[Q] About Unix Library of Ocaml

From: Bomshik Kim (bskim@ropas.kaist.ac.kr)
Date: Tue Feb 22 2000 - 08:29:52 MET

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     Hello~
     I Have Some Questions About Unix Library

    1) Why do these exceptions occur ?

    ----------------------------------------------------------
            Objective Caml version 2.04

    # open Unix ;;
    # let theSocket = socket PF_INET SOCK_STREAM 0 ;;
    val theSocket : Unix.file_descr = <abstr>
    # let theSocket = socket PF_INET SOCK_DGRAM 0 ;;
    val theSocket : Unix.file_descr = <abstr>
    # let theSocket = socket PF_INET SOCK_RAW 0 ;;
    Uncaught exception: Unix.Unix_error(1, "socket", "")
    # let theSocket = socket PF_INET SOCK_SEQPACKET 0 ;;
    Uncaught exception: Unix.Unix_error(45, "socket", "")
    #
    ----------------------------------------------------------

    2) What is the differences of 4 socket_type ?
     Stream socket, Datagram socket, Raw socket, Sequenced packets socket

    3) Error with using connection function

     Could you let me know the error code(63)
     and why does this error occur?

    -----------------------------------------------------------
            Objective Caml version 2.04

    # open Unix ;;
    # let addr = inet_addr_of_string "***.***.***.***" ;;
    val addr : Unix.inet_addr = <abstr>
    # let socketAddr = ADDR_INET( addr , 21 ) ;;
    val socketAddr : Unix.sockaddr = ADDR_INET (<abstr>, 21)
    # let theSocket = socket PF_INET SOCK_STREAM 0 ;;
    val theSocket : Unix.file_descr = <abstr>
    # connect theSocket socketAddr ;;
    Uncaught exception: Unix.Unix_error(63, "connect", "")
    -----------------------------------------------------------

    4) Where can I get more specific information(examples, docs, papers)
      about ocaml library especially unix library
      (in order to design & implement bigger network library of ocaml
       for building web-server, web-browser etc... )

    @ thank you
    -bskim@ropas.kaist.ac.kr



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