modificationlist.hh

#ifndef MIDDLEBOX_MODIFICATIONLIST_HH
#define MIDDLEBOX_MODIFICATIONLIST_HH
 
/*
 * modificationlist.hh - Class used to store the modifications performed in a
 * packet's structure
 *
 * Romain Gaillard.
 */
 
#include <click/config.h>
#include <click/glue.hh>
#include "memorypool.hh"
#include "bytestreammaintainer.hh"
 
CLICK_DECLS
 
class ByteStreamMaintainer;
 
struct ModificationNode
{
        uint32_t position; 
        int offset; 
        struct ModificationNode* next; 
};
 
class ModificationList
{
    // TCPOut is the only component allowed to commit modifications
    // It is thus a friend which can access the private method "commit"
    friend class TCPOut;
 
public:
    ModificationList(MemoryPool<struct ModificationNode>* poolNodes);
 
    ~ModificationList();
 
    void printList();
 
    bool addModification(uint32_t firstPosition, uint32_t position, int offset);
 
    bool isCommitted();
 
    void commit(ByteStreamMaintainer& maintainer);
 
private:
    bool sameSign(int first, int second);
 
    void mergeNodes();
 
    void clear();
 
    MemoryPool<struct ModificationNode> *poolNodes;
    struct ModificationNode *head;
    bool committed; 
};
 
 
CLICK_ENDDECLS
 
#endif