: 'version', 1: 'headerLength', 2: 'header', 3: 'data'/*, 4: 'error'*/ };
+  machine.states_length = Object.keys(machine.states).length;
   machine.chunkIndex = 0;
-  machine.buf = null;
+  machine.fns = {};
-  machine.bufIndex = 0;
-  machine.fns.collectData = function (chunk, size) {
-    var chunkLeft = chunk.length - machine.chunkIndex;
-
-    if (size <= 0) {
-      return Buffer.alloc(0);
-    }
-
-    // First handle case where we don't have all the data we need yet. We need to save
-    // what we have in a buffer, and increment the index for both the buffer and the chunk.
-    if (machine.bufIndex + chunkLeft < size) {
-      if (!machine.buf) {
-        machine.buf = Buffer.alloc(size);
-      }
-      chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex);
-      machine.bufIndex += chunkLeft;
-      machine.chunkIndex += chunkLeft;
-
-      return null;
-    }
-
-    // Read and mark as read however much data we need from the chunk to complete our buffer.
-    var partLen = size - machine.bufIndex;
-    var part = chunk.slice(machine.chunkIndex, machine.chunkIndex+partLen);
-    machine.chunkIndex += partLen;
-
-    // If we had nothing buffered than the part of the chunk we just read is all we need.
-    if (!machine.buf) {
-      return part;
-    }
-
-    // Otherwise we need to copy the new data into the buffer.
-    part.copy(machine.buf, machine.bufIndex);
-    // Before returning the buffer we need to clear our reference to it.
-    var buf = machine.buf;
-    machine.buf = null;
-    machine.bufIndex = 0;
-    return buf;
-  };
 
   machine.fns.version = function (chunk) {
     //console.log('');
@@ -84,58 +48,118 @@ Packer.create = function (opts) {
     return true;
   };
 
+
+  machine.buf = null;
+  machine.bufIndex = 0;
+  //var buf = Buffer.alloc(4096);
   machine.fns.header = function (chunk) {
     //console.log('');
     //console.log('[header]');
-    var header = machine.fns.collectData(chunk, machine.headerLen);
+    var curSize = machine.bufIndex + (chunk.length - machine.chunkIndex);
+    var partLen = 0;
+    var str = '';
+    var part;
 
-    // We don't have the entire header yet so return false.
+    if (curSize < machine.headerLen) {
-    if (!header) {
+      // I still don't have the whole header,
-      return false;
+      // so just create a large enough buffer,
+      // write these bits, and wait for the next chunk.
+      if (!machine.buf) {
+        machine.buf = Buffer.alloc(machine.headerLen);
       }
 
-    machine._headers = header.toString().split(/,/g);
+      // partLen should be no more than the available size
+      partLen = Math.min(machine.headerLen - machine.bufIndex, chunk.length - machine.chunkIndex);
+      part = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
+      chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
+      machine.chunkIndex += partLen; // this MUST be chunk.length
+      machine.bufIndex += partLen;
+
+      return false;
+    }
+    else {
+      // it's now ready to discover the whole header
+      if (machine.buf) {
+        str += machine.buf.slice(0, machine.bufIndex).toString();
+      }
+
+      partLen = machine.headerLen - str.length;
+      part = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
+      str += part.toString();
+
+      machine.chunkIndex += partLen;
+      machine.buf = null; // back to null
+      machine.bufIndex = 0; // back to 0
+
+      machine._headers = str.split(/,/g);
 
       machine.family = machine._headers[0];
       machine.address = machine._headers[1];
       machine.port = machine._headers[2];
-    machine.bodyLen = parseInt(machine._headers[3], 10) || 0;
+      machine.bodyLen = parseInt(machine._headers[3], 10) || -1;
       machine.service = machine._headers[4];
       //console.log('machine.service', machine.service);
 
       return true;
+    }
   };
 
   machine.fns.data = function (chunk) {
     //console.log('');
     //console.log('[data]');
-    var data = machine.fns.collectData(chunk, machine.bodyLen);
+    var curSize = machine.bufIndex + (chunk.length - machine.chunkIndex);
+    //console.log('curSize:', curSize);
+    //console.log('bodyLen:', machine.bodyLen, typeof machine.bodyLen);
+    var partLen = 0;
+    var msg;
+    var data;
+
+    partLen = Math.min(machine.bodyLen - machine.bufIndex, chunk.length - machine.chunkIndex);
+
+    if (curSize < machine.bodyLen) {
+      //console.log('curSize < bodyLen');
+
+      // I still don't have the whole header,
+      // so just create a large enough buffer,
+      // write these bits, and wait for the next chunk.
+      if (!machine.buf) {
+        machine.buf = Buffer.alloc(machine.bodyLen);
+      }
+
+      chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
+      machine.chunkIndex += partLen; // this MUST be chunk.length
+      machine.bufIndex += partLen;
 
-    // We don't have the entire body yet so return false.
-    if (!data) {
       return false;
     }
 
+    if (machine.bufIndex > 0) {
+      // the completing remainder of the body is in the current slice
+      chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
+    }
+    else {
+      // the whole body is in the current slice
+      machine.buf = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
+    }
+    machine.bufIndex += partLen;
+
+    machine.service = machine.service;
+    data = machine.buf.slice(0, machine.bufIndex);
+    //console.log('machine.service', machine.service);
+
+
     //
     // data, end, error
     //
-    var msg = {};
+    if ('end' === machine.service) {
-    if ('error' === machine.service) {
+      msg = {};
-      try {
-        msg = JSON.parse(data.toString());
-      } catch(e) {
-        msg.message = data.toString();
-        msg.code = 'E_UNKNOWN_ERR';
-      }
-    }
 
       msg.family = machine.family;
       msg.address = machine.address;
       msg.port = machine.port;
-    msg.service = machine.service;
+      msg.service = 'end';
       msg.data = data;
 
-    if ('end' === machine.service) {
       if (machine.emit) {
         machine.emit('tunnelEnd', msg);
       }
@@ -144,6 +168,18 @@ Packer.create = function (opts) {
       }
     }
     else if ('error' === machine.service) {
+      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.data = data;
+
       if (machine.emit) {
         machine.emit('tunnelError', msg);
       }
@@ -151,15 +187,15 @@ Packer.create = function (opts) {
         (machine.onerror||machine.onmessage)(msg);
       }
     }
-    else if ('control' === machine.service) {
-      if (machine.emit) {
-        machine.emit('tunnelControl', msg);
-      }
-      else {
-        (machine.oncontrol||machine.onmessage)(msg);
-      }
-    }
     else {
+      msg = {};
+
+      msg.family = machine.family;
+      msg.address = machine.address;
+      msg.port = machine.port;
+      msg.service = machine.service;
+      msg.data = data;
+
       if (machine.emit) {
         machine.emit('tunnelData', msg);
       }
@@ -168,11 +204,12 @@ Packer.create = function (opts) {
       }
     }
 
+    machine.chunkIndex += partLen;  // === chunk.length
+    machine.buf = null;             // reset to null
+    machine.bufIndex = 0;           // reset to 0
+
     return true;
   };
-
-  machine.state = 0;
-  machine.states = ['version', 'headerLength', 'header', 'data'];
   machine.fns.addChunk = function (chunk) {
     //console.log('');
     //console.log('[addChunk]');
@@ -182,19 +219,17 @@ Packer.create = function (opts) {
 
       if (true === machine.fns[machine.states[machine.state]](chunk)) {
         machine.state += 1;
-        machine.state %= machine.states.length;
+        machine.state %= machine.states_length;
       }
     }
   };
 
   return machine;
+
 };
 
 Packer.pack = function (address, data, service) {
   data = data || Buffer.alloc(1);
-  if (!Buffer.isBuffer(data)) {
-    data = new Buffer(JSON.stringify(data));
-  }
   if (!data.byteLength) {
     data = Buffer.alloc(1);
   }
@@ -207,21 +242,16 @@ Packer.pack = function (address, data, service) {
   }
 
   var version = 1;
-  var header;
+  var header = Buffer.from([
-  if (service === 'control') {
+    /*servername,*/ address.family, address.address, address.port, data.byteLength
-    header = Buffer.from(['', '', '', data.byteLength, service].join(','));
+  , (address.service || '')
-  }
-  else {
-    header = Buffer.from([
-      address.family, address.address, address.port, data.byteLength, (address.service || '')
   ].join(','));
-  }
   var meta = Buffer.from([ 255 - version, header.length ]);
   var buf = Buffer.alloc(meta.byteLength + header.byteLength + data.byteLength);
 
-  meta.copy(buf, 0);
+  meta.copy(buf, 0, 0, meta.byteLength);
-  header.copy(buf, 2);
+  header.copy(buf, 2, 0, header.byteLength);
-  data.copy(buf, 2 + header.byteLength);
+  data.copy(buf, 2 + header.byteLength, 0, data.byteLength);
 
   return buf;
 };
@@ -232,18 +262,22 @@ Packer.socketToAddr = function (socket) {
   // tlsSocket.remoteAddress = remoteAddress; // causes core dump
   // console.log(tlsSocket.remoteAddress);
 
-  function extractValue(name) {
-    return socket[name]
-      || socket['_'+name]
-      || socket._handle._parentWrap[name]
-      || socket._handle._parentWrap._handle.owner.stream[name]
-      ;
-  }
-
   return {
-    family:  extractValue('remoteFamily')
+    family:
-  , address: extractValue('remoteAddress')
+       socket.remoteFamily
-  , port:    extractValue('remotePort')
+    || socket._remoteFamily
+    || socket._handle._parentWrap.remoteFamily
+    || socket._handle._parentWrap._handle.owner.stream.remoteFamily
+  , address:
+       socket.remoteAddress
+    || socket._remoteAddress
+    || socket._handle._parentWrap.remoteAddress
+    || socket._handle._parentWrap._handle.owner.stream.remoteAddress
+  , port:
+       socket.remotePort
+    || socket._remotePort
+    || socket._handle._parentWrap.remotePort
+    || socket._handle._parentWrap._handle.owner.stream.remotePort
   };
 };
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tunnel-packer",
-  "version": "1.2.1",
+  "version": "1.1.0",
   "description": "A strategy for packing and unpacking a proxy stream (i.e. packets through a tunnel). Handles multiplexed and tls connections. Used by telebit and telebitd.",
   "main": "index.js",
   "scripts": {