wpa_cli: Add IFNAME command

This command will return wpa_s->ifname that can be used for a nice
prompt in wpa_cli.

Signed-hostap: Janusz Dziedzic <janusz.dziedzic@tieto.com>

wpa_supplicant/ctrl_iface.c

@@ -4120,6 +4120,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 	if (os_strcmp(buf, "PING") == 0) {
 		os_memcpy(reply, "PONG\n", 5);
 		reply_len = 5;
+	} else if (os_strcmp(buf, "IFNAME") == 0) {
+		reply_len = os_strlen(wpa_s->ifname);
+		os_memcpy(reply, wpa_s->ifname, reply_len);
 	} else if (os_strncmp(buf, "RELOG", 5) == 0) {
 		if (wpa_debug_reopen_file() < 0)
 			reply_len = -1;

wpa_supplicant/wpa_cli.c

@@ -430,6 +430,12 @@ static int wpa_ctrl_command(struct wpa_ctrl *ctrl, char *cmd)
 }
 
 
+static int wpa_cli_cmd_ifname(struct wpa_ctrl *ctrl, int argc, char *argv[])
+{
+	return wpa_ctrl_command(ctrl, "IFNAME");
+}
+
+
 static int wpa_cli_cmd_status(struct wpa_ctrl *ctrl, int argc, char *argv[])
 {
 	if (argc > 0 && os_strcmp(argv[0], "verbose") == 0)
@@ -2947,6 +2953,9 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "status", wpa_cli_cmd_status,
 	  cli_cmd_flag_none,
 	  "[verbose] = get current WPA/EAPOL/EAP status" },
+	{ "ifname", wpa_cli_cmd_ifname,
+	  cli_cmd_flag_none,
+	  "= get current interface name" },
 	{ "ping", wpa_cli_cmd_ping,
 	  cli_cmd_flag_none,
 	  "= pings wpa_supplicant" },