329 lines
13 KiB
C++
329 lines
13 KiB
C++
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////////////////////////////////////////////////////////////
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//
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// SFML - Simple and Fast Multimedia Library
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// Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
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//
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// This software is provided 'as-is', without any express or implied warranty.
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// In no event will the authors be held liable for any damages arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it freely,
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// subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented;
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// you must not claim that you wrote the original software.
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// If you use this software in a product, an acknowledgment
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// in the product documentation would be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such,
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// and must not be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source distribution.
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//
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////////////////////////////////////////////////////////////
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#ifndef SFML_IPADDRESS_HPP
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#define SFML_IPADDRESS_HPP
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////////////////////////////////////////////////////////////
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// Headers
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////////////////////////////////////////////////////////////
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#include <SFML/Network/Export.hpp>
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#include <SFML/System/Time.hpp>
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#include <istream>
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#include <ostream>
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#include <string>
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namespace sf
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{
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////////////////////////////////////////////////////////////
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/// \brief Encapsulate an IPv4 network address
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///
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////////////////////////////////////////////////////////////
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class SFML_NETWORK_API IpAddress
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{
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public:
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////////////////////////////////////////////////////////////
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/// \brief Default constructor
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///
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/// This constructor creates an empty (invalid) address
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///
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////////////////////////////////////////////////////////////
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IpAddress();
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////////////////////////////////////////////////////////////
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/// \brief Construct the address from a string
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///
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/// Here \a address can be either a decimal address
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/// (ex: "192.168.1.56") or a network name (ex: "localhost").
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///
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/// \param address IP address or network name
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///
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////////////////////////////////////////////////////////////
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IpAddress(const std::string& address);
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////////////////////////////////////////////////////////////
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/// \brief Construct the address from a string
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///
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/// Here \a address can be either a decimal address
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/// (ex: "192.168.1.56") or a network name (ex: "localhost").
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/// This is equivalent to the constructor taking a std::string
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/// parameter, it is defined for convenience so that the
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/// implicit conversions from literal strings to IpAddress work.
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///
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/// \param address IP address or network name
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///
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////////////////////////////////////////////////////////////
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IpAddress(const char* address);
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////////////////////////////////////////////////////////////
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/// \brief Construct the address from 4 bytes
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///
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/// Calling IpAddress(a, b, c, d) is equivalent to calling
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/// IpAddress("a.b.c.d"), but safer as it doesn't have to
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/// parse a string to get the address components.
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///
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/// \param byte0 First byte of the address
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/// \param byte1 Second byte of the address
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/// \param byte2 Third byte of the address
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/// \param byte3 Fourth byte of the address
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///
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////////////////////////////////////////////////////////////
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IpAddress(Uint8 byte0, Uint8 byte1, Uint8 byte2, Uint8 byte3);
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////////////////////////////////////////////////////////////
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/// \brief Construct the address from a 32-bits integer
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///
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/// This constructor uses the internal representation of
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/// the address directly. It should be used for optimization
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/// purposes, and only if you got that representation from
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/// IpAddress::toInteger().
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///
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/// \param address 4 bytes of the address packed into a 32-bits integer
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///
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/// \see toInteger
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///
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////////////////////////////////////////////////////////////
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explicit IpAddress(Uint32 address);
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////////////////////////////////////////////////////////////
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/// \brief Get a string representation of the address
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///
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/// The returned string is the decimal representation of the
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/// IP address (like "192.168.1.56"), even if it was constructed
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/// from a host name.
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///
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/// \return String representation of the address
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///
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/// \see toInteger
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///
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////////////////////////////////////////////////////////////
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std::string toString() const;
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////////////////////////////////////////////////////////////
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/// \brief Get an integer representation of the address
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///
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/// The returned number is the internal representation of the
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/// address, and should be used for optimization purposes only
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/// (like sending the address through a socket).
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/// The integer produced by this function can then be converted
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/// back to a sf::IpAddress with the proper constructor.
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///
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/// \return 32-bits unsigned integer representation of the address
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///
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/// \see toString
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///
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////////////////////////////////////////////////////////////
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Uint32 toInteger() const;
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////////////////////////////////////////////////////////////
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/// \brief Get the computer's local address
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///
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/// The local address is the address of the computer from the
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/// LAN point of view, i.e. something like 192.168.1.56. It is
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/// meaningful only for communications over the local network.
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/// Unlike getPublicAddress, this function is fast and may be
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/// used safely anywhere.
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///
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/// \return Local IP address of the computer
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///
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/// \see getPublicAddress
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///
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////////////////////////////////////////////////////////////
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static IpAddress getLocalAddress();
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////////////////////////////////////////////////////////////
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/// \brief Get the computer's public address
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///
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/// The public address is the address of the computer from the
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/// internet point of view, i.e. something like 89.54.1.169.
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/// It is necessary for communications over the world wide web.
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/// The only way to get a public address is to ask it to a
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/// distant website; as a consequence, this function depends on
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/// both your network connection and the server, and may be
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/// very slow. You should use it as few as possible. Because
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/// this function depends on the network connection and on a distant
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/// server, you may use a time limit if you don't want your program
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/// to be possibly stuck waiting in case there is a problem; this
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/// limit is deactivated by default.
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///
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/// \param timeout Maximum time to wait
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///
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/// \return Public IP address of the computer
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///
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/// \see getLocalAddress
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///
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////////////////////////////////////////////////////////////
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static IpAddress getPublicAddress(Time timeout = Time::Zero);
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////////////////////////////////////////////////////////////
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// Static member data
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////////////////////////////////////////////////////////////
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static const IpAddress None; ///< Value representing an empty/invalid address
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static const IpAddress Any; ///< Value representing any address (0.0.0.0)
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static const IpAddress LocalHost; ///< The "localhost" address (for connecting a computer to itself locally)
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static const IpAddress Broadcast; ///< The "broadcast" address (for sending UDP messages to everyone on a local network)
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private:
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friend SFML_NETWORK_API bool operator <(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Resolve the given address string
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///
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/// \param address Address string
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///
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////////////////////////////////////////////////////////////
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void resolve(const std::string& address);
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////////////////////////////////////////////////////////////
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// Member data
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////////////////////////////////////////////////////////////
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Uint32 m_address; ///< Address stored as an unsigned 32 bits integer
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bool m_valid; ///< Is the address valid?
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};
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////////////////////////////////////////////////////////////
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/// \brief Overload of == operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if both addresses are equal
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator ==(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of != operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if both addresses are different
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator !=(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of < operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if \a left is lesser than \a right
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator <(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of > operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if \a left is greater than \a right
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator >(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of <= operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if \a left is lesser or equal than \a right
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator <=(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of >= operator to compare two IP addresses
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///
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/// \param left Left operand (a IP address)
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/// \param right Right operand (a IP address)
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///
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/// \return True if \a left is greater or equal than \a right
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API bool operator >=(const IpAddress& left, const IpAddress& right);
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////////////////////////////////////////////////////////////
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/// \brief Overload of >> operator to extract an IP address from an input stream
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///
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/// \param stream Input stream
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/// \param address IP address to extract
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///
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/// \return Reference to the input stream
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API std::istream& operator >>(std::istream& stream, IpAddress& address);
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////////////////////////////////////////////////////////////
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/// \brief Overload of << operator to print an IP address to an output stream
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///
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/// \param stream Output stream
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/// \param address IP address to print
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///
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/// \return Reference to the output stream
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///
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////////////////////////////////////////////////////////////
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SFML_NETWORK_API std::ostream& operator <<(std::ostream& stream, const IpAddress& address);
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} // namespace sf
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#endif // SFML_IPADDRESS_HPP
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////////////////////////////////////////////////////////////
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/// \class sf::IpAddress
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/// \ingroup network
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///
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/// sf::IpAddress is a utility class for manipulating network
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/// addresses. It provides a set a implicit constructors and
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/// conversion functions to easily build or transform an IP
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/// address from/to various representations.
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///
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/// Usage example:
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/// \code
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/// sf::IpAddress a0; // an invalid address
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/// sf::IpAddress a1 = sf::IpAddress::None; // an invalid address (same as a0)
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/// sf::IpAddress a2("127.0.0.1"); // the local host address
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/// sf::IpAddress a3 = sf::IpAddress::Broadcast; // the broadcast address
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/// sf::IpAddress a4(192, 168, 1, 56); // a local address
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/// sf::IpAddress a5("my_computer"); // a local address created from a network name
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/// sf::IpAddress a6("89.54.1.169"); // a distant address
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/// sf::IpAddress a7("www.google.com"); // a distant address created from a network name
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/// sf::IpAddress a8 = sf::IpAddress::getLocalAddress(); // my address on the local network
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/// sf::IpAddress a9 = sf::IpAddress::getPublicAddress(); // my address on the internet
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/// \endcode
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///
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/// Note that sf::IpAddress currently doesn't support IPv6
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/// nor other types of network addresses.
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///
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////////////////////////////////////////////////////////////
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