From ea1afcebbc2e1a87dddee231b48da5a891461ff9 Mon Sep 17 00:00:00 2001 From: Brent Cook Date: Mon, 8 Jun 2020 06:53:10 -0500 Subject: [PATCH 16/18] Don't retry DNS if Checking Disable flag is not available. --- src/usr.sbin/ntpd/config.c | 4 +++- src/usr.sbin/ntpd/ntp_dns.c | 8 +++++--- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/src/usr.sbin/ntpd/config.c b/src/usr.sbin/ntpd/config.c index 856c3147cc..fc9df84bc4 100644 --- a/src/usr.sbin/ntpd/config.c +++ b/src/usr.sbin/ntpd/config.c @@ -138,9 +138,10 @@ int host_dns(const char *s, int synced, struct ntp_addr **hn) { int error, save_opts; - + log_debug("trying to resolve %s", s); error = host_dns1(s, hn, 0); +#ifdef RES_USE_CD if (!synced && error <= 0) { log_debug("no luck, trying to resolve %s without checking", s); save_opts = _res.options; @@ -148,6 +149,7 @@ host_dns(const char *s, int synced, struct ntp_addr **hn) error = host_dns1(s, hn, 1); _res.options = save_opts; } +#endif log_debug("resolve %s done: %d", s, error); return error; } diff --git a/src/usr.sbin/ntpd/ntp_dns.c b/src/usr.sbin/ntpd/ntp_dns.c index 439e7ab8a9..e74a8abe4d 100644 --- a/src/usr.sbin/ntpd/ntp_dns.c +++ b/src/usr.sbin/ntpd/ntp_dns.c @@ -226,14 +226,16 @@ probe_root_ns(void) old_options = _res.options; _res.retrans = 1; _res.retry = 1; +#ifdef RES_USE_CD _res.options |= RES_USE_CD; - +#endif + ret = res_query(".", C_IN, T_NS, buf, sizeof(buf)); _res.retrans = old_retrans; _res.retry = old_retry; _res.options = old_options; - + return ret; } @@ -242,7 +244,7 @@ probe_root(void) { int n; - n = probe_root_ns(); + n = probe_root_ns(); if (n < 0) { /* give programs like unwind a second chance */ sleep(1); -- 2.27.0