---

yaml
---
r: 149899
b: refs/heads/master
c: 6bad876
h: refs/heads/master
i:
  149897: 12617f0
  149895: 1121522
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5dab3b8a68cc97a7e6b9f79f5de05803c8e55a3c
+refs/heads/master: 6bad8766620a3c8b64afa981502fdb543e3cfd6c

trunk/include/linux/nl80211.h

@@ -7,7 +7,7 @@
  * Copyright 2008 Michael Wu <flamingice@sourmilk.net>
  * Copyright 2008 Luis Carlos Cobo <luisca@cozybit.com>
  * Copyright 2008 Michael Buesch <mb@bu3sch.de>
- * Copyright 2008 Luis R. Rodriguez <lrodriguez@atheros.com>
+ * Copyright 2008, 2009 Luis R. Rodriguez <lrodriguez@atheros.com>
  * Copyright 2008 Jouni Malinen <jouni.malinen@atheros.com>
  * Copyright 2008 Colin McCabe <colin@cozybit.com>
  *
@@ -166,6 +166,22 @@
  * 	set (%NL80211_ATTR_REG_TYPE), if the type of regulatory domain is
  * 	%NL80211_REG_TYPE_COUNTRY the alpha2 to which we have moved on
  * 	to (%NL80211_ATTR_REG_ALPHA2).
+ * @NL80211_CMD_REG_BEACON_HINT: indicates to userspace that an AP beacon
+ * 	has been found while world roaming thus enabling active scan or
+ * 	any mode of operation that initiates TX (beacons) on a channel
+ * 	where we would not have been able to do either before. As an example
+ * 	if you are world roaming (regulatory domain set to world or if your
+ * 	driver is using a custom world roaming regulatory domain) and while
+ * 	doing a passive scan on the 5 GHz band you find an AP there (if not
+ * 	on a DFS channel) you will now be able to actively scan for that AP
+ * 	or use AP mode on your card on that same channel. Note that this will
+ * 	never be used for channels 1-11 on the 2 GHz band as they are always
+ * 	enabled world wide. This beacon hint is only sent if your device had
+ * 	either disabled active scanning or beaconing on a channel. We send to
+ * 	userspace the wiphy on which we removed a restriction from
+ * 	(%NL80211_ATTR_WIPHY) and the channel on which this occurred
+ * 	before (%NL80211_ATTR_FREQ_BEFORE) and after (%NL80211_ATTR_FREQ_AFTER)
+ * 	the beacon hint was processed.
  *
  * @NL80211_CMD_AUTHENTICATE: authentication request and notification.
  *	This command is used both as a command (request to authenticate) and
@@ -270,6 +286,8 @@ enum nl80211_commands {
 
 	NL80211_CMD_MICHAEL_MIC_FAILURE,
 
+	NL80211_CMD_REG_BEACON_HINT,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -288,6 +306,7 @@ enum nl80211_commands {
 #define NL80211_CMD_ASSOCIATE NL80211_CMD_ASSOCIATE
 #define NL80211_CMD_DEAUTHENTICATE NL80211_CMD_DEAUTHENTICATE
 #define NL80211_CMD_DISASSOCIATE NL80211_CMD_DISASSOCIATE
+#define NL80211_CMD_REG_BEACON_HINT NL80211_CMD_REG_BEACON_HINT
 
 /**
  * enum nl80211_attrs - nl80211 netlink attributes
@@ -423,6 +442,17 @@ enum nl80211_commands {
  * @NL80211_ATTR_KEY_TYPE: Key Type, see &enum nl80211_key_type, represented as
  *	a u32
  *
+ * @NL80211_ATTR_FREQ_BEFORE: A channel which has suffered a regulatory change
+ * 	due to considerations from a beacon hint. This attribute reflects
+ * 	the state of the channel _before_ the beacon hint processing. This
+ * 	attributes consists of a nested attribute containing
+ * 	NL80211_FREQUENCY_ATTR_*
+ * @NL80211_ATTR_FREQ_AFTER: A channel which has suffered a regulatory change
+ * 	due to considerations from a beacon hint. This attribute reflects
+ * 	the state of the channel _after_ the beacon hint processing. This
+ * 	attributes consists of a nested attribute containing
+ * 	NL80211_FREQUENCY_ATTR_*
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -511,6 +541,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_MAX_SCAN_IE_LEN,
 
+	NL80211_ATTR_FREQ_BEFORE,
+	NL80211_ATTR_FREQ_AFTER,
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,

trunk/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)

trunk/net/wireless/nl80211.h

@@ -29,4 +29,9 @@ nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
 			    enum nl80211_key_type key_type,
 			    int key_id, const u8 *tsc);
 
+extern void
+nl80211_send_beacon_hint_event(struct wiphy *wiphy,
+			       struct ieee80211_channel *channel_before,
+			       struct ieee80211_channel *channel_after);
+
 #endif /* __NET_WIRELESS_NL80211_H */

trunk/net/wireless/reg.c

@@ -1049,18 +1049,10 @@ static void handle_reg_beacon(struct wiphy *wiphy,
 			      unsigned int chan_idx,
 			      struct reg_beacon *reg_beacon)
 {
-#ifdef CONFIG_CFG80211_REG_DEBUG
-#define REG_DEBUG_BEACON_FLAG(desc) \
-	printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \
-		"frequency: %d MHz (Ch %d) on %s\n", \
-		reg_beacon->chan.center_freq, \
-		ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \
-		wiphy_name(wiphy));
-#else
-#define REG_DEBUG_BEACON_FLAG(desc) do {} while (0)
-#endif
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *chan;
+	bool channel_changed = false;
+	struct ieee80211_channel chan_before;
 
 	assert_cfg80211_lock();
 
@@ -1070,20 +1062,28 @@ static void handle_reg_beacon(struct wiphy *wiphy,
 	if (likely(chan->center_freq != reg_beacon->chan.center_freq))
 		return;
 
+	if (chan->beacon_found)
+		return;
+
+	chan->beacon_found = true;
+
+	chan_before.center_freq = chan->center_freq;
+	chan_before.flags = chan->flags;
+
 	if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 	    !(chan->orig_flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
 		chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
-		REG_DEBUG_BEACON_FLAG("active scanning");
+		channel_changed = true;
 	}
 
 	if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 	    !(chan->orig_flags & IEEE80211_CHAN_NO_IBSS)) {
 		chan->flags &= ~IEEE80211_CHAN_NO_IBSS;
-		REG_DEBUG_BEACON_FLAG("beaconing");
+		channel_changed = true;
 	}
 
-	chan->beacon_found = true;
-#undef REG_DEBUG_BEACON_FLAG
+	if (channel_changed)
+		nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
 }
 
 /*