Make sure to send an empty reply to AAAA queries when IPv6 is disabled

jandubois · jandubois · commit 6d086d2afdc4 · 2022-02-14T23:19:01.000-08:00
Forwarding the request to the defaultHandler could result in returning
NXDOMAIN, which can break resolution of IPv4 addresses.

Signed-off-by: Jan Dubois &lt;jan.dubois@suse.com&gt;
diff --git a/pkg/hostagent/dns/dns.go b/pkg/hostagent/dns/dns.go
@@ -82,6 +82,7 @@ func (h *Handler) handleQuery(w dns.ResponseWriter, req *dns.Msg) {
 		switch q.Qtype {
 		case dns.TypeAAAA:
 			if !h.IPv6 {
+				handled = true
 				break
 			}
 			fallthrough

Original file line number	Diff line number	Diff line change
`@@ -82,6 +82,7 @@ func (h Handler) handleQuery(w dns.ResponseWriter, req dns.Msg) {`
`82`	`82`	`switch q.Qtype {`
`83`	`83`	`case dns.TypeAAAA:`
`84`	`84`	`if !h.IPv6 {`
	`85`	`+ handled = true`
`85`	`86`	`break`
`86`	`87`	`}`
`87`	`88`	`fallthrough`