#pragma once #include #include #include #include #include namespace llarp { /// A struct that can represent either an IPv4 or IPv6 address. It is meant for representation /// purposes only (e.g. serialization/deserialization). In addition, it also optionally stores /// a port. /// /// As a convenience, it can produce a SockAddr for dealing with network libraries which depend /// sockaddr structs. However, it does not keep this as a member variable and isn't responsible /// for its lifetime/memory/etc. /// /// TODO: IPv6 is not currently supported. struct IpAddress { /// Empty constructor. IpAddress() = default; /// move construtor IpAddress(IpAddress&&) = default; /// copy construct IpAddress(const IpAddress&); /// Constructor. Takes a string which can be an IPv4 or IPv6 address optionally followed by /// a colon and a port. /// /// Examples: /// /// 127.0.0.1 /// 1.2.3.4:53 /// /// Note that an IPv6 + port representation must be done in an unambiguous way, e.g. wrap the /// IP portion of the string in brackets: [IPv6Addr]:port /// /// @param str is a string representing an IP address and optionally a port /// @throws std::invalid_argument if str cannot be parsed IpAddress(std::string_view str); /// Constructor. Takes an IP address (as above) and a port. The string may not contain a port. /// /// @param str is a string representing an IP address and optionally a port /// @throws std::invalid_argument if str cannot be parsed IpAddress(std::string_view str, std::optional port); /// Construct from a SockAddr. /// /// @param addr is an SockAddr to initialize from. IpAddress(const SockAddr& addr); IpAddress& operator=(const sockaddr& other); /// move assignment IpAddress& operator=(IpAddress&& other); /// copy assignment IpAddress& operator=(const IpAddress& other); /// Return the port. Returns -1 if no port has been provided. /// /// @return the port, if present std::optional getPort() const; /// Return true if we have a port set otherwise return false bool hasPort() const; /// Set the port. /// /// @param port void setPort(std::optional port); /// Set the IP address. Follows the same logic as the constructor with the same signature, but /// doesn't overwrite the port if the port isn't present in the string. void setAddress(std::string_view str); void setAddress(std::string_view str, std::optional port); /// Returns true if this is an IPv4 address (or an IPv6 address representing an IPv4 address) /// /// TODO: could return an int (e.g. 4 or 6) or an enum /// /// @return true if this is an IPv4 address, false otherwise bool isIPv4(); /// Returns true if this represents a valid IpAddress, false otherwise. /// /// @return whether or not this IpAddress is empty bool isEmpty() const; /// Creates an instance of SockAddr representing this IpAddress. /// /// @return an instance of a SockAddr created from this IpAddress SockAddr createSockAddr() const; /// Returns true if this IpAddress is a bogon, false otherwise /// /// @return whether or not this IpAddress is a bogon bool isBogon() const; /// Returns a string representing this IpAddress /// /// @return string representation of this IpAddress std::string toString() const; std::string toHost() const; huint32_t toIP() const; // TODO: other utility functions left over from Addr which may be useful // IsBogon() const; // isPrivate() const; // struct Hash // to string / stream / etc bool operator<(const IpAddress& other) const; bool operator==(const IpAddress& other) const; struct Hash { std::size_t operator()(const IpAddress& address) const noexcept { return std::hash{}(address.toString()); } }; private: bool m_empty = true; std::string m_ipAddress; std::optional m_port = std::nullopt; }; std::ostream& operator<<(std::ostream& out, const IpAddress& address); } // namespace llarp