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>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 08b8051e56f8..6f9640b68771 100644
--- 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;