Export disconnect reason code to dbus

In the properties changed signal, added a new property
"DisconnectReason", which carries the IEEE 802.11 reason code of the
most recent disassociation or deauthentication event. The reason code is
negative if it is locally generated. The property is sent to the DBUS
immediately so as to prevent it from being coalesced with other
disconnect events.

Signed-off-by: Gary Morain <gmorain@chromium.org>

8 files changed, 55 insertions, 0 deletions

diff --git a/wpa_supplicant/dbus/dbus_new.c b/wpa_supplicant/dbus/dbus_new.c
index a8e87d5..fcdf995 100644
--- a/wpa_supplicant/dbus/dbus_new.c
+++ b/wpa_supplicant/dbus/dbus_new.c
@@ -1735,10 +1735,12 @@ void wpas_dbus_signal_prop_changed(struct wpa_supplicant *wpa_s,
 				   enum wpas_dbus_prop property)
 {
 	char *prop;
+	dbus_bool_t flush;
 
 	if (wpa_s->dbus_new_path == NULL)
 		return; /* Skip signal since D-Bus setup is not yet ready */
 
+	flush = FALSE;
 	switch (property) {
 	case WPAS_DBUS_PROP_AP_SCAN:
 		prop = "ApScan";
@@ -1761,6 +1763,10 @@ void wpas_dbus_signal_prop_changed(struct wpa_supplicant *wpa_s,
 	case WPAS_DBUS_PROP_CURRENT_AUTH_MODE:
 		prop = "CurrentAuthMode";
 		break;
+	case WPAS_DBUS_PROP_DISCONNECT_REASON:
+		prop = "DisconnectReason";
+		flush = TRUE;
+		break;
 	default:
 		wpa_printf(MSG_ERROR, "dbus: %s: Unknown Property value %d",
 			   __func__, property);
@@ -1770,6 +1776,10 @@ void wpas_dbus_signal_prop_changed(struct wpa_supplicant *wpa_s,
 	wpa_dbus_mark_property_changed(wpa_s->global->dbus,
 				       wpa_s->dbus_new_path,
 				       WPAS_DBUS_NEW_IFACE_INTERFACE, prop);
+	if (flush) {
+		wpa_dbus_flush_object_changed_properties(
+			wpa_s->global->dbus->con, wpa_s->dbus_new_path);
+	}
 }
 
 
@@ -2746,6 +2756,10 @@ static const struct wpa_dbus_property_desc wpas_dbus_interface_properties[] = {
 	  NULL
 	},
 #endif /* CONFIG_P2P */
+	{ "DisconnectReason", WPAS_DBUS_NEW_IFACE_INTERFACE, "i",
+	  wpas_dbus_getter_disconnect_reason,
+	  NULL
+	},
 	{ NULL, NULL, NULL, NULL, NULL }
 };
 
diff --git a/wpa_supplicant/dbus/dbus_new.h b/wpa_supplicant/dbus/dbus_new.h
index 4d322a1..3b632c4 100644
--- a/wpa_supplicant/dbus/dbus_new.h
+++ b/wpa_supplicant/dbus/dbus_new.h
@@ -34,6 +34,7 @@ enum wpas_dbus_prop {
 	WPAS_DBUS_PROP_CURRENT_NETWORK,
 	WPAS_DBUS_PROP_CURRENT_AUTH_MODE,
 	WPAS_DBUS_PROP_BSSS,
+	WPAS_DBUS_PROP_DISCONNECT_REASON,
 };
 
 enum wpas_dbus_bss_prop {
diff --git a/wpa_supplicant/dbus/dbus_new_handlers.c b/wpa_supplicant/dbus/dbus_new_handlers.c
index bde2aff..58b941c 100644
--- a/wpa_supplicant/dbus/dbus_new_handlers.c
+++ b/wpa_supplicant/dbus/dbus_new_handlers.c
@@ -2352,6 +2352,27 @@ dbus_bool_t wpas_dbus_setter_fast_reauth(DBusMessageIter *iter,
 
 
 /**
+ * wpas_dbus_getter_disconnect_reason - Get most recent reason for disconnect
+ * @iter: Pointer to incoming dbus message iter
+ * @error: Location to store error on failure
+ * @user_data: Function specific data
+ * Returns: TRUE on success, FALSE on failure
+ *
+ * Getter for "DisconnectReason" property.  The reason is negative if it is
+ * locally generated.
+ */
+dbus_bool_t wpas_dbus_getter_disconnect_reason(DBusMessageIter *iter,
+					       DBusError *error,
+					       void *user_data)
+{
+	struct wpa_supplicant *wpa_s = user_data;
+	dbus_int32_t reason = wpa_s->disconnect_reason;
+	return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_INT32,
+						&reason, error);
+}
+
+
+/**
  * wpas_dbus_getter_bss_expire_age - Get BSS entry expiration age
  * @iter: Pointer to incoming dbus message iter
  * @error: Location to store error on failure
diff --git a/wpa_supplicant/dbus/dbus_new_handlers.h b/wpa_supplicant/dbus/dbus_new_handlers.h
index 8cba724..80a061f 100644
--- a/wpa_supplicant/dbus/dbus_new_handlers.h
+++ b/wpa_supplicant/dbus/dbus_new_handlers.h
@@ -150,6 +150,10 @@ dbus_bool_t wpas_dbus_setter_fast_reauth(DBusMessageIter *iter,
 					 DBusError *error,
 					 void *user_data);
 
+dbus_bool_t wpas_dbus_getter_disconnect_reason(DBusMessageIter *iter,
+					       DBusError *error,
+					       void *user_data);
+
 dbus_bool_t wpas_dbus_getter_bss_expire_age(DBusMessageIter *iter,
 					    DBusError *error, void *user_data);
 
diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index 513a8e8..6685b6b 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -1761,6 +1761,11 @@ static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
 	if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
 		wpas_connection_failed(wpa_s, bssid);
 	wpa_sm_notify_disassoc(wpa_s->wpa);
+	if (locally_generated)
+		wpa_s->disconnect_reason = -reason_code;
+	else
+		wpa_s->disconnect_reason = reason_code;
+	wpas_notify_disconnect_reason(wpa_s);
 	if (!is_zero_ether_addr(bssid) ||
 	    wpa_s->wpa_state >= WPA_AUTHENTICATING) {
 		wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
diff --git a/wpa_supplicant/notify.c b/wpa_supplicant/notify.c
index c4d7e93..0ede0d0 100644
--- a/wpa_supplicant/notify.c
+++ b/wpa_supplicant/notify.c
@@ -97,6 +97,12 @@ void wpas_notify_state_changed(struct wpa_supplicant *wpa_s,
 }
 
 
+void wpas_notify_disconnect_reason(struct wpa_supplicant *wpa_s)
+{
+	wpas_dbus_signal_prop_changed(wpa_s, WPAS_DBUS_PROP_DISCONNECT_REASON);
+}
+
+
 void wpas_notify_network_changed(struct wpa_supplicant *wpa_s)
 {
 	wpas_dbus_signal_prop_changed(wpa_s, WPAS_DBUS_PROP_CURRENT_NETWORK);
diff --git a/wpa_supplicant/notify.h b/wpa_supplicant/notify.h
index e2bf788..58675ac 100644
--- a/wpa_supplicant/notify.h
+++ b/wpa_supplicant/notify.h
@@ -22,6 +22,7 @@ void wpas_notify_iface_removed(struct wpa_supplicant *wpa_s);
 void wpas_notify_state_changed(struct wpa_supplicant *wpa_s,
 			       enum wpa_states new_state,
 			       enum wpa_states old_state);
+void wpas_notify_disconnect_reason(struct wpa_supplicant *wpa_s);
 void wpas_notify_network_changed(struct wpa_supplicant *wpa_s);
 void wpas_notify_ap_scan_changed(struct wpa_supplicant *wpa_s);
 void wpas_notify_bssid_changed(struct wpa_supplicant *wpa_s);
diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index 2d6ee38..b608f29 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -571,6 +571,9 @@ struct wpa_supplicant {
 	} hw;
 
 	int pno;
+
+	/* WLAN_REASON_* reason codes. Negative if locally generated. */
+	int disconnect_reason;
 };