From: Soumik Das <soumik.das@xxxxxxxxxxxxxx>
Add routine for retrieving qos null template frame.
Driver may need that for uploading it in the device.
Signed-off-by: Soumik Das <soumik.das@xxxxxxxxxxxxxx>
Signed-off-by: Prakhar Vig <prakhar.vig@xxxxxxxxxxxxxx>
---
include/net/mac80211.h | 16 ++++++++++++++++
net/mac80211/tx.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 1937c7d..10a0529 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2876,6 +2876,22 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
/**
+ * ieee80211_qosnullfunc_get - retrieve a qos nullfunc template
+ * @hw: pointer obtained from ieee80211_alloc_hw().
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * Creates a QOS Nullfunc template which can, for example, be uploaded to
+ * hardware. The template must be updated after association so that correct
+ * BSSID and address is used.
+ *
+ * Note: Caller (or hardware) is responsible for setting the
+ * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields.
+ * The qos ctl field is set to zero by the function. Caller must
+ * fill up proper value.
+ */
+struct sk_buff *ieee80211_qosnullfunc_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.
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index d67d36f..5e4b857 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2595,6 +2595,44 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
}
EXPORT_SYMBOL(ieee80211_nullfunc_get);
+struct sk_buff *ieee80211_qosnullfunc_get(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ieee80211_qos_hdr *nullfunc;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_managed *ifmgd;
+ struct ieee80211_local *local;
+ struct sk_buff *skb;
+
+ if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+ return NULL;
+
+ sdata = vif_to_sdata(vif);
+ ifmgd = &sdata->u.mgd;
+ local = sdata->local;
+
+ skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer for qos "
+ "nullfunc template\n", sdata->name);
+ return NULL;
+ }
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+
+ nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
+ sizeof(*nullfunc));
+ memset(nullfunc, 0, sizeof(*nullfunc));
+ nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
+ IEEE80211_STYPE_QOS_NULLFUNC |
+ IEEE80211_FCTL_TODS);
+ memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
+ memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
+ memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
+
+ return skb;
+}
+EXPORT_SYMBOL(ieee80211_qosnullfunc_get);
+
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const u8 *ssid, size_t ssid_len,
--
1.7.0.4
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