LXR uboot/net/sntp.c

   1/*
   2 * SNTP support driver
   3 *
   4 * Masami Komiya <mkomiya@sonare.it> 2005
   5 *
   6 */
   7
   8#include <common.h>
   9#include <command.h>
  10#include <net.h>
  11#include <rtc.h>
  12
  13#include "sntp.h"
  14
  15#if defined(CONFIG_CMD_NET) && defined(CONFIG_CMD_SNTP)
  16
  17#define SNTP_TIMEOUT 10
  18
  19static int SntpOurPort;
  20
  21static void
  22SntpSend (void)
  23{
  24        struct sntp_pkt_t pkt;
  25        int pktlen = SNTP_PACKET_LEN;
  26        int sport;
  27
  28        debug ("%s\n", __FUNCTION__);
  29
  30        memset (&pkt, 0, sizeof(pkt));
  31
  32        pkt.li = NTP_LI_NOLEAP;
  33        pkt.vn = NTP_VERSION;
  34        pkt.mode = NTP_MODE_CLIENT;
  35
  36        memcpy ((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char *)&pkt, pktlen);
  37
  38        SntpOurPort = 10000 + (get_timer(0) % 4096);
  39        sport = NTP_SERVICE_PORT;
  40
  41        NetSendUDPPacket (NetServerEther, NetNtpServerIP, sport, SntpOurPort, pktlen);
  42}
  43
  44static void
  45SntpTimeout (void)
  46{
  47        puts ("Timeout\n");
  48        NetState = NETLOOP_FAIL;
  49        return;
  50}
  51
  52static void
  53SntpHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
  54{
  55        struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
  56        struct rtc_time tm;
  57        ulong seconds;
  58
  59        debug ("%s\n", __FUNCTION__);
  60
  61        if (dest != SntpOurPort) return;
  62
  63        /*
  64         * As the RTC's used in U-Boot sepport second resolution only
  65         * we simply ignore the sub-second field.
  66         */
  67        memcpy (&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
  68
  69        to_tm(ntohl(seconds) - 2208988800UL + NetTimeOffset, &tm);
  70#if defined(CONFIG_CMD_DATE)
  71        rtc_set (&tm);
  72#endif
  73        printf ("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
  74                tm.tm_year, tm.tm_mon, tm.tm_mday,
  75                tm.tm_hour, tm.tm_min, tm.tm_sec);
  76
  77        NetState = NETLOOP_SUCCESS;
  78}
  79
  80void
  81SntpStart (void)
  82{
  83        debug ("%s\n", __FUNCTION__);
  84
  85        NetSetTimeout (SNTP_TIMEOUT * CFG_HZ, SntpTimeout);
  86        NetSetHandler(SntpHandler);
  87        memset (NetServerEther, 0, 6);
  88
  89        SntpSend ();
  90}
  91
  92#endif
  93