packets: Make Ethernet broadcast address available as a global object.

diff --git a/include/packets.h b/include/packets.h
index f1abcae181d7ebfbf7170a18f76a3db6dbac3e78..cd7829521bc70f4fae71e65ea4afdefdaf9ea6d6 100644 (file)
--- a/include/packets.h
+++ b/include/packets.h
@@ -35,11 +35,15 @@
 
 #include <stdint.h>
 #include <string.h>
+#include "compiler.h"
 #include "random.h"
 #include "util.h"
 
 #define ETH_ADDR_LEN           6
 
+static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] UNUSED
+    = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
 {
     return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;