package/kernel/mac80211/patches/383-mac80211-mesh-fix-HWMP-sequence-numbering-to-follow-.patch

   1 From: Yuan-Chi Pang <fu3mo6goo@gmail.com>
   2 Date: Wed, 29 Aug 2018 09:30:08 +0800
   3 Subject: [PATCH] mac80211: mesh: fix HWMP sequence numbering to follow
   4  standard
   5
   6 IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says:
   7 If it is a target mesh STA, it shall update its own HWMP SN to
   8 maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1
   9 immediately before it generates a PREP element in response to a
  10 PREQ element.
  11
  12 Signed-off-by: Yuan-Chi Pang <fu3mo6goo@gmail.com>
  13 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  14 ---
  15
  16 --- a/net/mac80211/mesh_hwmp.c
  17 +++ b/net/mac80211/mesh_hwmp.c
  18 @@ -572,6 +572,10 @@ static void hwmp_preq_frame_process(stru
  19                 forward = false;
  20                 reply = true;
  21                 target_metric = 0;
  22 +
  23 +               if (SN_GT(target_sn, ifmsh->sn))
  24 +                       ifmsh->sn = target_sn;
  25 +
  26                 if (time_after(jiffies, ifmsh->last_sn_update +
  27                                         net_traversal_jiffies(sdata)) ||
  28                     time_before(jiffies, ifmsh->last_sn_update)) {