From: Martin Schiller ms@dev.tdt.de
[ Upstream commit 62480b992ba3fb1d7260b11293aed9d6557831c7 ]
1. DTE interface changes immediately to LAPB_STATE_1 and start sending SABM(E).
2. DCE interface sends N2-times DM and changes to LAPB_STATE_1 afterwards if there is no response in the meantime.
Signed-off-by: Martin Schiller ms@dev.tdt.de Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/lapb/lapb_timer.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/net/lapb/lapb_timer.c b/net/lapb/lapb_timer.c index 355cc3b6fa4d3..3d99205f003da 100644 --- a/net/lapb/lapb_timer.c +++ b/net/lapb/lapb_timer.c @@ -92,11 +92,18 @@ static void lapb_t1timer_expiry(unsigned long param) switch (lapb->state) {
/* - * If we are a DCE, keep going DM .. DM .. DM + * If we are a DCE, send DM up to N2 times, then switch to + * STATE_1 and send SABM(E). */ case LAPB_STATE_0: - if (lapb->mode & LAPB_DCE) + if (lapb->mode & LAPB_DCE && + lapb->n2count != lapb->n2) { + lapb->n2count++; lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE); + } else { + lapb->state = LAPB_STATE_1; + lapb_establish_data_link(lapb); + } break;
/*