net: define IPv4 IHL and VHL

Define IPv4 Minimum IHL and VHL according to rfc791 (see [1])

    "The Version field indicates the format of the
    internet header."

    "Internet Header Length (ihl) is the length of the
    internet header in 32 bit words, and thus points
    to the beginning of the data. Note that
    the minimum value for a correct header is 5."

[1] https://tools.ietf.org/html/rfc791

Signed-off-by: Saleh Alsouqi <salehals@mellanox.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index e69b863534fa0378c0989640e56c6b02cd119ecc..26b089ec123630aeeac29e05cc9184c2de2b5cd9 100644 (file)
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -16,7 +16,9 @@
  */
 
 #include <stdint.h>
+#include <sys/types.h>
 #include <netinet/in.h>
+#include <netinet/ip.h>
 
 #include <rte_byteorder.h>
 #include <rte_mbuf.h>
@@ -96,6 +98,10 @@ struct rte_ipv4_hdr {
        ((x) >= RTE_IPV4_MIN_MCAST && (x) <= RTE_IPV4_MAX_MCAST)
        /**< check if IPv4 address is multicast */
 
+/* IPv4 default fields values */
+#define RTE_IPV4_MIN_IHL    (0x5)
+#define RTE_IPV4_VHL_DEF    (IPVERSION | RTE_IPV4_MIN_IHL)
+
 /**
  * @internal Calculate a sum of all words in the buffer.
  * Helper routine for the rte_raw_cksum().