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mac80211: fix A-MSDU outer SA/DA

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According to IEEE 802.11-2012 section 8.3.2 table 8-19, the outer SA/DA
of A-MSDU frames need to be changed depending on FromDS/ToDS values.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
[use ether_addr_copy and add alignment annotations]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michael Braun
2016-10-15 13:28:19 +02:00
committed by Johannes Berg
parent 06f2bb1e01
commit a3e2f4b6ed
3 changed files with 25 additions and 2 deletions
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23
net/mac80211/tx.c
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@@ -3064,6 +3064,7 @@ static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
int subframe_len = skb->len - hdr_len;
void *data;
u8 *qc, *h_80211_src, *h_80211_dst;
const u8 *bssid;
if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
return false;
@@ -3087,6 +3088,28 @@ static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
/* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
* fields needs to be changed to BSSID for A-MSDU frames depending
* on FromDS/ToDS values.
*/
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
bssid = sdata->u.mgd.bssid;
break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
bssid = sdata->vif.addr;
break;
default:
bssid = NULL;
}
if (bssid && ieee80211_has_fromds(hdr->frame_control))
ether_addr_copy(h_80211_src, bssid);
if (bssid && ieee80211_has_tods(hdr->frame_control))
ether_addr_copy(h_80211_dst, bssid);
qc = ieee80211_get_qos_ctl(hdr);
*qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;