IPEndPointExtensions.cs

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using System.Net.Internals;
 
namespace System.Net.Sockets;
 
internal static class IPEndPointExtensions
{
    public static System.Net.Internals.SocketAddress Serialize(EndPoint endpoint)
    {
        if (endpoint is IPEndPoint iPEndPoint)
        {
            return new System.Net.Internals.SocketAddress(iPEndPoint.Address, iPEndPoint.Port);
        }
        SocketAddress address = endpoint.Serialize();
        return GetInternalSocketAddress(address);
    }
 
    public static EndPoint Create(this EndPoint thisObj, System.Net.Internals.SocketAddress socketAddress)
    {
        AddressFamily family = socketAddress.Family;
        if (family != thisObj.AddressFamily)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_InvalidAddressFamily, family.ToString(), thisObj.GetType().FullName, thisObj.AddressFamily.ToString()), "socketAddress");
        }
        switch (family)
        {
        case AddressFamily.InterNetwork:
        case AddressFamily.InterNetworkV6:
            if (socketAddress.Size < 8)
            {
                throw new ArgumentException(System.SR.Format(System.SR.net_InvalidSocketAddressSize, socketAddress.GetType().FullName, thisObj.GetType().FullName), "socketAddress");
            }
            return socketAddress.GetIPEndPoint();
        case AddressFamily.Unknown:
            return thisObj;
        default:
        {
            SocketAddress netSocketAddress = GetNetSocketAddress(socketAddress);
            return thisObj.Create(netSocketAddress);
        }
        }
    }
 
    private static System.Net.Internals.SocketAddress GetInternalSocketAddress(SocketAddress address)
    {
        System.Net.Internals.SocketAddress socketAddress = new System.Net.Internals.SocketAddress(address.Family, address.Size);
        for (int i = 0; i < address.Size; i++)
        {
            socketAddress[i] = address[i];
        }
        return socketAddress;
    }
 
    internal static SocketAddress GetNetSocketAddress(System.Net.Internals.SocketAddress address)
    {
        SocketAddress socketAddress = new SocketAddress(address.Family, address.Size);
        for (int i = 0; i < address.Size; i++)
        {
            socketAddress[i] = address[i];
        }
        return socketAddress;
    }
}