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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __VOM_NAT_BINDING_H__
#define __VOM_NAT_BINDING_H__
#include "vom/hw.hpp"
#include "vom/interface.hpp"
#include "vom/object_base.hpp"
#include "vom/om.hpp"
#include "vom/singular_db.hpp"
namespace VOM {
/**
* A Class representing the binding of an L2 interface to a bridge-domain
* and the properties of that binding.
*/
class nat_binding : public object_base
{
public:
/**
* NAT Zoness
*/
struct zone_t : public enum_base<zone_t>
{
/**
* Constructor
*/
zone_t(int v, const std::string s);
/**
* Destructor
*/
~zone_t() = default;
/**
* Permit Zone
*/
const static zone_t INSIDE;
/**
* Deny Zone
*/
const static zone_t OUTSIDE;
};
/**
* The key for a NAT Binding.
* The zoe is not included, since the same interface is never inside
* and outside.
*/
typedef std::tuple<interface::key_t, direction_t, l3_proto_t> key_t;
/**
* Construct a new object matching the desried state
* @param itf The interface onto which we bind/apply the feature
* @param dir The direction (input/output)
* @param proto The L3 proto used inside.
* @param zone The NAT zone for the link
*/
nat_binding(const interface& itf,
const direction_t& dir,
const l3_proto_t& proto,
const zone_t& zone);
/**
* Copy Constructor
*/
nat_binding(const nat_binding& o);
/**
* Destructor
*/
~nat_binding();
/**
* Return the 'singular instance' of the L2 config that matches this
* object
*/
std::shared_ptr<nat_binding> singular() const;
/**
* convert to string format for debug purposes
*/
std::string to_string() const;
/**
* Dump all nat_bindings into the stream provided
*/
static void dump(std::ostream& os);
private:
/**
* Class definition for listeners to OM events
*/
class event_handler : public OM::listener, public inspect::command_handler
{
public:
event_handler();
virtual ~event_handler() = default;
/**
* Handle a populate event
*/
void handle_populate(const client_db::key_t& key);
/**
* Handle a replay event
*/
void handle_replay();
/**
* Show the object in the Singular DB
*/
void show(std::ostream& os);
/**
* Get the sortable Id of the listener
*/
dependency_t order() const;
};
/**
* event_handler to register with OM
*/
static event_handler m_evh;
/**
* Enquue commonds to the VPP command Q for the update
*/
void update(const nat_binding& obj);
/**
* Find or Add the singular instance in the DB
*/
static std::shared_ptr<nat_binding> find_or_add(const nat_binding& temp);
/*
* It's the OM class that calls singular()
*/
friend class OM;
/**
* It's the singular_db class that calls replay()
*/
friend class singular_db<const key_t, nat_binding>;
/**
* Sweep/reap the object if still stale
*/
void sweep(void);
/**
* replay the object to create it in hardware
*/
void replay(void);
/**
* HW configuration for the binding. The bool representing the
* do/don't bind.
*/
HW::item<bool> m_binding;
/**
* A reference counting pointer the interface that this NAT binding
* represents. By holding the reference here, we can guarantee that
* this object will outlive the interface
*/
const std::shared_ptr<interface> m_itf;
/**
* The direction in which the feature applies
*/
direction_t m_dir;
/**
* The L3 protocol used on the inside
*/
l3_proto_t m_proto;
/**
* The NAT zone the interface is in
*/
zone_t m_zone;
/**
* A map of all L2 interfaces key against the interface's handle_t
*/
static singular_db<const key_t, nat_binding> m_db;
};
std::ostream& operator<<(std::ostream& os, const nat_binding::key_t& key);
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "mozilla")
* End:
*/
#endif
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