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Set SNI by default if the peering URI contains a DNS name
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parent
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@ -99,6 +99,13 @@ func (l *links) call(u *url.URL, sintf string) error {
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case "tls":
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tcpOpts.upgrade = l.tcp.tls.forDialer
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tcpOpts.tlsSNI = u.Query().Get("sni")
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if tcpOpts.tlsSNI == "" {
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// SNI headers must contain hostnames and not IP addresses, so we must make sure
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// that we do not populate the SNI with an IP literal.
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if host, _, err := net.SplitHostPort(u.Host); err == nil && net.ParseIP(host) == nil {
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tcpOpts.tlsSNI = host
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}
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}
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l.tcp.call(u.Host, tcpOpts, sintf)
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default:
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return errors.New("unknown call scheme: " + u.Scheme)
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