From: Kalle Valo <kalle.valo@nokia.com>
Date: Tue, 5 Jan 2010 18:16:44 +0000 (+0200)
Subject: mac80211: use Probe Request template when sending a direct scan
X-Git-Tag: firefly_0821_release~9833^2~3055^2~49^2~355
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7c12ce8b854df346388ea56d684784e3484012cf;p=firefly-linux-kernel-4.4.55.git

mac80211: use Probe Request template when sending a direct scan

As mac80211 now has a separate function for creating Probe Request templates,
better to use it when sending direct Probe Requests to an AP. Only the
bssid needs to be updated in the template before sending it.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index bc73904d561c..72a98e844718 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1000,37 +1000,29 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 	struct ieee80211_local *local = sdata->local;
 	struct sk_buff *skb;
 	struct ieee80211_mgmt *mgmt;
-	u8 *pos;
-
-	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
-			    ie_len);
-	if (!skb) {
-		printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
-		       "request\n", sdata->name);
+	size_t buf_len;
+	u8 *buf;
+
+	/* FIXME: come up with a proper value */
+	buf = kmalloc(200 + ie_len, GFP_KERNEL);
+	if (!buf) {
+		printk(KERN_DEBUG "%s: failed to allocate temporary IE "
+		       "buffer\n", sdata->name);
 		return;
 	}
-	skb_reserve(skb, local->hw.extra_tx_headroom);
 
-	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
-	memset(mgmt, 0, 24);
-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
-					  IEEE80211_STYPE_PROBE_REQ);
-	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
+					   local->hw.conf.channel->band);
+
+	skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
+				     ssid, ssid_len,
+				     buf, buf_len);
+
 	if (dst) {
+		mgmt = (struct ieee80211_mgmt *) skb->data;
 		memcpy(mgmt->da, dst, ETH_ALEN);
 		memcpy(mgmt->bssid, dst, ETH_ALEN);
-	} else {
-		memset(mgmt->da, 0xff, ETH_ALEN);
-		memset(mgmt->bssid, 0xff, ETH_ALEN);
 	}
-	pos = skb_put(skb, 2 + ssid_len);
-	*pos++ = WLAN_EID_SSID;
-	*pos++ = ssid_len;
-	memcpy(pos, ssid, ssid_len);
-	pos += ssid_len;
-
-	skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len,
-					      local->hw.conf.channel->band));
 
 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 	ieee80211_tx_skb(sdata, skb);