Hello,

I am writing a devnp ethernet network driver for a usb based card. No shim.
I am using the qnx usb stack and the corresponding usbd_...() api.

The usb stack calls back when there is an ethernet packet to be received. In this routine I got a packet in my hand, I 
create an mbuf, stuff it, and hand it over to io-pkt-v4 with (*ifp->if_input)(ifp, m). WTP is zero because this is not 
an io-pkt-v4 registered thread (the usb stack client creates it underneath the qnx usbd_...() api, I don't have control 
over the thread).
WTP is null and the mbuf macros/functions use it. If I use the ..._wtp() macros/functions only I am OK in the driver but
 io-pkt-v4 crashes later at forwarding. Hmmm ...

Code:
static void hsoncusb_bulk_cbf( struct usbd_urb *urb, struct usbd_pipe *pipe, void *hdl )
{
...
                m = m_getcl_wtp(M_DONTWAIT, MT_DATA, M_PKTHDR, wtp);
                m_copyback(m, 0, hsoncusbdev->len_bulkin, hsoncusbdev->buffer_bulkin);
...
                ifp->if_ipackets++;
                (*ifp->if_input)(ifp, m);
...
}

How do you hand over (receive) an ethernet packet to io-pkt-v4 from a non-registered devnp driver thread correctly? Is 
there some sample code I can use?

Comments? Suggestions?

Thanks.
Andor
7/24/2009

--

Andor Nas
andor.nas@andrew.com