mwifiex: support for parsing TDLS discovery frames

This patch adds support for parsing TDLS discovery
frames. After parsing, we update peer RSSI information.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c
index ec79c49de097..a113ef8f0b8b 100644
--- a/drivers/net/wireless/mwifiex/util.c
+++ b/drivers/net/wireless/mwifiex/util.c
@@ -141,6 +141,38 @@ int mwifiex_get_debug_info(struct mwifiex_private *priv,
         return 0;
 }
 
+static int
+mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
+                          struct rxpd *rx_pd)
+{
+        u16 stype;
+        u8 category, action_code;
+        struct ieee80211_hdr *ieee_hdr = (void *)payload;
+
+        stype =  (cpu_to_le16(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
+
+        switch (stype) {
+        case IEEE80211_STYPE_ACTION:
+                category = *(payload + sizeof(struct ieee80211_hdr));
+                action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
+                if (category == WLAN_CATEGORY_PUBLIC &&
+                    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
+                        dev_dbg(priv->adapter->dev,
+                                "TDLS discovery response %pM nf=%d, snr=%d\n",
+                                ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
+                        mwifiex_auto_tdls_update_peer_signal(priv,
+                                                             ieee_hdr->addr2,
+                                                             rx_pd->snr,
+                                                             rx_pd->nf);
+                }
+                break;
+        default:
+                dev_dbg(priv->adapter->dev,
+                        "unknown mgmt frame subytpe %#x\n", stype);
+        }
+
+        return 0;
+}
 /*
  * This function processes the received management packet and send it
  * to the kernel.
@@ -151,6 +183,7 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 {
         struct rxpd *rx_pd;
         u16 pkt_len;
+        struct ieee80211_hdr *ieee_hdr;
 
         if (!skb)
                 return -1;
@@ -162,6 +195,11 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 
         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 
+        ieee_hdr = (void *)skb->data;
+        if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
+                mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
+                                          pkt_len, rx_pd);
+        }
         /* Remove address4 */
         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
                 skb->data + sizeof(struct ieee80211_hdr),