Provided a destructor for lwipClient

Provided a destructor that takes care of deallocating the _tcp_client
only when allocated with mem_alloc() and not passed in the constructor

Author: andreagilardoni

libraries/lwIpWrapper/src/lwipClient.cpp

@@ -8,7 +8,7 @@ extern "C" {
 
 /* -------------------------------------------------------------------------- */
 lwipClient::lwipClient()
-    : _tcp_client(NULL)
+    : _tcp_client(NULL), _provided_tcp_client(false)
 {
 }
 /* -------------------------------------------------------------------------- */
@@ -17,15 +17,28 @@ lwipClient::lwipClient()
 sketches but sock is ignored. */
 /* -------------------------------------------------------------------------- */
 lwipClient::lwipClient(uint8_t sock)
-    : _tcp_client(NULL)
+    : _tcp_client(NULL), _provided_tcp_client(false)
+
 {
 }
 /* -------------------------------------------------------------------------- */
 
 /* -------------------------------------------------------------------------- */
 lwipClient::lwipClient(struct tcp_struct* tcpClient)
+    : _tcp_client(tcpClient), _provided_tcp_client(true)
+
 {
-    _tcp_client = tcpClient;
+}
+/* -------------------------------------------------------------------------- */
+
+/* -------------------------------------------------------------------------- */
+lwipClient::~lwipClient() 
+{
+    stop();
+
+    if(!_provided_tcp_client) {
+        mem_free(_tcp_client); 
+    }
 }
 /* -------------------------------------------------------------------------- */
 

libraries/lwIpWrapper/src/lwipClient.h

@@ -16,6 +16,7 @@ class lwipClient : public Client {
     lwipClient();
     lwipClient(uint8_t sock);
     lwipClient(struct tcp_struct* tcpClient);
+    virtual ~lwipClient();
 
     uint8_t status();
     virtual int connect(IPAddress ip, uint16_t port);
@@ -68,6 +69,8 @@ class lwipClient : public Client {
 private:
     struct tcp_struct* _tcp_client;
     uint16_t _timeout = 10000;
+
+    const bool _provided_tcp_client;
 };
 
 #endif