From 436011fee88fb1f8e2941c518e5f7bd11d66559d Mon Sep 17 00:00:00 2001
From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Date: Thu, 14 Jul 2016 15:49:58 -0400
Subject: Rewrite args parsing to prepare for libpcap.

---
 src/checksum.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/checksum.h')

diff --git a/src/checksum.h b/src/checksum.h
index 74fe69f..192d538 100644
--- a/src/checksum.h
+++ b/src/checksum.h
@@ -1,3 +1,6 @@
+#ifndef CHECKSUM_H
+#define CHECKSUM_H
+
 #include <stdint.h>
 
 struct sockaddr;
@@ -14,3 +17,5 @@ uint16_t csum_partial(const void *buff, int len, uint16_t wsum);
  * otherwise identical to csum_partial.
  */
 uint16_t csum_sockaddr_partial(const struct sockaddr *addr, int incl_port, uint16_t wsum);
+
+#endif
-- 
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