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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.shadowsocks;
opts = {
server = cfg.localAddress;
server_port = cfg.port;
method = cfg.encryptionMethod;
mode = cfg.mode;
user = "nobody";
fast_open = true;
} // optionalAttrs (cfg.password != null) { password = cfg.password; };
configFile = pkgs.writeText "shadowsocks.json" (builtins.toJSON opts);
in
{
###### interface
options = {
services.shadowsocks = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to run shadowsocks-libev shadowsocks server.
'';
};
localAddress = mkOption {
type = types.coercedTo types.str singleton (types.listOf types.str);
default = [ "[::0]" "0.0.0.0" ];
description = ''
Local addresses to which the server binds.
'';
};
port = mkOption {
type = types.int;
default = 8388;
description = ''
Port which the server uses.
'';
};
password = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
Password for connecting clients.
'';
};
passwordFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
Password file with a password for connecting clients.
'';
};
mode = mkOption {
type = types.enum [ "tcp_only" "tcp_and_udp" "udp_only" ];
default = "tcp_and_udp";
description = ''
Relay protocols.
'';
};
encryptionMethod = mkOption {
type = types.str;
default = "chacha20-ietf-poly1305";
description = ''
Encryption method. See <link xlink:href="https://github.com/shadowsocks/shadowsocks-org/wiki/AEAD-Ciphers"/>.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
assertions = singleton
{ assertion = cfg.password == null || cfg.passwordFile == null;
message = "Cannot use both password and passwordFile for shadowsocks-libev";
};
systemd.services.shadowsocks-libev = {
description = "shadowsocks-libev Daemon";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = [ pkgs.shadowsocks-libev ] ++ optional (cfg.passwordFile != null) pkgs.jq;
serviceConfig.PrivateTmp = true;
script = ''
${optionalString (cfg.passwordFile != null) ''
cat ${configFile} | jq --arg password "$(cat "${cfg.passwordFile}")" '. + { password: $password }' > /tmp/shadowsocks.json
''}
exec ss-server -c ${if cfg.passwordFile != null then "/tmp/shadowsocks.json" else configFile}
'';
};
};
}
|