diff options
Diffstat (limited to 'plugin/cache/cache.go')
| -rw-r--r-- | plugin/cache/cache.go | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/plugin/cache/cache.go b/plugin/cache/cache.go index b37e527cf..5d9bd746b 100644 --- a/plugin/cache/cache.go +++ b/plugin/cache/cache.go @@ -117,6 +117,19 @@ func (w *ResponseWriter) WriteMsg(res *dns.Msg) error { return nil } + // Apply capped TTL to this reply to avoid jarring TTL experience 1799 -> 8 (e.g.) + ttl := uint32(duration.Seconds()) + for i := range res.Answer { + res.Answer[i].Header().Ttl = ttl + } + for i := range res.Ns { + res.Ns[i].Header().Ttl = ttl + } + for i := range res.Extra { + if res.Extra[i].Header().Rrtype != dns.TypeOPT { + res.Extra[i].Header().Ttl = ttl + } + } return w.ResponseWriter.WriteMsg(res) } |