service: Add function to check the WPS PIN validity

diff --git a/src/service.c b/src/service.c
index 96dd0f9..88d7912 100644 (file)
--- a/src/service.c
+++ b/src/service.c
@@ -4277,6 +4277,26 @@ int __connman_service_add_passphrase(struct connman_service *service,
        return err;
 }
 
+static int check_wpspin(const char *wpspin)
+{
+       guint i;
+
+       if (wpspin == NULL)
+               return 0;
+
+       /* A WPS PIN is always 8 chars length,
+        * its content is in digit representation.
+        */
+       if (strlen(wpspin) != 8)
+               return -ENOKEY;
+
+       for (i = 0; i < 8; i++)
+               if (!isdigit((unsigned char) wpspin[i]))
+                       return -ENOKEY;
+
+       return 0;
+}
+
 static void request_input_cb (struct connman_service *service,
                        connman_bool_t values_received,
                        const char *name, int name_len,