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Add ControlD public DNS to OS resolver

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Since the OS resolver only returns response with NOERROR first, it's
safe to use ControlD public DNS in parallel with system DNS. Local
domains would resolve only though local resolvers, because public ones
will return NXDOMAIN response.
This commit is contained in:
Cuong Manh Le
2024-07-12 17:35:34 +07:00
committed by Cuong Manh Le
parent dc48c908b8
commit 56f9c72569
3 changed files with 103 additions and 14 deletions
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dot.go
+1 -1
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@@ -18,7 +18,7 @@ func (r *dotResolver) Resolve(ctx context.Context, msg *dns.Msg) (*dns.Msg, erro
// dns.controld.dev first. By using a dialer with custom resolver,
// we ensure that we can always resolve the bootstrap domain
// regardless of the machine DNS status.
dialer := newDialer(net.JoinHostPort(bootstrapDNS, "53"))
dialer := newDialer(net.JoinHostPort(controldBootstrapDns, "53"))
dnsTyp := uint16(0)
if msg != nil && len(msg.Question) > 0 {
dnsTyp = msg.Question[0].Qtype