From: Kalle Valo <kalle.valo@xxxxxxxxx>
Certain type of hardware, for example wl1251 and wl1271, need a template
for the Probe Request. Create a function ieee80211_probereq_get() which
creates the template and drivers send it to hardware.
Signed-off-by: Kalle Valo <kalle.valo@xxxxxxxxx>
---
include/net/mac80211.h | 17 ++++++++++++++++
net/mac80211/tx.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index eda45c3..6b4cd98 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1904,6 +1904,23 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
/**
+ * ieee80211_probereq_get - retrieve a Probe Request template
+ * @hw: pointer obtained from ieee80211_alloc_hw().
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ * @ssid: SSID buffer
+ * @ssid_len: length of SSID
+ * @ie: buffer containing all IEs except SSID for the template
+ * @ie_len: length of the IE buffer
+ *
+ * Creates a Probe Request template which can, for example, be uploaded to
+ * hardware.
+ */
+struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ const u8 *ssid, size_t ssid_len,
+ const u8 *ie, size_t ie_len);
+
+/**
* ieee80211_rts_get - RTS frame generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
* @vif: &struct ieee80211_vif pointer from the add_interface callback.
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index bb8819d..361dbf6 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2268,6 +2268,56 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
}
EXPORT_SYMBOL(ieee80211_nullfunc_get);
+struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ const u8 *ssid, size_t ssid_len,
+ const u8 *ie, size_t ie_len)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_local *local;
+ struct ieee80211_hdr_3addr *hdr;
+ struct sk_buff *skb;
+ size_t ie_ssid_len;
+ u8 *pos;
+
+ sdata = vif_to_sdata(vif);
+ local = sdata->local;
+ ie_ssid_len = 2 + ssid_len;
+
+ skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
+ ie_ssid_len + ie_len);
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
+ "request template\n", sdata->name);
+ return NULL;
+ }
+
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+
+ hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
+ memset(hdr, 0, sizeof(*hdr));
+ hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+ IEEE80211_STYPE_PROBE_REQ);
+ memset(hdr->addr1, 0xff, ETH_ALEN);
+ memcpy(hdr->addr2, vif->addr, ETH_ALEN);
+ memset(hdr->addr3, 0xff, ETH_ALEN);
+
+ pos = skb_put(skb, ie_ssid_len);
+ *pos++ = WLAN_EID_SSID;
+ *pos++ = ssid_len;
+ if (ssid)
+ memcpy(pos, ssid, ssid_len);
+ pos += ssid_len;
+
+ if (ie) {
+ pos = skb_put(skb, ie_len);
+ memcpy(pos, ie, ie_len);
+ }
+
+ return skb;
+}
+EXPORT_SYMBOL(ieee80211_probereq_get);
+
void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
const void *frame, size_t frame_len,
const struct ieee80211_tx_info *frame_txctl,
--
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