forked from mirrors/nixpkgs
2e751c0772
the conversion procedure is simple: - find all things that look like options, ie calls to either `mkOption` or `lib.mkOption` that take an attrset. remember the attrset as the option - for all options, find a `description` attribute who's value is not a call to `mdDoc` or `lib.mdDoc` - textually convert the entire value of the attribute to MD with a few simple regexes (the set from mdize-module.sh) - if the change produced a change in the manual output, discard - if the change kept the manual unchanged, add some text to the description to make sure we've actually found an option. if the manual changes this time, keep the converted description this procedure converts 80% of nixos options to markdown. around 2000 options remain to be inspected, but most of those fail the "does not change the manual output check": currently the MD conversion process does not faithfully convert docbook tags like <code> and <package>, so any option using such tags will not be converted at all.
161 lines
4.4 KiB
Nix
161 lines
4.4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.libreswan;
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libexec = "${pkgs.libreswan}/libexec/ipsec";
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ipsec = "${pkgs.libreswan}/sbin/ipsec";
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trim = chars: str:
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let
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nonchars = filter (x : !(elem x.value chars))
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(imap0 (i: v: {ind = i; value = v;}) (stringToCharacters str));
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in
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if length nonchars == 0 then ""
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else substring (head nonchars).ind (add 1 (sub (last nonchars).ind (head nonchars).ind)) str;
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indent = str: concatStrings (concatMap (s: [" " (trim [" " "\t"] s) "\n"]) (splitString "\n" str));
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configText = indent (toString cfg.configSetup);
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connectionText = concatStrings (mapAttrsToList (n: v:
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''
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conn ${n}
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${indent v}
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'') cfg.connections);
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configFile = pkgs.writeText "ipsec-nixos.conf"
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''
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config setup
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${configText}
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${connectionText}
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'';
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policyFiles = mapAttrs' (name: text:
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{ name = "ipsec.d/policies/${name}";
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value.source = pkgs.writeText "ipsec-policy-${name}" text;
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}) cfg.policies;
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in
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{
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###### interface
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options = {
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services.libreswan = {
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enable = mkEnableOption "Libreswan IPsec service";
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configSetup = mkOption {
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type = types.lines;
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default = ''
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protostack=netkey
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virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:25.0.0.0/8,%v4:100.64.0.0/10,%v6:fd00::/8,%v6:fe80::/10
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'';
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example = ''
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secretsfile=/root/ipsec.secrets
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protostack=netkey
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virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:25.0.0.0/8,%v4:100.64.0.0/10,%v6:fd00::/8,%v6:fe80::/10
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'';
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description = lib.mdDoc "Options to go in the 'config setup' section of the Libreswan IPsec configuration";
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};
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connections = mkOption {
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type = types.attrsOf types.lines;
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default = {};
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example = literalExpression ''
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{ myconnection = '''
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auto=add
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left=%defaultroute
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leftid=@user
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right=my.vpn.com
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ikev2=no
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ikelifetime=8h
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''';
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}
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'';
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description = lib.mdDoc "A set of connections to define for the Libreswan IPsec service";
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};
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policies = mkOption {
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type = types.attrsOf types.lines;
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default = {};
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example = literalExpression ''
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{ private-or-clear = '''
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# Attempt opportunistic IPsec for the entire Internet
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0.0.0.0/0
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::/0
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''';
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}
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'';
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description = ''
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A set of policies to apply to the IPsec connections.
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<note><para>
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The policy name must match the one of connection it needs to apply to.
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</para></note>
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'';
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};
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disableRedirects = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to disable send and accept redirects for all nework interfaces.
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See the Libreswan [
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FAQ](https://libreswan.org/wiki/FAQ#Why_is_it_recommended_to_disable_send_redirects_in_.2Fproc.2Fsys.2Fnet_.3F) page for why this is recommended.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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# Install package, systemd units, etc.
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environment.systemPackages = [ pkgs.libreswan pkgs.iproute2 ];
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systemd.packages = [ pkgs.libreswan ];
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systemd.tmpfiles.packages = [ pkgs.libreswan ];
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# Install configuration files
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environment.etc = {
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"ipsec.secrets".source = "${pkgs.libreswan}/etc/ipsec.secrets";
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"ipsec.conf".source = "${pkgs.libreswan}/etc/ipsec.conf";
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"ipsec.d/01-nixos.conf".source = configFile;
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} // policyFiles;
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# Create NSS database directory
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systemd.tmpfiles.rules = [ "d /var/lib/ipsec/nss 755 root root -" ];
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systemd.services.ipsec = {
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description = "Internet Key Exchange (IKE) Protocol Daemon for IPsec";
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wantedBy = [ "multi-user.target" ];
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restartTriggers = [ configFile ] ++ mapAttrsToList (n: v: v.source) policyFiles;
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path = with pkgs; [
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libreswan
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iproute2
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procps
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nssTools
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iptables
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nettools
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];
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preStart = optionalString cfg.disableRedirects ''
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# Disable send/receive redirects
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echo 0 | tee /proc/sys/net/ipv4/conf/*/send_redirects
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echo 0 | tee /proc/sys/net/ipv{4,6}/conf/*/accept_redirects
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'';
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};
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};
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}
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