hostapd: add a workaround for driver issues in various android devices with texas instruments wifi

SVN-Revision: 28167

package/hostapd/patches/570-wpa_ie_cap_workaround.patch

@@ -0,0 +1,56 @@
+--- a/src/common/wpa_common.c
++++ b/src/common/wpa_common.c
+@@ -811,6 +811,31 @@ const char * wpa_key_mgmt_txt(int key_mg
+ }
+ 
+ 
++static void wpa_fixup_wpa_ie_rsn(u8 *assoc_ie, const u8 *wpa_msg_ie,
++				 size_t rsn_ie_len)
++{
++	int pos, count;
++
++	pos = sizeof(struct rsn_ie_hdr) + RSN_SELECTOR_LEN;
++	if (rsn_ie_len < pos + 2)
++		return;
++
++	count = WPA_GET_LE16(wpa_msg_ie + pos);
++	pos += 2 + count * RSN_SELECTOR_LEN;
++	if (rsn_ie_len < pos + 2)
++		return;
++
++	count = WPA_GET_LE16(wpa_msg_ie + pos);
++	pos += 2 + count * RSN_SELECTOR_LEN;
++	if (rsn_ie_len < pos + 2)
++		return;
++
++	if (!assoc_ie[pos] && !assoc_ie[pos + 1] &&
++	    (wpa_msg_ie[pos] || wpa_msg_ie[pos + 1]))
++		memcpy(&assoc_ie[pos], &wpa_msg_ie[pos], 2);
++}
++
++
+ int wpa_compare_rsn_ie(int ft_initial_assoc,
+ 		       const u8 *ie1, size_t ie1len,
+ 		       const u8 *ie2, size_t ie2len)
+@@ -818,8 +843,19 @@ int wpa_compare_rsn_ie(int ft_initial_as
+ 	if (ie1 == NULL || ie2 == NULL)
+ 		return -1;
+ 
+-	if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
+-		return 0; /* identical IEs */
++	if (ie1len == ie2len) {
++		u8 *ie_tmp;
++
++		if (os_memcmp(ie1, ie2, ie1len) == 0)
++			return 0; /* identical IEs */
++
++		ie_tmp = alloca(ie1len);
++		memcpy(ie_tmp, ie1, ie1len);
++		wpa_fixup_wpa_ie_rsn(ie_tmp, ie2, ie1len);
++
++		if (os_memcmp(ie_tmp, ie2, ie1len) == 0)
++			return 0; /* only mismatch in RSN capabilties */
++	}
+ 
+ #ifdef CONFIG_IEEE80211R
+ 	if (ft_initial_assoc) {