Method ServeDNS

proxy/serverdnscrypt.go:119–138

ServeDNS implements the [dnscrypt.Handler] interface for *dnsCryptHandler.

(
	ctx context.Context,
	rw dnscrypt.ResponseWriter,
	req *dns.Msg,
)

// ServeDNS implements the [dnscrypt.Handler] interface for *dnsCryptHandler.
func (h *dnsCryptHandler) ServeDNS(
	ctx context.Context,
	rw dnscrypt.ResponseWriter,
	req *dns.Msg,
) (err error) {
	addr := netutil.NetAddrToAddrPort(rw.RemoteAddr())
	d := h.proxy.newDNSContext(ProtoDNSCrypt, req, addr)
	d.DNSCryptResponseWriter = rw

	ctx, cancel := h.proxy.reqCtx.New(ctx)
	defer cancel()

	err = h.reqSema.Acquire(ctx)
	if err != nil {
		return fmt.Errorf("dnsproxy: dnscrypt: acquiring semaphore: %w", err)
	}
	defer h.reqSema.Release()

	return h.proxy.handleDNSRequest(ctx, d)
}

// respondDNSCrypt writes a response to the client using the DNSCrypt response
// writer.  d must not be nil.