diff options
| author | Chun-Yeow Yeoh <yeohchunyeow@gmail.com> | 2017-11-14 23:20:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-03 17:05:37 +0100 |
| commit | 030d4676a2681a0656c205a9e58b9624a74a16f4 (patch) | |
| tree | 90a7430b6ddda5b2e8b0b887cb39a7da10efd3c5 /net | |
| parent | 03899a46c223510160632e991bad3ad234da386d (diff) | |
mac80211: fix the update of path metric for RANN frame
[ Upstream commit fbbdad5edf0bb59786a51b94a9d006bc8c2da9a2 ]
The previous path metric update from RANN frame has not considered
the own link metric toward the transmitting mesh STA. Fix this.
Reported-by: Michael65535
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/mesh_hwmp.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index b747c9645e43..fed598a202c8 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -788,7 +788,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, struct mesh_path *mpath; u8 ttl, flags, hopcount; const u8 *orig_addr; - u32 orig_sn, metric, metric_txsta, interval; + u32 orig_sn, new_metric, orig_metric, last_hop_metric, interval; bool root_is_gate; ttl = rann->rann_ttl; @@ -799,7 +799,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, interval = le32_to_cpu(rann->rann_interval); hopcount = rann->rann_hopcount; hopcount++; - metric = le32_to_cpu(rann->rann_metric); + orig_metric = le32_to_cpu(rann->rann_metric); /* Ignore our own RANNs */ if (ether_addr_equal(orig_addr, sdata->vif.addr)) @@ -816,7 +816,10 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, return; } - metric_txsta = airtime_link_metric_get(local, sta); + last_hop_metric = airtime_link_metric_get(local, sta); + new_metric = orig_metric + last_hop_metric; + if (new_metric < orig_metric) + new_metric = MAX_METRIC; mpath = mesh_path_lookup(sdata, orig_addr); if (!mpath) { @@ -829,7 +832,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, } if (!(SN_LT(mpath->sn, orig_sn)) && - !(mpath->sn == orig_sn && metric < mpath->rann_metric)) { + !(mpath->sn == orig_sn && new_metric < mpath->rann_metric)) { rcu_read_unlock(); return; } @@ -847,7 +850,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, } mpath->sn = orig_sn; - mpath->rann_metric = metric + metric_txsta; + mpath->rann_metric = new_metric; mpath->is_root = true; /* Recording RANNs sender address to send individually * addressed PREQs destined for root mesh STA */ @@ -867,7 +870,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr, orig_sn, 0, NULL, 0, broadcast_addr, hopcount, ttl, interval, - metric + metric_txsta, 0, sdata); + new_metric, 0, sdata); } rcu_read_unlock(); |