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 sntp_our_port; 18 19 static void sntp_send(void) 20 { 21 struct sntp_pkt_t pkt; 22 int pktlen = SNTP_PACKET_LEN; 23 int sport; 24 25 debug("%s\n", __func__); 26 27 memset(&pkt, 0, sizeof(pkt)); 28 29 pkt.li = NTP_LI_NOLEAP; 30 pkt.vn = NTP_VERSION; 31 pkt.mode = NTP_MODE_CLIENT; 32 33 memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE, 34 (char *)&pkt, pktlen); 35 36 sntp_our_port = 10000 + (get_timer(0) % 4096); 37 sport = NTP_SERVICE_PORT; 38 39 net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport, 40 sntp_our_port, pktlen); 41 } 42 43 static void sntp_timeout_handler(void) 44 { 45 puts("Timeout\n"); 46 net_set_state(NETLOOP_FAIL); 47 return; 48 } 49 50 static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip, 51 unsigned src, unsigned len) 52 { 53 struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt; 54 struct rtc_time tm; 55 ulong seconds; 56 57 debug("%s\n", __func__); 58 59 if (dest != sntp_our_port) 60 return; 61 62 /* 63 * As the RTC's used in U-Boot sepport second resolution only 64 * we simply ignore the sub-second field. 65 */ 66 memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong)); 67 68 to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm); 69 #if defined(CONFIG_CMD_DATE) 70 rtc_set(&tm); 71 #endif 72 printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n", 73 tm.tm_year, tm.tm_mon, tm.tm_mday, 74 tm.tm_hour, tm.tm_min, tm.tm_sec); 75 76 net_set_state(NETLOOP_SUCCESS); 77 } 78 79 void sntp_start(void) 80 { 81 debug("%s\n", __func__); 82 83 net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler); 84 net_set_udp_handler(sntp_handler); 85 memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr)); 86 87 sntp_send(); 88 } 89