On Tue, Nov 24, 2020 at 1:40 AM Martin Schiller <ms@xxxxxxxxxx> wrote: > > This patch allows layer2 (LAPB) to react to netdev events itself and > avoids the detour via layer3 (X.25). > > 1. Establish layer2 on NETDEV_UP events, if the carrier is already up. > > 2. Call lapb_disconnect_request() on NETDEV_GOING_DOWN events to signal > the peer that the connection will go down. > (Only when the carrier is up.) > > 3. When a NETDEV_DOWN event occur, clear all queues, enter state > LAPB_STATE_0 and stop all timers. > > 4. The NETDEV_CHANGE event makes it possible to handle carrier loss and > detection. > > In case of Carrier Loss, clear all queues, enter state LAPB_STATE_0 > and stop all timers. > > In case of Carrier Detection, we start timer t1 on a DCE interface, > and on a DTE interface we change to state LAPB_STATE_1 and start > sending SABM(E). > > Signed-off-by: Martin Schiller <ms@xxxxxxxxxx> Acked-by: Xie He <xie.he.0141@xxxxxxxxx> Thanks!
