recvmsg on AsyncSocket

[AMIGrAve]

Hi,

I'm trying to pass a file descriptor from a python program to a nim program but 
I can't find a way to do it:
    
    
    # the server is created like this:
    # var server = newAsyncSocket(AF_UNIX, SOCK_STREAM, IPPROTO_IP)
    # server.bindUnix("\0proxy")
    # and the client socket is dispatched to a processClient function
    
    proc processClient(client: AsyncSocket) {.async.} =
        var buf: cstring
        let n = client.recvmsg(addr buf, 4096)
    
    
    Run

but the compilation error is:
    
    
    Error: attempting to call undeclared routine: 'recvmsg'
    
    
    Run

So I guess that recvmsg is not defined for async sockets, is this expected/not 
yet implemented ?

I tried to google for an example of message passing with a file descriptor 
through an async socket but I could not find one.

Is it possible to do such a thing in nim ?