Source: ../../fea/iftree.hh
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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
// Copyright (c) 2001-2003 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/iftree.hh,v 1.2 2003/03/10 23:20:16 hodson Exp $
#ifndef __FEA_IFTREE_HH__
#define __FEA_IFTREE_HH__
#include <map>
#include <string>
#include "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h> /* Included for IFF_ definitions */
#include "libxorp/ipv4.hh"
#include "libxorp/ipv6.hh"
#include "libxorp/mac.hh"
/**
* Base class for Fea configurable items where the modifications need
* to be held over and propagated later, ie changes happen during a
* transaction but are propagated during the commit.
*/
class IfTreeItem {
public:
IfTreeItem() : _st(CREATED) {}
virtual ~IfTreeItem() {}
public:
enum State {
NO_CHANGE = 0x00,
CREATED = 0x01,
DELETED = 0x02,
CHANGED = 0x04
};
inline bool set_state(State st) {
if (bits(st) > 1) {
return false;
}
_st = st;
return true;
}
inline State state() const { return _st; }
inline bool mark(State st) {
if (bits(st) > 1) {
return false;
}
if (st & (CREATED|DELETED)) {
_st = st;
return true;
}
if (_st & (CREATED|DELETED)) {
return true;
}
_st = st;
return true;
}
inline bool is_marked(State st) const { return st == _st; }
/**
* Virtual method to be implemented to flush out state associated
* objects, ie if an object is marked CREATED or CHANGED it should be
* marked NO_CHANGE, if an object is marked DELETED, it should be
* removed from the relevant container and destructed.
*/
virtual void finalize_state() = 0;
string str() const;
protected:
inline static uint32_t bits(State st) {
uint32_t c;
for (c = 0; st != NO_CHANGE; c += st & 0x01)
st = State(st >> 1);
return c;
}
State _st;
};
/* Classes derived from IfTreeItem */
class IfTree;
class IfTreeInterface;
class IfTreeVif;
class IfTreeAddr4;
class IfTreeAddr6;
/**
* Container class for Fea Interface objects in a system.
*/
class IfTree : public IfTreeItem
{
public:
typedef map<const string, IfTreeInterface> IfMap;
/**
* Create a new interface.
*
* @param ifname interface name.
*
* @return true on success, false if an interface with ifname already
* exists.
*/
bool add_if(const string& ifname);
/**
* Label interface as ready for deletion. Deletion does not occur
* until finalize_state() is called.
*
* @param ifname name of interface to be labelled.
*
* @return true on success, false if ifname is invalid.
*/
bool remove_if(const string& ifname);
/**
* Get iterator of corresponding to named interface.
*
* @param ifn interface name to find iterator for.
*
* @return iterator, will be equal to ifs().end() if invalid.
*/
inline IfMap::iterator get_if(const string& ifn)
{ return _ifs.find(ifn); }
/**
* Get iterator of corresponding to named interface.
*
* @param ifn interface name to find iterator for.
*
* @return iterator, will be equal to ifs().end() if invalid.
*/
inline IfMap::const_iterator get_if(const string& ifn) const
{ return _ifs.find(ifn); }
inline const IfMap& ifs() const { return _ifs; }
inline IfMap& ifs() { return _ifs; }
/**
* Align config such that only elements present in the config
* and a user supplied config are present. State information is taken
* from supplied user config.
*
* Inside the FEA there may be multiple configuration representations,
* typically one the user modifies and one that mirrors the hardware.
* Errors may occur pushing the user config down onto the hardware and
* we need a method to update the user config from the h/w config that
* exists after the config push. We can't just copy the h/w config since
* the user config is restricted to configuration set by the user.
*
* @param user_config config to align state with.
* @return modified configuration structure.
*/
IfTree& align_with(const IfTree& user_config);
/**
* Delete interfaces labelled as ready for deletion, call finalize_state()
* on remaining interfaces, and set state to NO_CHANGE.
*/
void finalize_state();
/**
* @return string representation of IfTree.
*/
string str() const;
protected:
IfMap _ifs;
};
/**
* Fea class for holding physical interface state.
*/
class IfTreeInterface : public IfTreeItem
{
public:
typedef map<const string, IfTreeVif> VifMap;
IfTreeInterface(const string& ifname);
inline const string& name() const
{ return _ifname; }
inline const string& ifname() const
{ return _ifname; }
inline void set_enabled(bool en)
{ _en = en; mark(CHANGED); }
inline bool enabled() const
{ return _en; }
inline void set_mtu(uint32_t mtu) { _mtu = mtu; mark(CHANGED); }
inline uint32_t mtu() const { return _mtu; }
inline void set_mac(const Mac& mac) { _mac = mac; mark(CHANGED); }
inline const Mac& mac() const { return _mac; }
inline const VifMap& vifs() const { return _vifs; }
inline VifMap& vifs() { return _vifs; }
bool add_vif(const string& vifname);
bool remove_vif(const string& vifname);
inline VifMap::iterator get_vif(const string& vifname)
{ return _vifs.find(vifname); }
inline VifMap::const_iterator get_vif(const string& vifname) const
{ return _vifs.find(vifname); }
/**
* Copy state of internal variables from another IfTreeInterface.
*/
inline void copy_state(const IfTreeInterface& o)
{
set_enabled(o.enabled());
set_mtu(o.mtu());
set_mac(o.mac());
}
void finalize_state();
string str() const;
protected:
const string _ifname;
bool _en;
uint32_t _mtu;
Mac _mac;
VifMap _vifs;
};
/**
* Fea class for virtual (logical) interface state.
*/
class IfTreeVif : public IfTreeItem {
public:
typedef map<const IPv4, IfTreeAddr4> V4Map;
typedef map<const IPv6, IfTreeAddr6> V6Map;
IfTreeVif(const string& ifname, const string& vifname);
const string& ifname() const
{ return _ifname; }
const string& vifname() const
{ return _vifname; }
inline bool enabled() const
{ return _en; }
inline void set_enabled(bool en)
{ _en = en; mark(CHANGED); }
inline const V4Map& v4addrs() const { return _v4addrs; }
inline V4Map& v4addrs() { return _v4addrs; }
inline const V6Map& v6addrs() const { return _v6addrs; }
inline V6Map& v6addrs() { return _v6addrs; }
inline V4Map::iterator get_addr(const IPv4& a) { return _v4addrs.find(a); }
inline V6Map::iterator get_addr(const IPv6& a){ return _v6addrs.find(a); }
inline V4Map::const_iterator get_addr(const IPv4& a) const
{ return _v4addrs.find(a); }
inline V6Map::const_iterator get_addr(const IPv6& a) const
{ return _v6addrs.find(a); }
/**
* Add address.
*
* @param v4addr address to be added.
*
* @return true on success, false if address already exists
*/
bool add_addr(const IPv4& v4addr);
/**
* Mark address as DELETED. Deletion occurs when finalize_state is called.
*
* @param v4addr address to labelled.
*
* @return true on success, false if address does not exist.
*/
bool remove_addr(const IPv4& v4addr);
/**
* Add address.
*
* @param v4addr address to be added.
*
* @return true on success, false if address already exists
*/
bool add_addr(const IPv6& v6addr);
/**
* Mark address as DELETED. Deletion occurs when finalize_state is called.
*
* @param v4addr address to labelled.
*
* @return true on success, false if address does not exist.
*/
bool remove_addr(const IPv6& v6addr);
/**
* Copy state of internal variables from another IfTreeVif.
*/
inline void copy_state(const IfTreeVif& o)
{
set_enabled(o.enabled());
}
void finalize_state();
string str() const;
protected:
const string _ifname;
const string _vifname;
bool _en;
V4Map _v4addrs;
V6Map _v6addrs;
};
/**
* Class for holding an IPv4 interface address and address related items.
*/
class IfTreeAddr4 : public IfTreeItem
{
public:
IfTreeAddr4(const IPv4& addr)
: IfTreeItem(), _addr(addr), _en(false), _flags(0), _prefix(0)
{}
inline const IPv4& addr() const
{ return _addr; }
inline void set_enabled(bool en)
{ _en = en; mark(CHANGED); }
inline bool enabled() const
{ return _en; }
/**
* Set prefix associate with interface.
* @return true on success, false if prefix is invalid
*/
bool set_prefix(uint32_t prefix);
/**
* Get prefix associates with interface.
*/
inline uint32_t prefix() const
{ return _prefix; }
/**
* Get flags associated with interface.
*/
inline uint32_t flags() const
{ return _flags; }
/**
* Set the broadcast address.
* @param baddr the broadcast address.
*/
void set_bcast(const IPv4& baddr);
/**
* Get the broadcast address.
* @return the broadcast address or IPv4::ZERO() if there is no
* broadcast address set.
*/
IPv4 bcast() const;
/**
* Set the endpoint address of a point-to-point link.
* @param eaddr the endpoint address.
*/
void set_endpoint(const IPv4& eaddr);
/**
* Get the broadcast address.
* @return the broadcast address or IPv4::ZERO() if there is no
* broadcast address set.
*/
IPv4 endpoint() const;
void finalize_state();
string str() const;
protected:
IPv4 _addr;
IPv4 _oaddr; /* Other address - p2p endpoint or bcast addr */
bool _en;
uint32_t _flags;
uint32_t _prefix;
};
/**
* Class for holding an IPv6 interface address and address related items.
*/
class IfTreeAddr6 : public IfTreeItem
{
public:
IfTreeAddr6(const IPv6& addr)
: IfTreeItem(), _addr(addr), _en(false), _flags(0), _prefix(0)
{}
const IPv6& addr() const { return _addr; }
inline void set_enabled(bool en) { _en = en; mark(CHANGED); }
inline bool enabled() const { return _en; }
/**
* Set prefix associate with interface.
* @return true on success, false if prefix is invalid
*/
bool set_prefix(uint32_t prefix);
/**
* Get prefix associated with address.
*/
inline uint32_t prefix() const { return _prefix; }
/**
* Get flags associated with address.
*/
inline uint32_t flags() const { return _flags; }
void set_endpoint(const IPv6& oaddr);
IPv6 endpoint() const;
void finalize_state();
string str() const;
protected:
IPv6 _addr;
IPv6 _oaddr; /* Other address - p2p endpoint */
bool _en;
uint32_t _flags;
uint32_t _prefix;
};
#endif // __FEA_IFTREE_HH__
| Generated by: pavlin on possum.icir.org on Mon Mar 10 19:34:57 2003, using kdoc 2.0a54+XORP. |
