From 23a60e62707725c79ccb0e724839562577994261 Mon Sep 17 00:00:00 2001
From: Oleg Hahm <oleg@hobbykeller.org>
Date: Tue, 18 Aug 2015 19:31:49 +0200
Subject: [PATCH] universal_address: determine biggest address size
---
sys/include/universal_address.h | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/sys/include/universal_address.h b/sys/include/universal_address.h
index a7be5337b8..86525f4aad 100644
--- a/sys/include/universal_address.h
+++ b/sys/include/universal_address.h
@@ -29,7 +29,18 @@ extern "C" {
#include <stdlib.h>
#include "net/ipv6/addr.h"
-#define UNIVERSAL_ADDRESS_SIZE (16) /**< size of the used addresses in bytes */
+/** @brief size of the used addresses in bytes */
+/* determine the widest possible address type */
+#ifndef UNIVERSAL_ADDRESS_SIZE
+#define UNIVERSAL_ADDRESS_SIZE (0) /* rather senseless default, should
+ trigger warnings */
+#endif
+
+/* IPv6 address has 128 bit -> 16 bytes */
+#if defined(MODULE_IPV6_ADDR) && ((IPV6_ADDR_BIT_LEN >> 3) > UNIVERSAL_ADDRESS_SIZE)
+#undef UNIVERSAL_ADDRESS_SIZE
+#define UNIVERSAL_ADDRESS_SIZE (IPV6_ADDR_BIT_LEN >> 3)
+#endif
/**
* @brief The container descriptor used to identify a universal address entry
--
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