types.hpp

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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_TYPES_H__
#define __VOM_TYPES_H__

#include <array>
#include <vector>

#include <boost/asio/ip/address.hpp>

#include "vom/enum_base.hpp"

/**
 * Convenince wrapper macro for error handling in VAPI sends
 */
#define VAPI_CALL(_stmt)                                                       \
  {                                                                            \
    vapi_error_e _rv;                                                          \
    do {                                                                       \
      _rv = (_stmt);                                                           \
    } while (VAPI_OK != _rv);                                                  \
  }

namespace VOM {
/**
 * There needs to be a strict order in which object types are read from VPP
 *  (at boot time) and replayed to VPP (if VPP restarts). That ordering is
 * defined in this enum types
 */
enum class dependency_t
{
  /**
   * Global Configuration has no dependency
   */
  GLOBAL = 0,

  /**
   * interfaces are the root of the dependency graph
   */
  INTERFACE,

  /**
   * Tunnel or virtual interfaces next
   */
  TUNNEL,

  /**
   * Tables in which entries are added, e.g bridge/route-domains
   */
  TABLE,

  /**
   * ACLs
   */
  ACL,

  /**
   * Then L2/objects that bind to interfaces, BD, ACLS, etc
   */
  BINDING,

  /**
   * Entries in Tables
   */
  ENTRY,
};

/**
 * Error codes that VPP will return during a HW write
 */
struct rc_t : public enum_base<rc_t>
{
  rc_t(const rc_t& rc) = default;

  /**
   * Destructor
   */
  ~rc_t();

  /**
   * The value un-set
   */
  const static rc_t UNSET;

  /**
   * The HW write/update action was/has not been attempted
   */
  const static rc_t NOOP;

  /**
   * The HW write was successfull
   */
  const static rc_t OK;

  /**
   * HW write reported invalid input
   */
  const static rc_t INVALID;

  /**
   * HW write timedout - VPP did not respond within a timely manner
   */
  const static rc_t TIMEOUT;

  /**
   * Get the rc_t from the VPP API value
   */
  static const rc_t& from_vpp_retval(int32_t rv);

private:
  /**
   * Constructor
   */
  rc_t(int v, const std::string s);
};

/**
 * Feature Directions
 */
struct direction_t : public enum_base<direction_t>
{
  /**
   * Constructor
   */
  direction_t(int v, const std::string s);

  /**
   * Destructor
   */
  ~direction_t() = default;

  /**
   * Permit Direction
   */
  const static direction_t INPUT;

  /**
   * Deny Direction
   */
  const static direction_t OUTPUT;
};

/**
 * Output ostream for direction_t
 */
std::ostream& operator<<(std::ostream& os, const direction_t& dir);

/**
 * A type declaration of an interface handle in VPP
 */
struct handle_t
{
  /**
   * Constructor
   */
  handle_t(int value);

  /**
   * Constructor
   */
  handle_t();

  /**
   * convert to string format for debug purposes
   */
  std::string to_string() const;

  /**
   * Comparison operator
   */
  bool operator==(const handle_t& other) const;

  /**
   * Comparison operator
   */
  bool operator!=(const handle_t& other) const;

  /**
   * less than operator
   */
  bool operator<(const handle_t& other) const;

  /**
   * A value of an interface handle_t that means the itf does not exist
   */
  const static handle_t INVALID;

  /**
   * get the value of the handle
   */
  uint32_t value() const;

private:
  /**
   * VPP's handle value
   */
  uint32_t m_value;
};

/**
 * ostream print of a handle_t
 */
std::ostream& operator<<(std::ostream& os, const handle_t& h);

/**
 * Type def of a Ethernet address
 */
struct mac_address_t
{
  mac_address_t(uint8_t bytes[6]);
  mac_address_t(const std::string& str);
  mac_address_t(std::initializer_list<uint8_t> bytes);
  /**
   * Convert to byte array
   */
  void to_bytes(uint8_t* array, uint8_t len) const;

  /**
   * An all 1's MAC address
   */
  const static mac_address_t ONE;

  /**
   * An all 0's MAC address
   */
  const static mac_address_t ZERO;

  /**
   * Comparison operator
   */
  bool operator==(const mac_address_t& m) const;

  /**
   * less than operator
   */
  bool operator<(const mac_address_t& m) const;

  /**
   * String conversion
   */
  std::string to_string() const;

  /**
   * Underlying bytes array
   */
  std::array<uint8_t, 6> bytes;
};

/**
 * Type def of a L2 address as read from VPP
 */
struct l2_address_t
{
  l2_address_t(const uint8_t bytes[8], uint8_t n_bytes);
  l2_address_t(std::initializer_list<uint8_t> bytes);
  l2_address_t(const mac_address_t& mac);

  /**
   * Convert to byte array
   */
  void to_bytes(uint8_t* array, uint8_t len) const;

  /**
   * An all 1's L2 address
   */
  const static l2_address_t ONE;

  /**
   * An all 0's L2 address
   */
  const static l2_address_t ZERO;

  /**
   * Comparison operator
   */
  bool operator==(const l2_address_t& m) const;

  /**
   * Comparison operator
   */
  bool operator!=(const l2_address_t& m) const;

  /**
   * String conversion
   */
  std::string to_string() const;

  /**
   * MAC address conversion
   */
  mac_address_t to_mac() const;

  /**
   * Underlying bytes array - filled from least to most significant
   */
  std::vector<uint8_t> bytes;
};

/**
 * Ostream operator for a MAC address
 */
std::ostream& operator<<(std::ostream& os, const mac_address_t& mac);

/**
 * Ostream operator for a MAC address
 */
std::ostream& operator<<(std::ostream& os, const l2_address_t& l2);
};

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "mozilla")
 * End:
 */

#endif