50 lines
1.3 KiB
Nix
50 lines
1.3 KiB
Nix
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# Provides an option to easily rename interfaces by their mac addresses.
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{
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config,
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lib,
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pkgs,
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...
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}: let
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inherit
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(lib)
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attrValues
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concatStringsSep
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duplicates
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mapAttrsToList
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mkIf
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mkOption
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types
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;
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cfg = config.networking.renameInterfacesByMac;
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interfaceNamesUdevRules = pkgs.writeTextFile {
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name = "interface-names-udev-rules";
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text = concatStringsSep "\n" (mapAttrsToList
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(name: mac: ''SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="${mac}", NAME:="${name}"'')
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cfg);
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destination = "/etc/udev/rules.d/01-interface-names.rules";
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};
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in {
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options.networking.renameInterfacesByMac = mkOption {
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default = {};
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example = {lan = "11:22:33:44:55:66";};
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description = "Allows naming of network interfaces based on their physical address";
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type = types.attrsOf types.str;
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};
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config = mkIf (cfg != {}) {
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assertions = let
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duplicateMacs = duplicates (attrValues cfg);
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in [
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{
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assertion = duplicateMacs == [];
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message = "Duplicate mac addresses found in network interface name assignment: ${concatStringsSep ", " duplicateMacs}";
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}
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];
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services.udev.packages = [interfaceNamesUdevRules];
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boot.initrd.services.udev.packages = [interfaceNamesUdevRules];
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};
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}
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