wpa_cli: Print nice prompt when using remote UDP

When CONFIG_CTRL_IFACE=udp-remote is used, print user frendly PS in
wpa_cli. E.g.,
localhost/wlan0>
192.168.1.1/p2p-wlan-0-0>

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

src/common/wpa_ctrl.c

@@ -49,6 +49,8 @@ struct wpa_ctrl {
 	struct sockaddr_in local;
 	struct sockaddr_in dest;
 	char *cookie;
+	char *remote_ifname;
+	char *remote_ip;
 #endif /* CONFIG_CTRL_IFACE_UDP */
 #ifdef CONFIG_CTRL_IFACE_UNIX
 	int s;
@@ -302,23 +304,27 @@ struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
 			port_id = WPA_CTRL_IFACE_PORT;
 
 		h = gethostbyname(name);
+		ctrl->remote_ip = os_strdup(name);
 		os_free(name);
 		if (h == NULL) {
 			perror("gethostbyname");
 			close(ctrl->s);
+			os_free(ctrl->remote_ip);
 			os_free(ctrl);
 			return NULL;
 		}
 		ctrl->dest.sin_port = htons(port_id);
 		os_memcpy(h->h_addr, (char *) &ctrl->dest.sin_addr.s_addr,
 			  h->h_length);
-	}
+	} else
+		ctrl->remote_ip = os_strdup("localhost");
 #endif /* CONFIG_CTRL_IFACE_UDP_REMOTE */
 
 	if (connect(ctrl->s, (struct sockaddr *) &ctrl->dest,
 		    sizeof(ctrl->dest)) < 0) {
 		perror("connect");
 		close(ctrl->s);
+		os_free(ctrl->remote_ip);
 		os_free(ctrl);
 		return NULL;
 	}
@@ -329,14 +335,31 @@ struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
 		ctrl->cookie = os_strdup(buf);
 	}
 
+	if (wpa_ctrl_request(ctrl, "IFNAME", 6, buf, &len, NULL) == 0) {
+		buf[len] = '\0';
+		ctrl->remote_ifname = os_strdup(buf);
+	}
+
 	return ctrl;
 }
 
 
+char * wpa_ctrl_get_remote_ifname(struct wpa_ctrl *ctrl)
+{
+#define WPA_CTRL_MAX_PS_NAME 100
+	static char ps[WPA_CTRL_MAX_PS_NAME] = {};
+	os_snprintf(ps, WPA_CTRL_MAX_PS_NAME, "%s/%s",
+		    ctrl->remote_ip, ctrl->remote_ifname);
+	return ps;
+}
+
+
 void wpa_ctrl_close(struct wpa_ctrl *ctrl)
 {
 	close(ctrl->s);
 	os_free(ctrl->cookie);
+	os_free(ctrl->remote_ifname);
+	os_free(ctrl->remote_ip);
 	os_free(ctrl);
 }
 

src/common/wpa_ctrl.h

@@ -286,6 +286,8 @@ int wpa_ctrl_pending(struct wpa_ctrl *ctrl);
  */
 int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl);
 
+char * wpa_ctrl_get_remote_ifname(struct wpa_ctrl *ctrl);
+
 #ifdef ANDROID
 /**
  * wpa_ctrl_cleanup() - Delete any local UNIX domain socket files that

wpa_supplicant/wpa_cli.c

@@ -3806,6 +3806,7 @@ static void wpa_cli_edit_eof_cb(void *ctx)
 static void wpa_cli_interactive(void)
 {
 	char *home, *hfile = NULL;
+	const char *ps = wpa_ctrl_get_remote_ifname(ctrl_conn);
 
 	printf("\nInteractive mode\n\n");
 
@@ -3820,7 +3821,7 @@ static void wpa_cli_interactive(void)
 
 	eloop_register_signal_terminate(wpa_cli_eloop_terminate, NULL);
 	edit_init(wpa_cli_edit_cmd_cb, wpa_cli_edit_eof_cb,
-		  wpa_cli_edit_completion_cb, NULL, hfile, NULL);
+		  wpa_cli_edit_completion_cb, NULL, hfile, ps);
 	eloop_register_timeout(ping_interval, 0, wpa_cli_ping, NULL, NULL);
 
 	eloop_run();