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update example

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Sergio R. Caprile committed 2024-06-10 16:12:38 -03:00
1 parent 6cb1c3c0e9
commit 0897b0969d
4 files changed
+57 -40
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tutorials/udp/sntp-time-sync/main.c
+10 -3
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@@ -17,6 +17,7 @@ static struct mg_connection *s_sntp_conn = NULL;
// On embedded systems, rename to time()
time_t my_time(time_t *tp) {
// you can just return mg_now() / 1000;
time_t t = s_boot_timestamp + mg_millis() / 1000;
if (tp != NULL) *tp = t;
return t;
@@ -25,9 +26,15 @@ time_t my_time(time_t *tp) {
// SNTP client callback
static void sfn(struct mg_connection *c, int ev, void *ev_data) {
if (ev == MG_EV_SNTP_TIME) {
int64_t t = *(int64_t *) ev_data;
MG_INFO(("Got SNTP time: %lld ms from epoch", t));
s_boot_timestamp = (time_t) ((t - mg_millis()) / 1000);
// Time received, the internal protocol handler updates what mg_now() returns
uint64_t curtime = mg_now();
MG_INFO(("SNTP-updated current time is: %llu ms from epoch", curtime));
// otherwise, you can process the server returned data yourself
{
uint64_t t = *(uint64_t *) ev_data;
s_boot_timestamp = (time_t) ((t - mg_millis()) / 1000);
MG_INFO(("Got SNTP time: %llu ms from epoch, ", t));
}
} else if (ev == MG_EV_CLOSE) {
s_sntp_conn = NULL;
}