132 lines
2.4 KiB
C
132 lines
2.4 KiB
C
/*
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* SNTP support driver
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*
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* Masami Komiya <mkomiya@sonare.it> 2005
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <clock.h>
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#include <net.h>
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#include <rtc.h>
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#include "sntp.h"
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#define SNTP_TIMEOUT 10
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static int SntpOurPort;
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static void
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SntpSend (void)
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{
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struct sntp_pkt_t pkt;
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int pktlen = SNTP_PACKET_LEN;
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int sport;
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debug ("%s\n", __FUNCTION__);
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memset (&pkt, 0, sizeof(pkt));
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pkt.li = NTP_LI_NOLEAP;
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pkt.vn = NTP_VERSION;
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pkt.mode = NTP_MODE_CLIENT;
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memcpy ((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char *)&pkt, pktlen);
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SntpOurPort = 10000 + ((uint32_t)get_time_ns() % 4096);
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sport = NTP_SERVICE_PORT;
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NetSendUDPPacket (NetServerEther, NetNtpServerIP, sport, SntpOurPort, pktlen);
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}
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static void
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SntpTimeout (void)
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{
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puts ("Timeout\n");
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NetState = NETLOOP_FAIL;
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return;
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}
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static void
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SntpHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
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{
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struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
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struct rtc_time tm;
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ulong seconds;
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debug ("%s\n", __FUNCTION__);
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if (dest != SntpOurPort) return;
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/*
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* As the RTC's used in U-Boot sepport second resolution only
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* we simply ignore the sub-second field.
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*/
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memcpy (&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
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to_tm(ntohl(seconds) - 2208988800UL + NetTimeOffset, &tm);
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#if (CONFIG_COMMANDS & CFG_CMD_DATE)
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rtc_set (&tm);
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#endif
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printf ("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
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tm.tm_year, tm.tm_mon, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec);
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NetState = NETLOOP_SUCCESS;
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}
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void
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SntpStart (void)
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{
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debug ("%s\n", __FUNCTION__);
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NetSetTimeout (SNTP_TIMEOUT * SECOND, SntpTimeout);
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NetSetHandler(SntpHandler);
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memset (NetServerEther, 0, 6);
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SntpSend ();
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}
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int do_sntp (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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char *toff;
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if (argc < 2) {
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NetNtpServerIP = getenv_IPaddr ("ntpserverip");
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if (NetNtpServerIP == 0) {
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printf ("ntpserverip not set\n");
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return (1);
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}
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} else {
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NetNtpServerIP = string_to_ip(argv[1]);
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if (NetNtpServerIP == 0) {
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printf ("Bad NTP server IP address\n");
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return (1);
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}
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}
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toff = getenv ("timeoffset");
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if (toff == NULL) NetTimeOffset = 0;
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else NetTimeOffset = simple_strtol (toff, NULL, 10);
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if (NetLoopInit(SNTP) < 0)
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return 1;
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SntpStart();
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if (NetLoop() < 0) {
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printf("SNTP failed: host %s not responding\n", argv[1]);
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return 1;
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}
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return 0;
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}
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U_BOOT_CMD(
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sntp, 2, 1, do_sntp,
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"sntp\t- synchronize RTC via network\n",
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"[NTP server IP]\n"
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);
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