nixos/wstunnel: init

This commit is contained in:
alyaeanyx 2023-04-04 00:31:23 +02:00 committed by pennae
parent c471cc0ece
commit bd573376ad
3 changed files with 432 additions and 0 deletions

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@ -73,6 +73,8 @@ In addition to numerous new and upgraded packages, this release has the followin
- [v2rayA](https://v2raya.org), a Linux web GUI client of Project V which supports V2Ray, Xray, SS, SSR, Trojan and Pingtunnel. Available as [services.v2raya](options.html#opt-services.v2raya.enable).
- [wstunnel](https://github.com/erebe/wstunnel), a proxy tunnelling arbitrary TCP or UDP traffic through a WebSocket connection. Instances may be configured via [services.wstunnel](options.html#opt-services.wstunnel.enable).
- [ulogd](https://www.netfilter.org/projects/ulogd/index.html), a userspace logging daemon for netfilter/iptables related logging. Available as [services.ulogd](options.html#opt-services.ulogd.enable).
- [jellyseerr](https://github.com/Fallenbagel/jellyseerr), a web-based requests manager for Jellyfin, forked from Overseerr. Available as [services.jellyseerr](#opt-services.jellyseerr.enable).

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@ -1039,6 +1039,7 @@
./services/networking/wg-quick.nix
./services/networking/wireguard.nix
./services/networking/wpa_supplicant.nix
./services/networking/wstunnel.nix
./services/networking/x2goserver.nix
./services/networking/xandikos.nix
./services/networking/xinetd.nix

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@ -0,0 +1,429 @@
{ config, lib, options, pkgs, utils, ... }:
with lib;
let
cfg = config.services.wstunnel;
attrsToArgs = attrs: utils.escapeSystemdExecArgs (
mapAttrsToList
(name: value: if value == true then "--${name}" else "--${name}=${value}")
attrs
);
hostPortSubmodule = {
options = {
host = mkOption {
description = mdDoc "The hostname.";
type = types.str;
};
port = mkOption {
description = mdDoc "The port.";
type = types.port;
};
};
};
localRemoteSubmodule = {
options = {
local = mkOption {
description = mdDoc "Local address and port to listen on.";
type = types.submodule hostPortSubmodule;
example = {
host = "127.0.0.1";
port = 51820;
};
};
remote = mkOption {
description = mdDoc "Address and port on remote to forward traffic to.";
type = types.submodule hostPortSubmodule;
example = {
host = "127.0.0.1";
port = 51820;
};
};
};
};
hostPortToString = { host, port }: "${host}:${builtins.toString port}";
localRemoteToString = { local, remote }: utils.escapeSystemdExecArg "${hostPortToString local}:${hostPortToString remote}";
commonOptions = {
enable = mkOption {
description = mdDoc "Whether to enable this `wstunnel` instance.";
type = types.bool;
default = true;
};
package = mkPackageOptionMD pkgs "wstunnel" {};
autoStart = mkOption {
description = mdDoc "Whether this tunnel server should be started automatically.";
type = types.bool;
default = true;
};
extraArgs = mkOption {
description = mdDoc "Extra command line arguments to pass to `wstunnel`. Attributes of the form `argName = true;` will be translated to `--argName`, and `argName = \"value\"` to `--argName=value`.";
type = with types; attrsOf (either str bool);
default = {};
example = {
"someNewOption" = true;
"someNewOptionWithValue" = "someValue";
};
};
verboseLogging = mkOption {
description = mdDoc "Enable verbose logging.";
type = types.bool;
default = false;
};
environmentFile = mkOption {
description = mdDoc "Environment file to be passed to the systemd service. Useful for passing secrets to the service to prevent them from being world-readable in the Nix store. Note however that the secrets are passed to `wstunnel` through the command line, which makes them locally readable for all users of the system at runtime.";
type = types.nullOr types.path;
default = null;
example = "/var/lib/secrets/wstunnelSecrets";
};
};
serverSubmodule = { config, ...}: {
options = commonOptions // {
listen = mkOption {
description = mdDoc "Address and port to listen on. Setting the port to a value below 1024 will also give the process the required `CAP_NET_BIND_SERVICE` capability.";
type = types.submodule hostPortSubmodule;
default = {
address = "0.0.0.0";
port = if config.enableHTTPS then 443 else 80;
};
defaultText = literalExpression ''
{
address = "0.0.0.0";
port = if enableHTTPS then 443 else 80;
}
'';
};
restrictTo = mkOption {
description = mdDoc "Accepted traffic will be forwarded only to this service. Set to `null` to allow forwarding to arbitrary addresses.";
type = types.nullOr (types.submodule hostPortSubmodule);
example = {
host = "127.0.0.1";
port = 51820;
};
};
enableHTTPS = mkOption {
description = mdDoc "Use HTTPS for the tunnel server.";
type = types.bool;
default = true;
};
tlsCertificate = mkOption {
description = mdDoc "TLS certificate to use instead of the hardcoded one in case of HTTPS connections. Use together with `tlsKey`.";
type = types.nullOr types.path;
default = null;
example = "/var/lib/secrets/cert.pem";
};
tlsKey = mkOption {
description = mdDoc "TLS key to use instead of the hardcoded on in case of HTTPS connections. Use together with `tlsCertificate`.";
type = types.nullOr types.path;
default = null;
example = "/var/lib/secrets/key.pem";
};
useACMEHost = mkOption {
description = mdDoc "Use a certificate generated by the NixOS ACME module for the given host. Note that this will not generate a new certificate - you will need to do so with `security.acme.certs`.";
type = types.nullOr types.str;
default = null;
example = "example.com";
};
};
};
clientSubmodule = { config, ... }: {
options = commonOptions // {
connectTo = mkOption {
description = mdDoc "Server address and port to connect to.";
type = types.submodule hostPortSubmodule;
example = {
host = "example.com";
};
};
enableHTTPS = mkOption {
description = mdDoc "Enable HTTPS when connecting to the server.";
type = types.bool;
default = true;
};
localToRemote = mkOption {
description = mdDoc "Local hosts and ports to listen on, plus the hosts and ports on remote to forward traffic to. Setting a local port to a value less than 1024 will additionally give the process the required CAP_NET_BIND_SERVICE capability.";
type = types.listOf (types.submodule localRemoteSubmodule);
default = [];
example = [ {
local = {
host = "127.0.0.1";
port = 8080;
};
remote = {
host = "127.0.0.1";
port = 8080;
};
} ];
};
dynamicToRemote = mkOption {
description = mdDoc "Host and port for the SOCKS5 proxy to dynamically forward traffic to. Leave this at `null` to disable the SOCKS5 proxy. Setting the port to a value less than 1024 will additionally give the service the required CAP_NET_BIND_SERVICE capability.";
type = types.nullOr (types.submodule hostPortSubmodule);
default = null;
example = {
host = "127.0.0.1";
port = 1080;
};
};
udp = mkOption {
description = mdDoc "Whether to forward UDP instead of TCP traffic.";
type = types.bool;
default = false;
};
udpTimeout = mkOption {
description = mdDoc "When using UDP forwarding, timeout in seconds after which the tunnel connection is closed. `-1` means no timeout.";
type = types.int;
default = 30;
};
httpProxy = mkOption {
description = mdDoc ''
Proxy to use to connect to the wstunnel server (`USER:PASS@HOST:PORT`).
::: {.warning}
Passwords specified here will be world-readable in the Nix store! To pass a password to the service, point the `environmentFile` option to a file containing `PROXY_PASSWORD=<your-password-here>` and set this option to `<user>:$PROXY_PASSWORD@<host>:<port>`. Note however that this will also locally leak the passwords at runtime via e.g. /proc/<pid>/cmdline.
:::
'';
type = types.nullOr types.str;
default = null;
};
soMark = mkOption {
description = mdDoc "Mark network packets with the SO_MARK sockoption with the specified value. Setting this option will also enable the required `CAP_NET_ADMIN` capability for the systemd service.";
type = types.nullOr types.int;
default = null;
};
upgradePathPrefix = mkOption {
description = mdDoc "Use a specific HTTP path prefix that will show up in the upgrade request to the `wstunnel` server. Useful when running `wstunnel` behind a reverse proxy.";
type = types.nullOr types.str;
default = null;
example = "wstunnel";
};
hostHeader = mkOption {
description = mdDoc "Use this as the HTTP host header instead of the real hostname. Useful for circumventing hostname-based firewalls.";
type = types.nullOr types.str;
default = null;
};
tlsSNI = mkOption {
description = mdDoc "Use this as the SNI while connecting via TLS. Useful for circumventing hostname-based firewalls.";
type = types.nullOr types.str;
default = null;
};
tlsVerifyCertificate = mkOption {
description = mdDoc "Whether to verify the TLS certificate of the server. It might be useful to set this to `false` when working with the `tlsSNI` option.";
type = types.bool;
default = true;
};
# The original argument name `websocketPingFrequency` is a misnomer, as the frequency is the inverse of the interval.
websocketPingInterval = mkOption {
description = mdDoc "Do a heartbeat ping every N seconds to keep up the websocket connection.";
type = types.nullOr types.ints.unsigned;
default = null;
};
upgradeCredentials = mkOption {
description = mdDoc ''
Use these credentials to authenticate during the HTTP upgrade request (Basic authorization type, `USER:[PASS]`).
::: {.warning}
Passwords specified here will be world-readable in the Nix store! To pass a password to the service, point the `environmentFile` option to a file containing `HTTP_PASSWORD=<your-password-here>` and set this option to `<user>:$HTTP_PASSWORD`. Note however that this will also locally leak the passwords at runtime via e.g. /proc/<pid>/cmdline.
:::
'';
type = types.nullOr types.str;
default = null;
};
customHeaders = mkOption {
description = mdDoc "Custom HTTP headers to send during the upgrade request.";
type = types.attrsOf types.str;
default = {};
example = {
"X-Some-Header" = "some-value";
};
};
};
};
generateServerUnit = name: serverCfg: {
name = "wstunnel-server-${name}";
value = {
description = "wstunnel server - ${name}";
requires = [ "network.target" "network-online.target" ];
after = [ "network.target" "network-online.target" ];
wantedBy = optional serverCfg.autoStart "multi-user.target";
serviceConfig = let
certConfig = config.security.acme.certs."${serverCfg.useACMEHost}";
in {
Type = "simple";
ExecStart = with serverCfg; let
resolvedTlsCertificate = if useACMEHost != null
then "${certConfig.directory}/fullchain.pem"
else tlsCertificate;
resolvedTlsKey = if useACMEHost != null
then "${certConfig.directory}/key.pem"
else tlsKey;
in ''
${package}/bin/wstunnel \
--server \
${optionalString (restrictTo != null) "--restrictTo=${utils.escapeSystemdExecArg (hostPortToString restrictTo)}"} \
${optionalString (resolvedTlsCertificate != null) "--tlsCertificate=${utils.escapeSystemdExecArg resolvedTlsCertificate}"} \
${optionalString (resolvedTlsKey != null) "--tlsKey=${utils.escapeSystemdExecArg resolvedTlsKey}"} \
${optionalString verboseLogging "--verbose"} \
${attrsToArgs extraArgs} \
${utils.escapeSystemdExecArg "${if enableHTTPS then "wss" else "ws"}://${hostPortToString listen}"}
'';
EnvironmentFile = optional (serverCfg.environmentFile != null) serverCfg.environmentFile;
DynamicUser = true;
SupplementaryGroups = optional (serverCfg.useACMEHost != null) certConfig.group;
PrivateTmp = true;
AmbientCapabilities = optional (serverCfg.listen.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
NoNewPrivileges = true;
RestrictNamespaces = "uts ipc pid user cgroup";
ProtectSystem = "strict";
ProtectHome = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectControlGroups = true;
PrivateDevices = true;
RestrictSUIDSGID = true;
};
};
};
generateClientUnit = name: clientCfg: {
name = "wstunnel-client-${name}";
value = {
description = "wstunnel client - ${name}";
requires = [ "network.target" "network-online.target" ];
after = [ "network.target" "network-online.target" ];
wantedBy = optional clientCfg.autoStart "multi-user.target";
serviceConfig = {
Type = "simple";
ExecStart = with clientCfg; ''
${package}/bin/wstunnel \
${concatStringsSep " " (builtins.map (x: "--localToRemote=${localRemoteToString x}") localToRemote)} \
${concatStringsSep " " (mapAttrsToList (n: v: "--customHeaders=\"${n}: ${v}\"") customHeaders)} \
${optionalString (dynamicToRemote != null) "--dynamicToRemote=${utils.escapeSystemdExecArg (hostPortToString dynamicToRemote)}"} \
${optionalString udp "--udp"} \
${optionalString (httpProxy != null) "--httpProxy=${httpProxy}"} \
${optionalString (soMark != null) "--soMark=${toString soMark}"} \
${optionalString (upgradePathPrefix != null) "--upgradePathPrefix=${upgradePathPrefix}"} \
${optionalString (hostHeader != null) "--hostHeader=${hostHeader}"} \
${optionalString (tlsSNI != null) "--tlsSNI=${tlsSNI}"} \
${optionalString tlsVerifyCertificate "--tlsVerifyCertificate"} \
${optionalString (websocketPingInterval != null) "--websocketPingFrequency=${toString websocketPingInterval}"} \
${optionalString (upgradeCredentials != null) "--upgradeCredentials=${upgradeCredentials}"} \
--udpTimeoutSec=${toString udpTimeout} \
${optionalString verboseLogging "--verbose"} \
${attrsToArgs extraArgs} \
${utils.escapeSystemdExecArg "${if enableHTTPS then "wss" else "ws"}://${hostPortToString connectTo}"}
'';
EnvironmentFile = optional (clientCfg.environmentFile != null) clientCfg.environmentFile;
DynamicUser = true;
PrivateTmp = true;
AmbientCapabilities = (optional (clientCfg.soMark != null) [ "CAP_NET_ADMIN" ]) ++ (optional ((clientCfg.dynamicToRemote.port or 1024) < 1024 || (any (x: x.local.port < 1024) clientCfg.localToRemote)) [ "CAP_NET_BIND_SERVICE" ]);
NoNewPrivileges = true;
RestrictNamespaces = "uts ipc pid user cgroup";
ProtectSystem = "strict";
ProtectHome = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectControlGroups = true;
PrivateDevices = true;
RestrictSUIDSGID = true;
};
};
};
in {
options.services.wstunnel = {
enable = mkEnableOption (mdDoc "wstunnel");
servers = mkOption {
description = mdDoc "`wstunnel` servers to set up.";
type = types.attrsOf (types.submodule serverSubmodule);
default = {};
example = {
"wg-tunnel" = {
listen.port = 8080;
enableHTTPS = true;
tlsCertificate = "/var/lib/secrets/fullchain.pem";
tlsKey = "/var/lib/secrets/key.pem";
restrictTo = {
host = "127.0.0.1";
port = 51820;
};
};
};
};
clients = mkOption {
description = mdDoc "`wstunnel` clients to set up.";
type = types.attrsOf (types.submodule clientSubmodule);
default = {};
example = {
"wg-tunnel" = {
connectTo = {
host = "example.com";
port = 8080;
};
enableHTTPS = true;
localToRemote = {
local = {
host = "127.0.0.1";
port = 51820;
};
remote = {
host = "127.0.0.1";
port = 51820;
};
};
udp = true;
};
};
};
};
config = mkIf cfg.enable {
systemd.services = (mapAttrs' generateServerUnit (filterAttrs (n: v: v.enable) cfg.servers)) // (mapAttrs' generateClientUnit (filterAttrs (n: v: v.enable) cfg.clients));
assertions = (mapAttrsToList (name: serverCfg: {
assertion = !(serverCfg.useACMEHost != null && (serverCfg.tlsCertificate != null || serverCfg.tlsKey != null));
message = ''
Options services.wstunnel.servers."${name}".useACMEHost and services.wstunnel.servers."${name}".{tlsCertificate, tlsKey} are mutually exclusive.
'';
}) cfg.servers) ++
(mapAttrsToList (name: serverCfg: {
assertion = !((serverCfg.tlsCertificate != null || serverCfg.tlsKey != null) && !(serverCfg.tlsCertificate != null && serverCfg.tlsKey != null));
message = ''
services.wstunnel.servers."${name}".tlsCertificate and services.wstunnel.servers."${name}".tlsKey need to be set together.
'';
}) cfg.servers) ++
(mapAttrsToList (name: clientCfg: {
assertion = !(clientCfg.localToRemote == [] && clientCfg.dynamicToRemote == null);
message = ''
Either one of services.wstunnel.clients."${name}".localToRemote or services.wstunnel.clients."${name}".dynamicToRemote must be set.
'';
}) cfg.clients);
};
meta.maintainers = with maintainers; [ alyaeanyx ];
}