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authorAshok Nagarajan <ashok@cozybit.com>2012-02-28 17:04:08 -0800
committerJohn W. Linville <linville@tuxdriver.com>2012-03-05 15:23:15 -0500
commit5533513784a88049e19dd2ab380a452b61e5171e (patch)
tree8e48d0cf30f3e94475ee80479308e98908b3c0bc /net/mac80211/mesh_plink.c
parent5809802180b2b638762465cbad3f51a9ac8ff0b3 (diff)
{nl,cfg,mac}80211: Implement RSSI threshold for mesh peering
Mesh peer links are established only if average rssi of the peer candidate satisfies the threshold. This is not in 802.11s specification but was requested by David Fulgham, an open80211s user. This is a way to avoid marginal peer links with stations that are barely within range. This patch adds a new mesh configuration parameter, mesh_rssi_threshold. This feature is supported only for hardwares that report signal in dBm. Signed-off-by: Ashok Nagarajan <ashok@cozybit.com> Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/mesh_plink.c')
-rw-r--r--net/mac80211/mesh_plink.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 8806e5ef8ff..80ce5277253 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -31,6 +31,11 @@
#define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout)
#define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks)
+#define sta_meets_rssi_threshold(sta, sdata) \
+ (sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\
+ (s8) -ewma_read(&sta->avg_signal) > \
+ sdata->u.mesh.mshcfg.rssi_threshold)
+
enum plink_event {
PLINK_UNDEFINED,
OPN_ACPT,
@@ -301,7 +306,8 @@ void mesh_neighbour_update(u8 *hw_addr, u32 rates,
if (mesh_peer_accepts_plinks(elems) &&
sta->plink_state == NL80211_PLINK_LISTEN &&
sdata->u.mesh.accepting_plinks &&
- sdata->u.mesh.mshcfg.auto_open_plinks)
+ sdata->u.mesh.mshcfg.auto_open_plinks &&
+ sta_meets_rssi_threshold(sta, sdata))
mesh_plink_open(sta);
rcu_read_unlock();
@@ -531,6 +537,14 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
return;
}
+ if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
+ !sta_meets_rssi_threshold(sta, sdata)) {
+ mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n",
+ sta->sta.addr);
+ rcu_read_unlock();
+ return;
+ }
+
if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
mpl_dbg("Mesh plink: Action frame from non-authed peer\n");
rcu_read_unlock();