URTW driver and AHDEMO mode

[Nicolas Roosen]

Hi,

I'm  (successfully) using an ALFA AWUS036H usb wireless network adapter on 
FreeBSD 9.1, with the urtw driver.

I can monitor networks (using Kismet or airodump-ng), but there is something I 
can't do: inject packets to the device. And for one simple reason: this seems 
not to be supported by the driver (the AHDEMO mode isn't available).

Any idea how to add this capability in the source code?

Thanks!
Nicolas

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Virtio drivers and FreeBSD 9.1

[Nicolas Roosen]

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Hello everybody,

I have some trouble with the following configuration:

- - a Samsung SSD 840 Pro drive of 128 GB
- - a Debian Wheezy (7.1) as a KVM host
- - multiple Debian 7.1 and FreeBSD 9.1 guests on top of it


I have installed the virtio drivers (from
http://people.freebsd.org/~kuriyama/virtio/) on all guests, and
configured the KVM domain.xml files accordingly.

Then I ran some I/O tests using iozone. And as you can see on the
results below, there is a big difference between the Debian guest and
the FreeBSD guest.

Is there any option I could have forgotten to set up in FreeBSD that
could explain this difference?


On the host server:

iozone -s 64M -r 4k -i 0 -i 1 -i 2

random  random
KB  reclen   write rewritereadrereadreadwrite
655364  258532  553602   922146   969225 1523242  530324


On the FreeBSD guest:
random  random
KB  reclen   write rewritereadrereadreadwrite
655364   61687  128261   574681   580237  537510   20690


On the Debian guest:
random  random
KB  reclen   write rewritereadrereadreadwrite
655364  119604  481670   878853   935172 1328093  473255


Thank you.

- -- 
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