On Mon, May 24, 2021 at 02:19:20PM +0200, Martin Husemann wrote: > Hey folks, > > I am slightly confused about the bpf details for wireless devices.
... and once you have seen it work, it all unriddles. So I made two errors: - I picked run(4) as a test example, but radiotap support (kinda obvious once you think of it) is device dependent - and the run driver does not support it. The device driver needs to set ic_th (the tap header and properly initialize the length field before finalizing attachment. - I was confused by the mumbling of tcpdump about monitor mode and somehow assumed different/more link layer types would be available in monitor mode (which IIUC [now] never is the case in FreeBSD) and then totaly confused radiotap bpf access with monitor mode VAPs, but of course they are orthogonal/independent. Sorry for the noise. Martin _______________________________________________ freebsd-wireless@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
