added pad function. Learning lots of cool things

howto.md

@@ -63,6 +63,11 @@ RangeError: Index out of range
 ```
 which is located in the node.js buffer module. The API is [here](https://nodejs.org/api/buffer.html).
 
+However, the error we are working with will most likely be dealt with by parsing through the binary
+and putting it in a format that is acceptable to a custom buffer, since the current buffer.js does
+doesn't seem to do the trick.
+
+Binary
 
 When can a Buffer overflow problem occur in js?
 

listen.js

@@ -11,12 +11,30 @@ var dns = require('dns-js');
 var broadcast = '224.0.0.251'; // mdns
 var port = 5353;               // mdns
 
+// ex: pad('11111', 8, '0')
+function pad(str, len, ch) {
+
+  while (str.length < len) {
+    str = ch + str;
+  }
+
+  return str;
+}
+
 socket.on('message', function (message, rinfo) {
   console.log('Received %d bytes from %s:%d\n',
     message.length, rinfo.address, rinfo.port);
   //console.log(msg.toString('utf8'));
-message.forEach(parseInt(byte.toString('hex'), 16).toString(2));
+
+  message.forEach(function(byte){
+
+    console.log(pad(byte.toString(2), 8,'0'));
+
+  });
+
+  console.log('got here');
   console.log(message.toString('hex'));
+  console.log(message.toString('ascii'));
   var packets;
 
   try {
@@ -31,10 +49,15 @@ message.forEach(parseInt(byte.toString('hex'), 16).toString(2));
   if (!Array.isArray(packets)) { packets = [packets]; }
 
   require('./cloud-respond.js').respond(socket, packets, rinfo);
+
+  // console.log(packets);
+  // console.log('\n');
 });
 
 socket.bind(port, function () {
+  console.log('***********************************')
   console.log('bound on', port);
+  console.log('***********************************')
   console.log('bound on', this.address());
 
   socket.setBroadcast(true);

node_modules/dns-js/lib/bufferconsumer.js

@@ -42,15 +42,15 @@ BufferConsumer.prototype.slice = function (length) {
     return v;
   }
   else {
-    // if ((this._offset + length) > this.length) {
+    if ((this._offset + length) > this.length) {
-    //   debug('Buffer owerflow. Slice beyond buffer.', {
+      debug('Buffer owerflow. Slice beyond buffer.', {
-    //     offset: this._offset,
+        offset: this._offset,
-    //     length: length,
+        length: length,
-    //     bufferLength: this.length
+        bufferLength: this.length
-    //   });
+      });
-    //   debug('so far', this);
+      debug('so far', this);
-    //   throw new Error('Buffer overflow');
+      throw new Error('Buffer overflow');
-    // }
+    }
     v = this.buffer.slice(this._offset, this._offset + length);
     this._offset += length;
     return v;

node_modules/dns-js/lib/dnspacket.js

@@ -225,7 +225,6 @@ function each(section /*[,filter], callback*/) {
   });
 }
 
-
 /**
  * Serialize this DNSPacket into an Buffer for sending over UDP.
  * @returns {Buffer} A Node.js Buffer