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Fix #1600 - more precise SNTP time calculation

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cpq committed 2022-08-09 12:13:23 +01:00
1 parent 2279a51d52
commit b7406357c5
3 files changed
+49 -42
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test/unit_test.c
+9 -30
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@@ -299,7 +299,7 @@ static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
int64_t ms = (int64_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
int64_t diff = ms > received ? ms - received : received - ms;
MG_DEBUG(("diff: %lld", diff));
// ASSERT(diff < 100); // The diff should be less than 300 ms
ASSERT(diff < 100);
#endif
} else if (ev == MG_EV_OPEN) {
c->is_hexdumping = 1;
@@ -324,39 +324,18 @@ static void test_sntp_server(const char *url) {
}
static void test_sntp(void) {
const unsigned char bad[] =
"\x55\x02\x00\xeb\x00\x00\x00\x1e\x00\x00\x07\xb6\x3e\xc9\xd6\xa2"
"\xdb\xde\xea\x30\x91\x86\xb7\x10\xdb\xde\xed\x98\x00\x00\x00\xde"
"\xdb\xde\xed\x99\x0a\xe2\xc7\x96\xdb\xde\xed\x99\x0a\xe4\x6b\xda";
ASSERT(mg_sntp_parse(bad, sizeof(bad)) < 0);
ASSERT(mg_sntp_parse(NULL, 0) == -1);
test_sntp_server("udp://time.windows.com:123");
// NOTE(cpq): temporarily disabled until Github Actions fix their NTP
// port blockage issue, https://github.com/actions/runner-images/issues/5615
// test_sntp_server("udp://time.apple.com:123");
// test_sntp_server(NULL);
{
int64_t ms;
const unsigned char sntp_good[] =
"\x24\x02\x00\xeb\x00\x00\x00\x1e\x00\x00\x07\xb6\x3e"
"\xc9\xd6\xa2\xdb\xde\xea\x30\x91\x86\xb7\x10\xdb\xde"
"\xed\x98\x00\x00\x00\xde\xdb\xde\xed\x99\x0a\xe2\xc7"
"\x96\xdb\xde\xed\x99\x0a\xe4\x6b\xda";
const unsigned char bad_good[] =
"\x55\x02\x00\xeb\x00\x00\x00\x1e\x00\x00\x07\xb6\x3e"
"\xc9\xd6\xa2\xdb\xde\xea\x30\x91\x86\xb7\x10\xdb\xde"
"\xed\x98\x00\x00\x00\xde\xdb\xde\xed\x99\x0a\xe2\xc7"
"\x96\xdb\xde\xed\x99\x0a\xe4\x6b\xda";
ASSERT((ms = mg_sntp_parse(sntp_good, sizeof(sntp_good))) > 0);
#if MG_ARCH == MG_ARCH_UNIX
time_t t = (time_t) (ms / 1000);
struct tm tm;
gmtime_r(&t, &tm);
ASSERT(tm.tm_year == 116);
ASSERT(tm.tm_mon == 10);
ASSERT(tm.tm_mday == 22);
ASSERT(tm.tm_hour == 16);
ASSERT(tm.tm_min == 15);
ASSERT(tm.tm_sec == 21);
#endif
ASSERT(mg_sntp_parse(bad_good, sizeof(bad_good)) < 0);
}
ASSERT(mg_sntp_parse(NULL, 0) == -1);
}
struct mqtt_data {