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/*
* 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_UDP_HDR_SIZE,
(char *)&pkt, pktlen);
SntpOurPort = 10000 + (get_timer(0) % 4096);
sport = NTP_SERVICE_PORT;
NetSendUDPPacket(NetServerEther, net_ntp_server, sport, SntpOurPort,
pktlen);
}
static void
SntpTimeout(void)
{
puts("Timeout\n");
net_set_state(NETLOOP_FAIL);
return;
}
static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
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);
net_set_state(NETLOOP_SUCCESS);
}
void
SntpStart(void)
{
debug("%s\n", __func__);
NetSetTimeout(SNTP_TIMEOUT, SntpTimeout);
net_set_udp_handler(sntp_handler);
memset(NetServerEther, 0, sizeof(NetServerEther));
SntpSend();
}
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