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