@@ -199,6 +199,11 @@
* @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons,
* partial scan results may be available
*
+ * @NL80211_CMD_START_SCHED_SCAN: start a periodic scan
+ * @NL80211_CMD_STOP_SCHED_SCAN: stop a periodic scan
+ * @NL80211_CMD_SCHED_SCAN_RESULTS: there are periodic scan results
+ * available.
+ *
* @NL80211_CMD_GET_SURVEY: get survey resuls, e.g. channel occupation
* or noise level
* @NL80211_CMD_NEW_SURVEY_RESULTS: survey data notification (as a reply to
@@ -508,6 +513,10 @@ enum nl80211_commands {
NL80211_CMD_JOIN_MESH,
NL80211_CMD_LEAVE_MESH,
+ NL80211_CMD_START_SCHED_SCAN,
+ NL80211_CMD_STOP_SCHED_SCAN,
+ NL80211_CMD_SCHED_SCAN_RESULTS,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -741,6 +741,33 @@ struct cfg80211_scan_request {
};
/**
+ * struct cfg80211_sched_scan_request - periodic scan request description
+ *
+ * @ssids: SSIDs to report (other SSIDs will be filtered out)
+ * @n_ssids: number of SSIDs
+ * @n_channels: total number of channels to scan
+ * @ie: optional information element(s) to add into Probe Request or %NULL
+ * @ie_len: length of ie in octets
+ * @wiphy: the wiphy this was for
+ * @dev: the interface
+ * @channels: channels to scan
+ */
+struct cfg80211_sched_scan_request {
+ struct cfg80211_ssid *ssids;
+ int n_ssids;
+ u32 n_channels;
+ const u8 *ie;
+ size_t ie_len;
+
+ /* internal */
+ struct wiphy *wiphy;
+ struct net_device *dev;
+
+ /* keep last */
+ struct ieee80211_channel *channels[0];
+};
+
+/**
* enum cfg80211_signal_type - signal type
*
* @CFG80211_SIGNAL_TYPE_NONE: no signal strength information available
@@ -1173,6 +1200,8 @@ struct cfg80211_pmksa {
* @set_power_mgmt: Configure WLAN power management. A timeout value of -1
* allows the driver to adjust the dynamic ps timeout value.
* @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold.
+ * @sched_scan_start: Tell the driver to start a periodic scan.
+ * @sched_scan_stop: Tell the driver to stop an ongoing periodic scan.
*
* @mgmt_frame_register: Notify driver that a management frame type was
* registered. Note that this callback may not sleep, and cannot run
@@ -1351,6 +1380,12 @@ struct cfg80211_ops {
int (*set_antenna)(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant);
int (*get_antenna)(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant);
+
+ int (*sched_scan_start)(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct cfg80211_sched_scan_request *request);
+ int (*sched_scan_stop)(struct wiphy *wiphy,
+ struct net_device *dev);
};
/*
@@ -1393,6 +1428,7 @@ struct cfg80211_ops {
* control port protocol ethertype. The device also honours the
* control_port_no_encrypt flag.
* @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN.
+ * @WIPHY_FLAG_SCHED_SCAN: The device supports scheduled scans
*/
enum wiphy_flags {
WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0),
@@ -1404,6 +1440,7 @@ enum wiphy_flags {
WIPHY_FLAG_4ADDR_STATION = BIT(6),
WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7),
WIPHY_FLAG_IBSS_RSN = BIT(8),
+ WIPHY_FLAG_SUPPORTS_SCHED_SCAN = BIT(9),
};
struct mac_address {
@@ -1457,6 +1494,8 @@ struct ieee80211_txrx_stypes {
* @max_scan_ie_len: maximum length of user-controlled IEs device can
* add to probe request frames transmitted during a scan, must not
* include fixed IEs like supported rates
+ * @max_sched_scan_ssids: maximum number of SSIDs the device can use in
+ * periodic scans
* @coverage_class: current coverage class
* @fw_version: firmware version for ethtool reporting
* @hw_version: hardware version for ethtool reporting
@@ -1493,6 +1532,8 @@ struct wiphy {
u8 max_scan_ssids;
u16 max_scan_ie_len;
+ u8 max_sched_scan_ssids;
+
int n_cipher_suites;
const u32 *cipher_suites;
@@ -2170,6 +2211,13 @@ int cfg80211_wext_siwpmksa(struct net_device *dev,
void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted);
/**
+ * cfg80211_sched_scan_results - notify that new scan results are available
+ *
+ * @request: the corresponding periodic scan request
+ */
+void cfg80211_sched_scan_results(struct wiphy *wiphy);
+
+/**
* cfg80211_inform_bss_frame - inform cfg80211 of a received BSS frame
*
* @wiphy: the wiphy reporting the BSS
@@ -365,6 +365,7 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
spin_lock_init(&rdev->bss_lock);
INIT_LIST_HEAD(&rdev->bss_list);
INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
+ INIT_WORK(&rdev->sched_scan_wk, __cfg80211_sched_scan_results);
#ifdef CONFIG_CFG80211_WEXT
rdev->wiphy.wext = &cfg80211_wext_handler;
@@ -647,6 +648,11 @@ static void wdev_cleanup_work(struct work_struct *work)
___cfg80211_scan_done(rdev, true);
}
+ if (rdev->sched_scan_req &&
+ rdev->sched_scan_req->dev == wdev->netdev) {
+ nl80211_sched_scan_stopped(rdev, wdev->netdev);
+ }
+
cfg80211_unlock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
@@ -60,8 +60,10 @@ struct cfg80211_registered_device {
struct rb_root bss_tree;
u32 bss_generation;
struct cfg80211_scan_request *scan_req; /* protected by RTNL */
+ struct cfg80211_sched_scan_request *sched_scan_req;
unsigned long suspend_at;
struct work_struct scan_done_wk;
+ struct work_struct sched_scan_wk;
#ifdef CONFIG_NL80211_TESTMODE
struct genl_info *testmode_info;
@@ -396,6 +398,7 @@ void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
void cfg80211_sme_disassoc(struct net_device *dev, int idx);
void __cfg80211_scan_done(struct work_struct *wk);
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
+void __cfg80211_sched_scan_results(struct work_struct *wk);
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
struct net_device *dev, enum nl80211_iftype ntype,
@@ -683,6 +683,8 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
}
CMD(set_channel, SET_CHANNEL);
CMD(set_wds_peer, SET_WDS_PEER);
+ if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
+ CMD(sched_scan_start, START_SCHED_SCAN);
#undef CMD
@@ -3106,6 +3108,200 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int nl80211_start_sched_scan(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_sched_scan_request *request;
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct cfg80211_ssid *ssid;
+ struct ieee80211_channel *channel;
+ struct nlattr *attr;
+ struct wiphy *wiphy;
+ int err, tmp, n_ssids = 0, n_channels, i;
+ enum ieee80211_band band;
+ size_t ie_len;
+
+ if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
+ return -EINVAL;
+
+ printk(KERN_DEBUG "nl80211_start_sched_scan\n");
+
+ if (!rdev->ops->sched_scan_start) {
+ return -EOPNOTSUPP;
+ }
+
+ if (rdev->sched_scan_req) {
+ return -EINPROGRESS;
+ }
+
+ wiphy = &rdev->wiphy;
+
+ if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
+ n_channels = validate_scan_freqs(
+ info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
+ if (!n_channels)
+ return -EINVAL;
+ } else {
+ n_channels = 0;
+
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+ if (wiphy->bands[band])
+ n_channels += wiphy->bands[band]->n_channels;
+ }
+
+ if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
+ nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
+ n_ssids++;
+
+ if (n_ssids > wiphy->max_sched_scan_ssids)
+ return -EINVAL;
+
+ if (info->attrs[NL80211_ATTR_IE])
+ ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
+ else
+ ie_len = 0;
+
+ if (ie_len > wiphy->max_scan_ie_len)
+ return -EINVAL;
+
+ request = kzalloc(sizeof(*request)
+ + sizeof(*ssid) * n_ssids
+ + sizeof(channel) * n_channels
+ + ie_len, GFP_KERNEL);
+ if (!request)
+ return -ENOMEM;
+
+ if (n_ssids)
+ request->ssids = (void *)&request->channels[n_channels];
+ request->n_ssids = n_ssids;
+ if (ie_len) {
+ if (request->ssids)
+ request->ie = (void *)(request->ssids + n_ssids);
+ else
+ request->ie = (void *)(request->channels + n_channels);
+ }
+
+ i = 0;
+ if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
+ /* user specified, bail out if channel not found */
+ nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
+ struct ieee80211_channel *chan;
+
+ chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
+
+ if (!chan) {
+ err = -EINVAL;
+ goto out_free;
+ }
+
+ /* ignore disabled channels */
+ if (chan->flags & IEEE80211_CHAN_DISABLED)
+ continue;
+
+ request->channels[i] = chan;
+ i++;
+ }
+ } else {
+ /* all channels */
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ int j;
+ if (!wiphy->bands[band])
+ continue;
+ for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
+ struct ieee80211_channel *chan;
+
+ chan = &wiphy->bands[band]->channels[j];
+
+ if (chan->flags & IEEE80211_CHAN_DISABLED)
+ continue;
+
+ request->channels[i] = chan;
+ i++;
+ }
+ }
+ }
+
+ if (!i) {
+ err = -EINVAL;
+ goto out_free;
+ }
+
+ request->n_channels = i;
+
+ i = 0;
+ if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
+ nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
+ if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
+ err = -EINVAL;
+ goto out_free;
+ }
+ memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
+ request->ssids[i].ssid_len = nla_len(attr);
+ i++;
+ }
+ }
+
+ if (info->attrs[NL80211_ATTR_IE]) {
+ request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
+ memcpy((void *)request->ie,
+ nla_data(info->attrs[NL80211_ATTR_IE]),
+ request->ie_len);
+ }
+
+ request->dev = dev;
+ request->wiphy = &rdev->wiphy;
+
+ rdev->sched_scan_req = request;
+
+ err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
+ if (!err) {
+ nl80211_send_sched_scan(rdev, dev,
+ NL80211_CMD_START_SCHED_SCAN);
+ dev_hold(dev);
+ } else {
+out_free:
+ kfree(request);
+ rdev->sched_scan_req = NULL;
+ }
+
+ return err;
+}
+
+void nl80211_sched_scan_stopped(struct cfg80211_registered_device *rdev,
+ struct net_device *dev)
+{
+ dev_put(dev);
+ kfree(rdev->sched_scan_req);
+ rdev->sched_scan_req = NULL;
+}
+
+static int nl80211_stop_sched_scan(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ int err;
+
+ printk(KERN_DEBUG "nl80211_stop_sched_scan\n");
+
+ if (!rdev->ops->sched_scan_stop)
+ return -EOPNOTSUPP;
+
+ if (!rdev->sched_scan_req)
+ return 0;
+
+ err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev);
+ if (err)
+ goto out;
+
+ nl80211_send_sched_scan(rdev, dev, NL80211_CMD_STOP_SCHED_SCAN);
+
+ nl80211_sched_scan_stopped(rdev, dev);
+out:
+ return err;
+}
+
static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
@@ -4876,6 +5072,22 @@ static struct genl_ops nl80211_ops[] = {
.dumpit = nl80211_dump_scan,
},
{
+ .cmd = NL80211_CMD_START_SCHED_SCAN,
+ .doit = nl80211_start_sched_scan,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+ NL80211_FLAG_NEED_RTNL,
+ },
+ {
+ .cmd = NL80211_CMD_STOP_SCHED_SCAN,
+ .doit = nl80211_stop_sched_scan,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+ NL80211_FLAG_NEED_RTNL,
+ },
+ {
.cmd = NL80211_CMD_AUTHENTICATE,
.doit = nl80211_authenticate,
.policy = nl80211_policy,
@@ -5185,6 +5397,28 @@ static int nl80211_send_scan_msg(struct sk_buff *msg,
return -EMSGSIZE;
}
+static int
+nl80211_send_sched_scan_msg(struct sk_buff *msg,
+ struct cfg80211_registered_device *rdev,
+ struct net_device *netdev,
+ u32 pid, u32 seq, int flags, u32 cmd)
+{
+ void *hdr;
+
+ hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
+ if (!hdr)
+ return -1;
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+
+ return genlmsg_end(msg, hdr);
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
@@ -5242,6 +5476,43 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
nl80211_scan_mcgrp.id, GFP_KERNEL);
}
+void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev)
+{
+ struct sk_buff *msg;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
+ NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_scan_mcgrp.id, GFP_KERNEL);
+}
+
+void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u32 cmd)
+{
+ struct sk_buff *msg;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_scan_mcgrp.id, GFP_KERNEL);
+}
+
/*
* This can happen on global regulatory changes or device specific settings
* based on custom world regulatory domains.
@@ -12,6 +12,10 @@ void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
+void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u32 cmd);
+void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev);
void nl80211_send_reg_change_event(struct regulatory_request *request);
void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
struct net_device *netdev,
@@ -91,5 +95,7 @@ void
nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *peer,
u32 num_packets, gfp_t gfp);
+void nl80211_sched_scan_stopped(struct cfg80211_registered_device *rdev,
+ struct net_device *dev);
#endif /* __NET_WIRELESS_NL80211_H */
@@ -93,6 +93,24 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
}
EXPORT_SYMBOL(cfg80211_scan_done);
+void __cfg80211_sched_scan_results(struct work_struct *wk)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(wk, struct cfg80211_registered_device,
+ sched_scan_wk);
+
+ cfg80211_lock_rdev(rdev);
+ nl80211_send_sched_scan_results(rdev, rdev->sched_scan_req->dev);
+ cfg80211_unlock_rdev(rdev);
+}
+
+void cfg80211_sched_scan_results(struct wiphy *wiphy)
+{
+ queue_work(cfg80211_wq, &wiphy_to_dev(wiphy)->sched_scan_wk);
+}
+EXPORT_SYMBOL(cfg80211_sched_scan_results);
+
static void bss_release(struct kref *ref)
{
struct cfg80211_internal_bss *bss;