Hello, aahringo@xxxxxxxxxx wrote on Fri, 27 Jan 2023 20:57:08 -0500: > Hi, > > On Fri, Jan 27, 2023 at 2:52 PM Michael Richardson <mcr@xxxxxxxxxxxx> wrote: > > > > > > Alexander Aring <aahringo@xxxxxxxxxx> wrote: > > >> - MLME ops without feedback constraints like beacons -> should go > > >> through the hot path, but not through the whole net stack, so > > >> ieee802154_subif_start_xmit() > > >> > > > > > it will bypass the qdisc handling (+ some other things which are around > > > there). The current difference is what I see llsec handling and other > > > things which might be around there? Not exactly, because llsec handling is not done in the net/ stack, but right inside the ieee802154 transmit callbacks, so I'd say it will be quite easy to tweak when we have a clear view of what we want in terms of encryption/integrity checking/signatures. > > > It depends if other "MLME-ops" need > > > to be e.g. encrypted or not. > > > > I haven't followed the whole thread. > > So I am neither agreeing nor disagreeing, just clarifying. > > Useful beacons are "signed" (have integrity applied), but not encrypted. > > > > I see. But that means they need to be going through llsec, just the > payload isn't encrypted and the MIC is appended to provide integrity. > > > It's important for userspace to be able to receive them, even if we don't > > have a key that can verify them. AFAIK, we have no specific interface to > > receive beacons. > > > > This can be done over multiple ways. Either over a socket > communication or if they appear rarely we can put them into a netlink > event. In my opinion we already put that in a higher level API in > passive scan to interpret the receiving of a beacon on kernel level > and trigger netlink events. Indeed. > I am not sure how HardMAC transceivers handle them on the transceiver > side only or if they ever provide them to the next layer or not? > For SoftMAC you can actually create a AF_PACKET raw socket, and you > should see everything which bypass hardware address filters and kernel > filters. Then an application can listen to them. Thanks, Miquèl
