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Merge pull request #1629 from jbrzusto/fix-mg_ntp_parse

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NTP reponse gives fractional (not micro-) seconds, per RFC5905
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Sergey Lyubka 2022-07-15 00:43:31 +01:00 committed by GitHub
commit 86aa38bfd5
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2 changed files with 4 additions and 4 deletions
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4
mongoose.c
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@ -3797,8 +3797,8 @@ int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
} else if (version == 4 || version == 3) { } else if (version == 4 || version == 3) {
uint32_t *data = (uint32_t *) &buf[40]; uint32_t *data = (uint32_t *) &buf[40];
unsigned long seconds = mg_ntohl(data[0]) - SNTP_TIME_OFFSET; unsigned long seconds = mg_ntohl(data[0]) - SNTP_TIME_OFFSET;
unsigned long useconds = mg_ntohl(data[1]); unsigned long fracseconds = mg_ntohl(data[1]);
res = ((int64_t) seconds) * 1000 + (int64_t) ((useconds / 1000) % 1000); res = ((int64_t) seconds) * 1000 + (((int64_t) (fracseconds) * 1000) >> 32);
} else { } else {
MG_ERROR(("unexpected version: %d", version)); MG_ERROR(("unexpected version: %d", version));
} }

4
src/sntp.c
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@ -20,8 +20,8 @@ int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
} else if (version == 4 || version == 3) { } else if (version == 4 || version == 3) {
uint32_t *data = (uint32_t *) &buf[40]; uint32_t *data = (uint32_t *) &buf[40];
unsigned long seconds = mg_ntohl(data[0]) - SNTP_TIME_OFFSET; unsigned long seconds = mg_ntohl(data[0]) - SNTP_TIME_OFFSET;
unsigned long useconds = mg_ntohl(data[1]); unsigned long fracseconds = mg_ntohl(data[1]);
res = ((int64_t) seconds) * 1000 + (int64_t) ((useconds / 1000) % 1000); res = ((int64_t) seconds) * 1000 + (((int64_t) (fracseconds) * 1000) >> 32);
} else { } else {
MG_ERROR(("unexpected version: %d", version)); MG_ERROR(("unexpected version: %d", version));
} }