nl80211: advertise GTK rekey support, new triggers

Since we now have the necessary API in place to support
GTK rekeying, applications will need to know whether it
is supported by a device. Add a pseudo-trigger that is
used only to advertise that capability. Also, add some
new triggers that match what iwlagn devices can do.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/wireless/core.c

@@ -488,6 +488,10 @@ int wiphy_register(struct wiphy *wiphy)
 	int i;
 	u16 ifmodes = wiphy->interface_modes;
 
+	if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
+		    !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
+		return -EINVAL;
+
 	if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
 		return -EINVAL;
 

net/wireless/nl80211.c

@@ -205,6 +205,10 @@ nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 	[NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 	[NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 	[NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
+	[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
+	[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
+	[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
+	[NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 };
 
 /* policy for GTK rekey offload attributes */
@@ -929,6 +933,16 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
+		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
+		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
+		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
+		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
+		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
 		if (dev->wiphy.wowlan.n_patterns) {
 			struct nl80211_wowlan_pattern_support pat = {
 				.max_patterns = dev->wiphy.wowlan.n_patterns,
@@ -5272,6 +5286,14 @@ static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
 			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 		if (rdev->wowlan->magic_pkt)
 			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
+		if (rdev->wowlan->gtk_rekey_failure)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
+		if (rdev->wowlan->eap_identity_req)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
+		if (rdev->wowlan->four_way_handshake)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
+		if (rdev->wowlan->rfkill_release)
+			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
 		if (rdev->wowlan->n_patterns) {
 			struct nlattr *nl_pats, *nl_pat;
 			int i, pat_len;
@@ -5348,6 +5370,33 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
 		new_triggers.magic_pkt = true;
 	}
 
+	if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
+		return -EINVAL;
+
+	if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
+		if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
+			return -EINVAL;
+		new_triggers.gtk_rekey_failure = true;
+	}
+
+	if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
+		if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
+			return -EINVAL;
+		new_triggers.eap_identity_req = true;
+	}
+
+	if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
+		if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
+			return -EINVAL;
+		new_triggers.four_way_handshake = true;
+	}
+
+	if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
+		if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
+			return -EINVAL;
+		new_triggers.rfkill_release = true;
+	}
+
 	if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
 		struct nlattr *pat;
 		int n_patterns = 0;