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mac80211: oce: enable receiving of bcast probe resp 

One of OCE's optimizations is acception of broadcast probe responses.
Accept broadcast probe responses but don't set
NL80211_EXT_FEATURE_ACCEPT_BCAST_PROBE_RESP. Because a device's firmware
may filter out the broadcast probe resp - drivers should set this flag.

Signed-off-by: Roee Zamir <roee.zamir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
[johannes: make accepting broadcast conditional on the nl80211 scan
 flag that was added for that specific purpose]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Roee Zamir 2017-08-06 11:38:23 +03:00 committed by Johannes Berg
parent 2d23d0736e
commit 40b0bd2497
1 changed files with 28 additions and 9 deletions
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37
net/mac80211/scan.c
View File

@ -7,7 +7,7 @@
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2013-2015 Intel Mobile Communications GmbH
* Copyright 2016 Intel Deutschland GmbH
* Copyright 2016-2017 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -183,6 +183,20 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
return bss;
}
static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata,
u32 scan_flags, const u8 *da)
{
if (!sdata)
return false;
/* accept broadcast for OCE */
if (scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP &&
is_broadcast_ether_addr(da))
return true;
if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
return true;
return ether_addr_equal(da, sdata->vif.addr);
}
void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
{
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
@ -208,19 +222,24 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
if (ieee80211_is_probe_resp(mgmt->frame_control)) {
struct cfg80211_scan_request *scan_req;
struct cfg80211_sched_scan_request *sched_scan_req;
u32 scan_req_flags = 0, sched_scan_req_flags = 0;
scan_req = rcu_dereference(local->scan_req);
sched_scan_req = rcu_dereference(local->sched_scan_req);
/* ignore ProbeResp to foreign address unless scanning
* with randomised address
if (scan_req)
scan_req_flags = scan_req->flags;
if (sched_scan_req)
sched_scan_req_flags = sched_scan_req->flags;
/* ignore ProbeResp to foreign address or non-bcast (OCE)
* unless scanning with randomised address
*/
if (!(sdata1 &&
(ether_addr_equal(mgmt->da, sdata1->vif.addr) ||
scan_req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)) &&
!(sdata2 &&
(ether_addr_equal(mgmt->da, sdata2->vif.addr) ||
sched_scan_req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)))
if (!ieee80211_scan_accept_presp(sdata1, scan_req_flags,
mgmt->da) &&
!ieee80211_scan_accept_presp(sdata2, sched_scan_req_flags,
mgmt->da))
return;
elements = mgmt->u.probe_resp.variable;