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|
{ config, pkgs, lib, ... }:
with config.krebs.lib;
let
cfg = config.krebs.retiolum;
out = {
options.krebs.retiolum = api;
config = lib.mkIf cfg.enable imp;
};
api = {
enable = mkEnableOption "krebs.retiolum";
name = mkOption {
type = types.str;
default = config.networking.hostName;
# Description stolen from tinc.conf(5).
description = ''
This is the name which identifies this tinc daemon. It must
be unique for the virtual private network this daemon will
connect to. The Name may only consist of alphanumeric and
underscore characters. If Name starts with a $, then the
contents of the environment variable that follows will be
used. In that case, invalid characters will be converted to
underscores. If Name is $HOST, but no such environment
variable exist, the hostname will be read using the
gethostnname() system call This is the name which identifies
the this tinc daemon.
'';
};
netname = mkOption {
type = types.str;
default = "retiolum";
description = ''
The tinc network name.
It is used to name the TUN device and to generate the default value for
<literal>config.krebs.retiolum.hosts</literal>.
'';
};
extraConfig = mkOption {
type = types.str;
default = "";
description = ''
Extra Configuration to be appended to tinc.conf
'';
};
tincPackage = mkOption {
type = types.package;
default = pkgs.tinc;
description = "Tincd package to use.";
};
hosts = mkOption {
type = with types; attrsOf host;
default =
filterAttrs (_: h: hasAttr cfg.netname h.nets) config.krebs.hosts;
description = ''
Hosts to generate <literal>config.krebs.retiolum.hostsPackage</literal>.
Note that these hosts must have a network named
<literal>config.krebs.retiolum.netname</literal>.
'';
};
hostsPackage = mkOption {
type = types.package;
default = pkgs.stdenv.mkDerivation {
name = "${cfg.netname}-tinc-hosts";
phases = [ "installPhase" ];
installPhase = ''
mkdir $out
${concatStrings (mapAttrsToList (_: host: ''
echo ${shell.escape host.nets.${cfg.netname}.tinc.config} \
> $out/${shell.escape host.name}
'') cfg.hosts)}
'';
};
description = ''
Package of tinc host configuration files. By default, a package will
be generated from <literal>config.krebs.retiolum.hosts</literal>. This
option's main purpose is to expose the generated hosts package to other
modules, like <literal>config.krebs.tinc_graphs</literal>. But it can
also be used to provide a custom hosts directory.
'';
example = literalExample ''
(pkgs.stdenv.mkDerivation {
name = "my-tinc-hosts";
src = /home/tv/my-tinc-hosts;
installPhase = "cp -R . $out";
})
'';
};
iproutePackage = mkOption {
type = types.package;
default = pkgs.iproute;
description = "Iproute2 package to use.";
};
privateKeyFile = mkOption {
# TODO if it's types.path then it gets copied to /nix/store with
# bad unsafe permissions...
type = types.str;
default = toString <secrets/retiolum.rsa_key.priv>;
description = ''
Generate file with <literal>tincd -K</literal>.
This file must exist on the local system. The default points to
<secrets/retiolum.rsa_key.priv>.
'';
};
connectTo = mkOption {
type = types.listOf types.str;
default = [ "fastpoke" "pigstarter" "gum" ];
description = ''
The list of hosts in the network which the client will try to connect
to. These hosts should have an 'Address' configured which points to a
routeable IPv4 or IPv6 address.
'';
};
};
imp = {
environment.systemPackages = [ tinc iproute ];
systemd.services.retiolum = {
description = "Tinc daemon for Retiolum";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = [ tinc iproute ];
serviceConfig = rec {
PermissionsStartOnly = "true";
PrivateTmp = "true";
Restart = "always";
# TODO we cannot chroot (-R) b/c we use symlinks to hosts
# and the private key.
ExecStartPre = pkgs.writeScript "retiolum-init" ''
#! /bin/sh
install -o ${user.name} -m 0400 ${cfg.privateKeyFile} /tmp/retiolum-rsa_key.priv
'';
ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user.name} -D --pidfile=/var/run/tinc.${SyslogIdentifier}.pid";
SyslogIdentifier = "retiolum";
};
};
users.extraUsers = singleton {
inherit (user) name uid;
};
};
user = rec {
name = "retiolum";
uid = genid name;
};
tinc = cfg.tincPackage;
iproute = cfg.iproutePackage;
confDir = pkgs.runCommand "retiolum" {
# TODO text
executable = true;
preferLocalBuild = true;
} ''
set -euf
mkdir -p $out
ln -s ${cfg.hostsPackage} $out/hosts
cat > $out/tinc.conf <<EOF
Name = ${cfg.name}
Device = /dev/net/tun
Interface = ${cfg.netname}
${concatStrings (map (c : "ConnectTo = " + c + "\n") cfg.connectTo)}
PrivateKeyFile = /tmp/retiolum-rsa_key.priv
${cfg.extraConfig}
EOF
# source: krebscode/painload/retiolum/scripts/tinc_setup/tinc-up
cat > $out/tinc-up <<EOF
host=$out/hosts/${cfg.name}
${iproute}/sbin/ip link set \$INTERFACE up
addr4=\$(sed -n 's|^ *Subnet *= *\(10[.][^ ]*\) *$|\1|p' \$host)
if [ -n "\$addr4" ];then
${iproute}/sbin/ip -4 addr add \$addr4 dev \$INTERFACE
${iproute}/sbin/ip -4 route add 10.243.0.0/16 dev \$INTERFACE
fi
addr6=\$(sed -n 's|^ *Subnet *= *\(42[:][^ ]*\) *$|\1|p' \$host)
${iproute}/sbin/ip -6 addr add \$addr6 dev \$INTERFACE
${iproute}/sbin/ip -6 route add 42::/16 dev \$INTERFACE
EOF
chmod +x $out/tinc-up
'';
in out
|
