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Construct a real DNS packet for DNSCrypt-Proxy

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Star Brilliant
2018-06-26 15:20:43 +08:00
parent ca33027e04
commit 11056bcad5
1 changed files with 2 additions and 2 deletions
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4
doh-server/ietf.go
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@@ -174,10 +174,10 @@ func (s *Server) generateResponseIETF(w http.ResponseWriter, r *http.Request, re
func (s *Server) patchDNSCryptProxyReqID(requestBinary []byte, w http.ResponseWriter) bool {
if bytes.Equal(requestBinary, []byte("\xca\xfe\x01\x00\x00\x01\x00\x00\x00\x00\x00\x01\x00\x00\x02\x00\x01\x00\x00\x29\x10\x00\x00\x00\x80\x00\x00\x00")) {
log.Println("DNSCrypt-Proxy detected. Patching response.")
w.Header().Set("Content-Type", "application/octet-stream")
w.Header().Set("Content-Type", "application/dns-message")
now := time.Now().UTC().Format(http.TimeFormat)
w.Header().Set("Date", now)
w.Write([]byte("\xca\xfe\x81\x01\x00\x01\r\nWorkaround a bug causing DNSCrypt-Proxy to expect a response with TransactionID = 0xcafe\r\nRefer to https://github.com/jedisct1/dnscrypt-proxy/issues/526 for details.\r\n"))
w.Write([]byte("\xca\xfe\x81\x05\x00\x01\x00\x01\x00\x00\x00\x00\x00\x00\x02\x00\x01\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\xa8\xa7\r\nWorkaround a bug causing DNSCrypt-Proxy to expect a response with TransactionID = 0xcafe\r\nRefer to https://github.com/jedisct1/dnscrypt-proxy/issues/526 for details."))
return true
}
return false