print-ip6: add a test on the header version value

1 files changed, 1 insertions, 0 deletions

diff --git a/ip6.h b/ip6.h
index 12c87ad2..2ac7af65 100644
--- a/ip6.h
+++ b/ip6.h
@@ -89,6 +89,7 @@ struct ip6_hdr {
 } UNALIGNED;
 
 #define ip6_vfc		ip6_ctlun.ip6_un2_vfc
+#define IP6_VERSION(ip6_hdr)	(((ip6_hdr)->ip6_vfc & 0xf0) >> 4)
 #define ip6_flow	ip6_ctlun.ip6_un1.ip6_un1_flow
 #define ip6_plen	ip6_ctlun.ip6_un1.ip6_un1_plen
 #define ip6_nxt		ip6_ctlun.ip6_un1.ip6_un1_nxt