* Patch by Masami Komiya, 30 Mar 2005:

  add SNTP support and expand time server and time offset fields of
  DHCP support. See doc/README.SNTP

* Patch by Steven Scholz, 13 Dec 2004:
  Fix bug in at91rm920 ethernet driver

1 files changed, 93 insertions, 0 deletions

diff --git a/net/sntp.c b/net/sntp.c
new file mode 100644
index 0000000000..9e11eb4962
--- /dev/null
+++ b/net/sntp.c
@@ -0,0 +1,93 @@
+/*
+ * SNTP support driver
+ *
+ * Masami Komiya <mkomiya@sonare.it> 2005
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <rtc.h>
+
+#include "sntp.h"
+
+#if ((CONFIG_COMMANDS & CFG_CMD_NET) && (CONFIG_COMMANDS & CFG_CMD_SNTP))
+
+#define SNTP_TIMEOUT 10
+
+static int SntpOurPort;
+
+static void
+SntpSend (void)
+{
+	struct sntp_pkt_t pkt;
+	int pktlen = SNTP_PACKET_LEN;
+	int sport;
+
+	debug ("%s\n", __FUNCTION__);
+
+	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 rpkt;
+	struct rtc_time tm;
+
+	debug ("%s\n", __FUNCTION__);
+
+	if (dest != SntpOurPort) return;
+
+	memcpy ((unsigned char *)&rpkt, pkt, len);
+
+#if (CONFIG_COMMANDS & CFG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
+to_tm(ntohl(rpkt.transmit_timestamp), &tm);
+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);
+	to_tm(ntohl(rpkt.transmit_timestamp) - 2208988800u + NetTimeOffset, &tm);
+#if (CONFIG_COMMANDS & CFG_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);
+#endif
+
+	NetState = NETLOOP_SUCCESS;
+}
+
+void
+SntpStart (void)
+{
+	debug ("%s\n", __FUNCTION__);
+
+	NetSetTimeout (SNTP_TIMEOUT * CFG_HZ, SntpTimeout);
+	NetSetHandler(SntpHandler);
+	memset (NetServerEther, 0, 6);
+
+	SntpSend ();
+}
+
+#endif /* CONFIG_COMMANDS & CFG_CMD_SNTP */