mac80211: consolidate TDLS IE treatment

Add all information elements for TDLS discovery and setup in the same
function.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Liad Kaufman <liad.kaufman@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 41 insertions, 28 deletions

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 53c235de5d1c..b61448acc438 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -78,13 +78,49 @@ static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
         memcpy(lnkid->resp_sta, peer, ETH_ALEN);
 }
 
+static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
+                                   struct sk_buff *skb, const u8 *peer,
+                                   u8 action_code, bool initiator,
+                                   const u8 *extra_ies, size_t extra_ies_len)
+{
+        const u8 *init_addr, *rsp_addr;
+        enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+
+        switch (action_code) {
+        case WLAN_TDLS_SETUP_REQUEST:
+        case WLAN_TDLS_SETUP_RESPONSE:
+        case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
+                ieee80211_add_srates_ie(sdata, skb, false, band);
+                ieee80211_add_ext_srates_ie(sdata, skb, false, band);
+                ieee80211_tdls_add_ext_capab(skb);
+                break;
+        case WLAN_TDLS_SETUP_CONFIRM:
+        case WLAN_TDLS_TEARDOWN:
+        case WLAN_TDLS_DISCOVERY_REQUEST:
+                break;
+        }
+
+        if (initiator) {
+                init_addr = sdata->vif.addr;
+                rsp_addr = peer;
+        } else {
+                init_addr = peer;
+                rsp_addr = sdata->vif.addr;
+        }
+
+        if (extra_ies_len)
+                memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
+
+        ieee80211_tdls_add_link_ie(skb, init_addr, rsp_addr,
+                                   sdata->u.mgd.bssid);
+}
+
 static int
 ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
                                const u8 *peer, u8 action_code, u8 dialog_token,
                                u16 status_code, struct sk_buff *skb)
 {
         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-        enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
         struct ieee80211_tdls_data *tf;
 
         tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
@@ -103,10 +139,6 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
                 tf->u.setup_req.dialog_token = dialog_token;
                 tf->u.setup_req.capability =
                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
-
-                ieee80211_add_srates_ie(sdata, skb, false, band);
-                ieee80211_add_ext_srates_ie(sdata, skb, false, band);
-                ieee80211_tdls_add_ext_capab(skb);
                 break;
         case WLAN_TDLS_SETUP_RESPONSE:
                 tf->category = WLAN_CATEGORY_TDLS;
@@ -117,10 +149,6 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
                 tf->u.setup_resp.dialog_token = dialog_token;
                 tf->u.setup_resp.capability =
                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
-
-                ieee80211_add_srates_ie(sdata, skb, false, band);
-                ieee80211_add_ext_srates_ie(sdata, skb, false, band);
-                ieee80211_tdls_add_ext_capab(skb);
                 break;
         case WLAN_TDLS_SETUP_CONFIRM:
                 tf->category = WLAN_CATEGORY_TDLS;
@@ -157,7 +185,6 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
                            u16 status_code, struct sk_buff *skb)
 {
         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-        enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
         struct ieee80211_mgmt *mgmt;
 
         mgmt = (void *)skb_put(skb, 24);
@@ -179,10 +206,6 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
                         dialog_token;
                 mgmt->u.action.u.tdls_discover_resp.capability =
                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
-
-                ieee80211_add_srates_ie(sdata, skb, false, band);
-                ieee80211_add_ext_srates_ie(sdata, skb, false, band);
-                ieee80211_tdls_add_ext_capab(skb);
                 break;
         default:
                 return -EINVAL;
@@ -202,7 +225,6 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
         struct ieee80211_local *local = sdata->local;
         struct sk_buff *skb = NULL;
         bool send_direct;
-        const u8 *init_addr, *rsp_addr;
         struct sta_info *sta;
         int ret;
 
@@ -243,9 +265,6 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
         if (ret < 0)
                 goto fail;
 
-        if (extra_ies_len)
-                memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
-
         rcu_read_lock();
         sta = sta_info_get(sdata, peer);
 
@@ -279,21 +298,15 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
                 break;
         }
 
-        if (initiator || (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))) {
-                init_addr = sdata->vif.addr;
-                rsp_addr = peer;
-        } else {
-                init_addr = peer;
-                rsp_addr = sdata->vif.addr;
-        }
+        if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
+                initiator = true;
 
         rcu_read_unlock();
         if (ret < 0)
                 goto fail;
 
-        ieee80211_tdls_add_link_ie(skb, init_addr, rsp_addr,
-                                   sdata->u.mgd.bssid);
-
+        ieee80211_tdls_add_ies(sdata, skb, peer, action_code, initiator,
+                               extra_ies, extra_ies_len);
         if (send_direct) {
                 ieee80211_tx_skb(sdata, skb);
                 return 0;