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-rw-r--r--src/interface.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/interface.h b/src/interface.h
index d223b1f..8d6ea78 100644
--- a/src/interface.h
+++ b/src/interface.h
@@ -21,6 +21,9 @@
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
+/* From <linux/if_ether.h> */
+#define ETH_ALEN 6
+
int interface_auto_up;
int interface_do_message;