address.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#ifdef _WIN32
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <netinet/in.h>
#include <sys/socket.h>
#endif
 
#include <ostream>
#include <cstring>
#include "irrlichttypes.h"
#include "networkexceptions.h"
 
struct IPv6AddressBytes
{
        u8 bytes[16];
        IPv6AddressBytes() { memset(bytes, 0, 16); }
};
 
class Address
{
public:
        Address();
        Address(u32 address, u16 port);
        Address(u8 a, u8 b, u8 c, u8 d, u16 port);
        Address(const IPv6AddressBytes *ipv6_bytes, u16 port);
 
        bool operator==(const Address &address) const;
        bool operator!=(const Address &address) const { return !(*this == address); }
 
        int getFamily() const { return m_addr_family; }
        bool isValid() const { return m_addr_family != 0; }
        bool isIPv6() const { return m_addr_family == AF_INET6; }
        struct in_addr getAddress() const { return m_address.ipv4; }
        struct in6_addr getAddress6() const { return m_address.ipv6; }
        u16 getPort() const { return m_port; }
 
        void print(std::ostream &s) const;
        std::string serializeString() const;
 
        // Is this an address that binds to all interfaces (like INADDR_ANY)?
        bool isAny() const;
        // Is this an address referring to the local host?
        bool isLocalhost() const;
 
        // `name`: hostname or numeric IP
        // `fallback`: fallback IP to try gets written here
        // any empty name resets the IP to the "any address"
        // may throw ResolveError (address is unchanged in this case)
        void Resolve(const char *name, Address *fallback = nullptr);
 
        void setAddress(u32 address);
        void setAddress(u8 a, u8 b, u8 c, u8 d);
        void setAddress(const IPv6AddressBytes *ipv6_bytes);
        void setPort(u16 port);
 
private:
        unsigned short m_addr_family = 0;
        union
        {
                struct in_addr ipv4;
                struct in6_addr ipv6;
        } m_address;
        // port is separate from in_addr structures
        u16 m_port = 0;
};