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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.nylon;
homeDir = "/var/lib/nylon";
configFile = cfg: pkgs.writeText "nylon-${cfg.name}.conf" ''
[General]
No-Simultaneous-Conn=${toString cfg.nrConnections}
Log=${if cfg.logging then "1" else "0"}
Verbose=${if cfg.verbosity then "1" else "0"}
[Server]
Binding-Interface=${cfg.acceptInterface}
Connecting-Interface=${cfg.bindInterface}
Port=${toString cfg.port}
Allow-IP=${concatStringsSep " " cfg.allowedIPRanges}
Deny-IP=${concatStringsSep " " cfg.deniedIPRanges}
'';
nylonOpts = { name, ... }: {
options = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Enables nylon as a running service upon activation.
'';
};
name = mkOption {
type = types.str;
default = "";
description = "The name of this nylon instance.";
};
nrConnections = mkOption {
type = types.int;
default = 10;
description = ''
The number of allowed simultaneous connections to the daemon, default 10.
'';
};
logging = mkOption {
type = types.bool;
default = false;
description = ''
Enable logging, default is no logging.
'';
};
verbosity = mkOption {
type = types.bool;
default = false;
description = ''
Enable verbose output, default is to not be verbose.
'';
};
acceptInterface = mkOption {
type = types.str;
default = "lo";
description = ''
Tell nylon which interface to listen for client requests on, default is "lo".
'';
};
bindInterface = mkOption {
type = types.str;
default = "enp3s0f0";
description = ''
Tell nylon which interface to use as an uplink, default is "enp3s0f0".
'';
};
port = mkOption {
type = types.int;
default = 1080;
description = ''
What port to listen for client requests, default is 1080.
'';
};
allowedIPRanges = mkOption {
type = with types; listOf str;
default = [ "192.168.0.0/16" "127.0.0.1/8" "172.16.0.1/12" "10.0.0.0/8" ];
description = ''
Allowed client IP ranges are evaluated first, defaults to ARIN IPv4 private ranges:
[ "192.168.0.0/16" "127.0.0.0/8" "172.16.0.0/12" "10.0.0.0/8" ]
'';
};
deniedIPRanges = mkOption {
type = with types; listOf str;
default = [ "0.0.0.0/0" ];
description = ''
Denied client IP ranges, these gets evaluated after the allowed IP ranges, defaults to all IPv4 addresses:
[ "0.0.0.0/0" ]
To block all other access than the allowed.
'';
};
};
config = { name = mkDefault name; };
};
mkNamedNylon = cfg: {
"nylon-${cfg.name}" = {
description = "Nylon, a lightweight SOCKS proxy server";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig =
{
User = "nylon";
Group = "nylon";
WorkingDirectory = homeDir;
ExecStart = "${pkgs.nylon}/bin/nylon -f -c ${configFile cfg}";
};
};
};
anyNylons = collect (p: p ? enable) cfg;
enabledNylons = filter (p: p.enable == true) anyNylons;
nylonUnits = map (nylon: mkNamedNylon nylon) enabledNylons;
in
{
###### interface
options = {
services.nylon = mkOption {
default = {};
description = "Collection of named nylon instances";
type = with types; attrsOf (submodule nylonOpts);
internal = true;
};
};
###### implementation
config = mkIf (length(enabledNylons) > 0) {
users.users.nylon = {
group = "nylon";
description = "Nylon SOCKS Proxy";
home = homeDir;
createHome = true;
uid = config.ids.uids.nylon;
};
users.groups.nylon.gid = config.ids.gids.nylon;
systemd.services = fold (a: b: a // b) {} nylonUnits;
};
}
|