packets: New IP header macros.

diff --git a/include/packets.h b/include/packets.h
index cd78295..fac8f41 100644 (file)
--- a/include/packets.h
+++ b/include/packets.h
@@ -164,10 +164,13 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
 
 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
+#define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
 
 #define IP_TYPE_TCP 6
 #define IP_TYPE_UDP 17
 
+#define IP_VERSION 4
+
 #define IP_HEADER_LEN 20
 struct ip_header {
     uint8_t ip_ihl_ver;