Adds stopPort to api

Fixes #61

lib/portfinder.d.ts

@@ -15,6 +15,10 @@ interface PortFinderOptions{
    * Minimum port (takes precedence over `basePort`).
    */
   port?: number;
+  /**
+   * Maximum port
+   */
+   stopPort?: number;
 }
 
 /**

lib/portfinder.js

@@ -50,7 +50,7 @@ internals.testPort = function(options, callback) {
 
     options.server.removeListener('listening', onListen);
 
-    if (err.code !== 'EADDRINUSE' && err.code !== 'EACCES') {
+    if (!(err.code == 'EADDRINUSE' || err.code == 'EACCES')) {
       return callback(err);
     }
 
@@ -90,6 +90,9 @@ exports.getPort = function (options, callback) {
     options = {};
   }
 
+  // Largest port number is an unsigned short 2**16 -1=65335
+  options.stopPort = Number(options.stopPort) || 65535
+
   if (options.host) {
 
     var hasUserGivenHost;
@@ -137,11 +140,11 @@ exports.getPort = function (options, callback) {
           // hosts, without showing them a good error.
           var msg = 'Provided host ' + options.host + ' could NOT be bound. Please provide a different host address or hostname';
           return callback(Error(msg));
+        } else {
+          var idx = exports._defaultHosts.indexOf(currentHost);
+          exports._defaultHosts.splice(idx, 1);
+          return exports.getPort(options, callback);
         }
-
-        var idx = exports._defaultHosts.indexOf(currentHost);
-        exports._defaultHosts.splice(idx, 1);
-        return exports.getPort(options, callback);
       } else {
         // error is not accounted for, file ticket, handle special case
         return callback(err);
@@ -157,7 +160,13 @@ exports.getPort = function (options, callback) {
 
     if (openPorts[0] === openPorts[openPorts.length-1]) {
       // if first === last, we found an open port
-      return callback(null, openPorts[0]);
+      if(openPorts[0] < option.stopPort) {
+        return callback(null, openPorts[0]);
+      }
+      else {
+        var msg = 'No open ports found in between '+ options.basePort + ' and ' + options.stopPort;
+        return callback(Error(msg));
+      }
     } else {
       // otherwise, try again, using sorted port, aka, highest open for >= 1 host
       return exports.getPort({ port: openPorts.pop(), host: options.host }, callback);
@@ -329,7 +338,6 @@ exports.nextSocket = function (socketPath) {
       match = name.match(/^([a-zA-z]+)(\d*)$/i),
       index = parseInt(match[2]),
       base = match[1];
-
   if (isNaN(index)) {
     index = 0;
   }