Source: ../../fea/fticonfig_entry_get.hh

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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-

// Copyright (c) 2001-2005 International Computer Science Institute
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software")
// to deal in the Software without restriction, subject to the conditions
// listed in the XORP LICENSE file. These conditions include: you must
// preserve this copyright notice, and you cannot mention the copyright
// holders in advertising related to the Software without their permission.
// The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
// notice is a summary of the XORP LICENSE file; the license in that file is
// legally binding.

// $XORP: xorp/fea/fticonfig_entry_get.hh,v 1.22 2005/03/25 02:53:01 pavlin Exp $

#ifndef __FEA_FTICONFIG_ENTRY_GET_HH__
#define __FEA_FTICONFIG_ENTRY_GET_HH__


#include "libxorp/xorp.h"
#include "libxorp/ipvx.hh"

#include "fte.hh"
#include "click_socket.hh"
#include "netlink_socket.hh"
#include "routing_socket.hh"


class IPv4;
class IPv6;
class FtiConfig;

class FtiConfigEntryGet {
public:
    FtiConfigEntryGet(FtiConfig& ftic);
    
    virtual ~FtiConfigEntryGet();
    
    FtiConfig&	ftic() { return _ftic; }
    
    virtual void register_ftic_primary();
    virtual void register_ftic_secondary();
    virtual void set_primary() { _is_primary = true; }
    virtual void set_secondary() { _is_primary = false; }
    virtual bool is_primary() const { return _is_primary; }
    virtual bool is_secondary() const { return !_is_primary; }
    virtual bool is_running() const { return _is_running; }

    /**
     * Start operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int start(string& error_msg) = 0;
    
    /**
     * Stop operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int stop(string& error_msg) = 0;
    
    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return bool on success, otherwise false.
     */
    virtual bool lookup_route_by_dest4(const IPv4& dst, Fte4& fte) = 0;

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network4(const IPv4Net& dst, Fte4& fte) = 0;

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest6(const IPv6& dst, Fte6& fte) = 0;

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network6(const IPv6Net& dst, Fte6& fte) = 0;

    /**
     * Parse information about routing entry information received from
     * the underlying system.
     * 
     * The information to parse is in RTM format
     * (e.g., obtained by routing sockets or by sysctl(3) mechanism).
     * 
     * @param fte the Fte storage to store the parsed information.
     * @param buf the buffer with the data to parse.
     * @param buf_bytes buf_bytes the size of the data in the buffer.
     * @param filter the set of messages that caller is interested in.
     * @return true on success, otherwise false.
     * @see FteX.
     */
    bool parse_buffer_rtm(FteX& fte, const uint8_t *buf, size_t buf_bytes,
			  FtiFibMsgSet filter);

    /**
     * Parse information about routing entry information received from
     * the underlying system.
     * 
     * The information to parse is in NETLINK format
     * (e.g., obtained by netlink(7) sockets mechanism).
     * 
     * @param fte the Fte storage to store the parsed information.
     * @param buf the buffer with the data to parse.
     * @param buf_bytes buf_bytes the size of the data in the buffer.
     * @param is_nlm_get_only if true, consider only the entries obtained
     * by RTM_GETROUTE.
     * @return true on success, otherwise false.
     * @see FteX.
     */
    bool parse_buffer_nlm(FteX& fte, const uint8_t *buf, size_t buf_bytes,
			  bool is_nlm_get_only);

protected:
    int sock(int family);
    
    int	_s4;
    int _s6;

    // Misc other stat
    bool	_is_running;

private:
    FtiConfig&	_ftic;
    bool	_is_primary;	// True -> primary, false -> secondary method
};

class FtiConfigEntryGetDummy : public FtiConfigEntryGet {
public:
    FtiConfigEntryGetDummy(FtiConfig& ftic);
    virtual ~FtiConfigEntryGetDummy();

    /**
     * Start operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int start(string& error_msg);
    
    /**
     * Stop operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int stop(string& error_msg);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest4(const IPv4& dst, Fte4& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network4(const IPv4Net& dst, Fte4& fte);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest6(const IPv6& dst, Fte6& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network6(const IPv6Net& dst, Fte6& fte);

private:
};

class FtiConfigEntryGetRtsock : public FtiConfigEntryGet,
				public RoutingSocket {
public:
    FtiConfigEntryGetRtsock(FtiConfig& ftic);
    virtual ~FtiConfigEntryGetRtsock();

    /**
     * Start operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int start(string& error_msg);
    
    /**
     * Stop operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int stop(string& error_msg);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest4(const IPv4& dst, Fte4& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network4(const IPv4Net& dst, Fte4& fte);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest6(const IPv6& dst, Fte6& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network6(const IPv6Net& dst, Fte6& fte);

private:
    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest(const IPvX& dst, FteX& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network(const IPvXNet& dst, FteX& fte);

    RoutingSocketReader _rs_reader;
};

class FtiConfigEntryGetNetlink : public FtiConfigEntryGet,
				 public NetlinkSocket4,
				 public NetlinkSocket6 {
public:
    FtiConfigEntryGetNetlink(FtiConfig& ftic);
    virtual ~FtiConfigEntryGetNetlink();

    /**
     * Start operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int start(string& error_msg);
    
    /**
     * Stop operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int stop(string& error_msg);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest4(const IPv4& dst, Fte4& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network4(const IPv4Net& dst, Fte4& fte);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest6(const IPv6& dst, Fte6& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network6(const IPv6Net& dst, Fte6& fte);

private:
    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest(const IPvX& dst, FteX& fte);

    NetlinkSocketReader	_ns_reader;
};

class FtiConfigEntryGetClick : public FtiConfigEntryGet,
			       public ClickSocket {
public:
    FtiConfigEntryGetClick(FtiConfig& ftic);
    virtual ~FtiConfigEntryGetClick();

    /**
     * Start operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int start(string& error_msg);
    
    /**
     * Stop operation.
     * 
     * @param error_msg the error message (if error).
     * @return XORP_OK on success, otherwise XORP_ERROR.
     */
    virtual int stop(string& error_msg);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest4(const IPv4& dst, Fte4& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network4(const IPv4Net& dst, Fte4& fte);

    /**
     * Lookup a route by destination address.
     *
     * @param dst host address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_dest6(const IPv6& dst, Fte6& fte);

    /**
     * Lookup route by network address.
     *
     * @param dst network address to resolve.
     * @param fte return-by-reference forwarding table entry.
     *
     * @return true on success, otherwise false.
     */
    virtual bool lookup_route_by_network6(const IPv6Net& dst, Fte6& fte);

private:
    ClickSocketReader	_cs_reader;
};

#endif // __FEA_FTICONFIG_ENTRY_GET_HH__