Rebuilding M-Bus context structs in progress

- changed local library file includes from <> to ""
- get rid of 'if (is_serial)' conditions
- mbus_context_serial() and mbus_context_tcp() allocates memory and initialize context specific function pointers
- simply mbus_connect() called instead of mbus_connect_tcp() or mbus_connect_serial()
- context specific data can still be accessed via (void* auxdata) pointer
- strdup(3) to copy host IP into TCP context struct

mbus/mbus-tcp.h

@@ -18,22 +18,19 @@
 #ifndef MBUS_TCP_H
 #define MBUS_TCP_H
 
-#include <mbus/mbus.h>
-
-typedef struct _mbus_tcp_handle {
+#include "mbus-protocol.h"
+#include "mbus-protocol-aux.h"
 
+typedef struct _mbus_tcp_handle
+{
     char *host;
-
     int port;
-    int sock;
-
 } mbus_tcp_handle;
 
-
-mbus_tcp_handle *mbus_tcp_connect(char *host, int port);
-int              mbus_tcp_disconnect(mbus_tcp_handle *handle);
-int              mbus_tcp_send_frame(mbus_tcp_handle *handle, mbus_frame *frame);
-int              mbus_tcp_recv_frame(mbus_tcp_handle *handle, mbus_frame *frame);
+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);
 
 #endif /* MBUS_TCP_H */