Add NL80211_CMD_START_PERIODIC_SCAN and NL80211_CMD_STOP_PERIDIODIC_SCAN
commands to the nl80211 interface. This is just a skeleton and no actual
functionality is implemented.
Signed-off-by: Luciano Coelho <luciano.coelho@xxxxxxxxx>
---
include/linux/nl80211.h | 6 ++
net/wireless/nl80211.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++
net/wireless/nl80211.h | 2 +
3 files changed, 134 insertions(+), 0 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 0edb256..b3d1306 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -199,6 +199,9 @@
* @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons,
* partial scan results may be available
*
+ * @NL80211_CMD_START_PERIODIC_SCAN: start a periodic scan
+ * @NL80211_CMD_STOP_PERIODIC_SCAN: stop a periodic scan
+ *
* @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
@@ -443,6 +446,9 @@ enum nl80211_commands {
NL80211_CMD_NEW_SCAN_RESULTS,
NL80211_CMD_SCAN_ABORTED,
+ NL80211_CMD_START_PERIODIC_SCAN,
+ NL80211_CMD_STOP_PERIODIC_SCAN,
+
NL80211_CMD_REG_CHANGE,
NL80211_CMD_AUTHENTICATE,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c506241..a2293ea 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2998,6 +2998,80 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int nl80211_start_periodic(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ int err;
+
+ printk("nl80211_start_periodic\n");
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto out_rtnl;
+
+ if (!netif_running(dev)) {
+ err = -ENETDOWN;
+ goto out;
+ }
+
+ /* add actual calls here */
+
+ if (!err) {
+ nl80211_send_periodic(rdev, dev,
+ NL80211_CMD_START_PERIODIC_SCAN);
+ dev_hold(dev);
+ }
+
+out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+out_rtnl:
+ rtnl_unlock();
+
+ return err;
+}
+
+static int nl80211_stop_periodic(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ int err;
+
+ printk("nl80211_stop_periodic\n");
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto out_rtnl;
+
+ if (!netif_running(dev)) {
+ err = -ENETDOWN;
+ goto out;
+ }
+
+ /* add actual calls here */
+
+ if (!err) {
+ nl80211_send_periodic(rdev, dev,
+ NL80211_CMD_STOP_PERIODIC_SCAN);
+ dev_hold(dev);
+ }
+
+out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+out_rtnl:
+ rtnl_unlock();
+
+ 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,
@@ -4665,6 +4739,18 @@ static struct genl_ops nl80211_ops[] = {
.dumpit = nl80211_dump_scan,
},
{
+ .cmd = NL80211_CMD_START_PERIODIC_SCAN,
+ .doit = nl80211_start_periodic,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_STOP_PERIODIC_SCAN,
+ .doit = nl80211_stop_periodic,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
.cmd = NL80211_CMD_AUTHENTICATE,
.doit = nl80211_authenticate,
.policy = nl80211_policy,
@@ -4950,6 +5036,28 @@ static int nl80211_send_scan_msg(struct sk_buff *msg,
return -EMSGSIZE;
}
+static int nl80211_send_periodic_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)
{
@@ -5007,6 +5115,24 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
nl80211_scan_mcgrp.id, GFP_KERNEL);
}
+void nl80211_send_periodic(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_periodic_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.
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 30d2f93..435d452 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -12,6 +12,8 @@ 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_periodic(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u32 cmd);
void nl80211_send_reg_change_event(struct regulatory_request *request);
void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
struct net_device *netdev,
--
1.7.0.4
--
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