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Implement encodeKVasRFC1464 function

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Patrick Sodré 2017-08-10 21:37:17 -04:00 committed by Frank Schroeder
parent d880634cfa
commit 55c2746963
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1 changed files with 17 additions and 2 deletions
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19
agent/dns.go
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@ -538,8 +538,23 @@ RPC:
// encodeKVasRFC1464 encodes a key-value pair according to RFC1464
func encodeKVasRFC1464(key, value string) (txt string) {
txt = key + "=" + value
return txt
// For details on these replacements c.f. https://www.ietf.org/rfc/rfc1464.txt
key = strings.Replace(key, "`", "``", -1)
key = strings.Replace(key, "=", "`=", -1)
// Backquote the leading spaces
leadingSpacesRE := regexp.MustCompile("^ +")
numLeadingSpaces := len(leadingSpacesRE.FindString(key))
key = leadingSpacesRE.ReplaceAllString(key, strings.Repeat("` ", numLeadingSpaces))
// Backquote the trailing spaces
trailingSpacesRE := regexp.MustCompile(" +$")
numTrailingSpaces := len(trailingSpacesRE.FindString(key))
key = trailingSpacesRE.ReplaceAllString(key, strings.Repeat("` ", numTrailingSpaces))
value = strings.Replace(value, "`", "``", -1)
return key + "=" + value
}
// formatNodeRecord takes a Node and returns an A, AAAA, TXT or CNAME record