cfg80211: send regulatory beacon hint events to userspace

[safe/jmp/linux-2.6] / net / wireless / nl80211.c

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7285bdc..85b5aa3 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3491,6 +3491,60 @@ void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
        nlmsg_free(msg);
 }
 
+void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
+                                   struct ieee80211_channel *channel_before,
+                                   struct ieee80211_channel *channel_after)
+{
+       struct sk_buff *msg;
+       void *hdr;
+       struct nlattr *nl_freq;
+
+       msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+       if (!msg)
+               return;
+
+       hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
+       if (!hdr) {
+               nlmsg_free(msg);
+               return;
+       }
+
+       /*
+        * Since we are applying the beacon hint to a wiphy we know its
+        * wiphy_idx is valid
+        */
+       NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
+
+       /* Before */
+       nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
+       if (!nl_freq)
+               goto nla_put_failure;
+       if (nl80211_msg_put_channel(msg, channel_before))
+               goto nla_put_failure;
+       nla_nest_end(msg, nl_freq);
+
+       /* After */
+       nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
+       if (!nl_freq)
+               goto nla_put_failure;
+       if (nl80211_msg_put_channel(msg, channel_after))
+               goto nla_put_failure;
+       nla_nest_end(msg, nl_freq);
+
+       if (genlmsg_end(msg, hdr) < 0) {
+               nlmsg_free(msg);
+               return;
+       }
+
+       genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
+
+       return;
+
+nla_put_failure:
+       genlmsg_cancel(msg, hdr);
+       nlmsg_free(msg);
+}
+
 /* initialisation/exit functions */
 
 int nl80211_init(void)