nl80211: Propagate Probe Response offload capabilities from kernel

Translate nl80211 flags to wpa_supplicant flags for Probe Response
offload support. The existence of the nl80211 PROBE_RESP_OFFLOAD_SUPPORT
attribute means Probe Response offload is supported. The value of the
attribute is a bitmap of supported protocols.

Signed-hostap: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>

diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index c8a71fd..b07b3a3 100644 (file)
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -759,6 +759,8 @@ struct wpa_driver_capa {
 #define WPA_DRIVER_FLAGS_TDLS_SUPPORT                  0x00080000
 /* Driver requires external TDLS setup/teardown/discovery */
 #define WPA_DRIVER_FLAGS_TDLS_EXTERNAL_SETUP           0x00100000
+/* Driver indicates support for Probe Response offloading in AP mode */
+#define WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD            0x00200000
        unsigned int flags;
 
        int max_scan_ssids;
@@ -776,6 +778,20 @@ struct wpa_driver_capa {
         * supports in AP mode
         */
        unsigned int max_stations;
+
+       /**
+        * probe_resp_offloads - Bitmap of supported protocols by the driver
+        * for Probe Response offloading.
+        */
+/* Driver Probe Response offloading support for WPS ver. 1 */
+#define WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS              0x00000001
+/* Driver Probe Response offloading support for WPS ver. 2 */
+#define WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2             0x00000002
+/* Driver Probe Response offloading support for P2P */
+#define WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P              0x00000004
+/* Driver Probe Response offloading support for IEEE 802.11u (Interworking) */
+#define WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING     0x00000008
+       unsigned int probe_resp_offloads;
 };
 
 

diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index d5d7c1f..50c4fa5 100644 (file)
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -2268,6 +2268,23 @@ struct wiphy_info_data {
 };
 
 
+static unsigned int probe_resp_offload_support(int supp_protocols)
+{
+       unsigned int prot = 0;
+
+       if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS)
+               prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS;
+       if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2)
+               prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2;
+       if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P)
+               prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P;
+       if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U)
+               prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING;
+
+       return prot;
+}
+
+
 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 {
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
@@ -2459,6 +2476,16 @@ broken_combination:
                        info->data_tx_status = 1;
        }
 
+       if (tb[NL80211_ATTR_PROBE_RESP_OFFLOAD]) {
+               int protocols =
+                       nla_get_u32(tb[NL80211_ATTR_PROBE_RESP_OFFLOAD]);
+               wpa_printf(MSG_DEBUG, "nl80211: Supports Probe Response "
+                          "offload in AP mode");
+               capa->flags |= WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD;
+               capa->probe_resp_offloads =
+                       probe_resp_offload_support(protocols);
+       }
+
        return NL_SKIP;
 }