Added UIP_APPDATA_SIZE macro that holds the available buffer size for user data
diff --git a/contiki/uip/uip.h b/contiki/uip/uip.h
index d3e39ab..4bcdd41 100644
--- a/contiki/uip/uip.h
+++ b/contiki/uip/uip.h
@@ -45,7 +45,7 @@
*
* This file is part of the uIP TCP/IP stack.
*
- * $Id: uip.h,v 1.18 2005/02/27 09:52:43 adamdunkels Exp $
+ * $Id: uip.h,v 1.19 2005/03/09 10:21:04 adamdunkels Exp $
*
*/
@@ -1253,6 +1253,22 @@
#define UIP_TCPIP_HLEN 40
+/**
+ * The buffer size available for user data in the \ref uip_buf buffer.
+ *
+ * This macro holds the available size for user data in the \ref
+ * uip_buf buffer. The macro is intended to be used for checking
+ * bounds of available user data.
+ *
+ * Example:
+ \code
+ snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i);
+ \endcode
+ *
+ * \hideinitializer
+ */
+#define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
+
/* The TCP and IP headers. */
typedef struct {
/* IP header. */