nixos/networking-interfaces: add preferTempAddress option
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@ -94,7 +94,7 @@ let
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checkNetwork = checkUnitConfig "Network" [
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(assertOnlyFields [
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"Description" "DHCP" "DHCPServer" "IPForward" "IPMasquerade" "IPv4LL" "IPv4LLRoute"
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"LLMNR" "MulticastDNS" "Domains" "Bridge" "Bond"
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"LLMNR" "MulticastDNS" "Domains" "Bridge" "Bond" "IPv6PrivacyExtensions"
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])
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(assertValueOneOf "DHCP" ["both" "none" "v4" "v6"])
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(assertValueOneOf "DHCPServer" boolValues)
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@ -104,6 +104,7 @@ let
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(assertValueOneOf "IPv4LLRoute" boolValues)
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(assertValueOneOf "LLMNR" boolValues)
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(assertValueOneOf "MulticastDNS" boolValues)
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(assertValueOneOf "IPv6PrivacyExtensions" ["yes" "no" "prefer-public" "kernel"])
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];
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checkAddress = checkUnitConfig "Address" [
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@ -91,6 +91,7 @@ in
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(if i.useDHCP != null then i.useDHCP else cfg.useDHCP && interfaceIps i == [ ]));
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address = flip map (interfaceIps i)
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(ip: "${ip.address}/${toString ip.prefixLength}");
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networkConfig.IPv6PrivacyExtensions = "kernel";
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} ];
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})))
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(mkMerge (flip mapAttrsToList cfg.bridges (name: bridge: {
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@ -155,6 +155,16 @@ let
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description = "Name of the interface.";
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};
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preferTempAddress = mkOption {
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type = types.bool;
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default = cfg.enableIPv6;
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defaultText = literalExample "config.networking.enableIpv6";
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description = ''
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When using SLAAC prefer a temporary (IPv6) address over the EUI-64
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address for originating connections. This is used to reduce tracking.
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'';
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};
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useDHCP = mkOption {
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type = types.nullOr types.bool;
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default = null;
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@ -941,6 +951,11 @@ in
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message = ''
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The networking.interfaces."${i.name}" must not have any defined ips when it is a slave.
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'';
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})) ++ (flip map interfaces (i: {
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assertion = i.preferTempAddress -> cfg.enableIPv6;
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message = ''
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Temporary addresses are only needed when IPv6 is enabled.
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'';
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})) ++ [
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{
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assertion = cfg.hostId == null || (stringLength cfg.hostId == 8 && isHexString cfg.hostId);
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@ -963,9 +978,10 @@ in
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"net.ipv6.conf.all.disable_ipv6" = mkDefault (!cfg.enableIPv6);
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"net.ipv6.conf.default.disable_ipv6" = mkDefault (!cfg.enableIPv6);
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"net.ipv6.conf.all.forwarding" = mkDefault (any (i: i.proxyARP) interfaces);
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} // listToAttrs (concatLists (flip map (filter (i: i.proxyARP) interfaces)
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(i: flip map [ "4" "6" ] (v: nameValuePair "net.ipv${v}.conf.${i.name}.proxy_arp" true))
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));
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} // listToAttrs (flip concatMap (filter (i: i.proxyARP) interfaces)
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(i: flip map [ "4" "6" ] (v: nameValuePair "net.ipv${v}.conf.${i.name}.proxy_arp" true)))
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// listToAttrs (flip map (filter (i: i.preferTempAddress) interfaces)
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(i: nameValuePair "net.ipv6.conf.${i.name}.use_tempaddr" 2));
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# Capabilities won't work unless we have at-least a 4.3 Linux
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# kernel because we need the ambient capability
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