dbus_new: Add DBus TDLS methods

Add DBus methods for TDLS operations similar to those available
for the control interface. This includes Discover, Setup, and
Teardown commands. While here, add a method to query the TDLS
link status and add a DBus method for it.

Tested with CONFIG_TDLS enabled, on a TDLS-enabled host and
peer capable of TDLS:

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSStatus string:<peer-mac-address>

    yields: string "peer does not exist"

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSDiscover string:<peer-mac-address>

    yields no error

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSSetup string:<peer-mac-address>

    yields no error

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSStatus string:<peer-mac-address>

    yields: string "connected" after TDLS completes

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSTeardown string:<peer-mac-address>

    yields no error

    dbus-send --system --dest=fi.w1.wpa_supplicant1 --print-reply \
        /fi/w1/wpa_supplicant1/Interfaces/0 \
        fi.w1.wpa_supplicant1.Interface.TDLSStatus string:<peer-mac-address>

    yields: string "peer not connected"

Signed-hostap: Paul Stewart <pstew@chromium.org>

src/rsn_supp/tdls.c

@@ -797,6 +797,28 @@ void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr)
 }
 
 
+const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr)
+{
+	struct wpa_tdls_peer *peer;
+
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return "disabled";
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL)
+		return "peer does not exist";
+
+	if (!peer->tpk_success)
+		return "peer not connected";
+
+	return "connected";
+}
+
+
 static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr,
 				  const u8 *buf, size_t len)
 {

src/rsn_supp/wpa.h

@@ -380,6 +380,7 @@ void wpa_tdls_teardown_peers(struct wpa_sm *sm);
 void wpa_tdls_deinit(struct wpa_sm *sm);
 void wpa_tdls_enable(struct wpa_sm *sm, int enabled);
 void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr);
+const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr);
 int wpa_tdls_is_external_setup(struct wpa_sm *sm);
 
 int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);

wpa_supplicant/dbus/dbus_new.c

@@ -2736,6 +2736,37 @@ static const struct wpa_dbus_method_desc wpas_dbus_interface_methods[] = {
 	  }
 	},
 #endif /* CONFIG_AUTOSCAN */
+#ifdef CONFIG_TDLS
+	{ "TDLSDiscover", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) wpas_dbus_handler_tdls_discover,
+	  {
+		  { "peer_address", "s", ARG_IN },
+		  END_ARGS
+	  }
+	},
+	{ "TDLSSetup", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) wpas_dbus_handler_tdls_setup,
+	  {
+		  { "peer_address", "s", ARG_IN },
+		  END_ARGS
+	  }
+	},
+	{ "TDLSStatus", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) wpas_dbus_handler_tdls_status,
+	  {
+		  { "peer_address", "s", ARG_IN },
+		  { "status", "s", ARG_OUT },
+		  END_ARGS
+	  }
+	},
+	{ "TDLSTeardown", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) wpas_dbus_handler_tdls_teardown,
+	  {
+		  { "peer_address", "s", ARG_IN },
+		  END_ARGS
+	  }
+	},
+#endif /* CONFIG_TDLS */
 	{ NULL, NULL, NULL, { END_ARGS } }
 };
 

wpa_supplicant/dbus/dbus_new_handlers.c

@@ -1997,6 +1997,170 @@ DBusMessage * wpas_dbus_handler_eap_logon(DBusMessage *message,
 }
 
 
+#ifdef CONFIG_TDLS
+
+static DBusMessage * get_peer_hwaddr_helper(DBusMessage *message,
+					    const char *func_name,
+					    u8 *peer_address)
+{
+	const char *peer_string;
+
+	if (!dbus_message_get_args(message, NULL,
+				   DBUS_TYPE_STRING, &peer_string,
+				   DBUS_TYPE_INVALID))
+		return wpas_dbus_error_invalid_args(message, NULL);
+
+	if (hwaddr_aton(peer_string, peer_address)) {
+		wpa_printf(MSG_DEBUG, "%s: invalid address '%s'",
+			   func_name, peer_string);
+		return wpas_dbus_error_invalid_args(
+			message, "Invalid hardware address format");
+	}
+
+	return NULL;
+}
+
+
+/*
+ * wpas_dbus_handler_tdls_discover - Discover TDLS peer
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: NULL indicating success or DBus error message on failure
+ *
+ * Handler function for "TDLSDiscover" method call of network interface.
+ */
+DBusMessage * wpas_dbus_handler_tdls_discover(DBusMessage *message,
+					      struct wpa_supplicant *wpa_s)
+{
+	u8 peer[ETH_ALEN];
+	DBusMessage *error_reply;
+	int ret;
+
+	error_reply = get_peer_hwaddr_helper(message, __func__, peer);
+	if (error_reply)
+		return error_reply;
+
+	wpa_printf(MSG_DEBUG, "DBUS TDLS_DISCOVER " MACSTR, MAC2STR(peer));
+
+	if (wpa_tdls_is_external_setup(wpa_s->wpa))
+		ret = wpa_tdls_send_discovery_request(wpa_s->wpa, peer);
+	else
+		ret = wpa_drv_tdls_oper(wpa_s, TDLS_DISCOVERY_REQ, peer);
+
+	if (ret) {
+		return wpas_dbus_error_unknown_error(
+			message, "error performing TDLS discovery");
+	}
+
+	return NULL;
+}
+
+
+/*
+ * wpas_dbus_handler_tdls_setup - Setup TDLS session
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: NULL indicating success or DBus error message on failure
+ *
+ * Handler function for "TDLSSetup" method call of network interface.
+ */
+DBusMessage * wpas_dbus_handler_tdls_setup(DBusMessage *message,
+					   struct wpa_supplicant *wpa_s)
+{
+	u8 peer[ETH_ALEN];
+	DBusMessage *error_reply;
+	int ret;
+
+	error_reply = get_peer_hwaddr_helper(message, __func__, peer);
+	if (error_reply)
+		return error_reply;
+
+	wpa_printf(MSG_DEBUG, "DBUS TDLS_SETUP " MACSTR, MAC2STR(peer));
+
+	wpa_tdls_remove(wpa_s->wpa, peer);
+	if (wpa_tdls_is_external_setup(wpa_s->wpa))
+		ret = wpa_tdls_start(wpa_s->wpa, peer);
+	else
+		ret = wpa_drv_tdls_oper(wpa_s, TDLS_SETUP, peer);
+
+	if (ret) {
+		return wpas_dbus_error_unknown_error(
+			message, "error performing TDLS setup");
+	}
+
+	return NULL;
+}
+
+
+/*
+ * wpas_dbus_handler_tdls_status - Return TDLS session status
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: A string representing the state of the link to this TDLS peer
+ *
+ * Handler function for "TDLSStatus" method call of network interface.
+ */
+DBusMessage * wpas_dbus_handler_tdls_status(DBusMessage *message,
+					    struct wpa_supplicant *wpa_s)
+{
+	u8 peer[ETH_ALEN];
+	DBusMessage *reply;
+	const char *tdls_status;
+
+	reply = get_peer_hwaddr_helper(message, __func__, peer);
+	if (reply)
+		return reply;
+
+	wpa_printf(MSG_DEBUG, "DBUS TDLS_STATUS " MACSTR, MAC2STR(peer));
+
+	tdls_status = wpa_tdls_get_link_status(wpa_s->wpa, peer);
+
+	reply = dbus_message_new_method_return(message);
+	dbus_message_append_args(reply, DBUS_TYPE_STRING,
+				 &tdls_status, DBUS_TYPE_INVALID);
+	return reply;
+}
+
+
+/*
+ * wpas_dbus_handler_tdls_teardown - Teardown TDLS session
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: NULL indicating success or DBus error message on failure
+ *
+ * Handler function for "TDLSTeardown" method call of network interface.
+ */
+DBusMessage * wpas_dbus_handler_tdls_teardown(DBusMessage *message,
+					      struct wpa_supplicant *wpa_s)
+{
+	u8 peer[ETH_ALEN];
+	DBusMessage *error_reply;
+	int ret;
+
+	error_reply = get_peer_hwaddr_helper(message, __func__, peer);
+	if (error_reply)
+		return error_reply;
+
+	wpa_printf(MSG_DEBUG, "DBUS TDLS_TEARDOWN " MACSTR, MAC2STR(peer));
+
+	if (wpa_tdls_is_external_setup(wpa_s->wpa))
+		ret = wpa_tdls_teardown_link(
+			wpa_s->wpa, peer,
+			WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
+	else
+		ret = wpa_drv_tdls_oper(wpa_s, TDLS_TEARDOWN, peer);
+
+	if (ret) {
+		return wpas_dbus_error_unknown_error(
+			message, "error performing TDLS teardown");
+	}
+
+	return NULL;
+}
+
+#endif /* CONFIG_TDLS */
+
+
 /**
  * wpas_dbus_getter_capabilities - Return interface capabilities
  * @iter: Pointer to incoming dbus message iter

wpa_supplicant/dbus/dbus_new_handlers.h

@@ -278,6 +278,15 @@ dbus_bool_t wpas_dbus_setter_process_credentials(DBusMessageIter *iter,
 						 DBusError *error,
 						 void *user_data);
 
+DBusMessage * wpas_dbus_handler_tdls_discover(DBusMessage *message,
+					      struct wpa_supplicant *wpa_s);
+DBusMessage * wpas_dbus_handler_tdls_setup(DBusMessage *message,
+					   struct wpa_supplicant *wpa_s);
+DBusMessage * wpas_dbus_handler_tdls_status(DBusMessage *message,
+					    struct wpa_supplicant *wpa_s);
+DBusMessage * wpas_dbus_handler_tdls_teardown(DBusMessage *message,
+					      struct wpa_supplicant *wpa_s);
+
 DBusMessage * wpas_dbus_error_invalid_args(DBusMessage *message,
 					   const char *arg);
 DBusMessage * wpas_dbus_error_unknown_error(DBusMessage *message,