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trust-dns: properly quote TXT records

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Colin 2023-03-14 11:34:48 +00:00
parent 8fc57c4249
commit c5c1378f59
1 changed files with 14 additions and 1 deletions
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15
modules/services/trust-dns.nix
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@ -7,7 +7,20 @@ with lib;
let
cfg = config.sane.services.trust-dns;
toml = pkgs.formats.toml { };
fmtRecord = proto: rrtype: name: value: "${name}\t${proto}\t${rrtype}\t${value}";
recordFormatters = {
# quote rules for zone files:
# - any character may be encoded by `\DDD`, where `DDD` represents its ascii value in base 8.
# - any non-digit `X` may be encoded by `\X`.
# - stated in: <https://www.ietf.org/rfc/rfc1035.txt>: 5.1 Format
# - visible in <trust-dns:crates/proto/src/serialize/txt/zone_lex.rs:escape_seq>
# for us, we can just replace `\` => `\\ and `"` -> `\"`
TXT = value: "\"" + (lib.escape [ "\\" "\"" ] value) + "\"";
};
fmtRecord = proto: rrtype: name: value:
let
formatter = recordFormatters."${rrtype}" or lib.id;
in
"${name}\t${proto}\t${rrtype}\t${formatter value}";
fmtRecordList = proto: rrtype: name: values: concatStringsSep
"\n"
(map (fmtRecord proto rrtype name) values)