iwlwifi: mvm: add predefined broadcast filter configuration

Configure arp request broadcast filter if this
option is enabled, in order to allow only arp
request broadcasts to pass-in.

(A following patch will make this filter even narrower
by limiting the arp request to our own ip)

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 08b8051e56f8fe84408c7b0c17bc7d65287edd90..6f9640b6877118a54d295edc4d3ce7b2922d1839 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -128,6 +128,28 @@ static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 };
 #endif
 
+#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
+static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
+       {
+               /* arp */
+               .discard = 0,
+               .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
+               .attrs = {
+                       {
+                               /* frame type - arp, hw type - ethernet */
+                               .offset_type =
+                                       BCAST_FILTER_OFFSET_PAYLOAD_START,
+                               .offset = sizeof(rfc1042_header),
+                               .val = cpu_to_be32(0x08060001),
+                               .mask = cpu_to_be32(0xffffffff),
+                       },
+               },
+       },
+       /* last filter must be empty */
+       {},
+};
+#endif
+
 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 {
        int i;
@@ -292,6 +314,11 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
        }
 #endif
 
+#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
+       /* assign default bcast filtering configuration */
+       mvm->bcast_filters = iwl_mvm_default_bcast_filters;
+#endif
+
        ret = iwl_mvm_leds_init(mvm);
        if (ret)
                return ret;