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kresd: Unified listen declarations

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Deperecates the interfaces option which was used to generate a host:port
list whereas the port was always hardcoded to 53. This unifies the
listen configuration for plain and TLS sockets and allows to specify a
port without an address for wildcard binds.
This commit is contained in:
Dustin Frisch 2019-12-16 23:06:27 +01:00
parent b443abf914
commit f886a14dbd
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GPG Key ID: B4C3BF012D9B26BE
2 changed files with 25 additions and 8 deletions
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8
nixos/doc/manual/release-notes/rl-2003.xml
View File

@ -251,6 +251,14 @@
in container config.
</para>
</listitem>
<listitem>
<para>
The <literal>kresd</literal> services deprecates the <literal>interfaces</literal> option
in favor of the <literal>listenPlain</literal> option which requires full
<link xlink:href="https://www.freedesktop.org/software/systemd/man/systemd.socket.html#ListenStream=">systemd.socket compatible</link>
declaration which always include a port.
</para>
</listitem>
</itemizedlist>
</section>

25
nixos/modules/services/networking/kresd.nix
View File

@ -13,6 +13,17 @@ in
{
meta.maintainers = [ maintainers.vcunat /* upstream developer */ ];
imports = [
(mkChangedOptionModule [ "services" "kresd" "interfaces" ] [ "services" "kresd" "listenPlain" ]
(config:
let value = getAttrFromPath [ "services" "kresd" "interfaces" ] config;
in map
(iface: if elem ":" (stringToCharacters iface) then "[${iface}]:53" else "${iface}:53") # Syntax depends on being IPv6 or IPv4.
value
)
)
];
###### interface
options.services.kresd = {
enable = mkOption {
@ -39,11 +50,12 @@ in
Directory for caches. They are intended to survive reboots.
'';
};
interfaces = mkOption {
listenPlain = mkOption {
type = with types; listOf str;
default = [ "::1" "127.0.0.1" ];
default = [ "[::1]:53" "127.0.0.1:53" ];
description = ''
What addresses the server should listen on. (UDP+TCP 53)
What addresses and ports the server should listen on.
For detailed syntax see ListenStream in man systemd.socket.
'';
};
listenTLS = mkOption {
@ -51,7 +63,7 @@ in
default = [];
example = [ "198.51.100.1:853" "[2001:db8::1]:853" "853" ];
description = ''
Addresses on which kresd should provide DNS over TLS (see RFC 7858).
Addresses and ports on which kresd should provide DNS over TLS (see RFC 7858).
For detailed syntax see ListenStream in man systemd.socket.
'';
};
@ -76,10 +88,7 @@ in
systemd.sockets.kresd = rec {
wantedBy = [ "sockets.target" ];
before = wantedBy;
listenStreams = map
# Syntax depends on being IPv6 or IPv4.
(iface: if elem ":" (stringToCharacters iface) then "[${iface}]:53" else "${iface}:53")
cfg.interfaces;
listenStreams = cfg.listenPlain;
socketConfig = {
ListenDatagram = listenStreams;
FreeBind = true;