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 <dm.h>
  11 #include <net.h>
  12 #include <rtc.h>
  13
  14 #include "sntp.h"
  15
  16 #define SNTP_TIMEOUT 10000UL
  17
  18 static int sntp_our_port;
  19
  20 static void sntp_send(void)
  21 {
  22         struct sntp_pkt_t pkt;
  23         int pktlen = SNTP_PACKET_LEN;
  24         int sport;
  25
  26         debug("%s\n", __func__);
  27
  28         memset(&pkt, 0, sizeof(pkt));
  29
  30         pkt.li = NTP_LI_NOLEAP;
  31         pkt.vn = NTP_VERSION;
  32         pkt.mode = NTP_MODE_CLIENT;
  33
  34         memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE,
  35                (char *)&pkt, pktlen);
  36
  37         sntp_our_port = 10000 + (get_timer(0) % 4096);
  38         sport = NTP_SERVICE_PORT;
  39
  40         net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport,
  41                             sntp_our_port, pktlen);
  42 }
  43
  44 static void sntp_timeout_handler(void)
  45 {
  46         puts("Timeout\n");
  47         net_set_state(NETLOOP_FAIL);
  48         return;
  49 }
  50
  51 static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
  52                          unsigned src, unsigned len)
  53 {
  54 #ifdef CONFIG_TIMESTAMP
  55         struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
  56         struct rtc_time tm;
  57         ulong seconds;
  58 #endif
  59
  60         debug("%s\n", __func__);
  61
  62         if (dest != sntp_our_port)
  63                 return;
  64
  65 #ifdef CONFIG_TIMESTAMP
  66         /*
  67          * As the RTC's used in U-Boot support second resolution only
  68          * we simply ignore the sub-second field.
  69          */
  70         memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
  71
  72         rtc_to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm);
  73 #if defined(CONFIG_CMD_DATE)
  74 #  ifdef CONFIG_DM_RTC
  75         struct udevice *dev;
  76         int ret;
  77
  78         ret = uclass_get_device(UCLASS_RTC, 0, &dev);
  79         if (ret)
  80                 printf("SNTP: cannot find RTC: err=%d\n", ret);
  81         else
  82                 dm_rtc_set(dev, &tm);
  83 #  else
  84         rtc_set(&tm);
  85 #  endif
  86 #endif
  87         printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
  88                tm.tm_year, tm.tm_mon, tm.tm_mday,
  89                tm.tm_hour, tm.tm_min, tm.tm_sec);
  90 #endif
  91
  92         net_set_state(NETLOOP_SUCCESS);
  93 }
  94
  95 void sntp_start(void)
  96 {
  97         debug("%s\n", __func__);
  98
  99         net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler);
 100         net_set_udp_handler(sntp_handler);
 101         memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
 102
 103         sntp_send();
 104 }