summaryrefslogtreecommitdiffstats
path: root/net/sntp.c
blob: 4e38d4153bdc5e31880245869c4c59b9f28dc9d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
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) || defined(CONFIG_CMD_NET)) \
    && ((CONFIG_COMMANDS & CFG_CMD_SNTP)) || defined(CONFIG_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 *rpktp = (struct sntp_pkt_t *)pkt;
	struct rtc_time tm;
	ulong seconds;

	debug ("%s\n", __FUNCTION__);

	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 (CONFIG_COMMANDS & CFG_CMD_DATE) || 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", __FUNCTION__);

	NetSetTimeout (SNTP_TIMEOUT * CFG_HZ, SntpTimeout);
	NetSetHandler(SntpHandler);
	memset (NetServerEther, 0, 6);

	SntpSend ();
}

#endif /* CONFIG_COMMANDS & CFG_CMD_SNTP */