[RFC 2/4] nl80211: add scheduled scan support
Luciano Coelho
coelho
Wed Sep 21 04:07:21 PDT 2011
This commit adds scheduled scan support in the nl80211 driver.
Signed-off-by: Luciano Coelho <coelho at ti.com>
---
src/drivers/driver_nl80211.c | 142 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 142 insertions(+), 0 deletions(-)
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index 1989325..2e117c9 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -1479,6 +1479,13 @@ static int process_event(struct nl_msg *msg, void *arg)
case NL80211_CMD_TRIGGER_SCAN:
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
break;
+ case NL80211_CMD_START_SCHED_SCAN:
+ wpa_printf(MSG_DEBUG, "nl80211: Sched scan started");
+ break;
+ case NL80211_CMD_SCHED_SCAN_STOPPED:
+ wpa_printf(MSG_DEBUG, "nl80211: Sched scan stopped");
+ wpa_supplicant_event(drv->ctx, EVENT_SCHED_SCAN_STOPPED, NULL);
+ break;
case NL80211_CMD_NEW_SCAN_RESULTS:
wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
drv->scan_complete_events = 1;
@@ -1486,6 +1493,10 @@ static int process_event(struct nl_msg *msg, void *arg)
drv->ctx);
send_scan_event(drv, 0, tb);
break;
+ case NL80211_CMD_SCHED_SCAN_RESULTS:
+ wpa_printf(MSG_DEBUG, "nl80211: New sched scan results available");
+ send_scan_event(drv, 0, tb);
+ break;
case NL80211_CMD_SCAN_ABORTED:
wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
/*
@@ -1634,6 +1645,7 @@ nla_put_failure:
struct wiphy_info_data {
int max_scan_ssids;
+ int max_sched_scan_ssids;
int ap_supported;
int p2p_supported;
int p2p_concurrent;
@@ -1669,6 +1681,10 @@ static int wiphy_info_handler(struct nl_msg *msg, void *arg)
info->max_scan_ssids =
nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
+ if (tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS])
+ info->max_sched_scan_ssids =
+ nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS]);
+
if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
struct nlattr *nl_mode;
int i;
@@ -1820,6 +1836,7 @@ static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
WPA_DRIVER_AUTH_LEAP;
drv->capa.max_scan_ssids = info.max_scan_ssids;
+ drv->capa.max_sched_scan_ssids = info.max_sched_scan_ssids;
if (info.ap_supported)
drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
@@ -2558,6 +2575,129 @@ nla_put_failure:
}
+/**
+ * wpa_driver_nl80211_sched_scan - Initiate a scheduled scan
+ * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
+ * @params: Scan parameters
+ * @interval: interval between scan cycles
+ * Returns: 0 on success, -1 on failure or if not supported
+ */
+static int wpa_driver_nl80211_sched_scan(void *priv,
+ struct wpa_driver_scan_params *params,
+ u32 interval)
+{
+ struct i802_bss *bss = priv;
+ struct wpa_driver_nl80211_data *drv = bss->drv;
+ int ret = 0;
+ struct nl_msg *msg, *ssids, *freqs;
+ size_t i;
+
+ msg = nlmsg_alloc();
+ ssids = nlmsg_alloc();
+ freqs = nlmsg_alloc();
+ if (!msg || !ssids || !freqs) {
+ nlmsg_free(msg);
+ nlmsg_free(ssids);
+ nlmsg_free(freqs);
+ return -1;
+ }
+
+ os_free(drv->filter_ssids);
+ drv->filter_ssids = params->filter_ssids;
+ params->filter_ssids = NULL;
+ drv->num_filter_ssids = params->num_filter_ssids;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
+ NL80211_CMD_START_SCHED_SCAN, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, interval);
+
+ for (i = 0; i < params->num_ssids; i++) {
+ wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan SSID",
+ params->ssids[i].ssid,
+ params->ssids[i].ssid_len);
+ NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
+ params->ssids[i].ssid);
+ }
+ if (params->num_ssids)
+ nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
+
+ if (params->extra_ies) {
+ wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan extra IEs",
+ params->extra_ies, params->extra_ies_len);
+ NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
+ params->extra_ies);
+ }
+
+ if (params->freqs) {
+ for (i = 0; params->freqs[i]; i++) {
+ wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
+ "MHz", params->freqs[i]);
+ NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
+ }
+ nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
+ }
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+
+ /* TODO: if we get an error here, we should fall back to normal scan */
+
+ msg = NULL;
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: sched scan start failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+ goto nla_put_failure;
+ }
+
+ wpa_printf(MSG_DEBUG, "nl80211: Sched scan requested (ret=%d) - scan interval %d "
+ "msec", ret, interval);
+
+nla_put_failure:
+ nlmsg_free(ssids);
+ nlmsg_free(msg);
+ nlmsg_free(freqs);
+ return ret;
+}
+
+/**
+ * wpa_driver_nl80211_stop_sched_scan - Stop a scheduled scan
+ * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
+ * Returns: 0 on success, -1 on failure or if not supported
+ */
+static int wpa_driver_nl80211_stop_sched_scan(void *priv)
+{
+ struct i802_bss *bss = priv;
+ struct wpa_driver_nl80211_data *drv = bss->drv;
+ int ret = 0;
+ struct nl_msg *msg;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
+ NL80211_CMD_STOP_SCHED_SCAN, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ msg = NULL;
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: sched scan stop failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+ goto nla_put_failure;
+ }
+
+ wpa_printf(MSG_DEBUG, "nl80211: Sched scan stop sent (ret=%d)", ret);
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return ret;
+}
+
+
static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
{
const u8 *end, *pos;
@@ -7039,6 +7179,8 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.get_ssid = wpa_driver_nl80211_get_ssid,
.set_key = wpa_driver_nl80211_set_key,
.scan2 = wpa_driver_nl80211_scan,
+ .sched_scan = wpa_driver_nl80211_sched_scan,
+ .stop_sched_scan = wpa_driver_nl80211_stop_sched_scan,
.get_scan_results2 = wpa_driver_nl80211_get_scan_results,
.deauthenticate = wpa_driver_nl80211_deauthenticate,
.disassociate = wpa_driver_nl80211_disassociate,
--
1.7.1
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