X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=include%2Flinux%2Fieee80211.h;h=1324492cb5dab16fa6baf5227e9b240e8a5d2480;hb=ddeb4ac539b49611e65b3eb98dbe15ac04db0a4f;hp=d0656646697346b5f8b7b3db2909c5741d6db9b7;hpb=decfaafb9a9a13b528782ad601e5d6ab6c913e6a;p=carl9170fw.git

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index d065664..1324492 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -4563,6 +4563,41 @@ static inline u8 ieee80211_mle_common_size(const u8 *data)
 	return sizeof(*mle) + common + mle->variable[0];
 }
 
+/**
+ * ieee80211_mle_get_eml_cap - returns the EML capability
+ * @data: pointer to the multi link EHT IE
+ *
+ * The element is assumed to be big enough. This must be checked by
+ * ieee80211_mle_size_ok().
+ * If the EML capability can't be found (the type is not basic, or
+ * the EML capability presence bit is clear), 0 will be returned.
+ */
+static inline u16 ieee80211_mle_get_eml_cap(const u8 *data)
+{
+	const struct ieee80211_multi_link_elem *mle = (const void *)data;
+	u16 control = le16_to_cpu(mle->control);
+	const u8 *common = mle->variable;
+
+	if (u16_get_bits(control, IEEE80211_ML_CONTROL_TYPE) !=
+	    IEEE80211_ML_CONTROL_TYPE_BASIC)
+		return 0;
+
+	/* common points now at the beginning of ieee80211_mle_basic_common_info */
+	common += sizeof(struct ieee80211_mle_basic_common_info);
+
+	if (!(control & IEEE80211_MLC_BASIC_PRES_EML_CAPA))
+		return 0;
+
+	if (control & IEEE80211_MLC_BASIC_PRES_LINK_ID)
+		common += 1;
+	if (control & IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT)
+		common += 1;
+	if (control & IEEE80211_MLC_BASIC_PRES_MED_SYNC_DELAY)
+		common += 2;
+
+	return get_unaligned_le16(common);
+}
+
 /**
  * ieee80211_mle_size_ok - validate multi-link element size
  * @data: pointer to the element data