Allow wpa_cli/hostapd_cli client socket directory to be specified

This adds a new helper function wpa_ctrl_open2() that can be used
instead of wpa_ctrl_open() to override the default client socket
directory. Add optional -s<directory path> argument to hostapd_cli and
wpa_cli to allow the client socket directory to be specified.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

hostapd/hostapd_cli.c

@@ -97,6 +97,7 @@ static int hostapd_cli_attached = 0;
 #define CONFIG_CTRL_IFACE_DIR "/var/run/hostapd"
 #endif /* CONFIG_CTRL_IFACE_DIR */
 static const char *ctrl_iface_dir = CONFIG_CTRL_IFACE_DIR;
+static const char *client_socket_dir = NULL;
 
 static char *ctrl_ifname = NULL;
 static const char *pid_file = NULL;
@@ -119,6 +120,8 @@ static void usage(void)
 		"   -v           shown version information\n"
 		"   -p<path>     path to find control sockets (default: "
 		"/var/run/hostapd)\n"
+		"   -s<dir_path> dir path to open client sockets (default: "
+		CONFIG_CTRL_IFACE_DIR ")\n"
 		"   -a<file>     run in daemon mode executing the action file "
 		"based on events\n"
 		"                from hostapd\n"
@@ -145,7 +148,14 @@ static struct wpa_ctrl * hostapd_cli_open_connection(const char *ifname)
 		return NULL;
 	snprintf(cfile, flen, "%s/%s", ctrl_iface_dir, ifname);
 
-	ctrl_conn = wpa_ctrl_open(cfile);
+	if (client_socket_dir && client_socket_dir[0] &&
+	    access(client_socket_dir, F_OK) < 0) {
+		perror(client_socket_dir);
+		free(cfile);
+		return NULL;
+	}
+
+	ctrl_conn = wpa_ctrl_open2(cfile, client_socket_dir);
 	free(cfile);
 	return ctrl_conn;
 }
@@ -1337,7 +1347,7 @@ int main(int argc, char *argv[])
 		return -1;
 
 	for (;;) {
-		c = getopt(argc, argv, "a:BhG:i:p:P:v");
+		c = getopt(argc, argv, "a:BhG:i:p:P:s:v");
 		if (c < 0)
 			break;
 		switch (c) {
@@ -1366,6 +1376,9 @@ int main(int argc, char *argv[])
 		case 'P':
 			pid_file = optarg;
 			break;
+		case 's':
+			client_socket_dir = optarg;
+			break;
 		default:
 			usage();
 			return -1;

src/common/wpa_ctrl.c

@@ -84,6 +84,13 @@ struct wpa_ctrl {
 
 
 struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
+{
+	return wpa_ctrl_open2(ctrl_path, NULL);
+}
+
+
+struct wpa_ctrl * wpa_ctrl_open2(const char *ctrl_path,
+				 const char *cli_path)
 {
 	struct wpa_ctrl *ctrl;
 	static int counter = 0;
@@ -108,10 +115,18 @@ struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
 	ctrl->local.sun_family = AF_UNIX;
 	counter++;
 try_again:
-	ret = os_snprintf(ctrl->local.sun_path, sizeof(ctrl->local.sun_path),
-			  CONFIG_CTRL_IFACE_CLIENT_DIR "/"
-			  CONFIG_CTRL_IFACE_CLIENT_PREFIX "%d-%d",
-			  (int) getpid(), counter);
+	if (cli_path && cli_path[0] == '/') {
+		ret = os_snprintf(ctrl->local.sun_path,
+				  sizeof(ctrl->local.sun_path),
+				  "%s/" CONFIG_CTRL_IFACE_CLIENT_PREFIX "%d-%d",
+				  cli_path, (int) getpid(), counter);
+	} else {
+		ret = os_snprintf(ctrl->local.sun_path,
+				  sizeof(ctrl->local.sun_path),
+				  CONFIG_CTRL_IFACE_CLIENT_DIR "/"
+				  CONFIG_CTRL_IFACE_CLIENT_PREFIX "%d-%d",
+				  (int) getpid(), counter);
+	}
 	if (os_snprintf_error(sizeof(ctrl->local.sun_path), ret)) {
 		close(ctrl->s);
 		os_free(ctrl);

src/common/wpa_ctrl.h

@@ -316,6 +316,20 @@ enum wpa_vendor_elem_frame {
  */
 struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path);
 
+/**
+ * wpa_ctrl_open2 - Open a control interface to wpa_supplicant/hostapd
+ * @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
+ * @cli_path: Path for client UNIX domain sockets; ignored if UDP socket
+ *            is used.
+ * Returns: Pointer to abstract control interface data or %NULL on failure
+ *
+ * This function is used to open a control interface to wpa_supplicant/hostapd
+ * when the socket path for client need to be specified explicitly. Default
+ * ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd and client
+ * socket path is /tmp.
+ */
+struct wpa_ctrl * wpa_ctrl_open2(const char *ctrl_path, const char *cli_path);
+
 
 /**
  * wpa_ctrl_close - Close a control interface to wpa_supplicant/hostapd

wpa_supplicant/wpa_cli.c

@@ -76,6 +76,7 @@ static int wpa_cli_last_id = 0;
 #define CONFIG_CTRL_IFACE_DIR "/var/run/wpa_supplicant"
 #endif /* CONFIG_CTRL_IFACE_DIR */
 static const char *ctrl_iface_dir = CONFIG_CTRL_IFACE_DIR;
+static const char *client_socket_dir = NULL;
 static char *ctrl_ifname = NULL;
 static const char *pid_file = NULL;
 static const char *action_file = NULL;
@@ -107,7 +108,9 @@ static void usage(void)
 {
 	printf("wpa_cli [-p<path to ctrl sockets>] [-i<ifname>] [-hvB] "
 	       "[-a<action file>] \\\n"
-	       "        [-P<pid file>] [-g<global ctrl>] [-G<ping interval>]  "
+	       "        [-P<pid file>] [-g<global ctrl>] [-G<ping interval>] "
+	       "\\\n"
+	       "        [-s<wpa_client_socket_file_path>] "
 	       "[command..]\n"
 	       "  -h = help (show this usage text)\n"
 	       "  -v = shown version information\n"
@@ -330,6 +333,13 @@ static int wpa_cli_open_connection(const char *ifname, int attach)
 	}
 #endif /* ANDROID */
 
+	if (client_socket_dir && client_socket_dir[0] &&
+	    access(client_socket_dir, F_OK) < 0) {
+		perror(client_socket_dir);
+		os_free(cfile);
+		return -1;
+	}
+
 	if (cfile == NULL) {
 		flen = os_strlen(ctrl_iface_dir) + os_strlen(ifname) + 2;
 		cfile = os_malloc(flen);
@@ -343,14 +353,14 @@ static int wpa_cli_open_connection(const char *ifname, int attach)
 		}
 	}
 
-	ctrl_conn = wpa_ctrl_open(cfile);
+	ctrl_conn = wpa_ctrl_open2(cfile, client_socket_dir);
 	if (ctrl_conn == NULL) {
 		os_free(cfile);
 		return -1;
 	}
 
 	if (attach && interactive)
-		mon_conn = wpa_ctrl_open(cfile);
+		mon_conn = wpa_ctrl_open2(cfile, client_socket_dir);
 	else
 		mon_conn = NULL;
 	os_free(cfile);
@@ -4255,7 +4265,7 @@ int main(int argc, char *argv[])
 		return -1;
 
 	for (;;) {
-		c = getopt(argc, argv, "a:Bg:G:hi:p:P:v");
+		c = getopt(argc, argv, "a:Bg:G:hi:p:P:s:v");
 		if (c < 0)
 			break;
 		switch (c) {
@@ -4287,6 +4297,9 @@ int main(int argc, char *argv[])
 		case 'P':
 			pid_file = optarg;
 			break;
+		case 's':
+			client_socket_dir = optarg;
+			break;
 		default:
 			usage();
 			return -1;