cfg80211: assimilate and export ieee80211_bss_get_ie

This function from mac80211 seems generally useful, and
I will need it in cfg80211 soon.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index fe87819..eb02654 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -605,6 +605,15 @@ struct cfg80211_bss {
 };
 
 /**
+ * ieee80211_bss_get_ie - find IE with given ID
+ * @bss: the bss to search
+ * @ie: the IE ID
+ * Returns %NULL if not found.
+ */
+const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie);
+
+
+/**
  * struct cfg80211_crypto_settings - Crypto settings
  * @wpa_versions: indicates which, if any, WPA versions are enabled
  *     (from enum nl80211_wpa_versions)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 2d9b666..5748cda 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -46,26 +46,6 @@ static int ecw2cw(int ecw)
        return (1 << ecw) - 1;
 }
 
-static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
-{
-       u8 *end, *pos;
-
-       pos = bss->cbss.information_elements;
-       if (pos == NULL)
-               return NULL;
-       end = pos + bss->cbss.len_information_elements;
-
-       while (pos + 1 < end) {
-               if (pos + 2 + pos[1] > end)
-                       break;
-               if (pos[0] == ie)
-                       return pos;
-               pos += 2 + pos[1];
-       }
-
-       return NULL;
-}
-
 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
                                      struct ieee80211_supported_band *sband,
                                      u32 *rates)
@@ -181,7 +161,8 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
        struct ieee80211_local *local = sdata->local;
        struct sk_buff *skb;
        struct ieee80211_mgmt *mgmt;
-       u8 *pos, *ies, *ht_ie;
+       u8 *pos;
+       const u8 *ies, *ht_ie;
        int i, len, count, rates_len, supp_rates_len;
        u16 capab;
        struct ieee80211_bss *bss;
@@ -345,7 +326,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
         */
        if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
            sband->ht_cap.ht_supported &&
-           (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
+           (ht_ie = ieee80211_bss_get_ie(&bss->cbss, WLAN_EID_HT_INFORMATION)) &&
            ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
            (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
                struct ieee80211_ht_info *ht_info =

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 2555069..28f8f96 100644 (file)
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -502,3 +502,24 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb)
        return dscp >> 5;
 }
 EXPORT_SYMBOL(cfg80211_classify8021d);
+
+const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
+{
+       u8 *end, *pos;
+
+       pos = bss->information_elements;
+       if (pos == NULL)
+               return NULL;
+       end = pos + bss->len_information_elements;
+
+       while (pos + 1 < end) {
+               if (pos + 2 + pos[1] > end)
+                       break;
+               if (pos[0] == ie)
+                       return pos;
+               pos += 2 + pos[1];
+       }
+
+       return NULL;
+}
+EXPORT_SYMBOL(ieee80211_bss_get_ie);