Initial commit. Created PDU class.

include/pdu.h

@@ -0,0 +1,40 @@
+#ifndef __PDU_H
+#define __PDU_H
+
+
+#include <stdint.h>
+
+class PDU {
+public:
+    PDU(uint32_t pdu_flag, PDU *next_pdu = 0);
+    virtual ~PDU();
+    
+    /* This PDU's header size only. */
+    virtual uint32_t header_size() const = 0;
+    /* This PDU's trailer size only. Defaults to 0. */
+    virtual uint32_t trailer_size() const { return 0; }
+    
+    /* The size of the whole chain of PDUs, including this one. */
+    uint32_t size() const;
+    
+    inline const PDU *inner_pdu() const { return _inner_pdu; }
+    
+    /* When setting a new inner_pdu, the instance takes
+     * ownership of the object, therefore deleting it when
+     * it's no longer required. */
+    void inner_pdu(PDU *next_pdu);
+    
+    /* Serializes the whole chain of PDU's, including this one. */
+    uint8_t *serialize();
+    
+    /* Serialize this PDU storing the result in buffer. */
+    void serialize(uint8_t *buffer, uint32_t total_sz);
+protected:
+    /* Each PDU's own implementation of serialization. */
+    virtual void write_serialization(uint8_t *buffer, uint32_t total_sz) = 0;
+private:
+    uint32_t _pdu_flag;
+    PDU *_inner_pdu;
+};
+
+#endif