DPDK IPv6 header definition combined the `version`, `traffic class`
and `flow label` header fields into a single 32 bits structure member
`vtc_flow`.
The patch expands IPv6 header definition with dedicated structure
members for the `version`, `traffic class` and `flow label` fields.
The `traffic class` is also separated into DS and ECN fields.
The patch also preserves existing `vtc_flow` structure member for
backward compatibility.
Signed-off-by: Gregory Etelson <getel...@nvidia.com>
---
v2:
Replace uint32_t with rte_be32_t.
Split traffic_class into DS and ECN bits.
v3:
Define both traffic_class and DS + ECN fields.
---
lib/net/rte_ip.h | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/lib/net/rte_ip.h b/lib/net/rte_ip.h
index 0d103d4127..3adfcbc431 100644
--- a/lib/net/rte_ip.h
+++ b/lib/net/rte_ip.h
@@ -524,7 +524,33 @@ rte_ipv4_udptcp_cksum_mbuf_verify(const struct rte_mbuf *m,
* IPv6 Header
*/
struct rte_ipv6_hdr {
- rte_be32_t vtc_flow; /**< IP version, traffic class & flow label. */
+ union {
+ rte_be32_t vtc_flow; /**< IP version, traffic class &
flow label. */
+ __extension__
+ struct {
+#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
+ rte_be32_t flow_label:20; /**< flow label */
+ union {
+ rte_be32_t tc:8;
+ struct {
+ rte_be32_t ecn:2; /**< ECN */
+ rte_be32_t ds:6; /**< differentiated
services */
+ };
+ };
+ rte_be32_t version:4; /**< version */
+#elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+ rte_be32_t version:4; /**< version */
+ union {
+ rte_be32_t tc:8;
+ struct {
+ rte_be32_t ds:6; /**< differentiated
services */
+ rte_be32_t ecn:2; /**< ECN */
+ };
+ };
+ rte_be32_t flow_label:20; /**< flow label */
+#endif
+ };
+ };
rte_be16_t payload_len; /**< IP payload size, including ext. headers */
uint8_t proto; /**< Protocol, next header. */
uint8_t hop_limits; /**< Hop limits. */
--
2.43.0
