Filter.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef NETWORK_STACK_FILTER_H
#define NETWORK_STACK_FILTER_H

#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/types.h"
#include "pedigree/kernel/utilities/List.h"
#include "pedigree/kernel/utilities/Tree.h"

class EXPORTED_PUBLIC NetworkFilter
{
  public:
    NetworkFilter();

    virtual ~NetworkFilter();

    static NetworkFilter &instance()
    {
        return m_Instance;
    }

    bool filter(size_t level, uintptr_t packet, size_t sz);

    size_t installCallback(size_t level, bool (*callback)(uintptr_t, size_t));

    void removeCallback(size_t level, size_t id);

  private:
    static NetworkFilter m_Instance;

    Tree<size_t, List<void *> *> m_Callbacks;
};

#endif  // NETWORK_STACK_FILTER_H