[PATCH 23.11] examples/ptpclient: fix message parsing

[Xueming Li]

Thanks, patch queued to 23.11.4 release staging

Regards,
Xueming
________________________________
From: Stephen Hemminger <stephen at networkplumber.org>
Sent: Thursday, February 20, 2025 1:16 AM
To: stable at dpdk.org <stable at dpdk.org>
Cc: Stephen Hemminger <stephen at networkplumber.org>
Subject: [PATCH 23.11] examples/ptpclient: fix message parsing

[ upstream commit 19630bd0d735badb06143086d4f1c50d726b7bad ]

Calling memcmp on same structure will always be true.
Replace with same conditional used elsewhere.

Link: https://pvs-studio.com/en/blog/posts/cpp/1183/

Fixes: ab129e9065a5 ("examples/ptpclient: add minimal PTP client")

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 examples/ptpclient/ptpclient.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
index cdf2da64df..92b54f240e 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -365,7 +365,7 @@ parse_sync(struct ptpv2_data_slave_ordinary *ptp_data, uint16_t rx_tstamp_idx)
                 ptp_data->ptpset = 1;
         }

-       if (memcmp(&ptp_hdr->source_port_id.clock_id,
+       if (memcmp(&ptp_hdr->master_clock_id,
                         &ptp_hdr->source_port_id.clock_id,
                         sizeof(struct clock_id)) == 0) {

--
2.47.2

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