diff options
| author | Ashok Nagarajan <ashok@cozybit.com> | 2012-02-28 17:04:08 -0800 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-03-05 15:23:15 -0500 |
| commit | 5533513784a88049e19dd2ab380a452b61e5171e (patch) | |
| tree | 8e48d0cf30f3e94475ee80479308e98908b3c0bc /net/mac80211 | |
| parent | 5809802180b2b638762465cbad3f51a9ac8ff0b3 (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')
| -rw-r--r-- | net/mac80211/cfg.c | 8 | ||||
| -rw-r--r-- | net/mac80211/debugfs_netdev.c | 2 | ||||
| -rw-r--r-- | net/mac80211/mesh_plink.c | 16 |
3 files changed, 25 insertions, 1 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 6a77d4c910f..ab31cc56a2f 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1314,6 +1314,14 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy, } if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask)) conf->dot11MeshForwarding = nconf->dot11MeshForwarding; + if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) { + /* our RSSI threshold implementation is supported only for + * devices that report signal in dBm. + */ + if (!(sdata->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)) + return -ENOTSUPP; + conf->rssi_threshold = nconf->rssi_threshold; + } return 0; } diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index 510ed1dab3c..9f484d8905f 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -443,6 +443,7 @@ IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol, IEEE80211_IF_FILE(dot11MeshHWMPRannInterval, u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC); IEEE80211_IF_FILE(dot11MeshForwarding, u.mesh.mshcfg.dot11MeshForwarding, DEC); +IEEE80211_IF_FILE(rssi_threshold, u.mesh.mshcfg.rssi_threshold, DEC); #endif @@ -581,6 +582,7 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata) MESHPARAMS_ADD(dot11MeshHWMPRootMode); MESHPARAMS_ADD(dot11MeshHWMPRannInterval); MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol); + MESHPARAMS_ADD(rssi_threshold); #undef MESHPARAMS_ADD } #endif 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(); |