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    SubjectRe: State of the Union: Wireless
    On Fri, Jan 06, 2006 at 12:31:24PM +0100, Johannes Berg wrote:
    > On Fri, 2006-01-06 at 12:00 +0100, Michael Buesch wrote:
    >
    > > * "master" interface as real device node
    > > * Virtual interfaces (net_devices)
    >
    > I didn't want to spam the netdev wiki with this (yet) so I collected
    > some more structured things outside. Anyone feel free to edit:
    > http://softmac.sipsolutions.net/802.11

    From someone who has no idea at all (yet) about 802.11: why character
    device, and not sysfs or configfs files? Like

    TASK: get list of MAC addresses available to hardware device (usually only one for current hw)

    cat /sys/devices/path/to/device/wireless/address

    TASK: get list of virtual devices including (some of) their properties

    ls -l /sys/devices/path/to/device/wireless/
    ...
    wlan0 -> /sys/class/net/wlan0
    wlan1 -> /sys/class/net/wlan1

    TASK: create virtual device (with arbitrary type, netdev name and mac address)
    ^^^^^^
    isn't nameif / udev for that?

    echo "$type" > /sys/devices/path/to/device/wireless/new_if
    ... we get uevents for this new interface; in this we can set the
    mac adress doing:
    echo "$mac" > /sys/class/net/wlan0/wireless/address

    TASK: configure virtual device (key is the device name since that needs to be unique anyway)

    echo "$some_config_option_for_virtual_device" > /sys/class/net/wlan0/wireless/some_option
    echo "$some_config_option_for_physical_device"> /sys/devices/path/to/dev/wireless/some_other_option


    Of course the configuration userspace tool would use libsysfs for that, not
    "echo" scripts... but they'd work too.

    Dominik
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