From e1fbb967685f400e4a4bceddb4eb0aeaa0723400 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Marteaux?= <jerome@dedwen.info>
Date: Wed, 28 Oct 2015 22:48:08 +0100
Subject: [PATCH] Can provide ip to bind on client mode (only udp)

---
 lib/client.js | 6 ++++++
 lib/utils.js  | 8 ++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/client.js b/lib/client.js
index bf204d4..def8f9b 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -61,6 +61,12 @@ var Request = exports.Request = function(opts) {
   if (!this.server || !this.server.address || !net.isIP(this.server.address))
     throw new Error('Server object must be supplied with at least address');
 
+  if (this.server.bind && !net.isIP(this.server.bind))
+    throw new Error('Server object bind attribute must be an IP address');
+
+  if (this.server.bind && this.server.type == 'tcp')
+    throw new Error('Bind attribute is not supported on tcp mode, sorry');
+
   if (!this.server.type || ['udp', 'tcp'].indexOf(this.server.type) === -1)
     this.server.type = 'udp';
 
diff --git a/lib/utils.js b/lib/utils.js
index 47bf497..80ed8b7 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -24,7 +24,8 @@ var dgram = require('dgram'),
     net = require('net'),
     util = require('util');
 
-var UDPSocket = exports.UDPSocket = function(socket, remote) {
+var UDPSocket = exports.UDPSocket = function(socket, remote, bind) {
+  this._bind = bind;
   this._socket = socket;
   this._remote = remote;
   this._buff = undefined;
@@ -72,7 +73,10 @@ UDPSocket.prototype.bind = function(type) {
       self.emit('close');
     });
 
-    this._socket.bind();
+    if (this._bind)
+      this._socket.bind(null, this._bind);
+    else
+      this._socket.bind();
   }
 };