TDLS: Add TDLS_LINK_STATUS command to the control interface

Add the TDLS_LINK_STATUS command to the control interface. This command
shows what is the status of our current TDLS connection with the given
peer. Also, add the TDLS_LINK_STATUS command to wpa_cli.

Signed-off-by: Oren Givon <oren.givon@intel.com>

wpa_supplicant/ctrl_iface.c

@@ -760,6 +760,33 @@ static int wpa_supplicant_ctrl_iface_tdls_cancel_chan_switch(
 	return wpa_tdls_disable_chan_switch(wpa_s->wpa, peer);
 }
 
+
+static int wpa_supplicant_ctrl_iface_tdls_link_status(
+	struct wpa_supplicant *wpa_s, const char *addr,
+	char *buf, size_t buflen)
+{
+	u8 peer[ETH_ALEN];
+	const char *tdls_status;
+	int ret;
+
+	if (hwaddr_aton(addr, peer)) {
+		wpa_printf(MSG_DEBUG,
+			   "CTRL_IFACE TDLS_LINK_STATUS: Invalid address '%s'",
+			   addr);
+		return -1;
+	}
+	wpa_printf(MSG_DEBUG, "CTRL_IFACE TDLS_LINK_STATUS " MACSTR,
+		   MAC2STR(peer));
+
+	tdls_status = wpa_tdls_get_link_status(wpa_s->wpa, peer);
+	wpa_printf(MSG_DEBUG, "CTRL_IFACE TDLS_LINK_STATUS: %s", tdls_status);
+	ret = os_snprintf(buf, buflen, "TDLS link status: %s\n", tdls_status);
+	if (os_snprintf_error(buflen, ret))
+		return -1;
+
+	return ret;
+}
+
 #endif /* CONFIG_TDLS */
 
 
@@ -8415,6 +8442,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 		if (wpa_supplicant_ctrl_iface_tdls_cancel_chan_switch(wpa_s,
 								      buf + 24))
 			reply_len = -1;
+	} else if (os_strncmp(buf, "TDLS_LINK_STATUS ", 17) == 0) {
+		reply_len = wpa_supplicant_ctrl_iface_tdls_link_status(
+			wpa_s, buf + 17, reply, reply_size);
 #endif /* CONFIG_TDLS */
 	} else if (os_strcmp(buf, "WMM_AC_STATUS") == 0) {
 		reply_len = wpas_wmm_ac_status(wpa_s, reply, reply_size);

wpa_supplicant/wpa_cli.c

@@ -2653,6 +2653,13 @@ static int wpa_cli_cmd_tdls_teardown(struct wpa_ctrl *ctrl, int argc,
 }
 
 
+static int wpa_cli_cmd_tdls_link_status(struct wpa_ctrl *ctrl, int argc,
+					char *argv[])
+{
+	return wpa_cli_cmd(ctrl, "TDLS_LINK_STATUS", 1, argc, argv);
+}
+
+
 static int wpa_cli_cmd_wmm_ac_addts(struct wpa_ctrl *ctrl, int argc,
 				    char *argv[])
 {
@@ -3280,6 +3287,9 @@ static const struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "tdls_teardown", wpa_cli_cmd_tdls_teardown, NULL,
 	  cli_cmd_flag_none,
 	  "<addr> = tear down TDLS with <addr>" },
+	{ "tdls_link_status", wpa_cli_cmd_tdls_link_status, NULL,
+	  cli_cmd_flag_none,
+	  "<addr> = TDLS link status with <addr>" },
 	{ "wmm_ac_addts", wpa_cli_cmd_wmm_ac_addts, NULL,
 	  cli_cmd_flag_none,
 	  "<uplink/downlink/bidi> <tsid=0..7> <up=0..7> [nominal_msdu_size=#] "