From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Tue, 20 Aug 2024 13:14:45 +0000 (+0200)
Subject: dnsdist: Take nanoseconds into account in `DynBlock`'s `until` accessor
X-Git-Tag: dnsdist-1.9.7~10^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F14643%2Fhead;p=thirdparty%2Fpdns.git

dnsdist: Take nanoseconds into account in `DynBlock`'s `until` accessor

(cherry picked from commit 23bea0c4486ee30b10d1d00a50244de49b970112)
---

diff --git a/pdns/dnsdist-lua-inspection.cc b/pdns/dnsdist-lua-inspection.cc
index 05b37978aa..5b62616323 100644
--- a/pdns/dnsdist-lua-inspection.cc
+++ b/pdns/dnsdist-lua-inspection.cc
@@ -962,7 +962,21 @@ void setupLuaInspection(LuaContext& luaCtx)
       gettime(&nowMonotonic);
       timespec nowRealTime{};
       gettime(&nowRealTime, true);
-      nowRealTime.tv_sec += (block.until.tv_sec - nowMonotonic.tv_sec);
+
+      auto seconds = block.until.tv_sec - nowMonotonic.tv_sec;
+      auto nseconds = block.until.tv_nsec - nowMonotonic.tv_nsec;
+      if (nseconds < 0) {
+        seconds -= 1;
+        nseconds += 1000000000;
+      }
+
+      nowRealTime.tv_sec += seconds;
+      nowRealTime.tv_nsec += nseconds;
+      if (nowRealTime.tv_nsec > 1000000000) {
+        nowRealTime.tv_sec += 1;
+        nowRealTime.tv_nsec -= 1000000000;
+      }
+
       return nowRealTime; }, [](DynBlock& block, [[maybe_unused]] timespec until) {});
   luaCtx.registerMember<DynBlock, unsigned int>("blocks", [](const DynBlock& block) { return block.blocks.load(); }, [](DynBlock& block, [[maybe_unused]] unsigned int blocks) { });
   luaCtx.registerMember("action", &DynBlock::action);