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| author | A. Wilcox <AWilcox@Wilcox-Tech.com> | 2022-12-29 21:15:50 -0600 |
|---|---|---|
| committer | A. Wilcox <AWilcox@Wilcox-Tech.com> | 2022-12-29 21:15:50 -0600 |
| commit | 009c2456c15567fcc1baa581ec203e4677956e5c (patch) | |
| tree | 5b1718d4557eff526b446f566d3af6cc6090c1dd | |
| parent | 8f9259450aa43a6fd539e428e61e2961b725fbae (diff) | |
| download | musl-awilfox/monotonic-dns.tar.gz musl-awilfox/monotonic-dns.tar.bz2 musl-awilfox/monotonic-dns.tar.xz musl-awilfox/monotonic-dns.zip | |
dns: Prefer monotonic clock for DNS lookup timeoutsawilfox/monotonic-dns
Before this commit, DNS timeouts always used CLOCK_REALTIME, which could
produce errors if wall time changed for whatever reason.
Now we try CLOCK_MONOTONIC and only fall back to CLOCK_REALTIME when it
is unavailable.
| -rw-r--r-- | src/network/res_msend.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/network/res_msend.c b/src/network/res_msend.c index 11c6aa0e..fef7e3a2 100644 --- a/src/network/res_msend.c +++ b/src/network/res_msend.c @@ -25,7 +25,8 @@ static void cleanup(void *p) static unsigned long mtime() { struct timespec ts; - clock_gettime(CLOCK_REALTIME, &ts); + if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0 && errno == ENOSYS) + clock_gettime(CLOCK_REALTIME, &ts); return (unsigned long)ts.tv_sec * 1000 + ts.tv_nsec / 1000000; } |