diff --git a/cmd/Kconfig b/cmd/Kconfig
index 0761dbb..169c16a 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1633,6 +1633,7 @@ config CMD_CDP
 
 config CMD_SNTP
 	bool "sntp"
+	select PROT_UDP
 	help
 	  Synchronize RTC via network
 
diff --git a/cmd/net.c b/cmd/net.c
index 9bbcdbc..beb2877 100644
--- a/cmd/net.c
+++ b/cmd/net.c
@@ -13,6 +13,8 @@
 #include <env.h>
 #include <image.h>
 #include <net.h>
+#include <net/udp.h>
+#include <net/sntp.h>
 
 static int netboot_common(enum proto_t, struct cmd_tbl *, int, char * const []);
 
@@ -356,6 +358,12 @@ U_BOOT_CMD(
 #endif
 
 #if defined(CONFIG_CMD_SNTP)
+static struct udp_ops sntp_ops = {
+	.prereq = sntp_prereq,
+	.start = sntp_start,
+	.data = NULL,
+};
+
 int do_sntp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	char *toff;
@@ -380,7 +388,7 @@ int do_sntp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	else
 		net_ntp_time_offset = simple_strtol(toff, NULL, 10);
 
-	if (net_loop(SNTP) < 0) {
+	if (udp_loop(&sntp_ops) < 0) {
 		printf("SNTP failed: host %pI4 not responding\n",
 		       &net_ntp_server);
 		return CMD_RET_FAILURE;
diff --git a/include/net/sntp.h b/include/net/sntp.h
new file mode 100644
index 0000000..30b44d1
--- /dev/null
+++ b/include/net/sntp.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Masami Komiya <mkomiya@sonare.it> 2005
+ */
+
+#ifndef __SNTP_H__
+#define __SNTP_H__
+
+#define NTP_SERVICE_PORT	123
+#define SNTP_PACKET_LEN		48
+
+
+/* Leap Indicator */
+#define NTP_LI_NOLEAP		0x0
+#define NTP_LI_61SECS		0x1
+#define NTP_LI_59SECS		0x2
+#define NTP_LI_ALARM		0x3
+
+/* Version */
+
+#define NTP_VERSION		4
+
+/* Mode */
+#define NTP_MODE_RESERVED	0
+#define NTP_MODE_SYMACTIVE	1	/* Symmetric Active */
+#define NTP_MODE_SYMPASSIVE	2	/* Symmetric Passive */
+#define NTP_MODE_CLIENT		3
+#define NTP_MODE_SERVER		4
+#define NTP_MODE_BROADCAST	5
+#define NTP_MODE_NTPCTRL	6	/* Reserved for NTP control message */
+#define NTP_MODE_PRIVATE	7	/* Reserved for private use */
+
+struct sntp_pkt_t {
+#if __LITTLE_ENDIAN
+	uchar mode:3;
+	uchar vn:3;
+	uchar li:2;
+#else
+	uchar li:2;
+	uchar vn:3;
+	uchar mode:3;
+#endif
+	uchar stratum;
+	uchar poll;
+	uchar precision;
+	uint root_delay;
+	uint root_dispersion;
+	uint reference_id;
+	unsigned long long reference_timestamp;
+	unsigned long long originate_timestamp;
+	unsigned long long receive_timestamp;
+	unsigned long long transmit_timestamp;
+} __attribute__((packed));
+
+int sntp_prereq(void *data);
+int sntp_start(void *data);	/* Begin SNTP */
+
+#endif /* __SNTP_H__ */
diff --git a/net/net.c b/net/net.c
index 1ce0eb5..197fde3 100644
--- a/net/net.c
+++ b/net/net.c
@@ -72,12 +72,6 @@
  *	We want:	- load the boot file
  *	Next step:	none
  *
- * SNTP:
- *
- *	Prerequisites:	- own ethernet address
- *			- own IP address
- *	We want:	- network time
- *	Next step:	none
  *
  * WOL:
  *
@@ -119,9 +113,6 @@
 #include "nfs.h"
 #include "ping.h"
 #include "rarp.h"
-#if defined(CONFIG_CMD_SNTP)
-#include "sntp.h"
-#endif
 #if defined(CONFIG_CMD_WOL)
 #include "wol.h"
 #endif
@@ -185,13 +176,6 @@ u32 net_boot_file_size;
 /* Boot file size in blocks as reported by the DHCP server */
 u32 net_boot_file_expected_size_in_blocks;
 
-#if defined(CONFIG_CMD_SNTP)
-/* NTP server IP address */
-struct in_addr	net_ntp_server;
-/* offset time from UTC */
-int		net_ntp_time_offset;
-#endif
-
 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
 /* Receive packets */
 uchar *net_rx_packets[PKTBUFSRX];
@@ -521,11 +505,6 @@ restart:
 			nc_start();
 			break;
 #endif
-#if defined(CONFIG_CMD_SNTP)
-		case SNTP:
-			sntp_start();
-			break;
-#endif
 #if defined(CONFIG_CMD_DNS)
 		case DNS:
 			dns_start();
@@ -1352,14 +1331,6 @@ static int net_check_prereq(enum proto_t protocol)
 		}
 		goto common;
 #endif
-#if defined(CONFIG_CMD_SNTP)
-	case SNTP:
-		if (net_ntp_server.s_addr == 0) {
-			puts("*** ERROR: NTP server address not given\n");
-			return 1;
-		}
-		goto common;
-#endif
 #if defined(CONFIG_CMD_DNS)
 	case DNS:
 		if (net_dns_server.s_addr == 0) {
@@ -1385,7 +1356,7 @@ static int net_check_prereq(enum proto_t protocol)
 			puts("*** ERROR: `serverip' not set\n");
 			return 1;
 		}
-#if	defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
+#if	defined(CONFIG_CMD_PING) || \
 	defined(CONFIG_CMD_DNS) || defined(CONFIG_PROT_UDP)
 common:
 #endif
diff --git a/net/sntp.c b/net/sntp.c
index 39d7664..d5d5671 100644
--- a/net/sntp.c
+++ b/net/sntp.c
@@ -12,12 +12,17 @@
 #include <net.h>
 #include <rtc.h>
 
-#include "sntp.h"
+#include <net/sntp.h>
 
 #define SNTP_TIMEOUT 10000UL
 
 static int sntp_our_port;
 
+/* NTP server IP address */
+struct in_addr	net_ntp_server;
+/* offset time from UTC */
+int		net_ntp_time_offset;
+
 static void sntp_send(void)
 {
 	struct sntp_pkt_t pkt;
@@ -93,7 +98,25 @@ static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 	net_set_state(NETLOOP_SUCCESS);
 }
 
-void sntp_start(void)
+/*
+ * SNTP:
+ *
+ *	Prerequisites:	- own ethernet address
+ *			- own IP address
+ *	We want:	- network time
+ *	Next step:	none
+ */
+int sntp_prereq(void *data)
+{
+	if (net_ntp_server.s_addr == 0) {
+		puts("*** ERROR: NTP server address not given\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+int sntp_start(void *data)
 {
 	debug("%s\n", __func__);
 
@@ -102,4 +125,6 @@ void sntp_start(void)
 	memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
 
 	sntp_send();
+
+	return 0;
 }
diff --git a/net/sntp.h b/net/sntp.h
deleted file mode 100644
index d3cbfbc..0000000
--- a/net/sntp.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * (C) Masami Komiya <mkomiya@sonare.it> 2005
- */
-
-#ifndef __SNTP_H__
-#define __SNTP_H__
-
-#define NTP_SERVICE_PORT	123
-#define SNTP_PACKET_LEN		48
-
-
-/* Leap Indicator */
-#define NTP_LI_NOLEAP		0x0
-#define NTP_LI_61SECS		0x1
-#define NTP_LI_59SECS		0x2
-#define NTP_LI_ALARM		0x3
-
-/* Version */
-
-#define NTP_VERSION		4
-
-/* Mode */
-#define NTP_MODE_RESERVED	0
-#define NTP_MODE_SYMACTIVE	1	/* Symmetric Active */
-#define NTP_MODE_SYMPASSIVE	2	/* Symmetric Passive */
-#define NTP_MODE_CLIENT		3
-#define NTP_MODE_SERVER		4
-#define NTP_MODE_BROADCAST	5
-#define NTP_MODE_NTPCTRL	6	/* Reserved for NTP control message */
-#define NTP_MODE_PRIVATE	7	/* Reserved for private use */
-
-struct sntp_pkt_t {
-#if __LITTLE_ENDIAN
-	uchar mode:3;
-	uchar vn:3;
-	uchar li:2;
-#else
-	uchar li:2;
-	uchar vn:3;
-	uchar mode:3;
-#endif
-	uchar stratum;
-	uchar poll;
-	uchar precision;
-	uint root_delay;
-	uint root_dispersion;
-	uint reference_id;
-	unsigned long long reference_timestamp;
-	unsigned long long originate_timestamp;
-	unsigned long long receive_timestamp;
-	unsigned long long transmit_timestamp;
-} __attribute__((packed));
-
-void sntp_start(void);	/* Begin SNTP */
-
-#endif /* __SNTP_H__ */
