From: Michael Qiu <qiudayu@chinac.com>
Date: Tue, 18 Oct 2016 05:49:06 +0000 (+0800)
Subject: examples/tep_term: fix L4 length
X-Git-Tag: spdx-start~5505
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=39f84786a23897596c42124c4416fc443bc9b688;p=dpdk.git

examples/tep_term: fix L4 length

l4_len is not fixed, althrough mostly it is a fixed value,
but when guest using iperf to do some tests, the l4_len
will have another 12 bytes optional fields.

Fixes: 2bb43bd4350a ("examples/tep_term: add TSO offload configuration")

Signed-off-by: Michael Qiu <qiudayu@chinac.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
---

diff --git a/examples/tep_termination/vxlan.c b/examples/tep_termination/vxlan.c
index 155415c873..109e93aa83 100644
--- a/examples/tep_termination/vxlan.c
+++ b/examples/tep_termination/vxlan.c
@@ -148,7 +148,7 @@ process_inner_cksums(struct ether_hdr *eth_hdr, union tunnel_offload_info *info)
 		if (tso_segsz != 0) {
 			ol_flags |= PKT_TX_TCP_SEG;
 			info->tso_segsz = tso_segsz;
-			info->l4_len = sizeof(struct tcp_hdr);
+			info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
 		}
 		ol_flags |= PKT_TX_TCP_CKSUM;
 		tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype, ol_flags);