可以使用Linux中的dotnet核心套接字访问SocketCan吗？

Question

我在Linux平台上使用dotnet核心，希望设置与CAN设备的通信。SocketCan在Linux平台上是可用的，但是有没有办法使用dotnet核心中的UnixDomainSocketEndPoint和Socket类来直接访问SocketCan呢？

在Linux (Debian9)环境下尝试使用此测试程序创建Socket实例时：

using System;
using System.Net.Sockets;

namespace SocketScan
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Scan for available ProtocolType values");

            ScanForProtocolTypes(SocketType.Stream);
            ScanForProtocolTypes(SocketType.Raw);
        }

        private static void ScanForProtocolTypes(SocketType socketType)
        {
            for (var i = 0; i < 1000000; i++)
            {
                try
                {
                    var socket = new Socket(AddressFamily.Unix, socketType, (ProtocolType)i);
                    Console.WriteLine($"Succeeded creating socket with SocketType={socketType} ProtocolType={((ProtocolType)i)}");
                }
                catch (SocketException)
                { }
            }
        }
    }
}

输出为：

$ dotnet run SocketTest.csproj 
Scan for available ProtocolType values
Succeeded creating socket with SocketType=Stream ProtocolType=Unspecified
Succeeded creating socket with SocketType=Stream ProtocolType=Icmp
Succeeded creating socket with SocketType=Raw ProtocolType=Unspecified
Succeeded creating socket with SocketType=Raw ProtocolType=Icmp

枚举AdressFamily、SocketType和ProtocolType的哪个值将与SocketCan套接字匹配？

Answer 1

在.NET核心3.0+上有AddressFamily.ControllerAreaNetwork和ProtocolFamily.ControllerAreaNetwork，而SocketCAN需要一个SocketType.Raw才能工作。在https://github.com/dotnet/corefx/pull/37315查看关联的拉取请求