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-rw-r--r--sys/netinet/ip_input.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c
index 32a9ca1..ef1586d 100644
--- a/sys/netinet/ip_input.c
+++ b/sys/netinet/ip_input.c
@@ -85,6 +85,10 @@ __FBSDID("$FreeBSD$");
#include <security/mac/mac_framework.h>
+#ifdef CTASSERT
+CTASSERT(sizeof(struct ip) == 20);
+#endif
+
int rsvp_on = 0;
int ipforwarding = 0;
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