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 #define SNTP_TIMEOUT 10000UL 16 17 static int SntpOurPort; 18 19 static void 20 SntpSend(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 *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE, 35 (char *)&pkt, pktlen); 36 37 SntpOurPort = 10000 + (get_timer(0) % 4096); 38 sport = NTP_SERVICE_PORT; 39 40 NetSendUDPPacket(net_server_ethaddr, net_ntp_server, sport, SntpOurPort, 41 pktlen); 42 } 43 44 static void 45 SntpTimeout(void) 46 { 47 puts("Timeout\n"); 48 net_set_state(NETLOOP_FAIL); 49 return; 50 } 51 52 static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip, 53 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", __func__); 60 61 if (dest != SntpOurPort) 62 return; 63 64 /* 65 * As the RTC's used in U-Boot sepport second resolution only 66 * we simply ignore the sub-second field. 67 */ 68 memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong)); 69 70 to_tm(ntohl(seconds) - 2208988800UL + NetTimeOffset, &tm); 71 #if defined(CONFIG_CMD_DATE) 72 rtc_set(&tm); 73 #endif 74 printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n", 75 tm.tm_year, tm.tm_mon, tm.tm_mday, 76 tm.tm_hour, tm.tm_min, tm.tm_sec); 77 78 net_set_state(NETLOOP_SUCCESS); 79 } 80 81 void 82 SntpStart(void) 83 { 84 debug("%s\n", __func__); 85 86 NetSetTimeout(SNTP_TIMEOUT, SntpTimeout); 87 net_set_udp_handler(sntp_handler); 88 memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr)); 89 90 SntpSend(); 91 } 92