From 1f631c3201fe5491808df143d8fcba81b3197ffd Mon Sep 17 00:00:00 2001
From: Yuan-Chi Pang <fu3mo6goo@gmail.com>
Date: Wed, 29 Aug 2018 09:30:08 +0800
Subject: [PATCH] mac80211: mesh: fix HWMP sequence numbering to follow standard
Git-commit: 1f631c3201fe5491808df143d8fcba81b3197ffd
Patch-mainline: v4.19-rc3
References: bsc#1051510
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: Yuan-Chi Pang <fu3mo6goo@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/mac80211/mesh_hwmp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 35ad3983ae4b..daf9db3c8f24 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -572,6 +572,10 @@ 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)) {
--
2.18.0