xref: /openbmc/u-boot/net/sntp.c (revision 8c4445d2)
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(NetServerEther, NetNtpServerIP, 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
53 SntpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
54 	    unsigned len)
55 {
56 	struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
57 	struct rtc_time tm;
58 	ulong seconds;
59 
60 	debug("%s\n", __func__);
61 
62 	if (dest != SntpOurPort)
63 		return;
64 
65 	/*
66 	 * As the RTC's used in U-Boot sepport second resolution only
67 	 * we simply ignore the sub-second field.
68 	 */
69 	memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
70 
71 	to_tm(ntohl(seconds) - 2208988800UL + NetTimeOffset, &tm);
72 #if defined(CONFIG_CMD_DATE)
73 	rtc_set(&tm);
74 #endif
75 	printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
76 		tm.tm_year, tm.tm_mon, tm.tm_mday,
77 		tm.tm_hour, tm.tm_min, tm.tm_sec);
78 
79 	net_set_state(NETLOOP_SUCCESS);
80 }
81 
82 void
83 SntpStart(void)
84 {
85 	debug("%s\n", __func__);
86 
87 	NetSetTimeout(SNTP_TIMEOUT, SntpTimeout);
88 	net_set_udp_handler(SntpHandler);
89 	memset(NetServerEther, 0, sizeof(NetServerEther));
90 
91 	SntpSend();
92 }
93