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Commit 7c10ec1d authored by Yuan-Chi Pang's avatar Yuan-Chi Pang Committed by Greg Kroah-Hartman
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mac80211: mesh: fix HWMP sequence numbering to follow standard 



[ Upstream commit 1f631c3201fe5491808df143d8fcba81b3197ffd ]

IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says:
If it is a target mesh STA, it shall update its own HWMP SN to
maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1
immediately before it generates a PREP element in response to a
PREQ element.

Signed-off-by: default avatarYuan-Chi Pang <fu3mo6goo@gmail.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0cf96307

net/mac80211/mesh_hwmp.c

+4 −0
Original line number Diff line number Diff line
@@ -563,6 +563,10 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, 
		forward = false;

		reply = true;

		target_metric = 0;



		if (SN_GT(target_sn, ifmsh->sn))

			ifmsh->sn = target_sn;



		if (time_after(jiffies, ifmsh->last_sn_update +

					net_traversal_jiffies(sdata)) ||

		    time_before(jiffies, ifmsh->last_sn_update)) {