1 files changed, 88 insertions, 0 deletions
diff --git a/u-boot/net/sntp.c b/u-boot/net/sntp.c
new file mode 100644
index 0000000..76c10ec
--- /dev/null
+++ b/u-boot/net/sntp.c
@@ -0,0 +1,88 @@
+/*
+ * 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_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");
+	NetState = NETLOOP_FAIL;
+	return;
+}
+
+static void
+SntpHandler (uchar *pkt, unsigned dest, 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);
+
+	NetState = NETLOOP_SUCCESS;
+}
+
+void
+SntpStart (void)
+{
+	debug("%s\n", __func__);
+
+	NetSetTimeout (SNTP_TIMEOUT, SntpTimeout);
+	NetSetHandler(SntpHandler);
+	memset (NetServerEther, 0, 6);
+
+	SntpSend ();
+}