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mac80211: mesh_plink: handle confirm frames with new plid 

The 802.11 standard says when processing a plink confirm
frame:

"If the peerLinkID in the mesh peering instance has not been
set, the Local Link ID field of the Mesh Peering Confirm
request shall be copied into the peerLinkID in the mesh
peering instance."

We were only doing this when receiving an open peering frame,
but it could happen that the open frame gets lost and so we
should handle this case rather than rejecting the confirm and
failing the whole peering process.

Reported-by: Yu Niiro <yu.niiro@gmail.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Bob Copeland 2014-06-28 16:35:25 -04:00 committed by Johannes Berg
parent 3918edb0e6
commit 6c6fa49649
1 changed files with 6 additions and 1 deletions
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7
net/mac80211/mesh_plink.c
View File

@ -959,7 +959,8 @@ mesh_plink_get_event(struct ieee80211_sub_if_data *sdata,
if (!matches_local)
event = CNF_RJCT;
if (!mesh_plink_free_count(sdata) ||
(sta->llid != llid || sta->plid != plid))
sta->llid != llid ||
(sta->plid && sta->plid != plid))
event = CNF_IGNR;
else
event = CNF_ACPT;
@ -1080,6 +1081,10 @@ mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata,
goto unlock_rcu;
}
/* 802.11-2012 13.3.7.2 - update plid on CNF if not set */
if (!sta->plid && event == CNF_ACPT)
sta->plid = plid;
changed |= mesh_plink_fsm(sdata, sta, event);
unlock_rcu: