openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

mac80211: don't warn on AID field without top two MSBs set 

While the change between 802.11-2012 and 802.11-2016 to move from
requiring APs to set the two top bits to now requiring them to be
cleared was apparently unintentional and will be fixed, clients
should either way assume that the top five bits are reserved and
ignore them.

Implement that in mac80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2017-12-01 13:50:51 +02:00
parent 768075ebc2
commit c7c477b52c
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
net/mac80211/mlme.c
View File

@ -2862,10 +2862,11 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
aid);
aid &= ~(BIT(15) | BIT(14));
/*
* The 5 MSB of the AID field are reserved
* (802.11-2016 9.4.1.8 AID field)
*/
aid &= 0x7ff;
ifmgd->broken_ap = false;