ICMP.h

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/*
 * 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_ICMP_H
#define __LIB_LIBNET_ICMP_H
 
#include <Types.h>
#include <Index.h>
#include <String.h>
#include "NetworkProtocol.h"
#include "IPV4.h"
 
class ICMPFactory;
class ICMPSocket;
class ARP;
 
class ICMP : public NetworkProtocol
{
  private:
 
    static const Size MaxIcmpSockets = 128u;
 
  public:
 
    enum Type
    {
        EchoReply = 0,
        DestinationUnreachable = 3,
        Redirect = 5,
        EchoRequest = 8
    };
 
    typedef struct Header
    {
        u8 type;
        u8 code;
        u16 checksum;
        u16 id;
        u16 sequence;
    }
    Header;
 
  public:
 
    ICMP(NetworkServer &server,
         NetworkDevice &device,
         NetworkProtocol &parent);
 
    virtual ~ICMP();
 
    void setIP(::IPV4 *ip);
 
    virtual FileSystem::Result initialize();
 
    ICMPSocket * createSocket(String & path,
                              const ProcessID pid);
 
    void unregisterSockets(const ProcessID pid);
 
    virtual FileSystem::Result process(const NetworkQueue::Packet *pkt,
                                       const Size offset);
 
    FileSystem::Result sendPacket(const IPV4::Address ip,
                                  const Header *header,
                                  const void *payload,
                                  const Size payloadSize);
 
  private:
 
    ICMPFactory *m_factory;
 
    Index<ICMPSocket, MaxIcmpSockets> m_sockets;
};
 
#endif /* __LIB_LIBNET_ICMP_H */