From cce70d269c23e9985fe970378fb6dd209b576643 Mon Sep 17 00:00:00 2001
From: Richard Sim <github@devras.com>
Date: Sun, 2 Dec 2012 22:39:34 -0800
Subject: [PATCH] * Fixed memory leak when calling Ethernet.begin() multiple
 times * Ensure the UDP socket is closed before trying to open it

---
 libraries/Ethernet/Dhcp.cpp     | 1 +
 libraries/Ethernet/Ethernet.cpp | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/Ethernet/Dhcp.cpp b/libraries/Ethernet/Dhcp.cpp
index e4d27f722..56d5b6951 100755
--- a/libraries/Ethernet/Dhcp.cpp
+++ b/libraries/Ethernet/Dhcp.cpp
@@ -43,6 +43,7 @@ int DhcpClass::request_DHCP_lease(){
     _dhcpTransactionId = random(1UL, 2000UL);
     _dhcpInitialTransactionId = _dhcpTransactionId;
 
+    _dhcpUdpSocket.stop();
     if (_dhcpUdpSocket.begin(DHCP_CLIENT_PORT) == 0)
     {
       // Couldn't get a socket
diff --git a/libraries/Ethernet/Ethernet.cpp b/libraries/Ethernet/Ethernet.cpp
index 5d28f71f9..c31a85f09 100644
--- a/libraries/Ethernet/Ethernet.cpp
+++ b/libraries/Ethernet/Ethernet.cpp
@@ -10,7 +10,8 @@ uint16_t EthernetClass::_server_port[MAX_SOCK_NUM] = {
 
 int EthernetClass::begin(uint8_t *mac_address)
 {
-  _dhcp = new DhcpClass();
+  static DhcpClass s_dhcp;
+  _dhcp = &s_dhcp;
 
 
   // Initialise the basic info