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/*
* SNTP support driver
*
* Masami Komiya <mkomiya@sonare.it> 2005
*
*/
#include <common.h>
#include <command.h>
#include <clock.h>
#include <net.h>
#include <rtc.h>
#include "sntp.h"
#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 + ((uint32_t)get_time_ns() % 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)
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 * SECOND, SntpTimeout);
NetSetHandler(SntpHandler);
memset (NetServerEther, 0, 6);
SntpSend ();
}
int do_sntp (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
char *toff;
if (argc < 2) {
NetNtpServerIP = getenv_IPaddr ("ntpserverip");
if (NetNtpServerIP == 0) {
printf ("ntpserverip not set\n");
return (1);
}
} else {
NetNtpServerIP = string_to_ip(argv[1]);
if (NetNtpServerIP == 0) {
printf ("Bad NTP server IP address\n");
return (1);
}
}
toff = getenv ("timeoffset");
if (toff == NULL) NetTimeOffset = 0;
else NetTimeOffset = simple_strtol (toff, NULL, 10);
if (NetLoop(SNTP) < 0) {
printf("SNTP failed: host %s not responding\n", argv[1]);
return 1;
}
return 0;
}
U_BOOT_CMD(
sntp, 2, 1, do_sntp,
"sntp\t- synchronize RTC via network\n",
"[NTP server IP]\n"
);
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