--- /dev/null
+/*
+ * 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_INTERFACE_SPAN_H__
+#define __VOM_INTERFACE_SPAN_H__
+
+#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 {
+/**
+ * A representation of interface span configuration
+ */
+class interface_span : public object_base
+{
+public:
+ /**
+ * The state of the interface - rx/tx or both to be mirrored
+ */
+ struct state_t : enum_base<state_t>
+ {
+ /**
+ * DISABLED state
+ */
+ const static state_t DISABLED;
+ /**
+ * RX enable state
+ */
+ const static state_t RX_ENABLED;
+ /**
+ * TX enable state
+ */
+ const static state_t TX_ENABLED;
+ /**
+ * TX and RX enable state
+ */
+ const static state_t TX_RX_ENABLED;
+
+ /**
+ * Convert VPP's numerical value to enum type
+ */
+ static state_t from_int(uint8_t val);
+
+ private:
+ /**
+ * Private constructor taking the value and the string name
+ */
+ state_t(int v, const std::string& s);
+ };
+
+ /**
+ * Construct a new object matching the desried state
+ *
+ * @param itf_from - The interface to be mirrored
+ * @param itf_to - The interface where the traffic is mirrored
+ */
+ interface_span(const interface& itf_from,
+ const interface& itf_to,
+ state_t state);
+
+ /**
+ * Copy Constructor
+ */
+ interface_span(const interface_span& o);
+
+ /**
+ * Destructor
+ */
+ ~interface_span();
+
+ /**
+ * Return the 'singular instance' of the interface_span that matches
+ * this object
+ */
+ std::shared_ptr<interface_span> singular() const;
+
+ /**
+ * convert to string format for debug purposes
+ */
+ std::string to_string() const;
+
+ /**
+ * Dump all interface_spans into the stream provided
+ */
+ static void dump(std::ostream& os);
+
+ /**
+ * The key type for interface_spans
+ */
+ typedef std::pair<interface::key_t, interface::key_t> key_t;
+
+ /**
+ * Find a singular instance in the DB for the interface passed
+ */
+ static std::shared_ptr<interface_span> find(const interface& i);
+
+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 interface_span& obj);
+
+ /**
+ * Find or add the singular instance in the DB
+ */
+ static std::shared_ptr<interface_span> find_or_add(
+ const interface_span& temp);
+
+ /*
+ * It's the VPPHW class that updates the objects in HW
+ */
+ friend class OM;
+
+ /**
+ e* It's the singular_db class that calls replay()
+ */
+ friend class singular_db<key_t, interface_span>;
+
+ /**
+ * Sweep/reap the object if still stale
+ */
+ void sweep(void);
+
+ /**
+ * replay the object to create it in hardware
+ */
+ void replay(void);
+
+ /**
+ * A reference counting pointer the interface to be mirrored
+ */
+ const std::shared_ptr<interface> m_itf_from;
+ /**
+ * A reference counting pointer the interface where the traffic is
+ * mirrored
+ */
+ const std::shared_ptr<interface> m_itf_to;
+
+ /**
+ * the state (rx, tx or both) of the interface to be mirrored
+ */
+ const state_t m_state;
+
+ /**
+ * HW configuration for the binding. The bool representing the
+ * do/don't bind.
+ */
+ HW::item<bool> m_config;
+
+ /**
+ * A map of all interface span keyed against the interface to be
+ * mirrored.
+ */
+ static singular_db<key_t, interface_span> m_db;
+};
+
+/**
+ * Ostream output for the key
+ */
+std::ostream& operator<<(std::ostream& os, const interface_span::key_t& key);
+};
+
+/*
+ * fd.io coding-style-patch-verification: OFF
+ *
+ * Local Variables:
+ * eval: (c-set-style "mozilla")
+ * End:
+ */
+
+#endif
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