deleting pbuf when partially consumed

Author: andreagilardoni

libraries/lwIpWrapper/src/lwipClient.cpp

@@ -363,9 +363,12 @@ void lwipClient::stop() {
 
     // reset all the other variables in this class
 
-    // if(tcp->p != nullptr) {
-    //     pbuf_free(tcp->p); // FIXME it happens that a pbuf, with ref == 0 is added for some reason
-    // }
+    if(this->tcp_info->pbuf_head != nullptr) {
+        pbuf_free(this->tcp_info->pbuf_head); // FIXME it happens that a pbuf, with ref == 0 is added for some reason
+        this->tcp_info->pbuf_head = nullptr;
+    }
+    this->tcp_info->pbuf_offset = 0;
+
     if(this->tcp_info->server != nullptr) {
         // need to first make the server point to nullptr, then remove the client, can cause infinite recursion
         auto server = this->tcp_info->server;