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nl80211: Support in-kernel station poll

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If the kernel supports this, don't use manual null
data frame transmissions. This is one thing to get
rid of cooked monitor interfaces.

Signed-hostap: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2011-11-19 14:23:46 +02:00 committed by Jouni Malinen
parent d12dab4c6f
commit 397188521d
1 changed files with 56 additions and 3 deletions
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59
src/drivers/driver_nl80211.c
View file

@ -205,6 +205,7 @@ struct wpa_driver_nl80211_data {
unsigned int pending_remain_on_chan:1;
unsigned int in_interface_list:1;
unsigned int device_ap_sme:1;
unsigned int poll_command_supported:1;
u64 remain_on_chan_cookie;
u64 send_action_cookie;
@ -1669,6 +1670,22 @@ static void nl80211_pmksa_candidate_event(struct wpa_driver_nl80211_data *drv,
}
static void nl80211_client_probe_event(struct wpa_driver_nl80211_data *drv,
struct nlattr **tb)
{
union wpa_event_data data;
if (!tb[NL80211_ATTR_MAC] || !tb[NL80211_ATTR_ACK])
return;
os_memset(&data, 0, sizeof(data));
os_memcpy(data.client_poll.addr,
nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
wpa_supplicant_event(drv->ctx, EVENT_DRIVER_CLIENT_POLL_OK, &data);
}
static int process_event(struct nl_msg *msg, void *arg)
{
struct wpa_driver_nl80211_data *drv = arg;
@ -1791,6 +1808,9 @@ static int process_event(struct nl_msg *msg, void *arg)
case NL80211_CMD_PMKSA_CANDIDATE:
nl80211_pmksa_candidate_event(drv, tb);
break;
case NL80211_CMD_PROBE_CLIENT:
nl80211_client_probe_event(drv, tb);
break;
default:
wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
"(cmd=%d)", gnlh->cmd);
@ -1859,6 +1879,7 @@ struct wiphy_info_data {
unsigned int error:1;
unsigned int device_ap_sme:1;
unsigned int poll_command_supported:1;
};
@ -1990,6 +2011,9 @@ broken_combination:
case NL80211_CMD_START_SCHED_SCAN:
capa->sched_scan_supported = 1;
break;
case NL80211_CMD_PROBE_CLIENT:
info->poll_command_supported = 1;
break;
}
}
}
@ -2101,6 +2125,7 @@ static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
drv->capa.flags |= WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS;
drv->device_ap_sme = info.device_ap_sme;
drv->poll_command_supported = info.poll_command_supported;
return 0;
}
@ -7458,10 +7483,11 @@ static void nl80211_set_rekey_info(void *priv, const u8 *kek, const u8 *kck,
}
static void nl80211_poll_client(void *priv, const u8 *own_addr, const u8 *addr,
int qos)
static void nl80211_send_null_frame(struct i802_bss *bss, const u8 *own_addr,
const u8 *addr, int qos)
{
struct i802_bss *bss = priv;
/* send data frame to poll STA and check whether
* this frame is ACKed */
struct {
struct ieee80211_hdr hdr;
u16 qos_ctl;
@ -7494,6 +7520,33 @@ static void nl80211_poll_client(void *priv, const u8 *own_addr, const u8 *addr,
"send poll frame");
}
static void nl80211_poll_client(void *priv, const u8 *own_addr, const u8 *addr,
int qos)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
if (!drv->poll_command_supported) {
nl80211_send_null_frame(bss, own_addr, addr, qos);
return;
}
msg = nlmsg_alloc();
if (!msg)
return;
nl80211_cmd(drv, msg, 0, NL80211_CMD_PROBE_CLIENT);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
send_and_recv_msgs(drv, msg, NULL, NULL);
return;
nla_put_failure:
nlmsg_free(msg);
}
#ifdef CONFIG_TDLS