cleanup

README.md

@@ -1,3 +1,87 @@
+dns-lint
+========
+
+Fast, lightweight, **pure JavaScript** (ES5.1) implementation for DNS / mDNS.
+
+Works great in **Web Browsers** and in node.js!
+
+Details error checking makes it great for
+
+* capture
+* packing (JSON to DNS)
+* parsing (DNS to JSON)
+* linting (finding errors in packets)
+* debugging
+
+**No external dependencies** for modern browsers. Uses `DataView`, `Uint8Array`, `Uint16Array`, and `ArrayBuffer`
+
+Similar API to `dns.js` and `native-dns-packet`.
+
+Install
+-------
+
+```
+npm install git+https://git@git.daplie.com:Daplie/dns-lint
+```
+
+Usage
+-----
+
+**CLI**
+
+You can work directly from `node_modules/dns-lint`:
+
+```
+pushd node_modules/dns-lint/
+```
+
+Capture mDNS broadcast packets
+
+```
+# example
+# node bin/mdns-capture.js <file-prefix>
+node bin/mdns-capture.js mdns-test
+```
+
+```
+# in another terminal
+dig @224.0.0.251 -p 5353 -t PTR _services._dns-sd._udp.local
+```
+
+Parsing a saved packet
+
+```
+# example
+# node bin/dns-parse.js </path/to/packet.dns.bin>
+node bin/dns-parse.js samples/a-0.mdns.bin
+```
+
+**Library**
+
+* `packet = dnsjs.unpack(arrayBuffer)`
+* `packet = dnsjs.unpackRdatas(arrayBuffer, packet)`
+* `packet.answers[0].data = dnsjs.unpackRdatas(arrayBuffer, packet, packet.answers[0])`
+
+node.js:
+```
+var nodeBuffer = fs.readFileSync('./samples/a-0.mdns.bin');
+var arrayBuffer = nodeBuffer.buffer;
+
+var dnsjs = require('dns-lint');
+var packet = dnsjs.unpack(arrayBuffer);
+
+console.log(packet);
+```
+
+Browser:
+```
+var arrayBuffer = new Uint8Array.from([ /* bytes */ ]).buffer;
+
+var packet = pdns.unpack(arrayBuffer);
+
+console.log(packet);
+```
+
 mDNS Documentation
 ====
 
@@ -69,7 +153,7 @@ which is located in the node.js buffer module. The API is [here](https://nodejs.
 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.
 
-Using 
+Using
 
 ```javascript
 function pad(str, len, ch) {
@@ -170,7 +254,7 @@ function parseFlags(val, packet) {
 }
 ```
 
-One effective way to check is to create a dns packet, pass it to 
+One effective way to check is to create a dns packet, pass it to
 a custom packer and parser function and compare the input and output:
 
 ```javascript
@@ -257,6 +341,6 @@ socket.on('message', function (message, rinfo) {
 
 
 
-DNS sec: security 
+DNS sec: security
 puts a signature on a DNS packet and imprints a signature so that the sender of
 the packet is confirmed

bin/mdns-capture.js

@@ -25,11 +25,13 @@ handlers.onError = function (err) {
 };
 handlers.onMessage = function (buffer) {
   var path = require('path');
-  var name = type + '-' + count + '.mdns.bin';
+  var filename = type + '-' + count + '.mdns.bin';
+  var fullpath = path.join('samples', filename);
+
   count += 1;
 
-  fs.writeFileAsync(path.join('samples', name), buffer).then(function () {
-    console.log('wrote ' + buffer.length + ' bytes to ' + name);
+  fs.writeFileAsync(fullpath, buffer).then(function () {
+    console.log('wrote ' + buffer.length + ' bytes to ' + fullpath);
   });
 };
 handlers.onListening = function () {