CommAddress.h

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/* -*- c++ -*-
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 3
 * of the License.
 *
 * Hypertable is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef AsyncComm_COMMADDRESS_H
#define AsyncComm_COMMADDRESS_H

#include <Common/InetAddr.h>
#include <Common/Logger.h>
#include <Common/String.h>

#include <functional>
#include <set>
#include <unordered_map>

namespace Hypertable {

  class CommAddress {
  public:

    enum AddressType { 
      NONE=0, 
      PROXY,  
      INET    
    };

    CommAddress() : m_type(NONE) { }

    CommAddress(const sockaddr_in addr) : m_type(INET) { inet=addr; }

    void set_proxy(const String &str) { proxy = str; m_type=PROXY; }

    void set_inet(sockaddr_in addr) { inet = addr; m_type=INET; }

    CommAddress &operator=(sockaddr_in addr) 
      { inet = addr; m_type=INET; return *this; }

    bool operator==(const CommAddress &other) const {
      if (m_type != other.m_type)
        return false;
      if (m_type == PROXY)
        return proxy.compare(other.proxy) == 0;
      else if (m_type == INET)
        return inet == other.inet;
      return true;
    }

    bool operator!=(const CommAddress &other) const {
      return !(*this == other);
    }

    bool operator<(const CommAddress &other) const {
      if (m_type != other.m_type)
        return m_type < other.m_type;
      if (m_type == PROXY)
        return proxy < other.proxy;
      else if (m_type == INET)
        return inet < other.inet;
      HT_ASSERT(m_type == NONE && other.m_type == NONE);
      return false;
    }

    bool is_proxy() const { return m_type == PROXY; }

    bool is_inet() const { return m_type == INET; }

    bool is_set() const { return m_type == PROXY || m_type == INET; }

    void clear() { proxy=""; m_type=NONE; }

    String to_str() const;
    
    String proxy;   
    InetAddr inet;  

  private:
    int32_t m_type; 
  };

  class CommAddressHash {
  public:
    size_t operator () (const CommAddress &addr) const {
      if (addr.is_inet())
        return (size_t)(addr.inet.sin_addr.s_addr ^ addr.inet.sin_port);
      else if (addr.is_proxy())
        return std::hash<std::string>()(addr.proxy);
      return 0;
    }
  };

  template<typename TypeT, typename addr=CommAddress>
  class CommAddressMap : public std::unordered_map<addr, TypeT, CommAddressHash> {
  };

  typedef std::set<CommAddress> CommAddressSet;
} // namespace Hypertable

#endif // AsyncComm_COMMADDRESS_H