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Diffstat (limited to 'net/mac80211/mlme.c')
-rw-r--r--net/mac80211/mlme.c64
1 files changed, 50 insertions, 14 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 55b85ae5bc1..5d7719f44be 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -651,6 +651,26 @@ static void ieee80211_authenticate(struct net_device *dev,
mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
}
+static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
+ struct ieee80211_supported_band *sband,
+ u64 *rates)
+{
+ int i, j, count;
+ *rates = 0;
+ count = 0;
+ for (i = 0; i < bss->supp_rates_len; i++) {
+ int rate = (bss->supp_rates[i] & 0x7F) * 5;
+
+ for (j = 0; j < sband->n_bitrates; j++)
+ if (sband->bitrates[j].bitrate == rate) {
+ *rates |= BIT(j);
+ count++;
+ break;
+ }
+ }
+
+ return count;
+}
static void ieee80211_send_assoc(struct net_device *dev,
struct ieee80211_if_sta *ifsta)
@@ -659,11 +679,12 @@ static void ieee80211_send_assoc(struct net_device *dev,
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
u8 *pos, *ies;
- int i, len;
+ int i, len, count, rates_len, supp_rates_len;
u16 capab;
struct ieee80211_sta_bss *bss;
int wmm = 0;
struct ieee80211_supported_band *sband;
+ u64 rates = 0;
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
@@ -725,24 +746,39 @@ static void ieee80211_send_assoc(struct net_device *dev,
*pos++ = ifsta->ssid_len;
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
+ /* all supported rates should be added here but some APs
+ * (e.g. D-Link DAP 1353 in b-only mode) don't like that
+ * Therefore only add rates the AP supports */
+ rates_len = ieee80211_compatible_rates(bss, sband, &rates);
+ supp_rates_len = rates_len;
+ if (supp_rates_len > 8)
+ supp_rates_len = 8;
+
len = sband->n_bitrates;
- if (len > 8)
- len = 8;
- pos = skb_put(skb, len + 2);
+ pos = skb_put(skb, supp_rates_len + 2);
*pos++ = WLAN_EID_SUPP_RATES;
- *pos++ = len;
- for (i = 0; i < len; i++) {
- int rate = sband->bitrates[i].bitrate;
- *pos++ = (u8) (rate / 5);
- }
+ *pos++ = supp_rates_len;
- if (sband->n_bitrates > len) {
- pos = skb_put(skb, sband->n_bitrates - len + 2);
- *pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos++ = sband->n_bitrates - len;
- for (i = len; i < sband->n_bitrates; i++) {
+ count = 0;
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if (BIT(i) & rates) {
int rate = sband->bitrates[i].bitrate;
*pos++ = (u8) (rate / 5);
+ if (++count == 8)
+ break;
+ }
+ }
+
+ if (count == 8) {
+ pos = skb_put(skb, rates_len - count + 2);
+ *pos++ = WLAN_EID_EXT_SUPP_RATES;
+ *pos++ = rates_len - count;
+
+ for (i++; i < sband->n_bitrates; i++) {
+ if (BIT(i) & rates) {
+ int rate = sband->bitrates[i].bitrate;
+ *pos++ = (u8) (rate / 5);
+ }
}
}