I have been running some surveys with the Atheros and Broadcom Drivers.
When viewing the frames from wireshark , while in monitor mode, I
noticed that the Atheros driver is reporting FCS errors on some frames,
but the Broadcom driver isn't, in the radiotap header. If I expand the
frame and look at the FCS wireshark reports the frame as bad and shows
what the CRC should be. I put printk's in pio_rx_frame() (see below) and
noticed that the macstat is being reported as zero. Does this mean that
the status is not being sent to the driver from the chip or firmware? Is
there some way for me to configure it to report bad FCS frames?
macstat = le32_to_cpu(rxhdr.mac_status);
printk (KERN_DEBUG "pio_rx_frame macstat is %x\n", macstat);
if (macstat & B43_RX_MAC_FCSERR) {
if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) {
/* Drop frames with failed FCS. */
err_msg = "Frame FCS error";
goto rx_error;
}
b43_op_configure filter has the following flags set:
*fflags &= FIF_PROMISC_IN_BSS |
FIF_ALLMULTI |
FIF_FCSFAIL |
FIF_PLCPFAIL |
FIF_CONTROL |
FIF_OTHER_BSS |
FIF_BCN_PRBRESP_PROMISC;
changed &= FIF_PROMISC_IN_BSS |
FIF_ALLMULTI |
FIF_FCSFAIL |
FIF_PLCPFAIL |
FIF_CONTROL |
FIF_OTHER_BSS |
FIF_BCN_PRBRESP_PROMISC;
Thanks much
Tex
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