WPS: Add support for external Registrars using UPnP transport

[mech_eap.git] / src / utils / wpabuf.c

diff --git a/src/utils/wpabuf.c b/src/utils/wpabuf.c
index e809690..c544179 100644 (file)
--- a/src/utils/wpabuf.c
+++ b/src/utils/wpabuf.c
@@ -1,6 +1,6 @@
 /*
  * Dynamic data buffer
- * Copyright (c) 2007-2008, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -195,3 +195,18 @@ struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len)
 
        return ret;
 }
+
+
+void wpabuf_printf(struct wpabuf *buf, char *fmt, ...)
+{
+       va_list ap;
+       void *tmp = wpabuf_mhead_u8(buf) + wpabuf_len(buf);
+       int res;
+
+       va_start(ap, fmt);
+       res = vsnprintf(tmp, buf->size - buf->used, fmt, ap);
+       va_end(ap);
+       if (res < 0 || (size_t) res >= buf->size - buf->used)
+               wpabuf_overflow(buf, res);
+       buf->used += res;
+}