sntp.c 2.4 KB

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  1. /*
  2. * SNTP support driver
  3. *
  4. * Masami Komiya <mkomiya@sonare.it> 2005
  5. *
  6. */
  7. #include <common.h>
  8. #include <command.h>
  9. #include <dm.h>
  10. #include <log.h>
  11. #include <net.h>
  12. #include <rtc.h>
  13. #include <net/sntp.h>
  14. #define SNTP_TIMEOUT 10000UL
  15. static int sntp_our_port;
  16. /* NTP server IP address */
  17. struct in_addr net_ntp_server;
  18. /* offset time from UTC */
  19. int net_ntp_time_offset;
  20. static void sntp_send(void)
  21. {
  22. struct sntp_pkt_t pkt;
  23. int pktlen = SNTP_PACKET_LEN;
  24. int sport;
  25. debug("%s\n", __func__);
  26. memset(&pkt, 0, sizeof(pkt));
  27. pkt.li = NTP_LI_NOLEAP;
  28. pkt.vn = NTP_VERSION;
  29. pkt.mode = NTP_MODE_CLIENT;
  30. memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE,
  31. (char *)&pkt, pktlen);
  32. sntp_our_port = 10000 + (get_timer(0) % 4096);
  33. sport = NTP_SERVICE_PORT;
  34. net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport,
  35. sntp_our_port, pktlen);
  36. }
  37. static void sntp_timeout_handler(void)
  38. {
  39. puts("Timeout\n");
  40. net_set_state(NETLOOP_FAIL);
  41. return;
  42. }
  43. static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
  44. unsigned src, unsigned len)
  45. {
  46. struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
  47. struct rtc_time tm;
  48. ulong seconds;
  49. debug("%s\n", __func__);
  50. if (dest != sntp_our_port)
  51. return;
  52. /*
  53. * As the RTC's used in U-Boot support second resolution only
  54. * we simply ignore the sub-second field.
  55. */
  56. memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
  57. rtc_to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm);
  58. #ifdef CONFIG_DM_RTC
  59. struct udevice *dev;
  60. int ret;
  61. ret = uclass_get_device(UCLASS_RTC, 0, &dev);
  62. if (ret)
  63. printf("SNTP: cannot find RTC: err=%d\n", ret);
  64. else
  65. dm_rtc_set(dev, &tm);
  66. #elif defined(CONFIG_CMD_DATE)
  67. rtc_set(&tm);
  68. #endif
  69. printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
  70. tm.tm_year, tm.tm_mon, tm.tm_mday,
  71. tm.tm_hour, tm.tm_min, tm.tm_sec);
  72. net_set_state(NETLOOP_SUCCESS);
  73. }
  74. /*
  75. * SNTP:
  76. *
  77. * Prerequisites: - own ethernet address
  78. * - own IP address
  79. * We want: - network time
  80. * Next step: none
  81. */
  82. int sntp_prereq(void *data)
  83. {
  84. if (net_ntp_server.s_addr == 0) {
  85. puts("*** ERROR: NTP server address not given\n");
  86. return 1;
  87. }
  88. return 0;
  89. }
  90. int sntp_start(void *data)
  91. {
  92. debug("%s\n", __func__);
  93. net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler);
  94. net_set_udp_handler(sntp_handler);
  95. memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
  96. sntp_send();
  97. return 0;
  98. }