duplicheck: Include required headers for FreeBSD

Closes strongswan/strongswan#34.

diff --git a/src/libcharon/plugins/duplicheck/duplicheck.c b/src/libcharon/plugins/duplicheck/duplicheck.c
index 508e8e3..7c4cd5c 100644 (file)
--- a/src/libcharon/plugins/duplicheck/duplicheck.c
+++ b/src/libcharon/plugins/duplicheck/duplicheck.c
@@ -19,8 +19,10 @@
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdio.h>
+#include <string.h>
 #include <errno.h>
 #include <arpa/inet.h>
+#include <netinet/in.h>
 
 #include "duplicheck_msg.h"