Em Quinta, 23 de Novembro de 2006 16:02, escreveu:
> Jorge Almeida wrote:
> >
> > Hello Jan,
> >
> > I'm trying to implement an easy way of monitoring the link beat of one
board.
> >
> > What i want is to pass the index of the board, and internaly call the
> > "do_ioctl" function that should be initialialized in the rtnet_device
struct
> > for each device.
> >
> > My question is, How do i call the do_ioctl function using the file
descriptor
> > of one socket that is open passing the number of the if_index (or the
> > interface name)? And how rtnet knows wath device to call?
>
> IOCTLs on RTDM sockets come in over the related protocol handler, see
> e.g. this one for packet sockets:
>
>
http://www.rts.uni-hannover.de/rtnet/lxr/source/stack/packet/af_packet.c#L240
>
> From there on you can easily go down the chain.
>
> As the IOCTLs are per-socket and not per-device, you have to provide the
> information about the address device within the request packet. Do you
> have some Linux data structure you can reuse for it? Something like for
> SIOCGIFINDEX?
Yes, i have the struct ifreq used for the SIOCGIFINDEX ioctl.
I was checking the code and the path is something like this:
1 Start at "rt_packet_ioctl" (af_packet.c) checking for a new type of
ioctl
"RTIOC_TYPE_MONITORING"
2 send it to a new function in socket.c "rt_socket_monitoring_ioctl"
3 check the device that we are trying to check the link beat
4 send it to the driver (rt_8139too.c) with the do_ioctl pointer.
In this i only have one doubt:
Where do i return the result?
Maybe the solution:
Build a new struct in RTnet has support of the monitoring IOCTLS
(just for now ) something like
struct SDeviceMonit
{
int nDeviceIndex;
int nLinkBeat;
}
This way i can identify the device (nDeviceIndex;) and get the result
(nLinkBeat;).
Any sugestion??!!
Thanks
>
> Jan
>
>
--
Jorge Almeida
[EMAIL PROTECTED]
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