[PATCH v5 2/6] net: fix L2TPv2 common header

[Jie Wang]

The fields of L2TPv2 common header were reversed in big endian and
little endian.

This patch fixes this error to ensure L2TPv2 can be parsed correctly.

For L2TP reference:
https://datatracker.ietf.org/doc/html/rfc2661#section-3.1

Fixes: 3a929df1f286 ("ethdev: support L2TPv2 and PPP procotol")
Cc: stable at dpdk.org

Signed-off-by: Jie Wang <jie1x.wang at intel.com>
Acked-by: Ori Kam <orika at nvidia.com>
Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 lib/net/rte_l2tpv2.h | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/lib/net/rte_l2tpv2.h b/lib/net/rte_l2tpv2.h
index 938a993b48..1f3ad3f03c 100644
--- a/lib/net/rte_l2tpv2.h
+++ b/lib/net/rte_l2tpv2.h
@@ -89,16 +89,6 @@ struct rte_l2tpv2_common_hdr {
 		__extension__
 		struct {
 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
-			uint16_t t:1;		/**< message Type */
-			uint16_t l:1;		/**< length option bit */
-			uint16_t res1:2;	/**< reserved */
-			uint16_t s:1;		/**< ns/nr option bit */
-			uint16_t res2:1;	/**< reserved */
-			uint16_t o:1;		/**< offset option bit */
-			uint16_t p:1;		/**< priority option bit */
-			uint16_t res3:4;	/**< reserved */
-			uint16_t ver:4;		/**< protocol version */
-#elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
 			uint16_t ver:4;		/**< protocol version */
 			uint16_t res3:4;	/**< reserved */
 			uint16_t p:1;		/**< priority option bit */
@@ -108,6 +98,16 @@ struct rte_l2tpv2_common_hdr {
 			uint16_t res1:2;	/**< reserved */
 			uint16_t l:1;		/**< length option bit */
 			uint16_t t:1;		/**< message Type */
+#elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+			uint16_t t:1;		/**< message Type */
+			uint16_t l:1;		/**< length option bit */
+			uint16_t res1:2;	/**< reserved */
+			uint16_t s:1;		/**< ns/nr option bit */
+			uint16_t res2:1;	/**< reserved */
+			uint16_t o:1;		/**< offset option bit */
+			uint16_t p:1;		/**< priority option bit */
+			uint16_t res3:4;	/**< reserved */
+			uint16_t ver:4;		/**< protocol version */
 #endif
 		};
 	};
-- 
2.25.1