xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: clean up mesh local link ID generation

Browse Source 
802.11-2012 13.3.1 implicitly limits the mesh local link
ID range to that of AID, since for mesh PS the local link
ID must be indicated in the TIM IE, which only holds
IEEE80211_MAX_AID bits.

Also the code was allowing a local link ID of 0, but this
is not correct since that TIM bit is used for indicating
buffered mcast frames.

Generate a random, unique, link ID from 1 - 2007, and drop
a modulo conversion for the local link ID, but keep it for
the peer link ID in case he chose something > MAX_AID.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Pedersen
2013-11-05 11:17:05 -08:00
committed by Johannes Berg
parent c99a89edb1
commit 204d130426
3 changed files with 38 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
net/mac80211/mesh_ps.c
View File

@@ -576,10 +576,9 @@ void ieee80211_mps_frame_release(struct sta_info *sta,
int ac, buffer_local = 0;
bool has_buffered = false;
/* TIM map only for LLID <= IEEE80211_MAX_AID */
if (sta->plink_state == NL80211_PLINK_ESTAB)
has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len,
le16_to_cpu(sta->llid) % IEEE80211_MAX_AID);
le16_to_cpu(sta->llid));
if (has_buffered)
mps_dbg(sta->sdata, "%pM indicates buffered frames\n",