address

• 功能：提供使用 ipv4 和 ipv6 地址的能力。同时提供了许多实用转换方法。

1 address 成员

class address
{
  ... 省略 ... 
private:
  // The type of the address.
  enum { ipv4, ipv6 } type_;

  // The underlying IPv4 address.
  asio::ip::address_v4 ipv4_address_;

  // The underlying IPv6 address.
  asio::ip::address_v6 ipv6_address_;
};

2 address 方法

address 类提供了很多方法，比如点分 ip 地址转 address。

class
{
  ... 省略 ... 
  /// Get whether the address is an IP version 4 address.
  bool is_v4() const ASIO_NOEXCEPT
  {
    return type_ == ipv4;
  }

  /// Get whether the address is an IP version 6 address.
  bool is_v6() const ASIO_NOEXCEPT
  {
    return type_ == ipv6;
  }

  /// Get the address as an IP version 4 address.
  ASIO_DECL asio::ip::address_v4 to_v4() const;

  /// Get the address as an IP version 6 address.
  ASIO_DECL asio::ip::address_v6 to_v6() const;

  /// Get the address as a string.
  ASIO_DECL std::string to_string() const;

#if !defined(ASIO_NO_DEPRECATED)
  /// (Deprecated: Use other overload.) Get the address as a string.
  ASIO_DECL std::string to_string(asio::error_code& ec) const;

  /// (Deprecated: Use make_address().) Create an address from an IPv4 address
  /// string in dotted decimal form, or from an IPv6 address in hexadecimal
  /// notation.
  static address from_string(const char* str);
  ... 省略 ...   
}