From 61a6f5ab99197c8b1233de0ac9861bcae3d9df05 Mon Sep 17 00:00:00 2001 From: Jerome Forissier Date: Mon, 22 Sep 2025 11:35:43 +0200 Subject: [PATCH] net: lwip: dhcp: set ntpserverip environment variable Once the DHCP exchange is complete, if we have an IP address for an NTP server, set the ntpserverip environment variable accordingly. Although not necessary to make the sntp command use that server (since it is known internally to the lwIP stack), this makes the behavior in line with the legacy NET stack. This is also consistent with exporting the DNS servers etc. Signed-off-by: Jerome Forissier Suggested-by: Michal Simek --- net/lwip/dhcp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/lwip/dhcp.c b/net/lwip/dhcp.c index cbdfea3ba82..531bf2c6705 100644 --- a/net/lwip/dhcp.c +++ b/net/lwip/dhcp.c @@ -33,6 +33,7 @@ static int dhcp_loop(struct udevice *udev) char ipstr[] = "ipaddr\0\0"; char maskstr[] = "netmask\0\0"; char gwstr[] = "gatewayip\0\0"; + const ip_addr_t *ntpserverip; unsigned long start; struct netif *netif; struct dhcp *dhcp; @@ -110,6 +111,11 @@ static int dhcp_loop(struct udevice *udev) strncpy(boot_file_name, dhcp->boot_file_name, sizeof(boot_file_name)); #endif + if (CONFIG_IS_ENABLED(CMD_SNTP)) { + ntpserverip = sntp_getserver(1); + if (ntpserverip != IP_ADDR_ANY) + env_set("ntpserverip", ip4addr_ntoa(ntpserverip)); + } printf("DHCP client bound to address %pI4 (%lu ms)\n", &dhcp->offered_ip_addr, get_timer(start)); -- 2.47.3