mac80211: order IEs in probe request correctly
In probe request frames, the VHT IEs should come before any
vendor IEs, but after interworking and similar, so add code
to order them correctly wrt. the IEs passed from userspace.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 503bbce..caa0cd4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1281,13 +1281,32 @@
* that calculates local->scan_ies_len.
*/
- /* add any remaining custom IEs */
+ /* insert custom IEs that go before VHT */
if (ie && ie_len) {
- noffset = ie_len;
+ static const u8 before_vht[] = {
+ WLAN_EID_SSID,
+ WLAN_EID_SUPP_RATES,
+ WLAN_EID_REQUEST,
+ WLAN_EID_EXT_SUPP_RATES,
+ WLAN_EID_DS_PARAMS,
+ WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+ WLAN_EID_HT_CAPABILITY,
+ WLAN_EID_BSS_COEX_2040,
+ WLAN_EID_EXT_CAPABILITY,
+ WLAN_EID_SSID_LIST,
+ WLAN_EID_CHANNEL_USAGE,
+ WLAN_EID_INTERWORKING,
+ /* mesh ID can't happen here */
+ /* 60 GHz can't happen here right now */
+ };
+ noffset = ieee80211_ie_split(ie, ie_len,
+ before_vht, ARRAY_SIZE(before_vht),
+ offset);
if (end - pos < noffset - offset)
goto out_err;
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
+ offset = noffset;
}
if (sband->vht_cap.vht_supported) {
@@ -1297,6 +1316,15 @@
sband->vht_cap.cap);
}
+ /* add any remaining custom IEs */
+ if (ie && ie_len) {
+ noffset = ie_len;
+ if (end - pos < noffset - offset)
+ goto out_err;
+ memcpy(pos, ie + offset, noffset - offset);
+ pos += noffset - offset;
+ }
+
return pos - buffer;
out_err:
WARN_ONCE(1, "not enough space for preq IEs\n");