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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_ACL_BINDING_H__
#define __VOM_ACL_BINDING_H__
#include <ostream>
#include "vom/acl_list.hpp"
#include "vom/acl_types.hpp"
#include "vom/hw.hpp"
#include "vom/inspect.hpp"
#include "vom/interface.hpp"
#include "vom/object_base.hpp"
#include "vom/om.hpp"
#include "vom/singular_db.hpp"
namespace VOM {
namespace ACL {
/**
* A binding between an ACL and an interface.
* A representation of the application of the ACL to the interface.
*/
template <typename LIST>
class binding : public object_base
{
public:
/**
* The key for a binding is the direction and the interface
*/
typedef std::pair<direction_t, interface::key_t> key_t;
/**
* Construct a new object matching the desried state
*/
binding(const direction_t& direction, const interface& itf, const LIST& acl)
: m_direction(direction)
, m_itf(itf.singular())
, m_acl(acl.singular())
, m_binding(false)
{
m_evh.order();
}
/**
* Copy Constructor
*/
binding(const binding& o)
: m_direction(o.m_direction)
, m_itf(o.m_itf)
, m_acl(o.m_acl)
, m_binding(o.m_binding)
{
}
/**
* Destructor
*/
~binding()
{
sweep();
m_db.release(std::make_pair(m_direction, m_itf->key()), this);
}
/**
* Return the 'singular instance' of the L2 config that matches this
* object
*/
std::shared_ptr<binding> singular() const { return find_or_add(*this); }
/**
* convert to string format for debug purposes
*/
std::string to_string() const
{
std::ostringstream s;
s << "acl-binding:[" << m_direction.to_string() << " " << m_itf->to_string()
<< " " << m_acl->to_string() << " " << m_binding.to_string() << "]";
return (s.str());
}
/**
* Dump all bindings into the stream provided
*/
static void dump(std::ostream& os) { m_db.dump(os); }
static dependency_t order() { return m_evh.order(); }
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() { m_db.replay(); }
/**
* Show the object in the Singular DB
*/
void show(std::ostream& os) { m_db.dump(os); }
/**
* Get the sortable Id of the listener
*/
dependency_t order() const { return (dependency_t::BINDING); }
};
/**
* event_handler to register with OM
*/
static event_handler m_evh;
/**
* Enquue commonds to the VPP command Q for the update
*/
void update(const binding& obj);
/**
* Find or Add the instance in the DB
*/
static std::shared_ptr<binding> find_or_add(const binding& temp)
{
return (m_db.find_or_add(
std::make_pair(temp.m_direction, temp.m_itf->key()), temp));
}
/*
* It's the OM class that calls singular()
*/
friend class VOM::OM;
/**
* It's the singular_db class that calls replay()
*/
friend class singular_db<key_t, binding>;
/**
* Sweep/reap the object if still stale
*/
void sweep(void);
/**
* Replay the objects state to HW
*/
void replay(void);
/**
* The direction the of the packets on which to apply the ACL
* input or output
*/
const direction_t m_direction;
/**
* A reference counting pointer the interface that this L3 layer
* represents. By holding the reference here, we can guarantee that
* this object will outlive the interface
*/
const std::shared_ptr<interface> m_itf;
/**
* A reference counting pointer the ACL that this
* interface is bound to. By holding the reference here, we can
* guarantee that this object will outlive the BD.
*/
const std::shared_ptr<LIST> m_acl;
/**
* HW configuration for the binding. The bool representing the
* do/don't bind.
*/
HW::item<bool> m_binding;
/**
* A map of all L2 interfaces key against the interface's handle_t
*/
static singular_db<key_t, binding> m_db;
};
/**
* Typedef the L3 binding type
*/
typedef binding<l3_list> l3_binding;
/**
* Typedef the L2 binding type
*/
typedef binding<l2_list> l2_binding;
/**
* Definition of the static Singular DB for ACL bindings
*/
template <typename LIST>
singular_db<typename ACL::binding<LIST>::key_t, ACL::binding<LIST>>
binding<LIST>::m_db;
template <typename LIST>
typename ACL::binding<LIST>::event_handler binding<LIST>::m_evh;
namespace {
const static dependency_t __attribute__((unused)) l2o = l2_binding::order();
const static dependency_t __attribute__((unused)) l3o = l3_binding::order();
};
};
std::ostream& operator<<(std::ostream& os,
const std::pair<direction_t, interface::key_t>& key);
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "mozilla")
* End:
*/
#endif
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