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authorRafał Miłecki <zajec5@gmail.com>2016-04-25 15:10:47 (GMT)
committerJouni Malinen <j@w1.fi>2016-04-28 17:47:12 (GMT)
commitf4830bed661f4adff51f50a0d37c64ceb748e780 (patch)
tree1cd8461c5e961a42283866820c83a533d8c03667
parentdf5bde83daaf3c820b6ac1f8d383b16a64ebd2db (diff)
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nl80211: Try running without mgmt frame subscription (driver AP SME)
One of supported code paths already allows this scenario. It is used if driver doesn't report NL80211_ATTR_DEVICE_AP_SME and doesn't support monitor interface. In such situation: 1) We don't quit if subscribing for WLAN_FC_STYPE_PROBE_REQ fails 2) We don't try subscribing for WLAN_FC_STYPE_ACTION 3) We fallback to AP SME mode after failing to create monitor interface 4) We don't quit if subscribing for WLAN_FC_STYPE_PROBE_REQ fails Above scenario is used, e.g., with brcmfmac. As you can see - thanks to events provided by cfg80211 - it's not really required to receive Probe Request or action frames. However, the previous implementation did not allow using hostapd with drivers that: 1) Report NL80211_ATTR_DEVICE_AP_SME 2) Don't support subscribing for PROBE_REQ and/or ACTION frames In case of using such a driver hostapd will cancel setup after failing to subscribe for WLAN_FC_STYPE_ACTION. I noticed it after setting flag WIPHY_FLAG_HAVE_AP_SME in brcmfmac driver for my experiments. This patch allows working with such drivers with just a small warning printed as debug message. Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
-rw-r--r--src/drivers/driver_nl80211.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index 7e8d579..db7dafe 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -4302,7 +4302,8 @@ static int nl80211_setup_ap(struct i802_bss *bss)
if (drv->device_ap_sme && !drv->use_monitor)
if (nl80211_mgmt_subscribe_ap_dev_sme(bss))
- return -1;
+ wpa_printf(MSG_DEBUG,
+ "nl80211: Failed to subscribe for mgmt frames from SME driver - trying to run without it");
if (!drv->device_ap_sme && drv->use_monitor &&
nl80211_create_monitor_interface(drv) &&