Extract the BSS primary channel from the S1G Operation
element.
Signed-off-by: Thomas Pedersen <thomas@xxxxxxxxxxxx>
---
v4:
- add protection against strange IEs in S1G (Johannes)
---
net/wireless/scan.c | 28 ++++++++++++++++++++++------
1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index b4c85e8f2107..38dabe33a4c5 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1315,18 +1315,34 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
int channel_number = -1;
struct ieee80211_channel *alt_channel;
+
+ if (channel->band == NL80211_BAND_S1GHZ) {
+ tmp = cfg80211_find_ie(WLAN_EID_S1G_OPERATION, ie, ielen);
+ if (tmp && tmp[1] >= sizeof(struct ieee80211_s1g_oper_ie)) {
+ struct ieee80211_s1g_oper_ie *s1gop = (void *)(tmp + 2);
+
+ channel_number = s1gop->primary_ch;
+ }
+
+ /* even if we didn't try to use the one frame came in on */
+ goto found_channel;
+ }
+
tmp = cfg80211_find_ie(WLAN_EID_DS_PARAMS, ie, ielen);
if (tmp && tmp[1] == 1) {
channel_number = tmp[2];
- } else {
- tmp = cfg80211_find_ie(WLAN_EID_HT_OPERATION, ie, ielen);
- if (tmp && tmp[1] >= sizeof(struct ieee80211_ht_operation)) {
- struct ieee80211_ht_operation *htop = (void *)(tmp + 2);
+ goto found_channel;
+ }
- channel_number = htop->primary_chan;
- }
+ tmp = cfg80211_find_ie(WLAN_EID_HT_OPERATION, ie, ielen);
+ if (tmp && tmp[1] >= sizeof(struct ieee80211_ht_operation)) {
+ struct ieee80211_ht_operation *htop = (void *)(tmp + 2);
+
+ channel_number = htop->primary_chan;
+ goto found_channel;
}
+found_channel:
if (channel_number < 0) {
/* No channel information in frame payload */
return channel;
--
2.20.1
