[Haskell-beginners] listenOn specific IP

vold voldermort at hotmail.com
Tue Jul 30 15:49:15 CEST 2013

vold <voldermort <at> hotmail.com> writes:

> I'm trying to write a simple server with network. listenOn takes a
> socket number, but tries to bind to every available IP, which isn't what I
> need. How do I tell it to bind to a specific address?

I did this eventually by writing my own copy of the listenOn function

listenOn' host (PortNumber port) = do
    proto <- getProtocolNumber "tcp"
        (socket AF_INET Stream proto)
        (\sock -> do
            setSocketOption sock ReuseAddr 1
            bindSocket sock (SockAddrInet port host)
            listen sock maxListenQueue
            return sock

It feels very hacky though.

More information about the Beginners mailing list