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staging: rtl8723au: validate_recv_data_frame() use fctl knowledge to obtain bssid 

Use the knowledge we already have from parsing the TODS/FROMDS bits in
hdr->frame_control to obtain the bssid.

Note that get_hdr_bssid() would never return NULL as handling 4
combinations of a 2 bit word leaves little space for falling through
to the 'default' value.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
wifi-calibration
Jes Sorensen 2014-05-09 15:03:31 +02:00 committed by Greg Kroah-Hartman
parent 5ca12b7899
commit aa66fbb956
1 changed files with 11 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/staging/rtl8723au/core/rtw_recv.c
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@ -1308,9 +1308,8 @@ static int validate_recv_data_frame(struct rtw_adapter *adapter,
struct recv_frame *precv_frame)
{
u8 bretry;
u8 *psa, *pda, *pbssid;
u8 *psa, *pda;
struct sta_info *psta = NULL;
u8 *ptr = precv_frame->pkt->data;
struct rx_pkt_attrib *pattrib = & precv_frame->attrib;
struct security_priv *psecuritypriv = &adapter->securitypriv;
int ret = _SUCCESS;
@ -1322,39 +1321,39 @@ static int validate_recv_data_frame(struct rtw_adapter *adapter,
bretry = ieee80211_has_retry(hdr->frame_control);
pda = ieee80211_get_DA(hdr);
psa = ieee80211_get_SA(hdr);
pbssid = get_hdr_bssid(ptr);
if (pbssid == NULL) {
ret = _FAIL;
goto exit;
}
ether_addr_copy(pattrib->dst, pda);
ether_addr_copy(pattrib->src, psa);
ether_addr_copy(pattrib->bssid, pbssid);
switch (hdr->frame_control &
cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
case cpu_to_le16(0):
ether_addr_copy(pattrib->bssid, hdr->addr3);
ether_addr_copy(pattrib->ra, pda);
ether_addr_copy(pattrib->ta, psa);
ret = sta2sta_data_frame(adapter, precv_frame, &psta);
break;
case cpu_to_le16(IEEE80211_FCTL_FROMDS):
ether_addr_copy(pattrib->bssid, hdr->addr2);
ether_addr_copy(pattrib->ra, pda);
ether_addr_copy(pattrib->ta, pbssid);
ether_addr_copy(pattrib->ta, hdr->addr2);
ret = ap2sta_data_frame(adapter, precv_frame, &psta);
break;
case cpu_to_le16(IEEE80211_FCTL_TODS):
ether_addr_copy(pattrib->ra, pbssid);
ether_addr_copy(pattrib->bssid, hdr->addr1);
ether_addr_copy(pattrib->ra, hdr->addr1);
ether_addr_copy(pattrib->ta, psa);
ret = sta2ap_data_frame(adapter, precv_frame, &psta);
break;
case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
/*
* There is no BSSID in this case, but the driver has been
* using addr1 so far, so keep it for now.
*/
ether_addr_copy(pattrib->bssid, hdr->addr1);
ether_addr_copy(pattrib->ra, hdr->addr1);
ether_addr_copy(pattrib->ta, hdr->addr2);
ret = _FAIL;