* @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons,
* partial scan results may be available
*
+ * @NL80211_CMD_START_SCHED_SCAN: start a scheduled scan. Like with normal
+ * scans, if SSIDs (%NL80211_ATTR_SCAN_SSIDS) are passed, they are used
+ * in the probe requests. For broadcast, a broadcast SSID must be
+ * passed (ie. an empty string). If no SSID is passed, no probe
+ * requests are sent and a passive scan is performed.
+ * %NL80211_ATTR_SCAN_FREQUENCIES, if passed, define which channels
+ * should be scanned; if not passed, all channels allowed for the
+ * current regulatory domain are used. Extra IEs can also be passed
+ * from the userspace by using the %NL80211_ATTR_IE attribute.
+ * @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan
+ * @NL80211_CMD_SCHED_SCAN_RESULTS: indicates that there are scheduled scan
+ * results available.
+ * @NL80211_CMD_SCHED_SCAN_STOPPED: indicates that the scheduled scan has
+ * stopped. The driver may issue this event at any time during a
+ * scheduled scan. One reason for stopping the scan is if the hardware
+ * does not support starting an association or a normal scan while running
+ * a scheduled scan. This event is also sent when the
+ * %NL80211_CMD_STOP_SCHED_SCAN command is received or when the interface
+ * is brought down while a scheduled scan was running.
+ *
* @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
NL80211_CMD_GET_WOWLAN,
NL80211_CMD_SET_WOWLAN,
+ NL80211_CMD_START_SCHED_SCAN,
+ NL80211_CMD_STOP_SCHED_SCAN,
+ NL80211_CMD_SCHED_SCAN_RESULTS,
+ NL80211_CMD_SCHED_SCAN_STOPPED,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
struct ieee80211_channel *channels[0];
};
+/**
+ * struct cfg80211_sched_scan_request - scheduled scan request description
+ *
+ * @ssids: SSIDs to scan for (passed in the probe_reqs in active scans)
+ * @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
*
* @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 scheduled scan.
+ * @sched_scan_stop: Tell the driver to stop an ongoing scheduled
+ * scan. The driver_initiated flag specifies whether the driver
+ * itself has informed that the scan has stopped.
*
* @mgmt_frame_register: Notify driver that a management frame type was
* registered. Note that this callback may not sleep, and cannot run
int (*set_ringparam)(struct wiphy *wiphy, u32 tx, u32 rx);
void (*get_ringparam)(struct wiphy *wiphy,
u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
+
+ 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,
+ bool driver_initiated);
};
/*
* @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN.
* @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing
* auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH.
+ * @WIPHY_FLAG_SCHED_SCAN: The device supports scheduled scans.
*/
enum wiphy_flags {
WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0),
WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7),
WIPHY_FLAG_IBSS_RSN = BIT(8),
WIPHY_FLAG_MESH_AUTH = BIT(10),
+ WIPHY_FLAG_SUPPORTS_SCHED_SCAN = BIT(11),
};
struct mac_address {
*/
void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted);
+/**
+ * cfg80211_sched_scan_results - notify that new scan results are available
+ *
+ * @wiphy: the wiphy which got scheduled scan results
+ */
+void cfg80211_sched_scan_results(struct wiphy *wiphy);
+
+/**
+ * cfg80211_sched_scan_stopped - notify that the scheduled scan has stopped
+ *
+ * @wiphy: the wiphy on which the scheduled scan stopped
+ *
+ * The driver can call this function to inform cfg80211 that the
+ * scheduled scan had to be stopped, for whatever reason. The driver
+ * is then called back via the sched_scan_stop operation when done.
+ */
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy);
+
/**
* cfg80211_inform_bss_frame - inform cfg80211 of a received BSS frame
*
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_results_wk, __cfg80211_sched_scan_results);
+ INIT_WORK(&rdev->sched_scan_stopped_wk, __cfg80211_sched_scan_stopped);
#ifdef CONFIG_CFG80211_WEXT
rdev->wiphy.wext = &cfg80211_wext_handler;
#endif
___cfg80211_scan_done(rdev, true);
}
+ if (WARN_ON(rdev->sched_scan_req &&
+ rdev->sched_scan_req->dev == wdev->netdev)) {
+ __cfg80211_stop_sched_scan(rdev, false);
+ }
+
cfg80211_unlock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
break;
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_STATION:
+ cfg80211_lock_rdev(rdev);
+ __cfg80211_stop_sched_scan(rdev, false);
+ cfg80211_unlock_rdev(rdev);
+
wdev_lock(wdev);
#ifdef CONFIG_CFG80211_WEXT
kfree(wdev->wext.ie);
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_results_wk;
+ struct work_struct sched_scan_stopped_wk;
#ifdef CONFIG_NL80211_TESTMODE
struct genl_info *testmode_info;
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);
+int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
+ bool driver_initiated);
+void __cfg80211_sched_scan_stopped(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,
}
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
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 (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
+ !rdev->ops->sched_scan_start)
+ return -EOPNOTSUPP;
+
+ if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
+ return -EINVAL;
+
+ 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_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;
+
+ err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
+ if (!err) {
+ rdev->sched_scan_req = request;
+ nl80211_send_sched_scan(rdev, dev,
+ NL80211_CMD_START_SCHED_SCAN);
+ goto out;
+ }
+
+out_free:
+ kfree(request);
+out:
+ return err;
+}
+
+static int nl80211_stop_sched_scan(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
+ !rdev->ops->sched_scan_stop)
+ return -EOPNOTSUPP;
+
+ return __cfg80211_stop_sched_scan(rdev, false);
+}
+
static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
.policy = nl80211_policy,
.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,
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)
{
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.
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,
}
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_results_wk);
+
+ cfg80211_lock_rdev(rdev);
+
+ /* we don't have sched_scan_req anymore if the scan is stopping */
+ if (rdev->sched_scan_req)
+ nl80211_send_sched_scan_results(rdev,
+ rdev->sched_scan_req->dev);
+
+ cfg80211_unlock_rdev(rdev);
+}
+
+void cfg80211_sched_scan_results(struct wiphy *wiphy)
+{
+ /* ignore if we're not scanning */
+ if (wiphy_to_dev(wiphy)->sched_scan_req)
+ queue_work(cfg80211_wq,
+ &wiphy_to_dev(wiphy)->sched_scan_results_wk);
+}
+EXPORT_SYMBOL(cfg80211_sched_scan_results);
+
+void __cfg80211_sched_scan_stopped(struct work_struct *wk)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(wk, struct cfg80211_registered_device,
+ sched_scan_stopped_wk);
+
+ cfg80211_lock_rdev(rdev);
+ __cfg80211_stop_sched_scan(rdev, true);
+ cfg80211_unlock_rdev(rdev);
+}
+
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
+{
+ queue_work(cfg80211_wq, &wiphy_to_dev(wiphy)->sched_scan_stopped_wk);
+}
+EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
+
+int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
+ bool driver_initiated)
+{
+ int err;
+ struct net_device *dev;
+
+ ASSERT_RDEV_LOCK(rdev);
+
+ if (!rdev->sched_scan_req)
+ return 0;
+
+ dev = rdev->sched_scan_req->dev;
+
+ err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev,
+ driver_initiated);
+ if (err)
+ return err;
+
+ nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED);
+
+ kfree(rdev->sched_scan_req);
+ rdev->sched_scan_req = NULL;
+
+ return err;
+}
+
static void bss_release(struct kref *ref)
{
struct cfg80211_internal_bss *bss;
projects / ~andy / linux / commitdiff