wifi: mac80211_hwsim: send NDP for link (de)activation

In hwsim we now track when we receive NDP (or other frames
carrying a PM bit) to see if a link should be active, but
then of course we also need to transmit NDPs to at least
set a link to inactive when we deacivate it. Implement that
as well as sending an NDP when we activate a link, which
allows receiving frames before transmitting any.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 3e4ea6d..7bbc455 100644 (file)
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -2950,6 +2950,18 @@ static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
        hwsim_check_magic(vif);
        hwsim_check_chanctx_magic(ctx);
 
+       /* if we activate a link while already associated wake it up */
+       if (vif->type == NL80211_IFTYPE_STATION && vif->cfg.assoc) {
+               struct sk_buff *skb;
+
+               skb = ieee80211_nullfunc_get(hw, vif, link_conf->link_id, true);
+               if (skb) {
+                       local_bh_disable();
+                       mac80211_hwsim_tx_frame(hw, skb, ctx->def.chan);
+                       local_bh_enable();
+               }
+       }
+
        return 0;
 }
 
@@ -2960,6 +2972,22 @@ static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
 {
        hwsim_check_magic(vif);
        hwsim_check_chanctx_magic(ctx);
+
+       /* if we deactivate a link while associated suspend it first */
+       if (vif->type == NL80211_IFTYPE_STATION && vif->cfg.assoc) {
+               struct sk_buff *skb;
+
+               skb = ieee80211_nullfunc_get(hw, vif, link_conf->link_id, true);
+               if (skb) {
+                       struct ieee80211_hdr *hdr = (void *)skb->data;
+
+                       hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+                       local_bh_disable();
+                       mac80211_hwsim_tx_frame(hw, skb, ctx->def.chan);
+                       local_bh_enable();
+               }
+       }
 }
 
 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {