Using the HTTP server via TAP

[Peter Nguyen]

BTW, this is the output from dhcpd3.

Wrote 2 leases to leases file.
Listening on LPF/tap0/de:64:1c:dc:00:f4/10.0.0/24
Sending on   LPF/tap0/de:64:1c:dc:00:f4/10.0.0/24
Sending on   Socket/fallback/fallback-net
DHCPDISCOVER from 52:54:00:12:34:56 via tap0
DHCPOFFER on 10.0.0.17 to 52:54:00:12:34:56 via tap0
DHCPREQUEST for 10.0.0.17 (10.0.0.1) from 52:54:00:12:34:56 via tap0
DHCPACK on 10.0.0.17 to 52:54:00:12:34:56 via tap0

Also, this is the command i used to execute the web server via qemu:

sudo qemu -m 128 -serial stdio -no-kqemu -hda c.img -net nic,model=pcnet -net
tap,ifname=tap0,macaddr=00:81:71:61:51:41,script=no,downscript=no

It seems to me that the dhcp output is always the same, even if i use the
"02-00-00-00-00-01" mac address.

Peter


Quoting "mx at ...19..." <mx at ...19...>:

> Hi Peter,
> Â 
> I'm not sure if I've got your setup right or not.
> Â 
> You have a host operating system (guess linux) with two qemu instances, one
> running Windows XP and the other running genode with the webserver.
> Â 
> Your host system also runs a dhcp server which assigns the same ip address to
> both qemu instances.
> Â 
> This assignment could be caused by the fact that both qemu instances have the
> same mac address.
> Â 
> The 10.02 release notes state that the nic driver "fakes an ethernet NIC with
> the MAC address 02-00-00-00-00-01". Where could that MAC address come from?
> The
> driver obtains it from qemu in dde_tx_handler:
> Â 
> dde_linux26_net_get_mac_addr(1, (unsigned char*)_mac_addr.addr);
> Â 
> Â 
> This schould be exactly that MAC address you shoud have configured when
> starting
> up qemu (did you?):
> Â 
> This could look like "-net nic,model=pcnet,macaddr=00:81:71:61:51:41"
> Â 
> Perhaps you forgot this step?
> Â 
> If you haven't, it would be helpful if you provided a Wireshark trace taken
> from
> your tap interface.
> Â 
> Cheers
> Â 
> Sven
> Â 
>
> Peter Nguyen <petern at ...34...> hat am 2. Juni 2010 um 05:04
> geschrieben:
>
> > Hi,
> >
> > I was just wondering in using TAP with the HTTP server (and following
> > the instructions in the genode 10.02 documentation), i've noticed that
> > when i have multiple connections to the server, whereby i have a windows
> > xp virtual machine making requests to the server in addition to the host
> > operating system (the XP vm is running in qemu as well as the web
> > server), the IP addresses that the web server obtains are always the
> > same regardless of the machine making the requests. Does anyone know how
> > to provide unique IP addresses for each VM ie. is there an option i
> > can/need to specify when i run qemu? or is there something i have to do
> > with dhcpd3 or the conf,pid or lease files to ensure this functionality.
> >
> > Thanks
> > Peter
> >
> >
> ------------------------------------------------------------------------------
> >
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> > Genode-main at lists.sourceforge.net
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> Â 
> --
> Sven Fülster