UDP.h

Go to the documentation of this file.

/*
 * Copyright (C) 2015 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __LIB_LIBNET_UDP_H
#define __LIB_LIBNET_UDP_H
 
#include <Types.h>
#include <Index.h>
#include <String.h>
#include <HashTable.h>
#include "NetworkProtocol.h"
#include "UDPSocket.h"
 
class UDPFactory;
 
class UDP : public NetworkProtocol
{
  private:
 
    static const Size MaxUdpSockets = 128u;
 
  public:
 
    typedef struct Header
    {
        u16 sourcePort;
        u16 destPort;
        u16 length;
        u16 checksum;
    }
    Header;
 
  public:
 
    UDP(NetworkServer &server,
        NetworkDevice &device,
        NetworkProtocol &parent);
 
    virtual ~UDP();
 
    virtual FileSystem::Result initialize();
 
    UDPSocket * createSocket(String & path,
                             const ProcessID pid);
 
    void unregisterSockets(const ProcessID pid);
 
    virtual FileSystem::Result process(const NetworkQueue::Packet *pkt,
                                       const Size offset);
 
    FileSystem::Result bind(UDPSocket *sock,
                            const u16 port);
 
    FileSystem::Result sendPacket(const NetworkClient::SocketInfo *src,
                                  const NetworkClient::SocketInfo *dest,
                                  IOBuffer & buffer,
                                  const Size size,
                                  const Size offset);
 
    static const u16 checksum(const IPV4::Header *ip,
                              const Header *header,
                              const Size datalen);
 
  private:
 
    static const ulong calculateSum(const u16 *ptr,
                                    const Size bytes);
 
  private:
 
    UDPFactory *m_factory;
 
    Index<UDPSocket, MaxUdpSockets> m_sockets;
 
    HashTable<u16, UDPSocket *> m_ports;
};
 
#endif /* __LIB_LIBNET_UDP_H */