[PATCH 09/12] net/pcap: report receive clock

Stephen Hemminger
2026-01-06T18:34:11Z

Since this drive supports receive timestamping, provide a callback
so that the application can determine the clock rate for timestamp.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
drivers/net/pcap/pcap_ethdev.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/net/pcap/pcap_ethdev.c b/drivers/net/pcap/pcap_ethdev.c
index e283fb3787..3eb313ebb8 100644
--- a/drivers/net/pcap/pcap_ethdev.c
+++ b/drivers/net/pcap/pcap_ethdev.c
@@ -1103,6 +1103,16 @@ eth_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
return 0;
}

+/* Timestamp values in receive packets from libpcap are in UTC */
+static int
+eth_rx_clock(struct rte_eth_dev *dev __rte_unused, uint64_t *timestamp)
+{
+ struct timespec cur_time;
+
+ timespec_get(&cur_time, TIME_UTC);
+ *timestamp = rte_timespec_to_ns(&cur_time);
+ return 0;
+}

static const struct eth_dev_ops ops = {
.dev_start = eth_dev_start,
@@ -1120,6 +1130,7 @@ static const struct eth_dev_ops ops = {
.mtu_set = eth_mtu_set,
.stats_get = eth_stats_get,
.stats_reset = eth_stats_reset,
+ .read_clock = eth_rx_clock,
};

static int
--
2.51.0