Add 'signal_poll' command interface

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

wpa_supplicant/ctrl_iface.c

@@ -2870,6 +2870,26 @@ static int wpa_supplicant_ctrl_iface_sta_autoconnect(
 }
 
 
+static int wpa_supplicant_signal_poll(struct wpa_supplicant *wpa_s, char *buf,
+				      size_t buflen)
+{
+	struct wpa_signal_info si;
+	int ret;
+
+	ret = wpa_drv_signal_poll(wpa_s, &si);
+	if (ret)
+		return -1;
+
+	ret = os_snprintf(buf, buflen, "RSSI=%d\nLINKSPEED=%d\n"
+			  "NOISE=%d\nFREQUENCY=%u\n",
+			  si.current_signal, si.current_txrate / 1000,
+			  si.current_noise, si.frequency);
+	if (ret < 0 || (unsigned int) ret > buflen)
+		return -1;
+	return ret;
+}
+
+
 char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 					 char *buf, size_t *resp_len)
 {
@@ -3262,6 +3282,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 		if (wpa_supplicant_ctrl_iface_tdls_teardown(wpa_s, buf + 14))
 			reply_len = -1;
 #endif /* CONFIG_TDLS */
+	} else if (os_strncmp(buf, "SIGNAL_POLL", 11) == 0) {
+		reply_len = wpa_supplicant_signal_poll(wpa_s, reply,
+						       reply_size);
 	} else {
 		os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 		reply_len = 16;

wpa_supplicant/wpa_cli.c

@@ -2293,6 +2293,13 @@ static int wpa_cli_cmd_tdls_teardown(struct wpa_ctrl *ctrl, int argc,
 }
 
 
+static int wpa_cli_cmd_signal_poll(struct wpa_ctrl *ctrl, int argc,
+				   char *argv[])
+{
+	return wpa_ctrl_command(ctrl, "SIGNAL_POLL");
+}
+
+
 enum wpa_cli_cmd_flags {
 	cli_cmd_flag_none		= 0x00,
 	cli_cmd_flag_sensitive		= 0x01
@@ -2608,6 +2615,9 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "tdls_teardown", wpa_cli_cmd_tdls_teardown,
 	  cli_cmd_flag_none,
 	  "<addr> = tear down TDLS with <addr>" },
+	{ "signal_poll", wpa_cli_cmd_signal_poll,
+	  cli_cmd_flag_none,
+	  "= get signal parameters" },
 	{ NULL, NULL, cli_cmd_flag_none, NULL }
 };