transport.h

/* Copyright 2013-present Barefoot Networks, Inc.
 *
 * 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.
 */
 
/*
 * Antonin Bas (antonin@barefootnetworks.com)
 *
 */
 
#ifndef BM_BM_SIM_TRANSPORT_H_
#define BM_BM_SIM_TRANSPORT_H_
 
#include <bm/config.h>
 
#include <string>
#include <initializer_list>
#include <memory>
 
namespace bm {
 
class TransportIface {
 public:
  struct MsgBuf {
    char *buf;
    unsigned int len;
  };
 
 public:
  virtual ~TransportIface() { }
 
  int open() {
    if (opened) return 1;
    opened = true;
    return open_();
  }
 
  int send(const std::string &msg) const {
    return send_(msg);
  }
 
  int send(const char *msg, int len) const {
    return send_(msg, len);
  }
 
  int send_msgs(const std::initializer_list<std::string> &msgs) const {
    return send_msgs_(msgs);
  }
 
  int send_msgs(const std::initializer_list<MsgBuf> &msgs) const {
    return send_msgs_(msgs);
  }
 
#ifdef BM_NANOMSG_ON
  static std::unique_ptr<TransportIface> make_nanomsg(const std::string &addr);
#endif
  static std::unique_ptr<TransportIface> make_dummy();
  static std::unique_ptr<TransportIface> make_stdout();
 
 private:
  virtual int open_() = 0;
 
  virtual int send_(const std::string &msg) const = 0;
  virtual int send_(const char *msg, int len) const = 0;
 
  virtual int send_msgs_(
      const std::initializer_list<std::string> &msgs) const = 0;
  virtual int send_msgs_(const std::initializer_list<MsgBuf> &msgs) const = 0;
 
  bool opened{false};
};
 
}  // namespace bm
 
#endif  // BM_BM_SIM_TRANSPORT_H_