free_auxdata() added to mbus_handle interface for freeing context specific data

mbus/mbus-protocol-aux.c

@@ -1336,6 +1336,7 @@ mbus_context_serial(const char *device)
     handle->close = mbus_serial_disconnect;
     handle->recv = mbus_serial_recv_frame;
     handle->send = mbus_serial_send_frame;
+    handle->free_auxdata = mbus_tcp_data_free;
 
     if ((serial_data->device = strdup(device)) == NULL)
     {
@@ -1376,6 +1377,7 @@ mbus_context_tcp(const char *host, int port)
     handle->close = mbus_tcp_disconnect;
     handle->recv = mbus_tcp_recv_frame;
     handle->send = mbus_tcp_send_frame;
+    handle->free_auxdata = mbus_tcp_data_free;
 
     tcp_data->port = port;
     if ((tcp_data->host = strdup(host)) == NULL)
@@ -1390,6 +1392,16 @@ mbus_context_tcp(const char *host, int port)
     return handle;
 }
 
+void
+mbus_context_free(mbus_handle * handle)
+{
+    if (handle)
+    {
+        handle->free_auxdata(handle);
+        free(handle);
+    }
+}
+
 int
 modbus_connect(mbus_handle * handle)
 {

mbus/mbus-protocol-aux.h

@@ -77,6 +77,7 @@ struct _mbus_handle {
     int (*close) (struct _mbus_handle *handle);
     int (*send) (struct _mbus_handle *handle, mbus_frame *frame);
     int (*recv) (struct _mbus_handle *handle, mbus_frame *frame);
+    void (*free_auxdata) (struct _mbus_handle *handle);
     void *auxdata;
 };
 
@@ -159,6 +160,14 @@ mbus_handle * mbus_context_serial(const char *device);
 mbus_handle * mbus_context_tcp(const char *host, int port);
 
 /** 
+ * Deallocate memory used by M-Bus context.
+ *
+ * @param handle Initialized handle
+ *
+ */
+void mbus_context_free(mbus_handle * handle);
+
+/**
  * Connect to serial bus or TCP gateway depending on context.
  *
  * @param handle Initialized handle

mbus/mbus-serial.c

@@ -168,6 +168,19 @@ mbus_serial_disconnect(mbus_handle *handle)
     return 0;
 }
 
+void
+mbus_serial_data_free(mbus_handle *handle)
+{
+    mbus_serial_handle *serial_data;
+
+    if (handle)
+    {
+        serial_data = (mbus_serial_handle *) handle->auxdata;
+        free(serial_data->device);
+        free(serial_data);
+    }
+}
+
 //------------------------------------------------------------------------------
 //
 //------------------------------------------------------------------------------

mbus/mbus-serial.h

@@ -33,6 +33,7 @@ int                 mbus_serial_disconnect(mbus_handle *handle);
 int                 mbus_serial_send_frame(mbus_handle *handle, mbus_frame *frame);
 int                 mbus_serial_recv_frame(mbus_handle *handle, mbus_frame *frame);
 int                 mbus_serial_set_baudrate(mbus_handle *handle, int baudrate);
+void                mbus_serial_data_free(mbus_handle *handle);
 #endif /* MBUS_SERIAL_H */
 
 

mbus/mbus-tcp.c

@@ -89,6 +89,19 @@ mbus_tcp_connect(mbus_handle *handle)
     return 1;
 }
 
+void
+mbus_tcp_data_free(mbus_handle *handle)
+{
+    mbus_tcp_handle *tcp_data;
+
+    if (handle)
+    {
+        tcp_data = (mbus_tcp_handle *) handle->auxdata;
+        free(tcp_data->host);
+        free(tcp_data);
+    }
+}
+
 //------------------------------------------------------------------------------
 //
 //------------------------------------------------------------------------------

mbus/mbus-tcp.h

@@ -31,6 +31,7 @@ int              mbus_tcp_connect(mbus_handle *handle);
 int              mbus_tcp_disconnect(mbus_handle *handle);
 int              mbus_tcp_send_frame(mbus_handle *handle, mbus_frame *frame);
 int              mbus_tcp_recv_frame(mbus_handle *handle, mbus_frame *frame);
+void             mbus_tcp_data_free(mbus_handle *handle);
 
 #endif /* MBUS_TCP_H */