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nl80211: Fix monitor interface reference counting

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The first user of monitor interface was not counted and that could
result in the monitor interface getting removed if the initial interface
was removed from a multi-BSS setup.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-10-31 21:55:17 +02:00 committed by Jouni Malinen
parent 08e55ebbb0
commit 748c0ac0e7
1 changed files with 11 additions and 3 deletions
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12
src/drivers/driver_nl80211.c
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@ -7378,7 +7378,10 @@ static int add_monitor_filter(int s)
static void nl80211_remove_monitor_interface(
struct wpa_driver_nl80211_data *drv)
{
if (drv->monitor_refcount > 0)
drv->monitor_refcount--;
wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface: refcount=%d",
drv->monitor_refcount);
if (drv->monitor_refcount > 0)
return;
@ -7404,6 +7407,8 @@ nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
if (drv->monitor_ifidx >= 0) {
drv->monitor_refcount++;
wpa_printf(MSG_DEBUG, "nl80211: Re-use existing monitor interface: refcount=%d",
drv->monitor_refcount);
return 0;
}
@ -7481,6 +7486,7 @@ nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
goto error;
}
drv->monitor_refcount++;
return 0;
error:
nl80211_remove_monitor_interface(drv);
@ -7492,8 +7498,8 @@ static int nl80211_setup_ap(struct i802_bss *bss)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
wpa_printf(MSG_DEBUG, "nl80211: Setup AP - device_ap_sme=%d "
"use_monitor=%d", drv->device_ap_sme, drv->use_monitor);
wpa_printf(MSG_DEBUG, "nl80211: Setup AP(%s) - device_ap_sme=%d use_monitor=%d",
bss->ifname, drv->device_ap_sme, drv->use_monitor);
/*
* Disable Probe Request reporting unless we need it in this way for
@ -7531,6 +7537,8 @@ static void nl80211_teardown_ap(struct i802_bss *bss)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
wpa_printf(MSG_DEBUG, "nl80211: Teardown AP(%s) - device_ap_sme=%d use_monitor=%d",
bss->ifname, drv->device_ap_sme, drv->use_monitor);
if (drv->device_ap_sme) {
wpa_driver_nl80211_probe_req_report(bss, 0);
if (!drv->use_monitor)