[PATCH v2 1/1] net: fix inner L2 length for GRE and NVGRE

[Rakesh Kudurumalla]

Inner l2 length needs to be updated to include GRE and NVGRE
headers. Not updating this would cause failures for applications
which would be expecting l2_len field to be valid for
inner checksum offload cases.

Fixes: 76730c7b9b5a ("app/testpmd: use packet type parsing API")

Signed-off-by: Rakesh Kudurumalla <rkudurumalla at marvell.com>
---

V2: update innner l2 length based of GRE header flags
for key, sequence and checksum

 lib/net/rte_net.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/net/rte_net.c b/lib/net/rte_net.c
index c70b57fdc0..a24a0db526 100644
--- a/lib/net/rte_net.c
+++ b/lib/net/rte_net.c
@@ -480,6 +480,19 @@ uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
 			return pkt_type;
 
 		pkt_type |= ptype_tunnel_without_udp(&proto, m, &off);
+		if ((pkt_type & RTE_PTYPE_TUNNEL_MASK) == RTE_PTYPE_TUNNEL_GRE ||
+		    (pkt_type & RTE_PTYPE_TUNNEL_MASK) == RTE_PTYPE_TUNNEL_NVGRE) {
+			const struct rte_gre_hdr *gh;
+
+			gh = rte_pktmbuf_read(m, prev_off, sizeof(*gh), NULL);
+			if (gh->k)
+				hdr_lens->inner_l2_len += 4;
+			if (gh->s)
+				hdr_lens->inner_l2_len += 4;
+			if (gh->c)
+				hdr_lens->inner_l2_len += 4;
+			hdr_lens->inner_l2_len += sizeof(struct rte_gre_hdr);
+		}
 		hdr_lens->tunnel_len = off - prev_off;
 		hdr_lens->inner_l2_len = off - prev_off;
 	}
-- 
2.25.1