[RFC PATCH 2/2] nl80211: implement beacon change notifier
From: Sergey Matyukevich <hidden>
Date: 2017-11-09 09:40:55
Subsystem:
802.11 (including cfg80211/nl80211), the rest · Maintainers:
Johannes Berg, Linus Torvalds
From: Vasily Ulyanov <redacted> Notify user-space listeners about beacon data change. Signed-off-by: Vasily Ulyanov <redacted> --- net/wireless/nl80211.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f03f9989efbc..98e52e5ffc13 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c@@ -3950,6 +3950,26 @@ static int nl80211_send_beacon(struct sk_buff *msg, u32 portid, return -EMSGSIZE; } +static void nl80211_notify_beacon_change(struct net_device *dev, + enum nl80211_commands cmd, + struct cfg80211_beacon_data *bcn) +{ + struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; + struct sk_buff *msg; + + msg = nlmsg_new(nl80211_beacon_size(bcn), GFP_KERNEL); + if (!msg) + return; + + if (nl80211_send_beacon(msg, cmd, 0, 0, 0, bcn) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0, + NL80211_MCGRP_MLME, GFP_KERNEL); +} + static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params, const u8 *rates) {
@@ -4250,6 +4270,8 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) wdev->ssid_len = params.ssid_len; memcpy(wdev->ssid, params.ssid, wdev->ssid_len); nl80211_assign_beacon(&wdev->beacon, &new_bcn); + nl80211_notify_beacon_change(dev, NL80211_CMD_START_AP, + &wdev->beacon); } wdev_unlock(wdev);
@@ -4317,8 +4339,11 @@ static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info) wdev_lock(wdev); err = rdev_change_beacon(rdev, dev, ¶ms); - if (!err) + if (!err) { nl80211_assign_beacon(&wdev->beacon, &merged_bcn); + nl80211_notify_beacon_change(dev, NL80211_CMD_SET_BEACON, + &wdev->beacon); + } wdev_unlock(wdev); if (err)
--
2.11.0