nl80211: Optional IEs into scan request

This extends the NL80211_CMD_TRIGGER_SCAN command to allow applications
to specify a set of information element(s) to be added into Probe
Request frames with NL80211_ATTR_IE. This provides support for the
MLME-SCAN.request primitive parameter VendorSpecificInfo and can be
used, e.g., to implement WPS scanning.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index dee17e5cbb8..e0431a1d218 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -884,7 +884,8 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
 }
 
 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
-                              u8 *ssid, size_t ssid_len)
+                              u8 *ssid, size_t ssid_len,
+                              u8 *ie, size_t ie_len)
 {
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_supported_band *sband;
@@ -903,7 +904,7 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
         }
 
         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
-                            extra_preq_ie_len);
+                            ie_len + extra_preq_ie_len);
         if (!skb) {
                 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
                        "request\n", sdata->dev->name);
@@ -950,6 +951,8 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
                 *pos = rate->bitrate / 5;
         }
 
+        if (ie)
+                memcpy(skb_put(skb, ie_len), ie, ie_len);
         if (extra_preq_ie)
                 memcpy(skb_put(skb, extra_preq_ie_len), extra_preq_ie,
                        extra_preq_ie_len);