treewide: Add include guards

...at the moment, just for consistency with packet.h, icmp.h,
tcp.h and udp.h.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tap.h b/tap.h
index 8942fcf..233497e 100644
--- a/tap.h
+++ b/tap.h
@@ -3,8 +3,13 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef TAP_H
+#define TAP_H
+
 void tap_ip_send(struct ctx *c, struct in6_addr *src, uint8_t proto,
 		 char *in, size_t len, uint32_t flow);
 int tap_send(struct ctx *c, void *data, size_t len, int vnet_pre);
 void tap_handler(struct ctx *c, int fd, uint32_t events, struct timespec *now);
 void tap_sock_init(struct ctx *c);
+
+#endif /* TAP_H */