accessing tcp/ip from a device driver

From: cuba five (cubafive_at_yahoo.com)
Date: 10/03/04

  • Next message: Mr K: "NetBsd/Cobalt Qube 2" 
    Date: 3 Oct 2004 10:01:20 -0700

    I am interested in learning the proper way to "talk" over TCP/IP from
    inside a device driver, i.e. like open a socket.

    I have Netbsd 1.6.2 installed and have read all the docs relating to
    device driver writing on netbsg.org; I have created and successfully
    tested a skeleton device driver and my next step is to simply call
    socket() and see what happens....

    But perhaps those with more wisdom than I can shed some light on this
    for me?

    I see ether_ifattach() or if_attach() but perhps those are only for
    ethernet drivers? (man ethersubr and man 9 arp are a little vague)

    For example, say I wanted a sample device driver that would ping
    another computer: open() - setup socket, ioctl(IP) - set IP address,
    read() - get ping results (but not continuous of course). (Not that
    anyone would want to do this, or that this is lame, but just as an
    example.)

    My problem, in learning netbsd, is that I like to see an API, i.e.
    here is a list of system calls one can make from inside a device
    driver:

     printf
     alloc
     bus_dmamem_alloc
     strcpy
     bus_space_read

    etc. Wouldn't it be nice to have a list of them all, just like Appedix
    B: Standard Library of K&R 2nd ed?

  • Next message: Mr K: "NetBsd/Cobalt Qube 2"

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