coredns/plugin/dnssec/responsewriter.go
Hu Shuai e233f59ee8
Fix some typos in comments. (#4100)
Signed-off-by: Hu Shuai <hus.fnst@cn.fujitsu.com>
2020-09-01 09:10:45 +02:00

43 lines
1.2 KiB
Go

package dnssec
import (
"time"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
// ResponseWriter signs the response on the fly.
type ResponseWriter struct {
dns.ResponseWriter
d Dnssec
server string // server label for metrics.
}
// WriteMsg implements the dns.ResponseWriter interface.
func (d *ResponseWriter) WriteMsg(res *dns.Msg) error {
// By definition we should sign anything that comes back, we should still figure out for
// which zone it should be.
state := request.Request{W: d.ResponseWriter, Req: res}
zone := plugin.Zones(d.d.zones).Matches(state.Name())
if zone == "" {
return d.ResponseWriter.WriteMsg(res)
}
state.Zone = zone
res = d.d.Sign(state, time.Now().UTC(), d.server)
cacheSize.WithLabelValues(d.server, "signature").Set(float64(d.d.cache.Len()))
// No need for EDNS0 trickery, as that is handled by the server.
return d.ResponseWriter.WriteMsg(res)
}
// Write implements the dns.ResponseWriter interface.
func (d *ResponseWriter) Write(buf []byte) (int, error) {
log.Warning("Dnssec called with Write: not signing reply")
n, err := d.ResponseWriter.Write(buf)
return n, err
}