X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/bfe9582ec625704c427b441dfa3a57d7a99604b8..b51a0dafc7861eb31d21524ec067d7c529a664b8:/ip.h

diff --git a/ip.h b/ip.h
index 8179061e..ca87548f 100644
--- a/ip.h
+++ b/ip.h
@@ -51,13 +51,13 @@
  */
 struct ip {
 	nd_uint8_t	ip_vhl;		/* header length, version */
-#define IP_V(ip)	(((ip)->ip_vhl & 0xf0) >> 4)
-#define IP_HL(ip)	((ip)->ip_vhl & 0x0f)
+#define IP_V(ip)	((GET_U_1((ip)->ip_vhl) & 0xf0) >> 4)
+#define IP_HL(ip)	(GET_U_1((ip)->ip_vhl) & 0x0f)
 	nd_uint8_t	ip_tos;		/* type of service */
 	nd_uint16_t	ip_len;		/* total length */
 	nd_uint16_t	ip_id;		/* identification */
 	nd_uint16_t	ip_off;		/* fragment offset field */
-#define	IP_DF 0x4000			/* dont fragment flag */
+#define	IP_DF 0x4000			/* don't fragment flag */
 #define	IP_MF 0x2000			/* more fragments flag */
 #define	IP_OFFMASK 0x1fff		/* mask for fragmenting bits */
 	nd_uint8_t	ip_ttl;		/* time to live */