* 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

5 files changed, 211 insertions, 2 deletions

diff --git a/net/Makefile b/net/Makefile
index cf25a0f..7a70489 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= libnet.a
 
-OBJS	= net.o tftp.o bootp.o rarp.o eth.o nfs.o
+OBJS	= net.o tftp.o bootp.o rarp.o eth.o nfs.o sntp.o
 all:	$(LIB)
 
 $(LIB):	$(START) $(OBJS)
diff --git a/net/bootp.c b/net/bootp.c
index 4bca50d..ee0982e 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -448,6 +448,10 @@ static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t R
 	*e++  = 1;		/* Subnet Mask */
 	*cnt += 1;
 #endif
+#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_TIMEOFFSET)
+	*e++  = 2;
+	*cnt += 1;
+#endif
 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
 	*e++  = 3;		/* Router Option */
 	*cnt += 1;
@@ -472,6 +476,10 @@ static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t R
 	*e++  = 40;		/* NIS Domain name request */
 	*cnt += 1;
 #endif
+#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NTPSERVER)
+	*e++  = 42;
+	*cnt += 1;
+#endif
 	*e++  = 255;		/* End of the list */
 
 	/* Pad to minimal length */
@@ -718,6 +726,12 @@ static void DhcpOptionsProcess (uchar * popt)
 		case 1:
 			NetCopyIP (&NetOurSubnetMask, (popt + 2));
 			break;
+#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_TIMEOFFSET)
+		case 2:		/* Time offset	*/
+			NetCopyLong (&NetTimeOffset, (ulong *) (popt + 2));
+			NetTimeOffset = ntohl (NetTimeOffset);
+			break;
+#endif
 		case 3:
 			NetCopyIP (&NetOurGatewayIP, (popt + 2));
 			break;
@@ -741,6 +755,11 @@ static void DhcpOptionsProcess (uchar * popt)
 			memcpy (&NetOurRootPath, popt + 2, size);
 			NetOurRootPath[size] = 0;
 			break;
+#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NTPSERVER)
+		case 42:	/* NTP server IP */
+			NetCopyIP (&NetNtpServerIP, (popt + 2));
+			break;
+#endif
 		case 51:
 			NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2));
 			break;
diff --git a/net/net.c b/net/net.c
index d7523fd..11a286b 100644
--- a/net/net.c
+++ b/net/net.c
@@ -64,6 +64,13 @@
  *			  derived from our own IP address)
  *	We want:	- load the boot file
  *	Next step:	none
+ *
+ * SNTP:
+ *
+ *	Prerequisites:  - own ethernet address
+ *			- own IP address
+ *	We want:	- network time
+ *	Next step:	none
  */
 
 
@@ -79,6 +86,9 @@
 #include <status_led.h>
 #include <miiphy.h>
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+#include "sntp.h"
+#endif
 
 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 
@@ -148,6 +158,11 @@ static void PingStart(void);
 static void CDPStart(void);
 #endif
 
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+IPaddr_t	NetNtpServerIP;		/* NTP server IP address		*/
+int		NetTimeOffset=0;	/* offset time from UTC			*/
+#endif
+
 #ifdef CONFIG_NETCONSOLE
 void NcStart(void);
 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
@@ -313,6 +328,9 @@ restart:
 #if (CONFIG_COMMANDS & CFG_CMD_PING)
 	case PING:
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+	case SNTP:
+#endif
 	case NETCONS:
 	case TFTP:
 		NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
@@ -334,6 +352,11 @@ restart:
 			/* nothing */
 			break;
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+		case SNTP:
+			/* nothing */
+			break;
+#endif
 		default:
 			break;
 		}
@@ -417,6 +440,11 @@ restart:
 			NcStart();
 			break;
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+		case SNTP:
+			SntpStart();
+			break;
+#endif
 		default:
 			break;
 		}
@@ -1426,6 +1454,14 @@ static int net_check_prereq (proto_t protocol)
 		}
 		goto common;
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+	case SNTP:
+		if (NetNtpServerIP == 0) {
+			puts ("*** ERROR: NTP server address not given\n");
+			return (1);
+		}
+		goto common;
+#endif
 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
 	case NFS:
 #endif
@@ -1435,7 +1471,7 @@ static int net_check_prereq (proto_t protocol)
 			puts ("*** ERROR: `serverip' not set\n");
 			return (1);
 		}
-#if (CONFIG_COMMANDS & CFG_CMD_PING)
+#if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP))
 	      common:
 #endif
 
diff --git a/net/sntp.c b/net/sntp.c
new file mode 100644
index 0000000..9e11eb4
--- /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 */
diff --git a/net/sntp.h b/net/sntp.h
new file mode 100644
index 0000000..8a097bf
--- /dev/null
+++ b/net/sntp.h
@@ -0,0 +1,61 @@
+/*
+ * (C) Masami Komiya <mkomiya@sonare.it> 2005
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2, or (at
+ * your option) any later version.
+ */
+
+#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;
+};
+
+extern void	SntpStart (void);	/* Begin SNTP */
+
+#endif /* __SNTP_H__ */