Hello, I've written a program that uses UDP as its communication with other processes. It was built with GHC 6.4.1 on MacOS 10.4 (PowerPC) and works fine. When I moved the code to a Linux box (i386) and built it with GHC 6.6, it didn't work. The problems turns out to be, apparently, an endian problem. The socket is created with the following snippet: allocSocket :: IO Socket allocSocket = do { s <- socket AF_INET Datagram 0 ; handle (\e -> sClose s >> throwIO e) $ do { connect s (SockAddrInet 6802 0x7f000001) ; return s } } On the Macintosh, the socket only receives packets from 127.0.0.1:6802, which is correct (and works). On the Linux machine, the socket only accepts packets from 1.0.0.127:6802. The data constructor SockAddrInet doesn't swap the bytes of the address (although it correctly swaps the bytes of the port number!) Changing the data constructor call to (SockAddrInet 6802 0x0100007f) makes it work on Linux, but not on MacOS 10.4. (You can see what the socket is bound to, on Linux, with "netstat -aun".) I don't have access to GHC 6.4.1 on a Linux box to determine whether this is a regression in 6.6 or simply an overlooked detail. Should I file a PR? Am I doing something wrong? -- Rich AIM : rnezzy ICQ : 174908475