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More expressive variable names in SNTP

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This commit is contained in:
Sergey Lyubka 2024-06-08 09:00:08 +01:00
parent b0e18d5e8a
commit 6357b30712
2 changed files with 17 additions and 18 deletions
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18
mongoose.c
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@ -7152,7 +7152,7 @@ static int64_t gettimestamp(const uint32_t *data) {
}
int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
int64_t res = -1;
int64_t epoch_milliseconds = -1;
int mode = len > 0 ? buf[0] & 7 : 0;
int version = len > 0 ? (buf[0] >> 3) & 7 : 0;
if (len < 48) {
@ -7163,17 +7163,17 @@ int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
MG_ERROR(("%s", "server sent a kiss of death"));
} else if (version == 4 || version == 3) {
// int64_t ref = gettimestamp((uint32_t *) &buf[16]);
int64_t t0 = gettimestamp((uint32_t *) &buf[24]);
int64_t t1 = gettimestamp((uint32_t *) &buf[32]);
int64_t t2 = gettimestamp((uint32_t *) &buf[40]);
int64_t t3 = (int64_t) mg_millis();
int64_t delta = (t3 - t0) - (t2 - t1);
MG_VERBOSE(("%lld %lld %lld %lld delta:%lld", t0, t1, t2, t3, delta));
res = t2 + delta / 2;
int64_t origin_time = gettimestamp((uint32_t *) &buf[24]);
int64_t receive_time = gettimestamp((uint32_t *) &buf[32]);
int64_t transmit_time = gettimestamp((uint32_t *) &buf[40]);
int64_t now = (int64_t) mg_millis();
int64_t travel_time = (now - origin_time) - (transmit_time - receive_time);
MG_INFO(("%lld %lld", transmit_time, travel_time));
epoch_milliseconds = transmit_time + travel_time / 2;
} else {
MG_ERROR(("unexpected version: %d", version));
}
return res;
return epoch_milliseconds;
}
static void sntp_cb(struct mg_connection *c, int ev, void *ev_data) {

17
src/sntp.c
View File

@ -14,7 +14,7 @@ static int64_t gettimestamp(const uint32_t *data) {
}
int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
int64_t res = -1;
int64_t epoch_milliseconds = -1;
int mode = len > 0 ? buf[0] & 7 : 0;
int version = len > 0 ? (buf[0] >> 3) & 7 : 0;
if (len < 48) {
@ -25,17 +25,16 @@ int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
MG_ERROR(("%s", "server sent a kiss of death"));
} else if (version == 4 || version == 3) {
// int64_t ref = gettimestamp((uint32_t *) &buf[16]);
int64_t t0 = gettimestamp((uint32_t *) &buf[24]);
int64_t t1 = gettimestamp((uint32_t *) &buf[32]);
int64_t t2 = gettimestamp((uint32_t *) &buf[40]);
int64_t t3 = (int64_t) mg_millis();
int64_t delta = (t3 - t0) - (t2 - t1);
MG_VERBOSE(("%lld %lld %lld %lld delta:%lld", t0, t1, t2, t3, delta));
res = t2 + delta / 2;
int64_t origin_time = gettimestamp((uint32_t *) &buf[24]);
int64_t receive_time = gettimestamp((uint32_t *) &buf[32]);
int64_t transmit_time = gettimestamp((uint32_t *) &buf[40]);
int64_t now = (int64_t) mg_millis();
int64_t travel_time = (now - origin_time) - (transmit_time - receive_time);
epoch_milliseconds = transmit_time + travel_time / 2;
} else {
MG_ERROR(("unexpected version: %d", version));
}
return res;
return epoch_milliseconds;
}
static void sntp_cb(struct mg_connection *c, int ev, void *ev_data) {