From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Mon, 29 Apr 2019 01:17:54 +0100
Subject: Initial import of qemu-2.4.1

---
 roms/u-boot/net/sntp.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 roms/u-boot/net/sntp.c

(limited to 'roms/u-boot/net/sntp.c')

diff --git a/roms/u-boot/net/sntp.c b/roms/u-boot/net/sntp.c
new file mode 100644
index 00000000..5de19526
--- /dev/null
+++ b/roms/u-boot/net/sntp.c
@@ -0,0 +1,92 @@
+/*
+ * SNTP support driver
+ *
+ * Masami Komiya <mkomiya@sonare.it> 2005
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <rtc.h>
+
+#include "sntp.h"
+
+#define SNTP_TIMEOUT 10000UL
+
+static int SntpOurPort;
+
+static void
+SntpSend(void)
+{
+	struct sntp_pkt_t pkt;
+	int pktlen = SNTP_PACKET_LEN;
+	int sport;
+
+	debug("%s\n", __func__);
+
+	memset(&pkt, 0, sizeof(pkt));
+
+	pkt.li = NTP_LI_NOLEAP;
+	pkt.vn = NTP_VERSION;
+	pkt.mode = NTP_MODE_CLIENT;
+
+	memcpy((char *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE,
+		(char *)&pkt, pktlen);
+
+	SntpOurPort = 10000 + (get_timer(0) % 4096);
+	sport = NTP_SERVICE_PORT;
+
+	NetSendUDPPacket(NetServerEther, NetNtpServerIP, sport, SntpOurPort,
+		pktlen);
+}
+
+static void
+SntpTimeout(void)
+{
+	puts("Timeout\n");
+	net_set_state(NETLOOP_FAIL);
+	return;
+}
+
+static void
+SntpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
+	    unsigned len)
+{
+	struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
+	struct rtc_time tm;
+	ulong seconds;
+
+	debug("%s\n", __func__);
+
+	if (dest != SntpOurPort)
+		return;
+
+	/*
+	 * As the RTC's used in U-Boot sepport second resolution only
+	 * we simply ignore the sub-second field.
+	 */
+	memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
+
+	to_tm(ntohl(seconds) - 2208988800UL + NetTimeOffset, &tm);
+#if defined(CONFIG_CMD_DATE)
+	rtc_set(&tm);
+#endif
+	printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
+		tm.tm_year, tm.tm_mon, tm.tm_mday,
+		tm.tm_hour, tm.tm_min, tm.tm_sec);
+
+	net_set_state(NETLOOP_SUCCESS);
+}
+
+void
+SntpStart(void)
+{
+	debug("%s\n", __func__);
+
+	NetSetTimeout(SNTP_TIMEOUT, SntpTimeout);
+	net_set_udp_handler(SntpHandler);
+	memset(NetServerEther, 0, sizeof(NetServerEther));
+
+	SntpSend();
+}
-- 
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