/// <summary>
/// Get the peer credentials from a given socket
/// </summary>
/// <param name="socket">Socket</param>
/// <param name="pid">Process ID</param>
/// <param name="uid">User ID</param>
/// <param name="gid">Group ID</param>
public static void GetPeerCredentials(this Socket socket, out int pid, out int uid, out int gid)
{
ucred cred = new ucred();
int credSize = Marshal.SizeOf <ucred>();
int error = Interop.getsockopt(socket.Handle.ToInt32(), Interop.SOL_SOCKET, Interop.SO_PEERCRED, ref cred, ref credSize);
if (error < 0)
{
throw new IOException($"Failed to query peer credentials (error {Marshal.GetLastWin32Error()})");
}
pid = cred.pid;
uid = cred.uid;
gid = cred.gid;
}
internal static extern int getsockopt(int sockfd, int level, int optname, ref ucred optval, ref int optlen);
